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); 91*4c94bff9SLukas Czerner static int ext4_validate_options(struct super_block *sb); 92ac27a0ecSDave Kleikamp 93e74031fdSJan Kara /* 94e74031fdSJan Kara * Lock ordering 95e74031fdSJan Kara * 96e74031fdSJan Kara * page fault path: 97d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 98d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 99e74031fdSJan Kara * 100e74031fdSJan Kara * buffered write path: 101c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 102e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 103e74031fdSJan Kara * i_data_sem (rw) 104e74031fdSJan Kara * 105e74031fdSJan Kara * truncate: 106d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 107d4f5258eSJan Kara * page lock 108d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1091d39834fSNikolay Borisov * i_data_sem (rw) 110e74031fdSJan Kara * 111e74031fdSJan Kara * direct IO: 112c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1131d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 114e74031fdSJan Kara * 115e74031fdSJan Kara * writepages: 116e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 117e74031fdSJan Kara */ 118e74031fdSJan Kara 119c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1202035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1212035e776STheodore Ts'o .owner = THIS_MODULE, 1222035e776STheodore Ts'o .name = "ext2", 1232035e776STheodore Ts'o .mount = ext4_mount, 1242035e776STheodore Ts'o .kill_sb = kill_block_super, 1252035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1262035e776STheodore Ts'o }; 1277f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 128fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1292035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1302035e776STheodore Ts'o #else 1312035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1322035e776STheodore Ts'o #endif 1332035e776STheodore Ts'o 1342035e776STheodore Ts'o 135ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 136ba69f9abSJan Kara .owner = THIS_MODULE, 137ba69f9abSJan Kara .name = "ext3", 138152a0836SAl Viro .mount = ext4_mount, 139ba69f9abSJan Kara .kill_sb = kill_block_super, 140ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 141ba69f9abSJan Kara }; 1427f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 143fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 144ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 145bd81d8eeSLaurent Vivier 146fa491b14Szhangyi (F) 147fa491b14Szhangyi (F) static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags, 148fa491b14Szhangyi (F) bh_end_io_t *end_io) 149fa491b14Szhangyi (F) { 150fb265c9cSTheodore Ts'o /* 151fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 152fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 153fa491b14Szhangyi (F) * recheck the buffer contents. 154fa491b14Szhangyi (F) */ 155fa491b14Szhangyi (F) clear_buffer_verified(bh); 156fa491b14Szhangyi (F) 157fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 158fa491b14Szhangyi (F) get_bh(bh); 159fa491b14Szhangyi (F) submit_bh(REQ_OP_READ, op_flags, bh); 160fa491b14Szhangyi (F) } 161fa491b14Szhangyi (F) 162fa491b14Szhangyi (F) void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 163fa491b14Szhangyi (F) bh_end_io_t *end_io) 164fa491b14Szhangyi (F) { 165fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 166fa491b14Szhangyi (F) 167fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 168fa491b14Szhangyi (F) unlock_buffer(bh); 169fa491b14Szhangyi (F) return; 170fa491b14Szhangyi (F) } 171fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 172fa491b14Szhangyi (F) } 173fa491b14Szhangyi (F) 174fa491b14Szhangyi (F) int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io) 175fa491b14Szhangyi (F) { 176fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 177fa491b14Szhangyi (F) 178fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 179fa491b14Szhangyi (F) unlock_buffer(bh); 180fa491b14Szhangyi (F) return 0; 181fa491b14Szhangyi (F) } 182fa491b14Szhangyi (F) 183fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 184fa491b14Szhangyi (F) 185fa491b14Szhangyi (F) wait_on_buffer(bh); 186fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 187fa491b14Szhangyi (F) return 0; 188fa491b14Szhangyi (F) return -EIO; 189fa491b14Szhangyi (F) } 190fa491b14Szhangyi (F) 191fa491b14Szhangyi (F) int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait) 192fa491b14Szhangyi (F) { 193fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 194fa491b14Szhangyi (F) if (wait) 195fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 196fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 197fa491b14Szhangyi (F) return 0; 198fa491b14Szhangyi (F) } 199fa491b14Szhangyi (F) if (wait) { 200fa491b14Szhangyi (F) wait_on_buffer(bh); 201fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 202fa491b14Szhangyi (F) return 0; 203fa491b14Szhangyi (F) return -EIO; 204fa491b14Szhangyi (F) } 205fa491b14Szhangyi (F) return 0; 206fa491b14Szhangyi (F) } 207fa491b14Szhangyi (F) 208fb265c9cSTheodore Ts'o /* 2098394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 210fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 211fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 212fb265c9cSTheodore Ts'o * return. 213fb265c9cSTheodore Ts'o */ 2148394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 2158394a6abSzhangyi (F) sector_t block, int op_flags, 2168394a6abSzhangyi (F) gfp_t gfp) 217fb265c9cSTheodore Ts'o { 2182d069c08Szhangyi (F) struct buffer_head *bh; 2192d069c08Szhangyi (F) int ret; 220fb265c9cSTheodore Ts'o 2218394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 222fb265c9cSTheodore Ts'o if (bh == NULL) 223fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 224cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 225fb265c9cSTheodore Ts'o return bh; 2262d069c08Szhangyi (F) 2272d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2282d069c08Szhangyi (F) if (ret) { 229fb265c9cSTheodore Ts'o put_bh(bh); 2302d069c08Szhangyi (F) return ERR_PTR(ret); 2312d069c08Szhangyi (F) } 2322d069c08Szhangyi (F) return bh; 233fb265c9cSTheodore Ts'o } 234fb265c9cSTheodore Ts'o 2358394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 2368394a6abSzhangyi (F) int op_flags) 2378394a6abSzhangyi (F) { 2388394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2398394a6abSzhangyi (F) } 2408394a6abSzhangyi (F) 2418394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2428394a6abSzhangyi (F) sector_t block) 2438394a6abSzhangyi (F) { 2448394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2458394a6abSzhangyi (F) } 2468394a6abSzhangyi (F) 2475df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2485df1d412Szhangyi (F) { 2495df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2505df1d412Szhangyi (F) 2515df1d412Szhangyi (F) if (likely(bh)) { 2525df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2535df1d412Szhangyi (F) brelse(bh); 2545df1d412Szhangyi (F) } 255c197855eSStephen Hemminger } 256a9c47317SDarrick J. Wong 257a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2589aa5d32bSDmitry Monakhov struct ext4_super_block *es) 259a9c47317SDarrick J. Wong { 260a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 261a9c47317SDarrick J. Wong return 1; 262a9c47317SDarrick J. Wong 263a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 26406db49e6STheodore Ts'o } 265a9c47317SDarrick J. Wong 26606db49e6STheodore Ts'o static __le32 ext4_superblock_csum(struct super_block *sb, 26706db49e6STheodore Ts'o struct ext4_super_block *es) 2689aa5d32bSDmitry Monakhov { 269a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 270a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 271a9c47317SDarrick J. Wong __u32 csum; 272a9c47317SDarrick J. Wong 273a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 2749933fc0aSTheodore Ts'o 2759933fc0aSTheodore Ts'o return cpu_to_le32(csum); 2769933fc0aSTheodore Ts'o } 2779933fc0aSTheodore Ts'o 2788be04b93SJoe Perches static int ext4_superblock_csum_verify(struct super_block *sb, 2799933fc0aSTheodore Ts'o struct ext4_super_block *es) 2809933fc0aSTheodore Ts'o { 2819933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2829933fc0aSTheodore Ts'o return 1; 2839933fc0aSTheodore Ts'o 2849933fc0aSTheodore Ts'o return es->s_checksum == ext4_superblock_csum(sb, es); 2859933fc0aSTheodore Ts'o } 2869933fc0aSTheodore Ts'o 2879933fc0aSTheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 2888be04b93SJoe Perches { 2899933fc0aSTheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2909933fc0aSTheodore Ts'o 2919933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2929933fc0aSTheodore Ts'o return; 2939933fc0aSTheodore Ts'o 2948fadc143SAlexandre Ratchov es->s_checksum = ext4_superblock_csum(sb, es); 2958fadc143SAlexandre Ratchov } 296bd81d8eeSLaurent Vivier 297bd81d8eeSLaurent Vivier ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 298bd81d8eeSLaurent Vivier struct ext4_group_desc *bg) 299bd81d8eeSLaurent Vivier { 3003a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3018fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3028fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 303bd81d8eeSLaurent Vivier } 304bd81d8eeSLaurent Vivier 3058fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3068fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 307bd81d8eeSLaurent Vivier { 3085272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3098fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3108fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 311bd81d8eeSLaurent Vivier } 312bd81d8eeSLaurent Vivier 3138fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3148fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 315bd81d8eeSLaurent Vivier { 3165272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3178fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3188fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 319bd81d8eeSLaurent Vivier } 320bd81d8eeSLaurent Vivier 321021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 322560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 323560671a0SAneesh Kumar K.V { 324560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 325560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 326560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 327560671a0SAneesh Kumar K.V } 328560671a0SAneesh Kumar K.V 329560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 330560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 331560671a0SAneesh Kumar K.V { 332560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 333560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 334560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 335560671a0SAneesh Kumar K.V } 336560671a0SAneesh Kumar K.V 337560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 338560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 339560671a0SAneesh Kumar K.V { 340560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 341560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 342560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 343560671a0SAneesh Kumar K.V } 344560671a0SAneesh Kumar K.V 345560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 346560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 347560671a0SAneesh Kumar K.V { 348560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 349560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 350560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 351560671a0SAneesh Kumar K.V } 352560671a0SAneesh Kumar K.V 3538fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3548fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 355bd81d8eeSLaurent Vivier { 3563a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3578fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3588fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 359bd81d8eeSLaurent Vivier } 360bd81d8eeSLaurent Vivier 3618fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3628fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 363bd81d8eeSLaurent Vivier { 3645272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3658fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3668fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 367bd81d8eeSLaurent Vivier } 368bd81d8eeSLaurent Vivier 3698fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3708fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 371bd81d8eeSLaurent Vivier { 3725272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3738fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3748fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 375bd81d8eeSLaurent Vivier } 376bd81d8eeSLaurent Vivier 377021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 378560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 379560671a0SAneesh Kumar K.V { 380560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 381560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 382560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 383560671a0SAneesh Kumar K.V } 384560671a0SAneesh Kumar K.V 385560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 386560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 387560671a0SAneesh Kumar K.V { 388560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 389560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 390560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 391560671a0SAneesh Kumar K.V } 392560671a0SAneesh Kumar K.V 393560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 394560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 395560671a0SAneesh Kumar K.V { 396560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 397560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 398560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 399560671a0SAneesh Kumar K.V } 400560671a0SAneesh Kumar K.V 401560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 402560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 403560671a0SAneesh Kumar K.V { 404560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 405560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 406560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 407560671a0SAneesh Kumar K.V } 408560671a0SAneesh Kumar K.V 409c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4106a0678a7SArnd Bergmann { 4116a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4126a0678a7SArnd Bergmann 4136a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4146a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4156a0678a7SArnd Bergmann } 4166a0678a7SArnd Bergmann 4176a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4186a0678a7SArnd Bergmann { 4196a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4206a0678a7SArnd Bergmann } 4216a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 422c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 423c92dc856SJan Kara ktime_get_real_seconds()) 4246a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4256a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 426d3d1faf6SCurt Wohlgemuth 427bdfe0cbdSTheodore Ts'o /* 428bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 429bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 430bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 431bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 432bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 433bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 434bdfe0cbdSTheodore Ts'o */ 435bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 436bdfe0cbdSTheodore Ts'o { 437bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 438bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 439bdfe0cbdSTheodore Ts'o 440bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 441bdfe0cbdSTheodore Ts'o } 442bdfe0cbdSTheodore Ts'o 44318aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 44418aadd47SBobi Jam { 44518aadd47SBobi Jam struct super_block *sb = journal->j_private; 44618aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 44718aadd47SBobi Jam int error = is_journal_aborted(journal); 4485d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 44918aadd47SBobi Jam 4505d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 451a0154344SDaeho Jeong 452a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 453a0154344SDaeho Jeong 45418aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4555d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4565d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4575d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 45818aadd47SBobi Jam list_del_init(&jce->jce_list); 45918aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46018aadd47SBobi Jam jce->jce_func(sb, jce, error); 46118aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 46218aadd47SBobi Jam } 46318aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46418aadd47SBobi Jam } 4651c13d5c0STheodore Ts'o 466afb585a9SMauricio Faria de Oliveira /* 467afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 468afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 469afb585a9SMauricio Faria de Oliveira * 470afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 471afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 472afb585a9SMauricio Faria de Oliveira * to write protect the pages. 473afb585a9SMauricio Faria de Oliveira * 474afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 475afb585a9SMauricio Faria de Oliveira */ 476afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 477afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 478afb585a9SMauricio Faria de Oliveira void *data) 479afb585a9SMauricio Faria de Oliveira { 480afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 481afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 482afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 483afb585a9SMauricio Faria de Oliveira 484afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 485afb585a9SMauricio Faria de Oliveira do { 486afb585a9SMauricio Faria de Oliveira /* 487afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 488afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 489afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 490afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 491afb585a9SMauricio Faria de Oliveira * properly. 492afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 493afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 494afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 495afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 496afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 497afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 498afb585a9SMauricio Faria de Oliveira */ 499afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 500afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 501afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 502afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 503afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 504afb585a9SMauricio Faria de Oliveira goto out; 505afb585a9SMauricio Faria de Oliveira } 506afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 507afb585a9SMauricio Faria de Oliveira 508afb585a9SMauricio Faria de Oliveira out: 509afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 510afb585a9SMauricio Faria de Oliveira } 511afb585a9SMauricio Faria de Oliveira 512afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 513afb585a9SMauricio Faria de Oliveira { 514afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 515afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 516afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 517afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 518afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 519afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 520afb585a9SMauricio Faria de Oliveira }; 521afb585a9SMauricio Faria de Oliveira 522afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 523afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 524afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 525afb585a9SMauricio Faria de Oliveira } 526afb585a9SMauricio Faria de Oliveira 527afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 528afb585a9SMauricio Faria de Oliveira { 529afb585a9SMauricio Faria de Oliveira int ret; 530afb585a9SMauricio Faria de Oliveira 531afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 532afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 533afb585a9SMauricio Faria de Oliveira else 534afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 535afb585a9SMauricio Faria de Oliveira 536afb585a9SMauricio Faria de Oliveira return ret; 537afb585a9SMauricio Faria de Oliveira } 538afb585a9SMauricio Faria de Oliveira 539afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 540afb585a9SMauricio Faria de Oliveira { 541afb585a9SMauricio Faria de Oliveira int ret = 0; 542afb585a9SMauricio Faria de Oliveira 543afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 544afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 545afb585a9SMauricio Faria de Oliveira 546afb585a9SMauricio Faria de Oliveira return ret; 547afb585a9SMauricio Faria de Oliveira } 548afb585a9SMauricio Faria de Oliveira 5491dc1097fSJan Kara static bool system_going_down(void) 5501dc1097fSJan Kara { 5511dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5521dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5531dc1097fSJan Kara } 5541dc1097fSJan Kara 55502a7780eSJan Kara struct ext4_err_translation { 55602a7780eSJan Kara int code; 55702a7780eSJan Kara int errno; 55802a7780eSJan Kara }; 55902a7780eSJan Kara 56002a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 56102a7780eSJan Kara 56202a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 56302a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 56402a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 56502a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 56602a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 56702a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 56802a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 56902a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 57002a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 57102a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 57202a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 57302a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 57402a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 57502a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 57602a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 57702a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 57902a7780eSJan Kara }; 58002a7780eSJan Kara 58102a7780eSJan Kara static int ext4_errno_to_code(int errno) 58202a7780eSJan Kara { 58302a7780eSJan Kara int i; 58402a7780eSJan Kara 58502a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 58602a7780eSJan Kara if (err_translation[i].errno == errno) 58702a7780eSJan Kara return err_translation[i].code; 58802a7780eSJan Kara return EXT4_ERR_UNKNOWN; 58902a7780eSJan Kara } 59002a7780eSJan Kara 5912d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 59240676623SJan Kara __u32 ino, __u64 block, 59340676623SJan Kara const char *func, unsigned int line) 59440676623SJan Kara { 595c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 59640676623SJan Kara 59702a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 59802a7780eSJan Kara if (error == 0) 59902a7780eSJan Kara error = EFSCORRUPTED; 600c92dc856SJan Kara 601c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 602c92dc856SJan Kara sbi->s_add_error_count++; 603c92dc856SJan Kara sbi->s_last_error_code = error; 604c92dc856SJan Kara sbi->s_last_error_line = line; 605c92dc856SJan Kara sbi->s_last_error_ino = ino; 606c92dc856SJan Kara sbi->s_last_error_block = block; 607c92dc856SJan Kara sbi->s_last_error_func = func; 608c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 609c92dc856SJan Kara if (!sbi->s_first_error_time) { 610c92dc856SJan Kara sbi->s_first_error_code = error; 611c92dc856SJan Kara sbi->s_first_error_line = line; 612c92dc856SJan Kara sbi->s_first_error_ino = ino; 613c92dc856SJan Kara sbi->s_first_error_block = block; 614c92dc856SJan Kara sbi->s_first_error_func = func; 615c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 61640676623SJan Kara } 617c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 61840676623SJan Kara } 61940676623SJan Kara 620ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 621ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 622ac27a0ecSDave Kleikamp * 623ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 624617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 625ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 626ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 627ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 628ac27a0ecSDave Kleikamp * write out the superblock safely. 629ac27a0ecSDave Kleikamp * 630dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 631d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 632ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 633014c9caaSJan Kara * 634014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 635014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 636014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 637014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 638014c9caaSJan Kara * at a critical moment in log management. 639ac27a0ecSDave Kleikamp */ 640e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 641e789ca0cSJan Kara __u32 ino, __u64 block, 642e789ca0cSJan Kara const char *func, unsigned int line) 643ac27a0ecSDave Kleikamp { 644b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6452d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 646b08070ecSJan Kara 647e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 648327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 649327eaf73STheodore Ts'o WARN_ON_ONCE(1); 650327eaf73STheodore Ts'o 6512d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6529b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 653ac27a0ecSDave Kleikamp if (journal) 654dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6552d01ddc8SJan Kara } 6562d01ddc8SJan Kara 6572d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6582d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6592d01ddc8SJan Kara /* 6602d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6612d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6622d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6632d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6642d01ddc8SJan Kara */ 665bb9464e0Syangerkun if (continue_fs && journal) 6662d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6672d01ddc8SJan Kara else 6682d01ddc8SJan Kara ext4_commit_super(sb); 6692d01ddc8SJan Kara } 6702d01ddc8SJan Kara 6711dc1097fSJan Kara /* 6721dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6731dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6741dc1097fSJan Kara * disabled. 6751dc1097fSJan Kara */ 676014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 677617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 678ac27a0ecSDave Kleikamp sb->s_id); 679ac27a0ecSDave Kleikamp } 680ac2f7ca5SYe Bin 681ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 682ac2f7ca5SYe Bin return; 683ac2f7ca5SYe Bin 684014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 685014c9caaSJan Kara /* 686014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 687014c9caaSJan Kara * ->s_flags update 688014c9caaSJan Kara */ 689014c9caaSJan Kara smp_wmb(); 690014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 6914327ba52SDaeho Jeong } 692ac27a0ecSDave Kleikamp 693c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 694c92dc856SJan Kara { 695c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 696c92dc856SJan Kara s_error_work); 6972d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 6982d01ddc8SJan Kara handle_t *handle; 699c92dc856SJan Kara 7002d01ddc8SJan Kara /* 7012d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7022d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7032d01ddc8SJan Kara * updates. 7042d01ddc8SJan Kara * 7052d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7062d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7072d01ddc8SJan Kara */ 7082d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 709558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7102d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7112d01ddc8SJan Kara if (IS_ERR(handle)) 7122d01ddc8SJan Kara goto write_directly; 713558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7142d01ddc8SJan Kara jbd2_journal_stop(handle); 7152d01ddc8SJan Kara goto write_directly; 7162d01ddc8SJan Kara } 7172d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 718558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 719558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 720558d6450SYe Bin "superblock detected"); 721558d6450SYe Bin clear_buffer_write_io_error(sbh); 722558d6450SYe Bin set_buffer_uptodate(sbh); 723558d6450SYe Bin } 724558d6450SYe Bin 725558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7262d01ddc8SJan Kara jbd2_journal_stop(handle); 7272d01ddc8SJan Kara goto write_directly; 7282d01ddc8SJan Kara } 7292d01ddc8SJan Kara jbd2_journal_stop(handle); 730d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7312d01ddc8SJan Kara return; 7322d01ddc8SJan Kara } 7332d01ddc8SJan Kara write_directly: 7342d01ddc8SJan Kara /* 7352d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7362d01ddc8SJan Kara * out and hope for the best. 7372d01ddc8SJan Kara */ 7384392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 739d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 740ac27a0ecSDave Kleikamp } 741ac27a0ecSDave Kleikamp 742efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 743efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 744efbed4dcSTheodore Ts'o "EXT4-fs error") 745efbed4dcSTheodore Ts'o 74612062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 747014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 74854d3adbcSTheodore Ts'o const char *fmt, ...) 749ac27a0ecSDave Kleikamp { 7500ff2ea7dSJoe Perches struct va_format vaf; 751ac27a0ecSDave Kleikamp va_list args; 752ac27a0ecSDave Kleikamp 7530db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7540db1ff22STheodore Ts'o return; 7550db1ff22STheodore Ts'o 756ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 757efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 758ac27a0ecSDave Kleikamp va_start(args, fmt); 7590ff2ea7dSJoe Perches vaf.fmt = fmt; 7600ff2ea7dSJoe Perches vaf.va = &args; 761efbed4dcSTheodore Ts'o printk(KERN_CRIT 762efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7630ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 764ac27a0ecSDave Kleikamp va_end(args); 765efbed4dcSTheodore Ts'o } 7669a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7679a089b21SGabriel Krisman Bertazi 768e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 769ac27a0ecSDave Kleikamp } 770ac27a0ecSDave Kleikamp 771e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 77254d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 773273df556SFrank Mayhar const char *fmt, ...) 774273df556SFrank Mayhar { 775273df556SFrank Mayhar va_list args; 776f7c21177STheodore Ts'o struct va_format vaf; 777273df556SFrank Mayhar 7780db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7790db1ff22STheodore Ts'o return; 7800db1ff22STheodore Ts'o 781ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 782efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 783273df556SFrank Mayhar va_start(args, fmt); 784f7c21177STheodore Ts'o vaf.fmt = fmt; 785f7c21177STheodore Ts'o vaf.va = &args; 786c398eda0STheodore Ts'o if (block) 787d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 788d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 789d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 790d9ee81daSJoe Perches block, current->comm, &vaf); 791d9ee81daSJoe Perches else 792d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 793d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 794d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 795d9ee81daSJoe Perches current->comm, &vaf); 796273df556SFrank Mayhar va_end(args); 797efbed4dcSTheodore Ts'o } 7989a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 7999a089b21SGabriel Krisman Bertazi 800e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 80154d3adbcSTheodore Ts'o function, line); 802273df556SFrank Mayhar } 803273df556SFrank Mayhar 804e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 805f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 806f7c21177STheodore Ts'o const char *fmt, ...) 807273df556SFrank Mayhar { 808273df556SFrank Mayhar va_list args; 809f7c21177STheodore Ts'o struct va_format vaf; 810496ad9aaSAl Viro struct inode *inode = file_inode(file); 811273df556SFrank Mayhar char pathname[80], *path; 812273df556SFrank Mayhar 8130db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8140db1ff22STheodore Ts'o return; 8150db1ff22STheodore Ts'o 816ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 817efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8189bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 819f9a62d09SDan Carpenter if (IS_ERR(path)) 820273df556SFrank Mayhar path = "(unknown)"; 821f7c21177STheodore Ts'o va_start(args, fmt); 822f7c21177STheodore Ts'o vaf.fmt = fmt; 823f7c21177STheodore Ts'o vaf.va = &args; 824d9ee81daSJoe Perches if (block) 825d9ee81daSJoe Perches printk(KERN_CRIT 826d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 827d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 828d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 829d9ee81daSJoe Perches block, current->comm, path, &vaf); 830d9ee81daSJoe Perches else 831d9ee81daSJoe Perches printk(KERN_CRIT 832d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 833d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 834d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 835d9ee81daSJoe Perches current->comm, path, &vaf); 836273df556SFrank Mayhar va_end(args); 837efbed4dcSTheodore Ts'o } 8389a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8399a089b21SGabriel Krisman Bertazi 840e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 84154d3adbcSTheodore Ts'o function, line); 842273df556SFrank Mayhar } 843273df556SFrank Mayhar 844722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 845ac27a0ecSDave Kleikamp char nbuf[16]) 846ac27a0ecSDave Kleikamp { 847ac27a0ecSDave Kleikamp char *errstr = NULL; 848ac27a0ecSDave Kleikamp 849ac27a0ecSDave Kleikamp switch (errno) { 8506a797d27SDarrick J. Wong case -EFSCORRUPTED: 8516a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8526a797d27SDarrick J. Wong break; 8536a797d27SDarrick J. Wong case -EFSBADCRC: 8546a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8556a797d27SDarrick J. Wong break; 856ac27a0ecSDave Kleikamp case -EIO: 857ac27a0ecSDave Kleikamp errstr = "IO failure"; 858ac27a0ecSDave Kleikamp break; 859ac27a0ecSDave Kleikamp case -ENOMEM: 860ac27a0ecSDave Kleikamp errstr = "Out of memory"; 861ac27a0ecSDave Kleikamp break; 862ac27a0ecSDave Kleikamp case -EROFS: 86378f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 86478f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 865ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 866ac27a0ecSDave Kleikamp else 867ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 868ac27a0ecSDave Kleikamp break; 869ac27a0ecSDave Kleikamp default: 870ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 871ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 872ac27a0ecSDave Kleikamp * NULL. */ 873ac27a0ecSDave Kleikamp if (nbuf) { 874ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 875ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 876ac27a0ecSDave Kleikamp errstr = nbuf; 877ac27a0ecSDave Kleikamp } 878ac27a0ecSDave Kleikamp break; 879ac27a0ecSDave Kleikamp } 880ac27a0ecSDave Kleikamp 881ac27a0ecSDave Kleikamp return errstr; 882ac27a0ecSDave Kleikamp } 883ac27a0ecSDave Kleikamp 884617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 885ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 886ac27a0ecSDave Kleikamp 887c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 888c398eda0STheodore Ts'o unsigned int line, int errno) 889ac27a0ecSDave Kleikamp { 890ac27a0ecSDave Kleikamp char nbuf[16]; 891ac27a0ecSDave Kleikamp const char *errstr; 892ac27a0ecSDave Kleikamp 8930db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 8940db1ff22STheodore Ts'o return; 8950db1ff22STheodore Ts'o 896ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 897ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 898ac27a0ecSDave Kleikamp * an error. */ 899bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 900ac27a0ecSDave Kleikamp return; 901ac27a0ecSDave Kleikamp 902efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 903617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 904c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 905c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 906efbed4dcSTheodore Ts'o } 9079a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 908ac27a0ecSDave Kleikamp 909e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 910ac27a0ecSDave Kleikamp } 911ac27a0ecSDave Kleikamp 912e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 913e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 914b31e1552SEric Sandeen { 9150ff2ea7dSJoe Perches struct va_format vaf; 916b31e1552SEric Sandeen va_list args; 917b31e1552SEric Sandeen 9181cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 919efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 920efbed4dcSTheodore Ts'o return; 921efbed4dcSTheodore Ts'o 922b31e1552SEric Sandeen va_start(args, fmt); 9230ff2ea7dSJoe Perches vaf.fmt = fmt; 9240ff2ea7dSJoe Perches vaf.va = &args; 9250ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 926b31e1552SEric Sandeen va_end(args); 927b31e1552SEric Sandeen } 928b31e1552SEric Sandeen 9291cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9301cf006edSDmitry Monakhov { 9311cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9321cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9331cf006edSDmitry Monakhov "EXT4-fs warning"); 9341cf006edSDmitry Monakhov } 935b03a2f7eSAndreas Dilger 93612062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 937c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 938ac27a0ecSDave Kleikamp { 9390ff2ea7dSJoe Perches struct va_format vaf; 940ac27a0ecSDave Kleikamp va_list args; 941ac27a0ecSDave Kleikamp 942b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 943efbed4dcSTheodore Ts'o return; 944efbed4dcSTheodore Ts'o 945ac27a0ecSDave Kleikamp va_start(args, fmt); 9460ff2ea7dSJoe Perches vaf.fmt = fmt; 9470ff2ea7dSJoe Perches vaf.va = &args; 9480ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9490ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 950ac27a0ecSDave Kleikamp va_end(args); 951ac27a0ecSDave Kleikamp } 952ac27a0ecSDave Kleikamp 953b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 954b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 955b03a2f7eSAndreas Dilger { 956b03a2f7eSAndreas Dilger struct va_format vaf; 957b03a2f7eSAndreas Dilger va_list args; 958b03a2f7eSAndreas Dilger 959b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 960b03a2f7eSAndreas Dilger return; 961b03a2f7eSAndreas Dilger 962b03a2f7eSAndreas Dilger va_start(args, fmt); 963b03a2f7eSAndreas Dilger vaf.fmt = fmt; 964b03a2f7eSAndreas Dilger vaf.va = &args; 965b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 966b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 967b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 968b03a2f7eSAndreas Dilger va_end(args); 969b03a2f7eSAndreas Dilger } 970b03a2f7eSAndreas Dilger 971e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 972e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 973e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 974e29136f8STheodore Ts'o const char *fmt, ...) 9755d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9765d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9775d1b1b3fSAneesh Kumar K.V { 9780ff2ea7dSJoe Perches struct va_format vaf; 9795d1b1b3fSAneesh Kumar K.V va_list args; 9805d1b1b3fSAneesh Kumar K.V 9810db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9820db1ff22STheodore Ts'o return; 9830db1ff22STheodore Ts'o 984ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 985efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 9865d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 9870ff2ea7dSJoe Perches vaf.fmt = fmt; 9880ff2ea7dSJoe Perches vaf.va = &args; 98921149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 990e29136f8STheodore Ts'o sb->s_id, function, line, grp); 991e29136f8STheodore Ts'o if (ino) 9920ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 993e29136f8STheodore Ts'o if (block) 994efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 995efbed4dcSTheodore Ts'o (unsigned long long) block); 9960ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 9975d1b1b3fSAneesh Kumar K.V va_end(args); 998efbed4dcSTheodore Ts'o } 9995d1b1b3fSAneesh Kumar K.V 1000c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1001327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1002327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1003e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10042d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10052d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10062d01ddc8SJan Kara line); 1007c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10082d01ddc8SJan Kara } 10095d1b1b3fSAneesh Kumar K.V return; 10105d1b1b3fSAneesh Kumar K.V } 10115d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1012e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10135d1b1b3fSAneesh Kumar K.V /* 10145d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10155d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10165d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10175d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10185d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 101925985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10205d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10215d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10225d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10235d1b1b3fSAneesh Kumar K.V */ 10245d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10255d1b1b3fSAneesh Kumar K.V return; 10265d1b1b3fSAneesh Kumar K.V } 10275d1b1b3fSAneesh Kumar K.V 1028db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1029db79e6d1SWang Shilong ext4_group_t group, 1030db79e6d1SWang Shilong unsigned int flags) 1031db79e6d1SWang Shilong { 1032db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1033db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1034db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10359af0b3d1SWang Shilong int ret; 1036db79e6d1SWang Shilong 10379af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10389af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10399af0b3d1SWang Shilong &grp->bb_state); 10409af0b3d1SWang Shilong if (!ret) 1041db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1042db79e6d1SWang Shilong grp->bb_free); 1043db79e6d1SWang Shilong } 1044db79e6d1SWang Shilong 10459af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10469af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10479af0b3d1SWang Shilong &grp->bb_state); 10489af0b3d1SWang Shilong if (!ret && gdp) { 1049db79e6d1SWang Shilong int count; 1050db79e6d1SWang Shilong 1051db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1052db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1053db79e6d1SWang Shilong count); 1054db79e6d1SWang Shilong } 1055db79e6d1SWang Shilong } 1056db79e6d1SWang Shilong } 1057db79e6d1SWang Shilong 1058617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1059ac27a0ecSDave Kleikamp { 1060617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1061ac27a0ecSDave Kleikamp 1062617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1063ac27a0ecSDave Kleikamp return; 1064ac27a0ecSDave Kleikamp 106512062dddSEric Sandeen ext4_warning(sb, 1066ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1067ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1068617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1069ac27a0ecSDave Kleikamp 1070617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1071617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1072617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1073ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1074ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1075ac27a0ecSDave Kleikamp 1076ac27a0ecSDave Kleikamp /* 1077ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1078ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1079ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1080ac27a0ecSDave Kleikamp */ 1081ac27a0ecSDave Kleikamp } 1082ac27a0ecSDave Kleikamp 1083ac27a0ecSDave Kleikamp /* 1084ac27a0ecSDave Kleikamp * Open the external journal device 1085ac27a0ecSDave Kleikamp */ 1086b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1087ac27a0ecSDave Kleikamp { 1088ac27a0ecSDave Kleikamp struct block_device *bdev; 1089ac27a0ecSDave Kleikamp 1090d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1091ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1092ac27a0ecSDave Kleikamp goto fail; 1093ac27a0ecSDave Kleikamp return bdev; 1094ac27a0ecSDave Kleikamp 1095ac27a0ecSDave Kleikamp fail: 1096ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1097ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1098ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1099ac27a0ecSDave Kleikamp return NULL; 1100ac27a0ecSDave Kleikamp } 1101ac27a0ecSDave Kleikamp 1102ac27a0ecSDave Kleikamp /* 1103ac27a0ecSDave Kleikamp * Release the journal device 1104ac27a0ecSDave Kleikamp */ 11054385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1106ac27a0ecSDave Kleikamp { 11074385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1108ac27a0ecSDave Kleikamp } 1109ac27a0ecSDave Kleikamp 11104385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1111ac27a0ecSDave Kleikamp { 1112ac27a0ecSDave Kleikamp struct block_device *bdev; 1113ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1114ac27a0ecSDave Kleikamp if (bdev) { 11154385bab1SAl Viro ext4_blkdev_put(bdev); 1116ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1117ac27a0ecSDave Kleikamp } 1118ac27a0ecSDave Kleikamp } 1119ac27a0ecSDave Kleikamp 1120ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1121ac27a0ecSDave Kleikamp { 1122617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1123ac27a0ecSDave Kleikamp } 1124ac27a0ecSDave Kleikamp 1125617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1126ac27a0ecSDave Kleikamp { 1127ac27a0ecSDave Kleikamp struct list_head *l; 1128ac27a0ecSDave Kleikamp 1129b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1130ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1131ac27a0ecSDave Kleikamp 1132ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1133ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1134ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1135ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1136ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1137ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1138ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1139ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1140ac27a0ecSDave Kleikamp } 1141ac27a0ecSDave Kleikamp } 1142ac27a0ecSDave Kleikamp 1143957153fcSJan Kara #ifdef CONFIG_QUOTA 1144957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1145957153fcSJan Kara 1146957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1147957153fcSJan Kara { 1148957153fcSJan Kara int type; 1149957153fcSJan Kara 1150957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1151957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1152957153fcSJan Kara ext4_quota_off(sb, type); 1153957153fcSJan Kara } 115433458eabSTheodore Ts'o 115533458eabSTheodore Ts'o /* 115633458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 115733458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 115833458eabSTheodore Ts'o */ 115933458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 116033458eabSTheodore Ts'o struct ext4_sb_info *sbi, 116133458eabSTheodore Ts'o int type) 116233458eabSTheodore Ts'o { 116333458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 116433458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 116533458eabSTheodore Ts'o } 1166957153fcSJan Kara #else 1167957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1168957153fcSJan Kara { 1169957153fcSJan Kara } 1170957153fcSJan Kara #endif 1171957153fcSJan Kara 1172617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1173ac27a0ecSDave Kleikamp { 1174617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1175617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11761d0c3924STheodore Ts'o struct buffer_head **group_desc; 11777c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 117897abd7d4STheodore Ts'o int aborted = 0; 1179ef2cabf7SHidehiro Kawai int i, err; 1180ac27a0ecSDave Kleikamp 1181857ac889SLukas Czerner ext4_unregister_li_request(sb); 1182957153fcSJan Kara ext4_quota_off_umount(sb); 1183e0ccfd95SChristoph Hellwig 1184c92dc856SJan Kara flush_work(&sbi->s_error_work); 11852e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 118602f310fcSJan Kara ext4_release_orphan_info(sb); 11874c0425ffSMingming Cao 11885e47868fSRitesh Harjani /* 11895e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 11905e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 11915e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 11925e47868fSRitesh Harjani */ 11935e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 11945e47868fSRitesh Harjani 11950390131bSFrank Mayhar if (sbi->s_journal) { 119697abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1197ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 119847b4a50bSJan Kara sbi->s_journal = NULL; 1199878520acSTheodore Ts'o if ((err < 0) && !aborted) { 120054d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12010390131bSFrank Mayhar } 1202878520acSTheodore Ts'o } 1203d4edac31SJosef Bacik 1204d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12059105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1206d4edac31SJosef Bacik ext4_release_system_zone(sb); 1207d4edac31SJosef Bacik ext4_mb_release(sb); 1208d4edac31SJosef Bacik ext4_ext_release(sb); 1209d4edac31SJosef Bacik 1210bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1211e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 121202f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1213ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1214ac27a0ecSDave Kleikamp } 1215bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12164392fbc4SJan Kara ext4_commit_super(sb); 1217a8e25a83SArtem Bityutskiy 12181d0c3924STheodore Ts'o rcu_read_lock(); 12191d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1220ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12211d0c3924STheodore Ts'o brelse(group_desc[i]); 12221d0c3924STheodore Ts'o kvfree(group_desc); 12237c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12247c990728SSuraj Jitindar Singh if (flex_groups) { 12257c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12267c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12277c990728SSuraj Jitindar Singh kvfree(flex_groups); 12287c990728SSuraj Jitindar Singh } 12291d0c3924STheodore Ts'o rcu_read_unlock(); 123057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1231ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1232ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 123357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1234efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1235bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1236ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1237a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 123833458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1239ac27a0ecSDave Kleikamp #endif 1240ac27a0ecSDave Kleikamp 1241ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1242ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1243ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1244ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1245ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1246ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1247837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1248ac27a0ecSDave Kleikamp 124989d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1250f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1251ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1252ac27a0ecSDave Kleikamp /* 1253ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1254ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1255ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1256ac27a0ecSDave Kleikamp */ 1257ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1258ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1259617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1260ac27a0ecSDave Kleikamp } 126150c15df6SChengguang Xu 1262dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1263dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 126450c15df6SChengguang Xu 126547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 126647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 126750c15df6SChengguang Xu 1268618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1269618f0031SPavel Skripkin 12709060dd2cSEric Sandeen brelse(sbi->s_sbh); 1271ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12723197ebdbSTheodore Ts'o /* 12733197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12743197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12753197ebdbSTheodore Ts'o */ 12763197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12773197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 12780441984aSDarrick J. Wong if (sbi->s_chksum_driver) 12790441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1280705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 12815e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1282ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 1283c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1284f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1285c83ad55eSGabriel Krisman Bertazi #endif 1286ac27a0ecSDave Kleikamp kfree(sbi); 1287ac27a0ecSDave Kleikamp } 1288ac27a0ecSDave Kleikamp 1289e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1290ac27a0ecSDave Kleikamp 1291ac27a0ecSDave Kleikamp /* 1292ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1293ac27a0ecSDave Kleikamp */ 1294617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1295ac27a0ecSDave Kleikamp { 1296617ba13bSMingming Cao struct ext4_inode_info *ei; 1297ac27a0ecSDave Kleikamp 1298e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1299ac27a0ecSDave Kleikamp if (!ei) 1300ac27a0ecSDave Kleikamp return NULL; 13010b8e58a1SAndreas Dilger 1302ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1303202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1304c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 130527bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1306c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13079a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13089a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1309edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1310eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1311edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1312dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1313d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1314d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13151dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1316a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1317a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 131896c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1319a9e7f447SDmitry Monakhov #endif 13208aefcd55STheodore Ts'o ei->jinode = NULL; 13212e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1322744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1323b436b9beSJan Kara ei->i_sync_tid = 0; 1324b436b9beSJan Kara ei->i_datasync_tid = 0; 1325e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13262e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1327aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1328aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1329ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1330ac27a0ecSDave Kleikamp } 1331ac27a0ecSDave Kleikamp 13327ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13337ff9c073STheodore Ts'o { 13347ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13357ff9c073STheodore Ts'o 133629b3692eSEric Biggers if (!drop) 133729b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 133829b3692eSEric Biggers 13397ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13407ff9c073STheodore Ts'o return drop; 13417ff9c073STheodore Ts'o } 13427ff9c073STheodore Ts'o 134394053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1344fa0d7e3dSNick Piggin { 13452c58d548SEric Biggers fscrypt_free_inode(inode); 1346aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1347aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1348aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1349aa75f4d3SHarshad Shirwadkar } 1350fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1351fa0d7e3dSNick Piggin } 1352fa0d7e3dSNick Piggin 1353617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1354ac27a0ecSDave Kleikamp { 13559f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1356b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1357b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1358b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13599f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13609f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13619f7dd93dSVasily Averin true); 13629f7dd93dSVasily Averin dump_stack(); 13639f7dd93dSVasily Averin } 13646fed8395SJeffle Xu 13656fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13666fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13676fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13686fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13696fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1370ac27a0ecSDave Kleikamp } 1371ac27a0ecSDave Kleikamp 137251cc5068SAlexey Dobriyan static void init_once(void *foo) 1373ac27a0ecSDave Kleikamp { 1374617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1375ac27a0ecSDave Kleikamp 1376ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1377ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 13780e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1379ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1380aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1381ac27a0ecSDave Kleikamp } 1382ac27a0ecSDave Kleikamp 1383e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1384ac27a0ecSDave Kleikamp { 1385f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1386f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1387f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1388f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1389f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1390f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 139120c2df83SPaul Mundt init_once); 1392617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1393ac27a0ecSDave Kleikamp return -ENOMEM; 1394ac27a0ecSDave Kleikamp return 0; 1395ac27a0ecSDave Kleikamp } 1396ac27a0ecSDave Kleikamp 1397ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1398ac27a0ecSDave Kleikamp { 13998c0a8537SKirill A. Shutemov /* 14008c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14018c0a8537SKirill A. Shutemov * destroy cache. 14028c0a8537SKirill A. Shutemov */ 14038c0a8537SKirill A. Shutemov rcu_barrier(); 1404617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1405ac27a0ecSDave Kleikamp } 1406ac27a0ecSDave Kleikamp 14070930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1408ac27a0ecSDave Kleikamp { 1409aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14100930fcc1SAl Viro invalidate_inode_buffers(inode); 1411dbd5768fSJan Kara clear_inode(inode); 141227bc446eSbrookxu ext4_discard_preallocations(inode, 0); 141351865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1414f4c2d372SJan Kara dquot_drop(inode); 14158aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14168aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14178aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14188aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14198aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14208aefcd55STheodore Ts'o } 14213d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1422c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1423ac27a0ecSDave Kleikamp } 1424ac27a0ecSDave Kleikamp 14251b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14261b961ac0SChristoph Hellwig u64 ino, u32 generation) 1427ac27a0ecSDave Kleikamp { 1428ac27a0ecSDave Kleikamp struct inode *inode; 1429ac27a0ecSDave Kleikamp 14308a363970STheodore Ts'o /* 1431ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1432ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1433ac27a0ecSDave Kleikamp */ 14348a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14351d1fe1eeSDavid Howells if (IS_ERR(inode)) 14361d1fe1eeSDavid Howells return ERR_CAST(inode); 14371d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1438ac27a0ecSDave Kleikamp iput(inode); 1439ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1440ac27a0ecSDave Kleikamp } 14411b961ac0SChristoph Hellwig 14421b961ac0SChristoph Hellwig return inode; 1443ac27a0ecSDave Kleikamp } 14441b961ac0SChristoph Hellwig 14451b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14461b961ac0SChristoph Hellwig int fh_len, int fh_type) 14471b961ac0SChristoph Hellwig { 14481b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14491b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14501b961ac0SChristoph Hellwig } 14511b961ac0SChristoph Hellwig 14521b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14531b961ac0SChristoph Hellwig int fh_len, int fh_type) 14541b961ac0SChristoph Hellwig { 14551b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14561b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1457ac27a0ecSDave Kleikamp } 1458ac27a0ecSDave Kleikamp 1459fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1460fde87268STheodore Ts'o { 1461fde87268STheodore Ts'o struct writeback_control wbc = { 1462fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1463fde87268STheodore Ts'o }; 1464fde87268STheodore Ts'o 1465fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1466fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1467fde87268STheodore Ts'o } 1468fde87268STheodore Ts'o 1469643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1470a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1471a7550b30SJaegeuk Kim { 1472a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1473a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1474a7550b30SJaegeuk Kim } 1475a7550b30SJaegeuk Kim 1476a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1477a7550b30SJaegeuk Kim void *fs_data) 1478a7550b30SJaegeuk Kim { 14792f8f5e76SEric Biggers handle_t *handle = fs_data; 1480c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1481a7550b30SJaegeuk Kim 14829ce0151aSEric Biggers /* 14839ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 14849ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 14859ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 14869ce0151aSEric Biggers * the filename "lost+found" itself. 14879ce0151aSEric Biggers */ 14889ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 14899ce0151aSEric Biggers return -EPERM; 1490a7550b30SJaegeuk Kim 14917d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 14927d3e06a8SRoss Zwisler return -EINVAL; 14937d3e06a8SRoss Zwisler 1494b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1495b383a73fSIra Weiny return -EOPNOTSUPP; 1496b383a73fSIra Weiny 149794840e3cSEric Biggers res = ext4_convert_inline_data(inode); 149894840e3cSEric Biggers if (res) 149994840e3cSEric Biggers return res; 150094840e3cSEric Biggers 15012f8f5e76SEric Biggers /* 15022f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 15032f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 15042f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15052f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15062f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15072f8f5e76SEric Biggers */ 15082f8f5e76SEric Biggers 15092f8f5e76SEric Biggers if (handle) { 15102f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15112f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15122f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15132f8f5e76SEric Biggers ctx, len, 0); 1514a7550b30SJaegeuk Kim if (!res) { 1515a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1516a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1517a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1518a3caa24bSJan Kara /* 15192ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15202ee6a576SEric Biggers * S_DAX may be disabled 1521a3caa24bSJan Kara */ 1522043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1523a7550b30SJaegeuk Kim } 1524a7550b30SJaegeuk Kim return res; 1525a7550b30SJaegeuk Kim } 1526a7550b30SJaegeuk Kim 1527b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1528b8cb5a54STahsin Erdogan if (res) 1529b8cb5a54STahsin Erdogan return res; 15302f8f5e76SEric Biggers retry: 1531af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1532af65207cSTahsin Erdogan &credits); 1533dec214d0STahsin Erdogan if (res) 1534dec214d0STahsin Erdogan return res; 1535dec214d0STahsin Erdogan 1536c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1537a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1538a7550b30SJaegeuk Kim return PTR_ERR(handle); 1539a7550b30SJaegeuk Kim 15402f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15412f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15422f8f5e76SEric Biggers ctx, len, 0); 1543a7550b30SJaegeuk Kim if (!res) { 1544a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15452ee6a576SEric Biggers /* 15462ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15472ee6a576SEric Biggers * S_DAX may be disabled 15482ee6a576SEric Biggers */ 1549043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1550a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1551a7550b30SJaegeuk Kim if (res) 1552a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1553a7550b30SJaegeuk Kim } 1554a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15552f8f5e76SEric Biggers 15562f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15572f8f5e76SEric Biggers goto retry; 1558a7550b30SJaegeuk Kim if (!res) 1559a7550b30SJaegeuk Kim res = res2; 1560a7550b30SJaegeuk Kim return res; 1561a7550b30SJaegeuk Kim } 1562a7550b30SJaegeuk Kim 1563ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1564a7550b30SJaegeuk Kim { 1565ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1566a7550b30SJaegeuk Kim } 1567a7550b30SJaegeuk Kim 1568b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1569b925acb8SEric Biggers { 1570b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1571b925acb8SEric Biggers } 1572b925acb8SEric Biggers 1573b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1574b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1575b925acb8SEric Biggers { 1576b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1577b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1578b925acb8SEric Biggers } 1579b925acb8SEric Biggers 15806f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1581a5d431efSEric Biggers .key_prefix = "ext4:", 1582a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1583a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1584ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1585a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1586b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1587b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1588a7550b30SJaegeuk Kim }; 1589a7550b30SJaegeuk Kim #endif 1590a7550b30SJaegeuk Kim 1591ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1592d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1593689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1594ac27a0ecSDave Kleikamp 1595617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1596617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1597617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1598617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1599617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 16006f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 16018c54ca9cSAl Viro const struct path *path); 1602617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1603ac27a0ecSDave Kleikamp size_t len, loff_t off); 1604617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1605ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16067c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16077c319d32SAditya Kali unsigned int flags); 1608ac27a0ecSDave Kleikamp 160996c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 161096c7e0d9SJan Kara { 161196c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 161296c7e0d9SJan Kara } 161396c7e0d9SJan Kara 161461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 161560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1616617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1617617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1618617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1619617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1620a5b5ee32SJan Kara .write_info = ext4_write_info, 1621a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1622a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1623040cb378SLi Xi .get_projid = ext4_get_projid, 16247a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1625ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1626ac27a0ecSDave Kleikamp }; 1627ac27a0ecSDave Kleikamp 16280d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1629617ba13bSMingming Cao .quota_on = ext4_quota_on, 1630ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1631287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16320a240339SJan Kara .get_state = dquot_get_state, 1633287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1634287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16356332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16366332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1637ac27a0ecSDave Kleikamp }; 1638ac27a0ecSDave Kleikamp #endif 1639ac27a0ecSDave Kleikamp 1640ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1641617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 164294053139SAl Viro .free_inode = ext4_free_in_core_inode, 1643617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1644617ba13bSMingming Cao .write_inode = ext4_write_inode, 1645617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16467ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16470930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1648617ba13bSMingming Cao .put_super = ext4_put_super, 1649617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1650c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1651c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1652617ba13bSMingming Cao .statfs = ext4_statfs, 1653617ba13bSMingming Cao .remount_fs = ext4_remount, 1654617ba13bSMingming Cao .show_options = ext4_show_options, 1655ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1656617ba13bSMingming Cao .quota_read = ext4_quota_read, 1657617ba13bSMingming Cao .quota_write = ext4_quota_write, 165896c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1659ac27a0ecSDave Kleikamp #endif 1660ac27a0ecSDave Kleikamp }; 1661ac27a0ecSDave Kleikamp 166239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16631b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16641b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1665617ba13bSMingming Cao .get_parent = ext4_get_parent, 1666fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1667ac27a0ecSDave Kleikamp }; 1668ac27a0ecSDave Kleikamp 1669ac27a0ecSDave Kleikamp enum { 1670ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1671ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 167272578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1673ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 167472578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1675ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1676ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1677ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16786ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16794f74d15fSEric Biggers Opt_inlinecrypt, 1680ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 16815a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1682ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16839cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 16849cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1685327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1686327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1687670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 16881449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16895328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1690744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1691fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1692cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 169321175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1694e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 16958016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 169699c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16978016e29fSHarshad Shirwadkar #endif 1698ac27a0ecSDave Kleikamp }; 1699ac27a0ecSDave Kleikamp 1700e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1701e5a185c2SLukas Czerner {"continue", Opt_err_cont}, 1702e5a185c2SLukas Czerner {"panic", Opt_err_panic}, 1703e5a185c2SLukas Czerner {"remount-ro", Opt_err_ro}, 1704e5a185c2SLukas Czerner {} 1705e5a185c2SLukas Czerner }; 1706e5a185c2SLukas Czerner 1707e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1708e5a185c2SLukas Czerner {"journal", Opt_data_journal}, 1709e5a185c2SLukas Czerner {"ordered", Opt_data_ordered}, 1710e5a185c2SLukas Czerner {"writeback", Opt_data_writeback}, 1711e5a185c2SLukas Czerner {} 1712e5a185c2SLukas Czerner }; 1713e5a185c2SLukas Czerner 1714e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1715e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1716e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1717e5a185c2SLukas Czerner {} 1718e5a185c2SLukas Czerner }; 1719e5a185c2SLukas Czerner 1720e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1721e5a185c2SLukas Czerner {"vfsold", Opt_jqfmt_vfsold}, 1722e5a185c2SLukas Czerner {"vfsv0", Opt_jqfmt_vfsv0}, 1723e5a185c2SLukas Czerner {"vfsv1", Opt_jqfmt_vfsv1}, 1724e5a185c2SLukas Czerner {} 1725e5a185c2SLukas Czerner }; 1726e5a185c2SLukas Czerner 1727e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1728e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1729e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1730e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1731e5a185c2SLukas Czerner {} 1732e5a185c2SLukas Czerner }; 1733e5a185c2SLukas Czerner 1734e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1735e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1736e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1737e5a185c2SLukas Czerner 1738e5a185c2SLukas Czerner /* 1739e5a185c2SLukas Czerner * Mount option specification 1740e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1741e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1742e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1743e5a185c2SLukas Czerner * separate for now. 1744e5a185c2SLukas Czerner */ 1745e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1746e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1747e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1748e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1749e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1750e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1751e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1752e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1753e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1754e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1755e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1756e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1757e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1758e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1759e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1760e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1761e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1762e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1763e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1764e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1765e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1766e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1767e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1768e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1769e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1770e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1771e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1772e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1773e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1774e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1775e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1776e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1777e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1778e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1779e5a185c2SLukas Czerner ext4_param_data_err), 1780e5a185c2SLukas Czerner fsparam_string_empty 1781e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1782e5a185c2SLukas Czerner fsparam_string_empty 1783e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1784e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1785e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1786e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1787e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1788e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1789e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1790e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1791e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1792e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1793e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1794e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1795e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1796e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1797e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1798e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1799e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1800e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1801e5a185c2SLukas Czerner fsparam_flag ("lazytime", Opt_lazytime), 1802e5a185c2SLukas Czerner fsparam_flag ("nolazytime", Opt_nolazytime), 1803e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1804e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1805e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1806e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1807e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1808e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1809e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1810e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1811e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1812e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1813e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1814e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1815e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1816e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1817e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1818e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1819e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1820e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1821e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1822e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1823e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1824e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1825e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1826e5a185c2SLukas Czerner #endif 1827e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1828e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1829e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1830e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1831e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1832e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1833e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1834e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1835e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1836e5a185c2SLukas Czerner Opt_removed), 1837e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1838e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1839e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1840e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1841e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1842e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1843e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1844e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1845e5a185c2SLukas Czerner {} 1846e5a185c2SLukas Czerner }; 1847e5a185c2SLukas Czerner 1848a447c093SSteven Whitehouse static const match_table_t tokens = { 1849ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1850ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1851ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1852ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1853ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1854ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1855ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1856ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1857ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1858ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1859ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1860ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1861ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1862ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 186372578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 186472578c33STheodore Ts'o {Opt_removed, "orlov"}, 1865ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1866ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1867ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1868ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1869e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 18705a916be1STheodore Ts'o {Opt_noload, "noload"}, 187172578c33STheodore Ts'o {Opt_removed, "nobh"}, 187272578c33STheodore Ts'o {Opt_removed, "bh"}, 1873ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 187430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 187530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1876ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1877ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1878818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1879c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1880818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1881ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1882ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1883ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1884ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 18855bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 18865bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1887ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1888ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1889ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1890ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1891ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1892ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 18935a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1894ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1895ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1896ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1897ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 189849da9392SJan Kara {Opt_prjquota, "prjquota"}, 1899ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 190006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 190106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 190225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1903923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 19049cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 19059cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 19069cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1907c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 190864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1909327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1910327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1911a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1912a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1913670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1914dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 191536ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 191636ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 19176fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 19186fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1919240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1920b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1921afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 192206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 192306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1924744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1925244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1926744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 19275328e635SEric Sandeen {Opt_discard, "discard"}, 19285328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1929fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1930fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1931fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 19328016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 193399c880deSHarshad Shirwadkar {Opt_fc_debug_force, "fc_debug_force"}, 19348016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"}, 19358016e29fSHarshad Shirwadkar #endif 1936df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1937ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 19386ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 19394f74d15fSEric Biggers {Opt_inlinecrypt, "inlinecrypt"}, 1940cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1941cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 194221175ca4SHarshad Shirwadkar {Opt_removed, "prefetch_block_bitmaps"}, 194321175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, 1944196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, 1945c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1946c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1947c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1948c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1949c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1950f3f12faaSJosef Bacik {Opt_err, NULL}, 1951ac27a0ecSDave Kleikamp }; 1952ac27a0ecSDave Kleikamp 1953617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1954ac27a0ecSDave Kleikamp { 1955617ba13bSMingming Cao ext4_fsblk_t sb_block; 1956ac27a0ecSDave Kleikamp char *options = (char *) *data; 1957ac27a0ecSDave Kleikamp 1958ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1959ac27a0ecSDave Kleikamp return 1; /* Default location */ 19600b8e58a1SAndreas Dilger 1961ac27a0ecSDave Kleikamp options += 3; 19620b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1963ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1964ac27a0ecSDave Kleikamp if (*options && *options != ',') { 19654776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1966ac27a0ecSDave Kleikamp (char *) *data); 1967ac27a0ecSDave Kleikamp return 1; 1968ac27a0ecSDave Kleikamp } 1969ac27a0ecSDave Kleikamp if (*options == ',') 1970ac27a0ecSDave Kleikamp options++; 1971ac27a0ecSDave Kleikamp *data = (void *) options; 19720b8e58a1SAndreas Dilger 1973ac27a0ecSDave Kleikamp return sb_block; 1974ac27a0ecSDave Kleikamp } 1975ac27a0ecSDave Kleikamp 1976b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1977196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1978196e402aSHarshad Shirwadkar 1979d6006186SEric Biggers static const char deprecated_msg[] = 1980d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1981437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1982b3881f74STheodore Ts'o 198356c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 198456c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 198556c50f11SDmitry Monakhov { 198656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 198733458eabSTheodore Ts'o char *qname, *old_qname = get_qf_name(sb, sbi, qtype); 198803dafb5fSChen Gang int ret = -1; 198956c50f11SDmitry Monakhov 199033458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && !old_qname) { 199156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 199256c50f11SDmitry Monakhov "Cannot change journaled " 199356c50f11SDmitry Monakhov "quota options when quota turned on"); 199457f73c2cSTheodore Ts'o return -1; 199556c50f11SDmitry Monakhov } 1996e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1997c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1998c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1999c325a67cSTheodore Ts'o return 1; 2000262b4662SJan Kara } 200156c50f11SDmitry Monakhov qname = match_strdup(args); 200256c50f11SDmitry Monakhov if (!qname) { 200356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 200456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 200557f73c2cSTheodore Ts'o return -1; 200656c50f11SDmitry Monakhov } 200733458eabSTheodore Ts'o if (old_qname) { 200833458eabSTheodore Ts'o if (strcmp(old_qname, qname) == 0) 200903dafb5fSChen Gang ret = 1; 201003dafb5fSChen Gang else 201156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 201203dafb5fSChen Gang "%s quota file already specified", 201303dafb5fSChen Gang QTYPE2NAME(qtype)); 201403dafb5fSChen Gang goto errout; 201556c50f11SDmitry Monakhov } 201603dafb5fSChen Gang if (strchr(qname, '/')) { 201756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 201856c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 201903dafb5fSChen Gang goto errout; 202056c50f11SDmitry Monakhov } 202133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], qname); 2022fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 202356c50f11SDmitry Monakhov return 1; 202403dafb5fSChen Gang errout: 202503dafb5fSChen Gang kfree(qname); 202603dafb5fSChen Gang return ret; 202756c50f11SDmitry Monakhov } 202856c50f11SDmitry Monakhov 202956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 203056c50f11SDmitry Monakhov { 203156c50f11SDmitry Monakhov 203256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 203333458eabSTheodore Ts'o char *old_qname = get_qf_name(sb, sbi, qtype); 203456c50f11SDmitry Monakhov 203533458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && old_qname) { 203656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 203756c50f11SDmitry Monakhov " when quota turned on"); 203857f73c2cSTheodore Ts'o return -1; 203956c50f11SDmitry Monakhov } 204033458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], NULL); 204133458eabSTheodore Ts'o synchronize_rcu(); 204233458eabSTheodore Ts'o kfree(old_qname); 204356c50f11SDmitry Monakhov return 1; 204456c50f11SDmitry Monakhov } 204556c50f11SDmitry Monakhov #endif 204656c50f11SDmitry Monakhov 204726092bf5STheodore Ts'o #define MOPT_SET 0x0001 204826092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 204926092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 205026092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 205126092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 205226092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 205326092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 205426092bf5STheodore Ts'o #define MOPT_Q 0 205526092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 205626092bf5STheodore Ts'o #else 205726092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 205826092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 205926092bf5STheodore Ts'o #endif 206026092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 20618dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 20628dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 20638dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 2064ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 20659cb20f94SIra Weiny #define MOPT_SKIP 0x0800 2066995a3ed6SHarshad Shirwadkar #define MOPT_2 0x1000 206726092bf5STheodore Ts'o 206826092bf5STheodore Ts'o static const struct mount_opts { 206926092bf5STheodore Ts'o int token; 207026092bf5STheodore Ts'o int mount_opt; 207126092bf5STheodore Ts'o int flags; 207226092bf5STheodore Ts'o } ext4_mount_opts[] = { 207326092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 207426092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 207526092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 207626092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 207726092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 207826092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 20798dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 20808dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 20818dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 20828dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 208326092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 208426092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 20858dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 20868dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20878dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 208859d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 2089327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 2090327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 2091c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 2092c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 20938dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 20941e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 209526092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 20968dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 20971e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20988dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 209926092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 210026092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 210126092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 21028dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 21037915a861SAles Novak MOPT_NO_EXT2}, 21048dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 21057915a861SAles Novak MOPT_NO_EXT2}, 210626092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 210726092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 210826092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 210926092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 211026092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 211126092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 211226092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 211326092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 211426092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 211526092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 21169cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 21179cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 21189cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 21199cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 21209cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 21219cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 21229cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 212326092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 21240efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 21250efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 21265ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 21275ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 21285ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 21298dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 21308dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 21318dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 21328dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 213326092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 213426092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 213526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 213626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 213726092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 213826092bf5STheodore Ts'o #else 213926092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 214026092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 214126092bf5STheodore Ts'o #endif 214226092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 214326092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 2144670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 214526092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 214626092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 214726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 214826092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 214926092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 215049da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 215149da9392SJan Kara MOPT_SET | MOPT_Q}, 215226092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 215349da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 215449da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 2155174fe5baSKaixu Xia {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING}, 2156174fe5baSKaixu Xia {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING}, 215726092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 215826092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 215926092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 216026092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 216126092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 2162df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 2163ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 2164cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 216521175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 21663d392b26STheodore Ts'o MOPT_SET}, 2167196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, 216899c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 21690f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 21700f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 21718016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, 0, MOPT_GTE0}, 21728016e29fSHarshad Shirwadkar #endif 217326092bf5STheodore Ts'o {Opt_err, 0, 0} 217426092bf5STheodore Ts'o }; 217526092bf5STheodore Ts'o 2176c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 2177c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 2178c83ad55eSGabriel Krisman Bertazi __u16 magic; 2179c83ad55eSGabriel Krisman Bertazi char *name; 2180c83ad55eSGabriel Krisman Bertazi char *version; 2181c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 2182c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 2183c83ad55eSGabriel Krisman Bertazi }; 2184c83ad55eSGabriel Krisman Bertazi 2185c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 2186c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 2187c83ad55eSGabriel Krisman Bertazi __u16 *flags) 2188c83ad55eSGabriel Krisman Bertazi { 2189c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 2190c83ad55eSGabriel Krisman Bertazi int i; 2191c83ad55eSGabriel Krisman Bertazi 2192c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 2193c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 2194c83ad55eSGabriel Krisman Bertazi break; 2195c83ad55eSGabriel Krisman Bertazi 2196c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 2197c83ad55eSGabriel Krisman Bertazi return -EINVAL; 2198c83ad55eSGabriel Krisman Bertazi 2199c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 2200c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 2201c83ad55eSGabriel Krisman Bertazi 2202c83ad55eSGabriel Krisman Bertazi return 0; 2203c83ad55eSGabriel Krisman Bertazi } 2204c83ad55eSGabriel Krisman Bertazi #endif 2205c83ad55eSGabriel Krisman Bertazi 2206ed318a6cSEric Biggers static int ext4_set_test_dummy_encryption(struct super_block *sb, 2207ed318a6cSEric Biggers const char *opt, 2208ed318a6cSEric Biggers const substring_t *arg, 2209ed318a6cSEric Biggers bool is_remount) 2210ed318a6cSEric Biggers { 2211ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 2212ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 2213ed318a6cSEric Biggers int err; 2214ed318a6cSEric Biggers 2215ed318a6cSEric Biggers /* 2216ed318a6cSEric Biggers * This mount option is just for testing, and it's not worthwhile to 2217ed318a6cSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 2218ed318a6cSEric Biggers * needed to allow it to be set or changed during remount. We do allow 2219ed318a6cSEric Biggers * it to be specified during remount, but only if there is no change. 2220ed318a6cSEric Biggers */ 2221ac4acb1fSEric Biggers if (is_remount && !sbi->s_dummy_enc_policy.policy) { 2222ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2223ed318a6cSEric Biggers "Can't set test_dummy_encryption on remount"); 2224ed318a6cSEric Biggers return -1; 2225ed318a6cSEric Biggers } 2226c8c868abSEric Biggers err = fscrypt_set_test_dummy_encryption(sb, arg->from, 2227ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2228ed318a6cSEric Biggers if (err) { 2229ed318a6cSEric Biggers if (err == -EEXIST) 2230ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2231ed318a6cSEric Biggers "Can't change test_dummy_encryption on remount"); 2232ed318a6cSEric Biggers else if (err == -EINVAL) 2233ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2234ed318a6cSEric Biggers "Value of option \"%s\" is unrecognized", opt); 2235ed318a6cSEric Biggers else 2236ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2237ed318a6cSEric Biggers "Error processing option \"%s\" [%d]", 2238ed318a6cSEric Biggers opt, err); 2239ed318a6cSEric Biggers return -1; 2240ed318a6cSEric Biggers } 2241ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2242ed318a6cSEric Biggers #else 2243ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2244ed318a6cSEric Biggers "Test dummy encryption mount option ignored"); 2245ed318a6cSEric Biggers #endif 2246ed318a6cSEric Biggers return 1; 2247ed318a6cSEric Biggers } 2248ed318a6cSEric Biggers 2249b237e304SHarshad Shirwadkar struct ext4_parsed_options { 2250b237e304SHarshad Shirwadkar unsigned long journal_devnum; 2251b237e304SHarshad Shirwadkar unsigned int journal_ioprio; 2252196e402aSHarshad Shirwadkar int mb_optimize_scan; 2253b237e304SHarshad Shirwadkar }; 2254b237e304SHarshad Shirwadkar 225526092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 2256b237e304SHarshad Shirwadkar substring_t *args, struct ext4_parsed_options *parsed_opts, 2257b237e304SHarshad Shirwadkar int is_remount) 225826092bf5STheodore Ts'o { 225926092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 226026092bf5STheodore Ts'o const struct mount_opts *m; 226108cefc7aSEric W. Biederman kuid_t uid; 226208cefc7aSEric W. Biederman kgid_t gid; 226326092bf5STheodore Ts'o int arg = 0; 226426092bf5STheodore Ts'o 226557f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 226657f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 226757f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 226857f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 226957f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 227057f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 227157f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 227257f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 227357f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 227457f73c2cSTheodore Ts'o #endif 227526092bf5STheodore Ts'o switch (token) { 2276f7048605STheodore Ts'o case Opt_noacl: 2277f7048605STheodore Ts'o case Opt_nouser_xattr: 2278f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 2279f7048605STheodore Ts'o break; 228026092bf5STheodore Ts'o case Opt_sb: 228126092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 228226092bf5STheodore Ts'o case Opt_removed: 22835f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 228426092bf5STheodore Ts'o return 1; 228526092bf5STheodore Ts'o case Opt_abort: 22869b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 228726092bf5STheodore Ts'o return 1; 228826092bf5STheodore Ts'o case Opt_i_version: 2289357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 229026092bf5STheodore Ts'o return 1; 2291a26f4992STheodore Ts'o case Opt_lazytime: 22921751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 2293a26f4992STheodore Ts'o return 1; 2294a26f4992STheodore Ts'o case Opt_nolazytime: 22951751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 2296a26f4992STheodore Ts'o return 1; 22974f74d15fSEric Biggers case Opt_inlinecrypt: 22984f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 22994f74d15fSEric Biggers sb->s_flags |= SB_INLINECRYPT; 23004f74d15fSEric Biggers #else 23014f74d15fSEric Biggers ext4_msg(sb, KERN_ERR, "inline encryption not supported"); 23024f74d15fSEric Biggers #endif 23034f74d15fSEric Biggers return 1; 230426092bf5STheodore Ts'o } 230526092bf5STheodore Ts'o 23065f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 23075f3633e3SJan Kara if (token == m->token) 23085f3633e3SJan Kara break; 23095f3633e3SJan Kara 23105f3633e3SJan Kara if (m->token == Opt_err) { 23115f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 23125f3633e3SJan Kara "or missing value", opt); 23135f3633e3SJan Kara return -1; 23145f3633e3SJan Kara } 23155f3633e3SJan Kara 23168dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 23178dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 23188dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 23198dc0aa8cSTheodore Ts'o return -1; 23208dc0aa8cSTheodore Ts'o } 23218dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 23228dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 23238dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 23248dc0aa8cSTheodore Ts'o return -1; 23258dc0aa8cSTheodore Ts'o } 23268dc0aa8cSTheodore Ts'o 2327ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 23280efb3b23SJan Kara return -1; 232926092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 233026092bf5STheodore Ts'o return -1; 2331c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 2332c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 233326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 23341e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 23351e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 2336c93cf2d7SDmitry Monakhov } else 2337c93cf2d7SDmitry Monakhov return -1; 2338c93cf2d7SDmitry Monakhov } 233926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 234026092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 234126092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 234226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 234326092bf5STheodore Ts'o "options when quota turned on"); 234426092bf5STheodore Ts'o return -1; 234526092bf5STheodore Ts'o } 234626092bf5STheodore Ts'o 234726092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 234826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 234926092bf5STheodore Ts'o } else if (token == Opt_commit) { 235026092bf5STheodore Ts'o if (arg == 0) 235126092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 23529ba55543Szhangyi (F) else if (arg > INT_MAX / HZ) { 23539ba55543Szhangyi (F) ext4_msg(sb, KERN_ERR, 23549ba55543Szhangyi (F) "Invalid commit interval %d, " 23559ba55543Szhangyi (F) "must be smaller than %d", 23569ba55543Szhangyi (F) arg, INT_MAX / HZ); 23579ba55543Szhangyi (F) return -1; 23589ba55543Szhangyi (F) } 235926092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 2360670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 23619803387cSTheodore Ts'o if ((arg & 1) || 23629803387cSTheodore Ts'o (arg < 4) || 23639803387cSTheodore Ts'o (arg > (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { 23649803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 23659803387cSTheodore Ts'o "Invalid want_extra_isize %d", arg); 23669803387cSTheodore Ts'o return -1; 23679803387cSTheodore Ts'o } 2368670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 236926092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 237026092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 237126092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 237226092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 237326092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2374e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 2375e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 2376e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2377e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 237826092bf5STheodore Ts'o return -1; 237926092bf5STheodore Ts'o } 238026092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 238126092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 238226092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 238326092bf5STheodore Ts'o if (!args->from) 238426092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 238526092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 2386df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 2387df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 23888016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 23898016e29fSHarshad Shirwadkar } else if (token == Opt_fc_debug_max_replay) { 23908016e29fSHarshad Shirwadkar sbi->s_fc_debug_max_replay = arg; 23918016e29fSHarshad Shirwadkar #endif 239226092bf5STheodore Ts'o } else if (token == Opt_stripe) { 239326092bf5STheodore Ts'o sbi->s_stripe = arg; 23940efb3b23SJan Kara } else if (token == Opt_resuid) { 23950efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 23960efb3b23SJan Kara if (!uid_valid(uid)) { 23975f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 23980efb3b23SJan Kara return -1; 23990efb3b23SJan Kara } 24000efb3b23SJan Kara sbi->s_resuid = uid; 24010efb3b23SJan Kara } else if (token == Opt_resgid) { 24020efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 24030efb3b23SJan Kara if (!gid_valid(gid)) { 24045f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 24050efb3b23SJan Kara return -1; 24060efb3b23SJan Kara } 24070efb3b23SJan Kara sbi->s_resgid = gid; 24080efb3b23SJan Kara } else if (token == Opt_journal_dev) { 24090efb3b23SJan Kara if (is_remount) { 24100efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 24110efb3b23SJan Kara "Cannot specify journal on remount"); 24120efb3b23SJan Kara return -1; 24130efb3b23SJan Kara } 2414b237e304SHarshad Shirwadkar parsed_opts->journal_devnum = arg; 2415ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2416ad4eec61SEric Sandeen char *journal_path; 2417ad4eec61SEric Sandeen struct inode *journal_inode; 2418ad4eec61SEric Sandeen struct path path; 2419ad4eec61SEric Sandeen int error; 2420ad4eec61SEric Sandeen 2421ad4eec61SEric Sandeen if (is_remount) { 2422ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 2423ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2424ad4eec61SEric Sandeen return -1; 2425ad4eec61SEric Sandeen } 2426ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 2427ad4eec61SEric Sandeen if (!journal_path) { 2428ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 2429ad4eec61SEric Sandeen "journal device string"); 2430ad4eec61SEric Sandeen return -1; 2431ad4eec61SEric Sandeen } 2432ad4eec61SEric Sandeen 2433ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 2434ad4eec61SEric Sandeen if (error) { 2435ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 2436ad4eec61SEric Sandeen "journal device path: error %d", error); 2437ad4eec61SEric Sandeen kfree(journal_path); 2438ad4eec61SEric Sandeen return -1; 2439ad4eec61SEric Sandeen } 2440ad4eec61SEric Sandeen 24412b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2442ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 2443ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 2444ad4eec61SEric Sandeen "is not a block device", journal_path); 2445ad4eec61SEric Sandeen path_put(&path); 2446ad4eec61SEric Sandeen kfree(journal_path); 2447ad4eec61SEric Sandeen return -1; 2448ad4eec61SEric Sandeen } 2449ad4eec61SEric Sandeen 2450b237e304SHarshad Shirwadkar parsed_opts->journal_devnum = new_encode_dev(journal_inode->i_rdev); 2451ad4eec61SEric Sandeen path_put(&path); 2452ad4eec61SEric Sandeen kfree(journal_path); 24530efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 24540efb3b23SJan Kara if (arg > 7) { 24555f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 24560efb3b23SJan Kara " (must be 0-7)"); 24570efb3b23SJan Kara return -1; 24580efb3b23SJan Kara } 2459b237e304SHarshad Shirwadkar parsed_opts->journal_ioprio = 24600efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 24616ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 2462ed318a6cSEric Biggers return ext4_set_test_dummy_encryption(sb, opt, &args[0], 2463ed318a6cSEric Biggers is_remount); 246426092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 246526092bf5STheodore Ts'o if (is_remount) { 246626092bf5STheodore Ts'o if (!sbi->s_journal) 246726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 24685f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 246926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 247026092bf5STheodore Ts'o "Cannot change data mode on remount"); 247126092bf5STheodore Ts'o return -1; 247226092bf5STheodore Ts'o } 247326092bf5STheodore Ts'o } else { 247426092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 247526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 247626092bf5STheodore Ts'o } 247726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 247826092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 247926092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 248026092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 24815f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 24825f3633e3SJan Kara "quota options when quota turned on"); 248326092bf5STheodore Ts'o return -1; 248426092bf5STheodore Ts'o } 2485e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 2486c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 2487c325a67cSTheodore Ts'o "Quota format mount options ignored " 2488262b4662SJan Kara "when QUOTA feature is enabled"); 2489c325a67cSTheodore Ts'o return 1; 2490262b4662SJan Kara } 249126092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 249226092bf5STheodore Ts'o #endif 24939cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 24949cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2495ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 24969cb20f94SIra Weiny switch (token) { 24979cb20f94SIra Weiny case Opt_dax: 24989cb20f94SIra Weiny case Opt_dax_always: 2499829b37b8STheodore Ts'o if (is_remount && 2500829b37b8STheodore Ts'o (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2501829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 2502829b37b8STheodore Ts'o fail_dax_change_remount: 2503829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't change " 2504829b37b8STheodore Ts'o "dax mount option while remounting"); 2505829b37b8STheodore Ts'o return -1; 2506829b37b8STheodore Ts'o } 2507829b37b8STheodore Ts'o if (is_remount && 2508829b37b8STheodore Ts'o (test_opt(sb, DATA_FLAGS) == 2509829b37b8STheodore Ts'o EXT4_MOUNT_JOURNAL_DATA)) { 2510829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 2511829b37b8STheodore Ts'o "both data=journal and dax"); 2512829b37b8STheodore Ts'o return -1; 2513829b37b8STheodore Ts'o } 2514ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 2515ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 25169cb20f94SIra Weiny sbi->s_mount_opt |= EXT4_MOUNT_DAX_ALWAYS; 25179cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 25189cb20f94SIra Weiny break; 25199cb20f94SIra Weiny case Opt_dax_never: 2520829b37b8STheodore Ts'o if (is_remount && 2521829b37b8STheodore Ts'o (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2522829b37b8STheodore Ts'o (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) 2523829b37b8STheodore Ts'o goto fail_dax_change_remount; 25249cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 25259cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 25269cb20f94SIra Weiny break; 25279cb20f94SIra Weiny case Opt_dax_inode: 2528829b37b8STheodore Ts'o if (is_remount && 2529829b37b8STheodore Ts'o ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2530829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2531829b37b8STheodore Ts'o !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) 2532829b37b8STheodore Ts'o goto fail_dax_change_remount; 25339cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 25349cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 25359cb20f94SIra Weiny /* Strictly for printing options */ 25369cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_INODE; 25379cb20f94SIra Weiny break; 25389cb20f94SIra Weiny } 2539ef83b6e8SDan Williams #else 2540923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 25419cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 25429cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 2543923ae0ffSRoss Zwisler return -1; 2544923ae0ffSRoss Zwisler #endif 25457915a861SAles Novak } else if (token == Opt_data_err_abort) { 25467915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 25477915a861SAles Novak } else if (token == Opt_data_err_ignore) { 25487915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 2549196e402aSHarshad Shirwadkar } else if (token == Opt_mb_optimize_scan) { 2550196e402aSHarshad Shirwadkar if (arg != 0 && arg != 1) { 2551196e402aSHarshad Shirwadkar ext4_msg(sb, KERN_WARNING, 2552196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2553196e402aSHarshad Shirwadkar return -1; 2554196e402aSHarshad Shirwadkar } 2555196e402aSHarshad Shirwadkar parsed_opts->mb_optimize_scan = arg; 255626092bf5STheodore Ts'o } else { 255726092bf5STheodore Ts'o if (!args->from) 255826092bf5STheodore Ts'o arg = 1; 255926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 256026092bf5STheodore Ts'o arg = !arg; 256126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 256226092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 256326092bf5STheodore Ts'o "buggy handling of option %s", opt); 256426092bf5STheodore Ts'o WARN_ON(1); 256526092bf5STheodore Ts'o return -1; 256626092bf5STheodore Ts'o } 2567995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2568995a3ed6SHarshad Shirwadkar if (arg != 0) 2569995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 |= m->mount_opt; 2570995a3ed6SHarshad Shirwadkar else 2571995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 &= ~m->mount_opt; 2572995a3ed6SHarshad Shirwadkar } else { 257326092bf5STheodore Ts'o if (arg != 0) 257426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 257526092bf5STheodore Ts'o else 257626092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 257726092bf5STheodore Ts'o } 2578995a3ed6SHarshad Shirwadkar } 257926092bf5STheodore Ts'o return 1; 258026092bf5STheodore Ts'o } 258126092bf5STheodore Ts'o 2582ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 2583b237e304SHarshad Shirwadkar struct ext4_parsed_options *ret_opts, 2584661aa520SEric Sandeen int is_remount) 2585ac27a0ecSDave Kleikamp { 2586ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 258726092bf5STheodore Ts'o int token; 2588*4c94bff9SLukas Czerner char *p; 2589ac27a0ecSDave Kleikamp 2590ac27a0ecSDave Kleikamp if (!options) 2591ac27a0ecSDave Kleikamp return 1; 2592ac27a0ecSDave Kleikamp 2593ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 2594ac27a0ecSDave Kleikamp if (!*p) 2595ac27a0ecSDave Kleikamp continue; 259615121c18SEric Sandeen /* 259715121c18SEric Sandeen * Initialize args struct so we know whether arg was 259815121c18SEric Sandeen * found; some options take optional arguments. 259915121c18SEric Sandeen */ 2600caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 2601ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 2602b237e304SHarshad Shirwadkar if (handle_mount_opt(sb, p, token, args, ret_opts, 2603b237e304SHarshad Shirwadkar is_remount) < 0) 2604ac27a0ecSDave Kleikamp return 0; 2605ac27a0ecSDave Kleikamp } 2606*4c94bff9SLukas Czerner return ext4_validate_options(sb); 2607*4c94bff9SLukas Czerner } 2608*4c94bff9SLukas Czerner 2609*4c94bff9SLukas Czerner static int ext4_validate_options(struct super_block *sb) 2610*4c94bff9SLukas Czerner { 2611*4c94bff9SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2612ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2613*4c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 261449da9392SJan Kara /* 261549da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 261649da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 261749da9392SJan Kara * to support legacy quotas in quota files. 261849da9392SJan Kara */ 261949da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 262049da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 262149da9392SJan Kara "Cannot enable project quota enforcement."); 262249da9392SJan Kara return 0; 262349da9392SJan Kara } 262433458eabSTheodore Ts'o usr_qf_name = get_qf_name(sb, sbi, USRQUOTA); 262533458eabSTheodore Ts'o grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA); 262633458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 262733458eabSTheodore Ts'o if (test_opt(sb, USRQUOTA) && usr_qf_name) 2628fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 2629ac27a0ecSDave Kleikamp 263033458eabSTheodore Ts'o if (test_opt(sb, GRPQUOTA) && grp_qf_name) 2631fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2632ac27a0ecSDave Kleikamp 263356c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2634b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 2635b31e1552SEric Sandeen "format mixing"); 2636ac27a0ecSDave Kleikamp return 0; 2637ac27a0ecSDave Kleikamp } 2638ac27a0ecSDave Kleikamp 2639ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2640b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 2641b31e1552SEric Sandeen "not specified"); 2642ac27a0ecSDave Kleikamp return 0; 2643ac27a0ecSDave Kleikamp } 2644ac27a0ecSDave Kleikamp } 2645ac27a0ecSDave Kleikamp #endif 2646626b035bSRitesh Harjani if (test_opt(sb, DIOREAD_NOLOCK)) { 2647626b035bSRitesh Harjani int blocksize = 2648626b035bSRitesh Harjani BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2649626b035bSRitesh Harjani if (blocksize < PAGE_SIZE) 2650626b035bSRitesh Harjani ext4_msg(sb, KERN_WARNING, "Warning: mounting with an " 2651626b035bSRitesh Harjani "experimental mount option 'dioread_nolock' " 2652626b035bSRitesh Harjani "for blocksize < PAGE_SIZE"); 2653626b035bSRitesh Harjani } 2654ac27a0ecSDave Kleikamp return 1; 2655ac27a0ecSDave Kleikamp } 2656ac27a0ecSDave Kleikamp 26572adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 26582adf6da8STheodore Ts'o struct super_block *sb) 26592adf6da8STheodore Ts'o { 26602adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 26612adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 266233458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 26632adf6da8STheodore Ts'o 26642adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 26652adf6da8STheodore Ts'o char *fmtname = ""; 26662adf6da8STheodore Ts'o 26672adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 26682adf6da8STheodore Ts'o case QFMT_VFS_OLD: 26692adf6da8STheodore Ts'o fmtname = "vfsold"; 26702adf6da8STheodore Ts'o break; 26712adf6da8STheodore Ts'o case QFMT_VFS_V0: 26722adf6da8STheodore Ts'o fmtname = "vfsv0"; 26732adf6da8STheodore Ts'o break; 26742adf6da8STheodore Ts'o case QFMT_VFS_V1: 26752adf6da8STheodore Ts'o fmtname = "vfsv1"; 26762adf6da8STheodore Ts'o break; 26772adf6da8STheodore Ts'o } 26782adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 26792adf6da8STheodore Ts'o } 26802adf6da8STheodore Ts'o 268133458eabSTheodore Ts'o rcu_read_lock(); 268233458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 268333458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 268433458eabSTheodore Ts'o if (usr_qf_name) 268533458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 268633458eabSTheodore Ts'o if (grp_qf_name) 268733458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 268833458eabSTheodore Ts'o rcu_read_unlock(); 26892adf6da8STheodore Ts'o #endif 26902adf6da8STheodore Ts'o } 26912adf6da8STheodore Ts'o 26925a916be1STheodore Ts'o static const char *token2str(int token) 26935a916be1STheodore Ts'o { 269450df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 26955a916be1STheodore Ts'o 26965a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 26975a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 26985a916be1STheodore Ts'o break; 26995a916be1STheodore Ts'o return t->pattern; 27005a916be1STheodore Ts'o } 27015a916be1STheodore Ts'o 27022adf6da8STheodore Ts'o /* 27032adf6da8STheodore Ts'o * Show an option if 27042adf6da8STheodore Ts'o * - it's set to a non-default value OR 27052adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 27062adf6da8STheodore Ts'o */ 270766acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 270866acdcf4STheodore Ts'o int nodefs) 27092adf6da8STheodore Ts'o { 27102adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 27112adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 271268afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 27135a916be1STheodore Ts'o const struct mount_opts *m; 271466acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 27152adf6da8STheodore Ts'o 271666acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 271766acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 27182adf6da8STheodore Ts'o 27192adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 27205a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 27215a916be1STheodore Ts'o 27225a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 27235a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 27245a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 27259cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 27265a916be1STheodore Ts'o continue; 272768afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 27285a916be1STheodore Ts'o continue; /* skip if same as the default */ 27295a916be1STheodore Ts'o if ((want_set && 27305a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 27315a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 27325a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 27335a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 27345a916be1STheodore Ts'o } 27355a916be1STheodore Ts'o 273608cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 27375a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 273808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 273908cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 274008cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 27415a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 274208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 274308cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 274466acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 27455a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 27465a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 27472adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 27485a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 27492adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 27505a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 275166acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 27525a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 275366acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 27545a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 275566acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 27565a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2757357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 27585a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 275966acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 27605a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 276168afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 276268afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 27632adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 27645a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 27652adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 27665a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 27672adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 27685a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 27695a916be1STheodore Ts'o } 277066acdcf4STheodore Ts'o if (nodefs || 277166acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 27725a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 27732adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 27742adf6da8STheodore Ts'o 2775ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 277666acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 27775a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2778df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2779df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 27807915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 27817915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2782ed318a6cSEric Biggers 2783ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 27842adf6da8STheodore Ts'o 27854f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 27864f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 27874f74d15fSEric Biggers 27889cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 27899cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 27909cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 27919cb20f94SIra Weiny else 27929cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 27939cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 27949cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 27959cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 27969cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 27979cb20f94SIra Weiny } 27982adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 27992adf6da8STheodore Ts'o return 0; 28002adf6da8STheodore Ts'o } 28012adf6da8STheodore Ts'o 280266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 280366acdcf4STheodore Ts'o { 280466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 280566acdcf4STheodore Ts'o } 280666acdcf4STheodore Ts'o 2807ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 280866acdcf4STheodore Ts'o { 280966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 281066acdcf4STheodore Ts'o int rc; 281166acdcf4STheodore Ts'o 2812bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 281366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 281466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 281566acdcf4STheodore Ts'o return rc; 281666acdcf4STheodore Ts'o } 281766acdcf4STheodore Ts'o 2818617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2819ac27a0ecSDave Kleikamp int read_only) 2820ac27a0ecSDave Kleikamp { 2821617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2822c89128a0SJaegeuk Kim int err = 0; 2823ac27a0ecSDave Kleikamp 2824617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2825b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2826b31e1552SEric Sandeen "forcing read-only mode"); 2827c89128a0SJaegeuk Kim err = -EROFS; 28285adaccacSyangerkun goto done; 2829ac27a0ecSDave Kleikamp } 2830ac27a0ecSDave Kleikamp if (read_only) 2831281b5995STheodore Ts'o goto done; 2832617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2833b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2834b31e1552SEric Sandeen "running e2fsck is recommended"); 2835c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2836b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2837b31e1552SEric Sandeen "warning: mounting fs with errors, " 2838b31e1552SEric Sandeen "running e2fsck is recommended"); 2839ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2840ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2841ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2842b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2843b31e1552SEric Sandeen "warning: maximal mount count reached, " 2844b31e1552SEric Sandeen "running e2fsck is recommended"); 2845ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 28466a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 28476a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2848b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2849b31e1552SEric Sandeen "warning: checktime reached, " 2850b31e1552SEric Sandeen "running e2fsck is recommended"); 28510390131bSFrank Mayhar if (!sbi->s_journal) 2852216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2853ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2854617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2855e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 28566a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 285702f310fcSJan Kara if (sbi->s_journal) { 2858e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 285902f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 286002f310fcSJan Kara ext4_set_feature_orphan_present(sb); 286102f310fcSJan Kara } 2862ac27a0ecSDave Kleikamp 28634392fbc4SJan Kara err = ext4_commit_super(sb); 2864281b5995STheodore Ts'o done: 2865ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2866a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2867a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2868ac27a0ecSDave Kleikamp sb->s_blocksize, 2869ac27a0ecSDave Kleikamp sbi->s_groups_count, 2870617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2871617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2872a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2873ac27a0ecSDave Kleikamp 28747abc52c2SDan Magenheimer cleancache_init_fs(sb); 2875c89128a0SJaegeuk Kim return err; 2876ac27a0ecSDave Kleikamp } 2877ac27a0ecSDave Kleikamp 2878117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2879117fff10STheodore Ts'o { 2880117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 28817c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 288237b0b6b8SDan Carpenter int size, i, j; 2883117fff10STheodore Ts'o 2884117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2885117fff10STheodore Ts'o return 0; 2886117fff10STheodore Ts'o 2887117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2888117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2889117fff10STheodore Ts'o return 0; 2890117fff10STheodore Ts'o 28917c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 28927c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 2893117fff10STheodore Ts'o if (!new_groups) { 28947c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 28957c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 2896117fff10STheodore Ts'o return -ENOMEM; 2897117fff10STheodore Ts'o } 28987c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 28997c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 29007c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 29017c990728SSuraj Jitindar Singh GFP_KERNEL); 29027c990728SSuraj Jitindar Singh if (!new_groups[i]) { 290337b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 290437b0b6b8SDan Carpenter kvfree(new_groups[j]); 29057c990728SSuraj Jitindar Singh kvfree(new_groups); 29067c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 29077c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 29087c990728SSuraj Jitindar Singh return -ENOMEM; 2909117fff10STheodore Ts'o } 29107c990728SSuraj Jitindar Singh } 29117c990728SSuraj Jitindar Singh rcu_read_lock(); 29127c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 29137c990728SSuraj Jitindar Singh if (old_groups) 29147c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 29157c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 29167c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 29177c990728SSuraj Jitindar Singh rcu_read_unlock(); 29187c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 29197c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 29207c990728SSuraj Jitindar Singh if (old_groups) 29217c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 2922117fff10STheodore Ts'o return 0; 2923117fff10STheodore Ts'o } 2924117fff10STheodore Ts'o 2925772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2926772cb7c8SJose R. Santos { 2927772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2928772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 29297c990728SSuraj Jitindar Singh struct flex_groups *fg; 2930772cb7c8SJose R. Santos ext4_group_t flex_group; 2931117fff10STheodore Ts'o int i, err; 2932772cb7c8SJose R. Santos 2933503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2934d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2935772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2936772cb7c8SJose R. Santos return 1; 2937772cb7c8SJose R. Santos } 2938772cb7c8SJose R. Santos 2939117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2940117fff10STheodore Ts'o if (err) 2941772cb7c8SJose R. Santos goto failed; 2942772cb7c8SJose R. Santos 2943772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 294488b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2945772cb7c8SJose R. Santos 2946772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 29477c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 29487c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 294990ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 29507c990728SSuraj Jitindar Singh &fg->free_clusters); 29517c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 2952772cb7c8SJose R. Santos } 2953772cb7c8SJose R. Santos 2954772cb7c8SJose R. Santos return 1; 2955772cb7c8SJose R. Santos failed: 2956772cb7c8SJose R. Santos return 0; 2957772cb7c8SJose R. Santos } 2958772cb7c8SJose R. Santos 2959e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2960717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2961717d50e4SAndreas Dilger { 2962b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2963717d50e4SAndreas Dilger __u16 crc = 0; 2964717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2965e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2966717d50e4SAndreas Dilger 29679aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2968feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2969feb0ab32SDarrick J. Wong __u32 csum32; 2970b47820edSDaeho Jeong __u16 dummy_csum = 0; 2971feb0ab32SDarrick J. Wong 2972feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2973feb0ab32SDarrick J. Wong sizeof(le_group)); 2974b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2975b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2976b47820edSDaeho Jeong sizeof(dummy_csum)); 2977b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2978b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2979b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2980b47820edSDaeho Jeong sbi->s_desc_size - offset); 2981feb0ab32SDarrick J. Wong 2982feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2983feb0ab32SDarrick J. Wong goto out; 2984feb0ab32SDarrick J. Wong } 2985feb0ab32SDarrick J. Wong 2986feb0ab32SDarrick J. Wong /* old crc16 code */ 2987e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2988813d32f9SDarrick J. Wong return 0; 2989813d32f9SDarrick J. Wong 2990717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2991717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2992717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2993717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2994717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2995e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2996717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2997717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2998717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2999717d50e4SAndreas Dilger offset); 3000717d50e4SAndreas Dilger 3001feb0ab32SDarrick J. Wong out: 3002717d50e4SAndreas Dilger return cpu_to_le16(crc); 3003717d50e4SAndreas Dilger } 3004717d50e4SAndreas Dilger 3005feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3006717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3007717d50e4SAndreas Dilger { 3008feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3009e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3010717d50e4SAndreas Dilger return 0; 3011717d50e4SAndreas Dilger 3012717d50e4SAndreas Dilger return 1; 3013717d50e4SAndreas Dilger } 3014717d50e4SAndreas Dilger 3015feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3016feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3017feb0ab32SDarrick J. Wong { 3018feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3019feb0ab32SDarrick J. Wong return; 3020e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3021feb0ab32SDarrick J. Wong } 3022feb0ab32SDarrick J. Wong 3023ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3024bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3025829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3026bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3027ac27a0ecSDave Kleikamp { 3028617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3029617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3030617ba13bSMingming Cao ext4_fsblk_t last_block; 303144de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3032bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3033bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3034bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3035ce421581SJose R. Santos int flexbg_flag = 0; 3036bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3037ac27a0ecSDave Kleikamp 3038e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3039ce421581SJose R. Santos flexbg_flag = 1; 3040ce421581SJose R. Santos 3041617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3042ac27a0ecSDave Kleikamp 3043197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3044197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3045197cd65aSAkinobu Mita 3046ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3047bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3048ac27a0ecSDave Kleikamp else 3049ac27a0ecSDave Kleikamp last_block = first_block + 3050617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3051ac27a0ecSDave Kleikamp 3052bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3053bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3054bfff6873SLukas Czerner grp = i; 3055bfff6873SLukas Czerner 30568fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3057829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3058829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3059829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3060829fa70dSTheodore Ts'o "superblock", i); 306118db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 306218db4b4eSTheodore Ts'o return 0; 3063829fa70dSTheodore Ts'o } 306477260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 306577260807STheodore Ts'o block_bitmap <= last_bg_block) { 306677260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 306777260807STheodore Ts'o "Block bitmap for group %u overlaps " 306877260807STheodore Ts'o "block group descriptors", i); 306977260807STheodore Ts'o if (!sb_rdonly(sb)) 307077260807STheodore Ts'o return 0; 307177260807STheodore Ts'o } 30722b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3073b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3074a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3075b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3076ac27a0ecSDave Kleikamp return 0; 3077ac27a0ecSDave Kleikamp } 30788fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3079829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3080829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3081829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3082829fa70dSTheodore Ts'o "superblock", i); 308318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 308418db4b4eSTheodore Ts'o return 0; 3085829fa70dSTheodore Ts'o } 308677260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 308777260807STheodore Ts'o inode_bitmap <= last_bg_block) { 308877260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 308977260807STheodore Ts'o "Inode bitmap for group %u overlaps " 309077260807STheodore Ts'o "block group descriptors", i); 309177260807STheodore Ts'o if (!sb_rdonly(sb)) 309277260807STheodore Ts'o return 0; 309377260807STheodore Ts'o } 30942b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3095b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3096a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3097b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3098ac27a0ecSDave Kleikamp return 0; 3099ac27a0ecSDave Kleikamp } 31008fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3101829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3102829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3103829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3104829fa70dSTheodore Ts'o "superblock", i); 310518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 310618db4b4eSTheodore Ts'o return 0; 3107829fa70dSTheodore Ts'o } 310877260807STheodore Ts'o if (inode_table >= sb_block + 1 && 310977260807STheodore Ts'o inode_table <= last_bg_block) { 311077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 311177260807STheodore Ts'o "Inode table for group %u overlaps " 311277260807STheodore Ts'o "block group descriptors", i); 311377260807STheodore Ts'o if (!sb_rdonly(sb)) 311477260807STheodore Ts'o return 0; 311577260807STheodore Ts'o } 3116bd81d8eeSLaurent Vivier if (inode_table < first_block || 31172b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3118b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3119a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3120b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3121ac27a0ecSDave Kleikamp return 0; 3122ac27a0ecSDave Kleikamp } 3123955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3124feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3125b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3126b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3127e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3128fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3129bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3130955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3131717d50e4SAndreas Dilger return 0; 3132717d50e4SAndreas Dilger } 31337ee1ec4cSLi Zefan } 3134955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3135ce421581SJose R. Santos if (!flexbg_flag) 3136617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3137ac27a0ecSDave Kleikamp } 3138bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3139bfff6873SLukas Czerner *first_not_zeroed = grp; 3140ac27a0ecSDave Kleikamp return 1; 3141ac27a0ecSDave Kleikamp } 3142ac27a0ecSDave Kleikamp 3143cd2291a4SEric Sandeen /* 3144cd2291a4SEric Sandeen * Maximal extent format file size. 3145cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3146cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3147cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3148cd2291a4SEric Sandeen * so that won't be a limiting factor. 3149cd2291a4SEric Sandeen * 3150f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3151f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3152f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3153f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3154f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3155f17722f9SLukas Czerner * 3156cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3157cd2291a4SEric Sandeen */ 3158f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3159cd2291a4SEric Sandeen { 3160cd2291a4SEric Sandeen loff_t res; 3161cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3162cd2291a4SEric Sandeen 316372deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 316472deb455SChristoph Hellwig 316572deb455SChristoph Hellwig if (!has_huge_files) { 3166cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3167cd2291a4SEric Sandeen 3168cd2291a4SEric Sandeen /* total blocks in file system block size */ 3169cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3170cd2291a4SEric Sandeen upper_limit <<= blkbits; 3171cd2291a4SEric Sandeen } 3172cd2291a4SEric Sandeen 3173f17722f9SLukas Czerner /* 3174f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3175f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3176f17722f9SLukas Czerner * size 3177f17722f9SLukas Czerner */ 3178f17722f9SLukas Czerner res = (1LL << 32) - 1; 3179cd2291a4SEric Sandeen res <<= blkbits; 3180cd2291a4SEric Sandeen 3181cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3182cd2291a4SEric Sandeen if (res > upper_limit) 3183cd2291a4SEric Sandeen res = upper_limit; 3184cd2291a4SEric Sandeen 3185cd2291a4SEric Sandeen return res; 3186cd2291a4SEric Sandeen } 3187ac27a0ecSDave Kleikamp 3188ac27a0ecSDave Kleikamp /* 3189cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 31900fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 31910fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3192ac27a0ecSDave Kleikamp */ 3193f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3194ac27a0ecSDave Kleikamp { 319575ca6ad4SRitesh Harjani unsigned long long upper_limit, res = EXT4_NDIR_BLOCKS; 31960fc1b451SAneesh Kumar K.V int meta_blocks; 319775ca6ad4SRitesh Harjani 319875ca6ad4SRitesh Harjani /* 319975ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 32000b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 32010b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 32020b8e58a1SAndreas Dilger * 32030b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 32040b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 32050fc1b451SAneesh Kumar K.V */ 320672deb455SChristoph Hellwig if (!has_huge_files) { 32070fc1b451SAneesh Kumar K.V /* 320872deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 320972deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 321072deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 32110fc1b451SAneesh Kumar K.V */ 32120fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 32130fc1b451SAneesh Kumar K.V 32140fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 32150fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 32160fc1b451SAneesh Kumar K.V 32170fc1b451SAneesh Kumar K.V } else { 32188180a562SAneesh Kumar K.V /* 32198180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 32208180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 32218180a562SAneesh Kumar K.V * represent total number of blocks in 32228180a562SAneesh Kumar K.V * file system block size 32238180a562SAneesh Kumar K.V */ 32240fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 32250fc1b451SAneesh Kumar K.V 32260fc1b451SAneesh Kumar K.V } 32270fc1b451SAneesh Kumar K.V 32280fc1b451SAneesh Kumar K.V /* indirect blocks */ 32290fc1b451SAneesh Kumar K.V meta_blocks = 1; 32300fc1b451SAneesh Kumar K.V /* double indirect blocks */ 32310fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 32320fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 32330fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 32340fc1b451SAneesh Kumar K.V 32350fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 32360fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3237ac27a0ecSDave Kleikamp 3238ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3239ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3240ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3241ac27a0ecSDave Kleikamp res <<= bits; 3242ac27a0ecSDave Kleikamp if (res > upper_limit) 3243ac27a0ecSDave Kleikamp res = upper_limit; 32440fc1b451SAneesh Kumar K.V 32450fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 32460fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 32470fc1b451SAneesh Kumar K.V 324875ca6ad4SRitesh Harjani return (loff_t)res; 3249ac27a0ecSDave Kleikamp } 3250ac27a0ecSDave Kleikamp 3251617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 325270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3253ac27a0ecSDave Kleikamp { 3254617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3255fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3256ac27a0ecSDave Kleikamp int has_super = 0; 3257ac27a0ecSDave Kleikamp 3258ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3259ac27a0ecSDave Kleikamp 3260e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 326170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3262ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3263617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3264ac27a0ecSDave Kleikamp has_super = 1; 32650b8e58a1SAndreas Dilger 3266bd63f6b0SDarrick J. Wong /* 3267bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3268bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3269bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3270bd63f6b0SDarrick J. Wong * compensate. 3271bd63f6b0SDarrick J. Wong */ 3272bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 327349598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3274bd63f6b0SDarrick J. Wong has_super++; 3275bd63f6b0SDarrick J. Wong 3276617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3277ac27a0ecSDave Kleikamp } 3278ac27a0ecSDave Kleikamp 3279c9de560dSAlex Tomas /** 3280c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3281c9de560dSAlex Tomas * @sbi: In memory super block info 3282c9de560dSAlex Tomas * 3283c9de560dSAlex Tomas * If we have specified it via mount option, then 3284c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3285c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3286c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3287c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3288c9de560dSAlex Tomas * 3289c9de560dSAlex Tomas */ 3290c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3291c9de560dSAlex Tomas { 3292c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3293c9de560dSAlex Tomas unsigned long stripe_width = 3294c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 32953eb08658SDan Ehrenberg int ret; 3296c9de560dSAlex Tomas 3297c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 32983eb08658SDan Ehrenberg ret = sbi->s_stripe; 32995469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 33003eb08658SDan Ehrenberg ret = stripe_width; 33015469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 33023eb08658SDan Ehrenberg ret = stride; 33033eb08658SDan Ehrenberg else 33043eb08658SDan Ehrenberg ret = 0; 3305c9de560dSAlex Tomas 33063eb08658SDan Ehrenberg /* 33073eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 33083eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 33093eb08658SDan Ehrenberg */ 33103eb08658SDan Ehrenberg if (ret <= 1) 33113eb08658SDan Ehrenberg ret = 0; 3312c9de560dSAlex Tomas 33133eb08658SDan Ehrenberg return ret; 3314c9de560dSAlex Tomas } 3315ac27a0ecSDave Kleikamp 3316a13fb1a4SEric Sandeen /* 3317a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3318a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3319a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3320a13fb1a4SEric Sandeen * 0 if it cannot be. 3321a13fb1a4SEric Sandeen */ 332225c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3323a13fb1a4SEric Sandeen { 3324e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3325a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3326a13fb1a4SEric Sandeen "Couldn't mount because of " 3327a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3328a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3329a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3330a13fb1a4SEric Sandeen return 0; 3331a13fb1a4SEric Sandeen } 3332a13fb1a4SEric Sandeen 3333c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3334c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3335c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3336c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3337c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3338c83ad55eSGabriel Krisman Bertazi return 0; 3339c83ad55eSGabriel Krisman Bertazi } 3340c83ad55eSGabriel Krisman Bertazi #endif 3341c83ad55eSGabriel Krisman Bertazi 3342a13fb1a4SEric Sandeen if (readonly) 3343a13fb1a4SEric Sandeen return 1; 3344a13fb1a4SEric Sandeen 3345e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 33462cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 33471751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 33482cb5cc8bSDarrick J. Wong return 1; 33492cb5cc8bSDarrick J. Wong } 33502cb5cc8bSDarrick J. Wong 3351a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3352e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3353a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3354a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3355a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3356a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3357a13fb1a4SEric Sandeen return 0; 3358a13fb1a4SEric Sandeen } 3359e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3360bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3361bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3362bab08ab9STheodore Ts'o "extents feature\n"); 3363bab08ab9STheodore Ts'o return 0; 3364bab08ab9STheodore Ts'o } 33657c319d32SAditya Kali 33669db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3367d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3368d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 33697c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3370d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3371689c958cSLi Xi return 0; 3372689c958cSLi Xi } 33737c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3374a13fb1a4SEric Sandeen return 1; 3375a13fb1a4SEric Sandeen } 3376a13fb1a4SEric Sandeen 337766e61a9eSTheodore Ts'o /* 337866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 337966e61a9eSTheodore Ts'o * on the file system 338066e61a9eSTheodore Ts'o */ 3381235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 338266e61a9eSTheodore Ts'o { 3383235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3384235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3385235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 338666e61a9eSTheodore Ts'o 338766e61a9eSTheodore Ts'o if (es->s_error_count) 3388ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3389ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 339066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 339166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 33926a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 33936a0678a7SArnd Bergmann sb->s_id, 33946a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 339566e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 339666e61a9eSTheodore Ts'o es->s_first_error_func, 339766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 339866e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3399651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 340066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 340166e61a9eSTheodore Ts'o if (es->s_first_error_block) 3402651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 340366e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3404651e1c3bSJoe Perches printk(KERN_CONT "\n"); 340566e61a9eSTheodore Ts'o } 340666e61a9eSTheodore Ts'o if (es->s_last_error_time) { 34076a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 34086a0678a7SArnd Bergmann sb->s_id, 34096a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 341066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 341166e61a9eSTheodore Ts'o es->s_last_error_func, 341266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 341366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3414651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 341566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 341666e61a9eSTheodore Ts'o if (es->s_last_error_block) 3417651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 341866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3419651e1c3bSJoe Perches printk(KERN_CONT "\n"); 342066e61a9eSTheodore Ts'o } 342166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 342266e61a9eSTheodore Ts'o } 342366e61a9eSTheodore Ts'o 3424bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3425bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3426bfff6873SLukas Czerner { 3427bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 34283d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 34293d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 34303d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 34313d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3432bfff6873SLukas Czerner int ret = 0; 343339fec688SShaoying Xu u64 start_time; 3434bfff6873SLukas Czerner 34353d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 34363d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 34373d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 34383d392b26STheodore Ts'o if (prefetch_ios) 34393d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 34403d392b26STheodore Ts'o prefetch_ios); 34413d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 34423d392b26STheodore Ts'o prefetch_ios); 34433d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 34443d392b26STheodore Ts'o ret = 1; 34453d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 34463d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 34473d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 34483d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 34493d392b26STheodore Ts'o ret = 0; 34503d392b26STheodore Ts'o } 34513d392b26STheodore Ts'o } 34523d392b26STheodore Ts'o return ret; 34533d392b26STheodore Ts'o } 3454bfff6873SLukas Czerner 34553d392b26STheodore Ts'o for (; group < ngroups; group++) { 3456bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3457bfff6873SLukas Czerner if (!gdp) { 3458bfff6873SLukas Czerner ret = 1; 3459bfff6873SLukas Czerner break; 3460bfff6873SLukas Czerner } 3461bfff6873SLukas Czerner 3462bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3463bfff6873SLukas Czerner break; 3464bfff6873SLukas Czerner } 3465bfff6873SLukas Czerner 34667f511862STheodore Ts'o if (group >= ngroups) 3467bfff6873SLukas Czerner ret = 1; 3468bfff6873SLukas Czerner 3469bfff6873SLukas Czerner if (!ret) { 347039fec688SShaoying Xu start_time = ktime_get_real_ns(); 3471bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3472bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 34733d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3474bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 347539fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 347639fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3477bfff6873SLukas Czerner } 3478bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3479bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3480bfff6873SLukas Czerner } 3481bfff6873SLukas Czerner return ret; 3482bfff6873SLukas Czerner } 3483bfff6873SLukas Czerner 3484bfff6873SLukas Czerner /* 3485bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 34864ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3487bfff6873SLukas Czerner */ 3488bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3489bfff6873SLukas Czerner { 3490bfff6873SLukas Czerner if (!elr) 3491bfff6873SLukas Czerner return; 3492bfff6873SLukas Czerner 3493bfff6873SLukas Czerner list_del(&elr->lr_request); 34943d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3495bfff6873SLukas Czerner kfree(elr); 3496bfff6873SLukas Czerner } 3497bfff6873SLukas Czerner 3498bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3499bfff6873SLukas Czerner { 35001bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 35011bb933fbSLukas Czerner if (!ext4_li_info) { 35021bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3503bfff6873SLukas Czerner return; 35041bb933fbSLukas Czerner } 3505bfff6873SLukas Czerner 3506bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 35071bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3508bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 35091bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3510bfff6873SLukas Czerner } 3511bfff6873SLukas Czerner 35128f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 35138f1f7453SEric Sandeen 3514bfff6873SLukas Czerner /* 3515bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3516bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3517bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3518bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3519bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3520bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3521bfff6873SLukas Czerner * next waking time and put itself into sleep. 3522bfff6873SLukas Czerner */ 3523bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3524bfff6873SLukas Czerner { 3525bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3526bfff6873SLukas Czerner struct list_head *pos, *n; 3527bfff6873SLukas Czerner struct ext4_li_request *elr; 35284ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3529bfff6873SLukas Czerner 3530bfff6873SLukas Czerner BUG_ON(NULL == eli); 3531bfff6873SLukas Czerner 3532bfff6873SLukas Czerner cont_thread: 3533bfff6873SLukas Czerner while (true) { 3534bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3535bfff6873SLukas Czerner 3536bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3537bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3538bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3539bfff6873SLukas Czerner goto exit_thread; 3540bfff6873SLukas Czerner } 3541bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3542e22834f0SDmitry Monakhov int err = 0; 3543e22834f0SDmitry Monakhov int progress = 0; 3544bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3545bfff6873SLukas Czerner lr_request); 3546bfff6873SLukas Czerner 3547e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3548e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3549e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3550e22834f0SDmitry Monakhov continue; 3551e22834f0SDmitry Monakhov } 3552e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3553e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3554e22834f0SDmitry Monakhov progress = 1; 3555e22834f0SDmitry Monakhov /* 3556e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3557e22834f0SDmitry Monakhov * be removed from the list, it is 3558e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3559e22834f0SDmitry Monakhov */ 3560e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3561e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3562e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3563e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3564e22834f0SDmitry Monakhov n = pos->next; 3565e22834f0SDmitry Monakhov } 3566e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3567e22834f0SDmitry Monakhov } 3568b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3569e22834f0SDmitry Monakhov if (err) { 3570bfff6873SLukas Czerner ext4_remove_li_request(elr); 3571bfff6873SLukas Czerner continue; 3572bfff6873SLukas Czerner } 3573e22834f0SDmitry Monakhov if (!progress) { 3574e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3575e22834f0SDmitry Monakhov (prandom_u32() 3576e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3577b2c78cd0STheodore Ts'o } 3578bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3579bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3580bfff6873SLukas Czerner } 3581bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3582bfff6873SLukas Czerner 3583a0acae0eSTejun Heo try_to_freeze(); 3584bfff6873SLukas Czerner 35854ed5c033SLukas Czerner cur = jiffies; 35864ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3587f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3588bfff6873SLukas Czerner cond_resched(); 3589bfff6873SLukas Czerner continue; 3590bfff6873SLukas Czerner } 3591bfff6873SLukas Czerner 35924ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 35934ed5c033SLukas Czerner 35948f1f7453SEric Sandeen if (kthread_should_stop()) { 35958f1f7453SEric Sandeen ext4_clear_request_list(); 35968f1f7453SEric Sandeen goto exit_thread; 35978f1f7453SEric Sandeen } 3598bfff6873SLukas Czerner } 3599bfff6873SLukas Czerner 3600bfff6873SLukas Czerner exit_thread: 3601bfff6873SLukas Czerner /* 3602bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3603bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3604bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3605bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3606bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3607bfff6873SLukas Czerner * new one. 3608bfff6873SLukas Czerner */ 3609bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3610bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3611bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3612bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3613bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3614bfff6873SLukas Czerner goto cont_thread; 3615bfff6873SLukas Czerner } 3616bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3617bfff6873SLukas Czerner kfree(ext4_li_info); 3618bfff6873SLukas Czerner ext4_li_info = NULL; 3619bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3620bfff6873SLukas Czerner 3621bfff6873SLukas Czerner return 0; 3622bfff6873SLukas Czerner } 3623bfff6873SLukas Czerner 3624bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3625bfff6873SLukas Czerner { 3626bfff6873SLukas Czerner struct list_head *pos, *n; 3627bfff6873SLukas Czerner struct ext4_li_request *elr; 3628bfff6873SLukas Czerner 3629bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3630bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3631bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3632bfff6873SLukas Czerner lr_request); 3633bfff6873SLukas Czerner ext4_remove_li_request(elr); 3634bfff6873SLukas Czerner } 3635bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3636bfff6873SLukas Czerner } 3637bfff6873SLukas Czerner 3638bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3639bfff6873SLukas Czerner { 36408f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 36418f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 36428f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 36438f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3644bfff6873SLukas Czerner ext4_clear_request_list(); 3645bfff6873SLukas Czerner kfree(ext4_li_info); 3646bfff6873SLukas Czerner ext4_li_info = NULL; 364792b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3648bfff6873SLukas Czerner "initialization thread\n", 3649bfff6873SLukas Czerner err); 3650bfff6873SLukas Czerner return err; 3651bfff6873SLukas Czerner } 3652bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3653bfff6873SLukas Czerner return 0; 3654bfff6873SLukas Czerner } 3655bfff6873SLukas Czerner 3656bfff6873SLukas Czerner /* 3657bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3658bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3659bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3660bfff6873SLukas Czerner * groups and return total number of groups. 3661bfff6873SLukas Czerner */ 3662bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3663bfff6873SLukas Czerner { 3664bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3665bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3666bfff6873SLukas Czerner 36678844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 36688844618dSTheodore Ts'o return ngroups; 36698844618dSTheodore Ts'o 3670bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3671bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3672bfff6873SLukas Czerner if (!gdp) 3673bfff6873SLukas Czerner continue; 3674bfff6873SLukas Czerner 367550122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3676bfff6873SLukas Czerner break; 3677bfff6873SLukas Czerner } 3678bfff6873SLukas Czerner 3679bfff6873SLukas Czerner return group; 3680bfff6873SLukas Czerner } 3681bfff6873SLukas Czerner 3682bfff6873SLukas Czerner static int ext4_li_info_new(void) 3683bfff6873SLukas Czerner { 3684bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3685bfff6873SLukas Czerner 3686bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3687bfff6873SLukas Czerner if (!eli) 3688bfff6873SLukas Czerner return -ENOMEM; 3689bfff6873SLukas Czerner 3690bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3691bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3692bfff6873SLukas Czerner 3693bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3694bfff6873SLukas Czerner 3695bfff6873SLukas Czerner ext4_li_info = eli; 3696bfff6873SLukas Czerner 3697bfff6873SLukas Czerner return 0; 3698bfff6873SLukas Czerner } 3699bfff6873SLukas Czerner 3700bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3701bfff6873SLukas Czerner ext4_group_t start) 3702bfff6873SLukas Czerner { 3703bfff6873SLukas Czerner struct ext4_li_request *elr; 3704bfff6873SLukas Czerner 3705bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3706bfff6873SLukas Czerner if (!elr) 3707bfff6873SLukas Czerner return NULL; 3708bfff6873SLukas Czerner 3709bfff6873SLukas Czerner elr->lr_super = sb; 37103d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 371121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 37123d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3713bfff6873SLukas Czerner elr->lr_next_group = start; 371421175ca4SHarshad Shirwadkar } else { 371521175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 37163d392b26STheodore Ts'o } 3717bfff6873SLukas Czerner 3718bfff6873SLukas Czerner /* 3719bfff6873SLukas Czerner * Randomize first schedule time of the request to 3720bfff6873SLukas Czerner * spread the inode table initialization requests 3721bfff6873SLukas Czerner * better. 3722bfff6873SLukas Czerner */ 3723dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3724dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3725bfff6873SLukas Czerner return elr; 3726bfff6873SLukas Czerner } 3727bfff6873SLukas Czerner 37287f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3729bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3730bfff6873SLukas Czerner { 3731bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 37327f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 373349598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 37346c5a6cb9SAndrew Morton int ret = 0; 3735bfff6873SLukas Czerner 37367f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 373751ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 373851ce6511SLukas Czerner /* 373951ce6511SLukas Czerner * Reset timeout so it can be computed again, because 374051ce6511SLukas Czerner * s_li_wait_mult might have changed. 374151ce6511SLukas Czerner */ 374251ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 37437f511862STheodore Ts'o goto out; 374451ce6511SLukas Czerner } 3745bfff6873SLukas Czerner 374621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 37473d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 37483d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 37497f511862STheodore Ts'o goto out; 3750bfff6873SLukas Czerner 3751bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 37527f511862STheodore Ts'o if (!elr) { 37537f511862STheodore Ts'o ret = -ENOMEM; 37547f511862STheodore Ts'o goto out; 37557f511862STheodore Ts'o } 3756bfff6873SLukas Czerner 3757bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3758bfff6873SLukas Czerner ret = ext4_li_info_new(); 3759bfff6873SLukas Czerner if (ret) 3760bfff6873SLukas Czerner goto out; 3761bfff6873SLukas Czerner } 3762bfff6873SLukas Czerner 3763bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3764bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3765bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3766bfff6873SLukas Czerner 3767bfff6873SLukas Czerner sbi->s_li_request = elr; 376846e4690bSTao Ma /* 376946e4690bSTao Ma * set elr to NULL here since it has been inserted to 377046e4690bSTao Ma * the request_list and the removal and free of it is 377146e4690bSTao Ma * handled by ext4_clear_request_list from now on. 377246e4690bSTao Ma */ 377346e4690bSTao Ma elr = NULL; 3774bfff6873SLukas Czerner 3775bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3776bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3777bfff6873SLukas Czerner if (ret) 3778bfff6873SLukas Czerner goto out; 3779bfff6873SLukas Czerner } 3780bfff6873SLukas Czerner out: 3781bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3782beed5ecbSNicolas Kaiser if (ret) 3783bfff6873SLukas Czerner kfree(elr); 3784bfff6873SLukas Czerner return ret; 3785bfff6873SLukas Czerner } 3786bfff6873SLukas Czerner 3787bfff6873SLukas Czerner /* 3788bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3789bfff6873SLukas Czerner * module unload. 3790bfff6873SLukas Czerner */ 3791bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3792bfff6873SLukas Czerner { 3793bfff6873SLukas Czerner /* 3794bfff6873SLukas Czerner * If thread exited earlier 3795bfff6873SLukas Czerner * there's nothing to be done. 3796bfff6873SLukas Czerner */ 37978f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3798bfff6873SLukas Czerner return; 3799bfff6873SLukas Czerner 38008f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3801bfff6873SLukas Czerner } 3802bfff6873SLukas Czerner 380325ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 380425ed6e8aSDarrick J. Wong { 380525ed6e8aSDarrick J. Wong int ret = 1; 380625ed6e8aSDarrick J. Wong int compat, incompat; 380725ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 380825ed6e8aSDarrick J. Wong 38099aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3810db9ee220SDarrick J. Wong /* journal checksum v3 */ 381125ed6e8aSDarrick J. Wong compat = 0; 3812db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 381325ed6e8aSDarrick J. Wong } else { 381425ed6e8aSDarrick J. Wong /* journal checksum v1 */ 381525ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 381625ed6e8aSDarrick J. Wong incompat = 0; 381725ed6e8aSDarrick J. Wong } 381825ed6e8aSDarrick J. Wong 3819feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3820feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3821feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3822feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 382325ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 382425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 382525ed6e8aSDarrick J. Wong compat, 0, 382625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 382725ed6e8aSDarrick J. Wong incompat); 382825ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 382925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 383025ed6e8aSDarrick J. Wong compat, 0, 383125ed6e8aSDarrick J. Wong incompat); 383225ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 383325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 383425ed6e8aSDarrick J. Wong } else { 3835feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3836feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 383725ed6e8aSDarrick J. Wong } 383825ed6e8aSDarrick J. Wong 383925ed6e8aSDarrick J. Wong return ret; 384025ed6e8aSDarrick J. Wong } 384125ed6e8aSDarrick J. Wong 3842952fc18eSTheodore Ts'o /* 3843952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3844952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3845952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3846952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3847952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3848952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3849952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3850952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3851952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3852952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3853952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3854952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3855952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3856952fc18eSTheodore Ts'o */ 3857952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3858952fc18eSTheodore Ts'o char *buf) 3859952fc18eSTheodore Ts'o { 3860952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3861952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3862952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3863952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3864952fc18eSTheodore Ts'o int s, j, count = 0; 3865952fc18eSTheodore Ts'o 3866e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 38670548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 38680548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 38690548bbb8STheodore Ts'o 3870952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3871952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3872952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3873952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3874952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3875952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3876952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3877952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3878952fc18eSTheodore Ts'o count++; 3879952fc18eSTheodore Ts'o } 3880952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3881952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3882952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3883952fc18eSTheodore Ts'o count++; 3884952fc18eSTheodore Ts'o } 3885952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3886952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3887952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3888952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3889952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3890952fc18eSTheodore Ts'o count++; 3891952fc18eSTheodore Ts'o } 3892952fc18eSTheodore Ts'o if (i != grp) 3893952fc18eSTheodore Ts'o continue; 3894952fc18eSTheodore Ts'o s = 0; 3895952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3896952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3897952fc18eSTheodore Ts'o count++; 3898952fc18eSTheodore Ts'o } 3899c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3900c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3901c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3902c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3903c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3904952fc18eSTheodore Ts'o } 3905c48ae41bSTheodore Ts'o count += j; 3906c48ae41bSTheodore Ts'o for (; j > 0; j--) 3907c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3908952fc18eSTheodore Ts'o } 3909952fc18eSTheodore Ts'o if (!count) 3910952fc18eSTheodore Ts'o return 0; 3911952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3912952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3913952fc18eSTheodore Ts'o } 3914952fc18eSTheodore Ts'o 3915952fc18eSTheodore Ts'o /* 3916952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3917952fc18eSTheodore Ts'o */ 3918952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3919952fc18eSTheodore Ts'o { 3920952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3921952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 39223c816dedSEric Whitney struct inode *j_inode; 39233c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3924952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3925952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 39264fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3927952fc18eSTheodore Ts'o 3928952fc18eSTheodore Ts'o if (!buf) 3929952fc18eSTheodore Ts'o return -ENOMEM; 3930952fc18eSTheodore Ts'o 3931952fc18eSTheodore Ts'o /* 3932952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3933952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3934952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3935952fc18eSTheodore Ts'o */ 3936952fc18eSTheodore Ts'o 3937952fc18eSTheodore Ts'o /* 3938952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3939952fc18eSTheodore Ts'o */ 3940952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3941952fc18eSTheodore Ts'o 3942952fc18eSTheodore Ts'o /* 3943952fc18eSTheodore Ts'o * Add the overhead found in each block group 3944952fc18eSTheodore Ts'o */ 3945952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3946952fc18eSTheodore Ts'o int blks; 3947952fc18eSTheodore Ts'o 3948952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3949952fc18eSTheodore Ts'o overhead += blks; 3950952fc18eSTheodore Ts'o if (blks) 3951952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3952952fc18eSTheodore Ts'o cond_resched(); 3953952fc18eSTheodore Ts'o } 39543c816dedSEric Whitney 39553c816dedSEric Whitney /* 39563c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 39573c816dedSEric Whitney * loaded or not 39583c816dedSEric Whitney */ 3959ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 3960ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 3961f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 3962f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 39633c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 39643c816dedSEric Whitney if (j_inode) { 39653c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 39663c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 39673c816dedSEric Whitney iput(j_inode); 39683c816dedSEric Whitney } else { 39693c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 39703c816dedSEric Whitney } 39713c816dedSEric Whitney } 3972952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3973952fc18eSTheodore Ts'o smp_wmb(); 3974952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3975952fc18eSTheodore Ts'o return 0; 3976952fc18eSTheodore Ts'o } 3977952fc18eSTheodore Ts'o 3978b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 397927dd4385SLukas Czerner { 398027dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3981b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 398227dd4385SLukas Czerner 398327dd4385SLukas Czerner /* 398430fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 398530fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 398630fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 398730fac0f7SJan Kara * to keep ext2/3 backward compatibility. 398830fac0f7SJan Kara */ 3989e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3990b5799018STheodore Ts'o return; 399130fac0f7SJan Kara /* 399227dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 399327dd4385SLukas Czerner * This should cover the situations where we can not afford to run 399427dd4385SLukas Czerner * out of space like for example punch hole, or converting 3995556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 399627dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 399727dd4385SLukas Czerner * very rare. 399827dd4385SLukas Czerner */ 3999b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4000b5799018STheodore Ts'o sbi->s_cluster_bits); 400127dd4385SLukas Czerner 400227dd4385SLukas Czerner do_div(resv_clusters, 50); 400327dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 400427dd4385SLukas Czerner 4005b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 400627dd4385SLukas Czerner } 400727dd4385SLukas Czerner 4008ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4009ca9b404fSRoman Anufriev { 4010ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4011ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4012ca9b404fSRoman Anufriev return "none"; 4013ca9b404fSRoman Anufriev 4014ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4015ca9b404fSRoman Anufriev return "journalled"; 4016ca9b404fSRoman Anufriev else 4017ca9b404fSRoman Anufriev return "writeback"; 4018ca9b404fSRoman Anufriev #else 4019ca9b404fSRoman Anufriev return "disabled"; 4020ca9b404fSRoman Anufriev #endif 4021ca9b404fSRoman Anufriev } 4022ca9b404fSRoman Anufriev 4023188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4024188c299eSJan Kara enum ext4_journal_trigger_type type, 4025188c299eSJan Kara void (*trigger)( 4026188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4027188c299eSJan Kara struct buffer_head *bh, 4028188c299eSJan Kara void *mapped_data, 4029188c299eSJan Kara size_t size)) 4030188c299eSJan Kara { 4031188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4032188c299eSJan Kara 4033188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4034188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4035188c299eSJan Kara } 4036188c299eSJan Kara 4037617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 4038ac27a0ecSDave Kleikamp { 40395e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 4040d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 40411d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4042617ba13bSMingming Cao struct ext4_super_block *es = NULL; 40435aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 40447c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4045617ba13bSMingming Cao ext4_fsblk_t block; 4046617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 404770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4048ac27a0ecSDave Kleikamp unsigned long offset = 0; 4049ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4050ac27a0ecSDave Kleikamp struct inode *root; 40510390131bSFrank Mayhar const char *descr; 4052dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4053281b5995STheodore Ts'o int blocksize, clustersize; 40544ec11028STheodore Ts'o unsigned int db_count; 40554ec11028STheodore Ts'o unsigned int i; 4056ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4057bd81d8eeSLaurent Vivier __u64 blocks_count; 405807aa2ea1SLukas Czerner int err = 0; 4059bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4060b237e304SHarshad Shirwadkar struct ext4_parsed_options parsed_opts; 4061b237e304SHarshad Shirwadkar 4062b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4063b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4064b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 4065196e402aSHarshad Shirwadkar parsed_opts.mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4066ac27a0ecSDave Kleikamp 40675aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 40685aee0f8aSTheodore Ts'o goto out_free_base; 4069705895b6SPekka Enberg 4070aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 4071705895b6SPekka Enberg sbi->s_blockgroup_lock = 4072705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 40735aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 40745aee0f8aSTheodore Ts'o goto out_free_base; 40755aee0f8aSTheodore Ts'o 4076ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 40772c0544b2STheodore Ts'o sbi->s_sb = sb; 4078240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4079d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 4080f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 40818446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4082ac27a0ecSDave Kleikamp 40839f6200bbSTheodore Ts'o /* Cleanup superblock name */ 4084ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 40859f6200bbSTheodore Ts'o 408607aa2ea1SLukas Czerner /* -EINVAL is default */ 4087dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4088617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4089ac27a0ecSDave Kleikamp if (!blocksize) { 4090b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4091ac27a0ecSDave Kleikamp goto out_fail; 4092ac27a0ecSDave Kleikamp } 4093ac27a0ecSDave Kleikamp 4094ac27a0ecSDave Kleikamp /* 4095617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4096ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4097ac27a0ecSDave Kleikamp */ 4098617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 409970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 410070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4101ac27a0ecSDave Kleikamp } else { 410270bbb3e0SAndrew Morton logical_sb_block = sb_block; 4103ac27a0ecSDave Kleikamp } 4104ac27a0ecSDave Kleikamp 41058394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 41068394a6abSzhangyi (F) if (IS_ERR(bh)) { 4107b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 41088394a6abSzhangyi (F) ret = PTR_ERR(bh); 4109ac27a0ecSDave Kleikamp goto out_fail; 4110ac27a0ecSDave Kleikamp } 4111ac27a0ecSDave Kleikamp /* 4112ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4113617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4114ac27a0ecSDave Kleikamp */ 41152716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4116ac27a0ecSDave Kleikamp sbi->s_es = es; 4117ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4118617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4119617ba13bSMingming Cao goto cantfind_ext4; 4120afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4121ac27a0ecSDave Kleikamp 4122feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4123e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4124e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4125363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4126feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4127feb0ab32SDarrick J. Wong 4128d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4129d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4130d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4131d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4132d25425f8SDarrick J. Wong silent = 1; 4133d25425f8SDarrick J. Wong goto cantfind_ext4; 4134d25425f8SDarrick J. Wong } 413502f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 413602f310fcSJan Kara ext4_orphan_file_block_trigger); 4137d25425f8SDarrick J. Wong 41380441984aSDarrick J. Wong /* Load the checksum driver */ 41390441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 41400441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 41410441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 41420441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 41430441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 41440441984aSDarrick J. Wong goto failed_mount; 41450441984aSDarrick J. Wong } 41460441984aSDarrick J. Wong 4147a9c47317SDarrick J. Wong /* Check superblock checksum */ 4148a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4149a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4150a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4151a9c47317SDarrick J. Wong silent = 1; 41526a797d27SDarrick J. Wong ret = -EFSBADCRC; 4153a9c47317SDarrick J. Wong goto cantfind_ext4; 4154a9c47317SDarrick J. Wong } 4155a9c47317SDarrick J. Wong 4156a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4157e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 41588c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4159dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4160a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4161a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4162a9c47317SDarrick J. Wong 4163ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4164ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4165fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4166617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4167fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 416887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4169fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4170617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4171fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4172ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4173fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 417403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4175fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 41762e7842b8SHugh Dickins #endif 4177995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4178995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 417998c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 418098c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 418198c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 418298c1a759SDarrick J. Wong 4183617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4184fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4185617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4186fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4187617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4188fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4189ac27a0ecSDave Kleikamp 4190617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4191fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4192bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4193fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4194bb4f397aSAneesh Kumar K.V else 4195fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 419645f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4197fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 41988b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4199fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4200ac27a0ecSDave Kleikamp 420108cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 420208cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 420330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 420430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 420530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4206ac27a0ecSDave Kleikamp 42078b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4208fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4209ac27a0ecSDave Kleikamp 42101e2462f9SMingming Cao /* 4211dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4212dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4213dd919b98SAneesh Kumar K.V */ 4214bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 42158b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4216fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4217dd919b98SAneesh Kumar K.V 421851ce6511SLukas Czerner /* 421951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 422051ce6511SLukas Czerner * no mount option specified. 422151ce6511SLukas Czerner */ 422251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 422351ce6511SLukas Czerner 4224c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4225c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4226c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4227c9200760STheodore Ts'o "Invalid log block size: %u", 4228c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4229c9200760STheodore Ts'o goto failed_mount; 4230c9200760STheodore Ts'o } 4231c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4232c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4233c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4234c9200760STheodore Ts'o "Invalid log cluster size: %u", 4235c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4236c9200760STheodore Ts'o goto failed_mount; 4237c9200760STheodore Ts'o } 4238c9200760STheodore Ts'o 4239c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4240626b035bSRitesh Harjani 4241626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4242626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4243626b035bSRitesh Harjani 42449803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 42459803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 42469803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 42479803387cSTheodore Ts'o } else { 42489803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 42499803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 42509803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 42519803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 42529803387cSTheodore Ts'o sbi->s_first_ino); 42539803387cSTheodore Ts'o goto failed_mount; 42549803387cSTheodore Ts'o } 42559803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 42569803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 42579803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 42589803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42599803387cSTheodore Ts'o "unsupported inode size: %d", 42609803387cSTheodore Ts'o sbi->s_inode_size); 42614f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 42629803387cSTheodore Ts'o goto failed_mount; 42639803387cSTheodore Ts'o } 42649803387cSTheodore Ts'o /* 42659803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 42669803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 42679803387cSTheodore Ts'o * field should suffice to ensure we have extra space 42689803387cSTheodore Ts'o * for all three. 42699803387cSTheodore Ts'o */ 42709803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 42719803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 42729803387cSTheodore Ts'o sb->s_time_gran = 1; 42739803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 42749803387cSTheodore Ts'o } else { 42759803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 42769803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 42779803387cSTheodore Ts'o } 42789803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 42799803387cSTheodore Ts'o } 42809803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 42819803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 42829803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 42839803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 42849803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 42859803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 42869803387cSTheodore Ts'o 42879803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 42889803387cSTheodore Ts'o if (v > max) { 42899803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42909803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 42919803387cSTheodore Ts'o goto failed_mount; 42929803387cSTheodore Ts'o } 42939803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 42949803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 42959803387cSTheodore Ts'o 42969803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 42979803387cSTheodore Ts'o if (v > max) { 42989803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42999803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 43009803387cSTheodore Ts'o goto failed_mount; 43019803387cSTheodore Ts'o } 43029803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 43039803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 43049803387cSTheodore Ts'o } 43059803387cSTheodore Ts'o } 43069803387cSTheodore Ts'o 43075aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 43085aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 43095aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 43105aee0f8aSTheodore Ts'o GFP_KERNEL); 43115aee0f8aSTheodore Ts'o if (!s_mount_opts) 43125aee0f8aSTheodore Ts'o goto failed_mount; 4313b237e304SHarshad Shirwadkar if (!parse_options(s_mount_opts, sb, &parsed_opts, 0)) { 43148b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 43158b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 43165aee0f8aSTheodore Ts'o s_mount_opts); 43175aee0f8aSTheodore Ts'o } 43185aee0f8aSTheodore Ts'o kfree(s_mount_opts); 43198b67f04aSTheodore Ts'o } 43205a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 4321b237e304SHarshad Shirwadkar if (!parse_options((char *) data, sb, &parsed_opts, 0)) 4322ac27a0ecSDave Kleikamp goto failed_mount; 4323ac27a0ecSDave Kleikamp 4324c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4325f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4326c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4327c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4328c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4329c83ad55eSGabriel Krisman Bertazi 4330c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4331c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4332c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4333c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4334c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4335c83ad55eSGabriel Krisman Bertazi } 4336c83ad55eSGabriel Krisman Bertazi 4337c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4338c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4339c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4340c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4341c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4342c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4343c83ad55eSGabriel Krisman Bertazi encoding_flags); 4344c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4345c83ad55eSGabriel Krisman Bertazi } 4346c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4347c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4348c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4349c83ad55eSGabriel Krisman Bertazi 4350f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4351f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4352c83ad55eSGabriel Krisman Bertazi } 4353c83ad55eSGabriel Krisman Bertazi #endif 4354c83ad55eSGabriel Krisman Bertazi 435556889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4356556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4357781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4358244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4359556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 436056889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 436156889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 436256889787STheodore Ts'o "both data=journal and delalloc"); 436356889787STheodore Ts'o goto failed_mount; 436456889787STheodore Ts'o } 4365fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4366923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4367923ae0ffSRoss Zwisler "both data=journal and dax"); 4368923ae0ffSRoss Zwisler goto failed_mount; 4369923ae0ffSRoss Zwisler } 437073b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 437173b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 437273b92a2aSSergey Karamov "encrypted files will use data=ordered " 437373b92a2aSSergey Karamov "instead of data journaling mode"); 437473b92a2aSSergey Karamov } 437556889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 437656889787STheodore Ts'o clear_opt(sb, DELALLOC); 4377001e4a87STejun Heo } else { 4378001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 437956889787STheodore Ts'o } 438056889787STheodore Ts'o 43811751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 43821751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4383ac27a0ecSDave Kleikamp 4384617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4385e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4386e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4387e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4388b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4389b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4390b31e1552SEric Sandeen "running e2fsck is recommended"); 4391469108ffSTheodore Tso 4392ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4393ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4394e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4395ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4396ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4397ed3654ebSTheodore Ts'o goto failed_mount; 4398ed3654ebSTheodore Ts'o } 4399dec214d0STahsin Erdogan 4400dec214d0STahsin Erdogan /* 4401dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4402dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4403dec214d0STahsin Erdogan */ 4404dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4405dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4406dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4407dec214d0STahsin Erdogan goto failed_mount; 4408dec214d0STahsin Erdogan } 4409ed3654ebSTheodore Ts'o } 4410ed3654ebSTheodore Ts'o 44112035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 44122035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 44132035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 44142035e776STheodore Ts'o "using the ext4 subsystem"); 44152035e776STheodore Ts'o else { 44160d9366d6SEric Sandeen /* 44170d9366d6SEric Sandeen * If we're probing be silent, if this looks like 44180d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 44190d9366d6SEric Sandeen */ 44200d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 44210d9366d6SEric Sandeen goto failed_mount; 44222035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 44232035e776STheodore Ts'o "to feature incompatibilities"); 44242035e776STheodore Ts'o goto failed_mount; 44252035e776STheodore Ts'o } 44262035e776STheodore Ts'o } 44272035e776STheodore Ts'o 44282035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 44292035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 44302035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 44312035e776STheodore Ts'o "using the ext4 subsystem"); 44322035e776STheodore Ts'o else { 44330d9366d6SEric Sandeen /* 44340d9366d6SEric Sandeen * If we're probing be silent, if this looks like 44350d9366d6SEric Sandeen * it's actually an ext4 filesystem. 44360d9366d6SEric Sandeen */ 44370d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 44380d9366d6SEric Sandeen goto failed_mount; 44392035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 44402035e776STheodore Ts'o "to feature incompatibilities"); 44412035e776STheodore Ts'o goto failed_mount; 44422035e776STheodore Ts'o } 44432035e776STheodore Ts'o } 44442035e776STheodore Ts'o 4445469108ffSTheodore Tso /* 4446ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4447ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4448ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4449ac27a0ecSDave Kleikamp */ 4450bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4451ac27a0ecSDave Kleikamp goto failed_mount; 4452a13fb1a4SEric Sandeen 44535b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 44545b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 44555b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 44565b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 44575b9554dcSTheodore Ts'o goto failed_mount; 44585b9554dcSTheodore Ts'o } 44595b9554dcSTheodore Ts'o 4460bdd3c50dSChristoph Hellwig if (dax_supported(dax_dev, sb->s_bdev, blocksize, 0, 4461bdd3c50dSChristoph Hellwig bdev_nr_sectors(sb->s_bdev))) 4462a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4463a8ab6d38SIra Weiny 4464fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4465559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4466559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4467559db4c6SRoss Zwisler " that may contain inline data"); 4468361d24d4SEric Sandeen goto failed_mount; 4469559db4c6SRoss Zwisler } 4470a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 447124f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4472361d24d4SEric Sandeen "DAX unsupported by block device."); 4473361d24d4SEric Sandeen goto failed_mount; 447424f3478dSDan Williams } 4475923ae0ffSRoss Zwisler } 4476923ae0ffSRoss Zwisler 4477e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 44786ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 44796ddb2447STheodore Ts'o es->s_encryption_level); 44806ddb2447STheodore Ts'o goto failed_mount; 44816ddb2447STheodore Ts'o } 44826ddb2447STheodore Ts'o 4483ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4484afd09b61SAlexey Makhalov /* 4485afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4486afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4487afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4488afd09b61SAlexey Makhalov */ 4489afd09b61SAlexey Makhalov brelse(bh); 4490ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4491ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4492b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4493ce40733cSAneesh Kumar K.V blocksize); 4494afd09b61SAlexey Makhalov bh = NULL; 4495ac27a0ecSDave Kleikamp goto failed_mount; 4496ac27a0ecSDave Kleikamp } 4497ac27a0ecSDave Kleikamp 449870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 449970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 45008394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 45018394a6abSzhangyi (F) if (IS_ERR(bh)) { 4502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4503b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 45048394a6abSzhangyi (F) ret = PTR_ERR(bh); 45058394a6abSzhangyi (F) bh = NULL; 4506ac27a0ecSDave Kleikamp goto failed_mount; 4507ac27a0ecSDave Kleikamp } 45082716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4509ac27a0ecSDave Kleikamp sbi->s_es = es; 4510617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4511b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4512b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4513ac27a0ecSDave Kleikamp goto failed_mount; 4514ac27a0ecSDave Kleikamp } 4515ac27a0ecSDave Kleikamp } 4516ac27a0ecSDave Kleikamp 4517e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4518f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4519f287a1a5STheodore Ts'o has_huge_files); 4520f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4521ac27a0ecSDave Kleikamp 45220d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4523e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 45248fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 45250d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4526d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4527b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4528b31e1552SEric Sandeen "unsupported descriptor size %lu", 45290d1ee42fSAlexandre Ratchov sbi->s_desc_size); 45300d1ee42fSAlexandre Ratchov goto failed_mount; 45310d1ee42fSAlexandre Ratchov } 45320d1ee42fSAlexandre Ratchov } else 45330d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 45340b8e58a1SAndreas Dilger 4535ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4536ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 45370b8e58a1SAndreas Dilger 4538617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4539ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4540617ba13bSMingming Cao goto cantfind_ext4; 4541cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4542cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4543cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4544b9c538daSJosh Triplett sbi->s_inodes_per_group); 4545cd6bb35bSTheodore Ts'o goto failed_mount; 4546cd6bb35bSTheodore Ts'o } 4547ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4548ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 45490d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4550ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4551ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4552e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4553e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 45540b8e58a1SAndreas Dilger 4555ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4556ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4557ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4558e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4559f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4560f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4561f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4562f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4563f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4564bc98a42cSDavid Howells if (!sb_rdonly(sb)) 456523301410STheodore Ts'o es->s_flags |= 456623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4567f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4568f99b2589STheodore Ts'o #else 4569bc98a42cSDavid Howells if (!sb_rdonly(sb)) 457023301410STheodore Ts'o es->s_flags |= 457123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4572f99b2589STheodore Ts'o #endif 4573f99b2589STheodore Ts'o } 457423301410STheodore Ts'o } 4575ac27a0ecSDave Kleikamp 4576281b5995STheodore Ts'o /* Handle clustersize */ 4577281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4578ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4579281b5995STheodore Ts'o if (clustersize < blocksize) { 4580281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4581281b5995STheodore Ts'o "cluster size (%d) smaller than " 4582281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4583281b5995STheodore Ts'o goto failed_mount; 4584281b5995STheodore Ts'o } 4585281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4586281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4587281b5995STheodore Ts'o sbi->s_clusters_per_group = 4588281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4589281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4590281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4591281b5995STheodore Ts'o "#clusters per group too big: %lu", 4592281b5995STheodore Ts'o sbi->s_clusters_per_group); 4593281b5995STheodore Ts'o goto failed_mount; 4594281b5995STheodore Ts'o } 4595281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4596281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4597281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4598281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4599281b5995STheodore Ts'o sbi->s_blocks_per_group, 4600281b5995STheodore Ts'o sbi->s_clusters_per_group); 4601281b5995STheodore Ts'o goto failed_mount; 4602281b5995STheodore Ts'o } 4603281b5995STheodore Ts'o } else { 4604281b5995STheodore Ts'o if (clustersize != blocksize) { 4605bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4606bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4607bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4608bfe0a5f4STheodore Ts'o goto failed_mount; 4609281b5995STheodore Ts'o } 4610ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4611b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4612b31e1552SEric Sandeen "#blocks per group too big: %lu", 4613ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4614ac27a0ecSDave Kleikamp goto failed_mount; 4615ac27a0ecSDave Kleikamp } 4616281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4617281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4618281b5995STheodore Ts'o } 4619281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4620281b5995STheodore Ts'o 4621960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4622960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4623960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4624960fd856STheodore Ts'o 4625bf43d84bSEric Sandeen /* 4626bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4627bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4628bf43d84bSEric Sandeen */ 46295a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 463030ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 46315a9ae68aSDarrick J. Wong if (err) { 4632b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4633bf43d84bSEric Sandeen " too large to mount safely on this system"); 4634ac27a0ecSDave Kleikamp goto failed_mount; 4635ac27a0ecSDave Kleikamp } 4636ac27a0ecSDave Kleikamp 4637617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4638617ba13bSMingming Cao goto cantfind_ext4; 4639e7c95593SEric Sandeen 46400f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 46415513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 46420f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4643b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4644b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 46450f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 46460f2ddca6SFrom: Thiemo Nagel goto failed_mount; 46470f2ddca6SFrom: Thiemo Nagel } 46480f2ddca6SFrom: Thiemo Nagel 46494ec11028STheodore Ts'o /* 46504ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 46514ec11028STheodore Ts'o * of the filesystem. 46524ec11028STheodore Ts'o */ 46534ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4654b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4655b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4656e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 46574ec11028STheodore Ts'o ext4_blocks_count(es)); 4658e7c95593SEric Sandeen goto failed_mount; 4659e7c95593SEric Sandeen } 4660bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4661bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4662bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4663bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4664bfe0a5f4STheodore Ts'o goto failed_mount; 4665bfe0a5f4STheodore Ts'o } 4666bfe0a5f4STheodore Ts'o 4667bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4668bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4669bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4670bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 46714ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4672df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 46734ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4674df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 46754ec11028STheodore Ts'o ext4_blocks_count(es), 46764ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 46774ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 46784ec11028STheodore Ts'o goto failed_mount; 46794ec11028STheodore Ts'o } 4680bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4681fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4682fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 46839e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 46849e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 46859e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 46869e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 46879e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 46889e463084STheodore Ts'o ret = -EINVAL; 46899e463084STheodore Ts'o goto failed_mount; 46909e463084STheodore Ts'o } 4691617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4692617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 46933a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 46942ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 46953a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 46963a4b77cdSEryu Guan "first meta block group too large: %u " 46973a4b77cdSEryu Guan "(group descriptor block count %u)", 46983a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 46993a4b77cdSEryu Guan goto failed_mount; 47003a4b77cdSEryu Guan } 47013a4b77cdSEryu Guan } 47021d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 47031d0c3924STheodore Ts'o kvmalloc_array(db_count, 4704f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 47051d0c3924STheodore Ts'o GFP_KERNEL)); 4706ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4707b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 47082cde417dSTheodore Ts'o ret = -ENOMEM; 4709ac27a0ecSDave Kleikamp goto failed_mount; 4710ac27a0ecSDave Kleikamp } 4711ac27a0ecSDave Kleikamp 4712705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4713ac27a0ecSDave Kleikamp 471485c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 471585c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 471685c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 47175df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 471885c8f176SAndrew Perepechko } 471985c8f176SAndrew Perepechko 4720ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 47211d0c3924STheodore Ts'o struct buffer_head *bh; 47221d0c3924STheodore Ts'o 472370bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 47248394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 47258394a6abSzhangyi (F) if (IS_ERR(bh)) { 4726b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4727b31e1552SEric Sandeen "can't read group descriptor %d", i); 4728ac27a0ecSDave Kleikamp db_count = i; 47298394a6abSzhangyi (F) ret = PTR_ERR(bh); 4730ac27a0ecSDave Kleikamp goto failed_mount2; 4731ac27a0ecSDave Kleikamp } 47321d0c3924STheodore Ts'o rcu_read_lock(); 47331d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 47341d0c3924STheodore Ts'o rcu_read_unlock(); 4735ac27a0ecSDave Kleikamp } 473644de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4737829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4738b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 47396a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4740f9ae9cf5STheodore Ts'o goto failed_mount2; 4741ac27a0ecSDave Kleikamp } 4742772cb7c8SJose R. Santos 4743235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 4744c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 4745c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 474604496411STao Ma 4747a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4748eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4749ce7e010aSTheodore Ts'o goto failed_mount3; 4750ce7e010aSTheodore Ts'o 4751c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 475267a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4753c9de560dSAlex Tomas 4754f9ae9cf5STheodore Ts'o /* 4755f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4756f9ae9cf5STheodore Ts'o */ 4757f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4758617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4759617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4760643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 4761a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4762ffcc4182SEric Biggers #endif 4763c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 4764c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 4765c93d8f88SEric Biggers #endif 4766ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4767617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4768e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 47691fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4770262b4662SJan Kara else 4771262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4772689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4773ac27a0ecSDave Kleikamp #endif 477485787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4775f2fa2ffcSAneesh Kumar K.V 4776ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 47773b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4778ac27a0ecSDave Kleikamp 4779aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 4780aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 4781aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_ineligible_updates, 0); 4782aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4783aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4784aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4785aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4786aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 47879b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 47889b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 4789aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 4790aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 47918016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 47928016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 47938016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 47948016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 47958016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 47968016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 47978016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4798aa75f4d3SHarshad Shirwadkar 4799ac27a0ecSDave Kleikamp sb->s_root = NULL; 4800ac27a0ecSDave Kleikamp 4801ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 480202f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 4803e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4804ac27a0ecSDave Kleikamp 4805bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4806c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 480750460fe8SDarrick J. Wong goto failed_mount3a; 4808c5e06d10SJohann Lombardi 4809ac27a0ecSDave Kleikamp /* 4810ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4811ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4812ac27a0ecSDave Kleikamp */ 4813e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 4814b237e304SHarshad Shirwadkar err = ext4_load_journal(sb, es, parsed_opts.journal_devnum); 48154753d8a2STheodore Ts'o if (err) 481650460fe8SDarrick J. Wong goto failed_mount3a; 4817bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4818e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4819b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4820b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4821744692dcSJiaying Zhang goto failed_mount_wq; 4822ac27a0ecSDave Kleikamp } else { 48231e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 48241e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 48251e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48261e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 48271e381f60SDmitry Monakhov goto failed_mount_wq; 48281e381f60SDmitry Monakhov } 48291e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 48301e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48311e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 48321e381f60SDmitry Monakhov goto failed_mount_wq; 48331e381f60SDmitry Monakhov } 48341e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 48351e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48361e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 48371e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 48381e381f60SDmitry Monakhov goto failed_mount_wq; 48391e381f60SDmitry Monakhov } 48401e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 48411e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 48421e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48431e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 48441e381f60SDmitry Monakhov goto failed_mount_wq; 48451e381f60SDmitry Monakhov } 484650b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 48471e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4848fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 4849995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 48500390131bSFrank Mayhar sbi->s_journal = NULL; 48510390131bSFrank Mayhar needs_recovery = 0; 48520390131bSFrank Mayhar goto no_journal; 4853ac27a0ecSDave Kleikamp } 4854ac27a0ecSDave Kleikamp 4855e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4856eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4857eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4858b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4859744692dcSJiaying Zhang goto failed_mount_wq; 4860eb40a09cSJose R. Santos } 4861eb40a09cSJose R. Santos 486225ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 486325ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 486425ed6e8aSDarrick J. Wong "feature set"); 486525ed6e8aSDarrick J. Wong goto failed_mount_wq; 4866d4da6c9cSLinus Torvalds } 4867818d276cSGirish Shilamkar 4868a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 4869a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4870a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 4871a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 4872a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 4873a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 4874a1e5e465SHarshad Shirwadkar } 4875a1e5e465SHarshad Shirwadkar 4876ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4877ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4878ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4879ac27a0ecSDave Kleikamp case 0: 4880ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 488163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 488263f57933SAndrew Morton * cope, else JOURNAL_DATA 488363f57933SAndrew Morton */ 4884dab291afSMingming Cao if (jbd2_journal_check_available_features 488527f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4886fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 488727f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 488827f394a7STyson Nottingham } else { 4889fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 489027f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 489127f394a7STyson Nottingham } 4892ac27a0ecSDave Kleikamp break; 4893ac27a0ecSDave Kleikamp 4894617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4895617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4896dab291afSMingming Cao if (!jbd2_journal_check_available_features 4897dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4898b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4899b31e1552SEric Sandeen "requested data journaling mode"); 4900744692dcSJiaying Zhang goto failed_mount_wq; 4901ac27a0ecSDave Kleikamp } 49025a150bdeSGustavo A. R. Silva break; 4903ac27a0ecSDave Kleikamp default: 4904ac27a0ecSDave Kleikamp break; 4905ac27a0ecSDave Kleikamp } 4906ab04df78SJan Kara 4907ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4908ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4909ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4910ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4911ab04df78SJan Kara goto failed_mount_wq; 4912ab04df78SJan Kara } 4913ab04df78SJan Kara 4914b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 4915ac27a0ecSDave Kleikamp 4916342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 4917afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 4918342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 4919afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 492018aadd47SBobi Jam 4921ce7e010aSTheodore Ts'o no_journal: 4922cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 492347387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 492447387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4925cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4926cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 49279c191f70ST Makphaibulchoke goto failed_mount_wq; 49289c191f70ST Makphaibulchoke } 49299c191f70ST Makphaibulchoke 4930dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4931dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4932dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4933dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4934dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4935dec214d0STahsin Erdogan goto failed_mount_wq; 4936dec214d0STahsin Erdogan } 4937dec214d0STahsin Erdogan } 4938cdb7ee4cSTahsin Erdogan } 4939dec214d0STahsin Erdogan 4940c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 4941c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 4942c93d8f88SEric Biggers goto failed_mount_wq; 4943c93d8f88SEric Biggers } 4944c93d8f88SEric Biggers 4945bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4946e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4947e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 49484392fbc4SJan Kara ext4_commit_super(sb); 49496ddb2447STheodore Ts'o } 49506ddb2447STheodore Ts'o 4951fd89d5f2STejun Heo /* 4952952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4953952fc18eSTheodore Ts'o * superblock if present. 4954952fc18eSTheodore Ts'o */ 4955952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4956952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4957952fc18eSTheodore Ts'o else { 495807aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 495907aa2ea1SLukas Czerner if (err) 4960952fc18eSTheodore Ts'o goto failed_mount_wq; 4961952fc18eSTheodore Ts'o } 4962952fc18eSTheodore Ts'o 4963952fc18eSTheodore Ts'o /* 4964fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4965fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4966fd89d5f2STejun Heo */ 49672e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 49682e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 49692e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 49702e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 497107aa2ea1SLukas Czerner ret = -ENOMEM; 49722e8fa54eSJan Kara goto failed_mount4; 49732e8fa54eSJan Kara } 49742e8fa54eSJan Kara 4975ac27a0ecSDave Kleikamp /* 4976dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4977ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4978ac27a0ecSDave Kleikamp */ 4979ac27a0ecSDave Kleikamp 49808a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 49811d1fe1eeSDavid Howells if (IS_ERR(root)) { 4982b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 49831d1fe1eeSDavid Howells ret = PTR_ERR(root); 498432a9bb57SManish Katiyar root = NULL; 4985ac27a0ecSDave Kleikamp goto failed_mount4; 4986ac27a0ecSDave Kleikamp } 4987ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4988b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 498994bf608aSAl Viro iput(root); 4990ac27a0ecSDave Kleikamp goto failed_mount4; 4991ac27a0ecSDave Kleikamp } 4992b886ee3eSGabriel Krisman Bertazi 499348fde701SAl Viro sb->s_root = d_make_root(root); 49941d1fe1eeSDavid Howells if (!sb->s_root) { 4995b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 49961d1fe1eeSDavid Howells ret = -ENOMEM; 49971d1fe1eeSDavid Howells goto failed_mount4; 49981d1fe1eeSDavid Howells } 4999ac27a0ecSDave Kleikamp 5000c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5001c89128a0SJaegeuk Kim if (ret == -EROFS) { 50021751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5003c89128a0SJaegeuk Kim ret = 0; 5004c89128a0SJaegeuk Kim } else if (ret) 5005c89128a0SJaegeuk Kim goto failed_mount4a; 5006ef7f3835SKalpak Shah 5007b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 500827dd4385SLukas Czerner 50090f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 50106fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 50116fd058f7STheodore Ts'o if (err) { 5012b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5013fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5014f9ae9cf5STheodore Ts'o goto failed_mount4a; 5015f9ae9cf5STheodore Ts'o } 50160f5bde1dSJan Kara } 50178016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5018f9ae9cf5STheodore Ts'o 5019f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5020196e402aSHarshad Shirwadkar 5021196e402aSHarshad Shirwadkar /* 5022196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5023196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5024196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5025196e402aSHarshad Shirwadkar */ 5026196e402aSHarshad Shirwadkar if (parsed_opts.mb_optimize_scan == 1) 5027196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5028196e402aSHarshad Shirwadkar else if (parsed_opts.mb_optimize_scan == 0) 5029196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5030196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5031196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5032196e402aSHarshad Shirwadkar 5033f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5034f9ae9cf5STheodore Ts'o if (err) { 5035f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5036f9ae9cf5STheodore Ts'o err); 5037dcf2d804STao Ma goto failed_mount5; 5038c2774d84SAneesh Kumar K.V } 5039c2774d84SAneesh Kumar K.V 5040027f14f5STheodore Ts'o /* 5041027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5042027f14f5STheodore Ts'o * mballoc is initialized 5043027f14f5STheodore Ts'o */ 5044027f14f5STheodore Ts'o if (sbi->s_journal) 5045027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5046027f14f5STheodore Ts'o ext4_journal_commit_callback; 5047027f14f5STheodore Ts'o 5048d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5049d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5050d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5051908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5052908c7f19STejun Heo GFP_KERNEL); 5053d5e03cbbSTheodore Ts'o if (!err) { 5054d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5055d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5056908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5057908c7f19STejun Heo GFP_KERNEL); 5058d5e03cbbSTheodore Ts'o } 5059b2bbb92fSJan Kara /* 5060b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5061b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5062b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5063b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5064b2bbb92fSJan Kara * after it is mounted can fail. 5065b2bbb92fSJan Kara */ 5066b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5067d5e03cbbSTheodore Ts'o if (!err) 5068d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5069908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5070d5e03cbbSTheodore Ts'o if (!err) 5071908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5072908c7f19STejun Heo GFP_KERNEL); 5073c8585c6fSDaeho Jeong if (!err) 5074efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5075efc61345SEric Whitney GFP_KERNEL); 5076efc61345SEric Whitney if (!err) 5077bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5078c8585c6fSDaeho Jeong 5079d5e03cbbSTheodore Ts'o if (err) { 5080d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5081d5e03cbbSTheodore Ts'o goto failed_mount6; 5082d5e03cbbSTheodore Ts'o } 5083d5e03cbbSTheodore Ts'o 5084e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5085d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5086d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5087d5e03cbbSTheodore Ts'o "unable to initialize " 5088d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 50898f6840c4SYang Yingliang ret = -ENOMEM; 5090d5e03cbbSTheodore Ts'o goto failed_mount6; 5091d5e03cbbSTheodore Ts'o } 5092d5e03cbbSTheodore Ts'o 5093bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5094bfff6873SLukas Czerner if (err) 5095dcf2d804STao Ma goto failed_mount6; 5096bfff6873SLukas Czerner 5097b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5098dcf2d804STao Ma if (err) 5099dcf2d804STao Ma goto failed_mount7; 51003197ebdbSTheodore Ts'o 510102f310fcSJan Kara err = ext4_init_orphan_info(sb); 510202f310fcSJan Kara if (err) 510302f310fcSJan Kara goto failed_mount8; 51049b2ff357SJan Kara #ifdef CONFIG_QUOTA 51059b2ff357SJan Kara /* Enable quota usage during mount. */ 5106bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 51079b2ff357SJan Kara err = ext4_enable_quotas(sb); 51089b2ff357SJan Kara if (err) 510902f310fcSJan Kara goto failed_mount9; 51109b2ff357SJan Kara } 51119b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 51129b2ff357SJan Kara 5113bc71726cSzhangyi (F) /* 5114bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5115bc71726cSzhangyi (F) * used to detect the metadata async write error. 5116bc71726cSzhangyi (F) */ 5117bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5118bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5119bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5120bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5121617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5122617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5123617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 51240390131bSFrank Mayhar if (needs_recovery) { 5125b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 512611215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 512711215630SJan Kara if (err) 512802f310fcSJan Kara goto failed_mount9; 51290390131bSFrank Mayhar } 51300390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 51310390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 51320390131bSFrank Mayhar descr = " journalled data mode"; 51330390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 51340390131bSFrank Mayhar descr = " ordered data mode"; 51350390131bSFrank Mayhar else 51360390131bSFrank Mayhar descr = " writeback data mode"; 51370390131bSFrank Mayhar } else 51380390131bSFrank Mayhar descr = "out journal"; 51390390131bSFrank Mayhar 514079add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 514179add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 514279add3a3SLukas Czerner if (!blk_queue_discard(q)) 514379add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 514479add3a3SLukas Czerner "mounting with \"discard\" option, but " 514579add3a3SLukas Czerner "the device does not support discard"); 514679add3a3SLukas Czerner } 514779add3a3SLukas Czerner 5148e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 5149d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5150ca9b404fSRoman Anufriev "Opts: %.*s%s%s. Quota mode: %s.", descr, 51515aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 51525aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 5153ca9b404fSRoman Anufriev *sbi->s_es->s_mount_opts ? "; " : "", orig_data, 5154ca9b404fSRoman Anufriev ext4_quota_mode(sb)); 5155ac27a0ecSDave Kleikamp 515666e61a9eSTheodore Ts'o if (es->s_error_count) 515766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5158ac27a0ecSDave Kleikamp 5159efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5160efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5161efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5162efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 51631cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 51641cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5165efbed4dcSTheodore Ts'o 5166d4c402d9SCurt Wohlgemuth kfree(orig_data); 5167ac27a0ecSDave Kleikamp return 0; 5168ac27a0ecSDave Kleikamp 5169617ba13bSMingming Cao cantfind_ext4: 5170ac27a0ecSDave Kleikamp if (!silent) 5171b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5172ac27a0ecSDave Kleikamp goto failed_mount; 5173ac27a0ecSDave Kleikamp 517402f310fcSJan Kara failed_mount9: 517502f310fcSJan Kara ext4_release_orphan_info(sb); 517672ba7450STheodore Ts'o failed_mount8: 5177ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5178cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5179dcf2d804STao Ma failed_mount7: 5180dcf2d804STao Ma ext4_unregister_li_request(sb); 5181dcf2d804STao Ma failed_mount6: 5182f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 51837c990728SSuraj Jitindar Singh rcu_read_lock(); 51847c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 51857c990728SSuraj Jitindar Singh if (flex_groups) { 51867c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 51877c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 51887c990728SSuraj Jitindar Singh kvfree(flex_groups); 51897c990728SSuraj Jitindar Singh } 51907c990728SSuraj Jitindar Singh rcu_read_unlock(); 5191d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5192d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5193d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5194d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5195efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5196bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 519700764937SAzat Khuzhin failed_mount5: 5198f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5199f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5200f9ae9cf5STheodore Ts'o failed_mount4a: 520194bf608aSAl Viro dput(sb->s_root); 520232a9bb57SManish Katiyar sb->s_root = NULL; 520394bf608aSAl Viro failed_mount4: 5204b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 52052e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 52062e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 52074c0425ffSMingming Cao failed_mount_wq: 5208dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5209dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 521050c15df6SChengguang Xu 521147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 521247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 521350c15df6SChengguang Xu 52140390131bSFrank Mayhar if (sbi->s_journal) { 5215bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5216bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5217dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 521847b4a50bSJan Kara sbi->s_journal = NULL; 52190390131bSFrank Mayhar } 522050460fe8SDarrick J. Wong failed_mount3a: 5221d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5222eb68d0e2SZheng Liu failed_mount3: 5223bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5224c92dc856SJan Kara flush_work(&sbi->s_error_work); 52252a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5226618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5227ac27a0ecSDave Kleikamp failed_mount2: 52281d0c3924STheodore Ts'o rcu_read_lock(); 52291d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5230ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 52311d0c3924STheodore Ts'o brelse(group_desc[i]); 52321d0c3924STheodore Ts'o kvfree(group_desc); 52331d0c3924STheodore Ts'o rcu_read_unlock(); 5234ac27a0ecSDave Kleikamp failed_mount: 52350441984aSDarrick J. Wong if (sbi->s_chksum_driver) 52360441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5237c83ad55eSGabriel Krisman Bertazi 5238c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5239f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5240c83ad55eSGabriel Krisman Bertazi #endif 5241c83ad55eSGabriel Krisman Bertazi 5242ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5243a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 52440ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5245ac27a0ecSDave Kleikamp #endif 5246ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5247afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5248ac27a0ecSDave Kleikamp brelse(bh); 5249afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5250ac27a0ecSDave Kleikamp out_fail: 5251ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5252f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 52535aee0f8aSTheodore Ts'o out_free_base: 5254ac27a0ecSDave Kleikamp kfree(sbi); 5255d4c402d9SCurt Wohlgemuth kfree(orig_data); 52565e405595SDan Williams fs_put_dax(dax_dev); 525707aa2ea1SLukas Czerner return err ? err : ret; 5258ac27a0ecSDave Kleikamp } 5259ac27a0ecSDave Kleikamp 5260ac27a0ecSDave Kleikamp /* 5261ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5262ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5263ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5264ac27a0ecSDave Kleikamp */ 5265617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5266ac27a0ecSDave Kleikamp { 5267617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5268ac27a0ecSDave Kleikamp 5269ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 527030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 527130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 52726866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5273ac27a0ecSDave Kleikamp 5274a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5275ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5276dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5277ac27a0ecSDave Kleikamp else 5278dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 52795bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 52805bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 52815bf5683aSHidehiro Kawai else 52825bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5283a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5284ac27a0ecSDave Kleikamp } 5285ac27a0ecSDave Kleikamp 5286c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5287ac27a0ecSDave Kleikamp unsigned int journal_inum) 5288ac27a0ecSDave Kleikamp { 5289ac27a0ecSDave Kleikamp struct inode *journal_inode; 5290ac27a0ecSDave Kleikamp 5291c6cb7e77SEric Whitney /* 5292c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5293c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5294c6cb7e77SEric Whitney * will try to delete it. 5295c6cb7e77SEric Whitney */ 52968a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 52971d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5298b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5299ac27a0ecSDave Kleikamp return NULL; 5300ac27a0ecSDave Kleikamp } 5301ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5302ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5303ac27a0ecSDave Kleikamp iput(journal_inode); 5304b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5305ac27a0ecSDave Kleikamp return NULL; 5306ac27a0ecSDave Kleikamp } 5307ac27a0ecSDave Kleikamp 5308e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5309ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 53101d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5311b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5312ac27a0ecSDave Kleikamp iput(journal_inode); 5313ac27a0ecSDave Kleikamp return NULL; 5314ac27a0ecSDave Kleikamp } 5315c6cb7e77SEric Whitney return journal_inode; 5316c6cb7e77SEric Whitney } 5317c6cb7e77SEric Whitney 5318c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5319c6cb7e77SEric Whitney unsigned int journal_inum) 5320c6cb7e77SEric Whitney { 5321c6cb7e77SEric Whitney struct inode *journal_inode; 5322c6cb7e77SEric Whitney journal_t *journal; 5323c6cb7e77SEric Whitney 532411215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 532511215630SJan Kara return NULL; 5326c6cb7e77SEric Whitney 5327c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5328c6cb7e77SEric Whitney if (!journal_inode) 5329c6cb7e77SEric Whitney return NULL; 5330ac27a0ecSDave Kleikamp 5331dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5332ac27a0ecSDave Kleikamp if (!journal) { 5333b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5334ac27a0ecSDave Kleikamp iput(journal_inode); 5335ac27a0ecSDave Kleikamp return NULL; 5336ac27a0ecSDave Kleikamp } 5337ac27a0ecSDave Kleikamp journal->j_private = sb; 5338617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5339ac27a0ecSDave Kleikamp return journal; 5340ac27a0ecSDave Kleikamp } 5341ac27a0ecSDave Kleikamp 5342617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5343ac27a0ecSDave Kleikamp dev_t j_dev) 5344ac27a0ecSDave Kleikamp { 5345ac27a0ecSDave Kleikamp struct buffer_head *bh; 5346ac27a0ecSDave Kleikamp journal_t *journal; 5347617ba13bSMingming Cao ext4_fsblk_t start; 5348617ba13bSMingming Cao ext4_fsblk_t len; 5349ac27a0ecSDave Kleikamp int hblock, blocksize; 5350617ba13bSMingming Cao ext4_fsblk_t sb_block; 5351ac27a0ecSDave Kleikamp unsigned long offset; 5352617ba13bSMingming Cao struct ext4_super_block *es; 5353ac27a0ecSDave Kleikamp struct block_device *bdev; 5354ac27a0ecSDave Kleikamp 535511215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 535611215630SJan Kara return NULL; 53570390131bSFrank Mayhar 5358b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5359ac27a0ecSDave Kleikamp if (bdev == NULL) 5360ac27a0ecSDave Kleikamp return NULL; 5361ac27a0ecSDave Kleikamp 5362ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5363e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5364ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5365b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5366b31e1552SEric Sandeen "blocksize too small for journal device"); 5367ac27a0ecSDave Kleikamp goto out_bdev; 5368ac27a0ecSDave Kleikamp } 5369ac27a0ecSDave Kleikamp 5370617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5371617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5372ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5373ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5374b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5375b31e1552SEric Sandeen "external journal"); 5376ac27a0ecSDave Kleikamp goto out_bdev; 5377ac27a0ecSDave Kleikamp } 5378ac27a0ecSDave Kleikamp 53792716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5380617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5381ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5382617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5383b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5384b31e1552SEric Sandeen "bad superblock"); 5385ac27a0ecSDave Kleikamp brelse(bh); 5386ac27a0ecSDave Kleikamp goto out_bdev; 5387ac27a0ecSDave Kleikamp } 5388ac27a0ecSDave Kleikamp 5389df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5390df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5391df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5392df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5393df4763beSDarrick J. Wong "corrupt superblock"); 5394df4763beSDarrick J. Wong brelse(bh); 5395df4763beSDarrick J. Wong goto out_bdev; 5396df4763beSDarrick J. Wong } 5397df4763beSDarrick J. Wong 5398617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5399b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5400ac27a0ecSDave Kleikamp brelse(bh); 5401ac27a0ecSDave Kleikamp goto out_bdev; 5402ac27a0ecSDave Kleikamp } 5403ac27a0ecSDave Kleikamp 5404bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5405ac27a0ecSDave Kleikamp start = sb_block + 1; 5406ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5407ac27a0ecSDave Kleikamp 5408dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5409ac27a0ecSDave Kleikamp start, len, blocksize); 5410ac27a0ecSDave Kleikamp if (!journal) { 5411b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5412ac27a0ecSDave Kleikamp goto out_bdev; 5413ac27a0ecSDave Kleikamp } 5414ac27a0ecSDave Kleikamp journal->j_private = sb; 54152d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5416b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5417ac27a0ecSDave Kleikamp goto out_journal; 5418ac27a0ecSDave Kleikamp } 5419ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5420b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5421b31e1552SEric Sandeen "user (unsupported) - %d", 5422ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5423ac27a0ecSDave Kleikamp goto out_journal; 5424ac27a0ecSDave Kleikamp } 5425ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5426617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5427ac27a0ecSDave Kleikamp return journal; 54280b8e58a1SAndreas Dilger 5429ac27a0ecSDave Kleikamp out_journal: 5430dab291afSMingming Cao jbd2_journal_destroy(journal); 5431ac27a0ecSDave Kleikamp out_bdev: 5432617ba13bSMingming Cao ext4_blkdev_put(bdev); 5433ac27a0ecSDave Kleikamp return NULL; 5434ac27a0ecSDave Kleikamp } 5435ac27a0ecSDave Kleikamp 5436617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5437617ba13bSMingming Cao struct ext4_super_block *es, 5438ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5439ac27a0ecSDave Kleikamp { 5440ac27a0ecSDave Kleikamp journal_t *journal; 5441ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5442ac27a0ecSDave Kleikamp dev_t journal_dev; 5443ac27a0ecSDave Kleikamp int err = 0; 5444ac27a0ecSDave Kleikamp int really_read_only; 5445273108faSLukas Czerner int journal_dev_ro; 5446ac27a0ecSDave Kleikamp 544711215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 544811215630SJan Kara return -EFSCORRUPTED; 54490390131bSFrank Mayhar 5450ac27a0ecSDave Kleikamp if (journal_devnum && 5451ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5452b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5453b31e1552SEric Sandeen "numbers have changed"); 5454ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5455ac27a0ecSDave Kleikamp } else 5456ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5457ac27a0ecSDave Kleikamp 5458273108faSLukas Czerner if (journal_inum && journal_dev) { 5459273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5460273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5461273108faSLukas Czerner return -EINVAL; 5462273108faSLukas Czerner } 5463273108faSLukas Czerner 5464273108faSLukas Czerner if (journal_inum) { 5465273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5466273108faSLukas Czerner if (!journal) 5467273108faSLukas Czerner return -EINVAL; 5468273108faSLukas Czerner } else { 5469273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5470273108faSLukas Czerner if (!journal) 5471273108faSLukas Czerner return -EINVAL; 5472273108faSLukas Czerner } 5473273108faSLukas Czerner 5474273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5475273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5476273108faSLukas Czerner 5477273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5478273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5479273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5480273108faSLukas Czerner err = -EROFS; 5481273108faSLukas Czerner goto err_out; 5482273108faSLukas Czerner } 5483ac27a0ecSDave Kleikamp 5484ac27a0ecSDave Kleikamp /* 5485ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5486ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5487ac27a0ecSDave Kleikamp * can get read-write access to the device. 5488ac27a0ecSDave Kleikamp */ 5489e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5490bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5491b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5492b31e1552SEric Sandeen "required on readonly filesystem"); 5493ac27a0ecSDave Kleikamp if (really_read_only) { 5494b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5495d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5496d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5497273108faSLukas Czerner err = -EROFS; 5498273108faSLukas Czerner goto err_out; 5499ac27a0ecSDave Kleikamp } 5500b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5501b31e1552SEric Sandeen "be enabled during recovery"); 5502ac27a0ecSDave Kleikamp } 5503ac27a0ecSDave Kleikamp } 5504ac27a0ecSDave Kleikamp 550590576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5506b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 55074776004fSTheodore Ts'o 5508e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5509dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 55101c13d5c0STheodore Ts'o if (!err) { 55111c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 55121c13d5c0STheodore Ts'o if (save) 55131c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 55141c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5515dab291afSMingming Cao err = jbd2_journal_load(journal); 55161c13d5c0STheodore Ts'o if (save) 55171c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 55181c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 55191c13d5c0STheodore Ts'o kfree(save); 55201c13d5c0STheodore Ts'o } 5521ac27a0ecSDave Kleikamp 5522ac27a0ecSDave Kleikamp if (err) { 5523b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5524273108faSLukas Czerner goto err_out; 5525ac27a0ecSDave Kleikamp } 5526ac27a0ecSDave Kleikamp 5527617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 552811215630SJan Kara err = ext4_clear_journal_err(sb, es); 552911215630SJan Kara if (err) { 553011215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 553111215630SJan Kara jbd2_journal_destroy(journal); 553211215630SJan Kara return err; 553311215630SJan Kara } 5534ac27a0ecSDave Kleikamp 5535c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5536ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5537ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5538ac27a0ecSDave Kleikamp 5539ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 55404392fbc4SJan Kara ext4_commit_super(sb); 5541ac27a0ecSDave Kleikamp } 5542ac27a0ecSDave Kleikamp 5543ac27a0ecSDave Kleikamp return 0; 5544273108faSLukas Czerner 5545273108faSLukas Czerner err_out: 5546273108faSLukas Czerner jbd2_journal_destroy(journal); 5547273108faSLukas Czerner return err; 5548ac27a0ecSDave Kleikamp } 5549ac27a0ecSDave Kleikamp 55502d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 55512d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5552ac27a0ecSDave Kleikamp { 5553c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5554e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5555e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5556ac27a0ecSDave Kleikamp 555705c2c00fSJan Kara lock_buffer(sbh); 5558a17712c8SJon Derrick /* 555971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 556071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 556171290b36STheodore Ts'o * write time when we are mounting the root file system 556271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 556371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 556471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 556571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 556671290b36STheodore Ts'o * to complain and force a full file system check. 556771290b36STheodore Ts'o */ 55681751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 55696a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5570afc32f7eSTheodore Ts'o es->s_kbytes_written = 5571e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 55728446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5573e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5574e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 557557042651STheodore Ts'o ext4_free_blocks_count_set(es, 5576e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5577e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5578e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 55797f93cff9STheodore Ts'o es->s_free_inodes_count = 55807f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5581e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5582c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5583c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5584c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5585c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5586c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5587c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5588c92dc856SJan Kara &es->s_first_error_time_hi, 5589c92dc856SJan Kara sbi->s_first_error_time); 5590c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5591c92dc856SJan Kara sizeof(es->s_first_error_func)); 5592c92dc856SJan Kara es->s_first_error_line = 5593c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5594c92dc856SJan Kara es->s_first_error_ino = 5595c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5596c92dc856SJan Kara es->s_first_error_block = 5597c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5598c92dc856SJan Kara es->s_first_error_errcode = 5599c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5600c92dc856SJan Kara } 5601c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5602c92dc856SJan Kara &es->s_last_error_time_hi, 5603c92dc856SJan Kara sbi->s_last_error_time); 5604c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5605c92dc856SJan Kara sizeof(es->s_last_error_func)); 5606c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5607c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5608c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5609c92dc856SJan Kara es->s_last_error_errcode = 5610c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5611c92dc856SJan Kara /* 5612c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5613c92dc856SJan Kara * started already 5614c92dc856SJan Kara */ 5615c92dc856SJan Kara if (!es->s_error_count) 5616c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5617c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5618c92dc856SJan Kara sbi->s_add_error_count = 0; 5619c92dc856SJan Kara } 5620c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5621c92dc856SJan Kara 562206db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 56232d01ddc8SJan Kara unlock_buffer(sbh); 56242d01ddc8SJan Kara } 56252d01ddc8SJan Kara 56262d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 56272d01ddc8SJan Kara { 56282d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 56292d01ddc8SJan Kara int error = 0; 56302d01ddc8SJan Kara 5631f88f1466SFengnan Chang if (!sbh) 5632f88f1466SFengnan Chang return -EINVAL; 5633f88f1466SFengnan Chang if (block_device_ejected(sb)) 5634f88f1466SFengnan Chang return -ENODEV; 56352d01ddc8SJan Kara 56362d01ddc8SJan Kara ext4_update_super(sb); 56372d01ddc8SJan Kara 5638e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 56394743f839SPranay Kr. Srivastava /* 56404743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 56414743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 56424743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 56434743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 56444743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 56454743f839SPranay Kr. Srivastava * write and hope for the best. 56464743f839SPranay Kr. Srivastava */ 56474743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 56484743f839SPranay Kr. Srivastava "superblock detected"); 56494743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 56504743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 56514743f839SPranay Kr. Srivastava } 56522d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 5653ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5654564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 565500473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5656c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5657b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5658b31e1552SEric Sandeen "superblock"); 5659914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5660914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5661914258bfSTheodore Ts'o } 5662c4be0c1dSTakashi Sato return error; 5663ac27a0ecSDave Kleikamp } 5664ac27a0ecSDave Kleikamp 5665ac27a0ecSDave Kleikamp /* 5666ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5667ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5668ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5669ac27a0ecSDave Kleikamp */ 567011215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5671617ba13bSMingming Cao struct ext4_super_block *es) 5672ac27a0ecSDave Kleikamp { 567311215630SJan Kara int err; 5674617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5675ac27a0ecSDave Kleikamp 5676e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 567711215630SJan Kara if (journal != NULL) { 567811215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 567911215630SJan Kara "mounted!"); 568011215630SJan Kara return -EFSCORRUPTED; 568111215630SJan Kara } 568211215630SJan Kara return 0; 56830390131bSFrank Mayhar } 5684dab291afSMingming Cao jbd2_journal_lock_updates(journal); 568501d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 568611215630SJan Kara if (err < 0) 56877ffe1ea8SHidehiro Kawai goto out; 56887ffe1ea8SHidehiro Kawai 568902f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 569002f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 569102f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 569202f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 569302f310fcSJan Kara err = -EFSCORRUPTED; 569402f310fcSJan Kara goto out; 569502f310fcSJan Kara } 5696e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 569702f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 56984392fbc4SJan Kara ext4_commit_super(sb); 5699ac27a0ecSDave Kleikamp } 57007ffe1ea8SHidehiro Kawai out: 5701dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 570211215630SJan Kara return err; 5703ac27a0ecSDave Kleikamp } 5704ac27a0ecSDave Kleikamp 5705ac27a0ecSDave Kleikamp /* 5706ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5707ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 5708ac27a0ecSDave Kleikamp * main filesystem now. 5709ac27a0ecSDave Kleikamp */ 571011215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 5711617ba13bSMingming Cao struct ext4_super_block *es) 5712ac27a0ecSDave Kleikamp { 5713ac27a0ecSDave Kleikamp journal_t *journal; 5714ac27a0ecSDave Kleikamp int j_errno; 5715ac27a0ecSDave Kleikamp const char *errstr; 5716ac27a0ecSDave Kleikamp 571711215630SJan Kara if (!ext4_has_feature_journal(sb)) { 571811215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 571911215630SJan Kara return -EFSCORRUPTED; 572011215630SJan Kara } 57210390131bSFrank Mayhar 5722617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5723ac27a0ecSDave Kleikamp 5724ac27a0ecSDave Kleikamp /* 5725ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 5726617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 5727ac27a0ecSDave Kleikamp */ 5728ac27a0ecSDave Kleikamp 5729dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 5730ac27a0ecSDave Kleikamp if (j_errno) { 5731ac27a0ecSDave Kleikamp char nbuf[16]; 5732ac27a0ecSDave Kleikamp 5733617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 573412062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 5735ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 573612062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 5737ac27a0ecSDave Kleikamp 5738617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5739617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 57404392fbc4SJan Kara ext4_commit_super(sb); 5741ac27a0ecSDave Kleikamp 5742dab291afSMingming Cao jbd2_journal_clear_err(journal); 5743d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 5744ac27a0ecSDave Kleikamp } 574511215630SJan Kara return 0; 5746ac27a0ecSDave Kleikamp } 5747ac27a0ecSDave Kleikamp 5748ac27a0ecSDave Kleikamp /* 5749ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 5750ac27a0ecSDave Kleikamp * and wait on the commit. 5751ac27a0ecSDave Kleikamp */ 5752617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 5753ac27a0ecSDave Kleikamp { 5754ac27a0ecSDave Kleikamp journal_t *journal; 5755ac27a0ecSDave Kleikamp 5756bc98a42cSDavid Howells if (sb_rdonly(sb)) 5757ac27a0ecSDave Kleikamp return 0; 5758ac27a0ecSDave Kleikamp 5759617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5760b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 5761ac27a0ecSDave Kleikamp } 5762ac27a0ecSDave Kleikamp 5763617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 5764ac27a0ecSDave Kleikamp { 576514ce0cb4STheodore Ts'o int ret = 0; 57669eddacf9SJan Kara tid_t target; 576706a407f1SDmitry Monakhov bool needs_barrier = false; 57688d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5769ac27a0ecSDave Kleikamp 577049598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 57710db1ff22STheodore Ts'o return 0; 57720db1ff22STheodore Ts'o 57739bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 57742e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 5775a1177825SJan Kara /* 5776a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 5777a1177825SJan Kara * no dirty dquots 5778a1177825SJan Kara */ 5779a1177825SJan Kara dquot_writeback_dquots(sb, -1); 578006a407f1SDmitry Monakhov /* 578106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 578206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 578306a407f1SDmitry Monakhov * transaction_commit will do it for us. 578406a407f1SDmitry Monakhov */ 5785bda32530STheodore Ts'o if (sbi->s_journal) { 578606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 578706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 578806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 578906a407f1SDmitry Monakhov needs_barrier = true; 579006a407f1SDmitry Monakhov 57918d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 5792ac27a0ecSDave Kleikamp if (wait) 5793bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 5794bda32530STheodore Ts'o target); 57950390131bSFrank Mayhar } 5796bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5797bda32530STheodore Ts'o needs_barrier = true; 579806a407f1SDmitry Monakhov if (needs_barrier) { 579906a407f1SDmitry Monakhov int err; 5800c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 580106a407f1SDmitry Monakhov if (!ret) 580206a407f1SDmitry Monakhov ret = err; 580306a407f1SDmitry Monakhov } 580406a407f1SDmitry Monakhov 580506a407f1SDmitry Monakhov return ret; 580606a407f1SDmitry Monakhov } 580706a407f1SDmitry Monakhov 5808ac27a0ecSDave Kleikamp /* 5809ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5810ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5811be4f27d3SYongqiang Yang * 5812be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 58138e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 58148e8ad8a5SJan Kara * modifications. 5815ac27a0ecSDave Kleikamp */ 5816c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5817ac27a0ecSDave Kleikamp { 5818c4be0c1dSTakashi Sato int error = 0; 5819c4be0c1dSTakashi Sato journal_t *journal; 5820ac27a0ecSDave Kleikamp 5821bc98a42cSDavid Howells if (sb_rdonly(sb)) 58229ca92389STheodore Ts'o return 0; 58239ca92389STheodore Ts'o 5824c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5825ac27a0ecSDave Kleikamp 5826bb044576STheodore Ts'o if (journal) { 5827ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5828dab291afSMingming Cao jbd2_journal_lock_updates(journal); 58297ffe1ea8SHidehiro Kawai 58307ffe1ea8SHidehiro Kawai /* 5831bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5832bb044576STheodore Ts'o * flush the journal. 58337ffe1ea8SHidehiro Kawai */ 583401d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 58356b0310fbSEric Sandeen if (error < 0) 58366b0310fbSEric Sandeen goto out; 5837ac27a0ecSDave Kleikamp 5838ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5839e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 584002f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 584102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 5842c642dc9eSEric Sandeen } 5843c642dc9eSEric Sandeen 58444392fbc4SJan Kara error = ext4_commit_super(sb); 58456b0310fbSEric Sandeen out: 5846bb044576STheodore Ts'o if (journal) 58478e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5848bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 58496b0310fbSEric Sandeen return error; 5850ac27a0ecSDave Kleikamp } 5851ac27a0ecSDave Kleikamp 5852ac27a0ecSDave Kleikamp /* 5853ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5854ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5855ac27a0ecSDave Kleikamp */ 5856c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5857ac27a0ecSDave Kleikamp { 5858bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 58599ca92389STheodore Ts'o return 0; 58609ca92389STheodore Ts'o 5861c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 58629ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5863e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 586402f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 586502f310fcSJan Kara ext4_set_feature_orphan_present(sb); 5866c642dc9eSEric Sandeen } 5867c642dc9eSEric Sandeen 58684392fbc4SJan Kara ext4_commit_super(sb); 5869c4be0c1dSTakashi Sato return 0; 5870ac27a0ecSDave Kleikamp } 5871ac27a0ecSDave Kleikamp 5872673c6100STheodore Ts'o /* 5873673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5874673c6100STheodore Ts'o */ 5875673c6100STheodore Ts'o struct ext4_mount_options { 5876673c6100STheodore Ts'o unsigned long s_mount_opt; 5877a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 587808cefc7aSEric W. Biederman kuid_t s_resuid; 587908cefc7aSEric W. Biederman kgid_t s_resgid; 5880673c6100STheodore Ts'o unsigned long s_commit_interval; 5881673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5882673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5883673c6100STheodore Ts'o int s_jquota_fmt; 5884a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5885673c6100STheodore Ts'o #endif 5886673c6100STheodore Ts'o }; 5887673c6100STheodore Ts'o 5888617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5889ac27a0ecSDave Kleikamp { 5890617ba13bSMingming Cao struct ext4_super_block *es; 5891617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5892f25391ebSLukas Czerner unsigned long old_sb_flags, vfs_flags; 5893617ba13bSMingming Cao struct ext4_mount_options old_opts; 58948a266467STheodore Ts'o ext4_group_t g; 5895c5e06d10SJohann Lombardi int err = 0; 5896ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 58973bbef91bSAustin Kim int enable_quota = 0; 589803dafb5fSChen Gang int i, j; 589933458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 5900ac27a0ecSDave Kleikamp #endif 5901d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5902b237e304SHarshad Shirwadkar struct ext4_parsed_options parsed_opts; 5903b237e304SHarshad Shirwadkar 5904b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5905b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 5906ac27a0ecSDave Kleikamp 590721ac738eSChengguang Xu if (data && !orig_data) 590821ac738eSChengguang Xu return -ENOMEM; 590921ac738eSChengguang Xu 5910ac27a0ecSDave Kleikamp /* Store the original options */ 5911ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5912ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5913a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5914ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5915ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5916ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 591730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 591830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5919ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5920ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5921a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 592203dafb5fSChen Gang if (sbi->s_qf_names[i]) { 592333458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 592433458eabSTheodore Ts'o 592533458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 592603dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 592703dafb5fSChen Gang for (j = 0; j < i; j++) 592803dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 59293e36a163SWei Yongjun kfree(orig_data); 593003dafb5fSChen Gang return -ENOMEM; 593103dafb5fSChen Gang } 593203dafb5fSChen Gang } else 593303dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5934ac27a0ecSDave Kleikamp #endif 5935b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5936b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = 5937b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 5938ac27a0ecSDave Kleikamp 5939f25391ebSLukas Czerner /* 5940f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 5941f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 5942f25391ebSLukas Czerner * s_flags. Copy those selected flags from *flags to s_flags 5943f25391ebSLukas Czerner */ 5944f25391ebSLukas Czerner vfs_flags = SB_LAZYTIME | SB_I_VERSION; 5945f25391ebSLukas Czerner sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags); 5946f25391ebSLukas Czerner 5947b237e304SHarshad Shirwadkar if (!parse_options(data, sb, &parsed_opts, 1)) { 5948ac27a0ecSDave Kleikamp err = -EINVAL; 5949ac27a0ecSDave Kleikamp goto restore_opts; 5950ac27a0ecSDave Kleikamp } 5951ac27a0ecSDave Kleikamp 59526b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 59536b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 59546b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 59552d5b86e0SEric Sandeen "during remount not supported; ignoring"); 59562d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5957c6d3d56dSDarrick J. Wong } 5958c6d3d56dSDarrick J. Wong 59596ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 59606ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 59616ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 59626ae6514bSPiotr Sarna "both data=journal and delalloc"); 59636ae6514bSPiotr Sarna err = -EINVAL; 59646ae6514bSPiotr Sarna goto restore_opts; 59656ae6514bSPiotr Sarna } 59666ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 59676ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 59686ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 59696ae6514bSPiotr Sarna err = -EINVAL; 59706ae6514bSPiotr Sarna goto restore_opts; 59716ae6514bSPiotr Sarna } 5972ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5973ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5974ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5975ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5976ab04df78SJan Kara err = -EINVAL; 5977ab04df78SJan Kara goto restore_opts; 5978ab04df78SJan Kara } 5979923ae0ffSRoss Zwisler } 5980923ae0ffSRoss Zwisler 5981cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5982cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5983cdb7ee4cSTahsin Erdogan err = -EINVAL; 5984cdb7ee4cSTahsin Erdogan goto restore_opts; 5985cdb7ee4cSTahsin Erdogan } 5986cdb7ee4cSTahsin Erdogan 59879b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 5988124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 5989ac27a0ecSDave Kleikamp 59901751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 59911751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5992ac27a0ecSDave Kleikamp 5993ac27a0ecSDave Kleikamp es = sbi->s_es; 5994ac27a0ecSDave Kleikamp 5995b3881f74STheodore Ts'o if (sbi->s_journal) { 5996617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5997b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 5998b3881f74STheodore Ts'o } 5999ac27a0ecSDave Kleikamp 6000c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6001c92dc856SJan Kara flush_work(&sbi->s_error_work); 6002c92dc856SJan Kara 60031751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 60049b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6005ac27a0ecSDave Kleikamp err = -EROFS; 6006ac27a0ecSDave Kleikamp goto restore_opts; 6007ac27a0ecSDave Kleikamp } 6008ac27a0ecSDave Kleikamp 60091751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 601038c03b34STheodore Ts'o err = sync_filesystem(sb); 601138c03b34STheodore Ts'o if (err < 0) 601238c03b34STheodore Ts'o goto restore_opts; 60130f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 60140f0dd62fSChristoph Hellwig if (err < 0) 6015c79d967dSChristoph Hellwig goto restore_opts; 6016c79d967dSChristoph Hellwig 6017ac27a0ecSDave Kleikamp /* 6018ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6019ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6020ac27a0ecSDave Kleikamp */ 60211751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6022ac27a0ecSDave Kleikamp 6023ac27a0ecSDave Kleikamp /* 6024ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6025ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6026ac27a0ecSDave Kleikamp * mark the partition as valid again. 6027ac27a0ecSDave Kleikamp */ 6028617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6029617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6030ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6031ac27a0ecSDave Kleikamp 603211215630SJan Kara if (sbi->s_journal) { 603311215630SJan Kara /* 603411215630SJan Kara * We let remount-ro finish even if marking fs 603511215630SJan Kara * as clean failed... 603611215630SJan Kara */ 6037617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 603811215630SJan Kara } 6039ac27a0ecSDave Kleikamp } else { 6040a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6041e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 60422cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6043ac27a0ecSDave Kleikamp err = -EROFS; 6044ac27a0ecSDave Kleikamp goto restore_opts; 6045ac27a0ecSDave Kleikamp } 6046ead6596bSEric Sandeen /* 60478a266467STheodore Ts'o * Make sure the group descriptor checksums 60480b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 60498a266467STheodore Ts'o */ 60508a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 60518a266467STheodore Ts'o struct ext4_group_desc *gdp = 60528a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 60538a266467STheodore Ts'o 6054feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6055b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6056b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6057e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 60588a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 60596a797d27SDarrick J. Wong err = -EFSBADCRC; 60608a266467STheodore Ts'o goto restore_opts; 60618a266467STheodore Ts'o } 60628a266467STheodore Ts'o } 60638a266467STheodore Ts'o 60648a266467STheodore Ts'o /* 6065ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6066ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6067ead6596bSEric Sandeen * require a full umount/remount for now. 6068ead6596bSEric Sandeen */ 606902f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6070b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6071ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6072ead6596bSEric Sandeen "orphan inode list. Please " 6073b31e1552SEric Sandeen "umount/remount instead"); 6074ead6596bSEric Sandeen err = -EINVAL; 6075ead6596bSEric Sandeen goto restore_opts; 6076ead6596bSEric Sandeen } 6077ead6596bSEric Sandeen 6078ac27a0ecSDave Kleikamp /* 6079ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6080ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6081ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6082ac27a0ecSDave Kleikamp * the partition.) 6083ac27a0ecSDave Kleikamp */ 608411215630SJan Kara if (sbi->s_journal) { 608511215630SJan Kara err = ext4_clear_journal_err(sb, es); 608611215630SJan Kara if (err) 608711215630SJan Kara goto restore_opts; 608811215630SJan Kara } 6089ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6090c89128a0SJaegeuk Kim 6091c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6092c89128a0SJaegeuk Kim if (err) 6093c89128a0SJaegeuk Kim goto restore_opts; 6094c89128a0SJaegeuk Kim 60951751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6096e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6097c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6098c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6099c5e06d10SJohann Lombardi err = -EROFS; 6100c5e06d10SJohann Lombardi goto restore_opts; 6101c5e06d10SJohann Lombardi } 61023bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6103c79d967dSChristoph Hellwig enable_quota = 1; 61043bbef91bSAustin Kim #endif 6105ac27a0ecSDave Kleikamp } 6106ac27a0ecSDave Kleikamp } 6107bfff6873SLukas Czerner 6108bfff6873SLukas Czerner /* 6109bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6110bfff6873SLukas Czerner * current settings 6111bfff6873SLukas Czerner */ 6112bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6113bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6114bfff6873SLukas Czerner else { 6115bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6116bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6117bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6118bfff6873SLukas Czerner } 6119bfff6873SLukas Czerner 61200f5bde1dSJan Kara /* 61210f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 61220f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 61230f5bde1dSJan Kara * succeed. 61240f5bde1dSJan Kara */ 6125dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6126d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6127d176b1f6SJan Kara if (err) 6128d176b1f6SJan Kara goto restore_opts; 61290f5bde1dSJan Kara } 6130d176b1f6SJan Kara 6131c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 61324392fbc4SJan Kara err = ext4_commit_super(sb); 6133c89128a0SJaegeuk Kim if (err) 6134c89128a0SJaegeuk Kim goto restore_opts; 6135c89128a0SJaegeuk Kim } 61360390131bSFrank Mayhar 6137ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6138ac27a0ecSDave Kleikamp /* Release old quota file names */ 6139a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6140ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 61417c319d32SAditya Kali if (enable_quota) { 61427c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 61430f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6144e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 61457c319d32SAditya Kali err = ext4_enable_quotas(sb); 614607724f98STheodore Ts'o if (err) 61477c319d32SAditya Kali goto restore_opts; 61487c319d32SAditya Kali } 61497c319d32SAditya Kali } 61507c319d32SAditya Kali #endif 6151dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 61520f5bde1dSJan Kara ext4_release_system_zone(sb); 6153d4c402d9SCurt Wohlgemuth 615461bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 615561bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 615661bb4a1cSTheodore Ts'o 6157f25391ebSLukas Czerner /* 6158f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6159f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6160f25391ebSLukas Czerner * s_flags. Copy those selected flags from s_flags to *flags 6161f25391ebSLukas Czerner */ 6162f25391ebSLukas Czerner *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags); 6163f25391ebSLukas Czerner 6164ca9b404fSRoman Anufriev ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.", 6165ca9b404fSRoman Anufriev orig_data, ext4_quota_mode(sb)); 6166d4c402d9SCurt Wohlgemuth kfree(orig_data); 6167ac27a0ecSDave Kleikamp return 0; 61680b8e58a1SAndreas Dilger 6169ac27a0ecSDave Kleikamp restore_opts: 6170ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6171ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6172a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6173ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6174ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6175ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 617630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 617730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6178dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 61790f5bde1dSJan Kara ext4_release_system_zone(sb); 6180ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6181ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6182a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 618333458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 618433458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6185ac27a0ecSDave Kleikamp } 618633458eabSTheodore Ts'o synchronize_rcu(); 618733458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 618833458eabSTheodore Ts'o kfree(to_free[i]); 6189ac27a0ecSDave Kleikamp #endif 619061bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 619161bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6192d4c402d9SCurt Wohlgemuth kfree(orig_data); 6193ac27a0ecSDave Kleikamp return err; 6194ac27a0ecSDave Kleikamp } 6195ac27a0ecSDave Kleikamp 6196689c958cSLi Xi #ifdef CONFIG_QUOTA 6197689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6198689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6199689c958cSLi Xi { 6200689c958cSLi Xi struct kqid qid; 6201689c958cSLi Xi struct dquot *dquot; 6202689c958cSLi Xi u64 limit; 6203689c958cSLi Xi u64 curblock; 6204689c958cSLi Xi 6205689c958cSLi Xi qid = make_kqid_projid(projid); 6206689c958cSLi Xi dquot = dqget(sb, qid); 6207689c958cSLi Xi if (IS_ERR(dquot)) 6208689c958cSLi Xi return PTR_ERR(dquot); 62097b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6210689c958cSLi Xi 6211a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6212a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 621357c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 621457c32ea4SChengguang Xu 6215689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6216f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6217f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6218689c958cSLi Xi buf->f_blocks = limit; 6219689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6220689c958cSLi Xi (buf->f_blocks > curblock) ? 6221689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6222689c958cSLi Xi } 6223689c958cSLi Xi 6224a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6225a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6226689c958cSLi Xi if (limit && buf->f_files > limit) { 6227689c958cSLi Xi buf->f_files = limit; 6228689c958cSLi Xi buf->f_ffree = 6229689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6230689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6231689c958cSLi Xi } 6232689c958cSLi Xi 62337b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6234689c958cSLi Xi dqput(dquot); 6235689c958cSLi Xi return 0; 6236689c958cSLi Xi } 6237689c958cSLi Xi #endif 6238689c958cSLi Xi 6239617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6240ac27a0ecSDave Kleikamp { 6241ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6242617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6243617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 624427dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6245d02a9391SKazuya Mio s64 bfree; 624627dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6247ac27a0ecSDave Kleikamp 6248952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6249952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6250ac27a0ecSDave Kleikamp 6251617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6252ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6253b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 625457042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 625557042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6256d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 625757042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 625827dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 625927dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 626027dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6261ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6262ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 626352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6264617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 62659591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 62660b8e58a1SAndreas Dilger 6267689c958cSLi Xi #ifdef CONFIG_QUOTA 6268689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6269689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6270689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6271689c958cSLi Xi #endif 6272ac27a0ecSDave Kleikamp return 0; 6273ac27a0ecSDave Kleikamp } 6274ac27a0ecSDave Kleikamp 6275ac27a0ecSDave Kleikamp 6276ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6277ac27a0ecSDave Kleikamp 6278bc8230eeSJan Kara /* 6279bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6280bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6281bc8230eeSJan Kara */ 6282ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6283ac27a0ecSDave Kleikamp { 62844c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6285ac27a0ecSDave Kleikamp } 6286ac27a0ecSDave Kleikamp 6287617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6288ac27a0ecSDave Kleikamp { 6289ac27a0ecSDave Kleikamp int ret, err; 6290ac27a0ecSDave Kleikamp handle_t *handle; 6291ac27a0ecSDave Kleikamp struct inode *inode; 6292ac27a0ecSDave Kleikamp 6293ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 62949924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6295617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6296ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6297ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6298ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6299617ba13bSMingming Cao err = ext4_journal_stop(handle); 6300ac27a0ecSDave Kleikamp if (!ret) 6301ac27a0ecSDave Kleikamp ret = err; 6302ac27a0ecSDave Kleikamp return ret; 6303ac27a0ecSDave Kleikamp } 6304ac27a0ecSDave Kleikamp 6305617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6306ac27a0ecSDave Kleikamp { 6307ac27a0ecSDave Kleikamp int ret, err; 6308ac27a0ecSDave Kleikamp handle_t *handle; 6309ac27a0ecSDave Kleikamp 63109924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6311617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6312ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6313ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6314ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6315617ba13bSMingming Cao err = ext4_journal_stop(handle); 6316ac27a0ecSDave Kleikamp if (!ret) 6317ac27a0ecSDave Kleikamp ret = err; 6318ac27a0ecSDave Kleikamp return ret; 6319ac27a0ecSDave Kleikamp } 6320ac27a0ecSDave Kleikamp 6321617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6322ac27a0ecSDave Kleikamp { 6323ac27a0ecSDave Kleikamp int ret, err; 6324ac27a0ecSDave Kleikamp handle_t *handle; 6325ac27a0ecSDave Kleikamp 63269924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6327617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 63289c3013e9SJan Kara if (IS_ERR(handle)) { 63299c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 63309c3013e9SJan Kara dquot_release(dquot); 6331ac27a0ecSDave Kleikamp return PTR_ERR(handle); 63329c3013e9SJan Kara } 6333ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6334617ba13bSMingming Cao err = ext4_journal_stop(handle); 6335ac27a0ecSDave Kleikamp if (!ret) 6336ac27a0ecSDave Kleikamp ret = err; 6337ac27a0ecSDave Kleikamp return ret; 6338ac27a0ecSDave Kleikamp } 6339ac27a0ecSDave Kleikamp 6340617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6341ac27a0ecSDave Kleikamp { 6342262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6343262b4662SJan Kara 6344f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6345ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6346617ba13bSMingming Cao return ext4_write_dquot(dquot); 6347ac27a0ecSDave Kleikamp } else { 6348ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6349ac27a0ecSDave Kleikamp } 6350ac27a0ecSDave Kleikamp } 6351ac27a0ecSDave Kleikamp 6352617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6353ac27a0ecSDave Kleikamp { 6354ac27a0ecSDave Kleikamp int ret, err; 6355ac27a0ecSDave Kleikamp handle_t *handle; 6356ac27a0ecSDave Kleikamp 6357ac27a0ecSDave Kleikamp /* Data block + inode block */ 63582b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6359ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6360ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6361ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6362617ba13bSMingming Cao err = ext4_journal_stop(handle); 6363ac27a0ecSDave Kleikamp if (!ret) 6364ac27a0ecSDave Kleikamp ret = err; 6365ac27a0ecSDave Kleikamp return ret; 6366ac27a0ecSDave Kleikamp } 6367ac27a0ecSDave Kleikamp 6368daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6369daf647d2STheodore Ts'o { 6370daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6371daf647d2STheodore Ts'o 6372daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6373daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6374daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6375daf647d2STheodore Ts'o * because the name of the lock is set using the 6376daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6377daf647d2STheodore Ts'o */ 6378daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6379daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6380daf647d2STheodore Ts'o } 6381daf647d2STheodore Ts'o 6382ac27a0ecSDave Kleikamp /* 6383ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6384ac27a0ecSDave Kleikamp */ 6385617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 63868c54ca9cSAl Viro const struct path *path) 6387ac27a0ecSDave Kleikamp { 6388ac27a0ecSDave Kleikamp int err; 6389ac27a0ecSDave Kleikamp 6390ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6391ac27a0ecSDave Kleikamp return -EINVAL; 63920623543bSJan Kara 6393ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6394d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6395ac27a0ecSDave Kleikamp return -EXDEV; 6396e0770e91SJan Kara 6397e0770e91SJan Kara /* Quota already enabled for this file? */ 6398e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6399e0770e91SJan Kara return -EBUSY; 6400e0770e91SJan Kara 64010623543bSJan Kara /* Journaling quota? */ 64020623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 64032b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6404f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6405b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6406b31e1552SEric Sandeen "Quota file not on filesystem root. " 6407b31e1552SEric Sandeen "Journaled quota will not work"); 640891389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 640991389240SJan Kara } else { 641091389240SJan Kara /* 641191389240SJan Kara * Clear the flag just in case mount options changed since 641291389240SJan Kara * last time. 641391389240SJan Kara */ 641491389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 64150623543bSJan Kara } 64160623543bSJan Kara 64170623543bSJan Kara /* 64180623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 64190623543bSJan Kara * all updates to the file when we bypass pagecache... 64200623543bSJan Kara */ 64210390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 64222b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 64230623543bSJan Kara /* 64240623543bSJan Kara * We don't need to lock updates but journal_flush() could 64250623543bSJan Kara * otherwise be livelocked... 64260623543bSJan Kara */ 64270623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 642801d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 64290623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6430f00c9e44SJan Kara if (err) 64317ffe1ea8SHidehiro Kawai return err; 64327ffe1ea8SHidehiro Kawai } 6433957153fcSJan Kara 6434daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6435daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6436957153fcSJan Kara if (err) { 6437daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6438daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6439957153fcSJan Kara } else { 6440957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6441957153fcSJan Kara handle_t *handle; 6442957153fcSJan Kara 644361a92987SJan Kara /* 644461a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 644561a92987SJan Kara * files. If this fails, we return success anyway since quotas 644661a92987SJan Kara * are already enabled and this is not a hard failure. 644761a92987SJan Kara */ 6448957153fcSJan Kara inode_lock(inode); 6449957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6450957153fcSJan Kara if (IS_ERR(handle)) 6451957153fcSJan Kara goto unlock_inode; 6452957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6453957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6454957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 64554209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6456957153fcSJan Kara ext4_journal_stop(handle); 6457957153fcSJan Kara unlock_inode: 6458957153fcSJan Kara inode_unlock(inode); 6459957153fcSJan Kara } 6460daf647d2STheodore Ts'o return err; 6461ac27a0ecSDave Kleikamp } 6462ac27a0ecSDave Kleikamp 64637c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 64647c319d32SAditya Kali unsigned int flags) 64657c319d32SAditya Kali { 64667c319d32SAditya Kali int err; 64677c319d32SAditya Kali struct inode *qf_inode; 6468a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 64697c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6470689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6471689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 64727c319d32SAditya Kali }; 64737c319d32SAditya Kali 6474e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 64757c319d32SAditya Kali 64767c319d32SAditya Kali if (!qf_inums[type]) 64777c319d32SAditya Kali return -EPERM; 64787c319d32SAditya Kali 64798a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 64807c319d32SAditya Kali if (IS_ERR(qf_inode)) { 64817c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 64827c319d32SAditya Kali return PTR_ERR(qf_inode); 64837c319d32SAditya Kali } 64847c319d32SAditya Kali 6485bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6486bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6487daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 64887212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6489daf647d2STheodore Ts'o if (err) 6490daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 649161157b24SPan Bian iput(qf_inode); 64927c319d32SAditya Kali 64937c319d32SAditya Kali return err; 64947c319d32SAditya Kali } 64957c319d32SAditya Kali 64967c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 649725c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 64987c319d32SAditya Kali { 64997c319d32SAditya Kali int type, err = 0; 6500a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 65017c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6502689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6503689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 65047c319d32SAditya Kali }; 650549da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 650649da9392SJan Kara test_opt(sb, USRQUOTA), 650749da9392SJan Kara test_opt(sb, GRPQUOTA), 650849da9392SJan Kara test_opt(sb, PRJQUOTA), 650949da9392SJan Kara }; 65107c319d32SAditya Kali 651191389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6512a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 65137c319d32SAditya Kali if (qf_inums[type]) { 65147c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 651549da9392SJan Kara DQUOT_USAGE_ENABLED | 651649da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 65177c319d32SAditya Kali if (err) { 65187c319d32SAditya Kali ext4_warning(sb, 651972ba7450STheodore Ts'o "Failed to enable quota tracking " 652072ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 652172ba7450STheodore Ts'o "e2fsck to fix.", type, err); 65227f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 65237f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 65247f144fd0SJunichi Uekawa 65257c319d32SAditya Kali return err; 65267c319d32SAditya Kali } 65277c319d32SAditya Kali } 65287c319d32SAditya Kali } 65297c319d32SAditya Kali return 0; 65307c319d32SAditya Kali } 65317c319d32SAditya Kali 6532ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6533ca0e05e4SDmitry Monakhov { 653421f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 653521f97697SJan Kara handle_t *handle; 6536957153fcSJan Kara int err; 653721f97697SJan Kara 653887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 653987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 654087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6541ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6542ca0e05e4SDmitry Monakhov 6543957153fcSJan Kara if (!inode || !igrab(inode)) 65440b268590SAmir Goldstein goto out; 65450b268590SAmir Goldstein 6546957153fcSJan Kara err = dquot_quota_off(sb, type); 6547964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6548957153fcSJan Kara goto out_put; 6549957153fcSJan Kara 6550957153fcSJan Kara inode_lock(inode); 655161a92987SJan Kara /* 655261a92987SJan Kara * Update modification times of quota files when userspace can 655361a92987SJan Kara * start looking at them. If we fail, we return success anyway since 655461a92987SJan Kara * this is not a hard failure and quotas are already disabled. 655561a92987SJan Kara */ 65569924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 65574209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 65584209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6559957153fcSJan Kara goto out_unlock; 65604209ae12SHarshad Shirwadkar } 6561957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6562957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6563eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 65644209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 656521f97697SJan Kara ext4_journal_stop(handle); 6566957153fcSJan Kara out_unlock: 6567957153fcSJan Kara inode_unlock(inode); 6568957153fcSJan Kara out_put: 6569964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6570957153fcSJan Kara iput(inode); 6571957153fcSJan Kara return err; 657221f97697SJan Kara out: 6573ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6574ca0e05e4SDmitry Monakhov } 6575ca0e05e4SDmitry Monakhov 6576ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6577ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6578ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6579ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6580617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6581ac27a0ecSDave Kleikamp size_t len, loff_t off) 6582ac27a0ecSDave Kleikamp { 6583ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6584725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6585ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6586ac27a0ecSDave Kleikamp int tocopy; 6587ac27a0ecSDave Kleikamp size_t toread; 6588ac27a0ecSDave Kleikamp struct buffer_head *bh; 6589ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6590ac27a0ecSDave Kleikamp 6591ac27a0ecSDave Kleikamp if (off > i_size) 6592ac27a0ecSDave Kleikamp return 0; 6593ac27a0ecSDave Kleikamp if (off+len > i_size) 6594ac27a0ecSDave Kleikamp len = i_size-off; 6595ac27a0ecSDave Kleikamp toread = len; 6596ac27a0ecSDave Kleikamp while (toread > 0) { 6597ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6598ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 65991c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 66001c215028STheodore Ts'o if (IS_ERR(bh)) 66011c215028STheodore Ts'o return PTR_ERR(bh); 6602ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6603ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6604ac27a0ecSDave Kleikamp else 6605ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6606ac27a0ecSDave Kleikamp brelse(bh); 6607ac27a0ecSDave Kleikamp offset = 0; 6608ac27a0ecSDave Kleikamp toread -= tocopy; 6609ac27a0ecSDave Kleikamp data += tocopy; 6610ac27a0ecSDave Kleikamp blk++; 6611ac27a0ecSDave Kleikamp } 6612ac27a0ecSDave Kleikamp return len; 6613ac27a0ecSDave Kleikamp } 6614ac27a0ecSDave Kleikamp 6615ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6616ac27a0ecSDave Kleikamp * enough credits) */ 6617617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6618ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6619ac27a0ecSDave Kleikamp { 6620ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6621725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 66224209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6623c5e298aeSTheodore Ts'o int retries = 0; 6624ac27a0ecSDave Kleikamp struct buffer_head *bh; 6625ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6626ac27a0ecSDave Kleikamp 66270390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 6628b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6629b31e1552SEric Sandeen " cancelled because transaction is not started", 66309c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 66319c3013e9SJan Kara return -EIO; 66329c3013e9SJan Kara } 663367eeb568SDmitry Monakhov /* 663467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 663567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 663667eeb568SDmitry Monakhov */ 663767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 663867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 663967eeb568SDmitry Monakhov " cancelled because not block aligned", 664067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 664167eeb568SDmitry Monakhov return -EIO; 664267eeb568SDmitry Monakhov } 664367eeb568SDmitry Monakhov 6644c5e298aeSTheodore Ts'o do { 6645c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6646c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6647c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 664845586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6649c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 66501c215028STheodore Ts'o if (IS_ERR(bh)) 66511c215028STheodore Ts'o return PTR_ERR(bh); 6652ac27a0ecSDave Kleikamp if (!bh) 6653ac27a0ecSDave Kleikamp goto out; 66545d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6655188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 6656ac27a0ecSDave Kleikamp if (err) { 6657ac27a0ecSDave Kleikamp brelse(bh); 66581c215028STheodore Ts'o return err; 6659ac27a0ecSDave Kleikamp } 6660ac27a0ecSDave Kleikamp lock_buffer(bh); 666167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6662ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6663ac27a0ecSDave Kleikamp unlock_buffer(bh); 66640390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6665ac27a0ecSDave Kleikamp brelse(bh); 6666ac27a0ecSDave Kleikamp out: 666767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 666867eeb568SDmitry Monakhov i_size_write(inode, off + len); 6669617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 66704209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 66714209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 66724209ae12SHarshad Shirwadkar err = err2; 667321f97697SJan Kara } 66744209ae12SHarshad Shirwadkar return err ? err : len; 6675ac27a0ecSDave Kleikamp } 6676ac27a0ecSDave Kleikamp #endif 6677ac27a0ecSDave Kleikamp 6678152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 6679152a0836SAl Viro const char *dev_name, void *data) 6680ac27a0ecSDave Kleikamp { 6681152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 6682ac27a0ecSDave Kleikamp } 6683ac27a0ecSDave Kleikamp 6684c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 668524b58424STheodore Ts'o static inline void register_as_ext2(void) 668624b58424STheodore Ts'o { 668724b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 668824b58424STheodore Ts'o if (err) 668924b58424STheodore Ts'o printk(KERN_WARNING 669024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 669124b58424STheodore Ts'o } 669224b58424STheodore Ts'o 669324b58424STheodore Ts'o static inline void unregister_as_ext2(void) 669424b58424STheodore Ts'o { 669524b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 669624b58424STheodore Ts'o } 66972035e776STheodore Ts'o 66982035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 66992035e776STheodore Ts'o { 6700e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 67012035e776STheodore Ts'o return 0; 6702bc98a42cSDavid Howells if (sb_rdonly(sb)) 67032035e776STheodore Ts'o return 1; 6704e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 67052035e776STheodore Ts'o return 0; 67062035e776STheodore Ts'o return 1; 67072035e776STheodore Ts'o } 670824b58424STheodore Ts'o #else 670924b58424STheodore Ts'o static inline void register_as_ext2(void) { } 671024b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 67112035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 671224b58424STheodore Ts'o #endif 671324b58424STheodore Ts'o 671424b58424STheodore Ts'o static inline void register_as_ext3(void) 671524b58424STheodore Ts'o { 671624b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 671724b58424STheodore Ts'o if (err) 671824b58424STheodore Ts'o printk(KERN_WARNING 671924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 672024b58424STheodore Ts'o } 672124b58424STheodore Ts'o 672224b58424STheodore Ts'o static inline void unregister_as_ext3(void) 672324b58424STheodore Ts'o { 672424b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 672524b58424STheodore Ts'o } 67262035e776STheodore Ts'o 67272035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 67282035e776STheodore Ts'o { 6729e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 67302035e776STheodore Ts'o return 0; 6731e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 67322035e776STheodore Ts'o return 0; 6733bc98a42cSDavid Howells if (sb_rdonly(sb)) 67342035e776STheodore Ts'o return 1; 6735e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 67362035e776STheodore Ts'o return 0; 67372035e776STheodore Ts'o return 1; 67382035e776STheodore Ts'o } 673924b58424STheodore Ts'o 674003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 6741ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 674203010a33STheodore Ts'o .name = "ext4", 6743152a0836SAl Viro .mount = ext4_mount, 6744ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 674514f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 6746ac27a0ecSDave Kleikamp }; 67477f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 6748ac27a0ecSDave Kleikamp 6749e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 6750e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 6751e9e3bcecSEric Sandeen 67525dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 6753ac27a0ecSDave Kleikamp { 6754e9e3bcecSEric Sandeen int i, err; 6755c9de560dSAlex Tomas 6756e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 675707c0c5d8SAl Viro ext4_li_info = NULL; 675807c0c5d8SAl Viro 67599a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 676012e9b892SDmitry Monakhov ext4_check_flag_values(); 6761e9e3bcecSEric Sandeen 6762e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 6763e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 6764e9e3bcecSEric Sandeen 676551865fdaSZheng Liu err = ext4_init_es(); 67666fd058f7STheodore Ts'o if (err) 67676fd058f7STheodore Ts'o return err; 676851865fdaSZheng Liu 67691dc0aa46SEric Whitney err = ext4_init_pending(); 67701dc0aa46SEric Whitney if (err) 677122cfe4b4SEric Biggers goto out7; 677222cfe4b4SEric Biggers 677322cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 677422cfe4b4SEric Biggers if (err) 67751dc0aa46SEric Whitney goto out6; 67761dc0aa46SEric Whitney 677751865fdaSZheng Liu err = ext4_init_pageio(); 677851865fdaSZheng Liu if (err) 6779b5799018STheodore Ts'o goto out5; 678051865fdaSZheng Liu 67815dabfc78STheodore Ts'o err = ext4_init_system_zone(); 6782bd2d0210STheodore Ts'o if (err) 6783b5799018STheodore Ts'o goto out4; 6784857ac889SLukas Czerner 6785b5799018STheodore Ts'o err = ext4_init_sysfs(); 6786dd68314cSTheodore Ts'o if (err) 6787b5799018STheodore Ts'o goto out3; 6788857ac889SLukas Czerner 67895dabfc78STheodore Ts'o err = ext4_init_mballoc(); 6790ac27a0ecSDave Kleikamp if (err) 6791c9de560dSAlex Tomas goto out2; 6792ac27a0ecSDave Kleikamp err = init_inodecache(); 6793ac27a0ecSDave Kleikamp if (err) 6794ac27a0ecSDave Kleikamp goto out1; 6795aa75f4d3SHarshad Shirwadkar 6796aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 6797aa75f4d3SHarshad Shirwadkar if (err) 6798aa75f4d3SHarshad Shirwadkar goto out05; 6799aa75f4d3SHarshad Shirwadkar 680024b58424STheodore Ts'o register_as_ext3(); 68012035e776STheodore Ts'o register_as_ext2(); 680203010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 6803ac27a0ecSDave Kleikamp if (err) 6804ac27a0ecSDave Kleikamp goto out; 6805bfff6873SLukas Czerner 6806ac27a0ecSDave Kleikamp return 0; 6807ac27a0ecSDave Kleikamp out: 680824b58424STheodore Ts'o unregister_as_ext2(); 680924b58424STheodore Ts'o unregister_as_ext3(); 6810aa75f4d3SHarshad Shirwadkar out05: 6811ac27a0ecSDave Kleikamp destroy_inodecache(); 6812ac27a0ecSDave Kleikamp out1: 68135dabfc78STheodore Ts'o ext4_exit_mballoc(); 68149c191f70ST Makphaibulchoke out2: 6815b5799018STheodore Ts'o ext4_exit_sysfs(); 6816b5799018STheodore Ts'o out3: 6817dd68314cSTheodore Ts'o ext4_exit_system_zone(); 6818b5799018STheodore Ts'o out4: 68195dabfc78STheodore Ts'o ext4_exit_pageio(); 6820b5799018STheodore Ts'o out5: 682122cfe4b4SEric Biggers ext4_exit_post_read_processing(); 68221dc0aa46SEric Whitney out6: 682322cfe4b4SEric Biggers ext4_exit_pending(); 682422cfe4b4SEric Biggers out7: 682551865fdaSZheng Liu ext4_exit_es(); 682651865fdaSZheng Liu 6827ac27a0ecSDave Kleikamp return err; 6828ac27a0ecSDave Kleikamp } 6829ac27a0ecSDave Kleikamp 68305dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 6831ac27a0ecSDave Kleikamp { 6832bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 683324b58424STheodore Ts'o unregister_as_ext2(); 683424b58424STheodore Ts'o unregister_as_ext3(); 683503010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 6836ac27a0ecSDave Kleikamp destroy_inodecache(); 68375dabfc78STheodore Ts'o ext4_exit_mballoc(); 6838b5799018STheodore Ts'o ext4_exit_sysfs(); 68395dabfc78STheodore Ts'o ext4_exit_system_zone(); 68405dabfc78STheodore Ts'o ext4_exit_pageio(); 684122cfe4b4SEric Biggers ext4_exit_post_read_processing(); 6842dd12ed14SEric Sandeen ext4_exit_es(); 68431dc0aa46SEric Whitney ext4_exit_pending(); 6844ac27a0ecSDave Kleikamp } 6845ac27a0ecSDave Kleikamp 6846ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 684783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6848ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 68497ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 68505dabfc78STheodore Ts'o module_init(ext4_init_fs) 68515dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6852