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) { 7082d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7092d01ddc8SJan Kara if (IS_ERR(handle)) 7102d01ddc8SJan Kara goto write_directly; 7112d01ddc8SJan Kara if (jbd2_journal_get_write_access(handle, sbi->s_sbh)) { 7122d01ddc8SJan Kara jbd2_journal_stop(handle); 7132d01ddc8SJan Kara goto write_directly; 7142d01ddc8SJan Kara } 7152d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 7162d01ddc8SJan Kara if (jbd2_journal_dirty_metadata(handle, sbi->s_sbh)) { 7172d01ddc8SJan Kara jbd2_journal_stop(handle); 7182d01ddc8SJan Kara goto write_directly; 7192d01ddc8SJan Kara } 7202d01ddc8SJan Kara jbd2_journal_stop(handle); 7212d01ddc8SJan Kara return; 7222d01ddc8SJan Kara } 7232d01ddc8SJan Kara write_directly: 7242d01ddc8SJan Kara /* 7252d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7262d01ddc8SJan Kara * out and hope for the best. 7272d01ddc8SJan Kara */ 7284392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 729ac27a0ecSDave Kleikamp } 730ac27a0ecSDave Kleikamp 731efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 732efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 733efbed4dcSTheodore Ts'o "EXT4-fs error") 734efbed4dcSTheodore Ts'o 73512062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 736014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 73754d3adbcSTheodore Ts'o const char *fmt, ...) 738ac27a0ecSDave Kleikamp { 7390ff2ea7dSJoe Perches struct va_format vaf; 740ac27a0ecSDave Kleikamp va_list args; 741ac27a0ecSDave Kleikamp 7420db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7430db1ff22STheodore Ts'o return; 7440db1ff22STheodore Ts'o 745ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 746efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 747ac27a0ecSDave Kleikamp va_start(args, fmt); 7480ff2ea7dSJoe Perches vaf.fmt = fmt; 7490ff2ea7dSJoe Perches vaf.va = &args; 750efbed4dcSTheodore Ts'o printk(KERN_CRIT 751efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7520ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 753ac27a0ecSDave Kleikamp va_end(args); 754efbed4dcSTheodore Ts'o } 755e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 756ac27a0ecSDave Kleikamp } 757ac27a0ecSDave Kleikamp 758e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 75954d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 760273df556SFrank Mayhar const char *fmt, ...) 761273df556SFrank Mayhar { 762273df556SFrank Mayhar va_list args; 763f7c21177STheodore Ts'o struct va_format vaf; 764273df556SFrank Mayhar 7650db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7660db1ff22STheodore Ts'o return; 7670db1ff22STheodore Ts'o 768ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 769efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 770273df556SFrank Mayhar va_start(args, fmt); 771f7c21177STheodore Ts'o vaf.fmt = fmt; 772f7c21177STheodore Ts'o vaf.va = &args; 773c398eda0STheodore Ts'o if (block) 774d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 775d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 776d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 777d9ee81daSJoe Perches block, current->comm, &vaf); 778d9ee81daSJoe Perches else 779d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 780d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 781d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 782d9ee81daSJoe Perches current->comm, &vaf); 783273df556SFrank Mayhar va_end(args); 784efbed4dcSTheodore Ts'o } 785e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 78654d3adbcSTheodore Ts'o function, line); 787273df556SFrank Mayhar } 788273df556SFrank Mayhar 789e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 790f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 791f7c21177STheodore Ts'o const char *fmt, ...) 792273df556SFrank Mayhar { 793273df556SFrank Mayhar va_list args; 794f7c21177STheodore Ts'o struct va_format vaf; 795496ad9aaSAl Viro struct inode *inode = file_inode(file); 796273df556SFrank Mayhar char pathname[80], *path; 797273df556SFrank Mayhar 7980db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7990db1ff22STheodore Ts'o return; 8000db1ff22STheodore Ts'o 801ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 802efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8039bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 804f9a62d09SDan Carpenter if (IS_ERR(path)) 805273df556SFrank Mayhar path = "(unknown)"; 806f7c21177STheodore Ts'o va_start(args, fmt); 807f7c21177STheodore Ts'o vaf.fmt = fmt; 808f7c21177STheodore Ts'o vaf.va = &args; 809d9ee81daSJoe Perches if (block) 810d9ee81daSJoe Perches printk(KERN_CRIT 811d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 812d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 813d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 814d9ee81daSJoe Perches block, current->comm, path, &vaf); 815d9ee81daSJoe Perches else 816d9ee81daSJoe Perches printk(KERN_CRIT 817d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 818d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 819d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 820d9ee81daSJoe Perches current->comm, path, &vaf); 821273df556SFrank Mayhar va_end(args); 822efbed4dcSTheodore Ts'o } 823e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 82454d3adbcSTheodore Ts'o function, line); 825273df556SFrank Mayhar } 826273df556SFrank Mayhar 827722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 828ac27a0ecSDave Kleikamp char nbuf[16]) 829ac27a0ecSDave Kleikamp { 830ac27a0ecSDave Kleikamp char *errstr = NULL; 831ac27a0ecSDave Kleikamp 832ac27a0ecSDave Kleikamp switch (errno) { 8336a797d27SDarrick J. Wong case -EFSCORRUPTED: 8346a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8356a797d27SDarrick J. Wong break; 8366a797d27SDarrick J. Wong case -EFSBADCRC: 8376a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8386a797d27SDarrick J. Wong break; 839ac27a0ecSDave Kleikamp case -EIO: 840ac27a0ecSDave Kleikamp errstr = "IO failure"; 841ac27a0ecSDave Kleikamp break; 842ac27a0ecSDave Kleikamp case -ENOMEM: 843ac27a0ecSDave Kleikamp errstr = "Out of memory"; 844ac27a0ecSDave Kleikamp break; 845ac27a0ecSDave Kleikamp case -EROFS: 84678f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 84778f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 848ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 849ac27a0ecSDave Kleikamp else 850ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 851ac27a0ecSDave Kleikamp break; 852ac27a0ecSDave Kleikamp default: 853ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 854ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 855ac27a0ecSDave Kleikamp * NULL. */ 856ac27a0ecSDave Kleikamp if (nbuf) { 857ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 858ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 859ac27a0ecSDave Kleikamp errstr = nbuf; 860ac27a0ecSDave Kleikamp } 861ac27a0ecSDave Kleikamp break; 862ac27a0ecSDave Kleikamp } 863ac27a0ecSDave Kleikamp 864ac27a0ecSDave Kleikamp return errstr; 865ac27a0ecSDave Kleikamp } 866ac27a0ecSDave Kleikamp 867617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 868ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 869ac27a0ecSDave Kleikamp 870c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 871c398eda0STheodore Ts'o unsigned int line, int errno) 872ac27a0ecSDave Kleikamp { 873ac27a0ecSDave Kleikamp char nbuf[16]; 874ac27a0ecSDave Kleikamp const char *errstr; 875ac27a0ecSDave Kleikamp 8760db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 8770db1ff22STheodore Ts'o return; 8780db1ff22STheodore Ts'o 879ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 880ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 881ac27a0ecSDave Kleikamp * an error. */ 882bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 883ac27a0ecSDave Kleikamp return; 884ac27a0ecSDave Kleikamp 885efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 886617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 887c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 888c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 889efbed4dcSTheodore Ts'o } 890ac27a0ecSDave Kleikamp 891e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 892ac27a0ecSDave Kleikamp } 893ac27a0ecSDave Kleikamp 894e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 895e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 896b31e1552SEric Sandeen { 8970ff2ea7dSJoe Perches struct va_format vaf; 898b31e1552SEric Sandeen va_list args; 899b31e1552SEric Sandeen 9001cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 901efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 902efbed4dcSTheodore Ts'o return; 903efbed4dcSTheodore Ts'o 904b31e1552SEric Sandeen va_start(args, fmt); 9050ff2ea7dSJoe Perches vaf.fmt = fmt; 9060ff2ea7dSJoe Perches vaf.va = &args; 9070ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 908b31e1552SEric Sandeen va_end(args); 909b31e1552SEric Sandeen } 910b31e1552SEric Sandeen 9111cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9121cf006edSDmitry Monakhov { 9131cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9141cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9151cf006edSDmitry Monakhov "EXT4-fs warning"); 9161cf006edSDmitry Monakhov } 917b03a2f7eSAndreas Dilger 91812062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 919c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 920ac27a0ecSDave Kleikamp { 9210ff2ea7dSJoe Perches struct va_format vaf; 922ac27a0ecSDave Kleikamp va_list args; 923ac27a0ecSDave Kleikamp 924b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 925efbed4dcSTheodore Ts'o return; 926efbed4dcSTheodore Ts'o 927ac27a0ecSDave Kleikamp va_start(args, fmt); 9280ff2ea7dSJoe Perches vaf.fmt = fmt; 9290ff2ea7dSJoe Perches vaf.va = &args; 9300ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9310ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 932ac27a0ecSDave Kleikamp va_end(args); 933ac27a0ecSDave Kleikamp } 934ac27a0ecSDave Kleikamp 935b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 936b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 937b03a2f7eSAndreas Dilger { 938b03a2f7eSAndreas Dilger struct va_format vaf; 939b03a2f7eSAndreas Dilger va_list args; 940b03a2f7eSAndreas Dilger 941b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 942b03a2f7eSAndreas Dilger return; 943b03a2f7eSAndreas Dilger 944b03a2f7eSAndreas Dilger va_start(args, fmt); 945b03a2f7eSAndreas Dilger vaf.fmt = fmt; 946b03a2f7eSAndreas Dilger vaf.va = &args; 947b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 948b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 949b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 950b03a2f7eSAndreas Dilger va_end(args); 951b03a2f7eSAndreas Dilger } 952b03a2f7eSAndreas Dilger 953e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 954e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 955e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 956e29136f8STheodore Ts'o const char *fmt, ...) 9575d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9585d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9595d1b1b3fSAneesh Kumar K.V { 9600ff2ea7dSJoe Perches struct va_format vaf; 9615d1b1b3fSAneesh Kumar K.V va_list args; 9625d1b1b3fSAneesh Kumar K.V 9630db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9640db1ff22STheodore Ts'o return; 9650db1ff22STheodore Ts'o 966ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 967efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 9685d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 9690ff2ea7dSJoe Perches vaf.fmt = fmt; 9700ff2ea7dSJoe Perches vaf.va = &args; 97121149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 972e29136f8STheodore Ts'o sb->s_id, function, line, grp); 973e29136f8STheodore Ts'o if (ino) 9740ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 975e29136f8STheodore Ts'o if (block) 976efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 977efbed4dcSTheodore Ts'o (unsigned long long) block); 9780ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 9795d1b1b3fSAneesh Kumar K.V va_end(args); 980efbed4dcSTheodore Ts'o } 9815d1b1b3fSAneesh Kumar K.V 982c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 983327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 984327eaf73STheodore Ts'o WARN_ON_ONCE(1); 985e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 9862d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 9872d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 9882d01ddc8SJan Kara line); 989c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 9902d01ddc8SJan Kara } 9915d1b1b3fSAneesh Kumar K.V return; 9925d1b1b3fSAneesh Kumar K.V } 9935d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 994e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 9955d1b1b3fSAneesh Kumar K.V /* 9965d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 9975d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 9985d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 9995d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10005d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 100125985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10025d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10035d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10045d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10055d1b1b3fSAneesh Kumar K.V */ 10065d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10075d1b1b3fSAneesh Kumar K.V return; 10085d1b1b3fSAneesh Kumar K.V } 10095d1b1b3fSAneesh Kumar K.V 1010db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1011db79e6d1SWang Shilong ext4_group_t group, 1012db79e6d1SWang Shilong unsigned int flags) 1013db79e6d1SWang Shilong { 1014db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1015db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1016db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10179af0b3d1SWang Shilong int ret; 1018db79e6d1SWang Shilong 10199af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10209af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10219af0b3d1SWang Shilong &grp->bb_state); 10229af0b3d1SWang Shilong if (!ret) 1023db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1024db79e6d1SWang Shilong grp->bb_free); 1025db79e6d1SWang Shilong } 1026db79e6d1SWang Shilong 10279af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10289af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10299af0b3d1SWang Shilong &grp->bb_state); 10309af0b3d1SWang Shilong if (!ret && gdp) { 1031db79e6d1SWang Shilong int count; 1032db79e6d1SWang Shilong 1033db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1034db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1035db79e6d1SWang Shilong count); 1036db79e6d1SWang Shilong } 1037db79e6d1SWang Shilong } 1038db79e6d1SWang Shilong } 1039db79e6d1SWang Shilong 1040617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1041ac27a0ecSDave Kleikamp { 1042617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1043ac27a0ecSDave Kleikamp 1044617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1045ac27a0ecSDave Kleikamp return; 1046ac27a0ecSDave Kleikamp 104712062dddSEric Sandeen ext4_warning(sb, 1048ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1049ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1050617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1051ac27a0ecSDave Kleikamp 1052617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1053617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1054617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1055ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1056ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1057ac27a0ecSDave Kleikamp 1058ac27a0ecSDave Kleikamp /* 1059ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1060ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1061ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1062ac27a0ecSDave Kleikamp */ 1063ac27a0ecSDave Kleikamp } 1064ac27a0ecSDave Kleikamp 1065ac27a0ecSDave Kleikamp /* 1066ac27a0ecSDave Kleikamp * Open the external journal device 1067ac27a0ecSDave Kleikamp */ 1068b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1069ac27a0ecSDave Kleikamp { 1070ac27a0ecSDave Kleikamp struct block_device *bdev; 1071ac27a0ecSDave Kleikamp 1072d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1073ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1074ac27a0ecSDave Kleikamp goto fail; 1075ac27a0ecSDave Kleikamp return bdev; 1076ac27a0ecSDave Kleikamp 1077ac27a0ecSDave Kleikamp fail: 1078ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1079ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1080ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1081ac27a0ecSDave Kleikamp return NULL; 1082ac27a0ecSDave Kleikamp } 1083ac27a0ecSDave Kleikamp 1084ac27a0ecSDave Kleikamp /* 1085ac27a0ecSDave Kleikamp * Release the journal device 1086ac27a0ecSDave Kleikamp */ 10874385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1088ac27a0ecSDave Kleikamp { 10894385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1090ac27a0ecSDave Kleikamp } 1091ac27a0ecSDave Kleikamp 10924385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1093ac27a0ecSDave Kleikamp { 1094ac27a0ecSDave Kleikamp struct block_device *bdev; 1095ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1096ac27a0ecSDave Kleikamp if (bdev) { 10974385bab1SAl Viro ext4_blkdev_put(bdev); 1098ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1099ac27a0ecSDave Kleikamp } 1100ac27a0ecSDave Kleikamp } 1101ac27a0ecSDave Kleikamp 1102ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1103ac27a0ecSDave Kleikamp { 1104617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1105ac27a0ecSDave Kleikamp } 1106ac27a0ecSDave Kleikamp 1107617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1108ac27a0ecSDave Kleikamp { 1109ac27a0ecSDave Kleikamp struct list_head *l; 1110ac27a0ecSDave Kleikamp 1111b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1112ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1113ac27a0ecSDave Kleikamp 1114ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1115ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1116ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1117ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1118ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1119ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1120ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1121ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1122ac27a0ecSDave Kleikamp } 1123ac27a0ecSDave Kleikamp } 1124ac27a0ecSDave Kleikamp 1125957153fcSJan Kara #ifdef CONFIG_QUOTA 1126957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1127957153fcSJan Kara 1128957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1129957153fcSJan Kara { 1130957153fcSJan Kara int type; 1131957153fcSJan Kara 1132957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1133957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1134957153fcSJan Kara ext4_quota_off(sb, type); 1135957153fcSJan Kara } 113633458eabSTheodore Ts'o 113733458eabSTheodore Ts'o /* 113833458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 113933458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 114033458eabSTheodore Ts'o */ 114133458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 114233458eabSTheodore Ts'o struct ext4_sb_info *sbi, 114333458eabSTheodore Ts'o int type) 114433458eabSTheodore Ts'o { 114533458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 114633458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 114733458eabSTheodore Ts'o } 1148957153fcSJan Kara #else 1149957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1150957153fcSJan Kara { 1151957153fcSJan Kara } 1152957153fcSJan Kara #endif 1153957153fcSJan Kara 1154617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1155ac27a0ecSDave Kleikamp { 1156617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1157617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11581d0c3924STheodore Ts'o struct buffer_head **group_desc; 11597c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 116097abd7d4STheodore Ts'o int aborted = 0; 1161ef2cabf7SHidehiro Kawai int i, err; 1162ac27a0ecSDave Kleikamp 1163857ac889SLukas Czerner ext4_unregister_li_request(sb); 1164957153fcSJan Kara ext4_quota_off_umount(sb); 1165e0ccfd95SChristoph Hellwig 1166c92dc856SJan Kara flush_work(&sbi->s_error_work); 11672e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 11684c0425ffSMingming Cao 11695e47868fSRitesh Harjani /* 11705e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 11715e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 11725e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 11735e47868fSRitesh Harjani */ 11745e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 11755e47868fSRitesh Harjani 11760390131bSFrank Mayhar if (sbi->s_journal) { 117797abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1178ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 117947b4a50bSJan Kara sbi->s_journal = NULL; 1180878520acSTheodore Ts'o if ((err < 0) && !aborted) { 118154d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 11820390131bSFrank Mayhar } 1183878520acSTheodore Ts'o } 1184d4edac31SJosef Bacik 1185d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 11869105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1187d4edac31SJosef Bacik ext4_release_system_zone(sb); 1188d4edac31SJosef Bacik ext4_mb_release(sb); 1189d4edac31SJosef Bacik ext4_ext_release(sb); 1190d4edac31SJosef Bacik 1191bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1192e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 1193ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1194ac27a0ecSDave Kleikamp } 1195bc98a42cSDavid Howells if (!sb_rdonly(sb)) 11964392fbc4SJan Kara ext4_commit_super(sb); 1197a8e25a83SArtem Bityutskiy 11981d0c3924STheodore Ts'o rcu_read_lock(); 11991d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1200ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12011d0c3924STheodore Ts'o brelse(group_desc[i]); 12021d0c3924STheodore Ts'o kvfree(group_desc); 12037c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12047c990728SSuraj Jitindar Singh if (flex_groups) { 12057c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12067c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12077c990728SSuraj Jitindar Singh kvfree(flex_groups); 12087c990728SSuraj Jitindar Singh } 12091d0c3924STheodore Ts'o rcu_read_unlock(); 121057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1211ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1212ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 121357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1214efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1215bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1216ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1217a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 121833458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1219ac27a0ecSDave Kleikamp #endif 1220ac27a0ecSDave Kleikamp 1221ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1222ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1223ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1224ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1225ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1226ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1227837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1228ac27a0ecSDave Kleikamp 122989d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1230f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1231ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1232ac27a0ecSDave Kleikamp /* 1233ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1234ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1235ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1236ac27a0ecSDave Kleikamp */ 1237ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1238ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1239617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1240ac27a0ecSDave Kleikamp } 124150c15df6SChengguang Xu 1242dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1243dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 124450c15df6SChengguang Xu 124547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 124647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 124750c15df6SChengguang Xu 1248c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 1249c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 12509060dd2cSEric Sandeen brelse(sbi->s_sbh); 1251ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12523197ebdbSTheodore Ts'o /* 12533197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12543197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12553197ebdbSTheodore Ts'o */ 12563197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12573197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 12580441984aSDarrick J. Wong if (sbi->s_chksum_driver) 12590441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1260705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 12615e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1262ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 1263c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1264f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1265c83ad55eSGabriel Krisman Bertazi #endif 1266ac27a0ecSDave Kleikamp kfree(sbi); 1267ac27a0ecSDave Kleikamp } 1268ac27a0ecSDave Kleikamp 1269e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1270ac27a0ecSDave Kleikamp 1271ac27a0ecSDave Kleikamp /* 1272ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1273ac27a0ecSDave Kleikamp */ 1274617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1275ac27a0ecSDave Kleikamp { 1276617ba13bSMingming Cao struct ext4_inode_info *ei; 1277ac27a0ecSDave Kleikamp 1278e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1279ac27a0ecSDave Kleikamp if (!ei) 1280ac27a0ecSDave Kleikamp return NULL; 12810b8e58a1SAndreas Dilger 1282ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1283202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1284c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 128527bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1286c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 12879a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 12889a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1289edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1290eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1291edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1292dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1293d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1294d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 12951dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1296a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1297a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 129896c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1299a9e7f447SDmitry Monakhov #endif 13008aefcd55STheodore Ts'o ei->jinode = NULL; 13012e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1302744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1303b436b9beSJan Kara ei->i_sync_tid = 0; 1304b436b9beSJan Kara ei->i_datasync_tid = 0; 1305e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13062e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1307aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1308aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1309ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1310ac27a0ecSDave Kleikamp } 1311ac27a0ecSDave Kleikamp 13127ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13137ff9c073STheodore Ts'o { 13147ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13157ff9c073STheodore Ts'o 131629b3692eSEric Biggers if (!drop) 131729b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 131829b3692eSEric Biggers 13197ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13207ff9c073STheodore Ts'o return drop; 13217ff9c073STheodore Ts'o } 13227ff9c073STheodore Ts'o 132394053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1324fa0d7e3dSNick Piggin { 13252c58d548SEric Biggers fscrypt_free_inode(inode); 1326aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1327aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1328aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1329aa75f4d3SHarshad Shirwadkar } 1330fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1331fa0d7e3dSNick Piggin } 1332fa0d7e3dSNick Piggin 1333617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1334ac27a0ecSDave Kleikamp { 13359f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1336b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1337b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1338b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13399f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13409f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13419f7dd93dSVasily Averin true); 13429f7dd93dSVasily Averin dump_stack(); 13439f7dd93dSVasily Averin } 1344ac27a0ecSDave Kleikamp } 1345ac27a0ecSDave Kleikamp 134651cc5068SAlexey Dobriyan static void init_once(void *foo) 1347ac27a0ecSDave Kleikamp { 1348617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1349ac27a0ecSDave Kleikamp 1350ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1351ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 13520e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1353ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1354ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1355aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1356ac27a0ecSDave Kleikamp } 1357ac27a0ecSDave Kleikamp 1358e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1359ac27a0ecSDave Kleikamp { 1360f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1361f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1362f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1363f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1364f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1365f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 136620c2df83SPaul Mundt init_once); 1367617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1368ac27a0ecSDave Kleikamp return -ENOMEM; 1369ac27a0ecSDave Kleikamp return 0; 1370ac27a0ecSDave Kleikamp } 1371ac27a0ecSDave Kleikamp 1372ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1373ac27a0ecSDave Kleikamp { 13748c0a8537SKirill A. Shutemov /* 13758c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 13768c0a8537SKirill A. Shutemov * destroy cache. 13778c0a8537SKirill A. Shutemov */ 13788c0a8537SKirill A. Shutemov rcu_barrier(); 1379617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1380ac27a0ecSDave Kleikamp } 1381ac27a0ecSDave Kleikamp 13820930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1383ac27a0ecSDave Kleikamp { 1384aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 13850930fcc1SAl Viro invalidate_inode_buffers(inode); 1386dbd5768fSJan Kara clear_inode(inode); 138727bc446eSbrookxu ext4_discard_preallocations(inode, 0); 138851865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1389f4c2d372SJan Kara dquot_drop(inode); 13908aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 13918aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 13928aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 13938aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 13948aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 13958aefcd55STheodore Ts'o } 13963d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1397c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1398ac27a0ecSDave Kleikamp } 1399ac27a0ecSDave Kleikamp 14001b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14011b961ac0SChristoph Hellwig u64 ino, u32 generation) 1402ac27a0ecSDave Kleikamp { 1403ac27a0ecSDave Kleikamp struct inode *inode; 1404ac27a0ecSDave Kleikamp 14058a363970STheodore Ts'o /* 1406ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1407ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1408ac27a0ecSDave Kleikamp */ 14098a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14101d1fe1eeSDavid Howells if (IS_ERR(inode)) 14111d1fe1eeSDavid Howells return ERR_CAST(inode); 14121d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1413ac27a0ecSDave Kleikamp iput(inode); 1414ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1415ac27a0ecSDave Kleikamp } 14161b961ac0SChristoph Hellwig 14171b961ac0SChristoph Hellwig return inode; 1418ac27a0ecSDave Kleikamp } 14191b961ac0SChristoph Hellwig 14201b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14211b961ac0SChristoph Hellwig int fh_len, int fh_type) 14221b961ac0SChristoph Hellwig { 14231b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14241b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14251b961ac0SChristoph Hellwig } 14261b961ac0SChristoph Hellwig 14271b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14281b961ac0SChristoph Hellwig int fh_len, int fh_type) 14291b961ac0SChristoph Hellwig { 14301b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14311b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1432ac27a0ecSDave Kleikamp } 1433ac27a0ecSDave Kleikamp 1434fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1435fde87268STheodore Ts'o { 1436fde87268STheodore Ts'o struct writeback_control wbc = { 1437fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1438fde87268STheodore Ts'o }; 1439fde87268STheodore Ts'o 1440fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1441fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1442fde87268STheodore Ts'o } 1443fde87268STheodore Ts'o 1444c39a7f84SToshiyuki Okajima /* 1445c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1446c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1447c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1448c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1449c39a7f84SToshiyuki Okajima */ 14500b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 14510b8e58a1SAndreas Dilger gfp_t wait) 1452c39a7f84SToshiyuki Okajima { 1453c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1454c39a7f84SToshiyuki Okajima 1455c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1456c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1457c39a7f84SToshiyuki Okajima return 0; 1458c39a7f84SToshiyuki Okajima if (journal) 1459529a781eSzhangyi (F) return jbd2_journal_try_to_free_buffers(journal, page); 1460529a781eSzhangyi (F) 1461c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1462c39a7f84SToshiyuki Okajima } 1463c39a7f84SToshiyuki Okajima 1464643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1465a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1466a7550b30SJaegeuk Kim { 1467a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1468a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1469a7550b30SJaegeuk Kim } 1470a7550b30SJaegeuk Kim 1471a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1472a7550b30SJaegeuk Kim void *fs_data) 1473a7550b30SJaegeuk Kim { 14742f8f5e76SEric Biggers handle_t *handle = fs_data; 1475c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1476a7550b30SJaegeuk Kim 14779ce0151aSEric Biggers /* 14789ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 14799ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 14809ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 14819ce0151aSEric Biggers * the filename "lost+found" itself. 14829ce0151aSEric Biggers */ 14839ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 14849ce0151aSEric Biggers return -EPERM; 1485a7550b30SJaegeuk Kim 14867d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 14877d3e06a8SRoss Zwisler return -EINVAL; 14887d3e06a8SRoss Zwisler 1489b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1490b383a73fSIra Weiny return -EOPNOTSUPP; 1491b383a73fSIra Weiny 149294840e3cSEric Biggers res = ext4_convert_inline_data(inode); 149394840e3cSEric Biggers if (res) 149494840e3cSEric Biggers return res; 149594840e3cSEric Biggers 14962f8f5e76SEric Biggers /* 14972f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 14982f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 14992f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15002f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15012f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15022f8f5e76SEric Biggers */ 15032f8f5e76SEric Biggers 15042f8f5e76SEric Biggers if (handle) { 15052f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15062f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15072f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15082f8f5e76SEric Biggers ctx, len, 0); 1509a7550b30SJaegeuk Kim if (!res) { 1510a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1511a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1512a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1513a3caa24bSJan Kara /* 15142ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15152ee6a576SEric Biggers * S_DAX may be disabled 1516a3caa24bSJan Kara */ 1517043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1518a7550b30SJaegeuk Kim } 1519a7550b30SJaegeuk Kim return res; 1520a7550b30SJaegeuk Kim } 1521a7550b30SJaegeuk Kim 1522b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1523b8cb5a54STahsin Erdogan if (res) 1524b8cb5a54STahsin Erdogan return res; 15252f8f5e76SEric Biggers retry: 1526af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1527af65207cSTahsin Erdogan &credits); 1528dec214d0STahsin Erdogan if (res) 1529dec214d0STahsin Erdogan return res; 1530dec214d0STahsin Erdogan 1531c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1532a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1533a7550b30SJaegeuk Kim return PTR_ERR(handle); 1534a7550b30SJaegeuk Kim 15352f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15362f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15372f8f5e76SEric Biggers ctx, len, 0); 1538a7550b30SJaegeuk Kim if (!res) { 1539a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15402ee6a576SEric Biggers /* 15412ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15422ee6a576SEric Biggers * S_DAX may be disabled 15432ee6a576SEric Biggers */ 1544043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1545a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1546a7550b30SJaegeuk Kim if (res) 1547a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1548a7550b30SJaegeuk Kim } 1549a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15502f8f5e76SEric Biggers 15512f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15522f8f5e76SEric Biggers goto retry; 1553a7550b30SJaegeuk Kim if (!res) 1554a7550b30SJaegeuk Kim res = res2; 1555a7550b30SJaegeuk Kim return res; 1556a7550b30SJaegeuk Kim } 1557a7550b30SJaegeuk Kim 1558ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1559a7550b30SJaegeuk Kim { 1560ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1561a7550b30SJaegeuk Kim } 1562a7550b30SJaegeuk Kim 1563b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1564b925acb8SEric Biggers { 1565b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1566b925acb8SEric Biggers } 1567b925acb8SEric Biggers 1568b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1569b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1570b925acb8SEric Biggers { 1571b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1572b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1573b925acb8SEric Biggers } 1574b925acb8SEric Biggers 15756f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1576a5d431efSEric Biggers .key_prefix = "ext4:", 1577a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1578a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1579ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1580a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1581e12ee683SEric Biggers .max_namelen = EXT4_NAME_LEN, 1582b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1583b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1584a7550b30SJaegeuk Kim }; 1585a7550b30SJaegeuk Kim #endif 1586a7550b30SJaegeuk Kim 1587ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1588d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1589689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1590ac27a0ecSDave Kleikamp 1591617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1592617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1593617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1594617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1595617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15966f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15978c54ca9cSAl Viro const struct path *path); 1598617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1599617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1600ac27a0ecSDave Kleikamp size_t len, loff_t off); 1601617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1602ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16037c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16047c319d32SAditya Kali unsigned int flags); 16057c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1606ac27a0ecSDave Kleikamp 160796c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 160896c7e0d9SJan Kara { 160996c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 161096c7e0d9SJan Kara } 161196c7e0d9SJan Kara 161261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 161360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1614617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1615617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1616617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1617617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1618a5b5ee32SJan Kara .write_info = ext4_write_info, 1619a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1620a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1621040cb378SLi Xi .get_projid = ext4_get_projid, 16227a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1623ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1624ac27a0ecSDave Kleikamp }; 1625ac27a0ecSDave Kleikamp 16260d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1627617ba13bSMingming Cao .quota_on = ext4_quota_on, 1628ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1629287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16300a240339SJan Kara .get_state = dquot_get_state, 1631287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1632287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16336332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16346332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1635ac27a0ecSDave Kleikamp }; 1636ac27a0ecSDave Kleikamp #endif 1637ac27a0ecSDave Kleikamp 1638ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1639617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 164094053139SAl Viro .free_inode = ext4_free_in_core_inode, 1641617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1642617ba13bSMingming Cao .write_inode = ext4_write_inode, 1643617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16447ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16450930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1646617ba13bSMingming Cao .put_super = ext4_put_super, 1647617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1648c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1649c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1650617ba13bSMingming Cao .statfs = ext4_statfs, 1651617ba13bSMingming Cao .remount_fs = ext4_remount, 1652617ba13bSMingming Cao .show_options = ext4_show_options, 1653ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1654617ba13bSMingming Cao .quota_read = ext4_quota_read, 1655617ba13bSMingming Cao .quota_write = ext4_quota_write, 165696c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1657ac27a0ecSDave Kleikamp #endif 1658c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1659ac27a0ecSDave Kleikamp }; 1660ac27a0ecSDave Kleikamp 166139655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16621b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16631b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1664617ba13bSMingming Cao .get_parent = ext4_get_parent, 1665fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1666ac27a0ecSDave Kleikamp }; 1667ac27a0ecSDave Kleikamp 1668ac27a0ecSDave Kleikamp enum { 1669ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1670ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 167172578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1672ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 167372578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1674ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1675ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1676ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16776ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16784f74d15fSEric Biggers Opt_inlinecrypt, 1679ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 16805a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1681ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16829cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 16839cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1684327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1685327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1686670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 16871449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16885328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1689744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1690fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1691cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 169221175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 16938016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 169499c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16958016e29fSHarshad Shirwadkar #endif 1696ac27a0ecSDave Kleikamp }; 1697ac27a0ecSDave Kleikamp 1698a447c093SSteven Whitehouse static const match_table_t tokens = { 1699ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1700ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1701ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1702ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1703ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1704ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1705ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1706ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1707ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1708ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1709ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1710ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1711ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1712ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 171372578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 171472578c33STheodore Ts'o {Opt_removed, "orlov"}, 1715ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1716ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1717ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1718ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1719e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 17205a916be1STheodore Ts'o {Opt_noload, "noload"}, 172172578c33STheodore Ts'o {Opt_removed, "nobh"}, 172272578c33STheodore Ts'o {Opt_removed, "bh"}, 1723ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 172430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 172530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1726ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1727ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1728818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1729c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1730818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1731ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1732ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1733ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1734ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 17355bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 17365bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1737ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1738ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1739ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1740ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1741ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1742ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 17435a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1744ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1745ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1746ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1747ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 174849da9392SJan Kara {Opt_prjquota, "prjquota"}, 1749ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 175006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 175106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 175225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1753923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 17549cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 17559cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 17569cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1757c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 175864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1759327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1760327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1761a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1762a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1763670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1764dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 176536ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 176636ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 17676fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 17686fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1769240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1770b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1771afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 177206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 177306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1774744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1775244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1776744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 17775328e635SEric Sandeen {Opt_discard, "discard"}, 17785328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1779fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1780fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1781fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 17828016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 178399c880deSHarshad Shirwadkar {Opt_fc_debug_force, "fc_debug_force"}, 17848016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"}, 17858016e29fSHarshad Shirwadkar #endif 1786df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1787ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 17886ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 17894f74d15fSEric Biggers {Opt_inlinecrypt, "inlinecrypt"}, 1790cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1791cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 179221175ca4SHarshad Shirwadkar {Opt_removed, "prefetch_block_bitmaps"}, 179321175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, 1794196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, 1795c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1796c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1797c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1798c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1799c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1800f3f12faaSJosef Bacik {Opt_err, NULL}, 1801ac27a0ecSDave Kleikamp }; 1802ac27a0ecSDave Kleikamp 1803617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1804ac27a0ecSDave Kleikamp { 1805617ba13bSMingming Cao ext4_fsblk_t sb_block; 1806ac27a0ecSDave Kleikamp char *options = (char *) *data; 1807ac27a0ecSDave Kleikamp 1808ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1809ac27a0ecSDave Kleikamp return 1; /* Default location */ 18100b8e58a1SAndreas Dilger 1811ac27a0ecSDave Kleikamp options += 3; 18120b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1813ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1814ac27a0ecSDave Kleikamp if (*options && *options != ',') { 18154776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1816ac27a0ecSDave Kleikamp (char *) *data); 1817ac27a0ecSDave Kleikamp return 1; 1818ac27a0ecSDave Kleikamp } 1819ac27a0ecSDave Kleikamp if (*options == ',') 1820ac27a0ecSDave Kleikamp options++; 1821ac27a0ecSDave Kleikamp *data = (void *) options; 18220b8e58a1SAndreas Dilger 1823ac27a0ecSDave Kleikamp return sb_block; 1824ac27a0ecSDave Kleikamp } 1825ac27a0ecSDave Kleikamp 1826b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1827196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1828196e402aSHarshad Shirwadkar 1829d6006186SEric Biggers static const char deprecated_msg[] = 1830d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1831437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1832b3881f74STheodore Ts'o 183356c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 183456c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 183556c50f11SDmitry Monakhov { 183656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 183733458eabSTheodore Ts'o char *qname, *old_qname = get_qf_name(sb, sbi, qtype); 183803dafb5fSChen Gang int ret = -1; 183956c50f11SDmitry Monakhov 184033458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && !old_qname) { 184156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 184256c50f11SDmitry Monakhov "Cannot change journaled " 184356c50f11SDmitry Monakhov "quota options when quota turned on"); 184457f73c2cSTheodore Ts'o return -1; 184556c50f11SDmitry Monakhov } 1846e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1847c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1848c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1849c325a67cSTheodore Ts'o return 1; 1850262b4662SJan Kara } 185156c50f11SDmitry Monakhov qname = match_strdup(args); 185256c50f11SDmitry Monakhov if (!qname) { 185356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 185456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 185557f73c2cSTheodore Ts'o return -1; 185656c50f11SDmitry Monakhov } 185733458eabSTheodore Ts'o if (old_qname) { 185833458eabSTheodore Ts'o if (strcmp(old_qname, qname) == 0) 185903dafb5fSChen Gang ret = 1; 186003dafb5fSChen Gang else 186156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 186203dafb5fSChen Gang "%s quota file already specified", 186303dafb5fSChen Gang QTYPE2NAME(qtype)); 186403dafb5fSChen Gang goto errout; 186556c50f11SDmitry Monakhov } 186603dafb5fSChen Gang if (strchr(qname, '/')) { 186756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 186856c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 186903dafb5fSChen Gang goto errout; 187056c50f11SDmitry Monakhov } 187133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], qname); 1872fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 187356c50f11SDmitry Monakhov return 1; 187403dafb5fSChen Gang errout: 187503dafb5fSChen Gang kfree(qname); 187603dafb5fSChen Gang return ret; 187756c50f11SDmitry Monakhov } 187856c50f11SDmitry Monakhov 187956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 188056c50f11SDmitry Monakhov { 188156c50f11SDmitry Monakhov 188256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 188333458eabSTheodore Ts'o char *old_qname = get_qf_name(sb, sbi, qtype); 188456c50f11SDmitry Monakhov 188533458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && old_qname) { 188656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 188756c50f11SDmitry Monakhov " when quota turned on"); 188857f73c2cSTheodore Ts'o return -1; 188956c50f11SDmitry Monakhov } 189033458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], NULL); 189133458eabSTheodore Ts'o synchronize_rcu(); 189233458eabSTheodore Ts'o kfree(old_qname); 189356c50f11SDmitry Monakhov return 1; 189456c50f11SDmitry Monakhov } 189556c50f11SDmitry Monakhov #endif 189656c50f11SDmitry Monakhov 189726092bf5STheodore Ts'o #define MOPT_SET 0x0001 189826092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 189926092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 190026092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 190126092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 190226092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 190326092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 190426092bf5STheodore Ts'o #define MOPT_Q 0 190526092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 190626092bf5STheodore Ts'o #else 190726092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 190826092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 190926092bf5STheodore Ts'o #endif 191026092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 19118dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 19128dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 19138dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1914ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 19159cb20f94SIra Weiny #define MOPT_SKIP 0x0800 1916995a3ed6SHarshad Shirwadkar #define MOPT_2 0x1000 191726092bf5STheodore Ts'o 191826092bf5STheodore Ts'o static const struct mount_opts { 191926092bf5STheodore Ts'o int token; 192026092bf5STheodore Ts'o int mount_opt; 192126092bf5STheodore Ts'o int flags; 192226092bf5STheodore Ts'o } ext4_mount_opts[] = { 192326092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 192426092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 192526092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 192626092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 192726092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 192826092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 19298dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 19308dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 19318dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 19328dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 193326092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 193426092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 19358dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 19368dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19378dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 193859d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1939327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1940327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1941c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1942c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 19438dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 19441e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 194526092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 19468dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 19471e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19488dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 194926092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 195026092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 195126092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 19528dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 19537915a861SAles Novak MOPT_NO_EXT2}, 19548dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 19557915a861SAles Novak MOPT_NO_EXT2}, 195626092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 195726092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 195826092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 195926092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 196026092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 196126092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 196226092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 196326092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 196426092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 196526092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 19669cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 19679cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 19689cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 19699cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 19709cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 19719cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 19729cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 197326092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 19740efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 19750efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 19765ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 19775ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 19785ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 19798dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 19808dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 19818dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 19828dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 198326092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 198426092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 198526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 198626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 198726092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 198826092bf5STheodore Ts'o #else 198926092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 199026092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 199126092bf5STheodore Ts'o #endif 199226092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 199326092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1994670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 199526092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 199626092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 199726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 199826092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 199926092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 200049da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 200149da9392SJan Kara MOPT_SET | MOPT_Q}, 200226092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 200349da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 200449da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 2005174fe5baSKaixu Xia {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING}, 2006174fe5baSKaixu Xia {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING}, 200726092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 200826092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 200926092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 201026092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 201126092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 2012df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 2013ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 2014cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 201521175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 20163d392b26STheodore Ts'o MOPT_SET}, 2017196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, 201899c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 20190f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 20200f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 20218016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, 0, MOPT_GTE0}, 20228016e29fSHarshad Shirwadkar #endif 202326092bf5STheodore Ts'o {Opt_err, 0, 0} 202426092bf5STheodore Ts'o }; 202526092bf5STheodore Ts'o 2026c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 2027c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 2028c83ad55eSGabriel Krisman Bertazi __u16 magic; 2029c83ad55eSGabriel Krisman Bertazi char *name; 2030c83ad55eSGabriel Krisman Bertazi char *version; 2031c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 2032c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 2033c83ad55eSGabriel Krisman Bertazi }; 2034c83ad55eSGabriel Krisman Bertazi 2035c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 2036c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 2037c83ad55eSGabriel Krisman Bertazi __u16 *flags) 2038c83ad55eSGabriel Krisman Bertazi { 2039c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 2040c83ad55eSGabriel Krisman Bertazi int i; 2041c83ad55eSGabriel Krisman Bertazi 2042c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 2043c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 2044c83ad55eSGabriel Krisman Bertazi break; 2045c83ad55eSGabriel Krisman Bertazi 2046c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 2047c83ad55eSGabriel Krisman Bertazi return -EINVAL; 2048c83ad55eSGabriel Krisman Bertazi 2049c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 2050c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 2051c83ad55eSGabriel Krisman Bertazi 2052c83ad55eSGabriel Krisman Bertazi return 0; 2053c83ad55eSGabriel Krisman Bertazi } 2054c83ad55eSGabriel Krisman Bertazi #endif 2055c83ad55eSGabriel Krisman Bertazi 2056ed318a6cSEric Biggers static int ext4_set_test_dummy_encryption(struct super_block *sb, 2057ed318a6cSEric Biggers const char *opt, 2058ed318a6cSEric Biggers const substring_t *arg, 2059ed318a6cSEric Biggers bool is_remount) 2060ed318a6cSEric Biggers { 2061ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 2062ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 2063ed318a6cSEric Biggers int err; 2064ed318a6cSEric Biggers 2065ed318a6cSEric Biggers /* 2066ed318a6cSEric Biggers * This mount option is just for testing, and it's not worthwhile to 2067ed318a6cSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 2068ed318a6cSEric Biggers * needed to allow it to be set or changed during remount. We do allow 2069ed318a6cSEric Biggers * it to be specified during remount, but only if there is no change. 2070ed318a6cSEric Biggers */ 2071ac4acb1fSEric Biggers if (is_remount && !sbi->s_dummy_enc_policy.policy) { 2072ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2073ed318a6cSEric Biggers "Can't set test_dummy_encryption on remount"); 2074ed318a6cSEric Biggers return -1; 2075ed318a6cSEric Biggers } 2076c8c868abSEric Biggers err = fscrypt_set_test_dummy_encryption(sb, arg->from, 2077ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2078ed318a6cSEric Biggers if (err) { 2079ed318a6cSEric Biggers if (err == -EEXIST) 2080ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2081ed318a6cSEric Biggers "Can't change test_dummy_encryption on remount"); 2082ed318a6cSEric Biggers else if (err == -EINVAL) 2083ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2084ed318a6cSEric Biggers "Value of option \"%s\" is unrecognized", opt); 2085ed318a6cSEric Biggers else 2086ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2087ed318a6cSEric Biggers "Error processing option \"%s\" [%d]", 2088ed318a6cSEric Biggers opt, err); 2089ed318a6cSEric Biggers return -1; 2090ed318a6cSEric Biggers } 2091ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2092ed318a6cSEric Biggers #else 2093ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2094ed318a6cSEric Biggers "Test dummy encryption mount option ignored"); 2095ed318a6cSEric Biggers #endif 2096ed318a6cSEric Biggers return 1; 2097ed318a6cSEric Biggers } 2098ed318a6cSEric Biggers 2099b237e304SHarshad Shirwadkar struct ext4_parsed_options { 2100b237e304SHarshad Shirwadkar unsigned long journal_devnum; 2101b237e304SHarshad Shirwadkar unsigned int journal_ioprio; 2102196e402aSHarshad Shirwadkar int mb_optimize_scan; 2103b237e304SHarshad Shirwadkar }; 2104b237e304SHarshad Shirwadkar 210526092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 2106b237e304SHarshad Shirwadkar substring_t *args, struct ext4_parsed_options *parsed_opts, 2107b237e304SHarshad Shirwadkar int is_remount) 210826092bf5STheodore Ts'o { 210926092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 211026092bf5STheodore Ts'o const struct mount_opts *m; 211108cefc7aSEric W. Biederman kuid_t uid; 211208cefc7aSEric W. Biederman kgid_t gid; 211326092bf5STheodore Ts'o int arg = 0; 211426092bf5STheodore Ts'o 211557f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 211657f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 211757f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 211857f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 211957f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 212057f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 212157f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 212257f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 212357f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 212457f73c2cSTheodore Ts'o #endif 212526092bf5STheodore Ts'o switch (token) { 2126f7048605STheodore Ts'o case Opt_noacl: 2127f7048605STheodore Ts'o case Opt_nouser_xattr: 2128f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 2129f7048605STheodore Ts'o break; 213026092bf5STheodore Ts'o case Opt_sb: 213126092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 213226092bf5STheodore Ts'o case Opt_removed: 21335f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 213426092bf5STheodore Ts'o return 1; 213526092bf5STheodore Ts'o case Opt_abort: 21369b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 213726092bf5STheodore Ts'o return 1; 213826092bf5STheodore Ts'o case Opt_i_version: 2139357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 214026092bf5STheodore Ts'o return 1; 2141a26f4992STheodore Ts'o case Opt_lazytime: 21421751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 2143a26f4992STheodore Ts'o return 1; 2144a26f4992STheodore Ts'o case Opt_nolazytime: 21451751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 2146a26f4992STheodore Ts'o return 1; 21474f74d15fSEric Biggers case Opt_inlinecrypt: 21484f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 21494f74d15fSEric Biggers sb->s_flags |= SB_INLINECRYPT; 21504f74d15fSEric Biggers #else 21514f74d15fSEric Biggers ext4_msg(sb, KERN_ERR, "inline encryption not supported"); 21524f74d15fSEric Biggers #endif 21534f74d15fSEric Biggers return 1; 215426092bf5STheodore Ts'o } 215526092bf5STheodore Ts'o 21565f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 21575f3633e3SJan Kara if (token == m->token) 21585f3633e3SJan Kara break; 21595f3633e3SJan Kara 21605f3633e3SJan Kara if (m->token == Opt_err) { 21615f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 21625f3633e3SJan Kara "or missing value", opt); 21635f3633e3SJan Kara return -1; 21645f3633e3SJan Kara } 21655f3633e3SJan Kara 21668dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 21678dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 21688dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 21698dc0aa8cSTheodore Ts'o return -1; 21708dc0aa8cSTheodore Ts'o } 21718dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 21728dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 21738dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 21748dc0aa8cSTheodore Ts'o return -1; 21758dc0aa8cSTheodore Ts'o } 21768dc0aa8cSTheodore Ts'o 2177ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 21780efb3b23SJan Kara return -1; 217926092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 218026092bf5STheodore Ts'o return -1; 2181c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 2182c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 218326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 21841e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 21851e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 2186c93cf2d7SDmitry Monakhov } else 2187c93cf2d7SDmitry Monakhov return -1; 2188c93cf2d7SDmitry Monakhov } 218926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 219026092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 219126092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 219226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 219326092bf5STheodore Ts'o "options when quota turned on"); 219426092bf5STheodore Ts'o return -1; 219526092bf5STheodore Ts'o } 219626092bf5STheodore Ts'o 219726092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 219826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 219926092bf5STheodore Ts'o } else if (token == Opt_commit) { 220026092bf5STheodore Ts'o if (arg == 0) 220126092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 22029ba55543Szhangyi (F) else if (arg > INT_MAX / HZ) { 22039ba55543Szhangyi (F) ext4_msg(sb, KERN_ERR, 22049ba55543Szhangyi (F) "Invalid commit interval %d, " 22059ba55543Szhangyi (F) "must be smaller than %d", 22069ba55543Szhangyi (F) arg, INT_MAX / HZ); 22079ba55543Szhangyi (F) return -1; 22089ba55543Szhangyi (F) } 220926092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 2210670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 22119803387cSTheodore Ts'o if ((arg & 1) || 22129803387cSTheodore Ts'o (arg < 4) || 22139803387cSTheodore Ts'o (arg > (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { 22149803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 22159803387cSTheodore Ts'o "Invalid want_extra_isize %d", arg); 22169803387cSTheodore Ts'o return -1; 22179803387cSTheodore Ts'o } 2218670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 221926092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 222026092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 222126092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 222226092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 222326092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2224e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 2225e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 2226e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2227e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 222826092bf5STheodore Ts'o return -1; 222926092bf5STheodore Ts'o } 223026092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 223126092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 223226092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 223326092bf5STheodore Ts'o if (!args->from) 223426092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 223526092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 2236df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 2237df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 22388016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 22398016e29fSHarshad Shirwadkar } else if (token == Opt_fc_debug_max_replay) { 22408016e29fSHarshad Shirwadkar sbi->s_fc_debug_max_replay = arg; 22418016e29fSHarshad Shirwadkar #endif 224226092bf5STheodore Ts'o } else if (token == Opt_stripe) { 224326092bf5STheodore Ts'o sbi->s_stripe = arg; 22440efb3b23SJan Kara } else if (token == Opt_resuid) { 22450efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 22460efb3b23SJan Kara if (!uid_valid(uid)) { 22475f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 22480efb3b23SJan Kara return -1; 22490efb3b23SJan Kara } 22500efb3b23SJan Kara sbi->s_resuid = uid; 22510efb3b23SJan Kara } else if (token == Opt_resgid) { 22520efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 22530efb3b23SJan Kara if (!gid_valid(gid)) { 22545f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 22550efb3b23SJan Kara return -1; 22560efb3b23SJan Kara } 22570efb3b23SJan Kara sbi->s_resgid = gid; 22580efb3b23SJan Kara } else if (token == Opt_journal_dev) { 22590efb3b23SJan Kara if (is_remount) { 22600efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 22610efb3b23SJan Kara "Cannot specify journal on remount"); 22620efb3b23SJan Kara return -1; 22630efb3b23SJan Kara } 2264b237e304SHarshad Shirwadkar parsed_opts->journal_devnum = arg; 2265ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2266ad4eec61SEric Sandeen char *journal_path; 2267ad4eec61SEric Sandeen struct inode *journal_inode; 2268ad4eec61SEric Sandeen struct path path; 2269ad4eec61SEric Sandeen int error; 2270ad4eec61SEric Sandeen 2271ad4eec61SEric Sandeen if (is_remount) { 2272ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 2273ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2274ad4eec61SEric Sandeen return -1; 2275ad4eec61SEric Sandeen } 2276ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 2277ad4eec61SEric Sandeen if (!journal_path) { 2278ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 2279ad4eec61SEric Sandeen "journal device string"); 2280ad4eec61SEric Sandeen return -1; 2281ad4eec61SEric Sandeen } 2282ad4eec61SEric Sandeen 2283ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 2284ad4eec61SEric Sandeen if (error) { 2285ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 2286ad4eec61SEric Sandeen "journal device path: error %d", error); 2287ad4eec61SEric Sandeen kfree(journal_path); 2288ad4eec61SEric Sandeen return -1; 2289ad4eec61SEric Sandeen } 2290ad4eec61SEric Sandeen 22912b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2292ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 2293ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 2294ad4eec61SEric Sandeen "is not a block device", journal_path); 2295ad4eec61SEric Sandeen path_put(&path); 2296ad4eec61SEric Sandeen kfree(journal_path); 2297ad4eec61SEric Sandeen return -1; 2298ad4eec61SEric Sandeen } 2299ad4eec61SEric Sandeen 2300b237e304SHarshad Shirwadkar parsed_opts->journal_devnum = new_encode_dev(journal_inode->i_rdev); 2301ad4eec61SEric Sandeen path_put(&path); 2302ad4eec61SEric Sandeen kfree(journal_path); 23030efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 23040efb3b23SJan Kara if (arg > 7) { 23055f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 23060efb3b23SJan Kara " (must be 0-7)"); 23070efb3b23SJan Kara return -1; 23080efb3b23SJan Kara } 2309b237e304SHarshad Shirwadkar parsed_opts->journal_ioprio = 23100efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 23116ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 2312ed318a6cSEric Biggers return ext4_set_test_dummy_encryption(sb, opt, &args[0], 2313ed318a6cSEric Biggers is_remount); 231426092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 231526092bf5STheodore Ts'o if (is_remount) { 231626092bf5STheodore Ts'o if (!sbi->s_journal) 231726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 23185f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 231926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 232026092bf5STheodore Ts'o "Cannot change data mode on remount"); 232126092bf5STheodore Ts'o return -1; 232226092bf5STheodore Ts'o } 232326092bf5STheodore Ts'o } else { 232426092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 232526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 232626092bf5STheodore Ts'o } 232726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 232826092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 232926092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 233026092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 23315f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 23325f3633e3SJan Kara "quota options when quota turned on"); 233326092bf5STheodore Ts'o return -1; 233426092bf5STheodore Ts'o } 2335e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 2336c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 2337c325a67cSTheodore Ts'o "Quota format mount options ignored " 2338262b4662SJan Kara "when QUOTA feature is enabled"); 2339c325a67cSTheodore Ts'o return 1; 2340262b4662SJan Kara } 234126092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 234226092bf5STheodore Ts'o #endif 23439cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 23449cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2345ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 23469cb20f94SIra Weiny switch (token) { 23479cb20f94SIra Weiny case Opt_dax: 23489cb20f94SIra Weiny case Opt_dax_always: 2349829b37b8STheodore Ts'o if (is_remount && 2350829b37b8STheodore Ts'o (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2351829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 2352829b37b8STheodore Ts'o fail_dax_change_remount: 2353829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't change " 2354829b37b8STheodore Ts'o "dax mount option while remounting"); 2355829b37b8STheodore Ts'o return -1; 2356829b37b8STheodore Ts'o } 2357829b37b8STheodore Ts'o if (is_remount && 2358829b37b8STheodore Ts'o (test_opt(sb, DATA_FLAGS) == 2359829b37b8STheodore Ts'o EXT4_MOUNT_JOURNAL_DATA)) { 2360829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 2361829b37b8STheodore Ts'o "both data=journal and dax"); 2362829b37b8STheodore Ts'o return -1; 2363829b37b8STheodore Ts'o } 2364ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 2365ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 23669cb20f94SIra Weiny sbi->s_mount_opt |= EXT4_MOUNT_DAX_ALWAYS; 23679cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 23689cb20f94SIra Weiny break; 23699cb20f94SIra Weiny case Opt_dax_never: 2370829b37b8STheodore Ts'o if (is_remount && 2371829b37b8STheodore Ts'o (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2372829b37b8STheodore Ts'o (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) 2373829b37b8STheodore Ts'o goto fail_dax_change_remount; 23749cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 23759cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 23769cb20f94SIra Weiny break; 23779cb20f94SIra Weiny case Opt_dax_inode: 2378829b37b8STheodore Ts'o if (is_remount && 2379829b37b8STheodore Ts'o ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2380829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2381829b37b8STheodore Ts'o !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) 2382829b37b8STheodore Ts'o goto fail_dax_change_remount; 23839cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 23849cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 23859cb20f94SIra Weiny /* Strictly for printing options */ 23869cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_INODE; 23879cb20f94SIra Weiny break; 23889cb20f94SIra Weiny } 2389ef83b6e8SDan Williams #else 2390923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 23919cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 23929cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 2393923ae0ffSRoss Zwisler return -1; 2394923ae0ffSRoss Zwisler #endif 23957915a861SAles Novak } else if (token == Opt_data_err_abort) { 23967915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 23977915a861SAles Novak } else if (token == Opt_data_err_ignore) { 23987915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 2399196e402aSHarshad Shirwadkar } else if (token == Opt_mb_optimize_scan) { 2400196e402aSHarshad Shirwadkar if (arg != 0 && arg != 1) { 2401196e402aSHarshad Shirwadkar ext4_msg(sb, KERN_WARNING, 2402196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2403196e402aSHarshad Shirwadkar return -1; 2404196e402aSHarshad Shirwadkar } 2405196e402aSHarshad Shirwadkar parsed_opts->mb_optimize_scan = arg; 240626092bf5STheodore Ts'o } else { 240726092bf5STheodore Ts'o if (!args->from) 240826092bf5STheodore Ts'o arg = 1; 240926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 241026092bf5STheodore Ts'o arg = !arg; 241126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 241226092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 241326092bf5STheodore Ts'o "buggy handling of option %s", opt); 241426092bf5STheodore Ts'o WARN_ON(1); 241526092bf5STheodore Ts'o return -1; 241626092bf5STheodore Ts'o } 2417995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2418995a3ed6SHarshad Shirwadkar if (arg != 0) 2419995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 |= m->mount_opt; 2420995a3ed6SHarshad Shirwadkar else 2421995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 &= ~m->mount_opt; 2422995a3ed6SHarshad Shirwadkar } else { 242326092bf5STheodore Ts'o if (arg != 0) 242426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 242526092bf5STheodore Ts'o else 242626092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 242726092bf5STheodore Ts'o } 2428995a3ed6SHarshad Shirwadkar } 242926092bf5STheodore Ts'o return 1; 243026092bf5STheodore Ts'o } 243126092bf5STheodore Ts'o 2432ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 2433b237e304SHarshad Shirwadkar struct ext4_parsed_options *ret_opts, 2434661aa520SEric Sandeen int is_remount) 2435ac27a0ecSDave Kleikamp { 24361e1a76edSOlof Johansson struct ext4_sb_info __maybe_unused *sbi = EXT4_SB(sb); 243733458eabSTheodore Ts'o char *p, __maybe_unused *usr_qf_name, __maybe_unused *grp_qf_name; 2438ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 243926092bf5STheodore Ts'o int token; 2440ac27a0ecSDave Kleikamp 2441ac27a0ecSDave Kleikamp if (!options) 2442ac27a0ecSDave Kleikamp return 1; 2443ac27a0ecSDave Kleikamp 2444ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 2445ac27a0ecSDave Kleikamp if (!*p) 2446ac27a0ecSDave Kleikamp continue; 244715121c18SEric Sandeen /* 244815121c18SEric Sandeen * Initialize args struct so we know whether arg was 244915121c18SEric Sandeen * found; some options take optional arguments. 245015121c18SEric Sandeen */ 2451caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 2452ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 2453b237e304SHarshad Shirwadkar if (handle_mount_opt(sb, p, token, args, ret_opts, 2454b237e304SHarshad Shirwadkar is_remount) < 0) 2455ac27a0ecSDave Kleikamp return 0; 2456ac27a0ecSDave Kleikamp } 2457ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 245849da9392SJan Kara /* 245949da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 246049da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 246149da9392SJan Kara * to support legacy quotas in quota files. 246249da9392SJan Kara */ 246349da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 246449da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 246549da9392SJan Kara "Cannot enable project quota enforcement."); 246649da9392SJan Kara return 0; 246749da9392SJan Kara } 246833458eabSTheodore Ts'o usr_qf_name = get_qf_name(sb, sbi, USRQUOTA); 246933458eabSTheodore Ts'o grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA); 247033458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 247133458eabSTheodore Ts'o if (test_opt(sb, USRQUOTA) && usr_qf_name) 2472fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 2473ac27a0ecSDave Kleikamp 247433458eabSTheodore Ts'o if (test_opt(sb, GRPQUOTA) && grp_qf_name) 2475fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2476ac27a0ecSDave Kleikamp 247756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2478b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 2479b31e1552SEric Sandeen "format mixing"); 2480ac27a0ecSDave Kleikamp return 0; 2481ac27a0ecSDave Kleikamp } 2482ac27a0ecSDave Kleikamp 2483ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2484b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 2485b31e1552SEric Sandeen "not specified"); 2486ac27a0ecSDave Kleikamp return 0; 2487ac27a0ecSDave Kleikamp } 2488ac27a0ecSDave Kleikamp } 2489ac27a0ecSDave Kleikamp #endif 2490626b035bSRitesh Harjani if (test_opt(sb, DIOREAD_NOLOCK)) { 2491626b035bSRitesh Harjani int blocksize = 2492626b035bSRitesh Harjani BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2493626b035bSRitesh Harjani if (blocksize < PAGE_SIZE) 2494626b035bSRitesh Harjani ext4_msg(sb, KERN_WARNING, "Warning: mounting with an " 2495626b035bSRitesh Harjani "experimental mount option 'dioread_nolock' " 2496626b035bSRitesh Harjani "for blocksize < PAGE_SIZE"); 2497626b035bSRitesh Harjani } 2498ac27a0ecSDave Kleikamp return 1; 2499ac27a0ecSDave Kleikamp } 2500ac27a0ecSDave Kleikamp 25012adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 25022adf6da8STheodore Ts'o struct super_block *sb) 25032adf6da8STheodore Ts'o { 25042adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 25052adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 250633458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 25072adf6da8STheodore Ts'o 25082adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 25092adf6da8STheodore Ts'o char *fmtname = ""; 25102adf6da8STheodore Ts'o 25112adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 25122adf6da8STheodore Ts'o case QFMT_VFS_OLD: 25132adf6da8STheodore Ts'o fmtname = "vfsold"; 25142adf6da8STheodore Ts'o break; 25152adf6da8STheodore Ts'o case QFMT_VFS_V0: 25162adf6da8STheodore Ts'o fmtname = "vfsv0"; 25172adf6da8STheodore Ts'o break; 25182adf6da8STheodore Ts'o case QFMT_VFS_V1: 25192adf6da8STheodore Ts'o fmtname = "vfsv1"; 25202adf6da8STheodore Ts'o break; 25212adf6da8STheodore Ts'o } 25222adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 25232adf6da8STheodore Ts'o } 25242adf6da8STheodore Ts'o 252533458eabSTheodore Ts'o rcu_read_lock(); 252633458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 252733458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 252833458eabSTheodore Ts'o if (usr_qf_name) 252933458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 253033458eabSTheodore Ts'o if (grp_qf_name) 253133458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 253233458eabSTheodore Ts'o rcu_read_unlock(); 25332adf6da8STheodore Ts'o #endif 25342adf6da8STheodore Ts'o } 25352adf6da8STheodore Ts'o 25365a916be1STheodore Ts'o static const char *token2str(int token) 25375a916be1STheodore Ts'o { 253850df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 25395a916be1STheodore Ts'o 25405a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 25415a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 25425a916be1STheodore Ts'o break; 25435a916be1STheodore Ts'o return t->pattern; 25445a916be1STheodore Ts'o } 25455a916be1STheodore Ts'o 25462adf6da8STheodore Ts'o /* 25472adf6da8STheodore Ts'o * Show an option if 25482adf6da8STheodore Ts'o * - it's set to a non-default value OR 25492adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 25502adf6da8STheodore Ts'o */ 255166acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 255266acdcf4STheodore Ts'o int nodefs) 25532adf6da8STheodore Ts'o { 25542adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 25552adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 255668afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 25575a916be1STheodore Ts'o const struct mount_opts *m; 255866acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 25592adf6da8STheodore Ts'o 256066acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 256166acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 25622adf6da8STheodore Ts'o 25632adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 25645a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 25655a916be1STheodore Ts'o 25665a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 25675a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 25685a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 25699cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 25705a916be1STheodore Ts'o continue; 257168afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 25725a916be1STheodore Ts'o continue; /* skip if same as the default */ 25735a916be1STheodore Ts'o if ((want_set && 25745a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 25755a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 25765a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 25775a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 25785a916be1STheodore Ts'o } 25795a916be1STheodore Ts'o 258008cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 25815a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 258208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 258308cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 258408cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 25855a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 258608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 258708cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 258866acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 25895a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 25905a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 25912adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 25925a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 25932adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 25945a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 259566acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 25965a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 259766acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 25985a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 259966acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 26005a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2601357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 26025a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 260366acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 26045a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 260568afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 260668afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 26072adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 26085a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 26092adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 26105a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 26112adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 26125a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 26135a916be1STheodore Ts'o } 261466acdcf4STheodore Ts'o if (nodefs || 261566acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 26165a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 26172adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 26182adf6da8STheodore Ts'o 2619ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 262066acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 26215a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2622df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2623df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 26247915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 26257915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2626ed318a6cSEric Biggers 2627ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 26282adf6da8STheodore Ts'o 26294f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 26304f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 26314f74d15fSEric Biggers 26329cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 26339cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 26349cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 26359cb20f94SIra Weiny else 26369cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 26379cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 26389cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 26399cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 26409cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 26419cb20f94SIra Weiny } 26422adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 26432adf6da8STheodore Ts'o return 0; 26442adf6da8STheodore Ts'o } 26452adf6da8STheodore Ts'o 264666acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 264766acdcf4STheodore Ts'o { 264866acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 264966acdcf4STheodore Ts'o } 265066acdcf4STheodore Ts'o 2651ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 265266acdcf4STheodore Ts'o { 265366acdcf4STheodore Ts'o struct super_block *sb = seq->private; 265466acdcf4STheodore Ts'o int rc; 265566acdcf4STheodore Ts'o 2656bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 265766acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 265866acdcf4STheodore Ts'o seq_puts(seq, "\n"); 265966acdcf4STheodore Ts'o return rc; 266066acdcf4STheodore Ts'o } 266166acdcf4STheodore Ts'o 2662617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2663ac27a0ecSDave Kleikamp int read_only) 2664ac27a0ecSDave Kleikamp { 2665617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2666c89128a0SJaegeuk Kim int err = 0; 2667ac27a0ecSDave Kleikamp 2668617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2669b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2670b31e1552SEric Sandeen "forcing read-only mode"); 2671c89128a0SJaegeuk Kim err = -EROFS; 26725adaccacSyangerkun goto done; 2673ac27a0ecSDave Kleikamp } 2674ac27a0ecSDave Kleikamp if (read_only) 2675281b5995STheodore Ts'o goto done; 2676617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2677b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2678b31e1552SEric Sandeen "running e2fsck is recommended"); 2679c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2680b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2681b31e1552SEric Sandeen "warning: mounting fs with errors, " 2682b31e1552SEric Sandeen "running e2fsck is recommended"); 2683ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2684ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2685ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2686b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2687b31e1552SEric Sandeen "warning: maximal mount count reached, " 2688b31e1552SEric Sandeen "running e2fsck is recommended"); 2689ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 26906a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 26916a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2692b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2693b31e1552SEric Sandeen "warning: checktime reached, " 2694b31e1552SEric Sandeen "running e2fsck is recommended"); 26950390131bSFrank Mayhar if (!sbi->s_journal) 2696216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2697ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2698617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2699e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 27006a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 27010390131bSFrank Mayhar if (sbi->s_journal) 2702e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2703ac27a0ecSDave Kleikamp 27044392fbc4SJan Kara err = ext4_commit_super(sb); 2705281b5995STheodore Ts'o done: 2706ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2707a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2708a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2709ac27a0ecSDave Kleikamp sb->s_blocksize, 2710ac27a0ecSDave Kleikamp sbi->s_groups_count, 2711617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2712617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2713a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2714ac27a0ecSDave Kleikamp 27157abc52c2SDan Magenheimer cleancache_init_fs(sb); 2716c89128a0SJaegeuk Kim return err; 2717ac27a0ecSDave Kleikamp } 2718ac27a0ecSDave Kleikamp 2719117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2720117fff10STheodore Ts'o { 2721117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 27227c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 272337b0b6b8SDan Carpenter int size, i, j; 2724117fff10STheodore Ts'o 2725117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2726117fff10STheodore Ts'o return 0; 2727117fff10STheodore Ts'o 2728117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2729117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2730117fff10STheodore Ts'o return 0; 2731117fff10STheodore Ts'o 27327c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 27337c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 2734117fff10STheodore Ts'o if (!new_groups) { 27357c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 27367c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 2737117fff10STheodore Ts'o return -ENOMEM; 2738117fff10STheodore Ts'o } 27397c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 27407c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 27417c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 27427c990728SSuraj Jitindar Singh GFP_KERNEL); 27437c990728SSuraj Jitindar Singh if (!new_groups[i]) { 274437b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 274537b0b6b8SDan Carpenter kvfree(new_groups[j]); 27467c990728SSuraj Jitindar Singh kvfree(new_groups); 27477c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 27487c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 27497c990728SSuraj Jitindar Singh return -ENOMEM; 2750117fff10STheodore Ts'o } 27517c990728SSuraj Jitindar Singh } 27527c990728SSuraj Jitindar Singh rcu_read_lock(); 27537c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 27547c990728SSuraj Jitindar Singh if (old_groups) 27557c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 27567c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 27577c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 27587c990728SSuraj Jitindar Singh rcu_read_unlock(); 27597c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 27607c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 27617c990728SSuraj Jitindar Singh if (old_groups) 27627c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 2763117fff10STheodore Ts'o return 0; 2764117fff10STheodore Ts'o } 2765117fff10STheodore Ts'o 2766772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2767772cb7c8SJose R. Santos { 2768772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2769772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 27707c990728SSuraj Jitindar Singh struct flex_groups *fg; 2771772cb7c8SJose R. Santos ext4_group_t flex_group; 2772117fff10STheodore Ts'o int i, err; 2773772cb7c8SJose R. Santos 2774503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2775d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2776772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2777772cb7c8SJose R. Santos return 1; 2778772cb7c8SJose R. Santos } 2779772cb7c8SJose R. Santos 2780117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2781117fff10STheodore Ts'o if (err) 2782772cb7c8SJose R. Santos goto failed; 2783772cb7c8SJose R. Santos 2784772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 278588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2786772cb7c8SJose R. Santos 2787772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 27887c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 27897c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 279090ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 27917c990728SSuraj Jitindar Singh &fg->free_clusters); 27927c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 2793772cb7c8SJose R. Santos } 2794772cb7c8SJose R. Santos 2795772cb7c8SJose R. Santos return 1; 2796772cb7c8SJose R. Santos failed: 2797772cb7c8SJose R. Santos return 0; 2798772cb7c8SJose R. Santos } 2799772cb7c8SJose R. Santos 2800e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2801717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2802717d50e4SAndreas Dilger { 2803b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2804717d50e4SAndreas Dilger __u16 crc = 0; 2805717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2806e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2807717d50e4SAndreas Dilger 28089aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2809feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2810feb0ab32SDarrick J. Wong __u32 csum32; 2811b47820edSDaeho Jeong __u16 dummy_csum = 0; 2812feb0ab32SDarrick J. Wong 2813feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2814feb0ab32SDarrick J. Wong sizeof(le_group)); 2815b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2816b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2817b47820edSDaeho Jeong sizeof(dummy_csum)); 2818b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2819b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2820b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2821b47820edSDaeho Jeong sbi->s_desc_size - offset); 2822feb0ab32SDarrick J. Wong 2823feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2824feb0ab32SDarrick J. Wong goto out; 2825feb0ab32SDarrick J. Wong } 2826feb0ab32SDarrick J. Wong 2827feb0ab32SDarrick J. Wong /* old crc16 code */ 2828e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2829813d32f9SDarrick J. Wong return 0; 2830813d32f9SDarrick J. Wong 2831717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2832717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2833717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2834717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2835717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2836e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2837717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2838717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2839717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2840717d50e4SAndreas Dilger offset); 2841717d50e4SAndreas Dilger 2842feb0ab32SDarrick J. Wong out: 2843717d50e4SAndreas Dilger return cpu_to_le16(crc); 2844717d50e4SAndreas Dilger } 2845717d50e4SAndreas Dilger 2846feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2847717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2848717d50e4SAndreas Dilger { 2849feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2850e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2851717d50e4SAndreas Dilger return 0; 2852717d50e4SAndreas Dilger 2853717d50e4SAndreas Dilger return 1; 2854717d50e4SAndreas Dilger } 2855717d50e4SAndreas Dilger 2856feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2857feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2858feb0ab32SDarrick J. Wong { 2859feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2860feb0ab32SDarrick J. Wong return; 2861e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2862feb0ab32SDarrick J. Wong } 2863feb0ab32SDarrick J. Wong 2864ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2865bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2866829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2867bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2868ac27a0ecSDave Kleikamp { 2869617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2870617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2871617ba13bSMingming Cao ext4_fsblk_t last_block; 287244de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 2873bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2874bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2875bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2876ce421581SJose R. Santos int flexbg_flag = 0; 2877bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2878ac27a0ecSDave Kleikamp 2879e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2880ce421581SJose R. Santos flexbg_flag = 1; 2881ce421581SJose R. Santos 2882617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2883ac27a0ecSDave Kleikamp 2884197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2885197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2886197cd65aSAkinobu Mita 2887ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2888bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2889ac27a0ecSDave Kleikamp else 2890ac27a0ecSDave Kleikamp last_block = first_block + 2891617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2892ac27a0ecSDave Kleikamp 2893bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2894bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2895bfff6873SLukas Czerner grp = i; 2896bfff6873SLukas Czerner 28978fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2898829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2899829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2900829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2901829fa70dSTheodore Ts'o "superblock", i); 290218db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 290318db4b4eSTheodore Ts'o return 0; 2904829fa70dSTheodore Ts'o } 290577260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 290677260807STheodore Ts'o block_bitmap <= last_bg_block) { 290777260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 290877260807STheodore Ts'o "Block bitmap for group %u overlaps " 290977260807STheodore Ts'o "block group descriptors", i); 291077260807STheodore Ts'o if (!sb_rdonly(sb)) 291177260807STheodore Ts'o return 0; 291277260807STheodore Ts'o } 29132b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2914b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2915a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2916b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2917ac27a0ecSDave Kleikamp return 0; 2918ac27a0ecSDave Kleikamp } 29198fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2920829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2921829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2922829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2923829fa70dSTheodore Ts'o "superblock", i); 292418db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 292518db4b4eSTheodore Ts'o return 0; 2926829fa70dSTheodore Ts'o } 292777260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 292877260807STheodore Ts'o inode_bitmap <= last_bg_block) { 292977260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 293077260807STheodore Ts'o "Inode bitmap for group %u overlaps " 293177260807STheodore Ts'o "block group descriptors", i); 293277260807STheodore Ts'o if (!sb_rdonly(sb)) 293377260807STheodore Ts'o return 0; 293477260807STheodore Ts'o } 29352b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2936b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2937a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2938b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2939ac27a0ecSDave Kleikamp return 0; 2940ac27a0ecSDave Kleikamp } 29418fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2942829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2943829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2944829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2945829fa70dSTheodore Ts'o "superblock", i); 294618db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 294718db4b4eSTheodore Ts'o return 0; 2948829fa70dSTheodore Ts'o } 294977260807STheodore Ts'o if (inode_table >= sb_block + 1 && 295077260807STheodore Ts'o inode_table <= last_bg_block) { 295177260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 295277260807STheodore Ts'o "Inode table for group %u overlaps " 295377260807STheodore Ts'o "block group descriptors", i); 295477260807STheodore Ts'o if (!sb_rdonly(sb)) 295577260807STheodore Ts'o return 0; 295677260807STheodore Ts'o } 2957bd81d8eeSLaurent Vivier if (inode_table < first_block || 29582b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2959b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2960a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2961b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2962ac27a0ecSDave Kleikamp return 0; 2963ac27a0ecSDave Kleikamp } 2964955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2965feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2966b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2967b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2968e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2969fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2970bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2971955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2972717d50e4SAndreas Dilger return 0; 2973717d50e4SAndreas Dilger } 29747ee1ec4cSLi Zefan } 2975955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2976ce421581SJose R. Santos if (!flexbg_flag) 2977617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2978ac27a0ecSDave Kleikamp } 2979bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2980bfff6873SLukas Czerner *first_not_zeroed = grp; 2981ac27a0ecSDave Kleikamp return 1; 2982ac27a0ecSDave Kleikamp } 2983ac27a0ecSDave Kleikamp 2984617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2985ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2986ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2987ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2988ac27a0ecSDave Kleikamp * 2989ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2990ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2991ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2992ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2993ac27a0ecSDave Kleikamp * 2994ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2995ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2996ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2997617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2998ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2999ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 3000ac27a0ecSDave Kleikamp */ 3001617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 3002617ba13bSMingming Cao struct ext4_super_block *es) 3003ac27a0ecSDave Kleikamp { 3004ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 30052c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 3006ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 300795f1fda4Szhangyi (F) int quota_update = 0; 3008ac27a0ecSDave Kleikamp int i; 3009ac27a0ecSDave Kleikamp #endif 3010ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 3011ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 3012ac27a0ecSDave Kleikamp return; 3013ac27a0ecSDave Kleikamp } 3014ac27a0ecSDave Kleikamp 3015a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 3016b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3017b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 3018a8f48a95SEric Sandeen return; 3019a8f48a95SEric Sandeen } 3020a8f48a95SEric Sandeen 3021d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 3022d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 3023d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 3024d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 3025d39195c3SAmir Goldstein return; 3026d39195c3SAmir Goldstein } 3027d39195c3SAmir Goldstein 3028617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 3029c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 30301751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 303184474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 3032ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 3033ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 3034c25f9bc6SEric Sandeen } 3035ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 3036ac27a0ecSDave Kleikamp return; 3037ac27a0ecSDave Kleikamp } 3038ac27a0ecSDave Kleikamp 30391751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 3040b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 30411751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 3042ac27a0ecSDave Kleikamp } 3043ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 304495f1fda4Szhangyi (F) /* 304595f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 304695f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 304795f1fda4Szhangyi (F) */ 30481751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 304995f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 305095f1fda4Szhangyi (F) 305195f1fda4Szhangyi (F) if (!ret) 305295f1fda4Szhangyi (F) quota_update = 1; 305395f1fda4Szhangyi (F) else 305495f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 305595f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 305695f1fda4Szhangyi (F) } 305795f1fda4Szhangyi (F) 305895f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 3059a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 3060617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 3061617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 306295f1fda4Szhangyi (F) 306395f1fda4Szhangyi (F) if (!ret) 306495f1fda4Szhangyi (F) quota_update = 1; 306595f1fda4Szhangyi (F) else 3066b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3067b31e1552SEric Sandeen "Cannot turn on journaled " 306895f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 3069ac27a0ecSDave Kleikamp } 3070ac27a0ecSDave Kleikamp } 3071ac27a0ecSDave Kleikamp #endif 3072ac27a0ecSDave Kleikamp 3073ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 3074ac27a0ecSDave Kleikamp struct inode *inode; 3075ac27a0ecSDave Kleikamp 3076c65d5c6cSVegard Nossum /* 3077c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 3078c65d5c6cSVegard Nossum * so, skip the rest. 3079c65d5c6cSVegard Nossum */ 3080c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 3081c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 3082c65d5c6cSVegard Nossum es->s_last_orphan = 0; 3083c65d5c6cSVegard Nossum break; 3084c65d5c6cSVegard Nossum } 3085c65d5c6cSVegard Nossum 308697bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 308797bd42b9SJosef Bacik if (IS_ERR(inode)) { 3088ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 3089ac27a0ecSDave Kleikamp break; 3090ac27a0ecSDave Kleikamp } 3091ac27a0ecSDave Kleikamp 3092617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 3093871a2931SChristoph Hellwig dquot_initialize(inode); 3094ac27a0ecSDave Kleikamp if (inode->i_nlink) { 3095566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 3096b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 3097b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 309846e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 3099e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 3100ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 31015955102cSAl Viro inode_lock(inode); 310255f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 31032c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 31042c98eb5eSTheodore Ts'o if (ret) 31052c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 31065955102cSAl Viro inode_unlock(inode); 3107ac27a0ecSDave Kleikamp nr_truncates++; 3108ac27a0ecSDave Kleikamp } else { 3109566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 3110b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 3111b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 311246e665e9SHarvey Harrison __func__, inode->i_ino); 3113ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 3114ac27a0ecSDave Kleikamp inode->i_ino); 3115ac27a0ecSDave Kleikamp nr_orphans++; 3116ac27a0ecSDave Kleikamp } 3117ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 3118ac27a0ecSDave Kleikamp } 3119ac27a0ecSDave Kleikamp 3120ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 3121ac27a0ecSDave Kleikamp 3122ac27a0ecSDave Kleikamp if (nr_orphans) 3123b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 3124b31e1552SEric Sandeen PLURAL(nr_orphans)); 3125ac27a0ecSDave Kleikamp if (nr_truncates) 3126b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 3127b31e1552SEric Sandeen PLURAL(nr_truncates)); 3128ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 312995f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 313095f1fda4Szhangyi (F) if (quota_update) { 3131a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 313295f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 3133287a8095SChristoph Hellwig dquot_quota_off(sb, i); 3134ac27a0ecSDave Kleikamp } 313595f1fda4Szhangyi (F) } 3136ac27a0ecSDave Kleikamp #endif 31371751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 3138ac27a0ecSDave Kleikamp } 31390b8e58a1SAndreas Dilger 3140cd2291a4SEric Sandeen /* 3141cd2291a4SEric Sandeen * Maximal extent format file size. 3142cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3143cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3144cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3145cd2291a4SEric Sandeen * so that won't be a limiting factor. 3146cd2291a4SEric Sandeen * 3147f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3148f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3149f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3150f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3151f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3152f17722f9SLukas Czerner * 3153cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3154cd2291a4SEric Sandeen */ 3155f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3156cd2291a4SEric Sandeen { 3157cd2291a4SEric Sandeen loff_t res; 3158cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3159cd2291a4SEric Sandeen 316072deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 316172deb455SChristoph Hellwig 316272deb455SChristoph Hellwig if (!has_huge_files) { 3163cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3164cd2291a4SEric Sandeen 3165cd2291a4SEric Sandeen /* total blocks in file system block size */ 3166cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3167cd2291a4SEric Sandeen upper_limit <<= blkbits; 3168cd2291a4SEric Sandeen } 3169cd2291a4SEric Sandeen 3170f17722f9SLukas Czerner /* 3171f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3172f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3173f17722f9SLukas Czerner * size 3174f17722f9SLukas Czerner */ 3175f17722f9SLukas Czerner res = (1LL << 32) - 1; 3176cd2291a4SEric Sandeen res <<= blkbits; 3177cd2291a4SEric Sandeen 3178cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3179cd2291a4SEric Sandeen if (res > upper_limit) 3180cd2291a4SEric Sandeen res = upper_limit; 3181cd2291a4SEric Sandeen 3182cd2291a4SEric Sandeen return res; 3183cd2291a4SEric Sandeen } 3184ac27a0ecSDave Kleikamp 3185ac27a0ecSDave Kleikamp /* 3186cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 31870fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 31880fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3189ac27a0ecSDave Kleikamp */ 3190f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3191ac27a0ecSDave Kleikamp { 3192617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 31930fc1b451SAneesh Kumar K.V int meta_blocks; 31940fc1b451SAneesh Kumar K.V loff_t upper_limit; 31950b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 31960b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 31970b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 31980b8e58a1SAndreas Dilger * 31990b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 32000b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 32010fc1b451SAneesh Kumar K.V */ 32020fc1b451SAneesh Kumar K.V 320372deb455SChristoph Hellwig if (!has_huge_files) { 32040fc1b451SAneesh Kumar K.V /* 320572deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 320672deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 320772deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 32080fc1b451SAneesh Kumar K.V */ 32090fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 32100fc1b451SAneesh Kumar K.V 32110fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 32120fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 32130fc1b451SAneesh Kumar K.V 32140fc1b451SAneesh Kumar K.V } else { 32158180a562SAneesh Kumar K.V /* 32168180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 32178180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 32188180a562SAneesh Kumar K.V * represent total number of blocks in 32198180a562SAneesh Kumar K.V * file system block size 32208180a562SAneesh Kumar K.V */ 32210fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 32220fc1b451SAneesh Kumar K.V 32230fc1b451SAneesh Kumar K.V } 32240fc1b451SAneesh Kumar K.V 32250fc1b451SAneesh Kumar K.V /* indirect blocks */ 32260fc1b451SAneesh Kumar K.V meta_blocks = 1; 32270fc1b451SAneesh Kumar K.V /* double indirect blocks */ 32280fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 32290fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 32300fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 32310fc1b451SAneesh Kumar K.V 32320fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 32330fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3234ac27a0ecSDave Kleikamp 3235ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3236ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3237ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3238ac27a0ecSDave Kleikamp res <<= bits; 3239ac27a0ecSDave Kleikamp if (res > upper_limit) 3240ac27a0ecSDave Kleikamp res = upper_limit; 32410fc1b451SAneesh Kumar K.V 32420fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 32430fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 32440fc1b451SAneesh Kumar K.V 3245ac27a0ecSDave Kleikamp return res; 3246ac27a0ecSDave Kleikamp } 3247ac27a0ecSDave Kleikamp 3248617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 324970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3250ac27a0ecSDave Kleikamp { 3251617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3252fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3253ac27a0ecSDave Kleikamp int has_super = 0; 3254ac27a0ecSDave Kleikamp 3255ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3256ac27a0ecSDave Kleikamp 3257e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 325870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3259ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3260617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3261ac27a0ecSDave Kleikamp has_super = 1; 32620b8e58a1SAndreas Dilger 3263bd63f6b0SDarrick J. Wong /* 3264bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3265bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3266bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3267bd63f6b0SDarrick J. Wong * compensate. 3268bd63f6b0SDarrick J. Wong */ 3269bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 327049598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3271bd63f6b0SDarrick J. Wong has_super++; 3272bd63f6b0SDarrick J. Wong 3273617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3274ac27a0ecSDave Kleikamp } 3275ac27a0ecSDave Kleikamp 3276c9de560dSAlex Tomas /** 3277c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3278c9de560dSAlex Tomas * @sbi: In memory super block info 3279c9de560dSAlex Tomas * 3280c9de560dSAlex Tomas * If we have specified it via mount option, then 3281c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3282c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3283c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3284c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3285c9de560dSAlex Tomas * 3286c9de560dSAlex Tomas */ 3287c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3288c9de560dSAlex Tomas { 3289c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3290c9de560dSAlex Tomas unsigned long stripe_width = 3291c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 32923eb08658SDan Ehrenberg int ret; 3293c9de560dSAlex Tomas 3294c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 32953eb08658SDan Ehrenberg ret = sbi->s_stripe; 32965469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 32973eb08658SDan Ehrenberg ret = stripe_width; 32985469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 32993eb08658SDan Ehrenberg ret = stride; 33003eb08658SDan Ehrenberg else 33013eb08658SDan Ehrenberg ret = 0; 3302c9de560dSAlex Tomas 33033eb08658SDan Ehrenberg /* 33043eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 33053eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 33063eb08658SDan Ehrenberg */ 33073eb08658SDan Ehrenberg if (ret <= 1) 33083eb08658SDan Ehrenberg ret = 0; 3309c9de560dSAlex Tomas 33103eb08658SDan Ehrenberg return ret; 3311c9de560dSAlex Tomas } 3312ac27a0ecSDave Kleikamp 3313a13fb1a4SEric Sandeen /* 3314a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3315a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3316a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3317a13fb1a4SEric Sandeen * 0 if it cannot be. 3318a13fb1a4SEric Sandeen */ 3319a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 3320a13fb1a4SEric Sandeen { 3321e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3322a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3323a13fb1a4SEric Sandeen "Couldn't mount because of " 3324a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3325a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3326a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3327a13fb1a4SEric Sandeen return 0; 3328a13fb1a4SEric Sandeen } 3329a13fb1a4SEric Sandeen 3330c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3331c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3332c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3333c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3334c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3335c83ad55eSGabriel Krisman Bertazi return 0; 3336c83ad55eSGabriel Krisman Bertazi } 3337c83ad55eSGabriel Krisman Bertazi #endif 3338c83ad55eSGabriel Krisman Bertazi 3339a13fb1a4SEric Sandeen if (readonly) 3340a13fb1a4SEric Sandeen return 1; 3341a13fb1a4SEric Sandeen 3342e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 33432cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 33441751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 33452cb5cc8bSDarrick J. Wong return 1; 33462cb5cc8bSDarrick J. Wong } 33472cb5cc8bSDarrick J. Wong 3348a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3349e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3350a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3351a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3352a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3353a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3354a13fb1a4SEric Sandeen return 0; 3355a13fb1a4SEric Sandeen } 3356e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3357bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3358bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3359bab08ab9STheodore Ts'o "extents feature\n"); 3360bab08ab9STheodore Ts'o return 0; 3361bab08ab9STheodore Ts'o } 33627c319d32SAditya Kali 33639db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3364d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3365d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 33667c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3367d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3368689c958cSLi Xi return 0; 3369689c958cSLi Xi } 33707c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3371a13fb1a4SEric Sandeen return 1; 3372a13fb1a4SEric Sandeen } 3373a13fb1a4SEric Sandeen 337466e61a9eSTheodore Ts'o /* 337566e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 337666e61a9eSTheodore Ts'o * on the file system 337766e61a9eSTheodore Ts'o */ 3378235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 337966e61a9eSTheodore Ts'o { 3380235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3381235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3382235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 338366e61a9eSTheodore Ts'o 338466e61a9eSTheodore Ts'o if (es->s_error_count) 3385ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3386ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 338766e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 338866e61a9eSTheodore Ts'o if (es->s_first_error_time) { 33896a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 33906a0678a7SArnd Bergmann sb->s_id, 33916a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 339266e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 339366e61a9eSTheodore Ts'o es->s_first_error_func, 339466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 339566e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3396651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 339766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 339866e61a9eSTheodore Ts'o if (es->s_first_error_block) 3399651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 340066e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3401651e1c3bSJoe Perches printk(KERN_CONT "\n"); 340266e61a9eSTheodore Ts'o } 340366e61a9eSTheodore Ts'o if (es->s_last_error_time) { 34046a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 34056a0678a7SArnd Bergmann sb->s_id, 34066a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 340766e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 340866e61a9eSTheodore Ts'o es->s_last_error_func, 340966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 341066e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3411651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 341266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 341366e61a9eSTheodore Ts'o if (es->s_last_error_block) 3414651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 341566e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3416651e1c3bSJoe Perches printk(KERN_CONT "\n"); 341766e61a9eSTheodore Ts'o } 341866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 341966e61a9eSTheodore Ts'o } 342066e61a9eSTheodore Ts'o 3421bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3422bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3423bfff6873SLukas Czerner { 3424bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 34253d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 34263d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 34273d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 3428bfff6873SLukas Czerner unsigned long timeout = 0; 34293d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3430bfff6873SLukas Czerner int ret = 0; 3431bfff6873SLukas Czerner 34323d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 34333d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 34343d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 34353d392b26STheodore Ts'o if (prefetch_ios) 34363d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 34373d392b26STheodore Ts'o prefetch_ios); 34383d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 34393d392b26STheodore Ts'o prefetch_ios); 34403d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 34413d392b26STheodore Ts'o ret = 1; 34423d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 34433d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 34443d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 34453d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 34463d392b26STheodore Ts'o ret = 0; 34473d392b26STheodore Ts'o } 34483d392b26STheodore Ts'o } 34493d392b26STheodore Ts'o return ret; 34503d392b26STheodore Ts'o } 3451bfff6873SLukas Czerner 34523d392b26STheodore Ts'o for (; group < ngroups; group++) { 3453bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3454bfff6873SLukas Czerner if (!gdp) { 3455bfff6873SLukas Czerner ret = 1; 3456bfff6873SLukas Czerner break; 3457bfff6873SLukas Czerner } 3458bfff6873SLukas Czerner 3459bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3460bfff6873SLukas Czerner break; 3461bfff6873SLukas Czerner } 3462bfff6873SLukas Czerner 34637f511862STheodore Ts'o if (group >= ngroups) 3464bfff6873SLukas Czerner ret = 1; 3465bfff6873SLukas Czerner 3466bfff6873SLukas Czerner if (!ret) { 3467bfff6873SLukas Czerner timeout = jiffies; 3468bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3469bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 34703d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3471bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 347251ce6511SLukas Czerner timeout = (jiffies - timeout) * 34733d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_wait_mult; 3474bfff6873SLukas Czerner elr->lr_timeout = timeout; 3475bfff6873SLukas Czerner } 3476bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3477bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3478bfff6873SLukas Czerner } 3479bfff6873SLukas Czerner return ret; 3480bfff6873SLukas Czerner } 3481bfff6873SLukas Czerner 3482bfff6873SLukas Czerner /* 3483bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 34844ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3485bfff6873SLukas Czerner */ 3486bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3487bfff6873SLukas Czerner { 3488bfff6873SLukas Czerner if (!elr) 3489bfff6873SLukas Czerner return; 3490bfff6873SLukas Czerner 3491bfff6873SLukas Czerner list_del(&elr->lr_request); 34923d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3493bfff6873SLukas Czerner kfree(elr); 3494bfff6873SLukas Czerner } 3495bfff6873SLukas Czerner 3496bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3497bfff6873SLukas Czerner { 34981bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 34991bb933fbSLukas Czerner if (!ext4_li_info) { 35001bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3501bfff6873SLukas Czerner return; 35021bb933fbSLukas Czerner } 3503bfff6873SLukas Czerner 3504bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 35051bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3506bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 35071bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3508bfff6873SLukas Czerner } 3509bfff6873SLukas Czerner 35108f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 35118f1f7453SEric Sandeen 3512bfff6873SLukas Czerner /* 3513bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3514bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3515bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3516bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3517bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3518bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3519bfff6873SLukas Czerner * next waking time and put itself into sleep. 3520bfff6873SLukas Czerner */ 3521bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3522bfff6873SLukas Czerner { 3523bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3524bfff6873SLukas Czerner struct list_head *pos, *n; 3525bfff6873SLukas Czerner struct ext4_li_request *elr; 35264ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3527bfff6873SLukas Czerner 3528bfff6873SLukas Czerner BUG_ON(NULL == eli); 3529bfff6873SLukas Czerner 3530bfff6873SLukas Czerner cont_thread: 3531bfff6873SLukas Czerner while (true) { 3532bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3533bfff6873SLukas Czerner 3534bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3535bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3536bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3537bfff6873SLukas Czerner goto exit_thread; 3538bfff6873SLukas Czerner } 3539bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3540e22834f0SDmitry Monakhov int err = 0; 3541e22834f0SDmitry Monakhov int progress = 0; 3542bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3543bfff6873SLukas Czerner lr_request); 3544bfff6873SLukas Czerner 3545e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3546e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3547e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3548e22834f0SDmitry Monakhov continue; 3549e22834f0SDmitry Monakhov } 3550e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3551e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3552e22834f0SDmitry Monakhov progress = 1; 3553e22834f0SDmitry Monakhov /* 3554e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3555e22834f0SDmitry Monakhov * be removed from the list, it is 3556e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3557e22834f0SDmitry Monakhov */ 3558e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3559e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3560e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3561e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3562e22834f0SDmitry Monakhov n = pos->next; 3563e22834f0SDmitry Monakhov } 3564e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3565e22834f0SDmitry Monakhov } 3566b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3567e22834f0SDmitry Monakhov if (err) { 3568bfff6873SLukas Czerner ext4_remove_li_request(elr); 3569bfff6873SLukas Czerner continue; 3570bfff6873SLukas Czerner } 3571e22834f0SDmitry Monakhov if (!progress) { 3572e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3573e22834f0SDmitry Monakhov (prandom_u32() 3574e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3575b2c78cd0STheodore Ts'o } 3576bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3577bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3578bfff6873SLukas Czerner } 3579bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3580bfff6873SLukas Czerner 3581a0acae0eSTejun Heo try_to_freeze(); 3582bfff6873SLukas Czerner 35834ed5c033SLukas Czerner cur = jiffies; 35844ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3585f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3586bfff6873SLukas Czerner cond_resched(); 3587bfff6873SLukas Czerner continue; 3588bfff6873SLukas Czerner } 3589bfff6873SLukas Czerner 35904ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 35914ed5c033SLukas Czerner 35928f1f7453SEric Sandeen if (kthread_should_stop()) { 35938f1f7453SEric Sandeen ext4_clear_request_list(); 35948f1f7453SEric Sandeen goto exit_thread; 35958f1f7453SEric Sandeen } 3596bfff6873SLukas Czerner } 3597bfff6873SLukas Czerner 3598bfff6873SLukas Czerner exit_thread: 3599bfff6873SLukas Czerner /* 3600bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3601bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3602bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3603bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3604bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3605bfff6873SLukas Czerner * new one. 3606bfff6873SLukas Czerner */ 3607bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3608bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3609bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3610bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3611bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3612bfff6873SLukas Czerner goto cont_thread; 3613bfff6873SLukas Czerner } 3614bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3615bfff6873SLukas Czerner kfree(ext4_li_info); 3616bfff6873SLukas Czerner ext4_li_info = NULL; 3617bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3618bfff6873SLukas Czerner 3619bfff6873SLukas Czerner return 0; 3620bfff6873SLukas Czerner } 3621bfff6873SLukas Czerner 3622bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3623bfff6873SLukas Czerner { 3624bfff6873SLukas Czerner struct list_head *pos, *n; 3625bfff6873SLukas Czerner struct ext4_li_request *elr; 3626bfff6873SLukas Czerner 3627bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3628bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3629bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3630bfff6873SLukas Czerner lr_request); 3631bfff6873SLukas Czerner ext4_remove_li_request(elr); 3632bfff6873SLukas Czerner } 3633bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3634bfff6873SLukas Czerner } 3635bfff6873SLukas Czerner 3636bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3637bfff6873SLukas Czerner { 36388f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 36398f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 36408f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 36418f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3642bfff6873SLukas Czerner ext4_clear_request_list(); 3643bfff6873SLukas Czerner kfree(ext4_li_info); 3644bfff6873SLukas Czerner ext4_li_info = NULL; 364592b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3646bfff6873SLukas Czerner "initialization thread\n", 3647bfff6873SLukas Czerner err); 3648bfff6873SLukas Czerner return err; 3649bfff6873SLukas Czerner } 3650bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3651bfff6873SLukas Czerner return 0; 3652bfff6873SLukas Czerner } 3653bfff6873SLukas Czerner 3654bfff6873SLukas Czerner /* 3655bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3656bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3657bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3658bfff6873SLukas Czerner * groups and return total number of groups. 3659bfff6873SLukas Czerner */ 3660bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3661bfff6873SLukas Czerner { 3662bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3663bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3664bfff6873SLukas Czerner 36658844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 36668844618dSTheodore Ts'o return ngroups; 36678844618dSTheodore Ts'o 3668bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3669bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3670bfff6873SLukas Czerner if (!gdp) 3671bfff6873SLukas Czerner continue; 3672bfff6873SLukas Czerner 367350122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3674bfff6873SLukas Czerner break; 3675bfff6873SLukas Czerner } 3676bfff6873SLukas Czerner 3677bfff6873SLukas Czerner return group; 3678bfff6873SLukas Czerner } 3679bfff6873SLukas Czerner 3680bfff6873SLukas Czerner static int ext4_li_info_new(void) 3681bfff6873SLukas Czerner { 3682bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3683bfff6873SLukas Czerner 3684bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3685bfff6873SLukas Czerner if (!eli) 3686bfff6873SLukas Czerner return -ENOMEM; 3687bfff6873SLukas Czerner 3688bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3689bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3690bfff6873SLukas Czerner 3691bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3692bfff6873SLukas Czerner 3693bfff6873SLukas Czerner ext4_li_info = eli; 3694bfff6873SLukas Czerner 3695bfff6873SLukas Czerner return 0; 3696bfff6873SLukas Czerner } 3697bfff6873SLukas Czerner 3698bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3699bfff6873SLukas Czerner ext4_group_t start) 3700bfff6873SLukas Czerner { 3701bfff6873SLukas Czerner struct ext4_li_request *elr; 3702bfff6873SLukas Czerner 3703bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3704bfff6873SLukas Czerner if (!elr) 3705bfff6873SLukas Czerner return NULL; 3706bfff6873SLukas Czerner 3707bfff6873SLukas Czerner elr->lr_super = sb; 37083d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 370921175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 37103d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3711bfff6873SLukas Czerner elr->lr_next_group = start; 371221175ca4SHarshad Shirwadkar } else { 371321175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 37143d392b26STheodore Ts'o } 3715bfff6873SLukas Czerner 3716bfff6873SLukas Czerner /* 3717bfff6873SLukas Czerner * Randomize first schedule time of the request to 3718bfff6873SLukas Czerner * spread the inode table initialization requests 3719bfff6873SLukas Czerner * better. 3720bfff6873SLukas Czerner */ 3721dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3722dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3723bfff6873SLukas Czerner return elr; 3724bfff6873SLukas Czerner } 3725bfff6873SLukas Czerner 37267f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3727bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3728bfff6873SLukas Czerner { 3729bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 37307f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 373149598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 37326c5a6cb9SAndrew Morton int ret = 0; 3733bfff6873SLukas Czerner 37347f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 373551ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 373651ce6511SLukas Czerner /* 373751ce6511SLukas Czerner * Reset timeout so it can be computed again, because 373851ce6511SLukas Czerner * s_li_wait_mult might have changed. 373951ce6511SLukas Czerner */ 374051ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 37417f511862STheodore Ts'o goto out; 374251ce6511SLukas Czerner } 3743bfff6873SLukas Czerner 374421175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 37453d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 37463d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 37477f511862STheodore Ts'o goto out; 3748bfff6873SLukas Czerner 3749bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 37507f511862STheodore Ts'o if (!elr) { 37517f511862STheodore Ts'o ret = -ENOMEM; 37527f511862STheodore Ts'o goto out; 37537f511862STheodore Ts'o } 3754bfff6873SLukas Czerner 3755bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3756bfff6873SLukas Czerner ret = ext4_li_info_new(); 3757bfff6873SLukas Czerner if (ret) 3758bfff6873SLukas Czerner goto out; 3759bfff6873SLukas Czerner } 3760bfff6873SLukas Czerner 3761bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3762bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3763bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3764bfff6873SLukas Czerner 3765bfff6873SLukas Czerner sbi->s_li_request = elr; 376646e4690bSTao Ma /* 376746e4690bSTao Ma * set elr to NULL here since it has been inserted to 376846e4690bSTao Ma * the request_list and the removal and free of it is 376946e4690bSTao Ma * handled by ext4_clear_request_list from now on. 377046e4690bSTao Ma */ 377146e4690bSTao Ma elr = NULL; 3772bfff6873SLukas Czerner 3773bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3774bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3775bfff6873SLukas Czerner if (ret) 3776bfff6873SLukas Czerner goto out; 3777bfff6873SLukas Czerner } 3778bfff6873SLukas Czerner out: 3779bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3780beed5ecbSNicolas Kaiser if (ret) 3781bfff6873SLukas Czerner kfree(elr); 3782bfff6873SLukas Czerner return ret; 3783bfff6873SLukas Czerner } 3784bfff6873SLukas Czerner 3785bfff6873SLukas Czerner /* 3786bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3787bfff6873SLukas Czerner * module unload. 3788bfff6873SLukas Czerner */ 3789bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3790bfff6873SLukas Czerner { 3791bfff6873SLukas Czerner /* 3792bfff6873SLukas Czerner * If thread exited earlier 3793bfff6873SLukas Czerner * there's nothing to be done. 3794bfff6873SLukas Czerner */ 37958f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3796bfff6873SLukas Czerner return; 3797bfff6873SLukas Czerner 37988f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3799bfff6873SLukas Czerner } 3800bfff6873SLukas Czerner 380125ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 380225ed6e8aSDarrick J. Wong { 380325ed6e8aSDarrick J. Wong int ret = 1; 380425ed6e8aSDarrick J. Wong int compat, incompat; 380525ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 380625ed6e8aSDarrick J. Wong 38079aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3808db9ee220SDarrick J. Wong /* journal checksum v3 */ 380925ed6e8aSDarrick J. Wong compat = 0; 3810db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 381125ed6e8aSDarrick J. Wong } else { 381225ed6e8aSDarrick J. Wong /* journal checksum v1 */ 381325ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 381425ed6e8aSDarrick J. Wong incompat = 0; 381525ed6e8aSDarrick J. Wong } 381625ed6e8aSDarrick J. Wong 3817feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3818feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3819feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3820feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 382125ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 382225ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 382325ed6e8aSDarrick J. Wong compat, 0, 382425ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 382525ed6e8aSDarrick J. Wong incompat); 382625ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 382725ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 382825ed6e8aSDarrick J. Wong compat, 0, 382925ed6e8aSDarrick J. Wong incompat); 383025ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 383125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 383225ed6e8aSDarrick J. Wong } else { 3833feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3834feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 383525ed6e8aSDarrick J. Wong } 383625ed6e8aSDarrick J. Wong 383725ed6e8aSDarrick J. Wong return ret; 383825ed6e8aSDarrick J. Wong } 383925ed6e8aSDarrick J. Wong 3840952fc18eSTheodore Ts'o /* 3841952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3842952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3843952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3844952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3845952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3846952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3847952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3848952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3849952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3850952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3851952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3852952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3853952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3854952fc18eSTheodore Ts'o */ 3855952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3856952fc18eSTheodore Ts'o char *buf) 3857952fc18eSTheodore Ts'o { 3858952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3859952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3860952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3861952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3862952fc18eSTheodore Ts'o int s, j, count = 0; 3863952fc18eSTheodore Ts'o 3864e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 38650548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 38660548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 38670548bbb8STheodore Ts'o 3868952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3869952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3870952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3871952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3872952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3873952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3874952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3875952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3876952fc18eSTheodore Ts'o count++; 3877952fc18eSTheodore Ts'o } 3878952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3879952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3880952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3881952fc18eSTheodore Ts'o count++; 3882952fc18eSTheodore Ts'o } 3883952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3884952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3885952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3886952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3887952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3888952fc18eSTheodore Ts'o count++; 3889952fc18eSTheodore Ts'o } 3890952fc18eSTheodore Ts'o if (i != grp) 3891952fc18eSTheodore Ts'o continue; 3892952fc18eSTheodore Ts'o s = 0; 3893952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3894952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3895952fc18eSTheodore Ts'o count++; 3896952fc18eSTheodore Ts'o } 3897c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3898c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3899c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3900c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3901c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3902952fc18eSTheodore Ts'o } 3903c48ae41bSTheodore Ts'o count += j; 3904c48ae41bSTheodore Ts'o for (; j > 0; j--) 3905c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3906952fc18eSTheodore Ts'o } 3907952fc18eSTheodore Ts'o if (!count) 3908952fc18eSTheodore Ts'o return 0; 3909952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3910952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3911952fc18eSTheodore Ts'o } 3912952fc18eSTheodore Ts'o 3913952fc18eSTheodore Ts'o /* 3914952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3915952fc18eSTheodore Ts'o */ 3916952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3917952fc18eSTheodore Ts'o { 3918952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3919952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 39203c816dedSEric Whitney struct inode *j_inode; 39213c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3922952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3923952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 39244fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3925952fc18eSTheodore Ts'o 3926952fc18eSTheodore Ts'o if (!buf) 3927952fc18eSTheodore Ts'o return -ENOMEM; 3928952fc18eSTheodore Ts'o 3929952fc18eSTheodore Ts'o /* 3930952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3931952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3932952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3933952fc18eSTheodore Ts'o */ 3934952fc18eSTheodore Ts'o 3935952fc18eSTheodore Ts'o /* 3936952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3937952fc18eSTheodore Ts'o */ 3938952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3939952fc18eSTheodore Ts'o 3940952fc18eSTheodore Ts'o /* 3941952fc18eSTheodore Ts'o * Add the overhead found in each block group 3942952fc18eSTheodore Ts'o */ 3943952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3944952fc18eSTheodore Ts'o int blks; 3945952fc18eSTheodore Ts'o 3946952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3947952fc18eSTheodore Ts'o overhead += blks; 3948952fc18eSTheodore Ts'o if (blks) 3949952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3950952fc18eSTheodore Ts'o cond_resched(); 3951952fc18eSTheodore Ts'o } 39523c816dedSEric Whitney 39533c816dedSEric Whitney /* 39543c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 39553c816dedSEric Whitney * loaded or not 39563c816dedSEric Whitney */ 3957ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 3958ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 3959f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 3960f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 39613c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 39623c816dedSEric Whitney if (j_inode) { 39633c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 39643c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 39653c816dedSEric Whitney iput(j_inode); 39663c816dedSEric Whitney } else { 39673c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 39683c816dedSEric Whitney } 39693c816dedSEric Whitney } 3970952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3971952fc18eSTheodore Ts'o smp_wmb(); 3972952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3973952fc18eSTheodore Ts'o return 0; 3974952fc18eSTheodore Ts'o } 3975952fc18eSTheodore Ts'o 3976b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 397727dd4385SLukas Czerner { 397827dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3979b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 398027dd4385SLukas Czerner 398127dd4385SLukas Czerner /* 398230fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 398330fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 398430fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 398530fac0f7SJan Kara * to keep ext2/3 backward compatibility. 398630fac0f7SJan Kara */ 3987e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3988b5799018STheodore Ts'o return; 398930fac0f7SJan Kara /* 399027dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 399127dd4385SLukas Czerner * This should cover the situations where we can not afford to run 399227dd4385SLukas Czerner * out of space like for example punch hole, or converting 3993556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 399427dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 399527dd4385SLukas Czerner * very rare. 399627dd4385SLukas Czerner */ 3997b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3998b5799018STheodore Ts'o sbi->s_cluster_bits); 399927dd4385SLukas Czerner 400027dd4385SLukas Czerner do_div(resv_clusters, 50); 400127dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 400227dd4385SLukas Czerner 4003b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 400427dd4385SLukas Czerner } 400527dd4385SLukas Czerner 4006ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4007ca9b404fSRoman Anufriev { 4008ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4009ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4010ca9b404fSRoman Anufriev return "none"; 4011ca9b404fSRoman Anufriev 4012ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4013ca9b404fSRoman Anufriev return "journalled"; 4014ca9b404fSRoman Anufriev else 4015ca9b404fSRoman Anufriev return "writeback"; 4016ca9b404fSRoman Anufriev #else 4017ca9b404fSRoman Anufriev return "disabled"; 4018ca9b404fSRoman Anufriev #endif 4019ca9b404fSRoman Anufriev } 4020ca9b404fSRoman Anufriev 4021617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 4022ac27a0ecSDave Kleikamp { 40235e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 4024d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 40251d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4026617ba13bSMingming Cao struct ext4_super_block *es = NULL; 40275aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 40287c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4029617ba13bSMingming Cao ext4_fsblk_t block; 4030617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 403170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4032ac27a0ecSDave Kleikamp unsigned long offset = 0; 4033ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4034ac27a0ecSDave Kleikamp struct inode *root; 40350390131bSFrank Mayhar const char *descr; 4036dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4037281b5995STheodore Ts'o int blocksize, clustersize; 40384ec11028STheodore Ts'o unsigned int db_count; 40394ec11028STheodore Ts'o unsigned int i; 4040ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4041bd81d8eeSLaurent Vivier __u64 blocks_count; 404207aa2ea1SLukas Czerner int err = 0; 4043bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4044b237e304SHarshad Shirwadkar struct ext4_parsed_options parsed_opts; 4045b237e304SHarshad Shirwadkar 4046b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4047b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4048b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 4049196e402aSHarshad Shirwadkar parsed_opts.mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4050ac27a0ecSDave Kleikamp 40515aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 40525aee0f8aSTheodore Ts'o goto out_free_base; 4053705895b6SPekka Enberg 4054aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 4055705895b6SPekka Enberg sbi->s_blockgroup_lock = 4056705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 40575aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 40585aee0f8aSTheodore Ts'o goto out_free_base; 40595aee0f8aSTheodore Ts'o 4060ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 40612c0544b2STheodore Ts'o sbi->s_sb = sb; 4062240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4063d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 4064f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 40658446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4066ac27a0ecSDave Kleikamp 40679f6200bbSTheodore Ts'o /* Cleanup superblock name */ 4068ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 40699f6200bbSTheodore Ts'o 407007aa2ea1SLukas Czerner /* -EINVAL is default */ 4071dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4072617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4073ac27a0ecSDave Kleikamp if (!blocksize) { 4074b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4075ac27a0ecSDave Kleikamp goto out_fail; 4076ac27a0ecSDave Kleikamp } 4077ac27a0ecSDave Kleikamp 4078ac27a0ecSDave Kleikamp /* 4079617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4080ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4081ac27a0ecSDave Kleikamp */ 4082617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 408370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 408470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4085ac27a0ecSDave Kleikamp } else { 408670bbb3e0SAndrew Morton logical_sb_block = sb_block; 4087ac27a0ecSDave Kleikamp } 4088ac27a0ecSDave Kleikamp 40898394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 40908394a6abSzhangyi (F) if (IS_ERR(bh)) { 4091b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 40928394a6abSzhangyi (F) ret = PTR_ERR(bh); 4093ac27a0ecSDave Kleikamp goto out_fail; 4094ac27a0ecSDave Kleikamp } 4095ac27a0ecSDave Kleikamp /* 4096ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4097617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4098ac27a0ecSDave Kleikamp */ 40992716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4100ac27a0ecSDave Kleikamp sbi->s_es = es; 4101ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4102617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4103617ba13bSMingming Cao goto cantfind_ext4; 4104afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4105ac27a0ecSDave Kleikamp 4106feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4107e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4108e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4109363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4110feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4111feb0ab32SDarrick J. Wong 4112d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4113d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4114d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4115d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4116d25425f8SDarrick J. Wong silent = 1; 4117d25425f8SDarrick J. Wong goto cantfind_ext4; 4118d25425f8SDarrick J. Wong } 4119d25425f8SDarrick J. Wong 41200441984aSDarrick J. Wong /* Load the checksum driver */ 41210441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 41220441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 41230441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 41240441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 41250441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 41260441984aSDarrick J. Wong goto failed_mount; 41270441984aSDarrick J. Wong } 41280441984aSDarrick J. Wong 4129a9c47317SDarrick J. Wong /* Check superblock checksum */ 4130a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4131a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4132a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4133a9c47317SDarrick J. Wong silent = 1; 41346a797d27SDarrick J. Wong ret = -EFSBADCRC; 4135a9c47317SDarrick J. Wong goto cantfind_ext4; 4136a9c47317SDarrick J. Wong } 4137a9c47317SDarrick J. Wong 4138a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4139e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 41408c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4141dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4142a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4143a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4144a9c47317SDarrick J. Wong 4145ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4146ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4147fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4148617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4149fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 415087f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4151fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4152617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4153fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4154ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4155fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 415603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4157fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 41582e7842b8SHugh Dickins #endif 4159995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4160995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 416198c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 416298c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 416398c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 416498c1a759SDarrick J. Wong 4165617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4166fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4167617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4168fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4169617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4170fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4171ac27a0ecSDave Kleikamp 4172617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4173fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4174bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4175fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4176bb4f397aSAneesh Kumar K.V else 4177fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 417845f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4179fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 41808b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4181fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4182ac27a0ecSDave Kleikamp 418308cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 418408cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 418530773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 418630773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 418730773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4188ac27a0ecSDave Kleikamp 41898b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4190fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4191ac27a0ecSDave Kleikamp 41921e2462f9SMingming Cao /* 4193dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4194dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4195dd919b98SAneesh Kumar K.V */ 4196bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 41978b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4198fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4199dd919b98SAneesh Kumar K.V 420051ce6511SLukas Czerner /* 420151ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 420251ce6511SLukas Czerner * no mount option specified. 420351ce6511SLukas Czerner */ 420451ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 420551ce6511SLukas Czerner 4206c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4207c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4208c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4209c9200760STheodore Ts'o "Invalid log block size: %u", 4210c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4211c9200760STheodore Ts'o goto failed_mount; 4212c9200760STheodore Ts'o } 4213c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4214c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4215c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4216c9200760STheodore Ts'o "Invalid log cluster size: %u", 4217c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4218c9200760STheodore Ts'o goto failed_mount; 4219c9200760STheodore Ts'o } 4220c9200760STheodore Ts'o 4221c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4222626b035bSRitesh Harjani 4223626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4224626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4225626b035bSRitesh Harjani 42269803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 42279803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 42289803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 42299803387cSTheodore Ts'o } else { 42309803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 42319803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 42329803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 42339803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 42349803387cSTheodore Ts'o sbi->s_first_ino); 42359803387cSTheodore Ts'o goto failed_mount; 42369803387cSTheodore Ts'o } 42379803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 42389803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 42399803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 42409803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42419803387cSTheodore Ts'o "unsupported inode size: %d", 42429803387cSTheodore Ts'o sbi->s_inode_size); 42434f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 42449803387cSTheodore Ts'o goto failed_mount; 42459803387cSTheodore Ts'o } 42469803387cSTheodore Ts'o /* 42479803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 42489803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 42499803387cSTheodore Ts'o * field should suffice to ensure we have extra space 42509803387cSTheodore Ts'o * for all three. 42519803387cSTheodore Ts'o */ 42529803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 42539803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 42549803387cSTheodore Ts'o sb->s_time_gran = 1; 42559803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 42569803387cSTheodore Ts'o } else { 42579803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 42589803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 42599803387cSTheodore Ts'o } 42609803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 42619803387cSTheodore Ts'o } 42629803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 42639803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 42649803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 42659803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 42669803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 42679803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 42689803387cSTheodore Ts'o 42699803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 42709803387cSTheodore Ts'o if (v > max) { 42719803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42729803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 42739803387cSTheodore Ts'o goto failed_mount; 42749803387cSTheodore Ts'o } 42759803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 42769803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 42779803387cSTheodore Ts'o 42789803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 42799803387cSTheodore Ts'o if (v > max) { 42809803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42819803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 42829803387cSTheodore Ts'o goto failed_mount; 42839803387cSTheodore Ts'o } 42849803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 42859803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 42869803387cSTheodore Ts'o } 42879803387cSTheodore Ts'o } 42889803387cSTheodore Ts'o 42895aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 42905aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 42915aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 42925aee0f8aSTheodore Ts'o GFP_KERNEL); 42935aee0f8aSTheodore Ts'o if (!s_mount_opts) 42945aee0f8aSTheodore Ts'o goto failed_mount; 4295b237e304SHarshad Shirwadkar if (!parse_options(s_mount_opts, sb, &parsed_opts, 0)) { 42968b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 42978b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 42985aee0f8aSTheodore Ts'o s_mount_opts); 42995aee0f8aSTheodore Ts'o } 43005aee0f8aSTheodore Ts'o kfree(s_mount_opts); 43018b67f04aSTheodore Ts'o } 43025a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 4303b237e304SHarshad Shirwadkar if (!parse_options((char *) data, sb, &parsed_opts, 0)) 4304ac27a0ecSDave Kleikamp goto failed_mount; 4305ac27a0ecSDave Kleikamp 4306c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4307f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4308c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4309c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4310c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4311c83ad55eSGabriel Krisman Bertazi 4312c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4313c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4314c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4315c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4316c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4317c83ad55eSGabriel Krisman Bertazi } 4318c83ad55eSGabriel Krisman Bertazi 4319c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4320c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4321c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4322c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4323c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4324c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4325c83ad55eSGabriel Krisman Bertazi encoding_flags); 4326c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4327c83ad55eSGabriel Krisman Bertazi } 4328c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4329c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4330c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4331c83ad55eSGabriel Krisman Bertazi 4332f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4333f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4334c83ad55eSGabriel Krisman Bertazi } 4335c83ad55eSGabriel Krisman Bertazi #endif 4336c83ad55eSGabriel Krisman Bertazi 433756889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4338556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4339781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4340244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4341556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 434256889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 434356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 434456889787STheodore Ts'o "both data=journal and delalloc"); 434556889787STheodore Ts'o goto failed_mount; 434656889787STheodore Ts'o } 4347fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4348923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4349923ae0ffSRoss Zwisler "both data=journal and dax"); 4350923ae0ffSRoss Zwisler goto failed_mount; 4351923ae0ffSRoss Zwisler } 435273b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 435373b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 435473b92a2aSSergey Karamov "encrypted files will use data=ordered " 435573b92a2aSSergey Karamov "instead of data journaling mode"); 435673b92a2aSSergey Karamov } 435756889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 435856889787STheodore Ts'o clear_opt(sb, DELALLOC); 4359001e4a87STejun Heo } else { 4360001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 436156889787STheodore Ts'o } 436256889787STheodore Ts'o 43631751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 43641751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4365ac27a0ecSDave Kleikamp 4366617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4367e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4368e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4369e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4370b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4371b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4372b31e1552SEric Sandeen "running e2fsck is recommended"); 4373469108ffSTheodore Tso 4374ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4375ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4376e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4377ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4378ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4379ed3654ebSTheodore Ts'o goto failed_mount; 4380ed3654ebSTheodore Ts'o } 4381dec214d0STahsin Erdogan 4382dec214d0STahsin Erdogan /* 4383dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4384dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4385dec214d0STahsin Erdogan */ 4386dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4387dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4388dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4389dec214d0STahsin Erdogan goto failed_mount; 4390dec214d0STahsin Erdogan } 4391ed3654ebSTheodore Ts'o } 4392ed3654ebSTheodore Ts'o 43932035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 43942035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 43952035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 43962035e776STheodore Ts'o "using the ext4 subsystem"); 43972035e776STheodore Ts'o else { 43980d9366d6SEric Sandeen /* 43990d9366d6SEric Sandeen * If we're probing be silent, if this looks like 44000d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 44010d9366d6SEric Sandeen */ 44020d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 44030d9366d6SEric Sandeen goto failed_mount; 44042035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 44052035e776STheodore Ts'o "to feature incompatibilities"); 44062035e776STheodore Ts'o goto failed_mount; 44072035e776STheodore Ts'o } 44082035e776STheodore Ts'o } 44092035e776STheodore Ts'o 44102035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 44112035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 44122035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 44132035e776STheodore Ts'o "using the ext4 subsystem"); 44142035e776STheodore Ts'o else { 44150d9366d6SEric Sandeen /* 44160d9366d6SEric Sandeen * If we're probing be silent, if this looks like 44170d9366d6SEric Sandeen * it's actually an ext4 filesystem. 44180d9366d6SEric Sandeen */ 44190d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 44200d9366d6SEric Sandeen goto failed_mount; 44212035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 44222035e776STheodore Ts'o "to feature incompatibilities"); 44232035e776STheodore Ts'o goto failed_mount; 44242035e776STheodore Ts'o } 44252035e776STheodore Ts'o } 44262035e776STheodore Ts'o 4427469108ffSTheodore Tso /* 4428ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4429ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4430ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4431ac27a0ecSDave Kleikamp */ 4432bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4433ac27a0ecSDave Kleikamp goto failed_mount; 4434a13fb1a4SEric Sandeen 44355b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 44365b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 44375b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 44385b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 44395b9554dcSTheodore Ts'o goto failed_mount; 44405b9554dcSTheodore Ts'o } 44415b9554dcSTheodore Ts'o 4442a8ab6d38SIra Weiny if (bdev_dax_supported(sb->s_bdev, blocksize)) 4443a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4444a8ab6d38SIra Weiny 4445fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4446559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4447559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4448559db4c6SRoss Zwisler " that may contain inline data"); 4449361d24d4SEric Sandeen goto failed_mount; 4450559db4c6SRoss Zwisler } 4451a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 445224f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4453361d24d4SEric Sandeen "DAX unsupported by block device."); 4454361d24d4SEric Sandeen goto failed_mount; 445524f3478dSDan Williams } 4456923ae0ffSRoss Zwisler } 4457923ae0ffSRoss Zwisler 4458e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 44596ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 44606ddb2447STheodore Ts'o es->s_encryption_level); 44616ddb2447STheodore Ts'o goto failed_mount; 44626ddb2447STheodore Ts'o } 44636ddb2447STheodore Ts'o 4464ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4465ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4466ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4467b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4468ce40733cSAneesh Kumar K.V blocksize); 4469ac27a0ecSDave Kleikamp goto failed_mount; 4470ac27a0ecSDave Kleikamp } 4471ac27a0ecSDave Kleikamp 4472ac27a0ecSDave Kleikamp brelse(bh); 447370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 447470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 44758394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 44768394a6abSzhangyi (F) if (IS_ERR(bh)) { 4477b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4478b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 44798394a6abSzhangyi (F) ret = PTR_ERR(bh); 44808394a6abSzhangyi (F) bh = NULL; 4481ac27a0ecSDave Kleikamp goto failed_mount; 4482ac27a0ecSDave Kleikamp } 44832716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4484ac27a0ecSDave Kleikamp sbi->s_es = es; 4485617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4486b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4487b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4488ac27a0ecSDave Kleikamp goto failed_mount; 4489ac27a0ecSDave Kleikamp } 4490ac27a0ecSDave Kleikamp } 4491ac27a0ecSDave Kleikamp 4492e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4493f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4494f287a1a5STheodore Ts'o has_huge_files); 4495f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4496ac27a0ecSDave Kleikamp 44970d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4498e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 44998fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 45000d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4501d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4503b31e1552SEric Sandeen "unsupported descriptor size %lu", 45040d1ee42fSAlexandre Ratchov sbi->s_desc_size); 45050d1ee42fSAlexandre Ratchov goto failed_mount; 45060d1ee42fSAlexandre Ratchov } 45070d1ee42fSAlexandre Ratchov } else 45080d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 45090b8e58a1SAndreas Dilger 4510ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4511ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 45120b8e58a1SAndreas Dilger 4513617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4514ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4515617ba13bSMingming Cao goto cantfind_ext4; 4516cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4517cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4518cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4519b9c538daSJosh Triplett sbi->s_inodes_per_group); 4520cd6bb35bSTheodore Ts'o goto failed_mount; 4521cd6bb35bSTheodore Ts'o } 4522ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4523ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 45240d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4525ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4526ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4527e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4528e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 45290b8e58a1SAndreas Dilger 4530ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4531ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4532ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4533e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4534f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4535f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4536f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4537f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4538f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4539bc98a42cSDavid Howells if (!sb_rdonly(sb)) 454023301410STheodore Ts'o es->s_flags |= 454123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4542f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4543f99b2589STheodore Ts'o #else 4544bc98a42cSDavid Howells if (!sb_rdonly(sb)) 454523301410STheodore Ts'o es->s_flags |= 454623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4547f99b2589STheodore Ts'o #endif 4548f99b2589STheodore Ts'o } 454923301410STheodore Ts'o } 4550ac27a0ecSDave Kleikamp 4551281b5995STheodore Ts'o /* Handle clustersize */ 4552281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4553ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4554281b5995STheodore Ts'o if (clustersize < blocksize) { 4555281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4556281b5995STheodore Ts'o "cluster size (%d) smaller than " 4557281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4558281b5995STheodore Ts'o goto failed_mount; 4559281b5995STheodore Ts'o } 4560281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4561281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4562281b5995STheodore Ts'o sbi->s_clusters_per_group = 4563281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4564281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4565281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4566281b5995STheodore Ts'o "#clusters per group too big: %lu", 4567281b5995STheodore Ts'o sbi->s_clusters_per_group); 4568281b5995STheodore Ts'o goto failed_mount; 4569281b5995STheodore Ts'o } 4570281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4571281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4572281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4573281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4574281b5995STheodore Ts'o sbi->s_blocks_per_group, 4575281b5995STheodore Ts'o sbi->s_clusters_per_group); 4576281b5995STheodore Ts'o goto failed_mount; 4577281b5995STheodore Ts'o } 4578281b5995STheodore Ts'o } else { 4579281b5995STheodore Ts'o if (clustersize != blocksize) { 4580bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4581bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4582bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4583bfe0a5f4STheodore Ts'o goto failed_mount; 4584281b5995STheodore Ts'o } 4585ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4586b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4587b31e1552SEric Sandeen "#blocks per group too big: %lu", 4588ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4589ac27a0ecSDave Kleikamp goto failed_mount; 4590ac27a0ecSDave Kleikamp } 4591281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4592281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4593281b5995STheodore Ts'o } 4594281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4595281b5995STheodore Ts'o 4596960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4597960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4598960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4599960fd856STheodore Ts'o 4600bf43d84bSEric Sandeen /* 4601bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4602bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4603bf43d84bSEric Sandeen */ 46045a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 460530ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 46065a9ae68aSDarrick J. Wong if (err) { 4607b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4608bf43d84bSEric Sandeen " too large to mount safely on this system"); 4609ac27a0ecSDave Kleikamp goto failed_mount; 4610ac27a0ecSDave Kleikamp } 4611ac27a0ecSDave Kleikamp 4612617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4613617ba13bSMingming Cao goto cantfind_ext4; 4614e7c95593SEric Sandeen 46150f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 46160f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 46170f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4618b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4619b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 46200f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 46210f2ddca6SFrom: Thiemo Nagel goto failed_mount; 46220f2ddca6SFrom: Thiemo Nagel } 46230f2ddca6SFrom: Thiemo Nagel 46244ec11028STheodore Ts'o /* 46254ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 46264ec11028STheodore Ts'o * of the filesystem. 46274ec11028STheodore Ts'o */ 46284ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4629b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4630b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4631e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 46324ec11028STheodore Ts'o ext4_blocks_count(es)); 4633e7c95593SEric Sandeen goto failed_mount; 4634e7c95593SEric Sandeen } 4635bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4636bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4637bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4638bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4639bfe0a5f4STheodore Ts'o goto failed_mount; 4640bfe0a5f4STheodore Ts'o } 4641bfe0a5f4STheodore Ts'o 4642bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4643bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4644bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4645bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 46464ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4647df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 46484ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4649df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 46504ec11028STheodore Ts'o ext4_blocks_count(es), 46514ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 46524ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 46534ec11028STheodore Ts'o goto failed_mount; 46544ec11028STheodore Ts'o } 4655bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4656fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4657fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 46589e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 46599e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 46609e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 46619e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 46629e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 46639e463084STheodore Ts'o ret = -EINVAL; 46649e463084STheodore Ts'o goto failed_mount; 46659e463084STheodore Ts'o } 4666617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4667617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 46683a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 46692ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 46703a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 46713a4b77cdSEryu Guan "first meta block group too large: %u " 46723a4b77cdSEryu Guan "(group descriptor block count %u)", 46733a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 46743a4b77cdSEryu Guan goto failed_mount; 46753a4b77cdSEryu Guan } 46763a4b77cdSEryu Guan } 46771d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 46781d0c3924STheodore Ts'o kvmalloc_array(db_count, 4679f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 46801d0c3924STheodore Ts'o GFP_KERNEL)); 4681ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4682b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 46832cde417dSTheodore Ts'o ret = -ENOMEM; 4684ac27a0ecSDave Kleikamp goto failed_mount; 4685ac27a0ecSDave Kleikamp } 4686ac27a0ecSDave Kleikamp 4687705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4688ac27a0ecSDave Kleikamp 468985c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 469085c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 469185c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 46925df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 469385c8f176SAndrew Perepechko } 469485c8f176SAndrew Perepechko 4695ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 46961d0c3924STheodore Ts'o struct buffer_head *bh; 46971d0c3924STheodore Ts'o 469870bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 46998394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 47008394a6abSzhangyi (F) if (IS_ERR(bh)) { 4701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4702b31e1552SEric Sandeen "can't read group descriptor %d", i); 4703ac27a0ecSDave Kleikamp db_count = i; 47048394a6abSzhangyi (F) ret = PTR_ERR(bh); 4705ac27a0ecSDave Kleikamp goto failed_mount2; 4706ac27a0ecSDave Kleikamp } 47071d0c3924STheodore Ts'o rcu_read_lock(); 47081d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 47091d0c3924STheodore Ts'o rcu_read_unlock(); 4710ac27a0ecSDave Kleikamp } 471144de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4712829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4713b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 47146a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4715f9ae9cf5STheodore Ts'o goto failed_mount2; 4716ac27a0ecSDave Kleikamp } 4717772cb7c8SJose R. Santos 4718235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 4719c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 4720c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 472104496411STao Ma 4722a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4723eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4724ce7e010aSTheodore Ts'o goto failed_mount3; 4725ce7e010aSTheodore Ts'o 4726c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 472767a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4728c9de560dSAlex Tomas 4729f9ae9cf5STheodore Ts'o /* 4730f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4731f9ae9cf5STheodore Ts'o */ 4732f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4733617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4734617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4735643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 4736a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4737ffcc4182SEric Biggers #endif 4738c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 4739c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 4740c93d8f88SEric Biggers #endif 4741ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4742617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4743e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 47441fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4745262b4662SJan Kara else 4746262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4747689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4748ac27a0ecSDave Kleikamp #endif 474985787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4750f2fa2ffcSAneesh Kumar K.V 4751ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 47523b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4753ac27a0ecSDave Kleikamp 4754aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 4755aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 4756aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_ineligible_updates, 0); 4757aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4758aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4759aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4760aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4761aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 47629b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 47639b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 4764aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 4765aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 47668016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 47678016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 47688016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 47698016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 47708016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 47718016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 47728016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4773aa75f4d3SHarshad Shirwadkar 4774ac27a0ecSDave Kleikamp sb->s_root = NULL; 4775ac27a0ecSDave Kleikamp 4776ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4777e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4778ac27a0ecSDave Kleikamp 4779bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4780c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 478150460fe8SDarrick J. Wong goto failed_mount3a; 4782c5e06d10SJohann Lombardi 4783ac27a0ecSDave Kleikamp /* 4784ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4785ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4786ac27a0ecSDave Kleikamp */ 4787e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 4788b237e304SHarshad Shirwadkar err = ext4_load_journal(sb, es, parsed_opts.journal_devnum); 47894753d8a2STheodore Ts'o if (err) 479050460fe8SDarrick J. Wong goto failed_mount3a; 4791bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4792e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4793b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4794b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4795744692dcSJiaying Zhang goto failed_mount_wq; 4796ac27a0ecSDave Kleikamp } else { 47971e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 47981e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 47991e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48001e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 48011e381f60SDmitry Monakhov goto failed_mount_wq; 48021e381f60SDmitry Monakhov } 48031e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 48041e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48051e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 48061e381f60SDmitry Monakhov goto failed_mount_wq; 48071e381f60SDmitry Monakhov } 48081e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 48091e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48101e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 48111e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 48121e381f60SDmitry Monakhov goto failed_mount_wq; 48131e381f60SDmitry Monakhov } 48141e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 48151e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 48161e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48171e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 48181e381f60SDmitry Monakhov goto failed_mount_wq; 48191e381f60SDmitry Monakhov } 482050b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 48211e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4822fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 4823995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 48240390131bSFrank Mayhar sbi->s_journal = NULL; 48250390131bSFrank Mayhar needs_recovery = 0; 48260390131bSFrank Mayhar goto no_journal; 4827ac27a0ecSDave Kleikamp } 4828ac27a0ecSDave Kleikamp 4829e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4830eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4831eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4832b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4833744692dcSJiaying Zhang goto failed_mount_wq; 4834eb40a09cSJose R. Santos } 4835eb40a09cSJose R. Santos 483625ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 483725ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 483825ed6e8aSDarrick J. Wong "feature set"); 483925ed6e8aSDarrick J. Wong goto failed_mount_wq; 4840d4da6c9cSLinus Torvalds } 4841818d276cSGirish Shilamkar 4842a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 4843a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4844a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 4845a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 4846a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 4847a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 4848a1e5e465SHarshad Shirwadkar } 4849a1e5e465SHarshad Shirwadkar 4850ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4851ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4852ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4853ac27a0ecSDave Kleikamp case 0: 4854ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 485563f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 485663f57933SAndrew Morton * cope, else JOURNAL_DATA 485763f57933SAndrew Morton */ 4858dab291afSMingming Cao if (jbd2_journal_check_available_features 485927f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4860fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 486127f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 486227f394a7STyson Nottingham } else { 4863fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 486427f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 486527f394a7STyson Nottingham } 4866ac27a0ecSDave Kleikamp break; 4867ac27a0ecSDave Kleikamp 4868617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4869617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4870dab291afSMingming Cao if (!jbd2_journal_check_available_features 4871dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4872b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4873b31e1552SEric Sandeen "requested data journaling mode"); 4874744692dcSJiaying Zhang goto failed_mount_wq; 4875ac27a0ecSDave Kleikamp } 48765a150bdeSGustavo A. R. Silva break; 4877ac27a0ecSDave Kleikamp default: 4878ac27a0ecSDave Kleikamp break; 4879ac27a0ecSDave Kleikamp } 4880ab04df78SJan Kara 4881ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4882ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4883ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4884ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4885ab04df78SJan Kara goto failed_mount_wq; 4886ab04df78SJan Kara } 4887ab04df78SJan Kara 4888b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 4889ac27a0ecSDave Kleikamp 4890342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 4891afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 4892342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 4893afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 489418aadd47SBobi Jam 4895ce7e010aSTheodore Ts'o no_journal: 4896cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 489747387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 489847387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4899cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4900cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 49019c191f70ST Makphaibulchoke goto failed_mount_wq; 49029c191f70ST Makphaibulchoke } 49039c191f70ST Makphaibulchoke 4904dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4905dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4906dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4907dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4908dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4909dec214d0STahsin Erdogan goto failed_mount_wq; 4910dec214d0STahsin Erdogan } 4911dec214d0STahsin Erdogan } 4912cdb7ee4cSTahsin Erdogan } 4913dec214d0STahsin Erdogan 4914c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 4915c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 4916c93d8f88SEric Biggers goto failed_mount_wq; 4917c93d8f88SEric Biggers } 4918c93d8f88SEric Biggers 4919bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4920e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4921e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 49224392fbc4SJan Kara ext4_commit_super(sb); 49236ddb2447STheodore Ts'o } 49246ddb2447STheodore Ts'o 4925fd89d5f2STejun Heo /* 4926952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4927952fc18eSTheodore Ts'o * superblock if present. 4928952fc18eSTheodore Ts'o */ 4929952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4930952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4931952fc18eSTheodore Ts'o else { 493207aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 493307aa2ea1SLukas Czerner if (err) 4934952fc18eSTheodore Ts'o goto failed_mount_wq; 4935952fc18eSTheodore Ts'o } 4936952fc18eSTheodore Ts'o 4937952fc18eSTheodore Ts'o /* 4938fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4939fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4940fd89d5f2STejun Heo */ 49412e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 49422e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 49432e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 49442e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 494507aa2ea1SLukas Czerner ret = -ENOMEM; 49462e8fa54eSJan Kara goto failed_mount4; 49472e8fa54eSJan Kara } 49482e8fa54eSJan Kara 4949ac27a0ecSDave Kleikamp /* 4950dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4951ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4952ac27a0ecSDave Kleikamp */ 4953ac27a0ecSDave Kleikamp 49548a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 49551d1fe1eeSDavid Howells if (IS_ERR(root)) { 4956b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 49571d1fe1eeSDavid Howells ret = PTR_ERR(root); 495832a9bb57SManish Katiyar root = NULL; 4959ac27a0ecSDave Kleikamp goto failed_mount4; 4960ac27a0ecSDave Kleikamp } 4961ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4962b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 496394bf608aSAl Viro iput(root); 4964ac27a0ecSDave Kleikamp goto failed_mount4; 4965ac27a0ecSDave Kleikamp } 4966b886ee3eSGabriel Krisman Bertazi 496748fde701SAl Viro sb->s_root = d_make_root(root); 49681d1fe1eeSDavid Howells if (!sb->s_root) { 4969b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 49701d1fe1eeSDavid Howells ret = -ENOMEM; 49711d1fe1eeSDavid Howells goto failed_mount4; 49721d1fe1eeSDavid Howells } 4973ac27a0ecSDave Kleikamp 4974c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 4975c89128a0SJaegeuk Kim if (ret == -EROFS) { 49761751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4977c89128a0SJaegeuk Kim ret = 0; 4978c89128a0SJaegeuk Kim } else if (ret) 4979c89128a0SJaegeuk Kim goto failed_mount4a; 4980ef7f3835SKalpak Shah 4981b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 498227dd4385SLukas Czerner 49830f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 49846fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 49856fd058f7STheodore Ts'o if (err) { 4986b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4987fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4988f9ae9cf5STheodore Ts'o goto failed_mount4a; 4989f9ae9cf5STheodore Ts'o } 49900f5bde1dSJan Kara } 49918016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 4992f9ae9cf5STheodore Ts'o 4993f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4994196e402aSHarshad Shirwadkar 4995196e402aSHarshad Shirwadkar /* 4996196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 4997196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 4998196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 4999196e402aSHarshad Shirwadkar */ 5000196e402aSHarshad Shirwadkar if (parsed_opts.mb_optimize_scan == 1) 5001196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5002196e402aSHarshad Shirwadkar else if (parsed_opts.mb_optimize_scan == 0) 5003196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5004196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5005196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5006196e402aSHarshad Shirwadkar 5007f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5008f9ae9cf5STheodore Ts'o if (err) { 5009f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5010f9ae9cf5STheodore Ts'o err); 5011dcf2d804STao Ma goto failed_mount5; 5012c2774d84SAneesh Kumar K.V } 5013c2774d84SAneesh Kumar K.V 5014027f14f5STheodore Ts'o /* 5015027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5016027f14f5STheodore Ts'o * mballoc is initialized 5017027f14f5STheodore Ts'o */ 5018027f14f5STheodore Ts'o if (sbi->s_journal) 5019027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5020027f14f5STheodore Ts'o ext4_journal_commit_callback; 5021027f14f5STheodore Ts'o 5022d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5023d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5024d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5025908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5026908c7f19STejun Heo GFP_KERNEL); 5027d5e03cbbSTheodore Ts'o if (!err) { 5028d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5029d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5030908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5031908c7f19STejun Heo GFP_KERNEL); 5032d5e03cbbSTheodore Ts'o } 5033d5e03cbbSTheodore Ts'o if (!err) 5034d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5035908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5036d5e03cbbSTheodore Ts'o if (!err) 5037908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5038908c7f19STejun Heo GFP_KERNEL); 5039c8585c6fSDaeho Jeong if (!err) 5040efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5041efc61345SEric Whitney GFP_KERNEL); 5042efc61345SEric Whitney if (!err) 5043bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5044c8585c6fSDaeho Jeong 5045d5e03cbbSTheodore Ts'o if (err) { 5046d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5047d5e03cbbSTheodore Ts'o goto failed_mount6; 5048d5e03cbbSTheodore Ts'o } 5049d5e03cbbSTheodore Ts'o 5050e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5051d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5052d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5053d5e03cbbSTheodore Ts'o "unable to initialize " 5054d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 5055d5e03cbbSTheodore Ts'o goto failed_mount6; 5056d5e03cbbSTheodore Ts'o } 5057d5e03cbbSTheodore Ts'o 5058bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5059bfff6873SLukas Czerner if (err) 5060dcf2d804STao Ma goto failed_mount6; 5061bfff6873SLukas Czerner 5062b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5063dcf2d804STao Ma if (err) 5064dcf2d804STao Ma goto failed_mount7; 50653197ebdbSTheodore Ts'o 50669b2ff357SJan Kara #ifdef CONFIG_QUOTA 50679b2ff357SJan Kara /* Enable quota usage during mount. */ 5068bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 50699b2ff357SJan Kara err = ext4_enable_quotas(sb); 50709b2ff357SJan Kara if (err) 50719b2ff357SJan Kara goto failed_mount8; 50729b2ff357SJan Kara } 50739b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 50749b2ff357SJan Kara 5075bc71726cSzhangyi (F) /* 5076bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5077bc71726cSzhangyi (F) * used to detect the metadata async write error. 5078bc71726cSzhangyi (F) */ 5079bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5080bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5081bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5082bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5083617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5084617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5085617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 50860390131bSFrank Mayhar if (needs_recovery) { 5087b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 508811215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 508911215630SJan Kara if (err) 509011215630SJan Kara goto failed_mount8; 50910390131bSFrank Mayhar } 50920390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 50930390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 50940390131bSFrank Mayhar descr = " journalled data mode"; 50950390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 50960390131bSFrank Mayhar descr = " ordered data mode"; 50970390131bSFrank Mayhar else 50980390131bSFrank Mayhar descr = " writeback data mode"; 50990390131bSFrank Mayhar } else 51000390131bSFrank Mayhar descr = "out journal"; 51010390131bSFrank Mayhar 510279add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 510379add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 510479add3a3SLukas Czerner if (!blk_queue_discard(q)) 510579add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 510679add3a3SLukas Czerner "mounting with \"discard\" option, but " 510779add3a3SLukas Czerner "the device does not support discard"); 510879add3a3SLukas Czerner } 510979add3a3SLukas Czerner 5110e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 5111d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5112ca9b404fSRoman Anufriev "Opts: %.*s%s%s. Quota mode: %s.", descr, 51135aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 51145aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 5115ca9b404fSRoman Anufriev *sbi->s_es->s_mount_opts ? "; " : "", orig_data, 5116ca9b404fSRoman Anufriev ext4_quota_mode(sb)); 5117ac27a0ecSDave Kleikamp 511866e61a9eSTheodore Ts'o if (es->s_error_count) 511966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5120ac27a0ecSDave Kleikamp 5121efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5122efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5123efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5124efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 51251cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 51261cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5127efbed4dcSTheodore Ts'o 5128d4c402d9SCurt Wohlgemuth kfree(orig_data); 5129ac27a0ecSDave Kleikamp return 0; 5130ac27a0ecSDave Kleikamp 5131617ba13bSMingming Cao cantfind_ext4: 5132ac27a0ecSDave Kleikamp if (!silent) 5133b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5134ac27a0ecSDave Kleikamp goto failed_mount; 5135ac27a0ecSDave Kleikamp 513672ba7450STheodore Ts'o failed_mount8: 5137ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5138cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5139dcf2d804STao Ma failed_mount7: 5140dcf2d804STao Ma ext4_unregister_li_request(sb); 5141dcf2d804STao Ma failed_mount6: 5142f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 51437c990728SSuraj Jitindar Singh rcu_read_lock(); 51447c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 51457c990728SSuraj Jitindar Singh if (flex_groups) { 51467c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 51477c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 51487c990728SSuraj Jitindar Singh kvfree(flex_groups); 51497c990728SSuraj Jitindar Singh } 51507c990728SSuraj Jitindar Singh rcu_read_unlock(); 5151d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5152d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5153d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5154d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5155efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5156bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 515700764937SAzat Khuzhin failed_mount5: 5158f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5159f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5160f9ae9cf5STheodore Ts'o failed_mount4a: 516194bf608aSAl Viro dput(sb->s_root); 516232a9bb57SManish Katiyar sb->s_root = NULL; 516394bf608aSAl Viro failed_mount4: 5164b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 51652e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 51662e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 51674c0425ffSMingming Cao failed_mount_wq: 5168dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5169dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 517050c15df6SChengguang Xu 517147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 517247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 517350c15df6SChengguang Xu 51740390131bSFrank Mayhar if (sbi->s_journal) { 5175dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 517647b4a50bSJan Kara sbi->s_journal = NULL; 51770390131bSFrank Mayhar } 517850460fe8SDarrick J. Wong failed_mount3a: 5179d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5180eb68d0e2SZheng Liu failed_mount3: 5181c92dc856SJan Kara flush_work(&sbi->s_error_work); 51822a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5183c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 5184c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 5185ac27a0ecSDave Kleikamp failed_mount2: 51861d0c3924STheodore Ts'o rcu_read_lock(); 51871d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5188ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 51891d0c3924STheodore Ts'o brelse(group_desc[i]); 51901d0c3924STheodore Ts'o kvfree(group_desc); 51911d0c3924STheodore Ts'o rcu_read_unlock(); 5192ac27a0ecSDave Kleikamp failed_mount: 51930441984aSDarrick J. Wong if (sbi->s_chksum_driver) 51940441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5195c83ad55eSGabriel Krisman Bertazi 5196c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5197f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5198c83ad55eSGabriel Krisman Bertazi #endif 5199c83ad55eSGabriel Krisman Bertazi 5200ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5201a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 52020ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5203ac27a0ecSDave Kleikamp #endif 5204ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5205617ba13bSMingming Cao ext4_blkdev_remove(sbi); 5206ac27a0ecSDave Kleikamp brelse(bh); 5207ac27a0ecSDave Kleikamp out_fail: 5208ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5209f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 52105aee0f8aSTheodore Ts'o out_free_base: 5211ac27a0ecSDave Kleikamp kfree(sbi); 5212d4c402d9SCurt Wohlgemuth kfree(orig_data); 52135e405595SDan Williams fs_put_dax(dax_dev); 521407aa2ea1SLukas Czerner return err ? err : ret; 5215ac27a0ecSDave Kleikamp } 5216ac27a0ecSDave Kleikamp 5217ac27a0ecSDave Kleikamp /* 5218ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5219ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5220ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5221ac27a0ecSDave Kleikamp */ 5222617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5223ac27a0ecSDave Kleikamp { 5224617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5225ac27a0ecSDave Kleikamp 5226ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 522730773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 522830773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 52296866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5230ac27a0ecSDave Kleikamp 5231a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5232ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5233dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5234ac27a0ecSDave Kleikamp else 5235dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 52365bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 52375bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 52385bf5683aSHidehiro Kawai else 52395bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5240a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5241ac27a0ecSDave Kleikamp } 5242ac27a0ecSDave Kleikamp 5243c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5244ac27a0ecSDave Kleikamp unsigned int journal_inum) 5245ac27a0ecSDave Kleikamp { 5246ac27a0ecSDave Kleikamp struct inode *journal_inode; 5247ac27a0ecSDave Kleikamp 5248c6cb7e77SEric Whitney /* 5249c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5250c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5251c6cb7e77SEric Whitney * will try to delete it. 5252c6cb7e77SEric Whitney */ 52538a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 52541d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5255b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5256ac27a0ecSDave Kleikamp return NULL; 5257ac27a0ecSDave Kleikamp } 5258ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5259ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5260ac27a0ecSDave Kleikamp iput(journal_inode); 5261b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5262ac27a0ecSDave Kleikamp return NULL; 5263ac27a0ecSDave Kleikamp } 5264ac27a0ecSDave Kleikamp 5265e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5266ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 52671d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5268b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5269ac27a0ecSDave Kleikamp iput(journal_inode); 5270ac27a0ecSDave Kleikamp return NULL; 5271ac27a0ecSDave Kleikamp } 5272c6cb7e77SEric Whitney return journal_inode; 5273c6cb7e77SEric Whitney } 5274c6cb7e77SEric Whitney 5275c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5276c6cb7e77SEric Whitney unsigned int journal_inum) 5277c6cb7e77SEric Whitney { 5278c6cb7e77SEric Whitney struct inode *journal_inode; 5279c6cb7e77SEric Whitney journal_t *journal; 5280c6cb7e77SEric Whitney 528111215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 528211215630SJan Kara return NULL; 5283c6cb7e77SEric Whitney 5284c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5285c6cb7e77SEric Whitney if (!journal_inode) 5286c6cb7e77SEric Whitney return NULL; 5287ac27a0ecSDave Kleikamp 5288dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5289ac27a0ecSDave Kleikamp if (!journal) { 5290b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5291ac27a0ecSDave Kleikamp iput(journal_inode); 5292ac27a0ecSDave Kleikamp return NULL; 5293ac27a0ecSDave Kleikamp } 5294ac27a0ecSDave Kleikamp journal->j_private = sb; 5295617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5296ac27a0ecSDave Kleikamp return journal; 5297ac27a0ecSDave Kleikamp } 5298ac27a0ecSDave Kleikamp 5299617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5300ac27a0ecSDave Kleikamp dev_t j_dev) 5301ac27a0ecSDave Kleikamp { 5302ac27a0ecSDave Kleikamp struct buffer_head *bh; 5303ac27a0ecSDave Kleikamp journal_t *journal; 5304617ba13bSMingming Cao ext4_fsblk_t start; 5305617ba13bSMingming Cao ext4_fsblk_t len; 5306ac27a0ecSDave Kleikamp int hblock, blocksize; 5307617ba13bSMingming Cao ext4_fsblk_t sb_block; 5308ac27a0ecSDave Kleikamp unsigned long offset; 5309617ba13bSMingming Cao struct ext4_super_block *es; 5310ac27a0ecSDave Kleikamp struct block_device *bdev; 5311ac27a0ecSDave Kleikamp 531211215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 531311215630SJan Kara return NULL; 53140390131bSFrank Mayhar 5315b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5316ac27a0ecSDave Kleikamp if (bdev == NULL) 5317ac27a0ecSDave Kleikamp return NULL; 5318ac27a0ecSDave Kleikamp 5319ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5320e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5321ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5322b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5323b31e1552SEric Sandeen "blocksize too small for journal device"); 5324ac27a0ecSDave Kleikamp goto out_bdev; 5325ac27a0ecSDave Kleikamp } 5326ac27a0ecSDave Kleikamp 5327617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5328617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5329ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5330ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5331b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5332b31e1552SEric Sandeen "external journal"); 5333ac27a0ecSDave Kleikamp goto out_bdev; 5334ac27a0ecSDave Kleikamp } 5335ac27a0ecSDave Kleikamp 53362716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5337617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5338ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5339617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5340b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5341b31e1552SEric Sandeen "bad superblock"); 5342ac27a0ecSDave Kleikamp brelse(bh); 5343ac27a0ecSDave Kleikamp goto out_bdev; 5344ac27a0ecSDave Kleikamp } 5345ac27a0ecSDave Kleikamp 5346df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5347df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5348df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5349df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5350df4763beSDarrick J. Wong "corrupt superblock"); 5351df4763beSDarrick J. Wong brelse(bh); 5352df4763beSDarrick J. Wong goto out_bdev; 5353df4763beSDarrick J. Wong } 5354df4763beSDarrick J. Wong 5355617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5356b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5357ac27a0ecSDave Kleikamp brelse(bh); 5358ac27a0ecSDave Kleikamp goto out_bdev; 5359ac27a0ecSDave Kleikamp } 5360ac27a0ecSDave Kleikamp 5361bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5362ac27a0ecSDave Kleikamp start = sb_block + 1; 5363ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5364ac27a0ecSDave Kleikamp 5365dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5366ac27a0ecSDave Kleikamp start, len, blocksize); 5367ac27a0ecSDave Kleikamp if (!journal) { 5368b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5369ac27a0ecSDave Kleikamp goto out_bdev; 5370ac27a0ecSDave Kleikamp } 5371ac27a0ecSDave Kleikamp journal->j_private = sb; 53722d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5373b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5374ac27a0ecSDave Kleikamp goto out_journal; 5375ac27a0ecSDave Kleikamp } 5376ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5377b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5378b31e1552SEric Sandeen "user (unsupported) - %d", 5379ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5380ac27a0ecSDave Kleikamp goto out_journal; 5381ac27a0ecSDave Kleikamp } 5382ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5383617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5384ac27a0ecSDave Kleikamp return journal; 53850b8e58a1SAndreas Dilger 5386ac27a0ecSDave Kleikamp out_journal: 5387dab291afSMingming Cao jbd2_journal_destroy(journal); 5388ac27a0ecSDave Kleikamp out_bdev: 5389617ba13bSMingming Cao ext4_blkdev_put(bdev); 5390ac27a0ecSDave Kleikamp return NULL; 5391ac27a0ecSDave Kleikamp } 5392ac27a0ecSDave Kleikamp 5393617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5394617ba13bSMingming Cao struct ext4_super_block *es, 5395ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5396ac27a0ecSDave Kleikamp { 5397ac27a0ecSDave Kleikamp journal_t *journal; 5398ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5399ac27a0ecSDave Kleikamp dev_t journal_dev; 5400ac27a0ecSDave Kleikamp int err = 0; 5401ac27a0ecSDave Kleikamp int really_read_only; 5402273108faSLukas Czerner int journal_dev_ro; 5403ac27a0ecSDave Kleikamp 540411215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 540511215630SJan Kara return -EFSCORRUPTED; 54060390131bSFrank Mayhar 5407ac27a0ecSDave Kleikamp if (journal_devnum && 5408ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5409b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5410b31e1552SEric Sandeen "numbers have changed"); 5411ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5412ac27a0ecSDave Kleikamp } else 5413ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5414ac27a0ecSDave Kleikamp 5415273108faSLukas Czerner if (journal_inum && journal_dev) { 5416273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5417273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5418273108faSLukas Czerner return -EINVAL; 5419273108faSLukas Czerner } 5420273108faSLukas Czerner 5421273108faSLukas Czerner if (journal_inum) { 5422273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5423273108faSLukas Czerner if (!journal) 5424273108faSLukas Czerner return -EINVAL; 5425273108faSLukas Czerner } else { 5426273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5427273108faSLukas Czerner if (!journal) 5428273108faSLukas Czerner return -EINVAL; 5429273108faSLukas Czerner } 5430273108faSLukas Czerner 5431273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5432273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5433273108faSLukas Czerner 5434273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5435273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5436273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5437273108faSLukas Czerner err = -EROFS; 5438273108faSLukas Czerner goto err_out; 5439273108faSLukas Czerner } 5440ac27a0ecSDave Kleikamp 5441ac27a0ecSDave Kleikamp /* 5442ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5443ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5444ac27a0ecSDave Kleikamp * can get read-write access to the device. 5445ac27a0ecSDave Kleikamp */ 5446e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5447bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5448b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5449b31e1552SEric Sandeen "required on readonly filesystem"); 5450ac27a0ecSDave Kleikamp if (really_read_only) { 5451b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5452d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5453d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5454273108faSLukas Czerner err = -EROFS; 5455273108faSLukas Czerner goto err_out; 5456ac27a0ecSDave Kleikamp } 5457b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5458b31e1552SEric Sandeen "be enabled during recovery"); 5459ac27a0ecSDave Kleikamp } 5460ac27a0ecSDave Kleikamp } 5461ac27a0ecSDave Kleikamp 546290576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5463b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 54644776004fSTheodore Ts'o 5465e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5466dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 54671c13d5c0STheodore Ts'o if (!err) { 54681c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 54691c13d5c0STheodore Ts'o if (save) 54701c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 54711c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5472dab291afSMingming Cao err = jbd2_journal_load(journal); 54731c13d5c0STheodore Ts'o if (save) 54741c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 54751c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 54761c13d5c0STheodore Ts'o kfree(save); 54771c13d5c0STheodore Ts'o } 5478ac27a0ecSDave Kleikamp 5479ac27a0ecSDave Kleikamp if (err) { 5480b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5481273108faSLukas Czerner goto err_out; 5482ac27a0ecSDave Kleikamp } 5483ac27a0ecSDave Kleikamp 5484617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 548511215630SJan Kara err = ext4_clear_journal_err(sb, es); 548611215630SJan Kara if (err) { 548711215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 548811215630SJan Kara jbd2_journal_destroy(journal); 548911215630SJan Kara return err; 549011215630SJan Kara } 5491ac27a0ecSDave Kleikamp 5492c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5493ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5494ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5495ac27a0ecSDave Kleikamp 5496ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 54974392fbc4SJan Kara ext4_commit_super(sb); 5498ac27a0ecSDave Kleikamp } 5499ac27a0ecSDave Kleikamp 5500ac27a0ecSDave Kleikamp return 0; 5501273108faSLukas Czerner 5502273108faSLukas Czerner err_out: 5503273108faSLukas Czerner jbd2_journal_destroy(journal); 5504273108faSLukas Czerner return err; 5505ac27a0ecSDave Kleikamp } 5506ac27a0ecSDave Kleikamp 55072d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 55082d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5509ac27a0ecSDave Kleikamp { 5510c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5511e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5512e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5513ac27a0ecSDave Kleikamp 551405c2c00fSJan Kara lock_buffer(sbh); 5515a17712c8SJon Derrick /* 551671290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 551771290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 551871290b36STheodore Ts'o * write time when we are mounting the root file system 551971290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 552071290b36STheodore Ts'o * for people who are east of GMT and who make their clock 552171290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 552271290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 552371290b36STheodore Ts'o * to complain and force a full file system check. 552471290b36STheodore Ts'o */ 55251751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 55266a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5527afc32f7eSTheodore Ts'o es->s_kbytes_written = 5528e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 55298446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5530e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5531e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 553257042651STheodore Ts'o ext4_free_blocks_count_set(es, 5533e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5534e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5535e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 55367f93cff9STheodore Ts'o es->s_free_inodes_count = 55377f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5538e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5539c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5540c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5541c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5542c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5543c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5544c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5545c92dc856SJan Kara &es->s_first_error_time_hi, 5546c92dc856SJan Kara sbi->s_first_error_time); 5547c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5548c92dc856SJan Kara sizeof(es->s_first_error_func)); 5549c92dc856SJan Kara es->s_first_error_line = 5550c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5551c92dc856SJan Kara es->s_first_error_ino = 5552c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5553c92dc856SJan Kara es->s_first_error_block = 5554c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5555c92dc856SJan Kara es->s_first_error_errcode = 5556c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5557c92dc856SJan Kara } 5558c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5559c92dc856SJan Kara &es->s_last_error_time_hi, 5560c92dc856SJan Kara sbi->s_last_error_time); 5561c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5562c92dc856SJan Kara sizeof(es->s_last_error_func)); 5563c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5564c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5565c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5566c92dc856SJan Kara es->s_last_error_errcode = 5567c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5568c92dc856SJan Kara /* 5569c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5570c92dc856SJan Kara * started already 5571c92dc856SJan Kara */ 5572c92dc856SJan Kara if (!es->s_error_count) 5573c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5574c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5575c92dc856SJan Kara sbi->s_add_error_count = 0; 5576c92dc856SJan Kara } 5577c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5578c92dc856SJan Kara 557906db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 55802d01ddc8SJan Kara unlock_buffer(sbh); 55812d01ddc8SJan Kara } 55822d01ddc8SJan Kara 55832d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 55842d01ddc8SJan Kara { 55852d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 55862d01ddc8SJan Kara int error = 0; 55872d01ddc8SJan Kara 5588*f88f1466SFengnan Chang if (!sbh) 5589*f88f1466SFengnan Chang return -EINVAL; 5590*f88f1466SFengnan Chang if (block_device_ejected(sb)) 5591*f88f1466SFengnan Chang return -ENODEV; 55922d01ddc8SJan Kara 55932d01ddc8SJan Kara ext4_update_super(sb); 55942d01ddc8SJan Kara 5595e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 55964743f839SPranay Kr. Srivastava /* 55974743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 55984743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 55994743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 56004743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 56014743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 56024743f839SPranay Kr. Srivastava * write and hope for the best. 56034743f839SPranay Kr. Srivastava */ 56044743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 56054743f839SPranay Kr. Srivastava "superblock detected"); 56064743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 56074743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 56084743f839SPranay Kr. Srivastava } 56092d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 5610ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5611564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 561200473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5613c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5614b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5615b31e1552SEric Sandeen "superblock"); 5616914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5617914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5618914258bfSTheodore Ts'o } 5619c4be0c1dSTakashi Sato return error; 5620ac27a0ecSDave Kleikamp } 5621ac27a0ecSDave Kleikamp 5622ac27a0ecSDave Kleikamp /* 5623ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5624ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5625ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5626ac27a0ecSDave Kleikamp */ 562711215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5628617ba13bSMingming Cao struct ext4_super_block *es) 5629ac27a0ecSDave Kleikamp { 563011215630SJan Kara int err; 5631617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5632ac27a0ecSDave Kleikamp 5633e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 563411215630SJan Kara if (journal != NULL) { 563511215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 563611215630SJan Kara "mounted!"); 563711215630SJan Kara return -EFSCORRUPTED; 563811215630SJan Kara } 563911215630SJan Kara return 0; 56400390131bSFrank Mayhar } 5641dab291afSMingming Cao jbd2_journal_lock_updates(journal); 564211215630SJan Kara err = jbd2_journal_flush(journal); 564311215630SJan Kara if (err < 0) 56447ffe1ea8SHidehiro Kawai goto out; 56457ffe1ea8SHidehiro Kawai 5646bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 5647e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 56484392fbc4SJan Kara ext4_commit_super(sb); 5649ac27a0ecSDave Kleikamp } 56507ffe1ea8SHidehiro Kawai out: 5651dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 565211215630SJan Kara return err; 5653ac27a0ecSDave Kleikamp } 5654ac27a0ecSDave Kleikamp 5655ac27a0ecSDave Kleikamp /* 5656ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5657ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 5658ac27a0ecSDave Kleikamp * main filesystem now. 5659ac27a0ecSDave Kleikamp */ 566011215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 5661617ba13bSMingming Cao struct ext4_super_block *es) 5662ac27a0ecSDave Kleikamp { 5663ac27a0ecSDave Kleikamp journal_t *journal; 5664ac27a0ecSDave Kleikamp int j_errno; 5665ac27a0ecSDave Kleikamp const char *errstr; 5666ac27a0ecSDave Kleikamp 566711215630SJan Kara if (!ext4_has_feature_journal(sb)) { 566811215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 566911215630SJan Kara return -EFSCORRUPTED; 567011215630SJan Kara } 56710390131bSFrank Mayhar 5672617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5673ac27a0ecSDave Kleikamp 5674ac27a0ecSDave Kleikamp /* 5675ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 5676617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 5677ac27a0ecSDave Kleikamp */ 5678ac27a0ecSDave Kleikamp 5679dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 5680ac27a0ecSDave Kleikamp if (j_errno) { 5681ac27a0ecSDave Kleikamp char nbuf[16]; 5682ac27a0ecSDave Kleikamp 5683617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 568412062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 5685ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 568612062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 5687ac27a0ecSDave Kleikamp 5688617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5689617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 56904392fbc4SJan Kara ext4_commit_super(sb); 5691ac27a0ecSDave Kleikamp 5692dab291afSMingming Cao jbd2_journal_clear_err(journal); 5693d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 5694ac27a0ecSDave Kleikamp } 569511215630SJan Kara return 0; 5696ac27a0ecSDave Kleikamp } 5697ac27a0ecSDave Kleikamp 5698ac27a0ecSDave Kleikamp /* 5699ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 5700ac27a0ecSDave Kleikamp * and wait on the commit. 5701ac27a0ecSDave Kleikamp */ 5702617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 5703ac27a0ecSDave Kleikamp { 5704ac27a0ecSDave Kleikamp journal_t *journal; 5705ac27a0ecSDave Kleikamp 5706bc98a42cSDavid Howells if (sb_rdonly(sb)) 5707ac27a0ecSDave Kleikamp return 0; 5708ac27a0ecSDave Kleikamp 5709617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5710b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 5711ac27a0ecSDave Kleikamp } 5712ac27a0ecSDave Kleikamp 5713617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 5714ac27a0ecSDave Kleikamp { 571514ce0cb4STheodore Ts'o int ret = 0; 57169eddacf9SJan Kara tid_t target; 571706a407f1SDmitry Monakhov bool needs_barrier = false; 57188d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5719ac27a0ecSDave Kleikamp 572049598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 57210db1ff22STheodore Ts'o return 0; 57220db1ff22STheodore Ts'o 57239bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 57242e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 5725a1177825SJan Kara /* 5726a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 5727a1177825SJan Kara * no dirty dquots 5728a1177825SJan Kara */ 5729a1177825SJan Kara dquot_writeback_dquots(sb, -1); 573006a407f1SDmitry Monakhov /* 573106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 573206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 573306a407f1SDmitry Monakhov * transaction_commit will do it for us. 573406a407f1SDmitry Monakhov */ 5735bda32530STheodore Ts'o if (sbi->s_journal) { 573606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 573706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 573806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 573906a407f1SDmitry Monakhov needs_barrier = true; 574006a407f1SDmitry Monakhov 57418d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 5742ac27a0ecSDave Kleikamp if (wait) 5743bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 5744bda32530STheodore Ts'o target); 57450390131bSFrank Mayhar } 5746bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5747bda32530STheodore Ts'o needs_barrier = true; 574806a407f1SDmitry Monakhov if (needs_barrier) { 574906a407f1SDmitry Monakhov int err; 5750c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 575106a407f1SDmitry Monakhov if (!ret) 575206a407f1SDmitry Monakhov ret = err; 575306a407f1SDmitry Monakhov } 575406a407f1SDmitry Monakhov 575506a407f1SDmitry Monakhov return ret; 575606a407f1SDmitry Monakhov } 575706a407f1SDmitry Monakhov 5758ac27a0ecSDave Kleikamp /* 5759ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5760ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5761be4f27d3SYongqiang Yang * 5762be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 57638e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 57648e8ad8a5SJan Kara * modifications. 5765ac27a0ecSDave Kleikamp */ 5766c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5767ac27a0ecSDave Kleikamp { 5768c4be0c1dSTakashi Sato int error = 0; 5769c4be0c1dSTakashi Sato journal_t *journal; 5770ac27a0ecSDave Kleikamp 5771bc98a42cSDavid Howells if (sb_rdonly(sb)) 57729ca92389STheodore Ts'o return 0; 57739ca92389STheodore Ts'o 5774c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5775ac27a0ecSDave Kleikamp 5776bb044576STheodore Ts'o if (journal) { 5777ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5778dab291afSMingming Cao jbd2_journal_lock_updates(journal); 57797ffe1ea8SHidehiro Kawai 57807ffe1ea8SHidehiro Kawai /* 5781bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5782bb044576STheodore Ts'o * flush the journal. 57837ffe1ea8SHidehiro Kawai */ 5784c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 57856b0310fbSEric Sandeen if (error < 0) 57866b0310fbSEric Sandeen goto out; 5787ac27a0ecSDave Kleikamp 5788ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5789e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5790c642dc9eSEric Sandeen } 5791c642dc9eSEric Sandeen 57924392fbc4SJan Kara error = ext4_commit_super(sb); 57936b0310fbSEric Sandeen out: 5794bb044576STheodore Ts'o if (journal) 57958e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5796bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 57976b0310fbSEric Sandeen return error; 5798ac27a0ecSDave Kleikamp } 5799ac27a0ecSDave Kleikamp 5800ac27a0ecSDave Kleikamp /* 5801ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5802ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5803ac27a0ecSDave Kleikamp */ 5804c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5805ac27a0ecSDave Kleikamp { 5806bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 58079ca92389STheodore Ts'o return 0; 58089ca92389STheodore Ts'o 5809c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 58109ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5811e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 5812c642dc9eSEric Sandeen } 5813c642dc9eSEric Sandeen 58144392fbc4SJan Kara ext4_commit_super(sb); 5815c4be0c1dSTakashi Sato return 0; 5816ac27a0ecSDave Kleikamp } 5817ac27a0ecSDave Kleikamp 5818673c6100STheodore Ts'o /* 5819673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5820673c6100STheodore Ts'o */ 5821673c6100STheodore Ts'o struct ext4_mount_options { 5822673c6100STheodore Ts'o unsigned long s_mount_opt; 5823a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 582408cefc7aSEric W. Biederman kuid_t s_resuid; 582508cefc7aSEric W. Biederman kgid_t s_resgid; 5826673c6100STheodore Ts'o unsigned long s_commit_interval; 5827673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5828673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5829673c6100STheodore Ts'o int s_jquota_fmt; 5830a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5831673c6100STheodore Ts'o #endif 5832673c6100STheodore Ts'o }; 5833673c6100STheodore Ts'o 5834617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5835ac27a0ecSDave Kleikamp { 5836617ba13bSMingming Cao struct ext4_super_block *es; 5837617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5838f25391ebSLukas Czerner unsigned long old_sb_flags, vfs_flags; 5839617ba13bSMingming Cao struct ext4_mount_options old_opts; 5840c79d967dSChristoph Hellwig int enable_quota = 0; 58418a266467STheodore Ts'o ext4_group_t g; 5842c5e06d10SJohann Lombardi int err = 0; 5843ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 584403dafb5fSChen Gang int i, j; 584533458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 5846ac27a0ecSDave Kleikamp #endif 5847d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5848b237e304SHarshad Shirwadkar struct ext4_parsed_options parsed_opts; 5849b237e304SHarshad Shirwadkar 5850b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5851b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 5852ac27a0ecSDave Kleikamp 585321ac738eSChengguang Xu if (data && !orig_data) 585421ac738eSChengguang Xu return -ENOMEM; 585521ac738eSChengguang Xu 5856ac27a0ecSDave Kleikamp /* Store the original options */ 5857ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5858ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5859a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5860ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5861ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5862ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 586330773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 586430773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5865ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5866ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5867a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 586803dafb5fSChen Gang if (sbi->s_qf_names[i]) { 586933458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 587033458eabSTheodore Ts'o 587133458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 587203dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 587303dafb5fSChen Gang for (j = 0; j < i; j++) 587403dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 58753e36a163SWei Yongjun kfree(orig_data); 587603dafb5fSChen Gang return -ENOMEM; 587703dafb5fSChen Gang } 587803dafb5fSChen Gang } else 587903dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5880ac27a0ecSDave Kleikamp #endif 5881b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5882b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = 5883b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 5884ac27a0ecSDave Kleikamp 5885f25391ebSLukas Czerner /* 5886f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 5887f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 5888f25391ebSLukas Czerner * s_flags. Copy those selected flags from *flags to s_flags 5889f25391ebSLukas Czerner */ 5890f25391ebSLukas Czerner vfs_flags = SB_LAZYTIME | SB_I_VERSION; 5891f25391ebSLukas Czerner sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags); 5892f25391ebSLukas Czerner 5893b237e304SHarshad Shirwadkar if (!parse_options(data, sb, &parsed_opts, 1)) { 5894ac27a0ecSDave Kleikamp err = -EINVAL; 5895ac27a0ecSDave Kleikamp goto restore_opts; 5896ac27a0ecSDave Kleikamp } 5897ac27a0ecSDave Kleikamp 58986b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 58996b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 59006b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 59012d5b86e0SEric Sandeen "during remount not supported; ignoring"); 59022d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5903c6d3d56dSDarrick J. Wong } 5904c6d3d56dSDarrick J. Wong 59056ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 59066ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 59076ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 59086ae6514bSPiotr Sarna "both data=journal and delalloc"); 59096ae6514bSPiotr Sarna err = -EINVAL; 59106ae6514bSPiotr Sarna goto restore_opts; 59116ae6514bSPiotr Sarna } 59126ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 59136ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 59146ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 59156ae6514bSPiotr Sarna err = -EINVAL; 59166ae6514bSPiotr Sarna goto restore_opts; 59176ae6514bSPiotr Sarna } 5918ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5919ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5920ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5921ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5922ab04df78SJan Kara err = -EINVAL; 5923ab04df78SJan Kara goto restore_opts; 5924ab04df78SJan Kara } 5925923ae0ffSRoss Zwisler } 5926923ae0ffSRoss Zwisler 5927cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5928cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5929cdb7ee4cSTahsin Erdogan err = -EINVAL; 5930cdb7ee4cSTahsin Erdogan goto restore_opts; 5931cdb7ee4cSTahsin Erdogan } 5932cdb7ee4cSTahsin Erdogan 59339b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 593454d3adbcSTheodore Ts'o ext4_abort(sb, EXT4_ERR_ESHUTDOWN, "Abort forced by user"); 5935ac27a0ecSDave Kleikamp 59361751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 59371751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5938ac27a0ecSDave Kleikamp 5939ac27a0ecSDave Kleikamp es = sbi->s_es; 5940ac27a0ecSDave Kleikamp 5941b3881f74STheodore Ts'o if (sbi->s_journal) { 5942617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5943b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 5944b3881f74STheodore Ts'o } 5945ac27a0ecSDave Kleikamp 5946c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 5947c92dc856SJan Kara flush_work(&sbi->s_error_work); 5948c92dc856SJan Kara 59491751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 59509b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 5951ac27a0ecSDave Kleikamp err = -EROFS; 5952ac27a0ecSDave Kleikamp goto restore_opts; 5953ac27a0ecSDave Kleikamp } 5954ac27a0ecSDave Kleikamp 59551751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 595638c03b34STheodore Ts'o err = sync_filesystem(sb); 595738c03b34STheodore Ts'o if (err < 0) 595838c03b34STheodore Ts'o goto restore_opts; 59590f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 59600f0dd62fSChristoph Hellwig if (err < 0) 5961c79d967dSChristoph Hellwig goto restore_opts; 5962c79d967dSChristoph Hellwig 5963ac27a0ecSDave Kleikamp /* 5964ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5965ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5966ac27a0ecSDave Kleikamp */ 59671751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5968ac27a0ecSDave Kleikamp 5969ac27a0ecSDave Kleikamp /* 5970ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5971ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5972ac27a0ecSDave Kleikamp * mark the partition as valid again. 5973ac27a0ecSDave Kleikamp */ 5974617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5975617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5976ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5977ac27a0ecSDave Kleikamp 597811215630SJan Kara if (sbi->s_journal) { 597911215630SJan Kara /* 598011215630SJan Kara * We let remount-ro finish even if marking fs 598111215630SJan Kara * as clean failed... 598211215630SJan Kara */ 5983617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 598411215630SJan Kara } 59852dca60d9STheodore Ts'o if (sbi->s_mmp_tsk) 59862dca60d9STheodore Ts'o kthread_stop(sbi->s_mmp_tsk); 5987ac27a0ecSDave Kleikamp } else { 5988a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5989e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 59902cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5991ac27a0ecSDave Kleikamp err = -EROFS; 5992ac27a0ecSDave Kleikamp goto restore_opts; 5993ac27a0ecSDave Kleikamp } 5994ead6596bSEric Sandeen /* 59958a266467STheodore Ts'o * Make sure the group descriptor checksums 59960b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 59978a266467STheodore Ts'o */ 59988a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 59998a266467STheodore Ts'o struct ext4_group_desc *gdp = 60008a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 60018a266467STheodore Ts'o 6002feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6003b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6004b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6005e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 60068a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 60076a797d27SDarrick J. Wong err = -EFSBADCRC; 60088a266467STheodore Ts'o goto restore_opts; 60098a266467STheodore Ts'o } 60108a266467STheodore Ts'o } 60118a266467STheodore Ts'o 60128a266467STheodore Ts'o /* 6013ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6014ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6015ead6596bSEric Sandeen * require a full umount/remount for now. 6016ead6596bSEric Sandeen */ 6017ead6596bSEric Sandeen if (es->s_last_orphan) { 6018b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6019ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6020ead6596bSEric Sandeen "orphan inode list. Please " 6021b31e1552SEric Sandeen "umount/remount instead"); 6022ead6596bSEric Sandeen err = -EINVAL; 6023ead6596bSEric Sandeen goto restore_opts; 6024ead6596bSEric Sandeen } 6025ead6596bSEric Sandeen 6026ac27a0ecSDave Kleikamp /* 6027ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6028ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6029ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6030ac27a0ecSDave Kleikamp * the partition.) 6031ac27a0ecSDave Kleikamp */ 603211215630SJan Kara if (sbi->s_journal) { 603311215630SJan Kara err = ext4_clear_journal_err(sb, es); 603411215630SJan Kara if (err) 603511215630SJan Kara goto restore_opts; 603611215630SJan Kara } 6037ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6038c89128a0SJaegeuk Kim 6039c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6040c89128a0SJaegeuk Kim if (err) 6041c89128a0SJaegeuk Kim goto restore_opts; 6042c89128a0SJaegeuk Kim 60431751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6044e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6045c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6046c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6047c5e06d10SJohann Lombardi err = -EROFS; 6048c5e06d10SJohann Lombardi goto restore_opts; 6049c5e06d10SJohann Lombardi } 6050c79d967dSChristoph Hellwig enable_quota = 1; 6051ac27a0ecSDave Kleikamp } 6052ac27a0ecSDave Kleikamp } 6053bfff6873SLukas Czerner 6054bfff6873SLukas Czerner /* 6055bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6056bfff6873SLukas Czerner * current settings 6057bfff6873SLukas Czerner */ 6058bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6059bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6060bfff6873SLukas Czerner else { 6061bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6062bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6063bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6064bfff6873SLukas Czerner } 6065bfff6873SLukas Czerner 60660f5bde1dSJan Kara /* 60670f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 60680f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 60690f5bde1dSJan Kara * succeed. 60700f5bde1dSJan Kara */ 6071dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6072d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6073d176b1f6SJan Kara if (err) 6074d176b1f6SJan Kara goto restore_opts; 60750f5bde1dSJan Kara } 6076d176b1f6SJan Kara 6077c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 60784392fbc4SJan Kara err = ext4_commit_super(sb); 6079c89128a0SJaegeuk Kim if (err) 6080c89128a0SJaegeuk Kim goto restore_opts; 6081c89128a0SJaegeuk Kim } 60820390131bSFrank Mayhar 6083ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6084ac27a0ecSDave Kleikamp /* Release old quota file names */ 6085a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6086ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 60877c319d32SAditya Kali if (enable_quota) { 60887c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 60890f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6090e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 60917c319d32SAditya Kali err = ext4_enable_quotas(sb); 609207724f98STheodore Ts'o if (err) 60937c319d32SAditya Kali goto restore_opts; 60947c319d32SAditya Kali } 60957c319d32SAditya Kali } 60967c319d32SAditya Kali #endif 6097dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 60980f5bde1dSJan Kara ext4_release_system_zone(sb); 6099d4c402d9SCurt Wohlgemuth 6100f25391ebSLukas Czerner /* 6101f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6102f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6103f25391ebSLukas Czerner * s_flags. Copy those selected flags from s_flags to *flags 6104f25391ebSLukas Czerner */ 6105f25391ebSLukas Czerner *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags); 6106f25391ebSLukas Czerner 6107ca9b404fSRoman Anufriev ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.", 6108ca9b404fSRoman Anufriev orig_data, ext4_quota_mode(sb)); 6109d4c402d9SCurt Wohlgemuth kfree(orig_data); 6110ac27a0ecSDave Kleikamp return 0; 61110b8e58a1SAndreas Dilger 6112ac27a0ecSDave Kleikamp restore_opts: 6113ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6114ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6115a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6116ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6117ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6118ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 611930773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 612030773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6121dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 61220f5bde1dSJan Kara ext4_release_system_zone(sb); 6123ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6124ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6125a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 612633458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 612733458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6128ac27a0ecSDave Kleikamp } 612933458eabSTheodore Ts'o synchronize_rcu(); 613033458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 613133458eabSTheodore Ts'o kfree(to_free[i]); 6132ac27a0ecSDave Kleikamp #endif 6133d4c402d9SCurt Wohlgemuth kfree(orig_data); 6134ac27a0ecSDave Kleikamp return err; 6135ac27a0ecSDave Kleikamp } 6136ac27a0ecSDave Kleikamp 6137689c958cSLi Xi #ifdef CONFIG_QUOTA 6138689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6139689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6140689c958cSLi Xi { 6141689c958cSLi Xi struct kqid qid; 6142689c958cSLi Xi struct dquot *dquot; 6143689c958cSLi Xi u64 limit; 6144689c958cSLi Xi u64 curblock; 6145689c958cSLi Xi 6146689c958cSLi Xi qid = make_kqid_projid(projid); 6147689c958cSLi Xi dquot = dqget(sb, qid); 6148689c958cSLi Xi if (IS_ERR(dquot)) 6149689c958cSLi Xi return PTR_ERR(dquot); 61507b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6151689c958cSLi Xi 6152a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6153a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 615457c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 615557c32ea4SChengguang Xu 6156689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6157f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6158f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6159689c958cSLi Xi buf->f_blocks = limit; 6160689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6161689c958cSLi Xi (buf->f_blocks > curblock) ? 6162689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6163689c958cSLi Xi } 6164689c958cSLi Xi 6165a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6166a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6167689c958cSLi Xi if (limit && buf->f_files > limit) { 6168689c958cSLi Xi buf->f_files = limit; 6169689c958cSLi Xi buf->f_ffree = 6170689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6171689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6172689c958cSLi Xi } 6173689c958cSLi Xi 61747b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6175689c958cSLi Xi dqput(dquot); 6176689c958cSLi Xi return 0; 6177689c958cSLi Xi } 6178689c958cSLi Xi #endif 6179689c958cSLi Xi 6180617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6181ac27a0ecSDave Kleikamp { 6182ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6183617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6184617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 618527dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6186960cc398SPekka Enberg u64 fsid; 6187d02a9391SKazuya Mio s64 bfree; 618827dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6189ac27a0ecSDave Kleikamp 6190952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6191952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6192ac27a0ecSDave Kleikamp 6193617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6194ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6195b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 619657042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 619757042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6198d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 619957042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 620027dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 620127dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 620227dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6203ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6204ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 620552d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6206617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 6207960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 6208960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 62096d1349c7SAl Viro buf->f_fsid = u64_to_fsid(fsid); 62100b8e58a1SAndreas Dilger 6211689c958cSLi Xi #ifdef CONFIG_QUOTA 6212689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6213689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6214689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6215689c958cSLi Xi #endif 6216ac27a0ecSDave Kleikamp return 0; 6217ac27a0ecSDave Kleikamp } 6218ac27a0ecSDave Kleikamp 6219ac27a0ecSDave Kleikamp 6220ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6221ac27a0ecSDave Kleikamp 6222bc8230eeSJan Kara /* 6223bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6224bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6225bc8230eeSJan Kara */ 6226ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6227ac27a0ecSDave Kleikamp { 62284c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6229ac27a0ecSDave Kleikamp } 6230ac27a0ecSDave Kleikamp 6231617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6232ac27a0ecSDave Kleikamp { 6233ac27a0ecSDave Kleikamp int ret, err; 6234ac27a0ecSDave Kleikamp handle_t *handle; 6235ac27a0ecSDave Kleikamp struct inode *inode; 6236ac27a0ecSDave Kleikamp 6237ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 62389924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6239617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6240ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6241ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6242ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6243617ba13bSMingming Cao err = ext4_journal_stop(handle); 6244ac27a0ecSDave Kleikamp if (!ret) 6245ac27a0ecSDave Kleikamp ret = err; 6246ac27a0ecSDave Kleikamp return ret; 6247ac27a0ecSDave Kleikamp } 6248ac27a0ecSDave Kleikamp 6249617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6250ac27a0ecSDave Kleikamp { 6251ac27a0ecSDave Kleikamp int ret, err; 6252ac27a0ecSDave Kleikamp handle_t *handle; 6253ac27a0ecSDave Kleikamp 62549924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6255617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6256ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6257ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6258ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6259617ba13bSMingming Cao err = ext4_journal_stop(handle); 6260ac27a0ecSDave Kleikamp if (!ret) 6261ac27a0ecSDave Kleikamp ret = err; 6262ac27a0ecSDave Kleikamp return ret; 6263ac27a0ecSDave Kleikamp } 6264ac27a0ecSDave Kleikamp 6265617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6266ac27a0ecSDave Kleikamp { 6267ac27a0ecSDave Kleikamp int ret, err; 6268ac27a0ecSDave Kleikamp handle_t *handle; 6269ac27a0ecSDave Kleikamp 62709924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6271617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 62729c3013e9SJan Kara if (IS_ERR(handle)) { 62739c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 62749c3013e9SJan Kara dquot_release(dquot); 6275ac27a0ecSDave Kleikamp return PTR_ERR(handle); 62769c3013e9SJan Kara } 6277ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6278617ba13bSMingming Cao err = ext4_journal_stop(handle); 6279ac27a0ecSDave Kleikamp if (!ret) 6280ac27a0ecSDave Kleikamp ret = err; 6281ac27a0ecSDave Kleikamp return ret; 6282ac27a0ecSDave Kleikamp } 6283ac27a0ecSDave Kleikamp 6284617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6285ac27a0ecSDave Kleikamp { 6286262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6287262b4662SJan Kara 6288f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6289ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6290617ba13bSMingming Cao return ext4_write_dquot(dquot); 6291ac27a0ecSDave Kleikamp } else { 6292ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6293ac27a0ecSDave Kleikamp } 6294ac27a0ecSDave Kleikamp } 6295ac27a0ecSDave Kleikamp 6296617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6297ac27a0ecSDave Kleikamp { 6298ac27a0ecSDave Kleikamp int ret, err; 6299ac27a0ecSDave Kleikamp handle_t *handle; 6300ac27a0ecSDave Kleikamp 6301ac27a0ecSDave Kleikamp /* Data block + inode block */ 63022b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6303ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6304ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6305ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6306617ba13bSMingming Cao err = ext4_journal_stop(handle); 6307ac27a0ecSDave Kleikamp if (!ret) 6308ac27a0ecSDave Kleikamp ret = err; 6309ac27a0ecSDave Kleikamp return ret; 6310ac27a0ecSDave Kleikamp } 6311ac27a0ecSDave Kleikamp 6312ac27a0ecSDave Kleikamp /* 6313ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 6314ac27a0ecSDave Kleikamp * the quota file and such... 6315ac27a0ecSDave Kleikamp */ 6316617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 6317ac27a0ecSDave Kleikamp { 631833458eabSTheodore Ts'o return dquot_quota_on_mount(sb, get_qf_name(sb, EXT4_SB(sb), type), 6319617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 6320ac27a0ecSDave Kleikamp } 6321ac27a0ecSDave Kleikamp 6322daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6323daf647d2STheodore Ts'o { 6324daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6325daf647d2STheodore Ts'o 6326daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6327daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6328daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6329daf647d2STheodore Ts'o * because the name of the lock is set using the 6330daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6331daf647d2STheodore Ts'o */ 6332daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6333daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6334daf647d2STheodore Ts'o } 6335daf647d2STheodore Ts'o 6336ac27a0ecSDave Kleikamp /* 6337ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6338ac27a0ecSDave Kleikamp */ 6339617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 63408c54ca9cSAl Viro const struct path *path) 6341ac27a0ecSDave Kleikamp { 6342ac27a0ecSDave Kleikamp int err; 6343ac27a0ecSDave Kleikamp 6344ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6345ac27a0ecSDave Kleikamp return -EINVAL; 63460623543bSJan Kara 6347ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6348d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6349ac27a0ecSDave Kleikamp return -EXDEV; 6350e0770e91SJan Kara 6351e0770e91SJan Kara /* Quota already enabled for this file? */ 6352e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6353e0770e91SJan Kara return -EBUSY; 6354e0770e91SJan Kara 63550623543bSJan Kara /* Journaling quota? */ 63560623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 63572b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6358f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6359b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6360b31e1552SEric Sandeen "Quota file not on filesystem root. " 6361b31e1552SEric Sandeen "Journaled quota will not work"); 636291389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 636391389240SJan Kara } else { 636491389240SJan Kara /* 636591389240SJan Kara * Clear the flag just in case mount options changed since 636691389240SJan Kara * last time. 636791389240SJan Kara */ 636891389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 63690623543bSJan Kara } 63700623543bSJan Kara 63710623543bSJan Kara /* 63720623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 63730623543bSJan Kara * all updates to the file when we bypass pagecache... 63740623543bSJan Kara */ 63750390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 63762b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 63770623543bSJan Kara /* 63780623543bSJan Kara * We don't need to lock updates but journal_flush() could 63790623543bSJan Kara * otherwise be livelocked... 63800623543bSJan Kara */ 63810623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 63827ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 63830623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6384f00c9e44SJan Kara if (err) 63857ffe1ea8SHidehiro Kawai return err; 63867ffe1ea8SHidehiro Kawai } 6387957153fcSJan Kara 6388daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6389daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6390957153fcSJan Kara if (err) { 6391daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6392daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6393957153fcSJan Kara } else { 6394957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6395957153fcSJan Kara handle_t *handle; 6396957153fcSJan Kara 639761a92987SJan Kara /* 639861a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 639961a92987SJan Kara * files. If this fails, we return success anyway since quotas 640061a92987SJan Kara * are already enabled and this is not a hard failure. 640161a92987SJan Kara */ 6402957153fcSJan Kara inode_lock(inode); 6403957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6404957153fcSJan Kara if (IS_ERR(handle)) 6405957153fcSJan Kara goto unlock_inode; 6406957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6407957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6408957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 64094209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6410957153fcSJan Kara ext4_journal_stop(handle); 6411957153fcSJan Kara unlock_inode: 6412957153fcSJan Kara inode_unlock(inode); 6413957153fcSJan Kara } 6414daf647d2STheodore Ts'o return err; 6415ac27a0ecSDave Kleikamp } 6416ac27a0ecSDave Kleikamp 64177c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 64187c319d32SAditya Kali unsigned int flags) 64197c319d32SAditya Kali { 64207c319d32SAditya Kali int err; 64217c319d32SAditya Kali struct inode *qf_inode; 6422a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 64237c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6424689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6425689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 64267c319d32SAditya Kali }; 64277c319d32SAditya Kali 6428e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 64297c319d32SAditya Kali 64307c319d32SAditya Kali if (!qf_inums[type]) 64317c319d32SAditya Kali return -EPERM; 64327c319d32SAditya Kali 64338a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 64347c319d32SAditya Kali if (IS_ERR(qf_inode)) { 64357c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 64367c319d32SAditya Kali return PTR_ERR(qf_inode); 64377c319d32SAditya Kali } 64387c319d32SAditya Kali 6439bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6440bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6441daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 64427212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6443daf647d2STheodore Ts'o if (err) 6444daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 644561157b24SPan Bian iput(qf_inode); 64467c319d32SAditya Kali 64477c319d32SAditya Kali return err; 64487c319d32SAditya Kali } 64497c319d32SAditya Kali 64507c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 64517c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 64527c319d32SAditya Kali { 64537c319d32SAditya Kali int type, err = 0; 6454a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 64557c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6456689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6457689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 64587c319d32SAditya Kali }; 645949da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 646049da9392SJan Kara test_opt(sb, USRQUOTA), 646149da9392SJan Kara test_opt(sb, GRPQUOTA), 646249da9392SJan Kara test_opt(sb, PRJQUOTA), 646349da9392SJan Kara }; 64647c319d32SAditya Kali 646591389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6466a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 64677c319d32SAditya Kali if (qf_inums[type]) { 64687c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 646949da9392SJan Kara DQUOT_USAGE_ENABLED | 647049da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 64717c319d32SAditya Kali if (err) { 64727c319d32SAditya Kali ext4_warning(sb, 647372ba7450STheodore Ts'o "Failed to enable quota tracking " 647472ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 647572ba7450STheodore Ts'o "e2fsck to fix.", type, err); 64767f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 64777f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 64787f144fd0SJunichi Uekawa 64797c319d32SAditya Kali return err; 64807c319d32SAditya Kali } 64817c319d32SAditya Kali } 64827c319d32SAditya Kali } 64837c319d32SAditya Kali return 0; 64847c319d32SAditya Kali } 64857c319d32SAditya Kali 6486ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6487ca0e05e4SDmitry Monakhov { 648821f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 648921f97697SJan Kara handle_t *handle; 6490957153fcSJan Kara int err; 649121f97697SJan Kara 649287009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 649387009d86SDmitry Monakhov * Caller already holds s_umount sem */ 649487009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6495ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6496ca0e05e4SDmitry Monakhov 6497957153fcSJan Kara if (!inode || !igrab(inode)) 64980b268590SAmir Goldstein goto out; 64990b268590SAmir Goldstein 6500957153fcSJan Kara err = dquot_quota_off(sb, type); 6501964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6502957153fcSJan Kara goto out_put; 6503957153fcSJan Kara 6504957153fcSJan Kara inode_lock(inode); 650561a92987SJan Kara /* 650661a92987SJan Kara * Update modification times of quota files when userspace can 650761a92987SJan Kara * start looking at them. If we fail, we return success anyway since 650861a92987SJan Kara * this is not a hard failure and quotas are already disabled. 650961a92987SJan Kara */ 65109924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 65114209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 65124209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6513957153fcSJan Kara goto out_unlock; 65144209ae12SHarshad Shirwadkar } 6515957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6516957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6517eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 65184209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 651921f97697SJan Kara ext4_journal_stop(handle); 6520957153fcSJan Kara out_unlock: 6521957153fcSJan Kara inode_unlock(inode); 6522957153fcSJan Kara out_put: 6523964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6524957153fcSJan Kara iput(inode); 6525957153fcSJan Kara return err; 652621f97697SJan Kara out: 6527ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6528ca0e05e4SDmitry Monakhov } 6529ca0e05e4SDmitry Monakhov 6530ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6531ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6532ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6533ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6534617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6535ac27a0ecSDave Kleikamp size_t len, loff_t off) 6536ac27a0ecSDave Kleikamp { 6537ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6538725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6539ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6540ac27a0ecSDave Kleikamp int tocopy; 6541ac27a0ecSDave Kleikamp size_t toread; 6542ac27a0ecSDave Kleikamp struct buffer_head *bh; 6543ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6544ac27a0ecSDave Kleikamp 6545ac27a0ecSDave Kleikamp if (off > i_size) 6546ac27a0ecSDave Kleikamp return 0; 6547ac27a0ecSDave Kleikamp if (off+len > i_size) 6548ac27a0ecSDave Kleikamp len = i_size-off; 6549ac27a0ecSDave Kleikamp toread = len; 6550ac27a0ecSDave Kleikamp while (toread > 0) { 6551ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6552ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 65531c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 65541c215028STheodore Ts'o if (IS_ERR(bh)) 65551c215028STheodore Ts'o return PTR_ERR(bh); 6556ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6557ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6558ac27a0ecSDave Kleikamp else 6559ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6560ac27a0ecSDave Kleikamp brelse(bh); 6561ac27a0ecSDave Kleikamp offset = 0; 6562ac27a0ecSDave Kleikamp toread -= tocopy; 6563ac27a0ecSDave Kleikamp data += tocopy; 6564ac27a0ecSDave Kleikamp blk++; 6565ac27a0ecSDave Kleikamp } 6566ac27a0ecSDave Kleikamp return len; 6567ac27a0ecSDave Kleikamp } 6568ac27a0ecSDave Kleikamp 6569ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6570ac27a0ecSDave Kleikamp * enough credits) */ 6571617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6572ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6573ac27a0ecSDave Kleikamp { 6574ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6575725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 65764209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6577c5e298aeSTheodore Ts'o int retries = 0; 6578ac27a0ecSDave Kleikamp struct buffer_head *bh; 6579ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6580ac27a0ecSDave Kleikamp 65810390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 6582b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6583b31e1552SEric Sandeen " cancelled because transaction is not started", 65849c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 65859c3013e9SJan Kara return -EIO; 65869c3013e9SJan Kara } 658767eeb568SDmitry Monakhov /* 658867eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 658967eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 659067eeb568SDmitry Monakhov */ 659167eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 659267eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 659367eeb568SDmitry Monakhov " cancelled because not block aligned", 659467eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 659567eeb568SDmitry Monakhov return -EIO; 659667eeb568SDmitry Monakhov } 659767eeb568SDmitry Monakhov 6598c5e298aeSTheodore Ts'o do { 6599c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6600c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6601c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 660245586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6603c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 66041c215028STheodore Ts'o if (IS_ERR(bh)) 66051c215028STheodore Ts'o return PTR_ERR(bh); 6606ac27a0ecSDave Kleikamp if (!bh) 6607ac27a0ecSDave Kleikamp goto out; 66085d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6609617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 6610ac27a0ecSDave Kleikamp if (err) { 6611ac27a0ecSDave Kleikamp brelse(bh); 66121c215028STheodore Ts'o return err; 6613ac27a0ecSDave Kleikamp } 6614ac27a0ecSDave Kleikamp lock_buffer(bh); 661567eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6616ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6617ac27a0ecSDave Kleikamp unlock_buffer(bh); 66180390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6619ac27a0ecSDave Kleikamp brelse(bh); 6620ac27a0ecSDave Kleikamp out: 662167eeb568SDmitry Monakhov if (inode->i_size < off + len) { 662267eeb568SDmitry Monakhov i_size_write(inode, off + len); 6623617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 66244209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 66254209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 66264209ae12SHarshad Shirwadkar err = err2; 662721f97697SJan Kara } 66284209ae12SHarshad Shirwadkar return err ? err : len; 6629ac27a0ecSDave Kleikamp } 6630ac27a0ecSDave Kleikamp #endif 6631ac27a0ecSDave Kleikamp 6632152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 6633152a0836SAl Viro const char *dev_name, void *data) 6634ac27a0ecSDave Kleikamp { 6635152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 6636ac27a0ecSDave Kleikamp } 6637ac27a0ecSDave Kleikamp 6638c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 663924b58424STheodore Ts'o static inline void register_as_ext2(void) 664024b58424STheodore Ts'o { 664124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 664224b58424STheodore Ts'o if (err) 664324b58424STheodore Ts'o printk(KERN_WARNING 664424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 664524b58424STheodore Ts'o } 664624b58424STheodore Ts'o 664724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 664824b58424STheodore Ts'o { 664924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 665024b58424STheodore Ts'o } 66512035e776STheodore Ts'o 66522035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 66532035e776STheodore Ts'o { 6654e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 66552035e776STheodore Ts'o return 0; 6656bc98a42cSDavid Howells if (sb_rdonly(sb)) 66572035e776STheodore Ts'o return 1; 6658e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 66592035e776STheodore Ts'o return 0; 66602035e776STheodore Ts'o return 1; 66612035e776STheodore Ts'o } 666224b58424STheodore Ts'o #else 666324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 666424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 66652035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 666624b58424STheodore Ts'o #endif 666724b58424STheodore Ts'o 666824b58424STheodore Ts'o static inline void register_as_ext3(void) 666924b58424STheodore Ts'o { 667024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 667124b58424STheodore Ts'o if (err) 667224b58424STheodore Ts'o printk(KERN_WARNING 667324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 667424b58424STheodore Ts'o } 667524b58424STheodore Ts'o 667624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 667724b58424STheodore Ts'o { 667824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 667924b58424STheodore Ts'o } 66802035e776STheodore Ts'o 66812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 66822035e776STheodore Ts'o { 6683e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 66842035e776STheodore Ts'o return 0; 6685e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 66862035e776STheodore Ts'o return 0; 6687bc98a42cSDavid Howells if (sb_rdonly(sb)) 66882035e776STheodore Ts'o return 1; 6689e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 66902035e776STheodore Ts'o return 0; 66912035e776STheodore Ts'o return 1; 66922035e776STheodore Ts'o } 669324b58424STheodore Ts'o 669403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 6695ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 669603010a33STheodore Ts'o .name = "ext4", 6697152a0836SAl Viro .mount = ext4_mount, 6698ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 669914f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 6700ac27a0ecSDave Kleikamp }; 67017f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 6702ac27a0ecSDave Kleikamp 6703e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 6704e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 6705e9e3bcecSEric Sandeen 67065dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 6707ac27a0ecSDave Kleikamp { 6708e9e3bcecSEric Sandeen int i, err; 6709c9de560dSAlex Tomas 6710e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 671107c0c5d8SAl Viro ext4_li_info = NULL; 671207c0c5d8SAl Viro 67139a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 671412e9b892SDmitry Monakhov ext4_check_flag_values(); 6715e9e3bcecSEric Sandeen 6716e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 6717e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 6718e9e3bcecSEric Sandeen 671951865fdaSZheng Liu err = ext4_init_es(); 67206fd058f7STheodore Ts'o if (err) 67216fd058f7STheodore Ts'o return err; 672251865fdaSZheng Liu 67231dc0aa46SEric Whitney err = ext4_init_pending(); 67241dc0aa46SEric Whitney if (err) 672522cfe4b4SEric Biggers goto out7; 672622cfe4b4SEric Biggers 672722cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 672822cfe4b4SEric Biggers if (err) 67291dc0aa46SEric Whitney goto out6; 67301dc0aa46SEric Whitney 673151865fdaSZheng Liu err = ext4_init_pageio(); 673251865fdaSZheng Liu if (err) 6733b5799018STheodore Ts'o goto out5; 673451865fdaSZheng Liu 67355dabfc78STheodore Ts'o err = ext4_init_system_zone(); 6736bd2d0210STheodore Ts'o if (err) 6737b5799018STheodore Ts'o goto out4; 6738857ac889SLukas Czerner 6739b5799018STheodore Ts'o err = ext4_init_sysfs(); 6740dd68314cSTheodore Ts'o if (err) 6741b5799018STheodore Ts'o goto out3; 6742857ac889SLukas Czerner 67435dabfc78STheodore Ts'o err = ext4_init_mballoc(); 6744ac27a0ecSDave Kleikamp if (err) 6745c9de560dSAlex Tomas goto out2; 6746ac27a0ecSDave Kleikamp err = init_inodecache(); 6747ac27a0ecSDave Kleikamp if (err) 6748ac27a0ecSDave Kleikamp goto out1; 6749aa75f4d3SHarshad Shirwadkar 6750aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 6751aa75f4d3SHarshad Shirwadkar if (err) 6752aa75f4d3SHarshad Shirwadkar goto out05; 6753aa75f4d3SHarshad Shirwadkar 675424b58424STheodore Ts'o register_as_ext3(); 67552035e776STheodore Ts'o register_as_ext2(); 675603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 6757ac27a0ecSDave Kleikamp if (err) 6758ac27a0ecSDave Kleikamp goto out; 6759bfff6873SLukas Czerner 6760ac27a0ecSDave Kleikamp return 0; 6761ac27a0ecSDave Kleikamp out: 676224b58424STheodore Ts'o unregister_as_ext2(); 676324b58424STheodore Ts'o unregister_as_ext3(); 6764aa75f4d3SHarshad Shirwadkar out05: 6765ac27a0ecSDave Kleikamp destroy_inodecache(); 6766ac27a0ecSDave Kleikamp out1: 67675dabfc78STheodore Ts'o ext4_exit_mballoc(); 67689c191f70ST Makphaibulchoke out2: 6769b5799018STheodore Ts'o ext4_exit_sysfs(); 6770b5799018STheodore Ts'o out3: 6771dd68314cSTheodore Ts'o ext4_exit_system_zone(); 6772b5799018STheodore Ts'o out4: 67735dabfc78STheodore Ts'o ext4_exit_pageio(); 6774b5799018STheodore Ts'o out5: 677522cfe4b4SEric Biggers ext4_exit_post_read_processing(); 67761dc0aa46SEric Whitney out6: 677722cfe4b4SEric Biggers ext4_exit_pending(); 677822cfe4b4SEric Biggers out7: 677951865fdaSZheng Liu ext4_exit_es(); 678051865fdaSZheng Liu 6781ac27a0ecSDave Kleikamp return err; 6782ac27a0ecSDave Kleikamp } 6783ac27a0ecSDave Kleikamp 67845dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 6785ac27a0ecSDave Kleikamp { 6786bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 678724b58424STheodore Ts'o unregister_as_ext2(); 678824b58424STheodore Ts'o unregister_as_ext3(); 678903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 6790ac27a0ecSDave Kleikamp destroy_inodecache(); 67915dabfc78STheodore Ts'o ext4_exit_mballoc(); 6792b5799018STheodore Ts'o ext4_exit_sysfs(); 67935dabfc78STheodore Ts'o ext4_exit_system_zone(); 67945dabfc78STheodore Ts'o ext4_exit_pageio(); 679522cfe4b4SEric Biggers ext4_exit_post_read_processing(); 6796dd12ed14SEric Sandeen ext4_exit_es(); 67971dc0aa46SEric Whitney ext4_exit_pending(); 6798ac27a0ecSDave Kleikamp } 6799ac27a0ecSDave Kleikamp 6800ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 680183982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6802ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 68037ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 68045dabfc78STheodore Ts'o module_init(ext4_init_fs) 68055dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6806