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> 49bfff6873SLukas Czerner 503dcf5451SChristoph Hellwig #include "ext4.h" 514a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 523dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 53ac27a0ecSDave Kleikamp #include "xattr.h" 54ac27a0ecSDave Kleikamp #include "acl.h" 553661d286STheodore Ts'o #include "mballoc.h" 560c9ec4beSDarrick J. Wong #include "fsmap.h" 57ac27a0ecSDave Kleikamp 589bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 599bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 609bffad1eSTheodore Ts'o 610b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6259ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 63e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 649f6200bbSTheodore Ts'o 65617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 66ac27a0ecSDave Kleikamp unsigned long journal_devnum); 672adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 682d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 694392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7011215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 71617ba13bSMingming Cao struct ext4_super_block *es); 7211215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 73617ba13bSMingming Cao struct ext4_super_block *es); 74617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 75617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 76617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 77c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 78c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 79152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 80152a0836SAl Viro const char *dev_name, void *data); 812035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 822035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 83d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 84bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 85bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 868f1f7453SEric Sandeen static void ext4_clear_request_list(void); 87c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 88c6cb7e77SEric Whitney unsigned int journal_inum); 89ac27a0ecSDave Kleikamp 90e74031fdSJan Kara /* 91e74031fdSJan Kara * Lock ordering 92e74031fdSJan Kara * 93e74031fdSJan Kara * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and 94e74031fdSJan Kara * i_mmap_rwsem (inode->i_mmap_rwsem)! 95e74031fdSJan Kara * 96e74031fdSJan Kara * page fault path: 97c1e8d7c6SMichel Lespinasse * mmap_lock -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 98e74031fdSJan Kara * page lock -> i_data_sem (rw) 99e74031fdSJan Kara * 100e74031fdSJan Kara * buffered write path: 101c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 102e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 103e74031fdSJan Kara * i_data_sem (rw) 104e74031fdSJan Kara * 105e74031fdSJan Kara * truncate: 1061d39834fSNikolay Borisov * sb_start_write -> i_mutex -> i_mmap_sem (w) -> i_mmap_rwsem (w) -> page lock 1071d39834fSNikolay Borisov * sb_start_write -> i_mutex -> i_mmap_sem (w) -> transaction start -> 1081d39834fSNikolay Borisov * i_data_sem (rw) 109e74031fdSJan Kara * 110e74031fdSJan Kara * direct IO: 111c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1121d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 113e74031fdSJan Kara * 114e74031fdSJan Kara * writepages: 115e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 116e74031fdSJan Kara */ 117e74031fdSJan Kara 118c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1192035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1202035e776STheodore Ts'o .owner = THIS_MODULE, 1212035e776STheodore Ts'o .name = "ext2", 1222035e776STheodore Ts'o .mount = ext4_mount, 1232035e776STheodore Ts'o .kill_sb = kill_block_super, 1242035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1252035e776STheodore Ts'o }; 1267f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 127fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1282035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1292035e776STheodore Ts'o #else 1302035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1312035e776STheodore Ts'o #endif 1322035e776STheodore Ts'o 1332035e776STheodore Ts'o 134ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 135ba69f9abSJan Kara .owner = THIS_MODULE, 136ba69f9abSJan Kara .name = "ext3", 137152a0836SAl Viro .mount = ext4_mount, 138ba69f9abSJan Kara .kill_sb = kill_block_super, 139ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 140ba69f9abSJan Kara }; 1417f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 142fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 143ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 144bd81d8eeSLaurent Vivier 145fa491b14Szhangyi (F) 146fa491b14Szhangyi (F) static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags, 147fa491b14Szhangyi (F) bh_end_io_t *end_io) 148fa491b14Szhangyi (F) { 149fb265c9cSTheodore Ts'o /* 150fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 151fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 152fa491b14Szhangyi (F) * recheck the buffer contents. 153fa491b14Szhangyi (F) */ 154fa491b14Szhangyi (F) clear_buffer_verified(bh); 155fa491b14Szhangyi (F) 156fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 157fa491b14Szhangyi (F) get_bh(bh); 158fa491b14Szhangyi (F) submit_bh(REQ_OP_READ, op_flags, bh); 159fa491b14Szhangyi (F) } 160fa491b14Szhangyi (F) 161fa491b14Szhangyi (F) void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 162fa491b14Szhangyi (F) bh_end_io_t *end_io) 163fa491b14Szhangyi (F) { 164fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 165fa491b14Szhangyi (F) 166fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 167fa491b14Szhangyi (F) unlock_buffer(bh); 168fa491b14Szhangyi (F) return; 169fa491b14Szhangyi (F) } 170fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 171fa491b14Szhangyi (F) } 172fa491b14Szhangyi (F) 173fa491b14Szhangyi (F) int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io) 174fa491b14Szhangyi (F) { 175fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 176fa491b14Szhangyi (F) 177fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 178fa491b14Szhangyi (F) unlock_buffer(bh); 179fa491b14Szhangyi (F) return 0; 180fa491b14Szhangyi (F) } 181fa491b14Szhangyi (F) 182fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 183fa491b14Szhangyi (F) 184fa491b14Szhangyi (F) wait_on_buffer(bh); 185fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 186fa491b14Szhangyi (F) return 0; 187fa491b14Szhangyi (F) return -EIO; 188fa491b14Szhangyi (F) } 189fa491b14Szhangyi (F) 190fa491b14Szhangyi (F) int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait) 191fa491b14Szhangyi (F) { 192fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 193fa491b14Szhangyi (F) if (wait) 194fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 195fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 196fa491b14Szhangyi (F) return 0; 197fa491b14Szhangyi (F) } 198fa491b14Szhangyi (F) if (wait) { 199fa491b14Szhangyi (F) wait_on_buffer(bh); 200fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 201fa491b14Szhangyi (F) return 0; 202fa491b14Szhangyi (F) return -EIO; 203fa491b14Szhangyi (F) } 204fa491b14Szhangyi (F) return 0; 205fa491b14Szhangyi (F) } 206fa491b14Szhangyi (F) 207fb265c9cSTheodore Ts'o /* 2088394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 209fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 210fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 211fb265c9cSTheodore Ts'o * return. 212fb265c9cSTheodore Ts'o */ 2138394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 2148394a6abSzhangyi (F) sector_t block, int op_flags, 2158394a6abSzhangyi (F) gfp_t gfp) 216fb265c9cSTheodore Ts'o { 2172d069c08Szhangyi (F) struct buffer_head *bh; 2182d069c08Szhangyi (F) int ret; 219fb265c9cSTheodore Ts'o 2208394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 221fb265c9cSTheodore Ts'o if (bh == NULL) 222fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 223cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 224fb265c9cSTheodore Ts'o return bh; 2252d069c08Szhangyi (F) 2262d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2272d069c08Szhangyi (F) if (ret) { 228fb265c9cSTheodore Ts'o put_bh(bh); 2292d069c08Szhangyi (F) return ERR_PTR(ret); 2302d069c08Szhangyi (F) } 2312d069c08Szhangyi (F) return bh; 232fb265c9cSTheodore Ts'o } 233fb265c9cSTheodore Ts'o 2348394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 2358394a6abSzhangyi (F) int op_flags) 2368394a6abSzhangyi (F) { 2378394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2388394a6abSzhangyi (F) } 2398394a6abSzhangyi (F) 2408394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2418394a6abSzhangyi (F) sector_t block) 2428394a6abSzhangyi (F) { 2438394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2448394a6abSzhangyi (F) } 2458394a6abSzhangyi (F) 2465df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2475df1d412Szhangyi (F) { 2485df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2495df1d412Szhangyi (F) 2505df1d412Szhangyi (F) if (likely(bh)) { 2515df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2525df1d412Szhangyi (F) brelse(bh); 2535df1d412Szhangyi (F) } 254c197855eSStephen Hemminger } 255a9c47317SDarrick J. Wong 256a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2579aa5d32bSDmitry Monakhov struct ext4_super_block *es) 258a9c47317SDarrick J. Wong { 259a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 260a9c47317SDarrick J. Wong return 1; 261a9c47317SDarrick J. Wong 262a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 26306db49e6STheodore Ts'o } 264a9c47317SDarrick J. Wong 26506db49e6STheodore Ts'o static __le32 ext4_superblock_csum(struct super_block *sb, 26606db49e6STheodore Ts'o struct ext4_super_block *es) 2679aa5d32bSDmitry Monakhov { 268a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 269a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 270a9c47317SDarrick J. Wong __u32 csum; 271a9c47317SDarrick J. Wong 272a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 2739933fc0aSTheodore Ts'o 2749933fc0aSTheodore Ts'o return cpu_to_le32(csum); 2759933fc0aSTheodore Ts'o } 2769933fc0aSTheodore Ts'o 2778be04b93SJoe Perches static int ext4_superblock_csum_verify(struct super_block *sb, 2789933fc0aSTheodore Ts'o struct ext4_super_block *es) 2799933fc0aSTheodore Ts'o { 2809933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2819933fc0aSTheodore Ts'o return 1; 2829933fc0aSTheodore Ts'o 2839933fc0aSTheodore Ts'o return es->s_checksum == ext4_superblock_csum(sb, es); 2849933fc0aSTheodore Ts'o } 2859933fc0aSTheodore Ts'o 2869933fc0aSTheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 2878be04b93SJoe Perches { 2889933fc0aSTheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2899933fc0aSTheodore Ts'o 2909933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2919933fc0aSTheodore Ts'o return; 2929933fc0aSTheodore Ts'o 2938fadc143SAlexandre Ratchov es->s_checksum = ext4_superblock_csum(sb, es); 2948fadc143SAlexandre Ratchov } 295bd81d8eeSLaurent Vivier 296bd81d8eeSLaurent Vivier ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 297bd81d8eeSLaurent Vivier struct ext4_group_desc *bg) 298bd81d8eeSLaurent Vivier { 2993a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3008fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3018fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 302bd81d8eeSLaurent Vivier } 303bd81d8eeSLaurent Vivier 3048fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3058fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 306bd81d8eeSLaurent Vivier { 3075272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3088fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3098fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 310bd81d8eeSLaurent Vivier } 311bd81d8eeSLaurent Vivier 3128fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3138fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 314bd81d8eeSLaurent Vivier { 3155272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3168fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3178fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 318bd81d8eeSLaurent Vivier } 319bd81d8eeSLaurent Vivier 320021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 321560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 322560671a0SAneesh Kumar K.V { 323560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 324560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 325560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 326560671a0SAneesh Kumar K.V } 327560671a0SAneesh Kumar K.V 328560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 329560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 330560671a0SAneesh Kumar K.V { 331560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 332560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 333560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 334560671a0SAneesh Kumar K.V } 335560671a0SAneesh Kumar K.V 336560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 337560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 338560671a0SAneesh Kumar K.V { 339560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 340560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 341560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 342560671a0SAneesh Kumar K.V } 343560671a0SAneesh Kumar K.V 344560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 345560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 346560671a0SAneesh Kumar K.V { 347560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 348560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 349560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 350560671a0SAneesh Kumar K.V } 351560671a0SAneesh Kumar K.V 3528fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3538fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 354bd81d8eeSLaurent Vivier { 3553a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3568fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3578fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 358bd81d8eeSLaurent Vivier } 359bd81d8eeSLaurent Vivier 3608fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3618fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 362bd81d8eeSLaurent Vivier { 3635272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3648fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3658fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 366bd81d8eeSLaurent Vivier } 367bd81d8eeSLaurent Vivier 3688fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3698fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 370bd81d8eeSLaurent Vivier { 3715272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3728fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3738fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 374bd81d8eeSLaurent Vivier } 375bd81d8eeSLaurent Vivier 376021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 377560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 378560671a0SAneesh Kumar K.V { 379560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 380560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 381560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 382560671a0SAneesh Kumar K.V } 383560671a0SAneesh Kumar K.V 384560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 385560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 386560671a0SAneesh Kumar K.V { 387560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 388560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 389560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 390560671a0SAneesh Kumar K.V } 391560671a0SAneesh Kumar K.V 392560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 393560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 394560671a0SAneesh Kumar K.V { 395560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 396560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 397560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 398560671a0SAneesh Kumar K.V } 399560671a0SAneesh Kumar K.V 400560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 401560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 402560671a0SAneesh Kumar K.V { 403560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 404560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 405560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 406560671a0SAneesh Kumar K.V } 407560671a0SAneesh Kumar K.V 408c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4096a0678a7SArnd Bergmann { 4106a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4116a0678a7SArnd Bergmann 4126a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4136a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4146a0678a7SArnd Bergmann } 4156a0678a7SArnd Bergmann 4166a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4176a0678a7SArnd Bergmann { 4186a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4196a0678a7SArnd Bergmann } 4206a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 421c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 422c92dc856SJan Kara ktime_get_real_seconds()) 4236a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4246a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 425d3d1faf6SCurt Wohlgemuth 426bdfe0cbdSTheodore Ts'o /* 427bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 428bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 429bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 430bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 431bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 432bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 433bdfe0cbdSTheodore Ts'o */ 434bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 435bdfe0cbdSTheodore Ts'o { 436bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 437bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 438bdfe0cbdSTheodore Ts'o 439bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 440bdfe0cbdSTheodore Ts'o } 441bdfe0cbdSTheodore Ts'o 44218aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 44318aadd47SBobi Jam { 44418aadd47SBobi Jam struct super_block *sb = journal->j_private; 44518aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 44618aadd47SBobi Jam int error = is_journal_aborted(journal); 4475d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 44818aadd47SBobi Jam 4495d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 450a0154344SDaeho Jeong 451a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 452a0154344SDaeho Jeong 45318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4545d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4555d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4565d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 45718aadd47SBobi Jam list_del_init(&jce->jce_list); 45818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 45918aadd47SBobi Jam jce->jce_func(sb, jce, error); 46018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 46118aadd47SBobi Jam } 46218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46318aadd47SBobi Jam } 4641c13d5c0STheodore Ts'o 465afb585a9SMauricio Faria de Oliveira /* 466afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 467afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 468afb585a9SMauricio Faria de Oliveira * 469afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 470afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 471afb585a9SMauricio Faria de Oliveira * to write protect the pages. 472afb585a9SMauricio Faria de Oliveira * 473afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 474afb585a9SMauricio Faria de Oliveira */ 475afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 476afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 477afb585a9SMauricio Faria de Oliveira void *data) 478afb585a9SMauricio Faria de Oliveira { 479afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 480afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 481afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 482afb585a9SMauricio Faria de Oliveira 483afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 484afb585a9SMauricio Faria de Oliveira do { 485afb585a9SMauricio Faria de Oliveira /* 486afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 487afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 488afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 489afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 490afb585a9SMauricio Faria de Oliveira * properly. 491afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 492afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 493afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 494afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 495afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 496afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 497afb585a9SMauricio Faria de Oliveira */ 498afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 499afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 500afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 501afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 502afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 503afb585a9SMauricio Faria de Oliveira goto out; 504afb585a9SMauricio Faria de Oliveira } 505afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 506afb585a9SMauricio Faria de Oliveira 507afb585a9SMauricio Faria de Oliveira out: 508afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 509afb585a9SMauricio Faria de Oliveira } 510afb585a9SMauricio Faria de Oliveira 511afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 512afb585a9SMauricio Faria de Oliveira { 513afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 514afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 515afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 516afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 517afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 518afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 519afb585a9SMauricio Faria de Oliveira }; 520afb585a9SMauricio Faria de Oliveira 521afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 522afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 523afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 524afb585a9SMauricio Faria de Oliveira } 525afb585a9SMauricio Faria de Oliveira 526afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 527afb585a9SMauricio Faria de Oliveira { 528afb585a9SMauricio Faria de Oliveira int ret; 529afb585a9SMauricio Faria de Oliveira 530afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 531afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 532afb585a9SMauricio Faria de Oliveira else 533afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 534afb585a9SMauricio Faria de Oliveira 535afb585a9SMauricio Faria de Oliveira return ret; 536afb585a9SMauricio Faria de Oliveira } 537afb585a9SMauricio Faria de Oliveira 538afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 539afb585a9SMauricio Faria de Oliveira { 540afb585a9SMauricio Faria de Oliveira int ret = 0; 541afb585a9SMauricio Faria de Oliveira 542afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 543afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 544afb585a9SMauricio Faria de Oliveira 545afb585a9SMauricio Faria de Oliveira return ret; 546afb585a9SMauricio Faria de Oliveira } 547afb585a9SMauricio Faria de Oliveira 5481dc1097fSJan Kara static bool system_going_down(void) 5491dc1097fSJan Kara { 5501dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5511dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5521dc1097fSJan Kara } 5531dc1097fSJan Kara 55402a7780eSJan Kara struct ext4_err_translation { 55502a7780eSJan Kara int code; 55602a7780eSJan Kara int errno; 55702a7780eSJan Kara }; 55802a7780eSJan Kara 55902a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 56002a7780eSJan Kara 56102a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 56202a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 56302a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 56402a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 56502a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 56602a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 56702a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 56802a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 56902a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 57002a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 57102a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 57202a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 57302a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 57402a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 57502a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 57602a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 57702a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 57802a7780eSJan Kara }; 57902a7780eSJan Kara 58002a7780eSJan Kara static int ext4_errno_to_code(int errno) 58102a7780eSJan Kara { 58202a7780eSJan Kara int i; 58302a7780eSJan Kara 58402a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 58502a7780eSJan Kara if (err_translation[i].errno == errno) 58602a7780eSJan Kara return err_translation[i].code; 58702a7780eSJan Kara return EXT4_ERR_UNKNOWN; 58802a7780eSJan Kara } 58902a7780eSJan Kara 5902d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 59140676623SJan Kara __u32 ino, __u64 block, 59240676623SJan Kara const char *func, unsigned int line) 59340676623SJan Kara { 594c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 59540676623SJan Kara 59602a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 59702a7780eSJan Kara if (error == 0) 59802a7780eSJan Kara error = EFSCORRUPTED; 599c92dc856SJan Kara 600c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 601c92dc856SJan Kara sbi->s_add_error_count++; 602c92dc856SJan Kara sbi->s_last_error_code = error; 603c92dc856SJan Kara sbi->s_last_error_line = line; 604c92dc856SJan Kara sbi->s_last_error_ino = ino; 605c92dc856SJan Kara sbi->s_last_error_block = block; 606c92dc856SJan Kara sbi->s_last_error_func = func; 607c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 608c92dc856SJan Kara if (!sbi->s_first_error_time) { 609c92dc856SJan Kara sbi->s_first_error_code = error; 610c92dc856SJan Kara sbi->s_first_error_line = line; 611c92dc856SJan Kara sbi->s_first_error_ino = ino; 612c92dc856SJan Kara sbi->s_first_error_block = block; 613c92dc856SJan Kara sbi->s_first_error_func = func; 614c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 61540676623SJan Kara } 616c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 61740676623SJan Kara } 61840676623SJan Kara 619ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 620ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 621ac27a0ecSDave Kleikamp * 622ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 623617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 624ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 625ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 626ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 627ac27a0ecSDave Kleikamp * write out the superblock safely. 628ac27a0ecSDave Kleikamp * 629dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 630d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 631ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 632014c9caaSJan Kara * 633014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 634014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 635014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 636014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 637014c9caaSJan Kara * at a critical moment in log management. 638ac27a0ecSDave Kleikamp */ 639e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 640e789ca0cSJan Kara __u32 ino, __u64 block, 641e789ca0cSJan Kara const char *func, unsigned int line) 642ac27a0ecSDave Kleikamp { 643b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6442d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 645b08070ecSJan Kara 646e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 647327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 648327eaf73STheodore Ts'o WARN_ON_ONCE(1); 649327eaf73STheodore Ts'o 6502d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6519b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 652ac27a0ecSDave Kleikamp if (journal) 653dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6542d01ddc8SJan Kara } 6552d01ddc8SJan Kara 6562d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6572d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6582d01ddc8SJan Kara /* 6592d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6602d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6612d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6622d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6632d01ddc8SJan Kara */ 6642d01ddc8SJan Kara if (continue_fs) 6652d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6662d01ddc8SJan Kara else 6672d01ddc8SJan Kara ext4_commit_super(sb); 6682d01ddc8SJan Kara } 6692d01ddc8SJan Kara 6701dc1097fSJan Kara /* 6711dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6721dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6731dc1097fSJan Kara * disabled. 6741dc1097fSJan Kara */ 675014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 676617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 677ac27a0ecSDave Kleikamp sb->s_id); 678ac27a0ecSDave Kleikamp } 679ac2f7ca5SYe Bin 680ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 681ac2f7ca5SYe Bin return; 682ac2f7ca5SYe Bin 683014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 684014c9caaSJan Kara /* 685014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 686014c9caaSJan Kara * ->s_flags update 687014c9caaSJan Kara */ 688014c9caaSJan Kara smp_wmb(); 689014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 6904327ba52SDaeho Jeong } 691ac27a0ecSDave Kleikamp 692c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 693c92dc856SJan Kara { 694c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 695c92dc856SJan Kara s_error_work); 6962d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 6972d01ddc8SJan Kara handle_t *handle; 698c92dc856SJan Kara 6992d01ddc8SJan Kara /* 7002d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7012d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7022d01ddc8SJan Kara * updates. 7032d01ddc8SJan Kara * 7042d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7052d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7062d01ddc8SJan Kara */ 7072d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 708558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7092d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7102d01ddc8SJan Kara if (IS_ERR(handle)) 7112d01ddc8SJan Kara goto write_directly; 712558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7132d01ddc8SJan Kara jbd2_journal_stop(handle); 7142d01ddc8SJan Kara goto write_directly; 7152d01ddc8SJan Kara } 7162d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 717558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 718558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 719558d6450SYe Bin "superblock detected"); 720558d6450SYe Bin clear_buffer_write_io_error(sbh); 721558d6450SYe Bin set_buffer_uptodate(sbh); 722558d6450SYe Bin } 723558d6450SYe Bin 724558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7252d01ddc8SJan Kara jbd2_journal_stop(handle); 7262d01ddc8SJan Kara goto write_directly; 7272d01ddc8SJan Kara } 7282d01ddc8SJan Kara jbd2_journal_stop(handle); 729d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7302d01ddc8SJan Kara return; 7312d01ddc8SJan Kara } 7322d01ddc8SJan Kara write_directly: 7332d01ddc8SJan Kara /* 7342d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7352d01ddc8SJan Kara * out and hope for the best. 7362d01ddc8SJan Kara */ 7374392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 738d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 739ac27a0ecSDave Kleikamp } 740ac27a0ecSDave Kleikamp 741efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 742efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 743efbed4dcSTheodore Ts'o "EXT4-fs error") 744efbed4dcSTheodore Ts'o 74512062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 746014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 74754d3adbcSTheodore Ts'o const char *fmt, ...) 748ac27a0ecSDave Kleikamp { 7490ff2ea7dSJoe Perches struct va_format vaf; 750ac27a0ecSDave Kleikamp va_list args; 751ac27a0ecSDave Kleikamp 7520db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7530db1ff22STheodore Ts'o return; 7540db1ff22STheodore Ts'o 755ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 756efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 757ac27a0ecSDave Kleikamp va_start(args, fmt); 7580ff2ea7dSJoe Perches vaf.fmt = fmt; 7590ff2ea7dSJoe Perches vaf.va = &args; 760efbed4dcSTheodore Ts'o printk(KERN_CRIT 761efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7620ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 763ac27a0ecSDave Kleikamp va_end(args); 764efbed4dcSTheodore Ts'o } 765e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 766ac27a0ecSDave Kleikamp } 767ac27a0ecSDave Kleikamp 768e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 76954d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 770273df556SFrank Mayhar const char *fmt, ...) 771273df556SFrank Mayhar { 772273df556SFrank Mayhar va_list args; 773f7c21177STheodore Ts'o struct va_format vaf; 774273df556SFrank Mayhar 7750db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7760db1ff22STheodore Ts'o return; 7770db1ff22STheodore Ts'o 778ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 779efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 780273df556SFrank Mayhar va_start(args, fmt); 781f7c21177STheodore Ts'o vaf.fmt = fmt; 782f7c21177STheodore Ts'o vaf.va = &args; 783c398eda0STheodore Ts'o if (block) 784d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 785d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 786d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 787d9ee81daSJoe Perches block, current->comm, &vaf); 788d9ee81daSJoe Perches else 789d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 790d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 791d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 792d9ee81daSJoe Perches current->comm, &vaf); 793273df556SFrank Mayhar va_end(args); 794efbed4dcSTheodore Ts'o } 795e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 79654d3adbcSTheodore Ts'o function, line); 797273df556SFrank Mayhar } 798273df556SFrank Mayhar 799e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 800f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 801f7c21177STheodore Ts'o const char *fmt, ...) 802273df556SFrank Mayhar { 803273df556SFrank Mayhar va_list args; 804f7c21177STheodore Ts'o struct va_format vaf; 805496ad9aaSAl Viro struct inode *inode = file_inode(file); 806273df556SFrank Mayhar char pathname[80], *path; 807273df556SFrank Mayhar 8080db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8090db1ff22STheodore Ts'o return; 8100db1ff22STheodore Ts'o 811ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 812efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8139bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 814f9a62d09SDan Carpenter if (IS_ERR(path)) 815273df556SFrank Mayhar path = "(unknown)"; 816f7c21177STheodore Ts'o va_start(args, fmt); 817f7c21177STheodore Ts'o vaf.fmt = fmt; 818f7c21177STheodore Ts'o vaf.va = &args; 819d9ee81daSJoe Perches if (block) 820d9ee81daSJoe Perches printk(KERN_CRIT 821d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 822d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 823d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 824d9ee81daSJoe Perches block, current->comm, path, &vaf); 825d9ee81daSJoe Perches else 826d9ee81daSJoe Perches printk(KERN_CRIT 827d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 828d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 829d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 830d9ee81daSJoe Perches current->comm, path, &vaf); 831273df556SFrank Mayhar va_end(args); 832efbed4dcSTheodore Ts'o } 833e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 83454d3adbcSTheodore Ts'o function, line); 835273df556SFrank Mayhar } 836273df556SFrank Mayhar 837722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 838ac27a0ecSDave Kleikamp char nbuf[16]) 839ac27a0ecSDave Kleikamp { 840ac27a0ecSDave Kleikamp char *errstr = NULL; 841ac27a0ecSDave Kleikamp 842ac27a0ecSDave Kleikamp switch (errno) { 8436a797d27SDarrick J. Wong case -EFSCORRUPTED: 8446a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8456a797d27SDarrick J. Wong break; 8466a797d27SDarrick J. Wong case -EFSBADCRC: 8476a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8486a797d27SDarrick J. Wong break; 849ac27a0ecSDave Kleikamp case -EIO: 850ac27a0ecSDave Kleikamp errstr = "IO failure"; 851ac27a0ecSDave Kleikamp break; 852ac27a0ecSDave Kleikamp case -ENOMEM: 853ac27a0ecSDave Kleikamp errstr = "Out of memory"; 854ac27a0ecSDave Kleikamp break; 855ac27a0ecSDave Kleikamp case -EROFS: 85678f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 85778f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 858ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 859ac27a0ecSDave Kleikamp else 860ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 861ac27a0ecSDave Kleikamp break; 862ac27a0ecSDave Kleikamp default: 863ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 864ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 865ac27a0ecSDave Kleikamp * NULL. */ 866ac27a0ecSDave Kleikamp if (nbuf) { 867ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 868ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 869ac27a0ecSDave Kleikamp errstr = nbuf; 870ac27a0ecSDave Kleikamp } 871ac27a0ecSDave Kleikamp break; 872ac27a0ecSDave Kleikamp } 873ac27a0ecSDave Kleikamp 874ac27a0ecSDave Kleikamp return errstr; 875ac27a0ecSDave Kleikamp } 876ac27a0ecSDave Kleikamp 877617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 878ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 879ac27a0ecSDave Kleikamp 880c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 881c398eda0STheodore Ts'o unsigned int line, int errno) 882ac27a0ecSDave Kleikamp { 883ac27a0ecSDave Kleikamp char nbuf[16]; 884ac27a0ecSDave Kleikamp const char *errstr; 885ac27a0ecSDave Kleikamp 8860db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 8870db1ff22STheodore Ts'o return; 8880db1ff22STheodore Ts'o 889ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 890ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 891ac27a0ecSDave Kleikamp * an error. */ 892bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 893ac27a0ecSDave Kleikamp return; 894ac27a0ecSDave Kleikamp 895efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 896617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 897c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 898c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 899efbed4dcSTheodore Ts'o } 900ac27a0ecSDave Kleikamp 901e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 902ac27a0ecSDave Kleikamp } 903ac27a0ecSDave Kleikamp 904e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 905e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 906b31e1552SEric Sandeen { 9070ff2ea7dSJoe Perches struct va_format vaf; 908b31e1552SEric Sandeen va_list args; 909b31e1552SEric Sandeen 9101cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 911efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 912efbed4dcSTheodore Ts'o return; 913efbed4dcSTheodore Ts'o 914b31e1552SEric Sandeen va_start(args, fmt); 9150ff2ea7dSJoe Perches vaf.fmt = fmt; 9160ff2ea7dSJoe Perches vaf.va = &args; 9170ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 918b31e1552SEric Sandeen va_end(args); 919b31e1552SEric Sandeen } 920b31e1552SEric Sandeen 9211cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9221cf006edSDmitry Monakhov { 9231cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9241cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9251cf006edSDmitry Monakhov "EXT4-fs warning"); 9261cf006edSDmitry Monakhov } 927b03a2f7eSAndreas Dilger 92812062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 929c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 930ac27a0ecSDave Kleikamp { 9310ff2ea7dSJoe Perches struct va_format vaf; 932ac27a0ecSDave Kleikamp va_list args; 933ac27a0ecSDave Kleikamp 934b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 935efbed4dcSTheodore Ts'o return; 936efbed4dcSTheodore Ts'o 937ac27a0ecSDave Kleikamp va_start(args, fmt); 9380ff2ea7dSJoe Perches vaf.fmt = fmt; 9390ff2ea7dSJoe Perches vaf.va = &args; 9400ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9410ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 942ac27a0ecSDave Kleikamp va_end(args); 943ac27a0ecSDave Kleikamp } 944ac27a0ecSDave Kleikamp 945b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 946b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 947b03a2f7eSAndreas Dilger { 948b03a2f7eSAndreas Dilger struct va_format vaf; 949b03a2f7eSAndreas Dilger va_list args; 950b03a2f7eSAndreas Dilger 951b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 952b03a2f7eSAndreas Dilger return; 953b03a2f7eSAndreas Dilger 954b03a2f7eSAndreas Dilger va_start(args, fmt); 955b03a2f7eSAndreas Dilger vaf.fmt = fmt; 956b03a2f7eSAndreas Dilger vaf.va = &args; 957b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 958b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 959b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 960b03a2f7eSAndreas Dilger va_end(args); 961b03a2f7eSAndreas Dilger } 962b03a2f7eSAndreas Dilger 963e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 964e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 965e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 966e29136f8STheodore Ts'o const char *fmt, ...) 9675d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9685d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9695d1b1b3fSAneesh Kumar K.V { 9700ff2ea7dSJoe Perches struct va_format vaf; 9715d1b1b3fSAneesh Kumar K.V va_list args; 9725d1b1b3fSAneesh Kumar K.V 9730db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9740db1ff22STheodore Ts'o return; 9750db1ff22STheodore Ts'o 976ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 977efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 9785d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 9790ff2ea7dSJoe Perches vaf.fmt = fmt; 9800ff2ea7dSJoe Perches vaf.va = &args; 98121149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 982e29136f8STheodore Ts'o sb->s_id, function, line, grp); 983e29136f8STheodore Ts'o if (ino) 9840ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 985e29136f8STheodore Ts'o if (block) 986efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 987efbed4dcSTheodore Ts'o (unsigned long long) block); 9880ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 9895d1b1b3fSAneesh Kumar K.V va_end(args); 990efbed4dcSTheodore Ts'o } 9915d1b1b3fSAneesh Kumar K.V 992c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 993327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 994327eaf73STheodore Ts'o WARN_ON_ONCE(1); 995e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 9962d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 9972d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 9982d01ddc8SJan Kara line); 999c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10002d01ddc8SJan Kara } 10015d1b1b3fSAneesh Kumar K.V return; 10025d1b1b3fSAneesh Kumar K.V } 10035d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1004e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10055d1b1b3fSAneesh Kumar K.V /* 10065d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10075d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10085d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10095d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10105d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 101125985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10125d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10135d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10145d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10155d1b1b3fSAneesh Kumar K.V */ 10165d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10175d1b1b3fSAneesh Kumar K.V return; 10185d1b1b3fSAneesh Kumar K.V } 10195d1b1b3fSAneesh Kumar K.V 1020db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1021db79e6d1SWang Shilong ext4_group_t group, 1022db79e6d1SWang Shilong unsigned int flags) 1023db79e6d1SWang Shilong { 1024db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1025db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1026db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10279af0b3d1SWang Shilong int ret; 1028db79e6d1SWang Shilong 10299af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10309af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10319af0b3d1SWang Shilong &grp->bb_state); 10329af0b3d1SWang Shilong if (!ret) 1033db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1034db79e6d1SWang Shilong grp->bb_free); 1035db79e6d1SWang Shilong } 1036db79e6d1SWang Shilong 10379af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10389af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10399af0b3d1SWang Shilong &grp->bb_state); 10409af0b3d1SWang Shilong if (!ret && gdp) { 1041db79e6d1SWang Shilong int count; 1042db79e6d1SWang Shilong 1043db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1044db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1045db79e6d1SWang Shilong count); 1046db79e6d1SWang Shilong } 1047db79e6d1SWang Shilong } 1048db79e6d1SWang Shilong } 1049db79e6d1SWang Shilong 1050617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1051ac27a0ecSDave Kleikamp { 1052617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1053ac27a0ecSDave Kleikamp 1054617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1055ac27a0ecSDave Kleikamp return; 1056ac27a0ecSDave Kleikamp 105712062dddSEric Sandeen ext4_warning(sb, 1058ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1059ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1060617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1061ac27a0ecSDave Kleikamp 1062617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1063617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1064617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1065ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1066ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1067ac27a0ecSDave Kleikamp 1068ac27a0ecSDave Kleikamp /* 1069ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1070ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1071ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1072ac27a0ecSDave Kleikamp */ 1073ac27a0ecSDave Kleikamp } 1074ac27a0ecSDave Kleikamp 1075ac27a0ecSDave Kleikamp /* 1076ac27a0ecSDave Kleikamp * Open the external journal device 1077ac27a0ecSDave Kleikamp */ 1078b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1079ac27a0ecSDave Kleikamp { 1080ac27a0ecSDave Kleikamp struct block_device *bdev; 1081ac27a0ecSDave Kleikamp 1082d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1083ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1084ac27a0ecSDave Kleikamp goto fail; 1085ac27a0ecSDave Kleikamp return bdev; 1086ac27a0ecSDave Kleikamp 1087ac27a0ecSDave Kleikamp fail: 1088ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1089ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1090ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1091ac27a0ecSDave Kleikamp return NULL; 1092ac27a0ecSDave Kleikamp } 1093ac27a0ecSDave Kleikamp 1094ac27a0ecSDave Kleikamp /* 1095ac27a0ecSDave Kleikamp * Release the journal device 1096ac27a0ecSDave Kleikamp */ 10974385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1098ac27a0ecSDave Kleikamp { 10994385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1100ac27a0ecSDave Kleikamp } 1101ac27a0ecSDave Kleikamp 11024385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1103ac27a0ecSDave Kleikamp { 1104ac27a0ecSDave Kleikamp struct block_device *bdev; 1105ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1106ac27a0ecSDave Kleikamp if (bdev) { 11074385bab1SAl Viro ext4_blkdev_put(bdev); 1108ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1109ac27a0ecSDave Kleikamp } 1110ac27a0ecSDave Kleikamp } 1111ac27a0ecSDave Kleikamp 1112ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1113ac27a0ecSDave Kleikamp { 1114617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1115ac27a0ecSDave Kleikamp } 1116ac27a0ecSDave Kleikamp 1117617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1118ac27a0ecSDave Kleikamp { 1119ac27a0ecSDave Kleikamp struct list_head *l; 1120ac27a0ecSDave Kleikamp 1121b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1122ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1123ac27a0ecSDave Kleikamp 1124ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1125ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1126ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1127ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1128ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1129ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1130ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1131ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1132ac27a0ecSDave Kleikamp } 1133ac27a0ecSDave Kleikamp } 1134ac27a0ecSDave Kleikamp 1135957153fcSJan Kara #ifdef CONFIG_QUOTA 1136957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1137957153fcSJan Kara 1138957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1139957153fcSJan Kara { 1140957153fcSJan Kara int type; 1141957153fcSJan Kara 1142957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1143957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1144957153fcSJan Kara ext4_quota_off(sb, type); 1145957153fcSJan Kara } 114633458eabSTheodore Ts'o 114733458eabSTheodore Ts'o /* 114833458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 114933458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 115033458eabSTheodore Ts'o */ 115133458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 115233458eabSTheodore Ts'o struct ext4_sb_info *sbi, 115333458eabSTheodore Ts'o int type) 115433458eabSTheodore Ts'o { 115533458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 115633458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 115733458eabSTheodore Ts'o } 1158957153fcSJan Kara #else 1159957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1160957153fcSJan Kara { 1161957153fcSJan Kara } 1162957153fcSJan Kara #endif 1163957153fcSJan Kara 1164617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1165ac27a0ecSDave Kleikamp { 1166617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1167617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11681d0c3924STheodore Ts'o struct buffer_head **group_desc; 11697c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 117097abd7d4STheodore Ts'o int aborted = 0; 1171ef2cabf7SHidehiro Kawai int i, err; 1172ac27a0ecSDave Kleikamp 1173857ac889SLukas Czerner ext4_unregister_li_request(sb); 1174957153fcSJan Kara ext4_quota_off_umount(sb); 1175e0ccfd95SChristoph Hellwig 1176c92dc856SJan Kara flush_work(&sbi->s_error_work); 11772e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 11784c0425ffSMingming Cao 11795e47868fSRitesh Harjani /* 11805e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 11815e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 11825e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 11835e47868fSRitesh Harjani */ 11845e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 11855e47868fSRitesh Harjani 11860390131bSFrank Mayhar if (sbi->s_journal) { 11874ba3fcddSZhang Yi jbd2_journal_unregister_shrinker(sbi->s_journal); 118897abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1189ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 119047b4a50bSJan Kara sbi->s_journal = NULL; 1191878520acSTheodore Ts'o if ((err < 0) && !aborted) { 119254d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 11930390131bSFrank Mayhar } 1194878520acSTheodore Ts'o } 1195d4edac31SJosef Bacik 1196d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 11979105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1198d4edac31SJosef Bacik ext4_release_system_zone(sb); 1199d4edac31SJosef Bacik ext4_mb_release(sb); 1200d4edac31SJosef Bacik ext4_ext_release(sb); 1201d4edac31SJosef Bacik 1202bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1203e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 1204ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1205ac27a0ecSDave Kleikamp } 1206bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12074392fbc4SJan Kara ext4_commit_super(sb); 1208a8e25a83SArtem Bityutskiy 12091d0c3924STheodore Ts'o rcu_read_lock(); 12101d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1211ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12121d0c3924STheodore Ts'o brelse(group_desc[i]); 12131d0c3924STheodore Ts'o kvfree(group_desc); 12147c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12157c990728SSuraj Jitindar Singh if (flex_groups) { 12167c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12177c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12187c990728SSuraj Jitindar Singh kvfree(flex_groups); 12197c990728SSuraj Jitindar Singh } 12201d0c3924STheodore Ts'o rcu_read_unlock(); 122157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1222ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1223ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 122457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1225efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1226bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1227ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1228a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 122933458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1230ac27a0ecSDave Kleikamp #endif 1231ac27a0ecSDave Kleikamp 1232ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1233ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1234ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1235ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1236ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1237ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1238837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1239ac27a0ecSDave Kleikamp 124089d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1241f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1242ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1243ac27a0ecSDave Kleikamp /* 1244ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1245ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1246ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1247ac27a0ecSDave Kleikamp */ 1248ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1249ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1250617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1251ac27a0ecSDave Kleikamp } 125250c15df6SChengguang Xu 1253dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1254dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 125550c15df6SChengguang Xu 125647387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 125747387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 125850c15df6SChengguang Xu 1259618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1260618f0031SPavel Skripkin 12619060dd2cSEric Sandeen brelse(sbi->s_sbh); 1262ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12633197ebdbSTheodore Ts'o /* 12643197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12653197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12663197ebdbSTheodore Ts'o */ 12673197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12683197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 12690441984aSDarrick J. Wong if (sbi->s_chksum_driver) 12700441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1271705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 12725e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1273ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 1274c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1275f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1276c83ad55eSGabriel Krisman Bertazi #endif 1277ac27a0ecSDave Kleikamp kfree(sbi); 1278ac27a0ecSDave Kleikamp } 1279ac27a0ecSDave Kleikamp 1280e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1281ac27a0ecSDave Kleikamp 1282ac27a0ecSDave Kleikamp /* 1283ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1284ac27a0ecSDave Kleikamp */ 1285617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1286ac27a0ecSDave Kleikamp { 1287617ba13bSMingming Cao struct ext4_inode_info *ei; 1288ac27a0ecSDave Kleikamp 1289e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1290ac27a0ecSDave Kleikamp if (!ei) 1291ac27a0ecSDave Kleikamp return NULL; 12920b8e58a1SAndreas Dilger 1293ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1294202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1295c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 129627bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1297c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 12989a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 12999a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1300edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1301eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1302edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1303dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1304d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1305d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13061dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1307a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1308a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 130996c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1310a9e7f447SDmitry Monakhov #endif 13118aefcd55STheodore Ts'o ei->jinode = NULL; 13122e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1313744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1314b436b9beSJan Kara ei->i_sync_tid = 0; 1315b436b9beSJan Kara ei->i_datasync_tid = 0; 1316e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13172e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1318aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1319aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1320ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1321ac27a0ecSDave Kleikamp } 1322ac27a0ecSDave Kleikamp 13237ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13247ff9c073STheodore Ts'o { 13257ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13267ff9c073STheodore Ts'o 132729b3692eSEric Biggers if (!drop) 132829b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 132929b3692eSEric Biggers 13307ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13317ff9c073STheodore Ts'o return drop; 13327ff9c073STheodore Ts'o } 13337ff9c073STheodore Ts'o 133494053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1335fa0d7e3dSNick Piggin { 13362c58d548SEric Biggers fscrypt_free_inode(inode); 1337aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1338aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1339aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1340aa75f4d3SHarshad Shirwadkar } 1341fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1342fa0d7e3dSNick Piggin } 1343fa0d7e3dSNick Piggin 1344617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1345ac27a0ecSDave Kleikamp { 13469f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1347b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1348b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1349b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13509f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13519f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13529f7dd93dSVasily Averin true); 13539f7dd93dSVasily Averin dump_stack(); 13549f7dd93dSVasily Averin } 1355ac27a0ecSDave Kleikamp } 1356ac27a0ecSDave Kleikamp 135751cc5068SAlexey Dobriyan static void init_once(void *foo) 1358ac27a0ecSDave Kleikamp { 1359617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1360ac27a0ecSDave Kleikamp 1361ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1362ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 13630e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1364ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1365ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1366aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1367ac27a0ecSDave Kleikamp } 1368ac27a0ecSDave Kleikamp 1369e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1370ac27a0ecSDave Kleikamp { 1371f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1372f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1373f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1374f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1375f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1376f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 137720c2df83SPaul Mundt init_once); 1378617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1379ac27a0ecSDave Kleikamp return -ENOMEM; 1380ac27a0ecSDave Kleikamp return 0; 1381ac27a0ecSDave Kleikamp } 1382ac27a0ecSDave Kleikamp 1383ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1384ac27a0ecSDave Kleikamp { 13858c0a8537SKirill A. Shutemov /* 13868c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 13878c0a8537SKirill A. Shutemov * destroy cache. 13888c0a8537SKirill A. Shutemov */ 13898c0a8537SKirill A. Shutemov rcu_barrier(); 1390617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1391ac27a0ecSDave Kleikamp } 1392ac27a0ecSDave Kleikamp 13930930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1394ac27a0ecSDave Kleikamp { 1395aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 13960930fcc1SAl Viro invalidate_inode_buffers(inode); 1397dbd5768fSJan Kara clear_inode(inode); 139827bc446eSbrookxu ext4_discard_preallocations(inode, 0); 139951865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1400f4c2d372SJan Kara dquot_drop(inode); 14018aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14028aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14038aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14048aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14058aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14068aefcd55STheodore Ts'o } 14073d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1408c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1409ac27a0ecSDave Kleikamp } 1410ac27a0ecSDave Kleikamp 14111b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14121b961ac0SChristoph Hellwig u64 ino, u32 generation) 1413ac27a0ecSDave Kleikamp { 1414ac27a0ecSDave Kleikamp struct inode *inode; 1415ac27a0ecSDave Kleikamp 14168a363970STheodore Ts'o /* 1417ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1418ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1419ac27a0ecSDave Kleikamp */ 14208a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14211d1fe1eeSDavid Howells if (IS_ERR(inode)) 14221d1fe1eeSDavid Howells return ERR_CAST(inode); 14231d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1424ac27a0ecSDave Kleikamp iput(inode); 1425ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1426ac27a0ecSDave Kleikamp } 14271b961ac0SChristoph Hellwig 14281b961ac0SChristoph Hellwig return inode; 1429ac27a0ecSDave Kleikamp } 14301b961ac0SChristoph Hellwig 14311b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14321b961ac0SChristoph Hellwig int fh_len, int fh_type) 14331b961ac0SChristoph Hellwig { 14341b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14351b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14361b961ac0SChristoph Hellwig } 14371b961ac0SChristoph Hellwig 14381b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14391b961ac0SChristoph Hellwig int fh_len, int fh_type) 14401b961ac0SChristoph Hellwig { 14411b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14421b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1443ac27a0ecSDave Kleikamp } 1444ac27a0ecSDave Kleikamp 1445fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1446fde87268STheodore Ts'o { 1447fde87268STheodore Ts'o struct writeback_control wbc = { 1448fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1449fde87268STheodore Ts'o }; 1450fde87268STheodore Ts'o 1451fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1452fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1453fde87268STheodore Ts'o } 1454fde87268STheodore Ts'o 1455643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1456a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1457a7550b30SJaegeuk Kim { 1458a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1459a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1460a7550b30SJaegeuk Kim } 1461a7550b30SJaegeuk Kim 1462a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1463a7550b30SJaegeuk Kim void *fs_data) 1464a7550b30SJaegeuk Kim { 14652f8f5e76SEric Biggers handle_t *handle = fs_data; 1466c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1467a7550b30SJaegeuk Kim 14689ce0151aSEric Biggers /* 14699ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 14709ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 14719ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 14729ce0151aSEric Biggers * the filename "lost+found" itself. 14739ce0151aSEric Biggers */ 14749ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 14759ce0151aSEric Biggers return -EPERM; 1476a7550b30SJaegeuk Kim 14777d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 14787d3e06a8SRoss Zwisler return -EINVAL; 14797d3e06a8SRoss Zwisler 1480b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1481b383a73fSIra Weiny return -EOPNOTSUPP; 1482b383a73fSIra Weiny 148394840e3cSEric Biggers res = ext4_convert_inline_data(inode); 148494840e3cSEric Biggers if (res) 148594840e3cSEric Biggers return res; 148694840e3cSEric Biggers 14872f8f5e76SEric Biggers /* 14882f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 14892f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 14902f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 14912f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 14922f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 14932f8f5e76SEric Biggers */ 14942f8f5e76SEric Biggers 14952f8f5e76SEric Biggers if (handle) { 14962f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 14972f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 14982f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 14992f8f5e76SEric Biggers ctx, len, 0); 1500a7550b30SJaegeuk Kim if (!res) { 1501a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1502a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1503a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1504a3caa24bSJan Kara /* 15052ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15062ee6a576SEric Biggers * S_DAX may be disabled 1507a3caa24bSJan Kara */ 1508043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1509a7550b30SJaegeuk Kim } 1510a7550b30SJaegeuk Kim return res; 1511a7550b30SJaegeuk Kim } 1512a7550b30SJaegeuk Kim 1513b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1514b8cb5a54STahsin Erdogan if (res) 1515b8cb5a54STahsin Erdogan return res; 15162f8f5e76SEric Biggers retry: 1517af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1518af65207cSTahsin Erdogan &credits); 1519dec214d0STahsin Erdogan if (res) 1520dec214d0STahsin Erdogan return res; 1521dec214d0STahsin Erdogan 1522c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1523a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1524a7550b30SJaegeuk Kim return PTR_ERR(handle); 1525a7550b30SJaegeuk Kim 15262f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15272f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15282f8f5e76SEric Biggers ctx, len, 0); 1529a7550b30SJaegeuk Kim if (!res) { 1530a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15312ee6a576SEric Biggers /* 15322ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15332ee6a576SEric Biggers * S_DAX may be disabled 15342ee6a576SEric Biggers */ 1535043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1536a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1537a7550b30SJaegeuk Kim if (res) 1538a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1539a7550b30SJaegeuk Kim } 1540a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15412f8f5e76SEric Biggers 15422f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15432f8f5e76SEric Biggers goto retry; 1544a7550b30SJaegeuk Kim if (!res) 1545a7550b30SJaegeuk Kim res = res2; 1546a7550b30SJaegeuk Kim return res; 1547a7550b30SJaegeuk Kim } 1548a7550b30SJaegeuk Kim 1549ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1550a7550b30SJaegeuk Kim { 1551ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1552a7550b30SJaegeuk Kim } 1553a7550b30SJaegeuk Kim 1554b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1555b925acb8SEric Biggers { 1556b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1557b925acb8SEric Biggers } 1558b925acb8SEric Biggers 1559b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1560b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1561b925acb8SEric Biggers { 1562b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1563b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1564b925acb8SEric Biggers } 1565b925acb8SEric Biggers 15666f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1567a5d431efSEric Biggers .key_prefix = "ext4:", 1568a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1569a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1570ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1571a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1572e12ee683SEric Biggers .max_namelen = EXT4_NAME_LEN, 1573b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1574b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1575a7550b30SJaegeuk Kim }; 1576a7550b30SJaegeuk Kim #endif 1577a7550b30SJaegeuk Kim 1578ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1579d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1580689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1581ac27a0ecSDave Kleikamp 1582617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1583617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1584617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1585617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1586617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15876f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15888c54ca9cSAl Viro const struct path *path); 1589617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1590617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1591ac27a0ecSDave Kleikamp size_t len, loff_t off); 1592617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1593ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 15947c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 15957c319d32SAditya Kali unsigned int flags); 15967c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1597ac27a0ecSDave Kleikamp 159896c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 159996c7e0d9SJan Kara { 160096c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 160196c7e0d9SJan Kara } 160296c7e0d9SJan Kara 160361e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 160460e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1605617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1606617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1607617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1608617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1609a5b5ee32SJan Kara .write_info = ext4_write_info, 1610a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1611a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1612040cb378SLi Xi .get_projid = ext4_get_projid, 16137a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1614ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1615ac27a0ecSDave Kleikamp }; 1616ac27a0ecSDave Kleikamp 16170d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1618617ba13bSMingming Cao .quota_on = ext4_quota_on, 1619ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1620287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16210a240339SJan Kara .get_state = dquot_get_state, 1622287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1623287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16246332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16256332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1626ac27a0ecSDave Kleikamp }; 1627ac27a0ecSDave Kleikamp #endif 1628ac27a0ecSDave Kleikamp 1629ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1630617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 163194053139SAl Viro .free_inode = ext4_free_in_core_inode, 1632617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1633617ba13bSMingming Cao .write_inode = ext4_write_inode, 1634617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16357ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16360930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1637617ba13bSMingming Cao .put_super = ext4_put_super, 1638617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1639c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1640c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1641617ba13bSMingming Cao .statfs = ext4_statfs, 1642617ba13bSMingming Cao .remount_fs = ext4_remount, 1643617ba13bSMingming Cao .show_options = ext4_show_options, 1644ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1645617ba13bSMingming Cao .quota_read = ext4_quota_read, 1646617ba13bSMingming Cao .quota_write = ext4_quota_write, 164796c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1648ac27a0ecSDave Kleikamp #endif 1649ac27a0ecSDave Kleikamp }; 1650ac27a0ecSDave Kleikamp 165139655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16521b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16531b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1654617ba13bSMingming Cao .get_parent = ext4_get_parent, 1655fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1656ac27a0ecSDave Kleikamp }; 1657ac27a0ecSDave Kleikamp 1658ac27a0ecSDave Kleikamp enum { 1659ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1660ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 166172578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1662ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 166372578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1664ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1665ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1666ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16676ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16684f74d15fSEric Biggers Opt_inlinecrypt, 1669ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 16705a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1671ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16729cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 16739cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1674327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1675327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1676670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 16771449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16785328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1679744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1680fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1681cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 168221175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 16838016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 168499c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16858016e29fSHarshad Shirwadkar #endif 1686ac27a0ecSDave Kleikamp }; 1687ac27a0ecSDave Kleikamp 1688a447c093SSteven Whitehouse static const match_table_t tokens = { 1689ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1690ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1691ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1692ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1693ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1694ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1695ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1696ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1697ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1698ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1699ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1700ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1701ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1702ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 170372578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 170472578c33STheodore Ts'o {Opt_removed, "orlov"}, 1705ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1706ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1707ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1708ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1709e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 17105a916be1STheodore Ts'o {Opt_noload, "noload"}, 171172578c33STheodore Ts'o {Opt_removed, "nobh"}, 171272578c33STheodore Ts'o {Opt_removed, "bh"}, 1713ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 171430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 171530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1716ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1717ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1718818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1719c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1720818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1721ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1722ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1723ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1724ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 17255bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 17265bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1727ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1728ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1729ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1730ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1731ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1732ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 17335a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1734ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1735ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1736ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1737ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 173849da9392SJan Kara {Opt_prjquota, "prjquota"}, 1739ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 174006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 174106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 174225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1743923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 17449cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 17459cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 17469cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1747c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 174864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1749327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1750327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1751a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1752a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1753670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1754dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 175536ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 175636ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 17576fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 17586fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1759240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1760b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1761afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 176206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 176306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1764744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1765244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1766744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 17675328e635SEric Sandeen {Opt_discard, "discard"}, 17685328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1769fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1770fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1771fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 17728016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 177399c880deSHarshad Shirwadkar {Opt_fc_debug_force, "fc_debug_force"}, 17748016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"}, 17758016e29fSHarshad Shirwadkar #endif 1776df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1777ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 17786ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 17794f74d15fSEric Biggers {Opt_inlinecrypt, "inlinecrypt"}, 1780cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1781cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 178221175ca4SHarshad Shirwadkar {Opt_removed, "prefetch_block_bitmaps"}, 178321175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, 1784196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, 1785c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1786c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1787c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1788c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1789c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1790f3f12faaSJosef Bacik {Opt_err, NULL}, 1791ac27a0ecSDave Kleikamp }; 1792ac27a0ecSDave Kleikamp 1793617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1794ac27a0ecSDave Kleikamp { 1795617ba13bSMingming Cao ext4_fsblk_t sb_block; 1796ac27a0ecSDave Kleikamp char *options = (char *) *data; 1797ac27a0ecSDave Kleikamp 1798ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1799ac27a0ecSDave Kleikamp return 1; /* Default location */ 18000b8e58a1SAndreas Dilger 1801ac27a0ecSDave Kleikamp options += 3; 18020b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1803ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1804ac27a0ecSDave Kleikamp if (*options && *options != ',') { 18054776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1806ac27a0ecSDave Kleikamp (char *) *data); 1807ac27a0ecSDave Kleikamp return 1; 1808ac27a0ecSDave Kleikamp } 1809ac27a0ecSDave Kleikamp if (*options == ',') 1810ac27a0ecSDave Kleikamp options++; 1811ac27a0ecSDave Kleikamp *data = (void *) options; 18120b8e58a1SAndreas Dilger 1813ac27a0ecSDave Kleikamp return sb_block; 1814ac27a0ecSDave Kleikamp } 1815ac27a0ecSDave Kleikamp 1816b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1817196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1818196e402aSHarshad Shirwadkar 1819d6006186SEric Biggers static const char deprecated_msg[] = 1820d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1821437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1822b3881f74STheodore Ts'o 182356c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 182456c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 182556c50f11SDmitry Monakhov { 182656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 182733458eabSTheodore Ts'o char *qname, *old_qname = get_qf_name(sb, sbi, qtype); 182803dafb5fSChen Gang int ret = -1; 182956c50f11SDmitry Monakhov 183033458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && !old_qname) { 183156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 183256c50f11SDmitry Monakhov "Cannot change journaled " 183356c50f11SDmitry Monakhov "quota options when quota turned on"); 183457f73c2cSTheodore Ts'o return -1; 183556c50f11SDmitry Monakhov } 1836e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1837c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1838c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1839c325a67cSTheodore Ts'o return 1; 1840262b4662SJan Kara } 184156c50f11SDmitry Monakhov qname = match_strdup(args); 184256c50f11SDmitry Monakhov if (!qname) { 184356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 184456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 184557f73c2cSTheodore Ts'o return -1; 184656c50f11SDmitry Monakhov } 184733458eabSTheodore Ts'o if (old_qname) { 184833458eabSTheodore Ts'o if (strcmp(old_qname, qname) == 0) 184903dafb5fSChen Gang ret = 1; 185003dafb5fSChen Gang else 185156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 185203dafb5fSChen Gang "%s quota file already specified", 185303dafb5fSChen Gang QTYPE2NAME(qtype)); 185403dafb5fSChen Gang goto errout; 185556c50f11SDmitry Monakhov } 185603dafb5fSChen Gang if (strchr(qname, '/')) { 185756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 185856c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 185903dafb5fSChen Gang goto errout; 186056c50f11SDmitry Monakhov } 186133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], qname); 1862fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 186356c50f11SDmitry Monakhov return 1; 186403dafb5fSChen Gang errout: 186503dafb5fSChen Gang kfree(qname); 186603dafb5fSChen Gang return ret; 186756c50f11SDmitry Monakhov } 186856c50f11SDmitry Monakhov 186956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 187056c50f11SDmitry Monakhov { 187156c50f11SDmitry Monakhov 187256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 187333458eabSTheodore Ts'o char *old_qname = get_qf_name(sb, sbi, qtype); 187456c50f11SDmitry Monakhov 187533458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && old_qname) { 187656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 187756c50f11SDmitry Monakhov " when quota turned on"); 187857f73c2cSTheodore Ts'o return -1; 187956c50f11SDmitry Monakhov } 188033458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], NULL); 188133458eabSTheodore Ts'o synchronize_rcu(); 188233458eabSTheodore Ts'o kfree(old_qname); 188356c50f11SDmitry Monakhov return 1; 188456c50f11SDmitry Monakhov } 188556c50f11SDmitry Monakhov #endif 188656c50f11SDmitry Monakhov 188726092bf5STheodore Ts'o #define MOPT_SET 0x0001 188826092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 188926092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 189026092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 189126092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 189226092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 189326092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 189426092bf5STheodore Ts'o #define MOPT_Q 0 189526092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 189626092bf5STheodore Ts'o #else 189726092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 189826092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 189926092bf5STheodore Ts'o #endif 190026092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 19018dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 19028dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 19038dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1904ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 19059cb20f94SIra Weiny #define MOPT_SKIP 0x0800 1906995a3ed6SHarshad Shirwadkar #define MOPT_2 0x1000 190726092bf5STheodore Ts'o 190826092bf5STheodore Ts'o static const struct mount_opts { 190926092bf5STheodore Ts'o int token; 191026092bf5STheodore Ts'o int mount_opt; 191126092bf5STheodore Ts'o int flags; 191226092bf5STheodore Ts'o } ext4_mount_opts[] = { 191326092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 191426092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 191526092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 191626092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 191726092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 191826092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 19198dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 19208dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 19218dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 19228dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 192326092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 192426092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 19258dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 19268dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19278dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 192859d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1929327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1930327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1931c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1932c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 19338dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 19341e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 193526092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 19368dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 19371e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19388dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 193926092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 194026092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 194126092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 19428dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 19437915a861SAles Novak MOPT_NO_EXT2}, 19448dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 19457915a861SAles Novak MOPT_NO_EXT2}, 194626092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 194726092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 194826092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 194926092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 195026092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 195126092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 195226092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 195326092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 195426092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 195526092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 19569cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 19579cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 19589cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 19599cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 19609cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 19619cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 19629cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 196326092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 19640efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 19650efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 19665ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 19675ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 19685ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 19698dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 19708dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 19718dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 19728dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 197326092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 197426092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 197526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 197626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 197726092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 197826092bf5STheodore Ts'o #else 197926092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 198026092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 198126092bf5STheodore Ts'o #endif 198226092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 198326092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1984670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 198526092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 198626092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 198726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 198826092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 198926092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 199049da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 199149da9392SJan Kara MOPT_SET | MOPT_Q}, 199226092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 199349da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 199449da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1995174fe5baSKaixu Xia {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING}, 1996174fe5baSKaixu Xia {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING}, 199726092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 199826092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 199926092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 200026092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 200126092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 2002df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 2003ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 2004cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 200521175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 20063d392b26STheodore Ts'o MOPT_SET}, 2007196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, 200899c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 20090f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 20100f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 20118016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, 0, MOPT_GTE0}, 20128016e29fSHarshad Shirwadkar #endif 201326092bf5STheodore Ts'o {Opt_err, 0, 0} 201426092bf5STheodore Ts'o }; 201526092bf5STheodore Ts'o 2016c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 2017c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 2018c83ad55eSGabriel Krisman Bertazi __u16 magic; 2019c83ad55eSGabriel Krisman Bertazi char *name; 2020c83ad55eSGabriel Krisman Bertazi char *version; 2021c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 2022c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 2023c83ad55eSGabriel Krisman Bertazi }; 2024c83ad55eSGabriel Krisman Bertazi 2025c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 2026c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 2027c83ad55eSGabriel Krisman Bertazi __u16 *flags) 2028c83ad55eSGabriel Krisman Bertazi { 2029c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 2030c83ad55eSGabriel Krisman Bertazi int i; 2031c83ad55eSGabriel Krisman Bertazi 2032c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 2033c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 2034c83ad55eSGabriel Krisman Bertazi break; 2035c83ad55eSGabriel Krisman Bertazi 2036c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 2037c83ad55eSGabriel Krisman Bertazi return -EINVAL; 2038c83ad55eSGabriel Krisman Bertazi 2039c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 2040c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 2041c83ad55eSGabriel Krisman Bertazi 2042c83ad55eSGabriel Krisman Bertazi return 0; 2043c83ad55eSGabriel Krisman Bertazi } 2044c83ad55eSGabriel Krisman Bertazi #endif 2045c83ad55eSGabriel Krisman Bertazi 2046ed318a6cSEric Biggers static int ext4_set_test_dummy_encryption(struct super_block *sb, 2047ed318a6cSEric Biggers const char *opt, 2048ed318a6cSEric Biggers const substring_t *arg, 2049ed318a6cSEric Biggers bool is_remount) 2050ed318a6cSEric Biggers { 2051ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 2052ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 2053ed318a6cSEric Biggers int err; 2054ed318a6cSEric Biggers 2055ed318a6cSEric Biggers /* 2056ed318a6cSEric Biggers * This mount option is just for testing, and it's not worthwhile to 2057ed318a6cSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 2058ed318a6cSEric Biggers * needed to allow it to be set or changed during remount. We do allow 2059ed318a6cSEric Biggers * it to be specified during remount, but only if there is no change. 2060ed318a6cSEric Biggers */ 2061ac4acb1fSEric Biggers if (is_remount && !sbi->s_dummy_enc_policy.policy) { 2062ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2063ed318a6cSEric Biggers "Can't set test_dummy_encryption on remount"); 2064ed318a6cSEric Biggers return -1; 2065ed318a6cSEric Biggers } 2066c8c868abSEric Biggers err = fscrypt_set_test_dummy_encryption(sb, arg->from, 2067ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2068ed318a6cSEric Biggers if (err) { 2069ed318a6cSEric Biggers if (err == -EEXIST) 2070ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2071ed318a6cSEric Biggers "Can't change test_dummy_encryption on remount"); 2072ed318a6cSEric Biggers else if (err == -EINVAL) 2073ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2074ed318a6cSEric Biggers "Value of option \"%s\" is unrecognized", opt); 2075ed318a6cSEric Biggers else 2076ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2077ed318a6cSEric Biggers "Error processing option \"%s\" [%d]", 2078ed318a6cSEric Biggers opt, err); 2079ed318a6cSEric Biggers return -1; 2080ed318a6cSEric Biggers } 2081ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2082ed318a6cSEric Biggers #else 2083ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2084ed318a6cSEric Biggers "Test dummy encryption mount option ignored"); 2085ed318a6cSEric Biggers #endif 2086ed318a6cSEric Biggers return 1; 2087ed318a6cSEric Biggers } 2088ed318a6cSEric Biggers 2089b237e304SHarshad Shirwadkar struct ext4_parsed_options { 2090b237e304SHarshad Shirwadkar unsigned long journal_devnum; 2091b237e304SHarshad Shirwadkar unsigned int journal_ioprio; 2092196e402aSHarshad Shirwadkar int mb_optimize_scan; 2093b237e304SHarshad Shirwadkar }; 2094b237e304SHarshad Shirwadkar 209526092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 2096b237e304SHarshad Shirwadkar substring_t *args, struct ext4_parsed_options *parsed_opts, 2097b237e304SHarshad Shirwadkar int is_remount) 209826092bf5STheodore Ts'o { 209926092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 210026092bf5STheodore Ts'o const struct mount_opts *m; 210108cefc7aSEric W. Biederman kuid_t uid; 210208cefc7aSEric W. Biederman kgid_t gid; 210326092bf5STheodore Ts'o int arg = 0; 210426092bf5STheodore Ts'o 210557f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 210657f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 210757f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 210857f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 210957f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 211057f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 211157f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 211257f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 211357f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 211457f73c2cSTheodore Ts'o #endif 211526092bf5STheodore Ts'o switch (token) { 2116f7048605STheodore Ts'o case Opt_noacl: 2117f7048605STheodore Ts'o case Opt_nouser_xattr: 2118f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 2119f7048605STheodore Ts'o break; 212026092bf5STheodore Ts'o case Opt_sb: 212126092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 212226092bf5STheodore Ts'o case Opt_removed: 21235f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 212426092bf5STheodore Ts'o return 1; 212526092bf5STheodore Ts'o case Opt_abort: 21269b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 212726092bf5STheodore Ts'o return 1; 212826092bf5STheodore Ts'o case Opt_i_version: 2129357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 213026092bf5STheodore Ts'o return 1; 2131a26f4992STheodore Ts'o case Opt_lazytime: 21321751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 2133a26f4992STheodore Ts'o return 1; 2134a26f4992STheodore Ts'o case Opt_nolazytime: 21351751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 2136a26f4992STheodore Ts'o return 1; 21374f74d15fSEric Biggers case Opt_inlinecrypt: 21384f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 21394f74d15fSEric Biggers sb->s_flags |= SB_INLINECRYPT; 21404f74d15fSEric Biggers #else 21414f74d15fSEric Biggers ext4_msg(sb, KERN_ERR, "inline encryption not supported"); 21424f74d15fSEric Biggers #endif 21434f74d15fSEric Biggers return 1; 214426092bf5STheodore Ts'o } 214526092bf5STheodore Ts'o 21465f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 21475f3633e3SJan Kara if (token == m->token) 21485f3633e3SJan Kara break; 21495f3633e3SJan Kara 21505f3633e3SJan Kara if (m->token == Opt_err) { 21515f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 21525f3633e3SJan Kara "or missing value", opt); 21535f3633e3SJan Kara return -1; 21545f3633e3SJan Kara } 21555f3633e3SJan Kara 21568dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 21578dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 21588dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 21598dc0aa8cSTheodore Ts'o return -1; 21608dc0aa8cSTheodore Ts'o } 21618dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 21628dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 21638dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 21648dc0aa8cSTheodore Ts'o return -1; 21658dc0aa8cSTheodore Ts'o } 21668dc0aa8cSTheodore Ts'o 2167ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 21680efb3b23SJan Kara return -1; 216926092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 217026092bf5STheodore Ts'o return -1; 2171c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 2172c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 217326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 21741e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 21751e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 2176c93cf2d7SDmitry Monakhov } else 2177c93cf2d7SDmitry Monakhov return -1; 2178c93cf2d7SDmitry Monakhov } 217926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 218026092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 218126092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 218226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 218326092bf5STheodore Ts'o "options when quota turned on"); 218426092bf5STheodore Ts'o return -1; 218526092bf5STheodore Ts'o } 218626092bf5STheodore Ts'o 218726092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 218826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 218926092bf5STheodore Ts'o } else if (token == Opt_commit) { 219026092bf5STheodore Ts'o if (arg == 0) 219126092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 21929ba55543Szhangyi (F) else if (arg > INT_MAX / HZ) { 21939ba55543Szhangyi (F) ext4_msg(sb, KERN_ERR, 21949ba55543Szhangyi (F) "Invalid commit interval %d, " 21959ba55543Szhangyi (F) "must be smaller than %d", 21969ba55543Szhangyi (F) arg, INT_MAX / HZ); 21979ba55543Szhangyi (F) return -1; 21989ba55543Szhangyi (F) } 219926092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 2200670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 22019803387cSTheodore Ts'o if ((arg & 1) || 22029803387cSTheodore Ts'o (arg < 4) || 22039803387cSTheodore Ts'o (arg > (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { 22049803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 22059803387cSTheodore Ts'o "Invalid want_extra_isize %d", arg); 22069803387cSTheodore Ts'o return -1; 22079803387cSTheodore Ts'o } 2208670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 220926092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 221026092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 221126092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 221226092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 221326092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2214e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 2215e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 2216e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2217e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 221826092bf5STheodore Ts'o return -1; 221926092bf5STheodore Ts'o } 222026092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 222126092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 222226092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 222326092bf5STheodore Ts'o if (!args->from) 222426092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 222526092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 2226df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 2227df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 22288016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 22298016e29fSHarshad Shirwadkar } else if (token == Opt_fc_debug_max_replay) { 22308016e29fSHarshad Shirwadkar sbi->s_fc_debug_max_replay = arg; 22318016e29fSHarshad Shirwadkar #endif 223226092bf5STheodore Ts'o } else if (token == Opt_stripe) { 223326092bf5STheodore Ts'o sbi->s_stripe = arg; 22340efb3b23SJan Kara } else if (token == Opt_resuid) { 22350efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 22360efb3b23SJan Kara if (!uid_valid(uid)) { 22375f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 22380efb3b23SJan Kara return -1; 22390efb3b23SJan Kara } 22400efb3b23SJan Kara sbi->s_resuid = uid; 22410efb3b23SJan Kara } else if (token == Opt_resgid) { 22420efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 22430efb3b23SJan Kara if (!gid_valid(gid)) { 22445f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 22450efb3b23SJan Kara return -1; 22460efb3b23SJan Kara } 22470efb3b23SJan Kara sbi->s_resgid = gid; 22480efb3b23SJan Kara } else if (token == Opt_journal_dev) { 22490efb3b23SJan Kara if (is_remount) { 22500efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 22510efb3b23SJan Kara "Cannot specify journal on remount"); 22520efb3b23SJan Kara return -1; 22530efb3b23SJan Kara } 2254b237e304SHarshad Shirwadkar parsed_opts->journal_devnum = arg; 2255ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2256ad4eec61SEric Sandeen char *journal_path; 2257ad4eec61SEric Sandeen struct inode *journal_inode; 2258ad4eec61SEric Sandeen struct path path; 2259ad4eec61SEric Sandeen int error; 2260ad4eec61SEric Sandeen 2261ad4eec61SEric Sandeen if (is_remount) { 2262ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 2263ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2264ad4eec61SEric Sandeen return -1; 2265ad4eec61SEric Sandeen } 2266ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 2267ad4eec61SEric Sandeen if (!journal_path) { 2268ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 2269ad4eec61SEric Sandeen "journal device string"); 2270ad4eec61SEric Sandeen return -1; 2271ad4eec61SEric Sandeen } 2272ad4eec61SEric Sandeen 2273ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 2274ad4eec61SEric Sandeen if (error) { 2275ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 2276ad4eec61SEric Sandeen "journal device path: error %d", error); 2277ad4eec61SEric Sandeen kfree(journal_path); 2278ad4eec61SEric Sandeen return -1; 2279ad4eec61SEric Sandeen } 2280ad4eec61SEric Sandeen 22812b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2282ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 2283ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 2284ad4eec61SEric Sandeen "is not a block device", journal_path); 2285ad4eec61SEric Sandeen path_put(&path); 2286ad4eec61SEric Sandeen kfree(journal_path); 2287ad4eec61SEric Sandeen return -1; 2288ad4eec61SEric Sandeen } 2289ad4eec61SEric Sandeen 2290b237e304SHarshad Shirwadkar parsed_opts->journal_devnum = new_encode_dev(journal_inode->i_rdev); 2291ad4eec61SEric Sandeen path_put(&path); 2292ad4eec61SEric Sandeen kfree(journal_path); 22930efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 22940efb3b23SJan Kara if (arg > 7) { 22955f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 22960efb3b23SJan Kara " (must be 0-7)"); 22970efb3b23SJan Kara return -1; 22980efb3b23SJan Kara } 2299b237e304SHarshad Shirwadkar parsed_opts->journal_ioprio = 23000efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 23016ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 2302ed318a6cSEric Biggers return ext4_set_test_dummy_encryption(sb, opt, &args[0], 2303ed318a6cSEric Biggers is_remount); 230426092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 230526092bf5STheodore Ts'o if (is_remount) { 230626092bf5STheodore Ts'o if (!sbi->s_journal) 230726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 23085f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 230926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 231026092bf5STheodore Ts'o "Cannot change data mode on remount"); 231126092bf5STheodore Ts'o return -1; 231226092bf5STheodore Ts'o } 231326092bf5STheodore Ts'o } else { 231426092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 231526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 231626092bf5STheodore Ts'o } 231726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 231826092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 231926092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 232026092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 23215f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 23225f3633e3SJan Kara "quota options when quota turned on"); 232326092bf5STheodore Ts'o return -1; 232426092bf5STheodore Ts'o } 2325e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 2326c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 2327c325a67cSTheodore Ts'o "Quota format mount options ignored " 2328262b4662SJan Kara "when QUOTA feature is enabled"); 2329c325a67cSTheodore Ts'o return 1; 2330262b4662SJan Kara } 233126092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 233226092bf5STheodore Ts'o #endif 23339cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 23349cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2335ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 23369cb20f94SIra Weiny switch (token) { 23379cb20f94SIra Weiny case Opt_dax: 23389cb20f94SIra Weiny case Opt_dax_always: 2339829b37b8STheodore Ts'o if (is_remount && 2340829b37b8STheodore Ts'o (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2341829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 2342829b37b8STheodore Ts'o fail_dax_change_remount: 2343829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't change " 2344829b37b8STheodore Ts'o "dax mount option while remounting"); 2345829b37b8STheodore Ts'o return -1; 2346829b37b8STheodore Ts'o } 2347829b37b8STheodore Ts'o if (is_remount && 2348829b37b8STheodore Ts'o (test_opt(sb, DATA_FLAGS) == 2349829b37b8STheodore Ts'o EXT4_MOUNT_JOURNAL_DATA)) { 2350829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 2351829b37b8STheodore Ts'o "both data=journal and dax"); 2352829b37b8STheodore Ts'o return -1; 2353829b37b8STheodore Ts'o } 2354ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 2355ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 23569cb20f94SIra Weiny sbi->s_mount_opt |= EXT4_MOUNT_DAX_ALWAYS; 23579cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 23589cb20f94SIra Weiny break; 23599cb20f94SIra Weiny case Opt_dax_never: 2360829b37b8STheodore Ts'o if (is_remount && 2361829b37b8STheodore Ts'o (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2362829b37b8STheodore Ts'o (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) 2363829b37b8STheodore Ts'o goto fail_dax_change_remount; 23649cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 23659cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 23669cb20f94SIra Weiny break; 23679cb20f94SIra Weiny case Opt_dax_inode: 2368829b37b8STheodore Ts'o if (is_remount && 2369829b37b8STheodore Ts'o ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2370829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2371829b37b8STheodore Ts'o !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) 2372829b37b8STheodore Ts'o goto fail_dax_change_remount; 23739cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 23749cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 23759cb20f94SIra Weiny /* Strictly for printing options */ 23769cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_INODE; 23779cb20f94SIra Weiny break; 23789cb20f94SIra Weiny } 2379ef83b6e8SDan Williams #else 2380923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 23819cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 23829cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 2383923ae0ffSRoss Zwisler return -1; 2384923ae0ffSRoss Zwisler #endif 23857915a861SAles Novak } else if (token == Opt_data_err_abort) { 23867915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 23877915a861SAles Novak } else if (token == Opt_data_err_ignore) { 23887915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 2389196e402aSHarshad Shirwadkar } else if (token == Opt_mb_optimize_scan) { 2390196e402aSHarshad Shirwadkar if (arg != 0 && arg != 1) { 2391196e402aSHarshad Shirwadkar ext4_msg(sb, KERN_WARNING, 2392196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2393196e402aSHarshad Shirwadkar return -1; 2394196e402aSHarshad Shirwadkar } 2395196e402aSHarshad Shirwadkar parsed_opts->mb_optimize_scan = arg; 239626092bf5STheodore Ts'o } else { 239726092bf5STheodore Ts'o if (!args->from) 239826092bf5STheodore Ts'o arg = 1; 239926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 240026092bf5STheodore Ts'o arg = !arg; 240126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 240226092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 240326092bf5STheodore Ts'o "buggy handling of option %s", opt); 240426092bf5STheodore Ts'o WARN_ON(1); 240526092bf5STheodore Ts'o return -1; 240626092bf5STheodore Ts'o } 2407995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2408995a3ed6SHarshad Shirwadkar if (arg != 0) 2409995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 |= m->mount_opt; 2410995a3ed6SHarshad Shirwadkar else 2411995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 &= ~m->mount_opt; 2412995a3ed6SHarshad Shirwadkar } else { 241326092bf5STheodore Ts'o if (arg != 0) 241426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 241526092bf5STheodore Ts'o else 241626092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 241726092bf5STheodore Ts'o } 2418995a3ed6SHarshad Shirwadkar } 241926092bf5STheodore Ts'o return 1; 242026092bf5STheodore Ts'o } 242126092bf5STheodore Ts'o 2422ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 2423b237e304SHarshad Shirwadkar struct ext4_parsed_options *ret_opts, 2424661aa520SEric Sandeen int is_remount) 2425ac27a0ecSDave Kleikamp { 24261e1a76edSOlof Johansson struct ext4_sb_info __maybe_unused *sbi = EXT4_SB(sb); 242733458eabSTheodore Ts'o char *p, __maybe_unused *usr_qf_name, __maybe_unused *grp_qf_name; 2428ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 242926092bf5STheodore Ts'o int token; 2430ac27a0ecSDave Kleikamp 2431ac27a0ecSDave Kleikamp if (!options) 2432ac27a0ecSDave Kleikamp return 1; 2433ac27a0ecSDave Kleikamp 2434ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 2435ac27a0ecSDave Kleikamp if (!*p) 2436ac27a0ecSDave Kleikamp continue; 243715121c18SEric Sandeen /* 243815121c18SEric Sandeen * Initialize args struct so we know whether arg was 243915121c18SEric Sandeen * found; some options take optional arguments. 244015121c18SEric Sandeen */ 2441caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 2442ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 2443b237e304SHarshad Shirwadkar if (handle_mount_opt(sb, p, token, args, ret_opts, 2444b237e304SHarshad Shirwadkar is_remount) < 0) 2445ac27a0ecSDave Kleikamp return 0; 2446ac27a0ecSDave Kleikamp } 2447ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 244849da9392SJan Kara /* 244949da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 245049da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 245149da9392SJan Kara * to support legacy quotas in quota files. 245249da9392SJan Kara */ 245349da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 245449da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 245549da9392SJan Kara "Cannot enable project quota enforcement."); 245649da9392SJan Kara return 0; 245749da9392SJan Kara } 245833458eabSTheodore Ts'o usr_qf_name = get_qf_name(sb, sbi, USRQUOTA); 245933458eabSTheodore Ts'o grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA); 246033458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 246133458eabSTheodore Ts'o if (test_opt(sb, USRQUOTA) && usr_qf_name) 2462fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 2463ac27a0ecSDave Kleikamp 246433458eabSTheodore Ts'o if (test_opt(sb, GRPQUOTA) && grp_qf_name) 2465fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2466ac27a0ecSDave Kleikamp 246756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2468b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 2469b31e1552SEric Sandeen "format mixing"); 2470ac27a0ecSDave Kleikamp return 0; 2471ac27a0ecSDave Kleikamp } 2472ac27a0ecSDave Kleikamp 2473ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2474b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 2475b31e1552SEric Sandeen "not specified"); 2476ac27a0ecSDave Kleikamp return 0; 2477ac27a0ecSDave Kleikamp } 2478ac27a0ecSDave Kleikamp } 2479ac27a0ecSDave Kleikamp #endif 2480626b035bSRitesh Harjani if (test_opt(sb, DIOREAD_NOLOCK)) { 2481626b035bSRitesh Harjani int blocksize = 2482626b035bSRitesh Harjani BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2483626b035bSRitesh Harjani if (blocksize < PAGE_SIZE) 2484626b035bSRitesh Harjani ext4_msg(sb, KERN_WARNING, "Warning: mounting with an " 2485626b035bSRitesh Harjani "experimental mount option 'dioread_nolock' " 2486626b035bSRitesh Harjani "for blocksize < PAGE_SIZE"); 2487626b035bSRitesh Harjani } 2488ac27a0ecSDave Kleikamp return 1; 2489ac27a0ecSDave Kleikamp } 2490ac27a0ecSDave Kleikamp 24912adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 24922adf6da8STheodore Ts'o struct super_block *sb) 24932adf6da8STheodore Ts'o { 24942adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 24952adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 249633458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 24972adf6da8STheodore Ts'o 24982adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 24992adf6da8STheodore Ts'o char *fmtname = ""; 25002adf6da8STheodore Ts'o 25012adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 25022adf6da8STheodore Ts'o case QFMT_VFS_OLD: 25032adf6da8STheodore Ts'o fmtname = "vfsold"; 25042adf6da8STheodore Ts'o break; 25052adf6da8STheodore Ts'o case QFMT_VFS_V0: 25062adf6da8STheodore Ts'o fmtname = "vfsv0"; 25072adf6da8STheodore Ts'o break; 25082adf6da8STheodore Ts'o case QFMT_VFS_V1: 25092adf6da8STheodore Ts'o fmtname = "vfsv1"; 25102adf6da8STheodore Ts'o break; 25112adf6da8STheodore Ts'o } 25122adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 25132adf6da8STheodore Ts'o } 25142adf6da8STheodore Ts'o 251533458eabSTheodore Ts'o rcu_read_lock(); 251633458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 251733458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 251833458eabSTheodore Ts'o if (usr_qf_name) 251933458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 252033458eabSTheodore Ts'o if (grp_qf_name) 252133458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 252233458eabSTheodore Ts'o rcu_read_unlock(); 25232adf6da8STheodore Ts'o #endif 25242adf6da8STheodore Ts'o } 25252adf6da8STheodore Ts'o 25265a916be1STheodore Ts'o static const char *token2str(int token) 25275a916be1STheodore Ts'o { 252850df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 25295a916be1STheodore Ts'o 25305a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 25315a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 25325a916be1STheodore Ts'o break; 25335a916be1STheodore Ts'o return t->pattern; 25345a916be1STheodore Ts'o } 25355a916be1STheodore Ts'o 25362adf6da8STheodore Ts'o /* 25372adf6da8STheodore Ts'o * Show an option if 25382adf6da8STheodore Ts'o * - it's set to a non-default value OR 25392adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 25402adf6da8STheodore Ts'o */ 254166acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 254266acdcf4STheodore Ts'o int nodefs) 25432adf6da8STheodore Ts'o { 25442adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 25452adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 254668afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 25475a916be1STheodore Ts'o const struct mount_opts *m; 254866acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 25492adf6da8STheodore Ts'o 255066acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 255166acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 25522adf6da8STheodore Ts'o 25532adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 25545a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 25555a916be1STheodore Ts'o 25565a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 25575a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 25585a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 25599cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 25605a916be1STheodore Ts'o continue; 256168afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 25625a916be1STheodore Ts'o continue; /* skip if same as the default */ 25635a916be1STheodore Ts'o if ((want_set && 25645a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 25655a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 25665a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 25675a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 25685a916be1STheodore Ts'o } 25695a916be1STheodore Ts'o 257008cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 25715a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 257208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 257308cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 257408cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 25755a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 257608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 257708cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 257866acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 25795a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 25805a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 25812adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 25825a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 25832adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 25845a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 258566acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 25865a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 258766acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 25885a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 258966acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 25905a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2591357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 25925a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 259366acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 25945a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 259568afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 259668afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 25972adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 25985a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 25992adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 26005a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 26012adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 26025a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 26035a916be1STheodore Ts'o } 260466acdcf4STheodore Ts'o if (nodefs || 260566acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 26065a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 26072adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 26082adf6da8STheodore Ts'o 2609ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 261066acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 26115a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2612df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2613df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 26147915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 26157915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2616ed318a6cSEric Biggers 2617ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 26182adf6da8STheodore Ts'o 26194f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 26204f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 26214f74d15fSEric Biggers 26229cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 26239cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 26249cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 26259cb20f94SIra Weiny else 26269cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 26279cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 26289cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 26299cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 26309cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 26319cb20f94SIra Weiny } 26322adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 26332adf6da8STheodore Ts'o return 0; 26342adf6da8STheodore Ts'o } 26352adf6da8STheodore Ts'o 263666acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 263766acdcf4STheodore Ts'o { 263866acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 263966acdcf4STheodore Ts'o } 264066acdcf4STheodore Ts'o 2641ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 264266acdcf4STheodore Ts'o { 264366acdcf4STheodore Ts'o struct super_block *sb = seq->private; 264466acdcf4STheodore Ts'o int rc; 264566acdcf4STheodore Ts'o 2646bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 264766acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 264866acdcf4STheodore Ts'o seq_puts(seq, "\n"); 264966acdcf4STheodore Ts'o return rc; 265066acdcf4STheodore Ts'o } 265166acdcf4STheodore Ts'o 2652617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2653ac27a0ecSDave Kleikamp int read_only) 2654ac27a0ecSDave Kleikamp { 2655617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2656c89128a0SJaegeuk Kim int err = 0; 2657ac27a0ecSDave Kleikamp 2658617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2659b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2660b31e1552SEric Sandeen "forcing read-only mode"); 2661c89128a0SJaegeuk Kim err = -EROFS; 26625adaccacSyangerkun goto done; 2663ac27a0ecSDave Kleikamp } 2664ac27a0ecSDave Kleikamp if (read_only) 2665281b5995STheodore Ts'o goto done; 2666617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2667b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2668b31e1552SEric Sandeen "running e2fsck is recommended"); 2669c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2670b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2671b31e1552SEric Sandeen "warning: mounting fs with errors, " 2672b31e1552SEric Sandeen "running e2fsck is recommended"); 2673ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2674ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2675ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2676b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2677b31e1552SEric Sandeen "warning: maximal mount count reached, " 2678b31e1552SEric Sandeen "running e2fsck is recommended"); 2679ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 26806a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 26816a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2682b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2683b31e1552SEric Sandeen "warning: checktime reached, " 2684b31e1552SEric Sandeen "running e2fsck is recommended"); 26850390131bSFrank Mayhar if (!sbi->s_journal) 2686216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2687ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2688617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2689e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 26906a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 26910390131bSFrank Mayhar if (sbi->s_journal) 2692e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2693ac27a0ecSDave Kleikamp 26944392fbc4SJan Kara err = ext4_commit_super(sb); 2695281b5995STheodore Ts'o done: 2696ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2697a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2698a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2699ac27a0ecSDave Kleikamp sb->s_blocksize, 2700ac27a0ecSDave Kleikamp sbi->s_groups_count, 2701617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2702617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2703a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2704ac27a0ecSDave Kleikamp 27057abc52c2SDan Magenheimer cleancache_init_fs(sb); 2706c89128a0SJaegeuk Kim return err; 2707ac27a0ecSDave Kleikamp } 2708ac27a0ecSDave Kleikamp 2709117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2710117fff10STheodore Ts'o { 2711117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 27127c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 271337b0b6b8SDan Carpenter int size, i, j; 2714117fff10STheodore Ts'o 2715117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2716117fff10STheodore Ts'o return 0; 2717117fff10STheodore Ts'o 2718117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2719117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2720117fff10STheodore Ts'o return 0; 2721117fff10STheodore Ts'o 27227c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 27237c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 2724117fff10STheodore Ts'o if (!new_groups) { 27257c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 27267c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 2727117fff10STheodore Ts'o return -ENOMEM; 2728117fff10STheodore Ts'o } 27297c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 27307c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 27317c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 27327c990728SSuraj Jitindar Singh GFP_KERNEL); 27337c990728SSuraj Jitindar Singh if (!new_groups[i]) { 273437b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 273537b0b6b8SDan Carpenter kvfree(new_groups[j]); 27367c990728SSuraj Jitindar Singh kvfree(new_groups); 27377c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 27387c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 27397c990728SSuraj Jitindar Singh return -ENOMEM; 2740117fff10STheodore Ts'o } 27417c990728SSuraj Jitindar Singh } 27427c990728SSuraj Jitindar Singh rcu_read_lock(); 27437c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 27447c990728SSuraj Jitindar Singh if (old_groups) 27457c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 27467c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 27477c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 27487c990728SSuraj Jitindar Singh rcu_read_unlock(); 27497c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 27507c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 27517c990728SSuraj Jitindar Singh if (old_groups) 27527c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 2753117fff10STheodore Ts'o return 0; 2754117fff10STheodore Ts'o } 2755117fff10STheodore Ts'o 2756772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2757772cb7c8SJose R. Santos { 2758772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2759772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 27607c990728SSuraj Jitindar Singh struct flex_groups *fg; 2761772cb7c8SJose R. Santos ext4_group_t flex_group; 2762117fff10STheodore Ts'o int i, err; 2763772cb7c8SJose R. Santos 2764503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2765d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2766772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2767772cb7c8SJose R. Santos return 1; 2768772cb7c8SJose R. Santos } 2769772cb7c8SJose R. Santos 2770117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2771117fff10STheodore Ts'o if (err) 2772772cb7c8SJose R. Santos goto failed; 2773772cb7c8SJose R. Santos 2774772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 277588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2776772cb7c8SJose R. Santos 2777772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 27787c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 27797c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 278090ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 27817c990728SSuraj Jitindar Singh &fg->free_clusters); 27827c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 2783772cb7c8SJose R. Santos } 2784772cb7c8SJose R. Santos 2785772cb7c8SJose R. Santos return 1; 2786772cb7c8SJose R. Santos failed: 2787772cb7c8SJose R. Santos return 0; 2788772cb7c8SJose R. Santos } 2789772cb7c8SJose R. Santos 2790e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2791717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2792717d50e4SAndreas Dilger { 2793b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2794717d50e4SAndreas Dilger __u16 crc = 0; 2795717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2796e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2797717d50e4SAndreas Dilger 27989aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2799feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2800feb0ab32SDarrick J. Wong __u32 csum32; 2801b47820edSDaeho Jeong __u16 dummy_csum = 0; 2802feb0ab32SDarrick J. Wong 2803feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2804feb0ab32SDarrick J. Wong sizeof(le_group)); 2805b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2806b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2807b47820edSDaeho Jeong sizeof(dummy_csum)); 2808b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2809b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2810b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2811b47820edSDaeho Jeong sbi->s_desc_size - offset); 2812feb0ab32SDarrick J. Wong 2813feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2814feb0ab32SDarrick J. Wong goto out; 2815feb0ab32SDarrick J. Wong } 2816feb0ab32SDarrick J. Wong 2817feb0ab32SDarrick J. Wong /* old crc16 code */ 2818e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2819813d32f9SDarrick J. Wong return 0; 2820813d32f9SDarrick J. Wong 2821717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2822717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2823717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2824717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2825717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2826e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2827717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2828717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2829717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2830717d50e4SAndreas Dilger offset); 2831717d50e4SAndreas Dilger 2832feb0ab32SDarrick J. Wong out: 2833717d50e4SAndreas Dilger return cpu_to_le16(crc); 2834717d50e4SAndreas Dilger } 2835717d50e4SAndreas Dilger 2836feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2837717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2838717d50e4SAndreas Dilger { 2839feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2840e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2841717d50e4SAndreas Dilger return 0; 2842717d50e4SAndreas Dilger 2843717d50e4SAndreas Dilger return 1; 2844717d50e4SAndreas Dilger } 2845717d50e4SAndreas Dilger 2846feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2847feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2848feb0ab32SDarrick J. Wong { 2849feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2850feb0ab32SDarrick J. Wong return; 2851e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2852feb0ab32SDarrick J. Wong } 2853feb0ab32SDarrick J. Wong 2854ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2855bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2856829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2857bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2858ac27a0ecSDave Kleikamp { 2859617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2860617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2861617ba13bSMingming Cao ext4_fsblk_t last_block; 286244de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 2863bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2864bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2865bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2866ce421581SJose R. Santos int flexbg_flag = 0; 2867bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2868ac27a0ecSDave Kleikamp 2869e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2870ce421581SJose R. Santos flexbg_flag = 1; 2871ce421581SJose R. Santos 2872617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2873ac27a0ecSDave Kleikamp 2874197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2875197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2876197cd65aSAkinobu Mita 2877ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2878bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2879ac27a0ecSDave Kleikamp else 2880ac27a0ecSDave Kleikamp last_block = first_block + 2881617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2882ac27a0ecSDave Kleikamp 2883bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2884bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2885bfff6873SLukas Czerner grp = i; 2886bfff6873SLukas Czerner 28878fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2888829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2889829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2890829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2891829fa70dSTheodore Ts'o "superblock", i); 289218db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 289318db4b4eSTheodore Ts'o return 0; 2894829fa70dSTheodore Ts'o } 289577260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 289677260807STheodore Ts'o block_bitmap <= last_bg_block) { 289777260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 289877260807STheodore Ts'o "Block bitmap for group %u overlaps " 289977260807STheodore Ts'o "block group descriptors", i); 290077260807STheodore Ts'o if (!sb_rdonly(sb)) 290177260807STheodore Ts'o return 0; 290277260807STheodore Ts'o } 29032b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2904b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2905a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2906b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2907ac27a0ecSDave Kleikamp return 0; 2908ac27a0ecSDave Kleikamp } 29098fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2910829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2911829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2912829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2913829fa70dSTheodore Ts'o "superblock", i); 291418db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 291518db4b4eSTheodore Ts'o return 0; 2916829fa70dSTheodore Ts'o } 291777260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 291877260807STheodore Ts'o inode_bitmap <= last_bg_block) { 291977260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 292077260807STheodore Ts'o "Inode bitmap for group %u overlaps " 292177260807STheodore Ts'o "block group descriptors", i); 292277260807STheodore Ts'o if (!sb_rdonly(sb)) 292377260807STheodore Ts'o return 0; 292477260807STheodore Ts'o } 29252b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2926b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2927a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2928b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2929ac27a0ecSDave Kleikamp return 0; 2930ac27a0ecSDave Kleikamp } 29318fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2932829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2933829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2934829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2935829fa70dSTheodore Ts'o "superblock", i); 293618db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 293718db4b4eSTheodore Ts'o return 0; 2938829fa70dSTheodore Ts'o } 293977260807STheodore Ts'o if (inode_table >= sb_block + 1 && 294077260807STheodore Ts'o inode_table <= last_bg_block) { 294177260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 294277260807STheodore Ts'o "Inode table for group %u overlaps " 294377260807STheodore Ts'o "block group descriptors", i); 294477260807STheodore Ts'o if (!sb_rdonly(sb)) 294577260807STheodore Ts'o return 0; 294677260807STheodore Ts'o } 2947bd81d8eeSLaurent Vivier if (inode_table < first_block || 29482b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2949b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2950a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2951b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2952ac27a0ecSDave Kleikamp return 0; 2953ac27a0ecSDave Kleikamp } 2954955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2955feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2956b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2957b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2958e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2959fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2960bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2961955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2962717d50e4SAndreas Dilger return 0; 2963717d50e4SAndreas Dilger } 29647ee1ec4cSLi Zefan } 2965955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2966ce421581SJose R. Santos if (!flexbg_flag) 2967617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2968ac27a0ecSDave Kleikamp } 2969bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2970bfff6873SLukas Czerner *first_not_zeroed = grp; 2971ac27a0ecSDave Kleikamp return 1; 2972ac27a0ecSDave Kleikamp } 2973ac27a0ecSDave Kleikamp 2974617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2975ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2976ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2977ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2978ac27a0ecSDave Kleikamp * 2979ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2980ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2981ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2982ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2983ac27a0ecSDave Kleikamp * 2984ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2985ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2986ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2987617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2988ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2989ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2990ac27a0ecSDave Kleikamp */ 2991617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2992617ba13bSMingming Cao struct ext4_super_block *es) 2993ac27a0ecSDave Kleikamp { 2994ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 29952c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2996ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 299795f1fda4Szhangyi (F) int quota_update = 0; 2998ac27a0ecSDave Kleikamp int i; 2999ac27a0ecSDave Kleikamp #endif 3000ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 3001ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 3002ac27a0ecSDave Kleikamp return; 3003ac27a0ecSDave Kleikamp } 3004ac27a0ecSDave Kleikamp 3005a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 3006b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3007b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 3008a8f48a95SEric Sandeen return; 3009a8f48a95SEric Sandeen } 3010a8f48a95SEric Sandeen 3011d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 3012d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 3013d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 3014d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 3015d39195c3SAmir Goldstein return; 3016d39195c3SAmir Goldstein } 3017d39195c3SAmir Goldstein 3018617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 3019c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 30201751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 302184474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 3022ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 3023ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 3024c25f9bc6SEric Sandeen } 3025ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 3026ac27a0ecSDave Kleikamp return; 3027ac27a0ecSDave Kleikamp } 3028ac27a0ecSDave Kleikamp 30291751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 3030b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 30311751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 3032ac27a0ecSDave Kleikamp } 3033ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 303495f1fda4Szhangyi (F) /* 303595f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 303695f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 303795f1fda4Szhangyi (F) */ 30381751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 303995f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 304095f1fda4Szhangyi (F) 304195f1fda4Szhangyi (F) if (!ret) 304295f1fda4Szhangyi (F) quota_update = 1; 304395f1fda4Szhangyi (F) else 304495f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 304595f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 304695f1fda4Szhangyi (F) } 304795f1fda4Szhangyi (F) 304895f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 3049a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 3050617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 3051617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 305295f1fda4Szhangyi (F) 305395f1fda4Szhangyi (F) if (!ret) 305495f1fda4Szhangyi (F) quota_update = 1; 305595f1fda4Szhangyi (F) else 3056b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3057b31e1552SEric Sandeen "Cannot turn on journaled " 305895f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 3059ac27a0ecSDave Kleikamp } 3060ac27a0ecSDave Kleikamp } 3061ac27a0ecSDave Kleikamp #endif 3062ac27a0ecSDave Kleikamp 3063ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 3064ac27a0ecSDave Kleikamp struct inode *inode; 3065ac27a0ecSDave Kleikamp 3066c65d5c6cSVegard Nossum /* 3067c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 3068c65d5c6cSVegard Nossum * so, skip the rest. 3069c65d5c6cSVegard Nossum */ 3070c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 3071c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 3072c65d5c6cSVegard Nossum es->s_last_orphan = 0; 3073c65d5c6cSVegard Nossum break; 3074c65d5c6cSVegard Nossum } 3075c65d5c6cSVegard Nossum 307697bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 307797bd42b9SJosef Bacik if (IS_ERR(inode)) { 3078ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 3079ac27a0ecSDave Kleikamp break; 3080ac27a0ecSDave Kleikamp } 3081ac27a0ecSDave Kleikamp 3082617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 3083871a2931SChristoph Hellwig dquot_initialize(inode); 3084ac27a0ecSDave Kleikamp if (inode->i_nlink) { 3085566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 3086b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 3087b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 308846e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 3089e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 3090ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 30915955102cSAl Viro inode_lock(inode); 309255f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 30932c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 3094b9a037b7SZhang Yi if (ret) { 3095b9a037b7SZhang Yi /* 3096b9a037b7SZhang Yi * We need to clean up the in-core orphan list 3097b9a037b7SZhang Yi * manually if ext4_truncate() failed to get a 3098b9a037b7SZhang Yi * transaction handle. 3099b9a037b7SZhang Yi */ 3100b9a037b7SZhang Yi ext4_orphan_del(NULL, inode); 31012c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 3102b9a037b7SZhang Yi } 31035955102cSAl Viro inode_unlock(inode); 3104ac27a0ecSDave Kleikamp nr_truncates++; 3105ac27a0ecSDave Kleikamp } else { 3106566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 3107b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 3108b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 310946e665e9SHarvey Harrison __func__, inode->i_ino); 3110ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 3111ac27a0ecSDave Kleikamp inode->i_ino); 3112ac27a0ecSDave Kleikamp nr_orphans++; 3113ac27a0ecSDave Kleikamp } 3114ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 3115ac27a0ecSDave Kleikamp } 3116ac27a0ecSDave Kleikamp 3117ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 3118ac27a0ecSDave Kleikamp 3119ac27a0ecSDave Kleikamp if (nr_orphans) 3120b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 3121b31e1552SEric Sandeen PLURAL(nr_orphans)); 3122ac27a0ecSDave Kleikamp if (nr_truncates) 3123b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 3124b31e1552SEric Sandeen PLURAL(nr_truncates)); 3125ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 312695f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 312795f1fda4Szhangyi (F) if (quota_update) { 3128a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 312995f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 3130287a8095SChristoph Hellwig dquot_quota_off(sb, i); 3131ac27a0ecSDave Kleikamp } 313295f1fda4Szhangyi (F) } 3133ac27a0ecSDave Kleikamp #endif 31341751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 3135ac27a0ecSDave Kleikamp } 31360b8e58a1SAndreas Dilger 3137cd2291a4SEric Sandeen /* 3138cd2291a4SEric Sandeen * Maximal extent format file size. 3139cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3140cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3141cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3142cd2291a4SEric Sandeen * so that won't be a limiting factor. 3143cd2291a4SEric Sandeen * 3144f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3145f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3146f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3147f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3148f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3149f17722f9SLukas Czerner * 3150cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3151cd2291a4SEric Sandeen */ 3152f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3153cd2291a4SEric Sandeen { 3154cd2291a4SEric Sandeen loff_t res; 3155cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3156cd2291a4SEric Sandeen 315772deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 315872deb455SChristoph Hellwig 315972deb455SChristoph Hellwig if (!has_huge_files) { 3160cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3161cd2291a4SEric Sandeen 3162cd2291a4SEric Sandeen /* total blocks in file system block size */ 3163cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3164cd2291a4SEric Sandeen upper_limit <<= blkbits; 3165cd2291a4SEric Sandeen } 3166cd2291a4SEric Sandeen 3167f17722f9SLukas Czerner /* 3168f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3169f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3170f17722f9SLukas Czerner * size 3171f17722f9SLukas Czerner */ 3172f17722f9SLukas Czerner res = (1LL << 32) - 1; 3173cd2291a4SEric Sandeen res <<= blkbits; 3174cd2291a4SEric Sandeen 3175cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3176cd2291a4SEric Sandeen if (res > upper_limit) 3177cd2291a4SEric Sandeen res = upper_limit; 3178cd2291a4SEric Sandeen 3179cd2291a4SEric Sandeen return res; 3180cd2291a4SEric Sandeen } 3181ac27a0ecSDave Kleikamp 3182ac27a0ecSDave Kleikamp /* 3183cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 31840fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 31850fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3186ac27a0ecSDave Kleikamp */ 3187f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3188ac27a0ecSDave Kleikamp { 3189617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 31900fc1b451SAneesh Kumar K.V int meta_blocks; 31910fc1b451SAneesh Kumar K.V loff_t upper_limit; 31920b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 31930b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 31940b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 31950b8e58a1SAndreas Dilger * 31960b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 31970b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 31980fc1b451SAneesh Kumar K.V */ 31990fc1b451SAneesh Kumar K.V 320072deb455SChristoph Hellwig if (!has_huge_files) { 32010fc1b451SAneesh Kumar K.V /* 320272deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 320372deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 320472deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 32050fc1b451SAneesh Kumar K.V */ 32060fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 32070fc1b451SAneesh Kumar K.V 32080fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 32090fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 32100fc1b451SAneesh Kumar K.V 32110fc1b451SAneesh Kumar K.V } else { 32128180a562SAneesh Kumar K.V /* 32138180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 32148180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 32158180a562SAneesh Kumar K.V * represent total number of blocks in 32168180a562SAneesh Kumar K.V * file system block size 32178180a562SAneesh Kumar K.V */ 32180fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 32190fc1b451SAneesh Kumar K.V 32200fc1b451SAneesh Kumar K.V } 32210fc1b451SAneesh Kumar K.V 32220fc1b451SAneesh Kumar K.V /* indirect blocks */ 32230fc1b451SAneesh Kumar K.V meta_blocks = 1; 32240fc1b451SAneesh Kumar K.V /* double indirect blocks */ 32250fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 32260fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 32270fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 32280fc1b451SAneesh Kumar K.V 32290fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 32300fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3231ac27a0ecSDave Kleikamp 3232ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3233ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3234ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3235ac27a0ecSDave Kleikamp res <<= bits; 3236ac27a0ecSDave Kleikamp if (res > upper_limit) 3237ac27a0ecSDave Kleikamp res = upper_limit; 32380fc1b451SAneesh Kumar K.V 32390fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 32400fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 32410fc1b451SAneesh Kumar K.V 3242ac27a0ecSDave Kleikamp return res; 3243ac27a0ecSDave Kleikamp } 3244ac27a0ecSDave Kleikamp 3245617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 324670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3247ac27a0ecSDave Kleikamp { 3248617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3249fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3250ac27a0ecSDave Kleikamp int has_super = 0; 3251ac27a0ecSDave Kleikamp 3252ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3253ac27a0ecSDave Kleikamp 3254e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 325570bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3256ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3257617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3258ac27a0ecSDave Kleikamp has_super = 1; 32590b8e58a1SAndreas Dilger 3260bd63f6b0SDarrick J. Wong /* 3261bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3262bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3263bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3264bd63f6b0SDarrick J. Wong * compensate. 3265bd63f6b0SDarrick J. Wong */ 3266bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 326749598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3268bd63f6b0SDarrick J. Wong has_super++; 3269bd63f6b0SDarrick J. Wong 3270617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3271ac27a0ecSDave Kleikamp } 3272ac27a0ecSDave Kleikamp 3273c9de560dSAlex Tomas /** 3274c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3275c9de560dSAlex Tomas * @sbi: In memory super block info 3276c9de560dSAlex Tomas * 3277c9de560dSAlex Tomas * If we have specified it via mount option, then 3278c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3279c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3280c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3281c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3282c9de560dSAlex Tomas * 3283c9de560dSAlex Tomas */ 3284c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3285c9de560dSAlex Tomas { 3286c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3287c9de560dSAlex Tomas unsigned long stripe_width = 3288c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 32893eb08658SDan Ehrenberg int ret; 3290c9de560dSAlex Tomas 3291c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 32923eb08658SDan Ehrenberg ret = sbi->s_stripe; 32935469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 32943eb08658SDan Ehrenberg ret = stripe_width; 32955469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 32963eb08658SDan Ehrenberg ret = stride; 32973eb08658SDan Ehrenberg else 32983eb08658SDan Ehrenberg ret = 0; 3299c9de560dSAlex Tomas 33003eb08658SDan Ehrenberg /* 33013eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 33023eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 33033eb08658SDan Ehrenberg */ 33043eb08658SDan Ehrenberg if (ret <= 1) 33053eb08658SDan Ehrenberg ret = 0; 3306c9de560dSAlex Tomas 33073eb08658SDan Ehrenberg return ret; 3308c9de560dSAlex Tomas } 3309ac27a0ecSDave Kleikamp 3310a13fb1a4SEric Sandeen /* 3311a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3312a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3313a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3314a13fb1a4SEric Sandeen * 0 if it cannot be. 3315a13fb1a4SEric Sandeen */ 3316a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 3317a13fb1a4SEric Sandeen { 3318e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3319a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3320a13fb1a4SEric Sandeen "Couldn't mount because of " 3321a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3322a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3323a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3324a13fb1a4SEric Sandeen return 0; 3325a13fb1a4SEric Sandeen } 3326a13fb1a4SEric Sandeen 3327c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3328c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3329c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3330c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3331c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3332c83ad55eSGabriel Krisman Bertazi return 0; 3333c83ad55eSGabriel Krisman Bertazi } 3334c83ad55eSGabriel Krisman Bertazi #endif 3335c83ad55eSGabriel Krisman Bertazi 3336a13fb1a4SEric Sandeen if (readonly) 3337a13fb1a4SEric Sandeen return 1; 3338a13fb1a4SEric Sandeen 3339e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 33402cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 33411751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 33422cb5cc8bSDarrick J. Wong return 1; 33432cb5cc8bSDarrick J. Wong } 33442cb5cc8bSDarrick J. Wong 3345a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3346e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3347a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3348a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3349a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3350a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3351a13fb1a4SEric Sandeen return 0; 3352a13fb1a4SEric Sandeen } 3353e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3354bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3355bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3356bab08ab9STheodore Ts'o "extents feature\n"); 3357bab08ab9STheodore Ts'o return 0; 3358bab08ab9STheodore Ts'o } 33597c319d32SAditya Kali 33609db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3361d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3362d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 33637c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3364d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3365689c958cSLi Xi return 0; 3366689c958cSLi Xi } 33677c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3368a13fb1a4SEric Sandeen return 1; 3369a13fb1a4SEric Sandeen } 3370a13fb1a4SEric Sandeen 337166e61a9eSTheodore Ts'o /* 337266e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 337366e61a9eSTheodore Ts'o * on the file system 337466e61a9eSTheodore Ts'o */ 3375235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 337666e61a9eSTheodore Ts'o { 3377235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3378235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3379235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 338066e61a9eSTheodore Ts'o 338166e61a9eSTheodore Ts'o if (es->s_error_count) 3382ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3383ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 338466e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 338566e61a9eSTheodore Ts'o if (es->s_first_error_time) { 33866a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 33876a0678a7SArnd Bergmann sb->s_id, 33886a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 338966e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 339066e61a9eSTheodore Ts'o es->s_first_error_func, 339166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 339266e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3393651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 339466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 339566e61a9eSTheodore Ts'o if (es->s_first_error_block) 3396651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 339766e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3398651e1c3bSJoe Perches printk(KERN_CONT "\n"); 339966e61a9eSTheodore Ts'o } 340066e61a9eSTheodore Ts'o if (es->s_last_error_time) { 34016a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 34026a0678a7SArnd Bergmann sb->s_id, 34036a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 340466e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 340566e61a9eSTheodore Ts'o es->s_last_error_func, 340666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 340766e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3408651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 340966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 341066e61a9eSTheodore Ts'o if (es->s_last_error_block) 3411651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 341266e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3413651e1c3bSJoe Perches printk(KERN_CONT "\n"); 341466e61a9eSTheodore Ts'o } 341566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 341666e61a9eSTheodore Ts'o } 341766e61a9eSTheodore Ts'o 3418bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3419bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3420bfff6873SLukas Czerner { 3421bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 34223d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 34233d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 34243d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 3425bfff6873SLukas Czerner unsigned long timeout = 0; 34263d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3427bfff6873SLukas Czerner int ret = 0; 3428bfff6873SLukas Czerner 34293d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 34303d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 34313d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 34323d392b26STheodore Ts'o if (prefetch_ios) 34333d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 34343d392b26STheodore Ts'o prefetch_ios); 34353d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 34363d392b26STheodore Ts'o prefetch_ios); 34373d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 34383d392b26STheodore Ts'o ret = 1; 34393d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 34403d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 34413d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 34423d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 34433d392b26STheodore Ts'o ret = 0; 34443d392b26STheodore Ts'o } 34453d392b26STheodore Ts'o } 34463d392b26STheodore Ts'o return ret; 34473d392b26STheodore Ts'o } 3448bfff6873SLukas Czerner 34493d392b26STheodore Ts'o for (; group < ngroups; group++) { 3450bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3451bfff6873SLukas Czerner if (!gdp) { 3452bfff6873SLukas Czerner ret = 1; 3453bfff6873SLukas Czerner break; 3454bfff6873SLukas Czerner } 3455bfff6873SLukas Czerner 3456bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3457bfff6873SLukas Czerner break; 3458bfff6873SLukas Czerner } 3459bfff6873SLukas Czerner 34607f511862STheodore Ts'o if (group >= ngroups) 3461bfff6873SLukas Czerner ret = 1; 3462bfff6873SLukas Czerner 3463bfff6873SLukas Czerner if (!ret) { 3464bfff6873SLukas Czerner timeout = jiffies; 3465bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3466bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 34673d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3468bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 346951ce6511SLukas Czerner timeout = (jiffies - timeout) * 34703d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_wait_mult; 3471bfff6873SLukas Czerner elr->lr_timeout = timeout; 3472bfff6873SLukas Czerner } 3473bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3474bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3475bfff6873SLukas Czerner } 3476bfff6873SLukas Czerner return ret; 3477bfff6873SLukas Czerner } 3478bfff6873SLukas Czerner 3479bfff6873SLukas Czerner /* 3480bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 34814ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3482bfff6873SLukas Czerner */ 3483bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3484bfff6873SLukas Czerner { 3485bfff6873SLukas Czerner if (!elr) 3486bfff6873SLukas Czerner return; 3487bfff6873SLukas Czerner 3488bfff6873SLukas Czerner list_del(&elr->lr_request); 34893d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3490bfff6873SLukas Czerner kfree(elr); 3491bfff6873SLukas Czerner } 3492bfff6873SLukas Czerner 3493bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3494bfff6873SLukas Czerner { 34951bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 34961bb933fbSLukas Czerner if (!ext4_li_info) { 34971bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3498bfff6873SLukas Czerner return; 34991bb933fbSLukas Czerner } 3500bfff6873SLukas Czerner 3501bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 35021bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3503bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 35041bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3505bfff6873SLukas Czerner } 3506bfff6873SLukas Czerner 35078f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 35088f1f7453SEric Sandeen 3509bfff6873SLukas Czerner /* 3510bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3511bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3512bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3513bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3514bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3515bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3516bfff6873SLukas Czerner * next waking time and put itself into sleep. 3517bfff6873SLukas Czerner */ 3518bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3519bfff6873SLukas Czerner { 3520bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3521bfff6873SLukas Czerner struct list_head *pos, *n; 3522bfff6873SLukas Czerner struct ext4_li_request *elr; 35234ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3524bfff6873SLukas Czerner 3525bfff6873SLukas Czerner BUG_ON(NULL == eli); 3526bfff6873SLukas Czerner 3527bfff6873SLukas Czerner cont_thread: 3528bfff6873SLukas Czerner while (true) { 3529bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3530bfff6873SLukas Czerner 3531bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3532bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3533bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3534bfff6873SLukas Czerner goto exit_thread; 3535bfff6873SLukas Czerner } 3536bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3537e22834f0SDmitry Monakhov int err = 0; 3538e22834f0SDmitry Monakhov int progress = 0; 3539bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3540bfff6873SLukas Czerner lr_request); 3541bfff6873SLukas Czerner 3542e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3543e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3544e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3545e22834f0SDmitry Monakhov continue; 3546e22834f0SDmitry Monakhov } 3547e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3548e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3549e22834f0SDmitry Monakhov progress = 1; 3550e22834f0SDmitry Monakhov /* 3551e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3552e22834f0SDmitry Monakhov * be removed from the list, it is 3553e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3554e22834f0SDmitry Monakhov */ 3555e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3556e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3557e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3558e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3559e22834f0SDmitry Monakhov n = pos->next; 3560e22834f0SDmitry Monakhov } 3561e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3562e22834f0SDmitry Monakhov } 3563b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3564e22834f0SDmitry Monakhov if (err) { 3565bfff6873SLukas Czerner ext4_remove_li_request(elr); 3566bfff6873SLukas Czerner continue; 3567bfff6873SLukas Czerner } 3568e22834f0SDmitry Monakhov if (!progress) { 3569e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3570e22834f0SDmitry Monakhov (prandom_u32() 3571e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3572b2c78cd0STheodore Ts'o } 3573bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3574bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3575bfff6873SLukas Czerner } 3576bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3577bfff6873SLukas Czerner 3578a0acae0eSTejun Heo try_to_freeze(); 3579bfff6873SLukas Czerner 35804ed5c033SLukas Czerner cur = jiffies; 35814ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3582f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3583bfff6873SLukas Czerner cond_resched(); 3584bfff6873SLukas Czerner continue; 3585bfff6873SLukas Czerner } 3586bfff6873SLukas Czerner 35874ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 35884ed5c033SLukas Czerner 35898f1f7453SEric Sandeen if (kthread_should_stop()) { 35908f1f7453SEric Sandeen ext4_clear_request_list(); 35918f1f7453SEric Sandeen goto exit_thread; 35928f1f7453SEric Sandeen } 3593bfff6873SLukas Czerner } 3594bfff6873SLukas Czerner 3595bfff6873SLukas Czerner exit_thread: 3596bfff6873SLukas Czerner /* 3597bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3598bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3599bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3600bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3601bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3602bfff6873SLukas Czerner * new one. 3603bfff6873SLukas Czerner */ 3604bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3605bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3606bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3607bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3608bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3609bfff6873SLukas Czerner goto cont_thread; 3610bfff6873SLukas Czerner } 3611bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3612bfff6873SLukas Czerner kfree(ext4_li_info); 3613bfff6873SLukas Czerner ext4_li_info = NULL; 3614bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3615bfff6873SLukas Czerner 3616bfff6873SLukas Czerner return 0; 3617bfff6873SLukas Czerner } 3618bfff6873SLukas Czerner 3619bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3620bfff6873SLukas Czerner { 3621bfff6873SLukas Czerner struct list_head *pos, *n; 3622bfff6873SLukas Czerner struct ext4_li_request *elr; 3623bfff6873SLukas Czerner 3624bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3625bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3626bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3627bfff6873SLukas Czerner lr_request); 3628bfff6873SLukas Czerner ext4_remove_li_request(elr); 3629bfff6873SLukas Czerner } 3630bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3631bfff6873SLukas Czerner } 3632bfff6873SLukas Czerner 3633bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3634bfff6873SLukas Czerner { 36358f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 36368f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 36378f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 36388f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3639bfff6873SLukas Czerner ext4_clear_request_list(); 3640bfff6873SLukas Czerner kfree(ext4_li_info); 3641bfff6873SLukas Czerner ext4_li_info = NULL; 364292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3643bfff6873SLukas Czerner "initialization thread\n", 3644bfff6873SLukas Czerner err); 3645bfff6873SLukas Czerner return err; 3646bfff6873SLukas Czerner } 3647bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3648bfff6873SLukas Czerner return 0; 3649bfff6873SLukas Czerner } 3650bfff6873SLukas Czerner 3651bfff6873SLukas Czerner /* 3652bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3653bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3654bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3655bfff6873SLukas Czerner * groups and return total number of groups. 3656bfff6873SLukas Czerner */ 3657bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3658bfff6873SLukas Czerner { 3659bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3660bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3661bfff6873SLukas Czerner 36628844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 36638844618dSTheodore Ts'o return ngroups; 36648844618dSTheodore Ts'o 3665bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3666bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3667bfff6873SLukas Czerner if (!gdp) 3668bfff6873SLukas Czerner continue; 3669bfff6873SLukas Czerner 367050122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3671bfff6873SLukas Czerner break; 3672bfff6873SLukas Czerner } 3673bfff6873SLukas Czerner 3674bfff6873SLukas Czerner return group; 3675bfff6873SLukas Czerner } 3676bfff6873SLukas Czerner 3677bfff6873SLukas Czerner static int ext4_li_info_new(void) 3678bfff6873SLukas Czerner { 3679bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3680bfff6873SLukas Czerner 3681bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3682bfff6873SLukas Czerner if (!eli) 3683bfff6873SLukas Czerner return -ENOMEM; 3684bfff6873SLukas Czerner 3685bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3686bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3687bfff6873SLukas Czerner 3688bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3689bfff6873SLukas Czerner 3690bfff6873SLukas Czerner ext4_li_info = eli; 3691bfff6873SLukas Czerner 3692bfff6873SLukas Czerner return 0; 3693bfff6873SLukas Czerner } 3694bfff6873SLukas Czerner 3695bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3696bfff6873SLukas Czerner ext4_group_t start) 3697bfff6873SLukas Czerner { 3698bfff6873SLukas Czerner struct ext4_li_request *elr; 3699bfff6873SLukas Czerner 3700bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3701bfff6873SLukas Czerner if (!elr) 3702bfff6873SLukas Czerner return NULL; 3703bfff6873SLukas Czerner 3704bfff6873SLukas Czerner elr->lr_super = sb; 37053d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 370621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 37073d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3708bfff6873SLukas Czerner elr->lr_next_group = start; 370921175ca4SHarshad Shirwadkar } else { 371021175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 37113d392b26STheodore Ts'o } 3712bfff6873SLukas Czerner 3713bfff6873SLukas Czerner /* 3714bfff6873SLukas Czerner * Randomize first schedule time of the request to 3715bfff6873SLukas Czerner * spread the inode table initialization requests 3716bfff6873SLukas Czerner * better. 3717bfff6873SLukas Czerner */ 3718dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3719dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3720bfff6873SLukas Czerner return elr; 3721bfff6873SLukas Czerner } 3722bfff6873SLukas Czerner 37237f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3724bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3725bfff6873SLukas Czerner { 3726bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 37277f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 372849598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 37296c5a6cb9SAndrew Morton int ret = 0; 3730bfff6873SLukas Czerner 37317f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 373251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 373351ce6511SLukas Czerner /* 373451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 373551ce6511SLukas Czerner * s_li_wait_mult might have changed. 373651ce6511SLukas Czerner */ 373751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 37387f511862STheodore Ts'o goto out; 373951ce6511SLukas Czerner } 3740bfff6873SLukas Czerner 374121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 37423d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 37433d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 37447f511862STheodore Ts'o goto out; 3745bfff6873SLukas Czerner 3746bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 37477f511862STheodore Ts'o if (!elr) { 37487f511862STheodore Ts'o ret = -ENOMEM; 37497f511862STheodore Ts'o goto out; 37507f511862STheodore Ts'o } 3751bfff6873SLukas Czerner 3752bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3753bfff6873SLukas Czerner ret = ext4_li_info_new(); 3754bfff6873SLukas Czerner if (ret) 3755bfff6873SLukas Czerner goto out; 3756bfff6873SLukas Czerner } 3757bfff6873SLukas Czerner 3758bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3759bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3760bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3761bfff6873SLukas Czerner 3762bfff6873SLukas Czerner sbi->s_li_request = elr; 376346e4690bSTao Ma /* 376446e4690bSTao Ma * set elr to NULL here since it has been inserted to 376546e4690bSTao Ma * the request_list and the removal and free of it is 376646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 376746e4690bSTao Ma */ 376846e4690bSTao Ma elr = NULL; 3769bfff6873SLukas Czerner 3770bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3771bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3772bfff6873SLukas Czerner if (ret) 3773bfff6873SLukas Czerner goto out; 3774bfff6873SLukas Czerner } 3775bfff6873SLukas Czerner out: 3776bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3777beed5ecbSNicolas Kaiser if (ret) 3778bfff6873SLukas Czerner kfree(elr); 3779bfff6873SLukas Czerner return ret; 3780bfff6873SLukas Czerner } 3781bfff6873SLukas Czerner 3782bfff6873SLukas Czerner /* 3783bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3784bfff6873SLukas Czerner * module unload. 3785bfff6873SLukas Czerner */ 3786bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3787bfff6873SLukas Czerner { 3788bfff6873SLukas Czerner /* 3789bfff6873SLukas Czerner * If thread exited earlier 3790bfff6873SLukas Czerner * there's nothing to be done. 3791bfff6873SLukas Czerner */ 37928f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3793bfff6873SLukas Czerner return; 3794bfff6873SLukas Czerner 37958f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3796bfff6873SLukas Czerner } 3797bfff6873SLukas Czerner 379825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 379925ed6e8aSDarrick J. Wong { 380025ed6e8aSDarrick J. Wong int ret = 1; 380125ed6e8aSDarrick J. Wong int compat, incompat; 380225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 380325ed6e8aSDarrick J. Wong 38049aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3805db9ee220SDarrick J. Wong /* journal checksum v3 */ 380625ed6e8aSDarrick J. Wong compat = 0; 3807db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 380825ed6e8aSDarrick J. Wong } else { 380925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 381025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 381125ed6e8aSDarrick J. Wong incompat = 0; 381225ed6e8aSDarrick J. Wong } 381325ed6e8aSDarrick J. Wong 3814feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3815feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3816feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3817feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 381825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 381925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 382025ed6e8aSDarrick J. Wong compat, 0, 382125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 382225ed6e8aSDarrick J. Wong incompat); 382325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 382425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 382525ed6e8aSDarrick J. Wong compat, 0, 382625ed6e8aSDarrick J. Wong incompat); 382725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 382825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 382925ed6e8aSDarrick J. Wong } else { 3830feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3831feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 383225ed6e8aSDarrick J. Wong } 383325ed6e8aSDarrick J. Wong 383425ed6e8aSDarrick J. Wong return ret; 383525ed6e8aSDarrick J. Wong } 383625ed6e8aSDarrick J. Wong 3837952fc18eSTheodore Ts'o /* 3838952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3839952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3840952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3841952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3842952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3843952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3844952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3845952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3846952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3847952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3848952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3849952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3850952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3851952fc18eSTheodore Ts'o */ 3852952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3853952fc18eSTheodore Ts'o char *buf) 3854952fc18eSTheodore Ts'o { 3855952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3856952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3857952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3858952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3859952fc18eSTheodore Ts'o int s, j, count = 0; 3860952fc18eSTheodore Ts'o 3861e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 38620548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 38630548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 38640548bbb8STheodore Ts'o 3865952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3866952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3867952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3868952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3869952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3870952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3871952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3872952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3873952fc18eSTheodore Ts'o count++; 3874952fc18eSTheodore Ts'o } 3875952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3876952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3877952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3878952fc18eSTheodore Ts'o count++; 3879952fc18eSTheodore Ts'o } 3880952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3881952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3882952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3883952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3884952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3885952fc18eSTheodore Ts'o count++; 3886952fc18eSTheodore Ts'o } 3887952fc18eSTheodore Ts'o if (i != grp) 3888952fc18eSTheodore Ts'o continue; 3889952fc18eSTheodore Ts'o s = 0; 3890952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3891952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3892952fc18eSTheodore Ts'o count++; 3893952fc18eSTheodore Ts'o } 3894c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3895c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3896c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3897c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3898c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3899952fc18eSTheodore Ts'o } 3900c48ae41bSTheodore Ts'o count += j; 3901c48ae41bSTheodore Ts'o for (; j > 0; j--) 3902c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3903952fc18eSTheodore Ts'o } 3904952fc18eSTheodore Ts'o if (!count) 3905952fc18eSTheodore Ts'o return 0; 3906952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3907952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3908952fc18eSTheodore Ts'o } 3909952fc18eSTheodore Ts'o 3910952fc18eSTheodore Ts'o /* 3911952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3912952fc18eSTheodore Ts'o */ 3913952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3914952fc18eSTheodore Ts'o { 3915952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3916952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 39173c816dedSEric Whitney struct inode *j_inode; 39183c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3919952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3920952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 39214fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3922952fc18eSTheodore Ts'o 3923952fc18eSTheodore Ts'o if (!buf) 3924952fc18eSTheodore Ts'o return -ENOMEM; 3925952fc18eSTheodore Ts'o 3926952fc18eSTheodore Ts'o /* 3927952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3928952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3929952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3930952fc18eSTheodore Ts'o */ 3931952fc18eSTheodore Ts'o 3932952fc18eSTheodore Ts'o /* 3933952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3934952fc18eSTheodore Ts'o */ 3935952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3936952fc18eSTheodore Ts'o 3937952fc18eSTheodore Ts'o /* 3938952fc18eSTheodore Ts'o * Add the overhead found in each block group 3939952fc18eSTheodore Ts'o */ 3940952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3941952fc18eSTheodore Ts'o int blks; 3942952fc18eSTheodore Ts'o 3943952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3944952fc18eSTheodore Ts'o overhead += blks; 3945952fc18eSTheodore Ts'o if (blks) 3946952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3947952fc18eSTheodore Ts'o cond_resched(); 3948952fc18eSTheodore Ts'o } 39493c816dedSEric Whitney 39503c816dedSEric Whitney /* 39513c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 39523c816dedSEric Whitney * loaded or not 39533c816dedSEric Whitney */ 3954ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 3955ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 3956f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 3957f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 39583c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 39593c816dedSEric Whitney if (j_inode) { 39603c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 39613c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 39623c816dedSEric Whitney iput(j_inode); 39633c816dedSEric Whitney } else { 39643c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 39653c816dedSEric Whitney } 39663c816dedSEric Whitney } 3967952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3968952fc18eSTheodore Ts'o smp_wmb(); 3969952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3970952fc18eSTheodore Ts'o return 0; 3971952fc18eSTheodore Ts'o } 3972952fc18eSTheodore Ts'o 3973b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 397427dd4385SLukas Czerner { 397527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3976b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 397727dd4385SLukas Czerner 397827dd4385SLukas Czerner /* 397930fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 398030fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 398130fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 398230fac0f7SJan Kara * to keep ext2/3 backward compatibility. 398330fac0f7SJan Kara */ 3984e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3985b5799018STheodore Ts'o return; 398630fac0f7SJan Kara /* 398727dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 398827dd4385SLukas Czerner * This should cover the situations where we can not afford to run 398927dd4385SLukas Czerner * out of space like for example punch hole, or converting 3990556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 399127dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 399227dd4385SLukas Czerner * very rare. 399327dd4385SLukas Czerner */ 3994b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3995b5799018STheodore Ts'o sbi->s_cluster_bits); 399627dd4385SLukas Czerner 399727dd4385SLukas Czerner do_div(resv_clusters, 50); 399827dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 399927dd4385SLukas Czerner 4000b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 400127dd4385SLukas Czerner } 400227dd4385SLukas Czerner 4003ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4004ca9b404fSRoman Anufriev { 4005ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4006ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4007ca9b404fSRoman Anufriev return "none"; 4008ca9b404fSRoman Anufriev 4009ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4010ca9b404fSRoman Anufriev return "journalled"; 4011ca9b404fSRoman Anufriev else 4012ca9b404fSRoman Anufriev return "writeback"; 4013ca9b404fSRoman Anufriev #else 4014ca9b404fSRoman Anufriev return "disabled"; 4015ca9b404fSRoman Anufriev #endif 4016ca9b404fSRoman Anufriev } 4017ca9b404fSRoman Anufriev 4018617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 4019ac27a0ecSDave Kleikamp { 40205e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 4021d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 40221d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4023617ba13bSMingming Cao struct ext4_super_block *es = NULL; 40245aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 40257c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4026617ba13bSMingming Cao ext4_fsblk_t block; 4027617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 402870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4029ac27a0ecSDave Kleikamp unsigned long offset = 0; 4030ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4031ac27a0ecSDave Kleikamp struct inode *root; 40320390131bSFrank Mayhar const char *descr; 4033dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4034281b5995STheodore Ts'o int blocksize, clustersize; 40354ec11028STheodore Ts'o unsigned int db_count; 40364ec11028STheodore Ts'o unsigned int i; 4037ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4038bd81d8eeSLaurent Vivier __u64 blocks_count; 403907aa2ea1SLukas Czerner int err = 0; 4040bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4041b237e304SHarshad Shirwadkar struct ext4_parsed_options parsed_opts; 4042b237e304SHarshad Shirwadkar 4043b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4044b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4045b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 4046196e402aSHarshad Shirwadkar parsed_opts.mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4047ac27a0ecSDave Kleikamp 40485aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 40495aee0f8aSTheodore Ts'o goto out_free_base; 4050705895b6SPekka Enberg 4051aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 4052705895b6SPekka Enberg sbi->s_blockgroup_lock = 4053705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 40545aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 40555aee0f8aSTheodore Ts'o goto out_free_base; 40565aee0f8aSTheodore Ts'o 4057ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 40582c0544b2STheodore Ts'o sbi->s_sb = sb; 4059240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4060d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 4061f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 40628446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4063ac27a0ecSDave Kleikamp 40649f6200bbSTheodore Ts'o /* Cleanup superblock name */ 4065ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 40669f6200bbSTheodore Ts'o 406707aa2ea1SLukas Czerner /* -EINVAL is default */ 4068dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4069617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4070ac27a0ecSDave Kleikamp if (!blocksize) { 4071b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4072ac27a0ecSDave Kleikamp goto out_fail; 4073ac27a0ecSDave Kleikamp } 4074ac27a0ecSDave Kleikamp 4075ac27a0ecSDave Kleikamp /* 4076617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4077ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4078ac27a0ecSDave Kleikamp */ 4079617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 408070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 408170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4082ac27a0ecSDave Kleikamp } else { 408370bbb3e0SAndrew Morton logical_sb_block = sb_block; 4084ac27a0ecSDave Kleikamp } 4085ac27a0ecSDave Kleikamp 40868394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 40878394a6abSzhangyi (F) if (IS_ERR(bh)) { 4088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 40898394a6abSzhangyi (F) ret = PTR_ERR(bh); 4090ac27a0ecSDave Kleikamp goto out_fail; 4091ac27a0ecSDave Kleikamp } 4092ac27a0ecSDave Kleikamp /* 4093ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4094617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4095ac27a0ecSDave Kleikamp */ 40962716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4097ac27a0ecSDave Kleikamp sbi->s_es = es; 4098ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4099617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4100617ba13bSMingming Cao goto cantfind_ext4; 4101afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4102ac27a0ecSDave Kleikamp 4103feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4104e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4105e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4106363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4107feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4108feb0ab32SDarrick J. Wong 4109d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4110d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4111d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4112d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4113d25425f8SDarrick J. Wong silent = 1; 4114d25425f8SDarrick J. Wong goto cantfind_ext4; 4115d25425f8SDarrick J. Wong } 4116d25425f8SDarrick J. Wong 41170441984aSDarrick J. Wong /* Load the checksum driver */ 41180441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 41190441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 41200441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 41210441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 41220441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 41230441984aSDarrick J. Wong goto failed_mount; 41240441984aSDarrick J. Wong } 41250441984aSDarrick J. Wong 4126a9c47317SDarrick J. Wong /* Check superblock checksum */ 4127a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4128a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4129a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4130a9c47317SDarrick J. Wong silent = 1; 41316a797d27SDarrick J. Wong ret = -EFSBADCRC; 4132a9c47317SDarrick J. Wong goto cantfind_ext4; 4133a9c47317SDarrick J. Wong } 4134a9c47317SDarrick J. Wong 4135a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4136e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 41378c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4138dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4139a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4140a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4141a9c47317SDarrick J. Wong 4142ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4143ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4144fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4145617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4146fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 414787f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4148fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4149617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4150fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4151ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4152fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 415303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4154fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 41552e7842b8SHugh Dickins #endif 4156995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4157995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 415898c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 415998c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 416098c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 416198c1a759SDarrick J. Wong 4162617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4163fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4164617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4165fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4166617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4167fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4168ac27a0ecSDave Kleikamp 4169617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4170fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4171bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4172fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4173bb4f397aSAneesh Kumar K.V else 4174fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 417545f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4176fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 41778b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4178fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4179ac27a0ecSDave Kleikamp 418008cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 418108cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 418230773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 418330773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 418430773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4185ac27a0ecSDave Kleikamp 41868b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4187fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4188ac27a0ecSDave Kleikamp 41891e2462f9SMingming Cao /* 4190dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4191dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4192dd919b98SAneesh Kumar K.V */ 4193bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 41948b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4195fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4196dd919b98SAneesh Kumar K.V 419751ce6511SLukas Czerner /* 419851ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 419951ce6511SLukas Czerner * no mount option specified. 420051ce6511SLukas Czerner */ 420151ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 420251ce6511SLukas Czerner 4203c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4204c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4205c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4206c9200760STheodore Ts'o "Invalid log block size: %u", 4207c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4208c9200760STheodore Ts'o goto failed_mount; 4209c9200760STheodore Ts'o } 4210c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4211c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4212c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4213c9200760STheodore Ts'o "Invalid log cluster size: %u", 4214c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4215c9200760STheodore Ts'o goto failed_mount; 4216c9200760STheodore Ts'o } 4217c9200760STheodore Ts'o 4218c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4219626b035bSRitesh Harjani 4220626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4221626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4222626b035bSRitesh Harjani 42239803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 42249803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 42259803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 42269803387cSTheodore Ts'o } else { 42279803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 42289803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 42299803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 42309803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 42319803387cSTheodore Ts'o sbi->s_first_ino); 42329803387cSTheodore Ts'o goto failed_mount; 42339803387cSTheodore Ts'o } 42349803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 42359803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 42369803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 42379803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42389803387cSTheodore Ts'o "unsupported inode size: %d", 42399803387cSTheodore Ts'o sbi->s_inode_size); 42404f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 42419803387cSTheodore Ts'o goto failed_mount; 42429803387cSTheodore Ts'o } 42439803387cSTheodore Ts'o /* 42449803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 42459803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 42469803387cSTheodore Ts'o * field should suffice to ensure we have extra space 42479803387cSTheodore Ts'o * for all three. 42489803387cSTheodore Ts'o */ 42499803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 42509803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 42519803387cSTheodore Ts'o sb->s_time_gran = 1; 42529803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 42539803387cSTheodore Ts'o } else { 42549803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 42559803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 42569803387cSTheodore Ts'o } 42579803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 42589803387cSTheodore Ts'o } 42599803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 42609803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 42619803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 42629803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 42639803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 42649803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 42659803387cSTheodore Ts'o 42669803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 42679803387cSTheodore Ts'o if (v > max) { 42689803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42699803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 42709803387cSTheodore Ts'o goto failed_mount; 42719803387cSTheodore Ts'o } 42729803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 42739803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 42749803387cSTheodore Ts'o 42759803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 42769803387cSTheodore Ts'o if (v > max) { 42779803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42789803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 42799803387cSTheodore Ts'o goto failed_mount; 42809803387cSTheodore Ts'o } 42819803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 42829803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 42839803387cSTheodore Ts'o } 42849803387cSTheodore Ts'o } 42859803387cSTheodore Ts'o 42865aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 42875aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 42885aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 42895aee0f8aSTheodore Ts'o GFP_KERNEL); 42905aee0f8aSTheodore Ts'o if (!s_mount_opts) 42915aee0f8aSTheodore Ts'o goto failed_mount; 4292b237e304SHarshad Shirwadkar if (!parse_options(s_mount_opts, sb, &parsed_opts, 0)) { 42938b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 42948b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 42955aee0f8aSTheodore Ts'o s_mount_opts); 42965aee0f8aSTheodore Ts'o } 42975aee0f8aSTheodore Ts'o kfree(s_mount_opts); 42988b67f04aSTheodore Ts'o } 42995a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 4300b237e304SHarshad Shirwadkar if (!parse_options((char *) data, sb, &parsed_opts, 0)) 4301ac27a0ecSDave Kleikamp goto failed_mount; 4302ac27a0ecSDave Kleikamp 4303c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4304f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4305c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4306c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4307c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4308c83ad55eSGabriel Krisman Bertazi 4309c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4310c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4311c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4312c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4313c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4314c83ad55eSGabriel Krisman Bertazi } 4315c83ad55eSGabriel Krisman Bertazi 4316c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4317c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4318c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4319c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4320c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4321c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4322c83ad55eSGabriel Krisman Bertazi encoding_flags); 4323c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4324c83ad55eSGabriel Krisman Bertazi } 4325c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4326c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4327c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4328c83ad55eSGabriel Krisman Bertazi 4329f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4330f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4331c83ad55eSGabriel Krisman Bertazi } 4332c83ad55eSGabriel Krisman Bertazi #endif 4333c83ad55eSGabriel Krisman Bertazi 433456889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4335556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4336781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4337244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4338556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 433956889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 434056889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 434156889787STheodore Ts'o "both data=journal and delalloc"); 434256889787STheodore Ts'o goto failed_mount; 434356889787STheodore Ts'o } 4344fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4345923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4346923ae0ffSRoss Zwisler "both data=journal and dax"); 4347923ae0ffSRoss Zwisler goto failed_mount; 4348923ae0ffSRoss Zwisler } 434973b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 435073b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 435173b92a2aSSergey Karamov "encrypted files will use data=ordered " 435273b92a2aSSergey Karamov "instead of data journaling mode"); 435373b92a2aSSergey Karamov } 435456889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 435556889787STheodore Ts'o clear_opt(sb, DELALLOC); 4356001e4a87STejun Heo } else { 4357001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 435856889787STheodore Ts'o } 435956889787STheodore Ts'o 43601751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 43611751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4362ac27a0ecSDave Kleikamp 4363617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4364e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4365e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4366e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4367b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4368b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4369b31e1552SEric Sandeen "running e2fsck is recommended"); 4370469108ffSTheodore Tso 4371ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4372ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4373e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4374ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4375ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4376ed3654ebSTheodore Ts'o goto failed_mount; 4377ed3654ebSTheodore Ts'o } 4378dec214d0STahsin Erdogan 4379dec214d0STahsin Erdogan /* 4380dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4381dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4382dec214d0STahsin Erdogan */ 4383dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4384dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4385dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4386dec214d0STahsin Erdogan goto failed_mount; 4387dec214d0STahsin Erdogan } 4388ed3654ebSTheodore Ts'o } 4389ed3654ebSTheodore Ts'o 43902035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 43912035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 43922035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 43932035e776STheodore Ts'o "using the ext4 subsystem"); 43942035e776STheodore Ts'o else { 43950d9366d6SEric Sandeen /* 43960d9366d6SEric Sandeen * If we're probing be silent, if this looks like 43970d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 43980d9366d6SEric Sandeen */ 43990d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 44000d9366d6SEric Sandeen goto failed_mount; 44012035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 44022035e776STheodore Ts'o "to feature incompatibilities"); 44032035e776STheodore Ts'o goto failed_mount; 44042035e776STheodore Ts'o } 44052035e776STheodore Ts'o } 44062035e776STheodore Ts'o 44072035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 44082035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 44092035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 44102035e776STheodore Ts'o "using the ext4 subsystem"); 44112035e776STheodore Ts'o else { 44120d9366d6SEric Sandeen /* 44130d9366d6SEric Sandeen * If we're probing be silent, if this looks like 44140d9366d6SEric Sandeen * it's actually an ext4 filesystem. 44150d9366d6SEric Sandeen */ 44160d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 44170d9366d6SEric Sandeen goto failed_mount; 44182035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 44192035e776STheodore Ts'o "to feature incompatibilities"); 44202035e776STheodore Ts'o goto failed_mount; 44212035e776STheodore Ts'o } 44222035e776STheodore Ts'o } 44232035e776STheodore Ts'o 4424469108ffSTheodore Tso /* 4425ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4426ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4427ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4428ac27a0ecSDave Kleikamp */ 4429bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4430ac27a0ecSDave Kleikamp goto failed_mount; 4431a13fb1a4SEric Sandeen 44325b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 44335b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 44345b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 44355b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 44365b9554dcSTheodore Ts'o goto failed_mount; 44375b9554dcSTheodore Ts'o } 44385b9554dcSTheodore Ts'o 4439a8ab6d38SIra Weiny if (bdev_dax_supported(sb->s_bdev, blocksize)) 4440a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4441a8ab6d38SIra Weiny 4442fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4443559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4444559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4445559db4c6SRoss Zwisler " that may contain inline data"); 4446361d24d4SEric Sandeen goto failed_mount; 4447559db4c6SRoss Zwisler } 4448a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 444924f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4450361d24d4SEric Sandeen "DAX unsupported by block device."); 4451361d24d4SEric Sandeen goto failed_mount; 445224f3478dSDan Williams } 4453923ae0ffSRoss Zwisler } 4454923ae0ffSRoss Zwisler 4455e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 44566ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 44576ddb2447STheodore Ts'o es->s_encryption_level); 44586ddb2447STheodore Ts'o goto failed_mount; 44596ddb2447STheodore Ts'o } 44606ddb2447STheodore Ts'o 4461ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4462afd09b61SAlexey Makhalov /* 4463afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4464afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4465afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4466afd09b61SAlexey Makhalov */ 4467afd09b61SAlexey Makhalov brelse(bh); 4468ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4469ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4470b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4471ce40733cSAneesh Kumar K.V blocksize); 4472afd09b61SAlexey Makhalov bh = NULL; 4473ac27a0ecSDave Kleikamp goto failed_mount; 4474ac27a0ecSDave Kleikamp } 4475ac27a0ecSDave Kleikamp 447670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 447770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 44788394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 44798394a6abSzhangyi (F) if (IS_ERR(bh)) { 4480b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4481b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 44828394a6abSzhangyi (F) ret = PTR_ERR(bh); 44838394a6abSzhangyi (F) bh = NULL; 4484ac27a0ecSDave Kleikamp goto failed_mount; 4485ac27a0ecSDave Kleikamp } 44862716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4487ac27a0ecSDave Kleikamp sbi->s_es = es; 4488617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4489b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4490b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4491ac27a0ecSDave Kleikamp goto failed_mount; 4492ac27a0ecSDave Kleikamp } 4493ac27a0ecSDave Kleikamp } 4494ac27a0ecSDave Kleikamp 4495e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4496f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4497f287a1a5STheodore Ts'o has_huge_files); 4498f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4499ac27a0ecSDave Kleikamp 45000d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4501e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 45028fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 45030d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4504d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4505b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4506b31e1552SEric Sandeen "unsupported descriptor size %lu", 45070d1ee42fSAlexandre Ratchov sbi->s_desc_size); 45080d1ee42fSAlexandre Ratchov goto failed_mount; 45090d1ee42fSAlexandre Ratchov } 45100d1ee42fSAlexandre Ratchov } else 45110d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 45120b8e58a1SAndreas Dilger 4513ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4514ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 45150b8e58a1SAndreas Dilger 4516617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4517ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4518617ba13bSMingming Cao goto cantfind_ext4; 4519cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4520cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4521cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4522b9c538daSJosh Triplett sbi->s_inodes_per_group); 4523cd6bb35bSTheodore Ts'o goto failed_mount; 4524cd6bb35bSTheodore Ts'o } 4525ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4526ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 45270d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4528ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4529ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4530e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4531e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 45320b8e58a1SAndreas Dilger 4533ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4534ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4535ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4536e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4537f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4538f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4539f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4540f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4541f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4542bc98a42cSDavid Howells if (!sb_rdonly(sb)) 454323301410STheodore Ts'o es->s_flags |= 454423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4545f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4546f99b2589STheodore Ts'o #else 4547bc98a42cSDavid Howells if (!sb_rdonly(sb)) 454823301410STheodore Ts'o es->s_flags |= 454923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4550f99b2589STheodore Ts'o #endif 4551f99b2589STheodore Ts'o } 455223301410STheodore Ts'o } 4553ac27a0ecSDave Kleikamp 4554281b5995STheodore Ts'o /* Handle clustersize */ 4555281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4556ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4557281b5995STheodore Ts'o if (clustersize < blocksize) { 4558281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4559281b5995STheodore Ts'o "cluster size (%d) smaller than " 4560281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4561281b5995STheodore Ts'o goto failed_mount; 4562281b5995STheodore Ts'o } 4563281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4564281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4565281b5995STheodore Ts'o sbi->s_clusters_per_group = 4566281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4567281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4568281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4569281b5995STheodore Ts'o "#clusters per group too big: %lu", 4570281b5995STheodore Ts'o sbi->s_clusters_per_group); 4571281b5995STheodore Ts'o goto failed_mount; 4572281b5995STheodore Ts'o } 4573281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4574281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4575281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4576281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4577281b5995STheodore Ts'o sbi->s_blocks_per_group, 4578281b5995STheodore Ts'o sbi->s_clusters_per_group); 4579281b5995STheodore Ts'o goto failed_mount; 4580281b5995STheodore Ts'o } 4581281b5995STheodore Ts'o } else { 4582281b5995STheodore Ts'o if (clustersize != blocksize) { 4583bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4584bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4585bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4586bfe0a5f4STheodore Ts'o goto failed_mount; 4587281b5995STheodore Ts'o } 4588ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4589b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4590b31e1552SEric Sandeen "#blocks per group too big: %lu", 4591ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4592ac27a0ecSDave Kleikamp goto failed_mount; 4593ac27a0ecSDave Kleikamp } 4594281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4595281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4596281b5995STheodore Ts'o } 4597281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4598281b5995STheodore Ts'o 4599960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4600960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4601960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4602960fd856STheodore Ts'o 4603bf43d84bSEric Sandeen /* 4604bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4605bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4606bf43d84bSEric Sandeen */ 46075a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 460830ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 46095a9ae68aSDarrick J. Wong if (err) { 4610b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4611bf43d84bSEric Sandeen " too large to mount safely on this system"); 4612ac27a0ecSDave Kleikamp goto failed_mount; 4613ac27a0ecSDave Kleikamp } 4614ac27a0ecSDave Kleikamp 4615617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4616617ba13bSMingming Cao goto cantfind_ext4; 4617e7c95593SEric Sandeen 46180f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 46190f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 46200f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4621b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4622b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 46230f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 46240f2ddca6SFrom: Thiemo Nagel goto failed_mount; 46250f2ddca6SFrom: Thiemo Nagel } 46260f2ddca6SFrom: Thiemo Nagel 46274ec11028STheodore Ts'o /* 46284ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 46294ec11028STheodore Ts'o * of the filesystem. 46304ec11028STheodore Ts'o */ 46314ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4632b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4633b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4634e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 46354ec11028STheodore Ts'o ext4_blocks_count(es)); 4636e7c95593SEric Sandeen goto failed_mount; 4637e7c95593SEric Sandeen } 4638bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4639bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4640bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4641bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4642bfe0a5f4STheodore Ts'o goto failed_mount; 4643bfe0a5f4STheodore Ts'o } 4644bfe0a5f4STheodore Ts'o 4645bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4646bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4647bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4648bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 46494ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4650df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 46514ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4652df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 46534ec11028STheodore Ts'o ext4_blocks_count(es), 46544ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 46554ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 46564ec11028STheodore Ts'o goto failed_mount; 46574ec11028STheodore Ts'o } 4658bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4659fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4660fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 46619e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 46629e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 46639e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 46649e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 46659e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 46669e463084STheodore Ts'o ret = -EINVAL; 46679e463084STheodore Ts'o goto failed_mount; 46689e463084STheodore Ts'o } 4669617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4670617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 46713a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 46722ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 46733a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 46743a4b77cdSEryu Guan "first meta block group too large: %u " 46753a4b77cdSEryu Guan "(group descriptor block count %u)", 46763a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 46773a4b77cdSEryu Guan goto failed_mount; 46783a4b77cdSEryu Guan } 46793a4b77cdSEryu Guan } 46801d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 46811d0c3924STheodore Ts'o kvmalloc_array(db_count, 4682f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 46831d0c3924STheodore Ts'o GFP_KERNEL)); 4684ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4685b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 46862cde417dSTheodore Ts'o ret = -ENOMEM; 4687ac27a0ecSDave Kleikamp goto failed_mount; 4688ac27a0ecSDave Kleikamp } 4689ac27a0ecSDave Kleikamp 4690705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4691ac27a0ecSDave Kleikamp 469285c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 469385c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 469485c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 46955df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 469685c8f176SAndrew Perepechko } 469785c8f176SAndrew Perepechko 4698ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 46991d0c3924STheodore Ts'o struct buffer_head *bh; 47001d0c3924STheodore Ts'o 470170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 47028394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 47038394a6abSzhangyi (F) if (IS_ERR(bh)) { 4704b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4705b31e1552SEric Sandeen "can't read group descriptor %d", i); 4706ac27a0ecSDave Kleikamp db_count = i; 47078394a6abSzhangyi (F) ret = PTR_ERR(bh); 4708ac27a0ecSDave Kleikamp goto failed_mount2; 4709ac27a0ecSDave Kleikamp } 47101d0c3924STheodore Ts'o rcu_read_lock(); 47111d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 47121d0c3924STheodore Ts'o rcu_read_unlock(); 4713ac27a0ecSDave Kleikamp } 471444de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4715829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4716b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 47176a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4718f9ae9cf5STheodore Ts'o goto failed_mount2; 4719ac27a0ecSDave Kleikamp } 4720772cb7c8SJose R. Santos 4721235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 4722c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 4723c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 472404496411STao Ma 4725a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4726eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4727ce7e010aSTheodore Ts'o goto failed_mount3; 4728ce7e010aSTheodore Ts'o 4729c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 473067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4731c9de560dSAlex Tomas 4732f9ae9cf5STheodore Ts'o /* 4733f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4734f9ae9cf5STheodore Ts'o */ 4735f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4736617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4737617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4738643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 4739a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4740ffcc4182SEric Biggers #endif 4741c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 4742c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 4743c93d8f88SEric Biggers #endif 4744ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4745617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4746e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 47471fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4748262b4662SJan Kara else 4749262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4750689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4751ac27a0ecSDave Kleikamp #endif 475285787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4753f2fa2ffcSAneesh Kumar K.V 4754ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 47553b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4756ac27a0ecSDave Kleikamp 4757aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 4758aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 4759aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_ineligible_updates, 0); 4760aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4761aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4762aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4763aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4764aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 47659b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 47669b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 4767aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 4768aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 47698016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 47708016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 47718016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 47728016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 47738016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 47748016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 47758016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4776aa75f4d3SHarshad Shirwadkar 4777ac27a0ecSDave Kleikamp sb->s_root = NULL; 4778ac27a0ecSDave Kleikamp 4779ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4780e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4781ac27a0ecSDave Kleikamp 4782bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4783c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 478450460fe8SDarrick J. Wong goto failed_mount3a; 4785c5e06d10SJohann Lombardi 4786ac27a0ecSDave Kleikamp /* 4787ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4788ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4789ac27a0ecSDave Kleikamp */ 4790e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 4791b237e304SHarshad Shirwadkar err = ext4_load_journal(sb, es, parsed_opts.journal_devnum); 47924753d8a2STheodore Ts'o if (err) 479350460fe8SDarrick J. Wong goto failed_mount3a; 4794bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4795e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4797b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4798744692dcSJiaying Zhang goto failed_mount_wq; 4799ac27a0ecSDave Kleikamp } else { 48001e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 48011e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 48021e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48031e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 48041e381f60SDmitry Monakhov goto failed_mount_wq; 48051e381f60SDmitry Monakhov } 48061e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 48071e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48081e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 48091e381f60SDmitry Monakhov goto failed_mount_wq; 48101e381f60SDmitry Monakhov } 48111e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 48121e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48131e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 48141e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 48151e381f60SDmitry Monakhov goto failed_mount_wq; 48161e381f60SDmitry Monakhov } 48171e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 48181e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 48191e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48201e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 48211e381f60SDmitry Monakhov goto failed_mount_wq; 48221e381f60SDmitry Monakhov } 482350b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 48241e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4825fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 4826995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 48270390131bSFrank Mayhar sbi->s_journal = NULL; 48280390131bSFrank Mayhar needs_recovery = 0; 48290390131bSFrank Mayhar goto no_journal; 4830ac27a0ecSDave Kleikamp } 4831ac27a0ecSDave Kleikamp 4832e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4833eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4834eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4835b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4836744692dcSJiaying Zhang goto failed_mount_wq; 4837eb40a09cSJose R. Santos } 4838eb40a09cSJose R. Santos 483925ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 484025ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 484125ed6e8aSDarrick J. Wong "feature set"); 484225ed6e8aSDarrick J. Wong goto failed_mount_wq; 4843d4da6c9cSLinus Torvalds } 4844818d276cSGirish Shilamkar 4845a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 4846a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4847a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 4848a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 4849a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 4850a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 4851a1e5e465SHarshad Shirwadkar } 4852a1e5e465SHarshad Shirwadkar 4853ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4854ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4855ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4856ac27a0ecSDave Kleikamp case 0: 4857ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 485863f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 485963f57933SAndrew Morton * cope, else JOURNAL_DATA 486063f57933SAndrew Morton */ 4861dab291afSMingming Cao if (jbd2_journal_check_available_features 486227f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4863fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 486427f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 486527f394a7STyson Nottingham } else { 4866fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 486727f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 486827f394a7STyson Nottingham } 4869ac27a0ecSDave Kleikamp break; 4870ac27a0ecSDave Kleikamp 4871617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4872617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4873dab291afSMingming Cao if (!jbd2_journal_check_available_features 4874dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4875b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4876b31e1552SEric Sandeen "requested data journaling mode"); 4877744692dcSJiaying Zhang goto failed_mount_wq; 4878ac27a0ecSDave Kleikamp } 48795a150bdeSGustavo A. R. Silva break; 4880ac27a0ecSDave Kleikamp default: 4881ac27a0ecSDave Kleikamp break; 4882ac27a0ecSDave Kleikamp } 4883ab04df78SJan Kara 4884ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4885ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4886ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4887ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4888ab04df78SJan Kara goto failed_mount_wq; 4889ab04df78SJan Kara } 4890ab04df78SJan Kara 4891b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 4892ac27a0ecSDave Kleikamp 4893342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 4894afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 4895342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 4896afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 489718aadd47SBobi Jam 4898ce7e010aSTheodore Ts'o no_journal: 4899cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 490047387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 490147387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4902cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4903cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 49049c191f70ST Makphaibulchoke goto failed_mount_wq; 49059c191f70ST Makphaibulchoke } 49069c191f70ST Makphaibulchoke 4907dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4908dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4909dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4910dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4911dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4912dec214d0STahsin Erdogan goto failed_mount_wq; 4913dec214d0STahsin Erdogan } 4914dec214d0STahsin Erdogan } 4915cdb7ee4cSTahsin Erdogan } 4916dec214d0STahsin Erdogan 4917c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 4918c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 4919c93d8f88SEric Biggers goto failed_mount_wq; 4920c93d8f88SEric Biggers } 4921c93d8f88SEric Biggers 4922bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4923e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4924e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 49254392fbc4SJan Kara ext4_commit_super(sb); 49266ddb2447STheodore Ts'o } 49276ddb2447STheodore Ts'o 4928fd89d5f2STejun Heo /* 4929952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4930952fc18eSTheodore Ts'o * superblock if present. 4931952fc18eSTheodore Ts'o */ 4932952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4933952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4934952fc18eSTheodore Ts'o else { 493507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 493607aa2ea1SLukas Czerner if (err) 4937952fc18eSTheodore Ts'o goto failed_mount_wq; 4938952fc18eSTheodore Ts'o } 4939952fc18eSTheodore Ts'o 4940952fc18eSTheodore Ts'o /* 4941fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4942fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4943fd89d5f2STejun Heo */ 49442e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 49452e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 49462e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 49472e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 494807aa2ea1SLukas Czerner ret = -ENOMEM; 49492e8fa54eSJan Kara goto failed_mount4; 49502e8fa54eSJan Kara } 49512e8fa54eSJan Kara 4952ac27a0ecSDave Kleikamp /* 4953dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4954ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4955ac27a0ecSDave Kleikamp */ 4956ac27a0ecSDave Kleikamp 49578a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 49581d1fe1eeSDavid Howells if (IS_ERR(root)) { 4959b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 49601d1fe1eeSDavid Howells ret = PTR_ERR(root); 496132a9bb57SManish Katiyar root = NULL; 4962ac27a0ecSDave Kleikamp goto failed_mount4; 4963ac27a0ecSDave Kleikamp } 4964ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4965b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 496694bf608aSAl Viro iput(root); 4967ac27a0ecSDave Kleikamp goto failed_mount4; 4968ac27a0ecSDave Kleikamp } 4969b886ee3eSGabriel Krisman Bertazi 497048fde701SAl Viro sb->s_root = d_make_root(root); 49711d1fe1eeSDavid Howells if (!sb->s_root) { 4972b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 49731d1fe1eeSDavid Howells ret = -ENOMEM; 49741d1fe1eeSDavid Howells goto failed_mount4; 49751d1fe1eeSDavid Howells } 4976ac27a0ecSDave Kleikamp 4977c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 4978c89128a0SJaegeuk Kim if (ret == -EROFS) { 49791751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4980c89128a0SJaegeuk Kim ret = 0; 4981c89128a0SJaegeuk Kim } else if (ret) 4982c89128a0SJaegeuk Kim goto failed_mount4a; 4983ef7f3835SKalpak Shah 4984b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 498527dd4385SLukas Czerner 49860f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 49876fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 49886fd058f7STheodore Ts'o if (err) { 4989b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4990fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4991f9ae9cf5STheodore Ts'o goto failed_mount4a; 4992f9ae9cf5STheodore Ts'o } 49930f5bde1dSJan Kara } 49948016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 4995f9ae9cf5STheodore Ts'o 4996f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4997196e402aSHarshad Shirwadkar 4998196e402aSHarshad Shirwadkar /* 4999196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5000196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5001196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5002196e402aSHarshad Shirwadkar */ 5003196e402aSHarshad Shirwadkar if (parsed_opts.mb_optimize_scan == 1) 5004196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5005196e402aSHarshad Shirwadkar else if (parsed_opts.mb_optimize_scan == 0) 5006196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5007196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5008196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5009196e402aSHarshad Shirwadkar 5010f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5011f9ae9cf5STheodore Ts'o if (err) { 5012f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5013f9ae9cf5STheodore Ts'o err); 5014dcf2d804STao Ma goto failed_mount5; 5015c2774d84SAneesh Kumar K.V } 5016c2774d84SAneesh Kumar K.V 5017027f14f5STheodore Ts'o /* 5018027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5019027f14f5STheodore Ts'o * mballoc is initialized 5020027f14f5STheodore Ts'o */ 5021027f14f5STheodore Ts'o if (sbi->s_journal) 5022027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5023027f14f5STheodore Ts'o ext4_journal_commit_callback; 5024027f14f5STheodore Ts'o 5025d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5026d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5027d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5028908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5029908c7f19STejun Heo GFP_KERNEL); 5030d5e03cbbSTheodore Ts'o if (!err) { 5031d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5032d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5033908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5034908c7f19STejun Heo GFP_KERNEL); 5035d5e03cbbSTheodore Ts'o } 5036d5e03cbbSTheodore Ts'o if (!err) 5037d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5038908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5039d5e03cbbSTheodore Ts'o if (!err) 5040908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5041908c7f19STejun Heo GFP_KERNEL); 5042c8585c6fSDaeho Jeong if (!err) 5043efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5044efc61345SEric Whitney GFP_KERNEL); 5045efc61345SEric Whitney if (!err) 5046bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5047c8585c6fSDaeho Jeong 5048d5e03cbbSTheodore Ts'o if (err) { 5049d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5050d5e03cbbSTheodore Ts'o goto failed_mount6; 5051d5e03cbbSTheodore Ts'o } 5052d5e03cbbSTheodore Ts'o 5053e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5054d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5055d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5056d5e03cbbSTheodore Ts'o "unable to initialize " 5057d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 50588f6840c4SYang Yingliang ret = -ENOMEM; 5059d5e03cbbSTheodore Ts'o goto failed_mount6; 5060d5e03cbbSTheodore Ts'o } 5061d5e03cbbSTheodore Ts'o 5062bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5063bfff6873SLukas Czerner if (err) 5064dcf2d804STao Ma goto failed_mount6; 5065bfff6873SLukas Czerner 5066b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5067dcf2d804STao Ma if (err) 5068dcf2d804STao Ma goto failed_mount7; 50693197ebdbSTheodore Ts'o 50709b2ff357SJan Kara #ifdef CONFIG_QUOTA 50719b2ff357SJan Kara /* Enable quota usage during mount. */ 5072bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 50739b2ff357SJan Kara err = ext4_enable_quotas(sb); 50749b2ff357SJan Kara if (err) 50759b2ff357SJan Kara goto failed_mount8; 50769b2ff357SJan Kara } 50779b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 50789b2ff357SJan Kara 5079bc71726cSzhangyi (F) /* 5080bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5081bc71726cSzhangyi (F) * used to detect the metadata async write error. 5082bc71726cSzhangyi (F) */ 5083bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5084bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5085bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5086bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5087617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5088617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5089617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 50900390131bSFrank Mayhar if (needs_recovery) { 5091b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 509211215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 509311215630SJan Kara if (err) 509411215630SJan Kara goto failed_mount8; 50950390131bSFrank Mayhar } 50960390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 50970390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 50980390131bSFrank Mayhar descr = " journalled data mode"; 50990390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 51000390131bSFrank Mayhar descr = " ordered data mode"; 51010390131bSFrank Mayhar else 51020390131bSFrank Mayhar descr = " writeback data mode"; 51030390131bSFrank Mayhar } else 51040390131bSFrank Mayhar descr = "out journal"; 51050390131bSFrank Mayhar 510679add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 510779add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 510879add3a3SLukas Czerner if (!blk_queue_discard(q)) 510979add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 511079add3a3SLukas Czerner "mounting with \"discard\" option, but " 511179add3a3SLukas Czerner "the device does not support discard"); 511279add3a3SLukas Czerner } 511379add3a3SLukas Czerner 5114e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 5115d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5116ca9b404fSRoman Anufriev "Opts: %.*s%s%s. Quota mode: %s.", descr, 51175aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 51185aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 5119ca9b404fSRoman Anufriev *sbi->s_es->s_mount_opts ? "; " : "", orig_data, 5120ca9b404fSRoman Anufriev ext4_quota_mode(sb)); 5121ac27a0ecSDave Kleikamp 512266e61a9eSTheodore Ts'o if (es->s_error_count) 512366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5124ac27a0ecSDave Kleikamp 5125efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5126efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5127efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5128efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 51291cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 51301cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5131efbed4dcSTheodore Ts'o 5132d4c402d9SCurt Wohlgemuth kfree(orig_data); 5133ac27a0ecSDave Kleikamp return 0; 5134ac27a0ecSDave Kleikamp 5135617ba13bSMingming Cao cantfind_ext4: 5136ac27a0ecSDave Kleikamp if (!silent) 5137b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5138ac27a0ecSDave Kleikamp goto failed_mount; 5139ac27a0ecSDave Kleikamp 514072ba7450STheodore Ts'o failed_mount8: 5141ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5142cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5143dcf2d804STao Ma failed_mount7: 5144dcf2d804STao Ma ext4_unregister_li_request(sb); 5145dcf2d804STao Ma failed_mount6: 5146f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 51477c990728SSuraj Jitindar Singh rcu_read_lock(); 51487c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 51497c990728SSuraj Jitindar Singh if (flex_groups) { 51507c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 51517c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 51527c990728SSuraj Jitindar Singh kvfree(flex_groups); 51537c990728SSuraj Jitindar Singh } 51547c990728SSuraj Jitindar Singh rcu_read_unlock(); 5155d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5156d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5157d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5158d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5159efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5160bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 516100764937SAzat Khuzhin failed_mount5: 5162f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5163f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5164f9ae9cf5STheodore Ts'o failed_mount4a: 516594bf608aSAl Viro dput(sb->s_root); 516632a9bb57SManish Katiyar sb->s_root = NULL; 516794bf608aSAl Viro failed_mount4: 5168b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 51692e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 51702e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 51714c0425ffSMingming Cao failed_mount_wq: 5172dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5173dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 517450c15df6SChengguang Xu 517547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 517647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 517750c15df6SChengguang Xu 51780390131bSFrank Mayhar if (sbi->s_journal) { 51794ba3fcddSZhang Yi jbd2_journal_unregister_shrinker(sbi->s_journal); 5180dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 518147b4a50bSJan Kara sbi->s_journal = NULL; 51820390131bSFrank Mayhar } 518350460fe8SDarrick J. Wong failed_mount3a: 5184d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5185eb68d0e2SZheng Liu failed_mount3: 5186c92dc856SJan Kara flush_work(&sbi->s_error_work); 51872a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5188618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5189ac27a0ecSDave Kleikamp failed_mount2: 51901d0c3924STheodore Ts'o rcu_read_lock(); 51911d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5192ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 51931d0c3924STheodore Ts'o brelse(group_desc[i]); 51941d0c3924STheodore Ts'o kvfree(group_desc); 51951d0c3924STheodore Ts'o rcu_read_unlock(); 5196ac27a0ecSDave Kleikamp failed_mount: 51970441984aSDarrick J. Wong if (sbi->s_chksum_driver) 51980441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5199c83ad55eSGabriel Krisman Bertazi 5200c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5201f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5202c83ad55eSGabriel Krisman Bertazi #endif 5203c83ad55eSGabriel Krisman Bertazi 5204ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5205a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 52060ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5207ac27a0ecSDave Kleikamp #endif 5208ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5209afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5210ac27a0ecSDave Kleikamp brelse(bh); 5211afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5212ac27a0ecSDave Kleikamp out_fail: 5213ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5214f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 52155aee0f8aSTheodore Ts'o out_free_base: 5216ac27a0ecSDave Kleikamp kfree(sbi); 5217d4c402d9SCurt Wohlgemuth kfree(orig_data); 52185e405595SDan Williams fs_put_dax(dax_dev); 521907aa2ea1SLukas Czerner return err ? err : ret; 5220ac27a0ecSDave Kleikamp } 5221ac27a0ecSDave Kleikamp 5222ac27a0ecSDave Kleikamp /* 5223ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5224ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5225ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5226ac27a0ecSDave Kleikamp */ 5227617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5228ac27a0ecSDave Kleikamp { 5229617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5230ac27a0ecSDave Kleikamp 5231ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 523230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 523330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 52346866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5235ac27a0ecSDave Kleikamp 5236a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5237ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5238dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5239ac27a0ecSDave Kleikamp else 5240dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 52415bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 52425bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 52435bf5683aSHidehiro Kawai else 52445bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5245a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5246ac27a0ecSDave Kleikamp } 5247ac27a0ecSDave Kleikamp 5248c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5249ac27a0ecSDave Kleikamp unsigned int journal_inum) 5250ac27a0ecSDave Kleikamp { 5251ac27a0ecSDave Kleikamp struct inode *journal_inode; 5252ac27a0ecSDave Kleikamp 5253c6cb7e77SEric Whitney /* 5254c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5255c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5256c6cb7e77SEric Whitney * will try to delete it. 5257c6cb7e77SEric Whitney */ 52588a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 52591d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5260b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5261ac27a0ecSDave Kleikamp return NULL; 5262ac27a0ecSDave Kleikamp } 5263ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5264ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5265ac27a0ecSDave Kleikamp iput(journal_inode); 5266b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5267ac27a0ecSDave Kleikamp return NULL; 5268ac27a0ecSDave Kleikamp } 5269ac27a0ecSDave Kleikamp 5270e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5271ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 52721d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5273b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5274ac27a0ecSDave Kleikamp iput(journal_inode); 5275ac27a0ecSDave Kleikamp return NULL; 5276ac27a0ecSDave Kleikamp } 5277c6cb7e77SEric Whitney return journal_inode; 5278c6cb7e77SEric Whitney } 5279c6cb7e77SEric Whitney 5280c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5281c6cb7e77SEric Whitney unsigned int journal_inum) 5282c6cb7e77SEric Whitney { 5283c6cb7e77SEric Whitney struct inode *journal_inode; 5284c6cb7e77SEric Whitney journal_t *journal; 5285c6cb7e77SEric Whitney 528611215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 528711215630SJan Kara return NULL; 5288c6cb7e77SEric Whitney 5289c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5290c6cb7e77SEric Whitney if (!journal_inode) 5291c6cb7e77SEric Whitney return NULL; 5292ac27a0ecSDave Kleikamp 5293dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5294ac27a0ecSDave Kleikamp if (!journal) { 5295b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5296ac27a0ecSDave Kleikamp iput(journal_inode); 5297ac27a0ecSDave Kleikamp return NULL; 5298ac27a0ecSDave Kleikamp } 5299ac27a0ecSDave Kleikamp journal->j_private = sb; 5300617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5301ac27a0ecSDave Kleikamp return journal; 5302ac27a0ecSDave Kleikamp } 5303ac27a0ecSDave Kleikamp 5304617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5305ac27a0ecSDave Kleikamp dev_t j_dev) 5306ac27a0ecSDave Kleikamp { 5307ac27a0ecSDave Kleikamp struct buffer_head *bh; 5308ac27a0ecSDave Kleikamp journal_t *journal; 5309617ba13bSMingming Cao ext4_fsblk_t start; 5310617ba13bSMingming Cao ext4_fsblk_t len; 5311ac27a0ecSDave Kleikamp int hblock, blocksize; 5312617ba13bSMingming Cao ext4_fsblk_t sb_block; 5313ac27a0ecSDave Kleikamp unsigned long offset; 5314617ba13bSMingming Cao struct ext4_super_block *es; 5315ac27a0ecSDave Kleikamp struct block_device *bdev; 5316ac27a0ecSDave Kleikamp 531711215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 531811215630SJan Kara return NULL; 53190390131bSFrank Mayhar 5320b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5321ac27a0ecSDave Kleikamp if (bdev == NULL) 5322ac27a0ecSDave Kleikamp return NULL; 5323ac27a0ecSDave Kleikamp 5324ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5325e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5326ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5327b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5328b31e1552SEric Sandeen "blocksize too small for journal device"); 5329ac27a0ecSDave Kleikamp goto out_bdev; 5330ac27a0ecSDave Kleikamp } 5331ac27a0ecSDave Kleikamp 5332617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5333617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5334ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5335ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5336b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5337b31e1552SEric Sandeen "external journal"); 5338ac27a0ecSDave Kleikamp goto out_bdev; 5339ac27a0ecSDave Kleikamp } 5340ac27a0ecSDave Kleikamp 53412716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5342617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5343ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5344617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5345b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5346b31e1552SEric Sandeen "bad superblock"); 5347ac27a0ecSDave Kleikamp brelse(bh); 5348ac27a0ecSDave Kleikamp goto out_bdev; 5349ac27a0ecSDave Kleikamp } 5350ac27a0ecSDave Kleikamp 5351df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5352df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5353df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5354df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5355df4763beSDarrick J. Wong "corrupt superblock"); 5356df4763beSDarrick J. Wong brelse(bh); 5357df4763beSDarrick J. Wong goto out_bdev; 5358df4763beSDarrick J. Wong } 5359df4763beSDarrick J. Wong 5360617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5361b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5362ac27a0ecSDave Kleikamp brelse(bh); 5363ac27a0ecSDave Kleikamp goto out_bdev; 5364ac27a0ecSDave Kleikamp } 5365ac27a0ecSDave Kleikamp 5366bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5367ac27a0ecSDave Kleikamp start = sb_block + 1; 5368ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5369ac27a0ecSDave Kleikamp 5370dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5371ac27a0ecSDave Kleikamp start, len, blocksize); 5372ac27a0ecSDave Kleikamp if (!journal) { 5373b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5374ac27a0ecSDave Kleikamp goto out_bdev; 5375ac27a0ecSDave Kleikamp } 5376ac27a0ecSDave Kleikamp journal->j_private = sb; 53772d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5378b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5379ac27a0ecSDave Kleikamp goto out_journal; 5380ac27a0ecSDave Kleikamp } 5381ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5382b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5383b31e1552SEric Sandeen "user (unsupported) - %d", 5384ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5385ac27a0ecSDave Kleikamp goto out_journal; 5386ac27a0ecSDave Kleikamp } 5387ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5388617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5389ac27a0ecSDave Kleikamp return journal; 53900b8e58a1SAndreas Dilger 5391ac27a0ecSDave Kleikamp out_journal: 5392dab291afSMingming Cao jbd2_journal_destroy(journal); 5393ac27a0ecSDave Kleikamp out_bdev: 5394617ba13bSMingming Cao ext4_blkdev_put(bdev); 5395ac27a0ecSDave Kleikamp return NULL; 5396ac27a0ecSDave Kleikamp } 5397ac27a0ecSDave Kleikamp 5398617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5399617ba13bSMingming Cao struct ext4_super_block *es, 5400ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5401ac27a0ecSDave Kleikamp { 5402ac27a0ecSDave Kleikamp journal_t *journal; 5403ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5404ac27a0ecSDave Kleikamp dev_t journal_dev; 5405ac27a0ecSDave Kleikamp int err = 0; 5406ac27a0ecSDave Kleikamp int really_read_only; 5407273108faSLukas Czerner int journal_dev_ro; 5408ac27a0ecSDave Kleikamp 540911215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 541011215630SJan Kara return -EFSCORRUPTED; 54110390131bSFrank Mayhar 5412ac27a0ecSDave Kleikamp if (journal_devnum && 5413ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5414b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5415b31e1552SEric Sandeen "numbers have changed"); 5416ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5417ac27a0ecSDave Kleikamp } else 5418ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5419ac27a0ecSDave Kleikamp 5420273108faSLukas Czerner if (journal_inum && journal_dev) { 5421273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5422273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5423273108faSLukas Czerner return -EINVAL; 5424273108faSLukas Czerner } 5425273108faSLukas Czerner 5426273108faSLukas Czerner if (journal_inum) { 5427273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5428273108faSLukas Czerner if (!journal) 5429273108faSLukas Czerner return -EINVAL; 5430273108faSLukas Czerner } else { 5431273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5432273108faSLukas Czerner if (!journal) 5433273108faSLukas Czerner return -EINVAL; 5434273108faSLukas Czerner } 5435273108faSLukas Czerner 5436273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5437273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5438273108faSLukas Czerner 5439273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5440273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5441273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5442273108faSLukas Czerner err = -EROFS; 5443273108faSLukas Czerner goto err_out; 5444273108faSLukas Czerner } 5445ac27a0ecSDave Kleikamp 5446ac27a0ecSDave Kleikamp /* 5447ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5448ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5449ac27a0ecSDave Kleikamp * can get read-write access to the device. 5450ac27a0ecSDave Kleikamp */ 5451e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5452bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5453b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5454b31e1552SEric Sandeen "required on readonly filesystem"); 5455ac27a0ecSDave Kleikamp if (really_read_only) { 5456b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5457d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5458d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5459273108faSLukas Czerner err = -EROFS; 5460273108faSLukas Czerner goto err_out; 5461ac27a0ecSDave Kleikamp } 5462b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5463b31e1552SEric Sandeen "be enabled during recovery"); 5464ac27a0ecSDave Kleikamp } 5465ac27a0ecSDave Kleikamp } 5466ac27a0ecSDave Kleikamp 546790576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5468b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 54694776004fSTheodore Ts'o 5470e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5471dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 54721c13d5c0STheodore Ts'o if (!err) { 54731c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 54741c13d5c0STheodore Ts'o if (save) 54751c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 54761c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5477dab291afSMingming Cao err = jbd2_journal_load(journal); 54781c13d5c0STheodore Ts'o if (save) 54791c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 54801c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 54811c13d5c0STheodore Ts'o kfree(save); 54821c13d5c0STheodore Ts'o } 5483ac27a0ecSDave Kleikamp 5484ac27a0ecSDave Kleikamp if (err) { 5485b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5486273108faSLukas Czerner goto err_out; 5487ac27a0ecSDave Kleikamp } 5488ac27a0ecSDave Kleikamp 5489617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 549011215630SJan Kara err = ext4_clear_journal_err(sb, es); 549111215630SJan Kara if (err) { 549211215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 549311215630SJan Kara jbd2_journal_destroy(journal); 549411215630SJan Kara return err; 549511215630SJan Kara } 5496ac27a0ecSDave Kleikamp 5497c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5498ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5499ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5500ac27a0ecSDave Kleikamp 5501ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 55024392fbc4SJan Kara ext4_commit_super(sb); 5503ac27a0ecSDave Kleikamp } 5504ac27a0ecSDave Kleikamp 55054ba3fcddSZhang Yi err = jbd2_journal_register_shrinker(journal); 55064ba3fcddSZhang Yi if (err) { 55074ba3fcddSZhang Yi EXT4_SB(sb)->s_journal = NULL; 55084ba3fcddSZhang Yi goto err_out; 55094ba3fcddSZhang Yi } 55104ba3fcddSZhang Yi 5511ac27a0ecSDave Kleikamp return 0; 5512273108faSLukas Czerner 5513273108faSLukas Czerner err_out: 5514273108faSLukas Czerner jbd2_journal_destroy(journal); 5515273108faSLukas Czerner return err; 5516ac27a0ecSDave Kleikamp } 5517ac27a0ecSDave Kleikamp 55182d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 55192d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5520ac27a0ecSDave Kleikamp { 5521c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5522e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5523e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5524ac27a0ecSDave Kleikamp 552505c2c00fSJan Kara lock_buffer(sbh); 5526a17712c8SJon Derrick /* 552771290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 552871290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 552971290b36STheodore Ts'o * write time when we are mounting the root file system 553071290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 553171290b36STheodore Ts'o * for people who are east of GMT and who make their clock 553271290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 553371290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 553471290b36STheodore Ts'o * to complain and force a full file system check. 553571290b36STheodore Ts'o */ 55361751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 55376a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5538afc32f7eSTheodore Ts'o es->s_kbytes_written = 5539e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 55408446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5541e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5542e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 554357042651STheodore Ts'o ext4_free_blocks_count_set(es, 5544e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5545e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5546e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 55477f93cff9STheodore Ts'o es->s_free_inodes_count = 55487f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5549e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5550c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5551c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5552c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5553c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5554c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5555c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5556c92dc856SJan Kara &es->s_first_error_time_hi, 5557c92dc856SJan Kara sbi->s_first_error_time); 5558c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5559c92dc856SJan Kara sizeof(es->s_first_error_func)); 5560c92dc856SJan Kara es->s_first_error_line = 5561c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5562c92dc856SJan Kara es->s_first_error_ino = 5563c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5564c92dc856SJan Kara es->s_first_error_block = 5565c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5566c92dc856SJan Kara es->s_first_error_errcode = 5567c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5568c92dc856SJan Kara } 5569c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5570c92dc856SJan Kara &es->s_last_error_time_hi, 5571c92dc856SJan Kara sbi->s_last_error_time); 5572c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5573c92dc856SJan Kara sizeof(es->s_last_error_func)); 5574c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5575c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5576c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5577c92dc856SJan Kara es->s_last_error_errcode = 5578c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5579c92dc856SJan Kara /* 5580c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5581c92dc856SJan Kara * started already 5582c92dc856SJan Kara */ 5583c92dc856SJan Kara if (!es->s_error_count) 5584c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5585c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5586c92dc856SJan Kara sbi->s_add_error_count = 0; 5587c92dc856SJan Kara } 5588c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5589c92dc856SJan Kara 559006db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 55912d01ddc8SJan Kara unlock_buffer(sbh); 55922d01ddc8SJan Kara } 55932d01ddc8SJan Kara 55942d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 55952d01ddc8SJan Kara { 55962d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 55972d01ddc8SJan Kara int error = 0; 55982d01ddc8SJan Kara 5599f88f1466SFengnan Chang if (!sbh) 5600f88f1466SFengnan Chang return -EINVAL; 5601f88f1466SFengnan Chang if (block_device_ejected(sb)) 5602f88f1466SFengnan Chang return -ENODEV; 56032d01ddc8SJan Kara 56042d01ddc8SJan Kara ext4_update_super(sb); 56052d01ddc8SJan Kara 5606e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 56074743f839SPranay Kr. Srivastava /* 56084743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 56094743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 56104743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 56114743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 56124743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 56134743f839SPranay Kr. Srivastava * write and hope for the best. 56144743f839SPranay Kr. Srivastava */ 56154743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 56164743f839SPranay Kr. Srivastava "superblock detected"); 56174743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 56184743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 56194743f839SPranay Kr. Srivastava } 56202d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 5621ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5622564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 562300473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5624c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5625b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5626b31e1552SEric Sandeen "superblock"); 5627914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5628914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5629914258bfSTheodore Ts'o } 5630c4be0c1dSTakashi Sato return error; 5631ac27a0ecSDave Kleikamp } 5632ac27a0ecSDave Kleikamp 5633ac27a0ecSDave Kleikamp /* 5634ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5635ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5636ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5637ac27a0ecSDave Kleikamp */ 563811215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5639617ba13bSMingming Cao struct ext4_super_block *es) 5640ac27a0ecSDave Kleikamp { 564111215630SJan Kara int err; 5642617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5643ac27a0ecSDave Kleikamp 5644e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 564511215630SJan Kara if (journal != NULL) { 564611215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 564711215630SJan Kara "mounted!"); 564811215630SJan Kara return -EFSCORRUPTED; 564911215630SJan Kara } 565011215630SJan Kara return 0; 56510390131bSFrank Mayhar } 5652dab291afSMingming Cao jbd2_journal_lock_updates(journal); 565301d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 565411215630SJan Kara if (err < 0) 56557ffe1ea8SHidehiro Kawai goto out; 56567ffe1ea8SHidehiro Kawai 5657bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 5658e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 56594392fbc4SJan Kara ext4_commit_super(sb); 5660ac27a0ecSDave Kleikamp } 56617ffe1ea8SHidehiro Kawai out: 5662dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 566311215630SJan Kara return err; 5664ac27a0ecSDave Kleikamp } 5665ac27a0ecSDave Kleikamp 5666ac27a0ecSDave Kleikamp /* 5667ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5668ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 5669ac27a0ecSDave Kleikamp * main filesystem now. 5670ac27a0ecSDave Kleikamp */ 567111215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 5672617ba13bSMingming Cao struct ext4_super_block *es) 5673ac27a0ecSDave Kleikamp { 5674ac27a0ecSDave Kleikamp journal_t *journal; 5675ac27a0ecSDave Kleikamp int j_errno; 5676ac27a0ecSDave Kleikamp const char *errstr; 5677ac27a0ecSDave Kleikamp 567811215630SJan Kara if (!ext4_has_feature_journal(sb)) { 567911215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 568011215630SJan Kara return -EFSCORRUPTED; 568111215630SJan Kara } 56820390131bSFrank Mayhar 5683617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5684ac27a0ecSDave Kleikamp 5685ac27a0ecSDave Kleikamp /* 5686ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 5687617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 5688ac27a0ecSDave Kleikamp */ 5689ac27a0ecSDave Kleikamp 5690dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 5691ac27a0ecSDave Kleikamp if (j_errno) { 5692ac27a0ecSDave Kleikamp char nbuf[16]; 5693ac27a0ecSDave Kleikamp 5694617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 569512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 5696ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 569712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 5698ac27a0ecSDave Kleikamp 5699617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5700617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 57014392fbc4SJan Kara ext4_commit_super(sb); 5702ac27a0ecSDave Kleikamp 5703dab291afSMingming Cao jbd2_journal_clear_err(journal); 5704d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 5705ac27a0ecSDave Kleikamp } 570611215630SJan Kara return 0; 5707ac27a0ecSDave Kleikamp } 5708ac27a0ecSDave Kleikamp 5709ac27a0ecSDave Kleikamp /* 5710ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 5711ac27a0ecSDave Kleikamp * and wait on the commit. 5712ac27a0ecSDave Kleikamp */ 5713617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 5714ac27a0ecSDave Kleikamp { 5715ac27a0ecSDave Kleikamp journal_t *journal; 5716ac27a0ecSDave Kleikamp 5717bc98a42cSDavid Howells if (sb_rdonly(sb)) 5718ac27a0ecSDave Kleikamp return 0; 5719ac27a0ecSDave Kleikamp 5720617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5721b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 5722ac27a0ecSDave Kleikamp } 5723ac27a0ecSDave Kleikamp 5724617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 5725ac27a0ecSDave Kleikamp { 572614ce0cb4STheodore Ts'o int ret = 0; 57279eddacf9SJan Kara tid_t target; 572806a407f1SDmitry Monakhov bool needs_barrier = false; 57298d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5730ac27a0ecSDave Kleikamp 573149598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 57320db1ff22STheodore Ts'o return 0; 57330db1ff22STheodore Ts'o 57349bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 57352e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 5736a1177825SJan Kara /* 5737a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 5738a1177825SJan Kara * no dirty dquots 5739a1177825SJan Kara */ 5740a1177825SJan Kara dquot_writeback_dquots(sb, -1); 574106a407f1SDmitry Monakhov /* 574206a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 574306a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 574406a407f1SDmitry Monakhov * transaction_commit will do it for us. 574506a407f1SDmitry Monakhov */ 5746bda32530STheodore Ts'o if (sbi->s_journal) { 574706a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 574806a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 574906a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 575006a407f1SDmitry Monakhov needs_barrier = true; 575106a407f1SDmitry Monakhov 57528d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 5753ac27a0ecSDave Kleikamp if (wait) 5754bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 5755bda32530STheodore Ts'o target); 57560390131bSFrank Mayhar } 5757bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5758bda32530STheodore Ts'o needs_barrier = true; 575906a407f1SDmitry Monakhov if (needs_barrier) { 576006a407f1SDmitry Monakhov int err; 5761c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 576206a407f1SDmitry Monakhov if (!ret) 576306a407f1SDmitry Monakhov ret = err; 576406a407f1SDmitry Monakhov } 576506a407f1SDmitry Monakhov 576606a407f1SDmitry Monakhov return ret; 576706a407f1SDmitry Monakhov } 576806a407f1SDmitry Monakhov 5769ac27a0ecSDave Kleikamp /* 5770ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5771ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5772be4f27d3SYongqiang Yang * 5773be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 57748e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 57758e8ad8a5SJan Kara * modifications. 5776ac27a0ecSDave Kleikamp */ 5777c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5778ac27a0ecSDave Kleikamp { 5779c4be0c1dSTakashi Sato int error = 0; 5780c4be0c1dSTakashi Sato journal_t *journal; 5781ac27a0ecSDave Kleikamp 5782bc98a42cSDavid Howells if (sb_rdonly(sb)) 57839ca92389STheodore Ts'o return 0; 57849ca92389STheodore Ts'o 5785c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5786ac27a0ecSDave Kleikamp 5787bb044576STheodore Ts'o if (journal) { 5788ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5789dab291afSMingming Cao jbd2_journal_lock_updates(journal); 57907ffe1ea8SHidehiro Kawai 57917ffe1ea8SHidehiro Kawai /* 5792bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5793bb044576STheodore Ts'o * flush the journal. 57947ffe1ea8SHidehiro Kawai */ 579501d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 57966b0310fbSEric Sandeen if (error < 0) 57976b0310fbSEric Sandeen goto out; 5798ac27a0ecSDave Kleikamp 5799ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5800e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5801c642dc9eSEric Sandeen } 5802c642dc9eSEric Sandeen 58034392fbc4SJan Kara error = ext4_commit_super(sb); 58046b0310fbSEric Sandeen out: 5805bb044576STheodore Ts'o if (journal) 58068e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5807bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 58086b0310fbSEric Sandeen return error; 5809ac27a0ecSDave Kleikamp } 5810ac27a0ecSDave Kleikamp 5811ac27a0ecSDave Kleikamp /* 5812ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5813ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5814ac27a0ecSDave Kleikamp */ 5815c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5816ac27a0ecSDave Kleikamp { 5817bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 58189ca92389STheodore Ts'o return 0; 58199ca92389STheodore Ts'o 5820c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 58219ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5822e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 5823c642dc9eSEric Sandeen } 5824c642dc9eSEric Sandeen 58254392fbc4SJan Kara ext4_commit_super(sb); 5826c4be0c1dSTakashi Sato return 0; 5827ac27a0ecSDave Kleikamp } 5828ac27a0ecSDave Kleikamp 5829673c6100STheodore Ts'o /* 5830673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5831673c6100STheodore Ts'o */ 5832673c6100STheodore Ts'o struct ext4_mount_options { 5833673c6100STheodore Ts'o unsigned long s_mount_opt; 5834a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 583508cefc7aSEric W. Biederman kuid_t s_resuid; 583608cefc7aSEric W. Biederman kgid_t s_resgid; 5837673c6100STheodore Ts'o unsigned long s_commit_interval; 5838673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5839673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5840673c6100STheodore Ts'o int s_jquota_fmt; 5841a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5842673c6100STheodore Ts'o #endif 5843673c6100STheodore Ts'o }; 5844673c6100STheodore Ts'o 5845617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5846ac27a0ecSDave Kleikamp { 5847617ba13bSMingming Cao struct ext4_super_block *es; 5848617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5849f25391ebSLukas Czerner unsigned long old_sb_flags, vfs_flags; 5850617ba13bSMingming Cao struct ext4_mount_options old_opts; 5851c79d967dSChristoph Hellwig int enable_quota = 0; 58528a266467STheodore Ts'o ext4_group_t g; 5853c5e06d10SJohann Lombardi int err = 0; 5854ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 585503dafb5fSChen Gang int i, j; 585633458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 5857ac27a0ecSDave Kleikamp #endif 5858d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5859b237e304SHarshad Shirwadkar struct ext4_parsed_options parsed_opts; 5860b237e304SHarshad Shirwadkar 5861b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5862b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 5863ac27a0ecSDave Kleikamp 586421ac738eSChengguang Xu if (data && !orig_data) 586521ac738eSChengguang Xu return -ENOMEM; 586621ac738eSChengguang Xu 5867ac27a0ecSDave Kleikamp /* Store the original options */ 5868ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5869ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5870a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5871ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5872ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5873ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 587430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 587530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5876ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5877ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5878a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 587903dafb5fSChen Gang if (sbi->s_qf_names[i]) { 588033458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 588133458eabSTheodore Ts'o 588233458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 588303dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 588403dafb5fSChen Gang for (j = 0; j < i; j++) 588503dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 58863e36a163SWei Yongjun kfree(orig_data); 588703dafb5fSChen Gang return -ENOMEM; 588803dafb5fSChen Gang } 588903dafb5fSChen Gang } else 589003dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5891ac27a0ecSDave Kleikamp #endif 5892b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5893b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = 5894b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 5895ac27a0ecSDave Kleikamp 5896f25391ebSLukas Czerner /* 5897f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 5898f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 5899f25391ebSLukas Czerner * s_flags. Copy those selected flags from *flags to s_flags 5900f25391ebSLukas Czerner */ 5901f25391ebSLukas Czerner vfs_flags = SB_LAZYTIME | SB_I_VERSION; 5902f25391ebSLukas Czerner sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags); 5903f25391ebSLukas Czerner 5904b237e304SHarshad Shirwadkar if (!parse_options(data, sb, &parsed_opts, 1)) { 5905ac27a0ecSDave Kleikamp err = -EINVAL; 5906ac27a0ecSDave Kleikamp goto restore_opts; 5907ac27a0ecSDave Kleikamp } 5908ac27a0ecSDave Kleikamp 59096b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 59106b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 59116b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 59122d5b86e0SEric Sandeen "during remount not supported; ignoring"); 59132d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5914c6d3d56dSDarrick J. Wong } 5915c6d3d56dSDarrick J. Wong 59166ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 59176ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 59186ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 59196ae6514bSPiotr Sarna "both data=journal and delalloc"); 59206ae6514bSPiotr Sarna err = -EINVAL; 59216ae6514bSPiotr Sarna goto restore_opts; 59226ae6514bSPiotr Sarna } 59236ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 59246ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 59256ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 59266ae6514bSPiotr Sarna err = -EINVAL; 59276ae6514bSPiotr Sarna goto restore_opts; 59286ae6514bSPiotr Sarna } 5929ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5930ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5931ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5932ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5933ab04df78SJan Kara err = -EINVAL; 5934ab04df78SJan Kara goto restore_opts; 5935ab04df78SJan Kara } 5936923ae0ffSRoss Zwisler } 5937923ae0ffSRoss Zwisler 5938cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5939cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5940cdb7ee4cSTahsin Erdogan err = -EINVAL; 5941cdb7ee4cSTahsin Erdogan goto restore_opts; 5942cdb7ee4cSTahsin Erdogan } 5943cdb7ee4cSTahsin Erdogan 59449b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 594554d3adbcSTheodore Ts'o ext4_abort(sb, EXT4_ERR_ESHUTDOWN, "Abort forced by user"); 5946ac27a0ecSDave Kleikamp 59471751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 59481751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5949ac27a0ecSDave Kleikamp 5950ac27a0ecSDave Kleikamp es = sbi->s_es; 5951ac27a0ecSDave Kleikamp 5952b3881f74STheodore Ts'o if (sbi->s_journal) { 5953617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5954b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 5955b3881f74STheodore Ts'o } 5956ac27a0ecSDave Kleikamp 5957c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 5958c92dc856SJan Kara flush_work(&sbi->s_error_work); 5959c92dc856SJan Kara 59601751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 59619b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 5962ac27a0ecSDave Kleikamp err = -EROFS; 5963ac27a0ecSDave Kleikamp goto restore_opts; 5964ac27a0ecSDave Kleikamp } 5965ac27a0ecSDave Kleikamp 59661751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 596738c03b34STheodore Ts'o err = sync_filesystem(sb); 596838c03b34STheodore Ts'o if (err < 0) 596938c03b34STheodore Ts'o goto restore_opts; 59700f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 59710f0dd62fSChristoph Hellwig if (err < 0) 5972c79d967dSChristoph Hellwig goto restore_opts; 5973c79d967dSChristoph Hellwig 5974ac27a0ecSDave Kleikamp /* 5975ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5976ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5977ac27a0ecSDave Kleikamp */ 59781751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5979ac27a0ecSDave Kleikamp 5980ac27a0ecSDave Kleikamp /* 5981ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5982ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5983ac27a0ecSDave Kleikamp * mark the partition as valid again. 5984ac27a0ecSDave Kleikamp */ 5985617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5986617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5987ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5988ac27a0ecSDave Kleikamp 598911215630SJan Kara if (sbi->s_journal) { 599011215630SJan Kara /* 599111215630SJan Kara * We let remount-ro finish even if marking fs 599211215630SJan Kara * as clean failed... 599311215630SJan Kara */ 5994617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 599511215630SJan Kara } 5996ac27a0ecSDave Kleikamp } else { 5997a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5998e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 59992cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6000ac27a0ecSDave Kleikamp err = -EROFS; 6001ac27a0ecSDave Kleikamp goto restore_opts; 6002ac27a0ecSDave Kleikamp } 6003ead6596bSEric Sandeen /* 60048a266467STheodore Ts'o * Make sure the group descriptor checksums 60050b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 60068a266467STheodore Ts'o */ 60078a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 60088a266467STheodore Ts'o struct ext4_group_desc *gdp = 60098a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 60108a266467STheodore Ts'o 6011feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6012b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6013b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6014e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 60158a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 60166a797d27SDarrick J. Wong err = -EFSBADCRC; 60178a266467STheodore Ts'o goto restore_opts; 60188a266467STheodore Ts'o } 60198a266467STheodore Ts'o } 60208a266467STheodore Ts'o 60218a266467STheodore Ts'o /* 6022ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6023ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6024ead6596bSEric Sandeen * require a full umount/remount for now. 6025ead6596bSEric Sandeen */ 6026ead6596bSEric Sandeen if (es->s_last_orphan) { 6027b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6028ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6029ead6596bSEric Sandeen "orphan inode list. Please " 6030b31e1552SEric Sandeen "umount/remount instead"); 6031ead6596bSEric Sandeen err = -EINVAL; 6032ead6596bSEric Sandeen goto restore_opts; 6033ead6596bSEric Sandeen } 6034ead6596bSEric Sandeen 6035ac27a0ecSDave Kleikamp /* 6036ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6037ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6038ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6039ac27a0ecSDave Kleikamp * the partition.) 6040ac27a0ecSDave Kleikamp */ 604111215630SJan Kara if (sbi->s_journal) { 604211215630SJan Kara err = ext4_clear_journal_err(sb, es); 604311215630SJan Kara if (err) 604411215630SJan Kara goto restore_opts; 604511215630SJan Kara } 6046ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6047c89128a0SJaegeuk Kim 6048c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6049c89128a0SJaegeuk Kim if (err) 6050c89128a0SJaegeuk Kim goto restore_opts; 6051c89128a0SJaegeuk Kim 60521751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6053e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6054c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6055c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6056c5e06d10SJohann Lombardi err = -EROFS; 6057c5e06d10SJohann Lombardi goto restore_opts; 6058c5e06d10SJohann Lombardi } 6059c79d967dSChristoph Hellwig enable_quota = 1; 6060ac27a0ecSDave Kleikamp } 6061ac27a0ecSDave Kleikamp } 6062bfff6873SLukas Czerner 6063bfff6873SLukas Czerner /* 6064bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6065bfff6873SLukas Czerner * current settings 6066bfff6873SLukas Czerner */ 6067bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6068bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6069bfff6873SLukas Czerner else { 6070bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6071bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6072bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6073bfff6873SLukas Czerner } 6074bfff6873SLukas Czerner 60750f5bde1dSJan Kara /* 60760f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 60770f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 60780f5bde1dSJan Kara * succeed. 60790f5bde1dSJan Kara */ 6080dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6081d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6082d176b1f6SJan Kara if (err) 6083d176b1f6SJan Kara goto restore_opts; 60840f5bde1dSJan Kara } 6085d176b1f6SJan Kara 6086c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 60874392fbc4SJan Kara err = ext4_commit_super(sb); 6088c89128a0SJaegeuk Kim if (err) 6089c89128a0SJaegeuk Kim goto restore_opts; 6090c89128a0SJaegeuk Kim } 60910390131bSFrank Mayhar 6092ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6093ac27a0ecSDave Kleikamp /* Release old quota file names */ 6094a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6095ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 60967c319d32SAditya Kali if (enable_quota) { 60977c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 60980f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6099e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 61007c319d32SAditya Kali err = ext4_enable_quotas(sb); 610107724f98STheodore Ts'o if (err) 61027c319d32SAditya Kali goto restore_opts; 61037c319d32SAditya Kali } 61047c319d32SAditya Kali } 61057c319d32SAditya Kali #endif 6106dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 61070f5bde1dSJan Kara ext4_release_system_zone(sb); 6108d4c402d9SCurt Wohlgemuth 6109*61bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 6110*61bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6111*61bb4a1cSTheodore Ts'o 6112f25391ebSLukas Czerner /* 6113f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6114f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6115f25391ebSLukas Czerner * s_flags. Copy those selected flags from s_flags to *flags 6116f25391ebSLukas Czerner */ 6117f25391ebSLukas Czerner *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags); 6118f25391ebSLukas Czerner 6119ca9b404fSRoman Anufriev ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.", 6120ca9b404fSRoman Anufriev orig_data, ext4_quota_mode(sb)); 6121d4c402d9SCurt Wohlgemuth kfree(orig_data); 6122ac27a0ecSDave Kleikamp return 0; 61230b8e58a1SAndreas Dilger 6124ac27a0ecSDave Kleikamp restore_opts: 6125ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6126ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6127a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6128ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6129ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6130ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 613130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 613230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6133dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 61340f5bde1dSJan Kara ext4_release_system_zone(sb); 6135ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6136ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6137a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 613833458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 613933458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6140ac27a0ecSDave Kleikamp } 614133458eabSTheodore Ts'o synchronize_rcu(); 614233458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 614333458eabSTheodore Ts'o kfree(to_free[i]); 6144ac27a0ecSDave Kleikamp #endif 6145*61bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 6146*61bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6147d4c402d9SCurt Wohlgemuth kfree(orig_data); 6148ac27a0ecSDave Kleikamp return err; 6149ac27a0ecSDave Kleikamp } 6150ac27a0ecSDave Kleikamp 6151689c958cSLi Xi #ifdef CONFIG_QUOTA 6152689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6153689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6154689c958cSLi Xi { 6155689c958cSLi Xi struct kqid qid; 6156689c958cSLi Xi struct dquot *dquot; 6157689c958cSLi Xi u64 limit; 6158689c958cSLi Xi u64 curblock; 6159689c958cSLi Xi 6160689c958cSLi Xi qid = make_kqid_projid(projid); 6161689c958cSLi Xi dquot = dqget(sb, qid); 6162689c958cSLi Xi if (IS_ERR(dquot)) 6163689c958cSLi Xi return PTR_ERR(dquot); 61647b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6165689c958cSLi Xi 6166a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6167a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 616857c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 616957c32ea4SChengguang Xu 6170689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6171f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6172f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6173689c958cSLi Xi buf->f_blocks = limit; 6174689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6175689c958cSLi Xi (buf->f_blocks > curblock) ? 6176689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6177689c958cSLi Xi } 6178689c958cSLi Xi 6179a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6180a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6181689c958cSLi Xi if (limit && buf->f_files > limit) { 6182689c958cSLi Xi buf->f_files = limit; 6183689c958cSLi Xi buf->f_ffree = 6184689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6185689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6186689c958cSLi Xi } 6187689c958cSLi Xi 61887b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6189689c958cSLi Xi dqput(dquot); 6190689c958cSLi Xi return 0; 6191689c958cSLi Xi } 6192689c958cSLi Xi #endif 6193689c958cSLi Xi 6194617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6195ac27a0ecSDave Kleikamp { 6196ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6197617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6198617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 619927dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6200d02a9391SKazuya Mio s64 bfree; 620127dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6202ac27a0ecSDave Kleikamp 6203952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6204952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6205ac27a0ecSDave Kleikamp 6206617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6207ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6208b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 620957042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 621057042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6211d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 621257042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 621327dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 621427dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 621527dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6216ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6217ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 621852d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6219617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 62209591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 62210b8e58a1SAndreas Dilger 6222689c958cSLi Xi #ifdef CONFIG_QUOTA 6223689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6224689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6225689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6226689c958cSLi Xi #endif 6227ac27a0ecSDave Kleikamp return 0; 6228ac27a0ecSDave Kleikamp } 6229ac27a0ecSDave Kleikamp 6230ac27a0ecSDave Kleikamp 6231ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6232ac27a0ecSDave Kleikamp 6233bc8230eeSJan Kara /* 6234bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6235bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6236bc8230eeSJan Kara */ 6237ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6238ac27a0ecSDave Kleikamp { 62394c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6240ac27a0ecSDave Kleikamp } 6241ac27a0ecSDave Kleikamp 6242617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6243ac27a0ecSDave Kleikamp { 6244ac27a0ecSDave Kleikamp int ret, err; 6245ac27a0ecSDave Kleikamp handle_t *handle; 6246ac27a0ecSDave Kleikamp struct inode *inode; 6247ac27a0ecSDave Kleikamp 6248ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 62499924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6250617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6251ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6252ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6253ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6254617ba13bSMingming Cao err = ext4_journal_stop(handle); 6255ac27a0ecSDave Kleikamp if (!ret) 6256ac27a0ecSDave Kleikamp ret = err; 6257ac27a0ecSDave Kleikamp return ret; 6258ac27a0ecSDave Kleikamp } 6259ac27a0ecSDave Kleikamp 6260617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6261ac27a0ecSDave Kleikamp { 6262ac27a0ecSDave Kleikamp int ret, err; 6263ac27a0ecSDave Kleikamp handle_t *handle; 6264ac27a0ecSDave Kleikamp 62659924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6266617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6267ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6268ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6269ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6270617ba13bSMingming Cao err = ext4_journal_stop(handle); 6271ac27a0ecSDave Kleikamp if (!ret) 6272ac27a0ecSDave Kleikamp ret = err; 6273ac27a0ecSDave Kleikamp return ret; 6274ac27a0ecSDave Kleikamp } 6275ac27a0ecSDave Kleikamp 6276617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6277ac27a0ecSDave Kleikamp { 6278ac27a0ecSDave Kleikamp int ret, err; 6279ac27a0ecSDave Kleikamp handle_t *handle; 6280ac27a0ecSDave Kleikamp 62819924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6282617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 62839c3013e9SJan Kara if (IS_ERR(handle)) { 62849c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 62859c3013e9SJan Kara dquot_release(dquot); 6286ac27a0ecSDave Kleikamp return PTR_ERR(handle); 62879c3013e9SJan Kara } 6288ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6289617ba13bSMingming Cao err = ext4_journal_stop(handle); 6290ac27a0ecSDave Kleikamp if (!ret) 6291ac27a0ecSDave Kleikamp ret = err; 6292ac27a0ecSDave Kleikamp return ret; 6293ac27a0ecSDave Kleikamp } 6294ac27a0ecSDave Kleikamp 6295617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6296ac27a0ecSDave Kleikamp { 6297262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6298262b4662SJan Kara 6299f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6300ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6301617ba13bSMingming Cao return ext4_write_dquot(dquot); 6302ac27a0ecSDave Kleikamp } else { 6303ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6304ac27a0ecSDave Kleikamp } 6305ac27a0ecSDave Kleikamp } 6306ac27a0ecSDave Kleikamp 6307617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6308ac27a0ecSDave Kleikamp { 6309ac27a0ecSDave Kleikamp int ret, err; 6310ac27a0ecSDave Kleikamp handle_t *handle; 6311ac27a0ecSDave Kleikamp 6312ac27a0ecSDave Kleikamp /* Data block + inode block */ 63132b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6314ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6315ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6316ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6317617ba13bSMingming Cao err = ext4_journal_stop(handle); 6318ac27a0ecSDave Kleikamp if (!ret) 6319ac27a0ecSDave Kleikamp ret = err; 6320ac27a0ecSDave Kleikamp return ret; 6321ac27a0ecSDave Kleikamp } 6322ac27a0ecSDave Kleikamp 6323ac27a0ecSDave Kleikamp /* 6324ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 6325ac27a0ecSDave Kleikamp * the quota file and such... 6326ac27a0ecSDave Kleikamp */ 6327617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 6328ac27a0ecSDave Kleikamp { 632933458eabSTheodore Ts'o return dquot_quota_on_mount(sb, get_qf_name(sb, EXT4_SB(sb), type), 6330617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 6331ac27a0ecSDave Kleikamp } 6332ac27a0ecSDave Kleikamp 6333daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6334daf647d2STheodore Ts'o { 6335daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6336daf647d2STheodore Ts'o 6337daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6338daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6339daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6340daf647d2STheodore Ts'o * because the name of the lock is set using the 6341daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6342daf647d2STheodore Ts'o */ 6343daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6344daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6345daf647d2STheodore Ts'o } 6346daf647d2STheodore Ts'o 6347ac27a0ecSDave Kleikamp /* 6348ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6349ac27a0ecSDave Kleikamp */ 6350617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 63518c54ca9cSAl Viro const struct path *path) 6352ac27a0ecSDave Kleikamp { 6353ac27a0ecSDave Kleikamp int err; 6354ac27a0ecSDave Kleikamp 6355ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6356ac27a0ecSDave Kleikamp return -EINVAL; 63570623543bSJan Kara 6358ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6359d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6360ac27a0ecSDave Kleikamp return -EXDEV; 6361e0770e91SJan Kara 6362e0770e91SJan Kara /* Quota already enabled for this file? */ 6363e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6364e0770e91SJan Kara return -EBUSY; 6365e0770e91SJan Kara 63660623543bSJan Kara /* Journaling quota? */ 63670623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 63682b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6369f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6370b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6371b31e1552SEric Sandeen "Quota file not on filesystem root. " 6372b31e1552SEric Sandeen "Journaled quota will not work"); 637391389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 637491389240SJan Kara } else { 637591389240SJan Kara /* 637691389240SJan Kara * Clear the flag just in case mount options changed since 637791389240SJan Kara * last time. 637891389240SJan Kara */ 637991389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 63800623543bSJan Kara } 63810623543bSJan Kara 63820623543bSJan Kara /* 63830623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 63840623543bSJan Kara * all updates to the file when we bypass pagecache... 63850623543bSJan Kara */ 63860390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 63872b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 63880623543bSJan Kara /* 63890623543bSJan Kara * We don't need to lock updates but journal_flush() could 63900623543bSJan Kara * otherwise be livelocked... 63910623543bSJan Kara */ 63920623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 639301d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 63940623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6395f00c9e44SJan Kara if (err) 63967ffe1ea8SHidehiro Kawai return err; 63977ffe1ea8SHidehiro Kawai } 6398957153fcSJan Kara 6399daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6400daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6401957153fcSJan Kara if (err) { 6402daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6403daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6404957153fcSJan Kara } else { 6405957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6406957153fcSJan Kara handle_t *handle; 6407957153fcSJan Kara 640861a92987SJan Kara /* 640961a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 641061a92987SJan Kara * files. If this fails, we return success anyway since quotas 641161a92987SJan Kara * are already enabled and this is not a hard failure. 641261a92987SJan Kara */ 6413957153fcSJan Kara inode_lock(inode); 6414957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6415957153fcSJan Kara if (IS_ERR(handle)) 6416957153fcSJan Kara goto unlock_inode; 6417957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6418957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6419957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 64204209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6421957153fcSJan Kara ext4_journal_stop(handle); 6422957153fcSJan Kara unlock_inode: 6423957153fcSJan Kara inode_unlock(inode); 6424957153fcSJan Kara } 6425daf647d2STheodore Ts'o return err; 6426ac27a0ecSDave Kleikamp } 6427ac27a0ecSDave Kleikamp 64287c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 64297c319d32SAditya Kali unsigned int flags) 64307c319d32SAditya Kali { 64317c319d32SAditya Kali int err; 64327c319d32SAditya Kali struct inode *qf_inode; 6433a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 64347c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6435689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6436689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 64377c319d32SAditya Kali }; 64387c319d32SAditya Kali 6439e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 64407c319d32SAditya Kali 64417c319d32SAditya Kali if (!qf_inums[type]) 64427c319d32SAditya Kali return -EPERM; 64437c319d32SAditya Kali 64448a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 64457c319d32SAditya Kali if (IS_ERR(qf_inode)) { 64467c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 64477c319d32SAditya Kali return PTR_ERR(qf_inode); 64487c319d32SAditya Kali } 64497c319d32SAditya Kali 6450bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6451bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6452daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 64537212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6454daf647d2STheodore Ts'o if (err) 6455daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 645661157b24SPan Bian iput(qf_inode); 64577c319d32SAditya Kali 64587c319d32SAditya Kali return err; 64597c319d32SAditya Kali } 64607c319d32SAditya Kali 64617c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 64627c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 64637c319d32SAditya Kali { 64647c319d32SAditya Kali int type, err = 0; 6465a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 64667c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6467689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6468689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 64697c319d32SAditya Kali }; 647049da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 647149da9392SJan Kara test_opt(sb, USRQUOTA), 647249da9392SJan Kara test_opt(sb, GRPQUOTA), 647349da9392SJan Kara test_opt(sb, PRJQUOTA), 647449da9392SJan Kara }; 64757c319d32SAditya Kali 647691389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6477a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 64787c319d32SAditya Kali if (qf_inums[type]) { 64797c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 648049da9392SJan Kara DQUOT_USAGE_ENABLED | 648149da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 64827c319d32SAditya Kali if (err) { 64837c319d32SAditya Kali ext4_warning(sb, 648472ba7450STheodore Ts'o "Failed to enable quota tracking " 648572ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 648672ba7450STheodore Ts'o "e2fsck to fix.", type, err); 64877f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 64887f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 64897f144fd0SJunichi Uekawa 64907c319d32SAditya Kali return err; 64917c319d32SAditya Kali } 64927c319d32SAditya Kali } 64937c319d32SAditya Kali } 64947c319d32SAditya Kali return 0; 64957c319d32SAditya Kali } 64967c319d32SAditya Kali 6497ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6498ca0e05e4SDmitry Monakhov { 649921f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 650021f97697SJan Kara handle_t *handle; 6501957153fcSJan Kara int err; 650221f97697SJan Kara 650387009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 650487009d86SDmitry Monakhov * Caller already holds s_umount sem */ 650587009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6506ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6507ca0e05e4SDmitry Monakhov 6508957153fcSJan Kara if (!inode || !igrab(inode)) 65090b268590SAmir Goldstein goto out; 65100b268590SAmir Goldstein 6511957153fcSJan Kara err = dquot_quota_off(sb, type); 6512964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6513957153fcSJan Kara goto out_put; 6514957153fcSJan Kara 6515957153fcSJan Kara inode_lock(inode); 651661a92987SJan Kara /* 651761a92987SJan Kara * Update modification times of quota files when userspace can 651861a92987SJan Kara * start looking at them. If we fail, we return success anyway since 651961a92987SJan Kara * this is not a hard failure and quotas are already disabled. 652061a92987SJan Kara */ 65219924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 65224209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 65234209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6524957153fcSJan Kara goto out_unlock; 65254209ae12SHarshad Shirwadkar } 6526957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6527957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6528eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 65294209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 653021f97697SJan Kara ext4_journal_stop(handle); 6531957153fcSJan Kara out_unlock: 6532957153fcSJan Kara inode_unlock(inode); 6533957153fcSJan Kara out_put: 6534964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6535957153fcSJan Kara iput(inode); 6536957153fcSJan Kara return err; 653721f97697SJan Kara out: 6538ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6539ca0e05e4SDmitry Monakhov } 6540ca0e05e4SDmitry Monakhov 6541ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6542ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6543ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6544ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6545617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6546ac27a0ecSDave Kleikamp size_t len, loff_t off) 6547ac27a0ecSDave Kleikamp { 6548ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6549725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6550ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6551ac27a0ecSDave Kleikamp int tocopy; 6552ac27a0ecSDave Kleikamp size_t toread; 6553ac27a0ecSDave Kleikamp struct buffer_head *bh; 6554ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6555ac27a0ecSDave Kleikamp 6556ac27a0ecSDave Kleikamp if (off > i_size) 6557ac27a0ecSDave Kleikamp return 0; 6558ac27a0ecSDave Kleikamp if (off+len > i_size) 6559ac27a0ecSDave Kleikamp len = i_size-off; 6560ac27a0ecSDave Kleikamp toread = len; 6561ac27a0ecSDave Kleikamp while (toread > 0) { 6562ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6563ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 65641c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 65651c215028STheodore Ts'o if (IS_ERR(bh)) 65661c215028STheodore Ts'o return PTR_ERR(bh); 6567ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6568ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6569ac27a0ecSDave Kleikamp else 6570ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6571ac27a0ecSDave Kleikamp brelse(bh); 6572ac27a0ecSDave Kleikamp offset = 0; 6573ac27a0ecSDave Kleikamp toread -= tocopy; 6574ac27a0ecSDave Kleikamp data += tocopy; 6575ac27a0ecSDave Kleikamp blk++; 6576ac27a0ecSDave Kleikamp } 6577ac27a0ecSDave Kleikamp return len; 6578ac27a0ecSDave Kleikamp } 6579ac27a0ecSDave Kleikamp 6580ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6581ac27a0ecSDave Kleikamp * enough credits) */ 6582617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6583ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6584ac27a0ecSDave Kleikamp { 6585ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6586725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 65874209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6588c5e298aeSTheodore Ts'o int retries = 0; 6589ac27a0ecSDave Kleikamp struct buffer_head *bh; 6590ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6591ac27a0ecSDave Kleikamp 65920390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 6593b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6594b31e1552SEric Sandeen " cancelled because transaction is not started", 65959c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 65969c3013e9SJan Kara return -EIO; 65979c3013e9SJan Kara } 659867eeb568SDmitry Monakhov /* 659967eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 660067eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 660167eeb568SDmitry Monakhov */ 660267eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 660367eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 660467eeb568SDmitry Monakhov " cancelled because not block aligned", 660567eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 660667eeb568SDmitry Monakhov return -EIO; 660767eeb568SDmitry Monakhov } 660867eeb568SDmitry Monakhov 6609c5e298aeSTheodore Ts'o do { 6610c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6611c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6612c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 661345586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6614c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 66151c215028STheodore Ts'o if (IS_ERR(bh)) 66161c215028STheodore Ts'o return PTR_ERR(bh); 6617ac27a0ecSDave Kleikamp if (!bh) 6618ac27a0ecSDave Kleikamp goto out; 66195d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6620617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 6621ac27a0ecSDave Kleikamp if (err) { 6622ac27a0ecSDave Kleikamp brelse(bh); 66231c215028STheodore Ts'o return err; 6624ac27a0ecSDave Kleikamp } 6625ac27a0ecSDave Kleikamp lock_buffer(bh); 662667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6627ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6628ac27a0ecSDave Kleikamp unlock_buffer(bh); 66290390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6630ac27a0ecSDave Kleikamp brelse(bh); 6631ac27a0ecSDave Kleikamp out: 663267eeb568SDmitry Monakhov if (inode->i_size < off + len) { 663367eeb568SDmitry Monakhov i_size_write(inode, off + len); 6634617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 66354209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 66364209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 66374209ae12SHarshad Shirwadkar err = err2; 663821f97697SJan Kara } 66394209ae12SHarshad Shirwadkar return err ? err : len; 6640ac27a0ecSDave Kleikamp } 6641ac27a0ecSDave Kleikamp #endif 6642ac27a0ecSDave Kleikamp 6643152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 6644152a0836SAl Viro const char *dev_name, void *data) 6645ac27a0ecSDave Kleikamp { 6646152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 6647ac27a0ecSDave Kleikamp } 6648ac27a0ecSDave Kleikamp 6649c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 665024b58424STheodore Ts'o static inline void register_as_ext2(void) 665124b58424STheodore Ts'o { 665224b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 665324b58424STheodore Ts'o if (err) 665424b58424STheodore Ts'o printk(KERN_WARNING 665524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 665624b58424STheodore Ts'o } 665724b58424STheodore Ts'o 665824b58424STheodore Ts'o static inline void unregister_as_ext2(void) 665924b58424STheodore Ts'o { 666024b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 666124b58424STheodore Ts'o } 66622035e776STheodore Ts'o 66632035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 66642035e776STheodore Ts'o { 6665e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 66662035e776STheodore Ts'o return 0; 6667bc98a42cSDavid Howells if (sb_rdonly(sb)) 66682035e776STheodore Ts'o return 1; 6669e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 66702035e776STheodore Ts'o return 0; 66712035e776STheodore Ts'o return 1; 66722035e776STheodore Ts'o } 667324b58424STheodore Ts'o #else 667424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 667524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 66762035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 667724b58424STheodore Ts'o #endif 667824b58424STheodore Ts'o 667924b58424STheodore Ts'o static inline void register_as_ext3(void) 668024b58424STheodore Ts'o { 668124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 668224b58424STheodore Ts'o if (err) 668324b58424STheodore Ts'o printk(KERN_WARNING 668424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 668524b58424STheodore Ts'o } 668624b58424STheodore Ts'o 668724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 668824b58424STheodore Ts'o { 668924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 669024b58424STheodore Ts'o } 66912035e776STheodore Ts'o 66922035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 66932035e776STheodore Ts'o { 6694e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 66952035e776STheodore Ts'o return 0; 6696e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 66972035e776STheodore Ts'o return 0; 6698bc98a42cSDavid Howells if (sb_rdonly(sb)) 66992035e776STheodore Ts'o return 1; 6700e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 67012035e776STheodore Ts'o return 0; 67022035e776STheodore Ts'o return 1; 67032035e776STheodore Ts'o } 670424b58424STheodore Ts'o 670503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 6706ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 670703010a33STheodore Ts'o .name = "ext4", 6708152a0836SAl Viro .mount = ext4_mount, 6709ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 671014f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 6711ac27a0ecSDave Kleikamp }; 67127f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 6713ac27a0ecSDave Kleikamp 6714e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 6715e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 6716e9e3bcecSEric Sandeen 67175dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 6718ac27a0ecSDave Kleikamp { 6719e9e3bcecSEric Sandeen int i, err; 6720c9de560dSAlex Tomas 6721e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 672207c0c5d8SAl Viro ext4_li_info = NULL; 672307c0c5d8SAl Viro 67249a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 672512e9b892SDmitry Monakhov ext4_check_flag_values(); 6726e9e3bcecSEric Sandeen 6727e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 6728e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 6729e9e3bcecSEric Sandeen 673051865fdaSZheng Liu err = ext4_init_es(); 67316fd058f7STheodore Ts'o if (err) 67326fd058f7STheodore Ts'o return err; 673351865fdaSZheng Liu 67341dc0aa46SEric Whitney err = ext4_init_pending(); 67351dc0aa46SEric Whitney if (err) 673622cfe4b4SEric Biggers goto out7; 673722cfe4b4SEric Biggers 673822cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 673922cfe4b4SEric Biggers if (err) 67401dc0aa46SEric Whitney goto out6; 67411dc0aa46SEric Whitney 674251865fdaSZheng Liu err = ext4_init_pageio(); 674351865fdaSZheng Liu if (err) 6744b5799018STheodore Ts'o goto out5; 674551865fdaSZheng Liu 67465dabfc78STheodore Ts'o err = ext4_init_system_zone(); 6747bd2d0210STheodore Ts'o if (err) 6748b5799018STheodore Ts'o goto out4; 6749857ac889SLukas Czerner 6750b5799018STheodore Ts'o err = ext4_init_sysfs(); 6751dd68314cSTheodore Ts'o if (err) 6752b5799018STheodore Ts'o goto out3; 6753857ac889SLukas Czerner 67545dabfc78STheodore Ts'o err = ext4_init_mballoc(); 6755ac27a0ecSDave Kleikamp if (err) 6756c9de560dSAlex Tomas goto out2; 6757ac27a0ecSDave Kleikamp err = init_inodecache(); 6758ac27a0ecSDave Kleikamp if (err) 6759ac27a0ecSDave Kleikamp goto out1; 6760aa75f4d3SHarshad Shirwadkar 6761aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 6762aa75f4d3SHarshad Shirwadkar if (err) 6763aa75f4d3SHarshad Shirwadkar goto out05; 6764aa75f4d3SHarshad Shirwadkar 676524b58424STheodore Ts'o register_as_ext3(); 67662035e776STheodore Ts'o register_as_ext2(); 676703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 6768ac27a0ecSDave Kleikamp if (err) 6769ac27a0ecSDave Kleikamp goto out; 6770bfff6873SLukas Czerner 6771ac27a0ecSDave Kleikamp return 0; 6772ac27a0ecSDave Kleikamp out: 677324b58424STheodore Ts'o unregister_as_ext2(); 677424b58424STheodore Ts'o unregister_as_ext3(); 6775aa75f4d3SHarshad Shirwadkar out05: 6776ac27a0ecSDave Kleikamp destroy_inodecache(); 6777ac27a0ecSDave Kleikamp out1: 67785dabfc78STheodore Ts'o ext4_exit_mballoc(); 67799c191f70ST Makphaibulchoke out2: 6780b5799018STheodore Ts'o ext4_exit_sysfs(); 6781b5799018STheodore Ts'o out3: 6782dd68314cSTheodore Ts'o ext4_exit_system_zone(); 6783b5799018STheodore Ts'o out4: 67845dabfc78STheodore Ts'o ext4_exit_pageio(); 6785b5799018STheodore Ts'o out5: 678622cfe4b4SEric Biggers ext4_exit_post_read_processing(); 67871dc0aa46SEric Whitney out6: 678822cfe4b4SEric Biggers ext4_exit_pending(); 678922cfe4b4SEric Biggers out7: 679051865fdaSZheng Liu ext4_exit_es(); 679151865fdaSZheng Liu 6792ac27a0ecSDave Kleikamp return err; 6793ac27a0ecSDave Kleikamp } 6794ac27a0ecSDave Kleikamp 67955dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 6796ac27a0ecSDave Kleikamp { 6797bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 679824b58424STheodore Ts'o unregister_as_ext2(); 679924b58424STheodore Ts'o unregister_as_ext3(); 680003010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 6801ac27a0ecSDave Kleikamp destroy_inodecache(); 68025dabfc78STheodore Ts'o ext4_exit_mballoc(); 6803b5799018STheodore Ts'o ext4_exit_sysfs(); 68045dabfc78STheodore Ts'o ext4_exit_system_zone(); 68055dabfc78STheodore Ts'o ext4_exit_pageio(); 680622cfe4b4SEric Biggers ext4_exit_post_read_processing(); 6807dd12ed14SEric Sandeen ext4_exit_es(); 68081dc0aa46SEric Whitney ext4_exit_pending(); 6809ac27a0ecSDave Kleikamp } 6810ac27a0ecSDave Kleikamp 6811ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 681283982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6813ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 68147ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 68155dabfc78STheodore Ts'o module_init(ext4_init_fs) 68165dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6817