1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 43bfff6873SLukas Czerner #include <linux/kthread.h> 44bfff6873SLukas Czerner #include <linux/freezer.h> 45bfff6873SLukas Czerner 463dcf5451SChristoph Hellwig #include "ext4.h" 473dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 48ac27a0ecSDave Kleikamp #include "xattr.h" 49ac27a0ecSDave Kleikamp #include "acl.h" 503661d286STheodore Ts'o #include "mballoc.h" 51ac27a0ecSDave Kleikamp 529bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 539bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 549bffad1eSTheodore Ts'o 551f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 563197ebdbSTheodore Ts'o static struct kset *ext4_kset; 57bfff6873SLukas Czerner struct ext4_lazy_init *ext4_li_info; 58bfff6873SLukas Czerner struct mutex ext4_li_mtx; 59857ac889SLukas Czerner struct ext4_features *ext4_feat; 609f6200bbSTheodore Ts'o 61617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 62ac27a0ecSDave Kleikamp unsigned long journal_devnum); 63e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 64617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 65617ba13bSMingming Cao struct ext4_super_block *es); 66617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 69617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 70ac27a0ecSDave Kleikamp char nbuf[16]); 71617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 72617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 73c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 74617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 75c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 76152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 77152a0836SAl Viro const char *dev_name, void *data); 78bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 79bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 80ac27a0ecSDave Kleikamp 81ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 82ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 83ba69f9abSJan Kara .owner = THIS_MODULE, 84ba69f9abSJan Kara .name = "ext3", 85152a0836SAl Viro .mount = ext4_mount, 86ba69f9abSJan Kara .kill_sb = kill_block_super, 87ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 88ba69f9abSJan Kara }; 89ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 90ba69f9abSJan Kara #else 91ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 92ba69f9abSJan Kara #endif 93bd81d8eeSLaurent Vivier 948fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 958fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 96bd81d8eeSLaurent Vivier { 973a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 988fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 998fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 100bd81d8eeSLaurent Vivier } 101bd81d8eeSLaurent Vivier 1028fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1038fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 104bd81d8eeSLaurent Vivier { 1055272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1068fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1078fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 108bd81d8eeSLaurent Vivier } 109bd81d8eeSLaurent Vivier 1108fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1118fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 112bd81d8eeSLaurent Vivier { 1135272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1148fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1158fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 116bd81d8eeSLaurent Vivier } 117bd81d8eeSLaurent Vivier 118560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 119560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 120560671a0SAneesh Kumar K.V { 121560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 122560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 123560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 124560671a0SAneesh Kumar K.V } 125560671a0SAneesh Kumar K.V 126560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 127560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 128560671a0SAneesh Kumar K.V { 129560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 130560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 131560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 132560671a0SAneesh Kumar K.V } 133560671a0SAneesh Kumar K.V 134560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 135560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 136560671a0SAneesh Kumar K.V { 137560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 138560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 139560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 140560671a0SAneesh Kumar K.V } 141560671a0SAneesh Kumar K.V 142560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 143560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 144560671a0SAneesh Kumar K.V { 145560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 146560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 147560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 148560671a0SAneesh Kumar K.V } 149560671a0SAneesh Kumar K.V 1508fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1518fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 152bd81d8eeSLaurent Vivier { 1533a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1548fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1558fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 156bd81d8eeSLaurent Vivier } 157bd81d8eeSLaurent Vivier 1588fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1598fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 160bd81d8eeSLaurent Vivier { 1615272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1628fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1638fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 164bd81d8eeSLaurent Vivier } 165bd81d8eeSLaurent Vivier 1668fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1678fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 168bd81d8eeSLaurent Vivier { 1695272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1708fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1718fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 172bd81d8eeSLaurent Vivier } 173bd81d8eeSLaurent Vivier 174560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 175560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 176560671a0SAneesh Kumar K.V { 177560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 178560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 179560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 180560671a0SAneesh Kumar K.V } 181560671a0SAneesh Kumar K.V 182560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 183560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 184560671a0SAneesh Kumar K.V { 185560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 186560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 187560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 188560671a0SAneesh Kumar K.V } 189560671a0SAneesh Kumar K.V 190560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 191560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 192560671a0SAneesh Kumar K.V { 193560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 194560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 195560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 196560671a0SAneesh Kumar K.V } 197560671a0SAneesh Kumar K.V 198560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 199560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 200560671a0SAneesh Kumar K.V { 201560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 202560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 203560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 204560671a0SAneesh Kumar K.V } 205560671a0SAneesh Kumar K.V 206d3d1faf6SCurt Wohlgemuth 207d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 208d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 209d3d1faf6SCurt Wohlgemuth { 210d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 211d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 212d3d1faf6SCurt Wohlgemuth 213d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 214d3d1faf6SCurt Wohlgemuth 215d3d1faf6SCurt Wohlgemuth ref_cnt++; 216d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 217d3d1faf6SCurt Wohlgemuth 218d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 219d3d1faf6SCurt Wohlgemuth return handle; 220d3d1faf6SCurt Wohlgemuth } 221d3d1faf6SCurt Wohlgemuth 222d3d1faf6SCurt Wohlgemuth 223d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 224d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 225d3d1faf6SCurt Wohlgemuth { 226d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 227d3d1faf6SCurt Wohlgemuth 228d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 229d3d1faf6SCurt Wohlgemuth 230d3d1faf6SCurt Wohlgemuth ref_cnt--; 231d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 232d3d1faf6SCurt Wohlgemuth 233d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 234d3d1faf6SCurt Wohlgemuth } 235d3d1faf6SCurt Wohlgemuth 236ac27a0ecSDave Kleikamp /* 237dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 238ac27a0ecSDave Kleikamp * 239ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 240ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 241ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 242ac27a0ecSDave Kleikamp * appropriate. 243ac27a0ecSDave Kleikamp */ 244617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 245ac27a0ecSDave Kleikamp { 246ac27a0ecSDave Kleikamp journal_t *journal; 247ac27a0ecSDave Kleikamp 248ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 249ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 250ac27a0ecSDave Kleikamp 251437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 252ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 253ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 254ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 255617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2560390131bSFrank Mayhar if (journal) { 257ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 258c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 259ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 260ac27a0ecSDave Kleikamp } 261dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 262ac27a0ecSDave Kleikamp } 263d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2640390131bSFrank Mayhar } 265ac27a0ecSDave Kleikamp 266ac27a0ecSDave Kleikamp /* 267ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 268dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 269ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 270ac27a0ecSDave Kleikamp * appropriate. 271ac27a0ecSDave Kleikamp */ 272c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 273ac27a0ecSDave Kleikamp { 274ac27a0ecSDave Kleikamp struct super_block *sb; 275ac27a0ecSDave Kleikamp int err; 276ac27a0ecSDave Kleikamp int rc; 277ac27a0ecSDave Kleikamp 2780390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 279d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2800390131bSFrank Mayhar return 0; 2810390131bSFrank Mayhar } 282ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 283ac27a0ecSDave Kleikamp err = handle->h_err; 284dab291afSMingming Cao rc = jbd2_journal_stop(handle); 285ac27a0ecSDave Kleikamp 286ac27a0ecSDave Kleikamp if (!err) 287ac27a0ecSDave Kleikamp err = rc; 288ac27a0ecSDave Kleikamp if (err) 289c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 290ac27a0ecSDave Kleikamp return err; 291ac27a0ecSDave Kleikamp } 292ac27a0ecSDave Kleikamp 29390c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 29490c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 29590c7201bSTheodore Ts'o handle_t *handle, int err) 296ac27a0ecSDave Kleikamp { 297ac27a0ecSDave Kleikamp char nbuf[16]; 298617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 299ac27a0ecSDave Kleikamp 3000390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3010390131bSFrank Mayhar 302ac27a0ecSDave Kleikamp if (bh) 303ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 304ac27a0ecSDave Kleikamp 305ac27a0ecSDave Kleikamp if (!handle->h_err) 306ac27a0ecSDave Kleikamp handle->h_err = err; 307ac27a0ecSDave Kleikamp 308ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 309ac27a0ecSDave Kleikamp return; 310ac27a0ecSDave Kleikamp 31190c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 31290c7201bSTheodore Ts'o caller, line, errstr, err_fn); 313ac27a0ecSDave Kleikamp 314dab291afSMingming Cao jbd2_journal_abort_handle(handle); 315ac27a0ecSDave Kleikamp } 316ac27a0ecSDave Kleikamp 3171c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3181c13d5c0STheodore Ts'o unsigned int line) 3191c13d5c0STheodore Ts'o { 3201c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3211c13d5c0STheodore Ts'o 3221c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3231c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3241c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3251c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3261c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3271c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3281c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3291c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3301c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3311c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3321c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3331c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3341c13d5c0STheodore Ts'o } 33566e61a9eSTheodore Ts'o /* 33666e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33766e61a9eSTheodore Ts'o * started already 33866e61a9eSTheodore Ts'o */ 33966e61a9eSTheodore Ts'o if (!es->s_error_count) 34066e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 3411c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 3421c13d5c0STheodore Ts'o } 3431c13d5c0STheodore Ts'o 3441c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3451c13d5c0STheodore Ts'o unsigned int line) 3461c13d5c0STheodore Ts'o { 3471c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3481c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3491c13d5c0STheodore Ts'o } 3501c13d5c0STheodore Ts'o 3511c13d5c0STheodore Ts'o 352ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 353ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 354ac27a0ecSDave Kleikamp * 355ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 356617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 357ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 358ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 359ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 360ac27a0ecSDave Kleikamp * write out the superblock safely. 361ac27a0ecSDave Kleikamp * 362dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 363d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 364ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 365ac27a0ecSDave Kleikamp */ 366ac27a0ecSDave Kleikamp 367617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 368ac27a0ecSDave Kleikamp { 369ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 370ac27a0ecSDave Kleikamp return; 371ac27a0ecSDave Kleikamp 372ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 373617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 374ac27a0ecSDave Kleikamp 3754ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 376ac27a0ecSDave Kleikamp if (journal) 377dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 378ac27a0ecSDave Kleikamp } 379ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 380b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 381ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 382ac27a0ecSDave Kleikamp } 383ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 384617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 385ac27a0ecSDave Kleikamp sb->s_id); 386ac27a0ecSDave Kleikamp } 387ac27a0ecSDave Kleikamp 38812062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 389c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 390ac27a0ecSDave Kleikamp { 391ac27a0ecSDave Kleikamp va_list args; 392ac27a0ecSDave Kleikamp 393ac27a0ecSDave Kleikamp va_start(args, fmt); 394c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ", 395c398eda0STheodore Ts'o sb->s_id, function, line, current->comm); 396ac27a0ecSDave Kleikamp vprintk(fmt, args); 397ac27a0ecSDave Kleikamp printk("\n"); 398ac27a0ecSDave Kleikamp va_end(args); 399ac27a0ecSDave Kleikamp 400617ba13bSMingming Cao ext4_handle_error(sb); 401ac27a0ecSDave Kleikamp } 402ac27a0ecSDave Kleikamp 403c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 404c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 405273df556SFrank Mayhar const char *fmt, ...) 406273df556SFrank Mayhar { 407273df556SFrank Mayhar va_list args; 4081c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 409273df556SFrank Mayhar 4101c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4111c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4121c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 413273df556SFrank Mayhar va_start(args, fmt); 414c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 415c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 416c398eda0STheodore Ts'o if (block) 417c398eda0STheodore Ts'o printk("block %llu: ", block); 418c398eda0STheodore Ts'o printk("comm %s: ", current->comm); 419273df556SFrank Mayhar vprintk(fmt, args); 420273df556SFrank Mayhar printk("\n"); 421273df556SFrank Mayhar va_end(args); 422273df556SFrank Mayhar 423273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 424273df556SFrank Mayhar } 425273df556SFrank Mayhar 426c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 427c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 428273df556SFrank Mayhar { 429273df556SFrank Mayhar va_list args; 4301c13d5c0STheodore Ts'o struct ext4_super_block *es; 431273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 432273df556SFrank Mayhar char pathname[80], *path; 433273df556SFrank Mayhar 4341c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4351c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4361c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 437273df556SFrank Mayhar va_start(args, fmt); 438273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 439273df556SFrank Mayhar if (!path) 440273df556SFrank Mayhar path = "(unknown)"; 441273df556SFrank Mayhar printk(KERN_CRIT 442c398eda0STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu " 443c398eda0STheodore Ts'o "(comm %s path %s): ", 444c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino, 445c398eda0STheodore Ts'o current->comm, path); 446273df556SFrank Mayhar vprintk(fmt, args); 447273df556SFrank Mayhar printk("\n"); 448273df556SFrank Mayhar va_end(args); 449273df556SFrank Mayhar 450273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 451273df556SFrank Mayhar } 452273df556SFrank Mayhar 453617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 454ac27a0ecSDave Kleikamp char nbuf[16]) 455ac27a0ecSDave Kleikamp { 456ac27a0ecSDave Kleikamp char *errstr = NULL; 457ac27a0ecSDave Kleikamp 458ac27a0ecSDave Kleikamp switch (errno) { 459ac27a0ecSDave Kleikamp case -EIO: 460ac27a0ecSDave Kleikamp errstr = "IO failure"; 461ac27a0ecSDave Kleikamp break; 462ac27a0ecSDave Kleikamp case -ENOMEM: 463ac27a0ecSDave Kleikamp errstr = "Out of memory"; 464ac27a0ecSDave Kleikamp break; 465ac27a0ecSDave Kleikamp case -EROFS: 46678f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 46778f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 468ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 469ac27a0ecSDave Kleikamp else 470ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 471ac27a0ecSDave Kleikamp break; 472ac27a0ecSDave Kleikamp default: 473ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 474ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 475ac27a0ecSDave Kleikamp * NULL. */ 476ac27a0ecSDave Kleikamp if (nbuf) { 477ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 478ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 479ac27a0ecSDave Kleikamp errstr = nbuf; 480ac27a0ecSDave Kleikamp } 481ac27a0ecSDave Kleikamp break; 482ac27a0ecSDave Kleikamp } 483ac27a0ecSDave Kleikamp 484ac27a0ecSDave Kleikamp return errstr; 485ac27a0ecSDave Kleikamp } 486ac27a0ecSDave Kleikamp 487617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 488ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 489ac27a0ecSDave Kleikamp 490c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 491c398eda0STheodore Ts'o unsigned int line, int errno) 492ac27a0ecSDave Kleikamp { 493ac27a0ecSDave Kleikamp char nbuf[16]; 494ac27a0ecSDave Kleikamp const char *errstr; 495ac27a0ecSDave Kleikamp 496ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 497ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 498ac27a0ecSDave Kleikamp * an error. */ 499ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 500ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 501ac27a0ecSDave Kleikamp return; 502ac27a0ecSDave Kleikamp 503617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 504c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 505c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5061c13d5c0STheodore Ts'o save_error_info(sb, function, line); 507ac27a0ecSDave Kleikamp 508617ba13bSMingming Cao ext4_handle_error(sb); 509ac27a0ecSDave Kleikamp } 510ac27a0ecSDave Kleikamp 511ac27a0ecSDave Kleikamp /* 512617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 513ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 514ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 515ac27a0ecSDave Kleikamp * 516ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 517ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 518ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 519ac27a0ecSDave Kleikamp */ 520ac27a0ecSDave Kleikamp 521c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 522c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 523ac27a0ecSDave Kleikamp { 524ac27a0ecSDave Kleikamp va_list args; 525ac27a0ecSDave Kleikamp 5261c13d5c0STheodore Ts'o save_error_info(sb, function, line); 527ac27a0ecSDave Kleikamp va_start(args, fmt); 528c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 529c398eda0STheodore Ts'o function, line); 530ac27a0ecSDave Kleikamp vprintk(fmt, args); 531ac27a0ecSDave Kleikamp printk("\n"); 532ac27a0ecSDave Kleikamp va_end(args); 533ac27a0ecSDave Kleikamp 5341c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 535b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 536ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5374ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 538ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 539dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5401c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5411c13d5c0STheodore Ts'o } 5421c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5431c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 544ac27a0ecSDave Kleikamp } 545ac27a0ecSDave Kleikamp 546b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 547b31e1552SEric Sandeen const char *fmt, ...) 548b31e1552SEric Sandeen { 549b31e1552SEric Sandeen va_list args; 550b31e1552SEric Sandeen 551b31e1552SEric Sandeen va_start(args, fmt); 552b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 553b31e1552SEric Sandeen vprintk(fmt, args); 554b31e1552SEric Sandeen printk("\n"); 555b31e1552SEric Sandeen va_end(args); 556b31e1552SEric Sandeen } 557b31e1552SEric Sandeen 55812062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 559c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 560ac27a0ecSDave Kleikamp { 561ac27a0ecSDave Kleikamp va_list args; 562ac27a0ecSDave Kleikamp 563ac27a0ecSDave Kleikamp va_start(args, fmt); 564c398eda0STheodore Ts'o printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ", 565c398eda0STheodore Ts'o sb->s_id, function, line); 566ac27a0ecSDave Kleikamp vprintk(fmt, args); 567ac27a0ecSDave Kleikamp printk("\n"); 568ac27a0ecSDave Kleikamp va_end(args); 569ac27a0ecSDave Kleikamp } 570ac27a0ecSDave Kleikamp 571e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 572e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 573e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 574e29136f8STheodore Ts'o const char *fmt, ...) 5755d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5765d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5775d1b1b3fSAneesh Kumar K.V { 5785d1b1b3fSAneesh Kumar K.V va_list args; 5795d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5805d1b1b3fSAneesh Kumar K.V 5811c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 5821c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5831c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 5845d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 585e29136f8STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", 586e29136f8STheodore Ts'o sb->s_id, function, line, grp); 587e29136f8STheodore Ts'o if (ino) 588e29136f8STheodore Ts'o printk("inode %lu: ", ino); 589e29136f8STheodore Ts'o if (block) 590e29136f8STheodore Ts'o printk("block %llu:", (unsigned long long) block); 5915d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 5925d1b1b3fSAneesh Kumar K.V printk("\n"); 5935d1b1b3fSAneesh Kumar K.V va_end(args); 5945d1b1b3fSAneesh Kumar K.V 5955d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 596e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 5975d1b1b3fSAneesh Kumar K.V return; 5985d1b1b3fSAneesh Kumar K.V } 5991c13d5c0STheodore Ts'o 6005d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6015d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6025d1b1b3fSAneesh Kumar K.V /* 6035d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6045d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6055d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6065d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6075d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 6085d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 6095d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6105d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6115d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6125d1b1b3fSAneesh Kumar K.V */ 6135d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6145d1b1b3fSAneesh Kumar K.V return; 6155d1b1b3fSAneesh Kumar K.V } 6165d1b1b3fSAneesh Kumar K.V 617617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 618ac27a0ecSDave Kleikamp { 619617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 620ac27a0ecSDave Kleikamp 621617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 622ac27a0ecSDave Kleikamp return; 623ac27a0ecSDave Kleikamp 62412062dddSEric Sandeen ext4_warning(sb, 625ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 626ac27a0ecSDave Kleikamp "running e2fsck is recommended", 627617ba13bSMingming Cao EXT4_DYNAMIC_REV); 628ac27a0ecSDave Kleikamp 629617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 630617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 631617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 632ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 633ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 634ac27a0ecSDave Kleikamp 635ac27a0ecSDave Kleikamp /* 636ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 637ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 638ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 639ac27a0ecSDave Kleikamp */ 640ac27a0ecSDave Kleikamp } 641ac27a0ecSDave Kleikamp 642ac27a0ecSDave Kleikamp /* 643ac27a0ecSDave Kleikamp * Open the external journal device 644ac27a0ecSDave Kleikamp */ 645b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 646ac27a0ecSDave Kleikamp { 647ac27a0ecSDave Kleikamp struct block_device *bdev; 648ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 649ac27a0ecSDave Kleikamp 650ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 651ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 652ac27a0ecSDave Kleikamp goto fail; 653ac27a0ecSDave Kleikamp return bdev; 654ac27a0ecSDave Kleikamp 655ac27a0ecSDave Kleikamp fail: 656b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 657ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 658ac27a0ecSDave Kleikamp return NULL; 659ac27a0ecSDave Kleikamp } 660ac27a0ecSDave Kleikamp 661ac27a0ecSDave Kleikamp /* 662ac27a0ecSDave Kleikamp * Release the journal device 663ac27a0ecSDave Kleikamp */ 664617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 665ac27a0ecSDave Kleikamp { 666ac27a0ecSDave Kleikamp bd_release(bdev); 6679a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 668ac27a0ecSDave Kleikamp } 669ac27a0ecSDave Kleikamp 670617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 671ac27a0ecSDave Kleikamp { 672ac27a0ecSDave Kleikamp struct block_device *bdev; 673ac27a0ecSDave Kleikamp int ret = -ENODEV; 674ac27a0ecSDave Kleikamp 675ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 676ac27a0ecSDave Kleikamp if (bdev) { 677617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 678ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 679ac27a0ecSDave Kleikamp } 680ac27a0ecSDave Kleikamp return ret; 681ac27a0ecSDave Kleikamp } 682ac27a0ecSDave Kleikamp 683ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 684ac27a0ecSDave Kleikamp { 685617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 686ac27a0ecSDave Kleikamp } 687ac27a0ecSDave Kleikamp 688617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 689ac27a0ecSDave Kleikamp { 690ac27a0ecSDave Kleikamp struct list_head *l; 691ac27a0ecSDave Kleikamp 692b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 693ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 694ac27a0ecSDave Kleikamp 695ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 696ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 697ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 698ac27a0ecSDave Kleikamp printk(KERN_ERR " " 699ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 700ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 701ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 702ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 703ac27a0ecSDave Kleikamp } 704ac27a0ecSDave Kleikamp } 705ac27a0ecSDave Kleikamp 706617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 707ac27a0ecSDave Kleikamp { 708617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 709617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 710ef2cabf7SHidehiro Kawai int i, err; 711ac27a0ecSDave Kleikamp 712857ac889SLukas Czerner ext4_unregister_li_request(sb); 713e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 714e0ccfd95SChristoph Hellwig 7154c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7164c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7174c0425ffSMingming Cao 718a9e220f8SAl Viro lock_super(sb); 7198c85e125SChristoph Hellwig if (sb->s_dirt) 720ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 7218c85e125SChristoph Hellwig 7220390131bSFrank Mayhar if (sbi->s_journal) { 723ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 72447b4a50bSJan Kara sbi->s_journal = NULL; 725ef2cabf7SHidehiro Kawai if (err < 0) 726c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7270390131bSFrank Mayhar } 728d4edac31SJosef Bacik 729a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 730d4edac31SJosef Bacik ext4_release_system_zone(sb); 731d4edac31SJosef Bacik ext4_mb_release(sb); 732d4edac31SJosef Bacik ext4_ext_release(sb); 733d4edac31SJosef Bacik ext4_xattr_put_super(sb); 734d4edac31SJosef Bacik 735ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 736617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 737ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 738e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 739ac27a0ecSDave Kleikamp } 740240799cdSTheodore Ts'o if (sbi->s_proc) { 7419f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 742240799cdSTheodore Ts'o } 7433197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 744ac27a0ecSDave Kleikamp 745ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 746ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 747ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 748c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 749c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 750c5ca7c76STheodore Ts'o else 751772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 752ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 753ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 754ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 7556bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 756ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 757ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 758ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 759ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 760ac27a0ecSDave Kleikamp #endif 761ac27a0ecSDave Kleikamp 762ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 763ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 764ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 765ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 766ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 767ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 768ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 769ac27a0ecSDave Kleikamp 770f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 771ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 772ac27a0ecSDave Kleikamp /* 773ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 774ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 775ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 776ac27a0ecSDave Kleikamp */ 777ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 778f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 779617ba13bSMingming Cao ext4_blkdev_remove(sbi); 780ac27a0ecSDave Kleikamp } 781ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7823197ebdbSTheodore Ts'o /* 7833197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7843197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7853197ebdbSTheodore Ts'o */ 7863197ebdbSTheodore Ts'o unlock_super(sb); 7873197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7883197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 789705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 790ac27a0ecSDave Kleikamp kfree(sbi); 791ac27a0ecSDave Kleikamp } 792ac27a0ecSDave Kleikamp 793e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 794ac27a0ecSDave Kleikamp 795ac27a0ecSDave Kleikamp /* 796ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 797ac27a0ecSDave Kleikamp */ 798617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 799ac27a0ecSDave Kleikamp { 800617ba13bSMingming Cao struct ext4_inode_info *ei; 801ac27a0ecSDave Kleikamp 802e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 803ac27a0ecSDave Kleikamp if (!ei) 804ac27a0ecSDave Kleikamp return NULL; 8050b8e58a1SAndreas Dilger 806ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 80791246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 808a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 809c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 810c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8110390131bSFrank Mayhar /* 8120390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 8130390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 8140390131bSFrank Mayhar * jinode. 8150390131bSFrank Mayhar */ 816678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 817d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 818d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 819d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8209d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 821d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 822d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 823a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 824a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 825a9e7f447SDmitry Monakhov #endif 826c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 827744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 8288d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 829b436b9beSJan Kara ei->i_sync_tid = 0; 830b436b9beSJan Kara ei->i_datasync_tid = 0; 831f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 8320b8e58a1SAndreas Dilger 833ac27a0ecSDave Kleikamp return &ei->vfs_inode; 834ac27a0ecSDave Kleikamp } 835ac27a0ecSDave Kleikamp 8367ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 8377ff9c073STheodore Ts'o { 8387ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 8397ff9c073STheodore Ts'o 8407ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 8417ff9c073STheodore Ts'o return drop; 8427ff9c073STheodore Ts'o } 8437ff9c073STheodore Ts'o 844617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 845ac27a0ecSDave Kleikamp { 846f7ad6d2eSTheodore Ts'o ext4_ioend_wait(inode); 8479f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 848b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 849b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 850b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 8519f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 8529f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 8539f7dd93dSVasily Averin true); 8549f7dd93dSVasily Averin dump_stack(); 8559f7dd93dSVasily Averin } 856617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 857ac27a0ecSDave Kleikamp } 858ac27a0ecSDave Kleikamp 85951cc5068SAlexey Dobriyan static void init_once(void *foo) 860ac27a0ecSDave Kleikamp { 861617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 862ac27a0ecSDave Kleikamp 863ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 86403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 865ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 866ac27a0ecSDave Kleikamp #endif 8670e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 868ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 869ac27a0ecSDave Kleikamp } 870ac27a0ecSDave Kleikamp 871ac27a0ecSDave Kleikamp static int init_inodecache(void) 872ac27a0ecSDave Kleikamp { 873617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 874617ba13bSMingming Cao sizeof(struct ext4_inode_info), 875ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 876ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 87720c2df83SPaul Mundt init_once); 878617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 879ac27a0ecSDave Kleikamp return -ENOMEM; 880ac27a0ecSDave Kleikamp return 0; 881ac27a0ecSDave Kleikamp } 882ac27a0ecSDave Kleikamp 883ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 884ac27a0ecSDave Kleikamp { 885617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 886ac27a0ecSDave Kleikamp } 887ac27a0ecSDave Kleikamp 8880930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 889ac27a0ecSDave Kleikamp { 8900930fcc1SAl Viro invalidate_inode_buffers(inode); 8910930fcc1SAl Viro end_writeback(inode); 8929f754758SChristoph Hellwig dquot_drop(inode); 893c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 8940390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 895678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 896678aaf48SJan Kara &EXT4_I(inode)->jinode); 897ac27a0ecSDave Kleikamp } 898ac27a0ecSDave Kleikamp 8992b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 9002b2d6d01STheodore Ts'o struct super_block *sb) 901ac27a0ecSDave Kleikamp { 902ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 903617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 904ac27a0ecSDave Kleikamp 9055a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 9065a20bdfcSJan Kara char *fmtname = ""; 9075a20bdfcSJan Kara 9085a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 9095a20bdfcSJan Kara case QFMT_VFS_OLD: 9105a20bdfcSJan Kara fmtname = "vfsold"; 9115a20bdfcSJan Kara break; 9125a20bdfcSJan Kara case QFMT_VFS_V0: 9135a20bdfcSJan Kara fmtname = "vfsv0"; 9145a20bdfcSJan Kara break; 9155a20bdfcSJan Kara case QFMT_VFS_V1: 9165a20bdfcSJan Kara fmtname = "vfsv1"; 9175a20bdfcSJan Kara break; 9185a20bdfcSJan Kara } 9195a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 9205a20bdfcSJan Kara } 921ac27a0ecSDave Kleikamp 922ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 923ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 924ac27a0ecSDave Kleikamp 925ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 926ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 927ac27a0ecSDave Kleikamp 928482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 929ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 930ac27a0ecSDave Kleikamp 931482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 932ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 933ac27a0ecSDave Kleikamp #endif 934ac27a0ecSDave Kleikamp } 935ac27a0ecSDave Kleikamp 936d9c9bef1SMiklos Szeredi /* 937d9c9bef1SMiklos Szeredi * Show an option if 938d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 939d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 940d9c9bef1SMiklos Szeredi */ 941617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 942ac27a0ecSDave Kleikamp { 943aa22df2cSAneesh Kumar K.V int def_errors; 944aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 945ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 946d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 947d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 948d9c9bef1SMiklos Szeredi 949d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 950aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 951d9c9bef1SMiklos Szeredi 952d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 953d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 954d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 955d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 956aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 957d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 958d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 959d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 960d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 961d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 962d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 963d9c9bef1SMiklos Szeredi } 964d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 965d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 966d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 967d9c9bef1SMiklos Szeredi } 968bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 969d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 970bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 971d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 972bb4f397aSAneesh Kumar K.V } 973bb4f397aSAneesh Kumar K.V } 974aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 975bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 976aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 977d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 978aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 979d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 980aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 981d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 982d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 983d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 98403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 985aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 986aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 987d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 988d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 989d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 990d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 991d9c9bef1SMiklos Szeredi } 992d9c9bef1SMiklos Szeredi #endif 99303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 994aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 995d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 996d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 997d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 998d9c9bef1SMiklos Szeredi #endif 99930773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 1000d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 1001d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 1002d9c9bef1SMiklos Szeredi } 100330773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 100430773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 100530773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 100630773840STheodore Ts'o } 100730773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 100830773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 100930773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 101030773840STheodore Ts'o } 101130773840STheodore Ts'o 1012571640caSEric Sandeen /* 1013571640caSEric Sandeen * We're changing the default of barrier mount option, so 1014571640caSEric Sandeen * let's always display its mount state so it's clear what its 1015571640caSEric Sandeen * status is. 1016571640caSEric Sandeen */ 1017571640caSEric Sandeen seq_puts(seq, ",barrier="); 1018571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1019cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1020cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 102139a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 102239a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 102325ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 102425ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 10258b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 10268b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1027dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1028dd919b98SAneesh Kumar K.V 10291449032bSTheodore Ts'o if (test_opt(sb, MBLK_IO_SUBMIT)) 10301449032bSTheodore Ts'o seq_puts(seq, ",mblk_io_submit"); 1031cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1032cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1033aa22df2cSAneesh Kumar K.V /* 1034aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1035aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1036aa22df2cSAneesh Kumar K.V */ 1037617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1038ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1039617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1040ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1041617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1042ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1043ac27a0ecSDave Kleikamp 1044240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1045240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1046240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1047240799cdSTheodore Ts'o 10485bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 10495bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 10505bf5683aSHidehiro Kawai 1051afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 105206705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1053afd4672dSTheodore Ts'o 10548b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 10555328e635SEric Sandeen seq_puts(seq, ",discard"); 10565328e635SEric Sandeen 1057e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1058e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1059e3bb52aeSEric Sandeen 1060744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1061744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1062744692dcSJiaying Zhang 10638b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 10648b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 10658b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 10668b67f04aSTheodore Ts'o 1067bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1068bfff6873SLukas Czerner seq_puts(seq, ",noinit_inode_table"); 1069bfff6873SLukas Czerner else if (sbi->s_li_wait_mult) 1070bfff6873SLukas Czerner seq_printf(seq, ",init_inode_table=%u", 1071bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1072bfff6873SLukas Czerner 1073617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 10740b8e58a1SAndreas Dilger 1075ac27a0ecSDave Kleikamp return 0; 1076ac27a0ecSDave Kleikamp } 1077ac27a0ecSDave Kleikamp 10781b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10791b961ac0SChristoph Hellwig u64 ino, u32 generation) 1080ac27a0ecSDave Kleikamp { 1081ac27a0ecSDave Kleikamp struct inode *inode; 1082ac27a0ecSDave Kleikamp 1083617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1084ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1085617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1086ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1087ac27a0ecSDave Kleikamp 1088ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1089ac27a0ecSDave Kleikamp * 1090617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1091ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1092ac27a0ecSDave Kleikamp * 1093ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1094ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1095ac27a0ecSDave Kleikamp */ 10961d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10971d1fe1eeSDavid Howells if (IS_ERR(inode)) 10981d1fe1eeSDavid Howells return ERR_CAST(inode); 10991d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1100ac27a0ecSDave Kleikamp iput(inode); 1101ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1102ac27a0ecSDave Kleikamp } 11031b961ac0SChristoph Hellwig 11041b961ac0SChristoph Hellwig return inode; 1105ac27a0ecSDave Kleikamp } 11061b961ac0SChristoph Hellwig 11071b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11081b961ac0SChristoph Hellwig int fh_len, int fh_type) 11091b961ac0SChristoph Hellwig { 11101b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11111b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11121b961ac0SChristoph Hellwig } 11131b961ac0SChristoph Hellwig 11141b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11151b961ac0SChristoph Hellwig int fh_len, int fh_type) 11161b961ac0SChristoph Hellwig { 11171b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11181b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1119ac27a0ecSDave Kleikamp } 1120ac27a0ecSDave Kleikamp 1121c39a7f84SToshiyuki Okajima /* 1122c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1123c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1124c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1125c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1126c39a7f84SToshiyuki Okajima */ 11270b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11280b8e58a1SAndreas Dilger gfp_t wait) 1129c39a7f84SToshiyuki Okajima { 1130c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1131c39a7f84SToshiyuki Okajima 1132c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1133c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1134c39a7f84SToshiyuki Okajima return 0; 1135c39a7f84SToshiyuki Okajima if (journal) 1136c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1137c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1138c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1139c39a7f84SToshiyuki Okajima } 1140c39a7f84SToshiyuki Okajima 1141ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1142ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1143ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1144ac27a0ecSDave Kleikamp 1145617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1146617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1147617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1148617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1149617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11506f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1151307ae18aSChristoph Hellwig char *path); 1152ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1153617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1154617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1155ac27a0ecSDave Kleikamp size_t len, loff_t off); 1156617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1157ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1158ac27a0ecSDave Kleikamp 115961e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1160a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 116160e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1162a9e7f447SDmitry Monakhov #endif 1163617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1164617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1165617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1166617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1167a5b5ee32SJan Kara .write_info = ext4_write_info, 1168a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1169a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1170ac27a0ecSDave Kleikamp }; 1171ac27a0ecSDave Kleikamp 11720d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1173617ba13bSMingming Cao .quota_on = ext4_quota_on, 1174ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1175287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1176287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1177287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1178287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1179287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1180ac27a0ecSDave Kleikamp }; 1181ac27a0ecSDave Kleikamp #endif 1182ac27a0ecSDave Kleikamp 1183ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1184617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1185617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1186617ba13bSMingming Cao .write_inode = ext4_write_inode, 1187617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11887ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11890930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1190617ba13bSMingming Cao .put_super = ext4_put_super, 1191617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1192c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1193c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1194617ba13bSMingming Cao .statfs = ext4_statfs, 1195617ba13bSMingming Cao .remount_fs = ext4_remount, 1196617ba13bSMingming Cao .show_options = ext4_show_options, 1197ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1198617ba13bSMingming Cao .quota_read = ext4_quota_read, 1199617ba13bSMingming Cao .quota_write = ext4_quota_write, 1200ac27a0ecSDave Kleikamp #endif 1201c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1202ac27a0ecSDave Kleikamp }; 1203ac27a0ecSDave Kleikamp 12049ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 12059ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 12069ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 12079ca92389STheodore Ts'o .write_inode = ext4_write_inode, 12089ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 12097ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12100930fcc1SAl Viro .evict_inode = ext4_evict_inode, 12119ca92389STheodore Ts'o .write_super = ext4_write_super, 12129ca92389STheodore Ts'o .put_super = ext4_put_super, 12139ca92389STheodore Ts'o .statfs = ext4_statfs, 12149ca92389STheodore Ts'o .remount_fs = ext4_remount, 12159ca92389STheodore Ts'o .show_options = ext4_show_options, 12169ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12179ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12189ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12199ca92389STheodore Ts'o #endif 12209ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12219ca92389STheodore Ts'o }; 12229ca92389STheodore Ts'o 122339655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12241b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12251b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1226617ba13bSMingming Cao .get_parent = ext4_get_parent, 1227ac27a0ecSDave Kleikamp }; 1228ac27a0ecSDave Kleikamp 1229ac27a0ecSDave Kleikamp enum { 1230ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1231ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 123201436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1233ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 123406705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 123530773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1236c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1237818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1238ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1239296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1240ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12415a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 12425a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 12435a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 12441449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12451449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12465328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1247744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 12485328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1249bfff6873SLukas Czerner Opt_init_inode_table, Opt_noinit_inode_table, 1250ac27a0ecSDave Kleikamp }; 1251ac27a0ecSDave Kleikamp 1252a447c093SSteven Whitehouse static const match_table_t tokens = { 1253ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1254ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1255ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1256ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1257ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1258ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1259ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1260ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1261ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1262ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1263ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1264ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1265ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1266ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1267ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1268ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1269ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1270ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1271ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1272ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1273ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1274e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1275ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1276ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1277ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 127830773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 127930773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1280ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1281ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1282818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1283818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1284ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1285ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1286ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1287ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12885bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12895bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1290ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1291ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1292ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1293ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1294ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1295ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12965a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1297ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1298ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1299ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1300ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1301ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 130206705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 130306705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 130425ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1305c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1306ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 130764769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1308dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 13091449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 13101449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 13116fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13126fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1313240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1314b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1315afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 131606705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 131706705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1318744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1319744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13205328e635SEric Sandeen {Opt_discard, "discard"}, 13215328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1322bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable=%u"}, 1323bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable"}, 1324bfff6873SLukas Czerner {Opt_noinit_inode_table, "noinit_itable"}, 1325f3f12faaSJosef Bacik {Opt_err, NULL}, 1326ac27a0ecSDave Kleikamp }; 1327ac27a0ecSDave Kleikamp 1328617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1329ac27a0ecSDave Kleikamp { 1330617ba13bSMingming Cao ext4_fsblk_t sb_block; 1331ac27a0ecSDave Kleikamp char *options = (char *) *data; 1332ac27a0ecSDave Kleikamp 1333ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1334ac27a0ecSDave Kleikamp return 1; /* Default location */ 13350b8e58a1SAndreas Dilger 1336ac27a0ecSDave Kleikamp options += 3; 13370b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1338ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1339ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13404776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1341ac27a0ecSDave Kleikamp (char *) *data); 1342ac27a0ecSDave Kleikamp return 1; 1343ac27a0ecSDave Kleikamp } 1344ac27a0ecSDave Kleikamp if (*options == ',') 1345ac27a0ecSDave Kleikamp options++; 1346ac27a0ecSDave Kleikamp *data = (void *) options; 13470b8e58a1SAndreas Dilger 1348ac27a0ecSDave Kleikamp return sb_block; 1349ac27a0ecSDave Kleikamp } 1350ac27a0ecSDave Kleikamp 1351b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1352437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1353437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1354b3881f74STheodore Ts'o 135556c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 135656c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 135756c50f11SDmitry Monakhov { 135856c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 135956c50f11SDmitry Monakhov char *qname; 136056c50f11SDmitry Monakhov 136156c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 136256c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 136356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 136456c50f11SDmitry Monakhov "Cannot change journaled " 136556c50f11SDmitry Monakhov "quota options when quota turned on"); 136656c50f11SDmitry Monakhov return 0; 136756c50f11SDmitry Monakhov } 136856c50f11SDmitry Monakhov qname = match_strdup(args); 136956c50f11SDmitry Monakhov if (!qname) { 137056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137156c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 137256c50f11SDmitry Monakhov return 0; 137356c50f11SDmitry Monakhov } 137456c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 137556c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 137656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137756c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 137856c50f11SDmitry Monakhov kfree(qname); 137956c50f11SDmitry Monakhov return 0; 138056c50f11SDmitry Monakhov } 138156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 138256c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 138356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 138456c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 138556c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 138656c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 138756c50f11SDmitry Monakhov return 0; 138856c50f11SDmitry Monakhov } 1389fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 139056c50f11SDmitry Monakhov return 1; 139156c50f11SDmitry Monakhov } 139256c50f11SDmitry Monakhov 139356c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 139456c50f11SDmitry Monakhov { 139556c50f11SDmitry Monakhov 139656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 139756c50f11SDmitry Monakhov 139856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 139956c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 140056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 140156c50f11SDmitry Monakhov " when quota turned on"); 140256c50f11SDmitry Monakhov return 0; 140356c50f11SDmitry Monakhov } 140456c50f11SDmitry Monakhov /* 140556c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 140656c50f11SDmitry Monakhov * to be correct 140756c50f11SDmitry Monakhov */ 140856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 140956c50f11SDmitry Monakhov return 1; 141056c50f11SDmitry Monakhov } 141156c50f11SDmitry Monakhov #endif 141256c50f11SDmitry Monakhov 1413ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1414c3191067STheodore Ts'o unsigned long *journal_devnum, 1415b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1416617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1417ac27a0ecSDave Kleikamp { 1418617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1419ac27a0ecSDave Kleikamp char *p; 1420ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1421ac27a0ecSDave Kleikamp int data_opt = 0; 1422ac27a0ecSDave Kleikamp int option; 1423ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 142456c50f11SDmitry Monakhov int qfmt; 1425ac27a0ecSDave Kleikamp #endif 1426ac27a0ecSDave Kleikamp 1427ac27a0ecSDave Kleikamp if (!options) 1428ac27a0ecSDave Kleikamp return 1; 1429ac27a0ecSDave Kleikamp 1430ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1431ac27a0ecSDave Kleikamp int token; 1432ac27a0ecSDave Kleikamp if (!*p) 1433ac27a0ecSDave Kleikamp continue; 1434ac27a0ecSDave Kleikamp 143515121c18SEric Sandeen /* 143615121c18SEric Sandeen * Initialize args struct so we know whether arg was 143715121c18SEric Sandeen * found; some options take optional arguments. 143815121c18SEric Sandeen */ 143915121c18SEric Sandeen args[0].to = args[0].from = 0; 1440ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1441ac27a0ecSDave Kleikamp switch (token) { 1442ac27a0ecSDave Kleikamp case Opt_bsd_df: 1443437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1444fd8c37ecSTheodore Ts'o clear_opt(sb, MINIX_DF); 1445ac27a0ecSDave Kleikamp break; 1446ac27a0ecSDave Kleikamp case Opt_minix_df: 1447437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1448fd8c37ecSTheodore Ts'o set_opt(sb, MINIX_DF); 1449437ca0fdSDmitry Monakhov 1450ac27a0ecSDave Kleikamp break; 1451ac27a0ecSDave Kleikamp case Opt_grpid: 1452437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1453fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 1454437ca0fdSDmitry Monakhov 1455ac27a0ecSDave Kleikamp break; 1456ac27a0ecSDave Kleikamp case Opt_nogrpid: 1457437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1458fd8c37ecSTheodore Ts'o clear_opt(sb, GRPID); 1459437ca0fdSDmitry Monakhov 1460ac27a0ecSDave Kleikamp break; 1461ac27a0ecSDave Kleikamp case Opt_resuid: 1462ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1463ac27a0ecSDave Kleikamp return 0; 1464ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1465ac27a0ecSDave Kleikamp break; 1466ac27a0ecSDave Kleikamp case Opt_resgid: 1467ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1468ac27a0ecSDave Kleikamp return 0; 1469ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1470ac27a0ecSDave Kleikamp break; 1471ac27a0ecSDave Kleikamp case Opt_sb: 1472ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1473ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1474ac27a0ecSDave Kleikamp break; 1475ac27a0ecSDave Kleikamp case Opt_err_panic: 1476fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1477fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1478fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 1479ac27a0ecSDave Kleikamp break; 1480ac27a0ecSDave Kleikamp case Opt_err_ro: 1481fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1482fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1483fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 1484ac27a0ecSDave Kleikamp break; 1485ac27a0ecSDave Kleikamp case Opt_err_cont: 1486fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1487fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1488fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 1489ac27a0ecSDave Kleikamp break; 1490ac27a0ecSDave Kleikamp case Opt_nouid32: 1491fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 1492ac27a0ecSDave Kleikamp break; 1493ac27a0ecSDave Kleikamp case Opt_debug: 1494fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 1495ac27a0ecSDave Kleikamp break; 1496ac27a0ecSDave Kleikamp case Opt_oldalloc: 1497fd8c37ecSTheodore Ts'o set_opt(sb, OLDALLOC); 1498ac27a0ecSDave Kleikamp break; 1499ac27a0ecSDave Kleikamp case Opt_orlov: 1500fd8c37ecSTheodore Ts'o clear_opt(sb, OLDALLOC); 1501ac27a0ecSDave Kleikamp break; 150203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1503ac27a0ecSDave Kleikamp case Opt_user_xattr: 1504fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 1505ac27a0ecSDave Kleikamp break; 1506ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1507fd8c37ecSTheodore Ts'o clear_opt(sb, XATTR_USER); 1508ac27a0ecSDave Kleikamp break; 1509ac27a0ecSDave Kleikamp #else 1510ac27a0ecSDave Kleikamp case Opt_user_xattr: 1511ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1512b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1513ac27a0ecSDave Kleikamp break; 1514ac27a0ecSDave Kleikamp #endif 151503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1516ac27a0ecSDave Kleikamp case Opt_acl: 1517fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 1518ac27a0ecSDave Kleikamp break; 1519ac27a0ecSDave Kleikamp case Opt_noacl: 1520fd8c37ecSTheodore Ts'o clear_opt(sb, POSIX_ACL); 1521ac27a0ecSDave Kleikamp break; 1522ac27a0ecSDave Kleikamp #else 1523ac27a0ecSDave Kleikamp case Opt_acl: 1524ac27a0ecSDave Kleikamp case Opt_noacl: 1525b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1526ac27a0ecSDave Kleikamp break; 1527ac27a0ecSDave Kleikamp #endif 1528ac27a0ecSDave Kleikamp case Opt_journal_update: 1529ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1530ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1531ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1532ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1533ac27a0ecSDave Kleikamp journal file. */ 1534ac27a0ecSDave Kleikamp if (is_remount) { 1535b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1536b31e1552SEric Sandeen "Cannot specify journal on remount"); 1537ac27a0ecSDave Kleikamp return 0; 1538ac27a0ecSDave Kleikamp } 1539fd8c37ecSTheodore Ts'o set_opt(sb, UPDATE_JOURNAL); 1540ac27a0ecSDave Kleikamp break; 1541ac27a0ecSDave Kleikamp case Opt_journal_dev: 1542ac27a0ecSDave Kleikamp if (is_remount) { 1543b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1544b31e1552SEric Sandeen "Cannot specify journal on remount"); 1545ac27a0ecSDave Kleikamp return 0; 1546ac27a0ecSDave Kleikamp } 1547ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1548ac27a0ecSDave Kleikamp return 0; 1549ac27a0ecSDave Kleikamp *journal_devnum = option; 1550ac27a0ecSDave Kleikamp break; 1551818d276cSGirish Shilamkar case Opt_journal_checksum: 1552fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1553d4da6c9cSLinus Torvalds break; 1554818d276cSGirish Shilamkar case Opt_journal_async_commit: 1555fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_ASYNC_COMMIT); 1556fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1557818d276cSGirish Shilamkar break; 1558ac27a0ecSDave Kleikamp case Opt_noload: 1559fd8c37ecSTheodore Ts'o set_opt(sb, NOLOAD); 1560ac27a0ecSDave Kleikamp break; 1561ac27a0ecSDave Kleikamp case Opt_commit: 1562ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1563ac27a0ecSDave Kleikamp return 0; 1564ac27a0ecSDave Kleikamp if (option < 0) 1565ac27a0ecSDave Kleikamp return 0; 1566ac27a0ecSDave Kleikamp if (option == 0) 1567cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1568ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1569ac27a0ecSDave Kleikamp break; 157030773840STheodore Ts'o case Opt_max_batch_time: 157130773840STheodore Ts'o if (match_int(&args[0], &option)) 157230773840STheodore Ts'o return 0; 157330773840STheodore Ts'o if (option < 0) 157430773840STheodore Ts'o return 0; 157530773840STheodore Ts'o if (option == 0) 157630773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 157730773840STheodore Ts'o sbi->s_max_batch_time = option; 157830773840STheodore Ts'o break; 157930773840STheodore Ts'o case Opt_min_batch_time: 158030773840STheodore Ts'o if (match_int(&args[0], &option)) 158130773840STheodore Ts'o return 0; 158230773840STheodore Ts'o if (option < 0) 158330773840STheodore Ts'o return 0; 158430773840STheodore Ts'o sbi->s_min_batch_time = option; 158530773840STheodore Ts'o break; 1586ac27a0ecSDave Kleikamp case Opt_data_journal: 1587617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1588ac27a0ecSDave Kleikamp goto datacheck; 1589ac27a0ecSDave Kleikamp case Opt_data_ordered: 1590617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1591ac27a0ecSDave Kleikamp goto datacheck; 1592ac27a0ecSDave Kleikamp case Opt_data_writeback: 1593617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1594ac27a0ecSDave Kleikamp datacheck: 1595ac27a0ecSDave Kleikamp if (is_remount) { 1596482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1597b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1598b31e1552SEric Sandeen "Cannot change data mode on remount"); 1599ac27a0ecSDave Kleikamp return 0; 1600ac27a0ecSDave Kleikamp } 1601ac27a0ecSDave Kleikamp } else { 1602fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 1603ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1604ac27a0ecSDave Kleikamp } 1605ac27a0ecSDave Kleikamp break; 16065bf5683aSHidehiro Kawai case Opt_data_err_abort: 1607fd8c37ecSTheodore Ts'o set_opt(sb, DATA_ERR_ABORT); 16085bf5683aSHidehiro Kawai break; 16095bf5683aSHidehiro Kawai case Opt_data_err_ignore: 1610fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_ERR_ABORT); 16115bf5683aSHidehiro Kawai break; 1612ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1613ac27a0ecSDave Kleikamp case Opt_usrjquota: 161456c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 161556c50f11SDmitry Monakhov return 0; 161656c50f11SDmitry Monakhov break; 1617ac27a0ecSDave Kleikamp case Opt_grpjquota: 161856c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1619ac27a0ecSDave Kleikamp return 0; 1620ac27a0ecSDave Kleikamp break; 1621ac27a0ecSDave Kleikamp case Opt_offusrjquota: 162256c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1623ac27a0ecSDave Kleikamp return 0; 1624ac27a0ecSDave Kleikamp break; 162556c50f11SDmitry Monakhov case Opt_offgrpjquota: 162656c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 162756c50f11SDmitry Monakhov return 0; 162856c50f11SDmitry Monakhov break; 162956c50f11SDmitry Monakhov 1630ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1631dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1632dfc5d03fSJan Kara goto set_qf_format; 1633ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1634dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 16355a20bdfcSJan Kara goto set_qf_format; 16365a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 16375a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1638dfc5d03fSJan Kara set_qf_format: 163917bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1640dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1641b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1642dfc5d03fSJan Kara "journaled quota options when " 1643b31e1552SEric Sandeen "quota turned on"); 1644dfc5d03fSJan Kara return 0; 1645dfc5d03fSJan Kara } 1646dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1647ac27a0ecSDave Kleikamp break; 1648ac27a0ecSDave Kleikamp case Opt_quota: 1649ac27a0ecSDave Kleikamp case Opt_usrquota: 1650fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1651fd8c37ecSTheodore Ts'o set_opt(sb, USRQUOTA); 1652ac27a0ecSDave Kleikamp break; 1653ac27a0ecSDave Kleikamp case Opt_grpquota: 1654fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1655fd8c37ecSTheodore Ts'o set_opt(sb, GRPQUOTA); 1656ac27a0ecSDave Kleikamp break; 1657ac27a0ecSDave Kleikamp case Opt_noquota: 165817bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1659b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1660b31e1552SEric Sandeen "options when quota turned on"); 1661ac27a0ecSDave Kleikamp return 0; 1662ac27a0ecSDave Kleikamp } 1663fd8c37ecSTheodore Ts'o clear_opt(sb, QUOTA); 1664fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1665fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1666ac27a0ecSDave Kleikamp break; 1667ac27a0ecSDave Kleikamp #else 1668ac27a0ecSDave Kleikamp case Opt_quota: 1669ac27a0ecSDave Kleikamp case Opt_usrquota: 1670ac27a0ecSDave Kleikamp case Opt_grpquota: 1671b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1672b31e1552SEric Sandeen "quota options not supported"); 1673cd59e7b9SJan Kara break; 1674ac27a0ecSDave Kleikamp case Opt_usrjquota: 1675ac27a0ecSDave Kleikamp case Opt_grpjquota: 1676ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1677ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1678ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1679ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 16805a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1682b31e1552SEric Sandeen "journaled quota options not supported"); 1683ac27a0ecSDave Kleikamp break; 1684ac27a0ecSDave Kleikamp case Opt_noquota: 1685ac27a0ecSDave Kleikamp break; 1686ac27a0ecSDave Kleikamp #endif 1687ac27a0ecSDave Kleikamp case Opt_abort: 16884ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1689ac27a0ecSDave Kleikamp break; 169006705bffSTheodore Ts'o case Opt_nobarrier: 1691fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 169206705bffSTheodore Ts'o break; 1693ac27a0ecSDave Kleikamp case Opt_barrier: 169415121c18SEric Sandeen if (args[0].from) { 169515121c18SEric Sandeen if (match_int(&args[0], &option)) 169615121c18SEric Sandeen return 0; 169715121c18SEric Sandeen } else 169815121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1699ac27a0ecSDave Kleikamp if (option) 1700fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 1701ac27a0ecSDave Kleikamp else 1702fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 1703ac27a0ecSDave Kleikamp break; 1704ac27a0ecSDave Kleikamp case Opt_ignore: 1705ac27a0ecSDave Kleikamp break; 1706ac27a0ecSDave Kleikamp case Opt_resize: 1707ac27a0ecSDave Kleikamp if (!is_remount) { 1708b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1709b31e1552SEric Sandeen "resize option only available " 1710b31e1552SEric Sandeen "for remount"); 1711ac27a0ecSDave Kleikamp return 0; 1712ac27a0ecSDave Kleikamp } 1713ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1714ac27a0ecSDave Kleikamp return 0; 1715ac27a0ecSDave Kleikamp *n_blocks_count = option; 1716ac27a0ecSDave Kleikamp break; 1717ac27a0ecSDave Kleikamp case Opt_nobh: 1718206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1719206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1720ac27a0ecSDave Kleikamp break; 1721ac27a0ecSDave Kleikamp case Opt_bh: 1722206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1723206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1724ac27a0ecSDave Kleikamp break; 172525ec56b5SJean Noel Cordenner case Opt_i_version: 1726fd8c37ecSTheodore Ts'o set_opt(sb, I_VERSION); 172725ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 172825ec56b5SJean Noel Cordenner break; 1729dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1730fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 1731dd919b98SAneesh Kumar K.V break; 17321449032bSTheodore Ts'o case Opt_mblk_io_submit: 1733fd8c37ecSTheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 17341449032bSTheodore Ts'o break; 17351449032bSTheodore Ts'o case Opt_nomblk_io_submit: 1736fd8c37ecSTheodore Ts'o clear_opt(sb, MBLK_IO_SUBMIT); 17371449032bSTheodore Ts'o break; 1738c9de560dSAlex Tomas case Opt_stripe: 1739c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1740c9de560dSAlex Tomas return 0; 1741c9de560dSAlex Tomas if (option < 0) 1742c9de560dSAlex Tomas return 0; 1743c9de560dSAlex Tomas sbi->s_stripe = option; 1744c9de560dSAlex Tomas break; 174564769240SAlex Tomas case Opt_delalloc: 1746fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 174764769240SAlex Tomas break; 17486fd058f7STheodore Ts'o case Opt_block_validity: 1749fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 17506fd058f7STheodore Ts'o break; 17516fd058f7STheodore Ts'o case Opt_noblock_validity: 1752fd8c37ecSTheodore Ts'o clear_opt(sb, BLOCK_VALIDITY); 17536fd058f7STheodore Ts'o break; 1754240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1755240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1756240799cdSTheodore Ts'o return 0; 1757240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1758240799cdSTheodore Ts'o return 0; 1759f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1760b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1761b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1762b31e1552SEric Sandeen " must be a power of 2"); 17633197ebdbSTheodore Ts'o return 0; 17643197ebdbSTheodore Ts'o } 1765240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1766240799cdSTheodore Ts'o break; 1767b3881f74STheodore Ts'o case Opt_journal_ioprio: 1768b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1769b3881f74STheodore Ts'o return 0; 1770b3881f74STheodore Ts'o if (option < 0 || option > 7) 1771b3881f74STheodore Ts'o break; 1772b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1773b3881f74STheodore Ts'o option); 1774b3881f74STheodore Ts'o break; 177506705bffSTheodore Ts'o case Opt_noauto_da_alloc: 1776fd8c37ecSTheodore Ts'o set_opt(sb, NO_AUTO_DA_ALLOC); 177706705bffSTheodore Ts'o break; 1778afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 177915121c18SEric Sandeen if (args[0].from) { 178015121c18SEric Sandeen if (match_int(&args[0], &option)) 178115121c18SEric Sandeen return 0; 178215121c18SEric Sandeen } else 178315121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1784afd4672dSTheodore Ts'o if (option) 1785fd8c37ecSTheodore Ts'o clear_opt(sb, NO_AUTO_DA_ALLOC); 1786afd4672dSTheodore Ts'o else 1787fd8c37ecSTheodore Ts'o set_opt(sb,NO_AUTO_DA_ALLOC); 1788afd4672dSTheodore Ts'o break; 17895328e635SEric Sandeen case Opt_discard: 1790fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 17915328e635SEric Sandeen break; 17925328e635SEric Sandeen case Opt_nodiscard: 1793fd8c37ecSTheodore Ts'o clear_opt(sb, DISCARD); 17945328e635SEric Sandeen break; 1795744692dcSJiaying Zhang case Opt_dioread_nolock: 1796fd8c37ecSTheodore Ts'o set_opt(sb, DIOREAD_NOLOCK); 1797744692dcSJiaying Zhang break; 1798744692dcSJiaying Zhang case Opt_dioread_lock: 1799fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 1800744692dcSJiaying Zhang break; 1801bfff6873SLukas Czerner case Opt_init_inode_table: 1802fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 1803bfff6873SLukas Czerner if (args[0].from) { 1804bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1805bfff6873SLukas Czerner return 0; 1806bfff6873SLukas Czerner } else 1807bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1808bfff6873SLukas Czerner if (option < 0) 1809bfff6873SLukas Czerner return 0; 1810bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1811bfff6873SLukas Czerner break; 1812bfff6873SLukas Czerner case Opt_noinit_inode_table: 1813fd8c37ecSTheodore Ts'o clear_opt(sb, INIT_INODE_TABLE); 1814bfff6873SLukas Czerner break; 1815ac27a0ecSDave Kleikamp default: 1816b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1817b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1818b31e1552SEric Sandeen "or missing value", p); 1819ac27a0ecSDave Kleikamp return 0; 1820ac27a0ecSDave Kleikamp } 1821ac27a0ecSDave Kleikamp } 1822ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1823ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1824482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1825fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1826ac27a0ecSDave Kleikamp 1827482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1828fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1829ac27a0ecSDave Kleikamp 183056c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1831b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1832b31e1552SEric Sandeen "format mixing"); 1833ac27a0ecSDave Kleikamp return 0; 1834ac27a0ecSDave Kleikamp } 1835ac27a0ecSDave Kleikamp 1836ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1837b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1838b31e1552SEric Sandeen "not specified"); 1839ac27a0ecSDave Kleikamp return 0; 1840ac27a0ecSDave Kleikamp } 1841ac27a0ecSDave Kleikamp } else { 1842ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1843b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 18442c8be6b2SJan Kara "specified with no journaling " 1845b31e1552SEric Sandeen "enabled"); 1846ac27a0ecSDave Kleikamp return 0; 1847ac27a0ecSDave Kleikamp } 1848ac27a0ecSDave Kleikamp } 1849ac27a0ecSDave Kleikamp #endif 1850ac27a0ecSDave Kleikamp return 1; 1851ac27a0ecSDave Kleikamp } 1852ac27a0ecSDave Kleikamp 1853617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1854ac27a0ecSDave Kleikamp int read_only) 1855ac27a0ecSDave Kleikamp { 1856617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1857ac27a0ecSDave Kleikamp int res = 0; 1858ac27a0ecSDave Kleikamp 1859617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1860b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1861b31e1552SEric Sandeen "forcing read-only mode"); 1862ac27a0ecSDave Kleikamp res = MS_RDONLY; 1863ac27a0ecSDave Kleikamp } 1864ac27a0ecSDave Kleikamp if (read_only) 1865ac27a0ecSDave Kleikamp return res; 1866617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1867b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1868b31e1552SEric Sandeen "running e2fsck is recommended"); 1869617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1870b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1871b31e1552SEric Sandeen "warning: mounting fs with errors, " 1872b31e1552SEric Sandeen "running e2fsck is recommended"); 1873ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1874ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1875ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1876b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1877b31e1552SEric Sandeen "warning: maximal mount count reached, " 1878b31e1552SEric Sandeen "running e2fsck is recommended"); 1879ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1880ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1881ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1882b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1883b31e1552SEric Sandeen "warning: checktime reached, " 1884b31e1552SEric Sandeen "running e2fsck is recommended"); 18850390131bSFrank Mayhar if (!sbi->s_journal) 1886216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1887ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1888617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1889e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1890ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1891617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18920390131bSFrank Mayhar if (sbi->s_journal) 1893617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1894ac27a0ecSDave Kleikamp 1895e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1896ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1897a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 18987f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1899ac27a0ecSDave Kleikamp sb->s_blocksize, 1900ac27a0ecSDave Kleikamp sbi->s_groups_count, 1901617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1902617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1903ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1904ac27a0ecSDave Kleikamp 1905ac27a0ecSDave Kleikamp return res; 1906ac27a0ecSDave Kleikamp } 1907ac27a0ecSDave Kleikamp 1908772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1909772cb7c8SJose R. Santos { 1910772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1911772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1912772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1913772cb7c8SJose R. Santos ext4_group_t flex_group; 1914772cb7c8SJose R. Santos int groups_per_flex = 0; 1915c5ca7c76STheodore Ts'o size_t size; 1916772cb7c8SJose R. Santos int i; 1917772cb7c8SJose R. Santos 1918503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1919503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1920503358aeSTheodore Ts'o 1921503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1922772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1923772cb7c8SJose R. Santos return 1; 1924772cb7c8SJose R. Santos } 1925772cb7c8SJose R. Santos 1926c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1927c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1928d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1929d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1930c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1931c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1932c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1933c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1934c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1935c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1936c5ca7c76STheodore Ts'o } 1937772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1938b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1939b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1940772cb7c8SJose R. Santos goto failed; 1941772cb7c8SJose R. Santos } 1942772cb7c8SJose R. Santos 1943772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 194488b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1945772cb7c8SJose R. Santos 1946772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19477ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19487ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 19497ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 19507ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 19517ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19527ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1953772cb7c8SJose R. Santos } 1954772cb7c8SJose R. Santos 1955772cb7c8SJose R. Santos return 1; 1956772cb7c8SJose R. Santos failed: 1957772cb7c8SJose R. Santos return 0; 1958772cb7c8SJose R. Santos } 1959772cb7c8SJose R. Santos 1960717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1961717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1962717d50e4SAndreas Dilger { 1963717d50e4SAndreas Dilger __u16 crc = 0; 1964717d50e4SAndreas Dilger 1965717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1966717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1967717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1968717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1969717d50e4SAndreas Dilger 1970717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1971717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1972717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1973717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1974717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1975717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1976717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1977717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1978717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1979717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1980717d50e4SAndreas Dilger offset); 1981717d50e4SAndreas Dilger } 1982717d50e4SAndreas Dilger 1983717d50e4SAndreas Dilger return cpu_to_le16(crc); 1984717d50e4SAndreas Dilger } 1985717d50e4SAndreas Dilger 1986717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1987717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1988717d50e4SAndreas Dilger { 1989717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1990717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1991717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1992717d50e4SAndreas Dilger return 0; 1993717d50e4SAndreas Dilger 1994717d50e4SAndreas Dilger return 1; 1995717d50e4SAndreas Dilger } 1996717d50e4SAndreas Dilger 1997ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1998bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 1999bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2000ac27a0ecSDave Kleikamp { 2001617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2002617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2003617ba13bSMingming Cao ext4_fsblk_t last_block; 2004bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2005bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2006bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2007ce421581SJose R. Santos int flexbg_flag = 0; 2008bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2009ac27a0ecSDave Kleikamp 2010ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2011ce421581SJose R. Santos flexbg_flag = 1; 2012ce421581SJose R. Santos 2013617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2014ac27a0ecSDave Kleikamp 2015197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2016197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2017197cd65aSAkinobu Mita 2018ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2019bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2020ac27a0ecSDave Kleikamp else 2021ac27a0ecSDave Kleikamp last_block = first_block + 2022617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2023ac27a0ecSDave Kleikamp 2024bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2025bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2026bfff6873SLukas Czerner grp = i; 2027bfff6873SLukas Czerner 20288fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20292b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2030b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2031a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2032b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2033ac27a0ecSDave Kleikamp return 0; 2034ac27a0ecSDave Kleikamp } 20358fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20362b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2037b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2038a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2039b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2040ac27a0ecSDave Kleikamp return 0; 2041ac27a0ecSDave Kleikamp } 20428fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2043bd81d8eeSLaurent Vivier if (inode_table < first_block || 20442b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2045b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2046a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2047b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2048ac27a0ecSDave Kleikamp return 0; 2049ac27a0ecSDave Kleikamp } 2050955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2051717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2052b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2053b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2054fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2055fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20567ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2057955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2058717d50e4SAndreas Dilger return 0; 2059717d50e4SAndreas Dilger } 20607ee1ec4cSLi Zefan } 2061955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2062ce421581SJose R. Santos if (!flexbg_flag) 2063617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2064ac27a0ecSDave Kleikamp } 2065bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2066bfff6873SLukas Czerner *first_not_zeroed = grp; 2067ac27a0ecSDave Kleikamp 2068bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 2069617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2070ac27a0ecSDave Kleikamp return 1; 2071ac27a0ecSDave Kleikamp } 2072ac27a0ecSDave Kleikamp 2073617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2074ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2075ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2076ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2077ac27a0ecSDave Kleikamp * 2078ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2079ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2080ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2081ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2082ac27a0ecSDave Kleikamp * 2083ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2084ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2085ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2086617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2087ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2088ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2089ac27a0ecSDave Kleikamp */ 2090617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2091617ba13bSMingming Cao struct ext4_super_block *es) 2092ac27a0ecSDave Kleikamp { 2093ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2094ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2095ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2096ac27a0ecSDave Kleikamp int i; 2097ac27a0ecSDave Kleikamp #endif 2098ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2099ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2100ac27a0ecSDave Kleikamp return; 2101ac27a0ecSDave Kleikamp } 2102ac27a0ecSDave Kleikamp 2103a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2104b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2105b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2106a8f48a95SEric Sandeen return; 2107a8f48a95SEric Sandeen } 2108a8f48a95SEric Sandeen 2109617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2110ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2111ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2112ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2113ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2114ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2115ac27a0ecSDave Kleikamp return; 2116ac27a0ecSDave Kleikamp } 2117ac27a0ecSDave Kleikamp 2118ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2119b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2120ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2121ac27a0ecSDave Kleikamp } 2122ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2123ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2124ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2125ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2126ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2127617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2128617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2129ac27a0ecSDave Kleikamp if (ret < 0) 2130b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2131b31e1552SEric Sandeen "Cannot turn on journaled " 2132b31e1552SEric Sandeen "quota: error %d", ret); 2133ac27a0ecSDave Kleikamp } 2134ac27a0ecSDave Kleikamp } 2135ac27a0ecSDave Kleikamp #endif 2136ac27a0ecSDave Kleikamp 2137ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2138ac27a0ecSDave Kleikamp struct inode *inode; 2139ac27a0ecSDave Kleikamp 214097bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 214197bd42b9SJosef Bacik if (IS_ERR(inode)) { 2142ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2143ac27a0ecSDave Kleikamp break; 2144ac27a0ecSDave Kleikamp } 2145ac27a0ecSDave Kleikamp 2146617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2147871a2931SChristoph Hellwig dquot_initialize(inode); 2148ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2149b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2150b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 215146e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2152e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2153ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2154617ba13bSMingming Cao ext4_truncate(inode); 2155ac27a0ecSDave Kleikamp nr_truncates++; 2156ac27a0ecSDave Kleikamp } else { 2157b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2158b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 215946e665e9SHarvey Harrison __func__, inode->i_ino); 2160ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2161ac27a0ecSDave Kleikamp inode->i_ino); 2162ac27a0ecSDave Kleikamp nr_orphans++; 2163ac27a0ecSDave Kleikamp } 2164ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2165ac27a0ecSDave Kleikamp } 2166ac27a0ecSDave Kleikamp 2167ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2168ac27a0ecSDave Kleikamp 2169ac27a0ecSDave Kleikamp if (nr_orphans) 2170b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2171b31e1552SEric Sandeen PLURAL(nr_orphans)); 2172ac27a0ecSDave Kleikamp if (nr_truncates) 2173b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2174b31e1552SEric Sandeen PLURAL(nr_truncates)); 2175ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2176ac27a0ecSDave Kleikamp /* Turn quotas off */ 2177ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2178ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2179287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2180ac27a0ecSDave Kleikamp } 2181ac27a0ecSDave Kleikamp #endif 2182ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2183ac27a0ecSDave Kleikamp } 21840b8e58a1SAndreas Dilger 2185cd2291a4SEric Sandeen /* 2186cd2291a4SEric Sandeen * Maximal extent format file size. 2187cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2188cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2189cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2190cd2291a4SEric Sandeen * so that won't be a limiting factor. 2191cd2291a4SEric Sandeen * 2192cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2193cd2291a4SEric Sandeen */ 2194f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2195cd2291a4SEric Sandeen { 2196cd2291a4SEric Sandeen loff_t res; 2197cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2198cd2291a4SEric Sandeen 2199cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2200f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2201cd2291a4SEric Sandeen /* 220290c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2203cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2204cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2205cd2291a4SEric Sandeen */ 2206cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2207cd2291a4SEric Sandeen 2208cd2291a4SEric Sandeen /* total blocks in file system block size */ 2209cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2210cd2291a4SEric Sandeen upper_limit <<= blkbits; 2211cd2291a4SEric Sandeen } 2212cd2291a4SEric Sandeen 2213cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2214cd2291a4SEric Sandeen res = 1LL << 32; 2215cd2291a4SEric Sandeen res <<= blkbits; 2216cd2291a4SEric Sandeen res -= 1; 2217cd2291a4SEric Sandeen 2218cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2219cd2291a4SEric Sandeen if (res > upper_limit) 2220cd2291a4SEric Sandeen res = upper_limit; 2221cd2291a4SEric Sandeen 2222cd2291a4SEric Sandeen return res; 2223cd2291a4SEric Sandeen } 2224ac27a0ecSDave Kleikamp 2225ac27a0ecSDave Kleikamp /* 2226cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22270fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22280fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2229ac27a0ecSDave Kleikamp */ 2230f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2231ac27a0ecSDave Kleikamp { 2232617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22330fc1b451SAneesh Kumar K.V int meta_blocks; 22340fc1b451SAneesh Kumar K.V loff_t upper_limit; 22350b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22360b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22370b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22380b8e58a1SAndreas Dilger * 22390b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22400b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22410fc1b451SAneesh Kumar K.V */ 22420fc1b451SAneesh Kumar K.V 2243f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22440fc1b451SAneesh Kumar K.V /* 224590c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22460b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22470b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 22480fc1b451SAneesh Kumar K.V */ 22490fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 22500fc1b451SAneesh Kumar K.V 22510fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 22520fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 22530fc1b451SAneesh Kumar K.V 22540fc1b451SAneesh Kumar K.V } else { 22558180a562SAneesh Kumar K.V /* 22568180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 22578180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 22588180a562SAneesh Kumar K.V * represent total number of blocks in 22598180a562SAneesh Kumar K.V * file system block size 22608180a562SAneesh Kumar K.V */ 22610fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 22620fc1b451SAneesh Kumar K.V 22630fc1b451SAneesh Kumar K.V } 22640fc1b451SAneesh Kumar K.V 22650fc1b451SAneesh Kumar K.V /* indirect blocks */ 22660fc1b451SAneesh Kumar K.V meta_blocks = 1; 22670fc1b451SAneesh Kumar K.V /* double indirect blocks */ 22680fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 22690fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 22700fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 22710fc1b451SAneesh Kumar K.V 22720fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 22730fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2274ac27a0ecSDave Kleikamp 2275ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2276ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2277ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2278ac27a0ecSDave Kleikamp res <<= bits; 2279ac27a0ecSDave Kleikamp if (res > upper_limit) 2280ac27a0ecSDave Kleikamp res = upper_limit; 22810fc1b451SAneesh Kumar K.V 22820fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 22830fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 22840fc1b451SAneesh Kumar K.V 2285ac27a0ecSDave Kleikamp return res; 2286ac27a0ecSDave Kleikamp } 2287ac27a0ecSDave Kleikamp 2288617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 228970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2290ac27a0ecSDave Kleikamp { 2291617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2292fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2293ac27a0ecSDave Kleikamp int has_super = 0; 2294ac27a0ecSDave Kleikamp 2295ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2296ac27a0ecSDave Kleikamp 2297617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2298ac27a0ecSDave Kleikamp nr < first_meta_bg) 229970bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2300ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2301617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2302ac27a0ecSDave Kleikamp has_super = 1; 23030b8e58a1SAndreas Dilger 2304617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2305ac27a0ecSDave Kleikamp } 2306ac27a0ecSDave Kleikamp 2307c9de560dSAlex Tomas /** 2308c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2309c9de560dSAlex Tomas * @sbi: In memory super block info 2310c9de560dSAlex Tomas * 2311c9de560dSAlex Tomas * If we have specified it via mount option, then 2312c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2313c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2314c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2315c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2316c9de560dSAlex Tomas * 2317c9de560dSAlex Tomas */ 2318c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2319c9de560dSAlex Tomas { 2320c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2321c9de560dSAlex Tomas unsigned long stripe_width = 2322c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2323c9de560dSAlex Tomas 2324c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2325c9de560dSAlex Tomas return sbi->s_stripe; 2326c9de560dSAlex Tomas 2327c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2328c9de560dSAlex Tomas return stripe_width; 2329c9de560dSAlex Tomas 2330c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2331c9de560dSAlex Tomas return stride; 2332c9de560dSAlex Tomas 2333c9de560dSAlex Tomas return 0; 2334c9de560dSAlex Tomas } 2335ac27a0ecSDave Kleikamp 23363197ebdbSTheodore Ts'o /* sysfs supprt */ 23373197ebdbSTheodore Ts'o 23383197ebdbSTheodore Ts'o struct ext4_attr { 23393197ebdbSTheodore Ts'o struct attribute attr; 23403197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23413197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23423197ebdbSTheodore Ts'o const char *, size_t); 23433197ebdbSTheodore Ts'o int offset; 23443197ebdbSTheodore Ts'o }; 23453197ebdbSTheodore Ts'o 23463197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23473197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 23483197ebdbSTheodore Ts'o { 23493197ebdbSTheodore Ts'o char *endp; 23503197ebdbSTheodore Ts'o 2351e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2352e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 23533197ebdbSTheodore Ts'o if (*endp || *value > max) 23543197ebdbSTheodore Ts'o return -EINVAL; 23553197ebdbSTheodore Ts'o 23563197ebdbSTheodore Ts'o return 0; 23573197ebdbSTheodore Ts'o } 23583197ebdbSTheodore Ts'o 23593197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 23603197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23613197ebdbSTheodore Ts'o char *buf) 23623197ebdbSTheodore Ts'o { 23633197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 23643197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 23653197ebdbSTheodore Ts'o } 23663197ebdbSTheodore Ts'o 23673197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 23683197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23693197ebdbSTheodore Ts'o { 23703197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23713197ebdbSTheodore Ts'o 2372f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2373f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23743197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 23753197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 23763197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 23773197ebdbSTheodore Ts'o } 23783197ebdbSTheodore Ts'o 23793197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 23803197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23813197ebdbSTheodore Ts'o { 23823197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23833197ebdbSTheodore Ts'o 2384f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2385f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23863197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2387a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 23883197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2389a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 23903197ebdbSTheodore Ts'o } 23913197ebdbSTheodore Ts'o 23923197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 23933197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23943197ebdbSTheodore Ts'o const char *buf, size_t count) 23953197ebdbSTheodore Ts'o { 23963197ebdbSTheodore Ts'o unsigned long t; 23973197ebdbSTheodore Ts'o 23983197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 23993197ebdbSTheodore Ts'o return -EINVAL; 24003197ebdbSTheodore Ts'o 2401f7c43950STheodore Ts'o if (!is_power_of_2(t)) 24023197ebdbSTheodore Ts'o return -EINVAL; 24033197ebdbSTheodore Ts'o 24043197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24053197ebdbSTheodore Ts'o return count; 24063197ebdbSTheodore Ts'o } 24073197ebdbSTheodore Ts'o 24083197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24093197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24103197ebdbSTheodore Ts'o { 24113197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24123197ebdbSTheodore Ts'o 24133197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24143197ebdbSTheodore Ts'o } 24153197ebdbSTheodore Ts'o 24163197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24173197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24183197ebdbSTheodore Ts'o const char *buf, size_t count) 24193197ebdbSTheodore Ts'o { 24203197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24213197ebdbSTheodore Ts'o unsigned long t; 24223197ebdbSTheodore Ts'o 24233197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24243197ebdbSTheodore Ts'o return -EINVAL; 24253197ebdbSTheodore Ts'o *ui = t; 24263197ebdbSTheodore Ts'o return count; 24273197ebdbSTheodore Ts'o } 24283197ebdbSTheodore Ts'o 24293197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24303197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24313197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24323197ebdbSTheodore Ts'o .show = _show, \ 24333197ebdbSTheodore Ts'o .store = _store, \ 24343197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24353197ebdbSTheodore Ts'o } 24363197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 24373197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 24383197ebdbSTheodore Ts'o 2439857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 24403197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 24413197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 24423197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 24433197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 24443197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 24453197ebdbSTheodore Ts'o 24463197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 24473197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 24483197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 24493197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 24503197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 245111013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 24523197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 24533197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 24543197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 24553197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 24563197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 24573197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 245855138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 24593197ebdbSTheodore Ts'o 24603197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 24613197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 24623197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 24633197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 24643197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 246511013911SAndreas Dilger ATTR_LIST(inode_goal), 24663197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 24673197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 24683197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 24693197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 24703197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 24713197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 247255138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 24733197ebdbSTheodore Ts'o NULL, 24743197ebdbSTheodore Ts'o }; 24753197ebdbSTheodore Ts'o 2476857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2477857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 247827ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2479857ac889SLukas Czerner 2480857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2481857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 248227ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2483857ac889SLukas Czerner NULL, 2484857ac889SLukas Czerner }; 2485857ac889SLukas Czerner 24863197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 24873197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 24883197ebdbSTheodore Ts'o { 24893197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24903197ebdbSTheodore Ts'o s_kobj); 24913197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 24923197ebdbSTheodore Ts'o 24933197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 24943197ebdbSTheodore Ts'o } 24953197ebdbSTheodore Ts'o 24963197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 24973197ebdbSTheodore Ts'o struct attribute *attr, 24983197ebdbSTheodore Ts'o const char *buf, size_t len) 24993197ebdbSTheodore Ts'o { 25003197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25013197ebdbSTheodore Ts'o s_kobj); 25023197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25033197ebdbSTheodore Ts'o 25043197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25053197ebdbSTheodore Ts'o } 25063197ebdbSTheodore Ts'o 25073197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25083197ebdbSTheodore Ts'o { 25093197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25103197ebdbSTheodore Ts'o s_kobj); 25113197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25123197ebdbSTheodore Ts'o } 25133197ebdbSTheodore Ts'o 251452cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25153197ebdbSTheodore Ts'o .show = ext4_attr_show, 25163197ebdbSTheodore Ts'o .store = ext4_attr_store, 25173197ebdbSTheodore Ts'o }; 25183197ebdbSTheodore Ts'o 25193197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 25203197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25213197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25223197ebdbSTheodore Ts'o .release = ext4_sb_release, 25233197ebdbSTheodore Ts'o }; 25243197ebdbSTheodore Ts'o 2525857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2526857ac889SLukas Czerner { 2527857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2528857ac889SLukas Czerner } 2529857ac889SLukas Czerner 2530857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2531857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2532857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2533857ac889SLukas Czerner .release = ext4_feat_release, 2534857ac889SLukas Czerner }; 2535857ac889SLukas Czerner 2536a13fb1a4SEric Sandeen /* 2537a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2538a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2539a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2540a13fb1a4SEric Sandeen * 0 if it cannot be. 2541a13fb1a4SEric Sandeen */ 2542a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2543a13fb1a4SEric Sandeen { 2544a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2545a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2546a13fb1a4SEric Sandeen "Couldn't mount because of " 2547a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2548a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2549a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2550a13fb1a4SEric Sandeen return 0; 2551a13fb1a4SEric Sandeen } 2552a13fb1a4SEric Sandeen 2553a13fb1a4SEric Sandeen if (readonly) 2554a13fb1a4SEric Sandeen return 1; 2555a13fb1a4SEric Sandeen 2556a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2557a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2558a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2559a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2560a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2561a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2562a13fb1a4SEric Sandeen return 0; 2563a13fb1a4SEric Sandeen } 2564a13fb1a4SEric Sandeen /* 2565a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2566a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2567a13fb1a4SEric Sandeen */ 2568a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2569a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2570a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2571a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2572a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2573a13fb1a4SEric Sandeen return 0; 2574a13fb1a4SEric Sandeen } 2575a13fb1a4SEric Sandeen } 2576a13fb1a4SEric Sandeen return 1; 2577a13fb1a4SEric Sandeen } 2578a13fb1a4SEric Sandeen 257966e61a9eSTheodore Ts'o /* 258066e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 258166e61a9eSTheodore Ts'o * on the file system 258266e61a9eSTheodore Ts'o */ 258366e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 258466e61a9eSTheodore Ts'o { 258566e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 258666e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 258766e61a9eSTheodore Ts'o struct ext4_super_block *es; 258866e61a9eSTheodore Ts'o 258966e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 259066e61a9eSTheodore Ts'o es = sbi->s_es; 259166e61a9eSTheodore Ts'o 259266e61a9eSTheodore Ts'o if (es->s_error_count) 259366e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 259466e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 259566e61a9eSTheodore Ts'o if (es->s_first_error_time) { 259666e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 259766e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 259866e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 259966e61a9eSTheodore Ts'o es->s_first_error_func, 260066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 260166e61a9eSTheodore Ts'o if (es->s_first_error_ino) 260266e61a9eSTheodore Ts'o printk(": inode %u", 260366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 260466e61a9eSTheodore Ts'o if (es->s_first_error_block) 260566e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 260666e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 260766e61a9eSTheodore Ts'o printk("\n"); 260866e61a9eSTheodore Ts'o } 260966e61a9eSTheodore Ts'o if (es->s_last_error_time) { 261066e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 261166e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 261266e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 261366e61a9eSTheodore Ts'o es->s_last_error_func, 261466e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 261566e61a9eSTheodore Ts'o if (es->s_last_error_ino) 261666e61a9eSTheodore Ts'o printk(": inode %u", 261766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 261866e61a9eSTheodore Ts'o if (es->s_last_error_block) 261966e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 262066e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 262166e61a9eSTheodore Ts'o printk("\n"); 262266e61a9eSTheodore Ts'o } 262366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 262466e61a9eSTheodore Ts'o } 262566e61a9eSTheodore Ts'o 2626bfff6873SLukas Czerner static void ext4_lazyinode_timeout(unsigned long data) 2627bfff6873SLukas Czerner { 2628bfff6873SLukas Czerner struct task_struct *p = (struct task_struct *)data; 2629bfff6873SLukas Czerner wake_up_process(p); 2630bfff6873SLukas Czerner } 2631bfff6873SLukas Czerner 2632bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2633bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2634bfff6873SLukas Czerner { 2635bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2636bfff6873SLukas Czerner ext4_group_t group, ngroups; 2637bfff6873SLukas Czerner struct super_block *sb; 2638bfff6873SLukas Czerner unsigned long timeout = 0; 2639bfff6873SLukas Czerner int ret = 0; 2640bfff6873SLukas Czerner 2641bfff6873SLukas Czerner sb = elr->lr_super; 2642bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2643bfff6873SLukas Czerner 2644bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2645bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2646bfff6873SLukas Czerner if (!gdp) { 2647bfff6873SLukas Czerner ret = 1; 2648bfff6873SLukas Czerner break; 2649bfff6873SLukas Czerner } 2650bfff6873SLukas Czerner 2651bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2652bfff6873SLukas Czerner break; 2653bfff6873SLukas Czerner } 2654bfff6873SLukas Czerner 2655bfff6873SLukas Czerner if (group == ngroups) 2656bfff6873SLukas Czerner ret = 1; 2657bfff6873SLukas Czerner 2658bfff6873SLukas Czerner if (!ret) { 2659bfff6873SLukas Czerner timeout = jiffies; 2660bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2661bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2662bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 2663bfff6873SLukas Czerner timeout = jiffies - timeout; 2664bfff6873SLukas Czerner if (elr->lr_sbi->s_li_wait_mult) 2665bfff6873SLukas Czerner timeout *= elr->lr_sbi->s_li_wait_mult; 2666bfff6873SLukas Czerner else 2667bfff6873SLukas Czerner timeout *= 20; 2668bfff6873SLukas Czerner elr->lr_timeout = timeout; 2669bfff6873SLukas Czerner } 2670bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2671bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2672bfff6873SLukas Czerner } 2673bfff6873SLukas Czerner 2674bfff6873SLukas Czerner return ret; 2675bfff6873SLukas Czerner } 2676bfff6873SLukas Czerner 2677bfff6873SLukas Czerner /* 2678bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 2679bfff6873SLukas Czerner * request tructure. Should be called with li_list_mtx held 2680bfff6873SLukas Czerner */ 2681bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2682bfff6873SLukas Czerner { 2683bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2684bfff6873SLukas Czerner 2685bfff6873SLukas Czerner if (!elr) 2686bfff6873SLukas Czerner return; 2687bfff6873SLukas Czerner 2688bfff6873SLukas Czerner sbi = elr->lr_sbi; 2689bfff6873SLukas Czerner 2690bfff6873SLukas Czerner list_del(&elr->lr_request); 2691bfff6873SLukas Czerner sbi->s_li_request = NULL; 2692bfff6873SLukas Czerner kfree(elr); 2693bfff6873SLukas Czerner } 2694bfff6873SLukas Czerner 2695bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2696bfff6873SLukas Czerner { 2697bfff6873SLukas Czerner struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; 2698bfff6873SLukas Czerner 2699bfff6873SLukas Czerner if (!ext4_li_info) 2700bfff6873SLukas Czerner return; 2701bfff6873SLukas Czerner 2702bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2703bfff6873SLukas Czerner ext4_remove_li_request(elr); 2704bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2705bfff6873SLukas Czerner } 2706bfff6873SLukas Czerner 2707bfff6873SLukas Czerner /* 2708bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2709bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2710bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2711bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2712bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2713bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2714bfff6873SLukas Czerner * next waking time and put itself into sleep. 2715bfff6873SLukas Czerner */ 2716bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2717bfff6873SLukas Czerner { 2718bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2719bfff6873SLukas Czerner struct list_head *pos, *n; 2720bfff6873SLukas Czerner struct ext4_li_request *elr; 2721bfff6873SLukas Czerner unsigned long next_wakeup; 2722bfff6873SLukas Czerner DEFINE_WAIT(wait); 2723bfff6873SLukas Czerner 2724bfff6873SLukas Czerner BUG_ON(NULL == eli); 2725bfff6873SLukas Czerner 2726bfff6873SLukas Czerner eli->li_timer.data = (unsigned long)current; 2727bfff6873SLukas Czerner eli->li_timer.function = ext4_lazyinode_timeout; 2728bfff6873SLukas Czerner 2729bfff6873SLukas Czerner eli->li_task = current; 2730bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2731bfff6873SLukas Czerner 2732bfff6873SLukas Czerner cont_thread: 2733bfff6873SLukas Czerner while (true) { 2734bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2735bfff6873SLukas Czerner 2736bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2737bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2738bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2739bfff6873SLukas Czerner goto exit_thread; 2740bfff6873SLukas Czerner } 2741bfff6873SLukas Czerner 2742bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2743bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2744bfff6873SLukas Czerner lr_request); 2745bfff6873SLukas Czerner 2746b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2747b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2748b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2749bfff6873SLukas Czerner ext4_remove_li_request(elr); 2750bfff6873SLukas Czerner continue; 2751bfff6873SLukas Czerner } 2752b2c78cd0STheodore Ts'o } 2753bfff6873SLukas Czerner 2754bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2755bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2756bfff6873SLukas Czerner } 2757bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2758bfff6873SLukas Czerner 2759bfff6873SLukas Czerner if (freezing(current)) 2760bfff6873SLukas Czerner refrigerator(); 2761bfff6873SLukas Czerner 2762f4245bd4SLukas Czerner if ((time_after_eq(jiffies, next_wakeup)) || 2763f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2764bfff6873SLukas Czerner cond_resched(); 2765bfff6873SLukas Czerner continue; 2766bfff6873SLukas Czerner } 2767bfff6873SLukas Czerner 2768bfff6873SLukas Czerner eli->li_timer.expires = next_wakeup; 2769bfff6873SLukas Czerner add_timer(&eli->li_timer); 2770bfff6873SLukas Czerner prepare_to_wait(&eli->li_wait_daemon, &wait, 2771bfff6873SLukas Czerner TASK_INTERRUPTIBLE); 2772bfff6873SLukas Czerner if (time_before(jiffies, next_wakeup)) 2773bfff6873SLukas Czerner schedule(); 2774bfff6873SLukas Czerner finish_wait(&eli->li_wait_daemon, &wait); 2775bfff6873SLukas Czerner } 2776bfff6873SLukas Czerner 2777bfff6873SLukas Czerner exit_thread: 2778bfff6873SLukas Czerner /* 2779bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2780bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2781bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2782bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2783bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2784bfff6873SLukas Czerner * new one. 2785bfff6873SLukas Czerner */ 2786bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2787bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2788bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2789bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2790bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2791bfff6873SLukas Czerner goto cont_thread; 2792bfff6873SLukas Czerner } 2793bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2794bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2795bfff6873SLukas Czerner eli->li_task = NULL; 2796bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2797bfff6873SLukas Czerner 2798bfff6873SLukas Czerner kfree(ext4_li_info); 2799bfff6873SLukas Czerner ext4_li_info = NULL; 2800bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2801bfff6873SLukas Czerner 2802bfff6873SLukas Czerner return 0; 2803bfff6873SLukas Czerner } 2804bfff6873SLukas Czerner 2805bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2806bfff6873SLukas Czerner { 2807bfff6873SLukas Czerner struct list_head *pos, *n; 2808bfff6873SLukas Czerner struct ext4_li_request *elr; 2809bfff6873SLukas Czerner 2810bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2811bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2812bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2813bfff6873SLukas Czerner lr_request); 2814bfff6873SLukas Czerner ext4_remove_li_request(elr); 2815bfff6873SLukas Czerner } 2816bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2817bfff6873SLukas Czerner } 2818bfff6873SLukas Czerner 2819bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2820bfff6873SLukas Czerner { 2821bfff6873SLukas Czerner struct task_struct *t; 2822bfff6873SLukas Czerner 2823bfff6873SLukas Czerner t = kthread_run(ext4_lazyinit_thread, ext4_li_info, "ext4lazyinit"); 2824bfff6873SLukas Czerner if (IS_ERR(t)) { 2825bfff6873SLukas Czerner int err = PTR_ERR(t); 2826bfff6873SLukas Czerner ext4_clear_request_list(); 2827bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2828bfff6873SLukas Czerner kfree(ext4_li_info); 2829bfff6873SLukas Czerner ext4_li_info = NULL; 2830bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2831bfff6873SLukas Czerner "initialization thread\n", 2832bfff6873SLukas Czerner err); 2833bfff6873SLukas Czerner return err; 2834bfff6873SLukas Czerner } 2835bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2836bfff6873SLukas Czerner 2837bfff6873SLukas Czerner wait_event(ext4_li_info->li_wait_task, ext4_li_info->li_task != NULL); 2838bfff6873SLukas Czerner return 0; 2839bfff6873SLukas Czerner } 2840bfff6873SLukas Czerner 2841bfff6873SLukas Czerner /* 2842bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2843bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2844bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2845bfff6873SLukas Czerner * groups and return total number of groups. 2846bfff6873SLukas Czerner */ 2847bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2848bfff6873SLukas Czerner { 2849bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2850bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2851bfff6873SLukas Czerner 2852bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2853bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2854bfff6873SLukas Czerner if (!gdp) 2855bfff6873SLukas Czerner continue; 2856bfff6873SLukas Czerner 2857bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2858bfff6873SLukas Czerner break; 2859bfff6873SLukas Czerner } 2860bfff6873SLukas Czerner 2861bfff6873SLukas Czerner return group; 2862bfff6873SLukas Czerner } 2863bfff6873SLukas Czerner 2864bfff6873SLukas Czerner static int ext4_li_info_new(void) 2865bfff6873SLukas Czerner { 2866bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2867bfff6873SLukas Czerner 2868bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2869bfff6873SLukas Czerner if (!eli) 2870bfff6873SLukas Czerner return -ENOMEM; 2871bfff6873SLukas Czerner 2872bfff6873SLukas Czerner eli->li_task = NULL; 2873bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2874bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2875bfff6873SLukas Czerner 2876bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_daemon); 2877bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_task); 2878bfff6873SLukas Czerner init_timer(&eli->li_timer); 2879bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2880bfff6873SLukas Czerner 2881bfff6873SLukas Czerner ext4_li_info = eli; 2882bfff6873SLukas Czerner 2883bfff6873SLukas Czerner return 0; 2884bfff6873SLukas Czerner } 2885bfff6873SLukas Czerner 2886bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2887bfff6873SLukas Czerner ext4_group_t start) 2888bfff6873SLukas Czerner { 2889bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2890bfff6873SLukas Czerner struct ext4_li_request *elr; 2891bfff6873SLukas Czerner unsigned long rnd; 2892bfff6873SLukas Czerner 2893bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2894bfff6873SLukas Czerner if (!elr) 2895bfff6873SLukas Czerner return NULL; 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner elr->lr_super = sb; 2898bfff6873SLukas Czerner elr->lr_sbi = sbi; 2899bfff6873SLukas Czerner elr->lr_next_group = start; 2900bfff6873SLukas Czerner 2901bfff6873SLukas Czerner /* 2902bfff6873SLukas Czerner * Randomize first schedule time of the request to 2903bfff6873SLukas Czerner * spread the inode table initialization requests 2904bfff6873SLukas Czerner * better. 2905bfff6873SLukas Czerner */ 2906bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2907bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2908bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2909bfff6873SLukas Czerner 2910bfff6873SLukas Czerner return elr; 2911bfff6873SLukas Czerner } 2912bfff6873SLukas Czerner 2913bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2914bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2915bfff6873SLukas Czerner { 2916bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2917bfff6873SLukas Czerner struct ext4_li_request *elr; 2918bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 2919beed5ecbSNicolas Kaiser int ret; 2920bfff6873SLukas Czerner 2921bfff6873SLukas Czerner if (sbi->s_li_request != NULL) 2922beed5ecbSNicolas Kaiser return 0; 2923bfff6873SLukas Czerner 2924bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2925bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 2926bfff6873SLukas Czerner !test_opt(sb, INIT_INODE_TABLE)) { 2927bfff6873SLukas Czerner sbi->s_li_request = NULL; 2928beed5ecbSNicolas Kaiser return 0; 2929bfff6873SLukas Czerner } 2930bfff6873SLukas Czerner 2931bfff6873SLukas Czerner if (first_not_zeroed == ngroups) { 2932bfff6873SLukas Czerner sbi->s_li_request = NULL; 2933beed5ecbSNicolas Kaiser return 0; 2934bfff6873SLukas Czerner } 2935bfff6873SLukas Czerner 2936bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2937beed5ecbSNicolas Kaiser if (!elr) 2938beed5ecbSNicolas Kaiser return -ENOMEM; 2939bfff6873SLukas Czerner 2940bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2941bfff6873SLukas Czerner 2942bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2943bfff6873SLukas Czerner ret = ext4_li_info_new(); 2944bfff6873SLukas Czerner if (ret) 2945bfff6873SLukas Czerner goto out; 2946bfff6873SLukas Czerner } 2947bfff6873SLukas Czerner 2948bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2949bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2950bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2951bfff6873SLukas Czerner 2952bfff6873SLukas Czerner sbi->s_li_request = elr; 2953bfff6873SLukas Czerner 2954bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2955bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2956bfff6873SLukas Czerner if (ret) 2957bfff6873SLukas Czerner goto out; 2958bfff6873SLukas Czerner } 2959bfff6873SLukas Czerner out: 2960bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2961beed5ecbSNicolas Kaiser if (ret) 2962bfff6873SLukas Czerner kfree(elr); 2963bfff6873SLukas Czerner return ret; 2964bfff6873SLukas Czerner } 2965bfff6873SLukas Czerner 2966bfff6873SLukas Czerner /* 2967bfff6873SLukas Czerner * We do not need to lock anything since this is called on 2968bfff6873SLukas Czerner * module unload. 2969bfff6873SLukas Czerner */ 2970bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 2971bfff6873SLukas Czerner { 2972bfff6873SLukas Czerner /* 2973bfff6873SLukas Czerner * If thread exited earlier 2974bfff6873SLukas Czerner * there's nothing to be done. 2975bfff6873SLukas Czerner */ 2976bfff6873SLukas Czerner if (!ext4_li_info) 2977bfff6873SLukas Czerner return; 2978bfff6873SLukas Czerner 2979bfff6873SLukas Czerner ext4_clear_request_list(); 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner while (ext4_li_info->li_task) { 2982bfff6873SLukas Czerner wake_up(&ext4_li_info->li_wait_daemon); 2983bfff6873SLukas Czerner wait_event(ext4_li_info->li_wait_task, 2984bfff6873SLukas Czerner ext4_li_info->li_task == NULL); 2985bfff6873SLukas Czerner } 2986bfff6873SLukas Czerner } 2987bfff6873SLukas Czerner 2988617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 29897477827fSAneesh Kumar K.V __releases(kernel_lock) 29907477827fSAneesh Kumar K.V __acquires(kernel_lock) 2991ac27a0ecSDave Kleikamp { 2992d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 2993ac27a0ecSDave Kleikamp struct buffer_head *bh; 2994617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2995617ba13bSMingming Cao struct ext4_sb_info *sbi; 2996617ba13bSMingming Cao ext4_fsblk_t block; 2997617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 299870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2999ac27a0ecSDave Kleikamp unsigned long offset = 0; 3000ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3001ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3002ac27a0ecSDave Kleikamp struct inode *root; 30039f6200bbSTheodore Ts'o char *cp; 30040390131bSFrank Mayhar const char *descr; 3005dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3006ac27a0ecSDave Kleikamp int blocksize; 30074ec11028STheodore Ts'o unsigned int db_count; 30084ec11028STheodore Ts'o unsigned int i; 3009f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 3010bd81d8eeSLaurent Vivier __u64 blocks_count; 3011833f4077SPeter Zijlstra int err; 3012b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3013bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3014ac27a0ecSDave Kleikamp 3015ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3016ac27a0ecSDave Kleikamp if (!sbi) 3017dcc7dae3SCyrill Gorcunov goto out_free_orig; 3018705895b6SPekka Enberg 3019705895b6SPekka Enberg sbi->s_blockgroup_lock = 3020705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3021705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3022705895b6SPekka Enberg kfree(sbi); 3023dcc7dae3SCyrill Gorcunov goto out_free_orig; 3024705895b6SPekka Enberg } 3025ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3026ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3027617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3028617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3029240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3030d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3031f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3032f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3033f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3034ac27a0ecSDave Kleikamp 30359f6200bbSTheodore Ts'o /* Cleanup superblock name */ 30369f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 30379f6200bbSTheodore Ts'o *cp = '!'; 30389f6200bbSTheodore Ts'o 3039dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3040617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3041ac27a0ecSDave Kleikamp if (!blocksize) { 3042b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3043ac27a0ecSDave Kleikamp goto out_fail; 3044ac27a0ecSDave Kleikamp } 3045ac27a0ecSDave Kleikamp 3046ac27a0ecSDave Kleikamp /* 3047617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3048ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3049ac27a0ecSDave Kleikamp */ 3050617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 305170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 305270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3053ac27a0ecSDave Kleikamp } else { 305470bbb3e0SAndrew Morton logical_sb_block = sb_block; 3055ac27a0ecSDave Kleikamp } 3056ac27a0ecSDave Kleikamp 305770bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3058b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3059ac27a0ecSDave Kleikamp goto out_fail; 3060ac27a0ecSDave Kleikamp } 3061ac27a0ecSDave Kleikamp /* 3062ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3063617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3064ac27a0ecSDave Kleikamp */ 3065617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3066ac27a0ecSDave Kleikamp sbi->s_es = es; 3067ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3068617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3069617ba13bSMingming Cao goto cantfind_ext4; 3070afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3071ac27a0ecSDave Kleikamp 3072ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3073ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3074fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3075617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3076fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 3077437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3078437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3079437ca0fdSDmitry Monakhov "2.6.38"); 3080fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3081437ca0fdSDmitry Monakhov } 3082617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3083fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 308403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3085617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 3086fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 30872e7842b8SHugh Dickins #endif 308803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3089617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 3090fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 30912e7842b8SHugh Dickins #endif 3092617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3093fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3094617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3095fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3096617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3097fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3098ac27a0ecSDave Kleikamp 3099617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3100fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3101bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3102fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3103bb4f397aSAneesh Kumar K.V else 3104fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 31058b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3106fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 31078b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3108fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3109ac27a0ecSDave Kleikamp 3110ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3111ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 311230773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 311330773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 311430773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3115ac27a0ecSDave Kleikamp 31168b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3117fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3118ac27a0ecSDave Kleikamp 31191e2462f9SMingming Cao /* 3120dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3121dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3122dd919b98SAneesh Kumar K.V */ 31238b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 31248b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3125fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3126dd919b98SAneesh Kumar K.V 31278b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 31288b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 31298b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 31308b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 31318b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 31328b67f04aSTheodore Ts'o } 3133b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3134b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3135ac27a0ecSDave Kleikamp goto failed_mount; 3136ac27a0ecSDave Kleikamp 3137ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3138482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3139ac27a0ecSDave Kleikamp 3140617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3141617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3142617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3143617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3144b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3145b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3146b31e1552SEric Sandeen "running e2fsck is recommended"); 3147469108ffSTheodore Tso 3148469108ffSTheodore Tso /* 3149ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3150ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3151ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3152ac27a0ecSDave Kleikamp */ 3153a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3154ac27a0ecSDave Kleikamp goto failed_mount; 3155a13fb1a4SEric Sandeen 3156ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3157ac27a0ecSDave Kleikamp 3158617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3159617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3160b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3161b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3162ac27a0ecSDave Kleikamp goto failed_mount; 3163ac27a0ecSDave Kleikamp } 3164ac27a0ecSDave Kleikamp 3165ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3166ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3167ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3168b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3169ce40733cSAneesh Kumar K.V blocksize); 3170ac27a0ecSDave Kleikamp goto failed_mount; 3171ac27a0ecSDave Kleikamp } 3172ac27a0ecSDave Kleikamp 3173ac27a0ecSDave Kleikamp brelse(bh); 317470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 317570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 317670bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3177ac27a0ecSDave Kleikamp if (!bh) { 3178b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3179b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3180ac27a0ecSDave Kleikamp goto failed_mount; 3181ac27a0ecSDave Kleikamp } 3182617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3183ac27a0ecSDave Kleikamp sbi->s_es = es; 3184617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3185b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3186b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3187ac27a0ecSDave Kleikamp goto failed_mount; 3188ac27a0ecSDave Kleikamp } 3189ac27a0ecSDave Kleikamp } 3190ac27a0ecSDave Kleikamp 3191a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3192a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3193f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3194f287a1a5STheodore Ts'o has_huge_files); 3195f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3196ac27a0ecSDave Kleikamp 3197617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3198617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3199617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3200ac27a0ecSDave Kleikamp } else { 3201ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3202ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3203617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 32041330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3205ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3206b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3207b31e1552SEric Sandeen "unsupported inode size: %d", 3208ac27a0ecSDave Kleikamp sbi->s_inode_size); 3209ac27a0ecSDave Kleikamp goto failed_mount; 3210ac27a0ecSDave Kleikamp } 3211ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3212ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3213ac27a0ecSDave Kleikamp } 32140b8e58a1SAndreas Dilger 32150d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 32160d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 32178fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 32180d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3219d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3220b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3221b31e1552SEric Sandeen "unsupported descriptor size %lu", 32220d1ee42fSAlexandre Ratchov sbi->s_desc_size); 32230d1ee42fSAlexandre Ratchov goto failed_mount; 32240d1ee42fSAlexandre Ratchov } 32250d1ee42fSAlexandre Ratchov } else 32260d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 32270b8e58a1SAndreas Dilger 3228ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3229ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3230b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3231617ba13bSMingming Cao goto cantfind_ext4; 32320b8e58a1SAndreas Dilger 3233617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3234ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3235617ba13bSMingming Cao goto cantfind_ext4; 3236ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3237ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 32380d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3239ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3240ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3241e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3242e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 32430b8e58a1SAndreas Dilger 3244ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3245ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3246ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3247f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3248f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3249f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3250f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3251f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3252f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3253f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3254f99b2589STheodore Ts'o #else 3255f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3256f99b2589STheodore Ts'o #endif 3257f99b2589STheodore Ts'o sb->s_dirt = 1; 3258f99b2589STheodore Ts'o } 3259ac27a0ecSDave Kleikamp 3260ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3261b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3262b31e1552SEric Sandeen "#blocks per group too big: %lu", 3263ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3264ac27a0ecSDave Kleikamp goto failed_mount; 3265ac27a0ecSDave Kleikamp } 3266ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3267b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3268b31e1552SEric Sandeen "#inodes per group too big: %lu", 3269ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3270ac27a0ecSDave Kleikamp goto failed_mount; 3271ac27a0ecSDave Kleikamp } 3272ac27a0ecSDave Kleikamp 3273bf43d84bSEric Sandeen /* 3274bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3275bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3276bf43d84bSEric Sandeen */ 32775a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 327830ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 32795a9ae68aSDarrick J. Wong if (err) { 3280b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3281bf43d84bSEric Sandeen " too large to mount safely on this system"); 3282ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 328390c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 32845a9ae68aSDarrick J. Wong ret = err; 3285ac27a0ecSDave Kleikamp goto failed_mount; 3286ac27a0ecSDave Kleikamp } 3287ac27a0ecSDave Kleikamp 3288617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3289617ba13bSMingming Cao goto cantfind_ext4; 3290e7c95593SEric Sandeen 32910f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 32920f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 32930f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3294b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3295b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 32960f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 32970f2ddca6SFrom: Thiemo Nagel goto failed_mount; 32980f2ddca6SFrom: Thiemo Nagel } 32990f2ddca6SFrom: Thiemo Nagel 33004ec11028STheodore Ts'o /* 33014ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 33024ec11028STheodore Ts'o * of the filesystem. 33034ec11028STheodore Ts'o */ 33044ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3305b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 3306b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3307e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 33084ec11028STheodore Ts'o ext4_blocks_count(es)); 3309e7c95593SEric Sandeen goto failed_mount; 3310e7c95593SEric Sandeen } 3311bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3312bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3313bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3314bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 33154ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3316b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 33174ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3318b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 33194ec11028STheodore Ts'o ext4_blocks_count(es), 33204ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 33214ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 33224ec11028STheodore Ts'o goto failed_mount; 33234ec11028STheodore Ts'o } 3324bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3325fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3326fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3327617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3328617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3329ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 3330ac27a0ecSDave Kleikamp GFP_KERNEL); 3331ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3332b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3333ac27a0ecSDave Kleikamp goto failed_mount; 3334ac27a0ecSDave Kleikamp } 3335ac27a0ecSDave Kleikamp 33363244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 33379f6200bbSTheodore Ts'o if (ext4_proc_root) 33389f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 33393244fcb1SAlexander Beregalov #endif 3340240799cdSTheodore Ts'o 3341705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3342ac27a0ecSDave Kleikamp 3343ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 334470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3345ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3346ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3347b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3348b31e1552SEric Sandeen "can't read group descriptor %d", i); 3349ac27a0ecSDave Kleikamp db_count = i; 3350ac27a0ecSDave Kleikamp goto failed_mount2; 3351ac27a0ecSDave Kleikamp } 3352ac27a0ecSDave Kleikamp } 3353bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3354b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3355ac27a0ecSDave Kleikamp goto failed_mount2; 3356ac27a0ecSDave Kleikamp } 3357772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3358772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3359b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3360b31e1552SEric Sandeen "unable to initialize " 3361b31e1552SEric Sandeen "flex_bg meta info!"); 3362772cb7c8SJose R. Santos goto failed_mount2; 3363772cb7c8SJose R. Santos } 3364772cb7c8SJose R. Santos 3365ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3366ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3367ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3368ac27a0ecSDave Kleikamp 3369ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeblocks_counter, 3370ce7e010aSTheodore Ts'o ext4_count_free_blocks(sb)); 3371ce7e010aSTheodore Ts'o if (!err) { 3372ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3373ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3374ce7e010aSTheodore Ts'o } 3375ce7e010aSTheodore Ts'o if (!err) { 3376ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3377ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3378ce7e010aSTheodore Ts'o } 3379ce7e010aSTheodore Ts'o if (!err) { 3380ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 3381ce7e010aSTheodore Ts'o } 3382ce7e010aSTheodore Ts'o if (err) { 3383ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3384ce7e010aSTheodore Ts'o goto failed_mount3; 3385ce7e010aSTheodore Ts'o } 3386ce7e010aSTheodore Ts'o 3387c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 338855138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3389c9de560dSAlex Tomas 3390ac27a0ecSDave Kleikamp /* 3391ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3392ac27a0ecSDave Kleikamp */ 33939ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 33949ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3395617ba13bSMingming Cao sb->s_op = &ext4_sops; 33969ca92389STheodore Ts'o else 33979ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3398617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3399617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3400ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3401617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3402617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3403ac27a0ecSDave Kleikamp #endif 3404ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 34053b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 340632ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 3407ac27a0ecSDave Kleikamp 3408ac27a0ecSDave Kleikamp sb->s_root = NULL; 3409ac27a0ecSDave Kleikamp 3410ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3411617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3412617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3413ac27a0ecSDave Kleikamp 3414ac27a0ecSDave Kleikamp /* 3415ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3416ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3417ac27a0ecSDave Kleikamp */ 3418ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3419617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3420617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3421ac27a0ecSDave Kleikamp goto failed_mount3; 34220390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 34230390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3424b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3425b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3426744692dcSJiaying Zhang goto failed_mount_wq; 3427ac27a0ecSDave Kleikamp } else { 3428fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 3429fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 34300390131bSFrank Mayhar sbi->s_journal = NULL; 34310390131bSFrank Mayhar needs_recovery = 0; 34320390131bSFrank Mayhar goto no_journal; 3433ac27a0ecSDave Kleikamp } 3434ac27a0ecSDave Kleikamp 3435eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3436eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3437eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3438b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3439744692dcSJiaying Zhang goto failed_mount_wq; 3440eb40a09cSJose R. Santos } 3441eb40a09cSJose R. Santos 3442d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3443d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3444d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3445d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3446d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3447818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3448818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3449818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3450818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3451d4da6c9cSLinus Torvalds } else { 3452d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3453d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3454d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3455d4da6c9cSLinus Torvalds } 3456818d276cSGirish Shilamkar 3457ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3458ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3459ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3460ac27a0ecSDave Kleikamp case 0: 3461ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 346263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 346363f57933SAndrew Morton * cope, else JOURNAL_DATA 346463f57933SAndrew Morton */ 3465dab291afSMingming Cao if (jbd2_journal_check_available_features 3466dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3467fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3468ac27a0ecSDave Kleikamp else 3469fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3470ac27a0ecSDave Kleikamp break; 3471ac27a0ecSDave Kleikamp 3472617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3473617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3474dab291afSMingming Cao if (!jbd2_journal_check_available_features 3475dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3476b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3477b31e1552SEric Sandeen "requested data journaling mode"); 3478744692dcSJiaying Zhang goto failed_mount_wq; 3479ac27a0ecSDave Kleikamp } 3480ac27a0ecSDave Kleikamp default: 3481ac27a0ecSDave Kleikamp break; 3482ac27a0ecSDave Kleikamp } 3483b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3484ac27a0ecSDave Kleikamp 3485ce7e010aSTheodore Ts'o /* 3486ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3487ce7e010aSTheodore Ts'o * need to update the global counters. 3488ce7e010aSTheodore Ts'o */ 3489ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeblocks_counter, 349084061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 3491ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 349284061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3493ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 349484061e07SDmitry Monakhov ext4_count_dirs(sb)); 3495ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); 3496206f7ab4SChristoph Hellwig 3497ce7e010aSTheodore Ts'o no_journal: 34984c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 34994c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 35004c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 35014c0425ffSMingming Cao goto failed_mount_wq; 35024c0425ffSMingming Cao } 35034c0425ffSMingming Cao 3504ac27a0ecSDave Kleikamp /* 3505dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3506ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3507ac27a0ecSDave Kleikamp */ 3508ac27a0ecSDave Kleikamp 35091d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 35101d1fe1eeSDavid Howells if (IS_ERR(root)) { 3511b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 35121d1fe1eeSDavid Howells ret = PTR_ERR(root); 3513ac27a0ecSDave Kleikamp goto failed_mount4; 3514ac27a0ecSDave Kleikamp } 3515ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 35161d1fe1eeSDavid Howells iput(root); 3517b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3518ac27a0ecSDave Kleikamp goto failed_mount4; 3519ac27a0ecSDave Kleikamp } 35201d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 35211d1fe1eeSDavid Howells if (!sb->s_root) { 3522b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 35231d1fe1eeSDavid Howells iput(root); 35241d1fe1eeSDavid Howells ret = -ENOMEM; 35251d1fe1eeSDavid Howells goto failed_mount4; 35261d1fe1eeSDavid Howells } 3527ac27a0ecSDave Kleikamp 3528617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3529ef7f3835SKalpak Shah 3530ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3531ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3532ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3533ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3534ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3535ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3536ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3537ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3538ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3539ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3540ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3541ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3542ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3543ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3544ef7f3835SKalpak Shah } 3545ef7f3835SKalpak Shah } 3546ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3547ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3548ef7f3835SKalpak Shah sbi->s_inode_size) { 3549ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3550ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3551b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3552b31e1552SEric Sandeen "available"); 3553ef7f3835SKalpak Shah } 3554ef7f3835SKalpak Shah 355590576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 355690576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 3557b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 3558b31e1552SEric Sandeen "requested data journaling mode"); 3559fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 356090576c0bSTheodore Ts'o } 3561744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 3562744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 3563744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3564744692dcSJiaying Zhang "option - requested data journaling mode"); 3565fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3566744692dcSJiaying Zhang } 3567744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 3568744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3569744692dcSJiaying Zhang "option - block size is too small"); 3570fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3571744692dcSJiaying Zhang } 3572744692dcSJiaying Zhang } 3573c2774d84SAneesh Kumar K.V 35746fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 35756fd058f7STheodore Ts'o if (err) { 3576b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3577fbe845ddSCurt Wohlgemuth "zone (%d)", err); 35786fd058f7STheodore Ts'o goto failed_mount4; 35796fd058f7STheodore Ts'o } 35806fd058f7STheodore Ts'o 3581c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3582c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3583c2774d84SAneesh Kumar K.V if (err) { 3584421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3585c2774d84SAneesh Kumar K.V err); 3586c2774d84SAneesh Kumar K.V goto failed_mount4; 3587c2774d84SAneesh Kumar K.V } 3588c2774d84SAneesh Kumar K.V 3589bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3590bfff6873SLukas Czerner if (err) 3591bfff6873SLukas Czerner goto failed_mount4; 3592bfff6873SLukas Czerner 35933197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 35943197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 35953197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 35963197ebdbSTheodore Ts'o "%s", sb->s_id); 35973197ebdbSTheodore Ts'o if (err) { 35983197ebdbSTheodore Ts'o ext4_mb_release(sb); 35993197ebdbSTheodore Ts'o ext4_ext_release(sb); 36003197ebdbSTheodore Ts'o goto failed_mount4; 36013197ebdbSTheodore Ts'o }; 36023197ebdbSTheodore Ts'o 3603617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3604617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3605617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 36060390131bSFrank Mayhar if (needs_recovery) { 3607b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3608617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 36090390131bSFrank Mayhar } 36100390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 36110390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 36120390131bSFrank Mayhar descr = " journalled data mode"; 36130390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 36140390131bSFrank Mayhar descr = " ordered data mode"; 36150390131bSFrank Mayhar else 36160390131bSFrank Mayhar descr = " writeback data mode"; 36170390131bSFrank Mayhar } else 36180390131bSFrank Mayhar descr = "out journal"; 36190390131bSFrank Mayhar 3620d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 36218b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 36228b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3623ac27a0ecSDave Kleikamp 362466e61a9eSTheodore Ts'o init_timer(&sbi->s_err_report); 362566e61a9eSTheodore Ts'o sbi->s_err_report.function = print_daily_error_info; 362666e61a9eSTheodore Ts'o sbi->s_err_report.data = (unsigned long) sb; 362766e61a9eSTheodore Ts'o if (es->s_error_count) 362866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3629ac27a0ecSDave Kleikamp 3630d4c402d9SCurt Wohlgemuth kfree(orig_data); 3631ac27a0ecSDave Kleikamp return 0; 3632ac27a0ecSDave Kleikamp 3633617ba13bSMingming Cao cantfind_ext4: 3634ac27a0ecSDave Kleikamp if (!silent) 3635b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3636ac27a0ecSDave Kleikamp goto failed_mount; 3637ac27a0ecSDave Kleikamp 3638ac27a0ecSDave Kleikamp failed_mount4: 3639b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 36404c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 36414c0425ffSMingming Cao failed_mount_wq: 36426fd058f7STheodore Ts'o ext4_release_system_zone(sb); 36430390131bSFrank Mayhar if (sbi->s_journal) { 3644dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 364547b4a50bSJan Kara sbi->s_journal = NULL; 36460390131bSFrank Mayhar } 3647ac27a0ecSDave Kleikamp failed_mount3: 3648c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3649c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3650c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3651c5ca7c76STheodore Ts'o else 3652c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3653c5ca7c76STheodore Ts'o } 3654ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeblocks_counter); 3655ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3656ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 3657ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3658ac27a0ecSDave Kleikamp failed_mount2: 3659ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3660ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3661ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3662ac27a0ecSDave Kleikamp failed_mount: 3663240799cdSTheodore Ts'o if (sbi->s_proc) { 36649f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3665240799cdSTheodore Ts'o } 3666ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3667ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3668ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3669ac27a0ecSDave Kleikamp #endif 3670617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3671ac27a0ecSDave Kleikamp brelse(bh); 3672ac27a0ecSDave Kleikamp out_fail: 3673ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3674f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3675ac27a0ecSDave Kleikamp kfree(sbi); 3676dcc7dae3SCyrill Gorcunov out_free_orig: 3677d4c402d9SCurt Wohlgemuth kfree(orig_data); 36781d1fe1eeSDavid Howells return ret; 3679ac27a0ecSDave Kleikamp } 3680ac27a0ecSDave Kleikamp 3681ac27a0ecSDave Kleikamp /* 3682ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3683ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3684ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3685ac27a0ecSDave Kleikamp */ 3686617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3687ac27a0ecSDave Kleikamp { 3688617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3689ac27a0ecSDave Kleikamp 3690ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 369130773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 369230773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3693ac27a0ecSDave Kleikamp 3694a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3695ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3696dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3697ac27a0ecSDave Kleikamp else 3698dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 36995bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 37005bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 37015bf5683aSHidehiro Kawai else 37025bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3703a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3704ac27a0ecSDave Kleikamp } 3705ac27a0ecSDave Kleikamp 3706617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3707ac27a0ecSDave Kleikamp unsigned int journal_inum) 3708ac27a0ecSDave Kleikamp { 3709ac27a0ecSDave Kleikamp struct inode *journal_inode; 3710ac27a0ecSDave Kleikamp journal_t *journal; 3711ac27a0ecSDave Kleikamp 37120390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37130390131bSFrank Mayhar 3714ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3715ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3716ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3717ac27a0ecSDave Kleikamp 37181d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 37191d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3720b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3721ac27a0ecSDave Kleikamp return NULL; 3722ac27a0ecSDave Kleikamp } 3723ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3724ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3725ac27a0ecSDave Kleikamp iput(journal_inode); 3726b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3727ac27a0ecSDave Kleikamp return NULL; 3728ac27a0ecSDave Kleikamp } 3729ac27a0ecSDave Kleikamp 3730e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3731ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 37321d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3733b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3734ac27a0ecSDave Kleikamp iput(journal_inode); 3735ac27a0ecSDave Kleikamp return NULL; 3736ac27a0ecSDave Kleikamp } 3737ac27a0ecSDave Kleikamp 3738dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3739ac27a0ecSDave Kleikamp if (!journal) { 3740b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3741ac27a0ecSDave Kleikamp iput(journal_inode); 3742ac27a0ecSDave Kleikamp return NULL; 3743ac27a0ecSDave Kleikamp } 3744ac27a0ecSDave Kleikamp journal->j_private = sb; 3745617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3746ac27a0ecSDave Kleikamp return journal; 3747ac27a0ecSDave Kleikamp } 3748ac27a0ecSDave Kleikamp 3749617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3750ac27a0ecSDave Kleikamp dev_t j_dev) 3751ac27a0ecSDave Kleikamp { 3752ac27a0ecSDave Kleikamp struct buffer_head *bh; 3753ac27a0ecSDave Kleikamp journal_t *journal; 3754617ba13bSMingming Cao ext4_fsblk_t start; 3755617ba13bSMingming Cao ext4_fsblk_t len; 3756ac27a0ecSDave Kleikamp int hblock, blocksize; 3757617ba13bSMingming Cao ext4_fsblk_t sb_block; 3758ac27a0ecSDave Kleikamp unsigned long offset; 3759617ba13bSMingming Cao struct ext4_super_block *es; 3760ac27a0ecSDave Kleikamp struct block_device *bdev; 3761ac27a0ecSDave Kleikamp 37620390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37630390131bSFrank Mayhar 3764b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3765ac27a0ecSDave Kleikamp if (bdev == NULL) 3766ac27a0ecSDave Kleikamp return NULL; 3767ac27a0ecSDave Kleikamp 3768ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3769b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3770b31e1552SEric Sandeen "failed to claim external journal device"); 37719a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3772ac27a0ecSDave Kleikamp return NULL; 3773ac27a0ecSDave Kleikamp } 3774ac27a0ecSDave Kleikamp 3775ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3776e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3777ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3778b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3779b31e1552SEric Sandeen "blocksize too small for journal device"); 3780ac27a0ecSDave Kleikamp goto out_bdev; 3781ac27a0ecSDave Kleikamp } 3782ac27a0ecSDave Kleikamp 3783617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3784617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3785ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3786ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3787b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3788b31e1552SEric Sandeen "external journal"); 3789ac27a0ecSDave Kleikamp goto out_bdev; 3790ac27a0ecSDave Kleikamp } 3791ac27a0ecSDave Kleikamp 3792617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3793617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3794ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3795617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3797b31e1552SEric Sandeen "bad superblock"); 3798ac27a0ecSDave Kleikamp brelse(bh); 3799ac27a0ecSDave Kleikamp goto out_bdev; 3800ac27a0ecSDave Kleikamp } 3801ac27a0ecSDave Kleikamp 3802617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3803b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3804ac27a0ecSDave Kleikamp brelse(bh); 3805ac27a0ecSDave Kleikamp goto out_bdev; 3806ac27a0ecSDave Kleikamp } 3807ac27a0ecSDave Kleikamp 3808bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3809ac27a0ecSDave Kleikamp start = sb_block + 1; 3810ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3811ac27a0ecSDave Kleikamp 3812dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3813ac27a0ecSDave Kleikamp start, len, blocksize); 3814ac27a0ecSDave Kleikamp if (!journal) { 3815b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3816ac27a0ecSDave Kleikamp goto out_bdev; 3817ac27a0ecSDave Kleikamp } 3818ac27a0ecSDave Kleikamp journal->j_private = sb; 3819ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3820ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3821ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3822b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3823ac27a0ecSDave Kleikamp goto out_journal; 3824ac27a0ecSDave Kleikamp } 3825ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3826b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3827b31e1552SEric Sandeen "user (unsupported) - %d", 3828ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3829ac27a0ecSDave Kleikamp goto out_journal; 3830ac27a0ecSDave Kleikamp } 3831617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3832617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3833ac27a0ecSDave Kleikamp return journal; 38340b8e58a1SAndreas Dilger 3835ac27a0ecSDave Kleikamp out_journal: 3836dab291afSMingming Cao jbd2_journal_destroy(journal); 3837ac27a0ecSDave Kleikamp out_bdev: 3838617ba13bSMingming Cao ext4_blkdev_put(bdev); 3839ac27a0ecSDave Kleikamp return NULL; 3840ac27a0ecSDave Kleikamp } 3841ac27a0ecSDave Kleikamp 3842617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3843617ba13bSMingming Cao struct ext4_super_block *es, 3844ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3845ac27a0ecSDave Kleikamp { 3846ac27a0ecSDave Kleikamp journal_t *journal; 3847ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3848ac27a0ecSDave Kleikamp dev_t journal_dev; 3849ac27a0ecSDave Kleikamp int err = 0; 3850ac27a0ecSDave Kleikamp int really_read_only; 3851ac27a0ecSDave Kleikamp 38520390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38530390131bSFrank Mayhar 3854ac27a0ecSDave Kleikamp if (journal_devnum && 3855ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3856b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3857b31e1552SEric Sandeen "numbers have changed"); 3858ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3859ac27a0ecSDave Kleikamp } else 3860ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3861ac27a0ecSDave Kleikamp 3862ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3863ac27a0ecSDave Kleikamp 3864ac27a0ecSDave Kleikamp /* 3865ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3866ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3867ac27a0ecSDave Kleikamp * can get read-write access to the device. 3868ac27a0ecSDave Kleikamp */ 3869617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3870ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3871b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3872b31e1552SEric Sandeen "required on readonly filesystem"); 3873ac27a0ecSDave Kleikamp if (really_read_only) { 3874b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3875b31e1552SEric Sandeen "unavailable, cannot proceed"); 3876ac27a0ecSDave Kleikamp return -EROFS; 3877ac27a0ecSDave Kleikamp } 3878b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3879b31e1552SEric Sandeen "be enabled during recovery"); 3880ac27a0ecSDave Kleikamp } 3881ac27a0ecSDave Kleikamp } 3882ac27a0ecSDave Kleikamp 3883ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3884b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3885b31e1552SEric Sandeen "and inode journals!"); 3886ac27a0ecSDave Kleikamp return -EINVAL; 3887ac27a0ecSDave Kleikamp } 3888ac27a0ecSDave Kleikamp 3889ac27a0ecSDave Kleikamp if (journal_inum) { 3890617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3891ac27a0ecSDave Kleikamp return -EINVAL; 3892ac27a0ecSDave Kleikamp } else { 3893617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3894ac27a0ecSDave Kleikamp return -EINVAL; 3895ac27a0ecSDave Kleikamp } 3896ac27a0ecSDave Kleikamp 389790576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3898b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 38994776004fSTheodore Ts'o 3900ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3901dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3902ac27a0ecSDave Kleikamp if (err) { 3903b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3904dab291afSMingming Cao jbd2_journal_destroy(journal); 3905ac27a0ecSDave Kleikamp return err; 3906ac27a0ecSDave Kleikamp } 3907ac27a0ecSDave Kleikamp } 3908ac27a0ecSDave Kleikamp 3909617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3910dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 39111c13d5c0STheodore Ts'o if (!err) { 39121c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 39131c13d5c0STheodore Ts'o if (save) 39141c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 39151c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 3916dab291afSMingming Cao err = jbd2_journal_load(journal); 39171c13d5c0STheodore Ts'o if (save) 39181c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 39191c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 39201c13d5c0STheodore Ts'o kfree(save); 39211c13d5c0STheodore Ts'o } 3922ac27a0ecSDave Kleikamp 3923ac27a0ecSDave Kleikamp if (err) { 3924b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3925dab291afSMingming Cao jbd2_journal_destroy(journal); 3926ac27a0ecSDave Kleikamp return err; 3927ac27a0ecSDave Kleikamp } 3928ac27a0ecSDave Kleikamp 3929617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3930617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3931ac27a0ecSDave Kleikamp 3932c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 3933ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3934ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3935ac27a0ecSDave Kleikamp 3936ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3937e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3938ac27a0ecSDave Kleikamp } 3939ac27a0ecSDave Kleikamp 3940ac27a0ecSDave Kleikamp return 0; 3941ac27a0ecSDave Kleikamp } 3942ac27a0ecSDave Kleikamp 3943e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3944ac27a0ecSDave Kleikamp { 3945e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3946617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3947c4be0c1dSTakashi Sato int error = 0; 3948ac27a0ecSDave Kleikamp 3949ac27a0ecSDave Kleikamp if (!sbh) 3950c4be0c1dSTakashi Sato return error; 3951914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3952914258bfSTheodore Ts'o /* 3953914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3954914258bfSTheodore Ts'o * superblock failed. This could happen because the 3955914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3956914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3957914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3958914258bfSTheodore Ts'o * write and hope for the best. 3959914258bfSTheodore Ts'o */ 3960b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3961b31e1552SEric Sandeen "superblock detected"); 3962914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3963914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3964914258bfSTheodore Ts'o } 396571290b36STheodore Ts'o /* 396671290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 396771290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 396871290b36STheodore Ts'o * write time when we are mounting the root file system 396971290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 397071290b36STheodore Ts'o * for people who are east of GMT and who make their clock 397171290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 397271290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 397371290b36STheodore Ts'o * to complain and force a full file system check. 397471290b36STheodore Ts'o */ 397571290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3976ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3977f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3978afc32f7eSTheodore Ts'o es->s_kbytes_written = 3979afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3980afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3981afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 3982f613dfcbSTheodore Ts'o else 3983f613dfcbSTheodore Ts'o es->s_kbytes_written = 3984f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 39855d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 39865d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 39877f93cff9STheodore Ts'o es->s_free_inodes_count = 39887f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 39895d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 39907234ab2aSTheodore Ts'o sb->s_dirt = 0; 3991ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3992ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3993914258bfSTheodore Ts'o if (sync) { 3994c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3995c4be0c1dSTakashi Sato if (error) 3996c4be0c1dSTakashi Sato return error; 3997c4be0c1dSTakashi Sato 3998c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3999c4be0c1dSTakashi Sato if (error) { 4000b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4001b31e1552SEric Sandeen "superblock"); 4002914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4003914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4004914258bfSTheodore Ts'o } 4005914258bfSTheodore Ts'o } 4006c4be0c1dSTakashi Sato return error; 4007ac27a0ecSDave Kleikamp } 4008ac27a0ecSDave Kleikamp 4009ac27a0ecSDave Kleikamp /* 4010ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4011ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4012ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4013ac27a0ecSDave Kleikamp */ 4014617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4015617ba13bSMingming Cao struct ext4_super_block *es) 4016ac27a0ecSDave Kleikamp { 4017617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4018ac27a0ecSDave Kleikamp 40190390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 40200390131bSFrank Mayhar BUG_ON(journal != NULL); 40210390131bSFrank Mayhar return; 40220390131bSFrank Mayhar } 4023dab291afSMingming Cao jbd2_journal_lock_updates(journal); 40247ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 40257ffe1ea8SHidehiro Kawai goto out; 40267ffe1ea8SHidehiro Kawai 4027617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4028ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4029617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4030e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4031ac27a0ecSDave Kleikamp } 40327ffe1ea8SHidehiro Kawai 40337ffe1ea8SHidehiro Kawai out: 4034dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4035ac27a0ecSDave Kleikamp } 4036ac27a0ecSDave Kleikamp 4037ac27a0ecSDave Kleikamp /* 4038ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4039ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4040ac27a0ecSDave Kleikamp * main filesystem now. 4041ac27a0ecSDave Kleikamp */ 4042617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4043617ba13bSMingming Cao struct ext4_super_block *es) 4044ac27a0ecSDave Kleikamp { 4045ac27a0ecSDave Kleikamp journal_t *journal; 4046ac27a0ecSDave Kleikamp int j_errno; 4047ac27a0ecSDave Kleikamp const char *errstr; 4048ac27a0ecSDave Kleikamp 40490390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40500390131bSFrank Mayhar 4051617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4052ac27a0ecSDave Kleikamp 4053ac27a0ecSDave Kleikamp /* 4054ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4055617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4056ac27a0ecSDave Kleikamp */ 4057ac27a0ecSDave Kleikamp 4058dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4059ac27a0ecSDave Kleikamp if (j_errno) { 4060ac27a0ecSDave Kleikamp char nbuf[16]; 4061ac27a0ecSDave Kleikamp 4062617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 406312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4064ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 406512062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4066ac27a0ecSDave Kleikamp 4067617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4068617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4069e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4070ac27a0ecSDave Kleikamp 4071dab291afSMingming Cao jbd2_journal_clear_err(journal); 4072ac27a0ecSDave Kleikamp } 4073ac27a0ecSDave Kleikamp } 4074ac27a0ecSDave Kleikamp 4075ac27a0ecSDave Kleikamp /* 4076ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4077ac27a0ecSDave Kleikamp * and wait on the commit. 4078ac27a0ecSDave Kleikamp */ 4079617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4080ac27a0ecSDave Kleikamp { 4081ac27a0ecSDave Kleikamp journal_t *journal; 40820390131bSFrank Mayhar int ret = 0; 4083ac27a0ecSDave Kleikamp 4084ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4085ac27a0ecSDave Kleikamp return 0; 4086ac27a0ecSDave Kleikamp 4087617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 40886b0310fbSEric Sandeen if (journal) { 4089437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4090617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 40916b0310fbSEric Sandeen } 40920390131bSFrank Mayhar 4093ac27a0ecSDave Kleikamp return ret; 4094ac27a0ecSDave Kleikamp } 4095ac27a0ecSDave Kleikamp 4096617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4097ac27a0ecSDave Kleikamp { 4098ebc1ac16SChristoph Hellwig lock_super(sb); 4099e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4100ebc1ac16SChristoph Hellwig unlock_super(sb); 41010390131bSFrank Mayhar } 4102ac27a0ecSDave Kleikamp 4103617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4104ac27a0ecSDave Kleikamp { 410514ce0cb4STheodore Ts'o int ret = 0; 41069eddacf9SJan Kara tid_t target; 41078d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4108ac27a0ecSDave Kleikamp 41099bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 41108d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 41118d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4112ac27a0ecSDave Kleikamp if (wait) 41138d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 41140390131bSFrank Mayhar } 411514ce0cb4STheodore Ts'o return ret; 4116ac27a0ecSDave Kleikamp } 4117ac27a0ecSDave Kleikamp 4118ac27a0ecSDave Kleikamp /* 4119ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4120ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4121ac27a0ecSDave Kleikamp */ 4122c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4123ac27a0ecSDave Kleikamp { 4124c4be0c1dSTakashi Sato int error = 0; 4125c4be0c1dSTakashi Sato journal_t *journal; 4126ac27a0ecSDave Kleikamp 41279ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41289ca92389STheodore Ts'o return 0; 41299ca92389STheodore Ts'o 4130c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4131ac27a0ecSDave Kleikamp 4132ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4133dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41347ffe1ea8SHidehiro Kawai 41357ffe1ea8SHidehiro Kawai /* 41369ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 41379ca92389STheodore Ts'o * the journal. 41387ffe1ea8SHidehiro Kawai */ 4139c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 41406b0310fbSEric Sandeen if (error < 0) 41416b0310fbSEric Sandeen goto out; 4142ac27a0ecSDave Kleikamp 4143ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4144617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4145e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 41466b0310fbSEric Sandeen out: 41476b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 41486b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 41496b0310fbSEric Sandeen return error; 4150ac27a0ecSDave Kleikamp } 4151ac27a0ecSDave Kleikamp 4152ac27a0ecSDave Kleikamp /* 4153ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4154ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4155ac27a0ecSDave Kleikamp */ 4156c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4157ac27a0ecSDave Kleikamp { 41589ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41599ca92389STheodore Ts'o return 0; 41609ca92389STheodore Ts'o 4161ac27a0ecSDave Kleikamp lock_super(sb); 41629ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4163617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4164e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4165ac27a0ecSDave Kleikamp unlock_super(sb); 4166c4be0c1dSTakashi Sato return 0; 4167ac27a0ecSDave Kleikamp } 4168ac27a0ecSDave Kleikamp 4169*673c6100STheodore Ts'o /* 4170*673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4171*673c6100STheodore Ts'o */ 4172*673c6100STheodore Ts'o struct ext4_mount_options { 4173*673c6100STheodore Ts'o unsigned long s_mount_opt; 4174*673c6100STheodore Ts'o uid_t s_resuid; 4175*673c6100STheodore Ts'o gid_t s_resgid; 4176*673c6100STheodore Ts'o unsigned long s_commit_interval; 4177*673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4178*673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4179*673c6100STheodore Ts'o int s_jquota_fmt; 4180*673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4181*673c6100STheodore Ts'o #endif 4182*673c6100STheodore Ts'o }; 4183*673c6100STheodore Ts'o 4184617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4185ac27a0ecSDave Kleikamp { 4186617ba13bSMingming Cao struct ext4_super_block *es; 4187617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4188617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4189ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4190617ba13bSMingming Cao struct ext4_mount_options old_opts; 4191c79d967dSChristoph Hellwig int enable_quota = 0; 41928a266467STheodore Ts'o ext4_group_t g; 4193b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4194ac27a0ecSDave Kleikamp int err; 4195ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4196ac27a0ecSDave Kleikamp int i; 4197ac27a0ecSDave Kleikamp #endif 4198d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4199ac27a0ecSDave Kleikamp 4200ac27a0ecSDave Kleikamp /* Store the original options */ 4201bbd6851aSAl Viro lock_super(sb); 4202ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4203ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4204ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4205ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4206ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 420730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 420830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4209ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4210ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4211ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4212ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4213ac27a0ecSDave Kleikamp #endif 4214b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4215b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4216ac27a0ecSDave Kleikamp 4217ac27a0ecSDave Kleikamp /* 4218ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4219ac27a0ecSDave Kleikamp */ 4220b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4221b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4222ac27a0ecSDave Kleikamp err = -EINVAL; 4223ac27a0ecSDave Kleikamp goto restore_opts; 4224ac27a0ecSDave Kleikamp } 4225ac27a0ecSDave Kleikamp 42264ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4227c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4228ac27a0ecSDave Kleikamp 4229ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4230482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4231ac27a0ecSDave Kleikamp 4232ac27a0ecSDave Kleikamp es = sbi->s_es; 4233ac27a0ecSDave Kleikamp 4234b3881f74STheodore Ts'o if (sbi->s_journal) { 4235617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4236b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4237b3881f74STheodore Ts'o } 4238ac27a0ecSDave Kleikamp 4239ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4240bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 42414ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4242ac27a0ecSDave Kleikamp err = -EROFS; 4243ac27a0ecSDave Kleikamp goto restore_opts; 4244ac27a0ecSDave Kleikamp } 4245ac27a0ecSDave Kleikamp 4246ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 42470f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 42480f0dd62fSChristoph Hellwig if (err < 0) 4249c79d967dSChristoph Hellwig goto restore_opts; 4250c79d967dSChristoph Hellwig 4251ac27a0ecSDave Kleikamp /* 4252ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4253ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4254ac27a0ecSDave Kleikamp */ 4255ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4256ac27a0ecSDave Kleikamp 4257ac27a0ecSDave Kleikamp /* 4258ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4259ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4260ac27a0ecSDave Kleikamp * mark the partition as valid again. 4261ac27a0ecSDave Kleikamp */ 4262617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4263617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4264ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4265ac27a0ecSDave Kleikamp 4266a63c9eb2STheodore Ts'o if (sbi->s_journal) 4267617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4268ac27a0ecSDave Kleikamp } else { 4269a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4270a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4271ac27a0ecSDave Kleikamp err = -EROFS; 4272ac27a0ecSDave Kleikamp goto restore_opts; 4273ac27a0ecSDave Kleikamp } 4274ead6596bSEric Sandeen /* 42758a266467STheodore Ts'o * Make sure the group descriptor checksums 42760b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 42778a266467STheodore Ts'o */ 42788a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 42798a266467STheodore Ts'o struct ext4_group_desc *gdp = 42808a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 42818a266467STheodore Ts'o 42828a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4283b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4284b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 42858a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 42868a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 42878a266467STheodore Ts'o err = -EINVAL; 42888a266467STheodore Ts'o goto restore_opts; 42898a266467STheodore Ts'o } 42908a266467STheodore Ts'o } 42918a266467STheodore Ts'o 42928a266467STheodore Ts'o /* 4293ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4294ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4295ead6596bSEric Sandeen * require a full umount/remount for now. 4296ead6596bSEric Sandeen */ 4297ead6596bSEric Sandeen if (es->s_last_orphan) { 4298b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4299ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4300ead6596bSEric Sandeen "orphan inode list. Please " 4301b31e1552SEric Sandeen "umount/remount instead"); 4302ead6596bSEric Sandeen err = -EINVAL; 4303ead6596bSEric Sandeen goto restore_opts; 4304ead6596bSEric Sandeen } 4305ead6596bSEric Sandeen 4306ac27a0ecSDave Kleikamp /* 4307ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4308ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4309ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4310ac27a0ecSDave Kleikamp * the partition.) 4311ac27a0ecSDave Kleikamp */ 43120390131bSFrank Mayhar if (sbi->s_journal) 4313617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4314ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4315617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4316ac27a0ecSDave Kleikamp goto restore_opts; 4317617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4318ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4319c79d967dSChristoph Hellwig enable_quota = 1; 4320ac27a0ecSDave Kleikamp } 4321ac27a0ecSDave Kleikamp } 4322bfff6873SLukas Czerner 4323bfff6873SLukas Czerner /* 4324bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4325bfff6873SLukas Czerner * current settings 4326bfff6873SLukas Czerner */ 4327bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4328bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4329bfff6873SLukas Czerner else { 4330bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4331bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4332bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4333bfff6873SLukas Czerner } 4334bfff6873SLukas Czerner 43356fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 43360390131bSFrank Mayhar if (sbi->s_journal == NULL) 4337e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 43380390131bSFrank Mayhar 4339ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4340ac27a0ecSDave Kleikamp /* Release old quota file names */ 4341ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4342ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4343ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4344ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4345ac27a0ecSDave Kleikamp #endif 4346bbd6851aSAl Viro unlock_super(sb); 4347c79d967dSChristoph Hellwig if (enable_quota) 43480f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4349d4c402d9SCurt Wohlgemuth 4350d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4351d4c402d9SCurt Wohlgemuth kfree(orig_data); 4352ac27a0ecSDave Kleikamp return 0; 43530b8e58a1SAndreas Dilger 4354ac27a0ecSDave Kleikamp restore_opts: 4355ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4356ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4357ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4358ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4359ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 436030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 436130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4362ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4363ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4364ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4365ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4366ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4367ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4368ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4369ac27a0ecSDave Kleikamp } 4370ac27a0ecSDave Kleikamp #endif 4371bbd6851aSAl Viro unlock_super(sb); 4372d4c402d9SCurt Wohlgemuth kfree(orig_data); 4373ac27a0ecSDave Kleikamp return err; 4374ac27a0ecSDave Kleikamp } 4375ac27a0ecSDave Kleikamp 4376617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4377ac27a0ecSDave Kleikamp { 4378ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4379617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4380617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4381960cc398SPekka Enberg u64 fsid; 4382ac27a0ecSDave Kleikamp 43835e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 43845e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 43856bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 43868df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 43875e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4388ac27a0ecSDave Kleikamp 4389ac27a0ecSDave Kleikamp /* 43905e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 43915e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 43925e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4393ac27a0ecSDave Kleikamp */ 4394ac27a0ecSDave Kleikamp 4395ac27a0ecSDave Kleikamp /* 4396ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4397ac27a0ecSDave Kleikamp * overhead 4398ac27a0ecSDave Kleikamp */ 4399ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 4400ac27a0ecSDave Kleikamp 4401ac27a0ecSDave Kleikamp /* 4402ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 4403ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 4404ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 4405ac27a0ecSDave Kleikamp */ 4406ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4407617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 4408617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 4409ac27a0ecSDave Kleikamp cond_resched(); 4410ac27a0ecSDave Kleikamp } 4411ac27a0ecSDave Kleikamp 4412ac27a0ecSDave Kleikamp /* 4413ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 4414ac27a0ecSDave Kleikamp * bitmap, and an inode table. 4415ac27a0ecSDave Kleikamp */ 44165e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 44175e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 44185e70030dSBadari Pulavarty smp_wmb(); 44196bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4420ac27a0ecSDave Kleikamp } 4421ac27a0ecSDave Kleikamp 4422617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4423ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 44245e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 44256bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 44266bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 4427bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4428bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4429ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4430ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 443152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4432617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4433960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4434960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4435960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4436960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 44370b8e58a1SAndreas Dilger 4438ac27a0ecSDave Kleikamp return 0; 4439ac27a0ecSDave Kleikamp } 4440ac27a0ecSDave Kleikamp 44410b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 44420b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4443ac27a0ecSDave Kleikamp * Process 1 Process 2 4444617ba13bSMingming Cao * ext4_create() quota_sync() 4445dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4446871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4447dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4448ac27a0ecSDave Kleikamp * 4449ac27a0ecSDave Kleikamp */ 4450ac27a0ecSDave Kleikamp 4451ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4452ac27a0ecSDave Kleikamp 4453ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4454ac27a0ecSDave Kleikamp { 4455ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4456ac27a0ecSDave Kleikamp } 4457ac27a0ecSDave Kleikamp 4458617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4459ac27a0ecSDave Kleikamp { 4460ac27a0ecSDave Kleikamp int ret, err; 4461ac27a0ecSDave Kleikamp handle_t *handle; 4462ac27a0ecSDave Kleikamp struct inode *inode; 4463ac27a0ecSDave Kleikamp 4464ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4465617ba13bSMingming Cao handle = ext4_journal_start(inode, 4466617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4467ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4468ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4469ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4470617ba13bSMingming Cao err = ext4_journal_stop(handle); 4471ac27a0ecSDave Kleikamp if (!ret) 4472ac27a0ecSDave Kleikamp ret = err; 4473ac27a0ecSDave Kleikamp return ret; 4474ac27a0ecSDave Kleikamp } 4475ac27a0ecSDave Kleikamp 4476617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4477ac27a0ecSDave Kleikamp { 4478ac27a0ecSDave Kleikamp int ret, err; 4479ac27a0ecSDave Kleikamp handle_t *handle; 4480ac27a0ecSDave Kleikamp 4481617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4482617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4483ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4484ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4485ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4486617ba13bSMingming Cao err = ext4_journal_stop(handle); 4487ac27a0ecSDave Kleikamp if (!ret) 4488ac27a0ecSDave Kleikamp ret = err; 4489ac27a0ecSDave Kleikamp return ret; 4490ac27a0ecSDave Kleikamp } 4491ac27a0ecSDave Kleikamp 4492617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4493ac27a0ecSDave Kleikamp { 4494ac27a0ecSDave Kleikamp int ret, err; 4495ac27a0ecSDave Kleikamp handle_t *handle; 4496ac27a0ecSDave Kleikamp 4497617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4498617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 44999c3013e9SJan Kara if (IS_ERR(handle)) { 45009c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 45019c3013e9SJan Kara dquot_release(dquot); 4502ac27a0ecSDave Kleikamp return PTR_ERR(handle); 45039c3013e9SJan Kara } 4504ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4505617ba13bSMingming Cao err = ext4_journal_stop(handle); 4506ac27a0ecSDave Kleikamp if (!ret) 4507ac27a0ecSDave Kleikamp ret = err; 4508ac27a0ecSDave Kleikamp return ret; 4509ac27a0ecSDave Kleikamp } 4510ac27a0ecSDave Kleikamp 4511617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4512ac27a0ecSDave Kleikamp { 45132c8be6b2SJan Kara /* Are we journaling quotas? */ 4514617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4515617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4516ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4517617ba13bSMingming Cao return ext4_write_dquot(dquot); 4518ac27a0ecSDave Kleikamp } else { 4519ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4520ac27a0ecSDave Kleikamp } 4521ac27a0ecSDave Kleikamp } 4522ac27a0ecSDave Kleikamp 4523617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4524ac27a0ecSDave Kleikamp { 4525ac27a0ecSDave Kleikamp int ret, err; 4526ac27a0ecSDave Kleikamp handle_t *handle; 4527ac27a0ecSDave Kleikamp 4528ac27a0ecSDave Kleikamp /* Data block + inode block */ 4529617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4530ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4531ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4532ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4533617ba13bSMingming Cao err = ext4_journal_stop(handle); 4534ac27a0ecSDave Kleikamp if (!ret) 4535ac27a0ecSDave Kleikamp ret = err; 4536ac27a0ecSDave Kleikamp return ret; 4537ac27a0ecSDave Kleikamp } 4538ac27a0ecSDave Kleikamp 4539ac27a0ecSDave Kleikamp /* 4540ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4541ac27a0ecSDave Kleikamp * the quota file and such... 4542ac27a0ecSDave Kleikamp */ 4543617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4544ac27a0ecSDave Kleikamp { 4545287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4546617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4547ac27a0ecSDave Kleikamp } 4548ac27a0ecSDave Kleikamp 4549ac27a0ecSDave Kleikamp /* 4550ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4551ac27a0ecSDave Kleikamp */ 4552617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4553307ae18aSChristoph Hellwig char *name) 4554ac27a0ecSDave Kleikamp { 4555ac27a0ecSDave Kleikamp int err; 45568264613dSAl Viro struct path path; 4557ac27a0ecSDave Kleikamp 4558ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4559ac27a0ecSDave Kleikamp return -EINVAL; 45600623543bSJan Kara 45618264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 4562ac27a0ecSDave Kleikamp if (err) 4563ac27a0ecSDave Kleikamp return err; 45640623543bSJan Kara 4565ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 45668264613dSAl Viro if (path.mnt->mnt_sb != sb) { 45678264613dSAl Viro path_put(&path); 4568ac27a0ecSDave Kleikamp return -EXDEV; 4569ac27a0ecSDave Kleikamp } 45700623543bSJan Kara /* Journaling quota? */ 45710623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 45722b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 45738264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 4574b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4575b31e1552SEric Sandeen "Quota file not on filesystem root. " 4576b31e1552SEric Sandeen "Journaled quota will not work"); 45770623543bSJan Kara } 45780623543bSJan Kara 45790623543bSJan Kara /* 45800623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 45810623543bSJan Kara * all updates to the file when we bypass pagecache... 45820623543bSJan Kara */ 45830390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 45840390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 45850623543bSJan Kara /* 45860623543bSJan Kara * We don't need to lock updates but journal_flush() could 45870623543bSJan Kara * otherwise be livelocked... 45880623543bSJan Kara */ 45890623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 45907ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 45910623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 45927ffe1ea8SHidehiro Kawai if (err) { 45938264613dSAl Viro path_put(&path); 45947ffe1ea8SHidehiro Kawai return err; 45957ffe1ea8SHidehiro Kawai } 45960623543bSJan Kara } 45970623543bSJan Kara 4598287a8095SChristoph Hellwig err = dquot_quota_on_path(sb, type, format_id, &path); 45998264613dSAl Viro path_put(&path); 460077e69dacSAl Viro return err; 4601ac27a0ecSDave Kleikamp } 4602ac27a0ecSDave Kleikamp 4603ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4604ca0e05e4SDmitry Monakhov { 460587009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 460687009d86SDmitry Monakhov * Caller already holds s_umount sem */ 460787009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4608ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4609ca0e05e4SDmitry Monakhov 4610ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4611ca0e05e4SDmitry Monakhov } 4612ca0e05e4SDmitry Monakhov 4613ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4614ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4615ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 4616ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4617617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4618ac27a0ecSDave Kleikamp size_t len, loff_t off) 4619ac27a0ecSDave Kleikamp { 4620ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4621725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4622ac27a0ecSDave Kleikamp int err = 0; 4623ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4624ac27a0ecSDave Kleikamp int tocopy; 4625ac27a0ecSDave Kleikamp size_t toread; 4626ac27a0ecSDave Kleikamp struct buffer_head *bh; 4627ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4628ac27a0ecSDave Kleikamp 4629ac27a0ecSDave Kleikamp if (off > i_size) 4630ac27a0ecSDave Kleikamp return 0; 4631ac27a0ecSDave Kleikamp if (off+len > i_size) 4632ac27a0ecSDave Kleikamp len = i_size-off; 4633ac27a0ecSDave Kleikamp toread = len; 4634ac27a0ecSDave Kleikamp while (toread > 0) { 4635ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4636ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4637617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4638ac27a0ecSDave Kleikamp if (err) 4639ac27a0ecSDave Kleikamp return err; 4640ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4641ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4642ac27a0ecSDave Kleikamp else 4643ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4644ac27a0ecSDave Kleikamp brelse(bh); 4645ac27a0ecSDave Kleikamp offset = 0; 4646ac27a0ecSDave Kleikamp toread -= tocopy; 4647ac27a0ecSDave Kleikamp data += tocopy; 4648ac27a0ecSDave Kleikamp blk++; 4649ac27a0ecSDave Kleikamp } 4650ac27a0ecSDave Kleikamp return len; 4651ac27a0ecSDave Kleikamp } 4652ac27a0ecSDave Kleikamp 4653ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4654ac27a0ecSDave Kleikamp * enough credits) */ 4655617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4656ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4657ac27a0ecSDave Kleikamp { 4658ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4659725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4660ac27a0ecSDave Kleikamp int err = 0; 4661ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4662ac27a0ecSDave Kleikamp struct buffer_head *bh; 4663ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4664ac27a0ecSDave Kleikamp 46650390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4666b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4667b31e1552SEric Sandeen " cancelled because transaction is not started", 46689c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 46699c3013e9SJan Kara return -EIO; 46709c3013e9SJan Kara } 467167eeb568SDmitry Monakhov /* 467267eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 467367eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 467467eeb568SDmitry Monakhov */ 467567eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 467667eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 467767eeb568SDmitry Monakhov " cancelled because not block aligned", 467867eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 467967eeb568SDmitry Monakhov return -EIO; 468067eeb568SDmitry Monakhov } 468167eeb568SDmitry Monakhov 4682ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4683617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4684ac27a0ecSDave Kleikamp if (!bh) 4685ac27a0ecSDave Kleikamp goto out; 4686617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4687ac27a0ecSDave Kleikamp if (err) { 4688ac27a0ecSDave Kleikamp brelse(bh); 4689ac27a0ecSDave Kleikamp goto out; 4690ac27a0ecSDave Kleikamp } 4691ac27a0ecSDave Kleikamp lock_buffer(bh); 469267eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4693ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4694ac27a0ecSDave Kleikamp unlock_buffer(bh); 46950390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4696ac27a0ecSDave Kleikamp brelse(bh); 4697ac27a0ecSDave Kleikamp out: 469867eeb568SDmitry Monakhov if (err) { 46994d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4700ac27a0ecSDave Kleikamp return err; 47014d04e4fbSJan Kara } 470267eeb568SDmitry Monakhov if (inode->i_size < off + len) { 470367eeb568SDmitry Monakhov i_size_write(inode, off + len); 4704617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4705ac27a0ecSDave Kleikamp } 4706ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4707617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4708ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 470967eeb568SDmitry Monakhov return len; 4710ac27a0ecSDave Kleikamp } 4711ac27a0ecSDave Kleikamp 4712ac27a0ecSDave Kleikamp #endif 4713ac27a0ecSDave Kleikamp 4714152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4715152a0836SAl Viro const char *dev_name, void *data) 4716ac27a0ecSDave Kleikamp { 4717152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4718ac27a0ecSDave Kleikamp } 4719ac27a0ecSDave Kleikamp 472037f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 472124b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 472224b58424STheodore Ts'o .owner = THIS_MODULE, 472324b58424STheodore Ts'o .name = "ext2", 4724152a0836SAl Viro .mount = ext4_mount, 472524b58424STheodore Ts'o .kill_sb = kill_block_super, 472624b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 472724b58424STheodore Ts'o }; 472824b58424STheodore Ts'o 472924b58424STheodore Ts'o static inline void register_as_ext2(void) 473024b58424STheodore Ts'o { 473124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 473224b58424STheodore Ts'o if (err) 473324b58424STheodore Ts'o printk(KERN_WARNING 473424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 473524b58424STheodore Ts'o } 473624b58424STheodore Ts'o 473724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 473824b58424STheodore Ts'o { 473924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 474024b58424STheodore Ts'o } 474151b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 474224b58424STheodore Ts'o #else 474324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 474424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 474524b58424STheodore Ts'o #endif 474624b58424STheodore Ts'o 474737f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 474824b58424STheodore Ts'o static inline void register_as_ext3(void) 474924b58424STheodore Ts'o { 475024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 475124b58424STheodore Ts'o if (err) 475224b58424STheodore Ts'o printk(KERN_WARNING 475324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 475424b58424STheodore Ts'o } 475524b58424STheodore Ts'o 475624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 475724b58424STheodore Ts'o { 475824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 475924b58424STheodore Ts'o } 476051b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 476124b58424STheodore Ts'o #else 476224b58424STheodore Ts'o static inline void register_as_ext3(void) { } 476324b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 476424b58424STheodore Ts'o #endif 476524b58424STheodore Ts'o 476603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4767ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 476803010a33STheodore Ts'o .name = "ext4", 4769152a0836SAl Viro .mount = ext4_mount, 4770ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4771ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4772ac27a0ecSDave Kleikamp }; 4773ac27a0ecSDave Kleikamp 4774857ac889SLukas Czerner int __init ext4_init_feat_adverts(void) 4775857ac889SLukas Czerner { 4776857ac889SLukas Czerner struct ext4_features *ef; 4777857ac889SLukas Czerner int ret = -ENOMEM; 4778857ac889SLukas Czerner 4779857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4780857ac889SLukas Czerner if (!ef) 4781857ac889SLukas Czerner goto out; 4782857ac889SLukas Czerner 4783857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4784857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4785857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4786857ac889SLukas Czerner "features"); 4787857ac889SLukas Czerner if (ret) { 4788857ac889SLukas Czerner kfree(ef); 4789857ac889SLukas Czerner goto out; 4790857ac889SLukas Czerner } 4791857ac889SLukas Czerner 4792857ac889SLukas Czerner ext4_feat = ef; 4793857ac889SLukas Czerner ret = 0; 4794857ac889SLukas Czerner out: 4795857ac889SLukas Czerner return ret; 4796857ac889SLukas Czerner } 4797857ac889SLukas Czerner 47985dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 4799ac27a0ecSDave Kleikamp { 4800c9de560dSAlex Tomas int err; 4801c9de560dSAlex Tomas 480212e9b892SDmitry Monakhov ext4_check_flag_values(); 48035dabfc78STheodore Ts'o err = ext4_init_pageio(); 48046fd058f7STheodore Ts'o if (err) 48056fd058f7STheodore Ts'o return err; 48065dabfc78STheodore Ts'o err = ext4_init_system_zone(); 4807bd2d0210STheodore Ts'o if (err) 4808bd2d0210STheodore Ts'o goto out5; 48093197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 48103197ebdbSTheodore Ts'o if (!ext4_kset) 48116fd058f7STheodore Ts'o goto out4; 48129f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4813857ac889SLukas Czerner 4814857ac889SLukas Czerner err = ext4_init_feat_adverts(); 4815857ac889SLukas Czerner 48165dabfc78STheodore Ts'o err = ext4_init_mballoc(); 4817ac27a0ecSDave Kleikamp if (err) 48186fd058f7STheodore Ts'o goto out3; 4819c9de560dSAlex Tomas 48205dabfc78STheodore Ts'o err = ext4_init_xattr(); 4821c9de560dSAlex Tomas if (err) 4822c9de560dSAlex Tomas goto out2; 4823ac27a0ecSDave Kleikamp err = init_inodecache(); 4824ac27a0ecSDave Kleikamp if (err) 4825ac27a0ecSDave Kleikamp goto out1; 482624b58424STheodore Ts'o register_as_ext2(); 482724b58424STheodore Ts'o register_as_ext3(); 482803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4829ac27a0ecSDave Kleikamp if (err) 4830ac27a0ecSDave Kleikamp goto out; 4831bfff6873SLukas Czerner 4832bfff6873SLukas Czerner ext4_li_info = NULL; 4833bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 4834ac27a0ecSDave Kleikamp return 0; 4835ac27a0ecSDave Kleikamp out: 483624b58424STheodore Ts'o unregister_as_ext2(); 483724b58424STheodore Ts'o unregister_as_ext3(); 4838ac27a0ecSDave Kleikamp destroy_inodecache(); 4839ac27a0ecSDave Kleikamp out1: 48405dabfc78STheodore Ts'o ext4_exit_xattr(); 4841c9de560dSAlex Tomas out2: 48425dabfc78STheodore Ts'o ext4_exit_mballoc(); 48436fd058f7STheodore Ts'o out3: 4844857ac889SLukas Czerner kfree(ext4_feat); 48456fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 48466fd058f7STheodore Ts'o kset_unregister(ext4_kset); 48476fd058f7STheodore Ts'o out4: 48485dabfc78STheodore Ts'o ext4_exit_system_zone(); 4849bd2d0210STheodore Ts'o out5: 48505dabfc78STheodore Ts'o ext4_exit_pageio(); 4851ac27a0ecSDave Kleikamp return err; 4852ac27a0ecSDave Kleikamp } 4853ac27a0ecSDave Kleikamp 48545dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 4855ac27a0ecSDave Kleikamp { 4856bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 485724b58424STheodore Ts'o unregister_as_ext2(); 485824b58424STheodore Ts'o unregister_as_ext3(); 485903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4860ac27a0ecSDave Kleikamp destroy_inodecache(); 48615dabfc78STheodore Ts'o ext4_exit_xattr(); 48625dabfc78STheodore Ts'o ext4_exit_mballoc(); 48639f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 48643197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 48655dabfc78STheodore Ts'o ext4_exit_system_zone(); 48665dabfc78STheodore Ts'o ext4_exit_pageio(); 4867ac27a0ecSDave Kleikamp } 4868ac27a0ecSDave Kleikamp 4869ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 487083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4871ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 48725dabfc78STheodore Ts'o module_init(ext4_init_fs) 48735dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 4874