1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427abc52c2SDan Magenheimer #include <linux/cleancache.h> 437c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 44ee73f9a5SJeff Layton #include <linux/iversion.h> 45c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 46c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 47bfff6873SLukas Czerner #include <linux/kthread.h> 48bfff6873SLukas Czerner #include <linux/freezer.h> 499a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 50e5a185c2SLukas Czerner #include <linux/fs_context.h> 51e5a185c2SLukas Czerner #include <linux/fs_parser.h> 52bfff6873SLukas Czerner 533dcf5451SChristoph Hellwig #include "ext4.h" 544a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 553dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 56ac27a0ecSDave Kleikamp #include "xattr.h" 57ac27a0ecSDave Kleikamp #include "acl.h" 583661d286STheodore Ts'o #include "mballoc.h" 590c9ec4beSDarrick J. Wong #include "fsmap.h" 60ac27a0ecSDave Kleikamp 619bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 629bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 639bffad1eSTheodore Ts'o 640b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6559ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 66e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 679f6200bbSTheodore Ts'o 68617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 69ac27a0ecSDave Kleikamp unsigned long journal_devnum); 702adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 712d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 724392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7311215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 74617ba13bSMingming Cao struct ext4_super_block *es); 7511215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 76617ba13bSMingming Cao struct ext4_super_block *es); 77617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 78617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 79617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 80c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 81c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 82152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 83152a0836SAl Viro const char *dev_name, void *data); 842035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 852035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 86bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 87bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 888f1f7453SEric Sandeen static void ext4_clear_request_list(void); 89c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 90c6cb7e77SEric Whitney unsigned int journal_inum); 91da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc); 92*e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 93*e6e268cbSLukas Czerner struct super_block *sb); 94*e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 95*e6e268cbSLukas Czerner struct super_block *sb); 96ac27a0ecSDave Kleikamp 97e74031fdSJan Kara /* 98e74031fdSJan Kara * Lock ordering 99e74031fdSJan Kara * 100e74031fdSJan Kara * page fault path: 101d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 102d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 103e74031fdSJan Kara * 104e74031fdSJan Kara * buffered write path: 105c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 106e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 107e74031fdSJan Kara * i_data_sem (rw) 108e74031fdSJan Kara * 109e74031fdSJan Kara * truncate: 110d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 111d4f5258eSJan Kara * page lock 112d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1131d39834fSNikolay Borisov * i_data_sem (rw) 114e74031fdSJan Kara * 115e74031fdSJan Kara * direct IO: 116c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1171d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 118e74031fdSJan Kara * 119e74031fdSJan Kara * writepages: 120e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 121e74031fdSJan Kara */ 122e74031fdSJan Kara 123c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1242035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1252035e776STheodore Ts'o .owner = THIS_MODULE, 1262035e776STheodore Ts'o .name = "ext2", 1272035e776STheodore Ts'o .mount = ext4_mount, 1282035e776STheodore Ts'o .kill_sb = kill_block_super, 1292035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1302035e776STheodore Ts'o }; 1317f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 132fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1332035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1342035e776STheodore Ts'o #else 1352035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1362035e776STheodore Ts'o #endif 1372035e776STheodore Ts'o 1382035e776STheodore Ts'o 139ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 140ba69f9abSJan Kara .owner = THIS_MODULE, 141ba69f9abSJan Kara .name = "ext3", 142152a0836SAl Viro .mount = ext4_mount, 143ba69f9abSJan Kara .kill_sb = kill_block_super, 144ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 145ba69f9abSJan Kara }; 1467f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 147fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 148ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 149bd81d8eeSLaurent Vivier 150fa491b14Szhangyi (F) 151fa491b14Szhangyi (F) static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags, 152fa491b14Szhangyi (F) bh_end_io_t *end_io) 153fa491b14Szhangyi (F) { 154fb265c9cSTheodore Ts'o /* 155fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 156fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 157fa491b14Szhangyi (F) * recheck the buffer contents. 158fa491b14Szhangyi (F) */ 159fa491b14Szhangyi (F) clear_buffer_verified(bh); 160fa491b14Szhangyi (F) 161fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 162fa491b14Szhangyi (F) get_bh(bh); 163fa491b14Szhangyi (F) submit_bh(REQ_OP_READ, op_flags, bh); 164fa491b14Szhangyi (F) } 165fa491b14Szhangyi (F) 166fa491b14Szhangyi (F) void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 167fa491b14Szhangyi (F) bh_end_io_t *end_io) 168fa491b14Szhangyi (F) { 169fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 170fa491b14Szhangyi (F) 171fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 172fa491b14Szhangyi (F) unlock_buffer(bh); 173fa491b14Szhangyi (F) return; 174fa491b14Szhangyi (F) } 175fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 176fa491b14Szhangyi (F) } 177fa491b14Szhangyi (F) 178fa491b14Szhangyi (F) int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io) 179fa491b14Szhangyi (F) { 180fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 181fa491b14Szhangyi (F) 182fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 183fa491b14Szhangyi (F) unlock_buffer(bh); 184fa491b14Szhangyi (F) return 0; 185fa491b14Szhangyi (F) } 186fa491b14Szhangyi (F) 187fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 188fa491b14Szhangyi (F) 189fa491b14Szhangyi (F) wait_on_buffer(bh); 190fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 191fa491b14Szhangyi (F) return 0; 192fa491b14Szhangyi (F) return -EIO; 193fa491b14Szhangyi (F) } 194fa491b14Szhangyi (F) 195fa491b14Szhangyi (F) int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait) 196fa491b14Szhangyi (F) { 197fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 198fa491b14Szhangyi (F) if (wait) 199fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 200fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 201fa491b14Szhangyi (F) return 0; 202fa491b14Szhangyi (F) } 203fa491b14Szhangyi (F) if (wait) { 204fa491b14Szhangyi (F) wait_on_buffer(bh); 205fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 206fa491b14Szhangyi (F) return 0; 207fa491b14Szhangyi (F) return -EIO; 208fa491b14Szhangyi (F) } 209fa491b14Szhangyi (F) return 0; 210fa491b14Szhangyi (F) } 211fa491b14Szhangyi (F) 212fb265c9cSTheodore Ts'o /* 2138394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 214fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 215fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 216fb265c9cSTheodore Ts'o * return. 217fb265c9cSTheodore Ts'o */ 2188394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 2198394a6abSzhangyi (F) sector_t block, int op_flags, 2208394a6abSzhangyi (F) gfp_t gfp) 221fb265c9cSTheodore Ts'o { 2222d069c08Szhangyi (F) struct buffer_head *bh; 2232d069c08Szhangyi (F) int ret; 224fb265c9cSTheodore Ts'o 2258394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 226fb265c9cSTheodore Ts'o if (bh == NULL) 227fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 228cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 229fb265c9cSTheodore Ts'o return bh; 2302d069c08Szhangyi (F) 2312d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2322d069c08Szhangyi (F) if (ret) { 233fb265c9cSTheodore Ts'o put_bh(bh); 2342d069c08Szhangyi (F) return ERR_PTR(ret); 2352d069c08Szhangyi (F) } 2362d069c08Szhangyi (F) return bh; 237fb265c9cSTheodore Ts'o } 238fb265c9cSTheodore Ts'o 2398394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 2408394a6abSzhangyi (F) int op_flags) 2418394a6abSzhangyi (F) { 2428394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2438394a6abSzhangyi (F) } 2448394a6abSzhangyi (F) 2458394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2468394a6abSzhangyi (F) sector_t block) 2478394a6abSzhangyi (F) { 2488394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2498394a6abSzhangyi (F) } 2508394a6abSzhangyi (F) 2515df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2525df1d412Szhangyi (F) { 2535df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2545df1d412Szhangyi (F) 2555df1d412Szhangyi (F) if (likely(bh)) { 2565df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2575df1d412Szhangyi (F) brelse(bh); 2585df1d412Szhangyi (F) } 259c197855eSStephen Hemminger } 260a9c47317SDarrick J. Wong 261a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2629aa5d32bSDmitry Monakhov struct ext4_super_block *es) 263a9c47317SDarrick J. Wong { 264a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 265a9c47317SDarrick J. Wong return 1; 266a9c47317SDarrick J. Wong 267a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 26806db49e6STheodore Ts'o } 269a9c47317SDarrick J. Wong 27006db49e6STheodore Ts'o static __le32 ext4_superblock_csum(struct super_block *sb, 27106db49e6STheodore Ts'o struct ext4_super_block *es) 2729aa5d32bSDmitry Monakhov { 273a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 274a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 275a9c47317SDarrick J. Wong __u32 csum; 276a9c47317SDarrick J. Wong 277a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 2789933fc0aSTheodore Ts'o 2799933fc0aSTheodore Ts'o return cpu_to_le32(csum); 2809933fc0aSTheodore Ts'o } 2819933fc0aSTheodore Ts'o 2828be04b93SJoe Perches static int ext4_superblock_csum_verify(struct super_block *sb, 2839933fc0aSTheodore Ts'o struct ext4_super_block *es) 2849933fc0aSTheodore Ts'o { 2859933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2869933fc0aSTheodore Ts'o return 1; 2879933fc0aSTheodore Ts'o 2889933fc0aSTheodore Ts'o return es->s_checksum == ext4_superblock_csum(sb, es); 2899933fc0aSTheodore Ts'o } 2909933fc0aSTheodore Ts'o 2919933fc0aSTheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 2928be04b93SJoe Perches { 2939933fc0aSTheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2949933fc0aSTheodore Ts'o 2959933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2969933fc0aSTheodore Ts'o return; 2979933fc0aSTheodore Ts'o 2988fadc143SAlexandre Ratchov es->s_checksum = ext4_superblock_csum(sb, es); 2998fadc143SAlexandre Ratchov } 300bd81d8eeSLaurent Vivier 301bd81d8eeSLaurent Vivier ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 302bd81d8eeSLaurent Vivier struct ext4_group_desc *bg) 303bd81d8eeSLaurent Vivier { 3043a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3058fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3068fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 307bd81d8eeSLaurent Vivier } 308bd81d8eeSLaurent Vivier 3098fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3108fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 311bd81d8eeSLaurent Vivier { 3125272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3138fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3148fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 315bd81d8eeSLaurent Vivier } 316bd81d8eeSLaurent Vivier 3178fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3188fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 319bd81d8eeSLaurent Vivier { 3205272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3218fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3228fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 323bd81d8eeSLaurent Vivier } 324bd81d8eeSLaurent Vivier 325021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 326560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 327560671a0SAneesh Kumar K.V { 328560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 329560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 330560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 331560671a0SAneesh Kumar K.V } 332560671a0SAneesh Kumar K.V 333560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 334560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 335560671a0SAneesh Kumar K.V { 336560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 337560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 338560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 339560671a0SAneesh Kumar K.V } 340560671a0SAneesh Kumar K.V 341560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 342560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 343560671a0SAneesh Kumar K.V { 344560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 345560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 346560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 347560671a0SAneesh Kumar K.V } 348560671a0SAneesh Kumar K.V 349560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 350560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 351560671a0SAneesh Kumar K.V { 352560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 353560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 354560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 355560671a0SAneesh Kumar K.V } 356560671a0SAneesh Kumar K.V 3578fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3588fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 359bd81d8eeSLaurent Vivier { 3603a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3618fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3628fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 363bd81d8eeSLaurent Vivier } 364bd81d8eeSLaurent Vivier 3658fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3668fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 367bd81d8eeSLaurent Vivier { 3685272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3698fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3708fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 371bd81d8eeSLaurent Vivier } 372bd81d8eeSLaurent Vivier 3738fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3748fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 375bd81d8eeSLaurent Vivier { 3765272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3778fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3788fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 379bd81d8eeSLaurent Vivier } 380bd81d8eeSLaurent Vivier 381021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 382560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 383560671a0SAneesh Kumar K.V { 384560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 385560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 386560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 387560671a0SAneesh Kumar K.V } 388560671a0SAneesh Kumar K.V 389560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 390560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 391560671a0SAneesh Kumar K.V { 392560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 393560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 394560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 395560671a0SAneesh Kumar K.V } 396560671a0SAneesh Kumar K.V 397560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 398560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 399560671a0SAneesh Kumar K.V { 400560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 401560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 402560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 403560671a0SAneesh Kumar K.V } 404560671a0SAneesh Kumar K.V 405560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 406560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 407560671a0SAneesh Kumar K.V { 408560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 409560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 410560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 411560671a0SAneesh Kumar K.V } 412560671a0SAneesh Kumar K.V 413c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4146a0678a7SArnd Bergmann { 4156a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4166a0678a7SArnd Bergmann 4176a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4186a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4196a0678a7SArnd Bergmann } 4206a0678a7SArnd Bergmann 4216a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4226a0678a7SArnd Bergmann { 4236a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4246a0678a7SArnd Bergmann } 4256a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 426c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 427c92dc856SJan Kara ktime_get_real_seconds()) 4286a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4296a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 430d3d1faf6SCurt Wohlgemuth 431bdfe0cbdSTheodore Ts'o /* 432bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 433bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 434bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 435bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 436bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 437bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 438bdfe0cbdSTheodore Ts'o */ 439bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 440bdfe0cbdSTheodore Ts'o { 441bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 442bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 443bdfe0cbdSTheodore Ts'o 444bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 445bdfe0cbdSTheodore Ts'o } 446bdfe0cbdSTheodore Ts'o 44718aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 44818aadd47SBobi Jam { 44918aadd47SBobi Jam struct super_block *sb = journal->j_private; 45018aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 45118aadd47SBobi Jam int error = is_journal_aborted(journal); 4525d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 45318aadd47SBobi Jam 4545d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 455a0154344SDaeho Jeong 456a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 457a0154344SDaeho Jeong 45818aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4595d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4605d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4615d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 46218aadd47SBobi Jam list_del_init(&jce->jce_list); 46318aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46418aadd47SBobi Jam jce->jce_func(sb, jce, error); 46518aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 46618aadd47SBobi Jam } 46718aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46818aadd47SBobi Jam } 4691c13d5c0STheodore Ts'o 470afb585a9SMauricio Faria de Oliveira /* 471afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 472afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 473afb585a9SMauricio Faria de Oliveira * 474afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 475afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 476afb585a9SMauricio Faria de Oliveira * to write protect the pages. 477afb585a9SMauricio Faria de Oliveira * 478afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 479afb585a9SMauricio Faria de Oliveira */ 480afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 481afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 482afb585a9SMauricio Faria de Oliveira void *data) 483afb585a9SMauricio Faria de Oliveira { 484afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 485afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 486afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 487afb585a9SMauricio Faria de Oliveira 488afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 489afb585a9SMauricio Faria de Oliveira do { 490afb585a9SMauricio Faria de Oliveira /* 491afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 492afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 493afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 494afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 495afb585a9SMauricio Faria de Oliveira * properly. 496afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 497afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 498afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 499afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 500afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 501afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 502afb585a9SMauricio Faria de Oliveira */ 503afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 504afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 505afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 506afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 507afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 508afb585a9SMauricio Faria de Oliveira goto out; 509afb585a9SMauricio Faria de Oliveira } 510afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 511afb585a9SMauricio Faria de Oliveira 512afb585a9SMauricio Faria de Oliveira out: 513afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 514afb585a9SMauricio Faria de Oliveira } 515afb585a9SMauricio Faria de Oliveira 516afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 517afb585a9SMauricio Faria de Oliveira { 518afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 519afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 520afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 521afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 522afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 523afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 524afb585a9SMauricio Faria de Oliveira }; 525afb585a9SMauricio Faria de Oliveira 526afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 527afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 528afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 529afb585a9SMauricio Faria de Oliveira } 530afb585a9SMauricio Faria de Oliveira 531afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 532afb585a9SMauricio Faria de Oliveira { 533afb585a9SMauricio Faria de Oliveira int ret; 534afb585a9SMauricio Faria de Oliveira 535afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 536afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 537afb585a9SMauricio Faria de Oliveira else 538afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 539afb585a9SMauricio Faria de Oliveira 540afb585a9SMauricio Faria de Oliveira return ret; 541afb585a9SMauricio Faria de Oliveira } 542afb585a9SMauricio Faria de Oliveira 543afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 544afb585a9SMauricio Faria de Oliveira { 545afb585a9SMauricio Faria de Oliveira int ret = 0; 546afb585a9SMauricio Faria de Oliveira 547afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 548afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 549afb585a9SMauricio Faria de Oliveira 550afb585a9SMauricio Faria de Oliveira return ret; 551afb585a9SMauricio Faria de Oliveira } 552afb585a9SMauricio Faria de Oliveira 5531dc1097fSJan Kara static bool system_going_down(void) 5541dc1097fSJan Kara { 5551dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5561dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5571dc1097fSJan Kara } 5581dc1097fSJan Kara 55902a7780eSJan Kara struct ext4_err_translation { 56002a7780eSJan Kara int code; 56102a7780eSJan Kara int errno; 56202a7780eSJan Kara }; 56302a7780eSJan Kara 56402a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 56502a7780eSJan Kara 56602a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 56702a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 56802a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 56902a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 57002a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 57102a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 57202a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 57302a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 57402a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 57502a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 57602a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 57702a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 58202a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 58302a7780eSJan Kara }; 58402a7780eSJan Kara 58502a7780eSJan Kara static int ext4_errno_to_code(int errno) 58602a7780eSJan Kara { 58702a7780eSJan Kara int i; 58802a7780eSJan Kara 58902a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 59002a7780eSJan Kara if (err_translation[i].errno == errno) 59102a7780eSJan Kara return err_translation[i].code; 59202a7780eSJan Kara return EXT4_ERR_UNKNOWN; 59302a7780eSJan Kara } 59402a7780eSJan Kara 5952d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 59640676623SJan Kara __u32 ino, __u64 block, 59740676623SJan Kara const char *func, unsigned int line) 59840676623SJan Kara { 599c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 60040676623SJan Kara 60102a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 60202a7780eSJan Kara if (error == 0) 60302a7780eSJan Kara error = EFSCORRUPTED; 604c92dc856SJan Kara 605c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 606c92dc856SJan Kara sbi->s_add_error_count++; 607c92dc856SJan Kara sbi->s_last_error_code = error; 608c92dc856SJan Kara sbi->s_last_error_line = line; 609c92dc856SJan Kara sbi->s_last_error_ino = ino; 610c92dc856SJan Kara sbi->s_last_error_block = block; 611c92dc856SJan Kara sbi->s_last_error_func = func; 612c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 613c92dc856SJan Kara if (!sbi->s_first_error_time) { 614c92dc856SJan Kara sbi->s_first_error_code = error; 615c92dc856SJan Kara sbi->s_first_error_line = line; 616c92dc856SJan Kara sbi->s_first_error_ino = ino; 617c92dc856SJan Kara sbi->s_first_error_block = block; 618c92dc856SJan Kara sbi->s_first_error_func = func; 619c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 62040676623SJan Kara } 621c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 62240676623SJan Kara } 62340676623SJan Kara 624ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 625ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 626ac27a0ecSDave Kleikamp * 627ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 628617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 629ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 630ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 631ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 632ac27a0ecSDave Kleikamp * write out the superblock safely. 633ac27a0ecSDave Kleikamp * 634dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 635d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 636ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 637014c9caaSJan Kara * 638014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 639014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 640014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 641014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 642014c9caaSJan Kara * at a critical moment in log management. 643ac27a0ecSDave Kleikamp */ 644e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 645e789ca0cSJan Kara __u32 ino, __u64 block, 646e789ca0cSJan Kara const char *func, unsigned int line) 647ac27a0ecSDave Kleikamp { 648b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6492d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 650b08070ecSJan Kara 651e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 652327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 653327eaf73STheodore Ts'o WARN_ON_ONCE(1); 654327eaf73STheodore Ts'o 6552d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6569b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 657ac27a0ecSDave Kleikamp if (journal) 658dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6592d01ddc8SJan Kara } 6602d01ddc8SJan Kara 6612d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6622d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6632d01ddc8SJan Kara /* 6642d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6652d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6662d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6672d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6682d01ddc8SJan Kara */ 669bb9464e0Syangerkun if (continue_fs && journal) 6702d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6712d01ddc8SJan Kara else 6722d01ddc8SJan Kara ext4_commit_super(sb); 6732d01ddc8SJan Kara } 6742d01ddc8SJan Kara 6751dc1097fSJan Kara /* 6761dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6771dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6781dc1097fSJan Kara * disabled. 6791dc1097fSJan Kara */ 680014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 681617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 682ac27a0ecSDave Kleikamp sb->s_id); 683ac27a0ecSDave Kleikamp } 684ac2f7ca5SYe Bin 685ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 686ac2f7ca5SYe Bin return; 687ac2f7ca5SYe Bin 688014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 689014c9caaSJan Kara /* 690014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 691014c9caaSJan Kara * ->s_flags update 692014c9caaSJan Kara */ 693014c9caaSJan Kara smp_wmb(); 694014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 6954327ba52SDaeho Jeong } 696ac27a0ecSDave Kleikamp 697c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 698c92dc856SJan Kara { 699c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 700c92dc856SJan Kara s_error_work); 7012d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7022d01ddc8SJan Kara handle_t *handle; 703c92dc856SJan Kara 7042d01ddc8SJan Kara /* 7052d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7062d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7072d01ddc8SJan Kara * updates. 7082d01ddc8SJan Kara * 7092d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7102d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7112d01ddc8SJan Kara */ 7122d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 713558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7142d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7152d01ddc8SJan Kara if (IS_ERR(handle)) 7162d01ddc8SJan Kara goto write_directly; 717558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7182d01ddc8SJan Kara jbd2_journal_stop(handle); 7192d01ddc8SJan Kara goto write_directly; 7202d01ddc8SJan Kara } 7212d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 722558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 723558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 724558d6450SYe Bin "superblock detected"); 725558d6450SYe Bin clear_buffer_write_io_error(sbh); 726558d6450SYe Bin set_buffer_uptodate(sbh); 727558d6450SYe Bin } 728558d6450SYe Bin 729558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7302d01ddc8SJan Kara jbd2_journal_stop(handle); 7312d01ddc8SJan Kara goto write_directly; 7322d01ddc8SJan Kara } 7332d01ddc8SJan Kara jbd2_journal_stop(handle); 734d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7352d01ddc8SJan Kara return; 7362d01ddc8SJan Kara } 7372d01ddc8SJan Kara write_directly: 7382d01ddc8SJan Kara /* 7392d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7402d01ddc8SJan Kara * out and hope for the best. 7412d01ddc8SJan Kara */ 7424392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 743d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 744ac27a0ecSDave Kleikamp } 745ac27a0ecSDave Kleikamp 746efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 747efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 748efbed4dcSTheodore Ts'o "EXT4-fs error") 749efbed4dcSTheodore Ts'o 75012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 751014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 75254d3adbcSTheodore Ts'o const char *fmt, ...) 753ac27a0ecSDave Kleikamp { 7540ff2ea7dSJoe Perches struct va_format vaf; 755ac27a0ecSDave Kleikamp va_list args; 756ac27a0ecSDave Kleikamp 7570db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7580db1ff22STheodore Ts'o return; 7590db1ff22STheodore Ts'o 760ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 761efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 762ac27a0ecSDave Kleikamp va_start(args, fmt); 7630ff2ea7dSJoe Perches vaf.fmt = fmt; 7640ff2ea7dSJoe Perches vaf.va = &args; 765efbed4dcSTheodore Ts'o printk(KERN_CRIT 766efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7670ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 768ac27a0ecSDave Kleikamp va_end(args); 769efbed4dcSTheodore Ts'o } 7709a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7719a089b21SGabriel Krisman Bertazi 772e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 773ac27a0ecSDave Kleikamp } 774ac27a0ecSDave Kleikamp 775e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 77654d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 777273df556SFrank Mayhar const char *fmt, ...) 778273df556SFrank Mayhar { 779273df556SFrank Mayhar va_list args; 780f7c21177STheodore Ts'o struct va_format vaf; 781273df556SFrank Mayhar 7820db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7830db1ff22STheodore Ts'o return; 7840db1ff22STheodore Ts'o 785ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 786efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 787273df556SFrank Mayhar va_start(args, fmt); 788f7c21177STheodore Ts'o vaf.fmt = fmt; 789f7c21177STheodore Ts'o vaf.va = &args; 790c398eda0STheodore Ts'o if (block) 791d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 792d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 793d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 794d9ee81daSJoe Perches block, current->comm, &vaf); 795d9ee81daSJoe Perches else 796d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 797d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 798d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 799d9ee81daSJoe Perches current->comm, &vaf); 800273df556SFrank Mayhar va_end(args); 801efbed4dcSTheodore Ts'o } 8029a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8039a089b21SGabriel Krisman Bertazi 804e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 80554d3adbcSTheodore Ts'o function, line); 806273df556SFrank Mayhar } 807273df556SFrank Mayhar 808e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 809f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 810f7c21177STheodore Ts'o const char *fmt, ...) 811273df556SFrank Mayhar { 812273df556SFrank Mayhar va_list args; 813f7c21177STheodore Ts'o struct va_format vaf; 814496ad9aaSAl Viro struct inode *inode = file_inode(file); 815273df556SFrank Mayhar char pathname[80], *path; 816273df556SFrank Mayhar 8170db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8180db1ff22STheodore Ts'o return; 8190db1ff22STheodore Ts'o 820ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 821efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8229bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 823f9a62d09SDan Carpenter if (IS_ERR(path)) 824273df556SFrank Mayhar path = "(unknown)"; 825f7c21177STheodore Ts'o va_start(args, fmt); 826f7c21177STheodore Ts'o vaf.fmt = fmt; 827f7c21177STheodore Ts'o vaf.va = &args; 828d9ee81daSJoe Perches if (block) 829d9ee81daSJoe Perches printk(KERN_CRIT 830d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 831d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 832d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 833d9ee81daSJoe Perches block, current->comm, path, &vaf); 834d9ee81daSJoe Perches else 835d9ee81daSJoe Perches printk(KERN_CRIT 836d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 837d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 838d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 839d9ee81daSJoe Perches current->comm, path, &vaf); 840273df556SFrank Mayhar va_end(args); 841efbed4dcSTheodore Ts'o } 8429a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8439a089b21SGabriel Krisman Bertazi 844e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 84554d3adbcSTheodore Ts'o function, line); 846273df556SFrank Mayhar } 847273df556SFrank Mayhar 848722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 849ac27a0ecSDave Kleikamp char nbuf[16]) 850ac27a0ecSDave Kleikamp { 851ac27a0ecSDave Kleikamp char *errstr = NULL; 852ac27a0ecSDave Kleikamp 853ac27a0ecSDave Kleikamp switch (errno) { 8546a797d27SDarrick J. Wong case -EFSCORRUPTED: 8556a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8566a797d27SDarrick J. Wong break; 8576a797d27SDarrick J. Wong case -EFSBADCRC: 8586a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8596a797d27SDarrick J. Wong break; 860ac27a0ecSDave Kleikamp case -EIO: 861ac27a0ecSDave Kleikamp errstr = "IO failure"; 862ac27a0ecSDave Kleikamp break; 863ac27a0ecSDave Kleikamp case -ENOMEM: 864ac27a0ecSDave Kleikamp errstr = "Out of memory"; 865ac27a0ecSDave Kleikamp break; 866ac27a0ecSDave Kleikamp case -EROFS: 86778f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 86878f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 869ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 870ac27a0ecSDave Kleikamp else 871ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 872ac27a0ecSDave Kleikamp break; 873ac27a0ecSDave Kleikamp default: 874ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 875ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 876ac27a0ecSDave Kleikamp * NULL. */ 877ac27a0ecSDave Kleikamp if (nbuf) { 878ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 879ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 880ac27a0ecSDave Kleikamp errstr = nbuf; 881ac27a0ecSDave Kleikamp } 882ac27a0ecSDave Kleikamp break; 883ac27a0ecSDave Kleikamp } 884ac27a0ecSDave Kleikamp 885ac27a0ecSDave Kleikamp return errstr; 886ac27a0ecSDave Kleikamp } 887ac27a0ecSDave Kleikamp 888617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 889ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 890ac27a0ecSDave Kleikamp 891c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 892c398eda0STheodore Ts'o unsigned int line, int errno) 893ac27a0ecSDave Kleikamp { 894ac27a0ecSDave Kleikamp char nbuf[16]; 895ac27a0ecSDave Kleikamp const char *errstr; 896ac27a0ecSDave Kleikamp 8970db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 8980db1ff22STheodore Ts'o return; 8990db1ff22STheodore Ts'o 900ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 901ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 902ac27a0ecSDave Kleikamp * an error. */ 903bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 904ac27a0ecSDave Kleikamp return; 905ac27a0ecSDave Kleikamp 906efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 907617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 908c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 909c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 910efbed4dcSTheodore Ts'o } 9119a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 912ac27a0ecSDave Kleikamp 913e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 914ac27a0ecSDave Kleikamp } 915ac27a0ecSDave Kleikamp 916e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 917e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 918b31e1552SEric Sandeen { 9190ff2ea7dSJoe Perches struct va_format vaf; 920b31e1552SEric Sandeen va_list args; 921b31e1552SEric Sandeen 922da812f61SLukas Czerner if (sb) { 9231cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 924da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 925da812f61SLukas Czerner "EXT4-fs")) 926efbed4dcSTheodore Ts'o return; 927da812f61SLukas Czerner } 928efbed4dcSTheodore Ts'o 929b31e1552SEric Sandeen va_start(args, fmt); 9300ff2ea7dSJoe Perches vaf.fmt = fmt; 9310ff2ea7dSJoe Perches vaf.va = &args; 932da812f61SLukas Czerner if (sb) 9330ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 934da812f61SLukas Czerner else 935da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 936b31e1552SEric Sandeen va_end(args); 937b31e1552SEric Sandeen } 938b31e1552SEric Sandeen 9391cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9401cf006edSDmitry Monakhov { 9411cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9421cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9431cf006edSDmitry Monakhov "EXT4-fs warning"); 9441cf006edSDmitry Monakhov } 945b03a2f7eSAndreas Dilger 94612062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 947c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 948ac27a0ecSDave Kleikamp { 9490ff2ea7dSJoe Perches struct va_format vaf; 950ac27a0ecSDave Kleikamp va_list args; 951ac27a0ecSDave Kleikamp 952b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 953efbed4dcSTheodore Ts'o return; 954efbed4dcSTheodore Ts'o 955ac27a0ecSDave Kleikamp va_start(args, fmt); 9560ff2ea7dSJoe Perches vaf.fmt = fmt; 9570ff2ea7dSJoe Perches vaf.va = &args; 9580ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9590ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 960ac27a0ecSDave Kleikamp va_end(args); 961ac27a0ecSDave Kleikamp } 962ac27a0ecSDave Kleikamp 963b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 964b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 965b03a2f7eSAndreas Dilger { 966b03a2f7eSAndreas Dilger struct va_format vaf; 967b03a2f7eSAndreas Dilger va_list args; 968b03a2f7eSAndreas Dilger 969b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 970b03a2f7eSAndreas Dilger return; 971b03a2f7eSAndreas Dilger 972b03a2f7eSAndreas Dilger va_start(args, fmt); 973b03a2f7eSAndreas Dilger vaf.fmt = fmt; 974b03a2f7eSAndreas Dilger vaf.va = &args; 975b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 976b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 977b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 978b03a2f7eSAndreas Dilger va_end(args); 979b03a2f7eSAndreas Dilger } 980b03a2f7eSAndreas Dilger 981e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 982e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 983e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 984e29136f8STheodore Ts'o const char *fmt, ...) 9855d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9865d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9875d1b1b3fSAneesh Kumar K.V { 9880ff2ea7dSJoe Perches struct va_format vaf; 9895d1b1b3fSAneesh Kumar K.V va_list args; 9905d1b1b3fSAneesh Kumar K.V 9910db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9920db1ff22STheodore Ts'o return; 9930db1ff22STheodore Ts'o 994ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 995efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 9965d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 9970ff2ea7dSJoe Perches vaf.fmt = fmt; 9980ff2ea7dSJoe Perches vaf.va = &args; 99921149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1000e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1001e29136f8STheodore Ts'o if (ino) 10020ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1003e29136f8STheodore Ts'o if (block) 1004efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1005efbed4dcSTheodore Ts'o (unsigned long long) block); 10060ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10075d1b1b3fSAneesh Kumar K.V va_end(args); 1008efbed4dcSTheodore Ts'o } 10095d1b1b3fSAneesh Kumar K.V 1010c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1011327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1012327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1013e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10142d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10152d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10162d01ddc8SJan Kara line); 1017c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10182d01ddc8SJan Kara } 10195d1b1b3fSAneesh Kumar K.V return; 10205d1b1b3fSAneesh Kumar K.V } 10215d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1022e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10235d1b1b3fSAneesh Kumar K.V /* 10245d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10255d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10265d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10275d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10285d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 102925985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10305d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10315d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10325d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10335d1b1b3fSAneesh Kumar K.V */ 10345d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10355d1b1b3fSAneesh Kumar K.V return; 10365d1b1b3fSAneesh Kumar K.V } 10375d1b1b3fSAneesh Kumar K.V 1038db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1039db79e6d1SWang Shilong ext4_group_t group, 1040db79e6d1SWang Shilong unsigned int flags) 1041db79e6d1SWang Shilong { 1042db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1043db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1044db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10459af0b3d1SWang Shilong int ret; 1046db79e6d1SWang Shilong 10479af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10489af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10499af0b3d1SWang Shilong &grp->bb_state); 10509af0b3d1SWang Shilong if (!ret) 1051db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1052db79e6d1SWang Shilong grp->bb_free); 1053db79e6d1SWang Shilong } 1054db79e6d1SWang Shilong 10559af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10569af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10579af0b3d1SWang Shilong &grp->bb_state); 10589af0b3d1SWang Shilong if (!ret && gdp) { 1059db79e6d1SWang Shilong int count; 1060db79e6d1SWang Shilong 1061db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1062db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1063db79e6d1SWang Shilong count); 1064db79e6d1SWang Shilong } 1065db79e6d1SWang Shilong } 1066db79e6d1SWang Shilong } 1067db79e6d1SWang Shilong 1068617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1069ac27a0ecSDave Kleikamp { 1070617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1071ac27a0ecSDave Kleikamp 1072617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1073ac27a0ecSDave Kleikamp return; 1074ac27a0ecSDave Kleikamp 107512062dddSEric Sandeen ext4_warning(sb, 1076ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1077ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1078617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1079ac27a0ecSDave Kleikamp 1080617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1081617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1082617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1083ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1084ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1085ac27a0ecSDave Kleikamp 1086ac27a0ecSDave Kleikamp /* 1087ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1088ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1089ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1090ac27a0ecSDave Kleikamp */ 1091ac27a0ecSDave Kleikamp } 1092ac27a0ecSDave Kleikamp 1093ac27a0ecSDave Kleikamp /* 1094ac27a0ecSDave Kleikamp * Open the external journal device 1095ac27a0ecSDave Kleikamp */ 1096b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1097ac27a0ecSDave Kleikamp { 1098ac27a0ecSDave Kleikamp struct block_device *bdev; 1099ac27a0ecSDave Kleikamp 1100d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1101ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1102ac27a0ecSDave Kleikamp goto fail; 1103ac27a0ecSDave Kleikamp return bdev; 1104ac27a0ecSDave Kleikamp 1105ac27a0ecSDave Kleikamp fail: 1106ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1107ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1108ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1109ac27a0ecSDave Kleikamp return NULL; 1110ac27a0ecSDave Kleikamp } 1111ac27a0ecSDave Kleikamp 1112ac27a0ecSDave Kleikamp /* 1113ac27a0ecSDave Kleikamp * Release the journal device 1114ac27a0ecSDave Kleikamp */ 11154385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1116ac27a0ecSDave Kleikamp { 11174385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1118ac27a0ecSDave Kleikamp } 1119ac27a0ecSDave Kleikamp 11204385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1121ac27a0ecSDave Kleikamp { 1122ac27a0ecSDave Kleikamp struct block_device *bdev; 1123ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1124ac27a0ecSDave Kleikamp if (bdev) { 11254385bab1SAl Viro ext4_blkdev_put(bdev); 1126ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1127ac27a0ecSDave Kleikamp } 1128ac27a0ecSDave Kleikamp } 1129ac27a0ecSDave Kleikamp 1130ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1131ac27a0ecSDave Kleikamp { 1132617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1133ac27a0ecSDave Kleikamp } 1134ac27a0ecSDave Kleikamp 1135617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1136ac27a0ecSDave Kleikamp { 1137ac27a0ecSDave Kleikamp struct list_head *l; 1138ac27a0ecSDave Kleikamp 1139b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1140ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1141ac27a0ecSDave Kleikamp 1142ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1143ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1144ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1145ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1146ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1147ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1148ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1149ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1150ac27a0ecSDave Kleikamp } 1151ac27a0ecSDave Kleikamp } 1152ac27a0ecSDave Kleikamp 1153957153fcSJan Kara #ifdef CONFIG_QUOTA 1154957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1155957153fcSJan Kara 1156957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1157957153fcSJan Kara { 1158957153fcSJan Kara int type; 1159957153fcSJan Kara 1160957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1161957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1162957153fcSJan Kara ext4_quota_off(sb, type); 1163957153fcSJan Kara } 116433458eabSTheodore Ts'o 116533458eabSTheodore Ts'o /* 116633458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 116733458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 116833458eabSTheodore Ts'o */ 116933458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 117033458eabSTheodore Ts'o struct ext4_sb_info *sbi, 117133458eabSTheodore Ts'o int type) 117233458eabSTheodore Ts'o { 117333458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 117433458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 117533458eabSTheodore Ts'o } 1176957153fcSJan Kara #else 1177957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1178957153fcSJan Kara { 1179957153fcSJan Kara } 1180957153fcSJan Kara #endif 1181957153fcSJan Kara 1182617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1183ac27a0ecSDave Kleikamp { 1184617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1185617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11861d0c3924STheodore Ts'o struct buffer_head **group_desc; 11877c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 118897abd7d4STheodore Ts'o int aborted = 0; 1189ef2cabf7SHidehiro Kawai int i, err; 1190ac27a0ecSDave Kleikamp 1191857ac889SLukas Czerner ext4_unregister_li_request(sb); 1192957153fcSJan Kara ext4_quota_off_umount(sb); 1193e0ccfd95SChristoph Hellwig 1194c92dc856SJan Kara flush_work(&sbi->s_error_work); 11952e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 119602f310fcSJan Kara ext4_release_orphan_info(sb); 11974c0425ffSMingming Cao 11985e47868fSRitesh Harjani /* 11995e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 12005e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 12015e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 12025e47868fSRitesh Harjani */ 12035e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 12045e47868fSRitesh Harjani 12050390131bSFrank Mayhar if (sbi->s_journal) { 120697abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1207ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 120847b4a50bSJan Kara sbi->s_journal = NULL; 1209878520acSTheodore Ts'o if ((err < 0) && !aborted) { 121054d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12110390131bSFrank Mayhar } 1212878520acSTheodore Ts'o } 1213d4edac31SJosef Bacik 1214d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12159105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1216d4edac31SJosef Bacik ext4_release_system_zone(sb); 1217d4edac31SJosef Bacik ext4_mb_release(sb); 1218d4edac31SJosef Bacik ext4_ext_release(sb); 1219d4edac31SJosef Bacik 1220bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1221e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 122202f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1223ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1224ac27a0ecSDave Kleikamp } 1225bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12264392fbc4SJan Kara ext4_commit_super(sb); 1227a8e25a83SArtem Bityutskiy 12281d0c3924STheodore Ts'o rcu_read_lock(); 12291d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1230ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12311d0c3924STheodore Ts'o brelse(group_desc[i]); 12321d0c3924STheodore Ts'o kvfree(group_desc); 12337c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12347c990728SSuraj Jitindar Singh if (flex_groups) { 12357c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12367c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12377c990728SSuraj Jitindar Singh kvfree(flex_groups); 12387c990728SSuraj Jitindar Singh } 12391d0c3924STheodore Ts'o rcu_read_unlock(); 124057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1241ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1242ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 124357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1244efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1245bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1246ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1247a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 124833458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1249ac27a0ecSDave Kleikamp #endif 1250ac27a0ecSDave Kleikamp 1251ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1252ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1253ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1254ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1255ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1256ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1257837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1258ac27a0ecSDave Kleikamp 125989d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1260f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1261ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1262ac27a0ecSDave Kleikamp /* 1263ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1264ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1265ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1266ac27a0ecSDave Kleikamp */ 1267ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1268ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1269617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1270ac27a0ecSDave Kleikamp } 127150c15df6SChengguang Xu 1272dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1273dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 127450c15df6SChengguang Xu 127547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 127647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 127750c15df6SChengguang Xu 1278618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1279618f0031SPavel Skripkin 12809060dd2cSEric Sandeen brelse(sbi->s_sbh); 1281ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12823197ebdbSTheodore Ts'o /* 12833197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12843197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12853197ebdbSTheodore Ts'o */ 12863197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12873197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 12880441984aSDarrick J. Wong if (sbi->s_chksum_driver) 12890441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1290705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 12915e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1292ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 1293c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1294f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1295c83ad55eSGabriel Krisman Bertazi #endif 1296ac27a0ecSDave Kleikamp kfree(sbi); 1297ac27a0ecSDave Kleikamp } 1298ac27a0ecSDave Kleikamp 1299e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1300ac27a0ecSDave Kleikamp 1301ac27a0ecSDave Kleikamp /* 1302ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1303ac27a0ecSDave Kleikamp */ 1304617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1305ac27a0ecSDave Kleikamp { 1306617ba13bSMingming Cao struct ext4_inode_info *ei; 1307ac27a0ecSDave Kleikamp 1308e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1309ac27a0ecSDave Kleikamp if (!ei) 1310ac27a0ecSDave Kleikamp return NULL; 13110b8e58a1SAndreas Dilger 1312ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1313202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1314c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 131527bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1316c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13179a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13189a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1319edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1320eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1321edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1322dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1323d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1324d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13251dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1326a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1327a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 132896c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1329a9e7f447SDmitry Monakhov #endif 13308aefcd55STheodore Ts'o ei->jinode = NULL; 13312e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1332744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1333b436b9beSJan Kara ei->i_sync_tid = 0; 1334b436b9beSJan Kara ei->i_datasync_tid = 0; 1335e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13362e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1337aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1338aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1339ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1340ac27a0ecSDave Kleikamp } 1341ac27a0ecSDave Kleikamp 13427ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13437ff9c073STheodore Ts'o { 13447ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13457ff9c073STheodore Ts'o 134629b3692eSEric Biggers if (!drop) 134729b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 134829b3692eSEric Biggers 13497ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13507ff9c073STheodore Ts'o return drop; 13517ff9c073STheodore Ts'o } 13527ff9c073STheodore Ts'o 135394053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1354fa0d7e3dSNick Piggin { 13552c58d548SEric Biggers fscrypt_free_inode(inode); 1356aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1357aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1358aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1359aa75f4d3SHarshad Shirwadkar } 1360fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1361fa0d7e3dSNick Piggin } 1362fa0d7e3dSNick Piggin 1363617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1364ac27a0ecSDave Kleikamp { 13659f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1366b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1367b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1368b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13699f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13709f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13719f7dd93dSVasily Averin true); 13729f7dd93dSVasily Averin dump_stack(); 13739f7dd93dSVasily Averin } 13746fed8395SJeffle Xu 13756fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13766fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13776fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13786fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13796fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1380ac27a0ecSDave Kleikamp } 1381ac27a0ecSDave Kleikamp 138251cc5068SAlexey Dobriyan static void init_once(void *foo) 1383ac27a0ecSDave Kleikamp { 1384617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1385ac27a0ecSDave Kleikamp 1386ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1387ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 13880e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1389ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1390aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1391ac27a0ecSDave Kleikamp } 1392ac27a0ecSDave Kleikamp 1393e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1394ac27a0ecSDave Kleikamp { 1395f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1396f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1397f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1398f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1399f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1400f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 140120c2df83SPaul Mundt init_once); 1402617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1403ac27a0ecSDave Kleikamp return -ENOMEM; 1404ac27a0ecSDave Kleikamp return 0; 1405ac27a0ecSDave Kleikamp } 1406ac27a0ecSDave Kleikamp 1407ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1408ac27a0ecSDave Kleikamp { 14098c0a8537SKirill A. Shutemov /* 14108c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14118c0a8537SKirill A. Shutemov * destroy cache. 14128c0a8537SKirill A. Shutemov */ 14138c0a8537SKirill A. Shutemov rcu_barrier(); 1414617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1415ac27a0ecSDave Kleikamp } 1416ac27a0ecSDave Kleikamp 14170930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1418ac27a0ecSDave Kleikamp { 1419aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14200930fcc1SAl Viro invalidate_inode_buffers(inode); 1421dbd5768fSJan Kara clear_inode(inode); 142227bc446eSbrookxu ext4_discard_preallocations(inode, 0); 142351865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1424f4c2d372SJan Kara dquot_drop(inode); 14258aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14268aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14278aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14288aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14298aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14308aefcd55STheodore Ts'o } 14313d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1432c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1433ac27a0ecSDave Kleikamp } 1434ac27a0ecSDave Kleikamp 14351b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14361b961ac0SChristoph Hellwig u64 ino, u32 generation) 1437ac27a0ecSDave Kleikamp { 1438ac27a0ecSDave Kleikamp struct inode *inode; 1439ac27a0ecSDave Kleikamp 14408a363970STheodore Ts'o /* 1441ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1442ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1443ac27a0ecSDave Kleikamp */ 14448a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14451d1fe1eeSDavid Howells if (IS_ERR(inode)) 14461d1fe1eeSDavid Howells return ERR_CAST(inode); 14471d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1448ac27a0ecSDave Kleikamp iput(inode); 1449ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1450ac27a0ecSDave Kleikamp } 14511b961ac0SChristoph Hellwig 14521b961ac0SChristoph Hellwig return inode; 1453ac27a0ecSDave Kleikamp } 14541b961ac0SChristoph Hellwig 14551b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14561b961ac0SChristoph Hellwig int fh_len, int fh_type) 14571b961ac0SChristoph Hellwig { 14581b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14591b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14601b961ac0SChristoph Hellwig } 14611b961ac0SChristoph Hellwig 14621b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14631b961ac0SChristoph Hellwig int fh_len, int fh_type) 14641b961ac0SChristoph Hellwig { 14651b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14661b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1467ac27a0ecSDave Kleikamp } 1468ac27a0ecSDave Kleikamp 1469fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1470fde87268STheodore Ts'o { 1471fde87268STheodore Ts'o struct writeback_control wbc = { 1472fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1473fde87268STheodore Ts'o }; 1474fde87268STheodore Ts'o 1475fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1476fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1477fde87268STheodore Ts'o } 1478fde87268STheodore Ts'o 1479643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1480a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1481a7550b30SJaegeuk Kim { 1482a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1483a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1484a7550b30SJaegeuk Kim } 1485a7550b30SJaegeuk Kim 1486a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1487a7550b30SJaegeuk Kim void *fs_data) 1488a7550b30SJaegeuk Kim { 14892f8f5e76SEric Biggers handle_t *handle = fs_data; 1490c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1491a7550b30SJaegeuk Kim 14929ce0151aSEric Biggers /* 14939ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 14949ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 14959ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 14969ce0151aSEric Biggers * the filename "lost+found" itself. 14979ce0151aSEric Biggers */ 14989ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 14999ce0151aSEric Biggers return -EPERM; 1500a7550b30SJaegeuk Kim 15017d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 15027d3e06a8SRoss Zwisler return -EINVAL; 15037d3e06a8SRoss Zwisler 1504b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1505b383a73fSIra Weiny return -EOPNOTSUPP; 1506b383a73fSIra Weiny 150794840e3cSEric Biggers res = ext4_convert_inline_data(inode); 150894840e3cSEric Biggers if (res) 150994840e3cSEric Biggers return res; 151094840e3cSEric Biggers 15112f8f5e76SEric Biggers /* 15122f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 15132f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 15142f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15152f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15162f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15172f8f5e76SEric Biggers */ 15182f8f5e76SEric Biggers 15192f8f5e76SEric Biggers if (handle) { 15202f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15212f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15222f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15232f8f5e76SEric Biggers ctx, len, 0); 1524a7550b30SJaegeuk Kim if (!res) { 1525a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1526a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1527a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1528a3caa24bSJan Kara /* 15292ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15302ee6a576SEric Biggers * S_DAX may be disabled 1531a3caa24bSJan Kara */ 1532043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1533a7550b30SJaegeuk Kim } 1534a7550b30SJaegeuk Kim return res; 1535a7550b30SJaegeuk Kim } 1536a7550b30SJaegeuk Kim 1537b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1538b8cb5a54STahsin Erdogan if (res) 1539b8cb5a54STahsin Erdogan return res; 15402f8f5e76SEric Biggers retry: 1541af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1542af65207cSTahsin Erdogan &credits); 1543dec214d0STahsin Erdogan if (res) 1544dec214d0STahsin Erdogan return res; 1545dec214d0STahsin Erdogan 1546c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1547a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1548a7550b30SJaegeuk Kim return PTR_ERR(handle); 1549a7550b30SJaegeuk Kim 15502f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15512f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15522f8f5e76SEric Biggers ctx, len, 0); 1553a7550b30SJaegeuk Kim if (!res) { 1554a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15552ee6a576SEric Biggers /* 15562ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15572ee6a576SEric Biggers * S_DAX may be disabled 15582ee6a576SEric Biggers */ 1559043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1560a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1561a7550b30SJaegeuk Kim if (res) 1562a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1563a7550b30SJaegeuk Kim } 1564a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15652f8f5e76SEric Biggers 15662f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15672f8f5e76SEric Biggers goto retry; 1568a7550b30SJaegeuk Kim if (!res) 1569a7550b30SJaegeuk Kim res = res2; 1570a7550b30SJaegeuk Kim return res; 1571a7550b30SJaegeuk Kim } 1572a7550b30SJaegeuk Kim 1573ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1574a7550b30SJaegeuk Kim { 1575ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1576a7550b30SJaegeuk Kim } 1577a7550b30SJaegeuk Kim 1578b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1579b925acb8SEric Biggers { 1580b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1581b925acb8SEric Biggers } 1582b925acb8SEric Biggers 1583b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1584b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1585b925acb8SEric Biggers { 1586b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1587b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1588b925acb8SEric Biggers } 1589b925acb8SEric Biggers 15906f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1591a5d431efSEric Biggers .key_prefix = "ext4:", 1592a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1593a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1594ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1595a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1596b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1597b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1598a7550b30SJaegeuk Kim }; 1599a7550b30SJaegeuk Kim #endif 1600a7550b30SJaegeuk Kim 1601ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1602d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1603689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1604ac27a0ecSDave Kleikamp 1605617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1606617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1607617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1608617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1609617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 16106f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 16118c54ca9cSAl Viro const struct path *path); 1612617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1613ac27a0ecSDave Kleikamp size_t len, loff_t off); 1614617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1615ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16167c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16177c319d32SAditya Kali unsigned int flags); 1618ac27a0ecSDave Kleikamp 161996c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 162096c7e0d9SJan Kara { 162196c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 162296c7e0d9SJan Kara } 162396c7e0d9SJan Kara 162461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 162560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1626617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1627617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1628617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1629617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1630a5b5ee32SJan Kara .write_info = ext4_write_info, 1631a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1632a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1633040cb378SLi Xi .get_projid = ext4_get_projid, 16347a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1635ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1636ac27a0ecSDave Kleikamp }; 1637ac27a0ecSDave Kleikamp 16380d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1639617ba13bSMingming Cao .quota_on = ext4_quota_on, 1640ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1641287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16420a240339SJan Kara .get_state = dquot_get_state, 1643287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1644287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16456332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16466332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1647ac27a0ecSDave Kleikamp }; 1648ac27a0ecSDave Kleikamp #endif 1649ac27a0ecSDave Kleikamp 1650ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1651617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 165294053139SAl Viro .free_inode = ext4_free_in_core_inode, 1653617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1654617ba13bSMingming Cao .write_inode = ext4_write_inode, 1655617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16567ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16570930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1658617ba13bSMingming Cao .put_super = ext4_put_super, 1659617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1660c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1661c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1662617ba13bSMingming Cao .statfs = ext4_statfs, 1663617ba13bSMingming Cao .remount_fs = ext4_remount, 1664617ba13bSMingming Cao .show_options = ext4_show_options, 1665ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1666617ba13bSMingming Cao .quota_read = ext4_quota_read, 1667617ba13bSMingming Cao .quota_write = ext4_quota_write, 166896c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1669ac27a0ecSDave Kleikamp #endif 1670ac27a0ecSDave Kleikamp }; 1671ac27a0ecSDave Kleikamp 167239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16731b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16741b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1675617ba13bSMingming Cao .get_parent = ext4_get_parent, 1676fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1677ac27a0ecSDave Kleikamp }; 1678ac27a0ecSDave Kleikamp 1679ac27a0ecSDave Kleikamp enum { 1680ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1681ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 168272578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1683ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 168472578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1685ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1686ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1687ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16886ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16894f74d15fSEric Biggers Opt_inlinecrypt, 1690ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 16915a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1692ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16939cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 16949cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1695327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1696327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1697670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 16981449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16995328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1700744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1701fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1702cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 170321175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1704e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 17058016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 170699c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 17078016e29fSHarshad Shirwadkar #endif 1708ac27a0ecSDave Kleikamp }; 1709ac27a0ecSDave Kleikamp 1710e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1711e5a185c2SLukas Czerner {"continue", Opt_err_cont}, 1712e5a185c2SLukas Czerner {"panic", Opt_err_panic}, 1713e5a185c2SLukas Czerner {"remount-ro", Opt_err_ro}, 1714e5a185c2SLukas Czerner {} 1715e5a185c2SLukas Czerner }; 1716e5a185c2SLukas Czerner 1717e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1718e5a185c2SLukas Czerner {"journal", Opt_data_journal}, 1719e5a185c2SLukas Czerner {"ordered", Opt_data_ordered}, 1720e5a185c2SLukas Czerner {"writeback", Opt_data_writeback}, 1721e5a185c2SLukas Czerner {} 1722e5a185c2SLukas Czerner }; 1723e5a185c2SLukas Czerner 1724e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1725e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1726e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1727e5a185c2SLukas Czerner {} 1728e5a185c2SLukas Czerner }; 1729e5a185c2SLukas Czerner 1730e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1731e5a185c2SLukas Czerner {"vfsold", Opt_jqfmt_vfsold}, 1732e5a185c2SLukas Czerner {"vfsv0", Opt_jqfmt_vfsv0}, 1733e5a185c2SLukas Czerner {"vfsv1", Opt_jqfmt_vfsv1}, 1734e5a185c2SLukas Czerner {} 1735e5a185c2SLukas Czerner }; 1736e5a185c2SLukas Czerner 1737e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1738e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1739e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1740e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1741e5a185c2SLukas Czerner {} 1742e5a185c2SLukas Czerner }; 1743e5a185c2SLukas Czerner 1744e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1745e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1746e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1747e5a185c2SLukas Czerner 1748e5a185c2SLukas Czerner /* 1749e5a185c2SLukas Czerner * Mount option specification 1750e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1751e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1752e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1753e5a185c2SLukas Czerner * separate for now. 1754e5a185c2SLukas Czerner */ 1755e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1756e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1757e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1758e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1759e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1760e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1761e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1762e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1763e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1764e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1765e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1766e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1767e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1768e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1769e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1770e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1771e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1772e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1773e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1774e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1775e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1776e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1777e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1778e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1779e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1780e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1781e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1782e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1783e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1784e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1785e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1786e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1787e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1788e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1789e5a185c2SLukas Czerner ext4_param_data_err), 1790e5a185c2SLukas Czerner fsparam_string_empty 1791e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1792e5a185c2SLukas Czerner fsparam_string_empty 1793e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1794e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1795e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1796e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1797e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1798e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1799e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1800e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1801e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1802e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1803e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1804e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1805e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1806e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1807e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1808e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1809e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1810e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1811e5a185c2SLukas Czerner fsparam_flag ("lazytime", Opt_lazytime), 1812e5a185c2SLukas Czerner fsparam_flag ("nolazytime", Opt_nolazytime), 1813e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1814e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1815e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1816e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1817e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1818e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1819e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1820e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1821e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1822e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1823e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1824e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1825e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1826e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1827e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1828e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1829e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1830e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1831e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1832e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1833e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1834e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1835e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1836e5a185c2SLukas Czerner #endif 1837e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1838e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1839e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1840e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1841e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1842e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1843e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1844e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1845e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1846e5a185c2SLukas Czerner Opt_removed), 1847e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1848e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1849e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1850e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1851e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1852e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1853e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1854e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1855e5a185c2SLukas Czerner {} 1856e5a185c2SLukas Czerner }; 1857e5a185c2SLukas Czerner 1858a447c093SSteven Whitehouse static const match_table_t tokens = { 1859ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1860ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1861ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1862ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1863ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1864ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1865ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1866ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1867ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1868ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1869ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1870ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1871ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1872ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 187372578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 187472578c33STheodore Ts'o {Opt_removed, "orlov"}, 1875ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1876ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1877ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1878ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1879e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 18805a916be1STheodore Ts'o {Opt_noload, "noload"}, 188172578c33STheodore Ts'o {Opt_removed, "nobh"}, 188272578c33STheodore Ts'o {Opt_removed, "bh"}, 1883ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 188430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 188530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1886ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1887ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1888818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1889c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1890818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1891ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1892ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1893ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1894ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 18955bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 18965bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1897ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1898ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1899ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1900ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1901ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1902ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 19035a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1904ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1905ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1906ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1907ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 190849da9392SJan Kara {Opt_prjquota, "prjquota"}, 1909ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 191006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 191106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 191225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1913923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 19149cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 19159cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 19169cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1917c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 191864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1919327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1920327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1921a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1922a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1923670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1924dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 192536ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 192636ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 19276fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 19286fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1929240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1930b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1931afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 193206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 193306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1934744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1935244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1936744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 19375328e635SEric Sandeen {Opt_discard, "discard"}, 19385328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1939fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1940fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1941fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 19428016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 194399c880deSHarshad Shirwadkar {Opt_fc_debug_force, "fc_debug_force"}, 19448016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"}, 19458016e29fSHarshad Shirwadkar #endif 1946df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1947ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 19486ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 19494f74d15fSEric Biggers {Opt_inlinecrypt, "inlinecrypt"}, 1950cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1951cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 195221175ca4SHarshad Shirwadkar {Opt_removed, "prefetch_block_bitmaps"}, 195321175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, 1954196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, 1955c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1956c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1957c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1958c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1959c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1960f3f12faaSJosef Bacik {Opt_err, NULL}, 1961ac27a0ecSDave Kleikamp }; 1962ac27a0ecSDave Kleikamp 1963617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1964ac27a0ecSDave Kleikamp { 1965617ba13bSMingming Cao ext4_fsblk_t sb_block; 1966ac27a0ecSDave Kleikamp char *options = (char *) *data; 1967ac27a0ecSDave Kleikamp 1968ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1969ac27a0ecSDave Kleikamp return 1; /* Default location */ 19700b8e58a1SAndreas Dilger 1971ac27a0ecSDave Kleikamp options += 3; 19720b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1973ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1974ac27a0ecSDave Kleikamp if (*options && *options != ',') { 19754776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1976ac27a0ecSDave Kleikamp (char *) *data); 1977ac27a0ecSDave Kleikamp return 1; 1978ac27a0ecSDave Kleikamp } 1979ac27a0ecSDave Kleikamp if (*options == ',') 1980ac27a0ecSDave Kleikamp options++; 1981ac27a0ecSDave Kleikamp *data = (void *) options; 19820b8e58a1SAndreas Dilger 1983ac27a0ecSDave Kleikamp return sb_block; 1984ac27a0ecSDave Kleikamp } 1985ac27a0ecSDave Kleikamp 1986b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1987196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1988196e402aSHarshad Shirwadkar 1989d6006186SEric Biggers static const char deprecated_msg[] = 1990d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1991437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1992b3881f74STheodore Ts'o 199326092bf5STheodore Ts'o #define MOPT_SET 0x0001 199426092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 199526092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 199626092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 199726092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 199826092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 199926092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 200026092bf5STheodore Ts'o #define MOPT_Q 0 200126092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 200226092bf5STheodore Ts'o #else 200326092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 200426092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 200526092bf5STheodore Ts'o #endif 200626092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 20078dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 20088dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 20098dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 2010ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 20119cb20f94SIra Weiny #define MOPT_SKIP 0x0800 2012995a3ed6SHarshad Shirwadkar #define MOPT_2 0x1000 201326092bf5STheodore Ts'o 201426092bf5STheodore Ts'o static const struct mount_opts { 201526092bf5STheodore Ts'o int token; 201626092bf5STheodore Ts'o int mount_opt; 201726092bf5STheodore Ts'o int flags; 201826092bf5STheodore Ts'o } ext4_mount_opts[] = { 201926092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 202026092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 202126092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 202226092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 202326092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 202426092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 20258dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 20268dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 20278dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 20288dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 202926092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 203026092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 20318dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 20328dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20338dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 203459d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 2035327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 2036327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 2037c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 2038c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 20398dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 20401e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 204126092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 20428dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 20431e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20448dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 204526092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 204626092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 204726092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 20488dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 20497915a861SAles Novak MOPT_NO_EXT2}, 20508dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 20517915a861SAles Novak MOPT_NO_EXT2}, 205226092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 205326092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 205426092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 205526092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 205626092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 205726092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 205826092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 205926092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 206026092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 206126092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 20629cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 20639cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 20649cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 20659cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 20669cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 20679cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 20689cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 206926092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 20700efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 20710efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 20725ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 20735ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 20745ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 20758dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 20768dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 20778dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 20788dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 207926092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 208026092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 208126092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 208226092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 208326092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 208426092bf5STheodore Ts'o #else 208526092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 208626092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 208726092bf5STheodore Ts'o #endif 208826092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 208926092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 2090670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 209126092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 209226092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 209326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 209426092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 209526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 209649da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 209749da9392SJan Kara MOPT_SET | MOPT_Q}, 209826092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 209949da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 210049da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 2101174fe5baSKaixu Xia {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING}, 2102174fe5baSKaixu Xia {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING}, 210326092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 210426092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 210526092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 210626092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 210726092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 2108df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 2109ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 2110cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 211121175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 21123d392b26STheodore Ts'o MOPT_SET}, 2113196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, 211499c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 21150f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 21160f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 21178016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, 0, MOPT_GTE0}, 21188016e29fSHarshad Shirwadkar #endif 211926092bf5STheodore Ts'o {Opt_err, 0, 0} 212026092bf5STheodore Ts'o }; 212126092bf5STheodore Ts'o 2122c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 2123c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 2124c83ad55eSGabriel Krisman Bertazi __u16 magic; 2125c83ad55eSGabriel Krisman Bertazi char *name; 2126c83ad55eSGabriel Krisman Bertazi char *version; 2127c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 2128c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 2129c83ad55eSGabriel Krisman Bertazi }; 2130c83ad55eSGabriel Krisman Bertazi 2131c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 2132c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 2133c83ad55eSGabriel Krisman Bertazi __u16 *flags) 2134c83ad55eSGabriel Krisman Bertazi { 2135c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 2136c83ad55eSGabriel Krisman Bertazi int i; 2137c83ad55eSGabriel Krisman Bertazi 2138c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 2139c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 2140c83ad55eSGabriel Krisman Bertazi break; 2141c83ad55eSGabriel Krisman Bertazi 2142c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 2143c83ad55eSGabriel Krisman Bertazi return -EINVAL; 2144c83ad55eSGabriel Krisman Bertazi 2145c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 2146c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 2147c83ad55eSGabriel Krisman Bertazi 2148c83ad55eSGabriel Krisman Bertazi return 0; 2149c83ad55eSGabriel Krisman Bertazi } 2150c83ad55eSGabriel Krisman Bertazi #endif 2151c83ad55eSGabriel Krisman Bertazi 2152ed318a6cSEric Biggers static int ext4_set_test_dummy_encryption(struct super_block *sb, 2153461c3af0SLukas Czerner struct fs_parameter *param, 2154ed318a6cSEric Biggers bool is_remount) 2155ed318a6cSEric Biggers { 2156ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 2157ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 2158ed318a6cSEric Biggers int err; 2159ed318a6cSEric Biggers 2160ed318a6cSEric Biggers /* 2161ed318a6cSEric Biggers * This mount option is just for testing, and it's not worthwhile to 2162ed318a6cSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 2163ed318a6cSEric Biggers * needed to allow it to be set or changed during remount. We do allow 2164ed318a6cSEric Biggers * it to be specified during remount, but only if there is no change. 2165ed318a6cSEric Biggers */ 2166ac4acb1fSEric Biggers if (is_remount && !sbi->s_dummy_enc_policy.policy) { 2167ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2168ed318a6cSEric Biggers "Can't set test_dummy_encryption on remount"); 2169ed318a6cSEric Biggers return -1; 2170ed318a6cSEric Biggers } 2171461c3af0SLukas Czerner err = fscrypt_set_test_dummy_encryption(sb, param->string, 2172ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2173ed318a6cSEric Biggers if (err) { 2174ed318a6cSEric Biggers if (err == -EEXIST) 2175ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2176ed318a6cSEric Biggers "Can't change test_dummy_encryption on remount"); 2177ed318a6cSEric Biggers else if (err == -EINVAL) 2178ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2179461c3af0SLukas Czerner "Value of option \"%s\" is unrecognized", 2180461c3af0SLukas Czerner param->key); 2181ed318a6cSEric Biggers else 2182ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2183ed318a6cSEric Biggers "Error processing option \"%s\" [%d]", 2184461c3af0SLukas Czerner param->key, err); 2185ed318a6cSEric Biggers return -1; 2186ed318a6cSEric Biggers } 2187ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2188ed318a6cSEric Biggers #else 2189ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2190ed318a6cSEric Biggers "Test dummy encryption mount option ignored"); 2191ed318a6cSEric Biggers #endif 2192ed318a6cSEric Biggers return 1; 2193ed318a6cSEric Biggers } 2194ed318a6cSEric Biggers 2195461c3af0SLukas Czerner struct ext4_fs_context { 2196*e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 2197*e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 2198*e6e268cbSLukas Czerner unsigned short qname_spec; 2199b237e304SHarshad Shirwadkar unsigned long journal_devnum; 2200b237e304SHarshad Shirwadkar unsigned int journal_ioprio; 2201196e402aSHarshad Shirwadkar int mb_optimize_scan; 2202b237e304SHarshad Shirwadkar }; 2203b237e304SHarshad Shirwadkar 2204*e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2205*e6e268cbSLukas Czerner /* 2206*e6e268cbSLukas Czerner * Note the name of the specified quota file. 2207*e6e268cbSLukas Czerner */ 2208*e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2209*e6e268cbSLukas Czerner struct fs_parameter *param) 2210*e6e268cbSLukas Czerner { 2211*e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2212*e6e268cbSLukas Czerner char *qname; 2213*e6e268cbSLukas Czerner 2214*e6e268cbSLukas Czerner if (param->size < 1) { 2215*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2216*e6e268cbSLukas Czerner return -EINVAL; 2217*e6e268cbSLukas Czerner } 2218*e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2219*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2220*e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2221*e6e268cbSLukas Czerner return -EINVAL; 2222*e6e268cbSLukas Czerner } 2223*e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2224*e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2225*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2226*e6e268cbSLukas Czerner "%s quota file already specified", 2227*e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2228*e6e268cbSLukas Czerner return -EINVAL; 2229*e6e268cbSLukas Czerner } 2230*e6e268cbSLukas Czerner return 0; 2231*e6e268cbSLukas Czerner } 2232*e6e268cbSLukas Czerner 2233*e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2234*e6e268cbSLukas Czerner if (!qname) { 2235*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2236*e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2237*e6e268cbSLukas Czerner return -ENOMEM; 2238*e6e268cbSLukas Czerner } 2239*e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2240*e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 2241*e6e268cbSLukas Czerner return 0; 2242*e6e268cbSLukas Czerner } 2243*e6e268cbSLukas Czerner 2244*e6e268cbSLukas Czerner /* 2245*e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2246*e6e268cbSLukas Czerner */ 2247*e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2248*e6e268cbSLukas Czerner { 2249*e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2250*e6e268cbSLukas Czerner 2251*e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2252*e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2253*e6e268cbSLukas Czerner 2254*e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2255*e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 2256*e6e268cbSLukas Czerner return 0; 2257*e6e268cbSLukas Czerner } 2258*e6e268cbSLukas Czerner #endif 2259*e6e268cbSLukas Czerner 2260461c3af0SLukas Czerner static int handle_mount_opt(struct fs_context *fc, struct fs_parameter *param) 226126092bf5STheodore Ts'o { 2262461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2263461c3af0SLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 2264461c3af0SLukas Czerner struct super_block *sb = sbi->s_sb; 2265461c3af0SLukas Czerner struct fs_parse_result result; 226626092bf5STheodore Ts'o const struct mount_opts *m; 2267461c3af0SLukas Czerner int is_remount; 226808cefc7aSEric W. Biederman kuid_t uid; 226908cefc7aSEric W. Biederman kgid_t gid; 2270461c3af0SLukas Czerner int token; 2271461c3af0SLukas Czerner 2272461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2273461c3af0SLukas Czerner if (token < 0) 2274461c3af0SLukas Czerner return token; 2275461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 227626092bf5STheodore Ts'o 227757f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2278461c3af0SLukas Czerner if (token == Opt_usrjquota) { 2279461c3af0SLukas Czerner if (!*param->string) 2280*e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2281461c3af0SLukas Czerner else 2282*e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2283461c3af0SLukas Czerner } else if (token == Opt_grpjquota) { 2284461c3af0SLukas Czerner if (!*param->string) 2285*e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2286461c3af0SLukas Czerner else 2287*e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 2288461c3af0SLukas Czerner } 228957f73c2cSTheodore Ts'o #endif 229026092bf5STheodore Ts'o switch (token) { 2291f7048605STheodore Ts'o case Opt_noacl: 2292f7048605STheodore Ts'o case Opt_nouser_xattr: 2293da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "3.5"); 2294f7048605STheodore Ts'o break; 229526092bf5STheodore Ts'o case Opt_sb: 229626092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 229726092bf5STheodore Ts'o case Opt_removed: 2298da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2299461c3af0SLukas Czerner param->key); 230026092bf5STheodore Ts'o return 1; 230126092bf5STheodore Ts'o case Opt_abort: 23029b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 230326092bf5STheodore Ts'o return 1; 230426092bf5STheodore Ts'o case Opt_i_version: 2305357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 230626092bf5STheodore Ts'o return 1; 2307a26f4992STheodore Ts'o case Opt_lazytime: 23081751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 2309a26f4992STheodore Ts'o return 1; 2310a26f4992STheodore Ts'o case Opt_nolazytime: 23111751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 2312a26f4992STheodore Ts'o return 1; 23134f74d15fSEric Biggers case Opt_inlinecrypt: 23144f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 23154f74d15fSEric Biggers sb->s_flags |= SB_INLINECRYPT; 23164f74d15fSEric Biggers #else 2317da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 23184f74d15fSEric Biggers #endif 23194f74d15fSEric Biggers return 1; 2320461c3af0SLukas Czerner case Opt_errors: 2321461c3af0SLukas Czerner case Opt_data: 2322461c3af0SLukas Czerner case Opt_data_err: 2323461c3af0SLukas Czerner case Opt_jqfmt: 2324461c3af0SLukas Czerner case Opt_dax_type: 2325461c3af0SLukas Czerner token = result.uint_32; 232626092bf5STheodore Ts'o } 232726092bf5STheodore Ts'o 23285f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 23295f3633e3SJan Kara if (token == m->token) 23305f3633e3SJan Kara break; 23315f3633e3SJan Kara 23325f3633e3SJan Kara if (m->token == Opt_err) { 2333da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Unrecognized mount option \"%s\" " 2334461c3af0SLukas Czerner "or missing value", param->key); 2335da812f61SLukas Czerner return -EINVAL; 23365f3633e3SJan Kara } 23375f3633e3SJan Kara 23388dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2339da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2340461c3af0SLukas Czerner "Mount option \"%s\" incompatible with ext2", 2341461c3af0SLukas Czerner param->key); 2342da812f61SLukas Czerner return -EINVAL; 23438dc0aa8cSTheodore Ts'o } 23448dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2345da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2346461c3af0SLukas Czerner "Mount option \"%s\" incompatible with ext3", 2347461c3af0SLukas Czerner param->key); 2348da812f61SLukas Czerner return -EINVAL; 23498dc0aa8cSTheodore Ts'o } 23508dc0aa8cSTheodore Ts'o 2351c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 2352c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 235326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 23541e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 23551e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 2356c93cf2d7SDmitry Monakhov } else 2357da812f61SLukas Czerner return -EINVAL; 2358c93cf2d7SDmitry Monakhov } 235926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 236026092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 236126092bf5STheodore Ts'o 236226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 2363da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2364461c3af0SLukas Czerner param->key); 236526092bf5STheodore Ts'o } else if (token == Opt_commit) { 2366461c3af0SLukas Czerner if (result.uint_32 == 0) 2367461c3af0SLukas Czerner sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2368461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2369da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 23709ba55543Szhangyi (F) "Invalid commit interval %d, " 23719ba55543Szhangyi (F) "must be smaller than %d", 2372461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2373da812f61SLukas Czerner return -EINVAL; 23749ba55543Szhangyi (F) } 2375461c3af0SLukas Czerner sbi->s_commit_interval = HZ * result.uint_32; 2376670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 2377461c3af0SLukas Czerner if ((result.uint_32 & 1) || 2378461c3af0SLukas Czerner (result.uint_32 < 4) || 2379461c3af0SLukas Czerner (result.uint_32 > 2380461c3af0SLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { 2381da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2382461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2383da812f61SLukas Czerner return -EINVAL; 23849803387cSTheodore Ts'o } 2385461c3af0SLukas Czerner sbi->s_want_extra_isize = result.uint_32; 238626092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 2387461c3af0SLukas Czerner sbi->s_max_batch_time = result.uint_32; 238826092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 2389461c3af0SLukas Czerner sbi->s_min_batch_time = result.uint_32; 239026092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2391461c3af0SLukas Czerner if (result.uint_32 && 2392461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2393461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2394da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2395e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2396e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2397da812f61SLukas Czerner return -EINVAL; 239826092bf5STheodore Ts'o } 2399461c3af0SLukas Czerner sbi->s_inode_readahead_blks = result.uint_32; 240026092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 240126092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 2402461c3af0SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2403461c3af0SLukas Czerner if (param->type == fs_value_is_string) 2404461c3af0SLukas Czerner sbi->s_li_wait_mult = result.uint_32; 2405df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 2406461c3af0SLukas Czerner sbi->s_max_dir_size_kb = result.uint_32; 24078016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 24088016e29fSHarshad Shirwadkar } else if (token == Opt_fc_debug_max_replay) { 2409461c3af0SLukas Czerner sbi->s_fc_debug_max_replay = result.uint_32; 24108016e29fSHarshad Shirwadkar #endif 241126092bf5STheodore Ts'o } else if (token == Opt_stripe) { 2412461c3af0SLukas Czerner sbi->s_stripe = result.uint_32; 24130efb3b23SJan Kara } else if (token == Opt_resuid) { 2414461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 24150efb3b23SJan Kara if (!uid_valid(uid)) { 2416da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2417461c3af0SLukas Czerner result.uint_32); 2418da812f61SLukas Czerner return -EINVAL; 24190efb3b23SJan Kara } 24200efb3b23SJan Kara sbi->s_resuid = uid; 24210efb3b23SJan Kara } else if (token == Opt_resgid) { 2422461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 24230efb3b23SJan Kara if (!gid_valid(gid)) { 2424da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2425461c3af0SLukas Czerner result.uint_32); 2426da812f61SLukas Czerner return -EINVAL; 24270efb3b23SJan Kara } 24280efb3b23SJan Kara sbi->s_resgid = gid; 24290efb3b23SJan Kara } else if (token == Opt_journal_dev) { 24300efb3b23SJan Kara if (is_remount) { 2431da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 24320efb3b23SJan Kara "Cannot specify journal on remount"); 2433da812f61SLukas Czerner return -EINVAL; 24340efb3b23SJan Kara } 2435461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 2436ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2437ad4eec61SEric Sandeen struct inode *journal_inode; 2438ad4eec61SEric Sandeen struct path path; 2439ad4eec61SEric Sandeen int error; 2440ad4eec61SEric Sandeen 2441ad4eec61SEric Sandeen if (is_remount) { 2442da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2443ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2444da812f61SLukas Czerner return -EINVAL; 2445ad4eec61SEric Sandeen } 2446ad4eec61SEric Sandeen 2447461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2448ad4eec61SEric Sandeen if (error) { 2449da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2450461c3af0SLukas Czerner "journal device path"); 2451da812f61SLukas Czerner return -EINVAL; 2452ad4eec61SEric Sandeen } 2453ad4eec61SEric Sandeen 24542b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2455461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 2456ad4eec61SEric Sandeen path_put(&path); 24570efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 2458461c3af0SLukas Czerner if (result.uint_32 > 7) { 2459da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 24600efb3b23SJan Kara " (must be 0-7)"); 2461da812f61SLukas Czerner return -EINVAL; 24620efb3b23SJan Kara } 2463461c3af0SLukas Czerner ctx->journal_ioprio = 2464461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 24656ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 2466461c3af0SLukas Czerner return ext4_set_test_dummy_encryption(sb, param, is_remount); 246726092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 246826092bf5STheodore Ts'o if (is_remount) { 246926092bf5STheodore Ts'o if (!sbi->s_journal) 2470da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 24715f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 2472da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 247326092bf5STheodore Ts'o "Cannot change data mode on remount"); 2474da812f61SLukas Czerner return -EINVAL; 247526092bf5STheodore Ts'o } 247626092bf5STheodore Ts'o } else { 247726092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 247826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 247926092bf5STheodore Ts'o } 248026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 248126092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 2482*e6e268cbSLukas Czerner ctx->s_jquota_fmt = m->mount_opt; 248326092bf5STheodore Ts'o #endif 24849cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 24859cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2486ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 24879cb20f94SIra Weiny switch (token) { 24889cb20f94SIra Weiny case Opt_dax: 24899cb20f94SIra Weiny case Opt_dax_always: 2490829b37b8STheodore Ts'o if (is_remount && 2491829b37b8STheodore Ts'o (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2492829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 2493829b37b8STheodore Ts'o fail_dax_change_remount: 2494da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 2495829b37b8STheodore Ts'o "dax mount option while remounting"); 2496da812f61SLukas Czerner return -EINVAL; 2497829b37b8STheodore Ts'o } 2498829b37b8STheodore Ts'o if (is_remount && 2499829b37b8STheodore Ts'o (test_opt(sb, DATA_FLAGS) == 2500829b37b8STheodore Ts'o EXT4_MOUNT_JOURNAL_DATA)) { 2501da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 2502829b37b8STheodore Ts'o "both data=journal and dax"); 2503da812f61SLukas Czerner return -EINVAL; 2504829b37b8STheodore Ts'o } 2505da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2506ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 25079cb20f94SIra Weiny sbi->s_mount_opt |= EXT4_MOUNT_DAX_ALWAYS; 25089cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 25099cb20f94SIra Weiny break; 25109cb20f94SIra Weiny case Opt_dax_never: 2511829b37b8STheodore Ts'o if (is_remount && 2512829b37b8STheodore Ts'o (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2513829b37b8STheodore Ts'o (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) 2514829b37b8STheodore Ts'o goto fail_dax_change_remount; 25159cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 25169cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 25179cb20f94SIra Weiny break; 25189cb20f94SIra Weiny case Opt_dax_inode: 2519829b37b8STheodore Ts'o if (is_remount && 2520829b37b8STheodore Ts'o ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2521829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2522829b37b8STheodore Ts'o !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) 2523829b37b8STheodore Ts'o goto fail_dax_change_remount; 25249cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 25259cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 25269cb20f94SIra Weiny /* Strictly for printing options */ 25279cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_INODE; 25289cb20f94SIra Weiny break; 25299cb20f94SIra Weiny } 2530ef83b6e8SDan Williams #else 2531da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 25329cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 25339cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 2534da812f61SLukas Czerner return -EINVAL; 2535923ae0ffSRoss Zwisler #endif 25367915a861SAles Novak } else if (token == Opt_data_err_abort) { 25377915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 25387915a861SAles Novak } else if (token == Opt_data_err_ignore) { 25397915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 2540196e402aSHarshad Shirwadkar } else if (token == Opt_mb_optimize_scan) { 2541461c3af0SLukas Czerner if (result.int_32 != 0 && result.int_32 != 1) { 2542da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2543196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2544da812f61SLukas Czerner return -EINVAL; 2545196e402aSHarshad Shirwadkar } 2546461c3af0SLukas Czerner ctx->mb_optimize_scan = result.int_32; 254726092bf5STheodore Ts'o } else { 2548461c3af0SLukas Czerner unsigned int set = 0; 2549461c3af0SLukas Czerner 2550461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2551461c3af0SLukas Czerner result.uint_32 > 0) 2552461c3af0SLukas Czerner set = 1; 2553461c3af0SLukas Czerner 255426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2555461c3af0SLukas Czerner set = !set; 255626092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2557da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2558461c3af0SLukas Czerner "buggy handling of option %s", 2559461c3af0SLukas Czerner param->key); 256026092bf5STheodore Ts'o WARN_ON(1); 2561da812f61SLukas Czerner return -EINVAL; 256226092bf5STheodore Ts'o } 2563995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2564461c3af0SLukas Czerner if (set != 0) 2565995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 |= m->mount_opt; 2566995a3ed6SHarshad Shirwadkar else 2567995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 &= ~m->mount_opt; 2568995a3ed6SHarshad Shirwadkar } else { 2569461c3af0SLukas Czerner if (set != 0) 257026092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 257126092bf5STheodore Ts'o else 257226092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 257326092bf5STheodore Ts'o } 2574995a3ed6SHarshad Shirwadkar } 257526092bf5STheodore Ts'o return 1; 257626092bf5STheodore Ts'o } 257726092bf5STheodore Ts'o 2578ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 2579*e6e268cbSLukas Czerner struct ext4_fs_context *ctx, 2580661aa520SEric Sandeen int is_remount) 2581ac27a0ecSDave Kleikamp { 2582461c3af0SLukas Czerner struct fs_parameter param; 2583461c3af0SLukas Czerner struct fs_context fc; 2584461c3af0SLukas Czerner int ret; 2585461c3af0SLukas Czerner char *key; 2586ac27a0ecSDave Kleikamp 2587ac27a0ecSDave Kleikamp if (!options) 2588ac27a0ecSDave Kleikamp return 1; 2589ac27a0ecSDave Kleikamp 2590461c3af0SLukas Czerner memset(&fc, 0, sizeof(fc)); 2591*e6e268cbSLukas Czerner fc.fs_private = ctx; 2592461c3af0SLukas Czerner fc.s_fs_info = EXT4_SB(sb); 2593461c3af0SLukas Czerner 2594461c3af0SLukas Czerner if (is_remount) 2595461c3af0SLukas Czerner fc.purpose = FS_CONTEXT_FOR_RECONFIGURE; 2596461c3af0SLukas Czerner 2597461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2598461c3af0SLukas Czerner if (*key) { 2599461c3af0SLukas Czerner size_t v_len = 0; 2600461c3af0SLukas Czerner char *value = strchr(key, '='); 2601461c3af0SLukas Czerner 2602461c3af0SLukas Czerner param.type = fs_value_is_flag; 2603461c3af0SLukas Czerner param.string = NULL; 2604461c3af0SLukas Czerner 2605461c3af0SLukas Czerner if (value) { 2606461c3af0SLukas Czerner if (value == key) 2607ac27a0ecSDave Kleikamp continue; 2608461c3af0SLukas Czerner 2609461c3af0SLukas Czerner *value++ = 0; 2610461c3af0SLukas Czerner v_len = strlen(value); 2611461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2612461c3af0SLukas Czerner GFP_KERNEL); 2613461c3af0SLukas Czerner if (!param.string) 2614461c3af0SLukas Czerner return 0; 2615461c3af0SLukas Czerner param.type = fs_value_is_string; 2616461c3af0SLukas Czerner } 2617461c3af0SLukas Czerner 2618461c3af0SLukas Czerner param.key = key; 2619461c3af0SLukas Czerner param.size = v_len; 2620461c3af0SLukas Czerner 2621461c3af0SLukas Czerner ret = handle_mount_opt(&fc, ¶m); 2622461c3af0SLukas Czerner if (param.string) 2623461c3af0SLukas Czerner kfree(param.string); 2624461c3af0SLukas Czerner if (ret < 0) 2625ac27a0ecSDave Kleikamp return 0; 2626ac27a0ecSDave Kleikamp } 2627461c3af0SLukas Czerner } 2628461c3af0SLukas Czerner 2629da812f61SLukas Czerner ret = ext4_validate_options(&fc); 2630da812f61SLukas Czerner if (ret < 0) 2631da812f61SLukas Czerner return 0; 2632da812f61SLukas Czerner 2633*e6e268cbSLukas Czerner ret = ext4_check_quota_consistency(&fc, sb); 2634*e6e268cbSLukas Czerner if (ret < 0) 2635*e6e268cbSLukas Czerner return 0; 2636*e6e268cbSLukas Czerner 2637*e6e268cbSLukas Czerner if (ctx->qname_spec) 2638*e6e268cbSLukas Czerner ext4_apply_quota_options(&fc, sb); 2639*e6e268cbSLukas Czerner 2640da812f61SLukas Czerner return 1; 26414c94bff9SLukas Czerner } 26424c94bff9SLukas Czerner 2643*e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2644*e6e268cbSLukas Czerner struct super_block *sb) 2645*e6e268cbSLukas Czerner { 2646*e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2647*e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2648*e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2649*e6e268cbSLukas Czerner char *qname; 2650*e6e268cbSLukas Czerner int i; 2651*e6e268cbSLukas Czerner 2652*e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2653*e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2654*e6e268cbSLukas Czerner continue; 2655*e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 2656*e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 2657*e6e268cbSLukas Czerner kfree(sbi->s_qf_names[i]); 2658*e6e268cbSLukas Czerner rcu_assign_pointer(sbi->s_qf_names[i], qname); 2659*e6e268cbSLukas Czerner set_opt(sb, QUOTA); 2660*e6e268cbSLukas Czerner } 2661*e6e268cbSLukas Czerner #endif 2662*e6e268cbSLukas Czerner } 2663*e6e268cbSLukas Czerner 2664*e6e268cbSLukas Czerner /* 2665*e6e268cbSLukas Czerner * Check quota settings consistency. 2666*e6e268cbSLukas Czerner */ 2667*e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2668*e6e268cbSLukas Czerner struct super_block *sb) 2669*e6e268cbSLukas Czerner { 2670*e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2671*e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2672*e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2673*e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2674*e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 2675*e6e268cbSLukas Czerner int i; 2676*e6e268cbSLukas Czerner 2677*e6e268cbSLukas Czerner if (ctx->qname_spec && quota_loaded) { 2678*e6e268cbSLukas Czerner if (quota_feature) 2679*e6e268cbSLukas Czerner goto err_feature; 2680*e6e268cbSLukas Czerner 2681*e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2682*e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2683*e6e268cbSLukas Czerner continue; 2684*e6e268cbSLukas Czerner 2685*e6e268cbSLukas Czerner if (!!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2686*e6e268cbSLukas Czerner goto err_jquota_change; 2687*e6e268cbSLukas Czerner 2688*e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 2689*e6e268cbSLukas Czerner strcmp(sbi->s_qf_names[i], 2690*e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2691*e6e268cbSLukas Czerner goto err_jquota_specified; 2692*e6e268cbSLukas Czerner } 2693*e6e268cbSLukas Czerner } 2694*e6e268cbSLukas Czerner 2695*e6e268cbSLukas Czerner if (ctx->s_jquota_fmt) { 2696*e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 2697*e6e268cbSLukas Czerner goto err_quota_change; 2698*e6e268cbSLukas Czerner if (quota_feature) { 2699*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2700*e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2701*e6e268cbSLukas Czerner return 0; 2702*e6e268cbSLukas Czerner } 2703*e6e268cbSLukas Czerner } 2704*e6e268cbSLukas Czerner return 0; 2705*e6e268cbSLukas Czerner 2706*e6e268cbSLukas Czerner err_quota_change: 2707*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2708*e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2709*e6e268cbSLukas Czerner return -EINVAL; 2710*e6e268cbSLukas Czerner err_jquota_change: 2711*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2712*e6e268cbSLukas Czerner "options when quota turned on"); 2713*e6e268cbSLukas Czerner return -EINVAL; 2714*e6e268cbSLukas Czerner err_jquota_specified: 2715*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2716*e6e268cbSLukas Czerner QTYPE2NAME(i)); 2717*e6e268cbSLukas Czerner return -EINVAL; 2718*e6e268cbSLukas Czerner err_feature: 2719*e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Journaled quota options ignored " 2720*e6e268cbSLukas Czerner "when QUOTA feature is enabled"); 2721*e6e268cbSLukas Czerner return 0; 2722*e6e268cbSLukas Czerner #else 2723*e6e268cbSLukas Czerner return 0; 2724*e6e268cbSLukas Czerner #endif 2725*e6e268cbSLukas Czerner } 2726*e6e268cbSLukas Czerner 2727da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 27284c94bff9SLukas Czerner { 2729da812f61SLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 2730da812f61SLukas Czerner struct super_block *sb = sbi->s_sb; 2731ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 27324c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 273349da9392SJan Kara /* 273449da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 273549da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 273649da9392SJan Kara * to support legacy quotas in quota files. 273749da9392SJan Kara */ 273849da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 2739da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 274049da9392SJan Kara "Cannot enable project quota enforcement."); 2741da812f61SLukas Czerner return -EINVAL; 274249da9392SJan Kara } 274333458eabSTheodore Ts'o usr_qf_name = get_qf_name(sb, sbi, USRQUOTA); 274433458eabSTheodore Ts'o grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA); 274533458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 274633458eabSTheodore Ts'o if (test_opt(sb, USRQUOTA) && usr_qf_name) 2747fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 2748ac27a0ecSDave Kleikamp 274933458eabSTheodore Ts'o if (test_opt(sb, GRPQUOTA) && grp_qf_name) 2750fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2751ac27a0ecSDave Kleikamp 275256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2753da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2754b31e1552SEric Sandeen "format mixing"); 2755da812f61SLukas Czerner return -EINVAL; 2756ac27a0ecSDave Kleikamp } 2757ac27a0ecSDave Kleikamp 2758ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2759da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 2760b31e1552SEric Sandeen "not specified"); 2761da812f61SLukas Czerner return -EINVAL; 2762ac27a0ecSDave Kleikamp } 2763ac27a0ecSDave Kleikamp } 2764ac27a0ecSDave Kleikamp #endif 2765626b035bSRitesh Harjani if (test_opt(sb, DIOREAD_NOLOCK)) { 2766626b035bSRitesh Harjani int blocksize = 2767626b035bSRitesh Harjani BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2768626b035bSRitesh Harjani if (blocksize < PAGE_SIZE) 2769da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2770da812f61SLukas Czerner "Warning: mounting with an experimental " 2771da812f61SLukas Czerner "option 'dioread_nolock' for " 2772da812f61SLukas Czerner "blocksize < PAGE_SIZE"); 2773626b035bSRitesh Harjani } 2774da812f61SLukas Czerner return 0; 2775ac27a0ecSDave Kleikamp } 2776ac27a0ecSDave Kleikamp 27772adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 27782adf6da8STheodore Ts'o struct super_block *sb) 27792adf6da8STheodore Ts'o { 27802adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 27812adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 278233458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 27832adf6da8STheodore Ts'o 27842adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 27852adf6da8STheodore Ts'o char *fmtname = ""; 27862adf6da8STheodore Ts'o 27872adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 27882adf6da8STheodore Ts'o case QFMT_VFS_OLD: 27892adf6da8STheodore Ts'o fmtname = "vfsold"; 27902adf6da8STheodore Ts'o break; 27912adf6da8STheodore Ts'o case QFMT_VFS_V0: 27922adf6da8STheodore Ts'o fmtname = "vfsv0"; 27932adf6da8STheodore Ts'o break; 27942adf6da8STheodore Ts'o case QFMT_VFS_V1: 27952adf6da8STheodore Ts'o fmtname = "vfsv1"; 27962adf6da8STheodore Ts'o break; 27972adf6da8STheodore Ts'o } 27982adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 27992adf6da8STheodore Ts'o } 28002adf6da8STheodore Ts'o 280133458eabSTheodore Ts'o rcu_read_lock(); 280233458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 280333458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 280433458eabSTheodore Ts'o if (usr_qf_name) 280533458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 280633458eabSTheodore Ts'o if (grp_qf_name) 280733458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 280833458eabSTheodore Ts'o rcu_read_unlock(); 28092adf6da8STheodore Ts'o #endif 28102adf6da8STheodore Ts'o } 28112adf6da8STheodore Ts'o 28125a916be1STheodore Ts'o static const char *token2str(int token) 28135a916be1STheodore Ts'o { 281450df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 28155a916be1STheodore Ts'o 28165a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 28175a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 28185a916be1STheodore Ts'o break; 28195a916be1STheodore Ts'o return t->pattern; 28205a916be1STheodore Ts'o } 28215a916be1STheodore Ts'o 28222adf6da8STheodore Ts'o /* 28232adf6da8STheodore Ts'o * Show an option if 28242adf6da8STheodore Ts'o * - it's set to a non-default value OR 28252adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 28262adf6da8STheodore Ts'o */ 282766acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 282866acdcf4STheodore Ts'o int nodefs) 28292adf6da8STheodore Ts'o { 28302adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 28312adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 283268afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 28335a916be1STheodore Ts'o const struct mount_opts *m; 283466acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 28352adf6da8STheodore Ts'o 283666acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 283766acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 28382adf6da8STheodore Ts'o 28392adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 28405a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 28415a916be1STheodore Ts'o 28425a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 28435a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 28445a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 28459cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 28465a916be1STheodore Ts'o continue; 284768afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 28485a916be1STheodore Ts'o continue; /* skip if same as the default */ 28495a916be1STheodore Ts'o if ((want_set && 28505a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 28515a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 28525a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 28535a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 28545a916be1STheodore Ts'o } 28555a916be1STheodore Ts'o 285608cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 28575a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 285808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 285908cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 286008cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 28615a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 286208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 286308cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 286466acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 28655a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 28665a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 28672adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 28685a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 28692adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 28705a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 287166acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 28725a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 287366acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 28745a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 287566acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 28765a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2877357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 28785a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 287966acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 28805a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 288168afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 288268afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 28832adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 28845a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 28852adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 28865a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 28872adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 28885a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 28895a916be1STheodore Ts'o } 289066acdcf4STheodore Ts'o if (nodefs || 289166acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 28925a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 28932adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 28942adf6da8STheodore Ts'o 2895ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 289666acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 28975a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2898df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2899df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 29007915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 29017915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2902ed318a6cSEric Biggers 2903ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 29042adf6da8STheodore Ts'o 29054f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 29064f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 29074f74d15fSEric Biggers 29089cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 29099cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 29109cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 29119cb20f94SIra Weiny else 29129cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 29139cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 29149cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 29159cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 29169cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 29179cb20f94SIra Weiny } 29182adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 29192adf6da8STheodore Ts'o return 0; 29202adf6da8STheodore Ts'o } 29212adf6da8STheodore Ts'o 292266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 292366acdcf4STheodore Ts'o { 292466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 292566acdcf4STheodore Ts'o } 292666acdcf4STheodore Ts'o 2927ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 292866acdcf4STheodore Ts'o { 292966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 293066acdcf4STheodore Ts'o int rc; 293166acdcf4STheodore Ts'o 2932bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 293366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 293466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 293566acdcf4STheodore Ts'o return rc; 293666acdcf4STheodore Ts'o } 293766acdcf4STheodore Ts'o 2938617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2939ac27a0ecSDave Kleikamp int read_only) 2940ac27a0ecSDave Kleikamp { 2941617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2942c89128a0SJaegeuk Kim int err = 0; 2943ac27a0ecSDave Kleikamp 2944617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2945b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2946b31e1552SEric Sandeen "forcing read-only mode"); 2947c89128a0SJaegeuk Kim err = -EROFS; 29485adaccacSyangerkun goto done; 2949ac27a0ecSDave Kleikamp } 2950ac27a0ecSDave Kleikamp if (read_only) 2951281b5995STheodore Ts'o goto done; 2952617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2953b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2954b31e1552SEric Sandeen "running e2fsck is recommended"); 2955c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2956b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2957b31e1552SEric Sandeen "warning: mounting fs with errors, " 2958b31e1552SEric Sandeen "running e2fsck is recommended"); 2959ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2960ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2961ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2962b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2963b31e1552SEric Sandeen "warning: maximal mount count reached, " 2964b31e1552SEric Sandeen "running e2fsck is recommended"); 2965ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 29666a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 29676a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2968b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2969b31e1552SEric Sandeen "warning: checktime reached, " 2970b31e1552SEric Sandeen "running e2fsck is recommended"); 29710390131bSFrank Mayhar if (!sbi->s_journal) 2972216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2973ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2974617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2975e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 29766a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 297702f310fcSJan Kara if (sbi->s_journal) { 2978e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 297902f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 298002f310fcSJan Kara ext4_set_feature_orphan_present(sb); 298102f310fcSJan Kara } 2982ac27a0ecSDave Kleikamp 29834392fbc4SJan Kara err = ext4_commit_super(sb); 2984281b5995STheodore Ts'o done: 2985ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2986a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2987a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2988ac27a0ecSDave Kleikamp sb->s_blocksize, 2989ac27a0ecSDave Kleikamp sbi->s_groups_count, 2990617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2991617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2992a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2993ac27a0ecSDave Kleikamp 29947abc52c2SDan Magenheimer cleancache_init_fs(sb); 2995c89128a0SJaegeuk Kim return err; 2996ac27a0ecSDave Kleikamp } 2997ac27a0ecSDave Kleikamp 2998117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2999117fff10STheodore Ts'o { 3000117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 30017c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 300237b0b6b8SDan Carpenter int size, i, j; 3003117fff10STheodore Ts'o 3004117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3005117fff10STheodore Ts'o return 0; 3006117fff10STheodore Ts'o 3007117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3008117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3009117fff10STheodore Ts'o return 0; 3010117fff10STheodore Ts'o 30117c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 30127c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3013117fff10STheodore Ts'o if (!new_groups) { 30147c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 30157c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3016117fff10STheodore Ts'o return -ENOMEM; 3017117fff10STheodore Ts'o } 30187c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 30197c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 30207c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 30217c990728SSuraj Jitindar Singh GFP_KERNEL); 30227c990728SSuraj Jitindar Singh if (!new_groups[i]) { 302337b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 302437b0b6b8SDan Carpenter kvfree(new_groups[j]); 30257c990728SSuraj Jitindar Singh kvfree(new_groups); 30267c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 30277c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 30287c990728SSuraj Jitindar Singh return -ENOMEM; 3029117fff10STheodore Ts'o } 30307c990728SSuraj Jitindar Singh } 30317c990728SSuraj Jitindar Singh rcu_read_lock(); 30327c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 30337c990728SSuraj Jitindar Singh if (old_groups) 30347c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 30357c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 30367c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 30377c990728SSuraj Jitindar Singh rcu_read_unlock(); 30387c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 30397c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 30407c990728SSuraj Jitindar Singh if (old_groups) 30417c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3042117fff10STheodore Ts'o return 0; 3043117fff10STheodore Ts'o } 3044117fff10STheodore Ts'o 3045772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3046772cb7c8SJose R. Santos { 3047772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3048772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 30497c990728SSuraj Jitindar Singh struct flex_groups *fg; 3050772cb7c8SJose R. Santos ext4_group_t flex_group; 3051117fff10STheodore Ts'o int i, err; 3052772cb7c8SJose R. Santos 3053503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3054d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3055772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3056772cb7c8SJose R. Santos return 1; 3057772cb7c8SJose R. Santos } 3058772cb7c8SJose R. Santos 3059117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3060117fff10STheodore Ts'o if (err) 3061772cb7c8SJose R. Santos goto failed; 3062772cb7c8SJose R. Santos 3063772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 306488b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3065772cb7c8SJose R. Santos 3066772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 30677c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 30687c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 306990ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 30707c990728SSuraj Jitindar Singh &fg->free_clusters); 30717c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3072772cb7c8SJose R. Santos } 3073772cb7c8SJose R. Santos 3074772cb7c8SJose R. Santos return 1; 3075772cb7c8SJose R. Santos failed: 3076772cb7c8SJose R. Santos return 0; 3077772cb7c8SJose R. Santos } 3078772cb7c8SJose R. Santos 3079e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3080717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3081717d50e4SAndreas Dilger { 3082b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3083717d50e4SAndreas Dilger __u16 crc = 0; 3084717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3085e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3086717d50e4SAndreas Dilger 30879aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3088feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3089feb0ab32SDarrick J. Wong __u32 csum32; 3090b47820edSDaeho Jeong __u16 dummy_csum = 0; 3091feb0ab32SDarrick J. Wong 3092feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3093feb0ab32SDarrick J. Wong sizeof(le_group)); 3094b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3095b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3096b47820edSDaeho Jeong sizeof(dummy_csum)); 3097b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3098b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3099b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3100b47820edSDaeho Jeong sbi->s_desc_size - offset); 3101feb0ab32SDarrick J. Wong 3102feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3103feb0ab32SDarrick J. Wong goto out; 3104feb0ab32SDarrick J. Wong } 3105feb0ab32SDarrick J. Wong 3106feb0ab32SDarrick J. Wong /* old crc16 code */ 3107e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3108813d32f9SDarrick J. Wong return 0; 3109813d32f9SDarrick J. Wong 3110717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3111717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3112717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3113717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3114717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3115e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3116717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3117717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3118717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3119717d50e4SAndreas Dilger offset); 3120717d50e4SAndreas Dilger 3121feb0ab32SDarrick J. Wong out: 3122717d50e4SAndreas Dilger return cpu_to_le16(crc); 3123717d50e4SAndreas Dilger } 3124717d50e4SAndreas Dilger 3125feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3126717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3127717d50e4SAndreas Dilger { 3128feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3129e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3130717d50e4SAndreas Dilger return 0; 3131717d50e4SAndreas Dilger 3132717d50e4SAndreas Dilger return 1; 3133717d50e4SAndreas Dilger } 3134717d50e4SAndreas Dilger 3135feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3136feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3137feb0ab32SDarrick J. Wong { 3138feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3139feb0ab32SDarrick J. Wong return; 3140e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3141feb0ab32SDarrick J. Wong } 3142feb0ab32SDarrick J. Wong 3143ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3144bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3145829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3146bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3147ac27a0ecSDave Kleikamp { 3148617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3149617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3150617ba13bSMingming Cao ext4_fsblk_t last_block; 315144de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3152bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3153bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3154bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3155ce421581SJose R. Santos int flexbg_flag = 0; 3156bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3157ac27a0ecSDave Kleikamp 3158e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3159ce421581SJose R. Santos flexbg_flag = 1; 3160ce421581SJose R. Santos 3161617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3162ac27a0ecSDave Kleikamp 3163197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3164197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3165197cd65aSAkinobu Mita 3166ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3167bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3168ac27a0ecSDave Kleikamp else 3169ac27a0ecSDave Kleikamp last_block = first_block + 3170617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3171ac27a0ecSDave Kleikamp 3172bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3173bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3174bfff6873SLukas Czerner grp = i; 3175bfff6873SLukas Czerner 31768fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3177829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3178829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3179829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3180829fa70dSTheodore Ts'o "superblock", i); 318118db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 318218db4b4eSTheodore Ts'o return 0; 3183829fa70dSTheodore Ts'o } 318477260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 318577260807STheodore Ts'o block_bitmap <= last_bg_block) { 318677260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 318777260807STheodore Ts'o "Block bitmap for group %u overlaps " 318877260807STheodore Ts'o "block group descriptors", i); 318977260807STheodore Ts'o if (!sb_rdonly(sb)) 319077260807STheodore Ts'o return 0; 319177260807STheodore Ts'o } 31922b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3193b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3194a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3195b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3196ac27a0ecSDave Kleikamp return 0; 3197ac27a0ecSDave Kleikamp } 31988fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3199829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3200829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3201829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3202829fa70dSTheodore Ts'o "superblock", i); 320318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 320418db4b4eSTheodore Ts'o return 0; 3205829fa70dSTheodore Ts'o } 320677260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 320777260807STheodore Ts'o inode_bitmap <= last_bg_block) { 320877260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 320977260807STheodore Ts'o "Inode bitmap for group %u overlaps " 321077260807STheodore Ts'o "block group descriptors", i); 321177260807STheodore Ts'o if (!sb_rdonly(sb)) 321277260807STheodore Ts'o return 0; 321377260807STheodore Ts'o } 32142b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3215b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3216a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3217b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3218ac27a0ecSDave Kleikamp return 0; 3219ac27a0ecSDave Kleikamp } 32208fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3221829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3222829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3223829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3224829fa70dSTheodore Ts'o "superblock", i); 322518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 322618db4b4eSTheodore Ts'o return 0; 3227829fa70dSTheodore Ts'o } 322877260807STheodore Ts'o if (inode_table >= sb_block + 1 && 322977260807STheodore Ts'o inode_table <= last_bg_block) { 323077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 323177260807STheodore Ts'o "Inode table for group %u overlaps " 323277260807STheodore Ts'o "block group descriptors", i); 323377260807STheodore Ts'o if (!sb_rdonly(sb)) 323477260807STheodore Ts'o return 0; 323577260807STheodore Ts'o } 3236bd81d8eeSLaurent Vivier if (inode_table < first_block || 32372b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3238b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3239a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3240b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3241ac27a0ecSDave Kleikamp return 0; 3242ac27a0ecSDave Kleikamp } 3243955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3244feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3245b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3246b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3247e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3248fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3249bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3250955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3251717d50e4SAndreas Dilger return 0; 3252717d50e4SAndreas Dilger } 32537ee1ec4cSLi Zefan } 3254955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3255ce421581SJose R. Santos if (!flexbg_flag) 3256617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3257ac27a0ecSDave Kleikamp } 3258bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3259bfff6873SLukas Czerner *first_not_zeroed = grp; 3260ac27a0ecSDave Kleikamp return 1; 3261ac27a0ecSDave Kleikamp } 3262ac27a0ecSDave Kleikamp 3263cd2291a4SEric Sandeen /* 3264cd2291a4SEric Sandeen * Maximal extent format file size. 3265cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3266cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3267cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3268cd2291a4SEric Sandeen * so that won't be a limiting factor. 3269cd2291a4SEric Sandeen * 3270f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3271f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3272f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3273f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3274f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3275f17722f9SLukas Czerner * 3276cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3277cd2291a4SEric Sandeen */ 3278f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3279cd2291a4SEric Sandeen { 3280cd2291a4SEric Sandeen loff_t res; 3281cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3282cd2291a4SEric Sandeen 328372deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 328472deb455SChristoph Hellwig 328572deb455SChristoph Hellwig if (!has_huge_files) { 3286cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3287cd2291a4SEric Sandeen 3288cd2291a4SEric Sandeen /* total blocks in file system block size */ 3289cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3290cd2291a4SEric Sandeen upper_limit <<= blkbits; 3291cd2291a4SEric Sandeen } 3292cd2291a4SEric Sandeen 3293f17722f9SLukas Czerner /* 3294f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3295f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3296f17722f9SLukas Czerner * size 3297f17722f9SLukas Czerner */ 3298f17722f9SLukas Czerner res = (1LL << 32) - 1; 3299cd2291a4SEric Sandeen res <<= blkbits; 3300cd2291a4SEric Sandeen 3301cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3302cd2291a4SEric Sandeen if (res > upper_limit) 3303cd2291a4SEric Sandeen res = upper_limit; 3304cd2291a4SEric Sandeen 3305cd2291a4SEric Sandeen return res; 3306cd2291a4SEric Sandeen } 3307ac27a0ecSDave Kleikamp 3308ac27a0ecSDave Kleikamp /* 3309cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 33100fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 33110fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3312ac27a0ecSDave Kleikamp */ 3313f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3314ac27a0ecSDave Kleikamp { 331575ca6ad4SRitesh Harjani unsigned long long upper_limit, res = EXT4_NDIR_BLOCKS; 33160fc1b451SAneesh Kumar K.V int meta_blocks; 331775ca6ad4SRitesh Harjani 331875ca6ad4SRitesh Harjani /* 331975ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 33200b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 33210b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 33220b8e58a1SAndreas Dilger * 33230b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 33240b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 33250fc1b451SAneesh Kumar K.V */ 332672deb455SChristoph Hellwig if (!has_huge_files) { 33270fc1b451SAneesh Kumar K.V /* 332872deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 332972deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 333072deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 33310fc1b451SAneesh Kumar K.V */ 33320fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 33330fc1b451SAneesh Kumar K.V 33340fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 33350fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 33360fc1b451SAneesh Kumar K.V 33370fc1b451SAneesh Kumar K.V } else { 33388180a562SAneesh Kumar K.V /* 33398180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 33408180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 33418180a562SAneesh Kumar K.V * represent total number of blocks in 33428180a562SAneesh Kumar K.V * file system block size 33438180a562SAneesh Kumar K.V */ 33440fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 33450fc1b451SAneesh Kumar K.V 33460fc1b451SAneesh Kumar K.V } 33470fc1b451SAneesh Kumar K.V 33480fc1b451SAneesh Kumar K.V /* indirect blocks */ 33490fc1b451SAneesh Kumar K.V meta_blocks = 1; 33500fc1b451SAneesh Kumar K.V /* double indirect blocks */ 33510fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 33520fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 33530fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 33540fc1b451SAneesh Kumar K.V 33550fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 33560fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3357ac27a0ecSDave Kleikamp 3358ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3359ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3360ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3361ac27a0ecSDave Kleikamp res <<= bits; 3362ac27a0ecSDave Kleikamp if (res > upper_limit) 3363ac27a0ecSDave Kleikamp res = upper_limit; 33640fc1b451SAneesh Kumar K.V 33650fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 33660fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 33670fc1b451SAneesh Kumar K.V 336875ca6ad4SRitesh Harjani return (loff_t)res; 3369ac27a0ecSDave Kleikamp } 3370ac27a0ecSDave Kleikamp 3371617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 337270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3373ac27a0ecSDave Kleikamp { 3374617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3375fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3376ac27a0ecSDave Kleikamp int has_super = 0; 3377ac27a0ecSDave Kleikamp 3378ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3379ac27a0ecSDave Kleikamp 3380e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 338170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3382ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3383617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3384ac27a0ecSDave Kleikamp has_super = 1; 33850b8e58a1SAndreas Dilger 3386bd63f6b0SDarrick J. Wong /* 3387bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3388bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3389bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3390bd63f6b0SDarrick J. Wong * compensate. 3391bd63f6b0SDarrick J. Wong */ 3392bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 339349598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3394bd63f6b0SDarrick J. Wong has_super++; 3395bd63f6b0SDarrick J. Wong 3396617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3397ac27a0ecSDave Kleikamp } 3398ac27a0ecSDave Kleikamp 3399c9de560dSAlex Tomas /** 3400c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3401c9de560dSAlex Tomas * @sbi: In memory super block info 3402c9de560dSAlex Tomas * 3403c9de560dSAlex Tomas * If we have specified it via mount option, then 3404c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3405c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3406c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3407c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3408c9de560dSAlex Tomas * 3409c9de560dSAlex Tomas */ 3410c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3411c9de560dSAlex Tomas { 3412c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3413c9de560dSAlex Tomas unsigned long stripe_width = 3414c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 34153eb08658SDan Ehrenberg int ret; 3416c9de560dSAlex Tomas 3417c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 34183eb08658SDan Ehrenberg ret = sbi->s_stripe; 34195469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 34203eb08658SDan Ehrenberg ret = stripe_width; 34215469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 34223eb08658SDan Ehrenberg ret = stride; 34233eb08658SDan Ehrenberg else 34243eb08658SDan Ehrenberg ret = 0; 3425c9de560dSAlex Tomas 34263eb08658SDan Ehrenberg /* 34273eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 34283eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 34293eb08658SDan Ehrenberg */ 34303eb08658SDan Ehrenberg if (ret <= 1) 34313eb08658SDan Ehrenberg ret = 0; 3432c9de560dSAlex Tomas 34333eb08658SDan Ehrenberg return ret; 3434c9de560dSAlex Tomas } 3435ac27a0ecSDave Kleikamp 3436a13fb1a4SEric Sandeen /* 3437a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3438a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3439a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3440a13fb1a4SEric Sandeen * 0 if it cannot be. 3441a13fb1a4SEric Sandeen */ 344225c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3443a13fb1a4SEric Sandeen { 3444e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3445a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3446a13fb1a4SEric Sandeen "Couldn't mount because of " 3447a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3448a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3449a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3450a13fb1a4SEric Sandeen return 0; 3451a13fb1a4SEric Sandeen } 3452a13fb1a4SEric Sandeen 3453c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3454c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3455c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3456c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3457c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3458c83ad55eSGabriel Krisman Bertazi return 0; 3459c83ad55eSGabriel Krisman Bertazi } 3460c83ad55eSGabriel Krisman Bertazi #endif 3461c83ad55eSGabriel Krisman Bertazi 3462a13fb1a4SEric Sandeen if (readonly) 3463a13fb1a4SEric Sandeen return 1; 3464a13fb1a4SEric Sandeen 3465e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 34662cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 34671751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 34682cb5cc8bSDarrick J. Wong return 1; 34692cb5cc8bSDarrick J. Wong } 34702cb5cc8bSDarrick J. Wong 3471a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3472e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3473a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3474a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3475a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3476a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3477a13fb1a4SEric Sandeen return 0; 3478a13fb1a4SEric Sandeen } 3479e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3480bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3481bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3482bab08ab9STheodore Ts'o "extents feature\n"); 3483bab08ab9STheodore Ts'o return 0; 3484bab08ab9STheodore Ts'o } 34857c319d32SAditya Kali 34869db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3487d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3488d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 34897c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3490d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3491689c958cSLi Xi return 0; 3492689c958cSLi Xi } 34937c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3494a13fb1a4SEric Sandeen return 1; 3495a13fb1a4SEric Sandeen } 3496a13fb1a4SEric Sandeen 349766e61a9eSTheodore Ts'o /* 349866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 349966e61a9eSTheodore Ts'o * on the file system 350066e61a9eSTheodore Ts'o */ 3501235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 350266e61a9eSTheodore Ts'o { 3503235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3504235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3505235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 350666e61a9eSTheodore Ts'o 350766e61a9eSTheodore Ts'o if (es->s_error_count) 3508ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3509ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 351066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 351166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 35126a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 35136a0678a7SArnd Bergmann sb->s_id, 35146a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 351566e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 351666e61a9eSTheodore Ts'o es->s_first_error_func, 351766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 351866e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3519651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 352066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 352166e61a9eSTheodore Ts'o if (es->s_first_error_block) 3522651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 352366e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3524651e1c3bSJoe Perches printk(KERN_CONT "\n"); 352566e61a9eSTheodore Ts'o } 352666e61a9eSTheodore Ts'o if (es->s_last_error_time) { 35276a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 35286a0678a7SArnd Bergmann sb->s_id, 35296a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 353066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 353166e61a9eSTheodore Ts'o es->s_last_error_func, 353266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 353366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3534651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 353566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 353666e61a9eSTheodore Ts'o if (es->s_last_error_block) 3537651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 353866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3539651e1c3bSJoe Perches printk(KERN_CONT "\n"); 354066e61a9eSTheodore Ts'o } 354166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 354266e61a9eSTheodore Ts'o } 354366e61a9eSTheodore Ts'o 3544bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3545bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3546bfff6873SLukas Czerner { 3547bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 35483d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 35493d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 35503d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 35513d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3552bfff6873SLukas Czerner int ret = 0; 355339fec688SShaoying Xu u64 start_time; 3554bfff6873SLukas Czerner 35553d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 35563d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 35573d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 35583d392b26STheodore Ts'o if (prefetch_ios) 35593d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 35603d392b26STheodore Ts'o prefetch_ios); 35613d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 35623d392b26STheodore Ts'o prefetch_ios); 35633d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 35643d392b26STheodore Ts'o ret = 1; 35653d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 35663d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 35673d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 35683d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 35693d392b26STheodore Ts'o ret = 0; 35703d392b26STheodore Ts'o } 35713d392b26STheodore Ts'o } 35723d392b26STheodore Ts'o return ret; 35733d392b26STheodore Ts'o } 3574bfff6873SLukas Czerner 35753d392b26STheodore Ts'o for (; group < ngroups; group++) { 3576bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3577bfff6873SLukas Czerner if (!gdp) { 3578bfff6873SLukas Czerner ret = 1; 3579bfff6873SLukas Czerner break; 3580bfff6873SLukas Czerner } 3581bfff6873SLukas Czerner 3582bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3583bfff6873SLukas Czerner break; 3584bfff6873SLukas Czerner } 3585bfff6873SLukas Czerner 35867f511862STheodore Ts'o if (group >= ngroups) 3587bfff6873SLukas Czerner ret = 1; 3588bfff6873SLukas Czerner 3589bfff6873SLukas Czerner if (!ret) { 359039fec688SShaoying Xu start_time = ktime_get_real_ns(); 3591bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3592bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 35933d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3594bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 359539fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 359639fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3597bfff6873SLukas Czerner } 3598bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3599bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3600bfff6873SLukas Czerner } 3601bfff6873SLukas Czerner return ret; 3602bfff6873SLukas Czerner } 3603bfff6873SLukas Czerner 3604bfff6873SLukas Czerner /* 3605bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 36064ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3607bfff6873SLukas Czerner */ 3608bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3609bfff6873SLukas Czerner { 3610bfff6873SLukas Czerner if (!elr) 3611bfff6873SLukas Czerner return; 3612bfff6873SLukas Czerner 3613bfff6873SLukas Czerner list_del(&elr->lr_request); 36143d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3615bfff6873SLukas Czerner kfree(elr); 3616bfff6873SLukas Czerner } 3617bfff6873SLukas Czerner 3618bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3619bfff6873SLukas Czerner { 36201bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 36211bb933fbSLukas Czerner if (!ext4_li_info) { 36221bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3623bfff6873SLukas Czerner return; 36241bb933fbSLukas Czerner } 3625bfff6873SLukas Czerner 3626bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 36271bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3628bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 36291bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3630bfff6873SLukas Czerner } 3631bfff6873SLukas Czerner 36328f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 36338f1f7453SEric Sandeen 3634bfff6873SLukas Czerner /* 3635bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3636bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3637bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3638bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3639bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3640bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3641bfff6873SLukas Czerner * next waking time and put itself into sleep. 3642bfff6873SLukas Czerner */ 3643bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3644bfff6873SLukas Czerner { 3645bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3646bfff6873SLukas Czerner struct list_head *pos, *n; 3647bfff6873SLukas Czerner struct ext4_li_request *elr; 36484ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3649bfff6873SLukas Czerner 3650bfff6873SLukas Czerner BUG_ON(NULL == eli); 3651bfff6873SLukas Czerner 3652bfff6873SLukas Czerner cont_thread: 3653bfff6873SLukas Czerner while (true) { 3654bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3655bfff6873SLukas Czerner 3656bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3657bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3658bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3659bfff6873SLukas Czerner goto exit_thread; 3660bfff6873SLukas Czerner } 3661bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3662e22834f0SDmitry Monakhov int err = 0; 3663e22834f0SDmitry Monakhov int progress = 0; 3664bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3665bfff6873SLukas Czerner lr_request); 3666bfff6873SLukas Czerner 3667e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3668e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3669e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3670e22834f0SDmitry Monakhov continue; 3671e22834f0SDmitry Monakhov } 3672e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3673e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3674e22834f0SDmitry Monakhov progress = 1; 3675e22834f0SDmitry Monakhov /* 3676e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3677e22834f0SDmitry Monakhov * be removed from the list, it is 3678e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3679e22834f0SDmitry Monakhov */ 3680e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3681e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3682e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3683e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3684e22834f0SDmitry Monakhov n = pos->next; 3685e22834f0SDmitry Monakhov } 3686e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3687e22834f0SDmitry Monakhov } 3688b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3689e22834f0SDmitry Monakhov if (err) { 3690bfff6873SLukas Czerner ext4_remove_li_request(elr); 3691bfff6873SLukas Czerner continue; 3692bfff6873SLukas Czerner } 3693e22834f0SDmitry Monakhov if (!progress) { 3694e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3695e22834f0SDmitry Monakhov (prandom_u32() 3696e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3697b2c78cd0STheodore Ts'o } 3698bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3699bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3700bfff6873SLukas Czerner } 3701bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3702bfff6873SLukas Czerner 3703a0acae0eSTejun Heo try_to_freeze(); 3704bfff6873SLukas Czerner 37054ed5c033SLukas Czerner cur = jiffies; 37064ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3707f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3708bfff6873SLukas Czerner cond_resched(); 3709bfff6873SLukas Czerner continue; 3710bfff6873SLukas Czerner } 3711bfff6873SLukas Czerner 37124ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 37134ed5c033SLukas Czerner 37148f1f7453SEric Sandeen if (kthread_should_stop()) { 37158f1f7453SEric Sandeen ext4_clear_request_list(); 37168f1f7453SEric Sandeen goto exit_thread; 37178f1f7453SEric Sandeen } 3718bfff6873SLukas Czerner } 3719bfff6873SLukas Czerner 3720bfff6873SLukas Czerner exit_thread: 3721bfff6873SLukas Czerner /* 3722bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3723bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3724bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3725bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3726bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3727bfff6873SLukas Czerner * new one. 3728bfff6873SLukas Czerner */ 3729bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3730bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3731bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3732bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3733bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3734bfff6873SLukas Czerner goto cont_thread; 3735bfff6873SLukas Czerner } 3736bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3737bfff6873SLukas Czerner kfree(ext4_li_info); 3738bfff6873SLukas Czerner ext4_li_info = NULL; 3739bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3740bfff6873SLukas Czerner 3741bfff6873SLukas Czerner return 0; 3742bfff6873SLukas Czerner } 3743bfff6873SLukas Czerner 3744bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3745bfff6873SLukas Czerner { 3746bfff6873SLukas Czerner struct list_head *pos, *n; 3747bfff6873SLukas Czerner struct ext4_li_request *elr; 3748bfff6873SLukas Czerner 3749bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3750bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3751bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3752bfff6873SLukas Czerner lr_request); 3753bfff6873SLukas Czerner ext4_remove_li_request(elr); 3754bfff6873SLukas Czerner } 3755bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3756bfff6873SLukas Czerner } 3757bfff6873SLukas Czerner 3758bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3759bfff6873SLukas Czerner { 37608f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 37618f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 37628f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 37638f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3764bfff6873SLukas Czerner ext4_clear_request_list(); 3765bfff6873SLukas Czerner kfree(ext4_li_info); 3766bfff6873SLukas Czerner ext4_li_info = NULL; 376792b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3768bfff6873SLukas Czerner "initialization thread\n", 3769bfff6873SLukas Czerner err); 3770bfff6873SLukas Czerner return err; 3771bfff6873SLukas Czerner } 3772bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3773bfff6873SLukas Czerner return 0; 3774bfff6873SLukas Czerner } 3775bfff6873SLukas Czerner 3776bfff6873SLukas Czerner /* 3777bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3778bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3779bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3780bfff6873SLukas Czerner * groups and return total number of groups. 3781bfff6873SLukas Czerner */ 3782bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3783bfff6873SLukas Czerner { 3784bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3785bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3786bfff6873SLukas Czerner 37878844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 37888844618dSTheodore Ts'o return ngroups; 37898844618dSTheodore Ts'o 3790bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3791bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3792bfff6873SLukas Czerner if (!gdp) 3793bfff6873SLukas Czerner continue; 3794bfff6873SLukas Czerner 379550122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3796bfff6873SLukas Czerner break; 3797bfff6873SLukas Czerner } 3798bfff6873SLukas Czerner 3799bfff6873SLukas Czerner return group; 3800bfff6873SLukas Czerner } 3801bfff6873SLukas Czerner 3802bfff6873SLukas Czerner static int ext4_li_info_new(void) 3803bfff6873SLukas Czerner { 3804bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3805bfff6873SLukas Czerner 3806bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3807bfff6873SLukas Czerner if (!eli) 3808bfff6873SLukas Czerner return -ENOMEM; 3809bfff6873SLukas Czerner 3810bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3811bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3812bfff6873SLukas Czerner 3813bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3814bfff6873SLukas Czerner 3815bfff6873SLukas Czerner ext4_li_info = eli; 3816bfff6873SLukas Czerner 3817bfff6873SLukas Czerner return 0; 3818bfff6873SLukas Czerner } 3819bfff6873SLukas Czerner 3820bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3821bfff6873SLukas Czerner ext4_group_t start) 3822bfff6873SLukas Czerner { 3823bfff6873SLukas Czerner struct ext4_li_request *elr; 3824bfff6873SLukas Czerner 3825bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3826bfff6873SLukas Czerner if (!elr) 3827bfff6873SLukas Czerner return NULL; 3828bfff6873SLukas Czerner 3829bfff6873SLukas Czerner elr->lr_super = sb; 38303d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 383121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 38323d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3833bfff6873SLukas Czerner elr->lr_next_group = start; 383421175ca4SHarshad Shirwadkar } else { 383521175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 38363d392b26STheodore Ts'o } 3837bfff6873SLukas Czerner 3838bfff6873SLukas Czerner /* 3839bfff6873SLukas Czerner * Randomize first schedule time of the request to 3840bfff6873SLukas Czerner * spread the inode table initialization requests 3841bfff6873SLukas Czerner * better. 3842bfff6873SLukas Czerner */ 3843dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3844dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3845bfff6873SLukas Czerner return elr; 3846bfff6873SLukas Czerner } 3847bfff6873SLukas Czerner 38487f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3849bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3850bfff6873SLukas Czerner { 3851bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 38527f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 385349598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 38546c5a6cb9SAndrew Morton int ret = 0; 3855bfff6873SLukas Czerner 38567f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 385751ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 385851ce6511SLukas Czerner /* 385951ce6511SLukas Czerner * Reset timeout so it can be computed again, because 386051ce6511SLukas Czerner * s_li_wait_mult might have changed. 386151ce6511SLukas Czerner */ 386251ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 38637f511862STheodore Ts'o goto out; 386451ce6511SLukas Czerner } 3865bfff6873SLukas Czerner 386621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 38673d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 38683d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 38697f511862STheodore Ts'o goto out; 3870bfff6873SLukas Czerner 3871bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 38727f511862STheodore Ts'o if (!elr) { 38737f511862STheodore Ts'o ret = -ENOMEM; 38747f511862STheodore Ts'o goto out; 38757f511862STheodore Ts'o } 3876bfff6873SLukas Czerner 3877bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3878bfff6873SLukas Czerner ret = ext4_li_info_new(); 3879bfff6873SLukas Czerner if (ret) 3880bfff6873SLukas Czerner goto out; 3881bfff6873SLukas Czerner } 3882bfff6873SLukas Czerner 3883bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3884bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3885bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3886bfff6873SLukas Czerner 3887bfff6873SLukas Czerner sbi->s_li_request = elr; 388846e4690bSTao Ma /* 388946e4690bSTao Ma * set elr to NULL here since it has been inserted to 389046e4690bSTao Ma * the request_list and the removal and free of it is 389146e4690bSTao Ma * handled by ext4_clear_request_list from now on. 389246e4690bSTao Ma */ 389346e4690bSTao Ma elr = NULL; 3894bfff6873SLukas Czerner 3895bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3896bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3897bfff6873SLukas Czerner if (ret) 3898bfff6873SLukas Czerner goto out; 3899bfff6873SLukas Czerner } 3900bfff6873SLukas Czerner out: 3901bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3902beed5ecbSNicolas Kaiser if (ret) 3903bfff6873SLukas Czerner kfree(elr); 3904bfff6873SLukas Czerner return ret; 3905bfff6873SLukas Czerner } 3906bfff6873SLukas Czerner 3907bfff6873SLukas Czerner /* 3908bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3909bfff6873SLukas Czerner * module unload. 3910bfff6873SLukas Czerner */ 3911bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3912bfff6873SLukas Czerner { 3913bfff6873SLukas Czerner /* 3914bfff6873SLukas Czerner * If thread exited earlier 3915bfff6873SLukas Czerner * there's nothing to be done. 3916bfff6873SLukas Czerner */ 39178f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3918bfff6873SLukas Czerner return; 3919bfff6873SLukas Czerner 39208f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3921bfff6873SLukas Czerner } 3922bfff6873SLukas Czerner 392325ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 392425ed6e8aSDarrick J. Wong { 392525ed6e8aSDarrick J. Wong int ret = 1; 392625ed6e8aSDarrick J. Wong int compat, incompat; 392725ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 392825ed6e8aSDarrick J. Wong 39299aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3930db9ee220SDarrick J. Wong /* journal checksum v3 */ 393125ed6e8aSDarrick J. Wong compat = 0; 3932db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 393325ed6e8aSDarrick J. Wong } else { 393425ed6e8aSDarrick J. Wong /* journal checksum v1 */ 393525ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 393625ed6e8aSDarrick J. Wong incompat = 0; 393725ed6e8aSDarrick J. Wong } 393825ed6e8aSDarrick J. Wong 3939feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3940feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3941feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3942feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 394325ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 394425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 394525ed6e8aSDarrick J. Wong compat, 0, 394625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 394725ed6e8aSDarrick J. Wong incompat); 394825ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 394925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 395025ed6e8aSDarrick J. Wong compat, 0, 395125ed6e8aSDarrick J. Wong incompat); 395225ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 395325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 395425ed6e8aSDarrick J. Wong } else { 3955feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3956feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 395725ed6e8aSDarrick J. Wong } 395825ed6e8aSDarrick J. Wong 395925ed6e8aSDarrick J. Wong return ret; 396025ed6e8aSDarrick J. Wong } 396125ed6e8aSDarrick J. Wong 3962952fc18eSTheodore Ts'o /* 3963952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3964952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3965952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3966952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3967952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3968952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3969952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3970952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3971952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3972952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3973952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3974952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3975952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3976952fc18eSTheodore Ts'o */ 3977952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3978952fc18eSTheodore Ts'o char *buf) 3979952fc18eSTheodore Ts'o { 3980952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3981952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3982952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3983952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3984952fc18eSTheodore Ts'o int s, j, count = 0; 3985952fc18eSTheodore Ts'o 3986e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 39870548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 39880548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 39890548bbb8STheodore Ts'o 3990952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3991952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3992952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3993952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3994952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3995952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3996952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3997952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3998952fc18eSTheodore Ts'o count++; 3999952fc18eSTheodore Ts'o } 4000952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4001952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4002952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4003952fc18eSTheodore Ts'o count++; 4004952fc18eSTheodore Ts'o } 4005952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4006952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4007952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4008952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4009952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4010952fc18eSTheodore Ts'o count++; 4011952fc18eSTheodore Ts'o } 4012952fc18eSTheodore Ts'o if (i != grp) 4013952fc18eSTheodore Ts'o continue; 4014952fc18eSTheodore Ts'o s = 0; 4015952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4016952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4017952fc18eSTheodore Ts'o count++; 4018952fc18eSTheodore Ts'o } 4019c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4020c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4021c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4022c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4023c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4024952fc18eSTheodore Ts'o } 4025c48ae41bSTheodore Ts'o count += j; 4026c48ae41bSTheodore Ts'o for (; j > 0; j--) 4027c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4028952fc18eSTheodore Ts'o } 4029952fc18eSTheodore Ts'o if (!count) 4030952fc18eSTheodore Ts'o return 0; 4031952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4032952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4033952fc18eSTheodore Ts'o } 4034952fc18eSTheodore Ts'o 4035952fc18eSTheodore Ts'o /* 4036952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4037952fc18eSTheodore Ts'o */ 4038952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4039952fc18eSTheodore Ts'o { 4040952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4041952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 40423c816dedSEric Whitney struct inode *j_inode; 40433c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4044952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4045952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 40464fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4047952fc18eSTheodore Ts'o 4048952fc18eSTheodore Ts'o if (!buf) 4049952fc18eSTheodore Ts'o return -ENOMEM; 4050952fc18eSTheodore Ts'o 4051952fc18eSTheodore Ts'o /* 4052952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4053952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4054952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4055952fc18eSTheodore Ts'o */ 4056952fc18eSTheodore Ts'o 4057952fc18eSTheodore Ts'o /* 4058952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4059952fc18eSTheodore Ts'o */ 4060952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4061952fc18eSTheodore Ts'o 4062952fc18eSTheodore Ts'o /* 4063952fc18eSTheodore Ts'o * Add the overhead found in each block group 4064952fc18eSTheodore Ts'o */ 4065952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4066952fc18eSTheodore Ts'o int blks; 4067952fc18eSTheodore Ts'o 4068952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4069952fc18eSTheodore Ts'o overhead += blks; 4070952fc18eSTheodore Ts'o if (blks) 4071952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4072952fc18eSTheodore Ts'o cond_resched(); 4073952fc18eSTheodore Ts'o } 40743c816dedSEric Whitney 40753c816dedSEric Whitney /* 40763c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 40773c816dedSEric Whitney * loaded or not 40783c816dedSEric Whitney */ 4079ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4080ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4081f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4082f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 40833c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 40843c816dedSEric Whitney if (j_inode) { 40853c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 40863c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 40873c816dedSEric Whitney iput(j_inode); 40883c816dedSEric Whitney } else { 40893c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 40903c816dedSEric Whitney } 40913c816dedSEric Whitney } 4092952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4093952fc18eSTheodore Ts'o smp_wmb(); 4094952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4095952fc18eSTheodore Ts'o return 0; 4096952fc18eSTheodore Ts'o } 4097952fc18eSTheodore Ts'o 4098b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 409927dd4385SLukas Czerner { 410027dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4101b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 410227dd4385SLukas Czerner 410327dd4385SLukas Czerner /* 410430fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 410530fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 410630fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 410730fac0f7SJan Kara * to keep ext2/3 backward compatibility. 410830fac0f7SJan Kara */ 4109e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4110b5799018STheodore Ts'o return; 411130fac0f7SJan Kara /* 411227dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 411327dd4385SLukas Czerner * This should cover the situations where we can not afford to run 411427dd4385SLukas Czerner * out of space like for example punch hole, or converting 4115556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 411627dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 411727dd4385SLukas Czerner * very rare. 411827dd4385SLukas Czerner */ 4119b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4120b5799018STheodore Ts'o sbi->s_cluster_bits); 412127dd4385SLukas Czerner 412227dd4385SLukas Czerner do_div(resv_clusters, 50); 412327dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 412427dd4385SLukas Czerner 4125b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 412627dd4385SLukas Czerner } 412727dd4385SLukas Czerner 4128ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4129ca9b404fSRoman Anufriev { 4130ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4131ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4132ca9b404fSRoman Anufriev return "none"; 4133ca9b404fSRoman Anufriev 4134ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4135ca9b404fSRoman Anufriev return "journalled"; 4136ca9b404fSRoman Anufriev else 4137ca9b404fSRoman Anufriev return "writeback"; 4138ca9b404fSRoman Anufriev #else 4139ca9b404fSRoman Anufriev return "disabled"; 4140ca9b404fSRoman Anufriev #endif 4141ca9b404fSRoman Anufriev } 4142ca9b404fSRoman Anufriev 4143188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4144188c299eSJan Kara enum ext4_journal_trigger_type type, 4145188c299eSJan Kara void (*trigger)( 4146188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4147188c299eSJan Kara struct buffer_head *bh, 4148188c299eSJan Kara void *mapped_data, 4149188c299eSJan Kara size_t size)) 4150188c299eSJan Kara { 4151188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4152188c299eSJan Kara 4153188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4154188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4155188c299eSJan Kara } 4156188c299eSJan Kara 4157617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 4158ac27a0ecSDave Kleikamp { 41595e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 4160d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 41611d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4162617ba13bSMingming Cao struct ext4_super_block *es = NULL; 41635aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 41647c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4165617ba13bSMingming Cao ext4_fsblk_t block; 4166617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 416770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4168ac27a0ecSDave Kleikamp unsigned long offset = 0; 4169ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4170ac27a0ecSDave Kleikamp struct inode *root; 41710390131bSFrank Mayhar const char *descr; 4172dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4173281b5995STheodore Ts'o int blocksize, clustersize; 41744ec11028STheodore Ts'o unsigned int db_count; 41754ec11028STheodore Ts'o unsigned int i; 4176ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4177bd81d8eeSLaurent Vivier __u64 blocks_count; 417807aa2ea1SLukas Czerner int err = 0; 4179bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4180*e6e268cbSLukas Czerner struct ext4_fs_context parsed_opts = {0}; 4181b237e304SHarshad Shirwadkar 4182b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4183b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4184b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 4185196e402aSHarshad Shirwadkar parsed_opts.mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4186ac27a0ecSDave Kleikamp 41875aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 41885aee0f8aSTheodore Ts'o goto out_free_base; 4189705895b6SPekka Enberg 4190aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 4191705895b6SPekka Enberg sbi->s_blockgroup_lock = 4192705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 41935aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 41945aee0f8aSTheodore Ts'o goto out_free_base; 41955aee0f8aSTheodore Ts'o 4196ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 41972c0544b2STheodore Ts'o sbi->s_sb = sb; 4198240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4199d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 4200f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 42018446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4202ac27a0ecSDave Kleikamp 42039f6200bbSTheodore Ts'o /* Cleanup superblock name */ 4204ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 42059f6200bbSTheodore Ts'o 420607aa2ea1SLukas Czerner /* -EINVAL is default */ 4207dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4208617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4209ac27a0ecSDave Kleikamp if (!blocksize) { 4210b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4211ac27a0ecSDave Kleikamp goto out_fail; 4212ac27a0ecSDave Kleikamp } 4213ac27a0ecSDave Kleikamp 4214ac27a0ecSDave Kleikamp /* 4215617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4216ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4217ac27a0ecSDave Kleikamp */ 4218617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 421970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 422070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4221ac27a0ecSDave Kleikamp } else { 422270bbb3e0SAndrew Morton logical_sb_block = sb_block; 4223ac27a0ecSDave Kleikamp } 4224ac27a0ecSDave Kleikamp 42258394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 42268394a6abSzhangyi (F) if (IS_ERR(bh)) { 4227b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 42288394a6abSzhangyi (F) ret = PTR_ERR(bh); 4229ac27a0ecSDave Kleikamp goto out_fail; 4230ac27a0ecSDave Kleikamp } 4231ac27a0ecSDave Kleikamp /* 4232ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4233617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4234ac27a0ecSDave Kleikamp */ 42352716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4236ac27a0ecSDave Kleikamp sbi->s_es = es; 4237ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4238617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4239617ba13bSMingming Cao goto cantfind_ext4; 4240afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4241ac27a0ecSDave Kleikamp 4242feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4243e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4244e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4245363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4246feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4247feb0ab32SDarrick J. Wong 4248d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4249d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4250d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4251d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4252d25425f8SDarrick J. Wong silent = 1; 4253d25425f8SDarrick J. Wong goto cantfind_ext4; 4254d25425f8SDarrick J. Wong } 425502f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 425602f310fcSJan Kara ext4_orphan_file_block_trigger); 4257d25425f8SDarrick J. Wong 42580441984aSDarrick J. Wong /* Load the checksum driver */ 42590441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 42600441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 42610441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 42620441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 42630441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 42640441984aSDarrick J. Wong goto failed_mount; 42650441984aSDarrick J. Wong } 42660441984aSDarrick J. Wong 4267a9c47317SDarrick J. Wong /* Check superblock checksum */ 4268a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4269a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4270a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4271a9c47317SDarrick J. Wong silent = 1; 42726a797d27SDarrick J. Wong ret = -EFSBADCRC; 4273a9c47317SDarrick J. Wong goto cantfind_ext4; 4274a9c47317SDarrick J. Wong } 4275a9c47317SDarrick J. Wong 4276a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4277e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 42788c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4279dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4280a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4281a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4282a9c47317SDarrick J. Wong 4283ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4284ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4285fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4286617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4287fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 428887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4289fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4290617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4291fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4292ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4293fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 429403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4295fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 42962e7842b8SHugh Dickins #endif 4297995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4298995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 429998c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 430098c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 430198c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 430298c1a759SDarrick J. Wong 4303617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4304fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4305617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4306fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4307617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4308fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4309ac27a0ecSDave Kleikamp 4310617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4311fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4312bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4313fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4314bb4f397aSAneesh Kumar K.V else 4315fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 431645f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4317fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 43188b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4319fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4320ac27a0ecSDave Kleikamp 432108cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 432208cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 432330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 432430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 432530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4326ac27a0ecSDave Kleikamp 43278b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4328fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4329ac27a0ecSDave Kleikamp 43301e2462f9SMingming Cao /* 4331dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4332dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4333dd919b98SAneesh Kumar K.V */ 4334bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 43358b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4336fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4337dd919b98SAneesh Kumar K.V 433851ce6511SLukas Czerner /* 433951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 434051ce6511SLukas Czerner * no mount option specified. 434151ce6511SLukas Czerner */ 434251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 434351ce6511SLukas Czerner 4344c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4345c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4346c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4347c9200760STheodore Ts'o "Invalid log block size: %u", 4348c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4349c9200760STheodore Ts'o goto failed_mount; 4350c9200760STheodore Ts'o } 4351c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4352c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4353c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4354c9200760STheodore Ts'o "Invalid log cluster size: %u", 4355c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4356c9200760STheodore Ts'o goto failed_mount; 4357c9200760STheodore Ts'o } 4358c9200760STheodore Ts'o 4359c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4360626b035bSRitesh Harjani 4361626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4362626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4363626b035bSRitesh Harjani 43649803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 43659803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 43669803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 43679803387cSTheodore Ts'o } else { 43689803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 43699803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 43709803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 43719803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 43729803387cSTheodore Ts'o sbi->s_first_ino); 43739803387cSTheodore Ts'o goto failed_mount; 43749803387cSTheodore Ts'o } 43759803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 43769803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 43779803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 43789803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 43799803387cSTheodore Ts'o "unsupported inode size: %d", 43809803387cSTheodore Ts'o sbi->s_inode_size); 43814f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 43829803387cSTheodore Ts'o goto failed_mount; 43839803387cSTheodore Ts'o } 43849803387cSTheodore Ts'o /* 43859803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 43869803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 43879803387cSTheodore Ts'o * field should suffice to ensure we have extra space 43889803387cSTheodore Ts'o * for all three. 43899803387cSTheodore Ts'o */ 43909803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 43919803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 43929803387cSTheodore Ts'o sb->s_time_gran = 1; 43939803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 43949803387cSTheodore Ts'o } else { 43959803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 43969803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 43979803387cSTheodore Ts'o } 43989803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 43999803387cSTheodore Ts'o } 44009803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 44019803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 44029803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 44039803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 44049803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 44059803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 44069803387cSTheodore Ts'o 44079803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 44089803387cSTheodore Ts'o if (v > max) { 44099803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 44109803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 44119803387cSTheodore Ts'o goto failed_mount; 44129803387cSTheodore Ts'o } 44139803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 44149803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 44159803387cSTheodore Ts'o 44169803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 44179803387cSTheodore Ts'o if (v > max) { 44189803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 44199803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 44209803387cSTheodore Ts'o goto failed_mount; 44219803387cSTheodore Ts'o } 44229803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 44239803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 44249803387cSTheodore Ts'o } 44259803387cSTheodore Ts'o } 44269803387cSTheodore Ts'o 44275aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 44285aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 44295aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 44305aee0f8aSTheodore Ts'o GFP_KERNEL); 44315aee0f8aSTheodore Ts'o if (!s_mount_opts) 44325aee0f8aSTheodore Ts'o goto failed_mount; 4433b237e304SHarshad Shirwadkar if (!parse_options(s_mount_opts, sb, &parsed_opts, 0)) { 44348b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 44358b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 44365aee0f8aSTheodore Ts'o s_mount_opts); 44375aee0f8aSTheodore Ts'o } 44385aee0f8aSTheodore Ts'o kfree(s_mount_opts); 44398b67f04aSTheodore Ts'o } 44405a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 4441b237e304SHarshad Shirwadkar if (!parse_options((char *) data, sb, &parsed_opts, 0)) 4442ac27a0ecSDave Kleikamp goto failed_mount; 4443ac27a0ecSDave Kleikamp 4444c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4445f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4446c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4447c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4448c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4449c83ad55eSGabriel Krisman Bertazi 4450c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4451c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4452c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4453c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4454c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4455c83ad55eSGabriel Krisman Bertazi } 4456c83ad55eSGabriel Krisman Bertazi 4457c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4458c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4459c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4460c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4461c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4462c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4463c83ad55eSGabriel Krisman Bertazi encoding_flags); 4464c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4465c83ad55eSGabriel Krisman Bertazi } 4466c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4467c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4468c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4469c83ad55eSGabriel Krisman Bertazi 4470f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4471f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4472c83ad55eSGabriel Krisman Bertazi } 4473c83ad55eSGabriel Krisman Bertazi #endif 4474c83ad55eSGabriel Krisman Bertazi 447556889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4476556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4477781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4478244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4479556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 448056889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 448156889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 448256889787STheodore Ts'o "both data=journal and delalloc"); 448356889787STheodore Ts'o goto failed_mount; 448456889787STheodore Ts'o } 4485fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4486923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4487923ae0ffSRoss Zwisler "both data=journal and dax"); 4488923ae0ffSRoss Zwisler goto failed_mount; 4489923ae0ffSRoss Zwisler } 449073b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 449173b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 449273b92a2aSSergey Karamov "encrypted files will use data=ordered " 449373b92a2aSSergey Karamov "instead of data journaling mode"); 449473b92a2aSSergey Karamov } 449556889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 449656889787STheodore Ts'o clear_opt(sb, DELALLOC); 4497001e4a87STejun Heo } else { 4498001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 449956889787STheodore Ts'o } 450056889787STheodore Ts'o 45011751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 45021751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4503ac27a0ecSDave Kleikamp 4504617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4505e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4506e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4507e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4508b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4509b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4510b31e1552SEric Sandeen "running e2fsck is recommended"); 4511469108ffSTheodore Tso 4512ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4513ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4514e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4515ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4516ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4517ed3654ebSTheodore Ts'o goto failed_mount; 4518ed3654ebSTheodore Ts'o } 4519dec214d0STahsin Erdogan 4520dec214d0STahsin Erdogan /* 4521dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4522dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4523dec214d0STahsin Erdogan */ 4524dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4525dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4526dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4527dec214d0STahsin Erdogan goto failed_mount; 4528dec214d0STahsin Erdogan } 4529ed3654ebSTheodore Ts'o } 4530ed3654ebSTheodore Ts'o 45312035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 45322035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 45332035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 45342035e776STheodore Ts'o "using the ext4 subsystem"); 45352035e776STheodore Ts'o else { 45360d9366d6SEric Sandeen /* 45370d9366d6SEric Sandeen * If we're probing be silent, if this looks like 45380d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 45390d9366d6SEric Sandeen */ 45400d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 45410d9366d6SEric Sandeen goto failed_mount; 45422035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 45432035e776STheodore Ts'o "to feature incompatibilities"); 45442035e776STheodore Ts'o goto failed_mount; 45452035e776STheodore Ts'o } 45462035e776STheodore Ts'o } 45472035e776STheodore Ts'o 45482035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 45492035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 45502035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 45512035e776STheodore Ts'o "using the ext4 subsystem"); 45522035e776STheodore Ts'o else { 45530d9366d6SEric Sandeen /* 45540d9366d6SEric Sandeen * If we're probing be silent, if this looks like 45550d9366d6SEric Sandeen * it's actually an ext4 filesystem. 45560d9366d6SEric Sandeen */ 45570d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 45580d9366d6SEric Sandeen goto failed_mount; 45592035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 45602035e776STheodore Ts'o "to feature incompatibilities"); 45612035e776STheodore Ts'o goto failed_mount; 45622035e776STheodore Ts'o } 45632035e776STheodore Ts'o } 45642035e776STheodore Ts'o 4565469108ffSTheodore Tso /* 4566ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4567ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4568ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4569ac27a0ecSDave Kleikamp */ 4570bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4571ac27a0ecSDave Kleikamp goto failed_mount; 4572a13fb1a4SEric Sandeen 45735b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 45745b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45755b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 45765b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 45775b9554dcSTheodore Ts'o goto failed_mount; 45785b9554dcSTheodore Ts'o } 45795b9554dcSTheodore Ts'o 4580bdd3c50dSChristoph Hellwig if (dax_supported(dax_dev, sb->s_bdev, blocksize, 0, 4581bdd3c50dSChristoph Hellwig bdev_nr_sectors(sb->s_bdev))) 4582a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4583a8ab6d38SIra Weiny 4584fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4585559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4586559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4587559db4c6SRoss Zwisler " that may contain inline data"); 4588361d24d4SEric Sandeen goto failed_mount; 4589559db4c6SRoss Zwisler } 4590a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 459124f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4592361d24d4SEric Sandeen "DAX unsupported by block device."); 4593361d24d4SEric Sandeen goto failed_mount; 459424f3478dSDan Williams } 4595923ae0ffSRoss Zwisler } 4596923ae0ffSRoss Zwisler 4597e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 45986ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 45996ddb2447STheodore Ts'o es->s_encryption_level); 46006ddb2447STheodore Ts'o goto failed_mount; 46016ddb2447STheodore Ts'o } 46026ddb2447STheodore Ts'o 4603ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4604afd09b61SAlexey Makhalov /* 4605afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4606afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4607afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4608afd09b61SAlexey Makhalov */ 4609afd09b61SAlexey Makhalov brelse(bh); 4610ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4611ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4612b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4613ce40733cSAneesh Kumar K.V blocksize); 4614afd09b61SAlexey Makhalov bh = NULL; 4615ac27a0ecSDave Kleikamp goto failed_mount; 4616ac27a0ecSDave Kleikamp } 4617ac27a0ecSDave Kleikamp 461870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 461970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 46208394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 46218394a6abSzhangyi (F) if (IS_ERR(bh)) { 4622b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4623b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 46248394a6abSzhangyi (F) ret = PTR_ERR(bh); 46258394a6abSzhangyi (F) bh = NULL; 4626ac27a0ecSDave Kleikamp goto failed_mount; 4627ac27a0ecSDave Kleikamp } 46282716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4629ac27a0ecSDave Kleikamp sbi->s_es = es; 4630617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4631b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4632b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4633ac27a0ecSDave Kleikamp goto failed_mount; 4634ac27a0ecSDave Kleikamp } 4635ac27a0ecSDave Kleikamp } 4636ac27a0ecSDave Kleikamp 4637e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4638f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4639f287a1a5STheodore Ts'o has_huge_files); 4640f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4641ac27a0ecSDave Kleikamp 46420d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4643e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 46448fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 46450d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4646d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4647b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4648b31e1552SEric Sandeen "unsupported descriptor size %lu", 46490d1ee42fSAlexandre Ratchov sbi->s_desc_size); 46500d1ee42fSAlexandre Ratchov goto failed_mount; 46510d1ee42fSAlexandre Ratchov } 46520d1ee42fSAlexandre Ratchov } else 46530d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 46540b8e58a1SAndreas Dilger 4655ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4656ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 46570b8e58a1SAndreas Dilger 4658617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4659ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4660617ba13bSMingming Cao goto cantfind_ext4; 4661cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4662cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4663cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4664b9c538daSJosh Triplett sbi->s_inodes_per_group); 4665cd6bb35bSTheodore Ts'o goto failed_mount; 4666cd6bb35bSTheodore Ts'o } 4667ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4668ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 46690d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4670ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4671ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4672e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4673e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 46740b8e58a1SAndreas Dilger 4675ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4676ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4677ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4678e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4679f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4680f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4681f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4682f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4683f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4684bc98a42cSDavid Howells if (!sb_rdonly(sb)) 468523301410STheodore Ts'o es->s_flags |= 468623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4687f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4688f99b2589STheodore Ts'o #else 4689bc98a42cSDavid Howells if (!sb_rdonly(sb)) 469023301410STheodore Ts'o es->s_flags |= 469123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4692f99b2589STheodore Ts'o #endif 4693f99b2589STheodore Ts'o } 469423301410STheodore Ts'o } 4695ac27a0ecSDave Kleikamp 4696281b5995STheodore Ts'o /* Handle clustersize */ 4697281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4698ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4699281b5995STheodore Ts'o if (clustersize < blocksize) { 4700281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4701281b5995STheodore Ts'o "cluster size (%d) smaller than " 4702281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4703281b5995STheodore Ts'o goto failed_mount; 4704281b5995STheodore Ts'o } 4705281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4706281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4707281b5995STheodore Ts'o sbi->s_clusters_per_group = 4708281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4709281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4710281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4711281b5995STheodore Ts'o "#clusters per group too big: %lu", 4712281b5995STheodore Ts'o sbi->s_clusters_per_group); 4713281b5995STheodore Ts'o goto failed_mount; 4714281b5995STheodore Ts'o } 4715281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4716281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4717281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4718281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4719281b5995STheodore Ts'o sbi->s_blocks_per_group, 4720281b5995STheodore Ts'o sbi->s_clusters_per_group); 4721281b5995STheodore Ts'o goto failed_mount; 4722281b5995STheodore Ts'o } 4723281b5995STheodore Ts'o } else { 4724281b5995STheodore Ts'o if (clustersize != blocksize) { 4725bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4726bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4727bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4728bfe0a5f4STheodore Ts'o goto failed_mount; 4729281b5995STheodore Ts'o } 4730ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4731b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4732b31e1552SEric Sandeen "#blocks per group too big: %lu", 4733ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4734ac27a0ecSDave Kleikamp goto failed_mount; 4735ac27a0ecSDave Kleikamp } 4736281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4737281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4738281b5995STheodore Ts'o } 4739281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4740281b5995STheodore Ts'o 4741960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4742960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4743960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4744960fd856STheodore Ts'o 4745bf43d84bSEric Sandeen /* 4746bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4747bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4748bf43d84bSEric Sandeen */ 47495a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 475030ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 47515a9ae68aSDarrick J. Wong if (err) { 4752b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4753bf43d84bSEric Sandeen " too large to mount safely on this system"); 4754ac27a0ecSDave Kleikamp goto failed_mount; 4755ac27a0ecSDave Kleikamp } 4756ac27a0ecSDave Kleikamp 4757617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4758617ba13bSMingming Cao goto cantfind_ext4; 4759e7c95593SEric Sandeen 47600f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 47615513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 47620f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4763b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4764b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 47650f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 47660f2ddca6SFrom: Thiemo Nagel goto failed_mount; 47670f2ddca6SFrom: Thiemo Nagel } 47680f2ddca6SFrom: Thiemo Nagel 47694ec11028STheodore Ts'o /* 47704ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 47714ec11028STheodore Ts'o * of the filesystem. 47724ec11028STheodore Ts'o */ 47734ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4774b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4775b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4776e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 47774ec11028STheodore Ts'o ext4_blocks_count(es)); 4778e7c95593SEric Sandeen goto failed_mount; 4779e7c95593SEric Sandeen } 4780bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4781bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4782bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4783bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4784bfe0a5f4STheodore Ts'o goto failed_mount; 4785bfe0a5f4STheodore Ts'o } 4786bfe0a5f4STheodore Ts'o 4787bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4788bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4789bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4790bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 47914ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4792df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 47934ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4794df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 47954ec11028STheodore Ts'o ext4_blocks_count(es), 47964ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 47974ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 47984ec11028STheodore Ts'o goto failed_mount; 47994ec11028STheodore Ts'o } 4800bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4801fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4802fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 48039e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 48049e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 48059e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 48069e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 48079e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 48089e463084STheodore Ts'o ret = -EINVAL; 48099e463084STheodore Ts'o goto failed_mount; 48109e463084STheodore Ts'o } 4811617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4812617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 48133a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 48142ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 48153a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 48163a4b77cdSEryu Guan "first meta block group too large: %u " 48173a4b77cdSEryu Guan "(group descriptor block count %u)", 48183a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 48193a4b77cdSEryu Guan goto failed_mount; 48203a4b77cdSEryu Guan } 48213a4b77cdSEryu Guan } 48221d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 48231d0c3924STheodore Ts'o kvmalloc_array(db_count, 4824f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 48251d0c3924STheodore Ts'o GFP_KERNEL)); 4826ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4827b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 48282cde417dSTheodore Ts'o ret = -ENOMEM; 4829ac27a0ecSDave Kleikamp goto failed_mount; 4830ac27a0ecSDave Kleikamp } 4831ac27a0ecSDave Kleikamp 4832705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4833ac27a0ecSDave Kleikamp 483485c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 483585c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 483685c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 48375df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 483885c8f176SAndrew Perepechko } 483985c8f176SAndrew Perepechko 4840ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 48411d0c3924STheodore Ts'o struct buffer_head *bh; 48421d0c3924STheodore Ts'o 484370bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 48448394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 48458394a6abSzhangyi (F) if (IS_ERR(bh)) { 4846b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4847b31e1552SEric Sandeen "can't read group descriptor %d", i); 4848ac27a0ecSDave Kleikamp db_count = i; 48498394a6abSzhangyi (F) ret = PTR_ERR(bh); 4850ac27a0ecSDave Kleikamp goto failed_mount2; 4851ac27a0ecSDave Kleikamp } 48521d0c3924STheodore Ts'o rcu_read_lock(); 48531d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 48541d0c3924STheodore Ts'o rcu_read_unlock(); 4855ac27a0ecSDave Kleikamp } 485644de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4857829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4858b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 48596a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4860f9ae9cf5STheodore Ts'o goto failed_mount2; 4861ac27a0ecSDave Kleikamp } 4862772cb7c8SJose R. Santos 4863235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 4864c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 4865c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 486604496411STao Ma 4867a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4868eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4869ce7e010aSTheodore Ts'o goto failed_mount3; 4870ce7e010aSTheodore Ts'o 4871c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 487267a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4873c9de560dSAlex Tomas 4874f9ae9cf5STheodore Ts'o /* 4875f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4876f9ae9cf5STheodore Ts'o */ 4877f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4878617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4879617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4880643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 4881a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4882ffcc4182SEric Biggers #endif 4883c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 4884c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 4885c93d8f88SEric Biggers #endif 4886ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4887617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4888e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 48891fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4890262b4662SJan Kara else 4891262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4892689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4893ac27a0ecSDave Kleikamp #endif 489485787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4895f2fa2ffcSAneesh Kumar K.V 4896ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 48973b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4898ac27a0ecSDave Kleikamp 4899aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 4900aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 4901aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_ineligible_updates, 0); 4902aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4903aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4904aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4905aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4906aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 49079b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 49089b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 4909aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 4910aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 49118016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 49128016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 49138016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 49148016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 49158016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 49168016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 49178016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4918aa75f4d3SHarshad Shirwadkar 4919ac27a0ecSDave Kleikamp sb->s_root = NULL; 4920ac27a0ecSDave Kleikamp 4921ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 492202f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 4923e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4924ac27a0ecSDave Kleikamp 4925bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4926c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 492750460fe8SDarrick J. Wong goto failed_mount3a; 4928c5e06d10SJohann Lombardi 4929ac27a0ecSDave Kleikamp /* 4930ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4931ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4932ac27a0ecSDave Kleikamp */ 4933e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 4934b237e304SHarshad Shirwadkar err = ext4_load_journal(sb, es, parsed_opts.journal_devnum); 49354753d8a2STheodore Ts'o if (err) 493650460fe8SDarrick J. Wong goto failed_mount3a; 4937bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4938e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4939b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4940b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4941744692dcSJiaying Zhang goto failed_mount_wq; 4942ac27a0ecSDave Kleikamp } else { 49431e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 49441e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 49451e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 49461e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 49471e381f60SDmitry Monakhov goto failed_mount_wq; 49481e381f60SDmitry Monakhov } 49491e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 49501e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 49511e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 49521e381f60SDmitry Monakhov goto failed_mount_wq; 49531e381f60SDmitry Monakhov } 49541e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 49551e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 49561e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 49571e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 49581e381f60SDmitry Monakhov goto failed_mount_wq; 49591e381f60SDmitry Monakhov } 49601e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 49611e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 49621e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 49631e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 49641e381f60SDmitry Monakhov goto failed_mount_wq; 49651e381f60SDmitry Monakhov } 496650b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 49671e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4968fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 4969995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 49700390131bSFrank Mayhar sbi->s_journal = NULL; 49710390131bSFrank Mayhar needs_recovery = 0; 49720390131bSFrank Mayhar goto no_journal; 4973ac27a0ecSDave Kleikamp } 4974ac27a0ecSDave Kleikamp 4975e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4976eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4977eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4978b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4979744692dcSJiaying Zhang goto failed_mount_wq; 4980eb40a09cSJose R. Santos } 4981eb40a09cSJose R. Santos 498225ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 498325ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 498425ed6e8aSDarrick J. Wong "feature set"); 498525ed6e8aSDarrick J. Wong goto failed_mount_wq; 4986d4da6c9cSLinus Torvalds } 4987818d276cSGirish Shilamkar 4988a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 4989a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4990a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 4991a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 4992a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 4993a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 4994a1e5e465SHarshad Shirwadkar } 4995a1e5e465SHarshad Shirwadkar 4996ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4997ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4998ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4999ac27a0ecSDave Kleikamp case 0: 5000ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 500163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 500263f57933SAndrew Morton * cope, else JOURNAL_DATA 500363f57933SAndrew Morton */ 5004dab291afSMingming Cao if (jbd2_journal_check_available_features 500527f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5006fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 500727f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 500827f394a7STyson Nottingham } else { 5009fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 501027f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 501127f394a7STyson Nottingham } 5012ac27a0ecSDave Kleikamp break; 5013ac27a0ecSDave Kleikamp 5014617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5015617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5016dab291afSMingming Cao if (!jbd2_journal_check_available_features 5017dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5018b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5019b31e1552SEric Sandeen "requested data journaling mode"); 5020744692dcSJiaying Zhang goto failed_mount_wq; 5021ac27a0ecSDave Kleikamp } 50225a150bdeSGustavo A. R. Silva break; 5023ac27a0ecSDave Kleikamp default: 5024ac27a0ecSDave Kleikamp break; 5025ac27a0ecSDave Kleikamp } 5026ab04df78SJan Kara 5027ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5028ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5029ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5030ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5031ab04df78SJan Kara goto failed_mount_wq; 5032ab04df78SJan Kara } 5033ab04df78SJan Kara 5034b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 5035ac27a0ecSDave Kleikamp 5036342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5037afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5038342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5039afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 504018aadd47SBobi Jam 5041ce7e010aSTheodore Ts'o no_journal: 5042cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 504347387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 504447387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5045cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5046cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 50479c191f70ST Makphaibulchoke goto failed_mount_wq; 50489c191f70ST Makphaibulchoke } 50499c191f70ST Makphaibulchoke 5050dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5051dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5052dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5053dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5054dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5055dec214d0STahsin Erdogan goto failed_mount_wq; 5056dec214d0STahsin Erdogan } 5057dec214d0STahsin Erdogan } 5058cdb7ee4cSTahsin Erdogan } 5059dec214d0STahsin Erdogan 5060c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5061c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5062c93d8f88SEric Biggers goto failed_mount_wq; 5063c93d8f88SEric Biggers } 5064c93d8f88SEric Biggers 5065bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 5066e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 5067e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 50684392fbc4SJan Kara ext4_commit_super(sb); 50696ddb2447STheodore Ts'o } 50706ddb2447STheodore Ts'o 5071fd89d5f2STejun Heo /* 5072952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5073952fc18eSTheodore Ts'o * superblock if present. 5074952fc18eSTheodore Ts'o */ 5075952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 5076952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 5077952fc18eSTheodore Ts'o else { 507807aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 507907aa2ea1SLukas Czerner if (err) 5080952fc18eSTheodore Ts'o goto failed_mount_wq; 5081952fc18eSTheodore Ts'o } 5082952fc18eSTheodore Ts'o 5083952fc18eSTheodore Ts'o /* 5084fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5085fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5086fd89d5f2STejun Heo */ 50872e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 50882e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 50892e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 50902e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 509107aa2ea1SLukas Czerner ret = -ENOMEM; 50922e8fa54eSJan Kara goto failed_mount4; 50932e8fa54eSJan Kara } 50942e8fa54eSJan Kara 5095ac27a0ecSDave Kleikamp /* 5096dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5097ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5098ac27a0ecSDave Kleikamp */ 5099ac27a0ecSDave Kleikamp 51008a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 51011d1fe1eeSDavid Howells if (IS_ERR(root)) { 5102b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 51031d1fe1eeSDavid Howells ret = PTR_ERR(root); 510432a9bb57SManish Katiyar root = NULL; 5105ac27a0ecSDave Kleikamp goto failed_mount4; 5106ac27a0ecSDave Kleikamp } 5107ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5108b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 510994bf608aSAl Viro iput(root); 5110ac27a0ecSDave Kleikamp goto failed_mount4; 5111ac27a0ecSDave Kleikamp } 5112b886ee3eSGabriel Krisman Bertazi 511348fde701SAl Viro sb->s_root = d_make_root(root); 51141d1fe1eeSDavid Howells if (!sb->s_root) { 5115b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 51161d1fe1eeSDavid Howells ret = -ENOMEM; 51171d1fe1eeSDavid Howells goto failed_mount4; 51181d1fe1eeSDavid Howells } 5119ac27a0ecSDave Kleikamp 5120c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5121c89128a0SJaegeuk Kim if (ret == -EROFS) { 51221751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5123c89128a0SJaegeuk Kim ret = 0; 5124c89128a0SJaegeuk Kim } else if (ret) 5125c89128a0SJaegeuk Kim goto failed_mount4a; 5126ef7f3835SKalpak Shah 5127b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 512827dd4385SLukas Czerner 51290f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 51306fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 51316fd058f7STheodore Ts'o if (err) { 5132b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5133fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5134f9ae9cf5STheodore Ts'o goto failed_mount4a; 5135f9ae9cf5STheodore Ts'o } 51360f5bde1dSJan Kara } 51378016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5138f9ae9cf5STheodore Ts'o 5139f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5140196e402aSHarshad Shirwadkar 5141196e402aSHarshad Shirwadkar /* 5142196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5143196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5144196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5145196e402aSHarshad Shirwadkar */ 5146196e402aSHarshad Shirwadkar if (parsed_opts.mb_optimize_scan == 1) 5147196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5148196e402aSHarshad Shirwadkar else if (parsed_opts.mb_optimize_scan == 0) 5149196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5150196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5151196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5152196e402aSHarshad Shirwadkar 5153f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5154f9ae9cf5STheodore Ts'o if (err) { 5155f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5156f9ae9cf5STheodore Ts'o err); 5157dcf2d804STao Ma goto failed_mount5; 5158c2774d84SAneesh Kumar K.V } 5159c2774d84SAneesh Kumar K.V 5160027f14f5STheodore Ts'o /* 5161027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5162027f14f5STheodore Ts'o * mballoc is initialized 5163027f14f5STheodore Ts'o */ 5164027f14f5STheodore Ts'o if (sbi->s_journal) 5165027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5166027f14f5STheodore Ts'o ext4_journal_commit_callback; 5167027f14f5STheodore Ts'o 5168d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5169d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5170d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5171908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5172908c7f19STejun Heo GFP_KERNEL); 5173d5e03cbbSTheodore Ts'o if (!err) { 5174d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5175d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5176908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5177908c7f19STejun Heo GFP_KERNEL); 5178d5e03cbbSTheodore Ts'o } 5179b2bbb92fSJan Kara /* 5180b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5181b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5182b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5183b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5184b2bbb92fSJan Kara * after it is mounted can fail. 5185b2bbb92fSJan Kara */ 5186b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5187d5e03cbbSTheodore Ts'o if (!err) 5188d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5189908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5190d5e03cbbSTheodore Ts'o if (!err) 5191908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5192908c7f19STejun Heo GFP_KERNEL); 5193c8585c6fSDaeho Jeong if (!err) 5194efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5195efc61345SEric Whitney GFP_KERNEL); 5196efc61345SEric Whitney if (!err) 5197bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5198c8585c6fSDaeho Jeong 5199d5e03cbbSTheodore Ts'o if (err) { 5200d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5201d5e03cbbSTheodore Ts'o goto failed_mount6; 5202d5e03cbbSTheodore Ts'o } 5203d5e03cbbSTheodore Ts'o 5204e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5205d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5206d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5207d5e03cbbSTheodore Ts'o "unable to initialize " 5208d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 52098f6840c4SYang Yingliang ret = -ENOMEM; 5210d5e03cbbSTheodore Ts'o goto failed_mount6; 5211d5e03cbbSTheodore Ts'o } 5212d5e03cbbSTheodore Ts'o 5213bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5214bfff6873SLukas Czerner if (err) 5215dcf2d804STao Ma goto failed_mount6; 5216bfff6873SLukas Czerner 5217b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5218dcf2d804STao Ma if (err) 5219dcf2d804STao Ma goto failed_mount7; 52203197ebdbSTheodore Ts'o 522102f310fcSJan Kara err = ext4_init_orphan_info(sb); 522202f310fcSJan Kara if (err) 522302f310fcSJan Kara goto failed_mount8; 52249b2ff357SJan Kara #ifdef CONFIG_QUOTA 52259b2ff357SJan Kara /* Enable quota usage during mount. */ 5226bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 52279b2ff357SJan Kara err = ext4_enable_quotas(sb); 52289b2ff357SJan Kara if (err) 522902f310fcSJan Kara goto failed_mount9; 52309b2ff357SJan Kara } 52319b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 52329b2ff357SJan Kara 5233bc71726cSzhangyi (F) /* 5234bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5235bc71726cSzhangyi (F) * used to detect the metadata async write error. 5236bc71726cSzhangyi (F) */ 5237bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5238bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5239bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5240bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5241617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5242617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5243617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 52440390131bSFrank Mayhar if (needs_recovery) { 5245b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 524611215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 524711215630SJan Kara if (err) 524802f310fcSJan Kara goto failed_mount9; 52490390131bSFrank Mayhar } 52500390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 52510390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 52520390131bSFrank Mayhar descr = " journalled data mode"; 52530390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 52540390131bSFrank Mayhar descr = " ordered data mode"; 52550390131bSFrank Mayhar else 52560390131bSFrank Mayhar descr = " writeback data mode"; 52570390131bSFrank Mayhar } else 52580390131bSFrank Mayhar descr = "out journal"; 52590390131bSFrank Mayhar 526079add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 526179add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 526279add3a3SLukas Czerner if (!blk_queue_discard(q)) 526379add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 526479add3a3SLukas Czerner "mounting with \"discard\" option, but " 526579add3a3SLukas Czerner "the device does not support discard"); 526679add3a3SLukas Czerner } 526779add3a3SLukas Czerner 5268e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 5269d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5270ca9b404fSRoman Anufriev "Opts: %.*s%s%s. Quota mode: %s.", descr, 52715aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 52725aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 5273ca9b404fSRoman Anufriev *sbi->s_es->s_mount_opts ? "; " : "", orig_data, 5274ca9b404fSRoman Anufriev ext4_quota_mode(sb)); 5275ac27a0ecSDave Kleikamp 527666e61a9eSTheodore Ts'o if (es->s_error_count) 527766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5278ac27a0ecSDave Kleikamp 5279efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5280efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5281efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5282efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 52831cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 52841cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5285efbed4dcSTheodore Ts'o 5286d4c402d9SCurt Wohlgemuth kfree(orig_data); 5287ac27a0ecSDave Kleikamp return 0; 5288ac27a0ecSDave Kleikamp 5289617ba13bSMingming Cao cantfind_ext4: 5290ac27a0ecSDave Kleikamp if (!silent) 5291b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5292ac27a0ecSDave Kleikamp goto failed_mount; 5293ac27a0ecSDave Kleikamp 529402f310fcSJan Kara failed_mount9: 529502f310fcSJan Kara ext4_release_orphan_info(sb); 529672ba7450STheodore Ts'o failed_mount8: 5297ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5298cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5299dcf2d804STao Ma failed_mount7: 5300dcf2d804STao Ma ext4_unregister_li_request(sb); 5301dcf2d804STao Ma failed_mount6: 5302f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 53037c990728SSuraj Jitindar Singh rcu_read_lock(); 53047c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 53057c990728SSuraj Jitindar Singh if (flex_groups) { 53067c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 53077c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 53087c990728SSuraj Jitindar Singh kvfree(flex_groups); 53097c990728SSuraj Jitindar Singh } 53107c990728SSuraj Jitindar Singh rcu_read_unlock(); 5311d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5312d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5313d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5314d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5315efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5316bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 531700764937SAzat Khuzhin failed_mount5: 5318f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5319f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5320f9ae9cf5STheodore Ts'o failed_mount4a: 532194bf608aSAl Viro dput(sb->s_root); 532232a9bb57SManish Katiyar sb->s_root = NULL; 532394bf608aSAl Viro failed_mount4: 5324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 53252e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 53262e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 53274c0425ffSMingming Cao failed_mount_wq: 5328dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5329dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 533050c15df6SChengguang Xu 533147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 533247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 533350c15df6SChengguang Xu 53340390131bSFrank Mayhar if (sbi->s_journal) { 5335bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5336bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5337dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 533847b4a50bSJan Kara sbi->s_journal = NULL; 53390390131bSFrank Mayhar } 534050460fe8SDarrick J. Wong failed_mount3a: 5341d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5342eb68d0e2SZheng Liu failed_mount3: 5343bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5344c92dc856SJan Kara flush_work(&sbi->s_error_work); 53452a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5346618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5347ac27a0ecSDave Kleikamp failed_mount2: 53481d0c3924STheodore Ts'o rcu_read_lock(); 53491d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5350ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 53511d0c3924STheodore Ts'o brelse(group_desc[i]); 53521d0c3924STheodore Ts'o kvfree(group_desc); 53531d0c3924STheodore Ts'o rcu_read_unlock(); 5354ac27a0ecSDave Kleikamp failed_mount: 53550441984aSDarrick J. Wong if (sbi->s_chksum_driver) 53560441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5357c83ad55eSGabriel Krisman Bertazi 5358c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5359f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5360c83ad55eSGabriel Krisman Bertazi #endif 5361c83ad55eSGabriel Krisman Bertazi 5362ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5363a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 53640ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5365ac27a0ecSDave Kleikamp #endif 5366ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5367afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5368ac27a0ecSDave Kleikamp brelse(bh); 5369afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5370ac27a0ecSDave Kleikamp out_fail: 5371ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5372f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 53735aee0f8aSTheodore Ts'o out_free_base: 5374ac27a0ecSDave Kleikamp kfree(sbi); 5375d4c402d9SCurt Wohlgemuth kfree(orig_data); 53765e405595SDan Williams fs_put_dax(dax_dev); 537707aa2ea1SLukas Czerner return err ? err : ret; 5378ac27a0ecSDave Kleikamp } 5379ac27a0ecSDave Kleikamp 5380ac27a0ecSDave Kleikamp /* 5381ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5382ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5383ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5384ac27a0ecSDave Kleikamp */ 5385617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5386ac27a0ecSDave Kleikamp { 5387617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5388ac27a0ecSDave Kleikamp 5389ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 539030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 539130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 53926866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5393ac27a0ecSDave Kleikamp 5394a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5395ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5396dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5397ac27a0ecSDave Kleikamp else 5398dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 53995bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 54005bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 54015bf5683aSHidehiro Kawai else 54025bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5403a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5404ac27a0ecSDave Kleikamp } 5405ac27a0ecSDave Kleikamp 5406c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5407ac27a0ecSDave Kleikamp unsigned int journal_inum) 5408ac27a0ecSDave Kleikamp { 5409ac27a0ecSDave Kleikamp struct inode *journal_inode; 5410ac27a0ecSDave Kleikamp 5411c6cb7e77SEric Whitney /* 5412c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5413c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5414c6cb7e77SEric Whitney * will try to delete it. 5415c6cb7e77SEric Whitney */ 54168a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 54171d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5418b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5419ac27a0ecSDave Kleikamp return NULL; 5420ac27a0ecSDave Kleikamp } 5421ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5422ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5423ac27a0ecSDave Kleikamp iput(journal_inode); 5424b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5425ac27a0ecSDave Kleikamp return NULL; 5426ac27a0ecSDave Kleikamp } 5427ac27a0ecSDave Kleikamp 5428e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5429ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 54301d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5431b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5432ac27a0ecSDave Kleikamp iput(journal_inode); 5433ac27a0ecSDave Kleikamp return NULL; 5434ac27a0ecSDave Kleikamp } 5435c6cb7e77SEric Whitney return journal_inode; 5436c6cb7e77SEric Whitney } 5437c6cb7e77SEric Whitney 5438c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5439c6cb7e77SEric Whitney unsigned int journal_inum) 5440c6cb7e77SEric Whitney { 5441c6cb7e77SEric Whitney struct inode *journal_inode; 5442c6cb7e77SEric Whitney journal_t *journal; 5443c6cb7e77SEric Whitney 544411215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 544511215630SJan Kara return NULL; 5446c6cb7e77SEric Whitney 5447c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5448c6cb7e77SEric Whitney if (!journal_inode) 5449c6cb7e77SEric Whitney return NULL; 5450ac27a0ecSDave Kleikamp 5451dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5452ac27a0ecSDave Kleikamp if (!journal) { 5453b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5454ac27a0ecSDave Kleikamp iput(journal_inode); 5455ac27a0ecSDave Kleikamp return NULL; 5456ac27a0ecSDave Kleikamp } 5457ac27a0ecSDave Kleikamp journal->j_private = sb; 5458617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5459ac27a0ecSDave Kleikamp return journal; 5460ac27a0ecSDave Kleikamp } 5461ac27a0ecSDave Kleikamp 5462617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5463ac27a0ecSDave Kleikamp dev_t j_dev) 5464ac27a0ecSDave Kleikamp { 5465ac27a0ecSDave Kleikamp struct buffer_head *bh; 5466ac27a0ecSDave Kleikamp journal_t *journal; 5467617ba13bSMingming Cao ext4_fsblk_t start; 5468617ba13bSMingming Cao ext4_fsblk_t len; 5469ac27a0ecSDave Kleikamp int hblock, blocksize; 5470617ba13bSMingming Cao ext4_fsblk_t sb_block; 5471ac27a0ecSDave Kleikamp unsigned long offset; 5472617ba13bSMingming Cao struct ext4_super_block *es; 5473ac27a0ecSDave Kleikamp struct block_device *bdev; 5474ac27a0ecSDave Kleikamp 547511215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 547611215630SJan Kara return NULL; 54770390131bSFrank Mayhar 5478b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5479ac27a0ecSDave Kleikamp if (bdev == NULL) 5480ac27a0ecSDave Kleikamp return NULL; 5481ac27a0ecSDave Kleikamp 5482ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5483e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5484ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5485b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5486b31e1552SEric Sandeen "blocksize too small for journal device"); 5487ac27a0ecSDave Kleikamp goto out_bdev; 5488ac27a0ecSDave Kleikamp } 5489ac27a0ecSDave Kleikamp 5490617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5491617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5492ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5493ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5494b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5495b31e1552SEric Sandeen "external journal"); 5496ac27a0ecSDave Kleikamp goto out_bdev; 5497ac27a0ecSDave Kleikamp } 5498ac27a0ecSDave Kleikamp 54992716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5500617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5501ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5502617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5503b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5504b31e1552SEric Sandeen "bad superblock"); 5505ac27a0ecSDave Kleikamp brelse(bh); 5506ac27a0ecSDave Kleikamp goto out_bdev; 5507ac27a0ecSDave Kleikamp } 5508ac27a0ecSDave Kleikamp 5509df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5510df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5511df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5512df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5513df4763beSDarrick J. Wong "corrupt superblock"); 5514df4763beSDarrick J. Wong brelse(bh); 5515df4763beSDarrick J. Wong goto out_bdev; 5516df4763beSDarrick J. Wong } 5517df4763beSDarrick J. Wong 5518617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5519b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5520ac27a0ecSDave Kleikamp brelse(bh); 5521ac27a0ecSDave Kleikamp goto out_bdev; 5522ac27a0ecSDave Kleikamp } 5523ac27a0ecSDave Kleikamp 5524bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5525ac27a0ecSDave Kleikamp start = sb_block + 1; 5526ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5527ac27a0ecSDave Kleikamp 5528dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5529ac27a0ecSDave Kleikamp start, len, blocksize); 5530ac27a0ecSDave Kleikamp if (!journal) { 5531b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5532ac27a0ecSDave Kleikamp goto out_bdev; 5533ac27a0ecSDave Kleikamp } 5534ac27a0ecSDave Kleikamp journal->j_private = sb; 55352d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5536b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5537ac27a0ecSDave Kleikamp goto out_journal; 5538ac27a0ecSDave Kleikamp } 5539ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5540b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5541b31e1552SEric Sandeen "user (unsupported) - %d", 5542ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5543ac27a0ecSDave Kleikamp goto out_journal; 5544ac27a0ecSDave Kleikamp } 5545ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5546617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5547ac27a0ecSDave Kleikamp return journal; 55480b8e58a1SAndreas Dilger 5549ac27a0ecSDave Kleikamp out_journal: 5550dab291afSMingming Cao jbd2_journal_destroy(journal); 5551ac27a0ecSDave Kleikamp out_bdev: 5552617ba13bSMingming Cao ext4_blkdev_put(bdev); 5553ac27a0ecSDave Kleikamp return NULL; 5554ac27a0ecSDave Kleikamp } 5555ac27a0ecSDave Kleikamp 5556617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5557617ba13bSMingming Cao struct ext4_super_block *es, 5558ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5559ac27a0ecSDave Kleikamp { 5560ac27a0ecSDave Kleikamp journal_t *journal; 5561ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5562ac27a0ecSDave Kleikamp dev_t journal_dev; 5563ac27a0ecSDave Kleikamp int err = 0; 5564ac27a0ecSDave Kleikamp int really_read_only; 5565273108faSLukas Czerner int journal_dev_ro; 5566ac27a0ecSDave Kleikamp 556711215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 556811215630SJan Kara return -EFSCORRUPTED; 55690390131bSFrank Mayhar 5570ac27a0ecSDave Kleikamp if (journal_devnum && 5571ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5572b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5573b31e1552SEric Sandeen "numbers have changed"); 5574ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5575ac27a0ecSDave Kleikamp } else 5576ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5577ac27a0ecSDave Kleikamp 5578273108faSLukas Czerner if (journal_inum && journal_dev) { 5579273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5580273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5581273108faSLukas Czerner return -EINVAL; 5582273108faSLukas Czerner } 5583273108faSLukas Czerner 5584273108faSLukas Czerner if (journal_inum) { 5585273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5586273108faSLukas Czerner if (!journal) 5587273108faSLukas Czerner return -EINVAL; 5588273108faSLukas Czerner } else { 5589273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5590273108faSLukas Czerner if (!journal) 5591273108faSLukas Czerner return -EINVAL; 5592273108faSLukas Czerner } 5593273108faSLukas Czerner 5594273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5595273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5596273108faSLukas Czerner 5597273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5598273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5599273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5600273108faSLukas Czerner err = -EROFS; 5601273108faSLukas Czerner goto err_out; 5602273108faSLukas Czerner } 5603ac27a0ecSDave Kleikamp 5604ac27a0ecSDave Kleikamp /* 5605ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5606ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5607ac27a0ecSDave Kleikamp * can get read-write access to the device. 5608ac27a0ecSDave Kleikamp */ 5609e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5610bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5611b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5612b31e1552SEric Sandeen "required on readonly filesystem"); 5613ac27a0ecSDave Kleikamp if (really_read_only) { 5614b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5615d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5616d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5617273108faSLukas Czerner err = -EROFS; 5618273108faSLukas Czerner goto err_out; 5619ac27a0ecSDave Kleikamp } 5620b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5621b31e1552SEric Sandeen "be enabled during recovery"); 5622ac27a0ecSDave Kleikamp } 5623ac27a0ecSDave Kleikamp } 5624ac27a0ecSDave Kleikamp 562590576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5626b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 56274776004fSTheodore Ts'o 5628e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5629dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 56301c13d5c0STheodore Ts'o if (!err) { 56311c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 56321c13d5c0STheodore Ts'o if (save) 56331c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 56341c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5635dab291afSMingming Cao err = jbd2_journal_load(journal); 56361c13d5c0STheodore Ts'o if (save) 56371c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 56381c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 56391c13d5c0STheodore Ts'o kfree(save); 56401c13d5c0STheodore Ts'o } 5641ac27a0ecSDave Kleikamp 5642ac27a0ecSDave Kleikamp if (err) { 5643b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5644273108faSLukas Czerner goto err_out; 5645ac27a0ecSDave Kleikamp } 5646ac27a0ecSDave Kleikamp 5647617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 564811215630SJan Kara err = ext4_clear_journal_err(sb, es); 564911215630SJan Kara if (err) { 565011215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 565111215630SJan Kara jbd2_journal_destroy(journal); 565211215630SJan Kara return err; 565311215630SJan Kara } 5654ac27a0ecSDave Kleikamp 5655c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5656ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5657ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5658ac27a0ecSDave Kleikamp 5659ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 56604392fbc4SJan Kara ext4_commit_super(sb); 5661ac27a0ecSDave Kleikamp } 5662ac27a0ecSDave Kleikamp 5663ac27a0ecSDave Kleikamp return 0; 5664273108faSLukas Czerner 5665273108faSLukas Czerner err_out: 5666273108faSLukas Czerner jbd2_journal_destroy(journal); 5667273108faSLukas Czerner return err; 5668ac27a0ecSDave Kleikamp } 5669ac27a0ecSDave Kleikamp 56702d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 56712d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5672ac27a0ecSDave Kleikamp { 5673c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5674e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5675e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5676ac27a0ecSDave Kleikamp 567705c2c00fSJan Kara lock_buffer(sbh); 5678a17712c8SJon Derrick /* 567971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 568071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 568171290b36STheodore Ts'o * write time when we are mounting the root file system 568271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 568371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 568471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 568571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 568671290b36STheodore Ts'o * to complain and force a full file system check. 568771290b36STheodore Ts'o */ 56881751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 56896a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5690afc32f7eSTheodore Ts'o es->s_kbytes_written = 5691e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 56928446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5693e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5694e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 569557042651STheodore Ts'o ext4_free_blocks_count_set(es, 5696e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5697e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5698e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 56997f93cff9STheodore Ts'o es->s_free_inodes_count = 57007f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5701e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5702c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5703c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5704c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5705c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5706c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5707c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5708c92dc856SJan Kara &es->s_first_error_time_hi, 5709c92dc856SJan Kara sbi->s_first_error_time); 5710c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5711c92dc856SJan Kara sizeof(es->s_first_error_func)); 5712c92dc856SJan Kara es->s_first_error_line = 5713c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5714c92dc856SJan Kara es->s_first_error_ino = 5715c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5716c92dc856SJan Kara es->s_first_error_block = 5717c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5718c92dc856SJan Kara es->s_first_error_errcode = 5719c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5720c92dc856SJan Kara } 5721c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5722c92dc856SJan Kara &es->s_last_error_time_hi, 5723c92dc856SJan Kara sbi->s_last_error_time); 5724c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5725c92dc856SJan Kara sizeof(es->s_last_error_func)); 5726c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5727c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5728c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5729c92dc856SJan Kara es->s_last_error_errcode = 5730c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5731c92dc856SJan Kara /* 5732c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5733c92dc856SJan Kara * started already 5734c92dc856SJan Kara */ 5735c92dc856SJan Kara if (!es->s_error_count) 5736c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5737c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5738c92dc856SJan Kara sbi->s_add_error_count = 0; 5739c92dc856SJan Kara } 5740c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5741c92dc856SJan Kara 574206db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 57432d01ddc8SJan Kara unlock_buffer(sbh); 57442d01ddc8SJan Kara } 57452d01ddc8SJan Kara 57462d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 57472d01ddc8SJan Kara { 57482d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 57492d01ddc8SJan Kara int error = 0; 57502d01ddc8SJan Kara 5751f88f1466SFengnan Chang if (!sbh) 5752f88f1466SFengnan Chang return -EINVAL; 5753f88f1466SFengnan Chang if (block_device_ejected(sb)) 5754f88f1466SFengnan Chang return -ENODEV; 57552d01ddc8SJan Kara 57562d01ddc8SJan Kara ext4_update_super(sb); 57572d01ddc8SJan Kara 5758e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 57594743f839SPranay Kr. Srivastava /* 57604743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 57614743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 57624743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 57634743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 57644743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 57654743f839SPranay Kr. Srivastava * write and hope for the best. 57664743f839SPranay Kr. Srivastava */ 57674743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 57684743f839SPranay Kr. Srivastava "superblock detected"); 57694743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 57704743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 57714743f839SPranay Kr. Srivastava } 57722d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 5773ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5774564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 577500473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5776c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5777b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5778b31e1552SEric Sandeen "superblock"); 5779914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5780914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5781914258bfSTheodore Ts'o } 5782c4be0c1dSTakashi Sato return error; 5783ac27a0ecSDave Kleikamp } 5784ac27a0ecSDave Kleikamp 5785ac27a0ecSDave Kleikamp /* 5786ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5787ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5788ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5789ac27a0ecSDave Kleikamp */ 579011215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5791617ba13bSMingming Cao struct ext4_super_block *es) 5792ac27a0ecSDave Kleikamp { 579311215630SJan Kara int err; 5794617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5795ac27a0ecSDave Kleikamp 5796e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 579711215630SJan Kara if (journal != NULL) { 579811215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 579911215630SJan Kara "mounted!"); 580011215630SJan Kara return -EFSCORRUPTED; 580111215630SJan Kara } 580211215630SJan Kara return 0; 58030390131bSFrank Mayhar } 5804dab291afSMingming Cao jbd2_journal_lock_updates(journal); 580501d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 580611215630SJan Kara if (err < 0) 58077ffe1ea8SHidehiro Kawai goto out; 58087ffe1ea8SHidehiro Kawai 580902f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 581002f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 581102f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 581202f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 581302f310fcSJan Kara err = -EFSCORRUPTED; 581402f310fcSJan Kara goto out; 581502f310fcSJan Kara } 5816e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 581702f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 58184392fbc4SJan Kara ext4_commit_super(sb); 5819ac27a0ecSDave Kleikamp } 58207ffe1ea8SHidehiro Kawai out: 5821dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 582211215630SJan Kara return err; 5823ac27a0ecSDave Kleikamp } 5824ac27a0ecSDave Kleikamp 5825ac27a0ecSDave Kleikamp /* 5826ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5827ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 5828ac27a0ecSDave Kleikamp * main filesystem now. 5829ac27a0ecSDave Kleikamp */ 583011215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 5831617ba13bSMingming Cao struct ext4_super_block *es) 5832ac27a0ecSDave Kleikamp { 5833ac27a0ecSDave Kleikamp journal_t *journal; 5834ac27a0ecSDave Kleikamp int j_errno; 5835ac27a0ecSDave Kleikamp const char *errstr; 5836ac27a0ecSDave Kleikamp 583711215630SJan Kara if (!ext4_has_feature_journal(sb)) { 583811215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 583911215630SJan Kara return -EFSCORRUPTED; 584011215630SJan Kara } 58410390131bSFrank Mayhar 5842617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5843ac27a0ecSDave Kleikamp 5844ac27a0ecSDave Kleikamp /* 5845ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 5846617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 5847ac27a0ecSDave Kleikamp */ 5848ac27a0ecSDave Kleikamp 5849dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 5850ac27a0ecSDave Kleikamp if (j_errno) { 5851ac27a0ecSDave Kleikamp char nbuf[16]; 5852ac27a0ecSDave Kleikamp 5853617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 585412062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 5855ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 585612062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 5857ac27a0ecSDave Kleikamp 5858617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5859617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 58604392fbc4SJan Kara ext4_commit_super(sb); 5861ac27a0ecSDave Kleikamp 5862dab291afSMingming Cao jbd2_journal_clear_err(journal); 5863d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 5864ac27a0ecSDave Kleikamp } 586511215630SJan Kara return 0; 5866ac27a0ecSDave Kleikamp } 5867ac27a0ecSDave Kleikamp 5868ac27a0ecSDave Kleikamp /* 5869ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 5870ac27a0ecSDave Kleikamp * and wait on the commit. 5871ac27a0ecSDave Kleikamp */ 5872617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 5873ac27a0ecSDave Kleikamp { 5874ac27a0ecSDave Kleikamp journal_t *journal; 5875ac27a0ecSDave Kleikamp 5876bc98a42cSDavid Howells if (sb_rdonly(sb)) 5877ac27a0ecSDave Kleikamp return 0; 5878ac27a0ecSDave Kleikamp 5879617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5880b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 5881ac27a0ecSDave Kleikamp } 5882ac27a0ecSDave Kleikamp 5883617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 5884ac27a0ecSDave Kleikamp { 588514ce0cb4STheodore Ts'o int ret = 0; 58869eddacf9SJan Kara tid_t target; 588706a407f1SDmitry Monakhov bool needs_barrier = false; 58888d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5889ac27a0ecSDave Kleikamp 589049598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 58910db1ff22STheodore Ts'o return 0; 58920db1ff22STheodore Ts'o 58939bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 58942e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 5895a1177825SJan Kara /* 5896a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 5897a1177825SJan Kara * no dirty dquots 5898a1177825SJan Kara */ 5899a1177825SJan Kara dquot_writeback_dquots(sb, -1); 590006a407f1SDmitry Monakhov /* 590106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 590206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 590306a407f1SDmitry Monakhov * transaction_commit will do it for us. 590406a407f1SDmitry Monakhov */ 5905bda32530STheodore Ts'o if (sbi->s_journal) { 590606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 590706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 590806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 590906a407f1SDmitry Monakhov needs_barrier = true; 591006a407f1SDmitry Monakhov 59118d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 5912ac27a0ecSDave Kleikamp if (wait) 5913bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 5914bda32530STheodore Ts'o target); 59150390131bSFrank Mayhar } 5916bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5917bda32530STheodore Ts'o needs_barrier = true; 591806a407f1SDmitry Monakhov if (needs_barrier) { 591906a407f1SDmitry Monakhov int err; 5920c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 592106a407f1SDmitry Monakhov if (!ret) 592206a407f1SDmitry Monakhov ret = err; 592306a407f1SDmitry Monakhov } 592406a407f1SDmitry Monakhov 592506a407f1SDmitry Monakhov return ret; 592606a407f1SDmitry Monakhov } 592706a407f1SDmitry Monakhov 5928ac27a0ecSDave Kleikamp /* 5929ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5930ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5931be4f27d3SYongqiang Yang * 5932be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 59338e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 59348e8ad8a5SJan Kara * modifications. 5935ac27a0ecSDave Kleikamp */ 5936c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5937ac27a0ecSDave Kleikamp { 5938c4be0c1dSTakashi Sato int error = 0; 5939c4be0c1dSTakashi Sato journal_t *journal; 5940ac27a0ecSDave Kleikamp 5941bc98a42cSDavid Howells if (sb_rdonly(sb)) 59429ca92389STheodore Ts'o return 0; 59439ca92389STheodore Ts'o 5944c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5945ac27a0ecSDave Kleikamp 5946bb044576STheodore Ts'o if (journal) { 5947ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5948dab291afSMingming Cao jbd2_journal_lock_updates(journal); 59497ffe1ea8SHidehiro Kawai 59507ffe1ea8SHidehiro Kawai /* 5951bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5952bb044576STheodore Ts'o * flush the journal. 59537ffe1ea8SHidehiro Kawai */ 595401d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 59556b0310fbSEric Sandeen if (error < 0) 59566b0310fbSEric Sandeen goto out; 5957ac27a0ecSDave Kleikamp 5958ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5959e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 596002f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 596102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 5962c642dc9eSEric Sandeen } 5963c642dc9eSEric Sandeen 59644392fbc4SJan Kara error = ext4_commit_super(sb); 59656b0310fbSEric Sandeen out: 5966bb044576STheodore Ts'o if (journal) 59678e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5968bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 59696b0310fbSEric Sandeen return error; 5970ac27a0ecSDave Kleikamp } 5971ac27a0ecSDave Kleikamp 5972ac27a0ecSDave Kleikamp /* 5973ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5974ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5975ac27a0ecSDave Kleikamp */ 5976c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5977ac27a0ecSDave Kleikamp { 5978bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 59799ca92389STheodore Ts'o return 0; 59809ca92389STheodore Ts'o 5981c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 59829ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5983e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 598402f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 598502f310fcSJan Kara ext4_set_feature_orphan_present(sb); 5986c642dc9eSEric Sandeen } 5987c642dc9eSEric Sandeen 59884392fbc4SJan Kara ext4_commit_super(sb); 5989c4be0c1dSTakashi Sato return 0; 5990ac27a0ecSDave Kleikamp } 5991ac27a0ecSDave Kleikamp 5992673c6100STheodore Ts'o /* 5993673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5994673c6100STheodore Ts'o */ 5995673c6100STheodore Ts'o struct ext4_mount_options { 5996673c6100STheodore Ts'o unsigned long s_mount_opt; 5997a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 599808cefc7aSEric W. Biederman kuid_t s_resuid; 599908cefc7aSEric W. Biederman kgid_t s_resgid; 6000673c6100STheodore Ts'o unsigned long s_commit_interval; 6001673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6002673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6003673c6100STheodore Ts'o int s_jquota_fmt; 6004a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6005673c6100STheodore Ts'o #endif 6006673c6100STheodore Ts'o }; 6007673c6100STheodore Ts'o 6008617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 6009ac27a0ecSDave Kleikamp { 6010617ba13bSMingming Cao struct ext4_super_block *es; 6011617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6012f25391ebSLukas Czerner unsigned long old_sb_flags, vfs_flags; 6013617ba13bSMingming Cao struct ext4_mount_options old_opts; 60148a266467STheodore Ts'o ext4_group_t g; 6015c5e06d10SJohann Lombardi int err = 0; 6016ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 60173bbef91bSAustin Kim int enable_quota = 0; 601803dafb5fSChen Gang int i, j; 601933458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6020ac27a0ecSDave Kleikamp #endif 6021d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 6022461c3af0SLukas Czerner struct ext4_fs_context parsed_opts; 6023b237e304SHarshad Shirwadkar 6024b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6025b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 6026ac27a0ecSDave Kleikamp 602721ac738eSChengguang Xu if (data && !orig_data) 602821ac738eSChengguang Xu return -ENOMEM; 602921ac738eSChengguang Xu 6030ac27a0ecSDave Kleikamp /* Store the original options */ 6031ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6032ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6033a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6034ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6035ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6036ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 603730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 603830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6039ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6040ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6041a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 604203dafb5fSChen Gang if (sbi->s_qf_names[i]) { 604333458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 604433458eabSTheodore Ts'o 604533458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 604603dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 604703dafb5fSChen Gang for (j = 0; j < i; j++) 604803dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 60493e36a163SWei Yongjun kfree(orig_data); 605003dafb5fSChen Gang return -ENOMEM; 605103dafb5fSChen Gang } 605203dafb5fSChen Gang } else 605303dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6054ac27a0ecSDave Kleikamp #endif 6055b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 6056b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = 6057b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6058ac27a0ecSDave Kleikamp 6059f25391ebSLukas Czerner /* 6060f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6061f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6062f25391ebSLukas Czerner * s_flags. Copy those selected flags from *flags to s_flags 6063f25391ebSLukas Czerner */ 6064f25391ebSLukas Czerner vfs_flags = SB_LAZYTIME | SB_I_VERSION; 6065f25391ebSLukas Czerner sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags); 6066f25391ebSLukas Czerner 6067b237e304SHarshad Shirwadkar if (!parse_options(data, sb, &parsed_opts, 1)) { 6068ac27a0ecSDave Kleikamp err = -EINVAL; 6069ac27a0ecSDave Kleikamp goto restore_opts; 6070ac27a0ecSDave Kleikamp } 6071ac27a0ecSDave Kleikamp 60726b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 60736b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 60746b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 60752d5b86e0SEric Sandeen "during remount not supported; ignoring"); 60762d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6077c6d3d56dSDarrick J. Wong } 6078c6d3d56dSDarrick J. Wong 60796ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 60806ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 60816ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 60826ae6514bSPiotr Sarna "both data=journal and delalloc"); 60836ae6514bSPiotr Sarna err = -EINVAL; 60846ae6514bSPiotr Sarna goto restore_opts; 60856ae6514bSPiotr Sarna } 60866ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 60876ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 60886ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 60896ae6514bSPiotr Sarna err = -EINVAL; 60906ae6514bSPiotr Sarna goto restore_opts; 60916ae6514bSPiotr Sarna } 6092ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6093ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6094ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6095ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6096ab04df78SJan Kara err = -EINVAL; 6097ab04df78SJan Kara goto restore_opts; 6098ab04df78SJan Kara } 6099923ae0ffSRoss Zwisler } 6100923ae0ffSRoss Zwisler 6101cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6102cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6103cdb7ee4cSTahsin Erdogan err = -EINVAL; 6104cdb7ee4cSTahsin Erdogan goto restore_opts; 6105cdb7ee4cSTahsin Erdogan } 6106cdb7ee4cSTahsin Erdogan 61079b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6108124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6109ac27a0ecSDave Kleikamp 61101751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 61111751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6112ac27a0ecSDave Kleikamp 6113ac27a0ecSDave Kleikamp es = sbi->s_es; 6114ac27a0ecSDave Kleikamp 6115b3881f74STheodore Ts'o if (sbi->s_journal) { 6116617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 6117b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 6118b3881f74STheodore Ts'o } 6119ac27a0ecSDave Kleikamp 6120c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6121c92dc856SJan Kara flush_work(&sbi->s_error_work); 6122c92dc856SJan Kara 61231751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 61249b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6125ac27a0ecSDave Kleikamp err = -EROFS; 6126ac27a0ecSDave Kleikamp goto restore_opts; 6127ac27a0ecSDave Kleikamp } 6128ac27a0ecSDave Kleikamp 61291751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 613038c03b34STheodore Ts'o err = sync_filesystem(sb); 613138c03b34STheodore Ts'o if (err < 0) 613238c03b34STheodore Ts'o goto restore_opts; 61330f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 61340f0dd62fSChristoph Hellwig if (err < 0) 6135c79d967dSChristoph Hellwig goto restore_opts; 6136c79d967dSChristoph Hellwig 6137ac27a0ecSDave Kleikamp /* 6138ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6139ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6140ac27a0ecSDave Kleikamp */ 61411751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6142ac27a0ecSDave Kleikamp 6143ac27a0ecSDave Kleikamp /* 6144ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6145ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6146ac27a0ecSDave Kleikamp * mark the partition as valid again. 6147ac27a0ecSDave Kleikamp */ 6148617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6149617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6150ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6151ac27a0ecSDave Kleikamp 615211215630SJan Kara if (sbi->s_journal) { 615311215630SJan Kara /* 615411215630SJan Kara * We let remount-ro finish even if marking fs 615511215630SJan Kara * as clean failed... 615611215630SJan Kara */ 6157617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 615811215630SJan Kara } 6159ac27a0ecSDave Kleikamp } else { 6160a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6161e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 61622cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6163ac27a0ecSDave Kleikamp err = -EROFS; 6164ac27a0ecSDave Kleikamp goto restore_opts; 6165ac27a0ecSDave Kleikamp } 6166ead6596bSEric Sandeen /* 61678a266467STheodore Ts'o * Make sure the group descriptor checksums 61680b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 61698a266467STheodore Ts'o */ 61708a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 61718a266467STheodore Ts'o struct ext4_group_desc *gdp = 61728a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 61738a266467STheodore Ts'o 6174feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6175b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6176b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6177e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 61788a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 61796a797d27SDarrick J. Wong err = -EFSBADCRC; 61808a266467STheodore Ts'o goto restore_opts; 61818a266467STheodore Ts'o } 61828a266467STheodore Ts'o } 61838a266467STheodore Ts'o 61848a266467STheodore Ts'o /* 6185ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6186ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6187ead6596bSEric Sandeen * require a full umount/remount for now. 6188ead6596bSEric Sandeen */ 618902f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6190b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6191ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6192ead6596bSEric Sandeen "orphan inode list. Please " 6193b31e1552SEric Sandeen "umount/remount instead"); 6194ead6596bSEric Sandeen err = -EINVAL; 6195ead6596bSEric Sandeen goto restore_opts; 6196ead6596bSEric Sandeen } 6197ead6596bSEric Sandeen 6198ac27a0ecSDave Kleikamp /* 6199ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6200ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6201ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6202ac27a0ecSDave Kleikamp * the partition.) 6203ac27a0ecSDave Kleikamp */ 620411215630SJan Kara if (sbi->s_journal) { 620511215630SJan Kara err = ext4_clear_journal_err(sb, es); 620611215630SJan Kara if (err) 620711215630SJan Kara goto restore_opts; 620811215630SJan Kara } 6209ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6210c89128a0SJaegeuk Kim 6211c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6212c89128a0SJaegeuk Kim if (err) 6213c89128a0SJaegeuk Kim goto restore_opts; 6214c89128a0SJaegeuk Kim 62151751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6216e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6217c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6218c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6219c5e06d10SJohann Lombardi err = -EROFS; 6220c5e06d10SJohann Lombardi goto restore_opts; 6221c5e06d10SJohann Lombardi } 62223bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6223c79d967dSChristoph Hellwig enable_quota = 1; 62243bbef91bSAustin Kim #endif 6225ac27a0ecSDave Kleikamp } 6226ac27a0ecSDave Kleikamp } 6227bfff6873SLukas Czerner 6228bfff6873SLukas Czerner /* 6229bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6230bfff6873SLukas Czerner * current settings 6231bfff6873SLukas Czerner */ 6232bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6233bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6234bfff6873SLukas Czerner else { 6235bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6236bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6237bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6238bfff6873SLukas Czerner } 6239bfff6873SLukas Czerner 62400f5bde1dSJan Kara /* 62410f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 62420f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 62430f5bde1dSJan Kara * succeed. 62440f5bde1dSJan Kara */ 6245dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6246d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6247d176b1f6SJan Kara if (err) 6248d176b1f6SJan Kara goto restore_opts; 62490f5bde1dSJan Kara } 6250d176b1f6SJan Kara 6251c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 62524392fbc4SJan Kara err = ext4_commit_super(sb); 6253c89128a0SJaegeuk Kim if (err) 6254c89128a0SJaegeuk Kim goto restore_opts; 6255c89128a0SJaegeuk Kim } 62560390131bSFrank Mayhar 6257ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6258ac27a0ecSDave Kleikamp /* Release old quota file names */ 6259a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6260ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 62617c319d32SAditya Kali if (enable_quota) { 62627c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 62630f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6264e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 62657c319d32SAditya Kali err = ext4_enable_quotas(sb); 626607724f98STheodore Ts'o if (err) 62677c319d32SAditya Kali goto restore_opts; 62687c319d32SAditya Kali } 62697c319d32SAditya Kali } 62707c319d32SAditya Kali #endif 6271dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 62720f5bde1dSJan Kara ext4_release_system_zone(sb); 6273d4c402d9SCurt Wohlgemuth 627461bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 627561bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 627661bb4a1cSTheodore Ts'o 6277f25391ebSLukas Czerner /* 6278f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6279f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6280f25391ebSLukas Czerner * s_flags. Copy those selected flags from s_flags to *flags 6281f25391ebSLukas Czerner */ 6282f25391ebSLukas Czerner *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags); 6283f25391ebSLukas Czerner 6284ca9b404fSRoman Anufriev ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.", 6285ca9b404fSRoman Anufriev orig_data, ext4_quota_mode(sb)); 6286d4c402d9SCurt Wohlgemuth kfree(orig_data); 6287ac27a0ecSDave Kleikamp return 0; 62880b8e58a1SAndreas Dilger 6289ac27a0ecSDave Kleikamp restore_opts: 6290ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6291ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6292a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6293ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6294ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6295ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 629630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 629730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6298dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 62990f5bde1dSJan Kara ext4_release_system_zone(sb); 6300ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6301ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6302a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 630333458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 630433458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6305ac27a0ecSDave Kleikamp } 630633458eabSTheodore Ts'o synchronize_rcu(); 630733458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 630833458eabSTheodore Ts'o kfree(to_free[i]); 6309ac27a0ecSDave Kleikamp #endif 631061bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 631161bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6312d4c402d9SCurt Wohlgemuth kfree(orig_data); 6313ac27a0ecSDave Kleikamp return err; 6314ac27a0ecSDave Kleikamp } 6315ac27a0ecSDave Kleikamp 6316689c958cSLi Xi #ifdef CONFIG_QUOTA 6317689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6318689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6319689c958cSLi Xi { 6320689c958cSLi Xi struct kqid qid; 6321689c958cSLi Xi struct dquot *dquot; 6322689c958cSLi Xi u64 limit; 6323689c958cSLi Xi u64 curblock; 6324689c958cSLi Xi 6325689c958cSLi Xi qid = make_kqid_projid(projid); 6326689c958cSLi Xi dquot = dqget(sb, qid); 6327689c958cSLi Xi if (IS_ERR(dquot)) 6328689c958cSLi Xi return PTR_ERR(dquot); 63297b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6330689c958cSLi Xi 6331a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6332a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 633357c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 633457c32ea4SChengguang Xu 6335689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6336f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6337f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6338689c958cSLi Xi buf->f_blocks = limit; 6339689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6340689c958cSLi Xi (buf->f_blocks > curblock) ? 6341689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6342689c958cSLi Xi } 6343689c958cSLi Xi 6344a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6345a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6346689c958cSLi Xi if (limit && buf->f_files > limit) { 6347689c958cSLi Xi buf->f_files = limit; 6348689c958cSLi Xi buf->f_ffree = 6349689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6350689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6351689c958cSLi Xi } 6352689c958cSLi Xi 63537b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6354689c958cSLi Xi dqput(dquot); 6355689c958cSLi Xi return 0; 6356689c958cSLi Xi } 6357689c958cSLi Xi #endif 6358689c958cSLi Xi 6359617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6360ac27a0ecSDave Kleikamp { 6361ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6362617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6363617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 636427dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6365d02a9391SKazuya Mio s64 bfree; 636627dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6367ac27a0ecSDave Kleikamp 6368952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6369952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6370ac27a0ecSDave Kleikamp 6371617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6372ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6373b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 637457042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 637557042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6376d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 637757042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 637827dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 637927dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 638027dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6381ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6382ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 638352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6384617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 63859591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 63860b8e58a1SAndreas Dilger 6387689c958cSLi Xi #ifdef CONFIG_QUOTA 6388689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6389689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6390689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6391689c958cSLi Xi #endif 6392ac27a0ecSDave Kleikamp return 0; 6393ac27a0ecSDave Kleikamp } 6394ac27a0ecSDave Kleikamp 6395ac27a0ecSDave Kleikamp 6396ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6397ac27a0ecSDave Kleikamp 6398bc8230eeSJan Kara /* 6399bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6400bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6401bc8230eeSJan Kara */ 6402ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6403ac27a0ecSDave Kleikamp { 64044c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6405ac27a0ecSDave Kleikamp } 6406ac27a0ecSDave Kleikamp 6407617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6408ac27a0ecSDave Kleikamp { 6409ac27a0ecSDave Kleikamp int ret, err; 6410ac27a0ecSDave Kleikamp handle_t *handle; 6411ac27a0ecSDave Kleikamp struct inode *inode; 6412ac27a0ecSDave Kleikamp 6413ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 64149924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6415617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6416ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6417ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6418ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6419617ba13bSMingming Cao err = ext4_journal_stop(handle); 6420ac27a0ecSDave Kleikamp if (!ret) 6421ac27a0ecSDave Kleikamp ret = err; 6422ac27a0ecSDave Kleikamp return ret; 6423ac27a0ecSDave Kleikamp } 6424ac27a0ecSDave Kleikamp 6425617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6426ac27a0ecSDave Kleikamp { 6427ac27a0ecSDave Kleikamp int ret, err; 6428ac27a0ecSDave Kleikamp handle_t *handle; 6429ac27a0ecSDave Kleikamp 64309924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6431617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6432ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6433ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6434ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6435617ba13bSMingming Cao err = ext4_journal_stop(handle); 6436ac27a0ecSDave Kleikamp if (!ret) 6437ac27a0ecSDave Kleikamp ret = err; 6438ac27a0ecSDave Kleikamp return ret; 6439ac27a0ecSDave Kleikamp } 6440ac27a0ecSDave Kleikamp 6441617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6442ac27a0ecSDave Kleikamp { 6443ac27a0ecSDave Kleikamp int ret, err; 6444ac27a0ecSDave Kleikamp handle_t *handle; 6445ac27a0ecSDave Kleikamp 64469924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6447617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 64489c3013e9SJan Kara if (IS_ERR(handle)) { 64499c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 64509c3013e9SJan Kara dquot_release(dquot); 6451ac27a0ecSDave Kleikamp return PTR_ERR(handle); 64529c3013e9SJan Kara } 6453ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6454617ba13bSMingming Cao err = ext4_journal_stop(handle); 6455ac27a0ecSDave Kleikamp if (!ret) 6456ac27a0ecSDave Kleikamp ret = err; 6457ac27a0ecSDave Kleikamp return ret; 6458ac27a0ecSDave Kleikamp } 6459ac27a0ecSDave Kleikamp 6460617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6461ac27a0ecSDave Kleikamp { 6462262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6463262b4662SJan Kara 6464f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6465ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6466617ba13bSMingming Cao return ext4_write_dquot(dquot); 6467ac27a0ecSDave Kleikamp } else { 6468ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6469ac27a0ecSDave Kleikamp } 6470ac27a0ecSDave Kleikamp } 6471ac27a0ecSDave Kleikamp 6472617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6473ac27a0ecSDave Kleikamp { 6474ac27a0ecSDave Kleikamp int ret, err; 6475ac27a0ecSDave Kleikamp handle_t *handle; 6476ac27a0ecSDave Kleikamp 6477ac27a0ecSDave Kleikamp /* Data block + inode block */ 64782b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6479ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6480ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6481ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6482617ba13bSMingming Cao err = ext4_journal_stop(handle); 6483ac27a0ecSDave Kleikamp if (!ret) 6484ac27a0ecSDave Kleikamp ret = err; 6485ac27a0ecSDave Kleikamp return ret; 6486ac27a0ecSDave Kleikamp } 6487ac27a0ecSDave Kleikamp 6488daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6489daf647d2STheodore Ts'o { 6490daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6491daf647d2STheodore Ts'o 6492daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6493daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6494daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6495daf647d2STheodore Ts'o * because the name of the lock is set using the 6496daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6497daf647d2STheodore Ts'o */ 6498daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6499daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6500daf647d2STheodore Ts'o } 6501daf647d2STheodore Ts'o 6502ac27a0ecSDave Kleikamp /* 6503ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6504ac27a0ecSDave Kleikamp */ 6505617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 65068c54ca9cSAl Viro const struct path *path) 6507ac27a0ecSDave Kleikamp { 6508ac27a0ecSDave Kleikamp int err; 6509ac27a0ecSDave Kleikamp 6510ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6511ac27a0ecSDave Kleikamp return -EINVAL; 65120623543bSJan Kara 6513ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6514d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6515ac27a0ecSDave Kleikamp return -EXDEV; 6516e0770e91SJan Kara 6517e0770e91SJan Kara /* Quota already enabled for this file? */ 6518e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6519e0770e91SJan Kara return -EBUSY; 6520e0770e91SJan Kara 65210623543bSJan Kara /* Journaling quota? */ 65220623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 65232b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6524f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6525b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6526b31e1552SEric Sandeen "Quota file not on filesystem root. " 6527b31e1552SEric Sandeen "Journaled quota will not work"); 652891389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 652991389240SJan Kara } else { 653091389240SJan Kara /* 653191389240SJan Kara * Clear the flag just in case mount options changed since 653291389240SJan Kara * last time. 653391389240SJan Kara */ 653491389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 65350623543bSJan Kara } 65360623543bSJan Kara 65370623543bSJan Kara /* 65380623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 65390623543bSJan Kara * all updates to the file when we bypass pagecache... 65400623543bSJan Kara */ 65410390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 65422b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 65430623543bSJan Kara /* 65440623543bSJan Kara * We don't need to lock updates but journal_flush() could 65450623543bSJan Kara * otherwise be livelocked... 65460623543bSJan Kara */ 65470623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 654801d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 65490623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6550f00c9e44SJan Kara if (err) 65517ffe1ea8SHidehiro Kawai return err; 65527ffe1ea8SHidehiro Kawai } 6553957153fcSJan Kara 6554daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6555daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6556957153fcSJan Kara if (err) { 6557daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6558daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6559957153fcSJan Kara } else { 6560957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6561957153fcSJan Kara handle_t *handle; 6562957153fcSJan Kara 656361a92987SJan Kara /* 656461a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 656561a92987SJan Kara * files. If this fails, we return success anyway since quotas 656661a92987SJan Kara * are already enabled and this is not a hard failure. 656761a92987SJan Kara */ 6568957153fcSJan Kara inode_lock(inode); 6569957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6570957153fcSJan Kara if (IS_ERR(handle)) 6571957153fcSJan Kara goto unlock_inode; 6572957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6573957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6574957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 65754209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6576957153fcSJan Kara ext4_journal_stop(handle); 6577957153fcSJan Kara unlock_inode: 6578957153fcSJan Kara inode_unlock(inode); 6579957153fcSJan Kara } 6580daf647d2STheodore Ts'o return err; 6581ac27a0ecSDave Kleikamp } 6582ac27a0ecSDave Kleikamp 65837c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 65847c319d32SAditya Kali unsigned int flags) 65857c319d32SAditya Kali { 65867c319d32SAditya Kali int err; 65877c319d32SAditya Kali struct inode *qf_inode; 6588a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 65897c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6590689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6591689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 65927c319d32SAditya Kali }; 65937c319d32SAditya Kali 6594e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 65957c319d32SAditya Kali 65967c319d32SAditya Kali if (!qf_inums[type]) 65977c319d32SAditya Kali return -EPERM; 65987c319d32SAditya Kali 65998a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 66007c319d32SAditya Kali if (IS_ERR(qf_inode)) { 66017c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 66027c319d32SAditya Kali return PTR_ERR(qf_inode); 66037c319d32SAditya Kali } 66047c319d32SAditya Kali 6605bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6606bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6607daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 66087212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6609daf647d2STheodore Ts'o if (err) 6610daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 661161157b24SPan Bian iput(qf_inode); 66127c319d32SAditya Kali 66137c319d32SAditya Kali return err; 66147c319d32SAditya Kali } 66157c319d32SAditya Kali 66167c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 661725c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 66187c319d32SAditya Kali { 66197c319d32SAditya Kali int type, err = 0; 6620a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 66217c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6622689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6623689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 66247c319d32SAditya Kali }; 662549da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 662649da9392SJan Kara test_opt(sb, USRQUOTA), 662749da9392SJan Kara test_opt(sb, GRPQUOTA), 662849da9392SJan Kara test_opt(sb, PRJQUOTA), 662949da9392SJan Kara }; 66307c319d32SAditya Kali 663191389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6632a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 66337c319d32SAditya Kali if (qf_inums[type]) { 66347c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 663549da9392SJan Kara DQUOT_USAGE_ENABLED | 663649da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 66377c319d32SAditya Kali if (err) { 66387c319d32SAditya Kali ext4_warning(sb, 663972ba7450STheodore Ts'o "Failed to enable quota tracking " 664072ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 664172ba7450STheodore Ts'o "e2fsck to fix.", type, err); 66427f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 66437f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 66447f144fd0SJunichi Uekawa 66457c319d32SAditya Kali return err; 66467c319d32SAditya Kali } 66477c319d32SAditya Kali } 66487c319d32SAditya Kali } 66497c319d32SAditya Kali return 0; 66507c319d32SAditya Kali } 66517c319d32SAditya Kali 6652ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6653ca0e05e4SDmitry Monakhov { 665421f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 665521f97697SJan Kara handle_t *handle; 6656957153fcSJan Kara int err; 665721f97697SJan Kara 665887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 665987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 666087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6661ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6662ca0e05e4SDmitry Monakhov 6663957153fcSJan Kara if (!inode || !igrab(inode)) 66640b268590SAmir Goldstein goto out; 66650b268590SAmir Goldstein 6666957153fcSJan Kara err = dquot_quota_off(sb, type); 6667964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6668957153fcSJan Kara goto out_put; 6669957153fcSJan Kara 6670957153fcSJan Kara inode_lock(inode); 667161a92987SJan Kara /* 667261a92987SJan Kara * Update modification times of quota files when userspace can 667361a92987SJan Kara * start looking at them. If we fail, we return success anyway since 667461a92987SJan Kara * this is not a hard failure and quotas are already disabled. 667561a92987SJan Kara */ 66769924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 66774209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 66784209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6679957153fcSJan Kara goto out_unlock; 66804209ae12SHarshad Shirwadkar } 6681957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6682957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6683eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 66844209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 668521f97697SJan Kara ext4_journal_stop(handle); 6686957153fcSJan Kara out_unlock: 6687957153fcSJan Kara inode_unlock(inode); 6688957153fcSJan Kara out_put: 6689964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6690957153fcSJan Kara iput(inode); 6691957153fcSJan Kara return err; 669221f97697SJan Kara out: 6693ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6694ca0e05e4SDmitry Monakhov } 6695ca0e05e4SDmitry Monakhov 6696ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6697ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6698ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6699ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6700617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6701ac27a0ecSDave Kleikamp size_t len, loff_t off) 6702ac27a0ecSDave Kleikamp { 6703ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6704725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6705ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6706ac27a0ecSDave Kleikamp int tocopy; 6707ac27a0ecSDave Kleikamp size_t toread; 6708ac27a0ecSDave Kleikamp struct buffer_head *bh; 6709ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6710ac27a0ecSDave Kleikamp 6711ac27a0ecSDave Kleikamp if (off > i_size) 6712ac27a0ecSDave Kleikamp return 0; 6713ac27a0ecSDave Kleikamp if (off+len > i_size) 6714ac27a0ecSDave Kleikamp len = i_size-off; 6715ac27a0ecSDave Kleikamp toread = len; 6716ac27a0ecSDave Kleikamp while (toread > 0) { 6717ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6718ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 67191c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 67201c215028STheodore Ts'o if (IS_ERR(bh)) 67211c215028STheodore Ts'o return PTR_ERR(bh); 6722ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6723ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6724ac27a0ecSDave Kleikamp else 6725ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6726ac27a0ecSDave Kleikamp brelse(bh); 6727ac27a0ecSDave Kleikamp offset = 0; 6728ac27a0ecSDave Kleikamp toread -= tocopy; 6729ac27a0ecSDave Kleikamp data += tocopy; 6730ac27a0ecSDave Kleikamp blk++; 6731ac27a0ecSDave Kleikamp } 6732ac27a0ecSDave Kleikamp return len; 6733ac27a0ecSDave Kleikamp } 6734ac27a0ecSDave Kleikamp 6735ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6736ac27a0ecSDave Kleikamp * enough credits) */ 6737617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6738ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6739ac27a0ecSDave Kleikamp { 6740ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6741725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 67424209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6743c5e298aeSTheodore Ts'o int retries = 0; 6744ac27a0ecSDave Kleikamp struct buffer_head *bh; 6745ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6746ac27a0ecSDave Kleikamp 67470390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 6748b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6749b31e1552SEric Sandeen " cancelled because transaction is not started", 67509c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 67519c3013e9SJan Kara return -EIO; 67529c3013e9SJan Kara } 675367eeb568SDmitry Monakhov /* 675467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 675567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 675667eeb568SDmitry Monakhov */ 675767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 675867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 675967eeb568SDmitry Monakhov " cancelled because not block aligned", 676067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 676167eeb568SDmitry Monakhov return -EIO; 676267eeb568SDmitry Monakhov } 676367eeb568SDmitry Monakhov 6764c5e298aeSTheodore Ts'o do { 6765c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6766c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6767c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 676845586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6769c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 67701c215028STheodore Ts'o if (IS_ERR(bh)) 67711c215028STheodore Ts'o return PTR_ERR(bh); 6772ac27a0ecSDave Kleikamp if (!bh) 6773ac27a0ecSDave Kleikamp goto out; 67745d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6775188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 6776ac27a0ecSDave Kleikamp if (err) { 6777ac27a0ecSDave Kleikamp brelse(bh); 67781c215028STheodore Ts'o return err; 6779ac27a0ecSDave Kleikamp } 6780ac27a0ecSDave Kleikamp lock_buffer(bh); 678167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6782ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6783ac27a0ecSDave Kleikamp unlock_buffer(bh); 67840390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6785ac27a0ecSDave Kleikamp brelse(bh); 6786ac27a0ecSDave Kleikamp out: 678767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 678867eeb568SDmitry Monakhov i_size_write(inode, off + len); 6789617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 67904209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 67914209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 67924209ae12SHarshad Shirwadkar err = err2; 679321f97697SJan Kara } 67944209ae12SHarshad Shirwadkar return err ? err : len; 6795ac27a0ecSDave Kleikamp } 6796ac27a0ecSDave Kleikamp #endif 6797ac27a0ecSDave Kleikamp 6798152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 6799152a0836SAl Viro const char *dev_name, void *data) 6800ac27a0ecSDave Kleikamp { 6801152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 6802ac27a0ecSDave Kleikamp } 6803ac27a0ecSDave Kleikamp 6804c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 680524b58424STheodore Ts'o static inline void register_as_ext2(void) 680624b58424STheodore Ts'o { 680724b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 680824b58424STheodore Ts'o if (err) 680924b58424STheodore Ts'o printk(KERN_WARNING 681024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 681124b58424STheodore Ts'o } 681224b58424STheodore Ts'o 681324b58424STheodore Ts'o static inline void unregister_as_ext2(void) 681424b58424STheodore Ts'o { 681524b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 681624b58424STheodore Ts'o } 68172035e776STheodore Ts'o 68182035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 68192035e776STheodore Ts'o { 6820e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 68212035e776STheodore Ts'o return 0; 6822bc98a42cSDavid Howells if (sb_rdonly(sb)) 68232035e776STheodore Ts'o return 1; 6824e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 68252035e776STheodore Ts'o return 0; 68262035e776STheodore Ts'o return 1; 68272035e776STheodore Ts'o } 682824b58424STheodore Ts'o #else 682924b58424STheodore Ts'o static inline void register_as_ext2(void) { } 683024b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 68312035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 683224b58424STheodore Ts'o #endif 683324b58424STheodore Ts'o 683424b58424STheodore Ts'o static inline void register_as_ext3(void) 683524b58424STheodore Ts'o { 683624b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 683724b58424STheodore Ts'o if (err) 683824b58424STheodore Ts'o printk(KERN_WARNING 683924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 684024b58424STheodore Ts'o } 684124b58424STheodore Ts'o 684224b58424STheodore Ts'o static inline void unregister_as_ext3(void) 684324b58424STheodore Ts'o { 684424b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 684524b58424STheodore Ts'o } 68462035e776STheodore Ts'o 68472035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 68482035e776STheodore Ts'o { 6849e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 68502035e776STheodore Ts'o return 0; 6851e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 68522035e776STheodore Ts'o return 0; 6853bc98a42cSDavid Howells if (sb_rdonly(sb)) 68542035e776STheodore Ts'o return 1; 6855e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 68562035e776STheodore Ts'o return 0; 68572035e776STheodore Ts'o return 1; 68582035e776STheodore Ts'o } 685924b58424STheodore Ts'o 686003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 6861ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 686203010a33STheodore Ts'o .name = "ext4", 6863152a0836SAl Viro .mount = ext4_mount, 6864ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 686514f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 6866ac27a0ecSDave Kleikamp }; 68677f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 6868ac27a0ecSDave Kleikamp 6869e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 6870e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 6871e9e3bcecSEric Sandeen 68725dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 6873ac27a0ecSDave Kleikamp { 6874e9e3bcecSEric Sandeen int i, err; 6875c9de560dSAlex Tomas 6876e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 687707c0c5d8SAl Viro ext4_li_info = NULL; 687807c0c5d8SAl Viro 68799a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 688012e9b892SDmitry Monakhov ext4_check_flag_values(); 6881e9e3bcecSEric Sandeen 6882e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 6883e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 6884e9e3bcecSEric Sandeen 688551865fdaSZheng Liu err = ext4_init_es(); 68866fd058f7STheodore Ts'o if (err) 68876fd058f7STheodore Ts'o return err; 688851865fdaSZheng Liu 68891dc0aa46SEric Whitney err = ext4_init_pending(); 68901dc0aa46SEric Whitney if (err) 689122cfe4b4SEric Biggers goto out7; 689222cfe4b4SEric Biggers 689322cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 689422cfe4b4SEric Biggers if (err) 68951dc0aa46SEric Whitney goto out6; 68961dc0aa46SEric Whitney 689751865fdaSZheng Liu err = ext4_init_pageio(); 689851865fdaSZheng Liu if (err) 6899b5799018STheodore Ts'o goto out5; 690051865fdaSZheng Liu 69015dabfc78STheodore Ts'o err = ext4_init_system_zone(); 6902bd2d0210STheodore Ts'o if (err) 6903b5799018STheodore Ts'o goto out4; 6904857ac889SLukas Czerner 6905b5799018STheodore Ts'o err = ext4_init_sysfs(); 6906dd68314cSTheodore Ts'o if (err) 6907b5799018STheodore Ts'o goto out3; 6908857ac889SLukas Czerner 69095dabfc78STheodore Ts'o err = ext4_init_mballoc(); 6910ac27a0ecSDave Kleikamp if (err) 6911c9de560dSAlex Tomas goto out2; 6912ac27a0ecSDave Kleikamp err = init_inodecache(); 6913ac27a0ecSDave Kleikamp if (err) 6914ac27a0ecSDave Kleikamp goto out1; 6915aa75f4d3SHarshad Shirwadkar 6916aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 6917aa75f4d3SHarshad Shirwadkar if (err) 6918aa75f4d3SHarshad Shirwadkar goto out05; 6919aa75f4d3SHarshad Shirwadkar 692024b58424STheodore Ts'o register_as_ext3(); 69212035e776STheodore Ts'o register_as_ext2(); 692203010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 6923ac27a0ecSDave Kleikamp if (err) 6924ac27a0ecSDave Kleikamp goto out; 6925bfff6873SLukas Czerner 6926ac27a0ecSDave Kleikamp return 0; 6927ac27a0ecSDave Kleikamp out: 692824b58424STheodore Ts'o unregister_as_ext2(); 692924b58424STheodore Ts'o unregister_as_ext3(); 6930aa75f4d3SHarshad Shirwadkar out05: 6931ac27a0ecSDave Kleikamp destroy_inodecache(); 6932ac27a0ecSDave Kleikamp out1: 69335dabfc78STheodore Ts'o ext4_exit_mballoc(); 69349c191f70ST Makphaibulchoke out2: 6935b5799018STheodore Ts'o ext4_exit_sysfs(); 6936b5799018STheodore Ts'o out3: 6937dd68314cSTheodore Ts'o ext4_exit_system_zone(); 6938b5799018STheodore Ts'o out4: 69395dabfc78STheodore Ts'o ext4_exit_pageio(); 6940b5799018STheodore Ts'o out5: 694122cfe4b4SEric Biggers ext4_exit_post_read_processing(); 69421dc0aa46SEric Whitney out6: 694322cfe4b4SEric Biggers ext4_exit_pending(); 694422cfe4b4SEric Biggers out7: 694551865fdaSZheng Liu ext4_exit_es(); 694651865fdaSZheng Liu 6947ac27a0ecSDave Kleikamp return err; 6948ac27a0ecSDave Kleikamp } 6949ac27a0ecSDave Kleikamp 69505dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 6951ac27a0ecSDave Kleikamp { 6952bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 695324b58424STheodore Ts'o unregister_as_ext2(); 695424b58424STheodore Ts'o unregister_as_ext3(); 695503010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 6956ac27a0ecSDave Kleikamp destroy_inodecache(); 69575dabfc78STheodore Ts'o ext4_exit_mballoc(); 6958b5799018STheodore Ts'o ext4_exit_sysfs(); 69595dabfc78STheodore Ts'o ext4_exit_system_zone(); 69605dabfc78STheodore Ts'o ext4_exit_pageio(); 696122cfe4b4SEric Biggers ext4_exit_post_read_processing(); 6962dd12ed14SEric Sandeen ext4_exit_es(); 69631dc0aa46SEric Whitney ext4_exit_pending(); 6964ac27a0ecSDave Kleikamp } 6965ac27a0ecSDave Kleikamp 6966ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 696783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6968ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 69697ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 69705dabfc78STheodore Ts'o module_init(ext4_init_fs) 69715dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6972