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; 570b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 580b75a840SLukas Czerner static struct mutex ext4_li_mtx; 590b75a840SLukas Czerner static 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); 78*d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 79bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 80bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 818f1f7453SEric Sandeen static void ext4_clear_request_list(void); 82ac27a0ecSDave Kleikamp 83ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 84ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 85ba69f9abSJan Kara .owner = THIS_MODULE, 86ba69f9abSJan Kara .name = "ext3", 87152a0836SAl Viro .mount = ext4_mount, 88ba69f9abSJan Kara .kill_sb = kill_block_super, 89ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 90ba69f9abSJan Kara }; 91ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 92ba69f9abSJan Kara #else 93ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 94ba69f9abSJan Kara #endif 95bd81d8eeSLaurent Vivier 968fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 978fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 98bd81d8eeSLaurent Vivier { 993a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1008fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1018fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 102bd81d8eeSLaurent Vivier } 103bd81d8eeSLaurent Vivier 1048fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1058fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 106bd81d8eeSLaurent Vivier { 1075272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1088fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1098fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 110bd81d8eeSLaurent Vivier } 111bd81d8eeSLaurent Vivier 1128fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1138fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 114bd81d8eeSLaurent Vivier { 1155272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1168fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1178fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 118bd81d8eeSLaurent Vivier } 119bd81d8eeSLaurent Vivier 120560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 121560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 122560671a0SAneesh Kumar K.V { 123560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 124560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 125560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 126560671a0SAneesh Kumar K.V } 127560671a0SAneesh Kumar K.V 128560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 129560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 130560671a0SAneesh Kumar K.V { 131560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 132560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 133560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 134560671a0SAneesh Kumar K.V } 135560671a0SAneesh Kumar K.V 136560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 137560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 138560671a0SAneesh Kumar K.V { 139560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 140560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 141560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 142560671a0SAneesh Kumar K.V } 143560671a0SAneesh Kumar K.V 144560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 145560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 146560671a0SAneesh Kumar K.V { 147560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 148560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 149560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 150560671a0SAneesh Kumar K.V } 151560671a0SAneesh Kumar K.V 1528fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1538fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 154bd81d8eeSLaurent Vivier { 1553a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1568fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1578fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 158bd81d8eeSLaurent Vivier } 159bd81d8eeSLaurent Vivier 1608fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1618fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 162bd81d8eeSLaurent Vivier { 1635272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1648fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1658fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 166bd81d8eeSLaurent Vivier } 167bd81d8eeSLaurent Vivier 1688fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1698fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 170bd81d8eeSLaurent Vivier { 1715272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1728fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1738fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 174bd81d8eeSLaurent Vivier } 175bd81d8eeSLaurent Vivier 176560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 177560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 178560671a0SAneesh Kumar K.V { 179560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 180560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 181560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 182560671a0SAneesh Kumar K.V } 183560671a0SAneesh Kumar K.V 184560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 185560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 186560671a0SAneesh Kumar K.V { 187560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 188560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 189560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 190560671a0SAneesh Kumar K.V } 191560671a0SAneesh Kumar K.V 192560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 193560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 194560671a0SAneesh Kumar K.V { 195560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 196560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 197560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 198560671a0SAneesh Kumar K.V } 199560671a0SAneesh Kumar K.V 200560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 201560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 202560671a0SAneesh Kumar K.V { 203560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 204560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 205560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 206560671a0SAneesh Kumar K.V } 207560671a0SAneesh Kumar K.V 208d3d1faf6SCurt Wohlgemuth 209d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 210d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 211d3d1faf6SCurt Wohlgemuth { 212d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 213d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 214d3d1faf6SCurt Wohlgemuth 215d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 216d3d1faf6SCurt Wohlgemuth 217d3d1faf6SCurt Wohlgemuth ref_cnt++; 218d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 219d3d1faf6SCurt Wohlgemuth 220d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 221d3d1faf6SCurt Wohlgemuth return handle; 222d3d1faf6SCurt Wohlgemuth } 223d3d1faf6SCurt Wohlgemuth 224d3d1faf6SCurt Wohlgemuth 225d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 226d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 227d3d1faf6SCurt Wohlgemuth { 228d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 229d3d1faf6SCurt Wohlgemuth 230d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 231d3d1faf6SCurt Wohlgemuth 232d3d1faf6SCurt Wohlgemuth ref_cnt--; 233d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 234d3d1faf6SCurt Wohlgemuth 235d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 236d3d1faf6SCurt Wohlgemuth } 237d3d1faf6SCurt Wohlgemuth 238ac27a0ecSDave Kleikamp /* 239dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 240ac27a0ecSDave Kleikamp * 241ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 242ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 243ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 244ac27a0ecSDave Kleikamp * appropriate. 245ac27a0ecSDave Kleikamp */ 246617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 247ac27a0ecSDave Kleikamp { 248ac27a0ecSDave Kleikamp journal_t *journal; 249ac27a0ecSDave Kleikamp 250ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 251ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 252ac27a0ecSDave Kleikamp 253437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 254ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 255ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 256ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 257617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2580390131bSFrank Mayhar if (journal) { 259ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 260c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 261ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 262ac27a0ecSDave Kleikamp } 263dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 264ac27a0ecSDave Kleikamp } 265d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2660390131bSFrank Mayhar } 267ac27a0ecSDave Kleikamp 268ac27a0ecSDave Kleikamp /* 269ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 270dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 271ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 272ac27a0ecSDave Kleikamp * appropriate. 273ac27a0ecSDave Kleikamp */ 274c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 275ac27a0ecSDave Kleikamp { 276ac27a0ecSDave Kleikamp struct super_block *sb; 277ac27a0ecSDave Kleikamp int err; 278ac27a0ecSDave Kleikamp int rc; 279ac27a0ecSDave Kleikamp 2800390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 281d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2820390131bSFrank Mayhar return 0; 2830390131bSFrank Mayhar } 284ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 285ac27a0ecSDave Kleikamp err = handle->h_err; 286dab291afSMingming Cao rc = jbd2_journal_stop(handle); 287ac27a0ecSDave Kleikamp 288ac27a0ecSDave Kleikamp if (!err) 289ac27a0ecSDave Kleikamp err = rc; 290ac27a0ecSDave Kleikamp if (err) 291c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 292ac27a0ecSDave Kleikamp return err; 293ac27a0ecSDave Kleikamp } 294ac27a0ecSDave Kleikamp 29590c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 29690c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 29790c7201bSTheodore Ts'o handle_t *handle, int err) 298ac27a0ecSDave Kleikamp { 299ac27a0ecSDave Kleikamp char nbuf[16]; 300617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 301ac27a0ecSDave Kleikamp 3020390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3030390131bSFrank Mayhar 304ac27a0ecSDave Kleikamp if (bh) 305ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 306ac27a0ecSDave Kleikamp 307ac27a0ecSDave Kleikamp if (!handle->h_err) 308ac27a0ecSDave Kleikamp handle->h_err = err; 309ac27a0ecSDave Kleikamp 310ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 311ac27a0ecSDave Kleikamp return; 312ac27a0ecSDave Kleikamp 31390c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 31490c7201bSTheodore Ts'o caller, line, errstr, err_fn); 315ac27a0ecSDave Kleikamp 316dab291afSMingming Cao jbd2_journal_abort_handle(handle); 317ac27a0ecSDave Kleikamp } 318ac27a0ecSDave Kleikamp 3191c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3201c13d5c0STheodore Ts'o unsigned int line) 3211c13d5c0STheodore Ts'o { 3221c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3231c13d5c0STheodore Ts'o 3241c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3251c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3261c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3271c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3281c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3291c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3301c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3311c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3321c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3331c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3341c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3351c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3361c13d5c0STheodore Ts'o } 33766e61a9eSTheodore Ts'o /* 33866e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33966e61a9eSTheodore Ts'o * started already 34066e61a9eSTheodore Ts'o */ 34166e61a9eSTheodore Ts'o if (!es->s_error_count) 34266e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 3431c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 3441c13d5c0STheodore Ts'o } 3451c13d5c0STheodore Ts'o 3461c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3471c13d5c0STheodore Ts'o unsigned int line) 3481c13d5c0STheodore Ts'o { 3491c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3501c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3511c13d5c0STheodore Ts'o } 3521c13d5c0STheodore Ts'o 3531c13d5c0STheodore Ts'o 354ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 355ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 356ac27a0ecSDave Kleikamp * 357ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 358617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 359ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 360ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 361ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 362ac27a0ecSDave Kleikamp * write out the superblock safely. 363ac27a0ecSDave Kleikamp * 364dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 365d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 366ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 367ac27a0ecSDave Kleikamp */ 368ac27a0ecSDave Kleikamp 369617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 370ac27a0ecSDave Kleikamp { 371ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 372ac27a0ecSDave Kleikamp return; 373ac27a0ecSDave Kleikamp 374ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 375617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 376ac27a0ecSDave Kleikamp 3774ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 378ac27a0ecSDave Kleikamp if (journal) 379dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 380ac27a0ecSDave Kleikamp } 381ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 382b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 383ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 384ac27a0ecSDave Kleikamp } 385ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 386617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 387ac27a0ecSDave Kleikamp sb->s_id); 388ac27a0ecSDave Kleikamp } 389ac27a0ecSDave Kleikamp 39012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 391c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 392ac27a0ecSDave Kleikamp { 3930ff2ea7dSJoe Perches struct va_format vaf; 394ac27a0ecSDave Kleikamp va_list args; 395ac27a0ecSDave Kleikamp 396ac27a0ecSDave Kleikamp va_start(args, fmt); 3970ff2ea7dSJoe Perches vaf.fmt = fmt; 3980ff2ea7dSJoe Perches vaf.va = &args; 3990ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4000ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 401ac27a0ecSDave Kleikamp va_end(args); 402ac27a0ecSDave Kleikamp 403617ba13bSMingming Cao ext4_handle_error(sb); 404ac27a0ecSDave Kleikamp } 405ac27a0ecSDave Kleikamp 406c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 407c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 408273df556SFrank Mayhar const char *fmt, ...) 409273df556SFrank Mayhar { 410273df556SFrank Mayhar va_list args; 411f7c21177STheodore Ts'o struct va_format vaf; 4121c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 413273df556SFrank Mayhar 4141c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4151c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4161c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 417273df556SFrank Mayhar va_start(args, fmt); 418f7c21177STheodore Ts'o vaf.fmt = fmt; 419f7c21177STheodore Ts'o vaf.va = &args; 420c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 421c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 422c398eda0STheodore Ts'o if (block) 423f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 424f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); 425273df556SFrank Mayhar va_end(args); 426273df556SFrank Mayhar 427273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 428273df556SFrank Mayhar } 429273df556SFrank Mayhar 430c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 431f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 432f7c21177STheodore Ts'o const char *fmt, ...) 433273df556SFrank Mayhar { 434273df556SFrank Mayhar va_list args; 435f7c21177STheodore Ts'o struct va_format vaf; 4361c13d5c0STheodore Ts'o struct ext4_super_block *es; 437273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 438273df556SFrank Mayhar char pathname[80], *path; 439273df556SFrank Mayhar 4401c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4411c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4421c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 443273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 444f9a62d09SDan Carpenter if (IS_ERR(path)) 445273df556SFrank Mayhar path = "(unknown)"; 446273df556SFrank Mayhar printk(KERN_CRIT 447f7c21177STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 448f7c21177STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 449f7c21177STheodore Ts'o if (block) 450f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 451f7c21177STheodore Ts'o va_start(args, fmt); 452f7c21177STheodore Ts'o vaf.fmt = fmt; 453f7c21177STheodore Ts'o vaf.va = &args; 454f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); 455273df556SFrank Mayhar va_end(args); 456273df556SFrank Mayhar 457273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 458273df556SFrank Mayhar } 459273df556SFrank Mayhar 460617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 461ac27a0ecSDave Kleikamp char nbuf[16]) 462ac27a0ecSDave Kleikamp { 463ac27a0ecSDave Kleikamp char *errstr = NULL; 464ac27a0ecSDave Kleikamp 465ac27a0ecSDave Kleikamp switch (errno) { 466ac27a0ecSDave Kleikamp case -EIO: 467ac27a0ecSDave Kleikamp errstr = "IO failure"; 468ac27a0ecSDave Kleikamp break; 469ac27a0ecSDave Kleikamp case -ENOMEM: 470ac27a0ecSDave Kleikamp errstr = "Out of memory"; 471ac27a0ecSDave Kleikamp break; 472ac27a0ecSDave Kleikamp case -EROFS: 47378f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 47478f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 475ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 476ac27a0ecSDave Kleikamp else 477ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 478ac27a0ecSDave Kleikamp break; 479ac27a0ecSDave Kleikamp default: 480ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 481ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 482ac27a0ecSDave Kleikamp * NULL. */ 483ac27a0ecSDave Kleikamp if (nbuf) { 484ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 485ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 486ac27a0ecSDave Kleikamp errstr = nbuf; 487ac27a0ecSDave Kleikamp } 488ac27a0ecSDave Kleikamp break; 489ac27a0ecSDave Kleikamp } 490ac27a0ecSDave Kleikamp 491ac27a0ecSDave Kleikamp return errstr; 492ac27a0ecSDave Kleikamp } 493ac27a0ecSDave Kleikamp 494617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 495ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 496ac27a0ecSDave Kleikamp 497c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 498c398eda0STheodore Ts'o unsigned int line, int errno) 499ac27a0ecSDave Kleikamp { 500ac27a0ecSDave Kleikamp char nbuf[16]; 501ac27a0ecSDave Kleikamp const char *errstr; 502ac27a0ecSDave Kleikamp 503ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 504ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 505ac27a0ecSDave Kleikamp * an error. */ 506ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 507ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 508ac27a0ecSDave Kleikamp return; 509ac27a0ecSDave Kleikamp 510617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 511c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 512c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5131c13d5c0STheodore Ts'o save_error_info(sb, function, line); 514ac27a0ecSDave Kleikamp 515617ba13bSMingming Cao ext4_handle_error(sb); 516ac27a0ecSDave Kleikamp } 517ac27a0ecSDave Kleikamp 518ac27a0ecSDave Kleikamp /* 519617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 520ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 521ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 522ac27a0ecSDave Kleikamp * 523ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 524ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 525ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 526ac27a0ecSDave Kleikamp */ 527ac27a0ecSDave Kleikamp 528c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 529c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 530ac27a0ecSDave Kleikamp { 531ac27a0ecSDave Kleikamp va_list args; 532ac27a0ecSDave Kleikamp 5331c13d5c0STheodore Ts'o save_error_info(sb, function, line); 534ac27a0ecSDave Kleikamp va_start(args, fmt); 535c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 536c398eda0STheodore Ts'o function, line); 537ac27a0ecSDave Kleikamp vprintk(fmt, args); 538ac27a0ecSDave Kleikamp printk("\n"); 539ac27a0ecSDave Kleikamp va_end(args); 540ac27a0ecSDave Kleikamp 5411c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 542b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 543ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5444ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 545ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 546dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5471c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5481c13d5c0STheodore Ts'o } 5491c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5501c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 551ac27a0ecSDave Kleikamp } 552ac27a0ecSDave Kleikamp 5530ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 554b31e1552SEric Sandeen { 5550ff2ea7dSJoe Perches struct va_format vaf; 556b31e1552SEric Sandeen va_list args; 557b31e1552SEric Sandeen 558b31e1552SEric Sandeen va_start(args, fmt); 5590ff2ea7dSJoe Perches vaf.fmt = fmt; 5600ff2ea7dSJoe Perches vaf.va = &args; 5610ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 562b31e1552SEric Sandeen va_end(args); 563b31e1552SEric Sandeen } 564b31e1552SEric Sandeen 56512062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 566c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 567ac27a0ecSDave Kleikamp { 5680ff2ea7dSJoe Perches struct va_format vaf; 569ac27a0ecSDave Kleikamp va_list args; 570ac27a0ecSDave Kleikamp 571ac27a0ecSDave Kleikamp va_start(args, fmt); 5720ff2ea7dSJoe Perches vaf.fmt = fmt; 5730ff2ea7dSJoe Perches vaf.va = &args; 5740ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 5750ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 576ac27a0ecSDave Kleikamp va_end(args); 577ac27a0ecSDave Kleikamp } 578ac27a0ecSDave Kleikamp 579e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 580e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 581e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 582e29136f8STheodore Ts'o const char *fmt, ...) 5835d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5845d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5855d1b1b3fSAneesh Kumar K.V { 5860ff2ea7dSJoe Perches struct va_format vaf; 5875d1b1b3fSAneesh Kumar K.V va_list args; 5885d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5895d1b1b3fSAneesh Kumar K.V 5901c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 5911c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5921c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 5930ff2ea7dSJoe Perches 5945d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 5950ff2ea7dSJoe Perches 5960ff2ea7dSJoe Perches vaf.fmt = fmt; 5970ff2ea7dSJoe Perches vaf.va = &args; 598e29136f8STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", 599e29136f8STheodore Ts'o sb->s_id, function, line, grp); 600e29136f8STheodore Ts'o if (ino) 6010ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 602e29136f8STheodore Ts'o if (block) 6030ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 6040ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6055d1b1b3fSAneesh Kumar K.V va_end(args); 6065d1b1b3fSAneesh Kumar K.V 6075d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 608e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6095d1b1b3fSAneesh Kumar K.V return; 6105d1b1b3fSAneesh Kumar K.V } 6111c13d5c0STheodore Ts'o 6125d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6135d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6145d1b1b3fSAneesh Kumar K.V /* 6155d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6165d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6175d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6185d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6195d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 6205d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 6215d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6225d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6235d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6245d1b1b3fSAneesh Kumar K.V */ 6255d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6265d1b1b3fSAneesh Kumar K.V return; 6275d1b1b3fSAneesh Kumar K.V } 6285d1b1b3fSAneesh Kumar K.V 629617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 630ac27a0ecSDave Kleikamp { 631617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 632ac27a0ecSDave Kleikamp 633617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 634ac27a0ecSDave Kleikamp return; 635ac27a0ecSDave Kleikamp 63612062dddSEric Sandeen ext4_warning(sb, 637ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 638ac27a0ecSDave Kleikamp "running e2fsck is recommended", 639617ba13bSMingming Cao EXT4_DYNAMIC_REV); 640ac27a0ecSDave Kleikamp 641617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 642617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 643617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 644ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 645ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 646ac27a0ecSDave Kleikamp 647ac27a0ecSDave Kleikamp /* 648ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 649ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 650ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 651ac27a0ecSDave Kleikamp */ 652ac27a0ecSDave Kleikamp } 653ac27a0ecSDave Kleikamp 654ac27a0ecSDave Kleikamp /* 655ac27a0ecSDave Kleikamp * Open the external journal device 656ac27a0ecSDave Kleikamp */ 657b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 658ac27a0ecSDave Kleikamp { 659ac27a0ecSDave Kleikamp struct block_device *bdev; 660ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 661ac27a0ecSDave Kleikamp 662d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 663ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 664ac27a0ecSDave Kleikamp goto fail; 665ac27a0ecSDave Kleikamp return bdev; 666ac27a0ecSDave Kleikamp 667ac27a0ecSDave Kleikamp fail: 668b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 669ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 670ac27a0ecSDave Kleikamp return NULL; 671ac27a0ecSDave Kleikamp } 672ac27a0ecSDave Kleikamp 673ac27a0ecSDave Kleikamp /* 674ac27a0ecSDave Kleikamp * Release the journal device 675ac27a0ecSDave Kleikamp */ 676617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 677ac27a0ecSDave Kleikamp { 678e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 679ac27a0ecSDave Kleikamp } 680ac27a0ecSDave Kleikamp 681617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 682ac27a0ecSDave Kleikamp { 683ac27a0ecSDave Kleikamp struct block_device *bdev; 684ac27a0ecSDave Kleikamp int ret = -ENODEV; 685ac27a0ecSDave Kleikamp 686ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 687ac27a0ecSDave Kleikamp if (bdev) { 688617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 689ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 690ac27a0ecSDave Kleikamp } 691ac27a0ecSDave Kleikamp return ret; 692ac27a0ecSDave Kleikamp } 693ac27a0ecSDave Kleikamp 694ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 695ac27a0ecSDave Kleikamp { 696617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 697ac27a0ecSDave Kleikamp } 698ac27a0ecSDave Kleikamp 699617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 700ac27a0ecSDave Kleikamp { 701ac27a0ecSDave Kleikamp struct list_head *l; 702ac27a0ecSDave Kleikamp 703b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 704ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 705ac27a0ecSDave Kleikamp 706ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 707ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 708ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 709ac27a0ecSDave Kleikamp printk(KERN_ERR " " 710ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 711ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 712ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 713ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 714ac27a0ecSDave Kleikamp } 715ac27a0ecSDave Kleikamp } 716ac27a0ecSDave Kleikamp 717617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 718ac27a0ecSDave Kleikamp { 719617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 720617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 721ef2cabf7SHidehiro Kawai int i, err; 722ac27a0ecSDave Kleikamp 723857ac889SLukas Czerner ext4_unregister_li_request(sb); 724e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 725e0ccfd95SChristoph Hellwig 7264c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7274c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7284c0425ffSMingming Cao 729a9e220f8SAl Viro lock_super(sb); 7308c85e125SChristoph Hellwig if (sb->s_dirt) 731ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 7328c85e125SChristoph Hellwig 7330390131bSFrank Mayhar if (sbi->s_journal) { 734ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 73547b4a50bSJan Kara sbi->s_journal = NULL; 736ef2cabf7SHidehiro Kawai if (err < 0) 737c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7380390131bSFrank Mayhar } 739d4edac31SJosef Bacik 740a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 741d4edac31SJosef Bacik ext4_release_system_zone(sb); 742d4edac31SJosef Bacik ext4_mb_release(sb); 743d4edac31SJosef Bacik ext4_ext_release(sb); 744d4edac31SJosef Bacik ext4_xattr_put_super(sb); 745d4edac31SJosef Bacik 746ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 747617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 748ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 749e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 750ac27a0ecSDave Kleikamp } 751240799cdSTheodore Ts'o if (sbi->s_proc) { 7529f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 753240799cdSTheodore Ts'o } 7543197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 755ac27a0ecSDave Kleikamp 756ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 757ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 758ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 759c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 760c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 761c5ca7c76STheodore Ts'o else 762772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 763ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 764ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 765ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 7666bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 767ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 768ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 769ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 770ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 771ac27a0ecSDave Kleikamp #endif 772ac27a0ecSDave Kleikamp 773ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 774ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 775ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 776ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 777ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 778ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 779ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 780ac27a0ecSDave Kleikamp 781f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 782ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 783ac27a0ecSDave Kleikamp /* 784ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 785ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 786ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 787ac27a0ecSDave Kleikamp */ 788ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 789f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 790617ba13bSMingming Cao ext4_blkdev_remove(sbi); 791ac27a0ecSDave Kleikamp } 792ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7933197ebdbSTheodore Ts'o /* 7943197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7953197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7963197ebdbSTheodore Ts'o */ 7973197ebdbSTheodore Ts'o unlock_super(sb); 7983197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7993197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 800705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 801ac27a0ecSDave Kleikamp kfree(sbi); 802ac27a0ecSDave Kleikamp } 803ac27a0ecSDave Kleikamp 804e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 805ac27a0ecSDave Kleikamp 806ac27a0ecSDave Kleikamp /* 807ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 808ac27a0ecSDave Kleikamp */ 809617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 810ac27a0ecSDave Kleikamp { 811617ba13bSMingming Cao struct ext4_inode_info *ei; 812ac27a0ecSDave Kleikamp 813e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 814ac27a0ecSDave Kleikamp if (!ei) 815ac27a0ecSDave Kleikamp return NULL; 8160b8e58a1SAndreas Dilger 817ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 81891246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 819a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 820c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 821c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 822d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 823d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 824d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8259d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 826d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 827a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 828a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 829a9e7f447SDmitry Monakhov #endif 8308aefcd55STheodore Ts'o ei->jinode = NULL; 831c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 832744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 8338d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 834b436b9beSJan Kara ei->i_sync_tid = 0; 835b436b9beSJan Kara ei->i_datasync_tid = 0; 836f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 837e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 8380b8e58a1SAndreas Dilger 839ac27a0ecSDave Kleikamp return &ei->vfs_inode; 840ac27a0ecSDave Kleikamp } 841ac27a0ecSDave Kleikamp 8427ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 8437ff9c073STheodore Ts'o { 8447ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 8457ff9c073STheodore Ts'o 8467ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 8477ff9c073STheodore Ts'o return drop; 8487ff9c073STheodore Ts'o } 8497ff9c073STheodore Ts'o 850fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 851fa0d7e3dSNick Piggin { 852fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 853fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 854fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 855fa0d7e3dSNick Piggin } 856fa0d7e3dSNick Piggin 857617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 858ac27a0ecSDave Kleikamp { 859f7ad6d2eSTheodore Ts'o ext4_ioend_wait(inode); 8609f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 861b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 862b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 863b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 8649f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 8659f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 8669f7dd93dSVasily Averin true); 8679f7dd93dSVasily Averin dump_stack(); 8689f7dd93dSVasily Averin } 869fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 870ac27a0ecSDave Kleikamp } 871ac27a0ecSDave Kleikamp 87251cc5068SAlexey Dobriyan static void init_once(void *foo) 873ac27a0ecSDave Kleikamp { 874617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 875ac27a0ecSDave Kleikamp 876ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 87703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 878ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 879ac27a0ecSDave Kleikamp #endif 8800e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 881ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 882ac27a0ecSDave Kleikamp } 883ac27a0ecSDave Kleikamp 884ac27a0ecSDave Kleikamp static int init_inodecache(void) 885ac27a0ecSDave Kleikamp { 886617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 887617ba13bSMingming Cao sizeof(struct ext4_inode_info), 888ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 889ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 89020c2df83SPaul Mundt init_once); 891617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 892ac27a0ecSDave Kleikamp return -ENOMEM; 893ac27a0ecSDave Kleikamp return 0; 894ac27a0ecSDave Kleikamp } 895ac27a0ecSDave Kleikamp 896ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 897ac27a0ecSDave Kleikamp { 898617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 899ac27a0ecSDave Kleikamp } 900ac27a0ecSDave Kleikamp 9010930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 902ac27a0ecSDave Kleikamp { 9030930fcc1SAl Viro invalidate_inode_buffers(inode); 9040930fcc1SAl Viro end_writeback(inode); 9059f754758SChristoph Hellwig dquot_drop(inode); 906c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 9078aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9088aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9098aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9108aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9118aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9128aefcd55STheodore Ts'o } 913ac27a0ecSDave Kleikamp } 914ac27a0ecSDave Kleikamp 9152b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 9162b2d6d01STheodore Ts'o struct super_block *sb) 917ac27a0ecSDave Kleikamp { 918ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 919617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 920ac27a0ecSDave Kleikamp 9215a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 9225a20bdfcSJan Kara char *fmtname = ""; 9235a20bdfcSJan Kara 9245a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 9255a20bdfcSJan Kara case QFMT_VFS_OLD: 9265a20bdfcSJan Kara fmtname = "vfsold"; 9275a20bdfcSJan Kara break; 9285a20bdfcSJan Kara case QFMT_VFS_V0: 9295a20bdfcSJan Kara fmtname = "vfsv0"; 9305a20bdfcSJan Kara break; 9315a20bdfcSJan Kara case QFMT_VFS_V1: 9325a20bdfcSJan Kara fmtname = "vfsv1"; 9335a20bdfcSJan Kara break; 9345a20bdfcSJan Kara } 9355a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 9365a20bdfcSJan Kara } 937ac27a0ecSDave Kleikamp 938ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 939ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 940ac27a0ecSDave Kleikamp 941ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 942ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 943ac27a0ecSDave Kleikamp 944482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 945ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 946ac27a0ecSDave Kleikamp 947482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 948ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 949ac27a0ecSDave Kleikamp #endif 950ac27a0ecSDave Kleikamp } 951ac27a0ecSDave Kleikamp 952d9c9bef1SMiklos Szeredi /* 953d9c9bef1SMiklos Szeredi * Show an option if 954d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 955d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 956d9c9bef1SMiklos Szeredi */ 957617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 958ac27a0ecSDave Kleikamp { 959aa22df2cSAneesh Kumar K.V int def_errors; 960aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 961ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 962d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 963d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 964d9c9bef1SMiklos Szeredi 965d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 966aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 967d9c9bef1SMiklos Szeredi 968d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 969d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 970d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 971d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 972aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 973d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 974d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 975d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 976d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 977d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 978d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 979d9c9bef1SMiklos Szeredi } 980d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 981d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 982d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 983d9c9bef1SMiklos Szeredi } 984bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 985d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 986bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 987d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 988bb4f397aSAneesh Kumar K.V } 989bb4f397aSAneesh Kumar K.V } 990aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 991bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 992aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 993d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 994aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 995d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 996aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 997d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 998d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 999d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 100003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1001ea663336SEric Sandeen if (test_opt(sb, XATTR_USER)) 1002d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 1003ea663336SEric Sandeen if (!test_opt(sb, XATTR_USER)) 1004d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 1005d9c9bef1SMiklos Szeredi #endif 100603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1007aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 1008d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 1009d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 1010d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 1011d9c9bef1SMiklos Szeredi #endif 101230773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 1013d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 1014d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 1015d9c9bef1SMiklos Szeredi } 101630773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 101730773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 101830773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 101930773840STheodore Ts'o } 102030773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 102130773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 102230773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 102330773840STheodore Ts'o } 102430773840STheodore Ts'o 1025571640caSEric Sandeen /* 1026571640caSEric Sandeen * We're changing the default of barrier mount option, so 1027571640caSEric Sandeen * let's always display its mount state so it's clear what its 1028571640caSEric Sandeen * status is. 1029571640caSEric Sandeen */ 1030571640caSEric Sandeen seq_puts(seq, ",barrier="); 1031571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1032cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1033cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 103439a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 103539a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 103625ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 103725ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 10388b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 10398b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1040dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1041dd919b98SAneesh Kumar K.V 10426fd7a467STheodore Ts'o if (!test_opt(sb, MBLK_IO_SUBMIT)) 10436fd7a467STheodore Ts'o seq_puts(seq, ",nomblk_io_submit"); 1044cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1045cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1046aa22df2cSAneesh Kumar K.V /* 1047aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1048aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1049aa22df2cSAneesh Kumar K.V */ 1050617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1051ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1052617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1053ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1054617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1055ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1056ac27a0ecSDave Kleikamp 1057240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1058240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1059240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1060240799cdSTheodore Ts'o 10615bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 10625bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 10635bf5683aSHidehiro Kawai 1064afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 106506705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1066afd4672dSTheodore Ts'o 10678b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 10685328e635SEric Sandeen seq_puts(seq, ",discard"); 10695328e635SEric Sandeen 1070e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1071e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1072e3bb52aeSEric Sandeen 1073744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1074744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1075744692dcSJiaying Zhang 10768b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 10778b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 10788b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 10798b67f04aSTheodore Ts'o 1080bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1081bfff6873SLukas Czerner seq_puts(seq, ",noinit_inode_table"); 1082bfff6873SLukas Czerner else if (sbi->s_li_wait_mult) 1083bfff6873SLukas Czerner seq_printf(seq, ",init_inode_table=%u", 1084bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1085bfff6873SLukas Czerner 1086617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 10870b8e58a1SAndreas Dilger 1088ac27a0ecSDave Kleikamp return 0; 1089ac27a0ecSDave Kleikamp } 1090ac27a0ecSDave Kleikamp 10911b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10921b961ac0SChristoph Hellwig u64 ino, u32 generation) 1093ac27a0ecSDave Kleikamp { 1094ac27a0ecSDave Kleikamp struct inode *inode; 1095ac27a0ecSDave Kleikamp 1096617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1097ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1098617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1099ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1100ac27a0ecSDave Kleikamp 1101ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1102ac27a0ecSDave Kleikamp * 1103617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1104ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1105ac27a0ecSDave Kleikamp * 1106ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1107ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1108ac27a0ecSDave Kleikamp */ 11091d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 11101d1fe1eeSDavid Howells if (IS_ERR(inode)) 11111d1fe1eeSDavid Howells return ERR_CAST(inode); 11121d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1113ac27a0ecSDave Kleikamp iput(inode); 1114ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1115ac27a0ecSDave Kleikamp } 11161b961ac0SChristoph Hellwig 11171b961ac0SChristoph Hellwig return inode; 1118ac27a0ecSDave Kleikamp } 11191b961ac0SChristoph Hellwig 11201b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11211b961ac0SChristoph Hellwig int fh_len, int fh_type) 11221b961ac0SChristoph Hellwig { 11231b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11241b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11251b961ac0SChristoph Hellwig } 11261b961ac0SChristoph Hellwig 11271b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11281b961ac0SChristoph Hellwig int fh_len, int fh_type) 11291b961ac0SChristoph Hellwig { 11301b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11311b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1132ac27a0ecSDave Kleikamp } 1133ac27a0ecSDave Kleikamp 1134c39a7f84SToshiyuki Okajima /* 1135c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1136c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1137c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1138c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1139c39a7f84SToshiyuki Okajima */ 11400b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11410b8e58a1SAndreas Dilger gfp_t wait) 1142c39a7f84SToshiyuki Okajima { 1143c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1144c39a7f84SToshiyuki Okajima 1145c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1146c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1147c39a7f84SToshiyuki Okajima return 0; 1148c39a7f84SToshiyuki Okajima if (journal) 1149c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1150c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1151c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1152c39a7f84SToshiyuki Okajima } 1153c39a7f84SToshiyuki Okajima 1154ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1155ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1156ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1157ac27a0ecSDave Kleikamp 1158617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1159617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1160617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1161617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1162617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11636f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1164f00c9e44SJan Kara struct path *path); 1165ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1166617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1167617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1168ac27a0ecSDave Kleikamp size_t len, loff_t off); 1169617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1170ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1171ac27a0ecSDave Kleikamp 117261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1173a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 117460e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1175a9e7f447SDmitry Monakhov #endif 1176617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1177617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1178617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1179617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1180a5b5ee32SJan Kara .write_info = ext4_write_info, 1181a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1182a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1183ac27a0ecSDave Kleikamp }; 1184ac27a0ecSDave Kleikamp 11850d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1186617ba13bSMingming Cao .quota_on = ext4_quota_on, 1187ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1188287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1189287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1190287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1191287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1192287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1193ac27a0ecSDave Kleikamp }; 1194ac27a0ecSDave Kleikamp #endif 1195ac27a0ecSDave Kleikamp 1196ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1197617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1198617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1199617ba13bSMingming Cao .write_inode = ext4_write_inode, 1200617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12017ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12020930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1203617ba13bSMingming Cao .put_super = ext4_put_super, 1204617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1205c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1206c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1207617ba13bSMingming Cao .statfs = ext4_statfs, 1208617ba13bSMingming Cao .remount_fs = ext4_remount, 1209617ba13bSMingming Cao .show_options = ext4_show_options, 1210ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1211617ba13bSMingming Cao .quota_read = ext4_quota_read, 1212617ba13bSMingming Cao .quota_write = ext4_quota_write, 1213ac27a0ecSDave Kleikamp #endif 1214c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1215ac27a0ecSDave Kleikamp }; 1216ac27a0ecSDave Kleikamp 12179ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 12189ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 12199ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 12209ca92389STheodore Ts'o .write_inode = ext4_write_inode, 12219ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 12227ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12230930fcc1SAl Viro .evict_inode = ext4_evict_inode, 12249ca92389STheodore Ts'o .write_super = ext4_write_super, 12259ca92389STheodore Ts'o .put_super = ext4_put_super, 12269ca92389STheodore Ts'o .statfs = ext4_statfs, 12279ca92389STheodore Ts'o .remount_fs = ext4_remount, 12289ca92389STheodore Ts'o .show_options = ext4_show_options, 12299ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12309ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12319ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12329ca92389STheodore Ts'o #endif 12339ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12349ca92389STheodore Ts'o }; 12359ca92389STheodore Ts'o 123639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12371b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12381b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1239617ba13bSMingming Cao .get_parent = ext4_get_parent, 1240ac27a0ecSDave Kleikamp }; 1241ac27a0ecSDave Kleikamp 1242ac27a0ecSDave Kleikamp enum { 1243ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1244ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 124501436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1246ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 124706705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 124830773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1249c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1250818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1251ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1252296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1253ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12545a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 12555a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 12565a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 12571449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12581449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12595328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1260744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 12615328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1262bfff6873SLukas Czerner Opt_init_inode_table, Opt_noinit_inode_table, 1263ac27a0ecSDave Kleikamp }; 1264ac27a0ecSDave Kleikamp 1265a447c093SSteven Whitehouse static const match_table_t tokens = { 1266ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1267ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1268ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1269ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1270ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1271ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1272ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1273ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1274ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1275ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1276ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1277ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1278ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1279ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1280ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1281ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1282ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1283ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1284ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1285ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1286ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1287e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1288ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1289ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1290ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 129130773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 129230773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1293ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1294ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1295818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1296818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1297ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1298ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1299ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1300ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13015bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13025bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1303ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1304ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1305ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1306ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1307ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1308ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13095a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1310ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1311ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1312ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1313ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1314ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 131506705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 131606705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 131725ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1318c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1319ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 132064769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1321dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 13221449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 13231449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 13246fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13256fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1326240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1327b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1328afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 132906705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 133006705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1331744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1332744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13335328e635SEric Sandeen {Opt_discard, "discard"}, 13345328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1335bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable=%u"}, 1336bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable"}, 1337bfff6873SLukas Czerner {Opt_noinit_inode_table, "noinit_itable"}, 1338f3f12faaSJosef Bacik {Opt_err, NULL}, 1339ac27a0ecSDave Kleikamp }; 1340ac27a0ecSDave Kleikamp 1341617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1342ac27a0ecSDave Kleikamp { 1343617ba13bSMingming Cao ext4_fsblk_t sb_block; 1344ac27a0ecSDave Kleikamp char *options = (char *) *data; 1345ac27a0ecSDave Kleikamp 1346ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1347ac27a0ecSDave Kleikamp return 1; /* Default location */ 13480b8e58a1SAndreas Dilger 1349ac27a0ecSDave Kleikamp options += 3; 13500b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1351ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1352ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13534776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1354ac27a0ecSDave Kleikamp (char *) *data); 1355ac27a0ecSDave Kleikamp return 1; 1356ac27a0ecSDave Kleikamp } 1357ac27a0ecSDave Kleikamp if (*options == ',') 1358ac27a0ecSDave Kleikamp options++; 1359ac27a0ecSDave Kleikamp *data = (void *) options; 13600b8e58a1SAndreas Dilger 1361ac27a0ecSDave Kleikamp return sb_block; 1362ac27a0ecSDave Kleikamp } 1363ac27a0ecSDave Kleikamp 1364b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1365437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1366437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1367b3881f74STheodore Ts'o 136856c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 136956c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 137056c50f11SDmitry Monakhov { 137156c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 137256c50f11SDmitry Monakhov char *qname; 137356c50f11SDmitry Monakhov 137456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 137556c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 137656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137756c50f11SDmitry Monakhov "Cannot change journaled " 137856c50f11SDmitry Monakhov "quota options when quota turned on"); 137956c50f11SDmitry Monakhov return 0; 138056c50f11SDmitry Monakhov } 138156c50f11SDmitry Monakhov qname = match_strdup(args); 138256c50f11SDmitry Monakhov if (!qname) { 138356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 138456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 138556c50f11SDmitry Monakhov return 0; 138656c50f11SDmitry Monakhov } 138756c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 138856c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 138956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 139056c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 139156c50f11SDmitry Monakhov kfree(qname); 139256c50f11SDmitry Monakhov return 0; 139356c50f11SDmitry Monakhov } 139456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 139556c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 139656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 139756c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 139856c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 139956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 140056c50f11SDmitry Monakhov return 0; 140156c50f11SDmitry Monakhov } 1402fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 140356c50f11SDmitry Monakhov return 1; 140456c50f11SDmitry Monakhov } 140556c50f11SDmitry Monakhov 140656c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 140756c50f11SDmitry Monakhov { 140856c50f11SDmitry Monakhov 140956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 141056c50f11SDmitry Monakhov 141156c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 141256c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 141356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 141456c50f11SDmitry Monakhov " when quota turned on"); 141556c50f11SDmitry Monakhov return 0; 141656c50f11SDmitry Monakhov } 141756c50f11SDmitry Monakhov /* 141856c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 141956c50f11SDmitry Monakhov * to be correct 142056c50f11SDmitry Monakhov */ 142156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 142256c50f11SDmitry Monakhov return 1; 142356c50f11SDmitry Monakhov } 142456c50f11SDmitry Monakhov #endif 142556c50f11SDmitry Monakhov 1426ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1427c3191067STheodore Ts'o unsigned long *journal_devnum, 1428b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1429617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1430ac27a0ecSDave Kleikamp { 1431617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1432ac27a0ecSDave Kleikamp char *p; 1433ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1434ac27a0ecSDave Kleikamp int data_opt = 0; 1435ac27a0ecSDave Kleikamp int option; 1436ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 143756c50f11SDmitry Monakhov int qfmt; 1438ac27a0ecSDave Kleikamp #endif 1439ac27a0ecSDave Kleikamp 1440ac27a0ecSDave Kleikamp if (!options) 1441ac27a0ecSDave Kleikamp return 1; 1442ac27a0ecSDave Kleikamp 1443ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1444ac27a0ecSDave Kleikamp int token; 1445ac27a0ecSDave Kleikamp if (!*p) 1446ac27a0ecSDave Kleikamp continue; 1447ac27a0ecSDave Kleikamp 144815121c18SEric Sandeen /* 144915121c18SEric Sandeen * Initialize args struct so we know whether arg was 145015121c18SEric Sandeen * found; some options take optional arguments. 145115121c18SEric Sandeen */ 14527dc57615SPeter Huewe args[0].to = args[0].from = NULL; 1453ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1454ac27a0ecSDave Kleikamp switch (token) { 1455ac27a0ecSDave Kleikamp case Opt_bsd_df: 1456437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1457fd8c37ecSTheodore Ts'o clear_opt(sb, MINIX_DF); 1458ac27a0ecSDave Kleikamp break; 1459ac27a0ecSDave Kleikamp case Opt_minix_df: 1460437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1461fd8c37ecSTheodore Ts'o set_opt(sb, MINIX_DF); 1462437ca0fdSDmitry Monakhov 1463ac27a0ecSDave Kleikamp break; 1464ac27a0ecSDave Kleikamp case Opt_grpid: 1465437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1466fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 1467437ca0fdSDmitry Monakhov 1468ac27a0ecSDave Kleikamp break; 1469ac27a0ecSDave Kleikamp case Opt_nogrpid: 1470437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1471fd8c37ecSTheodore Ts'o clear_opt(sb, GRPID); 1472437ca0fdSDmitry Monakhov 1473ac27a0ecSDave Kleikamp break; 1474ac27a0ecSDave Kleikamp case Opt_resuid: 1475ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1476ac27a0ecSDave Kleikamp return 0; 1477ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1478ac27a0ecSDave Kleikamp break; 1479ac27a0ecSDave Kleikamp case Opt_resgid: 1480ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1481ac27a0ecSDave Kleikamp return 0; 1482ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1483ac27a0ecSDave Kleikamp break; 1484ac27a0ecSDave Kleikamp case Opt_sb: 1485ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1486ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1487ac27a0ecSDave Kleikamp break; 1488ac27a0ecSDave Kleikamp case Opt_err_panic: 1489fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1490fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1491fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 1492ac27a0ecSDave Kleikamp break; 1493ac27a0ecSDave Kleikamp case Opt_err_ro: 1494fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1495fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1496fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 1497ac27a0ecSDave Kleikamp break; 1498ac27a0ecSDave Kleikamp case Opt_err_cont: 1499fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1500fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1501fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 1502ac27a0ecSDave Kleikamp break; 1503ac27a0ecSDave Kleikamp case Opt_nouid32: 1504fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 1505ac27a0ecSDave Kleikamp break; 1506ac27a0ecSDave Kleikamp case Opt_debug: 1507fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 1508ac27a0ecSDave Kleikamp break; 1509ac27a0ecSDave Kleikamp case Opt_oldalloc: 1510fd8c37ecSTheodore Ts'o set_opt(sb, OLDALLOC); 1511ac27a0ecSDave Kleikamp break; 1512ac27a0ecSDave Kleikamp case Opt_orlov: 1513fd8c37ecSTheodore Ts'o clear_opt(sb, OLDALLOC); 1514ac27a0ecSDave Kleikamp break; 151503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1516ac27a0ecSDave Kleikamp case Opt_user_xattr: 1517fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 1518ac27a0ecSDave Kleikamp break; 1519ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1520fd8c37ecSTheodore Ts'o clear_opt(sb, XATTR_USER); 1521ac27a0ecSDave Kleikamp break; 1522ac27a0ecSDave Kleikamp #else 1523ac27a0ecSDave Kleikamp case Opt_user_xattr: 1524ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1525b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1526ac27a0ecSDave Kleikamp break; 1527ac27a0ecSDave Kleikamp #endif 152803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1529ac27a0ecSDave Kleikamp case Opt_acl: 1530fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 1531ac27a0ecSDave Kleikamp break; 1532ac27a0ecSDave Kleikamp case Opt_noacl: 1533fd8c37ecSTheodore Ts'o clear_opt(sb, POSIX_ACL); 1534ac27a0ecSDave Kleikamp break; 1535ac27a0ecSDave Kleikamp #else 1536ac27a0ecSDave Kleikamp case Opt_acl: 1537ac27a0ecSDave Kleikamp case Opt_noacl: 1538b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1539ac27a0ecSDave Kleikamp break; 1540ac27a0ecSDave Kleikamp #endif 1541ac27a0ecSDave Kleikamp case Opt_journal_update: 1542ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1543ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1544ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1545ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1546ac27a0ecSDave Kleikamp journal file. */ 1547ac27a0ecSDave Kleikamp if (is_remount) { 1548b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1549b31e1552SEric Sandeen "Cannot specify journal on remount"); 1550ac27a0ecSDave Kleikamp return 0; 1551ac27a0ecSDave Kleikamp } 1552fd8c37ecSTheodore Ts'o set_opt(sb, UPDATE_JOURNAL); 1553ac27a0ecSDave Kleikamp break; 1554ac27a0ecSDave Kleikamp case Opt_journal_dev: 1555ac27a0ecSDave Kleikamp if (is_remount) { 1556b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1557b31e1552SEric Sandeen "Cannot specify journal on remount"); 1558ac27a0ecSDave Kleikamp return 0; 1559ac27a0ecSDave Kleikamp } 1560ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1561ac27a0ecSDave Kleikamp return 0; 1562ac27a0ecSDave Kleikamp *journal_devnum = option; 1563ac27a0ecSDave Kleikamp break; 1564818d276cSGirish Shilamkar case Opt_journal_checksum: 1565fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1566d4da6c9cSLinus Torvalds break; 1567818d276cSGirish Shilamkar case Opt_journal_async_commit: 1568fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_ASYNC_COMMIT); 1569fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1570818d276cSGirish Shilamkar break; 1571ac27a0ecSDave Kleikamp case Opt_noload: 1572fd8c37ecSTheodore Ts'o set_opt(sb, NOLOAD); 1573ac27a0ecSDave Kleikamp break; 1574ac27a0ecSDave Kleikamp case Opt_commit: 1575ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1576ac27a0ecSDave Kleikamp return 0; 1577ac27a0ecSDave Kleikamp if (option < 0) 1578ac27a0ecSDave Kleikamp return 0; 1579ac27a0ecSDave Kleikamp if (option == 0) 1580cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1581ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1582ac27a0ecSDave Kleikamp break; 158330773840STheodore Ts'o case Opt_max_batch_time: 158430773840STheodore Ts'o if (match_int(&args[0], &option)) 158530773840STheodore Ts'o return 0; 158630773840STheodore Ts'o if (option < 0) 158730773840STheodore Ts'o return 0; 158830773840STheodore Ts'o if (option == 0) 158930773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 159030773840STheodore Ts'o sbi->s_max_batch_time = option; 159130773840STheodore Ts'o break; 159230773840STheodore Ts'o case Opt_min_batch_time: 159330773840STheodore Ts'o if (match_int(&args[0], &option)) 159430773840STheodore Ts'o return 0; 159530773840STheodore Ts'o if (option < 0) 159630773840STheodore Ts'o return 0; 159730773840STheodore Ts'o sbi->s_min_batch_time = option; 159830773840STheodore Ts'o break; 1599ac27a0ecSDave Kleikamp case Opt_data_journal: 1600617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1601ac27a0ecSDave Kleikamp goto datacheck; 1602ac27a0ecSDave Kleikamp case Opt_data_ordered: 1603617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1604ac27a0ecSDave Kleikamp goto datacheck; 1605ac27a0ecSDave Kleikamp case Opt_data_writeback: 1606617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1607ac27a0ecSDave Kleikamp datacheck: 1608ac27a0ecSDave Kleikamp if (is_remount) { 1609482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1610b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1611b31e1552SEric Sandeen "Cannot change data mode on remount"); 1612ac27a0ecSDave Kleikamp return 0; 1613ac27a0ecSDave Kleikamp } 1614ac27a0ecSDave Kleikamp } else { 1615fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 1616ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1617ac27a0ecSDave Kleikamp } 1618ac27a0ecSDave Kleikamp break; 16195bf5683aSHidehiro Kawai case Opt_data_err_abort: 1620fd8c37ecSTheodore Ts'o set_opt(sb, DATA_ERR_ABORT); 16215bf5683aSHidehiro Kawai break; 16225bf5683aSHidehiro Kawai case Opt_data_err_ignore: 1623fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_ERR_ABORT); 16245bf5683aSHidehiro Kawai break; 1625ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1626ac27a0ecSDave Kleikamp case Opt_usrjquota: 162756c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 162856c50f11SDmitry Monakhov return 0; 162956c50f11SDmitry Monakhov break; 1630ac27a0ecSDave Kleikamp case Opt_grpjquota: 163156c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1632ac27a0ecSDave Kleikamp return 0; 1633ac27a0ecSDave Kleikamp break; 1634ac27a0ecSDave Kleikamp case Opt_offusrjquota: 163556c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1636ac27a0ecSDave Kleikamp return 0; 1637ac27a0ecSDave Kleikamp break; 163856c50f11SDmitry Monakhov case Opt_offgrpjquota: 163956c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 164056c50f11SDmitry Monakhov return 0; 164156c50f11SDmitry Monakhov break; 164256c50f11SDmitry Monakhov 1643ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1644dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1645dfc5d03fSJan Kara goto set_qf_format; 1646ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1647dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 16485a20bdfcSJan Kara goto set_qf_format; 16495a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 16505a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1651dfc5d03fSJan Kara set_qf_format: 165217bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1653dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1654b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1655dfc5d03fSJan Kara "journaled quota options when " 1656b31e1552SEric Sandeen "quota turned on"); 1657dfc5d03fSJan Kara return 0; 1658dfc5d03fSJan Kara } 1659dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1660ac27a0ecSDave Kleikamp break; 1661ac27a0ecSDave Kleikamp case Opt_quota: 1662ac27a0ecSDave Kleikamp case Opt_usrquota: 1663fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1664fd8c37ecSTheodore Ts'o set_opt(sb, USRQUOTA); 1665ac27a0ecSDave Kleikamp break; 1666ac27a0ecSDave Kleikamp case Opt_grpquota: 1667fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1668fd8c37ecSTheodore Ts'o set_opt(sb, GRPQUOTA); 1669ac27a0ecSDave Kleikamp break; 1670ac27a0ecSDave Kleikamp case Opt_noquota: 167117bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1672b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1673b31e1552SEric Sandeen "options when quota turned on"); 1674ac27a0ecSDave Kleikamp return 0; 1675ac27a0ecSDave Kleikamp } 1676fd8c37ecSTheodore Ts'o clear_opt(sb, QUOTA); 1677fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1678fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1679ac27a0ecSDave Kleikamp break; 1680ac27a0ecSDave Kleikamp #else 1681ac27a0ecSDave Kleikamp case Opt_quota: 1682ac27a0ecSDave Kleikamp case Opt_usrquota: 1683ac27a0ecSDave Kleikamp case Opt_grpquota: 1684b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1685b31e1552SEric Sandeen "quota options not supported"); 1686cd59e7b9SJan Kara break; 1687ac27a0ecSDave Kleikamp case Opt_usrjquota: 1688ac27a0ecSDave Kleikamp case Opt_grpjquota: 1689ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1690ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1691ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1692ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 16935a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1694b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1695b31e1552SEric Sandeen "journaled quota options not supported"); 1696ac27a0ecSDave Kleikamp break; 1697ac27a0ecSDave Kleikamp case Opt_noquota: 1698ac27a0ecSDave Kleikamp break; 1699ac27a0ecSDave Kleikamp #endif 1700ac27a0ecSDave Kleikamp case Opt_abort: 17014ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1702ac27a0ecSDave Kleikamp break; 170306705bffSTheodore Ts'o case Opt_nobarrier: 1704fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 170506705bffSTheodore Ts'o break; 1706ac27a0ecSDave Kleikamp case Opt_barrier: 170715121c18SEric Sandeen if (args[0].from) { 170815121c18SEric Sandeen if (match_int(&args[0], &option)) 170915121c18SEric Sandeen return 0; 171015121c18SEric Sandeen } else 171115121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1712ac27a0ecSDave Kleikamp if (option) 1713fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 1714ac27a0ecSDave Kleikamp else 1715fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 1716ac27a0ecSDave Kleikamp break; 1717ac27a0ecSDave Kleikamp case Opt_ignore: 1718ac27a0ecSDave Kleikamp break; 1719ac27a0ecSDave Kleikamp case Opt_resize: 1720ac27a0ecSDave Kleikamp if (!is_remount) { 1721b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1722b31e1552SEric Sandeen "resize option only available " 1723b31e1552SEric Sandeen "for remount"); 1724ac27a0ecSDave Kleikamp return 0; 1725ac27a0ecSDave Kleikamp } 1726ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1727ac27a0ecSDave Kleikamp return 0; 1728ac27a0ecSDave Kleikamp *n_blocks_count = option; 1729ac27a0ecSDave Kleikamp break; 1730ac27a0ecSDave Kleikamp case Opt_nobh: 1731206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1732206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1733ac27a0ecSDave Kleikamp break; 1734ac27a0ecSDave Kleikamp case Opt_bh: 1735206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1736206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1737ac27a0ecSDave Kleikamp break; 173825ec56b5SJean Noel Cordenner case Opt_i_version: 1739fd8c37ecSTheodore Ts'o set_opt(sb, I_VERSION); 174025ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 174125ec56b5SJean Noel Cordenner break; 1742dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1743fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 1744dd919b98SAneesh Kumar K.V break; 17451449032bSTheodore Ts'o case Opt_mblk_io_submit: 1746fd8c37ecSTheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 17471449032bSTheodore Ts'o break; 17481449032bSTheodore Ts'o case Opt_nomblk_io_submit: 1749fd8c37ecSTheodore Ts'o clear_opt(sb, MBLK_IO_SUBMIT); 17501449032bSTheodore Ts'o break; 1751c9de560dSAlex Tomas case Opt_stripe: 1752c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1753c9de560dSAlex Tomas return 0; 1754c9de560dSAlex Tomas if (option < 0) 1755c9de560dSAlex Tomas return 0; 1756c9de560dSAlex Tomas sbi->s_stripe = option; 1757c9de560dSAlex Tomas break; 175864769240SAlex Tomas case Opt_delalloc: 1759fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 176064769240SAlex Tomas break; 17616fd058f7STheodore Ts'o case Opt_block_validity: 1762fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 17636fd058f7STheodore Ts'o break; 17646fd058f7STheodore Ts'o case Opt_noblock_validity: 1765fd8c37ecSTheodore Ts'o clear_opt(sb, BLOCK_VALIDITY); 17666fd058f7STheodore Ts'o break; 1767240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1768240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1769240799cdSTheodore Ts'o return 0; 1770240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1771240799cdSTheodore Ts'o return 0; 17725dbd571dSAlexander V. Lukyanov if (option && !is_power_of_2(option)) { 1773b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1774b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1775b31e1552SEric Sandeen " must be a power of 2"); 17763197ebdbSTheodore Ts'o return 0; 17773197ebdbSTheodore Ts'o } 1778240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1779240799cdSTheodore Ts'o break; 1780b3881f74STheodore Ts'o case Opt_journal_ioprio: 1781b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1782b3881f74STheodore Ts'o return 0; 1783b3881f74STheodore Ts'o if (option < 0 || option > 7) 1784b3881f74STheodore Ts'o break; 1785b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1786b3881f74STheodore Ts'o option); 1787b3881f74STheodore Ts'o break; 178806705bffSTheodore Ts'o case Opt_noauto_da_alloc: 1789fd8c37ecSTheodore Ts'o set_opt(sb, NO_AUTO_DA_ALLOC); 179006705bffSTheodore Ts'o break; 1791afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 179215121c18SEric Sandeen if (args[0].from) { 179315121c18SEric Sandeen if (match_int(&args[0], &option)) 179415121c18SEric Sandeen return 0; 179515121c18SEric Sandeen } else 179615121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1797afd4672dSTheodore Ts'o if (option) 1798fd8c37ecSTheodore Ts'o clear_opt(sb, NO_AUTO_DA_ALLOC); 1799afd4672dSTheodore Ts'o else 1800fd8c37ecSTheodore Ts'o set_opt(sb,NO_AUTO_DA_ALLOC); 1801afd4672dSTheodore Ts'o break; 18025328e635SEric Sandeen case Opt_discard: 1803fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 18045328e635SEric Sandeen break; 18055328e635SEric Sandeen case Opt_nodiscard: 1806fd8c37ecSTheodore Ts'o clear_opt(sb, DISCARD); 18075328e635SEric Sandeen break; 1808744692dcSJiaying Zhang case Opt_dioread_nolock: 1809fd8c37ecSTheodore Ts'o set_opt(sb, DIOREAD_NOLOCK); 1810744692dcSJiaying Zhang break; 1811744692dcSJiaying Zhang case Opt_dioread_lock: 1812fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 1813744692dcSJiaying Zhang break; 1814bfff6873SLukas Czerner case Opt_init_inode_table: 1815fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 1816bfff6873SLukas Czerner if (args[0].from) { 1817bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1818bfff6873SLukas Czerner return 0; 1819bfff6873SLukas Czerner } else 1820bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1821bfff6873SLukas Czerner if (option < 0) 1822bfff6873SLukas Czerner return 0; 1823bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1824bfff6873SLukas Czerner break; 1825bfff6873SLukas Czerner case Opt_noinit_inode_table: 1826fd8c37ecSTheodore Ts'o clear_opt(sb, INIT_INODE_TABLE); 1827bfff6873SLukas Czerner break; 1828ac27a0ecSDave Kleikamp default: 1829b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1830b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1831b31e1552SEric Sandeen "or missing value", p); 1832ac27a0ecSDave Kleikamp return 0; 1833ac27a0ecSDave Kleikamp } 1834ac27a0ecSDave Kleikamp } 1835ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1836ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1837482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1838fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1839ac27a0ecSDave Kleikamp 1840482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1841fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1842ac27a0ecSDave Kleikamp 184356c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1844b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1845b31e1552SEric Sandeen "format mixing"); 1846ac27a0ecSDave Kleikamp return 0; 1847ac27a0ecSDave Kleikamp } 1848ac27a0ecSDave Kleikamp 1849ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1850b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1851b31e1552SEric Sandeen "not specified"); 1852ac27a0ecSDave Kleikamp return 0; 1853ac27a0ecSDave Kleikamp } 1854ac27a0ecSDave Kleikamp } else { 1855ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1856b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 18572c8be6b2SJan Kara "specified with no journaling " 1858b31e1552SEric Sandeen "enabled"); 1859ac27a0ecSDave Kleikamp return 0; 1860ac27a0ecSDave Kleikamp } 1861ac27a0ecSDave Kleikamp } 1862ac27a0ecSDave Kleikamp #endif 1863ac27a0ecSDave Kleikamp return 1; 1864ac27a0ecSDave Kleikamp } 1865ac27a0ecSDave Kleikamp 1866617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1867ac27a0ecSDave Kleikamp int read_only) 1868ac27a0ecSDave Kleikamp { 1869617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1870ac27a0ecSDave Kleikamp int res = 0; 1871ac27a0ecSDave Kleikamp 1872617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1873b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1874b31e1552SEric Sandeen "forcing read-only mode"); 1875ac27a0ecSDave Kleikamp res = MS_RDONLY; 1876ac27a0ecSDave Kleikamp } 1877ac27a0ecSDave Kleikamp if (read_only) 1878ac27a0ecSDave Kleikamp return res; 1879617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1880b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1881b31e1552SEric Sandeen "running e2fsck is recommended"); 1882617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1883b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1884b31e1552SEric Sandeen "warning: mounting fs with errors, " 1885b31e1552SEric Sandeen "running e2fsck is recommended"); 1886ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1887ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1888ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1889b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1890b31e1552SEric Sandeen "warning: maximal mount count reached, " 1891b31e1552SEric Sandeen "running e2fsck is recommended"); 1892ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1893ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1894ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1895b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1896b31e1552SEric Sandeen "warning: checktime reached, " 1897b31e1552SEric Sandeen "running e2fsck is recommended"); 18980390131bSFrank Mayhar if (!sbi->s_journal) 1899216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1900ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1901617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1902e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1903ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1904617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19050390131bSFrank Mayhar if (sbi->s_journal) 1906617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1907ac27a0ecSDave Kleikamp 1908e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1909ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1910a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1911a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1912ac27a0ecSDave Kleikamp sb->s_blocksize, 1913ac27a0ecSDave Kleikamp sbi->s_groups_count, 1914617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1915617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1916a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1917ac27a0ecSDave Kleikamp 1918ac27a0ecSDave Kleikamp return res; 1919ac27a0ecSDave Kleikamp } 1920ac27a0ecSDave Kleikamp 1921772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1922772cb7c8SJose R. Santos { 1923772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1924772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1925772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1926772cb7c8SJose R. Santos ext4_group_t flex_group; 1927772cb7c8SJose R. Santos int groups_per_flex = 0; 1928c5ca7c76STheodore Ts'o size_t size; 1929772cb7c8SJose R. Santos int i; 1930772cb7c8SJose R. Santos 1931503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1932503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1933503358aeSTheodore Ts'o 1934503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1935772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1936772cb7c8SJose R. Santos return 1; 1937772cb7c8SJose R. Santos } 1938772cb7c8SJose R. Santos 1939c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1940c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1941d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1942d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1943c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1944c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1945c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 194694de56abSJoe Perches sbi->s_flex_groups = vzalloc(size); 1947772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 194894de56abSJoe Perches ext4_msg(sb, KERN_ERR, 194994de56abSJoe Perches "not enough memory for %u flex groups", 195094de56abSJoe Perches flex_group_count); 1951772cb7c8SJose R. Santos goto failed; 1952772cb7c8SJose R. Santos } 195394de56abSJoe Perches } 1954772cb7c8SJose R. Santos 1955772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 195688b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1957772cb7c8SJose R. Santos 1958772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19597ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19607ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 19617ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 19627ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 19637ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19647ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1965772cb7c8SJose R. Santos } 1966772cb7c8SJose R. Santos 1967772cb7c8SJose R. Santos return 1; 1968772cb7c8SJose R. Santos failed: 1969772cb7c8SJose R. Santos return 0; 1970772cb7c8SJose R. Santos } 1971772cb7c8SJose R. Santos 1972717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1973717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1974717d50e4SAndreas Dilger { 1975717d50e4SAndreas Dilger __u16 crc = 0; 1976717d50e4SAndreas Dilger 1977717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1978717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1979717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1980717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1981717d50e4SAndreas Dilger 1982717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1983717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1984717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1985717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1986717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1987717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1988717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1989717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1990717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1991717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1992717d50e4SAndreas Dilger offset); 1993717d50e4SAndreas Dilger } 1994717d50e4SAndreas Dilger 1995717d50e4SAndreas Dilger return cpu_to_le16(crc); 1996717d50e4SAndreas Dilger } 1997717d50e4SAndreas Dilger 1998717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1999717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2000717d50e4SAndreas Dilger { 2001717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 2002717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 2003717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 2004717d50e4SAndreas Dilger return 0; 2005717d50e4SAndreas Dilger 2006717d50e4SAndreas Dilger return 1; 2007717d50e4SAndreas Dilger } 2008717d50e4SAndreas Dilger 2009ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2010bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2011bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2012ac27a0ecSDave Kleikamp { 2013617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2014617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2015617ba13bSMingming Cao ext4_fsblk_t last_block; 2016bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2017bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2018bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2019ce421581SJose R. Santos int flexbg_flag = 0; 2020bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2021ac27a0ecSDave Kleikamp 2022ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2023ce421581SJose R. Santos flexbg_flag = 1; 2024ce421581SJose R. Santos 2025617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2026ac27a0ecSDave Kleikamp 2027197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2028197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2029197cd65aSAkinobu Mita 2030ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2031bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2032ac27a0ecSDave Kleikamp else 2033ac27a0ecSDave Kleikamp last_block = first_block + 2034617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2035ac27a0ecSDave Kleikamp 2036bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2037bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2038bfff6873SLukas Czerner grp = i; 2039bfff6873SLukas Czerner 20408fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20412b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2042b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2043a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2044b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2045ac27a0ecSDave Kleikamp return 0; 2046ac27a0ecSDave Kleikamp } 20478fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20482b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2049b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2050a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2051b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2052ac27a0ecSDave Kleikamp return 0; 2053ac27a0ecSDave Kleikamp } 20548fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2055bd81d8eeSLaurent Vivier if (inode_table < first_block || 20562b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2057b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2058a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2059b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2060ac27a0ecSDave Kleikamp return 0; 2061ac27a0ecSDave Kleikamp } 2062955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2063717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2064b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2065b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2066fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2067fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20687ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2069955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2070717d50e4SAndreas Dilger return 0; 2071717d50e4SAndreas Dilger } 20727ee1ec4cSLi Zefan } 2073955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2074ce421581SJose R. Santos if (!flexbg_flag) 2075617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2076ac27a0ecSDave Kleikamp } 2077bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2078bfff6873SLukas Czerner *first_not_zeroed = grp; 2079ac27a0ecSDave Kleikamp 2080bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 2081617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2082ac27a0ecSDave Kleikamp return 1; 2083ac27a0ecSDave Kleikamp } 2084ac27a0ecSDave Kleikamp 2085617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2086ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2087ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2088ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2089ac27a0ecSDave Kleikamp * 2090ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2091ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2092ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2093ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2094ac27a0ecSDave Kleikamp * 2095ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2096ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2097ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2098617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2099ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2100ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2101ac27a0ecSDave Kleikamp */ 2102617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2103617ba13bSMingming Cao struct ext4_super_block *es) 2104ac27a0ecSDave Kleikamp { 2105ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2106ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2107ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2108ac27a0ecSDave Kleikamp int i; 2109ac27a0ecSDave Kleikamp #endif 2110ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2111ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2112ac27a0ecSDave Kleikamp return; 2113ac27a0ecSDave Kleikamp } 2114ac27a0ecSDave Kleikamp 2115a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2116b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2117b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2118a8f48a95SEric Sandeen return; 2119a8f48a95SEric Sandeen } 2120a8f48a95SEric Sandeen 2121*d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2122*d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2123*d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2124*d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2125*d39195c3SAmir Goldstein return; 2126*d39195c3SAmir Goldstein } 2127*d39195c3SAmir Goldstein 2128617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2129ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2130ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2131ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2132ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2133ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2134ac27a0ecSDave Kleikamp return; 2135ac27a0ecSDave Kleikamp } 2136ac27a0ecSDave Kleikamp 2137ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2138b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2139ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2140ac27a0ecSDave Kleikamp } 2141ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2142ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2143ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2144ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2145ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2146617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2147617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2148ac27a0ecSDave Kleikamp if (ret < 0) 2149b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2150b31e1552SEric Sandeen "Cannot turn on journaled " 2151b31e1552SEric Sandeen "quota: error %d", ret); 2152ac27a0ecSDave Kleikamp } 2153ac27a0ecSDave Kleikamp } 2154ac27a0ecSDave Kleikamp #endif 2155ac27a0ecSDave Kleikamp 2156ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2157ac27a0ecSDave Kleikamp struct inode *inode; 2158ac27a0ecSDave Kleikamp 215997bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 216097bd42b9SJosef Bacik if (IS_ERR(inode)) { 2161ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2162ac27a0ecSDave Kleikamp break; 2163ac27a0ecSDave Kleikamp } 2164ac27a0ecSDave Kleikamp 2165617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2166871a2931SChristoph Hellwig dquot_initialize(inode); 2167ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2168b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2169b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 217046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2171e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2172ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2173617ba13bSMingming Cao ext4_truncate(inode); 2174ac27a0ecSDave Kleikamp nr_truncates++; 2175ac27a0ecSDave Kleikamp } else { 2176b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2177b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 217846e665e9SHarvey Harrison __func__, inode->i_ino); 2179ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2180ac27a0ecSDave Kleikamp inode->i_ino); 2181ac27a0ecSDave Kleikamp nr_orphans++; 2182ac27a0ecSDave Kleikamp } 2183ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2184ac27a0ecSDave Kleikamp } 2185ac27a0ecSDave Kleikamp 2186ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2187ac27a0ecSDave Kleikamp 2188ac27a0ecSDave Kleikamp if (nr_orphans) 2189b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2190b31e1552SEric Sandeen PLURAL(nr_orphans)); 2191ac27a0ecSDave Kleikamp if (nr_truncates) 2192b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2193b31e1552SEric Sandeen PLURAL(nr_truncates)); 2194ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2195ac27a0ecSDave Kleikamp /* Turn quotas off */ 2196ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2197ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2198287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2199ac27a0ecSDave Kleikamp } 2200ac27a0ecSDave Kleikamp #endif 2201ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2202ac27a0ecSDave Kleikamp } 22030b8e58a1SAndreas Dilger 2204cd2291a4SEric Sandeen /* 2205cd2291a4SEric Sandeen * Maximal extent format file size. 2206cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2207cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2208cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2209cd2291a4SEric Sandeen * so that won't be a limiting factor. 2210cd2291a4SEric Sandeen * 2211cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2212cd2291a4SEric Sandeen */ 2213f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2214cd2291a4SEric Sandeen { 2215cd2291a4SEric Sandeen loff_t res; 2216cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2217cd2291a4SEric Sandeen 2218cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2219f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2220cd2291a4SEric Sandeen /* 222190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2222cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2223cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2224cd2291a4SEric Sandeen */ 2225cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2226cd2291a4SEric Sandeen 2227cd2291a4SEric Sandeen /* total blocks in file system block size */ 2228cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2229cd2291a4SEric Sandeen upper_limit <<= blkbits; 2230cd2291a4SEric Sandeen } 2231cd2291a4SEric Sandeen 2232cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2233cd2291a4SEric Sandeen res = 1LL << 32; 2234cd2291a4SEric Sandeen res <<= blkbits; 2235cd2291a4SEric Sandeen res -= 1; 2236cd2291a4SEric Sandeen 2237cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2238cd2291a4SEric Sandeen if (res > upper_limit) 2239cd2291a4SEric Sandeen res = upper_limit; 2240cd2291a4SEric Sandeen 2241cd2291a4SEric Sandeen return res; 2242cd2291a4SEric Sandeen } 2243ac27a0ecSDave Kleikamp 2244ac27a0ecSDave Kleikamp /* 2245cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22460fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22470fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2248ac27a0ecSDave Kleikamp */ 2249f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2250ac27a0ecSDave Kleikamp { 2251617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22520fc1b451SAneesh Kumar K.V int meta_blocks; 22530fc1b451SAneesh Kumar K.V loff_t upper_limit; 22540b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22550b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22560b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22570b8e58a1SAndreas Dilger * 22580b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22590b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22600fc1b451SAneesh Kumar K.V */ 22610fc1b451SAneesh Kumar K.V 2262f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22630fc1b451SAneesh Kumar K.V /* 226490c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22650b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22660b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 22670fc1b451SAneesh Kumar K.V */ 22680fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 22690fc1b451SAneesh Kumar K.V 22700fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 22710fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 22720fc1b451SAneesh Kumar K.V 22730fc1b451SAneesh Kumar K.V } else { 22748180a562SAneesh Kumar K.V /* 22758180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 22768180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 22778180a562SAneesh Kumar K.V * represent total number of blocks in 22788180a562SAneesh Kumar K.V * file system block size 22798180a562SAneesh Kumar K.V */ 22800fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 22810fc1b451SAneesh Kumar K.V 22820fc1b451SAneesh Kumar K.V } 22830fc1b451SAneesh Kumar K.V 22840fc1b451SAneesh Kumar K.V /* indirect blocks */ 22850fc1b451SAneesh Kumar K.V meta_blocks = 1; 22860fc1b451SAneesh Kumar K.V /* double indirect blocks */ 22870fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 22880fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 22890fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 22900fc1b451SAneesh Kumar K.V 22910fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 22920fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2293ac27a0ecSDave Kleikamp 2294ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2295ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2296ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2297ac27a0ecSDave Kleikamp res <<= bits; 2298ac27a0ecSDave Kleikamp if (res > upper_limit) 2299ac27a0ecSDave Kleikamp res = upper_limit; 23000fc1b451SAneesh Kumar K.V 23010fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23020fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23030fc1b451SAneesh Kumar K.V 2304ac27a0ecSDave Kleikamp return res; 2305ac27a0ecSDave Kleikamp } 2306ac27a0ecSDave Kleikamp 2307617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 230870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2309ac27a0ecSDave Kleikamp { 2310617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2311fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2312ac27a0ecSDave Kleikamp int has_super = 0; 2313ac27a0ecSDave Kleikamp 2314ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2315ac27a0ecSDave Kleikamp 2316617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2317ac27a0ecSDave Kleikamp nr < first_meta_bg) 231870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2319ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2320617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2321ac27a0ecSDave Kleikamp has_super = 1; 23220b8e58a1SAndreas Dilger 2323617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2324ac27a0ecSDave Kleikamp } 2325ac27a0ecSDave Kleikamp 2326c9de560dSAlex Tomas /** 2327c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2328c9de560dSAlex Tomas * @sbi: In memory super block info 2329c9de560dSAlex Tomas * 2330c9de560dSAlex Tomas * If we have specified it via mount option, then 2331c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2332c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2333c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2334c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2335c9de560dSAlex Tomas * 2336c9de560dSAlex Tomas */ 2337c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2338c9de560dSAlex Tomas { 2339c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2340c9de560dSAlex Tomas unsigned long stripe_width = 2341c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2342c9de560dSAlex Tomas 2343c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2344c9de560dSAlex Tomas return sbi->s_stripe; 2345c9de560dSAlex Tomas 2346c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2347c9de560dSAlex Tomas return stripe_width; 2348c9de560dSAlex Tomas 2349c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2350c9de560dSAlex Tomas return stride; 2351c9de560dSAlex Tomas 2352c9de560dSAlex Tomas return 0; 2353c9de560dSAlex Tomas } 2354ac27a0ecSDave Kleikamp 23553197ebdbSTheodore Ts'o /* sysfs supprt */ 23563197ebdbSTheodore Ts'o 23573197ebdbSTheodore Ts'o struct ext4_attr { 23583197ebdbSTheodore Ts'o struct attribute attr; 23593197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23603197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23613197ebdbSTheodore Ts'o const char *, size_t); 23623197ebdbSTheodore Ts'o int offset; 23633197ebdbSTheodore Ts'o }; 23643197ebdbSTheodore Ts'o 23653197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23663197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 23673197ebdbSTheodore Ts'o { 23683197ebdbSTheodore Ts'o char *endp; 23693197ebdbSTheodore Ts'o 2370e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2371e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 23723197ebdbSTheodore Ts'o if (*endp || *value > max) 23733197ebdbSTheodore Ts'o return -EINVAL; 23743197ebdbSTheodore Ts'o 23753197ebdbSTheodore Ts'o return 0; 23763197ebdbSTheodore Ts'o } 23773197ebdbSTheodore Ts'o 23783197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 23793197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23803197ebdbSTheodore Ts'o char *buf) 23813197ebdbSTheodore Ts'o { 23823197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 23833197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 23843197ebdbSTheodore Ts'o } 23853197ebdbSTheodore Ts'o 23863197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 23873197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23883197ebdbSTheodore Ts'o { 23893197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23903197ebdbSTheodore Ts'o 2391f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2392f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23933197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 23943197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 23953197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 23963197ebdbSTheodore Ts'o } 23973197ebdbSTheodore Ts'o 23983197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 23993197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24003197ebdbSTheodore Ts'o { 24013197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24023197ebdbSTheodore Ts'o 2403f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2404f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24053197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2406a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24073197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2408a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24093197ebdbSTheodore Ts'o } 24103197ebdbSTheodore Ts'o 24113197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24123197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24133197ebdbSTheodore Ts'o const char *buf, size_t count) 24143197ebdbSTheodore Ts'o { 24153197ebdbSTheodore Ts'o unsigned long t; 24163197ebdbSTheodore Ts'o 24173197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24183197ebdbSTheodore Ts'o return -EINVAL; 24193197ebdbSTheodore Ts'o 24205dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24213197ebdbSTheodore Ts'o return -EINVAL; 24223197ebdbSTheodore Ts'o 24233197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24243197ebdbSTheodore Ts'o return count; 24253197ebdbSTheodore Ts'o } 24263197ebdbSTheodore Ts'o 24273197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24283197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24293197ebdbSTheodore Ts'o { 24303197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24313197ebdbSTheodore Ts'o 24323197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24333197ebdbSTheodore Ts'o } 24343197ebdbSTheodore Ts'o 24353197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24363197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24373197ebdbSTheodore Ts'o const char *buf, size_t count) 24383197ebdbSTheodore Ts'o { 24393197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24403197ebdbSTheodore Ts'o unsigned long t; 24413197ebdbSTheodore Ts'o 24423197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24433197ebdbSTheodore Ts'o return -EINVAL; 24443197ebdbSTheodore Ts'o *ui = t; 24453197ebdbSTheodore Ts'o return count; 24463197ebdbSTheodore Ts'o } 24473197ebdbSTheodore Ts'o 24483197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24493197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24503197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24513197ebdbSTheodore Ts'o .show = _show, \ 24523197ebdbSTheodore Ts'o .store = _store, \ 24533197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24543197ebdbSTheodore Ts'o } 24553197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 24563197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 24573197ebdbSTheodore Ts'o 2458857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 24593197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 24603197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 24613197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 24623197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 24633197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 24643197ebdbSTheodore Ts'o 24653197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 24663197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 24673197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 24683197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 24693197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 247011013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 24713197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 24723197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 24733197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 24743197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 24753197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 24763197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 247755138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 24783197ebdbSTheodore Ts'o 24793197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 24803197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 24813197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 24823197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 24833197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 248411013911SAndreas Dilger ATTR_LIST(inode_goal), 24853197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 24863197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 24873197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 24883197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 24893197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 24903197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 249155138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 24923197ebdbSTheodore Ts'o NULL, 24933197ebdbSTheodore Ts'o }; 24943197ebdbSTheodore Ts'o 2495857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2496857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 249727ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2498857ac889SLukas Czerner 2499857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2500857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 250127ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2502857ac889SLukas Czerner NULL, 2503857ac889SLukas Czerner }; 2504857ac889SLukas Czerner 25053197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25063197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25073197ebdbSTheodore Ts'o { 25083197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25093197ebdbSTheodore Ts'o s_kobj); 25103197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25113197ebdbSTheodore Ts'o 25123197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25133197ebdbSTheodore Ts'o } 25143197ebdbSTheodore Ts'o 25153197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25163197ebdbSTheodore Ts'o struct attribute *attr, 25173197ebdbSTheodore Ts'o const char *buf, size_t len) 25183197ebdbSTheodore Ts'o { 25193197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25203197ebdbSTheodore Ts'o s_kobj); 25213197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25223197ebdbSTheodore Ts'o 25233197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25243197ebdbSTheodore Ts'o } 25253197ebdbSTheodore Ts'o 25263197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25273197ebdbSTheodore Ts'o { 25283197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25293197ebdbSTheodore Ts'o s_kobj); 25303197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25313197ebdbSTheodore Ts'o } 25323197ebdbSTheodore Ts'o 253352cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25343197ebdbSTheodore Ts'o .show = ext4_attr_show, 25353197ebdbSTheodore Ts'o .store = ext4_attr_store, 25363197ebdbSTheodore Ts'o }; 25373197ebdbSTheodore Ts'o 25383197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 25393197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25403197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25413197ebdbSTheodore Ts'o .release = ext4_sb_release, 25423197ebdbSTheodore Ts'o }; 25433197ebdbSTheodore Ts'o 2544857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2545857ac889SLukas Czerner { 2546857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2547857ac889SLukas Czerner } 2548857ac889SLukas Czerner 2549857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2550857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2551857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2552857ac889SLukas Czerner .release = ext4_feat_release, 2553857ac889SLukas Czerner }; 2554857ac889SLukas Czerner 2555a13fb1a4SEric Sandeen /* 2556a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2557a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2558a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2559a13fb1a4SEric Sandeen * 0 if it cannot be. 2560a13fb1a4SEric Sandeen */ 2561a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2562a13fb1a4SEric Sandeen { 2563a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2564a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2565a13fb1a4SEric Sandeen "Couldn't mount because of " 2566a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2567a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2568a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2569a13fb1a4SEric Sandeen return 0; 2570a13fb1a4SEric Sandeen } 2571a13fb1a4SEric Sandeen 2572a13fb1a4SEric Sandeen if (readonly) 2573a13fb1a4SEric Sandeen return 1; 2574a13fb1a4SEric Sandeen 2575a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2576a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2577a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2578a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2579a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2580a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2581a13fb1a4SEric Sandeen return 0; 2582a13fb1a4SEric Sandeen } 2583a13fb1a4SEric Sandeen /* 2584a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2585a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2586a13fb1a4SEric Sandeen */ 2587a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2588a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2589a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2590a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2591a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2592a13fb1a4SEric Sandeen return 0; 2593a13fb1a4SEric Sandeen } 2594a13fb1a4SEric Sandeen } 2595a13fb1a4SEric Sandeen return 1; 2596a13fb1a4SEric Sandeen } 2597a13fb1a4SEric Sandeen 259866e61a9eSTheodore Ts'o /* 259966e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 260066e61a9eSTheodore Ts'o * on the file system 260166e61a9eSTheodore Ts'o */ 260266e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 260366e61a9eSTheodore Ts'o { 260466e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 260566e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 260666e61a9eSTheodore Ts'o struct ext4_super_block *es; 260766e61a9eSTheodore Ts'o 260866e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 260966e61a9eSTheodore Ts'o es = sbi->s_es; 261066e61a9eSTheodore Ts'o 261166e61a9eSTheodore Ts'o if (es->s_error_count) 261266e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 261366e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 261466e61a9eSTheodore Ts'o if (es->s_first_error_time) { 261566e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 261666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 261766e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 261866e61a9eSTheodore Ts'o es->s_first_error_func, 261966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 262066e61a9eSTheodore Ts'o if (es->s_first_error_ino) 262166e61a9eSTheodore Ts'o printk(": inode %u", 262266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 262366e61a9eSTheodore Ts'o if (es->s_first_error_block) 262466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 262566e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 262666e61a9eSTheodore Ts'o printk("\n"); 262766e61a9eSTheodore Ts'o } 262866e61a9eSTheodore Ts'o if (es->s_last_error_time) { 262966e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 263066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 263166e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 263266e61a9eSTheodore Ts'o es->s_last_error_func, 263366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 263466e61a9eSTheodore Ts'o if (es->s_last_error_ino) 263566e61a9eSTheodore Ts'o printk(": inode %u", 263666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 263766e61a9eSTheodore Ts'o if (es->s_last_error_block) 263866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 263966e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 264066e61a9eSTheodore Ts'o printk("\n"); 264166e61a9eSTheodore Ts'o } 264266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 264366e61a9eSTheodore Ts'o } 264466e61a9eSTheodore Ts'o 2645bfff6873SLukas Czerner static void ext4_lazyinode_timeout(unsigned long data) 2646bfff6873SLukas Czerner { 2647bfff6873SLukas Czerner struct task_struct *p = (struct task_struct *)data; 2648bfff6873SLukas Czerner wake_up_process(p); 2649bfff6873SLukas Czerner } 2650bfff6873SLukas Czerner 2651bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2652bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2653bfff6873SLukas Czerner { 2654bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2655bfff6873SLukas Czerner ext4_group_t group, ngroups; 2656bfff6873SLukas Czerner struct super_block *sb; 2657bfff6873SLukas Czerner unsigned long timeout = 0; 2658bfff6873SLukas Czerner int ret = 0; 2659bfff6873SLukas Czerner 2660bfff6873SLukas Czerner sb = elr->lr_super; 2661bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2662bfff6873SLukas Czerner 2663bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2664bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2665bfff6873SLukas Czerner if (!gdp) { 2666bfff6873SLukas Czerner ret = 1; 2667bfff6873SLukas Czerner break; 2668bfff6873SLukas Czerner } 2669bfff6873SLukas Czerner 2670bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2671bfff6873SLukas Czerner break; 2672bfff6873SLukas Czerner } 2673bfff6873SLukas Czerner 2674bfff6873SLukas Czerner if (group == ngroups) 2675bfff6873SLukas Czerner ret = 1; 2676bfff6873SLukas Czerner 2677bfff6873SLukas Czerner if (!ret) { 2678bfff6873SLukas Czerner timeout = jiffies; 2679bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2680bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2681bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 2682bfff6873SLukas Czerner timeout = jiffies - timeout; 2683bfff6873SLukas Czerner if (elr->lr_sbi->s_li_wait_mult) 2684bfff6873SLukas Czerner timeout *= elr->lr_sbi->s_li_wait_mult; 2685bfff6873SLukas Czerner else 2686bfff6873SLukas Czerner timeout *= 20; 2687bfff6873SLukas Czerner elr->lr_timeout = timeout; 2688bfff6873SLukas Czerner } 2689bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2690bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2691bfff6873SLukas Czerner } 2692bfff6873SLukas Czerner 2693bfff6873SLukas Czerner return ret; 2694bfff6873SLukas Czerner } 2695bfff6873SLukas Czerner 2696bfff6873SLukas Czerner /* 2697bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 2698bfff6873SLukas Czerner * request tructure. Should be called with li_list_mtx held 2699bfff6873SLukas Czerner */ 2700bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2701bfff6873SLukas Czerner { 2702bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2703bfff6873SLukas Czerner 2704bfff6873SLukas Czerner if (!elr) 2705bfff6873SLukas Czerner return; 2706bfff6873SLukas Czerner 2707bfff6873SLukas Czerner sbi = elr->lr_sbi; 2708bfff6873SLukas Czerner 2709bfff6873SLukas Czerner list_del(&elr->lr_request); 2710bfff6873SLukas Czerner sbi->s_li_request = NULL; 2711bfff6873SLukas Czerner kfree(elr); 2712bfff6873SLukas Czerner } 2713bfff6873SLukas Czerner 2714bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2715bfff6873SLukas Czerner { 2716bfff6873SLukas Czerner struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; 2717bfff6873SLukas Czerner 2718bfff6873SLukas Czerner if (!ext4_li_info) 2719bfff6873SLukas Czerner return; 2720bfff6873SLukas Czerner 2721bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2722bfff6873SLukas Czerner ext4_remove_li_request(elr); 2723bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2724bfff6873SLukas Czerner } 2725bfff6873SLukas Czerner 27268f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 27278f1f7453SEric Sandeen 2728bfff6873SLukas Czerner /* 2729bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2730bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2731bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2732bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2733bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2734bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2735bfff6873SLukas Czerner * next waking time and put itself into sleep. 2736bfff6873SLukas Czerner */ 2737bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2738bfff6873SLukas Czerner { 2739bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2740bfff6873SLukas Czerner struct list_head *pos, *n; 2741bfff6873SLukas Czerner struct ext4_li_request *elr; 2742bfff6873SLukas Czerner unsigned long next_wakeup; 2743bfff6873SLukas Czerner DEFINE_WAIT(wait); 2744bfff6873SLukas Czerner 2745bfff6873SLukas Czerner BUG_ON(NULL == eli); 2746bfff6873SLukas Czerner 2747bfff6873SLukas Czerner eli->li_timer.data = (unsigned long)current; 2748bfff6873SLukas Czerner eli->li_timer.function = ext4_lazyinode_timeout; 2749bfff6873SLukas Czerner 2750bfff6873SLukas Czerner eli->li_task = current; 2751bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2752bfff6873SLukas Czerner 2753bfff6873SLukas Czerner cont_thread: 2754bfff6873SLukas Czerner while (true) { 2755bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2756bfff6873SLukas Czerner 2757bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2758bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2759bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2760bfff6873SLukas Czerner goto exit_thread; 2761bfff6873SLukas Czerner } 2762bfff6873SLukas Czerner 2763bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2764bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2765bfff6873SLukas Czerner lr_request); 2766bfff6873SLukas Czerner 2767b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2768b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2769b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2770bfff6873SLukas Czerner ext4_remove_li_request(elr); 2771bfff6873SLukas Czerner continue; 2772bfff6873SLukas Czerner } 2773b2c78cd0STheodore Ts'o } 2774bfff6873SLukas Czerner 2775bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2776bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2777bfff6873SLukas Czerner } 2778bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2779bfff6873SLukas Czerner 2780bfff6873SLukas Czerner if (freezing(current)) 2781bfff6873SLukas Czerner refrigerator(); 2782bfff6873SLukas Czerner 2783f4245bd4SLukas Czerner if ((time_after_eq(jiffies, next_wakeup)) || 2784f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2785bfff6873SLukas Czerner cond_resched(); 2786bfff6873SLukas Czerner continue; 2787bfff6873SLukas Czerner } 2788bfff6873SLukas Czerner 2789bfff6873SLukas Czerner eli->li_timer.expires = next_wakeup; 2790bfff6873SLukas Czerner add_timer(&eli->li_timer); 2791bfff6873SLukas Czerner prepare_to_wait(&eli->li_wait_daemon, &wait, 2792bfff6873SLukas Czerner TASK_INTERRUPTIBLE); 2793bfff6873SLukas Czerner if (time_before(jiffies, next_wakeup)) 2794bfff6873SLukas Czerner schedule(); 2795bfff6873SLukas Czerner finish_wait(&eli->li_wait_daemon, &wait); 27968f1f7453SEric Sandeen if (kthread_should_stop()) { 27978f1f7453SEric Sandeen ext4_clear_request_list(); 27988f1f7453SEric Sandeen goto exit_thread; 27998f1f7453SEric Sandeen } 2800bfff6873SLukas Czerner } 2801bfff6873SLukas Czerner 2802bfff6873SLukas Czerner exit_thread: 2803bfff6873SLukas Czerner /* 2804bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2805bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2806bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2807bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2808bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2809bfff6873SLukas Czerner * new one. 2810bfff6873SLukas Czerner */ 2811bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2812bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2813bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2814bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2815bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2816bfff6873SLukas Czerner goto cont_thread; 2817bfff6873SLukas Czerner } 2818bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2819bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2820bfff6873SLukas Czerner eli->li_task = NULL; 2821bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2822bfff6873SLukas Czerner 2823bfff6873SLukas Czerner kfree(ext4_li_info); 28248f1f7453SEric Sandeen ext4_lazyinit_task = NULL; 2825bfff6873SLukas Czerner ext4_li_info = NULL; 2826bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2827bfff6873SLukas Czerner 2828bfff6873SLukas Czerner return 0; 2829bfff6873SLukas Czerner } 2830bfff6873SLukas Czerner 2831bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2832bfff6873SLukas Czerner { 2833bfff6873SLukas Czerner struct list_head *pos, *n; 2834bfff6873SLukas Czerner struct ext4_li_request *elr; 2835bfff6873SLukas Czerner 2836bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2837bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2838bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2839bfff6873SLukas Czerner lr_request); 2840bfff6873SLukas Czerner ext4_remove_li_request(elr); 2841bfff6873SLukas Czerner } 2842bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2843bfff6873SLukas Czerner } 2844bfff6873SLukas Czerner 2845bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2846bfff6873SLukas Czerner { 28478f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 28488f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 28498f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 28508f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2851bfff6873SLukas Czerner ext4_clear_request_list(); 2852bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2853bfff6873SLukas Czerner kfree(ext4_li_info); 2854bfff6873SLukas Czerner ext4_li_info = NULL; 2855bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2856bfff6873SLukas Czerner "initialization thread\n", 2857bfff6873SLukas Czerner err); 2858bfff6873SLukas Czerner return err; 2859bfff6873SLukas Czerner } 2860bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2861bfff6873SLukas Czerner 2862bfff6873SLukas Czerner wait_event(ext4_li_info->li_wait_task, ext4_li_info->li_task != NULL); 2863bfff6873SLukas Czerner return 0; 2864bfff6873SLukas Czerner } 2865bfff6873SLukas Czerner 2866bfff6873SLukas Czerner /* 2867bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2868bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2869bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2870bfff6873SLukas Czerner * groups and return total number of groups. 2871bfff6873SLukas Czerner */ 2872bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2873bfff6873SLukas Czerner { 2874bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2875bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2876bfff6873SLukas Czerner 2877bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2878bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2879bfff6873SLukas Czerner if (!gdp) 2880bfff6873SLukas Czerner continue; 2881bfff6873SLukas Czerner 2882bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2883bfff6873SLukas Czerner break; 2884bfff6873SLukas Czerner } 2885bfff6873SLukas Czerner 2886bfff6873SLukas Czerner return group; 2887bfff6873SLukas Czerner } 2888bfff6873SLukas Czerner 2889bfff6873SLukas Czerner static int ext4_li_info_new(void) 2890bfff6873SLukas Czerner { 2891bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2892bfff6873SLukas Czerner 2893bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2894bfff6873SLukas Czerner if (!eli) 2895bfff6873SLukas Czerner return -ENOMEM; 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner eli->li_task = NULL; 2898bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2899bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2900bfff6873SLukas Czerner 2901bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_daemon); 2902bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_task); 2903bfff6873SLukas Czerner init_timer(&eli->li_timer); 2904bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2905bfff6873SLukas Czerner 2906bfff6873SLukas Czerner ext4_li_info = eli; 2907bfff6873SLukas Czerner 2908bfff6873SLukas Czerner return 0; 2909bfff6873SLukas Czerner } 2910bfff6873SLukas Czerner 2911bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2912bfff6873SLukas Czerner ext4_group_t start) 2913bfff6873SLukas Czerner { 2914bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2915bfff6873SLukas Czerner struct ext4_li_request *elr; 2916bfff6873SLukas Czerner unsigned long rnd; 2917bfff6873SLukas Czerner 2918bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2919bfff6873SLukas Czerner if (!elr) 2920bfff6873SLukas Czerner return NULL; 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner elr->lr_super = sb; 2923bfff6873SLukas Czerner elr->lr_sbi = sbi; 2924bfff6873SLukas Czerner elr->lr_next_group = start; 2925bfff6873SLukas Czerner 2926bfff6873SLukas Czerner /* 2927bfff6873SLukas Czerner * Randomize first schedule time of the request to 2928bfff6873SLukas Czerner * spread the inode table initialization requests 2929bfff6873SLukas Czerner * better. 2930bfff6873SLukas Czerner */ 2931bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2932bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2933bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2934bfff6873SLukas Czerner 2935bfff6873SLukas Czerner return elr; 2936bfff6873SLukas Czerner } 2937bfff6873SLukas Czerner 2938bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2939bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2940bfff6873SLukas Czerner { 2941bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2942bfff6873SLukas Czerner struct ext4_li_request *elr; 2943bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 29446c5a6cb9SAndrew Morton int ret = 0; 2945bfff6873SLukas Czerner 2946bfff6873SLukas Czerner if (sbi->s_li_request != NULL) 2947beed5ecbSNicolas Kaiser return 0; 2948bfff6873SLukas Czerner 2949bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2950bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 2951bfff6873SLukas Czerner !test_opt(sb, INIT_INODE_TABLE)) { 2952bfff6873SLukas Czerner sbi->s_li_request = NULL; 2953beed5ecbSNicolas Kaiser return 0; 2954bfff6873SLukas Czerner } 2955bfff6873SLukas Czerner 2956bfff6873SLukas Czerner if (first_not_zeroed == ngroups) { 2957bfff6873SLukas Czerner sbi->s_li_request = NULL; 2958beed5ecbSNicolas Kaiser return 0; 2959bfff6873SLukas Czerner } 2960bfff6873SLukas Czerner 2961bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2962beed5ecbSNicolas Kaiser if (!elr) 2963beed5ecbSNicolas Kaiser return -ENOMEM; 2964bfff6873SLukas Czerner 2965bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2966bfff6873SLukas Czerner 2967bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2968bfff6873SLukas Czerner ret = ext4_li_info_new(); 2969bfff6873SLukas Czerner if (ret) 2970bfff6873SLukas Czerner goto out; 2971bfff6873SLukas Czerner } 2972bfff6873SLukas Czerner 2973bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2974bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2975bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2976bfff6873SLukas Czerner 2977bfff6873SLukas Czerner sbi->s_li_request = elr; 2978bfff6873SLukas Czerner 2979bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2980bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2981bfff6873SLukas Czerner if (ret) 2982bfff6873SLukas Czerner goto out; 2983bfff6873SLukas Czerner } 2984bfff6873SLukas Czerner out: 2985bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2986beed5ecbSNicolas Kaiser if (ret) 2987bfff6873SLukas Czerner kfree(elr); 2988bfff6873SLukas Czerner return ret; 2989bfff6873SLukas Czerner } 2990bfff6873SLukas Czerner 2991bfff6873SLukas Czerner /* 2992bfff6873SLukas Czerner * We do not need to lock anything since this is called on 2993bfff6873SLukas Czerner * module unload. 2994bfff6873SLukas Czerner */ 2995bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 2996bfff6873SLukas Czerner { 2997bfff6873SLukas Czerner /* 2998bfff6873SLukas Czerner * If thread exited earlier 2999bfff6873SLukas Czerner * there's nothing to be done. 3000bfff6873SLukas Czerner */ 30018f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3002bfff6873SLukas Czerner return; 3003bfff6873SLukas Czerner 30048f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3005bfff6873SLukas Czerner } 3006bfff6873SLukas Czerner 3007617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 30087477827fSAneesh Kumar K.V __releases(kernel_lock) 30097477827fSAneesh Kumar K.V __acquires(kernel_lock) 3010ac27a0ecSDave Kleikamp { 3011d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3012ac27a0ecSDave Kleikamp struct buffer_head *bh; 3013617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3014617ba13bSMingming Cao struct ext4_sb_info *sbi; 3015617ba13bSMingming Cao ext4_fsblk_t block; 3016617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 301770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3018ac27a0ecSDave Kleikamp unsigned long offset = 0; 3019ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3020ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3021ac27a0ecSDave Kleikamp struct inode *root; 30229f6200bbSTheodore Ts'o char *cp; 30230390131bSFrank Mayhar const char *descr; 3024dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3025ac27a0ecSDave Kleikamp int blocksize; 30264ec11028STheodore Ts'o unsigned int db_count; 30274ec11028STheodore Ts'o unsigned int i; 3028f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 3029bd81d8eeSLaurent Vivier __u64 blocks_count; 3030833f4077SPeter Zijlstra int err; 3031b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3032bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3033ac27a0ecSDave Kleikamp 3034ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3035ac27a0ecSDave Kleikamp if (!sbi) 3036dcc7dae3SCyrill Gorcunov goto out_free_orig; 3037705895b6SPekka Enberg 3038705895b6SPekka Enberg sbi->s_blockgroup_lock = 3039705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3040705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3041705895b6SPekka Enberg kfree(sbi); 3042dcc7dae3SCyrill Gorcunov goto out_free_orig; 3043705895b6SPekka Enberg } 3044ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3045ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3046617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3047617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3048240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3049d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3050f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3051f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3052f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3053ac27a0ecSDave Kleikamp 30549f6200bbSTheodore Ts'o /* Cleanup superblock name */ 30559f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 30569f6200bbSTheodore Ts'o *cp = '!'; 30579f6200bbSTheodore Ts'o 3058dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3059617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3060ac27a0ecSDave Kleikamp if (!blocksize) { 3061b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3062ac27a0ecSDave Kleikamp goto out_fail; 3063ac27a0ecSDave Kleikamp } 3064ac27a0ecSDave Kleikamp 3065ac27a0ecSDave Kleikamp /* 3066617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3067ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3068ac27a0ecSDave Kleikamp */ 3069617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 307070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 307170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3072ac27a0ecSDave Kleikamp } else { 307370bbb3e0SAndrew Morton logical_sb_block = sb_block; 3074ac27a0ecSDave Kleikamp } 3075ac27a0ecSDave Kleikamp 307670bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3077b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3078ac27a0ecSDave Kleikamp goto out_fail; 3079ac27a0ecSDave Kleikamp } 3080ac27a0ecSDave Kleikamp /* 3081ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3082617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3083ac27a0ecSDave Kleikamp */ 3084617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3085ac27a0ecSDave Kleikamp sbi->s_es = es; 3086ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3087617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3088617ba13bSMingming Cao goto cantfind_ext4; 3089afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3090ac27a0ecSDave Kleikamp 3091ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3092ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3093fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3094617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3095fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 3096437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3097437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3098437ca0fdSDmitry Monakhov "2.6.38"); 3099fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3100437ca0fdSDmitry Monakhov } 3101617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3102fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3103ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 310403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3105fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 31062e7842b8SHugh Dickins #endif 310703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3108fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 31092e7842b8SHugh Dickins #endif 31106fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3111617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3112fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3113617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3114fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3115617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3116fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3117ac27a0ecSDave Kleikamp 3118617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3119fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3120bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3121fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3122bb4f397aSAneesh Kumar K.V else 3123fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 31248b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3125fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 31268b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3127fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3128ac27a0ecSDave Kleikamp 3129ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3130ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 313130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 313230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 313330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3134ac27a0ecSDave Kleikamp 31358b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3136fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3137ac27a0ecSDave Kleikamp 31381e2462f9SMingming Cao /* 3139dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3140dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3141dd919b98SAneesh Kumar K.V */ 31428b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 31438b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3144fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3145dd919b98SAneesh Kumar K.V 31468b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 31478b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 31488b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 31498b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 31508b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 31518b67f04aSTheodore Ts'o } 3152b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3153b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3154ac27a0ecSDave Kleikamp goto failed_mount; 3155ac27a0ecSDave Kleikamp 3156ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3157482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3158ac27a0ecSDave Kleikamp 3159617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3160617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3161617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3162617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3163b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3164b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3165b31e1552SEric Sandeen "running e2fsck is recommended"); 3166469108ffSTheodore Tso 3167469108ffSTheodore Tso /* 3168ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3169ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3170ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3171ac27a0ecSDave Kleikamp */ 3172a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3173ac27a0ecSDave Kleikamp goto failed_mount; 3174a13fb1a4SEric Sandeen 3175ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3176ac27a0ecSDave Kleikamp 3177617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3178617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3179b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3180b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3181ac27a0ecSDave Kleikamp goto failed_mount; 3182ac27a0ecSDave Kleikamp } 3183ac27a0ecSDave Kleikamp 3184ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3185ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3186ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3187b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3188ce40733cSAneesh Kumar K.V blocksize); 3189ac27a0ecSDave Kleikamp goto failed_mount; 3190ac27a0ecSDave Kleikamp } 3191ac27a0ecSDave Kleikamp 3192ac27a0ecSDave Kleikamp brelse(bh); 319370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 319470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 319570bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3196ac27a0ecSDave Kleikamp if (!bh) { 3197b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3198b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3199ac27a0ecSDave Kleikamp goto failed_mount; 3200ac27a0ecSDave Kleikamp } 3201617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3202ac27a0ecSDave Kleikamp sbi->s_es = es; 3203617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3204b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3205b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3206ac27a0ecSDave Kleikamp goto failed_mount; 3207ac27a0ecSDave Kleikamp } 3208ac27a0ecSDave Kleikamp } 3209ac27a0ecSDave Kleikamp 3210a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3211a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3212f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3213f287a1a5STheodore Ts'o has_huge_files); 3214f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3215ac27a0ecSDave Kleikamp 3216617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3217617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3218617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3219ac27a0ecSDave Kleikamp } else { 3220ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3221ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3222617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 32231330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3224ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3225b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3226b31e1552SEric Sandeen "unsupported inode size: %d", 3227ac27a0ecSDave Kleikamp sbi->s_inode_size); 3228ac27a0ecSDave Kleikamp goto failed_mount; 3229ac27a0ecSDave Kleikamp } 3230ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3231ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3232ac27a0ecSDave Kleikamp } 32330b8e58a1SAndreas Dilger 32340d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 32350d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 32368fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 32370d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3238d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3239b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3240b31e1552SEric Sandeen "unsupported descriptor size %lu", 32410d1ee42fSAlexandre Ratchov sbi->s_desc_size); 32420d1ee42fSAlexandre Ratchov goto failed_mount; 32430d1ee42fSAlexandre Ratchov } 32440d1ee42fSAlexandre Ratchov } else 32450d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 32460b8e58a1SAndreas Dilger 3247ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3248ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3249b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3250617ba13bSMingming Cao goto cantfind_ext4; 32510b8e58a1SAndreas Dilger 3252617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3253ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3254617ba13bSMingming Cao goto cantfind_ext4; 3255ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3256ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 32570d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3258ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3259ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3260e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3261e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 32620b8e58a1SAndreas Dilger 3263ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3264ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3265ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3266f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3267f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3268f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3269f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3270f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3271f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3272f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3273f99b2589STheodore Ts'o #else 3274f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3275f99b2589STheodore Ts'o #endif 3276f99b2589STheodore Ts'o sb->s_dirt = 1; 3277f99b2589STheodore Ts'o } 3278ac27a0ecSDave Kleikamp 3279ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3280b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3281b31e1552SEric Sandeen "#blocks per group too big: %lu", 3282ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3283ac27a0ecSDave Kleikamp goto failed_mount; 3284ac27a0ecSDave Kleikamp } 3285ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3286b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3287b31e1552SEric Sandeen "#inodes per group too big: %lu", 3288ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3289ac27a0ecSDave Kleikamp goto failed_mount; 3290ac27a0ecSDave Kleikamp } 3291ac27a0ecSDave Kleikamp 3292bf43d84bSEric Sandeen /* 3293bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3294bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3295bf43d84bSEric Sandeen */ 32965a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 329730ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 32985a9ae68aSDarrick J. Wong if (err) { 3299b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3300bf43d84bSEric Sandeen " too large to mount safely on this system"); 3301ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 330290c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 33035a9ae68aSDarrick J. Wong ret = err; 3304ac27a0ecSDave Kleikamp goto failed_mount; 3305ac27a0ecSDave Kleikamp } 3306ac27a0ecSDave Kleikamp 3307617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3308617ba13bSMingming Cao goto cantfind_ext4; 3309e7c95593SEric Sandeen 33100f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 33110f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 33120f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3313b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3314b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 33150f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 33160f2ddca6SFrom: Thiemo Nagel goto failed_mount; 33170f2ddca6SFrom: Thiemo Nagel } 33180f2ddca6SFrom: Thiemo Nagel 33194ec11028STheodore Ts'o /* 33204ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 33214ec11028STheodore Ts'o * of the filesystem. 33224ec11028STheodore Ts'o */ 33234ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3324b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 3325b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3326e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 33274ec11028STheodore Ts'o ext4_blocks_count(es)); 3328e7c95593SEric Sandeen goto failed_mount; 3329e7c95593SEric Sandeen } 3330bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3331bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3332bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3333bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 33344ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3335b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 33364ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3337b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 33384ec11028STheodore Ts'o ext4_blocks_count(es), 33394ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 33404ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 33414ec11028STheodore Ts'o goto failed_mount; 33424ec11028STheodore Ts'o } 3343bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3344fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3345fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3346617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3347617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3348ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 3349ac27a0ecSDave Kleikamp GFP_KERNEL); 3350ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3351b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3352ac27a0ecSDave Kleikamp goto failed_mount; 3353ac27a0ecSDave Kleikamp } 3354ac27a0ecSDave Kleikamp 33553244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 33569f6200bbSTheodore Ts'o if (ext4_proc_root) 33579f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 33583244fcb1SAlexander Beregalov #endif 3359240799cdSTheodore Ts'o 3360705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3361ac27a0ecSDave Kleikamp 3362ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 336370bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3364ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3365ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3366b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3367b31e1552SEric Sandeen "can't read group descriptor %d", i); 3368ac27a0ecSDave Kleikamp db_count = i; 3369ac27a0ecSDave Kleikamp goto failed_mount2; 3370ac27a0ecSDave Kleikamp } 3371ac27a0ecSDave Kleikamp } 3372bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3373b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3374ac27a0ecSDave Kleikamp goto failed_mount2; 3375ac27a0ecSDave Kleikamp } 3376772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3377772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3378b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3379b31e1552SEric Sandeen "unable to initialize " 3380b31e1552SEric Sandeen "flex_bg meta info!"); 3381772cb7c8SJose R. Santos goto failed_mount2; 3382772cb7c8SJose R. Santos } 3383772cb7c8SJose R. Santos 3384ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3385ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3386ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3387ac27a0ecSDave Kleikamp 3388ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeblocks_counter, 3389ce7e010aSTheodore Ts'o ext4_count_free_blocks(sb)); 3390ce7e010aSTheodore Ts'o if (!err) { 3391ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3392ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3393ce7e010aSTheodore Ts'o } 3394ce7e010aSTheodore Ts'o if (!err) { 3395ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3396ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3397ce7e010aSTheodore Ts'o } 3398ce7e010aSTheodore Ts'o if (!err) { 3399ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 3400ce7e010aSTheodore Ts'o } 3401ce7e010aSTheodore Ts'o if (err) { 3402ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3403ce7e010aSTheodore Ts'o goto failed_mount3; 3404ce7e010aSTheodore Ts'o } 3405ce7e010aSTheodore Ts'o 3406c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 340755138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3408c9de560dSAlex Tomas 3409ac27a0ecSDave Kleikamp /* 3410ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3411ac27a0ecSDave Kleikamp */ 34129ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 34139ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3414617ba13bSMingming Cao sb->s_op = &ext4_sops; 34159ca92389STheodore Ts'o else 34169ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3417617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3418617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3419ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3420617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3421617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3422ac27a0ecSDave Kleikamp #endif 3423ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 34243b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 342532ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 3426ac27a0ecSDave Kleikamp 3427ac27a0ecSDave Kleikamp sb->s_root = NULL; 3428ac27a0ecSDave Kleikamp 3429ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3430617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3431617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3432ac27a0ecSDave Kleikamp 3433ac27a0ecSDave Kleikamp /* 3434ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3435ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3436ac27a0ecSDave Kleikamp */ 3437ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3438617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3439617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3440ac27a0ecSDave Kleikamp goto failed_mount3; 34410390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 34420390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3443b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3444b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3445744692dcSJiaying Zhang goto failed_mount_wq; 3446ac27a0ecSDave Kleikamp } else { 3447fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 3448fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 34490390131bSFrank Mayhar sbi->s_journal = NULL; 34500390131bSFrank Mayhar needs_recovery = 0; 34510390131bSFrank Mayhar goto no_journal; 3452ac27a0ecSDave Kleikamp } 3453ac27a0ecSDave Kleikamp 3454eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3455eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3456eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3457b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3458744692dcSJiaying Zhang goto failed_mount_wq; 3459eb40a09cSJose R. Santos } 3460eb40a09cSJose R. Santos 3461d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3462d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3463d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3464d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3465d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3466818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3467818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3468818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3469818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3470d4da6c9cSLinus Torvalds } else { 3471d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3472d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3473d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3474d4da6c9cSLinus Torvalds } 3475818d276cSGirish Shilamkar 3476ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3477ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3478ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3479ac27a0ecSDave Kleikamp case 0: 3480ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 348163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 348263f57933SAndrew Morton * cope, else JOURNAL_DATA 348363f57933SAndrew Morton */ 3484dab291afSMingming Cao if (jbd2_journal_check_available_features 3485dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3486fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3487ac27a0ecSDave Kleikamp else 3488fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3489ac27a0ecSDave Kleikamp break; 3490ac27a0ecSDave Kleikamp 3491617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3492617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3493dab291afSMingming Cao if (!jbd2_journal_check_available_features 3494dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3495b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3496b31e1552SEric Sandeen "requested data journaling mode"); 3497744692dcSJiaying Zhang goto failed_mount_wq; 3498ac27a0ecSDave Kleikamp } 3499ac27a0ecSDave Kleikamp default: 3500ac27a0ecSDave Kleikamp break; 3501ac27a0ecSDave Kleikamp } 3502b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3503ac27a0ecSDave Kleikamp 3504ce7e010aSTheodore Ts'o /* 3505ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3506ce7e010aSTheodore Ts'o * need to update the global counters. 3507ce7e010aSTheodore Ts'o */ 3508ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeblocks_counter, 350984061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 3510ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 351184061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3512ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 351384061e07SDmitry Monakhov ext4_count_dirs(sb)); 3514ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); 3515206f7ab4SChristoph Hellwig 3516ce7e010aSTheodore Ts'o no_journal: 35174c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 35184c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 35194c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 35204c0425ffSMingming Cao goto failed_mount_wq; 35214c0425ffSMingming Cao } 35224c0425ffSMingming Cao 3523ac27a0ecSDave Kleikamp /* 3524dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3525ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3526ac27a0ecSDave Kleikamp */ 3527ac27a0ecSDave Kleikamp 35281d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 35291d1fe1eeSDavid Howells if (IS_ERR(root)) { 3530b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 35311d1fe1eeSDavid Howells ret = PTR_ERR(root); 353232a9bb57SManish Katiyar root = NULL; 3533ac27a0ecSDave Kleikamp goto failed_mount4; 3534ac27a0ecSDave Kleikamp } 3535ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3536b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3537ac27a0ecSDave Kleikamp goto failed_mount4; 3538ac27a0ecSDave Kleikamp } 35391d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 35401d1fe1eeSDavid Howells if (!sb->s_root) { 3541b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 35421d1fe1eeSDavid Howells ret = -ENOMEM; 35431d1fe1eeSDavid Howells goto failed_mount4; 35441d1fe1eeSDavid Howells } 3545ac27a0ecSDave Kleikamp 3546617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3547ef7f3835SKalpak Shah 3548ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3549ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3550ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3551ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3552ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3553ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3554ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3555ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3556ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3557ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3558ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3559ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3560ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3561ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3562ef7f3835SKalpak Shah } 3563ef7f3835SKalpak Shah } 3564ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3565ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3566ef7f3835SKalpak Shah sbi->s_inode_size) { 3567ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3568ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3569b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3570b31e1552SEric Sandeen "available"); 3571ef7f3835SKalpak Shah } 3572ef7f3835SKalpak Shah 357390576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 357490576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 3575b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 3576b31e1552SEric Sandeen "requested data journaling mode"); 3577fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 357890576c0bSTheodore Ts'o } 3579744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 3580744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 3581744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3582744692dcSJiaying Zhang "option - requested data journaling mode"); 3583fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3584744692dcSJiaying Zhang } 3585744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 3586744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3587744692dcSJiaying Zhang "option - block size is too small"); 3588fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3589744692dcSJiaying Zhang } 3590744692dcSJiaying Zhang } 3591c2774d84SAneesh Kumar K.V 35926fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 35936fd058f7STheodore Ts'o if (err) { 3594b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3595fbe845ddSCurt Wohlgemuth "zone (%d)", err); 35966fd058f7STheodore Ts'o goto failed_mount4; 35976fd058f7STheodore Ts'o } 35986fd058f7STheodore Ts'o 3599c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3600c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3601c2774d84SAneesh Kumar K.V if (err) { 3602421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3603c2774d84SAneesh Kumar K.V err); 3604c2774d84SAneesh Kumar K.V goto failed_mount4; 3605c2774d84SAneesh Kumar K.V } 3606c2774d84SAneesh Kumar K.V 3607bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3608bfff6873SLukas Czerner if (err) 3609bfff6873SLukas Czerner goto failed_mount4; 3610bfff6873SLukas Czerner 36113197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 36123197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 36133197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 36143197ebdbSTheodore Ts'o "%s", sb->s_id); 36153197ebdbSTheodore Ts'o if (err) { 36163197ebdbSTheodore Ts'o ext4_mb_release(sb); 36173197ebdbSTheodore Ts'o ext4_ext_release(sb); 36183197ebdbSTheodore Ts'o goto failed_mount4; 36193197ebdbSTheodore Ts'o }; 36203197ebdbSTheodore Ts'o 3621617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3622617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3623617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 36240390131bSFrank Mayhar if (needs_recovery) { 3625b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3626617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 36270390131bSFrank Mayhar } 36280390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 36290390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 36300390131bSFrank Mayhar descr = " journalled data mode"; 36310390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 36320390131bSFrank Mayhar descr = " ordered data mode"; 36330390131bSFrank Mayhar else 36340390131bSFrank Mayhar descr = " writeback data mode"; 36350390131bSFrank Mayhar } else 36360390131bSFrank Mayhar descr = "out journal"; 36370390131bSFrank Mayhar 3638d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 36398b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 36408b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3641ac27a0ecSDave Kleikamp 364266e61a9eSTheodore Ts'o init_timer(&sbi->s_err_report); 364366e61a9eSTheodore Ts'o sbi->s_err_report.function = print_daily_error_info; 364466e61a9eSTheodore Ts'o sbi->s_err_report.data = (unsigned long) sb; 364566e61a9eSTheodore Ts'o if (es->s_error_count) 364666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3647ac27a0ecSDave Kleikamp 3648d4c402d9SCurt Wohlgemuth kfree(orig_data); 3649ac27a0ecSDave Kleikamp return 0; 3650ac27a0ecSDave Kleikamp 3651617ba13bSMingming Cao cantfind_ext4: 3652ac27a0ecSDave Kleikamp if (!silent) 3653b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3654ac27a0ecSDave Kleikamp goto failed_mount; 3655ac27a0ecSDave Kleikamp 3656ac27a0ecSDave Kleikamp failed_mount4: 365732a9bb57SManish Katiyar iput(root); 365832a9bb57SManish Katiyar sb->s_root = NULL; 3659b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 36604c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 36614c0425ffSMingming Cao failed_mount_wq: 36626fd058f7STheodore Ts'o ext4_release_system_zone(sb); 36630390131bSFrank Mayhar if (sbi->s_journal) { 3664dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 366547b4a50bSJan Kara sbi->s_journal = NULL; 36660390131bSFrank Mayhar } 3667ac27a0ecSDave Kleikamp failed_mount3: 3668c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3669c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3670c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3671c5ca7c76STheodore Ts'o else 3672c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3673c5ca7c76STheodore Ts'o } 3674ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeblocks_counter); 3675ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3676ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 3677ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3678ac27a0ecSDave Kleikamp failed_mount2: 3679ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3680ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3681ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3682ac27a0ecSDave Kleikamp failed_mount: 3683240799cdSTheodore Ts'o if (sbi->s_proc) { 36849f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3685240799cdSTheodore Ts'o } 3686ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3687ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3688ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3689ac27a0ecSDave Kleikamp #endif 3690617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3691ac27a0ecSDave Kleikamp brelse(bh); 3692ac27a0ecSDave Kleikamp out_fail: 3693ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3694f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3695ac27a0ecSDave Kleikamp kfree(sbi); 3696dcc7dae3SCyrill Gorcunov out_free_orig: 3697d4c402d9SCurt Wohlgemuth kfree(orig_data); 36981d1fe1eeSDavid Howells return ret; 3699ac27a0ecSDave Kleikamp } 3700ac27a0ecSDave Kleikamp 3701ac27a0ecSDave Kleikamp /* 3702ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3703ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3704ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3705ac27a0ecSDave Kleikamp */ 3706617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3707ac27a0ecSDave Kleikamp { 3708617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3709ac27a0ecSDave Kleikamp 3710ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 371130773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 371230773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3713ac27a0ecSDave Kleikamp 3714a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3715ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3716dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3717ac27a0ecSDave Kleikamp else 3718dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 37195bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 37205bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 37215bf5683aSHidehiro Kawai else 37225bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3723a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3724ac27a0ecSDave Kleikamp } 3725ac27a0ecSDave Kleikamp 3726617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3727ac27a0ecSDave Kleikamp unsigned int journal_inum) 3728ac27a0ecSDave Kleikamp { 3729ac27a0ecSDave Kleikamp struct inode *journal_inode; 3730ac27a0ecSDave Kleikamp journal_t *journal; 3731ac27a0ecSDave Kleikamp 37320390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37330390131bSFrank Mayhar 3734ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3735ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3736ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3737ac27a0ecSDave Kleikamp 37381d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 37391d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3740b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3741ac27a0ecSDave Kleikamp return NULL; 3742ac27a0ecSDave Kleikamp } 3743ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3744ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3745ac27a0ecSDave Kleikamp iput(journal_inode); 3746b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3747ac27a0ecSDave Kleikamp return NULL; 3748ac27a0ecSDave Kleikamp } 3749ac27a0ecSDave Kleikamp 3750e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3751ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 37521d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3753b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3754ac27a0ecSDave Kleikamp iput(journal_inode); 3755ac27a0ecSDave Kleikamp return NULL; 3756ac27a0ecSDave Kleikamp } 3757ac27a0ecSDave Kleikamp 3758dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3759ac27a0ecSDave Kleikamp if (!journal) { 3760b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3761ac27a0ecSDave Kleikamp iput(journal_inode); 3762ac27a0ecSDave Kleikamp return NULL; 3763ac27a0ecSDave Kleikamp } 3764ac27a0ecSDave Kleikamp journal->j_private = sb; 3765617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3766ac27a0ecSDave Kleikamp return journal; 3767ac27a0ecSDave Kleikamp } 3768ac27a0ecSDave Kleikamp 3769617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3770ac27a0ecSDave Kleikamp dev_t j_dev) 3771ac27a0ecSDave Kleikamp { 3772ac27a0ecSDave Kleikamp struct buffer_head *bh; 3773ac27a0ecSDave Kleikamp journal_t *journal; 3774617ba13bSMingming Cao ext4_fsblk_t start; 3775617ba13bSMingming Cao ext4_fsblk_t len; 3776ac27a0ecSDave Kleikamp int hblock, blocksize; 3777617ba13bSMingming Cao ext4_fsblk_t sb_block; 3778ac27a0ecSDave Kleikamp unsigned long offset; 3779617ba13bSMingming Cao struct ext4_super_block *es; 3780ac27a0ecSDave Kleikamp struct block_device *bdev; 3781ac27a0ecSDave Kleikamp 37820390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37830390131bSFrank Mayhar 3784b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3785ac27a0ecSDave Kleikamp if (bdev == NULL) 3786ac27a0ecSDave Kleikamp return NULL; 3787ac27a0ecSDave Kleikamp 3788ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3789e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3790ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3791b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3792b31e1552SEric Sandeen "blocksize too small for journal device"); 3793ac27a0ecSDave Kleikamp goto out_bdev; 3794ac27a0ecSDave Kleikamp } 3795ac27a0ecSDave Kleikamp 3796617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3797617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3798ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3799ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3800b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3801b31e1552SEric Sandeen "external journal"); 3802ac27a0ecSDave Kleikamp goto out_bdev; 3803ac27a0ecSDave Kleikamp } 3804ac27a0ecSDave Kleikamp 3805617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3806617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3807ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3808617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3809b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3810b31e1552SEric Sandeen "bad superblock"); 3811ac27a0ecSDave Kleikamp brelse(bh); 3812ac27a0ecSDave Kleikamp goto out_bdev; 3813ac27a0ecSDave Kleikamp } 3814ac27a0ecSDave Kleikamp 3815617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3816b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3817ac27a0ecSDave Kleikamp brelse(bh); 3818ac27a0ecSDave Kleikamp goto out_bdev; 3819ac27a0ecSDave Kleikamp } 3820ac27a0ecSDave Kleikamp 3821bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3822ac27a0ecSDave Kleikamp start = sb_block + 1; 3823ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3824ac27a0ecSDave Kleikamp 3825dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3826ac27a0ecSDave Kleikamp start, len, blocksize); 3827ac27a0ecSDave Kleikamp if (!journal) { 3828b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3829ac27a0ecSDave Kleikamp goto out_bdev; 3830ac27a0ecSDave Kleikamp } 3831ac27a0ecSDave Kleikamp journal->j_private = sb; 3832ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3833ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3834ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3835b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3836ac27a0ecSDave Kleikamp goto out_journal; 3837ac27a0ecSDave Kleikamp } 3838ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3839b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3840b31e1552SEric Sandeen "user (unsupported) - %d", 3841ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3842ac27a0ecSDave Kleikamp goto out_journal; 3843ac27a0ecSDave Kleikamp } 3844617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3845617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3846ac27a0ecSDave Kleikamp return journal; 38470b8e58a1SAndreas Dilger 3848ac27a0ecSDave Kleikamp out_journal: 3849dab291afSMingming Cao jbd2_journal_destroy(journal); 3850ac27a0ecSDave Kleikamp out_bdev: 3851617ba13bSMingming Cao ext4_blkdev_put(bdev); 3852ac27a0ecSDave Kleikamp return NULL; 3853ac27a0ecSDave Kleikamp } 3854ac27a0ecSDave Kleikamp 3855617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3856617ba13bSMingming Cao struct ext4_super_block *es, 3857ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3858ac27a0ecSDave Kleikamp { 3859ac27a0ecSDave Kleikamp journal_t *journal; 3860ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3861ac27a0ecSDave Kleikamp dev_t journal_dev; 3862ac27a0ecSDave Kleikamp int err = 0; 3863ac27a0ecSDave Kleikamp int really_read_only; 3864ac27a0ecSDave Kleikamp 38650390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38660390131bSFrank Mayhar 3867ac27a0ecSDave Kleikamp if (journal_devnum && 3868ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3869b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3870b31e1552SEric Sandeen "numbers have changed"); 3871ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3872ac27a0ecSDave Kleikamp } else 3873ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3874ac27a0ecSDave Kleikamp 3875ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3876ac27a0ecSDave Kleikamp 3877ac27a0ecSDave Kleikamp /* 3878ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3879ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3880ac27a0ecSDave Kleikamp * can get read-write access to the device. 3881ac27a0ecSDave Kleikamp */ 3882617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3883ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3884b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3885b31e1552SEric Sandeen "required on readonly filesystem"); 3886ac27a0ecSDave Kleikamp if (really_read_only) { 3887b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3888b31e1552SEric Sandeen "unavailable, cannot proceed"); 3889ac27a0ecSDave Kleikamp return -EROFS; 3890ac27a0ecSDave Kleikamp } 3891b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3892b31e1552SEric Sandeen "be enabled during recovery"); 3893ac27a0ecSDave Kleikamp } 3894ac27a0ecSDave Kleikamp } 3895ac27a0ecSDave Kleikamp 3896ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3897b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3898b31e1552SEric Sandeen "and inode journals!"); 3899ac27a0ecSDave Kleikamp return -EINVAL; 3900ac27a0ecSDave Kleikamp } 3901ac27a0ecSDave Kleikamp 3902ac27a0ecSDave Kleikamp if (journal_inum) { 3903617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3904ac27a0ecSDave Kleikamp return -EINVAL; 3905ac27a0ecSDave Kleikamp } else { 3906617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3907ac27a0ecSDave Kleikamp return -EINVAL; 3908ac27a0ecSDave Kleikamp } 3909ac27a0ecSDave Kleikamp 391090576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3911b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 39124776004fSTheodore Ts'o 3913ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3914dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3915ac27a0ecSDave Kleikamp if (err) { 3916b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3917dab291afSMingming Cao jbd2_journal_destroy(journal); 3918ac27a0ecSDave Kleikamp return err; 3919ac27a0ecSDave Kleikamp } 3920ac27a0ecSDave Kleikamp } 3921ac27a0ecSDave Kleikamp 3922617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3923dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 39241c13d5c0STheodore Ts'o if (!err) { 39251c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 39261c13d5c0STheodore Ts'o if (save) 39271c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 39281c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 3929dab291afSMingming Cao err = jbd2_journal_load(journal); 39301c13d5c0STheodore Ts'o if (save) 39311c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 39321c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 39331c13d5c0STheodore Ts'o kfree(save); 39341c13d5c0STheodore Ts'o } 3935ac27a0ecSDave Kleikamp 3936ac27a0ecSDave Kleikamp if (err) { 3937b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3938dab291afSMingming Cao jbd2_journal_destroy(journal); 3939ac27a0ecSDave Kleikamp return err; 3940ac27a0ecSDave Kleikamp } 3941ac27a0ecSDave Kleikamp 3942617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3943617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3944ac27a0ecSDave Kleikamp 3945c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 3946ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3947ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3948ac27a0ecSDave Kleikamp 3949ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3950e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3951ac27a0ecSDave Kleikamp } 3952ac27a0ecSDave Kleikamp 3953ac27a0ecSDave Kleikamp return 0; 3954ac27a0ecSDave Kleikamp } 3955ac27a0ecSDave Kleikamp 3956e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3957ac27a0ecSDave Kleikamp { 3958e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3959617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3960c4be0c1dSTakashi Sato int error = 0; 3961ac27a0ecSDave Kleikamp 3962ac27a0ecSDave Kleikamp if (!sbh) 3963c4be0c1dSTakashi Sato return error; 3964914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3965914258bfSTheodore Ts'o /* 3966914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3967914258bfSTheodore Ts'o * superblock failed. This could happen because the 3968914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3969914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3970914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3971914258bfSTheodore Ts'o * write and hope for the best. 3972914258bfSTheodore Ts'o */ 3973b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3974b31e1552SEric Sandeen "superblock detected"); 3975914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3976914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3977914258bfSTheodore Ts'o } 397871290b36STheodore Ts'o /* 397971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 398071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 398171290b36STheodore Ts'o * write time when we are mounting the root file system 398271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 398371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 398471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 398571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 398671290b36STheodore Ts'o * to complain and force a full file system check. 398771290b36STheodore Ts'o */ 398871290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3989ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3990f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3991afc32f7eSTheodore Ts'o es->s_kbytes_written = 3992afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3993afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3994afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 3995f613dfcbSTheodore Ts'o else 3996f613dfcbSTheodore Ts'o es->s_kbytes_written = 3997f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 39985d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 39995d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 40007f93cff9STheodore Ts'o es->s_free_inodes_count = 40017f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 40025d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 40037234ab2aSTheodore Ts'o sb->s_dirt = 0; 4004ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4005ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4006914258bfSTheodore Ts'o if (sync) { 4007c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4008c4be0c1dSTakashi Sato if (error) 4009c4be0c1dSTakashi Sato return error; 4010c4be0c1dSTakashi Sato 4011c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4012c4be0c1dSTakashi Sato if (error) { 4013b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4014b31e1552SEric Sandeen "superblock"); 4015914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4016914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4017914258bfSTheodore Ts'o } 4018914258bfSTheodore Ts'o } 4019c4be0c1dSTakashi Sato return error; 4020ac27a0ecSDave Kleikamp } 4021ac27a0ecSDave Kleikamp 4022ac27a0ecSDave Kleikamp /* 4023ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4024ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4025ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4026ac27a0ecSDave Kleikamp */ 4027617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4028617ba13bSMingming Cao struct ext4_super_block *es) 4029ac27a0ecSDave Kleikamp { 4030617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4031ac27a0ecSDave Kleikamp 40320390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 40330390131bSFrank Mayhar BUG_ON(journal != NULL); 40340390131bSFrank Mayhar return; 40350390131bSFrank Mayhar } 4036dab291afSMingming Cao jbd2_journal_lock_updates(journal); 40377ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 40387ffe1ea8SHidehiro Kawai goto out; 40397ffe1ea8SHidehiro Kawai 4040617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4041ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4042617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4043e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4044ac27a0ecSDave Kleikamp } 40457ffe1ea8SHidehiro Kawai 40467ffe1ea8SHidehiro Kawai out: 4047dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4048ac27a0ecSDave Kleikamp } 4049ac27a0ecSDave Kleikamp 4050ac27a0ecSDave Kleikamp /* 4051ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4052ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4053ac27a0ecSDave Kleikamp * main filesystem now. 4054ac27a0ecSDave Kleikamp */ 4055617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4056617ba13bSMingming Cao struct ext4_super_block *es) 4057ac27a0ecSDave Kleikamp { 4058ac27a0ecSDave Kleikamp journal_t *journal; 4059ac27a0ecSDave Kleikamp int j_errno; 4060ac27a0ecSDave Kleikamp const char *errstr; 4061ac27a0ecSDave Kleikamp 40620390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40630390131bSFrank Mayhar 4064617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4065ac27a0ecSDave Kleikamp 4066ac27a0ecSDave Kleikamp /* 4067ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4068617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4069ac27a0ecSDave Kleikamp */ 4070ac27a0ecSDave Kleikamp 4071dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4072ac27a0ecSDave Kleikamp if (j_errno) { 4073ac27a0ecSDave Kleikamp char nbuf[16]; 4074ac27a0ecSDave Kleikamp 4075617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 407612062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4077ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 407812062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4079ac27a0ecSDave Kleikamp 4080617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4081617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4082e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4083ac27a0ecSDave Kleikamp 4084dab291afSMingming Cao jbd2_journal_clear_err(journal); 4085ac27a0ecSDave Kleikamp } 4086ac27a0ecSDave Kleikamp } 4087ac27a0ecSDave Kleikamp 4088ac27a0ecSDave Kleikamp /* 4089ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4090ac27a0ecSDave Kleikamp * and wait on the commit. 4091ac27a0ecSDave Kleikamp */ 4092617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4093ac27a0ecSDave Kleikamp { 4094ac27a0ecSDave Kleikamp journal_t *journal; 40950390131bSFrank Mayhar int ret = 0; 4096ac27a0ecSDave Kleikamp 4097ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4098ac27a0ecSDave Kleikamp return 0; 4099ac27a0ecSDave Kleikamp 4100617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 41016b0310fbSEric Sandeen if (journal) { 4102437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4103617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 41046b0310fbSEric Sandeen } 41050390131bSFrank Mayhar 4106ac27a0ecSDave Kleikamp return ret; 4107ac27a0ecSDave Kleikamp } 4108ac27a0ecSDave Kleikamp 4109617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4110ac27a0ecSDave Kleikamp { 4111ebc1ac16SChristoph Hellwig lock_super(sb); 4112e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4113ebc1ac16SChristoph Hellwig unlock_super(sb); 41140390131bSFrank Mayhar } 4115ac27a0ecSDave Kleikamp 4116617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4117ac27a0ecSDave Kleikamp { 411814ce0cb4STheodore Ts'o int ret = 0; 41199eddacf9SJan Kara tid_t target; 41208d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4121ac27a0ecSDave Kleikamp 41229bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 41238d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 41248d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4125ac27a0ecSDave Kleikamp if (wait) 41268d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 41270390131bSFrank Mayhar } 412814ce0cb4STheodore Ts'o return ret; 4129ac27a0ecSDave Kleikamp } 4130ac27a0ecSDave Kleikamp 4131ac27a0ecSDave Kleikamp /* 4132ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4133ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4134ac27a0ecSDave Kleikamp */ 4135c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4136ac27a0ecSDave Kleikamp { 4137c4be0c1dSTakashi Sato int error = 0; 4138c4be0c1dSTakashi Sato journal_t *journal; 4139ac27a0ecSDave Kleikamp 41409ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41419ca92389STheodore Ts'o return 0; 41429ca92389STheodore Ts'o 4143c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4144ac27a0ecSDave Kleikamp 4145ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4146dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41477ffe1ea8SHidehiro Kawai 41487ffe1ea8SHidehiro Kawai /* 41499ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 41509ca92389STheodore Ts'o * the journal. 41517ffe1ea8SHidehiro Kawai */ 4152c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 41536b0310fbSEric Sandeen if (error < 0) 41546b0310fbSEric Sandeen goto out; 4155ac27a0ecSDave Kleikamp 4156ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4157617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4158e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 41596b0310fbSEric Sandeen out: 41606b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 41616b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 41626b0310fbSEric Sandeen return error; 4163ac27a0ecSDave Kleikamp } 4164ac27a0ecSDave Kleikamp 4165ac27a0ecSDave Kleikamp /* 4166ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4167ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4168ac27a0ecSDave Kleikamp */ 4169c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4170ac27a0ecSDave Kleikamp { 41719ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41729ca92389STheodore Ts'o return 0; 41739ca92389STheodore Ts'o 4174ac27a0ecSDave Kleikamp lock_super(sb); 41759ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4176617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4177e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4178ac27a0ecSDave Kleikamp unlock_super(sb); 4179c4be0c1dSTakashi Sato return 0; 4180ac27a0ecSDave Kleikamp } 4181ac27a0ecSDave Kleikamp 4182673c6100STheodore Ts'o /* 4183673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4184673c6100STheodore Ts'o */ 4185673c6100STheodore Ts'o struct ext4_mount_options { 4186673c6100STheodore Ts'o unsigned long s_mount_opt; 4187a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4188673c6100STheodore Ts'o uid_t s_resuid; 4189673c6100STheodore Ts'o gid_t s_resgid; 4190673c6100STheodore Ts'o unsigned long s_commit_interval; 4191673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4192673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4193673c6100STheodore Ts'o int s_jquota_fmt; 4194673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4195673c6100STheodore Ts'o #endif 4196673c6100STheodore Ts'o }; 4197673c6100STheodore Ts'o 4198617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4199ac27a0ecSDave Kleikamp { 4200617ba13bSMingming Cao struct ext4_super_block *es; 4201617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4202617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4203ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4204617ba13bSMingming Cao struct ext4_mount_options old_opts; 4205c79d967dSChristoph Hellwig int enable_quota = 0; 42068a266467STheodore Ts'o ext4_group_t g; 4207b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4208ac27a0ecSDave Kleikamp int err; 4209ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4210ac27a0ecSDave Kleikamp int i; 4211ac27a0ecSDave Kleikamp #endif 4212d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4213ac27a0ecSDave Kleikamp 4214ac27a0ecSDave Kleikamp /* Store the original options */ 4215bbd6851aSAl Viro lock_super(sb); 4216ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4217ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4218a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4219ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4220ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4221ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 422230773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 422330773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4224ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4225ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4226ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4227ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4228ac27a0ecSDave Kleikamp #endif 4229b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4230b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4231ac27a0ecSDave Kleikamp 4232ac27a0ecSDave Kleikamp /* 4233ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4234ac27a0ecSDave Kleikamp */ 4235b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4236b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4237ac27a0ecSDave Kleikamp err = -EINVAL; 4238ac27a0ecSDave Kleikamp goto restore_opts; 4239ac27a0ecSDave Kleikamp } 4240ac27a0ecSDave Kleikamp 42414ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4242c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4243ac27a0ecSDave Kleikamp 4244ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4245482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4246ac27a0ecSDave Kleikamp 4247ac27a0ecSDave Kleikamp es = sbi->s_es; 4248ac27a0ecSDave Kleikamp 4249b3881f74STheodore Ts'o if (sbi->s_journal) { 4250617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4251b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4252b3881f74STheodore Ts'o } 4253ac27a0ecSDave Kleikamp 4254ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4255bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 42564ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4257ac27a0ecSDave Kleikamp err = -EROFS; 4258ac27a0ecSDave Kleikamp goto restore_opts; 4259ac27a0ecSDave Kleikamp } 4260ac27a0ecSDave Kleikamp 4261ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 42620f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 42630f0dd62fSChristoph Hellwig if (err < 0) 4264c79d967dSChristoph Hellwig goto restore_opts; 4265c79d967dSChristoph Hellwig 4266ac27a0ecSDave Kleikamp /* 4267ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4268ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4269ac27a0ecSDave Kleikamp */ 4270ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4271ac27a0ecSDave Kleikamp 4272ac27a0ecSDave Kleikamp /* 4273ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4274ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4275ac27a0ecSDave Kleikamp * mark the partition as valid again. 4276ac27a0ecSDave Kleikamp */ 4277617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4278617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4279ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4280ac27a0ecSDave Kleikamp 4281a63c9eb2STheodore Ts'o if (sbi->s_journal) 4282617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4283ac27a0ecSDave Kleikamp } else { 4284a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4285a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4286ac27a0ecSDave Kleikamp err = -EROFS; 4287ac27a0ecSDave Kleikamp goto restore_opts; 4288ac27a0ecSDave Kleikamp } 4289ead6596bSEric Sandeen /* 42908a266467STheodore Ts'o * Make sure the group descriptor checksums 42910b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 42928a266467STheodore Ts'o */ 42938a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 42948a266467STheodore Ts'o struct ext4_group_desc *gdp = 42958a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 42968a266467STheodore Ts'o 42978a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4298b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4299b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 43008a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 43018a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 43028a266467STheodore Ts'o err = -EINVAL; 43038a266467STheodore Ts'o goto restore_opts; 43048a266467STheodore Ts'o } 43058a266467STheodore Ts'o } 43068a266467STheodore Ts'o 43078a266467STheodore Ts'o /* 4308ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4309ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4310ead6596bSEric Sandeen * require a full umount/remount for now. 4311ead6596bSEric Sandeen */ 4312ead6596bSEric Sandeen if (es->s_last_orphan) { 4313b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4314ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4315ead6596bSEric Sandeen "orphan inode list. Please " 4316b31e1552SEric Sandeen "umount/remount instead"); 4317ead6596bSEric Sandeen err = -EINVAL; 4318ead6596bSEric Sandeen goto restore_opts; 4319ead6596bSEric Sandeen } 4320ead6596bSEric Sandeen 4321ac27a0ecSDave Kleikamp /* 4322ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4323ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4324ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4325ac27a0ecSDave Kleikamp * the partition.) 4326ac27a0ecSDave Kleikamp */ 43270390131bSFrank Mayhar if (sbi->s_journal) 4328617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4329ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4330617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4331ac27a0ecSDave Kleikamp goto restore_opts; 4332617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4333ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4334c79d967dSChristoph Hellwig enable_quota = 1; 4335ac27a0ecSDave Kleikamp } 4336ac27a0ecSDave Kleikamp } 4337bfff6873SLukas Czerner 4338bfff6873SLukas Czerner /* 4339bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4340bfff6873SLukas Czerner * current settings 4341bfff6873SLukas Czerner */ 4342bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4343bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4344bfff6873SLukas Czerner else { 4345bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4346bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4347bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4348bfff6873SLukas Czerner } 4349bfff6873SLukas Czerner 43506fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 43510390131bSFrank Mayhar if (sbi->s_journal == NULL) 4352e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 43530390131bSFrank Mayhar 4354ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4355ac27a0ecSDave Kleikamp /* Release old quota file names */ 4356ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4357ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4358ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4359ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4360ac27a0ecSDave Kleikamp #endif 4361bbd6851aSAl Viro unlock_super(sb); 4362c79d967dSChristoph Hellwig if (enable_quota) 43630f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4364d4c402d9SCurt Wohlgemuth 4365d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4366d4c402d9SCurt Wohlgemuth kfree(orig_data); 4367ac27a0ecSDave Kleikamp return 0; 43680b8e58a1SAndreas Dilger 4369ac27a0ecSDave Kleikamp restore_opts: 4370ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4371ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4372a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4373ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4374ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4375ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 437630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 437730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4378ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4379ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4380ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4381ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4382ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4383ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4384ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4385ac27a0ecSDave Kleikamp } 4386ac27a0ecSDave Kleikamp #endif 4387bbd6851aSAl Viro unlock_super(sb); 4388d4c402d9SCurt Wohlgemuth kfree(orig_data); 4389ac27a0ecSDave Kleikamp return err; 4390ac27a0ecSDave Kleikamp } 4391ac27a0ecSDave Kleikamp 4392617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4393ac27a0ecSDave Kleikamp { 4394ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4395617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4396617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4397960cc398SPekka Enberg u64 fsid; 4398ac27a0ecSDave Kleikamp 43995e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 44005e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 44016bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 44028df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 44035e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4404ac27a0ecSDave Kleikamp 4405ac27a0ecSDave Kleikamp /* 44065e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 44075e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 44085e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4409ac27a0ecSDave Kleikamp */ 4410ac27a0ecSDave Kleikamp 4411ac27a0ecSDave Kleikamp /* 4412ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4413ac27a0ecSDave Kleikamp * overhead 4414ac27a0ecSDave Kleikamp */ 4415ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 4416ac27a0ecSDave Kleikamp 4417ac27a0ecSDave Kleikamp /* 4418ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 4419ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 4420ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 4421ac27a0ecSDave Kleikamp */ 4422ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4423617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 4424617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 4425ac27a0ecSDave Kleikamp cond_resched(); 4426ac27a0ecSDave Kleikamp } 4427ac27a0ecSDave Kleikamp 4428ac27a0ecSDave Kleikamp /* 4429ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 4430ac27a0ecSDave Kleikamp * bitmap, and an inode table. 4431ac27a0ecSDave Kleikamp */ 44325e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 44335e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 44345e70030dSBadari Pulavarty smp_wmb(); 44356bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4436ac27a0ecSDave Kleikamp } 4437ac27a0ecSDave Kleikamp 4438617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4439ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 44405e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 44416bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 44426bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 4443bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4444bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4445ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4446ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 444752d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4448617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4449960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4450960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4451960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4452960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 44530b8e58a1SAndreas Dilger 4454ac27a0ecSDave Kleikamp return 0; 4455ac27a0ecSDave Kleikamp } 4456ac27a0ecSDave Kleikamp 44570b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 44580b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4459ac27a0ecSDave Kleikamp * Process 1 Process 2 4460617ba13bSMingming Cao * ext4_create() quota_sync() 4461dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4462871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4463dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4464ac27a0ecSDave Kleikamp * 4465ac27a0ecSDave Kleikamp */ 4466ac27a0ecSDave Kleikamp 4467ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4468ac27a0ecSDave Kleikamp 4469ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4470ac27a0ecSDave Kleikamp { 4471ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4472ac27a0ecSDave Kleikamp } 4473ac27a0ecSDave Kleikamp 4474617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4475ac27a0ecSDave Kleikamp { 4476ac27a0ecSDave Kleikamp int ret, err; 4477ac27a0ecSDave Kleikamp handle_t *handle; 4478ac27a0ecSDave Kleikamp struct inode *inode; 4479ac27a0ecSDave Kleikamp 4480ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4481617ba13bSMingming Cao handle = ext4_journal_start(inode, 4482617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4483ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4484ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4485ac27a0ecSDave Kleikamp ret = dquot_commit(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_acquire_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_INIT_BLOCKS(dquot->dq_sb)); 4499ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4500ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4501ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4502617ba13bSMingming Cao err = ext4_journal_stop(handle); 4503ac27a0ecSDave Kleikamp if (!ret) 4504ac27a0ecSDave Kleikamp ret = err; 4505ac27a0ecSDave Kleikamp return ret; 4506ac27a0ecSDave Kleikamp } 4507ac27a0ecSDave Kleikamp 4508617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4509ac27a0ecSDave Kleikamp { 4510ac27a0ecSDave Kleikamp int ret, err; 4511ac27a0ecSDave Kleikamp handle_t *handle; 4512ac27a0ecSDave Kleikamp 4513617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4514617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 45159c3013e9SJan Kara if (IS_ERR(handle)) { 45169c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 45179c3013e9SJan Kara dquot_release(dquot); 4518ac27a0ecSDave Kleikamp return PTR_ERR(handle); 45199c3013e9SJan Kara } 4520ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4521617ba13bSMingming Cao err = ext4_journal_stop(handle); 4522ac27a0ecSDave Kleikamp if (!ret) 4523ac27a0ecSDave Kleikamp ret = err; 4524ac27a0ecSDave Kleikamp return ret; 4525ac27a0ecSDave Kleikamp } 4526ac27a0ecSDave Kleikamp 4527617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4528ac27a0ecSDave Kleikamp { 45292c8be6b2SJan Kara /* Are we journaling quotas? */ 4530617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4531617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4532ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4533617ba13bSMingming Cao return ext4_write_dquot(dquot); 4534ac27a0ecSDave Kleikamp } else { 4535ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4536ac27a0ecSDave Kleikamp } 4537ac27a0ecSDave Kleikamp } 4538ac27a0ecSDave Kleikamp 4539617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4540ac27a0ecSDave Kleikamp { 4541ac27a0ecSDave Kleikamp int ret, err; 4542ac27a0ecSDave Kleikamp handle_t *handle; 4543ac27a0ecSDave Kleikamp 4544ac27a0ecSDave Kleikamp /* Data block + inode block */ 4545617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4546ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4547ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4548ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4549617ba13bSMingming Cao err = ext4_journal_stop(handle); 4550ac27a0ecSDave Kleikamp if (!ret) 4551ac27a0ecSDave Kleikamp ret = err; 4552ac27a0ecSDave Kleikamp return ret; 4553ac27a0ecSDave Kleikamp } 4554ac27a0ecSDave Kleikamp 4555ac27a0ecSDave Kleikamp /* 4556ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4557ac27a0ecSDave Kleikamp * the quota file and such... 4558ac27a0ecSDave Kleikamp */ 4559617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4560ac27a0ecSDave Kleikamp { 4561287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4562617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4563ac27a0ecSDave Kleikamp } 4564ac27a0ecSDave Kleikamp 4565ac27a0ecSDave Kleikamp /* 4566ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4567ac27a0ecSDave Kleikamp */ 4568617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4569f00c9e44SJan Kara struct path *path) 4570ac27a0ecSDave Kleikamp { 4571ac27a0ecSDave Kleikamp int err; 4572ac27a0ecSDave Kleikamp 4573ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4574ac27a0ecSDave Kleikamp return -EINVAL; 45750623543bSJan Kara 4576ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4577f00c9e44SJan Kara if (path->mnt->mnt_sb != sb) 4578ac27a0ecSDave Kleikamp return -EXDEV; 45790623543bSJan Kara /* Journaling quota? */ 45800623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 45812b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4582f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4583b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4584b31e1552SEric Sandeen "Quota file not on filesystem root. " 4585b31e1552SEric Sandeen "Journaled quota will not work"); 45860623543bSJan Kara } 45870623543bSJan Kara 45880623543bSJan Kara /* 45890623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 45900623543bSJan Kara * all updates to the file when we bypass pagecache... 45910623543bSJan Kara */ 45920390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4593f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 45940623543bSJan Kara /* 45950623543bSJan Kara * We don't need to lock updates but journal_flush() could 45960623543bSJan Kara * otherwise be livelocked... 45970623543bSJan Kara */ 45980623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 45997ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 46000623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4601f00c9e44SJan Kara if (err) 46027ffe1ea8SHidehiro Kawai return err; 46037ffe1ea8SHidehiro Kawai } 46040623543bSJan Kara 4605f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4606ac27a0ecSDave Kleikamp } 4607ac27a0ecSDave Kleikamp 4608ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4609ca0e05e4SDmitry Monakhov { 461087009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 461187009d86SDmitry Monakhov * Caller already holds s_umount sem */ 461287009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4613ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4614ca0e05e4SDmitry Monakhov 4615ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4616ca0e05e4SDmitry Monakhov } 4617ca0e05e4SDmitry Monakhov 4618ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4619ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4620ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 4621ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4622617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4623ac27a0ecSDave Kleikamp size_t len, loff_t off) 4624ac27a0ecSDave Kleikamp { 4625ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4626725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4627ac27a0ecSDave Kleikamp int err = 0; 4628ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4629ac27a0ecSDave Kleikamp int tocopy; 4630ac27a0ecSDave Kleikamp size_t toread; 4631ac27a0ecSDave Kleikamp struct buffer_head *bh; 4632ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4633ac27a0ecSDave Kleikamp 4634ac27a0ecSDave Kleikamp if (off > i_size) 4635ac27a0ecSDave Kleikamp return 0; 4636ac27a0ecSDave Kleikamp if (off+len > i_size) 4637ac27a0ecSDave Kleikamp len = i_size-off; 4638ac27a0ecSDave Kleikamp toread = len; 4639ac27a0ecSDave Kleikamp while (toread > 0) { 4640ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4641ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4642617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4643ac27a0ecSDave Kleikamp if (err) 4644ac27a0ecSDave Kleikamp return err; 4645ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4646ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4647ac27a0ecSDave Kleikamp else 4648ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4649ac27a0ecSDave Kleikamp brelse(bh); 4650ac27a0ecSDave Kleikamp offset = 0; 4651ac27a0ecSDave Kleikamp toread -= tocopy; 4652ac27a0ecSDave Kleikamp data += tocopy; 4653ac27a0ecSDave Kleikamp blk++; 4654ac27a0ecSDave Kleikamp } 4655ac27a0ecSDave Kleikamp return len; 4656ac27a0ecSDave Kleikamp } 4657ac27a0ecSDave Kleikamp 4658ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4659ac27a0ecSDave Kleikamp * enough credits) */ 4660617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4661ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4662ac27a0ecSDave Kleikamp { 4663ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4664725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4665ac27a0ecSDave Kleikamp int err = 0; 4666ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4667ac27a0ecSDave Kleikamp struct buffer_head *bh; 4668ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4669ac27a0ecSDave Kleikamp 46700390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4671b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4672b31e1552SEric Sandeen " cancelled because transaction is not started", 46739c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 46749c3013e9SJan Kara return -EIO; 46759c3013e9SJan Kara } 467667eeb568SDmitry Monakhov /* 467767eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 467867eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 467967eeb568SDmitry Monakhov */ 468067eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 468167eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 468267eeb568SDmitry Monakhov " cancelled because not block aligned", 468367eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 468467eeb568SDmitry Monakhov return -EIO; 468567eeb568SDmitry Monakhov } 468667eeb568SDmitry Monakhov 4687ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4688617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4689ac27a0ecSDave Kleikamp if (!bh) 4690ac27a0ecSDave Kleikamp goto out; 4691617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4692ac27a0ecSDave Kleikamp if (err) { 4693ac27a0ecSDave Kleikamp brelse(bh); 4694ac27a0ecSDave Kleikamp goto out; 4695ac27a0ecSDave Kleikamp } 4696ac27a0ecSDave Kleikamp lock_buffer(bh); 469767eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4698ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4699ac27a0ecSDave Kleikamp unlock_buffer(bh); 47000390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4701ac27a0ecSDave Kleikamp brelse(bh); 4702ac27a0ecSDave Kleikamp out: 470367eeb568SDmitry Monakhov if (err) { 47044d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4705ac27a0ecSDave Kleikamp return err; 47064d04e4fbSJan Kara } 470767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 470867eeb568SDmitry Monakhov i_size_write(inode, off + len); 4709617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4710ac27a0ecSDave Kleikamp } 4711ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4712617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4713ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 471467eeb568SDmitry Monakhov return len; 4715ac27a0ecSDave Kleikamp } 4716ac27a0ecSDave Kleikamp 4717ac27a0ecSDave Kleikamp #endif 4718ac27a0ecSDave Kleikamp 4719152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4720152a0836SAl Viro const char *dev_name, void *data) 4721ac27a0ecSDave Kleikamp { 4722152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4723ac27a0ecSDave Kleikamp } 4724ac27a0ecSDave Kleikamp 472537f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 472624b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 472724b58424STheodore Ts'o .owner = THIS_MODULE, 472824b58424STheodore Ts'o .name = "ext2", 4729152a0836SAl Viro .mount = ext4_mount, 473024b58424STheodore Ts'o .kill_sb = kill_block_super, 473124b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 473224b58424STheodore Ts'o }; 473324b58424STheodore Ts'o 473424b58424STheodore Ts'o static inline void register_as_ext2(void) 473524b58424STheodore Ts'o { 473624b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 473724b58424STheodore Ts'o if (err) 473824b58424STheodore Ts'o printk(KERN_WARNING 473924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 474024b58424STheodore Ts'o } 474124b58424STheodore Ts'o 474224b58424STheodore Ts'o static inline void unregister_as_ext2(void) 474324b58424STheodore Ts'o { 474424b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 474524b58424STheodore Ts'o } 474651b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 474724b58424STheodore Ts'o #else 474824b58424STheodore Ts'o static inline void register_as_ext2(void) { } 474924b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 475024b58424STheodore Ts'o #endif 475124b58424STheodore Ts'o 475237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 475324b58424STheodore Ts'o static inline void register_as_ext3(void) 475424b58424STheodore Ts'o { 475524b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 475624b58424STheodore Ts'o if (err) 475724b58424STheodore Ts'o printk(KERN_WARNING 475824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 475924b58424STheodore Ts'o } 476024b58424STheodore Ts'o 476124b58424STheodore Ts'o static inline void unregister_as_ext3(void) 476224b58424STheodore Ts'o { 476324b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 476424b58424STheodore Ts'o } 476551b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 476624b58424STheodore Ts'o #else 476724b58424STheodore Ts'o static inline void register_as_ext3(void) { } 476824b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 476924b58424STheodore Ts'o #endif 477024b58424STheodore Ts'o 477103010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4772ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 477303010a33STheodore Ts'o .name = "ext4", 4774152a0836SAl Viro .mount = ext4_mount, 4775ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4776ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4777ac27a0ecSDave Kleikamp }; 4778ac27a0ecSDave Kleikamp 47798f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 4780857ac889SLukas Czerner { 4781857ac889SLukas Czerner struct ext4_features *ef; 4782857ac889SLukas Czerner int ret = -ENOMEM; 4783857ac889SLukas Czerner 4784857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4785857ac889SLukas Czerner if (!ef) 4786857ac889SLukas Czerner goto out; 4787857ac889SLukas Czerner 4788857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4789857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4790857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4791857ac889SLukas Czerner "features"); 4792857ac889SLukas Czerner if (ret) { 4793857ac889SLukas Czerner kfree(ef); 4794857ac889SLukas Czerner goto out; 4795857ac889SLukas Czerner } 4796857ac889SLukas Czerner 4797857ac889SLukas Czerner ext4_feat = ef; 4798857ac889SLukas Czerner ret = 0; 4799857ac889SLukas Czerner out: 4800857ac889SLukas Czerner return ret; 4801857ac889SLukas Czerner } 4802857ac889SLukas Czerner 48038f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 48048f021222SLukas Czerner { 48058f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 48068f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 48078f021222SLukas Czerner kfree(ext4_feat); 48088f021222SLukas Czerner } 48098f021222SLukas Czerner 4810e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 4811e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 4812e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 4813e9e3bcecSEric Sandeen 48145dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 4815ac27a0ecSDave Kleikamp { 4816e9e3bcecSEric Sandeen int i, err; 4817c9de560dSAlex Tomas 481812e9b892SDmitry Monakhov ext4_check_flag_values(); 4819e9e3bcecSEric Sandeen 4820e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 4821e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 4822e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 4823e9e3bcecSEric Sandeen } 4824e9e3bcecSEric Sandeen 48255dabfc78STheodore Ts'o err = ext4_init_pageio(); 48266fd058f7STheodore Ts'o if (err) 48276fd058f7STheodore Ts'o return err; 48285dabfc78STheodore Ts'o err = ext4_init_system_zone(); 4829bd2d0210STheodore Ts'o if (err) 4830dd68314cSTheodore Ts'o goto out7; 48313197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 48323197ebdbSTheodore Ts'o if (!ext4_kset) 4833dd68314cSTheodore Ts'o goto out6; 48349f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4835dd68314cSTheodore Ts'o if (!ext4_proc_root) 4836dd68314cSTheodore Ts'o goto out5; 4837857ac889SLukas Czerner 4838857ac889SLukas Czerner err = ext4_init_feat_adverts(); 4839dd68314cSTheodore Ts'o if (err) 4840dd68314cSTheodore Ts'o goto out4; 4841857ac889SLukas Czerner 48425dabfc78STheodore Ts'o err = ext4_init_mballoc(); 4843ac27a0ecSDave Kleikamp if (err) 48446fd058f7STheodore Ts'o goto out3; 4845c9de560dSAlex Tomas 48465dabfc78STheodore Ts'o err = ext4_init_xattr(); 4847c9de560dSAlex Tomas if (err) 4848c9de560dSAlex Tomas goto out2; 4849ac27a0ecSDave Kleikamp err = init_inodecache(); 4850ac27a0ecSDave Kleikamp if (err) 4851ac27a0ecSDave Kleikamp goto out1; 485224b58424STheodore Ts'o register_as_ext2(); 485324b58424STheodore Ts'o register_as_ext3(); 485403010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4855ac27a0ecSDave Kleikamp if (err) 4856ac27a0ecSDave Kleikamp goto out; 4857bfff6873SLukas Czerner 4858bfff6873SLukas Czerner ext4_li_info = NULL; 4859bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 4860ac27a0ecSDave Kleikamp return 0; 4861ac27a0ecSDave Kleikamp out: 486224b58424STheodore Ts'o unregister_as_ext2(); 486324b58424STheodore Ts'o unregister_as_ext3(); 4864ac27a0ecSDave Kleikamp destroy_inodecache(); 4865ac27a0ecSDave Kleikamp out1: 48665dabfc78STheodore Ts'o ext4_exit_xattr(); 4867c9de560dSAlex Tomas out2: 48685dabfc78STheodore Ts'o ext4_exit_mballoc(); 48696fd058f7STheodore Ts'o out3: 48708f021222SLukas Czerner ext4_exit_feat_adverts(); 48716fd058f7STheodore Ts'o out4: 4872dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 4873bd2d0210STheodore Ts'o out5: 4874dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 4875dd68314cSTheodore Ts'o out6: 4876dd68314cSTheodore Ts'o ext4_exit_system_zone(); 4877dd68314cSTheodore Ts'o out7: 48785dabfc78STheodore Ts'o ext4_exit_pageio(); 4879ac27a0ecSDave Kleikamp return err; 4880ac27a0ecSDave Kleikamp } 4881ac27a0ecSDave Kleikamp 48825dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 4883ac27a0ecSDave Kleikamp { 4884bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 488524b58424STheodore Ts'o unregister_as_ext2(); 488624b58424STheodore Ts'o unregister_as_ext3(); 488703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4888ac27a0ecSDave Kleikamp destroy_inodecache(); 48895dabfc78STheodore Ts'o ext4_exit_xattr(); 48905dabfc78STheodore Ts'o ext4_exit_mballoc(); 48918f021222SLukas Czerner ext4_exit_feat_adverts(); 48929f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 48933197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 48945dabfc78STheodore Ts'o ext4_exit_system_zone(); 48955dabfc78STheodore Ts'o ext4_exit_pageio(); 4896ac27a0ecSDave Kleikamp } 4897ac27a0ecSDave Kleikamp 4898ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 489983982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4900ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 49015dabfc78STheodore Ts'o module_init(ext4_init_fs) 49025dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 4903