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/smp_lock.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 389f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 393197ebdbSTheodore Ts'o #include <linux/ctype.h> 401330593eSVignesh Babu #include <linux/log2.h> 41717d50e4SAndreas Dilger #include <linux/crc16.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 44bfff6873SLukas Czerner #include <linux/kthread.h> 45bfff6873SLukas Czerner #include <linux/freezer.h> 46bfff6873SLukas Czerner 473dcf5451SChristoph Hellwig #include "ext4.h" 483dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 49ac27a0ecSDave Kleikamp #include "xattr.h" 50ac27a0ecSDave Kleikamp #include "acl.h" 513661d286STheodore Ts'o #include "mballoc.h" 52ac27a0ecSDave Kleikamp 539bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 549bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 559bffad1eSTheodore Ts'o 569f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 573197ebdbSTheodore Ts'o static struct kset *ext4_kset; 58bfff6873SLukas Czerner struct ext4_lazy_init *ext4_li_info; 59bfff6873SLukas Czerner struct mutex ext4_li_mtx; 60*857ac889SLukas Czerner struct ext4_features *ext4_feat; 619f6200bbSTheodore Ts'o 62617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 63ac27a0ecSDave Kleikamp unsigned long journal_devnum); 64e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 65617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 66617ba13bSMingming Cao struct ext4_super_block *es); 67617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 70617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 71ac27a0ecSDave Kleikamp char nbuf[16]); 72617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 73617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 74c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 75617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 76c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 77ba69f9abSJan Kara static int ext4_get_sb(struct file_system_type *fs_type, int flags, 78ba69f9abSJan Kara const char *dev_name, void *data, struct vfsmount *mnt); 79bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 80bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 81ac27a0ecSDave Kleikamp 82ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 83ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 84ba69f9abSJan Kara .owner = THIS_MODULE, 85ba69f9abSJan Kara .name = "ext3", 86ba69f9abSJan Kara .get_sb = ext4_get_sb, 87ba69f9abSJan Kara .kill_sb = kill_block_super, 88ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 89ba69f9abSJan Kara }; 90ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 91ba69f9abSJan Kara #else 92ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 93ba69f9abSJan Kara #endif 94bd81d8eeSLaurent Vivier 958fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 968fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 97bd81d8eeSLaurent Vivier { 983a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 998fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1008fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 101bd81d8eeSLaurent Vivier } 102bd81d8eeSLaurent Vivier 1038fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1048fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 105bd81d8eeSLaurent Vivier { 1065272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1078fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1088fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 109bd81d8eeSLaurent Vivier } 110bd81d8eeSLaurent Vivier 1118fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1128fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 113bd81d8eeSLaurent Vivier { 1145272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1158fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1168fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 117bd81d8eeSLaurent Vivier } 118bd81d8eeSLaurent Vivier 119560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 120560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 121560671a0SAneesh Kumar K.V { 122560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 123560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 124560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 125560671a0SAneesh Kumar K.V } 126560671a0SAneesh Kumar K.V 127560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 128560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 129560671a0SAneesh Kumar K.V { 130560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 131560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 132560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 133560671a0SAneesh Kumar K.V } 134560671a0SAneesh Kumar K.V 135560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 136560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 137560671a0SAneesh Kumar K.V { 138560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 139560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 140560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 141560671a0SAneesh Kumar K.V } 142560671a0SAneesh Kumar K.V 143560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 144560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 145560671a0SAneesh Kumar K.V { 146560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 147560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 148560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 149560671a0SAneesh Kumar K.V } 150560671a0SAneesh Kumar K.V 1518fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1528fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 153bd81d8eeSLaurent Vivier { 1543a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1558fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1568fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 157bd81d8eeSLaurent Vivier } 158bd81d8eeSLaurent Vivier 1598fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1608fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 161bd81d8eeSLaurent Vivier { 1625272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1638fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1648fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 165bd81d8eeSLaurent Vivier } 166bd81d8eeSLaurent Vivier 1678fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1688fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 169bd81d8eeSLaurent Vivier { 1705272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1718fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1728fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 173bd81d8eeSLaurent Vivier } 174bd81d8eeSLaurent Vivier 175560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 176560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 177560671a0SAneesh Kumar K.V { 178560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 179560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 180560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 181560671a0SAneesh Kumar K.V } 182560671a0SAneesh Kumar K.V 183560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 184560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 185560671a0SAneesh Kumar K.V { 186560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 187560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 188560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 189560671a0SAneesh Kumar K.V } 190560671a0SAneesh Kumar K.V 191560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 192560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 193560671a0SAneesh Kumar K.V { 194560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 195560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 196560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 197560671a0SAneesh Kumar K.V } 198560671a0SAneesh Kumar K.V 199560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 200560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 201560671a0SAneesh Kumar K.V { 202560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 203560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 204560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 205560671a0SAneesh Kumar K.V } 206560671a0SAneesh Kumar K.V 207d3d1faf6SCurt Wohlgemuth 208d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 209d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 210d3d1faf6SCurt Wohlgemuth { 211d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 212d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 213d3d1faf6SCurt Wohlgemuth 214d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 215d3d1faf6SCurt Wohlgemuth 216d3d1faf6SCurt Wohlgemuth ref_cnt++; 217d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 218d3d1faf6SCurt Wohlgemuth 219d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 220d3d1faf6SCurt Wohlgemuth return handle; 221d3d1faf6SCurt Wohlgemuth } 222d3d1faf6SCurt Wohlgemuth 223d3d1faf6SCurt Wohlgemuth 224d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 225d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 226d3d1faf6SCurt Wohlgemuth { 227d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 228d3d1faf6SCurt Wohlgemuth 229d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 230d3d1faf6SCurt Wohlgemuth 231d3d1faf6SCurt Wohlgemuth ref_cnt--; 232d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 233d3d1faf6SCurt Wohlgemuth 234d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 235d3d1faf6SCurt Wohlgemuth } 236d3d1faf6SCurt Wohlgemuth 237ac27a0ecSDave Kleikamp /* 238dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 239ac27a0ecSDave Kleikamp * 240ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 241ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 242ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 243ac27a0ecSDave Kleikamp * appropriate. 244ac27a0ecSDave Kleikamp */ 245617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 246ac27a0ecSDave Kleikamp { 247ac27a0ecSDave Kleikamp journal_t *journal; 248ac27a0ecSDave Kleikamp 249ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 250ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 251ac27a0ecSDave Kleikamp 252437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 253ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 254ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 255ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 256617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2570390131bSFrank Mayhar if (journal) { 258ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 259c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 260ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 261ac27a0ecSDave Kleikamp } 262dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 263ac27a0ecSDave Kleikamp } 264d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2650390131bSFrank Mayhar } 266ac27a0ecSDave Kleikamp 267ac27a0ecSDave Kleikamp /* 268ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 269dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 270ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 271ac27a0ecSDave Kleikamp * appropriate. 272ac27a0ecSDave Kleikamp */ 273c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 274ac27a0ecSDave Kleikamp { 275ac27a0ecSDave Kleikamp struct super_block *sb; 276ac27a0ecSDave Kleikamp int err; 277ac27a0ecSDave Kleikamp int rc; 278ac27a0ecSDave Kleikamp 2790390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 280d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2810390131bSFrank Mayhar return 0; 2820390131bSFrank Mayhar } 283ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 284ac27a0ecSDave Kleikamp err = handle->h_err; 285dab291afSMingming Cao rc = jbd2_journal_stop(handle); 286ac27a0ecSDave Kleikamp 287ac27a0ecSDave Kleikamp if (!err) 288ac27a0ecSDave Kleikamp err = rc; 289ac27a0ecSDave Kleikamp if (err) 290c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 291ac27a0ecSDave Kleikamp return err; 292ac27a0ecSDave Kleikamp } 293ac27a0ecSDave Kleikamp 29490c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 29590c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 29690c7201bSTheodore Ts'o handle_t *handle, int err) 297ac27a0ecSDave Kleikamp { 298ac27a0ecSDave Kleikamp char nbuf[16]; 299617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 300ac27a0ecSDave Kleikamp 3010390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3020390131bSFrank Mayhar 303ac27a0ecSDave Kleikamp if (bh) 304ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 305ac27a0ecSDave Kleikamp 306ac27a0ecSDave Kleikamp if (!handle->h_err) 307ac27a0ecSDave Kleikamp handle->h_err = err; 308ac27a0ecSDave Kleikamp 309ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 310ac27a0ecSDave Kleikamp return; 311ac27a0ecSDave Kleikamp 31290c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 31390c7201bSTheodore Ts'o caller, line, errstr, err_fn); 314ac27a0ecSDave Kleikamp 315dab291afSMingming Cao jbd2_journal_abort_handle(handle); 316ac27a0ecSDave Kleikamp } 317ac27a0ecSDave Kleikamp 3181c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3191c13d5c0STheodore Ts'o unsigned int line) 3201c13d5c0STheodore Ts'o { 3211c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3221c13d5c0STheodore Ts'o 3231c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3241c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3251c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3261c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3271c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3281c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3291c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3301c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3311c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3321c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3331c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3341c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3351c13d5c0STheodore Ts'o } 33666e61a9eSTheodore Ts'o /* 33766e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33866e61a9eSTheodore Ts'o * started already 33966e61a9eSTheodore Ts'o */ 34066e61a9eSTheodore Ts'o if (!es->s_error_count) 34166e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 3421c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 3431c13d5c0STheodore Ts'o } 3441c13d5c0STheodore Ts'o 3451c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3461c13d5c0STheodore Ts'o unsigned int line) 3471c13d5c0STheodore Ts'o { 3481c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3491c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3501c13d5c0STheodore Ts'o } 3511c13d5c0STheodore Ts'o 3521c13d5c0STheodore Ts'o 353ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 354ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 355ac27a0ecSDave Kleikamp * 356ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 357617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 358ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 359ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 360ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 361ac27a0ecSDave Kleikamp * write out the superblock safely. 362ac27a0ecSDave Kleikamp * 363dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 364d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 365ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 366ac27a0ecSDave Kleikamp */ 367ac27a0ecSDave Kleikamp 368617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 369ac27a0ecSDave Kleikamp { 370ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 371ac27a0ecSDave Kleikamp return; 372ac27a0ecSDave Kleikamp 373ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 374617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 375ac27a0ecSDave Kleikamp 3764ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 377ac27a0ecSDave Kleikamp if (journal) 378dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 379ac27a0ecSDave Kleikamp } 380ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 381b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 382ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 383ac27a0ecSDave Kleikamp } 384ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 385617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 386ac27a0ecSDave Kleikamp sb->s_id); 387ac27a0ecSDave Kleikamp } 388ac27a0ecSDave Kleikamp 38912062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 390c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 391ac27a0ecSDave Kleikamp { 392ac27a0ecSDave Kleikamp va_list args; 393ac27a0ecSDave Kleikamp 394ac27a0ecSDave Kleikamp va_start(args, fmt); 395c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ", 396c398eda0STheodore Ts'o sb->s_id, function, line, current->comm); 397ac27a0ecSDave Kleikamp vprintk(fmt, args); 398ac27a0ecSDave Kleikamp printk("\n"); 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; 4091c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 410273df556SFrank Mayhar 4111c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4121c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4131c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 414273df556SFrank Mayhar va_start(args, fmt); 415c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 416c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 417c398eda0STheodore Ts'o if (block) 418c398eda0STheodore Ts'o printk("block %llu: ", block); 419c398eda0STheodore Ts'o printk("comm %s: ", current->comm); 420273df556SFrank Mayhar vprintk(fmt, args); 421273df556SFrank Mayhar printk("\n"); 422273df556SFrank Mayhar va_end(args); 423273df556SFrank Mayhar 424273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 425273df556SFrank Mayhar } 426273df556SFrank Mayhar 427c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 428c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 429273df556SFrank Mayhar { 430273df556SFrank Mayhar va_list args; 4311c13d5c0STheodore Ts'o struct ext4_super_block *es; 432273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 433273df556SFrank Mayhar char pathname[80], *path; 434273df556SFrank Mayhar 4351c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4361c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4371c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 438273df556SFrank Mayhar va_start(args, fmt); 439273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 440273df556SFrank Mayhar if (!path) 441273df556SFrank Mayhar path = "(unknown)"; 442273df556SFrank Mayhar printk(KERN_CRIT 443c398eda0STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu " 444c398eda0STheodore Ts'o "(comm %s path %s): ", 445c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino, 446c398eda0STheodore Ts'o current->comm, path); 447273df556SFrank Mayhar vprintk(fmt, args); 448273df556SFrank Mayhar printk("\n"); 449273df556SFrank Mayhar va_end(args); 450273df556SFrank Mayhar 451273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 452273df556SFrank Mayhar } 453273df556SFrank Mayhar 454617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 455ac27a0ecSDave Kleikamp char nbuf[16]) 456ac27a0ecSDave Kleikamp { 457ac27a0ecSDave Kleikamp char *errstr = NULL; 458ac27a0ecSDave Kleikamp 459ac27a0ecSDave Kleikamp switch (errno) { 460ac27a0ecSDave Kleikamp case -EIO: 461ac27a0ecSDave Kleikamp errstr = "IO failure"; 462ac27a0ecSDave Kleikamp break; 463ac27a0ecSDave Kleikamp case -ENOMEM: 464ac27a0ecSDave Kleikamp errstr = "Out of memory"; 465ac27a0ecSDave Kleikamp break; 466ac27a0ecSDave Kleikamp case -EROFS: 46778f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 46878f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 469ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 470ac27a0ecSDave Kleikamp else 471ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 472ac27a0ecSDave Kleikamp break; 473ac27a0ecSDave Kleikamp default: 474ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 475ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 476ac27a0ecSDave Kleikamp * NULL. */ 477ac27a0ecSDave Kleikamp if (nbuf) { 478ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 479ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 480ac27a0ecSDave Kleikamp errstr = nbuf; 481ac27a0ecSDave Kleikamp } 482ac27a0ecSDave Kleikamp break; 483ac27a0ecSDave Kleikamp } 484ac27a0ecSDave Kleikamp 485ac27a0ecSDave Kleikamp return errstr; 486ac27a0ecSDave Kleikamp } 487ac27a0ecSDave Kleikamp 488617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 489ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 490ac27a0ecSDave Kleikamp 491c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 492c398eda0STheodore Ts'o unsigned int line, int errno) 493ac27a0ecSDave Kleikamp { 494ac27a0ecSDave Kleikamp char nbuf[16]; 495ac27a0ecSDave Kleikamp const char *errstr; 496ac27a0ecSDave Kleikamp 497ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 498ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 499ac27a0ecSDave Kleikamp * an error. */ 500ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 501ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 502ac27a0ecSDave Kleikamp return; 503ac27a0ecSDave Kleikamp 504617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 505c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 506c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5071c13d5c0STheodore Ts'o save_error_info(sb, function, line); 508ac27a0ecSDave Kleikamp 509617ba13bSMingming Cao ext4_handle_error(sb); 510ac27a0ecSDave Kleikamp } 511ac27a0ecSDave Kleikamp 512ac27a0ecSDave Kleikamp /* 513617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 514ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 515ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 516ac27a0ecSDave Kleikamp * 517ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 518ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 519ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 520ac27a0ecSDave Kleikamp */ 521ac27a0ecSDave Kleikamp 522c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 523c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 524ac27a0ecSDave Kleikamp { 525ac27a0ecSDave Kleikamp va_list args; 526ac27a0ecSDave Kleikamp 5271c13d5c0STheodore Ts'o save_error_info(sb, function, line); 528ac27a0ecSDave Kleikamp va_start(args, fmt); 529c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 530c398eda0STheodore Ts'o function, line); 531ac27a0ecSDave Kleikamp vprintk(fmt, args); 532ac27a0ecSDave Kleikamp printk("\n"); 533ac27a0ecSDave Kleikamp va_end(args); 534ac27a0ecSDave Kleikamp 5351c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 536b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 537ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5384ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 539ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 540dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5411c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5421c13d5c0STheodore Ts'o } 5431c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5441c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 545ac27a0ecSDave Kleikamp } 546ac27a0ecSDave Kleikamp 547b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 548b31e1552SEric Sandeen const char *fmt, ...) 549b31e1552SEric Sandeen { 550b31e1552SEric Sandeen va_list args; 551b31e1552SEric Sandeen 552b31e1552SEric Sandeen va_start(args, fmt); 553b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 554b31e1552SEric Sandeen vprintk(fmt, args); 555b31e1552SEric Sandeen printk("\n"); 556b31e1552SEric Sandeen va_end(args); 557b31e1552SEric Sandeen } 558b31e1552SEric Sandeen 55912062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 560c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 561ac27a0ecSDave Kleikamp { 562ac27a0ecSDave Kleikamp va_list args; 563ac27a0ecSDave Kleikamp 564ac27a0ecSDave Kleikamp va_start(args, fmt); 565c398eda0STheodore Ts'o printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ", 566c398eda0STheodore Ts'o sb->s_id, function, line); 567ac27a0ecSDave Kleikamp vprintk(fmt, args); 568ac27a0ecSDave Kleikamp printk("\n"); 569ac27a0ecSDave Kleikamp va_end(args); 570ac27a0ecSDave Kleikamp } 571ac27a0ecSDave Kleikamp 572e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 573e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 574e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 575e29136f8STheodore Ts'o const char *fmt, ...) 5765d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5775d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5785d1b1b3fSAneesh Kumar K.V { 5795d1b1b3fSAneesh Kumar K.V va_list args; 5805d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5815d1b1b3fSAneesh Kumar K.V 5821c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 5831c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5841c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 5855d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 586e29136f8STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", 587e29136f8STheodore Ts'o sb->s_id, function, line, grp); 588e29136f8STheodore Ts'o if (ino) 589e29136f8STheodore Ts'o printk("inode %lu: ", ino); 590e29136f8STheodore Ts'o if (block) 591e29136f8STheodore Ts'o printk("block %llu:", (unsigned long long) block); 5925d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 5935d1b1b3fSAneesh Kumar K.V printk("\n"); 5945d1b1b3fSAneesh Kumar K.V va_end(args); 5955d1b1b3fSAneesh Kumar K.V 5965d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 597e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 5985d1b1b3fSAneesh Kumar K.V return; 5995d1b1b3fSAneesh Kumar K.V } 6001c13d5c0STheodore Ts'o 6015d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6025d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6035d1b1b3fSAneesh Kumar K.V /* 6045d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6055d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6065d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6075d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6085d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 6095d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 6105d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6115d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6125d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6135d1b1b3fSAneesh Kumar K.V */ 6145d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6155d1b1b3fSAneesh Kumar K.V return; 6165d1b1b3fSAneesh Kumar K.V } 6175d1b1b3fSAneesh Kumar K.V 618617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 619ac27a0ecSDave Kleikamp { 620617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 621ac27a0ecSDave Kleikamp 622617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 623ac27a0ecSDave Kleikamp return; 624ac27a0ecSDave Kleikamp 62512062dddSEric Sandeen ext4_warning(sb, 626ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 627ac27a0ecSDave Kleikamp "running e2fsck is recommended", 628617ba13bSMingming Cao EXT4_DYNAMIC_REV); 629ac27a0ecSDave Kleikamp 630617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 631617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 632617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 633ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 634ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 635ac27a0ecSDave Kleikamp 636ac27a0ecSDave Kleikamp /* 637ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 638ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 639ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 640ac27a0ecSDave Kleikamp */ 641ac27a0ecSDave Kleikamp } 642ac27a0ecSDave Kleikamp 643ac27a0ecSDave Kleikamp /* 644ac27a0ecSDave Kleikamp * Open the external journal device 645ac27a0ecSDave Kleikamp */ 646b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 647ac27a0ecSDave Kleikamp { 648ac27a0ecSDave Kleikamp struct block_device *bdev; 649ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 650ac27a0ecSDave Kleikamp 651ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 652ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 653ac27a0ecSDave Kleikamp goto fail; 654ac27a0ecSDave Kleikamp return bdev; 655ac27a0ecSDave Kleikamp 656ac27a0ecSDave Kleikamp fail: 657b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 658ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 659ac27a0ecSDave Kleikamp return NULL; 660ac27a0ecSDave Kleikamp } 661ac27a0ecSDave Kleikamp 662ac27a0ecSDave Kleikamp /* 663ac27a0ecSDave Kleikamp * Release the journal device 664ac27a0ecSDave Kleikamp */ 665617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 666ac27a0ecSDave Kleikamp { 667ac27a0ecSDave Kleikamp bd_release(bdev); 6689a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 669ac27a0ecSDave Kleikamp } 670ac27a0ecSDave Kleikamp 671617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 672ac27a0ecSDave Kleikamp { 673ac27a0ecSDave Kleikamp struct block_device *bdev; 674ac27a0ecSDave Kleikamp int ret = -ENODEV; 675ac27a0ecSDave Kleikamp 676ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 677ac27a0ecSDave Kleikamp if (bdev) { 678617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 679ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 680ac27a0ecSDave Kleikamp } 681ac27a0ecSDave Kleikamp return ret; 682ac27a0ecSDave Kleikamp } 683ac27a0ecSDave Kleikamp 684ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 685ac27a0ecSDave Kleikamp { 686617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 687ac27a0ecSDave Kleikamp } 688ac27a0ecSDave Kleikamp 689617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 690ac27a0ecSDave Kleikamp { 691ac27a0ecSDave Kleikamp struct list_head *l; 692ac27a0ecSDave Kleikamp 693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 694ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 695ac27a0ecSDave Kleikamp 696ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 697ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 698ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 699ac27a0ecSDave Kleikamp printk(KERN_ERR " " 700ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 701ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 702ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 703ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 704ac27a0ecSDave Kleikamp } 705ac27a0ecSDave Kleikamp } 706ac27a0ecSDave Kleikamp 707617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 708ac27a0ecSDave Kleikamp { 709617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 710617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 711ef2cabf7SHidehiro Kawai int i, err; 712ac27a0ecSDave Kleikamp 713*857ac889SLukas Czerner ext4_unregister_li_request(sb); 714e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 715e0ccfd95SChristoph Hellwig 7164c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7174c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7184c0425ffSMingming Cao 719a9e220f8SAl Viro lock_super(sb); 7206cfd0148SChristoph Hellwig lock_kernel(); 7218c85e125SChristoph Hellwig if (sb->s_dirt) 722ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 7238c85e125SChristoph Hellwig 7240390131bSFrank Mayhar if (sbi->s_journal) { 725ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 72647b4a50bSJan Kara sbi->s_journal = NULL; 727ef2cabf7SHidehiro Kawai if (err < 0) 728c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7290390131bSFrank Mayhar } 730d4edac31SJosef Bacik 731a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 732d4edac31SJosef Bacik ext4_release_system_zone(sb); 733d4edac31SJosef Bacik ext4_mb_release(sb); 734d4edac31SJosef Bacik ext4_ext_release(sb); 735d4edac31SJosef Bacik ext4_xattr_put_super(sb); 736d4edac31SJosef Bacik 737ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 738617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 739ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 740e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 741ac27a0ecSDave Kleikamp } 742240799cdSTheodore Ts'o if (sbi->s_proc) { 7439f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 744240799cdSTheodore Ts'o } 7453197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 746ac27a0ecSDave Kleikamp 747ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 748ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 749ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 750c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 751c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 752c5ca7c76STheodore Ts'o else 753772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 754ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 755ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 756ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 7576bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 758ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 759ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 760ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 761ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 762ac27a0ecSDave Kleikamp #endif 763ac27a0ecSDave Kleikamp 764ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 765ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 766ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 767ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 768ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 769ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 770ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 771ac27a0ecSDave Kleikamp 772f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 773ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 774ac27a0ecSDave Kleikamp /* 775ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 776ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 777ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 778ac27a0ecSDave Kleikamp */ 779ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 780f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 781617ba13bSMingming Cao ext4_blkdev_remove(sbi); 782ac27a0ecSDave Kleikamp } 783ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7843197ebdbSTheodore Ts'o /* 7853197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7863197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7873197ebdbSTheodore Ts'o */ 7883197ebdbSTheodore Ts'o unlock_kernel(); 7893197ebdbSTheodore Ts'o unlock_super(sb); 7903197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7913197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 792705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 793ac27a0ecSDave Kleikamp kfree(sbi); 794ac27a0ecSDave Kleikamp } 795ac27a0ecSDave Kleikamp 796e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 797ac27a0ecSDave Kleikamp 798ac27a0ecSDave Kleikamp /* 799ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 800ac27a0ecSDave Kleikamp */ 801617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 802ac27a0ecSDave Kleikamp { 803617ba13bSMingming Cao struct ext4_inode_info *ei; 804ac27a0ecSDave Kleikamp 805e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 806ac27a0ecSDave Kleikamp if (!ei) 807ac27a0ecSDave Kleikamp return NULL; 8080b8e58a1SAndreas Dilger 809ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 81091246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 811a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 812c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 813c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8140390131bSFrank Mayhar /* 8150390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 8160390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 8170390131bSFrank Mayhar * jinode. 8180390131bSFrank Mayhar */ 819678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 820d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 821d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 822d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8239d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 824d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 825d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 826a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 827a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 828a9e7f447SDmitry Monakhov #endif 829c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 830744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 8318d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 832b436b9beSJan Kara ei->i_sync_tid = 0; 833b436b9beSJan Kara ei->i_datasync_tid = 0; 8340b8e58a1SAndreas Dilger 835ac27a0ecSDave Kleikamp return &ei->vfs_inode; 836ac27a0ecSDave Kleikamp } 837ac27a0ecSDave Kleikamp 838617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 839ac27a0ecSDave Kleikamp { 8409f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 841b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 842b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 843b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 8449f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 8459f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 8469f7dd93dSVasily Averin true); 8479f7dd93dSVasily Averin dump_stack(); 8489f7dd93dSVasily Averin } 849617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 850ac27a0ecSDave Kleikamp } 851ac27a0ecSDave Kleikamp 85251cc5068SAlexey Dobriyan static void init_once(void *foo) 853ac27a0ecSDave Kleikamp { 854617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 855ac27a0ecSDave Kleikamp 856ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 85703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 858ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 859ac27a0ecSDave Kleikamp #endif 8600e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 861ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 862ac27a0ecSDave Kleikamp } 863ac27a0ecSDave Kleikamp 864ac27a0ecSDave Kleikamp static int init_inodecache(void) 865ac27a0ecSDave Kleikamp { 866617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 867617ba13bSMingming Cao sizeof(struct ext4_inode_info), 868ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 869ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 87020c2df83SPaul Mundt init_once); 871617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 872ac27a0ecSDave Kleikamp return -ENOMEM; 873ac27a0ecSDave Kleikamp return 0; 874ac27a0ecSDave Kleikamp } 875ac27a0ecSDave Kleikamp 876ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 877ac27a0ecSDave Kleikamp { 878617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 879ac27a0ecSDave Kleikamp } 880ac27a0ecSDave Kleikamp 8810930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 882ac27a0ecSDave Kleikamp { 8830930fcc1SAl Viro invalidate_inode_buffers(inode); 8840930fcc1SAl Viro end_writeback(inode); 8859f754758SChristoph Hellwig dquot_drop(inode); 886c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 8870390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 888678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 889678aaf48SJan Kara &EXT4_I(inode)->jinode); 890ac27a0ecSDave Kleikamp } 891ac27a0ecSDave Kleikamp 8922b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 8932b2d6d01STheodore Ts'o struct super_block *sb) 894ac27a0ecSDave Kleikamp { 895ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 896617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 897ac27a0ecSDave Kleikamp 8985a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 8995a20bdfcSJan Kara char *fmtname = ""; 9005a20bdfcSJan Kara 9015a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 9025a20bdfcSJan Kara case QFMT_VFS_OLD: 9035a20bdfcSJan Kara fmtname = "vfsold"; 9045a20bdfcSJan Kara break; 9055a20bdfcSJan Kara case QFMT_VFS_V0: 9065a20bdfcSJan Kara fmtname = "vfsv0"; 9075a20bdfcSJan Kara break; 9085a20bdfcSJan Kara case QFMT_VFS_V1: 9095a20bdfcSJan Kara fmtname = "vfsv1"; 9105a20bdfcSJan Kara break; 9115a20bdfcSJan Kara } 9125a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 9135a20bdfcSJan Kara } 914ac27a0ecSDave Kleikamp 915ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 916ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 917ac27a0ecSDave Kleikamp 918ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 919ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 920ac27a0ecSDave Kleikamp 921482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 922ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 923ac27a0ecSDave Kleikamp 924482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 925ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 926ac27a0ecSDave Kleikamp #endif 927ac27a0ecSDave Kleikamp } 928ac27a0ecSDave Kleikamp 929d9c9bef1SMiklos Szeredi /* 930d9c9bef1SMiklos Szeredi * Show an option if 931d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 932d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 933d9c9bef1SMiklos Szeredi */ 934617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 935ac27a0ecSDave Kleikamp { 936aa22df2cSAneesh Kumar K.V int def_errors; 937aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 938ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 939d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 940d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 941d9c9bef1SMiklos Szeredi 942d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 943aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 944d9c9bef1SMiklos Szeredi 945d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 946d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 947d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 948d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 949aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 950d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 951d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 952d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 953d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 954d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 955d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 956d9c9bef1SMiklos Szeredi } 957d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 958d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 959d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 960d9c9bef1SMiklos Szeredi } 961bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 962d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 963bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 964d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 965bb4f397aSAneesh Kumar K.V } 966bb4f397aSAneesh Kumar K.V } 967aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 968bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 969aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 970d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 971aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 972d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 973aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 974d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 975d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 976d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 97703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 978aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 979aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 980d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 981d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 982d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 983d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 984d9c9bef1SMiklos Szeredi } 985d9c9bef1SMiklos Szeredi #endif 98603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 987aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 988d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 989d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 990d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 991d9c9bef1SMiklos Szeredi #endif 99230773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 993d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 994d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 995d9c9bef1SMiklos Szeredi } 99630773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 99730773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 99830773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 99930773840STheodore Ts'o } 100030773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 100130773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 100230773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 100330773840STheodore Ts'o } 100430773840STheodore Ts'o 1005571640caSEric Sandeen /* 1006571640caSEric Sandeen * We're changing the default of barrier mount option, so 1007571640caSEric Sandeen * let's always display its mount state so it's clear what its 1008571640caSEric Sandeen * status is. 1009571640caSEric Sandeen */ 1010571640caSEric Sandeen seq_puts(seq, ",barrier="); 1011571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1012cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1013cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 101439a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 101539a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 101625ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 101725ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 10188b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 10198b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1020dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1021dd919b98SAneesh Kumar K.V 1022cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1023cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1024aa22df2cSAneesh Kumar K.V /* 1025aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1026aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1027aa22df2cSAneesh Kumar K.V */ 1028617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1029ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1030617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1031ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1032617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1033ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1034ac27a0ecSDave Kleikamp 1035240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1036240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1037240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1038240799cdSTheodore Ts'o 10395bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 10405bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 10415bf5683aSHidehiro Kawai 1042afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 104306705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1044afd4672dSTheodore Ts'o 10458b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 10465328e635SEric Sandeen seq_puts(seq, ",discard"); 10475328e635SEric Sandeen 1048e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1049e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1050e3bb52aeSEric Sandeen 1051744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1052744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1053744692dcSJiaying Zhang 10548b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 10558b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 10568b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 10578b67f04aSTheodore Ts'o 1058bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1059bfff6873SLukas Czerner seq_puts(seq, ",noinit_inode_table"); 1060bfff6873SLukas Czerner else if (sbi->s_li_wait_mult) 1061bfff6873SLukas Czerner seq_printf(seq, ",init_inode_table=%u", 1062bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1063bfff6873SLukas Czerner 1064617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 10650b8e58a1SAndreas Dilger 1066ac27a0ecSDave Kleikamp return 0; 1067ac27a0ecSDave Kleikamp } 1068ac27a0ecSDave Kleikamp 10691b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10701b961ac0SChristoph Hellwig u64 ino, u32 generation) 1071ac27a0ecSDave Kleikamp { 1072ac27a0ecSDave Kleikamp struct inode *inode; 1073ac27a0ecSDave Kleikamp 1074617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1075ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1076617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1077ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1078ac27a0ecSDave Kleikamp 1079ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1080ac27a0ecSDave Kleikamp * 1081617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1082ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1083ac27a0ecSDave Kleikamp * 1084ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1085ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1086ac27a0ecSDave Kleikamp */ 10871d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10881d1fe1eeSDavid Howells if (IS_ERR(inode)) 10891d1fe1eeSDavid Howells return ERR_CAST(inode); 10901d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1091ac27a0ecSDave Kleikamp iput(inode); 1092ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1093ac27a0ecSDave Kleikamp } 10941b961ac0SChristoph Hellwig 10951b961ac0SChristoph Hellwig return inode; 1096ac27a0ecSDave Kleikamp } 10971b961ac0SChristoph Hellwig 10981b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10991b961ac0SChristoph Hellwig int fh_len, int fh_type) 11001b961ac0SChristoph Hellwig { 11011b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11021b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11031b961ac0SChristoph Hellwig } 11041b961ac0SChristoph Hellwig 11051b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11061b961ac0SChristoph Hellwig int fh_len, int fh_type) 11071b961ac0SChristoph Hellwig { 11081b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11091b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1110ac27a0ecSDave Kleikamp } 1111ac27a0ecSDave Kleikamp 1112c39a7f84SToshiyuki Okajima /* 1113c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1114c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1115c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1116c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1117c39a7f84SToshiyuki Okajima */ 11180b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11190b8e58a1SAndreas Dilger gfp_t wait) 1120c39a7f84SToshiyuki Okajima { 1121c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1122c39a7f84SToshiyuki Okajima 1123c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1124c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1125c39a7f84SToshiyuki Okajima return 0; 1126c39a7f84SToshiyuki Okajima if (journal) 1127c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1128c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1129c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1130c39a7f84SToshiyuki Okajima } 1131c39a7f84SToshiyuki Okajima 1132ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1133ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1134ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1135ac27a0ecSDave Kleikamp 1136617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1137617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1138617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1139617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1140617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11416f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1142307ae18aSChristoph Hellwig char *path); 1143ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1144617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1145617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1146ac27a0ecSDave Kleikamp size_t len, loff_t off); 1147617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1148ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1149ac27a0ecSDave Kleikamp 115061e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1151a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 115260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1153a9e7f447SDmitry Monakhov #endif 1154617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1155617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1156617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1157617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1158a5b5ee32SJan Kara .write_info = ext4_write_info, 1159a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1160a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1161ac27a0ecSDave Kleikamp }; 1162ac27a0ecSDave Kleikamp 11630d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1164617ba13bSMingming Cao .quota_on = ext4_quota_on, 1165ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1166287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1167287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1168287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1169287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1170287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1171ac27a0ecSDave Kleikamp }; 1172ac27a0ecSDave Kleikamp #endif 1173ac27a0ecSDave Kleikamp 1174ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1175617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1176617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1177617ba13bSMingming Cao .write_inode = ext4_write_inode, 1178617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11790930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1180617ba13bSMingming Cao .put_super = ext4_put_super, 1181617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1182c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1183c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1184617ba13bSMingming Cao .statfs = ext4_statfs, 1185617ba13bSMingming Cao .remount_fs = ext4_remount, 1186617ba13bSMingming Cao .show_options = ext4_show_options, 1187ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1188617ba13bSMingming Cao .quota_read = ext4_quota_read, 1189617ba13bSMingming Cao .quota_write = ext4_quota_write, 1190ac27a0ecSDave Kleikamp #endif 1191c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1192ac27a0ecSDave Kleikamp }; 1193ac27a0ecSDave Kleikamp 11949ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11959ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11969ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11979ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11989ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11990930fcc1SAl Viro .evict_inode = ext4_evict_inode, 12009ca92389STheodore Ts'o .write_super = ext4_write_super, 12019ca92389STheodore Ts'o .put_super = ext4_put_super, 12029ca92389STheodore Ts'o .statfs = ext4_statfs, 12039ca92389STheodore Ts'o .remount_fs = ext4_remount, 12049ca92389STheodore Ts'o .show_options = ext4_show_options, 12059ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12069ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12079ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12089ca92389STheodore Ts'o #endif 12099ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12109ca92389STheodore Ts'o }; 12119ca92389STheodore Ts'o 121239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12131b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12141b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1215617ba13bSMingming Cao .get_parent = ext4_get_parent, 1216ac27a0ecSDave Kleikamp }; 1217ac27a0ecSDave Kleikamp 1218ac27a0ecSDave Kleikamp enum { 1219ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1220ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 122101436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1222ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 122306705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 122430773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1225c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1226818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1227ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1228296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1229ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12305a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 12315a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 12325a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 123301436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 12346fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 12355328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1236744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 12375328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1238bfff6873SLukas Czerner Opt_init_inode_table, Opt_noinit_inode_table, 1239ac27a0ecSDave Kleikamp }; 1240ac27a0ecSDave Kleikamp 1241a447c093SSteven Whitehouse static const match_table_t tokens = { 1242ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1243ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1244ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1245ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1246ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1247ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1248ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1249ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1250ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1251ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1252ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1253ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1254ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1255ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1256ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1257ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1258ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1259ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1260ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1261ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1262ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1263e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1264ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1265ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1266ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 126730773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 126830773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1269ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1270ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1271818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1272818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1273ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1274ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1275ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1276ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12775bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12785bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1279ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1280ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1281ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1282ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1283ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1284ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12855a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1286ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1287ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1288ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1289ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1290ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 129106705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 129206705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 129325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1294c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1295ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 129664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1297dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12986fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12996fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1300240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1301b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1302afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 130306705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 130406705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1305744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1306744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13075328e635SEric Sandeen {Opt_discard, "discard"}, 13085328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1309bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable=%u"}, 1310bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable"}, 1311bfff6873SLukas Czerner {Opt_noinit_inode_table, "noinit_itable"}, 1312f3f12faaSJosef Bacik {Opt_err, NULL}, 1313ac27a0ecSDave Kleikamp }; 1314ac27a0ecSDave Kleikamp 1315617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1316ac27a0ecSDave Kleikamp { 1317617ba13bSMingming Cao ext4_fsblk_t sb_block; 1318ac27a0ecSDave Kleikamp char *options = (char *) *data; 1319ac27a0ecSDave Kleikamp 1320ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1321ac27a0ecSDave Kleikamp return 1; /* Default location */ 13220b8e58a1SAndreas Dilger 1323ac27a0ecSDave Kleikamp options += 3; 13240b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1325ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1326ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13274776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1328ac27a0ecSDave Kleikamp (char *) *data); 1329ac27a0ecSDave Kleikamp return 1; 1330ac27a0ecSDave Kleikamp } 1331ac27a0ecSDave Kleikamp if (*options == ',') 1332ac27a0ecSDave Kleikamp options++; 1333ac27a0ecSDave Kleikamp *data = (void *) options; 13340b8e58a1SAndreas Dilger 1335ac27a0ecSDave Kleikamp return sb_block; 1336ac27a0ecSDave Kleikamp } 1337ac27a0ecSDave Kleikamp 1338b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1339437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1340437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1341b3881f74STheodore Ts'o 134256c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 134356c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 134456c50f11SDmitry Monakhov { 134556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 134656c50f11SDmitry Monakhov char *qname; 134756c50f11SDmitry Monakhov 134856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 134956c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 135056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135156c50f11SDmitry Monakhov "Cannot change journaled " 135256c50f11SDmitry Monakhov "quota options when quota turned on"); 135356c50f11SDmitry Monakhov return 0; 135456c50f11SDmitry Monakhov } 135556c50f11SDmitry Monakhov qname = match_strdup(args); 135656c50f11SDmitry Monakhov if (!qname) { 135756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135856c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 135956c50f11SDmitry Monakhov return 0; 136056c50f11SDmitry Monakhov } 136156c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 136256c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 136356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 136456c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 136556c50f11SDmitry Monakhov kfree(qname); 136656c50f11SDmitry Monakhov return 0; 136756c50f11SDmitry Monakhov } 136856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 136956c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 137056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137156c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 137256c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 137356c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 137456c50f11SDmitry Monakhov return 0; 137556c50f11SDmitry Monakhov } 137656c50f11SDmitry Monakhov set_opt(sbi->s_mount_opt, QUOTA); 137756c50f11SDmitry Monakhov return 1; 137856c50f11SDmitry Monakhov } 137956c50f11SDmitry Monakhov 138056c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 138156c50f11SDmitry Monakhov { 138256c50f11SDmitry Monakhov 138356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 138456c50f11SDmitry Monakhov 138556c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 138656c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 138756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 138856c50f11SDmitry Monakhov " when quota turned on"); 138956c50f11SDmitry Monakhov return 0; 139056c50f11SDmitry Monakhov } 139156c50f11SDmitry Monakhov /* 139256c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 139356c50f11SDmitry Monakhov * to be correct 139456c50f11SDmitry Monakhov */ 139556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 139656c50f11SDmitry Monakhov return 1; 139756c50f11SDmitry Monakhov } 139856c50f11SDmitry Monakhov #endif 139956c50f11SDmitry Monakhov 1400ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1401c3191067STheodore Ts'o unsigned long *journal_devnum, 1402b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1403617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1404ac27a0ecSDave Kleikamp { 1405617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1406ac27a0ecSDave Kleikamp char *p; 1407ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1408ac27a0ecSDave Kleikamp int data_opt = 0; 1409ac27a0ecSDave Kleikamp int option; 1410ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 141156c50f11SDmitry Monakhov int qfmt; 1412ac27a0ecSDave Kleikamp #endif 1413ac27a0ecSDave Kleikamp 1414ac27a0ecSDave Kleikamp if (!options) 1415ac27a0ecSDave Kleikamp return 1; 1416ac27a0ecSDave Kleikamp 1417ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1418ac27a0ecSDave Kleikamp int token; 1419ac27a0ecSDave Kleikamp if (!*p) 1420ac27a0ecSDave Kleikamp continue; 1421ac27a0ecSDave Kleikamp 142215121c18SEric Sandeen /* 142315121c18SEric Sandeen * Initialize args struct so we know whether arg was 142415121c18SEric Sandeen * found; some options take optional arguments. 142515121c18SEric Sandeen */ 142615121c18SEric Sandeen args[0].to = args[0].from = 0; 1427ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1428ac27a0ecSDave Kleikamp switch (token) { 1429ac27a0ecSDave Kleikamp case Opt_bsd_df: 1430437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1431ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1432ac27a0ecSDave Kleikamp break; 1433ac27a0ecSDave Kleikamp case Opt_minix_df: 1434437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1435ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1436437ca0fdSDmitry Monakhov 1437ac27a0ecSDave Kleikamp break; 1438ac27a0ecSDave Kleikamp case Opt_grpid: 1439437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1440ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1441437ca0fdSDmitry Monakhov 1442ac27a0ecSDave Kleikamp break; 1443ac27a0ecSDave Kleikamp case Opt_nogrpid: 1444437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1445ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1446437ca0fdSDmitry Monakhov 1447ac27a0ecSDave Kleikamp break; 1448ac27a0ecSDave Kleikamp case Opt_resuid: 1449ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1450ac27a0ecSDave Kleikamp return 0; 1451ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1452ac27a0ecSDave Kleikamp break; 1453ac27a0ecSDave Kleikamp case Opt_resgid: 1454ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1455ac27a0ecSDave Kleikamp return 0; 1456ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1457ac27a0ecSDave Kleikamp break; 1458ac27a0ecSDave Kleikamp case Opt_sb: 1459ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1460ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1461ac27a0ecSDave Kleikamp break; 1462ac27a0ecSDave Kleikamp case Opt_err_panic: 1463ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1464ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1465ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1466ac27a0ecSDave Kleikamp break; 1467ac27a0ecSDave Kleikamp case Opt_err_ro: 1468ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1469ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1470ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1471ac27a0ecSDave Kleikamp break; 1472ac27a0ecSDave Kleikamp case Opt_err_cont: 1473ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1474ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1475ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1476ac27a0ecSDave Kleikamp break; 1477ac27a0ecSDave Kleikamp case Opt_nouid32: 1478ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1479ac27a0ecSDave Kleikamp break; 1480ac27a0ecSDave Kleikamp case Opt_debug: 1481ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1482ac27a0ecSDave Kleikamp break; 1483ac27a0ecSDave Kleikamp case Opt_oldalloc: 1484ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1485ac27a0ecSDave Kleikamp break; 1486ac27a0ecSDave Kleikamp case Opt_orlov: 1487ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1488ac27a0ecSDave Kleikamp break; 148903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1490ac27a0ecSDave Kleikamp case Opt_user_xattr: 1491ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1492ac27a0ecSDave Kleikamp break; 1493ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1494ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1495ac27a0ecSDave Kleikamp break; 1496ac27a0ecSDave Kleikamp #else 1497ac27a0ecSDave Kleikamp case Opt_user_xattr: 1498ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1500ac27a0ecSDave Kleikamp break; 1501ac27a0ecSDave Kleikamp #endif 150203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1503ac27a0ecSDave Kleikamp case Opt_acl: 1504ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1505ac27a0ecSDave Kleikamp break; 1506ac27a0ecSDave Kleikamp case Opt_noacl: 1507ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1508ac27a0ecSDave Kleikamp break; 1509ac27a0ecSDave Kleikamp #else 1510ac27a0ecSDave Kleikamp case Opt_acl: 1511ac27a0ecSDave Kleikamp case Opt_noacl: 1512b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1513ac27a0ecSDave Kleikamp break; 1514ac27a0ecSDave Kleikamp #endif 1515ac27a0ecSDave Kleikamp case Opt_journal_update: 1516ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1517ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1518ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1519ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1520ac27a0ecSDave Kleikamp journal file. */ 1521ac27a0ecSDave Kleikamp if (is_remount) { 1522b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1523b31e1552SEric Sandeen "Cannot specify journal on remount"); 1524ac27a0ecSDave Kleikamp return 0; 1525ac27a0ecSDave Kleikamp } 1526ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1527ac27a0ecSDave Kleikamp break; 1528ac27a0ecSDave Kleikamp case Opt_journal_dev: 1529ac27a0ecSDave Kleikamp if (is_remount) { 1530b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1531b31e1552SEric Sandeen "Cannot specify journal on remount"); 1532ac27a0ecSDave Kleikamp return 0; 1533ac27a0ecSDave Kleikamp } 1534ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1535ac27a0ecSDave Kleikamp return 0; 1536ac27a0ecSDave Kleikamp *journal_devnum = option; 1537ac27a0ecSDave Kleikamp break; 1538818d276cSGirish Shilamkar case Opt_journal_checksum: 1539d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1540d4da6c9cSLinus Torvalds break; 1541818d276cSGirish Shilamkar case Opt_journal_async_commit: 1542818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1543d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1544818d276cSGirish Shilamkar break; 1545ac27a0ecSDave Kleikamp case Opt_noload: 1546ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1547ac27a0ecSDave Kleikamp break; 1548ac27a0ecSDave Kleikamp case Opt_commit: 1549ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1550ac27a0ecSDave Kleikamp return 0; 1551ac27a0ecSDave Kleikamp if (option < 0) 1552ac27a0ecSDave Kleikamp return 0; 1553ac27a0ecSDave Kleikamp if (option == 0) 1554cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1555ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1556ac27a0ecSDave Kleikamp break; 155730773840STheodore Ts'o case Opt_max_batch_time: 155830773840STheodore Ts'o if (match_int(&args[0], &option)) 155930773840STheodore Ts'o return 0; 156030773840STheodore Ts'o if (option < 0) 156130773840STheodore Ts'o return 0; 156230773840STheodore Ts'o if (option == 0) 156330773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 156430773840STheodore Ts'o sbi->s_max_batch_time = option; 156530773840STheodore Ts'o break; 156630773840STheodore Ts'o case Opt_min_batch_time: 156730773840STheodore Ts'o if (match_int(&args[0], &option)) 156830773840STheodore Ts'o return 0; 156930773840STheodore Ts'o if (option < 0) 157030773840STheodore Ts'o return 0; 157130773840STheodore Ts'o sbi->s_min_batch_time = option; 157230773840STheodore Ts'o break; 1573ac27a0ecSDave Kleikamp case Opt_data_journal: 1574617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1575ac27a0ecSDave Kleikamp goto datacheck; 1576ac27a0ecSDave Kleikamp case Opt_data_ordered: 1577617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1578ac27a0ecSDave Kleikamp goto datacheck; 1579ac27a0ecSDave Kleikamp case Opt_data_writeback: 1580617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1581ac27a0ecSDave Kleikamp datacheck: 1582ac27a0ecSDave Kleikamp if (is_remount) { 1583482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1584b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1585b31e1552SEric Sandeen "Cannot change data mode on remount"); 1586ac27a0ecSDave Kleikamp return 0; 1587ac27a0ecSDave Kleikamp } 1588ac27a0ecSDave Kleikamp } else { 1589482a7425SDmitry Monakhov clear_opt(sbi->s_mount_opt, DATA_FLAGS); 1590ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1591ac27a0ecSDave Kleikamp } 1592ac27a0ecSDave Kleikamp break; 15935bf5683aSHidehiro Kawai case Opt_data_err_abort: 15945bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15955bf5683aSHidehiro Kawai break; 15965bf5683aSHidehiro Kawai case Opt_data_err_ignore: 15975bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15985bf5683aSHidehiro Kawai break; 1599ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1600ac27a0ecSDave Kleikamp case Opt_usrjquota: 160156c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 160256c50f11SDmitry Monakhov return 0; 160356c50f11SDmitry Monakhov break; 1604ac27a0ecSDave Kleikamp case Opt_grpjquota: 160556c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1606ac27a0ecSDave Kleikamp return 0; 1607ac27a0ecSDave Kleikamp break; 1608ac27a0ecSDave Kleikamp case Opt_offusrjquota: 160956c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1610ac27a0ecSDave Kleikamp return 0; 1611ac27a0ecSDave Kleikamp break; 161256c50f11SDmitry Monakhov case Opt_offgrpjquota: 161356c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 161456c50f11SDmitry Monakhov return 0; 161556c50f11SDmitry Monakhov break; 161656c50f11SDmitry Monakhov 1617ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1618dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1619dfc5d03fSJan Kara goto set_qf_format; 1620ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1621dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 16225a20bdfcSJan Kara goto set_qf_format; 16235a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 16245a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1625dfc5d03fSJan Kara set_qf_format: 162617bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1627dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1628b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1629dfc5d03fSJan Kara "journaled quota options when " 1630b31e1552SEric Sandeen "quota turned on"); 1631dfc5d03fSJan Kara return 0; 1632dfc5d03fSJan Kara } 1633dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1634ac27a0ecSDave Kleikamp break; 1635ac27a0ecSDave Kleikamp case Opt_quota: 1636ac27a0ecSDave Kleikamp case Opt_usrquota: 1637ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1638ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1639ac27a0ecSDave Kleikamp break; 1640ac27a0ecSDave Kleikamp case Opt_grpquota: 1641ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1642ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1643ac27a0ecSDave Kleikamp break; 1644ac27a0ecSDave Kleikamp case Opt_noquota: 164517bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1646b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1647b31e1552SEric Sandeen "options when quota turned on"); 1648ac27a0ecSDave Kleikamp return 0; 1649ac27a0ecSDave Kleikamp } 1650ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1651ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1652ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1653ac27a0ecSDave Kleikamp break; 1654ac27a0ecSDave Kleikamp #else 1655ac27a0ecSDave Kleikamp case Opt_quota: 1656ac27a0ecSDave Kleikamp case Opt_usrquota: 1657ac27a0ecSDave Kleikamp case Opt_grpquota: 1658b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1659b31e1552SEric Sandeen "quota options not supported"); 1660cd59e7b9SJan Kara break; 1661ac27a0ecSDave Kleikamp case Opt_usrjquota: 1662ac27a0ecSDave Kleikamp case Opt_grpjquota: 1663ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1664ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1665ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1666ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 16675a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1668b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1669b31e1552SEric Sandeen "journaled quota options not supported"); 1670ac27a0ecSDave Kleikamp break; 1671ac27a0ecSDave Kleikamp case Opt_noquota: 1672ac27a0ecSDave Kleikamp break; 1673ac27a0ecSDave Kleikamp #endif 1674ac27a0ecSDave Kleikamp case Opt_abort: 16754ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1676ac27a0ecSDave Kleikamp break; 167706705bffSTheodore Ts'o case Opt_nobarrier: 167806705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 167906705bffSTheodore Ts'o break; 1680ac27a0ecSDave Kleikamp case Opt_barrier: 168115121c18SEric Sandeen if (args[0].from) { 168215121c18SEric Sandeen if (match_int(&args[0], &option)) 168315121c18SEric Sandeen return 0; 168415121c18SEric Sandeen } else 168515121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1686ac27a0ecSDave Kleikamp if (option) 1687ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1688ac27a0ecSDave Kleikamp else 1689ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1690ac27a0ecSDave Kleikamp break; 1691ac27a0ecSDave Kleikamp case Opt_ignore: 1692ac27a0ecSDave Kleikamp break; 1693ac27a0ecSDave Kleikamp case Opt_resize: 1694ac27a0ecSDave Kleikamp if (!is_remount) { 1695b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1696b31e1552SEric Sandeen "resize option only available " 1697b31e1552SEric Sandeen "for remount"); 1698ac27a0ecSDave Kleikamp return 0; 1699ac27a0ecSDave Kleikamp } 1700ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1701ac27a0ecSDave Kleikamp return 0; 1702ac27a0ecSDave Kleikamp *n_blocks_count = option; 1703ac27a0ecSDave Kleikamp break; 1704ac27a0ecSDave Kleikamp case Opt_nobh: 1705206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1706206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1707ac27a0ecSDave Kleikamp break; 1708ac27a0ecSDave Kleikamp case Opt_bh: 1709206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1710206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1711ac27a0ecSDave Kleikamp break; 171225ec56b5SJean Noel Cordenner case Opt_i_version: 171325ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 171425ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 171525ec56b5SJean Noel Cordenner break; 1716dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1717dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1718dd919b98SAneesh Kumar K.V break; 1719c9de560dSAlex Tomas case Opt_stripe: 1720c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1721c9de560dSAlex Tomas return 0; 1722c9de560dSAlex Tomas if (option < 0) 1723c9de560dSAlex Tomas return 0; 1724c9de560dSAlex Tomas sbi->s_stripe = option; 1725c9de560dSAlex Tomas break; 172664769240SAlex Tomas case Opt_delalloc: 172764769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 172864769240SAlex Tomas break; 17296fd058f7STheodore Ts'o case Opt_block_validity: 17306fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 17316fd058f7STheodore Ts'o break; 17326fd058f7STheodore Ts'o case Opt_noblock_validity: 17336fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 17346fd058f7STheodore Ts'o break; 1735240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1736240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1737240799cdSTheodore Ts'o return 0; 1738240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1739240799cdSTheodore Ts'o return 0; 1740f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1741b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1742b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1743b31e1552SEric Sandeen " must be a power of 2"); 17443197ebdbSTheodore Ts'o return 0; 17453197ebdbSTheodore Ts'o } 1746240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1747240799cdSTheodore Ts'o break; 1748b3881f74STheodore Ts'o case Opt_journal_ioprio: 1749b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1750b3881f74STheodore Ts'o return 0; 1751b3881f74STheodore Ts'o if (option < 0 || option > 7) 1752b3881f74STheodore Ts'o break; 1753b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1754b3881f74STheodore Ts'o option); 1755b3881f74STheodore Ts'o break; 175606705bffSTheodore Ts'o case Opt_noauto_da_alloc: 175706705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 175806705bffSTheodore Ts'o break; 1759afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 176015121c18SEric Sandeen if (args[0].from) { 176115121c18SEric Sandeen if (match_int(&args[0], &option)) 176215121c18SEric Sandeen return 0; 176315121c18SEric Sandeen } else 176415121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1765afd4672dSTheodore Ts'o if (option) 1766afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1767afd4672dSTheodore Ts'o else 1768afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1769afd4672dSTheodore Ts'o break; 17705328e635SEric Sandeen case Opt_discard: 17715328e635SEric Sandeen set_opt(sbi->s_mount_opt, DISCARD); 17725328e635SEric Sandeen break; 17735328e635SEric Sandeen case Opt_nodiscard: 17745328e635SEric Sandeen clear_opt(sbi->s_mount_opt, DISCARD); 17755328e635SEric Sandeen break; 1776744692dcSJiaying Zhang case Opt_dioread_nolock: 1777744692dcSJiaying Zhang set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1778744692dcSJiaying Zhang break; 1779744692dcSJiaying Zhang case Opt_dioread_lock: 1780744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1781744692dcSJiaying Zhang break; 1782bfff6873SLukas Czerner case Opt_init_inode_table: 1783bfff6873SLukas Czerner set_opt(sbi->s_mount_opt, INIT_INODE_TABLE); 1784bfff6873SLukas Czerner if (args[0].from) { 1785bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1786bfff6873SLukas Czerner return 0; 1787bfff6873SLukas Czerner } else 1788bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1789bfff6873SLukas Czerner if (option < 0) 1790bfff6873SLukas Czerner return 0; 1791bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1792bfff6873SLukas Czerner break; 1793bfff6873SLukas Czerner case Opt_noinit_inode_table: 1794bfff6873SLukas Czerner clear_opt(sbi->s_mount_opt, INIT_INODE_TABLE); 1795bfff6873SLukas Czerner break; 1796ac27a0ecSDave Kleikamp default: 1797b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1798b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1799b31e1552SEric Sandeen "or missing value", p); 1800ac27a0ecSDave Kleikamp return 0; 1801ac27a0ecSDave Kleikamp } 1802ac27a0ecSDave Kleikamp } 1803ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1804ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1805482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1806ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1807ac27a0ecSDave Kleikamp 1808482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1809ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1810ac27a0ecSDave Kleikamp 181156c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1812b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1813b31e1552SEric Sandeen "format mixing"); 1814ac27a0ecSDave Kleikamp return 0; 1815ac27a0ecSDave Kleikamp } 1816ac27a0ecSDave Kleikamp 1817ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1818b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1819b31e1552SEric Sandeen "not specified"); 1820ac27a0ecSDave Kleikamp return 0; 1821ac27a0ecSDave Kleikamp } 1822ac27a0ecSDave Kleikamp } else { 1823ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1824b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 18252c8be6b2SJan Kara "specified with no journaling " 1826b31e1552SEric Sandeen "enabled"); 1827ac27a0ecSDave Kleikamp return 0; 1828ac27a0ecSDave Kleikamp } 1829ac27a0ecSDave Kleikamp } 1830ac27a0ecSDave Kleikamp #endif 1831ac27a0ecSDave Kleikamp return 1; 1832ac27a0ecSDave Kleikamp } 1833ac27a0ecSDave Kleikamp 1834617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1835ac27a0ecSDave Kleikamp int read_only) 1836ac27a0ecSDave Kleikamp { 1837617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1838ac27a0ecSDave Kleikamp int res = 0; 1839ac27a0ecSDave Kleikamp 1840617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1841b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1842b31e1552SEric Sandeen "forcing read-only mode"); 1843ac27a0ecSDave Kleikamp res = MS_RDONLY; 1844ac27a0ecSDave Kleikamp } 1845ac27a0ecSDave Kleikamp if (read_only) 1846ac27a0ecSDave Kleikamp return res; 1847617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1848b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1849b31e1552SEric Sandeen "running e2fsck is recommended"); 1850617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1851b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1852b31e1552SEric Sandeen "warning: mounting fs with errors, " 1853b31e1552SEric Sandeen "running e2fsck is recommended"); 1854ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1855ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1856ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1857b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1858b31e1552SEric Sandeen "warning: maximal mount count reached, " 1859b31e1552SEric Sandeen "running e2fsck is recommended"); 1860ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1861ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1862ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1863b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1864b31e1552SEric Sandeen "warning: checktime reached, " 1865b31e1552SEric Sandeen "running e2fsck is recommended"); 18660390131bSFrank Mayhar if (!sbi->s_journal) 1867216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1868ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1869617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1870e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1871ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1872617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18730390131bSFrank Mayhar if (sbi->s_journal) 1874617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1875ac27a0ecSDave Kleikamp 1876e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1877ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1878a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 18797f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1880ac27a0ecSDave Kleikamp sb->s_blocksize, 1881ac27a0ecSDave Kleikamp sbi->s_groups_count, 1882617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1883617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1884ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1885ac27a0ecSDave Kleikamp 1886ac27a0ecSDave Kleikamp return res; 1887ac27a0ecSDave Kleikamp } 1888ac27a0ecSDave Kleikamp 1889772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1890772cb7c8SJose R. Santos { 1891772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1892772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1893772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1894772cb7c8SJose R. Santos ext4_group_t flex_group; 1895772cb7c8SJose R. Santos int groups_per_flex = 0; 1896c5ca7c76STheodore Ts'o size_t size; 1897772cb7c8SJose R. Santos int i; 1898772cb7c8SJose R. Santos 1899503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1900503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1901503358aeSTheodore Ts'o 1902503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1903772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1904772cb7c8SJose R. Santos return 1; 1905772cb7c8SJose R. Santos } 1906772cb7c8SJose R. Santos 1907c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1908c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1909d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1910d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1911c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1912c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1913c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1914c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1915c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1916c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1917c5ca7c76STheodore Ts'o } 1918772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1919b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1920b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1921772cb7c8SJose R. Santos goto failed; 1922772cb7c8SJose R. Santos } 1923772cb7c8SJose R. Santos 1924772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 192588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1926772cb7c8SJose R. Santos 1927772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19287ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19297ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 19307ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 19317ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 19327ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19337ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1934772cb7c8SJose R. Santos } 1935772cb7c8SJose R. Santos 1936772cb7c8SJose R. Santos return 1; 1937772cb7c8SJose R. Santos failed: 1938772cb7c8SJose R. Santos return 0; 1939772cb7c8SJose R. Santos } 1940772cb7c8SJose R. Santos 1941717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1942717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1943717d50e4SAndreas Dilger { 1944717d50e4SAndreas Dilger __u16 crc = 0; 1945717d50e4SAndreas Dilger 1946717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1947717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1948717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1949717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1950717d50e4SAndreas Dilger 1951717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1952717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1953717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1954717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1955717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1956717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1957717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1958717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1959717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1960717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1961717d50e4SAndreas Dilger offset); 1962717d50e4SAndreas Dilger } 1963717d50e4SAndreas Dilger 1964717d50e4SAndreas Dilger return cpu_to_le16(crc); 1965717d50e4SAndreas Dilger } 1966717d50e4SAndreas Dilger 1967717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1968717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1969717d50e4SAndreas Dilger { 1970717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1971717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1972717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1973717d50e4SAndreas Dilger return 0; 1974717d50e4SAndreas Dilger 1975717d50e4SAndreas Dilger return 1; 1976717d50e4SAndreas Dilger } 1977717d50e4SAndreas Dilger 1978ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1979bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 1980bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 1981ac27a0ecSDave Kleikamp { 1982617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1983617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1984617ba13bSMingming Cao ext4_fsblk_t last_block; 1985bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1986bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1987bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1988ce421581SJose R. Santos int flexbg_flag = 0; 1989bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 1990ac27a0ecSDave Kleikamp 1991ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1992ce421581SJose R. Santos flexbg_flag = 1; 1993ce421581SJose R. Santos 1994617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1995ac27a0ecSDave Kleikamp 1996197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1997197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1998197cd65aSAkinobu Mita 1999ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2000bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2001ac27a0ecSDave Kleikamp else 2002ac27a0ecSDave Kleikamp last_block = first_block + 2003617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2004ac27a0ecSDave Kleikamp 2005bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2006bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2007bfff6873SLukas Czerner grp = i; 2008bfff6873SLukas Czerner 20098fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20102b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2011b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2012a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2013b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2014ac27a0ecSDave Kleikamp return 0; 2015ac27a0ecSDave Kleikamp } 20168fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20172b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2018b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2019a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2020b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2021ac27a0ecSDave Kleikamp return 0; 2022ac27a0ecSDave Kleikamp } 20238fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2024bd81d8eeSLaurent Vivier if (inode_table < first_block || 20252b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2026b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2027a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2028b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2029ac27a0ecSDave Kleikamp return 0; 2030ac27a0ecSDave Kleikamp } 2031955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2032717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2033b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2034b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2035fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2036fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20377ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2038955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2039717d50e4SAndreas Dilger return 0; 2040717d50e4SAndreas Dilger } 20417ee1ec4cSLi Zefan } 2042955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2043ce421581SJose R. Santos if (!flexbg_flag) 2044617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2045ac27a0ecSDave Kleikamp } 2046bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2047bfff6873SLukas Czerner *first_not_zeroed = grp; 2048ac27a0ecSDave Kleikamp 2049bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 2050617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2051ac27a0ecSDave Kleikamp return 1; 2052ac27a0ecSDave Kleikamp } 2053ac27a0ecSDave Kleikamp 2054617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2055ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2056ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2057ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2058ac27a0ecSDave Kleikamp * 2059ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2060ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2061ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2062ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2063ac27a0ecSDave Kleikamp * 2064ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2065ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2066ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2067617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2068ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2069ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2070ac27a0ecSDave Kleikamp */ 2071617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2072617ba13bSMingming Cao struct ext4_super_block *es) 2073ac27a0ecSDave Kleikamp { 2074ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2075ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2076ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2077ac27a0ecSDave Kleikamp int i; 2078ac27a0ecSDave Kleikamp #endif 2079ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2080ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2081ac27a0ecSDave Kleikamp return; 2082ac27a0ecSDave Kleikamp } 2083ac27a0ecSDave Kleikamp 2084a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2085b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2086b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2087a8f48a95SEric Sandeen return; 2088a8f48a95SEric Sandeen } 2089a8f48a95SEric Sandeen 2090617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2091ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2092ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2093ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2094ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2095ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2096ac27a0ecSDave Kleikamp return; 2097ac27a0ecSDave Kleikamp } 2098ac27a0ecSDave Kleikamp 2099ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2100b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2101ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2102ac27a0ecSDave Kleikamp } 2103ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2104ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2105ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2106ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2107ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2108617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2109617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2110ac27a0ecSDave Kleikamp if (ret < 0) 2111b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2112b31e1552SEric Sandeen "Cannot turn on journaled " 2113b31e1552SEric Sandeen "quota: error %d", ret); 2114ac27a0ecSDave Kleikamp } 2115ac27a0ecSDave Kleikamp } 2116ac27a0ecSDave Kleikamp #endif 2117ac27a0ecSDave Kleikamp 2118ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2119ac27a0ecSDave Kleikamp struct inode *inode; 2120ac27a0ecSDave Kleikamp 212197bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 212297bd42b9SJosef Bacik if (IS_ERR(inode)) { 2123ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2124ac27a0ecSDave Kleikamp break; 2125ac27a0ecSDave Kleikamp } 2126ac27a0ecSDave Kleikamp 2127617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2128871a2931SChristoph Hellwig dquot_initialize(inode); 2129ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2130b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2131b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 213246e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2133e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2134ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2135617ba13bSMingming Cao ext4_truncate(inode); 2136ac27a0ecSDave Kleikamp nr_truncates++; 2137ac27a0ecSDave Kleikamp } else { 2138b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2139b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 214046e665e9SHarvey Harrison __func__, inode->i_ino); 2141ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2142ac27a0ecSDave Kleikamp inode->i_ino); 2143ac27a0ecSDave Kleikamp nr_orphans++; 2144ac27a0ecSDave Kleikamp } 2145ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2146ac27a0ecSDave Kleikamp } 2147ac27a0ecSDave Kleikamp 2148ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2149ac27a0ecSDave Kleikamp 2150ac27a0ecSDave Kleikamp if (nr_orphans) 2151b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2152b31e1552SEric Sandeen PLURAL(nr_orphans)); 2153ac27a0ecSDave Kleikamp if (nr_truncates) 2154b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2155b31e1552SEric Sandeen PLURAL(nr_truncates)); 2156ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2157ac27a0ecSDave Kleikamp /* Turn quotas off */ 2158ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2159ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2160287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2161ac27a0ecSDave Kleikamp } 2162ac27a0ecSDave Kleikamp #endif 2163ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2164ac27a0ecSDave Kleikamp } 21650b8e58a1SAndreas Dilger 2166cd2291a4SEric Sandeen /* 2167cd2291a4SEric Sandeen * Maximal extent format file size. 2168cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2169cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2170cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2171cd2291a4SEric Sandeen * so that won't be a limiting factor. 2172cd2291a4SEric Sandeen * 2173cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2174cd2291a4SEric Sandeen */ 2175f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2176cd2291a4SEric Sandeen { 2177cd2291a4SEric Sandeen loff_t res; 2178cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2179cd2291a4SEric Sandeen 2180cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2181f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2182cd2291a4SEric Sandeen /* 218390c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2184cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2185cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2186cd2291a4SEric Sandeen */ 2187cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2188cd2291a4SEric Sandeen 2189cd2291a4SEric Sandeen /* total blocks in file system block size */ 2190cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2191cd2291a4SEric Sandeen upper_limit <<= blkbits; 2192cd2291a4SEric Sandeen } 2193cd2291a4SEric Sandeen 2194cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2195cd2291a4SEric Sandeen res = 1LL << 32; 2196cd2291a4SEric Sandeen res <<= blkbits; 2197cd2291a4SEric Sandeen res -= 1; 2198cd2291a4SEric Sandeen 2199cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2200cd2291a4SEric Sandeen if (res > upper_limit) 2201cd2291a4SEric Sandeen res = upper_limit; 2202cd2291a4SEric Sandeen 2203cd2291a4SEric Sandeen return res; 2204cd2291a4SEric Sandeen } 2205ac27a0ecSDave Kleikamp 2206ac27a0ecSDave Kleikamp /* 2207cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22080fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22090fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2210ac27a0ecSDave Kleikamp */ 2211f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2212ac27a0ecSDave Kleikamp { 2213617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22140fc1b451SAneesh Kumar K.V int meta_blocks; 22150fc1b451SAneesh Kumar K.V loff_t upper_limit; 22160b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22170b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22180b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22190b8e58a1SAndreas Dilger * 22200b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22210b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22220fc1b451SAneesh Kumar K.V */ 22230fc1b451SAneesh Kumar K.V 2224f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22250fc1b451SAneesh Kumar K.V /* 222690c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22270b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22280b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 22290fc1b451SAneesh Kumar K.V */ 22300fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 22310fc1b451SAneesh Kumar K.V 22320fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 22330fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 22340fc1b451SAneesh Kumar K.V 22350fc1b451SAneesh Kumar K.V } else { 22368180a562SAneesh Kumar K.V /* 22378180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 22388180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 22398180a562SAneesh Kumar K.V * represent total number of blocks in 22408180a562SAneesh Kumar K.V * file system block size 22418180a562SAneesh Kumar K.V */ 22420fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 22430fc1b451SAneesh Kumar K.V 22440fc1b451SAneesh Kumar K.V } 22450fc1b451SAneesh Kumar K.V 22460fc1b451SAneesh Kumar K.V /* indirect blocks */ 22470fc1b451SAneesh Kumar K.V meta_blocks = 1; 22480fc1b451SAneesh Kumar K.V /* double indirect blocks */ 22490fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 22500fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 22510fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 22520fc1b451SAneesh Kumar K.V 22530fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 22540fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2255ac27a0ecSDave Kleikamp 2256ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2257ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2258ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2259ac27a0ecSDave Kleikamp res <<= bits; 2260ac27a0ecSDave Kleikamp if (res > upper_limit) 2261ac27a0ecSDave Kleikamp res = upper_limit; 22620fc1b451SAneesh Kumar K.V 22630fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 22640fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 22650fc1b451SAneesh Kumar K.V 2266ac27a0ecSDave Kleikamp return res; 2267ac27a0ecSDave Kleikamp } 2268ac27a0ecSDave Kleikamp 2269617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 227070bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2271ac27a0ecSDave Kleikamp { 2272617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2273fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2274ac27a0ecSDave Kleikamp int has_super = 0; 2275ac27a0ecSDave Kleikamp 2276ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2277ac27a0ecSDave Kleikamp 2278617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2279ac27a0ecSDave Kleikamp nr < first_meta_bg) 228070bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2281ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2282617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2283ac27a0ecSDave Kleikamp has_super = 1; 22840b8e58a1SAndreas Dilger 2285617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2286ac27a0ecSDave Kleikamp } 2287ac27a0ecSDave Kleikamp 2288c9de560dSAlex Tomas /** 2289c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2290c9de560dSAlex Tomas * @sbi: In memory super block info 2291c9de560dSAlex Tomas * 2292c9de560dSAlex Tomas * If we have specified it via mount option, then 2293c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2294c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2295c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2296c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2297c9de560dSAlex Tomas * 2298c9de560dSAlex Tomas */ 2299c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2300c9de560dSAlex Tomas { 2301c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2302c9de560dSAlex Tomas unsigned long stripe_width = 2303c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2304c9de560dSAlex Tomas 2305c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2306c9de560dSAlex Tomas return sbi->s_stripe; 2307c9de560dSAlex Tomas 2308c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2309c9de560dSAlex Tomas return stripe_width; 2310c9de560dSAlex Tomas 2311c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2312c9de560dSAlex Tomas return stride; 2313c9de560dSAlex Tomas 2314c9de560dSAlex Tomas return 0; 2315c9de560dSAlex Tomas } 2316ac27a0ecSDave Kleikamp 23173197ebdbSTheodore Ts'o /* sysfs supprt */ 23183197ebdbSTheodore Ts'o 23193197ebdbSTheodore Ts'o struct ext4_attr { 23203197ebdbSTheodore Ts'o struct attribute attr; 23213197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23223197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23233197ebdbSTheodore Ts'o const char *, size_t); 23243197ebdbSTheodore Ts'o int offset; 23253197ebdbSTheodore Ts'o }; 23263197ebdbSTheodore Ts'o 23273197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23283197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 23293197ebdbSTheodore Ts'o { 23303197ebdbSTheodore Ts'o char *endp; 23313197ebdbSTheodore Ts'o 2332e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2333e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 23343197ebdbSTheodore Ts'o if (*endp || *value > max) 23353197ebdbSTheodore Ts'o return -EINVAL; 23363197ebdbSTheodore Ts'o 23373197ebdbSTheodore Ts'o return 0; 23383197ebdbSTheodore Ts'o } 23393197ebdbSTheodore Ts'o 23403197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 23413197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23423197ebdbSTheodore Ts'o char *buf) 23433197ebdbSTheodore Ts'o { 23443197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 23453197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 23463197ebdbSTheodore Ts'o } 23473197ebdbSTheodore Ts'o 23483197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 23493197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23503197ebdbSTheodore Ts'o { 23513197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23523197ebdbSTheodore Ts'o 2353f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2354f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23553197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 23563197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 23573197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 23583197ebdbSTheodore Ts'o } 23593197ebdbSTheodore Ts'o 23603197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 23613197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23623197ebdbSTheodore Ts'o { 23633197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23643197ebdbSTheodore Ts'o 2365f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2366f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23673197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2368a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 23693197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2370a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 23713197ebdbSTheodore Ts'o } 23723197ebdbSTheodore Ts'o 23733197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 23743197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23753197ebdbSTheodore Ts'o const char *buf, size_t count) 23763197ebdbSTheodore Ts'o { 23773197ebdbSTheodore Ts'o unsigned long t; 23783197ebdbSTheodore Ts'o 23793197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 23803197ebdbSTheodore Ts'o return -EINVAL; 23813197ebdbSTheodore Ts'o 2382f7c43950STheodore Ts'o if (!is_power_of_2(t)) 23833197ebdbSTheodore Ts'o return -EINVAL; 23843197ebdbSTheodore Ts'o 23853197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 23863197ebdbSTheodore Ts'o return count; 23873197ebdbSTheodore Ts'o } 23883197ebdbSTheodore Ts'o 23893197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 23903197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23913197ebdbSTheodore Ts'o { 23923197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 23933197ebdbSTheodore Ts'o 23943197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 23953197ebdbSTheodore Ts'o } 23963197ebdbSTheodore Ts'o 23973197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 23983197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23993197ebdbSTheodore Ts'o const char *buf, size_t count) 24003197ebdbSTheodore Ts'o { 24013197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24023197ebdbSTheodore Ts'o unsigned long t; 24033197ebdbSTheodore Ts'o 24043197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24053197ebdbSTheodore Ts'o return -EINVAL; 24063197ebdbSTheodore Ts'o *ui = t; 24073197ebdbSTheodore Ts'o return count; 24083197ebdbSTheodore Ts'o } 24093197ebdbSTheodore Ts'o 24103197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24113197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24123197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24133197ebdbSTheodore Ts'o .show = _show, \ 24143197ebdbSTheodore Ts'o .store = _store, \ 24153197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24163197ebdbSTheodore Ts'o } 24173197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 24183197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 24193197ebdbSTheodore Ts'o 2420*857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 24213197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 24223197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 24233197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 24243197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 24253197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 24263197ebdbSTheodore Ts'o 24273197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 24283197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 24293197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 24303197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 24313197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 243211013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 24333197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 24343197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 24353197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 24363197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 24373197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 24383197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 243955138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 24403197ebdbSTheodore Ts'o 24413197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 24423197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 24433197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 24443197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 24453197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 244611013911SAndreas Dilger ATTR_LIST(inode_goal), 24473197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 24483197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 24493197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 24503197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 24513197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 24523197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 245355138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 24543197ebdbSTheodore Ts'o NULL, 24553197ebdbSTheodore Ts'o }; 24563197ebdbSTheodore Ts'o 2457*857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2458*857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 2459*857ac889SLukas Czerner 2460*857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2461*857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 2462*857ac889SLukas Czerner NULL, 2463*857ac889SLukas Czerner }; 2464*857ac889SLukas Czerner 24653197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 24663197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 24673197ebdbSTheodore Ts'o { 24683197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24693197ebdbSTheodore Ts'o s_kobj); 24703197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 24713197ebdbSTheodore Ts'o 24723197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 24733197ebdbSTheodore Ts'o } 24743197ebdbSTheodore Ts'o 24753197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 24763197ebdbSTheodore Ts'o struct attribute *attr, 24773197ebdbSTheodore Ts'o const char *buf, size_t len) 24783197ebdbSTheodore Ts'o { 24793197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24803197ebdbSTheodore Ts'o s_kobj); 24813197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 24823197ebdbSTheodore Ts'o 24833197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 24843197ebdbSTheodore Ts'o } 24853197ebdbSTheodore Ts'o 24863197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 24873197ebdbSTheodore Ts'o { 24883197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24893197ebdbSTheodore Ts'o s_kobj); 24903197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 24913197ebdbSTheodore Ts'o } 24923197ebdbSTheodore Ts'o 249352cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 24943197ebdbSTheodore Ts'o .show = ext4_attr_show, 24953197ebdbSTheodore Ts'o .store = ext4_attr_store, 24963197ebdbSTheodore Ts'o }; 24973197ebdbSTheodore Ts'o 24983197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 24993197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25003197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25013197ebdbSTheodore Ts'o .release = ext4_sb_release, 25023197ebdbSTheodore Ts'o }; 25033197ebdbSTheodore Ts'o 2504*857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2505*857ac889SLukas Czerner { 2506*857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2507*857ac889SLukas Czerner } 2508*857ac889SLukas Czerner 2509*857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2510*857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2511*857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2512*857ac889SLukas Czerner .release = ext4_feat_release, 2513*857ac889SLukas Czerner }; 2514*857ac889SLukas Czerner 2515a13fb1a4SEric Sandeen /* 2516a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2517a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2518a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2519a13fb1a4SEric Sandeen * 0 if it cannot be. 2520a13fb1a4SEric Sandeen */ 2521a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2522a13fb1a4SEric Sandeen { 2523a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2524a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2525a13fb1a4SEric Sandeen "Couldn't mount because of " 2526a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2527a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2528a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2529a13fb1a4SEric Sandeen return 0; 2530a13fb1a4SEric Sandeen } 2531a13fb1a4SEric Sandeen 2532a13fb1a4SEric Sandeen if (readonly) 2533a13fb1a4SEric Sandeen return 1; 2534a13fb1a4SEric Sandeen 2535a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2536a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2537a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2538a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2539a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2540a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2541a13fb1a4SEric Sandeen return 0; 2542a13fb1a4SEric Sandeen } 2543a13fb1a4SEric Sandeen /* 2544a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2545a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2546a13fb1a4SEric Sandeen */ 2547a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2548a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2549a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2550a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2551a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2552a13fb1a4SEric Sandeen return 0; 2553a13fb1a4SEric Sandeen } 2554a13fb1a4SEric Sandeen } 2555a13fb1a4SEric Sandeen return 1; 2556a13fb1a4SEric Sandeen } 2557a13fb1a4SEric Sandeen 255866e61a9eSTheodore Ts'o /* 255966e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 256066e61a9eSTheodore Ts'o * on the file system 256166e61a9eSTheodore Ts'o */ 256266e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 256366e61a9eSTheodore Ts'o { 256466e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 256566e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 256666e61a9eSTheodore Ts'o struct ext4_super_block *es; 256766e61a9eSTheodore Ts'o 256866e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 256966e61a9eSTheodore Ts'o es = sbi->s_es; 257066e61a9eSTheodore Ts'o 257166e61a9eSTheodore Ts'o if (es->s_error_count) 257266e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 257366e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 257466e61a9eSTheodore Ts'o if (es->s_first_error_time) { 257566e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 257666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 257766e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 257866e61a9eSTheodore Ts'o es->s_first_error_func, 257966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 258066e61a9eSTheodore Ts'o if (es->s_first_error_ino) 258166e61a9eSTheodore Ts'o printk(": inode %u", 258266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 258366e61a9eSTheodore Ts'o if (es->s_first_error_block) 258466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 258566e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 258666e61a9eSTheodore Ts'o printk("\n"); 258766e61a9eSTheodore Ts'o } 258866e61a9eSTheodore Ts'o if (es->s_last_error_time) { 258966e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 259066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 259166e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 259266e61a9eSTheodore Ts'o es->s_last_error_func, 259366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 259466e61a9eSTheodore Ts'o if (es->s_last_error_ino) 259566e61a9eSTheodore Ts'o printk(": inode %u", 259666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 259766e61a9eSTheodore Ts'o if (es->s_last_error_block) 259866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 259966e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 260066e61a9eSTheodore Ts'o printk("\n"); 260166e61a9eSTheodore Ts'o } 260266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 260366e61a9eSTheodore Ts'o } 260466e61a9eSTheodore Ts'o 2605bfff6873SLukas Czerner static void ext4_lazyinode_timeout(unsigned long data) 2606bfff6873SLukas Czerner { 2607bfff6873SLukas Czerner struct task_struct *p = (struct task_struct *)data; 2608bfff6873SLukas Czerner wake_up_process(p); 2609bfff6873SLukas Czerner } 2610bfff6873SLukas Czerner 2611bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2612bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2613bfff6873SLukas Czerner { 2614bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2615bfff6873SLukas Czerner ext4_group_t group, ngroups; 2616bfff6873SLukas Czerner struct super_block *sb; 2617bfff6873SLukas Czerner unsigned long timeout = 0; 2618bfff6873SLukas Czerner int ret = 0; 2619bfff6873SLukas Czerner 2620bfff6873SLukas Czerner sb = elr->lr_super; 2621bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2622bfff6873SLukas Czerner 2623bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2624bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2625bfff6873SLukas Czerner if (!gdp) { 2626bfff6873SLukas Czerner ret = 1; 2627bfff6873SLukas Czerner break; 2628bfff6873SLukas Czerner } 2629bfff6873SLukas Czerner 2630bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2631bfff6873SLukas Czerner break; 2632bfff6873SLukas Czerner } 2633bfff6873SLukas Czerner 2634bfff6873SLukas Czerner if (group == ngroups) 2635bfff6873SLukas Czerner ret = 1; 2636bfff6873SLukas Czerner 2637bfff6873SLukas Czerner if (!ret) { 2638bfff6873SLukas Czerner timeout = jiffies; 2639bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2640bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2641bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 2642bfff6873SLukas Czerner timeout = jiffies - timeout; 2643bfff6873SLukas Czerner if (elr->lr_sbi->s_li_wait_mult) 2644bfff6873SLukas Czerner timeout *= elr->lr_sbi->s_li_wait_mult; 2645bfff6873SLukas Czerner else 2646bfff6873SLukas Czerner timeout *= 20; 2647bfff6873SLukas Czerner elr->lr_timeout = timeout; 2648bfff6873SLukas Czerner } 2649bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2650bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2651bfff6873SLukas Czerner } 2652bfff6873SLukas Czerner 2653bfff6873SLukas Czerner return ret; 2654bfff6873SLukas Czerner } 2655bfff6873SLukas Czerner 2656bfff6873SLukas Czerner /* 2657bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 2658bfff6873SLukas Czerner * request tructure. Should be called with li_list_mtx held 2659bfff6873SLukas Czerner */ 2660bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2661bfff6873SLukas Czerner { 2662bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2663bfff6873SLukas Czerner 2664bfff6873SLukas Czerner if (!elr) 2665bfff6873SLukas Czerner return; 2666bfff6873SLukas Czerner 2667bfff6873SLukas Czerner sbi = elr->lr_sbi; 2668bfff6873SLukas Czerner 2669bfff6873SLukas Czerner list_del(&elr->lr_request); 2670bfff6873SLukas Czerner sbi->s_li_request = NULL; 2671bfff6873SLukas Czerner kfree(elr); 2672bfff6873SLukas Czerner } 2673bfff6873SLukas Czerner 2674bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2675bfff6873SLukas Czerner { 2676bfff6873SLukas Czerner struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; 2677bfff6873SLukas Czerner 2678bfff6873SLukas Czerner if (!ext4_li_info) 2679bfff6873SLukas Czerner return; 2680bfff6873SLukas Czerner 2681bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2682bfff6873SLukas Czerner ext4_remove_li_request(elr); 2683bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2684bfff6873SLukas Czerner } 2685bfff6873SLukas Czerner 2686bfff6873SLukas Czerner /* 2687bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2688bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2689bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2690bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2691bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2692bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2693bfff6873SLukas Czerner * next waking time and put itself into sleep. 2694bfff6873SLukas Czerner */ 2695bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2696bfff6873SLukas Czerner { 2697bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2698bfff6873SLukas Czerner struct list_head *pos, *n; 2699bfff6873SLukas Czerner struct ext4_li_request *elr; 2700bfff6873SLukas Czerner unsigned long next_wakeup; 2701bfff6873SLukas Czerner DEFINE_WAIT(wait); 2702bfff6873SLukas Czerner int ret; 2703bfff6873SLukas Czerner 2704bfff6873SLukas Czerner BUG_ON(NULL == eli); 2705bfff6873SLukas Czerner 2706bfff6873SLukas Czerner eli->li_timer.data = (unsigned long)current; 2707bfff6873SLukas Czerner eli->li_timer.function = ext4_lazyinode_timeout; 2708bfff6873SLukas Czerner 2709bfff6873SLukas Czerner eli->li_task = current; 2710bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2711bfff6873SLukas Czerner 2712bfff6873SLukas Czerner cont_thread: 2713bfff6873SLukas Czerner while (true) { 2714bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2715bfff6873SLukas Czerner 2716bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2717bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2718bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2719bfff6873SLukas Czerner goto exit_thread; 2720bfff6873SLukas Czerner } 2721bfff6873SLukas Czerner 2722bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2723bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2724bfff6873SLukas Czerner lr_request); 2725bfff6873SLukas Czerner 2726bfff6873SLukas Czerner if (time_after_eq(jiffies, elr->lr_next_sched)) 2727bfff6873SLukas Czerner ret = ext4_run_li_request(elr); 2728bfff6873SLukas Czerner 2729bfff6873SLukas Czerner if (ret) { 2730bfff6873SLukas Czerner ret = 0; 2731bfff6873SLukas Czerner ext4_remove_li_request(elr); 2732bfff6873SLukas Czerner continue; 2733bfff6873SLukas Czerner } 2734bfff6873SLukas Czerner 2735bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2736bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2737bfff6873SLukas Czerner } 2738bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2739bfff6873SLukas Czerner 2740bfff6873SLukas Czerner if (freezing(current)) 2741bfff6873SLukas Czerner refrigerator(); 2742bfff6873SLukas Czerner 2743bfff6873SLukas Czerner if (time_after_eq(jiffies, next_wakeup)) { 2744bfff6873SLukas Czerner cond_resched(); 2745bfff6873SLukas Czerner continue; 2746bfff6873SLukas Czerner } 2747bfff6873SLukas Czerner 2748bfff6873SLukas Czerner eli->li_timer.expires = next_wakeup; 2749bfff6873SLukas Czerner add_timer(&eli->li_timer); 2750bfff6873SLukas Czerner prepare_to_wait(&eli->li_wait_daemon, &wait, 2751bfff6873SLukas Czerner TASK_INTERRUPTIBLE); 2752bfff6873SLukas Czerner if (time_before(jiffies, next_wakeup)) 2753bfff6873SLukas Czerner schedule(); 2754bfff6873SLukas Czerner finish_wait(&eli->li_wait_daemon, &wait); 2755bfff6873SLukas Czerner } 2756bfff6873SLukas Czerner 2757bfff6873SLukas Czerner exit_thread: 2758bfff6873SLukas Czerner /* 2759bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2760bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2761bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2762bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2763bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2764bfff6873SLukas Czerner * new one. 2765bfff6873SLukas Czerner */ 2766bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2767bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2768bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2769bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2770bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2771bfff6873SLukas Czerner goto cont_thread; 2772bfff6873SLukas Czerner } 2773bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2774bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2775bfff6873SLukas Czerner eli->li_task = NULL; 2776bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2777bfff6873SLukas Czerner 2778bfff6873SLukas Czerner kfree(ext4_li_info); 2779bfff6873SLukas Czerner ext4_li_info = NULL; 2780bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2781bfff6873SLukas Czerner 2782bfff6873SLukas Czerner return 0; 2783bfff6873SLukas Czerner } 2784bfff6873SLukas Czerner 2785bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2786bfff6873SLukas Czerner { 2787bfff6873SLukas Czerner struct list_head *pos, *n; 2788bfff6873SLukas Czerner struct ext4_li_request *elr; 2789bfff6873SLukas Czerner 2790bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2791bfff6873SLukas Czerner if (list_empty(&ext4_li_info->li_request_list)) 2792bfff6873SLukas Czerner return; 2793bfff6873SLukas Czerner 2794bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2795bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2796bfff6873SLukas Czerner lr_request); 2797bfff6873SLukas Czerner ext4_remove_li_request(elr); 2798bfff6873SLukas Czerner } 2799bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2800bfff6873SLukas Czerner } 2801bfff6873SLukas Czerner 2802bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2803bfff6873SLukas Czerner { 2804bfff6873SLukas Czerner struct task_struct *t; 2805bfff6873SLukas Czerner 2806bfff6873SLukas Czerner t = kthread_run(ext4_lazyinit_thread, ext4_li_info, "ext4lazyinit"); 2807bfff6873SLukas Czerner if (IS_ERR(t)) { 2808bfff6873SLukas Czerner int err = PTR_ERR(t); 2809bfff6873SLukas Czerner ext4_clear_request_list(); 2810bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2811bfff6873SLukas Czerner kfree(ext4_li_info); 2812bfff6873SLukas Czerner ext4_li_info = NULL; 2813bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2814bfff6873SLukas Czerner "initialization thread\n", 2815bfff6873SLukas Czerner err); 2816bfff6873SLukas Czerner return err; 2817bfff6873SLukas Czerner } 2818bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2819bfff6873SLukas Czerner 2820bfff6873SLukas Czerner wait_event(ext4_li_info->li_wait_task, ext4_li_info->li_task != NULL); 2821bfff6873SLukas Czerner return 0; 2822bfff6873SLukas Czerner } 2823bfff6873SLukas Czerner 2824bfff6873SLukas Czerner /* 2825bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2826bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2827bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2828bfff6873SLukas Czerner * groups and return total number of groups. 2829bfff6873SLukas Czerner */ 2830bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2831bfff6873SLukas Czerner { 2832bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2833bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2834bfff6873SLukas Czerner 2835bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2836bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2837bfff6873SLukas Czerner if (!gdp) 2838bfff6873SLukas Czerner continue; 2839bfff6873SLukas Czerner 2840bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2841bfff6873SLukas Czerner break; 2842bfff6873SLukas Czerner } 2843bfff6873SLukas Czerner 2844bfff6873SLukas Czerner return group; 2845bfff6873SLukas Czerner } 2846bfff6873SLukas Czerner 2847bfff6873SLukas Czerner static int ext4_li_info_new(void) 2848bfff6873SLukas Czerner { 2849bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2850bfff6873SLukas Czerner 2851bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2852bfff6873SLukas Czerner if (!eli) 2853bfff6873SLukas Czerner return -ENOMEM; 2854bfff6873SLukas Czerner 2855bfff6873SLukas Czerner eli->li_task = NULL; 2856bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2857bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2858bfff6873SLukas Czerner 2859bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_daemon); 2860bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_task); 2861bfff6873SLukas Czerner init_timer(&eli->li_timer); 2862bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2863bfff6873SLukas Czerner 2864bfff6873SLukas Czerner ext4_li_info = eli; 2865bfff6873SLukas Czerner 2866bfff6873SLukas Czerner return 0; 2867bfff6873SLukas Czerner } 2868bfff6873SLukas Czerner 2869bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2870bfff6873SLukas Czerner ext4_group_t start) 2871bfff6873SLukas Czerner { 2872bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2873bfff6873SLukas Czerner struct ext4_li_request *elr; 2874bfff6873SLukas Czerner unsigned long rnd; 2875bfff6873SLukas Czerner 2876bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2877bfff6873SLukas Czerner if (!elr) 2878bfff6873SLukas Czerner return NULL; 2879bfff6873SLukas Czerner 2880bfff6873SLukas Czerner elr->lr_super = sb; 2881bfff6873SLukas Czerner elr->lr_sbi = sbi; 2882bfff6873SLukas Czerner elr->lr_next_group = start; 2883bfff6873SLukas Czerner 2884bfff6873SLukas Czerner /* 2885bfff6873SLukas Czerner * Randomize first schedule time of the request to 2886bfff6873SLukas Czerner * spread the inode table initialization requests 2887bfff6873SLukas Czerner * better. 2888bfff6873SLukas Czerner */ 2889bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2890bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2891bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2892bfff6873SLukas Czerner 2893bfff6873SLukas Czerner return elr; 2894bfff6873SLukas Czerner } 2895bfff6873SLukas Czerner 2896bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2897bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2898bfff6873SLukas Czerner { 2899bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2900bfff6873SLukas Czerner struct ext4_li_request *elr; 2901bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 2902bfff6873SLukas Czerner int ret = 0; 2903bfff6873SLukas Czerner 2904bfff6873SLukas Czerner if (sbi->s_li_request != NULL) 2905bfff6873SLukas Czerner goto out; 2906bfff6873SLukas Czerner 2907bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2908bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 2909bfff6873SLukas Czerner !test_opt(sb, INIT_INODE_TABLE)) { 2910bfff6873SLukas Czerner sbi->s_li_request = NULL; 2911bfff6873SLukas Czerner goto out; 2912bfff6873SLukas Czerner } 2913bfff6873SLukas Czerner 2914bfff6873SLukas Czerner if (first_not_zeroed == ngroups) { 2915bfff6873SLukas Czerner sbi->s_li_request = NULL; 2916bfff6873SLukas Czerner goto out; 2917bfff6873SLukas Czerner } 2918bfff6873SLukas Czerner 2919bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2920bfff6873SLukas Czerner if (!elr) { 2921bfff6873SLukas Czerner ret = -ENOMEM; 2922bfff6873SLukas Czerner goto out; 2923bfff6873SLukas Czerner } 2924bfff6873SLukas Czerner 2925bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2926bfff6873SLukas Czerner 2927bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2928bfff6873SLukas Czerner ret = ext4_li_info_new(); 2929bfff6873SLukas Czerner if (ret) 2930bfff6873SLukas Czerner goto out; 2931bfff6873SLukas Czerner } 2932bfff6873SLukas Czerner 2933bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2934bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2935bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2936bfff6873SLukas Czerner 2937bfff6873SLukas Czerner sbi->s_li_request = elr; 2938bfff6873SLukas Czerner 2939bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2940bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2941bfff6873SLukas Czerner if (ret) 2942bfff6873SLukas Czerner goto out; 2943bfff6873SLukas Czerner } 2944bfff6873SLukas Czerner 2945bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2946bfff6873SLukas Czerner 2947bfff6873SLukas Czerner out: 2948bfff6873SLukas Czerner if (ret) { 2949bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2950bfff6873SLukas Czerner kfree(elr); 2951bfff6873SLukas Czerner } 2952bfff6873SLukas Czerner return ret; 2953bfff6873SLukas Czerner } 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner /* 2956bfff6873SLukas Czerner * We do not need to lock anything since this is called on 2957bfff6873SLukas Czerner * module unload. 2958bfff6873SLukas Czerner */ 2959bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 2960bfff6873SLukas Czerner { 2961bfff6873SLukas Czerner /* 2962bfff6873SLukas Czerner * If thread exited earlier 2963bfff6873SLukas Czerner * there's nothing to be done. 2964bfff6873SLukas Czerner */ 2965bfff6873SLukas Czerner if (!ext4_li_info) 2966bfff6873SLukas Czerner return; 2967bfff6873SLukas Czerner 2968bfff6873SLukas Czerner ext4_clear_request_list(); 2969bfff6873SLukas Czerner 2970bfff6873SLukas Czerner while (ext4_li_info->li_task) { 2971bfff6873SLukas Czerner wake_up(&ext4_li_info->li_wait_daemon); 2972bfff6873SLukas Czerner wait_event(ext4_li_info->li_wait_task, 2973bfff6873SLukas Czerner ext4_li_info->li_task == NULL); 2974bfff6873SLukas Czerner } 2975bfff6873SLukas Czerner } 2976bfff6873SLukas Czerner 2977617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 29787477827fSAneesh Kumar K.V __releases(kernel_lock) 29797477827fSAneesh Kumar K.V __acquires(kernel_lock) 2980ac27a0ecSDave Kleikamp { 2981d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 2982ac27a0ecSDave Kleikamp struct buffer_head *bh; 2983617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2984617ba13bSMingming Cao struct ext4_sb_info *sbi; 2985617ba13bSMingming Cao ext4_fsblk_t block; 2986617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 298770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2988ac27a0ecSDave Kleikamp unsigned long offset = 0; 2989ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2990ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2991ac27a0ecSDave Kleikamp struct inode *root; 29929f6200bbSTheodore Ts'o char *cp; 29930390131bSFrank Mayhar const char *descr; 2994dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 2995ac27a0ecSDave Kleikamp int blocksize; 29964ec11028STheodore Ts'o unsigned int db_count; 29974ec11028STheodore Ts'o unsigned int i; 2998f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2999bd81d8eeSLaurent Vivier __u64 blocks_count; 3000833f4077SPeter Zijlstra int err; 3001b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3002bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3003ac27a0ecSDave Kleikamp 3004ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3005ac27a0ecSDave Kleikamp if (!sbi) 3006dcc7dae3SCyrill Gorcunov goto out_free_orig; 3007705895b6SPekka Enberg 3008705895b6SPekka Enberg sbi->s_blockgroup_lock = 3009705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3010705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3011705895b6SPekka Enberg kfree(sbi); 3012dcc7dae3SCyrill Gorcunov goto out_free_orig; 3013705895b6SPekka Enberg } 3014ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3015ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3016617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3017617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3018240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3019d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3020f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3021f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3022f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3023ac27a0ecSDave Kleikamp 3024ac27a0ecSDave Kleikamp unlock_kernel(); 3025ac27a0ecSDave Kleikamp 30269f6200bbSTheodore Ts'o /* Cleanup superblock name */ 30279f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 30289f6200bbSTheodore Ts'o *cp = '!'; 30299f6200bbSTheodore Ts'o 3030dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3031617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3032ac27a0ecSDave Kleikamp if (!blocksize) { 3033b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3034ac27a0ecSDave Kleikamp goto out_fail; 3035ac27a0ecSDave Kleikamp } 3036ac27a0ecSDave Kleikamp 3037ac27a0ecSDave Kleikamp /* 3038617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3039ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3040ac27a0ecSDave Kleikamp */ 3041617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 304270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 304370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3044ac27a0ecSDave Kleikamp } else { 304570bbb3e0SAndrew Morton logical_sb_block = sb_block; 3046ac27a0ecSDave Kleikamp } 3047ac27a0ecSDave Kleikamp 304870bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3049b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3050ac27a0ecSDave Kleikamp goto out_fail; 3051ac27a0ecSDave Kleikamp } 3052ac27a0ecSDave Kleikamp /* 3053ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3054617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3055ac27a0ecSDave Kleikamp */ 3056617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3057ac27a0ecSDave Kleikamp sbi->s_es = es; 3058ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3059617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3060617ba13bSMingming Cao goto cantfind_ext4; 3061afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3062ac27a0ecSDave Kleikamp 3063ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3064ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3065bfff6873SLukas Czerner set_opt(sbi->s_mount_opt, INIT_INODE_TABLE); 3066617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3067ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 3068437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3069437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3070437ca0fdSDmitry Monakhov "2.6.38"); 3071ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 3072437ca0fdSDmitry Monakhov } 3073617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3074ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 307503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3076617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 3077ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 30782e7842b8SHugh Dickins #endif 307903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3080617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 3081ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 30822e7842b8SHugh Dickins #endif 3083617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3084482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, JOURNAL_DATA); 3085617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3086482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, ORDERED_DATA); 3087617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3088482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 3089ac27a0ecSDave Kleikamp 3090617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3091ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 3092bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3093ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 3094bb4f397aSAneesh Kumar K.V else 3095bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 30968b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 30978b67f04aSTheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 30988b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 30998b67f04aSTheodore Ts'o set_opt(sbi->s_mount_opt, DISCARD); 3100ac27a0ecSDave Kleikamp 3101ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3102ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 310330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 310430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 310530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3106ac27a0ecSDave Kleikamp 31078b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3108571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 3109ac27a0ecSDave Kleikamp 31101e2462f9SMingming Cao /* 3111dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3112dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3113dd919b98SAneesh Kumar K.V */ 31148b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 31158b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3116dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 3117dd919b98SAneesh Kumar K.V 31188b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 31198b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 31208b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 31218b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 31228b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 31238b67f04aSTheodore Ts'o } 3124b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3125b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3126ac27a0ecSDave Kleikamp goto failed_mount; 3127ac27a0ecSDave Kleikamp 3128ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3129482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3130ac27a0ecSDave Kleikamp 3131617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3132617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3133617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3134617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3135b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3136b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3137b31e1552SEric Sandeen "running e2fsck is recommended"); 3138469108ffSTheodore Tso 3139469108ffSTheodore Tso /* 3140ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3141ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3142ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3143ac27a0ecSDave Kleikamp */ 3144a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3145ac27a0ecSDave Kleikamp goto failed_mount; 3146a13fb1a4SEric Sandeen 3147ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3148ac27a0ecSDave Kleikamp 3149617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3150617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3151b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3152b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3153ac27a0ecSDave Kleikamp goto failed_mount; 3154ac27a0ecSDave Kleikamp } 3155ac27a0ecSDave Kleikamp 3156ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3157ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3158ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3159b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3160ce40733cSAneesh Kumar K.V blocksize); 3161ac27a0ecSDave Kleikamp goto failed_mount; 3162ac27a0ecSDave Kleikamp } 3163ac27a0ecSDave Kleikamp 3164ac27a0ecSDave Kleikamp brelse(bh); 316570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 316670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 316770bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3168ac27a0ecSDave Kleikamp if (!bh) { 3169b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3170b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3171ac27a0ecSDave Kleikamp goto failed_mount; 3172ac27a0ecSDave Kleikamp } 3173617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3174ac27a0ecSDave Kleikamp sbi->s_es = es; 3175617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3176b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3177b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3178ac27a0ecSDave Kleikamp goto failed_mount; 3179ac27a0ecSDave Kleikamp } 3180ac27a0ecSDave Kleikamp } 3181ac27a0ecSDave Kleikamp 3182a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3183a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3184f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3185f287a1a5STheodore Ts'o has_huge_files); 3186f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3187ac27a0ecSDave Kleikamp 3188617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3189617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3190617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3191ac27a0ecSDave Kleikamp } else { 3192ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3193ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3194617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 31951330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3196ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3197b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3198b31e1552SEric Sandeen "unsupported inode size: %d", 3199ac27a0ecSDave Kleikamp sbi->s_inode_size); 3200ac27a0ecSDave Kleikamp goto failed_mount; 3201ac27a0ecSDave Kleikamp } 3202ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3203ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3204ac27a0ecSDave Kleikamp } 32050b8e58a1SAndreas Dilger 32060d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 32070d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 32088fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 32090d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3210d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3211b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3212b31e1552SEric Sandeen "unsupported descriptor size %lu", 32130d1ee42fSAlexandre Ratchov sbi->s_desc_size); 32140d1ee42fSAlexandre Ratchov goto failed_mount; 32150d1ee42fSAlexandre Ratchov } 32160d1ee42fSAlexandre Ratchov } else 32170d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 32180b8e58a1SAndreas Dilger 3219ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3220ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3221b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3222617ba13bSMingming Cao goto cantfind_ext4; 32230b8e58a1SAndreas Dilger 3224617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3225ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3226617ba13bSMingming Cao goto cantfind_ext4; 3227ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3228ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 32290d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3230ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3231ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3232e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3233e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 32340b8e58a1SAndreas Dilger 3235ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3236ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3237ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3238f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3239f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3240f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3241f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3242f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3243f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3244f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3245f99b2589STheodore Ts'o #else 3246f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3247f99b2589STheodore Ts'o #endif 3248f99b2589STheodore Ts'o sb->s_dirt = 1; 3249f99b2589STheodore Ts'o } 3250ac27a0ecSDave Kleikamp 3251ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3252b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3253b31e1552SEric Sandeen "#blocks per group too big: %lu", 3254ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3255ac27a0ecSDave Kleikamp goto failed_mount; 3256ac27a0ecSDave Kleikamp } 3257ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3258b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3259b31e1552SEric Sandeen "#inodes per group too big: %lu", 3260ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3261ac27a0ecSDave Kleikamp goto failed_mount; 3262ac27a0ecSDave Kleikamp } 3263ac27a0ecSDave Kleikamp 3264bf43d84bSEric Sandeen /* 3265bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3266bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3267bf43d84bSEric Sandeen */ 3268bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 3269bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 3270bf43d84bSEric Sandeen (ext4_blocks_count(es) > 3271bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 3272b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3273bf43d84bSEric Sandeen " too large to mount safely on this system"); 3274ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 327590c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3276bf43d84bSEric Sandeen ret = -EFBIG; 3277ac27a0ecSDave Kleikamp goto failed_mount; 3278ac27a0ecSDave Kleikamp } 3279ac27a0ecSDave Kleikamp 3280617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3281617ba13bSMingming Cao goto cantfind_ext4; 3282e7c95593SEric Sandeen 32830f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 32840f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 32850f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3286b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3287b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 32880f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 32890f2ddca6SFrom: Thiemo Nagel goto failed_mount; 32900f2ddca6SFrom: Thiemo Nagel } 32910f2ddca6SFrom: Thiemo Nagel 32924ec11028STheodore Ts'o /* 32934ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 32944ec11028STheodore Ts'o * of the filesystem. 32954ec11028STheodore Ts'o */ 32964ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3297b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 3298b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3299e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 33004ec11028STheodore Ts'o ext4_blocks_count(es)); 3301e7c95593SEric Sandeen goto failed_mount; 3302e7c95593SEric Sandeen } 3303bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3304bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3305bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3306bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 33074ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3308b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 33094ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3310b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 33114ec11028STheodore Ts'o ext4_blocks_count(es), 33124ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 33134ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 33144ec11028STheodore Ts'o goto failed_mount; 33154ec11028STheodore Ts'o } 3316bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3317fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3318fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3319617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3320617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3321ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 3322ac27a0ecSDave Kleikamp GFP_KERNEL); 3323ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3325ac27a0ecSDave Kleikamp goto failed_mount; 3326ac27a0ecSDave Kleikamp } 3327ac27a0ecSDave Kleikamp 33283244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 33299f6200bbSTheodore Ts'o if (ext4_proc_root) 33309f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 33313244fcb1SAlexander Beregalov #endif 3332240799cdSTheodore Ts'o 3333705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3334ac27a0ecSDave Kleikamp 3335ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 333670bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3337ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3338ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3339b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3340b31e1552SEric Sandeen "can't read group descriptor %d", i); 3341ac27a0ecSDave Kleikamp db_count = i; 3342ac27a0ecSDave Kleikamp goto failed_mount2; 3343ac27a0ecSDave Kleikamp } 3344ac27a0ecSDave Kleikamp } 3345bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3346b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3347ac27a0ecSDave Kleikamp goto failed_mount2; 3348ac27a0ecSDave Kleikamp } 3349772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3350772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3351b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3352b31e1552SEric Sandeen "unable to initialize " 3353b31e1552SEric Sandeen "flex_bg meta info!"); 3354772cb7c8SJose R. Santos goto failed_mount2; 3355772cb7c8SJose R. Santos } 3356772cb7c8SJose R. Santos 3357ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3358ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3359ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3360ac27a0ecSDave Kleikamp 3361c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 336255138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3363c9de560dSAlex Tomas 3364ac27a0ecSDave Kleikamp /* 3365ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3366ac27a0ecSDave Kleikamp */ 33679ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 33689ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3369617ba13bSMingming Cao sb->s_op = &ext4_sops; 33709ca92389STheodore Ts'o else 33719ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3372617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3373617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3374ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3375617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3376617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3377ac27a0ecSDave Kleikamp #endif 3378ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 33793b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 338032ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 3381ac27a0ecSDave Kleikamp 3382ac27a0ecSDave Kleikamp sb->s_root = NULL; 3383ac27a0ecSDave Kleikamp 3384ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3385617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3386617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3387ac27a0ecSDave Kleikamp 3388ac27a0ecSDave Kleikamp /* 3389ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3390ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3391ac27a0ecSDave Kleikamp */ 3392ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3393617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3394617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3395ac27a0ecSDave Kleikamp goto failed_mount3; 33960390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 33970390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3398b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3399b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3400744692dcSJiaying Zhang goto failed_mount_wq; 3401ac27a0ecSDave Kleikamp } else { 34020390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 34030390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 34040390131bSFrank Mayhar sbi->s_journal = NULL; 34050390131bSFrank Mayhar needs_recovery = 0; 34060390131bSFrank Mayhar goto no_journal; 3407ac27a0ecSDave Kleikamp } 3408ac27a0ecSDave Kleikamp 3409eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3410eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3411eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3412b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3413744692dcSJiaying Zhang goto failed_mount_wq; 3414eb40a09cSJose R. Santos } 3415eb40a09cSJose R. Santos 3416d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3417d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3418d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3419d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3420d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3421818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3422818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3423818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3424818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3425d4da6c9cSLinus Torvalds } else { 3426d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3427d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3428d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3429d4da6c9cSLinus Torvalds } 3430818d276cSGirish Shilamkar 3431ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3432ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3433ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3434ac27a0ecSDave Kleikamp case 0: 3435ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 343663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 343763f57933SAndrew Morton * cope, else JOURNAL_DATA 343863f57933SAndrew Morton */ 3439dab291afSMingming Cao if (jbd2_journal_check_available_features 3440dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3441ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 3442ac27a0ecSDave Kleikamp else 3443ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 3444ac27a0ecSDave Kleikamp break; 3445ac27a0ecSDave Kleikamp 3446617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3447617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3448dab291afSMingming Cao if (!jbd2_journal_check_available_features 3449dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3451b31e1552SEric Sandeen "requested data journaling mode"); 3452744692dcSJiaying Zhang goto failed_mount_wq; 3453ac27a0ecSDave Kleikamp } 3454ac27a0ecSDave Kleikamp default: 3455ac27a0ecSDave Kleikamp break; 3456ac27a0ecSDave Kleikamp } 3457b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3458ac27a0ecSDave Kleikamp 34590390131bSFrank Mayhar no_journal: 346084061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_freeblocks_counter, 346184061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 346284061e07SDmitry Monakhov if (!err) 346384061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_freeinodes_counter, 346484061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 346584061e07SDmitry Monakhov if (!err) 346684061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_dirs_counter, 346784061e07SDmitry Monakhov ext4_count_dirs(sb)); 346884061e07SDmitry Monakhov if (!err) 346984061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 347084061e07SDmitry Monakhov if (err) { 347184061e07SDmitry Monakhov ext4_msg(sb, KERN_ERR, "insufficient memory"); 347284061e07SDmitry Monakhov goto failed_mount_wq; 347384061e07SDmitry Monakhov } 3474206f7ab4SChristoph Hellwig 34754c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 34764c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 34774c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 34784c0425ffSMingming Cao goto failed_mount_wq; 34794c0425ffSMingming Cao } 34804c0425ffSMingming Cao 3481ac27a0ecSDave Kleikamp /* 3482dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3483ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3484ac27a0ecSDave Kleikamp */ 3485ac27a0ecSDave Kleikamp 34861d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 34871d1fe1eeSDavid Howells if (IS_ERR(root)) { 3488b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 34891d1fe1eeSDavid Howells ret = PTR_ERR(root); 3490ac27a0ecSDave Kleikamp goto failed_mount4; 3491ac27a0ecSDave Kleikamp } 3492ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 34931d1fe1eeSDavid Howells iput(root); 3494b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3495ac27a0ecSDave Kleikamp goto failed_mount4; 3496ac27a0ecSDave Kleikamp } 34971d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 34981d1fe1eeSDavid Howells if (!sb->s_root) { 3499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 35001d1fe1eeSDavid Howells iput(root); 35011d1fe1eeSDavid Howells ret = -ENOMEM; 35021d1fe1eeSDavid Howells goto failed_mount4; 35031d1fe1eeSDavid Howells } 3504ac27a0ecSDave Kleikamp 3505617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3506ef7f3835SKalpak Shah 3507ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3508ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3509ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3510ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3511ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3512ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3513ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3514ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3515ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3516ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3517ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3518ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3519ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3520ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3521ef7f3835SKalpak Shah } 3522ef7f3835SKalpak Shah } 3523ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3524ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3525ef7f3835SKalpak Shah sbi->s_inode_size) { 3526ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3527ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3528b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3529b31e1552SEric Sandeen "available"); 3530ef7f3835SKalpak Shah } 3531ef7f3835SKalpak Shah 353290576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 353390576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 3534b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 3535b31e1552SEric Sandeen "requested data journaling mode"); 3536c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 353790576c0bSTheodore Ts'o } 3538744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 3539744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 3540744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3541744692dcSJiaying Zhang "option - requested data journaling mode"); 3542744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 3543744692dcSJiaying Zhang } 3544744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 3545744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3546744692dcSJiaying Zhang "option - block size is too small"); 3547744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 3548744692dcSJiaying Zhang } 3549744692dcSJiaying Zhang } 3550c2774d84SAneesh Kumar K.V 35516fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 35526fd058f7STheodore Ts'o if (err) { 3553b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3554fbe845ddSCurt Wohlgemuth "zone (%d)", err); 35556fd058f7STheodore Ts'o goto failed_mount4; 35566fd058f7STheodore Ts'o } 35576fd058f7STheodore Ts'o 3558c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3559c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3560c2774d84SAneesh Kumar K.V if (err) { 3561421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3562c2774d84SAneesh Kumar K.V err); 3563c2774d84SAneesh Kumar K.V goto failed_mount4; 3564c2774d84SAneesh Kumar K.V } 3565c2774d84SAneesh Kumar K.V 3566bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3567bfff6873SLukas Czerner if (err) 3568bfff6873SLukas Czerner goto failed_mount4; 3569bfff6873SLukas Czerner 35703197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 35713197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 35723197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 35733197ebdbSTheodore Ts'o "%s", sb->s_id); 35743197ebdbSTheodore Ts'o if (err) { 35753197ebdbSTheodore Ts'o ext4_mb_release(sb); 35763197ebdbSTheodore Ts'o ext4_ext_release(sb); 35773197ebdbSTheodore Ts'o goto failed_mount4; 35783197ebdbSTheodore Ts'o }; 35793197ebdbSTheodore Ts'o 3580617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3581617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3582617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 35830390131bSFrank Mayhar if (needs_recovery) { 3584b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3585617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 35860390131bSFrank Mayhar } 35870390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 35880390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 35890390131bSFrank Mayhar descr = " journalled data mode"; 35900390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 35910390131bSFrank Mayhar descr = " ordered data mode"; 35920390131bSFrank Mayhar else 35930390131bSFrank Mayhar descr = " writeback data mode"; 35940390131bSFrank Mayhar } else 35950390131bSFrank Mayhar descr = "out journal"; 35960390131bSFrank Mayhar 3597d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 35988b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 35998b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3600ac27a0ecSDave Kleikamp 360166e61a9eSTheodore Ts'o init_timer(&sbi->s_err_report); 360266e61a9eSTheodore Ts'o sbi->s_err_report.function = print_daily_error_info; 360366e61a9eSTheodore Ts'o sbi->s_err_report.data = (unsigned long) sb; 360466e61a9eSTheodore Ts'o if (es->s_error_count) 360566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3606ac27a0ecSDave Kleikamp 3607ac27a0ecSDave Kleikamp lock_kernel(); 3608d4c402d9SCurt Wohlgemuth kfree(orig_data); 3609ac27a0ecSDave Kleikamp return 0; 3610ac27a0ecSDave Kleikamp 3611617ba13bSMingming Cao cantfind_ext4: 3612ac27a0ecSDave Kleikamp if (!silent) 3613b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3614ac27a0ecSDave Kleikamp goto failed_mount; 3615ac27a0ecSDave Kleikamp 3616ac27a0ecSDave Kleikamp failed_mount4: 3617b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 36184c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 36194c0425ffSMingming Cao failed_mount_wq: 36206fd058f7STheodore Ts'o ext4_release_system_zone(sb); 36210390131bSFrank Mayhar if (sbi->s_journal) { 3622dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 362347b4a50bSJan Kara sbi->s_journal = NULL; 36240390131bSFrank Mayhar } 362584061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_freeblocks_counter); 362684061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_freeinodes_counter); 362784061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_dirs_counter); 362884061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3629ac27a0ecSDave Kleikamp failed_mount3: 3630c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3631c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3632c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3633c5ca7c76STheodore Ts'o else 3634c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3635c5ca7c76STheodore Ts'o } 3636ac27a0ecSDave Kleikamp failed_mount2: 3637ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3638ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3639ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3640ac27a0ecSDave Kleikamp failed_mount: 3641240799cdSTheodore Ts'o if (sbi->s_proc) { 36429f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3643240799cdSTheodore Ts'o } 3644ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3645ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3646ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3647ac27a0ecSDave Kleikamp #endif 3648617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3649ac27a0ecSDave Kleikamp brelse(bh); 3650ac27a0ecSDave Kleikamp out_fail: 3651ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3652f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3653ac27a0ecSDave Kleikamp kfree(sbi); 3654ac27a0ecSDave Kleikamp lock_kernel(); 3655dcc7dae3SCyrill Gorcunov out_free_orig: 3656d4c402d9SCurt Wohlgemuth kfree(orig_data); 36571d1fe1eeSDavid Howells return ret; 3658ac27a0ecSDave Kleikamp } 3659ac27a0ecSDave Kleikamp 3660ac27a0ecSDave Kleikamp /* 3661ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3662ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3663ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3664ac27a0ecSDave Kleikamp */ 3665617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3666ac27a0ecSDave Kleikamp { 3667617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3668ac27a0ecSDave Kleikamp 3669ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 367030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 367130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3672ac27a0ecSDave Kleikamp 3673a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3674ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3675dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3676ac27a0ecSDave Kleikamp else 3677dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 36785bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 36795bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 36805bf5683aSHidehiro Kawai else 36815bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3682a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3683ac27a0ecSDave Kleikamp } 3684ac27a0ecSDave Kleikamp 3685617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3686ac27a0ecSDave Kleikamp unsigned int journal_inum) 3687ac27a0ecSDave Kleikamp { 3688ac27a0ecSDave Kleikamp struct inode *journal_inode; 3689ac27a0ecSDave Kleikamp journal_t *journal; 3690ac27a0ecSDave Kleikamp 36910390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 36920390131bSFrank Mayhar 3693ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3694ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3695ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3696ac27a0ecSDave Kleikamp 36971d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 36981d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3699b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3700ac27a0ecSDave Kleikamp return NULL; 3701ac27a0ecSDave Kleikamp } 3702ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3703ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3704ac27a0ecSDave Kleikamp iput(journal_inode); 3705b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3706ac27a0ecSDave Kleikamp return NULL; 3707ac27a0ecSDave Kleikamp } 3708ac27a0ecSDave Kleikamp 3709e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3710ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 37111d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3712b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3713ac27a0ecSDave Kleikamp iput(journal_inode); 3714ac27a0ecSDave Kleikamp return NULL; 3715ac27a0ecSDave Kleikamp } 3716ac27a0ecSDave Kleikamp 3717dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3718ac27a0ecSDave Kleikamp if (!journal) { 3719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3720ac27a0ecSDave Kleikamp iput(journal_inode); 3721ac27a0ecSDave Kleikamp return NULL; 3722ac27a0ecSDave Kleikamp } 3723ac27a0ecSDave Kleikamp journal->j_private = sb; 3724617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3725ac27a0ecSDave Kleikamp return journal; 3726ac27a0ecSDave Kleikamp } 3727ac27a0ecSDave Kleikamp 3728617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3729ac27a0ecSDave Kleikamp dev_t j_dev) 3730ac27a0ecSDave Kleikamp { 3731ac27a0ecSDave Kleikamp struct buffer_head *bh; 3732ac27a0ecSDave Kleikamp journal_t *journal; 3733617ba13bSMingming Cao ext4_fsblk_t start; 3734617ba13bSMingming Cao ext4_fsblk_t len; 3735ac27a0ecSDave Kleikamp int hblock, blocksize; 3736617ba13bSMingming Cao ext4_fsblk_t sb_block; 3737ac27a0ecSDave Kleikamp unsigned long offset; 3738617ba13bSMingming Cao struct ext4_super_block *es; 3739ac27a0ecSDave Kleikamp struct block_device *bdev; 3740ac27a0ecSDave Kleikamp 37410390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37420390131bSFrank Mayhar 3743b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3744ac27a0ecSDave Kleikamp if (bdev == NULL) 3745ac27a0ecSDave Kleikamp return NULL; 3746ac27a0ecSDave Kleikamp 3747ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3748b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3749b31e1552SEric Sandeen "failed to claim external journal device"); 37509a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3751ac27a0ecSDave Kleikamp return NULL; 3752ac27a0ecSDave Kleikamp } 3753ac27a0ecSDave Kleikamp 3754ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3755e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3756ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3757b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3758b31e1552SEric Sandeen "blocksize too small for journal device"); 3759ac27a0ecSDave Kleikamp goto out_bdev; 3760ac27a0ecSDave Kleikamp } 3761ac27a0ecSDave Kleikamp 3762617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3763617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3764ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3765ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3766b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3767b31e1552SEric Sandeen "external journal"); 3768ac27a0ecSDave Kleikamp goto out_bdev; 3769ac27a0ecSDave Kleikamp } 3770ac27a0ecSDave Kleikamp 3771617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3772617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3773ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3774617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3775b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3776b31e1552SEric Sandeen "bad superblock"); 3777ac27a0ecSDave Kleikamp brelse(bh); 3778ac27a0ecSDave Kleikamp goto out_bdev; 3779ac27a0ecSDave Kleikamp } 3780ac27a0ecSDave Kleikamp 3781617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3782b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3783ac27a0ecSDave Kleikamp brelse(bh); 3784ac27a0ecSDave Kleikamp goto out_bdev; 3785ac27a0ecSDave Kleikamp } 3786ac27a0ecSDave Kleikamp 3787bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3788ac27a0ecSDave Kleikamp start = sb_block + 1; 3789ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3790ac27a0ecSDave Kleikamp 3791dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3792ac27a0ecSDave Kleikamp start, len, blocksize); 3793ac27a0ecSDave Kleikamp if (!journal) { 3794b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3795ac27a0ecSDave Kleikamp goto out_bdev; 3796ac27a0ecSDave Kleikamp } 3797ac27a0ecSDave Kleikamp journal->j_private = sb; 3798ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3799ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3800ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3801b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3802ac27a0ecSDave Kleikamp goto out_journal; 3803ac27a0ecSDave Kleikamp } 3804ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3805b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3806b31e1552SEric Sandeen "user (unsupported) - %d", 3807ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3808ac27a0ecSDave Kleikamp goto out_journal; 3809ac27a0ecSDave Kleikamp } 3810617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3811617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3812ac27a0ecSDave Kleikamp return journal; 38130b8e58a1SAndreas Dilger 3814ac27a0ecSDave Kleikamp out_journal: 3815dab291afSMingming Cao jbd2_journal_destroy(journal); 3816ac27a0ecSDave Kleikamp out_bdev: 3817617ba13bSMingming Cao ext4_blkdev_put(bdev); 3818ac27a0ecSDave Kleikamp return NULL; 3819ac27a0ecSDave Kleikamp } 3820ac27a0ecSDave Kleikamp 3821617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3822617ba13bSMingming Cao struct ext4_super_block *es, 3823ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3824ac27a0ecSDave Kleikamp { 3825ac27a0ecSDave Kleikamp journal_t *journal; 3826ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3827ac27a0ecSDave Kleikamp dev_t journal_dev; 3828ac27a0ecSDave Kleikamp int err = 0; 3829ac27a0ecSDave Kleikamp int really_read_only; 3830ac27a0ecSDave Kleikamp 38310390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38320390131bSFrank Mayhar 3833ac27a0ecSDave Kleikamp if (journal_devnum && 3834ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3835b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3836b31e1552SEric Sandeen "numbers have changed"); 3837ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3838ac27a0ecSDave Kleikamp } else 3839ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3840ac27a0ecSDave Kleikamp 3841ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3842ac27a0ecSDave Kleikamp 3843ac27a0ecSDave Kleikamp /* 3844ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3845ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3846ac27a0ecSDave Kleikamp * can get read-write access to the device. 3847ac27a0ecSDave Kleikamp */ 3848617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3849ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3850b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3851b31e1552SEric Sandeen "required on readonly filesystem"); 3852ac27a0ecSDave Kleikamp if (really_read_only) { 3853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3854b31e1552SEric Sandeen "unavailable, cannot proceed"); 3855ac27a0ecSDave Kleikamp return -EROFS; 3856ac27a0ecSDave Kleikamp } 3857b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3858b31e1552SEric Sandeen "be enabled during recovery"); 3859ac27a0ecSDave Kleikamp } 3860ac27a0ecSDave Kleikamp } 3861ac27a0ecSDave Kleikamp 3862ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3863b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3864b31e1552SEric Sandeen "and inode journals!"); 3865ac27a0ecSDave Kleikamp return -EINVAL; 3866ac27a0ecSDave Kleikamp } 3867ac27a0ecSDave Kleikamp 3868ac27a0ecSDave Kleikamp if (journal_inum) { 3869617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3870ac27a0ecSDave Kleikamp return -EINVAL; 3871ac27a0ecSDave Kleikamp } else { 3872617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3873ac27a0ecSDave Kleikamp return -EINVAL; 3874ac27a0ecSDave Kleikamp } 3875ac27a0ecSDave Kleikamp 387690576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3877b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 38784776004fSTheodore Ts'o 3879ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3880dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3881ac27a0ecSDave Kleikamp if (err) { 3882b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3883dab291afSMingming Cao jbd2_journal_destroy(journal); 3884ac27a0ecSDave Kleikamp return err; 3885ac27a0ecSDave Kleikamp } 3886ac27a0ecSDave Kleikamp } 3887ac27a0ecSDave Kleikamp 3888617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3889dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 38901c13d5c0STheodore Ts'o if (!err) { 38911c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 38921c13d5c0STheodore Ts'o if (save) 38931c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 38941c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 3895dab291afSMingming Cao err = jbd2_journal_load(journal); 38961c13d5c0STheodore Ts'o if (save) 38971c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 38981c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 38991c13d5c0STheodore Ts'o kfree(save); 39001c13d5c0STheodore Ts'o } 3901ac27a0ecSDave Kleikamp 3902ac27a0ecSDave Kleikamp if (err) { 3903b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3904dab291afSMingming Cao jbd2_journal_destroy(journal); 3905ac27a0ecSDave Kleikamp return err; 3906ac27a0ecSDave Kleikamp } 3907ac27a0ecSDave Kleikamp 3908617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3909617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3910ac27a0ecSDave Kleikamp 3911ac27a0ecSDave Kleikamp if (journal_devnum && 3912ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3913ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3914ac27a0ecSDave Kleikamp 3915ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3916e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3917ac27a0ecSDave Kleikamp } 3918ac27a0ecSDave Kleikamp 3919ac27a0ecSDave Kleikamp return 0; 3920ac27a0ecSDave Kleikamp } 3921ac27a0ecSDave Kleikamp 3922e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3923ac27a0ecSDave Kleikamp { 3924e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3925617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3926c4be0c1dSTakashi Sato int error = 0; 3927ac27a0ecSDave Kleikamp 3928ac27a0ecSDave Kleikamp if (!sbh) 3929c4be0c1dSTakashi Sato return error; 3930914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3931914258bfSTheodore Ts'o /* 3932914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3933914258bfSTheodore Ts'o * superblock failed. This could happen because the 3934914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3935914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3936914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3937914258bfSTheodore Ts'o * write and hope for the best. 3938914258bfSTheodore Ts'o */ 3939b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3940b31e1552SEric Sandeen "superblock detected"); 3941914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3942914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3943914258bfSTheodore Ts'o } 394471290b36STheodore Ts'o /* 394571290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 394671290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 394771290b36STheodore Ts'o * write time when we are mounting the root file system 394871290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 394971290b36STheodore Ts'o * for people who are east of GMT and who make their clock 395071290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 395171290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 395271290b36STheodore Ts'o * to complain and force a full file system check. 395371290b36STheodore Ts'o */ 395471290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3955ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3956f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3957afc32f7eSTheodore Ts'o es->s_kbytes_written = 3958afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3959afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3960afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 3961f613dfcbSTheodore Ts'o else 3962f613dfcbSTheodore Ts'o es->s_kbytes_written = 3963f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 39645d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 39655d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 39665d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 39675d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 39687234ab2aSTheodore Ts'o sb->s_dirt = 0; 3969ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3970ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3971914258bfSTheodore Ts'o if (sync) { 3972c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3973c4be0c1dSTakashi Sato if (error) 3974c4be0c1dSTakashi Sato return error; 3975c4be0c1dSTakashi Sato 3976c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3977c4be0c1dSTakashi Sato if (error) { 3978b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3979b31e1552SEric Sandeen "superblock"); 3980914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3981914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3982914258bfSTheodore Ts'o } 3983914258bfSTheodore Ts'o } 3984c4be0c1dSTakashi Sato return error; 3985ac27a0ecSDave Kleikamp } 3986ac27a0ecSDave Kleikamp 3987ac27a0ecSDave Kleikamp /* 3988ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3989ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3990ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3991ac27a0ecSDave Kleikamp */ 3992617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3993617ba13bSMingming Cao struct ext4_super_block *es) 3994ac27a0ecSDave Kleikamp { 3995617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3996ac27a0ecSDave Kleikamp 39970390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 39980390131bSFrank Mayhar BUG_ON(journal != NULL); 39990390131bSFrank Mayhar return; 40000390131bSFrank Mayhar } 4001dab291afSMingming Cao jbd2_journal_lock_updates(journal); 40027ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 40037ffe1ea8SHidehiro Kawai goto out; 40047ffe1ea8SHidehiro Kawai 4005617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4006ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4007617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4008e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4009ac27a0ecSDave Kleikamp } 40107ffe1ea8SHidehiro Kawai 40117ffe1ea8SHidehiro Kawai out: 4012dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4013ac27a0ecSDave Kleikamp } 4014ac27a0ecSDave Kleikamp 4015ac27a0ecSDave Kleikamp /* 4016ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4017ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4018ac27a0ecSDave Kleikamp * main filesystem now. 4019ac27a0ecSDave Kleikamp */ 4020617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4021617ba13bSMingming Cao struct ext4_super_block *es) 4022ac27a0ecSDave Kleikamp { 4023ac27a0ecSDave Kleikamp journal_t *journal; 4024ac27a0ecSDave Kleikamp int j_errno; 4025ac27a0ecSDave Kleikamp const char *errstr; 4026ac27a0ecSDave Kleikamp 40270390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40280390131bSFrank Mayhar 4029617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4030ac27a0ecSDave Kleikamp 4031ac27a0ecSDave Kleikamp /* 4032ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4033617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4034ac27a0ecSDave Kleikamp */ 4035ac27a0ecSDave Kleikamp 4036dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4037ac27a0ecSDave Kleikamp if (j_errno) { 4038ac27a0ecSDave Kleikamp char nbuf[16]; 4039ac27a0ecSDave Kleikamp 4040617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 404112062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4042ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 404312062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4044ac27a0ecSDave Kleikamp 4045617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4046617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4047e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4048ac27a0ecSDave Kleikamp 4049dab291afSMingming Cao jbd2_journal_clear_err(journal); 4050ac27a0ecSDave Kleikamp } 4051ac27a0ecSDave Kleikamp } 4052ac27a0ecSDave Kleikamp 4053ac27a0ecSDave Kleikamp /* 4054ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4055ac27a0ecSDave Kleikamp * and wait on the commit. 4056ac27a0ecSDave Kleikamp */ 4057617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4058ac27a0ecSDave Kleikamp { 4059ac27a0ecSDave Kleikamp journal_t *journal; 40600390131bSFrank Mayhar int ret = 0; 4061ac27a0ecSDave Kleikamp 4062ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4063ac27a0ecSDave Kleikamp return 0; 4064ac27a0ecSDave Kleikamp 4065617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 40666b0310fbSEric Sandeen if (journal) { 4067437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4068617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 40696b0310fbSEric Sandeen } 40700390131bSFrank Mayhar 4071ac27a0ecSDave Kleikamp return ret; 4072ac27a0ecSDave Kleikamp } 4073ac27a0ecSDave Kleikamp 4074617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4075ac27a0ecSDave Kleikamp { 4076ebc1ac16SChristoph Hellwig lock_super(sb); 4077e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4078ebc1ac16SChristoph Hellwig unlock_super(sb); 40790390131bSFrank Mayhar } 4080ac27a0ecSDave Kleikamp 4081617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4082ac27a0ecSDave Kleikamp { 408314ce0cb4STheodore Ts'o int ret = 0; 40849eddacf9SJan Kara tid_t target; 40858d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4086ac27a0ecSDave Kleikamp 40879bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 40888d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 40898d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4090ac27a0ecSDave Kleikamp if (wait) 40918d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 40920390131bSFrank Mayhar } 409314ce0cb4STheodore Ts'o return ret; 4094ac27a0ecSDave Kleikamp } 4095ac27a0ecSDave Kleikamp 4096ac27a0ecSDave Kleikamp /* 4097ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4098ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4099ac27a0ecSDave Kleikamp */ 4100c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4101ac27a0ecSDave Kleikamp { 4102c4be0c1dSTakashi Sato int error = 0; 4103c4be0c1dSTakashi Sato journal_t *journal; 4104ac27a0ecSDave Kleikamp 41059ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41069ca92389STheodore Ts'o return 0; 41079ca92389STheodore Ts'o 4108c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4109ac27a0ecSDave Kleikamp 4110ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4111dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41127ffe1ea8SHidehiro Kawai 41137ffe1ea8SHidehiro Kawai /* 41149ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 41159ca92389STheodore Ts'o * the journal. 41167ffe1ea8SHidehiro Kawai */ 4117c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 41186b0310fbSEric Sandeen if (error < 0) 41196b0310fbSEric Sandeen goto out; 4120ac27a0ecSDave Kleikamp 4121ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4122617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4123e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 41246b0310fbSEric Sandeen out: 41256b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 41266b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 41276b0310fbSEric Sandeen return error; 4128ac27a0ecSDave Kleikamp } 4129ac27a0ecSDave Kleikamp 4130ac27a0ecSDave Kleikamp /* 4131ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4132ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4133ac27a0ecSDave Kleikamp */ 4134c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4135ac27a0ecSDave Kleikamp { 41369ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41379ca92389STheodore Ts'o return 0; 41389ca92389STheodore Ts'o 4139ac27a0ecSDave Kleikamp lock_super(sb); 41409ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4141617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4142e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4143ac27a0ecSDave Kleikamp unlock_super(sb); 4144c4be0c1dSTakashi Sato return 0; 4145ac27a0ecSDave Kleikamp } 4146ac27a0ecSDave Kleikamp 4147617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4148ac27a0ecSDave Kleikamp { 4149617ba13bSMingming Cao struct ext4_super_block *es; 4150617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4151617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4152ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4153617ba13bSMingming Cao struct ext4_mount_options old_opts; 4154c79d967dSChristoph Hellwig int enable_quota = 0; 41558a266467STheodore Ts'o ext4_group_t g; 4156b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4157ac27a0ecSDave Kleikamp int err; 4158ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4159ac27a0ecSDave Kleikamp int i; 4160ac27a0ecSDave Kleikamp #endif 4161d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4162ac27a0ecSDave Kleikamp 4163337eb00aSAlessio Igor Bogani lock_kernel(); 4164337eb00aSAlessio Igor Bogani 4165ac27a0ecSDave Kleikamp /* Store the original options */ 4166bbd6851aSAl Viro lock_super(sb); 4167ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4168ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4169ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4170ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4171ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 417230773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 417330773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4174ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4175ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4176ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4177ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4178ac27a0ecSDave Kleikamp #endif 4179b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4180b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4181ac27a0ecSDave Kleikamp 4182ac27a0ecSDave Kleikamp /* 4183ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4184ac27a0ecSDave Kleikamp */ 4185b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4186b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4187ac27a0ecSDave Kleikamp err = -EINVAL; 4188ac27a0ecSDave Kleikamp goto restore_opts; 4189ac27a0ecSDave Kleikamp } 4190ac27a0ecSDave Kleikamp 41914ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4192c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4193ac27a0ecSDave Kleikamp 4194ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4195482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4196ac27a0ecSDave Kleikamp 4197ac27a0ecSDave Kleikamp es = sbi->s_es; 4198ac27a0ecSDave Kleikamp 4199b3881f74STheodore Ts'o if (sbi->s_journal) { 4200617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4201b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4202b3881f74STheodore Ts'o } 4203ac27a0ecSDave Kleikamp 4204ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4205bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 42064ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4207ac27a0ecSDave Kleikamp err = -EROFS; 4208ac27a0ecSDave Kleikamp goto restore_opts; 4209ac27a0ecSDave Kleikamp } 4210ac27a0ecSDave Kleikamp 4211ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 42120f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 42130f0dd62fSChristoph Hellwig if (err < 0) 4214c79d967dSChristoph Hellwig goto restore_opts; 4215c79d967dSChristoph Hellwig 4216ac27a0ecSDave Kleikamp /* 4217ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4218ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4219ac27a0ecSDave Kleikamp */ 4220ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4221ac27a0ecSDave Kleikamp 4222ac27a0ecSDave Kleikamp /* 4223ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4224ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4225ac27a0ecSDave Kleikamp * mark the partition as valid again. 4226ac27a0ecSDave Kleikamp */ 4227617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4228617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4229ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4230ac27a0ecSDave Kleikamp 4231a63c9eb2STheodore Ts'o if (sbi->s_journal) 4232617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4233ac27a0ecSDave Kleikamp } else { 4234a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4235a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4236ac27a0ecSDave Kleikamp err = -EROFS; 4237ac27a0ecSDave Kleikamp goto restore_opts; 4238ac27a0ecSDave Kleikamp } 4239ead6596bSEric Sandeen /* 42408a266467STheodore Ts'o * Make sure the group descriptor checksums 42410b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 42428a266467STheodore Ts'o */ 42438a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 42448a266467STheodore Ts'o struct ext4_group_desc *gdp = 42458a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 42468a266467STheodore Ts'o 42478a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4248b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4249b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 42508a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 42518a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 42528a266467STheodore Ts'o err = -EINVAL; 42538a266467STheodore Ts'o goto restore_opts; 42548a266467STheodore Ts'o } 42558a266467STheodore Ts'o } 42568a266467STheodore Ts'o 42578a266467STheodore Ts'o /* 4258ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4259ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4260ead6596bSEric Sandeen * require a full umount/remount for now. 4261ead6596bSEric Sandeen */ 4262ead6596bSEric Sandeen if (es->s_last_orphan) { 4263b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4264ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4265ead6596bSEric Sandeen "orphan inode list. Please " 4266b31e1552SEric Sandeen "umount/remount instead"); 4267ead6596bSEric Sandeen err = -EINVAL; 4268ead6596bSEric Sandeen goto restore_opts; 4269ead6596bSEric Sandeen } 4270ead6596bSEric Sandeen 4271ac27a0ecSDave Kleikamp /* 4272ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4273ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4274ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4275ac27a0ecSDave Kleikamp * the partition.) 4276ac27a0ecSDave Kleikamp */ 42770390131bSFrank Mayhar if (sbi->s_journal) 4278617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4279ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4280617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4281ac27a0ecSDave Kleikamp goto restore_opts; 4282617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4283ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4284c79d967dSChristoph Hellwig enable_quota = 1; 4285ac27a0ecSDave Kleikamp } 4286ac27a0ecSDave Kleikamp } 4287bfff6873SLukas Czerner 4288bfff6873SLukas Czerner /* 4289bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4290bfff6873SLukas Czerner * current settings 4291bfff6873SLukas Czerner */ 4292bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4293bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4294bfff6873SLukas Czerner else { 4295bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4296bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4297bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4298bfff6873SLukas Czerner } 4299bfff6873SLukas Czerner 43006fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 43010390131bSFrank Mayhar if (sbi->s_journal == NULL) 4302e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 43030390131bSFrank Mayhar 4304ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4305ac27a0ecSDave Kleikamp /* Release old quota file names */ 4306ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4307ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4308ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4309ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4310ac27a0ecSDave Kleikamp #endif 4311bbd6851aSAl Viro unlock_super(sb); 4312337eb00aSAlessio Igor Bogani unlock_kernel(); 4313c79d967dSChristoph Hellwig if (enable_quota) 43140f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4315d4c402d9SCurt Wohlgemuth 4316d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4317d4c402d9SCurt Wohlgemuth kfree(orig_data); 4318ac27a0ecSDave Kleikamp return 0; 43190b8e58a1SAndreas Dilger 4320ac27a0ecSDave Kleikamp restore_opts: 4321ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4322ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4323ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4324ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4325ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 432630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 432730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4328ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4329ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4330ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4331ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4332ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4333ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4334ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4335ac27a0ecSDave Kleikamp } 4336ac27a0ecSDave Kleikamp #endif 4337bbd6851aSAl Viro unlock_super(sb); 4338337eb00aSAlessio Igor Bogani unlock_kernel(); 4339d4c402d9SCurt Wohlgemuth kfree(orig_data); 4340ac27a0ecSDave Kleikamp return err; 4341ac27a0ecSDave Kleikamp } 4342ac27a0ecSDave Kleikamp 4343617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4344ac27a0ecSDave Kleikamp { 4345ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4346617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4347617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4348960cc398SPekka Enberg u64 fsid; 4349ac27a0ecSDave Kleikamp 43505e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 43515e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 43526bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 43538df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 43545e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4355ac27a0ecSDave Kleikamp 4356ac27a0ecSDave Kleikamp /* 43575e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 43585e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 43595e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4360ac27a0ecSDave Kleikamp */ 4361ac27a0ecSDave Kleikamp 4362ac27a0ecSDave Kleikamp /* 4363ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4364ac27a0ecSDave Kleikamp * overhead 4365ac27a0ecSDave Kleikamp */ 4366ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 4367ac27a0ecSDave Kleikamp 4368ac27a0ecSDave Kleikamp /* 4369ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 4370ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 4371ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 4372ac27a0ecSDave Kleikamp */ 4373ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4374617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 4375617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 4376ac27a0ecSDave Kleikamp cond_resched(); 4377ac27a0ecSDave Kleikamp } 4378ac27a0ecSDave Kleikamp 4379ac27a0ecSDave Kleikamp /* 4380ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 4381ac27a0ecSDave Kleikamp * bitmap, and an inode table. 4382ac27a0ecSDave Kleikamp */ 43835e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 43845e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 43855e70030dSBadari Pulavarty smp_wmb(); 43866bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4387ac27a0ecSDave Kleikamp } 4388ac27a0ecSDave Kleikamp 4389617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4390ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 43915e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 43926bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 43936bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 4394bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4395bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4396ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4397ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 439852d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4399617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4400960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4401960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4402960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4403960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 44040b8e58a1SAndreas Dilger 4405ac27a0ecSDave Kleikamp return 0; 4406ac27a0ecSDave Kleikamp } 4407ac27a0ecSDave Kleikamp 44080b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 44090b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4410ac27a0ecSDave Kleikamp * Process 1 Process 2 4411617ba13bSMingming Cao * ext4_create() quota_sync() 4412dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4413871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4414dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4415ac27a0ecSDave Kleikamp * 4416ac27a0ecSDave Kleikamp */ 4417ac27a0ecSDave Kleikamp 4418ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4419ac27a0ecSDave Kleikamp 4420ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4421ac27a0ecSDave Kleikamp { 4422ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4423ac27a0ecSDave Kleikamp } 4424ac27a0ecSDave Kleikamp 4425617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4426ac27a0ecSDave Kleikamp { 4427ac27a0ecSDave Kleikamp int ret, err; 4428ac27a0ecSDave Kleikamp handle_t *handle; 4429ac27a0ecSDave Kleikamp struct inode *inode; 4430ac27a0ecSDave Kleikamp 4431ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4432617ba13bSMingming Cao handle = ext4_journal_start(inode, 4433617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4434ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4435ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4436ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4437617ba13bSMingming Cao err = ext4_journal_stop(handle); 4438ac27a0ecSDave Kleikamp if (!ret) 4439ac27a0ecSDave Kleikamp ret = err; 4440ac27a0ecSDave Kleikamp return ret; 4441ac27a0ecSDave Kleikamp } 4442ac27a0ecSDave Kleikamp 4443617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4444ac27a0ecSDave Kleikamp { 4445ac27a0ecSDave Kleikamp int ret, err; 4446ac27a0ecSDave Kleikamp handle_t *handle; 4447ac27a0ecSDave Kleikamp 4448617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4449617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4450ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4451ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4452ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4453617ba13bSMingming Cao err = ext4_journal_stop(handle); 4454ac27a0ecSDave Kleikamp if (!ret) 4455ac27a0ecSDave Kleikamp ret = err; 4456ac27a0ecSDave Kleikamp return ret; 4457ac27a0ecSDave Kleikamp } 4458ac27a0ecSDave Kleikamp 4459617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4460ac27a0ecSDave Kleikamp { 4461ac27a0ecSDave Kleikamp int ret, err; 4462ac27a0ecSDave Kleikamp handle_t *handle; 4463ac27a0ecSDave Kleikamp 4464617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4465617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 44669c3013e9SJan Kara if (IS_ERR(handle)) { 44679c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 44689c3013e9SJan Kara dquot_release(dquot); 4469ac27a0ecSDave Kleikamp return PTR_ERR(handle); 44709c3013e9SJan Kara } 4471ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4472617ba13bSMingming Cao err = ext4_journal_stop(handle); 4473ac27a0ecSDave Kleikamp if (!ret) 4474ac27a0ecSDave Kleikamp ret = err; 4475ac27a0ecSDave Kleikamp return ret; 4476ac27a0ecSDave Kleikamp } 4477ac27a0ecSDave Kleikamp 4478617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4479ac27a0ecSDave Kleikamp { 44802c8be6b2SJan Kara /* Are we journaling quotas? */ 4481617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4482617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4483ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4484617ba13bSMingming Cao return ext4_write_dquot(dquot); 4485ac27a0ecSDave Kleikamp } else { 4486ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4487ac27a0ecSDave Kleikamp } 4488ac27a0ecSDave Kleikamp } 4489ac27a0ecSDave Kleikamp 4490617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4491ac27a0ecSDave Kleikamp { 4492ac27a0ecSDave Kleikamp int ret, err; 4493ac27a0ecSDave Kleikamp handle_t *handle; 4494ac27a0ecSDave Kleikamp 4495ac27a0ecSDave Kleikamp /* Data block + inode block */ 4496617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4497ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4498ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4499ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4500617ba13bSMingming Cao err = ext4_journal_stop(handle); 4501ac27a0ecSDave Kleikamp if (!ret) 4502ac27a0ecSDave Kleikamp ret = err; 4503ac27a0ecSDave Kleikamp return ret; 4504ac27a0ecSDave Kleikamp } 4505ac27a0ecSDave Kleikamp 4506ac27a0ecSDave Kleikamp /* 4507ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4508ac27a0ecSDave Kleikamp * the quota file and such... 4509ac27a0ecSDave Kleikamp */ 4510617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4511ac27a0ecSDave Kleikamp { 4512287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4513617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4514ac27a0ecSDave Kleikamp } 4515ac27a0ecSDave Kleikamp 4516ac27a0ecSDave Kleikamp /* 4517ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4518ac27a0ecSDave Kleikamp */ 4519617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4520307ae18aSChristoph Hellwig char *name) 4521ac27a0ecSDave Kleikamp { 4522ac27a0ecSDave Kleikamp int err; 45238264613dSAl Viro struct path path; 4524ac27a0ecSDave Kleikamp 4525ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4526ac27a0ecSDave Kleikamp return -EINVAL; 45270623543bSJan Kara 45288264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 4529ac27a0ecSDave Kleikamp if (err) 4530ac27a0ecSDave Kleikamp return err; 45310623543bSJan Kara 4532ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 45338264613dSAl Viro if (path.mnt->mnt_sb != sb) { 45348264613dSAl Viro path_put(&path); 4535ac27a0ecSDave Kleikamp return -EXDEV; 4536ac27a0ecSDave Kleikamp } 45370623543bSJan Kara /* Journaling quota? */ 45380623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 45392b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 45408264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 4541b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4542b31e1552SEric Sandeen "Quota file not on filesystem root. " 4543b31e1552SEric Sandeen "Journaled quota will not work"); 45440623543bSJan Kara } 45450623543bSJan Kara 45460623543bSJan Kara /* 45470623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 45480623543bSJan Kara * all updates to the file when we bypass pagecache... 45490623543bSJan Kara */ 45500390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 45510390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 45520623543bSJan Kara /* 45530623543bSJan Kara * We don't need to lock updates but journal_flush() could 45540623543bSJan Kara * otherwise be livelocked... 45550623543bSJan Kara */ 45560623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 45577ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 45580623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 45597ffe1ea8SHidehiro Kawai if (err) { 45608264613dSAl Viro path_put(&path); 45617ffe1ea8SHidehiro Kawai return err; 45627ffe1ea8SHidehiro Kawai } 45630623543bSJan Kara } 45640623543bSJan Kara 4565287a8095SChristoph Hellwig err = dquot_quota_on_path(sb, type, format_id, &path); 45668264613dSAl Viro path_put(&path); 456777e69dacSAl Viro return err; 4568ac27a0ecSDave Kleikamp } 4569ac27a0ecSDave Kleikamp 4570ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4571ca0e05e4SDmitry Monakhov { 4572ca0e05e4SDmitry Monakhov /* Force all delayed allocation blocks to be allocated */ 4573ca0e05e4SDmitry Monakhov if (test_opt(sb, DELALLOC)) { 4574ca0e05e4SDmitry Monakhov down_read(&sb->s_umount); 4575ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4576ca0e05e4SDmitry Monakhov up_read(&sb->s_umount); 4577ca0e05e4SDmitry Monakhov } 4578ca0e05e4SDmitry Monakhov 4579ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4580ca0e05e4SDmitry Monakhov } 4581ca0e05e4SDmitry Monakhov 4582ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4583ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4584ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 4585ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4586617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4587ac27a0ecSDave Kleikamp size_t len, loff_t off) 4588ac27a0ecSDave Kleikamp { 4589ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4590725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4591ac27a0ecSDave Kleikamp int err = 0; 4592ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4593ac27a0ecSDave Kleikamp int tocopy; 4594ac27a0ecSDave Kleikamp size_t toread; 4595ac27a0ecSDave Kleikamp struct buffer_head *bh; 4596ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4597ac27a0ecSDave Kleikamp 4598ac27a0ecSDave Kleikamp if (off > i_size) 4599ac27a0ecSDave Kleikamp return 0; 4600ac27a0ecSDave Kleikamp if (off+len > i_size) 4601ac27a0ecSDave Kleikamp len = i_size-off; 4602ac27a0ecSDave Kleikamp toread = len; 4603ac27a0ecSDave Kleikamp while (toread > 0) { 4604ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4605ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4606617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4607ac27a0ecSDave Kleikamp if (err) 4608ac27a0ecSDave Kleikamp return err; 4609ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4610ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4611ac27a0ecSDave Kleikamp else 4612ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4613ac27a0ecSDave Kleikamp brelse(bh); 4614ac27a0ecSDave Kleikamp offset = 0; 4615ac27a0ecSDave Kleikamp toread -= tocopy; 4616ac27a0ecSDave Kleikamp data += tocopy; 4617ac27a0ecSDave Kleikamp blk++; 4618ac27a0ecSDave Kleikamp } 4619ac27a0ecSDave Kleikamp return len; 4620ac27a0ecSDave Kleikamp } 4621ac27a0ecSDave Kleikamp 4622ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4623ac27a0ecSDave Kleikamp * enough credits) */ 4624617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4625ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4626ac27a0ecSDave Kleikamp { 4627ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4628725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4629ac27a0ecSDave Kleikamp int err = 0; 4630ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4631ac27a0ecSDave Kleikamp struct buffer_head *bh; 4632ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4633ac27a0ecSDave Kleikamp 46340390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4635b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4636b31e1552SEric Sandeen " cancelled because transaction is not started", 46379c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 46389c3013e9SJan Kara return -EIO; 46399c3013e9SJan Kara } 464067eeb568SDmitry Monakhov /* 464167eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 464267eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 464367eeb568SDmitry Monakhov */ 464467eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 464567eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 464667eeb568SDmitry Monakhov " cancelled because not block aligned", 464767eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 464867eeb568SDmitry Monakhov return -EIO; 464967eeb568SDmitry Monakhov } 465067eeb568SDmitry Monakhov 4651ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4652617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4653ac27a0ecSDave Kleikamp if (!bh) 4654ac27a0ecSDave Kleikamp goto out; 4655617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4656ac27a0ecSDave Kleikamp if (err) { 4657ac27a0ecSDave Kleikamp brelse(bh); 4658ac27a0ecSDave Kleikamp goto out; 4659ac27a0ecSDave Kleikamp } 4660ac27a0ecSDave Kleikamp lock_buffer(bh); 466167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4662ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4663ac27a0ecSDave Kleikamp unlock_buffer(bh); 46640390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4665ac27a0ecSDave Kleikamp brelse(bh); 4666ac27a0ecSDave Kleikamp out: 466767eeb568SDmitry Monakhov if (err) { 46684d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4669ac27a0ecSDave Kleikamp return err; 46704d04e4fbSJan Kara } 467167eeb568SDmitry Monakhov if (inode->i_size < off + len) { 467267eeb568SDmitry Monakhov i_size_write(inode, off + len); 4673617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4674ac27a0ecSDave Kleikamp } 4675ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4676617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4677ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 467867eeb568SDmitry Monakhov return len; 4679ac27a0ecSDave Kleikamp } 4680ac27a0ecSDave Kleikamp 4681ac27a0ecSDave Kleikamp #endif 4682ac27a0ecSDave Kleikamp 46830b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 46840b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 4685ac27a0ecSDave Kleikamp { 4686617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 4687ac27a0ecSDave Kleikamp } 4688ac27a0ecSDave Kleikamp 468937f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 469024b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 469124b58424STheodore Ts'o .owner = THIS_MODULE, 469224b58424STheodore Ts'o .name = "ext2", 469324b58424STheodore Ts'o .get_sb = ext4_get_sb, 469424b58424STheodore Ts'o .kill_sb = kill_block_super, 469524b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 469624b58424STheodore Ts'o }; 469724b58424STheodore Ts'o 469824b58424STheodore Ts'o static inline void register_as_ext2(void) 469924b58424STheodore Ts'o { 470024b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 470124b58424STheodore Ts'o if (err) 470224b58424STheodore Ts'o printk(KERN_WARNING 470324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 470424b58424STheodore Ts'o } 470524b58424STheodore Ts'o 470624b58424STheodore Ts'o static inline void unregister_as_ext2(void) 470724b58424STheodore Ts'o { 470824b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 470924b58424STheodore Ts'o } 471051b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 471124b58424STheodore Ts'o #else 471224b58424STheodore Ts'o static inline void register_as_ext2(void) { } 471324b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 471424b58424STheodore Ts'o #endif 471524b58424STheodore Ts'o 471637f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 471724b58424STheodore Ts'o static inline void register_as_ext3(void) 471824b58424STheodore Ts'o { 471924b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 472024b58424STheodore Ts'o if (err) 472124b58424STheodore Ts'o printk(KERN_WARNING 472224b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 472324b58424STheodore Ts'o } 472424b58424STheodore Ts'o 472524b58424STheodore Ts'o static inline void unregister_as_ext3(void) 472624b58424STheodore Ts'o { 472724b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 472824b58424STheodore Ts'o } 472951b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 473024b58424STheodore Ts'o #else 473124b58424STheodore Ts'o static inline void register_as_ext3(void) { } 473224b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 473324b58424STheodore Ts'o #endif 473424b58424STheodore Ts'o 473503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4736ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 473703010a33STheodore Ts'o .name = "ext4", 4738617ba13bSMingming Cao .get_sb = ext4_get_sb, 4739ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4740ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4741ac27a0ecSDave Kleikamp }; 4742ac27a0ecSDave Kleikamp 4743*857ac889SLukas Czerner int __init ext4_init_feat_adverts(void) 4744*857ac889SLukas Czerner { 4745*857ac889SLukas Czerner struct ext4_features *ef; 4746*857ac889SLukas Czerner int ret = -ENOMEM; 4747*857ac889SLukas Czerner 4748*857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4749*857ac889SLukas Czerner if (!ef) 4750*857ac889SLukas Czerner goto out; 4751*857ac889SLukas Czerner 4752*857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4753*857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4754*857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4755*857ac889SLukas Czerner "features"); 4756*857ac889SLukas Czerner if (ret) { 4757*857ac889SLukas Czerner kfree(ef); 4758*857ac889SLukas Czerner goto out; 4759*857ac889SLukas Czerner } 4760*857ac889SLukas Czerner 4761*857ac889SLukas Czerner ext4_feat = ef; 4762*857ac889SLukas Czerner ret = 0; 4763*857ac889SLukas Czerner out: 4764*857ac889SLukas Czerner return ret; 4765*857ac889SLukas Czerner } 4766*857ac889SLukas Czerner 4767617ba13bSMingming Cao static int __init init_ext4_fs(void) 4768ac27a0ecSDave Kleikamp { 4769c9de560dSAlex Tomas int err; 4770c9de560dSAlex Tomas 477112e9b892SDmitry Monakhov ext4_check_flag_values(); 47726fd058f7STheodore Ts'o err = init_ext4_system_zone(); 47736fd058f7STheodore Ts'o if (err) 47746fd058f7STheodore Ts'o return err; 47753197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 47763197ebdbSTheodore Ts'o if (!ext4_kset) 47776fd058f7STheodore Ts'o goto out4; 47789f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4779*857ac889SLukas Czerner 4780*857ac889SLukas Czerner err = ext4_init_feat_adverts(); 4781*857ac889SLukas Czerner 4782c9de560dSAlex Tomas err = init_ext4_mballoc(); 4783ac27a0ecSDave Kleikamp if (err) 47846fd058f7STheodore Ts'o goto out3; 4785c9de560dSAlex Tomas 4786c9de560dSAlex Tomas err = init_ext4_xattr(); 4787c9de560dSAlex Tomas if (err) 4788c9de560dSAlex Tomas goto out2; 4789ac27a0ecSDave Kleikamp err = init_inodecache(); 4790ac27a0ecSDave Kleikamp if (err) 4791ac27a0ecSDave Kleikamp goto out1; 479224b58424STheodore Ts'o register_as_ext2(); 479324b58424STheodore Ts'o register_as_ext3(); 479403010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4795ac27a0ecSDave Kleikamp if (err) 4796ac27a0ecSDave Kleikamp goto out; 4797bfff6873SLukas Czerner 4798bfff6873SLukas Czerner ext4_li_info = NULL; 4799bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 4800ac27a0ecSDave Kleikamp return 0; 4801ac27a0ecSDave Kleikamp out: 480224b58424STheodore Ts'o unregister_as_ext2(); 480324b58424STheodore Ts'o unregister_as_ext3(); 4804ac27a0ecSDave Kleikamp destroy_inodecache(); 4805ac27a0ecSDave Kleikamp out1: 4806617ba13bSMingming Cao exit_ext4_xattr(); 4807c9de560dSAlex Tomas out2: 4808c9de560dSAlex Tomas exit_ext4_mballoc(); 48096fd058f7STheodore Ts'o out3: 4810*857ac889SLukas Czerner kfree(ext4_feat); 48116fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 48126fd058f7STheodore Ts'o kset_unregister(ext4_kset); 48136fd058f7STheodore Ts'o out4: 48146fd058f7STheodore Ts'o exit_ext4_system_zone(); 4815ac27a0ecSDave Kleikamp return err; 4816ac27a0ecSDave Kleikamp } 4817ac27a0ecSDave Kleikamp 4818617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4819ac27a0ecSDave Kleikamp { 4820bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 482124b58424STheodore Ts'o unregister_as_ext2(); 482224b58424STheodore Ts'o unregister_as_ext3(); 482303010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4824ac27a0ecSDave Kleikamp destroy_inodecache(); 4825617ba13bSMingming Cao exit_ext4_xattr(); 4826c9de560dSAlex Tomas exit_ext4_mballoc(); 48279f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 48283197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 48296fd058f7STheodore Ts'o exit_ext4_system_zone(); 4830ac27a0ecSDave Kleikamp } 4831ac27a0ecSDave Kleikamp 4832ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 483383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4834ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4835617ba13bSMingming Cao module_init(init_ext4_fs) 4836617ba13bSMingming Cao module_exit(exit_ext4_fs) 4837