1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427abc52c2SDan Magenheimer #include <linux/cleancache.h> 437c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 44ee73f9a5SJeff Layton #include <linux/iversion.h> 45c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 46c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 47bfff6873SLukas Czerner #include <linux/kthread.h> 48bfff6873SLukas Czerner #include <linux/freezer.h> 499a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 50e5a185c2SLukas Czerner #include <linux/fs_context.h> 51e5a185c2SLukas Czerner #include <linux/fs_parser.h> 52bfff6873SLukas Czerner 533dcf5451SChristoph Hellwig #include "ext4.h" 544a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 553dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 56ac27a0ecSDave Kleikamp #include "xattr.h" 57ac27a0ecSDave Kleikamp #include "acl.h" 583661d286STheodore Ts'o #include "mballoc.h" 590c9ec4beSDarrick J. Wong #include "fsmap.h" 60ac27a0ecSDave Kleikamp 619bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 629bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 639bffad1eSTheodore Ts'o 640b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6559ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 66e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 679f6200bbSTheodore Ts'o 68617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 69ac27a0ecSDave Kleikamp unsigned long journal_devnum); 702adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 712d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 724392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7311215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 74617ba13bSMingming Cao struct ext4_super_block *es); 7511215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 76617ba13bSMingming Cao struct ext4_super_block *es); 77617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 78617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 79c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 80c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 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); 83bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 84bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 858f1f7453SEric Sandeen static void ext4_clear_request_list(void); 86c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 87c6cb7e77SEric Whitney unsigned int journal_inum); 88da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc); 89b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 90e6e268cbSLukas Czerner struct super_block *sb); 916e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb); 9202f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param); 93*cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc); 94*cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc); 95*cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc); 96*cebe85d5SLukas Czerner static int ext4_init_fs_context(struct fs_context *fc); 97*cebe85d5SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[]; 98ac27a0ecSDave Kleikamp 99e74031fdSJan Kara /* 100e74031fdSJan Kara * Lock ordering 101e74031fdSJan Kara * 102e74031fdSJan Kara * page fault path: 103d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 104d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 105e74031fdSJan Kara * 106e74031fdSJan Kara * buffered write path: 107c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 108e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 109e74031fdSJan Kara * i_data_sem (rw) 110e74031fdSJan Kara * 111e74031fdSJan Kara * truncate: 112d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 113d4f5258eSJan Kara * page lock 114d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1151d39834fSNikolay Borisov * i_data_sem (rw) 116e74031fdSJan Kara * 117e74031fdSJan Kara * direct IO: 118c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1191d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 120e74031fdSJan Kara * 121e74031fdSJan Kara * writepages: 122e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 123e74031fdSJan Kara */ 124e74031fdSJan Kara 12502f960f8SLukas Czerner static const struct fs_context_operations ext4_context_ops = { 12602f960f8SLukas Czerner .parse_param = ext4_parse_param, 127*cebe85d5SLukas Czerner .get_tree = ext4_get_tree, 128*cebe85d5SLukas Czerner .reconfigure = ext4_reconfigure, 129*cebe85d5SLukas Czerner .free = ext4_fc_free, 13002f960f8SLukas Czerner }; 13102f960f8SLukas Czerner 13202f960f8SLukas Czerner 133c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1342035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1352035e776STheodore Ts'o .owner = THIS_MODULE, 1362035e776STheodore Ts'o .name = "ext2", 137*cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 138*cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1392035e776STheodore Ts'o .kill_sb = kill_block_super, 1402035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1412035e776STheodore Ts'o }; 1427f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 143fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1442035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1452035e776STheodore Ts'o #else 1462035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1472035e776STheodore Ts'o #endif 1482035e776STheodore Ts'o 1492035e776STheodore Ts'o 150ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 151ba69f9abSJan Kara .owner = THIS_MODULE, 152ba69f9abSJan Kara .name = "ext3", 153*cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 154*cebe85d5SLukas Czerner .parameters = ext4_param_specs, 155ba69f9abSJan Kara .kill_sb = kill_block_super, 156ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 157ba69f9abSJan Kara }; 1587f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 159fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 160ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 161bd81d8eeSLaurent Vivier 162fa491b14Szhangyi (F) 163fa491b14Szhangyi (F) static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags, 164fa491b14Szhangyi (F) bh_end_io_t *end_io) 165fa491b14Szhangyi (F) { 166fb265c9cSTheodore Ts'o /* 167fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 168fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 169fa491b14Szhangyi (F) * recheck the buffer contents. 170fa491b14Szhangyi (F) */ 171fa491b14Szhangyi (F) clear_buffer_verified(bh); 172fa491b14Szhangyi (F) 173fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 174fa491b14Szhangyi (F) get_bh(bh); 175fa491b14Szhangyi (F) submit_bh(REQ_OP_READ, op_flags, bh); 176fa491b14Szhangyi (F) } 177fa491b14Szhangyi (F) 178fa491b14Szhangyi (F) void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 179fa491b14Szhangyi (F) bh_end_io_t *end_io) 180fa491b14Szhangyi (F) { 181fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 182fa491b14Szhangyi (F) 183fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 184fa491b14Szhangyi (F) unlock_buffer(bh); 185fa491b14Szhangyi (F) return; 186fa491b14Szhangyi (F) } 187fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 188fa491b14Szhangyi (F) } 189fa491b14Szhangyi (F) 190fa491b14Szhangyi (F) int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io) 191fa491b14Szhangyi (F) { 192fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 193fa491b14Szhangyi (F) 194fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 195fa491b14Szhangyi (F) unlock_buffer(bh); 196fa491b14Szhangyi (F) return 0; 197fa491b14Szhangyi (F) } 198fa491b14Szhangyi (F) 199fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 200fa491b14Szhangyi (F) 201fa491b14Szhangyi (F) wait_on_buffer(bh); 202fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 203fa491b14Szhangyi (F) return 0; 204fa491b14Szhangyi (F) return -EIO; 205fa491b14Szhangyi (F) } 206fa491b14Szhangyi (F) 207fa491b14Szhangyi (F) int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait) 208fa491b14Szhangyi (F) { 209fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 210fa491b14Szhangyi (F) if (wait) 211fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 212fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 213fa491b14Szhangyi (F) return 0; 214fa491b14Szhangyi (F) } 215fa491b14Szhangyi (F) if (wait) { 216fa491b14Szhangyi (F) wait_on_buffer(bh); 217fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 218fa491b14Szhangyi (F) return 0; 219fa491b14Szhangyi (F) return -EIO; 220fa491b14Szhangyi (F) } 221fa491b14Szhangyi (F) return 0; 222fa491b14Szhangyi (F) } 223fa491b14Szhangyi (F) 224fb265c9cSTheodore Ts'o /* 2258394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 226fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 227fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 228fb265c9cSTheodore Ts'o * return. 229fb265c9cSTheodore Ts'o */ 2308394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 2318394a6abSzhangyi (F) sector_t block, int op_flags, 2328394a6abSzhangyi (F) gfp_t gfp) 233fb265c9cSTheodore Ts'o { 2342d069c08Szhangyi (F) struct buffer_head *bh; 2352d069c08Szhangyi (F) int ret; 236fb265c9cSTheodore Ts'o 2378394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 238fb265c9cSTheodore Ts'o if (bh == NULL) 239fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 240cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 241fb265c9cSTheodore Ts'o return bh; 2422d069c08Szhangyi (F) 2432d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2442d069c08Szhangyi (F) if (ret) { 245fb265c9cSTheodore Ts'o put_bh(bh); 2462d069c08Szhangyi (F) return ERR_PTR(ret); 2472d069c08Szhangyi (F) } 2482d069c08Szhangyi (F) return bh; 249fb265c9cSTheodore Ts'o } 250fb265c9cSTheodore Ts'o 2518394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 2528394a6abSzhangyi (F) int op_flags) 2538394a6abSzhangyi (F) { 2548394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2558394a6abSzhangyi (F) } 2568394a6abSzhangyi (F) 2578394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2588394a6abSzhangyi (F) sector_t block) 2598394a6abSzhangyi (F) { 2608394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2618394a6abSzhangyi (F) } 2628394a6abSzhangyi (F) 2635df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2645df1d412Szhangyi (F) { 2655df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2665df1d412Szhangyi (F) 2675df1d412Szhangyi (F) if (likely(bh)) { 2685df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2695df1d412Szhangyi (F) brelse(bh); 2705df1d412Szhangyi (F) } 271c197855eSStephen Hemminger } 272a9c47317SDarrick J. Wong 273a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2749aa5d32bSDmitry Monakhov struct ext4_super_block *es) 275a9c47317SDarrick J. Wong { 276a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 277a9c47317SDarrick J. Wong return 1; 278a9c47317SDarrick J. Wong 279a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 28006db49e6STheodore Ts'o } 281a9c47317SDarrick J. Wong 28206db49e6STheodore Ts'o static __le32 ext4_superblock_csum(struct super_block *sb, 28306db49e6STheodore Ts'o struct ext4_super_block *es) 2849aa5d32bSDmitry Monakhov { 285a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 286a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 287a9c47317SDarrick J. Wong __u32 csum; 288a9c47317SDarrick J. Wong 289a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 2909933fc0aSTheodore Ts'o 2919933fc0aSTheodore Ts'o return cpu_to_le32(csum); 2929933fc0aSTheodore Ts'o } 2939933fc0aSTheodore Ts'o 2948be04b93SJoe Perches static int ext4_superblock_csum_verify(struct super_block *sb, 2959933fc0aSTheodore Ts'o struct ext4_super_block *es) 2969933fc0aSTheodore Ts'o { 2979933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2989933fc0aSTheodore Ts'o return 1; 2999933fc0aSTheodore Ts'o 3009933fc0aSTheodore Ts'o return es->s_checksum == ext4_superblock_csum(sb, es); 3019933fc0aSTheodore Ts'o } 3029933fc0aSTheodore Ts'o 3039933fc0aSTheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 3048be04b93SJoe Perches { 3059933fc0aSTheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3069933fc0aSTheodore Ts'o 3079933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 3089933fc0aSTheodore Ts'o return; 3099933fc0aSTheodore Ts'o 3108fadc143SAlexandre Ratchov es->s_checksum = ext4_superblock_csum(sb, es); 3118fadc143SAlexandre Ratchov } 312bd81d8eeSLaurent Vivier 313bd81d8eeSLaurent Vivier ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 314bd81d8eeSLaurent Vivier struct ext4_group_desc *bg) 315bd81d8eeSLaurent Vivier { 3163a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3178fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3188fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 319bd81d8eeSLaurent Vivier } 320bd81d8eeSLaurent Vivier 3218fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3228fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 323bd81d8eeSLaurent Vivier { 3245272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3258fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3268fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 327bd81d8eeSLaurent Vivier } 328bd81d8eeSLaurent Vivier 3298fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3308fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 331bd81d8eeSLaurent Vivier { 3325272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3338fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3348fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 335bd81d8eeSLaurent Vivier } 336bd81d8eeSLaurent Vivier 337021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 338560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 339560671a0SAneesh Kumar K.V { 340560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 341560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 342560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 343560671a0SAneesh Kumar K.V } 344560671a0SAneesh Kumar K.V 345560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 346560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 347560671a0SAneesh Kumar K.V { 348560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 349560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 350560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 351560671a0SAneesh Kumar K.V } 352560671a0SAneesh Kumar K.V 353560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 354560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 355560671a0SAneesh Kumar K.V { 356560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 357560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 358560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 359560671a0SAneesh Kumar K.V } 360560671a0SAneesh Kumar K.V 361560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 362560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 363560671a0SAneesh Kumar K.V { 364560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 365560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 366560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 367560671a0SAneesh Kumar K.V } 368560671a0SAneesh Kumar K.V 3698fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3708fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 371bd81d8eeSLaurent Vivier { 3723a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3738fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3748fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 375bd81d8eeSLaurent Vivier } 376bd81d8eeSLaurent Vivier 3778fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3788fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 379bd81d8eeSLaurent Vivier { 3805272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3818fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3828fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 383bd81d8eeSLaurent Vivier } 384bd81d8eeSLaurent Vivier 3858fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3868fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 387bd81d8eeSLaurent Vivier { 3885272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3898fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3908fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 391bd81d8eeSLaurent Vivier } 392bd81d8eeSLaurent Vivier 393021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 394560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 395560671a0SAneesh Kumar K.V { 396560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 397560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 398560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 399560671a0SAneesh Kumar K.V } 400560671a0SAneesh Kumar K.V 401560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 402560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 403560671a0SAneesh Kumar K.V { 404560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 405560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 406560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 407560671a0SAneesh Kumar K.V } 408560671a0SAneesh Kumar K.V 409560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 410560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 411560671a0SAneesh Kumar K.V { 412560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 413560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 414560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 415560671a0SAneesh Kumar K.V } 416560671a0SAneesh Kumar K.V 417560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 418560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 419560671a0SAneesh Kumar K.V { 420560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 421560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 422560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 423560671a0SAneesh Kumar K.V } 424560671a0SAneesh Kumar K.V 425c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4266a0678a7SArnd Bergmann { 4276a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4286a0678a7SArnd Bergmann 4296a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4306a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4316a0678a7SArnd Bergmann } 4326a0678a7SArnd Bergmann 4336a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4346a0678a7SArnd Bergmann { 4356a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4366a0678a7SArnd Bergmann } 4376a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 438c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 439c92dc856SJan Kara ktime_get_real_seconds()) 4406a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4416a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 442d3d1faf6SCurt Wohlgemuth 443bdfe0cbdSTheodore Ts'o /* 444bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 445bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 446bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 447bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 448bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 449bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 450bdfe0cbdSTheodore Ts'o */ 451bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 452bdfe0cbdSTheodore Ts'o { 453bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 454bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 455bdfe0cbdSTheodore Ts'o 456bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 457bdfe0cbdSTheodore Ts'o } 458bdfe0cbdSTheodore Ts'o 45918aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 46018aadd47SBobi Jam { 46118aadd47SBobi Jam struct super_block *sb = journal->j_private; 46218aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 46318aadd47SBobi Jam int error = is_journal_aborted(journal); 4645d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 46518aadd47SBobi Jam 4665d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 467a0154344SDaeho Jeong 468a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 469a0154344SDaeho Jeong 47018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4715d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4725d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4735d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 47418aadd47SBobi Jam list_del_init(&jce->jce_list); 47518aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47618aadd47SBobi Jam jce->jce_func(sb, jce, error); 47718aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 47818aadd47SBobi Jam } 47918aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 48018aadd47SBobi Jam } 4811c13d5c0STheodore Ts'o 482afb585a9SMauricio Faria de Oliveira /* 483afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 484afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 485afb585a9SMauricio Faria de Oliveira * 486afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 487afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 488afb585a9SMauricio Faria de Oliveira * to write protect the pages. 489afb585a9SMauricio Faria de Oliveira * 490afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 491afb585a9SMauricio Faria de Oliveira */ 492afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 493afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 494afb585a9SMauricio Faria de Oliveira void *data) 495afb585a9SMauricio Faria de Oliveira { 496afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 497afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 498afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 499afb585a9SMauricio Faria de Oliveira 500afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 501afb585a9SMauricio Faria de Oliveira do { 502afb585a9SMauricio Faria de Oliveira /* 503afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 504afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 505afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 506afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 507afb585a9SMauricio Faria de Oliveira * properly. 508afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 509afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 510afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 511afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 512afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 513afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 514afb585a9SMauricio Faria de Oliveira */ 515afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 516afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 517afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 518afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 519afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 520afb585a9SMauricio Faria de Oliveira goto out; 521afb585a9SMauricio Faria de Oliveira } 522afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 523afb585a9SMauricio Faria de Oliveira 524afb585a9SMauricio Faria de Oliveira out: 525afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 526afb585a9SMauricio Faria de Oliveira } 527afb585a9SMauricio Faria de Oliveira 528afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 529afb585a9SMauricio Faria de Oliveira { 530afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 531afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 532afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 533afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 534afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 535afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 536afb585a9SMauricio Faria de Oliveira }; 537afb585a9SMauricio Faria de Oliveira 538afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 539afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 540afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 541afb585a9SMauricio Faria de Oliveira } 542afb585a9SMauricio Faria de Oliveira 543afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 544afb585a9SMauricio Faria de Oliveira { 545afb585a9SMauricio Faria de Oliveira int ret; 546afb585a9SMauricio Faria de Oliveira 547afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 548afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 549afb585a9SMauricio Faria de Oliveira else 550afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 551afb585a9SMauricio Faria de Oliveira 552afb585a9SMauricio Faria de Oliveira return ret; 553afb585a9SMauricio Faria de Oliveira } 554afb585a9SMauricio Faria de Oliveira 555afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 556afb585a9SMauricio Faria de Oliveira { 557afb585a9SMauricio Faria de Oliveira int ret = 0; 558afb585a9SMauricio Faria de Oliveira 559afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 560afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 561afb585a9SMauricio Faria de Oliveira 562afb585a9SMauricio Faria de Oliveira return ret; 563afb585a9SMauricio Faria de Oliveira } 564afb585a9SMauricio Faria de Oliveira 5651dc1097fSJan Kara static bool system_going_down(void) 5661dc1097fSJan Kara { 5671dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5681dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5691dc1097fSJan Kara } 5701dc1097fSJan Kara 57102a7780eSJan Kara struct ext4_err_translation { 57202a7780eSJan Kara int code; 57302a7780eSJan Kara int errno; 57402a7780eSJan Kara }; 57502a7780eSJan Kara 57602a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 57702a7780eSJan Kara 57802a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 58202a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 58302a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 58402a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 58502a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 58602a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 58702a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 58802a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 58902a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 59002a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 59102a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 59202a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 59302a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 59402a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 59502a7780eSJan Kara }; 59602a7780eSJan Kara 59702a7780eSJan Kara static int ext4_errno_to_code(int errno) 59802a7780eSJan Kara { 59902a7780eSJan Kara int i; 60002a7780eSJan Kara 60102a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 60202a7780eSJan Kara if (err_translation[i].errno == errno) 60302a7780eSJan Kara return err_translation[i].code; 60402a7780eSJan Kara return EXT4_ERR_UNKNOWN; 60502a7780eSJan Kara } 60602a7780eSJan Kara 6072d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 60840676623SJan Kara __u32 ino, __u64 block, 60940676623SJan Kara const char *func, unsigned int line) 61040676623SJan Kara { 611c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 61240676623SJan Kara 61302a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 61402a7780eSJan Kara if (error == 0) 61502a7780eSJan Kara error = EFSCORRUPTED; 616c92dc856SJan Kara 617c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 618c92dc856SJan Kara sbi->s_add_error_count++; 619c92dc856SJan Kara sbi->s_last_error_code = error; 620c92dc856SJan Kara sbi->s_last_error_line = line; 621c92dc856SJan Kara sbi->s_last_error_ino = ino; 622c92dc856SJan Kara sbi->s_last_error_block = block; 623c92dc856SJan Kara sbi->s_last_error_func = func; 624c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 625c92dc856SJan Kara if (!sbi->s_first_error_time) { 626c92dc856SJan Kara sbi->s_first_error_code = error; 627c92dc856SJan Kara sbi->s_first_error_line = line; 628c92dc856SJan Kara sbi->s_first_error_ino = ino; 629c92dc856SJan Kara sbi->s_first_error_block = block; 630c92dc856SJan Kara sbi->s_first_error_func = func; 631c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 63240676623SJan Kara } 633c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 63440676623SJan Kara } 63540676623SJan Kara 636ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 637ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 638ac27a0ecSDave Kleikamp * 639ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 640617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 641ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 642ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 643ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 644ac27a0ecSDave Kleikamp * write out the superblock safely. 645ac27a0ecSDave Kleikamp * 646dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 647d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 648ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 649014c9caaSJan Kara * 650014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 651014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 652014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 653014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 654014c9caaSJan Kara * at a critical moment in log management. 655ac27a0ecSDave Kleikamp */ 656e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 657e789ca0cSJan Kara __u32 ino, __u64 block, 658e789ca0cSJan Kara const char *func, unsigned int line) 659ac27a0ecSDave Kleikamp { 660b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6612d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 662b08070ecSJan Kara 663e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 664327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 665327eaf73STheodore Ts'o WARN_ON_ONCE(1); 666327eaf73STheodore Ts'o 6672d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6689b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 669ac27a0ecSDave Kleikamp if (journal) 670dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6712d01ddc8SJan Kara } 6722d01ddc8SJan Kara 6732d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6742d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6752d01ddc8SJan Kara /* 6762d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6772d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6782d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6792d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6802d01ddc8SJan Kara */ 681bb9464e0Syangerkun if (continue_fs && journal) 6822d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6832d01ddc8SJan Kara else 6842d01ddc8SJan Kara ext4_commit_super(sb); 6852d01ddc8SJan Kara } 6862d01ddc8SJan Kara 6871dc1097fSJan Kara /* 6881dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6891dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6901dc1097fSJan Kara * disabled. 6911dc1097fSJan Kara */ 692014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 693617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 694ac27a0ecSDave Kleikamp sb->s_id); 695ac27a0ecSDave Kleikamp } 696ac2f7ca5SYe Bin 697ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 698ac2f7ca5SYe Bin return; 699ac2f7ca5SYe Bin 700014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 701014c9caaSJan Kara /* 702014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 703014c9caaSJan Kara * ->s_flags update 704014c9caaSJan Kara */ 705014c9caaSJan Kara smp_wmb(); 706014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 7074327ba52SDaeho Jeong } 708ac27a0ecSDave Kleikamp 709c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 710c92dc856SJan Kara { 711c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 712c92dc856SJan Kara s_error_work); 7132d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7142d01ddc8SJan Kara handle_t *handle; 715c92dc856SJan Kara 7162d01ddc8SJan Kara /* 7172d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7182d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7192d01ddc8SJan Kara * updates. 7202d01ddc8SJan Kara * 7212d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7222d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7232d01ddc8SJan Kara */ 7242d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 725558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7262d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7272d01ddc8SJan Kara if (IS_ERR(handle)) 7282d01ddc8SJan Kara goto write_directly; 729558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7302d01ddc8SJan Kara jbd2_journal_stop(handle); 7312d01ddc8SJan Kara goto write_directly; 7322d01ddc8SJan Kara } 7332d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 734558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 735558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 736558d6450SYe Bin "superblock detected"); 737558d6450SYe Bin clear_buffer_write_io_error(sbh); 738558d6450SYe Bin set_buffer_uptodate(sbh); 739558d6450SYe Bin } 740558d6450SYe Bin 741558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7422d01ddc8SJan Kara jbd2_journal_stop(handle); 7432d01ddc8SJan Kara goto write_directly; 7442d01ddc8SJan Kara } 7452d01ddc8SJan Kara jbd2_journal_stop(handle); 746d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7472d01ddc8SJan Kara return; 7482d01ddc8SJan Kara } 7492d01ddc8SJan Kara write_directly: 7502d01ddc8SJan Kara /* 7512d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7522d01ddc8SJan Kara * out and hope for the best. 7532d01ddc8SJan Kara */ 7544392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 755d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 756ac27a0ecSDave Kleikamp } 757ac27a0ecSDave Kleikamp 758efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 759efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 760efbed4dcSTheodore Ts'o "EXT4-fs error") 761efbed4dcSTheodore Ts'o 76212062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 763014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 76454d3adbcSTheodore Ts'o const char *fmt, ...) 765ac27a0ecSDave Kleikamp { 7660ff2ea7dSJoe Perches struct va_format vaf; 767ac27a0ecSDave Kleikamp va_list args; 768ac27a0ecSDave Kleikamp 7690db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7700db1ff22STheodore Ts'o return; 7710db1ff22STheodore Ts'o 772ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 773efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 774ac27a0ecSDave Kleikamp va_start(args, fmt); 7750ff2ea7dSJoe Perches vaf.fmt = fmt; 7760ff2ea7dSJoe Perches vaf.va = &args; 777efbed4dcSTheodore Ts'o printk(KERN_CRIT 778efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7790ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 780ac27a0ecSDave Kleikamp va_end(args); 781efbed4dcSTheodore Ts'o } 7829a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7839a089b21SGabriel Krisman Bertazi 784e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 785ac27a0ecSDave Kleikamp } 786ac27a0ecSDave Kleikamp 787e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 78854d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 789273df556SFrank Mayhar const char *fmt, ...) 790273df556SFrank Mayhar { 791273df556SFrank Mayhar va_list args; 792f7c21177STheodore Ts'o struct va_format vaf; 793273df556SFrank Mayhar 7940db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7950db1ff22STheodore Ts'o return; 7960db1ff22STheodore Ts'o 797ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 798efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 799273df556SFrank Mayhar va_start(args, fmt); 800f7c21177STheodore Ts'o vaf.fmt = fmt; 801f7c21177STheodore Ts'o vaf.va = &args; 802c398eda0STheodore Ts'o if (block) 803d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 804d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 805d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 806d9ee81daSJoe Perches block, current->comm, &vaf); 807d9ee81daSJoe Perches else 808d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 809d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 810d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 811d9ee81daSJoe Perches current->comm, &vaf); 812273df556SFrank Mayhar va_end(args); 813efbed4dcSTheodore Ts'o } 8149a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8159a089b21SGabriel Krisman Bertazi 816e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 81754d3adbcSTheodore Ts'o function, line); 818273df556SFrank Mayhar } 819273df556SFrank Mayhar 820e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 821f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 822f7c21177STheodore Ts'o const char *fmt, ...) 823273df556SFrank Mayhar { 824273df556SFrank Mayhar va_list args; 825f7c21177STheodore Ts'o struct va_format vaf; 826496ad9aaSAl Viro struct inode *inode = file_inode(file); 827273df556SFrank Mayhar char pathname[80], *path; 828273df556SFrank Mayhar 8290db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8300db1ff22STheodore Ts'o return; 8310db1ff22STheodore Ts'o 832ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 833efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8349bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 835f9a62d09SDan Carpenter if (IS_ERR(path)) 836273df556SFrank Mayhar path = "(unknown)"; 837f7c21177STheodore Ts'o va_start(args, fmt); 838f7c21177STheodore Ts'o vaf.fmt = fmt; 839f7c21177STheodore Ts'o vaf.va = &args; 840d9ee81daSJoe Perches if (block) 841d9ee81daSJoe Perches printk(KERN_CRIT 842d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 843d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 844d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 845d9ee81daSJoe Perches block, current->comm, path, &vaf); 846d9ee81daSJoe Perches else 847d9ee81daSJoe Perches printk(KERN_CRIT 848d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 849d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 850d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 851d9ee81daSJoe Perches current->comm, path, &vaf); 852273df556SFrank Mayhar va_end(args); 853efbed4dcSTheodore Ts'o } 8549a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8559a089b21SGabriel Krisman Bertazi 856e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 85754d3adbcSTheodore Ts'o function, line); 858273df556SFrank Mayhar } 859273df556SFrank Mayhar 860722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 861ac27a0ecSDave Kleikamp char nbuf[16]) 862ac27a0ecSDave Kleikamp { 863ac27a0ecSDave Kleikamp char *errstr = NULL; 864ac27a0ecSDave Kleikamp 865ac27a0ecSDave Kleikamp switch (errno) { 8666a797d27SDarrick J. Wong case -EFSCORRUPTED: 8676a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8686a797d27SDarrick J. Wong break; 8696a797d27SDarrick J. Wong case -EFSBADCRC: 8706a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8716a797d27SDarrick J. Wong break; 872ac27a0ecSDave Kleikamp case -EIO: 873ac27a0ecSDave Kleikamp errstr = "IO failure"; 874ac27a0ecSDave Kleikamp break; 875ac27a0ecSDave Kleikamp case -ENOMEM: 876ac27a0ecSDave Kleikamp errstr = "Out of memory"; 877ac27a0ecSDave Kleikamp break; 878ac27a0ecSDave Kleikamp case -EROFS: 87978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 88078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 881ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 882ac27a0ecSDave Kleikamp else 883ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 884ac27a0ecSDave Kleikamp break; 885ac27a0ecSDave Kleikamp default: 886ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 887ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 888ac27a0ecSDave Kleikamp * NULL. */ 889ac27a0ecSDave Kleikamp if (nbuf) { 890ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 891ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 892ac27a0ecSDave Kleikamp errstr = nbuf; 893ac27a0ecSDave Kleikamp } 894ac27a0ecSDave Kleikamp break; 895ac27a0ecSDave Kleikamp } 896ac27a0ecSDave Kleikamp 897ac27a0ecSDave Kleikamp return errstr; 898ac27a0ecSDave Kleikamp } 899ac27a0ecSDave Kleikamp 900617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 901ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 902ac27a0ecSDave Kleikamp 903c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 904c398eda0STheodore Ts'o unsigned int line, int errno) 905ac27a0ecSDave Kleikamp { 906ac27a0ecSDave Kleikamp char nbuf[16]; 907ac27a0ecSDave Kleikamp const char *errstr; 908ac27a0ecSDave Kleikamp 9090db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9100db1ff22STheodore Ts'o return; 9110db1ff22STheodore Ts'o 912ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 913ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 914ac27a0ecSDave Kleikamp * an error. */ 915bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 916ac27a0ecSDave Kleikamp return; 917ac27a0ecSDave Kleikamp 918efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 919617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 920c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 921c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 922efbed4dcSTheodore Ts'o } 9239a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 924ac27a0ecSDave Kleikamp 925e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 926ac27a0ecSDave Kleikamp } 927ac27a0ecSDave Kleikamp 928e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 929e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 930b31e1552SEric Sandeen { 9310ff2ea7dSJoe Perches struct va_format vaf; 932b31e1552SEric Sandeen va_list args; 933b31e1552SEric Sandeen 934da812f61SLukas Czerner if (sb) { 9351cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 936da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 937da812f61SLukas Czerner "EXT4-fs")) 938efbed4dcSTheodore Ts'o return; 939da812f61SLukas Czerner } 940efbed4dcSTheodore Ts'o 941b31e1552SEric Sandeen va_start(args, fmt); 9420ff2ea7dSJoe Perches vaf.fmt = fmt; 9430ff2ea7dSJoe Perches vaf.va = &args; 944da812f61SLukas Czerner if (sb) 9450ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 946da812f61SLukas Czerner else 947da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 948b31e1552SEric Sandeen va_end(args); 949b31e1552SEric Sandeen } 950b31e1552SEric Sandeen 9511cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9521cf006edSDmitry Monakhov { 9531cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9541cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9551cf006edSDmitry Monakhov "EXT4-fs warning"); 9561cf006edSDmitry Monakhov } 957b03a2f7eSAndreas Dilger 95812062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 959c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 960ac27a0ecSDave Kleikamp { 9610ff2ea7dSJoe Perches struct va_format vaf; 962ac27a0ecSDave Kleikamp va_list args; 963ac27a0ecSDave Kleikamp 964b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 965efbed4dcSTheodore Ts'o return; 966efbed4dcSTheodore Ts'o 967ac27a0ecSDave Kleikamp va_start(args, fmt); 9680ff2ea7dSJoe Perches vaf.fmt = fmt; 9690ff2ea7dSJoe Perches vaf.va = &args; 9700ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9710ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 972ac27a0ecSDave Kleikamp va_end(args); 973ac27a0ecSDave Kleikamp } 974ac27a0ecSDave Kleikamp 975b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 976b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 977b03a2f7eSAndreas Dilger { 978b03a2f7eSAndreas Dilger struct va_format vaf; 979b03a2f7eSAndreas Dilger va_list args; 980b03a2f7eSAndreas Dilger 981b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 982b03a2f7eSAndreas Dilger return; 983b03a2f7eSAndreas Dilger 984b03a2f7eSAndreas Dilger va_start(args, fmt); 985b03a2f7eSAndreas Dilger vaf.fmt = fmt; 986b03a2f7eSAndreas Dilger vaf.va = &args; 987b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 988b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 989b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 990b03a2f7eSAndreas Dilger va_end(args); 991b03a2f7eSAndreas Dilger } 992b03a2f7eSAndreas Dilger 993e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 994e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 995e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 996e29136f8STheodore Ts'o const char *fmt, ...) 9975d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9985d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9995d1b1b3fSAneesh Kumar K.V { 10000ff2ea7dSJoe Perches struct va_format vaf; 10015d1b1b3fSAneesh Kumar K.V va_list args; 10025d1b1b3fSAneesh Kumar K.V 10030db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 10040db1ff22STheodore Ts'o return; 10050db1ff22STheodore Ts'o 1006ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 1007efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10085d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10090ff2ea7dSJoe Perches vaf.fmt = fmt; 10100ff2ea7dSJoe Perches vaf.va = &args; 101121149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1012e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1013e29136f8STheodore Ts'o if (ino) 10140ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1015e29136f8STheodore Ts'o if (block) 1016efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1017efbed4dcSTheodore Ts'o (unsigned long long) block); 10180ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10195d1b1b3fSAneesh Kumar K.V va_end(args); 1020efbed4dcSTheodore Ts'o } 10215d1b1b3fSAneesh Kumar K.V 1022c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1023327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1024327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1025e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10262d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10272d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10282d01ddc8SJan Kara line); 1029c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10302d01ddc8SJan Kara } 10315d1b1b3fSAneesh Kumar K.V return; 10325d1b1b3fSAneesh Kumar K.V } 10335d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1034e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10355d1b1b3fSAneesh Kumar K.V /* 10365d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10375d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10385d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10395d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10405d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 104125985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10425d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10435d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10445d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10455d1b1b3fSAneesh Kumar K.V */ 10465d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10475d1b1b3fSAneesh Kumar K.V return; 10485d1b1b3fSAneesh Kumar K.V } 10495d1b1b3fSAneesh Kumar K.V 1050db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1051db79e6d1SWang Shilong ext4_group_t group, 1052db79e6d1SWang Shilong unsigned int flags) 1053db79e6d1SWang Shilong { 1054db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1055db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1056db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10579af0b3d1SWang Shilong int ret; 1058db79e6d1SWang Shilong 10599af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10609af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10619af0b3d1SWang Shilong &grp->bb_state); 10629af0b3d1SWang Shilong if (!ret) 1063db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1064db79e6d1SWang Shilong grp->bb_free); 1065db79e6d1SWang Shilong } 1066db79e6d1SWang Shilong 10679af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10689af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10699af0b3d1SWang Shilong &grp->bb_state); 10709af0b3d1SWang Shilong if (!ret && gdp) { 1071db79e6d1SWang Shilong int count; 1072db79e6d1SWang Shilong 1073db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1074db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1075db79e6d1SWang Shilong count); 1076db79e6d1SWang Shilong } 1077db79e6d1SWang Shilong } 1078db79e6d1SWang Shilong } 1079db79e6d1SWang Shilong 1080617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1081ac27a0ecSDave Kleikamp { 1082617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1083ac27a0ecSDave Kleikamp 1084617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1085ac27a0ecSDave Kleikamp return; 1086ac27a0ecSDave Kleikamp 108712062dddSEric Sandeen ext4_warning(sb, 1088ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1089ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1090617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1091ac27a0ecSDave Kleikamp 1092617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1093617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1094617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1095ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1096ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1097ac27a0ecSDave Kleikamp 1098ac27a0ecSDave Kleikamp /* 1099ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1100ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1101ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1102ac27a0ecSDave Kleikamp */ 1103ac27a0ecSDave Kleikamp } 1104ac27a0ecSDave Kleikamp 1105ac27a0ecSDave Kleikamp /* 1106ac27a0ecSDave Kleikamp * Open the external journal device 1107ac27a0ecSDave Kleikamp */ 1108b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1109ac27a0ecSDave Kleikamp { 1110ac27a0ecSDave Kleikamp struct block_device *bdev; 1111ac27a0ecSDave Kleikamp 1112d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1113ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1114ac27a0ecSDave Kleikamp goto fail; 1115ac27a0ecSDave Kleikamp return bdev; 1116ac27a0ecSDave Kleikamp 1117ac27a0ecSDave Kleikamp fail: 1118ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1119ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1120ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1121ac27a0ecSDave Kleikamp return NULL; 1122ac27a0ecSDave Kleikamp } 1123ac27a0ecSDave Kleikamp 1124ac27a0ecSDave Kleikamp /* 1125ac27a0ecSDave Kleikamp * Release the journal device 1126ac27a0ecSDave Kleikamp */ 11274385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1128ac27a0ecSDave Kleikamp { 11294385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1130ac27a0ecSDave Kleikamp } 1131ac27a0ecSDave Kleikamp 11324385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1133ac27a0ecSDave Kleikamp { 1134ac27a0ecSDave Kleikamp struct block_device *bdev; 1135ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1136ac27a0ecSDave Kleikamp if (bdev) { 11374385bab1SAl Viro ext4_blkdev_put(bdev); 1138ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1139ac27a0ecSDave Kleikamp } 1140ac27a0ecSDave Kleikamp } 1141ac27a0ecSDave Kleikamp 1142ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1143ac27a0ecSDave Kleikamp { 1144617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1145ac27a0ecSDave Kleikamp } 1146ac27a0ecSDave Kleikamp 1147617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1148ac27a0ecSDave Kleikamp { 1149ac27a0ecSDave Kleikamp struct list_head *l; 1150ac27a0ecSDave Kleikamp 1151b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1152ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1153ac27a0ecSDave Kleikamp 1154ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1155ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1156ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1157ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1158ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1159ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1160ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1161ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1162ac27a0ecSDave Kleikamp } 1163ac27a0ecSDave Kleikamp } 1164ac27a0ecSDave Kleikamp 1165957153fcSJan Kara #ifdef CONFIG_QUOTA 1166957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1167957153fcSJan Kara 1168957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1169957153fcSJan Kara { 1170957153fcSJan Kara int type; 1171957153fcSJan Kara 1172957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1173957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1174957153fcSJan Kara ext4_quota_off(sb, type); 1175957153fcSJan Kara } 117633458eabSTheodore Ts'o 117733458eabSTheodore Ts'o /* 117833458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 117933458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 118033458eabSTheodore Ts'o */ 118133458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 118233458eabSTheodore Ts'o struct ext4_sb_info *sbi, 118333458eabSTheodore Ts'o int type) 118433458eabSTheodore Ts'o { 118533458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 118633458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 118733458eabSTheodore Ts'o } 1188957153fcSJan Kara #else 1189957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1190957153fcSJan Kara { 1191957153fcSJan Kara } 1192957153fcSJan Kara #endif 1193957153fcSJan Kara 1194617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1195ac27a0ecSDave Kleikamp { 1196617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1197617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11981d0c3924STheodore Ts'o struct buffer_head **group_desc; 11997c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 120097abd7d4STheodore Ts'o int aborted = 0; 1201ef2cabf7SHidehiro Kawai int i, err; 1202ac27a0ecSDave Kleikamp 1203857ac889SLukas Czerner ext4_unregister_li_request(sb); 1204957153fcSJan Kara ext4_quota_off_umount(sb); 1205e0ccfd95SChristoph Hellwig 1206c92dc856SJan Kara flush_work(&sbi->s_error_work); 12072e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 120802f310fcSJan Kara ext4_release_orphan_info(sb); 12094c0425ffSMingming Cao 12105e47868fSRitesh Harjani /* 12115e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 12125e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 12135e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 12145e47868fSRitesh Harjani */ 12155e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 12165e47868fSRitesh Harjani 12170390131bSFrank Mayhar if (sbi->s_journal) { 121897abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1219ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 122047b4a50bSJan Kara sbi->s_journal = NULL; 1221878520acSTheodore Ts'o if ((err < 0) && !aborted) { 122254d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12230390131bSFrank Mayhar } 1224878520acSTheodore Ts'o } 1225d4edac31SJosef Bacik 1226d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12279105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1228d4edac31SJosef Bacik ext4_release_system_zone(sb); 1229d4edac31SJosef Bacik ext4_mb_release(sb); 1230d4edac31SJosef Bacik ext4_ext_release(sb); 1231d4edac31SJosef Bacik 1232bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1233e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 123402f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1235ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1236ac27a0ecSDave Kleikamp } 1237bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12384392fbc4SJan Kara ext4_commit_super(sb); 1239a8e25a83SArtem Bityutskiy 12401d0c3924STheodore Ts'o rcu_read_lock(); 12411d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1242ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12431d0c3924STheodore Ts'o brelse(group_desc[i]); 12441d0c3924STheodore Ts'o kvfree(group_desc); 12457c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12467c990728SSuraj Jitindar Singh if (flex_groups) { 12477c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12487c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12497c990728SSuraj Jitindar Singh kvfree(flex_groups); 12507c990728SSuraj Jitindar Singh } 12511d0c3924STheodore Ts'o rcu_read_unlock(); 125257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1253ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1254ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 125557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1256efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1257bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1258ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1259a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 126033458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1261ac27a0ecSDave Kleikamp #endif 1262ac27a0ecSDave Kleikamp 1263ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1264ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1265ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1266ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1267ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1268ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1269837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1270ac27a0ecSDave Kleikamp 127189d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1272f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1273ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1274ac27a0ecSDave Kleikamp /* 1275ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1276ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1277ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1278ac27a0ecSDave Kleikamp */ 1279ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1280ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1281617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1282ac27a0ecSDave Kleikamp } 128350c15df6SChengguang Xu 1284dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1285dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 128650c15df6SChengguang Xu 128747387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 128847387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 128950c15df6SChengguang Xu 1290618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1291618f0031SPavel Skripkin 12929060dd2cSEric Sandeen brelse(sbi->s_sbh); 1293ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12943197ebdbSTheodore Ts'o /* 12953197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12963197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12973197ebdbSTheodore Ts'o */ 12983197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12993197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13000441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13010441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1302705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13035e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1304ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 1305c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1306f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1307c83ad55eSGabriel Krisman Bertazi #endif 1308ac27a0ecSDave Kleikamp kfree(sbi); 1309ac27a0ecSDave Kleikamp } 1310ac27a0ecSDave Kleikamp 1311e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1312ac27a0ecSDave Kleikamp 1313ac27a0ecSDave Kleikamp /* 1314ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1315ac27a0ecSDave Kleikamp */ 1316617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1317ac27a0ecSDave Kleikamp { 1318617ba13bSMingming Cao struct ext4_inode_info *ei; 1319ac27a0ecSDave Kleikamp 1320e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1321ac27a0ecSDave Kleikamp if (!ei) 1322ac27a0ecSDave Kleikamp return NULL; 13230b8e58a1SAndreas Dilger 1324ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1325202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1326c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 132727bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1328c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13299a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13309a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1331edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1332eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1333edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1334dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1335d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1336d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13371dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1338a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1339a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 134096c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1341a9e7f447SDmitry Monakhov #endif 13428aefcd55STheodore Ts'o ei->jinode = NULL; 13432e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1344744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1345b436b9beSJan Kara ei->i_sync_tid = 0; 1346b436b9beSJan Kara ei->i_datasync_tid = 0; 1347e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13482e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1349aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1350aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1351ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1352ac27a0ecSDave Kleikamp } 1353ac27a0ecSDave Kleikamp 13547ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13557ff9c073STheodore Ts'o { 13567ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13577ff9c073STheodore Ts'o 135829b3692eSEric Biggers if (!drop) 135929b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 136029b3692eSEric Biggers 13617ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13627ff9c073STheodore Ts'o return drop; 13637ff9c073STheodore Ts'o } 13647ff9c073STheodore Ts'o 136594053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1366fa0d7e3dSNick Piggin { 13672c58d548SEric Biggers fscrypt_free_inode(inode); 1368aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1369aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1370aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1371aa75f4d3SHarshad Shirwadkar } 1372fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1373fa0d7e3dSNick Piggin } 1374fa0d7e3dSNick Piggin 1375617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1376ac27a0ecSDave Kleikamp { 13779f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1378b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1379b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1380b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13819f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13829f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13839f7dd93dSVasily Averin true); 13849f7dd93dSVasily Averin dump_stack(); 13859f7dd93dSVasily Averin } 13866fed8395SJeffle Xu 13876fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13886fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13896fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13906fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13916fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1392ac27a0ecSDave Kleikamp } 1393ac27a0ecSDave Kleikamp 139451cc5068SAlexey Dobriyan static void init_once(void *foo) 1395ac27a0ecSDave Kleikamp { 1396617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1397ac27a0ecSDave Kleikamp 1398ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1399ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14000e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1401ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1402aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1403ac27a0ecSDave Kleikamp } 1404ac27a0ecSDave Kleikamp 1405e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1406ac27a0ecSDave Kleikamp { 1407f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1408f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1409f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1410f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1411f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1412f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 141320c2df83SPaul Mundt init_once); 1414617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1415ac27a0ecSDave Kleikamp return -ENOMEM; 1416ac27a0ecSDave Kleikamp return 0; 1417ac27a0ecSDave Kleikamp } 1418ac27a0ecSDave Kleikamp 1419ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1420ac27a0ecSDave Kleikamp { 14218c0a8537SKirill A. Shutemov /* 14228c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14238c0a8537SKirill A. Shutemov * destroy cache. 14248c0a8537SKirill A. Shutemov */ 14258c0a8537SKirill A. Shutemov rcu_barrier(); 1426617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1427ac27a0ecSDave Kleikamp } 1428ac27a0ecSDave Kleikamp 14290930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1430ac27a0ecSDave Kleikamp { 1431aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14320930fcc1SAl Viro invalidate_inode_buffers(inode); 1433dbd5768fSJan Kara clear_inode(inode); 143427bc446eSbrookxu ext4_discard_preallocations(inode, 0); 143551865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1436f4c2d372SJan Kara dquot_drop(inode); 14378aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14388aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14398aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14408aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14418aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14428aefcd55STheodore Ts'o } 14433d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1444c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1445ac27a0ecSDave Kleikamp } 1446ac27a0ecSDave Kleikamp 14471b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14481b961ac0SChristoph Hellwig u64 ino, u32 generation) 1449ac27a0ecSDave Kleikamp { 1450ac27a0ecSDave Kleikamp struct inode *inode; 1451ac27a0ecSDave Kleikamp 14528a363970STheodore Ts'o /* 1453ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1454ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1455ac27a0ecSDave Kleikamp */ 14568a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14571d1fe1eeSDavid Howells if (IS_ERR(inode)) 14581d1fe1eeSDavid Howells return ERR_CAST(inode); 14591d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1460ac27a0ecSDave Kleikamp iput(inode); 1461ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1462ac27a0ecSDave Kleikamp } 14631b961ac0SChristoph Hellwig 14641b961ac0SChristoph Hellwig return inode; 1465ac27a0ecSDave Kleikamp } 14661b961ac0SChristoph Hellwig 14671b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14681b961ac0SChristoph Hellwig int fh_len, int fh_type) 14691b961ac0SChristoph Hellwig { 14701b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14711b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14721b961ac0SChristoph Hellwig } 14731b961ac0SChristoph Hellwig 14741b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14751b961ac0SChristoph Hellwig int fh_len, int fh_type) 14761b961ac0SChristoph Hellwig { 14771b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14781b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1479ac27a0ecSDave Kleikamp } 1480ac27a0ecSDave Kleikamp 1481fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1482fde87268STheodore Ts'o { 1483fde87268STheodore Ts'o struct writeback_control wbc = { 1484fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1485fde87268STheodore Ts'o }; 1486fde87268STheodore Ts'o 1487fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1488fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1489fde87268STheodore Ts'o } 1490fde87268STheodore Ts'o 1491643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1492a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1493a7550b30SJaegeuk Kim { 1494a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1495a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1496a7550b30SJaegeuk Kim } 1497a7550b30SJaegeuk Kim 1498a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1499a7550b30SJaegeuk Kim void *fs_data) 1500a7550b30SJaegeuk Kim { 15012f8f5e76SEric Biggers handle_t *handle = fs_data; 1502c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1503a7550b30SJaegeuk Kim 15049ce0151aSEric Biggers /* 15059ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 15069ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 15079ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 15089ce0151aSEric Biggers * the filename "lost+found" itself. 15099ce0151aSEric Biggers */ 15109ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 15119ce0151aSEric Biggers return -EPERM; 1512a7550b30SJaegeuk Kim 15137d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 15147d3e06a8SRoss Zwisler return -EINVAL; 15157d3e06a8SRoss Zwisler 1516b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1517b383a73fSIra Weiny return -EOPNOTSUPP; 1518b383a73fSIra Weiny 151994840e3cSEric Biggers res = ext4_convert_inline_data(inode); 152094840e3cSEric Biggers if (res) 152194840e3cSEric Biggers return res; 152294840e3cSEric Biggers 15232f8f5e76SEric Biggers /* 15242f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 15252f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 15262f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15272f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15282f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15292f8f5e76SEric Biggers */ 15302f8f5e76SEric Biggers 15312f8f5e76SEric Biggers if (handle) { 15322f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15332f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15342f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15352f8f5e76SEric Biggers ctx, len, 0); 1536a7550b30SJaegeuk Kim if (!res) { 1537a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1538a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1539a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1540a3caa24bSJan Kara /* 15412ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15422ee6a576SEric Biggers * S_DAX may be disabled 1543a3caa24bSJan Kara */ 1544043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1545a7550b30SJaegeuk Kim } 1546a7550b30SJaegeuk Kim return res; 1547a7550b30SJaegeuk Kim } 1548a7550b30SJaegeuk Kim 1549b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1550b8cb5a54STahsin Erdogan if (res) 1551b8cb5a54STahsin Erdogan return res; 15522f8f5e76SEric Biggers retry: 1553af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1554af65207cSTahsin Erdogan &credits); 1555dec214d0STahsin Erdogan if (res) 1556dec214d0STahsin Erdogan return res; 1557dec214d0STahsin Erdogan 1558c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1559a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1560a7550b30SJaegeuk Kim return PTR_ERR(handle); 1561a7550b30SJaegeuk Kim 15622f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15632f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15642f8f5e76SEric Biggers ctx, len, 0); 1565a7550b30SJaegeuk Kim if (!res) { 1566a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15672ee6a576SEric Biggers /* 15682ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15692ee6a576SEric Biggers * S_DAX may be disabled 15702ee6a576SEric Biggers */ 1571043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1572a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1573a7550b30SJaegeuk Kim if (res) 1574a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1575a7550b30SJaegeuk Kim } 1576a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15772f8f5e76SEric Biggers 15782f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15792f8f5e76SEric Biggers goto retry; 1580a7550b30SJaegeuk Kim if (!res) 1581a7550b30SJaegeuk Kim res = res2; 1582a7550b30SJaegeuk Kim return res; 1583a7550b30SJaegeuk Kim } 1584a7550b30SJaegeuk Kim 1585ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1586a7550b30SJaegeuk Kim { 1587ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1588a7550b30SJaegeuk Kim } 1589a7550b30SJaegeuk Kim 1590b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1591b925acb8SEric Biggers { 1592b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1593b925acb8SEric Biggers } 1594b925acb8SEric Biggers 1595b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1596b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1597b925acb8SEric Biggers { 1598b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1599b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1600b925acb8SEric Biggers } 1601b925acb8SEric Biggers 16026f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1603a5d431efSEric Biggers .key_prefix = "ext4:", 1604a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1605a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1606ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1607a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1608b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1609b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1610a7550b30SJaegeuk Kim }; 1611a7550b30SJaegeuk Kim #endif 1612a7550b30SJaegeuk Kim 1613ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1614d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1615689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1616ac27a0ecSDave Kleikamp 1617617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1618617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1619617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1620617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1621617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 16226f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 16238c54ca9cSAl Viro const struct path *path); 1624617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1625ac27a0ecSDave Kleikamp size_t len, loff_t off); 1626617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1627ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16287c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16297c319d32SAditya Kali unsigned int flags); 1630ac27a0ecSDave Kleikamp 163196c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 163296c7e0d9SJan Kara { 163396c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 163496c7e0d9SJan Kara } 163596c7e0d9SJan Kara 163661e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 163760e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1638617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1639617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1640617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1641617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1642a5b5ee32SJan Kara .write_info = ext4_write_info, 1643a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1644a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1645040cb378SLi Xi .get_projid = ext4_get_projid, 16467a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1647ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1648ac27a0ecSDave Kleikamp }; 1649ac27a0ecSDave Kleikamp 16500d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1651617ba13bSMingming Cao .quota_on = ext4_quota_on, 1652ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1653287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16540a240339SJan Kara .get_state = dquot_get_state, 1655287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1656287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16576332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16586332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1659ac27a0ecSDave Kleikamp }; 1660ac27a0ecSDave Kleikamp #endif 1661ac27a0ecSDave Kleikamp 1662ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1663617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 166494053139SAl Viro .free_inode = ext4_free_in_core_inode, 1665617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1666617ba13bSMingming Cao .write_inode = ext4_write_inode, 1667617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16687ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16690930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1670617ba13bSMingming Cao .put_super = ext4_put_super, 1671617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1672c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1673c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1674617ba13bSMingming Cao .statfs = ext4_statfs, 1675617ba13bSMingming Cao .show_options = ext4_show_options, 1676ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1677617ba13bSMingming Cao .quota_read = ext4_quota_read, 1678617ba13bSMingming Cao .quota_write = ext4_quota_write, 167996c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1680ac27a0ecSDave Kleikamp #endif 1681ac27a0ecSDave Kleikamp }; 1682ac27a0ecSDave Kleikamp 168339655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16841b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16851b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1686617ba13bSMingming Cao .get_parent = ext4_get_parent, 1687fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1688ac27a0ecSDave Kleikamp }; 1689ac27a0ecSDave Kleikamp 1690ac27a0ecSDave Kleikamp enum { 1691ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1692ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 169372578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1694ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 169572578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1696ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1697ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1698ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16996ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 17004f74d15fSEric Biggers Opt_inlinecrypt, 1701ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 17025a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1703ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 17049cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 17059cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1706327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1707327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1708670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 17091449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 17105328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1711744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1712fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1713cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 171421175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1715e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 17168016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 171799c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 17188016e29fSHarshad Shirwadkar #endif 1719ac27a0ecSDave Kleikamp }; 1720ac27a0ecSDave Kleikamp 1721e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1722e5a185c2SLukas Czerner {"continue", Opt_err_cont}, 1723e5a185c2SLukas Czerner {"panic", Opt_err_panic}, 1724e5a185c2SLukas Czerner {"remount-ro", Opt_err_ro}, 1725e5a185c2SLukas Czerner {} 1726e5a185c2SLukas Czerner }; 1727e5a185c2SLukas Czerner 1728e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1729e5a185c2SLukas Czerner {"journal", Opt_data_journal}, 1730e5a185c2SLukas Czerner {"ordered", Opt_data_ordered}, 1731e5a185c2SLukas Czerner {"writeback", Opt_data_writeback}, 1732e5a185c2SLukas Czerner {} 1733e5a185c2SLukas Czerner }; 1734e5a185c2SLukas Czerner 1735e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1736e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1737e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1738e5a185c2SLukas Czerner {} 1739e5a185c2SLukas Czerner }; 1740e5a185c2SLukas Czerner 1741e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1742e5a185c2SLukas Czerner {"vfsold", Opt_jqfmt_vfsold}, 1743e5a185c2SLukas Czerner {"vfsv0", Opt_jqfmt_vfsv0}, 1744e5a185c2SLukas Czerner {"vfsv1", Opt_jqfmt_vfsv1}, 1745e5a185c2SLukas Czerner {} 1746e5a185c2SLukas Czerner }; 1747e5a185c2SLukas Czerner 1748e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1749e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1750e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1751e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1752e5a185c2SLukas Czerner {} 1753e5a185c2SLukas Czerner }; 1754e5a185c2SLukas Czerner 1755e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1756e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1757e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1758e5a185c2SLukas Czerner 1759e5a185c2SLukas Czerner /* 1760e5a185c2SLukas Czerner * Mount option specification 1761e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1762e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1763e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1764e5a185c2SLukas Czerner * separate for now. 1765e5a185c2SLukas Czerner */ 1766e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1767e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1768e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1769e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1770e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1771e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1772e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1773e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1774e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1775e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1776e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1777e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1778e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1779e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1780e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1781e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1782e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1783e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1784e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1785e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1786e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1787e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1788e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1789e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1790e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1791e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1792e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1793e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1794e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1795e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1796e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1797e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1798e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1799e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1800e5a185c2SLukas Czerner ext4_param_data_err), 1801e5a185c2SLukas Czerner fsparam_string_empty 1802e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1803e5a185c2SLukas Czerner fsparam_string_empty 1804e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1805e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1806e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1807e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1808e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1809e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1810e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1811e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1812e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1813e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1814e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1815e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1816e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1817e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1818e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1819e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1820e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1821e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1822e5a185c2SLukas Czerner fsparam_flag ("lazytime", Opt_lazytime), 1823e5a185c2SLukas Czerner fsparam_flag ("nolazytime", Opt_nolazytime), 1824e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1825e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1826e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1827e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1828e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1829e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1830e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1831e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1832e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1833e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1834e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1835e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1836e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1837e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1838e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1839e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1840e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1841e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1842e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1843e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1844e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1845e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1846e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1847e5a185c2SLukas Czerner #endif 1848e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1849e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1850e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1851e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1852e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1853e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1854e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1855e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1856e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1857e5a185c2SLukas Czerner Opt_removed), 1858e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1859e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1860e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1861e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1862e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1863e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1864e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1865e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1866e5a185c2SLukas Czerner {} 1867e5a185c2SLukas Czerner }; 1868e5a185c2SLukas Czerner 1869a447c093SSteven Whitehouse static const match_table_t tokens = { 1870ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1871ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1872ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1873ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1874ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1875ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1876ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1877ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1878ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1879ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1880ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1881ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1882ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1883ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 188472578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 188572578c33STheodore Ts'o {Opt_removed, "orlov"}, 1886ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1887ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1888ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1889ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1890e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 18915a916be1STheodore Ts'o {Opt_noload, "noload"}, 189272578c33STheodore Ts'o {Opt_removed, "nobh"}, 189372578c33STheodore Ts'o {Opt_removed, "bh"}, 1894ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 189530773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 189630773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1897ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1898ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1899818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1900c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1901818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1902ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1903ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1904ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1905ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 19065bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 19075bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1908ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1909ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1910ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1911ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1912ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1913ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 19145a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1915ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1916ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1917ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1918ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 191949da9392SJan Kara {Opt_prjquota, "prjquota"}, 1920ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 192106705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 192206705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 192325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1924923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 19259cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 19269cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 19279cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1928c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 192964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1930327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1931327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1932a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1933a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1934670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1935dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 193636ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 193736ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 19386fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 19396fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1940240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1941b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1942afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 194306705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 194406705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1945744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1946244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1947744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 19485328e635SEric Sandeen {Opt_discard, "discard"}, 19495328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1950fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1951fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1952fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 19538016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 195499c880deSHarshad Shirwadkar {Opt_fc_debug_force, "fc_debug_force"}, 19558016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"}, 19568016e29fSHarshad Shirwadkar #endif 1957df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1958ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 19596ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 19604f74d15fSEric Biggers {Opt_inlinecrypt, "inlinecrypt"}, 1961cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1962cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 196321175ca4SHarshad Shirwadkar {Opt_removed, "prefetch_block_bitmaps"}, 196421175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, 1965196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, 1966c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1967c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1968c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1969c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1970c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1971f3f12faaSJosef Bacik {Opt_err, NULL}, 1972ac27a0ecSDave Kleikamp }; 1973ac27a0ecSDave Kleikamp 1974b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1975196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1976196e402aSHarshad Shirwadkar 1977d6006186SEric Biggers static const char deprecated_msg[] = 1978d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1979437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1980b3881f74STheodore Ts'o 198126092bf5STheodore Ts'o #define MOPT_SET 0x0001 198226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 198326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 198426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 198526092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 198626092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 198726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 198826092bf5STheodore Ts'o #define MOPT_Q 0 198926092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 199026092bf5STheodore Ts'o #else 199126092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 199226092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 199326092bf5STheodore Ts'o #endif 199426092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 19958dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 19968dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 19978dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1998ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 19999cb20f94SIra Weiny #define MOPT_SKIP 0x0800 2000995a3ed6SHarshad Shirwadkar #define MOPT_2 0x1000 200126092bf5STheodore Ts'o 200226092bf5STheodore Ts'o static const struct mount_opts { 200326092bf5STheodore Ts'o int token; 200426092bf5STheodore Ts'o int mount_opt; 200526092bf5STheodore Ts'o int flags; 200626092bf5STheodore Ts'o } ext4_mount_opts[] = { 200726092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 200826092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 200926092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 201026092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 201126092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 201226092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 20138dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 20148dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 20158dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 20168dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 201726092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 201826092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 20198dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 20208dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20218dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 202259d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 2023327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 2024327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 2025c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 2026c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 20278dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 20281e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 202926092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 20308dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 20311e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20328dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 203326092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 203426092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 203526092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 20368dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 20377915a861SAles Novak MOPT_NO_EXT2}, 20388dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 20397915a861SAles Novak MOPT_NO_EXT2}, 204026092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 204126092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 204226092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 204326092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 204426092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 204526092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 204626092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 204726092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 204826092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 204926092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 20509cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 20519cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 20529cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 20539cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 20549cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 20559cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 20569cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 205726092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 20580efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 20590efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 20605ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 20615ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 20625ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 20638dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 20648dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 20658dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 20668dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 206726092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 206826092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 206926092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 207026092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 207126092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 207226092bf5STheodore Ts'o #else 207326092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 207426092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 207526092bf5STheodore Ts'o #endif 207626092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 207726092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 2078670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 207926092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 208026092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 208126092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 208226092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 208326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 208449da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 208549da9392SJan Kara MOPT_SET | MOPT_Q}, 208626092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 208749da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 208849da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 2089174fe5baSKaixu Xia {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING}, 2090174fe5baSKaixu Xia {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING}, 209126092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 209226092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 209326092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 209426092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 209526092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 2096df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 2097ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 2098cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 209921175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 21003d392b26STheodore Ts'o MOPT_SET}, 2101196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, 210299c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 21030f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 21040f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 21058016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, 0, MOPT_GTE0}, 21068016e29fSHarshad Shirwadkar #endif 210726092bf5STheodore Ts'o {Opt_err, 0, 0} 210826092bf5STheodore Ts'o }; 210926092bf5STheodore Ts'o 2110c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 2111c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 2112c83ad55eSGabriel Krisman Bertazi __u16 magic; 2113c83ad55eSGabriel Krisman Bertazi char *name; 2114c83ad55eSGabriel Krisman Bertazi char *version; 2115c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 2116c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 2117c83ad55eSGabriel Krisman Bertazi }; 2118c83ad55eSGabriel Krisman Bertazi 2119c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 2120c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 2121c83ad55eSGabriel Krisman Bertazi __u16 *flags) 2122c83ad55eSGabriel Krisman Bertazi { 2123c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 2124c83ad55eSGabriel Krisman Bertazi int i; 2125c83ad55eSGabriel Krisman Bertazi 2126c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 2127c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 2128c83ad55eSGabriel Krisman Bertazi break; 2129c83ad55eSGabriel Krisman Bertazi 2130c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 2131c83ad55eSGabriel Krisman Bertazi return -EINVAL; 2132c83ad55eSGabriel Krisman Bertazi 2133c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 2134c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 2135c83ad55eSGabriel Krisman Bertazi 2136c83ad55eSGabriel Krisman Bertazi return 0; 2137c83ad55eSGabriel Krisman Bertazi } 2138c83ad55eSGabriel Krisman Bertazi #endif 2139c83ad55eSGabriel Krisman Bertazi 21406e47a3ccSLukas Czerner static int ext4_set_test_dummy_encryption(struct super_block *sb, char *arg) 2141ed318a6cSEric Biggers { 2142ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 2143ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 2144ed318a6cSEric Biggers int err; 2145ed318a6cSEric Biggers 21466e47a3ccSLukas Czerner err = fscrypt_set_test_dummy_encryption(sb, arg, 2147ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2148ed318a6cSEric Biggers if (err) { 2149ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 21506e47a3ccSLukas Czerner "Error while setting test dummy encryption [%d]", err); 21516e47a3ccSLukas Czerner return err; 2152ed318a6cSEric Biggers } 2153ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2154ed318a6cSEric Biggers #endif 21556e47a3ccSLukas Czerner return 0; 2156ed318a6cSEric Biggers } 2157ed318a6cSEric Biggers 21586e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 21596e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 21606e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 21616e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 21626e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 21636e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 21646e47a3ccSLukas Czerner #define EXT4_SPEC_DUMMY_ENCRYPTION (1 << 6) 21656e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 21666e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 21676e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 21686e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 21696e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 21706e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 21716e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 21726e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 21736e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 21746e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 21756e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 21767edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 21776e47a3ccSLukas Czerner 2178461c3af0SLukas Czerner struct ext4_fs_context { 2179e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 21806e47a3ccSLukas Czerner char *test_dummy_enc_arg; 2181e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 2182196e402aSHarshad Shirwadkar int mb_optimize_scan; 21836e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 21846e47a3ccSLukas Czerner int s_fc_debug_max_replay; 21856e47a3ccSLukas Czerner #endif 21866e47a3ccSLukas Czerner unsigned short qname_spec; 21876e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 21886e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 21896e47a3ccSLukas Czerner unsigned long journal_devnum; 21906e47a3ccSLukas Czerner unsigned long s_commit_interval; 21916e47a3ccSLukas Czerner unsigned long s_stripe; 21926e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 21936e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 21946e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 21956e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 21966e47a3ccSLukas Czerner unsigned int journal_ioprio; 21976e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 21986e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 21996e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 22006e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 22016e47a3ccSLukas Czerner unsigned int vals_s_mount_flags; 22026e47a3ccSLukas Czerner unsigned int mask_s_mount_flags; 2203b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 22046e47a3ccSLukas Czerner unsigned int spec; 22056e47a3ccSLukas Czerner u32 s_max_batch_time; 22066e47a3ccSLukas Czerner u32 s_min_batch_time; 22076e47a3ccSLukas Czerner kuid_t s_resuid; 22086e47a3ccSLukas Czerner kgid_t s_resgid; 22097edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 2210b237e304SHarshad Shirwadkar }; 2211b237e304SHarshad Shirwadkar 2212*cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 2213*cebe85d5SLukas Czerner { 2214*cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2215*cebe85d5SLukas Czerner int i; 2216*cebe85d5SLukas Czerner 2217*cebe85d5SLukas Czerner if (!ctx) 2218*cebe85d5SLukas Czerner return; 2219*cebe85d5SLukas Czerner 2220*cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 2221*cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 2222*cebe85d5SLukas Czerner 2223*cebe85d5SLukas Czerner kfree(ctx->test_dummy_enc_arg); 2224*cebe85d5SLukas Czerner kfree(ctx); 2225*cebe85d5SLukas Czerner } 2226*cebe85d5SLukas Czerner 2227*cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 2228*cebe85d5SLukas Czerner { 2229*cebe85d5SLukas Czerner struct xfs_fs_context *ctx; 2230*cebe85d5SLukas Czerner 2231*cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 2232*cebe85d5SLukas Czerner if (!ctx) 2233*cebe85d5SLukas Czerner return -ENOMEM; 2234*cebe85d5SLukas Czerner 2235*cebe85d5SLukas Czerner fc->fs_private = ctx; 2236*cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 2237*cebe85d5SLukas Czerner 2238*cebe85d5SLukas Czerner return 0; 2239*cebe85d5SLukas Czerner } 2240*cebe85d5SLukas Czerner 2241e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2242e6e268cbSLukas Czerner /* 2243e6e268cbSLukas Czerner * Note the name of the specified quota file. 2244e6e268cbSLukas Czerner */ 2245e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2246e6e268cbSLukas Czerner struct fs_parameter *param) 2247e6e268cbSLukas Czerner { 2248e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2249e6e268cbSLukas Czerner char *qname; 2250e6e268cbSLukas Czerner 2251e6e268cbSLukas Czerner if (param->size < 1) { 2252e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2253e6e268cbSLukas Czerner return -EINVAL; 2254e6e268cbSLukas Czerner } 2255e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2256e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2257e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2258e6e268cbSLukas Czerner return -EINVAL; 2259e6e268cbSLukas Czerner } 2260e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2261e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2262e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2263e6e268cbSLukas Czerner "%s quota file already specified", 2264e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2265e6e268cbSLukas Czerner return -EINVAL; 2266e6e268cbSLukas Czerner } 2267e6e268cbSLukas Czerner return 0; 2268e6e268cbSLukas Czerner } 2269e6e268cbSLukas Czerner 2270e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2271e6e268cbSLukas Czerner if (!qname) { 2272e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2273e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2274e6e268cbSLukas Czerner return -ENOMEM; 2275e6e268cbSLukas Czerner } 2276e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2277e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 22786e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2279e6e268cbSLukas Czerner return 0; 2280e6e268cbSLukas Czerner } 2281e6e268cbSLukas Czerner 2282e6e268cbSLukas Czerner /* 2283e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2284e6e268cbSLukas Czerner */ 2285e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2286e6e268cbSLukas Czerner { 2287e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2288e6e268cbSLukas Czerner 2289e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2290e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2291e6e268cbSLukas Czerner 2292e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2293e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 22946e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2295e6e268cbSLukas Czerner return 0; 2296e6e268cbSLukas Czerner } 2297e6e268cbSLukas Czerner #endif 2298e6e268cbSLukas Czerner 22996e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 23006e47a3ccSLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, int flag)\ 23016e47a3ccSLukas Czerner { \ 23026e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 23036e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 23046e47a3ccSLukas Czerner } \ 23056e47a3ccSLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, int flag)\ 23066e47a3ccSLukas Czerner { \ 23076e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 23086e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 23096e47a3ccSLukas Czerner } \ 23106e47a3ccSLukas Czerner static inline bool ctx_test_##name(struct ext4_fs_context *ctx, int flag)\ 23116e47a3ccSLukas Czerner { \ 23126e47a3ccSLukas Czerner return ((ctx->vals_s_##name & flag) != 0); \ 23136e47a3ccSLukas Czerner } \ 23146e47a3ccSLukas Czerner 23156e47a3ccSLukas Czerner EXT4_SET_CTX(flags); 23166e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 23176e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 23186e47a3ccSLukas Czerner EXT4_SET_CTX(mount_flags); 23196e47a3ccSLukas Czerner 232002f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 232126092bf5STheodore Ts'o { 2322461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2323461c3af0SLukas Czerner struct fs_parse_result result; 232426092bf5STheodore Ts'o const struct mount_opts *m; 2325461c3af0SLukas Czerner int is_remount; 232608cefc7aSEric W. Biederman kuid_t uid; 232708cefc7aSEric W. Biederman kgid_t gid; 2328461c3af0SLukas Czerner int token; 2329461c3af0SLukas Czerner 2330461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2331461c3af0SLukas Czerner if (token < 0) 2332461c3af0SLukas Czerner return token; 2333461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 233426092bf5STheodore Ts'o 233557f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2336461c3af0SLukas Czerner if (token == Opt_usrjquota) { 2337461c3af0SLukas Czerner if (!*param->string) 2338e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2339461c3af0SLukas Czerner else 2340e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2341461c3af0SLukas Czerner } else if (token == Opt_grpjquota) { 2342461c3af0SLukas Czerner if (!*param->string) 2343e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2344461c3af0SLukas Czerner else 2345e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 2346461c3af0SLukas Czerner } 234757f73c2cSTheodore Ts'o #endif 234826092bf5STheodore Ts'o switch (token) { 2349f7048605STheodore Ts'o case Opt_noacl: 2350f7048605STheodore Ts'o case Opt_nouser_xattr: 2351da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "3.5"); 2352f7048605STheodore Ts'o break; 235326092bf5STheodore Ts'o case Opt_sb: 23547edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 23557edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 23567edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 23577edfd85bSLukas Czerner } else { 23587edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 23597edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 23607edfd85bSLukas Czerner } 236102f960f8SLukas Czerner return 0; 236226092bf5STheodore Ts'o case Opt_removed: 2363da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2364461c3af0SLukas Czerner param->key); 236502f960f8SLukas Czerner return 0; 236626092bf5STheodore Ts'o case Opt_abort: 23676e47a3ccSLukas Czerner ctx_set_mount_flags(ctx, EXT4_MF_FS_ABORTED); 236802f960f8SLukas Czerner return 0; 236926092bf5STheodore Ts'o case Opt_i_version: 23706e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_I_VERSION); 237102f960f8SLukas Czerner return 0; 2372a26f4992STheodore Ts'o case Opt_lazytime: 23736e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_LAZYTIME); 237402f960f8SLukas Czerner return 0; 2375a26f4992STheodore Ts'o case Opt_nolazytime: 23766e47a3ccSLukas Czerner ctx_clear_flags(ctx, SB_LAZYTIME); 237702f960f8SLukas Czerner return 0; 23784f74d15fSEric Biggers case Opt_inlinecrypt: 23794f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 23806e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 23814f74d15fSEric Biggers #else 2382da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 23834f74d15fSEric Biggers #endif 238402f960f8SLukas Czerner return 0; 2385461c3af0SLukas Czerner case Opt_errors: 2386461c3af0SLukas Czerner case Opt_data: 2387461c3af0SLukas Czerner case Opt_data_err: 2388461c3af0SLukas Czerner case Opt_jqfmt: 2389461c3af0SLukas Czerner case Opt_dax_type: 2390461c3af0SLukas Czerner token = result.uint_32; 239126092bf5STheodore Ts'o } 239226092bf5STheodore Ts'o 23935f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 23945f3633e3SJan Kara if (token == m->token) 23955f3633e3SJan Kara break; 23965f3633e3SJan Kara 2397b6bd2435SLukas Czerner ctx->opt_flags |= m->flags; 2398b6bd2435SLukas Czerner 23995f3633e3SJan Kara if (m->token == Opt_err) { 2400da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Unrecognized mount option \"%s\" " 2401461c3af0SLukas Czerner "or missing value", param->key); 2402da812f61SLukas Czerner return -EINVAL; 24035f3633e3SJan Kara } 24045f3633e3SJan Kara 2405c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 2406c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 24076e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 24081e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 24096e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, 24106e47a3ccSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2411c93cf2d7SDmitry Monakhov } else 2412da812f61SLukas Czerner return -EINVAL; 2413c93cf2d7SDmitry Monakhov } 241426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 24156e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 241626092bf5STheodore Ts'o 241726092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 2418da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2419461c3af0SLukas Czerner param->key); 242026092bf5STheodore Ts'o } else if (token == Opt_commit) { 2421461c3af0SLukas Czerner if (result.uint_32 == 0) 24226e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2423461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2424da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 24259ba55543Szhangyi (F) "Invalid commit interval %d, " 24269ba55543Szhangyi (F) "must be smaller than %d", 2427461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2428da812f61SLukas Czerner return -EINVAL; 24299ba55543Szhangyi (F) } 24306e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 24316e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2432670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 24336e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2434da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2435461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2436da812f61SLukas Czerner return -EINVAL; 24379803387cSTheodore Ts'o } 24386e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 24396e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 244026092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 24416e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 24426e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 244326092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 24446e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 24456e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 244626092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2447461c3af0SLukas Czerner if (result.uint_32 && 2448461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2449461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2450da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2451e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2452e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2453da812f61SLukas Czerner return -EINVAL; 245426092bf5STheodore Ts'o } 24556e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 24566e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 245726092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 24586e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 24596e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2460461c3af0SLukas Czerner if (param->type == fs_value_is_string) 24616e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 24626e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2463df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 24646e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 24656e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 24668016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 24678016e29fSHarshad Shirwadkar } else if (token == Opt_fc_debug_max_replay) { 24686e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 24696e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 24708016e29fSHarshad Shirwadkar #endif 247126092bf5STheodore Ts'o } else if (token == Opt_stripe) { 24726e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 24736e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 24740efb3b23SJan Kara } else if (token == Opt_resuid) { 2475461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 24760efb3b23SJan Kara if (!uid_valid(uid)) { 2477da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2478461c3af0SLukas Czerner result.uint_32); 2479da812f61SLukas Czerner return -EINVAL; 24800efb3b23SJan Kara } 24816e47a3ccSLukas Czerner ctx->s_resuid = uid; 24826e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 24830efb3b23SJan Kara } else if (token == Opt_resgid) { 2484461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 24850efb3b23SJan Kara if (!gid_valid(gid)) { 2486da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2487461c3af0SLukas Czerner result.uint_32); 2488da812f61SLukas Czerner return -EINVAL; 24890efb3b23SJan Kara } 24906e47a3ccSLukas Czerner ctx->s_resgid = gid; 24916e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 24920efb3b23SJan Kara } else if (token == Opt_journal_dev) { 24930efb3b23SJan Kara if (is_remount) { 2494da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 24950efb3b23SJan Kara "Cannot specify journal on remount"); 2496da812f61SLukas Czerner return -EINVAL; 24970efb3b23SJan Kara } 2498461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 24996e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2500ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2501ad4eec61SEric Sandeen struct inode *journal_inode; 2502ad4eec61SEric Sandeen struct path path; 2503ad4eec61SEric Sandeen int error; 2504ad4eec61SEric Sandeen 2505ad4eec61SEric Sandeen if (is_remount) { 2506da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2507ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2508da812f61SLukas Czerner return -EINVAL; 2509ad4eec61SEric Sandeen } 2510ad4eec61SEric Sandeen 2511461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2512ad4eec61SEric Sandeen if (error) { 2513da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2514461c3af0SLukas Czerner "journal device path"); 2515da812f61SLukas Czerner return -EINVAL; 2516ad4eec61SEric Sandeen } 2517ad4eec61SEric Sandeen 25182b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2519461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 25206e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2521ad4eec61SEric Sandeen path_put(&path); 25220efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 2523461c3af0SLukas Czerner if (result.uint_32 > 7) { 2524da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 25250efb3b23SJan Kara " (must be 0-7)"); 2526da812f61SLukas Czerner return -EINVAL; 25270efb3b23SJan Kara } 2528461c3af0SLukas Czerner ctx->journal_ioprio = 2529461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 25306e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 25316ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 25326e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 25336e47a3ccSLukas Czerner if (param->type == fs_value_is_flag) { 25346e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 25356e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = NULL; 253602f960f8SLukas Czerner return 0; 25376e47a3ccSLukas Czerner } 25386e47a3ccSLukas Czerner if (*param->string && 25396e47a3ccSLukas Czerner !(!strcmp(param->string, "v1") || 25406e47a3ccSLukas Czerner !strcmp(param->string, "v2"))) { 25416e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 25426e47a3ccSLukas Czerner "Value of option \"%s\" is unrecognized", 25436e47a3ccSLukas Czerner param->key); 2544da812f61SLukas Czerner return -EINVAL; 254526092bf5STheodore Ts'o } 25466e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 25476e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = kmemdup_nul(param->string, param->size, 25486e47a3ccSLukas Czerner GFP_KERNEL); 25496e47a3ccSLukas Czerner #else 25506e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 25516e47a3ccSLukas Czerner "Test dummy encryption mount option ignored"); 25526e47a3ccSLukas Czerner #endif 25536e47a3ccSLukas Czerner } else if (m->flags & MOPT_DATAJ) { 25546e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 25556e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 25566e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 255726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 255826092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 2559e6e268cbSLukas Czerner ctx->s_jquota_fmt = m->mount_opt; 25606e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 256126092bf5STheodore Ts'o #endif 25629cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 25639cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2564ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 25659cb20f94SIra Weiny switch (token) { 25669cb20f94SIra Weiny case Opt_dax: 25679cb20f94SIra Weiny case Opt_dax_always: 25686e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 25696e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 25709cb20f94SIra Weiny break; 25719cb20f94SIra Weiny case Opt_dax_never: 25726e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 25736e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 25749cb20f94SIra Weiny break; 25759cb20f94SIra Weiny case Opt_dax_inode: 25766e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 25776e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 25789cb20f94SIra Weiny /* Strictly for printing options */ 25796e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 25809cb20f94SIra Weiny break; 25819cb20f94SIra Weiny } 2582ef83b6e8SDan Williams #else 2583da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 25846e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 25856e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 2586da812f61SLukas Czerner return -EINVAL; 2587923ae0ffSRoss Zwisler #endif 25887915a861SAles Novak } else if (token == Opt_data_err_abort) { 25896e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 25907915a861SAles Novak } else if (token == Opt_data_err_ignore) { 25916e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2592196e402aSHarshad Shirwadkar } else if (token == Opt_mb_optimize_scan) { 2593461c3af0SLukas Czerner if (result.int_32 != 0 && result.int_32 != 1) { 2594da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2595196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2596da812f61SLukas Czerner return -EINVAL; 2597196e402aSHarshad Shirwadkar } 2598461c3af0SLukas Czerner ctx->mb_optimize_scan = result.int_32; 259926092bf5STheodore Ts'o } else { 2600461c3af0SLukas Czerner unsigned int set = 0; 2601461c3af0SLukas Czerner 2602461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2603461c3af0SLukas Czerner result.uint_32 > 0) 2604461c3af0SLukas Czerner set = 1; 2605461c3af0SLukas Czerner 260626092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2607461c3af0SLukas Czerner set = !set; 260826092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2609da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2610461c3af0SLukas Czerner "buggy handling of option %s", 2611461c3af0SLukas Czerner param->key); 261226092bf5STheodore Ts'o WARN_ON(1); 2613da812f61SLukas Czerner return -EINVAL; 261426092bf5STheodore Ts'o } 2615995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2616461c3af0SLukas Czerner if (set != 0) 26176e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2618995a3ed6SHarshad Shirwadkar else 26196e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2620995a3ed6SHarshad Shirwadkar } else { 2621461c3af0SLukas Czerner if (set != 0) 26226e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 262326092bf5STheodore Ts'o else 26246e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 262526092bf5STheodore Ts'o } 2626995a3ed6SHarshad Shirwadkar } 262702f960f8SLukas Czerner return 0; 262826092bf5STheodore Ts'o } 262926092bf5STheodore Ts'o 26307edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2631ac27a0ecSDave Kleikamp { 2632461c3af0SLukas Czerner struct fs_parameter param; 2633461c3af0SLukas Czerner int ret; 2634461c3af0SLukas Czerner char *key; 2635ac27a0ecSDave Kleikamp 2636ac27a0ecSDave Kleikamp if (!options) 26377edfd85bSLukas Czerner return 0; 2638461c3af0SLukas Czerner 2639461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2640461c3af0SLukas Czerner if (*key) { 2641461c3af0SLukas Czerner size_t v_len = 0; 2642461c3af0SLukas Czerner char *value = strchr(key, '='); 2643461c3af0SLukas Czerner 2644461c3af0SLukas Czerner param.type = fs_value_is_flag; 2645461c3af0SLukas Czerner param.string = NULL; 2646461c3af0SLukas Czerner 2647461c3af0SLukas Czerner if (value) { 2648461c3af0SLukas Czerner if (value == key) 2649ac27a0ecSDave Kleikamp continue; 2650461c3af0SLukas Czerner 2651461c3af0SLukas Czerner *value++ = 0; 2652461c3af0SLukas Czerner v_len = strlen(value); 2653461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2654461c3af0SLukas Czerner GFP_KERNEL); 2655461c3af0SLukas Czerner if (!param.string) 26567edfd85bSLukas Czerner return -ENOMEM; 2657461c3af0SLukas Czerner param.type = fs_value_is_string; 2658461c3af0SLukas Czerner } 2659461c3af0SLukas Czerner 2660461c3af0SLukas Czerner param.key = key; 2661461c3af0SLukas Czerner param.size = v_len; 2662461c3af0SLukas Czerner 266302f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2664461c3af0SLukas Czerner if (param.string) 2665461c3af0SLukas Czerner kfree(param.string); 2666461c3af0SLukas Czerner if (ret < 0) 26677edfd85bSLukas Czerner return ret; 2668ac27a0ecSDave Kleikamp } 2669461c3af0SLukas Czerner } 2670461c3af0SLukas Czerner 26717edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2672da812f61SLukas Czerner if (ret < 0) 26737edfd85bSLukas Czerner return ret; 26747edfd85bSLukas Czerner 26757edfd85bSLukas Czerner return 0; 26767edfd85bSLukas Czerner } 26777edfd85bSLukas Czerner 26787edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 26797edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 26807edfd85bSLukas Czerner { 26817edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 26827edfd85bSLukas Czerner char *s_mount_opts = NULL; 26837edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 26847edfd85bSLukas Czerner struct fs_context *fc = NULL; 26857edfd85bSLukas Czerner int ret = -ENOMEM; 26867edfd85bSLukas Czerner 26877edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2688da812f61SLukas Czerner return 0; 2689da812f61SLukas Czerner 26907edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 26917edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 26927edfd85bSLukas Czerner GFP_KERNEL); 26937edfd85bSLukas Czerner if (!s_mount_opts) 26947edfd85bSLukas Czerner return ret; 2695e6e268cbSLukas Czerner 26967edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 26977edfd85bSLukas Czerner if (!fc) 26987edfd85bSLukas Czerner goto out_free; 2699e6e268cbSLukas Czerner 27007edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 27017edfd85bSLukas Czerner if (!s_ctx) 27027edfd85bSLukas Czerner goto out_free; 27037edfd85bSLukas Czerner 27047edfd85bSLukas Czerner fc->fs_private = s_ctx; 27057edfd85bSLukas Czerner fc->s_fs_info = sbi; 27067edfd85bSLukas Czerner 27077edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 27087edfd85bSLukas Czerner if (ret < 0) 27097edfd85bSLukas Czerner goto parse_failed; 27107edfd85bSLukas Czerner 27117edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 27127edfd85bSLukas Czerner if (ret < 0) { 27137edfd85bSLukas Czerner parse_failed: 27147edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 27157edfd85bSLukas Czerner "failed to parse options in superblock: %s", 27167edfd85bSLukas Czerner s_mount_opts); 27177edfd85bSLukas Czerner ret = 0; 27187edfd85bSLukas Czerner goto out_free; 27197edfd85bSLukas Czerner } 27207edfd85bSLukas Czerner 27217edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 27227edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 27237edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 27247edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 27257edfd85bSLukas Czerner 27267edfd85bSLukas Czerner ret = ext4_apply_options(fc, sb); 27277edfd85bSLukas Czerner 27287edfd85bSLukas Czerner out_free: 27297edfd85bSLukas Czerner kfree(s_ctx); 27307edfd85bSLukas Czerner kfree(fc); 27317edfd85bSLukas Czerner kfree(s_mount_opts); 27327edfd85bSLukas Czerner return ret; 27334c94bff9SLukas Czerner } 27344c94bff9SLukas Czerner 2735e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2736e6e268cbSLukas Czerner struct super_block *sb) 2737e6e268cbSLukas Czerner { 2738e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 27396e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2740e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2741e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2742e6e268cbSLukas Czerner char *qname; 2743e6e268cbSLukas Czerner int i; 2744e6e268cbSLukas Czerner 27456e47a3ccSLukas Czerner if (quota_feature) 27466e47a3ccSLukas Czerner return; 27476e47a3ccSLukas Czerner 27486e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2749e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2750e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2751e6e268cbSLukas Czerner continue; 27526e47a3ccSLukas Czerner 2753e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 2754e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 2755e6e268cbSLukas Czerner kfree(sbi->s_qf_names[i]); 2756e6e268cbSLukas Czerner rcu_assign_pointer(sbi->s_qf_names[i], qname); 2757e6e268cbSLukas Czerner set_opt(sb, QUOTA); 2758e6e268cbSLukas Czerner } 27596e47a3ccSLukas Czerner } 27606e47a3ccSLukas Czerner 27616e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 27626e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2763e6e268cbSLukas Czerner #endif 2764e6e268cbSLukas Czerner } 2765e6e268cbSLukas Czerner 2766e6e268cbSLukas Czerner /* 2767e6e268cbSLukas Czerner * Check quota settings consistency. 2768e6e268cbSLukas Czerner */ 2769e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2770e6e268cbSLukas Czerner struct super_block *sb) 2771e6e268cbSLukas Czerner { 2772e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2773e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2774e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2775e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2776e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 27776e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 27786e47a3ccSLukas Czerner int quota_flags, i; 2779e6e268cbSLukas Czerner 27806e47a3ccSLukas Czerner /* 27816e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 27826e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 27836e47a3ccSLukas Czerner * to support legacy quotas in quota files. 27846e47a3ccSLukas Czerner */ 27856e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 27866e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 27876e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 27886e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 27896e47a3ccSLukas Czerner return -EINVAL; 27906e47a3ccSLukas Czerner } 27916e47a3ccSLukas Czerner 27926e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 27936e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 27946e47a3ccSLukas Czerner if (quota_loaded && 27956e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 27966e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 27976e47a3ccSLukas Czerner goto err_quota_change; 27986e47a3ccSLukas Czerner 27996e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2800e6e268cbSLukas Czerner 2801e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2802e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2803e6e268cbSLukas Czerner continue; 2804e6e268cbSLukas Czerner 28056e47a3ccSLukas Czerner if (quota_loaded && 28066e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2807e6e268cbSLukas Czerner goto err_jquota_change; 2808e6e268cbSLukas Czerner 2809e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 2810e6e268cbSLukas Czerner strcmp(sbi->s_qf_names[i], 2811e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2812e6e268cbSLukas Czerner goto err_jquota_specified; 2813e6e268cbSLukas Czerner } 28146e47a3ccSLukas Czerner 28156e47a3ccSLukas Czerner if (quota_feature) { 28166e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 28176e47a3ccSLukas Czerner "Journaled quota options ignored when " 28186e47a3ccSLukas Czerner "QUOTA feature is enabled"); 28196e47a3ccSLukas Czerner return 0; 28206e47a3ccSLukas Czerner } 2821e6e268cbSLukas Czerner } 2822e6e268cbSLukas Czerner 28236e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2824e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 28256e47a3ccSLukas Czerner goto err_jquota_change; 2826e6e268cbSLukas Czerner if (quota_feature) { 2827e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2828e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2829e6e268cbSLukas Czerner return 0; 2830e6e268cbSLukas Czerner } 2831e6e268cbSLukas Czerner } 28326e47a3ccSLukas Czerner 28336e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 28346e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 28356e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 28366e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 28376e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 28386e47a3ccSLukas Czerner 28396e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28406e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 28416e47a3ccSLukas Czerner 28426e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 28436e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 28446e47a3ccSLukas Czerner 28456e47a3ccSLukas Czerner if (usr_qf_name) { 28466e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 28476e47a3ccSLukas Czerner usrquota = false; 28486e47a3ccSLukas Czerner } 28496e47a3ccSLukas Czerner if (grp_qf_name) { 28506e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 28516e47a3ccSLukas Czerner grpquota = false; 28526e47a3ccSLukas Czerner } 28536e47a3ccSLukas Czerner 28546e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 28556e47a3ccSLukas Czerner if (usrquota || grpquota) { 28566e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 28576e47a3ccSLukas Czerner "format mixing"); 28586e47a3ccSLukas Czerner return -EINVAL; 28596e47a3ccSLukas Czerner } 28606e47a3ccSLukas Czerner 28616e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 28626e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 28636e47a3ccSLukas Czerner "not specified"); 28646e47a3ccSLukas Czerner return -EINVAL; 28656e47a3ccSLukas Czerner } 28666e47a3ccSLukas Czerner } 28676e47a3ccSLukas Czerner 2868e6e268cbSLukas Czerner return 0; 2869e6e268cbSLukas Czerner 2870e6e268cbSLukas Czerner err_quota_change: 2871e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2872e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2873e6e268cbSLukas Czerner return -EINVAL; 2874e6e268cbSLukas Czerner err_jquota_change: 2875e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2876e6e268cbSLukas Czerner "options when quota turned on"); 2877e6e268cbSLukas Czerner return -EINVAL; 2878e6e268cbSLukas Czerner err_jquota_specified: 2879e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2880e6e268cbSLukas Czerner QTYPE2NAME(i)); 2881e6e268cbSLukas Czerner return -EINVAL; 2882e6e268cbSLukas Czerner #else 2883e6e268cbSLukas Czerner return 0; 2884e6e268cbSLukas Czerner #endif 2885e6e268cbSLukas Czerner } 2886e6e268cbSLukas Czerner 2887b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2888b6bd2435SLukas Czerner struct super_block *sb) 2889b6bd2435SLukas Czerner { 2890b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28916e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28926e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 2893b6bd2435SLukas Czerner 2894b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2895b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2896b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2897b6bd2435SLukas Czerner return -EINVAL; 2898b6bd2435SLukas Czerner } 2899b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2900b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2901b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2902b6bd2435SLukas Czerner return -EINVAL; 2903b6bd2435SLukas Czerner } 2904b6bd2435SLukas Czerner 29056e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 29066e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 29076e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 29086e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 29096e47a3ccSLukas Czerner ctx->s_want_extra_isize); 29106e47a3ccSLukas Czerner return -EINVAL; 29116e47a3ccSLukas Czerner } 29126e47a3ccSLukas Czerner 29136e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 29146e47a3ccSLukas Czerner int blocksize = 29156e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 29166e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 29176e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 29186e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 29196e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 29206e47a3ccSLukas Czerner } 29216e47a3ccSLukas Czerner 29226e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 29236e47a3ccSLukas Czerner /* 29246e47a3ccSLukas Czerner * This mount option is just for testing, and it's not worthwhile to 29256e47a3ccSLukas Czerner * implement the extra complexity (e.g. RCU protection) that would be 29266e47a3ccSLukas Czerner * needed to allow it to be set or changed during remount. We do allow 29276e47a3ccSLukas Czerner * it to be specified during remount, but only if there is no change. 29286e47a3ccSLukas Czerner */ 29296e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) && 29306e47a3ccSLukas Czerner is_remount && !sbi->s_dummy_enc_policy.policy) { 29316e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 29326e47a3ccSLukas Czerner "Can't set test_dummy_encryption on remount"); 29336e47a3ccSLukas Czerner return -1; 29346e47a3ccSLukas Czerner } 29356e47a3ccSLukas Czerner #endif 29366e47a3ccSLukas Czerner 29376e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 29386e47a3ccSLukas Czerner if (!sbi->s_journal) { 29396e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 29406e47a3ccSLukas Czerner "Remounting file system with no journal " 29416e47a3ccSLukas Czerner "so ignoring journalled data option"); 29426e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 29436e47a3ccSLukas Czerner } else if (ctx->mask_s_mount_opt & EXT4_MOUNT_DATA_FLAGS) { 29446e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 29456e47a3ccSLukas Czerner "on remount"); 29466e47a3ccSLukas Czerner return -EINVAL; 29476e47a3ccSLukas Czerner } 29486e47a3ccSLukas Czerner } 29496e47a3ccSLukas Czerner 29506e47a3ccSLukas Czerner if (is_remount) { 29516e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 29526e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 29536e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 29546e47a3ccSLukas Czerner "both data=journal and dax"); 29556e47a3ccSLukas Czerner return -EINVAL; 29566e47a3ccSLukas Czerner } 29576e47a3ccSLukas Czerner 29586e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 29596e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 29606e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 29616e47a3ccSLukas Czerner fail_dax_change_remount: 29626e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 29636e47a3ccSLukas Czerner "dax mount option while remounting"); 29646e47a3ccSLukas Czerner return -EINVAL; 29656e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 29666e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 29676e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 29686e47a3ccSLukas Czerner goto fail_dax_change_remount; 29696e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 29706e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 29716e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 29726e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 29736e47a3ccSLukas Czerner goto fail_dax_change_remount; 29746e47a3ccSLukas Czerner } 29756e47a3ccSLukas Czerner } 29766e47a3ccSLukas Czerner 2977b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2978b6bd2435SLukas Czerner } 2979b6bd2435SLukas Czerner 29806e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb) 29816e47a3ccSLukas Czerner { 29826e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 29836e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 29846e47a3ccSLukas Czerner int ret = 0; 29856e47a3ccSLukas Czerner 29866e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 29876e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 29886e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 29896e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 29906e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 29916e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 29926e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 29936e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 29946e47a3ccSLukas Czerner 29956e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 29966e47a3ccSLukas Czerner APPLY(s_commit_interval); 29976e47a3ccSLukas Czerner APPLY(s_stripe); 29986e47a3ccSLukas Czerner APPLY(s_max_batch_time); 29996e47a3ccSLukas Czerner APPLY(s_min_batch_time); 30006e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 30016e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 30026e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 30036e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 30046e47a3ccSLukas Czerner APPLY(s_resgid); 30056e47a3ccSLukas Czerner APPLY(s_resuid); 30066e47a3ccSLukas Czerner 30076e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 30086e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 30096e47a3ccSLukas Czerner #endif 30106e47a3ccSLukas Czerner 30116e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 30126e47a3ccSLukas Czerner 30136e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) 30146e47a3ccSLukas Czerner ret = ext4_set_test_dummy_encryption(sb, ctx->test_dummy_enc_arg); 30156e47a3ccSLukas Czerner 30166e47a3ccSLukas Czerner return ret; 30176e47a3ccSLukas Czerner } 30186e47a3ccSLukas Czerner 30196e47a3ccSLukas Czerner 3020da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 30214c94bff9SLukas Czerner { 3022ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 30236e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 30244c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 30256e47a3ccSLukas Czerner 30266e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 30276e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 30286e47a3ccSLukas Czerner 302933458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 30306e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 30316e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 3032ac27a0ecSDave Kleikamp 30336e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 30346e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 3035ac27a0ecSDave Kleikamp 30366e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 30376e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 3038da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 3039b31e1552SEric Sandeen "format mixing"); 3040da812f61SLukas Czerner return -EINVAL; 3041ac27a0ecSDave Kleikamp } 3042ac27a0ecSDave Kleikamp } 3043ac27a0ecSDave Kleikamp #endif 30446e47a3ccSLukas Czerner return 1; 3045ac27a0ecSDave Kleikamp } 3046ac27a0ecSDave Kleikamp 30472adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 30482adf6da8STheodore Ts'o struct super_block *sb) 30492adf6da8STheodore Ts'o { 30502adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 30512adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 305233458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 30532adf6da8STheodore Ts'o 30542adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 30552adf6da8STheodore Ts'o char *fmtname = ""; 30562adf6da8STheodore Ts'o 30572adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 30582adf6da8STheodore Ts'o case QFMT_VFS_OLD: 30592adf6da8STheodore Ts'o fmtname = "vfsold"; 30602adf6da8STheodore Ts'o break; 30612adf6da8STheodore Ts'o case QFMT_VFS_V0: 30622adf6da8STheodore Ts'o fmtname = "vfsv0"; 30632adf6da8STheodore Ts'o break; 30642adf6da8STheodore Ts'o case QFMT_VFS_V1: 30652adf6da8STheodore Ts'o fmtname = "vfsv1"; 30662adf6da8STheodore Ts'o break; 30672adf6da8STheodore Ts'o } 30682adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 30692adf6da8STheodore Ts'o } 30702adf6da8STheodore Ts'o 307133458eabSTheodore Ts'o rcu_read_lock(); 307233458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 307333458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 307433458eabSTheodore Ts'o if (usr_qf_name) 307533458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 307633458eabSTheodore Ts'o if (grp_qf_name) 307733458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 307833458eabSTheodore Ts'o rcu_read_unlock(); 30792adf6da8STheodore Ts'o #endif 30802adf6da8STheodore Ts'o } 30812adf6da8STheodore Ts'o 30825a916be1STheodore Ts'o static const char *token2str(int token) 30835a916be1STheodore Ts'o { 308497d8a670SLukas Czerner const struct fs_parameter_spec *spec; 30855a916be1STheodore Ts'o 308697d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 308797d8a670SLukas Czerner if (spec->opt == token && !spec->type) 30885a916be1STheodore Ts'o break; 308997d8a670SLukas Czerner return spec->name; 30905a916be1STheodore Ts'o } 30915a916be1STheodore Ts'o 30922adf6da8STheodore Ts'o /* 30932adf6da8STheodore Ts'o * Show an option if 30942adf6da8STheodore Ts'o * - it's set to a non-default value OR 30952adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 30962adf6da8STheodore Ts'o */ 309766acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 309866acdcf4STheodore Ts'o int nodefs) 30992adf6da8STheodore Ts'o { 31002adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 31012adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 310268afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 31035a916be1STheodore Ts'o const struct mount_opts *m; 310466acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 31052adf6da8STheodore Ts'o 310666acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 310766acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 31082adf6da8STheodore Ts'o 31092adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 31105a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 31115a916be1STheodore Ts'o 31125a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 31135a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 31145a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 31159cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 31165a916be1STheodore Ts'o continue; 311768afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 31185a916be1STheodore Ts'o continue; /* skip if same as the default */ 31195a916be1STheodore Ts'o if ((want_set && 31205a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 31215a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 31225a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 31235a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 31245a916be1STheodore Ts'o } 31255a916be1STheodore Ts'o 312608cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 31275a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 312808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 312908cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 313008cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 31315a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 313208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 313308cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 313466acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 31355a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 31365a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 31372adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 31385a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 31392adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 31405a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 314166acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 31425a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 314366acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 31445a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 314566acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 31465a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 3147357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 31485a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 314966acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 31505a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 315168afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 315268afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 31532adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 31545a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 31552adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 31565a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 31572adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 31585a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 31595a916be1STheodore Ts'o } 316066acdcf4STheodore Ts'o if (nodefs || 316166acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 31625a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 31632adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 31642adf6da8STheodore Ts'o 3165ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 316666acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 31675a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3168df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3169df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 31707915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 31717915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3172ed318a6cSEric Biggers 3173ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 31742adf6da8STheodore Ts'o 31754f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 31764f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 31774f74d15fSEric Biggers 31789cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 31799cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 31809cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 31819cb20f94SIra Weiny else 31829cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 31839cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 31849cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 31859cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 31869cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 31879cb20f94SIra Weiny } 31882adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 31892adf6da8STheodore Ts'o return 0; 31902adf6da8STheodore Ts'o } 31912adf6da8STheodore Ts'o 319266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 319366acdcf4STheodore Ts'o { 319466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 319566acdcf4STheodore Ts'o } 319666acdcf4STheodore Ts'o 3197ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 319866acdcf4STheodore Ts'o { 319966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 320066acdcf4STheodore Ts'o int rc; 320166acdcf4STheodore Ts'o 3202bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 320366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 320466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 320566acdcf4STheodore Ts'o return rc; 320666acdcf4STheodore Ts'o } 320766acdcf4STheodore Ts'o 3208617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3209ac27a0ecSDave Kleikamp int read_only) 3210ac27a0ecSDave Kleikamp { 3211617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3212c89128a0SJaegeuk Kim int err = 0; 3213ac27a0ecSDave Kleikamp 3214617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3215b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3216b31e1552SEric Sandeen "forcing read-only mode"); 3217c89128a0SJaegeuk Kim err = -EROFS; 32185adaccacSyangerkun goto done; 3219ac27a0ecSDave Kleikamp } 3220ac27a0ecSDave Kleikamp if (read_only) 3221281b5995STheodore Ts'o goto done; 3222617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3223b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3224b31e1552SEric Sandeen "running e2fsck is recommended"); 3225c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3226b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3227b31e1552SEric Sandeen "warning: mounting fs with errors, " 3228b31e1552SEric Sandeen "running e2fsck is recommended"); 3229ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3230ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3231ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3232b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3233b31e1552SEric Sandeen "warning: maximal mount count reached, " 3234b31e1552SEric Sandeen "running e2fsck is recommended"); 3235ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 32366a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 32376a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3238b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3239b31e1552SEric Sandeen "warning: checktime reached, " 3240b31e1552SEric Sandeen "running e2fsck is recommended"); 32410390131bSFrank Mayhar if (!sbi->s_journal) 3242216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3243ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3244617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3245e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 32466a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 324702f310fcSJan Kara if (sbi->s_journal) { 3248e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 324902f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 325002f310fcSJan Kara ext4_set_feature_orphan_present(sb); 325102f310fcSJan Kara } 3252ac27a0ecSDave Kleikamp 32534392fbc4SJan Kara err = ext4_commit_super(sb); 3254281b5995STheodore Ts'o done: 3255ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3256a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3257a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3258ac27a0ecSDave Kleikamp sb->s_blocksize, 3259ac27a0ecSDave Kleikamp sbi->s_groups_count, 3260617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3261617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3262a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3263ac27a0ecSDave Kleikamp 32647abc52c2SDan Magenheimer cleancache_init_fs(sb); 3265c89128a0SJaegeuk Kim return err; 3266ac27a0ecSDave Kleikamp } 3267ac27a0ecSDave Kleikamp 3268117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3269117fff10STheodore Ts'o { 3270117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 32717c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 327237b0b6b8SDan Carpenter int size, i, j; 3273117fff10STheodore Ts'o 3274117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3275117fff10STheodore Ts'o return 0; 3276117fff10STheodore Ts'o 3277117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3278117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3279117fff10STheodore Ts'o return 0; 3280117fff10STheodore Ts'o 32817c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 32827c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3283117fff10STheodore Ts'o if (!new_groups) { 32847c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 32857c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3286117fff10STheodore Ts'o return -ENOMEM; 3287117fff10STheodore Ts'o } 32887c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 32897c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 32907c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 32917c990728SSuraj Jitindar Singh GFP_KERNEL); 32927c990728SSuraj Jitindar Singh if (!new_groups[i]) { 329337b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 329437b0b6b8SDan Carpenter kvfree(new_groups[j]); 32957c990728SSuraj Jitindar Singh kvfree(new_groups); 32967c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 32977c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 32987c990728SSuraj Jitindar Singh return -ENOMEM; 3299117fff10STheodore Ts'o } 33007c990728SSuraj Jitindar Singh } 33017c990728SSuraj Jitindar Singh rcu_read_lock(); 33027c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 33037c990728SSuraj Jitindar Singh if (old_groups) 33047c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 33057c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 33067c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 33077c990728SSuraj Jitindar Singh rcu_read_unlock(); 33087c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 33097c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 33107c990728SSuraj Jitindar Singh if (old_groups) 33117c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3312117fff10STheodore Ts'o return 0; 3313117fff10STheodore Ts'o } 3314117fff10STheodore Ts'o 3315772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3316772cb7c8SJose R. Santos { 3317772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3318772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 33197c990728SSuraj Jitindar Singh struct flex_groups *fg; 3320772cb7c8SJose R. Santos ext4_group_t flex_group; 3321117fff10STheodore Ts'o int i, err; 3322772cb7c8SJose R. Santos 3323503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3324d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3325772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3326772cb7c8SJose R. Santos return 1; 3327772cb7c8SJose R. Santos } 3328772cb7c8SJose R. Santos 3329117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3330117fff10STheodore Ts'o if (err) 3331772cb7c8SJose R. Santos goto failed; 3332772cb7c8SJose R. Santos 3333772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 333488b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3335772cb7c8SJose R. Santos 3336772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 33377c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 33387c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 333990ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 33407c990728SSuraj Jitindar Singh &fg->free_clusters); 33417c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3342772cb7c8SJose R. Santos } 3343772cb7c8SJose R. Santos 3344772cb7c8SJose R. Santos return 1; 3345772cb7c8SJose R. Santos failed: 3346772cb7c8SJose R. Santos return 0; 3347772cb7c8SJose R. Santos } 3348772cb7c8SJose R. Santos 3349e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3350717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3351717d50e4SAndreas Dilger { 3352b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3353717d50e4SAndreas Dilger __u16 crc = 0; 3354717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3355e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3356717d50e4SAndreas Dilger 33579aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3358feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3359feb0ab32SDarrick J. Wong __u32 csum32; 3360b47820edSDaeho Jeong __u16 dummy_csum = 0; 3361feb0ab32SDarrick J. Wong 3362feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3363feb0ab32SDarrick J. Wong sizeof(le_group)); 3364b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3365b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3366b47820edSDaeho Jeong sizeof(dummy_csum)); 3367b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3368b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3369b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3370b47820edSDaeho Jeong sbi->s_desc_size - offset); 3371feb0ab32SDarrick J. Wong 3372feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3373feb0ab32SDarrick J. Wong goto out; 3374feb0ab32SDarrick J. Wong } 3375feb0ab32SDarrick J. Wong 3376feb0ab32SDarrick J. Wong /* old crc16 code */ 3377e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3378813d32f9SDarrick J. Wong return 0; 3379813d32f9SDarrick J. Wong 3380717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3381717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3382717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3383717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3384717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3385e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3386717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3387717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3388717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3389717d50e4SAndreas Dilger offset); 3390717d50e4SAndreas Dilger 3391feb0ab32SDarrick J. Wong out: 3392717d50e4SAndreas Dilger return cpu_to_le16(crc); 3393717d50e4SAndreas Dilger } 3394717d50e4SAndreas Dilger 3395feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3396717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3397717d50e4SAndreas Dilger { 3398feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3399e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3400717d50e4SAndreas Dilger return 0; 3401717d50e4SAndreas Dilger 3402717d50e4SAndreas Dilger return 1; 3403717d50e4SAndreas Dilger } 3404717d50e4SAndreas Dilger 3405feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3406feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3407feb0ab32SDarrick J. Wong { 3408feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3409feb0ab32SDarrick J. Wong return; 3410e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3411feb0ab32SDarrick J. Wong } 3412feb0ab32SDarrick J. Wong 3413ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3414bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3415829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3416bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3417ac27a0ecSDave Kleikamp { 3418617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3419617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3420617ba13bSMingming Cao ext4_fsblk_t last_block; 342144de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3422bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3423bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3424bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3425ce421581SJose R. Santos int flexbg_flag = 0; 3426bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3427ac27a0ecSDave Kleikamp 3428e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3429ce421581SJose R. Santos flexbg_flag = 1; 3430ce421581SJose R. Santos 3431617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3432ac27a0ecSDave Kleikamp 3433197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3434197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3435197cd65aSAkinobu Mita 3436ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3437bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3438ac27a0ecSDave Kleikamp else 3439ac27a0ecSDave Kleikamp last_block = first_block + 3440617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3441ac27a0ecSDave Kleikamp 3442bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3443bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3444bfff6873SLukas Czerner grp = i; 3445bfff6873SLukas Czerner 34468fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3447829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3448829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3449829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3450829fa70dSTheodore Ts'o "superblock", i); 345118db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 345218db4b4eSTheodore Ts'o return 0; 3453829fa70dSTheodore Ts'o } 345477260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 345577260807STheodore Ts'o block_bitmap <= last_bg_block) { 345677260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 345777260807STheodore Ts'o "Block bitmap for group %u overlaps " 345877260807STheodore Ts'o "block group descriptors", i); 345977260807STheodore Ts'o if (!sb_rdonly(sb)) 346077260807STheodore Ts'o return 0; 346177260807STheodore Ts'o } 34622b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3463b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3464a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3465b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3466ac27a0ecSDave Kleikamp return 0; 3467ac27a0ecSDave Kleikamp } 34688fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3469829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3470829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3471829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3472829fa70dSTheodore Ts'o "superblock", i); 347318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 347418db4b4eSTheodore Ts'o return 0; 3475829fa70dSTheodore Ts'o } 347677260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 347777260807STheodore Ts'o inode_bitmap <= last_bg_block) { 347877260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 347977260807STheodore Ts'o "Inode bitmap for group %u overlaps " 348077260807STheodore Ts'o "block group descriptors", i); 348177260807STheodore Ts'o if (!sb_rdonly(sb)) 348277260807STheodore Ts'o return 0; 348377260807STheodore Ts'o } 34842b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3485b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3486a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3487b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3488ac27a0ecSDave Kleikamp return 0; 3489ac27a0ecSDave Kleikamp } 34908fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3491829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3492829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3493829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3494829fa70dSTheodore Ts'o "superblock", i); 349518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 349618db4b4eSTheodore Ts'o return 0; 3497829fa70dSTheodore Ts'o } 349877260807STheodore Ts'o if (inode_table >= sb_block + 1 && 349977260807STheodore Ts'o inode_table <= last_bg_block) { 350077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 350177260807STheodore Ts'o "Inode table for group %u overlaps " 350277260807STheodore Ts'o "block group descriptors", i); 350377260807STheodore Ts'o if (!sb_rdonly(sb)) 350477260807STheodore Ts'o return 0; 350577260807STheodore Ts'o } 3506bd81d8eeSLaurent Vivier if (inode_table < first_block || 35072b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3509a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3510b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3511ac27a0ecSDave Kleikamp return 0; 3512ac27a0ecSDave Kleikamp } 3513955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3514feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3515b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3516b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3517e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3518fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3519bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3520955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3521717d50e4SAndreas Dilger return 0; 3522717d50e4SAndreas Dilger } 35237ee1ec4cSLi Zefan } 3524955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3525ce421581SJose R. Santos if (!flexbg_flag) 3526617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3527ac27a0ecSDave Kleikamp } 3528bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3529bfff6873SLukas Czerner *first_not_zeroed = grp; 3530ac27a0ecSDave Kleikamp return 1; 3531ac27a0ecSDave Kleikamp } 3532ac27a0ecSDave Kleikamp 3533cd2291a4SEric Sandeen /* 3534cd2291a4SEric Sandeen * Maximal extent format file size. 3535cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3536cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3537cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3538cd2291a4SEric Sandeen * so that won't be a limiting factor. 3539cd2291a4SEric Sandeen * 3540f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3541f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3542f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3543f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3544f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3545f17722f9SLukas Czerner * 3546cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3547cd2291a4SEric Sandeen */ 3548f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3549cd2291a4SEric Sandeen { 3550cd2291a4SEric Sandeen loff_t res; 3551cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3552cd2291a4SEric Sandeen 355372deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 355472deb455SChristoph Hellwig 355572deb455SChristoph Hellwig if (!has_huge_files) { 3556cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3557cd2291a4SEric Sandeen 3558cd2291a4SEric Sandeen /* total blocks in file system block size */ 3559cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3560cd2291a4SEric Sandeen upper_limit <<= blkbits; 3561cd2291a4SEric Sandeen } 3562cd2291a4SEric Sandeen 3563f17722f9SLukas Czerner /* 3564f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3565f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3566f17722f9SLukas Czerner * size 3567f17722f9SLukas Czerner */ 3568f17722f9SLukas Czerner res = (1LL << 32) - 1; 3569cd2291a4SEric Sandeen res <<= blkbits; 3570cd2291a4SEric Sandeen 3571cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3572cd2291a4SEric Sandeen if (res > upper_limit) 3573cd2291a4SEric Sandeen res = upper_limit; 3574cd2291a4SEric Sandeen 3575cd2291a4SEric Sandeen return res; 3576cd2291a4SEric Sandeen } 3577ac27a0ecSDave Kleikamp 3578ac27a0ecSDave Kleikamp /* 3579cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 35800fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 35810fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3582ac27a0ecSDave Kleikamp */ 3583f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3584ac27a0ecSDave Kleikamp { 358575ca6ad4SRitesh Harjani unsigned long long upper_limit, res = EXT4_NDIR_BLOCKS; 35860fc1b451SAneesh Kumar K.V int meta_blocks; 358775ca6ad4SRitesh Harjani 358875ca6ad4SRitesh Harjani /* 358975ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 35900b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 35910b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 35920b8e58a1SAndreas Dilger * 35930b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 35940b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 35950fc1b451SAneesh Kumar K.V */ 359672deb455SChristoph Hellwig if (!has_huge_files) { 35970fc1b451SAneesh Kumar K.V /* 359872deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 359972deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 360072deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 36010fc1b451SAneesh Kumar K.V */ 36020fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 36030fc1b451SAneesh Kumar K.V 36040fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 36050fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 36060fc1b451SAneesh Kumar K.V 36070fc1b451SAneesh Kumar K.V } else { 36088180a562SAneesh Kumar K.V /* 36098180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 36108180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 36118180a562SAneesh Kumar K.V * represent total number of blocks in 36128180a562SAneesh Kumar K.V * file system block size 36138180a562SAneesh Kumar K.V */ 36140fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 36150fc1b451SAneesh Kumar K.V 36160fc1b451SAneesh Kumar K.V } 36170fc1b451SAneesh Kumar K.V 36180fc1b451SAneesh Kumar K.V /* indirect blocks */ 36190fc1b451SAneesh Kumar K.V meta_blocks = 1; 36200fc1b451SAneesh Kumar K.V /* double indirect blocks */ 36210fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 36220fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 36230fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 36240fc1b451SAneesh Kumar K.V 36250fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 36260fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3627ac27a0ecSDave Kleikamp 3628ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3629ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3630ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3631ac27a0ecSDave Kleikamp res <<= bits; 3632ac27a0ecSDave Kleikamp if (res > upper_limit) 3633ac27a0ecSDave Kleikamp res = upper_limit; 36340fc1b451SAneesh Kumar K.V 36350fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 36360fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 36370fc1b451SAneesh Kumar K.V 363875ca6ad4SRitesh Harjani return (loff_t)res; 3639ac27a0ecSDave Kleikamp } 3640ac27a0ecSDave Kleikamp 3641617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 364270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3643ac27a0ecSDave Kleikamp { 3644617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3645fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3646ac27a0ecSDave Kleikamp int has_super = 0; 3647ac27a0ecSDave Kleikamp 3648ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3649ac27a0ecSDave Kleikamp 3650e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 365170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3652ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3653617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3654ac27a0ecSDave Kleikamp has_super = 1; 36550b8e58a1SAndreas Dilger 3656bd63f6b0SDarrick J. Wong /* 3657bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3658bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3659bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3660bd63f6b0SDarrick J. Wong * compensate. 3661bd63f6b0SDarrick J. Wong */ 3662bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 366349598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3664bd63f6b0SDarrick J. Wong has_super++; 3665bd63f6b0SDarrick J. Wong 3666617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3667ac27a0ecSDave Kleikamp } 3668ac27a0ecSDave Kleikamp 3669c9de560dSAlex Tomas /** 3670c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3671c9de560dSAlex Tomas * @sbi: In memory super block info 3672c9de560dSAlex Tomas * 3673c9de560dSAlex Tomas * If we have specified it via mount option, then 3674c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3675c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3676c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3677c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3678c9de560dSAlex Tomas * 3679c9de560dSAlex Tomas */ 3680c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3681c9de560dSAlex Tomas { 3682c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3683c9de560dSAlex Tomas unsigned long stripe_width = 3684c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 36853eb08658SDan Ehrenberg int ret; 3686c9de560dSAlex Tomas 3687c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 36883eb08658SDan Ehrenberg ret = sbi->s_stripe; 36895469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 36903eb08658SDan Ehrenberg ret = stripe_width; 36915469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 36923eb08658SDan Ehrenberg ret = stride; 36933eb08658SDan Ehrenberg else 36943eb08658SDan Ehrenberg ret = 0; 3695c9de560dSAlex Tomas 36963eb08658SDan Ehrenberg /* 36973eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 36983eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 36993eb08658SDan Ehrenberg */ 37003eb08658SDan Ehrenberg if (ret <= 1) 37013eb08658SDan Ehrenberg ret = 0; 3702c9de560dSAlex Tomas 37033eb08658SDan Ehrenberg return ret; 3704c9de560dSAlex Tomas } 3705ac27a0ecSDave Kleikamp 3706a13fb1a4SEric Sandeen /* 3707a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3708a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3709a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3710a13fb1a4SEric Sandeen * 0 if it cannot be. 3711a13fb1a4SEric Sandeen */ 371225c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3713a13fb1a4SEric Sandeen { 3714e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3715a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3716a13fb1a4SEric Sandeen "Couldn't mount because of " 3717a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3718a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3719a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3720a13fb1a4SEric Sandeen return 0; 3721a13fb1a4SEric Sandeen } 3722a13fb1a4SEric Sandeen 3723c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3724c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3725c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3726c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3727c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3728c83ad55eSGabriel Krisman Bertazi return 0; 3729c83ad55eSGabriel Krisman Bertazi } 3730c83ad55eSGabriel Krisman Bertazi #endif 3731c83ad55eSGabriel Krisman Bertazi 3732a13fb1a4SEric Sandeen if (readonly) 3733a13fb1a4SEric Sandeen return 1; 3734a13fb1a4SEric Sandeen 3735e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 37362cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 37371751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 37382cb5cc8bSDarrick J. Wong return 1; 37392cb5cc8bSDarrick J. Wong } 37402cb5cc8bSDarrick J. Wong 3741a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3742e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3743a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3744a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3745a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3746a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3747a13fb1a4SEric Sandeen return 0; 3748a13fb1a4SEric Sandeen } 3749e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3750bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3751bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3752bab08ab9STheodore Ts'o "extents feature\n"); 3753bab08ab9STheodore Ts'o return 0; 3754bab08ab9STheodore Ts'o } 37557c319d32SAditya Kali 37569db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3757d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3758d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 37597c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3760d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3761689c958cSLi Xi return 0; 3762689c958cSLi Xi } 37637c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3764a13fb1a4SEric Sandeen return 1; 3765a13fb1a4SEric Sandeen } 3766a13fb1a4SEric Sandeen 376766e61a9eSTheodore Ts'o /* 376866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 376966e61a9eSTheodore Ts'o * on the file system 377066e61a9eSTheodore Ts'o */ 3771235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 377266e61a9eSTheodore Ts'o { 3773235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3774235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3775235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 377666e61a9eSTheodore Ts'o 377766e61a9eSTheodore Ts'o if (es->s_error_count) 3778ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3779ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 378066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 378166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 37826a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 37836a0678a7SArnd Bergmann sb->s_id, 37846a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 378566e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 378666e61a9eSTheodore Ts'o es->s_first_error_func, 378766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 378866e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3789651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 379066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 379166e61a9eSTheodore Ts'o if (es->s_first_error_block) 3792651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 379366e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3794651e1c3bSJoe Perches printk(KERN_CONT "\n"); 379566e61a9eSTheodore Ts'o } 379666e61a9eSTheodore Ts'o if (es->s_last_error_time) { 37976a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 37986a0678a7SArnd Bergmann sb->s_id, 37996a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 380066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 380166e61a9eSTheodore Ts'o es->s_last_error_func, 380266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 380366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3804651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 380566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 380666e61a9eSTheodore Ts'o if (es->s_last_error_block) 3807651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 380866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3809651e1c3bSJoe Perches printk(KERN_CONT "\n"); 381066e61a9eSTheodore Ts'o } 381166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 381266e61a9eSTheodore Ts'o } 381366e61a9eSTheodore Ts'o 3814bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3815bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3816bfff6873SLukas Czerner { 3817bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 38183d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 38193d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 38203d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 38213d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3822bfff6873SLukas Czerner int ret = 0; 382339fec688SShaoying Xu u64 start_time; 3824bfff6873SLukas Czerner 38253d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 38263d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 38273d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 38283d392b26STheodore Ts'o if (prefetch_ios) 38293d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 38303d392b26STheodore Ts'o prefetch_ios); 38313d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 38323d392b26STheodore Ts'o prefetch_ios); 38333d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 38343d392b26STheodore Ts'o ret = 1; 38353d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 38363d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 38373d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 38383d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 38393d392b26STheodore Ts'o ret = 0; 38403d392b26STheodore Ts'o } 38413d392b26STheodore Ts'o } 38423d392b26STheodore Ts'o return ret; 38433d392b26STheodore Ts'o } 3844bfff6873SLukas Czerner 38453d392b26STheodore Ts'o for (; group < ngroups; group++) { 3846bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3847bfff6873SLukas Czerner if (!gdp) { 3848bfff6873SLukas Czerner ret = 1; 3849bfff6873SLukas Czerner break; 3850bfff6873SLukas Czerner } 3851bfff6873SLukas Czerner 3852bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3853bfff6873SLukas Czerner break; 3854bfff6873SLukas Czerner } 3855bfff6873SLukas Czerner 38567f511862STheodore Ts'o if (group >= ngroups) 3857bfff6873SLukas Czerner ret = 1; 3858bfff6873SLukas Czerner 3859bfff6873SLukas Czerner if (!ret) { 386039fec688SShaoying Xu start_time = ktime_get_real_ns(); 3861bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3862bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 38633d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3864bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 386539fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 386639fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3867bfff6873SLukas Czerner } 3868bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3869bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3870bfff6873SLukas Czerner } 3871bfff6873SLukas Czerner return ret; 3872bfff6873SLukas Czerner } 3873bfff6873SLukas Czerner 3874bfff6873SLukas Czerner /* 3875bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 38764ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3877bfff6873SLukas Czerner */ 3878bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3879bfff6873SLukas Czerner { 3880bfff6873SLukas Czerner if (!elr) 3881bfff6873SLukas Czerner return; 3882bfff6873SLukas Czerner 3883bfff6873SLukas Czerner list_del(&elr->lr_request); 38843d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3885bfff6873SLukas Czerner kfree(elr); 3886bfff6873SLukas Czerner } 3887bfff6873SLukas Czerner 3888bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3889bfff6873SLukas Czerner { 38901bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 38911bb933fbSLukas Czerner if (!ext4_li_info) { 38921bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3893bfff6873SLukas Czerner return; 38941bb933fbSLukas Czerner } 3895bfff6873SLukas Czerner 3896bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 38971bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3898bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 38991bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3900bfff6873SLukas Czerner } 3901bfff6873SLukas Czerner 39028f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 39038f1f7453SEric Sandeen 3904bfff6873SLukas Czerner /* 3905bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3906bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3907bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3908bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3909bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3910bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3911bfff6873SLukas Czerner * next waking time and put itself into sleep. 3912bfff6873SLukas Czerner */ 3913bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3914bfff6873SLukas Czerner { 3915bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3916bfff6873SLukas Czerner struct list_head *pos, *n; 3917bfff6873SLukas Czerner struct ext4_li_request *elr; 39184ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3919bfff6873SLukas Czerner 3920bfff6873SLukas Czerner BUG_ON(NULL == eli); 3921bfff6873SLukas Czerner 3922bfff6873SLukas Czerner cont_thread: 3923bfff6873SLukas Czerner while (true) { 3924bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3925bfff6873SLukas Czerner 3926bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3927bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3928bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3929bfff6873SLukas Czerner goto exit_thread; 3930bfff6873SLukas Czerner } 3931bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3932e22834f0SDmitry Monakhov int err = 0; 3933e22834f0SDmitry Monakhov int progress = 0; 3934bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3935bfff6873SLukas Czerner lr_request); 3936bfff6873SLukas Czerner 3937e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3938e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3939e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3940e22834f0SDmitry Monakhov continue; 3941e22834f0SDmitry Monakhov } 3942e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3943e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3944e22834f0SDmitry Monakhov progress = 1; 3945e22834f0SDmitry Monakhov /* 3946e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3947e22834f0SDmitry Monakhov * be removed from the list, it is 3948e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3949e22834f0SDmitry Monakhov */ 3950e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3951e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3952e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3953e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3954e22834f0SDmitry Monakhov n = pos->next; 3955e22834f0SDmitry Monakhov } 3956e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3957e22834f0SDmitry Monakhov } 3958b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3959e22834f0SDmitry Monakhov if (err) { 3960bfff6873SLukas Czerner ext4_remove_li_request(elr); 3961bfff6873SLukas Czerner continue; 3962bfff6873SLukas Czerner } 3963e22834f0SDmitry Monakhov if (!progress) { 3964e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3965e22834f0SDmitry Monakhov (prandom_u32() 3966e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3967b2c78cd0STheodore Ts'o } 3968bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3969bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3970bfff6873SLukas Czerner } 3971bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3972bfff6873SLukas Czerner 3973a0acae0eSTejun Heo try_to_freeze(); 3974bfff6873SLukas Czerner 39754ed5c033SLukas Czerner cur = jiffies; 39764ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3977f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3978bfff6873SLukas Czerner cond_resched(); 3979bfff6873SLukas Czerner continue; 3980bfff6873SLukas Czerner } 3981bfff6873SLukas Czerner 39824ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 39834ed5c033SLukas Czerner 39848f1f7453SEric Sandeen if (kthread_should_stop()) { 39858f1f7453SEric Sandeen ext4_clear_request_list(); 39868f1f7453SEric Sandeen goto exit_thread; 39878f1f7453SEric Sandeen } 3988bfff6873SLukas Czerner } 3989bfff6873SLukas Czerner 3990bfff6873SLukas Czerner exit_thread: 3991bfff6873SLukas Czerner /* 3992bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3993bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3994bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3995bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3996bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3997bfff6873SLukas Czerner * new one. 3998bfff6873SLukas Czerner */ 3999bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 4000bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 4001bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 4002bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 4003bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4004bfff6873SLukas Czerner goto cont_thread; 4005bfff6873SLukas Czerner } 4006bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 4007bfff6873SLukas Czerner kfree(ext4_li_info); 4008bfff6873SLukas Czerner ext4_li_info = NULL; 4009bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4010bfff6873SLukas Czerner 4011bfff6873SLukas Czerner return 0; 4012bfff6873SLukas Czerner } 4013bfff6873SLukas Czerner 4014bfff6873SLukas Czerner static void ext4_clear_request_list(void) 4015bfff6873SLukas Czerner { 4016bfff6873SLukas Czerner struct list_head *pos, *n; 4017bfff6873SLukas Czerner struct ext4_li_request *elr; 4018bfff6873SLukas Czerner 4019bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4020bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 4021bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 4022bfff6873SLukas Czerner lr_request); 4023bfff6873SLukas Czerner ext4_remove_li_request(elr); 4024bfff6873SLukas Czerner } 4025bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4026bfff6873SLukas Czerner } 4027bfff6873SLukas Czerner 4028bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 4029bfff6873SLukas Czerner { 40308f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 40318f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 40328f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 40338f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 4034bfff6873SLukas Czerner ext4_clear_request_list(); 4035bfff6873SLukas Czerner kfree(ext4_li_info); 4036bfff6873SLukas Czerner ext4_li_info = NULL; 403792b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 4038bfff6873SLukas Czerner "initialization thread\n", 4039bfff6873SLukas Czerner err); 4040bfff6873SLukas Czerner return err; 4041bfff6873SLukas Czerner } 4042bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 4043bfff6873SLukas Czerner return 0; 4044bfff6873SLukas Czerner } 4045bfff6873SLukas Czerner 4046bfff6873SLukas Czerner /* 4047bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 4048bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 4049bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 4050bfff6873SLukas Czerner * groups and return total number of groups. 4051bfff6873SLukas Czerner */ 4052bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 4053bfff6873SLukas Czerner { 4054bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 4055bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 4056bfff6873SLukas Czerner 40578844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 40588844618dSTheodore Ts'o return ngroups; 40598844618dSTheodore Ts'o 4060bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 4061bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 4062bfff6873SLukas Czerner if (!gdp) 4063bfff6873SLukas Czerner continue; 4064bfff6873SLukas Czerner 406550122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 4066bfff6873SLukas Czerner break; 4067bfff6873SLukas Czerner } 4068bfff6873SLukas Czerner 4069bfff6873SLukas Czerner return group; 4070bfff6873SLukas Czerner } 4071bfff6873SLukas Czerner 4072bfff6873SLukas Czerner static int ext4_li_info_new(void) 4073bfff6873SLukas Czerner { 4074bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 4075bfff6873SLukas Czerner 4076bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 4077bfff6873SLukas Czerner if (!eli) 4078bfff6873SLukas Czerner return -ENOMEM; 4079bfff6873SLukas Czerner 4080bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 4081bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 4082bfff6873SLukas Czerner 4083bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 4084bfff6873SLukas Czerner 4085bfff6873SLukas Czerner ext4_li_info = eli; 4086bfff6873SLukas Czerner 4087bfff6873SLukas Czerner return 0; 4088bfff6873SLukas Czerner } 4089bfff6873SLukas Czerner 4090bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 4091bfff6873SLukas Czerner ext4_group_t start) 4092bfff6873SLukas Czerner { 4093bfff6873SLukas Czerner struct ext4_li_request *elr; 4094bfff6873SLukas Czerner 4095bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 4096bfff6873SLukas Czerner if (!elr) 4097bfff6873SLukas Czerner return NULL; 4098bfff6873SLukas Czerner 4099bfff6873SLukas Czerner elr->lr_super = sb; 41003d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 410121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 41023d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 4103bfff6873SLukas Czerner elr->lr_next_group = start; 410421175ca4SHarshad Shirwadkar } else { 410521175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 41063d392b26STheodore Ts'o } 4107bfff6873SLukas Czerner 4108bfff6873SLukas Czerner /* 4109bfff6873SLukas Czerner * Randomize first schedule time of the request to 4110bfff6873SLukas Czerner * spread the inode table initialization requests 4111bfff6873SLukas Czerner * better. 4112bfff6873SLukas Czerner */ 4113dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 4114dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 4115bfff6873SLukas Czerner return elr; 4116bfff6873SLukas Czerner } 4117bfff6873SLukas Czerner 41187f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 4119bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 4120bfff6873SLukas Czerner { 4121bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 41227f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 412349598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 41246c5a6cb9SAndrew Morton int ret = 0; 4125bfff6873SLukas Czerner 41267f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 412751ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 412851ce6511SLukas Czerner /* 412951ce6511SLukas Czerner * Reset timeout so it can be computed again, because 413051ce6511SLukas Czerner * s_li_wait_mult might have changed. 413151ce6511SLukas Czerner */ 413251ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 41337f511862STheodore Ts'o goto out; 413451ce6511SLukas Czerner } 4135bfff6873SLukas Czerner 413621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 41373d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 41383d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 41397f511862STheodore Ts'o goto out; 4140bfff6873SLukas Czerner 4141bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 41427f511862STheodore Ts'o if (!elr) { 41437f511862STheodore Ts'o ret = -ENOMEM; 41447f511862STheodore Ts'o goto out; 41457f511862STheodore Ts'o } 4146bfff6873SLukas Czerner 4147bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4148bfff6873SLukas Czerner ret = ext4_li_info_new(); 4149bfff6873SLukas Czerner if (ret) 4150bfff6873SLukas Czerner goto out; 4151bfff6873SLukas Czerner } 4152bfff6873SLukas Czerner 4153bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4154bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4155bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4156bfff6873SLukas Czerner 4157bfff6873SLukas Czerner sbi->s_li_request = elr; 415846e4690bSTao Ma /* 415946e4690bSTao Ma * set elr to NULL here since it has been inserted to 416046e4690bSTao Ma * the request_list and the removal and free of it is 416146e4690bSTao Ma * handled by ext4_clear_request_list from now on. 416246e4690bSTao Ma */ 416346e4690bSTao Ma elr = NULL; 4164bfff6873SLukas Czerner 4165bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4166bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4167bfff6873SLukas Czerner if (ret) 4168bfff6873SLukas Czerner goto out; 4169bfff6873SLukas Czerner } 4170bfff6873SLukas Czerner out: 4171bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4172beed5ecbSNicolas Kaiser if (ret) 4173bfff6873SLukas Czerner kfree(elr); 4174bfff6873SLukas Czerner return ret; 4175bfff6873SLukas Czerner } 4176bfff6873SLukas Czerner 4177bfff6873SLukas Czerner /* 4178bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4179bfff6873SLukas Czerner * module unload. 4180bfff6873SLukas Czerner */ 4181bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4182bfff6873SLukas Czerner { 4183bfff6873SLukas Czerner /* 4184bfff6873SLukas Czerner * If thread exited earlier 4185bfff6873SLukas Czerner * there's nothing to be done. 4186bfff6873SLukas Czerner */ 41878f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4188bfff6873SLukas Czerner return; 4189bfff6873SLukas Czerner 41908f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4191bfff6873SLukas Czerner } 4192bfff6873SLukas Czerner 419325ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 419425ed6e8aSDarrick J. Wong { 419525ed6e8aSDarrick J. Wong int ret = 1; 419625ed6e8aSDarrick J. Wong int compat, incompat; 419725ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 419825ed6e8aSDarrick J. Wong 41999aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4200db9ee220SDarrick J. Wong /* journal checksum v3 */ 420125ed6e8aSDarrick J. Wong compat = 0; 4202db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 420325ed6e8aSDarrick J. Wong } else { 420425ed6e8aSDarrick J. Wong /* journal checksum v1 */ 420525ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 420625ed6e8aSDarrick J. Wong incompat = 0; 420725ed6e8aSDarrick J. Wong } 420825ed6e8aSDarrick J. Wong 4209feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4210feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4211feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4212feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 421325ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 421425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 421525ed6e8aSDarrick J. Wong compat, 0, 421625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 421725ed6e8aSDarrick J. Wong incompat); 421825ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 421925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 422025ed6e8aSDarrick J. Wong compat, 0, 422125ed6e8aSDarrick J. Wong incompat); 422225ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 422325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 422425ed6e8aSDarrick J. Wong } else { 4225feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4226feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 422725ed6e8aSDarrick J. Wong } 422825ed6e8aSDarrick J. Wong 422925ed6e8aSDarrick J. Wong return ret; 423025ed6e8aSDarrick J. Wong } 423125ed6e8aSDarrick J. Wong 4232952fc18eSTheodore Ts'o /* 4233952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4234952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4235952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4236952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4237952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4238952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4239952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4240952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4241952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4242952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4243952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4244952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4245952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4246952fc18eSTheodore Ts'o */ 4247952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4248952fc18eSTheodore Ts'o char *buf) 4249952fc18eSTheodore Ts'o { 4250952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4251952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4252952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4253952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4254952fc18eSTheodore Ts'o int s, j, count = 0; 4255952fc18eSTheodore Ts'o 4256e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 42570548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 42580548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 42590548bbb8STheodore Ts'o 4260952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4261952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4262952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4263952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4264952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4265952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4266952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4267952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4268952fc18eSTheodore Ts'o count++; 4269952fc18eSTheodore Ts'o } 4270952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4271952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4272952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4273952fc18eSTheodore Ts'o count++; 4274952fc18eSTheodore Ts'o } 4275952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4276952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4277952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4278952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4279952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4280952fc18eSTheodore Ts'o count++; 4281952fc18eSTheodore Ts'o } 4282952fc18eSTheodore Ts'o if (i != grp) 4283952fc18eSTheodore Ts'o continue; 4284952fc18eSTheodore Ts'o s = 0; 4285952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4286952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4287952fc18eSTheodore Ts'o count++; 4288952fc18eSTheodore Ts'o } 4289c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4290c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4291c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4292c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4293c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4294952fc18eSTheodore Ts'o } 4295c48ae41bSTheodore Ts'o count += j; 4296c48ae41bSTheodore Ts'o for (; j > 0; j--) 4297c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4298952fc18eSTheodore Ts'o } 4299952fc18eSTheodore Ts'o if (!count) 4300952fc18eSTheodore Ts'o return 0; 4301952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4302952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4303952fc18eSTheodore Ts'o } 4304952fc18eSTheodore Ts'o 4305952fc18eSTheodore Ts'o /* 4306952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4307952fc18eSTheodore Ts'o */ 4308952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4309952fc18eSTheodore Ts'o { 4310952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4311952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 43123c816dedSEric Whitney struct inode *j_inode; 43133c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4314952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4315952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 43164fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4317952fc18eSTheodore Ts'o 4318952fc18eSTheodore Ts'o if (!buf) 4319952fc18eSTheodore Ts'o return -ENOMEM; 4320952fc18eSTheodore Ts'o 4321952fc18eSTheodore Ts'o /* 4322952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4323952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4324952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4325952fc18eSTheodore Ts'o */ 4326952fc18eSTheodore Ts'o 4327952fc18eSTheodore Ts'o /* 4328952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4329952fc18eSTheodore Ts'o */ 4330952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4331952fc18eSTheodore Ts'o 4332952fc18eSTheodore Ts'o /* 4333952fc18eSTheodore Ts'o * Add the overhead found in each block group 4334952fc18eSTheodore Ts'o */ 4335952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4336952fc18eSTheodore Ts'o int blks; 4337952fc18eSTheodore Ts'o 4338952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4339952fc18eSTheodore Ts'o overhead += blks; 4340952fc18eSTheodore Ts'o if (blks) 4341952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4342952fc18eSTheodore Ts'o cond_resched(); 4343952fc18eSTheodore Ts'o } 43443c816dedSEric Whitney 43453c816dedSEric Whitney /* 43463c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 43473c816dedSEric Whitney * loaded or not 43483c816dedSEric Whitney */ 4349ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4350ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4351f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4352f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 43533c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 43543c816dedSEric Whitney if (j_inode) { 43553c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 43563c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 43573c816dedSEric Whitney iput(j_inode); 43583c816dedSEric Whitney } else { 43593c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 43603c816dedSEric Whitney } 43613c816dedSEric Whitney } 4362952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4363952fc18eSTheodore Ts'o smp_wmb(); 4364952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4365952fc18eSTheodore Ts'o return 0; 4366952fc18eSTheodore Ts'o } 4367952fc18eSTheodore Ts'o 4368b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 436927dd4385SLukas Czerner { 437027dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4371b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 437227dd4385SLukas Czerner 437327dd4385SLukas Czerner /* 437430fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 437530fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 437630fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 437730fac0f7SJan Kara * to keep ext2/3 backward compatibility. 437830fac0f7SJan Kara */ 4379e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4380b5799018STheodore Ts'o return; 438130fac0f7SJan Kara /* 438227dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 438327dd4385SLukas Czerner * This should cover the situations where we can not afford to run 438427dd4385SLukas Czerner * out of space like for example punch hole, or converting 4385556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 438627dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 438727dd4385SLukas Czerner * very rare. 438827dd4385SLukas Czerner */ 4389b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4390b5799018STheodore Ts'o sbi->s_cluster_bits); 439127dd4385SLukas Czerner 439227dd4385SLukas Czerner do_div(resv_clusters, 50); 439327dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 439427dd4385SLukas Czerner 4395b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 439627dd4385SLukas Czerner } 439727dd4385SLukas Czerner 4398ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4399ca9b404fSRoman Anufriev { 4400ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4401ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4402ca9b404fSRoman Anufriev return "none"; 4403ca9b404fSRoman Anufriev 4404ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4405ca9b404fSRoman Anufriev return "journalled"; 4406ca9b404fSRoman Anufriev else 4407ca9b404fSRoman Anufriev return "writeback"; 4408ca9b404fSRoman Anufriev #else 4409ca9b404fSRoman Anufriev return "disabled"; 4410ca9b404fSRoman Anufriev #endif 4411ca9b404fSRoman Anufriev } 4412ca9b404fSRoman Anufriev 4413188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4414188c299eSJan Kara enum ext4_journal_trigger_type type, 4415188c299eSJan Kara void (*trigger)( 4416188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4417188c299eSJan Kara struct buffer_head *bh, 4418188c299eSJan Kara void *mapped_data, 4419188c299eSJan Kara size_t size)) 4420188c299eSJan Kara { 4421188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4422188c299eSJan Kara 4423188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4424188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4425188c299eSJan Kara } 4426188c299eSJan Kara 44277edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4428ac27a0ecSDave Kleikamp { 44297edfd85bSLukas Czerner if (!sbi) 44307edfd85bSLukas Czerner return; 44317edfd85bSLukas Czerner 44327edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 44337edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 44347edfd85bSLukas Czerner kfree(sbi); 44357edfd85bSLukas Czerner } 44367edfd85bSLukas Czerner 44377edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 44387edfd85bSLukas Czerner { 44397edfd85bSLukas Czerner struct ext4_sb_info *sbi; 44407edfd85bSLukas Czerner 44417edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 44427edfd85bSLukas Czerner if (!sbi) 44437edfd85bSLukas Czerner return NULL; 44447edfd85bSLukas Czerner 44457edfd85bSLukas Czerner sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev); 44467edfd85bSLukas Czerner 44477edfd85bSLukas Czerner sbi->s_blockgroup_lock = 44487edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 44497edfd85bSLukas Czerner 44507edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 44517edfd85bSLukas Czerner goto err_out; 44527edfd85bSLukas Czerner 44537edfd85bSLukas Czerner sb->s_fs_info = sbi; 44547edfd85bSLukas Czerner sbi->s_sb = sb; 44557edfd85bSLukas Czerner return sbi; 44567edfd85bSLukas Czerner err_out: 44577edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 44587edfd85bSLukas Czerner kfree(sbi); 44597edfd85bSLukas Czerner return NULL; 44607edfd85bSLukas Czerner } 44617edfd85bSLukas Czerner 44627edfd85bSLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb, 44637edfd85bSLukas Czerner int silent) 44647edfd85bSLukas Czerner { 44651d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4466617ba13bSMingming Cao struct ext4_super_block *es = NULL; 44677edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 44687c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4469617ba13bSMingming Cao ext4_fsblk_t block; 447070bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4471ac27a0ecSDave Kleikamp unsigned long offset = 0; 4472ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4473ac27a0ecSDave Kleikamp struct inode *root; 4474dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4475281b5995STheodore Ts'o int blocksize, clustersize; 44764ec11028STheodore Ts'o unsigned int db_count; 44774ec11028STheodore Ts'o unsigned int i; 4478ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4479bd81d8eeSLaurent Vivier __u64 blocks_count; 448007aa2ea1SLukas Czerner int err = 0; 4481bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 44827edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 4483b237e304SHarshad Shirwadkar 4484b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 44857edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 44867edfd85bSLukas Czerner ctx->mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4487ac27a0ecSDave Kleikamp 4488240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4489f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 44908446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4491ac27a0ecSDave Kleikamp 449207aa2ea1SLukas Czerner /* -EINVAL is default */ 4493dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4494617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4495ac27a0ecSDave Kleikamp if (!blocksize) { 4496b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4497ac27a0ecSDave Kleikamp goto out_fail; 4498ac27a0ecSDave Kleikamp } 4499ac27a0ecSDave Kleikamp 4500ac27a0ecSDave Kleikamp /* 4501617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4502ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4503ac27a0ecSDave Kleikamp */ 4504617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 45057edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 450670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4507ac27a0ecSDave Kleikamp } else { 45087edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block; 4509ac27a0ecSDave Kleikamp } 4510ac27a0ecSDave Kleikamp 45118394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 45128394a6abSzhangyi (F) if (IS_ERR(bh)) { 4513b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 45148394a6abSzhangyi (F) ret = PTR_ERR(bh); 4515ac27a0ecSDave Kleikamp goto out_fail; 4516ac27a0ecSDave Kleikamp } 4517ac27a0ecSDave Kleikamp /* 4518ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4519617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4520ac27a0ecSDave Kleikamp */ 45212716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4522ac27a0ecSDave Kleikamp sbi->s_es = es; 4523ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4524617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4525617ba13bSMingming Cao goto cantfind_ext4; 4526afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4527ac27a0ecSDave Kleikamp 4528feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4529e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4530e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4531363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4532feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4533feb0ab32SDarrick J. Wong 4534d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4535d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4536d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4537d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4538d25425f8SDarrick J. Wong silent = 1; 4539d25425f8SDarrick J. Wong goto cantfind_ext4; 4540d25425f8SDarrick J. Wong } 454102f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 454202f310fcSJan Kara ext4_orphan_file_block_trigger); 4543d25425f8SDarrick J. Wong 45440441984aSDarrick J. Wong /* Load the checksum driver */ 45450441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 45460441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 45470441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 45480441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 45490441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 45500441984aSDarrick J. Wong goto failed_mount; 45510441984aSDarrick J. Wong } 45520441984aSDarrick J. Wong 4553a9c47317SDarrick J. Wong /* Check superblock checksum */ 4554a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4555a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4556a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4557a9c47317SDarrick J. Wong silent = 1; 45586a797d27SDarrick J. Wong ret = -EFSBADCRC; 4559a9c47317SDarrick J. Wong goto cantfind_ext4; 4560a9c47317SDarrick J. Wong } 4561a9c47317SDarrick J. Wong 4562a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4563e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 45648c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4565dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4566a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4567a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4568a9c47317SDarrick J. Wong 4569ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4570ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4571fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4572617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4573fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 457487f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4575fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4576617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4577fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4578ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4579fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 458003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4581fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 45822e7842b8SHugh Dickins #endif 4583995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4584995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 458598c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 458698c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 458798c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 458898c1a759SDarrick J. Wong 4589617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4590fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4591617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4592fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4593617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4594fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4595ac27a0ecSDave Kleikamp 4596617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4597fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4598bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4599fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4600bb4f397aSAneesh Kumar K.V else 4601fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 460245f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4603fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 46048b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4605fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4606ac27a0ecSDave Kleikamp 460708cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 460808cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 460930773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 461030773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 461130773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4612ac27a0ecSDave Kleikamp 46138b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4614fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4615ac27a0ecSDave Kleikamp 46161e2462f9SMingming Cao /* 4617dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4618dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4619dd919b98SAneesh Kumar K.V */ 4620bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 46218b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4622fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4623dd919b98SAneesh Kumar K.V 462451ce6511SLukas Czerner /* 462551ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 462651ce6511SLukas Czerner * no mount option specified. 462751ce6511SLukas Czerner */ 462851ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 462951ce6511SLukas Czerner 4630c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4631c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4632c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4633c9200760STheodore Ts'o "Invalid log block size: %u", 4634c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4635c9200760STheodore Ts'o goto failed_mount; 4636c9200760STheodore Ts'o } 4637c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4638c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4639c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4640c9200760STheodore Ts'o "Invalid log cluster size: %u", 4641c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4642c9200760STheodore Ts'o goto failed_mount; 4643c9200760STheodore Ts'o } 4644c9200760STheodore Ts'o 4645c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4646626b035bSRitesh Harjani 4647626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4648626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4649626b035bSRitesh Harjani 46509803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 46519803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 46529803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 46539803387cSTheodore Ts'o } else { 46549803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 46559803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 46569803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 46579803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 46589803387cSTheodore Ts'o sbi->s_first_ino); 46599803387cSTheodore Ts'o goto failed_mount; 46609803387cSTheodore Ts'o } 46619803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 46629803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 46639803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 46649803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46659803387cSTheodore Ts'o "unsupported inode size: %d", 46669803387cSTheodore Ts'o sbi->s_inode_size); 46674f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 46689803387cSTheodore Ts'o goto failed_mount; 46699803387cSTheodore Ts'o } 46709803387cSTheodore Ts'o /* 46719803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 46729803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 46739803387cSTheodore Ts'o * field should suffice to ensure we have extra space 46749803387cSTheodore Ts'o * for all three. 46759803387cSTheodore Ts'o */ 46769803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 46779803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 46789803387cSTheodore Ts'o sb->s_time_gran = 1; 46799803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 46809803387cSTheodore Ts'o } else { 46819803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 46829803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 46839803387cSTheodore Ts'o } 46849803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 46859803387cSTheodore Ts'o } 46869803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 46879803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 46889803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 46899803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 46909803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 46919803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 46929803387cSTheodore Ts'o 46939803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 46949803387cSTheodore Ts'o if (v > max) { 46959803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46969803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 46979803387cSTheodore Ts'o goto failed_mount; 46989803387cSTheodore Ts'o } 46999803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 47009803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 47019803387cSTheodore Ts'o 47029803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 47039803387cSTheodore Ts'o if (v > max) { 47049803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 47059803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 47069803387cSTheodore Ts'o goto failed_mount; 47079803387cSTheodore Ts'o } 47089803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 47099803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 47109803387cSTheodore Ts'o } 47119803387cSTheodore Ts'o } 47129803387cSTheodore Ts'o 47137edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 47147edfd85bSLukas Czerner if (err < 0) 47155aee0f8aSTheodore Ts'o goto failed_mount; 47167edfd85bSLukas Czerner 47175a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 47187edfd85bSLukas Czerner 47197edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 47207edfd85bSLukas Czerner if (err < 0) 47217edfd85bSLukas Czerner goto failed_mount; 47227edfd85bSLukas Czerner 47237edfd85bSLukas Czerner err = ext4_apply_options(fc, sb); 47247edfd85bSLukas Czerner if (err < 0) 4725ac27a0ecSDave Kleikamp goto failed_mount; 4726ac27a0ecSDave Kleikamp 4727c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4728f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4729c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4730c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4731c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4732c83ad55eSGabriel Krisman Bertazi 4733c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4734c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4735c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4736c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4737c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4738c83ad55eSGabriel Krisman Bertazi } 4739c83ad55eSGabriel Krisman Bertazi 4740c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4741c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4742c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4743c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4744c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4745c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4746c83ad55eSGabriel Krisman Bertazi encoding_flags); 4747c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4748c83ad55eSGabriel Krisman Bertazi } 4749c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4750c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4751c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4752c83ad55eSGabriel Krisman Bertazi 4753f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4754f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4755c83ad55eSGabriel Krisman Bertazi } 4756c83ad55eSGabriel Krisman Bertazi #endif 4757c83ad55eSGabriel Krisman Bertazi 475856889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4759556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4760781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4761244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4762556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 476356889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 476456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 476556889787STheodore Ts'o "both data=journal and delalloc"); 476656889787STheodore Ts'o goto failed_mount; 476756889787STheodore Ts'o } 4768fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4769923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4770923ae0ffSRoss Zwisler "both data=journal and dax"); 4771923ae0ffSRoss Zwisler goto failed_mount; 4772923ae0ffSRoss Zwisler } 477373b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 477473b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 477573b92a2aSSergey Karamov "encrypted files will use data=ordered " 477673b92a2aSSergey Karamov "instead of data journaling mode"); 477773b92a2aSSergey Karamov } 477856889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 477956889787STheodore Ts'o clear_opt(sb, DELALLOC); 4780001e4a87STejun Heo } else { 4781001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 478256889787STheodore Ts'o } 478356889787STheodore Ts'o 47841751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 47851751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4786ac27a0ecSDave Kleikamp 4787617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4788e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4789e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4790e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4791b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4792b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4793b31e1552SEric Sandeen "running e2fsck is recommended"); 4794469108ffSTheodore Tso 4795ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4796ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4797e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4798ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4799ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4800ed3654ebSTheodore Ts'o goto failed_mount; 4801ed3654ebSTheodore Ts'o } 4802dec214d0STahsin Erdogan 4803dec214d0STahsin Erdogan /* 4804dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4805dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4806dec214d0STahsin Erdogan */ 4807dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4808dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4809dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4810dec214d0STahsin Erdogan goto failed_mount; 4811dec214d0STahsin Erdogan } 4812ed3654ebSTheodore Ts'o } 4813ed3654ebSTheodore Ts'o 48142035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 48152035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 48162035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 48172035e776STheodore Ts'o "using the ext4 subsystem"); 48182035e776STheodore Ts'o else { 48190d9366d6SEric Sandeen /* 48200d9366d6SEric Sandeen * If we're probing be silent, if this looks like 48210d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 48220d9366d6SEric Sandeen */ 48230d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 48240d9366d6SEric Sandeen goto failed_mount; 48252035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 48262035e776STheodore Ts'o "to feature incompatibilities"); 48272035e776STheodore Ts'o goto failed_mount; 48282035e776STheodore Ts'o } 48292035e776STheodore Ts'o } 48302035e776STheodore Ts'o 48312035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 48322035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 48332035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 48342035e776STheodore Ts'o "using the ext4 subsystem"); 48352035e776STheodore Ts'o else { 48360d9366d6SEric Sandeen /* 48370d9366d6SEric Sandeen * If we're probing be silent, if this looks like 48380d9366d6SEric Sandeen * it's actually an ext4 filesystem. 48390d9366d6SEric Sandeen */ 48400d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 48410d9366d6SEric Sandeen goto failed_mount; 48422035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 48432035e776STheodore Ts'o "to feature incompatibilities"); 48442035e776STheodore Ts'o goto failed_mount; 48452035e776STheodore Ts'o } 48462035e776STheodore Ts'o } 48472035e776STheodore Ts'o 4848469108ffSTheodore Tso /* 4849ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4850ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4851ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4852ac27a0ecSDave Kleikamp */ 4853bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4854ac27a0ecSDave Kleikamp goto failed_mount; 4855a13fb1a4SEric Sandeen 48565b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 48575b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 48585b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 48595b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 48605b9554dcSTheodore Ts'o goto failed_mount; 48615b9554dcSTheodore Ts'o } 48625b9554dcSTheodore Ts'o 48637edfd85bSLukas Czerner if (dax_supported(sbi->s_daxdev, sb->s_bdev, blocksize, 0, 4864bdd3c50dSChristoph Hellwig bdev_nr_sectors(sb->s_bdev))) 4865a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4866a8ab6d38SIra Weiny 4867fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4868559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4869559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4870559db4c6SRoss Zwisler " that may contain inline data"); 4871361d24d4SEric Sandeen goto failed_mount; 4872559db4c6SRoss Zwisler } 4873a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 487424f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4875361d24d4SEric Sandeen "DAX unsupported by block device."); 4876361d24d4SEric Sandeen goto failed_mount; 487724f3478dSDan Williams } 4878923ae0ffSRoss Zwisler } 4879923ae0ffSRoss Zwisler 4880e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 48816ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 48826ddb2447STheodore Ts'o es->s_encryption_level); 48836ddb2447STheodore Ts'o goto failed_mount; 48846ddb2447STheodore Ts'o } 48856ddb2447STheodore Ts'o 4886ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4887afd09b61SAlexey Makhalov /* 4888afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4889afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4890afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4891afd09b61SAlexey Makhalov */ 4892afd09b61SAlexey Makhalov brelse(bh); 4893ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4894ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4895b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4896ce40733cSAneesh Kumar K.V blocksize); 4897afd09b61SAlexey Makhalov bh = NULL; 4898ac27a0ecSDave Kleikamp goto failed_mount; 4899ac27a0ecSDave Kleikamp } 4900ac27a0ecSDave Kleikamp 49017edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 490270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 49038394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 49048394a6abSzhangyi (F) if (IS_ERR(bh)) { 4905b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4906b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 49078394a6abSzhangyi (F) ret = PTR_ERR(bh); 49088394a6abSzhangyi (F) bh = NULL; 4909ac27a0ecSDave Kleikamp goto failed_mount; 4910ac27a0ecSDave Kleikamp } 49112716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4912ac27a0ecSDave Kleikamp sbi->s_es = es; 4913617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4914b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4915b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4916ac27a0ecSDave Kleikamp goto failed_mount; 4917ac27a0ecSDave Kleikamp } 4918ac27a0ecSDave Kleikamp } 4919ac27a0ecSDave Kleikamp 4920e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4921f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4922f287a1a5STheodore Ts'o has_huge_files); 4923f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4924ac27a0ecSDave Kleikamp 49250d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4926e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 49278fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 49280d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4929d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4930b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4931b31e1552SEric Sandeen "unsupported descriptor size %lu", 49320d1ee42fSAlexandre Ratchov sbi->s_desc_size); 49330d1ee42fSAlexandre Ratchov goto failed_mount; 49340d1ee42fSAlexandre Ratchov } 49350d1ee42fSAlexandre Ratchov } else 49360d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 49370b8e58a1SAndreas Dilger 4938ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4939ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 49400b8e58a1SAndreas Dilger 4941617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4942ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4943617ba13bSMingming Cao goto cantfind_ext4; 4944cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4945cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4946cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4947b9c538daSJosh Triplett sbi->s_inodes_per_group); 4948cd6bb35bSTheodore Ts'o goto failed_mount; 4949cd6bb35bSTheodore Ts'o } 4950ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4951ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 49520d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4953ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4954ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4955e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4956e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 49570b8e58a1SAndreas Dilger 4958ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4959ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4960ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4961e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4962f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4963f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4964f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4965f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4966f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4967bc98a42cSDavid Howells if (!sb_rdonly(sb)) 496823301410STheodore Ts'o es->s_flags |= 496923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4970f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4971f99b2589STheodore Ts'o #else 4972bc98a42cSDavid Howells if (!sb_rdonly(sb)) 497323301410STheodore Ts'o es->s_flags |= 497423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4975f99b2589STheodore Ts'o #endif 4976f99b2589STheodore Ts'o } 497723301410STheodore Ts'o } 4978ac27a0ecSDave Kleikamp 4979281b5995STheodore Ts'o /* Handle clustersize */ 4980281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4981ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4982281b5995STheodore Ts'o if (clustersize < blocksize) { 4983281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4984281b5995STheodore Ts'o "cluster size (%d) smaller than " 4985281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4986281b5995STheodore Ts'o goto failed_mount; 4987281b5995STheodore Ts'o } 4988281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4989281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4990281b5995STheodore Ts'o sbi->s_clusters_per_group = 4991281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4992281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4993281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4994281b5995STheodore Ts'o "#clusters per group too big: %lu", 4995281b5995STheodore Ts'o sbi->s_clusters_per_group); 4996281b5995STheodore Ts'o goto failed_mount; 4997281b5995STheodore Ts'o } 4998281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4999281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 5000281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 5001281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 5002281b5995STheodore Ts'o sbi->s_blocks_per_group, 5003281b5995STheodore Ts'o sbi->s_clusters_per_group); 5004281b5995STheodore Ts'o goto failed_mount; 5005281b5995STheodore Ts'o } 5006281b5995STheodore Ts'o } else { 5007281b5995STheodore Ts'o if (clustersize != blocksize) { 5008bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 5009bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 5010bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 5011bfe0a5f4STheodore Ts'o goto failed_mount; 5012281b5995STheodore Ts'o } 5013ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 5014b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5015b31e1552SEric Sandeen "#blocks per group too big: %lu", 5016ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 5017ac27a0ecSDave Kleikamp goto failed_mount; 5018ac27a0ecSDave Kleikamp } 5019281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 5020281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 5021281b5995STheodore Ts'o } 5022281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 5023281b5995STheodore Ts'o 5024960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 5025960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 5026960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 5027960fd856STheodore Ts'o 5028bf43d84bSEric Sandeen /* 5029bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 5030bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 5031bf43d84bSEric Sandeen */ 50325a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 503330ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 50345a9ae68aSDarrick J. Wong if (err) { 5035b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 5036bf43d84bSEric Sandeen " too large to mount safely on this system"); 5037ac27a0ecSDave Kleikamp goto failed_mount; 5038ac27a0ecSDave Kleikamp } 5039ac27a0ecSDave Kleikamp 5040617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 5041617ba13bSMingming Cao goto cantfind_ext4; 5042e7c95593SEric Sandeen 50430f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 50445513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 50450f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 5046b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 5047b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 50480f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 50490f2ddca6SFrom: Thiemo Nagel goto failed_mount; 50500f2ddca6SFrom: Thiemo Nagel } 50510f2ddca6SFrom: Thiemo Nagel 50524ec11028STheodore Ts'o /* 50534ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 50544ec11028STheodore Ts'o * of the filesystem. 50554ec11028STheodore Ts'o */ 50564ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 5057b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 5058b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 5059e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 50604ec11028STheodore Ts'o ext4_blocks_count(es)); 5061e7c95593SEric Sandeen goto failed_mount; 5062e7c95593SEric Sandeen } 5063bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 5064bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 5065bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 5066bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 5067bfe0a5f4STheodore Ts'o goto failed_mount; 5068bfe0a5f4STheodore Ts'o } 5069bfe0a5f4STheodore Ts'o 5070bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 5071bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 5072bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 5073bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 50744ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 5075df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 50764ec11028STheodore Ts'o "(block count %llu, first data block %u, " 5077df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 50784ec11028STheodore Ts'o ext4_blocks_count(es), 50794ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 50804ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 50814ec11028STheodore Ts'o goto failed_mount; 50824ec11028STheodore Ts'o } 5083bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 5084fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 5085fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 50869e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 50879e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 50889e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 50899e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 50909e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 50919e463084STheodore Ts'o ret = -EINVAL; 50929e463084STheodore Ts'o goto failed_mount; 50939e463084STheodore Ts'o } 5094617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 5095617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 50963a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 50972ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 50983a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 50993a4b77cdSEryu Guan "first meta block group too large: %u " 51003a4b77cdSEryu Guan "(group descriptor block count %u)", 51013a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 51023a4b77cdSEryu Guan goto failed_mount; 51033a4b77cdSEryu Guan } 51043a4b77cdSEryu Guan } 51051d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 51061d0c3924STheodore Ts'o kvmalloc_array(db_count, 5107f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 51081d0c3924STheodore Ts'o GFP_KERNEL)); 5109ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 5110b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 51112cde417dSTheodore Ts'o ret = -ENOMEM; 5112ac27a0ecSDave Kleikamp goto failed_mount; 5113ac27a0ecSDave Kleikamp } 5114ac27a0ecSDave Kleikamp 5115705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 5116ac27a0ecSDave Kleikamp 511785c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 511885c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 511985c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 51205df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 512185c8f176SAndrew Perepechko } 512285c8f176SAndrew Perepechko 5123ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 51241d0c3924STheodore Ts'o struct buffer_head *bh; 51251d0c3924STheodore Ts'o 512670bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 51278394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 51288394a6abSzhangyi (F) if (IS_ERR(bh)) { 5129b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5130b31e1552SEric Sandeen "can't read group descriptor %d", i); 5131ac27a0ecSDave Kleikamp db_count = i; 51328394a6abSzhangyi (F) ret = PTR_ERR(bh); 5133ac27a0ecSDave Kleikamp goto failed_mount2; 5134ac27a0ecSDave Kleikamp } 51351d0c3924STheodore Ts'o rcu_read_lock(); 51361d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 51371d0c3924STheodore Ts'o rcu_read_unlock(); 5138ac27a0ecSDave Kleikamp } 513944de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 5140829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 5141b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 51426a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 5143f9ae9cf5STheodore Ts'o goto failed_mount2; 5144ac27a0ecSDave Kleikamp } 5145772cb7c8SJose R. Santos 5146235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5147c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5148c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 514904496411STao Ma 5150a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5151eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5152ce7e010aSTheodore Ts'o goto failed_mount3; 5153ce7e010aSTheodore Ts'o 5154c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 515567a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5156c9de560dSAlex Tomas 5157f9ae9cf5STheodore Ts'o /* 5158f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5159f9ae9cf5STheodore Ts'o */ 5160f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5161617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5162617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5163643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5164a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5165ffcc4182SEric Biggers #endif 5166c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5167c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5168c93d8f88SEric Biggers #endif 5169ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5170617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5171e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 51721fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5173262b4662SJan Kara else 5174262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5175689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5176ac27a0ecSDave Kleikamp #endif 517785787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5178f2fa2ffcSAneesh Kumar K.V 5179ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 51803b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5181ac27a0ecSDave Kleikamp 5182aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 5183aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 5184aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_ineligible_updates, 0); 5185aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 5186aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 5187aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 5188aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 5189aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 51909b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 51919b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 5192aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 5193aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 51948016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 51958016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 51968016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 51978016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 51988016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 51998016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 52008016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 5201aa75f4d3SHarshad Shirwadkar 5202ac27a0ecSDave Kleikamp sb->s_root = NULL; 5203ac27a0ecSDave Kleikamp 5204ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 520502f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5206e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5207ac27a0ecSDave Kleikamp 5208bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5209c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 521050460fe8SDarrick J. Wong goto failed_mount3a; 5211c5e06d10SJohann Lombardi 5212ac27a0ecSDave Kleikamp /* 5213ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5214ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5215ac27a0ecSDave Kleikamp */ 5216e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 52177edfd85bSLukas Czerner err = ext4_load_journal(sb, es, ctx->journal_devnum); 52184753d8a2STheodore Ts'o if (err) 521950460fe8SDarrick J. Wong goto failed_mount3a; 5220bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5221e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5222b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5223b31e1552SEric Sandeen "suppressed and not mounted read-only"); 5224744692dcSJiaying Zhang goto failed_mount_wq; 5225ac27a0ecSDave Kleikamp } else { 52261e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 52271e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 52281e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 52291e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 52301e381f60SDmitry Monakhov goto failed_mount_wq; 52311e381f60SDmitry Monakhov } 52321e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 52331e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 52341e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 52351e381f60SDmitry Monakhov goto failed_mount_wq; 52361e381f60SDmitry Monakhov } 52371e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 52381e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 52391e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 52401e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 52411e381f60SDmitry Monakhov goto failed_mount_wq; 52421e381f60SDmitry Monakhov } 52431e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 52441e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 52451e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 52461e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 52471e381f60SDmitry Monakhov goto failed_mount_wq; 52481e381f60SDmitry Monakhov } 524950b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 52501e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5251fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5252995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 52530390131bSFrank Mayhar sbi->s_journal = NULL; 52540390131bSFrank Mayhar needs_recovery = 0; 52550390131bSFrank Mayhar goto no_journal; 5256ac27a0ecSDave Kleikamp } 5257ac27a0ecSDave Kleikamp 5258e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5259eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5260eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5261b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5262744692dcSJiaying Zhang goto failed_mount_wq; 5263eb40a09cSJose R. Santos } 5264eb40a09cSJose R. Santos 526525ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 526625ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 526725ed6e8aSDarrick J. Wong "feature set"); 526825ed6e8aSDarrick J. Wong goto failed_mount_wq; 5269d4da6c9cSLinus Torvalds } 5270818d276cSGirish Shilamkar 5271a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5272a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5273a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5274a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5275a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5276a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5277a1e5e465SHarshad Shirwadkar } 5278a1e5e465SHarshad Shirwadkar 5279ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5280ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5281ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5282ac27a0ecSDave Kleikamp case 0: 5283ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 528463f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 528563f57933SAndrew Morton * cope, else JOURNAL_DATA 528663f57933SAndrew Morton */ 5287dab291afSMingming Cao if (jbd2_journal_check_available_features 528827f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5289fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 529027f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 529127f394a7STyson Nottingham } else { 5292fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 529327f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 529427f394a7STyson Nottingham } 5295ac27a0ecSDave Kleikamp break; 5296ac27a0ecSDave Kleikamp 5297617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5298617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5299dab291afSMingming Cao if (!jbd2_journal_check_available_features 5300dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5301b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5302b31e1552SEric Sandeen "requested data journaling mode"); 5303744692dcSJiaying Zhang goto failed_mount_wq; 5304ac27a0ecSDave Kleikamp } 53055a150bdeSGustavo A. R. Silva break; 5306ac27a0ecSDave Kleikamp default: 5307ac27a0ecSDave Kleikamp break; 5308ac27a0ecSDave Kleikamp } 5309ab04df78SJan Kara 5310ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5311ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5312ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5313ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5314ab04df78SJan Kara goto failed_mount_wq; 5315ab04df78SJan Kara } 5316ab04df78SJan Kara 53177edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 5318ac27a0ecSDave Kleikamp 5319342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5320afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5321342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5322afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 532318aadd47SBobi Jam 5324ce7e010aSTheodore Ts'o no_journal: 5325cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 532647387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 532747387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5328cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5329cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 53309c191f70ST Makphaibulchoke goto failed_mount_wq; 53319c191f70ST Makphaibulchoke } 53329c191f70ST Makphaibulchoke 5333dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5334dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5335dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5336dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5337dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5338dec214d0STahsin Erdogan goto failed_mount_wq; 5339dec214d0STahsin Erdogan } 5340dec214d0STahsin Erdogan } 5341cdb7ee4cSTahsin Erdogan } 5342dec214d0STahsin Erdogan 5343c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5344c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5345c93d8f88SEric Biggers goto failed_mount_wq; 5346c93d8f88SEric Biggers } 5347c93d8f88SEric Biggers 5348bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 5349e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 5350e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 53514392fbc4SJan Kara ext4_commit_super(sb); 53526ddb2447STheodore Ts'o } 53536ddb2447STheodore Ts'o 5354fd89d5f2STejun Heo /* 5355952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5356952fc18eSTheodore Ts'o * superblock if present. 5357952fc18eSTheodore Ts'o */ 5358952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 5359952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 5360952fc18eSTheodore Ts'o else { 536107aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 536207aa2ea1SLukas Czerner if (err) 5363952fc18eSTheodore Ts'o goto failed_mount_wq; 5364952fc18eSTheodore Ts'o } 5365952fc18eSTheodore Ts'o 5366952fc18eSTheodore Ts'o /* 5367fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5368fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5369fd89d5f2STejun Heo */ 53702e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 53712e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 53722e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 53732e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 537407aa2ea1SLukas Czerner ret = -ENOMEM; 53752e8fa54eSJan Kara goto failed_mount4; 53762e8fa54eSJan Kara } 53772e8fa54eSJan Kara 5378ac27a0ecSDave Kleikamp /* 5379dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5380ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5381ac27a0ecSDave Kleikamp */ 5382ac27a0ecSDave Kleikamp 53838a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 53841d1fe1eeSDavid Howells if (IS_ERR(root)) { 5385b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 53861d1fe1eeSDavid Howells ret = PTR_ERR(root); 538732a9bb57SManish Katiyar root = NULL; 5388ac27a0ecSDave Kleikamp goto failed_mount4; 5389ac27a0ecSDave Kleikamp } 5390ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5391b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 539294bf608aSAl Viro iput(root); 5393ac27a0ecSDave Kleikamp goto failed_mount4; 5394ac27a0ecSDave Kleikamp } 5395b886ee3eSGabriel Krisman Bertazi 539648fde701SAl Viro sb->s_root = d_make_root(root); 53971d1fe1eeSDavid Howells if (!sb->s_root) { 5398b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 53991d1fe1eeSDavid Howells ret = -ENOMEM; 54001d1fe1eeSDavid Howells goto failed_mount4; 54011d1fe1eeSDavid Howells } 5402ac27a0ecSDave Kleikamp 5403c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5404c89128a0SJaegeuk Kim if (ret == -EROFS) { 54051751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5406c89128a0SJaegeuk Kim ret = 0; 5407c89128a0SJaegeuk Kim } else if (ret) 5408c89128a0SJaegeuk Kim goto failed_mount4a; 5409ef7f3835SKalpak Shah 5410b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 541127dd4385SLukas Czerner 54120f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 54136fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 54146fd058f7STheodore Ts'o if (err) { 5415b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5416fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5417f9ae9cf5STheodore Ts'o goto failed_mount4a; 5418f9ae9cf5STheodore Ts'o } 54190f5bde1dSJan Kara } 54208016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5421f9ae9cf5STheodore Ts'o 5422f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5423196e402aSHarshad Shirwadkar 5424196e402aSHarshad Shirwadkar /* 5425196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5426196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5427196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5428196e402aSHarshad Shirwadkar */ 54297edfd85bSLukas Czerner if (ctx->mb_optimize_scan == 1) 5430196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 54317edfd85bSLukas Czerner else if (ctx->mb_optimize_scan == 0) 5432196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5433196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5434196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5435196e402aSHarshad Shirwadkar 5436f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5437f9ae9cf5STheodore Ts'o if (err) { 5438f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5439f9ae9cf5STheodore Ts'o err); 5440dcf2d804STao Ma goto failed_mount5; 5441c2774d84SAneesh Kumar K.V } 5442c2774d84SAneesh Kumar K.V 5443027f14f5STheodore Ts'o /* 5444027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5445027f14f5STheodore Ts'o * mballoc is initialized 5446027f14f5STheodore Ts'o */ 5447027f14f5STheodore Ts'o if (sbi->s_journal) 5448027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5449027f14f5STheodore Ts'o ext4_journal_commit_callback; 5450027f14f5STheodore Ts'o 5451d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5452d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5453d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5454908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5455908c7f19STejun Heo GFP_KERNEL); 5456d5e03cbbSTheodore Ts'o if (!err) { 5457d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5458d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5459908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5460908c7f19STejun Heo GFP_KERNEL); 5461d5e03cbbSTheodore Ts'o } 5462b2bbb92fSJan Kara /* 5463b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5464b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5465b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5466b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5467b2bbb92fSJan Kara * after it is mounted can fail. 5468b2bbb92fSJan Kara */ 5469b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5470d5e03cbbSTheodore Ts'o if (!err) 5471d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5472908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5473d5e03cbbSTheodore Ts'o if (!err) 5474908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5475908c7f19STejun Heo GFP_KERNEL); 5476c8585c6fSDaeho Jeong if (!err) 5477efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5478efc61345SEric Whitney GFP_KERNEL); 5479efc61345SEric Whitney if (!err) 5480bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5481c8585c6fSDaeho Jeong 5482d5e03cbbSTheodore Ts'o if (err) { 5483d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5484d5e03cbbSTheodore Ts'o goto failed_mount6; 5485d5e03cbbSTheodore Ts'o } 5486d5e03cbbSTheodore Ts'o 5487e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5488d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5489d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5490d5e03cbbSTheodore Ts'o "unable to initialize " 5491d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 54928f6840c4SYang Yingliang ret = -ENOMEM; 5493d5e03cbbSTheodore Ts'o goto failed_mount6; 5494d5e03cbbSTheodore Ts'o } 5495d5e03cbbSTheodore Ts'o 5496bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5497bfff6873SLukas Czerner if (err) 5498dcf2d804STao Ma goto failed_mount6; 5499bfff6873SLukas Czerner 5500b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5501dcf2d804STao Ma if (err) 5502dcf2d804STao Ma goto failed_mount7; 55033197ebdbSTheodore Ts'o 550402f310fcSJan Kara err = ext4_init_orphan_info(sb); 550502f310fcSJan Kara if (err) 550602f310fcSJan Kara goto failed_mount8; 55079b2ff357SJan Kara #ifdef CONFIG_QUOTA 55089b2ff357SJan Kara /* Enable quota usage during mount. */ 5509bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 55109b2ff357SJan Kara err = ext4_enable_quotas(sb); 55119b2ff357SJan Kara if (err) 551202f310fcSJan Kara goto failed_mount9; 55139b2ff357SJan Kara } 55149b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 55159b2ff357SJan Kara 5516bc71726cSzhangyi (F) /* 5517bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5518bc71726cSzhangyi (F) * used to detect the metadata async write error. 5519bc71726cSzhangyi (F) */ 5520bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5521bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5522bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5523bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5524617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5525617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5526617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 55270390131bSFrank Mayhar if (needs_recovery) { 5528b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 552911215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 553011215630SJan Kara if (err) 553102f310fcSJan Kara goto failed_mount9; 55320390131bSFrank Mayhar } 55330390131bSFrank Mayhar 553479add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 553579add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 553679add3a3SLukas Czerner if (!blk_queue_discard(q)) 553779add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 553879add3a3SLukas Czerner "mounting with \"discard\" option, but " 553979add3a3SLukas Czerner "the device does not support discard"); 554079add3a3SLukas Czerner } 554179add3a3SLukas Czerner 554266e61a9eSTheodore Ts'o if (es->s_error_count) 554366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5544ac27a0ecSDave Kleikamp 5545efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5546efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5547efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5548efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 55491cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 55501cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5551efbed4dcSTheodore Ts'o 5552ac27a0ecSDave Kleikamp return 0; 5553ac27a0ecSDave Kleikamp 5554617ba13bSMingming Cao cantfind_ext4: 5555ac27a0ecSDave Kleikamp if (!silent) 5556b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5557ac27a0ecSDave Kleikamp goto failed_mount; 5558ac27a0ecSDave Kleikamp 555902f310fcSJan Kara failed_mount9: 556002f310fcSJan Kara ext4_release_orphan_info(sb); 556172ba7450STheodore Ts'o failed_mount8: 5562ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5563cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5564dcf2d804STao Ma failed_mount7: 5565dcf2d804STao Ma ext4_unregister_li_request(sb); 5566dcf2d804STao Ma failed_mount6: 5567f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 55687c990728SSuraj Jitindar Singh rcu_read_lock(); 55697c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 55707c990728SSuraj Jitindar Singh if (flex_groups) { 55717c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 55727c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 55737c990728SSuraj Jitindar Singh kvfree(flex_groups); 55747c990728SSuraj Jitindar Singh } 55757c990728SSuraj Jitindar Singh rcu_read_unlock(); 5576d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5577d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5578d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5579d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5580efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5581bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 558200764937SAzat Khuzhin failed_mount5: 5583f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5584f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5585f9ae9cf5STheodore Ts'o failed_mount4a: 558694bf608aSAl Viro dput(sb->s_root); 558732a9bb57SManish Katiyar sb->s_root = NULL; 558894bf608aSAl Viro failed_mount4: 5589b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 55902e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 55912e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 55924c0425ffSMingming Cao failed_mount_wq: 5593dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5594dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 559550c15df6SChengguang Xu 559647387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 559747387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 559850c15df6SChengguang Xu 55990390131bSFrank Mayhar if (sbi->s_journal) { 5600bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5601bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5602dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 560347b4a50bSJan Kara sbi->s_journal = NULL; 56040390131bSFrank Mayhar } 560550460fe8SDarrick J. Wong failed_mount3a: 5606d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5607eb68d0e2SZheng Liu failed_mount3: 5608bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5609c92dc856SJan Kara flush_work(&sbi->s_error_work); 56102a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5611618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5612ac27a0ecSDave Kleikamp failed_mount2: 56131d0c3924STheodore Ts'o rcu_read_lock(); 56141d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5615ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 56161d0c3924STheodore Ts'o brelse(group_desc[i]); 56171d0c3924STheodore Ts'o kvfree(group_desc); 56181d0c3924STheodore Ts'o rcu_read_unlock(); 5619ac27a0ecSDave Kleikamp failed_mount: 56200441984aSDarrick J. Wong if (sbi->s_chksum_driver) 56210441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5622c83ad55eSGabriel Krisman Bertazi 5623c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5624f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5625c83ad55eSGabriel Krisman Bertazi #endif 5626c83ad55eSGabriel Krisman Bertazi 5627ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5628a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 56290ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5630ac27a0ecSDave Kleikamp #endif 5631ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5632afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5633ac27a0ecSDave Kleikamp brelse(bh); 5634afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5635ac27a0ecSDave Kleikamp out_fail: 5636ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 563707aa2ea1SLukas Czerner return err ? err : ret; 5638ac27a0ecSDave Kleikamp } 5639ac27a0ecSDave Kleikamp 5640*cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 56417edfd85bSLukas Czerner { 5642*cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 56437edfd85bSLukas Czerner struct ext4_sb_info *sbi; 56447edfd85bSLukas Czerner const char *descr; 5645*cebe85d5SLukas Czerner int ret; 56467edfd85bSLukas Czerner 5647*cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5648*cebe85d5SLukas Czerner if (!sbi) 5649*cebe85d5SLukas Czerner ret = -ENOMEM; 5650*cebe85d5SLukas Czerner 5651*cebe85d5SLukas Czerner fc->s_fs_info = sbi; 56527edfd85bSLukas Czerner 56537edfd85bSLukas Czerner /* Cleanup superblock name */ 56547edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 56557edfd85bSLukas Czerner 56567edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5657*cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5658*cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 56597edfd85bSLukas Czerner 5660*cebe85d5SLukas Czerner ret = __ext4_fill_super(fc, sb, fc->sb_flags & SB_SILENT); 56617edfd85bSLukas Czerner if (ret < 0) 56627edfd85bSLukas Czerner goto free_sbi; 56637edfd85bSLukas Czerner 5664*cebe85d5SLukas Czerner if (sbi->s_journal) { 56657edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 56667edfd85bSLukas Czerner descr = " journalled data mode"; 56677edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 56687edfd85bSLukas Czerner descr = " ordered data mode"; 56697edfd85bSLukas Czerner else 56707edfd85bSLukas Czerner descr = " writeback data mode"; 56717edfd85bSLukas Czerner } else 56727edfd85bSLukas Czerner descr = "out journal"; 56737edfd85bSLukas Czerner 56747edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 56757edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5676*cebe85d5SLukas Czerner "Quota mode: %s.", descr, ext4_quota_mode(sb)); 56777edfd85bSLukas Czerner 56787edfd85bSLukas Czerner return 0; 5679*cebe85d5SLukas Czerner 56807edfd85bSLukas Czerner free_sbi: 56817edfd85bSLukas Czerner ext4_free_sbi(sbi); 5682*cebe85d5SLukas Czerner fc->s_fs_info = NULL; 56837edfd85bSLukas Czerner return ret; 56847edfd85bSLukas Czerner } 56857edfd85bSLukas Czerner 5686*cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5687*cebe85d5SLukas Czerner { 5688*cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5689*cebe85d5SLukas Czerner } 5690*cebe85d5SLukas Czerner 5691ac27a0ecSDave Kleikamp /* 5692ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5693ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5694ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5695ac27a0ecSDave Kleikamp */ 5696617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5697ac27a0ecSDave Kleikamp { 5698617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5699ac27a0ecSDave Kleikamp 5700ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 570130773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 570230773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 57036866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5704ac27a0ecSDave Kleikamp 5705a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5706ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5707dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5708ac27a0ecSDave Kleikamp else 5709dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 57105bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 57115bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 57125bf5683aSHidehiro Kawai else 57135bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5714a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5715ac27a0ecSDave Kleikamp } 5716ac27a0ecSDave Kleikamp 5717c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5718ac27a0ecSDave Kleikamp unsigned int journal_inum) 5719ac27a0ecSDave Kleikamp { 5720ac27a0ecSDave Kleikamp struct inode *journal_inode; 5721ac27a0ecSDave Kleikamp 5722c6cb7e77SEric Whitney /* 5723c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5724c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5725c6cb7e77SEric Whitney * will try to delete it. 5726c6cb7e77SEric Whitney */ 57278a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 57281d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5729b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5730ac27a0ecSDave Kleikamp return NULL; 5731ac27a0ecSDave Kleikamp } 5732ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5733ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5734ac27a0ecSDave Kleikamp iput(journal_inode); 5735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5736ac27a0ecSDave Kleikamp return NULL; 5737ac27a0ecSDave Kleikamp } 5738ac27a0ecSDave Kleikamp 5739e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5740ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 57411d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5742b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5743ac27a0ecSDave Kleikamp iput(journal_inode); 5744ac27a0ecSDave Kleikamp return NULL; 5745ac27a0ecSDave Kleikamp } 5746c6cb7e77SEric Whitney return journal_inode; 5747c6cb7e77SEric Whitney } 5748c6cb7e77SEric Whitney 5749c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5750c6cb7e77SEric Whitney unsigned int journal_inum) 5751c6cb7e77SEric Whitney { 5752c6cb7e77SEric Whitney struct inode *journal_inode; 5753c6cb7e77SEric Whitney journal_t *journal; 5754c6cb7e77SEric Whitney 575511215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 575611215630SJan Kara return NULL; 5757c6cb7e77SEric Whitney 5758c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5759c6cb7e77SEric Whitney if (!journal_inode) 5760c6cb7e77SEric Whitney return NULL; 5761ac27a0ecSDave Kleikamp 5762dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5763ac27a0ecSDave Kleikamp if (!journal) { 5764b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5765ac27a0ecSDave Kleikamp iput(journal_inode); 5766ac27a0ecSDave Kleikamp return NULL; 5767ac27a0ecSDave Kleikamp } 5768ac27a0ecSDave Kleikamp journal->j_private = sb; 5769617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5770ac27a0ecSDave Kleikamp return journal; 5771ac27a0ecSDave Kleikamp } 5772ac27a0ecSDave Kleikamp 5773617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5774ac27a0ecSDave Kleikamp dev_t j_dev) 5775ac27a0ecSDave Kleikamp { 5776ac27a0ecSDave Kleikamp struct buffer_head *bh; 5777ac27a0ecSDave Kleikamp journal_t *journal; 5778617ba13bSMingming Cao ext4_fsblk_t start; 5779617ba13bSMingming Cao ext4_fsblk_t len; 5780ac27a0ecSDave Kleikamp int hblock, blocksize; 5781617ba13bSMingming Cao ext4_fsblk_t sb_block; 5782ac27a0ecSDave Kleikamp unsigned long offset; 5783617ba13bSMingming Cao struct ext4_super_block *es; 5784ac27a0ecSDave Kleikamp struct block_device *bdev; 5785ac27a0ecSDave Kleikamp 578611215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 578711215630SJan Kara return NULL; 57880390131bSFrank Mayhar 5789b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5790ac27a0ecSDave Kleikamp if (bdev == NULL) 5791ac27a0ecSDave Kleikamp return NULL; 5792ac27a0ecSDave Kleikamp 5793ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5794e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5795ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5797b31e1552SEric Sandeen "blocksize too small for journal device"); 5798ac27a0ecSDave Kleikamp goto out_bdev; 5799ac27a0ecSDave Kleikamp } 5800ac27a0ecSDave Kleikamp 5801617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5802617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5803ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5804ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5805b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5806b31e1552SEric Sandeen "external journal"); 5807ac27a0ecSDave Kleikamp goto out_bdev; 5808ac27a0ecSDave Kleikamp } 5809ac27a0ecSDave Kleikamp 58102716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5811617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5812ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5813617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5814b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5815b31e1552SEric Sandeen "bad superblock"); 5816ac27a0ecSDave Kleikamp brelse(bh); 5817ac27a0ecSDave Kleikamp goto out_bdev; 5818ac27a0ecSDave Kleikamp } 5819ac27a0ecSDave Kleikamp 5820df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5821df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5822df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5823df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5824df4763beSDarrick J. Wong "corrupt superblock"); 5825df4763beSDarrick J. Wong brelse(bh); 5826df4763beSDarrick J. Wong goto out_bdev; 5827df4763beSDarrick J. Wong } 5828df4763beSDarrick J. Wong 5829617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5830b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5831ac27a0ecSDave Kleikamp brelse(bh); 5832ac27a0ecSDave Kleikamp goto out_bdev; 5833ac27a0ecSDave Kleikamp } 5834ac27a0ecSDave Kleikamp 5835bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5836ac27a0ecSDave Kleikamp start = sb_block + 1; 5837ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5838ac27a0ecSDave Kleikamp 5839dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5840ac27a0ecSDave Kleikamp start, len, blocksize); 5841ac27a0ecSDave Kleikamp if (!journal) { 5842b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5843ac27a0ecSDave Kleikamp goto out_bdev; 5844ac27a0ecSDave Kleikamp } 5845ac27a0ecSDave Kleikamp journal->j_private = sb; 58462d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5847b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5848ac27a0ecSDave Kleikamp goto out_journal; 5849ac27a0ecSDave Kleikamp } 5850ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5852b31e1552SEric Sandeen "user (unsupported) - %d", 5853ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5854ac27a0ecSDave Kleikamp goto out_journal; 5855ac27a0ecSDave Kleikamp } 5856ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5857617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5858ac27a0ecSDave Kleikamp return journal; 58590b8e58a1SAndreas Dilger 5860ac27a0ecSDave Kleikamp out_journal: 5861dab291afSMingming Cao jbd2_journal_destroy(journal); 5862ac27a0ecSDave Kleikamp out_bdev: 5863617ba13bSMingming Cao ext4_blkdev_put(bdev); 5864ac27a0ecSDave Kleikamp return NULL; 5865ac27a0ecSDave Kleikamp } 5866ac27a0ecSDave Kleikamp 5867617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5868617ba13bSMingming Cao struct ext4_super_block *es, 5869ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5870ac27a0ecSDave Kleikamp { 5871ac27a0ecSDave Kleikamp journal_t *journal; 5872ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5873ac27a0ecSDave Kleikamp dev_t journal_dev; 5874ac27a0ecSDave Kleikamp int err = 0; 5875ac27a0ecSDave Kleikamp int really_read_only; 5876273108faSLukas Czerner int journal_dev_ro; 5877ac27a0ecSDave Kleikamp 587811215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 587911215630SJan Kara return -EFSCORRUPTED; 58800390131bSFrank Mayhar 5881ac27a0ecSDave Kleikamp if (journal_devnum && 5882ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5883b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5884b31e1552SEric Sandeen "numbers have changed"); 5885ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5886ac27a0ecSDave Kleikamp } else 5887ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5888ac27a0ecSDave Kleikamp 5889273108faSLukas Czerner if (journal_inum && journal_dev) { 5890273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5891273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5892273108faSLukas Czerner return -EINVAL; 5893273108faSLukas Czerner } 5894273108faSLukas Czerner 5895273108faSLukas Czerner if (journal_inum) { 5896273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5897273108faSLukas Czerner if (!journal) 5898273108faSLukas Czerner return -EINVAL; 5899273108faSLukas Czerner } else { 5900273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5901273108faSLukas Czerner if (!journal) 5902273108faSLukas Czerner return -EINVAL; 5903273108faSLukas Czerner } 5904273108faSLukas Czerner 5905273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5906273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5907273108faSLukas Czerner 5908273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5909273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5910273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5911273108faSLukas Czerner err = -EROFS; 5912273108faSLukas Czerner goto err_out; 5913273108faSLukas Czerner } 5914ac27a0ecSDave Kleikamp 5915ac27a0ecSDave Kleikamp /* 5916ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5917ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5918ac27a0ecSDave Kleikamp * can get read-write access to the device. 5919ac27a0ecSDave Kleikamp */ 5920e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5921bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5922b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5923b31e1552SEric Sandeen "required on readonly filesystem"); 5924ac27a0ecSDave Kleikamp if (really_read_only) { 5925b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5926d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5927d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5928273108faSLukas Czerner err = -EROFS; 5929273108faSLukas Czerner goto err_out; 5930ac27a0ecSDave Kleikamp } 5931b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5932b31e1552SEric Sandeen "be enabled during recovery"); 5933ac27a0ecSDave Kleikamp } 5934ac27a0ecSDave Kleikamp } 5935ac27a0ecSDave Kleikamp 593690576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5937b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 59384776004fSTheodore Ts'o 5939e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5940dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 59411c13d5c0STheodore Ts'o if (!err) { 59421c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 59431c13d5c0STheodore Ts'o if (save) 59441c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 59451c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5946dab291afSMingming Cao err = jbd2_journal_load(journal); 59471c13d5c0STheodore Ts'o if (save) 59481c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 59491c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 59501c13d5c0STheodore Ts'o kfree(save); 59511c13d5c0STheodore Ts'o } 5952ac27a0ecSDave Kleikamp 5953ac27a0ecSDave Kleikamp if (err) { 5954b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5955273108faSLukas Czerner goto err_out; 5956ac27a0ecSDave Kleikamp } 5957ac27a0ecSDave Kleikamp 5958617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 595911215630SJan Kara err = ext4_clear_journal_err(sb, es); 596011215630SJan Kara if (err) { 596111215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 596211215630SJan Kara jbd2_journal_destroy(journal); 596311215630SJan Kara return err; 596411215630SJan Kara } 5965ac27a0ecSDave Kleikamp 5966c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5967ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5968ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5969ac27a0ecSDave Kleikamp 5970ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 59714392fbc4SJan Kara ext4_commit_super(sb); 5972ac27a0ecSDave Kleikamp } 5973ac27a0ecSDave Kleikamp 5974ac27a0ecSDave Kleikamp return 0; 5975273108faSLukas Czerner 5976273108faSLukas Czerner err_out: 5977273108faSLukas Czerner jbd2_journal_destroy(journal); 5978273108faSLukas Czerner return err; 5979ac27a0ecSDave Kleikamp } 5980ac27a0ecSDave Kleikamp 59812d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 59822d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5983ac27a0ecSDave Kleikamp { 5984c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5985e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5986e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5987ac27a0ecSDave Kleikamp 598805c2c00fSJan Kara lock_buffer(sbh); 5989a17712c8SJon Derrick /* 599071290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 599171290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 599271290b36STheodore Ts'o * write time when we are mounting the root file system 599371290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 599471290b36STheodore Ts'o * for people who are east of GMT and who make their clock 599571290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 599671290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 599771290b36STheodore Ts'o * to complain and force a full file system check. 599871290b36STheodore Ts'o */ 59991751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 60006a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 6001afc32f7eSTheodore Ts'o es->s_kbytes_written = 6002e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 60038446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 6004e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 6005e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 600657042651STheodore Ts'o ext4_free_blocks_count_set(es, 6007e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 6008e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 6009e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 60107f93cff9STheodore Ts'o es->s_free_inodes_count = 60117f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 6012e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 6013c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 6014c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 6015c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 6016c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6017c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 6018c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 6019c92dc856SJan Kara &es->s_first_error_time_hi, 6020c92dc856SJan Kara sbi->s_first_error_time); 6021c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 6022c92dc856SJan Kara sizeof(es->s_first_error_func)); 6023c92dc856SJan Kara es->s_first_error_line = 6024c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 6025c92dc856SJan Kara es->s_first_error_ino = 6026c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 6027c92dc856SJan Kara es->s_first_error_block = 6028c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 6029c92dc856SJan Kara es->s_first_error_errcode = 6030c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 6031c92dc856SJan Kara } 6032c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 6033c92dc856SJan Kara &es->s_last_error_time_hi, 6034c92dc856SJan Kara sbi->s_last_error_time); 6035c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 6036c92dc856SJan Kara sizeof(es->s_last_error_func)); 6037c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 6038c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 6039c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 6040c92dc856SJan Kara es->s_last_error_errcode = 6041c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 6042c92dc856SJan Kara /* 6043c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 6044c92dc856SJan Kara * started already 6045c92dc856SJan Kara */ 6046c92dc856SJan Kara if (!es->s_error_count) 6047c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 6048c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 6049c92dc856SJan Kara sbi->s_add_error_count = 0; 6050c92dc856SJan Kara } 6051c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 6052c92dc856SJan Kara 605306db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 60542d01ddc8SJan Kara unlock_buffer(sbh); 60552d01ddc8SJan Kara } 60562d01ddc8SJan Kara 60572d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 60582d01ddc8SJan Kara { 60592d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 60602d01ddc8SJan Kara int error = 0; 60612d01ddc8SJan Kara 6062f88f1466SFengnan Chang if (!sbh) 6063f88f1466SFengnan Chang return -EINVAL; 6064f88f1466SFengnan Chang if (block_device_ejected(sb)) 6065f88f1466SFengnan Chang return -ENODEV; 60662d01ddc8SJan Kara 60672d01ddc8SJan Kara ext4_update_super(sb); 60682d01ddc8SJan Kara 6069e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 60704743f839SPranay Kr. Srivastava /* 60714743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 60724743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 60734743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 60744743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 60754743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 60764743f839SPranay Kr. Srivastava * write and hope for the best. 60774743f839SPranay Kr. Srivastava */ 60784743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 60794743f839SPranay Kr. Srivastava "superblock detected"); 60804743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 60814743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 60824743f839SPranay Kr. Srivastava } 60832d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 6084ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 6085564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 608600473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 6087c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6089b31e1552SEric Sandeen "superblock"); 6090914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6091914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 6092914258bfSTheodore Ts'o } 6093c4be0c1dSTakashi Sato return error; 6094ac27a0ecSDave Kleikamp } 6095ac27a0ecSDave Kleikamp 6096ac27a0ecSDave Kleikamp /* 6097ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6098ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6099ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6100ac27a0ecSDave Kleikamp */ 610111215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6102617ba13bSMingming Cao struct ext4_super_block *es) 6103ac27a0ecSDave Kleikamp { 610411215630SJan Kara int err; 6105617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6106ac27a0ecSDave Kleikamp 6107e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 610811215630SJan Kara if (journal != NULL) { 610911215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 611011215630SJan Kara "mounted!"); 611111215630SJan Kara return -EFSCORRUPTED; 611211215630SJan Kara } 611311215630SJan Kara return 0; 61140390131bSFrank Mayhar } 6115dab291afSMingming Cao jbd2_journal_lock_updates(journal); 611601d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 611711215630SJan Kara if (err < 0) 61187ffe1ea8SHidehiro Kawai goto out; 61197ffe1ea8SHidehiro Kawai 612002f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 612102f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 612202f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 612302f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 612402f310fcSJan Kara err = -EFSCORRUPTED; 612502f310fcSJan Kara goto out; 612602f310fcSJan Kara } 6127e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 612802f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 61294392fbc4SJan Kara ext4_commit_super(sb); 6130ac27a0ecSDave Kleikamp } 61317ffe1ea8SHidehiro Kawai out: 6132dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 613311215630SJan Kara return err; 6134ac27a0ecSDave Kleikamp } 6135ac27a0ecSDave Kleikamp 6136ac27a0ecSDave Kleikamp /* 6137ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6138ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6139ac27a0ecSDave Kleikamp * main filesystem now. 6140ac27a0ecSDave Kleikamp */ 614111215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6142617ba13bSMingming Cao struct ext4_super_block *es) 6143ac27a0ecSDave Kleikamp { 6144ac27a0ecSDave Kleikamp journal_t *journal; 6145ac27a0ecSDave Kleikamp int j_errno; 6146ac27a0ecSDave Kleikamp const char *errstr; 6147ac27a0ecSDave Kleikamp 614811215630SJan Kara if (!ext4_has_feature_journal(sb)) { 614911215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 615011215630SJan Kara return -EFSCORRUPTED; 615111215630SJan Kara } 61520390131bSFrank Mayhar 6153617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6154ac27a0ecSDave Kleikamp 6155ac27a0ecSDave Kleikamp /* 6156ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6157617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6158ac27a0ecSDave Kleikamp */ 6159ac27a0ecSDave Kleikamp 6160dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6161ac27a0ecSDave Kleikamp if (j_errno) { 6162ac27a0ecSDave Kleikamp char nbuf[16]; 6163ac27a0ecSDave Kleikamp 6164617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 616512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6166ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 616712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6168ac27a0ecSDave Kleikamp 6169617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6170617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 61714392fbc4SJan Kara ext4_commit_super(sb); 6172ac27a0ecSDave Kleikamp 6173dab291afSMingming Cao jbd2_journal_clear_err(journal); 6174d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6175ac27a0ecSDave Kleikamp } 617611215630SJan Kara return 0; 6177ac27a0ecSDave Kleikamp } 6178ac27a0ecSDave Kleikamp 6179ac27a0ecSDave Kleikamp /* 6180ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6181ac27a0ecSDave Kleikamp * and wait on the commit. 6182ac27a0ecSDave Kleikamp */ 6183617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6184ac27a0ecSDave Kleikamp { 6185ac27a0ecSDave Kleikamp journal_t *journal; 6186ac27a0ecSDave Kleikamp 6187bc98a42cSDavid Howells if (sb_rdonly(sb)) 6188ac27a0ecSDave Kleikamp return 0; 6189ac27a0ecSDave Kleikamp 6190617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6191b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6192ac27a0ecSDave Kleikamp } 6193ac27a0ecSDave Kleikamp 6194617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6195ac27a0ecSDave Kleikamp { 619614ce0cb4STheodore Ts'o int ret = 0; 61979eddacf9SJan Kara tid_t target; 619806a407f1SDmitry Monakhov bool needs_barrier = false; 61998d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6200ac27a0ecSDave Kleikamp 620149598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 62020db1ff22STheodore Ts'o return 0; 62030db1ff22STheodore Ts'o 62049bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 62052e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6206a1177825SJan Kara /* 6207a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6208a1177825SJan Kara * no dirty dquots 6209a1177825SJan Kara */ 6210a1177825SJan Kara dquot_writeback_dquots(sb, -1); 621106a407f1SDmitry Monakhov /* 621206a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 621306a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 621406a407f1SDmitry Monakhov * transaction_commit will do it for us. 621506a407f1SDmitry Monakhov */ 6216bda32530STheodore Ts'o if (sbi->s_journal) { 621706a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 621806a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 621906a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 622006a407f1SDmitry Monakhov needs_barrier = true; 622106a407f1SDmitry Monakhov 62228d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6223ac27a0ecSDave Kleikamp if (wait) 6224bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6225bda32530STheodore Ts'o target); 62260390131bSFrank Mayhar } 6227bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6228bda32530STheodore Ts'o needs_barrier = true; 622906a407f1SDmitry Monakhov if (needs_barrier) { 623006a407f1SDmitry Monakhov int err; 6231c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 623206a407f1SDmitry Monakhov if (!ret) 623306a407f1SDmitry Monakhov ret = err; 623406a407f1SDmitry Monakhov } 623506a407f1SDmitry Monakhov 623606a407f1SDmitry Monakhov return ret; 623706a407f1SDmitry Monakhov } 623806a407f1SDmitry Monakhov 6239ac27a0ecSDave Kleikamp /* 6240ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6241ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6242be4f27d3SYongqiang Yang * 6243be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 62448e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 62458e8ad8a5SJan Kara * modifications. 6246ac27a0ecSDave Kleikamp */ 6247c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6248ac27a0ecSDave Kleikamp { 6249c4be0c1dSTakashi Sato int error = 0; 6250c4be0c1dSTakashi Sato journal_t *journal; 6251ac27a0ecSDave Kleikamp 6252bc98a42cSDavid Howells if (sb_rdonly(sb)) 62539ca92389STheodore Ts'o return 0; 62549ca92389STheodore Ts'o 6255c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6256ac27a0ecSDave Kleikamp 6257bb044576STheodore Ts'o if (journal) { 6258ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6259dab291afSMingming Cao jbd2_journal_lock_updates(journal); 62607ffe1ea8SHidehiro Kawai 62617ffe1ea8SHidehiro Kawai /* 6262bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6263bb044576STheodore Ts'o * flush the journal. 62647ffe1ea8SHidehiro Kawai */ 626501d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 62666b0310fbSEric Sandeen if (error < 0) 62676b0310fbSEric Sandeen goto out; 6268ac27a0ecSDave Kleikamp 6269ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6270e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 627102f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 627202f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6273c642dc9eSEric Sandeen } 6274c642dc9eSEric Sandeen 62754392fbc4SJan Kara error = ext4_commit_super(sb); 62766b0310fbSEric Sandeen out: 6277bb044576STheodore Ts'o if (journal) 62788e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6279bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 62806b0310fbSEric Sandeen return error; 6281ac27a0ecSDave Kleikamp } 6282ac27a0ecSDave Kleikamp 6283ac27a0ecSDave Kleikamp /* 6284ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6285ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6286ac27a0ecSDave Kleikamp */ 6287c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6288ac27a0ecSDave Kleikamp { 6289bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 62909ca92389STheodore Ts'o return 0; 62919ca92389STheodore Ts'o 6292c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 62939ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6294e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 629502f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 629602f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6297c642dc9eSEric Sandeen } 6298c642dc9eSEric Sandeen 62994392fbc4SJan Kara ext4_commit_super(sb); 6300c4be0c1dSTakashi Sato return 0; 6301ac27a0ecSDave Kleikamp } 6302ac27a0ecSDave Kleikamp 6303673c6100STheodore Ts'o /* 6304673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6305673c6100STheodore Ts'o */ 6306673c6100STheodore Ts'o struct ext4_mount_options { 6307673c6100STheodore Ts'o unsigned long s_mount_opt; 6308a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 630908cefc7aSEric W. Biederman kuid_t s_resuid; 631008cefc7aSEric W. Biederman kgid_t s_resgid; 6311673c6100STheodore Ts'o unsigned long s_commit_interval; 6312673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6313673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6314673c6100STheodore Ts'o int s_jquota_fmt; 6315a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6316673c6100STheodore Ts'o #endif 6317673c6100STheodore Ts'o }; 6318673c6100STheodore Ts'o 63197edfd85bSLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb, 63207edfd85bSLukas Czerner int *flags) 6321ac27a0ecSDave Kleikamp { 63227edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6323617ba13bSMingming Cao struct ext4_super_block *es; 6324617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6325f25391ebSLukas Czerner unsigned long old_sb_flags, vfs_flags; 6326617ba13bSMingming Cao struct ext4_mount_options old_opts; 63278a266467STheodore Ts'o ext4_group_t g; 6328c5e06d10SJohann Lombardi int err = 0; 6329ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 63303bbef91bSAustin Kim int enable_quota = 0; 633103dafb5fSChen Gang int i, j; 633233458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6333ac27a0ecSDave Kleikamp #endif 6334b237e304SHarshad Shirwadkar 63357edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 633621ac738eSChengguang Xu 6337ac27a0ecSDave Kleikamp /* Store the original options */ 6338ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6339ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6340a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6341ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6342ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6343ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 634430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 634530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6346ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6347ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6348a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 634903dafb5fSChen Gang if (sbi->s_qf_names[i]) { 635033458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 635133458eabSTheodore Ts'o 635233458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 635303dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 635403dafb5fSChen Gang for (j = 0; j < i; j++) 635503dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 635603dafb5fSChen Gang return -ENOMEM; 635703dafb5fSChen Gang } 635803dafb5fSChen Gang } else 635903dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6360ac27a0ecSDave Kleikamp #endif 6361b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 63627edfd85bSLukas Czerner ctx->journal_ioprio = 6363b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6364ac27a0ecSDave Kleikamp 6365f25391ebSLukas Czerner /* 6366f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6367f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6368f25391ebSLukas Czerner * s_flags. Copy those selected flags from *flags to s_flags 6369f25391ebSLukas Czerner */ 6370f25391ebSLukas Czerner vfs_flags = SB_LAZYTIME | SB_I_VERSION; 6371f25391ebSLukas Czerner sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags); 6372f25391ebSLukas Czerner 63737edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6374ac27a0ecSDave Kleikamp 63756b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 63766b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 63776b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 63782d5b86e0SEric Sandeen "during remount not supported; ignoring"); 63792d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6380c6d3d56dSDarrick J. Wong } 6381c6d3d56dSDarrick J. Wong 63826ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 63836ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 63846ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63856ae6514bSPiotr Sarna "both data=journal and delalloc"); 63866ae6514bSPiotr Sarna err = -EINVAL; 63876ae6514bSPiotr Sarna goto restore_opts; 63886ae6514bSPiotr Sarna } 63896ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 63906ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63916ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 63926ae6514bSPiotr Sarna err = -EINVAL; 63936ae6514bSPiotr Sarna goto restore_opts; 63946ae6514bSPiotr Sarna } 6395ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6396ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6397ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6398ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6399ab04df78SJan Kara err = -EINVAL; 6400ab04df78SJan Kara goto restore_opts; 6401ab04df78SJan Kara } 6402923ae0ffSRoss Zwisler } 6403923ae0ffSRoss Zwisler 6404cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6405cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6406cdb7ee4cSTahsin Erdogan err = -EINVAL; 6407cdb7ee4cSTahsin Erdogan goto restore_opts; 6408cdb7ee4cSTahsin Erdogan } 6409cdb7ee4cSTahsin Erdogan 64109b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6411124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6412ac27a0ecSDave Kleikamp 64131751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 64141751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6415ac27a0ecSDave Kleikamp 6416ac27a0ecSDave Kleikamp es = sbi->s_es; 6417ac27a0ecSDave Kleikamp 6418b3881f74STheodore Ts'o if (sbi->s_journal) { 6419617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 64207edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6421b3881f74STheodore Ts'o } 6422ac27a0ecSDave Kleikamp 6423c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6424c92dc856SJan Kara flush_work(&sbi->s_error_work); 6425c92dc856SJan Kara 64261751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 64279b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6428ac27a0ecSDave Kleikamp err = -EROFS; 6429ac27a0ecSDave Kleikamp goto restore_opts; 6430ac27a0ecSDave Kleikamp } 6431ac27a0ecSDave Kleikamp 64321751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 643338c03b34STheodore Ts'o err = sync_filesystem(sb); 643438c03b34STheodore Ts'o if (err < 0) 643538c03b34STheodore Ts'o goto restore_opts; 64360f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 64370f0dd62fSChristoph Hellwig if (err < 0) 6438c79d967dSChristoph Hellwig goto restore_opts; 6439c79d967dSChristoph Hellwig 6440ac27a0ecSDave Kleikamp /* 6441ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6442ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6443ac27a0ecSDave Kleikamp */ 64441751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6445ac27a0ecSDave Kleikamp 6446ac27a0ecSDave Kleikamp /* 6447ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6448ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6449ac27a0ecSDave Kleikamp * mark the partition as valid again. 6450ac27a0ecSDave Kleikamp */ 6451617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6452617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6453ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6454ac27a0ecSDave Kleikamp 645511215630SJan Kara if (sbi->s_journal) { 645611215630SJan Kara /* 645711215630SJan Kara * We let remount-ro finish even if marking fs 645811215630SJan Kara * as clean failed... 645911215630SJan Kara */ 6460617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 646111215630SJan Kara } 6462ac27a0ecSDave Kleikamp } else { 6463a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6464e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 64652cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6466ac27a0ecSDave Kleikamp err = -EROFS; 6467ac27a0ecSDave Kleikamp goto restore_opts; 6468ac27a0ecSDave Kleikamp } 6469ead6596bSEric Sandeen /* 64708a266467STheodore Ts'o * Make sure the group descriptor checksums 64710b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 64728a266467STheodore Ts'o */ 64738a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 64748a266467STheodore Ts'o struct ext4_group_desc *gdp = 64758a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 64768a266467STheodore Ts'o 6477feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6478b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6479b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6480e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 64818a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 64826a797d27SDarrick J. Wong err = -EFSBADCRC; 64838a266467STheodore Ts'o goto restore_opts; 64848a266467STheodore Ts'o } 64858a266467STheodore Ts'o } 64868a266467STheodore Ts'o 64878a266467STheodore Ts'o /* 6488ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6489ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6490ead6596bSEric Sandeen * require a full umount/remount for now. 6491ead6596bSEric Sandeen */ 649202f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6493b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6494ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6495ead6596bSEric Sandeen "orphan inode list. Please " 6496b31e1552SEric Sandeen "umount/remount instead"); 6497ead6596bSEric Sandeen err = -EINVAL; 6498ead6596bSEric Sandeen goto restore_opts; 6499ead6596bSEric Sandeen } 6500ead6596bSEric Sandeen 6501ac27a0ecSDave Kleikamp /* 6502ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6503ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6504ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6505ac27a0ecSDave Kleikamp * the partition.) 6506ac27a0ecSDave Kleikamp */ 650711215630SJan Kara if (sbi->s_journal) { 650811215630SJan Kara err = ext4_clear_journal_err(sb, es); 650911215630SJan Kara if (err) 651011215630SJan Kara goto restore_opts; 651111215630SJan Kara } 6512ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6513c89128a0SJaegeuk Kim 6514c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6515c89128a0SJaegeuk Kim if (err) 6516c89128a0SJaegeuk Kim goto restore_opts; 6517c89128a0SJaegeuk Kim 65181751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6519e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6520c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6521c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6522c5e06d10SJohann Lombardi err = -EROFS; 6523c5e06d10SJohann Lombardi goto restore_opts; 6524c5e06d10SJohann Lombardi } 65253bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6526c79d967dSChristoph Hellwig enable_quota = 1; 65273bbef91bSAustin Kim #endif 6528ac27a0ecSDave Kleikamp } 6529ac27a0ecSDave Kleikamp } 6530bfff6873SLukas Czerner 6531bfff6873SLukas Czerner /* 6532bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6533bfff6873SLukas Czerner * current settings 6534bfff6873SLukas Czerner */ 6535bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6536bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6537bfff6873SLukas Czerner else { 6538bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6539bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6540bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6541bfff6873SLukas Czerner } 6542bfff6873SLukas Czerner 65430f5bde1dSJan Kara /* 65440f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 65450f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 65460f5bde1dSJan Kara * succeed. 65470f5bde1dSJan Kara */ 6548dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6549d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6550d176b1f6SJan Kara if (err) 6551d176b1f6SJan Kara goto restore_opts; 65520f5bde1dSJan Kara } 6553d176b1f6SJan Kara 6554c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 65554392fbc4SJan Kara err = ext4_commit_super(sb); 6556c89128a0SJaegeuk Kim if (err) 6557c89128a0SJaegeuk Kim goto restore_opts; 6558c89128a0SJaegeuk Kim } 65590390131bSFrank Mayhar 6560ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6561ac27a0ecSDave Kleikamp /* Release old quota file names */ 6562a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6563ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 65647c319d32SAditya Kali if (enable_quota) { 65657c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 65660f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6567e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 65687c319d32SAditya Kali err = ext4_enable_quotas(sb); 656907724f98STheodore Ts'o if (err) 65707c319d32SAditya Kali goto restore_opts; 65717c319d32SAditya Kali } 65727c319d32SAditya Kali } 65737c319d32SAditya Kali #endif 6574dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65750f5bde1dSJan Kara ext4_release_system_zone(sb); 6576d4c402d9SCurt Wohlgemuth 657761bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 657861bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 657961bb4a1cSTheodore Ts'o 6580f25391ebSLukas Czerner /* 6581f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6582f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6583f25391ebSLukas Czerner * s_flags. Copy those selected flags from s_flags to *flags 6584f25391ebSLukas Czerner */ 6585f25391ebSLukas Czerner *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags); 6586f25391ebSLukas Czerner 6587ac27a0ecSDave Kleikamp return 0; 65880b8e58a1SAndreas Dilger 6589ac27a0ecSDave Kleikamp restore_opts: 6590ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6591ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6592a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6593ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6594ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6595ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 659630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 659730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6598dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65990f5bde1dSJan Kara ext4_release_system_zone(sb); 6600ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6601ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6602a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 660333458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 660433458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6605ac27a0ecSDave Kleikamp } 660633458eabSTheodore Ts'o synchronize_rcu(); 660733458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 660833458eabSTheodore Ts'o kfree(to_free[i]); 6609ac27a0ecSDave Kleikamp #endif 661061bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 661161bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6612ac27a0ecSDave Kleikamp return err; 6613ac27a0ecSDave Kleikamp } 6614ac27a0ecSDave Kleikamp 6615*cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 66167edfd85bSLukas Czerner { 6617*cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 6618*cebe85d5SLukas Czerner int flags = fc->sb_flags; 66197edfd85bSLukas Czerner int ret; 66207edfd85bSLukas Czerner 6621*cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 66227edfd85bSLukas Czerner 6623*cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 66247edfd85bSLukas Czerner if (ret < 0) 66257edfd85bSLukas Czerner return ret; 6626*cebe85d5SLukas Czerner 6627*cebe85d5SLukas Czerner ret = __ext4_remount(fc, sb, &flags); 6628*cebe85d5SLukas Czerner if (ret < 0) 6629*cebe85d5SLukas Czerner return ret; 6630*cebe85d5SLukas Czerner 6631*cebe85d5SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.", 6632*cebe85d5SLukas Czerner ext4_quota_mode(sb)); 6633*cebe85d5SLukas Czerner 6634*cebe85d5SLukas Czerner return 0; 66357edfd85bSLukas Czerner } 66367edfd85bSLukas Czerner 6637689c958cSLi Xi #ifdef CONFIG_QUOTA 6638689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6639689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6640689c958cSLi Xi { 6641689c958cSLi Xi struct kqid qid; 6642689c958cSLi Xi struct dquot *dquot; 6643689c958cSLi Xi u64 limit; 6644689c958cSLi Xi u64 curblock; 6645689c958cSLi Xi 6646689c958cSLi Xi qid = make_kqid_projid(projid); 6647689c958cSLi Xi dquot = dqget(sb, qid); 6648689c958cSLi Xi if (IS_ERR(dquot)) 6649689c958cSLi Xi return PTR_ERR(dquot); 66507b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6651689c958cSLi Xi 6652a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6653a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 665457c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 665557c32ea4SChengguang Xu 6656689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6657f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6658f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6659689c958cSLi Xi buf->f_blocks = limit; 6660689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6661689c958cSLi Xi (buf->f_blocks > curblock) ? 6662689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6663689c958cSLi Xi } 6664689c958cSLi Xi 6665a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6666a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6667689c958cSLi Xi if (limit && buf->f_files > limit) { 6668689c958cSLi Xi buf->f_files = limit; 6669689c958cSLi Xi buf->f_ffree = 6670689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6671689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6672689c958cSLi Xi } 6673689c958cSLi Xi 66747b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6675689c958cSLi Xi dqput(dquot); 6676689c958cSLi Xi return 0; 6677689c958cSLi Xi } 6678689c958cSLi Xi #endif 6679689c958cSLi Xi 6680617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6681ac27a0ecSDave Kleikamp { 6682ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6683617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6684617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 668527dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6686d02a9391SKazuya Mio s64 bfree; 668727dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6688ac27a0ecSDave Kleikamp 6689952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6690952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6691ac27a0ecSDave Kleikamp 6692617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6693ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6694b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 669557042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 669657042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6697d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 669857042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 669927dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 670027dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 670127dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6702ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6703ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 670452d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6705617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 67069591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 67070b8e58a1SAndreas Dilger 6708689c958cSLi Xi #ifdef CONFIG_QUOTA 6709689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6710689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6711689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6712689c958cSLi Xi #endif 6713ac27a0ecSDave Kleikamp return 0; 6714ac27a0ecSDave Kleikamp } 6715ac27a0ecSDave Kleikamp 6716ac27a0ecSDave Kleikamp 6717ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6718ac27a0ecSDave Kleikamp 6719bc8230eeSJan Kara /* 6720bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6721bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6722bc8230eeSJan Kara */ 6723ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6724ac27a0ecSDave Kleikamp { 67254c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6726ac27a0ecSDave Kleikamp } 6727ac27a0ecSDave Kleikamp 6728617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6729ac27a0ecSDave Kleikamp { 6730ac27a0ecSDave Kleikamp int ret, err; 6731ac27a0ecSDave Kleikamp handle_t *handle; 6732ac27a0ecSDave Kleikamp struct inode *inode; 6733ac27a0ecSDave Kleikamp 6734ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 67359924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6736617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6737ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6738ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6739ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6740617ba13bSMingming Cao err = ext4_journal_stop(handle); 6741ac27a0ecSDave Kleikamp if (!ret) 6742ac27a0ecSDave Kleikamp ret = err; 6743ac27a0ecSDave Kleikamp return ret; 6744ac27a0ecSDave Kleikamp } 6745ac27a0ecSDave Kleikamp 6746617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6747ac27a0ecSDave Kleikamp { 6748ac27a0ecSDave Kleikamp int ret, err; 6749ac27a0ecSDave Kleikamp handle_t *handle; 6750ac27a0ecSDave Kleikamp 67519924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6752617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6753ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6754ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6755ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6756617ba13bSMingming Cao err = ext4_journal_stop(handle); 6757ac27a0ecSDave Kleikamp if (!ret) 6758ac27a0ecSDave Kleikamp ret = err; 6759ac27a0ecSDave Kleikamp return ret; 6760ac27a0ecSDave Kleikamp } 6761ac27a0ecSDave Kleikamp 6762617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6763ac27a0ecSDave Kleikamp { 6764ac27a0ecSDave Kleikamp int ret, err; 6765ac27a0ecSDave Kleikamp handle_t *handle; 6766ac27a0ecSDave Kleikamp 67679924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6768617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 67699c3013e9SJan Kara if (IS_ERR(handle)) { 67709c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 67719c3013e9SJan Kara dquot_release(dquot); 6772ac27a0ecSDave Kleikamp return PTR_ERR(handle); 67739c3013e9SJan Kara } 6774ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6775617ba13bSMingming Cao err = ext4_journal_stop(handle); 6776ac27a0ecSDave Kleikamp if (!ret) 6777ac27a0ecSDave Kleikamp ret = err; 6778ac27a0ecSDave Kleikamp return ret; 6779ac27a0ecSDave Kleikamp } 6780ac27a0ecSDave Kleikamp 6781617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6782ac27a0ecSDave Kleikamp { 6783262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6784262b4662SJan Kara 6785f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6786ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6787617ba13bSMingming Cao return ext4_write_dquot(dquot); 6788ac27a0ecSDave Kleikamp } else { 6789ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6790ac27a0ecSDave Kleikamp } 6791ac27a0ecSDave Kleikamp } 6792ac27a0ecSDave Kleikamp 6793617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6794ac27a0ecSDave Kleikamp { 6795ac27a0ecSDave Kleikamp int ret, err; 6796ac27a0ecSDave Kleikamp handle_t *handle; 6797ac27a0ecSDave Kleikamp 6798ac27a0ecSDave Kleikamp /* Data block + inode block */ 67992b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6800ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6801ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6802ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6803617ba13bSMingming Cao err = ext4_journal_stop(handle); 6804ac27a0ecSDave Kleikamp if (!ret) 6805ac27a0ecSDave Kleikamp ret = err; 6806ac27a0ecSDave Kleikamp return ret; 6807ac27a0ecSDave Kleikamp } 6808ac27a0ecSDave Kleikamp 6809daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6810daf647d2STheodore Ts'o { 6811daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6812daf647d2STheodore Ts'o 6813daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6814daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6815daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6816daf647d2STheodore Ts'o * because the name of the lock is set using the 6817daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6818daf647d2STheodore Ts'o */ 6819daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6820daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6821daf647d2STheodore Ts'o } 6822daf647d2STheodore Ts'o 6823ac27a0ecSDave Kleikamp /* 6824ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6825ac27a0ecSDave Kleikamp */ 6826617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 68278c54ca9cSAl Viro const struct path *path) 6828ac27a0ecSDave Kleikamp { 6829ac27a0ecSDave Kleikamp int err; 6830ac27a0ecSDave Kleikamp 6831ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6832ac27a0ecSDave Kleikamp return -EINVAL; 68330623543bSJan Kara 6834ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6835d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6836ac27a0ecSDave Kleikamp return -EXDEV; 6837e0770e91SJan Kara 6838e0770e91SJan Kara /* Quota already enabled for this file? */ 6839e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6840e0770e91SJan Kara return -EBUSY; 6841e0770e91SJan Kara 68420623543bSJan Kara /* Journaling quota? */ 68430623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 68442b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6845f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6846b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6847b31e1552SEric Sandeen "Quota file not on filesystem root. " 6848b31e1552SEric Sandeen "Journaled quota will not work"); 684991389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 685091389240SJan Kara } else { 685191389240SJan Kara /* 685291389240SJan Kara * Clear the flag just in case mount options changed since 685391389240SJan Kara * last time. 685491389240SJan Kara */ 685591389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 68560623543bSJan Kara } 68570623543bSJan Kara 68580623543bSJan Kara /* 68590623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 68600623543bSJan Kara * all updates to the file when we bypass pagecache... 68610623543bSJan Kara */ 68620390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 68632b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 68640623543bSJan Kara /* 68650623543bSJan Kara * We don't need to lock updates but journal_flush() could 68660623543bSJan Kara * otherwise be livelocked... 68670623543bSJan Kara */ 68680623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 686901d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 68700623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6871f00c9e44SJan Kara if (err) 68727ffe1ea8SHidehiro Kawai return err; 68737ffe1ea8SHidehiro Kawai } 6874957153fcSJan Kara 6875daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6876daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6877957153fcSJan Kara if (err) { 6878daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6879daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6880957153fcSJan Kara } else { 6881957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6882957153fcSJan Kara handle_t *handle; 6883957153fcSJan Kara 688461a92987SJan Kara /* 688561a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 688661a92987SJan Kara * files. If this fails, we return success anyway since quotas 688761a92987SJan Kara * are already enabled and this is not a hard failure. 688861a92987SJan Kara */ 6889957153fcSJan Kara inode_lock(inode); 6890957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6891957153fcSJan Kara if (IS_ERR(handle)) 6892957153fcSJan Kara goto unlock_inode; 6893957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6894957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6895957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 68964209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6897957153fcSJan Kara ext4_journal_stop(handle); 6898957153fcSJan Kara unlock_inode: 6899957153fcSJan Kara inode_unlock(inode); 6900957153fcSJan Kara } 6901daf647d2STheodore Ts'o return err; 6902ac27a0ecSDave Kleikamp } 6903ac27a0ecSDave Kleikamp 69047c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 69057c319d32SAditya Kali unsigned int flags) 69067c319d32SAditya Kali { 69077c319d32SAditya Kali int err; 69087c319d32SAditya Kali struct inode *qf_inode; 6909a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 69107c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6911689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6912689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 69137c319d32SAditya Kali }; 69147c319d32SAditya Kali 6915e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 69167c319d32SAditya Kali 69177c319d32SAditya Kali if (!qf_inums[type]) 69187c319d32SAditya Kali return -EPERM; 69197c319d32SAditya Kali 69208a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 69217c319d32SAditya Kali if (IS_ERR(qf_inode)) { 69227c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 69237c319d32SAditya Kali return PTR_ERR(qf_inode); 69247c319d32SAditya Kali } 69257c319d32SAditya Kali 6926bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6927bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6928daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 69297212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6930daf647d2STheodore Ts'o if (err) 6931daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 693261157b24SPan Bian iput(qf_inode); 69337c319d32SAditya Kali 69347c319d32SAditya Kali return err; 69357c319d32SAditya Kali } 69367c319d32SAditya Kali 69377c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 693825c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 69397c319d32SAditya Kali { 69407c319d32SAditya Kali int type, err = 0; 6941a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 69427c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6943689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6944689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 69457c319d32SAditya Kali }; 694649da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 694749da9392SJan Kara test_opt(sb, USRQUOTA), 694849da9392SJan Kara test_opt(sb, GRPQUOTA), 694949da9392SJan Kara test_opt(sb, PRJQUOTA), 695049da9392SJan Kara }; 69517c319d32SAditya Kali 695291389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6953a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 69547c319d32SAditya Kali if (qf_inums[type]) { 69557c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 695649da9392SJan Kara DQUOT_USAGE_ENABLED | 695749da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 69587c319d32SAditya Kali if (err) { 69597c319d32SAditya Kali ext4_warning(sb, 696072ba7450STheodore Ts'o "Failed to enable quota tracking " 696172ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 696272ba7450STheodore Ts'o "e2fsck to fix.", type, err); 69637f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 69647f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 69657f144fd0SJunichi Uekawa 69667c319d32SAditya Kali return err; 69677c319d32SAditya Kali } 69687c319d32SAditya Kali } 69697c319d32SAditya Kali } 69707c319d32SAditya Kali return 0; 69717c319d32SAditya Kali } 69727c319d32SAditya Kali 6973ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6974ca0e05e4SDmitry Monakhov { 697521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 697621f97697SJan Kara handle_t *handle; 6977957153fcSJan Kara int err; 697821f97697SJan Kara 697987009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 698087009d86SDmitry Monakhov * Caller already holds s_umount sem */ 698187009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6982ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6983ca0e05e4SDmitry Monakhov 6984957153fcSJan Kara if (!inode || !igrab(inode)) 69850b268590SAmir Goldstein goto out; 69860b268590SAmir Goldstein 6987957153fcSJan Kara err = dquot_quota_off(sb, type); 6988964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6989957153fcSJan Kara goto out_put; 6990957153fcSJan Kara 6991957153fcSJan Kara inode_lock(inode); 699261a92987SJan Kara /* 699361a92987SJan Kara * Update modification times of quota files when userspace can 699461a92987SJan Kara * start looking at them. If we fail, we return success anyway since 699561a92987SJan Kara * this is not a hard failure and quotas are already disabled. 699661a92987SJan Kara */ 69979924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 69984209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 69994209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 7000957153fcSJan Kara goto out_unlock; 70014209ae12SHarshad Shirwadkar } 7002957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 7003957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 7004eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 70054209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 700621f97697SJan Kara ext4_journal_stop(handle); 7007957153fcSJan Kara out_unlock: 7008957153fcSJan Kara inode_unlock(inode); 7009957153fcSJan Kara out_put: 7010964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 7011957153fcSJan Kara iput(inode); 7012957153fcSJan Kara return err; 701321f97697SJan Kara out: 7014ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 7015ca0e05e4SDmitry Monakhov } 7016ca0e05e4SDmitry Monakhov 7017ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 7018ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 7019ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 7020ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 7021617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 7022ac27a0ecSDave Kleikamp size_t len, loff_t off) 7023ac27a0ecSDave Kleikamp { 7024ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7025725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 7026ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 7027ac27a0ecSDave Kleikamp int tocopy; 7028ac27a0ecSDave Kleikamp size_t toread; 7029ac27a0ecSDave Kleikamp struct buffer_head *bh; 7030ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 7031ac27a0ecSDave Kleikamp 7032ac27a0ecSDave Kleikamp if (off > i_size) 7033ac27a0ecSDave Kleikamp return 0; 7034ac27a0ecSDave Kleikamp if (off+len > i_size) 7035ac27a0ecSDave Kleikamp len = i_size-off; 7036ac27a0ecSDave Kleikamp toread = len; 7037ac27a0ecSDave Kleikamp while (toread > 0) { 7038ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 7039ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 70401c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 70411c215028STheodore Ts'o if (IS_ERR(bh)) 70421c215028STheodore Ts'o return PTR_ERR(bh); 7043ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 7044ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 7045ac27a0ecSDave Kleikamp else 7046ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 7047ac27a0ecSDave Kleikamp brelse(bh); 7048ac27a0ecSDave Kleikamp offset = 0; 7049ac27a0ecSDave Kleikamp toread -= tocopy; 7050ac27a0ecSDave Kleikamp data += tocopy; 7051ac27a0ecSDave Kleikamp blk++; 7052ac27a0ecSDave Kleikamp } 7053ac27a0ecSDave Kleikamp return len; 7054ac27a0ecSDave Kleikamp } 7055ac27a0ecSDave Kleikamp 7056ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 7057ac27a0ecSDave Kleikamp * enough credits) */ 7058617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 7059ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 7060ac27a0ecSDave Kleikamp { 7061ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7062725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 70634209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 7064c5e298aeSTheodore Ts'o int retries = 0; 7065ac27a0ecSDave Kleikamp struct buffer_head *bh; 7066ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 7067ac27a0ecSDave Kleikamp 70680390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 7069b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 7070b31e1552SEric Sandeen " cancelled because transaction is not started", 70719c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 70729c3013e9SJan Kara return -EIO; 70739c3013e9SJan Kara } 707467eeb568SDmitry Monakhov /* 707567eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 707667eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 707767eeb568SDmitry Monakhov */ 707867eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 707967eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 708067eeb568SDmitry Monakhov " cancelled because not block aligned", 708167eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 708267eeb568SDmitry Monakhov return -EIO; 708367eeb568SDmitry Monakhov } 708467eeb568SDmitry Monakhov 7085c5e298aeSTheodore Ts'o do { 7086c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7087c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7088c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 708945586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7090c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 70911c215028STheodore Ts'o if (IS_ERR(bh)) 70921c215028STheodore Ts'o return PTR_ERR(bh); 7093ac27a0ecSDave Kleikamp if (!bh) 7094ac27a0ecSDave Kleikamp goto out; 70955d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7096188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7097ac27a0ecSDave Kleikamp if (err) { 7098ac27a0ecSDave Kleikamp brelse(bh); 70991c215028STheodore Ts'o return err; 7100ac27a0ecSDave Kleikamp } 7101ac27a0ecSDave Kleikamp lock_buffer(bh); 710267eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7103ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7104ac27a0ecSDave Kleikamp unlock_buffer(bh); 71050390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7106ac27a0ecSDave Kleikamp brelse(bh); 7107ac27a0ecSDave Kleikamp out: 710867eeb568SDmitry Monakhov if (inode->i_size < off + len) { 710967eeb568SDmitry Monakhov i_size_write(inode, off + len); 7110617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 71114209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 71124209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 71134209ae12SHarshad Shirwadkar err = err2; 711421f97697SJan Kara } 71154209ae12SHarshad Shirwadkar return err ? err : len; 7116ac27a0ecSDave Kleikamp } 7117ac27a0ecSDave Kleikamp #endif 7118ac27a0ecSDave Kleikamp 7119c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 712024b58424STheodore Ts'o static inline void register_as_ext2(void) 712124b58424STheodore Ts'o { 712224b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 712324b58424STheodore Ts'o if (err) 712424b58424STheodore Ts'o printk(KERN_WARNING 712524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 712624b58424STheodore Ts'o } 712724b58424STheodore Ts'o 712824b58424STheodore Ts'o static inline void unregister_as_ext2(void) 712924b58424STheodore Ts'o { 713024b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 713124b58424STheodore Ts'o } 71322035e776STheodore Ts'o 71332035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 71342035e776STheodore Ts'o { 7135e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 71362035e776STheodore Ts'o return 0; 7137bc98a42cSDavid Howells if (sb_rdonly(sb)) 71382035e776STheodore Ts'o return 1; 7139e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 71402035e776STheodore Ts'o return 0; 71412035e776STheodore Ts'o return 1; 71422035e776STheodore Ts'o } 714324b58424STheodore Ts'o #else 714424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 714524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 71462035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 714724b58424STheodore Ts'o #endif 714824b58424STheodore Ts'o 714924b58424STheodore Ts'o static inline void register_as_ext3(void) 715024b58424STheodore Ts'o { 715124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 715224b58424STheodore Ts'o if (err) 715324b58424STheodore Ts'o printk(KERN_WARNING 715424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 715524b58424STheodore Ts'o } 715624b58424STheodore Ts'o 715724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 715824b58424STheodore Ts'o { 715924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 716024b58424STheodore Ts'o } 71612035e776STheodore Ts'o 71622035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 71632035e776STheodore Ts'o { 7164e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 71652035e776STheodore Ts'o return 0; 7166e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 71672035e776STheodore Ts'o return 0; 7168bc98a42cSDavid Howells if (sb_rdonly(sb)) 71692035e776STheodore Ts'o return 1; 7170e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 71712035e776STheodore Ts'o return 0; 71722035e776STheodore Ts'o return 1; 71732035e776STheodore Ts'o } 717424b58424STheodore Ts'o 717503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7176ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 717703010a33STheodore Ts'o .name = "ext4", 7178*cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7179*cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7180ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 718114f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7182ac27a0ecSDave Kleikamp }; 71837f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7184ac27a0ecSDave Kleikamp 7185e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7186e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7187e9e3bcecSEric Sandeen 71885dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7189ac27a0ecSDave Kleikamp { 7190e9e3bcecSEric Sandeen int i, err; 7191c9de560dSAlex Tomas 7192e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 719307c0c5d8SAl Viro ext4_li_info = NULL; 719407c0c5d8SAl Viro 71959a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 719612e9b892SDmitry Monakhov ext4_check_flag_values(); 7197e9e3bcecSEric Sandeen 7198e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7199e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7200e9e3bcecSEric Sandeen 720151865fdaSZheng Liu err = ext4_init_es(); 72026fd058f7STheodore Ts'o if (err) 72036fd058f7STheodore Ts'o return err; 720451865fdaSZheng Liu 72051dc0aa46SEric Whitney err = ext4_init_pending(); 72061dc0aa46SEric Whitney if (err) 720722cfe4b4SEric Biggers goto out7; 720822cfe4b4SEric Biggers 720922cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 721022cfe4b4SEric Biggers if (err) 72111dc0aa46SEric Whitney goto out6; 72121dc0aa46SEric Whitney 721351865fdaSZheng Liu err = ext4_init_pageio(); 721451865fdaSZheng Liu if (err) 7215b5799018STheodore Ts'o goto out5; 721651865fdaSZheng Liu 72175dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7218bd2d0210STheodore Ts'o if (err) 7219b5799018STheodore Ts'o goto out4; 7220857ac889SLukas Czerner 7221b5799018STheodore Ts'o err = ext4_init_sysfs(); 7222dd68314cSTheodore Ts'o if (err) 7223b5799018STheodore Ts'o goto out3; 7224857ac889SLukas Czerner 72255dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7226ac27a0ecSDave Kleikamp if (err) 7227c9de560dSAlex Tomas goto out2; 7228ac27a0ecSDave Kleikamp err = init_inodecache(); 7229ac27a0ecSDave Kleikamp if (err) 7230ac27a0ecSDave Kleikamp goto out1; 7231aa75f4d3SHarshad Shirwadkar 7232aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7233aa75f4d3SHarshad Shirwadkar if (err) 7234aa75f4d3SHarshad Shirwadkar goto out05; 7235aa75f4d3SHarshad Shirwadkar 723624b58424STheodore Ts'o register_as_ext3(); 72372035e776STheodore Ts'o register_as_ext2(); 723803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7239ac27a0ecSDave Kleikamp if (err) 7240ac27a0ecSDave Kleikamp goto out; 7241bfff6873SLukas Czerner 7242ac27a0ecSDave Kleikamp return 0; 7243ac27a0ecSDave Kleikamp out: 724424b58424STheodore Ts'o unregister_as_ext2(); 724524b58424STheodore Ts'o unregister_as_ext3(); 7246aa75f4d3SHarshad Shirwadkar out05: 7247ac27a0ecSDave Kleikamp destroy_inodecache(); 7248ac27a0ecSDave Kleikamp out1: 72495dabfc78STheodore Ts'o ext4_exit_mballoc(); 72509c191f70ST Makphaibulchoke out2: 7251b5799018STheodore Ts'o ext4_exit_sysfs(); 7252b5799018STheodore Ts'o out3: 7253dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7254b5799018STheodore Ts'o out4: 72555dabfc78STheodore Ts'o ext4_exit_pageio(); 7256b5799018STheodore Ts'o out5: 725722cfe4b4SEric Biggers ext4_exit_post_read_processing(); 72581dc0aa46SEric Whitney out6: 725922cfe4b4SEric Biggers ext4_exit_pending(); 726022cfe4b4SEric Biggers out7: 726151865fdaSZheng Liu ext4_exit_es(); 726251865fdaSZheng Liu 7263ac27a0ecSDave Kleikamp return err; 7264ac27a0ecSDave Kleikamp } 7265ac27a0ecSDave Kleikamp 72665dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7267ac27a0ecSDave Kleikamp { 7268bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 726924b58424STheodore Ts'o unregister_as_ext2(); 727024b58424STheodore Ts'o unregister_as_ext3(); 727103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7272ac27a0ecSDave Kleikamp destroy_inodecache(); 72735dabfc78STheodore Ts'o ext4_exit_mballoc(); 7274b5799018STheodore Ts'o ext4_exit_sysfs(); 72755dabfc78STheodore Ts'o ext4_exit_system_zone(); 72765dabfc78STheodore Ts'o ext4_exit_pageio(); 727722cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7278dd12ed14SEric Sandeen ext4_exit_es(); 72791dc0aa46SEric Whitney ext4_exit_pending(); 7280ac27a0ecSDave Kleikamp } 7281ac27a0ecSDave Kleikamp 7282ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 728383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7284ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 72857ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 72865dabfc78STheodore Ts'o module_init(ext4_init_fs) 72875dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7288