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); 93cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc); 94cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc); 95cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc); 96cebe85d5SLukas Czerner static int ext4_init_fs_context(struct fs_context *fc); 97cebe85d5SLukas 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, 127cebe85d5SLukas Czerner .get_tree = ext4_get_tree, 128cebe85d5SLukas Czerner .reconfigure = ext4_reconfigure, 129cebe85d5SLukas 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", 137cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 138cebe85d5SLukas 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", 153cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 154cebe85d5SLukas 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, 1692ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 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, 1701ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1702ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 17039cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 17049cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1705327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 17064437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 17071449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 17085328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1709744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1710fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1711cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 171221175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1713e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 17148016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 171599c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 17168016e29fSHarshad Shirwadkar #endif 1717ac27a0ecSDave Kleikamp }; 1718ac27a0ecSDave Kleikamp 1719e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1720ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1721ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1722ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1723e5a185c2SLukas Czerner {} 1724e5a185c2SLukas Czerner }; 1725e5a185c2SLukas Czerner 1726e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1727ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1728ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1729ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1730e5a185c2SLukas Czerner {} 1731e5a185c2SLukas Czerner }; 1732e5a185c2SLukas Czerner 1733e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1734e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1735e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1736e5a185c2SLukas Czerner {} 1737e5a185c2SLukas Czerner }; 1738e5a185c2SLukas Czerner 1739e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1740ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1741ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1742ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1743e5a185c2SLukas Czerner {} 1744e5a185c2SLukas Czerner }; 1745e5a185c2SLukas Czerner 1746e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1747e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1748e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1749e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1750e5a185c2SLukas Czerner {} 1751e5a185c2SLukas Czerner }; 1752e5a185c2SLukas Czerner 1753e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1754e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1755e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1756e5a185c2SLukas Czerner 1757e5a185c2SLukas Czerner /* 1758e5a185c2SLukas Czerner * Mount option specification 1759e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1760e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1761e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1762e5a185c2SLukas Czerner * separate for now. 1763e5a185c2SLukas Czerner */ 1764e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1765e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1766e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1767e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1768e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1769e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1770e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1771e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1772e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1773e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1774e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1775e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1776e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1777e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1778e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1779e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1780e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1781e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1782e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1783e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1784e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1785e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1786e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1787e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1788e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1789e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1790e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1791e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1792e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1793e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1794e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1795e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1796e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1797e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1798e5a185c2SLukas Czerner ext4_param_data_err), 1799e5a185c2SLukas Czerner fsparam_string_empty 1800e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1801e5a185c2SLukas Czerner fsparam_string_empty 1802e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1803e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1804e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1805e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1806e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1807e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1808e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1809e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1810e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1811e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1812e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1813e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1814e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1815e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1816e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1817e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1818e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1819e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1820e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1821e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1822e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1823e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1824e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1825e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1826e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1827e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1828e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1829e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1830e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1831e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1832e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1833e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1834e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1835e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1836e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1837e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1838e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1839e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1840e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1841e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1842e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1843e5a185c2SLukas Czerner #endif 1844e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1845e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1846e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1847e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1848e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1849e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1850e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1851e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1852e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1853e5a185c2SLukas Czerner Opt_removed), 1854e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1855e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1856e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1857e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1858e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1859e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1860e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1861e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1862e5a185c2SLukas Czerner {} 1863e5a185c2SLukas Czerner }; 1864e5a185c2SLukas Czerner 1865b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1866196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1867196e402aSHarshad Shirwadkar 1868d6006186SEric Biggers static const char deprecated_msg[] = 1869d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1870437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1871b3881f74STheodore Ts'o 187226092bf5STheodore Ts'o #define MOPT_SET 0x0001 187326092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 187426092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 187526092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 187626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 187726092bf5STheodore Ts'o #define MOPT_Q 0 1878ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 187926092bf5STheodore Ts'o #else 188026092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 188126092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 188226092bf5STheodore Ts'o #endif 1883ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1884ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 18858dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1886ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1887ba2e524dSLukas Czerner #define MOPT_2 0x0100 188826092bf5STheodore Ts'o 188926092bf5STheodore Ts'o static const struct mount_opts { 189026092bf5STheodore Ts'o int token; 189126092bf5STheodore Ts'o int mount_opt; 189226092bf5STheodore Ts'o int flags; 189326092bf5STheodore Ts'o } ext4_mount_opts[] = { 189426092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 189526092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 189626092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 189726092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 189826092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 189926092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 19008dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 19018dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 19028dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 19038dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 190426092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 190526092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 19068dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 19078dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19088dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 190959d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1910327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1911327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1912c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1913c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 19148dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 19151e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 191626092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 19178dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 19181e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 19198dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1920ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 192126092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 192226092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 192326092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 192426092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 192526092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1926ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1927ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1928ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1929ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1930ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 193126092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 193226092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 193326092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 193426092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 193526092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 193626092bf5STheodore Ts'o #else 193726092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 193826092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 193926092bf5STheodore Ts'o #endif 194026092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 194126092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 194226092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 194326092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 194426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 194526092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 194626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 194749da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 194849da9392SJan Kara MOPT_SET | MOPT_Q}, 194926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 195049da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 195149da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1952ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1953ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1954ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1955cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 195621175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 19573d392b26STheodore Ts'o MOPT_SET}, 195899c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 19590f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 19600f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 19618016e29fSHarshad Shirwadkar #endif 196226092bf5STheodore Ts'o {Opt_err, 0, 0} 196326092bf5STheodore Ts'o }; 196426092bf5STheodore Ts'o 1965c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1966c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1967c83ad55eSGabriel Krisman Bertazi __u16 magic; 1968c83ad55eSGabriel Krisman Bertazi char *name; 1969c83ad55eSGabriel Krisman Bertazi char *version; 1970c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 1971c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 1972c83ad55eSGabriel Krisman Bertazi }; 1973c83ad55eSGabriel Krisman Bertazi 1974c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 1975c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 1976c83ad55eSGabriel Krisman Bertazi __u16 *flags) 1977c83ad55eSGabriel Krisman Bertazi { 1978c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1979c83ad55eSGabriel Krisman Bertazi int i; 1980c83ad55eSGabriel Krisman Bertazi 1981c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1982c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1983c83ad55eSGabriel Krisman Bertazi break; 1984c83ad55eSGabriel Krisman Bertazi 1985c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 1986c83ad55eSGabriel Krisman Bertazi return -EINVAL; 1987c83ad55eSGabriel Krisman Bertazi 1988c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 1989c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 1990c83ad55eSGabriel Krisman Bertazi 1991c83ad55eSGabriel Krisman Bertazi return 0; 1992c83ad55eSGabriel Krisman Bertazi } 1993c83ad55eSGabriel Krisman Bertazi #endif 1994c83ad55eSGabriel Krisman Bertazi 19956e47a3ccSLukas Czerner static int ext4_set_test_dummy_encryption(struct super_block *sb, char *arg) 1996ed318a6cSEric Biggers { 1997ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 1998ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 1999ed318a6cSEric Biggers int err; 2000ed318a6cSEric Biggers 20016e47a3ccSLukas Czerner err = fscrypt_set_test_dummy_encryption(sb, arg, 2002ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2003ed318a6cSEric Biggers if (err) { 2004ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 20056e47a3ccSLukas Czerner "Error while setting test dummy encryption [%d]", err); 20066e47a3ccSLukas Czerner return err; 2007ed318a6cSEric Biggers } 2008ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2009ed318a6cSEric Biggers #endif 20106e47a3ccSLukas Czerner return 0; 2011ed318a6cSEric Biggers } 2012ed318a6cSEric Biggers 20136e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 20146e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 20156e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 20166e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 20176e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 20186e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 20196e47a3ccSLukas Czerner #define EXT4_SPEC_DUMMY_ENCRYPTION (1 << 6) 20206e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 20216e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 20226e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 20236e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 20246e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 20256e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 20266e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 20276e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 20286e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 20296e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 20306e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 20317edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 20326e47a3ccSLukas Czerner 2033461c3af0SLukas Czerner struct ext4_fs_context { 2034e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 20356e47a3ccSLukas Czerner char *test_dummy_enc_arg; 2036e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 2037196e402aSHarshad Shirwadkar int mb_optimize_scan; 20386e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 20396e47a3ccSLukas Czerner int s_fc_debug_max_replay; 20406e47a3ccSLukas Czerner #endif 20416e47a3ccSLukas Czerner unsigned short qname_spec; 20426e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 20436e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 20446e47a3ccSLukas Czerner unsigned long journal_devnum; 20456e47a3ccSLukas Czerner unsigned long s_commit_interval; 20466e47a3ccSLukas Czerner unsigned long s_stripe; 20476e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 20486e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 20496e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 20506e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 20516e47a3ccSLukas Czerner unsigned int journal_ioprio; 20526e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 20536e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 20546e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 20556e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 20566e47a3ccSLukas Czerner unsigned int vals_s_mount_flags; 20576e47a3ccSLukas Czerner unsigned int mask_s_mount_flags; 2058b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 20596e47a3ccSLukas Czerner unsigned int spec; 20606e47a3ccSLukas Czerner u32 s_max_batch_time; 20616e47a3ccSLukas Czerner u32 s_min_batch_time; 20626e47a3ccSLukas Czerner kuid_t s_resuid; 20636e47a3ccSLukas Czerner kgid_t s_resgid; 20647edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 2065b237e304SHarshad Shirwadkar }; 2066b237e304SHarshad Shirwadkar 2067cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 2068cebe85d5SLukas Czerner { 2069cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2070cebe85d5SLukas Czerner int i; 2071cebe85d5SLukas Czerner 2072cebe85d5SLukas Czerner if (!ctx) 2073cebe85d5SLukas Czerner return; 2074cebe85d5SLukas Czerner 2075cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 2076cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 2077cebe85d5SLukas Czerner 2078cebe85d5SLukas Czerner kfree(ctx->test_dummy_enc_arg); 2079cebe85d5SLukas Czerner kfree(ctx); 2080cebe85d5SLukas Czerner } 2081cebe85d5SLukas Czerner 2082cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 2083cebe85d5SLukas Czerner { 2084cebe85d5SLukas Czerner struct xfs_fs_context *ctx; 2085cebe85d5SLukas Czerner 2086cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 2087cebe85d5SLukas Czerner if (!ctx) 2088cebe85d5SLukas Czerner return -ENOMEM; 2089cebe85d5SLukas Czerner 2090cebe85d5SLukas Czerner fc->fs_private = ctx; 2091cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 2092cebe85d5SLukas Czerner 2093cebe85d5SLukas Czerner return 0; 2094cebe85d5SLukas Czerner } 2095cebe85d5SLukas Czerner 2096e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2097e6e268cbSLukas Czerner /* 2098e6e268cbSLukas Czerner * Note the name of the specified quota file. 2099e6e268cbSLukas Czerner */ 2100e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2101e6e268cbSLukas Czerner struct fs_parameter *param) 2102e6e268cbSLukas Czerner { 2103e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2104e6e268cbSLukas Czerner char *qname; 2105e6e268cbSLukas Czerner 2106e6e268cbSLukas Czerner if (param->size < 1) { 2107e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2108e6e268cbSLukas Czerner return -EINVAL; 2109e6e268cbSLukas Czerner } 2110e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2111e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2112e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2113e6e268cbSLukas Czerner return -EINVAL; 2114e6e268cbSLukas Czerner } 2115e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2116e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2117e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2118e6e268cbSLukas Czerner "%s quota file already specified", 2119e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2120e6e268cbSLukas Czerner return -EINVAL; 2121e6e268cbSLukas Czerner } 2122e6e268cbSLukas Czerner return 0; 2123e6e268cbSLukas Czerner } 2124e6e268cbSLukas Czerner 2125e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2126e6e268cbSLukas Czerner if (!qname) { 2127e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2128e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2129e6e268cbSLukas Czerner return -ENOMEM; 2130e6e268cbSLukas Czerner } 2131e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2132e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 21336e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2134e6e268cbSLukas Czerner return 0; 2135e6e268cbSLukas Czerner } 2136e6e268cbSLukas Czerner 2137e6e268cbSLukas Czerner /* 2138e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2139e6e268cbSLukas Czerner */ 2140e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2141e6e268cbSLukas Czerner { 2142e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2143e6e268cbSLukas Czerner 2144e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2145e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2146e6e268cbSLukas Czerner 2147e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2148e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 21496e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2150e6e268cbSLukas Czerner return 0; 2151e6e268cbSLukas Czerner } 2152e6e268cbSLukas Czerner #endif 2153e6e268cbSLukas Czerner 21546e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 21554c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 21564c246728SLukas Czerner unsigned long flag) \ 21576e47a3ccSLukas Czerner { \ 21586e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21596e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 21606e47a3ccSLukas Czerner } \ 21614c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 21624c246728SLukas Czerner unsigned long flag) \ 21636e47a3ccSLukas Czerner { \ 21646e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21656e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 21666e47a3ccSLukas Czerner } \ 21674c246728SLukas Czerner static inline unsigned long \ 21684c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 21696e47a3ccSLukas Czerner { \ 21704c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 21716e47a3ccSLukas Czerner } \ 21726e47a3ccSLukas Czerner 21736e47a3ccSLukas Czerner EXT4_SET_CTX(flags); 21746e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 21756e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 21766e47a3ccSLukas Czerner EXT4_SET_CTX(mount_flags); 21776e47a3ccSLukas Czerner 217802f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 217926092bf5STheodore Ts'o { 2180461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2181461c3af0SLukas Czerner struct fs_parse_result result; 218226092bf5STheodore Ts'o const struct mount_opts *m; 2183461c3af0SLukas Czerner int is_remount; 218408cefc7aSEric W. Biederman kuid_t uid; 218508cefc7aSEric W. Biederman kgid_t gid; 2186461c3af0SLukas Czerner int token; 2187461c3af0SLukas Czerner 2188461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2189461c3af0SLukas Czerner if (token < 0) 2190461c3af0SLukas Czerner return token; 2191461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 219226092bf5STheodore Ts'o 2193ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2194ba2e524dSLukas Czerner if (token == m->token) 2195ba2e524dSLukas Czerner break; 2196ba2e524dSLukas Czerner 2197ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2198ba2e524dSLukas Czerner 2199ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2200ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2201ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2202ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2203ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2204ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2205ba2e524dSLukas Czerner } else 2206ba2e524dSLukas Czerner return -EINVAL; 2207ba2e524dSLukas Czerner } 2208ba2e524dSLukas Czerner 2209ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2210ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2211ba2e524dSLukas Czerner param->key); 2212ba2e524dSLukas Czerner return 0; 2213ba2e524dSLukas Czerner } 2214ba2e524dSLukas Czerner 2215ba2e524dSLukas Czerner switch (token) { 221657f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2217ba2e524dSLukas Czerner case Opt_usrjquota: 2218461c3af0SLukas Czerner if (!*param->string) 2219e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2220461c3af0SLukas Czerner else 2221e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2222ba2e524dSLukas Czerner case Opt_grpjquota: 2223461c3af0SLukas Czerner if (!*param->string) 2224e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2225461c3af0SLukas Czerner else 2226e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 222757f73c2cSTheodore Ts'o #endif 2228f7048605STheodore Ts'o case Opt_noacl: 2229f7048605STheodore Ts'o case Opt_nouser_xattr: 2230da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "3.5"); 2231f7048605STheodore Ts'o break; 223226092bf5STheodore Ts'o case Opt_sb: 22337edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 22347edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 22357edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 22367edfd85bSLukas Czerner } else { 22377edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 22387edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 22397edfd85bSLukas Czerner } 224002f960f8SLukas Czerner return 0; 224126092bf5STheodore Ts'o case Opt_removed: 2242da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2243461c3af0SLukas Czerner param->key); 224402f960f8SLukas Czerner return 0; 224526092bf5STheodore Ts'o case Opt_abort: 22466e47a3ccSLukas Czerner ctx_set_mount_flags(ctx, EXT4_MF_FS_ABORTED); 224702f960f8SLukas Czerner return 0; 224826092bf5STheodore Ts'o case Opt_i_version: 2249960e0ab6SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "5.20"); 2250960e0ab6SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Use iversion instead\n"); 22516e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_I_VERSION); 225202f960f8SLukas Czerner return 0; 22534f74d15fSEric Biggers case Opt_inlinecrypt: 22544f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 22556e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 22564f74d15fSEric Biggers #else 2257da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 22584f74d15fSEric Biggers #endif 225902f960f8SLukas Czerner return 0; 2260461c3af0SLukas Czerner case Opt_errors: 22616e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2262ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2263ba2e524dSLukas Czerner return 0; 2264ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2265ba2e524dSLukas Czerner case Opt_jqfmt: 2266ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2267ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2268ba2e524dSLukas Czerner return 0; 2269ba2e524dSLukas Czerner #endif 2270ba2e524dSLukas Czerner case Opt_data: 2271ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2272ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2273ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2274ba2e524dSLukas Czerner return 0; 2275ba2e524dSLukas Czerner case Opt_commit: 2276461c3af0SLukas Czerner if (result.uint_32 == 0) 22776e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2278461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2279da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22809ba55543Szhangyi (F) "Invalid commit interval %d, " 22819ba55543Szhangyi (F) "must be smaller than %d", 2282461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2283da812f61SLukas Czerner return -EINVAL; 22849ba55543Szhangyi (F) } 22856e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 22866e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2287ba2e524dSLukas Czerner return 0; 2288ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 22896e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2290da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2291461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2292da812f61SLukas Czerner return -EINVAL; 22939803387cSTheodore Ts'o } 22946e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 22956e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2296ba2e524dSLukas Czerner return 0; 2297ba2e524dSLukas Czerner case Opt_max_batch_time: 22986e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 22996e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2300ba2e524dSLukas Czerner return 0; 2301ba2e524dSLukas Czerner case Opt_min_batch_time: 23026e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 23036e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2304ba2e524dSLukas Czerner return 0; 2305ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2306461c3af0SLukas Czerner if (result.uint_32 && 2307461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2308461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2309da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2310e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2311e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2312da812f61SLukas Czerner return -EINVAL; 231326092bf5STheodore Ts'o } 23146e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 23156e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2316ba2e524dSLukas Czerner return 0; 2317ba2e524dSLukas Czerner case Opt_init_itable: 23186e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 23196e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2320461c3af0SLukas Czerner if (param->type == fs_value_is_string) 23216e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 23226e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2323ba2e524dSLukas Czerner return 0; 2324ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 23256e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 23266e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2327ba2e524dSLukas Czerner return 0; 23288016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2329ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 23306e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 23316e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2332ba2e524dSLukas Czerner return 0; 23338016e29fSHarshad Shirwadkar #endif 2334ba2e524dSLukas Czerner case Opt_stripe: 23356e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 23366e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2337ba2e524dSLukas Czerner return 0; 2338ba2e524dSLukas Czerner case Opt_resuid: 2339461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 23400efb3b23SJan Kara if (!uid_valid(uid)) { 2341da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2342461c3af0SLukas Czerner result.uint_32); 2343da812f61SLukas Czerner return -EINVAL; 23440efb3b23SJan Kara } 23456e47a3ccSLukas Czerner ctx->s_resuid = uid; 23466e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2347ba2e524dSLukas Czerner return 0; 2348ba2e524dSLukas Czerner case Opt_resgid: 2349461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 23500efb3b23SJan Kara if (!gid_valid(gid)) { 2351da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2352461c3af0SLukas Czerner result.uint_32); 2353da812f61SLukas Czerner return -EINVAL; 23540efb3b23SJan Kara } 23556e47a3ccSLukas Czerner ctx->s_resgid = gid; 23566e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2357ba2e524dSLukas Czerner return 0; 2358ba2e524dSLukas Czerner case Opt_journal_dev: 23590efb3b23SJan Kara if (is_remount) { 2360da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 23610efb3b23SJan Kara "Cannot specify journal on remount"); 2362da812f61SLukas Czerner return -EINVAL; 23630efb3b23SJan Kara } 2364461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 23656e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2366ba2e524dSLukas Czerner return 0; 2367ba2e524dSLukas Czerner case Opt_journal_path: 2368ba2e524dSLukas Czerner { 2369ad4eec61SEric Sandeen struct inode *journal_inode; 2370ad4eec61SEric Sandeen struct path path; 2371ad4eec61SEric Sandeen int error; 2372ad4eec61SEric Sandeen 2373ad4eec61SEric Sandeen if (is_remount) { 2374da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2375ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2376da812f61SLukas Czerner return -EINVAL; 2377ad4eec61SEric Sandeen } 2378ad4eec61SEric Sandeen 2379461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2380ad4eec61SEric Sandeen if (error) { 2381da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2382461c3af0SLukas Czerner "journal device path"); 2383da812f61SLukas Czerner return -EINVAL; 2384ad4eec61SEric Sandeen } 2385ad4eec61SEric Sandeen 23862b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2387461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 23886e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2389ad4eec61SEric Sandeen path_put(&path); 2390ba2e524dSLukas Czerner return 0; 2391ba2e524dSLukas Czerner } 2392ba2e524dSLukas Czerner case Opt_journal_ioprio: 2393461c3af0SLukas Czerner if (result.uint_32 > 7) { 2394da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 23950efb3b23SJan Kara " (must be 0-7)"); 2396da812f61SLukas Czerner return -EINVAL; 23970efb3b23SJan Kara } 2398461c3af0SLukas Czerner ctx->journal_ioprio = 2399461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 24006e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2401ba2e524dSLukas Czerner return 0; 2402ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 24036e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 24046e47a3ccSLukas Czerner if (param->type == fs_value_is_flag) { 24056e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 24066e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = NULL; 240702f960f8SLukas Czerner return 0; 24086e47a3ccSLukas Czerner } 24096e47a3ccSLukas Czerner if (*param->string && 24106e47a3ccSLukas Czerner !(!strcmp(param->string, "v1") || 24116e47a3ccSLukas Czerner !strcmp(param->string, "v2"))) { 24126e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 24136e47a3ccSLukas Czerner "Value of option \"%s\" is unrecognized", 24146e47a3ccSLukas Czerner param->key); 2415da812f61SLukas Czerner return -EINVAL; 241626092bf5STheodore Ts'o } 24176e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_DUMMY_ENCRYPTION; 24186e47a3ccSLukas Czerner ctx->test_dummy_enc_arg = kmemdup_nul(param->string, param->size, 24196e47a3ccSLukas Czerner GFP_KERNEL); 24206e47a3ccSLukas Czerner #else 24216e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 24226e47a3ccSLukas Czerner "Test dummy encryption mount option ignored"); 24236e47a3ccSLukas Czerner #endif 2424ba2e524dSLukas Czerner return 0; 2425ba2e524dSLukas Czerner case Opt_dax: 2426ba2e524dSLukas Czerner case Opt_dax_type: 2427ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2428ba2e524dSLukas Czerner { 2429ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2430ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2431ba2e524dSLukas Czerner 2432ba2e524dSLukas Czerner switch (type) { 24339cb20f94SIra Weiny case Opt_dax: 24349cb20f94SIra Weiny case Opt_dax_always: 2435ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24366e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24379cb20f94SIra Weiny break; 24389cb20f94SIra Weiny case Opt_dax_never: 2439ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24406e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24419cb20f94SIra Weiny break; 24429cb20f94SIra Weiny case Opt_dax_inode: 24436e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 24446e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 24459cb20f94SIra Weiny /* Strictly for printing options */ 2446ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 24479cb20f94SIra Weiny break; 24489cb20f94SIra Weiny } 2449ba2e524dSLukas Czerner return 0; 2450ba2e524dSLukas Czerner } 2451ef83b6e8SDan Williams #else 2452da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2453da812f61SLukas Czerner return -EINVAL; 2454923ae0ffSRoss Zwisler #endif 2455ba2e524dSLukas Czerner case Opt_data_err: 2456ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 24576e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2458ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 24596e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2460ba2e524dSLukas Czerner return 0; 2461ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 2462461c3af0SLukas Czerner if (result.int_32 != 0 && result.int_32 != 1) { 2463da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2464196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2465da812f61SLukas Czerner return -EINVAL; 2466196e402aSHarshad Shirwadkar } 2467461c3af0SLukas Czerner ctx->mb_optimize_scan = result.int_32; 2468ba2e524dSLukas Czerner return 0; 2469ba2e524dSLukas Czerner } 2470ba2e524dSLukas Czerner 2471ba2e524dSLukas Czerner /* 2472ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2473ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2474ba2e524dSLukas Czerner */ 2475ba2e524dSLukas Czerner if (m->token == Opt_err) { 2476ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2477ba2e524dSLukas Czerner param->key); 2478ba2e524dSLukas Czerner WARN_ON(1); 2479ba2e524dSLukas Czerner return -EINVAL; 2480ba2e524dSLukas Czerner } 2481ba2e524dSLukas Czerner 2482ba2e524dSLukas Czerner else { 2483461c3af0SLukas Czerner unsigned int set = 0; 2484461c3af0SLukas Czerner 2485461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2486461c3af0SLukas Czerner result.uint_32 > 0) 2487461c3af0SLukas Czerner set = 1; 2488461c3af0SLukas Czerner 248926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2490461c3af0SLukas Czerner set = !set; 249126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2492da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2493461c3af0SLukas Czerner "buggy handling of option %s", 2494461c3af0SLukas Czerner param->key); 249526092bf5STheodore Ts'o WARN_ON(1); 2496da812f61SLukas Czerner return -EINVAL; 249726092bf5STheodore Ts'o } 2498995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2499461c3af0SLukas Czerner if (set != 0) 25006e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2501995a3ed6SHarshad Shirwadkar else 25026e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2503995a3ed6SHarshad Shirwadkar } else { 2504461c3af0SLukas Czerner if (set != 0) 25056e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 250626092bf5STheodore Ts'o else 25076e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 250826092bf5STheodore Ts'o } 2509995a3ed6SHarshad Shirwadkar } 2510ba2e524dSLukas Czerner 251102f960f8SLukas Czerner return 0; 251226092bf5STheodore Ts'o } 251326092bf5STheodore Ts'o 25147edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2515ac27a0ecSDave Kleikamp { 2516461c3af0SLukas Czerner struct fs_parameter param; 2517461c3af0SLukas Czerner int ret; 2518461c3af0SLukas Czerner char *key; 2519ac27a0ecSDave Kleikamp 2520ac27a0ecSDave Kleikamp if (!options) 25217edfd85bSLukas Czerner return 0; 2522461c3af0SLukas Czerner 2523461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2524461c3af0SLukas Czerner if (*key) { 2525461c3af0SLukas Czerner size_t v_len = 0; 2526461c3af0SLukas Czerner char *value = strchr(key, '='); 2527461c3af0SLukas Czerner 2528461c3af0SLukas Czerner param.type = fs_value_is_flag; 2529461c3af0SLukas Czerner param.string = NULL; 2530461c3af0SLukas Czerner 2531461c3af0SLukas Czerner if (value) { 2532461c3af0SLukas Czerner if (value == key) 2533ac27a0ecSDave Kleikamp continue; 2534461c3af0SLukas Czerner 2535461c3af0SLukas Czerner *value++ = 0; 2536461c3af0SLukas Czerner v_len = strlen(value); 2537461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2538461c3af0SLukas Czerner GFP_KERNEL); 2539461c3af0SLukas Czerner if (!param.string) 25407edfd85bSLukas Czerner return -ENOMEM; 2541461c3af0SLukas Czerner param.type = fs_value_is_string; 2542461c3af0SLukas Czerner } 2543461c3af0SLukas Czerner 2544461c3af0SLukas Czerner param.key = key; 2545461c3af0SLukas Czerner param.size = v_len; 2546461c3af0SLukas Czerner 254702f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2548461c3af0SLukas Czerner if (param.string) 2549461c3af0SLukas Czerner kfree(param.string); 2550461c3af0SLukas Czerner if (ret < 0) 25517edfd85bSLukas Czerner return ret; 2552ac27a0ecSDave Kleikamp } 2553461c3af0SLukas Czerner } 2554461c3af0SLukas Czerner 25557edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2556da812f61SLukas Czerner if (ret < 0) 25577edfd85bSLukas Czerner return ret; 25587edfd85bSLukas Czerner 25597edfd85bSLukas Czerner return 0; 25607edfd85bSLukas Czerner } 25617edfd85bSLukas Czerner 25627edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 25637edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 25647edfd85bSLukas Czerner { 25657edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 25667edfd85bSLukas Czerner char *s_mount_opts = NULL; 25677edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 25687edfd85bSLukas Czerner struct fs_context *fc = NULL; 25697edfd85bSLukas Czerner int ret = -ENOMEM; 25707edfd85bSLukas Czerner 25717edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2572da812f61SLukas Czerner return 0; 2573da812f61SLukas Czerner 25747edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 25757edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 25767edfd85bSLukas Czerner GFP_KERNEL); 25777edfd85bSLukas Czerner if (!s_mount_opts) 25787edfd85bSLukas Czerner return ret; 2579e6e268cbSLukas Czerner 25807edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 25817edfd85bSLukas Czerner if (!fc) 25827edfd85bSLukas Czerner goto out_free; 2583e6e268cbSLukas Czerner 25847edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 25857edfd85bSLukas Czerner if (!s_ctx) 25867edfd85bSLukas Czerner goto out_free; 25877edfd85bSLukas Czerner 25887edfd85bSLukas Czerner fc->fs_private = s_ctx; 25897edfd85bSLukas Czerner fc->s_fs_info = sbi; 25907edfd85bSLukas Czerner 25917edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 25927edfd85bSLukas Czerner if (ret < 0) 25937edfd85bSLukas Czerner goto parse_failed; 25947edfd85bSLukas Czerner 25957edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 25967edfd85bSLukas Czerner if (ret < 0) { 25977edfd85bSLukas Czerner parse_failed: 25987edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 25997edfd85bSLukas Czerner "failed to parse options in superblock: %s", 26007edfd85bSLukas Czerner s_mount_opts); 26017edfd85bSLukas Czerner ret = 0; 26027edfd85bSLukas Czerner goto out_free; 26037edfd85bSLukas Czerner } 26047edfd85bSLukas Czerner 26057edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 26067edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 26077edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 26087edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 26097edfd85bSLukas Czerner 26107edfd85bSLukas Czerner ret = ext4_apply_options(fc, sb); 26117edfd85bSLukas Czerner 26127edfd85bSLukas Czerner out_free: 26137edfd85bSLukas Czerner kfree(s_ctx); 26147edfd85bSLukas Czerner kfree(fc); 26157edfd85bSLukas Czerner kfree(s_mount_opts); 26167edfd85bSLukas Czerner return ret; 26174c94bff9SLukas Czerner } 26184c94bff9SLukas Czerner 2619e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2620e6e268cbSLukas Czerner struct super_block *sb) 2621e6e268cbSLukas Czerner { 2622e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 26236e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2624e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2625e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2626e6e268cbSLukas Czerner char *qname; 2627e6e268cbSLukas Czerner int i; 2628e6e268cbSLukas Czerner 26296e47a3ccSLukas Czerner if (quota_feature) 26306e47a3ccSLukas Czerner return; 26316e47a3ccSLukas Czerner 26326e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2633e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2634e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2635e6e268cbSLukas Czerner continue; 26366e47a3ccSLukas Czerner 2637e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 2638e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 2639*13b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 2640*13b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 2641*13b215a9SLukas Czerner if (qname) 2642*13b215a9SLukas Czerner kfree_rcu(qname); 2643e6e268cbSLukas Czerner set_opt(sb, QUOTA); 2644e6e268cbSLukas Czerner } 26456e47a3ccSLukas Czerner } 26466e47a3ccSLukas Czerner 26476e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 26486e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2649e6e268cbSLukas Czerner #endif 2650e6e268cbSLukas Czerner } 2651e6e268cbSLukas Czerner 2652e6e268cbSLukas Czerner /* 2653e6e268cbSLukas Czerner * Check quota settings consistency. 2654e6e268cbSLukas Czerner */ 2655e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2656e6e268cbSLukas Czerner struct super_block *sb) 2657e6e268cbSLukas Czerner { 2658e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2659e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2660e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2661e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2662e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 26636e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 26646e47a3ccSLukas Czerner int quota_flags, i; 2665e6e268cbSLukas Czerner 26666e47a3ccSLukas Czerner /* 26676e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 26686e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 26696e47a3ccSLukas Czerner * to support legacy quotas in quota files. 26706e47a3ccSLukas Czerner */ 26716e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 26726e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 26736e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 26746e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 26756e47a3ccSLukas Czerner return -EINVAL; 26766e47a3ccSLukas Czerner } 26776e47a3ccSLukas Czerner 26786e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 26796e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 26806e47a3ccSLukas Czerner if (quota_loaded && 26816e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 26826e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 26836e47a3ccSLukas Czerner goto err_quota_change; 26846e47a3ccSLukas Czerner 26856e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2686e6e268cbSLukas Czerner 2687e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2688e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2689e6e268cbSLukas Czerner continue; 2690e6e268cbSLukas Czerner 26916e47a3ccSLukas Czerner if (quota_loaded && 26926e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2693e6e268cbSLukas Czerner goto err_jquota_change; 2694e6e268cbSLukas Czerner 2695e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 2696*13b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2697e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2698e6e268cbSLukas Czerner goto err_jquota_specified; 2699e6e268cbSLukas Czerner } 27006e47a3ccSLukas Czerner 27016e47a3ccSLukas Czerner if (quota_feature) { 27026e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 27036e47a3ccSLukas Czerner "Journaled quota options ignored when " 27046e47a3ccSLukas Czerner "QUOTA feature is enabled"); 27056e47a3ccSLukas Czerner return 0; 27066e47a3ccSLukas Czerner } 2707e6e268cbSLukas Czerner } 2708e6e268cbSLukas Czerner 27096e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2710e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 27116e47a3ccSLukas Czerner goto err_jquota_change; 2712e6e268cbSLukas Czerner if (quota_feature) { 2713e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2714e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2715e6e268cbSLukas Czerner return 0; 2716e6e268cbSLukas Czerner } 2717e6e268cbSLukas Czerner } 27186e47a3ccSLukas Czerner 27196e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 27206e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 27216e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 27226e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 27236e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 27246e47a3ccSLukas Czerner 27256e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 27266e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 27276e47a3ccSLukas Czerner 27286e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 27296e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 27306e47a3ccSLukas Czerner 27316e47a3ccSLukas Czerner if (usr_qf_name) { 27326e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 27336e47a3ccSLukas Czerner usrquota = false; 27346e47a3ccSLukas Czerner } 27356e47a3ccSLukas Czerner if (grp_qf_name) { 27366e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 27376e47a3ccSLukas Czerner grpquota = false; 27386e47a3ccSLukas Czerner } 27396e47a3ccSLukas Czerner 27406e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 27416e47a3ccSLukas Czerner if (usrquota || grpquota) { 27426e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 27436e47a3ccSLukas Czerner "format mixing"); 27446e47a3ccSLukas Czerner return -EINVAL; 27456e47a3ccSLukas Czerner } 27466e47a3ccSLukas Czerner 27476e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 27486e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 27496e47a3ccSLukas Czerner "not specified"); 27506e47a3ccSLukas Czerner return -EINVAL; 27516e47a3ccSLukas Czerner } 27526e47a3ccSLukas Czerner } 27536e47a3ccSLukas Czerner 2754e6e268cbSLukas Czerner return 0; 2755e6e268cbSLukas Czerner 2756e6e268cbSLukas Czerner err_quota_change: 2757e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2758e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2759e6e268cbSLukas Czerner return -EINVAL; 2760e6e268cbSLukas Czerner err_jquota_change: 2761e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2762e6e268cbSLukas Czerner "options when quota turned on"); 2763e6e268cbSLukas Czerner return -EINVAL; 2764e6e268cbSLukas Czerner err_jquota_specified: 2765e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2766e6e268cbSLukas Czerner QTYPE2NAME(i)); 2767e6e268cbSLukas Czerner return -EINVAL; 2768e6e268cbSLukas Czerner #else 2769e6e268cbSLukas Czerner return 0; 2770e6e268cbSLukas Czerner #endif 2771e6e268cbSLukas Czerner } 2772e6e268cbSLukas Czerner 2773b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2774b6bd2435SLukas Czerner struct super_block *sb) 2775b6bd2435SLukas Czerner { 2776b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27776e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27786e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 2779b6bd2435SLukas Czerner 2780b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2781b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2782b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2783b6bd2435SLukas Czerner return -EINVAL; 2784b6bd2435SLukas Czerner } 2785b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2786b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2787b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2788b6bd2435SLukas Czerner return -EINVAL; 2789b6bd2435SLukas Czerner } 2790b6bd2435SLukas Czerner 27916e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27926e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27936e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 27946e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 27956e47a3ccSLukas Czerner ctx->s_want_extra_isize); 27966e47a3ccSLukas Czerner return -EINVAL; 27976e47a3ccSLukas Czerner } 27986e47a3ccSLukas Czerner 27996e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 28006e47a3ccSLukas Czerner int blocksize = 28016e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 28026e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 28036e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 28046e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 28056e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 28066e47a3ccSLukas Czerner } 28076e47a3ccSLukas Czerner 28086e47a3ccSLukas Czerner #ifdef CONFIG_FS_ENCRYPTION 28096e47a3ccSLukas Czerner /* 28106e47a3ccSLukas Czerner * This mount option is just for testing, and it's not worthwhile to 28116e47a3ccSLukas Czerner * implement the extra complexity (e.g. RCU protection) that would be 28126e47a3ccSLukas Czerner * needed to allow it to be set or changed during remount. We do allow 28136e47a3ccSLukas Czerner * it to be specified during remount, but only if there is no change. 28146e47a3ccSLukas Czerner */ 28156e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) && 28166e47a3ccSLukas Czerner is_remount && !sbi->s_dummy_enc_policy.policy) { 28176e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 28186e47a3ccSLukas Czerner "Can't set test_dummy_encryption on remount"); 28196e47a3ccSLukas Czerner return -1; 28206e47a3ccSLukas Czerner } 28216e47a3ccSLukas Czerner #endif 28226e47a3ccSLukas Czerner 28236e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 28246e47a3ccSLukas Czerner if (!sbi->s_journal) { 28256e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 28266e47a3ccSLukas Czerner "Remounting file system with no journal " 28276e47a3ccSLukas Czerner "so ignoring journalled data option"); 28286e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 28294c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 28304c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 28316e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 28326e47a3ccSLukas Czerner "on remount"); 28336e47a3ccSLukas Czerner return -EINVAL; 28346e47a3ccSLukas Czerner } 28356e47a3ccSLukas Czerner } 28366e47a3ccSLukas Czerner 28376e47a3ccSLukas Czerner if (is_remount) { 28386e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28396e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 28406e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 28416e47a3ccSLukas Czerner "both data=journal and dax"); 28426e47a3ccSLukas Czerner return -EINVAL; 28436e47a3ccSLukas Czerner } 28446e47a3ccSLukas Czerner 28456e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28466e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28476e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 28486e47a3ccSLukas Czerner fail_dax_change_remount: 28496e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 28506e47a3ccSLukas Czerner "dax mount option while remounting"); 28516e47a3ccSLukas Czerner return -EINVAL; 28526e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 28536e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28546e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 28556e47a3ccSLukas Czerner goto fail_dax_change_remount; 28566e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 28576e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28586e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28596e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 28606e47a3ccSLukas Czerner goto fail_dax_change_remount; 28616e47a3ccSLukas Czerner } 28626e47a3ccSLukas Czerner } 28636e47a3ccSLukas Czerner 2864b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2865b6bd2435SLukas Czerner } 2866b6bd2435SLukas Czerner 28676e47a3ccSLukas Czerner static int ext4_apply_options(struct fs_context *fc, struct super_block *sb) 28686e47a3ccSLukas Czerner { 28696e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28706e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28716e47a3ccSLukas Czerner int ret = 0; 28726e47a3ccSLukas Czerner 28736e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 28746e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 28756e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 28766e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 28776e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 28786e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 28796e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28806e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28816e47a3ccSLukas Czerner 2882960e0ab6SLukas Czerner /* 2883960e0ab6SLukas Czerner * i_version differs from common mount option iversion so we have 2884960e0ab6SLukas Czerner * to let vfs know that it was set, otherwise it would get cleared 2885960e0ab6SLukas Czerner * on remount 2886960e0ab6SLukas Czerner */ 2887960e0ab6SLukas Czerner if (ctx->mask_s_flags & SB_I_VERSION) 2888960e0ab6SLukas Czerner fc->sb_flags |= SB_I_VERSION; 2889960e0ab6SLukas Czerner 28906e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 28916e47a3ccSLukas Czerner APPLY(s_commit_interval); 28926e47a3ccSLukas Czerner APPLY(s_stripe); 28936e47a3ccSLukas Czerner APPLY(s_max_batch_time); 28946e47a3ccSLukas Czerner APPLY(s_min_batch_time); 28956e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 28966e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 28976e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 28986e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 28996e47a3ccSLukas Czerner APPLY(s_resgid); 29006e47a3ccSLukas Czerner APPLY(s_resuid); 29016e47a3ccSLukas Czerner 29026e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 29036e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 29046e47a3ccSLukas Czerner #endif 29056e47a3ccSLukas Czerner 29066e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 29076e47a3ccSLukas Czerner 29086e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_DUMMY_ENCRYPTION) 29096e47a3ccSLukas Czerner ret = ext4_set_test_dummy_encryption(sb, ctx->test_dummy_enc_arg); 29106e47a3ccSLukas Czerner 29116e47a3ccSLukas Czerner return ret; 29126e47a3ccSLukas Czerner } 29136e47a3ccSLukas Czerner 29146e47a3ccSLukas Czerner 2915da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 29164c94bff9SLukas Czerner { 2917ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 29186e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 29194c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 29206e47a3ccSLukas Czerner 29216e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 29226e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 29236e47a3ccSLukas Czerner 292433458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 29256e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 29266e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2927ac27a0ecSDave Kleikamp 29286e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 29296e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2930ac27a0ecSDave Kleikamp 29316e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 29326e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2933da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2934b31e1552SEric Sandeen "format mixing"); 2935da812f61SLukas Czerner return -EINVAL; 2936ac27a0ecSDave Kleikamp } 2937ac27a0ecSDave Kleikamp } 2938ac27a0ecSDave Kleikamp #endif 29396e47a3ccSLukas Czerner return 1; 2940ac27a0ecSDave Kleikamp } 2941ac27a0ecSDave Kleikamp 29422adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 29432adf6da8STheodore Ts'o struct super_block *sb) 29442adf6da8STheodore Ts'o { 29452adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 29462adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 294733458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 29482adf6da8STheodore Ts'o 29492adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 29502adf6da8STheodore Ts'o char *fmtname = ""; 29512adf6da8STheodore Ts'o 29522adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 29532adf6da8STheodore Ts'o case QFMT_VFS_OLD: 29542adf6da8STheodore Ts'o fmtname = "vfsold"; 29552adf6da8STheodore Ts'o break; 29562adf6da8STheodore Ts'o case QFMT_VFS_V0: 29572adf6da8STheodore Ts'o fmtname = "vfsv0"; 29582adf6da8STheodore Ts'o break; 29592adf6da8STheodore Ts'o case QFMT_VFS_V1: 29602adf6da8STheodore Ts'o fmtname = "vfsv1"; 29612adf6da8STheodore Ts'o break; 29622adf6da8STheodore Ts'o } 29632adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 29642adf6da8STheodore Ts'o } 29652adf6da8STheodore Ts'o 296633458eabSTheodore Ts'o rcu_read_lock(); 296733458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 296833458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 296933458eabSTheodore Ts'o if (usr_qf_name) 297033458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 297133458eabSTheodore Ts'o if (grp_qf_name) 297233458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 297333458eabSTheodore Ts'o rcu_read_unlock(); 29742adf6da8STheodore Ts'o #endif 29752adf6da8STheodore Ts'o } 29762adf6da8STheodore Ts'o 29775a916be1STheodore Ts'o static const char *token2str(int token) 29785a916be1STheodore Ts'o { 297997d8a670SLukas Czerner const struct fs_parameter_spec *spec; 29805a916be1STheodore Ts'o 298197d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 298297d8a670SLukas Czerner if (spec->opt == token && !spec->type) 29835a916be1STheodore Ts'o break; 298497d8a670SLukas Czerner return spec->name; 29855a916be1STheodore Ts'o } 29865a916be1STheodore Ts'o 29872adf6da8STheodore Ts'o /* 29882adf6da8STheodore Ts'o * Show an option if 29892adf6da8STheodore Ts'o * - it's set to a non-default value OR 29902adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 29912adf6da8STheodore Ts'o */ 299266acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 299366acdcf4STheodore Ts'o int nodefs) 29942adf6da8STheodore Ts'o { 29952adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 29962adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 299768afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 29985a916be1STheodore Ts'o const struct mount_opts *m; 299966acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 30002adf6da8STheodore Ts'o 300166acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 300266acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 30032adf6da8STheodore Ts'o 30042adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 30055a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 30065a916be1STheodore Ts'o 30075a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 30085a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 30095a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 3010ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 30115a916be1STheodore Ts'o continue; 301268afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 30135a916be1STheodore Ts'o continue; /* skip if same as the default */ 30145a916be1STheodore Ts'o if ((want_set && 30155a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 30165a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 30175a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 30185a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 30195a916be1STheodore Ts'o } 30205a916be1STheodore Ts'o 302108cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 30225a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 302308cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 302408cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 302508cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 30265a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 302708cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 302808cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 302966acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 30305a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 30315a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 30322adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 30335a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 30342adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 30355a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 303666acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 30375a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 303866acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 30395a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 304066acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 30415a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 3042357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 30435a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 304466acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 30455a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 304668afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 304768afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 30482adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30495a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 30502adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30515a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 30522adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 30535a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 30545a916be1STheodore Ts'o } 305566acdcf4STheodore Ts'o if (nodefs || 305666acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 30575a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 30582adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 30592adf6da8STheodore Ts'o 3060ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 306166acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 30625a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3063df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3064df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 30657915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 30667915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3067ed318a6cSEric Biggers 3068ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 30692adf6da8STheodore Ts'o 30704f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 30714f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 30724f74d15fSEric Biggers 30739cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 30749cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 30759cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 30769cb20f94SIra Weiny else 30779cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 30789cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 30799cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 30809cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 30819cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 30829cb20f94SIra Weiny } 30832adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 30842adf6da8STheodore Ts'o return 0; 30852adf6da8STheodore Ts'o } 30862adf6da8STheodore Ts'o 308766acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 308866acdcf4STheodore Ts'o { 308966acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 309066acdcf4STheodore Ts'o } 309166acdcf4STheodore Ts'o 3092ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 309366acdcf4STheodore Ts'o { 309466acdcf4STheodore Ts'o struct super_block *sb = seq->private; 309566acdcf4STheodore Ts'o int rc; 309666acdcf4STheodore Ts'o 3097bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 309866acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 309966acdcf4STheodore Ts'o seq_puts(seq, "\n"); 310066acdcf4STheodore Ts'o return rc; 310166acdcf4STheodore Ts'o } 310266acdcf4STheodore Ts'o 3103617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3104ac27a0ecSDave Kleikamp int read_only) 3105ac27a0ecSDave Kleikamp { 3106617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3107c89128a0SJaegeuk Kim int err = 0; 3108ac27a0ecSDave Kleikamp 3109617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3110b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3111b31e1552SEric Sandeen "forcing read-only mode"); 3112c89128a0SJaegeuk Kim err = -EROFS; 31135adaccacSyangerkun goto done; 3114ac27a0ecSDave Kleikamp } 3115ac27a0ecSDave Kleikamp if (read_only) 3116281b5995STheodore Ts'o goto done; 3117617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3118b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3119b31e1552SEric Sandeen "running e2fsck is recommended"); 3120c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3121b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3122b31e1552SEric Sandeen "warning: mounting fs with errors, " 3123b31e1552SEric Sandeen "running e2fsck is recommended"); 3124ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3125ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3126ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3127b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3128b31e1552SEric Sandeen "warning: maximal mount count reached, " 3129b31e1552SEric Sandeen "running e2fsck is recommended"); 3130ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 31316a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 31326a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3133b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3134b31e1552SEric Sandeen "warning: checktime reached, " 3135b31e1552SEric Sandeen "running e2fsck is recommended"); 31360390131bSFrank Mayhar if (!sbi->s_journal) 3137216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3138ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3139617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3140e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 31416a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 314202f310fcSJan Kara if (sbi->s_journal) { 3143e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 314402f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 314502f310fcSJan Kara ext4_set_feature_orphan_present(sb); 314602f310fcSJan Kara } 3147ac27a0ecSDave Kleikamp 31484392fbc4SJan Kara err = ext4_commit_super(sb); 3149281b5995STheodore Ts'o done: 3150ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3151a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3152a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3153ac27a0ecSDave Kleikamp sb->s_blocksize, 3154ac27a0ecSDave Kleikamp sbi->s_groups_count, 3155617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3156617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3157a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3158ac27a0ecSDave Kleikamp 31597abc52c2SDan Magenheimer cleancache_init_fs(sb); 3160c89128a0SJaegeuk Kim return err; 3161ac27a0ecSDave Kleikamp } 3162ac27a0ecSDave Kleikamp 3163117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3164117fff10STheodore Ts'o { 3165117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 31667c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 316737b0b6b8SDan Carpenter int size, i, j; 3168117fff10STheodore Ts'o 3169117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3170117fff10STheodore Ts'o return 0; 3171117fff10STheodore Ts'o 3172117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3173117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3174117fff10STheodore Ts'o return 0; 3175117fff10STheodore Ts'o 31767c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 31777c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3178117fff10STheodore Ts'o if (!new_groups) { 31797c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31807c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3181117fff10STheodore Ts'o return -ENOMEM; 3182117fff10STheodore Ts'o } 31837c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 31847c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 31857c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 31867c990728SSuraj Jitindar Singh GFP_KERNEL); 31877c990728SSuraj Jitindar Singh if (!new_groups[i]) { 318837b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 318937b0b6b8SDan Carpenter kvfree(new_groups[j]); 31907c990728SSuraj Jitindar Singh kvfree(new_groups); 31917c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31927c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31937c990728SSuraj Jitindar Singh return -ENOMEM; 3194117fff10STheodore Ts'o } 31957c990728SSuraj Jitindar Singh } 31967c990728SSuraj Jitindar Singh rcu_read_lock(); 31977c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 31987c990728SSuraj Jitindar Singh if (old_groups) 31997c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 32007c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 32017c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 32027c990728SSuraj Jitindar Singh rcu_read_unlock(); 32037c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 32047c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 32057c990728SSuraj Jitindar Singh if (old_groups) 32067c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3207117fff10STheodore Ts'o return 0; 3208117fff10STheodore Ts'o } 3209117fff10STheodore Ts'o 3210772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3211772cb7c8SJose R. Santos { 3212772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3213772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 32147c990728SSuraj Jitindar Singh struct flex_groups *fg; 3215772cb7c8SJose R. Santos ext4_group_t flex_group; 3216117fff10STheodore Ts'o int i, err; 3217772cb7c8SJose R. Santos 3218503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3219d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3220772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3221772cb7c8SJose R. Santos return 1; 3222772cb7c8SJose R. Santos } 3223772cb7c8SJose R. Santos 3224117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3225117fff10STheodore Ts'o if (err) 3226772cb7c8SJose R. Santos goto failed; 3227772cb7c8SJose R. Santos 3228772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 322988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3230772cb7c8SJose R. Santos 3231772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 32327c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 32337c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 323490ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 32357c990728SSuraj Jitindar Singh &fg->free_clusters); 32367c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3237772cb7c8SJose R. Santos } 3238772cb7c8SJose R. Santos 3239772cb7c8SJose R. Santos return 1; 3240772cb7c8SJose R. Santos failed: 3241772cb7c8SJose R. Santos return 0; 3242772cb7c8SJose R. Santos } 3243772cb7c8SJose R. Santos 3244e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3245717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3246717d50e4SAndreas Dilger { 3247b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3248717d50e4SAndreas Dilger __u16 crc = 0; 3249717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3250e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3251717d50e4SAndreas Dilger 32529aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3253feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3254feb0ab32SDarrick J. Wong __u32 csum32; 3255b47820edSDaeho Jeong __u16 dummy_csum = 0; 3256feb0ab32SDarrick J. Wong 3257feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3258feb0ab32SDarrick J. Wong sizeof(le_group)); 3259b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3260b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3261b47820edSDaeho Jeong sizeof(dummy_csum)); 3262b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3263b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3264b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3265b47820edSDaeho Jeong sbi->s_desc_size - offset); 3266feb0ab32SDarrick J. Wong 3267feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3268feb0ab32SDarrick J. Wong goto out; 3269feb0ab32SDarrick J. Wong } 3270feb0ab32SDarrick J. Wong 3271feb0ab32SDarrick J. Wong /* old crc16 code */ 3272e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3273813d32f9SDarrick J. Wong return 0; 3274813d32f9SDarrick J. Wong 3275717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3276717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3277717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3278717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3279717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3280e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3281717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3282717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3283717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3284717d50e4SAndreas Dilger offset); 3285717d50e4SAndreas Dilger 3286feb0ab32SDarrick J. Wong out: 3287717d50e4SAndreas Dilger return cpu_to_le16(crc); 3288717d50e4SAndreas Dilger } 3289717d50e4SAndreas Dilger 3290feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3291717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3292717d50e4SAndreas Dilger { 3293feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3294e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3295717d50e4SAndreas Dilger return 0; 3296717d50e4SAndreas Dilger 3297717d50e4SAndreas Dilger return 1; 3298717d50e4SAndreas Dilger } 3299717d50e4SAndreas Dilger 3300feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3301feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3302feb0ab32SDarrick J. Wong { 3303feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3304feb0ab32SDarrick J. Wong return; 3305e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3306feb0ab32SDarrick J. Wong } 3307feb0ab32SDarrick J. Wong 3308ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3309bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3310829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3311bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3312ac27a0ecSDave Kleikamp { 3313617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3314617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3315617ba13bSMingming Cao ext4_fsblk_t last_block; 331644de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3317bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3318bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3319bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3320ce421581SJose R. Santos int flexbg_flag = 0; 3321bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3322ac27a0ecSDave Kleikamp 3323e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3324ce421581SJose R. Santos flexbg_flag = 1; 3325ce421581SJose R. Santos 3326617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3327ac27a0ecSDave Kleikamp 3328197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3329197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3330197cd65aSAkinobu Mita 3331ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3332bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3333ac27a0ecSDave Kleikamp else 3334ac27a0ecSDave Kleikamp last_block = first_block + 3335617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3336ac27a0ecSDave Kleikamp 3337bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3338bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3339bfff6873SLukas Czerner grp = i; 3340bfff6873SLukas Czerner 33418fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3342829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3343829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3344829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3345829fa70dSTheodore Ts'o "superblock", i); 334618db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 334718db4b4eSTheodore Ts'o return 0; 3348829fa70dSTheodore Ts'o } 334977260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 335077260807STheodore Ts'o block_bitmap <= last_bg_block) { 335177260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 335277260807STheodore Ts'o "Block bitmap for group %u overlaps " 335377260807STheodore Ts'o "block group descriptors", i); 335477260807STheodore Ts'o if (!sb_rdonly(sb)) 335577260807STheodore Ts'o return 0; 335677260807STheodore Ts'o } 33572b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3358b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3359a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3360b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3361ac27a0ecSDave Kleikamp return 0; 3362ac27a0ecSDave Kleikamp } 33638fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3364829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3365829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3366829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3367829fa70dSTheodore Ts'o "superblock", i); 336818db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 336918db4b4eSTheodore Ts'o return 0; 3370829fa70dSTheodore Ts'o } 337177260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 337277260807STheodore Ts'o inode_bitmap <= last_bg_block) { 337377260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 337477260807STheodore Ts'o "Inode bitmap for group %u overlaps " 337577260807STheodore Ts'o "block group descriptors", i); 337677260807STheodore Ts'o if (!sb_rdonly(sb)) 337777260807STheodore Ts'o return 0; 337877260807STheodore Ts'o } 33792b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3380b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3381a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3382b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3383ac27a0ecSDave Kleikamp return 0; 3384ac27a0ecSDave Kleikamp } 33858fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3386829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3387829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3388829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3389829fa70dSTheodore Ts'o "superblock", i); 339018db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 339118db4b4eSTheodore Ts'o return 0; 3392829fa70dSTheodore Ts'o } 339377260807STheodore Ts'o if (inode_table >= sb_block + 1 && 339477260807STheodore Ts'o inode_table <= last_bg_block) { 339577260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 339677260807STheodore Ts'o "Inode table for group %u overlaps " 339777260807STheodore Ts'o "block group descriptors", i); 339877260807STheodore Ts'o if (!sb_rdonly(sb)) 339977260807STheodore Ts'o return 0; 340077260807STheodore Ts'o } 3401bd81d8eeSLaurent Vivier if (inode_table < first_block || 34022b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3403b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3404a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3405b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3406ac27a0ecSDave Kleikamp return 0; 3407ac27a0ecSDave Kleikamp } 3408955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3409feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3410b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3411b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3412e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3413fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3414bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3415955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3416717d50e4SAndreas Dilger return 0; 3417717d50e4SAndreas Dilger } 34187ee1ec4cSLi Zefan } 3419955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3420ce421581SJose R. Santos if (!flexbg_flag) 3421617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3422ac27a0ecSDave Kleikamp } 3423bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3424bfff6873SLukas Czerner *first_not_zeroed = grp; 3425ac27a0ecSDave Kleikamp return 1; 3426ac27a0ecSDave Kleikamp } 3427ac27a0ecSDave Kleikamp 3428cd2291a4SEric Sandeen /* 3429cd2291a4SEric Sandeen * Maximal extent format file size. 3430cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3431cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3432cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3433cd2291a4SEric Sandeen * so that won't be a limiting factor. 3434cd2291a4SEric Sandeen * 3435f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3436f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3437f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3438f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3439f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3440f17722f9SLukas Czerner * 3441cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3442cd2291a4SEric Sandeen */ 3443f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3444cd2291a4SEric Sandeen { 3445cd2291a4SEric Sandeen loff_t res; 3446cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3447cd2291a4SEric Sandeen 344872deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 344972deb455SChristoph Hellwig 345072deb455SChristoph Hellwig if (!has_huge_files) { 3451cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3452cd2291a4SEric Sandeen 3453cd2291a4SEric Sandeen /* total blocks in file system block size */ 3454cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3455cd2291a4SEric Sandeen upper_limit <<= blkbits; 3456cd2291a4SEric Sandeen } 3457cd2291a4SEric Sandeen 3458f17722f9SLukas Czerner /* 3459f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3460f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3461f17722f9SLukas Czerner * size 3462f17722f9SLukas Czerner */ 3463f17722f9SLukas Czerner res = (1LL << 32) - 1; 3464cd2291a4SEric Sandeen res <<= blkbits; 3465cd2291a4SEric Sandeen 3466cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3467cd2291a4SEric Sandeen if (res > upper_limit) 3468cd2291a4SEric Sandeen res = upper_limit; 3469cd2291a4SEric Sandeen 3470cd2291a4SEric Sandeen return res; 3471cd2291a4SEric Sandeen } 3472ac27a0ecSDave Kleikamp 3473ac27a0ecSDave Kleikamp /* 3474cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 34750fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 34760fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3477ac27a0ecSDave Kleikamp */ 3478f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3479ac27a0ecSDave Kleikamp { 348075ca6ad4SRitesh Harjani unsigned long long upper_limit, res = EXT4_NDIR_BLOCKS; 34810fc1b451SAneesh Kumar K.V int meta_blocks; 348275ca6ad4SRitesh Harjani 348375ca6ad4SRitesh Harjani /* 348475ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 34850b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 34860b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 34870b8e58a1SAndreas Dilger * 34880b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 34890b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 34900fc1b451SAneesh Kumar K.V */ 349172deb455SChristoph Hellwig if (!has_huge_files) { 34920fc1b451SAneesh Kumar K.V /* 349372deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 349472deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 349572deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 34960fc1b451SAneesh Kumar K.V */ 34970fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 34980fc1b451SAneesh Kumar K.V 34990fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 35000fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 35010fc1b451SAneesh Kumar K.V 35020fc1b451SAneesh Kumar K.V } else { 35038180a562SAneesh Kumar K.V /* 35048180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 35058180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 35068180a562SAneesh Kumar K.V * represent total number of blocks in 35078180a562SAneesh Kumar K.V * file system block size 35088180a562SAneesh Kumar K.V */ 35090fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 35100fc1b451SAneesh Kumar K.V 35110fc1b451SAneesh Kumar K.V } 35120fc1b451SAneesh Kumar K.V 35130fc1b451SAneesh Kumar K.V /* indirect blocks */ 35140fc1b451SAneesh Kumar K.V meta_blocks = 1; 35150fc1b451SAneesh Kumar K.V /* double indirect blocks */ 35160fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 35170fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 35180fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 35190fc1b451SAneesh Kumar K.V 35200fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 35210fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3522ac27a0ecSDave Kleikamp 3523ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3524ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3525ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3526ac27a0ecSDave Kleikamp res <<= bits; 3527ac27a0ecSDave Kleikamp if (res > upper_limit) 3528ac27a0ecSDave Kleikamp res = upper_limit; 35290fc1b451SAneesh Kumar K.V 35300fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 35310fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 35320fc1b451SAneesh Kumar K.V 353375ca6ad4SRitesh Harjani return (loff_t)res; 3534ac27a0ecSDave Kleikamp } 3535ac27a0ecSDave Kleikamp 3536617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 353770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3538ac27a0ecSDave Kleikamp { 3539617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3540fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3541ac27a0ecSDave Kleikamp int has_super = 0; 3542ac27a0ecSDave Kleikamp 3543ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3544ac27a0ecSDave Kleikamp 3545e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 354670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3547ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3548617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3549ac27a0ecSDave Kleikamp has_super = 1; 35500b8e58a1SAndreas Dilger 3551bd63f6b0SDarrick J. Wong /* 3552bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3553bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3554bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3555bd63f6b0SDarrick J. Wong * compensate. 3556bd63f6b0SDarrick J. Wong */ 3557bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 355849598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3559bd63f6b0SDarrick J. Wong has_super++; 3560bd63f6b0SDarrick J. Wong 3561617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3562ac27a0ecSDave Kleikamp } 3563ac27a0ecSDave Kleikamp 3564c9de560dSAlex Tomas /** 3565c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3566c9de560dSAlex Tomas * @sbi: In memory super block info 3567c9de560dSAlex Tomas * 3568c9de560dSAlex Tomas * If we have specified it via mount option, then 3569c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3570c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3571c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3572c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3573c9de560dSAlex Tomas * 3574c9de560dSAlex Tomas */ 3575c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3576c9de560dSAlex Tomas { 3577c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3578c9de560dSAlex Tomas unsigned long stripe_width = 3579c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 35803eb08658SDan Ehrenberg int ret; 3581c9de560dSAlex Tomas 3582c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 35833eb08658SDan Ehrenberg ret = sbi->s_stripe; 35845469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 35853eb08658SDan Ehrenberg ret = stripe_width; 35865469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 35873eb08658SDan Ehrenberg ret = stride; 35883eb08658SDan Ehrenberg else 35893eb08658SDan Ehrenberg ret = 0; 3590c9de560dSAlex Tomas 35913eb08658SDan Ehrenberg /* 35923eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 35933eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 35943eb08658SDan Ehrenberg */ 35953eb08658SDan Ehrenberg if (ret <= 1) 35963eb08658SDan Ehrenberg ret = 0; 3597c9de560dSAlex Tomas 35983eb08658SDan Ehrenberg return ret; 3599c9de560dSAlex Tomas } 3600ac27a0ecSDave Kleikamp 3601a13fb1a4SEric Sandeen /* 3602a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3603a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3604a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3605a13fb1a4SEric Sandeen * 0 if it cannot be. 3606a13fb1a4SEric Sandeen */ 360725c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3608a13fb1a4SEric Sandeen { 3609e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3610a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3611a13fb1a4SEric Sandeen "Couldn't mount because of " 3612a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3613a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3614a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3615a13fb1a4SEric Sandeen return 0; 3616a13fb1a4SEric Sandeen } 3617a13fb1a4SEric Sandeen 3618c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3619c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3620c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3621c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3622c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3623c83ad55eSGabriel Krisman Bertazi return 0; 3624c83ad55eSGabriel Krisman Bertazi } 3625c83ad55eSGabriel Krisman Bertazi #endif 3626c83ad55eSGabriel Krisman Bertazi 3627a13fb1a4SEric Sandeen if (readonly) 3628a13fb1a4SEric Sandeen return 1; 3629a13fb1a4SEric Sandeen 3630e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 36312cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 36321751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 36332cb5cc8bSDarrick J. Wong return 1; 36342cb5cc8bSDarrick J. Wong } 36352cb5cc8bSDarrick J. Wong 3636a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3637e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3638a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3639a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3640a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3641a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3642a13fb1a4SEric Sandeen return 0; 3643a13fb1a4SEric Sandeen } 3644e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3645bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3646bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3647bab08ab9STheodore Ts'o "extents feature\n"); 3648bab08ab9STheodore Ts'o return 0; 3649bab08ab9STheodore Ts'o } 36507c319d32SAditya Kali 36519db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3652d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3653d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 36547c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3655d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3656689c958cSLi Xi return 0; 3657689c958cSLi Xi } 36587c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3659a13fb1a4SEric Sandeen return 1; 3660a13fb1a4SEric Sandeen } 3661a13fb1a4SEric Sandeen 366266e61a9eSTheodore Ts'o /* 366366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 366466e61a9eSTheodore Ts'o * on the file system 366566e61a9eSTheodore Ts'o */ 3666235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 366766e61a9eSTheodore Ts'o { 3668235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3669235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3670235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 367166e61a9eSTheodore Ts'o 367266e61a9eSTheodore Ts'o if (es->s_error_count) 3673ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3674ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 367566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 367666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36776a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36786a0678a7SArnd Bergmann sb->s_id, 36796a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 368066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 368166e61a9eSTheodore Ts'o es->s_first_error_func, 368266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 368366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3684651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 368566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 368666e61a9eSTheodore Ts'o if (es->s_first_error_block) 3687651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 368866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3689651e1c3bSJoe Perches printk(KERN_CONT "\n"); 369066e61a9eSTheodore Ts'o } 369166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 36926a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 36936a0678a7SArnd Bergmann sb->s_id, 36946a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 369566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 369666e61a9eSTheodore Ts'o es->s_last_error_func, 369766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 369866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3699651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 370066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 370166e61a9eSTheodore Ts'o if (es->s_last_error_block) 3702651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 370366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3704651e1c3bSJoe Perches printk(KERN_CONT "\n"); 370566e61a9eSTheodore Ts'o } 370666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 370766e61a9eSTheodore Ts'o } 370866e61a9eSTheodore Ts'o 3709bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3710bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3711bfff6873SLukas Czerner { 3712bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 37133d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 37143d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 37153d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 37163d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3717bfff6873SLukas Czerner int ret = 0; 371839fec688SShaoying Xu u64 start_time; 3719bfff6873SLukas Czerner 37203d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 37213d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 37223d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 37233d392b26STheodore Ts'o if (prefetch_ios) 37243d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 37253d392b26STheodore Ts'o prefetch_ios); 37263d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 37273d392b26STheodore Ts'o prefetch_ios); 37283d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 37293d392b26STheodore Ts'o ret = 1; 37303d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 37313d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 37323d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 37333d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 37343d392b26STheodore Ts'o ret = 0; 37353d392b26STheodore Ts'o } 37363d392b26STheodore Ts'o } 37373d392b26STheodore Ts'o return ret; 37383d392b26STheodore Ts'o } 3739bfff6873SLukas Czerner 37403d392b26STheodore Ts'o for (; group < ngroups; group++) { 3741bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3742bfff6873SLukas Czerner if (!gdp) { 3743bfff6873SLukas Czerner ret = 1; 3744bfff6873SLukas Czerner break; 3745bfff6873SLukas Czerner } 3746bfff6873SLukas Czerner 3747bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3748bfff6873SLukas Czerner break; 3749bfff6873SLukas Czerner } 3750bfff6873SLukas Czerner 37517f511862STheodore Ts'o if (group >= ngroups) 3752bfff6873SLukas Czerner ret = 1; 3753bfff6873SLukas Czerner 3754bfff6873SLukas Czerner if (!ret) { 375539fec688SShaoying Xu start_time = ktime_get_real_ns(); 3756bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3757bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37583d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3759bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 376039fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 376139fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3762bfff6873SLukas Czerner } 3763bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3764bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3765bfff6873SLukas Czerner } 3766bfff6873SLukas Czerner return ret; 3767bfff6873SLukas Czerner } 3768bfff6873SLukas Czerner 3769bfff6873SLukas Czerner /* 3770bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 37714ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3772bfff6873SLukas Czerner */ 3773bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3774bfff6873SLukas Czerner { 3775bfff6873SLukas Czerner if (!elr) 3776bfff6873SLukas Czerner return; 3777bfff6873SLukas Czerner 3778bfff6873SLukas Czerner list_del(&elr->lr_request); 37793d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3780bfff6873SLukas Czerner kfree(elr); 3781bfff6873SLukas Czerner } 3782bfff6873SLukas Czerner 3783bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3784bfff6873SLukas Czerner { 37851bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 37861bb933fbSLukas Czerner if (!ext4_li_info) { 37871bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3788bfff6873SLukas Czerner return; 37891bb933fbSLukas Czerner } 3790bfff6873SLukas Czerner 3791bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 37921bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3793bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 37941bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3795bfff6873SLukas Czerner } 3796bfff6873SLukas Czerner 37978f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 37988f1f7453SEric Sandeen 3799bfff6873SLukas Czerner /* 3800bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3801bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3802bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3803bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3804bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3805bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3806bfff6873SLukas Czerner * next waking time and put itself into sleep. 3807bfff6873SLukas Czerner */ 3808bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3809bfff6873SLukas Czerner { 3810bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3811bfff6873SLukas Czerner struct list_head *pos, *n; 3812bfff6873SLukas Czerner struct ext4_li_request *elr; 38134ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3814bfff6873SLukas Czerner 3815bfff6873SLukas Czerner BUG_ON(NULL == eli); 3816bfff6873SLukas Czerner 3817bfff6873SLukas Czerner cont_thread: 3818bfff6873SLukas Czerner while (true) { 3819bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3820bfff6873SLukas Czerner 3821bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3822bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3823bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3824bfff6873SLukas Czerner goto exit_thread; 3825bfff6873SLukas Czerner } 3826bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3827e22834f0SDmitry Monakhov int err = 0; 3828e22834f0SDmitry Monakhov int progress = 0; 3829bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3830bfff6873SLukas Czerner lr_request); 3831bfff6873SLukas Czerner 3832e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3833e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3834e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3835e22834f0SDmitry Monakhov continue; 3836e22834f0SDmitry Monakhov } 3837e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3838e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3839e22834f0SDmitry Monakhov progress = 1; 3840e22834f0SDmitry Monakhov /* 3841e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3842e22834f0SDmitry Monakhov * be removed from the list, it is 3843e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3844e22834f0SDmitry Monakhov */ 3845e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3846e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3847e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3848e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3849e22834f0SDmitry Monakhov n = pos->next; 3850e22834f0SDmitry Monakhov } 3851e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3852e22834f0SDmitry Monakhov } 3853b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3854e22834f0SDmitry Monakhov if (err) { 3855bfff6873SLukas Czerner ext4_remove_li_request(elr); 3856bfff6873SLukas Czerner continue; 3857bfff6873SLukas Czerner } 3858e22834f0SDmitry Monakhov if (!progress) { 3859e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3860e22834f0SDmitry Monakhov (prandom_u32() 3861e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3862b2c78cd0STheodore Ts'o } 3863bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3864bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3865bfff6873SLukas Czerner } 3866bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3867bfff6873SLukas Czerner 3868a0acae0eSTejun Heo try_to_freeze(); 3869bfff6873SLukas Czerner 38704ed5c033SLukas Czerner cur = jiffies; 38714ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3872f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3873bfff6873SLukas Czerner cond_resched(); 3874bfff6873SLukas Czerner continue; 3875bfff6873SLukas Czerner } 3876bfff6873SLukas Czerner 38774ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38784ed5c033SLukas Czerner 38798f1f7453SEric Sandeen if (kthread_should_stop()) { 38808f1f7453SEric Sandeen ext4_clear_request_list(); 38818f1f7453SEric Sandeen goto exit_thread; 38828f1f7453SEric Sandeen } 3883bfff6873SLukas Czerner } 3884bfff6873SLukas Czerner 3885bfff6873SLukas Czerner exit_thread: 3886bfff6873SLukas Czerner /* 3887bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3888bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3889bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3890bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3891bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3892bfff6873SLukas Czerner * new one. 3893bfff6873SLukas Czerner */ 3894bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3895bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3896bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3897bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3898bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3899bfff6873SLukas Czerner goto cont_thread; 3900bfff6873SLukas Czerner } 3901bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3902bfff6873SLukas Czerner kfree(ext4_li_info); 3903bfff6873SLukas Czerner ext4_li_info = NULL; 3904bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3905bfff6873SLukas Czerner 3906bfff6873SLukas Czerner return 0; 3907bfff6873SLukas Czerner } 3908bfff6873SLukas Czerner 3909bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3910bfff6873SLukas Czerner { 3911bfff6873SLukas Czerner struct list_head *pos, *n; 3912bfff6873SLukas Czerner struct ext4_li_request *elr; 3913bfff6873SLukas Czerner 3914bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3915bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3916bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3917bfff6873SLukas Czerner lr_request); 3918bfff6873SLukas Czerner ext4_remove_li_request(elr); 3919bfff6873SLukas Czerner } 3920bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3921bfff6873SLukas Czerner } 3922bfff6873SLukas Czerner 3923bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3924bfff6873SLukas Czerner { 39258f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 39268f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 39278f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 39288f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3929bfff6873SLukas Czerner ext4_clear_request_list(); 3930bfff6873SLukas Czerner kfree(ext4_li_info); 3931bfff6873SLukas Czerner ext4_li_info = NULL; 393292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3933bfff6873SLukas Czerner "initialization thread\n", 3934bfff6873SLukas Czerner err); 3935bfff6873SLukas Czerner return err; 3936bfff6873SLukas Czerner } 3937bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3938bfff6873SLukas Czerner return 0; 3939bfff6873SLukas Czerner } 3940bfff6873SLukas Czerner 3941bfff6873SLukas Czerner /* 3942bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3943bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3944bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3945bfff6873SLukas Czerner * groups and return total number of groups. 3946bfff6873SLukas Czerner */ 3947bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3948bfff6873SLukas Czerner { 3949bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3950bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3951bfff6873SLukas Czerner 39528844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 39538844618dSTheodore Ts'o return ngroups; 39548844618dSTheodore Ts'o 3955bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3956bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3957bfff6873SLukas Czerner if (!gdp) 3958bfff6873SLukas Czerner continue; 3959bfff6873SLukas Czerner 396050122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3961bfff6873SLukas Czerner break; 3962bfff6873SLukas Czerner } 3963bfff6873SLukas Czerner 3964bfff6873SLukas Czerner return group; 3965bfff6873SLukas Czerner } 3966bfff6873SLukas Czerner 3967bfff6873SLukas Czerner static int ext4_li_info_new(void) 3968bfff6873SLukas Czerner { 3969bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3970bfff6873SLukas Czerner 3971bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3972bfff6873SLukas Czerner if (!eli) 3973bfff6873SLukas Czerner return -ENOMEM; 3974bfff6873SLukas Czerner 3975bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3976bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3977bfff6873SLukas Czerner 3978bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3979bfff6873SLukas Czerner 3980bfff6873SLukas Czerner ext4_li_info = eli; 3981bfff6873SLukas Czerner 3982bfff6873SLukas Czerner return 0; 3983bfff6873SLukas Czerner } 3984bfff6873SLukas Czerner 3985bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3986bfff6873SLukas Czerner ext4_group_t start) 3987bfff6873SLukas Czerner { 3988bfff6873SLukas Czerner struct ext4_li_request *elr; 3989bfff6873SLukas Czerner 3990bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3991bfff6873SLukas Czerner if (!elr) 3992bfff6873SLukas Czerner return NULL; 3993bfff6873SLukas Czerner 3994bfff6873SLukas Czerner elr->lr_super = sb; 39953d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 399621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 39973d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3998bfff6873SLukas Czerner elr->lr_next_group = start; 399921175ca4SHarshad Shirwadkar } else { 400021175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 40013d392b26STheodore Ts'o } 4002bfff6873SLukas Czerner 4003bfff6873SLukas Czerner /* 4004bfff6873SLukas Czerner * Randomize first schedule time of the request to 4005bfff6873SLukas Czerner * spread the inode table initialization requests 4006bfff6873SLukas Czerner * better. 4007bfff6873SLukas Czerner */ 4008dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 4009dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 4010bfff6873SLukas Czerner return elr; 4011bfff6873SLukas Czerner } 4012bfff6873SLukas Czerner 40137f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 4014bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 4015bfff6873SLukas Czerner { 4016bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 40177f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 401849598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 40196c5a6cb9SAndrew Morton int ret = 0; 4020bfff6873SLukas Czerner 40217f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 402251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 402351ce6511SLukas Czerner /* 402451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 402551ce6511SLukas Czerner * s_li_wait_mult might have changed. 402651ce6511SLukas Czerner */ 402751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 40287f511862STheodore Ts'o goto out; 402951ce6511SLukas Czerner } 4030bfff6873SLukas Czerner 403121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 40323d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 40333d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 40347f511862STheodore Ts'o goto out; 4035bfff6873SLukas Czerner 4036bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 40377f511862STheodore Ts'o if (!elr) { 40387f511862STheodore Ts'o ret = -ENOMEM; 40397f511862STheodore Ts'o goto out; 40407f511862STheodore Ts'o } 4041bfff6873SLukas Czerner 4042bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4043bfff6873SLukas Czerner ret = ext4_li_info_new(); 4044bfff6873SLukas Czerner if (ret) 4045bfff6873SLukas Czerner goto out; 4046bfff6873SLukas Czerner } 4047bfff6873SLukas Czerner 4048bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4049bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4050bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4051bfff6873SLukas Czerner 4052bfff6873SLukas Czerner sbi->s_li_request = elr; 405346e4690bSTao Ma /* 405446e4690bSTao Ma * set elr to NULL here since it has been inserted to 405546e4690bSTao Ma * the request_list and the removal and free of it is 405646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 405746e4690bSTao Ma */ 405846e4690bSTao Ma elr = NULL; 4059bfff6873SLukas Czerner 4060bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4061bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4062bfff6873SLukas Czerner if (ret) 4063bfff6873SLukas Czerner goto out; 4064bfff6873SLukas Czerner } 4065bfff6873SLukas Czerner out: 4066bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4067beed5ecbSNicolas Kaiser if (ret) 4068bfff6873SLukas Czerner kfree(elr); 4069bfff6873SLukas Czerner return ret; 4070bfff6873SLukas Czerner } 4071bfff6873SLukas Czerner 4072bfff6873SLukas Czerner /* 4073bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4074bfff6873SLukas Czerner * module unload. 4075bfff6873SLukas Czerner */ 4076bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4077bfff6873SLukas Czerner { 4078bfff6873SLukas Czerner /* 4079bfff6873SLukas Czerner * If thread exited earlier 4080bfff6873SLukas Czerner * there's nothing to be done. 4081bfff6873SLukas Czerner */ 40828f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4083bfff6873SLukas Czerner return; 4084bfff6873SLukas Czerner 40858f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4086bfff6873SLukas Czerner } 4087bfff6873SLukas Czerner 408825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 408925ed6e8aSDarrick J. Wong { 409025ed6e8aSDarrick J. Wong int ret = 1; 409125ed6e8aSDarrick J. Wong int compat, incompat; 409225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 409325ed6e8aSDarrick J. Wong 40949aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4095db9ee220SDarrick J. Wong /* journal checksum v3 */ 409625ed6e8aSDarrick J. Wong compat = 0; 4097db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 409825ed6e8aSDarrick J. Wong } else { 409925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 410025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 410125ed6e8aSDarrick J. Wong incompat = 0; 410225ed6e8aSDarrick J. Wong } 410325ed6e8aSDarrick J. Wong 4104feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4105feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4106feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4107feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 410825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 410925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 411025ed6e8aSDarrick J. Wong compat, 0, 411125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 411225ed6e8aSDarrick J. Wong incompat); 411325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 411425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 411525ed6e8aSDarrick J. Wong compat, 0, 411625ed6e8aSDarrick J. Wong incompat); 411725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 411825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 411925ed6e8aSDarrick J. Wong } else { 4120feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4121feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 412225ed6e8aSDarrick J. Wong } 412325ed6e8aSDarrick J. Wong 412425ed6e8aSDarrick J. Wong return ret; 412525ed6e8aSDarrick J. Wong } 412625ed6e8aSDarrick J. Wong 4127952fc18eSTheodore Ts'o /* 4128952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4129952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4130952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4131952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4132952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4133952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4134952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4135952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4136952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4137952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4138952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4139952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4140952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4141952fc18eSTheodore Ts'o */ 4142952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4143952fc18eSTheodore Ts'o char *buf) 4144952fc18eSTheodore Ts'o { 4145952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4146952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4147952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4148952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4149952fc18eSTheodore Ts'o int s, j, count = 0; 4150952fc18eSTheodore Ts'o 4151e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 41520548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 41530548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41540548bbb8STheodore Ts'o 4155952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4156952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4157952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4158952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4159952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4160952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4161952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4162952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4163952fc18eSTheodore Ts'o count++; 4164952fc18eSTheodore Ts'o } 4165952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4166952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4167952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4168952fc18eSTheodore Ts'o count++; 4169952fc18eSTheodore Ts'o } 4170952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4171952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4172952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4173952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4174952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4175952fc18eSTheodore Ts'o count++; 4176952fc18eSTheodore Ts'o } 4177952fc18eSTheodore Ts'o if (i != grp) 4178952fc18eSTheodore Ts'o continue; 4179952fc18eSTheodore Ts'o s = 0; 4180952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4181952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4182952fc18eSTheodore Ts'o count++; 4183952fc18eSTheodore Ts'o } 4184c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4185c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4186c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4187c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4188c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4189952fc18eSTheodore Ts'o } 4190c48ae41bSTheodore Ts'o count += j; 4191c48ae41bSTheodore Ts'o for (; j > 0; j--) 4192c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4193952fc18eSTheodore Ts'o } 4194952fc18eSTheodore Ts'o if (!count) 4195952fc18eSTheodore Ts'o return 0; 4196952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4197952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4198952fc18eSTheodore Ts'o } 4199952fc18eSTheodore Ts'o 4200952fc18eSTheodore Ts'o /* 4201952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4202952fc18eSTheodore Ts'o */ 4203952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4204952fc18eSTheodore Ts'o { 4205952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4206952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 42073c816dedSEric Whitney struct inode *j_inode; 42083c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4209952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4210952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 42114fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4212952fc18eSTheodore Ts'o 4213952fc18eSTheodore Ts'o if (!buf) 4214952fc18eSTheodore Ts'o return -ENOMEM; 4215952fc18eSTheodore Ts'o 4216952fc18eSTheodore Ts'o /* 4217952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4218952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4219952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4220952fc18eSTheodore Ts'o */ 4221952fc18eSTheodore Ts'o 4222952fc18eSTheodore Ts'o /* 4223952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4224952fc18eSTheodore Ts'o */ 4225952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4226952fc18eSTheodore Ts'o 4227952fc18eSTheodore Ts'o /* 4228952fc18eSTheodore Ts'o * Add the overhead found in each block group 4229952fc18eSTheodore Ts'o */ 4230952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4231952fc18eSTheodore Ts'o int blks; 4232952fc18eSTheodore Ts'o 4233952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4234952fc18eSTheodore Ts'o overhead += blks; 4235952fc18eSTheodore Ts'o if (blks) 4236952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4237952fc18eSTheodore Ts'o cond_resched(); 4238952fc18eSTheodore Ts'o } 42393c816dedSEric Whitney 42403c816dedSEric Whitney /* 42413c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 42423c816dedSEric Whitney * loaded or not 42433c816dedSEric Whitney */ 4244ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4245ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4246f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4247f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 42483c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 42493c816dedSEric Whitney if (j_inode) { 42503c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 42513c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42523c816dedSEric Whitney iput(j_inode); 42533c816dedSEric Whitney } else { 42543c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42553c816dedSEric Whitney } 42563c816dedSEric Whitney } 4257952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4258952fc18eSTheodore Ts'o smp_wmb(); 4259952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4260952fc18eSTheodore Ts'o return 0; 4261952fc18eSTheodore Ts'o } 4262952fc18eSTheodore Ts'o 4263b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 426427dd4385SLukas Czerner { 426527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4266b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 426727dd4385SLukas Czerner 426827dd4385SLukas Czerner /* 426930fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 427030fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 427130fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 427230fac0f7SJan Kara * to keep ext2/3 backward compatibility. 427330fac0f7SJan Kara */ 4274e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4275b5799018STheodore Ts'o return; 427630fac0f7SJan Kara /* 427727dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 427827dd4385SLukas Czerner * This should cover the situations where we can not afford to run 427927dd4385SLukas Czerner * out of space like for example punch hole, or converting 4280556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 428127dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 428227dd4385SLukas Czerner * very rare. 428327dd4385SLukas Czerner */ 4284b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4285b5799018STheodore Ts'o sbi->s_cluster_bits); 428627dd4385SLukas Czerner 428727dd4385SLukas Czerner do_div(resv_clusters, 50); 428827dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 428927dd4385SLukas Czerner 4290b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 429127dd4385SLukas Czerner } 429227dd4385SLukas Czerner 4293ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4294ca9b404fSRoman Anufriev { 4295ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4296ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4297ca9b404fSRoman Anufriev return "none"; 4298ca9b404fSRoman Anufriev 4299ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4300ca9b404fSRoman Anufriev return "journalled"; 4301ca9b404fSRoman Anufriev else 4302ca9b404fSRoman Anufriev return "writeback"; 4303ca9b404fSRoman Anufriev #else 4304ca9b404fSRoman Anufriev return "disabled"; 4305ca9b404fSRoman Anufriev #endif 4306ca9b404fSRoman Anufriev } 4307ca9b404fSRoman Anufriev 4308188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4309188c299eSJan Kara enum ext4_journal_trigger_type type, 4310188c299eSJan Kara void (*trigger)( 4311188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4312188c299eSJan Kara struct buffer_head *bh, 4313188c299eSJan Kara void *mapped_data, 4314188c299eSJan Kara size_t size)) 4315188c299eSJan Kara { 4316188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4317188c299eSJan Kara 4318188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4319188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4320188c299eSJan Kara } 4321188c299eSJan Kara 43227edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4323ac27a0ecSDave Kleikamp { 43247edfd85bSLukas Czerner if (!sbi) 43257edfd85bSLukas Czerner return; 43267edfd85bSLukas Czerner 43277edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 43287edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 43297edfd85bSLukas Czerner kfree(sbi); 43307edfd85bSLukas Czerner } 43317edfd85bSLukas Czerner 43327edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 43337edfd85bSLukas Czerner { 43347edfd85bSLukas Czerner struct ext4_sb_info *sbi; 43357edfd85bSLukas Czerner 43367edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 43377edfd85bSLukas Czerner if (!sbi) 43387edfd85bSLukas Czerner return NULL; 43397edfd85bSLukas Czerner 43407edfd85bSLukas Czerner sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev); 43417edfd85bSLukas Czerner 43427edfd85bSLukas Czerner sbi->s_blockgroup_lock = 43437edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 43447edfd85bSLukas Czerner 43457edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 43467edfd85bSLukas Czerner goto err_out; 43477edfd85bSLukas Czerner 43487edfd85bSLukas Czerner sb->s_fs_info = sbi; 43497edfd85bSLukas Czerner sbi->s_sb = sb; 43507edfd85bSLukas Czerner return sbi; 43517edfd85bSLukas Czerner err_out: 43527edfd85bSLukas Czerner fs_put_dax(sbi->s_daxdev); 43537edfd85bSLukas Czerner kfree(sbi); 43547edfd85bSLukas Czerner return NULL; 43557edfd85bSLukas Czerner } 43567edfd85bSLukas Czerner 4357960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 43587edfd85bSLukas Czerner { 43591d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4360617ba13bSMingming Cao struct ext4_super_block *es = NULL; 43617edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 43627c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4363617ba13bSMingming Cao ext4_fsblk_t block; 436470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4365ac27a0ecSDave Kleikamp unsigned long offset = 0; 4366ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4367ac27a0ecSDave Kleikamp struct inode *root; 4368dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4369281b5995STheodore Ts'o int blocksize, clustersize; 43704ec11028STheodore Ts'o unsigned int db_count; 43714ec11028STheodore Ts'o unsigned int i; 4372ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4373bd81d8eeSLaurent Vivier __u64 blocks_count; 437407aa2ea1SLukas Czerner int err = 0; 4375bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 43767edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 4377960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 4378b237e304SHarshad Shirwadkar 4379b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 43807edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 43817edfd85bSLukas Czerner ctx->mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4382ac27a0ecSDave Kleikamp 4383240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4384f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 43858446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4386ac27a0ecSDave Kleikamp 438707aa2ea1SLukas Czerner /* -EINVAL is default */ 4388dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4389617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4390ac27a0ecSDave Kleikamp if (!blocksize) { 4391b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4392ac27a0ecSDave Kleikamp goto out_fail; 4393ac27a0ecSDave Kleikamp } 4394ac27a0ecSDave Kleikamp 4395ac27a0ecSDave Kleikamp /* 4396617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4397ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4398ac27a0ecSDave Kleikamp */ 4399617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 44007edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 440170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4402ac27a0ecSDave Kleikamp } else { 44037edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block; 4404ac27a0ecSDave Kleikamp } 4405ac27a0ecSDave Kleikamp 44068394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 44078394a6abSzhangyi (F) if (IS_ERR(bh)) { 4408b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 44098394a6abSzhangyi (F) ret = PTR_ERR(bh); 4410ac27a0ecSDave Kleikamp goto out_fail; 4411ac27a0ecSDave Kleikamp } 4412ac27a0ecSDave Kleikamp /* 4413ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4414617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4415ac27a0ecSDave Kleikamp */ 44162716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4417ac27a0ecSDave Kleikamp sbi->s_es = es; 4418ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4419617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4420617ba13bSMingming Cao goto cantfind_ext4; 4421afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4422ac27a0ecSDave Kleikamp 4423feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4424e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4425e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4426363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4427feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4428feb0ab32SDarrick J. Wong 4429d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4430d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4431d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4432d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4433d25425f8SDarrick J. Wong silent = 1; 4434d25425f8SDarrick J. Wong goto cantfind_ext4; 4435d25425f8SDarrick J. Wong } 443602f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 443702f310fcSJan Kara ext4_orphan_file_block_trigger); 4438d25425f8SDarrick J. Wong 44390441984aSDarrick J. Wong /* Load the checksum driver */ 44400441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 44410441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 44420441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 44430441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 44440441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 44450441984aSDarrick J. Wong goto failed_mount; 44460441984aSDarrick J. Wong } 44470441984aSDarrick J. Wong 4448a9c47317SDarrick J. Wong /* Check superblock checksum */ 4449a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4450a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4451a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4452a9c47317SDarrick J. Wong silent = 1; 44536a797d27SDarrick J. Wong ret = -EFSBADCRC; 4454a9c47317SDarrick J. Wong goto cantfind_ext4; 4455a9c47317SDarrick J. Wong } 4456a9c47317SDarrick J. Wong 4457a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4458e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 44598c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4460dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4461a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4462a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4463a9c47317SDarrick J. Wong 4464ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4465ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4466fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4467617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4468fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 446987f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4470fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4471617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4472fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4473ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4474fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 447503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4476fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 44772e7842b8SHugh Dickins #endif 4478995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4479995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 448098c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 448198c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 448298c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 448398c1a759SDarrick J. Wong 4484617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4485fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4486617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4487fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4488617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4489fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4490ac27a0ecSDave Kleikamp 4491617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4492fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4493bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4494fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4495bb4f397aSAneesh Kumar K.V else 4496fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 449745f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4498fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 44998b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4500fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4501ac27a0ecSDave Kleikamp 450208cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 450308cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 450430773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 450530773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 450630773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4507ac27a0ecSDave Kleikamp 45088b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4509fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4510ac27a0ecSDave Kleikamp 45111e2462f9SMingming Cao /* 4512dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4513dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4514dd919b98SAneesh Kumar K.V */ 4515bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 45168b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4517fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4518dd919b98SAneesh Kumar K.V 451951ce6511SLukas Czerner /* 452051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 452151ce6511SLukas Czerner * no mount option specified. 452251ce6511SLukas Czerner */ 452351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 452451ce6511SLukas Czerner 4525c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4526c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4527c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4528c9200760STheodore Ts'o "Invalid log block size: %u", 4529c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4530c9200760STheodore Ts'o goto failed_mount; 4531c9200760STheodore Ts'o } 4532c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4533c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4534c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4535c9200760STheodore Ts'o "Invalid log cluster size: %u", 4536c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4537c9200760STheodore Ts'o goto failed_mount; 4538c9200760STheodore Ts'o } 4539c9200760STheodore Ts'o 4540c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4541626b035bSRitesh Harjani 4542626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4543626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4544626b035bSRitesh Harjani 45459803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 45469803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 45479803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 45489803387cSTheodore Ts'o } else { 45499803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 45509803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 45519803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 45529803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 45539803387cSTheodore Ts'o sbi->s_first_ino); 45549803387cSTheodore Ts'o goto failed_mount; 45559803387cSTheodore Ts'o } 45569803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 45579803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 45589803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 45599803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45609803387cSTheodore Ts'o "unsupported inode size: %d", 45619803387cSTheodore Ts'o sbi->s_inode_size); 45624f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 45639803387cSTheodore Ts'o goto failed_mount; 45649803387cSTheodore Ts'o } 45659803387cSTheodore Ts'o /* 45669803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 45679803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 45689803387cSTheodore Ts'o * field should suffice to ensure we have extra space 45699803387cSTheodore Ts'o * for all three. 45709803387cSTheodore Ts'o */ 45719803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 45729803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 45739803387cSTheodore Ts'o sb->s_time_gran = 1; 45749803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 45759803387cSTheodore Ts'o } else { 45769803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 45779803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 45789803387cSTheodore Ts'o } 45799803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 45809803387cSTheodore Ts'o } 45819803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 45829803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 45839803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 45849803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 45859803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 45869803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 45879803387cSTheodore Ts'o 45889803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 45899803387cSTheodore Ts'o if (v > max) { 45909803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45919803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 45929803387cSTheodore Ts'o goto failed_mount; 45939803387cSTheodore Ts'o } 45949803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 45959803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 45969803387cSTheodore Ts'o 45979803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 45989803387cSTheodore Ts'o if (v > max) { 45999803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 46009803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 46019803387cSTheodore Ts'o goto failed_mount; 46029803387cSTheodore Ts'o } 46039803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 46049803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 46059803387cSTheodore Ts'o } 46069803387cSTheodore Ts'o } 46079803387cSTheodore Ts'o 46087edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 46097edfd85bSLukas Czerner if (err < 0) 46105aee0f8aSTheodore Ts'o goto failed_mount; 46117edfd85bSLukas Czerner 46125a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 46137edfd85bSLukas Czerner 46147edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 46157edfd85bSLukas Czerner if (err < 0) 46167edfd85bSLukas Czerner goto failed_mount; 46177edfd85bSLukas Czerner 46187edfd85bSLukas Czerner err = ext4_apply_options(fc, sb); 46197edfd85bSLukas Czerner if (err < 0) 4620ac27a0ecSDave Kleikamp goto failed_mount; 4621ac27a0ecSDave Kleikamp 4622c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4623f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4624c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4625c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4626c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4627c83ad55eSGabriel Krisman Bertazi 4628c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4629c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4630c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4631c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4632c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4633c83ad55eSGabriel Krisman Bertazi } 4634c83ad55eSGabriel Krisman Bertazi 4635c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4636c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4637c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4638c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4639c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4640c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4641c83ad55eSGabriel Krisman Bertazi encoding_flags); 4642c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4643c83ad55eSGabriel Krisman Bertazi } 4644c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4645c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4646c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4647c83ad55eSGabriel Krisman Bertazi 4648f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4649f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4650c83ad55eSGabriel Krisman Bertazi } 4651c83ad55eSGabriel Krisman Bertazi #endif 4652c83ad55eSGabriel Krisman Bertazi 465356889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4654556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4655781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4656244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4657556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 465856889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 465956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 466056889787STheodore Ts'o "both data=journal and delalloc"); 466156889787STheodore Ts'o goto failed_mount; 466256889787STheodore Ts'o } 4663fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4664923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4665923ae0ffSRoss Zwisler "both data=journal and dax"); 4666923ae0ffSRoss Zwisler goto failed_mount; 4667923ae0ffSRoss Zwisler } 466873b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 466973b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 467073b92a2aSSergey Karamov "encrypted files will use data=ordered " 467173b92a2aSSergey Karamov "instead of data journaling mode"); 467273b92a2aSSergey Karamov } 467356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 467456889787STheodore Ts'o clear_opt(sb, DELALLOC); 4675001e4a87STejun Heo } else { 4676001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 467756889787STheodore Ts'o } 467856889787STheodore Ts'o 46791751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 46801751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4681ac27a0ecSDave Kleikamp 4682617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4683e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4684e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4685e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4686b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4687b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4688b31e1552SEric Sandeen "running e2fsck is recommended"); 4689469108ffSTheodore Tso 4690ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4691ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4692e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4693ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4694ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4695ed3654ebSTheodore Ts'o goto failed_mount; 4696ed3654ebSTheodore Ts'o } 4697dec214d0STahsin Erdogan 4698dec214d0STahsin Erdogan /* 4699dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4700dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4701dec214d0STahsin Erdogan */ 4702dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4703dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4704dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4705dec214d0STahsin Erdogan goto failed_mount; 4706dec214d0STahsin Erdogan } 4707ed3654ebSTheodore Ts'o } 4708ed3654ebSTheodore Ts'o 47092035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 47102035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 47112035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 47122035e776STheodore Ts'o "using the ext4 subsystem"); 47132035e776STheodore Ts'o else { 47140d9366d6SEric Sandeen /* 47150d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47160d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 47170d9366d6SEric Sandeen */ 47180d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47190d9366d6SEric Sandeen goto failed_mount; 47202035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 47212035e776STheodore Ts'o "to feature incompatibilities"); 47222035e776STheodore Ts'o goto failed_mount; 47232035e776STheodore Ts'o } 47242035e776STheodore Ts'o } 47252035e776STheodore Ts'o 47262035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 47272035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 47282035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 47292035e776STheodore Ts'o "using the ext4 subsystem"); 47302035e776STheodore Ts'o else { 47310d9366d6SEric Sandeen /* 47320d9366d6SEric Sandeen * If we're probing be silent, if this looks like 47330d9366d6SEric Sandeen * it's actually an ext4 filesystem. 47340d9366d6SEric Sandeen */ 47350d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 47360d9366d6SEric Sandeen goto failed_mount; 47372035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 47382035e776STheodore Ts'o "to feature incompatibilities"); 47392035e776STheodore Ts'o goto failed_mount; 47402035e776STheodore Ts'o } 47412035e776STheodore Ts'o } 47422035e776STheodore Ts'o 4743469108ffSTheodore Tso /* 4744ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4745ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4746ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4747ac27a0ecSDave Kleikamp */ 4748bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4749ac27a0ecSDave Kleikamp goto failed_mount; 4750a13fb1a4SEric Sandeen 47515b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 47525b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 47535b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 47545b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 47555b9554dcSTheodore Ts'o goto failed_mount; 47565b9554dcSTheodore Ts'o } 47575b9554dcSTheodore Ts'o 47587edfd85bSLukas Czerner if (dax_supported(sbi->s_daxdev, sb->s_bdev, blocksize, 0, 4759bdd3c50dSChristoph Hellwig bdev_nr_sectors(sb->s_bdev))) 4760a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4761a8ab6d38SIra Weiny 4762fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4763559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4764559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4765559db4c6SRoss Zwisler " that may contain inline data"); 4766361d24d4SEric Sandeen goto failed_mount; 4767559db4c6SRoss Zwisler } 4768a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 476924f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4770361d24d4SEric Sandeen "DAX unsupported by block device."); 4771361d24d4SEric Sandeen goto failed_mount; 477224f3478dSDan Williams } 4773923ae0ffSRoss Zwisler } 4774923ae0ffSRoss Zwisler 4775e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 47766ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 47776ddb2447STheodore Ts'o es->s_encryption_level); 47786ddb2447STheodore Ts'o goto failed_mount; 47796ddb2447STheodore Ts'o } 47806ddb2447STheodore Ts'o 4781ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4782afd09b61SAlexey Makhalov /* 4783afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4784afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4785afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4786afd09b61SAlexey Makhalov */ 4787afd09b61SAlexey Makhalov brelse(bh); 4788ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4789ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4790b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4791ce40733cSAneesh Kumar K.V blocksize); 4792afd09b61SAlexey Makhalov bh = NULL; 4793ac27a0ecSDave Kleikamp goto failed_mount; 4794ac27a0ecSDave Kleikamp } 4795ac27a0ecSDave Kleikamp 47967edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 479770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 47988394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 47998394a6abSzhangyi (F) if (IS_ERR(bh)) { 4800b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4801b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 48028394a6abSzhangyi (F) ret = PTR_ERR(bh); 48038394a6abSzhangyi (F) bh = NULL; 4804ac27a0ecSDave Kleikamp goto failed_mount; 4805ac27a0ecSDave Kleikamp } 48062716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4807ac27a0ecSDave Kleikamp sbi->s_es = es; 4808617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4809b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4810b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4811ac27a0ecSDave Kleikamp goto failed_mount; 4812ac27a0ecSDave Kleikamp } 4813ac27a0ecSDave Kleikamp } 4814ac27a0ecSDave Kleikamp 4815e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4816f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4817f287a1a5STheodore Ts'o has_huge_files); 4818f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4819ac27a0ecSDave Kleikamp 48200d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4821e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 48228fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 48230d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4824d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4825b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4826b31e1552SEric Sandeen "unsupported descriptor size %lu", 48270d1ee42fSAlexandre Ratchov sbi->s_desc_size); 48280d1ee42fSAlexandre Ratchov goto failed_mount; 48290d1ee42fSAlexandre Ratchov } 48300d1ee42fSAlexandre Ratchov } else 48310d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 48320b8e58a1SAndreas Dilger 4833ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4834ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 48350b8e58a1SAndreas Dilger 4836617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4837ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4838617ba13bSMingming Cao goto cantfind_ext4; 4839cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4840cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4841cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4842b9c538daSJosh Triplett sbi->s_inodes_per_group); 4843cd6bb35bSTheodore Ts'o goto failed_mount; 4844cd6bb35bSTheodore Ts'o } 4845ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4846ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 48470d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4848ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4849ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4850e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4851e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 48520b8e58a1SAndreas Dilger 4853ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4854ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4855ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4856e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4857f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4858f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4859f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4860f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4861f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4862bc98a42cSDavid Howells if (!sb_rdonly(sb)) 486323301410STheodore Ts'o es->s_flags |= 486423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4865f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4866f99b2589STheodore Ts'o #else 4867bc98a42cSDavid Howells if (!sb_rdonly(sb)) 486823301410STheodore Ts'o es->s_flags |= 486923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4870f99b2589STheodore Ts'o #endif 4871f99b2589STheodore Ts'o } 487223301410STheodore Ts'o } 4873ac27a0ecSDave Kleikamp 4874281b5995STheodore Ts'o /* Handle clustersize */ 4875281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4876ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4877281b5995STheodore Ts'o if (clustersize < blocksize) { 4878281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4879281b5995STheodore Ts'o "cluster size (%d) smaller than " 4880281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4881281b5995STheodore Ts'o goto failed_mount; 4882281b5995STheodore Ts'o } 4883281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4884281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4885281b5995STheodore Ts'o sbi->s_clusters_per_group = 4886281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4887281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4888281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4889281b5995STheodore Ts'o "#clusters per group too big: %lu", 4890281b5995STheodore Ts'o sbi->s_clusters_per_group); 4891281b5995STheodore Ts'o goto failed_mount; 4892281b5995STheodore Ts'o } 4893281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4894281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4895281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4896281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4897281b5995STheodore Ts'o sbi->s_blocks_per_group, 4898281b5995STheodore Ts'o sbi->s_clusters_per_group); 4899281b5995STheodore Ts'o goto failed_mount; 4900281b5995STheodore Ts'o } 4901281b5995STheodore Ts'o } else { 4902281b5995STheodore Ts'o if (clustersize != blocksize) { 4903bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4904bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4905bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4906bfe0a5f4STheodore Ts'o goto failed_mount; 4907281b5995STheodore Ts'o } 4908ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4909b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4910b31e1552SEric Sandeen "#blocks per group too big: %lu", 4911ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4912ac27a0ecSDave Kleikamp goto failed_mount; 4913ac27a0ecSDave Kleikamp } 4914281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4915281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4916281b5995STheodore Ts'o } 4917281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4918281b5995STheodore Ts'o 4919960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4920960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4921960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4922960fd856STheodore Ts'o 4923bf43d84bSEric Sandeen /* 4924bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4925bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4926bf43d84bSEric Sandeen */ 49275a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 492830ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 49295a9ae68aSDarrick J. Wong if (err) { 4930b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4931bf43d84bSEric Sandeen " too large to mount safely on this system"); 4932ac27a0ecSDave Kleikamp goto failed_mount; 4933ac27a0ecSDave Kleikamp } 4934ac27a0ecSDave Kleikamp 4935617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4936617ba13bSMingming Cao goto cantfind_ext4; 4937e7c95593SEric Sandeen 49380f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 49395513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 49400f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4941b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4942b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 49430f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 49440f2ddca6SFrom: Thiemo Nagel goto failed_mount; 49450f2ddca6SFrom: Thiemo Nagel } 49460f2ddca6SFrom: Thiemo Nagel 49474ec11028STheodore Ts'o /* 49484ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 49494ec11028STheodore Ts'o * of the filesystem. 49504ec11028STheodore Ts'o */ 49514ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4952b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4953b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4954e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 49554ec11028STheodore Ts'o ext4_blocks_count(es)); 4956e7c95593SEric Sandeen goto failed_mount; 4957e7c95593SEric Sandeen } 4958bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4959bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4960bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4961bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4962bfe0a5f4STheodore Ts'o goto failed_mount; 4963bfe0a5f4STheodore Ts'o } 4964bfe0a5f4STheodore Ts'o 4965bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4966bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4967bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4968bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 49694ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4970df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 49714ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4972df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 49734ec11028STheodore Ts'o ext4_blocks_count(es), 49744ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 49754ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 49764ec11028STheodore Ts'o goto failed_mount; 49774ec11028STheodore Ts'o } 4978bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4979fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4980fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 49819e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 49829e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 49839e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 49849e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 49859e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 49869e463084STheodore Ts'o ret = -EINVAL; 49879e463084STheodore Ts'o goto failed_mount; 49889e463084STheodore Ts'o } 4989617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4990617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 49913a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 49922ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 49933a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 49943a4b77cdSEryu Guan "first meta block group too large: %u " 49953a4b77cdSEryu Guan "(group descriptor block count %u)", 49963a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 49973a4b77cdSEryu Guan goto failed_mount; 49983a4b77cdSEryu Guan } 49993a4b77cdSEryu Guan } 50001d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 50011d0c3924STheodore Ts'o kvmalloc_array(db_count, 5002f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 50031d0c3924STheodore Ts'o GFP_KERNEL)); 5004ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 5005b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 50062cde417dSTheodore Ts'o ret = -ENOMEM; 5007ac27a0ecSDave Kleikamp goto failed_mount; 5008ac27a0ecSDave Kleikamp } 5009ac27a0ecSDave Kleikamp 5010705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 5011ac27a0ecSDave Kleikamp 501285c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 501385c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 501485c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 50155df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 501685c8f176SAndrew Perepechko } 501785c8f176SAndrew Perepechko 5018ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 50191d0c3924STheodore Ts'o struct buffer_head *bh; 50201d0c3924STheodore Ts'o 502170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 50228394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 50238394a6abSzhangyi (F) if (IS_ERR(bh)) { 5024b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5025b31e1552SEric Sandeen "can't read group descriptor %d", i); 5026ac27a0ecSDave Kleikamp db_count = i; 50278394a6abSzhangyi (F) ret = PTR_ERR(bh); 5028ac27a0ecSDave Kleikamp goto failed_mount2; 5029ac27a0ecSDave Kleikamp } 50301d0c3924STheodore Ts'o rcu_read_lock(); 50311d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 50321d0c3924STheodore Ts'o rcu_read_unlock(); 5033ac27a0ecSDave Kleikamp } 503444de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 5035829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 5036b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 50376a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 5038f9ae9cf5STheodore Ts'o goto failed_mount2; 5039ac27a0ecSDave Kleikamp } 5040772cb7c8SJose R. Santos 5041235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5042c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5043c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 504404496411STao Ma 5045a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5046eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5047ce7e010aSTheodore Ts'o goto failed_mount3; 5048ce7e010aSTheodore Ts'o 5049c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 505067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5051c9de560dSAlex Tomas 5052f9ae9cf5STheodore Ts'o /* 5053f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5054f9ae9cf5STheodore Ts'o */ 5055f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5056617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5057617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5058643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5059a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5060ffcc4182SEric Biggers #endif 5061c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5062c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5063c93d8f88SEric Biggers #endif 5064ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5065617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5066e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 50671fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5068262b4662SJan Kara else 5069262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5070689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5071ac27a0ecSDave Kleikamp #endif 507285787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5073f2fa2ffcSAneesh Kumar K.V 5074ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 50753b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5076ac27a0ecSDave Kleikamp 5077aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 5078aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 5079aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 5080aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 5081aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 5082aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 5083aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 50849b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 50859b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 5086aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 5087aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 50888016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 50898016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 50908016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 50918016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 50928016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 50938016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 50948016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 5095aa75f4d3SHarshad Shirwadkar 5096ac27a0ecSDave Kleikamp sb->s_root = NULL; 5097ac27a0ecSDave Kleikamp 5098ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 509902f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5100e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5101ac27a0ecSDave Kleikamp 5102bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5103c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 510450460fe8SDarrick J. Wong goto failed_mount3a; 5105c5e06d10SJohann Lombardi 5106ac27a0ecSDave Kleikamp /* 5107ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5108ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5109ac27a0ecSDave Kleikamp */ 5110e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 51117edfd85bSLukas Czerner err = ext4_load_journal(sb, es, ctx->journal_devnum); 51124753d8a2STheodore Ts'o if (err) 511350460fe8SDarrick J. Wong goto failed_mount3a; 5114bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5115e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5116b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5117b31e1552SEric Sandeen "suppressed and not mounted read-only"); 5118744692dcSJiaying Zhang goto failed_mount_wq; 5119ac27a0ecSDave Kleikamp } else { 51201e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 51211e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 51221e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51231e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 51241e381f60SDmitry Monakhov goto failed_mount_wq; 51251e381f60SDmitry Monakhov } 51261e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 51271e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51281e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 51291e381f60SDmitry Monakhov goto failed_mount_wq; 51301e381f60SDmitry Monakhov } 51311e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 51321e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51331e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 51341e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 51351e381f60SDmitry Monakhov goto failed_mount_wq; 51361e381f60SDmitry Monakhov } 51371e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 51381e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 51391e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51401e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 51411e381f60SDmitry Monakhov goto failed_mount_wq; 51421e381f60SDmitry Monakhov } 514350b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 51441e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5145fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5146995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 51470390131bSFrank Mayhar sbi->s_journal = NULL; 51480390131bSFrank Mayhar needs_recovery = 0; 51490390131bSFrank Mayhar goto no_journal; 5150ac27a0ecSDave Kleikamp } 5151ac27a0ecSDave Kleikamp 5152e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5153eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5154eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5155b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5156744692dcSJiaying Zhang goto failed_mount_wq; 5157eb40a09cSJose R. Santos } 5158eb40a09cSJose R. Santos 515925ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 516025ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 516125ed6e8aSDarrick J. Wong "feature set"); 516225ed6e8aSDarrick J. Wong goto failed_mount_wq; 5163d4da6c9cSLinus Torvalds } 5164818d276cSGirish Shilamkar 5165a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5166a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5167a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5168a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5169a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5170a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5171a1e5e465SHarshad Shirwadkar } 5172a1e5e465SHarshad Shirwadkar 5173ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5174ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5175ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5176ac27a0ecSDave Kleikamp case 0: 5177ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 517863f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 517963f57933SAndrew Morton * cope, else JOURNAL_DATA 518063f57933SAndrew Morton */ 5181dab291afSMingming Cao if (jbd2_journal_check_available_features 518227f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5183fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 518427f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 518527f394a7STyson Nottingham } else { 5186fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 518727f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 518827f394a7STyson Nottingham } 5189ac27a0ecSDave Kleikamp break; 5190ac27a0ecSDave Kleikamp 5191617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5192617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5193dab291afSMingming Cao if (!jbd2_journal_check_available_features 5194dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5195b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5196b31e1552SEric Sandeen "requested data journaling mode"); 5197744692dcSJiaying Zhang goto failed_mount_wq; 5198ac27a0ecSDave Kleikamp } 51995a150bdeSGustavo A. R. Silva break; 5200ac27a0ecSDave Kleikamp default: 5201ac27a0ecSDave Kleikamp break; 5202ac27a0ecSDave Kleikamp } 5203ab04df78SJan Kara 5204ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5205ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5206ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5207ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5208ab04df78SJan Kara goto failed_mount_wq; 5209ab04df78SJan Kara } 5210ab04df78SJan Kara 52117edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 5212ac27a0ecSDave Kleikamp 5213342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5214afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5215342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5216afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 521718aadd47SBobi Jam 5218ce7e010aSTheodore Ts'o no_journal: 5219cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 522047387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 522147387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5222cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5223cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 52249c191f70ST Makphaibulchoke goto failed_mount_wq; 52259c191f70ST Makphaibulchoke } 52269c191f70ST Makphaibulchoke 5227dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5228dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5229dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5230dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5231dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5232dec214d0STahsin Erdogan goto failed_mount_wq; 5233dec214d0STahsin Erdogan } 5234dec214d0STahsin Erdogan } 5235cdb7ee4cSTahsin Erdogan } 5236dec214d0STahsin Erdogan 5237c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5238c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5239c93d8f88SEric Biggers goto failed_mount_wq; 5240c93d8f88SEric Biggers } 5241c93d8f88SEric Biggers 5242bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 5243e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 5244e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 52454392fbc4SJan Kara ext4_commit_super(sb); 52466ddb2447STheodore Ts'o } 52476ddb2447STheodore Ts'o 5248fd89d5f2STejun Heo /* 5249952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5250952fc18eSTheodore Ts'o * superblock if present. 5251952fc18eSTheodore Ts'o */ 5252952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 5253952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 5254952fc18eSTheodore Ts'o else { 525507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 525607aa2ea1SLukas Czerner if (err) 5257952fc18eSTheodore Ts'o goto failed_mount_wq; 5258952fc18eSTheodore Ts'o } 5259952fc18eSTheodore Ts'o 5260952fc18eSTheodore Ts'o /* 5261fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5262fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5263fd89d5f2STejun Heo */ 52642e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 52652e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 52662e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 52672e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 526807aa2ea1SLukas Czerner ret = -ENOMEM; 52692e8fa54eSJan Kara goto failed_mount4; 52702e8fa54eSJan Kara } 52712e8fa54eSJan Kara 5272ac27a0ecSDave Kleikamp /* 5273dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5274ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5275ac27a0ecSDave Kleikamp */ 5276ac27a0ecSDave Kleikamp 52778a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 52781d1fe1eeSDavid Howells if (IS_ERR(root)) { 5279b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 52801d1fe1eeSDavid Howells ret = PTR_ERR(root); 528132a9bb57SManish Katiyar root = NULL; 5282ac27a0ecSDave Kleikamp goto failed_mount4; 5283ac27a0ecSDave Kleikamp } 5284ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5285b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 528694bf608aSAl Viro iput(root); 5287ac27a0ecSDave Kleikamp goto failed_mount4; 5288ac27a0ecSDave Kleikamp } 5289b886ee3eSGabriel Krisman Bertazi 529048fde701SAl Viro sb->s_root = d_make_root(root); 52911d1fe1eeSDavid Howells if (!sb->s_root) { 5292b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 52931d1fe1eeSDavid Howells ret = -ENOMEM; 52941d1fe1eeSDavid Howells goto failed_mount4; 52951d1fe1eeSDavid Howells } 5296ac27a0ecSDave Kleikamp 5297c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5298c89128a0SJaegeuk Kim if (ret == -EROFS) { 52991751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5300c89128a0SJaegeuk Kim ret = 0; 5301c89128a0SJaegeuk Kim } else if (ret) 5302c89128a0SJaegeuk Kim goto failed_mount4a; 5303ef7f3835SKalpak Shah 5304b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 530527dd4385SLukas Czerner 53060f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 53076fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 53086fd058f7STheodore Ts'o if (err) { 5309b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5310fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5311f9ae9cf5STheodore Ts'o goto failed_mount4a; 5312f9ae9cf5STheodore Ts'o } 53130f5bde1dSJan Kara } 53148016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5315f9ae9cf5STheodore Ts'o 5316f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5317196e402aSHarshad Shirwadkar 5318196e402aSHarshad Shirwadkar /* 5319196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5320196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5321196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5322196e402aSHarshad Shirwadkar */ 53237edfd85bSLukas Czerner if (ctx->mb_optimize_scan == 1) 5324196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 53257edfd85bSLukas Czerner else if (ctx->mb_optimize_scan == 0) 5326196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5327196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5328196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5329196e402aSHarshad Shirwadkar 5330f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5331f9ae9cf5STheodore Ts'o if (err) { 5332f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5333f9ae9cf5STheodore Ts'o err); 5334dcf2d804STao Ma goto failed_mount5; 5335c2774d84SAneesh Kumar K.V } 5336c2774d84SAneesh Kumar K.V 5337027f14f5STheodore Ts'o /* 5338027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5339027f14f5STheodore Ts'o * mballoc is initialized 5340027f14f5STheodore Ts'o */ 5341027f14f5STheodore Ts'o if (sbi->s_journal) 5342027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5343027f14f5STheodore Ts'o ext4_journal_commit_callback; 5344027f14f5STheodore Ts'o 5345d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5346d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5347d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5348908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5349908c7f19STejun Heo GFP_KERNEL); 5350d5e03cbbSTheodore Ts'o if (!err) { 5351d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5352d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5353908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5354908c7f19STejun Heo GFP_KERNEL); 5355d5e03cbbSTheodore Ts'o } 5356b2bbb92fSJan Kara /* 5357b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5358b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5359b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5360b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5361b2bbb92fSJan Kara * after it is mounted can fail. 5362b2bbb92fSJan Kara */ 5363b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5364d5e03cbbSTheodore Ts'o if (!err) 5365d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5366908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5367d5e03cbbSTheodore Ts'o if (!err) 5368908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5369908c7f19STejun Heo GFP_KERNEL); 5370c8585c6fSDaeho Jeong if (!err) 5371efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5372efc61345SEric Whitney GFP_KERNEL); 5373efc61345SEric Whitney if (!err) 5374bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5375c8585c6fSDaeho Jeong 5376d5e03cbbSTheodore Ts'o if (err) { 5377d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5378d5e03cbbSTheodore Ts'o goto failed_mount6; 5379d5e03cbbSTheodore Ts'o } 5380d5e03cbbSTheodore Ts'o 5381e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5382d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5383d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5384d5e03cbbSTheodore Ts'o "unable to initialize " 5385d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 53868f6840c4SYang Yingliang ret = -ENOMEM; 5387d5e03cbbSTheodore Ts'o goto failed_mount6; 5388d5e03cbbSTheodore Ts'o } 5389d5e03cbbSTheodore Ts'o 5390bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5391bfff6873SLukas Czerner if (err) 5392dcf2d804STao Ma goto failed_mount6; 5393bfff6873SLukas Czerner 5394b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5395dcf2d804STao Ma if (err) 5396dcf2d804STao Ma goto failed_mount7; 53973197ebdbSTheodore Ts'o 539802f310fcSJan Kara err = ext4_init_orphan_info(sb); 539902f310fcSJan Kara if (err) 540002f310fcSJan Kara goto failed_mount8; 54019b2ff357SJan Kara #ifdef CONFIG_QUOTA 54029b2ff357SJan Kara /* Enable quota usage during mount. */ 5403bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 54049b2ff357SJan Kara err = ext4_enable_quotas(sb); 54059b2ff357SJan Kara if (err) 540602f310fcSJan Kara goto failed_mount9; 54079b2ff357SJan Kara } 54089b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 54099b2ff357SJan Kara 5410bc71726cSzhangyi (F) /* 5411bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5412bc71726cSzhangyi (F) * used to detect the metadata async write error. 5413bc71726cSzhangyi (F) */ 5414bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5415bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5416bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5417bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5418617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5419617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5420617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 54210390131bSFrank Mayhar if (needs_recovery) { 5422b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 542311215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 542411215630SJan Kara if (err) 542502f310fcSJan Kara goto failed_mount9; 54260390131bSFrank Mayhar } 54270390131bSFrank Mayhar 542879add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 542979add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 543079add3a3SLukas Czerner if (!blk_queue_discard(q)) 543179add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 543279add3a3SLukas Czerner "mounting with \"discard\" option, but " 543379add3a3SLukas Czerner "the device does not support discard"); 543479add3a3SLukas Czerner } 543579add3a3SLukas Czerner 543666e61a9eSTheodore Ts'o if (es->s_error_count) 543766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5438ac27a0ecSDave Kleikamp 5439efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5440efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5441efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5442efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 54431cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 54441cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5445efbed4dcSTheodore Ts'o 5446ac27a0ecSDave Kleikamp return 0; 5447ac27a0ecSDave Kleikamp 5448617ba13bSMingming Cao cantfind_ext4: 5449ac27a0ecSDave Kleikamp if (!silent) 5450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5451ac27a0ecSDave Kleikamp goto failed_mount; 5452ac27a0ecSDave Kleikamp 545302f310fcSJan Kara failed_mount9: 545402f310fcSJan Kara ext4_release_orphan_info(sb); 545572ba7450STheodore Ts'o failed_mount8: 5456ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5457cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5458dcf2d804STao Ma failed_mount7: 5459dcf2d804STao Ma ext4_unregister_li_request(sb); 5460dcf2d804STao Ma failed_mount6: 5461f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 54627c990728SSuraj Jitindar Singh rcu_read_lock(); 54637c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 54647c990728SSuraj Jitindar Singh if (flex_groups) { 54657c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 54667c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 54677c990728SSuraj Jitindar Singh kvfree(flex_groups); 54687c990728SSuraj Jitindar Singh } 54697c990728SSuraj Jitindar Singh rcu_read_unlock(); 5470d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5471d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5472d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5473d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5474efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5475bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 547600764937SAzat Khuzhin failed_mount5: 5477f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5478f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5479f9ae9cf5STheodore Ts'o failed_mount4a: 548094bf608aSAl Viro dput(sb->s_root); 548132a9bb57SManish Katiyar sb->s_root = NULL; 548294bf608aSAl Viro failed_mount4: 5483b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 54842e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 54852e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 54864c0425ffSMingming Cao failed_mount_wq: 5487dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5488dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 548950c15df6SChengguang Xu 549047387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 549147387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 549250c15df6SChengguang Xu 54930390131bSFrank Mayhar if (sbi->s_journal) { 5494bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5495bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5496dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 549747b4a50bSJan Kara sbi->s_journal = NULL; 54980390131bSFrank Mayhar } 549950460fe8SDarrick J. Wong failed_mount3a: 5500d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5501eb68d0e2SZheng Liu failed_mount3: 5502bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5503c92dc856SJan Kara flush_work(&sbi->s_error_work); 55042a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5505618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5506ac27a0ecSDave Kleikamp failed_mount2: 55071d0c3924STheodore Ts'o rcu_read_lock(); 55081d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5509ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 55101d0c3924STheodore Ts'o brelse(group_desc[i]); 55111d0c3924STheodore Ts'o kvfree(group_desc); 55121d0c3924STheodore Ts'o rcu_read_unlock(); 5513ac27a0ecSDave Kleikamp failed_mount: 55140441984aSDarrick J. Wong if (sbi->s_chksum_driver) 55150441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5516c83ad55eSGabriel Krisman Bertazi 5517c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5518f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5519c83ad55eSGabriel Krisman Bertazi #endif 5520c83ad55eSGabriel Krisman Bertazi 5521ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5522a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 55230ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5524ac27a0ecSDave Kleikamp #endif 5525ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5526afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5527ac27a0ecSDave Kleikamp brelse(bh); 5528afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5529ac27a0ecSDave Kleikamp out_fail: 5530ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 553107aa2ea1SLukas Czerner return err ? err : ret; 5532ac27a0ecSDave Kleikamp } 5533ac27a0ecSDave Kleikamp 5534cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 55357edfd85bSLukas Czerner { 5536cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 55377edfd85bSLukas Czerner struct ext4_sb_info *sbi; 55387edfd85bSLukas Czerner const char *descr; 5539cebe85d5SLukas Czerner int ret; 55407edfd85bSLukas Czerner 5541cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5542cebe85d5SLukas Czerner if (!sbi) 5543cebe85d5SLukas Czerner ret = -ENOMEM; 5544cebe85d5SLukas Czerner 5545cebe85d5SLukas Czerner fc->s_fs_info = sbi; 55467edfd85bSLukas Czerner 55477edfd85bSLukas Czerner /* Cleanup superblock name */ 55487edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 55497edfd85bSLukas Czerner 55507edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5551cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5552cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 55537edfd85bSLukas Czerner 5554960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 55557edfd85bSLukas Czerner if (ret < 0) 55567edfd85bSLukas Czerner goto free_sbi; 55577edfd85bSLukas Czerner 5558cebe85d5SLukas Czerner if (sbi->s_journal) { 55597edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 55607edfd85bSLukas Czerner descr = " journalled data mode"; 55617edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 55627edfd85bSLukas Czerner descr = " ordered data mode"; 55637edfd85bSLukas Czerner else 55647edfd85bSLukas Czerner descr = " writeback data mode"; 55657edfd85bSLukas Czerner } else 55667edfd85bSLukas Czerner descr = "out journal"; 55677edfd85bSLukas Czerner 55687edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 55697edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5570cebe85d5SLukas Czerner "Quota mode: %s.", descr, ext4_quota_mode(sb)); 55717edfd85bSLukas Czerner 55727edfd85bSLukas Czerner return 0; 5573cebe85d5SLukas Czerner 55747edfd85bSLukas Czerner free_sbi: 55757edfd85bSLukas Czerner ext4_free_sbi(sbi); 5576cebe85d5SLukas Czerner fc->s_fs_info = NULL; 55777edfd85bSLukas Czerner return ret; 55787edfd85bSLukas Czerner } 55797edfd85bSLukas Czerner 5580cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5581cebe85d5SLukas Czerner { 5582cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5583cebe85d5SLukas Czerner } 5584cebe85d5SLukas Czerner 5585ac27a0ecSDave Kleikamp /* 5586ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5587ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5588ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5589ac27a0ecSDave Kleikamp */ 5590617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5591ac27a0ecSDave Kleikamp { 5592617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5593ac27a0ecSDave Kleikamp 5594ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 559530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 559630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 55976866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5598ac27a0ecSDave Kleikamp 5599a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5600ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5601dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5602ac27a0ecSDave Kleikamp else 5603dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 56045bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 56055bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 56065bf5683aSHidehiro Kawai else 56075bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5608a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5609ac27a0ecSDave Kleikamp } 5610ac27a0ecSDave Kleikamp 5611c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5612ac27a0ecSDave Kleikamp unsigned int journal_inum) 5613ac27a0ecSDave Kleikamp { 5614ac27a0ecSDave Kleikamp struct inode *journal_inode; 5615ac27a0ecSDave Kleikamp 5616c6cb7e77SEric Whitney /* 5617c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5618c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5619c6cb7e77SEric Whitney * will try to delete it. 5620c6cb7e77SEric Whitney */ 56218a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 56221d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5623b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5624ac27a0ecSDave Kleikamp return NULL; 5625ac27a0ecSDave Kleikamp } 5626ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5627ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5628ac27a0ecSDave Kleikamp iput(journal_inode); 5629b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5630ac27a0ecSDave Kleikamp return NULL; 5631ac27a0ecSDave Kleikamp } 5632ac27a0ecSDave Kleikamp 5633e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5634ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 56351d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5636b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5637ac27a0ecSDave Kleikamp iput(journal_inode); 5638ac27a0ecSDave Kleikamp return NULL; 5639ac27a0ecSDave Kleikamp } 5640c6cb7e77SEric Whitney return journal_inode; 5641c6cb7e77SEric Whitney } 5642c6cb7e77SEric Whitney 5643c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5644c6cb7e77SEric Whitney unsigned int journal_inum) 5645c6cb7e77SEric Whitney { 5646c6cb7e77SEric Whitney struct inode *journal_inode; 5647c6cb7e77SEric Whitney journal_t *journal; 5648c6cb7e77SEric Whitney 564911215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 565011215630SJan Kara return NULL; 5651c6cb7e77SEric Whitney 5652c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5653c6cb7e77SEric Whitney if (!journal_inode) 5654c6cb7e77SEric Whitney return NULL; 5655ac27a0ecSDave Kleikamp 5656dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5657ac27a0ecSDave Kleikamp if (!journal) { 5658b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5659ac27a0ecSDave Kleikamp iput(journal_inode); 5660ac27a0ecSDave Kleikamp return NULL; 5661ac27a0ecSDave Kleikamp } 5662ac27a0ecSDave Kleikamp journal->j_private = sb; 5663617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5664ac27a0ecSDave Kleikamp return journal; 5665ac27a0ecSDave Kleikamp } 5666ac27a0ecSDave Kleikamp 5667617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5668ac27a0ecSDave Kleikamp dev_t j_dev) 5669ac27a0ecSDave Kleikamp { 5670ac27a0ecSDave Kleikamp struct buffer_head *bh; 5671ac27a0ecSDave Kleikamp journal_t *journal; 5672617ba13bSMingming Cao ext4_fsblk_t start; 5673617ba13bSMingming Cao ext4_fsblk_t len; 5674ac27a0ecSDave Kleikamp int hblock, blocksize; 5675617ba13bSMingming Cao ext4_fsblk_t sb_block; 5676ac27a0ecSDave Kleikamp unsigned long offset; 5677617ba13bSMingming Cao struct ext4_super_block *es; 5678ac27a0ecSDave Kleikamp struct block_device *bdev; 5679ac27a0ecSDave Kleikamp 568011215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 568111215630SJan Kara return NULL; 56820390131bSFrank Mayhar 5683b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5684ac27a0ecSDave Kleikamp if (bdev == NULL) 5685ac27a0ecSDave Kleikamp return NULL; 5686ac27a0ecSDave Kleikamp 5687ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5688e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5689ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5691b31e1552SEric Sandeen "blocksize too small for journal device"); 5692ac27a0ecSDave Kleikamp goto out_bdev; 5693ac27a0ecSDave Kleikamp } 5694ac27a0ecSDave Kleikamp 5695617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5696617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5697ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5698ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5699b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5700b31e1552SEric Sandeen "external journal"); 5701ac27a0ecSDave Kleikamp goto out_bdev; 5702ac27a0ecSDave Kleikamp } 5703ac27a0ecSDave Kleikamp 57042716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5705617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5706ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5707617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5708b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5709b31e1552SEric Sandeen "bad superblock"); 5710ac27a0ecSDave Kleikamp brelse(bh); 5711ac27a0ecSDave Kleikamp goto out_bdev; 5712ac27a0ecSDave Kleikamp } 5713ac27a0ecSDave Kleikamp 5714df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5715df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5716df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5717df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5718df4763beSDarrick J. Wong "corrupt superblock"); 5719df4763beSDarrick J. Wong brelse(bh); 5720df4763beSDarrick J. Wong goto out_bdev; 5721df4763beSDarrick J. Wong } 5722df4763beSDarrick J. Wong 5723617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5724b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5725ac27a0ecSDave Kleikamp brelse(bh); 5726ac27a0ecSDave Kleikamp goto out_bdev; 5727ac27a0ecSDave Kleikamp } 5728ac27a0ecSDave Kleikamp 5729bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5730ac27a0ecSDave Kleikamp start = sb_block + 1; 5731ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5732ac27a0ecSDave Kleikamp 5733dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5734ac27a0ecSDave Kleikamp start, len, blocksize); 5735ac27a0ecSDave Kleikamp if (!journal) { 5736b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5737ac27a0ecSDave Kleikamp goto out_bdev; 5738ac27a0ecSDave Kleikamp } 5739ac27a0ecSDave Kleikamp journal->j_private = sb; 57402d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5741b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5742ac27a0ecSDave Kleikamp goto out_journal; 5743ac27a0ecSDave Kleikamp } 5744ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5745b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5746b31e1552SEric Sandeen "user (unsupported) - %d", 5747ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5748ac27a0ecSDave Kleikamp goto out_journal; 5749ac27a0ecSDave Kleikamp } 5750ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5751617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5752ac27a0ecSDave Kleikamp return journal; 57530b8e58a1SAndreas Dilger 5754ac27a0ecSDave Kleikamp out_journal: 5755dab291afSMingming Cao jbd2_journal_destroy(journal); 5756ac27a0ecSDave Kleikamp out_bdev: 5757617ba13bSMingming Cao ext4_blkdev_put(bdev); 5758ac27a0ecSDave Kleikamp return NULL; 5759ac27a0ecSDave Kleikamp } 5760ac27a0ecSDave Kleikamp 5761617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5762617ba13bSMingming Cao struct ext4_super_block *es, 5763ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5764ac27a0ecSDave Kleikamp { 5765ac27a0ecSDave Kleikamp journal_t *journal; 5766ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5767ac27a0ecSDave Kleikamp dev_t journal_dev; 5768ac27a0ecSDave Kleikamp int err = 0; 5769ac27a0ecSDave Kleikamp int really_read_only; 5770273108faSLukas Czerner int journal_dev_ro; 5771ac27a0ecSDave Kleikamp 577211215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 577311215630SJan Kara return -EFSCORRUPTED; 57740390131bSFrank Mayhar 5775ac27a0ecSDave Kleikamp if (journal_devnum && 5776ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5777b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5778b31e1552SEric Sandeen "numbers have changed"); 5779ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5780ac27a0ecSDave Kleikamp } else 5781ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5782ac27a0ecSDave Kleikamp 5783273108faSLukas Czerner if (journal_inum && journal_dev) { 5784273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5785273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5786273108faSLukas Czerner return -EINVAL; 5787273108faSLukas Czerner } 5788273108faSLukas Czerner 5789273108faSLukas Czerner if (journal_inum) { 5790273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5791273108faSLukas Czerner if (!journal) 5792273108faSLukas Czerner return -EINVAL; 5793273108faSLukas Czerner } else { 5794273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5795273108faSLukas Czerner if (!journal) 5796273108faSLukas Czerner return -EINVAL; 5797273108faSLukas Czerner } 5798273108faSLukas Czerner 5799273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5800273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5801273108faSLukas Czerner 5802273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5803273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5804273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5805273108faSLukas Czerner err = -EROFS; 5806273108faSLukas Czerner goto err_out; 5807273108faSLukas Czerner } 5808ac27a0ecSDave Kleikamp 5809ac27a0ecSDave Kleikamp /* 5810ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5811ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5812ac27a0ecSDave Kleikamp * can get read-write access to the device. 5813ac27a0ecSDave Kleikamp */ 5814e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5815bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5816b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5817b31e1552SEric Sandeen "required on readonly filesystem"); 5818ac27a0ecSDave Kleikamp if (really_read_only) { 5819b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5820d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5821d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5822273108faSLukas Czerner err = -EROFS; 5823273108faSLukas Czerner goto err_out; 5824ac27a0ecSDave Kleikamp } 5825b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5826b31e1552SEric Sandeen "be enabled during recovery"); 5827ac27a0ecSDave Kleikamp } 5828ac27a0ecSDave Kleikamp } 5829ac27a0ecSDave Kleikamp 583090576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5831b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 58324776004fSTheodore Ts'o 5833e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5834dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 58351c13d5c0STheodore Ts'o if (!err) { 58361c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 58371c13d5c0STheodore Ts'o if (save) 58381c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 58391c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5840dab291afSMingming Cao err = jbd2_journal_load(journal); 58411c13d5c0STheodore Ts'o if (save) 58421c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 58431c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 58441c13d5c0STheodore Ts'o kfree(save); 58451c13d5c0STheodore Ts'o } 5846ac27a0ecSDave Kleikamp 5847ac27a0ecSDave Kleikamp if (err) { 5848b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5849273108faSLukas Czerner goto err_out; 5850ac27a0ecSDave Kleikamp } 5851ac27a0ecSDave Kleikamp 5852617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 585311215630SJan Kara err = ext4_clear_journal_err(sb, es); 585411215630SJan Kara if (err) { 585511215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 585611215630SJan Kara jbd2_journal_destroy(journal); 585711215630SJan Kara return err; 585811215630SJan Kara } 5859ac27a0ecSDave Kleikamp 5860c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5861ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5862ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5863ac27a0ecSDave Kleikamp 5864ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 58654392fbc4SJan Kara ext4_commit_super(sb); 5866ac27a0ecSDave Kleikamp } 5867ac27a0ecSDave Kleikamp 5868ac27a0ecSDave Kleikamp return 0; 5869273108faSLukas Czerner 5870273108faSLukas Czerner err_out: 5871273108faSLukas Czerner jbd2_journal_destroy(journal); 5872273108faSLukas Czerner return err; 5873ac27a0ecSDave Kleikamp } 5874ac27a0ecSDave Kleikamp 58752d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 58762d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5877ac27a0ecSDave Kleikamp { 5878c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5879e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5880e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5881ac27a0ecSDave Kleikamp 588205c2c00fSJan Kara lock_buffer(sbh); 5883a17712c8SJon Derrick /* 588471290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 588571290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 588671290b36STheodore Ts'o * write time when we are mounting the root file system 588771290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 588871290b36STheodore Ts'o * for people who are east of GMT and who make their clock 588971290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 589071290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 589171290b36STheodore Ts'o * to complain and force a full file system check. 589271290b36STheodore Ts'o */ 58931751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 58946a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5895afc32f7eSTheodore Ts'o es->s_kbytes_written = 5896e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 58978446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5898e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5899e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 590057042651STheodore Ts'o ext4_free_blocks_count_set(es, 5901e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5902e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5903e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 59047f93cff9STheodore Ts'o es->s_free_inodes_count = 59057f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5906e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5907c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5908c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5909c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5910c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5911c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5912c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5913c92dc856SJan Kara &es->s_first_error_time_hi, 5914c92dc856SJan Kara sbi->s_first_error_time); 5915c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5916c92dc856SJan Kara sizeof(es->s_first_error_func)); 5917c92dc856SJan Kara es->s_first_error_line = 5918c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5919c92dc856SJan Kara es->s_first_error_ino = 5920c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5921c92dc856SJan Kara es->s_first_error_block = 5922c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5923c92dc856SJan Kara es->s_first_error_errcode = 5924c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5925c92dc856SJan Kara } 5926c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5927c92dc856SJan Kara &es->s_last_error_time_hi, 5928c92dc856SJan Kara sbi->s_last_error_time); 5929c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5930c92dc856SJan Kara sizeof(es->s_last_error_func)); 5931c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5932c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5933c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5934c92dc856SJan Kara es->s_last_error_errcode = 5935c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5936c92dc856SJan Kara /* 5937c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5938c92dc856SJan Kara * started already 5939c92dc856SJan Kara */ 5940c92dc856SJan Kara if (!es->s_error_count) 5941c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5942c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5943c92dc856SJan Kara sbi->s_add_error_count = 0; 5944c92dc856SJan Kara } 5945c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5946c92dc856SJan Kara 594706db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 59482d01ddc8SJan Kara unlock_buffer(sbh); 59492d01ddc8SJan Kara } 59502d01ddc8SJan Kara 59512d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 59522d01ddc8SJan Kara { 59532d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 59542d01ddc8SJan Kara int error = 0; 59552d01ddc8SJan Kara 5956f88f1466SFengnan Chang if (!sbh) 5957f88f1466SFengnan Chang return -EINVAL; 5958f88f1466SFengnan Chang if (block_device_ejected(sb)) 5959f88f1466SFengnan Chang return -ENODEV; 59602d01ddc8SJan Kara 59612d01ddc8SJan Kara ext4_update_super(sb); 59622d01ddc8SJan Kara 5963e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 59644743f839SPranay Kr. Srivastava /* 59654743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 59664743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 59674743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 59684743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 59694743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 59704743f839SPranay Kr. Srivastava * write and hope for the best. 59714743f839SPranay Kr. Srivastava */ 59724743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 59734743f839SPranay Kr. Srivastava "superblock detected"); 59744743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 59754743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 59764743f839SPranay Kr. Srivastava } 59772d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 5978ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5979564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 598000473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5981c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5982b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5983b31e1552SEric Sandeen "superblock"); 5984914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5985914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5986914258bfSTheodore Ts'o } 5987c4be0c1dSTakashi Sato return error; 5988ac27a0ecSDave Kleikamp } 5989ac27a0ecSDave Kleikamp 5990ac27a0ecSDave Kleikamp /* 5991ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5992ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5993ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5994ac27a0ecSDave Kleikamp */ 599511215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5996617ba13bSMingming Cao struct ext4_super_block *es) 5997ac27a0ecSDave Kleikamp { 599811215630SJan Kara int err; 5999617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6000ac27a0ecSDave Kleikamp 6001e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 600211215630SJan Kara if (journal != NULL) { 600311215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 600411215630SJan Kara "mounted!"); 600511215630SJan Kara return -EFSCORRUPTED; 600611215630SJan Kara } 600711215630SJan Kara return 0; 60080390131bSFrank Mayhar } 6009dab291afSMingming Cao jbd2_journal_lock_updates(journal); 601001d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 601111215630SJan Kara if (err < 0) 60127ffe1ea8SHidehiro Kawai goto out; 60137ffe1ea8SHidehiro Kawai 601402f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 601502f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 601602f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 601702f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 601802f310fcSJan Kara err = -EFSCORRUPTED; 601902f310fcSJan Kara goto out; 602002f310fcSJan Kara } 6021e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 602202f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 60234392fbc4SJan Kara ext4_commit_super(sb); 6024ac27a0ecSDave Kleikamp } 60257ffe1ea8SHidehiro Kawai out: 6026dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 602711215630SJan Kara return err; 6028ac27a0ecSDave Kleikamp } 6029ac27a0ecSDave Kleikamp 6030ac27a0ecSDave Kleikamp /* 6031ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6032ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6033ac27a0ecSDave Kleikamp * main filesystem now. 6034ac27a0ecSDave Kleikamp */ 603511215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6036617ba13bSMingming Cao struct ext4_super_block *es) 6037ac27a0ecSDave Kleikamp { 6038ac27a0ecSDave Kleikamp journal_t *journal; 6039ac27a0ecSDave Kleikamp int j_errno; 6040ac27a0ecSDave Kleikamp const char *errstr; 6041ac27a0ecSDave Kleikamp 604211215630SJan Kara if (!ext4_has_feature_journal(sb)) { 604311215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 604411215630SJan Kara return -EFSCORRUPTED; 604511215630SJan Kara } 60460390131bSFrank Mayhar 6047617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6048ac27a0ecSDave Kleikamp 6049ac27a0ecSDave Kleikamp /* 6050ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6051617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6052ac27a0ecSDave Kleikamp */ 6053ac27a0ecSDave Kleikamp 6054dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6055ac27a0ecSDave Kleikamp if (j_errno) { 6056ac27a0ecSDave Kleikamp char nbuf[16]; 6057ac27a0ecSDave Kleikamp 6058617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 605912062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6060ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 606112062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6062ac27a0ecSDave Kleikamp 6063617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6064617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 60654392fbc4SJan Kara ext4_commit_super(sb); 6066ac27a0ecSDave Kleikamp 6067dab291afSMingming Cao jbd2_journal_clear_err(journal); 6068d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6069ac27a0ecSDave Kleikamp } 607011215630SJan Kara return 0; 6071ac27a0ecSDave Kleikamp } 6072ac27a0ecSDave Kleikamp 6073ac27a0ecSDave Kleikamp /* 6074ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6075ac27a0ecSDave Kleikamp * and wait on the commit. 6076ac27a0ecSDave Kleikamp */ 6077617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6078ac27a0ecSDave Kleikamp { 6079ac27a0ecSDave Kleikamp journal_t *journal; 6080ac27a0ecSDave Kleikamp 6081bc98a42cSDavid Howells if (sb_rdonly(sb)) 6082ac27a0ecSDave Kleikamp return 0; 6083ac27a0ecSDave Kleikamp 6084617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6085b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6086ac27a0ecSDave Kleikamp } 6087ac27a0ecSDave Kleikamp 6088617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6089ac27a0ecSDave Kleikamp { 609014ce0cb4STheodore Ts'o int ret = 0; 60919eddacf9SJan Kara tid_t target; 609206a407f1SDmitry Monakhov bool needs_barrier = false; 60938d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6094ac27a0ecSDave Kleikamp 609549598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 60960db1ff22STheodore Ts'o return 0; 60970db1ff22STheodore Ts'o 60989bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 60992e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6100a1177825SJan Kara /* 6101a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6102a1177825SJan Kara * no dirty dquots 6103a1177825SJan Kara */ 6104a1177825SJan Kara dquot_writeback_dquots(sb, -1); 610506a407f1SDmitry Monakhov /* 610606a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 610706a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 610806a407f1SDmitry Monakhov * transaction_commit will do it for us. 610906a407f1SDmitry Monakhov */ 6110bda32530STheodore Ts'o if (sbi->s_journal) { 611106a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 611206a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 611306a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 611406a407f1SDmitry Monakhov needs_barrier = true; 611506a407f1SDmitry Monakhov 61168d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6117ac27a0ecSDave Kleikamp if (wait) 6118bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6119bda32530STheodore Ts'o target); 61200390131bSFrank Mayhar } 6121bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6122bda32530STheodore Ts'o needs_barrier = true; 612306a407f1SDmitry Monakhov if (needs_barrier) { 612406a407f1SDmitry Monakhov int err; 6125c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 612606a407f1SDmitry Monakhov if (!ret) 612706a407f1SDmitry Monakhov ret = err; 612806a407f1SDmitry Monakhov } 612906a407f1SDmitry Monakhov 613006a407f1SDmitry Monakhov return ret; 613106a407f1SDmitry Monakhov } 613206a407f1SDmitry Monakhov 6133ac27a0ecSDave Kleikamp /* 6134ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6135ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6136be4f27d3SYongqiang Yang * 6137be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 61388e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 61398e8ad8a5SJan Kara * modifications. 6140ac27a0ecSDave Kleikamp */ 6141c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6142ac27a0ecSDave Kleikamp { 6143c4be0c1dSTakashi Sato int error = 0; 6144c4be0c1dSTakashi Sato journal_t *journal; 6145ac27a0ecSDave Kleikamp 6146bc98a42cSDavid Howells if (sb_rdonly(sb)) 61479ca92389STheodore Ts'o return 0; 61489ca92389STheodore Ts'o 6149c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6150ac27a0ecSDave Kleikamp 6151bb044576STheodore Ts'o if (journal) { 6152ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6153dab291afSMingming Cao jbd2_journal_lock_updates(journal); 61547ffe1ea8SHidehiro Kawai 61557ffe1ea8SHidehiro Kawai /* 6156bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6157bb044576STheodore Ts'o * flush the journal. 61587ffe1ea8SHidehiro Kawai */ 615901d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 61606b0310fbSEric Sandeen if (error < 0) 61616b0310fbSEric Sandeen goto out; 6162ac27a0ecSDave Kleikamp 6163ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6164e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 616502f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 616602f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6167c642dc9eSEric Sandeen } 6168c642dc9eSEric Sandeen 61694392fbc4SJan Kara error = ext4_commit_super(sb); 61706b0310fbSEric Sandeen out: 6171bb044576STheodore Ts'o if (journal) 61728e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6173bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 61746b0310fbSEric Sandeen return error; 6175ac27a0ecSDave Kleikamp } 6176ac27a0ecSDave Kleikamp 6177ac27a0ecSDave Kleikamp /* 6178ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6179ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6180ac27a0ecSDave Kleikamp */ 6181c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6182ac27a0ecSDave Kleikamp { 6183bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 61849ca92389STheodore Ts'o return 0; 61859ca92389STheodore Ts'o 6186c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 61879ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6188e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 618902f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 619002f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6191c642dc9eSEric Sandeen } 6192c642dc9eSEric Sandeen 61934392fbc4SJan Kara ext4_commit_super(sb); 6194c4be0c1dSTakashi Sato return 0; 6195ac27a0ecSDave Kleikamp } 6196ac27a0ecSDave Kleikamp 6197673c6100STheodore Ts'o /* 6198673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6199673c6100STheodore Ts'o */ 6200673c6100STheodore Ts'o struct ext4_mount_options { 6201673c6100STheodore Ts'o unsigned long s_mount_opt; 6202a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 620308cefc7aSEric W. Biederman kuid_t s_resuid; 620408cefc7aSEric W. Biederman kgid_t s_resgid; 6205673c6100STheodore Ts'o unsigned long s_commit_interval; 6206673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6207673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6208673c6100STheodore Ts'o int s_jquota_fmt; 6209a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6210673c6100STheodore Ts'o #endif 6211673c6100STheodore Ts'o }; 6212673c6100STheodore Ts'o 6213960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6214ac27a0ecSDave Kleikamp { 62157edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6216617ba13bSMingming Cao struct ext4_super_block *es; 6217617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6218960e0ab6SLukas Czerner unsigned long old_sb_flags; 6219617ba13bSMingming Cao struct ext4_mount_options old_opts; 62208a266467STheodore Ts'o ext4_group_t g; 6221c5e06d10SJohann Lombardi int err = 0; 6222ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 62233bbef91bSAustin Kim int enable_quota = 0; 622403dafb5fSChen Gang int i, j; 622533458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6226ac27a0ecSDave Kleikamp #endif 6227b237e304SHarshad Shirwadkar 62287edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 622921ac738eSChengguang Xu 6230ac27a0ecSDave Kleikamp /* Store the original options */ 6231ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6232ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6233a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6234ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6235ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6236ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 623730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 623830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6239ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6240ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6241a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 624203dafb5fSChen Gang if (sbi->s_qf_names[i]) { 624333458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 624433458eabSTheodore Ts'o 624533458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 624603dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 624703dafb5fSChen Gang for (j = 0; j < i; j++) 624803dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 624903dafb5fSChen Gang return -ENOMEM; 625003dafb5fSChen Gang } 625103dafb5fSChen Gang } else 625203dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6253ac27a0ecSDave Kleikamp #endif 6254b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 62557edfd85bSLukas Czerner ctx->journal_ioprio = 6256b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6257ac27a0ecSDave Kleikamp 62587edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6259ac27a0ecSDave Kleikamp 62606b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 62616b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 62626b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 62632d5b86e0SEric Sandeen "during remount not supported; ignoring"); 62642d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6265c6d3d56dSDarrick J. Wong } 6266c6d3d56dSDarrick J. Wong 62676ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 62686ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 62696ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62706ae6514bSPiotr Sarna "both data=journal and delalloc"); 62716ae6514bSPiotr Sarna err = -EINVAL; 62726ae6514bSPiotr Sarna goto restore_opts; 62736ae6514bSPiotr Sarna } 62746ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 62756ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62766ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 62776ae6514bSPiotr Sarna err = -EINVAL; 62786ae6514bSPiotr Sarna goto restore_opts; 62796ae6514bSPiotr Sarna } 6280ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6281ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6282ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6283ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6284ab04df78SJan Kara err = -EINVAL; 6285ab04df78SJan Kara goto restore_opts; 6286ab04df78SJan Kara } 6287923ae0ffSRoss Zwisler } 6288923ae0ffSRoss Zwisler 6289cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6290cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6291cdb7ee4cSTahsin Erdogan err = -EINVAL; 6292cdb7ee4cSTahsin Erdogan goto restore_opts; 6293cdb7ee4cSTahsin Erdogan } 6294cdb7ee4cSTahsin Erdogan 62959b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6296124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6297ac27a0ecSDave Kleikamp 62981751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 62991751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6300ac27a0ecSDave Kleikamp 6301ac27a0ecSDave Kleikamp es = sbi->s_es; 6302ac27a0ecSDave Kleikamp 6303b3881f74STheodore Ts'o if (sbi->s_journal) { 6304617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 63057edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6306b3881f74STheodore Ts'o } 6307ac27a0ecSDave Kleikamp 6308c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6309c92dc856SJan Kara flush_work(&sbi->s_error_work); 6310c92dc856SJan Kara 6311960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 63129b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6313ac27a0ecSDave Kleikamp err = -EROFS; 6314ac27a0ecSDave Kleikamp goto restore_opts; 6315ac27a0ecSDave Kleikamp } 6316ac27a0ecSDave Kleikamp 6317960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 631838c03b34STheodore Ts'o err = sync_filesystem(sb); 631938c03b34STheodore Ts'o if (err < 0) 632038c03b34STheodore Ts'o goto restore_opts; 63210f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 63220f0dd62fSChristoph Hellwig if (err < 0) 6323c79d967dSChristoph Hellwig goto restore_opts; 6324c79d967dSChristoph Hellwig 6325ac27a0ecSDave Kleikamp /* 6326ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6327ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6328ac27a0ecSDave Kleikamp */ 63291751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6330ac27a0ecSDave Kleikamp 6331ac27a0ecSDave Kleikamp /* 6332ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6333ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6334ac27a0ecSDave Kleikamp * mark the partition as valid again. 6335ac27a0ecSDave Kleikamp */ 6336617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6337617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6338ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6339ac27a0ecSDave Kleikamp 634011215630SJan Kara if (sbi->s_journal) { 634111215630SJan Kara /* 634211215630SJan Kara * We let remount-ro finish even if marking fs 634311215630SJan Kara * as clean failed... 634411215630SJan Kara */ 6345617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 634611215630SJan Kara } 6347ac27a0ecSDave Kleikamp } else { 6348a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6349e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 63502cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6351ac27a0ecSDave Kleikamp err = -EROFS; 6352ac27a0ecSDave Kleikamp goto restore_opts; 6353ac27a0ecSDave Kleikamp } 6354ead6596bSEric Sandeen /* 63558a266467STheodore Ts'o * Make sure the group descriptor checksums 63560b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 63578a266467STheodore Ts'o */ 63588a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 63598a266467STheodore Ts'o struct ext4_group_desc *gdp = 63608a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 63618a266467STheodore Ts'o 6362feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6363b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6364b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6365e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 63668a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 63676a797d27SDarrick J. Wong err = -EFSBADCRC; 63688a266467STheodore Ts'o goto restore_opts; 63698a266467STheodore Ts'o } 63708a266467STheodore Ts'o } 63718a266467STheodore Ts'o 63728a266467STheodore Ts'o /* 6373ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6374ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6375ead6596bSEric Sandeen * require a full umount/remount for now. 6376ead6596bSEric Sandeen */ 637702f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6378b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6379ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6380ead6596bSEric Sandeen "orphan inode list. Please " 6381b31e1552SEric Sandeen "umount/remount instead"); 6382ead6596bSEric Sandeen err = -EINVAL; 6383ead6596bSEric Sandeen goto restore_opts; 6384ead6596bSEric Sandeen } 6385ead6596bSEric Sandeen 6386ac27a0ecSDave Kleikamp /* 6387ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6388ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6389ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6390ac27a0ecSDave Kleikamp * the partition.) 6391ac27a0ecSDave Kleikamp */ 639211215630SJan Kara if (sbi->s_journal) { 639311215630SJan Kara err = ext4_clear_journal_err(sb, es); 639411215630SJan Kara if (err) 639511215630SJan Kara goto restore_opts; 639611215630SJan Kara } 6397ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6398c89128a0SJaegeuk Kim 6399c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6400c89128a0SJaegeuk Kim if (err) 6401c89128a0SJaegeuk Kim goto restore_opts; 6402c89128a0SJaegeuk Kim 64031751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6404e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6405c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6406c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6407c5e06d10SJohann Lombardi err = -EROFS; 6408c5e06d10SJohann Lombardi goto restore_opts; 6409c5e06d10SJohann Lombardi } 64103bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6411c79d967dSChristoph Hellwig enable_quota = 1; 64123bbef91bSAustin Kim #endif 6413ac27a0ecSDave Kleikamp } 6414ac27a0ecSDave Kleikamp } 6415bfff6873SLukas Czerner 6416bfff6873SLukas Czerner /* 6417bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6418bfff6873SLukas Czerner * current settings 6419bfff6873SLukas Czerner */ 6420bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6421bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6422bfff6873SLukas Czerner else { 6423bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6424bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6425bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6426bfff6873SLukas Czerner } 6427bfff6873SLukas Czerner 64280f5bde1dSJan Kara /* 64290f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 64300f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 64310f5bde1dSJan Kara * succeed. 64320f5bde1dSJan Kara */ 6433dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6434d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6435d176b1f6SJan Kara if (err) 6436d176b1f6SJan Kara goto restore_opts; 64370f5bde1dSJan Kara } 6438d176b1f6SJan Kara 6439c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 64404392fbc4SJan Kara err = ext4_commit_super(sb); 6441c89128a0SJaegeuk Kim if (err) 6442c89128a0SJaegeuk Kim goto restore_opts; 6443c89128a0SJaegeuk Kim } 64440390131bSFrank Mayhar 6445ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6446ac27a0ecSDave Kleikamp /* Release old quota file names */ 6447a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6448ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 64497c319d32SAditya Kali if (enable_quota) { 64507c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 64510f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6452e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 64537c319d32SAditya Kali err = ext4_enable_quotas(sb); 645407724f98STheodore Ts'o if (err) 64557c319d32SAditya Kali goto restore_opts; 64567c319d32SAditya Kali } 64577c319d32SAditya Kali } 64587c319d32SAditya Kali #endif 6459dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 64600f5bde1dSJan Kara ext4_release_system_zone(sb); 6461d4c402d9SCurt Wohlgemuth 646261bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 646361bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 646461bb4a1cSTheodore Ts'o 6465ac27a0ecSDave Kleikamp return 0; 64660b8e58a1SAndreas Dilger 6467ac27a0ecSDave Kleikamp restore_opts: 6468ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6469ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6470a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6471ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6472ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6473ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 647430773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 647530773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6476dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 64770f5bde1dSJan Kara ext4_release_system_zone(sb); 6478ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6479ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6480a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 648133458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 648233458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6483ac27a0ecSDave Kleikamp } 648433458eabSTheodore Ts'o synchronize_rcu(); 648533458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 648633458eabSTheodore Ts'o kfree(to_free[i]); 6487ac27a0ecSDave Kleikamp #endif 648861bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 648961bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6490ac27a0ecSDave Kleikamp return err; 6491ac27a0ecSDave Kleikamp } 6492ac27a0ecSDave Kleikamp 6493cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 64947edfd85bSLukas Czerner { 6495cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 64967edfd85bSLukas Czerner int ret; 64977edfd85bSLukas Czerner 6498cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 64997edfd85bSLukas Czerner 6500cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 65017edfd85bSLukas Czerner if (ret < 0) 65027edfd85bSLukas Czerner return ret; 6503cebe85d5SLukas Czerner 6504960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6505cebe85d5SLukas Czerner if (ret < 0) 6506cebe85d5SLukas Czerner return ret; 6507cebe85d5SLukas Czerner 6508cebe85d5SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.", 6509cebe85d5SLukas Czerner ext4_quota_mode(sb)); 6510cebe85d5SLukas Czerner 6511cebe85d5SLukas Czerner return 0; 65127edfd85bSLukas Czerner } 65137edfd85bSLukas Czerner 6514689c958cSLi Xi #ifdef CONFIG_QUOTA 6515689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6516689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6517689c958cSLi Xi { 6518689c958cSLi Xi struct kqid qid; 6519689c958cSLi Xi struct dquot *dquot; 6520689c958cSLi Xi u64 limit; 6521689c958cSLi Xi u64 curblock; 6522689c958cSLi Xi 6523689c958cSLi Xi qid = make_kqid_projid(projid); 6524689c958cSLi Xi dquot = dqget(sb, qid); 6525689c958cSLi Xi if (IS_ERR(dquot)) 6526689c958cSLi Xi return PTR_ERR(dquot); 65277b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6528689c958cSLi Xi 6529a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6530a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 653157c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 653257c32ea4SChengguang Xu 6533689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6534f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6535f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6536689c958cSLi Xi buf->f_blocks = limit; 6537689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6538689c958cSLi Xi (buf->f_blocks > curblock) ? 6539689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6540689c958cSLi Xi } 6541689c958cSLi Xi 6542a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6543a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6544689c958cSLi Xi if (limit && buf->f_files > limit) { 6545689c958cSLi Xi buf->f_files = limit; 6546689c958cSLi Xi buf->f_ffree = 6547689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6548689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6549689c958cSLi Xi } 6550689c958cSLi Xi 65517b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6552689c958cSLi Xi dqput(dquot); 6553689c958cSLi Xi return 0; 6554689c958cSLi Xi } 6555689c958cSLi Xi #endif 6556689c958cSLi Xi 6557617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6558ac27a0ecSDave Kleikamp { 6559ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6560617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6561617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 656227dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6563d02a9391SKazuya Mio s64 bfree; 656427dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6565ac27a0ecSDave Kleikamp 6566952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6567952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6568ac27a0ecSDave Kleikamp 6569617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6570ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6571b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 657257042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 657357042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6574d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 657557042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 657627dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 657727dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 657827dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6579ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6580ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 658152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6582617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 65839591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 65840b8e58a1SAndreas Dilger 6585689c958cSLi Xi #ifdef CONFIG_QUOTA 6586689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6587689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6588689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6589689c958cSLi Xi #endif 6590ac27a0ecSDave Kleikamp return 0; 6591ac27a0ecSDave Kleikamp } 6592ac27a0ecSDave Kleikamp 6593ac27a0ecSDave Kleikamp 6594ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6595ac27a0ecSDave Kleikamp 6596bc8230eeSJan Kara /* 6597bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6598bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6599bc8230eeSJan Kara */ 6600ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6601ac27a0ecSDave Kleikamp { 66024c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6603ac27a0ecSDave Kleikamp } 6604ac27a0ecSDave Kleikamp 6605617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6606ac27a0ecSDave Kleikamp { 6607ac27a0ecSDave Kleikamp int ret, err; 6608ac27a0ecSDave Kleikamp handle_t *handle; 6609ac27a0ecSDave Kleikamp struct inode *inode; 6610ac27a0ecSDave Kleikamp 6611ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 66129924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6613617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6614ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6615ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6616ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6617617ba13bSMingming Cao err = ext4_journal_stop(handle); 6618ac27a0ecSDave Kleikamp if (!ret) 6619ac27a0ecSDave Kleikamp ret = err; 6620ac27a0ecSDave Kleikamp return ret; 6621ac27a0ecSDave Kleikamp } 6622ac27a0ecSDave Kleikamp 6623617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6624ac27a0ecSDave Kleikamp { 6625ac27a0ecSDave Kleikamp int ret, err; 6626ac27a0ecSDave Kleikamp handle_t *handle; 6627ac27a0ecSDave Kleikamp 66289924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6629617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6630ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6631ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6632ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6633617ba13bSMingming Cao err = ext4_journal_stop(handle); 6634ac27a0ecSDave Kleikamp if (!ret) 6635ac27a0ecSDave Kleikamp ret = err; 6636ac27a0ecSDave Kleikamp return ret; 6637ac27a0ecSDave Kleikamp } 6638ac27a0ecSDave Kleikamp 6639617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6640ac27a0ecSDave Kleikamp { 6641ac27a0ecSDave Kleikamp int ret, err; 6642ac27a0ecSDave Kleikamp handle_t *handle; 6643ac27a0ecSDave Kleikamp 66449924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6645617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 66469c3013e9SJan Kara if (IS_ERR(handle)) { 66479c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 66489c3013e9SJan Kara dquot_release(dquot); 6649ac27a0ecSDave Kleikamp return PTR_ERR(handle); 66509c3013e9SJan Kara } 6651ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6652617ba13bSMingming Cao err = ext4_journal_stop(handle); 6653ac27a0ecSDave Kleikamp if (!ret) 6654ac27a0ecSDave Kleikamp ret = err; 6655ac27a0ecSDave Kleikamp return ret; 6656ac27a0ecSDave Kleikamp } 6657ac27a0ecSDave Kleikamp 6658617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6659ac27a0ecSDave Kleikamp { 6660262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6661262b4662SJan Kara 6662f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6663ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6664617ba13bSMingming Cao return ext4_write_dquot(dquot); 6665ac27a0ecSDave Kleikamp } else { 6666ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6667ac27a0ecSDave Kleikamp } 6668ac27a0ecSDave Kleikamp } 6669ac27a0ecSDave Kleikamp 6670617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6671ac27a0ecSDave Kleikamp { 6672ac27a0ecSDave Kleikamp int ret, err; 6673ac27a0ecSDave Kleikamp handle_t *handle; 6674ac27a0ecSDave Kleikamp 6675ac27a0ecSDave Kleikamp /* Data block + inode block */ 66762b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6677ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6678ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6679ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6680617ba13bSMingming Cao err = ext4_journal_stop(handle); 6681ac27a0ecSDave Kleikamp if (!ret) 6682ac27a0ecSDave Kleikamp ret = err; 6683ac27a0ecSDave Kleikamp return ret; 6684ac27a0ecSDave Kleikamp } 6685ac27a0ecSDave Kleikamp 6686daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6687daf647d2STheodore Ts'o { 6688daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6689daf647d2STheodore Ts'o 6690daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6691daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6692daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6693daf647d2STheodore Ts'o * because the name of the lock is set using the 6694daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6695daf647d2STheodore Ts'o */ 6696daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6697daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6698daf647d2STheodore Ts'o } 6699daf647d2STheodore Ts'o 6700ac27a0ecSDave Kleikamp /* 6701ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6702ac27a0ecSDave Kleikamp */ 6703617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 67048c54ca9cSAl Viro const struct path *path) 6705ac27a0ecSDave Kleikamp { 6706ac27a0ecSDave Kleikamp int err; 6707ac27a0ecSDave Kleikamp 6708ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6709ac27a0ecSDave Kleikamp return -EINVAL; 67100623543bSJan Kara 6711ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6712d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6713ac27a0ecSDave Kleikamp return -EXDEV; 6714e0770e91SJan Kara 6715e0770e91SJan Kara /* Quota already enabled for this file? */ 6716e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6717e0770e91SJan Kara return -EBUSY; 6718e0770e91SJan Kara 67190623543bSJan Kara /* Journaling quota? */ 67200623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 67212b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6722f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6723b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6724b31e1552SEric Sandeen "Quota file not on filesystem root. " 6725b31e1552SEric Sandeen "Journaled quota will not work"); 672691389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 672791389240SJan Kara } else { 672891389240SJan Kara /* 672991389240SJan Kara * Clear the flag just in case mount options changed since 673091389240SJan Kara * last time. 673191389240SJan Kara */ 673291389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 67330623543bSJan Kara } 67340623543bSJan Kara 67350623543bSJan Kara /* 67360623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 67370623543bSJan Kara * all updates to the file when we bypass pagecache... 67380623543bSJan Kara */ 67390390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 67402b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 67410623543bSJan Kara /* 67420623543bSJan Kara * We don't need to lock updates but journal_flush() could 67430623543bSJan Kara * otherwise be livelocked... 67440623543bSJan Kara */ 67450623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 674601d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 67470623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6748f00c9e44SJan Kara if (err) 67497ffe1ea8SHidehiro Kawai return err; 67507ffe1ea8SHidehiro Kawai } 6751957153fcSJan Kara 6752daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6753daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 675415fc69bbSJan Kara if (!err) { 6755957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6756957153fcSJan Kara handle_t *handle; 6757957153fcSJan Kara 675861a92987SJan Kara /* 675961a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 676061a92987SJan Kara * files. If this fails, we return success anyway since quotas 676161a92987SJan Kara * are already enabled and this is not a hard failure. 676261a92987SJan Kara */ 6763957153fcSJan Kara inode_lock(inode); 6764957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6765957153fcSJan Kara if (IS_ERR(handle)) 6766957153fcSJan Kara goto unlock_inode; 6767957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6768957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6769957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 67704209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6771957153fcSJan Kara ext4_journal_stop(handle); 6772957153fcSJan Kara unlock_inode: 6773957153fcSJan Kara inode_unlock(inode); 677415fc69bbSJan Kara if (err) 677515fc69bbSJan Kara dquot_quota_off(sb, type); 6776957153fcSJan Kara } 677715fc69bbSJan Kara if (err) 677815fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 677915fc69bbSJan Kara I_DATA_SEM_NORMAL); 6780daf647d2STheodore Ts'o return err; 6781ac27a0ecSDave Kleikamp } 6782ac27a0ecSDave Kleikamp 67837c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 67847c319d32SAditya Kali unsigned int flags) 67857c319d32SAditya Kali { 67867c319d32SAditya Kali int err; 67877c319d32SAditya Kali struct inode *qf_inode; 6788a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 67897c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6790689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6791689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 67927c319d32SAditya Kali }; 67937c319d32SAditya Kali 6794e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 67957c319d32SAditya Kali 67967c319d32SAditya Kali if (!qf_inums[type]) 67977c319d32SAditya Kali return -EPERM; 67987c319d32SAditya Kali 67998a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 68007c319d32SAditya Kali if (IS_ERR(qf_inode)) { 68017c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 68027c319d32SAditya Kali return PTR_ERR(qf_inode); 68037c319d32SAditya Kali } 68047c319d32SAditya Kali 6805bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6806bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6807daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 68087212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6809daf647d2STheodore Ts'o if (err) 6810daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 681161157b24SPan Bian iput(qf_inode); 68127c319d32SAditya Kali 68137c319d32SAditya Kali return err; 68147c319d32SAditya Kali } 68157c319d32SAditya Kali 68167c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 681725c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 68187c319d32SAditya Kali { 68197c319d32SAditya Kali int type, err = 0; 6820a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 68217c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6822689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6823689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 68247c319d32SAditya Kali }; 682549da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 682649da9392SJan Kara test_opt(sb, USRQUOTA), 682749da9392SJan Kara test_opt(sb, GRPQUOTA), 682849da9392SJan Kara test_opt(sb, PRJQUOTA), 682949da9392SJan Kara }; 68307c319d32SAditya Kali 683191389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6832a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 68337c319d32SAditya Kali if (qf_inums[type]) { 68347c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 683549da9392SJan Kara DQUOT_USAGE_ENABLED | 683649da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 68377c319d32SAditya Kali if (err) { 68387c319d32SAditya Kali ext4_warning(sb, 683972ba7450STheodore Ts'o "Failed to enable quota tracking " 684072ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 684172ba7450STheodore Ts'o "e2fsck to fix.", type, err); 68424013d47aSJan Kara for (type--; type >= 0; type--) { 68434013d47aSJan Kara struct inode *inode; 68444013d47aSJan Kara 68454013d47aSJan Kara inode = sb_dqopt(sb)->files[type]; 68464013d47aSJan Kara if (inode) 68474013d47aSJan Kara inode = igrab(inode); 68487f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 68494013d47aSJan Kara if (inode) { 68504013d47aSJan Kara lockdep_set_quota_inode(inode, 68514013d47aSJan Kara I_DATA_SEM_NORMAL); 68524013d47aSJan Kara iput(inode); 68534013d47aSJan Kara } 68544013d47aSJan Kara } 68557f144fd0SJunichi Uekawa 68567c319d32SAditya Kali return err; 68577c319d32SAditya Kali } 68587c319d32SAditya Kali } 68597c319d32SAditya Kali } 68607c319d32SAditya Kali return 0; 68617c319d32SAditya Kali } 68627c319d32SAditya Kali 6863ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6864ca0e05e4SDmitry Monakhov { 686521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 686621f97697SJan Kara handle_t *handle; 6867957153fcSJan Kara int err; 686821f97697SJan Kara 686987009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 687087009d86SDmitry Monakhov * Caller already holds s_umount sem */ 687187009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6872ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6873ca0e05e4SDmitry Monakhov 6874957153fcSJan Kara if (!inode || !igrab(inode)) 68750b268590SAmir Goldstein goto out; 68760b268590SAmir Goldstein 6877957153fcSJan Kara err = dquot_quota_off(sb, type); 6878964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6879957153fcSJan Kara goto out_put; 6880957153fcSJan Kara 6881957153fcSJan Kara inode_lock(inode); 688261a92987SJan Kara /* 688361a92987SJan Kara * Update modification times of quota files when userspace can 688461a92987SJan Kara * start looking at them. If we fail, we return success anyway since 688561a92987SJan Kara * this is not a hard failure and quotas are already disabled. 688661a92987SJan Kara */ 68879924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 68884209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 68894209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6890957153fcSJan Kara goto out_unlock; 68914209ae12SHarshad Shirwadkar } 6892957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6893957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6894eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 68954209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 689621f97697SJan Kara ext4_journal_stop(handle); 6897957153fcSJan Kara out_unlock: 6898957153fcSJan Kara inode_unlock(inode); 6899957153fcSJan Kara out_put: 6900964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6901957153fcSJan Kara iput(inode); 6902957153fcSJan Kara return err; 690321f97697SJan Kara out: 6904ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6905ca0e05e4SDmitry Monakhov } 6906ca0e05e4SDmitry Monakhov 6907ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6908ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6909ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6910ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6911617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6912ac27a0ecSDave Kleikamp size_t len, loff_t off) 6913ac27a0ecSDave Kleikamp { 6914ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6915725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6916ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6917ac27a0ecSDave Kleikamp int tocopy; 6918ac27a0ecSDave Kleikamp size_t toread; 6919ac27a0ecSDave Kleikamp struct buffer_head *bh; 6920ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6921ac27a0ecSDave Kleikamp 6922ac27a0ecSDave Kleikamp if (off > i_size) 6923ac27a0ecSDave Kleikamp return 0; 6924ac27a0ecSDave Kleikamp if (off+len > i_size) 6925ac27a0ecSDave Kleikamp len = i_size-off; 6926ac27a0ecSDave Kleikamp toread = len; 6927ac27a0ecSDave Kleikamp while (toread > 0) { 6928ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6929ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 69301c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 69311c215028STheodore Ts'o if (IS_ERR(bh)) 69321c215028STheodore Ts'o return PTR_ERR(bh); 6933ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6934ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6935ac27a0ecSDave Kleikamp else 6936ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6937ac27a0ecSDave Kleikamp brelse(bh); 6938ac27a0ecSDave Kleikamp offset = 0; 6939ac27a0ecSDave Kleikamp toread -= tocopy; 6940ac27a0ecSDave Kleikamp data += tocopy; 6941ac27a0ecSDave Kleikamp blk++; 6942ac27a0ecSDave Kleikamp } 6943ac27a0ecSDave Kleikamp return len; 6944ac27a0ecSDave Kleikamp } 6945ac27a0ecSDave Kleikamp 6946ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6947ac27a0ecSDave Kleikamp * enough credits) */ 6948617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6949ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6950ac27a0ecSDave Kleikamp { 6951ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6952725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 69534209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6954c5e298aeSTheodore Ts'o int retries = 0; 6955ac27a0ecSDave Kleikamp struct buffer_head *bh; 6956ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6957ac27a0ecSDave Kleikamp 6958380a0091SYe Bin if (!handle) { 6959b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6960b31e1552SEric Sandeen " cancelled because transaction is not started", 69619c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 69629c3013e9SJan Kara return -EIO; 69639c3013e9SJan Kara } 696467eeb568SDmitry Monakhov /* 696567eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 696667eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 696767eeb568SDmitry Monakhov */ 696867eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 696967eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 697067eeb568SDmitry Monakhov " cancelled because not block aligned", 697167eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 697267eeb568SDmitry Monakhov return -EIO; 697367eeb568SDmitry Monakhov } 697467eeb568SDmitry Monakhov 6975c5e298aeSTheodore Ts'o do { 6976c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6977c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6978c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 697945586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6980c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 69811c215028STheodore Ts'o if (IS_ERR(bh)) 69821c215028STheodore Ts'o return PTR_ERR(bh); 6983ac27a0ecSDave Kleikamp if (!bh) 6984ac27a0ecSDave Kleikamp goto out; 69855d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6986188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 6987ac27a0ecSDave Kleikamp if (err) { 6988ac27a0ecSDave Kleikamp brelse(bh); 69891c215028STheodore Ts'o return err; 6990ac27a0ecSDave Kleikamp } 6991ac27a0ecSDave Kleikamp lock_buffer(bh); 699267eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6993ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6994ac27a0ecSDave Kleikamp unlock_buffer(bh); 69950390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6996ac27a0ecSDave Kleikamp brelse(bh); 6997ac27a0ecSDave Kleikamp out: 699867eeb568SDmitry Monakhov if (inode->i_size < off + len) { 699967eeb568SDmitry Monakhov i_size_write(inode, off + len); 7000617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 70014209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 70024209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 70034209ae12SHarshad Shirwadkar err = err2; 700421f97697SJan Kara } 70054209ae12SHarshad Shirwadkar return err ? err : len; 7006ac27a0ecSDave Kleikamp } 7007ac27a0ecSDave Kleikamp #endif 7008ac27a0ecSDave Kleikamp 7009c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 701024b58424STheodore Ts'o static inline void register_as_ext2(void) 701124b58424STheodore Ts'o { 701224b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 701324b58424STheodore Ts'o if (err) 701424b58424STheodore Ts'o printk(KERN_WARNING 701524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 701624b58424STheodore Ts'o } 701724b58424STheodore Ts'o 701824b58424STheodore Ts'o static inline void unregister_as_ext2(void) 701924b58424STheodore Ts'o { 702024b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 702124b58424STheodore Ts'o } 70222035e776STheodore Ts'o 70232035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 70242035e776STheodore Ts'o { 7025e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 70262035e776STheodore Ts'o return 0; 7027bc98a42cSDavid Howells if (sb_rdonly(sb)) 70282035e776STheodore Ts'o return 1; 7029e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 70302035e776STheodore Ts'o return 0; 70312035e776STheodore Ts'o return 1; 70322035e776STheodore Ts'o } 703324b58424STheodore Ts'o #else 703424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 703524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 70362035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 703724b58424STheodore Ts'o #endif 703824b58424STheodore Ts'o 703924b58424STheodore Ts'o static inline void register_as_ext3(void) 704024b58424STheodore Ts'o { 704124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 704224b58424STheodore Ts'o if (err) 704324b58424STheodore Ts'o printk(KERN_WARNING 704424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 704524b58424STheodore Ts'o } 704624b58424STheodore Ts'o 704724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 704824b58424STheodore Ts'o { 704924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 705024b58424STheodore Ts'o } 70512035e776STheodore Ts'o 70522035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 70532035e776STheodore Ts'o { 7054e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 70552035e776STheodore Ts'o return 0; 7056e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 70572035e776STheodore Ts'o return 0; 7058bc98a42cSDavid Howells if (sb_rdonly(sb)) 70592035e776STheodore Ts'o return 1; 7060e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 70612035e776STheodore Ts'o return 0; 70622035e776STheodore Ts'o return 1; 70632035e776STheodore Ts'o } 706424b58424STheodore Ts'o 706503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7066ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 706703010a33STheodore Ts'o .name = "ext4", 7068cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7069cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7070ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 707114f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7072ac27a0ecSDave Kleikamp }; 70737f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7074ac27a0ecSDave Kleikamp 7075e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7076e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7077e9e3bcecSEric Sandeen 70785dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7079ac27a0ecSDave Kleikamp { 7080e9e3bcecSEric Sandeen int i, err; 7081c9de560dSAlex Tomas 7082e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 708307c0c5d8SAl Viro ext4_li_info = NULL; 708407c0c5d8SAl Viro 70859a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 708612e9b892SDmitry Monakhov ext4_check_flag_values(); 7087e9e3bcecSEric Sandeen 7088e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7089e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7090e9e3bcecSEric Sandeen 709151865fdaSZheng Liu err = ext4_init_es(); 70926fd058f7STheodore Ts'o if (err) 70936fd058f7STheodore Ts'o return err; 709451865fdaSZheng Liu 70951dc0aa46SEric Whitney err = ext4_init_pending(); 70961dc0aa46SEric Whitney if (err) 709722cfe4b4SEric Biggers goto out7; 709822cfe4b4SEric Biggers 709922cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 710022cfe4b4SEric Biggers if (err) 71011dc0aa46SEric Whitney goto out6; 71021dc0aa46SEric Whitney 710351865fdaSZheng Liu err = ext4_init_pageio(); 710451865fdaSZheng Liu if (err) 7105b5799018STheodore Ts'o goto out5; 710651865fdaSZheng Liu 71075dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7108bd2d0210STheodore Ts'o if (err) 7109b5799018STheodore Ts'o goto out4; 7110857ac889SLukas Czerner 7111b5799018STheodore Ts'o err = ext4_init_sysfs(); 7112dd68314cSTheodore Ts'o if (err) 7113b5799018STheodore Ts'o goto out3; 7114857ac889SLukas Czerner 71155dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7116ac27a0ecSDave Kleikamp if (err) 7117c9de560dSAlex Tomas goto out2; 7118ac27a0ecSDave Kleikamp err = init_inodecache(); 7119ac27a0ecSDave Kleikamp if (err) 7120ac27a0ecSDave Kleikamp goto out1; 7121aa75f4d3SHarshad Shirwadkar 7122aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7123aa75f4d3SHarshad Shirwadkar if (err) 7124aa75f4d3SHarshad Shirwadkar goto out05; 7125aa75f4d3SHarshad Shirwadkar 712624b58424STheodore Ts'o register_as_ext3(); 71272035e776STheodore Ts'o register_as_ext2(); 712803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7129ac27a0ecSDave Kleikamp if (err) 7130ac27a0ecSDave Kleikamp goto out; 7131bfff6873SLukas Czerner 7132ac27a0ecSDave Kleikamp return 0; 7133ac27a0ecSDave Kleikamp out: 713424b58424STheodore Ts'o unregister_as_ext2(); 713524b58424STheodore Ts'o unregister_as_ext3(); 7136ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7137aa75f4d3SHarshad Shirwadkar out05: 7138ac27a0ecSDave Kleikamp destroy_inodecache(); 7139ac27a0ecSDave Kleikamp out1: 71405dabfc78STheodore Ts'o ext4_exit_mballoc(); 71419c191f70ST Makphaibulchoke out2: 7142b5799018STheodore Ts'o ext4_exit_sysfs(); 7143b5799018STheodore Ts'o out3: 7144dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7145b5799018STheodore Ts'o out4: 71465dabfc78STheodore Ts'o ext4_exit_pageio(); 7147b5799018STheodore Ts'o out5: 714822cfe4b4SEric Biggers ext4_exit_post_read_processing(); 71491dc0aa46SEric Whitney out6: 715022cfe4b4SEric Biggers ext4_exit_pending(); 715122cfe4b4SEric Biggers out7: 715251865fdaSZheng Liu ext4_exit_es(); 715351865fdaSZheng Liu 7154ac27a0ecSDave Kleikamp return err; 7155ac27a0ecSDave Kleikamp } 7156ac27a0ecSDave Kleikamp 71575dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7158ac27a0ecSDave Kleikamp { 7159bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 716024b58424STheodore Ts'o unregister_as_ext2(); 716124b58424STheodore Ts'o unregister_as_ext3(); 716203010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7163ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7164ac27a0ecSDave Kleikamp destroy_inodecache(); 71655dabfc78STheodore Ts'o ext4_exit_mballoc(); 7166b5799018STheodore Ts'o ext4_exit_sysfs(); 71675dabfc78STheodore Ts'o ext4_exit_system_zone(); 71685dabfc78STheodore Ts'o ext4_exit_pageio(); 716922cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7170dd12ed14SEric Sandeen ext4_exit_es(); 71711dc0aa46SEric Whitney ext4_exit_pending(); 7172ac27a0ecSDave Kleikamp } 7173ac27a0ecSDave Kleikamp 7174ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 717583982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7176ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 71777ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 71785dabfc78STheodore Ts'o module_init(ext4_init_fs) 71795dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7180