1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 43bfff6873SLukas Czerner #include <linux/kthread.h> 44bfff6873SLukas Czerner #include <linux/freezer.h> 45bfff6873SLukas Czerner 463dcf5451SChristoph Hellwig #include "ext4.h" 473dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 48ac27a0ecSDave Kleikamp #include "xattr.h" 49ac27a0ecSDave Kleikamp #include "acl.h" 503661d286STheodore Ts'o #include "mballoc.h" 51ac27a0ecSDave Kleikamp 529bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 539bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 549bffad1eSTheodore Ts'o 551f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 563197ebdbSTheodore Ts'o static struct kset *ext4_kset; 570b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 580b75a840SLukas Czerner static struct mutex ext4_li_mtx; 590b75a840SLukas Czerner static struct ext4_features *ext4_feat; 609f6200bbSTheodore Ts'o 61617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 62ac27a0ecSDave Kleikamp unsigned long journal_devnum); 63e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 64617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 65617ba13bSMingming Cao struct ext4_super_block *es); 66617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 69617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 70ac27a0ecSDave Kleikamp char nbuf[16]); 71617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 72617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 73c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 74617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 75c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 76152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 77152a0836SAl Viro const char *dev_name, void *data); 78bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 79bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 808f1f7453SEric Sandeen static void ext4_clear_request_list(void); 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", 86152a0836SAl Viro .mount = ext4_mount, 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 { 3920ff2ea7dSJoe Perches struct va_format vaf; 393ac27a0ecSDave Kleikamp va_list args; 394ac27a0ecSDave Kleikamp 395ac27a0ecSDave Kleikamp va_start(args, fmt); 3960ff2ea7dSJoe Perches vaf.fmt = fmt; 3970ff2ea7dSJoe Perches vaf.va = &args; 3980ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 3990ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 400ac27a0ecSDave Kleikamp va_end(args); 401ac27a0ecSDave Kleikamp 402617ba13bSMingming Cao ext4_handle_error(sb); 403ac27a0ecSDave Kleikamp } 404ac27a0ecSDave Kleikamp 405c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 406c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 407273df556SFrank Mayhar const char *fmt, ...) 408273df556SFrank Mayhar { 409273df556SFrank Mayhar va_list args; 410f7c21177STheodore Ts'o struct va_format vaf; 4111c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 412273df556SFrank Mayhar 4131c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4141c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4151c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 416273df556SFrank Mayhar va_start(args, fmt); 417f7c21177STheodore Ts'o vaf.fmt = fmt; 418f7c21177STheodore Ts'o vaf.va = &args; 419c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 420c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 421c398eda0STheodore Ts'o if (block) 422f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 423f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); 424273df556SFrank Mayhar va_end(args); 425273df556SFrank Mayhar 426273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 427273df556SFrank Mayhar } 428273df556SFrank Mayhar 429c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 430f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 431f7c21177STheodore Ts'o const char *fmt, ...) 432273df556SFrank Mayhar { 433273df556SFrank Mayhar va_list args; 434f7c21177STheodore Ts'o struct va_format vaf; 4351c13d5c0STheodore Ts'o struct ext4_super_block *es; 436273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 437273df556SFrank Mayhar char pathname[80], *path; 438273df556SFrank Mayhar 4391c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4401c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4411c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 442273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 443f9a62d09SDan Carpenter if (IS_ERR(path)) 444273df556SFrank Mayhar path = "(unknown)"; 445273df556SFrank Mayhar printk(KERN_CRIT 446f7c21177STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 447f7c21177STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 448f7c21177STheodore Ts'o if (block) 449f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 450f7c21177STheodore Ts'o va_start(args, fmt); 451f7c21177STheodore Ts'o vaf.fmt = fmt; 452f7c21177STheodore Ts'o vaf.va = &args; 453f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); 454273df556SFrank Mayhar va_end(args); 455273df556SFrank Mayhar 456273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 457273df556SFrank Mayhar } 458273df556SFrank Mayhar 459617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 460ac27a0ecSDave Kleikamp char nbuf[16]) 461ac27a0ecSDave Kleikamp { 462ac27a0ecSDave Kleikamp char *errstr = NULL; 463ac27a0ecSDave Kleikamp 464ac27a0ecSDave Kleikamp switch (errno) { 465ac27a0ecSDave Kleikamp case -EIO: 466ac27a0ecSDave Kleikamp errstr = "IO failure"; 467ac27a0ecSDave Kleikamp break; 468ac27a0ecSDave Kleikamp case -ENOMEM: 469ac27a0ecSDave Kleikamp errstr = "Out of memory"; 470ac27a0ecSDave Kleikamp break; 471ac27a0ecSDave Kleikamp case -EROFS: 47278f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 47378f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 474ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 475ac27a0ecSDave Kleikamp else 476ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 477ac27a0ecSDave Kleikamp break; 478ac27a0ecSDave Kleikamp default: 479ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 480ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 481ac27a0ecSDave Kleikamp * NULL. */ 482ac27a0ecSDave Kleikamp if (nbuf) { 483ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 484ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 485ac27a0ecSDave Kleikamp errstr = nbuf; 486ac27a0ecSDave Kleikamp } 487ac27a0ecSDave Kleikamp break; 488ac27a0ecSDave Kleikamp } 489ac27a0ecSDave Kleikamp 490ac27a0ecSDave Kleikamp return errstr; 491ac27a0ecSDave Kleikamp } 492ac27a0ecSDave Kleikamp 493617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 494ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 495ac27a0ecSDave Kleikamp 496c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 497c398eda0STheodore Ts'o unsigned int line, int errno) 498ac27a0ecSDave Kleikamp { 499ac27a0ecSDave Kleikamp char nbuf[16]; 500ac27a0ecSDave Kleikamp const char *errstr; 501ac27a0ecSDave Kleikamp 502ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 503ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 504ac27a0ecSDave Kleikamp * an error. */ 505ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 506ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 507ac27a0ecSDave Kleikamp return; 508ac27a0ecSDave Kleikamp 509617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 510c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 511c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5121c13d5c0STheodore Ts'o save_error_info(sb, function, line); 513ac27a0ecSDave Kleikamp 514617ba13bSMingming Cao ext4_handle_error(sb); 515ac27a0ecSDave Kleikamp } 516ac27a0ecSDave Kleikamp 517ac27a0ecSDave Kleikamp /* 518617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 519ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 520ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 521ac27a0ecSDave Kleikamp * 522ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 523ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 524ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 525ac27a0ecSDave Kleikamp */ 526ac27a0ecSDave Kleikamp 527c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 528c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 529ac27a0ecSDave Kleikamp { 530ac27a0ecSDave Kleikamp va_list args; 531ac27a0ecSDave Kleikamp 5321c13d5c0STheodore Ts'o save_error_info(sb, function, line); 533ac27a0ecSDave Kleikamp va_start(args, fmt); 534c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 535c398eda0STheodore Ts'o function, line); 536ac27a0ecSDave Kleikamp vprintk(fmt, args); 537ac27a0ecSDave Kleikamp printk("\n"); 538ac27a0ecSDave Kleikamp va_end(args); 539ac27a0ecSDave Kleikamp 5401c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 541b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 542ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5434ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 544ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 545dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5461c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5471c13d5c0STheodore Ts'o } 5481c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5491c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 550ac27a0ecSDave Kleikamp } 551ac27a0ecSDave Kleikamp 5520ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 553b31e1552SEric Sandeen { 5540ff2ea7dSJoe Perches struct va_format vaf; 555b31e1552SEric Sandeen va_list args; 556b31e1552SEric Sandeen 557b31e1552SEric Sandeen va_start(args, fmt); 5580ff2ea7dSJoe Perches vaf.fmt = fmt; 5590ff2ea7dSJoe Perches vaf.va = &args; 5600ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 561b31e1552SEric Sandeen va_end(args); 562b31e1552SEric Sandeen } 563b31e1552SEric Sandeen 56412062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 565c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 566ac27a0ecSDave Kleikamp { 5670ff2ea7dSJoe Perches struct va_format vaf; 568ac27a0ecSDave Kleikamp va_list args; 569ac27a0ecSDave Kleikamp 570ac27a0ecSDave Kleikamp va_start(args, fmt); 5710ff2ea7dSJoe Perches vaf.fmt = fmt; 5720ff2ea7dSJoe Perches vaf.va = &args; 5730ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 5740ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 575ac27a0ecSDave Kleikamp va_end(args); 576ac27a0ecSDave Kleikamp } 577ac27a0ecSDave Kleikamp 578e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 579e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 580e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 581e29136f8STheodore Ts'o const char *fmt, ...) 5825d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5835d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5845d1b1b3fSAneesh Kumar K.V { 5850ff2ea7dSJoe Perches struct va_format vaf; 5865d1b1b3fSAneesh Kumar K.V va_list args; 5875d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5885d1b1b3fSAneesh Kumar K.V 5891c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 5901c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5911c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 5920ff2ea7dSJoe Perches 5935d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 5940ff2ea7dSJoe Perches 5950ff2ea7dSJoe Perches vaf.fmt = fmt; 5960ff2ea7dSJoe Perches vaf.va = &args; 597e29136f8STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", 598e29136f8STheodore Ts'o sb->s_id, function, line, grp); 599e29136f8STheodore Ts'o if (ino) 6000ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 601e29136f8STheodore Ts'o if (block) 6020ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 6030ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6045d1b1b3fSAneesh Kumar K.V va_end(args); 6055d1b1b3fSAneesh Kumar K.V 6065d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 607e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6085d1b1b3fSAneesh Kumar K.V return; 6095d1b1b3fSAneesh Kumar K.V } 6101c13d5c0STheodore Ts'o 6115d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6125d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6135d1b1b3fSAneesh Kumar K.V /* 6145d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6155d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6165d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6175d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6185d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 6195d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 6205d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6215d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6225d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6235d1b1b3fSAneesh Kumar K.V */ 6245d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6255d1b1b3fSAneesh Kumar K.V return; 6265d1b1b3fSAneesh Kumar K.V } 6275d1b1b3fSAneesh Kumar K.V 628617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 629ac27a0ecSDave Kleikamp { 630617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 631ac27a0ecSDave Kleikamp 632617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 633ac27a0ecSDave Kleikamp return; 634ac27a0ecSDave Kleikamp 63512062dddSEric Sandeen ext4_warning(sb, 636ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 637ac27a0ecSDave Kleikamp "running e2fsck is recommended", 638617ba13bSMingming Cao EXT4_DYNAMIC_REV); 639ac27a0ecSDave Kleikamp 640617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 641617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 642617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 643ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 644ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 645ac27a0ecSDave Kleikamp 646ac27a0ecSDave Kleikamp /* 647ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 648ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 649ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 650ac27a0ecSDave Kleikamp */ 651ac27a0ecSDave Kleikamp } 652ac27a0ecSDave Kleikamp 653ac27a0ecSDave Kleikamp /* 654ac27a0ecSDave Kleikamp * Open the external journal device 655ac27a0ecSDave Kleikamp */ 656b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 657ac27a0ecSDave Kleikamp { 658ac27a0ecSDave Kleikamp struct block_device *bdev; 659ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 660ac27a0ecSDave Kleikamp 661d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 662ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 663ac27a0ecSDave Kleikamp goto fail; 664ac27a0ecSDave Kleikamp return bdev; 665ac27a0ecSDave Kleikamp 666ac27a0ecSDave Kleikamp fail: 667b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 668ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 669ac27a0ecSDave Kleikamp return NULL; 670ac27a0ecSDave Kleikamp } 671ac27a0ecSDave Kleikamp 672ac27a0ecSDave Kleikamp /* 673ac27a0ecSDave Kleikamp * Release the journal device 674ac27a0ecSDave Kleikamp */ 675617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 676ac27a0ecSDave Kleikamp { 677e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 678ac27a0ecSDave Kleikamp } 679ac27a0ecSDave Kleikamp 680617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 681ac27a0ecSDave Kleikamp { 682ac27a0ecSDave Kleikamp struct block_device *bdev; 683ac27a0ecSDave Kleikamp int ret = -ENODEV; 684ac27a0ecSDave Kleikamp 685ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 686ac27a0ecSDave Kleikamp if (bdev) { 687617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 688ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 689ac27a0ecSDave Kleikamp } 690ac27a0ecSDave Kleikamp return ret; 691ac27a0ecSDave Kleikamp } 692ac27a0ecSDave Kleikamp 693ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 694ac27a0ecSDave Kleikamp { 695617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 696ac27a0ecSDave Kleikamp } 697ac27a0ecSDave Kleikamp 698617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 699ac27a0ecSDave Kleikamp { 700ac27a0ecSDave Kleikamp struct list_head *l; 701ac27a0ecSDave Kleikamp 702b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 703ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 704ac27a0ecSDave Kleikamp 705ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 706ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 707ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 708ac27a0ecSDave Kleikamp printk(KERN_ERR " " 709ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 710ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 711ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 712ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 713ac27a0ecSDave Kleikamp } 714ac27a0ecSDave Kleikamp } 715ac27a0ecSDave Kleikamp 716617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 717ac27a0ecSDave Kleikamp { 718617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 719617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 720ef2cabf7SHidehiro Kawai int i, err; 721ac27a0ecSDave Kleikamp 722857ac889SLukas Czerner ext4_unregister_li_request(sb); 723e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 724e0ccfd95SChristoph Hellwig 7254c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7264c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7274c0425ffSMingming Cao 728a9e220f8SAl Viro lock_super(sb); 7298c85e125SChristoph Hellwig if (sb->s_dirt) 730ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 7318c85e125SChristoph Hellwig 7320390131bSFrank Mayhar if (sbi->s_journal) { 733ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 73447b4a50bSJan Kara sbi->s_journal = NULL; 735ef2cabf7SHidehiro Kawai if (err < 0) 736c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7370390131bSFrank Mayhar } 738d4edac31SJosef Bacik 739a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 740d4edac31SJosef Bacik ext4_release_system_zone(sb); 741d4edac31SJosef Bacik ext4_mb_release(sb); 742d4edac31SJosef Bacik ext4_ext_release(sb); 743d4edac31SJosef Bacik ext4_xattr_put_super(sb); 744d4edac31SJosef Bacik 745ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 746617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 747ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 748e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 749ac27a0ecSDave Kleikamp } 750240799cdSTheodore Ts'o if (sbi->s_proc) { 7519f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 752240799cdSTheodore Ts'o } 7533197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 754ac27a0ecSDave Kleikamp 755ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 756ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 757ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 758c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 759c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 760c5ca7c76STheodore Ts'o else 761772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 762ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 763ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 764ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 7656bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 766ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 767ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 768ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 769ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 770ac27a0ecSDave Kleikamp #endif 771ac27a0ecSDave Kleikamp 772ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 773ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 774ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 775ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 776ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 777ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 778ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 779ac27a0ecSDave Kleikamp 780f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 781ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 782ac27a0ecSDave Kleikamp /* 783ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 784ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 785ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 786ac27a0ecSDave Kleikamp */ 787ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 788f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 789617ba13bSMingming Cao ext4_blkdev_remove(sbi); 790ac27a0ecSDave Kleikamp } 791ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7923197ebdbSTheodore Ts'o /* 7933197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7943197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7953197ebdbSTheodore Ts'o */ 7963197ebdbSTheodore Ts'o unlock_super(sb); 7973197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7983197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 799705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 800ac27a0ecSDave Kleikamp kfree(sbi); 801ac27a0ecSDave Kleikamp } 802ac27a0ecSDave Kleikamp 803e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 804ac27a0ecSDave Kleikamp 805ac27a0ecSDave Kleikamp /* 806ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 807ac27a0ecSDave Kleikamp */ 808617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 809ac27a0ecSDave Kleikamp { 810617ba13bSMingming Cao struct ext4_inode_info *ei; 811ac27a0ecSDave Kleikamp 812e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 813ac27a0ecSDave Kleikamp if (!ei) 814ac27a0ecSDave Kleikamp return NULL; 8150b8e58a1SAndreas Dilger 816ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 81791246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 818a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 819c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 820c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 821d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 822d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 823d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8249d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 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 8298aefcd55STheodore Ts'o ei->jinode = NULL; 830c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 831744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 8328d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 833b436b9beSJan Kara ei->i_sync_tid = 0; 834b436b9beSJan Kara ei->i_datasync_tid = 0; 835f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 836e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 8370b8e58a1SAndreas Dilger 838ac27a0ecSDave Kleikamp return &ei->vfs_inode; 839ac27a0ecSDave Kleikamp } 840ac27a0ecSDave Kleikamp 8417ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 8427ff9c073STheodore Ts'o { 8437ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 8447ff9c073STheodore Ts'o 8457ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 8467ff9c073STheodore Ts'o return drop; 8477ff9c073STheodore Ts'o } 8487ff9c073STheodore Ts'o 849fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 850fa0d7e3dSNick Piggin { 851fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 852fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 853fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 854fa0d7e3dSNick Piggin } 855fa0d7e3dSNick Piggin 856617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 857ac27a0ecSDave Kleikamp { 858f7ad6d2eSTheodore Ts'o ext4_ioend_wait(inode); 8599f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 860b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 861b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 862b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 8639f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 8649f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 8659f7dd93dSVasily Averin true); 8669f7dd93dSVasily Averin dump_stack(); 8679f7dd93dSVasily Averin } 868fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 869ac27a0ecSDave Kleikamp } 870ac27a0ecSDave Kleikamp 87151cc5068SAlexey Dobriyan static void init_once(void *foo) 872ac27a0ecSDave Kleikamp { 873617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 874ac27a0ecSDave Kleikamp 875ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 87603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 877ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 878ac27a0ecSDave Kleikamp #endif 8790e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 880ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 881ac27a0ecSDave Kleikamp } 882ac27a0ecSDave Kleikamp 883ac27a0ecSDave Kleikamp static int init_inodecache(void) 884ac27a0ecSDave Kleikamp { 885617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 886617ba13bSMingming Cao sizeof(struct ext4_inode_info), 887ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 888ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 88920c2df83SPaul Mundt init_once); 890617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 891ac27a0ecSDave Kleikamp return -ENOMEM; 892ac27a0ecSDave Kleikamp return 0; 893ac27a0ecSDave Kleikamp } 894ac27a0ecSDave Kleikamp 895ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 896ac27a0ecSDave Kleikamp { 897617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 898ac27a0ecSDave Kleikamp } 899ac27a0ecSDave Kleikamp 9000930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 901ac27a0ecSDave Kleikamp { 9020930fcc1SAl Viro invalidate_inode_buffers(inode); 9030930fcc1SAl Viro end_writeback(inode); 9049f754758SChristoph Hellwig dquot_drop(inode); 905c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 9068aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9078aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9088aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9098aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9108aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9118aefcd55STheodore Ts'o } 912ac27a0ecSDave Kleikamp } 913ac27a0ecSDave Kleikamp 9142b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 9152b2d6d01STheodore Ts'o struct super_block *sb) 916ac27a0ecSDave Kleikamp { 917ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 918617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 919ac27a0ecSDave Kleikamp 9205a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 9215a20bdfcSJan Kara char *fmtname = ""; 9225a20bdfcSJan Kara 9235a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 9245a20bdfcSJan Kara case QFMT_VFS_OLD: 9255a20bdfcSJan Kara fmtname = "vfsold"; 9265a20bdfcSJan Kara break; 9275a20bdfcSJan Kara case QFMT_VFS_V0: 9285a20bdfcSJan Kara fmtname = "vfsv0"; 9295a20bdfcSJan Kara break; 9305a20bdfcSJan Kara case QFMT_VFS_V1: 9315a20bdfcSJan Kara fmtname = "vfsv1"; 9325a20bdfcSJan Kara break; 9335a20bdfcSJan Kara } 9345a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 9355a20bdfcSJan Kara } 936ac27a0ecSDave Kleikamp 937ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 938ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 939ac27a0ecSDave Kleikamp 940ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 941ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 942ac27a0ecSDave Kleikamp 943482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 944ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 945ac27a0ecSDave Kleikamp 946482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 947ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 948ac27a0ecSDave Kleikamp #endif 949ac27a0ecSDave Kleikamp } 950ac27a0ecSDave Kleikamp 951d9c9bef1SMiklos Szeredi /* 952d9c9bef1SMiklos Szeredi * Show an option if 953d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 954d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 955d9c9bef1SMiklos Szeredi */ 956617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 957ac27a0ecSDave Kleikamp { 958aa22df2cSAneesh Kumar K.V int def_errors; 959aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 960ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 961d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 962d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 963d9c9bef1SMiklos Szeredi 964d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 965aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 966d9c9bef1SMiklos Szeredi 967d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 968d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 969d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 970d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 971aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 972d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 973d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 974d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 975d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 976d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 977d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 978d9c9bef1SMiklos Szeredi } 979d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 980d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 981d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 982d9c9bef1SMiklos Szeredi } 983bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 984d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 985bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 986d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 987bb4f397aSAneesh Kumar K.V } 988bb4f397aSAneesh Kumar K.V } 989aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 990bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 991aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 992d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 993aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 994d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 995aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 996d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 997d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 998d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 99903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1000ea663336SEric Sandeen if (test_opt(sb, XATTR_USER)) 1001d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 1002ea663336SEric Sandeen if (!test_opt(sb, XATTR_USER)) 1003d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 1004d9c9bef1SMiklos Szeredi #endif 100503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1006aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 1007d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 1008d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 1009d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 1010d9c9bef1SMiklos Szeredi #endif 101130773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 1012d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 1013d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 1014d9c9bef1SMiklos Szeredi } 101530773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 101630773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 101730773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 101830773840STheodore Ts'o } 101930773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 102030773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 102130773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 102230773840STheodore Ts'o } 102330773840STheodore Ts'o 1024571640caSEric Sandeen /* 1025571640caSEric Sandeen * We're changing the default of barrier mount option, so 1026571640caSEric Sandeen * let's always display its mount state so it's clear what its 1027571640caSEric Sandeen * status is. 1028571640caSEric Sandeen */ 1029571640caSEric Sandeen seq_puts(seq, ",barrier="); 1030571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1031cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1032cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 103339a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 103439a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 103525ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 103625ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 10378b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 10388b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1039dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1040dd919b98SAneesh Kumar K.V 10416fd7a467STheodore Ts'o if (!test_opt(sb, MBLK_IO_SUBMIT)) 10426fd7a467STheodore Ts'o seq_puts(seq, ",nomblk_io_submit"); 1043cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1044cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1045aa22df2cSAneesh Kumar K.V /* 1046aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1047aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1048aa22df2cSAneesh Kumar K.V */ 1049617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1050ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1051617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1052ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1053617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1054ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1055ac27a0ecSDave Kleikamp 1056240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1057240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1058240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1059240799cdSTheodore Ts'o 10605bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 10615bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 10625bf5683aSHidehiro Kawai 1063afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 106406705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1065afd4672dSTheodore Ts'o 10668b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 10675328e635SEric Sandeen seq_puts(seq, ",discard"); 10685328e635SEric Sandeen 1069e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1070e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1071e3bb52aeSEric Sandeen 1072744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1073744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1074744692dcSJiaying Zhang 10758b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 10768b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 10778b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 10788b67f04aSTheodore Ts'o 1079bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1080bfff6873SLukas Czerner seq_puts(seq, ",noinit_inode_table"); 1081bfff6873SLukas Czerner else if (sbi->s_li_wait_mult) 1082bfff6873SLukas Czerner seq_printf(seq, ",init_inode_table=%u", 1083bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1084bfff6873SLukas Czerner 1085617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 10860b8e58a1SAndreas Dilger 1087ac27a0ecSDave Kleikamp return 0; 1088ac27a0ecSDave Kleikamp } 1089ac27a0ecSDave Kleikamp 10901b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10911b961ac0SChristoph Hellwig u64 ino, u32 generation) 1092ac27a0ecSDave Kleikamp { 1093ac27a0ecSDave Kleikamp struct inode *inode; 1094ac27a0ecSDave Kleikamp 1095617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1096ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1097617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1098ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1099ac27a0ecSDave Kleikamp 1100ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1101ac27a0ecSDave Kleikamp * 1102617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1103ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1104ac27a0ecSDave Kleikamp * 1105ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1106ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1107ac27a0ecSDave Kleikamp */ 11081d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 11091d1fe1eeSDavid Howells if (IS_ERR(inode)) 11101d1fe1eeSDavid Howells return ERR_CAST(inode); 11111d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1112ac27a0ecSDave Kleikamp iput(inode); 1113ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1114ac27a0ecSDave Kleikamp } 11151b961ac0SChristoph Hellwig 11161b961ac0SChristoph Hellwig return inode; 1117ac27a0ecSDave Kleikamp } 11181b961ac0SChristoph Hellwig 11191b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11201b961ac0SChristoph Hellwig int fh_len, int fh_type) 11211b961ac0SChristoph Hellwig { 11221b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11231b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11241b961ac0SChristoph Hellwig } 11251b961ac0SChristoph Hellwig 11261b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11271b961ac0SChristoph Hellwig int fh_len, int fh_type) 11281b961ac0SChristoph Hellwig { 11291b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11301b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1131ac27a0ecSDave Kleikamp } 1132ac27a0ecSDave Kleikamp 1133c39a7f84SToshiyuki Okajima /* 1134c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1135c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1136c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1137c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1138c39a7f84SToshiyuki Okajima */ 11390b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11400b8e58a1SAndreas Dilger gfp_t wait) 1141c39a7f84SToshiyuki Okajima { 1142c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1143c39a7f84SToshiyuki Okajima 1144c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1145c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1146c39a7f84SToshiyuki Okajima return 0; 1147c39a7f84SToshiyuki Okajima if (journal) 1148c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1149c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1150c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1151c39a7f84SToshiyuki Okajima } 1152c39a7f84SToshiyuki Okajima 1153ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1154ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1155ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1156ac27a0ecSDave Kleikamp 1157617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1158617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1159617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1160617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1161617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11626f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1163f00c9e44SJan Kara struct path *path); 1164ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1165617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1166617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1167ac27a0ecSDave Kleikamp size_t len, loff_t off); 1168617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1169ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1170ac27a0ecSDave Kleikamp 117161e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1172a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 117360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1174a9e7f447SDmitry Monakhov #endif 1175617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1176617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1177617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1178617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1179a5b5ee32SJan Kara .write_info = ext4_write_info, 1180a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1181a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1182ac27a0ecSDave Kleikamp }; 1183ac27a0ecSDave Kleikamp 11840d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1185617ba13bSMingming Cao .quota_on = ext4_quota_on, 1186ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1187287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1188287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1189287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1190287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1191287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1192ac27a0ecSDave Kleikamp }; 1193ac27a0ecSDave Kleikamp #endif 1194ac27a0ecSDave Kleikamp 1195ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1196617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1197617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1198617ba13bSMingming Cao .write_inode = ext4_write_inode, 1199617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12007ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12010930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1202617ba13bSMingming Cao .put_super = ext4_put_super, 1203617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1204c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1205c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1206617ba13bSMingming Cao .statfs = ext4_statfs, 1207617ba13bSMingming Cao .remount_fs = ext4_remount, 1208617ba13bSMingming Cao .show_options = ext4_show_options, 1209ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1210617ba13bSMingming Cao .quota_read = ext4_quota_read, 1211617ba13bSMingming Cao .quota_write = ext4_quota_write, 1212ac27a0ecSDave Kleikamp #endif 1213c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1214ac27a0ecSDave Kleikamp }; 1215ac27a0ecSDave Kleikamp 12169ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 12179ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 12189ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 12199ca92389STheodore Ts'o .write_inode = ext4_write_inode, 12209ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 12217ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12220930fcc1SAl Viro .evict_inode = ext4_evict_inode, 12239ca92389STheodore Ts'o .write_super = ext4_write_super, 12249ca92389STheodore Ts'o .put_super = ext4_put_super, 12259ca92389STheodore Ts'o .statfs = ext4_statfs, 12269ca92389STheodore Ts'o .remount_fs = ext4_remount, 12279ca92389STheodore Ts'o .show_options = ext4_show_options, 12289ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12299ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12309ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12319ca92389STheodore Ts'o #endif 12329ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12339ca92389STheodore Ts'o }; 12349ca92389STheodore Ts'o 123539655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12361b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12371b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1238617ba13bSMingming Cao .get_parent = ext4_get_parent, 1239ac27a0ecSDave Kleikamp }; 1240ac27a0ecSDave Kleikamp 1241ac27a0ecSDave Kleikamp enum { 1242ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1243ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 124401436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1245ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 124606705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 124730773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1248c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1249818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1250ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1251296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1252ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12535a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 12545a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 12555a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 12561449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12571449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12585328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1259744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 12605328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1261bfff6873SLukas Czerner Opt_init_inode_table, Opt_noinit_inode_table, 1262ac27a0ecSDave Kleikamp }; 1263ac27a0ecSDave Kleikamp 1264a447c093SSteven Whitehouse static const match_table_t tokens = { 1265ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1266ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1267ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1268ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1269ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1270ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1271ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1272ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1273ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1274ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1275ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1276ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1277ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1278ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1279ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1280ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1281ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1282ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1283ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1284ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1285ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1286e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1287ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1288ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1289ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 129030773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 129130773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1292ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1293ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1294818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1295818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1296ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1297ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1298ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1299ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13005bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13015bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1302ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1303ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1304ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1305ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1306ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1307ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13085a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1309ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1310ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1311ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1312ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1313ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 131406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 131506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 131625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1317c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1318ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 131964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1320dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 13211449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 13221449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 13236fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13246fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1325240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1326b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1327afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 132806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 132906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1330744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1331744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13325328e635SEric Sandeen {Opt_discard, "discard"}, 13335328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1334bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable=%u"}, 1335bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable"}, 1336bfff6873SLukas Czerner {Opt_noinit_inode_table, "noinit_itable"}, 1337f3f12faaSJosef Bacik {Opt_err, NULL}, 1338ac27a0ecSDave Kleikamp }; 1339ac27a0ecSDave Kleikamp 1340617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1341ac27a0ecSDave Kleikamp { 1342617ba13bSMingming Cao ext4_fsblk_t sb_block; 1343ac27a0ecSDave Kleikamp char *options = (char *) *data; 1344ac27a0ecSDave Kleikamp 1345ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1346ac27a0ecSDave Kleikamp return 1; /* Default location */ 13470b8e58a1SAndreas Dilger 1348ac27a0ecSDave Kleikamp options += 3; 13490b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1350ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1351ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13524776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1353ac27a0ecSDave Kleikamp (char *) *data); 1354ac27a0ecSDave Kleikamp return 1; 1355ac27a0ecSDave Kleikamp } 1356ac27a0ecSDave Kleikamp if (*options == ',') 1357ac27a0ecSDave Kleikamp options++; 1358ac27a0ecSDave Kleikamp *data = (void *) options; 13590b8e58a1SAndreas Dilger 1360ac27a0ecSDave Kleikamp return sb_block; 1361ac27a0ecSDave Kleikamp } 1362ac27a0ecSDave Kleikamp 1363b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1364437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1365437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1366b3881f74STheodore Ts'o 136756c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 136856c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 136956c50f11SDmitry Monakhov { 137056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 137156c50f11SDmitry Monakhov char *qname; 137256c50f11SDmitry Monakhov 137356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 137456c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 137556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137656c50f11SDmitry Monakhov "Cannot change journaled " 137756c50f11SDmitry Monakhov "quota options when quota turned on"); 137856c50f11SDmitry Monakhov return 0; 137956c50f11SDmitry Monakhov } 138056c50f11SDmitry Monakhov qname = match_strdup(args); 138156c50f11SDmitry Monakhov if (!qname) { 138256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 138356c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 138456c50f11SDmitry Monakhov return 0; 138556c50f11SDmitry Monakhov } 138656c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 138756c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 138856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 138956c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 139056c50f11SDmitry Monakhov kfree(qname); 139156c50f11SDmitry Monakhov return 0; 139256c50f11SDmitry Monakhov } 139356c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 139456c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 139556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 139656c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 139756c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 139856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 139956c50f11SDmitry Monakhov return 0; 140056c50f11SDmitry Monakhov } 1401fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 140256c50f11SDmitry Monakhov return 1; 140356c50f11SDmitry Monakhov } 140456c50f11SDmitry Monakhov 140556c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 140656c50f11SDmitry Monakhov { 140756c50f11SDmitry Monakhov 140856c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 140956c50f11SDmitry Monakhov 141056c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 141156c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 141256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 141356c50f11SDmitry Monakhov " when quota turned on"); 141456c50f11SDmitry Monakhov return 0; 141556c50f11SDmitry Monakhov } 141656c50f11SDmitry Monakhov /* 141756c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 141856c50f11SDmitry Monakhov * to be correct 141956c50f11SDmitry Monakhov */ 142056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 142156c50f11SDmitry Monakhov return 1; 142256c50f11SDmitry Monakhov } 142356c50f11SDmitry Monakhov #endif 142456c50f11SDmitry Monakhov 1425ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1426c3191067STheodore Ts'o unsigned long *journal_devnum, 1427b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1428617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1429ac27a0ecSDave Kleikamp { 1430617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1431ac27a0ecSDave Kleikamp char *p; 1432ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1433ac27a0ecSDave Kleikamp int data_opt = 0; 1434ac27a0ecSDave Kleikamp int option; 1435ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 143656c50f11SDmitry Monakhov int qfmt; 1437ac27a0ecSDave Kleikamp #endif 1438ac27a0ecSDave Kleikamp 1439ac27a0ecSDave Kleikamp if (!options) 1440ac27a0ecSDave Kleikamp return 1; 1441ac27a0ecSDave Kleikamp 1442ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1443ac27a0ecSDave Kleikamp int token; 1444ac27a0ecSDave Kleikamp if (!*p) 1445ac27a0ecSDave Kleikamp continue; 1446ac27a0ecSDave Kleikamp 144715121c18SEric Sandeen /* 144815121c18SEric Sandeen * Initialize args struct so we know whether arg was 144915121c18SEric Sandeen * found; some options take optional arguments. 145015121c18SEric Sandeen */ 14517dc57615SPeter Huewe args[0].to = args[0].from = NULL; 1452ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1453ac27a0ecSDave Kleikamp switch (token) { 1454ac27a0ecSDave Kleikamp case Opt_bsd_df: 1455437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1456fd8c37ecSTheodore Ts'o clear_opt(sb, MINIX_DF); 1457ac27a0ecSDave Kleikamp break; 1458ac27a0ecSDave Kleikamp case Opt_minix_df: 1459437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1460fd8c37ecSTheodore Ts'o set_opt(sb, MINIX_DF); 1461437ca0fdSDmitry Monakhov 1462ac27a0ecSDave Kleikamp break; 1463ac27a0ecSDave Kleikamp case Opt_grpid: 1464437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1465fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 1466437ca0fdSDmitry Monakhov 1467ac27a0ecSDave Kleikamp break; 1468ac27a0ecSDave Kleikamp case Opt_nogrpid: 1469437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1470fd8c37ecSTheodore Ts'o clear_opt(sb, GRPID); 1471437ca0fdSDmitry Monakhov 1472ac27a0ecSDave Kleikamp break; 1473ac27a0ecSDave Kleikamp case Opt_resuid: 1474ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1475ac27a0ecSDave Kleikamp return 0; 1476ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1477ac27a0ecSDave Kleikamp break; 1478ac27a0ecSDave Kleikamp case Opt_resgid: 1479ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1480ac27a0ecSDave Kleikamp return 0; 1481ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1482ac27a0ecSDave Kleikamp break; 1483ac27a0ecSDave Kleikamp case Opt_sb: 1484ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1485ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1486ac27a0ecSDave Kleikamp break; 1487ac27a0ecSDave Kleikamp case Opt_err_panic: 1488fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1489fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1490fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 1491ac27a0ecSDave Kleikamp break; 1492ac27a0ecSDave Kleikamp case Opt_err_ro: 1493fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1494fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1495fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 1496ac27a0ecSDave Kleikamp break; 1497ac27a0ecSDave Kleikamp case Opt_err_cont: 1498fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1499fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1500fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 1501ac27a0ecSDave Kleikamp break; 1502ac27a0ecSDave Kleikamp case Opt_nouid32: 1503fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 1504ac27a0ecSDave Kleikamp break; 1505ac27a0ecSDave Kleikamp case Opt_debug: 1506fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 1507ac27a0ecSDave Kleikamp break; 1508ac27a0ecSDave Kleikamp case Opt_oldalloc: 1509fd8c37ecSTheodore Ts'o set_opt(sb, OLDALLOC); 1510ac27a0ecSDave Kleikamp break; 1511ac27a0ecSDave Kleikamp case Opt_orlov: 1512fd8c37ecSTheodore Ts'o clear_opt(sb, OLDALLOC); 1513ac27a0ecSDave Kleikamp break; 151403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1515ac27a0ecSDave Kleikamp case Opt_user_xattr: 1516fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 1517ac27a0ecSDave Kleikamp break; 1518ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1519fd8c37ecSTheodore Ts'o clear_opt(sb, XATTR_USER); 1520ac27a0ecSDave Kleikamp break; 1521ac27a0ecSDave Kleikamp #else 1522ac27a0ecSDave Kleikamp case Opt_user_xattr: 1523ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1524b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1525ac27a0ecSDave Kleikamp break; 1526ac27a0ecSDave Kleikamp #endif 152703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1528ac27a0ecSDave Kleikamp case Opt_acl: 1529fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 1530ac27a0ecSDave Kleikamp break; 1531ac27a0ecSDave Kleikamp case Opt_noacl: 1532fd8c37ecSTheodore Ts'o clear_opt(sb, POSIX_ACL); 1533ac27a0ecSDave Kleikamp break; 1534ac27a0ecSDave Kleikamp #else 1535ac27a0ecSDave Kleikamp case Opt_acl: 1536ac27a0ecSDave Kleikamp case Opt_noacl: 1537b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1538ac27a0ecSDave Kleikamp break; 1539ac27a0ecSDave Kleikamp #endif 1540ac27a0ecSDave Kleikamp case Opt_journal_update: 1541ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1542ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1543ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1544ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1545ac27a0ecSDave Kleikamp journal file. */ 1546ac27a0ecSDave Kleikamp if (is_remount) { 1547b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1548b31e1552SEric Sandeen "Cannot specify journal on remount"); 1549ac27a0ecSDave Kleikamp return 0; 1550ac27a0ecSDave Kleikamp } 1551fd8c37ecSTheodore Ts'o set_opt(sb, UPDATE_JOURNAL); 1552ac27a0ecSDave Kleikamp break; 1553ac27a0ecSDave Kleikamp case Opt_journal_dev: 1554ac27a0ecSDave Kleikamp if (is_remount) { 1555b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1556b31e1552SEric Sandeen "Cannot specify journal on remount"); 1557ac27a0ecSDave Kleikamp return 0; 1558ac27a0ecSDave Kleikamp } 1559ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1560ac27a0ecSDave Kleikamp return 0; 1561ac27a0ecSDave Kleikamp *journal_devnum = option; 1562ac27a0ecSDave Kleikamp break; 1563818d276cSGirish Shilamkar case Opt_journal_checksum: 1564fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1565d4da6c9cSLinus Torvalds break; 1566818d276cSGirish Shilamkar case Opt_journal_async_commit: 1567fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_ASYNC_COMMIT); 1568fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1569818d276cSGirish Shilamkar break; 1570ac27a0ecSDave Kleikamp case Opt_noload: 1571fd8c37ecSTheodore Ts'o set_opt(sb, NOLOAD); 1572ac27a0ecSDave Kleikamp break; 1573ac27a0ecSDave Kleikamp case Opt_commit: 1574ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1575ac27a0ecSDave Kleikamp return 0; 1576ac27a0ecSDave Kleikamp if (option < 0) 1577ac27a0ecSDave Kleikamp return 0; 1578ac27a0ecSDave Kleikamp if (option == 0) 1579cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1580ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1581ac27a0ecSDave Kleikamp break; 158230773840STheodore Ts'o case Opt_max_batch_time: 158330773840STheodore Ts'o if (match_int(&args[0], &option)) 158430773840STheodore Ts'o return 0; 158530773840STheodore Ts'o if (option < 0) 158630773840STheodore Ts'o return 0; 158730773840STheodore Ts'o if (option == 0) 158830773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 158930773840STheodore Ts'o sbi->s_max_batch_time = option; 159030773840STheodore Ts'o break; 159130773840STheodore Ts'o case Opt_min_batch_time: 159230773840STheodore Ts'o if (match_int(&args[0], &option)) 159330773840STheodore Ts'o return 0; 159430773840STheodore Ts'o if (option < 0) 159530773840STheodore Ts'o return 0; 159630773840STheodore Ts'o sbi->s_min_batch_time = option; 159730773840STheodore Ts'o break; 1598ac27a0ecSDave Kleikamp case Opt_data_journal: 1599617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1600ac27a0ecSDave Kleikamp goto datacheck; 1601ac27a0ecSDave Kleikamp case Opt_data_ordered: 1602617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1603ac27a0ecSDave Kleikamp goto datacheck; 1604ac27a0ecSDave Kleikamp case Opt_data_writeback: 1605617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1606ac27a0ecSDave Kleikamp datacheck: 1607ac27a0ecSDave Kleikamp if (is_remount) { 1608482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1609b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1610b31e1552SEric Sandeen "Cannot change data mode on remount"); 1611ac27a0ecSDave Kleikamp return 0; 1612ac27a0ecSDave Kleikamp } 1613ac27a0ecSDave Kleikamp } else { 1614fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 1615ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1616ac27a0ecSDave Kleikamp } 1617ac27a0ecSDave Kleikamp break; 16185bf5683aSHidehiro Kawai case Opt_data_err_abort: 1619fd8c37ecSTheodore Ts'o set_opt(sb, DATA_ERR_ABORT); 16205bf5683aSHidehiro Kawai break; 16215bf5683aSHidehiro Kawai case Opt_data_err_ignore: 1622fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_ERR_ABORT); 16235bf5683aSHidehiro Kawai break; 1624ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1625ac27a0ecSDave Kleikamp case Opt_usrjquota: 162656c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 162756c50f11SDmitry Monakhov return 0; 162856c50f11SDmitry Monakhov break; 1629ac27a0ecSDave Kleikamp case Opt_grpjquota: 163056c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1631ac27a0ecSDave Kleikamp return 0; 1632ac27a0ecSDave Kleikamp break; 1633ac27a0ecSDave Kleikamp case Opt_offusrjquota: 163456c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1635ac27a0ecSDave Kleikamp return 0; 1636ac27a0ecSDave Kleikamp break; 163756c50f11SDmitry Monakhov case Opt_offgrpjquota: 163856c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 163956c50f11SDmitry Monakhov return 0; 164056c50f11SDmitry Monakhov break; 164156c50f11SDmitry Monakhov 1642ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1643dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1644dfc5d03fSJan Kara goto set_qf_format; 1645ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1646dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 16475a20bdfcSJan Kara goto set_qf_format; 16485a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 16495a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1650dfc5d03fSJan Kara set_qf_format: 165117bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1652dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1653b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1654dfc5d03fSJan Kara "journaled quota options when " 1655b31e1552SEric Sandeen "quota turned on"); 1656dfc5d03fSJan Kara return 0; 1657dfc5d03fSJan Kara } 1658dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1659ac27a0ecSDave Kleikamp break; 1660ac27a0ecSDave Kleikamp case Opt_quota: 1661ac27a0ecSDave Kleikamp case Opt_usrquota: 1662fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1663fd8c37ecSTheodore Ts'o set_opt(sb, USRQUOTA); 1664ac27a0ecSDave Kleikamp break; 1665ac27a0ecSDave Kleikamp case Opt_grpquota: 1666fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1667fd8c37ecSTheodore Ts'o set_opt(sb, GRPQUOTA); 1668ac27a0ecSDave Kleikamp break; 1669ac27a0ecSDave Kleikamp case Opt_noquota: 167017bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1671b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1672b31e1552SEric Sandeen "options when quota turned on"); 1673ac27a0ecSDave Kleikamp return 0; 1674ac27a0ecSDave Kleikamp } 1675fd8c37ecSTheodore Ts'o clear_opt(sb, QUOTA); 1676fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1677fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1678ac27a0ecSDave Kleikamp break; 1679ac27a0ecSDave Kleikamp #else 1680ac27a0ecSDave Kleikamp case Opt_quota: 1681ac27a0ecSDave Kleikamp case Opt_usrquota: 1682ac27a0ecSDave Kleikamp case Opt_grpquota: 1683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1684b31e1552SEric Sandeen "quota options not supported"); 1685cd59e7b9SJan Kara break; 1686ac27a0ecSDave Kleikamp case Opt_usrjquota: 1687ac27a0ecSDave Kleikamp case Opt_grpjquota: 1688ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1689ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1690ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1691ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 16925a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1694b31e1552SEric Sandeen "journaled quota options not supported"); 1695ac27a0ecSDave Kleikamp break; 1696ac27a0ecSDave Kleikamp case Opt_noquota: 1697ac27a0ecSDave Kleikamp break; 1698ac27a0ecSDave Kleikamp #endif 1699ac27a0ecSDave Kleikamp case Opt_abort: 17004ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1701ac27a0ecSDave Kleikamp break; 170206705bffSTheodore Ts'o case Opt_nobarrier: 1703fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 170406705bffSTheodore Ts'o break; 1705ac27a0ecSDave Kleikamp case Opt_barrier: 170615121c18SEric Sandeen if (args[0].from) { 170715121c18SEric Sandeen if (match_int(&args[0], &option)) 170815121c18SEric Sandeen return 0; 170915121c18SEric Sandeen } else 171015121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1711ac27a0ecSDave Kleikamp if (option) 1712fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 1713ac27a0ecSDave Kleikamp else 1714fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 1715ac27a0ecSDave Kleikamp break; 1716ac27a0ecSDave Kleikamp case Opt_ignore: 1717ac27a0ecSDave Kleikamp break; 1718ac27a0ecSDave Kleikamp case Opt_resize: 1719ac27a0ecSDave Kleikamp if (!is_remount) { 1720b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1721b31e1552SEric Sandeen "resize option only available " 1722b31e1552SEric Sandeen "for remount"); 1723ac27a0ecSDave Kleikamp return 0; 1724ac27a0ecSDave Kleikamp } 1725ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1726ac27a0ecSDave Kleikamp return 0; 1727ac27a0ecSDave Kleikamp *n_blocks_count = option; 1728ac27a0ecSDave Kleikamp break; 1729ac27a0ecSDave Kleikamp case Opt_nobh: 1730206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1731206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1732ac27a0ecSDave Kleikamp break; 1733ac27a0ecSDave Kleikamp case Opt_bh: 1734206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1735206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1736ac27a0ecSDave Kleikamp break; 173725ec56b5SJean Noel Cordenner case Opt_i_version: 1738fd8c37ecSTheodore Ts'o set_opt(sb, I_VERSION); 173925ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 174025ec56b5SJean Noel Cordenner break; 1741dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1742fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 1743dd919b98SAneesh Kumar K.V break; 17441449032bSTheodore Ts'o case Opt_mblk_io_submit: 1745fd8c37ecSTheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 17461449032bSTheodore Ts'o break; 17471449032bSTheodore Ts'o case Opt_nomblk_io_submit: 1748fd8c37ecSTheodore Ts'o clear_opt(sb, MBLK_IO_SUBMIT); 17491449032bSTheodore Ts'o break; 1750c9de560dSAlex Tomas case Opt_stripe: 1751c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1752c9de560dSAlex Tomas return 0; 1753c9de560dSAlex Tomas if (option < 0) 1754c9de560dSAlex Tomas return 0; 1755c9de560dSAlex Tomas sbi->s_stripe = option; 1756c9de560dSAlex Tomas break; 175764769240SAlex Tomas case Opt_delalloc: 1758fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 175964769240SAlex Tomas break; 17606fd058f7STheodore Ts'o case Opt_block_validity: 1761fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 17626fd058f7STheodore Ts'o break; 17636fd058f7STheodore Ts'o case Opt_noblock_validity: 1764fd8c37ecSTheodore Ts'o clear_opt(sb, BLOCK_VALIDITY); 17656fd058f7STheodore Ts'o break; 1766240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1767240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1768240799cdSTheodore Ts'o return 0; 1769240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1770240799cdSTheodore Ts'o return 0; 17715dbd571dSAlexander V. Lukyanov if (option && !is_power_of_2(option)) { 1772b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1773b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1774b31e1552SEric Sandeen " must be a power of 2"); 17753197ebdbSTheodore Ts'o return 0; 17763197ebdbSTheodore Ts'o } 1777240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1778240799cdSTheodore Ts'o break; 1779b3881f74STheodore Ts'o case Opt_journal_ioprio: 1780b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1781b3881f74STheodore Ts'o return 0; 1782b3881f74STheodore Ts'o if (option < 0 || option > 7) 1783b3881f74STheodore Ts'o break; 1784b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1785b3881f74STheodore Ts'o option); 1786b3881f74STheodore Ts'o break; 178706705bffSTheodore Ts'o case Opt_noauto_da_alloc: 1788fd8c37ecSTheodore Ts'o set_opt(sb, NO_AUTO_DA_ALLOC); 178906705bffSTheodore Ts'o break; 1790afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 179115121c18SEric Sandeen if (args[0].from) { 179215121c18SEric Sandeen if (match_int(&args[0], &option)) 179315121c18SEric Sandeen return 0; 179415121c18SEric Sandeen } else 179515121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1796afd4672dSTheodore Ts'o if (option) 1797fd8c37ecSTheodore Ts'o clear_opt(sb, NO_AUTO_DA_ALLOC); 1798afd4672dSTheodore Ts'o else 1799fd8c37ecSTheodore Ts'o set_opt(sb,NO_AUTO_DA_ALLOC); 1800afd4672dSTheodore Ts'o break; 18015328e635SEric Sandeen case Opt_discard: 1802fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 18035328e635SEric Sandeen break; 18045328e635SEric Sandeen case Opt_nodiscard: 1805fd8c37ecSTheodore Ts'o clear_opt(sb, DISCARD); 18065328e635SEric Sandeen break; 1807744692dcSJiaying Zhang case Opt_dioread_nolock: 1808fd8c37ecSTheodore Ts'o set_opt(sb, DIOREAD_NOLOCK); 1809744692dcSJiaying Zhang break; 1810744692dcSJiaying Zhang case Opt_dioread_lock: 1811fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 1812744692dcSJiaying Zhang break; 1813bfff6873SLukas Czerner case Opt_init_inode_table: 1814fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 1815bfff6873SLukas Czerner if (args[0].from) { 1816bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1817bfff6873SLukas Czerner return 0; 1818bfff6873SLukas Czerner } else 1819bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1820bfff6873SLukas Czerner if (option < 0) 1821bfff6873SLukas Czerner return 0; 1822bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1823bfff6873SLukas Czerner break; 1824bfff6873SLukas Czerner case Opt_noinit_inode_table: 1825fd8c37ecSTheodore Ts'o clear_opt(sb, INIT_INODE_TABLE); 1826bfff6873SLukas Czerner break; 1827ac27a0ecSDave Kleikamp default: 1828b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1829b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1830b31e1552SEric Sandeen "or missing value", p); 1831ac27a0ecSDave Kleikamp return 0; 1832ac27a0ecSDave Kleikamp } 1833ac27a0ecSDave Kleikamp } 1834ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1835ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1836482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1837fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1838ac27a0ecSDave Kleikamp 1839482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1840fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1841ac27a0ecSDave Kleikamp 184256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1843b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1844b31e1552SEric Sandeen "format mixing"); 1845ac27a0ecSDave Kleikamp return 0; 1846ac27a0ecSDave Kleikamp } 1847ac27a0ecSDave Kleikamp 1848ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1849b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1850b31e1552SEric Sandeen "not specified"); 1851ac27a0ecSDave Kleikamp return 0; 1852ac27a0ecSDave Kleikamp } 1853ac27a0ecSDave Kleikamp } else { 1854ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1855b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 18562c8be6b2SJan Kara "specified with no journaling " 1857b31e1552SEric Sandeen "enabled"); 1858ac27a0ecSDave Kleikamp return 0; 1859ac27a0ecSDave Kleikamp } 1860ac27a0ecSDave Kleikamp } 1861ac27a0ecSDave Kleikamp #endif 1862ac27a0ecSDave Kleikamp return 1; 1863ac27a0ecSDave Kleikamp } 1864ac27a0ecSDave Kleikamp 1865617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1866ac27a0ecSDave Kleikamp int read_only) 1867ac27a0ecSDave Kleikamp { 1868617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1869ac27a0ecSDave Kleikamp int res = 0; 1870ac27a0ecSDave Kleikamp 1871617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1872b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1873b31e1552SEric Sandeen "forcing read-only mode"); 1874ac27a0ecSDave Kleikamp res = MS_RDONLY; 1875ac27a0ecSDave Kleikamp } 1876ac27a0ecSDave Kleikamp if (read_only) 1877ac27a0ecSDave Kleikamp return res; 1878617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1879b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1880b31e1552SEric Sandeen "running e2fsck is recommended"); 1881617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1882b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1883b31e1552SEric Sandeen "warning: mounting fs with errors, " 1884b31e1552SEric Sandeen "running e2fsck is recommended"); 1885ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1886ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1887ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1888b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1889b31e1552SEric Sandeen "warning: maximal mount count reached, " 1890b31e1552SEric Sandeen "running e2fsck is recommended"); 1891ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1892ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1893ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1894b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1895b31e1552SEric Sandeen "warning: checktime reached, " 1896b31e1552SEric Sandeen "running e2fsck is recommended"); 18970390131bSFrank Mayhar if (!sbi->s_journal) 1898216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1899ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1900617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1901e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1902ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1903617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19040390131bSFrank Mayhar if (sbi->s_journal) 1905617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1906ac27a0ecSDave Kleikamp 1907e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1908ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1909a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1910a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1911ac27a0ecSDave Kleikamp sb->s_blocksize, 1912ac27a0ecSDave Kleikamp sbi->s_groups_count, 1913617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1914617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1915a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1916ac27a0ecSDave Kleikamp 1917ac27a0ecSDave Kleikamp return res; 1918ac27a0ecSDave Kleikamp } 1919ac27a0ecSDave Kleikamp 1920772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1921772cb7c8SJose R. Santos { 1922772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1923772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1924772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1925772cb7c8SJose R. Santos ext4_group_t flex_group; 1926772cb7c8SJose R. Santos int groups_per_flex = 0; 1927c5ca7c76STheodore Ts'o size_t size; 1928772cb7c8SJose R. Santos int i; 1929772cb7c8SJose R. Santos 1930503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1931503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1932503358aeSTheodore Ts'o 1933503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1934772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1935772cb7c8SJose R. Santos return 1; 1936772cb7c8SJose R. Santos } 1937772cb7c8SJose R. Santos 1938c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1939c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1940d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1941d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1942c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1943c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1944c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 194594de56abSJoe Perches sbi->s_flex_groups = vzalloc(size); 1946772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 194794de56abSJoe Perches ext4_msg(sb, KERN_ERR, 194894de56abSJoe Perches "not enough memory for %u flex groups", 194994de56abSJoe Perches flex_group_count); 1950772cb7c8SJose R. Santos goto failed; 1951772cb7c8SJose R. Santos } 195294de56abSJoe Perches } 1953772cb7c8SJose R. Santos 1954772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 195588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1956772cb7c8SJose R. Santos 1957772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19587ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19597ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 19607ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 19617ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 19627ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19637ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1964772cb7c8SJose R. Santos } 1965772cb7c8SJose R. Santos 1966772cb7c8SJose R. Santos return 1; 1967772cb7c8SJose R. Santos failed: 1968772cb7c8SJose R. Santos return 0; 1969772cb7c8SJose R. Santos } 1970772cb7c8SJose R. Santos 1971717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1972717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1973717d50e4SAndreas Dilger { 1974717d50e4SAndreas Dilger __u16 crc = 0; 1975717d50e4SAndreas Dilger 1976717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1977717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1978717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1979717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1980717d50e4SAndreas Dilger 1981717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1982717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1983717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1984717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1985717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1986717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1987717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1988717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1989717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1990717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1991717d50e4SAndreas Dilger offset); 1992717d50e4SAndreas Dilger } 1993717d50e4SAndreas Dilger 1994717d50e4SAndreas Dilger return cpu_to_le16(crc); 1995717d50e4SAndreas Dilger } 1996717d50e4SAndreas Dilger 1997717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1998717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1999717d50e4SAndreas Dilger { 2000717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 2001717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 2002717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 2003717d50e4SAndreas Dilger return 0; 2004717d50e4SAndreas Dilger 2005717d50e4SAndreas Dilger return 1; 2006717d50e4SAndreas Dilger } 2007717d50e4SAndreas Dilger 2008ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2009bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2010bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2011ac27a0ecSDave Kleikamp { 2012617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2013617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2014617ba13bSMingming Cao ext4_fsblk_t last_block; 2015bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2016bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2017bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2018ce421581SJose R. Santos int flexbg_flag = 0; 2019bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2020ac27a0ecSDave Kleikamp 2021ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2022ce421581SJose R. Santos flexbg_flag = 1; 2023ce421581SJose R. Santos 2024617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2025ac27a0ecSDave Kleikamp 2026197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2027197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2028197cd65aSAkinobu Mita 2029ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2030bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2031ac27a0ecSDave Kleikamp else 2032ac27a0ecSDave Kleikamp last_block = first_block + 2033617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2034ac27a0ecSDave Kleikamp 2035bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2036bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2037bfff6873SLukas Czerner grp = i; 2038bfff6873SLukas Czerner 20398fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20402b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2041b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2042a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2043b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2044ac27a0ecSDave Kleikamp return 0; 2045ac27a0ecSDave Kleikamp } 20468fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20472b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2048b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2049a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2050b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2051ac27a0ecSDave Kleikamp return 0; 2052ac27a0ecSDave Kleikamp } 20538fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2054bd81d8eeSLaurent Vivier if (inode_table < first_block || 20552b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2056b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2057a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2058b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2059ac27a0ecSDave Kleikamp return 0; 2060ac27a0ecSDave Kleikamp } 2061955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2062717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2063b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2064b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2065fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2066fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20677ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2068955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2069717d50e4SAndreas Dilger return 0; 2070717d50e4SAndreas Dilger } 20717ee1ec4cSLi Zefan } 2072955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2073ce421581SJose R. Santos if (!flexbg_flag) 2074617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2075ac27a0ecSDave Kleikamp } 2076bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2077bfff6873SLukas Czerner *first_not_zeroed = grp; 2078ac27a0ecSDave Kleikamp 2079bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 2080617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2081ac27a0ecSDave Kleikamp return 1; 2082ac27a0ecSDave Kleikamp } 2083ac27a0ecSDave Kleikamp 2084617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2085ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2086ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2087ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2088ac27a0ecSDave Kleikamp * 2089ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2090ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2091ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2092ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2093ac27a0ecSDave Kleikamp * 2094ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2095ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2096ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2097617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2098ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2099ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2100ac27a0ecSDave Kleikamp */ 2101617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2102617ba13bSMingming Cao struct ext4_super_block *es) 2103ac27a0ecSDave Kleikamp { 2104ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2105ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2106ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2107ac27a0ecSDave Kleikamp int i; 2108ac27a0ecSDave Kleikamp #endif 2109ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2110ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2111ac27a0ecSDave Kleikamp return; 2112ac27a0ecSDave Kleikamp } 2113ac27a0ecSDave Kleikamp 2114a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2115b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2116b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2117a8f48a95SEric Sandeen return; 2118a8f48a95SEric Sandeen } 2119a8f48a95SEric Sandeen 2120617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2121ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2122ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2123ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2124ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2125ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2126ac27a0ecSDave Kleikamp return; 2127ac27a0ecSDave Kleikamp } 2128ac27a0ecSDave Kleikamp 2129ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2130b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2131ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2132ac27a0ecSDave Kleikamp } 2133ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2134ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2135ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2136ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2137ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2138617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2139617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2140ac27a0ecSDave Kleikamp if (ret < 0) 2141b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2142b31e1552SEric Sandeen "Cannot turn on journaled " 2143b31e1552SEric Sandeen "quota: error %d", ret); 2144ac27a0ecSDave Kleikamp } 2145ac27a0ecSDave Kleikamp } 2146ac27a0ecSDave Kleikamp #endif 2147ac27a0ecSDave Kleikamp 2148ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2149ac27a0ecSDave Kleikamp struct inode *inode; 2150ac27a0ecSDave Kleikamp 215197bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 215297bd42b9SJosef Bacik if (IS_ERR(inode)) { 2153ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2154ac27a0ecSDave Kleikamp break; 2155ac27a0ecSDave Kleikamp } 2156ac27a0ecSDave Kleikamp 2157617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2158871a2931SChristoph Hellwig dquot_initialize(inode); 2159ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2160b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2161b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 216246e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2163e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2164ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2165617ba13bSMingming Cao ext4_truncate(inode); 2166ac27a0ecSDave Kleikamp nr_truncates++; 2167ac27a0ecSDave Kleikamp } else { 2168b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2169b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 217046e665e9SHarvey Harrison __func__, inode->i_ino); 2171ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2172ac27a0ecSDave Kleikamp inode->i_ino); 2173ac27a0ecSDave Kleikamp nr_orphans++; 2174ac27a0ecSDave Kleikamp } 2175ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2176ac27a0ecSDave Kleikamp } 2177ac27a0ecSDave Kleikamp 2178ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2179ac27a0ecSDave Kleikamp 2180ac27a0ecSDave Kleikamp if (nr_orphans) 2181b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2182b31e1552SEric Sandeen PLURAL(nr_orphans)); 2183ac27a0ecSDave Kleikamp if (nr_truncates) 2184b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2185b31e1552SEric Sandeen PLURAL(nr_truncates)); 2186ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2187ac27a0ecSDave Kleikamp /* Turn quotas off */ 2188ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2189ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2190287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2191ac27a0ecSDave Kleikamp } 2192ac27a0ecSDave Kleikamp #endif 2193ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2194ac27a0ecSDave Kleikamp } 21950b8e58a1SAndreas Dilger 2196cd2291a4SEric Sandeen /* 2197cd2291a4SEric Sandeen * Maximal extent format file size. 2198cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2199cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2200cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2201cd2291a4SEric Sandeen * so that won't be a limiting factor. 2202cd2291a4SEric Sandeen * 2203cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2204cd2291a4SEric Sandeen */ 2205f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2206cd2291a4SEric Sandeen { 2207cd2291a4SEric Sandeen loff_t res; 2208cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2209cd2291a4SEric Sandeen 2210cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2211f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2212cd2291a4SEric Sandeen /* 221390c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2214cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2215cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2216cd2291a4SEric Sandeen */ 2217cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2218cd2291a4SEric Sandeen 2219cd2291a4SEric Sandeen /* total blocks in file system block size */ 2220cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2221cd2291a4SEric Sandeen upper_limit <<= blkbits; 2222cd2291a4SEric Sandeen } 2223cd2291a4SEric Sandeen 2224cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2225cd2291a4SEric Sandeen res = 1LL << 32; 2226cd2291a4SEric Sandeen res <<= blkbits; 2227cd2291a4SEric Sandeen res -= 1; 2228cd2291a4SEric Sandeen 2229cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2230cd2291a4SEric Sandeen if (res > upper_limit) 2231cd2291a4SEric Sandeen res = upper_limit; 2232cd2291a4SEric Sandeen 2233cd2291a4SEric Sandeen return res; 2234cd2291a4SEric Sandeen } 2235ac27a0ecSDave Kleikamp 2236ac27a0ecSDave Kleikamp /* 2237cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22380fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22390fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2240ac27a0ecSDave Kleikamp */ 2241f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2242ac27a0ecSDave Kleikamp { 2243617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22440fc1b451SAneesh Kumar K.V int meta_blocks; 22450fc1b451SAneesh Kumar K.V loff_t upper_limit; 22460b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22470b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22480b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22490b8e58a1SAndreas Dilger * 22500b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22510b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22520fc1b451SAneesh Kumar K.V */ 22530fc1b451SAneesh Kumar K.V 2254f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22550fc1b451SAneesh Kumar K.V /* 225690c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22570b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22580b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 22590fc1b451SAneesh Kumar K.V */ 22600fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 22610fc1b451SAneesh Kumar K.V 22620fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 22630fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 22640fc1b451SAneesh Kumar K.V 22650fc1b451SAneesh Kumar K.V } else { 22668180a562SAneesh Kumar K.V /* 22678180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 22688180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 22698180a562SAneesh Kumar K.V * represent total number of blocks in 22708180a562SAneesh Kumar K.V * file system block size 22718180a562SAneesh Kumar K.V */ 22720fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 22730fc1b451SAneesh Kumar K.V 22740fc1b451SAneesh Kumar K.V } 22750fc1b451SAneesh Kumar K.V 22760fc1b451SAneesh Kumar K.V /* indirect blocks */ 22770fc1b451SAneesh Kumar K.V meta_blocks = 1; 22780fc1b451SAneesh Kumar K.V /* double indirect blocks */ 22790fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 22800fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 22810fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 22820fc1b451SAneesh Kumar K.V 22830fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 22840fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2285ac27a0ecSDave Kleikamp 2286ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2287ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2288ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2289ac27a0ecSDave Kleikamp res <<= bits; 2290ac27a0ecSDave Kleikamp if (res > upper_limit) 2291ac27a0ecSDave Kleikamp res = upper_limit; 22920fc1b451SAneesh Kumar K.V 22930fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 22940fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 22950fc1b451SAneesh Kumar K.V 2296ac27a0ecSDave Kleikamp return res; 2297ac27a0ecSDave Kleikamp } 2298ac27a0ecSDave Kleikamp 2299617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 230070bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2301ac27a0ecSDave Kleikamp { 2302617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2303fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2304ac27a0ecSDave Kleikamp int has_super = 0; 2305ac27a0ecSDave Kleikamp 2306ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2307ac27a0ecSDave Kleikamp 2308617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2309ac27a0ecSDave Kleikamp nr < first_meta_bg) 231070bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2311ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2312617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2313ac27a0ecSDave Kleikamp has_super = 1; 23140b8e58a1SAndreas Dilger 2315617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2316ac27a0ecSDave Kleikamp } 2317ac27a0ecSDave Kleikamp 2318c9de560dSAlex Tomas /** 2319c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2320c9de560dSAlex Tomas * @sbi: In memory super block info 2321c9de560dSAlex Tomas * 2322c9de560dSAlex Tomas * If we have specified it via mount option, then 2323c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2324c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2325c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2326c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2327c9de560dSAlex Tomas * 2328c9de560dSAlex Tomas */ 2329c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2330c9de560dSAlex Tomas { 2331c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2332c9de560dSAlex Tomas unsigned long stripe_width = 2333c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2334c9de560dSAlex Tomas 2335c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2336c9de560dSAlex Tomas return sbi->s_stripe; 2337c9de560dSAlex Tomas 2338c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2339c9de560dSAlex Tomas return stripe_width; 2340c9de560dSAlex Tomas 2341c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2342c9de560dSAlex Tomas return stride; 2343c9de560dSAlex Tomas 2344c9de560dSAlex Tomas return 0; 2345c9de560dSAlex Tomas } 2346ac27a0ecSDave Kleikamp 23473197ebdbSTheodore Ts'o /* sysfs supprt */ 23483197ebdbSTheodore Ts'o 23493197ebdbSTheodore Ts'o struct ext4_attr { 23503197ebdbSTheodore Ts'o struct attribute attr; 23513197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23523197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23533197ebdbSTheodore Ts'o const char *, size_t); 23543197ebdbSTheodore Ts'o int offset; 23553197ebdbSTheodore Ts'o }; 23563197ebdbSTheodore Ts'o 23573197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23583197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 23593197ebdbSTheodore Ts'o { 23603197ebdbSTheodore Ts'o char *endp; 23613197ebdbSTheodore Ts'o 2362e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2363e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 23643197ebdbSTheodore Ts'o if (*endp || *value > max) 23653197ebdbSTheodore Ts'o return -EINVAL; 23663197ebdbSTheodore Ts'o 23673197ebdbSTheodore Ts'o return 0; 23683197ebdbSTheodore Ts'o } 23693197ebdbSTheodore Ts'o 23703197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 23713197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23723197ebdbSTheodore Ts'o char *buf) 23733197ebdbSTheodore Ts'o { 23743197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 23753197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 23763197ebdbSTheodore Ts'o } 23773197ebdbSTheodore Ts'o 23783197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 23793197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23803197ebdbSTheodore Ts'o { 23813197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23823197ebdbSTheodore Ts'o 2383f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2384f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23853197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 23863197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 23873197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 23883197ebdbSTheodore Ts'o } 23893197ebdbSTheodore Ts'o 23903197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 23913197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23923197ebdbSTheodore Ts'o { 23933197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23943197ebdbSTheodore Ts'o 2395f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2396f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23973197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2398a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 23993197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2400a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24013197ebdbSTheodore Ts'o } 24023197ebdbSTheodore Ts'o 24033197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24043197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24053197ebdbSTheodore Ts'o const char *buf, size_t count) 24063197ebdbSTheodore Ts'o { 24073197ebdbSTheodore Ts'o unsigned long t; 24083197ebdbSTheodore Ts'o 24093197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24103197ebdbSTheodore Ts'o return -EINVAL; 24113197ebdbSTheodore Ts'o 24125dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24133197ebdbSTheodore Ts'o return -EINVAL; 24143197ebdbSTheodore Ts'o 24153197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24163197ebdbSTheodore Ts'o return count; 24173197ebdbSTheodore Ts'o } 24183197ebdbSTheodore Ts'o 24193197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24213197ebdbSTheodore Ts'o { 24223197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24233197ebdbSTheodore Ts'o 24243197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24253197ebdbSTheodore Ts'o } 24263197ebdbSTheodore Ts'o 24273197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24283197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24293197ebdbSTheodore Ts'o const char *buf, size_t count) 24303197ebdbSTheodore Ts'o { 24313197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24323197ebdbSTheodore Ts'o unsigned long t; 24333197ebdbSTheodore Ts'o 24343197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24353197ebdbSTheodore Ts'o return -EINVAL; 24363197ebdbSTheodore Ts'o *ui = t; 24373197ebdbSTheodore Ts'o return count; 24383197ebdbSTheodore Ts'o } 24393197ebdbSTheodore Ts'o 24403197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24413197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24423197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24433197ebdbSTheodore Ts'o .show = _show, \ 24443197ebdbSTheodore Ts'o .store = _store, \ 24453197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24463197ebdbSTheodore Ts'o } 24473197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 24483197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 24493197ebdbSTheodore Ts'o 2450857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 24513197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 24523197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 24533197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 24543197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 24553197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 24563197ebdbSTheodore Ts'o 24573197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 24583197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 24593197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 24603197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 24613197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 246211013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 24633197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 24643197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 24653197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 24663197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 24673197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 24683197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 246955138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 24703197ebdbSTheodore Ts'o 24713197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 24723197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 24733197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 24743197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 24753197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 247611013911SAndreas Dilger ATTR_LIST(inode_goal), 24773197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 24783197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 24793197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 24803197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 24813197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 24823197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 248355138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 24843197ebdbSTheodore Ts'o NULL, 24853197ebdbSTheodore Ts'o }; 24863197ebdbSTheodore Ts'o 2487857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2488857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 248927ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2490857ac889SLukas Czerner 2491857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2492857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 249327ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2494857ac889SLukas Czerner NULL, 2495857ac889SLukas Czerner }; 2496857ac889SLukas Czerner 24973197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 24983197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 24993197ebdbSTheodore Ts'o { 25003197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25013197ebdbSTheodore Ts'o s_kobj); 25023197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25033197ebdbSTheodore Ts'o 25043197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25053197ebdbSTheodore Ts'o } 25063197ebdbSTheodore Ts'o 25073197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25083197ebdbSTheodore Ts'o struct attribute *attr, 25093197ebdbSTheodore Ts'o const char *buf, size_t len) 25103197ebdbSTheodore Ts'o { 25113197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25123197ebdbSTheodore Ts'o s_kobj); 25133197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25143197ebdbSTheodore Ts'o 25153197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25163197ebdbSTheodore Ts'o } 25173197ebdbSTheodore Ts'o 25183197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25193197ebdbSTheodore Ts'o { 25203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25213197ebdbSTheodore Ts'o s_kobj); 25223197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25233197ebdbSTheodore Ts'o } 25243197ebdbSTheodore Ts'o 252552cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25263197ebdbSTheodore Ts'o .show = ext4_attr_show, 25273197ebdbSTheodore Ts'o .store = ext4_attr_store, 25283197ebdbSTheodore Ts'o }; 25293197ebdbSTheodore Ts'o 25303197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 25313197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25323197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25333197ebdbSTheodore Ts'o .release = ext4_sb_release, 25343197ebdbSTheodore Ts'o }; 25353197ebdbSTheodore Ts'o 2536857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2537857ac889SLukas Czerner { 2538857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2539857ac889SLukas Czerner } 2540857ac889SLukas Czerner 2541857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2542857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2543857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2544857ac889SLukas Czerner .release = ext4_feat_release, 2545857ac889SLukas Czerner }; 2546857ac889SLukas Czerner 2547a13fb1a4SEric Sandeen /* 2548a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2549a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2550a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2551a13fb1a4SEric Sandeen * 0 if it cannot be. 2552a13fb1a4SEric Sandeen */ 2553a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2554a13fb1a4SEric Sandeen { 2555a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2556a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2557a13fb1a4SEric Sandeen "Couldn't mount because of " 2558a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2559a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2560a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2561a13fb1a4SEric Sandeen return 0; 2562a13fb1a4SEric Sandeen } 2563a13fb1a4SEric Sandeen 2564a13fb1a4SEric Sandeen if (readonly) 2565a13fb1a4SEric Sandeen return 1; 2566a13fb1a4SEric Sandeen 2567a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2568a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2569a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2570a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2571a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2572a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2573a13fb1a4SEric Sandeen return 0; 2574a13fb1a4SEric Sandeen } 2575a13fb1a4SEric Sandeen /* 2576a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2577a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2578a13fb1a4SEric Sandeen */ 2579a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2580a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2581a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2582a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2583a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2584a13fb1a4SEric Sandeen return 0; 2585a13fb1a4SEric Sandeen } 2586a13fb1a4SEric Sandeen } 2587a13fb1a4SEric Sandeen return 1; 2588a13fb1a4SEric Sandeen } 2589a13fb1a4SEric Sandeen 259066e61a9eSTheodore Ts'o /* 259166e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 259266e61a9eSTheodore Ts'o * on the file system 259366e61a9eSTheodore Ts'o */ 259466e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 259566e61a9eSTheodore Ts'o { 259666e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 259766e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 259866e61a9eSTheodore Ts'o struct ext4_super_block *es; 259966e61a9eSTheodore Ts'o 260066e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 260166e61a9eSTheodore Ts'o es = sbi->s_es; 260266e61a9eSTheodore Ts'o 260366e61a9eSTheodore Ts'o if (es->s_error_count) 260466e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 260566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 260666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 260766e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 260866e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 260966e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 261066e61a9eSTheodore Ts'o es->s_first_error_func, 261166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 261266e61a9eSTheodore Ts'o if (es->s_first_error_ino) 261366e61a9eSTheodore Ts'o printk(": inode %u", 261466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 261566e61a9eSTheodore Ts'o if (es->s_first_error_block) 261666e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 261766e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 261866e61a9eSTheodore Ts'o printk("\n"); 261966e61a9eSTheodore Ts'o } 262066e61a9eSTheodore Ts'o if (es->s_last_error_time) { 262166e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 262266e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 262366e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 262466e61a9eSTheodore Ts'o es->s_last_error_func, 262566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 262666e61a9eSTheodore Ts'o if (es->s_last_error_ino) 262766e61a9eSTheodore Ts'o printk(": inode %u", 262866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 262966e61a9eSTheodore Ts'o if (es->s_last_error_block) 263066e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 263166e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 263266e61a9eSTheodore Ts'o printk("\n"); 263366e61a9eSTheodore Ts'o } 263466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 263566e61a9eSTheodore Ts'o } 263666e61a9eSTheodore Ts'o 2637bfff6873SLukas Czerner static void ext4_lazyinode_timeout(unsigned long data) 2638bfff6873SLukas Czerner { 2639bfff6873SLukas Czerner struct task_struct *p = (struct task_struct *)data; 2640bfff6873SLukas Czerner wake_up_process(p); 2641bfff6873SLukas Czerner } 2642bfff6873SLukas Czerner 2643bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2644bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2645bfff6873SLukas Czerner { 2646bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2647bfff6873SLukas Czerner ext4_group_t group, ngroups; 2648bfff6873SLukas Czerner struct super_block *sb; 2649bfff6873SLukas Czerner unsigned long timeout = 0; 2650bfff6873SLukas Czerner int ret = 0; 2651bfff6873SLukas Czerner 2652bfff6873SLukas Czerner sb = elr->lr_super; 2653bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2654bfff6873SLukas Czerner 2655bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2656bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2657bfff6873SLukas Czerner if (!gdp) { 2658bfff6873SLukas Czerner ret = 1; 2659bfff6873SLukas Czerner break; 2660bfff6873SLukas Czerner } 2661bfff6873SLukas Czerner 2662bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2663bfff6873SLukas Czerner break; 2664bfff6873SLukas Czerner } 2665bfff6873SLukas Czerner 2666bfff6873SLukas Czerner if (group == ngroups) 2667bfff6873SLukas Czerner ret = 1; 2668bfff6873SLukas Czerner 2669bfff6873SLukas Czerner if (!ret) { 2670bfff6873SLukas Czerner timeout = jiffies; 2671bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2672bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2673bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 2674bfff6873SLukas Czerner timeout = jiffies - timeout; 2675bfff6873SLukas Czerner if (elr->lr_sbi->s_li_wait_mult) 2676bfff6873SLukas Czerner timeout *= elr->lr_sbi->s_li_wait_mult; 2677bfff6873SLukas Czerner else 2678bfff6873SLukas Czerner timeout *= 20; 2679bfff6873SLukas Czerner elr->lr_timeout = timeout; 2680bfff6873SLukas Czerner } 2681bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2682bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2683bfff6873SLukas Czerner } 2684bfff6873SLukas Czerner 2685bfff6873SLukas Czerner return ret; 2686bfff6873SLukas Czerner } 2687bfff6873SLukas Czerner 2688bfff6873SLukas Czerner /* 2689bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 2690bfff6873SLukas Czerner * request tructure. Should be called with li_list_mtx held 2691bfff6873SLukas Czerner */ 2692bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2693bfff6873SLukas Czerner { 2694bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2695bfff6873SLukas Czerner 2696bfff6873SLukas Czerner if (!elr) 2697bfff6873SLukas Czerner return; 2698bfff6873SLukas Czerner 2699bfff6873SLukas Czerner sbi = elr->lr_sbi; 2700bfff6873SLukas Czerner 2701bfff6873SLukas Czerner list_del(&elr->lr_request); 2702bfff6873SLukas Czerner sbi->s_li_request = NULL; 2703bfff6873SLukas Czerner kfree(elr); 2704bfff6873SLukas Czerner } 2705bfff6873SLukas Czerner 2706bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2707bfff6873SLukas Czerner { 2708bfff6873SLukas Czerner struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; 2709bfff6873SLukas Czerner 2710bfff6873SLukas Czerner if (!ext4_li_info) 2711bfff6873SLukas Czerner return; 2712bfff6873SLukas Czerner 2713bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2714bfff6873SLukas Czerner ext4_remove_li_request(elr); 2715bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2716bfff6873SLukas Czerner } 2717bfff6873SLukas Czerner 27188f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 27198f1f7453SEric Sandeen 2720bfff6873SLukas Czerner /* 2721bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2722bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2723bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2724bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2725bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2726bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2727bfff6873SLukas Czerner * next waking time and put itself into sleep. 2728bfff6873SLukas Czerner */ 2729bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2730bfff6873SLukas Czerner { 2731bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2732bfff6873SLukas Czerner struct list_head *pos, *n; 2733bfff6873SLukas Czerner struct ext4_li_request *elr; 2734bfff6873SLukas Czerner unsigned long next_wakeup; 2735bfff6873SLukas Czerner DEFINE_WAIT(wait); 2736bfff6873SLukas Czerner 2737bfff6873SLukas Czerner BUG_ON(NULL == eli); 2738bfff6873SLukas Czerner 2739bfff6873SLukas Czerner eli->li_timer.data = (unsigned long)current; 2740bfff6873SLukas Czerner eli->li_timer.function = ext4_lazyinode_timeout; 2741bfff6873SLukas Czerner 2742bfff6873SLukas Czerner eli->li_task = current; 2743bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2744bfff6873SLukas Czerner 2745bfff6873SLukas Czerner cont_thread: 2746bfff6873SLukas Czerner while (true) { 2747bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2748bfff6873SLukas Czerner 2749bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2750bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2751bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2752bfff6873SLukas Czerner goto exit_thread; 2753bfff6873SLukas Czerner } 2754bfff6873SLukas Czerner 2755bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2756bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2757bfff6873SLukas Czerner lr_request); 2758bfff6873SLukas Czerner 2759b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2760b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2761b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2762bfff6873SLukas Czerner ext4_remove_li_request(elr); 2763bfff6873SLukas Czerner continue; 2764bfff6873SLukas Czerner } 2765b2c78cd0STheodore Ts'o } 2766bfff6873SLukas Czerner 2767bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2768bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2769bfff6873SLukas Czerner } 2770bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2771bfff6873SLukas Czerner 2772bfff6873SLukas Czerner if (freezing(current)) 2773bfff6873SLukas Czerner refrigerator(); 2774bfff6873SLukas Czerner 2775f4245bd4SLukas Czerner if ((time_after_eq(jiffies, next_wakeup)) || 2776f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2777bfff6873SLukas Czerner cond_resched(); 2778bfff6873SLukas Czerner continue; 2779bfff6873SLukas Czerner } 2780bfff6873SLukas Czerner 2781bfff6873SLukas Czerner eli->li_timer.expires = next_wakeup; 2782bfff6873SLukas Czerner add_timer(&eli->li_timer); 2783bfff6873SLukas Czerner prepare_to_wait(&eli->li_wait_daemon, &wait, 2784bfff6873SLukas Czerner TASK_INTERRUPTIBLE); 2785bfff6873SLukas Czerner if (time_before(jiffies, next_wakeup)) 2786bfff6873SLukas Czerner schedule(); 2787bfff6873SLukas Czerner finish_wait(&eli->li_wait_daemon, &wait); 27888f1f7453SEric Sandeen if (kthread_should_stop()) { 27898f1f7453SEric Sandeen ext4_clear_request_list(); 27908f1f7453SEric Sandeen goto exit_thread; 27918f1f7453SEric Sandeen } 2792bfff6873SLukas Czerner } 2793bfff6873SLukas Czerner 2794bfff6873SLukas Czerner exit_thread: 2795bfff6873SLukas Czerner /* 2796bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2797bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2798bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2799bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2800bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2801bfff6873SLukas Czerner * new one. 2802bfff6873SLukas Czerner */ 2803bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2804bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2805bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2806bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2807bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2808bfff6873SLukas Czerner goto cont_thread; 2809bfff6873SLukas Czerner } 2810bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2811bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2812bfff6873SLukas Czerner eli->li_task = NULL; 2813bfff6873SLukas Czerner wake_up(&eli->li_wait_task); 2814bfff6873SLukas Czerner 2815bfff6873SLukas Czerner kfree(ext4_li_info); 28168f1f7453SEric Sandeen ext4_lazyinit_task = NULL; 2817bfff6873SLukas Czerner ext4_li_info = NULL; 2818bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2819bfff6873SLukas Czerner 2820bfff6873SLukas Czerner return 0; 2821bfff6873SLukas Czerner } 2822bfff6873SLukas Czerner 2823bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2824bfff6873SLukas Czerner { 2825bfff6873SLukas Czerner struct list_head *pos, *n; 2826bfff6873SLukas Czerner struct ext4_li_request *elr; 2827bfff6873SLukas Czerner 2828bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2829bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2830bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2831bfff6873SLukas Czerner lr_request); 2832bfff6873SLukas Czerner ext4_remove_li_request(elr); 2833bfff6873SLukas Czerner } 2834bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2835bfff6873SLukas Czerner } 2836bfff6873SLukas Czerner 2837bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2838bfff6873SLukas Czerner { 28398f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 28408f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 28418f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 28428f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2843bfff6873SLukas Czerner ext4_clear_request_list(); 2844bfff6873SLukas Czerner del_timer_sync(&ext4_li_info->li_timer); 2845bfff6873SLukas Czerner kfree(ext4_li_info); 2846bfff6873SLukas Czerner ext4_li_info = NULL; 2847bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2848bfff6873SLukas Czerner "initialization thread\n", 2849bfff6873SLukas Czerner err); 2850bfff6873SLukas Czerner return err; 2851bfff6873SLukas Czerner } 2852bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2853bfff6873SLukas Czerner 2854bfff6873SLukas Czerner wait_event(ext4_li_info->li_wait_task, ext4_li_info->li_task != NULL); 2855bfff6873SLukas Czerner return 0; 2856bfff6873SLukas Czerner } 2857bfff6873SLukas Czerner 2858bfff6873SLukas Czerner /* 2859bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2860bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2861bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2862bfff6873SLukas Czerner * groups and return total number of groups. 2863bfff6873SLukas Czerner */ 2864bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2865bfff6873SLukas Czerner { 2866bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2867bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2868bfff6873SLukas Czerner 2869bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2870bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2871bfff6873SLukas Czerner if (!gdp) 2872bfff6873SLukas Czerner continue; 2873bfff6873SLukas Czerner 2874bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2875bfff6873SLukas Czerner break; 2876bfff6873SLukas Czerner } 2877bfff6873SLukas Czerner 2878bfff6873SLukas Czerner return group; 2879bfff6873SLukas Czerner } 2880bfff6873SLukas Czerner 2881bfff6873SLukas Czerner static int ext4_li_info_new(void) 2882bfff6873SLukas Czerner { 2883bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2884bfff6873SLukas Czerner 2885bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2886bfff6873SLukas Czerner if (!eli) 2887bfff6873SLukas Czerner return -ENOMEM; 2888bfff6873SLukas Czerner 2889bfff6873SLukas Czerner eli->li_task = NULL; 2890bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2891bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2892bfff6873SLukas Czerner 2893bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_daemon); 2894bfff6873SLukas Czerner init_waitqueue_head(&eli->li_wait_task); 2895bfff6873SLukas Czerner init_timer(&eli->li_timer); 2896bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2897bfff6873SLukas Czerner 2898bfff6873SLukas Czerner ext4_li_info = eli; 2899bfff6873SLukas Czerner 2900bfff6873SLukas Czerner return 0; 2901bfff6873SLukas Czerner } 2902bfff6873SLukas Czerner 2903bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2904bfff6873SLukas Czerner ext4_group_t start) 2905bfff6873SLukas Czerner { 2906bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2907bfff6873SLukas Czerner struct ext4_li_request *elr; 2908bfff6873SLukas Czerner unsigned long rnd; 2909bfff6873SLukas Czerner 2910bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2911bfff6873SLukas Czerner if (!elr) 2912bfff6873SLukas Czerner return NULL; 2913bfff6873SLukas Czerner 2914bfff6873SLukas Czerner elr->lr_super = sb; 2915bfff6873SLukas Czerner elr->lr_sbi = sbi; 2916bfff6873SLukas Czerner elr->lr_next_group = start; 2917bfff6873SLukas Czerner 2918bfff6873SLukas Czerner /* 2919bfff6873SLukas Czerner * Randomize first schedule time of the request to 2920bfff6873SLukas Czerner * spread the inode table initialization requests 2921bfff6873SLukas Czerner * better. 2922bfff6873SLukas Czerner */ 2923bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2924bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2925bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2926bfff6873SLukas Czerner 2927bfff6873SLukas Czerner return elr; 2928bfff6873SLukas Czerner } 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2931bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2932bfff6873SLukas Czerner { 2933bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2934bfff6873SLukas Czerner struct ext4_li_request *elr; 2935bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 29366c5a6cb9SAndrew Morton int ret = 0; 2937bfff6873SLukas Czerner 2938bfff6873SLukas Czerner if (sbi->s_li_request != NULL) 2939beed5ecbSNicolas Kaiser return 0; 2940bfff6873SLukas Czerner 2941bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2942bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 2943bfff6873SLukas Czerner !test_opt(sb, INIT_INODE_TABLE)) { 2944bfff6873SLukas Czerner sbi->s_li_request = NULL; 2945beed5ecbSNicolas Kaiser return 0; 2946bfff6873SLukas Czerner } 2947bfff6873SLukas Czerner 2948bfff6873SLukas Czerner if (first_not_zeroed == ngroups) { 2949bfff6873SLukas Czerner sbi->s_li_request = NULL; 2950beed5ecbSNicolas Kaiser return 0; 2951bfff6873SLukas Czerner } 2952bfff6873SLukas Czerner 2953bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2954beed5ecbSNicolas Kaiser if (!elr) 2955beed5ecbSNicolas Kaiser return -ENOMEM; 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2958bfff6873SLukas Czerner 2959bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2960bfff6873SLukas Czerner ret = ext4_li_info_new(); 2961bfff6873SLukas Czerner if (ret) 2962bfff6873SLukas Czerner goto out; 2963bfff6873SLukas Czerner } 2964bfff6873SLukas Czerner 2965bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2966bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2967bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2968bfff6873SLukas Czerner 2969bfff6873SLukas Czerner sbi->s_li_request = elr; 2970bfff6873SLukas Czerner 2971bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2972bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2973bfff6873SLukas Czerner if (ret) 2974bfff6873SLukas Czerner goto out; 2975bfff6873SLukas Czerner } 2976bfff6873SLukas Czerner out: 2977bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2978beed5ecbSNicolas Kaiser if (ret) 2979bfff6873SLukas Czerner kfree(elr); 2980bfff6873SLukas Czerner return ret; 2981bfff6873SLukas Czerner } 2982bfff6873SLukas Czerner 2983bfff6873SLukas Czerner /* 2984bfff6873SLukas Czerner * We do not need to lock anything since this is called on 2985bfff6873SLukas Czerner * module unload. 2986bfff6873SLukas Czerner */ 2987bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 2988bfff6873SLukas Czerner { 2989bfff6873SLukas Czerner /* 2990bfff6873SLukas Czerner * If thread exited earlier 2991bfff6873SLukas Czerner * there's nothing to be done. 2992bfff6873SLukas Czerner */ 29938f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 2994bfff6873SLukas Czerner return; 2995bfff6873SLukas Czerner 29968f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 2997bfff6873SLukas Czerner } 2998bfff6873SLukas Czerner 2999617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 30007477827fSAneesh Kumar K.V __releases(kernel_lock) 30017477827fSAneesh Kumar K.V __acquires(kernel_lock) 3002ac27a0ecSDave Kleikamp { 3003d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3004ac27a0ecSDave Kleikamp struct buffer_head *bh; 3005617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3006617ba13bSMingming Cao struct ext4_sb_info *sbi; 3007617ba13bSMingming Cao ext4_fsblk_t block; 3008617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 300970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3010ac27a0ecSDave Kleikamp unsigned long offset = 0; 3011ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3012ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3013ac27a0ecSDave Kleikamp struct inode *root; 30149f6200bbSTheodore Ts'o char *cp; 30150390131bSFrank Mayhar const char *descr; 3016dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3017ac27a0ecSDave Kleikamp int blocksize; 30184ec11028STheodore Ts'o unsigned int db_count; 30194ec11028STheodore Ts'o unsigned int i; 3020f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 3021bd81d8eeSLaurent Vivier __u64 blocks_count; 3022833f4077SPeter Zijlstra int err; 3023b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3024bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3025ac27a0ecSDave Kleikamp 3026ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3027ac27a0ecSDave Kleikamp if (!sbi) 3028dcc7dae3SCyrill Gorcunov goto out_free_orig; 3029705895b6SPekka Enberg 3030705895b6SPekka Enberg sbi->s_blockgroup_lock = 3031705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3032705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3033705895b6SPekka Enberg kfree(sbi); 3034dcc7dae3SCyrill Gorcunov goto out_free_orig; 3035705895b6SPekka Enberg } 3036ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3037ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3038617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3039617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3040240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3041d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3042f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3043f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3044f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3045ac27a0ecSDave Kleikamp 30469f6200bbSTheodore Ts'o /* Cleanup superblock name */ 30479f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 30489f6200bbSTheodore Ts'o *cp = '!'; 30499f6200bbSTheodore Ts'o 3050dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3051617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3052ac27a0ecSDave Kleikamp if (!blocksize) { 3053b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3054ac27a0ecSDave Kleikamp goto out_fail; 3055ac27a0ecSDave Kleikamp } 3056ac27a0ecSDave Kleikamp 3057ac27a0ecSDave Kleikamp /* 3058617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3059ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3060ac27a0ecSDave Kleikamp */ 3061617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 306270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 306370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3064ac27a0ecSDave Kleikamp } else { 306570bbb3e0SAndrew Morton logical_sb_block = sb_block; 3066ac27a0ecSDave Kleikamp } 3067ac27a0ecSDave Kleikamp 306870bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3069b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3070ac27a0ecSDave Kleikamp goto out_fail; 3071ac27a0ecSDave Kleikamp } 3072ac27a0ecSDave Kleikamp /* 3073ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3074617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3075ac27a0ecSDave Kleikamp */ 3076617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3077ac27a0ecSDave Kleikamp sbi->s_es = es; 3078ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3079617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3080617ba13bSMingming Cao goto cantfind_ext4; 3081afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3082ac27a0ecSDave Kleikamp 3083ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3084ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3085fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3086617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3087fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 3088437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3089437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3090437ca0fdSDmitry Monakhov "2.6.38"); 3091fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3092437ca0fdSDmitry Monakhov } 3093617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3094fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3095ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 309603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3097fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 30982e7842b8SHugh Dickins #endif 309903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3100fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 31012e7842b8SHugh Dickins #endif 31026fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3103617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3104fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3105617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3106fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3107617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3108fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3109ac27a0ecSDave Kleikamp 3110617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3111fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3112bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3113fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3114bb4f397aSAneesh Kumar K.V else 3115fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 31168b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3117fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 31188b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3119fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3120ac27a0ecSDave Kleikamp 3121ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3122ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 312330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 312430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 312530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3126ac27a0ecSDave Kleikamp 31278b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3128fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3129ac27a0ecSDave Kleikamp 31301e2462f9SMingming Cao /* 3131dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3132dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3133dd919b98SAneesh Kumar K.V */ 31348b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 31358b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3136fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3137dd919b98SAneesh Kumar K.V 31388b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 31398b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 31408b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 31418b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 31428b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 31438b67f04aSTheodore Ts'o } 3144b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3145b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3146ac27a0ecSDave Kleikamp goto failed_mount; 3147ac27a0ecSDave Kleikamp 3148ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3149482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3150ac27a0ecSDave Kleikamp 3151617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3152617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3153617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3154617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3155b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3156b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3157b31e1552SEric Sandeen "running e2fsck is recommended"); 3158469108ffSTheodore Tso 3159469108ffSTheodore Tso /* 3160ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3161ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3162ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3163ac27a0ecSDave Kleikamp */ 3164a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3165ac27a0ecSDave Kleikamp goto failed_mount; 3166a13fb1a4SEric Sandeen 3167ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3168ac27a0ecSDave Kleikamp 3169617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3170617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3171b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3172b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3173ac27a0ecSDave Kleikamp goto failed_mount; 3174ac27a0ecSDave Kleikamp } 3175ac27a0ecSDave Kleikamp 3176ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3177ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3178ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3179b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3180ce40733cSAneesh Kumar K.V blocksize); 3181ac27a0ecSDave Kleikamp goto failed_mount; 3182ac27a0ecSDave Kleikamp } 3183ac27a0ecSDave Kleikamp 3184ac27a0ecSDave Kleikamp brelse(bh); 318570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 318670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 318770bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3188ac27a0ecSDave Kleikamp if (!bh) { 3189b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3190b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3191ac27a0ecSDave Kleikamp goto failed_mount; 3192ac27a0ecSDave Kleikamp } 3193617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3194ac27a0ecSDave Kleikamp sbi->s_es = es; 3195617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3196b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3197b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3198ac27a0ecSDave Kleikamp goto failed_mount; 3199ac27a0ecSDave Kleikamp } 3200ac27a0ecSDave Kleikamp } 3201ac27a0ecSDave Kleikamp 3202a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3203a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3204f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3205f287a1a5STheodore Ts'o has_huge_files); 3206f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3207ac27a0ecSDave Kleikamp 3208617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3209617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3210617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3211ac27a0ecSDave Kleikamp } else { 3212ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3213ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3214617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 32151330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3216ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3217b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3218b31e1552SEric Sandeen "unsupported inode size: %d", 3219ac27a0ecSDave Kleikamp sbi->s_inode_size); 3220ac27a0ecSDave Kleikamp goto failed_mount; 3221ac27a0ecSDave Kleikamp } 3222ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3223ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3224ac27a0ecSDave Kleikamp } 32250b8e58a1SAndreas Dilger 32260d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 32270d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 32288fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 32290d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3230d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3231b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3232b31e1552SEric Sandeen "unsupported descriptor size %lu", 32330d1ee42fSAlexandre Ratchov sbi->s_desc_size); 32340d1ee42fSAlexandre Ratchov goto failed_mount; 32350d1ee42fSAlexandre Ratchov } 32360d1ee42fSAlexandre Ratchov } else 32370d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 32380b8e58a1SAndreas Dilger 3239ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3240ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3241b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3242617ba13bSMingming Cao goto cantfind_ext4; 32430b8e58a1SAndreas Dilger 3244617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3245ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3246617ba13bSMingming Cao goto cantfind_ext4; 3247ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3248ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 32490d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3250ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3251ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3252e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3253e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 32540b8e58a1SAndreas Dilger 3255ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3256ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3257ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3258f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3259f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3260f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3261f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3262f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3263f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3264f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3265f99b2589STheodore Ts'o #else 3266f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3267f99b2589STheodore Ts'o #endif 3268f99b2589STheodore Ts'o sb->s_dirt = 1; 3269f99b2589STheodore Ts'o } 3270ac27a0ecSDave Kleikamp 3271ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3272b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3273b31e1552SEric Sandeen "#blocks per group too big: %lu", 3274ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3275ac27a0ecSDave Kleikamp goto failed_mount; 3276ac27a0ecSDave Kleikamp } 3277ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3278b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3279b31e1552SEric Sandeen "#inodes per group too big: %lu", 3280ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3281ac27a0ecSDave Kleikamp goto failed_mount; 3282ac27a0ecSDave Kleikamp } 3283ac27a0ecSDave Kleikamp 3284bf43d84bSEric Sandeen /* 3285bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3286bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3287bf43d84bSEric Sandeen */ 32885a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 328930ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 32905a9ae68aSDarrick J. Wong if (err) { 3291b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3292bf43d84bSEric Sandeen " too large to mount safely on this system"); 3293ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 329490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 32955a9ae68aSDarrick J. Wong ret = err; 3296ac27a0ecSDave Kleikamp goto failed_mount; 3297ac27a0ecSDave Kleikamp } 3298ac27a0ecSDave Kleikamp 3299617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3300617ba13bSMingming Cao goto cantfind_ext4; 3301e7c95593SEric Sandeen 33020f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 33030f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 33040f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3305b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3306b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 33070f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 33080f2ddca6SFrom: Thiemo Nagel goto failed_mount; 33090f2ddca6SFrom: Thiemo Nagel } 33100f2ddca6SFrom: Thiemo Nagel 33114ec11028STheodore Ts'o /* 33124ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 33134ec11028STheodore Ts'o * of the filesystem. 33144ec11028STheodore Ts'o */ 33154ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3316b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 3317b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3318e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 33194ec11028STheodore Ts'o ext4_blocks_count(es)); 3320e7c95593SEric Sandeen goto failed_mount; 3321e7c95593SEric Sandeen } 3322bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3323bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3324bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3325bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 33264ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3327b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 33284ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3329b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 33304ec11028STheodore Ts'o ext4_blocks_count(es), 33314ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 33324ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 33334ec11028STheodore Ts'o goto failed_mount; 33344ec11028STheodore Ts'o } 3335bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3336fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3337fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3338617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3339617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3340ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 3341ac27a0ecSDave Kleikamp GFP_KERNEL); 3342ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3343b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3344ac27a0ecSDave Kleikamp goto failed_mount; 3345ac27a0ecSDave Kleikamp } 3346ac27a0ecSDave Kleikamp 33473244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 33489f6200bbSTheodore Ts'o if (ext4_proc_root) 33499f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 33503244fcb1SAlexander Beregalov #endif 3351240799cdSTheodore Ts'o 3352705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3353ac27a0ecSDave Kleikamp 3354ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 335570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3356ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3357ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3358b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3359b31e1552SEric Sandeen "can't read group descriptor %d", i); 3360ac27a0ecSDave Kleikamp db_count = i; 3361ac27a0ecSDave Kleikamp goto failed_mount2; 3362ac27a0ecSDave Kleikamp } 3363ac27a0ecSDave Kleikamp } 3364bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3365b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3366ac27a0ecSDave Kleikamp goto failed_mount2; 3367ac27a0ecSDave Kleikamp } 3368772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3369772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3370b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3371b31e1552SEric Sandeen "unable to initialize " 3372b31e1552SEric Sandeen "flex_bg meta info!"); 3373772cb7c8SJose R. Santos goto failed_mount2; 3374772cb7c8SJose R. Santos } 3375772cb7c8SJose R. Santos 3376ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3377ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3378ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3379ac27a0ecSDave Kleikamp 3380ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeblocks_counter, 3381ce7e010aSTheodore Ts'o ext4_count_free_blocks(sb)); 3382ce7e010aSTheodore Ts'o if (!err) { 3383ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3384ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3385ce7e010aSTheodore Ts'o } 3386ce7e010aSTheodore Ts'o if (!err) { 3387ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3388ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3389ce7e010aSTheodore Ts'o } 3390ce7e010aSTheodore Ts'o if (!err) { 3391ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 3392ce7e010aSTheodore Ts'o } 3393ce7e010aSTheodore Ts'o if (err) { 3394ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3395ce7e010aSTheodore Ts'o goto failed_mount3; 3396ce7e010aSTheodore Ts'o } 3397ce7e010aSTheodore Ts'o 3398c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 339955138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3400c9de560dSAlex Tomas 3401ac27a0ecSDave Kleikamp /* 3402ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3403ac27a0ecSDave Kleikamp */ 34049ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 34059ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3406617ba13bSMingming Cao sb->s_op = &ext4_sops; 34079ca92389STheodore Ts'o else 34089ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3409617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3410617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3411ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3412617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3413617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3414ac27a0ecSDave Kleikamp #endif 3415ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 34163b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 341732ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 3418ac27a0ecSDave Kleikamp 3419ac27a0ecSDave Kleikamp sb->s_root = NULL; 3420ac27a0ecSDave Kleikamp 3421ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3422617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3423617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3424ac27a0ecSDave Kleikamp 3425ac27a0ecSDave Kleikamp /* 3426ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3427ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3428ac27a0ecSDave Kleikamp */ 3429ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3430617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3431617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3432ac27a0ecSDave Kleikamp goto failed_mount3; 34330390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 34340390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3435b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3436b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3437744692dcSJiaying Zhang goto failed_mount_wq; 3438ac27a0ecSDave Kleikamp } else { 3439fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 3440fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 34410390131bSFrank Mayhar sbi->s_journal = NULL; 34420390131bSFrank Mayhar needs_recovery = 0; 34430390131bSFrank Mayhar goto no_journal; 3444ac27a0ecSDave Kleikamp } 3445ac27a0ecSDave Kleikamp 3446eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3447eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3448eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3449b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3450744692dcSJiaying Zhang goto failed_mount_wq; 3451eb40a09cSJose R. Santos } 3452eb40a09cSJose R. Santos 3453d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3454d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3455d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3456d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3457d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3458818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3459818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3460818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3461818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3462d4da6c9cSLinus Torvalds } else { 3463d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3464d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3465d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3466d4da6c9cSLinus Torvalds } 3467818d276cSGirish Shilamkar 3468ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3469ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3470ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3471ac27a0ecSDave Kleikamp case 0: 3472ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 347363f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 347463f57933SAndrew Morton * cope, else JOURNAL_DATA 347563f57933SAndrew Morton */ 3476dab291afSMingming Cao if (jbd2_journal_check_available_features 3477dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3478fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3479ac27a0ecSDave Kleikamp else 3480fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3481ac27a0ecSDave Kleikamp break; 3482ac27a0ecSDave Kleikamp 3483617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3484617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3485dab291afSMingming Cao if (!jbd2_journal_check_available_features 3486dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3487b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3488b31e1552SEric Sandeen "requested data journaling mode"); 3489744692dcSJiaying Zhang goto failed_mount_wq; 3490ac27a0ecSDave Kleikamp } 3491ac27a0ecSDave Kleikamp default: 3492ac27a0ecSDave Kleikamp break; 3493ac27a0ecSDave Kleikamp } 3494b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3495ac27a0ecSDave Kleikamp 3496ce7e010aSTheodore Ts'o /* 3497ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3498ce7e010aSTheodore Ts'o * need to update the global counters. 3499ce7e010aSTheodore Ts'o */ 3500ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeblocks_counter, 350184061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 3502ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 350384061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3504ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 350584061e07SDmitry Monakhov ext4_count_dirs(sb)); 3506ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); 3507206f7ab4SChristoph Hellwig 3508ce7e010aSTheodore Ts'o no_journal: 35094c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 35104c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 35114c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 35124c0425ffSMingming Cao goto failed_mount_wq; 35134c0425ffSMingming Cao } 35144c0425ffSMingming Cao 3515ac27a0ecSDave Kleikamp /* 3516dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3517ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3518ac27a0ecSDave Kleikamp */ 3519ac27a0ecSDave Kleikamp 35201d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 35211d1fe1eeSDavid Howells if (IS_ERR(root)) { 3522b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 35231d1fe1eeSDavid Howells ret = PTR_ERR(root); 3524*32a9bb57SManish Katiyar root = NULL; 3525ac27a0ecSDave Kleikamp goto failed_mount4; 3526ac27a0ecSDave Kleikamp } 3527ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3528b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3529ac27a0ecSDave Kleikamp goto failed_mount4; 3530ac27a0ecSDave Kleikamp } 35311d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 35321d1fe1eeSDavid Howells if (!sb->s_root) { 3533b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 35341d1fe1eeSDavid Howells ret = -ENOMEM; 35351d1fe1eeSDavid Howells goto failed_mount4; 35361d1fe1eeSDavid Howells } 3537ac27a0ecSDave Kleikamp 3538617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3539ef7f3835SKalpak Shah 3540ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3541ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3542ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3543ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3544ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3545ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3546ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3547ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3548ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3549ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3550ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3551ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3552ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3553ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3554ef7f3835SKalpak Shah } 3555ef7f3835SKalpak Shah } 3556ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3557ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3558ef7f3835SKalpak Shah sbi->s_inode_size) { 3559ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3560ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3561b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3562b31e1552SEric Sandeen "available"); 3563ef7f3835SKalpak Shah } 3564ef7f3835SKalpak Shah 356590576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 356690576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 3567b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 3568b31e1552SEric Sandeen "requested data journaling mode"); 3569fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 357090576c0bSTheodore Ts'o } 3571744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 3572744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 3573744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3574744692dcSJiaying Zhang "option - requested data journaling mode"); 3575fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3576744692dcSJiaying Zhang } 3577744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 3578744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3579744692dcSJiaying Zhang "option - block size is too small"); 3580fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3581744692dcSJiaying Zhang } 3582744692dcSJiaying Zhang } 3583c2774d84SAneesh Kumar K.V 35846fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 35856fd058f7STheodore Ts'o if (err) { 3586b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3587fbe845ddSCurt Wohlgemuth "zone (%d)", err); 35886fd058f7STheodore Ts'o goto failed_mount4; 35896fd058f7STheodore Ts'o } 35906fd058f7STheodore Ts'o 3591c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3592c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3593c2774d84SAneesh Kumar K.V if (err) { 3594421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3595c2774d84SAneesh Kumar K.V err); 3596c2774d84SAneesh Kumar K.V goto failed_mount4; 3597c2774d84SAneesh Kumar K.V } 3598c2774d84SAneesh Kumar K.V 3599bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3600bfff6873SLukas Czerner if (err) 3601bfff6873SLukas Czerner goto failed_mount4; 3602bfff6873SLukas Czerner 36033197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 36043197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 36053197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 36063197ebdbSTheodore Ts'o "%s", sb->s_id); 36073197ebdbSTheodore Ts'o if (err) { 36083197ebdbSTheodore Ts'o ext4_mb_release(sb); 36093197ebdbSTheodore Ts'o ext4_ext_release(sb); 36103197ebdbSTheodore Ts'o goto failed_mount4; 36113197ebdbSTheodore Ts'o }; 36123197ebdbSTheodore Ts'o 3613617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3614617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3615617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 36160390131bSFrank Mayhar if (needs_recovery) { 3617b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3618617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 36190390131bSFrank Mayhar } 36200390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 36210390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 36220390131bSFrank Mayhar descr = " journalled data mode"; 36230390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 36240390131bSFrank Mayhar descr = " ordered data mode"; 36250390131bSFrank Mayhar else 36260390131bSFrank Mayhar descr = " writeback data mode"; 36270390131bSFrank Mayhar } else 36280390131bSFrank Mayhar descr = "out journal"; 36290390131bSFrank Mayhar 3630d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 36318b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 36328b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3633ac27a0ecSDave Kleikamp 363466e61a9eSTheodore Ts'o init_timer(&sbi->s_err_report); 363566e61a9eSTheodore Ts'o sbi->s_err_report.function = print_daily_error_info; 363666e61a9eSTheodore Ts'o sbi->s_err_report.data = (unsigned long) sb; 363766e61a9eSTheodore Ts'o if (es->s_error_count) 363866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3639ac27a0ecSDave Kleikamp 3640d4c402d9SCurt Wohlgemuth kfree(orig_data); 3641ac27a0ecSDave Kleikamp return 0; 3642ac27a0ecSDave Kleikamp 3643617ba13bSMingming Cao cantfind_ext4: 3644ac27a0ecSDave Kleikamp if (!silent) 3645b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3646ac27a0ecSDave Kleikamp goto failed_mount; 3647ac27a0ecSDave Kleikamp 3648ac27a0ecSDave Kleikamp failed_mount4: 3649*32a9bb57SManish Katiyar iput(root); 3650*32a9bb57SManish Katiyar sb->s_root = NULL; 3651b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 36524c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 36534c0425ffSMingming Cao failed_mount_wq: 36546fd058f7STheodore Ts'o ext4_release_system_zone(sb); 36550390131bSFrank Mayhar if (sbi->s_journal) { 3656dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 365747b4a50bSJan Kara sbi->s_journal = NULL; 36580390131bSFrank Mayhar } 3659ac27a0ecSDave Kleikamp failed_mount3: 3660c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3661c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3662c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3663c5ca7c76STheodore Ts'o else 3664c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3665c5ca7c76STheodore Ts'o } 3666ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeblocks_counter); 3667ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3668ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 3669ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3670ac27a0ecSDave Kleikamp failed_mount2: 3671ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3672ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3673ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3674ac27a0ecSDave Kleikamp failed_mount: 3675240799cdSTheodore Ts'o if (sbi->s_proc) { 36769f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3677240799cdSTheodore Ts'o } 3678ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3679ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3680ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3681ac27a0ecSDave Kleikamp #endif 3682617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3683ac27a0ecSDave Kleikamp brelse(bh); 3684ac27a0ecSDave Kleikamp out_fail: 3685ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3686f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3687ac27a0ecSDave Kleikamp kfree(sbi); 3688dcc7dae3SCyrill Gorcunov out_free_orig: 3689d4c402d9SCurt Wohlgemuth kfree(orig_data); 36901d1fe1eeSDavid Howells return ret; 3691ac27a0ecSDave Kleikamp } 3692ac27a0ecSDave Kleikamp 3693ac27a0ecSDave Kleikamp /* 3694ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3695ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3696ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3697ac27a0ecSDave Kleikamp */ 3698617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3699ac27a0ecSDave Kleikamp { 3700617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3701ac27a0ecSDave Kleikamp 3702ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 370330773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 370430773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3705ac27a0ecSDave Kleikamp 3706a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3707ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3708dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3709ac27a0ecSDave Kleikamp else 3710dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 37115bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 37125bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 37135bf5683aSHidehiro Kawai else 37145bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3715a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3716ac27a0ecSDave Kleikamp } 3717ac27a0ecSDave Kleikamp 3718617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3719ac27a0ecSDave Kleikamp unsigned int journal_inum) 3720ac27a0ecSDave Kleikamp { 3721ac27a0ecSDave Kleikamp struct inode *journal_inode; 3722ac27a0ecSDave Kleikamp journal_t *journal; 3723ac27a0ecSDave Kleikamp 37240390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37250390131bSFrank Mayhar 3726ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3727ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3728ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3729ac27a0ecSDave Kleikamp 37301d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 37311d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3732b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3733ac27a0ecSDave Kleikamp return NULL; 3734ac27a0ecSDave Kleikamp } 3735ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3736ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3737ac27a0ecSDave Kleikamp iput(journal_inode); 3738b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3739ac27a0ecSDave Kleikamp return NULL; 3740ac27a0ecSDave Kleikamp } 3741ac27a0ecSDave Kleikamp 3742e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3743ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 37441d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3745b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3746ac27a0ecSDave Kleikamp iput(journal_inode); 3747ac27a0ecSDave Kleikamp return NULL; 3748ac27a0ecSDave Kleikamp } 3749ac27a0ecSDave Kleikamp 3750dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3751ac27a0ecSDave Kleikamp if (!journal) { 3752b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3753ac27a0ecSDave Kleikamp iput(journal_inode); 3754ac27a0ecSDave Kleikamp return NULL; 3755ac27a0ecSDave Kleikamp } 3756ac27a0ecSDave Kleikamp journal->j_private = sb; 3757617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3758ac27a0ecSDave Kleikamp return journal; 3759ac27a0ecSDave Kleikamp } 3760ac27a0ecSDave Kleikamp 3761617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3762ac27a0ecSDave Kleikamp dev_t j_dev) 3763ac27a0ecSDave Kleikamp { 3764ac27a0ecSDave Kleikamp struct buffer_head *bh; 3765ac27a0ecSDave Kleikamp journal_t *journal; 3766617ba13bSMingming Cao ext4_fsblk_t start; 3767617ba13bSMingming Cao ext4_fsblk_t len; 3768ac27a0ecSDave Kleikamp int hblock, blocksize; 3769617ba13bSMingming Cao ext4_fsblk_t sb_block; 3770ac27a0ecSDave Kleikamp unsigned long offset; 3771617ba13bSMingming Cao struct ext4_super_block *es; 3772ac27a0ecSDave Kleikamp struct block_device *bdev; 3773ac27a0ecSDave Kleikamp 37740390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 37750390131bSFrank Mayhar 3776b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3777ac27a0ecSDave Kleikamp if (bdev == NULL) 3778ac27a0ecSDave Kleikamp return NULL; 3779ac27a0ecSDave Kleikamp 3780ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3781e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3782ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3783b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3784b31e1552SEric Sandeen "blocksize too small for journal device"); 3785ac27a0ecSDave Kleikamp goto out_bdev; 3786ac27a0ecSDave Kleikamp } 3787ac27a0ecSDave Kleikamp 3788617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3789617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3790ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3791ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3792b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3793b31e1552SEric Sandeen "external journal"); 3794ac27a0ecSDave Kleikamp goto out_bdev; 3795ac27a0ecSDave Kleikamp } 3796ac27a0ecSDave Kleikamp 3797617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3798617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3799ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3800617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3801b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3802b31e1552SEric Sandeen "bad superblock"); 3803ac27a0ecSDave Kleikamp brelse(bh); 3804ac27a0ecSDave Kleikamp goto out_bdev; 3805ac27a0ecSDave Kleikamp } 3806ac27a0ecSDave Kleikamp 3807617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3808b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3809ac27a0ecSDave Kleikamp brelse(bh); 3810ac27a0ecSDave Kleikamp goto out_bdev; 3811ac27a0ecSDave Kleikamp } 3812ac27a0ecSDave Kleikamp 3813bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3814ac27a0ecSDave Kleikamp start = sb_block + 1; 3815ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3816ac27a0ecSDave Kleikamp 3817dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3818ac27a0ecSDave Kleikamp start, len, blocksize); 3819ac27a0ecSDave Kleikamp if (!journal) { 3820b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3821ac27a0ecSDave Kleikamp goto out_bdev; 3822ac27a0ecSDave Kleikamp } 3823ac27a0ecSDave Kleikamp journal->j_private = sb; 3824ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3825ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3826ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3827b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3828ac27a0ecSDave Kleikamp goto out_journal; 3829ac27a0ecSDave Kleikamp } 3830ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3831b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3832b31e1552SEric Sandeen "user (unsupported) - %d", 3833ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3834ac27a0ecSDave Kleikamp goto out_journal; 3835ac27a0ecSDave Kleikamp } 3836617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3837617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3838ac27a0ecSDave Kleikamp return journal; 38390b8e58a1SAndreas Dilger 3840ac27a0ecSDave Kleikamp out_journal: 3841dab291afSMingming Cao jbd2_journal_destroy(journal); 3842ac27a0ecSDave Kleikamp out_bdev: 3843617ba13bSMingming Cao ext4_blkdev_put(bdev); 3844ac27a0ecSDave Kleikamp return NULL; 3845ac27a0ecSDave Kleikamp } 3846ac27a0ecSDave Kleikamp 3847617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3848617ba13bSMingming Cao struct ext4_super_block *es, 3849ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3850ac27a0ecSDave Kleikamp { 3851ac27a0ecSDave Kleikamp journal_t *journal; 3852ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3853ac27a0ecSDave Kleikamp dev_t journal_dev; 3854ac27a0ecSDave Kleikamp int err = 0; 3855ac27a0ecSDave Kleikamp int really_read_only; 3856ac27a0ecSDave Kleikamp 38570390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38580390131bSFrank Mayhar 3859ac27a0ecSDave Kleikamp if (journal_devnum && 3860ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3861b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3862b31e1552SEric Sandeen "numbers have changed"); 3863ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3864ac27a0ecSDave Kleikamp } else 3865ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3866ac27a0ecSDave Kleikamp 3867ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3868ac27a0ecSDave Kleikamp 3869ac27a0ecSDave Kleikamp /* 3870ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3871ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3872ac27a0ecSDave Kleikamp * can get read-write access to the device. 3873ac27a0ecSDave Kleikamp */ 3874617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3875ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3876b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3877b31e1552SEric Sandeen "required on readonly filesystem"); 3878ac27a0ecSDave Kleikamp if (really_read_only) { 3879b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3880b31e1552SEric Sandeen "unavailable, cannot proceed"); 3881ac27a0ecSDave Kleikamp return -EROFS; 3882ac27a0ecSDave Kleikamp } 3883b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3884b31e1552SEric Sandeen "be enabled during recovery"); 3885ac27a0ecSDave Kleikamp } 3886ac27a0ecSDave Kleikamp } 3887ac27a0ecSDave Kleikamp 3888ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3889b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3890b31e1552SEric Sandeen "and inode journals!"); 3891ac27a0ecSDave Kleikamp return -EINVAL; 3892ac27a0ecSDave Kleikamp } 3893ac27a0ecSDave Kleikamp 3894ac27a0ecSDave Kleikamp if (journal_inum) { 3895617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3896ac27a0ecSDave Kleikamp return -EINVAL; 3897ac27a0ecSDave Kleikamp } else { 3898617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3899ac27a0ecSDave Kleikamp return -EINVAL; 3900ac27a0ecSDave Kleikamp } 3901ac27a0ecSDave Kleikamp 390290576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3903b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 39044776004fSTheodore Ts'o 3905ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3906dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3907ac27a0ecSDave Kleikamp if (err) { 3908b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3909dab291afSMingming Cao jbd2_journal_destroy(journal); 3910ac27a0ecSDave Kleikamp return err; 3911ac27a0ecSDave Kleikamp } 3912ac27a0ecSDave Kleikamp } 3913ac27a0ecSDave Kleikamp 3914617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3915dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 39161c13d5c0STheodore Ts'o if (!err) { 39171c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 39181c13d5c0STheodore Ts'o if (save) 39191c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 39201c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 3921dab291afSMingming Cao err = jbd2_journal_load(journal); 39221c13d5c0STheodore Ts'o if (save) 39231c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 39241c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 39251c13d5c0STheodore Ts'o kfree(save); 39261c13d5c0STheodore Ts'o } 3927ac27a0ecSDave Kleikamp 3928ac27a0ecSDave Kleikamp if (err) { 3929b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3930dab291afSMingming Cao jbd2_journal_destroy(journal); 3931ac27a0ecSDave Kleikamp return err; 3932ac27a0ecSDave Kleikamp } 3933ac27a0ecSDave Kleikamp 3934617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3935617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3936ac27a0ecSDave Kleikamp 3937c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 3938ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3939ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3940ac27a0ecSDave Kleikamp 3941ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3942e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3943ac27a0ecSDave Kleikamp } 3944ac27a0ecSDave Kleikamp 3945ac27a0ecSDave Kleikamp return 0; 3946ac27a0ecSDave Kleikamp } 3947ac27a0ecSDave Kleikamp 3948e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3949ac27a0ecSDave Kleikamp { 3950e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3951617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3952c4be0c1dSTakashi Sato int error = 0; 3953ac27a0ecSDave Kleikamp 3954ac27a0ecSDave Kleikamp if (!sbh) 3955c4be0c1dSTakashi Sato return error; 3956914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3957914258bfSTheodore Ts'o /* 3958914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3959914258bfSTheodore Ts'o * superblock failed. This could happen because the 3960914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3961914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3962914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3963914258bfSTheodore Ts'o * write and hope for the best. 3964914258bfSTheodore Ts'o */ 3965b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3966b31e1552SEric Sandeen "superblock detected"); 3967914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3968914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3969914258bfSTheodore Ts'o } 397071290b36STheodore Ts'o /* 397171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 397271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 397371290b36STheodore Ts'o * write time when we are mounting the root file system 397471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 397571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 397671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 397771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 397871290b36STheodore Ts'o * to complain and force a full file system check. 397971290b36STheodore Ts'o */ 398071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3981ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3982f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3983afc32f7eSTheodore Ts'o es->s_kbytes_written = 3984afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3985afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3986afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 3987f613dfcbSTheodore Ts'o else 3988f613dfcbSTheodore Ts'o es->s_kbytes_written = 3989f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 39905d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 39915d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 39927f93cff9STheodore Ts'o es->s_free_inodes_count = 39937f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 39945d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 39957234ab2aSTheodore Ts'o sb->s_dirt = 0; 3996ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3997ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3998914258bfSTheodore Ts'o if (sync) { 3999c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4000c4be0c1dSTakashi Sato if (error) 4001c4be0c1dSTakashi Sato return error; 4002c4be0c1dSTakashi Sato 4003c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4004c4be0c1dSTakashi Sato if (error) { 4005b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4006b31e1552SEric Sandeen "superblock"); 4007914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4008914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4009914258bfSTheodore Ts'o } 4010914258bfSTheodore Ts'o } 4011c4be0c1dSTakashi Sato return error; 4012ac27a0ecSDave Kleikamp } 4013ac27a0ecSDave Kleikamp 4014ac27a0ecSDave Kleikamp /* 4015ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4016ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4017ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4018ac27a0ecSDave Kleikamp */ 4019617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4020617ba13bSMingming Cao struct ext4_super_block *es) 4021ac27a0ecSDave Kleikamp { 4022617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4023ac27a0ecSDave Kleikamp 40240390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 40250390131bSFrank Mayhar BUG_ON(journal != NULL); 40260390131bSFrank Mayhar return; 40270390131bSFrank Mayhar } 4028dab291afSMingming Cao jbd2_journal_lock_updates(journal); 40297ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 40307ffe1ea8SHidehiro Kawai goto out; 40317ffe1ea8SHidehiro Kawai 4032617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4033ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4034617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4035e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4036ac27a0ecSDave Kleikamp } 40377ffe1ea8SHidehiro Kawai 40387ffe1ea8SHidehiro Kawai out: 4039dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4040ac27a0ecSDave Kleikamp } 4041ac27a0ecSDave Kleikamp 4042ac27a0ecSDave Kleikamp /* 4043ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4044ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4045ac27a0ecSDave Kleikamp * main filesystem now. 4046ac27a0ecSDave Kleikamp */ 4047617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4048617ba13bSMingming Cao struct ext4_super_block *es) 4049ac27a0ecSDave Kleikamp { 4050ac27a0ecSDave Kleikamp journal_t *journal; 4051ac27a0ecSDave Kleikamp int j_errno; 4052ac27a0ecSDave Kleikamp const char *errstr; 4053ac27a0ecSDave Kleikamp 40540390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40550390131bSFrank Mayhar 4056617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4057ac27a0ecSDave Kleikamp 4058ac27a0ecSDave Kleikamp /* 4059ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4060617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4061ac27a0ecSDave Kleikamp */ 4062ac27a0ecSDave Kleikamp 4063dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4064ac27a0ecSDave Kleikamp if (j_errno) { 4065ac27a0ecSDave Kleikamp char nbuf[16]; 4066ac27a0ecSDave Kleikamp 4067617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 406812062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4069ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 407012062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4071ac27a0ecSDave Kleikamp 4072617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4073617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4074e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4075ac27a0ecSDave Kleikamp 4076dab291afSMingming Cao jbd2_journal_clear_err(journal); 4077ac27a0ecSDave Kleikamp } 4078ac27a0ecSDave Kleikamp } 4079ac27a0ecSDave Kleikamp 4080ac27a0ecSDave Kleikamp /* 4081ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4082ac27a0ecSDave Kleikamp * and wait on the commit. 4083ac27a0ecSDave Kleikamp */ 4084617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4085ac27a0ecSDave Kleikamp { 4086ac27a0ecSDave Kleikamp journal_t *journal; 40870390131bSFrank Mayhar int ret = 0; 4088ac27a0ecSDave Kleikamp 4089ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4090ac27a0ecSDave Kleikamp return 0; 4091ac27a0ecSDave Kleikamp 4092617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 40936b0310fbSEric Sandeen if (journal) { 4094437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4095617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 40966b0310fbSEric Sandeen } 40970390131bSFrank Mayhar 4098ac27a0ecSDave Kleikamp return ret; 4099ac27a0ecSDave Kleikamp } 4100ac27a0ecSDave Kleikamp 4101617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4102ac27a0ecSDave Kleikamp { 4103ebc1ac16SChristoph Hellwig lock_super(sb); 4104e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4105ebc1ac16SChristoph Hellwig unlock_super(sb); 41060390131bSFrank Mayhar } 4107ac27a0ecSDave Kleikamp 4108617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4109ac27a0ecSDave Kleikamp { 411014ce0cb4STheodore Ts'o int ret = 0; 41119eddacf9SJan Kara tid_t target; 41128d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4113ac27a0ecSDave Kleikamp 41149bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 41158d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 41168d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4117ac27a0ecSDave Kleikamp if (wait) 41188d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 41190390131bSFrank Mayhar } 412014ce0cb4STheodore Ts'o return ret; 4121ac27a0ecSDave Kleikamp } 4122ac27a0ecSDave Kleikamp 4123ac27a0ecSDave Kleikamp /* 4124ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4125ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4126ac27a0ecSDave Kleikamp */ 4127c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4128ac27a0ecSDave Kleikamp { 4129c4be0c1dSTakashi Sato int error = 0; 4130c4be0c1dSTakashi Sato journal_t *journal; 4131ac27a0ecSDave Kleikamp 41329ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41339ca92389STheodore Ts'o return 0; 41349ca92389STheodore Ts'o 4135c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4136ac27a0ecSDave Kleikamp 4137ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4138dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41397ffe1ea8SHidehiro Kawai 41407ffe1ea8SHidehiro Kawai /* 41419ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 41429ca92389STheodore Ts'o * the journal. 41437ffe1ea8SHidehiro Kawai */ 4144c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 41456b0310fbSEric Sandeen if (error < 0) 41466b0310fbSEric Sandeen goto out; 4147ac27a0ecSDave Kleikamp 4148ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4149617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4150e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 41516b0310fbSEric Sandeen out: 41526b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 41536b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 41546b0310fbSEric Sandeen return error; 4155ac27a0ecSDave Kleikamp } 4156ac27a0ecSDave Kleikamp 4157ac27a0ecSDave Kleikamp /* 4158ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4159ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4160ac27a0ecSDave Kleikamp */ 4161c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4162ac27a0ecSDave Kleikamp { 41639ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 41649ca92389STheodore Ts'o return 0; 41659ca92389STheodore Ts'o 4166ac27a0ecSDave Kleikamp lock_super(sb); 41679ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4168617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4169e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4170ac27a0ecSDave Kleikamp unlock_super(sb); 4171c4be0c1dSTakashi Sato return 0; 4172ac27a0ecSDave Kleikamp } 4173ac27a0ecSDave Kleikamp 4174673c6100STheodore Ts'o /* 4175673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4176673c6100STheodore Ts'o */ 4177673c6100STheodore Ts'o struct ext4_mount_options { 4178673c6100STheodore Ts'o unsigned long s_mount_opt; 4179a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4180673c6100STheodore Ts'o uid_t s_resuid; 4181673c6100STheodore Ts'o gid_t s_resgid; 4182673c6100STheodore Ts'o unsigned long s_commit_interval; 4183673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4184673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4185673c6100STheodore Ts'o int s_jquota_fmt; 4186673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4187673c6100STheodore Ts'o #endif 4188673c6100STheodore Ts'o }; 4189673c6100STheodore Ts'o 4190617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4191ac27a0ecSDave Kleikamp { 4192617ba13bSMingming Cao struct ext4_super_block *es; 4193617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4194617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4195ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4196617ba13bSMingming Cao struct ext4_mount_options old_opts; 4197c79d967dSChristoph Hellwig int enable_quota = 0; 41988a266467STheodore Ts'o ext4_group_t g; 4199b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4200ac27a0ecSDave Kleikamp int err; 4201ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4202ac27a0ecSDave Kleikamp int i; 4203ac27a0ecSDave Kleikamp #endif 4204d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4205ac27a0ecSDave Kleikamp 4206ac27a0ecSDave Kleikamp /* Store the original options */ 4207bbd6851aSAl Viro lock_super(sb); 4208ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4209ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4210a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4211ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4212ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4213ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 421430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 421530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4216ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4217ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4218ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4219ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4220ac27a0ecSDave Kleikamp #endif 4221b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4222b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4223ac27a0ecSDave Kleikamp 4224ac27a0ecSDave Kleikamp /* 4225ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4226ac27a0ecSDave Kleikamp */ 4227b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4228b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4229ac27a0ecSDave Kleikamp err = -EINVAL; 4230ac27a0ecSDave Kleikamp goto restore_opts; 4231ac27a0ecSDave Kleikamp } 4232ac27a0ecSDave Kleikamp 42334ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4234c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4235ac27a0ecSDave Kleikamp 4236ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4237482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4238ac27a0ecSDave Kleikamp 4239ac27a0ecSDave Kleikamp es = sbi->s_es; 4240ac27a0ecSDave Kleikamp 4241b3881f74STheodore Ts'o if (sbi->s_journal) { 4242617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4243b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4244b3881f74STheodore Ts'o } 4245ac27a0ecSDave Kleikamp 4246ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4247bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 42484ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4249ac27a0ecSDave Kleikamp err = -EROFS; 4250ac27a0ecSDave Kleikamp goto restore_opts; 4251ac27a0ecSDave Kleikamp } 4252ac27a0ecSDave Kleikamp 4253ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 42540f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 42550f0dd62fSChristoph Hellwig if (err < 0) 4256c79d967dSChristoph Hellwig goto restore_opts; 4257c79d967dSChristoph Hellwig 4258ac27a0ecSDave Kleikamp /* 4259ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4260ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4261ac27a0ecSDave Kleikamp */ 4262ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4263ac27a0ecSDave Kleikamp 4264ac27a0ecSDave Kleikamp /* 4265ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4266ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4267ac27a0ecSDave Kleikamp * mark the partition as valid again. 4268ac27a0ecSDave Kleikamp */ 4269617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4270617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4271ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4272ac27a0ecSDave Kleikamp 4273a63c9eb2STheodore Ts'o if (sbi->s_journal) 4274617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4275ac27a0ecSDave Kleikamp } else { 4276a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4277a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4278ac27a0ecSDave Kleikamp err = -EROFS; 4279ac27a0ecSDave Kleikamp goto restore_opts; 4280ac27a0ecSDave Kleikamp } 4281ead6596bSEric Sandeen /* 42828a266467STheodore Ts'o * Make sure the group descriptor checksums 42830b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 42848a266467STheodore Ts'o */ 42858a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 42868a266467STheodore Ts'o struct ext4_group_desc *gdp = 42878a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 42888a266467STheodore Ts'o 42898a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4290b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4291b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 42928a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 42938a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 42948a266467STheodore Ts'o err = -EINVAL; 42958a266467STheodore Ts'o goto restore_opts; 42968a266467STheodore Ts'o } 42978a266467STheodore Ts'o } 42988a266467STheodore Ts'o 42998a266467STheodore Ts'o /* 4300ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4301ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4302ead6596bSEric Sandeen * require a full umount/remount for now. 4303ead6596bSEric Sandeen */ 4304ead6596bSEric Sandeen if (es->s_last_orphan) { 4305b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4306ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4307ead6596bSEric Sandeen "orphan inode list. Please " 4308b31e1552SEric Sandeen "umount/remount instead"); 4309ead6596bSEric Sandeen err = -EINVAL; 4310ead6596bSEric Sandeen goto restore_opts; 4311ead6596bSEric Sandeen } 4312ead6596bSEric Sandeen 4313ac27a0ecSDave Kleikamp /* 4314ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4315ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4316ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4317ac27a0ecSDave Kleikamp * the partition.) 4318ac27a0ecSDave Kleikamp */ 43190390131bSFrank Mayhar if (sbi->s_journal) 4320617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4321ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4322617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4323ac27a0ecSDave Kleikamp goto restore_opts; 4324617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4325ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4326c79d967dSChristoph Hellwig enable_quota = 1; 4327ac27a0ecSDave Kleikamp } 4328ac27a0ecSDave Kleikamp } 4329bfff6873SLukas Czerner 4330bfff6873SLukas Czerner /* 4331bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4332bfff6873SLukas Czerner * current settings 4333bfff6873SLukas Czerner */ 4334bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4335bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4336bfff6873SLukas Czerner else { 4337bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4338bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4339bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4340bfff6873SLukas Czerner } 4341bfff6873SLukas Czerner 43426fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 43430390131bSFrank Mayhar if (sbi->s_journal == NULL) 4344e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 43450390131bSFrank Mayhar 4346ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4347ac27a0ecSDave Kleikamp /* Release old quota file names */ 4348ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4349ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4350ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4351ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4352ac27a0ecSDave Kleikamp #endif 4353bbd6851aSAl Viro unlock_super(sb); 4354c79d967dSChristoph Hellwig if (enable_quota) 43550f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4356d4c402d9SCurt Wohlgemuth 4357d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4358d4c402d9SCurt Wohlgemuth kfree(orig_data); 4359ac27a0ecSDave Kleikamp return 0; 43600b8e58a1SAndreas Dilger 4361ac27a0ecSDave Kleikamp restore_opts: 4362ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4363ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4364a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4365ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4366ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4367ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 436830773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 436930773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4370ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4371ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4372ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4373ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4374ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4375ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4376ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4377ac27a0ecSDave Kleikamp } 4378ac27a0ecSDave Kleikamp #endif 4379bbd6851aSAl Viro unlock_super(sb); 4380d4c402d9SCurt Wohlgemuth kfree(orig_data); 4381ac27a0ecSDave Kleikamp return err; 4382ac27a0ecSDave Kleikamp } 4383ac27a0ecSDave Kleikamp 4384617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4385ac27a0ecSDave Kleikamp { 4386ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4387617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4388617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4389960cc398SPekka Enberg u64 fsid; 4390ac27a0ecSDave Kleikamp 43915e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 43925e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 43936bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 43948df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 43955e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4396ac27a0ecSDave Kleikamp 4397ac27a0ecSDave Kleikamp /* 43985e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 43995e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 44005e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4401ac27a0ecSDave Kleikamp */ 4402ac27a0ecSDave Kleikamp 4403ac27a0ecSDave Kleikamp /* 4404ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4405ac27a0ecSDave Kleikamp * overhead 4406ac27a0ecSDave Kleikamp */ 4407ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 4408ac27a0ecSDave Kleikamp 4409ac27a0ecSDave Kleikamp /* 4410ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 4411ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 4412ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 4413ac27a0ecSDave Kleikamp */ 4414ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4415617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 4416617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 4417ac27a0ecSDave Kleikamp cond_resched(); 4418ac27a0ecSDave Kleikamp } 4419ac27a0ecSDave Kleikamp 4420ac27a0ecSDave Kleikamp /* 4421ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 4422ac27a0ecSDave Kleikamp * bitmap, and an inode table. 4423ac27a0ecSDave Kleikamp */ 44245e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 44255e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 44265e70030dSBadari Pulavarty smp_wmb(); 44276bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4428ac27a0ecSDave Kleikamp } 4429ac27a0ecSDave Kleikamp 4430617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4431ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 44325e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 44336bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 44346bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 4435bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4436bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4437ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4438ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 443952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4440617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4441960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4442960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4443960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4444960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 44450b8e58a1SAndreas Dilger 4446ac27a0ecSDave Kleikamp return 0; 4447ac27a0ecSDave Kleikamp } 4448ac27a0ecSDave Kleikamp 44490b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 44500b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4451ac27a0ecSDave Kleikamp * Process 1 Process 2 4452617ba13bSMingming Cao * ext4_create() quota_sync() 4453dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4454871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4455dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4456ac27a0ecSDave Kleikamp * 4457ac27a0ecSDave Kleikamp */ 4458ac27a0ecSDave Kleikamp 4459ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4460ac27a0ecSDave Kleikamp 4461ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4462ac27a0ecSDave Kleikamp { 4463ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4464ac27a0ecSDave Kleikamp } 4465ac27a0ecSDave Kleikamp 4466617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4467ac27a0ecSDave Kleikamp { 4468ac27a0ecSDave Kleikamp int ret, err; 4469ac27a0ecSDave Kleikamp handle_t *handle; 4470ac27a0ecSDave Kleikamp struct inode *inode; 4471ac27a0ecSDave Kleikamp 4472ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4473617ba13bSMingming Cao handle = ext4_journal_start(inode, 4474617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4475ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4476ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4477ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4478617ba13bSMingming Cao err = ext4_journal_stop(handle); 4479ac27a0ecSDave Kleikamp if (!ret) 4480ac27a0ecSDave Kleikamp ret = err; 4481ac27a0ecSDave Kleikamp return ret; 4482ac27a0ecSDave Kleikamp } 4483ac27a0ecSDave Kleikamp 4484617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4485ac27a0ecSDave Kleikamp { 4486ac27a0ecSDave Kleikamp int ret, err; 4487ac27a0ecSDave Kleikamp handle_t *handle; 4488ac27a0ecSDave Kleikamp 4489617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4490617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4491ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4492ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4493ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4494617ba13bSMingming Cao err = ext4_journal_stop(handle); 4495ac27a0ecSDave Kleikamp if (!ret) 4496ac27a0ecSDave Kleikamp ret = err; 4497ac27a0ecSDave Kleikamp return ret; 4498ac27a0ecSDave Kleikamp } 4499ac27a0ecSDave Kleikamp 4500617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4501ac27a0ecSDave Kleikamp { 4502ac27a0ecSDave Kleikamp int ret, err; 4503ac27a0ecSDave Kleikamp handle_t *handle; 4504ac27a0ecSDave Kleikamp 4505617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4506617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 45079c3013e9SJan Kara if (IS_ERR(handle)) { 45089c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 45099c3013e9SJan Kara dquot_release(dquot); 4510ac27a0ecSDave Kleikamp return PTR_ERR(handle); 45119c3013e9SJan Kara } 4512ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4513617ba13bSMingming Cao err = ext4_journal_stop(handle); 4514ac27a0ecSDave Kleikamp if (!ret) 4515ac27a0ecSDave Kleikamp ret = err; 4516ac27a0ecSDave Kleikamp return ret; 4517ac27a0ecSDave Kleikamp } 4518ac27a0ecSDave Kleikamp 4519617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4520ac27a0ecSDave Kleikamp { 45212c8be6b2SJan Kara /* Are we journaling quotas? */ 4522617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4523617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4524ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4525617ba13bSMingming Cao return ext4_write_dquot(dquot); 4526ac27a0ecSDave Kleikamp } else { 4527ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4528ac27a0ecSDave Kleikamp } 4529ac27a0ecSDave Kleikamp } 4530ac27a0ecSDave Kleikamp 4531617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4532ac27a0ecSDave Kleikamp { 4533ac27a0ecSDave Kleikamp int ret, err; 4534ac27a0ecSDave Kleikamp handle_t *handle; 4535ac27a0ecSDave Kleikamp 4536ac27a0ecSDave Kleikamp /* Data block + inode block */ 4537617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4538ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4539ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4540ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4541617ba13bSMingming Cao err = ext4_journal_stop(handle); 4542ac27a0ecSDave Kleikamp if (!ret) 4543ac27a0ecSDave Kleikamp ret = err; 4544ac27a0ecSDave Kleikamp return ret; 4545ac27a0ecSDave Kleikamp } 4546ac27a0ecSDave Kleikamp 4547ac27a0ecSDave Kleikamp /* 4548ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4549ac27a0ecSDave Kleikamp * the quota file and such... 4550ac27a0ecSDave Kleikamp */ 4551617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4552ac27a0ecSDave Kleikamp { 4553287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4554617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4555ac27a0ecSDave Kleikamp } 4556ac27a0ecSDave Kleikamp 4557ac27a0ecSDave Kleikamp /* 4558ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4559ac27a0ecSDave Kleikamp */ 4560617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4561f00c9e44SJan Kara struct path *path) 4562ac27a0ecSDave Kleikamp { 4563ac27a0ecSDave Kleikamp int err; 4564ac27a0ecSDave Kleikamp 4565ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4566ac27a0ecSDave Kleikamp return -EINVAL; 45670623543bSJan Kara 4568ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4569f00c9e44SJan Kara if (path->mnt->mnt_sb != sb) 4570ac27a0ecSDave Kleikamp return -EXDEV; 45710623543bSJan Kara /* Journaling quota? */ 45720623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 45732b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4574f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4575b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4576b31e1552SEric Sandeen "Quota file not on filesystem root. " 4577b31e1552SEric Sandeen "Journaled quota will not work"); 45780623543bSJan Kara } 45790623543bSJan Kara 45800623543bSJan Kara /* 45810623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 45820623543bSJan Kara * all updates to the file when we bypass pagecache... 45830623543bSJan Kara */ 45840390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4585f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 45860623543bSJan Kara /* 45870623543bSJan Kara * We don't need to lock updates but journal_flush() could 45880623543bSJan Kara * otherwise be livelocked... 45890623543bSJan Kara */ 45900623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 45917ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 45920623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4593f00c9e44SJan Kara if (err) 45947ffe1ea8SHidehiro Kawai return err; 45957ffe1ea8SHidehiro Kawai } 45960623543bSJan Kara 4597f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4598ac27a0ecSDave Kleikamp } 4599ac27a0ecSDave Kleikamp 4600ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4601ca0e05e4SDmitry Monakhov { 460287009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 460387009d86SDmitry Monakhov * Caller already holds s_umount sem */ 460487009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4605ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4606ca0e05e4SDmitry Monakhov 4607ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4608ca0e05e4SDmitry Monakhov } 4609ca0e05e4SDmitry Monakhov 4610ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4611ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4612ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 4613ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4614617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4615ac27a0ecSDave Kleikamp size_t len, loff_t off) 4616ac27a0ecSDave Kleikamp { 4617ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4618725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4619ac27a0ecSDave Kleikamp int err = 0; 4620ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4621ac27a0ecSDave Kleikamp int tocopy; 4622ac27a0ecSDave Kleikamp size_t toread; 4623ac27a0ecSDave Kleikamp struct buffer_head *bh; 4624ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4625ac27a0ecSDave Kleikamp 4626ac27a0ecSDave Kleikamp if (off > i_size) 4627ac27a0ecSDave Kleikamp return 0; 4628ac27a0ecSDave Kleikamp if (off+len > i_size) 4629ac27a0ecSDave Kleikamp len = i_size-off; 4630ac27a0ecSDave Kleikamp toread = len; 4631ac27a0ecSDave Kleikamp while (toread > 0) { 4632ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4633ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4634617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4635ac27a0ecSDave Kleikamp if (err) 4636ac27a0ecSDave Kleikamp return err; 4637ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4638ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4639ac27a0ecSDave Kleikamp else 4640ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4641ac27a0ecSDave Kleikamp brelse(bh); 4642ac27a0ecSDave Kleikamp offset = 0; 4643ac27a0ecSDave Kleikamp toread -= tocopy; 4644ac27a0ecSDave Kleikamp data += tocopy; 4645ac27a0ecSDave Kleikamp blk++; 4646ac27a0ecSDave Kleikamp } 4647ac27a0ecSDave Kleikamp return len; 4648ac27a0ecSDave Kleikamp } 4649ac27a0ecSDave Kleikamp 4650ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4651ac27a0ecSDave Kleikamp * enough credits) */ 4652617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4653ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4654ac27a0ecSDave Kleikamp { 4655ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4656725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4657ac27a0ecSDave Kleikamp int err = 0; 4658ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4659ac27a0ecSDave Kleikamp struct buffer_head *bh; 4660ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4661ac27a0ecSDave Kleikamp 46620390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4663b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4664b31e1552SEric Sandeen " cancelled because transaction is not started", 46659c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 46669c3013e9SJan Kara return -EIO; 46679c3013e9SJan Kara } 466867eeb568SDmitry Monakhov /* 466967eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 467067eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 467167eeb568SDmitry Monakhov */ 467267eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 467367eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 467467eeb568SDmitry Monakhov " cancelled because not block aligned", 467567eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 467667eeb568SDmitry Monakhov return -EIO; 467767eeb568SDmitry Monakhov } 467867eeb568SDmitry Monakhov 4679ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4680617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4681ac27a0ecSDave Kleikamp if (!bh) 4682ac27a0ecSDave Kleikamp goto out; 4683617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4684ac27a0ecSDave Kleikamp if (err) { 4685ac27a0ecSDave Kleikamp brelse(bh); 4686ac27a0ecSDave Kleikamp goto out; 4687ac27a0ecSDave Kleikamp } 4688ac27a0ecSDave Kleikamp lock_buffer(bh); 468967eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4690ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4691ac27a0ecSDave Kleikamp unlock_buffer(bh); 46920390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4693ac27a0ecSDave Kleikamp brelse(bh); 4694ac27a0ecSDave Kleikamp out: 469567eeb568SDmitry Monakhov if (err) { 46964d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4697ac27a0ecSDave Kleikamp return err; 46984d04e4fbSJan Kara } 469967eeb568SDmitry Monakhov if (inode->i_size < off + len) { 470067eeb568SDmitry Monakhov i_size_write(inode, off + len); 4701617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4702ac27a0ecSDave Kleikamp } 4703ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4704617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4705ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 470667eeb568SDmitry Monakhov return len; 4707ac27a0ecSDave Kleikamp } 4708ac27a0ecSDave Kleikamp 4709ac27a0ecSDave Kleikamp #endif 4710ac27a0ecSDave Kleikamp 4711152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4712152a0836SAl Viro const char *dev_name, void *data) 4713ac27a0ecSDave Kleikamp { 4714152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4715ac27a0ecSDave Kleikamp } 4716ac27a0ecSDave Kleikamp 471737f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 471824b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 471924b58424STheodore Ts'o .owner = THIS_MODULE, 472024b58424STheodore Ts'o .name = "ext2", 4721152a0836SAl Viro .mount = ext4_mount, 472224b58424STheodore Ts'o .kill_sb = kill_block_super, 472324b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 472424b58424STheodore Ts'o }; 472524b58424STheodore Ts'o 472624b58424STheodore Ts'o static inline void register_as_ext2(void) 472724b58424STheodore Ts'o { 472824b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 472924b58424STheodore Ts'o if (err) 473024b58424STheodore Ts'o printk(KERN_WARNING 473124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 473224b58424STheodore Ts'o } 473324b58424STheodore Ts'o 473424b58424STheodore Ts'o static inline void unregister_as_ext2(void) 473524b58424STheodore Ts'o { 473624b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 473724b58424STheodore Ts'o } 473851b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 473924b58424STheodore Ts'o #else 474024b58424STheodore Ts'o static inline void register_as_ext2(void) { } 474124b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 474224b58424STheodore Ts'o #endif 474324b58424STheodore Ts'o 474437f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 474524b58424STheodore Ts'o static inline void register_as_ext3(void) 474624b58424STheodore Ts'o { 474724b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 474824b58424STheodore Ts'o if (err) 474924b58424STheodore Ts'o printk(KERN_WARNING 475024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 475124b58424STheodore Ts'o } 475224b58424STheodore Ts'o 475324b58424STheodore Ts'o static inline void unregister_as_ext3(void) 475424b58424STheodore Ts'o { 475524b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 475624b58424STheodore Ts'o } 475751b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 475824b58424STheodore Ts'o #else 475924b58424STheodore Ts'o static inline void register_as_ext3(void) { } 476024b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 476124b58424STheodore Ts'o #endif 476224b58424STheodore Ts'o 476303010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4764ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 476503010a33STheodore Ts'o .name = "ext4", 4766152a0836SAl Viro .mount = ext4_mount, 4767ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4768ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4769ac27a0ecSDave Kleikamp }; 4770ac27a0ecSDave Kleikamp 47718f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 4772857ac889SLukas Czerner { 4773857ac889SLukas Czerner struct ext4_features *ef; 4774857ac889SLukas Czerner int ret = -ENOMEM; 4775857ac889SLukas Czerner 4776857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4777857ac889SLukas Czerner if (!ef) 4778857ac889SLukas Czerner goto out; 4779857ac889SLukas Czerner 4780857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4781857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4782857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4783857ac889SLukas Czerner "features"); 4784857ac889SLukas Czerner if (ret) { 4785857ac889SLukas Czerner kfree(ef); 4786857ac889SLukas Czerner goto out; 4787857ac889SLukas Czerner } 4788857ac889SLukas Czerner 4789857ac889SLukas Czerner ext4_feat = ef; 4790857ac889SLukas Czerner ret = 0; 4791857ac889SLukas Czerner out: 4792857ac889SLukas Czerner return ret; 4793857ac889SLukas Czerner } 4794857ac889SLukas Czerner 47958f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 47968f021222SLukas Czerner { 47978f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 47988f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 47998f021222SLukas Czerner kfree(ext4_feat); 48008f021222SLukas Czerner } 48018f021222SLukas Czerner 4802e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 4803e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 4804e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 4805e9e3bcecSEric Sandeen 48065dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 4807ac27a0ecSDave Kleikamp { 4808e9e3bcecSEric Sandeen int i, err; 4809c9de560dSAlex Tomas 481012e9b892SDmitry Monakhov ext4_check_flag_values(); 4811e9e3bcecSEric Sandeen 4812e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 4813e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 4814e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 4815e9e3bcecSEric Sandeen } 4816e9e3bcecSEric Sandeen 48175dabfc78STheodore Ts'o err = ext4_init_pageio(); 48186fd058f7STheodore Ts'o if (err) 48196fd058f7STheodore Ts'o return err; 48205dabfc78STheodore Ts'o err = ext4_init_system_zone(); 4821bd2d0210STheodore Ts'o if (err) 4822dd68314cSTheodore Ts'o goto out7; 48233197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 48243197ebdbSTheodore Ts'o if (!ext4_kset) 4825dd68314cSTheodore Ts'o goto out6; 48269f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4827dd68314cSTheodore Ts'o if (!ext4_proc_root) 4828dd68314cSTheodore Ts'o goto out5; 4829857ac889SLukas Czerner 4830857ac889SLukas Czerner err = ext4_init_feat_adverts(); 4831dd68314cSTheodore Ts'o if (err) 4832dd68314cSTheodore Ts'o goto out4; 4833857ac889SLukas Czerner 48345dabfc78STheodore Ts'o err = ext4_init_mballoc(); 4835ac27a0ecSDave Kleikamp if (err) 48366fd058f7STheodore Ts'o goto out3; 4837c9de560dSAlex Tomas 48385dabfc78STheodore Ts'o err = ext4_init_xattr(); 4839c9de560dSAlex Tomas if (err) 4840c9de560dSAlex Tomas goto out2; 4841ac27a0ecSDave Kleikamp err = init_inodecache(); 4842ac27a0ecSDave Kleikamp if (err) 4843ac27a0ecSDave Kleikamp goto out1; 484424b58424STheodore Ts'o register_as_ext2(); 484524b58424STheodore Ts'o register_as_ext3(); 484603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4847ac27a0ecSDave Kleikamp if (err) 4848ac27a0ecSDave Kleikamp goto out; 4849bfff6873SLukas Czerner 4850bfff6873SLukas Czerner ext4_li_info = NULL; 4851bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 4852ac27a0ecSDave Kleikamp return 0; 4853ac27a0ecSDave Kleikamp out: 485424b58424STheodore Ts'o unregister_as_ext2(); 485524b58424STheodore Ts'o unregister_as_ext3(); 4856ac27a0ecSDave Kleikamp destroy_inodecache(); 4857ac27a0ecSDave Kleikamp out1: 48585dabfc78STheodore Ts'o ext4_exit_xattr(); 4859c9de560dSAlex Tomas out2: 48605dabfc78STheodore Ts'o ext4_exit_mballoc(); 48616fd058f7STheodore Ts'o out3: 48628f021222SLukas Czerner ext4_exit_feat_adverts(); 48636fd058f7STheodore Ts'o out4: 4864dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 4865bd2d0210STheodore Ts'o out5: 4866dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 4867dd68314cSTheodore Ts'o out6: 4868dd68314cSTheodore Ts'o ext4_exit_system_zone(); 4869dd68314cSTheodore Ts'o out7: 48705dabfc78STheodore Ts'o ext4_exit_pageio(); 4871ac27a0ecSDave Kleikamp return err; 4872ac27a0ecSDave Kleikamp } 4873ac27a0ecSDave Kleikamp 48745dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 4875ac27a0ecSDave Kleikamp { 4876bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 487724b58424STheodore Ts'o unregister_as_ext2(); 487824b58424STheodore Ts'o unregister_as_ext3(); 487903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4880ac27a0ecSDave Kleikamp destroy_inodecache(); 48815dabfc78STheodore Ts'o ext4_exit_xattr(); 48825dabfc78STheodore Ts'o ext4_exit_mballoc(); 48838f021222SLukas Czerner ext4_exit_feat_adverts(); 48849f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 48853197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 48865dabfc78STheodore Ts'o ext4_exit_system_zone(); 48875dabfc78STheodore Ts'o ext4_exit_pageio(); 4888ac27a0ecSDave Kleikamp } 4889ac27a0ecSDave Kleikamp 4890ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 489183982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4892ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 48935dabfc78STheodore Ts'o module_init(ext4_init_fs) 48945dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 4895