1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 43bfff6873SLukas Czerner #include <linux/kthread.h> 44bfff6873SLukas Czerner #include <linux/freezer.h> 45bfff6873SLukas Czerner 463dcf5451SChristoph Hellwig #include "ext4.h" 473dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 48ac27a0ecSDave Kleikamp #include "xattr.h" 49ac27a0ecSDave Kleikamp #include "acl.h" 503661d286STheodore Ts'o #include "mballoc.h" 51ac27a0ecSDave Kleikamp 529bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 539bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 549bffad1eSTheodore Ts'o 551f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 563197ebdbSTheodore Ts'o static struct kset *ext4_kset; 57bfff6873SLukas Czerner struct ext4_lazy_init *ext4_li_info; 58bfff6873SLukas Czerner struct mutex ext4_li_mtx; 59857ac889SLukas Czerner struct ext4_features *ext4_feat; 609f6200bbSTheodore Ts'o 61617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 62ac27a0ecSDave Kleikamp unsigned long journal_devnum); 63e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 64617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 65617ba13bSMingming Cao struct ext4_super_block *es); 66617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 69617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 70ac27a0ecSDave Kleikamp char nbuf[16]); 71617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 72617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 73c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 74617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 75c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 76152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 77152a0836SAl Viro const char *dev_name, void *data); 78bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 79bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 80ac27a0ecSDave Kleikamp 81ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 82ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 83ba69f9abSJan Kara .owner = THIS_MODULE, 84ba69f9abSJan Kara .name = "ext3", 85152a0836SAl Viro .mount = ext4_mount, 86ba69f9abSJan Kara .kill_sb = kill_block_super, 87ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 88ba69f9abSJan Kara }; 89ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 90ba69f9abSJan Kara #else 91ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 92ba69f9abSJan Kara #endif 93bd81d8eeSLaurent Vivier 948fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 958fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 96bd81d8eeSLaurent Vivier { 973a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 988fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 998fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 100bd81d8eeSLaurent Vivier } 101bd81d8eeSLaurent Vivier 1028fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1038fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 104bd81d8eeSLaurent Vivier { 1055272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1068fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1078fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 108bd81d8eeSLaurent Vivier } 109bd81d8eeSLaurent Vivier 1108fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1118fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 112bd81d8eeSLaurent Vivier { 1135272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1148fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1158fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 116bd81d8eeSLaurent Vivier } 117bd81d8eeSLaurent Vivier 118560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 119560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 120560671a0SAneesh Kumar K.V { 121560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 122560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 123560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 124560671a0SAneesh Kumar K.V } 125560671a0SAneesh Kumar K.V 126560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 127560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 128560671a0SAneesh Kumar K.V { 129560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 130560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 131560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 132560671a0SAneesh Kumar K.V } 133560671a0SAneesh Kumar K.V 134560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 135560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 136560671a0SAneesh Kumar K.V { 137560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 138560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 139560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 140560671a0SAneesh Kumar K.V } 141560671a0SAneesh Kumar K.V 142560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 143560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 144560671a0SAneesh Kumar K.V { 145560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 146560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 147560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 148560671a0SAneesh Kumar K.V } 149560671a0SAneesh Kumar K.V 1508fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1518fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 152bd81d8eeSLaurent Vivier { 1533a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1548fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1558fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 156bd81d8eeSLaurent Vivier } 157bd81d8eeSLaurent Vivier 1588fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1598fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 160bd81d8eeSLaurent Vivier { 1615272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1628fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1638fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 164bd81d8eeSLaurent Vivier } 165bd81d8eeSLaurent Vivier 1668fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1678fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 168bd81d8eeSLaurent Vivier { 1695272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1708fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1718fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 172bd81d8eeSLaurent Vivier } 173bd81d8eeSLaurent Vivier 174560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 175560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 176560671a0SAneesh Kumar K.V { 177560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 178560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 179560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 180560671a0SAneesh Kumar K.V } 181560671a0SAneesh Kumar K.V 182560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 183560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 184560671a0SAneesh Kumar K.V { 185560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 186560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 187560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 188560671a0SAneesh Kumar K.V } 189560671a0SAneesh Kumar K.V 190560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 191560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 192560671a0SAneesh Kumar K.V { 193560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 194560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 195560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 196560671a0SAneesh Kumar K.V } 197560671a0SAneesh Kumar K.V 198560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 199560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 200560671a0SAneesh Kumar K.V { 201560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 202560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 203560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 204560671a0SAneesh Kumar K.V } 205560671a0SAneesh Kumar K.V 206d3d1faf6SCurt Wohlgemuth 207d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 208d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 209d3d1faf6SCurt Wohlgemuth { 210d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 211d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 212d3d1faf6SCurt Wohlgemuth 213d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 214d3d1faf6SCurt Wohlgemuth 215d3d1faf6SCurt Wohlgemuth ref_cnt++; 216d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 217d3d1faf6SCurt Wohlgemuth 218d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 219d3d1faf6SCurt Wohlgemuth return handle; 220d3d1faf6SCurt Wohlgemuth } 221d3d1faf6SCurt Wohlgemuth 222d3d1faf6SCurt Wohlgemuth 223d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 224d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 225d3d1faf6SCurt Wohlgemuth { 226d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 227d3d1faf6SCurt Wohlgemuth 228d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 229d3d1faf6SCurt Wohlgemuth 230d3d1faf6SCurt Wohlgemuth ref_cnt--; 231d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 232d3d1faf6SCurt Wohlgemuth 233d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 234d3d1faf6SCurt Wohlgemuth } 235d3d1faf6SCurt Wohlgemuth 236ac27a0ecSDave Kleikamp /* 237dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 238ac27a0ecSDave Kleikamp * 239ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 240ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 241ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 242ac27a0ecSDave Kleikamp * appropriate. 243ac27a0ecSDave Kleikamp */ 244617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 245ac27a0ecSDave Kleikamp { 246ac27a0ecSDave Kleikamp journal_t *journal; 247ac27a0ecSDave Kleikamp 248ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 249ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 250ac27a0ecSDave Kleikamp 251437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 252ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 253ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 254ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 255617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2560390131bSFrank Mayhar if (journal) { 257ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 258c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 259ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 260ac27a0ecSDave Kleikamp } 261dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 262ac27a0ecSDave Kleikamp } 263d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2640390131bSFrank Mayhar } 265ac27a0ecSDave Kleikamp 266ac27a0ecSDave Kleikamp /* 267ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 268dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 269ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 270ac27a0ecSDave Kleikamp * appropriate. 271ac27a0ecSDave Kleikamp */ 272c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 273ac27a0ecSDave Kleikamp { 274ac27a0ecSDave Kleikamp struct super_block *sb; 275ac27a0ecSDave Kleikamp int err; 276ac27a0ecSDave Kleikamp int rc; 277ac27a0ecSDave Kleikamp 2780390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 279d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2800390131bSFrank Mayhar return 0; 2810390131bSFrank Mayhar } 282ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 283ac27a0ecSDave Kleikamp err = handle->h_err; 284dab291afSMingming Cao rc = jbd2_journal_stop(handle); 285ac27a0ecSDave Kleikamp 286ac27a0ecSDave Kleikamp if (!err) 287ac27a0ecSDave Kleikamp err = rc; 288ac27a0ecSDave Kleikamp if (err) 289c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 290ac27a0ecSDave Kleikamp return err; 291ac27a0ecSDave Kleikamp } 292ac27a0ecSDave Kleikamp 29390c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 29490c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 29590c7201bSTheodore Ts'o handle_t *handle, int err) 296ac27a0ecSDave Kleikamp { 297ac27a0ecSDave Kleikamp char nbuf[16]; 298617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 299ac27a0ecSDave Kleikamp 3000390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3010390131bSFrank Mayhar 302ac27a0ecSDave Kleikamp if (bh) 303ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 304ac27a0ecSDave Kleikamp 305ac27a0ecSDave Kleikamp if (!handle->h_err) 306ac27a0ecSDave Kleikamp handle->h_err = err; 307ac27a0ecSDave Kleikamp 308ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 309ac27a0ecSDave Kleikamp return; 310ac27a0ecSDave Kleikamp 31190c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 31290c7201bSTheodore Ts'o caller, line, errstr, err_fn); 313ac27a0ecSDave Kleikamp 314dab291afSMingming Cao jbd2_journal_abort_handle(handle); 315ac27a0ecSDave Kleikamp } 316ac27a0ecSDave Kleikamp 3171c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3181c13d5c0STheodore Ts'o unsigned int line) 3191c13d5c0STheodore Ts'o { 3201c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3211c13d5c0STheodore Ts'o 3221c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3231c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3241c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3251c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3261c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3271c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3281c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3291c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3301c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3311c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3321c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3331c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3341c13d5c0STheodore Ts'o } 33566e61a9eSTheodore Ts'o /* 33666e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33766e61a9eSTheodore Ts'o * started already 33866e61a9eSTheodore Ts'o */ 33966e61a9eSTheodore Ts'o if (!es->s_error_count) 34066e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 3411c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 3421c13d5c0STheodore Ts'o } 3431c13d5c0STheodore Ts'o 3441c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3451c13d5c0STheodore Ts'o unsigned int line) 3461c13d5c0STheodore Ts'o { 3471c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3481c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3491c13d5c0STheodore Ts'o } 3501c13d5c0STheodore Ts'o 3511c13d5c0STheodore Ts'o 352ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 353ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 354ac27a0ecSDave Kleikamp * 355ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 356617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 357ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 358ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 359ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 360ac27a0ecSDave Kleikamp * write out the superblock safely. 361ac27a0ecSDave Kleikamp * 362dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 363d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 364ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 365ac27a0ecSDave Kleikamp */ 366ac27a0ecSDave Kleikamp 367617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 368ac27a0ecSDave Kleikamp { 369ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 370ac27a0ecSDave Kleikamp return; 371ac27a0ecSDave Kleikamp 372ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 373617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 374ac27a0ecSDave Kleikamp 3754ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 376ac27a0ecSDave Kleikamp if (journal) 377dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 378ac27a0ecSDave Kleikamp } 379ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 380b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 381ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 382ac27a0ecSDave Kleikamp } 383ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 384617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 385ac27a0ecSDave Kleikamp sb->s_id); 386ac27a0ecSDave Kleikamp } 387ac27a0ecSDave Kleikamp 38812062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 389c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 390ac27a0ecSDave Kleikamp { 3910ff2ea7dSJoe Perches struct va_format vaf; 392ac27a0ecSDave Kleikamp va_list args; 393ac27a0ecSDave Kleikamp 394ac27a0ecSDave Kleikamp va_start(args, fmt); 3950ff2ea7dSJoe Perches vaf.fmt = fmt; 3960ff2ea7dSJoe Perches vaf.va = &args; 3970ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 3980ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 399ac27a0ecSDave Kleikamp va_end(args); 400ac27a0ecSDave Kleikamp 401617ba13bSMingming Cao ext4_handle_error(sb); 402ac27a0ecSDave Kleikamp } 403ac27a0ecSDave Kleikamp 404c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 405c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 406273df556SFrank Mayhar const char *fmt, ...) 407273df556SFrank Mayhar { 408273df556SFrank Mayhar va_list args; 409*f7c21177STheodore Ts'o struct va_format vaf; 4101c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 411273df556SFrank Mayhar 4121c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4131c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4141c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 415273df556SFrank Mayhar va_start(args, fmt); 416*f7c21177STheodore Ts'o vaf.fmt = fmt; 417*f7c21177STheodore Ts'o vaf.va = &args; 418c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 419c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 420c398eda0STheodore Ts'o if (block) 421*f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 422*f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); 423273df556SFrank Mayhar va_end(args); 424273df556SFrank Mayhar 425273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 426273df556SFrank Mayhar } 427273df556SFrank Mayhar 428c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 429*f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 430*f7c21177STheodore Ts'o const char *fmt, ...) 431273df556SFrank Mayhar { 432273df556SFrank Mayhar va_list args; 433*f7c21177STheodore Ts'o struct va_format vaf; 4341c13d5c0STheodore Ts'o struct ext4_super_block *es; 435273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 436273df556SFrank Mayhar char pathname[80], *path; 437273df556SFrank Mayhar 4381c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4391c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4401c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 441273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 442f9a62d09SDan Carpenter if (IS_ERR(path)) 443273df556SFrank Mayhar path = "(unknown)"; 444273df556SFrank Mayhar printk(KERN_CRIT 445*f7c21177STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 446*f7c21177STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 447*f7c21177STheodore Ts'o if (block) 448*f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 449*f7c21177STheodore Ts'o va_start(args, fmt); 450*f7c21177STheodore Ts'o vaf.fmt = fmt; 451*f7c21177STheodore Ts'o vaf.va = &args; 452*f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); 453273df556SFrank Mayhar va_end(args); 454273df556SFrank Mayhar 455273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 456273df556SFrank Mayhar } 457273df556SFrank Mayhar 458617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 459ac27a0ecSDave Kleikamp char nbuf[16]) 460ac27a0ecSDave Kleikamp { 461ac27a0ecSDave Kleikamp char *errstr = NULL; 462ac27a0ecSDave Kleikamp 463ac27a0ecSDave Kleikamp switch (errno) { 464ac27a0ecSDave Kleikamp case -EIO: 465ac27a0ecSDave Kleikamp errstr = "IO failure"; 466ac27a0ecSDave Kleikamp break; 467ac27a0ecSDave Kleikamp case -ENOMEM: 468ac27a0ecSDave Kleikamp errstr = "Out of memory"; 469ac27a0ecSDave Kleikamp break; 470ac27a0ecSDave Kleikamp case -EROFS: 47178f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 47278f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 473ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 474ac27a0ecSDave Kleikamp else 475ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 476ac27a0ecSDave Kleikamp break; 477ac27a0ecSDave Kleikamp default: 478ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 479ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 480ac27a0ecSDave Kleikamp * NULL. */ 481ac27a0ecSDave Kleikamp if (nbuf) { 482ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 483ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 484ac27a0ecSDave Kleikamp errstr = nbuf; 485ac27a0ecSDave Kleikamp } 486ac27a0ecSDave Kleikamp break; 487ac27a0ecSDave Kleikamp } 488ac27a0ecSDave Kleikamp 489ac27a0ecSDave Kleikamp return errstr; 490ac27a0ecSDave Kleikamp } 491ac27a0ecSDave Kleikamp 492617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 493ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 494ac27a0ecSDave Kleikamp 495c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 496c398eda0STheodore Ts'o unsigned int line, int errno) 497ac27a0ecSDave Kleikamp { 498ac27a0ecSDave Kleikamp char nbuf[16]; 499ac27a0ecSDave Kleikamp const char *errstr; 500ac27a0ecSDave Kleikamp 501ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 502ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 503ac27a0ecSDave Kleikamp * an error. */ 504ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 505ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 506ac27a0ecSDave Kleikamp return; 507ac27a0ecSDave Kleikamp 508617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 509c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 510c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5111c13d5c0STheodore Ts'o save_error_info(sb, function, line); 512ac27a0ecSDave Kleikamp 513617ba13bSMingming Cao ext4_handle_error(sb); 514ac27a0ecSDave Kleikamp } 515ac27a0ecSDave Kleikamp 516ac27a0ecSDave Kleikamp /* 517617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 518ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 519ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 520ac27a0ecSDave Kleikamp * 521ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 522ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 523ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 524ac27a0ecSDave Kleikamp */ 525ac27a0ecSDave Kleikamp 526c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 527c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 528ac27a0ecSDave Kleikamp { 529ac27a0ecSDave Kleikamp va_list args; 530ac27a0ecSDave Kleikamp 5311c13d5c0STheodore Ts'o save_error_info(sb, function, line); 532ac27a0ecSDave Kleikamp va_start(args, fmt); 533c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 534c398eda0STheodore Ts'o function, line); 535ac27a0ecSDave Kleikamp vprintk(fmt, args); 536ac27a0ecSDave Kleikamp printk("\n"); 537ac27a0ecSDave Kleikamp va_end(args); 538ac27a0ecSDave Kleikamp 5391c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 540b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 541ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5424ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 543ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 544dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5451c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5461c13d5c0STheodore Ts'o } 5471c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5481c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 549ac27a0ecSDave Kleikamp } 550ac27a0ecSDave Kleikamp 5510ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 552b31e1552SEric Sandeen { 5530ff2ea7dSJoe Perches struct va_format vaf; 554b31e1552SEric Sandeen va_list args; 555b31e1552SEric Sandeen 556b31e1552SEric Sandeen va_start(args, fmt); 5570ff2ea7dSJoe Perches vaf.fmt = fmt; 5580ff2ea7dSJoe Perches vaf.va = &args; 5590ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 560b31e1552SEric Sandeen va_end(args); 561b31e1552SEric Sandeen } 562b31e1552SEric Sandeen 56312062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 564c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 565ac27a0ecSDave Kleikamp { 5660ff2ea7dSJoe Perches struct va_format vaf; 567ac27a0ecSDave Kleikamp va_list args; 568ac27a0ecSDave Kleikamp 569ac27a0ecSDave Kleikamp va_start(args, fmt); 5700ff2ea7dSJoe Perches vaf.fmt = fmt; 5710ff2ea7dSJoe Perches vaf.va = &args; 5720ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 5730ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 574ac27a0ecSDave Kleikamp va_end(args); 575ac27a0ecSDave Kleikamp } 576ac27a0ecSDave Kleikamp 577e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 578e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 579e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 580e29136f8STheodore Ts'o const char *fmt, ...) 5815d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5825d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5835d1b1b3fSAneesh Kumar K.V { 5840ff2ea7dSJoe Perches struct va_format vaf; 5855d1b1b3fSAneesh Kumar K.V va_list args; 5865d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5875d1b1b3fSAneesh Kumar K.V 5881c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 5891c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5901c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 5910ff2ea7dSJoe Perches 5925d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 5930ff2ea7dSJoe Perches 5940ff2ea7dSJoe Perches vaf.fmt = fmt; 5950ff2ea7dSJoe Perches vaf.va = &args; 596e29136f8STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", 597e29136f8STheodore Ts'o sb->s_id, function, line, grp); 598e29136f8STheodore Ts'o if (ino) 5990ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 600e29136f8STheodore Ts'o if (block) 6010ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 6020ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6035d1b1b3fSAneesh Kumar K.V va_end(args); 6045d1b1b3fSAneesh Kumar K.V 6055d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 606e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6075d1b1b3fSAneesh Kumar K.V return; 6085d1b1b3fSAneesh Kumar K.V } 6091c13d5c0STheodore Ts'o 6105d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6115d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6125d1b1b3fSAneesh Kumar K.V /* 6135d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6145d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6155d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6165d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6175d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 6185d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 6195d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6205d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6215d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6225d1b1b3fSAneesh Kumar K.V */ 6235d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6245d1b1b3fSAneesh Kumar K.V return; 6255d1b1b3fSAneesh Kumar K.V } 6265d1b1b3fSAneesh Kumar K.V 627617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 628ac27a0ecSDave Kleikamp { 629617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 630ac27a0ecSDave Kleikamp 631617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 632ac27a0ecSDave Kleikamp return; 633ac27a0ecSDave Kleikamp 63412062dddSEric Sandeen ext4_warning(sb, 635ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 636ac27a0ecSDave Kleikamp "running e2fsck is recommended", 637617ba13bSMingming Cao EXT4_DYNAMIC_REV); 638ac27a0ecSDave Kleikamp 639617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 640617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 641617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 642ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 643ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 644ac27a0ecSDave Kleikamp 645ac27a0ecSDave Kleikamp /* 646ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 647ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 648ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 649ac27a0ecSDave Kleikamp */ 650ac27a0ecSDave Kleikamp } 651ac27a0ecSDave Kleikamp 652ac27a0ecSDave Kleikamp /* 653ac27a0ecSDave Kleikamp * Open the external journal device 654ac27a0ecSDave Kleikamp */ 655b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 656ac27a0ecSDave Kleikamp { 657ac27a0ecSDave Kleikamp struct block_device *bdev; 658ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 659ac27a0ecSDave Kleikamp 660ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 661ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 662ac27a0ecSDave Kleikamp goto fail; 663ac27a0ecSDave Kleikamp return bdev; 664ac27a0ecSDave Kleikamp 665ac27a0ecSDave Kleikamp fail: 666b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 667ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 668ac27a0ecSDave Kleikamp return NULL; 669ac27a0ecSDave Kleikamp } 670ac27a0ecSDave Kleikamp 671ac27a0ecSDave Kleikamp /* 672ac27a0ecSDave Kleikamp * Release the journal device 673ac27a0ecSDave Kleikamp */ 674617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 675ac27a0ecSDave Kleikamp { 676ac27a0ecSDave Kleikamp bd_release(bdev); 6779a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 678ac27a0ecSDave Kleikamp } 679ac27a0ecSDave Kleikamp 680617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 681ac27a0ecSDave Kleikamp { 682ac27a0ecSDave Kleikamp struct block_device *bdev; 683ac27a0ecSDave Kleikamp int ret = -ENODEV; 684ac27a0ecSDave Kleikamp 685ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 686ac27a0ecSDave Kleikamp if (bdev) { 687617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 688ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 689ac27a0ecSDave Kleikamp } 690ac27a0ecSDave Kleikamp return ret; 691ac27a0ecSDave Kleikamp } 692ac27a0ecSDave Kleikamp 693ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 694ac27a0ecSDave Kleikamp { 695617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 696ac27a0ecSDave Kleikamp } 697ac27a0ecSDave Kleikamp 698617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 699ac27a0ecSDave Kleikamp { 700ac27a0ecSDave Kleikamp struct list_head *l; 701ac27a0ecSDave Kleikamp 702b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 703ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 704ac27a0ecSDave Kleikamp 705ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 706ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 707ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 708ac27a0ecSDave Kleikamp printk(KERN_ERR " " 709ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 710ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 711ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 712ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 713ac27a0ecSDave Kleikamp } 714ac27a0ecSDave Kleikamp } 715ac27a0ecSDave Kleikamp 716617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 717ac27a0ecSDave Kleikamp { 718617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 719617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 720ef2cabf7SHidehiro Kawai int i, err; 721ac27a0ecSDave Kleikamp 722857ac889SLukas Czerner ext4_unregister_li_request(sb); 723e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 724e0ccfd95SChristoph Hellwig 7254c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7264c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7274c0425ffSMingming Cao 728a9e220f8SAl Viro lock_super(sb); 7298c85e125SChristoph Hellwig if (sb->s_dirt) 730ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 7318c85e125SChristoph Hellwig 7320390131bSFrank Mayhar if (sbi->s_journal) { 733ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 73447b4a50bSJan Kara sbi->s_journal = NULL; 735ef2cabf7SHidehiro Kawai if (err < 0) 736c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7370390131bSFrank Mayhar } 738d4edac31SJosef Bacik 739a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 740d4edac31SJosef Bacik ext4_release_system_zone(sb); 741d4edac31SJosef Bacik ext4_mb_release(sb); 742d4edac31SJosef Bacik ext4_ext_release(sb); 743d4edac31SJosef Bacik ext4_xattr_put_super(sb); 744d4edac31SJosef Bacik 745ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 746617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 747ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 748e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 749ac27a0ecSDave Kleikamp } 750240799cdSTheodore Ts'o if (sbi->s_proc) { 7519f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 752240799cdSTheodore Ts'o } 7533197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 754ac27a0ecSDave Kleikamp 755ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 756ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 757ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 758c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 759c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 760c5ca7c76STheodore Ts'o else 761772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 762ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 763ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 764ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 7656bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 766ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 767ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 768ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 769ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 770ac27a0ecSDave Kleikamp #endif 771ac27a0ecSDave Kleikamp 772ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 773ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 774ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 775ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 776ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 777ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 778ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 779ac27a0ecSDave Kleikamp 780f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 781ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 782ac27a0ecSDave Kleikamp /* 783ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 784ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 785ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 786ac27a0ecSDave Kleikamp */ 787ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 788f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 789617ba13bSMingming Cao ext4_blkdev_remove(sbi); 790ac27a0ecSDave Kleikamp } 791ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7923197ebdbSTheodore Ts'o /* 7933197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7943197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7953197ebdbSTheodore Ts'o */ 7963197ebdbSTheodore Ts'o unlock_super(sb); 7973197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7983197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 799705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 800ac27a0ecSDave Kleikamp kfree(sbi); 801ac27a0ecSDave Kleikamp } 802ac27a0ecSDave Kleikamp 803e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 804ac27a0ecSDave Kleikamp 805ac27a0ecSDave Kleikamp /* 806ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 807ac27a0ecSDave Kleikamp */ 808617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 809ac27a0ecSDave Kleikamp { 810617ba13bSMingming Cao struct ext4_inode_info *ei; 811ac27a0ecSDave Kleikamp 812e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 813ac27a0ecSDave Kleikamp if (!ei) 814ac27a0ecSDave Kleikamp return NULL; 8150b8e58a1SAndreas Dilger 816ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 81791246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 818a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 819c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 820c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8210390131bSFrank Mayhar /* 8220390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 8230390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 8240390131bSFrank Mayhar * jinode. 8250390131bSFrank Mayhar */ 826678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 827d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 828d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 829d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8309d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 831d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 832d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 833a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 834a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 835a9e7f447SDmitry Monakhov #endif 836c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 837744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 8388d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 839b436b9beSJan Kara ei->i_sync_tid = 0; 840b436b9beSJan Kara ei->i_datasync_tid = 0; 841f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 8420b8e58a1SAndreas Dilger 843ac27a0ecSDave Kleikamp return &ei->vfs_inode; 844ac27a0ecSDave Kleikamp } 845ac27a0ecSDave Kleikamp 8467ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 8477ff9c073STheodore Ts'o { 8487ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 8497ff9c073STheodore Ts'o 8507ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 8517ff9c073STheodore Ts'o return drop; 8527ff9c073STheodore Ts'o } 8537ff9c073STheodore Ts'o 854617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 855ac27a0ecSDave Kleikamp { 856f7ad6d2eSTheodore Ts'o ext4_ioend_wait(inode); 8579f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 858b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 859b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 860b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 8619f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 8629f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 8639f7dd93dSVasily Averin true); 8649f7dd93dSVasily Averin dump_stack(); 8659f7dd93dSVasily Averin } 866617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 867ac27a0ecSDave Kleikamp } 868ac27a0ecSDave Kleikamp 86951cc5068SAlexey Dobriyan static void init_once(void *foo) 870ac27a0ecSDave Kleikamp { 871617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 872ac27a0ecSDave Kleikamp 873ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 87403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 875ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 876ac27a0ecSDave Kleikamp #endif 8770e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 878ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 879ac27a0ecSDave Kleikamp } 880ac27a0ecSDave Kleikamp 881ac27a0ecSDave Kleikamp static int init_inodecache(void) 882ac27a0ecSDave Kleikamp { 883617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 884617ba13bSMingming Cao sizeof(struct ext4_inode_info), 885ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 886ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 88720c2df83SPaul Mundt init_once); 888617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 889ac27a0ecSDave Kleikamp return -ENOMEM; 890ac27a0ecSDave Kleikamp return 0; 891ac27a0ecSDave Kleikamp } 892ac27a0ecSDave Kleikamp 893ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 894ac27a0ecSDave Kleikamp { 895617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 896ac27a0ecSDave Kleikamp } 897ac27a0ecSDave Kleikamp 8980930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 899ac27a0ecSDave Kleikamp { 9000930fcc1SAl Viro invalidate_inode_buffers(inode); 9010930fcc1SAl Viro end_writeback(inode); 9029f754758SChristoph Hellwig dquot_drop(inode); 903c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 9040390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 905678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 906678aaf48SJan Kara &EXT4_I(inode)->jinode); 907ac27a0ecSDave Kleikamp } 908ac27a0ecSDave Kleikamp 9092b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 9102b2d6d01STheodore Ts'o struct super_block *sb) 911ac27a0ecSDave Kleikamp { 912ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 913617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 914ac27a0ecSDave Kleikamp 9155a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 9165a20bdfcSJan Kara char *fmtname = ""; 9175a20bdfcSJan Kara 9185a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 9195a20bdfcSJan Kara case QFMT_VFS_OLD: 9205a20bdfcSJan Kara fmtname = "vfsold"; 9215a20bdfcSJan Kara break; 9225a20bdfcSJan Kara case QFMT_VFS_V0: 9235a20bdfcSJan Kara fmtname = "vfsv0"; 9245a20bdfcSJan Kara break; 9255a20bdfcSJan Kara case QFMT_VFS_V1: 9265a20bdfcSJan Kara fmtname = "vfsv1"; 9275a20bdfcSJan Kara break; 9285a20bdfcSJan Kara } 9295a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 9305a20bdfcSJan Kara } 931ac27a0ecSDave Kleikamp 932ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 933ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 934ac27a0ecSDave Kleikamp 935ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 936ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 937ac27a0ecSDave Kleikamp 938482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 939ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 940ac27a0ecSDave Kleikamp 941482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 942ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 943ac27a0ecSDave Kleikamp #endif 944ac27a0ecSDave Kleikamp } 945ac27a0ecSDave Kleikamp 946d9c9bef1SMiklos Szeredi /* 947d9c9bef1SMiklos Szeredi * Show an option if 948d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 949d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 950d9c9bef1SMiklos Szeredi */ 951617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 952ac27a0ecSDave Kleikamp { 953aa22df2cSAneesh Kumar K.V int def_errors; 954aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 955ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 956d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 957d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 958d9c9bef1SMiklos Szeredi 959d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 960aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 961d9c9bef1SMiklos Szeredi 962d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 963d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 964d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 965d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 966aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 967d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 968d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 969d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 970d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 971d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 972d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 973d9c9bef1SMiklos Szeredi } 974d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 975d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 976d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 977d9c9bef1SMiklos Szeredi } 978bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 979d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 980bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 981d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 982bb4f397aSAneesh Kumar K.V } 983bb4f397aSAneesh Kumar K.V } 984aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 985bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 986aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 987d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 988aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 989d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 990aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 991d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 992d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 993d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 99403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 995aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 996aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 997d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 998d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 999d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 1000d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 1001d9c9bef1SMiklos Szeredi } 1002d9c9bef1SMiklos Szeredi #endif 100303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1004aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 1005d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 1006d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 1007d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 1008d9c9bef1SMiklos Szeredi #endif 100930773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 1010d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 1011d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 1012d9c9bef1SMiklos Szeredi } 101330773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 101430773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 101530773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 101630773840STheodore Ts'o } 101730773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 101830773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 101930773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 102030773840STheodore Ts'o } 102130773840STheodore Ts'o 1022571640caSEric Sandeen /* 1023571640caSEric Sandeen * We're changing the default of barrier mount option, so 1024571640caSEric Sandeen * let's always display its mount state so it's clear what its 1025571640caSEric Sandeen * status is. 1026571640caSEric Sandeen */ 1027571640caSEric Sandeen seq_puts(seq, ",barrier="); 1028571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1029cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1030cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 103139a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 103239a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 103325ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 103425ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 10358b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 10368b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1037dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1038dd919b98SAneesh Kumar K.V 10391449032bSTheodore Ts'o if (test_opt(sb, MBLK_IO_SUBMIT)) 10401449032bSTheodore Ts'o seq_puts(seq, ",mblk_io_submit"); 1041cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1042cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1043aa22df2cSAneesh Kumar K.V /* 1044aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1045aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1046aa22df2cSAneesh Kumar K.V */ 1047617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1048ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1049617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1050ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1051617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1052ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1053ac27a0ecSDave Kleikamp 1054240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1055240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1056240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1057240799cdSTheodore Ts'o 10585bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 10595bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 10605bf5683aSHidehiro Kawai 1061afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 106206705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1063afd4672dSTheodore Ts'o 10648b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 10655328e635SEric Sandeen seq_puts(seq, ",discard"); 10665328e635SEric Sandeen 1067e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1068e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1069e3bb52aeSEric Sandeen 1070744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1071744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1072744692dcSJiaying Zhang 10738b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 10748b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 10758b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 10768b67f04aSTheodore Ts'o 1077bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1078bfff6873SLukas Czerner seq_puts(seq, ",noinit_inode_table"); 1079bfff6873SLukas Czerner else if (sbi->s_li_wait_mult) 1080bfff6873SLukas Czerner seq_printf(seq, ",init_inode_table=%u", 1081bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1082bfff6873SLukas Czerner 1083617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 10840b8e58a1SAndreas Dilger 1085ac27a0ecSDave Kleikamp return 0; 1086ac27a0ecSDave Kleikamp } 1087ac27a0ecSDave Kleikamp 10881b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10891b961ac0SChristoph Hellwig u64 ino, u32 generation) 1090ac27a0ecSDave Kleikamp { 1091ac27a0ecSDave Kleikamp struct inode *inode; 1092ac27a0ecSDave Kleikamp 1093617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1094ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1095617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1096ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1097ac27a0ecSDave Kleikamp 1098ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1099ac27a0ecSDave Kleikamp * 1100617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1101ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1102ac27a0ecSDave Kleikamp * 1103ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1104ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1105ac27a0ecSDave Kleikamp */ 11061d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 11071d1fe1eeSDavid Howells if (IS_ERR(inode)) 11081d1fe1eeSDavid Howells return ERR_CAST(inode); 11091d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1110ac27a0ecSDave Kleikamp iput(inode); 1111ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1112ac27a0ecSDave Kleikamp } 11131b961ac0SChristoph Hellwig 11141b961ac0SChristoph Hellwig return inode; 1115ac27a0ecSDave Kleikamp } 11161b961ac0SChristoph Hellwig 11171b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11181b961ac0SChristoph Hellwig int fh_len, int fh_type) 11191b961ac0SChristoph Hellwig { 11201b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11211b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11221b961ac0SChristoph Hellwig } 11231b961ac0SChristoph Hellwig 11241b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11251b961ac0SChristoph Hellwig int fh_len, int fh_type) 11261b961ac0SChristoph Hellwig { 11271b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11281b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1129ac27a0ecSDave Kleikamp } 1130ac27a0ecSDave Kleikamp 1131c39a7f84SToshiyuki Okajima /* 1132c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1133c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1134c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1135c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1136c39a7f84SToshiyuki Okajima */ 11370b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11380b8e58a1SAndreas Dilger gfp_t wait) 1139c39a7f84SToshiyuki Okajima { 1140c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1141c39a7f84SToshiyuki Okajima 1142c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1143c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1144c39a7f84SToshiyuki Okajima return 0; 1145c39a7f84SToshiyuki Okajima if (journal) 1146c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1147c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1148c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1149c39a7f84SToshiyuki Okajima } 1150c39a7f84SToshiyuki Okajima 1151ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1152ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1153ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1154ac27a0ecSDave Kleikamp 1155617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1156617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1157617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1158617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1159617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11606f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1161307ae18aSChristoph Hellwig char *path); 1162ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1163617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1164617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1165ac27a0ecSDave Kleikamp size_t len, loff_t off); 1166617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1167ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1168ac27a0ecSDave Kleikamp 116961e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1170a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 117160e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1172a9e7f447SDmitry Monakhov #endif 1173617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1174617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1175617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1176617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1177a5b5ee32SJan Kara .write_info = ext4_write_info, 1178a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1179a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1180ac27a0ecSDave Kleikamp }; 1181ac27a0ecSDave Kleikamp 11820d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1183617ba13bSMingming Cao .quota_on = ext4_quota_on, 1184ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1185287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1186287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1187287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1188287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1189287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1190ac27a0ecSDave Kleikamp }; 1191ac27a0ecSDave Kleikamp #endif 1192ac27a0ecSDave Kleikamp 1193ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1194617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1195617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1196617ba13bSMingming Cao .write_inode = ext4_write_inode, 1197617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11987ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11990930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1200617ba13bSMingming Cao .put_super = ext4_put_super, 1201617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1202c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1203c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1204617ba13bSMingming Cao .statfs = ext4_statfs, 1205617ba13bSMingming Cao .remount_fs = ext4_remount, 1206617ba13bSMingming Cao .show_options = ext4_show_options, 1207ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1208617ba13bSMingming Cao .quota_read = ext4_quota_read, 1209617ba13bSMingming Cao .quota_write = ext4_quota_write, 1210ac27a0ecSDave Kleikamp #endif 1211c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1212ac27a0ecSDave Kleikamp }; 1213ac27a0ecSDave Kleikamp 12149ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 12159ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 12169ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 12179ca92389STheodore Ts'o .write_inode = ext4_write_inode, 12189ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 12197ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12200930fcc1SAl Viro .evict_inode = ext4_evict_inode, 12219ca92389STheodore Ts'o .write_super = ext4_write_super, 12229ca92389STheodore Ts'o .put_super = ext4_put_super, 12239ca92389STheodore Ts'o .statfs = ext4_statfs, 12249ca92389STheodore Ts'o .remount_fs = ext4_remount, 12259ca92389STheodore Ts'o .show_options = ext4_show_options, 12269ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12279ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12289ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12299ca92389STheodore Ts'o #endif 12309ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12319ca92389STheodore Ts'o }; 12329ca92389STheodore Ts'o 123339655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12341b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12351b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1236617ba13bSMingming Cao .get_parent = ext4_get_parent, 1237ac27a0ecSDave Kleikamp }; 1238ac27a0ecSDave Kleikamp 1239ac27a0ecSDave Kleikamp enum { 1240ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1241ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 124201436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1243ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 124406705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 124530773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1246c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1247818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1248ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1249296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1250ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12515a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 12525a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 12535a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 12541449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12551449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12565328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1257744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 12585328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1259bfff6873SLukas Czerner Opt_init_inode_table, Opt_noinit_inode_table, 1260ac27a0ecSDave Kleikamp }; 1261ac27a0ecSDave Kleikamp 1262a447c093SSteven Whitehouse static const match_table_t tokens = { 1263ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1264ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1265ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1266ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1267ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1268ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1269ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1270ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1271ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1272ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1273ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1274ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1275ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1276ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1277ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1278ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1279ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1280ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1281ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1282ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1283ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1284e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1285ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1286ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1287ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 128830773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 128930773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1290ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1291ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1292818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1293818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1294ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1295ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1296ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1297ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12985bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12995bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1300ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1301ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1302ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1303ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1304ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1305ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13065a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1307ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1308ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1309ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1310ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1311ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 131206705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 131306705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 131425ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1315c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1316ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 131764769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1318dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 13191449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 13201449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 13216fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13226fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1323240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1324b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1325afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 132606705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 132706705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1328744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1329744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13305328e635SEric Sandeen {Opt_discard, "discard"}, 13315328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1332bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable=%u"}, 1333bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable"}, 1334bfff6873SLukas Czerner {Opt_noinit_inode_table, "noinit_itable"}, 1335f3f12faaSJosef Bacik {Opt_err, NULL}, 1336ac27a0ecSDave Kleikamp }; 1337ac27a0ecSDave Kleikamp 1338617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1339ac27a0ecSDave Kleikamp { 1340617ba13bSMingming Cao ext4_fsblk_t sb_block; 1341ac27a0ecSDave Kleikamp char *options = (char *) *data; 1342ac27a0ecSDave Kleikamp 1343ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1344ac27a0ecSDave Kleikamp return 1; /* Default location */ 13450b8e58a1SAndreas Dilger 1346ac27a0ecSDave Kleikamp options += 3; 13470b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1348ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1349ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13504776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1351ac27a0ecSDave Kleikamp (char *) *data); 1352ac27a0ecSDave Kleikamp return 1; 1353ac27a0ecSDave Kleikamp } 1354ac27a0ecSDave Kleikamp if (*options == ',') 1355ac27a0ecSDave Kleikamp options++; 1356ac27a0ecSDave Kleikamp *data = (void *) options; 13570b8e58a1SAndreas Dilger 1358ac27a0ecSDave Kleikamp return sb_block; 1359ac27a0ecSDave Kleikamp } 1360ac27a0ecSDave Kleikamp 1361b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1362437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1363437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1364b3881f74STheodore Ts'o 136556c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 136656c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 136756c50f11SDmitry Monakhov { 136856c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 136956c50f11SDmitry Monakhov char *qname; 137056c50f11SDmitry Monakhov 137156c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 137256c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 137356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137456c50f11SDmitry Monakhov "Cannot change journaled " 137556c50f11SDmitry Monakhov "quota options when quota turned on"); 137656c50f11SDmitry Monakhov return 0; 137756c50f11SDmitry Monakhov } 137856c50f11SDmitry Monakhov qname = match_strdup(args); 137956c50f11SDmitry Monakhov if (!qname) { 138056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 138156c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 138256c50f11SDmitry Monakhov return 0; 138356c50f11SDmitry Monakhov } 138456c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 138556c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 138656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 138756c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 138856c50f11SDmitry Monakhov kfree(qname); 138956c50f11SDmitry Monakhov return 0; 139056c50f11SDmitry Monakhov } 139156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 139256c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 139356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 139456c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 139556c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 139656c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 139756c50f11SDmitry Monakhov return 0; 139856c50f11SDmitry Monakhov } 1399fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 140056c50f11SDmitry Monakhov return 1; 140156c50f11SDmitry Monakhov } 140256c50f11SDmitry Monakhov 140356c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 140456c50f11SDmitry Monakhov { 140556c50f11SDmitry Monakhov 140656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 140756c50f11SDmitry Monakhov 140856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 140956c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 141056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 141156c50f11SDmitry Monakhov " when quota turned on"); 141256c50f11SDmitry Monakhov return 0; 141356c50f11SDmitry Monakhov } 141456c50f11SDmitry Monakhov /* 141556c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 141656c50f11SDmitry Monakhov * to be correct 141756c50f11SDmitry Monakhov */ 141856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 141956c50f11SDmitry Monakhov return 1; 142056c50f11SDmitry Monakhov } 142156c50f11SDmitry Monakhov #endif 142256c50f11SDmitry Monakhov 1423ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1424c3191067STheodore Ts'o unsigned long *journal_devnum, 1425b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1426617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1427ac27a0ecSDave Kleikamp { 1428617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1429ac27a0ecSDave Kleikamp char *p; 1430ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1431ac27a0ecSDave Kleikamp int data_opt = 0; 1432ac27a0ecSDave Kleikamp int option; 1433ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 143456c50f11SDmitry Monakhov int qfmt; 1435ac27a0ecSDave Kleikamp #endif 1436ac27a0ecSDave Kleikamp 1437ac27a0ecSDave Kleikamp if (!options) 1438ac27a0ecSDave Kleikamp return 1; 1439ac27a0ecSDave Kleikamp 1440ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1441ac27a0ecSDave Kleikamp int token; 1442ac27a0ecSDave Kleikamp if (!*p) 1443ac27a0ecSDave Kleikamp continue; 1444ac27a0ecSDave Kleikamp 144515121c18SEric Sandeen /* 144615121c18SEric Sandeen * Initialize args struct so we know whether arg was 144715121c18SEric Sandeen * found; some options take optional arguments. 144815121c18SEric Sandeen */ 144915121c18SEric Sandeen args[0].to = args[0].from = 0; 1450ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1451ac27a0ecSDave Kleikamp switch (token) { 1452ac27a0ecSDave Kleikamp case Opt_bsd_df: 1453437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1454fd8c37ecSTheodore Ts'o clear_opt(sb, MINIX_DF); 1455ac27a0ecSDave Kleikamp break; 1456ac27a0ecSDave Kleikamp case Opt_minix_df: 1457437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1458fd8c37ecSTheodore Ts'o set_opt(sb, MINIX_DF); 1459437ca0fdSDmitry Monakhov 1460ac27a0ecSDave Kleikamp break; 1461ac27a0ecSDave Kleikamp case Opt_grpid: 1462437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1463fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 1464437ca0fdSDmitry Monakhov 1465ac27a0ecSDave Kleikamp break; 1466ac27a0ecSDave Kleikamp case Opt_nogrpid: 1467437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1468fd8c37ecSTheodore Ts'o clear_opt(sb, GRPID); 1469437ca0fdSDmitry Monakhov 1470ac27a0ecSDave Kleikamp break; 1471ac27a0ecSDave Kleikamp case Opt_resuid: 1472ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1473ac27a0ecSDave Kleikamp return 0; 1474ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1475ac27a0ecSDave Kleikamp break; 1476ac27a0ecSDave Kleikamp case Opt_resgid: 1477ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1478ac27a0ecSDave Kleikamp return 0; 1479ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1480ac27a0ecSDave Kleikamp break; 1481ac27a0ecSDave Kleikamp case Opt_sb: 1482ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1483ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1484ac27a0ecSDave Kleikamp break; 1485ac27a0ecSDave Kleikamp case Opt_err_panic: 1486fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1487fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1488fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 1489ac27a0ecSDave Kleikamp break; 1490ac27a0ecSDave Kleikamp case Opt_err_ro: 1491fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1492fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1493fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 1494ac27a0ecSDave Kleikamp break; 1495ac27a0ecSDave Kleikamp case Opt_err_cont: 1496fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1497fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1498fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 1499ac27a0ecSDave Kleikamp break; 1500ac27a0ecSDave Kleikamp case Opt_nouid32: 1501fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 1502ac27a0ecSDave Kleikamp break; 1503ac27a0ecSDave Kleikamp case Opt_debug: 1504fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 1505ac27a0ecSDave Kleikamp break; 1506ac27a0ecSDave Kleikamp case Opt_oldalloc: 1507fd8c37ecSTheodore Ts'o set_opt(sb, OLDALLOC); 1508ac27a0ecSDave Kleikamp break; 1509ac27a0ecSDave Kleikamp case Opt_orlov: 1510fd8c37ecSTheodore Ts'o clear_opt(sb, OLDALLOC); 1511ac27a0ecSDave Kleikamp break; 151203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1513ac27a0ecSDave Kleikamp case Opt_user_xattr: 1514fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 1515ac27a0ecSDave Kleikamp break; 1516ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1517fd8c37ecSTheodore Ts'o clear_opt(sb, XATTR_USER); 1518ac27a0ecSDave Kleikamp break; 1519ac27a0ecSDave Kleikamp #else 1520ac27a0ecSDave Kleikamp case Opt_user_xattr: 1521ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1522b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1523ac27a0ecSDave Kleikamp break; 1524ac27a0ecSDave Kleikamp #endif 152503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1526ac27a0ecSDave Kleikamp case Opt_acl: 1527fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 1528ac27a0ecSDave Kleikamp break; 1529ac27a0ecSDave Kleikamp case Opt_noacl: 1530fd8c37ecSTheodore Ts'o clear_opt(sb, POSIX_ACL); 1531ac27a0ecSDave Kleikamp break; 1532ac27a0ecSDave Kleikamp #else 1533ac27a0ecSDave Kleikamp case Opt_acl: 1534ac27a0ecSDave Kleikamp case Opt_noacl: 1535b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1536ac27a0ecSDave Kleikamp break; 1537ac27a0ecSDave Kleikamp #endif 1538ac27a0ecSDave Kleikamp case Opt_journal_update: 1539ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1540ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1541ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1542ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1543ac27a0ecSDave Kleikamp journal file. */ 1544ac27a0ecSDave Kleikamp if (is_remount) { 1545b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1546b31e1552SEric Sandeen "Cannot specify journal on remount"); 1547ac27a0ecSDave Kleikamp return 0; 1548ac27a0ecSDave Kleikamp } 1549fd8c37ecSTheodore Ts'o set_opt(sb, UPDATE_JOURNAL); 1550ac27a0ecSDave Kleikamp break; 1551ac27a0ecSDave Kleikamp case Opt_journal_dev: 1552ac27a0ecSDave Kleikamp if (is_remount) { 1553b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1554b31e1552SEric Sandeen "Cannot specify journal on remount"); 1555ac27a0ecSDave Kleikamp return 0; 1556ac27a0ecSDave Kleikamp } 1557ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1558ac27a0ecSDave Kleikamp return 0; 1559ac27a0ecSDave Kleikamp *journal_devnum = option; 1560ac27a0ecSDave Kleikamp break; 1561818d276cSGirish Shilamkar case Opt_journal_checksum: 1562fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1563d4da6c9cSLinus Torvalds break; 1564818d276cSGirish Shilamkar case Opt_journal_async_commit: 1565fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_ASYNC_COMMIT); 1566fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1567818d276cSGirish Shilamkar break; 1568ac27a0ecSDave Kleikamp case Opt_noload: 1569fd8c37ecSTheodore Ts'o set_opt(sb, NOLOAD); 1570ac27a0ecSDave Kleikamp break; 1571ac27a0ecSDave Kleikamp case Opt_commit: 1572ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1573ac27a0ecSDave Kleikamp return 0; 1574ac27a0ecSDave Kleikamp if (option < 0) 1575ac27a0ecSDave Kleikamp return 0; 1576ac27a0ecSDave Kleikamp if (option == 0) 1577cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1578ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1579ac27a0ecSDave Kleikamp break; 158030773840STheodore Ts'o case Opt_max_batch_time: 158130773840STheodore Ts'o if (match_int(&args[0], &option)) 158230773840STheodore Ts'o return 0; 158330773840STheodore Ts'o if (option < 0) 158430773840STheodore Ts'o return 0; 158530773840STheodore Ts'o if (option == 0) 158630773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 158730773840STheodore Ts'o sbi->s_max_batch_time = option; 158830773840STheodore Ts'o break; 158930773840STheodore Ts'o case Opt_min_batch_time: 159030773840STheodore Ts'o if (match_int(&args[0], &option)) 159130773840STheodore Ts'o return 0; 159230773840STheodore Ts'o if (option < 0) 159330773840STheodore Ts'o return 0; 159430773840STheodore Ts'o sbi->s_min_batch_time = option; 159530773840STheodore Ts'o break; 1596ac27a0ecSDave Kleikamp case Opt_data_journal: 1597617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1598ac27a0ecSDave Kleikamp goto datacheck; 1599ac27a0ecSDave Kleikamp case Opt_data_ordered: 1600617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1601ac27a0ecSDave Kleikamp goto datacheck; 1602ac27a0ecSDave Kleikamp case Opt_data_writeback: 1603617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1604ac27a0ecSDave Kleikamp datacheck: 1605ac27a0ecSDave Kleikamp if (is_remount) { 1606482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1607b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1608b31e1552SEric Sandeen "Cannot change data mode on remount"); 1609ac27a0ecSDave Kleikamp return 0; 1610ac27a0ecSDave Kleikamp } 1611ac27a0ecSDave Kleikamp } else { 1612fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 1613ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1614ac27a0ecSDave Kleikamp } 1615ac27a0ecSDave Kleikamp break; 16165bf5683aSHidehiro Kawai case Opt_data_err_abort: 1617fd8c37ecSTheodore Ts'o set_opt(sb, DATA_ERR_ABORT); 16185bf5683aSHidehiro Kawai break; 16195bf5683aSHidehiro Kawai case Opt_data_err_ignore: 1620fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_ERR_ABORT); 16215bf5683aSHidehiro Kawai break; 1622ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1623ac27a0ecSDave Kleikamp case Opt_usrjquota: 162456c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 162556c50f11SDmitry Monakhov return 0; 162656c50f11SDmitry Monakhov break; 1627ac27a0ecSDave Kleikamp case Opt_grpjquota: 162856c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1629ac27a0ecSDave Kleikamp return 0; 1630ac27a0ecSDave Kleikamp break; 1631ac27a0ecSDave Kleikamp case Opt_offusrjquota: 163256c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1633ac27a0ecSDave Kleikamp return 0; 1634ac27a0ecSDave Kleikamp break; 163556c50f11SDmitry Monakhov case Opt_offgrpjquota: 163656c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 163756c50f11SDmitry Monakhov return 0; 163856c50f11SDmitry Monakhov break; 163956c50f11SDmitry Monakhov 1640ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1641dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1642dfc5d03fSJan Kara goto set_qf_format; 1643ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1644dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 16455a20bdfcSJan Kara goto set_qf_format; 16465a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 16475a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1648dfc5d03fSJan Kara set_qf_format: 164917bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1650dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1651b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1652dfc5d03fSJan Kara "journaled quota options when " 1653b31e1552SEric Sandeen "quota turned on"); 1654dfc5d03fSJan Kara return 0; 1655dfc5d03fSJan Kara } 1656dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1657ac27a0ecSDave Kleikamp break; 1658ac27a0ecSDave Kleikamp case Opt_quota: 1659ac27a0ecSDave Kleikamp case Opt_usrquota: 1660fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1661fd8c37ecSTheodore Ts'o set_opt(sb, USRQUOTA); 1662ac27a0ecSDave Kleikamp break; 1663ac27a0ecSDave Kleikamp case Opt_grpquota: 1664fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1665fd8c37ecSTheodore Ts'o set_opt(sb, GRPQUOTA); 1666ac27a0ecSDave Kleikamp break; 1667ac27a0ecSDave Kleikamp case Opt_noquota: 166817bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1669b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1670b31e1552SEric Sandeen "options when quota turned on"); 1671ac27a0ecSDave Kleikamp return 0; 1672ac27a0ecSDave Kleikamp } 1673fd8c37ecSTheodore Ts'o clear_opt(sb, QUOTA); 1674fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1675fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1676ac27a0ecSDave Kleikamp break; 1677ac27a0ecSDave Kleikamp #else 1678ac27a0ecSDave Kleikamp case Opt_quota: 1679ac27a0ecSDave Kleikamp case Opt_usrquota: 1680ac27a0ecSDave Kleikamp case Opt_grpquota: 1681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1682b31e1552SEric Sandeen "quota options not supported"); 1683cd59e7b9SJan Kara break; 1684ac27a0ecSDave Kleikamp case Opt_usrjquota: 1685ac27a0ecSDave Kleikamp case Opt_grpjquota: 1686ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1687ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1688ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1689ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 16905a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1691b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1692b31e1552SEric Sandeen "journaled quota options not supported"); 1693ac27a0ecSDave Kleikamp break; 1694ac27a0ecSDave Kleikamp case Opt_noquota: 1695ac27a0ecSDave Kleikamp break; 1696ac27a0ecSDave Kleikamp #endif 1697ac27a0ecSDave Kleikamp case Opt_abort: 16984ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1699ac27a0ecSDave Kleikamp break; 170006705bffSTheodore Ts'o case Opt_nobarrier: 1701fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 170206705bffSTheodore Ts'o break; 1703ac27a0ecSDave Kleikamp case Opt_barrier: 170415121c18SEric Sandeen if (args[0].from) { 170515121c18SEric Sandeen if (match_int(&args[0], &option)) 170615121c18SEric Sandeen return 0; 170715121c18SEric Sandeen } else 170815121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1709ac27a0ecSDave Kleikamp if (option) 1710fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 1711ac27a0ecSDave Kleikamp else 1712fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 1713ac27a0ecSDave Kleikamp break; 1714ac27a0ecSDave Kleikamp case Opt_ignore: 1715ac27a0ecSDave Kleikamp break; 1716ac27a0ecSDave Kleikamp case Opt_resize: 1717ac27a0ecSDave Kleikamp if (!is_remount) { 1718b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1719b31e1552SEric Sandeen "resize option only available " 1720b31e1552SEric Sandeen "for remount"); 1721ac27a0ecSDave Kleikamp return 0; 1722ac27a0ecSDave Kleikamp } 1723ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1724ac27a0ecSDave Kleikamp return 0; 1725ac27a0ecSDave Kleikamp *n_blocks_count = option; 1726ac27a0ecSDave Kleikamp break; 1727ac27a0ecSDave Kleikamp case Opt_nobh: 1728206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1729206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1730ac27a0ecSDave Kleikamp break; 1731ac27a0ecSDave Kleikamp case Opt_bh: 1732206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1733206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1734ac27a0ecSDave Kleikamp break; 173525ec56b5SJean Noel Cordenner case Opt_i_version: 1736fd8c37ecSTheodore Ts'o set_opt(sb, I_VERSION); 173725ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 173825ec56b5SJean Noel Cordenner break; 1739dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1740fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 1741dd919b98SAneesh Kumar K.V break; 17421449032bSTheodore Ts'o case Opt_mblk_io_submit: 1743fd8c37ecSTheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 17441449032bSTheodore Ts'o break; 17451449032bSTheodore Ts'o case Opt_nomblk_io_submit: 1746fd8c37ecSTheodore Ts'o clear_opt(sb, MBLK_IO_SUBMIT); 17471449032bSTheodore Ts'o break; 1748c9de560dSAlex Tomas case Opt_stripe: 1749c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1750c9de560dSAlex Tomas return 0; 1751c9de560dSAlex Tomas if (option < 0) 1752c9de560dSAlex Tomas return 0; 1753c9de560dSAlex Tomas sbi->s_stripe = option; 1754c9de560dSAlex Tomas break; 175564769240SAlex Tomas case Opt_delalloc: 1756fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 175764769240SAlex Tomas break; 17586fd058f7STheodore Ts'o case Opt_block_validity: 1759fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 17606fd058f7STheodore Ts'o break; 17616fd058f7STheodore Ts'o case Opt_noblock_validity: 1762fd8c37ecSTheodore Ts'o clear_opt(sb, BLOCK_VALIDITY); 17636fd058f7STheodore Ts'o break; 1764240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1765240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1766240799cdSTheodore Ts'o return 0; 1767240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1768240799cdSTheodore Ts'o return 0; 1769f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1770b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1771b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1772b31e1552SEric Sandeen " must be a power of 2"); 17733197ebdbSTheodore Ts'o return 0; 17743197ebdbSTheodore Ts'o } 1775240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1776240799cdSTheodore Ts'o break; 1777b3881f74STheodore Ts'o case Opt_journal_ioprio: 1778b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1779b3881f74STheodore Ts'o return 0; 1780b3881f74STheodore Ts'o if (option < 0 || option > 7) 1781b3881f74STheodore Ts'o break; 1782b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1783b3881f74STheodore Ts'o option); 1784b3881f74STheodore Ts'o break; 178506705bffSTheodore Ts'o case Opt_noauto_da_alloc: 1786fd8c37ecSTheodore Ts'o set_opt(sb, NO_AUTO_DA_ALLOC); 178706705bffSTheodore Ts'o break; 1788afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 178915121c18SEric Sandeen if (args[0].from) { 179015121c18SEric Sandeen if (match_int(&args[0], &option)) 179115121c18SEric Sandeen return 0; 179215121c18SEric Sandeen } else 179315121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1794afd4672dSTheodore Ts'o if (option) 1795fd8c37ecSTheodore Ts'o clear_opt(sb, NO_AUTO_DA_ALLOC); 1796afd4672dSTheodore Ts'o else 1797fd8c37ecSTheodore Ts'o set_opt(sb,NO_AUTO_DA_ALLOC); 1798afd4672dSTheodore Ts'o break; 17995328e635SEric Sandeen case Opt_discard: 1800fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 18015328e635SEric Sandeen break; 18025328e635SEric Sandeen case Opt_nodiscard: 1803fd8c37ecSTheodore Ts'o clear_opt(sb, DISCARD); 18045328e635SEric Sandeen break; 1805744692dcSJiaying Zhang case Opt_dioread_nolock: 1806fd8c37ecSTheodore Ts'o set_opt(sb, DIOREAD_NOLOCK); 1807744692dcSJiaying Zhang break; 1808744692dcSJiaying Zhang case Opt_dioread_lock: 1809fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 1810744692dcSJiaying Zhang break; 1811bfff6873SLukas Czerner case Opt_init_inode_table: 1812fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 1813bfff6873SLukas Czerner if (args[0].from) { 1814bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1815bfff6873SLukas Czerner return 0; 1816bfff6873SLukas Czerner } else 1817bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1818bfff6873SLukas Czerner if (option < 0) 1819bfff6873SLukas Czerner return 0; 1820bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1821bfff6873SLukas Czerner break; 1822bfff6873SLukas Czerner case Opt_noinit_inode_table: 1823fd8c37ecSTheodore Ts'o clear_opt(sb, INIT_INODE_TABLE); 1824bfff6873SLukas Czerner break; 1825ac27a0ecSDave Kleikamp default: 1826b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1827b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1828b31e1552SEric Sandeen "or missing value", p); 1829ac27a0ecSDave Kleikamp return 0; 1830ac27a0ecSDave Kleikamp } 1831ac27a0ecSDave Kleikamp } 1832ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1833ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1834482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1835fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1836ac27a0ecSDave Kleikamp 1837482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1838fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1839ac27a0ecSDave Kleikamp 184056c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1841b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1842b31e1552SEric Sandeen "format mixing"); 1843ac27a0ecSDave Kleikamp return 0; 1844ac27a0ecSDave Kleikamp } 1845ac27a0ecSDave Kleikamp 1846ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1847b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1848b31e1552SEric Sandeen "not specified"); 1849ac27a0ecSDave Kleikamp return 0; 1850ac27a0ecSDave Kleikamp } 1851ac27a0ecSDave Kleikamp } else { 1852ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 18542c8be6b2SJan Kara "specified with no journaling " 1855b31e1552SEric Sandeen "enabled"); 1856ac27a0ecSDave Kleikamp return 0; 1857ac27a0ecSDave Kleikamp } 1858ac27a0ecSDave Kleikamp } 1859ac27a0ecSDave Kleikamp #endif 1860ac27a0ecSDave Kleikamp return 1; 1861ac27a0ecSDave Kleikamp } 1862ac27a0ecSDave Kleikamp 1863617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1864ac27a0ecSDave Kleikamp int read_only) 1865ac27a0ecSDave Kleikamp { 1866617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1867ac27a0ecSDave Kleikamp int res = 0; 1868ac27a0ecSDave Kleikamp 1869617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1870b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1871b31e1552SEric Sandeen "forcing read-only mode"); 1872ac27a0ecSDave Kleikamp res = MS_RDONLY; 1873ac27a0ecSDave Kleikamp } 1874ac27a0ecSDave Kleikamp if (read_only) 1875ac27a0ecSDave Kleikamp return res; 1876617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1877b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1878b31e1552SEric Sandeen "running e2fsck is recommended"); 1879617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1880b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1881b31e1552SEric Sandeen "warning: mounting fs with errors, " 1882b31e1552SEric Sandeen "running e2fsck is recommended"); 1883ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1884ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1885ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1886b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1887b31e1552SEric Sandeen "warning: maximal mount count reached, " 1888b31e1552SEric Sandeen "running e2fsck is recommended"); 1889ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1890ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1891ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1892b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1893b31e1552SEric Sandeen "warning: checktime reached, " 1894b31e1552SEric Sandeen "running e2fsck is recommended"); 18950390131bSFrank Mayhar if (!sbi->s_journal) 1896216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1897ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1898617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1899e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1900ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1901617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19020390131bSFrank Mayhar if (sbi->s_journal) 1903617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1904ac27a0ecSDave Kleikamp 1905e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1906ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1907a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1908a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1909ac27a0ecSDave Kleikamp sb->s_blocksize, 1910ac27a0ecSDave Kleikamp sbi->s_groups_count, 1911617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1912617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1913a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1914ac27a0ecSDave Kleikamp 1915ac27a0ecSDave Kleikamp return res; 1916ac27a0ecSDave Kleikamp } 1917ac27a0ecSDave Kleikamp 1918772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1919772cb7c8SJose R. Santos { 1920772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1921772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1922772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1923772cb7c8SJose R. Santos ext4_group_t flex_group; 1924772cb7c8SJose R. Santos int groups_per_flex = 0; 1925c5ca7c76STheodore Ts'o size_t size; 1926772cb7c8SJose R. Santos int i; 1927772cb7c8SJose R. Santos 1928503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1929503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1930503358aeSTheodore Ts'o 1931503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1932772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1933772cb7c8SJose R. Santos return 1; 1934772cb7c8SJose R. Santos } 1935772cb7c8SJose R. Santos 1936c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1937c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1938d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1939d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1940c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1941c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1942c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 194394de56abSJoe Perches sbi->s_flex_groups = vzalloc(size); 1944772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 194594de56abSJoe Perches ext4_msg(sb, KERN_ERR, 194694de56abSJoe Perches "not enough memory for %u flex groups", 194794de56abSJoe Perches flex_group_count); 1948772cb7c8SJose R. Santos goto failed; 1949772cb7c8SJose R. Santos } 195094de56abSJoe Perches } 1951772cb7c8SJose R. Santos 1952772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 195388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1954772cb7c8SJose R. Santos 1955772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19567ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19577ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 19587ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 19597ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 19607ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19617ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1962772cb7c8SJose R. Santos } 1963772cb7c8SJose R. Santos 1964772cb7c8SJose R. Santos return 1; 1965772cb7c8SJose R. Santos failed: 1966772cb7c8SJose R. Santos return 0; 1967772cb7c8SJose R. Santos } 1968772cb7c8SJose R. Santos 1969717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1970717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1971717d50e4SAndreas Dilger { 1972717d50e4SAndreas Dilger __u16 crc = 0; 1973717d50e4SAndreas Dilger 1974717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1975717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1976717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1977717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1978717d50e4SAndreas Dilger 1979717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1980717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1981717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1982717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1983717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1984717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1985717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1986717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1987717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1988717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1989717d50e4SAndreas Dilger offset); 1990717d50e4SAndreas Dilger } 1991717d50e4SAndreas Dilger 1992717d50e4SAndreas Dilger return cpu_to_le16(crc); 1993717d50e4SAndreas Dilger } 1994717d50e4SAndreas Dilger 1995717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1996717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1997717d50e4SAndreas Dilger { 1998717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1999717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 2000717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 2001717d50e4SAndreas Dilger return 0; 2002717d50e4SAndreas Dilger 2003717d50e4SAndreas Dilger return 1; 2004717d50e4SAndreas Dilger } 2005717d50e4SAndreas Dilger 2006ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2007bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2008bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2009ac27a0ecSDave Kleikamp { 2010617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2011617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2012617ba13bSMingming Cao ext4_fsblk_t last_block; 2013bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2014bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2015bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2016ce421581SJose R. Santos int flexbg_flag = 0; 2017bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2018ac27a0ecSDave Kleikamp 2019ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2020ce421581SJose R. Santos flexbg_flag = 1; 2021ce421581SJose R. Santos 2022617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2023ac27a0ecSDave Kleikamp 2024197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2025197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2026197cd65aSAkinobu Mita 2027ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2028bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2029ac27a0ecSDave Kleikamp else 2030ac27a0ecSDave Kleikamp last_block = first_block + 2031617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2032ac27a0ecSDave Kleikamp 2033bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2034bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2035bfff6873SLukas Czerner grp = i; 2036bfff6873SLukas Czerner 20378fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20382b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2039b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2040a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2041b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2042ac27a0ecSDave Kleikamp return 0; 2043ac27a0ecSDave Kleikamp } 20448fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20452b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2046b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2047a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2048b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2049ac27a0ecSDave Kleikamp return 0; 2050ac27a0ecSDave Kleikamp } 20518fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2052bd81d8eeSLaurent Vivier if (inode_table < first_block || 20532b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2054b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2055a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2056b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2057ac27a0ecSDave Kleikamp return 0; 2058ac27a0ecSDave Kleikamp } 2059955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2060717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2061b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2062b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2063fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2064fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20657ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2066955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2067717d50e4SAndreas Dilger return 0; 2068717d50e4SAndreas Dilger } 20697ee1ec4cSLi Zefan } 2070955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2071ce421581SJose R. Santos if (!flexbg_flag) 2072617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2073ac27a0ecSDave Kleikamp } 2074bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2075bfff6873SLukas Czerner *first_not_zeroed = grp; 2076ac27a0ecSDave Kleikamp 2077bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 2078617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2079ac27a0ecSDave Kleikamp return 1; 2080ac27a0ecSDave Kleikamp } 2081ac27a0ecSDave Kleikamp 2082617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2083ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2084ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2085ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2086ac27a0ecSDave Kleikamp * 2087ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2088ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2089ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2090ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2091ac27a0ecSDave Kleikamp * 2092ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2093ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2094ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2095617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2096ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2097ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2098ac27a0ecSDave Kleikamp */ 2099617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2100617ba13bSMingming Cao struct ext4_super_block *es) 2101ac27a0ecSDave Kleikamp { 2102ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2103ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2104ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2105ac27a0ecSDave Kleikamp int i; 2106ac27a0ecSDave Kleikamp #endif 2107ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2108ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2109ac27a0ecSDave Kleikamp return; 2110ac27a0ecSDave Kleikamp } 2111ac27a0ecSDave Kleikamp 2112a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2113b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2114b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2115a8f48a95SEric Sandeen return; 2116a8f48a95SEric Sandeen } 2117a8f48a95SEric Sandeen 2118617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2119ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2120ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2121ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2122ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2123ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2124ac27a0ecSDave Kleikamp return; 2125ac27a0ecSDave Kleikamp } 2126ac27a0ecSDave Kleikamp 2127ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2128b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2129ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2130ac27a0ecSDave Kleikamp } 2131ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2132ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2133ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2134ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2135ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2136617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2137617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2138ac27a0ecSDave Kleikamp if (ret < 0) 2139b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2140b31e1552SEric Sandeen "Cannot turn on journaled " 2141b31e1552SEric Sandeen "quota: error %d", ret); 2142ac27a0ecSDave Kleikamp } 2143ac27a0ecSDave Kleikamp } 2144ac27a0ecSDave Kleikamp #endif 2145ac27a0ecSDave Kleikamp 2146ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2147ac27a0ecSDave Kleikamp struct inode *inode; 2148ac27a0ecSDave Kleikamp 214997bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 215097bd42b9SJosef Bacik if (IS_ERR(inode)) { 2151ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2152ac27a0ecSDave Kleikamp break; 2153ac27a0ecSDave Kleikamp } 2154ac27a0ecSDave Kleikamp 2155617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2156871a2931SChristoph Hellwig dquot_initialize(inode); 2157ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2158b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2159b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 216046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2161e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2162ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2163617ba13bSMingming Cao ext4_truncate(inode); 2164ac27a0ecSDave Kleikamp nr_truncates++; 2165ac27a0ecSDave Kleikamp } else { 2166b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2167b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 216846e665e9SHarvey Harrison __func__, inode->i_ino); 2169ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2170ac27a0ecSDave Kleikamp inode->i_ino); 2171ac27a0ecSDave Kleikamp nr_orphans++; 2172ac27a0ecSDave Kleikamp } 2173ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2174ac27a0ecSDave Kleikamp } 2175ac27a0ecSDave Kleikamp 2176ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2177ac27a0ecSDave Kleikamp 2178ac27a0ecSDave Kleikamp if (nr_orphans) 2179b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2180b31e1552SEric Sandeen PLURAL(nr_orphans)); 2181ac27a0ecSDave Kleikamp if (nr_truncates) 2182b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2183b31e1552SEric Sandeen PLURAL(nr_truncates)); 2184ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2185ac27a0ecSDave Kleikamp /* Turn quotas off */ 2186ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2187ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2188287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2189ac27a0ecSDave Kleikamp } 2190ac27a0ecSDave Kleikamp #endif 2191ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2192ac27a0ecSDave Kleikamp } 21930b8e58a1SAndreas Dilger 2194cd2291a4SEric Sandeen /* 2195cd2291a4SEric Sandeen * Maximal extent format file size. 2196cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2197cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2198cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2199cd2291a4SEric Sandeen * so that won't be a limiting factor. 2200cd2291a4SEric Sandeen * 2201cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2202cd2291a4SEric Sandeen */ 2203f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2204cd2291a4SEric Sandeen { 2205cd2291a4SEric Sandeen loff_t res; 2206cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2207cd2291a4SEric Sandeen 2208cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2209f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2210cd2291a4SEric Sandeen /* 221190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2212cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2213cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2214cd2291a4SEric Sandeen */ 2215cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2216cd2291a4SEric Sandeen 2217cd2291a4SEric Sandeen /* total blocks in file system block size */ 2218cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2219cd2291a4SEric Sandeen upper_limit <<= blkbits; 2220cd2291a4SEric Sandeen } 2221cd2291a4SEric Sandeen 2222cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2223cd2291a4SEric Sandeen res = 1LL << 32; 2224cd2291a4SEric Sandeen res <<= blkbits; 2225cd2291a4SEric Sandeen res -= 1; 2226cd2291a4SEric Sandeen 2227cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2228cd2291a4SEric Sandeen if (res > upper_limit) 2229cd2291a4SEric Sandeen res = upper_limit; 2230cd2291a4SEric Sandeen 2231cd2291a4SEric Sandeen return res; 2232cd2291a4SEric Sandeen } 2233ac27a0ecSDave Kleikamp 2234ac27a0ecSDave Kleikamp /* 2235cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22360fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22370fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2238ac27a0ecSDave Kleikamp */ 2239f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2240ac27a0ecSDave Kleikamp { 2241617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22420fc1b451SAneesh Kumar K.V int meta_blocks; 22430fc1b451SAneesh Kumar K.V loff_t upper_limit; 22440b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22450b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22460b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22470b8e58a1SAndreas Dilger * 22480b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22490b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22500fc1b451SAneesh Kumar K.V */ 22510fc1b451SAneesh Kumar K.V 2252f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22530fc1b451SAneesh Kumar K.V /* 225490c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22550b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22560b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 22570fc1b451SAneesh Kumar K.V */ 22580fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 22590fc1b451SAneesh Kumar K.V 22600fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 22610fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 22620fc1b451SAneesh Kumar K.V 22630fc1b451SAneesh Kumar K.V } else { 22648180a562SAneesh Kumar K.V /* 22658180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 22668180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 22678180a562SAneesh Kumar K.V * represent total number of blocks in 22688180a562SAneesh Kumar K.V * file system block size 22698180a562SAneesh Kumar K.V */ 22700fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 22710fc1b451SAneesh Kumar K.V 22720fc1b451SAneesh Kumar K.V } 22730fc1b451SAneesh Kumar K.V 22740fc1b451SAneesh Kumar K.V /* indirect blocks */ 22750fc1b451SAneesh Kumar K.V meta_blocks = 1; 22760fc1b451SAneesh Kumar K.V /* double indirect blocks */ 22770fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 22780fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 22790fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 22800fc1b451SAneesh Kumar K.V 22810fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 22820fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2283ac27a0ecSDave Kleikamp 2284ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2285ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2286ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2287ac27a0ecSDave Kleikamp res <<= bits; 2288ac27a0ecSDave Kleikamp if (res > upper_limit) 2289ac27a0ecSDave Kleikamp res = upper_limit; 22900fc1b451SAneesh Kumar K.V 22910fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 22920fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 22930fc1b451SAneesh Kumar K.V 2294ac27a0ecSDave Kleikamp return res; 2295ac27a0ecSDave Kleikamp } 2296ac27a0ecSDave Kleikamp 2297617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 229870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2299ac27a0ecSDave Kleikamp { 2300617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2301fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2302ac27a0ecSDave Kleikamp int has_super = 0; 2303ac27a0ecSDave Kleikamp 2304ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2305ac27a0ecSDave Kleikamp 2306617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2307ac27a0ecSDave Kleikamp nr < first_meta_bg) 230870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2309ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2310617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2311ac27a0ecSDave Kleikamp has_super = 1; 23120b8e58a1SAndreas Dilger 2313617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2314ac27a0ecSDave Kleikamp } 2315ac27a0ecSDave Kleikamp 2316c9de560dSAlex Tomas /** 2317c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2318c9de560dSAlex Tomas * @sbi: In memory super block info 2319c9de560dSAlex Tomas * 2320c9de560dSAlex Tomas * If we have specified it via mount option, then 2321c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2322c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2323c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2324c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2325c9de560dSAlex Tomas * 2326c9de560dSAlex Tomas */ 2327c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2328c9de560dSAlex Tomas { 2329c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2330c9de560dSAlex Tomas unsigned long stripe_width = 2331c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2332c9de560dSAlex Tomas 2333c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2334c9de560dSAlex Tomas return sbi->s_stripe; 2335c9de560dSAlex Tomas 2336c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2337c9de560dSAlex Tomas return stripe_width; 2338c9de560dSAlex Tomas 2339c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2340c9de560dSAlex Tomas return stride; 2341c9de560dSAlex Tomas 2342c9de560dSAlex Tomas return 0; 2343c9de560dSAlex Tomas } 2344ac27a0ecSDave Kleikamp 23453197ebdbSTheodore Ts'o /* sysfs supprt */ 23463197ebdbSTheodore Ts'o 23473197ebdbSTheodore Ts'o struct ext4_attr { 23483197ebdbSTheodore Ts'o struct attribute attr; 23493197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23503197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23513197ebdbSTheodore Ts'o const char *, size_t); 23523197ebdbSTheodore Ts'o int offset; 23533197ebdbSTheodore Ts'o }; 23543197ebdbSTheodore Ts'o 23553197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23563197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 23573197ebdbSTheodore Ts'o { 23583197ebdbSTheodore Ts'o char *endp; 23593197ebdbSTheodore Ts'o 2360e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2361e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 23623197ebdbSTheodore Ts'o if (*endp || *value > max) 23633197ebdbSTheodore Ts'o return -EINVAL; 23643197ebdbSTheodore Ts'o 23653197ebdbSTheodore Ts'o return 0; 23663197ebdbSTheodore Ts'o } 23673197ebdbSTheodore Ts'o 23683197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 23693197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23703197ebdbSTheodore Ts'o char *buf) 23713197ebdbSTheodore Ts'o { 23723197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 23733197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 23743197ebdbSTheodore Ts'o } 23753197ebdbSTheodore Ts'o 23763197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 23773197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23783197ebdbSTheodore Ts'o { 23793197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23803197ebdbSTheodore Ts'o 2381f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2382f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23833197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 23843197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 23853197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 23863197ebdbSTheodore Ts'o } 23873197ebdbSTheodore Ts'o 23883197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 23893197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23903197ebdbSTheodore Ts'o { 23913197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23923197ebdbSTheodore Ts'o 2393f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2394f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23953197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2396a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 23973197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2398a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 23993197ebdbSTheodore Ts'o } 24003197ebdbSTheodore Ts'o 24013197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24023197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24033197ebdbSTheodore Ts'o const char *buf, size_t count) 24043197ebdbSTheodore Ts'o { 24053197ebdbSTheodore Ts'o unsigned long t; 24063197ebdbSTheodore Ts'o 24073197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24083197ebdbSTheodore Ts'o return -EINVAL; 24093197ebdbSTheodore Ts'o 2410f7c43950STheodore Ts'o if (!is_power_of_2(t)) 24113197ebdbSTheodore Ts'o return -EINVAL; 24123197ebdbSTheodore Ts'o 24133197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24143197ebdbSTheodore Ts'o return count; 24153197ebdbSTheodore Ts'o } 24163197ebdbSTheodore Ts'o 24173197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24183197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24193197ebdbSTheodore Ts'o { 24203197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24213197ebdbSTheodore Ts'o 24223197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24233197ebdbSTheodore Ts'o } 24243197ebdbSTheodore Ts'o 24253197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24263197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24273197ebdbSTheodore Ts'o const char *buf, size_t count) 24283197ebdbSTheodore Ts'o { 24293197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24303197ebdbSTheodore Ts'o unsigned long t; 24313197ebdbSTheodore Ts'o 24323197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24333197ebdbSTheodore Ts'o return -EINVAL; 24343197ebdbSTheodore Ts'o *ui = t; 24353197ebdbSTheodore Ts'o return count; 24363197ebdbSTheodore Ts'o } 24373197ebdbSTheodore Ts'o 24383197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24393197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24403197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24413197ebdbSTheodore Ts'o .show = _show, \ 24423197ebdbSTheodore Ts'o .store = _store, \ 24433197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24443197ebdbSTheodore Ts'o } 24453197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 24463197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 24473197ebdbSTheodore Ts'o 2448857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 24493197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 24503197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 24513197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 24523197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 24533197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 24543197ebdbSTheodore Ts'o 24553197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 24563197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 24573197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 24583197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 24593197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 246011013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 24613197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 24623197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 24633197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 24643197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 24653197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 24663197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 246755138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 24683197ebdbSTheodore Ts'o 24693197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 24703197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 24713197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 24723197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 24733197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 247411013911SAndreas Dilger ATTR_LIST(inode_goal), 24753197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 24763197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 24773197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 24783197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 24793197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 24803197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 248155138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 24823197ebdbSTheodore Ts'o NULL, 24833197ebdbSTheodore Ts'o }; 24843197ebdbSTheodore Ts'o 2485857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2486857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 248727ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2488857ac889SLukas Czerner 2489857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2490857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 249127ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2492857ac889SLukas Czerner NULL, 2493857ac889SLukas Czerner }; 2494857ac889SLukas Czerner 24953197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 24963197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 24973197ebdbSTheodore Ts'o { 24983197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24993197ebdbSTheodore Ts'o s_kobj); 25003197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25013197ebdbSTheodore Ts'o 25023197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25033197ebdbSTheodore Ts'o } 25043197ebdbSTheodore Ts'o 25053197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25063197ebdbSTheodore Ts'o struct attribute *attr, 25073197ebdbSTheodore Ts'o const char *buf, size_t len) 25083197ebdbSTheodore Ts'o { 25093197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25103197ebdbSTheodore Ts'o s_kobj); 25113197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25123197ebdbSTheodore Ts'o 25133197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25143197ebdbSTheodore Ts'o } 25153197ebdbSTheodore Ts'o 25163197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25173197ebdbSTheodore Ts'o { 25183197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25193197ebdbSTheodore Ts'o s_kobj); 25203197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25213197ebdbSTheodore Ts'o } 25223197ebdbSTheodore Ts'o 252352cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25243197ebdbSTheodore Ts'o .show = ext4_attr_show, 25253197ebdbSTheodore Ts'o .store = ext4_attr_store, 25263197ebdbSTheodore Ts'o }; 25273197ebdbSTheodore Ts'o 25283197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 25293197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25303197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25313197ebdbSTheodore Ts'o .release = ext4_sb_release, 25323197ebdbSTheodore Ts'o }; 25333197ebdbSTheodore Ts'o 2534857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2535857ac889SLukas Czerner { 2536857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2537857ac889SLukas Czerner } 2538857ac889SLukas Czerner 2539857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2540857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2541857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2542857ac889SLukas Czerner .release = ext4_feat_release, 2543857ac889SLukas Czerner }; 2544857ac889SLukas Czerner 2545a13fb1a4SEric Sandeen /* 2546a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2547a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2548a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2549a13fb1a4SEric Sandeen * 0 if it cannot be. 2550a13fb1a4SEric Sandeen */ 2551a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2552a13fb1a4SEric Sandeen { 2553a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2554a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2555a13fb1a4SEric Sandeen "Couldn't mount because of " 2556a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2557a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2558a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2559a13fb1a4SEric Sandeen return 0; 2560a13fb1a4SEric Sandeen } 2561a13fb1a4SEric Sandeen 2562a13fb1a4SEric Sandeen if (readonly) 2563a13fb1a4SEric Sandeen return 1; 2564a13fb1a4SEric Sandeen 2565a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2566a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2567a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2568a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2569a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2570a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2571a13fb1a4SEric Sandeen return 0; 2572a13fb1a4SEric Sandeen } 2573a13fb1a4SEric Sandeen /* 2574a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2575a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2576a13fb1a4SEric Sandeen */ 2577a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2578a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2579a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2580a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2581a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2582a13fb1a4SEric Sandeen return 0; 2583a13fb1a4SEric Sandeen } 2584a13fb1a4SEric Sandeen } 2585a13fb1a4SEric Sandeen return 1; 2586a13fb1a4SEric Sandeen } 2587a13fb1a4SEric Sandeen 258866e61a9eSTheodore Ts'o /* 258966e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 259066e61a9eSTheodore Ts'o * on the file system 259166e61a9eSTheodore Ts'o */ 259266e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 259366e61a9eSTheodore Ts'o { 259466e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 259566e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 259666e61a9eSTheodore Ts'o struct ext4_super_block *es; 259766e61a9eSTheodore Ts'o 259866e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 259966e61a9eSTheodore Ts'o es = sbi->s_es; 260066e61a9eSTheodore Ts'o 260166e61a9eSTheodore Ts'o if (es->s_error_count) 260266e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 260366e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 260466e61a9eSTheodore Ts'o if (es->s_first_error_time) { 260566e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 260666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 260766e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 260866e61a9eSTheodore Ts'o es->s_first_error_func, 260966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 261066e61a9eSTheodore Ts'o if (es->s_first_error_ino) 261166e61a9eSTheodore Ts'o printk(": inode %u", 261266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 261366e61a9eSTheodore Ts'o if (es->s_first_error_block) 261466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 261566e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 261666e61a9eSTheodore Ts'o printk("\n"); 261766e61a9eSTheodore Ts'o } 261866e61a9eSTheodore Ts'o if (es->s_last_error_time) { 261966e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 262066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 262166e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 262266e61a9eSTheodore Ts'o es->s_last_error_func, 262366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 262466e61a9eSTheodore Ts'o if (es->s_last_error_ino) 262566e61a9eSTheodore Ts'o printk(": inode %u", 262666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 262766e61a9eSTheodore Ts'o if (es->s_last_error_block) 262866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 262966e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 263066e61a9eSTheodore Ts'o printk("\n"); 263166e61a9eSTheodore Ts'o } 263266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 263366e61a9eSTheodore Ts'o } 263466e61a9eSTheodore Ts'o 2635bfff6873SLukas Czerner static void ext4_lazyinode_timeout(unsigned long data) 2636bfff6873SLukas Czerner { 2637bfff6873SLukas Czerner struct task_struct *p = (struct task_struct *)data; 2638bfff6873SLukas Czerner wake_up_process(p); 2639bfff6873SLukas Czerner } 2640bfff6873SLukas Czerner 2641bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2642bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2643bfff6873SLukas Czerner { 2644bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2645bfff6873SLukas Czerner ext4_group_t group, ngroups; 2646bfff6873SLukas Czerner struct super_block *sb; 2647bfff6873SLukas Czerner unsigned long timeout = 0; 2648bfff6873SLukas Czerner int ret = 0; 2649bfff6873SLukas Czerner 2650bfff6873SLukas Czerner sb = elr->lr_super; 2651bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2652bfff6873SLukas Czerner 2653bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2654bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2655bfff6873SLukas Czerner if (!gdp) { 2656bfff6873SLukas Czerner ret = 1; 2657bfff6873SLukas Czerner break; 2658bfff6873SLukas Czerner } 2659bfff6873SLukas Czerner 2660bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2661bfff6873SLukas Czerner break; 2662bfff6873SLukas Czerner } 2663bfff6873SLukas Czerner 2664bfff6873SLukas Czerner if (group == ngroups) 2665bfff6873SLukas Czerner ret = 1; 2666bfff6873SLukas Czerner 2667bfff6873SLukas Czerner if (!ret) { 2668bfff6873SLukas Czerner timeout = jiffies; 2669bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2670bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2671bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 2672bfff6873SLukas Czerner timeout = jiffies - timeout; 2673bfff6873SLukas Czerner if (elr->lr_sbi->s_li_wait_mult) 2674bfff6873SLukas Czerner timeout *= elr->lr_sbi->s_li_wait_mult; 2675bfff6873SLukas Czerner else 2676bfff6873SLukas Czerner timeout *= 20; 2677bfff6873SLukas Czerner elr->lr_timeout = timeout; 2678bfff6873SLukas Czerner } 2679bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2680bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2681bfff6873SLukas Czerner } 2682bfff6873SLukas Czerner 2683bfff6873SLukas Czerner return ret; 2684bfff6873SLukas Czerner } 2685bfff6873SLukas Czerner 2686bfff6873SLukas Czerner /* 2687bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 2688bfff6873SLukas Czerner * request tructure. Should be called with li_list_mtx held 2689bfff6873SLukas Czerner */ 2690bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2691bfff6873SLukas Czerner { 2692bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2693bfff6873SLukas Czerner 2694bfff6873SLukas Czerner if (!elr) 2695bfff6873SLukas Czerner return; 2696bfff6873SLukas Czerner 2697bfff6873SLukas Czerner sbi = elr->lr_sbi; 2698bfff6873SLukas Czerner 2699bfff6873SLukas Czerner list_del(&elr->lr_request); 2700bfff6873SLukas Czerner sbi->s_li_request = NULL; 2701bfff6873SLukas Czerner kfree(elr); 2702bfff6873SLukas Czerner } 2703bfff6873SLukas Czerner 2704bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2705bfff6873SLukas Czerner { 2706bfff6873SLukas Czerner struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; 2707bfff6873SLukas Czerner 2708bfff6873SLukas Czerner if (!ext4_li_info) 2709bfff6873SLukas Czerner return; 2710bfff6873SLukas Czerner 2711bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2712bfff6873SLukas Czerner ext4_remove_li_request(elr); 2713bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2714bfff6873SLukas Czerner } 2715bfff6873SLukas Czerner 2716bfff6873SLukas Czerner /* 2717bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2718bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2719bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2720bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2721bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2722bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2723bfff6873SLukas Czerner * next waking time and put itself into sleep. 2724bfff6873SLukas Czerner */ 2725bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2726bfff6873SLukas Czerner { 2727bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2728bfff6873SLukas Czerner struct list_head *pos, *n; 2729bfff6873SLukas Czerner struct ext4_li_request *elr; 2730bfff6873SLukas Czerner unsigned long next_wakeup; 2731bfff6873SLukas Czerner DEFINE_WAIT(wait); 2732bfff6873SLukas Czerner 2733bfff6873SLukas Czerner BUG_ON(NULL == eli); 2734bfff6873SLukas Czerner 2735bfff6873SLukas Czerner eli->li_timer.data = (unsigned long)current; 2736bfff6873SLukas Czerner eli->li_timer.function = ext4_lazyinode_timeout; 2737bfff6873SLukas Czerner 2738bfff6873SLukas Czerner eli->li_task = current; 2739bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2740bfff6873SLukas Czerner 2741bfff6873SLukas Czerner cont_thread: 2742bfff6873SLukas Czerner while (true) { 2743bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2744bfff6873SLukas Czerner 2745bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2746bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2747bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2748bfff6873SLukas Czerner goto exit_thread; 2749bfff6873SLukas Czerner } 2750bfff6873SLukas Czerner 2751bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2752bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2753bfff6873SLukas Czerner lr_request); 2754bfff6873SLukas Czerner 2755b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2756b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2757b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2758bfff6873SLukas Czerner ext4_remove_li_request(elr); 2759bfff6873SLukas Czerner continue; 2760bfff6873SLukas Czerner } 2761b2c78cd0STheodore Ts'o } 2762bfff6873SLukas Czerner 2763bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2764bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2765bfff6873SLukas Czerner } 2766bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2767bfff6873SLukas Czerner 2768bfff6873SLukas Czerner if (freezing(current)) 2769bfff6873SLukas Czerner refrigerator(); 2770bfff6873SLukas Czerner 2771f4245bd4SLukas Czerner if ((time_after_eq(jiffies, next_wakeup)) || 2772f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2773bfff6873SLukas Czerner cond_resched(); 2774bfff6873SLukas Czerner continue; 2775bfff6873SLukas Czerner } 2776bfff6873SLukas Czerner 2777bfff6873SLukas Czerner eli->li_timer.expires = next_wakeup; 2778bfff6873SLukas Czerner add_timer(&eli->li_timer); 2779bfff6873SLukas Czerner prepare_to_wait(&eli->li_wait_daemon, &wait, 2780bfff6873SLukas Czerner TASK_INTERRUPTIBLE); 2781bfff6873SLukas Czerner if (time_before(jiffies, next_wakeup)) 2782bfff6873SLukas Czerner schedule(); 2783bfff6873SLukas Czerner finish_wait(&eli->li_wait_daemon, &wait); 2784bfff6873SLukas Czerner } 2785bfff6873SLukas Czerner 2786bfff6873SLukas Czerner exit_thread: 2787bfff6873SLukas Czerner /* 2788bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2789bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2790bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2791bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2792bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2793bfff6873SLukas Czerner * new one. 2794bfff6873SLukas Czerner */ 2795bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2796bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2797bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2798bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2799bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2800bfff6873SLukas Czerner goto cont_thread; 2801bfff6873SLukas Czerner } 2802bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2803bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2804bfff6873SLukas Czerner eli->li_task = NULL; 2805bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2806bfff6873SLukas Czerner 2807bfff6873SLukas Czerner kfree(ext4_li_info); 2808bfff6873SLukas Czerner ext4_li_info = NULL; 2809bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2810bfff6873SLukas Czerner 2811bfff6873SLukas Czerner return 0; 2812bfff6873SLukas Czerner } 2813bfff6873SLukas Czerner 2814bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2815bfff6873SLukas Czerner { 2816bfff6873SLukas Czerner struct list_head *pos, *n; 2817bfff6873SLukas Czerner struct ext4_li_request *elr; 2818bfff6873SLukas Czerner 2819bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2820bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2821bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2822bfff6873SLukas Czerner lr_request); 2823bfff6873SLukas Czerner ext4_remove_li_request(elr); 2824bfff6873SLukas Czerner } 2825bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2826bfff6873SLukas Czerner } 2827bfff6873SLukas Czerner 2828bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2829bfff6873SLukas Czerner { 2830bfff6873SLukas Czerner struct task_struct *t; 2831bfff6873SLukas Czerner 2832bfff6873SLukas Czerner t = kthread_run(ext4_lazyinit_thread, ext4_li_info, "ext4lazyinit"); 2833bfff6873SLukas Czerner if (IS_ERR(t)) { 2834bfff6873SLukas Czerner int err = PTR_ERR(t); 2835bfff6873SLukas Czerner ext4_clear_request_list(); 2836bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2837bfff6873SLukas Czerner kfree(ext4_li_info); 2838bfff6873SLukas Czerner ext4_li_info = NULL; 2839bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2840bfff6873SLukas Czerner "initialization thread\n", 2841bfff6873SLukas Czerner err); 2842bfff6873SLukas Czerner return err; 2843bfff6873SLukas Czerner } 2844bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2845bfff6873SLukas Czerner 2846bfff6873SLukas Czerner wait_event(ext4_li_info->li_wait_task, ext4_li_info->li_task != NULL); 2847bfff6873SLukas Czerner return 0; 2848bfff6873SLukas Czerner } 2849bfff6873SLukas Czerner 2850bfff6873SLukas Czerner /* 2851bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2852bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2853bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2854bfff6873SLukas Czerner * groups and return total number of groups. 2855bfff6873SLukas Czerner */ 2856bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2857bfff6873SLukas Czerner { 2858bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2859bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2860bfff6873SLukas Czerner 2861bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2862bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2863bfff6873SLukas Czerner if (!gdp) 2864bfff6873SLukas Czerner continue; 2865bfff6873SLukas Czerner 2866bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2867bfff6873SLukas Czerner break; 2868bfff6873SLukas Czerner } 2869bfff6873SLukas Czerner 2870bfff6873SLukas Czerner return group; 2871bfff6873SLukas Czerner } 2872bfff6873SLukas Czerner 2873bfff6873SLukas Czerner static int ext4_li_info_new(void) 2874bfff6873SLukas Czerner { 2875bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2876bfff6873SLukas Czerner 2877bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2878bfff6873SLukas Czerner if (!eli) 2879bfff6873SLukas Czerner return -ENOMEM; 2880bfff6873SLukas Czerner 2881bfff6873SLukas Czerner eli->li_task = NULL; 2882bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2883bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2884bfff6873SLukas Czerner 2885bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_daemon); 2886bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_task); 2887bfff6873SLukas Czerner init_timer(&eli->li_timer); 2888bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2889bfff6873SLukas Czerner 2890bfff6873SLukas Czerner ext4_li_info = eli; 2891bfff6873SLukas Czerner 2892bfff6873SLukas Czerner return 0; 2893bfff6873SLukas Czerner } 2894bfff6873SLukas Czerner 2895bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2896bfff6873SLukas Czerner ext4_group_t start) 2897bfff6873SLukas Czerner { 2898bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2899bfff6873SLukas Czerner struct ext4_li_request *elr; 2900bfff6873SLukas Czerner unsigned long rnd; 2901bfff6873SLukas Czerner 2902bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2903bfff6873SLukas Czerner if (!elr) 2904bfff6873SLukas Czerner return NULL; 2905bfff6873SLukas Czerner 2906bfff6873SLukas Czerner elr->lr_super = sb; 2907bfff6873SLukas Czerner elr->lr_sbi = sbi; 2908bfff6873SLukas Czerner elr->lr_next_group = start; 2909bfff6873SLukas Czerner 2910bfff6873SLukas Czerner /* 2911bfff6873SLukas Czerner * Randomize first schedule time of the request to 2912bfff6873SLukas Czerner * spread the inode table initialization requests 2913bfff6873SLukas Czerner * better. 2914bfff6873SLukas Czerner */ 2915bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2916bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2917bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2918bfff6873SLukas Czerner 2919bfff6873SLukas Czerner return elr; 2920bfff6873SLukas Czerner } 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2923bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2924bfff6873SLukas Czerner { 2925bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2926bfff6873SLukas Czerner struct ext4_li_request *elr; 2927bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 2928beed5ecbSNicolas Kaiser int ret; 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner if (sbi->s_li_request != NULL) 2931beed5ecbSNicolas Kaiser return 0; 2932bfff6873SLukas Czerner 2933bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2934bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 2935bfff6873SLukas Czerner !test_opt(sb, INIT_INODE_TABLE)) { 2936bfff6873SLukas Czerner sbi->s_li_request = NULL; 2937beed5ecbSNicolas Kaiser return 0; 2938bfff6873SLukas Czerner } 2939bfff6873SLukas Czerner 2940bfff6873SLukas Czerner if (first_not_zeroed == ngroups) { 2941bfff6873SLukas Czerner sbi->s_li_request = NULL; 2942beed5ecbSNicolas Kaiser return 0; 2943bfff6873SLukas Czerner } 2944bfff6873SLukas Czerner 2945bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2946beed5ecbSNicolas Kaiser if (!elr) 2947beed5ecbSNicolas Kaiser return -ENOMEM; 2948bfff6873SLukas Czerner 2949bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2950bfff6873SLukas Czerner 2951bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2952bfff6873SLukas Czerner ret = ext4_li_info_new(); 2953bfff6873SLukas Czerner if (ret) 2954bfff6873SLukas Czerner goto out; 2955bfff6873SLukas Czerner } 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2958bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2959bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2960bfff6873SLukas Czerner 2961bfff6873SLukas Czerner sbi->s_li_request = elr; 2962bfff6873SLukas Czerner 2963bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2964bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2965bfff6873SLukas Czerner if (ret) 2966bfff6873SLukas Czerner goto out; 2967bfff6873SLukas Czerner } 2968bfff6873SLukas Czerner out: 2969bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2970beed5ecbSNicolas Kaiser if (ret) 2971bfff6873SLukas Czerner kfree(elr); 2972bfff6873SLukas Czerner return ret; 2973bfff6873SLukas Czerner } 2974bfff6873SLukas Czerner 2975bfff6873SLukas Czerner /* 2976bfff6873SLukas Czerner * We do not need to lock anything since this is called on 2977bfff6873SLukas Czerner * module unload. 2978bfff6873SLukas Czerner */ 2979bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 2980bfff6873SLukas Czerner { 2981bfff6873SLukas Czerner /* 2982bfff6873SLukas Czerner * If thread exited earlier 2983bfff6873SLukas Czerner * there's nothing to be done. 2984bfff6873SLukas Czerner */ 2985bfff6873SLukas Czerner if (!ext4_li_info) 2986bfff6873SLukas Czerner return; 2987bfff6873SLukas Czerner 2988bfff6873SLukas Czerner ext4_clear_request_list(); 2989bfff6873SLukas Czerner 2990bfff6873SLukas Czerner while (ext4_li_info->li_task) { 2991bfff6873SLukas Czerner wake_up(&ext4_li_info->li_wait_daemon); 2992bfff6873SLukas Czerner wait_event(ext4_li_info->li_wait_task, 2993bfff6873SLukas Czerner ext4_li_info->li_task == NULL); 2994bfff6873SLukas Czerner } 2995bfff6873SLukas Czerner } 2996bfff6873SLukas Czerner 2997617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 29987477827fSAneesh Kumar K.V __releases(kernel_lock) 29997477827fSAneesh Kumar K.V __acquires(kernel_lock) 3000ac27a0ecSDave Kleikamp { 3001d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3002ac27a0ecSDave Kleikamp struct buffer_head *bh; 3003617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3004617ba13bSMingming Cao struct ext4_sb_info *sbi; 3005617ba13bSMingming Cao ext4_fsblk_t block; 3006617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 300770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3008ac27a0ecSDave Kleikamp unsigned long offset = 0; 3009ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3010ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3011ac27a0ecSDave Kleikamp struct inode *root; 30129f6200bbSTheodore Ts'o char *cp; 30130390131bSFrank Mayhar const char *descr; 3014dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3015ac27a0ecSDave Kleikamp int blocksize; 30164ec11028STheodore Ts'o unsigned int db_count; 30174ec11028STheodore Ts'o unsigned int i; 3018f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 3019bd81d8eeSLaurent Vivier __u64 blocks_count; 3020833f4077SPeter Zijlstra int err; 3021b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3022bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3023ac27a0ecSDave Kleikamp 3024ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3025ac27a0ecSDave Kleikamp if (!sbi) 3026dcc7dae3SCyrill Gorcunov goto out_free_orig; 3027705895b6SPekka Enberg 3028705895b6SPekka Enberg sbi->s_blockgroup_lock = 3029705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3030705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3031705895b6SPekka Enberg kfree(sbi); 3032dcc7dae3SCyrill Gorcunov goto out_free_orig; 3033705895b6SPekka Enberg } 3034ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3035ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3036617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3037617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3038240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3039d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3040f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3041f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3042f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3043ac27a0ecSDave Kleikamp 30449f6200bbSTheodore Ts'o /* Cleanup superblock name */ 30459f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 30469f6200bbSTheodore Ts'o *cp = '!'; 30479f6200bbSTheodore Ts'o 3048dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3049617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3050ac27a0ecSDave Kleikamp if (!blocksize) { 3051b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3052ac27a0ecSDave Kleikamp goto out_fail; 3053ac27a0ecSDave Kleikamp } 3054ac27a0ecSDave Kleikamp 3055ac27a0ecSDave Kleikamp /* 3056617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3057ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3058ac27a0ecSDave Kleikamp */ 3059617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 306070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 306170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3062ac27a0ecSDave Kleikamp } else { 306370bbb3e0SAndrew Morton logical_sb_block = sb_block; 3064ac27a0ecSDave Kleikamp } 3065ac27a0ecSDave Kleikamp 306670bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3067b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3068ac27a0ecSDave Kleikamp goto out_fail; 3069ac27a0ecSDave Kleikamp } 3070ac27a0ecSDave Kleikamp /* 3071ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3072617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3073ac27a0ecSDave Kleikamp */ 3074617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3075ac27a0ecSDave Kleikamp sbi->s_es = es; 3076ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3077617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3078617ba13bSMingming Cao goto cantfind_ext4; 3079afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3080ac27a0ecSDave Kleikamp 3081ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3082ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3083fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3084617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3085fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 3086437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3087437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3088437ca0fdSDmitry Monakhov "2.6.38"); 3089fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3090437ca0fdSDmitry Monakhov } 3091617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3092fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 309303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3094617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 3095fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 30962e7842b8SHugh Dickins #endif 309703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3098617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 3099fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 31002e7842b8SHugh Dickins #endif 3101617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3102fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3103617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3104fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3105617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3106fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3107ac27a0ecSDave Kleikamp 3108617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3109fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3110bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3111fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3112bb4f397aSAneesh Kumar K.V else 3113fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 31148b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3115fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 31168b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3117fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3118ac27a0ecSDave Kleikamp 3119ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3120ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 312130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 312230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 312330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3124ac27a0ecSDave Kleikamp 31258b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3126fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3127ac27a0ecSDave Kleikamp 31281e2462f9SMingming Cao /* 3129dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3130dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3131dd919b98SAneesh Kumar K.V */ 31328b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 31338b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3134fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3135dd919b98SAneesh Kumar K.V 31368b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 31378b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 31388b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 31398b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 31408b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 31418b67f04aSTheodore Ts'o } 3142b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3143b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3144ac27a0ecSDave Kleikamp goto failed_mount; 3145ac27a0ecSDave Kleikamp 3146ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3147482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3148ac27a0ecSDave Kleikamp 3149617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3150617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3151617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3152617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3153b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3154b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3155b31e1552SEric Sandeen "running e2fsck is recommended"); 3156469108ffSTheodore Tso 3157469108ffSTheodore Tso /* 3158ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3159ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3160ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3161ac27a0ecSDave Kleikamp */ 3162a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3163ac27a0ecSDave Kleikamp goto failed_mount; 3164a13fb1a4SEric Sandeen 3165ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3166ac27a0ecSDave Kleikamp 3167617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3168617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3169b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3170b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3171ac27a0ecSDave Kleikamp goto failed_mount; 3172ac27a0ecSDave Kleikamp } 3173ac27a0ecSDave Kleikamp 3174ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3175ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3176ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3177b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3178ce40733cSAneesh Kumar K.V blocksize); 3179ac27a0ecSDave Kleikamp goto failed_mount; 3180ac27a0ecSDave Kleikamp } 3181ac27a0ecSDave Kleikamp 3182ac27a0ecSDave Kleikamp brelse(bh); 318370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 318470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 318570bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3186ac27a0ecSDave Kleikamp if (!bh) { 3187b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3188b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3189ac27a0ecSDave Kleikamp goto failed_mount; 3190ac27a0ecSDave Kleikamp } 3191617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3192ac27a0ecSDave Kleikamp sbi->s_es = es; 3193617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3194b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3195b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3196ac27a0ecSDave Kleikamp goto failed_mount; 3197ac27a0ecSDave Kleikamp } 3198ac27a0ecSDave Kleikamp } 3199ac27a0ecSDave Kleikamp 3200a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3201a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3202f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3203f287a1a5STheodore Ts'o has_huge_files); 3204f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3205ac27a0ecSDave Kleikamp 3206617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3207617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3208617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3209ac27a0ecSDave Kleikamp } else { 3210ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3211ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3212617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 32131330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3214ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3215b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3216b31e1552SEric Sandeen "unsupported inode size: %d", 3217ac27a0ecSDave Kleikamp sbi->s_inode_size); 3218ac27a0ecSDave Kleikamp goto failed_mount; 3219ac27a0ecSDave Kleikamp } 3220ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3221ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3222ac27a0ecSDave Kleikamp } 32230b8e58a1SAndreas Dilger 32240d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 32250d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 32268fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 32270d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3228d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3229b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3230b31e1552SEric Sandeen "unsupported descriptor size %lu", 32310d1ee42fSAlexandre Ratchov sbi->s_desc_size); 32320d1ee42fSAlexandre Ratchov goto failed_mount; 32330d1ee42fSAlexandre Ratchov } 32340d1ee42fSAlexandre Ratchov } else 32350d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 32360b8e58a1SAndreas Dilger 3237ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3238ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3239b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3240617ba13bSMingming Cao goto cantfind_ext4; 32410b8e58a1SAndreas Dilger 3242617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3243ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3244617ba13bSMingming Cao goto cantfind_ext4; 3245ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3246ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 32470d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3248ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3249ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3250e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3251e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 32520b8e58a1SAndreas Dilger 3253ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3254ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3255ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3256f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3257f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3258f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3259f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3260f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3261f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3262f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3263f99b2589STheodore Ts'o #else 3264f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3265f99b2589STheodore Ts'o #endif 3266f99b2589STheodore Ts'o sb->s_dirt = 1; 3267f99b2589STheodore Ts'o } 3268ac27a0ecSDave Kleikamp 3269ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3270b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3271b31e1552SEric Sandeen "#blocks per group too big: %lu", 3272ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3273ac27a0ecSDave Kleikamp goto failed_mount; 3274ac27a0ecSDave Kleikamp } 3275ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3276b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3277b31e1552SEric Sandeen "#inodes per group too big: %lu", 3278ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3279ac27a0ecSDave Kleikamp goto failed_mount; 3280ac27a0ecSDave Kleikamp } 3281ac27a0ecSDave Kleikamp 3282bf43d84bSEric Sandeen /* 3283bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3284bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3285bf43d84bSEric Sandeen */ 32865a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 328730ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 32885a9ae68aSDarrick J. Wong if (err) { 3289b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3290bf43d84bSEric Sandeen " too large to mount safely on this system"); 3291ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 329290c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 32935a9ae68aSDarrick J. Wong ret = err; 3294ac27a0ecSDave Kleikamp goto failed_mount; 3295ac27a0ecSDave Kleikamp } 3296ac27a0ecSDave Kleikamp 3297617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3298617ba13bSMingming Cao goto cantfind_ext4; 3299e7c95593SEric Sandeen 33000f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 33010f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 33020f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3303b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3304b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 33050f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 33060f2ddca6SFrom: Thiemo Nagel goto failed_mount; 33070f2ddca6SFrom: Thiemo Nagel } 33080f2ddca6SFrom: Thiemo Nagel 33094ec11028STheodore Ts'o /* 33104ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 33114ec11028STheodore Ts'o * of the filesystem. 33124ec11028STheodore Ts'o */ 33134ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3314b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 3315b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3316e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 33174ec11028STheodore Ts'o ext4_blocks_count(es)); 3318e7c95593SEric Sandeen goto failed_mount; 3319e7c95593SEric Sandeen } 3320bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3321bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3322bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3323bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 33244ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3325b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 33264ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3327b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 33284ec11028STheodore Ts'o ext4_blocks_count(es), 33294ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 33304ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 33314ec11028STheodore Ts'o goto failed_mount; 33324ec11028STheodore Ts'o } 3333bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3334fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3335fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3336617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3337617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3338ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 3339ac27a0ecSDave Kleikamp GFP_KERNEL); 3340ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3341b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3342ac27a0ecSDave Kleikamp goto failed_mount; 3343ac27a0ecSDave Kleikamp } 3344ac27a0ecSDave Kleikamp 33453244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 33469f6200bbSTheodore Ts'o if (ext4_proc_root) 33479f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 33483244fcb1SAlexander Beregalov #endif 3349240799cdSTheodore Ts'o 3350705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3351ac27a0ecSDave Kleikamp 3352ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 335370bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3354ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3355ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3356b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3357b31e1552SEric Sandeen "can't read group descriptor %d", i); 3358ac27a0ecSDave Kleikamp db_count = i; 3359ac27a0ecSDave Kleikamp goto failed_mount2; 3360ac27a0ecSDave Kleikamp } 3361ac27a0ecSDave Kleikamp } 3362bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3363b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3364ac27a0ecSDave Kleikamp goto failed_mount2; 3365ac27a0ecSDave Kleikamp } 3366772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3367772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3368b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3369b31e1552SEric Sandeen "unable to initialize " 3370b31e1552SEric Sandeen "flex_bg meta info!"); 3371772cb7c8SJose R. Santos goto failed_mount2; 3372772cb7c8SJose R. Santos } 3373772cb7c8SJose R. Santos 3374ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3375ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3376ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3377ac27a0ecSDave Kleikamp 3378ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeblocks_counter, 3379ce7e010aSTheodore Ts'o ext4_count_free_blocks(sb)); 3380ce7e010aSTheodore Ts'o if (!err) { 3381ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3382ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3383ce7e010aSTheodore Ts'o } 3384ce7e010aSTheodore Ts'o if (!err) { 3385ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3386ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3387ce7e010aSTheodore Ts'o } 3388ce7e010aSTheodore Ts'o if (!err) { 3389ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 3390ce7e010aSTheodore Ts'o } 3391ce7e010aSTheodore Ts'o if (err) { 3392ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3393ce7e010aSTheodore Ts'o goto failed_mount3; 3394ce7e010aSTheodore Ts'o } 3395ce7e010aSTheodore Ts'o 3396c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 339755138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3398c9de560dSAlex Tomas 3399ac27a0ecSDave Kleikamp /* 3400ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3401ac27a0ecSDave Kleikamp */ 34029ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 34039ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3404617ba13bSMingming Cao sb->s_op = &ext4_sops; 34059ca92389STheodore Ts'o else 34069ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3407617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3408617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3409ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3410617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3411617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3412ac27a0ecSDave Kleikamp #endif 3413ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 34143b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 341532ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 3416ac27a0ecSDave Kleikamp 3417ac27a0ecSDave Kleikamp sb->s_root = NULL; 3418ac27a0ecSDave Kleikamp 3419ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3420617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3421617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3422ac27a0ecSDave Kleikamp 3423ac27a0ecSDave Kleikamp /* 3424ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3425ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3426ac27a0ecSDave Kleikamp */ 3427ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3428617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3429617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3430ac27a0ecSDave Kleikamp goto failed_mount3; 34310390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 34320390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3433b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3434b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3435744692dcSJiaying Zhang goto failed_mount_wq; 3436ac27a0ecSDave Kleikamp } else { 3437fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 3438fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 34390390131bSFrank Mayhar sbi->s_journal = NULL; 34400390131bSFrank Mayhar needs_recovery = 0; 34410390131bSFrank Mayhar goto no_journal; 3442ac27a0ecSDave Kleikamp } 3443ac27a0ecSDave Kleikamp 3444eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3445eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3446eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3447b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3448744692dcSJiaying Zhang goto failed_mount_wq; 3449eb40a09cSJose R. Santos } 3450eb40a09cSJose R. Santos 3451d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3452d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3453d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3454d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3455d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3456818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3457818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3458818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3459818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3460d4da6c9cSLinus Torvalds } else { 3461d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3462d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3463d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3464d4da6c9cSLinus Torvalds } 3465818d276cSGirish Shilamkar 3466ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3467ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3468ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3469ac27a0ecSDave Kleikamp case 0: 3470ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 347163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 347263f57933SAndrew Morton * cope, else JOURNAL_DATA 347363f57933SAndrew Morton */ 3474dab291afSMingming Cao if (jbd2_journal_check_available_features 3475dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3476fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3477ac27a0ecSDave Kleikamp else 3478fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3479ac27a0ecSDave Kleikamp break; 3480ac27a0ecSDave Kleikamp 3481617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3482617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3483dab291afSMingming Cao if (!jbd2_journal_check_available_features 3484dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3485b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3486b31e1552SEric Sandeen "requested data journaling mode"); 3487744692dcSJiaying Zhang goto failed_mount_wq; 3488ac27a0ecSDave Kleikamp } 3489ac27a0ecSDave Kleikamp default: 3490ac27a0ecSDave Kleikamp break; 3491ac27a0ecSDave Kleikamp } 3492b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3493ac27a0ecSDave Kleikamp 3494ce7e010aSTheodore Ts'o /* 3495ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3496ce7e010aSTheodore Ts'o * need to update the global counters. 3497ce7e010aSTheodore Ts'o */ 3498ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeblocks_counter, 349984061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 3500ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 350184061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3502ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 350384061e07SDmitry Monakhov ext4_count_dirs(sb)); 3504ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); 3505206f7ab4SChristoph Hellwig 3506ce7e010aSTheodore Ts'o no_journal: 35074c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 35084c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 35094c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 35104c0425ffSMingming Cao goto failed_mount_wq; 35114c0425ffSMingming Cao } 35124c0425ffSMingming Cao 3513ac27a0ecSDave Kleikamp /* 3514dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3515ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3516ac27a0ecSDave Kleikamp */ 3517ac27a0ecSDave Kleikamp 35181d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 35191d1fe1eeSDavid Howells if (IS_ERR(root)) { 3520b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 35211d1fe1eeSDavid Howells ret = PTR_ERR(root); 3522ac27a0ecSDave Kleikamp goto failed_mount4; 3523ac27a0ecSDave Kleikamp } 3524ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 35251d1fe1eeSDavid Howells iput(root); 3526b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3527ac27a0ecSDave Kleikamp goto failed_mount4; 3528ac27a0ecSDave Kleikamp } 35291d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 35301d1fe1eeSDavid Howells if (!sb->s_root) { 3531b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 35321d1fe1eeSDavid Howells iput(root); 35331d1fe1eeSDavid Howells ret = -ENOMEM; 35341d1fe1eeSDavid Howells goto failed_mount4; 35351d1fe1eeSDavid Howells } 3536ac27a0ecSDave Kleikamp 3537617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3538ef7f3835SKalpak Shah 3539ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3540ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3541ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3542ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3543ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3544ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3545ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3546ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3547ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3548ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3549ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3550ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3551ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3552ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3553ef7f3835SKalpak Shah } 3554ef7f3835SKalpak Shah } 3555ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3556ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3557ef7f3835SKalpak Shah sbi->s_inode_size) { 3558ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3559ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3560b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3561b31e1552SEric Sandeen "available"); 3562ef7f3835SKalpak Shah } 3563ef7f3835SKalpak Shah 356490576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 356590576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 3566b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 3567b31e1552SEric Sandeen "requested data journaling mode"); 3568fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 356990576c0bSTheodore Ts'o } 3570744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 3571744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 3572744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3573744692dcSJiaying Zhang "option - requested data journaling mode"); 3574fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3575744692dcSJiaying Zhang } 3576744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 3577744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3578744692dcSJiaying Zhang "option - block size is too small"); 3579fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3580744692dcSJiaying Zhang } 3581744692dcSJiaying Zhang } 3582c2774d84SAneesh Kumar K.V 35836fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 35846fd058f7STheodore Ts'o if (err) { 3585b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3586fbe845ddSCurt Wohlgemuth "zone (%d)", err); 35876fd058f7STheodore Ts'o goto failed_mount4; 35886fd058f7STheodore Ts'o } 35896fd058f7STheodore Ts'o 3590c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3591c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3592c2774d84SAneesh Kumar K.V if (err) { 3593421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3594c2774d84SAneesh Kumar K.V err); 3595c2774d84SAneesh Kumar K.V goto failed_mount4; 3596c2774d84SAneesh Kumar K.V } 3597c2774d84SAneesh Kumar K.V 3598bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3599bfff6873SLukas Czerner if (err) 3600bfff6873SLukas Czerner goto failed_mount4; 3601bfff6873SLukas Czerner 36023197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 36033197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 36043197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 36053197ebdbSTheodore Ts'o "%s", sb->s_id); 36063197ebdbSTheodore Ts'o if (err) { 36073197ebdbSTheodore Ts'o ext4_mb_release(sb); 36083197ebdbSTheodore Ts'o ext4_ext_release(sb); 36093197ebdbSTheodore Ts'o goto failed_mount4; 36103197ebdbSTheodore Ts'o }; 36113197ebdbSTheodore Ts'o 3612617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3613617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3614617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 36150390131bSFrank Mayhar if (needs_recovery) { 3616b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3617617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 36180390131bSFrank Mayhar } 36190390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 36200390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 36210390131bSFrank Mayhar descr = " journalled data mode"; 36220390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 36230390131bSFrank Mayhar descr = " ordered data mode"; 36240390131bSFrank Mayhar else 36250390131bSFrank Mayhar descr = " writeback data mode"; 36260390131bSFrank Mayhar } else 36270390131bSFrank Mayhar descr = "out journal"; 36280390131bSFrank Mayhar 3629d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 36308b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 36318b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3632ac27a0ecSDave Kleikamp 363366e61a9eSTheodore Ts'o init_timer(&sbi->s_err_report); 363466e61a9eSTheodore Ts'o sbi->s_err_report.function = print_daily_error_info; 363566e61a9eSTheodore Ts'o sbi->s_err_report.data = (unsigned long) sb; 363666e61a9eSTheodore Ts'o if (es->s_error_count) 363766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3638ac27a0ecSDave Kleikamp 3639d4c402d9SCurt Wohlgemuth kfree(orig_data); 3640ac27a0ecSDave Kleikamp return 0; 3641ac27a0ecSDave Kleikamp 3642617ba13bSMingming Cao cantfind_ext4: 3643ac27a0ecSDave Kleikamp if (!silent) 3644b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3645ac27a0ecSDave Kleikamp goto failed_mount; 3646ac27a0ecSDave Kleikamp 3647ac27a0ecSDave Kleikamp failed_mount4: 3648b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 36494c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 36504c0425ffSMingming Cao failed_mount_wq: 36516fd058f7STheodore Ts'o ext4_release_system_zone(sb); 36520390131bSFrank Mayhar if (sbi->s_journal) { 3653dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 365447b4a50bSJan Kara sbi->s_journal = NULL; 36550390131bSFrank Mayhar } 3656ac27a0ecSDave Kleikamp failed_mount3: 3657c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3658c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3659c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3660c5ca7c76STheodore Ts'o else 3661c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3662c5ca7c76STheodore Ts'o } 3663ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeblocks_counter); 3664ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3665ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 3666ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3667ac27a0ecSDave Kleikamp failed_mount2: 3668ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3669ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3670ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3671ac27a0ecSDave Kleikamp failed_mount: 3672240799cdSTheodore Ts'o if (sbi->s_proc) { 36739f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3674240799cdSTheodore Ts'o } 3675ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3676ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3677ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3678ac27a0ecSDave Kleikamp #endif 3679617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3680ac27a0ecSDave Kleikamp brelse(bh); 3681ac27a0ecSDave Kleikamp out_fail: 3682ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3683f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3684ac27a0ecSDave Kleikamp kfree(sbi); 3685dcc7dae3SCyrill Gorcunov out_free_orig: 3686d4c402d9SCurt Wohlgemuth kfree(orig_data); 36871d1fe1eeSDavid Howells return ret; 3688ac27a0ecSDave Kleikamp } 3689ac27a0ecSDave Kleikamp 3690ac27a0ecSDave Kleikamp /* 3691ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3692ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3693ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3694ac27a0ecSDave Kleikamp */ 3695617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3696ac27a0ecSDave Kleikamp { 3697617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3698ac27a0ecSDave Kleikamp 3699ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 370030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 370130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3702ac27a0ecSDave Kleikamp 3703a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3704ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3705dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3706ac27a0ecSDave Kleikamp else 3707dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 37085bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 37095bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 37105bf5683aSHidehiro Kawai else 37115bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3712a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3713ac27a0ecSDave Kleikamp } 3714ac27a0ecSDave Kleikamp 3715617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3716ac27a0ecSDave Kleikamp unsigned int journal_inum) 3717ac27a0ecSDave Kleikamp { 3718ac27a0ecSDave Kleikamp struct inode *journal_inode; 3719ac27a0ecSDave Kleikamp journal_t *journal; 3720ac27a0ecSDave Kleikamp 37210390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37220390131bSFrank Mayhar 3723ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3724ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3725ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3726ac27a0ecSDave Kleikamp 37271d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 37281d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3729b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3730ac27a0ecSDave Kleikamp return NULL; 3731ac27a0ecSDave Kleikamp } 3732ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3733ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3734ac27a0ecSDave Kleikamp iput(journal_inode); 3735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3736ac27a0ecSDave Kleikamp return NULL; 3737ac27a0ecSDave Kleikamp } 3738ac27a0ecSDave Kleikamp 3739e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3740ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 37411d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3742b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3743ac27a0ecSDave Kleikamp iput(journal_inode); 3744ac27a0ecSDave Kleikamp return NULL; 3745ac27a0ecSDave Kleikamp } 3746ac27a0ecSDave Kleikamp 3747dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3748ac27a0ecSDave Kleikamp if (!journal) { 3749b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3750ac27a0ecSDave Kleikamp iput(journal_inode); 3751ac27a0ecSDave Kleikamp return NULL; 3752ac27a0ecSDave Kleikamp } 3753ac27a0ecSDave Kleikamp journal->j_private = sb; 3754617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3755ac27a0ecSDave Kleikamp return journal; 3756ac27a0ecSDave Kleikamp } 3757ac27a0ecSDave Kleikamp 3758617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3759ac27a0ecSDave Kleikamp dev_t j_dev) 3760ac27a0ecSDave Kleikamp { 3761ac27a0ecSDave Kleikamp struct buffer_head *bh; 3762ac27a0ecSDave Kleikamp journal_t *journal; 3763617ba13bSMingming Cao ext4_fsblk_t start; 3764617ba13bSMingming Cao ext4_fsblk_t len; 3765ac27a0ecSDave Kleikamp int hblock, blocksize; 3766617ba13bSMingming Cao ext4_fsblk_t sb_block; 3767ac27a0ecSDave Kleikamp unsigned long offset; 3768617ba13bSMingming Cao struct ext4_super_block *es; 3769ac27a0ecSDave Kleikamp struct block_device *bdev; 3770ac27a0ecSDave Kleikamp 37710390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37720390131bSFrank Mayhar 3773b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3774ac27a0ecSDave Kleikamp if (bdev == NULL) 3775ac27a0ecSDave Kleikamp return NULL; 3776ac27a0ecSDave Kleikamp 3777ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3778b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3779b31e1552SEric Sandeen "failed to claim external journal device"); 37809a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3781ac27a0ecSDave Kleikamp return NULL; 3782ac27a0ecSDave Kleikamp } 3783ac27a0ecSDave Kleikamp 3784ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3785e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3786ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3787b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3788b31e1552SEric Sandeen "blocksize too small for journal device"); 3789ac27a0ecSDave Kleikamp goto out_bdev; 3790ac27a0ecSDave Kleikamp } 3791ac27a0ecSDave Kleikamp 3792617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3793617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3794ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3795ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3797b31e1552SEric Sandeen "external journal"); 3798ac27a0ecSDave Kleikamp goto out_bdev; 3799ac27a0ecSDave Kleikamp } 3800ac27a0ecSDave Kleikamp 3801617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3802617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3803ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3804617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3805b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3806b31e1552SEric Sandeen "bad superblock"); 3807ac27a0ecSDave Kleikamp brelse(bh); 3808ac27a0ecSDave Kleikamp goto out_bdev; 3809ac27a0ecSDave Kleikamp } 3810ac27a0ecSDave Kleikamp 3811617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3812b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3813ac27a0ecSDave Kleikamp brelse(bh); 3814ac27a0ecSDave Kleikamp goto out_bdev; 3815ac27a0ecSDave Kleikamp } 3816ac27a0ecSDave Kleikamp 3817bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3818ac27a0ecSDave Kleikamp start = sb_block + 1; 3819ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3820ac27a0ecSDave Kleikamp 3821dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3822ac27a0ecSDave Kleikamp start, len, blocksize); 3823ac27a0ecSDave Kleikamp if (!journal) { 3824b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3825ac27a0ecSDave Kleikamp goto out_bdev; 3826ac27a0ecSDave Kleikamp } 3827ac27a0ecSDave Kleikamp journal->j_private = sb; 3828ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3829ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3830ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3831b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3832ac27a0ecSDave Kleikamp goto out_journal; 3833ac27a0ecSDave Kleikamp } 3834ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3835b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3836b31e1552SEric Sandeen "user (unsupported) - %d", 3837ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3838ac27a0ecSDave Kleikamp goto out_journal; 3839ac27a0ecSDave Kleikamp } 3840617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3841617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3842ac27a0ecSDave Kleikamp return journal; 38430b8e58a1SAndreas Dilger 3844ac27a0ecSDave Kleikamp out_journal: 3845dab291afSMingming Cao jbd2_journal_destroy(journal); 3846ac27a0ecSDave Kleikamp out_bdev: 3847617ba13bSMingming Cao ext4_blkdev_put(bdev); 3848ac27a0ecSDave Kleikamp return NULL; 3849ac27a0ecSDave Kleikamp } 3850ac27a0ecSDave Kleikamp 3851617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3852617ba13bSMingming Cao struct ext4_super_block *es, 3853ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3854ac27a0ecSDave Kleikamp { 3855ac27a0ecSDave Kleikamp journal_t *journal; 3856ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3857ac27a0ecSDave Kleikamp dev_t journal_dev; 3858ac27a0ecSDave Kleikamp int err = 0; 3859ac27a0ecSDave Kleikamp int really_read_only; 3860ac27a0ecSDave Kleikamp 38610390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38620390131bSFrank Mayhar 3863ac27a0ecSDave Kleikamp if (journal_devnum && 3864ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3865b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3866b31e1552SEric Sandeen "numbers have changed"); 3867ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3868ac27a0ecSDave Kleikamp } else 3869ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3870ac27a0ecSDave Kleikamp 3871ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3872ac27a0ecSDave Kleikamp 3873ac27a0ecSDave Kleikamp /* 3874ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3875ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3876ac27a0ecSDave Kleikamp * can get read-write access to the device. 3877ac27a0ecSDave Kleikamp */ 3878617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3879ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3880b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3881b31e1552SEric Sandeen "required on readonly filesystem"); 3882ac27a0ecSDave Kleikamp if (really_read_only) { 3883b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3884b31e1552SEric Sandeen "unavailable, cannot proceed"); 3885ac27a0ecSDave Kleikamp return -EROFS; 3886ac27a0ecSDave Kleikamp } 3887b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3888b31e1552SEric Sandeen "be enabled during recovery"); 3889ac27a0ecSDave Kleikamp } 3890ac27a0ecSDave Kleikamp } 3891ac27a0ecSDave Kleikamp 3892ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3893b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3894b31e1552SEric Sandeen "and inode journals!"); 3895ac27a0ecSDave Kleikamp return -EINVAL; 3896ac27a0ecSDave Kleikamp } 3897ac27a0ecSDave Kleikamp 3898ac27a0ecSDave Kleikamp if (journal_inum) { 3899617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3900ac27a0ecSDave Kleikamp return -EINVAL; 3901ac27a0ecSDave Kleikamp } else { 3902617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3903ac27a0ecSDave Kleikamp return -EINVAL; 3904ac27a0ecSDave Kleikamp } 3905ac27a0ecSDave Kleikamp 390690576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3907b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 39084776004fSTheodore Ts'o 3909ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3910dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3911ac27a0ecSDave Kleikamp if (err) { 3912b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3913dab291afSMingming Cao jbd2_journal_destroy(journal); 3914ac27a0ecSDave Kleikamp return err; 3915ac27a0ecSDave Kleikamp } 3916ac27a0ecSDave Kleikamp } 3917ac27a0ecSDave Kleikamp 3918617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3919dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 39201c13d5c0STheodore Ts'o if (!err) { 39211c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 39221c13d5c0STheodore Ts'o if (save) 39231c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 39241c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 3925dab291afSMingming Cao err = jbd2_journal_load(journal); 39261c13d5c0STheodore Ts'o if (save) 39271c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 39281c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 39291c13d5c0STheodore Ts'o kfree(save); 39301c13d5c0STheodore Ts'o } 3931ac27a0ecSDave Kleikamp 3932ac27a0ecSDave Kleikamp if (err) { 3933b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3934dab291afSMingming Cao jbd2_journal_destroy(journal); 3935ac27a0ecSDave Kleikamp return err; 3936ac27a0ecSDave Kleikamp } 3937ac27a0ecSDave Kleikamp 3938617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3939617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3940ac27a0ecSDave Kleikamp 3941c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 3942ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3943ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3944ac27a0ecSDave Kleikamp 3945ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3946e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3947ac27a0ecSDave Kleikamp } 3948ac27a0ecSDave Kleikamp 3949ac27a0ecSDave Kleikamp return 0; 3950ac27a0ecSDave Kleikamp } 3951ac27a0ecSDave Kleikamp 3952e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3953ac27a0ecSDave Kleikamp { 3954e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3955617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3956c4be0c1dSTakashi Sato int error = 0; 3957ac27a0ecSDave Kleikamp 3958ac27a0ecSDave Kleikamp if (!sbh) 3959c4be0c1dSTakashi Sato return error; 3960914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3961914258bfSTheodore Ts'o /* 3962914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3963914258bfSTheodore Ts'o * superblock failed. This could happen because the 3964914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3965914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3966914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3967914258bfSTheodore Ts'o * write and hope for the best. 3968914258bfSTheodore Ts'o */ 3969b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3970b31e1552SEric Sandeen "superblock detected"); 3971914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3972914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3973914258bfSTheodore Ts'o } 397471290b36STheodore Ts'o /* 397571290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 397671290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 397771290b36STheodore Ts'o * write time when we are mounting the root file system 397871290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 397971290b36STheodore Ts'o * for people who are east of GMT and who make their clock 398071290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 398171290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 398271290b36STheodore Ts'o * to complain and force a full file system check. 398371290b36STheodore Ts'o */ 398471290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3985ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3986f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3987afc32f7eSTheodore Ts'o es->s_kbytes_written = 3988afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3989afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3990afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 3991f613dfcbSTheodore Ts'o else 3992f613dfcbSTheodore Ts'o es->s_kbytes_written = 3993f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 39945d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 39955d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 39967f93cff9STheodore Ts'o es->s_free_inodes_count = 39977f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 39985d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 39997234ab2aSTheodore Ts'o sb->s_dirt = 0; 4000ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4001ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4002914258bfSTheodore Ts'o if (sync) { 4003c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4004c4be0c1dSTakashi Sato if (error) 4005c4be0c1dSTakashi Sato return error; 4006c4be0c1dSTakashi Sato 4007c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4008c4be0c1dSTakashi Sato if (error) { 4009b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4010b31e1552SEric Sandeen "superblock"); 4011914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4012914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4013914258bfSTheodore Ts'o } 4014914258bfSTheodore Ts'o } 4015c4be0c1dSTakashi Sato return error; 4016ac27a0ecSDave Kleikamp } 4017ac27a0ecSDave Kleikamp 4018ac27a0ecSDave Kleikamp /* 4019ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4020ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4021ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4022ac27a0ecSDave Kleikamp */ 4023617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4024617ba13bSMingming Cao struct ext4_super_block *es) 4025ac27a0ecSDave Kleikamp { 4026617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4027ac27a0ecSDave Kleikamp 40280390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 40290390131bSFrank Mayhar BUG_ON(journal != NULL); 40300390131bSFrank Mayhar return; 40310390131bSFrank Mayhar } 4032dab291afSMingming Cao jbd2_journal_lock_updates(journal); 40337ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 40347ffe1ea8SHidehiro Kawai goto out; 40357ffe1ea8SHidehiro Kawai 4036617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4037ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4038617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4039e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4040ac27a0ecSDave Kleikamp } 40417ffe1ea8SHidehiro Kawai 40427ffe1ea8SHidehiro Kawai out: 4043dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4044ac27a0ecSDave Kleikamp } 4045ac27a0ecSDave Kleikamp 4046ac27a0ecSDave Kleikamp /* 4047ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4048ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4049ac27a0ecSDave Kleikamp * main filesystem now. 4050ac27a0ecSDave Kleikamp */ 4051617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4052617ba13bSMingming Cao struct ext4_super_block *es) 4053ac27a0ecSDave Kleikamp { 4054ac27a0ecSDave Kleikamp journal_t *journal; 4055ac27a0ecSDave Kleikamp int j_errno; 4056ac27a0ecSDave Kleikamp const char *errstr; 4057ac27a0ecSDave Kleikamp 40580390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40590390131bSFrank Mayhar 4060617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4061ac27a0ecSDave Kleikamp 4062ac27a0ecSDave Kleikamp /* 4063ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4064617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4065ac27a0ecSDave Kleikamp */ 4066ac27a0ecSDave Kleikamp 4067dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4068ac27a0ecSDave Kleikamp if (j_errno) { 4069ac27a0ecSDave Kleikamp char nbuf[16]; 4070ac27a0ecSDave Kleikamp 4071617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 407212062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4073ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 407412062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4075ac27a0ecSDave Kleikamp 4076617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4077617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4078e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4079ac27a0ecSDave Kleikamp 4080dab291afSMingming Cao jbd2_journal_clear_err(journal); 4081ac27a0ecSDave Kleikamp } 4082ac27a0ecSDave Kleikamp } 4083ac27a0ecSDave Kleikamp 4084ac27a0ecSDave Kleikamp /* 4085ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4086ac27a0ecSDave Kleikamp * and wait on the commit. 4087ac27a0ecSDave Kleikamp */ 4088617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4089ac27a0ecSDave Kleikamp { 4090ac27a0ecSDave Kleikamp journal_t *journal; 40910390131bSFrank Mayhar int ret = 0; 4092ac27a0ecSDave Kleikamp 4093ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4094ac27a0ecSDave Kleikamp return 0; 4095ac27a0ecSDave Kleikamp 4096617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 40976b0310fbSEric Sandeen if (journal) { 4098437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4099617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 41006b0310fbSEric Sandeen } 41010390131bSFrank Mayhar 4102ac27a0ecSDave Kleikamp return ret; 4103ac27a0ecSDave Kleikamp } 4104ac27a0ecSDave Kleikamp 4105617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4106ac27a0ecSDave Kleikamp { 4107ebc1ac16SChristoph Hellwig lock_super(sb); 4108e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4109ebc1ac16SChristoph Hellwig unlock_super(sb); 41100390131bSFrank Mayhar } 4111ac27a0ecSDave Kleikamp 4112617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4113ac27a0ecSDave Kleikamp { 411414ce0cb4STheodore Ts'o int ret = 0; 41159eddacf9SJan Kara tid_t target; 41168d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4117ac27a0ecSDave Kleikamp 41189bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 41198d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 41208d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4121ac27a0ecSDave Kleikamp if (wait) 41228d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 41230390131bSFrank Mayhar } 412414ce0cb4STheodore Ts'o return ret; 4125ac27a0ecSDave Kleikamp } 4126ac27a0ecSDave Kleikamp 4127ac27a0ecSDave Kleikamp /* 4128ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4129ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4130ac27a0ecSDave Kleikamp */ 4131c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4132ac27a0ecSDave Kleikamp { 4133c4be0c1dSTakashi Sato int error = 0; 4134c4be0c1dSTakashi Sato journal_t *journal; 4135ac27a0ecSDave Kleikamp 41369ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41379ca92389STheodore Ts'o return 0; 41389ca92389STheodore Ts'o 4139c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4140ac27a0ecSDave Kleikamp 4141ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4142dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41437ffe1ea8SHidehiro Kawai 41447ffe1ea8SHidehiro Kawai /* 41459ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 41469ca92389STheodore Ts'o * the journal. 41477ffe1ea8SHidehiro Kawai */ 4148c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 41496b0310fbSEric Sandeen if (error < 0) 41506b0310fbSEric Sandeen goto out; 4151ac27a0ecSDave Kleikamp 4152ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4153617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4154e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 41556b0310fbSEric Sandeen out: 41566b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 41576b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 41586b0310fbSEric Sandeen return error; 4159ac27a0ecSDave Kleikamp } 4160ac27a0ecSDave Kleikamp 4161ac27a0ecSDave Kleikamp /* 4162ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4163ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4164ac27a0ecSDave Kleikamp */ 4165c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4166ac27a0ecSDave Kleikamp { 41679ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41689ca92389STheodore Ts'o return 0; 41699ca92389STheodore Ts'o 4170ac27a0ecSDave Kleikamp lock_super(sb); 41719ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4172617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4173e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4174ac27a0ecSDave Kleikamp unlock_super(sb); 4175c4be0c1dSTakashi Sato return 0; 4176ac27a0ecSDave Kleikamp } 4177ac27a0ecSDave Kleikamp 4178673c6100STheodore Ts'o /* 4179673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4180673c6100STheodore Ts'o */ 4181673c6100STheodore Ts'o struct ext4_mount_options { 4182673c6100STheodore Ts'o unsigned long s_mount_opt; 4183a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4184673c6100STheodore Ts'o uid_t s_resuid; 4185673c6100STheodore Ts'o gid_t s_resgid; 4186673c6100STheodore Ts'o unsigned long s_commit_interval; 4187673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4188673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4189673c6100STheodore Ts'o int s_jquota_fmt; 4190673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4191673c6100STheodore Ts'o #endif 4192673c6100STheodore Ts'o }; 4193673c6100STheodore Ts'o 4194617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4195ac27a0ecSDave Kleikamp { 4196617ba13bSMingming Cao struct ext4_super_block *es; 4197617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4198617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4199ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4200617ba13bSMingming Cao struct ext4_mount_options old_opts; 4201c79d967dSChristoph Hellwig int enable_quota = 0; 42028a266467STheodore Ts'o ext4_group_t g; 4203b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4204ac27a0ecSDave Kleikamp int err; 4205ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4206ac27a0ecSDave Kleikamp int i; 4207ac27a0ecSDave Kleikamp #endif 4208d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4209ac27a0ecSDave Kleikamp 4210ac27a0ecSDave Kleikamp /* Store the original options */ 4211bbd6851aSAl Viro lock_super(sb); 4212ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4213ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4214a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4215ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4216ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4217ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 421830773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 421930773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4220ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4221ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4222ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4223ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4224ac27a0ecSDave Kleikamp #endif 4225b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4226b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4227ac27a0ecSDave Kleikamp 4228ac27a0ecSDave Kleikamp /* 4229ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4230ac27a0ecSDave Kleikamp */ 4231b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4232b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4233ac27a0ecSDave Kleikamp err = -EINVAL; 4234ac27a0ecSDave Kleikamp goto restore_opts; 4235ac27a0ecSDave Kleikamp } 4236ac27a0ecSDave Kleikamp 42374ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4238c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4239ac27a0ecSDave Kleikamp 4240ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4241482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4242ac27a0ecSDave Kleikamp 4243ac27a0ecSDave Kleikamp es = sbi->s_es; 4244ac27a0ecSDave Kleikamp 4245b3881f74STheodore Ts'o if (sbi->s_journal) { 4246617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4247b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4248b3881f74STheodore Ts'o } 4249ac27a0ecSDave Kleikamp 4250ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4251bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 42524ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4253ac27a0ecSDave Kleikamp err = -EROFS; 4254ac27a0ecSDave Kleikamp goto restore_opts; 4255ac27a0ecSDave Kleikamp } 4256ac27a0ecSDave Kleikamp 4257ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 42580f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 42590f0dd62fSChristoph Hellwig if (err < 0) 4260c79d967dSChristoph Hellwig goto restore_opts; 4261c79d967dSChristoph Hellwig 4262ac27a0ecSDave Kleikamp /* 4263ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4264ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4265ac27a0ecSDave Kleikamp */ 4266ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4267ac27a0ecSDave Kleikamp 4268ac27a0ecSDave Kleikamp /* 4269ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4270ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4271ac27a0ecSDave Kleikamp * mark the partition as valid again. 4272ac27a0ecSDave Kleikamp */ 4273617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4274617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4275ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4276ac27a0ecSDave Kleikamp 4277a63c9eb2STheodore Ts'o if (sbi->s_journal) 4278617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4279ac27a0ecSDave Kleikamp } else { 4280a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4281a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4282ac27a0ecSDave Kleikamp err = -EROFS; 4283ac27a0ecSDave Kleikamp goto restore_opts; 4284ac27a0ecSDave Kleikamp } 4285ead6596bSEric Sandeen /* 42868a266467STheodore Ts'o * Make sure the group descriptor checksums 42870b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 42888a266467STheodore Ts'o */ 42898a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 42908a266467STheodore Ts'o struct ext4_group_desc *gdp = 42918a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 42928a266467STheodore Ts'o 42938a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4294b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4295b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 42968a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 42978a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 42988a266467STheodore Ts'o err = -EINVAL; 42998a266467STheodore Ts'o goto restore_opts; 43008a266467STheodore Ts'o } 43018a266467STheodore Ts'o } 43028a266467STheodore Ts'o 43038a266467STheodore Ts'o /* 4304ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4305ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4306ead6596bSEric Sandeen * require a full umount/remount for now. 4307ead6596bSEric Sandeen */ 4308ead6596bSEric Sandeen if (es->s_last_orphan) { 4309b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4310ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4311ead6596bSEric Sandeen "orphan inode list. Please " 4312b31e1552SEric Sandeen "umount/remount instead"); 4313ead6596bSEric Sandeen err = -EINVAL; 4314ead6596bSEric Sandeen goto restore_opts; 4315ead6596bSEric Sandeen } 4316ead6596bSEric Sandeen 4317ac27a0ecSDave Kleikamp /* 4318ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4319ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4320ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4321ac27a0ecSDave Kleikamp * the partition.) 4322ac27a0ecSDave Kleikamp */ 43230390131bSFrank Mayhar if (sbi->s_journal) 4324617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4325ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4326617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4327ac27a0ecSDave Kleikamp goto restore_opts; 4328617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4329ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4330c79d967dSChristoph Hellwig enable_quota = 1; 4331ac27a0ecSDave Kleikamp } 4332ac27a0ecSDave Kleikamp } 4333bfff6873SLukas Czerner 4334bfff6873SLukas Czerner /* 4335bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4336bfff6873SLukas Czerner * current settings 4337bfff6873SLukas Czerner */ 4338bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4339bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4340bfff6873SLukas Czerner else { 4341bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4342bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4343bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4344bfff6873SLukas Czerner } 4345bfff6873SLukas Czerner 43466fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 43470390131bSFrank Mayhar if (sbi->s_journal == NULL) 4348e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 43490390131bSFrank Mayhar 4350ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4351ac27a0ecSDave Kleikamp /* Release old quota file names */ 4352ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4353ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4354ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4355ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4356ac27a0ecSDave Kleikamp #endif 4357bbd6851aSAl Viro unlock_super(sb); 4358c79d967dSChristoph Hellwig if (enable_quota) 43590f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4360d4c402d9SCurt Wohlgemuth 4361d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4362d4c402d9SCurt Wohlgemuth kfree(orig_data); 4363ac27a0ecSDave Kleikamp return 0; 43640b8e58a1SAndreas Dilger 4365ac27a0ecSDave Kleikamp restore_opts: 4366ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4367ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4368a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4369ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4370ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4371ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 437230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 437330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4374ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4375ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4376ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4377ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4378ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4379ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4380ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4381ac27a0ecSDave Kleikamp } 4382ac27a0ecSDave Kleikamp #endif 4383bbd6851aSAl Viro unlock_super(sb); 4384d4c402d9SCurt Wohlgemuth kfree(orig_data); 4385ac27a0ecSDave Kleikamp return err; 4386ac27a0ecSDave Kleikamp } 4387ac27a0ecSDave Kleikamp 4388617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4389ac27a0ecSDave Kleikamp { 4390ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4391617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4392617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4393960cc398SPekka Enberg u64 fsid; 4394ac27a0ecSDave Kleikamp 43955e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 43965e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 43976bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 43988df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 43995e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4400ac27a0ecSDave Kleikamp 4401ac27a0ecSDave Kleikamp /* 44025e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 44035e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 44045e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4405ac27a0ecSDave Kleikamp */ 4406ac27a0ecSDave Kleikamp 4407ac27a0ecSDave Kleikamp /* 4408ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4409ac27a0ecSDave Kleikamp * overhead 4410ac27a0ecSDave Kleikamp */ 4411ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 4412ac27a0ecSDave Kleikamp 4413ac27a0ecSDave Kleikamp /* 4414ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 4415ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 4416ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 4417ac27a0ecSDave Kleikamp */ 4418ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4419617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 4420617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 4421ac27a0ecSDave Kleikamp cond_resched(); 4422ac27a0ecSDave Kleikamp } 4423ac27a0ecSDave Kleikamp 4424ac27a0ecSDave Kleikamp /* 4425ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 4426ac27a0ecSDave Kleikamp * bitmap, and an inode table. 4427ac27a0ecSDave Kleikamp */ 44285e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 44295e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 44305e70030dSBadari Pulavarty smp_wmb(); 44316bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4432ac27a0ecSDave Kleikamp } 4433ac27a0ecSDave Kleikamp 4434617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4435ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 44365e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 44376bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 44386bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 4439bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4440bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4441ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4442ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 444352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4444617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4445960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4446960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4447960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4448960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 44490b8e58a1SAndreas Dilger 4450ac27a0ecSDave Kleikamp return 0; 4451ac27a0ecSDave Kleikamp } 4452ac27a0ecSDave Kleikamp 44530b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 44540b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4455ac27a0ecSDave Kleikamp * Process 1 Process 2 4456617ba13bSMingming Cao * ext4_create() quota_sync() 4457dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4458871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4459dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4460ac27a0ecSDave Kleikamp * 4461ac27a0ecSDave Kleikamp */ 4462ac27a0ecSDave Kleikamp 4463ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4464ac27a0ecSDave Kleikamp 4465ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4466ac27a0ecSDave Kleikamp { 4467ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4468ac27a0ecSDave Kleikamp } 4469ac27a0ecSDave Kleikamp 4470617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4471ac27a0ecSDave Kleikamp { 4472ac27a0ecSDave Kleikamp int ret, err; 4473ac27a0ecSDave Kleikamp handle_t *handle; 4474ac27a0ecSDave Kleikamp struct inode *inode; 4475ac27a0ecSDave Kleikamp 4476ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4477617ba13bSMingming Cao handle = ext4_journal_start(inode, 4478617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4479ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4480ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4481ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4482617ba13bSMingming Cao err = ext4_journal_stop(handle); 4483ac27a0ecSDave Kleikamp if (!ret) 4484ac27a0ecSDave Kleikamp ret = err; 4485ac27a0ecSDave Kleikamp return ret; 4486ac27a0ecSDave Kleikamp } 4487ac27a0ecSDave Kleikamp 4488617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4489ac27a0ecSDave Kleikamp { 4490ac27a0ecSDave Kleikamp int ret, err; 4491ac27a0ecSDave Kleikamp handle_t *handle; 4492ac27a0ecSDave Kleikamp 4493617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4494617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4495ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4496ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4497ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4498617ba13bSMingming Cao err = ext4_journal_stop(handle); 4499ac27a0ecSDave Kleikamp if (!ret) 4500ac27a0ecSDave Kleikamp ret = err; 4501ac27a0ecSDave Kleikamp return ret; 4502ac27a0ecSDave Kleikamp } 4503ac27a0ecSDave Kleikamp 4504617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4505ac27a0ecSDave Kleikamp { 4506ac27a0ecSDave Kleikamp int ret, err; 4507ac27a0ecSDave Kleikamp handle_t *handle; 4508ac27a0ecSDave Kleikamp 4509617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4510617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 45119c3013e9SJan Kara if (IS_ERR(handle)) { 45129c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 45139c3013e9SJan Kara dquot_release(dquot); 4514ac27a0ecSDave Kleikamp return PTR_ERR(handle); 45159c3013e9SJan Kara } 4516ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4517617ba13bSMingming Cao err = ext4_journal_stop(handle); 4518ac27a0ecSDave Kleikamp if (!ret) 4519ac27a0ecSDave Kleikamp ret = err; 4520ac27a0ecSDave Kleikamp return ret; 4521ac27a0ecSDave Kleikamp } 4522ac27a0ecSDave Kleikamp 4523617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4524ac27a0ecSDave Kleikamp { 45252c8be6b2SJan Kara /* Are we journaling quotas? */ 4526617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4527617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4528ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4529617ba13bSMingming Cao return ext4_write_dquot(dquot); 4530ac27a0ecSDave Kleikamp } else { 4531ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4532ac27a0ecSDave Kleikamp } 4533ac27a0ecSDave Kleikamp } 4534ac27a0ecSDave Kleikamp 4535617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4536ac27a0ecSDave Kleikamp { 4537ac27a0ecSDave Kleikamp int ret, err; 4538ac27a0ecSDave Kleikamp handle_t *handle; 4539ac27a0ecSDave Kleikamp 4540ac27a0ecSDave Kleikamp /* Data block + inode block */ 4541617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4542ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4543ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4544ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4545617ba13bSMingming Cao err = ext4_journal_stop(handle); 4546ac27a0ecSDave Kleikamp if (!ret) 4547ac27a0ecSDave Kleikamp ret = err; 4548ac27a0ecSDave Kleikamp return ret; 4549ac27a0ecSDave Kleikamp } 4550ac27a0ecSDave Kleikamp 4551ac27a0ecSDave Kleikamp /* 4552ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4553ac27a0ecSDave Kleikamp * the quota file and such... 4554ac27a0ecSDave Kleikamp */ 4555617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4556ac27a0ecSDave Kleikamp { 4557287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4558617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4559ac27a0ecSDave Kleikamp } 4560ac27a0ecSDave Kleikamp 4561ac27a0ecSDave Kleikamp /* 4562ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4563ac27a0ecSDave Kleikamp */ 4564617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4565307ae18aSChristoph Hellwig char *name) 4566ac27a0ecSDave Kleikamp { 4567ac27a0ecSDave Kleikamp int err; 45688264613dSAl Viro struct path path; 4569ac27a0ecSDave Kleikamp 4570ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4571ac27a0ecSDave Kleikamp return -EINVAL; 45720623543bSJan Kara 45738264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 4574ac27a0ecSDave Kleikamp if (err) 4575ac27a0ecSDave Kleikamp return err; 45760623543bSJan Kara 4577ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 45788264613dSAl Viro if (path.mnt->mnt_sb != sb) { 45798264613dSAl Viro path_put(&path); 4580ac27a0ecSDave Kleikamp return -EXDEV; 4581ac27a0ecSDave Kleikamp } 45820623543bSJan Kara /* Journaling quota? */ 45830623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 45842b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 45858264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 4586b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4587b31e1552SEric Sandeen "Quota file not on filesystem root. " 4588b31e1552SEric Sandeen "Journaled quota will not work"); 45890623543bSJan Kara } 45900623543bSJan Kara 45910623543bSJan Kara /* 45920623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 45930623543bSJan Kara * all updates to the file when we bypass pagecache... 45940623543bSJan Kara */ 45950390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 45960390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 45970623543bSJan Kara /* 45980623543bSJan Kara * We don't need to lock updates but journal_flush() could 45990623543bSJan Kara * otherwise be livelocked... 46000623543bSJan Kara */ 46010623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 46027ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 46030623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 46047ffe1ea8SHidehiro Kawai if (err) { 46058264613dSAl Viro path_put(&path); 46067ffe1ea8SHidehiro Kawai return err; 46077ffe1ea8SHidehiro Kawai } 46080623543bSJan Kara } 46090623543bSJan Kara 4610287a8095SChristoph Hellwig err = dquot_quota_on_path(sb, type, format_id, &path); 46118264613dSAl Viro path_put(&path); 461277e69dacSAl Viro return err; 4613ac27a0ecSDave Kleikamp } 4614ac27a0ecSDave Kleikamp 4615ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4616ca0e05e4SDmitry Monakhov { 461787009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 461887009d86SDmitry Monakhov * Caller already holds s_umount sem */ 461987009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4620ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4621ca0e05e4SDmitry Monakhov 4622ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4623ca0e05e4SDmitry Monakhov } 4624ca0e05e4SDmitry Monakhov 4625ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4626ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4627ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 4628ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4629617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4630ac27a0ecSDave Kleikamp size_t len, loff_t off) 4631ac27a0ecSDave Kleikamp { 4632ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4633725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4634ac27a0ecSDave Kleikamp int err = 0; 4635ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4636ac27a0ecSDave Kleikamp int tocopy; 4637ac27a0ecSDave Kleikamp size_t toread; 4638ac27a0ecSDave Kleikamp struct buffer_head *bh; 4639ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4640ac27a0ecSDave Kleikamp 4641ac27a0ecSDave Kleikamp if (off > i_size) 4642ac27a0ecSDave Kleikamp return 0; 4643ac27a0ecSDave Kleikamp if (off+len > i_size) 4644ac27a0ecSDave Kleikamp len = i_size-off; 4645ac27a0ecSDave Kleikamp toread = len; 4646ac27a0ecSDave Kleikamp while (toread > 0) { 4647ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4648ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4649617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4650ac27a0ecSDave Kleikamp if (err) 4651ac27a0ecSDave Kleikamp return err; 4652ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4653ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4654ac27a0ecSDave Kleikamp else 4655ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4656ac27a0ecSDave Kleikamp brelse(bh); 4657ac27a0ecSDave Kleikamp offset = 0; 4658ac27a0ecSDave Kleikamp toread -= tocopy; 4659ac27a0ecSDave Kleikamp data += tocopy; 4660ac27a0ecSDave Kleikamp blk++; 4661ac27a0ecSDave Kleikamp } 4662ac27a0ecSDave Kleikamp return len; 4663ac27a0ecSDave Kleikamp } 4664ac27a0ecSDave Kleikamp 4665ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4666ac27a0ecSDave Kleikamp * enough credits) */ 4667617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4668ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4669ac27a0ecSDave Kleikamp { 4670ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4671725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4672ac27a0ecSDave Kleikamp int err = 0; 4673ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4674ac27a0ecSDave Kleikamp struct buffer_head *bh; 4675ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4676ac27a0ecSDave Kleikamp 46770390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4678b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4679b31e1552SEric Sandeen " cancelled because transaction is not started", 46809c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 46819c3013e9SJan Kara return -EIO; 46829c3013e9SJan Kara } 468367eeb568SDmitry Monakhov /* 468467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 468567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 468667eeb568SDmitry Monakhov */ 468767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 468867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 468967eeb568SDmitry Monakhov " cancelled because not block aligned", 469067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 469167eeb568SDmitry Monakhov return -EIO; 469267eeb568SDmitry Monakhov } 469367eeb568SDmitry Monakhov 4694ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4695617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4696ac27a0ecSDave Kleikamp if (!bh) 4697ac27a0ecSDave Kleikamp goto out; 4698617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4699ac27a0ecSDave Kleikamp if (err) { 4700ac27a0ecSDave Kleikamp brelse(bh); 4701ac27a0ecSDave Kleikamp goto out; 4702ac27a0ecSDave Kleikamp } 4703ac27a0ecSDave Kleikamp lock_buffer(bh); 470467eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4705ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4706ac27a0ecSDave Kleikamp unlock_buffer(bh); 47070390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4708ac27a0ecSDave Kleikamp brelse(bh); 4709ac27a0ecSDave Kleikamp out: 471067eeb568SDmitry Monakhov if (err) { 47114d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4712ac27a0ecSDave Kleikamp return err; 47134d04e4fbSJan Kara } 471467eeb568SDmitry Monakhov if (inode->i_size < off + len) { 471567eeb568SDmitry Monakhov i_size_write(inode, off + len); 4716617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4717ac27a0ecSDave Kleikamp } 4718ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4719617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4720ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 472167eeb568SDmitry Monakhov return len; 4722ac27a0ecSDave Kleikamp } 4723ac27a0ecSDave Kleikamp 4724ac27a0ecSDave Kleikamp #endif 4725ac27a0ecSDave Kleikamp 4726152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4727152a0836SAl Viro const char *dev_name, void *data) 4728ac27a0ecSDave Kleikamp { 4729152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4730ac27a0ecSDave Kleikamp } 4731ac27a0ecSDave Kleikamp 473237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 473324b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 473424b58424STheodore Ts'o .owner = THIS_MODULE, 473524b58424STheodore Ts'o .name = "ext2", 4736152a0836SAl Viro .mount = ext4_mount, 473724b58424STheodore Ts'o .kill_sb = kill_block_super, 473824b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 473924b58424STheodore Ts'o }; 474024b58424STheodore Ts'o 474124b58424STheodore Ts'o static inline void register_as_ext2(void) 474224b58424STheodore Ts'o { 474324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 474424b58424STheodore Ts'o if (err) 474524b58424STheodore Ts'o printk(KERN_WARNING 474624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 474724b58424STheodore Ts'o } 474824b58424STheodore Ts'o 474924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 475024b58424STheodore Ts'o { 475124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 475224b58424STheodore Ts'o } 475351b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 475424b58424STheodore Ts'o #else 475524b58424STheodore Ts'o static inline void register_as_ext2(void) { } 475624b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 475724b58424STheodore Ts'o #endif 475824b58424STheodore Ts'o 475937f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 476024b58424STheodore Ts'o static inline void register_as_ext3(void) 476124b58424STheodore Ts'o { 476224b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 476324b58424STheodore Ts'o if (err) 476424b58424STheodore Ts'o printk(KERN_WARNING 476524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 476624b58424STheodore Ts'o } 476724b58424STheodore Ts'o 476824b58424STheodore Ts'o static inline void unregister_as_ext3(void) 476924b58424STheodore Ts'o { 477024b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 477124b58424STheodore Ts'o } 477251b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 477324b58424STheodore Ts'o #else 477424b58424STheodore Ts'o static inline void register_as_ext3(void) { } 477524b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 477624b58424STheodore Ts'o #endif 477724b58424STheodore Ts'o 477803010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4779ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 478003010a33STheodore Ts'o .name = "ext4", 4781152a0836SAl Viro .mount = ext4_mount, 4782ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4783ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4784ac27a0ecSDave Kleikamp }; 4785ac27a0ecSDave Kleikamp 4786857ac889SLukas Czerner int __init ext4_init_feat_adverts(void) 4787857ac889SLukas Czerner { 4788857ac889SLukas Czerner struct ext4_features *ef; 4789857ac889SLukas Czerner int ret = -ENOMEM; 4790857ac889SLukas Czerner 4791857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4792857ac889SLukas Czerner if (!ef) 4793857ac889SLukas Czerner goto out; 4794857ac889SLukas Czerner 4795857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4796857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4797857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4798857ac889SLukas Czerner "features"); 4799857ac889SLukas Czerner if (ret) { 4800857ac889SLukas Czerner kfree(ef); 4801857ac889SLukas Czerner goto out; 4802857ac889SLukas Czerner } 4803857ac889SLukas Czerner 4804857ac889SLukas Czerner ext4_feat = ef; 4805857ac889SLukas Czerner ret = 0; 4806857ac889SLukas Czerner out: 4807857ac889SLukas Czerner return ret; 4808857ac889SLukas Czerner } 4809857ac889SLukas Czerner 48105dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 4811ac27a0ecSDave Kleikamp { 4812c9de560dSAlex Tomas int err; 4813c9de560dSAlex Tomas 481412e9b892SDmitry Monakhov ext4_check_flag_values(); 48155dabfc78STheodore Ts'o err = ext4_init_pageio(); 48166fd058f7STheodore Ts'o if (err) 48176fd058f7STheodore Ts'o return err; 48185dabfc78STheodore Ts'o err = ext4_init_system_zone(); 4819bd2d0210STheodore Ts'o if (err) 4820bd2d0210STheodore Ts'o goto out5; 48213197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 48223197ebdbSTheodore Ts'o if (!ext4_kset) 48236fd058f7STheodore Ts'o goto out4; 48249f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4825857ac889SLukas Czerner 4826857ac889SLukas Czerner err = ext4_init_feat_adverts(); 4827857ac889SLukas Czerner 48285dabfc78STheodore Ts'o err = ext4_init_mballoc(); 4829ac27a0ecSDave Kleikamp if (err) 48306fd058f7STheodore Ts'o goto out3; 4831c9de560dSAlex Tomas 48325dabfc78STheodore Ts'o err = ext4_init_xattr(); 4833c9de560dSAlex Tomas if (err) 4834c9de560dSAlex Tomas goto out2; 4835ac27a0ecSDave Kleikamp err = init_inodecache(); 4836ac27a0ecSDave Kleikamp if (err) 4837ac27a0ecSDave Kleikamp goto out1; 483824b58424STheodore Ts'o register_as_ext2(); 483924b58424STheodore Ts'o register_as_ext3(); 484003010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4841ac27a0ecSDave Kleikamp if (err) 4842ac27a0ecSDave Kleikamp goto out; 4843bfff6873SLukas Czerner 4844bfff6873SLukas Czerner ext4_li_info = NULL; 4845bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 4846ac27a0ecSDave Kleikamp return 0; 4847ac27a0ecSDave Kleikamp out: 484824b58424STheodore Ts'o unregister_as_ext2(); 484924b58424STheodore Ts'o unregister_as_ext3(); 4850ac27a0ecSDave Kleikamp destroy_inodecache(); 4851ac27a0ecSDave Kleikamp out1: 48525dabfc78STheodore Ts'o ext4_exit_xattr(); 4853c9de560dSAlex Tomas out2: 48545dabfc78STheodore Ts'o ext4_exit_mballoc(); 48556fd058f7STheodore Ts'o out3: 4856857ac889SLukas Czerner kfree(ext4_feat); 48576fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 48586fd058f7STheodore Ts'o kset_unregister(ext4_kset); 48596fd058f7STheodore Ts'o out4: 48605dabfc78STheodore Ts'o ext4_exit_system_zone(); 4861bd2d0210STheodore Ts'o out5: 48625dabfc78STheodore Ts'o ext4_exit_pageio(); 4863ac27a0ecSDave Kleikamp return err; 4864ac27a0ecSDave Kleikamp } 4865ac27a0ecSDave Kleikamp 48665dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 4867ac27a0ecSDave Kleikamp { 4868bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 486924b58424STheodore Ts'o unregister_as_ext2(); 487024b58424STheodore Ts'o unregister_as_ext3(); 487103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4872ac27a0ecSDave Kleikamp destroy_inodecache(); 48735dabfc78STheodore Ts'o ext4_exit_xattr(); 48745dabfc78STheodore Ts'o ext4_exit_mballoc(); 48759f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 48763197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 48775dabfc78STheodore Ts'o ext4_exit_system_zone(); 48785dabfc78STheodore Ts'o ext4_exit_pageio(); 4879ac27a0ecSDave Kleikamp } 4880ac27a0ecSDave Kleikamp 4881ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 488283982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4883ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 48845dabfc78STheodore Ts'o module_init(ext4_init_fs) 48855dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 4886