1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427abc52c2SDan Magenheimer #include <linux/cleancache.h> 437c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 44ee73f9a5SJeff Layton #include <linux/iversion.h> 45c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 46c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 47bfff6873SLukas Czerner #include <linux/kthread.h> 48bfff6873SLukas Czerner #include <linux/freezer.h> 499a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 50e5a185c2SLukas Czerner #include <linux/fs_context.h> 51e5a185c2SLukas Czerner #include <linux/fs_parser.h> 52bfff6873SLukas Czerner 533dcf5451SChristoph Hellwig #include "ext4.h" 544a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 553dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 56ac27a0ecSDave Kleikamp #include "xattr.h" 57ac27a0ecSDave Kleikamp #include "acl.h" 583661d286STheodore Ts'o #include "mballoc.h" 590c9ec4beSDarrick J. Wong #include "fsmap.h" 60ac27a0ecSDave Kleikamp 619bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 629bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 639bffad1eSTheodore Ts'o 640b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6559ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 66e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 679f6200bbSTheodore Ts'o 68617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 69ac27a0ecSDave Kleikamp unsigned long journal_devnum); 702adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 712d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 724392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7311215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 74617ba13bSMingming Cao struct ext4_super_block *es); 7511215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 76617ba13bSMingming Cao struct ext4_super_block *es); 77617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 78617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 79617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 80c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 81c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 82152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 83152a0836SAl Viro const char *dev_name, void *data); 842035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 852035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 86bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 87bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 888f1f7453SEric Sandeen static void ext4_clear_request_list(void); 89c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 90c6cb7e77SEric Whitney unsigned int journal_inum); 91da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc); 92b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 93e6e268cbSLukas Czerner struct super_block *sb); 946e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb); 95*02f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param); 96ac27a0ecSDave Kleikamp 97e74031fdSJan Kara /* 98e74031fdSJan Kara * Lock ordering 99e74031fdSJan Kara * 100e74031fdSJan Kara * page fault path: 101d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 102d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 103e74031fdSJan Kara * 104e74031fdSJan Kara * buffered write path: 105c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 106e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 107e74031fdSJan Kara * i_data_sem (rw) 108e74031fdSJan Kara * 109e74031fdSJan Kara * truncate: 110d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 111d4f5258eSJan Kara * page lock 112d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1131d39834fSNikolay Borisov * i_data_sem (rw) 114e74031fdSJan Kara * 115e74031fdSJan Kara * direct IO: 116c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1171d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 118e74031fdSJan Kara * 119e74031fdSJan Kara * writepages: 120e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 121e74031fdSJan Kara */ 122e74031fdSJan Kara 123*02f960f8SLukas Czerner static const struct fs_context_operations ext4_context_ops = { 124*02f960f8SLukas Czerner .parse_param = ext4_parse_param, 125*02f960f8SLukas Czerner }; 126*02f960f8SLukas Czerner 127*02f960f8SLukas Czerner 128c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1292035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1302035e776STheodore Ts'o .owner = THIS_MODULE, 1312035e776STheodore Ts'o .name = "ext2", 1322035e776STheodore Ts'o .mount = ext4_mount, 1332035e776STheodore Ts'o .kill_sb = kill_block_super, 1342035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1352035e776STheodore Ts'o }; 1367f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 137fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1382035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1392035e776STheodore Ts'o #else 1402035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1412035e776STheodore Ts'o #endif 1422035e776STheodore Ts'o 1432035e776STheodore Ts'o 144ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 145ba69f9abSJan Kara .owner = THIS_MODULE, 146ba69f9abSJan Kara .name = "ext3", 147152a0836SAl Viro .mount = ext4_mount, 148ba69f9abSJan Kara .kill_sb = kill_block_super, 149ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 150ba69f9abSJan Kara }; 1517f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 152fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 153ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 154bd81d8eeSLaurent Vivier 155fa491b14Szhangyi (F) 156fa491b14Szhangyi (F) static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags, 157fa491b14Szhangyi (F) bh_end_io_t *end_io) 158fa491b14Szhangyi (F) { 159fb265c9cSTheodore Ts'o /* 160fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 161fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 162fa491b14Szhangyi (F) * recheck the buffer contents. 163fa491b14Szhangyi (F) */ 164fa491b14Szhangyi (F) clear_buffer_verified(bh); 165fa491b14Szhangyi (F) 166fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 167fa491b14Szhangyi (F) get_bh(bh); 168fa491b14Szhangyi (F) submit_bh(REQ_OP_READ, op_flags, bh); 169fa491b14Szhangyi (F) } 170fa491b14Szhangyi (F) 171fa491b14Szhangyi (F) void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 172fa491b14Szhangyi (F) bh_end_io_t *end_io) 173fa491b14Szhangyi (F) { 174fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 175fa491b14Szhangyi (F) 176fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 177fa491b14Szhangyi (F) unlock_buffer(bh); 178fa491b14Szhangyi (F) return; 179fa491b14Szhangyi (F) } 180fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 181fa491b14Szhangyi (F) } 182fa491b14Szhangyi (F) 183fa491b14Szhangyi (F) int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io) 184fa491b14Szhangyi (F) { 185fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 186fa491b14Szhangyi (F) 187fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 188fa491b14Szhangyi (F) unlock_buffer(bh); 189fa491b14Szhangyi (F) return 0; 190fa491b14Szhangyi (F) } 191fa491b14Szhangyi (F) 192fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 193fa491b14Szhangyi (F) 194fa491b14Szhangyi (F) wait_on_buffer(bh); 195fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 196fa491b14Szhangyi (F) return 0; 197fa491b14Szhangyi (F) return -EIO; 198fa491b14Szhangyi (F) } 199fa491b14Szhangyi (F) 200fa491b14Szhangyi (F) int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait) 201fa491b14Szhangyi (F) { 202fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 203fa491b14Szhangyi (F) if (wait) 204fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 205fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 206fa491b14Szhangyi (F) return 0; 207fa491b14Szhangyi (F) } 208fa491b14Szhangyi (F) if (wait) { 209fa491b14Szhangyi (F) wait_on_buffer(bh); 210fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 211fa491b14Szhangyi (F) return 0; 212fa491b14Szhangyi (F) return -EIO; 213fa491b14Szhangyi (F) } 214fa491b14Szhangyi (F) return 0; 215fa491b14Szhangyi (F) } 216fa491b14Szhangyi (F) 217fb265c9cSTheodore Ts'o /* 2188394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 219fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 220fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 221fb265c9cSTheodore Ts'o * return. 222fb265c9cSTheodore Ts'o */ 2238394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 2248394a6abSzhangyi (F) sector_t block, int op_flags, 2258394a6abSzhangyi (F) gfp_t gfp) 226fb265c9cSTheodore Ts'o { 2272d069c08Szhangyi (F) struct buffer_head *bh; 2282d069c08Szhangyi (F) int ret; 229fb265c9cSTheodore Ts'o 2308394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 231fb265c9cSTheodore Ts'o if (bh == NULL) 232fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 233cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 234fb265c9cSTheodore Ts'o return bh; 2352d069c08Szhangyi (F) 2362d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2372d069c08Szhangyi (F) if (ret) { 238fb265c9cSTheodore Ts'o put_bh(bh); 2392d069c08Szhangyi (F) return ERR_PTR(ret); 2402d069c08Szhangyi (F) } 2412d069c08Szhangyi (F) return bh; 242fb265c9cSTheodore Ts'o } 243fb265c9cSTheodore Ts'o 2448394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 2458394a6abSzhangyi (F) int op_flags) 2468394a6abSzhangyi (F) { 2478394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2488394a6abSzhangyi (F) } 2498394a6abSzhangyi (F) 2508394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2518394a6abSzhangyi (F) sector_t block) 2528394a6abSzhangyi (F) { 2538394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2548394a6abSzhangyi (F) } 2558394a6abSzhangyi (F) 2565df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2575df1d412Szhangyi (F) { 2585df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2595df1d412Szhangyi (F) 2605df1d412Szhangyi (F) if (likely(bh)) { 2615df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2625df1d412Szhangyi (F) brelse(bh); 2635df1d412Szhangyi (F) } 264c197855eSStephen Hemminger } 265a9c47317SDarrick J. Wong 266a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2679aa5d32bSDmitry Monakhov struct ext4_super_block *es) 268a9c47317SDarrick J. Wong { 269a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 270a9c47317SDarrick J. Wong return 1; 271a9c47317SDarrick J. Wong 272a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 27306db49e6STheodore Ts'o } 274a9c47317SDarrick J. Wong 27506db49e6STheodore Ts'o static __le32 ext4_superblock_csum(struct super_block *sb, 27606db49e6STheodore Ts'o struct ext4_super_block *es) 2779aa5d32bSDmitry Monakhov { 278a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 279a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 280a9c47317SDarrick J. Wong __u32 csum; 281a9c47317SDarrick J. Wong 282a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 2839933fc0aSTheodore Ts'o 2849933fc0aSTheodore Ts'o return cpu_to_le32(csum); 2859933fc0aSTheodore Ts'o } 2869933fc0aSTheodore Ts'o 2878be04b93SJoe Perches static int ext4_superblock_csum_verify(struct super_block *sb, 2889933fc0aSTheodore Ts'o struct ext4_super_block *es) 2899933fc0aSTheodore Ts'o { 2909933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2919933fc0aSTheodore Ts'o return 1; 2929933fc0aSTheodore Ts'o 2939933fc0aSTheodore Ts'o return es->s_checksum == ext4_superblock_csum(sb, es); 2949933fc0aSTheodore Ts'o } 2959933fc0aSTheodore Ts'o 2969933fc0aSTheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 2978be04b93SJoe Perches { 2989933fc0aSTheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2999933fc0aSTheodore Ts'o 3009933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 3019933fc0aSTheodore Ts'o return; 3029933fc0aSTheodore Ts'o 3038fadc143SAlexandre Ratchov es->s_checksum = ext4_superblock_csum(sb, es); 3048fadc143SAlexandre Ratchov } 305bd81d8eeSLaurent Vivier 306bd81d8eeSLaurent Vivier ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 307bd81d8eeSLaurent Vivier struct ext4_group_desc *bg) 308bd81d8eeSLaurent Vivier { 3093a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3108fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3118fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 312bd81d8eeSLaurent Vivier } 313bd81d8eeSLaurent Vivier 3148fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3158fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 316bd81d8eeSLaurent Vivier { 3175272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3188fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3198fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 320bd81d8eeSLaurent Vivier } 321bd81d8eeSLaurent Vivier 3228fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3238fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 324bd81d8eeSLaurent Vivier { 3255272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3268fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3278fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 328bd81d8eeSLaurent Vivier } 329bd81d8eeSLaurent Vivier 330021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 331560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 332560671a0SAneesh Kumar K.V { 333560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 334560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 335560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 336560671a0SAneesh Kumar K.V } 337560671a0SAneesh Kumar K.V 338560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 339560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 340560671a0SAneesh Kumar K.V { 341560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 342560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 343560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 344560671a0SAneesh Kumar K.V } 345560671a0SAneesh Kumar K.V 346560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 347560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 348560671a0SAneesh Kumar K.V { 349560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 350560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 351560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 352560671a0SAneesh Kumar K.V } 353560671a0SAneesh Kumar K.V 354560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 355560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 356560671a0SAneesh Kumar K.V { 357560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 358560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 359560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 360560671a0SAneesh Kumar K.V } 361560671a0SAneesh Kumar K.V 3628fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3638fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 364bd81d8eeSLaurent Vivier { 3653a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3668fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3678fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 368bd81d8eeSLaurent Vivier } 369bd81d8eeSLaurent Vivier 3708fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3718fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 372bd81d8eeSLaurent Vivier { 3735272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3748fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3758fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 376bd81d8eeSLaurent Vivier } 377bd81d8eeSLaurent Vivier 3788fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3798fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 380bd81d8eeSLaurent Vivier { 3815272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3828fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3838fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 384bd81d8eeSLaurent Vivier } 385bd81d8eeSLaurent Vivier 386021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 387560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 388560671a0SAneesh Kumar K.V { 389560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 390560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 391560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 392560671a0SAneesh Kumar K.V } 393560671a0SAneesh Kumar K.V 394560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 395560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 396560671a0SAneesh Kumar K.V { 397560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 398560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 399560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 400560671a0SAneesh Kumar K.V } 401560671a0SAneesh Kumar K.V 402560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 403560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 404560671a0SAneesh Kumar K.V { 405560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 406560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 407560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 408560671a0SAneesh Kumar K.V } 409560671a0SAneesh Kumar K.V 410560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 411560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 412560671a0SAneesh Kumar K.V { 413560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 414560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 415560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 416560671a0SAneesh Kumar K.V } 417560671a0SAneesh Kumar K.V 418c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4196a0678a7SArnd Bergmann { 4206a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4216a0678a7SArnd Bergmann 4226a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4236a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4246a0678a7SArnd Bergmann } 4256a0678a7SArnd Bergmann 4266a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4276a0678a7SArnd Bergmann { 4286a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4296a0678a7SArnd Bergmann } 4306a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 431c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 432c92dc856SJan Kara ktime_get_real_seconds()) 4336a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4346a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 435d3d1faf6SCurt Wohlgemuth 436bdfe0cbdSTheodore Ts'o /* 437bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 438bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 439bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 440bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 441bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 442bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 443bdfe0cbdSTheodore Ts'o */ 444bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 445bdfe0cbdSTheodore Ts'o { 446bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 447bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 448bdfe0cbdSTheodore Ts'o 449bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 450bdfe0cbdSTheodore Ts'o } 451bdfe0cbdSTheodore Ts'o 45218aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 45318aadd47SBobi Jam { 45418aadd47SBobi Jam struct super_block *sb = journal->j_private; 45518aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 45618aadd47SBobi Jam int error = is_journal_aborted(journal); 4575d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 45818aadd47SBobi Jam 4595d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 460a0154344SDaeho Jeong 461a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 462a0154344SDaeho Jeong 46318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4645d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4655d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4665d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 46718aadd47SBobi Jam list_del_init(&jce->jce_list); 46818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46918aadd47SBobi Jam jce->jce_func(sb, jce, error); 47018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 47118aadd47SBobi Jam } 47218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47318aadd47SBobi Jam } 4741c13d5c0STheodore Ts'o 475afb585a9SMauricio Faria de Oliveira /* 476afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 477afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 478afb585a9SMauricio Faria de Oliveira * 479afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 480afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 481afb585a9SMauricio Faria de Oliveira * to write protect the pages. 482afb585a9SMauricio Faria de Oliveira * 483afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 484afb585a9SMauricio Faria de Oliveira */ 485afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 486afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 487afb585a9SMauricio Faria de Oliveira void *data) 488afb585a9SMauricio Faria de Oliveira { 489afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 490afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 491afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 492afb585a9SMauricio Faria de Oliveira 493afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 494afb585a9SMauricio Faria de Oliveira do { 495afb585a9SMauricio Faria de Oliveira /* 496afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 497afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 498afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 499afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 500afb585a9SMauricio Faria de Oliveira * properly. 501afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 502afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 503afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 504afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 505afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 506afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 507afb585a9SMauricio Faria de Oliveira */ 508afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 509afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 510afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 511afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 512afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 513afb585a9SMauricio Faria de Oliveira goto out; 514afb585a9SMauricio Faria de Oliveira } 515afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 516afb585a9SMauricio Faria de Oliveira 517afb585a9SMauricio Faria de Oliveira out: 518afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 519afb585a9SMauricio Faria de Oliveira } 520afb585a9SMauricio Faria de Oliveira 521afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 522afb585a9SMauricio Faria de Oliveira { 523afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 524afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 525afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 526afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 527afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 528afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 529afb585a9SMauricio Faria de Oliveira }; 530afb585a9SMauricio Faria de Oliveira 531afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 532afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 533afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 534afb585a9SMauricio Faria de Oliveira } 535afb585a9SMauricio Faria de Oliveira 536afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 537afb585a9SMauricio Faria de Oliveira { 538afb585a9SMauricio Faria de Oliveira int ret; 539afb585a9SMauricio Faria de Oliveira 540afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 541afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 542afb585a9SMauricio Faria de Oliveira else 543afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 544afb585a9SMauricio Faria de Oliveira 545afb585a9SMauricio Faria de Oliveira return ret; 546afb585a9SMauricio Faria de Oliveira } 547afb585a9SMauricio Faria de Oliveira 548afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 549afb585a9SMauricio Faria de Oliveira { 550afb585a9SMauricio Faria de Oliveira int ret = 0; 551afb585a9SMauricio Faria de Oliveira 552afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 553afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 554afb585a9SMauricio Faria de Oliveira 555afb585a9SMauricio Faria de Oliveira return ret; 556afb585a9SMauricio Faria de Oliveira } 557afb585a9SMauricio Faria de Oliveira 5581dc1097fSJan Kara static bool system_going_down(void) 5591dc1097fSJan Kara { 5601dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5611dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5621dc1097fSJan Kara } 5631dc1097fSJan Kara 56402a7780eSJan Kara struct ext4_err_translation { 56502a7780eSJan Kara int code; 56602a7780eSJan Kara int errno; 56702a7780eSJan Kara }; 56802a7780eSJan Kara 56902a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 57002a7780eSJan Kara 57102a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 57202a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 57302a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 57402a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 57502a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 57602a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 57702a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 58202a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 58302a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 58402a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 58502a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 58602a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 58702a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 58802a7780eSJan Kara }; 58902a7780eSJan Kara 59002a7780eSJan Kara static int ext4_errno_to_code(int errno) 59102a7780eSJan Kara { 59202a7780eSJan Kara int i; 59302a7780eSJan Kara 59402a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 59502a7780eSJan Kara if (err_translation[i].errno == errno) 59602a7780eSJan Kara return err_translation[i].code; 59702a7780eSJan Kara return EXT4_ERR_UNKNOWN; 59802a7780eSJan Kara } 59902a7780eSJan Kara 6002d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 60140676623SJan Kara __u32 ino, __u64 block, 60240676623SJan Kara const char *func, unsigned int line) 60340676623SJan Kara { 604c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 60540676623SJan Kara 60602a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 60702a7780eSJan Kara if (error == 0) 60802a7780eSJan Kara error = EFSCORRUPTED; 609c92dc856SJan Kara 610c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 611c92dc856SJan Kara sbi->s_add_error_count++; 612c92dc856SJan Kara sbi->s_last_error_code = error; 613c92dc856SJan Kara sbi->s_last_error_line = line; 614c92dc856SJan Kara sbi->s_last_error_ino = ino; 615c92dc856SJan Kara sbi->s_last_error_block = block; 616c92dc856SJan Kara sbi->s_last_error_func = func; 617c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 618c92dc856SJan Kara if (!sbi->s_first_error_time) { 619c92dc856SJan Kara sbi->s_first_error_code = error; 620c92dc856SJan Kara sbi->s_first_error_line = line; 621c92dc856SJan Kara sbi->s_first_error_ino = ino; 622c92dc856SJan Kara sbi->s_first_error_block = block; 623c92dc856SJan Kara sbi->s_first_error_func = func; 624c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 62540676623SJan Kara } 626c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 62740676623SJan Kara } 62840676623SJan Kara 629ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 630ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 631ac27a0ecSDave Kleikamp * 632ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 633617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 634ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 635ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 636ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 637ac27a0ecSDave Kleikamp * write out the superblock safely. 638ac27a0ecSDave Kleikamp * 639dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 640d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 641ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 642014c9caaSJan Kara * 643014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 644014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 645014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 646014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 647014c9caaSJan Kara * at a critical moment in log management. 648ac27a0ecSDave Kleikamp */ 649e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 650e789ca0cSJan Kara __u32 ino, __u64 block, 651e789ca0cSJan Kara const char *func, unsigned int line) 652ac27a0ecSDave Kleikamp { 653b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6542d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 655b08070ecSJan Kara 656e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 657327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 658327eaf73STheodore Ts'o WARN_ON_ONCE(1); 659327eaf73STheodore Ts'o 6602d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6619b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 662ac27a0ecSDave Kleikamp if (journal) 663dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6642d01ddc8SJan Kara } 6652d01ddc8SJan Kara 6662d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6672d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6682d01ddc8SJan Kara /* 6692d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6702d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6712d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6722d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6732d01ddc8SJan Kara */ 674bb9464e0Syangerkun if (continue_fs && journal) 6752d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6762d01ddc8SJan Kara else 6772d01ddc8SJan Kara ext4_commit_super(sb); 6782d01ddc8SJan Kara } 6792d01ddc8SJan Kara 6801dc1097fSJan Kara /* 6811dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6821dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6831dc1097fSJan Kara * disabled. 6841dc1097fSJan Kara */ 685014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 686617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 687ac27a0ecSDave Kleikamp sb->s_id); 688ac27a0ecSDave Kleikamp } 689ac2f7ca5SYe Bin 690ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 691ac2f7ca5SYe Bin return; 692ac2f7ca5SYe Bin 693014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 694014c9caaSJan Kara /* 695014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 696014c9caaSJan Kara * ->s_flags update 697014c9caaSJan Kara */ 698014c9caaSJan Kara smp_wmb(); 699014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 7004327ba52SDaeho Jeong } 701ac27a0ecSDave Kleikamp 702c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 703c92dc856SJan Kara { 704c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 705c92dc856SJan Kara s_error_work); 7062d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7072d01ddc8SJan Kara handle_t *handle; 708c92dc856SJan Kara 7092d01ddc8SJan Kara /* 7102d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7112d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7122d01ddc8SJan Kara * updates. 7132d01ddc8SJan Kara * 7142d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7152d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7162d01ddc8SJan Kara */ 7172d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 718558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7192d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7202d01ddc8SJan Kara if (IS_ERR(handle)) 7212d01ddc8SJan Kara goto write_directly; 722558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7232d01ddc8SJan Kara jbd2_journal_stop(handle); 7242d01ddc8SJan Kara goto write_directly; 7252d01ddc8SJan Kara } 7262d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 727558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 728558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 729558d6450SYe Bin "superblock detected"); 730558d6450SYe Bin clear_buffer_write_io_error(sbh); 731558d6450SYe Bin set_buffer_uptodate(sbh); 732558d6450SYe Bin } 733558d6450SYe Bin 734558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7352d01ddc8SJan Kara jbd2_journal_stop(handle); 7362d01ddc8SJan Kara goto write_directly; 7372d01ddc8SJan Kara } 7382d01ddc8SJan Kara jbd2_journal_stop(handle); 739d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7402d01ddc8SJan Kara return; 7412d01ddc8SJan Kara } 7422d01ddc8SJan Kara write_directly: 7432d01ddc8SJan Kara /* 7442d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7452d01ddc8SJan Kara * out and hope for the best. 7462d01ddc8SJan Kara */ 7474392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 748d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 749ac27a0ecSDave Kleikamp } 750ac27a0ecSDave Kleikamp 751efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 752efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 753efbed4dcSTheodore Ts'o "EXT4-fs error") 754efbed4dcSTheodore Ts'o 75512062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 756014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 75754d3adbcSTheodore Ts'o const char *fmt, ...) 758ac27a0ecSDave Kleikamp { 7590ff2ea7dSJoe Perches struct va_format vaf; 760ac27a0ecSDave Kleikamp va_list args; 761ac27a0ecSDave Kleikamp 7620db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7630db1ff22STheodore Ts'o return; 7640db1ff22STheodore Ts'o 765ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 766efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 767ac27a0ecSDave Kleikamp va_start(args, fmt); 7680ff2ea7dSJoe Perches vaf.fmt = fmt; 7690ff2ea7dSJoe Perches vaf.va = &args; 770efbed4dcSTheodore Ts'o printk(KERN_CRIT 771efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7720ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 773ac27a0ecSDave Kleikamp va_end(args); 774efbed4dcSTheodore Ts'o } 7759a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7769a089b21SGabriel Krisman Bertazi 777e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 778ac27a0ecSDave Kleikamp } 779ac27a0ecSDave Kleikamp 780e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 78154d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 782273df556SFrank Mayhar const char *fmt, ...) 783273df556SFrank Mayhar { 784273df556SFrank Mayhar va_list args; 785f7c21177STheodore Ts'o struct va_format vaf; 786273df556SFrank Mayhar 7870db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7880db1ff22STheodore Ts'o return; 7890db1ff22STheodore Ts'o 790ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 791efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 792273df556SFrank Mayhar va_start(args, fmt); 793f7c21177STheodore Ts'o vaf.fmt = fmt; 794f7c21177STheodore Ts'o vaf.va = &args; 795c398eda0STheodore Ts'o if (block) 796d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 797d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 798d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 799d9ee81daSJoe Perches block, current->comm, &vaf); 800d9ee81daSJoe Perches else 801d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 802d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 803d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 804d9ee81daSJoe Perches current->comm, &vaf); 805273df556SFrank Mayhar va_end(args); 806efbed4dcSTheodore Ts'o } 8079a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8089a089b21SGabriel Krisman Bertazi 809e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 81054d3adbcSTheodore Ts'o function, line); 811273df556SFrank Mayhar } 812273df556SFrank Mayhar 813e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 814f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 815f7c21177STheodore Ts'o const char *fmt, ...) 816273df556SFrank Mayhar { 817273df556SFrank Mayhar va_list args; 818f7c21177STheodore Ts'o struct va_format vaf; 819496ad9aaSAl Viro struct inode *inode = file_inode(file); 820273df556SFrank Mayhar char pathname[80], *path; 821273df556SFrank Mayhar 8220db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8230db1ff22STheodore Ts'o return; 8240db1ff22STheodore Ts'o 825ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 826efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8279bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 828f9a62d09SDan Carpenter if (IS_ERR(path)) 829273df556SFrank Mayhar path = "(unknown)"; 830f7c21177STheodore Ts'o va_start(args, fmt); 831f7c21177STheodore Ts'o vaf.fmt = fmt; 832f7c21177STheodore Ts'o vaf.va = &args; 833d9ee81daSJoe Perches if (block) 834d9ee81daSJoe Perches printk(KERN_CRIT 835d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 836d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 837d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 838d9ee81daSJoe Perches block, current->comm, path, &vaf); 839d9ee81daSJoe Perches else 840d9ee81daSJoe Perches printk(KERN_CRIT 841d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 842d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 843d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 844d9ee81daSJoe Perches current->comm, path, &vaf); 845273df556SFrank Mayhar va_end(args); 846efbed4dcSTheodore Ts'o } 8479a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8489a089b21SGabriel Krisman Bertazi 849e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 85054d3adbcSTheodore Ts'o function, line); 851273df556SFrank Mayhar } 852273df556SFrank Mayhar 853722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 854ac27a0ecSDave Kleikamp char nbuf[16]) 855ac27a0ecSDave Kleikamp { 856ac27a0ecSDave Kleikamp char *errstr = NULL; 857ac27a0ecSDave Kleikamp 858ac27a0ecSDave Kleikamp switch (errno) { 8596a797d27SDarrick J. Wong case -EFSCORRUPTED: 8606a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8616a797d27SDarrick J. Wong break; 8626a797d27SDarrick J. Wong case -EFSBADCRC: 8636a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8646a797d27SDarrick J. Wong break; 865ac27a0ecSDave Kleikamp case -EIO: 866ac27a0ecSDave Kleikamp errstr = "IO failure"; 867ac27a0ecSDave Kleikamp break; 868ac27a0ecSDave Kleikamp case -ENOMEM: 869ac27a0ecSDave Kleikamp errstr = "Out of memory"; 870ac27a0ecSDave Kleikamp break; 871ac27a0ecSDave Kleikamp case -EROFS: 87278f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 87378f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 874ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 875ac27a0ecSDave Kleikamp else 876ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 877ac27a0ecSDave Kleikamp break; 878ac27a0ecSDave Kleikamp default: 879ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 880ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 881ac27a0ecSDave Kleikamp * NULL. */ 882ac27a0ecSDave Kleikamp if (nbuf) { 883ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 884ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 885ac27a0ecSDave Kleikamp errstr = nbuf; 886ac27a0ecSDave Kleikamp } 887ac27a0ecSDave Kleikamp break; 888ac27a0ecSDave Kleikamp } 889ac27a0ecSDave Kleikamp 890ac27a0ecSDave Kleikamp return errstr; 891ac27a0ecSDave Kleikamp } 892ac27a0ecSDave Kleikamp 893617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 894ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 895ac27a0ecSDave Kleikamp 896c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 897c398eda0STheodore Ts'o unsigned int line, int errno) 898ac27a0ecSDave Kleikamp { 899ac27a0ecSDave Kleikamp char nbuf[16]; 900ac27a0ecSDave Kleikamp const char *errstr; 901ac27a0ecSDave Kleikamp 9020db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9030db1ff22STheodore Ts'o return; 9040db1ff22STheodore Ts'o 905ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 906ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 907ac27a0ecSDave Kleikamp * an error. */ 908bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 909ac27a0ecSDave Kleikamp return; 910ac27a0ecSDave Kleikamp 911efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 912617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 913c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 914c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 915efbed4dcSTheodore Ts'o } 9169a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 917ac27a0ecSDave Kleikamp 918e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 919ac27a0ecSDave Kleikamp } 920ac27a0ecSDave Kleikamp 921e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 922e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 923b31e1552SEric Sandeen { 9240ff2ea7dSJoe Perches struct va_format vaf; 925b31e1552SEric Sandeen va_list args; 926b31e1552SEric Sandeen 927da812f61SLukas Czerner if (sb) { 9281cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 929da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 930da812f61SLukas Czerner "EXT4-fs")) 931efbed4dcSTheodore Ts'o return; 932da812f61SLukas Czerner } 933efbed4dcSTheodore Ts'o 934b31e1552SEric Sandeen va_start(args, fmt); 9350ff2ea7dSJoe Perches vaf.fmt = fmt; 9360ff2ea7dSJoe Perches vaf.va = &args; 937da812f61SLukas Czerner if (sb) 9380ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 939da812f61SLukas Czerner else 940da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 941b31e1552SEric Sandeen va_end(args); 942b31e1552SEric Sandeen } 943b31e1552SEric Sandeen 9441cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9451cf006edSDmitry Monakhov { 9461cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9471cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9481cf006edSDmitry Monakhov "EXT4-fs warning"); 9491cf006edSDmitry Monakhov } 950b03a2f7eSAndreas Dilger 95112062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 952c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 953ac27a0ecSDave Kleikamp { 9540ff2ea7dSJoe Perches struct va_format vaf; 955ac27a0ecSDave Kleikamp va_list args; 956ac27a0ecSDave Kleikamp 957b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 958efbed4dcSTheodore Ts'o return; 959efbed4dcSTheodore Ts'o 960ac27a0ecSDave Kleikamp va_start(args, fmt); 9610ff2ea7dSJoe Perches vaf.fmt = fmt; 9620ff2ea7dSJoe Perches vaf.va = &args; 9630ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9640ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 965ac27a0ecSDave Kleikamp va_end(args); 966ac27a0ecSDave Kleikamp } 967ac27a0ecSDave Kleikamp 968b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 969b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 970b03a2f7eSAndreas Dilger { 971b03a2f7eSAndreas Dilger struct va_format vaf; 972b03a2f7eSAndreas Dilger va_list args; 973b03a2f7eSAndreas Dilger 974b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 975b03a2f7eSAndreas Dilger return; 976b03a2f7eSAndreas Dilger 977b03a2f7eSAndreas Dilger va_start(args, fmt); 978b03a2f7eSAndreas Dilger vaf.fmt = fmt; 979b03a2f7eSAndreas Dilger vaf.va = &args; 980b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 981b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 982b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 983b03a2f7eSAndreas Dilger va_end(args); 984b03a2f7eSAndreas Dilger } 985b03a2f7eSAndreas Dilger 986e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 987e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 988e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 989e29136f8STheodore Ts'o const char *fmt, ...) 9905d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9915d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9925d1b1b3fSAneesh Kumar K.V { 9930ff2ea7dSJoe Perches struct va_format vaf; 9945d1b1b3fSAneesh Kumar K.V va_list args; 9955d1b1b3fSAneesh Kumar K.V 9960db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9970db1ff22STheodore Ts'o return; 9980db1ff22STheodore Ts'o 999ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 1000efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10015d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10020ff2ea7dSJoe Perches vaf.fmt = fmt; 10030ff2ea7dSJoe Perches vaf.va = &args; 100421149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1005e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1006e29136f8STheodore Ts'o if (ino) 10070ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1008e29136f8STheodore Ts'o if (block) 1009efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1010efbed4dcSTheodore Ts'o (unsigned long long) block); 10110ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10125d1b1b3fSAneesh Kumar K.V va_end(args); 1013efbed4dcSTheodore Ts'o } 10145d1b1b3fSAneesh Kumar K.V 1015c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1016327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1017327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1018e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10192d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10202d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10212d01ddc8SJan Kara line); 1022c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10232d01ddc8SJan Kara } 10245d1b1b3fSAneesh Kumar K.V return; 10255d1b1b3fSAneesh Kumar K.V } 10265d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1027e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10285d1b1b3fSAneesh Kumar K.V /* 10295d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10305d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10315d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10325d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10335d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 103425985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10355d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10365d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10375d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10385d1b1b3fSAneesh Kumar K.V */ 10395d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10405d1b1b3fSAneesh Kumar K.V return; 10415d1b1b3fSAneesh Kumar K.V } 10425d1b1b3fSAneesh Kumar K.V 1043db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1044db79e6d1SWang Shilong ext4_group_t group, 1045db79e6d1SWang Shilong unsigned int flags) 1046db79e6d1SWang Shilong { 1047db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1048db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1049db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10509af0b3d1SWang Shilong int ret; 1051db79e6d1SWang Shilong 10529af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10539af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10549af0b3d1SWang Shilong &grp->bb_state); 10559af0b3d1SWang Shilong if (!ret) 1056db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1057db79e6d1SWang Shilong grp->bb_free); 1058db79e6d1SWang Shilong } 1059db79e6d1SWang Shilong 10609af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10619af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10629af0b3d1SWang Shilong &grp->bb_state); 10639af0b3d1SWang Shilong if (!ret && gdp) { 1064db79e6d1SWang Shilong int count; 1065db79e6d1SWang Shilong 1066db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1067db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1068db79e6d1SWang Shilong count); 1069db79e6d1SWang Shilong } 1070db79e6d1SWang Shilong } 1071db79e6d1SWang Shilong } 1072db79e6d1SWang Shilong 1073617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1074ac27a0ecSDave Kleikamp { 1075617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1076ac27a0ecSDave Kleikamp 1077617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1078ac27a0ecSDave Kleikamp return; 1079ac27a0ecSDave Kleikamp 108012062dddSEric Sandeen ext4_warning(sb, 1081ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1082ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1083617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1084ac27a0ecSDave Kleikamp 1085617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1086617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1087617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1088ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1089ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1090ac27a0ecSDave Kleikamp 1091ac27a0ecSDave Kleikamp /* 1092ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1093ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1094ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1095ac27a0ecSDave Kleikamp */ 1096ac27a0ecSDave Kleikamp } 1097ac27a0ecSDave Kleikamp 1098ac27a0ecSDave Kleikamp /* 1099ac27a0ecSDave Kleikamp * Open the external journal device 1100ac27a0ecSDave Kleikamp */ 1101b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1102ac27a0ecSDave Kleikamp { 1103ac27a0ecSDave Kleikamp struct block_device *bdev; 1104ac27a0ecSDave Kleikamp 1105d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1106ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1107ac27a0ecSDave Kleikamp goto fail; 1108ac27a0ecSDave Kleikamp return bdev; 1109ac27a0ecSDave Kleikamp 1110ac27a0ecSDave Kleikamp fail: 1111ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1112ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1113ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1114ac27a0ecSDave Kleikamp return NULL; 1115ac27a0ecSDave Kleikamp } 1116ac27a0ecSDave Kleikamp 1117ac27a0ecSDave Kleikamp /* 1118ac27a0ecSDave Kleikamp * Release the journal device 1119ac27a0ecSDave Kleikamp */ 11204385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1121ac27a0ecSDave Kleikamp { 11224385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1123ac27a0ecSDave Kleikamp } 1124ac27a0ecSDave Kleikamp 11254385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1126ac27a0ecSDave Kleikamp { 1127ac27a0ecSDave Kleikamp struct block_device *bdev; 1128ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1129ac27a0ecSDave Kleikamp if (bdev) { 11304385bab1SAl Viro ext4_blkdev_put(bdev); 1131ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1132ac27a0ecSDave Kleikamp } 1133ac27a0ecSDave Kleikamp } 1134ac27a0ecSDave Kleikamp 1135ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1136ac27a0ecSDave Kleikamp { 1137617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1138ac27a0ecSDave Kleikamp } 1139ac27a0ecSDave Kleikamp 1140617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1141ac27a0ecSDave Kleikamp { 1142ac27a0ecSDave Kleikamp struct list_head *l; 1143ac27a0ecSDave Kleikamp 1144b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1145ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1146ac27a0ecSDave Kleikamp 1147ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1148ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1149ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1150ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1151ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1152ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1153ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1154ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1155ac27a0ecSDave Kleikamp } 1156ac27a0ecSDave Kleikamp } 1157ac27a0ecSDave Kleikamp 1158957153fcSJan Kara #ifdef CONFIG_QUOTA 1159957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1160957153fcSJan Kara 1161957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1162957153fcSJan Kara { 1163957153fcSJan Kara int type; 1164957153fcSJan Kara 1165957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1166957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1167957153fcSJan Kara ext4_quota_off(sb, type); 1168957153fcSJan Kara } 116933458eabSTheodore Ts'o 117033458eabSTheodore Ts'o /* 117133458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 117233458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 117333458eabSTheodore Ts'o */ 117433458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 117533458eabSTheodore Ts'o struct ext4_sb_info *sbi, 117633458eabSTheodore Ts'o int type) 117733458eabSTheodore Ts'o { 117833458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 117933458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 118033458eabSTheodore Ts'o } 1181957153fcSJan Kara #else 1182957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1183957153fcSJan Kara { 1184957153fcSJan Kara } 1185957153fcSJan Kara #endif 1186957153fcSJan Kara 1187617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1188ac27a0ecSDave Kleikamp { 1189617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1190617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11911d0c3924STheodore Ts'o struct buffer_head **group_desc; 11927c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 119397abd7d4STheodore Ts'o int aborted = 0; 1194ef2cabf7SHidehiro Kawai int i, err; 1195ac27a0ecSDave Kleikamp 1196857ac889SLukas Czerner ext4_unregister_li_request(sb); 1197957153fcSJan Kara ext4_quota_off_umount(sb); 1198e0ccfd95SChristoph Hellwig 1199c92dc856SJan Kara flush_work(&sbi->s_error_work); 12002e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 120102f310fcSJan Kara ext4_release_orphan_info(sb); 12024c0425ffSMingming Cao 12035e47868fSRitesh Harjani /* 12045e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 12055e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 12065e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 12075e47868fSRitesh Harjani */ 12085e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 12095e47868fSRitesh Harjani 12100390131bSFrank Mayhar if (sbi->s_journal) { 121197abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1212ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 121347b4a50bSJan Kara sbi->s_journal = NULL; 1214878520acSTheodore Ts'o if ((err < 0) && !aborted) { 121554d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12160390131bSFrank Mayhar } 1217878520acSTheodore Ts'o } 1218d4edac31SJosef Bacik 1219d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12209105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1221d4edac31SJosef Bacik ext4_release_system_zone(sb); 1222d4edac31SJosef Bacik ext4_mb_release(sb); 1223d4edac31SJosef Bacik ext4_ext_release(sb); 1224d4edac31SJosef Bacik 1225bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1226e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 122702f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1228ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1229ac27a0ecSDave Kleikamp } 1230bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12314392fbc4SJan Kara ext4_commit_super(sb); 1232a8e25a83SArtem Bityutskiy 12331d0c3924STheodore Ts'o rcu_read_lock(); 12341d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1235ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12361d0c3924STheodore Ts'o brelse(group_desc[i]); 12371d0c3924STheodore Ts'o kvfree(group_desc); 12387c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12397c990728SSuraj Jitindar Singh if (flex_groups) { 12407c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12417c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12427c990728SSuraj Jitindar Singh kvfree(flex_groups); 12437c990728SSuraj Jitindar Singh } 12441d0c3924STheodore Ts'o rcu_read_unlock(); 124557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1246ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1247ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 124857042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1249efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1250bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1251ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1252a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 125333458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1254ac27a0ecSDave Kleikamp #endif 1255ac27a0ecSDave Kleikamp 1256ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1257ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1258ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1259ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1260ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1261ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1262837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1263ac27a0ecSDave Kleikamp 126489d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1265f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1266ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1267ac27a0ecSDave Kleikamp /* 1268ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1269ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1270ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1271ac27a0ecSDave Kleikamp */ 1272ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1273ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1274617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1275ac27a0ecSDave Kleikamp } 127650c15df6SChengguang Xu 1277dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1278dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 127950c15df6SChengguang Xu 128047387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 128147387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 128250c15df6SChengguang Xu 1283618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1284618f0031SPavel Skripkin 12859060dd2cSEric Sandeen brelse(sbi->s_sbh); 1286ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12873197ebdbSTheodore Ts'o /* 12883197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12893197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12903197ebdbSTheodore Ts'o */ 12913197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12923197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 12930441984aSDarrick J. Wong if (sbi->s_chksum_driver) 12940441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1295705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 12965e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1297ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 1298c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1299f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1300c83ad55eSGabriel Krisman Bertazi #endif 1301ac27a0ecSDave Kleikamp kfree(sbi); 1302ac27a0ecSDave Kleikamp } 1303ac27a0ecSDave Kleikamp 1304e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1305ac27a0ecSDave Kleikamp 1306ac27a0ecSDave Kleikamp /* 1307ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1308ac27a0ecSDave Kleikamp */ 1309617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1310ac27a0ecSDave Kleikamp { 1311617ba13bSMingming Cao struct ext4_inode_info *ei; 1312ac27a0ecSDave Kleikamp 1313e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1314ac27a0ecSDave Kleikamp if (!ei) 1315ac27a0ecSDave Kleikamp return NULL; 13160b8e58a1SAndreas Dilger 1317ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1318202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1319c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 132027bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1321c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13229a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13239a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1324edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1325eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1326edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1327dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1328d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1329d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13301dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1331a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1332a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 133396c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1334a9e7f447SDmitry Monakhov #endif 13358aefcd55STheodore Ts'o ei->jinode = NULL; 13362e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1337744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1338b436b9beSJan Kara ei->i_sync_tid = 0; 1339b436b9beSJan Kara ei->i_datasync_tid = 0; 1340e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13412e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1342aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1343aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1344ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1345ac27a0ecSDave Kleikamp } 1346ac27a0ecSDave Kleikamp 13477ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13487ff9c073STheodore Ts'o { 13497ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13507ff9c073STheodore Ts'o 135129b3692eSEric Biggers if (!drop) 135229b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 135329b3692eSEric Biggers 13547ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13557ff9c073STheodore Ts'o return drop; 13567ff9c073STheodore Ts'o } 13577ff9c073STheodore Ts'o 135894053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1359fa0d7e3dSNick Piggin { 13602c58d548SEric Biggers fscrypt_free_inode(inode); 1361aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1362aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1363aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1364aa75f4d3SHarshad Shirwadkar } 1365fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1366fa0d7e3dSNick Piggin } 1367fa0d7e3dSNick Piggin 1368617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1369ac27a0ecSDave Kleikamp { 13709f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1371b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1372b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1373b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13749f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13759f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13769f7dd93dSVasily Averin true); 13779f7dd93dSVasily Averin dump_stack(); 13789f7dd93dSVasily Averin } 13796fed8395SJeffle Xu 13806fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13816fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13826fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13836fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13846fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1385ac27a0ecSDave Kleikamp } 1386ac27a0ecSDave Kleikamp 138751cc5068SAlexey Dobriyan static void init_once(void *foo) 1388ac27a0ecSDave Kleikamp { 1389617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1390ac27a0ecSDave Kleikamp 1391ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1392ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 13930e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1394ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1395aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1396ac27a0ecSDave Kleikamp } 1397ac27a0ecSDave Kleikamp 1398e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1399ac27a0ecSDave Kleikamp { 1400f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1401f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1402f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1403f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1404f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1405f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 140620c2df83SPaul Mundt init_once); 1407617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1408ac27a0ecSDave Kleikamp return -ENOMEM; 1409ac27a0ecSDave Kleikamp return 0; 1410ac27a0ecSDave Kleikamp } 1411ac27a0ecSDave Kleikamp 1412ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1413ac27a0ecSDave Kleikamp { 14148c0a8537SKirill A. Shutemov /* 14158c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14168c0a8537SKirill A. Shutemov * destroy cache. 14178c0a8537SKirill A. Shutemov */ 14188c0a8537SKirill A. Shutemov rcu_barrier(); 1419617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1420ac27a0ecSDave Kleikamp } 1421ac27a0ecSDave Kleikamp 14220930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1423ac27a0ecSDave Kleikamp { 1424aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14250930fcc1SAl Viro invalidate_inode_buffers(inode); 1426dbd5768fSJan Kara clear_inode(inode); 142727bc446eSbrookxu ext4_discard_preallocations(inode, 0); 142851865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1429f4c2d372SJan Kara dquot_drop(inode); 14308aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14318aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14328aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14338aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14348aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14358aefcd55STheodore Ts'o } 14363d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1437c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1438ac27a0ecSDave Kleikamp } 1439ac27a0ecSDave Kleikamp 14401b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14411b961ac0SChristoph Hellwig u64 ino, u32 generation) 1442ac27a0ecSDave Kleikamp { 1443ac27a0ecSDave Kleikamp struct inode *inode; 1444ac27a0ecSDave Kleikamp 14458a363970STheodore Ts'o /* 1446ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1447ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1448ac27a0ecSDave Kleikamp */ 14498a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14501d1fe1eeSDavid Howells if (IS_ERR(inode)) 14511d1fe1eeSDavid Howells return ERR_CAST(inode); 14521d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1453ac27a0ecSDave Kleikamp iput(inode); 1454ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1455ac27a0ecSDave Kleikamp } 14561b961ac0SChristoph Hellwig 14571b961ac0SChristoph Hellwig return inode; 1458ac27a0ecSDave Kleikamp } 14591b961ac0SChristoph Hellwig 14601b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14611b961ac0SChristoph Hellwig int fh_len, int fh_type) 14621b961ac0SChristoph Hellwig { 14631b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14641b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14651b961ac0SChristoph Hellwig } 14661b961ac0SChristoph Hellwig 14671b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14681b961ac0SChristoph Hellwig int fh_len, int fh_type) 14691b961ac0SChristoph Hellwig { 14701b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14711b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1472ac27a0ecSDave Kleikamp } 1473ac27a0ecSDave Kleikamp 1474fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1475fde87268STheodore Ts'o { 1476fde87268STheodore Ts'o struct writeback_control wbc = { 1477fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1478fde87268STheodore Ts'o }; 1479fde87268STheodore Ts'o 1480fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1481fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1482fde87268STheodore Ts'o } 1483fde87268STheodore Ts'o 1484643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1485a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1486a7550b30SJaegeuk Kim { 1487a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1488a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1489a7550b30SJaegeuk Kim } 1490a7550b30SJaegeuk Kim 1491a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1492a7550b30SJaegeuk Kim void *fs_data) 1493a7550b30SJaegeuk Kim { 14942f8f5e76SEric Biggers handle_t *handle = fs_data; 1495c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1496a7550b30SJaegeuk Kim 14979ce0151aSEric Biggers /* 14989ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 14999ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 15009ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 15019ce0151aSEric Biggers * the filename "lost+found" itself. 15029ce0151aSEric Biggers */ 15039ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 15049ce0151aSEric Biggers return -EPERM; 1505a7550b30SJaegeuk Kim 15067d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 15077d3e06a8SRoss Zwisler return -EINVAL; 15087d3e06a8SRoss Zwisler 1509b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1510b383a73fSIra Weiny return -EOPNOTSUPP; 1511b383a73fSIra Weiny 151294840e3cSEric Biggers res = ext4_convert_inline_data(inode); 151394840e3cSEric Biggers if (res) 151494840e3cSEric Biggers return res; 151594840e3cSEric Biggers 15162f8f5e76SEric Biggers /* 15172f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 15182f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 15192f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15202f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15212f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15222f8f5e76SEric Biggers */ 15232f8f5e76SEric Biggers 15242f8f5e76SEric Biggers if (handle) { 15252f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15262f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15272f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15282f8f5e76SEric Biggers ctx, len, 0); 1529a7550b30SJaegeuk Kim if (!res) { 1530a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1531a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1532a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1533a3caa24bSJan Kara /* 15342ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15352ee6a576SEric Biggers * S_DAX may be disabled 1536a3caa24bSJan Kara */ 1537043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1538a7550b30SJaegeuk Kim } 1539a7550b30SJaegeuk Kim return res; 1540a7550b30SJaegeuk Kim } 1541a7550b30SJaegeuk Kim 1542b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1543b8cb5a54STahsin Erdogan if (res) 1544b8cb5a54STahsin Erdogan return res; 15452f8f5e76SEric Biggers retry: 1546af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1547af65207cSTahsin Erdogan &credits); 1548dec214d0STahsin Erdogan if (res) 1549dec214d0STahsin Erdogan return res; 1550dec214d0STahsin Erdogan 1551c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1552a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1553a7550b30SJaegeuk Kim return PTR_ERR(handle); 1554a7550b30SJaegeuk Kim 15552f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15562f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15572f8f5e76SEric Biggers ctx, len, 0); 1558a7550b30SJaegeuk Kim if (!res) { 1559a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15602ee6a576SEric Biggers /* 15612ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15622ee6a576SEric Biggers * S_DAX may be disabled 15632ee6a576SEric Biggers */ 1564043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1565a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1566a7550b30SJaegeuk Kim if (res) 1567a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1568a7550b30SJaegeuk Kim } 1569a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15702f8f5e76SEric Biggers 15712f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15722f8f5e76SEric Biggers goto retry; 1573a7550b30SJaegeuk Kim if (!res) 1574a7550b30SJaegeuk Kim res = res2; 1575a7550b30SJaegeuk Kim return res; 1576a7550b30SJaegeuk Kim } 1577a7550b30SJaegeuk Kim 1578ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1579a7550b30SJaegeuk Kim { 1580ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1581a7550b30SJaegeuk Kim } 1582a7550b30SJaegeuk Kim 1583b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1584b925acb8SEric Biggers { 1585b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1586b925acb8SEric Biggers } 1587b925acb8SEric Biggers 1588b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1589b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1590b925acb8SEric Biggers { 1591b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1592b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1593b925acb8SEric Biggers } 1594b925acb8SEric Biggers 15956f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1596a5d431efSEric Biggers .key_prefix = "ext4:", 1597a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1598a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1599ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1600a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1601b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1602b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1603a7550b30SJaegeuk Kim }; 1604a7550b30SJaegeuk Kim #endif 1605a7550b30SJaegeuk Kim 1606ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1607d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1608689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1609ac27a0ecSDave Kleikamp 1610617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1611617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1612617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1613617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1614617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 16156f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 16168c54ca9cSAl Viro const struct path *path); 1617617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1618ac27a0ecSDave Kleikamp size_t len, loff_t off); 1619617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1620ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16217c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16227c319d32SAditya Kali unsigned int flags); 1623ac27a0ecSDave Kleikamp 162496c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 162596c7e0d9SJan Kara { 162696c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 162796c7e0d9SJan Kara } 162896c7e0d9SJan Kara 162961e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 163060e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1631617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1632617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1633617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1634617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1635a5b5ee32SJan Kara .write_info = ext4_write_info, 1636a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1637a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1638040cb378SLi Xi .get_projid = ext4_get_projid, 16397a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1640ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1641ac27a0ecSDave Kleikamp }; 1642ac27a0ecSDave Kleikamp 16430d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1644617ba13bSMingming Cao .quota_on = ext4_quota_on, 1645ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1646287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16470a240339SJan Kara .get_state = dquot_get_state, 1648287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1649287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16506332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16516332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1652ac27a0ecSDave Kleikamp }; 1653ac27a0ecSDave Kleikamp #endif 1654ac27a0ecSDave Kleikamp 1655ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1656617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 165794053139SAl Viro .free_inode = ext4_free_in_core_inode, 1658617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1659617ba13bSMingming Cao .write_inode = ext4_write_inode, 1660617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16617ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16620930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1663617ba13bSMingming Cao .put_super = ext4_put_super, 1664617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1665c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1666c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1667617ba13bSMingming Cao .statfs = ext4_statfs, 1668617ba13bSMingming Cao .remount_fs = ext4_remount, 1669617ba13bSMingming Cao .show_options = ext4_show_options, 1670ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1671617ba13bSMingming Cao .quota_read = ext4_quota_read, 1672617ba13bSMingming Cao .quota_write = ext4_quota_write, 167396c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1674ac27a0ecSDave Kleikamp #endif 1675ac27a0ecSDave Kleikamp }; 1676ac27a0ecSDave Kleikamp 167739655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16781b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16791b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1680617ba13bSMingming Cao .get_parent = ext4_get_parent, 1681fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1682ac27a0ecSDave Kleikamp }; 1683ac27a0ecSDave Kleikamp 1684ac27a0ecSDave Kleikamp enum { 1685ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1686ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 168772578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1688ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 168972578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1690ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1691ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1692ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16936ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16944f74d15fSEric Biggers Opt_inlinecrypt, 1695ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 16965a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1697ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16989cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 16999cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1700327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1701327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1702670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 17031449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 17045328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1705744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1706fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1707cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 170821175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1709e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 17108016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 171199c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 17128016e29fSHarshad Shirwadkar #endif 1713ac27a0ecSDave Kleikamp }; 1714ac27a0ecSDave Kleikamp 1715e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1716e5a185c2SLukas Czerner {"continue", Opt_err_cont}, 1717e5a185c2SLukas Czerner {"panic", Opt_err_panic}, 1718e5a185c2SLukas Czerner {"remount-ro", Opt_err_ro}, 1719e5a185c2SLukas Czerner {} 1720e5a185c2SLukas Czerner }; 1721e5a185c2SLukas Czerner 1722e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1723e5a185c2SLukas Czerner {"journal", Opt_data_journal}, 1724e5a185c2SLukas Czerner {"ordered", Opt_data_ordered}, 1725e5a185c2SLukas Czerner {"writeback", Opt_data_writeback}, 1726e5a185c2SLukas Czerner {} 1727e5a185c2SLukas Czerner }; 1728e5a185c2SLukas Czerner 1729e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1730e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1731e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1732e5a185c2SLukas Czerner {} 1733e5a185c2SLukas Czerner }; 1734e5a185c2SLukas Czerner 1735e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1736e5a185c2SLukas Czerner {"vfsold", Opt_jqfmt_vfsold}, 1737e5a185c2SLukas Czerner {"vfsv0", Opt_jqfmt_vfsv0}, 1738e5a185c2SLukas Czerner {"vfsv1", Opt_jqfmt_vfsv1}, 1739e5a185c2SLukas Czerner {} 1740e5a185c2SLukas Czerner }; 1741e5a185c2SLukas Czerner 1742e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1743e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1744e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1745e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1746e5a185c2SLukas Czerner {} 1747e5a185c2SLukas Czerner }; 1748e5a185c2SLukas Czerner 1749e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1750e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1751e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1752e5a185c2SLukas Czerner 1753e5a185c2SLukas Czerner /* 1754e5a185c2SLukas Czerner * Mount option specification 1755e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1756e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1757e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1758e5a185c2SLukas Czerner * separate for now. 1759e5a185c2SLukas Czerner */ 1760e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1761e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1762e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1763e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1764e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1765e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1766e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1767e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1768e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1769e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1770e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1771e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1772e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1773e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1774e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1775e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1776e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1777e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1778e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1779e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1780e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1781e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1782e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1783e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1784e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1785e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1786e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1787e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1788e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1789e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1790e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1791e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1792e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1793e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1794e5a185c2SLukas Czerner ext4_param_data_err), 1795e5a185c2SLukas Czerner fsparam_string_empty 1796e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1797e5a185c2SLukas Czerner fsparam_string_empty 1798e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1799e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1800e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1801e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1802e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1803e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1804e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1805e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1806e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1807e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1808e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1809e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1810e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1811e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1812e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1813e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1814e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1815e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1816e5a185c2SLukas Czerner fsparam_flag ("lazytime", Opt_lazytime), 1817e5a185c2SLukas Czerner fsparam_flag ("nolazytime", Opt_nolazytime), 1818e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1819e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1820e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1821e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1822e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1823e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1824e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1825e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1826e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1827e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1828e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1829e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1830e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1831e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1832e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1833e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1834e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1835e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1836e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1837e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1838e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1839e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1840e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1841e5a185c2SLukas Czerner #endif 1842e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1843e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1844e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1845e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1846e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1847e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1848e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1849e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1850e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1851e5a185c2SLukas Czerner Opt_removed), 1852e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1853e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1854e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1855e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1856e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1857e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1858e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1859e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1860e5a185c2SLukas Czerner {} 1861e5a185c2SLukas Czerner }; 1862e5a185c2SLukas Czerner 1863a447c093SSteven Whitehouse static const match_table_t tokens = { 1864ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1865ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1866ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1867ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1868ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1869ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1870ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1871ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1872ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1873ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1874ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1875ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1876ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1877ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 187872578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 187972578c33STheodore Ts'o {Opt_removed, "orlov"}, 1880ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1881ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1882ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1883ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1884e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 18855a916be1STheodore Ts'o {Opt_noload, "noload"}, 188672578c33STheodore Ts'o {Opt_removed, "nobh"}, 188772578c33STheodore Ts'o {Opt_removed, "bh"}, 1888ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 188930773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 189030773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1891ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1892ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1893818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1894c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1895818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1896ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1897ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1898ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1899ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 19005bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 19015bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1902ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1903ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1904ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1905ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1906ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1907ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 19085a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1909ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1910ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1911ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1912ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 191349da9392SJan Kara {Opt_prjquota, "prjquota"}, 1914ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 191506705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 191606705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 191725ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1918923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 19199cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 19209cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 19219cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1922c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 192364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1924327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1925327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1926a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1927a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1928670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1929dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 193036ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 193136ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 19326fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 19336fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1934240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1935b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1936afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 193706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 193806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1939744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1940244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1941744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 19425328e635SEric Sandeen {Opt_discard, "discard"}, 19435328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1944fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1945fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1946fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 19478016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 194899c880deSHarshad Shirwadkar {Opt_fc_debug_force, "fc_debug_force"}, 19498016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"}, 19508016e29fSHarshad Shirwadkar #endif 1951df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1952ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 19536ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 19544f74d15fSEric Biggers {Opt_inlinecrypt, "inlinecrypt"}, 1955cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1956cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 195721175ca4SHarshad Shirwadkar {Opt_removed, "prefetch_block_bitmaps"}, 195821175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, 1959196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, 1960c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1961c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1962c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1963c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1964c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1965f3f12faaSJosef Bacik {Opt_err, NULL}, 1966ac27a0ecSDave Kleikamp }; 1967ac27a0ecSDave Kleikamp 1968b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1969196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1970196e402aSHarshad Shirwadkar 1971d6006186SEric Biggers static const char deprecated_msg[] = 1972d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1973437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1974b3881f74STheodore Ts'o 197526092bf5STheodore Ts'o #define MOPT_SET 0x0001 197626092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 197726092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 197826092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 197926092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 198026092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 198126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 198226092bf5STheodore Ts'o #define MOPT_Q 0 198326092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 198426092bf5STheodore Ts'o #else 198526092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 198626092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 198726092bf5STheodore Ts'o #endif 198826092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 19898dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 19908dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 19918dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1992ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 19939cb20f94SIra Weiny #define MOPT_SKIP 0x0800 1994995a3ed6SHarshad Shirwadkar #define MOPT_2 0x1000 199526092bf5STheodore Ts'o 199626092bf5STheodore Ts'o static const struct mount_opts { 199726092bf5STheodore Ts'o int token; 199826092bf5STheodore Ts'o int mount_opt; 199926092bf5STheodore Ts'o int flags; 200026092bf5STheodore Ts'o } ext4_mount_opts[] = { 200126092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 200226092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 200326092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 200426092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 200526092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 200626092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 20078dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 20088dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 20098dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 20108dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 201126092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 201226092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 20138dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 20148dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20158dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 201659d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 2017327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 2018327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 2019c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 2020c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 20218dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 20221e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 202326092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 20248dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 20251e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20268dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 202726092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 202826092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 202926092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 20308dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 20317915a861SAles Novak MOPT_NO_EXT2}, 20328dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 20337915a861SAles Novak MOPT_NO_EXT2}, 203426092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 203526092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 203626092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 203726092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 203826092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 203926092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 204026092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 204126092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 204226092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 204326092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 20449cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 20459cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 20469cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 20479cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 20489cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 20499cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 20509cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 205126092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 20520efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 20530efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 20545ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 20555ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 20565ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 20578dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 20588dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 20598dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 20608dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 206126092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 206226092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 206326092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 206426092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 206526092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 206626092bf5STheodore Ts'o #else 206726092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 206826092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 206926092bf5STheodore Ts'o #endif 207026092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 207126092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 2072670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 207326092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 207426092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 207526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 207626092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 207726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 207849da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 207949da9392SJan Kara MOPT_SET | MOPT_Q}, 208026092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 208149da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 208249da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 2083174fe5baSKaixu Xia {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING}, 2084174fe5baSKaixu Xia {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING}, 208526092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 208626092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 208726092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 208826092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 208926092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 2090df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 2091ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 2092cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 209321175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 20943d392b26STheodore Ts'o MOPT_SET}, 2095196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, 209699c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 20970f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 20980f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 20998016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, 0, MOPT_GTE0}, 21008016e29fSHarshad Shirwadkar #endif 210126092bf5STheodore Ts'o {Opt_err, 0, 0} 210226092bf5STheodore Ts'o }; 210326092bf5STheodore Ts'o 2104c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 2105c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 2106c83ad55eSGabriel Krisman Bertazi __u16 magic; 2107c83ad55eSGabriel Krisman Bertazi char *name; 2108c83ad55eSGabriel Krisman Bertazi char *version; 2109c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 2110c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 2111c83ad55eSGabriel Krisman Bertazi }; 2112c83ad55eSGabriel Krisman Bertazi 2113c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 2114c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 2115c83ad55eSGabriel Krisman Bertazi __u16 *flags) 2116c83ad55eSGabriel Krisman Bertazi { 2117c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 2118c83ad55eSGabriel Krisman Bertazi int i; 2119c83ad55eSGabriel Krisman Bertazi 2120c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 2121c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 2122c83ad55eSGabriel Krisman Bertazi break; 2123c83ad55eSGabriel Krisman Bertazi 2124c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 2125c83ad55eSGabriel Krisman Bertazi return -EINVAL; 2126c83ad55eSGabriel Krisman Bertazi 2127c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 2128c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 2129c83ad55eSGabriel Krisman Bertazi 2130c83ad55eSGabriel Krisman Bertazi return 0; 2131c83ad55eSGabriel Krisman Bertazi } 2132c83ad55eSGabriel Krisman Bertazi #endif 2133c83ad55eSGabriel Krisman Bertazi 21346e47a3ccSLukas Czerner static int ext4_set_test_dummy_encryption(struct super_block *sb, char *arg) 2135ed318a6cSEric Biggers { 2136ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 2137ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 2138ed318a6cSEric Biggers int err; 2139ed318a6cSEric Biggers 21406e47a3ccSLukas Czerner err = fscrypt_set_test_dummy_encryption(sb, arg, 2141ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2142ed318a6cSEric Biggers if (err) { 2143ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 21446e47a3ccSLukas Czerner "Error while setting test dummy encryption [%d]", err); 21456e47a3ccSLukas Czerner return err; 2146ed318a6cSEric Biggers } 2147ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2148ed318a6cSEric Biggers #endif 21496e47a3ccSLukas Czerner return 0; 2150ed318a6cSEric Biggers } 2151ed318a6cSEric Biggers 21526e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 21536e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 21546e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 21556e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 21566e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 21576e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 21586e47a3ccSLukas Czerner #define EXT4_SPEC_DUMMY_ENCRYPTION (1 << 6) 21596e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 21606e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 21616e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 21626e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 21636e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 21646e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 21656e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 21666e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 21676e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 21686e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 21696e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 21707edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 21716e47a3ccSLukas Czerner 2172461c3af0SLukas Czerner struct ext4_fs_context { 2173e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 21746e47a3ccSLukas Czerner char *test_dummy_enc_arg; 2175e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 2176196e402aSHarshad Shirwadkar int mb_optimize_scan; 21776e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 21786e47a3ccSLukas Czerner int s_fc_debug_max_replay; 21796e47a3ccSLukas Czerner #endif 21806e47a3ccSLukas Czerner unsigned short qname_spec; 21816e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 21826e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 21836e47a3ccSLukas Czerner unsigned long journal_devnum; 21846e47a3ccSLukas Czerner unsigned long s_commit_interval; 21856e47a3ccSLukas Czerner unsigned long s_stripe; 21866e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 21876e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 21886e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 21896e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 21906e47a3ccSLukas Czerner unsigned int journal_ioprio; 21916e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 21926e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 21936e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 21946e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 21956e47a3ccSLukas Czerner unsigned int vals_s_mount_flags; 21966e47a3ccSLukas Czerner unsigned int mask_s_mount_flags; 2197b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 21986e47a3ccSLukas Czerner unsigned int spec; 21996e47a3ccSLukas Czerner u32 s_max_batch_time; 22006e47a3ccSLukas Czerner u32 s_min_batch_time; 22016e47a3ccSLukas Czerner kuid_t s_resuid; 22026e47a3ccSLukas Czerner kgid_t s_resgid; 22037edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 2204b237e304SHarshad Shirwadkar }; 2205b237e304SHarshad Shirwadkar 2206e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2207e6e268cbSLukas Czerner /* 2208e6e268cbSLukas Czerner * Note the name of the specified quota file. 2209e6e268cbSLukas Czerner */ 2210e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2211e6e268cbSLukas Czerner struct fs_parameter *param) 2212e6e268cbSLukas Czerner { 2213e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2214e6e268cbSLukas Czerner char *qname; 2215e6e268cbSLukas Czerner 2216e6e268cbSLukas Czerner if (param->size < 1) { 2217e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2218e6e268cbSLukas Czerner return -EINVAL; 2219e6e268cbSLukas Czerner } 2220e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2221e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2222e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2223e6e268cbSLukas Czerner return -EINVAL; 2224e6e268cbSLukas Czerner } 2225e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2226e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2227e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2228e6e268cbSLukas Czerner "%s quota file already specified", 2229e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2230e6e268cbSLukas Czerner return -EINVAL; 2231e6e268cbSLukas Czerner } 2232e6e268cbSLukas Czerner return 0; 2233e6e268cbSLukas Czerner } 2234e6e268cbSLukas Czerner 2235e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2236e6e268cbSLukas Czerner if (!qname) { 2237e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2238e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2239e6e268cbSLukas Czerner return -ENOMEM; 2240e6e268cbSLukas Czerner } 2241e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2242e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 22436e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2244e6e268cbSLukas Czerner return 0; 2245e6e268cbSLukas Czerner } 2246e6e268cbSLukas Czerner 2247e6e268cbSLukas Czerner /* 2248e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2249e6e268cbSLukas Czerner */ 2250e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2251e6e268cbSLukas Czerner { 2252e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2253e6e268cbSLukas Czerner 2254e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2255e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2256e6e268cbSLukas Czerner 2257e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2258e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 22596e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2260e6e268cbSLukas Czerner return 0; 2261e6e268cbSLukas Czerner } 2262e6e268cbSLukas Czerner #endif 2263e6e268cbSLukas Czerner 22646e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 22656e47a3ccSLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, int flag)\ 22666e47a3ccSLukas Czerner { \ 22676e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 22686e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 22696e47a3ccSLukas Czerner } \ 22706e47a3ccSLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, int flag)\ 22716e47a3ccSLukas Czerner { \ 22726e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 22736e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 22746e47a3ccSLukas Czerner } \ 22756e47a3ccSLukas Czerner static inline bool ctx_test_##name(struct ext4_fs_context *ctx, int flag)\ 22766e47a3ccSLukas Czerner { \ 22776e47a3ccSLukas Czerner return ((ctx->vals_s_##name & flag) != 0); \ 22786e47a3ccSLukas Czerner } \ 22796e47a3ccSLukas Czerner 22806e47a3ccSLukas Czerner EXT4_SET_CTX(flags); 22816e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 22826e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 22836e47a3ccSLukas Czerner EXT4_SET_CTX(mount_flags); 22846e47a3ccSLukas Czerner 2285*02f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 228626092bf5STheodore Ts'o { 2287461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2288461c3af0SLukas Czerner struct fs_parse_result result; 228926092bf5STheodore Ts'o const struct mount_opts *m; 2290461c3af0SLukas Czerner int is_remount; 229108cefc7aSEric W. Biederman kuid_t uid; 229208cefc7aSEric W. Biederman kgid_t gid; 2293461c3af0SLukas Czerner int token; 2294461c3af0SLukas Czerner 2295461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2296461c3af0SLukas Czerner if (token < 0) 2297461c3af0SLukas Czerner return token; 2298461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 229926092bf5STheodore Ts'o 230057f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2301461c3af0SLukas Czerner if (token == Opt_usrjquota) { 2302461c3af0SLukas Czerner if (!*param->string) 2303e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2304461c3af0SLukas Czerner else 2305e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2306461c3af0SLukas Czerner } else if (token == Opt_grpjquota) { 2307461c3af0SLukas Czerner if (!*param->string) 2308e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2309461c3af0SLukas Czerner else 2310e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 2311461c3af0SLukas Czerner } 231257f73c2cSTheodore Ts'o #endif 231326092bf5STheodore Ts'o switch (token) { 2314f7048605STheodore Ts'o case Opt_noacl: 2315f7048605STheodore Ts'o case Opt_nouser_xattr: 2316da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "3.5"); 2317f7048605STheodore Ts'o break; 231826092bf5STheodore Ts'o case Opt_sb: 23197edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 23207edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 23217edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 23227edfd85bSLukas Czerner } else { 23237edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 23247edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 23257edfd85bSLukas Czerner } 2326*02f960f8SLukas Czerner return 0; 232726092bf5STheodore Ts'o case Opt_removed: 2328da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2329461c3af0SLukas Czerner param->key); 2330*02f960f8SLukas Czerner return 0; 233126092bf5STheodore Ts'o case Opt_abort: 23326e47a3ccSLukas Czerner ctx_set_mount_flags(ctx, EXT4_MF_FS_ABORTED); 2333*02f960f8SLukas Czerner return 0; 233426092bf5STheodore Ts'o case Opt_i_version: 23356e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_I_VERSION); 2336*02f960f8SLukas Czerner return 0; 2337a26f4992STheodore Ts'o case Opt_lazytime: 23386e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_LAZYTIME); 2339*02f960f8SLukas Czerner return 0; 2340a26f4992STheodore Ts'o case Opt_nolazytime: 23416e47a3ccSLukas Czerner ctx_clear_flags(ctx, SB_LAZYTIME); 2342*02f960f8SLukas Czerner return 0; 23434f74d15fSEric Biggers case Opt_inlinecrypt: 23444f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 23456e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 23464f74d15fSEric Biggers #else 2347da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 23484f74d15fSEric Biggers #endif 2349*02f960f8SLukas Czerner return 0; 2350461c3af0SLukas Czerner case Opt_errors: 2351461c3af0SLukas Czerner case Opt_data: 2352461c3af0SLukas Czerner case Opt_data_err: 2353461c3af0SLukas Czerner case Opt_jqfmt: 2354461c3af0SLukas Czerner case Opt_dax_type: 2355461c3af0SLukas Czerner token = result.uint_32; 235626092bf5STheodore Ts'o } 235726092bf5STheodore Ts'o 23585f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 23595f3633e3SJan Kara if (token == m->token) 23605f3633e3SJan Kara break; 23615f3633e3SJan Kara 2362b6bd2435SLukas Czerner ctx->opt_flags |= m->flags; 2363b6bd2435SLukas Czerner 23645f3633e3SJan Kara if (m->token == Opt_err) { 2365da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Unrecognized mount option \"%s\" " 2366461c3af0SLukas Czerner "or missing value", param->key); 2367da812f61SLukas Czerner return -EINVAL; 23685f3633e3SJan Kara } 23695f3633e3SJan Kara 2370c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 2371c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 23726e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 23731e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 23746e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, 23756e47a3ccSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2376c93cf2d7SDmitry Monakhov } else 2377da812f61SLukas Czerner return -EINVAL; 2378c93cf2d7SDmitry Monakhov } 237926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 23806e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 238126092bf5STheodore Ts'o 238226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 2383da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2384461c3af0SLukas Czerner param->key); 238526092bf5STheodore Ts'o } else if (token == Opt_commit) { 2386461c3af0SLukas Czerner if (result.uint_32 == 0) 23876e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2388461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2389da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 23909ba55543Szhangyi (F) "Invalid commit interval %d, " 23919ba55543Szhangyi (F) "must be smaller than %d", 2392461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2393da812f61SLukas Czerner return -EINVAL; 23949ba55543Szhangyi (F) } 23956e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 23966e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2397670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 23986e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2399da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2400461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2401da812f61SLukas Czerner return -EINVAL; 24029803387cSTheodore Ts'o } 24036e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 24046e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 240526092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 24066e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 24076e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 240826092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 24096e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 24106e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 241126092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2412461c3af0SLukas Czerner if (result.uint_32 && 2413461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2414461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2415da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2416e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2417e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2418da812f61SLukas Czerner return -EINVAL; 241926092bf5STheodore Ts'o } 24206e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 24216e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 242226092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 24236e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 24246e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2425461c3af0SLukas Czerner if (param->type == fs_value_is_string) 24266e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 24276e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2428df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 24296e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 24306e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 24318016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 24328016e29fSHarshad Shirwadkar } else if (token == Opt_fc_debug_max_replay) { 24336e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 24346e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 24358016e29fSHarshad Shirwadkar #endif 243626092bf5STheodore Ts'o } else if (token == Opt_stripe) { 24376e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 24386e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 24390efb3b23SJan Kara } else if (token == Opt_resuid) { 2440461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 24410efb3b23SJan Kara if (!uid_valid(uid)) { 2442da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2443461c3af0SLukas Czerner result.uint_32); 2444da812f61SLukas Czerner return -EINVAL; 24450efb3b23SJan Kara } 24466e47a3ccSLukas Czerner ctx->s_resuid = uid; 24476e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 24480efb3b23SJan Kara } else if (token == Opt_resgid) { 2449461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 24500efb3b23SJan Kara if (!gid_valid(gid)) { 2451da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2452461c3af0SLukas Czerner result.uint_32); 2453da812f61SLukas Czerner return -EINVAL; 24540efb3b23SJan Kara } 24556e47a3ccSLukas Czerner ctx->s_resgid = gid; 24566e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 24570efb3b23SJan Kara } else if (token == Opt_journal_dev) { 24580efb3b23SJan Kara if (is_remount) { 2459da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 24600efb3b23SJan Kara "Cannot specify journal on remount"); 2461da812f61SLukas Czerner return -EINVAL; 24620efb3b23SJan Kara } 2463461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 24646e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2465ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2466ad4eec61SEric Sandeen struct inode *journal_inode; 2467ad4eec61SEric Sandeen struct path path; 2468ad4eec61SEric Sandeen int error; 2469ad4eec61SEric Sandeen 2470ad4eec61SEric Sandeen if (is_remount) { 2471da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2472ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2473da812f61SLukas Czerner return -EINVAL; 2474ad4eec61SEric Sandeen } 2475ad4eec61SEric Sandeen 2476461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2477ad4eec61SEric Sandeen if (error) { 2478da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2479461c3af0SLukas Czerner "journal device path"); 2480da812f61SLukas Czerner return -EINVAL; 2481ad4eec61SEric Sandeen } 2482ad4eec61SEric Sandeen 24832b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2484461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 24856e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2486ad4eec61SEric Sandeen path_put(&path); 24870efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 2488461c3af0SLukas Czerner if (result.uint_32 > 7) { 2489da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 24900efb3b23SJan Kara " (must be 0-7)"); 2491da812f61SLukas Czerner return -EINVAL; 24920efb3b23SJan Kara } 2493461c3af0SLukas Czerner ctx->journal_ioprio = 2494461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 24956e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 24966ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 24976e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 24986e47a3ccSLukas Czerner if (param->type == fs_value_is_flag) { 24996e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 25006e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = NULL; 2501*02f960f8SLukas Czerner return 0; 25026e47a3ccSLukas Czerner } 25036e47a3ccSLukas Czerner if (*param->string && 25046e47a3ccSLukas Czerner !(!strcmp(param->string, "v1") || 25056e47a3ccSLukas Czerner !strcmp(param->string, "v2"))) { 25066e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 25076e47a3ccSLukas Czerner "Value of option \"%s\" is unrecognized", 25086e47a3ccSLukas Czerner param->key); 2509da812f61SLukas Czerner return -EINVAL; 251026092bf5STheodore Ts'o } 25116e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 25126e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = kmemdup_nul(param->string, param->size, 25136e47a3ccSLukas Czerner GFP_KERNEL); 25146e47a3ccSLukas Czerner #else 25156e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 25166e47a3ccSLukas Czerner "Test dummy encryption mount option ignored"); 25176e47a3ccSLukas Czerner #endif 25186e47a3ccSLukas Czerner } else if (m->flags & MOPT_DATAJ) { 25196e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 25206e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 25216e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 252226092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 252326092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 2524e6e268cbSLukas Czerner ctx->s_jquota_fmt = m->mount_opt; 25256e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 252626092bf5STheodore Ts'o #endif 25279cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 25289cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2529ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 25309cb20f94SIra Weiny switch (token) { 25319cb20f94SIra Weiny case Opt_dax: 25329cb20f94SIra Weiny case Opt_dax_always: 25336e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 25346e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 25359cb20f94SIra Weiny break; 25369cb20f94SIra Weiny case Opt_dax_never: 25376e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 25386e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 25399cb20f94SIra Weiny break; 25409cb20f94SIra Weiny case Opt_dax_inode: 25416e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 25426e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 25439cb20f94SIra Weiny /* Strictly for printing options */ 25446e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 25459cb20f94SIra Weiny break; 25469cb20f94SIra Weiny } 2547ef83b6e8SDan Williams #else 2548da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 25496e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 25506e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 2551da812f61SLukas Czerner return -EINVAL; 2552923ae0ffSRoss Zwisler #endif 25537915a861SAles Novak } else if (token == Opt_data_err_abort) { 25546e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 25557915a861SAles Novak } else if (token == Opt_data_err_ignore) { 25566e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2557196e402aSHarshad Shirwadkar } else if (token == Opt_mb_optimize_scan) { 2558461c3af0SLukas Czerner if (result.int_32 != 0 && result.int_32 != 1) { 2559da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2560196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2561da812f61SLukas Czerner return -EINVAL; 2562196e402aSHarshad Shirwadkar } 2563461c3af0SLukas Czerner ctx->mb_optimize_scan = result.int_32; 256426092bf5STheodore Ts'o } else { 2565461c3af0SLukas Czerner unsigned int set = 0; 2566461c3af0SLukas Czerner 2567461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2568461c3af0SLukas Czerner result.uint_32 > 0) 2569461c3af0SLukas Czerner set = 1; 2570461c3af0SLukas Czerner 257126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2572461c3af0SLukas Czerner set = !set; 257326092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2574da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2575461c3af0SLukas Czerner "buggy handling of option %s", 2576461c3af0SLukas Czerner param->key); 257726092bf5STheodore Ts'o WARN_ON(1); 2578da812f61SLukas Czerner return -EINVAL; 257926092bf5STheodore Ts'o } 2580995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2581461c3af0SLukas Czerner if (set != 0) 25826e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2583995a3ed6SHarshad Shirwadkar else 25846e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2585995a3ed6SHarshad Shirwadkar } else { 2586461c3af0SLukas Czerner if (set != 0) 25876e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 258826092bf5STheodore Ts'o else 25896e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 259026092bf5STheodore Ts'o } 2591995a3ed6SHarshad Shirwadkar } 2592*02f960f8SLukas Czerner return 0; 259326092bf5STheodore Ts'o } 259426092bf5STheodore Ts'o 25957edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2596ac27a0ecSDave Kleikamp { 2597461c3af0SLukas Czerner struct fs_parameter param; 2598461c3af0SLukas Czerner int ret; 2599461c3af0SLukas Czerner char *key; 2600ac27a0ecSDave Kleikamp 2601ac27a0ecSDave Kleikamp if (!options) 26027edfd85bSLukas Czerner return 0; 2603461c3af0SLukas Czerner 2604461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2605461c3af0SLukas Czerner if (*key) { 2606461c3af0SLukas Czerner size_t v_len = 0; 2607461c3af0SLukas Czerner char *value = strchr(key, '='); 2608461c3af0SLukas Czerner 2609461c3af0SLukas Czerner param.type = fs_value_is_flag; 2610461c3af0SLukas Czerner param.string = NULL; 2611461c3af0SLukas Czerner 2612461c3af0SLukas Czerner if (value) { 2613461c3af0SLukas Czerner if (value == key) 2614ac27a0ecSDave Kleikamp continue; 2615461c3af0SLukas Czerner 2616461c3af0SLukas Czerner *value++ = 0; 2617461c3af0SLukas Czerner v_len = strlen(value); 2618461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2619461c3af0SLukas Czerner GFP_KERNEL); 2620461c3af0SLukas Czerner if (!param.string) 26217edfd85bSLukas Czerner return -ENOMEM; 2622461c3af0SLukas Czerner param.type = fs_value_is_string; 2623461c3af0SLukas Czerner } 2624461c3af0SLukas Czerner 2625461c3af0SLukas Czerner param.key = key; 2626461c3af0SLukas Czerner param.size = v_len; 2627461c3af0SLukas Czerner 2628*02f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2629461c3af0SLukas Czerner if (param.string) 2630461c3af0SLukas Czerner kfree(param.string); 2631461c3af0SLukas Czerner if (ret < 0) 26327edfd85bSLukas Czerner return ret; 2633ac27a0ecSDave Kleikamp } 2634461c3af0SLukas Czerner } 2635461c3af0SLukas Czerner 26367edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2637da812f61SLukas Czerner if (ret < 0) 26387edfd85bSLukas Czerner return ret; 26397edfd85bSLukas Czerner 26407edfd85bSLukas Czerner return 0; 26417edfd85bSLukas Czerner } 26427edfd85bSLukas Czerner 26437edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 26447edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 26457edfd85bSLukas Czerner { 26467edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 26477edfd85bSLukas Czerner char *s_mount_opts = NULL; 26487edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 26497edfd85bSLukas Czerner struct fs_context *fc = NULL; 26507edfd85bSLukas Czerner int ret = -ENOMEM; 26517edfd85bSLukas Czerner 26527edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2653da812f61SLukas Czerner return 0; 2654da812f61SLukas Czerner 26557edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 26567edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 26577edfd85bSLukas Czerner GFP_KERNEL); 26587edfd85bSLukas Czerner if (!s_mount_opts) 26597edfd85bSLukas Czerner return ret; 2660e6e268cbSLukas Czerner 26617edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 26627edfd85bSLukas Czerner if (!fc) 26637edfd85bSLukas Czerner goto out_free; 2664e6e268cbSLukas Czerner 26657edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 26667edfd85bSLukas Czerner if (!s_ctx) 26677edfd85bSLukas Czerner goto out_free; 26687edfd85bSLukas Czerner 26697edfd85bSLukas Czerner fc->fs_private = s_ctx; 26707edfd85bSLukas Czerner fc->s_fs_info = sbi; 26717edfd85bSLukas Czerner 26727edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 26737edfd85bSLukas Czerner if (ret < 0) 26747edfd85bSLukas Czerner goto parse_failed; 26757edfd85bSLukas Czerner 26767edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 26777edfd85bSLukas Czerner if (ret < 0) { 26787edfd85bSLukas Czerner parse_failed: 26797edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 26807edfd85bSLukas Czerner "failed to parse options in superblock: %s", 26817edfd85bSLukas Czerner s_mount_opts); 26827edfd85bSLukas Czerner ret = 0; 26837edfd85bSLukas Czerner goto out_free; 26847edfd85bSLukas Czerner } 26857edfd85bSLukas Czerner 26867edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 26877edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 26887edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 26897edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 26907edfd85bSLukas Czerner 26917edfd85bSLukas Czerner ret = ext4_apply_options(fc, sb); 26927edfd85bSLukas Czerner 26937edfd85bSLukas Czerner out_free: 26947edfd85bSLukas Czerner kfree(s_ctx); 26957edfd85bSLukas Czerner kfree(fc); 26967edfd85bSLukas Czerner kfree(s_mount_opts); 26977edfd85bSLukas Czerner return ret; 26984c94bff9SLukas Czerner } 26994c94bff9SLukas Czerner 2700e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2701e6e268cbSLukas Czerner struct super_block *sb) 2702e6e268cbSLukas Czerner { 2703e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 27046e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2705e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2706e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2707e6e268cbSLukas Czerner char *qname; 2708e6e268cbSLukas Czerner int i; 2709e6e268cbSLukas Czerner 27106e47a3ccSLukas Czerner if (quota_feature) 27116e47a3ccSLukas Czerner return; 27126e47a3ccSLukas Czerner 27136e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2714e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2715e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2716e6e268cbSLukas Czerner continue; 27176e47a3ccSLukas Czerner 2718e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 2719e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 2720e6e268cbSLukas Czerner kfree(sbi->s_qf_names[i]); 2721e6e268cbSLukas Czerner rcu_assign_pointer(sbi->s_qf_names[i], qname); 2722e6e268cbSLukas Czerner set_opt(sb, QUOTA); 2723e6e268cbSLukas Czerner } 27246e47a3ccSLukas Czerner } 27256e47a3ccSLukas Czerner 27266e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 27276e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2728e6e268cbSLukas Czerner #endif 2729e6e268cbSLukas Czerner } 2730e6e268cbSLukas Czerner 2731e6e268cbSLukas Czerner /* 2732e6e268cbSLukas Czerner * Check quota settings consistency. 2733e6e268cbSLukas Czerner */ 2734e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2735e6e268cbSLukas Czerner struct super_block *sb) 2736e6e268cbSLukas Czerner { 2737e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2738e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2739e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2740e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2741e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 27426e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 27436e47a3ccSLukas Czerner int quota_flags, i; 2744e6e268cbSLukas Czerner 27456e47a3ccSLukas Czerner /* 27466e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 27476e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 27486e47a3ccSLukas Czerner * to support legacy quotas in quota files. 27496e47a3ccSLukas Czerner */ 27506e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 27516e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 27526e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 27536e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 27546e47a3ccSLukas Czerner return -EINVAL; 27556e47a3ccSLukas Czerner } 27566e47a3ccSLukas Czerner 27576e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 27586e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 27596e47a3ccSLukas Czerner if (quota_loaded && 27606e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 27616e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 27626e47a3ccSLukas Czerner goto err_quota_change; 27636e47a3ccSLukas Czerner 27646e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2765e6e268cbSLukas Czerner 2766e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2767e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2768e6e268cbSLukas Czerner continue; 2769e6e268cbSLukas Czerner 27706e47a3ccSLukas Czerner if (quota_loaded && 27716e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2772e6e268cbSLukas Czerner goto err_jquota_change; 2773e6e268cbSLukas Czerner 2774e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 2775e6e268cbSLukas Czerner strcmp(sbi->s_qf_names[i], 2776e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2777e6e268cbSLukas Czerner goto err_jquota_specified; 2778e6e268cbSLukas Czerner } 27796e47a3ccSLukas Czerner 27806e47a3ccSLukas Czerner if (quota_feature) { 27816e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 27826e47a3ccSLukas Czerner "Journaled quota options ignored when " 27836e47a3ccSLukas Czerner "QUOTA feature is enabled"); 27846e47a3ccSLukas Czerner return 0; 27856e47a3ccSLukas Czerner } 2786e6e268cbSLukas Czerner } 2787e6e268cbSLukas Czerner 27886e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2789e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 27906e47a3ccSLukas Czerner goto err_jquota_change; 2791e6e268cbSLukas Czerner if (quota_feature) { 2792e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2793e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2794e6e268cbSLukas Czerner return 0; 2795e6e268cbSLukas Czerner } 2796e6e268cbSLukas Czerner } 27976e47a3ccSLukas Czerner 27986e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 27996e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 28006e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 28016e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 28026e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 28036e47a3ccSLukas Czerner 28046e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28056e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 28066e47a3ccSLukas Czerner 28076e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 28086e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 28096e47a3ccSLukas Czerner 28106e47a3ccSLukas Czerner if (usr_qf_name) { 28116e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 28126e47a3ccSLukas Czerner usrquota = false; 28136e47a3ccSLukas Czerner } 28146e47a3ccSLukas Czerner if (grp_qf_name) { 28156e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 28166e47a3ccSLukas Czerner grpquota = false; 28176e47a3ccSLukas Czerner } 28186e47a3ccSLukas Czerner 28196e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 28206e47a3ccSLukas Czerner if (usrquota || grpquota) { 28216e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 28226e47a3ccSLukas Czerner "format mixing"); 28236e47a3ccSLukas Czerner return -EINVAL; 28246e47a3ccSLukas Czerner } 28256e47a3ccSLukas Czerner 28266e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 28276e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 28286e47a3ccSLukas Czerner "not specified"); 28296e47a3ccSLukas Czerner return -EINVAL; 28306e47a3ccSLukas Czerner } 28316e47a3ccSLukas Czerner } 28326e47a3ccSLukas Czerner 2833e6e268cbSLukas Czerner return 0; 2834e6e268cbSLukas Czerner 2835e6e268cbSLukas Czerner err_quota_change: 2836e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2837e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2838e6e268cbSLukas Czerner return -EINVAL; 2839e6e268cbSLukas Czerner err_jquota_change: 2840e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2841e6e268cbSLukas Czerner "options when quota turned on"); 2842e6e268cbSLukas Czerner return -EINVAL; 2843e6e268cbSLukas Czerner err_jquota_specified: 2844e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2845e6e268cbSLukas Czerner QTYPE2NAME(i)); 2846e6e268cbSLukas Czerner return -EINVAL; 2847e6e268cbSLukas Czerner #else 2848e6e268cbSLukas Czerner return 0; 2849e6e268cbSLukas Czerner #endif 2850e6e268cbSLukas Czerner } 2851e6e268cbSLukas Czerner 2852b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2853b6bd2435SLukas Czerner struct super_block *sb) 2854b6bd2435SLukas Czerner { 2855b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28566e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28576e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 2858b6bd2435SLukas Czerner 2859b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2860b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2861b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2862b6bd2435SLukas Czerner return -EINVAL; 2863b6bd2435SLukas Czerner } 2864b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2865b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2866b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2867b6bd2435SLukas Czerner return -EINVAL; 2868b6bd2435SLukas Czerner } 2869b6bd2435SLukas Czerner 28706e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 28716e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 28726e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 28736e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 28746e47a3ccSLukas Czerner ctx->s_want_extra_isize); 28756e47a3ccSLukas Czerner return -EINVAL; 28766e47a3ccSLukas Czerner } 28776e47a3ccSLukas Czerner 28786e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 28796e47a3ccSLukas Czerner int blocksize = 28806e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 28816e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 28826e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 28836e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 28846e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 28856e47a3ccSLukas Czerner } 28866e47a3ccSLukas Czerner 28876e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 28886e47a3ccSLukas Czerner /* 28896e47a3ccSLukas Czerner * This mount option is just for testing, and it's not worthwhile to 28906e47a3ccSLukas Czerner * implement the extra complexity (e.g. RCU protection) that would be 28916e47a3ccSLukas Czerner * needed to allow it to be set or changed during remount. We do allow 28926e47a3ccSLukas Czerner * it to be specified during remount, but only if there is no change. 28936e47a3ccSLukas Czerner */ 28946e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) && 28956e47a3ccSLukas Czerner is_remount && !sbi->s_dummy_enc_policy.policy) { 28966e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 28976e47a3ccSLukas Czerner "Can't set test_dummy_encryption on remount"); 28986e47a3ccSLukas Czerner return -1; 28996e47a3ccSLukas Czerner } 29006e47a3ccSLukas Czerner #endif 29016e47a3ccSLukas Czerner 29026e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 29036e47a3ccSLukas Czerner if (!sbi->s_journal) { 29046e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 29056e47a3ccSLukas Czerner "Remounting file system with no journal " 29066e47a3ccSLukas Czerner "so ignoring journalled data option"); 29076e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 29086e47a3ccSLukas Czerner } else if (ctx->mask_s_mount_opt & EXT4_MOUNT_DATA_FLAGS) { 29096e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 29106e47a3ccSLukas Czerner "on remount"); 29116e47a3ccSLukas Czerner return -EINVAL; 29126e47a3ccSLukas Czerner } 29136e47a3ccSLukas Czerner } 29146e47a3ccSLukas Czerner 29156e47a3ccSLukas Czerner if (is_remount) { 29166e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 29176e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 29186e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 29196e47a3ccSLukas Czerner "both data=journal and dax"); 29206e47a3ccSLukas Czerner return -EINVAL; 29216e47a3ccSLukas Czerner } 29226e47a3ccSLukas Czerner 29236e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 29246e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 29256e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 29266e47a3ccSLukas Czerner fail_dax_change_remount: 29276e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 29286e47a3ccSLukas Czerner "dax mount option while remounting"); 29296e47a3ccSLukas Czerner return -EINVAL; 29306e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 29316e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 29326e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 29336e47a3ccSLukas Czerner goto fail_dax_change_remount; 29346e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 29356e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 29366e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 29376e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 29386e47a3ccSLukas Czerner goto fail_dax_change_remount; 29396e47a3ccSLukas Czerner } 29406e47a3ccSLukas Czerner } 29416e47a3ccSLukas Czerner 2942b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2943b6bd2435SLukas Czerner } 2944b6bd2435SLukas Czerner 29456e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb) 29466e47a3ccSLukas Czerner { 29476e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 29486e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 29496e47a3ccSLukas Czerner int ret = 0; 29506e47a3ccSLukas Czerner 29516e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 29526e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 29536e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 29546e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 29556e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 29566e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 29576e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 29586e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 29596e47a3ccSLukas Czerner 29606e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 29616e47a3ccSLukas Czerner APPLY(s_commit_interval); 29626e47a3ccSLukas Czerner APPLY(s_stripe); 29636e47a3ccSLukas Czerner APPLY(s_max_batch_time); 29646e47a3ccSLukas Czerner APPLY(s_min_batch_time); 29656e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 29666e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 29676e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 29686e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 29696e47a3ccSLukas Czerner APPLY(s_resgid); 29706e47a3ccSLukas Czerner APPLY(s_resuid); 29716e47a3ccSLukas Czerner 29726e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 29736e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 29746e47a3ccSLukas Czerner #endif 29756e47a3ccSLukas Czerner 29766e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 29776e47a3ccSLukas Czerner 29786e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) 29796e47a3ccSLukas Czerner ret = ext4_set_test_dummy_encryption(sb, ctx->test_dummy_enc_arg); 29806e47a3ccSLukas Czerner 29816e47a3ccSLukas Czerner return ret; 29826e47a3ccSLukas Czerner } 29836e47a3ccSLukas Czerner 29846e47a3ccSLukas Czerner 2985da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 29864c94bff9SLukas Czerner { 2987ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 29886e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 29894c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 29906e47a3ccSLukas Czerner 29916e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 29926e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 29936e47a3ccSLukas Czerner 299433458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 29956e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 29966e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2997ac27a0ecSDave Kleikamp 29986e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 29996e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 3000ac27a0ecSDave Kleikamp 30016e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 30026e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 3003da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 3004b31e1552SEric Sandeen "format mixing"); 3005da812f61SLukas Czerner return -EINVAL; 3006ac27a0ecSDave Kleikamp } 3007ac27a0ecSDave Kleikamp } 3008ac27a0ecSDave Kleikamp #endif 30096e47a3ccSLukas Czerner return 1; 3010ac27a0ecSDave Kleikamp } 3011ac27a0ecSDave Kleikamp 30122adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 30132adf6da8STheodore Ts'o struct super_block *sb) 30142adf6da8STheodore Ts'o { 30152adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 30162adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 301733458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 30182adf6da8STheodore Ts'o 30192adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 30202adf6da8STheodore Ts'o char *fmtname = ""; 30212adf6da8STheodore Ts'o 30222adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 30232adf6da8STheodore Ts'o case QFMT_VFS_OLD: 30242adf6da8STheodore Ts'o fmtname = "vfsold"; 30252adf6da8STheodore Ts'o break; 30262adf6da8STheodore Ts'o case QFMT_VFS_V0: 30272adf6da8STheodore Ts'o fmtname = "vfsv0"; 30282adf6da8STheodore Ts'o break; 30292adf6da8STheodore Ts'o case QFMT_VFS_V1: 30302adf6da8STheodore Ts'o fmtname = "vfsv1"; 30312adf6da8STheodore Ts'o break; 30322adf6da8STheodore Ts'o } 30332adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 30342adf6da8STheodore Ts'o } 30352adf6da8STheodore Ts'o 303633458eabSTheodore Ts'o rcu_read_lock(); 303733458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 303833458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 303933458eabSTheodore Ts'o if (usr_qf_name) 304033458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 304133458eabSTheodore Ts'o if (grp_qf_name) 304233458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 304333458eabSTheodore Ts'o rcu_read_unlock(); 30442adf6da8STheodore Ts'o #endif 30452adf6da8STheodore Ts'o } 30462adf6da8STheodore Ts'o 30475a916be1STheodore Ts'o static const char *token2str(int token) 30485a916be1STheodore Ts'o { 304950df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 30505a916be1STheodore Ts'o 30515a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 30525a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 30535a916be1STheodore Ts'o break; 30545a916be1STheodore Ts'o return t->pattern; 30555a916be1STheodore Ts'o } 30565a916be1STheodore Ts'o 30572adf6da8STheodore Ts'o /* 30582adf6da8STheodore Ts'o * Show an option if 30592adf6da8STheodore Ts'o * - it's set to a non-default value OR 30602adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 30612adf6da8STheodore Ts'o */ 306266acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 306366acdcf4STheodore Ts'o int nodefs) 30642adf6da8STheodore Ts'o { 30652adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 30662adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 306768afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 30685a916be1STheodore Ts'o const struct mount_opts *m; 306966acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 30702adf6da8STheodore Ts'o 307166acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 307266acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 30732adf6da8STheodore Ts'o 30742adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 30755a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 30765a916be1STheodore Ts'o 30775a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 30785a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 30795a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 30809cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 30815a916be1STheodore Ts'o continue; 308268afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 30835a916be1STheodore Ts'o continue; /* skip if same as the default */ 30845a916be1STheodore Ts'o if ((want_set && 30855a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 30865a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 30875a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 30885a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 30895a916be1STheodore Ts'o } 30905a916be1STheodore Ts'o 309108cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 30925a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 309308cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 309408cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 309508cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 30965a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 309708cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 309808cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 309966acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 31005a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 31015a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 31022adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 31035a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 31042adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 31055a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 310666acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 31075a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 310866acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 31095a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 311066acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 31115a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 3112357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 31135a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 311466acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 31155a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 311668afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 311768afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 31182adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 31195a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 31202adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 31215a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 31222adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 31235a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 31245a916be1STheodore Ts'o } 312566acdcf4STheodore Ts'o if (nodefs || 312666acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 31275a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 31282adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 31292adf6da8STheodore Ts'o 3130ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 313166acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 31325a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3133df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3134df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 31357915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 31367915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3137ed318a6cSEric Biggers 3138ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 31392adf6da8STheodore Ts'o 31404f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 31414f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 31424f74d15fSEric Biggers 31439cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 31449cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 31459cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 31469cb20f94SIra Weiny else 31479cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 31489cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 31499cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 31509cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 31519cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 31529cb20f94SIra Weiny } 31532adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 31542adf6da8STheodore Ts'o return 0; 31552adf6da8STheodore Ts'o } 31562adf6da8STheodore Ts'o 315766acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 315866acdcf4STheodore Ts'o { 315966acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 316066acdcf4STheodore Ts'o } 316166acdcf4STheodore Ts'o 3162ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 316366acdcf4STheodore Ts'o { 316466acdcf4STheodore Ts'o struct super_block *sb = seq->private; 316566acdcf4STheodore Ts'o int rc; 316666acdcf4STheodore Ts'o 3167bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 316866acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 316966acdcf4STheodore Ts'o seq_puts(seq, "\n"); 317066acdcf4STheodore Ts'o return rc; 317166acdcf4STheodore Ts'o } 317266acdcf4STheodore Ts'o 3173617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3174ac27a0ecSDave Kleikamp int read_only) 3175ac27a0ecSDave Kleikamp { 3176617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3177c89128a0SJaegeuk Kim int err = 0; 3178ac27a0ecSDave Kleikamp 3179617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3180b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3181b31e1552SEric Sandeen "forcing read-only mode"); 3182c89128a0SJaegeuk Kim err = -EROFS; 31835adaccacSyangerkun goto done; 3184ac27a0ecSDave Kleikamp } 3185ac27a0ecSDave Kleikamp if (read_only) 3186281b5995STheodore Ts'o goto done; 3187617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3188b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3189b31e1552SEric Sandeen "running e2fsck is recommended"); 3190c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3191b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3192b31e1552SEric Sandeen "warning: mounting fs with errors, " 3193b31e1552SEric Sandeen "running e2fsck is recommended"); 3194ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3195ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3196ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3197b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3198b31e1552SEric Sandeen "warning: maximal mount count reached, " 3199b31e1552SEric Sandeen "running e2fsck is recommended"); 3200ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 32016a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 32026a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3203b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3204b31e1552SEric Sandeen "warning: checktime reached, " 3205b31e1552SEric Sandeen "running e2fsck is recommended"); 32060390131bSFrank Mayhar if (!sbi->s_journal) 3207216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3208ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3209617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3210e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 32116a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 321202f310fcSJan Kara if (sbi->s_journal) { 3213e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 321402f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 321502f310fcSJan Kara ext4_set_feature_orphan_present(sb); 321602f310fcSJan Kara } 3217ac27a0ecSDave Kleikamp 32184392fbc4SJan Kara err = ext4_commit_super(sb); 3219281b5995STheodore Ts'o done: 3220ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3221a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3222a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3223ac27a0ecSDave Kleikamp sb->s_blocksize, 3224ac27a0ecSDave Kleikamp sbi->s_groups_count, 3225617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3226617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3227a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3228ac27a0ecSDave Kleikamp 32297abc52c2SDan Magenheimer cleancache_init_fs(sb); 3230c89128a0SJaegeuk Kim return err; 3231ac27a0ecSDave Kleikamp } 3232ac27a0ecSDave Kleikamp 3233117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3234117fff10STheodore Ts'o { 3235117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 32367c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 323737b0b6b8SDan Carpenter int size, i, j; 3238117fff10STheodore Ts'o 3239117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3240117fff10STheodore Ts'o return 0; 3241117fff10STheodore Ts'o 3242117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3243117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3244117fff10STheodore Ts'o return 0; 3245117fff10STheodore Ts'o 32467c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 32477c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3248117fff10STheodore Ts'o if (!new_groups) { 32497c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 32507c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3251117fff10STheodore Ts'o return -ENOMEM; 3252117fff10STheodore Ts'o } 32537c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 32547c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 32557c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 32567c990728SSuraj Jitindar Singh GFP_KERNEL); 32577c990728SSuraj Jitindar Singh if (!new_groups[i]) { 325837b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 325937b0b6b8SDan Carpenter kvfree(new_groups[j]); 32607c990728SSuraj Jitindar Singh kvfree(new_groups); 32617c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 32627c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 32637c990728SSuraj Jitindar Singh return -ENOMEM; 3264117fff10STheodore Ts'o } 32657c990728SSuraj Jitindar Singh } 32667c990728SSuraj Jitindar Singh rcu_read_lock(); 32677c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 32687c990728SSuraj Jitindar Singh if (old_groups) 32697c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 32707c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 32717c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 32727c990728SSuraj Jitindar Singh rcu_read_unlock(); 32737c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 32747c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 32757c990728SSuraj Jitindar Singh if (old_groups) 32767c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3277117fff10STheodore Ts'o return 0; 3278117fff10STheodore Ts'o } 3279117fff10STheodore Ts'o 3280772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3281772cb7c8SJose R. Santos { 3282772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3283772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 32847c990728SSuraj Jitindar Singh struct flex_groups *fg; 3285772cb7c8SJose R. Santos ext4_group_t flex_group; 3286117fff10STheodore Ts'o int i, err; 3287772cb7c8SJose R. Santos 3288503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3289d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3290772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3291772cb7c8SJose R. Santos return 1; 3292772cb7c8SJose R. Santos } 3293772cb7c8SJose R. Santos 3294117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3295117fff10STheodore Ts'o if (err) 3296772cb7c8SJose R. Santos goto failed; 3297772cb7c8SJose R. Santos 3298772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 329988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3300772cb7c8SJose R. Santos 3301772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 33027c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 33037c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 330490ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 33057c990728SSuraj Jitindar Singh &fg->free_clusters); 33067c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3307772cb7c8SJose R. Santos } 3308772cb7c8SJose R. Santos 3309772cb7c8SJose R. Santos return 1; 3310772cb7c8SJose R. Santos failed: 3311772cb7c8SJose R. Santos return 0; 3312772cb7c8SJose R. Santos } 3313772cb7c8SJose R. Santos 3314e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3315717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3316717d50e4SAndreas Dilger { 3317b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3318717d50e4SAndreas Dilger __u16 crc = 0; 3319717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3320e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3321717d50e4SAndreas Dilger 33229aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3323feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3324feb0ab32SDarrick J. Wong __u32 csum32; 3325b47820edSDaeho Jeong __u16 dummy_csum = 0; 3326feb0ab32SDarrick J. Wong 3327feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3328feb0ab32SDarrick J. Wong sizeof(le_group)); 3329b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3330b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3331b47820edSDaeho Jeong sizeof(dummy_csum)); 3332b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3333b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3334b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3335b47820edSDaeho Jeong sbi->s_desc_size - offset); 3336feb0ab32SDarrick J. Wong 3337feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3338feb0ab32SDarrick J. Wong goto out; 3339feb0ab32SDarrick J. Wong } 3340feb0ab32SDarrick J. Wong 3341feb0ab32SDarrick J. Wong /* old crc16 code */ 3342e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3343813d32f9SDarrick J. Wong return 0; 3344813d32f9SDarrick J. Wong 3345717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3346717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3347717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3348717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3349717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3350e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3351717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3352717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3353717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3354717d50e4SAndreas Dilger offset); 3355717d50e4SAndreas Dilger 3356feb0ab32SDarrick J. Wong out: 3357717d50e4SAndreas Dilger return cpu_to_le16(crc); 3358717d50e4SAndreas Dilger } 3359717d50e4SAndreas Dilger 3360feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3361717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3362717d50e4SAndreas Dilger { 3363feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3364e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3365717d50e4SAndreas Dilger return 0; 3366717d50e4SAndreas Dilger 3367717d50e4SAndreas Dilger return 1; 3368717d50e4SAndreas Dilger } 3369717d50e4SAndreas Dilger 3370feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3371feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3372feb0ab32SDarrick J. Wong { 3373feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3374feb0ab32SDarrick J. Wong return; 3375e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3376feb0ab32SDarrick J. Wong } 3377feb0ab32SDarrick J. Wong 3378ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3379bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3380829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3381bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3382ac27a0ecSDave Kleikamp { 3383617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3384617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3385617ba13bSMingming Cao ext4_fsblk_t last_block; 338644de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3387bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3388bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3389bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3390ce421581SJose R. Santos int flexbg_flag = 0; 3391bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3392ac27a0ecSDave Kleikamp 3393e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3394ce421581SJose R. Santos flexbg_flag = 1; 3395ce421581SJose R. Santos 3396617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3397ac27a0ecSDave Kleikamp 3398197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3399197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3400197cd65aSAkinobu Mita 3401ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3402bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3403ac27a0ecSDave Kleikamp else 3404ac27a0ecSDave Kleikamp last_block = first_block + 3405617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3406ac27a0ecSDave Kleikamp 3407bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3408bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3409bfff6873SLukas Czerner grp = i; 3410bfff6873SLukas Czerner 34118fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3412829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3413829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3414829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3415829fa70dSTheodore Ts'o "superblock", i); 341618db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 341718db4b4eSTheodore Ts'o return 0; 3418829fa70dSTheodore Ts'o } 341977260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 342077260807STheodore Ts'o block_bitmap <= last_bg_block) { 342177260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 342277260807STheodore Ts'o "Block bitmap for group %u overlaps " 342377260807STheodore Ts'o "block group descriptors", i); 342477260807STheodore Ts'o if (!sb_rdonly(sb)) 342577260807STheodore Ts'o return 0; 342677260807STheodore Ts'o } 34272b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3428b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3429a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3430b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3431ac27a0ecSDave Kleikamp return 0; 3432ac27a0ecSDave Kleikamp } 34338fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3434829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3435829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3436829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3437829fa70dSTheodore Ts'o "superblock", i); 343818db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 343918db4b4eSTheodore Ts'o return 0; 3440829fa70dSTheodore Ts'o } 344177260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 344277260807STheodore Ts'o inode_bitmap <= last_bg_block) { 344377260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 344477260807STheodore Ts'o "Inode bitmap for group %u overlaps " 344577260807STheodore Ts'o "block group descriptors", i); 344677260807STheodore Ts'o if (!sb_rdonly(sb)) 344777260807STheodore Ts'o return 0; 344877260807STheodore Ts'o } 34492b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3451a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3452b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3453ac27a0ecSDave Kleikamp return 0; 3454ac27a0ecSDave Kleikamp } 34558fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3456829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3457829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3458829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3459829fa70dSTheodore Ts'o "superblock", i); 346018db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 346118db4b4eSTheodore Ts'o return 0; 3462829fa70dSTheodore Ts'o } 346377260807STheodore Ts'o if (inode_table >= sb_block + 1 && 346477260807STheodore Ts'o inode_table <= last_bg_block) { 346577260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 346677260807STheodore Ts'o "Inode table for group %u overlaps " 346777260807STheodore Ts'o "block group descriptors", i); 346877260807STheodore Ts'o if (!sb_rdonly(sb)) 346977260807STheodore Ts'o return 0; 347077260807STheodore Ts'o } 3471bd81d8eeSLaurent Vivier if (inode_table < first_block || 34722b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3473b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3474a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3475b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3476ac27a0ecSDave Kleikamp return 0; 3477ac27a0ecSDave Kleikamp } 3478955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3479feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3480b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3481b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3482e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3483fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3484bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3485955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3486717d50e4SAndreas Dilger return 0; 3487717d50e4SAndreas Dilger } 34887ee1ec4cSLi Zefan } 3489955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3490ce421581SJose R. Santos if (!flexbg_flag) 3491617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3492ac27a0ecSDave Kleikamp } 3493bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3494bfff6873SLukas Czerner *first_not_zeroed = grp; 3495ac27a0ecSDave Kleikamp return 1; 3496ac27a0ecSDave Kleikamp } 3497ac27a0ecSDave Kleikamp 3498cd2291a4SEric Sandeen /* 3499cd2291a4SEric Sandeen * Maximal extent format file size. 3500cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3501cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3502cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3503cd2291a4SEric Sandeen * so that won't be a limiting factor. 3504cd2291a4SEric Sandeen * 3505f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3506f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3507f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3508f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3509f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3510f17722f9SLukas Czerner * 3511cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3512cd2291a4SEric Sandeen */ 3513f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3514cd2291a4SEric Sandeen { 3515cd2291a4SEric Sandeen loff_t res; 3516cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3517cd2291a4SEric Sandeen 351872deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 351972deb455SChristoph Hellwig 352072deb455SChristoph Hellwig if (!has_huge_files) { 3521cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3522cd2291a4SEric Sandeen 3523cd2291a4SEric Sandeen /* total blocks in file system block size */ 3524cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3525cd2291a4SEric Sandeen upper_limit <<= blkbits; 3526cd2291a4SEric Sandeen } 3527cd2291a4SEric Sandeen 3528f17722f9SLukas Czerner /* 3529f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3530f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3531f17722f9SLukas Czerner * size 3532f17722f9SLukas Czerner */ 3533f17722f9SLukas Czerner res = (1LL << 32) - 1; 3534cd2291a4SEric Sandeen res <<= blkbits; 3535cd2291a4SEric Sandeen 3536cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3537cd2291a4SEric Sandeen if (res > upper_limit) 3538cd2291a4SEric Sandeen res = upper_limit; 3539cd2291a4SEric Sandeen 3540cd2291a4SEric Sandeen return res; 3541cd2291a4SEric Sandeen } 3542ac27a0ecSDave Kleikamp 3543ac27a0ecSDave Kleikamp /* 3544cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 35450fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 35460fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3547ac27a0ecSDave Kleikamp */ 3548f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3549ac27a0ecSDave Kleikamp { 355075ca6ad4SRitesh Harjani unsigned long long upper_limit, res = EXT4_NDIR_BLOCKS; 35510fc1b451SAneesh Kumar K.V int meta_blocks; 355275ca6ad4SRitesh Harjani 355375ca6ad4SRitesh Harjani /* 355475ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 35550b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 35560b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 35570b8e58a1SAndreas Dilger * 35580b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 35590b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 35600fc1b451SAneesh Kumar K.V */ 356172deb455SChristoph Hellwig if (!has_huge_files) { 35620fc1b451SAneesh Kumar K.V /* 356372deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 356472deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 356572deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 35660fc1b451SAneesh Kumar K.V */ 35670fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 35680fc1b451SAneesh Kumar K.V 35690fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 35700fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 35710fc1b451SAneesh Kumar K.V 35720fc1b451SAneesh Kumar K.V } else { 35738180a562SAneesh Kumar K.V /* 35748180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 35758180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 35768180a562SAneesh Kumar K.V * represent total number of blocks in 35778180a562SAneesh Kumar K.V * file system block size 35788180a562SAneesh Kumar K.V */ 35790fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 35800fc1b451SAneesh Kumar K.V 35810fc1b451SAneesh Kumar K.V } 35820fc1b451SAneesh Kumar K.V 35830fc1b451SAneesh Kumar K.V /* indirect blocks */ 35840fc1b451SAneesh Kumar K.V meta_blocks = 1; 35850fc1b451SAneesh Kumar K.V /* double indirect blocks */ 35860fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 35870fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 35880fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 35890fc1b451SAneesh Kumar K.V 35900fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 35910fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3592ac27a0ecSDave Kleikamp 3593ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3594ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3595ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3596ac27a0ecSDave Kleikamp res <<= bits; 3597ac27a0ecSDave Kleikamp if (res > upper_limit) 3598ac27a0ecSDave Kleikamp res = upper_limit; 35990fc1b451SAneesh Kumar K.V 36000fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 36010fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 36020fc1b451SAneesh Kumar K.V 360375ca6ad4SRitesh Harjani return (loff_t)res; 3604ac27a0ecSDave Kleikamp } 3605ac27a0ecSDave Kleikamp 3606617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 360770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3608ac27a0ecSDave Kleikamp { 3609617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3610fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3611ac27a0ecSDave Kleikamp int has_super = 0; 3612ac27a0ecSDave Kleikamp 3613ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3614ac27a0ecSDave Kleikamp 3615e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 361670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3617ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3618617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3619ac27a0ecSDave Kleikamp has_super = 1; 36200b8e58a1SAndreas Dilger 3621bd63f6b0SDarrick J. Wong /* 3622bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3623bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3624bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3625bd63f6b0SDarrick J. Wong * compensate. 3626bd63f6b0SDarrick J. Wong */ 3627bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 362849598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3629bd63f6b0SDarrick J. Wong has_super++; 3630bd63f6b0SDarrick J. Wong 3631617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3632ac27a0ecSDave Kleikamp } 3633ac27a0ecSDave Kleikamp 3634c9de560dSAlex Tomas /** 3635c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3636c9de560dSAlex Tomas * @sbi: In memory super block info 3637c9de560dSAlex Tomas * 3638c9de560dSAlex Tomas * If we have specified it via mount option, then 3639c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3640c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3641c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3642c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3643c9de560dSAlex Tomas * 3644c9de560dSAlex Tomas */ 3645c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3646c9de560dSAlex Tomas { 3647c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3648c9de560dSAlex Tomas unsigned long stripe_width = 3649c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 36503eb08658SDan Ehrenberg int ret; 3651c9de560dSAlex Tomas 3652c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 36533eb08658SDan Ehrenberg ret = sbi->s_stripe; 36545469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 36553eb08658SDan Ehrenberg ret = stripe_width; 36565469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 36573eb08658SDan Ehrenberg ret = stride; 36583eb08658SDan Ehrenberg else 36593eb08658SDan Ehrenberg ret = 0; 3660c9de560dSAlex Tomas 36613eb08658SDan Ehrenberg /* 36623eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 36633eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 36643eb08658SDan Ehrenberg */ 36653eb08658SDan Ehrenberg if (ret <= 1) 36663eb08658SDan Ehrenberg ret = 0; 3667c9de560dSAlex Tomas 36683eb08658SDan Ehrenberg return ret; 3669c9de560dSAlex Tomas } 3670ac27a0ecSDave Kleikamp 3671a13fb1a4SEric Sandeen /* 3672a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3673a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3674a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3675a13fb1a4SEric Sandeen * 0 if it cannot be. 3676a13fb1a4SEric Sandeen */ 367725c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3678a13fb1a4SEric Sandeen { 3679e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3680a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3681a13fb1a4SEric Sandeen "Couldn't mount because of " 3682a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3683a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3684a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3685a13fb1a4SEric Sandeen return 0; 3686a13fb1a4SEric Sandeen } 3687a13fb1a4SEric Sandeen 3688c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3689c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3690c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3691c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3692c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3693c83ad55eSGabriel Krisman Bertazi return 0; 3694c83ad55eSGabriel Krisman Bertazi } 3695c83ad55eSGabriel Krisman Bertazi #endif 3696c83ad55eSGabriel Krisman Bertazi 3697a13fb1a4SEric Sandeen if (readonly) 3698a13fb1a4SEric Sandeen return 1; 3699a13fb1a4SEric Sandeen 3700e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 37012cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 37021751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 37032cb5cc8bSDarrick J. Wong return 1; 37042cb5cc8bSDarrick J. Wong } 37052cb5cc8bSDarrick J. Wong 3706a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3707e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3708a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3709a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3710a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3711a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3712a13fb1a4SEric Sandeen return 0; 3713a13fb1a4SEric Sandeen } 3714e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3715bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3716bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3717bab08ab9STheodore Ts'o "extents feature\n"); 3718bab08ab9STheodore Ts'o return 0; 3719bab08ab9STheodore Ts'o } 37207c319d32SAditya Kali 37219db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3722d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3723d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 37247c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3725d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3726689c958cSLi Xi return 0; 3727689c958cSLi Xi } 37287c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3729a13fb1a4SEric Sandeen return 1; 3730a13fb1a4SEric Sandeen } 3731a13fb1a4SEric Sandeen 373266e61a9eSTheodore Ts'o /* 373366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 373466e61a9eSTheodore Ts'o * on the file system 373566e61a9eSTheodore Ts'o */ 3736235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 373766e61a9eSTheodore Ts'o { 3738235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3739235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3740235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 374166e61a9eSTheodore Ts'o 374266e61a9eSTheodore Ts'o if (es->s_error_count) 3743ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3744ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 374566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 374666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 37476a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 37486a0678a7SArnd Bergmann sb->s_id, 37496a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 375066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 375166e61a9eSTheodore Ts'o es->s_first_error_func, 375266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 375366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3754651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 375566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 375666e61a9eSTheodore Ts'o if (es->s_first_error_block) 3757651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 375866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3759651e1c3bSJoe Perches printk(KERN_CONT "\n"); 376066e61a9eSTheodore Ts'o } 376166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 37626a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 37636a0678a7SArnd Bergmann sb->s_id, 37646a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 376566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 376666e61a9eSTheodore Ts'o es->s_last_error_func, 376766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 376866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3769651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 377066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 377166e61a9eSTheodore Ts'o if (es->s_last_error_block) 3772651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 377366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3774651e1c3bSJoe Perches printk(KERN_CONT "\n"); 377566e61a9eSTheodore Ts'o } 377666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 377766e61a9eSTheodore Ts'o } 377866e61a9eSTheodore Ts'o 3779bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3780bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3781bfff6873SLukas Czerner { 3782bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 37833d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 37843d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 37853d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 37863d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3787bfff6873SLukas Czerner int ret = 0; 378839fec688SShaoying Xu u64 start_time; 3789bfff6873SLukas Czerner 37903d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 37913d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 37923d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 37933d392b26STheodore Ts'o if (prefetch_ios) 37943d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 37953d392b26STheodore Ts'o prefetch_ios); 37963d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 37973d392b26STheodore Ts'o prefetch_ios); 37983d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 37993d392b26STheodore Ts'o ret = 1; 38003d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 38013d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 38023d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 38033d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 38043d392b26STheodore Ts'o ret = 0; 38053d392b26STheodore Ts'o } 38063d392b26STheodore Ts'o } 38073d392b26STheodore Ts'o return ret; 38083d392b26STheodore Ts'o } 3809bfff6873SLukas Czerner 38103d392b26STheodore Ts'o for (; group < ngroups; group++) { 3811bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3812bfff6873SLukas Czerner if (!gdp) { 3813bfff6873SLukas Czerner ret = 1; 3814bfff6873SLukas Czerner break; 3815bfff6873SLukas Czerner } 3816bfff6873SLukas Czerner 3817bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3818bfff6873SLukas Czerner break; 3819bfff6873SLukas Czerner } 3820bfff6873SLukas Czerner 38217f511862STheodore Ts'o if (group >= ngroups) 3822bfff6873SLukas Czerner ret = 1; 3823bfff6873SLukas Czerner 3824bfff6873SLukas Czerner if (!ret) { 382539fec688SShaoying Xu start_time = ktime_get_real_ns(); 3826bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3827bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 38283d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3829bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 383039fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 383139fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3832bfff6873SLukas Czerner } 3833bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3834bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3835bfff6873SLukas Czerner } 3836bfff6873SLukas Czerner return ret; 3837bfff6873SLukas Czerner } 3838bfff6873SLukas Czerner 3839bfff6873SLukas Czerner /* 3840bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 38414ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3842bfff6873SLukas Czerner */ 3843bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3844bfff6873SLukas Czerner { 3845bfff6873SLukas Czerner if (!elr) 3846bfff6873SLukas Czerner return; 3847bfff6873SLukas Czerner 3848bfff6873SLukas Czerner list_del(&elr->lr_request); 38493d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3850bfff6873SLukas Czerner kfree(elr); 3851bfff6873SLukas Czerner } 3852bfff6873SLukas Czerner 3853bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3854bfff6873SLukas Czerner { 38551bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 38561bb933fbSLukas Czerner if (!ext4_li_info) { 38571bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3858bfff6873SLukas Czerner return; 38591bb933fbSLukas Czerner } 3860bfff6873SLukas Czerner 3861bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 38621bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3863bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 38641bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3865bfff6873SLukas Czerner } 3866bfff6873SLukas Czerner 38678f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 38688f1f7453SEric Sandeen 3869bfff6873SLukas Czerner /* 3870bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3871bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3872bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3873bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3874bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3875bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3876bfff6873SLukas Czerner * next waking time and put itself into sleep. 3877bfff6873SLukas Czerner */ 3878bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3879bfff6873SLukas Czerner { 3880bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3881bfff6873SLukas Czerner struct list_head *pos, *n; 3882bfff6873SLukas Czerner struct ext4_li_request *elr; 38834ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3884bfff6873SLukas Czerner 3885bfff6873SLukas Czerner BUG_ON(NULL == eli); 3886bfff6873SLukas Czerner 3887bfff6873SLukas Czerner cont_thread: 3888bfff6873SLukas Czerner while (true) { 3889bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3890bfff6873SLukas Czerner 3891bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3892bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3893bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3894bfff6873SLukas Czerner goto exit_thread; 3895bfff6873SLukas Czerner } 3896bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3897e22834f0SDmitry Monakhov int err = 0; 3898e22834f0SDmitry Monakhov int progress = 0; 3899bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3900bfff6873SLukas Czerner lr_request); 3901bfff6873SLukas Czerner 3902e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3903e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3904e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3905e22834f0SDmitry Monakhov continue; 3906e22834f0SDmitry Monakhov } 3907e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3908e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3909e22834f0SDmitry Monakhov progress = 1; 3910e22834f0SDmitry Monakhov /* 3911e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3912e22834f0SDmitry Monakhov * be removed from the list, it is 3913e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3914e22834f0SDmitry Monakhov */ 3915e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3916e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3917e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3918e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3919e22834f0SDmitry Monakhov n = pos->next; 3920e22834f0SDmitry Monakhov } 3921e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3922e22834f0SDmitry Monakhov } 3923b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3924e22834f0SDmitry Monakhov if (err) { 3925bfff6873SLukas Czerner ext4_remove_li_request(elr); 3926bfff6873SLukas Czerner continue; 3927bfff6873SLukas Czerner } 3928e22834f0SDmitry Monakhov if (!progress) { 3929e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3930e22834f0SDmitry Monakhov (prandom_u32() 3931e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3932b2c78cd0STheodore Ts'o } 3933bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3934bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3935bfff6873SLukas Czerner } 3936bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3937bfff6873SLukas Czerner 3938a0acae0eSTejun Heo try_to_freeze(); 3939bfff6873SLukas Czerner 39404ed5c033SLukas Czerner cur = jiffies; 39414ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3942f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3943bfff6873SLukas Czerner cond_resched(); 3944bfff6873SLukas Czerner continue; 3945bfff6873SLukas Czerner } 3946bfff6873SLukas Czerner 39474ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 39484ed5c033SLukas Czerner 39498f1f7453SEric Sandeen if (kthread_should_stop()) { 39508f1f7453SEric Sandeen ext4_clear_request_list(); 39518f1f7453SEric Sandeen goto exit_thread; 39528f1f7453SEric Sandeen } 3953bfff6873SLukas Czerner } 3954bfff6873SLukas Czerner 3955bfff6873SLukas Czerner exit_thread: 3956bfff6873SLukas Czerner /* 3957bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3958bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3959bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3960bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3961bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3962bfff6873SLukas Czerner * new one. 3963bfff6873SLukas Czerner */ 3964bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3965bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3966bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3967bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3968bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3969bfff6873SLukas Czerner goto cont_thread; 3970bfff6873SLukas Czerner } 3971bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3972bfff6873SLukas Czerner kfree(ext4_li_info); 3973bfff6873SLukas Czerner ext4_li_info = NULL; 3974bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3975bfff6873SLukas Czerner 3976bfff6873SLukas Czerner return 0; 3977bfff6873SLukas Czerner } 3978bfff6873SLukas Czerner 3979bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3980bfff6873SLukas Czerner { 3981bfff6873SLukas Czerner struct list_head *pos, *n; 3982bfff6873SLukas Czerner struct ext4_li_request *elr; 3983bfff6873SLukas Czerner 3984bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3985bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3986bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3987bfff6873SLukas Czerner lr_request); 3988bfff6873SLukas Czerner ext4_remove_li_request(elr); 3989bfff6873SLukas Czerner } 3990bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3991bfff6873SLukas Czerner } 3992bfff6873SLukas Czerner 3993bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3994bfff6873SLukas Czerner { 39958f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 39968f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 39978f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 39988f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3999bfff6873SLukas Czerner ext4_clear_request_list(); 4000bfff6873SLukas Czerner kfree(ext4_li_info); 4001bfff6873SLukas Czerner ext4_li_info = NULL; 400292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 4003bfff6873SLukas Czerner "initialization thread\n", 4004bfff6873SLukas Czerner err); 4005bfff6873SLukas Czerner return err; 4006bfff6873SLukas Czerner } 4007bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 4008bfff6873SLukas Czerner return 0; 4009bfff6873SLukas Czerner } 4010bfff6873SLukas Czerner 4011bfff6873SLukas Czerner /* 4012bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 4013bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 4014bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 4015bfff6873SLukas Czerner * groups and return total number of groups. 4016bfff6873SLukas Czerner */ 4017bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 4018bfff6873SLukas Czerner { 4019bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 4020bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 4021bfff6873SLukas Czerner 40228844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 40238844618dSTheodore Ts'o return ngroups; 40248844618dSTheodore Ts'o 4025bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 4026bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 4027bfff6873SLukas Czerner if (!gdp) 4028bfff6873SLukas Czerner continue; 4029bfff6873SLukas Czerner 403050122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 4031bfff6873SLukas Czerner break; 4032bfff6873SLukas Czerner } 4033bfff6873SLukas Czerner 4034bfff6873SLukas Czerner return group; 4035bfff6873SLukas Czerner } 4036bfff6873SLukas Czerner 4037bfff6873SLukas Czerner static int ext4_li_info_new(void) 4038bfff6873SLukas Czerner { 4039bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 4040bfff6873SLukas Czerner 4041bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 4042bfff6873SLukas Czerner if (!eli) 4043bfff6873SLukas Czerner return -ENOMEM; 4044bfff6873SLukas Czerner 4045bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 4046bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 4047bfff6873SLukas Czerner 4048bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 4049bfff6873SLukas Czerner 4050bfff6873SLukas Czerner ext4_li_info = eli; 4051bfff6873SLukas Czerner 4052bfff6873SLukas Czerner return 0; 4053bfff6873SLukas Czerner } 4054bfff6873SLukas Czerner 4055bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 4056bfff6873SLukas Czerner ext4_group_t start) 4057bfff6873SLukas Czerner { 4058bfff6873SLukas Czerner struct ext4_li_request *elr; 4059bfff6873SLukas Czerner 4060bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 4061bfff6873SLukas Czerner if (!elr) 4062bfff6873SLukas Czerner return NULL; 4063bfff6873SLukas Czerner 4064bfff6873SLukas Czerner elr->lr_super = sb; 40653d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 406621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 40673d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 4068bfff6873SLukas Czerner elr->lr_next_group = start; 406921175ca4SHarshad Shirwadkar } else { 407021175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 40713d392b26STheodore Ts'o } 4072bfff6873SLukas Czerner 4073bfff6873SLukas Czerner /* 4074bfff6873SLukas Czerner * Randomize first schedule time of the request to 4075bfff6873SLukas Czerner * spread the inode table initialization requests 4076bfff6873SLukas Czerner * better. 4077bfff6873SLukas Czerner */ 4078dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 4079dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 4080bfff6873SLukas Czerner return elr; 4081bfff6873SLukas Czerner } 4082bfff6873SLukas Czerner 40837f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 4084bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 4085bfff6873SLukas Czerner { 4086bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 40877f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 408849598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 40896c5a6cb9SAndrew Morton int ret = 0; 4090bfff6873SLukas Czerner 40917f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 409251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 409351ce6511SLukas Czerner /* 409451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 409551ce6511SLukas Czerner * s_li_wait_mult might have changed. 409651ce6511SLukas Czerner */ 409751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 40987f511862STheodore Ts'o goto out; 409951ce6511SLukas Czerner } 4100bfff6873SLukas Czerner 410121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 41023d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 41033d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 41047f511862STheodore Ts'o goto out; 4105bfff6873SLukas Czerner 4106bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 41077f511862STheodore Ts'o if (!elr) { 41087f511862STheodore Ts'o ret = -ENOMEM; 41097f511862STheodore Ts'o goto out; 41107f511862STheodore Ts'o } 4111bfff6873SLukas Czerner 4112bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4113bfff6873SLukas Czerner ret = ext4_li_info_new(); 4114bfff6873SLukas Czerner if (ret) 4115bfff6873SLukas Czerner goto out; 4116bfff6873SLukas Czerner } 4117bfff6873SLukas Czerner 4118bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4119bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4120bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4121bfff6873SLukas Czerner 4122bfff6873SLukas Czerner sbi->s_li_request = elr; 412346e4690bSTao Ma /* 412446e4690bSTao Ma * set elr to NULL here since it has been inserted to 412546e4690bSTao Ma * the request_list and the removal and free of it is 412646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 412746e4690bSTao Ma */ 412846e4690bSTao Ma elr = NULL; 4129bfff6873SLukas Czerner 4130bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4131bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4132bfff6873SLukas Czerner if (ret) 4133bfff6873SLukas Czerner goto out; 4134bfff6873SLukas Czerner } 4135bfff6873SLukas Czerner out: 4136bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4137beed5ecbSNicolas Kaiser if (ret) 4138bfff6873SLukas Czerner kfree(elr); 4139bfff6873SLukas Czerner return ret; 4140bfff6873SLukas Czerner } 4141bfff6873SLukas Czerner 4142bfff6873SLukas Czerner /* 4143bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4144bfff6873SLukas Czerner * module unload. 4145bfff6873SLukas Czerner */ 4146bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4147bfff6873SLukas Czerner { 4148bfff6873SLukas Czerner /* 4149bfff6873SLukas Czerner * If thread exited earlier 4150bfff6873SLukas Czerner * there's nothing to be done. 4151bfff6873SLukas Czerner */ 41528f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4153bfff6873SLukas Czerner return; 4154bfff6873SLukas Czerner 41558f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4156bfff6873SLukas Czerner } 4157bfff6873SLukas Czerner 415825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 415925ed6e8aSDarrick J. Wong { 416025ed6e8aSDarrick J. Wong int ret = 1; 416125ed6e8aSDarrick J. Wong int compat, incompat; 416225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 416325ed6e8aSDarrick J. Wong 41649aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4165db9ee220SDarrick J. Wong /* journal checksum v3 */ 416625ed6e8aSDarrick J. Wong compat = 0; 4167db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 416825ed6e8aSDarrick J. Wong } else { 416925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 417025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 417125ed6e8aSDarrick J. Wong incompat = 0; 417225ed6e8aSDarrick J. Wong } 417325ed6e8aSDarrick J. Wong 4174feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4175feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4176feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4177feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 417825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 417925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 418025ed6e8aSDarrick J. Wong compat, 0, 418125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 418225ed6e8aSDarrick J. Wong incompat); 418325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 418425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 418525ed6e8aSDarrick J. Wong compat, 0, 418625ed6e8aSDarrick J. Wong incompat); 418725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 418825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 418925ed6e8aSDarrick J. Wong } else { 4190feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4191feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 419225ed6e8aSDarrick J. Wong } 419325ed6e8aSDarrick J. Wong 419425ed6e8aSDarrick J. Wong return ret; 419525ed6e8aSDarrick J. Wong } 419625ed6e8aSDarrick J. Wong 4197952fc18eSTheodore Ts'o /* 4198952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4199952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4200952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4201952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4202952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4203952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4204952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4205952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4206952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4207952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4208952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4209952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4210952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4211952fc18eSTheodore Ts'o */ 4212952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4213952fc18eSTheodore Ts'o char *buf) 4214952fc18eSTheodore Ts'o { 4215952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4216952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4217952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4218952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4219952fc18eSTheodore Ts'o int s, j, count = 0; 4220952fc18eSTheodore Ts'o 4221e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 42220548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 42230548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 42240548bbb8STheodore Ts'o 4225952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4226952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4227952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4228952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4229952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4230952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4231952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4232952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4233952fc18eSTheodore Ts'o count++; 4234952fc18eSTheodore Ts'o } 4235952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4236952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4237952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4238952fc18eSTheodore Ts'o count++; 4239952fc18eSTheodore Ts'o } 4240952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4241952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4242952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4243952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4244952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4245952fc18eSTheodore Ts'o count++; 4246952fc18eSTheodore Ts'o } 4247952fc18eSTheodore Ts'o if (i != grp) 4248952fc18eSTheodore Ts'o continue; 4249952fc18eSTheodore Ts'o s = 0; 4250952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4251952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4252952fc18eSTheodore Ts'o count++; 4253952fc18eSTheodore Ts'o } 4254c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4255c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4256c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4257c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4258c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4259952fc18eSTheodore Ts'o } 4260c48ae41bSTheodore Ts'o count += j; 4261c48ae41bSTheodore Ts'o for (; j > 0; j--) 4262c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4263952fc18eSTheodore Ts'o } 4264952fc18eSTheodore Ts'o if (!count) 4265952fc18eSTheodore Ts'o return 0; 4266952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4267952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4268952fc18eSTheodore Ts'o } 4269952fc18eSTheodore Ts'o 4270952fc18eSTheodore Ts'o /* 4271952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4272952fc18eSTheodore Ts'o */ 4273952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4274952fc18eSTheodore Ts'o { 4275952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4276952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 42773c816dedSEric Whitney struct inode *j_inode; 42783c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4279952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4280952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 42814fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4282952fc18eSTheodore Ts'o 4283952fc18eSTheodore Ts'o if (!buf) 4284952fc18eSTheodore Ts'o return -ENOMEM; 4285952fc18eSTheodore Ts'o 4286952fc18eSTheodore Ts'o /* 4287952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4288952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4289952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4290952fc18eSTheodore Ts'o */ 4291952fc18eSTheodore Ts'o 4292952fc18eSTheodore Ts'o /* 4293952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4294952fc18eSTheodore Ts'o */ 4295952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4296952fc18eSTheodore Ts'o 4297952fc18eSTheodore Ts'o /* 4298952fc18eSTheodore Ts'o * Add the overhead found in each block group 4299952fc18eSTheodore Ts'o */ 4300952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4301952fc18eSTheodore Ts'o int blks; 4302952fc18eSTheodore Ts'o 4303952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4304952fc18eSTheodore Ts'o overhead += blks; 4305952fc18eSTheodore Ts'o if (blks) 4306952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4307952fc18eSTheodore Ts'o cond_resched(); 4308952fc18eSTheodore Ts'o } 43093c816dedSEric Whitney 43103c816dedSEric Whitney /* 43113c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 43123c816dedSEric Whitney * loaded or not 43133c816dedSEric Whitney */ 4314ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4315ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4316f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4317f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 43183c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 43193c816dedSEric Whitney if (j_inode) { 43203c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 43213c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 43223c816dedSEric Whitney iput(j_inode); 43233c816dedSEric Whitney } else { 43243c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 43253c816dedSEric Whitney } 43263c816dedSEric Whitney } 4327952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4328952fc18eSTheodore Ts'o smp_wmb(); 4329952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4330952fc18eSTheodore Ts'o return 0; 4331952fc18eSTheodore Ts'o } 4332952fc18eSTheodore Ts'o 4333b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 433427dd4385SLukas Czerner { 433527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4336b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 433727dd4385SLukas Czerner 433827dd4385SLukas Czerner /* 433930fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 434030fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 434130fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 434230fac0f7SJan Kara * to keep ext2/3 backward compatibility. 434330fac0f7SJan Kara */ 4344e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4345b5799018STheodore Ts'o return; 434630fac0f7SJan Kara /* 434727dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 434827dd4385SLukas Czerner * This should cover the situations where we can not afford to run 434927dd4385SLukas Czerner * out of space like for example punch hole, or converting 4350556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 435127dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 435227dd4385SLukas Czerner * very rare. 435327dd4385SLukas Czerner */ 4354b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4355b5799018STheodore Ts'o sbi->s_cluster_bits); 435627dd4385SLukas Czerner 435727dd4385SLukas Czerner do_div(resv_clusters, 50); 435827dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 435927dd4385SLukas Czerner 4360b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 436127dd4385SLukas Czerner } 436227dd4385SLukas Czerner 4363ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4364ca9b404fSRoman Anufriev { 4365ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4366ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4367ca9b404fSRoman Anufriev return "none"; 4368ca9b404fSRoman Anufriev 4369ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4370ca9b404fSRoman Anufriev return "journalled"; 4371ca9b404fSRoman Anufriev else 4372ca9b404fSRoman Anufriev return "writeback"; 4373ca9b404fSRoman Anufriev #else 4374ca9b404fSRoman Anufriev return "disabled"; 4375ca9b404fSRoman Anufriev #endif 4376ca9b404fSRoman Anufriev } 4377ca9b404fSRoman Anufriev 4378188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4379188c299eSJan Kara enum ext4_journal_trigger_type type, 4380188c299eSJan Kara void (*trigger)( 4381188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4382188c299eSJan Kara struct buffer_head *bh, 4383188c299eSJan Kara void *mapped_data, 4384188c299eSJan Kara size_t size)) 4385188c299eSJan Kara { 4386188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4387188c299eSJan Kara 4388188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4389188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4390188c299eSJan Kara } 4391188c299eSJan Kara 43927edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4393ac27a0ecSDave Kleikamp { 43947edfd85bSLukas Czerner if (!sbi) 43957edfd85bSLukas Czerner return; 43967edfd85bSLukas Czerner 43977edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 43987edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 43997edfd85bSLukas Czerner kfree(sbi); 44007edfd85bSLukas Czerner } 44017edfd85bSLukas Czerner 44027edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 44037edfd85bSLukas Czerner { 44047edfd85bSLukas Czerner struct ext4_sb_info *sbi; 44057edfd85bSLukas Czerner 44067edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 44077edfd85bSLukas Czerner if (!sbi) 44087edfd85bSLukas Czerner return NULL; 44097edfd85bSLukas Czerner 44107edfd85bSLukas Czerner sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev); 44117edfd85bSLukas Czerner 44127edfd85bSLukas Czerner sbi->s_blockgroup_lock = 44137edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 44147edfd85bSLukas Czerner 44157edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 44167edfd85bSLukas Czerner goto err_out; 44177edfd85bSLukas Czerner 44187edfd85bSLukas Czerner sb->s_fs_info = sbi; 44197edfd85bSLukas Czerner sbi->s_sb = sb; 44207edfd85bSLukas Czerner return sbi; 44217edfd85bSLukas Czerner err_out: 44227edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 44237edfd85bSLukas Czerner kfree(sbi); 44247edfd85bSLukas Czerner return NULL; 44257edfd85bSLukas Czerner } 44267edfd85bSLukas Czerner 44277edfd85bSLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb, 44287edfd85bSLukas Czerner int silent) 44297edfd85bSLukas Czerner { 44301d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4431617ba13bSMingming Cao struct ext4_super_block *es = NULL; 44327edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 44337c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4434617ba13bSMingming Cao ext4_fsblk_t block; 443570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4436ac27a0ecSDave Kleikamp unsigned long offset = 0; 4437ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4438ac27a0ecSDave Kleikamp struct inode *root; 4439dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4440281b5995STheodore Ts'o int blocksize, clustersize; 44414ec11028STheodore Ts'o unsigned int db_count; 44424ec11028STheodore Ts'o unsigned int i; 4443ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4444bd81d8eeSLaurent Vivier __u64 blocks_count; 444507aa2ea1SLukas Czerner int err = 0; 4446bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 44477edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 4448b237e304SHarshad Shirwadkar 4449b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 44507edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 44517edfd85bSLukas Czerner ctx->mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4452ac27a0ecSDave Kleikamp 4453240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4454f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 44558446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4456ac27a0ecSDave Kleikamp 445707aa2ea1SLukas Czerner /* -EINVAL is default */ 4458dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4459617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4460ac27a0ecSDave Kleikamp if (!blocksize) { 4461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4462ac27a0ecSDave Kleikamp goto out_fail; 4463ac27a0ecSDave Kleikamp } 4464ac27a0ecSDave Kleikamp 4465ac27a0ecSDave Kleikamp /* 4466617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4467ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4468ac27a0ecSDave Kleikamp */ 4469617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 44707edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 447170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4472ac27a0ecSDave Kleikamp } else { 44737edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block; 4474ac27a0ecSDave Kleikamp } 4475ac27a0ecSDave Kleikamp 44768394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 44778394a6abSzhangyi (F) if (IS_ERR(bh)) { 4478b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 44798394a6abSzhangyi (F) ret = PTR_ERR(bh); 4480ac27a0ecSDave Kleikamp goto out_fail; 4481ac27a0ecSDave Kleikamp } 4482ac27a0ecSDave Kleikamp /* 4483ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4484617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4485ac27a0ecSDave Kleikamp */ 44862716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4487ac27a0ecSDave Kleikamp sbi->s_es = es; 4488ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4489617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4490617ba13bSMingming Cao goto cantfind_ext4; 4491afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4492ac27a0ecSDave Kleikamp 4493feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4494e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4495e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4496363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4497feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4498feb0ab32SDarrick J. Wong 4499d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4500d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4501d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4502d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4503d25425f8SDarrick J. Wong silent = 1; 4504d25425f8SDarrick J. Wong goto cantfind_ext4; 4505d25425f8SDarrick J. Wong } 450602f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 450702f310fcSJan Kara ext4_orphan_file_block_trigger); 4508d25425f8SDarrick J. Wong 45090441984aSDarrick J. Wong /* Load the checksum driver */ 45100441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 45110441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 45120441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 45130441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 45140441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 45150441984aSDarrick J. Wong goto failed_mount; 45160441984aSDarrick J. Wong } 45170441984aSDarrick J. Wong 4518a9c47317SDarrick J. Wong /* Check superblock checksum */ 4519a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4520a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4521a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4522a9c47317SDarrick J. Wong silent = 1; 45236a797d27SDarrick J. Wong ret = -EFSBADCRC; 4524a9c47317SDarrick J. Wong goto cantfind_ext4; 4525a9c47317SDarrick J. Wong } 4526a9c47317SDarrick J. Wong 4527a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4528e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 45298c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4530dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4531a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4532a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4533a9c47317SDarrick J. Wong 4534ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4535ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4536fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4537617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4538fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 453987f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4540fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4541617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4542fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4543ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4544fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 454503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4546fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 45472e7842b8SHugh Dickins #endif 4548995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4549995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 455098c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 455198c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 455298c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 455398c1a759SDarrick J. Wong 4554617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4555fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4556617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4557fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4558617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4559fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4560ac27a0ecSDave Kleikamp 4561617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4562fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4563bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4564fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4565bb4f397aSAneesh Kumar K.V else 4566fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 456745f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4568fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 45698b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4570fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4571ac27a0ecSDave Kleikamp 457208cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 457308cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 457430773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 457530773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 457630773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4577ac27a0ecSDave Kleikamp 45788b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4579fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4580ac27a0ecSDave Kleikamp 45811e2462f9SMingming Cao /* 4582dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4583dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4584dd919b98SAneesh Kumar K.V */ 4585bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 45868b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4587fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4588dd919b98SAneesh Kumar K.V 458951ce6511SLukas Czerner /* 459051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 459151ce6511SLukas Czerner * no mount option specified. 459251ce6511SLukas Czerner */ 459351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 459451ce6511SLukas Czerner 4595c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4596c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4597c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4598c9200760STheodore Ts'o "Invalid log block size: %u", 4599c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4600c9200760STheodore Ts'o goto failed_mount; 4601c9200760STheodore Ts'o } 4602c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4603c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4604c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4605c9200760STheodore Ts'o "Invalid log cluster size: %u", 4606c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4607c9200760STheodore Ts'o goto failed_mount; 4608c9200760STheodore Ts'o } 4609c9200760STheodore Ts'o 4610c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4611626b035bSRitesh Harjani 4612626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4613626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4614626b035bSRitesh Harjani 46159803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 46169803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 46179803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 46189803387cSTheodore Ts'o } else { 46199803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 46209803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 46219803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 46229803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 46239803387cSTheodore Ts'o sbi->s_first_ino); 46249803387cSTheodore Ts'o goto failed_mount; 46259803387cSTheodore Ts'o } 46269803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 46279803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 46289803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 46299803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46309803387cSTheodore Ts'o "unsupported inode size: %d", 46319803387cSTheodore Ts'o sbi->s_inode_size); 46324f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 46339803387cSTheodore Ts'o goto failed_mount; 46349803387cSTheodore Ts'o } 46359803387cSTheodore Ts'o /* 46369803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 46379803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 46389803387cSTheodore Ts'o * field should suffice to ensure we have extra space 46399803387cSTheodore Ts'o * for all three. 46409803387cSTheodore Ts'o */ 46419803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 46429803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 46439803387cSTheodore Ts'o sb->s_time_gran = 1; 46449803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 46459803387cSTheodore Ts'o } else { 46469803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 46479803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 46489803387cSTheodore Ts'o } 46499803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 46509803387cSTheodore Ts'o } 46519803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 46529803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 46539803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 46549803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 46559803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 46569803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 46579803387cSTheodore Ts'o 46589803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 46599803387cSTheodore Ts'o if (v > max) { 46609803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46619803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 46629803387cSTheodore Ts'o goto failed_mount; 46639803387cSTheodore Ts'o } 46649803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46659803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46669803387cSTheodore Ts'o 46679803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 46689803387cSTheodore Ts'o if (v > max) { 46699803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46709803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 46719803387cSTheodore Ts'o goto failed_mount; 46729803387cSTheodore Ts'o } 46739803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46749803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46759803387cSTheodore Ts'o } 46769803387cSTheodore Ts'o } 46779803387cSTheodore Ts'o 46787edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 46797edfd85bSLukas Czerner if (err < 0) 46805aee0f8aSTheodore Ts'o goto failed_mount; 46817edfd85bSLukas Czerner 46825a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 46837edfd85bSLukas Czerner 46847edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 46857edfd85bSLukas Czerner if (err < 0) 46867edfd85bSLukas Czerner goto failed_mount; 46877edfd85bSLukas Czerner 46887edfd85bSLukas Czerner err = ext4_apply_options(fc, sb); 46897edfd85bSLukas Czerner if (err < 0) 4690ac27a0ecSDave Kleikamp goto failed_mount; 4691ac27a0ecSDave Kleikamp 4692c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4693f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4694c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4695c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4696c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4697c83ad55eSGabriel Krisman Bertazi 4698c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4699c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4700c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4701c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4702c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4703c83ad55eSGabriel Krisman Bertazi } 4704c83ad55eSGabriel Krisman Bertazi 4705c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4706c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4707c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4708c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4709c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4710c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4711c83ad55eSGabriel Krisman Bertazi encoding_flags); 4712c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4713c83ad55eSGabriel Krisman Bertazi } 4714c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4715c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4716c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4717c83ad55eSGabriel Krisman Bertazi 4718f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4719f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4720c83ad55eSGabriel Krisman Bertazi } 4721c83ad55eSGabriel Krisman Bertazi #endif 4722c83ad55eSGabriel Krisman Bertazi 472356889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4724556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4725781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4726244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4727556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 472856889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 472956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 473056889787STheodore Ts'o "both data=journal and delalloc"); 473156889787STheodore Ts'o goto failed_mount; 473256889787STheodore Ts'o } 4733fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4734923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4735923ae0ffSRoss Zwisler "both data=journal and dax"); 4736923ae0ffSRoss Zwisler goto failed_mount; 4737923ae0ffSRoss Zwisler } 473873b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 473973b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 474073b92a2aSSergey Karamov "encrypted files will use data=ordered " 474173b92a2aSSergey Karamov "instead of data journaling mode"); 474273b92a2aSSergey Karamov } 474356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 474456889787STheodore Ts'o clear_opt(sb, DELALLOC); 4745001e4a87STejun Heo } else { 4746001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 474756889787STheodore Ts'o } 474856889787STheodore Ts'o 47491751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 47501751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4751ac27a0ecSDave Kleikamp 4752617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4753e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4754e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4755e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4756b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4757b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4758b31e1552SEric Sandeen "running e2fsck is recommended"); 4759469108ffSTheodore Tso 4760ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4761ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4762e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4763ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4764ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4765ed3654ebSTheodore Ts'o goto failed_mount; 4766ed3654ebSTheodore Ts'o } 4767dec214d0STahsin Erdogan 4768dec214d0STahsin Erdogan /* 4769dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4770dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4771dec214d0STahsin Erdogan */ 4772dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4773dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4774dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4775dec214d0STahsin Erdogan goto failed_mount; 4776dec214d0STahsin Erdogan } 4777ed3654ebSTheodore Ts'o } 4778ed3654ebSTheodore Ts'o 47792035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 47802035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 47812035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 47822035e776STheodore Ts'o "using the ext4 subsystem"); 47832035e776STheodore Ts'o else { 47840d9366d6SEric Sandeen /* 47850d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47860d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 47870d9366d6SEric Sandeen */ 47880d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47890d9366d6SEric Sandeen goto failed_mount; 47902035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 47912035e776STheodore Ts'o "to feature incompatibilities"); 47922035e776STheodore Ts'o goto failed_mount; 47932035e776STheodore Ts'o } 47942035e776STheodore Ts'o } 47952035e776STheodore Ts'o 47962035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 47972035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 47982035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 47992035e776STheodore Ts'o "using the ext4 subsystem"); 48002035e776STheodore Ts'o else { 48010d9366d6SEric Sandeen /* 48020d9366d6SEric Sandeen * If we're probing be silent, if this looks like 48030d9366d6SEric Sandeen * it's actually an ext4 filesystem. 48040d9366d6SEric Sandeen */ 48050d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 48060d9366d6SEric Sandeen goto failed_mount; 48072035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 48082035e776STheodore Ts'o "to feature incompatibilities"); 48092035e776STheodore Ts'o goto failed_mount; 48102035e776STheodore Ts'o } 48112035e776STheodore Ts'o } 48122035e776STheodore Ts'o 4813469108ffSTheodore Tso /* 4814ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4815ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4816ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4817ac27a0ecSDave Kleikamp */ 4818bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4819ac27a0ecSDave Kleikamp goto failed_mount; 4820a13fb1a4SEric Sandeen 48215b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 48225b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 48235b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 48245b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 48255b9554dcSTheodore Ts'o goto failed_mount; 48265b9554dcSTheodore Ts'o } 48275b9554dcSTheodore Ts'o 48287edfd85bSLukas Czerner if (dax_supported(sbi->s_daxdev, sb->s_bdev, blocksize, 0, 4829bdd3c50dSChristoph Hellwig bdev_nr_sectors(sb->s_bdev))) 4830a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4831a8ab6d38SIra Weiny 4832fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4833559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4834559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4835559db4c6SRoss Zwisler " that may contain inline data"); 4836361d24d4SEric Sandeen goto failed_mount; 4837559db4c6SRoss Zwisler } 4838a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 483924f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4840361d24d4SEric Sandeen "DAX unsupported by block device."); 4841361d24d4SEric Sandeen goto failed_mount; 484224f3478dSDan Williams } 4843923ae0ffSRoss Zwisler } 4844923ae0ffSRoss Zwisler 4845e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 48466ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 48476ddb2447STheodore Ts'o es->s_encryption_level); 48486ddb2447STheodore Ts'o goto failed_mount; 48496ddb2447STheodore Ts'o } 48506ddb2447STheodore Ts'o 4851ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4852afd09b61SAlexey Makhalov /* 4853afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4854afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4855afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4856afd09b61SAlexey Makhalov */ 4857afd09b61SAlexey Makhalov brelse(bh); 4858ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4859ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4860b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4861ce40733cSAneesh Kumar K.V blocksize); 4862afd09b61SAlexey Makhalov bh = NULL; 4863ac27a0ecSDave Kleikamp goto failed_mount; 4864ac27a0ecSDave Kleikamp } 4865ac27a0ecSDave Kleikamp 48667edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 486770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 48688394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 48698394a6abSzhangyi (F) if (IS_ERR(bh)) { 4870b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4871b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 48728394a6abSzhangyi (F) ret = PTR_ERR(bh); 48738394a6abSzhangyi (F) bh = NULL; 4874ac27a0ecSDave Kleikamp goto failed_mount; 4875ac27a0ecSDave Kleikamp } 48762716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4877ac27a0ecSDave Kleikamp sbi->s_es = es; 4878617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4879b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4880b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4881ac27a0ecSDave Kleikamp goto failed_mount; 4882ac27a0ecSDave Kleikamp } 4883ac27a0ecSDave Kleikamp } 4884ac27a0ecSDave Kleikamp 4885e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4886f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4887f287a1a5STheodore Ts'o has_huge_files); 4888f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4889ac27a0ecSDave Kleikamp 48900d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4891e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 48928fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 48930d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4894d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4895b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4896b31e1552SEric Sandeen "unsupported descriptor size %lu", 48970d1ee42fSAlexandre Ratchov sbi->s_desc_size); 48980d1ee42fSAlexandre Ratchov goto failed_mount; 48990d1ee42fSAlexandre Ratchov } 49000d1ee42fSAlexandre Ratchov } else 49010d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 49020b8e58a1SAndreas Dilger 4903ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4904ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 49050b8e58a1SAndreas Dilger 4906617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4907ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4908617ba13bSMingming Cao goto cantfind_ext4; 4909cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4910cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4911cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4912b9c538daSJosh Triplett sbi->s_inodes_per_group); 4913cd6bb35bSTheodore Ts'o goto failed_mount; 4914cd6bb35bSTheodore Ts'o } 4915ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4916ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 49170d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4918ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4919ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4920e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4921e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 49220b8e58a1SAndreas Dilger 4923ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4924ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4925ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4926e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4927f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4928f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4929f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4930f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4931f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4932bc98a42cSDavid Howells if (!sb_rdonly(sb)) 493323301410STheodore Ts'o es->s_flags |= 493423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4935f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4936f99b2589STheodore Ts'o #else 4937bc98a42cSDavid Howells if (!sb_rdonly(sb)) 493823301410STheodore Ts'o es->s_flags |= 493923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4940f99b2589STheodore Ts'o #endif 4941f99b2589STheodore Ts'o } 494223301410STheodore Ts'o } 4943ac27a0ecSDave Kleikamp 4944281b5995STheodore Ts'o /* Handle clustersize */ 4945281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4946ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4947281b5995STheodore Ts'o if (clustersize < blocksize) { 4948281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4949281b5995STheodore Ts'o "cluster size (%d) smaller than " 4950281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4951281b5995STheodore Ts'o goto failed_mount; 4952281b5995STheodore Ts'o } 4953281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4954281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4955281b5995STheodore Ts'o sbi->s_clusters_per_group = 4956281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4957281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4958281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4959281b5995STheodore Ts'o "#clusters per group too big: %lu", 4960281b5995STheodore Ts'o sbi->s_clusters_per_group); 4961281b5995STheodore Ts'o goto failed_mount; 4962281b5995STheodore Ts'o } 4963281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4964281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4965281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4966281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4967281b5995STheodore Ts'o sbi->s_blocks_per_group, 4968281b5995STheodore Ts'o sbi->s_clusters_per_group); 4969281b5995STheodore Ts'o goto failed_mount; 4970281b5995STheodore Ts'o } 4971281b5995STheodore Ts'o } else { 4972281b5995STheodore Ts'o if (clustersize != blocksize) { 4973bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4974bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4975bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4976bfe0a5f4STheodore Ts'o goto failed_mount; 4977281b5995STheodore Ts'o } 4978ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4979b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4980b31e1552SEric Sandeen "#blocks per group too big: %lu", 4981ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4982ac27a0ecSDave Kleikamp goto failed_mount; 4983ac27a0ecSDave Kleikamp } 4984281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4985281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4986281b5995STheodore Ts'o } 4987281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4988281b5995STheodore Ts'o 4989960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4990960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4991960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4992960fd856STheodore Ts'o 4993bf43d84bSEric Sandeen /* 4994bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4995bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4996bf43d84bSEric Sandeen */ 49975a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 499830ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 49995a9ae68aSDarrick J. Wong if (err) { 5000b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 5001bf43d84bSEric Sandeen " too large to mount safely on this system"); 5002ac27a0ecSDave Kleikamp goto failed_mount; 5003ac27a0ecSDave Kleikamp } 5004ac27a0ecSDave Kleikamp 5005617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 5006617ba13bSMingming Cao goto cantfind_ext4; 5007e7c95593SEric Sandeen 50080f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 50095513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 50100f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 5011b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 5012b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 50130f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 50140f2ddca6SFrom: Thiemo Nagel goto failed_mount; 50150f2ddca6SFrom: Thiemo Nagel } 50160f2ddca6SFrom: Thiemo Nagel 50174ec11028STheodore Ts'o /* 50184ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 50194ec11028STheodore Ts'o * of the filesystem. 50204ec11028STheodore Ts'o */ 50214ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 5022b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 5023b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 5024e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 50254ec11028STheodore Ts'o ext4_blocks_count(es)); 5026e7c95593SEric Sandeen goto failed_mount; 5027e7c95593SEric Sandeen } 5028bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 5029bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 5030bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 5031bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 5032bfe0a5f4STheodore Ts'o goto failed_mount; 5033bfe0a5f4STheodore Ts'o } 5034bfe0a5f4STheodore Ts'o 5035bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 5036bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 5037bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 5038bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 50394ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 5040df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 50414ec11028STheodore Ts'o "(block count %llu, first data block %u, " 5042df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 50434ec11028STheodore Ts'o ext4_blocks_count(es), 50444ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 50454ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 50464ec11028STheodore Ts'o goto failed_mount; 50474ec11028STheodore Ts'o } 5048bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 5049fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 5050fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 50519e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 50529e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 50539e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 50549e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 50559e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 50569e463084STheodore Ts'o ret = -EINVAL; 50579e463084STheodore Ts'o goto failed_mount; 50589e463084STheodore Ts'o } 5059617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 5060617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 50613a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 50622ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 50633a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 50643a4b77cdSEryu Guan "first meta block group too large: %u " 50653a4b77cdSEryu Guan "(group descriptor block count %u)", 50663a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 50673a4b77cdSEryu Guan goto failed_mount; 50683a4b77cdSEryu Guan } 50693a4b77cdSEryu Guan } 50701d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 50711d0c3924STheodore Ts'o kvmalloc_array(db_count, 5072f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 50731d0c3924STheodore Ts'o GFP_KERNEL)); 5074ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 5075b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 50762cde417dSTheodore Ts'o ret = -ENOMEM; 5077ac27a0ecSDave Kleikamp goto failed_mount; 5078ac27a0ecSDave Kleikamp } 5079ac27a0ecSDave Kleikamp 5080705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 5081ac27a0ecSDave Kleikamp 508285c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 508385c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 508485c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 50855df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 508685c8f176SAndrew Perepechko } 508785c8f176SAndrew Perepechko 5088ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 50891d0c3924STheodore Ts'o struct buffer_head *bh; 50901d0c3924STheodore Ts'o 509170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 50928394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 50938394a6abSzhangyi (F) if (IS_ERR(bh)) { 5094b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5095b31e1552SEric Sandeen "can't read group descriptor %d", i); 5096ac27a0ecSDave Kleikamp db_count = i; 50978394a6abSzhangyi (F) ret = PTR_ERR(bh); 5098ac27a0ecSDave Kleikamp goto failed_mount2; 5099ac27a0ecSDave Kleikamp } 51001d0c3924STheodore Ts'o rcu_read_lock(); 51011d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 51021d0c3924STheodore Ts'o rcu_read_unlock(); 5103ac27a0ecSDave Kleikamp } 510444de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 5105829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 5106b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 51076a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 5108f9ae9cf5STheodore Ts'o goto failed_mount2; 5109ac27a0ecSDave Kleikamp } 5110772cb7c8SJose R. Santos 5111235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5112c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5113c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 511404496411STao Ma 5115a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5116eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5117ce7e010aSTheodore Ts'o goto failed_mount3; 5118ce7e010aSTheodore Ts'o 5119c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 512067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5121c9de560dSAlex Tomas 5122f9ae9cf5STheodore Ts'o /* 5123f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5124f9ae9cf5STheodore Ts'o */ 5125f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5126617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5127617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5128643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5129a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5130ffcc4182SEric Biggers #endif 5131c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5132c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5133c93d8f88SEric Biggers #endif 5134ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5135617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5136e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 51371fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5138262b4662SJan Kara else 5139262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5140689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5141ac27a0ecSDave Kleikamp #endif 514285787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5143f2fa2ffcSAneesh Kumar K.V 5144ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 51453b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5146ac27a0ecSDave Kleikamp 5147aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 5148aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 5149aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_ineligible_updates, 0); 5150aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 5151aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 5152aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 5153aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 5154aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 51559b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 51569b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 5157aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 5158aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 51598016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 51608016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 51618016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 51628016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 51638016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 51648016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 51658016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 5166aa75f4d3SHarshad Shirwadkar 5167ac27a0ecSDave Kleikamp sb->s_root = NULL; 5168ac27a0ecSDave Kleikamp 5169ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 517002f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5171e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5172ac27a0ecSDave Kleikamp 5173bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5174c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 517550460fe8SDarrick J. Wong goto failed_mount3a; 5176c5e06d10SJohann Lombardi 5177ac27a0ecSDave Kleikamp /* 5178ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5179ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5180ac27a0ecSDave Kleikamp */ 5181e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 51827edfd85bSLukas Czerner err = ext4_load_journal(sb, es, ctx->journal_devnum); 51834753d8a2STheodore Ts'o if (err) 518450460fe8SDarrick J. Wong goto failed_mount3a; 5185bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5186e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5187b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5188b31e1552SEric Sandeen "suppressed and not mounted read-only"); 5189744692dcSJiaying Zhang goto failed_mount_wq; 5190ac27a0ecSDave Kleikamp } else { 51911e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 51921e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 51931e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51941e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 51951e381f60SDmitry Monakhov goto failed_mount_wq; 51961e381f60SDmitry Monakhov } 51971e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 51981e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51991e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 52001e381f60SDmitry Monakhov goto failed_mount_wq; 52011e381f60SDmitry Monakhov } 52021e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 52031e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 52041e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 52051e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 52061e381f60SDmitry Monakhov goto failed_mount_wq; 52071e381f60SDmitry Monakhov } 52081e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 52091e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 52101e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 52111e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 52121e381f60SDmitry Monakhov goto failed_mount_wq; 52131e381f60SDmitry Monakhov } 521450b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 52151e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5216fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5217995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 52180390131bSFrank Mayhar sbi->s_journal = NULL; 52190390131bSFrank Mayhar needs_recovery = 0; 52200390131bSFrank Mayhar goto no_journal; 5221ac27a0ecSDave Kleikamp } 5222ac27a0ecSDave Kleikamp 5223e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5224eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5225eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5226b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5227744692dcSJiaying Zhang goto failed_mount_wq; 5228eb40a09cSJose R. Santos } 5229eb40a09cSJose R. Santos 523025ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 523125ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 523225ed6e8aSDarrick J. Wong "feature set"); 523325ed6e8aSDarrick J. Wong goto failed_mount_wq; 5234d4da6c9cSLinus Torvalds } 5235818d276cSGirish Shilamkar 5236a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5237a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5238a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5239a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5240a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5241a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5242a1e5e465SHarshad Shirwadkar } 5243a1e5e465SHarshad Shirwadkar 5244ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5245ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5246ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5247ac27a0ecSDave Kleikamp case 0: 5248ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 524963f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 525063f57933SAndrew Morton * cope, else JOURNAL_DATA 525163f57933SAndrew Morton */ 5252dab291afSMingming Cao if (jbd2_journal_check_available_features 525327f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5254fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 525527f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 525627f394a7STyson Nottingham } else { 5257fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 525827f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 525927f394a7STyson Nottingham } 5260ac27a0ecSDave Kleikamp break; 5261ac27a0ecSDave Kleikamp 5262617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5263617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5264dab291afSMingming Cao if (!jbd2_journal_check_available_features 5265dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5266b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5267b31e1552SEric Sandeen "requested data journaling mode"); 5268744692dcSJiaying Zhang goto failed_mount_wq; 5269ac27a0ecSDave Kleikamp } 52705a150bdeSGustavo A. R. Silva break; 5271ac27a0ecSDave Kleikamp default: 5272ac27a0ecSDave Kleikamp break; 5273ac27a0ecSDave Kleikamp } 5274ab04df78SJan Kara 5275ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5276ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5277ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5278ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5279ab04df78SJan Kara goto failed_mount_wq; 5280ab04df78SJan Kara } 5281ab04df78SJan Kara 52827edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 5283ac27a0ecSDave Kleikamp 5284342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5285afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5286342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5287afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 528818aadd47SBobi Jam 5289ce7e010aSTheodore Ts'o no_journal: 5290cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 529147387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 529247387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5293cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5294cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 52959c191f70ST Makphaibulchoke goto failed_mount_wq; 52969c191f70ST Makphaibulchoke } 52979c191f70ST Makphaibulchoke 5298dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5299dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5300dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5301dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5302dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5303dec214d0STahsin Erdogan goto failed_mount_wq; 5304dec214d0STahsin Erdogan } 5305dec214d0STahsin Erdogan } 5306cdb7ee4cSTahsin Erdogan } 5307dec214d0STahsin Erdogan 5308c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5309c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5310c93d8f88SEric Biggers goto failed_mount_wq; 5311c93d8f88SEric Biggers } 5312c93d8f88SEric Biggers 5313bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 5314e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 5315e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 53164392fbc4SJan Kara ext4_commit_super(sb); 53176ddb2447STheodore Ts'o } 53186ddb2447STheodore Ts'o 5319fd89d5f2STejun Heo /* 5320952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5321952fc18eSTheodore Ts'o * superblock if present. 5322952fc18eSTheodore Ts'o */ 5323952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 5324952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 5325952fc18eSTheodore Ts'o else { 532607aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 532707aa2ea1SLukas Czerner if (err) 5328952fc18eSTheodore Ts'o goto failed_mount_wq; 5329952fc18eSTheodore Ts'o } 5330952fc18eSTheodore Ts'o 5331952fc18eSTheodore Ts'o /* 5332fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5333fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5334fd89d5f2STejun Heo */ 53352e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 53362e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 53372e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 53382e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 533907aa2ea1SLukas Czerner ret = -ENOMEM; 53402e8fa54eSJan Kara goto failed_mount4; 53412e8fa54eSJan Kara } 53422e8fa54eSJan Kara 5343ac27a0ecSDave Kleikamp /* 5344dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5345ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5346ac27a0ecSDave Kleikamp */ 5347ac27a0ecSDave Kleikamp 53488a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 53491d1fe1eeSDavid Howells if (IS_ERR(root)) { 5350b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 53511d1fe1eeSDavid Howells ret = PTR_ERR(root); 535232a9bb57SManish Katiyar root = NULL; 5353ac27a0ecSDave Kleikamp goto failed_mount4; 5354ac27a0ecSDave Kleikamp } 5355ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5356b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 535794bf608aSAl Viro iput(root); 5358ac27a0ecSDave Kleikamp goto failed_mount4; 5359ac27a0ecSDave Kleikamp } 5360b886ee3eSGabriel Krisman Bertazi 536148fde701SAl Viro sb->s_root = d_make_root(root); 53621d1fe1eeSDavid Howells if (!sb->s_root) { 5363b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 53641d1fe1eeSDavid Howells ret = -ENOMEM; 53651d1fe1eeSDavid Howells goto failed_mount4; 53661d1fe1eeSDavid Howells } 5367ac27a0ecSDave Kleikamp 5368c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5369c89128a0SJaegeuk Kim if (ret == -EROFS) { 53701751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5371c89128a0SJaegeuk Kim ret = 0; 5372c89128a0SJaegeuk Kim } else if (ret) 5373c89128a0SJaegeuk Kim goto failed_mount4a; 5374ef7f3835SKalpak Shah 5375b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 537627dd4385SLukas Czerner 53770f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 53786fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 53796fd058f7STheodore Ts'o if (err) { 5380b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5381fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5382f9ae9cf5STheodore Ts'o goto failed_mount4a; 5383f9ae9cf5STheodore Ts'o } 53840f5bde1dSJan Kara } 53858016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5386f9ae9cf5STheodore Ts'o 5387f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5388196e402aSHarshad Shirwadkar 5389196e402aSHarshad Shirwadkar /* 5390196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5391196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5392196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5393196e402aSHarshad Shirwadkar */ 53947edfd85bSLukas Czerner if (ctx->mb_optimize_scan == 1) 5395196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 53967edfd85bSLukas Czerner else if (ctx->mb_optimize_scan == 0) 5397196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5398196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5399196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5400196e402aSHarshad Shirwadkar 5401f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5402f9ae9cf5STheodore Ts'o if (err) { 5403f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5404f9ae9cf5STheodore Ts'o err); 5405dcf2d804STao Ma goto failed_mount5; 5406c2774d84SAneesh Kumar K.V } 5407c2774d84SAneesh Kumar K.V 5408027f14f5STheodore Ts'o /* 5409027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5410027f14f5STheodore Ts'o * mballoc is initialized 5411027f14f5STheodore Ts'o */ 5412027f14f5STheodore Ts'o if (sbi->s_journal) 5413027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5414027f14f5STheodore Ts'o ext4_journal_commit_callback; 5415027f14f5STheodore Ts'o 5416d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5417d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5418d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5419908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5420908c7f19STejun Heo GFP_KERNEL); 5421d5e03cbbSTheodore Ts'o if (!err) { 5422d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5423d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5424908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5425908c7f19STejun Heo GFP_KERNEL); 5426d5e03cbbSTheodore Ts'o } 5427b2bbb92fSJan Kara /* 5428b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5429b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5430b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5431b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5432b2bbb92fSJan Kara * after it is mounted can fail. 5433b2bbb92fSJan Kara */ 5434b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5435d5e03cbbSTheodore Ts'o if (!err) 5436d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5437908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5438d5e03cbbSTheodore Ts'o if (!err) 5439908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5440908c7f19STejun Heo GFP_KERNEL); 5441c8585c6fSDaeho Jeong if (!err) 5442efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5443efc61345SEric Whitney GFP_KERNEL); 5444efc61345SEric Whitney if (!err) 5445bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5446c8585c6fSDaeho Jeong 5447d5e03cbbSTheodore Ts'o if (err) { 5448d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5449d5e03cbbSTheodore Ts'o goto failed_mount6; 5450d5e03cbbSTheodore Ts'o } 5451d5e03cbbSTheodore Ts'o 5452e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5453d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5454d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5455d5e03cbbSTheodore Ts'o "unable to initialize " 5456d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 54578f6840c4SYang Yingliang ret = -ENOMEM; 5458d5e03cbbSTheodore Ts'o goto failed_mount6; 5459d5e03cbbSTheodore Ts'o } 5460d5e03cbbSTheodore Ts'o 5461bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5462bfff6873SLukas Czerner if (err) 5463dcf2d804STao Ma goto failed_mount6; 5464bfff6873SLukas Czerner 5465b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5466dcf2d804STao Ma if (err) 5467dcf2d804STao Ma goto failed_mount7; 54683197ebdbSTheodore Ts'o 546902f310fcSJan Kara err = ext4_init_orphan_info(sb); 547002f310fcSJan Kara if (err) 547102f310fcSJan Kara goto failed_mount8; 54729b2ff357SJan Kara #ifdef CONFIG_QUOTA 54739b2ff357SJan Kara /* Enable quota usage during mount. */ 5474bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 54759b2ff357SJan Kara err = ext4_enable_quotas(sb); 54769b2ff357SJan Kara if (err) 547702f310fcSJan Kara goto failed_mount9; 54789b2ff357SJan Kara } 54799b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 54809b2ff357SJan Kara 5481bc71726cSzhangyi (F) /* 5482bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5483bc71726cSzhangyi (F) * used to detect the metadata async write error. 5484bc71726cSzhangyi (F) */ 5485bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5486bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5487bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5488bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5489617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5490617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5491617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 54920390131bSFrank Mayhar if (needs_recovery) { 5493b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 549411215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 549511215630SJan Kara if (err) 549602f310fcSJan Kara goto failed_mount9; 54970390131bSFrank Mayhar } 54980390131bSFrank Mayhar 549979add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 550079add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 550179add3a3SLukas Czerner if (!blk_queue_discard(q)) 550279add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 550379add3a3SLukas Czerner "mounting with \"discard\" option, but " 550479add3a3SLukas Czerner "the device does not support discard"); 550579add3a3SLukas Czerner } 550679add3a3SLukas Czerner 550766e61a9eSTheodore Ts'o if (es->s_error_count) 550866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5509ac27a0ecSDave Kleikamp 5510efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5511efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5512efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5513efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 55141cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 55151cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5516efbed4dcSTheodore Ts'o 5517ac27a0ecSDave Kleikamp return 0; 5518ac27a0ecSDave Kleikamp 5519617ba13bSMingming Cao cantfind_ext4: 5520ac27a0ecSDave Kleikamp if (!silent) 5521b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5522ac27a0ecSDave Kleikamp goto failed_mount; 5523ac27a0ecSDave Kleikamp 552402f310fcSJan Kara failed_mount9: 552502f310fcSJan Kara ext4_release_orphan_info(sb); 552672ba7450STheodore Ts'o failed_mount8: 5527ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5528cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5529dcf2d804STao Ma failed_mount7: 5530dcf2d804STao Ma ext4_unregister_li_request(sb); 5531dcf2d804STao Ma failed_mount6: 5532f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 55337c990728SSuraj Jitindar Singh rcu_read_lock(); 55347c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 55357c990728SSuraj Jitindar Singh if (flex_groups) { 55367c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 55377c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 55387c990728SSuraj Jitindar Singh kvfree(flex_groups); 55397c990728SSuraj Jitindar Singh } 55407c990728SSuraj Jitindar Singh rcu_read_unlock(); 5541d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5542d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5543d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5544d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5545efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5546bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 554700764937SAzat Khuzhin failed_mount5: 5548f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5549f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5550f9ae9cf5STheodore Ts'o failed_mount4a: 555194bf608aSAl Viro dput(sb->s_root); 555232a9bb57SManish Katiyar sb->s_root = NULL; 555394bf608aSAl Viro failed_mount4: 5554b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 55552e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 55562e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 55574c0425ffSMingming Cao failed_mount_wq: 5558dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5559dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 556050c15df6SChengguang Xu 556147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 556247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 556350c15df6SChengguang Xu 55640390131bSFrank Mayhar if (sbi->s_journal) { 5565bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5566bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5567dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 556847b4a50bSJan Kara sbi->s_journal = NULL; 55690390131bSFrank Mayhar } 557050460fe8SDarrick J. Wong failed_mount3a: 5571d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5572eb68d0e2SZheng Liu failed_mount3: 5573bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5574c92dc856SJan Kara flush_work(&sbi->s_error_work); 55752a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5576618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5577ac27a0ecSDave Kleikamp failed_mount2: 55781d0c3924STheodore Ts'o rcu_read_lock(); 55791d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5580ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 55811d0c3924STheodore Ts'o brelse(group_desc[i]); 55821d0c3924STheodore Ts'o kvfree(group_desc); 55831d0c3924STheodore Ts'o rcu_read_unlock(); 5584ac27a0ecSDave Kleikamp failed_mount: 55850441984aSDarrick J. Wong if (sbi->s_chksum_driver) 55860441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5587c83ad55eSGabriel Krisman Bertazi 5588c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5589f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5590c83ad55eSGabriel Krisman Bertazi #endif 5591c83ad55eSGabriel Krisman Bertazi 5592ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5593a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 55940ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5595ac27a0ecSDave Kleikamp #endif 5596ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5597afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5598ac27a0ecSDave Kleikamp brelse(bh); 5599afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5600ac27a0ecSDave Kleikamp out_fail: 5601ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 560207aa2ea1SLukas Czerner return err ? err : ret; 5603ac27a0ecSDave Kleikamp } 5604ac27a0ecSDave Kleikamp 56057edfd85bSLukas Czerner static void cleanup_ctx(struct ext4_fs_context *ctx) 56067edfd85bSLukas Czerner { 56077edfd85bSLukas Czerner int i; 56087edfd85bSLukas Czerner 56097edfd85bSLukas Czerner if (!ctx) 56107edfd85bSLukas Czerner return; 56117edfd85bSLukas Czerner 56127edfd85bSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 56137edfd85bSLukas Czerner kfree(ctx->s_qf_names[i]); 56147edfd85bSLukas Czerner } 56157edfd85bSLukas Czerner 56167edfd85bSLukas Czerner kfree(ctx->test_dummy_enc_arg); 56177edfd85bSLukas Czerner } 56187edfd85bSLukas Czerner 56197edfd85bSLukas Czerner static int ext4_fill_super(struct super_block *sb, void *data, int silent) 56207edfd85bSLukas Czerner { 56217edfd85bSLukas Czerner struct ext4_fs_context ctx; 56227edfd85bSLukas Czerner struct ext4_sb_info *sbi; 56237edfd85bSLukas Czerner struct fs_context fc; 56247edfd85bSLukas Czerner const char *descr; 56257edfd85bSLukas Czerner char *orig_data; 56267edfd85bSLukas Czerner int ret = -ENOMEM; 56277edfd85bSLukas Czerner 56287edfd85bSLukas Czerner orig_data = kstrdup(data, GFP_KERNEL); 56297edfd85bSLukas Czerner if (data && !orig_data) 56307edfd85bSLukas Czerner return -ENOMEM; 56317edfd85bSLukas Czerner 56327edfd85bSLukas Czerner /* Cleanup superblock name */ 56337edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 56347edfd85bSLukas Czerner 56357edfd85bSLukas Czerner memset(&fc, 0, sizeof(fc)); 56367edfd85bSLukas Czerner memset(&ctx, 0, sizeof(ctx)); 56377edfd85bSLukas Czerner fc.fs_private = &ctx; 56387edfd85bSLukas Czerner 56397edfd85bSLukas Czerner ret = parse_options(&fc, (char *) data); 56407edfd85bSLukas Czerner if (ret < 0) 56417edfd85bSLukas Czerner goto free_data; 56427edfd85bSLukas Czerner 56437edfd85bSLukas Czerner sbi = ext4_alloc_sbi(sb); 56447edfd85bSLukas Czerner if (!sbi) { 56457edfd85bSLukas Czerner ret = -ENOMEM; 56467edfd85bSLukas Czerner goto free_data; 56477edfd85bSLukas Czerner } 56487edfd85bSLukas Czerner 56497edfd85bSLukas Czerner fc.s_fs_info = sbi; 56507edfd85bSLukas Czerner 56517edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 56527edfd85bSLukas Czerner if (ctx.spec & EXT4_SPEC_s_sb_block) 56537edfd85bSLukas Czerner sbi->s_sb_block = ctx.s_sb_block; 56547edfd85bSLukas Czerner 56557edfd85bSLukas Czerner ret = __ext4_fill_super(&fc, sb, silent); 56567edfd85bSLukas Czerner if (ret < 0) 56577edfd85bSLukas Czerner goto free_sbi; 56587edfd85bSLukas Czerner 56597edfd85bSLukas Czerner if (EXT4_SB(sb)->s_journal) { 56607edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 56617edfd85bSLukas Czerner descr = " journalled data mode"; 56627edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 56637edfd85bSLukas Czerner descr = " ordered data mode"; 56647edfd85bSLukas Czerner else 56657edfd85bSLukas Czerner descr = " writeback data mode"; 56667edfd85bSLukas Czerner } else 56677edfd85bSLukas Czerner descr = "out journal"; 56687edfd85bSLukas Czerner 56697edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 56707edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 56717edfd85bSLukas Czerner "Opts: %.*s%s%s. Quota mode: %s.", descr, 56727edfd85bSLukas Czerner (int) sizeof(sbi->s_es->s_mount_opts), 56737edfd85bSLukas Czerner sbi->s_es->s_mount_opts, 56747edfd85bSLukas Czerner *sbi->s_es->s_mount_opts ? "; " : "", orig_data, 56757edfd85bSLukas Czerner ext4_quota_mode(sb)); 56767edfd85bSLukas Czerner 56777edfd85bSLukas Czerner kfree(orig_data); 56787edfd85bSLukas Czerner cleanup_ctx(&ctx); 56797edfd85bSLukas Czerner return 0; 56807edfd85bSLukas Czerner free_sbi: 56817edfd85bSLukas Czerner ext4_free_sbi(sbi); 56827edfd85bSLukas Czerner free_data: 56837edfd85bSLukas Czerner kfree(orig_data); 56847edfd85bSLukas Czerner cleanup_ctx(&ctx); 56857edfd85bSLukas Czerner return ret; 56867edfd85bSLukas Czerner } 56877edfd85bSLukas Czerner 5688ac27a0ecSDave Kleikamp /* 5689ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5690ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5691ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5692ac27a0ecSDave Kleikamp */ 5693617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5694ac27a0ecSDave Kleikamp { 5695617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5696ac27a0ecSDave Kleikamp 5697ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 569830773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 569930773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 57006866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5701ac27a0ecSDave Kleikamp 5702a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5703ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5704dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5705ac27a0ecSDave Kleikamp else 5706dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 57075bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 57085bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 57095bf5683aSHidehiro Kawai else 57105bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5711a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5712ac27a0ecSDave Kleikamp } 5713ac27a0ecSDave Kleikamp 5714c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5715ac27a0ecSDave Kleikamp unsigned int journal_inum) 5716ac27a0ecSDave Kleikamp { 5717ac27a0ecSDave Kleikamp struct inode *journal_inode; 5718ac27a0ecSDave Kleikamp 5719c6cb7e77SEric Whitney /* 5720c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5721c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5722c6cb7e77SEric Whitney * will try to delete it. 5723c6cb7e77SEric Whitney */ 57248a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 57251d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5726b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5727ac27a0ecSDave Kleikamp return NULL; 5728ac27a0ecSDave Kleikamp } 5729ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5730ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5731ac27a0ecSDave Kleikamp iput(journal_inode); 5732b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5733ac27a0ecSDave Kleikamp return NULL; 5734ac27a0ecSDave Kleikamp } 5735ac27a0ecSDave Kleikamp 5736e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5737ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 57381d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5739b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5740ac27a0ecSDave Kleikamp iput(journal_inode); 5741ac27a0ecSDave Kleikamp return NULL; 5742ac27a0ecSDave Kleikamp } 5743c6cb7e77SEric Whitney return journal_inode; 5744c6cb7e77SEric Whitney } 5745c6cb7e77SEric Whitney 5746c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5747c6cb7e77SEric Whitney unsigned int journal_inum) 5748c6cb7e77SEric Whitney { 5749c6cb7e77SEric Whitney struct inode *journal_inode; 5750c6cb7e77SEric Whitney journal_t *journal; 5751c6cb7e77SEric Whitney 575211215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 575311215630SJan Kara return NULL; 5754c6cb7e77SEric Whitney 5755c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5756c6cb7e77SEric Whitney if (!journal_inode) 5757c6cb7e77SEric Whitney return NULL; 5758ac27a0ecSDave Kleikamp 5759dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5760ac27a0ecSDave Kleikamp if (!journal) { 5761b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5762ac27a0ecSDave Kleikamp iput(journal_inode); 5763ac27a0ecSDave Kleikamp return NULL; 5764ac27a0ecSDave Kleikamp } 5765ac27a0ecSDave Kleikamp journal->j_private = sb; 5766617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5767ac27a0ecSDave Kleikamp return journal; 5768ac27a0ecSDave Kleikamp } 5769ac27a0ecSDave Kleikamp 5770617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5771ac27a0ecSDave Kleikamp dev_t j_dev) 5772ac27a0ecSDave Kleikamp { 5773ac27a0ecSDave Kleikamp struct buffer_head *bh; 5774ac27a0ecSDave Kleikamp journal_t *journal; 5775617ba13bSMingming Cao ext4_fsblk_t start; 5776617ba13bSMingming Cao ext4_fsblk_t len; 5777ac27a0ecSDave Kleikamp int hblock, blocksize; 5778617ba13bSMingming Cao ext4_fsblk_t sb_block; 5779ac27a0ecSDave Kleikamp unsigned long offset; 5780617ba13bSMingming Cao struct ext4_super_block *es; 5781ac27a0ecSDave Kleikamp struct block_device *bdev; 5782ac27a0ecSDave Kleikamp 578311215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 578411215630SJan Kara return NULL; 57850390131bSFrank Mayhar 5786b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5787ac27a0ecSDave Kleikamp if (bdev == NULL) 5788ac27a0ecSDave Kleikamp return NULL; 5789ac27a0ecSDave Kleikamp 5790ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5791e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5792ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5793b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5794b31e1552SEric Sandeen "blocksize too small for journal device"); 5795ac27a0ecSDave Kleikamp goto out_bdev; 5796ac27a0ecSDave Kleikamp } 5797ac27a0ecSDave Kleikamp 5798617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5799617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5800ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5801ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5802b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5803b31e1552SEric Sandeen "external journal"); 5804ac27a0ecSDave Kleikamp goto out_bdev; 5805ac27a0ecSDave Kleikamp } 5806ac27a0ecSDave Kleikamp 58072716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5808617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5809ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5810617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5811b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5812b31e1552SEric Sandeen "bad superblock"); 5813ac27a0ecSDave Kleikamp brelse(bh); 5814ac27a0ecSDave Kleikamp goto out_bdev; 5815ac27a0ecSDave Kleikamp } 5816ac27a0ecSDave Kleikamp 5817df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5818df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5819df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5820df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5821df4763beSDarrick J. Wong "corrupt superblock"); 5822df4763beSDarrick J. Wong brelse(bh); 5823df4763beSDarrick J. Wong goto out_bdev; 5824df4763beSDarrick J. Wong } 5825df4763beSDarrick J. Wong 5826617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5827b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5828ac27a0ecSDave Kleikamp brelse(bh); 5829ac27a0ecSDave Kleikamp goto out_bdev; 5830ac27a0ecSDave Kleikamp } 5831ac27a0ecSDave Kleikamp 5832bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5833ac27a0ecSDave Kleikamp start = sb_block + 1; 5834ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5835ac27a0ecSDave Kleikamp 5836dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5837ac27a0ecSDave Kleikamp start, len, blocksize); 5838ac27a0ecSDave Kleikamp if (!journal) { 5839b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5840ac27a0ecSDave Kleikamp goto out_bdev; 5841ac27a0ecSDave Kleikamp } 5842ac27a0ecSDave Kleikamp journal->j_private = sb; 58432d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5844b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5845ac27a0ecSDave Kleikamp goto out_journal; 5846ac27a0ecSDave Kleikamp } 5847ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5848b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5849b31e1552SEric Sandeen "user (unsupported) - %d", 5850ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5851ac27a0ecSDave Kleikamp goto out_journal; 5852ac27a0ecSDave Kleikamp } 5853ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5854617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5855ac27a0ecSDave Kleikamp return journal; 58560b8e58a1SAndreas Dilger 5857ac27a0ecSDave Kleikamp out_journal: 5858dab291afSMingming Cao jbd2_journal_destroy(journal); 5859ac27a0ecSDave Kleikamp out_bdev: 5860617ba13bSMingming Cao ext4_blkdev_put(bdev); 5861ac27a0ecSDave Kleikamp return NULL; 5862ac27a0ecSDave Kleikamp } 5863ac27a0ecSDave Kleikamp 5864617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5865617ba13bSMingming Cao struct ext4_super_block *es, 5866ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5867ac27a0ecSDave Kleikamp { 5868ac27a0ecSDave Kleikamp journal_t *journal; 5869ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5870ac27a0ecSDave Kleikamp dev_t journal_dev; 5871ac27a0ecSDave Kleikamp int err = 0; 5872ac27a0ecSDave Kleikamp int really_read_only; 5873273108faSLukas Czerner int journal_dev_ro; 5874ac27a0ecSDave Kleikamp 587511215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 587611215630SJan Kara return -EFSCORRUPTED; 58770390131bSFrank Mayhar 5878ac27a0ecSDave Kleikamp if (journal_devnum && 5879ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5880b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5881b31e1552SEric Sandeen "numbers have changed"); 5882ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5883ac27a0ecSDave Kleikamp } else 5884ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5885ac27a0ecSDave Kleikamp 5886273108faSLukas Czerner if (journal_inum && journal_dev) { 5887273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5888273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5889273108faSLukas Czerner return -EINVAL; 5890273108faSLukas Czerner } 5891273108faSLukas Czerner 5892273108faSLukas Czerner if (journal_inum) { 5893273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5894273108faSLukas Czerner if (!journal) 5895273108faSLukas Czerner return -EINVAL; 5896273108faSLukas Czerner } else { 5897273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5898273108faSLukas Czerner if (!journal) 5899273108faSLukas Czerner return -EINVAL; 5900273108faSLukas Czerner } 5901273108faSLukas Czerner 5902273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5903273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5904273108faSLukas Czerner 5905273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5906273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5907273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5908273108faSLukas Czerner err = -EROFS; 5909273108faSLukas Czerner goto err_out; 5910273108faSLukas Czerner } 5911ac27a0ecSDave Kleikamp 5912ac27a0ecSDave Kleikamp /* 5913ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5914ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5915ac27a0ecSDave Kleikamp * can get read-write access to the device. 5916ac27a0ecSDave Kleikamp */ 5917e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5918bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5919b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5920b31e1552SEric Sandeen "required on readonly filesystem"); 5921ac27a0ecSDave Kleikamp if (really_read_only) { 5922b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5923d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5924d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5925273108faSLukas Czerner err = -EROFS; 5926273108faSLukas Czerner goto err_out; 5927ac27a0ecSDave Kleikamp } 5928b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5929b31e1552SEric Sandeen "be enabled during recovery"); 5930ac27a0ecSDave Kleikamp } 5931ac27a0ecSDave Kleikamp } 5932ac27a0ecSDave Kleikamp 593390576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5934b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 59354776004fSTheodore Ts'o 5936e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5937dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 59381c13d5c0STheodore Ts'o if (!err) { 59391c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 59401c13d5c0STheodore Ts'o if (save) 59411c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 59421c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5943dab291afSMingming Cao err = jbd2_journal_load(journal); 59441c13d5c0STheodore Ts'o if (save) 59451c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 59461c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 59471c13d5c0STheodore Ts'o kfree(save); 59481c13d5c0STheodore Ts'o } 5949ac27a0ecSDave Kleikamp 5950ac27a0ecSDave Kleikamp if (err) { 5951b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5952273108faSLukas Czerner goto err_out; 5953ac27a0ecSDave Kleikamp } 5954ac27a0ecSDave Kleikamp 5955617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 595611215630SJan Kara err = ext4_clear_journal_err(sb, es); 595711215630SJan Kara if (err) { 595811215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 595911215630SJan Kara jbd2_journal_destroy(journal); 596011215630SJan Kara return err; 596111215630SJan Kara } 5962ac27a0ecSDave Kleikamp 5963c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5964ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5965ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5966ac27a0ecSDave Kleikamp 5967ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 59684392fbc4SJan Kara ext4_commit_super(sb); 5969ac27a0ecSDave Kleikamp } 5970ac27a0ecSDave Kleikamp 5971ac27a0ecSDave Kleikamp return 0; 5972273108faSLukas Czerner 5973273108faSLukas Czerner err_out: 5974273108faSLukas Czerner jbd2_journal_destroy(journal); 5975273108faSLukas Czerner return err; 5976ac27a0ecSDave Kleikamp } 5977ac27a0ecSDave Kleikamp 59782d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 59792d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5980ac27a0ecSDave Kleikamp { 5981c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5982e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5983e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5984ac27a0ecSDave Kleikamp 598505c2c00fSJan Kara lock_buffer(sbh); 5986a17712c8SJon Derrick /* 598771290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 598871290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 598971290b36STheodore Ts'o * write time when we are mounting the root file system 599071290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 599171290b36STheodore Ts'o * for people who are east of GMT and who make their clock 599271290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 599371290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 599471290b36STheodore Ts'o * to complain and force a full file system check. 599571290b36STheodore Ts'o */ 59961751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 59976a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5998afc32f7eSTheodore Ts'o es->s_kbytes_written = 5999e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 60008446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 6001e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 6002e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 600357042651STheodore Ts'o ext4_free_blocks_count_set(es, 6004e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 6005e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 6006e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 60077f93cff9STheodore Ts'o es->s_free_inodes_count = 60087f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 6009e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 6010c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 6011c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 6012c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 6013c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6014c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 6015c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 6016c92dc856SJan Kara &es->s_first_error_time_hi, 6017c92dc856SJan Kara sbi->s_first_error_time); 6018c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 6019c92dc856SJan Kara sizeof(es->s_first_error_func)); 6020c92dc856SJan Kara es->s_first_error_line = 6021c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 6022c92dc856SJan Kara es->s_first_error_ino = 6023c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 6024c92dc856SJan Kara es->s_first_error_block = 6025c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 6026c92dc856SJan Kara es->s_first_error_errcode = 6027c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 6028c92dc856SJan Kara } 6029c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 6030c92dc856SJan Kara &es->s_last_error_time_hi, 6031c92dc856SJan Kara sbi->s_last_error_time); 6032c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 6033c92dc856SJan Kara sizeof(es->s_last_error_func)); 6034c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 6035c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 6036c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 6037c92dc856SJan Kara es->s_last_error_errcode = 6038c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 6039c92dc856SJan Kara /* 6040c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 6041c92dc856SJan Kara * started already 6042c92dc856SJan Kara */ 6043c92dc856SJan Kara if (!es->s_error_count) 6044c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 6045c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 6046c92dc856SJan Kara sbi->s_add_error_count = 0; 6047c92dc856SJan Kara } 6048c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 6049c92dc856SJan Kara 605006db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 60512d01ddc8SJan Kara unlock_buffer(sbh); 60522d01ddc8SJan Kara } 60532d01ddc8SJan Kara 60542d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 60552d01ddc8SJan Kara { 60562d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 60572d01ddc8SJan Kara int error = 0; 60582d01ddc8SJan Kara 6059f88f1466SFengnan Chang if (!sbh) 6060f88f1466SFengnan Chang return -EINVAL; 6061f88f1466SFengnan Chang if (block_device_ejected(sb)) 6062f88f1466SFengnan Chang return -ENODEV; 60632d01ddc8SJan Kara 60642d01ddc8SJan Kara ext4_update_super(sb); 60652d01ddc8SJan Kara 6066e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 60674743f839SPranay Kr. Srivastava /* 60684743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 60694743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 60704743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 60714743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 60724743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 60734743f839SPranay Kr. Srivastava * write and hope for the best. 60744743f839SPranay Kr. Srivastava */ 60754743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 60764743f839SPranay Kr. Srivastava "superblock detected"); 60774743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 60784743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 60794743f839SPranay Kr. Srivastava } 60802d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 6081ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 6082564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 608300473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 6084c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6085b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6086b31e1552SEric Sandeen "superblock"); 6087914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6088914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 6089914258bfSTheodore Ts'o } 6090c4be0c1dSTakashi Sato return error; 6091ac27a0ecSDave Kleikamp } 6092ac27a0ecSDave Kleikamp 6093ac27a0ecSDave Kleikamp /* 6094ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6095ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6096ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6097ac27a0ecSDave Kleikamp */ 609811215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6099617ba13bSMingming Cao struct ext4_super_block *es) 6100ac27a0ecSDave Kleikamp { 610111215630SJan Kara int err; 6102617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6103ac27a0ecSDave Kleikamp 6104e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 610511215630SJan Kara if (journal != NULL) { 610611215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 610711215630SJan Kara "mounted!"); 610811215630SJan Kara return -EFSCORRUPTED; 610911215630SJan Kara } 611011215630SJan Kara return 0; 61110390131bSFrank Mayhar } 6112dab291afSMingming Cao jbd2_journal_lock_updates(journal); 611301d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 611411215630SJan Kara if (err < 0) 61157ffe1ea8SHidehiro Kawai goto out; 61167ffe1ea8SHidehiro Kawai 611702f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 611802f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 611902f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 612002f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 612102f310fcSJan Kara err = -EFSCORRUPTED; 612202f310fcSJan Kara goto out; 612302f310fcSJan Kara } 6124e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 612502f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 61264392fbc4SJan Kara ext4_commit_super(sb); 6127ac27a0ecSDave Kleikamp } 61287ffe1ea8SHidehiro Kawai out: 6129dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 613011215630SJan Kara return err; 6131ac27a0ecSDave Kleikamp } 6132ac27a0ecSDave Kleikamp 6133ac27a0ecSDave Kleikamp /* 6134ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6135ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6136ac27a0ecSDave Kleikamp * main filesystem now. 6137ac27a0ecSDave Kleikamp */ 613811215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6139617ba13bSMingming Cao struct ext4_super_block *es) 6140ac27a0ecSDave Kleikamp { 6141ac27a0ecSDave Kleikamp journal_t *journal; 6142ac27a0ecSDave Kleikamp int j_errno; 6143ac27a0ecSDave Kleikamp const char *errstr; 6144ac27a0ecSDave Kleikamp 614511215630SJan Kara if (!ext4_has_feature_journal(sb)) { 614611215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 614711215630SJan Kara return -EFSCORRUPTED; 614811215630SJan Kara } 61490390131bSFrank Mayhar 6150617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6151ac27a0ecSDave Kleikamp 6152ac27a0ecSDave Kleikamp /* 6153ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6154617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6155ac27a0ecSDave Kleikamp */ 6156ac27a0ecSDave Kleikamp 6157dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6158ac27a0ecSDave Kleikamp if (j_errno) { 6159ac27a0ecSDave Kleikamp char nbuf[16]; 6160ac27a0ecSDave Kleikamp 6161617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 616212062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6163ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 616412062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6165ac27a0ecSDave Kleikamp 6166617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6167617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 61684392fbc4SJan Kara ext4_commit_super(sb); 6169ac27a0ecSDave Kleikamp 6170dab291afSMingming Cao jbd2_journal_clear_err(journal); 6171d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6172ac27a0ecSDave Kleikamp } 617311215630SJan Kara return 0; 6174ac27a0ecSDave Kleikamp } 6175ac27a0ecSDave Kleikamp 6176ac27a0ecSDave Kleikamp /* 6177ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6178ac27a0ecSDave Kleikamp * and wait on the commit. 6179ac27a0ecSDave Kleikamp */ 6180617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6181ac27a0ecSDave Kleikamp { 6182ac27a0ecSDave Kleikamp journal_t *journal; 6183ac27a0ecSDave Kleikamp 6184bc98a42cSDavid Howells if (sb_rdonly(sb)) 6185ac27a0ecSDave Kleikamp return 0; 6186ac27a0ecSDave Kleikamp 6187617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6188b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6189ac27a0ecSDave Kleikamp } 6190ac27a0ecSDave Kleikamp 6191617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6192ac27a0ecSDave Kleikamp { 619314ce0cb4STheodore Ts'o int ret = 0; 61949eddacf9SJan Kara tid_t target; 619506a407f1SDmitry Monakhov bool needs_barrier = false; 61968d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6197ac27a0ecSDave Kleikamp 619849598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 61990db1ff22STheodore Ts'o return 0; 62000db1ff22STheodore Ts'o 62019bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 62022e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6203a1177825SJan Kara /* 6204a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6205a1177825SJan Kara * no dirty dquots 6206a1177825SJan Kara */ 6207a1177825SJan Kara dquot_writeback_dquots(sb, -1); 620806a407f1SDmitry Monakhov /* 620906a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 621006a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 621106a407f1SDmitry Monakhov * transaction_commit will do it for us. 621206a407f1SDmitry Monakhov */ 6213bda32530STheodore Ts'o if (sbi->s_journal) { 621406a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 621506a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 621606a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 621706a407f1SDmitry Monakhov needs_barrier = true; 621806a407f1SDmitry Monakhov 62198d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6220ac27a0ecSDave Kleikamp if (wait) 6221bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6222bda32530STheodore Ts'o target); 62230390131bSFrank Mayhar } 6224bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6225bda32530STheodore Ts'o needs_barrier = true; 622606a407f1SDmitry Monakhov if (needs_barrier) { 622706a407f1SDmitry Monakhov int err; 6228c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 622906a407f1SDmitry Monakhov if (!ret) 623006a407f1SDmitry Monakhov ret = err; 623106a407f1SDmitry Monakhov } 623206a407f1SDmitry Monakhov 623306a407f1SDmitry Monakhov return ret; 623406a407f1SDmitry Monakhov } 623506a407f1SDmitry Monakhov 6236ac27a0ecSDave Kleikamp /* 6237ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6238ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6239be4f27d3SYongqiang Yang * 6240be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 62418e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 62428e8ad8a5SJan Kara * modifications. 6243ac27a0ecSDave Kleikamp */ 6244c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6245ac27a0ecSDave Kleikamp { 6246c4be0c1dSTakashi Sato int error = 0; 6247c4be0c1dSTakashi Sato journal_t *journal; 6248ac27a0ecSDave Kleikamp 6249bc98a42cSDavid Howells if (sb_rdonly(sb)) 62509ca92389STheodore Ts'o return 0; 62519ca92389STheodore Ts'o 6252c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6253ac27a0ecSDave Kleikamp 6254bb044576STheodore Ts'o if (journal) { 6255ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6256dab291afSMingming Cao jbd2_journal_lock_updates(journal); 62577ffe1ea8SHidehiro Kawai 62587ffe1ea8SHidehiro Kawai /* 6259bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6260bb044576STheodore Ts'o * flush the journal. 62617ffe1ea8SHidehiro Kawai */ 626201d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 62636b0310fbSEric Sandeen if (error < 0) 62646b0310fbSEric Sandeen goto out; 6265ac27a0ecSDave Kleikamp 6266ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6267e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 626802f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 626902f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6270c642dc9eSEric Sandeen } 6271c642dc9eSEric Sandeen 62724392fbc4SJan Kara error = ext4_commit_super(sb); 62736b0310fbSEric Sandeen out: 6274bb044576STheodore Ts'o if (journal) 62758e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6276bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 62776b0310fbSEric Sandeen return error; 6278ac27a0ecSDave Kleikamp } 6279ac27a0ecSDave Kleikamp 6280ac27a0ecSDave Kleikamp /* 6281ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6282ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6283ac27a0ecSDave Kleikamp */ 6284c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6285ac27a0ecSDave Kleikamp { 6286bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 62879ca92389STheodore Ts'o return 0; 62889ca92389STheodore Ts'o 6289c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 62909ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6291e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 629202f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 629302f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6294c642dc9eSEric Sandeen } 6295c642dc9eSEric Sandeen 62964392fbc4SJan Kara ext4_commit_super(sb); 6297c4be0c1dSTakashi Sato return 0; 6298ac27a0ecSDave Kleikamp } 6299ac27a0ecSDave Kleikamp 6300673c6100STheodore Ts'o /* 6301673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6302673c6100STheodore Ts'o */ 6303673c6100STheodore Ts'o struct ext4_mount_options { 6304673c6100STheodore Ts'o unsigned long s_mount_opt; 6305a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 630608cefc7aSEric W. Biederman kuid_t s_resuid; 630708cefc7aSEric W. Biederman kgid_t s_resgid; 6308673c6100STheodore Ts'o unsigned long s_commit_interval; 6309673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6310673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6311673c6100STheodore Ts'o int s_jquota_fmt; 6312a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6313673c6100STheodore Ts'o #endif 6314673c6100STheodore Ts'o }; 6315673c6100STheodore Ts'o 63167edfd85bSLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb, 63177edfd85bSLukas Czerner int *flags) 6318ac27a0ecSDave Kleikamp { 63197edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6320617ba13bSMingming Cao struct ext4_super_block *es; 6321617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6322f25391ebSLukas Czerner unsigned long old_sb_flags, vfs_flags; 6323617ba13bSMingming Cao struct ext4_mount_options old_opts; 63248a266467STheodore Ts'o ext4_group_t g; 6325c5e06d10SJohann Lombardi int err = 0; 6326ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 63273bbef91bSAustin Kim int enable_quota = 0; 632803dafb5fSChen Gang int i, j; 632933458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6330ac27a0ecSDave Kleikamp #endif 6331b237e304SHarshad Shirwadkar 63327edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 633321ac738eSChengguang Xu 6334ac27a0ecSDave Kleikamp /* Store the original options */ 6335ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6336ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6337a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6338ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6339ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6340ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 634130773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 634230773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6343ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6344ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6345a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 634603dafb5fSChen Gang if (sbi->s_qf_names[i]) { 634733458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 634833458eabSTheodore Ts'o 634933458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 635003dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 635103dafb5fSChen Gang for (j = 0; j < i; j++) 635203dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 635303dafb5fSChen Gang return -ENOMEM; 635403dafb5fSChen Gang } 635503dafb5fSChen Gang } else 635603dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6357ac27a0ecSDave Kleikamp #endif 6358b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 63597edfd85bSLukas Czerner ctx->journal_ioprio = 6360b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6361ac27a0ecSDave Kleikamp 6362f25391ebSLukas Czerner /* 6363f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6364f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6365f25391ebSLukas Czerner * s_flags. Copy those selected flags from *flags to s_flags 6366f25391ebSLukas Czerner */ 6367f25391ebSLukas Czerner vfs_flags = SB_LAZYTIME | SB_I_VERSION; 6368f25391ebSLukas Czerner sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags); 6369f25391ebSLukas Czerner 63707edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6371ac27a0ecSDave Kleikamp 63726b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 63736b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 63746b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 63752d5b86e0SEric Sandeen "during remount not supported; ignoring"); 63762d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6377c6d3d56dSDarrick J. Wong } 6378c6d3d56dSDarrick J. Wong 63796ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 63806ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 63816ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63826ae6514bSPiotr Sarna "both data=journal and delalloc"); 63836ae6514bSPiotr Sarna err = -EINVAL; 63846ae6514bSPiotr Sarna goto restore_opts; 63856ae6514bSPiotr Sarna } 63866ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 63876ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63886ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 63896ae6514bSPiotr Sarna err = -EINVAL; 63906ae6514bSPiotr Sarna goto restore_opts; 63916ae6514bSPiotr Sarna } 6392ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6393ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6394ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6395ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6396ab04df78SJan Kara err = -EINVAL; 6397ab04df78SJan Kara goto restore_opts; 6398ab04df78SJan Kara } 6399923ae0ffSRoss Zwisler } 6400923ae0ffSRoss Zwisler 6401cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6402cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6403cdb7ee4cSTahsin Erdogan err = -EINVAL; 6404cdb7ee4cSTahsin Erdogan goto restore_opts; 6405cdb7ee4cSTahsin Erdogan } 6406cdb7ee4cSTahsin Erdogan 64079b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6408124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6409ac27a0ecSDave Kleikamp 64101751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 64111751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6412ac27a0ecSDave Kleikamp 6413ac27a0ecSDave Kleikamp es = sbi->s_es; 6414ac27a0ecSDave Kleikamp 6415b3881f74STheodore Ts'o if (sbi->s_journal) { 6416617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 64177edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6418b3881f74STheodore Ts'o } 6419ac27a0ecSDave Kleikamp 6420c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6421c92dc856SJan Kara flush_work(&sbi->s_error_work); 6422c92dc856SJan Kara 64231751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 64249b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6425ac27a0ecSDave Kleikamp err = -EROFS; 6426ac27a0ecSDave Kleikamp goto restore_opts; 6427ac27a0ecSDave Kleikamp } 6428ac27a0ecSDave Kleikamp 64291751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 643038c03b34STheodore Ts'o err = sync_filesystem(sb); 643138c03b34STheodore Ts'o if (err < 0) 643238c03b34STheodore Ts'o goto restore_opts; 64330f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 64340f0dd62fSChristoph Hellwig if (err < 0) 6435c79d967dSChristoph Hellwig goto restore_opts; 6436c79d967dSChristoph Hellwig 6437ac27a0ecSDave Kleikamp /* 6438ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6439ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6440ac27a0ecSDave Kleikamp */ 64411751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6442ac27a0ecSDave Kleikamp 6443ac27a0ecSDave Kleikamp /* 6444ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6445ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6446ac27a0ecSDave Kleikamp * mark the partition as valid again. 6447ac27a0ecSDave Kleikamp */ 6448617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6449617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6450ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6451ac27a0ecSDave Kleikamp 645211215630SJan Kara if (sbi->s_journal) { 645311215630SJan Kara /* 645411215630SJan Kara * We let remount-ro finish even if marking fs 645511215630SJan Kara * as clean failed... 645611215630SJan Kara */ 6457617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 645811215630SJan Kara } 6459ac27a0ecSDave Kleikamp } else { 6460a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6461e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 64622cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6463ac27a0ecSDave Kleikamp err = -EROFS; 6464ac27a0ecSDave Kleikamp goto restore_opts; 6465ac27a0ecSDave Kleikamp } 6466ead6596bSEric Sandeen /* 64678a266467STheodore Ts'o * Make sure the group descriptor checksums 64680b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 64698a266467STheodore Ts'o */ 64708a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 64718a266467STheodore Ts'o struct ext4_group_desc *gdp = 64728a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 64738a266467STheodore Ts'o 6474feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6475b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6476b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6477e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 64788a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 64796a797d27SDarrick J. Wong err = -EFSBADCRC; 64808a266467STheodore Ts'o goto restore_opts; 64818a266467STheodore Ts'o } 64828a266467STheodore Ts'o } 64838a266467STheodore Ts'o 64848a266467STheodore Ts'o /* 6485ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6486ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6487ead6596bSEric Sandeen * require a full umount/remount for now. 6488ead6596bSEric Sandeen */ 648902f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6490b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6491ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6492ead6596bSEric Sandeen "orphan inode list. Please " 6493b31e1552SEric Sandeen "umount/remount instead"); 6494ead6596bSEric Sandeen err = -EINVAL; 6495ead6596bSEric Sandeen goto restore_opts; 6496ead6596bSEric Sandeen } 6497ead6596bSEric Sandeen 6498ac27a0ecSDave Kleikamp /* 6499ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6500ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6501ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6502ac27a0ecSDave Kleikamp * the partition.) 6503ac27a0ecSDave Kleikamp */ 650411215630SJan Kara if (sbi->s_journal) { 650511215630SJan Kara err = ext4_clear_journal_err(sb, es); 650611215630SJan Kara if (err) 650711215630SJan Kara goto restore_opts; 650811215630SJan Kara } 6509ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6510c89128a0SJaegeuk Kim 6511c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6512c89128a0SJaegeuk Kim if (err) 6513c89128a0SJaegeuk Kim goto restore_opts; 6514c89128a0SJaegeuk Kim 65151751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6516e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6517c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6518c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6519c5e06d10SJohann Lombardi err = -EROFS; 6520c5e06d10SJohann Lombardi goto restore_opts; 6521c5e06d10SJohann Lombardi } 65223bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6523c79d967dSChristoph Hellwig enable_quota = 1; 65243bbef91bSAustin Kim #endif 6525ac27a0ecSDave Kleikamp } 6526ac27a0ecSDave Kleikamp } 6527bfff6873SLukas Czerner 6528bfff6873SLukas Czerner /* 6529bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6530bfff6873SLukas Czerner * current settings 6531bfff6873SLukas Czerner */ 6532bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6533bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6534bfff6873SLukas Czerner else { 6535bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6536bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6537bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6538bfff6873SLukas Czerner } 6539bfff6873SLukas Czerner 65400f5bde1dSJan Kara /* 65410f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 65420f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 65430f5bde1dSJan Kara * succeed. 65440f5bde1dSJan Kara */ 6545dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6546d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6547d176b1f6SJan Kara if (err) 6548d176b1f6SJan Kara goto restore_opts; 65490f5bde1dSJan Kara } 6550d176b1f6SJan Kara 6551c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 65524392fbc4SJan Kara err = ext4_commit_super(sb); 6553c89128a0SJaegeuk Kim if (err) 6554c89128a0SJaegeuk Kim goto restore_opts; 6555c89128a0SJaegeuk Kim } 65560390131bSFrank Mayhar 6557ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6558ac27a0ecSDave Kleikamp /* Release old quota file names */ 6559a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6560ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 65617c319d32SAditya Kali if (enable_quota) { 65627c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 65630f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6564e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 65657c319d32SAditya Kali err = ext4_enable_quotas(sb); 656607724f98STheodore Ts'o if (err) 65677c319d32SAditya Kali goto restore_opts; 65687c319d32SAditya Kali } 65697c319d32SAditya Kali } 65707c319d32SAditya Kali #endif 6571dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65720f5bde1dSJan Kara ext4_release_system_zone(sb); 6573d4c402d9SCurt Wohlgemuth 657461bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 657561bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 657661bb4a1cSTheodore Ts'o 6577f25391ebSLukas Czerner /* 6578f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6579f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6580f25391ebSLukas Czerner * s_flags. Copy those selected flags from s_flags to *flags 6581f25391ebSLukas Czerner */ 6582f25391ebSLukas Czerner *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags); 6583f25391ebSLukas Czerner 6584ac27a0ecSDave Kleikamp return 0; 65850b8e58a1SAndreas Dilger 6586ac27a0ecSDave Kleikamp restore_opts: 6587ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6588ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6589a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6590ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6591ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6592ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 659330773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 659430773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6595dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65960f5bde1dSJan Kara ext4_release_system_zone(sb); 6597ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6598ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6599a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 660033458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 660133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6602ac27a0ecSDave Kleikamp } 660333458eabSTheodore Ts'o synchronize_rcu(); 660433458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 660533458eabSTheodore Ts'o kfree(to_free[i]); 6606ac27a0ecSDave Kleikamp #endif 660761bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 660861bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6609ac27a0ecSDave Kleikamp return err; 6610ac27a0ecSDave Kleikamp } 6611ac27a0ecSDave Kleikamp 66127edfd85bSLukas Czerner static int ext4_remount(struct super_block *sb, int *flags, char *data) 66137edfd85bSLukas Czerner { 66147edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 66157edfd85bSLukas Czerner struct ext4_fs_context ctx; 66167edfd85bSLukas Czerner struct fs_context fc; 66177edfd85bSLukas Czerner char *orig_data; 66187edfd85bSLukas Czerner int ret; 66197edfd85bSLukas Czerner 66207edfd85bSLukas Czerner orig_data = kstrdup(data, GFP_KERNEL); 66217edfd85bSLukas Czerner if (data && !orig_data) 66227edfd85bSLukas Czerner return -ENOMEM; 66237edfd85bSLukas Czerner 66247edfd85bSLukas Czerner memset(&fc, 0, sizeof(fc)); 66257edfd85bSLukas Czerner memset(&ctx, 0, sizeof(ctx)); 66267edfd85bSLukas Czerner 66277edfd85bSLukas Czerner fc.fs_private = &ctx; 66287edfd85bSLukas Czerner fc.purpose = FS_CONTEXT_FOR_RECONFIGURE; 66297edfd85bSLukas Czerner fc.s_fs_info = sbi; 66307edfd85bSLukas Czerner 66317edfd85bSLukas Czerner ret = parse_options(&fc, (char *) data); 66327edfd85bSLukas Czerner if (ret < 0) 66337edfd85bSLukas Czerner goto err_out; 66347edfd85bSLukas Czerner 66357edfd85bSLukas Czerner ret = ext4_check_opt_consistency(&fc, sb); 66367edfd85bSLukas Czerner if (ret < 0) 66377edfd85bSLukas Czerner goto err_out; 66387edfd85bSLukas Czerner 66397edfd85bSLukas Czerner ret = __ext4_remount(&fc, sb, flags); 66407edfd85bSLukas Czerner if (ret < 0) 66417edfd85bSLukas Czerner goto err_out; 66427edfd85bSLukas Czerner 66437edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.", 66447edfd85bSLukas Czerner orig_data, ext4_quota_mode(sb)); 66457edfd85bSLukas Czerner cleanup_ctx(&ctx); 66467edfd85bSLukas Czerner kfree(orig_data); 66477edfd85bSLukas Czerner return 0; 66487edfd85bSLukas Czerner 66497edfd85bSLukas Czerner err_out: 66507edfd85bSLukas Czerner cleanup_ctx(&ctx); 66517edfd85bSLukas Czerner kfree(orig_data); 66527edfd85bSLukas Czerner return ret; 66537edfd85bSLukas Czerner } 66547edfd85bSLukas Czerner 6655689c958cSLi Xi #ifdef CONFIG_QUOTA 6656689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6657689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6658689c958cSLi Xi { 6659689c958cSLi Xi struct kqid qid; 6660689c958cSLi Xi struct dquot *dquot; 6661689c958cSLi Xi u64 limit; 6662689c958cSLi Xi u64 curblock; 6663689c958cSLi Xi 6664689c958cSLi Xi qid = make_kqid_projid(projid); 6665689c958cSLi Xi dquot = dqget(sb, qid); 6666689c958cSLi Xi if (IS_ERR(dquot)) 6667689c958cSLi Xi return PTR_ERR(dquot); 66687b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6669689c958cSLi Xi 6670a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6671a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 667257c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 667357c32ea4SChengguang Xu 6674689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6675f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6676f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6677689c958cSLi Xi buf->f_blocks = limit; 6678689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6679689c958cSLi Xi (buf->f_blocks > curblock) ? 6680689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6681689c958cSLi Xi } 6682689c958cSLi Xi 6683a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6684a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6685689c958cSLi Xi if (limit && buf->f_files > limit) { 6686689c958cSLi Xi buf->f_files = limit; 6687689c958cSLi Xi buf->f_ffree = 6688689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6689689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6690689c958cSLi Xi } 6691689c958cSLi Xi 66927b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6693689c958cSLi Xi dqput(dquot); 6694689c958cSLi Xi return 0; 6695689c958cSLi Xi } 6696689c958cSLi Xi #endif 6697689c958cSLi Xi 6698617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6699ac27a0ecSDave Kleikamp { 6700ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6701617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6702617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 670327dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6704d02a9391SKazuya Mio s64 bfree; 670527dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6706ac27a0ecSDave Kleikamp 6707952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6708952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6709ac27a0ecSDave Kleikamp 6710617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6711ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6712b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 671357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 671457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6715d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 671657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 671727dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 671827dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 671927dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6720ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6721ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 672252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6723617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 67249591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 67250b8e58a1SAndreas Dilger 6726689c958cSLi Xi #ifdef CONFIG_QUOTA 6727689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6728689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6729689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6730689c958cSLi Xi #endif 6731ac27a0ecSDave Kleikamp return 0; 6732ac27a0ecSDave Kleikamp } 6733ac27a0ecSDave Kleikamp 6734ac27a0ecSDave Kleikamp 6735ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6736ac27a0ecSDave Kleikamp 6737bc8230eeSJan Kara /* 6738bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6739bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6740bc8230eeSJan Kara */ 6741ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6742ac27a0ecSDave Kleikamp { 67434c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6744ac27a0ecSDave Kleikamp } 6745ac27a0ecSDave Kleikamp 6746617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6747ac27a0ecSDave Kleikamp { 6748ac27a0ecSDave Kleikamp int ret, err; 6749ac27a0ecSDave Kleikamp handle_t *handle; 6750ac27a0ecSDave Kleikamp struct inode *inode; 6751ac27a0ecSDave Kleikamp 6752ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 67539924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6754617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6755ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6756ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6757ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6758617ba13bSMingming Cao err = ext4_journal_stop(handle); 6759ac27a0ecSDave Kleikamp if (!ret) 6760ac27a0ecSDave Kleikamp ret = err; 6761ac27a0ecSDave Kleikamp return ret; 6762ac27a0ecSDave Kleikamp } 6763ac27a0ecSDave Kleikamp 6764617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6765ac27a0ecSDave Kleikamp { 6766ac27a0ecSDave Kleikamp int ret, err; 6767ac27a0ecSDave Kleikamp handle_t *handle; 6768ac27a0ecSDave Kleikamp 67699924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6770617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6771ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6772ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6773ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6774617ba13bSMingming Cao err = ext4_journal_stop(handle); 6775ac27a0ecSDave Kleikamp if (!ret) 6776ac27a0ecSDave Kleikamp ret = err; 6777ac27a0ecSDave Kleikamp return ret; 6778ac27a0ecSDave Kleikamp } 6779ac27a0ecSDave Kleikamp 6780617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6781ac27a0ecSDave Kleikamp { 6782ac27a0ecSDave Kleikamp int ret, err; 6783ac27a0ecSDave Kleikamp handle_t *handle; 6784ac27a0ecSDave Kleikamp 67859924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6786617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 67879c3013e9SJan Kara if (IS_ERR(handle)) { 67889c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 67899c3013e9SJan Kara dquot_release(dquot); 6790ac27a0ecSDave Kleikamp return PTR_ERR(handle); 67919c3013e9SJan Kara } 6792ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6793617ba13bSMingming Cao err = ext4_journal_stop(handle); 6794ac27a0ecSDave Kleikamp if (!ret) 6795ac27a0ecSDave Kleikamp ret = err; 6796ac27a0ecSDave Kleikamp return ret; 6797ac27a0ecSDave Kleikamp } 6798ac27a0ecSDave Kleikamp 6799617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6800ac27a0ecSDave Kleikamp { 6801262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6802262b4662SJan Kara 6803f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6804ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6805617ba13bSMingming Cao return ext4_write_dquot(dquot); 6806ac27a0ecSDave Kleikamp } else { 6807ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6808ac27a0ecSDave Kleikamp } 6809ac27a0ecSDave Kleikamp } 6810ac27a0ecSDave Kleikamp 6811617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6812ac27a0ecSDave Kleikamp { 6813ac27a0ecSDave Kleikamp int ret, err; 6814ac27a0ecSDave Kleikamp handle_t *handle; 6815ac27a0ecSDave Kleikamp 6816ac27a0ecSDave Kleikamp /* Data block + inode block */ 68172b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6818ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6819ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6820ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6821617ba13bSMingming Cao err = ext4_journal_stop(handle); 6822ac27a0ecSDave Kleikamp if (!ret) 6823ac27a0ecSDave Kleikamp ret = err; 6824ac27a0ecSDave Kleikamp return ret; 6825ac27a0ecSDave Kleikamp } 6826ac27a0ecSDave Kleikamp 6827daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6828daf647d2STheodore Ts'o { 6829daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6830daf647d2STheodore Ts'o 6831daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6832daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6833daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6834daf647d2STheodore Ts'o * because the name of the lock is set using the 6835daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6836daf647d2STheodore Ts'o */ 6837daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6838daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6839daf647d2STheodore Ts'o } 6840daf647d2STheodore Ts'o 6841ac27a0ecSDave Kleikamp /* 6842ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6843ac27a0ecSDave Kleikamp */ 6844617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 68458c54ca9cSAl Viro const struct path *path) 6846ac27a0ecSDave Kleikamp { 6847ac27a0ecSDave Kleikamp int err; 6848ac27a0ecSDave Kleikamp 6849ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6850ac27a0ecSDave Kleikamp return -EINVAL; 68510623543bSJan Kara 6852ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6853d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6854ac27a0ecSDave Kleikamp return -EXDEV; 6855e0770e91SJan Kara 6856e0770e91SJan Kara /* Quota already enabled for this file? */ 6857e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6858e0770e91SJan Kara return -EBUSY; 6859e0770e91SJan Kara 68600623543bSJan Kara /* Journaling quota? */ 68610623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 68622b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6863f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6864b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6865b31e1552SEric Sandeen "Quota file not on filesystem root. " 6866b31e1552SEric Sandeen "Journaled quota will not work"); 686791389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 686891389240SJan Kara } else { 686991389240SJan Kara /* 687091389240SJan Kara * Clear the flag just in case mount options changed since 687191389240SJan Kara * last time. 687291389240SJan Kara */ 687391389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 68740623543bSJan Kara } 68750623543bSJan Kara 68760623543bSJan Kara /* 68770623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 68780623543bSJan Kara * all updates to the file when we bypass pagecache... 68790623543bSJan Kara */ 68800390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 68812b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 68820623543bSJan Kara /* 68830623543bSJan Kara * We don't need to lock updates but journal_flush() could 68840623543bSJan Kara * otherwise be livelocked... 68850623543bSJan Kara */ 68860623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 688701d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 68880623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6889f00c9e44SJan Kara if (err) 68907ffe1ea8SHidehiro Kawai return err; 68917ffe1ea8SHidehiro Kawai } 6892957153fcSJan Kara 6893daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6894daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6895957153fcSJan Kara if (err) { 6896daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6897daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6898957153fcSJan Kara } else { 6899957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6900957153fcSJan Kara handle_t *handle; 6901957153fcSJan Kara 690261a92987SJan Kara /* 690361a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 690461a92987SJan Kara * files. If this fails, we return success anyway since quotas 690561a92987SJan Kara * are already enabled and this is not a hard failure. 690661a92987SJan Kara */ 6907957153fcSJan Kara inode_lock(inode); 6908957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6909957153fcSJan Kara if (IS_ERR(handle)) 6910957153fcSJan Kara goto unlock_inode; 6911957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6912957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6913957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 69144209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6915957153fcSJan Kara ext4_journal_stop(handle); 6916957153fcSJan Kara unlock_inode: 6917957153fcSJan Kara inode_unlock(inode); 6918957153fcSJan Kara } 6919daf647d2STheodore Ts'o return err; 6920ac27a0ecSDave Kleikamp } 6921ac27a0ecSDave Kleikamp 69227c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 69237c319d32SAditya Kali unsigned int flags) 69247c319d32SAditya Kali { 69257c319d32SAditya Kali int err; 69267c319d32SAditya Kali struct inode *qf_inode; 6927a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 69287c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6929689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6930689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 69317c319d32SAditya Kali }; 69327c319d32SAditya Kali 6933e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 69347c319d32SAditya Kali 69357c319d32SAditya Kali if (!qf_inums[type]) 69367c319d32SAditya Kali return -EPERM; 69377c319d32SAditya Kali 69388a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 69397c319d32SAditya Kali if (IS_ERR(qf_inode)) { 69407c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 69417c319d32SAditya Kali return PTR_ERR(qf_inode); 69427c319d32SAditya Kali } 69437c319d32SAditya Kali 6944bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6945bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6946daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 69477212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6948daf647d2STheodore Ts'o if (err) 6949daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 695061157b24SPan Bian iput(qf_inode); 69517c319d32SAditya Kali 69527c319d32SAditya Kali return err; 69537c319d32SAditya Kali } 69547c319d32SAditya Kali 69557c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 695625c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 69577c319d32SAditya Kali { 69587c319d32SAditya Kali int type, err = 0; 6959a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 69607c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6961689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6962689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 69637c319d32SAditya Kali }; 696449da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 696549da9392SJan Kara test_opt(sb, USRQUOTA), 696649da9392SJan Kara test_opt(sb, GRPQUOTA), 696749da9392SJan Kara test_opt(sb, PRJQUOTA), 696849da9392SJan Kara }; 69697c319d32SAditya Kali 697091389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6971a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 69727c319d32SAditya Kali if (qf_inums[type]) { 69737c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 697449da9392SJan Kara DQUOT_USAGE_ENABLED | 697549da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 69767c319d32SAditya Kali if (err) { 69777c319d32SAditya Kali ext4_warning(sb, 697872ba7450STheodore Ts'o "Failed to enable quota tracking " 697972ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 698072ba7450STheodore Ts'o "e2fsck to fix.", type, err); 69817f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 69827f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 69837f144fd0SJunichi Uekawa 69847c319d32SAditya Kali return err; 69857c319d32SAditya Kali } 69867c319d32SAditya Kali } 69877c319d32SAditya Kali } 69887c319d32SAditya Kali return 0; 69897c319d32SAditya Kali } 69907c319d32SAditya Kali 6991ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6992ca0e05e4SDmitry Monakhov { 699321f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 699421f97697SJan Kara handle_t *handle; 6995957153fcSJan Kara int err; 699621f97697SJan Kara 699787009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 699887009d86SDmitry Monakhov * Caller already holds s_umount sem */ 699987009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 7000ca0e05e4SDmitry Monakhov sync_filesystem(sb); 7001ca0e05e4SDmitry Monakhov 7002957153fcSJan Kara if (!inode || !igrab(inode)) 70030b268590SAmir Goldstein goto out; 70040b268590SAmir Goldstein 7005957153fcSJan Kara err = dquot_quota_off(sb, type); 7006964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 7007957153fcSJan Kara goto out_put; 7008957153fcSJan Kara 7009957153fcSJan Kara inode_lock(inode); 701061a92987SJan Kara /* 701161a92987SJan Kara * Update modification times of quota files when userspace can 701261a92987SJan Kara * start looking at them. If we fail, we return success anyway since 701361a92987SJan Kara * this is not a hard failure and quotas are already disabled. 701461a92987SJan Kara */ 70159924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 70164209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 70174209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 7018957153fcSJan Kara goto out_unlock; 70194209ae12SHarshad Shirwadkar } 7020957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 7021957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 7022eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 70234209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 702421f97697SJan Kara ext4_journal_stop(handle); 7025957153fcSJan Kara out_unlock: 7026957153fcSJan Kara inode_unlock(inode); 7027957153fcSJan Kara out_put: 7028964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 7029957153fcSJan Kara iput(inode); 7030957153fcSJan Kara return err; 703121f97697SJan Kara out: 7032ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 7033ca0e05e4SDmitry Monakhov } 7034ca0e05e4SDmitry Monakhov 7035ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 7036ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 7037ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 7038ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 7039617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 7040ac27a0ecSDave Kleikamp size_t len, loff_t off) 7041ac27a0ecSDave Kleikamp { 7042ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7043725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 7044ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 7045ac27a0ecSDave Kleikamp int tocopy; 7046ac27a0ecSDave Kleikamp size_t toread; 7047ac27a0ecSDave Kleikamp struct buffer_head *bh; 7048ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 7049ac27a0ecSDave Kleikamp 7050ac27a0ecSDave Kleikamp if (off > i_size) 7051ac27a0ecSDave Kleikamp return 0; 7052ac27a0ecSDave Kleikamp if (off+len > i_size) 7053ac27a0ecSDave Kleikamp len = i_size-off; 7054ac27a0ecSDave Kleikamp toread = len; 7055ac27a0ecSDave Kleikamp while (toread > 0) { 7056ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 7057ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 70581c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 70591c215028STheodore Ts'o if (IS_ERR(bh)) 70601c215028STheodore Ts'o return PTR_ERR(bh); 7061ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 7062ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 7063ac27a0ecSDave Kleikamp else 7064ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 7065ac27a0ecSDave Kleikamp brelse(bh); 7066ac27a0ecSDave Kleikamp offset = 0; 7067ac27a0ecSDave Kleikamp toread -= tocopy; 7068ac27a0ecSDave Kleikamp data += tocopy; 7069ac27a0ecSDave Kleikamp blk++; 7070ac27a0ecSDave Kleikamp } 7071ac27a0ecSDave Kleikamp return len; 7072ac27a0ecSDave Kleikamp } 7073ac27a0ecSDave Kleikamp 7074ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 7075ac27a0ecSDave Kleikamp * enough credits) */ 7076617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 7077ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 7078ac27a0ecSDave Kleikamp { 7079ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7080725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 70814209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 7082c5e298aeSTheodore Ts'o int retries = 0; 7083ac27a0ecSDave Kleikamp struct buffer_head *bh; 7084ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 7085ac27a0ecSDave Kleikamp 70860390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 7087b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 7088b31e1552SEric Sandeen " cancelled because transaction is not started", 70899c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 70909c3013e9SJan Kara return -EIO; 70919c3013e9SJan Kara } 709267eeb568SDmitry Monakhov /* 709367eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 709467eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 709567eeb568SDmitry Monakhov */ 709667eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 709767eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 709867eeb568SDmitry Monakhov " cancelled because not block aligned", 709967eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 710067eeb568SDmitry Monakhov return -EIO; 710167eeb568SDmitry Monakhov } 710267eeb568SDmitry Monakhov 7103c5e298aeSTheodore Ts'o do { 7104c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7105c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7106c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 710745586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7108c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 71091c215028STheodore Ts'o if (IS_ERR(bh)) 71101c215028STheodore Ts'o return PTR_ERR(bh); 7111ac27a0ecSDave Kleikamp if (!bh) 7112ac27a0ecSDave Kleikamp goto out; 71135d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7114188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7115ac27a0ecSDave Kleikamp if (err) { 7116ac27a0ecSDave Kleikamp brelse(bh); 71171c215028STheodore Ts'o return err; 7118ac27a0ecSDave Kleikamp } 7119ac27a0ecSDave Kleikamp lock_buffer(bh); 712067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7121ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7122ac27a0ecSDave Kleikamp unlock_buffer(bh); 71230390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7124ac27a0ecSDave Kleikamp brelse(bh); 7125ac27a0ecSDave Kleikamp out: 712667eeb568SDmitry Monakhov if (inode->i_size < off + len) { 712767eeb568SDmitry Monakhov i_size_write(inode, off + len); 7128617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 71294209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 71304209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 71314209ae12SHarshad Shirwadkar err = err2; 713221f97697SJan Kara } 71334209ae12SHarshad Shirwadkar return err ? err : len; 7134ac27a0ecSDave Kleikamp } 7135ac27a0ecSDave Kleikamp #endif 7136ac27a0ecSDave Kleikamp 7137152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 7138152a0836SAl Viro const char *dev_name, void *data) 7139ac27a0ecSDave Kleikamp { 7140152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 7141ac27a0ecSDave Kleikamp } 7142ac27a0ecSDave Kleikamp 7143c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 714424b58424STheodore Ts'o static inline void register_as_ext2(void) 714524b58424STheodore Ts'o { 714624b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 714724b58424STheodore Ts'o if (err) 714824b58424STheodore Ts'o printk(KERN_WARNING 714924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 715024b58424STheodore Ts'o } 715124b58424STheodore Ts'o 715224b58424STheodore Ts'o static inline void unregister_as_ext2(void) 715324b58424STheodore Ts'o { 715424b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 715524b58424STheodore Ts'o } 71562035e776STheodore Ts'o 71572035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 71582035e776STheodore Ts'o { 7159e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 71602035e776STheodore Ts'o return 0; 7161bc98a42cSDavid Howells if (sb_rdonly(sb)) 71622035e776STheodore Ts'o return 1; 7163e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 71642035e776STheodore Ts'o return 0; 71652035e776STheodore Ts'o return 1; 71662035e776STheodore Ts'o } 716724b58424STheodore Ts'o #else 716824b58424STheodore Ts'o static inline void register_as_ext2(void) { } 716924b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 71702035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 717124b58424STheodore Ts'o #endif 717224b58424STheodore Ts'o 717324b58424STheodore Ts'o static inline void register_as_ext3(void) 717424b58424STheodore Ts'o { 717524b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 717624b58424STheodore Ts'o if (err) 717724b58424STheodore Ts'o printk(KERN_WARNING 717824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 717924b58424STheodore Ts'o } 718024b58424STheodore Ts'o 718124b58424STheodore Ts'o static inline void unregister_as_ext3(void) 718224b58424STheodore Ts'o { 718324b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 718424b58424STheodore Ts'o } 71852035e776STheodore Ts'o 71862035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 71872035e776STheodore Ts'o { 7188e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 71892035e776STheodore Ts'o return 0; 7190e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 71912035e776STheodore Ts'o return 0; 7192bc98a42cSDavid Howells if (sb_rdonly(sb)) 71932035e776STheodore Ts'o return 1; 7194e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 71952035e776STheodore Ts'o return 0; 71962035e776STheodore Ts'o return 1; 71972035e776STheodore Ts'o } 719824b58424STheodore Ts'o 719903010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7200ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 720103010a33STheodore Ts'o .name = "ext4", 7202152a0836SAl Viro .mount = ext4_mount, 7203ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 720414f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7205ac27a0ecSDave Kleikamp }; 72067f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7207ac27a0ecSDave Kleikamp 7208e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7209e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7210e9e3bcecSEric Sandeen 72115dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7212ac27a0ecSDave Kleikamp { 7213e9e3bcecSEric Sandeen int i, err; 7214c9de560dSAlex Tomas 7215e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 721607c0c5d8SAl Viro ext4_li_info = NULL; 721707c0c5d8SAl Viro 72189a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 721912e9b892SDmitry Monakhov ext4_check_flag_values(); 7220e9e3bcecSEric Sandeen 7221e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7222e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7223e9e3bcecSEric Sandeen 722451865fdaSZheng Liu err = ext4_init_es(); 72256fd058f7STheodore Ts'o if (err) 72266fd058f7STheodore Ts'o return err; 722751865fdaSZheng Liu 72281dc0aa46SEric Whitney err = ext4_init_pending(); 72291dc0aa46SEric Whitney if (err) 723022cfe4b4SEric Biggers goto out7; 723122cfe4b4SEric Biggers 723222cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 723322cfe4b4SEric Biggers if (err) 72341dc0aa46SEric Whitney goto out6; 72351dc0aa46SEric Whitney 723651865fdaSZheng Liu err = ext4_init_pageio(); 723751865fdaSZheng Liu if (err) 7238b5799018STheodore Ts'o goto out5; 723951865fdaSZheng Liu 72405dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7241bd2d0210STheodore Ts'o if (err) 7242b5799018STheodore Ts'o goto out4; 7243857ac889SLukas Czerner 7244b5799018STheodore Ts'o err = ext4_init_sysfs(); 7245dd68314cSTheodore Ts'o if (err) 7246b5799018STheodore Ts'o goto out3; 7247857ac889SLukas Czerner 72485dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7249ac27a0ecSDave Kleikamp if (err) 7250c9de560dSAlex Tomas goto out2; 7251ac27a0ecSDave Kleikamp err = init_inodecache(); 7252ac27a0ecSDave Kleikamp if (err) 7253ac27a0ecSDave Kleikamp goto out1; 7254aa75f4d3SHarshad Shirwadkar 7255aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7256aa75f4d3SHarshad Shirwadkar if (err) 7257aa75f4d3SHarshad Shirwadkar goto out05; 7258aa75f4d3SHarshad Shirwadkar 725924b58424STheodore Ts'o register_as_ext3(); 72602035e776STheodore Ts'o register_as_ext2(); 726103010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7262ac27a0ecSDave Kleikamp if (err) 7263ac27a0ecSDave Kleikamp goto out; 7264bfff6873SLukas Czerner 7265ac27a0ecSDave Kleikamp return 0; 7266ac27a0ecSDave Kleikamp out: 726724b58424STheodore Ts'o unregister_as_ext2(); 726824b58424STheodore Ts'o unregister_as_ext3(); 7269aa75f4d3SHarshad Shirwadkar out05: 7270ac27a0ecSDave Kleikamp destroy_inodecache(); 7271ac27a0ecSDave Kleikamp out1: 72725dabfc78STheodore Ts'o ext4_exit_mballoc(); 72739c191f70ST Makphaibulchoke out2: 7274b5799018STheodore Ts'o ext4_exit_sysfs(); 7275b5799018STheodore Ts'o out3: 7276dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7277b5799018STheodore Ts'o out4: 72785dabfc78STheodore Ts'o ext4_exit_pageio(); 7279b5799018STheodore Ts'o out5: 728022cfe4b4SEric Biggers ext4_exit_post_read_processing(); 72811dc0aa46SEric Whitney out6: 728222cfe4b4SEric Biggers ext4_exit_pending(); 728322cfe4b4SEric Biggers out7: 728451865fdaSZheng Liu ext4_exit_es(); 728551865fdaSZheng Liu 7286ac27a0ecSDave Kleikamp return err; 7287ac27a0ecSDave Kleikamp } 7288ac27a0ecSDave Kleikamp 72895dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7290ac27a0ecSDave Kleikamp { 7291bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 729224b58424STheodore Ts'o unregister_as_ext2(); 729324b58424STheodore Ts'o unregister_as_ext3(); 729403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7295ac27a0ecSDave Kleikamp destroy_inodecache(); 72965dabfc78STheodore Ts'o ext4_exit_mballoc(); 7297b5799018STheodore Ts'o ext4_exit_sysfs(); 72985dabfc78STheodore Ts'o ext4_exit_system_zone(); 72995dabfc78STheodore Ts'o ext4_exit_pageio(); 730022cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7301dd12ed14SEric Sandeen ext4_exit_es(); 73021dc0aa46SEric Whitney ext4_exit_pending(); 7303ac27a0ecSDave Kleikamp } 7304ac27a0ecSDave Kleikamp 7305ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 730683982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7307ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 73087ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 73095dabfc78STheodore Ts'o module_init(ext4_init_fs) 73105dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7311