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); 94*6e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb); 95ac27a0ecSDave Kleikamp 96e74031fdSJan Kara /* 97e74031fdSJan Kara * Lock ordering 98e74031fdSJan Kara * 99e74031fdSJan Kara * page fault path: 100d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 101d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 102e74031fdSJan Kara * 103e74031fdSJan Kara * buffered write path: 104c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 105e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 106e74031fdSJan Kara * i_data_sem (rw) 107e74031fdSJan Kara * 108e74031fdSJan Kara * truncate: 109d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 110d4f5258eSJan Kara * page lock 111d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1121d39834fSNikolay Borisov * i_data_sem (rw) 113e74031fdSJan Kara * 114e74031fdSJan Kara * direct IO: 115c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1161d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 117e74031fdSJan Kara * 118e74031fdSJan Kara * writepages: 119e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 120e74031fdSJan Kara */ 121e74031fdSJan Kara 122c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1232035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1242035e776STheodore Ts'o .owner = THIS_MODULE, 1252035e776STheodore Ts'o .name = "ext2", 1262035e776STheodore Ts'o .mount = ext4_mount, 1272035e776STheodore Ts'o .kill_sb = kill_block_super, 1282035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1292035e776STheodore Ts'o }; 1307f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 131fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1322035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1332035e776STheodore Ts'o #else 1342035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1352035e776STheodore Ts'o #endif 1362035e776STheodore Ts'o 1372035e776STheodore Ts'o 138ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 139ba69f9abSJan Kara .owner = THIS_MODULE, 140ba69f9abSJan Kara .name = "ext3", 141152a0836SAl Viro .mount = ext4_mount, 142ba69f9abSJan Kara .kill_sb = kill_block_super, 143ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 144ba69f9abSJan Kara }; 1457f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 146fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 147ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 148bd81d8eeSLaurent Vivier 149fa491b14Szhangyi (F) 150fa491b14Szhangyi (F) static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags, 151fa491b14Szhangyi (F) bh_end_io_t *end_io) 152fa491b14Szhangyi (F) { 153fb265c9cSTheodore Ts'o /* 154fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 155fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 156fa491b14Szhangyi (F) * recheck the buffer contents. 157fa491b14Szhangyi (F) */ 158fa491b14Szhangyi (F) clear_buffer_verified(bh); 159fa491b14Szhangyi (F) 160fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 161fa491b14Szhangyi (F) get_bh(bh); 162fa491b14Szhangyi (F) submit_bh(REQ_OP_READ, op_flags, bh); 163fa491b14Szhangyi (F) } 164fa491b14Szhangyi (F) 165fa491b14Szhangyi (F) void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 166fa491b14Szhangyi (F) bh_end_io_t *end_io) 167fa491b14Szhangyi (F) { 168fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 169fa491b14Szhangyi (F) 170fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 171fa491b14Szhangyi (F) unlock_buffer(bh); 172fa491b14Szhangyi (F) return; 173fa491b14Szhangyi (F) } 174fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 175fa491b14Szhangyi (F) } 176fa491b14Szhangyi (F) 177fa491b14Szhangyi (F) int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io) 178fa491b14Szhangyi (F) { 179fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 180fa491b14Szhangyi (F) 181fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 182fa491b14Szhangyi (F) unlock_buffer(bh); 183fa491b14Szhangyi (F) return 0; 184fa491b14Szhangyi (F) } 185fa491b14Szhangyi (F) 186fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 187fa491b14Szhangyi (F) 188fa491b14Szhangyi (F) wait_on_buffer(bh); 189fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 190fa491b14Szhangyi (F) return 0; 191fa491b14Szhangyi (F) return -EIO; 192fa491b14Szhangyi (F) } 193fa491b14Szhangyi (F) 194fa491b14Szhangyi (F) int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait) 195fa491b14Szhangyi (F) { 196fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 197fa491b14Szhangyi (F) if (wait) 198fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 199fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 200fa491b14Szhangyi (F) return 0; 201fa491b14Szhangyi (F) } 202fa491b14Szhangyi (F) if (wait) { 203fa491b14Szhangyi (F) wait_on_buffer(bh); 204fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 205fa491b14Szhangyi (F) return 0; 206fa491b14Szhangyi (F) return -EIO; 207fa491b14Szhangyi (F) } 208fa491b14Szhangyi (F) return 0; 209fa491b14Szhangyi (F) } 210fa491b14Szhangyi (F) 211fb265c9cSTheodore Ts'o /* 2128394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 213fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 214fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 215fb265c9cSTheodore Ts'o * return. 216fb265c9cSTheodore Ts'o */ 2178394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 2188394a6abSzhangyi (F) sector_t block, int op_flags, 2198394a6abSzhangyi (F) gfp_t gfp) 220fb265c9cSTheodore Ts'o { 2212d069c08Szhangyi (F) struct buffer_head *bh; 2222d069c08Szhangyi (F) int ret; 223fb265c9cSTheodore Ts'o 2248394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 225fb265c9cSTheodore Ts'o if (bh == NULL) 226fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 227cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 228fb265c9cSTheodore Ts'o return bh; 2292d069c08Szhangyi (F) 2302d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2312d069c08Szhangyi (F) if (ret) { 232fb265c9cSTheodore Ts'o put_bh(bh); 2332d069c08Szhangyi (F) return ERR_PTR(ret); 2342d069c08Szhangyi (F) } 2352d069c08Szhangyi (F) return bh; 236fb265c9cSTheodore Ts'o } 237fb265c9cSTheodore Ts'o 2388394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 2398394a6abSzhangyi (F) int op_flags) 2408394a6abSzhangyi (F) { 2418394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2428394a6abSzhangyi (F) } 2438394a6abSzhangyi (F) 2448394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2458394a6abSzhangyi (F) sector_t block) 2468394a6abSzhangyi (F) { 2478394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2488394a6abSzhangyi (F) } 2498394a6abSzhangyi (F) 2505df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2515df1d412Szhangyi (F) { 2525df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2535df1d412Szhangyi (F) 2545df1d412Szhangyi (F) if (likely(bh)) { 2555df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2565df1d412Szhangyi (F) brelse(bh); 2575df1d412Szhangyi (F) } 258c197855eSStephen Hemminger } 259a9c47317SDarrick J. Wong 260a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2619aa5d32bSDmitry Monakhov struct ext4_super_block *es) 262a9c47317SDarrick J. Wong { 263a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 264a9c47317SDarrick J. Wong return 1; 265a9c47317SDarrick J. Wong 266a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 26706db49e6STheodore Ts'o } 268a9c47317SDarrick J. Wong 26906db49e6STheodore Ts'o static __le32 ext4_superblock_csum(struct super_block *sb, 27006db49e6STheodore Ts'o struct ext4_super_block *es) 2719aa5d32bSDmitry Monakhov { 272a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 273a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 274a9c47317SDarrick J. Wong __u32 csum; 275a9c47317SDarrick J. Wong 276a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 2779933fc0aSTheodore Ts'o 2789933fc0aSTheodore Ts'o return cpu_to_le32(csum); 2799933fc0aSTheodore Ts'o } 2809933fc0aSTheodore Ts'o 2818be04b93SJoe Perches static int ext4_superblock_csum_verify(struct super_block *sb, 2829933fc0aSTheodore Ts'o struct ext4_super_block *es) 2839933fc0aSTheodore Ts'o { 2849933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2859933fc0aSTheodore Ts'o return 1; 2869933fc0aSTheodore Ts'o 2879933fc0aSTheodore Ts'o return es->s_checksum == ext4_superblock_csum(sb, es); 2889933fc0aSTheodore Ts'o } 2899933fc0aSTheodore Ts'o 2909933fc0aSTheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 2918be04b93SJoe Perches { 2929933fc0aSTheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2939933fc0aSTheodore Ts'o 2949933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2959933fc0aSTheodore Ts'o return; 2969933fc0aSTheodore Ts'o 2978fadc143SAlexandre Ratchov es->s_checksum = ext4_superblock_csum(sb, es); 2988fadc143SAlexandre Ratchov } 299bd81d8eeSLaurent Vivier 300bd81d8eeSLaurent Vivier ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 301bd81d8eeSLaurent Vivier struct ext4_group_desc *bg) 302bd81d8eeSLaurent Vivier { 3033a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3048fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3058fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 306bd81d8eeSLaurent Vivier } 307bd81d8eeSLaurent Vivier 3088fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3098fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 310bd81d8eeSLaurent Vivier { 3115272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3128fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3138fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 314bd81d8eeSLaurent Vivier } 315bd81d8eeSLaurent Vivier 3168fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3178fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 318bd81d8eeSLaurent Vivier { 3195272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3208fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3218fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 322bd81d8eeSLaurent Vivier } 323bd81d8eeSLaurent Vivier 324021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 325560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 326560671a0SAneesh Kumar K.V { 327560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 328560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 329560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 330560671a0SAneesh Kumar K.V } 331560671a0SAneesh Kumar K.V 332560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 333560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 334560671a0SAneesh Kumar K.V { 335560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 336560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 337560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 338560671a0SAneesh Kumar K.V } 339560671a0SAneesh Kumar K.V 340560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 341560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 342560671a0SAneesh Kumar K.V { 343560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 344560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 345560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 346560671a0SAneesh Kumar K.V } 347560671a0SAneesh Kumar K.V 348560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 349560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 350560671a0SAneesh Kumar K.V { 351560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 352560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 353560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 354560671a0SAneesh Kumar K.V } 355560671a0SAneesh Kumar K.V 3568fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3578fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 358bd81d8eeSLaurent Vivier { 3593a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3608fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3618fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 362bd81d8eeSLaurent Vivier } 363bd81d8eeSLaurent Vivier 3648fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3658fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 366bd81d8eeSLaurent Vivier { 3675272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3688fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3698fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 370bd81d8eeSLaurent Vivier } 371bd81d8eeSLaurent Vivier 3728fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3738fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 374bd81d8eeSLaurent Vivier { 3755272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3768fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3778fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 378bd81d8eeSLaurent Vivier } 379bd81d8eeSLaurent Vivier 380021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 381560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 382560671a0SAneesh Kumar K.V { 383560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 384560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 385560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 386560671a0SAneesh Kumar K.V } 387560671a0SAneesh Kumar K.V 388560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 389560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 390560671a0SAneesh Kumar K.V { 391560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 392560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 393560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 394560671a0SAneesh Kumar K.V } 395560671a0SAneesh Kumar K.V 396560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 397560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 398560671a0SAneesh Kumar K.V { 399560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 400560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 401560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 402560671a0SAneesh Kumar K.V } 403560671a0SAneesh Kumar K.V 404560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 405560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 406560671a0SAneesh Kumar K.V { 407560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 408560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 409560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 410560671a0SAneesh Kumar K.V } 411560671a0SAneesh Kumar K.V 412c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4136a0678a7SArnd Bergmann { 4146a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4156a0678a7SArnd Bergmann 4166a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4176a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4186a0678a7SArnd Bergmann } 4196a0678a7SArnd Bergmann 4206a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4216a0678a7SArnd Bergmann { 4226a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4236a0678a7SArnd Bergmann } 4246a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 425c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 426c92dc856SJan Kara ktime_get_real_seconds()) 4276a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4286a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 429d3d1faf6SCurt Wohlgemuth 430bdfe0cbdSTheodore Ts'o /* 431bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 432bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 433bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 434bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 435bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 436bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 437bdfe0cbdSTheodore Ts'o */ 438bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 439bdfe0cbdSTheodore Ts'o { 440bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 441bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 442bdfe0cbdSTheodore Ts'o 443bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 444bdfe0cbdSTheodore Ts'o } 445bdfe0cbdSTheodore Ts'o 44618aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 44718aadd47SBobi Jam { 44818aadd47SBobi Jam struct super_block *sb = journal->j_private; 44918aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 45018aadd47SBobi Jam int error = is_journal_aborted(journal); 4515d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 45218aadd47SBobi Jam 4535d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 454a0154344SDaeho Jeong 455a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 456a0154344SDaeho Jeong 45718aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4585d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4595d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4605d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 46118aadd47SBobi Jam list_del_init(&jce->jce_list); 46218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46318aadd47SBobi Jam jce->jce_func(sb, jce, error); 46418aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 46518aadd47SBobi Jam } 46618aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46718aadd47SBobi Jam } 4681c13d5c0STheodore Ts'o 469afb585a9SMauricio Faria de Oliveira /* 470afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 471afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 472afb585a9SMauricio Faria de Oliveira * 473afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 474afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 475afb585a9SMauricio Faria de Oliveira * to write protect the pages. 476afb585a9SMauricio Faria de Oliveira * 477afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 478afb585a9SMauricio Faria de Oliveira */ 479afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 480afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 481afb585a9SMauricio Faria de Oliveira void *data) 482afb585a9SMauricio Faria de Oliveira { 483afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 484afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 485afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 486afb585a9SMauricio Faria de Oliveira 487afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 488afb585a9SMauricio Faria de Oliveira do { 489afb585a9SMauricio Faria de Oliveira /* 490afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 491afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 492afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 493afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 494afb585a9SMauricio Faria de Oliveira * properly. 495afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 496afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 497afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 498afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 499afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 500afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 501afb585a9SMauricio Faria de Oliveira */ 502afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 503afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 504afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 505afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 506afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 507afb585a9SMauricio Faria de Oliveira goto out; 508afb585a9SMauricio Faria de Oliveira } 509afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 510afb585a9SMauricio Faria de Oliveira 511afb585a9SMauricio Faria de Oliveira out: 512afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 513afb585a9SMauricio Faria de Oliveira } 514afb585a9SMauricio Faria de Oliveira 515afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 516afb585a9SMauricio Faria de Oliveira { 517afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 518afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 519afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 520afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 521afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 522afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 523afb585a9SMauricio Faria de Oliveira }; 524afb585a9SMauricio Faria de Oliveira 525afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 526afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 527afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 528afb585a9SMauricio Faria de Oliveira } 529afb585a9SMauricio Faria de Oliveira 530afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 531afb585a9SMauricio Faria de Oliveira { 532afb585a9SMauricio Faria de Oliveira int ret; 533afb585a9SMauricio Faria de Oliveira 534afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 535afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 536afb585a9SMauricio Faria de Oliveira else 537afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 538afb585a9SMauricio Faria de Oliveira 539afb585a9SMauricio Faria de Oliveira return ret; 540afb585a9SMauricio Faria de Oliveira } 541afb585a9SMauricio Faria de Oliveira 542afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 543afb585a9SMauricio Faria de Oliveira { 544afb585a9SMauricio Faria de Oliveira int ret = 0; 545afb585a9SMauricio Faria de Oliveira 546afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 547afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 548afb585a9SMauricio Faria de Oliveira 549afb585a9SMauricio Faria de Oliveira return ret; 550afb585a9SMauricio Faria de Oliveira } 551afb585a9SMauricio Faria de Oliveira 5521dc1097fSJan Kara static bool system_going_down(void) 5531dc1097fSJan Kara { 5541dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5551dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5561dc1097fSJan Kara } 5571dc1097fSJan Kara 55802a7780eSJan Kara struct ext4_err_translation { 55902a7780eSJan Kara int code; 56002a7780eSJan Kara int errno; 56102a7780eSJan Kara }; 56202a7780eSJan Kara 56302a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 56402a7780eSJan Kara 56502a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 56602a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 56702a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 56802a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 56902a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 57002a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 57102a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 57202a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 57302a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 57402a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 57502a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 57602a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 57702a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 58202a7780eSJan Kara }; 58302a7780eSJan Kara 58402a7780eSJan Kara static int ext4_errno_to_code(int errno) 58502a7780eSJan Kara { 58602a7780eSJan Kara int i; 58702a7780eSJan Kara 58802a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 58902a7780eSJan Kara if (err_translation[i].errno == errno) 59002a7780eSJan Kara return err_translation[i].code; 59102a7780eSJan Kara return EXT4_ERR_UNKNOWN; 59202a7780eSJan Kara } 59302a7780eSJan Kara 5942d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 59540676623SJan Kara __u32 ino, __u64 block, 59640676623SJan Kara const char *func, unsigned int line) 59740676623SJan Kara { 598c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 59940676623SJan Kara 60002a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 60102a7780eSJan Kara if (error == 0) 60202a7780eSJan Kara error = EFSCORRUPTED; 603c92dc856SJan Kara 604c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 605c92dc856SJan Kara sbi->s_add_error_count++; 606c92dc856SJan Kara sbi->s_last_error_code = error; 607c92dc856SJan Kara sbi->s_last_error_line = line; 608c92dc856SJan Kara sbi->s_last_error_ino = ino; 609c92dc856SJan Kara sbi->s_last_error_block = block; 610c92dc856SJan Kara sbi->s_last_error_func = func; 611c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 612c92dc856SJan Kara if (!sbi->s_first_error_time) { 613c92dc856SJan Kara sbi->s_first_error_code = error; 614c92dc856SJan Kara sbi->s_first_error_line = line; 615c92dc856SJan Kara sbi->s_first_error_ino = ino; 616c92dc856SJan Kara sbi->s_first_error_block = block; 617c92dc856SJan Kara sbi->s_first_error_func = func; 618c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 61940676623SJan Kara } 620c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 62140676623SJan Kara } 62240676623SJan Kara 623ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 624ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 625ac27a0ecSDave Kleikamp * 626ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 627617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 628ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 629ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 630ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 631ac27a0ecSDave Kleikamp * write out the superblock safely. 632ac27a0ecSDave Kleikamp * 633dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 634d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 635ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 636014c9caaSJan Kara * 637014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 638014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 639014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 640014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 641014c9caaSJan Kara * at a critical moment in log management. 642ac27a0ecSDave Kleikamp */ 643e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 644e789ca0cSJan Kara __u32 ino, __u64 block, 645e789ca0cSJan Kara const char *func, unsigned int line) 646ac27a0ecSDave Kleikamp { 647b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6482d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 649b08070ecSJan Kara 650e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 651327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 652327eaf73STheodore Ts'o WARN_ON_ONCE(1); 653327eaf73STheodore Ts'o 6542d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6559b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 656ac27a0ecSDave Kleikamp if (journal) 657dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6582d01ddc8SJan Kara } 6592d01ddc8SJan Kara 6602d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6612d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6622d01ddc8SJan Kara /* 6632d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6642d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6652d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6662d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6672d01ddc8SJan Kara */ 668bb9464e0Syangerkun if (continue_fs && journal) 6692d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6702d01ddc8SJan Kara else 6712d01ddc8SJan Kara ext4_commit_super(sb); 6722d01ddc8SJan Kara } 6732d01ddc8SJan Kara 6741dc1097fSJan Kara /* 6751dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6761dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6771dc1097fSJan Kara * disabled. 6781dc1097fSJan Kara */ 679014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 680617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 681ac27a0ecSDave Kleikamp sb->s_id); 682ac27a0ecSDave Kleikamp } 683ac2f7ca5SYe Bin 684ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 685ac2f7ca5SYe Bin return; 686ac2f7ca5SYe Bin 687014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 688014c9caaSJan Kara /* 689014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 690014c9caaSJan Kara * ->s_flags update 691014c9caaSJan Kara */ 692014c9caaSJan Kara smp_wmb(); 693014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 6944327ba52SDaeho Jeong } 695ac27a0ecSDave Kleikamp 696c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 697c92dc856SJan Kara { 698c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 699c92dc856SJan Kara s_error_work); 7002d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7012d01ddc8SJan Kara handle_t *handle; 702c92dc856SJan Kara 7032d01ddc8SJan Kara /* 7042d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7052d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7062d01ddc8SJan Kara * updates. 7072d01ddc8SJan Kara * 7082d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7092d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7102d01ddc8SJan Kara */ 7112d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 712558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7132d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7142d01ddc8SJan Kara if (IS_ERR(handle)) 7152d01ddc8SJan Kara goto write_directly; 716558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7172d01ddc8SJan Kara jbd2_journal_stop(handle); 7182d01ddc8SJan Kara goto write_directly; 7192d01ddc8SJan Kara } 7202d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 721558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 722558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 723558d6450SYe Bin "superblock detected"); 724558d6450SYe Bin clear_buffer_write_io_error(sbh); 725558d6450SYe Bin set_buffer_uptodate(sbh); 726558d6450SYe Bin } 727558d6450SYe Bin 728558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7292d01ddc8SJan Kara jbd2_journal_stop(handle); 7302d01ddc8SJan Kara goto write_directly; 7312d01ddc8SJan Kara } 7322d01ddc8SJan Kara jbd2_journal_stop(handle); 733d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7342d01ddc8SJan Kara return; 7352d01ddc8SJan Kara } 7362d01ddc8SJan Kara write_directly: 7372d01ddc8SJan Kara /* 7382d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7392d01ddc8SJan Kara * out and hope for the best. 7402d01ddc8SJan Kara */ 7414392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 742d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 743ac27a0ecSDave Kleikamp } 744ac27a0ecSDave Kleikamp 745efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 746efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 747efbed4dcSTheodore Ts'o "EXT4-fs error") 748efbed4dcSTheodore Ts'o 74912062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 750014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 75154d3adbcSTheodore Ts'o const char *fmt, ...) 752ac27a0ecSDave Kleikamp { 7530ff2ea7dSJoe Perches struct va_format vaf; 754ac27a0ecSDave Kleikamp va_list args; 755ac27a0ecSDave Kleikamp 7560db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7570db1ff22STheodore Ts'o return; 7580db1ff22STheodore Ts'o 759ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 760efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 761ac27a0ecSDave Kleikamp va_start(args, fmt); 7620ff2ea7dSJoe Perches vaf.fmt = fmt; 7630ff2ea7dSJoe Perches vaf.va = &args; 764efbed4dcSTheodore Ts'o printk(KERN_CRIT 765efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7660ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 767ac27a0ecSDave Kleikamp va_end(args); 768efbed4dcSTheodore Ts'o } 7699a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7709a089b21SGabriel Krisman Bertazi 771e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 772ac27a0ecSDave Kleikamp } 773ac27a0ecSDave Kleikamp 774e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 77554d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 776273df556SFrank Mayhar const char *fmt, ...) 777273df556SFrank Mayhar { 778273df556SFrank Mayhar va_list args; 779f7c21177STheodore Ts'o struct va_format vaf; 780273df556SFrank Mayhar 7810db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7820db1ff22STheodore Ts'o return; 7830db1ff22STheodore Ts'o 784ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 785efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 786273df556SFrank Mayhar va_start(args, fmt); 787f7c21177STheodore Ts'o vaf.fmt = fmt; 788f7c21177STheodore Ts'o vaf.va = &args; 789c398eda0STheodore Ts'o if (block) 790d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 791d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 792d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 793d9ee81daSJoe Perches block, current->comm, &vaf); 794d9ee81daSJoe Perches else 795d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 796d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 797d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 798d9ee81daSJoe Perches current->comm, &vaf); 799273df556SFrank Mayhar va_end(args); 800efbed4dcSTheodore Ts'o } 8019a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8029a089b21SGabriel Krisman Bertazi 803e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 80454d3adbcSTheodore Ts'o function, line); 805273df556SFrank Mayhar } 806273df556SFrank Mayhar 807e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 808f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 809f7c21177STheodore Ts'o const char *fmt, ...) 810273df556SFrank Mayhar { 811273df556SFrank Mayhar va_list args; 812f7c21177STheodore Ts'o struct va_format vaf; 813496ad9aaSAl Viro struct inode *inode = file_inode(file); 814273df556SFrank Mayhar char pathname[80], *path; 815273df556SFrank Mayhar 8160db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8170db1ff22STheodore Ts'o return; 8180db1ff22STheodore Ts'o 819ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 820efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8219bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 822f9a62d09SDan Carpenter if (IS_ERR(path)) 823273df556SFrank Mayhar path = "(unknown)"; 824f7c21177STheodore Ts'o va_start(args, fmt); 825f7c21177STheodore Ts'o vaf.fmt = fmt; 826f7c21177STheodore Ts'o vaf.va = &args; 827d9ee81daSJoe Perches if (block) 828d9ee81daSJoe Perches printk(KERN_CRIT 829d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 830d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 831d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 832d9ee81daSJoe Perches block, current->comm, path, &vaf); 833d9ee81daSJoe Perches else 834d9ee81daSJoe Perches printk(KERN_CRIT 835d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 836d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 837d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 838d9ee81daSJoe Perches current->comm, path, &vaf); 839273df556SFrank Mayhar va_end(args); 840efbed4dcSTheodore Ts'o } 8419a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8429a089b21SGabriel Krisman Bertazi 843e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 84454d3adbcSTheodore Ts'o function, line); 845273df556SFrank Mayhar } 846273df556SFrank Mayhar 847722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 848ac27a0ecSDave Kleikamp char nbuf[16]) 849ac27a0ecSDave Kleikamp { 850ac27a0ecSDave Kleikamp char *errstr = NULL; 851ac27a0ecSDave Kleikamp 852ac27a0ecSDave Kleikamp switch (errno) { 8536a797d27SDarrick J. Wong case -EFSCORRUPTED: 8546a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8556a797d27SDarrick J. Wong break; 8566a797d27SDarrick J. Wong case -EFSBADCRC: 8576a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8586a797d27SDarrick J. Wong break; 859ac27a0ecSDave Kleikamp case -EIO: 860ac27a0ecSDave Kleikamp errstr = "IO failure"; 861ac27a0ecSDave Kleikamp break; 862ac27a0ecSDave Kleikamp case -ENOMEM: 863ac27a0ecSDave Kleikamp errstr = "Out of memory"; 864ac27a0ecSDave Kleikamp break; 865ac27a0ecSDave Kleikamp case -EROFS: 86678f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 86778f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 868ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 869ac27a0ecSDave Kleikamp else 870ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 871ac27a0ecSDave Kleikamp break; 872ac27a0ecSDave Kleikamp default: 873ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 874ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 875ac27a0ecSDave Kleikamp * NULL. */ 876ac27a0ecSDave Kleikamp if (nbuf) { 877ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 878ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 879ac27a0ecSDave Kleikamp errstr = nbuf; 880ac27a0ecSDave Kleikamp } 881ac27a0ecSDave Kleikamp break; 882ac27a0ecSDave Kleikamp } 883ac27a0ecSDave Kleikamp 884ac27a0ecSDave Kleikamp return errstr; 885ac27a0ecSDave Kleikamp } 886ac27a0ecSDave Kleikamp 887617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 888ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 889ac27a0ecSDave Kleikamp 890c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 891c398eda0STheodore Ts'o unsigned int line, int errno) 892ac27a0ecSDave Kleikamp { 893ac27a0ecSDave Kleikamp char nbuf[16]; 894ac27a0ecSDave Kleikamp const char *errstr; 895ac27a0ecSDave Kleikamp 8960db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 8970db1ff22STheodore Ts'o return; 8980db1ff22STheodore Ts'o 899ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 900ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 901ac27a0ecSDave Kleikamp * an error. */ 902bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 903ac27a0ecSDave Kleikamp return; 904ac27a0ecSDave Kleikamp 905efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 906617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 907c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 908c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 909efbed4dcSTheodore Ts'o } 9109a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 911ac27a0ecSDave Kleikamp 912e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 913ac27a0ecSDave Kleikamp } 914ac27a0ecSDave Kleikamp 915e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 916e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 917b31e1552SEric Sandeen { 9180ff2ea7dSJoe Perches struct va_format vaf; 919b31e1552SEric Sandeen va_list args; 920b31e1552SEric Sandeen 921da812f61SLukas Czerner if (sb) { 9221cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 923da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 924da812f61SLukas Czerner "EXT4-fs")) 925efbed4dcSTheodore Ts'o return; 926da812f61SLukas Czerner } 927efbed4dcSTheodore Ts'o 928b31e1552SEric Sandeen va_start(args, fmt); 9290ff2ea7dSJoe Perches vaf.fmt = fmt; 9300ff2ea7dSJoe Perches vaf.va = &args; 931da812f61SLukas Czerner if (sb) 9320ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 933da812f61SLukas Czerner else 934da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 935b31e1552SEric Sandeen va_end(args); 936b31e1552SEric Sandeen } 937b31e1552SEric Sandeen 9381cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9391cf006edSDmitry Monakhov { 9401cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9411cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9421cf006edSDmitry Monakhov "EXT4-fs warning"); 9431cf006edSDmitry Monakhov } 944b03a2f7eSAndreas Dilger 94512062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 946c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 947ac27a0ecSDave Kleikamp { 9480ff2ea7dSJoe Perches struct va_format vaf; 949ac27a0ecSDave Kleikamp va_list args; 950ac27a0ecSDave Kleikamp 951b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 952efbed4dcSTheodore Ts'o return; 953efbed4dcSTheodore Ts'o 954ac27a0ecSDave Kleikamp va_start(args, fmt); 9550ff2ea7dSJoe Perches vaf.fmt = fmt; 9560ff2ea7dSJoe Perches vaf.va = &args; 9570ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9580ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 959ac27a0ecSDave Kleikamp va_end(args); 960ac27a0ecSDave Kleikamp } 961ac27a0ecSDave Kleikamp 962b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 963b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 964b03a2f7eSAndreas Dilger { 965b03a2f7eSAndreas Dilger struct va_format vaf; 966b03a2f7eSAndreas Dilger va_list args; 967b03a2f7eSAndreas Dilger 968b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 969b03a2f7eSAndreas Dilger return; 970b03a2f7eSAndreas Dilger 971b03a2f7eSAndreas Dilger va_start(args, fmt); 972b03a2f7eSAndreas Dilger vaf.fmt = fmt; 973b03a2f7eSAndreas Dilger vaf.va = &args; 974b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 975b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 976b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 977b03a2f7eSAndreas Dilger va_end(args); 978b03a2f7eSAndreas Dilger } 979b03a2f7eSAndreas Dilger 980e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 981e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 982e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 983e29136f8STheodore Ts'o const char *fmt, ...) 9845d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9855d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9865d1b1b3fSAneesh Kumar K.V { 9870ff2ea7dSJoe Perches struct va_format vaf; 9885d1b1b3fSAneesh Kumar K.V va_list args; 9895d1b1b3fSAneesh Kumar K.V 9900db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9910db1ff22STheodore Ts'o return; 9920db1ff22STheodore Ts'o 993ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 994efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 9955d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 9960ff2ea7dSJoe Perches vaf.fmt = fmt; 9970ff2ea7dSJoe Perches vaf.va = &args; 99821149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 999e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1000e29136f8STheodore Ts'o if (ino) 10010ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1002e29136f8STheodore Ts'o if (block) 1003efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1004efbed4dcSTheodore Ts'o (unsigned long long) block); 10050ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10065d1b1b3fSAneesh Kumar K.V va_end(args); 1007efbed4dcSTheodore Ts'o } 10085d1b1b3fSAneesh Kumar K.V 1009c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1010327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1011327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1012e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10132d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10142d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10152d01ddc8SJan Kara line); 1016c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10172d01ddc8SJan Kara } 10185d1b1b3fSAneesh Kumar K.V return; 10195d1b1b3fSAneesh Kumar K.V } 10205d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1021e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10225d1b1b3fSAneesh Kumar K.V /* 10235d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10245d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10255d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10265d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10275d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 102825985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10295d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10305d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10315d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10325d1b1b3fSAneesh Kumar K.V */ 10335d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10345d1b1b3fSAneesh Kumar K.V return; 10355d1b1b3fSAneesh Kumar K.V } 10365d1b1b3fSAneesh Kumar K.V 1037db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1038db79e6d1SWang Shilong ext4_group_t group, 1039db79e6d1SWang Shilong unsigned int flags) 1040db79e6d1SWang Shilong { 1041db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1042db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1043db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10449af0b3d1SWang Shilong int ret; 1045db79e6d1SWang Shilong 10469af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10479af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10489af0b3d1SWang Shilong &grp->bb_state); 10499af0b3d1SWang Shilong if (!ret) 1050db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1051db79e6d1SWang Shilong grp->bb_free); 1052db79e6d1SWang Shilong } 1053db79e6d1SWang Shilong 10549af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10559af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10569af0b3d1SWang Shilong &grp->bb_state); 10579af0b3d1SWang Shilong if (!ret && gdp) { 1058db79e6d1SWang Shilong int count; 1059db79e6d1SWang Shilong 1060db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1061db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1062db79e6d1SWang Shilong count); 1063db79e6d1SWang Shilong } 1064db79e6d1SWang Shilong } 1065db79e6d1SWang Shilong } 1066db79e6d1SWang Shilong 1067617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1068ac27a0ecSDave Kleikamp { 1069617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1070ac27a0ecSDave Kleikamp 1071617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1072ac27a0ecSDave Kleikamp return; 1073ac27a0ecSDave Kleikamp 107412062dddSEric Sandeen ext4_warning(sb, 1075ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1076ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1077617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1078ac27a0ecSDave Kleikamp 1079617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1080617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1081617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1082ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1083ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1084ac27a0ecSDave Kleikamp 1085ac27a0ecSDave Kleikamp /* 1086ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1087ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1088ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1089ac27a0ecSDave Kleikamp */ 1090ac27a0ecSDave Kleikamp } 1091ac27a0ecSDave Kleikamp 1092ac27a0ecSDave Kleikamp /* 1093ac27a0ecSDave Kleikamp * Open the external journal device 1094ac27a0ecSDave Kleikamp */ 1095b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1096ac27a0ecSDave Kleikamp { 1097ac27a0ecSDave Kleikamp struct block_device *bdev; 1098ac27a0ecSDave Kleikamp 1099d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1100ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1101ac27a0ecSDave Kleikamp goto fail; 1102ac27a0ecSDave Kleikamp return bdev; 1103ac27a0ecSDave Kleikamp 1104ac27a0ecSDave Kleikamp fail: 1105ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1106ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1107ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1108ac27a0ecSDave Kleikamp return NULL; 1109ac27a0ecSDave Kleikamp } 1110ac27a0ecSDave Kleikamp 1111ac27a0ecSDave Kleikamp /* 1112ac27a0ecSDave Kleikamp * Release the journal device 1113ac27a0ecSDave Kleikamp */ 11144385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1115ac27a0ecSDave Kleikamp { 11164385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1117ac27a0ecSDave Kleikamp } 1118ac27a0ecSDave Kleikamp 11194385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1120ac27a0ecSDave Kleikamp { 1121ac27a0ecSDave Kleikamp struct block_device *bdev; 1122ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1123ac27a0ecSDave Kleikamp if (bdev) { 11244385bab1SAl Viro ext4_blkdev_put(bdev); 1125ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1126ac27a0ecSDave Kleikamp } 1127ac27a0ecSDave Kleikamp } 1128ac27a0ecSDave Kleikamp 1129ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1130ac27a0ecSDave Kleikamp { 1131617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1132ac27a0ecSDave Kleikamp } 1133ac27a0ecSDave Kleikamp 1134617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1135ac27a0ecSDave Kleikamp { 1136ac27a0ecSDave Kleikamp struct list_head *l; 1137ac27a0ecSDave Kleikamp 1138b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1139ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1140ac27a0ecSDave Kleikamp 1141ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1142ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1143ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1144ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1145ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1146ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1147ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1148ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1149ac27a0ecSDave Kleikamp } 1150ac27a0ecSDave Kleikamp } 1151ac27a0ecSDave Kleikamp 1152957153fcSJan Kara #ifdef CONFIG_QUOTA 1153957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1154957153fcSJan Kara 1155957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1156957153fcSJan Kara { 1157957153fcSJan Kara int type; 1158957153fcSJan Kara 1159957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1160957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1161957153fcSJan Kara ext4_quota_off(sb, type); 1162957153fcSJan Kara } 116333458eabSTheodore Ts'o 116433458eabSTheodore Ts'o /* 116533458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 116633458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 116733458eabSTheodore Ts'o */ 116833458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 116933458eabSTheodore Ts'o struct ext4_sb_info *sbi, 117033458eabSTheodore Ts'o int type) 117133458eabSTheodore Ts'o { 117233458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 117333458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 117433458eabSTheodore Ts'o } 1175957153fcSJan Kara #else 1176957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1177957153fcSJan Kara { 1178957153fcSJan Kara } 1179957153fcSJan Kara #endif 1180957153fcSJan Kara 1181617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1182ac27a0ecSDave Kleikamp { 1183617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1184617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11851d0c3924STheodore Ts'o struct buffer_head **group_desc; 11867c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 118797abd7d4STheodore Ts'o int aborted = 0; 1188ef2cabf7SHidehiro Kawai int i, err; 1189ac27a0ecSDave Kleikamp 1190857ac889SLukas Czerner ext4_unregister_li_request(sb); 1191957153fcSJan Kara ext4_quota_off_umount(sb); 1192e0ccfd95SChristoph Hellwig 1193c92dc856SJan Kara flush_work(&sbi->s_error_work); 11942e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 119502f310fcSJan Kara ext4_release_orphan_info(sb); 11964c0425ffSMingming Cao 11975e47868fSRitesh Harjani /* 11985e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 11995e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 12005e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 12015e47868fSRitesh Harjani */ 12025e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 12035e47868fSRitesh Harjani 12040390131bSFrank Mayhar if (sbi->s_journal) { 120597abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1206ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 120747b4a50bSJan Kara sbi->s_journal = NULL; 1208878520acSTheodore Ts'o if ((err < 0) && !aborted) { 120954d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12100390131bSFrank Mayhar } 1211878520acSTheodore Ts'o } 1212d4edac31SJosef Bacik 1213d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12149105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1215d4edac31SJosef Bacik ext4_release_system_zone(sb); 1216d4edac31SJosef Bacik ext4_mb_release(sb); 1217d4edac31SJosef Bacik ext4_ext_release(sb); 1218d4edac31SJosef Bacik 1219bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1220e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 122102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1222ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1223ac27a0ecSDave Kleikamp } 1224bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12254392fbc4SJan Kara ext4_commit_super(sb); 1226a8e25a83SArtem Bityutskiy 12271d0c3924STheodore Ts'o rcu_read_lock(); 12281d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1229ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12301d0c3924STheodore Ts'o brelse(group_desc[i]); 12311d0c3924STheodore Ts'o kvfree(group_desc); 12327c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12337c990728SSuraj Jitindar Singh if (flex_groups) { 12347c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12357c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12367c990728SSuraj Jitindar Singh kvfree(flex_groups); 12377c990728SSuraj Jitindar Singh } 12381d0c3924STheodore Ts'o rcu_read_unlock(); 123957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1240ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1241ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 124257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1243efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1244bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1245ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1246a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 124733458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1248ac27a0ecSDave Kleikamp #endif 1249ac27a0ecSDave Kleikamp 1250ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1251ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1252ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1253ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1254ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1255ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1256837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1257ac27a0ecSDave Kleikamp 125889d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1259f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1260ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1261ac27a0ecSDave Kleikamp /* 1262ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1263ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1264ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1265ac27a0ecSDave Kleikamp */ 1266ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1267ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1268617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1269ac27a0ecSDave Kleikamp } 127050c15df6SChengguang Xu 1271dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1272dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 127350c15df6SChengguang Xu 127447387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 127547387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 127650c15df6SChengguang Xu 1277618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1278618f0031SPavel Skripkin 12799060dd2cSEric Sandeen brelse(sbi->s_sbh); 1280ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12813197ebdbSTheodore Ts'o /* 12823197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12833197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12843197ebdbSTheodore Ts'o */ 12853197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12863197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 12870441984aSDarrick J. Wong if (sbi->s_chksum_driver) 12880441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1289705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 12905e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1291ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 1292c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1293f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1294c83ad55eSGabriel Krisman Bertazi #endif 1295ac27a0ecSDave Kleikamp kfree(sbi); 1296ac27a0ecSDave Kleikamp } 1297ac27a0ecSDave Kleikamp 1298e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1299ac27a0ecSDave Kleikamp 1300ac27a0ecSDave Kleikamp /* 1301ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1302ac27a0ecSDave Kleikamp */ 1303617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1304ac27a0ecSDave Kleikamp { 1305617ba13bSMingming Cao struct ext4_inode_info *ei; 1306ac27a0ecSDave Kleikamp 1307e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1308ac27a0ecSDave Kleikamp if (!ei) 1309ac27a0ecSDave Kleikamp return NULL; 13100b8e58a1SAndreas Dilger 1311ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1312202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1313c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 131427bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1315c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13169a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13179a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1318edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1319eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1320edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1321dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1322d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1323d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13241dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1325a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1326a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 132796c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1328a9e7f447SDmitry Monakhov #endif 13298aefcd55STheodore Ts'o ei->jinode = NULL; 13302e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1331744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1332b436b9beSJan Kara ei->i_sync_tid = 0; 1333b436b9beSJan Kara ei->i_datasync_tid = 0; 1334e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13352e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1336aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1337aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1338ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1339ac27a0ecSDave Kleikamp } 1340ac27a0ecSDave Kleikamp 13417ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13427ff9c073STheodore Ts'o { 13437ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13447ff9c073STheodore Ts'o 134529b3692eSEric Biggers if (!drop) 134629b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 134729b3692eSEric Biggers 13487ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13497ff9c073STheodore Ts'o return drop; 13507ff9c073STheodore Ts'o } 13517ff9c073STheodore Ts'o 135294053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1353fa0d7e3dSNick Piggin { 13542c58d548SEric Biggers fscrypt_free_inode(inode); 1355aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1356aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1357aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1358aa75f4d3SHarshad Shirwadkar } 1359fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1360fa0d7e3dSNick Piggin } 1361fa0d7e3dSNick Piggin 1362617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1363ac27a0ecSDave Kleikamp { 13649f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1365b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1366b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1367b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13689f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13699f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13709f7dd93dSVasily Averin true); 13719f7dd93dSVasily Averin dump_stack(); 13729f7dd93dSVasily Averin } 13736fed8395SJeffle Xu 13746fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13756fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13766fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13776fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13786fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1379ac27a0ecSDave Kleikamp } 1380ac27a0ecSDave Kleikamp 138151cc5068SAlexey Dobriyan static void init_once(void *foo) 1382ac27a0ecSDave Kleikamp { 1383617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1384ac27a0ecSDave Kleikamp 1385ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1386ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 13870e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1388ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1389aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1390ac27a0ecSDave Kleikamp } 1391ac27a0ecSDave Kleikamp 1392e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1393ac27a0ecSDave Kleikamp { 1394f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1395f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1396f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1397f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1398f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1399f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 140020c2df83SPaul Mundt init_once); 1401617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1402ac27a0ecSDave Kleikamp return -ENOMEM; 1403ac27a0ecSDave Kleikamp return 0; 1404ac27a0ecSDave Kleikamp } 1405ac27a0ecSDave Kleikamp 1406ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1407ac27a0ecSDave Kleikamp { 14088c0a8537SKirill A. Shutemov /* 14098c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14108c0a8537SKirill A. Shutemov * destroy cache. 14118c0a8537SKirill A. Shutemov */ 14128c0a8537SKirill A. Shutemov rcu_barrier(); 1413617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1414ac27a0ecSDave Kleikamp } 1415ac27a0ecSDave Kleikamp 14160930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1417ac27a0ecSDave Kleikamp { 1418aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14190930fcc1SAl Viro invalidate_inode_buffers(inode); 1420dbd5768fSJan Kara clear_inode(inode); 142127bc446eSbrookxu ext4_discard_preallocations(inode, 0); 142251865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1423f4c2d372SJan Kara dquot_drop(inode); 14248aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14258aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14268aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14278aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14288aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14298aefcd55STheodore Ts'o } 14303d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1431c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1432ac27a0ecSDave Kleikamp } 1433ac27a0ecSDave Kleikamp 14341b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14351b961ac0SChristoph Hellwig u64 ino, u32 generation) 1436ac27a0ecSDave Kleikamp { 1437ac27a0ecSDave Kleikamp struct inode *inode; 1438ac27a0ecSDave Kleikamp 14398a363970STheodore Ts'o /* 1440ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1441ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1442ac27a0ecSDave Kleikamp */ 14438a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14441d1fe1eeSDavid Howells if (IS_ERR(inode)) 14451d1fe1eeSDavid Howells return ERR_CAST(inode); 14461d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1447ac27a0ecSDave Kleikamp iput(inode); 1448ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1449ac27a0ecSDave Kleikamp } 14501b961ac0SChristoph Hellwig 14511b961ac0SChristoph Hellwig return inode; 1452ac27a0ecSDave Kleikamp } 14531b961ac0SChristoph Hellwig 14541b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14551b961ac0SChristoph Hellwig int fh_len, int fh_type) 14561b961ac0SChristoph Hellwig { 14571b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14581b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14591b961ac0SChristoph Hellwig } 14601b961ac0SChristoph Hellwig 14611b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14621b961ac0SChristoph Hellwig int fh_len, int fh_type) 14631b961ac0SChristoph Hellwig { 14641b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14651b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1466ac27a0ecSDave Kleikamp } 1467ac27a0ecSDave Kleikamp 1468fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1469fde87268STheodore Ts'o { 1470fde87268STheodore Ts'o struct writeback_control wbc = { 1471fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1472fde87268STheodore Ts'o }; 1473fde87268STheodore Ts'o 1474fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1475fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1476fde87268STheodore Ts'o } 1477fde87268STheodore Ts'o 1478643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1479a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1480a7550b30SJaegeuk Kim { 1481a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1482a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1483a7550b30SJaegeuk Kim } 1484a7550b30SJaegeuk Kim 1485a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1486a7550b30SJaegeuk Kim void *fs_data) 1487a7550b30SJaegeuk Kim { 14882f8f5e76SEric Biggers handle_t *handle = fs_data; 1489c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1490a7550b30SJaegeuk Kim 14919ce0151aSEric Biggers /* 14929ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 14939ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 14949ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 14959ce0151aSEric Biggers * the filename "lost+found" itself. 14969ce0151aSEric Biggers */ 14979ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 14989ce0151aSEric Biggers return -EPERM; 1499a7550b30SJaegeuk Kim 15007d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 15017d3e06a8SRoss Zwisler return -EINVAL; 15027d3e06a8SRoss Zwisler 1503b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1504b383a73fSIra Weiny return -EOPNOTSUPP; 1505b383a73fSIra Weiny 150694840e3cSEric Biggers res = ext4_convert_inline_data(inode); 150794840e3cSEric Biggers if (res) 150894840e3cSEric Biggers return res; 150994840e3cSEric Biggers 15102f8f5e76SEric Biggers /* 15112f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 15122f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 15132f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15142f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15152f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15162f8f5e76SEric Biggers */ 15172f8f5e76SEric Biggers 15182f8f5e76SEric Biggers if (handle) { 15192f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15202f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15212f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15222f8f5e76SEric Biggers ctx, len, 0); 1523a7550b30SJaegeuk Kim if (!res) { 1524a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1525a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1526a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1527a3caa24bSJan Kara /* 15282ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15292ee6a576SEric Biggers * S_DAX may be disabled 1530a3caa24bSJan Kara */ 1531043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1532a7550b30SJaegeuk Kim } 1533a7550b30SJaegeuk Kim return res; 1534a7550b30SJaegeuk Kim } 1535a7550b30SJaegeuk Kim 1536b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1537b8cb5a54STahsin Erdogan if (res) 1538b8cb5a54STahsin Erdogan return res; 15392f8f5e76SEric Biggers retry: 1540af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1541af65207cSTahsin Erdogan &credits); 1542dec214d0STahsin Erdogan if (res) 1543dec214d0STahsin Erdogan return res; 1544dec214d0STahsin Erdogan 1545c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1546a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1547a7550b30SJaegeuk Kim return PTR_ERR(handle); 1548a7550b30SJaegeuk Kim 15492f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15502f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15512f8f5e76SEric Biggers ctx, len, 0); 1552a7550b30SJaegeuk Kim if (!res) { 1553a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15542ee6a576SEric Biggers /* 15552ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15562ee6a576SEric Biggers * S_DAX may be disabled 15572ee6a576SEric Biggers */ 1558043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1559a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1560a7550b30SJaegeuk Kim if (res) 1561a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1562a7550b30SJaegeuk Kim } 1563a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15642f8f5e76SEric Biggers 15652f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15662f8f5e76SEric Biggers goto retry; 1567a7550b30SJaegeuk Kim if (!res) 1568a7550b30SJaegeuk Kim res = res2; 1569a7550b30SJaegeuk Kim return res; 1570a7550b30SJaegeuk Kim } 1571a7550b30SJaegeuk Kim 1572ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1573a7550b30SJaegeuk Kim { 1574ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1575a7550b30SJaegeuk Kim } 1576a7550b30SJaegeuk Kim 1577b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1578b925acb8SEric Biggers { 1579b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1580b925acb8SEric Biggers } 1581b925acb8SEric Biggers 1582b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1583b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1584b925acb8SEric Biggers { 1585b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1586b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1587b925acb8SEric Biggers } 1588b925acb8SEric Biggers 15896f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1590a5d431efSEric Biggers .key_prefix = "ext4:", 1591a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1592a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1593ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1594a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1595b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1596b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1597a7550b30SJaegeuk Kim }; 1598a7550b30SJaegeuk Kim #endif 1599a7550b30SJaegeuk Kim 1600ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1601d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1602689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1603ac27a0ecSDave Kleikamp 1604617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1605617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1606617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1607617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1608617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 16096f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 16108c54ca9cSAl Viro const struct path *path); 1611617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1612ac27a0ecSDave Kleikamp size_t len, loff_t off); 1613617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1614ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16157c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16167c319d32SAditya Kali unsigned int flags); 1617ac27a0ecSDave Kleikamp 161896c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 161996c7e0d9SJan Kara { 162096c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 162196c7e0d9SJan Kara } 162296c7e0d9SJan Kara 162361e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 162460e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1625617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1626617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1627617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1628617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1629a5b5ee32SJan Kara .write_info = ext4_write_info, 1630a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1631a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1632040cb378SLi Xi .get_projid = ext4_get_projid, 16337a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1634ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1635ac27a0ecSDave Kleikamp }; 1636ac27a0ecSDave Kleikamp 16370d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1638617ba13bSMingming Cao .quota_on = ext4_quota_on, 1639ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1640287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16410a240339SJan Kara .get_state = dquot_get_state, 1642287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1643287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16446332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16456332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1646ac27a0ecSDave Kleikamp }; 1647ac27a0ecSDave Kleikamp #endif 1648ac27a0ecSDave Kleikamp 1649ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1650617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 165194053139SAl Viro .free_inode = ext4_free_in_core_inode, 1652617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1653617ba13bSMingming Cao .write_inode = ext4_write_inode, 1654617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16557ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16560930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1657617ba13bSMingming Cao .put_super = ext4_put_super, 1658617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1659c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1660c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1661617ba13bSMingming Cao .statfs = ext4_statfs, 1662617ba13bSMingming Cao .remount_fs = ext4_remount, 1663617ba13bSMingming Cao .show_options = ext4_show_options, 1664ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1665617ba13bSMingming Cao .quota_read = ext4_quota_read, 1666617ba13bSMingming Cao .quota_write = ext4_quota_write, 166796c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1668ac27a0ecSDave Kleikamp #endif 1669ac27a0ecSDave Kleikamp }; 1670ac27a0ecSDave Kleikamp 167139655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16721b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16731b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1674617ba13bSMingming Cao .get_parent = ext4_get_parent, 1675fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1676ac27a0ecSDave Kleikamp }; 1677ac27a0ecSDave Kleikamp 1678ac27a0ecSDave Kleikamp enum { 1679ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1680ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 168172578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1682ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 168372578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1684ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1685ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1686ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16876ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16884f74d15fSEric Biggers Opt_inlinecrypt, 1689ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 16905a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1691ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16929cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 16939cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1694327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1695327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1696670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 16971449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16985328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1699744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1700fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1701cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 170221175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1703e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 17048016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 170599c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 17068016e29fSHarshad Shirwadkar #endif 1707ac27a0ecSDave Kleikamp }; 1708ac27a0ecSDave Kleikamp 1709e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1710e5a185c2SLukas Czerner {"continue", Opt_err_cont}, 1711e5a185c2SLukas Czerner {"panic", Opt_err_panic}, 1712e5a185c2SLukas Czerner {"remount-ro", Opt_err_ro}, 1713e5a185c2SLukas Czerner {} 1714e5a185c2SLukas Czerner }; 1715e5a185c2SLukas Czerner 1716e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1717e5a185c2SLukas Czerner {"journal", Opt_data_journal}, 1718e5a185c2SLukas Czerner {"ordered", Opt_data_ordered}, 1719e5a185c2SLukas Czerner {"writeback", Opt_data_writeback}, 1720e5a185c2SLukas Czerner {} 1721e5a185c2SLukas Czerner }; 1722e5a185c2SLukas Czerner 1723e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1724e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1725e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1726e5a185c2SLukas Czerner {} 1727e5a185c2SLukas Czerner }; 1728e5a185c2SLukas Czerner 1729e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1730e5a185c2SLukas Czerner {"vfsold", Opt_jqfmt_vfsold}, 1731e5a185c2SLukas Czerner {"vfsv0", Opt_jqfmt_vfsv0}, 1732e5a185c2SLukas Czerner {"vfsv1", Opt_jqfmt_vfsv1}, 1733e5a185c2SLukas Czerner {} 1734e5a185c2SLukas Czerner }; 1735e5a185c2SLukas Czerner 1736e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1737e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1738e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1739e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1740e5a185c2SLukas Czerner {} 1741e5a185c2SLukas Czerner }; 1742e5a185c2SLukas Czerner 1743e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1744e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1745e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1746e5a185c2SLukas Czerner 1747e5a185c2SLukas Czerner /* 1748e5a185c2SLukas Czerner * Mount option specification 1749e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1750e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1751e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1752e5a185c2SLukas Czerner * separate for now. 1753e5a185c2SLukas Czerner */ 1754e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1755e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1756e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1757e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1758e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1759e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1760e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1761e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1762e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1763e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1764e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1765e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1766e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1767e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1768e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1769e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1770e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1771e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1772e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1773e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1774e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1775e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1776e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1777e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1778e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1779e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1780e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1781e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1782e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1783e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1784e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1785e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1786e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1787e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1788e5a185c2SLukas Czerner ext4_param_data_err), 1789e5a185c2SLukas Czerner fsparam_string_empty 1790e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1791e5a185c2SLukas Czerner fsparam_string_empty 1792e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1793e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1794e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1795e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1796e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1797e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1798e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1799e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1800e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1801e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1802e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1803e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1804e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1805e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1806e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1807e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1808e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1809e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1810e5a185c2SLukas Czerner fsparam_flag ("lazytime", Opt_lazytime), 1811e5a185c2SLukas Czerner fsparam_flag ("nolazytime", Opt_nolazytime), 1812e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1813e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1814e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1815e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1816e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1817e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1818e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1819e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1820e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1821e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1822e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1823e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1824e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1825e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1826e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1827e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1828e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1829e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1830e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1831e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1832e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1833e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1834e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1835e5a185c2SLukas Czerner #endif 1836e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1837e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1838e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1839e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1840e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1841e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1842e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1843e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1844e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1845e5a185c2SLukas Czerner Opt_removed), 1846e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1847e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1848e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1849e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1850e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1851e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1852e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1853e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1854e5a185c2SLukas Czerner {} 1855e5a185c2SLukas Czerner }; 1856e5a185c2SLukas Czerner 1857a447c093SSteven Whitehouse static const match_table_t tokens = { 1858ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1859ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1860ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1861ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1862ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1863ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1864ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1865ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1866ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1867ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1868ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1869ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1870ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1871ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 187272578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 187372578c33STheodore Ts'o {Opt_removed, "orlov"}, 1874ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1875ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1876ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1877ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1878e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 18795a916be1STheodore Ts'o {Opt_noload, "noload"}, 188072578c33STheodore Ts'o {Opt_removed, "nobh"}, 188172578c33STheodore Ts'o {Opt_removed, "bh"}, 1882ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 188330773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 188430773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1885ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1886ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1887818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1888c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1889818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1890ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1891ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1892ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1893ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 18945bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 18955bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1896ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1897ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1898ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1899ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1900ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1901ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 19025a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1903ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1904ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1905ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1906ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 190749da9392SJan Kara {Opt_prjquota, "prjquota"}, 1908ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 190906705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 191006705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 191125ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1912923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 19139cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 19149cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 19159cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1916c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 191764769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1918327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1919327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1920a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1921a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1922670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1923dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 192436ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 192536ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 19266fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 19276fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1928240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1929b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1930afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 193106705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 193206705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1933744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1934244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1935744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 19365328e635SEric Sandeen {Opt_discard, "discard"}, 19375328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1938fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1939fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1940fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 19418016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 194299c880deSHarshad Shirwadkar {Opt_fc_debug_force, "fc_debug_force"}, 19438016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"}, 19448016e29fSHarshad Shirwadkar #endif 1945df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1946ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 19476ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 19484f74d15fSEric Biggers {Opt_inlinecrypt, "inlinecrypt"}, 1949cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1950cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 195121175ca4SHarshad Shirwadkar {Opt_removed, "prefetch_block_bitmaps"}, 195221175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, 1953196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, 1954c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1955c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1956c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1957c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1958c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1959f3f12faaSJosef Bacik {Opt_err, NULL}, 1960ac27a0ecSDave Kleikamp }; 1961ac27a0ecSDave Kleikamp 1962617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1963ac27a0ecSDave Kleikamp { 1964617ba13bSMingming Cao ext4_fsblk_t sb_block; 1965ac27a0ecSDave Kleikamp char *options = (char *) *data; 1966ac27a0ecSDave Kleikamp 1967ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1968ac27a0ecSDave Kleikamp return 1; /* Default location */ 19690b8e58a1SAndreas Dilger 1970ac27a0ecSDave Kleikamp options += 3; 19710b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1972ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1973ac27a0ecSDave Kleikamp if (*options && *options != ',') { 19744776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1975ac27a0ecSDave Kleikamp (char *) *data); 1976ac27a0ecSDave Kleikamp return 1; 1977ac27a0ecSDave Kleikamp } 1978ac27a0ecSDave Kleikamp if (*options == ',') 1979ac27a0ecSDave Kleikamp options++; 1980ac27a0ecSDave Kleikamp *data = (void *) options; 19810b8e58a1SAndreas Dilger 1982ac27a0ecSDave Kleikamp return sb_block; 1983ac27a0ecSDave Kleikamp } 1984ac27a0ecSDave Kleikamp 1985b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1986196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1987196e402aSHarshad Shirwadkar 1988d6006186SEric Biggers static const char deprecated_msg[] = 1989d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1990437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1991b3881f74STheodore Ts'o 199226092bf5STheodore Ts'o #define MOPT_SET 0x0001 199326092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 199426092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 199526092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 199626092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 199726092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 199826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 199926092bf5STheodore Ts'o #define MOPT_Q 0 200026092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 200126092bf5STheodore Ts'o #else 200226092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 200326092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 200426092bf5STheodore Ts'o #endif 200526092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 20068dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 20078dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 20088dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 2009ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 20109cb20f94SIra Weiny #define MOPT_SKIP 0x0800 2011995a3ed6SHarshad Shirwadkar #define MOPT_2 0x1000 201226092bf5STheodore Ts'o 201326092bf5STheodore Ts'o static const struct mount_opts { 201426092bf5STheodore Ts'o int token; 201526092bf5STheodore Ts'o int mount_opt; 201626092bf5STheodore Ts'o int flags; 201726092bf5STheodore Ts'o } ext4_mount_opts[] = { 201826092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 201926092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 202026092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 202126092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 202226092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 202326092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 20248dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 20258dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 20268dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 20278dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 202826092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 202926092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 20308dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 20318dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20328dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 203359d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 2034327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 2035327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 2036c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 2037c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 20388dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 20391e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 204026092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 20418dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 20421e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20438dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 204426092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 204526092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 204626092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 20478dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 20487915a861SAles Novak MOPT_NO_EXT2}, 20498dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 20507915a861SAles Novak MOPT_NO_EXT2}, 205126092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 205226092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 205326092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 205426092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 205526092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 205626092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 205726092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 205826092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 205926092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 206026092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 20619cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 20629cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 20639cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 20649cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 20659cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 20669cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 20679cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 206826092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 20690efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 20700efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 20715ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 20725ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 20735ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 20748dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 20758dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 20768dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 20778dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 207826092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 207926092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 208026092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 208126092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 208226092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 208326092bf5STheodore Ts'o #else 208426092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 208526092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 208626092bf5STheodore Ts'o #endif 208726092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 208826092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 2089670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 209026092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 209126092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 209226092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 209326092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 209426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 209549da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 209649da9392SJan Kara MOPT_SET | MOPT_Q}, 209726092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 209849da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 209949da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 2100174fe5baSKaixu Xia {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING}, 2101174fe5baSKaixu Xia {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING}, 210226092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 210326092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 210426092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 210526092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 210626092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 2107df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 2108ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 2109cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 211021175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 21113d392b26STheodore Ts'o MOPT_SET}, 2112196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, 211399c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 21140f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 21150f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 21168016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, 0, MOPT_GTE0}, 21178016e29fSHarshad Shirwadkar #endif 211826092bf5STheodore Ts'o {Opt_err, 0, 0} 211926092bf5STheodore Ts'o }; 212026092bf5STheodore Ts'o 2121c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 2122c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 2123c83ad55eSGabriel Krisman Bertazi __u16 magic; 2124c83ad55eSGabriel Krisman Bertazi char *name; 2125c83ad55eSGabriel Krisman Bertazi char *version; 2126c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 2127c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 2128c83ad55eSGabriel Krisman Bertazi }; 2129c83ad55eSGabriel Krisman Bertazi 2130c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 2131c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 2132c83ad55eSGabriel Krisman Bertazi __u16 *flags) 2133c83ad55eSGabriel Krisman Bertazi { 2134c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 2135c83ad55eSGabriel Krisman Bertazi int i; 2136c83ad55eSGabriel Krisman Bertazi 2137c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 2138c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 2139c83ad55eSGabriel Krisman Bertazi break; 2140c83ad55eSGabriel Krisman Bertazi 2141c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 2142c83ad55eSGabriel Krisman Bertazi return -EINVAL; 2143c83ad55eSGabriel Krisman Bertazi 2144c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 2145c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 2146c83ad55eSGabriel Krisman Bertazi 2147c83ad55eSGabriel Krisman Bertazi return 0; 2148c83ad55eSGabriel Krisman Bertazi } 2149c83ad55eSGabriel Krisman Bertazi #endif 2150c83ad55eSGabriel Krisman Bertazi 2151*6e47a3ccSLukas Czerner static int ext4_set_test_dummy_encryption(struct super_block *sb, char *arg) 2152ed318a6cSEric Biggers { 2153ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 2154ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 2155ed318a6cSEric Biggers int err; 2156ed318a6cSEric Biggers 2157*6e47a3ccSLukas Czerner err = fscrypt_set_test_dummy_encryption(sb, arg, 2158ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2159ed318a6cSEric Biggers if (err) { 2160ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2161*6e47a3ccSLukas Czerner "Error while setting test dummy encryption [%d]", err); 2162*6e47a3ccSLukas Czerner return err; 2163ed318a6cSEric Biggers } 2164ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2165ed318a6cSEric Biggers #endif 2166*6e47a3ccSLukas Czerner return 0; 2167ed318a6cSEric Biggers } 2168ed318a6cSEric Biggers 2169*6e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 2170*6e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 2171*6e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 2172*6e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 2173*6e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 2174*6e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 2175*6e47a3ccSLukas Czerner #define EXT4_SPEC_DUMMY_ENCRYPTION (1 << 6) 2176*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 2177*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 2178*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 2179*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 2180*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 2181*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 2182*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 2183*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 2184*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 2185*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 2186*6e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 2187*6e47a3ccSLukas Czerner 2188461c3af0SLukas Czerner struct ext4_fs_context { 2189e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 2190*6e47a3ccSLukas Czerner char *test_dummy_enc_arg; 2191e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 2192196e402aSHarshad Shirwadkar int mb_optimize_scan; 2193*6e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 2194*6e47a3ccSLukas Czerner int s_fc_debug_max_replay; 2195*6e47a3ccSLukas Czerner #endif 2196*6e47a3ccSLukas Czerner unsigned short qname_spec; 2197*6e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 2198*6e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 2199*6e47a3ccSLukas Czerner unsigned long journal_devnum; 2200*6e47a3ccSLukas Czerner unsigned long s_commit_interval; 2201*6e47a3ccSLukas Czerner unsigned long s_stripe; 2202*6e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 2203*6e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 2204*6e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 2205*6e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 2206*6e47a3ccSLukas Czerner unsigned int journal_ioprio; 2207*6e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 2208*6e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 2209*6e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 2210*6e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 2211*6e47a3ccSLukas Czerner unsigned int vals_s_mount_flags; 2212*6e47a3ccSLukas Czerner unsigned int mask_s_mount_flags; 2213b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 2214*6e47a3ccSLukas Czerner unsigned int spec; 2215*6e47a3ccSLukas Czerner u32 s_max_batch_time; 2216*6e47a3ccSLukas Czerner u32 s_min_batch_time; 2217*6e47a3ccSLukas Czerner kuid_t s_resuid; 2218*6e47a3ccSLukas Czerner kgid_t s_resgid; 2219b237e304SHarshad Shirwadkar }; 2220b237e304SHarshad Shirwadkar 2221e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2222e6e268cbSLukas Czerner /* 2223e6e268cbSLukas Czerner * Note the name of the specified quota file. 2224e6e268cbSLukas Czerner */ 2225e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2226e6e268cbSLukas Czerner struct fs_parameter *param) 2227e6e268cbSLukas Czerner { 2228e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2229e6e268cbSLukas Czerner char *qname; 2230e6e268cbSLukas Czerner 2231e6e268cbSLukas Czerner if (param->size < 1) { 2232e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2233e6e268cbSLukas Czerner return -EINVAL; 2234e6e268cbSLukas Czerner } 2235e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2236e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2237e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2238e6e268cbSLukas Czerner return -EINVAL; 2239e6e268cbSLukas Czerner } 2240e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2241e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2242e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2243e6e268cbSLukas Czerner "%s quota file already specified", 2244e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2245e6e268cbSLukas Czerner return -EINVAL; 2246e6e268cbSLukas Czerner } 2247e6e268cbSLukas Czerner return 0; 2248e6e268cbSLukas Czerner } 2249e6e268cbSLukas Czerner 2250e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2251e6e268cbSLukas Czerner if (!qname) { 2252e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2253e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2254e6e268cbSLukas Czerner return -ENOMEM; 2255e6e268cbSLukas Czerner } 2256e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2257e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 2258*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2259e6e268cbSLukas Czerner return 0; 2260e6e268cbSLukas Czerner } 2261e6e268cbSLukas Czerner 2262e6e268cbSLukas Czerner /* 2263e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2264e6e268cbSLukas Czerner */ 2265e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2266e6e268cbSLukas Czerner { 2267e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2268e6e268cbSLukas Czerner 2269e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2270e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2271e6e268cbSLukas Czerner 2272e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2273e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 2274*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2275e6e268cbSLukas Czerner return 0; 2276e6e268cbSLukas Czerner } 2277e6e268cbSLukas Czerner #endif 2278e6e268cbSLukas Czerner 2279*6e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 2280*6e47a3ccSLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, int flag)\ 2281*6e47a3ccSLukas Czerner { \ 2282*6e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 2283*6e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2284*6e47a3ccSLukas Czerner } \ 2285*6e47a3ccSLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, int flag)\ 2286*6e47a3ccSLukas Czerner { \ 2287*6e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 2288*6e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2289*6e47a3ccSLukas Czerner } \ 2290*6e47a3ccSLukas Czerner static inline bool ctx_test_##name(struct ext4_fs_context *ctx, int flag)\ 2291*6e47a3ccSLukas Czerner { \ 2292*6e47a3ccSLukas Czerner return ((ctx->vals_s_##name & flag) != 0); \ 2293*6e47a3ccSLukas Czerner } \ 2294*6e47a3ccSLukas Czerner 2295*6e47a3ccSLukas Czerner EXT4_SET_CTX(flags); 2296*6e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2297*6e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2298*6e47a3ccSLukas Czerner EXT4_SET_CTX(mount_flags); 2299*6e47a3ccSLukas Czerner 2300461c3af0SLukas Czerner static int handle_mount_opt(struct fs_context *fc, struct fs_parameter *param) 230126092bf5STheodore Ts'o { 2302461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2303461c3af0SLukas Czerner struct fs_parse_result result; 230426092bf5STheodore Ts'o const struct mount_opts *m; 2305461c3af0SLukas Czerner int is_remount; 230608cefc7aSEric W. Biederman kuid_t uid; 230708cefc7aSEric W. Biederman kgid_t gid; 2308461c3af0SLukas Czerner int token; 2309461c3af0SLukas Czerner 2310461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2311461c3af0SLukas Czerner if (token < 0) 2312461c3af0SLukas Czerner return token; 2313461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 231426092bf5STheodore Ts'o 231557f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2316461c3af0SLukas Czerner if (token == Opt_usrjquota) { 2317461c3af0SLukas Czerner if (!*param->string) 2318e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2319461c3af0SLukas Czerner else 2320e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2321461c3af0SLukas Czerner } else if (token == Opt_grpjquota) { 2322461c3af0SLukas Czerner if (!*param->string) 2323e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2324461c3af0SLukas Czerner else 2325e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 2326461c3af0SLukas Czerner } 232757f73c2cSTheodore Ts'o #endif 232826092bf5STheodore Ts'o switch (token) { 2329f7048605STheodore Ts'o case Opt_noacl: 2330f7048605STheodore Ts'o case Opt_nouser_xattr: 2331da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "3.5"); 2332f7048605STheodore Ts'o break; 233326092bf5STheodore Ts'o case Opt_sb: 233426092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 233526092bf5STheodore Ts'o case Opt_removed: 2336da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2337461c3af0SLukas Czerner param->key); 233826092bf5STheodore Ts'o return 1; 233926092bf5STheodore Ts'o case Opt_abort: 2340*6e47a3ccSLukas Czerner ctx_set_mount_flags(ctx, EXT4_MF_FS_ABORTED); 234126092bf5STheodore Ts'o return 1; 234226092bf5STheodore Ts'o case Opt_i_version: 2343*6e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_I_VERSION); 234426092bf5STheodore Ts'o return 1; 2345a26f4992STheodore Ts'o case Opt_lazytime: 2346*6e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_LAZYTIME); 2347a26f4992STheodore Ts'o return 1; 2348a26f4992STheodore Ts'o case Opt_nolazytime: 2349*6e47a3ccSLukas Czerner ctx_clear_flags(ctx, SB_LAZYTIME); 2350a26f4992STheodore Ts'o return 1; 23514f74d15fSEric Biggers case Opt_inlinecrypt: 23524f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 2353*6e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 23544f74d15fSEric Biggers #else 2355da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 23564f74d15fSEric Biggers #endif 23574f74d15fSEric Biggers return 1; 2358461c3af0SLukas Czerner case Opt_errors: 2359461c3af0SLukas Czerner case Opt_data: 2360461c3af0SLukas Czerner case Opt_data_err: 2361461c3af0SLukas Czerner case Opt_jqfmt: 2362461c3af0SLukas Czerner case Opt_dax_type: 2363461c3af0SLukas Czerner token = result.uint_32; 236426092bf5STheodore Ts'o } 236526092bf5STheodore Ts'o 23665f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 23675f3633e3SJan Kara if (token == m->token) 23685f3633e3SJan Kara break; 23695f3633e3SJan Kara 2370b6bd2435SLukas Czerner ctx->opt_flags |= m->flags; 2371b6bd2435SLukas Czerner 23725f3633e3SJan Kara if (m->token == Opt_err) { 2373da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Unrecognized mount option \"%s\" " 2374461c3af0SLukas Czerner "or missing value", param->key); 2375da812f61SLukas Czerner return -EINVAL; 23765f3633e3SJan Kara } 23775f3633e3SJan Kara 2378c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 2379c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2380*6e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 23811e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2382*6e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, 2383*6e47a3ccSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2384c93cf2d7SDmitry Monakhov } else 2385da812f61SLukas Czerner return -EINVAL; 2386c93cf2d7SDmitry Monakhov } 238726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 2388*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 238926092bf5STheodore Ts'o 239026092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 2391da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2392461c3af0SLukas Czerner param->key); 239326092bf5STheodore Ts'o } else if (token == Opt_commit) { 2394461c3af0SLukas Czerner if (result.uint_32 == 0) 2395*6e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2396461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2397da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 23989ba55543Szhangyi (F) "Invalid commit interval %d, " 23999ba55543Szhangyi (F) "must be smaller than %d", 2400461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2401da812f61SLukas Czerner return -EINVAL; 24029ba55543Szhangyi (F) } 2403*6e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 2404*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2405670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 2406*6e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2407da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2408461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2409da812f61SLukas Czerner return -EINVAL; 24109803387cSTheodore Ts'o } 2411*6e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 2412*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 241326092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 2414*6e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 2415*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 241626092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 2417*6e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 2418*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 241926092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2420461c3af0SLukas Czerner if (result.uint_32 && 2421461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2422461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2423da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2424e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2425e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2426da812f61SLukas Czerner return -EINVAL; 242726092bf5STheodore Ts'o } 2428*6e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 2429*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 243026092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 2431*6e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 2432*6e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2433461c3af0SLukas Czerner if (param->type == fs_value_is_string) 2434*6e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 2435*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2436df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 2437*6e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 2438*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 24398016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 24408016e29fSHarshad Shirwadkar } else if (token == Opt_fc_debug_max_replay) { 2441*6e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 2442*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 24438016e29fSHarshad Shirwadkar #endif 244426092bf5STheodore Ts'o } else if (token == Opt_stripe) { 2445*6e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 2446*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 24470efb3b23SJan Kara } else if (token == Opt_resuid) { 2448461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 24490efb3b23SJan Kara if (!uid_valid(uid)) { 2450da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2451461c3af0SLukas Czerner result.uint_32); 2452da812f61SLukas Czerner return -EINVAL; 24530efb3b23SJan Kara } 2454*6e47a3ccSLukas Czerner ctx->s_resuid = uid; 2455*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 24560efb3b23SJan Kara } else if (token == Opt_resgid) { 2457461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 24580efb3b23SJan Kara if (!gid_valid(gid)) { 2459da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2460461c3af0SLukas Czerner result.uint_32); 2461da812f61SLukas Czerner return -EINVAL; 24620efb3b23SJan Kara } 2463*6e47a3ccSLukas Czerner ctx->s_resgid = gid; 2464*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 24650efb3b23SJan Kara } else if (token == Opt_journal_dev) { 24660efb3b23SJan Kara if (is_remount) { 2467da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 24680efb3b23SJan Kara "Cannot specify journal on remount"); 2469da812f61SLukas Czerner return -EINVAL; 24700efb3b23SJan Kara } 2471461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 2472*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2473ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2474ad4eec61SEric Sandeen struct inode *journal_inode; 2475ad4eec61SEric Sandeen struct path path; 2476ad4eec61SEric Sandeen int error; 2477ad4eec61SEric Sandeen 2478ad4eec61SEric Sandeen if (is_remount) { 2479da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2480ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2481da812f61SLukas Czerner return -EINVAL; 2482ad4eec61SEric Sandeen } 2483ad4eec61SEric Sandeen 2484461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2485ad4eec61SEric Sandeen if (error) { 2486da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2487461c3af0SLukas Czerner "journal device path"); 2488da812f61SLukas Czerner return -EINVAL; 2489ad4eec61SEric Sandeen } 2490ad4eec61SEric Sandeen 24912b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2492461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 2493*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2494ad4eec61SEric Sandeen path_put(&path); 24950efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 2496461c3af0SLukas Czerner if (result.uint_32 > 7) { 2497da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 24980efb3b23SJan Kara " (must be 0-7)"); 2499da812f61SLukas Czerner return -EINVAL; 25000efb3b23SJan Kara } 2501461c3af0SLukas Czerner ctx->journal_ioprio = 2502461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 2503*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 25046ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 2505*6e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 2506*6e47a3ccSLukas Czerner if (param->type == fs_value_is_flag) { 2507*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 2508*6e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = NULL; 2509*6e47a3ccSLukas Czerner return 1; 2510*6e47a3ccSLukas Czerner } 2511*6e47a3ccSLukas Czerner if (*param->string && 2512*6e47a3ccSLukas Czerner !(!strcmp(param->string, "v1") || 2513*6e47a3ccSLukas Czerner !strcmp(param->string, "v2"))) { 2514*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 2515*6e47a3ccSLukas Czerner "Value of option \"%s\" is unrecognized", 2516*6e47a3ccSLukas Czerner param->key); 2517da812f61SLukas Czerner return -EINVAL; 251826092bf5STheodore Ts'o } 2519*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 2520*6e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = kmemdup_nul(param->string, param->size, 2521*6e47a3ccSLukas Czerner GFP_KERNEL); 2522*6e47a3ccSLukas Czerner #else 2523*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 2524*6e47a3ccSLukas Czerner "Test dummy encryption mount option ignored"); 2525*6e47a3ccSLukas Czerner #endif 2526*6e47a3ccSLukas Czerner } else if (m->flags & MOPT_DATAJ) { 2527*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2528*6e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2529*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 253026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 253126092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 2532e6e268cbSLukas Czerner ctx->s_jquota_fmt = m->mount_opt; 2533*6e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 253426092bf5STheodore Ts'o #endif 25359cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 25369cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2537ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 25389cb20f94SIra Weiny switch (token) { 25399cb20f94SIra Weiny case Opt_dax: 25409cb20f94SIra Weiny case Opt_dax_always: 2541*6e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2542*6e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 25439cb20f94SIra Weiny break; 25449cb20f94SIra Weiny case Opt_dax_never: 2545*6e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2546*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 25479cb20f94SIra Weiny break; 25489cb20f94SIra Weiny case Opt_dax_inode: 2549*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 2550*6e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 25519cb20f94SIra Weiny /* Strictly for printing options */ 2552*6e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 25539cb20f94SIra Weiny break; 25549cb20f94SIra Weiny } 2555ef83b6e8SDan Williams #else 2556da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2557*6e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 2558*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 2559da812f61SLukas Czerner return -EINVAL; 2560923ae0ffSRoss Zwisler #endif 25617915a861SAles Novak } else if (token == Opt_data_err_abort) { 2562*6e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 25637915a861SAles Novak } else if (token == Opt_data_err_ignore) { 2564*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2565196e402aSHarshad Shirwadkar } else if (token == Opt_mb_optimize_scan) { 2566461c3af0SLukas Czerner if (result.int_32 != 0 && result.int_32 != 1) { 2567da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2568196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2569da812f61SLukas Czerner return -EINVAL; 2570196e402aSHarshad Shirwadkar } 2571461c3af0SLukas Czerner ctx->mb_optimize_scan = result.int_32; 257226092bf5STheodore Ts'o } else { 2573461c3af0SLukas Czerner unsigned int set = 0; 2574461c3af0SLukas Czerner 2575461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2576461c3af0SLukas Czerner result.uint_32 > 0) 2577461c3af0SLukas Czerner set = 1; 2578461c3af0SLukas Czerner 257926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2580461c3af0SLukas Czerner set = !set; 258126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2582da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2583461c3af0SLukas Czerner "buggy handling of option %s", 2584461c3af0SLukas Czerner param->key); 258526092bf5STheodore Ts'o WARN_ON(1); 2586da812f61SLukas Czerner return -EINVAL; 258726092bf5STheodore Ts'o } 2588995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2589461c3af0SLukas Czerner if (set != 0) 2590*6e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2591995a3ed6SHarshad Shirwadkar else 2592*6e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2593995a3ed6SHarshad Shirwadkar } else { 2594461c3af0SLukas Czerner if (set != 0) 2595*6e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 259626092bf5STheodore Ts'o else 2597*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 259826092bf5STheodore Ts'o } 2599995a3ed6SHarshad Shirwadkar } 260026092bf5STheodore Ts'o return 1; 260126092bf5STheodore Ts'o } 260226092bf5STheodore Ts'o 2603ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 2604e6e268cbSLukas Czerner struct ext4_fs_context *ctx, 2605661aa520SEric Sandeen int is_remount) 2606ac27a0ecSDave Kleikamp { 2607461c3af0SLukas Czerner struct fs_parameter param; 2608461c3af0SLukas Czerner struct fs_context fc; 2609461c3af0SLukas Czerner int ret; 2610461c3af0SLukas Czerner char *key; 2611ac27a0ecSDave Kleikamp 2612ac27a0ecSDave Kleikamp if (!options) 2613ac27a0ecSDave Kleikamp return 1; 2614ac27a0ecSDave Kleikamp 2615461c3af0SLukas Czerner memset(&fc, 0, sizeof(fc)); 2616e6e268cbSLukas Czerner fc.fs_private = ctx; 2617461c3af0SLukas Czerner fc.s_fs_info = EXT4_SB(sb); 2618461c3af0SLukas Czerner 2619461c3af0SLukas Czerner if (is_remount) 2620461c3af0SLukas Czerner fc.purpose = FS_CONTEXT_FOR_RECONFIGURE; 2621461c3af0SLukas Czerner 2622461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2623461c3af0SLukas Czerner if (*key) { 2624461c3af0SLukas Czerner size_t v_len = 0; 2625461c3af0SLukas Czerner char *value = strchr(key, '='); 2626461c3af0SLukas Czerner 2627461c3af0SLukas Czerner param.type = fs_value_is_flag; 2628461c3af0SLukas Czerner param.string = NULL; 2629461c3af0SLukas Czerner 2630461c3af0SLukas Czerner if (value) { 2631461c3af0SLukas Czerner if (value == key) 2632ac27a0ecSDave Kleikamp continue; 2633461c3af0SLukas Czerner 2634461c3af0SLukas Czerner *value++ = 0; 2635461c3af0SLukas Czerner v_len = strlen(value); 2636461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2637461c3af0SLukas Czerner GFP_KERNEL); 2638461c3af0SLukas Czerner if (!param.string) 2639461c3af0SLukas Czerner return 0; 2640461c3af0SLukas Czerner param.type = fs_value_is_string; 2641461c3af0SLukas Czerner } 2642461c3af0SLukas Czerner 2643461c3af0SLukas Czerner param.key = key; 2644461c3af0SLukas Czerner param.size = v_len; 2645461c3af0SLukas Czerner 2646461c3af0SLukas Czerner ret = handle_mount_opt(&fc, ¶m); 2647461c3af0SLukas Czerner if (param.string) 2648461c3af0SLukas Czerner kfree(param.string); 2649461c3af0SLukas Czerner if (ret < 0) 2650ac27a0ecSDave Kleikamp return 0; 2651ac27a0ecSDave Kleikamp } 2652461c3af0SLukas Czerner } 2653461c3af0SLukas Czerner 2654da812f61SLukas Czerner ret = ext4_validate_options(&fc); 2655da812f61SLukas Czerner if (ret < 0) 2656da812f61SLukas Czerner return 0; 2657da812f61SLukas Czerner 2658b6bd2435SLukas Czerner ret = ext4_check_opt_consistency(&fc, sb); 2659e6e268cbSLukas Czerner if (ret < 0) 2660e6e268cbSLukas Czerner return 0; 2661e6e268cbSLukas Czerner 2662*6e47a3ccSLukas Czerner ret = ext4_apply_options(&fc, sb); 2663*6e47a3ccSLukas Czerner if (ret < 0) 2664*6e47a3ccSLukas Czerner return 0; 2665e6e268cbSLukas Czerner 2666da812f61SLukas Czerner return 1; 26674c94bff9SLukas Czerner } 26684c94bff9SLukas Czerner 2669e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2670e6e268cbSLukas Czerner struct super_block *sb) 2671e6e268cbSLukas Czerner { 2672e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2673*6e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2674e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2675e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2676e6e268cbSLukas Czerner char *qname; 2677e6e268cbSLukas Czerner int i; 2678e6e268cbSLukas Czerner 2679*6e47a3ccSLukas Czerner if (quota_feature) 2680*6e47a3ccSLukas Czerner return; 2681*6e47a3ccSLukas Czerner 2682*6e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2683e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2684e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2685e6e268cbSLukas Czerner continue; 2686*6e47a3ccSLukas Czerner 2687e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 2688e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 2689e6e268cbSLukas Czerner kfree(sbi->s_qf_names[i]); 2690e6e268cbSLukas Czerner rcu_assign_pointer(sbi->s_qf_names[i], qname); 2691e6e268cbSLukas Czerner set_opt(sb, QUOTA); 2692e6e268cbSLukas Czerner } 2693*6e47a3ccSLukas Czerner } 2694*6e47a3ccSLukas Czerner 2695*6e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 2696*6e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2697e6e268cbSLukas Czerner #endif 2698e6e268cbSLukas Czerner } 2699e6e268cbSLukas Czerner 2700e6e268cbSLukas Czerner /* 2701e6e268cbSLukas Czerner * Check quota settings consistency. 2702e6e268cbSLukas Czerner */ 2703e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2704e6e268cbSLukas Czerner struct super_block *sb) 2705e6e268cbSLukas Czerner { 2706e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2707e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2708e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2709e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2710e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 2711*6e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 2712*6e47a3ccSLukas Czerner int quota_flags, i; 2713e6e268cbSLukas Czerner 2714*6e47a3ccSLukas Czerner /* 2715*6e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 2716*6e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 2717*6e47a3ccSLukas Czerner * to support legacy quotas in quota files. 2718*6e47a3ccSLukas Czerner */ 2719*6e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 2720*6e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 2721*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 2722*6e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 2723*6e47a3ccSLukas Czerner return -EINVAL; 2724*6e47a3ccSLukas Czerner } 2725*6e47a3ccSLukas Czerner 2726*6e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 2727*6e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 2728*6e47a3ccSLukas Czerner if (quota_loaded && 2729*6e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 2730*6e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 2731*6e47a3ccSLukas Czerner goto err_quota_change; 2732*6e47a3ccSLukas Czerner 2733*6e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2734e6e268cbSLukas Czerner 2735e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2736e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2737e6e268cbSLukas Czerner continue; 2738e6e268cbSLukas Czerner 2739*6e47a3ccSLukas Czerner if (quota_loaded && 2740*6e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2741e6e268cbSLukas Czerner goto err_jquota_change; 2742e6e268cbSLukas Czerner 2743e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 2744e6e268cbSLukas Czerner strcmp(sbi->s_qf_names[i], 2745e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2746e6e268cbSLukas Czerner goto err_jquota_specified; 2747e6e268cbSLukas Czerner } 2748*6e47a3ccSLukas Czerner 2749*6e47a3ccSLukas Czerner if (quota_feature) { 2750*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 2751*6e47a3ccSLukas Czerner "Journaled quota options ignored when " 2752*6e47a3ccSLukas Czerner "QUOTA feature is enabled"); 2753*6e47a3ccSLukas Czerner return 0; 2754*6e47a3ccSLukas Czerner } 2755e6e268cbSLukas Czerner } 2756e6e268cbSLukas Czerner 2757*6e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2758e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 2759*6e47a3ccSLukas Czerner goto err_jquota_change; 2760e6e268cbSLukas Czerner if (quota_feature) { 2761e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2762e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2763e6e268cbSLukas Czerner return 0; 2764e6e268cbSLukas Czerner } 2765e6e268cbSLukas Czerner } 2766*6e47a3ccSLukas Czerner 2767*6e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 2768*6e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 2769*6e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 2770*6e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 2771*6e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 2772*6e47a3ccSLukas Czerner 2773*6e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 2774*6e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 2775*6e47a3ccSLukas Czerner 2776*6e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 2777*6e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 2778*6e47a3ccSLukas Czerner 2779*6e47a3ccSLukas Czerner if (usr_qf_name) { 2780*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2781*6e47a3ccSLukas Czerner usrquota = false; 2782*6e47a3ccSLukas Czerner } 2783*6e47a3ccSLukas Czerner if (grp_qf_name) { 2784*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2785*6e47a3ccSLukas Czerner grpquota = false; 2786*6e47a3ccSLukas Czerner } 2787*6e47a3ccSLukas Czerner 2788*6e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 2789*6e47a3ccSLukas Czerner if (usrquota || grpquota) { 2790*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2791*6e47a3ccSLukas Czerner "format mixing"); 2792*6e47a3ccSLukas Czerner return -EINVAL; 2793*6e47a3ccSLukas Czerner } 2794*6e47a3ccSLukas Czerner 2795*6e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 2796*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 2797*6e47a3ccSLukas Czerner "not specified"); 2798*6e47a3ccSLukas Czerner return -EINVAL; 2799*6e47a3ccSLukas Czerner } 2800*6e47a3ccSLukas Czerner } 2801*6e47a3ccSLukas Czerner 2802e6e268cbSLukas Czerner return 0; 2803e6e268cbSLukas Czerner 2804e6e268cbSLukas Czerner err_quota_change: 2805e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2806e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2807e6e268cbSLukas Czerner return -EINVAL; 2808e6e268cbSLukas Czerner err_jquota_change: 2809e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2810e6e268cbSLukas Czerner "options when quota turned on"); 2811e6e268cbSLukas Czerner return -EINVAL; 2812e6e268cbSLukas Czerner err_jquota_specified: 2813e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2814e6e268cbSLukas Czerner QTYPE2NAME(i)); 2815e6e268cbSLukas Czerner return -EINVAL; 2816e6e268cbSLukas Czerner #else 2817e6e268cbSLukas Czerner return 0; 2818e6e268cbSLukas Czerner #endif 2819e6e268cbSLukas Czerner } 2820e6e268cbSLukas Czerner 2821b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2822b6bd2435SLukas Czerner struct super_block *sb) 2823b6bd2435SLukas Czerner { 2824b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2825*6e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 2826*6e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 2827b6bd2435SLukas Czerner 2828b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2829b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2830b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2831b6bd2435SLukas Czerner return -EINVAL; 2832b6bd2435SLukas Czerner } 2833b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2834b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2835b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2836b6bd2435SLukas Czerner return -EINVAL; 2837b6bd2435SLukas Czerner } 2838b6bd2435SLukas Czerner 2839*6e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 2840*6e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 2841*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 2842*6e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 2843*6e47a3ccSLukas Czerner ctx->s_want_extra_isize); 2844*6e47a3ccSLukas Czerner return -EINVAL; 2845*6e47a3ccSLukas Czerner } 2846*6e47a3ccSLukas Czerner 2847*6e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 2848*6e47a3ccSLukas Czerner int blocksize = 2849*6e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2850*6e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 2851*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 2852*6e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 2853*6e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 2854*6e47a3ccSLukas Czerner } 2855*6e47a3ccSLukas Czerner 2856*6e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 2857*6e47a3ccSLukas Czerner /* 2858*6e47a3ccSLukas Czerner * This mount option is just for testing, and it's not worthwhile to 2859*6e47a3ccSLukas Czerner * implement the extra complexity (e.g. RCU protection) that would be 2860*6e47a3ccSLukas Czerner * needed to allow it to be set or changed during remount. We do allow 2861*6e47a3ccSLukas Czerner * it to be specified during remount, but only if there is no change. 2862*6e47a3ccSLukas Czerner */ 2863*6e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) && 2864*6e47a3ccSLukas Czerner is_remount && !sbi->s_dummy_enc_policy.policy) { 2865*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 2866*6e47a3ccSLukas Czerner "Can't set test_dummy_encryption on remount"); 2867*6e47a3ccSLukas Czerner return -1; 2868*6e47a3ccSLukas Czerner } 2869*6e47a3ccSLukas Czerner #endif 2870*6e47a3ccSLukas Czerner 2871*6e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 2872*6e47a3ccSLukas Czerner if (!sbi->s_journal) { 2873*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 2874*6e47a3ccSLukas Czerner "Remounting file system with no journal " 2875*6e47a3ccSLukas Czerner "so ignoring journalled data option"); 2876*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2877*6e47a3ccSLukas Czerner } else if (ctx->mask_s_mount_opt & EXT4_MOUNT_DATA_FLAGS) { 2878*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 2879*6e47a3ccSLukas Czerner "on remount"); 2880*6e47a3ccSLukas Czerner return -EINVAL; 2881*6e47a3ccSLukas Czerner } 2882*6e47a3ccSLukas Czerner } 2883*6e47a3ccSLukas Czerner 2884*6e47a3ccSLukas Czerner if (is_remount) { 2885*6e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 2886*6e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 2887*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 2888*6e47a3ccSLukas Czerner "both data=journal and dax"); 2889*6e47a3ccSLukas Czerner return -EINVAL; 2890*6e47a3ccSLukas Czerner } 2891*6e47a3ccSLukas Czerner 2892*6e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 2893*6e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2894*6e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 2895*6e47a3ccSLukas Czerner fail_dax_change_remount: 2896*6e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 2897*6e47a3ccSLukas Czerner "dax mount option while remounting"); 2898*6e47a3ccSLukas Czerner return -EINVAL; 2899*6e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 2900*6e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2901*6e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 2902*6e47a3ccSLukas Czerner goto fail_dax_change_remount; 2903*6e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 2904*6e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2905*6e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2906*6e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 2907*6e47a3ccSLukas Czerner goto fail_dax_change_remount; 2908*6e47a3ccSLukas Czerner } 2909*6e47a3ccSLukas Czerner } 2910*6e47a3ccSLukas Czerner 2911b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2912b6bd2435SLukas Czerner } 2913b6bd2435SLukas Czerner 2914*6e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb) 2915*6e47a3ccSLukas Czerner { 2916*6e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2917*6e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 2918*6e47a3ccSLukas Czerner int ret = 0; 2919*6e47a3ccSLukas Czerner 2920*6e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 2921*6e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 2922*6e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 2923*6e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 2924*6e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 2925*6e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 2926*6e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 2927*6e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 2928*6e47a3ccSLukas Czerner 2929*6e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 2930*6e47a3ccSLukas Czerner APPLY(s_commit_interval); 2931*6e47a3ccSLukas Czerner APPLY(s_stripe); 2932*6e47a3ccSLukas Czerner APPLY(s_max_batch_time); 2933*6e47a3ccSLukas Czerner APPLY(s_min_batch_time); 2934*6e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 2935*6e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 2936*6e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 2937*6e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 2938*6e47a3ccSLukas Czerner APPLY(s_resgid); 2939*6e47a3ccSLukas Czerner APPLY(s_resuid); 2940*6e47a3ccSLukas Czerner 2941*6e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 2942*6e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 2943*6e47a3ccSLukas Czerner #endif 2944*6e47a3ccSLukas Czerner 2945*6e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 2946*6e47a3ccSLukas Czerner 2947*6e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) 2948*6e47a3ccSLukas Czerner ret = ext4_set_test_dummy_encryption(sb, ctx->test_dummy_enc_arg); 2949*6e47a3ccSLukas Czerner 2950*6e47a3ccSLukas Czerner return ret; 2951*6e47a3ccSLukas Czerner } 2952*6e47a3ccSLukas Czerner 2953*6e47a3ccSLukas Czerner 2954da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 29554c94bff9SLukas Czerner { 2956ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2957*6e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 29584c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 2959*6e47a3ccSLukas Czerner 2960*6e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 2961*6e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 2962*6e47a3ccSLukas Czerner 296333458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 2964*6e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 2965*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2966ac27a0ecSDave Kleikamp 2967*6e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 2968*6e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2969ac27a0ecSDave Kleikamp 2970*6e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 2971*6e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2972da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2973b31e1552SEric Sandeen "format mixing"); 2974da812f61SLukas Czerner return -EINVAL; 2975ac27a0ecSDave Kleikamp } 2976ac27a0ecSDave Kleikamp } 2977ac27a0ecSDave Kleikamp #endif 2978*6e47a3ccSLukas Czerner return 1; 2979ac27a0ecSDave Kleikamp } 2980ac27a0ecSDave Kleikamp 29812adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 29822adf6da8STheodore Ts'o struct super_block *sb) 29832adf6da8STheodore Ts'o { 29842adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 29852adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 298633458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 29872adf6da8STheodore Ts'o 29882adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 29892adf6da8STheodore Ts'o char *fmtname = ""; 29902adf6da8STheodore Ts'o 29912adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 29922adf6da8STheodore Ts'o case QFMT_VFS_OLD: 29932adf6da8STheodore Ts'o fmtname = "vfsold"; 29942adf6da8STheodore Ts'o break; 29952adf6da8STheodore Ts'o case QFMT_VFS_V0: 29962adf6da8STheodore Ts'o fmtname = "vfsv0"; 29972adf6da8STheodore Ts'o break; 29982adf6da8STheodore Ts'o case QFMT_VFS_V1: 29992adf6da8STheodore Ts'o fmtname = "vfsv1"; 30002adf6da8STheodore Ts'o break; 30012adf6da8STheodore Ts'o } 30022adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 30032adf6da8STheodore Ts'o } 30042adf6da8STheodore Ts'o 300533458eabSTheodore Ts'o rcu_read_lock(); 300633458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 300733458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 300833458eabSTheodore Ts'o if (usr_qf_name) 300933458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 301033458eabSTheodore Ts'o if (grp_qf_name) 301133458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 301233458eabSTheodore Ts'o rcu_read_unlock(); 30132adf6da8STheodore Ts'o #endif 30142adf6da8STheodore Ts'o } 30152adf6da8STheodore Ts'o 30165a916be1STheodore Ts'o static const char *token2str(int token) 30175a916be1STheodore Ts'o { 301850df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 30195a916be1STheodore Ts'o 30205a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 30215a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 30225a916be1STheodore Ts'o break; 30235a916be1STheodore Ts'o return t->pattern; 30245a916be1STheodore Ts'o } 30255a916be1STheodore Ts'o 30262adf6da8STheodore Ts'o /* 30272adf6da8STheodore Ts'o * Show an option if 30282adf6da8STheodore Ts'o * - it's set to a non-default value OR 30292adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 30302adf6da8STheodore Ts'o */ 303166acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 303266acdcf4STheodore Ts'o int nodefs) 30332adf6da8STheodore Ts'o { 30342adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 30352adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 303668afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 30375a916be1STheodore Ts'o const struct mount_opts *m; 303866acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 30392adf6da8STheodore Ts'o 304066acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 304166acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 30422adf6da8STheodore Ts'o 30432adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 30445a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 30455a916be1STheodore Ts'o 30465a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 30475a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 30485a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 30499cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 30505a916be1STheodore Ts'o continue; 305168afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 30525a916be1STheodore Ts'o continue; /* skip if same as the default */ 30535a916be1STheodore Ts'o if ((want_set && 30545a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 30555a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 30565a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 30575a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 30585a916be1STheodore Ts'o } 30595a916be1STheodore Ts'o 306008cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 30615a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 306208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 306308cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 306408cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 30655a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 306608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 306708cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 306866acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 30695a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 30705a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 30712adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 30725a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 30732adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 30745a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 307566acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 30765a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 307766acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 30785a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 307966acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 30805a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 3081357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 30825a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 308366acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 30845a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 308568afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 308668afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 30872adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30885a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 30892adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30905a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 30912adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 30925a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 30935a916be1STheodore Ts'o } 309466acdcf4STheodore Ts'o if (nodefs || 309566acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 30965a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 30972adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 30982adf6da8STheodore Ts'o 3099ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 310066acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 31015a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3102df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3103df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 31047915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 31057915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3106ed318a6cSEric Biggers 3107ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 31082adf6da8STheodore Ts'o 31094f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 31104f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 31114f74d15fSEric Biggers 31129cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 31139cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 31149cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 31159cb20f94SIra Weiny else 31169cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 31179cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 31189cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 31199cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 31209cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 31219cb20f94SIra Weiny } 31222adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 31232adf6da8STheodore Ts'o return 0; 31242adf6da8STheodore Ts'o } 31252adf6da8STheodore Ts'o 312666acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 312766acdcf4STheodore Ts'o { 312866acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 312966acdcf4STheodore Ts'o } 313066acdcf4STheodore Ts'o 3131ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 313266acdcf4STheodore Ts'o { 313366acdcf4STheodore Ts'o struct super_block *sb = seq->private; 313466acdcf4STheodore Ts'o int rc; 313566acdcf4STheodore Ts'o 3136bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 313766acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 313866acdcf4STheodore Ts'o seq_puts(seq, "\n"); 313966acdcf4STheodore Ts'o return rc; 314066acdcf4STheodore Ts'o } 314166acdcf4STheodore Ts'o 3142617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3143ac27a0ecSDave Kleikamp int read_only) 3144ac27a0ecSDave Kleikamp { 3145617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3146c89128a0SJaegeuk Kim int err = 0; 3147ac27a0ecSDave Kleikamp 3148617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3149b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3150b31e1552SEric Sandeen "forcing read-only mode"); 3151c89128a0SJaegeuk Kim err = -EROFS; 31525adaccacSyangerkun goto done; 3153ac27a0ecSDave Kleikamp } 3154ac27a0ecSDave Kleikamp if (read_only) 3155281b5995STheodore Ts'o goto done; 3156617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3157b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3158b31e1552SEric Sandeen "running e2fsck is recommended"); 3159c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3160b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3161b31e1552SEric Sandeen "warning: mounting fs with errors, " 3162b31e1552SEric Sandeen "running e2fsck is recommended"); 3163ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3164ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3165ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3166b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3167b31e1552SEric Sandeen "warning: maximal mount count reached, " 3168b31e1552SEric Sandeen "running e2fsck is recommended"); 3169ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 31706a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 31716a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3172b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3173b31e1552SEric Sandeen "warning: checktime reached, " 3174b31e1552SEric Sandeen "running e2fsck is recommended"); 31750390131bSFrank Mayhar if (!sbi->s_journal) 3176216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3177ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3178617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3179e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 31806a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 318102f310fcSJan Kara if (sbi->s_journal) { 3182e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 318302f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 318402f310fcSJan Kara ext4_set_feature_orphan_present(sb); 318502f310fcSJan Kara } 3186ac27a0ecSDave Kleikamp 31874392fbc4SJan Kara err = ext4_commit_super(sb); 3188281b5995STheodore Ts'o done: 3189ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3190a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3191a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3192ac27a0ecSDave Kleikamp sb->s_blocksize, 3193ac27a0ecSDave Kleikamp sbi->s_groups_count, 3194617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3195617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3196a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3197ac27a0ecSDave Kleikamp 31987abc52c2SDan Magenheimer cleancache_init_fs(sb); 3199c89128a0SJaegeuk Kim return err; 3200ac27a0ecSDave Kleikamp } 3201ac27a0ecSDave Kleikamp 3202117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3203117fff10STheodore Ts'o { 3204117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 32057c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 320637b0b6b8SDan Carpenter int size, i, j; 3207117fff10STheodore Ts'o 3208117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3209117fff10STheodore Ts'o return 0; 3210117fff10STheodore Ts'o 3211117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3212117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3213117fff10STheodore Ts'o return 0; 3214117fff10STheodore Ts'o 32157c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 32167c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3217117fff10STheodore Ts'o if (!new_groups) { 32187c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 32197c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3220117fff10STheodore Ts'o return -ENOMEM; 3221117fff10STheodore Ts'o } 32227c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 32237c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 32247c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 32257c990728SSuraj Jitindar Singh GFP_KERNEL); 32267c990728SSuraj Jitindar Singh if (!new_groups[i]) { 322737b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 322837b0b6b8SDan Carpenter kvfree(new_groups[j]); 32297c990728SSuraj Jitindar Singh kvfree(new_groups); 32307c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 32317c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 32327c990728SSuraj Jitindar Singh return -ENOMEM; 3233117fff10STheodore Ts'o } 32347c990728SSuraj Jitindar Singh } 32357c990728SSuraj Jitindar Singh rcu_read_lock(); 32367c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 32377c990728SSuraj Jitindar Singh if (old_groups) 32387c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 32397c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 32407c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 32417c990728SSuraj Jitindar Singh rcu_read_unlock(); 32427c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 32437c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 32447c990728SSuraj Jitindar Singh if (old_groups) 32457c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3246117fff10STheodore Ts'o return 0; 3247117fff10STheodore Ts'o } 3248117fff10STheodore Ts'o 3249772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3250772cb7c8SJose R. Santos { 3251772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3252772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 32537c990728SSuraj Jitindar Singh struct flex_groups *fg; 3254772cb7c8SJose R. Santos ext4_group_t flex_group; 3255117fff10STheodore Ts'o int i, err; 3256772cb7c8SJose R. Santos 3257503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3258d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3259772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3260772cb7c8SJose R. Santos return 1; 3261772cb7c8SJose R. Santos } 3262772cb7c8SJose R. Santos 3263117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3264117fff10STheodore Ts'o if (err) 3265772cb7c8SJose R. Santos goto failed; 3266772cb7c8SJose R. Santos 3267772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 326888b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3269772cb7c8SJose R. Santos 3270772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 32717c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 32727c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 327390ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 32747c990728SSuraj Jitindar Singh &fg->free_clusters); 32757c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3276772cb7c8SJose R. Santos } 3277772cb7c8SJose R. Santos 3278772cb7c8SJose R. Santos return 1; 3279772cb7c8SJose R. Santos failed: 3280772cb7c8SJose R. Santos return 0; 3281772cb7c8SJose R. Santos } 3282772cb7c8SJose R. Santos 3283e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3284717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3285717d50e4SAndreas Dilger { 3286b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3287717d50e4SAndreas Dilger __u16 crc = 0; 3288717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3289e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3290717d50e4SAndreas Dilger 32919aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3292feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3293feb0ab32SDarrick J. Wong __u32 csum32; 3294b47820edSDaeho Jeong __u16 dummy_csum = 0; 3295feb0ab32SDarrick J. Wong 3296feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3297feb0ab32SDarrick J. Wong sizeof(le_group)); 3298b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3299b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3300b47820edSDaeho Jeong sizeof(dummy_csum)); 3301b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3302b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3303b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3304b47820edSDaeho Jeong sbi->s_desc_size - offset); 3305feb0ab32SDarrick J. Wong 3306feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3307feb0ab32SDarrick J. Wong goto out; 3308feb0ab32SDarrick J. Wong } 3309feb0ab32SDarrick J. Wong 3310feb0ab32SDarrick J. Wong /* old crc16 code */ 3311e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3312813d32f9SDarrick J. Wong return 0; 3313813d32f9SDarrick J. Wong 3314717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3315717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3316717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3317717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3318717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3319e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3320717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3321717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3322717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3323717d50e4SAndreas Dilger offset); 3324717d50e4SAndreas Dilger 3325feb0ab32SDarrick J. Wong out: 3326717d50e4SAndreas Dilger return cpu_to_le16(crc); 3327717d50e4SAndreas Dilger } 3328717d50e4SAndreas Dilger 3329feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3330717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3331717d50e4SAndreas Dilger { 3332feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3333e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3334717d50e4SAndreas Dilger return 0; 3335717d50e4SAndreas Dilger 3336717d50e4SAndreas Dilger return 1; 3337717d50e4SAndreas Dilger } 3338717d50e4SAndreas Dilger 3339feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3340feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3341feb0ab32SDarrick J. Wong { 3342feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3343feb0ab32SDarrick J. Wong return; 3344e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3345feb0ab32SDarrick J. Wong } 3346feb0ab32SDarrick J. Wong 3347ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3348bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3349829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3350bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3351ac27a0ecSDave Kleikamp { 3352617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3353617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3354617ba13bSMingming Cao ext4_fsblk_t last_block; 335544de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3356bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3357bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3358bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3359ce421581SJose R. Santos int flexbg_flag = 0; 3360bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3361ac27a0ecSDave Kleikamp 3362e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3363ce421581SJose R. Santos flexbg_flag = 1; 3364ce421581SJose R. Santos 3365617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3366ac27a0ecSDave Kleikamp 3367197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3368197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3369197cd65aSAkinobu Mita 3370ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3371bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3372ac27a0ecSDave Kleikamp else 3373ac27a0ecSDave Kleikamp last_block = first_block + 3374617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3375ac27a0ecSDave Kleikamp 3376bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3377bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3378bfff6873SLukas Czerner grp = i; 3379bfff6873SLukas Czerner 33808fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3381829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3382829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3383829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3384829fa70dSTheodore Ts'o "superblock", i); 338518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 338618db4b4eSTheodore Ts'o return 0; 3387829fa70dSTheodore Ts'o } 338877260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 338977260807STheodore Ts'o block_bitmap <= last_bg_block) { 339077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 339177260807STheodore Ts'o "Block bitmap for group %u overlaps " 339277260807STheodore Ts'o "block group descriptors", i); 339377260807STheodore Ts'o if (!sb_rdonly(sb)) 339477260807STheodore Ts'o return 0; 339577260807STheodore Ts'o } 33962b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3397b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3398a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3399b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3400ac27a0ecSDave Kleikamp return 0; 3401ac27a0ecSDave Kleikamp } 34028fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3403829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3404829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3405829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3406829fa70dSTheodore Ts'o "superblock", i); 340718db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 340818db4b4eSTheodore Ts'o return 0; 3409829fa70dSTheodore Ts'o } 341077260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 341177260807STheodore Ts'o inode_bitmap <= last_bg_block) { 341277260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 341377260807STheodore Ts'o "Inode bitmap for group %u overlaps " 341477260807STheodore Ts'o "block group descriptors", i); 341577260807STheodore Ts'o if (!sb_rdonly(sb)) 341677260807STheodore Ts'o return 0; 341777260807STheodore Ts'o } 34182b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3419b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3420a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3421b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3422ac27a0ecSDave Kleikamp return 0; 3423ac27a0ecSDave Kleikamp } 34248fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3425829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3426829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3427829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3428829fa70dSTheodore Ts'o "superblock", i); 342918db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 343018db4b4eSTheodore Ts'o return 0; 3431829fa70dSTheodore Ts'o } 343277260807STheodore Ts'o if (inode_table >= sb_block + 1 && 343377260807STheodore Ts'o inode_table <= last_bg_block) { 343477260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 343577260807STheodore Ts'o "Inode table for group %u overlaps " 343677260807STheodore Ts'o "block group descriptors", i); 343777260807STheodore Ts'o if (!sb_rdonly(sb)) 343877260807STheodore Ts'o return 0; 343977260807STheodore Ts'o } 3440bd81d8eeSLaurent Vivier if (inode_table < first_block || 34412b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3442b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3443a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3444b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3445ac27a0ecSDave Kleikamp return 0; 3446ac27a0ecSDave Kleikamp } 3447955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3448feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3449b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3450b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3451e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3452fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3453bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3454955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3455717d50e4SAndreas Dilger return 0; 3456717d50e4SAndreas Dilger } 34577ee1ec4cSLi Zefan } 3458955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3459ce421581SJose R. Santos if (!flexbg_flag) 3460617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3461ac27a0ecSDave Kleikamp } 3462bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3463bfff6873SLukas Czerner *first_not_zeroed = grp; 3464ac27a0ecSDave Kleikamp return 1; 3465ac27a0ecSDave Kleikamp } 3466ac27a0ecSDave Kleikamp 3467cd2291a4SEric Sandeen /* 3468cd2291a4SEric Sandeen * Maximal extent format file size. 3469cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3470cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3471cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3472cd2291a4SEric Sandeen * so that won't be a limiting factor. 3473cd2291a4SEric Sandeen * 3474f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3475f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3476f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3477f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3478f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3479f17722f9SLukas Czerner * 3480cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3481cd2291a4SEric Sandeen */ 3482f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3483cd2291a4SEric Sandeen { 3484cd2291a4SEric Sandeen loff_t res; 3485cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3486cd2291a4SEric Sandeen 348772deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 348872deb455SChristoph Hellwig 348972deb455SChristoph Hellwig if (!has_huge_files) { 3490cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3491cd2291a4SEric Sandeen 3492cd2291a4SEric Sandeen /* total blocks in file system block size */ 3493cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3494cd2291a4SEric Sandeen upper_limit <<= blkbits; 3495cd2291a4SEric Sandeen } 3496cd2291a4SEric Sandeen 3497f17722f9SLukas Czerner /* 3498f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3499f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3500f17722f9SLukas Czerner * size 3501f17722f9SLukas Czerner */ 3502f17722f9SLukas Czerner res = (1LL << 32) - 1; 3503cd2291a4SEric Sandeen res <<= blkbits; 3504cd2291a4SEric Sandeen 3505cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3506cd2291a4SEric Sandeen if (res > upper_limit) 3507cd2291a4SEric Sandeen res = upper_limit; 3508cd2291a4SEric Sandeen 3509cd2291a4SEric Sandeen return res; 3510cd2291a4SEric Sandeen } 3511ac27a0ecSDave Kleikamp 3512ac27a0ecSDave Kleikamp /* 3513cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 35140fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 35150fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3516ac27a0ecSDave Kleikamp */ 3517f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3518ac27a0ecSDave Kleikamp { 351975ca6ad4SRitesh Harjani unsigned long long upper_limit, res = EXT4_NDIR_BLOCKS; 35200fc1b451SAneesh Kumar K.V int meta_blocks; 352175ca6ad4SRitesh Harjani 352275ca6ad4SRitesh Harjani /* 352375ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 35240b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 35250b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 35260b8e58a1SAndreas Dilger * 35270b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 35280b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 35290fc1b451SAneesh Kumar K.V */ 353072deb455SChristoph Hellwig if (!has_huge_files) { 35310fc1b451SAneesh Kumar K.V /* 353272deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 353372deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 353472deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 35350fc1b451SAneesh Kumar K.V */ 35360fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 35370fc1b451SAneesh Kumar K.V 35380fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 35390fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 35400fc1b451SAneesh Kumar K.V 35410fc1b451SAneesh Kumar K.V } else { 35428180a562SAneesh Kumar K.V /* 35438180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 35448180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 35458180a562SAneesh Kumar K.V * represent total number of blocks in 35468180a562SAneesh Kumar K.V * file system block size 35478180a562SAneesh Kumar K.V */ 35480fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 35490fc1b451SAneesh Kumar K.V 35500fc1b451SAneesh Kumar K.V } 35510fc1b451SAneesh Kumar K.V 35520fc1b451SAneesh Kumar K.V /* indirect blocks */ 35530fc1b451SAneesh Kumar K.V meta_blocks = 1; 35540fc1b451SAneesh Kumar K.V /* double indirect blocks */ 35550fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 35560fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 35570fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 35580fc1b451SAneesh Kumar K.V 35590fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 35600fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3561ac27a0ecSDave Kleikamp 3562ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3563ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3564ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3565ac27a0ecSDave Kleikamp res <<= bits; 3566ac27a0ecSDave Kleikamp if (res > upper_limit) 3567ac27a0ecSDave Kleikamp res = upper_limit; 35680fc1b451SAneesh Kumar K.V 35690fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 35700fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 35710fc1b451SAneesh Kumar K.V 357275ca6ad4SRitesh Harjani return (loff_t)res; 3573ac27a0ecSDave Kleikamp } 3574ac27a0ecSDave Kleikamp 3575617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 357670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3577ac27a0ecSDave Kleikamp { 3578617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3579fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3580ac27a0ecSDave Kleikamp int has_super = 0; 3581ac27a0ecSDave Kleikamp 3582ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3583ac27a0ecSDave Kleikamp 3584e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 358570bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3586ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3587617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3588ac27a0ecSDave Kleikamp has_super = 1; 35890b8e58a1SAndreas Dilger 3590bd63f6b0SDarrick J. Wong /* 3591bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3592bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3593bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3594bd63f6b0SDarrick J. Wong * compensate. 3595bd63f6b0SDarrick J. Wong */ 3596bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 359749598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3598bd63f6b0SDarrick J. Wong has_super++; 3599bd63f6b0SDarrick J. Wong 3600617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3601ac27a0ecSDave Kleikamp } 3602ac27a0ecSDave Kleikamp 3603c9de560dSAlex Tomas /** 3604c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3605c9de560dSAlex Tomas * @sbi: In memory super block info 3606c9de560dSAlex Tomas * 3607c9de560dSAlex Tomas * If we have specified it via mount option, then 3608c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3609c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3610c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3611c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3612c9de560dSAlex Tomas * 3613c9de560dSAlex Tomas */ 3614c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3615c9de560dSAlex Tomas { 3616c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3617c9de560dSAlex Tomas unsigned long stripe_width = 3618c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 36193eb08658SDan Ehrenberg int ret; 3620c9de560dSAlex Tomas 3621c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 36223eb08658SDan Ehrenberg ret = sbi->s_stripe; 36235469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 36243eb08658SDan Ehrenberg ret = stripe_width; 36255469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 36263eb08658SDan Ehrenberg ret = stride; 36273eb08658SDan Ehrenberg else 36283eb08658SDan Ehrenberg ret = 0; 3629c9de560dSAlex Tomas 36303eb08658SDan Ehrenberg /* 36313eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 36323eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 36333eb08658SDan Ehrenberg */ 36343eb08658SDan Ehrenberg if (ret <= 1) 36353eb08658SDan Ehrenberg ret = 0; 3636c9de560dSAlex Tomas 36373eb08658SDan Ehrenberg return ret; 3638c9de560dSAlex Tomas } 3639ac27a0ecSDave Kleikamp 3640a13fb1a4SEric Sandeen /* 3641a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3642a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3643a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3644a13fb1a4SEric Sandeen * 0 if it cannot be. 3645a13fb1a4SEric Sandeen */ 364625c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3647a13fb1a4SEric Sandeen { 3648e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3649a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3650a13fb1a4SEric Sandeen "Couldn't mount because of " 3651a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3652a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3653a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3654a13fb1a4SEric Sandeen return 0; 3655a13fb1a4SEric Sandeen } 3656a13fb1a4SEric Sandeen 3657c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3658c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3659c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3660c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3661c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3662c83ad55eSGabriel Krisman Bertazi return 0; 3663c83ad55eSGabriel Krisman Bertazi } 3664c83ad55eSGabriel Krisman Bertazi #endif 3665c83ad55eSGabriel Krisman Bertazi 3666a13fb1a4SEric Sandeen if (readonly) 3667a13fb1a4SEric Sandeen return 1; 3668a13fb1a4SEric Sandeen 3669e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 36702cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 36711751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 36722cb5cc8bSDarrick J. Wong return 1; 36732cb5cc8bSDarrick J. Wong } 36742cb5cc8bSDarrick J. Wong 3675a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3676e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3677a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3678a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3679a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3680a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3681a13fb1a4SEric Sandeen return 0; 3682a13fb1a4SEric Sandeen } 3683e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3684bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3685bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3686bab08ab9STheodore Ts'o "extents feature\n"); 3687bab08ab9STheodore Ts'o return 0; 3688bab08ab9STheodore Ts'o } 36897c319d32SAditya Kali 36909db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3691d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3692d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 36937c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3694d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3695689c958cSLi Xi return 0; 3696689c958cSLi Xi } 36977c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3698a13fb1a4SEric Sandeen return 1; 3699a13fb1a4SEric Sandeen } 3700a13fb1a4SEric Sandeen 370166e61a9eSTheodore Ts'o /* 370266e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 370366e61a9eSTheodore Ts'o * on the file system 370466e61a9eSTheodore Ts'o */ 3705235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 370666e61a9eSTheodore Ts'o { 3707235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3708235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3709235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 371066e61a9eSTheodore Ts'o 371166e61a9eSTheodore Ts'o if (es->s_error_count) 3712ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3713ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 371466e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 371566e61a9eSTheodore Ts'o if (es->s_first_error_time) { 37166a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 37176a0678a7SArnd Bergmann sb->s_id, 37186a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 371966e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 372066e61a9eSTheodore Ts'o es->s_first_error_func, 372166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 372266e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3723651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 372466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 372566e61a9eSTheodore Ts'o if (es->s_first_error_block) 3726651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 372766e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3728651e1c3bSJoe Perches printk(KERN_CONT "\n"); 372966e61a9eSTheodore Ts'o } 373066e61a9eSTheodore Ts'o if (es->s_last_error_time) { 37316a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 37326a0678a7SArnd Bergmann sb->s_id, 37336a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 373466e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 373566e61a9eSTheodore Ts'o es->s_last_error_func, 373666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 373766e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3738651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 373966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 374066e61a9eSTheodore Ts'o if (es->s_last_error_block) 3741651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 374266e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3743651e1c3bSJoe Perches printk(KERN_CONT "\n"); 374466e61a9eSTheodore Ts'o } 374566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 374666e61a9eSTheodore Ts'o } 374766e61a9eSTheodore Ts'o 3748bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3749bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3750bfff6873SLukas Czerner { 3751bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 37523d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 37533d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 37543d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 37553d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3756bfff6873SLukas Czerner int ret = 0; 375739fec688SShaoying Xu u64 start_time; 3758bfff6873SLukas Czerner 37593d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 37603d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 37613d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 37623d392b26STheodore Ts'o if (prefetch_ios) 37633d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 37643d392b26STheodore Ts'o prefetch_ios); 37653d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 37663d392b26STheodore Ts'o prefetch_ios); 37673d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 37683d392b26STheodore Ts'o ret = 1; 37693d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 37703d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 37713d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 37723d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 37733d392b26STheodore Ts'o ret = 0; 37743d392b26STheodore Ts'o } 37753d392b26STheodore Ts'o } 37763d392b26STheodore Ts'o return ret; 37773d392b26STheodore Ts'o } 3778bfff6873SLukas Czerner 37793d392b26STheodore Ts'o for (; group < ngroups; group++) { 3780bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3781bfff6873SLukas Czerner if (!gdp) { 3782bfff6873SLukas Czerner ret = 1; 3783bfff6873SLukas Czerner break; 3784bfff6873SLukas Czerner } 3785bfff6873SLukas Czerner 3786bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3787bfff6873SLukas Czerner break; 3788bfff6873SLukas Czerner } 3789bfff6873SLukas Czerner 37907f511862STheodore Ts'o if (group >= ngroups) 3791bfff6873SLukas Czerner ret = 1; 3792bfff6873SLukas Czerner 3793bfff6873SLukas Czerner if (!ret) { 379439fec688SShaoying Xu start_time = ktime_get_real_ns(); 3795bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3796bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37973d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3798bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 379939fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 380039fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3801bfff6873SLukas Czerner } 3802bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3803bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3804bfff6873SLukas Czerner } 3805bfff6873SLukas Czerner return ret; 3806bfff6873SLukas Czerner } 3807bfff6873SLukas Czerner 3808bfff6873SLukas Czerner /* 3809bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 38104ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3811bfff6873SLukas Czerner */ 3812bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3813bfff6873SLukas Czerner { 3814bfff6873SLukas Czerner if (!elr) 3815bfff6873SLukas Czerner return; 3816bfff6873SLukas Czerner 3817bfff6873SLukas Czerner list_del(&elr->lr_request); 38183d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3819bfff6873SLukas Czerner kfree(elr); 3820bfff6873SLukas Czerner } 3821bfff6873SLukas Czerner 3822bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3823bfff6873SLukas Czerner { 38241bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 38251bb933fbSLukas Czerner if (!ext4_li_info) { 38261bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3827bfff6873SLukas Czerner return; 38281bb933fbSLukas Czerner } 3829bfff6873SLukas Czerner 3830bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 38311bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3832bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 38331bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3834bfff6873SLukas Czerner } 3835bfff6873SLukas Czerner 38368f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 38378f1f7453SEric Sandeen 3838bfff6873SLukas Czerner /* 3839bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3840bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3841bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3842bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3843bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3844bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3845bfff6873SLukas Czerner * next waking time and put itself into sleep. 3846bfff6873SLukas Czerner */ 3847bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3848bfff6873SLukas Czerner { 3849bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3850bfff6873SLukas Czerner struct list_head *pos, *n; 3851bfff6873SLukas Czerner struct ext4_li_request *elr; 38524ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3853bfff6873SLukas Czerner 3854bfff6873SLukas Czerner BUG_ON(NULL == eli); 3855bfff6873SLukas Czerner 3856bfff6873SLukas Czerner cont_thread: 3857bfff6873SLukas Czerner while (true) { 3858bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3859bfff6873SLukas Czerner 3860bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3861bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3862bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3863bfff6873SLukas Czerner goto exit_thread; 3864bfff6873SLukas Czerner } 3865bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3866e22834f0SDmitry Monakhov int err = 0; 3867e22834f0SDmitry Monakhov int progress = 0; 3868bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3869bfff6873SLukas Czerner lr_request); 3870bfff6873SLukas Czerner 3871e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3872e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3873e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3874e22834f0SDmitry Monakhov continue; 3875e22834f0SDmitry Monakhov } 3876e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3877e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3878e22834f0SDmitry Monakhov progress = 1; 3879e22834f0SDmitry Monakhov /* 3880e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3881e22834f0SDmitry Monakhov * be removed from the list, it is 3882e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3883e22834f0SDmitry Monakhov */ 3884e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3885e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3886e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3887e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3888e22834f0SDmitry Monakhov n = pos->next; 3889e22834f0SDmitry Monakhov } 3890e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3891e22834f0SDmitry Monakhov } 3892b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3893e22834f0SDmitry Monakhov if (err) { 3894bfff6873SLukas Czerner ext4_remove_li_request(elr); 3895bfff6873SLukas Czerner continue; 3896bfff6873SLukas Czerner } 3897e22834f0SDmitry Monakhov if (!progress) { 3898e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3899e22834f0SDmitry Monakhov (prandom_u32() 3900e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3901b2c78cd0STheodore Ts'o } 3902bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3903bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3904bfff6873SLukas Czerner } 3905bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3906bfff6873SLukas Czerner 3907a0acae0eSTejun Heo try_to_freeze(); 3908bfff6873SLukas Czerner 39094ed5c033SLukas Czerner cur = jiffies; 39104ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3911f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3912bfff6873SLukas Czerner cond_resched(); 3913bfff6873SLukas Czerner continue; 3914bfff6873SLukas Czerner } 3915bfff6873SLukas Czerner 39164ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 39174ed5c033SLukas Czerner 39188f1f7453SEric Sandeen if (kthread_should_stop()) { 39198f1f7453SEric Sandeen ext4_clear_request_list(); 39208f1f7453SEric Sandeen goto exit_thread; 39218f1f7453SEric Sandeen } 3922bfff6873SLukas Czerner } 3923bfff6873SLukas Czerner 3924bfff6873SLukas Czerner exit_thread: 3925bfff6873SLukas Czerner /* 3926bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3927bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3928bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3929bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3930bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3931bfff6873SLukas Czerner * new one. 3932bfff6873SLukas Czerner */ 3933bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3934bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3935bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3936bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3937bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3938bfff6873SLukas Czerner goto cont_thread; 3939bfff6873SLukas Czerner } 3940bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3941bfff6873SLukas Czerner kfree(ext4_li_info); 3942bfff6873SLukas Czerner ext4_li_info = NULL; 3943bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3944bfff6873SLukas Czerner 3945bfff6873SLukas Czerner return 0; 3946bfff6873SLukas Czerner } 3947bfff6873SLukas Czerner 3948bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3949bfff6873SLukas Czerner { 3950bfff6873SLukas Czerner struct list_head *pos, *n; 3951bfff6873SLukas Czerner struct ext4_li_request *elr; 3952bfff6873SLukas Czerner 3953bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3954bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3955bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3956bfff6873SLukas Czerner lr_request); 3957bfff6873SLukas Czerner ext4_remove_li_request(elr); 3958bfff6873SLukas Czerner } 3959bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3960bfff6873SLukas Czerner } 3961bfff6873SLukas Czerner 3962bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3963bfff6873SLukas Czerner { 39648f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 39658f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 39668f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 39678f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3968bfff6873SLukas Czerner ext4_clear_request_list(); 3969bfff6873SLukas Czerner kfree(ext4_li_info); 3970bfff6873SLukas Czerner ext4_li_info = NULL; 397192b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3972bfff6873SLukas Czerner "initialization thread\n", 3973bfff6873SLukas Czerner err); 3974bfff6873SLukas Czerner return err; 3975bfff6873SLukas Czerner } 3976bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3977bfff6873SLukas Czerner return 0; 3978bfff6873SLukas Czerner } 3979bfff6873SLukas Czerner 3980bfff6873SLukas Czerner /* 3981bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3982bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3983bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3984bfff6873SLukas Czerner * groups and return total number of groups. 3985bfff6873SLukas Czerner */ 3986bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3987bfff6873SLukas Czerner { 3988bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3989bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3990bfff6873SLukas Czerner 39918844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 39928844618dSTheodore Ts'o return ngroups; 39938844618dSTheodore Ts'o 3994bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3995bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3996bfff6873SLukas Czerner if (!gdp) 3997bfff6873SLukas Czerner continue; 3998bfff6873SLukas Czerner 399950122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 4000bfff6873SLukas Czerner break; 4001bfff6873SLukas Czerner } 4002bfff6873SLukas Czerner 4003bfff6873SLukas Czerner return group; 4004bfff6873SLukas Czerner } 4005bfff6873SLukas Czerner 4006bfff6873SLukas Czerner static int ext4_li_info_new(void) 4007bfff6873SLukas Czerner { 4008bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 4009bfff6873SLukas Czerner 4010bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 4011bfff6873SLukas Czerner if (!eli) 4012bfff6873SLukas Czerner return -ENOMEM; 4013bfff6873SLukas Czerner 4014bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 4015bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 4016bfff6873SLukas Czerner 4017bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 4018bfff6873SLukas Czerner 4019bfff6873SLukas Czerner ext4_li_info = eli; 4020bfff6873SLukas Czerner 4021bfff6873SLukas Czerner return 0; 4022bfff6873SLukas Czerner } 4023bfff6873SLukas Czerner 4024bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 4025bfff6873SLukas Czerner ext4_group_t start) 4026bfff6873SLukas Czerner { 4027bfff6873SLukas Czerner struct ext4_li_request *elr; 4028bfff6873SLukas Czerner 4029bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 4030bfff6873SLukas Czerner if (!elr) 4031bfff6873SLukas Czerner return NULL; 4032bfff6873SLukas Czerner 4033bfff6873SLukas Czerner elr->lr_super = sb; 40343d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 403521175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 40363d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 4037bfff6873SLukas Czerner elr->lr_next_group = start; 403821175ca4SHarshad Shirwadkar } else { 403921175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 40403d392b26STheodore Ts'o } 4041bfff6873SLukas Czerner 4042bfff6873SLukas Czerner /* 4043bfff6873SLukas Czerner * Randomize first schedule time of the request to 4044bfff6873SLukas Czerner * spread the inode table initialization requests 4045bfff6873SLukas Czerner * better. 4046bfff6873SLukas Czerner */ 4047dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 4048dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 4049bfff6873SLukas Czerner return elr; 4050bfff6873SLukas Czerner } 4051bfff6873SLukas Czerner 40527f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 4053bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 4054bfff6873SLukas Czerner { 4055bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 40567f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 405749598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 40586c5a6cb9SAndrew Morton int ret = 0; 4059bfff6873SLukas Czerner 40607f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 406151ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 406251ce6511SLukas Czerner /* 406351ce6511SLukas Czerner * Reset timeout so it can be computed again, because 406451ce6511SLukas Czerner * s_li_wait_mult might have changed. 406551ce6511SLukas Czerner */ 406651ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 40677f511862STheodore Ts'o goto out; 406851ce6511SLukas Czerner } 4069bfff6873SLukas Czerner 407021175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 40713d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 40723d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 40737f511862STheodore Ts'o goto out; 4074bfff6873SLukas Czerner 4075bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 40767f511862STheodore Ts'o if (!elr) { 40777f511862STheodore Ts'o ret = -ENOMEM; 40787f511862STheodore Ts'o goto out; 40797f511862STheodore Ts'o } 4080bfff6873SLukas Czerner 4081bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4082bfff6873SLukas Czerner ret = ext4_li_info_new(); 4083bfff6873SLukas Czerner if (ret) 4084bfff6873SLukas Czerner goto out; 4085bfff6873SLukas Czerner } 4086bfff6873SLukas Czerner 4087bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4088bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4089bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4090bfff6873SLukas Czerner 4091bfff6873SLukas Czerner sbi->s_li_request = elr; 409246e4690bSTao Ma /* 409346e4690bSTao Ma * set elr to NULL here since it has been inserted to 409446e4690bSTao Ma * the request_list and the removal and free of it is 409546e4690bSTao Ma * handled by ext4_clear_request_list from now on. 409646e4690bSTao Ma */ 409746e4690bSTao Ma elr = NULL; 4098bfff6873SLukas Czerner 4099bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4100bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4101bfff6873SLukas Czerner if (ret) 4102bfff6873SLukas Czerner goto out; 4103bfff6873SLukas Czerner } 4104bfff6873SLukas Czerner out: 4105bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4106beed5ecbSNicolas Kaiser if (ret) 4107bfff6873SLukas Czerner kfree(elr); 4108bfff6873SLukas Czerner return ret; 4109bfff6873SLukas Czerner } 4110bfff6873SLukas Czerner 4111bfff6873SLukas Czerner /* 4112bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4113bfff6873SLukas Czerner * module unload. 4114bfff6873SLukas Czerner */ 4115bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4116bfff6873SLukas Czerner { 4117bfff6873SLukas Czerner /* 4118bfff6873SLukas Czerner * If thread exited earlier 4119bfff6873SLukas Czerner * there's nothing to be done. 4120bfff6873SLukas Czerner */ 41218f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4122bfff6873SLukas Czerner return; 4123bfff6873SLukas Czerner 41248f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4125bfff6873SLukas Czerner } 4126bfff6873SLukas Czerner 412725ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 412825ed6e8aSDarrick J. Wong { 412925ed6e8aSDarrick J. Wong int ret = 1; 413025ed6e8aSDarrick J. Wong int compat, incompat; 413125ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 413225ed6e8aSDarrick J. Wong 41339aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4134db9ee220SDarrick J. Wong /* journal checksum v3 */ 413525ed6e8aSDarrick J. Wong compat = 0; 4136db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 413725ed6e8aSDarrick J. Wong } else { 413825ed6e8aSDarrick J. Wong /* journal checksum v1 */ 413925ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 414025ed6e8aSDarrick J. Wong incompat = 0; 414125ed6e8aSDarrick J. Wong } 414225ed6e8aSDarrick J. Wong 4143feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4144feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4145feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4146feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 414725ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 414825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 414925ed6e8aSDarrick J. Wong compat, 0, 415025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 415125ed6e8aSDarrick J. Wong incompat); 415225ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 415325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 415425ed6e8aSDarrick J. Wong compat, 0, 415525ed6e8aSDarrick J. Wong incompat); 415625ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 415725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 415825ed6e8aSDarrick J. Wong } else { 4159feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4160feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 416125ed6e8aSDarrick J. Wong } 416225ed6e8aSDarrick J. Wong 416325ed6e8aSDarrick J. Wong return ret; 416425ed6e8aSDarrick J. Wong } 416525ed6e8aSDarrick J. Wong 4166952fc18eSTheodore Ts'o /* 4167952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4168952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4169952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4170952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4171952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4172952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4173952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4174952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4175952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4176952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4177952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4178952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4179952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4180952fc18eSTheodore Ts'o */ 4181952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4182952fc18eSTheodore Ts'o char *buf) 4183952fc18eSTheodore Ts'o { 4184952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4185952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4186952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4187952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4188952fc18eSTheodore Ts'o int s, j, count = 0; 4189952fc18eSTheodore Ts'o 4190e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 41910548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 41920548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41930548bbb8STheodore Ts'o 4194952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4195952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4196952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4197952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4198952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4199952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4200952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4201952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4202952fc18eSTheodore Ts'o count++; 4203952fc18eSTheodore Ts'o } 4204952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4205952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4206952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4207952fc18eSTheodore Ts'o count++; 4208952fc18eSTheodore Ts'o } 4209952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4210952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4211952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4212952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4213952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4214952fc18eSTheodore Ts'o count++; 4215952fc18eSTheodore Ts'o } 4216952fc18eSTheodore Ts'o if (i != grp) 4217952fc18eSTheodore Ts'o continue; 4218952fc18eSTheodore Ts'o s = 0; 4219952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4220952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4221952fc18eSTheodore Ts'o count++; 4222952fc18eSTheodore Ts'o } 4223c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4224c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4225c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4226c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4227c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4228952fc18eSTheodore Ts'o } 4229c48ae41bSTheodore Ts'o count += j; 4230c48ae41bSTheodore Ts'o for (; j > 0; j--) 4231c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4232952fc18eSTheodore Ts'o } 4233952fc18eSTheodore Ts'o if (!count) 4234952fc18eSTheodore Ts'o return 0; 4235952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4236952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4237952fc18eSTheodore Ts'o } 4238952fc18eSTheodore Ts'o 4239952fc18eSTheodore Ts'o /* 4240952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4241952fc18eSTheodore Ts'o */ 4242952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4243952fc18eSTheodore Ts'o { 4244952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4245952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 42463c816dedSEric Whitney struct inode *j_inode; 42473c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4248952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4249952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 42504fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4251952fc18eSTheodore Ts'o 4252952fc18eSTheodore Ts'o if (!buf) 4253952fc18eSTheodore Ts'o return -ENOMEM; 4254952fc18eSTheodore Ts'o 4255952fc18eSTheodore Ts'o /* 4256952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4257952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4258952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4259952fc18eSTheodore Ts'o */ 4260952fc18eSTheodore Ts'o 4261952fc18eSTheodore Ts'o /* 4262952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4263952fc18eSTheodore Ts'o */ 4264952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4265952fc18eSTheodore Ts'o 4266952fc18eSTheodore Ts'o /* 4267952fc18eSTheodore Ts'o * Add the overhead found in each block group 4268952fc18eSTheodore Ts'o */ 4269952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4270952fc18eSTheodore Ts'o int blks; 4271952fc18eSTheodore Ts'o 4272952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4273952fc18eSTheodore Ts'o overhead += blks; 4274952fc18eSTheodore Ts'o if (blks) 4275952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4276952fc18eSTheodore Ts'o cond_resched(); 4277952fc18eSTheodore Ts'o } 42783c816dedSEric Whitney 42793c816dedSEric Whitney /* 42803c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 42813c816dedSEric Whitney * loaded or not 42823c816dedSEric Whitney */ 4283ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4284ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4285f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4286f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 42873c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 42883c816dedSEric Whitney if (j_inode) { 42893c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 42903c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42913c816dedSEric Whitney iput(j_inode); 42923c816dedSEric Whitney } else { 42933c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42943c816dedSEric Whitney } 42953c816dedSEric Whitney } 4296952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4297952fc18eSTheodore Ts'o smp_wmb(); 4298952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4299952fc18eSTheodore Ts'o return 0; 4300952fc18eSTheodore Ts'o } 4301952fc18eSTheodore Ts'o 4302b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 430327dd4385SLukas Czerner { 430427dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4305b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 430627dd4385SLukas Czerner 430727dd4385SLukas Czerner /* 430830fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 430930fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 431030fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 431130fac0f7SJan Kara * to keep ext2/3 backward compatibility. 431230fac0f7SJan Kara */ 4313e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4314b5799018STheodore Ts'o return; 431530fac0f7SJan Kara /* 431627dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 431727dd4385SLukas Czerner * This should cover the situations where we can not afford to run 431827dd4385SLukas Czerner * out of space like for example punch hole, or converting 4319556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 432027dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 432127dd4385SLukas Czerner * very rare. 432227dd4385SLukas Czerner */ 4323b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4324b5799018STheodore Ts'o sbi->s_cluster_bits); 432527dd4385SLukas Czerner 432627dd4385SLukas Czerner do_div(resv_clusters, 50); 432727dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 432827dd4385SLukas Czerner 4329b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 433027dd4385SLukas Czerner } 433127dd4385SLukas Czerner 4332ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4333ca9b404fSRoman Anufriev { 4334ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4335ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4336ca9b404fSRoman Anufriev return "none"; 4337ca9b404fSRoman Anufriev 4338ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4339ca9b404fSRoman Anufriev return "journalled"; 4340ca9b404fSRoman Anufriev else 4341ca9b404fSRoman Anufriev return "writeback"; 4342ca9b404fSRoman Anufriev #else 4343ca9b404fSRoman Anufriev return "disabled"; 4344ca9b404fSRoman Anufriev #endif 4345ca9b404fSRoman Anufriev } 4346ca9b404fSRoman Anufriev 4347188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4348188c299eSJan Kara enum ext4_journal_trigger_type type, 4349188c299eSJan Kara void (*trigger)( 4350188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4351188c299eSJan Kara struct buffer_head *bh, 4352188c299eSJan Kara void *mapped_data, 4353188c299eSJan Kara size_t size)) 4354188c299eSJan Kara { 4355188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4356188c299eSJan Kara 4357188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4358188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4359188c299eSJan Kara } 4360188c299eSJan Kara 4361617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 4362ac27a0ecSDave Kleikamp { 43635e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 4364d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 43651d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4366617ba13bSMingming Cao struct ext4_super_block *es = NULL; 43675aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 43687c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4369617ba13bSMingming Cao ext4_fsblk_t block; 4370617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 437170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4372ac27a0ecSDave Kleikamp unsigned long offset = 0; 4373ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4374ac27a0ecSDave Kleikamp struct inode *root; 43750390131bSFrank Mayhar const char *descr; 4376dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4377281b5995STheodore Ts'o int blocksize, clustersize; 43784ec11028STheodore Ts'o unsigned int db_count; 43794ec11028STheodore Ts'o unsigned int i; 4380ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4381bd81d8eeSLaurent Vivier __u64 blocks_count; 438207aa2ea1SLukas Czerner int err = 0; 4383bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4384e6e268cbSLukas Czerner struct ext4_fs_context parsed_opts = {0}; 4385b237e304SHarshad Shirwadkar 4386b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4387b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4388b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 4389196e402aSHarshad Shirwadkar parsed_opts.mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4390ac27a0ecSDave Kleikamp 43915aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 43925aee0f8aSTheodore Ts'o goto out_free_base; 4393705895b6SPekka Enberg 4394aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 4395705895b6SPekka Enberg sbi->s_blockgroup_lock = 4396705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 43975aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 43985aee0f8aSTheodore Ts'o goto out_free_base; 43995aee0f8aSTheodore Ts'o 4400ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 44012c0544b2STheodore Ts'o sbi->s_sb = sb; 4402240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4403d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 4404f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 44058446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4406ac27a0ecSDave Kleikamp 44079f6200bbSTheodore Ts'o /* Cleanup superblock name */ 4408ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 44099f6200bbSTheodore Ts'o 441007aa2ea1SLukas Czerner /* -EINVAL is default */ 4411dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4412617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4413ac27a0ecSDave Kleikamp if (!blocksize) { 4414b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4415ac27a0ecSDave Kleikamp goto out_fail; 4416ac27a0ecSDave Kleikamp } 4417ac27a0ecSDave Kleikamp 4418ac27a0ecSDave Kleikamp /* 4419617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4420ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4421ac27a0ecSDave Kleikamp */ 4422617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 442370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 442470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4425ac27a0ecSDave Kleikamp } else { 442670bbb3e0SAndrew Morton logical_sb_block = sb_block; 4427ac27a0ecSDave Kleikamp } 4428ac27a0ecSDave Kleikamp 44298394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 44308394a6abSzhangyi (F) if (IS_ERR(bh)) { 4431b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 44328394a6abSzhangyi (F) ret = PTR_ERR(bh); 4433ac27a0ecSDave Kleikamp goto out_fail; 4434ac27a0ecSDave Kleikamp } 4435ac27a0ecSDave Kleikamp /* 4436ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4437617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4438ac27a0ecSDave Kleikamp */ 44392716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4440ac27a0ecSDave Kleikamp sbi->s_es = es; 4441ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4442617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4443617ba13bSMingming Cao goto cantfind_ext4; 4444afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4445ac27a0ecSDave Kleikamp 4446feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4447e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4448e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4449363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4450feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4451feb0ab32SDarrick J. Wong 4452d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4453d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4454d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4455d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4456d25425f8SDarrick J. Wong silent = 1; 4457d25425f8SDarrick J. Wong goto cantfind_ext4; 4458d25425f8SDarrick J. Wong } 445902f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 446002f310fcSJan Kara ext4_orphan_file_block_trigger); 4461d25425f8SDarrick J. Wong 44620441984aSDarrick J. Wong /* Load the checksum driver */ 44630441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 44640441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 44650441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 44660441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 44670441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 44680441984aSDarrick J. Wong goto failed_mount; 44690441984aSDarrick J. Wong } 44700441984aSDarrick J. Wong 4471a9c47317SDarrick J. Wong /* Check superblock checksum */ 4472a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4473a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4474a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4475a9c47317SDarrick J. Wong silent = 1; 44766a797d27SDarrick J. Wong ret = -EFSBADCRC; 4477a9c47317SDarrick J. Wong goto cantfind_ext4; 4478a9c47317SDarrick J. Wong } 4479a9c47317SDarrick J. Wong 4480a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4481e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 44828c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4483dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4484a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4485a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4486a9c47317SDarrick J. Wong 4487ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4488ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4489fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4490617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4491fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 449287f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4493fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4494617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4495fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4496ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4497fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 449803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4499fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 45002e7842b8SHugh Dickins #endif 4501995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4502995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 450398c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 450498c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 450598c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 450698c1a759SDarrick J. Wong 4507617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4508fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4509617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4510fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4511617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4512fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4513ac27a0ecSDave Kleikamp 4514617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4515fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4516bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4517fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4518bb4f397aSAneesh Kumar K.V else 4519fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 452045f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4521fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 45228b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4523fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4524ac27a0ecSDave Kleikamp 452508cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 452608cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 452730773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 452830773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 452930773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4530ac27a0ecSDave Kleikamp 45318b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4532fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4533ac27a0ecSDave Kleikamp 45341e2462f9SMingming Cao /* 4535dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4536dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4537dd919b98SAneesh Kumar K.V */ 4538bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 45398b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4540fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4541dd919b98SAneesh Kumar K.V 454251ce6511SLukas Czerner /* 454351ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 454451ce6511SLukas Czerner * no mount option specified. 454551ce6511SLukas Czerner */ 454651ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 454751ce6511SLukas Czerner 4548c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4549c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4550c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4551c9200760STheodore Ts'o "Invalid log block size: %u", 4552c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4553c9200760STheodore Ts'o goto failed_mount; 4554c9200760STheodore Ts'o } 4555c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4556c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4557c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4558c9200760STheodore Ts'o "Invalid log cluster size: %u", 4559c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4560c9200760STheodore Ts'o goto failed_mount; 4561c9200760STheodore Ts'o } 4562c9200760STheodore Ts'o 4563c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4564626b035bSRitesh Harjani 4565626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4566626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4567626b035bSRitesh Harjani 45689803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 45699803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 45709803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 45719803387cSTheodore Ts'o } else { 45729803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 45739803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 45749803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 45759803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 45769803387cSTheodore Ts'o sbi->s_first_ino); 45779803387cSTheodore Ts'o goto failed_mount; 45789803387cSTheodore Ts'o } 45799803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 45809803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 45819803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 45829803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45839803387cSTheodore Ts'o "unsupported inode size: %d", 45849803387cSTheodore Ts'o sbi->s_inode_size); 45854f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 45869803387cSTheodore Ts'o goto failed_mount; 45879803387cSTheodore Ts'o } 45889803387cSTheodore Ts'o /* 45899803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 45909803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 45919803387cSTheodore Ts'o * field should suffice to ensure we have extra space 45929803387cSTheodore Ts'o * for all three. 45939803387cSTheodore Ts'o */ 45949803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 45959803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 45969803387cSTheodore Ts'o sb->s_time_gran = 1; 45979803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 45989803387cSTheodore Ts'o } else { 45999803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 46009803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 46019803387cSTheodore Ts'o } 46029803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 46039803387cSTheodore Ts'o } 46049803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 46059803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 46069803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 46079803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 46089803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 46099803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 46109803387cSTheodore Ts'o 46119803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 46129803387cSTheodore Ts'o if (v > max) { 46139803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46149803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 46159803387cSTheodore Ts'o goto failed_mount; 46169803387cSTheodore Ts'o } 46179803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46189803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46199803387cSTheodore Ts'o 46209803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 46219803387cSTheodore Ts'o if (v > max) { 46229803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46239803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 46249803387cSTheodore Ts'o goto failed_mount; 46259803387cSTheodore Ts'o } 46269803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46279803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46289803387cSTheodore Ts'o } 46299803387cSTheodore Ts'o } 46309803387cSTheodore Ts'o 46315aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 46325aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 46335aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 46345aee0f8aSTheodore Ts'o GFP_KERNEL); 46355aee0f8aSTheodore Ts'o if (!s_mount_opts) 46365aee0f8aSTheodore Ts'o goto failed_mount; 4637b237e304SHarshad Shirwadkar if (!parse_options(s_mount_opts, sb, &parsed_opts, 0)) { 46388b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 46398b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 46405aee0f8aSTheodore Ts'o s_mount_opts); 46415aee0f8aSTheodore Ts'o } 46425aee0f8aSTheodore Ts'o kfree(s_mount_opts); 46438b67f04aSTheodore Ts'o } 46445a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 4645b237e304SHarshad Shirwadkar if (!parse_options((char *) data, sb, &parsed_opts, 0)) 4646ac27a0ecSDave Kleikamp goto failed_mount; 4647ac27a0ecSDave Kleikamp 4648c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4649f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4650c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4651c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4652c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4653c83ad55eSGabriel Krisman Bertazi 4654c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4655c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4656c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4657c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4658c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4659c83ad55eSGabriel Krisman Bertazi } 4660c83ad55eSGabriel Krisman Bertazi 4661c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4662c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4663c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4664c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4665c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4666c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4667c83ad55eSGabriel Krisman Bertazi encoding_flags); 4668c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4669c83ad55eSGabriel Krisman Bertazi } 4670c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4671c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4672c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4673c83ad55eSGabriel Krisman Bertazi 4674f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4675f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4676c83ad55eSGabriel Krisman Bertazi } 4677c83ad55eSGabriel Krisman Bertazi #endif 4678c83ad55eSGabriel Krisman Bertazi 467956889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4680556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4681781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4682244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4683556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 468456889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 468556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 468656889787STheodore Ts'o "both data=journal and delalloc"); 468756889787STheodore Ts'o goto failed_mount; 468856889787STheodore Ts'o } 4689fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4690923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4691923ae0ffSRoss Zwisler "both data=journal and dax"); 4692923ae0ffSRoss Zwisler goto failed_mount; 4693923ae0ffSRoss Zwisler } 469473b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 469573b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 469673b92a2aSSergey Karamov "encrypted files will use data=ordered " 469773b92a2aSSergey Karamov "instead of data journaling mode"); 469873b92a2aSSergey Karamov } 469956889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 470056889787STheodore Ts'o clear_opt(sb, DELALLOC); 4701001e4a87STejun Heo } else { 4702001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 470356889787STheodore Ts'o } 470456889787STheodore Ts'o 47051751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 47061751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4707ac27a0ecSDave Kleikamp 4708617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4709e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4710e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4711e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4712b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4713b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4714b31e1552SEric Sandeen "running e2fsck is recommended"); 4715469108ffSTheodore Tso 4716ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4717ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4718e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4719ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4720ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4721ed3654ebSTheodore Ts'o goto failed_mount; 4722ed3654ebSTheodore Ts'o } 4723dec214d0STahsin Erdogan 4724dec214d0STahsin Erdogan /* 4725dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4726dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4727dec214d0STahsin Erdogan */ 4728dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4729dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4730dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4731dec214d0STahsin Erdogan goto failed_mount; 4732dec214d0STahsin Erdogan } 4733ed3654ebSTheodore Ts'o } 4734ed3654ebSTheodore Ts'o 47352035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 47362035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 47372035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 47382035e776STheodore Ts'o "using the ext4 subsystem"); 47392035e776STheodore Ts'o else { 47400d9366d6SEric Sandeen /* 47410d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47420d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 47430d9366d6SEric Sandeen */ 47440d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47450d9366d6SEric Sandeen goto failed_mount; 47462035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 47472035e776STheodore Ts'o "to feature incompatibilities"); 47482035e776STheodore Ts'o goto failed_mount; 47492035e776STheodore Ts'o } 47502035e776STheodore Ts'o } 47512035e776STheodore Ts'o 47522035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 47532035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 47542035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 47552035e776STheodore Ts'o "using the ext4 subsystem"); 47562035e776STheodore Ts'o else { 47570d9366d6SEric Sandeen /* 47580d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47590d9366d6SEric Sandeen * it's actually an ext4 filesystem. 47600d9366d6SEric Sandeen */ 47610d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47620d9366d6SEric Sandeen goto failed_mount; 47632035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 47642035e776STheodore Ts'o "to feature incompatibilities"); 47652035e776STheodore Ts'o goto failed_mount; 47662035e776STheodore Ts'o } 47672035e776STheodore Ts'o } 47682035e776STheodore Ts'o 4769469108ffSTheodore Tso /* 4770ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4771ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4772ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4773ac27a0ecSDave Kleikamp */ 4774bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4775ac27a0ecSDave Kleikamp goto failed_mount; 4776a13fb1a4SEric Sandeen 47775b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 47785b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 47795b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 47805b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 47815b9554dcSTheodore Ts'o goto failed_mount; 47825b9554dcSTheodore Ts'o } 47835b9554dcSTheodore Ts'o 4784bdd3c50dSChristoph Hellwig if (dax_supported(dax_dev, sb->s_bdev, blocksize, 0, 4785bdd3c50dSChristoph Hellwig bdev_nr_sectors(sb->s_bdev))) 4786a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4787a8ab6d38SIra Weiny 4788fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4789559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4790559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4791559db4c6SRoss Zwisler " that may contain inline data"); 4792361d24d4SEric Sandeen goto failed_mount; 4793559db4c6SRoss Zwisler } 4794a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 479524f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4796361d24d4SEric Sandeen "DAX unsupported by block device."); 4797361d24d4SEric Sandeen goto failed_mount; 479824f3478dSDan Williams } 4799923ae0ffSRoss Zwisler } 4800923ae0ffSRoss Zwisler 4801e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 48026ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 48036ddb2447STheodore Ts'o es->s_encryption_level); 48046ddb2447STheodore Ts'o goto failed_mount; 48056ddb2447STheodore Ts'o } 48066ddb2447STheodore Ts'o 4807ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4808afd09b61SAlexey Makhalov /* 4809afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4810afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4811afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4812afd09b61SAlexey Makhalov */ 4813afd09b61SAlexey Makhalov brelse(bh); 4814ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4815ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4816b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4817ce40733cSAneesh Kumar K.V blocksize); 4818afd09b61SAlexey Makhalov bh = NULL; 4819ac27a0ecSDave Kleikamp goto failed_mount; 4820ac27a0ecSDave Kleikamp } 4821ac27a0ecSDave Kleikamp 482270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 482370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 48248394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 48258394a6abSzhangyi (F) if (IS_ERR(bh)) { 4826b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4827b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 48288394a6abSzhangyi (F) ret = PTR_ERR(bh); 48298394a6abSzhangyi (F) bh = NULL; 4830ac27a0ecSDave Kleikamp goto failed_mount; 4831ac27a0ecSDave Kleikamp } 48322716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4833ac27a0ecSDave Kleikamp sbi->s_es = es; 4834617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4835b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4836b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4837ac27a0ecSDave Kleikamp goto failed_mount; 4838ac27a0ecSDave Kleikamp } 4839ac27a0ecSDave Kleikamp } 4840ac27a0ecSDave Kleikamp 4841e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4842f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4843f287a1a5STheodore Ts'o has_huge_files); 4844f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4845ac27a0ecSDave Kleikamp 48460d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4847e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 48488fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 48490d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4850d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4852b31e1552SEric Sandeen "unsupported descriptor size %lu", 48530d1ee42fSAlexandre Ratchov sbi->s_desc_size); 48540d1ee42fSAlexandre Ratchov goto failed_mount; 48550d1ee42fSAlexandre Ratchov } 48560d1ee42fSAlexandre Ratchov } else 48570d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 48580b8e58a1SAndreas Dilger 4859ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4860ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 48610b8e58a1SAndreas Dilger 4862617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4863ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4864617ba13bSMingming Cao goto cantfind_ext4; 4865cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4866cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4867cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4868b9c538daSJosh Triplett sbi->s_inodes_per_group); 4869cd6bb35bSTheodore Ts'o goto failed_mount; 4870cd6bb35bSTheodore Ts'o } 4871ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4872ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 48730d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4874ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4875ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4876e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4877e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 48780b8e58a1SAndreas Dilger 4879ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4880ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4881ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4882e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4883f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4884f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4885f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4886f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4887f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4888bc98a42cSDavid Howells if (!sb_rdonly(sb)) 488923301410STheodore Ts'o es->s_flags |= 489023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4891f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4892f99b2589STheodore Ts'o #else 4893bc98a42cSDavid Howells if (!sb_rdonly(sb)) 489423301410STheodore Ts'o es->s_flags |= 489523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4896f99b2589STheodore Ts'o #endif 4897f99b2589STheodore Ts'o } 489823301410STheodore Ts'o } 4899ac27a0ecSDave Kleikamp 4900281b5995STheodore Ts'o /* Handle clustersize */ 4901281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4902ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4903281b5995STheodore Ts'o if (clustersize < blocksize) { 4904281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4905281b5995STheodore Ts'o "cluster size (%d) smaller than " 4906281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4907281b5995STheodore Ts'o goto failed_mount; 4908281b5995STheodore Ts'o } 4909281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4910281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4911281b5995STheodore Ts'o sbi->s_clusters_per_group = 4912281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4913281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4914281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4915281b5995STheodore Ts'o "#clusters per group too big: %lu", 4916281b5995STheodore Ts'o sbi->s_clusters_per_group); 4917281b5995STheodore Ts'o goto failed_mount; 4918281b5995STheodore Ts'o } 4919281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4920281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4921281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4922281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4923281b5995STheodore Ts'o sbi->s_blocks_per_group, 4924281b5995STheodore Ts'o sbi->s_clusters_per_group); 4925281b5995STheodore Ts'o goto failed_mount; 4926281b5995STheodore Ts'o } 4927281b5995STheodore Ts'o } else { 4928281b5995STheodore Ts'o if (clustersize != blocksize) { 4929bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4930bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4931bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4932bfe0a5f4STheodore Ts'o goto failed_mount; 4933281b5995STheodore Ts'o } 4934ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4935b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4936b31e1552SEric Sandeen "#blocks per group too big: %lu", 4937ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4938ac27a0ecSDave Kleikamp goto failed_mount; 4939ac27a0ecSDave Kleikamp } 4940281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4941281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4942281b5995STheodore Ts'o } 4943281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4944281b5995STheodore Ts'o 4945960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4946960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4947960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4948960fd856STheodore Ts'o 4949bf43d84bSEric Sandeen /* 4950bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4951bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4952bf43d84bSEric Sandeen */ 49535a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 495430ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 49555a9ae68aSDarrick J. Wong if (err) { 4956b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4957bf43d84bSEric Sandeen " too large to mount safely on this system"); 4958ac27a0ecSDave Kleikamp goto failed_mount; 4959ac27a0ecSDave Kleikamp } 4960ac27a0ecSDave Kleikamp 4961617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4962617ba13bSMingming Cao goto cantfind_ext4; 4963e7c95593SEric Sandeen 49640f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 49655513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 49660f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4967b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4968b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 49690f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 49700f2ddca6SFrom: Thiemo Nagel goto failed_mount; 49710f2ddca6SFrom: Thiemo Nagel } 49720f2ddca6SFrom: Thiemo Nagel 49734ec11028STheodore Ts'o /* 49744ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 49754ec11028STheodore Ts'o * of the filesystem. 49764ec11028STheodore Ts'o */ 49774ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4978b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4979b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4980e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 49814ec11028STheodore Ts'o ext4_blocks_count(es)); 4982e7c95593SEric Sandeen goto failed_mount; 4983e7c95593SEric Sandeen } 4984bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4985bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4986bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4987bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4988bfe0a5f4STheodore Ts'o goto failed_mount; 4989bfe0a5f4STheodore Ts'o } 4990bfe0a5f4STheodore Ts'o 4991bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4992bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4993bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4994bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 49954ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4996df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 49974ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4998df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 49994ec11028STheodore Ts'o ext4_blocks_count(es), 50004ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 50014ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 50024ec11028STheodore Ts'o goto failed_mount; 50034ec11028STheodore Ts'o } 5004bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 5005fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 5006fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 50079e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 50089e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 50099e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 50109e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 50119e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 50129e463084STheodore Ts'o ret = -EINVAL; 50139e463084STheodore Ts'o goto failed_mount; 50149e463084STheodore Ts'o } 5015617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 5016617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 50173a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 50182ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 50193a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 50203a4b77cdSEryu Guan "first meta block group too large: %u " 50213a4b77cdSEryu Guan "(group descriptor block count %u)", 50223a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 50233a4b77cdSEryu Guan goto failed_mount; 50243a4b77cdSEryu Guan } 50253a4b77cdSEryu Guan } 50261d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 50271d0c3924STheodore Ts'o kvmalloc_array(db_count, 5028f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 50291d0c3924STheodore Ts'o GFP_KERNEL)); 5030ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 5031b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 50322cde417dSTheodore Ts'o ret = -ENOMEM; 5033ac27a0ecSDave Kleikamp goto failed_mount; 5034ac27a0ecSDave Kleikamp } 5035ac27a0ecSDave Kleikamp 5036705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 5037ac27a0ecSDave Kleikamp 503885c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 503985c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 504085c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 50415df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 504285c8f176SAndrew Perepechko } 504385c8f176SAndrew Perepechko 5044ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 50451d0c3924STheodore Ts'o struct buffer_head *bh; 50461d0c3924STheodore Ts'o 504770bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 50488394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 50498394a6abSzhangyi (F) if (IS_ERR(bh)) { 5050b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5051b31e1552SEric Sandeen "can't read group descriptor %d", i); 5052ac27a0ecSDave Kleikamp db_count = i; 50538394a6abSzhangyi (F) ret = PTR_ERR(bh); 5054ac27a0ecSDave Kleikamp goto failed_mount2; 5055ac27a0ecSDave Kleikamp } 50561d0c3924STheodore Ts'o rcu_read_lock(); 50571d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 50581d0c3924STheodore Ts'o rcu_read_unlock(); 5059ac27a0ecSDave Kleikamp } 506044de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 5061829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 5062b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 50636a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 5064f9ae9cf5STheodore Ts'o goto failed_mount2; 5065ac27a0ecSDave Kleikamp } 5066772cb7c8SJose R. Santos 5067235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5068c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5069c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 507004496411STao Ma 5071a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5072eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5073ce7e010aSTheodore Ts'o goto failed_mount3; 5074ce7e010aSTheodore Ts'o 5075c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 507667a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5077c9de560dSAlex Tomas 5078f9ae9cf5STheodore Ts'o /* 5079f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5080f9ae9cf5STheodore Ts'o */ 5081f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5082617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5083617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5084643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5085a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5086ffcc4182SEric Biggers #endif 5087c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5088c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5089c93d8f88SEric Biggers #endif 5090ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5091617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5092e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 50931fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5094262b4662SJan Kara else 5095262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5096689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5097ac27a0ecSDave Kleikamp #endif 509885787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5099f2fa2ffcSAneesh Kumar K.V 5100ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 51013b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5102ac27a0ecSDave Kleikamp 5103aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 5104aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 5105aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_ineligible_updates, 0); 5106aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 5107aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 5108aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 5109aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 5110aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 51119b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 51129b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 5113aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 5114aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 51158016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 51168016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 51178016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 51188016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 51198016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 51208016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 51218016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 5122aa75f4d3SHarshad Shirwadkar 5123ac27a0ecSDave Kleikamp sb->s_root = NULL; 5124ac27a0ecSDave Kleikamp 5125ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 512602f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5127e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5128ac27a0ecSDave Kleikamp 5129bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5130c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 513150460fe8SDarrick J. Wong goto failed_mount3a; 5132c5e06d10SJohann Lombardi 5133ac27a0ecSDave Kleikamp /* 5134ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5135ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5136ac27a0ecSDave Kleikamp */ 5137e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 5138b237e304SHarshad Shirwadkar err = ext4_load_journal(sb, es, parsed_opts.journal_devnum); 51394753d8a2STheodore Ts'o if (err) 514050460fe8SDarrick J. Wong goto failed_mount3a; 5141bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5142e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5143b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5144b31e1552SEric Sandeen "suppressed and not mounted read-only"); 5145744692dcSJiaying Zhang goto failed_mount_wq; 5146ac27a0ecSDave Kleikamp } else { 51471e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 51481e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 51491e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51501e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 51511e381f60SDmitry Monakhov goto failed_mount_wq; 51521e381f60SDmitry Monakhov } 51531e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 51541e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51551e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 51561e381f60SDmitry Monakhov goto failed_mount_wq; 51571e381f60SDmitry Monakhov } 51581e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 51591e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51601e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 51611e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 51621e381f60SDmitry Monakhov goto failed_mount_wq; 51631e381f60SDmitry Monakhov } 51641e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 51651e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 51661e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51671e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 51681e381f60SDmitry Monakhov goto failed_mount_wq; 51691e381f60SDmitry Monakhov } 517050b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 51711e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5172fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5173995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 51740390131bSFrank Mayhar sbi->s_journal = NULL; 51750390131bSFrank Mayhar needs_recovery = 0; 51760390131bSFrank Mayhar goto no_journal; 5177ac27a0ecSDave Kleikamp } 5178ac27a0ecSDave Kleikamp 5179e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5180eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5181eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5182b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5183744692dcSJiaying Zhang goto failed_mount_wq; 5184eb40a09cSJose R. Santos } 5185eb40a09cSJose R. Santos 518625ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 518725ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 518825ed6e8aSDarrick J. Wong "feature set"); 518925ed6e8aSDarrick J. Wong goto failed_mount_wq; 5190d4da6c9cSLinus Torvalds } 5191818d276cSGirish Shilamkar 5192a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5193a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5194a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5195a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5196a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5197a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5198a1e5e465SHarshad Shirwadkar } 5199a1e5e465SHarshad Shirwadkar 5200ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5201ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5202ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5203ac27a0ecSDave Kleikamp case 0: 5204ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 520563f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 520663f57933SAndrew Morton * cope, else JOURNAL_DATA 520763f57933SAndrew Morton */ 5208dab291afSMingming Cao if (jbd2_journal_check_available_features 520927f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5210fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 521127f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 521227f394a7STyson Nottingham } else { 5213fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 521427f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 521527f394a7STyson Nottingham } 5216ac27a0ecSDave Kleikamp break; 5217ac27a0ecSDave Kleikamp 5218617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5219617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5220dab291afSMingming Cao if (!jbd2_journal_check_available_features 5221dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5222b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5223b31e1552SEric Sandeen "requested data journaling mode"); 5224744692dcSJiaying Zhang goto failed_mount_wq; 5225ac27a0ecSDave Kleikamp } 52265a150bdeSGustavo A. R. Silva break; 5227ac27a0ecSDave Kleikamp default: 5228ac27a0ecSDave Kleikamp break; 5229ac27a0ecSDave Kleikamp } 5230ab04df78SJan Kara 5231ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5232ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5233ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5234ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5235ab04df78SJan Kara goto failed_mount_wq; 5236ab04df78SJan Kara } 5237ab04df78SJan Kara 5238b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 5239ac27a0ecSDave Kleikamp 5240342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5241afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5242342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5243afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 524418aadd47SBobi Jam 5245ce7e010aSTheodore Ts'o no_journal: 5246cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 524747387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 524847387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5249cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5250cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 52519c191f70ST Makphaibulchoke goto failed_mount_wq; 52529c191f70ST Makphaibulchoke } 52539c191f70ST Makphaibulchoke 5254dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5255dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5256dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5257dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5258dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5259dec214d0STahsin Erdogan goto failed_mount_wq; 5260dec214d0STahsin Erdogan } 5261dec214d0STahsin Erdogan } 5262cdb7ee4cSTahsin Erdogan } 5263dec214d0STahsin Erdogan 5264c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5265c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5266c93d8f88SEric Biggers goto failed_mount_wq; 5267c93d8f88SEric Biggers } 5268c93d8f88SEric Biggers 5269bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 5270e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 5271e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 52724392fbc4SJan Kara ext4_commit_super(sb); 52736ddb2447STheodore Ts'o } 52746ddb2447STheodore Ts'o 5275fd89d5f2STejun Heo /* 5276952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5277952fc18eSTheodore Ts'o * superblock if present. 5278952fc18eSTheodore Ts'o */ 5279952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 5280952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 5281952fc18eSTheodore Ts'o else { 528207aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 528307aa2ea1SLukas Czerner if (err) 5284952fc18eSTheodore Ts'o goto failed_mount_wq; 5285952fc18eSTheodore Ts'o } 5286952fc18eSTheodore Ts'o 5287952fc18eSTheodore Ts'o /* 5288fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5289fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5290fd89d5f2STejun Heo */ 52912e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 52922e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 52932e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 52942e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 529507aa2ea1SLukas Czerner ret = -ENOMEM; 52962e8fa54eSJan Kara goto failed_mount4; 52972e8fa54eSJan Kara } 52982e8fa54eSJan Kara 5299ac27a0ecSDave Kleikamp /* 5300dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5301ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5302ac27a0ecSDave Kleikamp */ 5303ac27a0ecSDave Kleikamp 53048a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 53051d1fe1eeSDavid Howells if (IS_ERR(root)) { 5306b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 53071d1fe1eeSDavid Howells ret = PTR_ERR(root); 530832a9bb57SManish Katiyar root = NULL; 5309ac27a0ecSDave Kleikamp goto failed_mount4; 5310ac27a0ecSDave Kleikamp } 5311ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5312b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 531394bf608aSAl Viro iput(root); 5314ac27a0ecSDave Kleikamp goto failed_mount4; 5315ac27a0ecSDave Kleikamp } 5316b886ee3eSGabriel Krisman Bertazi 531748fde701SAl Viro sb->s_root = d_make_root(root); 53181d1fe1eeSDavid Howells if (!sb->s_root) { 5319b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 53201d1fe1eeSDavid Howells ret = -ENOMEM; 53211d1fe1eeSDavid Howells goto failed_mount4; 53221d1fe1eeSDavid Howells } 5323ac27a0ecSDave Kleikamp 5324c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5325c89128a0SJaegeuk Kim if (ret == -EROFS) { 53261751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5327c89128a0SJaegeuk Kim ret = 0; 5328c89128a0SJaegeuk Kim } else if (ret) 5329c89128a0SJaegeuk Kim goto failed_mount4a; 5330ef7f3835SKalpak Shah 5331b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 533227dd4385SLukas Czerner 53330f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 53346fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 53356fd058f7STheodore Ts'o if (err) { 5336b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5337fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5338f9ae9cf5STheodore Ts'o goto failed_mount4a; 5339f9ae9cf5STheodore Ts'o } 53400f5bde1dSJan Kara } 53418016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5342f9ae9cf5STheodore Ts'o 5343f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5344196e402aSHarshad Shirwadkar 5345196e402aSHarshad Shirwadkar /* 5346196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5347196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5348196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5349196e402aSHarshad Shirwadkar */ 5350196e402aSHarshad Shirwadkar if (parsed_opts.mb_optimize_scan == 1) 5351196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5352196e402aSHarshad Shirwadkar else if (parsed_opts.mb_optimize_scan == 0) 5353196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5354196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5355196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5356196e402aSHarshad Shirwadkar 5357f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5358f9ae9cf5STheodore Ts'o if (err) { 5359f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5360f9ae9cf5STheodore Ts'o err); 5361dcf2d804STao Ma goto failed_mount5; 5362c2774d84SAneesh Kumar K.V } 5363c2774d84SAneesh Kumar K.V 5364027f14f5STheodore Ts'o /* 5365027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5366027f14f5STheodore Ts'o * mballoc is initialized 5367027f14f5STheodore Ts'o */ 5368027f14f5STheodore Ts'o if (sbi->s_journal) 5369027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5370027f14f5STheodore Ts'o ext4_journal_commit_callback; 5371027f14f5STheodore Ts'o 5372d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5373d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5374d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5375908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5376908c7f19STejun Heo GFP_KERNEL); 5377d5e03cbbSTheodore Ts'o if (!err) { 5378d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5379d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5380908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5381908c7f19STejun Heo GFP_KERNEL); 5382d5e03cbbSTheodore Ts'o } 5383b2bbb92fSJan Kara /* 5384b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5385b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5386b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5387b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5388b2bbb92fSJan Kara * after it is mounted can fail. 5389b2bbb92fSJan Kara */ 5390b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5391d5e03cbbSTheodore Ts'o if (!err) 5392d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5393908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5394d5e03cbbSTheodore Ts'o if (!err) 5395908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5396908c7f19STejun Heo GFP_KERNEL); 5397c8585c6fSDaeho Jeong if (!err) 5398efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5399efc61345SEric Whitney GFP_KERNEL); 5400efc61345SEric Whitney if (!err) 5401bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5402c8585c6fSDaeho Jeong 5403d5e03cbbSTheodore Ts'o if (err) { 5404d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5405d5e03cbbSTheodore Ts'o goto failed_mount6; 5406d5e03cbbSTheodore Ts'o } 5407d5e03cbbSTheodore Ts'o 5408e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5409d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5410d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5411d5e03cbbSTheodore Ts'o "unable to initialize " 5412d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 54138f6840c4SYang Yingliang ret = -ENOMEM; 5414d5e03cbbSTheodore Ts'o goto failed_mount6; 5415d5e03cbbSTheodore Ts'o } 5416d5e03cbbSTheodore Ts'o 5417bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5418bfff6873SLukas Czerner if (err) 5419dcf2d804STao Ma goto failed_mount6; 5420bfff6873SLukas Czerner 5421b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5422dcf2d804STao Ma if (err) 5423dcf2d804STao Ma goto failed_mount7; 54243197ebdbSTheodore Ts'o 542502f310fcSJan Kara err = ext4_init_orphan_info(sb); 542602f310fcSJan Kara if (err) 542702f310fcSJan Kara goto failed_mount8; 54289b2ff357SJan Kara #ifdef CONFIG_QUOTA 54299b2ff357SJan Kara /* Enable quota usage during mount. */ 5430bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 54319b2ff357SJan Kara err = ext4_enable_quotas(sb); 54329b2ff357SJan Kara if (err) 543302f310fcSJan Kara goto failed_mount9; 54349b2ff357SJan Kara } 54359b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 54369b2ff357SJan Kara 5437bc71726cSzhangyi (F) /* 5438bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5439bc71726cSzhangyi (F) * used to detect the metadata async write error. 5440bc71726cSzhangyi (F) */ 5441bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5442bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5443bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5444bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5445617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5446617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5447617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 54480390131bSFrank Mayhar if (needs_recovery) { 5449b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 545011215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 545111215630SJan Kara if (err) 545202f310fcSJan Kara goto failed_mount9; 54530390131bSFrank Mayhar } 54540390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 54550390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 54560390131bSFrank Mayhar descr = " journalled data mode"; 54570390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 54580390131bSFrank Mayhar descr = " ordered data mode"; 54590390131bSFrank Mayhar else 54600390131bSFrank Mayhar descr = " writeback data mode"; 54610390131bSFrank Mayhar } else 54620390131bSFrank Mayhar descr = "out journal"; 54630390131bSFrank Mayhar 546479add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 546579add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 546679add3a3SLukas Czerner if (!blk_queue_discard(q)) 546779add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 546879add3a3SLukas Czerner "mounting with \"discard\" option, but " 546979add3a3SLukas Czerner "the device does not support discard"); 547079add3a3SLukas Czerner } 547179add3a3SLukas Czerner 5472e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 5473d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5474ca9b404fSRoman Anufriev "Opts: %.*s%s%s. Quota mode: %s.", descr, 54755aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 54765aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 5477ca9b404fSRoman Anufriev *sbi->s_es->s_mount_opts ? "; " : "", orig_data, 5478ca9b404fSRoman Anufriev ext4_quota_mode(sb)); 5479ac27a0ecSDave Kleikamp 548066e61a9eSTheodore Ts'o if (es->s_error_count) 548166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5482ac27a0ecSDave Kleikamp 5483efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5484efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5485efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5486efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 54871cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 54881cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5489efbed4dcSTheodore Ts'o 5490d4c402d9SCurt Wohlgemuth kfree(orig_data); 5491ac27a0ecSDave Kleikamp return 0; 5492ac27a0ecSDave Kleikamp 5493617ba13bSMingming Cao cantfind_ext4: 5494ac27a0ecSDave Kleikamp if (!silent) 5495b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5496ac27a0ecSDave Kleikamp goto failed_mount; 5497ac27a0ecSDave Kleikamp 549802f310fcSJan Kara failed_mount9: 549902f310fcSJan Kara ext4_release_orphan_info(sb); 550072ba7450STheodore Ts'o failed_mount8: 5501ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5502cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5503dcf2d804STao Ma failed_mount7: 5504dcf2d804STao Ma ext4_unregister_li_request(sb); 5505dcf2d804STao Ma failed_mount6: 5506f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 55077c990728SSuraj Jitindar Singh rcu_read_lock(); 55087c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 55097c990728SSuraj Jitindar Singh if (flex_groups) { 55107c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 55117c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 55127c990728SSuraj Jitindar Singh kvfree(flex_groups); 55137c990728SSuraj Jitindar Singh } 55147c990728SSuraj Jitindar Singh rcu_read_unlock(); 5515d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5516d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5517d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5518d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5519efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5520bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 552100764937SAzat Khuzhin failed_mount5: 5522f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5523f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5524f9ae9cf5STheodore Ts'o failed_mount4a: 552594bf608aSAl Viro dput(sb->s_root); 552632a9bb57SManish Katiyar sb->s_root = NULL; 552794bf608aSAl Viro failed_mount4: 5528b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 55292e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 55302e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 55314c0425ffSMingming Cao failed_mount_wq: 5532dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5533dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 553450c15df6SChengguang Xu 553547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 553647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 553750c15df6SChengguang Xu 55380390131bSFrank Mayhar if (sbi->s_journal) { 5539bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5540bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5541dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 554247b4a50bSJan Kara sbi->s_journal = NULL; 55430390131bSFrank Mayhar } 554450460fe8SDarrick J. Wong failed_mount3a: 5545d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5546eb68d0e2SZheng Liu failed_mount3: 5547bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5548c92dc856SJan Kara flush_work(&sbi->s_error_work); 55492a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5550618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5551ac27a0ecSDave Kleikamp failed_mount2: 55521d0c3924STheodore Ts'o rcu_read_lock(); 55531d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5554ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 55551d0c3924STheodore Ts'o brelse(group_desc[i]); 55561d0c3924STheodore Ts'o kvfree(group_desc); 55571d0c3924STheodore Ts'o rcu_read_unlock(); 5558ac27a0ecSDave Kleikamp failed_mount: 55590441984aSDarrick J. Wong if (sbi->s_chksum_driver) 55600441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5561c83ad55eSGabriel Krisman Bertazi 5562c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5563f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5564c83ad55eSGabriel Krisman Bertazi #endif 5565c83ad55eSGabriel Krisman Bertazi 5566ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5567a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 55680ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5569ac27a0ecSDave Kleikamp #endif 5570ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5571afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5572ac27a0ecSDave Kleikamp brelse(bh); 5573afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5574ac27a0ecSDave Kleikamp out_fail: 5575ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5576f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 55775aee0f8aSTheodore Ts'o out_free_base: 5578ac27a0ecSDave Kleikamp kfree(sbi); 5579d4c402d9SCurt Wohlgemuth kfree(orig_data); 55805e405595SDan Williams fs_put_dax(dax_dev); 558107aa2ea1SLukas Czerner return err ? err : ret; 5582ac27a0ecSDave Kleikamp } 5583ac27a0ecSDave Kleikamp 5584ac27a0ecSDave Kleikamp /* 5585ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5586ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5587ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5588ac27a0ecSDave Kleikamp */ 5589617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5590ac27a0ecSDave Kleikamp { 5591617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5592ac27a0ecSDave Kleikamp 5593ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 559430773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 559530773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 55966866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5597ac27a0ecSDave Kleikamp 5598a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5599ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5600dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5601ac27a0ecSDave Kleikamp else 5602dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 56035bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 56045bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 56055bf5683aSHidehiro Kawai else 56065bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5607a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5608ac27a0ecSDave Kleikamp } 5609ac27a0ecSDave Kleikamp 5610c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5611ac27a0ecSDave Kleikamp unsigned int journal_inum) 5612ac27a0ecSDave Kleikamp { 5613ac27a0ecSDave Kleikamp struct inode *journal_inode; 5614ac27a0ecSDave Kleikamp 5615c6cb7e77SEric Whitney /* 5616c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5617c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5618c6cb7e77SEric Whitney * will try to delete it. 5619c6cb7e77SEric Whitney */ 56208a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 56211d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5622b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5623ac27a0ecSDave Kleikamp return NULL; 5624ac27a0ecSDave Kleikamp } 5625ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5626ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5627ac27a0ecSDave Kleikamp iput(journal_inode); 5628b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5629ac27a0ecSDave Kleikamp return NULL; 5630ac27a0ecSDave Kleikamp } 5631ac27a0ecSDave Kleikamp 5632e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5633ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 56341d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5635b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5636ac27a0ecSDave Kleikamp iput(journal_inode); 5637ac27a0ecSDave Kleikamp return NULL; 5638ac27a0ecSDave Kleikamp } 5639c6cb7e77SEric Whitney return journal_inode; 5640c6cb7e77SEric Whitney } 5641c6cb7e77SEric Whitney 5642c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5643c6cb7e77SEric Whitney unsigned int journal_inum) 5644c6cb7e77SEric Whitney { 5645c6cb7e77SEric Whitney struct inode *journal_inode; 5646c6cb7e77SEric Whitney journal_t *journal; 5647c6cb7e77SEric Whitney 564811215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 564911215630SJan Kara return NULL; 5650c6cb7e77SEric Whitney 5651c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5652c6cb7e77SEric Whitney if (!journal_inode) 5653c6cb7e77SEric Whitney return NULL; 5654ac27a0ecSDave Kleikamp 5655dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5656ac27a0ecSDave Kleikamp if (!journal) { 5657b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5658ac27a0ecSDave Kleikamp iput(journal_inode); 5659ac27a0ecSDave Kleikamp return NULL; 5660ac27a0ecSDave Kleikamp } 5661ac27a0ecSDave Kleikamp journal->j_private = sb; 5662617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5663ac27a0ecSDave Kleikamp return journal; 5664ac27a0ecSDave Kleikamp } 5665ac27a0ecSDave Kleikamp 5666617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5667ac27a0ecSDave Kleikamp dev_t j_dev) 5668ac27a0ecSDave Kleikamp { 5669ac27a0ecSDave Kleikamp struct buffer_head *bh; 5670ac27a0ecSDave Kleikamp journal_t *journal; 5671617ba13bSMingming Cao ext4_fsblk_t start; 5672617ba13bSMingming Cao ext4_fsblk_t len; 5673ac27a0ecSDave Kleikamp int hblock, blocksize; 5674617ba13bSMingming Cao ext4_fsblk_t sb_block; 5675ac27a0ecSDave Kleikamp unsigned long offset; 5676617ba13bSMingming Cao struct ext4_super_block *es; 5677ac27a0ecSDave Kleikamp struct block_device *bdev; 5678ac27a0ecSDave Kleikamp 567911215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 568011215630SJan Kara return NULL; 56810390131bSFrank Mayhar 5682b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5683ac27a0ecSDave Kleikamp if (bdev == NULL) 5684ac27a0ecSDave Kleikamp return NULL; 5685ac27a0ecSDave Kleikamp 5686ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5687e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5688ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5690b31e1552SEric Sandeen "blocksize too small for journal device"); 5691ac27a0ecSDave Kleikamp goto out_bdev; 5692ac27a0ecSDave Kleikamp } 5693ac27a0ecSDave Kleikamp 5694617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5695617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5696ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5697ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5698b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5699b31e1552SEric Sandeen "external journal"); 5700ac27a0ecSDave Kleikamp goto out_bdev; 5701ac27a0ecSDave Kleikamp } 5702ac27a0ecSDave Kleikamp 57032716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5704617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5705ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5706617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5707b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5708b31e1552SEric Sandeen "bad superblock"); 5709ac27a0ecSDave Kleikamp brelse(bh); 5710ac27a0ecSDave Kleikamp goto out_bdev; 5711ac27a0ecSDave Kleikamp } 5712ac27a0ecSDave Kleikamp 5713df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5714df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5715df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5716df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5717df4763beSDarrick J. Wong "corrupt superblock"); 5718df4763beSDarrick J. Wong brelse(bh); 5719df4763beSDarrick J. Wong goto out_bdev; 5720df4763beSDarrick J. Wong } 5721df4763beSDarrick J. Wong 5722617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5723b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5724ac27a0ecSDave Kleikamp brelse(bh); 5725ac27a0ecSDave Kleikamp goto out_bdev; 5726ac27a0ecSDave Kleikamp } 5727ac27a0ecSDave Kleikamp 5728bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5729ac27a0ecSDave Kleikamp start = sb_block + 1; 5730ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5731ac27a0ecSDave Kleikamp 5732dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5733ac27a0ecSDave Kleikamp start, len, blocksize); 5734ac27a0ecSDave Kleikamp if (!journal) { 5735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5736ac27a0ecSDave Kleikamp goto out_bdev; 5737ac27a0ecSDave Kleikamp } 5738ac27a0ecSDave Kleikamp journal->j_private = sb; 57392d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5740b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5741ac27a0ecSDave Kleikamp goto out_journal; 5742ac27a0ecSDave Kleikamp } 5743ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5744b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5745b31e1552SEric Sandeen "user (unsupported) - %d", 5746ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5747ac27a0ecSDave Kleikamp goto out_journal; 5748ac27a0ecSDave Kleikamp } 5749ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5750617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5751ac27a0ecSDave Kleikamp return journal; 57520b8e58a1SAndreas Dilger 5753ac27a0ecSDave Kleikamp out_journal: 5754dab291afSMingming Cao jbd2_journal_destroy(journal); 5755ac27a0ecSDave Kleikamp out_bdev: 5756617ba13bSMingming Cao ext4_blkdev_put(bdev); 5757ac27a0ecSDave Kleikamp return NULL; 5758ac27a0ecSDave Kleikamp } 5759ac27a0ecSDave Kleikamp 5760617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5761617ba13bSMingming Cao struct ext4_super_block *es, 5762ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5763ac27a0ecSDave Kleikamp { 5764ac27a0ecSDave Kleikamp journal_t *journal; 5765ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5766ac27a0ecSDave Kleikamp dev_t journal_dev; 5767ac27a0ecSDave Kleikamp int err = 0; 5768ac27a0ecSDave Kleikamp int really_read_only; 5769273108faSLukas Czerner int journal_dev_ro; 5770ac27a0ecSDave Kleikamp 577111215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 577211215630SJan Kara return -EFSCORRUPTED; 57730390131bSFrank Mayhar 5774ac27a0ecSDave Kleikamp if (journal_devnum && 5775ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5776b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5777b31e1552SEric Sandeen "numbers have changed"); 5778ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5779ac27a0ecSDave Kleikamp } else 5780ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5781ac27a0ecSDave Kleikamp 5782273108faSLukas Czerner if (journal_inum && journal_dev) { 5783273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5784273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5785273108faSLukas Czerner return -EINVAL; 5786273108faSLukas Czerner } 5787273108faSLukas Czerner 5788273108faSLukas Czerner if (journal_inum) { 5789273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5790273108faSLukas Czerner if (!journal) 5791273108faSLukas Czerner return -EINVAL; 5792273108faSLukas Czerner } else { 5793273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5794273108faSLukas Czerner if (!journal) 5795273108faSLukas Czerner return -EINVAL; 5796273108faSLukas Czerner } 5797273108faSLukas Czerner 5798273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5799273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5800273108faSLukas Czerner 5801273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5802273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5803273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5804273108faSLukas Czerner err = -EROFS; 5805273108faSLukas Czerner goto err_out; 5806273108faSLukas Czerner } 5807ac27a0ecSDave Kleikamp 5808ac27a0ecSDave Kleikamp /* 5809ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5810ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5811ac27a0ecSDave Kleikamp * can get read-write access to the device. 5812ac27a0ecSDave Kleikamp */ 5813e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5814bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5815b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5816b31e1552SEric Sandeen "required on readonly filesystem"); 5817ac27a0ecSDave Kleikamp if (really_read_only) { 5818b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5819d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5820d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5821273108faSLukas Czerner err = -EROFS; 5822273108faSLukas Czerner goto err_out; 5823ac27a0ecSDave Kleikamp } 5824b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5825b31e1552SEric Sandeen "be enabled during recovery"); 5826ac27a0ecSDave Kleikamp } 5827ac27a0ecSDave Kleikamp } 5828ac27a0ecSDave Kleikamp 582990576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5830b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 58314776004fSTheodore Ts'o 5832e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5833dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 58341c13d5c0STheodore Ts'o if (!err) { 58351c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 58361c13d5c0STheodore Ts'o if (save) 58371c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 58381c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5839dab291afSMingming Cao err = jbd2_journal_load(journal); 58401c13d5c0STheodore Ts'o if (save) 58411c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 58421c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 58431c13d5c0STheodore Ts'o kfree(save); 58441c13d5c0STheodore Ts'o } 5845ac27a0ecSDave Kleikamp 5846ac27a0ecSDave Kleikamp if (err) { 5847b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5848273108faSLukas Czerner goto err_out; 5849ac27a0ecSDave Kleikamp } 5850ac27a0ecSDave Kleikamp 5851617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 585211215630SJan Kara err = ext4_clear_journal_err(sb, es); 585311215630SJan Kara if (err) { 585411215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 585511215630SJan Kara jbd2_journal_destroy(journal); 585611215630SJan Kara return err; 585711215630SJan Kara } 5858ac27a0ecSDave Kleikamp 5859c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5860ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5861ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5862ac27a0ecSDave Kleikamp 5863ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 58644392fbc4SJan Kara ext4_commit_super(sb); 5865ac27a0ecSDave Kleikamp } 5866ac27a0ecSDave Kleikamp 5867ac27a0ecSDave Kleikamp return 0; 5868273108faSLukas Czerner 5869273108faSLukas Czerner err_out: 5870273108faSLukas Czerner jbd2_journal_destroy(journal); 5871273108faSLukas Czerner return err; 5872ac27a0ecSDave Kleikamp } 5873ac27a0ecSDave Kleikamp 58742d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 58752d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5876ac27a0ecSDave Kleikamp { 5877c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5878e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5879e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5880ac27a0ecSDave Kleikamp 588105c2c00fSJan Kara lock_buffer(sbh); 5882a17712c8SJon Derrick /* 588371290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 588471290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 588571290b36STheodore Ts'o * write time when we are mounting the root file system 588671290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 588771290b36STheodore Ts'o * for people who are east of GMT and who make their clock 588871290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 588971290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 589071290b36STheodore Ts'o * to complain and force a full file system check. 589171290b36STheodore Ts'o */ 58921751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 58936a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5894afc32f7eSTheodore Ts'o es->s_kbytes_written = 5895e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 58968446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5897e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5898e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 589957042651STheodore Ts'o ext4_free_blocks_count_set(es, 5900e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5901e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5902e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 59037f93cff9STheodore Ts'o es->s_free_inodes_count = 59047f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5905e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5906c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5907c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5908c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5909c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5910c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5911c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5912c92dc856SJan Kara &es->s_first_error_time_hi, 5913c92dc856SJan Kara sbi->s_first_error_time); 5914c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5915c92dc856SJan Kara sizeof(es->s_first_error_func)); 5916c92dc856SJan Kara es->s_first_error_line = 5917c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5918c92dc856SJan Kara es->s_first_error_ino = 5919c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5920c92dc856SJan Kara es->s_first_error_block = 5921c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5922c92dc856SJan Kara es->s_first_error_errcode = 5923c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5924c92dc856SJan Kara } 5925c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5926c92dc856SJan Kara &es->s_last_error_time_hi, 5927c92dc856SJan Kara sbi->s_last_error_time); 5928c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5929c92dc856SJan Kara sizeof(es->s_last_error_func)); 5930c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5931c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5932c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5933c92dc856SJan Kara es->s_last_error_errcode = 5934c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5935c92dc856SJan Kara /* 5936c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5937c92dc856SJan Kara * started already 5938c92dc856SJan Kara */ 5939c92dc856SJan Kara if (!es->s_error_count) 5940c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5941c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5942c92dc856SJan Kara sbi->s_add_error_count = 0; 5943c92dc856SJan Kara } 5944c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5945c92dc856SJan Kara 594606db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 59472d01ddc8SJan Kara unlock_buffer(sbh); 59482d01ddc8SJan Kara } 59492d01ddc8SJan Kara 59502d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 59512d01ddc8SJan Kara { 59522d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 59532d01ddc8SJan Kara int error = 0; 59542d01ddc8SJan Kara 5955f88f1466SFengnan Chang if (!sbh) 5956f88f1466SFengnan Chang return -EINVAL; 5957f88f1466SFengnan Chang if (block_device_ejected(sb)) 5958f88f1466SFengnan Chang return -ENODEV; 59592d01ddc8SJan Kara 59602d01ddc8SJan Kara ext4_update_super(sb); 59612d01ddc8SJan Kara 5962e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 59634743f839SPranay Kr. Srivastava /* 59644743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 59654743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 59664743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 59674743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 59684743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 59694743f839SPranay Kr. Srivastava * write and hope for the best. 59704743f839SPranay Kr. Srivastava */ 59714743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 59724743f839SPranay Kr. Srivastava "superblock detected"); 59734743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 59744743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 59754743f839SPranay Kr. Srivastava } 59762d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 5977ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5978564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 597900473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5980c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5981b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5982b31e1552SEric Sandeen "superblock"); 5983914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5984914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5985914258bfSTheodore Ts'o } 5986c4be0c1dSTakashi Sato return error; 5987ac27a0ecSDave Kleikamp } 5988ac27a0ecSDave Kleikamp 5989ac27a0ecSDave Kleikamp /* 5990ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5991ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5992ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5993ac27a0ecSDave Kleikamp */ 599411215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5995617ba13bSMingming Cao struct ext4_super_block *es) 5996ac27a0ecSDave Kleikamp { 599711215630SJan Kara int err; 5998617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5999ac27a0ecSDave Kleikamp 6000e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 600111215630SJan Kara if (journal != NULL) { 600211215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 600311215630SJan Kara "mounted!"); 600411215630SJan Kara return -EFSCORRUPTED; 600511215630SJan Kara } 600611215630SJan Kara return 0; 60070390131bSFrank Mayhar } 6008dab291afSMingming Cao jbd2_journal_lock_updates(journal); 600901d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 601011215630SJan Kara if (err < 0) 60117ffe1ea8SHidehiro Kawai goto out; 60127ffe1ea8SHidehiro Kawai 601302f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 601402f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 601502f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 601602f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 601702f310fcSJan Kara err = -EFSCORRUPTED; 601802f310fcSJan Kara goto out; 601902f310fcSJan Kara } 6020e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 602102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 60224392fbc4SJan Kara ext4_commit_super(sb); 6023ac27a0ecSDave Kleikamp } 60247ffe1ea8SHidehiro Kawai out: 6025dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 602611215630SJan Kara return err; 6027ac27a0ecSDave Kleikamp } 6028ac27a0ecSDave Kleikamp 6029ac27a0ecSDave Kleikamp /* 6030ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6031ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6032ac27a0ecSDave Kleikamp * main filesystem now. 6033ac27a0ecSDave Kleikamp */ 603411215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6035617ba13bSMingming Cao struct ext4_super_block *es) 6036ac27a0ecSDave Kleikamp { 6037ac27a0ecSDave Kleikamp journal_t *journal; 6038ac27a0ecSDave Kleikamp int j_errno; 6039ac27a0ecSDave Kleikamp const char *errstr; 6040ac27a0ecSDave Kleikamp 604111215630SJan Kara if (!ext4_has_feature_journal(sb)) { 604211215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 604311215630SJan Kara return -EFSCORRUPTED; 604411215630SJan Kara } 60450390131bSFrank Mayhar 6046617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6047ac27a0ecSDave Kleikamp 6048ac27a0ecSDave Kleikamp /* 6049ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6050617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6051ac27a0ecSDave Kleikamp */ 6052ac27a0ecSDave Kleikamp 6053dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6054ac27a0ecSDave Kleikamp if (j_errno) { 6055ac27a0ecSDave Kleikamp char nbuf[16]; 6056ac27a0ecSDave Kleikamp 6057617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 605812062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6059ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 606012062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6061ac27a0ecSDave Kleikamp 6062617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6063617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 60644392fbc4SJan Kara ext4_commit_super(sb); 6065ac27a0ecSDave Kleikamp 6066dab291afSMingming Cao jbd2_journal_clear_err(journal); 6067d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6068ac27a0ecSDave Kleikamp } 606911215630SJan Kara return 0; 6070ac27a0ecSDave Kleikamp } 6071ac27a0ecSDave Kleikamp 6072ac27a0ecSDave Kleikamp /* 6073ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6074ac27a0ecSDave Kleikamp * and wait on the commit. 6075ac27a0ecSDave Kleikamp */ 6076617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6077ac27a0ecSDave Kleikamp { 6078ac27a0ecSDave Kleikamp journal_t *journal; 6079ac27a0ecSDave Kleikamp 6080bc98a42cSDavid Howells if (sb_rdonly(sb)) 6081ac27a0ecSDave Kleikamp return 0; 6082ac27a0ecSDave Kleikamp 6083617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6084b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6085ac27a0ecSDave Kleikamp } 6086ac27a0ecSDave Kleikamp 6087617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6088ac27a0ecSDave Kleikamp { 608914ce0cb4STheodore Ts'o int ret = 0; 60909eddacf9SJan Kara tid_t target; 609106a407f1SDmitry Monakhov bool needs_barrier = false; 60928d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6093ac27a0ecSDave Kleikamp 609449598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 60950db1ff22STheodore Ts'o return 0; 60960db1ff22STheodore Ts'o 60979bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 60982e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6099a1177825SJan Kara /* 6100a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6101a1177825SJan Kara * no dirty dquots 6102a1177825SJan Kara */ 6103a1177825SJan Kara dquot_writeback_dquots(sb, -1); 610406a407f1SDmitry Monakhov /* 610506a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 610606a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 610706a407f1SDmitry Monakhov * transaction_commit will do it for us. 610806a407f1SDmitry Monakhov */ 6109bda32530STheodore Ts'o if (sbi->s_journal) { 611006a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 611106a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 611206a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 611306a407f1SDmitry Monakhov needs_barrier = true; 611406a407f1SDmitry Monakhov 61158d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6116ac27a0ecSDave Kleikamp if (wait) 6117bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6118bda32530STheodore Ts'o target); 61190390131bSFrank Mayhar } 6120bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6121bda32530STheodore Ts'o needs_barrier = true; 612206a407f1SDmitry Monakhov if (needs_barrier) { 612306a407f1SDmitry Monakhov int err; 6124c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 612506a407f1SDmitry Monakhov if (!ret) 612606a407f1SDmitry Monakhov ret = err; 612706a407f1SDmitry Monakhov } 612806a407f1SDmitry Monakhov 612906a407f1SDmitry Monakhov return ret; 613006a407f1SDmitry Monakhov } 613106a407f1SDmitry Monakhov 6132ac27a0ecSDave Kleikamp /* 6133ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6134ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6135be4f27d3SYongqiang Yang * 6136be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 61378e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 61388e8ad8a5SJan Kara * modifications. 6139ac27a0ecSDave Kleikamp */ 6140c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6141ac27a0ecSDave Kleikamp { 6142c4be0c1dSTakashi Sato int error = 0; 6143c4be0c1dSTakashi Sato journal_t *journal; 6144ac27a0ecSDave Kleikamp 6145bc98a42cSDavid Howells if (sb_rdonly(sb)) 61469ca92389STheodore Ts'o return 0; 61479ca92389STheodore Ts'o 6148c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6149ac27a0ecSDave Kleikamp 6150bb044576STheodore Ts'o if (journal) { 6151ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6152dab291afSMingming Cao jbd2_journal_lock_updates(journal); 61537ffe1ea8SHidehiro Kawai 61547ffe1ea8SHidehiro Kawai /* 6155bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6156bb044576STheodore Ts'o * flush the journal. 61577ffe1ea8SHidehiro Kawai */ 615801d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 61596b0310fbSEric Sandeen if (error < 0) 61606b0310fbSEric Sandeen goto out; 6161ac27a0ecSDave Kleikamp 6162ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6163e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 616402f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 616502f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6166c642dc9eSEric Sandeen } 6167c642dc9eSEric Sandeen 61684392fbc4SJan Kara error = ext4_commit_super(sb); 61696b0310fbSEric Sandeen out: 6170bb044576STheodore Ts'o if (journal) 61718e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6172bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 61736b0310fbSEric Sandeen return error; 6174ac27a0ecSDave Kleikamp } 6175ac27a0ecSDave Kleikamp 6176ac27a0ecSDave Kleikamp /* 6177ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6178ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6179ac27a0ecSDave Kleikamp */ 6180c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6181ac27a0ecSDave Kleikamp { 6182bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 61839ca92389STheodore Ts'o return 0; 61849ca92389STheodore Ts'o 6185c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 61869ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6187e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 618802f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 618902f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6190c642dc9eSEric Sandeen } 6191c642dc9eSEric Sandeen 61924392fbc4SJan Kara ext4_commit_super(sb); 6193c4be0c1dSTakashi Sato return 0; 6194ac27a0ecSDave Kleikamp } 6195ac27a0ecSDave Kleikamp 6196673c6100STheodore Ts'o /* 6197673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6198673c6100STheodore Ts'o */ 6199673c6100STheodore Ts'o struct ext4_mount_options { 6200673c6100STheodore Ts'o unsigned long s_mount_opt; 6201a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 620208cefc7aSEric W. Biederman kuid_t s_resuid; 620308cefc7aSEric W. Biederman kgid_t s_resgid; 6204673c6100STheodore Ts'o unsigned long s_commit_interval; 6205673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6206673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6207673c6100STheodore Ts'o int s_jquota_fmt; 6208a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6209673c6100STheodore Ts'o #endif 6210673c6100STheodore Ts'o }; 6211673c6100STheodore Ts'o 6212617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 6213ac27a0ecSDave Kleikamp { 6214617ba13bSMingming Cao struct ext4_super_block *es; 6215617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6216f25391ebSLukas Czerner unsigned long old_sb_flags, vfs_flags; 6217617ba13bSMingming Cao struct ext4_mount_options old_opts; 62188a266467STheodore Ts'o ext4_group_t g; 6219c5e06d10SJohann Lombardi int err = 0; 6220ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 62213bbef91bSAustin Kim int enable_quota = 0; 622203dafb5fSChen Gang int i, j; 622333458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6224ac27a0ecSDave Kleikamp #endif 6225d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 6226461c3af0SLukas Czerner struct ext4_fs_context parsed_opts; 6227b237e304SHarshad Shirwadkar 6228b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6229b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 6230ac27a0ecSDave Kleikamp 623121ac738eSChengguang Xu if (data && !orig_data) 623221ac738eSChengguang Xu return -ENOMEM; 623321ac738eSChengguang Xu 6234ac27a0ecSDave Kleikamp /* Store the original options */ 6235ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6236ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6237a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6238ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6239ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6240ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 624130773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 624230773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6243ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6244ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6245a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 624603dafb5fSChen Gang if (sbi->s_qf_names[i]) { 624733458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 624833458eabSTheodore Ts'o 624933458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 625003dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 625103dafb5fSChen Gang for (j = 0; j < i; j++) 625203dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 62533e36a163SWei Yongjun kfree(orig_data); 625403dafb5fSChen Gang return -ENOMEM; 625503dafb5fSChen Gang } 625603dafb5fSChen Gang } else 625703dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6258ac27a0ecSDave Kleikamp #endif 6259b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 6260b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = 6261b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6262ac27a0ecSDave Kleikamp 6263f25391ebSLukas Czerner /* 6264f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6265f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6266f25391ebSLukas Czerner * s_flags. Copy those selected flags from *flags to s_flags 6267f25391ebSLukas Czerner */ 6268f25391ebSLukas Czerner vfs_flags = SB_LAZYTIME | SB_I_VERSION; 6269f25391ebSLukas Czerner sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags); 6270f25391ebSLukas Czerner 6271b237e304SHarshad Shirwadkar if (!parse_options(data, sb, &parsed_opts, 1)) { 6272ac27a0ecSDave Kleikamp err = -EINVAL; 6273ac27a0ecSDave Kleikamp goto restore_opts; 6274ac27a0ecSDave Kleikamp } 6275ac27a0ecSDave Kleikamp 62766b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 62776b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 62786b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 62792d5b86e0SEric Sandeen "during remount not supported; ignoring"); 62802d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6281c6d3d56dSDarrick J. Wong } 6282c6d3d56dSDarrick J. Wong 62836ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 62846ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 62856ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62866ae6514bSPiotr Sarna "both data=journal and delalloc"); 62876ae6514bSPiotr Sarna err = -EINVAL; 62886ae6514bSPiotr Sarna goto restore_opts; 62896ae6514bSPiotr Sarna } 62906ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 62916ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62926ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 62936ae6514bSPiotr Sarna err = -EINVAL; 62946ae6514bSPiotr Sarna goto restore_opts; 62956ae6514bSPiotr Sarna } 6296ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6297ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6298ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6299ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6300ab04df78SJan Kara err = -EINVAL; 6301ab04df78SJan Kara goto restore_opts; 6302ab04df78SJan Kara } 6303923ae0ffSRoss Zwisler } 6304923ae0ffSRoss Zwisler 6305cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6306cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6307cdb7ee4cSTahsin Erdogan err = -EINVAL; 6308cdb7ee4cSTahsin Erdogan goto restore_opts; 6309cdb7ee4cSTahsin Erdogan } 6310cdb7ee4cSTahsin Erdogan 63119b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6312124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6313ac27a0ecSDave Kleikamp 63141751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 63151751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6316ac27a0ecSDave Kleikamp 6317ac27a0ecSDave Kleikamp es = sbi->s_es; 6318ac27a0ecSDave Kleikamp 6319b3881f74STheodore Ts'o if (sbi->s_journal) { 6320617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 6321b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 6322b3881f74STheodore Ts'o } 6323ac27a0ecSDave Kleikamp 6324c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6325c92dc856SJan Kara flush_work(&sbi->s_error_work); 6326c92dc856SJan Kara 63271751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 63289b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6329ac27a0ecSDave Kleikamp err = -EROFS; 6330ac27a0ecSDave Kleikamp goto restore_opts; 6331ac27a0ecSDave Kleikamp } 6332ac27a0ecSDave Kleikamp 63331751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 633438c03b34STheodore Ts'o err = sync_filesystem(sb); 633538c03b34STheodore Ts'o if (err < 0) 633638c03b34STheodore Ts'o goto restore_opts; 63370f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 63380f0dd62fSChristoph Hellwig if (err < 0) 6339c79d967dSChristoph Hellwig goto restore_opts; 6340c79d967dSChristoph Hellwig 6341ac27a0ecSDave Kleikamp /* 6342ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6343ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6344ac27a0ecSDave Kleikamp */ 63451751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6346ac27a0ecSDave Kleikamp 6347ac27a0ecSDave Kleikamp /* 6348ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6349ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6350ac27a0ecSDave Kleikamp * mark the partition as valid again. 6351ac27a0ecSDave Kleikamp */ 6352617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6353617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6354ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6355ac27a0ecSDave Kleikamp 635611215630SJan Kara if (sbi->s_journal) { 635711215630SJan Kara /* 635811215630SJan Kara * We let remount-ro finish even if marking fs 635911215630SJan Kara * as clean failed... 636011215630SJan Kara */ 6361617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 636211215630SJan Kara } 6363ac27a0ecSDave Kleikamp } else { 6364a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6365e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 63662cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6367ac27a0ecSDave Kleikamp err = -EROFS; 6368ac27a0ecSDave Kleikamp goto restore_opts; 6369ac27a0ecSDave Kleikamp } 6370ead6596bSEric Sandeen /* 63718a266467STheodore Ts'o * Make sure the group descriptor checksums 63720b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 63738a266467STheodore Ts'o */ 63748a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 63758a266467STheodore Ts'o struct ext4_group_desc *gdp = 63768a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 63778a266467STheodore Ts'o 6378feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6379b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6380b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6381e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 63828a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 63836a797d27SDarrick J. Wong err = -EFSBADCRC; 63848a266467STheodore Ts'o goto restore_opts; 63858a266467STheodore Ts'o } 63868a266467STheodore Ts'o } 63878a266467STheodore Ts'o 63888a266467STheodore Ts'o /* 6389ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6390ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6391ead6596bSEric Sandeen * require a full umount/remount for now. 6392ead6596bSEric Sandeen */ 639302f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6394b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6395ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6396ead6596bSEric Sandeen "orphan inode list. Please " 6397b31e1552SEric Sandeen "umount/remount instead"); 6398ead6596bSEric Sandeen err = -EINVAL; 6399ead6596bSEric Sandeen goto restore_opts; 6400ead6596bSEric Sandeen } 6401ead6596bSEric Sandeen 6402ac27a0ecSDave Kleikamp /* 6403ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6404ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6405ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6406ac27a0ecSDave Kleikamp * the partition.) 6407ac27a0ecSDave Kleikamp */ 640811215630SJan Kara if (sbi->s_journal) { 640911215630SJan Kara err = ext4_clear_journal_err(sb, es); 641011215630SJan Kara if (err) 641111215630SJan Kara goto restore_opts; 641211215630SJan Kara } 6413ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6414c89128a0SJaegeuk Kim 6415c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6416c89128a0SJaegeuk Kim if (err) 6417c89128a0SJaegeuk Kim goto restore_opts; 6418c89128a0SJaegeuk Kim 64191751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6420e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6421c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6422c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6423c5e06d10SJohann Lombardi err = -EROFS; 6424c5e06d10SJohann Lombardi goto restore_opts; 6425c5e06d10SJohann Lombardi } 64263bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6427c79d967dSChristoph Hellwig enable_quota = 1; 64283bbef91bSAustin Kim #endif 6429ac27a0ecSDave Kleikamp } 6430ac27a0ecSDave Kleikamp } 6431bfff6873SLukas Czerner 6432bfff6873SLukas Czerner /* 6433bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6434bfff6873SLukas Czerner * current settings 6435bfff6873SLukas Czerner */ 6436bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6437bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6438bfff6873SLukas Czerner else { 6439bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6440bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6441bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6442bfff6873SLukas Czerner } 6443bfff6873SLukas Czerner 64440f5bde1dSJan Kara /* 64450f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 64460f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 64470f5bde1dSJan Kara * succeed. 64480f5bde1dSJan Kara */ 6449dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6450d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6451d176b1f6SJan Kara if (err) 6452d176b1f6SJan Kara goto restore_opts; 64530f5bde1dSJan Kara } 6454d176b1f6SJan Kara 6455c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 64564392fbc4SJan Kara err = ext4_commit_super(sb); 6457c89128a0SJaegeuk Kim if (err) 6458c89128a0SJaegeuk Kim goto restore_opts; 6459c89128a0SJaegeuk Kim } 64600390131bSFrank Mayhar 6461ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6462ac27a0ecSDave Kleikamp /* Release old quota file names */ 6463a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6464ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 64657c319d32SAditya Kali if (enable_quota) { 64667c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 64670f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6468e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 64697c319d32SAditya Kali err = ext4_enable_quotas(sb); 647007724f98STheodore Ts'o if (err) 64717c319d32SAditya Kali goto restore_opts; 64727c319d32SAditya Kali } 64737c319d32SAditya Kali } 64747c319d32SAditya Kali #endif 6475dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 64760f5bde1dSJan Kara ext4_release_system_zone(sb); 6477d4c402d9SCurt Wohlgemuth 647861bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 647961bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 648061bb4a1cSTheodore Ts'o 6481f25391ebSLukas Czerner /* 6482f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6483f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6484f25391ebSLukas Czerner * s_flags. Copy those selected flags from s_flags to *flags 6485f25391ebSLukas Czerner */ 6486f25391ebSLukas Czerner *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags); 6487f25391ebSLukas Czerner 6488ca9b404fSRoman Anufriev ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.", 6489ca9b404fSRoman Anufriev orig_data, ext4_quota_mode(sb)); 6490d4c402d9SCurt Wohlgemuth kfree(orig_data); 6491ac27a0ecSDave Kleikamp return 0; 64920b8e58a1SAndreas Dilger 6493ac27a0ecSDave Kleikamp restore_opts: 6494ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6495ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6496a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6497ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6498ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6499ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 650030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 650130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6502dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65030f5bde1dSJan Kara ext4_release_system_zone(sb); 6504ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6505ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6506a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 650733458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 650833458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6509ac27a0ecSDave Kleikamp } 651033458eabSTheodore Ts'o synchronize_rcu(); 651133458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 651233458eabSTheodore Ts'o kfree(to_free[i]); 6513ac27a0ecSDave Kleikamp #endif 651461bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 651561bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6516d4c402d9SCurt Wohlgemuth kfree(orig_data); 6517ac27a0ecSDave Kleikamp return err; 6518ac27a0ecSDave Kleikamp } 6519ac27a0ecSDave Kleikamp 6520689c958cSLi Xi #ifdef CONFIG_QUOTA 6521689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6522689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6523689c958cSLi Xi { 6524689c958cSLi Xi struct kqid qid; 6525689c958cSLi Xi struct dquot *dquot; 6526689c958cSLi Xi u64 limit; 6527689c958cSLi Xi u64 curblock; 6528689c958cSLi Xi 6529689c958cSLi Xi qid = make_kqid_projid(projid); 6530689c958cSLi Xi dquot = dqget(sb, qid); 6531689c958cSLi Xi if (IS_ERR(dquot)) 6532689c958cSLi Xi return PTR_ERR(dquot); 65337b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6534689c958cSLi Xi 6535a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6536a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 653757c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 653857c32ea4SChengguang Xu 6539689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6540f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6541f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6542689c958cSLi Xi buf->f_blocks = limit; 6543689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6544689c958cSLi Xi (buf->f_blocks > curblock) ? 6545689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6546689c958cSLi Xi } 6547689c958cSLi Xi 6548a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6549a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6550689c958cSLi Xi if (limit && buf->f_files > limit) { 6551689c958cSLi Xi buf->f_files = limit; 6552689c958cSLi Xi buf->f_ffree = 6553689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6554689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6555689c958cSLi Xi } 6556689c958cSLi Xi 65577b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6558689c958cSLi Xi dqput(dquot); 6559689c958cSLi Xi return 0; 6560689c958cSLi Xi } 6561689c958cSLi Xi #endif 6562689c958cSLi Xi 6563617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6564ac27a0ecSDave Kleikamp { 6565ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6566617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6567617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 656827dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6569d02a9391SKazuya Mio s64 bfree; 657027dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6571ac27a0ecSDave Kleikamp 6572952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6573952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6574ac27a0ecSDave Kleikamp 6575617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6576ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6577b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 657857042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 657957042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6580d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 658157042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 658227dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 658327dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 658427dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6585ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6586ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 658752d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6588617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 65899591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 65900b8e58a1SAndreas Dilger 6591689c958cSLi Xi #ifdef CONFIG_QUOTA 6592689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6593689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6594689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6595689c958cSLi Xi #endif 6596ac27a0ecSDave Kleikamp return 0; 6597ac27a0ecSDave Kleikamp } 6598ac27a0ecSDave Kleikamp 6599ac27a0ecSDave Kleikamp 6600ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6601ac27a0ecSDave Kleikamp 6602bc8230eeSJan Kara /* 6603bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6604bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6605bc8230eeSJan Kara */ 6606ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6607ac27a0ecSDave Kleikamp { 66084c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6609ac27a0ecSDave Kleikamp } 6610ac27a0ecSDave Kleikamp 6611617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6612ac27a0ecSDave Kleikamp { 6613ac27a0ecSDave Kleikamp int ret, err; 6614ac27a0ecSDave Kleikamp handle_t *handle; 6615ac27a0ecSDave Kleikamp struct inode *inode; 6616ac27a0ecSDave Kleikamp 6617ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 66189924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6619617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6620ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6621ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6622ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6623617ba13bSMingming Cao err = ext4_journal_stop(handle); 6624ac27a0ecSDave Kleikamp if (!ret) 6625ac27a0ecSDave Kleikamp ret = err; 6626ac27a0ecSDave Kleikamp return ret; 6627ac27a0ecSDave Kleikamp } 6628ac27a0ecSDave Kleikamp 6629617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6630ac27a0ecSDave Kleikamp { 6631ac27a0ecSDave Kleikamp int ret, err; 6632ac27a0ecSDave Kleikamp handle_t *handle; 6633ac27a0ecSDave Kleikamp 66349924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6635617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6636ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6637ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6638ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6639617ba13bSMingming Cao err = ext4_journal_stop(handle); 6640ac27a0ecSDave Kleikamp if (!ret) 6641ac27a0ecSDave Kleikamp ret = err; 6642ac27a0ecSDave Kleikamp return ret; 6643ac27a0ecSDave Kleikamp } 6644ac27a0ecSDave Kleikamp 6645617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6646ac27a0ecSDave Kleikamp { 6647ac27a0ecSDave Kleikamp int ret, err; 6648ac27a0ecSDave Kleikamp handle_t *handle; 6649ac27a0ecSDave Kleikamp 66509924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6651617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 66529c3013e9SJan Kara if (IS_ERR(handle)) { 66539c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 66549c3013e9SJan Kara dquot_release(dquot); 6655ac27a0ecSDave Kleikamp return PTR_ERR(handle); 66569c3013e9SJan Kara } 6657ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6658617ba13bSMingming Cao err = ext4_journal_stop(handle); 6659ac27a0ecSDave Kleikamp if (!ret) 6660ac27a0ecSDave Kleikamp ret = err; 6661ac27a0ecSDave Kleikamp return ret; 6662ac27a0ecSDave Kleikamp } 6663ac27a0ecSDave Kleikamp 6664617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6665ac27a0ecSDave Kleikamp { 6666262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6667262b4662SJan Kara 6668f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6669ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6670617ba13bSMingming Cao return ext4_write_dquot(dquot); 6671ac27a0ecSDave Kleikamp } else { 6672ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6673ac27a0ecSDave Kleikamp } 6674ac27a0ecSDave Kleikamp } 6675ac27a0ecSDave Kleikamp 6676617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6677ac27a0ecSDave Kleikamp { 6678ac27a0ecSDave Kleikamp int ret, err; 6679ac27a0ecSDave Kleikamp handle_t *handle; 6680ac27a0ecSDave Kleikamp 6681ac27a0ecSDave Kleikamp /* Data block + inode block */ 66822b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6683ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6684ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6685ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6686617ba13bSMingming Cao err = ext4_journal_stop(handle); 6687ac27a0ecSDave Kleikamp if (!ret) 6688ac27a0ecSDave Kleikamp ret = err; 6689ac27a0ecSDave Kleikamp return ret; 6690ac27a0ecSDave Kleikamp } 6691ac27a0ecSDave Kleikamp 6692daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6693daf647d2STheodore Ts'o { 6694daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6695daf647d2STheodore Ts'o 6696daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6697daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6698daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6699daf647d2STheodore Ts'o * because the name of the lock is set using the 6700daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6701daf647d2STheodore Ts'o */ 6702daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6703daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6704daf647d2STheodore Ts'o } 6705daf647d2STheodore Ts'o 6706ac27a0ecSDave Kleikamp /* 6707ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6708ac27a0ecSDave Kleikamp */ 6709617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 67108c54ca9cSAl Viro const struct path *path) 6711ac27a0ecSDave Kleikamp { 6712ac27a0ecSDave Kleikamp int err; 6713ac27a0ecSDave Kleikamp 6714ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6715ac27a0ecSDave Kleikamp return -EINVAL; 67160623543bSJan Kara 6717ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6718d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6719ac27a0ecSDave Kleikamp return -EXDEV; 6720e0770e91SJan Kara 6721e0770e91SJan Kara /* Quota already enabled for this file? */ 6722e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6723e0770e91SJan Kara return -EBUSY; 6724e0770e91SJan Kara 67250623543bSJan Kara /* Journaling quota? */ 67260623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 67272b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6728f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6729b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6730b31e1552SEric Sandeen "Quota file not on filesystem root. " 6731b31e1552SEric Sandeen "Journaled quota will not work"); 673291389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 673391389240SJan Kara } else { 673491389240SJan Kara /* 673591389240SJan Kara * Clear the flag just in case mount options changed since 673691389240SJan Kara * last time. 673791389240SJan Kara */ 673891389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 67390623543bSJan Kara } 67400623543bSJan Kara 67410623543bSJan Kara /* 67420623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 67430623543bSJan Kara * all updates to the file when we bypass pagecache... 67440623543bSJan Kara */ 67450390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 67462b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 67470623543bSJan Kara /* 67480623543bSJan Kara * We don't need to lock updates but journal_flush() could 67490623543bSJan Kara * otherwise be livelocked... 67500623543bSJan Kara */ 67510623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 675201d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 67530623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6754f00c9e44SJan Kara if (err) 67557ffe1ea8SHidehiro Kawai return err; 67567ffe1ea8SHidehiro Kawai } 6757957153fcSJan Kara 6758daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6759daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6760957153fcSJan Kara if (err) { 6761daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6762daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6763957153fcSJan Kara } else { 6764957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6765957153fcSJan Kara handle_t *handle; 6766957153fcSJan Kara 676761a92987SJan Kara /* 676861a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 676961a92987SJan Kara * files. If this fails, we return success anyway since quotas 677061a92987SJan Kara * are already enabled and this is not a hard failure. 677161a92987SJan Kara */ 6772957153fcSJan Kara inode_lock(inode); 6773957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6774957153fcSJan Kara if (IS_ERR(handle)) 6775957153fcSJan Kara goto unlock_inode; 6776957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6777957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6778957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 67794209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6780957153fcSJan Kara ext4_journal_stop(handle); 6781957153fcSJan Kara unlock_inode: 6782957153fcSJan Kara inode_unlock(inode); 6783957153fcSJan Kara } 6784daf647d2STheodore Ts'o return err; 6785ac27a0ecSDave Kleikamp } 6786ac27a0ecSDave Kleikamp 67877c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 67887c319d32SAditya Kali unsigned int flags) 67897c319d32SAditya Kali { 67907c319d32SAditya Kali int err; 67917c319d32SAditya Kali struct inode *qf_inode; 6792a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 67937c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6794689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6795689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 67967c319d32SAditya Kali }; 67977c319d32SAditya Kali 6798e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 67997c319d32SAditya Kali 68007c319d32SAditya Kali if (!qf_inums[type]) 68017c319d32SAditya Kali return -EPERM; 68027c319d32SAditya Kali 68038a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 68047c319d32SAditya Kali if (IS_ERR(qf_inode)) { 68057c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 68067c319d32SAditya Kali return PTR_ERR(qf_inode); 68077c319d32SAditya Kali } 68087c319d32SAditya Kali 6809bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6810bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6811daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 68127212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6813daf647d2STheodore Ts'o if (err) 6814daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 681561157b24SPan Bian iput(qf_inode); 68167c319d32SAditya Kali 68177c319d32SAditya Kali return err; 68187c319d32SAditya Kali } 68197c319d32SAditya Kali 68207c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 682125c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 68227c319d32SAditya Kali { 68237c319d32SAditya Kali int type, err = 0; 6824a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 68257c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6826689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6827689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 68287c319d32SAditya Kali }; 682949da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 683049da9392SJan Kara test_opt(sb, USRQUOTA), 683149da9392SJan Kara test_opt(sb, GRPQUOTA), 683249da9392SJan Kara test_opt(sb, PRJQUOTA), 683349da9392SJan Kara }; 68347c319d32SAditya Kali 683591389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6836a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 68377c319d32SAditya Kali if (qf_inums[type]) { 68387c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 683949da9392SJan Kara DQUOT_USAGE_ENABLED | 684049da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 68417c319d32SAditya Kali if (err) { 68427c319d32SAditya Kali ext4_warning(sb, 684372ba7450STheodore Ts'o "Failed to enable quota tracking " 684472ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 684572ba7450STheodore Ts'o "e2fsck to fix.", type, err); 68467f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 68477f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 68487f144fd0SJunichi Uekawa 68497c319d32SAditya Kali return err; 68507c319d32SAditya Kali } 68517c319d32SAditya Kali } 68527c319d32SAditya Kali } 68537c319d32SAditya Kali return 0; 68547c319d32SAditya Kali } 68557c319d32SAditya Kali 6856ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6857ca0e05e4SDmitry Monakhov { 685821f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 685921f97697SJan Kara handle_t *handle; 6860957153fcSJan Kara int err; 686121f97697SJan Kara 686287009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 686387009d86SDmitry Monakhov * Caller already holds s_umount sem */ 686487009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6865ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6866ca0e05e4SDmitry Monakhov 6867957153fcSJan Kara if (!inode || !igrab(inode)) 68680b268590SAmir Goldstein goto out; 68690b268590SAmir Goldstein 6870957153fcSJan Kara err = dquot_quota_off(sb, type); 6871964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6872957153fcSJan Kara goto out_put; 6873957153fcSJan Kara 6874957153fcSJan Kara inode_lock(inode); 687561a92987SJan Kara /* 687661a92987SJan Kara * Update modification times of quota files when userspace can 687761a92987SJan Kara * start looking at them. If we fail, we return success anyway since 687861a92987SJan Kara * this is not a hard failure and quotas are already disabled. 687961a92987SJan Kara */ 68809924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 68814209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 68824209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6883957153fcSJan Kara goto out_unlock; 68844209ae12SHarshad Shirwadkar } 6885957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6886957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6887eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 68884209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 688921f97697SJan Kara ext4_journal_stop(handle); 6890957153fcSJan Kara out_unlock: 6891957153fcSJan Kara inode_unlock(inode); 6892957153fcSJan Kara out_put: 6893964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6894957153fcSJan Kara iput(inode); 6895957153fcSJan Kara return err; 689621f97697SJan Kara out: 6897ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6898ca0e05e4SDmitry Monakhov } 6899ca0e05e4SDmitry Monakhov 6900ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6901ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6902ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6903ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6904617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6905ac27a0ecSDave Kleikamp size_t len, loff_t off) 6906ac27a0ecSDave Kleikamp { 6907ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6908725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6909ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6910ac27a0ecSDave Kleikamp int tocopy; 6911ac27a0ecSDave Kleikamp size_t toread; 6912ac27a0ecSDave Kleikamp struct buffer_head *bh; 6913ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6914ac27a0ecSDave Kleikamp 6915ac27a0ecSDave Kleikamp if (off > i_size) 6916ac27a0ecSDave Kleikamp return 0; 6917ac27a0ecSDave Kleikamp if (off+len > i_size) 6918ac27a0ecSDave Kleikamp len = i_size-off; 6919ac27a0ecSDave Kleikamp toread = len; 6920ac27a0ecSDave Kleikamp while (toread > 0) { 6921ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6922ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 69231c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 69241c215028STheodore Ts'o if (IS_ERR(bh)) 69251c215028STheodore Ts'o return PTR_ERR(bh); 6926ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6927ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6928ac27a0ecSDave Kleikamp else 6929ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6930ac27a0ecSDave Kleikamp brelse(bh); 6931ac27a0ecSDave Kleikamp offset = 0; 6932ac27a0ecSDave Kleikamp toread -= tocopy; 6933ac27a0ecSDave Kleikamp data += tocopy; 6934ac27a0ecSDave Kleikamp blk++; 6935ac27a0ecSDave Kleikamp } 6936ac27a0ecSDave Kleikamp return len; 6937ac27a0ecSDave Kleikamp } 6938ac27a0ecSDave Kleikamp 6939ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6940ac27a0ecSDave Kleikamp * enough credits) */ 6941617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6942ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6943ac27a0ecSDave Kleikamp { 6944ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6945725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 69464209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6947c5e298aeSTheodore Ts'o int retries = 0; 6948ac27a0ecSDave Kleikamp struct buffer_head *bh; 6949ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6950ac27a0ecSDave Kleikamp 69510390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 6952b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6953b31e1552SEric Sandeen " cancelled because transaction is not started", 69549c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 69559c3013e9SJan Kara return -EIO; 69569c3013e9SJan Kara } 695767eeb568SDmitry Monakhov /* 695867eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 695967eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 696067eeb568SDmitry Monakhov */ 696167eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 696267eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 696367eeb568SDmitry Monakhov " cancelled because not block aligned", 696467eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 696567eeb568SDmitry Monakhov return -EIO; 696667eeb568SDmitry Monakhov } 696767eeb568SDmitry Monakhov 6968c5e298aeSTheodore Ts'o do { 6969c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6970c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6971c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 697245586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6973c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 69741c215028STheodore Ts'o if (IS_ERR(bh)) 69751c215028STheodore Ts'o return PTR_ERR(bh); 6976ac27a0ecSDave Kleikamp if (!bh) 6977ac27a0ecSDave Kleikamp goto out; 69785d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6979188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 6980ac27a0ecSDave Kleikamp if (err) { 6981ac27a0ecSDave Kleikamp brelse(bh); 69821c215028STheodore Ts'o return err; 6983ac27a0ecSDave Kleikamp } 6984ac27a0ecSDave Kleikamp lock_buffer(bh); 698567eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6986ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6987ac27a0ecSDave Kleikamp unlock_buffer(bh); 69880390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6989ac27a0ecSDave Kleikamp brelse(bh); 6990ac27a0ecSDave Kleikamp out: 699167eeb568SDmitry Monakhov if (inode->i_size < off + len) { 699267eeb568SDmitry Monakhov i_size_write(inode, off + len); 6993617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 69944209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 69954209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 69964209ae12SHarshad Shirwadkar err = err2; 699721f97697SJan Kara } 69984209ae12SHarshad Shirwadkar return err ? err : len; 6999ac27a0ecSDave Kleikamp } 7000ac27a0ecSDave Kleikamp #endif 7001ac27a0ecSDave Kleikamp 7002152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 7003152a0836SAl Viro const char *dev_name, void *data) 7004ac27a0ecSDave Kleikamp { 7005152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 7006ac27a0ecSDave Kleikamp } 7007ac27a0ecSDave Kleikamp 7008c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 700924b58424STheodore Ts'o static inline void register_as_ext2(void) 701024b58424STheodore Ts'o { 701124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 701224b58424STheodore Ts'o if (err) 701324b58424STheodore Ts'o printk(KERN_WARNING 701424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 701524b58424STheodore Ts'o } 701624b58424STheodore Ts'o 701724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 701824b58424STheodore Ts'o { 701924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 702024b58424STheodore Ts'o } 70212035e776STheodore Ts'o 70222035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 70232035e776STheodore Ts'o { 7024e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 70252035e776STheodore Ts'o return 0; 7026bc98a42cSDavid Howells if (sb_rdonly(sb)) 70272035e776STheodore Ts'o return 1; 7028e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 70292035e776STheodore Ts'o return 0; 70302035e776STheodore Ts'o return 1; 70312035e776STheodore Ts'o } 703224b58424STheodore Ts'o #else 703324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 703424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 70352035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 703624b58424STheodore Ts'o #endif 703724b58424STheodore Ts'o 703824b58424STheodore Ts'o static inline void register_as_ext3(void) 703924b58424STheodore Ts'o { 704024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 704124b58424STheodore Ts'o if (err) 704224b58424STheodore Ts'o printk(KERN_WARNING 704324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 704424b58424STheodore Ts'o } 704524b58424STheodore Ts'o 704624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 704724b58424STheodore Ts'o { 704824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 704924b58424STheodore Ts'o } 70502035e776STheodore Ts'o 70512035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 70522035e776STheodore Ts'o { 7053e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 70542035e776STheodore Ts'o return 0; 7055e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 70562035e776STheodore Ts'o return 0; 7057bc98a42cSDavid Howells if (sb_rdonly(sb)) 70582035e776STheodore Ts'o return 1; 7059e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 70602035e776STheodore Ts'o return 0; 70612035e776STheodore Ts'o return 1; 70622035e776STheodore Ts'o } 706324b58424STheodore Ts'o 706403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7065ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 706603010a33STheodore Ts'o .name = "ext4", 7067152a0836SAl Viro .mount = ext4_mount, 7068ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 706914f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7070ac27a0ecSDave Kleikamp }; 70717f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7072ac27a0ecSDave Kleikamp 7073e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7074e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7075e9e3bcecSEric Sandeen 70765dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7077ac27a0ecSDave Kleikamp { 7078e9e3bcecSEric Sandeen int i, err; 7079c9de560dSAlex Tomas 7080e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 708107c0c5d8SAl Viro ext4_li_info = NULL; 708207c0c5d8SAl Viro 70839a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 708412e9b892SDmitry Monakhov ext4_check_flag_values(); 7085e9e3bcecSEric Sandeen 7086e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7087e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7088e9e3bcecSEric Sandeen 708951865fdaSZheng Liu err = ext4_init_es(); 70906fd058f7STheodore Ts'o if (err) 70916fd058f7STheodore Ts'o return err; 709251865fdaSZheng Liu 70931dc0aa46SEric Whitney err = ext4_init_pending(); 70941dc0aa46SEric Whitney if (err) 709522cfe4b4SEric Biggers goto out7; 709622cfe4b4SEric Biggers 709722cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 709822cfe4b4SEric Biggers if (err) 70991dc0aa46SEric Whitney goto out6; 71001dc0aa46SEric Whitney 710151865fdaSZheng Liu err = ext4_init_pageio(); 710251865fdaSZheng Liu if (err) 7103b5799018STheodore Ts'o goto out5; 710451865fdaSZheng Liu 71055dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7106bd2d0210STheodore Ts'o if (err) 7107b5799018STheodore Ts'o goto out4; 7108857ac889SLukas Czerner 7109b5799018STheodore Ts'o err = ext4_init_sysfs(); 7110dd68314cSTheodore Ts'o if (err) 7111b5799018STheodore Ts'o goto out3; 7112857ac889SLukas Czerner 71135dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7114ac27a0ecSDave Kleikamp if (err) 7115c9de560dSAlex Tomas goto out2; 7116ac27a0ecSDave Kleikamp err = init_inodecache(); 7117ac27a0ecSDave Kleikamp if (err) 7118ac27a0ecSDave Kleikamp goto out1; 7119aa75f4d3SHarshad Shirwadkar 7120aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7121aa75f4d3SHarshad Shirwadkar if (err) 7122aa75f4d3SHarshad Shirwadkar goto out05; 7123aa75f4d3SHarshad Shirwadkar 712424b58424STheodore Ts'o register_as_ext3(); 71252035e776STheodore Ts'o register_as_ext2(); 712603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7127ac27a0ecSDave Kleikamp if (err) 7128ac27a0ecSDave Kleikamp goto out; 7129bfff6873SLukas Czerner 7130ac27a0ecSDave Kleikamp return 0; 7131ac27a0ecSDave Kleikamp out: 713224b58424STheodore Ts'o unregister_as_ext2(); 713324b58424STheodore Ts'o unregister_as_ext3(); 7134aa75f4d3SHarshad Shirwadkar out05: 7135ac27a0ecSDave Kleikamp destroy_inodecache(); 7136ac27a0ecSDave Kleikamp out1: 71375dabfc78STheodore Ts'o ext4_exit_mballoc(); 71389c191f70ST Makphaibulchoke out2: 7139b5799018STheodore Ts'o ext4_exit_sysfs(); 7140b5799018STheodore Ts'o out3: 7141dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7142b5799018STheodore Ts'o out4: 71435dabfc78STheodore Ts'o ext4_exit_pageio(); 7144b5799018STheodore Ts'o out5: 714522cfe4b4SEric Biggers ext4_exit_post_read_processing(); 71461dc0aa46SEric Whitney out6: 714722cfe4b4SEric Biggers ext4_exit_pending(); 714822cfe4b4SEric Biggers out7: 714951865fdaSZheng Liu ext4_exit_es(); 715051865fdaSZheng Liu 7151ac27a0ecSDave Kleikamp return err; 7152ac27a0ecSDave Kleikamp } 7153ac27a0ecSDave Kleikamp 71545dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7155ac27a0ecSDave Kleikamp { 7156bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 715724b58424STheodore Ts'o unregister_as_ext2(); 715824b58424STheodore Ts'o unregister_as_ext3(); 715903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7160ac27a0ecSDave Kleikamp destroy_inodecache(); 71615dabfc78STheodore Ts'o ext4_exit_mballoc(); 7162b5799018STheodore Ts'o ext4_exit_sysfs(); 71635dabfc78STheodore Ts'o ext4_exit_system_zone(); 71645dabfc78STheodore Ts'o ext4_exit_pageio(); 716522cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7166dd12ed14SEric Sandeen ext4_exit_es(); 71671dc0aa46SEric Whitney ext4_exit_pending(); 7168ac27a0ecSDave Kleikamp } 7169ac27a0ecSDave Kleikamp 7170ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 717183982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7172ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 71737ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 71745dabfc78STheodore Ts'o module_init(ext4_init_fs) 71755dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7176