1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427abc52c2SDan Magenheimer #include <linux/cleancache.h> 437c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 44ee73f9a5SJeff Layton #include <linux/iversion.h> 45c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 46c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 47bfff6873SLukas Czerner #include <linux/kthread.h> 48bfff6873SLukas Czerner #include <linux/freezer.h> 499a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 50e5a185c2SLukas Czerner #include <linux/fs_context.h> 51e5a185c2SLukas Czerner #include <linux/fs_parser.h> 52bfff6873SLukas Czerner 533dcf5451SChristoph Hellwig #include "ext4.h" 544a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 553dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 56ac27a0ecSDave Kleikamp #include "xattr.h" 57ac27a0ecSDave Kleikamp #include "acl.h" 583661d286STheodore Ts'o #include "mballoc.h" 590c9ec4beSDarrick J. Wong #include "fsmap.h" 60ac27a0ecSDave Kleikamp 619bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 629bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 639bffad1eSTheodore Ts'o 640b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6559ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 66e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 679f6200bbSTheodore Ts'o 68617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 69ac27a0ecSDave Kleikamp unsigned long journal_devnum); 702adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 712d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 724392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7311215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 74617ba13bSMingming Cao struct ext4_super_block *es); 7511215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 76617ba13bSMingming Cao struct ext4_super_block *es); 77617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 78617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 79617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 80c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 81c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 82152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 83152a0836SAl Viro const char *dev_name, void *data); 842035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 852035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 86bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 87bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 888f1f7453SEric Sandeen static void ext4_clear_request_list(void); 89c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 90c6cb7e77SEric Whitney unsigned int journal_inum); 914c94bff9SLukas Czerner static int ext4_validate_options(struct super_block *sb); 92ac27a0ecSDave Kleikamp 93e74031fdSJan Kara /* 94e74031fdSJan Kara * Lock ordering 95e74031fdSJan Kara * 96e74031fdSJan Kara * page fault path: 97d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 98d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 99e74031fdSJan Kara * 100e74031fdSJan Kara * buffered write path: 101c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 102e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 103e74031fdSJan Kara * i_data_sem (rw) 104e74031fdSJan Kara * 105e74031fdSJan Kara * truncate: 106d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 107d4f5258eSJan Kara * page lock 108d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1091d39834fSNikolay Borisov * i_data_sem (rw) 110e74031fdSJan Kara * 111e74031fdSJan Kara * direct IO: 112c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1131d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 114e74031fdSJan Kara * 115e74031fdSJan Kara * writepages: 116e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 117e74031fdSJan Kara */ 118e74031fdSJan Kara 119c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1202035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1212035e776STheodore Ts'o .owner = THIS_MODULE, 1222035e776STheodore Ts'o .name = "ext2", 1232035e776STheodore Ts'o .mount = ext4_mount, 1242035e776STheodore Ts'o .kill_sb = kill_block_super, 1252035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1262035e776STheodore Ts'o }; 1277f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 128fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1292035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1302035e776STheodore Ts'o #else 1312035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1322035e776STheodore Ts'o #endif 1332035e776STheodore Ts'o 1342035e776STheodore Ts'o 135ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 136ba69f9abSJan Kara .owner = THIS_MODULE, 137ba69f9abSJan Kara .name = "ext3", 138152a0836SAl Viro .mount = ext4_mount, 139ba69f9abSJan Kara .kill_sb = kill_block_super, 140ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 141ba69f9abSJan Kara }; 1427f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 143fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 144ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 145bd81d8eeSLaurent Vivier 146fa491b14Szhangyi (F) 147fa491b14Szhangyi (F) static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags, 148fa491b14Szhangyi (F) bh_end_io_t *end_io) 149fa491b14Szhangyi (F) { 150fb265c9cSTheodore Ts'o /* 151fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 152fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 153fa491b14Szhangyi (F) * recheck the buffer contents. 154fa491b14Szhangyi (F) */ 155fa491b14Szhangyi (F) clear_buffer_verified(bh); 156fa491b14Szhangyi (F) 157fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 158fa491b14Szhangyi (F) get_bh(bh); 159fa491b14Szhangyi (F) submit_bh(REQ_OP_READ, op_flags, bh); 160fa491b14Szhangyi (F) } 161fa491b14Szhangyi (F) 162fa491b14Szhangyi (F) void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 163fa491b14Szhangyi (F) bh_end_io_t *end_io) 164fa491b14Szhangyi (F) { 165fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 166fa491b14Szhangyi (F) 167fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 168fa491b14Szhangyi (F) unlock_buffer(bh); 169fa491b14Szhangyi (F) return; 170fa491b14Szhangyi (F) } 171fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 172fa491b14Szhangyi (F) } 173fa491b14Szhangyi (F) 174fa491b14Szhangyi (F) int ext4_read_bh(struct buffer_head *bh, int op_flags, bh_end_io_t *end_io) 175fa491b14Szhangyi (F) { 176fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 177fa491b14Szhangyi (F) 178fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 179fa491b14Szhangyi (F) unlock_buffer(bh); 180fa491b14Szhangyi (F) return 0; 181fa491b14Szhangyi (F) } 182fa491b14Szhangyi (F) 183fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 184fa491b14Szhangyi (F) 185fa491b14Szhangyi (F) wait_on_buffer(bh); 186fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 187fa491b14Szhangyi (F) return 0; 188fa491b14Szhangyi (F) return -EIO; 189fa491b14Szhangyi (F) } 190fa491b14Szhangyi (F) 191fa491b14Szhangyi (F) int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait) 192fa491b14Szhangyi (F) { 193fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 194fa491b14Szhangyi (F) if (wait) 195fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 196fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 197fa491b14Szhangyi (F) return 0; 198fa491b14Szhangyi (F) } 199fa491b14Szhangyi (F) if (wait) { 200fa491b14Szhangyi (F) wait_on_buffer(bh); 201fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 202fa491b14Szhangyi (F) return 0; 203fa491b14Szhangyi (F) return -EIO; 204fa491b14Szhangyi (F) } 205fa491b14Szhangyi (F) return 0; 206fa491b14Szhangyi (F) } 207fa491b14Szhangyi (F) 208fb265c9cSTheodore Ts'o /* 2098394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 210fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 211fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 212fb265c9cSTheodore Ts'o * return. 213fb265c9cSTheodore Ts'o */ 2148394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 2158394a6abSzhangyi (F) sector_t block, int op_flags, 2168394a6abSzhangyi (F) gfp_t gfp) 217fb265c9cSTheodore Ts'o { 2182d069c08Szhangyi (F) struct buffer_head *bh; 2192d069c08Szhangyi (F) int ret; 220fb265c9cSTheodore Ts'o 2218394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 222fb265c9cSTheodore Ts'o if (bh == NULL) 223fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 224cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 225fb265c9cSTheodore Ts'o return bh; 2262d069c08Szhangyi (F) 2272d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2282d069c08Szhangyi (F) if (ret) { 229fb265c9cSTheodore Ts'o put_bh(bh); 2302d069c08Szhangyi (F) return ERR_PTR(ret); 2312d069c08Szhangyi (F) } 2322d069c08Szhangyi (F) return bh; 233fb265c9cSTheodore Ts'o } 234fb265c9cSTheodore Ts'o 2358394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 2368394a6abSzhangyi (F) int op_flags) 2378394a6abSzhangyi (F) { 2388394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2398394a6abSzhangyi (F) } 2408394a6abSzhangyi (F) 2418394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2428394a6abSzhangyi (F) sector_t block) 2438394a6abSzhangyi (F) { 2448394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2458394a6abSzhangyi (F) } 2468394a6abSzhangyi (F) 2475df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2485df1d412Szhangyi (F) { 2495df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2505df1d412Szhangyi (F) 2515df1d412Szhangyi (F) if (likely(bh)) { 2525df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2535df1d412Szhangyi (F) brelse(bh); 2545df1d412Szhangyi (F) } 255c197855eSStephen Hemminger } 256a9c47317SDarrick J. Wong 257a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2589aa5d32bSDmitry Monakhov struct ext4_super_block *es) 259a9c47317SDarrick J. Wong { 260a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 261a9c47317SDarrick J. Wong return 1; 262a9c47317SDarrick J. Wong 263a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 26406db49e6STheodore Ts'o } 265a9c47317SDarrick J. Wong 26606db49e6STheodore Ts'o static __le32 ext4_superblock_csum(struct super_block *sb, 26706db49e6STheodore Ts'o struct ext4_super_block *es) 2689aa5d32bSDmitry Monakhov { 269a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 270a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 271a9c47317SDarrick J. Wong __u32 csum; 272a9c47317SDarrick J. Wong 273a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 2749933fc0aSTheodore Ts'o 2759933fc0aSTheodore Ts'o return cpu_to_le32(csum); 2769933fc0aSTheodore Ts'o } 2779933fc0aSTheodore Ts'o 2788be04b93SJoe Perches static int ext4_superblock_csum_verify(struct super_block *sb, 2799933fc0aSTheodore Ts'o struct ext4_super_block *es) 2809933fc0aSTheodore Ts'o { 2819933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2829933fc0aSTheodore Ts'o return 1; 2839933fc0aSTheodore Ts'o 2849933fc0aSTheodore Ts'o return es->s_checksum == ext4_superblock_csum(sb, es); 2859933fc0aSTheodore Ts'o } 2869933fc0aSTheodore Ts'o 2879933fc0aSTheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 2888be04b93SJoe Perches { 2899933fc0aSTheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2909933fc0aSTheodore Ts'o 2919933fc0aSTheodore Ts'o if (!ext4_has_metadata_csum(sb)) 2929933fc0aSTheodore Ts'o return; 2939933fc0aSTheodore Ts'o 2948fadc143SAlexandre Ratchov es->s_checksum = ext4_superblock_csum(sb, es); 2958fadc143SAlexandre Ratchov } 296bd81d8eeSLaurent Vivier 297bd81d8eeSLaurent Vivier ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 298bd81d8eeSLaurent Vivier struct ext4_group_desc *bg) 299bd81d8eeSLaurent Vivier { 3003a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3018fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3028fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 303bd81d8eeSLaurent Vivier } 304bd81d8eeSLaurent Vivier 3058fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3068fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 307bd81d8eeSLaurent Vivier { 3085272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3098fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3108fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 311bd81d8eeSLaurent Vivier } 312bd81d8eeSLaurent Vivier 3138fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3148fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 315bd81d8eeSLaurent Vivier { 3165272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3178fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3188fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 319bd81d8eeSLaurent Vivier } 320bd81d8eeSLaurent Vivier 321021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 322560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 323560671a0SAneesh Kumar K.V { 324560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 325560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 326560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 327560671a0SAneesh Kumar K.V } 328560671a0SAneesh Kumar K.V 329560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 330560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 331560671a0SAneesh Kumar K.V { 332560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 333560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 334560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 335560671a0SAneesh Kumar K.V } 336560671a0SAneesh Kumar K.V 337560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(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_used_dirs_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_used_dirs_count_hi) << 16 : 0); 343560671a0SAneesh Kumar K.V } 344560671a0SAneesh Kumar K.V 345560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_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_itable_unused_lo) | 349560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 350560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 351560671a0SAneesh Kumar K.V } 352560671a0SAneesh Kumar K.V 3538fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3548fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 355bd81d8eeSLaurent Vivier { 3563a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3578fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3588fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 359bd81d8eeSLaurent Vivier } 360bd81d8eeSLaurent Vivier 3618fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3628fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 363bd81d8eeSLaurent Vivier { 3645272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3658fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3668fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 367bd81d8eeSLaurent Vivier } 368bd81d8eeSLaurent Vivier 3698fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3708fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 371bd81d8eeSLaurent Vivier { 3725272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3738fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3748fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 375bd81d8eeSLaurent Vivier } 376bd81d8eeSLaurent Vivier 377021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 378560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 379560671a0SAneesh Kumar K.V { 380560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 381560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 382560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 383560671a0SAneesh Kumar K.V } 384560671a0SAneesh Kumar K.V 385560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 386560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 387560671a0SAneesh Kumar K.V { 388560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 389560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 390560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 391560671a0SAneesh Kumar K.V } 392560671a0SAneesh Kumar K.V 393560671a0SAneesh Kumar K.V void ext4_used_dirs_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_used_dirs_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_used_dirs_count_hi = cpu_to_le16(count >> 16); 399560671a0SAneesh Kumar K.V } 400560671a0SAneesh Kumar K.V 401560671a0SAneesh Kumar K.V void ext4_itable_unused_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_itable_unused_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_itable_unused_hi = cpu_to_le16(count >> 16); 407560671a0SAneesh Kumar K.V } 408560671a0SAneesh Kumar K.V 409c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4106a0678a7SArnd Bergmann { 4116a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4126a0678a7SArnd Bergmann 4136a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4146a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4156a0678a7SArnd Bergmann } 4166a0678a7SArnd Bergmann 4176a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4186a0678a7SArnd Bergmann { 4196a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4206a0678a7SArnd Bergmann } 4216a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 422c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 423c92dc856SJan Kara ktime_get_real_seconds()) 4246a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4256a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 426d3d1faf6SCurt Wohlgemuth 427bdfe0cbdSTheodore Ts'o /* 428bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 429bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 430bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 431bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 432bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 433bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 434bdfe0cbdSTheodore Ts'o */ 435bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 436bdfe0cbdSTheodore Ts'o { 437bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 438bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 439bdfe0cbdSTheodore Ts'o 440bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 441bdfe0cbdSTheodore Ts'o } 442bdfe0cbdSTheodore Ts'o 44318aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 44418aadd47SBobi Jam { 44518aadd47SBobi Jam struct super_block *sb = journal->j_private; 44618aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 44718aadd47SBobi Jam int error = is_journal_aborted(journal); 4485d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 44918aadd47SBobi Jam 4505d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 451a0154344SDaeho Jeong 452a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 453a0154344SDaeho Jeong 45418aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4555d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4565d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4575d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 45818aadd47SBobi Jam list_del_init(&jce->jce_list); 45918aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46018aadd47SBobi Jam jce->jce_func(sb, jce, error); 46118aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 46218aadd47SBobi Jam } 46318aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46418aadd47SBobi Jam } 4651c13d5c0STheodore Ts'o 466afb585a9SMauricio Faria de Oliveira /* 467afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 468afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 469afb585a9SMauricio Faria de Oliveira * 470afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 471afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 472afb585a9SMauricio Faria de Oliveira * to write protect the pages. 473afb585a9SMauricio Faria de Oliveira * 474afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 475afb585a9SMauricio Faria de Oliveira */ 476afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 477afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 478afb585a9SMauricio Faria de Oliveira void *data) 479afb585a9SMauricio Faria de Oliveira { 480afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 481afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 482afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 483afb585a9SMauricio Faria de Oliveira 484afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 485afb585a9SMauricio Faria de Oliveira do { 486afb585a9SMauricio Faria de Oliveira /* 487afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 488afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 489afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 490afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 491afb585a9SMauricio Faria de Oliveira * properly. 492afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 493afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 494afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 495afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 496afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 497afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 498afb585a9SMauricio Faria de Oliveira */ 499afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 500afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 501afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 502afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 503afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 504afb585a9SMauricio Faria de Oliveira goto out; 505afb585a9SMauricio Faria de Oliveira } 506afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 507afb585a9SMauricio Faria de Oliveira 508afb585a9SMauricio Faria de Oliveira out: 509afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 510afb585a9SMauricio Faria de Oliveira } 511afb585a9SMauricio Faria de Oliveira 512afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 513afb585a9SMauricio Faria de Oliveira { 514afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 515afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 516afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 517afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 518afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 519afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 520afb585a9SMauricio Faria de Oliveira }; 521afb585a9SMauricio Faria de Oliveira 522afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 523afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 524afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 525afb585a9SMauricio Faria de Oliveira } 526afb585a9SMauricio Faria de Oliveira 527afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 528afb585a9SMauricio Faria de Oliveira { 529afb585a9SMauricio Faria de Oliveira int ret; 530afb585a9SMauricio Faria de Oliveira 531afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 532afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 533afb585a9SMauricio Faria de Oliveira else 534afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 535afb585a9SMauricio Faria de Oliveira 536afb585a9SMauricio Faria de Oliveira return ret; 537afb585a9SMauricio Faria de Oliveira } 538afb585a9SMauricio Faria de Oliveira 539afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 540afb585a9SMauricio Faria de Oliveira { 541afb585a9SMauricio Faria de Oliveira int ret = 0; 542afb585a9SMauricio Faria de Oliveira 543afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 544afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 545afb585a9SMauricio Faria de Oliveira 546afb585a9SMauricio Faria de Oliveira return ret; 547afb585a9SMauricio Faria de Oliveira } 548afb585a9SMauricio Faria de Oliveira 5491dc1097fSJan Kara static bool system_going_down(void) 5501dc1097fSJan Kara { 5511dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5521dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5531dc1097fSJan Kara } 5541dc1097fSJan Kara 55502a7780eSJan Kara struct ext4_err_translation { 55602a7780eSJan Kara int code; 55702a7780eSJan Kara int errno; 55802a7780eSJan Kara }; 55902a7780eSJan Kara 56002a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 56102a7780eSJan Kara 56202a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 56302a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 56402a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 56502a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 56602a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 56702a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 56802a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 56902a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 57002a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 57102a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 57202a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 57302a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 57402a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 57502a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 57602a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 57702a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 57902a7780eSJan Kara }; 58002a7780eSJan Kara 58102a7780eSJan Kara static int ext4_errno_to_code(int errno) 58202a7780eSJan Kara { 58302a7780eSJan Kara int i; 58402a7780eSJan Kara 58502a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 58602a7780eSJan Kara if (err_translation[i].errno == errno) 58702a7780eSJan Kara return err_translation[i].code; 58802a7780eSJan Kara return EXT4_ERR_UNKNOWN; 58902a7780eSJan Kara } 59002a7780eSJan Kara 5912d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 59240676623SJan Kara __u32 ino, __u64 block, 59340676623SJan Kara const char *func, unsigned int line) 59440676623SJan Kara { 595c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 59640676623SJan Kara 59702a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 59802a7780eSJan Kara if (error == 0) 59902a7780eSJan Kara error = EFSCORRUPTED; 600c92dc856SJan Kara 601c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 602c92dc856SJan Kara sbi->s_add_error_count++; 603c92dc856SJan Kara sbi->s_last_error_code = error; 604c92dc856SJan Kara sbi->s_last_error_line = line; 605c92dc856SJan Kara sbi->s_last_error_ino = ino; 606c92dc856SJan Kara sbi->s_last_error_block = block; 607c92dc856SJan Kara sbi->s_last_error_func = func; 608c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 609c92dc856SJan Kara if (!sbi->s_first_error_time) { 610c92dc856SJan Kara sbi->s_first_error_code = error; 611c92dc856SJan Kara sbi->s_first_error_line = line; 612c92dc856SJan Kara sbi->s_first_error_ino = ino; 613c92dc856SJan Kara sbi->s_first_error_block = block; 614c92dc856SJan Kara sbi->s_first_error_func = func; 615c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 61640676623SJan Kara } 617c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 61840676623SJan Kara } 61940676623SJan Kara 620ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 621ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 622ac27a0ecSDave Kleikamp * 623ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 624617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 625ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 626ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 627ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 628ac27a0ecSDave Kleikamp * write out the superblock safely. 629ac27a0ecSDave Kleikamp * 630dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 631d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 632ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 633014c9caaSJan Kara * 634014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 635014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 636014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 637014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 638014c9caaSJan Kara * at a critical moment in log management. 639ac27a0ecSDave Kleikamp */ 640e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 641e789ca0cSJan Kara __u32 ino, __u64 block, 642e789ca0cSJan Kara const char *func, unsigned int line) 643ac27a0ecSDave Kleikamp { 644b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6452d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 646b08070ecSJan Kara 647e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 648327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 649327eaf73STheodore Ts'o WARN_ON_ONCE(1); 650327eaf73STheodore Ts'o 6512d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6529b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 653ac27a0ecSDave Kleikamp if (journal) 654dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6552d01ddc8SJan Kara } 6562d01ddc8SJan Kara 6572d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6582d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6592d01ddc8SJan Kara /* 6602d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6612d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6622d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6632d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6642d01ddc8SJan Kara */ 665bb9464e0Syangerkun if (continue_fs && journal) 6662d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6672d01ddc8SJan Kara else 6682d01ddc8SJan Kara ext4_commit_super(sb); 6692d01ddc8SJan Kara } 6702d01ddc8SJan Kara 6711dc1097fSJan Kara /* 6721dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6731dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6741dc1097fSJan Kara * disabled. 6751dc1097fSJan Kara */ 676014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 677617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 678ac27a0ecSDave Kleikamp sb->s_id); 679ac27a0ecSDave Kleikamp } 680ac2f7ca5SYe Bin 681ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 682ac2f7ca5SYe Bin return; 683ac2f7ca5SYe Bin 684014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 685014c9caaSJan Kara /* 686014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 687014c9caaSJan Kara * ->s_flags update 688014c9caaSJan Kara */ 689014c9caaSJan Kara smp_wmb(); 690014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 6914327ba52SDaeho Jeong } 692ac27a0ecSDave Kleikamp 693c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 694c92dc856SJan Kara { 695c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 696c92dc856SJan Kara s_error_work); 6972d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 6982d01ddc8SJan Kara handle_t *handle; 699c92dc856SJan Kara 7002d01ddc8SJan Kara /* 7012d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7022d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7032d01ddc8SJan Kara * updates. 7042d01ddc8SJan Kara * 7052d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7062d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7072d01ddc8SJan Kara */ 7082d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 709558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7102d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7112d01ddc8SJan Kara if (IS_ERR(handle)) 7122d01ddc8SJan Kara goto write_directly; 713558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7142d01ddc8SJan Kara jbd2_journal_stop(handle); 7152d01ddc8SJan Kara goto write_directly; 7162d01ddc8SJan Kara } 7172d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 718558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 719558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 720558d6450SYe Bin "superblock detected"); 721558d6450SYe Bin clear_buffer_write_io_error(sbh); 722558d6450SYe Bin set_buffer_uptodate(sbh); 723558d6450SYe Bin } 724558d6450SYe Bin 725558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7262d01ddc8SJan Kara jbd2_journal_stop(handle); 7272d01ddc8SJan Kara goto write_directly; 7282d01ddc8SJan Kara } 7292d01ddc8SJan Kara jbd2_journal_stop(handle); 730d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7312d01ddc8SJan Kara return; 7322d01ddc8SJan Kara } 7332d01ddc8SJan Kara write_directly: 7342d01ddc8SJan Kara /* 7352d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7362d01ddc8SJan Kara * out and hope for the best. 7372d01ddc8SJan Kara */ 7384392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 739d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 740ac27a0ecSDave Kleikamp } 741ac27a0ecSDave Kleikamp 742efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 743efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 744efbed4dcSTheodore Ts'o "EXT4-fs error") 745efbed4dcSTheodore Ts'o 74612062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 747014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 74854d3adbcSTheodore Ts'o const char *fmt, ...) 749ac27a0ecSDave Kleikamp { 7500ff2ea7dSJoe Perches struct va_format vaf; 751ac27a0ecSDave Kleikamp va_list args; 752ac27a0ecSDave Kleikamp 7530db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7540db1ff22STheodore Ts'o return; 7550db1ff22STheodore Ts'o 756ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 757efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 758ac27a0ecSDave Kleikamp va_start(args, fmt); 7590ff2ea7dSJoe Perches vaf.fmt = fmt; 7600ff2ea7dSJoe Perches vaf.va = &args; 761efbed4dcSTheodore Ts'o printk(KERN_CRIT 762efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7630ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 764ac27a0ecSDave Kleikamp va_end(args); 765efbed4dcSTheodore Ts'o } 7669a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7679a089b21SGabriel Krisman Bertazi 768e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 769ac27a0ecSDave Kleikamp } 770ac27a0ecSDave Kleikamp 771e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 77254d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 773273df556SFrank Mayhar const char *fmt, ...) 774273df556SFrank Mayhar { 775273df556SFrank Mayhar va_list args; 776f7c21177STheodore Ts'o struct va_format vaf; 777273df556SFrank Mayhar 7780db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7790db1ff22STheodore Ts'o return; 7800db1ff22STheodore Ts'o 781ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 782efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 783273df556SFrank Mayhar va_start(args, fmt); 784f7c21177STheodore Ts'o vaf.fmt = fmt; 785f7c21177STheodore Ts'o vaf.va = &args; 786c398eda0STheodore Ts'o if (block) 787d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 788d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 789d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 790d9ee81daSJoe Perches block, current->comm, &vaf); 791d9ee81daSJoe Perches else 792d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 793d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 794d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 795d9ee81daSJoe Perches current->comm, &vaf); 796273df556SFrank Mayhar va_end(args); 797efbed4dcSTheodore Ts'o } 7989a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 7999a089b21SGabriel Krisman Bertazi 800e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 80154d3adbcSTheodore Ts'o function, line); 802273df556SFrank Mayhar } 803273df556SFrank Mayhar 804e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 805f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 806f7c21177STheodore Ts'o const char *fmt, ...) 807273df556SFrank Mayhar { 808273df556SFrank Mayhar va_list args; 809f7c21177STheodore Ts'o struct va_format vaf; 810496ad9aaSAl Viro struct inode *inode = file_inode(file); 811273df556SFrank Mayhar char pathname[80], *path; 812273df556SFrank Mayhar 8130db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8140db1ff22STheodore Ts'o return; 8150db1ff22STheodore Ts'o 816ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 817efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8189bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 819f9a62d09SDan Carpenter if (IS_ERR(path)) 820273df556SFrank Mayhar path = "(unknown)"; 821f7c21177STheodore Ts'o va_start(args, fmt); 822f7c21177STheodore Ts'o vaf.fmt = fmt; 823f7c21177STheodore Ts'o vaf.va = &args; 824d9ee81daSJoe Perches if (block) 825d9ee81daSJoe Perches printk(KERN_CRIT 826d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 827d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 828d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 829d9ee81daSJoe Perches block, current->comm, path, &vaf); 830d9ee81daSJoe Perches else 831d9ee81daSJoe Perches printk(KERN_CRIT 832d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 833d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 834d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 835d9ee81daSJoe Perches current->comm, path, &vaf); 836273df556SFrank Mayhar va_end(args); 837efbed4dcSTheodore Ts'o } 8389a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8399a089b21SGabriel Krisman Bertazi 840e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 84154d3adbcSTheodore Ts'o function, line); 842273df556SFrank Mayhar } 843273df556SFrank Mayhar 844722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 845ac27a0ecSDave Kleikamp char nbuf[16]) 846ac27a0ecSDave Kleikamp { 847ac27a0ecSDave Kleikamp char *errstr = NULL; 848ac27a0ecSDave Kleikamp 849ac27a0ecSDave Kleikamp switch (errno) { 8506a797d27SDarrick J. Wong case -EFSCORRUPTED: 8516a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8526a797d27SDarrick J. Wong break; 8536a797d27SDarrick J. Wong case -EFSBADCRC: 8546a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8556a797d27SDarrick J. Wong break; 856ac27a0ecSDave Kleikamp case -EIO: 857ac27a0ecSDave Kleikamp errstr = "IO failure"; 858ac27a0ecSDave Kleikamp break; 859ac27a0ecSDave Kleikamp case -ENOMEM: 860ac27a0ecSDave Kleikamp errstr = "Out of memory"; 861ac27a0ecSDave Kleikamp break; 862ac27a0ecSDave Kleikamp case -EROFS: 86378f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 86478f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 865ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 866ac27a0ecSDave Kleikamp else 867ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 868ac27a0ecSDave Kleikamp break; 869ac27a0ecSDave Kleikamp default: 870ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 871ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 872ac27a0ecSDave Kleikamp * NULL. */ 873ac27a0ecSDave Kleikamp if (nbuf) { 874ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 875ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 876ac27a0ecSDave Kleikamp errstr = nbuf; 877ac27a0ecSDave Kleikamp } 878ac27a0ecSDave Kleikamp break; 879ac27a0ecSDave Kleikamp } 880ac27a0ecSDave Kleikamp 881ac27a0ecSDave Kleikamp return errstr; 882ac27a0ecSDave Kleikamp } 883ac27a0ecSDave Kleikamp 884617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 885ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 886ac27a0ecSDave Kleikamp 887c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 888c398eda0STheodore Ts'o unsigned int line, int errno) 889ac27a0ecSDave Kleikamp { 890ac27a0ecSDave Kleikamp char nbuf[16]; 891ac27a0ecSDave Kleikamp const char *errstr; 892ac27a0ecSDave Kleikamp 8930db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 8940db1ff22STheodore Ts'o return; 8950db1ff22STheodore Ts'o 896ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 897ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 898ac27a0ecSDave Kleikamp * an error. */ 899bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 900ac27a0ecSDave Kleikamp return; 901ac27a0ecSDave Kleikamp 902efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 903617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 904c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 905c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 906efbed4dcSTheodore Ts'o } 9079a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 908ac27a0ecSDave Kleikamp 909e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 910ac27a0ecSDave Kleikamp } 911ac27a0ecSDave Kleikamp 912e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 913e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 914b31e1552SEric Sandeen { 9150ff2ea7dSJoe Perches struct va_format vaf; 916b31e1552SEric Sandeen va_list args; 917b31e1552SEric Sandeen 9181cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 919efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 920efbed4dcSTheodore Ts'o return; 921efbed4dcSTheodore Ts'o 922b31e1552SEric Sandeen va_start(args, fmt); 9230ff2ea7dSJoe Perches vaf.fmt = fmt; 9240ff2ea7dSJoe Perches vaf.va = &args; 9250ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 926b31e1552SEric Sandeen va_end(args); 927b31e1552SEric Sandeen } 928b31e1552SEric Sandeen 9291cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9301cf006edSDmitry Monakhov { 9311cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9321cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9331cf006edSDmitry Monakhov "EXT4-fs warning"); 9341cf006edSDmitry Monakhov } 935b03a2f7eSAndreas Dilger 93612062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 937c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 938ac27a0ecSDave Kleikamp { 9390ff2ea7dSJoe Perches struct va_format vaf; 940ac27a0ecSDave Kleikamp va_list args; 941ac27a0ecSDave Kleikamp 942b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 943efbed4dcSTheodore Ts'o return; 944efbed4dcSTheodore Ts'o 945ac27a0ecSDave Kleikamp va_start(args, fmt); 9460ff2ea7dSJoe Perches vaf.fmt = fmt; 9470ff2ea7dSJoe Perches vaf.va = &args; 9480ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9490ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 950ac27a0ecSDave Kleikamp va_end(args); 951ac27a0ecSDave Kleikamp } 952ac27a0ecSDave Kleikamp 953b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 954b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 955b03a2f7eSAndreas Dilger { 956b03a2f7eSAndreas Dilger struct va_format vaf; 957b03a2f7eSAndreas Dilger va_list args; 958b03a2f7eSAndreas Dilger 959b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 960b03a2f7eSAndreas Dilger return; 961b03a2f7eSAndreas Dilger 962b03a2f7eSAndreas Dilger va_start(args, fmt); 963b03a2f7eSAndreas Dilger vaf.fmt = fmt; 964b03a2f7eSAndreas Dilger vaf.va = &args; 965b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 966b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 967b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 968b03a2f7eSAndreas Dilger va_end(args); 969b03a2f7eSAndreas Dilger } 970b03a2f7eSAndreas Dilger 971e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 972e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 973e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 974e29136f8STheodore Ts'o const char *fmt, ...) 9755d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9765d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9775d1b1b3fSAneesh Kumar K.V { 9780ff2ea7dSJoe Perches struct va_format vaf; 9795d1b1b3fSAneesh Kumar K.V va_list args; 9805d1b1b3fSAneesh Kumar K.V 9810db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9820db1ff22STheodore Ts'o return; 9830db1ff22STheodore Ts'o 984ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 985efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 9865d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 9870ff2ea7dSJoe Perches vaf.fmt = fmt; 9880ff2ea7dSJoe Perches vaf.va = &args; 98921149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 990e29136f8STheodore Ts'o sb->s_id, function, line, grp); 991e29136f8STheodore Ts'o if (ino) 9920ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 993e29136f8STheodore Ts'o if (block) 994efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 995efbed4dcSTheodore Ts'o (unsigned long long) block); 9960ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 9975d1b1b3fSAneesh Kumar K.V va_end(args); 998efbed4dcSTheodore Ts'o } 9995d1b1b3fSAneesh Kumar K.V 1000c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1001327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1002327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1003e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10042d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10052d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10062d01ddc8SJan Kara line); 1007c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10082d01ddc8SJan Kara } 10095d1b1b3fSAneesh Kumar K.V return; 10105d1b1b3fSAneesh Kumar K.V } 10115d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1012e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10135d1b1b3fSAneesh Kumar K.V /* 10145d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10155d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10165d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10175d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10185d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 101925985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10205d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10215d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10225d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10235d1b1b3fSAneesh Kumar K.V */ 10245d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10255d1b1b3fSAneesh Kumar K.V return; 10265d1b1b3fSAneesh Kumar K.V } 10275d1b1b3fSAneesh Kumar K.V 1028db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1029db79e6d1SWang Shilong ext4_group_t group, 1030db79e6d1SWang Shilong unsigned int flags) 1031db79e6d1SWang Shilong { 1032db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1033db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1034db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10359af0b3d1SWang Shilong int ret; 1036db79e6d1SWang Shilong 10379af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10389af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10399af0b3d1SWang Shilong &grp->bb_state); 10409af0b3d1SWang Shilong if (!ret) 1041db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1042db79e6d1SWang Shilong grp->bb_free); 1043db79e6d1SWang Shilong } 1044db79e6d1SWang Shilong 10459af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10469af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10479af0b3d1SWang Shilong &grp->bb_state); 10489af0b3d1SWang Shilong if (!ret && gdp) { 1049db79e6d1SWang Shilong int count; 1050db79e6d1SWang Shilong 1051db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1052db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1053db79e6d1SWang Shilong count); 1054db79e6d1SWang Shilong } 1055db79e6d1SWang Shilong } 1056db79e6d1SWang Shilong } 1057db79e6d1SWang Shilong 1058617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1059ac27a0ecSDave Kleikamp { 1060617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1061ac27a0ecSDave Kleikamp 1062617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1063ac27a0ecSDave Kleikamp return; 1064ac27a0ecSDave Kleikamp 106512062dddSEric Sandeen ext4_warning(sb, 1066ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1067ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1068617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1069ac27a0ecSDave Kleikamp 1070617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1071617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1072617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1073ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1074ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1075ac27a0ecSDave Kleikamp 1076ac27a0ecSDave Kleikamp /* 1077ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1078ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1079ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1080ac27a0ecSDave Kleikamp */ 1081ac27a0ecSDave Kleikamp } 1082ac27a0ecSDave Kleikamp 1083ac27a0ecSDave Kleikamp /* 1084ac27a0ecSDave Kleikamp * Open the external journal device 1085ac27a0ecSDave Kleikamp */ 1086b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1087ac27a0ecSDave Kleikamp { 1088ac27a0ecSDave Kleikamp struct block_device *bdev; 1089ac27a0ecSDave Kleikamp 1090d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1091ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1092ac27a0ecSDave Kleikamp goto fail; 1093ac27a0ecSDave Kleikamp return bdev; 1094ac27a0ecSDave Kleikamp 1095ac27a0ecSDave Kleikamp fail: 1096ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1097ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1098ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1099ac27a0ecSDave Kleikamp return NULL; 1100ac27a0ecSDave Kleikamp } 1101ac27a0ecSDave Kleikamp 1102ac27a0ecSDave Kleikamp /* 1103ac27a0ecSDave Kleikamp * Release the journal device 1104ac27a0ecSDave Kleikamp */ 11054385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1106ac27a0ecSDave Kleikamp { 11074385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1108ac27a0ecSDave Kleikamp } 1109ac27a0ecSDave Kleikamp 11104385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1111ac27a0ecSDave Kleikamp { 1112ac27a0ecSDave Kleikamp struct block_device *bdev; 1113ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1114ac27a0ecSDave Kleikamp if (bdev) { 11154385bab1SAl Viro ext4_blkdev_put(bdev); 1116ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1117ac27a0ecSDave Kleikamp } 1118ac27a0ecSDave Kleikamp } 1119ac27a0ecSDave Kleikamp 1120ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1121ac27a0ecSDave Kleikamp { 1122617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1123ac27a0ecSDave Kleikamp } 1124ac27a0ecSDave Kleikamp 1125617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1126ac27a0ecSDave Kleikamp { 1127ac27a0ecSDave Kleikamp struct list_head *l; 1128ac27a0ecSDave Kleikamp 1129b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1130ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1131ac27a0ecSDave Kleikamp 1132ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1133ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1134ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1135ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1136ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1137ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1138ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1139ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1140ac27a0ecSDave Kleikamp } 1141ac27a0ecSDave Kleikamp } 1142ac27a0ecSDave Kleikamp 1143957153fcSJan Kara #ifdef CONFIG_QUOTA 1144957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1145957153fcSJan Kara 1146957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1147957153fcSJan Kara { 1148957153fcSJan Kara int type; 1149957153fcSJan Kara 1150957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1151957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1152957153fcSJan Kara ext4_quota_off(sb, type); 1153957153fcSJan Kara } 115433458eabSTheodore Ts'o 115533458eabSTheodore Ts'o /* 115633458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 115733458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 115833458eabSTheodore Ts'o */ 115933458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 116033458eabSTheodore Ts'o struct ext4_sb_info *sbi, 116133458eabSTheodore Ts'o int type) 116233458eabSTheodore Ts'o { 116333458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 116433458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 116533458eabSTheodore Ts'o } 1166957153fcSJan Kara #else 1167957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1168957153fcSJan Kara { 1169957153fcSJan Kara } 1170957153fcSJan Kara #endif 1171957153fcSJan Kara 1172617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1173ac27a0ecSDave Kleikamp { 1174617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1175617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11761d0c3924STheodore Ts'o struct buffer_head **group_desc; 11777c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 117897abd7d4STheodore Ts'o int aborted = 0; 1179ef2cabf7SHidehiro Kawai int i, err; 1180ac27a0ecSDave Kleikamp 1181857ac889SLukas Czerner ext4_unregister_li_request(sb); 1182957153fcSJan Kara ext4_quota_off_umount(sb); 1183e0ccfd95SChristoph Hellwig 1184c92dc856SJan Kara flush_work(&sbi->s_error_work); 11852e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 118602f310fcSJan Kara ext4_release_orphan_info(sb); 11874c0425ffSMingming Cao 11885e47868fSRitesh Harjani /* 11895e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 11905e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 11915e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 11925e47868fSRitesh Harjani */ 11935e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 11945e47868fSRitesh Harjani 11950390131bSFrank Mayhar if (sbi->s_journal) { 119697abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1197ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 119847b4a50bSJan Kara sbi->s_journal = NULL; 1199878520acSTheodore Ts'o if ((err < 0) && !aborted) { 120054d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12010390131bSFrank Mayhar } 1202878520acSTheodore Ts'o } 1203d4edac31SJosef Bacik 1204d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12059105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1206d4edac31SJosef Bacik ext4_release_system_zone(sb); 1207d4edac31SJosef Bacik ext4_mb_release(sb); 1208d4edac31SJosef Bacik ext4_ext_release(sb); 1209d4edac31SJosef Bacik 1210bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1211e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 121202f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1213ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1214ac27a0ecSDave Kleikamp } 1215bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12164392fbc4SJan Kara ext4_commit_super(sb); 1217a8e25a83SArtem Bityutskiy 12181d0c3924STheodore Ts'o rcu_read_lock(); 12191d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1220ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12211d0c3924STheodore Ts'o brelse(group_desc[i]); 12221d0c3924STheodore Ts'o kvfree(group_desc); 12237c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12247c990728SSuraj Jitindar Singh if (flex_groups) { 12257c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12267c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12277c990728SSuraj Jitindar Singh kvfree(flex_groups); 12287c990728SSuraj Jitindar Singh } 12291d0c3924STheodore Ts'o rcu_read_unlock(); 123057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1231ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1232ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 123357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1234efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1235bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1236ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1237a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 123833458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1239ac27a0ecSDave Kleikamp #endif 1240ac27a0ecSDave Kleikamp 1241ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1242ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1243ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1244ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1245ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1246ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1247837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1248ac27a0ecSDave Kleikamp 124989d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1250f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1251ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1252ac27a0ecSDave Kleikamp /* 1253ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1254ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1255ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1256ac27a0ecSDave Kleikamp */ 1257ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1258ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1259617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1260ac27a0ecSDave Kleikamp } 126150c15df6SChengguang Xu 1262dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1263dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 126450c15df6SChengguang Xu 126547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 126647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 126750c15df6SChengguang Xu 1268618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1269618f0031SPavel Skripkin 12709060dd2cSEric Sandeen brelse(sbi->s_sbh); 1271ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12723197ebdbSTheodore Ts'o /* 12733197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12743197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12753197ebdbSTheodore Ts'o */ 12763197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 12773197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 12780441984aSDarrick J. Wong if (sbi->s_chksum_driver) 12790441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1280705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 12815e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1282ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 1283c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1284f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1285c83ad55eSGabriel Krisman Bertazi #endif 1286ac27a0ecSDave Kleikamp kfree(sbi); 1287ac27a0ecSDave Kleikamp } 1288ac27a0ecSDave Kleikamp 1289e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1290ac27a0ecSDave Kleikamp 1291ac27a0ecSDave Kleikamp /* 1292ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1293ac27a0ecSDave Kleikamp */ 1294617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1295ac27a0ecSDave Kleikamp { 1296617ba13bSMingming Cao struct ext4_inode_info *ei; 1297ac27a0ecSDave Kleikamp 1298e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1299ac27a0ecSDave Kleikamp if (!ei) 1300ac27a0ecSDave Kleikamp return NULL; 13010b8e58a1SAndreas Dilger 1302ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1303202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1304c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 130527bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1306c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13079a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13089a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1309edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1310eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1311edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1312dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1313d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1314d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13151dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1316a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1317a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 131896c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1319a9e7f447SDmitry Monakhov #endif 13208aefcd55STheodore Ts'o ei->jinode = NULL; 13212e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1322744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1323b436b9beSJan Kara ei->i_sync_tid = 0; 1324b436b9beSJan Kara ei->i_datasync_tid = 0; 1325e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13262e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1327aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1328aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1329ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1330ac27a0ecSDave Kleikamp } 1331ac27a0ecSDave Kleikamp 13327ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13337ff9c073STheodore Ts'o { 13347ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13357ff9c073STheodore Ts'o 133629b3692eSEric Biggers if (!drop) 133729b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 133829b3692eSEric Biggers 13397ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13407ff9c073STheodore Ts'o return drop; 13417ff9c073STheodore Ts'o } 13427ff9c073STheodore Ts'o 134394053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1344fa0d7e3dSNick Piggin { 13452c58d548SEric Biggers fscrypt_free_inode(inode); 1346aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1347aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1348aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1349aa75f4d3SHarshad Shirwadkar } 1350fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1351fa0d7e3dSNick Piggin } 1352fa0d7e3dSNick Piggin 1353617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1354ac27a0ecSDave Kleikamp { 13559f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1356b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1357b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1358b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13599f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13609f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13619f7dd93dSVasily Averin true); 13629f7dd93dSVasily Averin dump_stack(); 13639f7dd93dSVasily Averin } 13646fed8395SJeffle Xu 13656fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13666fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13676fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13686fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13696fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1370ac27a0ecSDave Kleikamp } 1371ac27a0ecSDave Kleikamp 137251cc5068SAlexey Dobriyan static void init_once(void *foo) 1373ac27a0ecSDave Kleikamp { 1374617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1375ac27a0ecSDave Kleikamp 1376ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1377ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 13780e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1379ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1380aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1381ac27a0ecSDave Kleikamp } 1382ac27a0ecSDave Kleikamp 1383e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1384ac27a0ecSDave Kleikamp { 1385f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1386f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1387f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1388f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1389f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1390f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 139120c2df83SPaul Mundt init_once); 1392617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1393ac27a0ecSDave Kleikamp return -ENOMEM; 1394ac27a0ecSDave Kleikamp return 0; 1395ac27a0ecSDave Kleikamp } 1396ac27a0ecSDave Kleikamp 1397ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1398ac27a0ecSDave Kleikamp { 13998c0a8537SKirill A. Shutemov /* 14008c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14018c0a8537SKirill A. Shutemov * destroy cache. 14028c0a8537SKirill A. Shutemov */ 14038c0a8537SKirill A. Shutemov rcu_barrier(); 1404617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1405ac27a0ecSDave Kleikamp } 1406ac27a0ecSDave Kleikamp 14070930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1408ac27a0ecSDave Kleikamp { 1409aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14100930fcc1SAl Viro invalidate_inode_buffers(inode); 1411dbd5768fSJan Kara clear_inode(inode); 141227bc446eSbrookxu ext4_discard_preallocations(inode, 0); 141351865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1414f4c2d372SJan Kara dquot_drop(inode); 14158aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14168aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14178aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14188aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14198aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14208aefcd55STheodore Ts'o } 14213d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1422c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1423ac27a0ecSDave Kleikamp } 1424ac27a0ecSDave Kleikamp 14251b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14261b961ac0SChristoph Hellwig u64 ino, u32 generation) 1427ac27a0ecSDave Kleikamp { 1428ac27a0ecSDave Kleikamp struct inode *inode; 1429ac27a0ecSDave Kleikamp 14308a363970STheodore Ts'o /* 1431ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1432ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1433ac27a0ecSDave Kleikamp */ 14348a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14351d1fe1eeSDavid Howells if (IS_ERR(inode)) 14361d1fe1eeSDavid Howells return ERR_CAST(inode); 14371d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1438ac27a0ecSDave Kleikamp iput(inode); 1439ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1440ac27a0ecSDave Kleikamp } 14411b961ac0SChristoph Hellwig 14421b961ac0SChristoph Hellwig return inode; 1443ac27a0ecSDave Kleikamp } 14441b961ac0SChristoph Hellwig 14451b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14461b961ac0SChristoph Hellwig int fh_len, int fh_type) 14471b961ac0SChristoph Hellwig { 14481b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14491b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14501b961ac0SChristoph Hellwig } 14511b961ac0SChristoph Hellwig 14521b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14531b961ac0SChristoph Hellwig int fh_len, int fh_type) 14541b961ac0SChristoph Hellwig { 14551b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14561b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1457ac27a0ecSDave Kleikamp } 1458ac27a0ecSDave Kleikamp 1459fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1460fde87268STheodore Ts'o { 1461fde87268STheodore Ts'o struct writeback_control wbc = { 1462fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1463fde87268STheodore Ts'o }; 1464fde87268STheodore Ts'o 1465fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1466fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1467fde87268STheodore Ts'o } 1468fde87268STheodore Ts'o 1469643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1470a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1471a7550b30SJaegeuk Kim { 1472a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1473a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1474a7550b30SJaegeuk Kim } 1475a7550b30SJaegeuk Kim 1476a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1477a7550b30SJaegeuk Kim void *fs_data) 1478a7550b30SJaegeuk Kim { 14792f8f5e76SEric Biggers handle_t *handle = fs_data; 1480c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1481a7550b30SJaegeuk Kim 14829ce0151aSEric Biggers /* 14839ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 14849ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 14859ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 14869ce0151aSEric Biggers * the filename "lost+found" itself. 14879ce0151aSEric Biggers */ 14889ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 14899ce0151aSEric Biggers return -EPERM; 1490a7550b30SJaegeuk Kim 14917d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 14927d3e06a8SRoss Zwisler return -EINVAL; 14937d3e06a8SRoss Zwisler 1494b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1495b383a73fSIra Weiny return -EOPNOTSUPP; 1496b383a73fSIra Weiny 149794840e3cSEric Biggers res = ext4_convert_inline_data(inode); 149894840e3cSEric Biggers if (res) 149994840e3cSEric Biggers return res; 150094840e3cSEric Biggers 15012f8f5e76SEric Biggers /* 15022f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 15032f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 15042f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 15052f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 15062f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 15072f8f5e76SEric Biggers */ 15082f8f5e76SEric Biggers 15092f8f5e76SEric Biggers if (handle) { 15102f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 15112f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 15122f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15132f8f5e76SEric Biggers ctx, len, 0); 1514a7550b30SJaegeuk Kim if (!res) { 1515a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1516a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1517a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1518a3caa24bSJan Kara /* 15192ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15202ee6a576SEric Biggers * S_DAX may be disabled 1521a3caa24bSJan Kara */ 1522043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1523a7550b30SJaegeuk Kim } 1524a7550b30SJaegeuk Kim return res; 1525a7550b30SJaegeuk Kim } 1526a7550b30SJaegeuk Kim 1527b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1528b8cb5a54STahsin Erdogan if (res) 1529b8cb5a54STahsin Erdogan return res; 15302f8f5e76SEric Biggers retry: 1531af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1532af65207cSTahsin Erdogan &credits); 1533dec214d0STahsin Erdogan if (res) 1534dec214d0STahsin Erdogan return res; 1535dec214d0STahsin Erdogan 1536c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1537a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1538a7550b30SJaegeuk Kim return PTR_ERR(handle); 1539a7550b30SJaegeuk Kim 15402f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 15412f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 15422f8f5e76SEric Biggers ctx, len, 0); 1543a7550b30SJaegeuk Kim if (!res) { 1544a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 15452ee6a576SEric Biggers /* 15462ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 15472ee6a576SEric Biggers * S_DAX may be disabled 15482ee6a576SEric Biggers */ 1549043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1550a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1551a7550b30SJaegeuk Kim if (res) 1552a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1553a7550b30SJaegeuk Kim } 1554a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 15552f8f5e76SEric Biggers 15562f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 15572f8f5e76SEric Biggers goto retry; 1558a7550b30SJaegeuk Kim if (!res) 1559a7550b30SJaegeuk Kim res = res2; 1560a7550b30SJaegeuk Kim return res; 1561a7550b30SJaegeuk Kim } 1562a7550b30SJaegeuk Kim 1563ac4acb1fSEric Biggers static const union fscrypt_policy *ext4_get_dummy_policy(struct super_block *sb) 1564a7550b30SJaegeuk Kim { 1565ac4acb1fSEric Biggers return EXT4_SB(sb)->s_dummy_enc_policy.policy; 1566a7550b30SJaegeuk Kim } 1567a7550b30SJaegeuk Kim 1568b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1569b925acb8SEric Biggers { 1570b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1571b925acb8SEric Biggers } 1572b925acb8SEric Biggers 1573b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1574b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1575b925acb8SEric Biggers { 1576b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1577b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1578b925acb8SEric Biggers } 1579b925acb8SEric Biggers 15806f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1581a5d431efSEric Biggers .key_prefix = "ext4:", 1582a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1583a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1584ac4acb1fSEric Biggers .get_dummy_policy = ext4_get_dummy_policy, 1585a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1586b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1587b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1588a7550b30SJaegeuk Kim }; 1589a7550b30SJaegeuk Kim #endif 1590a7550b30SJaegeuk Kim 1591ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1592d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1593689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1594ac27a0ecSDave Kleikamp 1595617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1596617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1597617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1598617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1599617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 16006f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 16018c54ca9cSAl Viro const struct path *path); 1602617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1603ac27a0ecSDave Kleikamp size_t len, loff_t off); 1604617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1605ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 16067c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 16077c319d32SAditya Kali unsigned int flags); 1608ac27a0ecSDave Kleikamp 160996c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 161096c7e0d9SJan Kara { 161196c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 161296c7e0d9SJan Kara } 161396c7e0d9SJan Kara 161461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 161560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1616617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1617617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1618617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1619617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1620a5b5ee32SJan Kara .write_info = ext4_write_info, 1621a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1622a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1623040cb378SLi Xi .get_projid = ext4_get_projid, 16247a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1625ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1626ac27a0ecSDave Kleikamp }; 1627ac27a0ecSDave Kleikamp 16280d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1629617ba13bSMingming Cao .quota_on = ext4_quota_on, 1630ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1631287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16320a240339SJan Kara .get_state = dquot_get_state, 1633287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1634287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16356332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16366332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1637ac27a0ecSDave Kleikamp }; 1638ac27a0ecSDave Kleikamp #endif 1639ac27a0ecSDave Kleikamp 1640ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1641617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 164294053139SAl Viro .free_inode = ext4_free_in_core_inode, 1643617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1644617ba13bSMingming Cao .write_inode = ext4_write_inode, 1645617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16467ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16470930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1648617ba13bSMingming Cao .put_super = ext4_put_super, 1649617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1650c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1651c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1652617ba13bSMingming Cao .statfs = ext4_statfs, 1653617ba13bSMingming Cao .remount_fs = ext4_remount, 1654617ba13bSMingming Cao .show_options = ext4_show_options, 1655ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1656617ba13bSMingming Cao .quota_read = ext4_quota_read, 1657617ba13bSMingming Cao .quota_write = ext4_quota_write, 165896c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1659ac27a0ecSDave Kleikamp #endif 1660ac27a0ecSDave Kleikamp }; 1661ac27a0ecSDave Kleikamp 166239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16631b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16641b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1665617ba13bSMingming Cao .get_parent = ext4_get_parent, 1666fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1667ac27a0ecSDave Kleikamp }; 1668ac27a0ecSDave Kleikamp 1669ac27a0ecSDave Kleikamp enum { 1670ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1671ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 167272578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1673ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 167472578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1675ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1676ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1677ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16786ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16794f74d15fSEric Biggers Opt_inlinecrypt, 1680ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 16815a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1682ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16839cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 16849cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1685327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1686327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1687670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 16881449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16895328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1690744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1691fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1692cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 169321175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1694e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 16958016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 169699c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16978016e29fSHarshad Shirwadkar #endif 1698ac27a0ecSDave Kleikamp }; 1699ac27a0ecSDave Kleikamp 1700e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1701e5a185c2SLukas Czerner {"continue", Opt_err_cont}, 1702e5a185c2SLukas Czerner {"panic", Opt_err_panic}, 1703e5a185c2SLukas Czerner {"remount-ro", Opt_err_ro}, 1704e5a185c2SLukas Czerner {} 1705e5a185c2SLukas Czerner }; 1706e5a185c2SLukas Czerner 1707e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1708e5a185c2SLukas Czerner {"journal", Opt_data_journal}, 1709e5a185c2SLukas Czerner {"ordered", Opt_data_ordered}, 1710e5a185c2SLukas Czerner {"writeback", Opt_data_writeback}, 1711e5a185c2SLukas Czerner {} 1712e5a185c2SLukas Czerner }; 1713e5a185c2SLukas Czerner 1714e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1715e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1716e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1717e5a185c2SLukas Czerner {} 1718e5a185c2SLukas Czerner }; 1719e5a185c2SLukas Czerner 1720e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1721e5a185c2SLukas Czerner {"vfsold", Opt_jqfmt_vfsold}, 1722e5a185c2SLukas Czerner {"vfsv0", Opt_jqfmt_vfsv0}, 1723e5a185c2SLukas Czerner {"vfsv1", Opt_jqfmt_vfsv1}, 1724e5a185c2SLukas Czerner {} 1725e5a185c2SLukas Czerner }; 1726e5a185c2SLukas Czerner 1727e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1728e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1729e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1730e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1731e5a185c2SLukas Czerner {} 1732e5a185c2SLukas Czerner }; 1733e5a185c2SLukas Czerner 1734e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1735e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1736e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1737e5a185c2SLukas Czerner 1738e5a185c2SLukas Czerner /* 1739e5a185c2SLukas Czerner * Mount option specification 1740e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1741e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1742e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1743e5a185c2SLukas Czerner * separate for now. 1744e5a185c2SLukas Czerner */ 1745e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1746e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1747e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1748e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1749e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1750e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1751e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1752e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1753e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1754e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1755e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1756e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1757e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1758e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1759e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1760e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1761e5a185c2SLukas Czerner fsparam_flag ("nouser_xattr", Opt_nouser_xattr), 1762e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1763e5a185c2SLukas Czerner fsparam_flag ("noacl", Opt_noacl), 1764e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1765e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1766e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1767e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1768e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1769e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1770e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1771e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1772e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1773e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1774e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1775e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1776e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1777e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1778e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1779e5a185c2SLukas Czerner ext4_param_data_err), 1780e5a185c2SLukas Czerner fsparam_string_empty 1781e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1782e5a185c2SLukas Czerner fsparam_string_empty 1783e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1784e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1785e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1786e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1787e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1788e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1789e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1790e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1791e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1792e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1793e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1794e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1795e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1796e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1797e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1798e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1799e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1800e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1801e5a185c2SLukas Czerner fsparam_flag ("lazytime", Opt_lazytime), 1802e5a185c2SLukas Czerner fsparam_flag ("nolazytime", Opt_nolazytime), 1803e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1804e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1805e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1806e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1807e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1808e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1809e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1810e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1811e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1812e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1813e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1814e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1815e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1816e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1817e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1818e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1819e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1820e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1821e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1822e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1823e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1824e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1825e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1826e5a185c2SLukas Czerner #endif 1827e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1828e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1829e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1830e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1831e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1832e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1833e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1834e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1835e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1836e5a185c2SLukas Czerner Opt_removed), 1837e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1838e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1839e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1840e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1841e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1842e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1843e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1844e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1845e5a185c2SLukas Czerner {} 1846e5a185c2SLukas Czerner }; 1847e5a185c2SLukas Czerner 1848a447c093SSteven Whitehouse static const match_table_t tokens = { 1849ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1850ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1851ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1852ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1853ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1854ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1855ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1856ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1857ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1858ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1859ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1860ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1861ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1862ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 186372578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 186472578c33STheodore Ts'o {Opt_removed, "orlov"}, 1865ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1866ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1867ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1868ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1869e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 18705a916be1STheodore Ts'o {Opt_noload, "noload"}, 187172578c33STheodore Ts'o {Opt_removed, "nobh"}, 187272578c33STheodore Ts'o {Opt_removed, "bh"}, 1873ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 187430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 187530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1876ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1877ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1878818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1879c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1880818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1881ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1882ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1883ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1884ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 18855bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 18865bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1887ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1888ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1889ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1890ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1891ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1892ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 18935a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1894ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1895ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1896ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1897ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 189849da9392SJan Kara {Opt_prjquota, "prjquota"}, 1899ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 190006705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 190106705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 190225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1903923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 19049cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 19059cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 19069cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1907c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 190864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1909327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1910327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1911a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1912a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1913670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1914dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 191536ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 191636ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 19176fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 19186fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1919240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1920b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1921afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 192206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 192306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1924744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1925244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1926744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 19275328e635SEric Sandeen {Opt_discard, "discard"}, 19285328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1929fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1930fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1931fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 19328016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 193399c880deSHarshad Shirwadkar {Opt_fc_debug_force, "fc_debug_force"}, 19348016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, "fc_debug_max_replay=%u"}, 19358016e29fSHarshad Shirwadkar #endif 1936df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1937ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 19386ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 19394f74d15fSEric Biggers {Opt_inlinecrypt, "inlinecrypt"}, 1940cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1941cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 194221175ca4SHarshad Shirwadkar {Opt_removed, "prefetch_block_bitmaps"}, 194321175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, 1944196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, 1945c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1946c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1947c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1948c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1949c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1950f3f12faaSJosef Bacik {Opt_err, NULL}, 1951ac27a0ecSDave Kleikamp }; 1952ac27a0ecSDave Kleikamp 1953617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1954ac27a0ecSDave Kleikamp { 1955617ba13bSMingming Cao ext4_fsblk_t sb_block; 1956ac27a0ecSDave Kleikamp char *options = (char *) *data; 1957ac27a0ecSDave Kleikamp 1958ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1959ac27a0ecSDave Kleikamp return 1; /* Default location */ 19600b8e58a1SAndreas Dilger 1961ac27a0ecSDave Kleikamp options += 3; 19620b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1963ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1964ac27a0ecSDave Kleikamp if (*options && *options != ',') { 19654776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1966ac27a0ecSDave Kleikamp (char *) *data); 1967ac27a0ecSDave Kleikamp return 1; 1968ac27a0ecSDave Kleikamp } 1969ac27a0ecSDave Kleikamp if (*options == ',') 1970ac27a0ecSDave Kleikamp options++; 1971ac27a0ecSDave Kleikamp *data = (void *) options; 19720b8e58a1SAndreas Dilger 1973ac27a0ecSDave Kleikamp return sb_block; 1974ac27a0ecSDave Kleikamp } 1975ac27a0ecSDave Kleikamp 1976b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1977196e402aSHarshad Shirwadkar #define DEFAULT_MB_OPTIMIZE_SCAN (-1) 1978196e402aSHarshad Shirwadkar 1979d6006186SEric Biggers static const char deprecated_msg[] = 1980d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1981437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1982b3881f74STheodore Ts'o 198356c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 1984*461c3af0SLukas Czerner static int set_qf_name(struct super_block *sb, int qtype, 1985*461c3af0SLukas Czerner struct fs_parameter *param) 198656c50f11SDmitry Monakhov { 198756c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 198833458eabSTheodore Ts'o char *qname, *old_qname = get_qf_name(sb, sbi, qtype); 198903dafb5fSChen Gang int ret = -1; 199056c50f11SDmitry Monakhov 199133458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && !old_qname) { 199256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 199356c50f11SDmitry Monakhov "Cannot change journaled " 199456c50f11SDmitry Monakhov "quota options when quota turned on"); 199557f73c2cSTheodore Ts'o return -1; 199656c50f11SDmitry Monakhov } 1997e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1998c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1999c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 2000c325a67cSTheodore Ts'o return 1; 2001262b4662SJan Kara } 2002*461c3af0SLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 200356c50f11SDmitry Monakhov if (!qname) { 200456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 200556c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 200657f73c2cSTheodore Ts'o return -1; 200756c50f11SDmitry Monakhov } 200833458eabSTheodore Ts'o if (old_qname) { 200933458eabSTheodore Ts'o if (strcmp(old_qname, qname) == 0) 201003dafb5fSChen Gang ret = 1; 201103dafb5fSChen Gang else 201256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 201303dafb5fSChen Gang "%s quota file already specified", 201403dafb5fSChen Gang QTYPE2NAME(qtype)); 201503dafb5fSChen Gang goto errout; 201656c50f11SDmitry Monakhov } 201703dafb5fSChen Gang if (strchr(qname, '/')) { 201856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 201956c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 202003dafb5fSChen Gang goto errout; 202156c50f11SDmitry Monakhov } 202233458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], qname); 2023fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 202456c50f11SDmitry Monakhov return 1; 202503dafb5fSChen Gang errout: 202603dafb5fSChen Gang kfree(qname); 202703dafb5fSChen Gang return ret; 202856c50f11SDmitry Monakhov } 202956c50f11SDmitry Monakhov 203056c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 203156c50f11SDmitry Monakhov { 203256c50f11SDmitry Monakhov 203356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 203433458eabSTheodore Ts'o char *old_qname = get_qf_name(sb, sbi, qtype); 203556c50f11SDmitry Monakhov 203633458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && old_qname) { 203756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 203856c50f11SDmitry Monakhov " when quota turned on"); 203957f73c2cSTheodore Ts'o return -1; 204056c50f11SDmitry Monakhov } 204133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], NULL); 204233458eabSTheodore Ts'o synchronize_rcu(); 204333458eabSTheodore Ts'o kfree(old_qname); 204456c50f11SDmitry Monakhov return 1; 204556c50f11SDmitry Monakhov } 204656c50f11SDmitry Monakhov #endif 204756c50f11SDmitry Monakhov 204826092bf5STheodore Ts'o #define MOPT_SET 0x0001 204926092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 205026092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 205126092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 205226092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 205326092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 205426092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 205526092bf5STheodore Ts'o #define MOPT_Q 0 205626092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 205726092bf5STheodore Ts'o #else 205826092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 205926092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 206026092bf5STheodore Ts'o #endif 206126092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 20628dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 20638dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 20648dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 2065ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 20669cb20f94SIra Weiny #define MOPT_SKIP 0x0800 2067995a3ed6SHarshad Shirwadkar #define MOPT_2 0x1000 206826092bf5STheodore Ts'o 206926092bf5STheodore Ts'o static const struct mount_opts { 207026092bf5STheodore Ts'o int token; 207126092bf5STheodore Ts'o int mount_opt; 207226092bf5STheodore Ts'o int flags; 207326092bf5STheodore Ts'o } ext4_mount_opts[] = { 207426092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 207526092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 207626092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 207726092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 207826092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 207926092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 20808dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 20818dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 20828dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 20838dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 208426092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 208526092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 20868dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 20878dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20888dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 208959d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 2090327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 2091327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 2092c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 2093c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 20948dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 20951e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 209626092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 20978dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 20981e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 20998dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 210026092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 210126092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 210226092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 21038dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 21047915a861SAles Novak MOPT_NO_EXT2}, 21058dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 21067915a861SAles Novak MOPT_NO_EXT2}, 210726092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 210826092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 210926092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 211026092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 211126092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 211226092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 211326092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 211426092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 211526092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 211626092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 21179cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 21189cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 21199cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 21209cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 21219cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 21229cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 21239cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 212426092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 21250efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 21260efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 21275ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 21285ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 21295ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 21308dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 21318dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 21328dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 21338dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 213426092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 213526092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 213626092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 213726092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 213826092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 213926092bf5STheodore Ts'o #else 214026092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 214126092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 214226092bf5STheodore Ts'o #endif 214326092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 214426092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 2145670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 214626092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 214726092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 214826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 214926092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 215026092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 215149da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 215249da9392SJan Kara MOPT_SET | MOPT_Q}, 215326092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 215449da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 215549da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 2156174fe5baSKaixu Xia {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING}, 2157174fe5baSKaixu Xia {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING}, 215826092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 215926092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 216026092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 216126092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 216226092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 2163df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 2164ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 2165cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 216621175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 21673d392b26STheodore Ts'o MOPT_SET}, 2168196e402aSHarshad Shirwadkar {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, 216999c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 21700f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 21710f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 21728016e29fSHarshad Shirwadkar {Opt_fc_debug_max_replay, 0, MOPT_GTE0}, 21738016e29fSHarshad Shirwadkar #endif 217426092bf5STheodore Ts'o {Opt_err, 0, 0} 217526092bf5STheodore Ts'o }; 217626092bf5STheodore Ts'o 2177c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 2178c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 2179c83ad55eSGabriel Krisman Bertazi __u16 magic; 2180c83ad55eSGabriel Krisman Bertazi char *name; 2181c83ad55eSGabriel Krisman Bertazi char *version; 2182c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 2183c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 2184c83ad55eSGabriel Krisman Bertazi }; 2185c83ad55eSGabriel Krisman Bertazi 2186c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 2187c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 2188c83ad55eSGabriel Krisman Bertazi __u16 *flags) 2189c83ad55eSGabriel Krisman Bertazi { 2190c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 2191c83ad55eSGabriel Krisman Bertazi int i; 2192c83ad55eSGabriel Krisman Bertazi 2193c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 2194c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 2195c83ad55eSGabriel Krisman Bertazi break; 2196c83ad55eSGabriel Krisman Bertazi 2197c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 2198c83ad55eSGabriel Krisman Bertazi return -EINVAL; 2199c83ad55eSGabriel Krisman Bertazi 2200c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 2201c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 2202c83ad55eSGabriel Krisman Bertazi 2203c83ad55eSGabriel Krisman Bertazi return 0; 2204c83ad55eSGabriel Krisman Bertazi } 2205c83ad55eSGabriel Krisman Bertazi #endif 2206c83ad55eSGabriel Krisman Bertazi 2207ed318a6cSEric Biggers static int ext4_set_test_dummy_encryption(struct super_block *sb, 2208*461c3af0SLukas Czerner struct fs_parameter *param, 2209ed318a6cSEric Biggers bool is_remount) 2210ed318a6cSEric Biggers { 2211ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 2212ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 2213ed318a6cSEric Biggers int err; 2214ed318a6cSEric Biggers 2215ed318a6cSEric Biggers /* 2216ed318a6cSEric Biggers * This mount option is just for testing, and it's not worthwhile to 2217ed318a6cSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 2218ed318a6cSEric Biggers * needed to allow it to be set or changed during remount. We do allow 2219ed318a6cSEric Biggers * it to be specified during remount, but only if there is no change. 2220ed318a6cSEric Biggers */ 2221ac4acb1fSEric Biggers if (is_remount && !sbi->s_dummy_enc_policy.policy) { 2222ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2223ed318a6cSEric Biggers "Can't set test_dummy_encryption on remount"); 2224ed318a6cSEric Biggers return -1; 2225ed318a6cSEric Biggers } 2226*461c3af0SLukas Czerner err = fscrypt_set_test_dummy_encryption(sb, param->string, 2227ac4acb1fSEric Biggers &sbi->s_dummy_enc_policy); 2228ed318a6cSEric Biggers if (err) { 2229ed318a6cSEric Biggers if (err == -EEXIST) 2230ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2231ed318a6cSEric Biggers "Can't change test_dummy_encryption on remount"); 2232ed318a6cSEric Biggers else if (err == -EINVAL) 2233ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2234*461c3af0SLukas Czerner "Value of option \"%s\" is unrecognized", 2235*461c3af0SLukas Czerner param->key); 2236ed318a6cSEric Biggers else 2237ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2238ed318a6cSEric Biggers "Error processing option \"%s\" [%d]", 2239*461c3af0SLukas Czerner param->key, err); 2240ed318a6cSEric Biggers return -1; 2241ed318a6cSEric Biggers } 2242ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 2243ed318a6cSEric Biggers #else 2244ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 2245ed318a6cSEric Biggers "Test dummy encryption mount option ignored"); 2246ed318a6cSEric Biggers #endif 2247ed318a6cSEric Biggers return 1; 2248ed318a6cSEric Biggers } 2249ed318a6cSEric Biggers 2250*461c3af0SLukas Czerner struct ext4_fs_context { 2251b237e304SHarshad Shirwadkar unsigned long journal_devnum; 2252b237e304SHarshad Shirwadkar unsigned int journal_ioprio; 2253196e402aSHarshad Shirwadkar int mb_optimize_scan; 2254b237e304SHarshad Shirwadkar }; 2255b237e304SHarshad Shirwadkar 2256*461c3af0SLukas Czerner static int handle_mount_opt(struct fs_context *fc, struct fs_parameter *param) 225726092bf5STheodore Ts'o { 2258*461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2259*461c3af0SLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 2260*461c3af0SLukas Czerner struct super_block *sb = sbi->s_sb; 2261*461c3af0SLukas Czerner struct fs_parse_result result; 226226092bf5STheodore Ts'o const struct mount_opts *m; 2263*461c3af0SLukas Czerner int is_remount; 226408cefc7aSEric W. Biederman kuid_t uid; 226508cefc7aSEric W. Biederman kgid_t gid; 2266*461c3af0SLukas Czerner int token; 2267*461c3af0SLukas Czerner 2268*461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2269*461c3af0SLukas Czerner if (token < 0) 2270*461c3af0SLukas Czerner return token; 2271*461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 227226092bf5STheodore Ts'o 227357f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2274*461c3af0SLukas Czerner if (token == Opt_usrjquota) { 2275*461c3af0SLukas Czerner if (!*param->string) 227657f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 2277*461c3af0SLukas Czerner else 2278*461c3af0SLukas Czerner return set_qf_name(sb, USRQUOTA, param); 2279*461c3af0SLukas Czerner } else if (token == Opt_grpjquota) { 2280*461c3af0SLukas Czerner if (!*param->string) 228157f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 2282*461c3af0SLukas Czerner else 2283*461c3af0SLukas Czerner return set_qf_name(sb, GRPQUOTA, param); 2284*461c3af0SLukas Czerner } 228557f73c2cSTheodore Ts'o #endif 228626092bf5STheodore Ts'o switch (token) { 2287f7048605STheodore Ts'o case Opt_noacl: 2288f7048605STheodore Ts'o case Opt_nouser_xattr: 2289*461c3af0SLukas Czerner ext4_msg(sb, KERN_WARNING, deprecated_msg, param->key, "3.5"); 2290f7048605STheodore Ts'o break; 229126092bf5STheodore Ts'o case Opt_sb: 229226092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 229326092bf5STheodore Ts'o case Opt_removed: 2294*461c3af0SLukas Czerner ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", 2295*461c3af0SLukas Czerner param->key); 229626092bf5STheodore Ts'o return 1; 229726092bf5STheodore Ts'o case Opt_abort: 22989b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 229926092bf5STheodore Ts'o return 1; 230026092bf5STheodore Ts'o case Opt_i_version: 2301357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 230226092bf5STheodore Ts'o return 1; 2303a26f4992STheodore Ts'o case Opt_lazytime: 23041751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 2305a26f4992STheodore Ts'o return 1; 2306a26f4992STheodore Ts'o case Opt_nolazytime: 23071751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 2308a26f4992STheodore Ts'o return 1; 23094f74d15fSEric Biggers case Opt_inlinecrypt: 23104f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 23114f74d15fSEric Biggers sb->s_flags |= SB_INLINECRYPT; 23124f74d15fSEric Biggers #else 23134f74d15fSEric Biggers ext4_msg(sb, KERN_ERR, "inline encryption not supported"); 23144f74d15fSEric Biggers #endif 23154f74d15fSEric Biggers return 1; 2316*461c3af0SLukas Czerner case Opt_errors: 2317*461c3af0SLukas Czerner case Opt_data: 2318*461c3af0SLukas Czerner case Opt_data_err: 2319*461c3af0SLukas Czerner case Opt_jqfmt: 2320*461c3af0SLukas Czerner case Opt_dax_type: 2321*461c3af0SLukas Czerner token = result.uint_32; 232226092bf5STheodore Ts'o } 232326092bf5STheodore Ts'o 23245f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 23255f3633e3SJan Kara if (token == m->token) 23265f3633e3SJan Kara break; 23275f3633e3SJan Kara 23285f3633e3SJan Kara if (m->token == Opt_err) { 23295f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 2330*461c3af0SLukas Czerner "or missing value", param->key); 23315f3633e3SJan Kara return -1; 23325f3633e3SJan Kara } 23335f3633e3SJan Kara 23348dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 23358dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 2336*461c3af0SLukas Czerner "Mount option \"%s\" incompatible with ext2", 2337*461c3af0SLukas Czerner param->key); 23388dc0aa8cSTheodore Ts'o return -1; 23398dc0aa8cSTheodore Ts'o } 23408dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 23418dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 2342*461c3af0SLukas Czerner "Mount option \"%s\" incompatible with ext3", 2343*461c3af0SLukas Czerner param->key); 23448dc0aa8cSTheodore Ts'o return -1; 23458dc0aa8cSTheodore Ts'o } 23468dc0aa8cSTheodore Ts'o 2347c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 2348c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 234926092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 23501e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 23511e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 2352c93cf2d7SDmitry Monakhov } else 2353c93cf2d7SDmitry Monakhov return -1; 2354c93cf2d7SDmitry Monakhov } 235526092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 235626092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 235726092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 235826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 235926092bf5STheodore Ts'o "options when quota turned on"); 236026092bf5STheodore Ts'o return -1; 236126092bf5STheodore Ts'o } 236226092bf5STheodore Ts'o 236326092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 2364*461c3af0SLukas Czerner ext4_msg(sb, KERN_ERR, "%s option not supported", 2365*461c3af0SLukas Czerner param->key); 236626092bf5STheodore Ts'o } else if (token == Opt_commit) { 2367*461c3af0SLukas Czerner if (result.uint_32 == 0) 2368*461c3af0SLukas Czerner sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2369*461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 23709ba55543Szhangyi (F) ext4_msg(sb, KERN_ERR, 23719ba55543Szhangyi (F) "Invalid commit interval %d, " 23729ba55543Szhangyi (F) "must be smaller than %d", 2373*461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 23749ba55543Szhangyi (F) return -1; 23759ba55543Szhangyi (F) } 2376*461c3af0SLukas Czerner sbi->s_commit_interval = HZ * result.uint_32; 2377670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 2378*461c3af0SLukas Czerner if ((result.uint_32 & 1) || 2379*461c3af0SLukas Czerner (result.uint_32 < 4) || 2380*461c3af0SLukas Czerner (result.uint_32 > 2381*461c3af0SLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { 23829803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 2383*461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 23849803387cSTheodore Ts'o return -1; 23859803387cSTheodore Ts'o } 2386*461c3af0SLukas Czerner sbi->s_want_extra_isize = result.uint_32; 238726092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 2388*461c3af0SLukas Czerner sbi->s_max_batch_time = result.uint_32; 238926092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 2390*461c3af0SLukas Czerner sbi->s_min_batch_time = result.uint_32; 239126092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2392*461c3af0SLukas Czerner if (result.uint_32 && 2393*461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2394*461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2395e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 2396e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2397e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 239826092bf5STheodore Ts'o return -1; 239926092bf5STheodore Ts'o } 2400*461c3af0SLukas Czerner sbi->s_inode_readahead_blks = result.uint_32; 240126092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 240226092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 2403*461c3af0SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2404*461c3af0SLukas Czerner if (param->type == fs_value_is_string) 2405*461c3af0SLukas Czerner sbi->s_li_wait_mult = result.uint_32; 2406df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 2407*461c3af0SLukas Czerner sbi->s_max_dir_size_kb = result.uint_32; 24088016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 24098016e29fSHarshad Shirwadkar } else if (token == Opt_fc_debug_max_replay) { 2410*461c3af0SLukas Czerner sbi->s_fc_debug_max_replay = result.uint_32; 24118016e29fSHarshad Shirwadkar #endif 241226092bf5STheodore Ts'o } else if (token == Opt_stripe) { 2413*461c3af0SLukas Czerner sbi->s_stripe = result.uint_32; 24140efb3b23SJan Kara } else if (token == Opt_resuid) { 2415*461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 24160efb3b23SJan Kara if (!uid_valid(uid)) { 2417*461c3af0SLukas Czerner ext4_msg(sb, KERN_ERR, "Invalid uid value %d", 2418*461c3af0SLukas Czerner result.uint_32); 24190efb3b23SJan Kara return -1; 24200efb3b23SJan Kara } 24210efb3b23SJan Kara sbi->s_resuid = uid; 24220efb3b23SJan Kara } else if (token == Opt_resgid) { 2423*461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 24240efb3b23SJan Kara if (!gid_valid(gid)) { 2425*461c3af0SLukas Czerner ext4_msg(sb, KERN_ERR, "Invalid gid value %d", 2426*461c3af0SLukas Czerner result.uint_32); 24270efb3b23SJan Kara return -1; 24280efb3b23SJan Kara } 24290efb3b23SJan Kara sbi->s_resgid = gid; 24300efb3b23SJan Kara } else if (token == Opt_journal_dev) { 24310efb3b23SJan Kara if (is_remount) { 24320efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 24330efb3b23SJan Kara "Cannot specify journal on remount"); 24340efb3b23SJan Kara return -1; 24350efb3b23SJan Kara } 2436*461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 2437ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2438ad4eec61SEric Sandeen struct inode *journal_inode; 2439ad4eec61SEric Sandeen struct path path; 2440ad4eec61SEric Sandeen int error; 2441ad4eec61SEric Sandeen 2442ad4eec61SEric Sandeen if (is_remount) { 2443ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 2444ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2445ad4eec61SEric Sandeen return -1; 2446ad4eec61SEric Sandeen } 2447ad4eec61SEric Sandeen 2448*461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2449ad4eec61SEric Sandeen if (error) { 2450ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 2451*461c3af0SLukas Czerner "journal device path"); 2452ad4eec61SEric Sandeen return -1; 2453ad4eec61SEric Sandeen } 2454ad4eec61SEric Sandeen 24552b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2456*461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 2457ad4eec61SEric Sandeen path_put(&path); 24580efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 2459*461c3af0SLukas Czerner if (result.uint_32 > 7) { 24605f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 24610efb3b23SJan Kara " (must be 0-7)"); 24620efb3b23SJan Kara return -1; 24630efb3b23SJan Kara } 2464*461c3af0SLukas Czerner ctx->journal_ioprio = 2465*461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 24666ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 2467*461c3af0SLukas Czerner return ext4_set_test_dummy_encryption(sb, param, is_remount); 246826092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 246926092bf5STheodore Ts'o if (is_remount) { 247026092bf5STheodore Ts'o if (!sbi->s_journal) 247126092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 24725f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 247326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 247426092bf5STheodore Ts'o "Cannot change data mode on remount"); 247526092bf5STheodore Ts'o return -1; 247626092bf5STheodore Ts'o } 247726092bf5STheodore Ts'o } else { 247826092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 247926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 248026092bf5STheodore Ts'o } 248126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 248226092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 248326092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 248426092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 24855f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 24865f3633e3SJan Kara "quota options when quota turned on"); 248726092bf5STheodore Ts'o return -1; 248826092bf5STheodore Ts'o } 2489e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 2490c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 2491c325a67cSTheodore Ts'o "Quota format mount options ignored " 2492262b4662SJan Kara "when QUOTA feature is enabled"); 2493c325a67cSTheodore Ts'o return 1; 2494262b4662SJan Kara } 249526092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 249626092bf5STheodore Ts'o #endif 24979cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 24989cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2499ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 25009cb20f94SIra Weiny switch (token) { 25019cb20f94SIra Weiny case Opt_dax: 25029cb20f94SIra Weiny case Opt_dax_always: 2503829b37b8STheodore Ts'o if (is_remount && 2504829b37b8STheodore Ts'o (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2505829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 2506829b37b8STheodore Ts'o fail_dax_change_remount: 2507829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't change " 2508829b37b8STheodore Ts'o "dax mount option while remounting"); 2509829b37b8STheodore Ts'o return -1; 2510829b37b8STheodore Ts'o } 2511829b37b8STheodore Ts'o if (is_remount && 2512829b37b8STheodore Ts'o (test_opt(sb, DATA_FLAGS) == 2513829b37b8STheodore Ts'o EXT4_MOUNT_JOURNAL_DATA)) { 2514829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 2515829b37b8STheodore Ts'o "both data=journal and dax"); 2516829b37b8STheodore Ts'o return -1; 2517829b37b8STheodore Ts'o } 2518ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 2519ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 25209cb20f94SIra Weiny sbi->s_mount_opt |= EXT4_MOUNT_DAX_ALWAYS; 25219cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 25229cb20f94SIra Weiny break; 25239cb20f94SIra Weiny case Opt_dax_never: 2524829b37b8STheodore Ts'o if (is_remount && 2525829b37b8STheodore Ts'o (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2526829b37b8STheodore Ts'o (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) 2527829b37b8STheodore Ts'o goto fail_dax_change_remount; 25289cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 25299cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 25309cb20f94SIra Weiny break; 25319cb20f94SIra Weiny case Opt_dax_inode: 2532829b37b8STheodore Ts'o if (is_remount && 2533829b37b8STheodore Ts'o ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2534829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2535829b37b8STheodore Ts'o !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) 2536829b37b8STheodore Ts'o goto fail_dax_change_remount; 25379cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 25389cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 25399cb20f94SIra Weiny /* Strictly for printing options */ 25409cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_INODE; 25419cb20f94SIra Weiny break; 25429cb20f94SIra Weiny } 2543ef83b6e8SDan Williams #else 2544923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 25459cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 25469cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 2547923ae0ffSRoss Zwisler return -1; 2548923ae0ffSRoss Zwisler #endif 25497915a861SAles Novak } else if (token == Opt_data_err_abort) { 25507915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 25517915a861SAles Novak } else if (token == Opt_data_err_ignore) { 25527915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 2553196e402aSHarshad Shirwadkar } else if (token == Opt_mb_optimize_scan) { 2554*461c3af0SLukas Czerner if (result.int_32 != 0 && result.int_32 != 1) { 2555196e402aSHarshad Shirwadkar ext4_msg(sb, KERN_WARNING, 2556196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2557196e402aSHarshad Shirwadkar return -1; 2558196e402aSHarshad Shirwadkar } 2559*461c3af0SLukas Czerner ctx->mb_optimize_scan = result.int_32; 256026092bf5STheodore Ts'o } else { 2561*461c3af0SLukas Czerner unsigned int set = 0; 2562*461c3af0SLukas Czerner 2563*461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2564*461c3af0SLukas Czerner result.uint_32 > 0) 2565*461c3af0SLukas Czerner set = 1; 2566*461c3af0SLukas Czerner 256726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2568*461c3af0SLukas Czerner set = !set; 256926092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 257026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 2571*461c3af0SLukas Czerner "buggy handling of option %s", 2572*461c3af0SLukas Czerner param->key); 257326092bf5STheodore Ts'o WARN_ON(1); 257426092bf5STheodore Ts'o return -1; 257526092bf5STheodore Ts'o } 2576995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2577*461c3af0SLukas Czerner if (set != 0) 2578995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 |= m->mount_opt; 2579995a3ed6SHarshad Shirwadkar else 2580995a3ed6SHarshad Shirwadkar sbi->s_mount_opt2 &= ~m->mount_opt; 2581995a3ed6SHarshad Shirwadkar } else { 2582*461c3af0SLukas Czerner if (set != 0) 258326092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 258426092bf5STheodore Ts'o else 258526092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 258626092bf5STheodore Ts'o } 2587995a3ed6SHarshad Shirwadkar } 258826092bf5STheodore Ts'o return 1; 258926092bf5STheodore Ts'o } 259026092bf5STheodore Ts'o 2591ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 2592*461c3af0SLukas Czerner struct ext4_fs_context *ret_opts, 2593661aa520SEric Sandeen int is_remount) 2594ac27a0ecSDave Kleikamp { 2595*461c3af0SLukas Czerner struct fs_parameter param; 2596*461c3af0SLukas Czerner struct fs_context fc; 2597*461c3af0SLukas Czerner int ret; 2598*461c3af0SLukas Czerner char *key; 2599ac27a0ecSDave Kleikamp 2600ac27a0ecSDave Kleikamp if (!options) 2601ac27a0ecSDave Kleikamp return 1; 2602ac27a0ecSDave Kleikamp 2603*461c3af0SLukas Czerner memset(&fc, 0, sizeof(fc)); 2604*461c3af0SLukas Czerner fc.fs_private = ret_opts; 2605*461c3af0SLukas Czerner fc.s_fs_info = EXT4_SB(sb); 2606*461c3af0SLukas Czerner 2607*461c3af0SLukas Czerner if (is_remount) 2608*461c3af0SLukas Czerner fc.purpose = FS_CONTEXT_FOR_RECONFIGURE; 2609*461c3af0SLukas Czerner 2610*461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2611*461c3af0SLukas Czerner if (*key) { 2612*461c3af0SLukas Czerner size_t v_len = 0; 2613*461c3af0SLukas Czerner char *value = strchr(key, '='); 2614*461c3af0SLukas Czerner 2615*461c3af0SLukas Czerner param.type = fs_value_is_flag; 2616*461c3af0SLukas Czerner param.string = NULL; 2617*461c3af0SLukas Czerner 2618*461c3af0SLukas Czerner if (value) { 2619*461c3af0SLukas Czerner if (value == key) 2620ac27a0ecSDave Kleikamp continue; 2621*461c3af0SLukas Czerner 2622*461c3af0SLukas Czerner *value++ = 0; 2623*461c3af0SLukas Czerner v_len = strlen(value); 2624*461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2625*461c3af0SLukas Czerner GFP_KERNEL); 2626*461c3af0SLukas Czerner if (!param.string) 2627*461c3af0SLukas Czerner return 0; 2628*461c3af0SLukas Czerner param.type = fs_value_is_string; 2629*461c3af0SLukas Czerner } 2630*461c3af0SLukas Czerner 2631*461c3af0SLukas Czerner param.key = key; 2632*461c3af0SLukas Czerner param.size = v_len; 2633*461c3af0SLukas Czerner 2634*461c3af0SLukas Czerner ret = handle_mount_opt(&fc, ¶m); 2635*461c3af0SLukas Czerner if (param.string) 2636*461c3af0SLukas Czerner kfree(param.string); 2637*461c3af0SLukas Czerner if (ret < 0) 2638ac27a0ecSDave Kleikamp return 0; 2639ac27a0ecSDave Kleikamp } 2640*461c3af0SLukas Czerner } 2641*461c3af0SLukas Czerner 26424c94bff9SLukas Czerner return ext4_validate_options(sb); 26434c94bff9SLukas Czerner } 26444c94bff9SLukas Czerner 26454c94bff9SLukas Czerner static int ext4_validate_options(struct super_block *sb) 26464c94bff9SLukas Czerner { 26474c94bff9SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2648ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 26494c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 265049da9392SJan Kara /* 265149da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 265249da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 265349da9392SJan Kara * to support legacy quotas in quota files. 265449da9392SJan Kara */ 265549da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 265649da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 265749da9392SJan Kara "Cannot enable project quota enforcement."); 265849da9392SJan Kara return 0; 265949da9392SJan Kara } 266033458eabSTheodore Ts'o usr_qf_name = get_qf_name(sb, sbi, USRQUOTA); 266133458eabSTheodore Ts'o grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA); 266233458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 266333458eabSTheodore Ts'o if (test_opt(sb, USRQUOTA) && usr_qf_name) 2664fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 2665ac27a0ecSDave Kleikamp 266633458eabSTheodore Ts'o if (test_opt(sb, GRPQUOTA) && grp_qf_name) 2667fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2668ac27a0ecSDave Kleikamp 266956c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2670b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 2671b31e1552SEric Sandeen "format mixing"); 2672ac27a0ecSDave Kleikamp return 0; 2673ac27a0ecSDave Kleikamp } 2674ac27a0ecSDave Kleikamp 2675ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2676b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 2677b31e1552SEric Sandeen "not specified"); 2678ac27a0ecSDave Kleikamp return 0; 2679ac27a0ecSDave Kleikamp } 2680ac27a0ecSDave Kleikamp } 2681ac27a0ecSDave Kleikamp #endif 2682626b035bSRitesh Harjani if (test_opt(sb, DIOREAD_NOLOCK)) { 2683626b035bSRitesh Harjani int blocksize = 2684626b035bSRitesh Harjani BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2685626b035bSRitesh Harjani if (blocksize < PAGE_SIZE) 2686626b035bSRitesh Harjani ext4_msg(sb, KERN_WARNING, "Warning: mounting with an " 2687626b035bSRitesh Harjani "experimental mount option 'dioread_nolock' " 2688626b035bSRitesh Harjani "for blocksize < PAGE_SIZE"); 2689626b035bSRitesh Harjani } 2690ac27a0ecSDave Kleikamp return 1; 2691ac27a0ecSDave Kleikamp } 2692ac27a0ecSDave Kleikamp 26932adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 26942adf6da8STheodore Ts'o struct super_block *sb) 26952adf6da8STheodore Ts'o { 26962adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 26972adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 269833458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 26992adf6da8STheodore Ts'o 27002adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 27012adf6da8STheodore Ts'o char *fmtname = ""; 27022adf6da8STheodore Ts'o 27032adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 27042adf6da8STheodore Ts'o case QFMT_VFS_OLD: 27052adf6da8STheodore Ts'o fmtname = "vfsold"; 27062adf6da8STheodore Ts'o break; 27072adf6da8STheodore Ts'o case QFMT_VFS_V0: 27082adf6da8STheodore Ts'o fmtname = "vfsv0"; 27092adf6da8STheodore Ts'o break; 27102adf6da8STheodore Ts'o case QFMT_VFS_V1: 27112adf6da8STheodore Ts'o fmtname = "vfsv1"; 27122adf6da8STheodore Ts'o break; 27132adf6da8STheodore Ts'o } 27142adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 27152adf6da8STheodore Ts'o } 27162adf6da8STheodore Ts'o 271733458eabSTheodore Ts'o rcu_read_lock(); 271833458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 271933458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 272033458eabSTheodore Ts'o if (usr_qf_name) 272133458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 272233458eabSTheodore Ts'o if (grp_qf_name) 272333458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 272433458eabSTheodore Ts'o rcu_read_unlock(); 27252adf6da8STheodore Ts'o #endif 27262adf6da8STheodore Ts'o } 27272adf6da8STheodore Ts'o 27285a916be1STheodore Ts'o static const char *token2str(int token) 27295a916be1STheodore Ts'o { 273050df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 27315a916be1STheodore Ts'o 27325a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 27335a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 27345a916be1STheodore Ts'o break; 27355a916be1STheodore Ts'o return t->pattern; 27365a916be1STheodore Ts'o } 27375a916be1STheodore Ts'o 27382adf6da8STheodore Ts'o /* 27392adf6da8STheodore Ts'o * Show an option if 27402adf6da8STheodore Ts'o * - it's set to a non-default value OR 27412adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 27422adf6da8STheodore Ts'o */ 274366acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 274466acdcf4STheodore Ts'o int nodefs) 27452adf6da8STheodore Ts'o { 27462adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 27472adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 274868afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 27495a916be1STheodore Ts'o const struct mount_opts *m; 275066acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 27512adf6da8STheodore Ts'o 275266acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 275366acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 27542adf6da8STheodore Ts'o 27552adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 27565a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 27575a916be1STheodore Ts'o 27585a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 27595a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 27605a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 27619cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 27625a916be1STheodore Ts'o continue; 276368afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 27645a916be1STheodore Ts'o continue; /* skip if same as the default */ 27655a916be1STheodore Ts'o if ((want_set && 27665a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 27675a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 27685a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 27695a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 27705a916be1STheodore Ts'o } 27715a916be1STheodore Ts'o 277208cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 27735a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 277408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 277508cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 277608cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 27775a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 277808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 277908cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 278066acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 27815a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 27825a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 27832adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 27845a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 27852adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 27865a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 278766acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 27885a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 278966acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 27905a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 279166acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 27925a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2793357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 27945a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 279566acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 27965a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 279768afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 279868afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 27992adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 28005a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 28012adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 28025a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 28032adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 28045a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 28055a916be1STheodore Ts'o } 280666acdcf4STheodore Ts'o if (nodefs || 280766acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 28085a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 28092adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 28102adf6da8STheodore Ts'o 2811ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 281266acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 28135a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2814df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2815df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 28167915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 28177915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2818ed318a6cSEric Biggers 2819ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 28202adf6da8STheodore Ts'o 28214f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 28224f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 28234f74d15fSEric Biggers 28249cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 28259cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 28269cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 28279cb20f94SIra Weiny else 28289cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 28299cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 28309cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 28319cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 28329cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 28339cb20f94SIra Weiny } 28342adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 28352adf6da8STheodore Ts'o return 0; 28362adf6da8STheodore Ts'o } 28372adf6da8STheodore Ts'o 283866acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 283966acdcf4STheodore Ts'o { 284066acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 284166acdcf4STheodore Ts'o } 284266acdcf4STheodore Ts'o 2843ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 284466acdcf4STheodore Ts'o { 284566acdcf4STheodore Ts'o struct super_block *sb = seq->private; 284666acdcf4STheodore Ts'o int rc; 284766acdcf4STheodore Ts'o 2848bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 284966acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 285066acdcf4STheodore Ts'o seq_puts(seq, "\n"); 285166acdcf4STheodore Ts'o return rc; 285266acdcf4STheodore Ts'o } 285366acdcf4STheodore Ts'o 2854617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2855ac27a0ecSDave Kleikamp int read_only) 2856ac27a0ecSDave Kleikamp { 2857617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2858c89128a0SJaegeuk Kim int err = 0; 2859ac27a0ecSDave Kleikamp 2860617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2861b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2862b31e1552SEric Sandeen "forcing read-only mode"); 2863c89128a0SJaegeuk Kim err = -EROFS; 28645adaccacSyangerkun goto done; 2865ac27a0ecSDave Kleikamp } 2866ac27a0ecSDave Kleikamp if (read_only) 2867281b5995STheodore Ts'o goto done; 2868617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2869b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2870b31e1552SEric Sandeen "running e2fsck is recommended"); 2871c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2872b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2873b31e1552SEric Sandeen "warning: mounting fs with errors, " 2874b31e1552SEric Sandeen "running e2fsck is recommended"); 2875ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2876ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2877ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2878b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2879b31e1552SEric Sandeen "warning: maximal mount count reached, " 2880b31e1552SEric Sandeen "running e2fsck is recommended"); 2881ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 28826a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 28836a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2884b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2885b31e1552SEric Sandeen "warning: checktime reached, " 2886b31e1552SEric Sandeen "running e2fsck is recommended"); 28870390131bSFrank Mayhar if (!sbi->s_journal) 2888216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2889ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2890617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2891e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 28926a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 289302f310fcSJan Kara if (sbi->s_journal) { 2894e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 289502f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 289602f310fcSJan Kara ext4_set_feature_orphan_present(sb); 289702f310fcSJan Kara } 2898ac27a0ecSDave Kleikamp 28994392fbc4SJan Kara err = ext4_commit_super(sb); 2900281b5995STheodore Ts'o done: 2901ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2902a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2903a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2904ac27a0ecSDave Kleikamp sb->s_blocksize, 2905ac27a0ecSDave Kleikamp sbi->s_groups_count, 2906617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2907617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2908a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2909ac27a0ecSDave Kleikamp 29107abc52c2SDan Magenheimer cleancache_init_fs(sb); 2911c89128a0SJaegeuk Kim return err; 2912ac27a0ecSDave Kleikamp } 2913ac27a0ecSDave Kleikamp 2914117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2915117fff10STheodore Ts'o { 2916117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 29177c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 291837b0b6b8SDan Carpenter int size, i, j; 2919117fff10STheodore Ts'o 2920117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2921117fff10STheodore Ts'o return 0; 2922117fff10STheodore Ts'o 2923117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2924117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2925117fff10STheodore Ts'o return 0; 2926117fff10STheodore Ts'o 29277c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 29287c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 2929117fff10STheodore Ts'o if (!new_groups) { 29307c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 29317c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 2932117fff10STheodore Ts'o return -ENOMEM; 2933117fff10STheodore Ts'o } 29347c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 29357c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 29367c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 29377c990728SSuraj Jitindar Singh GFP_KERNEL); 29387c990728SSuraj Jitindar Singh if (!new_groups[i]) { 293937b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 294037b0b6b8SDan Carpenter kvfree(new_groups[j]); 29417c990728SSuraj Jitindar Singh kvfree(new_groups); 29427c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 29437c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 29447c990728SSuraj Jitindar Singh return -ENOMEM; 2945117fff10STheodore Ts'o } 29467c990728SSuraj Jitindar Singh } 29477c990728SSuraj Jitindar Singh rcu_read_lock(); 29487c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 29497c990728SSuraj Jitindar Singh if (old_groups) 29507c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 29517c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 29527c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 29537c990728SSuraj Jitindar Singh rcu_read_unlock(); 29547c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 29557c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 29567c990728SSuraj Jitindar Singh if (old_groups) 29577c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 2958117fff10STheodore Ts'o return 0; 2959117fff10STheodore Ts'o } 2960117fff10STheodore Ts'o 2961772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2962772cb7c8SJose R. Santos { 2963772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2964772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 29657c990728SSuraj Jitindar Singh struct flex_groups *fg; 2966772cb7c8SJose R. Santos ext4_group_t flex_group; 2967117fff10STheodore Ts'o int i, err; 2968772cb7c8SJose R. Santos 2969503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2970d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2971772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2972772cb7c8SJose R. Santos return 1; 2973772cb7c8SJose R. Santos } 2974772cb7c8SJose R. Santos 2975117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2976117fff10STheodore Ts'o if (err) 2977772cb7c8SJose R. Santos goto failed; 2978772cb7c8SJose R. Santos 2979772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 298088b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2981772cb7c8SJose R. Santos 2982772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 29837c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 29847c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 298590ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 29867c990728SSuraj Jitindar Singh &fg->free_clusters); 29877c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 2988772cb7c8SJose R. Santos } 2989772cb7c8SJose R. Santos 2990772cb7c8SJose R. Santos return 1; 2991772cb7c8SJose R. Santos failed: 2992772cb7c8SJose R. Santos return 0; 2993772cb7c8SJose R. Santos } 2994772cb7c8SJose R. Santos 2995e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2996717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2997717d50e4SAndreas Dilger { 2998b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2999717d50e4SAndreas Dilger __u16 crc = 0; 3000717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3001e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3002717d50e4SAndreas Dilger 30039aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3004feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3005feb0ab32SDarrick J. Wong __u32 csum32; 3006b47820edSDaeho Jeong __u16 dummy_csum = 0; 3007feb0ab32SDarrick J. Wong 3008feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3009feb0ab32SDarrick J. Wong sizeof(le_group)); 3010b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3011b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3012b47820edSDaeho Jeong sizeof(dummy_csum)); 3013b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3014b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3015b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3016b47820edSDaeho Jeong sbi->s_desc_size - offset); 3017feb0ab32SDarrick J. Wong 3018feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3019feb0ab32SDarrick J. Wong goto out; 3020feb0ab32SDarrick J. Wong } 3021feb0ab32SDarrick J. Wong 3022feb0ab32SDarrick J. Wong /* old crc16 code */ 3023e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3024813d32f9SDarrick J. Wong return 0; 3025813d32f9SDarrick J. Wong 3026717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3027717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3028717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3029717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3030717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3031e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3032717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3033717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3034717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3035717d50e4SAndreas Dilger offset); 3036717d50e4SAndreas Dilger 3037feb0ab32SDarrick J. Wong out: 3038717d50e4SAndreas Dilger return cpu_to_le16(crc); 3039717d50e4SAndreas Dilger } 3040717d50e4SAndreas Dilger 3041feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3042717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3043717d50e4SAndreas Dilger { 3044feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3045e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3046717d50e4SAndreas Dilger return 0; 3047717d50e4SAndreas Dilger 3048717d50e4SAndreas Dilger return 1; 3049717d50e4SAndreas Dilger } 3050717d50e4SAndreas Dilger 3051feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3052feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3053feb0ab32SDarrick J. Wong { 3054feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3055feb0ab32SDarrick J. Wong return; 3056e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3057feb0ab32SDarrick J. Wong } 3058feb0ab32SDarrick J. Wong 3059ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3060bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3061829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3062bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3063ac27a0ecSDave Kleikamp { 3064617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3065617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3066617ba13bSMingming Cao ext4_fsblk_t last_block; 306744de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3068bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3069bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3070bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3071ce421581SJose R. Santos int flexbg_flag = 0; 3072bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3073ac27a0ecSDave Kleikamp 3074e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3075ce421581SJose R. Santos flexbg_flag = 1; 3076ce421581SJose R. Santos 3077617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3078ac27a0ecSDave Kleikamp 3079197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3080197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3081197cd65aSAkinobu Mita 3082ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3083bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3084ac27a0ecSDave Kleikamp else 3085ac27a0ecSDave Kleikamp last_block = first_block + 3086617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3087ac27a0ecSDave Kleikamp 3088bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3089bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3090bfff6873SLukas Czerner grp = i; 3091bfff6873SLukas Czerner 30928fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3093829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3094829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3095829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3096829fa70dSTheodore Ts'o "superblock", i); 309718db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 309818db4b4eSTheodore Ts'o return 0; 3099829fa70dSTheodore Ts'o } 310077260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 310177260807STheodore Ts'o block_bitmap <= last_bg_block) { 310277260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 310377260807STheodore Ts'o "Block bitmap for group %u overlaps " 310477260807STheodore Ts'o "block group descriptors", i); 310577260807STheodore Ts'o if (!sb_rdonly(sb)) 310677260807STheodore Ts'o return 0; 310777260807STheodore Ts'o } 31082b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3109b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3110a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3111b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3112ac27a0ecSDave Kleikamp return 0; 3113ac27a0ecSDave Kleikamp } 31148fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3115829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3116829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3117829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3118829fa70dSTheodore Ts'o "superblock", i); 311918db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 312018db4b4eSTheodore Ts'o return 0; 3121829fa70dSTheodore Ts'o } 312277260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 312377260807STheodore Ts'o inode_bitmap <= last_bg_block) { 312477260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 312577260807STheodore Ts'o "Inode bitmap for group %u overlaps " 312677260807STheodore Ts'o "block group descriptors", i); 312777260807STheodore Ts'o if (!sb_rdonly(sb)) 312877260807STheodore Ts'o return 0; 312977260807STheodore Ts'o } 31302b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3131b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3132a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3133b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3134ac27a0ecSDave Kleikamp return 0; 3135ac27a0ecSDave Kleikamp } 31368fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3137829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3138829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3139829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3140829fa70dSTheodore Ts'o "superblock", i); 314118db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 314218db4b4eSTheodore Ts'o return 0; 3143829fa70dSTheodore Ts'o } 314477260807STheodore Ts'o if (inode_table >= sb_block + 1 && 314577260807STheodore Ts'o inode_table <= last_bg_block) { 314677260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 314777260807STheodore Ts'o "Inode table for group %u overlaps " 314877260807STheodore Ts'o "block group descriptors", i); 314977260807STheodore Ts'o if (!sb_rdonly(sb)) 315077260807STheodore Ts'o return 0; 315177260807STheodore Ts'o } 3152bd81d8eeSLaurent Vivier if (inode_table < first_block || 31532b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3154b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3155a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3156b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3157ac27a0ecSDave Kleikamp return 0; 3158ac27a0ecSDave Kleikamp } 3159955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3160feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3161b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3162b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3163e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3164fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3165bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3166955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3167717d50e4SAndreas Dilger return 0; 3168717d50e4SAndreas Dilger } 31697ee1ec4cSLi Zefan } 3170955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3171ce421581SJose R. Santos if (!flexbg_flag) 3172617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3173ac27a0ecSDave Kleikamp } 3174bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3175bfff6873SLukas Czerner *first_not_zeroed = grp; 3176ac27a0ecSDave Kleikamp return 1; 3177ac27a0ecSDave Kleikamp } 3178ac27a0ecSDave Kleikamp 3179cd2291a4SEric Sandeen /* 3180cd2291a4SEric Sandeen * Maximal extent format file size. 3181cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3182cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3183cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3184cd2291a4SEric Sandeen * so that won't be a limiting factor. 3185cd2291a4SEric Sandeen * 3186f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3187f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3188f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3189f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3190f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3191f17722f9SLukas Czerner * 3192cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3193cd2291a4SEric Sandeen */ 3194f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3195cd2291a4SEric Sandeen { 3196cd2291a4SEric Sandeen loff_t res; 3197cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3198cd2291a4SEric Sandeen 319972deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 320072deb455SChristoph Hellwig 320172deb455SChristoph Hellwig if (!has_huge_files) { 3202cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3203cd2291a4SEric Sandeen 3204cd2291a4SEric Sandeen /* total blocks in file system block size */ 3205cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3206cd2291a4SEric Sandeen upper_limit <<= blkbits; 3207cd2291a4SEric Sandeen } 3208cd2291a4SEric Sandeen 3209f17722f9SLukas Czerner /* 3210f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3211f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3212f17722f9SLukas Czerner * size 3213f17722f9SLukas Czerner */ 3214f17722f9SLukas Czerner res = (1LL << 32) - 1; 3215cd2291a4SEric Sandeen res <<= blkbits; 3216cd2291a4SEric Sandeen 3217cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3218cd2291a4SEric Sandeen if (res > upper_limit) 3219cd2291a4SEric Sandeen res = upper_limit; 3220cd2291a4SEric Sandeen 3221cd2291a4SEric Sandeen return res; 3222cd2291a4SEric Sandeen } 3223ac27a0ecSDave Kleikamp 3224ac27a0ecSDave Kleikamp /* 3225cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 32260fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 32270fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3228ac27a0ecSDave Kleikamp */ 3229f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3230ac27a0ecSDave Kleikamp { 323175ca6ad4SRitesh Harjani unsigned long long upper_limit, res = EXT4_NDIR_BLOCKS; 32320fc1b451SAneesh Kumar K.V int meta_blocks; 323375ca6ad4SRitesh Harjani 323475ca6ad4SRitesh Harjani /* 323575ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 32360b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 32370b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 32380b8e58a1SAndreas Dilger * 32390b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 32400b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 32410fc1b451SAneesh Kumar K.V */ 324272deb455SChristoph Hellwig if (!has_huge_files) { 32430fc1b451SAneesh Kumar K.V /* 324472deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 324572deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 324672deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 32470fc1b451SAneesh Kumar K.V */ 32480fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 32490fc1b451SAneesh Kumar K.V 32500fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 32510fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 32520fc1b451SAneesh Kumar K.V 32530fc1b451SAneesh Kumar K.V } else { 32548180a562SAneesh Kumar K.V /* 32558180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 32568180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 32578180a562SAneesh Kumar K.V * represent total number of blocks in 32588180a562SAneesh Kumar K.V * file system block size 32598180a562SAneesh Kumar K.V */ 32600fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 32610fc1b451SAneesh Kumar K.V 32620fc1b451SAneesh Kumar K.V } 32630fc1b451SAneesh Kumar K.V 32640fc1b451SAneesh Kumar K.V /* indirect blocks */ 32650fc1b451SAneesh Kumar K.V meta_blocks = 1; 32660fc1b451SAneesh Kumar K.V /* double indirect blocks */ 32670fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 32680fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 32690fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 32700fc1b451SAneesh Kumar K.V 32710fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 32720fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3273ac27a0ecSDave Kleikamp 3274ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3275ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3276ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3277ac27a0ecSDave Kleikamp res <<= bits; 3278ac27a0ecSDave Kleikamp if (res > upper_limit) 3279ac27a0ecSDave Kleikamp res = upper_limit; 32800fc1b451SAneesh Kumar K.V 32810fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 32820fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 32830fc1b451SAneesh Kumar K.V 328475ca6ad4SRitesh Harjani return (loff_t)res; 3285ac27a0ecSDave Kleikamp } 3286ac27a0ecSDave Kleikamp 3287617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 328870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3289ac27a0ecSDave Kleikamp { 3290617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3291fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3292ac27a0ecSDave Kleikamp int has_super = 0; 3293ac27a0ecSDave Kleikamp 3294ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3295ac27a0ecSDave Kleikamp 3296e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 329770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3298ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3299617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3300ac27a0ecSDave Kleikamp has_super = 1; 33010b8e58a1SAndreas Dilger 3302bd63f6b0SDarrick J. Wong /* 3303bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3304bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3305bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3306bd63f6b0SDarrick J. Wong * compensate. 3307bd63f6b0SDarrick J. Wong */ 3308bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 330949598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3310bd63f6b0SDarrick J. Wong has_super++; 3311bd63f6b0SDarrick J. Wong 3312617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3313ac27a0ecSDave Kleikamp } 3314ac27a0ecSDave Kleikamp 3315c9de560dSAlex Tomas /** 3316c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3317c9de560dSAlex Tomas * @sbi: In memory super block info 3318c9de560dSAlex Tomas * 3319c9de560dSAlex Tomas * If we have specified it via mount option, then 3320c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3321c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3322c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3323c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3324c9de560dSAlex Tomas * 3325c9de560dSAlex Tomas */ 3326c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3327c9de560dSAlex Tomas { 3328c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3329c9de560dSAlex Tomas unsigned long stripe_width = 3330c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 33313eb08658SDan Ehrenberg int ret; 3332c9de560dSAlex Tomas 3333c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 33343eb08658SDan Ehrenberg ret = sbi->s_stripe; 33355469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 33363eb08658SDan Ehrenberg ret = stripe_width; 33375469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 33383eb08658SDan Ehrenberg ret = stride; 33393eb08658SDan Ehrenberg else 33403eb08658SDan Ehrenberg ret = 0; 3341c9de560dSAlex Tomas 33423eb08658SDan Ehrenberg /* 33433eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 33443eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 33453eb08658SDan Ehrenberg */ 33463eb08658SDan Ehrenberg if (ret <= 1) 33473eb08658SDan Ehrenberg ret = 0; 3348c9de560dSAlex Tomas 33493eb08658SDan Ehrenberg return ret; 3350c9de560dSAlex Tomas } 3351ac27a0ecSDave Kleikamp 3352a13fb1a4SEric Sandeen /* 3353a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3354a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3355a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3356a13fb1a4SEric Sandeen * 0 if it cannot be. 3357a13fb1a4SEric Sandeen */ 335825c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3359a13fb1a4SEric Sandeen { 3360e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3361a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3362a13fb1a4SEric Sandeen "Couldn't mount because of " 3363a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3364a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3365a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3366a13fb1a4SEric Sandeen return 0; 3367a13fb1a4SEric Sandeen } 3368a13fb1a4SEric Sandeen 3369c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3370c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3371c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3372c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3373c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3374c83ad55eSGabriel Krisman Bertazi return 0; 3375c83ad55eSGabriel Krisman Bertazi } 3376c83ad55eSGabriel Krisman Bertazi #endif 3377c83ad55eSGabriel Krisman Bertazi 3378a13fb1a4SEric Sandeen if (readonly) 3379a13fb1a4SEric Sandeen return 1; 3380a13fb1a4SEric Sandeen 3381e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 33822cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 33831751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 33842cb5cc8bSDarrick J. Wong return 1; 33852cb5cc8bSDarrick J. Wong } 33862cb5cc8bSDarrick J. Wong 3387a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3388e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3389a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3390a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3391a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3392a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3393a13fb1a4SEric Sandeen return 0; 3394a13fb1a4SEric Sandeen } 3395e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3396bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3397bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3398bab08ab9STheodore Ts'o "extents feature\n"); 3399bab08ab9STheodore Ts'o return 0; 3400bab08ab9STheodore Ts'o } 34017c319d32SAditya Kali 34029db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3403d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3404d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 34057c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3406d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3407689c958cSLi Xi return 0; 3408689c958cSLi Xi } 34097c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3410a13fb1a4SEric Sandeen return 1; 3411a13fb1a4SEric Sandeen } 3412a13fb1a4SEric Sandeen 341366e61a9eSTheodore Ts'o /* 341466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 341566e61a9eSTheodore Ts'o * on the file system 341666e61a9eSTheodore Ts'o */ 3417235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 341866e61a9eSTheodore Ts'o { 3419235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3420235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3421235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 342266e61a9eSTheodore Ts'o 342366e61a9eSTheodore Ts'o if (es->s_error_count) 3424ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3425ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 342666e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 342766e61a9eSTheodore Ts'o if (es->s_first_error_time) { 34286a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 34296a0678a7SArnd Bergmann sb->s_id, 34306a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 343166e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 343266e61a9eSTheodore Ts'o es->s_first_error_func, 343366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 343466e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3435651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 343666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 343766e61a9eSTheodore Ts'o if (es->s_first_error_block) 3438651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 343966e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3440651e1c3bSJoe Perches printk(KERN_CONT "\n"); 344166e61a9eSTheodore Ts'o } 344266e61a9eSTheodore Ts'o if (es->s_last_error_time) { 34436a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 34446a0678a7SArnd Bergmann sb->s_id, 34456a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 344666e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 344766e61a9eSTheodore Ts'o es->s_last_error_func, 344866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 344966e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3450651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 345166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 345266e61a9eSTheodore Ts'o if (es->s_last_error_block) 3453651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 345466e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3455651e1c3bSJoe Perches printk(KERN_CONT "\n"); 345666e61a9eSTheodore Ts'o } 345766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 345866e61a9eSTheodore Ts'o } 345966e61a9eSTheodore Ts'o 3460bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3461bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3462bfff6873SLukas Czerner { 3463bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 34643d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 34653d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 34663d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 34673d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3468bfff6873SLukas Czerner int ret = 0; 346939fec688SShaoying Xu u64 start_time; 3470bfff6873SLukas Czerner 34713d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 34723d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 34733d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 34743d392b26STheodore Ts'o if (prefetch_ios) 34753d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 34763d392b26STheodore Ts'o prefetch_ios); 34773d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 34783d392b26STheodore Ts'o prefetch_ios); 34793d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 34803d392b26STheodore Ts'o ret = 1; 34813d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 34823d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 34833d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 34843d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 34853d392b26STheodore Ts'o ret = 0; 34863d392b26STheodore Ts'o } 34873d392b26STheodore Ts'o } 34883d392b26STheodore Ts'o return ret; 34893d392b26STheodore Ts'o } 3490bfff6873SLukas Czerner 34913d392b26STheodore Ts'o for (; group < ngroups; group++) { 3492bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3493bfff6873SLukas Czerner if (!gdp) { 3494bfff6873SLukas Czerner ret = 1; 3495bfff6873SLukas Czerner break; 3496bfff6873SLukas Czerner } 3497bfff6873SLukas Czerner 3498bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3499bfff6873SLukas Czerner break; 3500bfff6873SLukas Czerner } 3501bfff6873SLukas Czerner 35027f511862STheodore Ts'o if (group >= ngroups) 3503bfff6873SLukas Czerner ret = 1; 3504bfff6873SLukas Czerner 3505bfff6873SLukas Czerner if (!ret) { 350639fec688SShaoying Xu start_time = ktime_get_real_ns(); 3507bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3508bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 35093d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3510bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 351139fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 351239fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3513bfff6873SLukas Czerner } 3514bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3515bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3516bfff6873SLukas Czerner } 3517bfff6873SLukas Czerner return ret; 3518bfff6873SLukas Czerner } 3519bfff6873SLukas Czerner 3520bfff6873SLukas Czerner /* 3521bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 35224ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3523bfff6873SLukas Czerner */ 3524bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3525bfff6873SLukas Czerner { 3526bfff6873SLukas Czerner if (!elr) 3527bfff6873SLukas Czerner return; 3528bfff6873SLukas Czerner 3529bfff6873SLukas Czerner list_del(&elr->lr_request); 35303d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3531bfff6873SLukas Czerner kfree(elr); 3532bfff6873SLukas Czerner } 3533bfff6873SLukas Czerner 3534bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3535bfff6873SLukas Czerner { 35361bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 35371bb933fbSLukas Czerner if (!ext4_li_info) { 35381bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3539bfff6873SLukas Czerner return; 35401bb933fbSLukas Czerner } 3541bfff6873SLukas Czerner 3542bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 35431bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3544bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 35451bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3546bfff6873SLukas Czerner } 3547bfff6873SLukas Czerner 35488f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 35498f1f7453SEric Sandeen 3550bfff6873SLukas Czerner /* 3551bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3552bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3553bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3554bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3555bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3556bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3557bfff6873SLukas Czerner * next waking time and put itself into sleep. 3558bfff6873SLukas Czerner */ 3559bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3560bfff6873SLukas Czerner { 3561bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3562bfff6873SLukas Czerner struct list_head *pos, *n; 3563bfff6873SLukas Czerner struct ext4_li_request *elr; 35644ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3565bfff6873SLukas Czerner 3566bfff6873SLukas Czerner BUG_ON(NULL == eli); 3567bfff6873SLukas Czerner 3568bfff6873SLukas Czerner cont_thread: 3569bfff6873SLukas Czerner while (true) { 3570bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3571bfff6873SLukas Czerner 3572bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3573bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3574bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3575bfff6873SLukas Czerner goto exit_thread; 3576bfff6873SLukas Czerner } 3577bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3578e22834f0SDmitry Monakhov int err = 0; 3579e22834f0SDmitry Monakhov int progress = 0; 3580bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3581bfff6873SLukas Czerner lr_request); 3582bfff6873SLukas Czerner 3583e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3584e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3585e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3586e22834f0SDmitry Monakhov continue; 3587e22834f0SDmitry Monakhov } 3588e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3589e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3590e22834f0SDmitry Monakhov progress = 1; 3591e22834f0SDmitry Monakhov /* 3592e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3593e22834f0SDmitry Monakhov * be removed from the list, it is 3594e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3595e22834f0SDmitry Monakhov */ 3596e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3597e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3598e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3599e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3600e22834f0SDmitry Monakhov n = pos->next; 3601e22834f0SDmitry Monakhov } 3602e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3603e22834f0SDmitry Monakhov } 3604b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3605e22834f0SDmitry Monakhov if (err) { 3606bfff6873SLukas Czerner ext4_remove_li_request(elr); 3607bfff6873SLukas Czerner continue; 3608bfff6873SLukas Czerner } 3609e22834f0SDmitry Monakhov if (!progress) { 3610e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3611e22834f0SDmitry Monakhov (prandom_u32() 3612e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3613b2c78cd0STheodore Ts'o } 3614bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3615bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3616bfff6873SLukas Czerner } 3617bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3618bfff6873SLukas Czerner 3619a0acae0eSTejun Heo try_to_freeze(); 3620bfff6873SLukas Czerner 36214ed5c033SLukas Czerner cur = jiffies; 36224ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3623f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3624bfff6873SLukas Czerner cond_resched(); 3625bfff6873SLukas Czerner continue; 3626bfff6873SLukas Czerner } 3627bfff6873SLukas Czerner 36284ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 36294ed5c033SLukas Czerner 36308f1f7453SEric Sandeen if (kthread_should_stop()) { 36318f1f7453SEric Sandeen ext4_clear_request_list(); 36328f1f7453SEric Sandeen goto exit_thread; 36338f1f7453SEric Sandeen } 3634bfff6873SLukas Czerner } 3635bfff6873SLukas Czerner 3636bfff6873SLukas Czerner exit_thread: 3637bfff6873SLukas Czerner /* 3638bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3639bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3640bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3641bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3642bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3643bfff6873SLukas Czerner * new one. 3644bfff6873SLukas Czerner */ 3645bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3646bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3647bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3648bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3649bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3650bfff6873SLukas Czerner goto cont_thread; 3651bfff6873SLukas Czerner } 3652bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3653bfff6873SLukas Czerner kfree(ext4_li_info); 3654bfff6873SLukas Czerner ext4_li_info = NULL; 3655bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3656bfff6873SLukas Czerner 3657bfff6873SLukas Czerner return 0; 3658bfff6873SLukas Czerner } 3659bfff6873SLukas Czerner 3660bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3661bfff6873SLukas Czerner { 3662bfff6873SLukas Czerner struct list_head *pos, *n; 3663bfff6873SLukas Czerner struct ext4_li_request *elr; 3664bfff6873SLukas Czerner 3665bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3666bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3667bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3668bfff6873SLukas Czerner lr_request); 3669bfff6873SLukas Czerner ext4_remove_li_request(elr); 3670bfff6873SLukas Czerner } 3671bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3672bfff6873SLukas Czerner } 3673bfff6873SLukas Czerner 3674bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3675bfff6873SLukas Czerner { 36768f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 36778f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 36788f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 36798f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3680bfff6873SLukas Czerner ext4_clear_request_list(); 3681bfff6873SLukas Czerner kfree(ext4_li_info); 3682bfff6873SLukas Czerner ext4_li_info = NULL; 368392b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3684bfff6873SLukas Czerner "initialization thread\n", 3685bfff6873SLukas Czerner err); 3686bfff6873SLukas Czerner return err; 3687bfff6873SLukas Czerner } 3688bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3689bfff6873SLukas Czerner return 0; 3690bfff6873SLukas Czerner } 3691bfff6873SLukas Czerner 3692bfff6873SLukas Czerner /* 3693bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3694bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3695bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3696bfff6873SLukas Czerner * groups and return total number of groups. 3697bfff6873SLukas Czerner */ 3698bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3699bfff6873SLukas Czerner { 3700bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3701bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3702bfff6873SLukas Czerner 37038844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 37048844618dSTheodore Ts'o return ngroups; 37058844618dSTheodore Ts'o 3706bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3707bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3708bfff6873SLukas Czerner if (!gdp) 3709bfff6873SLukas Czerner continue; 3710bfff6873SLukas Czerner 371150122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3712bfff6873SLukas Czerner break; 3713bfff6873SLukas Czerner } 3714bfff6873SLukas Czerner 3715bfff6873SLukas Czerner return group; 3716bfff6873SLukas Czerner } 3717bfff6873SLukas Czerner 3718bfff6873SLukas Czerner static int ext4_li_info_new(void) 3719bfff6873SLukas Czerner { 3720bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3721bfff6873SLukas Czerner 3722bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3723bfff6873SLukas Czerner if (!eli) 3724bfff6873SLukas Czerner return -ENOMEM; 3725bfff6873SLukas Czerner 3726bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3727bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3728bfff6873SLukas Czerner 3729bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3730bfff6873SLukas Czerner 3731bfff6873SLukas Czerner ext4_li_info = eli; 3732bfff6873SLukas Czerner 3733bfff6873SLukas Czerner return 0; 3734bfff6873SLukas Czerner } 3735bfff6873SLukas Czerner 3736bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3737bfff6873SLukas Czerner ext4_group_t start) 3738bfff6873SLukas Czerner { 3739bfff6873SLukas Czerner struct ext4_li_request *elr; 3740bfff6873SLukas Czerner 3741bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3742bfff6873SLukas Czerner if (!elr) 3743bfff6873SLukas Czerner return NULL; 3744bfff6873SLukas Czerner 3745bfff6873SLukas Czerner elr->lr_super = sb; 37463d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 374721175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 37483d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3749bfff6873SLukas Czerner elr->lr_next_group = start; 375021175ca4SHarshad Shirwadkar } else { 375121175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 37523d392b26STheodore Ts'o } 3753bfff6873SLukas Czerner 3754bfff6873SLukas Czerner /* 3755bfff6873SLukas Czerner * Randomize first schedule time of the request to 3756bfff6873SLukas Czerner * spread the inode table initialization requests 3757bfff6873SLukas Czerner * better. 3758bfff6873SLukas Czerner */ 3759dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3760dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3761bfff6873SLukas Czerner return elr; 3762bfff6873SLukas Czerner } 3763bfff6873SLukas Czerner 37647f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3765bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3766bfff6873SLukas Czerner { 3767bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 37687f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 376949598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 37706c5a6cb9SAndrew Morton int ret = 0; 3771bfff6873SLukas Czerner 37727f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 377351ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 377451ce6511SLukas Czerner /* 377551ce6511SLukas Czerner * Reset timeout so it can be computed again, because 377651ce6511SLukas Czerner * s_li_wait_mult might have changed. 377751ce6511SLukas Czerner */ 377851ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 37797f511862STheodore Ts'o goto out; 378051ce6511SLukas Czerner } 3781bfff6873SLukas Czerner 378221175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 37833d392b26STheodore Ts'o (first_not_zeroed == ngroups || sb_rdonly(sb) || 37843d392b26STheodore Ts'o !test_opt(sb, INIT_INODE_TABLE))) 37857f511862STheodore Ts'o goto out; 3786bfff6873SLukas Czerner 3787bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 37887f511862STheodore Ts'o if (!elr) { 37897f511862STheodore Ts'o ret = -ENOMEM; 37907f511862STheodore Ts'o goto out; 37917f511862STheodore Ts'o } 3792bfff6873SLukas Czerner 3793bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3794bfff6873SLukas Czerner ret = ext4_li_info_new(); 3795bfff6873SLukas Czerner if (ret) 3796bfff6873SLukas Czerner goto out; 3797bfff6873SLukas Czerner } 3798bfff6873SLukas Czerner 3799bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3800bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3801bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3802bfff6873SLukas Czerner 3803bfff6873SLukas Czerner sbi->s_li_request = elr; 380446e4690bSTao Ma /* 380546e4690bSTao Ma * set elr to NULL here since it has been inserted to 380646e4690bSTao Ma * the request_list and the removal and free of it is 380746e4690bSTao Ma * handled by ext4_clear_request_list from now on. 380846e4690bSTao Ma */ 380946e4690bSTao Ma elr = NULL; 3810bfff6873SLukas Czerner 3811bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3812bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3813bfff6873SLukas Czerner if (ret) 3814bfff6873SLukas Czerner goto out; 3815bfff6873SLukas Czerner } 3816bfff6873SLukas Czerner out: 3817bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3818beed5ecbSNicolas Kaiser if (ret) 3819bfff6873SLukas Czerner kfree(elr); 3820bfff6873SLukas Czerner return ret; 3821bfff6873SLukas Czerner } 3822bfff6873SLukas Czerner 3823bfff6873SLukas Czerner /* 3824bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3825bfff6873SLukas Czerner * module unload. 3826bfff6873SLukas Czerner */ 3827bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3828bfff6873SLukas Czerner { 3829bfff6873SLukas Czerner /* 3830bfff6873SLukas Czerner * If thread exited earlier 3831bfff6873SLukas Czerner * there's nothing to be done. 3832bfff6873SLukas Czerner */ 38338f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3834bfff6873SLukas Czerner return; 3835bfff6873SLukas Czerner 38368f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3837bfff6873SLukas Czerner } 3838bfff6873SLukas Czerner 383925ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 384025ed6e8aSDarrick J. Wong { 384125ed6e8aSDarrick J. Wong int ret = 1; 384225ed6e8aSDarrick J. Wong int compat, incompat; 384325ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 384425ed6e8aSDarrick J. Wong 38459aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3846db9ee220SDarrick J. Wong /* journal checksum v3 */ 384725ed6e8aSDarrick J. Wong compat = 0; 3848db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 384925ed6e8aSDarrick J. Wong } else { 385025ed6e8aSDarrick J. Wong /* journal checksum v1 */ 385125ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 385225ed6e8aSDarrick J. Wong incompat = 0; 385325ed6e8aSDarrick J. Wong } 385425ed6e8aSDarrick J. Wong 3855feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3856feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3857feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3858feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 385925ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 386025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 386125ed6e8aSDarrick J. Wong compat, 0, 386225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 386325ed6e8aSDarrick J. Wong incompat); 386425ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 386525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 386625ed6e8aSDarrick J. Wong compat, 0, 386725ed6e8aSDarrick J. Wong incompat); 386825ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 386925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 387025ed6e8aSDarrick J. Wong } else { 3871feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3872feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 387325ed6e8aSDarrick J. Wong } 387425ed6e8aSDarrick J. Wong 387525ed6e8aSDarrick J. Wong return ret; 387625ed6e8aSDarrick J. Wong } 387725ed6e8aSDarrick J. Wong 3878952fc18eSTheodore Ts'o /* 3879952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3880952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3881952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3882952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3883952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3884952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3885952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3886952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3887952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3888952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3889952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3890952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3891952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3892952fc18eSTheodore Ts'o */ 3893952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3894952fc18eSTheodore Ts'o char *buf) 3895952fc18eSTheodore Ts'o { 3896952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3897952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3898952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3899952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3900952fc18eSTheodore Ts'o int s, j, count = 0; 3901952fc18eSTheodore Ts'o 3902e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 39030548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 39040548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 39050548bbb8STheodore Ts'o 3906952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3907952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3908952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3909952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3910952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3911952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3912952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3913952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3914952fc18eSTheodore Ts'o count++; 3915952fc18eSTheodore Ts'o } 3916952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3917952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3918952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3919952fc18eSTheodore Ts'o count++; 3920952fc18eSTheodore Ts'o } 3921952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3922952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3923952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3924952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3925952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3926952fc18eSTheodore Ts'o count++; 3927952fc18eSTheodore Ts'o } 3928952fc18eSTheodore Ts'o if (i != grp) 3929952fc18eSTheodore Ts'o continue; 3930952fc18eSTheodore Ts'o s = 0; 3931952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3932952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3933952fc18eSTheodore Ts'o count++; 3934952fc18eSTheodore Ts'o } 3935c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3936c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3937c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3938c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3939c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3940952fc18eSTheodore Ts'o } 3941c48ae41bSTheodore Ts'o count += j; 3942c48ae41bSTheodore Ts'o for (; j > 0; j--) 3943c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3944952fc18eSTheodore Ts'o } 3945952fc18eSTheodore Ts'o if (!count) 3946952fc18eSTheodore Ts'o return 0; 3947952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3948952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3949952fc18eSTheodore Ts'o } 3950952fc18eSTheodore Ts'o 3951952fc18eSTheodore Ts'o /* 3952952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3953952fc18eSTheodore Ts'o */ 3954952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3955952fc18eSTheodore Ts'o { 3956952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3957952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 39583c816dedSEric Whitney struct inode *j_inode; 39593c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3960952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3961952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 39624fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3963952fc18eSTheodore Ts'o 3964952fc18eSTheodore Ts'o if (!buf) 3965952fc18eSTheodore Ts'o return -ENOMEM; 3966952fc18eSTheodore Ts'o 3967952fc18eSTheodore Ts'o /* 3968952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3969952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3970952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3971952fc18eSTheodore Ts'o */ 3972952fc18eSTheodore Ts'o 3973952fc18eSTheodore Ts'o /* 3974952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3975952fc18eSTheodore Ts'o */ 3976952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3977952fc18eSTheodore Ts'o 3978952fc18eSTheodore Ts'o /* 3979952fc18eSTheodore Ts'o * Add the overhead found in each block group 3980952fc18eSTheodore Ts'o */ 3981952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3982952fc18eSTheodore Ts'o int blks; 3983952fc18eSTheodore Ts'o 3984952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3985952fc18eSTheodore Ts'o overhead += blks; 3986952fc18eSTheodore Ts'o if (blks) 3987952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3988952fc18eSTheodore Ts'o cond_resched(); 3989952fc18eSTheodore Ts'o } 39903c816dedSEric Whitney 39913c816dedSEric Whitney /* 39923c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 39933c816dedSEric Whitney * loaded or not 39943c816dedSEric Whitney */ 3995ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 3996ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 3997f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 3998f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 39993c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 40003c816dedSEric Whitney if (j_inode) { 40013c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 40023c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 40033c816dedSEric Whitney iput(j_inode); 40043c816dedSEric Whitney } else { 40053c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 40063c816dedSEric Whitney } 40073c816dedSEric Whitney } 4008952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4009952fc18eSTheodore Ts'o smp_wmb(); 4010952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4011952fc18eSTheodore Ts'o return 0; 4012952fc18eSTheodore Ts'o } 4013952fc18eSTheodore Ts'o 4014b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 401527dd4385SLukas Czerner { 401627dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4017b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 401827dd4385SLukas Czerner 401927dd4385SLukas Czerner /* 402030fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 402130fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 402230fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 402330fac0f7SJan Kara * to keep ext2/3 backward compatibility. 402430fac0f7SJan Kara */ 4025e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4026b5799018STheodore Ts'o return; 402730fac0f7SJan Kara /* 402827dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 402927dd4385SLukas Czerner * This should cover the situations where we can not afford to run 403027dd4385SLukas Czerner * out of space like for example punch hole, or converting 4031556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 403227dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 403327dd4385SLukas Czerner * very rare. 403427dd4385SLukas Czerner */ 4035b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4036b5799018STheodore Ts'o sbi->s_cluster_bits); 403727dd4385SLukas Czerner 403827dd4385SLukas Czerner do_div(resv_clusters, 50); 403927dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 404027dd4385SLukas Czerner 4041b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 404227dd4385SLukas Czerner } 404327dd4385SLukas Czerner 4044ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4045ca9b404fSRoman Anufriev { 4046ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4047ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4048ca9b404fSRoman Anufriev return "none"; 4049ca9b404fSRoman Anufriev 4050ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4051ca9b404fSRoman Anufriev return "journalled"; 4052ca9b404fSRoman Anufriev else 4053ca9b404fSRoman Anufriev return "writeback"; 4054ca9b404fSRoman Anufriev #else 4055ca9b404fSRoman Anufriev return "disabled"; 4056ca9b404fSRoman Anufriev #endif 4057ca9b404fSRoman Anufriev } 4058ca9b404fSRoman Anufriev 4059188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4060188c299eSJan Kara enum ext4_journal_trigger_type type, 4061188c299eSJan Kara void (*trigger)( 4062188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4063188c299eSJan Kara struct buffer_head *bh, 4064188c299eSJan Kara void *mapped_data, 4065188c299eSJan Kara size_t size)) 4066188c299eSJan Kara { 4067188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4068188c299eSJan Kara 4069188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4070188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4071188c299eSJan Kara } 4072188c299eSJan Kara 4073617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 4074ac27a0ecSDave Kleikamp { 40755e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 4076d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 40771d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4078617ba13bSMingming Cao struct ext4_super_block *es = NULL; 40795aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 40807c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4081617ba13bSMingming Cao ext4_fsblk_t block; 4082617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 408370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4084ac27a0ecSDave Kleikamp unsigned long offset = 0; 4085ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4086ac27a0ecSDave Kleikamp struct inode *root; 40870390131bSFrank Mayhar const char *descr; 4088dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4089281b5995STheodore Ts'o int blocksize, clustersize; 40904ec11028STheodore Ts'o unsigned int db_count; 40914ec11028STheodore Ts'o unsigned int i; 4092ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4093bd81d8eeSLaurent Vivier __u64 blocks_count; 409407aa2ea1SLukas Czerner int err = 0; 4095bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4096*461c3af0SLukas Czerner struct ext4_fs_context parsed_opts; 4097b237e304SHarshad Shirwadkar 4098b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4099b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4100b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 4101196e402aSHarshad Shirwadkar parsed_opts.mb_optimize_scan = DEFAULT_MB_OPTIMIZE_SCAN; 4102ac27a0ecSDave Kleikamp 41035aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 41045aee0f8aSTheodore Ts'o goto out_free_base; 4105705895b6SPekka Enberg 4106aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 4107705895b6SPekka Enberg sbi->s_blockgroup_lock = 4108705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 41095aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 41105aee0f8aSTheodore Ts'o goto out_free_base; 41115aee0f8aSTheodore Ts'o 4112ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 41132c0544b2STheodore Ts'o sbi->s_sb = sb; 4114240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4115d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 4116f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 41178446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4118ac27a0ecSDave Kleikamp 41199f6200bbSTheodore Ts'o /* Cleanup superblock name */ 4120ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 41219f6200bbSTheodore Ts'o 412207aa2ea1SLukas Czerner /* -EINVAL is default */ 4123dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4124617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4125ac27a0ecSDave Kleikamp if (!blocksize) { 4126b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4127ac27a0ecSDave Kleikamp goto out_fail; 4128ac27a0ecSDave Kleikamp } 4129ac27a0ecSDave Kleikamp 4130ac27a0ecSDave Kleikamp /* 4131617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4132ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4133ac27a0ecSDave Kleikamp */ 4134617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 413570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 413670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4137ac27a0ecSDave Kleikamp } else { 413870bbb3e0SAndrew Morton logical_sb_block = sb_block; 4139ac27a0ecSDave Kleikamp } 4140ac27a0ecSDave Kleikamp 41418394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 41428394a6abSzhangyi (F) if (IS_ERR(bh)) { 4143b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 41448394a6abSzhangyi (F) ret = PTR_ERR(bh); 4145ac27a0ecSDave Kleikamp goto out_fail; 4146ac27a0ecSDave Kleikamp } 4147ac27a0ecSDave Kleikamp /* 4148ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4149617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4150ac27a0ecSDave Kleikamp */ 41512716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4152ac27a0ecSDave Kleikamp sbi->s_es = es; 4153ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4154617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4155617ba13bSMingming Cao goto cantfind_ext4; 4156afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4157ac27a0ecSDave Kleikamp 4158feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4159e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4160e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4161363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4162feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4163feb0ab32SDarrick J. Wong 4164d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4165d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4166d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4167d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4168d25425f8SDarrick J. Wong silent = 1; 4169d25425f8SDarrick J. Wong goto cantfind_ext4; 4170d25425f8SDarrick J. Wong } 417102f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 417202f310fcSJan Kara ext4_orphan_file_block_trigger); 4173d25425f8SDarrick J. Wong 41740441984aSDarrick J. Wong /* Load the checksum driver */ 41750441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 41760441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 41770441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 41780441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 41790441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 41800441984aSDarrick J. Wong goto failed_mount; 41810441984aSDarrick J. Wong } 41820441984aSDarrick J. Wong 4183a9c47317SDarrick J. Wong /* Check superblock checksum */ 4184a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4185a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4186a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4187a9c47317SDarrick J. Wong silent = 1; 41886a797d27SDarrick J. Wong ret = -EFSBADCRC; 4189a9c47317SDarrick J. Wong goto cantfind_ext4; 4190a9c47317SDarrick J. Wong } 4191a9c47317SDarrick J. Wong 4192a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4193e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 41948c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4195dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4196a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4197a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4198a9c47317SDarrick J. Wong 4199ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4200ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4201fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4202617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4203fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 420487f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4205fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4206617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4207fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4208ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4209fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 421003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4211fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 42122e7842b8SHugh Dickins #endif 4213995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4214995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 421598c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 421698c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 421798c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 421898c1a759SDarrick J. Wong 4219617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4220fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4221617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4222fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4223617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4224fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4225ac27a0ecSDave Kleikamp 4226617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4227fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4228bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4229fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4230bb4f397aSAneesh Kumar K.V else 4231fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 423245f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4233fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 42348b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4235fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4236ac27a0ecSDave Kleikamp 423708cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 423808cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 423930773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 424030773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 424130773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4242ac27a0ecSDave Kleikamp 42438b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4244fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4245ac27a0ecSDave Kleikamp 42461e2462f9SMingming Cao /* 4247dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4248dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4249dd919b98SAneesh Kumar K.V */ 4250bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 42518b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4252fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4253dd919b98SAneesh Kumar K.V 425451ce6511SLukas Czerner /* 425551ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 425651ce6511SLukas Czerner * no mount option specified. 425751ce6511SLukas Czerner */ 425851ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 425951ce6511SLukas Czerner 4260c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4261c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4262c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4263c9200760STheodore Ts'o "Invalid log block size: %u", 4264c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4265c9200760STheodore Ts'o goto failed_mount; 4266c9200760STheodore Ts'o } 4267c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4268c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4269c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4270c9200760STheodore Ts'o "Invalid log cluster size: %u", 4271c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4272c9200760STheodore Ts'o goto failed_mount; 4273c9200760STheodore Ts'o } 4274c9200760STheodore Ts'o 4275c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4276626b035bSRitesh Harjani 4277626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4278626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4279626b035bSRitesh Harjani 42809803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 42819803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 42829803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 42839803387cSTheodore Ts'o } else { 42849803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 42859803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 42869803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 42879803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 42889803387cSTheodore Ts'o sbi->s_first_ino); 42899803387cSTheodore Ts'o goto failed_mount; 42909803387cSTheodore Ts'o } 42919803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 42929803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 42939803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 42949803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 42959803387cSTheodore Ts'o "unsupported inode size: %d", 42969803387cSTheodore Ts'o sbi->s_inode_size); 42974f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 42989803387cSTheodore Ts'o goto failed_mount; 42999803387cSTheodore Ts'o } 43009803387cSTheodore Ts'o /* 43019803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 43029803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 43039803387cSTheodore Ts'o * field should suffice to ensure we have extra space 43049803387cSTheodore Ts'o * for all three. 43059803387cSTheodore Ts'o */ 43069803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 43079803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 43089803387cSTheodore Ts'o sb->s_time_gran = 1; 43099803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 43109803387cSTheodore Ts'o } else { 43119803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 43129803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 43139803387cSTheodore Ts'o } 43149803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 43159803387cSTheodore Ts'o } 43169803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 43179803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 43189803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 43199803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 43209803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 43219803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 43229803387cSTheodore Ts'o 43239803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 43249803387cSTheodore Ts'o if (v > max) { 43259803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 43269803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 43279803387cSTheodore Ts'o goto failed_mount; 43289803387cSTheodore Ts'o } 43299803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 43309803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 43319803387cSTheodore Ts'o 43329803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 43339803387cSTheodore Ts'o if (v > max) { 43349803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 43359803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 43369803387cSTheodore Ts'o goto failed_mount; 43379803387cSTheodore Ts'o } 43389803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 43399803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 43409803387cSTheodore Ts'o } 43419803387cSTheodore Ts'o } 43429803387cSTheodore Ts'o 43435aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 43445aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 43455aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 43465aee0f8aSTheodore Ts'o GFP_KERNEL); 43475aee0f8aSTheodore Ts'o if (!s_mount_opts) 43485aee0f8aSTheodore Ts'o goto failed_mount; 4349b237e304SHarshad Shirwadkar if (!parse_options(s_mount_opts, sb, &parsed_opts, 0)) { 43508b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 43518b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 43525aee0f8aSTheodore Ts'o s_mount_opts); 43535aee0f8aSTheodore Ts'o } 43545aee0f8aSTheodore Ts'o kfree(s_mount_opts); 43558b67f04aSTheodore Ts'o } 43565a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 4357b237e304SHarshad Shirwadkar if (!parse_options((char *) data, sb, &parsed_opts, 0)) 4358ac27a0ecSDave Kleikamp goto failed_mount; 4359ac27a0ecSDave Kleikamp 4360c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4361f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4362c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4363c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4364c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4365c83ad55eSGabriel Krisman Bertazi 4366c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4367c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4368c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4369c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4370c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4371c83ad55eSGabriel Krisman Bertazi } 4372c83ad55eSGabriel Krisman Bertazi 4373c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4374c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4375c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4376c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4377c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4378c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4379c83ad55eSGabriel Krisman Bertazi encoding_flags); 4380c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4381c83ad55eSGabriel Krisman Bertazi } 4382c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4383c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4384c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4385c83ad55eSGabriel Krisman Bertazi 4386f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4387f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4388c83ad55eSGabriel Krisman Bertazi } 4389c83ad55eSGabriel Krisman Bertazi #endif 4390c83ad55eSGabriel Krisman Bertazi 439156889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4392556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4393781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4394244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4395556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 439656889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 439756889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 439856889787STheodore Ts'o "both data=journal and delalloc"); 439956889787STheodore Ts'o goto failed_mount; 440056889787STheodore Ts'o } 4401fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4402923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4403923ae0ffSRoss Zwisler "both data=journal and dax"); 4404923ae0ffSRoss Zwisler goto failed_mount; 4405923ae0ffSRoss Zwisler } 440673b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 440773b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 440873b92a2aSSergey Karamov "encrypted files will use data=ordered " 440973b92a2aSSergey Karamov "instead of data journaling mode"); 441073b92a2aSSergey Karamov } 441156889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 441256889787STheodore Ts'o clear_opt(sb, DELALLOC); 4413001e4a87STejun Heo } else { 4414001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 441556889787STheodore Ts'o } 441656889787STheodore Ts'o 44171751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 44181751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4419ac27a0ecSDave Kleikamp 4420617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4421e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4422e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4423e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4424b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4425b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4426b31e1552SEric Sandeen "running e2fsck is recommended"); 4427469108ffSTheodore Tso 4428ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4429ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4430e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4431ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4432ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4433ed3654ebSTheodore Ts'o goto failed_mount; 4434ed3654ebSTheodore Ts'o } 4435dec214d0STahsin Erdogan 4436dec214d0STahsin Erdogan /* 4437dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4438dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4439dec214d0STahsin Erdogan */ 4440dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4441dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4442dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4443dec214d0STahsin Erdogan goto failed_mount; 4444dec214d0STahsin Erdogan } 4445ed3654ebSTheodore Ts'o } 4446ed3654ebSTheodore Ts'o 44472035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 44482035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 44492035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 44502035e776STheodore Ts'o "using the ext4 subsystem"); 44512035e776STheodore Ts'o else { 44520d9366d6SEric Sandeen /* 44530d9366d6SEric Sandeen * If we're probing be silent, if this looks like 44540d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 44550d9366d6SEric Sandeen */ 44560d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 44570d9366d6SEric Sandeen goto failed_mount; 44582035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 44592035e776STheodore Ts'o "to feature incompatibilities"); 44602035e776STheodore Ts'o goto failed_mount; 44612035e776STheodore Ts'o } 44622035e776STheodore Ts'o } 44632035e776STheodore Ts'o 44642035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 44652035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 44662035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 44672035e776STheodore Ts'o "using the ext4 subsystem"); 44682035e776STheodore Ts'o else { 44690d9366d6SEric Sandeen /* 44700d9366d6SEric Sandeen * If we're probing be silent, if this looks like 44710d9366d6SEric Sandeen * it's actually an ext4 filesystem. 44720d9366d6SEric Sandeen */ 44730d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 44740d9366d6SEric Sandeen goto failed_mount; 44752035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 44762035e776STheodore Ts'o "to feature incompatibilities"); 44772035e776STheodore Ts'o goto failed_mount; 44782035e776STheodore Ts'o } 44792035e776STheodore Ts'o } 44802035e776STheodore Ts'o 4481469108ffSTheodore Tso /* 4482ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4483ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4484ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4485ac27a0ecSDave Kleikamp */ 4486bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4487ac27a0ecSDave Kleikamp goto failed_mount; 4488a13fb1a4SEric Sandeen 44895b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 44905b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 44915b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 44925b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 44935b9554dcSTheodore Ts'o goto failed_mount; 44945b9554dcSTheodore Ts'o } 44955b9554dcSTheodore Ts'o 4496bdd3c50dSChristoph Hellwig if (dax_supported(dax_dev, sb->s_bdev, blocksize, 0, 4497bdd3c50dSChristoph Hellwig bdev_nr_sectors(sb->s_bdev))) 4498a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4499a8ab6d38SIra Weiny 4500fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4501559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4502559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4503559db4c6SRoss Zwisler " that may contain inline data"); 4504361d24d4SEric Sandeen goto failed_mount; 4505559db4c6SRoss Zwisler } 4506a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 450724f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4508361d24d4SEric Sandeen "DAX unsupported by block device."); 4509361d24d4SEric Sandeen goto failed_mount; 451024f3478dSDan Williams } 4511923ae0ffSRoss Zwisler } 4512923ae0ffSRoss Zwisler 4513e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 45146ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 45156ddb2447STheodore Ts'o es->s_encryption_level); 45166ddb2447STheodore Ts'o goto failed_mount; 45176ddb2447STheodore Ts'o } 45186ddb2447STheodore Ts'o 4519ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4520afd09b61SAlexey Makhalov /* 4521afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4522afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4523afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4524afd09b61SAlexey Makhalov */ 4525afd09b61SAlexey Makhalov brelse(bh); 4526ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4527ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4528b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4529ce40733cSAneesh Kumar K.V blocksize); 4530afd09b61SAlexey Makhalov bh = NULL; 4531ac27a0ecSDave Kleikamp goto failed_mount; 4532ac27a0ecSDave Kleikamp } 4533ac27a0ecSDave Kleikamp 453470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 453570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 45368394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 45378394a6abSzhangyi (F) if (IS_ERR(bh)) { 4538b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4539b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 45408394a6abSzhangyi (F) ret = PTR_ERR(bh); 45418394a6abSzhangyi (F) bh = NULL; 4542ac27a0ecSDave Kleikamp goto failed_mount; 4543ac27a0ecSDave Kleikamp } 45442716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4545ac27a0ecSDave Kleikamp sbi->s_es = es; 4546617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4547b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4548b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4549ac27a0ecSDave Kleikamp goto failed_mount; 4550ac27a0ecSDave Kleikamp } 4551ac27a0ecSDave Kleikamp } 4552ac27a0ecSDave Kleikamp 4553e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4554f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4555f287a1a5STheodore Ts'o has_huge_files); 4556f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4557ac27a0ecSDave Kleikamp 45580d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4559e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 45608fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 45610d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4562d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4563b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4564b31e1552SEric Sandeen "unsupported descriptor size %lu", 45650d1ee42fSAlexandre Ratchov sbi->s_desc_size); 45660d1ee42fSAlexandre Ratchov goto failed_mount; 45670d1ee42fSAlexandre Ratchov } 45680d1ee42fSAlexandre Ratchov } else 45690d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 45700b8e58a1SAndreas Dilger 4571ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4572ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 45730b8e58a1SAndreas Dilger 4574617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4575ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4576617ba13bSMingming Cao goto cantfind_ext4; 4577cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4578cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4579cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4580b9c538daSJosh Triplett sbi->s_inodes_per_group); 4581cd6bb35bSTheodore Ts'o goto failed_mount; 4582cd6bb35bSTheodore Ts'o } 4583ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4584ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 45850d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4586ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4587ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4588e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4589e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 45900b8e58a1SAndreas Dilger 4591ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4592ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4593ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4594e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4595f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4596f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4597f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4598f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4599f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4600bc98a42cSDavid Howells if (!sb_rdonly(sb)) 460123301410STheodore Ts'o es->s_flags |= 460223301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4603f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4604f99b2589STheodore Ts'o #else 4605bc98a42cSDavid Howells if (!sb_rdonly(sb)) 460623301410STheodore Ts'o es->s_flags |= 460723301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4608f99b2589STheodore Ts'o #endif 4609f99b2589STheodore Ts'o } 461023301410STheodore Ts'o } 4611ac27a0ecSDave Kleikamp 4612281b5995STheodore Ts'o /* Handle clustersize */ 4613281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4614ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4615281b5995STheodore Ts'o if (clustersize < blocksize) { 4616281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4617281b5995STheodore Ts'o "cluster size (%d) smaller than " 4618281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4619281b5995STheodore Ts'o goto failed_mount; 4620281b5995STheodore Ts'o } 4621281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4622281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4623281b5995STheodore Ts'o sbi->s_clusters_per_group = 4624281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4625281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4626281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4627281b5995STheodore Ts'o "#clusters per group too big: %lu", 4628281b5995STheodore Ts'o sbi->s_clusters_per_group); 4629281b5995STheodore Ts'o goto failed_mount; 4630281b5995STheodore Ts'o } 4631281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4632281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4633281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4634281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4635281b5995STheodore Ts'o sbi->s_blocks_per_group, 4636281b5995STheodore Ts'o sbi->s_clusters_per_group); 4637281b5995STheodore Ts'o goto failed_mount; 4638281b5995STheodore Ts'o } 4639281b5995STheodore Ts'o } else { 4640281b5995STheodore Ts'o if (clustersize != blocksize) { 4641bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4642bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4643bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4644bfe0a5f4STheodore Ts'o goto failed_mount; 4645281b5995STheodore Ts'o } 4646ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4647b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4648b31e1552SEric Sandeen "#blocks per group too big: %lu", 4649ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4650ac27a0ecSDave Kleikamp goto failed_mount; 4651ac27a0ecSDave Kleikamp } 4652281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4653281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4654281b5995STheodore Ts'o } 4655281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4656281b5995STheodore Ts'o 4657960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4658960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4659960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4660960fd856STheodore Ts'o 4661bf43d84bSEric Sandeen /* 4662bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4663bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4664bf43d84bSEric Sandeen */ 46655a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 466630ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 46675a9ae68aSDarrick J. Wong if (err) { 4668b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4669bf43d84bSEric Sandeen " too large to mount safely on this system"); 4670ac27a0ecSDave Kleikamp goto failed_mount; 4671ac27a0ecSDave Kleikamp } 4672ac27a0ecSDave Kleikamp 4673617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4674617ba13bSMingming Cao goto cantfind_ext4; 4675e7c95593SEric Sandeen 46760f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 46775513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 46780f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4679b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4680b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 46810f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 46820f2ddca6SFrom: Thiemo Nagel goto failed_mount; 46830f2ddca6SFrom: Thiemo Nagel } 46840f2ddca6SFrom: Thiemo Nagel 46854ec11028STheodore Ts'o /* 46864ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 46874ec11028STheodore Ts'o * of the filesystem. 46884ec11028STheodore Ts'o */ 46894ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4690b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4691b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4692e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 46934ec11028STheodore Ts'o ext4_blocks_count(es)); 4694e7c95593SEric Sandeen goto failed_mount; 4695e7c95593SEric Sandeen } 4696bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4697bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4698bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4699bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4700bfe0a5f4STheodore Ts'o goto failed_mount; 4701bfe0a5f4STheodore Ts'o } 4702bfe0a5f4STheodore Ts'o 4703bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4704bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4705bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4706bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 47074ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4708df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 47094ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4710df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 47114ec11028STheodore Ts'o ext4_blocks_count(es), 47124ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 47134ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 47144ec11028STheodore Ts'o goto failed_mount; 47154ec11028STheodore Ts'o } 4716bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4717fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4718fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 47199e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 47209e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 47219e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 47229e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 47239e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 47249e463084STheodore Ts'o ret = -EINVAL; 47259e463084STheodore Ts'o goto failed_mount; 47269e463084STheodore Ts'o } 4727617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4728617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 47293a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 47302ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 47313a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 47323a4b77cdSEryu Guan "first meta block group too large: %u " 47333a4b77cdSEryu Guan "(group descriptor block count %u)", 47343a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 47353a4b77cdSEryu Guan goto failed_mount; 47363a4b77cdSEryu Guan } 47373a4b77cdSEryu Guan } 47381d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 47391d0c3924STheodore Ts'o kvmalloc_array(db_count, 4740f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 47411d0c3924STheodore Ts'o GFP_KERNEL)); 4742ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4743b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 47442cde417dSTheodore Ts'o ret = -ENOMEM; 4745ac27a0ecSDave Kleikamp goto failed_mount; 4746ac27a0ecSDave Kleikamp } 4747ac27a0ecSDave Kleikamp 4748705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4749ac27a0ecSDave Kleikamp 475085c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 475185c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 475285c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 47535df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 475485c8f176SAndrew Perepechko } 475585c8f176SAndrew Perepechko 4756ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 47571d0c3924STheodore Ts'o struct buffer_head *bh; 47581d0c3924STheodore Ts'o 475970bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 47608394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 47618394a6abSzhangyi (F) if (IS_ERR(bh)) { 4762b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4763b31e1552SEric Sandeen "can't read group descriptor %d", i); 4764ac27a0ecSDave Kleikamp db_count = i; 47658394a6abSzhangyi (F) ret = PTR_ERR(bh); 4766ac27a0ecSDave Kleikamp goto failed_mount2; 4767ac27a0ecSDave Kleikamp } 47681d0c3924STheodore Ts'o rcu_read_lock(); 47691d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 47701d0c3924STheodore Ts'o rcu_read_unlock(); 4771ac27a0ecSDave Kleikamp } 477244de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4773829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4774b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 47756a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4776f9ae9cf5STheodore Ts'o goto failed_mount2; 4777ac27a0ecSDave Kleikamp } 4778772cb7c8SJose R. Santos 4779235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 4780c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 4781c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 478204496411STao Ma 4783a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4784eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4785ce7e010aSTheodore Ts'o goto failed_mount3; 4786ce7e010aSTheodore Ts'o 4787c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 478867a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4789c9de560dSAlex Tomas 4790f9ae9cf5STheodore Ts'o /* 4791f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4792f9ae9cf5STheodore Ts'o */ 4793f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4794617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4795617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4796643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 4797a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4798ffcc4182SEric Biggers #endif 4799c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 4800c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 4801c93d8f88SEric Biggers #endif 4802ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4803617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4804e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 48051fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4806262b4662SJan Kara else 4807262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4808689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4809ac27a0ecSDave Kleikamp #endif 481085787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4811f2fa2ffcSAneesh Kumar K.V 4812ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 48133b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4814ac27a0ecSDave Kleikamp 4815aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 4816aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 4817aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_ineligible_updates, 0); 4818aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4819aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4820aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4821aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4822aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 48239b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 48249b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_COMMITTING); 4825aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 4826aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 48278016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 48288016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 48298016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 48308016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 48318016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 48328016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 48338016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4834aa75f4d3SHarshad Shirwadkar 4835ac27a0ecSDave Kleikamp sb->s_root = NULL; 4836ac27a0ecSDave Kleikamp 4837ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 483802f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 4839e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4840ac27a0ecSDave Kleikamp 4841bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4842c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 484350460fe8SDarrick J. Wong goto failed_mount3a; 4844c5e06d10SJohann Lombardi 4845ac27a0ecSDave Kleikamp /* 4846ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4847ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4848ac27a0ecSDave Kleikamp */ 4849e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 4850b237e304SHarshad Shirwadkar err = ext4_load_journal(sb, es, parsed_opts.journal_devnum); 48514753d8a2STheodore Ts'o if (err) 485250460fe8SDarrick J. Wong goto failed_mount3a; 4853bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4854e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4855b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4856b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4857744692dcSJiaying Zhang goto failed_mount_wq; 4858ac27a0ecSDave Kleikamp } else { 48591e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 48601e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 48611e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48621e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 48631e381f60SDmitry Monakhov goto failed_mount_wq; 48641e381f60SDmitry Monakhov } 48651e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 48661e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48671e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 48681e381f60SDmitry Monakhov goto failed_mount_wq; 48691e381f60SDmitry Monakhov } 48701e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 48711e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48721e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 48731e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 48741e381f60SDmitry Monakhov goto failed_mount_wq; 48751e381f60SDmitry Monakhov } 48761e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 48771e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 48781e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 48791e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 48801e381f60SDmitry Monakhov goto failed_mount_wq; 48811e381f60SDmitry Monakhov } 488250b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 48831e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4884fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 4885995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 48860390131bSFrank Mayhar sbi->s_journal = NULL; 48870390131bSFrank Mayhar needs_recovery = 0; 48880390131bSFrank Mayhar goto no_journal; 4889ac27a0ecSDave Kleikamp } 4890ac27a0ecSDave Kleikamp 4891e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4892eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4893eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4894b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4895744692dcSJiaying Zhang goto failed_mount_wq; 4896eb40a09cSJose R. Santos } 4897eb40a09cSJose R. Santos 489825ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 489925ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 490025ed6e8aSDarrick J. Wong "feature set"); 490125ed6e8aSDarrick J. Wong goto failed_mount_wq; 4902d4da6c9cSLinus Torvalds } 4903818d276cSGirish Shilamkar 4904a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 4905a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4906a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 4907a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 4908a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 4909a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 4910a1e5e465SHarshad Shirwadkar } 4911a1e5e465SHarshad Shirwadkar 4912ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4913ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4914ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4915ac27a0ecSDave Kleikamp case 0: 4916ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 491763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 491863f57933SAndrew Morton * cope, else JOURNAL_DATA 491963f57933SAndrew Morton */ 4920dab291afSMingming Cao if (jbd2_journal_check_available_features 492127f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4922fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 492327f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 492427f394a7STyson Nottingham } else { 4925fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 492627f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 492727f394a7STyson Nottingham } 4928ac27a0ecSDave Kleikamp break; 4929ac27a0ecSDave Kleikamp 4930617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4931617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4932dab291afSMingming Cao if (!jbd2_journal_check_available_features 4933dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4934b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4935b31e1552SEric Sandeen "requested data journaling mode"); 4936744692dcSJiaying Zhang goto failed_mount_wq; 4937ac27a0ecSDave Kleikamp } 49385a150bdeSGustavo A. R. Silva break; 4939ac27a0ecSDave Kleikamp default: 4940ac27a0ecSDave Kleikamp break; 4941ac27a0ecSDave Kleikamp } 4942ab04df78SJan Kara 4943ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4944ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4945ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4946ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4947ab04df78SJan Kara goto failed_mount_wq; 4948ab04df78SJan Kara } 4949ab04df78SJan Kara 4950b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 4951ac27a0ecSDave Kleikamp 4952342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 4953afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 4954342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 4955afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 495618aadd47SBobi Jam 4957ce7e010aSTheodore Ts'o no_journal: 4958cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 495947387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 496047387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4961cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4962cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 49639c191f70ST Makphaibulchoke goto failed_mount_wq; 49649c191f70ST Makphaibulchoke } 49659c191f70ST Makphaibulchoke 4966dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4967dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4968dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4969dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4970dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4971dec214d0STahsin Erdogan goto failed_mount_wq; 4972dec214d0STahsin Erdogan } 4973dec214d0STahsin Erdogan } 4974cdb7ee4cSTahsin Erdogan } 4975dec214d0STahsin Erdogan 4976c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 4977c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 4978c93d8f88SEric Biggers goto failed_mount_wq; 4979c93d8f88SEric Biggers } 4980c93d8f88SEric Biggers 4981bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4982e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4983e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 49844392fbc4SJan Kara ext4_commit_super(sb); 49856ddb2447STheodore Ts'o } 49866ddb2447STheodore Ts'o 4987fd89d5f2STejun Heo /* 4988952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4989952fc18eSTheodore Ts'o * superblock if present. 4990952fc18eSTheodore Ts'o */ 4991952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4992952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4993952fc18eSTheodore Ts'o else { 499407aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 499507aa2ea1SLukas Czerner if (err) 4996952fc18eSTheodore Ts'o goto failed_mount_wq; 4997952fc18eSTheodore Ts'o } 4998952fc18eSTheodore Ts'o 4999952fc18eSTheodore Ts'o /* 5000fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5001fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5002fd89d5f2STejun Heo */ 50032e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 50042e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 50052e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 50062e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 500707aa2ea1SLukas Czerner ret = -ENOMEM; 50082e8fa54eSJan Kara goto failed_mount4; 50092e8fa54eSJan Kara } 50102e8fa54eSJan Kara 5011ac27a0ecSDave Kleikamp /* 5012dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5013ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5014ac27a0ecSDave Kleikamp */ 5015ac27a0ecSDave Kleikamp 50168a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 50171d1fe1eeSDavid Howells if (IS_ERR(root)) { 5018b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 50191d1fe1eeSDavid Howells ret = PTR_ERR(root); 502032a9bb57SManish Katiyar root = NULL; 5021ac27a0ecSDave Kleikamp goto failed_mount4; 5022ac27a0ecSDave Kleikamp } 5023ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5024b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 502594bf608aSAl Viro iput(root); 5026ac27a0ecSDave Kleikamp goto failed_mount4; 5027ac27a0ecSDave Kleikamp } 5028b886ee3eSGabriel Krisman Bertazi 502948fde701SAl Viro sb->s_root = d_make_root(root); 50301d1fe1eeSDavid Howells if (!sb->s_root) { 5031b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 50321d1fe1eeSDavid Howells ret = -ENOMEM; 50331d1fe1eeSDavid Howells goto failed_mount4; 50341d1fe1eeSDavid Howells } 5035ac27a0ecSDave Kleikamp 5036c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5037c89128a0SJaegeuk Kim if (ret == -EROFS) { 50381751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5039c89128a0SJaegeuk Kim ret = 0; 5040c89128a0SJaegeuk Kim } else if (ret) 5041c89128a0SJaegeuk Kim goto failed_mount4a; 5042ef7f3835SKalpak Shah 5043b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 504427dd4385SLukas Czerner 50450f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 50466fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 50476fd058f7STheodore Ts'o if (err) { 5048b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5049fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5050f9ae9cf5STheodore Ts'o goto failed_mount4a; 5051f9ae9cf5STheodore Ts'o } 50520f5bde1dSJan Kara } 50538016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5054f9ae9cf5STheodore Ts'o 5055f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5056196e402aSHarshad Shirwadkar 5057196e402aSHarshad Shirwadkar /* 5058196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5059196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5060196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5061196e402aSHarshad Shirwadkar */ 5062196e402aSHarshad Shirwadkar if (parsed_opts.mb_optimize_scan == 1) 5063196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5064196e402aSHarshad Shirwadkar else if (parsed_opts.mb_optimize_scan == 0) 5065196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 5066196e402aSHarshad Shirwadkar else if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5067196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 5068196e402aSHarshad Shirwadkar 5069f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5070f9ae9cf5STheodore Ts'o if (err) { 5071f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5072f9ae9cf5STheodore Ts'o err); 5073dcf2d804STao Ma goto failed_mount5; 5074c2774d84SAneesh Kumar K.V } 5075c2774d84SAneesh Kumar K.V 5076027f14f5STheodore Ts'o /* 5077027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5078027f14f5STheodore Ts'o * mballoc is initialized 5079027f14f5STheodore Ts'o */ 5080027f14f5STheodore Ts'o if (sbi->s_journal) 5081027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5082027f14f5STheodore Ts'o ext4_journal_commit_callback; 5083027f14f5STheodore Ts'o 5084d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5085d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5086d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5087908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5088908c7f19STejun Heo GFP_KERNEL); 5089d5e03cbbSTheodore Ts'o if (!err) { 5090d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5091d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5092908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5093908c7f19STejun Heo GFP_KERNEL); 5094d5e03cbbSTheodore Ts'o } 5095b2bbb92fSJan Kara /* 5096b2bbb92fSJan Kara * Update the checksum after updating free space/inode 5097b2bbb92fSJan Kara * counters. Otherwise the superblock can have an incorrect 5098b2bbb92fSJan Kara * checksum in the buffer cache until it is written out and 5099b2bbb92fSJan Kara * e2fsprogs programs trying to open a file system immediately 5100b2bbb92fSJan Kara * after it is mounted can fail. 5101b2bbb92fSJan Kara */ 5102b2bbb92fSJan Kara ext4_superblock_csum_set(sb); 5103d5e03cbbSTheodore Ts'o if (!err) 5104d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5105908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5106d5e03cbbSTheodore Ts'o if (!err) 5107908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5108908c7f19STejun Heo GFP_KERNEL); 5109c8585c6fSDaeho Jeong if (!err) 5110efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5111efc61345SEric Whitney GFP_KERNEL); 5112efc61345SEric Whitney if (!err) 5113bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5114c8585c6fSDaeho Jeong 5115d5e03cbbSTheodore Ts'o if (err) { 5116d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5117d5e03cbbSTheodore Ts'o goto failed_mount6; 5118d5e03cbbSTheodore Ts'o } 5119d5e03cbbSTheodore Ts'o 5120e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5121d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5122d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5123d5e03cbbSTheodore Ts'o "unable to initialize " 5124d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 51258f6840c4SYang Yingliang ret = -ENOMEM; 5126d5e03cbbSTheodore Ts'o goto failed_mount6; 5127d5e03cbbSTheodore Ts'o } 5128d5e03cbbSTheodore Ts'o 5129bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5130bfff6873SLukas Czerner if (err) 5131dcf2d804STao Ma goto failed_mount6; 5132bfff6873SLukas Czerner 5133b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5134dcf2d804STao Ma if (err) 5135dcf2d804STao Ma goto failed_mount7; 51363197ebdbSTheodore Ts'o 513702f310fcSJan Kara err = ext4_init_orphan_info(sb); 513802f310fcSJan Kara if (err) 513902f310fcSJan Kara goto failed_mount8; 51409b2ff357SJan Kara #ifdef CONFIG_QUOTA 51419b2ff357SJan Kara /* Enable quota usage during mount. */ 5142bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 51439b2ff357SJan Kara err = ext4_enable_quotas(sb); 51449b2ff357SJan Kara if (err) 514502f310fcSJan Kara goto failed_mount9; 51469b2ff357SJan Kara } 51479b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 51489b2ff357SJan Kara 5149bc71726cSzhangyi (F) /* 5150bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5151bc71726cSzhangyi (F) * used to detect the metadata async write error. 5152bc71726cSzhangyi (F) */ 5153bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5154bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5155bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5156bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5157617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5158617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5159617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 51600390131bSFrank Mayhar if (needs_recovery) { 5161b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 516211215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 516311215630SJan Kara if (err) 516402f310fcSJan Kara goto failed_mount9; 51650390131bSFrank Mayhar } 51660390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 51670390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 51680390131bSFrank Mayhar descr = " journalled data mode"; 51690390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 51700390131bSFrank Mayhar descr = " ordered data mode"; 51710390131bSFrank Mayhar else 51720390131bSFrank Mayhar descr = " writeback data mode"; 51730390131bSFrank Mayhar } else 51740390131bSFrank Mayhar descr = "out journal"; 51750390131bSFrank Mayhar 517679add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 517779add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 517879add3a3SLukas Czerner if (!blk_queue_discard(q)) 517979add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 518079add3a3SLukas Czerner "mounting with \"discard\" option, but " 518179add3a3SLukas Czerner "the device does not support discard"); 518279add3a3SLukas Czerner } 518379add3a3SLukas Czerner 5184e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 5185d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5186ca9b404fSRoman Anufriev "Opts: %.*s%s%s. Quota mode: %s.", descr, 51875aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 51885aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 5189ca9b404fSRoman Anufriev *sbi->s_es->s_mount_opts ? "; " : "", orig_data, 5190ca9b404fSRoman Anufriev ext4_quota_mode(sb)); 5191ac27a0ecSDave Kleikamp 519266e61a9eSTheodore Ts'o if (es->s_error_count) 519366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5194ac27a0ecSDave Kleikamp 5195efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5196efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5197efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5198efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 51991cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 52001cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5201efbed4dcSTheodore Ts'o 5202d4c402d9SCurt Wohlgemuth kfree(orig_data); 5203ac27a0ecSDave Kleikamp return 0; 5204ac27a0ecSDave Kleikamp 5205617ba13bSMingming Cao cantfind_ext4: 5206ac27a0ecSDave Kleikamp if (!silent) 5207b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5208ac27a0ecSDave Kleikamp goto failed_mount; 5209ac27a0ecSDave Kleikamp 521002f310fcSJan Kara failed_mount9: 521102f310fcSJan Kara ext4_release_orphan_info(sb); 521272ba7450STheodore Ts'o failed_mount8: 5213ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5214cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5215dcf2d804STao Ma failed_mount7: 5216dcf2d804STao Ma ext4_unregister_li_request(sb); 5217dcf2d804STao Ma failed_mount6: 5218f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 52197c990728SSuraj Jitindar Singh rcu_read_lock(); 52207c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 52217c990728SSuraj Jitindar Singh if (flex_groups) { 52227c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 52237c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 52247c990728SSuraj Jitindar Singh kvfree(flex_groups); 52257c990728SSuraj Jitindar Singh } 52267c990728SSuraj Jitindar Singh rcu_read_unlock(); 5227d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5228d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5229d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5230d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5231efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5232bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 523300764937SAzat Khuzhin failed_mount5: 5234f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5235f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5236f9ae9cf5STheodore Ts'o failed_mount4a: 523794bf608aSAl Viro dput(sb->s_root); 523832a9bb57SManish Katiyar sb->s_root = NULL; 523994bf608aSAl Viro failed_mount4: 5240b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 52412e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 52422e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 52434c0425ffSMingming Cao failed_mount_wq: 5244dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5245dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 524650c15df6SChengguang Xu 524747387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 524847387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 524950c15df6SChengguang Xu 52500390131bSFrank Mayhar if (sbi->s_journal) { 5251bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5252bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5253dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 525447b4a50bSJan Kara sbi->s_journal = NULL; 52550390131bSFrank Mayhar } 525650460fe8SDarrick J. Wong failed_mount3a: 5257d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5258eb68d0e2SZheng Liu failed_mount3: 5259bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5260c92dc856SJan Kara flush_work(&sbi->s_error_work); 52612a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5262618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5263ac27a0ecSDave Kleikamp failed_mount2: 52641d0c3924STheodore Ts'o rcu_read_lock(); 52651d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5266ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 52671d0c3924STheodore Ts'o brelse(group_desc[i]); 52681d0c3924STheodore Ts'o kvfree(group_desc); 52691d0c3924STheodore Ts'o rcu_read_unlock(); 5270ac27a0ecSDave Kleikamp failed_mount: 52710441984aSDarrick J. Wong if (sbi->s_chksum_driver) 52720441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5273c83ad55eSGabriel Krisman Bertazi 5274c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 5275f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5276c83ad55eSGabriel Krisman Bertazi #endif 5277c83ad55eSGabriel Krisman Bertazi 5278ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5279a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 52800ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5281ac27a0ecSDave Kleikamp #endif 5282ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5283afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5284ac27a0ecSDave Kleikamp brelse(bh); 5285afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5286ac27a0ecSDave Kleikamp out_fail: 5287ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5288f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 52895aee0f8aSTheodore Ts'o out_free_base: 5290ac27a0ecSDave Kleikamp kfree(sbi); 5291d4c402d9SCurt Wohlgemuth kfree(orig_data); 52925e405595SDan Williams fs_put_dax(dax_dev); 529307aa2ea1SLukas Czerner return err ? err : ret; 5294ac27a0ecSDave Kleikamp } 5295ac27a0ecSDave Kleikamp 5296ac27a0ecSDave Kleikamp /* 5297ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5298ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5299ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5300ac27a0ecSDave Kleikamp */ 5301617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5302ac27a0ecSDave Kleikamp { 5303617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5304ac27a0ecSDave Kleikamp 5305ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 530630773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 530730773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 53086866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5309ac27a0ecSDave Kleikamp 5310a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5311ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5312dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5313ac27a0ecSDave Kleikamp else 5314dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 53155bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 53165bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 53175bf5683aSHidehiro Kawai else 53185bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5319a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5320ac27a0ecSDave Kleikamp } 5321ac27a0ecSDave Kleikamp 5322c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5323ac27a0ecSDave Kleikamp unsigned int journal_inum) 5324ac27a0ecSDave Kleikamp { 5325ac27a0ecSDave Kleikamp struct inode *journal_inode; 5326ac27a0ecSDave Kleikamp 5327c6cb7e77SEric Whitney /* 5328c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5329c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5330c6cb7e77SEric Whitney * will try to delete it. 5331c6cb7e77SEric Whitney */ 53328a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 53331d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5334b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5335ac27a0ecSDave Kleikamp return NULL; 5336ac27a0ecSDave Kleikamp } 5337ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5338ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5339ac27a0ecSDave Kleikamp iput(journal_inode); 5340b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5341ac27a0ecSDave Kleikamp return NULL; 5342ac27a0ecSDave Kleikamp } 5343ac27a0ecSDave Kleikamp 5344e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 5345ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 53461d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5347b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5348ac27a0ecSDave Kleikamp iput(journal_inode); 5349ac27a0ecSDave Kleikamp return NULL; 5350ac27a0ecSDave Kleikamp } 5351c6cb7e77SEric Whitney return journal_inode; 5352c6cb7e77SEric Whitney } 5353c6cb7e77SEric Whitney 5354c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5355c6cb7e77SEric Whitney unsigned int journal_inum) 5356c6cb7e77SEric Whitney { 5357c6cb7e77SEric Whitney struct inode *journal_inode; 5358c6cb7e77SEric Whitney journal_t *journal; 5359c6cb7e77SEric Whitney 536011215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 536111215630SJan Kara return NULL; 5362c6cb7e77SEric Whitney 5363c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5364c6cb7e77SEric Whitney if (!journal_inode) 5365c6cb7e77SEric Whitney return NULL; 5366ac27a0ecSDave Kleikamp 5367dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5368ac27a0ecSDave Kleikamp if (!journal) { 5369b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5370ac27a0ecSDave Kleikamp iput(journal_inode); 5371ac27a0ecSDave Kleikamp return NULL; 5372ac27a0ecSDave Kleikamp } 5373ac27a0ecSDave Kleikamp journal->j_private = sb; 5374617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5375ac27a0ecSDave Kleikamp return journal; 5376ac27a0ecSDave Kleikamp } 5377ac27a0ecSDave Kleikamp 5378617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5379ac27a0ecSDave Kleikamp dev_t j_dev) 5380ac27a0ecSDave Kleikamp { 5381ac27a0ecSDave Kleikamp struct buffer_head *bh; 5382ac27a0ecSDave Kleikamp journal_t *journal; 5383617ba13bSMingming Cao ext4_fsblk_t start; 5384617ba13bSMingming Cao ext4_fsblk_t len; 5385ac27a0ecSDave Kleikamp int hblock, blocksize; 5386617ba13bSMingming Cao ext4_fsblk_t sb_block; 5387ac27a0ecSDave Kleikamp unsigned long offset; 5388617ba13bSMingming Cao struct ext4_super_block *es; 5389ac27a0ecSDave Kleikamp struct block_device *bdev; 5390ac27a0ecSDave Kleikamp 539111215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 539211215630SJan Kara return NULL; 53930390131bSFrank Mayhar 5394b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5395ac27a0ecSDave Kleikamp if (bdev == NULL) 5396ac27a0ecSDave Kleikamp return NULL; 5397ac27a0ecSDave Kleikamp 5398ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5399e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5400ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5401b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5402b31e1552SEric Sandeen "blocksize too small for journal device"); 5403ac27a0ecSDave Kleikamp goto out_bdev; 5404ac27a0ecSDave Kleikamp } 5405ac27a0ecSDave Kleikamp 5406617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5407617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5408ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5409ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5410b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5411b31e1552SEric Sandeen "external journal"); 5412ac27a0ecSDave Kleikamp goto out_bdev; 5413ac27a0ecSDave Kleikamp } 5414ac27a0ecSDave Kleikamp 54152716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5416617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5417ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5418617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5419b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5420b31e1552SEric Sandeen "bad superblock"); 5421ac27a0ecSDave Kleikamp brelse(bh); 5422ac27a0ecSDave Kleikamp goto out_bdev; 5423ac27a0ecSDave Kleikamp } 5424ac27a0ecSDave Kleikamp 5425df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5426df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5427df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5428df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5429df4763beSDarrick J. Wong "corrupt superblock"); 5430df4763beSDarrick J. Wong brelse(bh); 5431df4763beSDarrick J. Wong goto out_bdev; 5432df4763beSDarrick J. Wong } 5433df4763beSDarrick J. Wong 5434617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5435b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5436ac27a0ecSDave Kleikamp brelse(bh); 5437ac27a0ecSDave Kleikamp goto out_bdev; 5438ac27a0ecSDave Kleikamp } 5439ac27a0ecSDave Kleikamp 5440bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5441ac27a0ecSDave Kleikamp start = sb_block + 1; 5442ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5443ac27a0ecSDave Kleikamp 5444dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5445ac27a0ecSDave Kleikamp start, len, blocksize); 5446ac27a0ecSDave Kleikamp if (!journal) { 5447b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5448ac27a0ecSDave Kleikamp goto out_bdev; 5449ac27a0ecSDave Kleikamp } 5450ac27a0ecSDave Kleikamp journal->j_private = sb; 54512d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5452b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5453ac27a0ecSDave Kleikamp goto out_journal; 5454ac27a0ecSDave Kleikamp } 5455ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5456b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5457b31e1552SEric Sandeen "user (unsupported) - %d", 5458ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5459ac27a0ecSDave Kleikamp goto out_journal; 5460ac27a0ecSDave Kleikamp } 5461ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5462617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5463ac27a0ecSDave Kleikamp return journal; 54640b8e58a1SAndreas Dilger 5465ac27a0ecSDave Kleikamp out_journal: 5466dab291afSMingming Cao jbd2_journal_destroy(journal); 5467ac27a0ecSDave Kleikamp out_bdev: 5468617ba13bSMingming Cao ext4_blkdev_put(bdev); 5469ac27a0ecSDave Kleikamp return NULL; 5470ac27a0ecSDave Kleikamp } 5471ac27a0ecSDave Kleikamp 5472617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5473617ba13bSMingming Cao struct ext4_super_block *es, 5474ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5475ac27a0ecSDave Kleikamp { 5476ac27a0ecSDave Kleikamp journal_t *journal; 5477ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5478ac27a0ecSDave Kleikamp dev_t journal_dev; 5479ac27a0ecSDave Kleikamp int err = 0; 5480ac27a0ecSDave Kleikamp int really_read_only; 5481273108faSLukas Czerner int journal_dev_ro; 5482ac27a0ecSDave Kleikamp 548311215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 548411215630SJan Kara return -EFSCORRUPTED; 54850390131bSFrank Mayhar 5486ac27a0ecSDave Kleikamp if (journal_devnum && 5487ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5488b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5489b31e1552SEric Sandeen "numbers have changed"); 5490ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5491ac27a0ecSDave Kleikamp } else 5492ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5493ac27a0ecSDave Kleikamp 5494273108faSLukas Czerner if (journal_inum && journal_dev) { 5495273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5496273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5497273108faSLukas Czerner return -EINVAL; 5498273108faSLukas Czerner } 5499273108faSLukas Czerner 5500273108faSLukas Czerner if (journal_inum) { 5501273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5502273108faSLukas Czerner if (!journal) 5503273108faSLukas Czerner return -EINVAL; 5504273108faSLukas Czerner } else { 5505273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5506273108faSLukas Czerner if (!journal) 5507273108faSLukas Czerner return -EINVAL; 5508273108faSLukas Czerner } 5509273108faSLukas Czerner 5510273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5511273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5512273108faSLukas Czerner 5513273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5514273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5515273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5516273108faSLukas Czerner err = -EROFS; 5517273108faSLukas Czerner goto err_out; 5518273108faSLukas Czerner } 5519ac27a0ecSDave Kleikamp 5520ac27a0ecSDave Kleikamp /* 5521ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5522ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5523ac27a0ecSDave Kleikamp * can get read-write access to the device. 5524ac27a0ecSDave Kleikamp */ 5525e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5526bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5527b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5528b31e1552SEric Sandeen "required on readonly filesystem"); 5529ac27a0ecSDave Kleikamp if (really_read_only) { 5530b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5531d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5532d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5533273108faSLukas Czerner err = -EROFS; 5534273108faSLukas Czerner goto err_out; 5535ac27a0ecSDave Kleikamp } 5536b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5537b31e1552SEric Sandeen "be enabled during recovery"); 5538ac27a0ecSDave Kleikamp } 5539ac27a0ecSDave Kleikamp } 5540ac27a0ecSDave Kleikamp 554190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5542b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 55434776004fSTheodore Ts'o 5544e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5545dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 55461c13d5c0STheodore Ts'o if (!err) { 55471c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 55481c13d5c0STheodore Ts'o if (save) 55491c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 55501c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5551dab291afSMingming Cao err = jbd2_journal_load(journal); 55521c13d5c0STheodore Ts'o if (save) 55531c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 55541c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 55551c13d5c0STheodore Ts'o kfree(save); 55561c13d5c0STheodore Ts'o } 5557ac27a0ecSDave Kleikamp 5558ac27a0ecSDave Kleikamp if (err) { 5559b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5560273108faSLukas Czerner goto err_out; 5561ac27a0ecSDave Kleikamp } 5562ac27a0ecSDave Kleikamp 5563617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 556411215630SJan Kara err = ext4_clear_journal_err(sb, es); 556511215630SJan Kara if (err) { 556611215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 556711215630SJan Kara jbd2_journal_destroy(journal); 556811215630SJan Kara return err; 556911215630SJan Kara } 5570ac27a0ecSDave Kleikamp 5571c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5572ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5573ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5574ac27a0ecSDave Kleikamp 5575ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 55764392fbc4SJan Kara ext4_commit_super(sb); 5577ac27a0ecSDave Kleikamp } 5578ac27a0ecSDave Kleikamp 5579ac27a0ecSDave Kleikamp return 0; 5580273108faSLukas Czerner 5581273108faSLukas Czerner err_out: 5582273108faSLukas Czerner jbd2_journal_destroy(journal); 5583273108faSLukas Czerner return err; 5584ac27a0ecSDave Kleikamp } 5585ac27a0ecSDave Kleikamp 55862d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 55872d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5588ac27a0ecSDave Kleikamp { 5589c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5590e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5591e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5592ac27a0ecSDave Kleikamp 559305c2c00fSJan Kara lock_buffer(sbh); 5594a17712c8SJon Derrick /* 559571290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 559671290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 559771290b36STheodore Ts'o * write time when we are mounting the root file system 559871290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 559971290b36STheodore Ts'o * for people who are east of GMT and who make their clock 560071290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 560171290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 560271290b36STheodore Ts'o * to complain and force a full file system check. 560371290b36STheodore Ts'o */ 56041751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 56056a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5606afc32f7eSTheodore Ts'o es->s_kbytes_written = 5607e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 56088446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5609e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5610e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 561157042651STheodore Ts'o ext4_free_blocks_count_set(es, 5612e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5613e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5614e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 56157f93cff9STheodore Ts'o es->s_free_inodes_count = 56167f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5617e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5618c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5619c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5620c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5621c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5622c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5623c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5624c92dc856SJan Kara &es->s_first_error_time_hi, 5625c92dc856SJan Kara sbi->s_first_error_time); 5626c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5627c92dc856SJan Kara sizeof(es->s_first_error_func)); 5628c92dc856SJan Kara es->s_first_error_line = 5629c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5630c92dc856SJan Kara es->s_first_error_ino = 5631c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5632c92dc856SJan Kara es->s_first_error_block = 5633c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5634c92dc856SJan Kara es->s_first_error_errcode = 5635c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5636c92dc856SJan Kara } 5637c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5638c92dc856SJan Kara &es->s_last_error_time_hi, 5639c92dc856SJan Kara sbi->s_last_error_time); 5640c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5641c92dc856SJan Kara sizeof(es->s_last_error_func)); 5642c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5643c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5644c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5645c92dc856SJan Kara es->s_last_error_errcode = 5646c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5647c92dc856SJan Kara /* 5648c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5649c92dc856SJan Kara * started already 5650c92dc856SJan Kara */ 5651c92dc856SJan Kara if (!es->s_error_count) 5652c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5653c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5654c92dc856SJan Kara sbi->s_add_error_count = 0; 5655c92dc856SJan Kara } 5656c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5657c92dc856SJan Kara 565806db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 56592d01ddc8SJan Kara unlock_buffer(sbh); 56602d01ddc8SJan Kara } 56612d01ddc8SJan Kara 56622d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 56632d01ddc8SJan Kara { 56642d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 56652d01ddc8SJan Kara int error = 0; 56662d01ddc8SJan Kara 5667f88f1466SFengnan Chang if (!sbh) 5668f88f1466SFengnan Chang return -EINVAL; 5669f88f1466SFengnan Chang if (block_device_ejected(sb)) 5670f88f1466SFengnan Chang return -ENODEV; 56712d01ddc8SJan Kara 56722d01ddc8SJan Kara ext4_update_super(sb); 56732d01ddc8SJan Kara 5674e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 56754743f839SPranay Kr. Srivastava /* 56764743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 56774743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 56784743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 56794743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 56804743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 56814743f839SPranay Kr. Srivastava * write and hope for the best. 56824743f839SPranay Kr. Srivastava */ 56834743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 56844743f839SPranay Kr. Srivastava "superblock detected"); 56854743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 56864743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 56874743f839SPranay Kr. Srivastava } 56882d01ddc8SJan Kara BUFFER_TRACE(sbh, "marking dirty"); 5689ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5690564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 569100473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5692c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5694b31e1552SEric Sandeen "superblock"); 5695914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5696914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5697914258bfSTheodore Ts'o } 5698c4be0c1dSTakashi Sato return error; 5699ac27a0ecSDave Kleikamp } 5700ac27a0ecSDave Kleikamp 5701ac27a0ecSDave Kleikamp /* 5702ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5703ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5704ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5705ac27a0ecSDave Kleikamp */ 570611215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5707617ba13bSMingming Cao struct ext4_super_block *es) 5708ac27a0ecSDave Kleikamp { 570911215630SJan Kara int err; 5710617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5711ac27a0ecSDave Kleikamp 5712e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 571311215630SJan Kara if (journal != NULL) { 571411215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 571511215630SJan Kara "mounted!"); 571611215630SJan Kara return -EFSCORRUPTED; 571711215630SJan Kara } 571811215630SJan Kara return 0; 57190390131bSFrank Mayhar } 5720dab291afSMingming Cao jbd2_journal_lock_updates(journal); 572101d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 572211215630SJan Kara if (err < 0) 57237ffe1ea8SHidehiro Kawai goto out; 57247ffe1ea8SHidehiro Kawai 572502f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 572602f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 572702f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 572802f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 572902f310fcSJan Kara err = -EFSCORRUPTED; 573002f310fcSJan Kara goto out; 573102f310fcSJan Kara } 5732e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 573302f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 57344392fbc4SJan Kara ext4_commit_super(sb); 5735ac27a0ecSDave Kleikamp } 57367ffe1ea8SHidehiro Kawai out: 5737dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 573811215630SJan Kara return err; 5739ac27a0ecSDave Kleikamp } 5740ac27a0ecSDave Kleikamp 5741ac27a0ecSDave Kleikamp /* 5742ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5743ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 5744ac27a0ecSDave Kleikamp * main filesystem now. 5745ac27a0ecSDave Kleikamp */ 574611215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 5747617ba13bSMingming Cao struct ext4_super_block *es) 5748ac27a0ecSDave Kleikamp { 5749ac27a0ecSDave Kleikamp journal_t *journal; 5750ac27a0ecSDave Kleikamp int j_errno; 5751ac27a0ecSDave Kleikamp const char *errstr; 5752ac27a0ecSDave Kleikamp 575311215630SJan Kara if (!ext4_has_feature_journal(sb)) { 575411215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 575511215630SJan Kara return -EFSCORRUPTED; 575611215630SJan Kara } 57570390131bSFrank Mayhar 5758617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5759ac27a0ecSDave Kleikamp 5760ac27a0ecSDave Kleikamp /* 5761ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 5762617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 5763ac27a0ecSDave Kleikamp */ 5764ac27a0ecSDave Kleikamp 5765dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 5766ac27a0ecSDave Kleikamp if (j_errno) { 5767ac27a0ecSDave Kleikamp char nbuf[16]; 5768ac27a0ecSDave Kleikamp 5769617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 577012062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 5771ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 577212062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 5773ac27a0ecSDave Kleikamp 5774617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5775617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 57764392fbc4SJan Kara ext4_commit_super(sb); 5777ac27a0ecSDave Kleikamp 5778dab291afSMingming Cao jbd2_journal_clear_err(journal); 5779d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 5780ac27a0ecSDave Kleikamp } 578111215630SJan Kara return 0; 5782ac27a0ecSDave Kleikamp } 5783ac27a0ecSDave Kleikamp 5784ac27a0ecSDave Kleikamp /* 5785ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 5786ac27a0ecSDave Kleikamp * and wait on the commit. 5787ac27a0ecSDave Kleikamp */ 5788617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 5789ac27a0ecSDave Kleikamp { 5790ac27a0ecSDave Kleikamp journal_t *journal; 5791ac27a0ecSDave Kleikamp 5792bc98a42cSDavid Howells if (sb_rdonly(sb)) 5793ac27a0ecSDave Kleikamp return 0; 5794ac27a0ecSDave Kleikamp 5795617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5796b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 5797ac27a0ecSDave Kleikamp } 5798ac27a0ecSDave Kleikamp 5799617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 5800ac27a0ecSDave Kleikamp { 580114ce0cb4STheodore Ts'o int ret = 0; 58029eddacf9SJan Kara tid_t target; 580306a407f1SDmitry Monakhov bool needs_barrier = false; 58048d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5805ac27a0ecSDave Kleikamp 580649598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 58070db1ff22STheodore Ts'o return 0; 58080db1ff22STheodore Ts'o 58099bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 58102e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 5811a1177825SJan Kara /* 5812a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 5813a1177825SJan Kara * no dirty dquots 5814a1177825SJan Kara */ 5815a1177825SJan Kara dquot_writeback_dquots(sb, -1); 581606a407f1SDmitry Monakhov /* 581706a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 581806a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 581906a407f1SDmitry Monakhov * transaction_commit will do it for us. 582006a407f1SDmitry Monakhov */ 5821bda32530STheodore Ts'o if (sbi->s_journal) { 582206a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 582306a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 582406a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 582506a407f1SDmitry Monakhov needs_barrier = true; 582606a407f1SDmitry Monakhov 58278d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 5828ac27a0ecSDave Kleikamp if (wait) 5829bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 5830bda32530STheodore Ts'o target); 58310390131bSFrank Mayhar } 5832bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5833bda32530STheodore Ts'o needs_barrier = true; 583406a407f1SDmitry Monakhov if (needs_barrier) { 583506a407f1SDmitry Monakhov int err; 5836c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 583706a407f1SDmitry Monakhov if (!ret) 583806a407f1SDmitry Monakhov ret = err; 583906a407f1SDmitry Monakhov } 584006a407f1SDmitry Monakhov 584106a407f1SDmitry Monakhov return ret; 584206a407f1SDmitry Monakhov } 584306a407f1SDmitry Monakhov 5844ac27a0ecSDave Kleikamp /* 5845ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5846ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5847be4f27d3SYongqiang Yang * 5848be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 58498e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 58508e8ad8a5SJan Kara * modifications. 5851ac27a0ecSDave Kleikamp */ 5852c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5853ac27a0ecSDave Kleikamp { 5854c4be0c1dSTakashi Sato int error = 0; 5855c4be0c1dSTakashi Sato journal_t *journal; 5856ac27a0ecSDave Kleikamp 5857bc98a42cSDavid Howells if (sb_rdonly(sb)) 58589ca92389STheodore Ts'o return 0; 58599ca92389STheodore Ts'o 5860c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5861ac27a0ecSDave Kleikamp 5862bb044576STheodore Ts'o if (journal) { 5863ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5864dab291afSMingming Cao jbd2_journal_lock_updates(journal); 58657ffe1ea8SHidehiro Kawai 58667ffe1ea8SHidehiro Kawai /* 5867bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5868bb044576STheodore Ts'o * flush the journal. 58697ffe1ea8SHidehiro Kawai */ 587001d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 58716b0310fbSEric Sandeen if (error < 0) 58726b0310fbSEric Sandeen goto out; 5873ac27a0ecSDave Kleikamp 5874ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5875e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 587602f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 587702f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 5878c642dc9eSEric Sandeen } 5879c642dc9eSEric Sandeen 58804392fbc4SJan Kara error = ext4_commit_super(sb); 58816b0310fbSEric Sandeen out: 5882bb044576STheodore Ts'o if (journal) 58838e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5884bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 58856b0310fbSEric Sandeen return error; 5886ac27a0ecSDave Kleikamp } 5887ac27a0ecSDave Kleikamp 5888ac27a0ecSDave Kleikamp /* 5889ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5890ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5891ac27a0ecSDave Kleikamp */ 5892c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5893ac27a0ecSDave Kleikamp { 5894bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 58959ca92389STheodore Ts'o return 0; 58969ca92389STheodore Ts'o 5897c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 58989ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5899e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 590002f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 590102f310fcSJan Kara ext4_set_feature_orphan_present(sb); 5902c642dc9eSEric Sandeen } 5903c642dc9eSEric Sandeen 59044392fbc4SJan Kara ext4_commit_super(sb); 5905c4be0c1dSTakashi Sato return 0; 5906ac27a0ecSDave Kleikamp } 5907ac27a0ecSDave Kleikamp 5908673c6100STheodore Ts'o /* 5909673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5910673c6100STheodore Ts'o */ 5911673c6100STheodore Ts'o struct ext4_mount_options { 5912673c6100STheodore Ts'o unsigned long s_mount_opt; 5913a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 591408cefc7aSEric W. Biederman kuid_t s_resuid; 591508cefc7aSEric W. Biederman kgid_t s_resgid; 5916673c6100STheodore Ts'o unsigned long s_commit_interval; 5917673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5918673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5919673c6100STheodore Ts'o int s_jquota_fmt; 5920a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5921673c6100STheodore Ts'o #endif 5922673c6100STheodore Ts'o }; 5923673c6100STheodore Ts'o 5924617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5925ac27a0ecSDave Kleikamp { 5926617ba13bSMingming Cao struct ext4_super_block *es; 5927617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5928f25391ebSLukas Czerner unsigned long old_sb_flags, vfs_flags; 5929617ba13bSMingming Cao struct ext4_mount_options old_opts; 59308a266467STheodore Ts'o ext4_group_t g; 5931c5e06d10SJohann Lombardi int err = 0; 5932ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 59333bbef91bSAustin Kim int enable_quota = 0; 593403dafb5fSChen Gang int i, j; 593533458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 5936ac27a0ecSDave Kleikamp #endif 5937d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5938*461c3af0SLukas Czerner struct ext4_fs_context parsed_opts; 5939b237e304SHarshad Shirwadkar 5940b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5941b237e304SHarshad Shirwadkar parsed_opts.journal_devnum = 0; 5942ac27a0ecSDave Kleikamp 594321ac738eSChengguang Xu if (data && !orig_data) 594421ac738eSChengguang Xu return -ENOMEM; 594521ac738eSChengguang Xu 5946ac27a0ecSDave Kleikamp /* Store the original options */ 5947ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5948ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5949a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5950ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5951ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5952ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 595330773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 595430773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5955ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5956ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5957a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 595803dafb5fSChen Gang if (sbi->s_qf_names[i]) { 595933458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 596033458eabSTheodore Ts'o 596133458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 596203dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 596303dafb5fSChen Gang for (j = 0; j < i; j++) 596403dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 59653e36a163SWei Yongjun kfree(orig_data); 596603dafb5fSChen Gang return -ENOMEM; 596703dafb5fSChen Gang } 596803dafb5fSChen Gang } else 596903dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5970ac27a0ecSDave Kleikamp #endif 5971b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5972b237e304SHarshad Shirwadkar parsed_opts.journal_ioprio = 5973b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 5974ac27a0ecSDave Kleikamp 5975f25391ebSLukas Czerner /* 5976f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 5977f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 5978f25391ebSLukas Czerner * s_flags. Copy those selected flags from *flags to s_flags 5979f25391ebSLukas Czerner */ 5980f25391ebSLukas Czerner vfs_flags = SB_LAZYTIME | SB_I_VERSION; 5981f25391ebSLukas Czerner sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags); 5982f25391ebSLukas Czerner 5983b237e304SHarshad Shirwadkar if (!parse_options(data, sb, &parsed_opts, 1)) { 5984ac27a0ecSDave Kleikamp err = -EINVAL; 5985ac27a0ecSDave Kleikamp goto restore_opts; 5986ac27a0ecSDave Kleikamp } 5987ac27a0ecSDave Kleikamp 59886b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 59896b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 59906b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 59912d5b86e0SEric Sandeen "during remount not supported; ignoring"); 59922d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5993c6d3d56dSDarrick J. Wong } 5994c6d3d56dSDarrick J. Wong 59956ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 59966ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 59976ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 59986ae6514bSPiotr Sarna "both data=journal and delalloc"); 59996ae6514bSPiotr Sarna err = -EINVAL; 60006ae6514bSPiotr Sarna goto restore_opts; 60016ae6514bSPiotr Sarna } 60026ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 60036ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 60046ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 60056ae6514bSPiotr Sarna err = -EINVAL; 60066ae6514bSPiotr Sarna goto restore_opts; 60076ae6514bSPiotr Sarna } 6008ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6009ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6010ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6011ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6012ab04df78SJan Kara err = -EINVAL; 6013ab04df78SJan Kara goto restore_opts; 6014ab04df78SJan Kara } 6015923ae0ffSRoss Zwisler } 6016923ae0ffSRoss Zwisler 6017cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6018cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6019cdb7ee4cSTahsin Erdogan err = -EINVAL; 6020cdb7ee4cSTahsin Erdogan goto restore_opts; 6021cdb7ee4cSTahsin Erdogan } 6022cdb7ee4cSTahsin Erdogan 60239b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6024124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6025ac27a0ecSDave Kleikamp 60261751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 60271751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6028ac27a0ecSDave Kleikamp 6029ac27a0ecSDave Kleikamp es = sbi->s_es; 6030ac27a0ecSDave Kleikamp 6031b3881f74STheodore Ts'o if (sbi->s_journal) { 6032617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 6033b237e304SHarshad Shirwadkar set_task_ioprio(sbi->s_journal->j_task, parsed_opts.journal_ioprio); 6034b3881f74STheodore Ts'o } 6035ac27a0ecSDave Kleikamp 6036c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6037c92dc856SJan Kara flush_work(&sbi->s_error_work); 6038c92dc856SJan Kara 60391751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 60409b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6041ac27a0ecSDave Kleikamp err = -EROFS; 6042ac27a0ecSDave Kleikamp goto restore_opts; 6043ac27a0ecSDave Kleikamp } 6044ac27a0ecSDave Kleikamp 60451751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 604638c03b34STheodore Ts'o err = sync_filesystem(sb); 604738c03b34STheodore Ts'o if (err < 0) 604838c03b34STheodore Ts'o goto restore_opts; 60490f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 60500f0dd62fSChristoph Hellwig if (err < 0) 6051c79d967dSChristoph Hellwig goto restore_opts; 6052c79d967dSChristoph Hellwig 6053ac27a0ecSDave Kleikamp /* 6054ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6055ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6056ac27a0ecSDave Kleikamp */ 60571751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6058ac27a0ecSDave Kleikamp 6059ac27a0ecSDave Kleikamp /* 6060ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6061ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6062ac27a0ecSDave Kleikamp * mark the partition as valid again. 6063ac27a0ecSDave Kleikamp */ 6064617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6065617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6066ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6067ac27a0ecSDave Kleikamp 606811215630SJan Kara if (sbi->s_journal) { 606911215630SJan Kara /* 607011215630SJan Kara * We let remount-ro finish even if marking fs 607111215630SJan Kara * as clean failed... 607211215630SJan Kara */ 6073617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 607411215630SJan Kara } 6075ac27a0ecSDave Kleikamp } else { 6076a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6077e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 60782cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6079ac27a0ecSDave Kleikamp err = -EROFS; 6080ac27a0ecSDave Kleikamp goto restore_opts; 6081ac27a0ecSDave Kleikamp } 6082ead6596bSEric Sandeen /* 60838a266467STheodore Ts'o * Make sure the group descriptor checksums 60840b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 60858a266467STheodore Ts'o */ 60868a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 60878a266467STheodore Ts'o struct ext4_group_desc *gdp = 60888a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 60898a266467STheodore Ts'o 6090feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6091b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6092b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6093e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 60948a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 60956a797d27SDarrick J. Wong err = -EFSBADCRC; 60968a266467STheodore Ts'o goto restore_opts; 60978a266467STheodore Ts'o } 60988a266467STheodore Ts'o } 60998a266467STheodore Ts'o 61008a266467STheodore Ts'o /* 6101ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6102ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6103ead6596bSEric Sandeen * require a full umount/remount for now. 6104ead6596bSEric Sandeen */ 610502f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6106b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6107ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6108ead6596bSEric Sandeen "orphan inode list. Please " 6109b31e1552SEric Sandeen "umount/remount instead"); 6110ead6596bSEric Sandeen err = -EINVAL; 6111ead6596bSEric Sandeen goto restore_opts; 6112ead6596bSEric Sandeen } 6113ead6596bSEric Sandeen 6114ac27a0ecSDave Kleikamp /* 6115ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6116ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6117ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6118ac27a0ecSDave Kleikamp * the partition.) 6119ac27a0ecSDave Kleikamp */ 612011215630SJan Kara if (sbi->s_journal) { 612111215630SJan Kara err = ext4_clear_journal_err(sb, es); 612211215630SJan Kara if (err) 612311215630SJan Kara goto restore_opts; 612411215630SJan Kara } 6125ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 6126c89128a0SJaegeuk Kim 6127c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6128c89128a0SJaegeuk Kim if (err) 6129c89128a0SJaegeuk Kim goto restore_opts; 6130c89128a0SJaegeuk Kim 61311751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6132e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6133c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6134c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6135c5e06d10SJohann Lombardi err = -EROFS; 6136c5e06d10SJohann Lombardi goto restore_opts; 6137c5e06d10SJohann Lombardi } 61383bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6139c79d967dSChristoph Hellwig enable_quota = 1; 61403bbef91bSAustin Kim #endif 6141ac27a0ecSDave Kleikamp } 6142ac27a0ecSDave Kleikamp } 6143bfff6873SLukas Czerner 6144bfff6873SLukas Czerner /* 6145bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6146bfff6873SLukas Czerner * current settings 6147bfff6873SLukas Czerner */ 6148bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6149bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6150bfff6873SLukas Czerner else { 6151bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6152bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6153bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6154bfff6873SLukas Czerner } 6155bfff6873SLukas Czerner 61560f5bde1dSJan Kara /* 61570f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 61580f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 61590f5bde1dSJan Kara * succeed. 61600f5bde1dSJan Kara */ 6161dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6162d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6163d176b1f6SJan Kara if (err) 6164d176b1f6SJan Kara goto restore_opts; 61650f5bde1dSJan Kara } 6166d176b1f6SJan Kara 6167c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 61684392fbc4SJan Kara err = ext4_commit_super(sb); 6169c89128a0SJaegeuk Kim if (err) 6170c89128a0SJaegeuk Kim goto restore_opts; 6171c89128a0SJaegeuk Kim } 61720390131bSFrank Mayhar 6173ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6174ac27a0ecSDave Kleikamp /* Release old quota file names */ 6175a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6176ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 61777c319d32SAditya Kali if (enable_quota) { 61787c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 61790f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6180e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 61817c319d32SAditya Kali err = ext4_enable_quotas(sb); 618207724f98STheodore Ts'o if (err) 61837c319d32SAditya Kali goto restore_opts; 61847c319d32SAditya Kali } 61857c319d32SAditya Kali } 61867c319d32SAditya Kali #endif 6187dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 61880f5bde1dSJan Kara ext4_release_system_zone(sb); 6189d4c402d9SCurt Wohlgemuth 619061bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 619161bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 619261bb4a1cSTheodore Ts'o 6193f25391ebSLukas Czerner /* 6194f25391ebSLukas Czerner * Some options can be enabled by ext4 and/or by VFS mount flag 6195f25391ebSLukas Czerner * either way we need to make sure it matches in both *flags and 6196f25391ebSLukas Czerner * s_flags. Copy those selected flags from s_flags to *flags 6197f25391ebSLukas Czerner */ 6198f25391ebSLukas Czerner *flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags); 6199f25391ebSLukas Czerner 6200ca9b404fSRoman Anufriev ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s. Quota mode: %s.", 6201ca9b404fSRoman Anufriev orig_data, ext4_quota_mode(sb)); 6202d4c402d9SCurt Wohlgemuth kfree(orig_data); 6203ac27a0ecSDave Kleikamp return 0; 62040b8e58a1SAndreas Dilger 6205ac27a0ecSDave Kleikamp restore_opts: 6206ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6207ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6208a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6209ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6210ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6211ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 621230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 621330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6214dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 62150f5bde1dSJan Kara ext4_release_system_zone(sb); 6216ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6217ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6218a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 621933458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 622033458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6221ac27a0ecSDave Kleikamp } 622233458eabSTheodore Ts'o synchronize_rcu(); 622333458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 622433458eabSTheodore Ts'o kfree(to_free[i]); 6225ac27a0ecSDave Kleikamp #endif 622661bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 622761bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6228d4c402d9SCurt Wohlgemuth kfree(orig_data); 6229ac27a0ecSDave Kleikamp return err; 6230ac27a0ecSDave Kleikamp } 6231ac27a0ecSDave Kleikamp 6232689c958cSLi Xi #ifdef CONFIG_QUOTA 6233689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6234689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6235689c958cSLi Xi { 6236689c958cSLi Xi struct kqid qid; 6237689c958cSLi Xi struct dquot *dquot; 6238689c958cSLi Xi u64 limit; 6239689c958cSLi Xi u64 curblock; 6240689c958cSLi Xi 6241689c958cSLi Xi qid = make_kqid_projid(projid); 6242689c958cSLi Xi dquot = dqget(sb, qid); 6243689c958cSLi Xi if (IS_ERR(dquot)) 6244689c958cSLi Xi return PTR_ERR(dquot); 62457b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6246689c958cSLi Xi 6247a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6248a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 624957c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 625057c32ea4SChengguang Xu 6251689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6252f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6253f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6254689c958cSLi Xi buf->f_blocks = limit; 6255689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6256689c958cSLi Xi (buf->f_blocks > curblock) ? 6257689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6258689c958cSLi Xi } 6259689c958cSLi Xi 6260a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6261a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6262689c958cSLi Xi if (limit && buf->f_files > limit) { 6263689c958cSLi Xi buf->f_files = limit; 6264689c958cSLi Xi buf->f_ffree = 6265689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6266689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6267689c958cSLi Xi } 6268689c958cSLi Xi 62697b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6270689c958cSLi Xi dqput(dquot); 6271689c958cSLi Xi return 0; 6272689c958cSLi Xi } 6273689c958cSLi Xi #endif 6274689c958cSLi Xi 6275617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6276ac27a0ecSDave Kleikamp { 6277ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6278617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6279617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 628027dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6281d02a9391SKazuya Mio s64 bfree; 628227dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6283ac27a0ecSDave Kleikamp 6284952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6285952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6286ac27a0ecSDave Kleikamp 6287617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6288ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6289b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 629057042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 629157042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6292d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 629357042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 629427dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 629527dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 629627dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6297ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6298ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 629952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6300617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 63019591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 63020b8e58a1SAndreas Dilger 6303689c958cSLi Xi #ifdef CONFIG_QUOTA 6304689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6305689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6306689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6307689c958cSLi Xi #endif 6308ac27a0ecSDave Kleikamp return 0; 6309ac27a0ecSDave Kleikamp } 6310ac27a0ecSDave Kleikamp 6311ac27a0ecSDave Kleikamp 6312ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6313ac27a0ecSDave Kleikamp 6314bc8230eeSJan Kara /* 6315bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6316bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6317bc8230eeSJan Kara */ 6318ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6319ac27a0ecSDave Kleikamp { 63204c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6321ac27a0ecSDave Kleikamp } 6322ac27a0ecSDave Kleikamp 6323617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6324ac27a0ecSDave Kleikamp { 6325ac27a0ecSDave Kleikamp int ret, err; 6326ac27a0ecSDave Kleikamp handle_t *handle; 6327ac27a0ecSDave Kleikamp struct inode *inode; 6328ac27a0ecSDave Kleikamp 6329ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 63309924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6331617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6332ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6333ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6334ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6335617ba13bSMingming Cao err = ext4_journal_stop(handle); 6336ac27a0ecSDave Kleikamp if (!ret) 6337ac27a0ecSDave Kleikamp ret = err; 6338ac27a0ecSDave Kleikamp return ret; 6339ac27a0ecSDave Kleikamp } 6340ac27a0ecSDave Kleikamp 6341617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6342ac27a0ecSDave Kleikamp { 6343ac27a0ecSDave Kleikamp int ret, err; 6344ac27a0ecSDave Kleikamp handle_t *handle; 6345ac27a0ecSDave Kleikamp 63469924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6347617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6348ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6349ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6350ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6351617ba13bSMingming Cao err = ext4_journal_stop(handle); 6352ac27a0ecSDave Kleikamp if (!ret) 6353ac27a0ecSDave Kleikamp ret = err; 6354ac27a0ecSDave Kleikamp return ret; 6355ac27a0ecSDave Kleikamp } 6356ac27a0ecSDave Kleikamp 6357617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6358ac27a0ecSDave Kleikamp { 6359ac27a0ecSDave Kleikamp int ret, err; 6360ac27a0ecSDave Kleikamp handle_t *handle; 6361ac27a0ecSDave Kleikamp 63629924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6363617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 63649c3013e9SJan Kara if (IS_ERR(handle)) { 63659c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 63669c3013e9SJan Kara dquot_release(dquot); 6367ac27a0ecSDave Kleikamp return PTR_ERR(handle); 63689c3013e9SJan Kara } 6369ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6370617ba13bSMingming Cao err = ext4_journal_stop(handle); 6371ac27a0ecSDave Kleikamp if (!ret) 6372ac27a0ecSDave Kleikamp ret = err; 6373ac27a0ecSDave Kleikamp return ret; 6374ac27a0ecSDave Kleikamp } 6375ac27a0ecSDave Kleikamp 6376617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6377ac27a0ecSDave Kleikamp { 6378262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6379262b4662SJan Kara 6380f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6381ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6382617ba13bSMingming Cao return ext4_write_dquot(dquot); 6383ac27a0ecSDave Kleikamp } else { 6384ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6385ac27a0ecSDave Kleikamp } 6386ac27a0ecSDave Kleikamp } 6387ac27a0ecSDave Kleikamp 6388617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6389ac27a0ecSDave Kleikamp { 6390ac27a0ecSDave Kleikamp int ret, err; 6391ac27a0ecSDave Kleikamp handle_t *handle; 6392ac27a0ecSDave Kleikamp 6393ac27a0ecSDave Kleikamp /* Data block + inode block */ 63942b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 6395ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6396ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6397ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6398617ba13bSMingming Cao err = ext4_journal_stop(handle); 6399ac27a0ecSDave Kleikamp if (!ret) 6400ac27a0ecSDave Kleikamp ret = err; 6401ac27a0ecSDave Kleikamp return ret; 6402ac27a0ecSDave Kleikamp } 6403ac27a0ecSDave Kleikamp 6404daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6405daf647d2STheodore Ts'o { 6406daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6407daf647d2STheodore Ts'o 6408daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6409daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6410daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6411daf647d2STheodore Ts'o * because the name of the lock is set using the 6412daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6413daf647d2STheodore Ts'o */ 6414daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6415daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6416daf647d2STheodore Ts'o } 6417daf647d2STheodore Ts'o 6418ac27a0ecSDave Kleikamp /* 6419ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6420ac27a0ecSDave Kleikamp */ 6421617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 64228c54ca9cSAl Viro const struct path *path) 6423ac27a0ecSDave Kleikamp { 6424ac27a0ecSDave Kleikamp int err; 6425ac27a0ecSDave Kleikamp 6426ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6427ac27a0ecSDave Kleikamp return -EINVAL; 64280623543bSJan Kara 6429ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6430d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6431ac27a0ecSDave Kleikamp return -EXDEV; 6432e0770e91SJan Kara 6433e0770e91SJan Kara /* Quota already enabled for this file? */ 6434e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6435e0770e91SJan Kara return -EBUSY; 6436e0770e91SJan Kara 64370623543bSJan Kara /* Journaling quota? */ 64380623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 64392b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6440f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6441b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6442b31e1552SEric Sandeen "Quota file not on filesystem root. " 6443b31e1552SEric Sandeen "Journaled quota will not work"); 644491389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 644591389240SJan Kara } else { 644691389240SJan Kara /* 644791389240SJan Kara * Clear the flag just in case mount options changed since 644891389240SJan Kara * last time. 644991389240SJan Kara */ 645091389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 64510623543bSJan Kara } 64520623543bSJan Kara 64530623543bSJan Kara /* 64540623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 64550623543bSJan Kara * all updates to the file when we bypass pagecache... 64560623543bSJan Kara */ 64570390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 64582b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 64590623543bSJan Kara /* 64600623543bSJan Kara * We don't need to lock updates but journal_flush() could 64610623543bSJan Kara * otherwise be livelocked... 64620623543bSJan Kara */ 64630623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 646401d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 64650623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6466f00c9e44SJan Kara if (err) 64677ffe1ea8SHidehiro Kawai return err; 64687ffe1ea8SHidehiro Kawai } 6469957153fcSJan Kara 6470daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6471daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6472957153fcSJan Kara if (err) { 6473daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6474daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6475957153fcSJan Kara } else { 6476957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6477957153fcSJan Kara handle_t *handle; 6478957153fcSJan Kara 647961a92987SJan Kara /* 648061a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 648161a92987SJan Kara * files. If this fails, we return success anyway since quotas 648261a92987SJan Kara * are already enabled and this is not a hard failure. 648361a92987SJan Kara */ 6484957153fcSJan Kara inode_lock(inode); 6485957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6486957153fcSJan Kara if (IS_ERR(handle)) 6487957153fcSJan Kara goto unlock_inode; 6488957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6489957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6490957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 64914209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6492957153fcSJan Kara ext4_journal_stop(handle); 6493957153fcSJan Kara unlock_inode: 6494957153fcSJan Kara inode_unlock(inode); 6495957153fcSJan Kara } 6496daf647d2STheodore Ts'o return err; 6497ac27a0ecSDave Kleikamp } 6498ac27a0ecSDave Kleikamp 64997c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 65007c319d32SAditya Kali unsigned int flags) 65017c319d32SAditya Kali { 65027c319d32SAditya Kali int err; 65037c319d32SAditya Kali struct inode *qf_inode; 6504a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 65057c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6506689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6507689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 65087c319d32SAditya Kali }; 65097c319d32SAditya Kali 6510e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 65117c319d32SAditya Kali 65127c319d32SAditya Kali if (!qf_inums[type]) 65137c319d32SAditya Kali return -EPERM; 65147c319d32SAditya Kali 65158a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 65167c319d32SAditya Kali if (IS_ERR(qf_inode)) { 65177c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 65187c319d32SAditya Kali return PTR_ERR(qf_inode); 65197c319d32SAditya Kali } 65207c319d32SAditya Kali 6521bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6522bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6523daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 65247212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6525daf647d2STheodore Ts'o if (err) 6526daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 652761157b24SPan Bian iput(qf_inode); 65287c319d32SAditya Kali 65297c319d32SAditya Kali return err; 65307c319d32SAditya Kali } 65317c319d32SAditya Kali 65327c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 653325c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 65347c319d32SAditya Kali { 65357c319d32SAditya Kali int type, err = 0; 6536a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 65377c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6538689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6539689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 65407c319d32SAditya Kali }; 654149da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 654249da9392SJan Kara test_opt(sb, USRQUOTA), 654349da9392SJan Kara test_opt(sb, GRPQUOTA), 654449da9392SJan Kara test_opt(sb, PRJQUOTA), 654549da9392SJan Kara }; 65467c319d32SAditya Kali 654791389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6548a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 65497c319d32SAditya Kali if (qf_inums[type]) { 65507c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 655149da9392SJan Kara DQUOT_USAGE_ENABLED | 655249da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 65537c319d32SAditya Kali if (err) { 65547c319d32SAditya Kali ext4_warning(sb, 655572ba7450STheodore Ts'o "Failed to enable quota tracking " 655672ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 655772ba7450STheodore Ts'o "e2fsck to fix.", type, err); 65587f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 65597f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 65607f144fd0SJunichi Uekawa 65617c319d32SAditya Kali return err; 65627c319d32SAditya Kali } 65637c319d32SAditya Kali } 65647c319d32SAditya Kali } 65657c319d32SAditya Kali return 0; 65667c319d32SAditya Kali } 65677c319d32SAditya Kali 6568ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6569ca0e05e4SDmitry Monakhov { 657021f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 657121f97697SJan Kara handle_t *handle; 6572957153fcSJan Kara int err; 657321f97697SJan Kara 657487009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 657587009d86SDmitry Monakhov * Caller already holds s_umount sem */ 657687009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6577ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6578ca0e05e4SDmitry Monakhov 6579957153fcSJan Kara if (!inode || !igrab(inode)) 65800b268590SAmir Goldstein goto out; 65810b268590SAmir Goldstein 6582957153fcSJan Kara err = dquot_quota_off(sb, type); 6583964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6584957153fcSJan Kara goto out_put; 6585957153fcSJan Kara 6586957153fcSJan Kara inode_lock(inode); 658761a92987SJan Kara /* 658861a92987SJan Kara * Update modification times of quota files when userspace can 658961a92987SJan Kara * start looking at them. If we fail, we return success anyway since 659061a92987SJan Kara * this is not a hard failure and quotas are already disabled. 659161a92987SJan Kara */ 65929924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 65934209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 65944209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6595957153fcSJan Kara goto out_unlock; 65964209ae12SHarshad Shirwadkar } 6597957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6598957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6599eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 66004209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 660121f97697SJan Kara ext4_journal_stop(handle); 6602957153fcSJan Kara out_unlock: 6603957153fcSJan Kara inode_unlock(inode); 6604957153fcSJan Kara out_put: 6605964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6606957153fcSJan Kara iput(inode); 6607957153fcSJan Kara return err; 660821f97697SJan Kara out: 6609ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6610ca0e05e4SDmitry Monakhov } 6611ca0e05e4SDmitry Monakhov 6612ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6613ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6614ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6615ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6616617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6617ac27a0ecSDave Kleikamp size_t len, loff_t off) 6618ac27a0ecSDave Kleikamp { 6619ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6620725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6621ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6622ac27a0ecSDave Kleikamp int tocopy; 6623ac27a0ecSDave Kleikamp size_t toread; 6624ac27a0ecSDave Kleikamp struct buffer_head *bh; 6625ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6626ac27a0ecSDave Kleikamp 6627ac27a0ecSDave Kleikamp if (off > i_size) 6628ac27a0ecSDave Kleikamp return 0; 6629ac27a0ecSDave Kleikamp if (off+len > i_size) 6630ac27a0ecSDave Kleikamp len = i_size-off; 6631ac27a0ecSDave Kleikamp toread = len; 6632ac27a0ecSDave Kleikamp while (toread > 0) { 6633ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6634ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 66351c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 66361c215028STheodore Ts'o if (IS_ERR(bh)) 66371c215028STheodore Ts'o return PTR_ERR(bh); 6638ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6639ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6640ac27a0ecSDave Kleikamp else 6641ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6642ac27a0ecSDave Kleikamp brelse(bh); 6643ac27a0ecSDave Kleikamp offset = 0; 6644ac27a0ecSDave Kleikamp toread -= tocopy; 6645ac27a0ecSDave Kleikamp data += tocopy; 6646ac27a0ecSDave Kleikamp blk++; 6647ac27a0ecSDave Kleikamp } 6648ac27a0ecSDave Kleikamp return len; 6649ac27a0ecSDave Kleikamp } 6650ac27a0ecSDave Kleikamp 6651ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6652ac27a0ecSDave Kleikamp * enough credits) */ 6653617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6654ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6655ac27a0ecSDave Kleikamp { 6656ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6657725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 66584209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6659c5e298aeSTheodore Ts'o int retries = 0; 6660ac27a0ecSDave Kleikamp struct buffer_head *bh; 6661ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6662ac27a0ecSDave Kleikamp 66630390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 6664b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6665b31e1552SEric Sandeen " cancelled because transaction is not started", 66669c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 66679c3013e9SJan Kara return -EIO; 66689c3013e9SJan Kara } 666967eeb568SDmitry Monakhov /* 667067eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 667167eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 667267eeb568SDmitry Monakhov */ 667367eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 667467eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 667567eeb568SDmitry Monakhov " cancelled because not block aligned", 667667eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 667767eeb568SDmitry Monakhov return -EIO; 667867eeb568SDmitry Monakhov } 667967eeb568SDmitry Monakhov 6680c5e298aeSTheodore Ts'o do { 6681c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6682c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6683c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 668445586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6685c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 66861c215028STheodore Ts'o if (IS_ERR(bh)) 66871c215028STheodore Ts'o return PTR_ERR(bh); 6688ac27a0ecSDave Kleikamp if (!bh) 6689ac27a0ecSDave Kleikamp goto out; 66905d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6691188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 6692ac27a0ecSDave Kleikamp if (err) { 6693ac27a0ecSDave Kleikamp brelse(bh); 66941c215028STheodore Ts'o return err; 6695ac27a0ecSDave Kleikamp } 6696ac27a0ecSDave Kleikamp lock_buffer(bh); 669767eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6698ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6699ac27a0ecSDave Kleikamp unlock_buffer(bh); 67000390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6701ac27a0ecSDave Kleikamp brelse(bh); 6702ac27a0ecSDave Kleikamp out: 670367eeb568SDmitry Monakhov if (inode->i_size < off + len) { 670467eeb568SDmitry Monakhov i_size_write(inode, off + len); 6705617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 67064209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 67074209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 67084209ae12SHarshad Shirwadkar err = err2; 670921f97697SJan Kara } 67104209ae12SHarshad Shirwadkar return err ? err : len; 6711ac27a0ecSDave Kleikamp } 6712ac27a0ecSDave Kleikamp #endif 6713ac27a0ecSDave Kleikamp 6714152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 6715152a0836SAl Viro const char *dev_name, void *data) 6716ac27a0ecSDave Kleikamp { 6717152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 6718ac27a0ecSDave Kleikamp } 6719ac27a0ecSDave Kleikamp 6720c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 672124b58424STheodore Ts'o static inline void register_as_ext2(void) 672224b58424STheodore Ts'o { 672324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 672424b58424STheodore Ts'o if (err) 672524b58424STheodore Ts'o printk(KERN_WARNING 672624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 672724b58424STheodore Ts'o } 672824b58424STheodore Ts'o 672924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 673024b58424STheodore Ts'o { 673124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 673224b58424STheodore Ts'o } 67332035e776STheodore Ts'o 67342035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 67352035e776STheodore Ts'o { 6736e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 67372035e776STheodore Ts'o return 0; 6738bc98a42cSDavid Howells if (sb_rdonly(sb)) 67392035e776STheodore Ts'o return 1; 6740e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 67412035e776STheodore Ts'o return 0; 67422035e776STheodore Ts'o return 1; 67432035e776STheodore Ts'o } 674424b58424STheodore Ts'o #else 674524b58424STheodore Ts'o static inline void register_as_ext2(void) { } 674624b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 67472035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 674824b58424STheodore Ts'o #endif 674924b58424STheodore Ts'o 675024b58424STheodore Ts'o static inline void register_as_ext3(void) 675124b58424STheodore Ts'o { 675224b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 675324b58424STheodore Ts'o if (err) 675424b58424STheodore Ts'o printk(KERN_WARNING 675524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 675624b58424STheodore Ts'o } 675724b58424STheodore Ts'o 675824b58424STheodore Ts'o static inline void unregister_as_ext3(void) 675924b58424STheodore Ts'o { 676024b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 676124b58424STheodore Ts'o } 67622035e776STheodore Ts'o 67632035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 67642035e776STheodore Ts'o { 6765e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 67662035e776STheodore Ts'o return 0; 6767e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 67682035e776STheodore Ts'o return 0; 6769bc98a42cSDavid Howells if (sb_rdonly(sb)) 67702035e776STheodore Ts'o return 1; 6771e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 67722035e776STheodore Ts'o return 0; 67732035e776STheodore Ts'o return 1; 67742035e776STheodore Ts'o } 677524b58424STheodore Ts'o 677603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 6777ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 677803010a33STheodore Ts'o .name = "ext4", 6779152a0836SAl Viro .mount = ext4_mount, 6780ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 678114f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 6782ac27a0ecSDave Kleikamp }; 67837f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 6784ac27a0ecSDave Kleikamp 6785e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 6786e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 6787e9e3bcecSEric Sandeen 67885dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 6789ac27a0ecSDave Kleikamp { 6790e9e3bcecSEric Sandeen int i, err; 6791c9de560dSAlex Tomas 6792e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 679307c0c5d8SAl Viro ext4_li_info = NULL; 679407c0c5d8SAl Viro 67959a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 679612e9b892SDmitry Monakhov ext4_check_flag_values(); 6797e9e3bcecSEric Sandeen 6798e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 6799e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 6800e9e3bcecSEric Sandeen 680151865fdaSZheng Liu err = ext4_init_es(); 68026fd058f7STheodore Ts'o if (err) 68036fd058f7STheodore Ts'o return err; 680451865fdaSZheng Liu 68051dc0aa46SEric Whitney err = ext4_init_pending(); 68061dc0aa46SEric Whitney if (err) 680722cfe4b4SEric Biggers goto out7; 680822cfe4b4SEric Biggers 680922cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 681022cfe4b4SEric Biggers if (err) 68111dc0aa46SEric Whitney goto out6; 68121dc0aa46SEric Whitney 681351865fdaSZheng Liu err = ext4_init_pageio(); 681451865fdaSZheng Liu if (err) 6815b5799018STheodore Ts'o goto out5; 681651865fdaSZheng Liu 68175dabfc78STheodore Ts'o err = ext4_init_system_zone(); 6818bd2d0210STheodore Ts'o if (err) 6819b5799018STheodore Ts'o goto out4; 6820857ac889SLukas Czerner 6821b5799018STheodore Ts'o err = ext4_init_sysfs(); 6822dd68314cSTheodore Ts'o if (err) 6823b5799018STheodore Ts'o goto out3; 6824857ac889SLukas Czerner 68255dabfc78STheodore Ts'o err = ext4_init_mballoc(); 6826ac27a0ecSDave Kleikamp if (err) 6827c9de560dSAlex Tomas goto out2; 6828ac27a0ecSDave Kleikamp err = init_inodecache(); 6829ac27a0ecSDave Kleikamp if (err) 6830ac27a0ecSDave Kleikamp goto out1; 6831aa75f4d3SHarshad Shirwadkar 6832aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 6833aa75f4d3SHarshad Shirwadkar if (err) 6834aa75f4d3SHarshad Shirwadkar goto out05; 6835aa75f4d3SHarshad Shirwadkar 683624b58424STheodore Ts'o register_as_ext3(); 68372035e776STheodore Ts'o register_as_ext2(); 683803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 6839ac27a0ecSDave Kleikamp if (err) 6840ac27a0ecSDave Kleikamp goto out; 6841bfff6873SLukas Czerner 6842ac27a0ecSDave Kleikamp return 0; 6843ac27a0ecSDave Kleikamp out: 684424b58424STheodore Ts'o unregister_as_ext2(); 684524b58424STheodore Ts'o unregister_as_ext3(); 6846aa75f4d3SHarshad Shirwadkar out05: 6847ac27a0ecSDave Kleikamp destroy_inodecache(); 6848ac27a0ecSDave Kleikamp out1: 68495dabfc78STheodore Ts'o ext4_exit_mballoc(); 68509c191f70ST Makphaibulchoke out2: 6851b5799018STheodore Ts'o ext4_exit_sysfs(); 6852b5799018STheodore Ts'o out3: 6853dd68314cSTheodore Ts'o ext4_exit_system_zone(); 6854b5799018STheodore Ts'o out4: 68555dabfc78STheodore Ts'o ext4_exit_pageio(); 6856b5799018STheodore Ts'o out5: 685722cfe4b4SEric Biggers ext4_exit_post_read_processing(); 68581dc0aa46SEric Whitney out6: 685922cfe4b4SEric Biggers ext4_exit_pending(); 686022cfe4b4SEric Biggers out7: 686151865fdaSZheng Liu ext4_exit_es(); 686251865fdaSZheng Liu 6863ac27a0ecSDave Kleikamp return err; 6864ac27a0ecSDave Kleikamp } 6865ac27a0ecSDave Kleikamp 68665dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 6867ac27a0ecSDave Kleikamp { 6868bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 686924b58424STheodore Ts'o unregister_as_ext2(); 687024b58424STheodore Ts'o unregister_as_ext3(); 687103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 6872ac27a0ecSDave Kleikamp destroy_inodecache(); 68735dabfc78STheodore Ts'o ext4_exit_mballoc(); 6874b5799018STheodore Ts'o ext4_exit_sysfs(); 68755dabfc78STheodore Ts'o ext4_exit_system_zone(); 68765dabfc78STheodore Ts'o ext4_exit_pageio(); 687722cfe4b4SEric Biggers ext4_exit_post_read_processing(); 6878dd12ed14SEric Sandeen ext4_exit_es(); 68791dc0aa46SEric Whitney ext4_exit_pending(); 6880ac27a0ecSDave Kleikamp } 6881ac27a0ecSDave Kleikamp 6882ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 688383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6884ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 68857ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 68865dabfc78STheodore Ts'o module_init(ext4_init_fs) 68875dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6888