1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 389f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 393197ebdbSTheodore Ts'o #include <linux/ctype.h> 40ede86cc4STheodore Ts'o #include <linux/marker.h> 411330593eSVignesh Babu #include <linux/log2.h> 42717d50e4SAndreas Dilger #include <linux/crc16.h> 43ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 44ac27a0ecSDave Kleikamp 453dcf5451SChristoph Hellwig #include "ext4.h" 463dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 47ac27a0ecSDave Kleikamp #include "xattr.h" 48ac27a0ecSDave Kleikamp #include "acl.h" 49ac27a0ecSDave Kleikamp 50f4033903SCurt Wohlgemuth static int default_mb_history_length = 1000; 51f4033903SCurt Wohlgemuth 52f4033903SCurt Wohlgemuth module_param_named(default_mb_history_length, default_mb_history_length, 53f4033903SCurt Wohlgemuth int, 0644); 54f4033903SCurt Wohlgemuth MODULE_PARM_DESC(default_mb_history_length, 55f4033903SCurt Wohlgemuth "Default number of entries saved for mb_history"); 56f4033903SCurt Wohlgemuth 579f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 583197ebdbSTheodore Ts'o static struct kset *ext4_kset; 599f6200bbSTheodore Ts'o 60617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 61ac27a0ecSDave Kleikamp unsigned long journal_devnum); 62e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 63617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 64617ba13bSMingming Cao struct ext4_super_block *es); 65617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 66617ba13bSMingming Cao struct ext4_super_block *es); 67617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 68617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 69ac27a0ecSDave Kleikamp char nbuf[16]); 70617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 71617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 72c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 73617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 74c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 75ac27a0ecSDave Kleikamp 76bd81d8eeSLaurent Vivier 778fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 788fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 79bd81d8eeSLaurent Vivier { 803a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 818fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 828fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 83bd81d8eeSLaurent Vivier } 84bd81d8eeSLaurent Vivier 858fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 868fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 87bd81d8eeSLaurent Vivier { 885272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 898fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 908fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 91bd81d8eeSLaurent Vivier } 92bd81d8eeSLaurent Vivier 938fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 948fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 95bd81d8eeSLaurent Vivier { 965272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 978fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 988fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 99bd81d8eeSLaurent Vivier } 100bd81d8eeSLaurent Vivier 101560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 102560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 103560671a0SAneesh Kumar K.V { 104560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 105560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 106560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 107560671a0SAneesh Kumar K.V } 108560671a0SAneesh Kumar K.V 109560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 110560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 111560671a0SAneesh Kumar K.V { 112560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 113560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 114560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 115560671a0SAneesh Kumar K.V } 116560671a0SAneesh Kumar K.V 117560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 118560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 119560671a0SAneesh Kumar K.V { 120560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 121560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 122560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 123560671a0SAneesh Kumar K.V } 124560671a0SAneesh Kumar K.V 125560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 126560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 127560671a0SAneesh Kumar K.V { 128560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 129560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 130560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 131560671a0SAneesh Kumar K.V } 132560671a0SAneesh Kumar K.V 1338fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1348fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 135bd81d8eeSLaurent Vivier { 1363a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1378fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1388fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 139bd81d8eeSLaurent Vivier } 140bd81d8eeSLaurent Vivier 1418fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1428fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 143bd81d8eeSLaurent Vivier { 1445272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1458fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1468fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 147bd81d8eeSLaurent Vivier } 148bd81d8eeSLaurent Vivier 1498fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1508fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 151bd81d8eeSLaurent Vivier { 1525272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1538fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1548fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 155bd81d8eeSLaurent Vivier } 156bd81d8eeSLaurent Vivier 157560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 158560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 159560671a0SAneesh Kumar K.V { 160560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 161560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 162560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 163560671a0SAneesh Kumar K.V } 164560671a0SAneesh Kumar K.V 165560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 166560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 167560671a0SAneesh Kumar K.V { 168560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 169560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 170560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 171560671a0SAneesh Kumar K.V } 172560671a0SAneesh Kumar K.V 173560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 174560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 175560671a0SAneesh Kumar K.V { 176560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 177560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 178560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 179560671a0SAneesh Kumar K.V } 180560671a0SAneesh Kumar K.V 181560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 182560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 183560671a0SAneesh Kumar K.V { 184560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 185560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 186560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 187560671a0SAneesh Kumar K.V } 188560671a0SAneesh Kumar K.V 189ac27a0ecSDave Kleikamp /* 190dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 191ac27a0ecSDave Kleikamp * 192ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 193ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 194ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 195ac27a0ecSDave Kleikamp * appropriate. 196ac27a0ecSDave Kleikamp */ 197617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 198ac27a0ecSDave Kleikamp { 199ac27a0ecSDave Kleikamp journal_t *journal; 200ac27a0ecSDave Kleikamp 201ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 202ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 203ac27a0ecSDave Kleikamp 204ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 205ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 206ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 207617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2080390131bSFrank Mayhar if (journal) { 209ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 2100b8e58a1SAndreas Dilger ext4_abort(sb, __func__, "Detected aborted journal"); 211ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 212ac27a0ecSDave Kleikamp } 213dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 214ac27a0ecSDave Kleikamp } 2150390131bSFrank Mayhar /* 2160390131bSFrank Mayhar * We're not journaling, return the appropriate indication. 2170390131bSFrank Mayhar */ 2180390131bSFrank Mayhar current->journal_info = EXT4_NOJOURNAL_HANDLE; 2190390131bSFrank Mayhar return current->journal_info; 2200390131bSFrank Mayhar } 221ac27a0ecSDave Kleikamp 222ac27a0ecSDave Kleikamp /* 223ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 224dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 225ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 226ac27a0ecSDave Kleikamp * appropriate. 227ac27a0ecSDave Kleikamp */ 228617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 229ac27a0ecSDave Kleikamp { 230ac27a0ecSDave Kleikamp struct super_block *sb; 231ac27a0ecSDave Kleikamp int err; 232ac27a0ecSDave Kleikamp int rc; 233ac27a0ecSDave Kleikamp 2340390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 2350390131bSFrank Mayhar /* 2360390131bSFrank Mayhar * Do this here since we don't call jbd2_journal_stop() in 2370390131bSFrank Mayhar * no-journal mode. 2380390131bSFrank Mayhar */ 2390390131bSFrank Mayhar current->journal_info = NULL; 2400390131bSFrank Mayhar return 0; 2410390131bSFrank Mayhar } 242ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 243ac27a0ecSDave Kleikamp err = handle->h_err; 244dab291afSMingming Cao rc = jbd2_journal_stop(handle); 245ac27a0ecSDave Kleikamp 246ac27a0ecSDave Kleikamp if (!err) 247ac27a0ecSDave Kleikamp err = rc; 248ac27a0ecSDave Kleikamp if (err) 249617ba13bSMingming Cao __ext4_std_error(sb, where, err); 250ac27a0ecSDave Kleikamp return err; 251ac27a0ecSDave Kleikamp } 252ac27a0ecSDave Kleikamp 253617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 254ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 255ac27a0ecSDave Kleikamp { 256ac27a0ecSDave Kleikamp char nbuf[16]; 257617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 258ac27a0ecSDave Kleikamp 2590390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2600390131bSFrank Mayhar 261ac27a0ecSDave Kleikamp if (bh) 262ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 263ac27a0ecSDave Kleikamp 264ac27a0ecSDave Kleikamp if (!handle->h_err) 265ac27a0ecSDave Kleikamp handle->h_err = err; 266ac27a0ecSDave Kleikamp 267ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 268ac27a0ecSDave Kleikamp return; 269ac27a0ecSDave Kleikamp 270ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 271ac27a0ecSDave Kleikamp caller, errstr, err_fn); 272ac27a0ecSDave Kleikamp 273dab291afSMingming Cao jbd2_journal_abort_handle(handle); 274ac27a0ecSDave Kleikamp } 275ac27a0ecSDave Kleikamp 276ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 277ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 278ac27a0ecSDave Kleikamp * 279ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 280617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 281ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 282ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 283ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 284ac27a0ecSDave Kleikamp * write out the superblock safely. 285ac27a0ecSDave Kleikamp * 286dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 287ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 288ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 289ac27a0ecSDave Kleikamp */ 290ac27a0ecSDave Kleikamp 291617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 292ac27a0ecSDave Kleikamp { 293617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 294ac27a0ecSDave Kleikamp 295617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 296617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 297ac27a0ecSDave Kleikamp 298ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 299ac27a0ecSDave Kleikamp return; 300ac27a0ecSDave Kleikamp 301ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 302617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 303ac27a0ecSDave Kleikamp 304617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 305ac27a0ecSDave Kleikamp if (journal) 306dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 307ac27a0ecSDave Kleikamp } 308ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 309b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 310ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 311ac27a0ecSDave Kleikamp } 312e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 313ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 314617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 315ac27a0ecSDave Kleikamp sb->s_id); 316ac27a0ecSDave Kleikamp } 317ac27a0ecSDave Kleikamp 318617ba13bSMingming Cao void ext4_error(struct super_block *sb, const char *function, 319ac27a0ecSDave Kleikamp const char *fmt, ...) 320ac27a0ecSDave Kleikamp { 321ac27a0ecSDave Kleikamp va_list args; 322ac27a0ecSDave Kleikamp 323ac27a0ecSDave Kleikamp va_start(args, fmt); 324617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 325ac27a0ecSDave Kleikamp vprintk(fmt, args); 326ac27a0ecSDave Kleikamp printk("\n"); 327ac27a0ecSDave Kleikamp va_end(args); 328ac27a0ecSDave Kleikamp 329617ba13bSMingming Cao ext4_handle_error(sb); 330ac27a0ecSDave Kleikamp } 331ac27a0ecSDave Kleikamp 332617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 333ac27a0ecSDave Kleikamp char nbuf[16]) 334ac27a0ecSDave Kleikamp { 335ac27a0ecSDave Kleikamp char *errstr = NULL; 336ac27a0ecSDave Kleikamp 337ac27a0ecSDave Kleikamp switch (errno) { 338ac27a0ecSDave Kleikamp case -EIO: 339ac27a0ecSDave Kleikamp errstr = "IO failure"; 340ac27a0ecSDave Kleikamp break; 341ac27a0ecSDave Kleikamp case -ENOMEM: 342ac27a0ecSDave Kleikamp errstr = "Out of memory"; 343ac27a0ecSDave Kleikamp break; 344ac27a0ecSDave Kleikamp case -EROFS: 345dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 346ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 347ac27a0ecSDave Kleikamp else 348ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 349ac27a0ecSDave Kleikamp break; 350ac27a0ecSDave Kleikamp default: 351ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 352ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 353ac27a0ecSDave Kleikamp * NULL. */ 354ac27a0ecSDave Kleikamp if (nbuf) { 355ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 356ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 357ac27a0ecSDave Kleikamp errstr = nbuf; 358ac27a0ecSDave Kleikamp } 359ac27a0ecSDave Kleikamp break; 360ac27a0ecSDave Kleikamp } 361ac27a0ecSDave Kleikamp 362ac27a0ecSDave Kleikamp return errstr; 363ac27a0ecSDave Kleikamp } 364ac27a0ecSDave Kleikamp 365617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 366ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 367ac27a0ecSDave Kleikamp 3682b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 369ac27a0ecSDave Kleikamp { 370ac27a0ecSDave Kleikamp char nbuf[16]; 371ac27a0ecSDave Kleikamp const char *errstr; 372ac27a0ecSDave Kleikamp 373ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 374ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 375ac27a0ecSDave Kleikamp * an error. */ 376ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 377ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 378ac27a0ecSDave Kleikamp return; 379ac27a0ecSDave Kleikamp 380617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 381617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 382ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 383ac27a0ecSDave Kleikamp 384617ba13bSMingming Cao ext4_handle_error(sb); 385ac27a0ecSDave Kleikamp } 386ac27a0ecSDave Kleikamp 387ac27a0ecSDave Kleikamp /* 388617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 389ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 390ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 391ac27a0ecSDave Kleikamp * 392ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 393ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 394ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 395ac27a0ecSDave Kleikamp */ 396ac27a0ecSDave Kleikamp 397617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 398ac27a0ecSDave Kleikamp const char *fmt, ...) 399ac27a0ecSDave Kleikamp { 400ac27a0ecSDave Kleikamp va_list args; 401ac27a0ecSDave Kleikamp 402ac27a0ecSDave Kleikamp va_start(args, fmt); 403617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 404ac27a0ecSDave Kleikamp vprintk(fmt, args); 405ac27a0ecSDave Kleikamp printk("\n"); 406ac27a0ecSDave Kleikamp va_end(args); 407ac27a0ecSDave Kleikamp 408ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 409617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 410ac27a0ecSDave Kleikamp 411ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 412ac27a0ecSDave Kleikamp return; 413ac27a0ecSDave Kleikamp 414b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 415617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 416ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 417617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 418ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 419dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 420ac27a0ecSDave Kleikamp } 421ac27a0ecSDave Kleikamp 422b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 423b31e1552SEric Sandeen const char *fmt, ...) 424b31e1552SEric Sandeen { 425b31e1552SEric Sandeen va_list args; 426b31e1552SEric Sandeen 427b31e1552SEric Sandeen va_start(args, fmt); 428b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 429b31e1552SEric Sandeen vprintk(fmt, args); 430b31e1552SEric Sandeen printk("\n"); 431b31e1552SEric Sandeen va_end(args); 432b31e1552SEric Sandeen } 433b31e1552SEric Sandeen 434617ba13bSMingming Cao void ext4_warning(struct super_block *sb, const char *function, 435ac27a0ecSDave Kleikamp const char *fmt, ...) 436ac27a0ecSDave Kleikamp { 437ac27a0ecSDave Kleikamp va_list args; 438ac27a0ecSDave Kleikamp 439ac27a0ecSDave Kleikamp va_start(args, fmt); 440617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 441ac27a0ecSDave Kleikamp sb->s_id, function); 442ac27a0ecSDave Kleikamp vprintk(fmt, args); 443ac27a0ecSDave Kleikamp printk("\n"); 444ac27a0ecSDave Kleikamp va_end(args); 445ac27a0ecSDave Kleikamp } 446ac27a0ecSDave Kleikamp 4475d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 4485d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 4495d1b1b3fSAneesh Kumar K.V __releases(bitlock) 4505d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 4515d1b1b3fSAneesh Kumar K.V { 4525d1b1b3fSAneesh Kumar K.V va_list args; 4535d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4545d1b1b3fSAneesh Kumar K.V 4555d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 4565d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 4575d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 4585d1b1b3fSAneesh Kumar K.V printk("\n"); 4595d1b1b3fSAneesh Kumar K.V va_end(args); 4605d1b1b3fSAneesh Kumar K.V 4615d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 4625d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4635d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 464e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 4655d1b1b3fSAneesh Kumar K.V return; 4665d1b1b3fSAneesh Kumar K.V } 4675d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 4685d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 4695d1b1b3fSAneesh Kumar K.V /* 4705d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 4715d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 4725d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 4735d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 4745d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 4755d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 4765d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 4775d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 4785d1b1b3fSAneesh Kumar K.V * more appropriate error code. 4795d1b1b3fSAneesh Kumar K.V */ 4805d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 4815d1b1b3fSAneesh Kumar K.V return; 4825d1b1b3fSAneesh Kumar K.V } 4835d1b1b3fSAneesh Kumar K.V 484617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 485ac27a0ecSDave Kleikamp { 486617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 487ac27a0ecSDave Kleikamp 488617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 489ac27a0ecSDave Kleikamp return; 490ac27a0ecSDave Kleikamp 49146e665e9SHarvey Harrison ext4_warning(sb, __func__, 492ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 493ac27a0ecSDave Kleikamp "running e2fsck is recommended", 494617ba13bSMingming Cao EXT4_DYNAMIC_REV); 495ac27a0ecSDave Kleikamp 496617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 497617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 498617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 499ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 500ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 501ac27a0ecSDave Kleikamp 502ac27a0ecSDave Kleikamp /* 503ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 504ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 505ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 506ac27a0ecSDave Kleikamp */ 507ac27a0ecSDave Kleikamp } 508ac27a0ecSDave Kleikamp 509ac27a0ecSDave Kleikamp /* 510ac27a0ecSDave Kleikamp * Open the external journal device 511ac27a0ecSDave Kleikamp */ 512b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 513ac27a0ecSDave Kleikamp { 514ac27a0ecSDave Kleikamp struct block_device *bdev; 515ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 516ac27a0ecSDave Kleikamp 517ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 518ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 519ac27a0ecSDave Kleikamp goto fail; 520ac27a0ecSDave Kleikamp return bdev; 521ac27a0ecSDave Kleikamp 522ac27a0ecSDave Kleikamp fail: 523b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 524ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 525ac27a0ecSDave Kleikamp return NULL; 526ac27a0ecSDave Kleikamp } 527ac27a0ecSDave Kleikamp 528ac27a0ecSDave Kleikamp /* 529ac27a0ecSDave Kleikamp * Release the journal device 530ac27a0ecSDave Kleikamp */ 531617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 532ac27a0ecSDave Kleikamp { 533ac27a0ecSDave Kleikamp bd_release(bdev); 5349a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 535ac27a0ecSDave Kleikamp } 536ac27a0ecSDave Kleikamp 537617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 538ac27a0ecSDave Kleikamp { 539ac27a0ecSDave Kleikamp struct block_device *bdev; 540ac27a0ecSDave Kleikamp int ret = -ENODEV; 541ac27a0ecSDave Kleikamp 542ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 543ac27a0ecSDave Kleikamp if (bdev) { 544617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 545ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 546ac27a0ecSDave Kleikamp } 547ac27a0ecSDave Kleikamp return ret; 548ac27a0ecSDave Kleikamp } 549ac27a0ecSDave Kleikamp 550ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 551ac27a0ecSDave Kleikamp { 552617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 553ac27a0ecSDave Kleikamp } 554ac27a0ecSDave Kleikamp 555617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 556ac27a0ecSDave Kleikamp { 557ac27a0ecSDave Kleikamp struct list_head *l; 558ac27a0ecSDave Kleikamp 559b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 560ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 561ac27a0ecSDave Kleikamp 562ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 563ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 564ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 565ac27a0ecSDave Kleikamp printk(KERN_ERR " " 566ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 567ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 568ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 569ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 570ac27a0ecSDave Kleikamp } 571ac27a0ecSDave Kleikamp } 572ac27a0ecSDave Kleikamp 573617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 574ac27a0ecSDave Kleikamp { 575617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 576617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 577ef2cabf7SHidehiro Kawai int i, err; 578ac27a0ecSDave Kleikamp 579a9e220f8SAl Viro lock_super(sb); 5806cfd0148SChristoph Hellwig lock_kernel(); 5818c85e125SChristoph Hellwig if (sb->s_dirt) 582ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 5838c85e125SChristoph Hellwig 5846fd058f7STheodore Ts'o ext4_release_system_zone(sb); 585c9de560dSAlex Tomas ext4_mb_release(sb); 586a86c6181SAlex Tomas ext4_ext_release(sb); 587617ba13bSMingming Cao ext4_xattr_put_super(sb); 5880390131bSFrank Mayhar if (sbi->s_journal) { 589ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 59047b4a50bSJan Kara sbi->s_journal = NULL; 591ef2cabf7SHidehiro Kawai if (err < 0) 5920390131bSFrank Mayhar ext4_abort(sb, __func__, 5930390131bSFrank Mayhar "Couldn't clean up the journal"); 5940390131bSFrank Mayhar } 595ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 596617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 597ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 598e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 599ac27a0ecSDave Kleikamp } 600240799cdSTheodore Ts'o if (sbi->s_proc) { 6019f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 602240799cdSTheodore Ts'o } 6033197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 604ac27a0ecSDave Kleikamp 605ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 606ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 607ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 608c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 609c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 610c5ca7c76STheodore Ts'o else 611772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 612ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 613ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 614ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 6156bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 616ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 617ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 618ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 619ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 620ac27a0ecSDave Kleikamp #endif 621ac27a0ecSDave Kleikamp 622ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 623ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 624ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 625ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 626ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 627ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 628ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 629ac27a0ecSDave Kleikamp 630f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 631ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 632ac27a0ecSDave Kleikamp /* 633ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 634ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 635ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 636ac27a0ecSDave Kleikamp */ 637ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 638f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 639617ba13bSMingming Cao ext4_blkdev_remove(sbi); 640ac27a0ecSDave Kleikamp } 641ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 6423197ebdbSTheodore Ts'o /* 6433197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 6443197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 6453197ebdbSTheodore Ts'o */ 6463197ebdbSTheodore Ts'o unlock_kernel(); 6473197ebdbSTheodore Ts'o unlock_super(sb); 6483197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 6493197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 650705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 651ac27a0ecSDave Kleikamp kfree(sbi); 652ac27a0ecSDave Kleikamp } 653ac27a0ecSDave Kleikamp 654e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 655ac27a0ecSDave Kleikamp 656ac27a0ecSDave Kleikamp /* 657ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 658ac27a0ecSDave Kleikamp */ 659617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 660ac27a0ecSDave Kleikamp { 661617ba13bSMingming Cao struct ext4_inode_info *ei; 662ac27a0ecSDave Kleikamp 663e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 664ac27a0ecSDave Kleikamp if (!ei) 665ac27a0ecSDave Kleikamp return NULL; 6660b8e58a1SAndreas Dilger 66703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 668617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 669617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 670ac27a0ecSDave Kleikamp #endif 671ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 67291246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 673a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 674c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 675c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 6760390131bSFrank Mayhar /* 6770390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 6780390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 6790390131bSFrank Mayhar * jinode. 6800390131bSFrank Mayhar */ 681678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 682d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 683d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 684d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 685d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 686d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 6870b8e58a1SAndreas Dilger 688ac27a0ecSDave Kleikamp return &ei->vfs_inode; 689ac27a0ecSDave Kleikamp } 690ac27a0ecSDave Kleikamp 691617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 692ac27a0ecSDave Kleikamp { 6939f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 694b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 695b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 696b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 6979f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 6989f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 6999f7dd93dSVasily Averin true); 7009f7dd93dSVasily Averin dump_stack(); 7019f7dd93dSVasily Averin } 702617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 703ac27a0ecSDave Kleikamp } 704ac27a0ecSDave Kleikamp 70551cc5068SAlexey Dobriyan static void init_once(void *foo) 706ac27a0ecSDave Kleikamp { 707617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 708ac27a0ecSDave Kleikamp 709ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 71003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 711ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 712ac27a0ecSDave Kleikamp #endif 7130e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 714ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 715ac27a0ecSDave Kleikamp } 716ac27a0ecSDave Kleikamp 717ac27a0ecSDave Kleikamp static int init_inodecache(void) 718ac27a0ecSDave Kleikamp { 719617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 720617ba13bSMingming Cao sizeof(struct ext4_inode_info), 721ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 722ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 72320c2df83SPaul Mundt init_once); 724617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 725ac27a0ecSDave Kleikamp return -ENOMEM; 726ac27a0ecSDave Kleikamp return 0; 727ac27a0ecSDave Kleikamp } 728ac27a0ecSDave Kleikamp 729ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 730ac27a0ecSDave Kleikamp { 731617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 732ac27a0ecSDave Kleikamp } 733ac27a0ecSDave Kleikamp 734617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 735ac27a0ecSDave Kleikamp { 73603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 737617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 738617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 739617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 740617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 741ac27a0ecSDave Kleikamp } 742617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 743617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 744617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 745617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 746ac27a0ecSDave Kleikamp } 747ac27a0ecSDave Kleikamp #endif 748c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 7490390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 750678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 751678aaf48SJan Kara &EXT4_I(inode)->jinode); 752ac27a0ecSDave Kleikamp } 753ac27a0ecSDave Kleikamp 7542b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 7552b2d6d01STheodore Ts'o struct super_block *sb) 756ac27a0ecSDave Kleikamp { 757ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 758617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 759ac27a0ecSDave Kleikamp 760ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 761ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 762ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); 763ac27a0ecSDave Kleikamp 764ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 765ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 766ac27a0ecSDave Kleikamp 767ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 768ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 769ac27a0ecSDave Kleikamp 770617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 771ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 772ac27a0ecSDave Kleikamp 773617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 774ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 775ac27a0ecSDave Kleikamp #endif 776ac27a0ecSDave Kleikamp } 777ac27a0ecSDave Kleikamp 778d9c9bef1SMiklos Szeredi /* 779d9c9bef1SMiklos Szeredi * Show an option if 780d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 781d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 782d9c9bef1SMiklos Szeredi */ 783617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 784ac27a0ecSDave Kleikamp { 785aa22df2cSAneesh Kumar K.V int def_errors; 786aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 787ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 788d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 789d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 790d9c9bef1SMiklos Szeredi 791d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 792aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 793d9c9bef1SMiklos Szeredi 794d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 795d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 796d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 797d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 798aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 799d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 800d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 801d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 802d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 803d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 804d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 805d9c9bef1SMiklos Szeredi } 806d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 807d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 808d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 809d9c9bef1SMiklos Szeredi } 810bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 811d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 812bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 813d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 814bb4f397aSAneesh Kumar K.V } 815bb4f397aSAneesh Kumar K.V } 816aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 817bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 818aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 819d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 820aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 821d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 822aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 823d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 824d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 825d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 82603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 827aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 828aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 829d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 830d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 831d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 832d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 833d9c9bef1SMiklos Szeredi } 834d9c9bef1SMiklos Szeredi #endif 83503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 836aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 837d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 838d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 839d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 840d9c9bef1SMiklos Szeredi #endif 84130773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 842d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 843d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 844d9c9bef1SMiklos Szeredi } 84530773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 84630773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 84730773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 84830773840STheodore Ts'o } 84930773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 85030773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 85130773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 85230773840STheodore Ts'o } 85330773840STheodore Ts'o 854571640caSEric Sandeen /* 855571640caSEric Sandeen * We're changing the default of barrier mount option, so 856571640caSEric Sandeen * let's always display its mount state so it's clear what its 857571640caSEric Sandeen * status is. 858571640caSEric Sandeen */ 859571640caSEric Sandeen seq_puts(seq, ",barrier="); 860571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 861cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 862cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 863d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 864d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 86525ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 86625ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 867dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 868dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 869dd919b98SAneesh Kumar K.V 870ac27a0ecSDave Kleikamp 871cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 872cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 873aa22df2cSAneesh Kumar K.V /* 874aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 875aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 876aa22df2cSAneesh Kumar K.V */ 877617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 878ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 879617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 880ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 881617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 882ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 883ac27a0ecSDave Kleikamp 884240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 885240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 886240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 887240799cdSTheodore Ts'o 8885bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 8895bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 8905bf5683aSHidehiro Kawai 891afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 89206705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 893afd4672dSTheodore Ts'o 894617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 8950b8e58a1SAndreas Dilger 896ac27a0ecSDave Kleikamp return 0; 897ac27a0ecSDave Kleikamp } 898ac27a0ecSDave Kleikamp 8991b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9001b961ac0SChristoph Hellwig u64 ino, u32 generation) 901ac27a0ecSDave Kleikamp { 902ac27a0ecSDave Kleikamp struct inode *inode; 903ac27a0ecSDave Kleikamp 904617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 905ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 906617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 907ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 908ac27a0ecSDave Kleikamp 909ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 910ac27a0ecSDave Kleikamp * 911617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 912ac27a0ecSDave Kleikamp * deleted, so we should be safe. 913ac27a0ecSDave Kleikamp * 914ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 915ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 916ac27a0ecSDave Kleikamp */ 9171d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9181d1fe1eeSDavid Howells if (IS_ERR(inode)) 9191d1fe1eeSDavid Howells return ERR_CAST(inode); 9201d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 921ac27a0ecSDave Kleikamp iput(inode); 922ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 923ac27a0ecSDave Kleikamp } 9241b961ac0SChristoph Hellwig 9251b961ac0SChristoph Hellwig return inode; 926ac27a0ecSDave Kleikamp } 9271b961ac0SChristoph Hellwig 9281b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9291b961ac0SChristoph Hellwig int fh_len, int fh_type) 9301b961ac0SChristoph Hellwig { 9311b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9321b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9331b961ac0SChristoph Hellwig } 9341b961ac0SChristoph Hellwig 9351b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9361b961ac0SChristoph Hellwig int fh_len, int fh_type) 9371b961ac0SChristoph Hellwig { 9381b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9391b961ac0SChristoph Hellwig ext4_nfs_get_inode); 940ac27a0ecSDave Kleikamp } 941ac27a0ecSDave Kleikamp 942c39a7f84SToshiyuki Okajima /* 943c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 944c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 945c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 946c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 947c39a7f84SToshiyuki Okajima */ 9480b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 9490b8e58a1SAndreas Dilger gfp_t wait) 950c39a7f84SToshiyuki Okajima { 951c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 952c39a7f84SToshiyuki Okajima 953c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 954c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 955c39a7f84SToshiyuki Okajima return 0; 956c39a7f84SToshiyuki Okajima if (journal) 957c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 958c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 959c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 960c39a7f84SToshiyuki Okajima } 961c39a7f84SToshiyuki Okajima 962ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 963ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 964ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 965ac27a0ecSDave Kleikamp 966617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 967617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 968617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 969617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 970617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 9716f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 9726f28e087SJan Kara char *path, int remount); 973617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 974617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 975ac27a0ecSDave Kleikamp size_t len, loff_t off); 976617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 977ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 978ac27a0ecSDave Kleikamp 979617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 980edf72453SJan Kara .initialize = dquot_initialize, 981edf72453SJan Kara .drop = dquot_drop, 982ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 98360e58e0fSMingming Cao .reserve_space = dquot_reserve_space, 98460e58e0fSMingming Cao .claim_space = dquot_claim_space, 98560e58e0fSMingming Cao .release_rsv = dquot_release_reserved_space, 98660e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 987ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 988ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 989ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 990ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 991617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 992617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 993617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 994617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 995a5b5ee32SJan Kara .write_info = ext4_write_info, 996a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 997a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 998ac27a0ecSDave Kleikamp }; 999ac27a0ecSDave Kleikamp 1000617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 1001617ba13bSMingming Cao .quota_on = ext4_quota_on, 1002ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 1003ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 1004ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 1005ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 1006ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 1007ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 1008ac27a0ecSDave Kleikamp }; 1009ac27a0ecSDave Kleikamp #endif 1010ac27a0ecSDave Kleikamp 1011ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1012617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1013617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1014617ba13bSMingming Cao .write_inode = ext4_write_inode, 1015617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1016617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1017617ba13bSMingming Cao .put_super = ext4_put_super, 1018617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1019c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1020c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1021617ba13bSMingming Cao .statfs = ext4_statfs, 1022617ba13bSMingming Cao .remount_fs = ext4_remount, 1023617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1024617ba13bSMingming Cao .show_options = ext4_show_options, 1025ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1026617ba13bSMingming Cao .quota_read = ext4_quota_read, 1027617ba13bSMingming Cao .quota_write = ext4_quota_write, 1028ac27a0ecSDave Kleikamp #endif 1029c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1030ac27a0ecSDave Kleikamp }; 1031ac27a0ecSDave Kleikamp 10329ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 10339ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 10349ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 10359ca92389STheodore Ts'o .write_inode = ext4_write_inode, 10369ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 10379ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 10389ca92389STheodore Ts'o .write_super = ext4_write_super, 10399ca92389STheodore Ts'o .put_super = ext4_put_super, 10409ca92389STheodore Ts'o .statfs = ext4_statfs, 10419ca92389STheodore Ts'o .remount_fs = ext4_remount, 10429ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 10439ca92389STheodore Ts'o .show_options = ext4_show_options, 10449ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 10459ca92389STheodore Ts'o .quota_read = ext4_quota_read, 10469ca92389STheodore Ts'o .quota_write = ext4_quota_write, 10479ca92389STheodore Ts'o #endif 10489ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 10499ca92389STheodore Ts'o }; 10509ca92389STheodore Ts'o 105139655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 10521b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 10531b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1054617ba13bSMingming Cao .get_parent = ext4_get_parent, 1055ac27a0ecSDave Kleikamp }; 1056ac27a0ecSDave Kleikamp 1057ac27a0ecSDave Kleikamp enum { 1058ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1059ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 106001436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1061ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 106206705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 106330773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1064c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1065818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1066ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1067f4033903SCurt Wohlgemuth Opt_data_err_abort, Opt_data_err_ignore, Opt_mb_history_length, 1068ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 1069ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 107006705bffSTheodore Ts'o Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, 107106705bffSTheodore Ts'o Opt_usrquota, Opt_grpquota, Opt_i_version, 107201436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 10736fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 1074b3881f74STheodore Ts'o Opt_inode_readahead_blks, Opt_journal_ioprio 1075ac27a0ecSDave Kleikamp }; 1076ac27a0ecSDave Kleikamp 1077a447c093SSteven Whitehouse static const match_table_t tokens = { 1078ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1079ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1080ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1081ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1082ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1083ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1084ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1085ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1086ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1087ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1088ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1089ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1090ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1091ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1092ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1093ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1094ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1095ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1096ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1097ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1098ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1099ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1100ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1101ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 110230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 110330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1104ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1105ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1106818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1107818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1108ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1109ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1110ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1111ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11125bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11135bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1114f4033903SCurt Wohlgemuth {Opt_mb_history_length, "mb_history_length=%u"}, 1115ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1116ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1117ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1118ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1119ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1120ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 1121ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1122ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1123ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1124ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1125ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 112606705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 112706705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 112825ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1129c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1130ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 113164769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1132dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 11336fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11346fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1135240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1136b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1137afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 113806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 113906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1140f3f12faaSJosef Bacik {Opt_err, NULL}, 1141ac27a0ecSDave Kleikamp }; 1142ac27a0ecSDave Kleikamp 1143617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1144ac27a0ecSDave Kleikamp { 1145617ba13bSMingming Cao ext4_fsblk_t sb_block; 1146ac27a0ecSDave Kleikamp char *options = (char *) *data; 1147ac27a0ecSDave Kleikamp 1148ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1149ac27a0ecSDave Kleikamp return 1; /* Default location */ 11500b8e58a1SAndreas Dilger 1151ac27a0ecSDave Kleikamp options += 3; 11520b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1153ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1154ac27a0ecSDave Kleikamp if (*options && *options != ',') { 11554776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1156ac27a0ecSDave Kleikamp (char *) *data); 1157ac27a0ecSDave Kleikamp return 1; 1158ac27a0ecSDave Kleikamp } 1159ac27a0ecSDave Kleikamp if (*options == ',') 1160ac27a0ecSDave Kleikamp options++; 1161ac27a0ecSDave Kleikamp *data = (void *) options; 11620b8e58a1SAndreas Dilger 1163ac27a0ecSDave Kleikamp return sb_block; 1164ac27a0ecSDave Kleikamp } 1165ac27a0ecSDave Kleikamp 1166b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1167b3881f74STheodore Ts'o 1168ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1169c3191067STheodore Ts'o unsigned long *journal_devnum, 1170b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1171617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1172ac27a0ecSDave Kleikamp { 1173617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1174ac27a0ecSDave Kleikamp char *p; 1175ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1176ac27a0ecSDave Kleikamp int data_opt = 0; 1177ac27a0ecSDave Kleikamp int option; 1178ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1179dfc5d03fSJan Kara int qtype, qfmt; 1180ac27a0ecSDave Kleikamp char *qname; 1181ac27a0ecSDave Kleikamp #endif 1182ac27a0ecSDave Kleikamp 1183ac27a0ecSDave Kleikamp if (!options) 1184ac27a0ecSDave Kleikamp return 1; 1185ac27a0ecSDave Kleikamp 1186ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1187ac27a0ecSDave Kleikamp int token; 1188ac27a0ecSDave Kleikamp if (!*p) 1189ac27a0ecSDave Kleikamp continue; 1190ac27a0ecSDave Kleikamp 1191ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1192ac27a0ecSDave Kleikamp switch (token) { 1193ac27a0ecSDave Kleikamp case Opt_bsd_df: 1194ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1195ac27a0ecSDave Kleikamp break; 1196ac27a0ecSDave Kleikamp case Opt_minix_df: 1197ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1198ac27a0ecSDave Kleikamp break; 1199ac27a0ecSDave Kleikamp case Opt_grpid: 1200ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1201ac27a0ecSDave Kleikamp break; 1202ac27a0ecSDave Kleikamp case Opt_nogrpid: 1203ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1204ac27a0ecSDave Kleikamp break; 1205ac27a0ecSDave Kleikamp case Opt_resuid: 1206ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1207ac27a0ecSDave Kleikamp return 0; 1208ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1209ac27a0ecSDave Kleikamp break; 1210ac27a0ecSDave Kleikamp case Opt_resgid: 1211ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1212ac27a0ecSDave Kleikamp return 0; 1213ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1214ac27a0ecSDave Kleikamp break; 1215ac27a0ecSDave Kleikamp case Opt_sb: 1216ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1217ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1218ac27a0ecSDave Kleikamp break; 1219ac27a0ecSDave Kleikamp case Opt_err_panic: 1220ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1221ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1222ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1223ac27a0ecSDave Kleikamp break; 1224ac27a0ecSDave Kleikamp case Opt_err_ro: 1225ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1226ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1227ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1228ac27a0ecSDave Kleikamp break; 1229ac27a0ecSDave Kleikamp case Opt_err_cont: 1230ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1231ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1232ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1233ac27a0ecSDave Kleikamp break; 1234ac27a0ecSDave Kleikamp case Opt_nouid32: 1235ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1236ac27a0ecSDave Kleikamp break; 1237ac27a0ecSDave Kleikamp case Opt_debug: 1238ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1239ac27a0ecSDave Kleikamp break; 1240ac27a0ecSDave Kleikamp case Opt_oldalloc: 1241ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1242ac27a0ecSDave Kleikamp break; 1243ac27a0ecSDave Kleikamp case Opt_orlov: 1244ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1245ac27a0ecSDave Kleikamp break; 124603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1247ac27a0ecSDave Kleikamp case Opt_user_xattr: 1248ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1249ac27a0ecSDave Kleikamp break; 1250ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1251ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1252ac27a0ecSDave Kleikamp break; 1253ac27a0ecSDave Kleikamp #else 1254ac27a0ecSDave Kleikamp case Opt_user_xattr: 1255ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1257ac27a0ecSDave Kleikamp break; 1258ac27a0ecSDave Kleikamp #endif 125903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1260ac27a0ecSDave Kleikamp case Opt_acl: 1261ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1262ac27a0ecSDave Kleikamp break; 1263ac27a0ecSDave Kleikamp case Opt_noacl: 1264ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1265ac27a0ecSDave Kleikamp break; 1266ac27a0ecSDave Kleikamp #else 1267ac27a0ecSDave Kleikamp case Opt_acl: 1268ac27a0ecSDave Kleikamp case Opt_noacl: 1269b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1270ac27a0ecSDave Kleikamp break; 1271ac27a0ecSDave Kleikamp #endif 1272ac27a0ecSDave Kleikamp case Opt_journal_update: 1273ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1274ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1275ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1276ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1277ac27a0ecSDave Kleikamp journal file. */ 1278ac27a0ecSDave Kleikamp if (is_remount) { 1279b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1280b31e1552SEric Sandeen "Cannot specify journal on remount"); 1281ac27a0ecSDave Kleikamp return 0; 1282ac27a0ecSDave Kleikamp } 1283ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1284ac27a0ecSDave Kleikamp break; 1285ac27a0ecSDave Kleikamp case Opt_journal_dev: 1286ac27a0ecSDave Kleikamp if (is_remount) { 1287b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1288b31e1552SEric Sandeen "Cannot specify journal on remount"); 1289ac27a0ecSDave Kleikamp return 0; 1290ac27a0ecSDave Kleikamp } 1291ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1292ac27a0ecSDave Kleikamp return 0; 1293ac27a0ecSDave Kleikamp *journal_devnum = option; 1294ac27a0ecSDave Kleikamp break; 1295818d276cSGirish Shilamkar case Opt_journal_checksum: 1296818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1297818d276cSGirish Shilamkar break; 1298818d276cSGirish Shilamkar case Opt_journal_async_commit: 1299818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1300818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1301818d276cSGirish Shilamkar break; 1302ac27a0ecSDave Kleikamp case Opt_noload: 1303ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1304ac27a0ecSDave Kleikamp break; 1305ac27a0ecSDave Kleikamp case Opt_commit: 1306ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1307ac27a0ecSDave Kleikamp return 0; 1308ac27a0ecSDave Kleikamp if (option < 0) 1309ac27a0ecSDave Kleikamp return 0; 1310ac27a0ecSDave Kleikamp if (option == 0) 1311cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1312ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1313ac27a0ecSDave Kleikamp break; 131430773840STheodore Ts'o case Opt_max_batch_time: 131530773840STheodore Ts'o if (match_int(&args[0], &option)) 131630773840STheodore Ts'o return 0; 131730773840STheodore Ts'o if (option < 0) 131830773840STheodore Ts'o return 0; 131930773840STheodore Ts'o if (option == 0) 132030773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 132130773840STheodore Ts'o sbi->s_max_batch_time = option; 132230773840STheodore Ts'o break; 132330773840STheodore Ts'o case Opt_min_batch_time: 132430773840STheodore Ts'o if (match_int(&args[0], &option)) 132530773840STheodore Ts'o return 0; 132630773840STheodore Ts'o if (option < 0) 132730773840STheodore Ts'o return 0; 132830773840STheodore Ts'o sbi->s_min_batch_time = option; 132930773840STheodore Ts'o break; 1330ac27a0ecSDave Kleikamp case Opt_data_journal: 1331617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1332ac27a0ecSDave Kleikamp goto datacheck; 1333ac27a0ecSDave Kleikamp case Opt_data_ordered: 1334617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1335ac27a0ecSDave Kleikamp goto datacheck; 1336ac27a0ecSDave Kleikamp case Opt_data_writeback: 1337617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1338ac27a0ecSDave Kleikamp datacheck: 1339ac27a0ecSDave Kleikamp if (is_remount) { 1340617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1341ac27a0ecSDave Kleikamp != data_opt) { 1342b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1343b31e1552SEric Sandeen "Cannot change data mode on remount"); 1344ac27a0ecSDave Kleikamp return 0; 1345ac27a0ecSDave Kleikamp } 1346ac27a0ecSDave Kleikamp } else { 1347617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1348ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1349ac27a0ecSDave Kleikamp } 1350ac27a0ecSDave Kleikamp break; 13515bf5683aSHidehiro Kawai case Opt_data_err_abort: 13525bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13535bf5683aSHidehiro Kawai break; 13545bf5683aSHidehiro Kawai case Opt_data_err_ignore: 13555bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13565bf5683aSHidehiro Kawai break; 1357f4033903SCurt Wohlgemuth case Opt_mb_history_length: 1358f4033903SCurt Wohlgemuth if (match_int(&args[0], &option)) 1359f4033903SCurt Wohlgemuth return 0; 1360f4033903SCurt Wohlgemuth if (option < 0) 1361f4033903SCurt Wohlgemuth return 0; 1362f4033903SCurt Wohlgemuth sbi->s_mb_history_max = option; 1363f4033903SCurt Wohlgemuth break; 1364ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1365ac27a0ecSDave Kleikamp case Opt_usrjquota: 1366ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1367ac27a0ecSDave Kleikamp goto set_qf_name; 1368ac27a0ecSDave Kleikamp case Opt_grpjquota: 1369ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1370ac27a0ecSDave Kleikamp set_qf_name: 137117bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1372dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1373b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1374b31e1552SEric Sandeen "Cannot change journaled " 1375b31e1552SEric Sandeen "quota options when quota turned on"); 1376ac27a0ecSDave Kleikamp return 0; 1377ac27a0ecSDave Kleikamp } 1378ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1379ac27a0ecSDave Kleikamp if (!qname) { 1380b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1381b31e1552SEric Sandeen "Not enough memory for " 1382b31e1552SEric Sandeen "storing quotafile name"); 1383ac27a0ecSDave Kleikamp return 0; 1384ac27a0ecSDave Kleikamp } 1385ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1386ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1387b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1388b31e1552SEric Sandeen "%s quota file already " 1389b31e1552SEric Sandeen "specified", QTYPE2NAME(qtype)); 1390ac27a0ecSDave Kleikamp kfree(qname); 1391ac27a0ecSDave Kleikamp return 0; 1392ac27a0ecSDave Kleikamp } 1393ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1394ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1395b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1396b31e1552SEric Sandeen "quotafile must be on " 1397b31e1552SEric Sandeen "filesystem root"); 1398ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1399ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1400ac27a0ecSDave Kleikamp return 0; 1401ac27a0ecSDave Kleikamp } 1402ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1403ac27a0ecSDave Kleikamp break; 1404ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1405ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1406ac27a0ecSDave Kleikamp goto clear_qf_name; 1407ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1408ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1409ac27a0ecSDave Kleikamp clear_qf_name: 141017bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1411dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1412b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 14132c8be6b2SJan Kara "journaled quota options when " 1414b31e1552SEric Sandeen "quota turned on"); 1415ac27a0ecSDave Kleikamp return 0; 1416ac27a0ecSDave Kleikamp } 1417ac27a0ecSDave Kleikamp /* 1418ac27a0ecSDave Kleikamp * The space will be released later when all options 1419ac27a0ecSDave Kleikamp * are confirmed to be correct 1420ac27a0ecSDave Kleikamp */ 1421ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1422ac27a0ecSDave Kleikamp break; 1423ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1424dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1425dfc5d03fSJan Kara goto set_qf_format; 1426ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1427dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1428dfc5d03fSJan Kara set_qf_format: 142917bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1430dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1431b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1432dfc5d03fSJan Kara "journaled quota options when " 1433b31e1552SEric Sandeen "quota turned on"); 1434dfc5d03fSJan Kara return 0; 1435dfc5d03fSJan Kara } 1436dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1437ac27a0ecSDave Kleikamp break; 1438ac27a0ecSDave Kleikamp case Opt_quota: 1439ac27a0ecSDave Kleikamp case Opt_usrquota: 1440ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1441ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1442ac27a0ecSDave Kleikamp break; 1443ac27a0ecSDave Kleikamp case Opt_grpquota: 1444ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1445ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1446ac27a0ecSDave Kleikamp break; 1447ac27a0ecSDave Kleikamp case Opt_noquota: 144817bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1449b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1450b31e1552SEric Sandeen "options when quota turned on"); 1451ac27a0ecSDave Kleikamp return 0; 1452ac27a0ecSDave Kleikamp } 1453ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1454ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1455ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1456ac27a0ecSDave Kleikamp break; 1457ac27a0ecSDave Kleikamp #else 1458ac27a0ecSDave Kleikamp case Opt_quota: 1459ac27a0ecSDave Kleikamp case Opt_usrquota: 1460ac27a0ecSDave Kleikamp case Opt_grpquota: 1461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1462b31e1552SEric Sandeen "quota options not supported"); 1463cd59e7b9SJan Kara break; 1464ac27a0ecSDave Kleikamp case Opt_usrjquota: 1465ac27a0ecSDave Kleikamp case Opt_grpjquota: 1466ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1467ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1468ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1469ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1470b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1471b31e1552SEric Sandeen "journaled quota options not supported"); 1472ac27a0ecSDave Kleikamp break; 1473ac27a0ecSDave Kleikamp case Opt_noquota: 1474ac27a0ecSDave Kleikamp break; 1475ac27a0ecSDave Kleikamp #endif 1476ac27a0ecSDave Kleikamp case Opt_abort: 1477ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1478ac27a0ecSDave Kleikamp break; 147906705bffSTheodore Ts'o case Opt_nobarrier: 148006705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 148106705bffSTheodore Ts'o break; 1482ac27a0ecSDave Kleikamp case Opt_barrier: 148306705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 148406705bffSTheodore Ts'o set_opt(sbi->s_mount_opt, BARRIER); 148506705bffSTheodore Ts'o break; 148606705bffSTheodore Ts'o } 1487ac27a0ecSDave Kleikamp if (option) 1488ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1489ac27a0ecSDave Kleikamp else 1490ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1491ac27a0ecSDave Kleikamp break; 1492ac27a0ecSDave Kleikamp case Opt_ignore: 1493ac27a0ecSDave Kleikamp break; 1494ac27a0ecSDave Kleikamp case Opt_resize: 1495ac27a0ecSDave Kleikamp if (!is_remount) { 1496b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1497b31e1552SEric Sandeen "resize option only available " 1498b31e1552SEric Sandeen "for remount"); 1499ac27a0ecSDave Kleikamp return 0; 1500ac27a0ecSDave Kleikamp } 1501ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1502ac27a0ecSDave Kleikamp return 0; 1503ac27a0ecSDave Kleikamp *n_blocks_count = option; 1504ac27a0ecSDave Kleikamp break; 1505ac27a0ecSDave Kleikamp case Opt_nobh: 1506ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1507ac27a0ecSDave Kleikamp break; 1508ac27a0ecSDave Kleikamp case Opt_bh: 1509ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1510ac27a0ecSDave Kleikamp break; 151125ec56b5SJean Noel Cordenner case Opt_i_version: 151225ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 151325ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 151425ec56b5SJean Noel Cordenner break; 1515dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1516dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1517dd919b98SAneesh Kumar K.V break; 1518c9de560dSAlex Tomas case Opt_stripe: 1519c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1520c9de560dSAlex Tomas return 0; 1521c9de560dSAlex Tomas if (option < 0) 1522c9de560dSAlex Tomas return 0; 1523c9de560dSAlex Tomas sbi->s_stripe = option; 1524c9de560dSAlex Tomas break; 152564769240SAlex Tomas case Opt_delalloc: 152664769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 152764769240SAlex Tomas break; 15286fd058f7STheodore Ts'o case Opt_block_validity: 15296fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 15306fd058f7STheodore Ts'o break; 15316fd058f7STheodore Ts'o case Opt_noblock_validity: 15326fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 15336fd058f7STheodore Ts'o break; 1534240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1535240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1536240799cdSTheodore Ts'o return 0; 1537240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1538240799cdSTheodore Ts'o return 0; 1539f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1540b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1541b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1542b31e1552SEric Sandeen " must be a power of 2"); 15433197ebdbSTheodore Ts'o return 0; 15443197ebdbSTheodore Ts'o } 1545240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1546240799cdSTheodore Ts'o break; 1547b3881f74STheodore Ts'o case Opt_journal_ioprio: 1548b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1549b3881f74STheodore Ts'o return 0; 1550b3881f74STheodore Ts'o if (option < 0 || option > 7) 1551b3881f74STheodore Ts'o break; 1552b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1553b3881f74STheodore Ts'o option); 1554b3881f74STheodore Ts'o break; 155506705bffSTheodore Ts'o case Opt_noauto_da_alloc: 155606705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 155706705bffSTheodore Ts'o break; 1558afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 155906705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 156006705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 156106705bffSTheodore Ts'o break; 156206705bffSTheodore Ts'o } 1563afd4672dSTheodore Ts'o if (option) 1564afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1565afd4672dSTheodore Ts'o else 1566afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1567afd4672dSTheodore Ts'o break; 1568ac27a0ecSDave Kleikamp default: 1569b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1570b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1571b31e1552SEric Sandeen "or missing value", p); 1572ac27a0ecSDave Kleikamp return 0; 1573ac27a0ecSDave Kleikamp } 1574ac27a0ecSDave Kleikamp } 1575ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1576ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1577617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1578ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1579ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1580ac27a0ecSDave Kleikamp 1581617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1582ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1583ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1584ac27a0ecSDave Kleikamp 1585ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1586617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1587ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1588617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1589b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1590b31e1552SEric Sandeen "format mixing"); 1591ac27a0ecSDave Kleikamp return 0; 1592ac27a0ecSDave Kleikamp } 1593ac27a0ecSDave Kleikamp 1594ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1595b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1596b31e1552SEric Sandeen "not specified"); 1597ac27a0ecSDave Kleikamp return 0; 1598ac27a0ecSDave Kleikamp } 1599ac27a0ecSDave Kleikamp } else { 1600ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1601b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 16022c8be6b2SJan Kara "specified with no journaling " 1603b31e1552SEric Sandeen "enabled"); 1604ac27a0ecSDave Kleikamp return 0; 1605ac27a0ecSDave Kleikamp } 1606ac27a0ecSDave Kleikamp } 1607ac27a0ecSDave Kleikamp #endif 1608ac27a0ecSDave Kleikamp return 1; 1609ac27a0ecSDave Kleikamp } 1610ac27a0ecSDave Kleikamp 1611617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1612ac27a0ecSDave Kleikamp int read_only) 1613ac27a0ecSDave Kleikamp { 1614617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1615ac27a0ecSDave Kleikamp int res = 0; 1616ac27a0ecSDave Kleikamp 1617617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1618b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1619b31e1552SEric Sandeen "forcing read-only mode"); 1620ac27a0ecSDave Kleikamp res = MS_RDONLY; 1621ac27a0ecSDave Kleikamp } 1622ac27a0ecSDave Kleikamp if (read_only) 1623ac27a0ecSDave Kleikamp return res; 1624617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1625b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1626b31e1552SEric Sandeen "running e2fsck is recommended"); 1627617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1628b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1629b31e1552SEric Sandeen "warning: mounting fs with errors, " 1630b31e1552SEric Sandeen "running e2fsck is recommended"); 1631ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1632ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1633ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1634b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1635b31e1552SEric Sandeen "warning: maximal mount count reached, " 1636b31e1552SEric Sandeen "running e2fsck is recommended"); 1637ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1638ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1639ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1640b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1641b31e1552SEric Sandeen "warning: checktime reached, " 1642b31e1552SEric Sandeen "running e2fsck is recommended"); 16430390131bSFrank Mayhar if (!sbi->s_journal) 1644216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1645ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1646617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1647e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1648ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1649617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 16500390131bSFrank Mayhar if (sbi->s_journal) 1651617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1652ac27a0ecSDave Kleikamp 1653e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1654ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1655a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1656ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1657ac27a0ecSDave Kleikamp sb->s_blocksize, 1658ac27a0ecSDave Kleikamp sbi->s_groups_count, 1659617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1660617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1661ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1662ac27a0ecSDave Kleikamp 16630390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 1664b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%s journal on %s", 1665b31e1552SEric Sandeen EXT4_SB(sb)->s_journal->j_inode ? "internal" : 166605496769STheodore Ts'o "external", EXT4_SB(sb)->s_journal->j_devname); 16670390131bSFrank Mayhar } else { 1668b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "no journal"); 16690390131bSFrank Mayhar } 1670ac27a0ecSDave Kleikamp return res; 1671ac27a0ecSDave Kleikamp } 1672ac27a0ecSDave Kleikamp 1673772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1674772cb7c8SJose R. Santos { 1675772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1676772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1677772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1678772cb7c8SJose R. Santos ext4_group_t flex_group; 1679772cb7c8SJose R. Santos int groups_per_flex = 0; 1680c5ca7c76STheodore Ts'o size_t size; 1681772cb7c8SJose R. Santos int i; 1682772cb7c8SJose R. Santos 1683772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1684772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1685772cb7c8SJose R. Santos return 1; 1686772cb7c8SJose R. Santos } 1687772cb7c8SJose R. Santos 1688772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1689772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1690772cb7c8SJose R. Santos 1691c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1692c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1693d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1694d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1695c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1696c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1697c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1698c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1699c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1700c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1701c5ca7c76STheodore Ts'o } 1702772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1703b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1704b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1705772cb7c8SJose R. Santos goto failed; 1706772cb7c8SJose R. Santos } 1707772cb7c8SJose R. Santos 1708772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 170988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1710772cb7c8SJose R. Santos 1711772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 17129f24e420STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, 17139f24e420STheodore Ts'o ext4_free_inodes_count(sb, gdp)); 17149f24e420STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].free_blocks, 17159f24e420STheodore Ts'o ext4_free_blks_count(sb, gdp)); 17167d39db14STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].used_dirs, 17177d39db14STheodore Ts'o ext4_used_dirs_count(sb, gdp)); 1718772cb7c8SJose R. Santos } 1719772cb7c8SJose R. Santos 1720772cb7c8SJose R. Santos return 1; 1721772cb7c8SJose R. Santos failed: 1722772cb7c8SJose R. Santos return 0; 1723772cb7c8SJose R. Santos } 1724772cb7c8SJose R. Santos 1725717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1726717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1727717d50e4SAndreas Dilger { 1728717d50e4SAndreas Dilger __u16 crc = 0; 1729717d50e4SAndreas Dilger 1730717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1731717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1732717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1733717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1734717d50e4SAndreas Dilger 1735717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1736717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1737717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1738717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1739717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1740717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1741717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1742717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1743717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1744717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1745717d50e4SAndreas Dilger offset); 1746717d50e4SAndreas Dilger } 1747717d50e4SAndreas Dilger 1748717d50e4SAndreas Dilger return cpu_to_le16(crc); 1749717d50e4SAndreas Dilger } 1750717d50e4SAndreas Dilger 1751717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1752717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1753717d50e4SAndreas Dilger { 1754717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1755717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1756717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1757717d50e4SAndreas Dilger return 0; 1758717d50e4SAndreas Dilger 1759717d50e4SAndreas Dilger return 1; 1760717d50e4SAndreas Dilger } 1761717d50e4SAndreas Dilger 1762ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1763617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1764ac27a0ecSDave Kleikamp { 1765617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1766617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1767617ba13bSMingming Cao ext4_fsblk_t last_block; 1768bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1769bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1770bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1771ce421581SJose R. Santos int flexbg_flag = 0; 1772fd2d4291SAvantika Mathur ext4_group_t i; 1773ac27a0ecSDave Kleikamp 1774ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1775ce421581SJose R. Santos flexbg_flag = 1; 1776ce421581SJose R. Santos 1777617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1778ac27a0ecSDave Kleikamp 1779197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1780197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1781197cd65aSAkinobu Mita 1782ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1783bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1784ac27a0ecSDave Kleikamp else 1785ac27a0ecSDave Kleikamp last_block = first_block + 1786617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1787ac27a0ecSDave Kleikamp 17888fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 17892b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1790b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1791a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1792b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1793ac27a0ecSDave Kleikamp return 0; 1794ac27a0ecSDave Kleikamp } 17958fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 17962b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1797b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1798a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1799b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1800ac27a0ecSDave Kleikamp return 0; 1801ac27a0ecSDave Kleikamp } 18028fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1803bd81d8eeSLaurent Vivier if (inode_table < first_block || 18042b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1805b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1806a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1807b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1808ac27a0ecSDave Kleikamp return 0; 1809ac27a0ecSDave Kleikamp } 1810955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1811717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1812b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1813b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1814fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1815fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 18167ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1817955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1818717d50e4SAndreas Dilger return 0; 1819717d50e4SAndreas Dilger } 18207ee1ec4cSLi Zefan } 1821955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1822ce421581SJose R. Santos if (!flexbg_flag) 1823617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1824ac27a0ecSDave Kleikamp } 1825ac27a0ecSDave Kleikamp 1826bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1827617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1828ac27a0ecSDave Kleikamp return 1; 1829ac27a0ecSDave Kleikamp } 1830ac27a0ecSDave Kleikamp 1831617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1832ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1833ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1834ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1835ac27a0ecSDave Kleikamp * 1836ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1837ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1838ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1839ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1840ac27a0ecSDave Kleikamp * 1841ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1842ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1843ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1844617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1845ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1846ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1847ac27a0ecSDave Kleikamp */ 1848617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1849617ba13bSMingming Cao struct ext4_super_block *es) 1850ac27a0ecSDave Kleikamp { 1851ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1852ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1853ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1854ac27a0ecSDave Kleikamp int i; 1855ac27a0ecSDave Kleikamp #endif 1856ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1857ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1858ac27a0ecSDave Kleikamp return; 1859ac27a0ecSDave Kleikamp } 1860ac27a0ecSDave Kleikamp 1861a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1862b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 1863b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 1864a8f48a95SEric Sandeen return; 1865a8f48a95SEric Sandeen } 1866a8f48a95SEric Sandeen 1867617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1868ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1869ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1870ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1871ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1872ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1873ac27a0ecSDave Kleikamp return; 1874ac27a0ecSDave Kleikamp } 1875ac27a0ecSDave Kleikamp 1876ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1877b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 1878ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1879ac27a0ecSDave Kleikamp } 1880ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1881ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1882ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1883ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1884ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1885617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1886617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1887ac27a0ecSDave Kleikamp if (ret < 0) 1888b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1889b31e1552SEric Sandeen "Cannot turn on journaled " 1890b31e1552SEric Sandeen "quota: error %d", ret); 1891ac27a0ecSDave Kleikamp } 1892ac27a0ecSDave Kleikamp } 1893ac27a0ecSDave Kleikamp #endif 1894ac27a0ecSDave Kleikamp 1895ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1896ac27a0ecSDave Kleikamp struct inode *inode; 1897ac27a0ecSDave Kleikamp 189897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 189997bd42b9SJosef Bacik if (IS_ERR(inode)) { 1900ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1901ac27a0ecSDave Kleikamp break; 1902ac27a0ecSDave Kleikamp } 1903ac27a0ecSDave Kleikamp 1904617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1905a269eb18SJan Kara vfs_dq_init(inode); 1906ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1907b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1908b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 190946e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1910e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1911ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1912617ba13bSMingming Cao ext4_truncate(inode); 1913ac27a0ecSDave Kleikamp nr_truncates++; 1914ac27a0ecSDave Kleikamp } else { 1915b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1916b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 191746e665e9SHarvey Harrison __func__, inode->i_ino); 1918ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1919ac27a0ecSDave Kleikamp inode->i_ino); 1920ac27a0ecSDave Kleikamp nr_orphans++; 1921ac27a0ecSDave Kleikamp } 1922ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1923ac27a0ecSDave Kleikamp } 1924ac27a0ecSDave Kleikamp 1925ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1926ac27a0ecSDave Kleikamp 1927ac27a0ecSDave Kleikamp if (nr_orphans) 1928b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 1929b31e1552SEric Sandeen PLURAL(nr_orphans)); 1930ac27a0ecSDave Kleikamp if (nr_truncates) 1931b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 1932b31e1552SEric Sandeen PLURAL(nr_truncates)); 1933ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1934ac27a0ecSDave Kleikamp /* Turn quotas off */ 1935ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1936ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 19376f28e087SJan Kara vfs_quota_off(sb, i, 0); 1938ac27a0ecSDave Kleikamp } 1939ac27a0ecSDave Kleikamp #endif 1940ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1941ac27a0ecSDave Kleikamp } 19420b8e58a1SAndreas Dilger 1943cd2291a4SEric Sandeen /* 1944cd2291a4SEric Sandeen * Maximal extent format file size. 1945cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1946cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1947cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1948cd2291a4SEric Sandeen * so that won't be a limiting factor. 1949cd2291a4SEric Sandeen * 1950cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1951cd2291a4SEric Sandeen */ 1952f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 1953cd2291a4SEric Sandeen { 1954cd2291a4SEric Sandeen loff_t res; 1955cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1956cd2291a4SEric Sandeen 1957cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1958f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 1959cd2291a4SEric Sandeen /* 1960*90c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 1961cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1962cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1963cd2291a4SEric Sandeen */ 1964cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1965cd2291a4SEric Sandeen 1966cd2291a4SEric Sandeen /* total blocks in file system block size */ 1967cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1968cd2291a4SEric Sandeen upper_limit <<= blkbits; 1969cd2291a4SEric Sandeen } 1970cd2291a4SEric Sandeen 1971cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1972cd2291a4SEric Sandeen res = 1LL << 32; 1973cd2291a4SEric Sandeen res <<= blkbits; 1974cd2291a4SEric Sandeen res -= 1; 1975cd2291a4SEric Sandeen 1976cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1977cd2291a4SEric Sandeen if (res > upper_limit) 1978cd2291a4SEric Sandeen res = upper_limit; 1979cd2291a4SEric Sandeen 1980cd2291a4SEric Sandeen return res; 1981cd2291a4SEric Sandeen } 1982ac27a0ecSDave Kleikamp 1983ac27a0ecSDave Kleikamp /* 1984cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 19850fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 19860fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1987ac27a0ecSDave Kleikamp */ 1988f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 1989ac27a0ecSDave Kleikamp { 1990617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 19910fc1b451SAneesh Kumar K.V int meta_blocks; 19920fc1b451SAneesh Kumar K.V loff_t upper_limit; 19930b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 19940b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 19950b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 19960b8e58a1SAndreas Dilger * 19970b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 19980b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 19990fc1b451SAneesh Kumar K.V */ 20000fc1b451SAneesh Kumar K.V 2001f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 20020fc1b451SAneesh Kumar K.V /* 2003*90c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 20040b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 20050b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 20060fc1b451SAneesh Kumar K.V */ 20070fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 20080fc1b451SAneesh Kumar K.V 20090fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 20100fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 20110fc1b451SAneesh Kumar K.V 20120fc1b451SAneesh Kumar K.V } else { 20138180a562SAneesh Kumar K.V /* 20148180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 20158180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 20168180a562SAneesh Kumar K.V * represent total number of blocks in 20178180a562SAneesh Kumar K.V * file system block size 20188180a562SAneesh Kumar K.V */ 20190fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 20200fc1b451SAneesh Kumar K.V 20210fc1b451SAneesh Kumar K.V } 20220fc1b451SAneesh Kumar K.V 20230fc1b451SAneesh Kumar K.V /* indirect blocks */ 20240fc1b451SAneesh Kumar K.V meta_blocks = 1; 20250fc1b451SAneesh Kumar K.V /* double indirect blocks */ 20260fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 20270fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 20280fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 20290fc1b451SAneesh Kumar K.V 20300fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 20310fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2032ac27a0ecSDave Kleikamp 2033ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2034ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2035ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2036ac27a0ecSDave Kleikamp res <<= bits; 2037ac27a0ecSDave Kleikamp if (res > upper_limit) 2038ac27a0ecSDave Kleikamp res = upper_limit; 20390fc1b451SAneesh Kumar K.V 20400fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 20410fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 20420fc1b451SAneesh Kumar K.V 2043ac27a0ecSDave Kleikamp return res; 2044ac27a0ecSDave Kleikamp } 2045ac27a0ecSDave Kleikamp 2046617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 204770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2048ac27a0ecSDave Kleikamp { 2049617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2050fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2051ac27a0ecSDave Kleikamp int has_super = 0; 2052ac27a0ecSDave Kleikamp 2053ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2054ac27a0ecSDave Kleikamp 2055617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2056ac27a0ecSDave Kleikamp nr < first_meta_bg) 205770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2058ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2059617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2060ac27a0ecSDave Kleikamp has_super = 1; 20610b8e58a1SAndreas Dilger 2062617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2063ac27a0ecSDave Kleikamp } 2064ac27a0ecSDave Kleikamp 2065c9de560dSAlex Tomas /** 2066c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2067c9de560dSAlex Tomas * @sbi: In memory super block info 2068c9de560dSAlex Tomas * 2069c9de560dSAlex Tomas * If we have specified it via mount option, then 2070c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2071c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2072c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2073c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2074c9de560dSAlex Tomas * 2075c9de560dSAlex Tomas */ 2076c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2077c9de560dSAlex Tomas { 2078c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2079c9de560dSAlex Tomas unsigned long stripe_width = 2080c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2081c9de560dSAlex Tomas 2082c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2083c9de560dSAlex Tomas return sbi->s_stripe; 2084c9de560dSAlex Tomas 2085c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2086c9de560dSAlex Tomas return stripe_width; 2087c9de560dSAlex Tomas 2088c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2089c9de560dSAlex Tomas return stride; 2090c9de560dSAlex Tomas 2091c9de560dSAlex Tomas return 0; 2092c9de560dSAlex Tomas } 2093ac27a0ecSDave Kleikamp 20943197ebdbSTheodore Ts'o /* sysfs supprt */ 20953197ebdbSTheodore Ts'o 20963197ebdbSTheodore Ts'o struct ext4_attr { 20973197ebdbSTheodore Ts'o struct attribute attr; 20983197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 20993197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 21003197ebdbSTheodore Ts'o const char *, size_t); 21013197ebdbSTheodore Ts'o int offset; 21023197ebdbSTheodore Ts'o }; 21033197ebdbSTheodore Ts'o 21043197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 21053197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 21063197ebdbSTheodore Ts'o { 21073197ebdbSTheodore Ts'o char *endp; 21083197ebdbSTheodore Ts'o 21093197ebdbSTheodore Ts'o while (*buf && isspace(*buf)) 21103197ebdbSTheodore Ts'o buf++; 21113197ebdbSTheodore Ts'o *value = simple_strtoul(buf, &endp, 0); 21123197ebdbSTheodore Ts'o while (*endp && isspace(*endp)) 21133197ebdbSTheodore Ts'o endp++; 21143197ebdbSTheodore Ts'o if (*endp || *value > max) 21153197ebdbSTheodore Ts'o return -EINVAL; 21163197ebdbSTheodore Ts'o 21173197ebdbSTheodore Ts'o return 0; 21183197ebdbSTheodore Ts'o } 21193197ebdbSTheodore Ts'o 21203197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 21213197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21223197ebdbSTheodore Ts'o char *buf) 21233197ebdbSTheodore Ts'o { 21243197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 21253197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 21263197ebdbSTheodore Ts'o } 21273197ebdbSTheodore Ts'o 21283197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 21293197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21303197ebdbSTheodore Ts'o { 21313197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 21323197ebdbSTheodore Ts'o 21333197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 21343197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 21353197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 21363197ebdbSTheodore Ts'o } 21373197ebdbSTheodore Ts'o 21383197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 21393197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21403197ebdbSTheodore Ts'o { 21413197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 21423197ebdbSTheodore Ts'o 21433197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 21443197ebdbSTheodore Ts'o sbi->s_kbytes_written + 21453197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 21463197ebdbSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 21473197ebdbSTheodore Ts'o } 21483197ebdbSTheodore Ts'o 21493197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 21503197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21513197ebdbSTheodore Ts'o const char *buf, size_t count) 21523197ebdbSTheodore Ts'o { 21533197ebdbSTheodore Ts'o unsigned long t; 21543197ebdbSTheodore Ts'o 21553197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 21563197ebdbSTheodore Ts'o return -EINVAL; 21573197ebdbSTheodore Ts'o 2158f7c43950STheodore Ts'o if (!is_power_of_2(t)) 21593197ebdbSTheodore Ts'o return -EINVAL; 21603197ebdbSTheodore Ts'o 21613197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 21623197ebdbSTheodore Ts'o return count; 21633197ebdbSTheodore Ts'o } 21643197ebdbSTheodore Ts'o 21653197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 21663197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21673197ebdbSTheodore Ts'o { 21683197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 21693197ebdbSTheodore Ts'o 21703197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 21713197ebdbSTheodore Ts'o } 21723197ebdbSTheodore Ts'o 21733197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 21743197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21753197ebdbSTheodore Ts'o const char *buf, size_t count) 21763197ebdbSTheodore Ts'o { 21773197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 21783197ebdbSTheodore Ts'o unsigned long t; 21793197ebdbSTheodore Ts'o 21803197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 21813197ebdbSTheodore Ts'o return -EINVAL; 21823197ebdbSTheodore Ts'o *ui = t; 21833197ebdbSTheodore Ts'o return count; 21843197ebdbSTheodore Ts'o } 21853197ebdbSTheodore Ts'o 21863197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 21873197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 21883197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 21893197ebdbSTheodore Ts'o .show = _show, \ 21903197ebdbSTheodore Ts'o .store = _store, \ 21913197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 21923197ebdbSTheodore Ts'o } 21933197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 21943197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 21953197ebdbSTheodore Ts'o 21963197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 21973197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 21983197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 21993197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 22003197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 22013197ebdbSTheodore Ts'o 22023197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 22033197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 22043197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 22053197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 22063197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 22073197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 22083197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 22093197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 22103197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 22113197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 22123197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 22133197ebdbSTheodore Ts'o 22143197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 22153197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 22163197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 22173197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 22183197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 22193197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 22203197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 22213197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 22223197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 22233197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 22243197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 22253197ebdbSTheodore Ts'o NULL, 22263197ebdbSTheodore Ts'o }; 22273197ebdbSTheodore Ts'o 22283197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 22293197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 22303197ebdbSTheodore Ts'o { 22313197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22323197ebdbSTheodore Ts'o s_kobj); 22333197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 22343197ebdbSTheodore Ts'o 22353197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 22363197ebdbSTheodore Ts'o } 22373197ebdbSTheodore Ts'o 22383197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 22393197ebdbSTheodore Ts'o struct attribute *attr, 22403197ebdbSTheodore Ts'o const char *buf, size_t len) 22413197ebdbSTheodore Ts'o { 22423197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22433197ebdbSTheodore Ts'o s_kobj); 22443197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 22453197ebdbSTheodore Ts'o 22463197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 22473197ebdbSTheodore Ts'o } 22483197ebdbSTheodore Ts'o 22493197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 22503197ebdbSTheodore Ts'o { 22513197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22523197ebdbSTheodore Ts'o s_kobj); 22533197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 22543197ebdbSTheodore Ts'o } 22553197ebdbSTheodore Ts'o 22563197ebdbSTheodore Ts'o 22573197ebdbSTheodore Ts'o static struct sysfs_ops ext4_attr_ops = { 22583197ebdbSTheodore Ts'o .show = ext4_attr_show, 22593197ebdbSTheodore Ts'o .store = ext4_attr_store, 22603197ebdbSTheodore Ts'o }; 22613197ebdbSTheodore Ts'o 22623197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 22633197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 22643197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 22653197ebdbSTheodore Ts'o .release = ext4_sb_release, 22663197ebdbSTheodore Ts'o }; 22673197ebdbSTheodore Ts'o 2268617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 22697477827fSAneesh Kumar K.V __releases(kernel_lock) 22707477827fSAneesh Kumar K.V __acquires(kernel_lock) 2271ac27a0ecSDave Kleikamp { 2272ac27a0ecSDave Kleikamp struct buffer_head *bh; 2273617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2274617ba13bSMingming Cao struct ext4_sb_info *sbi; 2275617ba13bSMingming Cao ext4_fsblk_t block; 2276617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 227770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2278ac27a0ecSDave Kleikamp unsigned long offset = 0; 2279ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2280ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2281ac27a0ecSDave Kleikamp struct inode *root; 22829f6200bbSTheodore Ts'o char *cp; 22830390131bSFrank Mayhar const char *descr; 22841d1fe1eeSDavid Howells int ret = -EINVAL; 2285ac27a0ecSDave Kleikamp int blocksize; 22864ec11028STheodore Ts'o unsigned int db_count; 22874ec11028STheodore Ts'o unsigned int i; 2288f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 22893a06d778SAneesh Kumar K.V int features; 2290bd81d8eeSLaurent Vivier __u64 blocks_count; 2291833f4077SPeter Zijlstra int err; 2292b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2293ac27a0ecSDave Kleikamp 2294ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2295ac27a0ecSDave Kleikamp if (!sbi) 2296ac27a0ecSDave Kleikamp return -ENOMEM; 2297705895b6SPekka Enberg 2298705895b6SPekka Enberg sbi->s_blockgroup_lock = 2299705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2300705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2301705895b6SPekka Enberg kfree(sbi); 2302705895b6SPekka Enberg return -ENOMEM; 2303705895b6SPekka Enberg } 2304ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2305ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2306617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2307617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2308240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2309d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2310afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2311afc32f7eSTheodore Ts'o sectors[1]); 2312ac27a0ecSDave Kleikamp 2313ac27a0ecSDave Kleikamp unlock_kernel(); 2314ac27a0ecSDave Kleikamp 23159f6200bbSTheodore Ts'o /* Cleanup superblock name */ 23169f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 23179f6200bbSTheodore Ts'o *cp = '!'; 23189f6200bbSTheodore Ts'o 2319617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2320ac27a0ecSDave Kleikamp if (!blocksize) { 2321b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2322ac27a0ecSDave Kleikamp goto out_fail; 2323ac27a0ecSDave Kleikamp } 2324ac27a0ecSDave Kleikamp 2325ac27a0ecSDave Kleikamp /* 2326617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2327ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2328ac27a0ecSDave Kleikamp */ 2329617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 233070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 233170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2332ac27a0ecSDave Kleikamp } else { 233370bbb3e0SAndrew Morton logical_sb_block = sb_block; 2334ac27a0ecSDave Kleikamp } 2335ac27a0ecSDave Kleikamp 233670bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2337b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2338ac27a0ecSDave Kleikamp goto out_fail; 2339ac27a0ecSDave Kleikamp } 2340ac27a0ecSDave Kleikamp /* 2341ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2342617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2343ac27a0ecSDave Kleikamp */ 2344617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2345ac27a0ecSDave Kleikamp sbi->s_es = es; 2346ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2347617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2348617ba13bSMingming Cao goto cantfind_ext4; 2349afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2350ac27a0ecSDave Kleikamp 2351ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2352ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2353617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2354ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2355617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 2356ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2357617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2358ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 235903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2360617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2361ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 23622e7842b8SHugh Dickins #endif 236303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2364617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2365ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 23662e7842b8SHugh Dickins #endif 2367617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2368617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2369617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2370617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2371617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2372617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2373ac27a0ecSDave Kleikamp 2374617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2375ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2376bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2377ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2378bb4f397aSAneesh Kumar K.V else 2379bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2380ac27a0ecSDave Kleikamp 2381ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2382ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 238330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 238430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 238530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2386f4033903SCurt Wohlgemuth sbi->s_mb_history_max = default_mb_history_length; 2387ac27a0ecSDave Kleikamp 2388571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2389ac27a0ecSDave Kleikamp 23901e2462f9SMingming Cao /* 2391dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2392dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2393dd919b98SAneesh Kumar K.V */ 2394dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2395dd919b98SAneesh Kumar K.V 2396b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2397b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2398ac27a0ecSDave Kleikamp goto failed_mount; 2399ac27a0ecSDave Kleikamp 2400ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2401617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2402ac27a0ecSDave Kleikamp 2403617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2404617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2405617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2406617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2407b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2408b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2409b31e1552SEric Sandeen "running e2fsck is recommended"); 2410469108ffSTheodore Tso 2411469108ffSTheodore Tso /* 2412ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2413ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2414ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2415ac27a0ecSDave Kleikamp */ 2416617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 2417ac27a0ecSDave Kleikamp if (features) { 2418b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2419b31e1552SEric Sandeen "Couldn't mount because of " 2420b31e1552SEric Sandeen "unsupported optional features (%x)", 24213a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 24223a06d778SAneesh Kumar K.V ~EXT4_FEATURE_INCOMPAT_SUPP)); 2423ac27a0ecSDave Kleikamp goto failed_mount; 2424ac27a0ecSDave Kleikamp } 2425617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 2426ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 2427b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2428b31e1552SEric Sandeen "Couldn't mount RDWR because of " 2429b31e1552SEric Sandeen "unsupported optional features (%x)", 24303a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 24313a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2432ac27a0ecSDave Kleikamp goto failed_mount; 2433ac27a0ecSDave Kleikamp } 2434f287a1a5STheodore Ts'o has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2435f287a1a5STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2436f287a1a5STheodore Ts'o if (has_huge_files) { 24370fc1b451SAneesh Kumar K.V /* 24380fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 2439*90c699a9SBartlomiej Zolnierkiewicz * mount if kernel is build with CONFIG_LBDAF 24400fc1b451SAneesh Kumar K.V */ 24410fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 24420fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 2443b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge " 24440fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 2445*90c699a9SBartlomiej Zolnierkiewicz "without CONFIG_LBDAF"); 24460fc1b451SAneesh Kumar K.V goto failed_mount; 24470fc1b451SAneesh Kumar K.V } 24480fc1b451SAneesh Kumar K.V } 2449ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2450ac27a0ecSDave Kleikamp 2451617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2452617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2453b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2454b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2455ac27a0ecSDave Kleikamp goto failed_mount; 2456ac27a0ecSDave Kleikamp } 2457ac27a0ecSDave Kleikamp 2458ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2459ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2460ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2462ce40733cSAneesh Kumar K.V blocksize); 2463ac27a0ecSDave Kleikamp goto failed_mount; 2464ac27a0ecSDave Kleikamp } 2465ac27a0ecSDave Kleikamp 2466ac27a0ecSDave Kleikamp brelse(bh); 246770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 246870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 246970bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2470ac27a0ecSDave Kleikamp if (!bh) { 2471b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2472b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2473ac27a0ecSDave Kleikamp goto failed_mount; 2474ac27a0ecSDave Kleikamp } 2475617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2476ac27a0ecSDave Kleikamp sbi->s_es = es; 2477617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2478b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2479b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2480ac27a0ecSDave Kleikamp goto failed_mount; 2481ac27a0ecSDave Kleikamp } 2482ac27a0ecSDave Kleikamp } 2483ac27a0ecSDave Kleikamp 2484f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2485f287a1a5STheodore Ts'o has_huge_files); 2486f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2487ac27a0ecSDave Kleikamp 2488617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2489617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2490617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2491ac27a0ecSDave Kleikamp } else { 2492ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2493ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2494617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 24951330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2496ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2497b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2498b31e1552SEric Sandeen "unsupported inode size: %d", 2499ac27a0ecSDave Kleikamp sbi->s_inode_size); 2500ac27a0ecSDave Kleikamp goto failed_mount; 2501ac27a0ecSDave Kleikamp } 2502ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2503ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2504ac27a0ecSDave Kleikamp } 25050b8e58a1SAndreas Dilger 25060d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 25070d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 25088fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 25090d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2510d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2511b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2512b31e1552SEric Sandeen "unsupported descriptor size %lu", 25130d1ee42fSAlexandre Ratchov sbi->s_desc_size); 25140d1ee42fSAlexandre Ratchov goto failed_mount; 25150d1ee42fSAlexandre Ratchov } 25160d1ee42fSAlexandre Ratchov } else 25170d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 25180b8e58a1SAndreas Dilger 2519ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2520ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2521b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2522617ba13bSMingming Cao goto cantfind_ext4; 25230b8e58a1SAndreas Dilger 2524617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2525ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2526617ba13bSMingming Cao goto cantfind_ext4; 2527ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2528ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 25290d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2530ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2531ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2532e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2533e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 25340b8e58a1SAndreas Dilger 2535ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2536ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2537ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2538f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2539f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2540f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2541f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2542f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2543f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2544f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2545f99b2589STheodore Ts'o #else 2546f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2547f99b2589STheodore Ts'o #endif 2548f99b2589STheodore Ts'o sb->s_dirt = 1; 2549f99b2589STheodore Ts'o } 2550ac27a0ecSDave Kleikamp 2551ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2552b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2553b31e1552SEric Sandeen "#blocks per group too big: %lu", 2554ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2555ac27a0ecSDave Kleikamp goto failed_mount; 2556ac27a0ecSDave Kleikamp } 2557ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2558b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2559b31e1552SEric Sandeen "#inodes per group too big: %lu", 2560ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2561ac27a0ecSDave Kleikamp goto failed_mount; 2562ac27a0ecSDave Kleikamp } 2563ac27a0ecSDave Kleikamp 2564bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2565ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2566b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2567b31e1552SEric Sandeen " too large to mount safely"); 2568ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2569*90c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2570ac27a0ecSDave Kleikamp goto failed_mount; 2571ac27a0ecSDave Kleikamp } 2572ac27a0ecSDave Kleikamp 2573617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2574617ba13bSMingming Cao goto cantfind_ext4; 2575e7c95593SEric Sandeen 25760f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 25770f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 25780f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2579b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2580b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 25810f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 25820f2ddca6SFrom: Thiemo Nagel goto failed_mount; 25830f2ddca6SFrom: Thiemo Nagel } 25840f2ddca6SFrom: Thiemo Nagel 25854ec11028STheodore Ts'o /* 25864ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 25874ec11028STheodore Ts'o * of the filesystem. 25884ec11028STheodore Ts'o */ 25894ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2590b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2591b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2592e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 25934ec11028STheodore Ts'o ext4_blocks_count(es)); 2594e7c95593SEric Sandeen goto failed_mount; 2595e7c95593SEric Sandeen } 2596bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2597bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2598bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2599bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 26004ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2601b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 26024ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2603b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 26044ec11028STheodore Ts'o ext4_blocks_count(es), 26054ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 26064ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 26074ec11028STheodore Ts'o goto failed_mount; 26084ec11028STheodore Ts'o } 2609bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2610617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2611617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2612ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2613ac27a0ecSDave Kleikamp GFP_KERNEL); 2614ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2615b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2616ac27a0ecSDave Kleikamp goto failed_mount; 2617ac27a0ecSDave Kleikamp } 2618ac27a0ecSDave Kleikamp 26193244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 26209f6200bbSTheodore Ts'o if (ext4_proc_root) 26219f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 26223244fcb1SAlexander Beregalov #endif 2623240799cdSTheodore Ts'o 2624705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2625ac27a0ecSDave Kleikamp 2626ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 262770bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2628ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2629ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2630b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2631b31e1552SEric Sandeen "can't read group descriptor %d", i); 2632ac27a0ecSDave Kleikamp db_count = i; 2633ac27a0ecSDave Kleikamp goto failed_mount2; 2634ac27a0ecSDave Kleikamp } 2635ac27a0ecSDave Kleikamp } 2636617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2637b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2638ac27a0ecSDave Kleikamp goto failed_mount2; 2639ac27a0ecSDave Kleikamp } 2640772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2641772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2642b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2643b31e1552SEric Sandeen "unable to initialize " 2644b31e1552SEric Sandeen "flex_bg meta info!"); 2645772cb7c8SJose R. Santos goto failed_mount2; 2646772cb7c8SJose R. Santos } 2647772cb7c8SJose R. Santos 2648ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2649ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2650ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2651ac27a0ecSDave Kleikamp 2652833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2653617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2654833f4077SPeter Zijlstra if (!err) { 2655833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2656617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2657833f4077SPeter Zijlstra } 2658833f4077SPeter Zijlstra if (!err) { 2659833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2660617ba13bSMingming Cao ext4_count_dirs(sb)); 2661833f4077SPeter Zijlstra } 26626bc6e63fSAneesh Kumar K.V if (!err) { 26636bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 26646bc6e63fSAneesh Kumar K.V } 2665833f4077SPeter Zijlstra if (err) { 2666b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "insufficient memory"); 2667833f4077SPeter Zijlstra goto failed_mount3; 2668833f4077SPeter Zijlstra } 2669ac27a0ecSDave Kleikamp 2670c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2671c9de560dSAlex Tomas 2672ac27a0ecSDave Kleikamp /* 2673ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2674ac27a0ecSDave Kleikamp */ 26759ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 26769ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2677617ba13bSMingming Cao sb->s_op = &ext4_sops; 26789ca92389STheodore Ts'o else 26799ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2680617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2681617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2682ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2683617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2684617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2685ac27a0ecSDave Kleikamp #endif 2686ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 26873b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 268832ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2689ac27a0ecSDave Kleikamp 2690ac27a0ecSDave Kleikamp sb->s_root = NULL; 2691ac27a0ecSDave Kleikamp 2692ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2693617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2694617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2695ac27a0ecSDave Kleikamp 2696ac27a0ecSDave Kleikamp /* 2697ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2698ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2699ac27a0ecSDave Kleikamp */ 2700ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2701617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2702617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2703ac27a0ecSDave Kleikamp goto failed_mount3; 2704624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2705624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2706b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "error: " 2707624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2708b31e1552SEric Sandeen "%u is corrupt", 2709624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2710624080edSTheodore Ts'o if (test_opt(sb, ERRORS_RO)) { 2711b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, 2712b31e1552SEric Sandeen "Mounting filesystem read-only"); 2713624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2714624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2715624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2716624080edSTheodore Ts'o } 2717624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2718624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2719624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2720e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2721624080edSTheodore Ts'o goto failed_mount4; 2722624080edSTheodore Ts'o } 2723624080edSTheodore Ts'o } 27240390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 27250390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2726b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2727b31e1552SEric Sandeen "suppressed and not mounted read-only"); 27280390131bSFrank Mayhar goto failed_mount4; 2729ac27a0ecSDave Kleikamp } else { 27300390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 27310390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 27320390131bSFrank Mayhar sbi->s_journal = NULL; 27330390131bSFrank Mayhar needs_recovery = 0; 27340390131bSFrank Mayhar goto no_journal; 2735ac27a0ecSDave Kleikamp } 2736ac27a0ecSDave Kleikamp 2737eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2738eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2739eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2740b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2741eb40a09cSJose R. Santos goto failed_mount4; 2742eb40a09cSJose R. Santos } 2743eb40a09cSJose R. Santos 2744818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2745818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2746818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2747818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2748818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2749818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2750818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2751818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2752818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2753818d276cSGirish Shilamkar } else { 2754818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2755818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2756818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2757818d276cSGirish Shilamkar } 2758818d276cSGirish Shilamkar 2759ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2760ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2761ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2762ac27a0ecSDave Kleikamp case 0: 2763ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 276463f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 276563f57933SAndrew Morton * cope, else JOURNAL_DATA 276663f57933SAndrew Morton */ 2767dab291afSMingming Cao if (jbd2_journal_check_available_features 2768dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2769ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2770ac27a0ecSDave Kleikamp else 2771ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2772ac27a0ecSDave Kleikamp break; 2773ac27a0ecSDave Kleikamp 2774617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2775617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2776dab291afSMingming Cao if (!jbd2_journal_check_available_features 2777dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2778b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2779b31e1552SEric Sandeen "requested data journaling mode"); 2780ac27a0ecSDave Kleikamp goto failed_mount4; 2781ac27a0ecSDave Kleikamp } 2782ac27a0ecSDave Kleikamp default: 2783ac27a0ecSDave Kleikamp break; 2784ac27a0ecSDave Kleikamp } 2785b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2786ac27a0ecSDave Kleikamp 27870390131bSFrank Mayhar no_journal: 2788ac27a0ecSDave Kleikamp 2789ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2790617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2791b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " 2792b31e1552SEric Sandeen "its supported only with writeback mode"); 2793ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2794ac27a0ecSDave Kleikamp } 2795ac27a0ecSDave Kleikamp } 2796ac27a0ecSDave Kleikamp /* 2797dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2798ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2799ac27a0ecSDave Kleikamp */ 2800ac27a0ecSDave Kleikamp 28011d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 28021d1fe1eeSDavid Howells if (IS_ERR(root)) { 2803b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 28041d1fe1eeSDavid Howells ret = PTR_ERR(root); 2805ac27a0ecSDave Kleikamp goto failed_mount4; 2806ac27a0ecSDave Kleikamp } 2807ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 28081d1fe1eeSDavid Howells iput(root); 2809b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2810ac27a0ecSDave Kleikamp goto failed_mount4; 2811ac27a0ecSDave Kleikamp } 28121d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 28131d1fe1eeSDavid Howells if (!sb->s_root) { 2814b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 28151d1fe1eeSDavid Howells iput(root); 28161d1fe1eeSDavid Howells ret = -ENOMEM; 28171d1fe1eeSDavid Howells goto failed_mount4; 28181d1fe1eeSDavid Howells } 2819ac27a0ecSDave Kleikamp 2820617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2821ef7f3835SKalpak Shah 2822ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2823ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2824ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2825ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2826ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2827ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2828ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2829ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2830ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2831ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2832ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2833ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2834ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2835ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2836ef7f3835SKalpak Shah } 2837ef7f3835SKalpak Shah } 2838ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2839ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2840ef7f3835SKalpak Shah sbi->s_inode_size) { 2841ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2842ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2843b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2844b31e1552SEric Sandeen "available"); 2845ef7f3835SKalpak Shah } 2846ef7f3835SKalpak Shah 2847c2774d84SAneesh Kumar K.V if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2848b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2849b31e1552SEric Sandeen "requested data journaling mode"); 2850c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 2851c2774d84SAneesh Kumar K.V } else if (test_opt(sb, DELALLOC)) 2852b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "delayed allocation enabled"); 2853c2774d84SAneesh Kumar K.V 28546fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 28556fd058f7STheodore Ts'o if (err) { 2856b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 28576fd058f7STheodore Ts'o "zone (%d)\n", err); 28586fd058f7STheodore Ts'o goto failed_mount4; 28596fd058f7STheodore Ts'o } 28606fd058f7STheodore Ts'o 2861c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2862c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2863c2774d84SAneesh Kumar K.V if (err) { 2864b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 2865c2774d84SAneesh Kumar K.V err); 2866c2774d84SAneesh Kumar K.V goto failed_mount4; 2867c2774d84SAneesh Kumar K.V } 2868c2774d84SAneesh Kumar K.V 28693197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 28703197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 28713197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 28723197ebdbSTheodore Ts'o "%s", sb->s_id); 28733197ebdbSTheodore Ts'o if (err) { 28743197ebdbSTheodore Ts'o ext4_mb_release(sb); 28753197ebdbSTheodore Ts'o ext4_ext_release(sb); 28763197ebdbSTheodore Ts'o goto failed_mount4; 28773197ebdbSTheodore Ts'o }; 28783197ebdbSTheodore Ts'o 2879617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2880617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2881617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 28820390131bSFrank Mayhar if (needs_recovery) { 2883b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 2884617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 28850390131bSFrank Mayhar } 28860390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 28870390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 28880390131bSFrank Mayhar descr = " journalled data mode"; 28890390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 28900390131bSFrank Mayhar descr = " ordered data mode"; 28910390131bSFrank Mayhar else 28920390131bSFrank Mayhar descr = " writeback data mode"; 28930390131bSFrank Mayhar } else 28940390131bSFrank Mayhar descr = "out journal"; 28950390131bSFrank Mayhar 2896b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); 2897ac27a0ecSDave Kleikamp 2898ac27a0ecSDave Kleikamp lock_kernel(); 2899ac27a0ecSDave Kleikamp return 0; 2900ac27a0ecSDave Kleikamp 2901617ba13bSMingming Cao cantfind_ext4: 2902ac27a0ecSDave Kleikamp if (!silent) 2903b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 2904ac27a0ecSDave Kleikamp goto failed_mount; 2905ac27a0ecSDave Kleikamp 2906ac27a0ecSDave Kleikamp failed_mount4: 2907b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 29086fd058f7STheodore Ts'o ext4_release_system_zone(sb); 29090390131bSFrank Mayhar if (sbi->s_journal) { 2910dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 291147b4a50bSJan Kara sbi->s_journal = NULL; 29120390131bSFrank Mayhar } 2913ac27a0ecSDave Kleikamp failed_mount3: 2914c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 2915c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 2916c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 2917c5ca7c76STheodore Ts'o else 2918c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 2919c5ca7c76STheodore Ts'o } 2920ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2921ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2922ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 29236bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2924ac27a0ecSDave Kleikamp failed_mount2: 2925ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2926ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2927ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2928ac27a0ecSDave Kleikamp failed_mount: 2929240799cdSTheodore Ts'o if (sbi->s_proc) { 29309f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2931240799cdSTheodore Ts'o } 2932ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2933ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2934ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2935ac27a0ecSDave Kleikamp #endif 2936617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2937ac27a0ecSDave Kleikamp brelse(bh); 2938ac27a0ecSDave Kleikamp out_fail: 2939ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2940f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 2941ac27a0ecSDave Kleikamp kfree(sbi); 2942ac27a0ecSDave Kleikamp lock_kernel(); 29431d1fe1eeSDavid Howells return ret; 2944ac27a0ecSDave Kleikamp } 2945ac27a0ecSDave Kleikamp 2946ac27a0ecSDave Kleikamp /* 2947ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2948ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2949ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2950ac27a0ecSDave Kleikamp */ 2951617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2952ac27a0ecSDave Kleikamp { 2953617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2954ac27a0ecSDave Kleikamp 2955ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 295630773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 295730773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 2958ac27a0ecSDave Kleikamp 2959ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2960ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2961dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2962ac27a0ecSDave Kleikamp else 2963dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 29645bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 29655bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 29665bf5683aSHidehiro Kawai else 29675bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 2968ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2969ac27a0ecSDave Kleikamp } 2970ac27a0ecSDave Kleikamp 2971617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2972ac27a0ecSDave Kleikamp unsigned int journal_inum) 2973ac27a0ecSDave Kleikamp { 2974ac27a0ecSDave Kleikamp struct inode *journal_inode; 2975ac27a0ecSDave Kleikamp journal_t *journal; 2976ac27a0ecSDave Kleikamp 29770390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 29780390131bSFrank Mayhar 2979ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2980ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2981ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2982ac27a0ecSDave Kleikamp 29831d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 29841d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2985b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 2986ac27a0ecSDave Kleikamp return NULL; 2987ac27a0ecSDave Kleikamp } 2988ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2989ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2990ac27a0ecSDave Kleikamp iput(journal_inode); 2991b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 2992ac27a0ecSDave Kleikamp return NULL; 2993ac27a0ecSDave Kleikamp } 2994ac27a0ecSDave Kleikamp 2995e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 2996ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 29971d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2998b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 2999ac27a0ecSDave Kleikamp iput(journal_inode); 3000ac27a0ecSDave Kleikamp return NULL; 3001ac27a0ecSDave Kleikamp } 3002ac27a0ecSDave Kleikamp 3003dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3004ac27a0ecSDave Kleikamp if (!journal) { 3005b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3006ac27a0ecSDave Kleikamp iput(journal_inode); 3007ac27a0ecSDave Kleikamp return NULL; 3008ac27a0ecSDave Kleikamp } 3009ac27a0ecSDave Kleikamp journal->j_private = sb; 3010617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3011ac27a0ecSDave Kleikamp return journal; 3012ac27a0ecSDave Kleikamp } 3013ac27a0ecSDave Kleikamp 3014617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3015ac27a0ecSDave Kleikamp dev_t j_dev) 3016ac27a0ecSDave Kleikamp { 3017ac27a0ecSDave Kleikamp struct buffer_head *bh; 3018ac27a0ecSDave Kleikamp journal_t *journal; 3019617ba13bSMingming Cao ext4_fsblk_t start; 3020617ba13bSMingming Cao ext4_fsblk_t len; 3021ac27a0ecSDave Kleikamp int hblock, blocksize; 3022617ba13bSMingming Cao ext4_fsblk_t sb_block; 3023ac27a0ecSDave Kleikamp unsigned long offset; 3024617ba13bSMingming Cao struct ext4_super_block *es; 3025ac27a0ecSDave Kleikamp struct block_device *bdev; 3026ac27a0ecSDave Kleikamp 30270390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 30280390131bSFrank Mayhar 3029b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3030ac27a0ecSDave Kleikamp if (bdev == NULL) 3031ac27a0ecSDave Kleikamp return NULL; 3032ac27a0ecSDave Kleikamp 3033ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3034b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3035b31e1552SEric Sandeen "failed to claim external journal device"); 30369a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3037ac27a0ecSDave Kleikamp return NULL; 3038ac27a0ecSDave Kleikamp } 3039ac27a0ecSDave Kleikamp 3040ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3041e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3042ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3043b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3044b31e1552SEric Sandeen "blocksize too small for journal device"); 3045ac27a0ecSDave Kleikamp goto out_bdev; 3046ac27a0ecSDave Kleikamp } 3047ac27a0ecSDave Kleikamp 3048617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3049617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3050ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3051ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3052b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3053b31e1552SEric Sandeen "external journal"); 3054ac27a0ecSDave Kleikamp goto out_bdev; 3055ac27a0ecSDave Kleikamp } 3056ac27a0ecSDave Kleikamp 3057617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3058617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3059ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3060617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3061b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3062b31e1552SEric Sandeen "bad superblock"); 3063ac27a0ecSDave Kleikamp brelse(bh); 3064ac27a0ecSDave Kleikamp goto out_bdev; 3065ac27a0ecSDave Kleikamp } 3066ac27a0ecSDave Kleikamp 3067617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3068b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3069ac27a0ecSDave Kleikamp brelse(bh); 3070ac27a0ecSDave Kleikamp goto out_bdev; 3071ac27a0ecSDave Kleikamp } 3072ac27a0ecSDave Kleikamp 3073bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3074ac27a0ecSDave Kleikamp start = sb_block + 1; 3075ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3076ac27a0ecSDave Kleikamp 3077dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3078ac27a0ecSDave Kleikamp start, len, blocksize); 3079ac27a0ecSDave Kleikamp if (!journal) { 3080b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3081ac27a0ecSDave Kleikamp goto out_bdev; 3082ac27a0ecSDave Kleikamp } 3083ac27a0ecSDave Kleikamp journal->j_private = sb; 3084ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3085ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3086ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3087b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3088ac27a0ecSDave Kleikamp goto out_journal; 3089ac27a0ecSDave Kleikamp } 3090ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3091b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3092b31e1552SEric Sandeen "user (unsupported) - %d", 3093ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3094ac27a0ecSDave Kleikamp goto out_journal; 3095ac27a0ecSDave Kleikamp } 3096617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3097617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3098ac27a0ecSDave Kleikamp return journal; 30990b8e58a1SAndreas Dilger 3100ac27a0ecSDave Kleikamp out_journal: 3101dab291afSMingming Cao jbd2_journal_destroy(journal); 3102ac27a0ecSDave Kleikamp out_bdev: 3103617ba13bSMingming Cao ext4_blkdev_put(bdev); 3104ac27a0ecSDave Kleikamp return NULL; 3105ac27a0ecSDave Kleikamp } 3106ac27a0ecSDave Kleikamp 3107617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3108617ba13bSMingming Cao struct ext4_super_block *es, 3109ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3110ac27a0ecSDave Kleikamp { 3111ac27a0ecSDave Kleikamp journal_t *journal; 3112ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3113ac27a0ecSDave Kleikamp dev_t journal_dev; 3114ac27a0ecSDave Kleikamp int err = 0; 3115ac27a0ecSDave Kleikamp int really_read_only; 3116ac27a0ecSDave Kleikamp 31170390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31180390131bSFrank Mayhar 3119ac27a0ecSDave Kleikamp if (journal_devnum && 3120ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3121b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3122b31e1552SEric Sandeen "numbers have changed"); 3123ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3124ac27a0ecSDave Kleikamp } else 3125ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3126ac27a0ecSDave Kleikamp 3127ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3128ac27a0ecSDave Kleikamp 3129ac27a0ecSDave Kleikamp /* 3130ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3131ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3132ac27a0ecSDave Kleikamp * can get read-write access to the device. 3133ac27a0ecSDave Kleikamp */ 3134617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3135ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3136b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3137b31e1552SEric Sandeen "required on readonly filesystem"); 3138ac27a0ecSDave Kleikamp if (really_read_only) { 3139b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3140b31e1552SEric Sandeen "unavailable, cannot proceed"); 3141ac27a0ecSDave Kleikamp return -EROFS; 3142ac27a0ecSDave Kleikamp } 3143b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3144b31e1552SEric Sandeen "be enabled during recovery"); 3145ac27a0ecSDave Kleikamp } 3146ac27a0ecSDave Kleikamp } 3147ac27a0ecSDave Kleikamp 3148ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3149b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3150b31e1552SEric Sandeen "and inode journals!"); 3151ac27a0ecSDave Kleikamp return -EINVAL; 3152ac27a0ecSDave Kleikamp } 3153ac27a0ecSDave Kleikamp 3154ac27a0ecSDave Kleikamp if (journal_inum) { 3155617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3156ac27a0ecSDave Kleikamp return -EINVAL; 3157ac27a0ecSDave Kleikamp } else { 3158617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3159ac27a0ecSDave Kleikamp return -EINVAL; 3160ac27a0ecSDave Kleikamp } 3161ac27a0ecSDave Kleikamp 31624776004fSTheodore Ts'o if (journal->j_flags & JBD2_BARRIER) 3163b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers enabled"); 31644776004fSTheodore Ts'o else 3165b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 31664776004fSTheodore Ts'o 3167ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3168dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3169ac27a0ecSDave Kleikamp if (err) { 3170b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3171dab291afSMingming Cao jbd2_journal_destroy(journal); 3172ac27a0ecSDave Kleikamp return err; 3173ac27a0ecSDave Kleikamp } 3174ac27a0ecSDave Kleikamp } 3175ac27a0ecSDave Kleikamp 3176617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3177dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3178ac27a0ecSDave Kleikamp if (!err) 3179dab291afSMingming Cao err = jbd2_journal_load(journal); 3180ac27a0ecSDave Kleikamp 3181ac27a0ecSDave Kleikamp if (err) { 3182b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3183dab291afSMingming Cao jbd2_journal_destroy(journal); 3184ac27a0ecSDave Kleikamp return err; 3185ac27a0ecSDave Kleikamp } 3186ac27a0ecSDave Kleikamp 3187617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3188617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3189ac27a0ecSDave Kleikamp 3190ac27a0ecSDave Kleikamp if (journal_devnum && 3191ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3192ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3193ac27a0ecSDave Kleikamp 3194ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3195e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3196ac27a0ecSDave Kleikamp } 3197ac27a0ecSDave Kleikamp 3198ac27a0ecSDave Kleikamp return 0; 3199ac27a0ecSDave Kleikamp } 3200ac27a0ecSDave Kleikamp 3201e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3202ac27a0ecSDave Kleikamp { 3203e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3204617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3205c4be0c1dSTakashi Sato int error = 0; 3206ac27a0ecSDave Kleikamp 3207ac27a0ecSDave Kleikamp if (!sbh) 3208c4be0c1dSTakashi Sato return error; 3209914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3210914258bfSTheodore Ts'o /* 3211914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3212914258bfSTheodore Ts'o * superblock failed. This could happen because the 3213914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3214914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3215914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3216914258bfSTheodore Ts'o * write and hope for the best. 3217914258bfSTheodore Ts'o */ 3218b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3219b31e1552SEric Sandeen "superblock detected"); 3220914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3221914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3222914258bfSTheodore Ts'o } 3223ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3224afc32f7eSTheodore Ts'o es->s_kbytes_written = 3225afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3226afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3227afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 32285d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 32295d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 32305d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 32315d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 32327234ab2aSTheodore Ts'o sb->s_dirt = 0; 3233ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3234ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3235914258bfSTheodore Ts'o if (sync) { 3236c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3237c4be0c1dSTakashi Sato if (error) 3238c4be0c1dSTakashi Sato return error; 3239c4be0c1dSTakashi Sato 3240c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3241c4be0c1dSTakashi Sato if (error) { 3242b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3243b31e1552SEric Sandeen "superblock"); 3244914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3245914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3246914258bfSTheodore Ts'o } 3247914258bfSTheodore Ts'o } 3248c4be0c1dSTakashi Sato return error; 3249ac27a0ecSDave Kleikamp } 3250ac27a0ecSDave Kleikamp 3251ac27a0ecSDave Kleikamp /* 3252ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3253ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3254ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3255ac27a0ecSDave Kleikamp */ 3256617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3257617ba13bSMingming Cao struct ext4_super_block *es) 3258ac27a0ecSDave Kleikamp { 3259617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3260ac27a0ecSDave Kleikamp 32610390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 32620390131bSFrank Mayhar BUG_ON(journal != NULL); 32630390131bSFrank Mayhar return; 32640390131bSFrank Mayhar } 3265dab291afSMingming Cao jbd2_journal_lock_updates(journal); 32667ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 32677ffe1ea8SHidehiro Kawai goto out; 32687ffe1ea8SHidehiro Kawai 3269617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3270ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3271617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3272e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3273ac27a0ecSDave Kleikamp } 32747ffe1ea8SHidehiro Kawai 32757ffe1ea8SHidehiro Kawai out: 3276dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3277ac27a0ecSDave Kleikamp } 3278ac27a0ecSDave Kleikamp 3279ac27a0ecSDave Kleikamp /* 3280ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3281ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3282ac27a0ecSDave Kleikamp * main filesystem now. 3283ac27a0ecSDave Kleikamp */ 3284617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3285617ba13bSMingming Cao struct ext4_super_block *es) 3286ac27a0ecSDave Kleikamp { 3287ac27a0ecSDave Kleikamp journal_t *journal; 3288ac27a0ecSDave Kleikamp int j_errno; 3289ac27a0ecSDave Kleikamp const char *errstr; 3290ac27a0ecSDave Kleikamp 32910390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32920390131bSFrank Mayhar 3293617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3294ac27a0ecSDave Kleikamp 3295ac27a0ecSDave Kleikamp /* 3296ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3297617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3298ac27a0ecSDave Kleikamp */ 3299ac27a0ecSDave Kleikamp 3300dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3301ac27a0ecSDave Kleikamp if (j_errno) { 3302ac27a0ecSDave Kleikamp char nbuf[16]; 3303ac27a0ecSDave Kleikamp 3304617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 330546e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 3306ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 330746e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 3308ac27a0ecSDave Kleikamp "filesystem check."); 3309ac27a0ecSDave Kleikamp 3310617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3311617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3312e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3313ac27a0ecSDave Kleikamp 3314dab291afSMingming Cao jbd2_journal_clear_err(journal); 3315ac27a0ecSDave Kleikamp } 3316ac27a0ecSDave Kleikamp } 3317ac27a0ecSDave Kleikamp 3318ac27a0ecSDave Kleikamp /* 3319ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3320ac27a0ecSDave Kleikamp * and wait on the commit. 3321ac27a0ecSDave Kleikamp */ 3322617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3323ac27a0ecSDave Kleikamp { 3324ac27a0ecSDave Kleikamp journal_t *journal; 33250390131bSFrank Mayhar int ret = 0; 3326ac27a0ecSDave Kleikamp 3327ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3328ac27a0ecSDave Kleikamp return 0; 3329ac27a0ecSDave Kleikamp 3330617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 33317234ab2aSTheodore Ts'o if (journal) 3332617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 33330390131bSFrank Mayhar 3334ac27a0ecSDave Kleikamp return ret; 3335ac27a0ecSDave Kleikamp } 3336ac27a0ecSDave Kleikamp 3337617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3338ac27a0ecSDave Kleikamp { 3339ebc1ac16SChristoph Hellwig lock_super(sb); 3340e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3341ebc1ac16SChristoph Hellwig unlock_super(sb); 33420390131bSFrank Mayhar } 3343ac27a0ecSDave Kleikamp 3344617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3345ac27a0ecSDave Kleikamp { 334614ce0cb4STheodore Ts'o int ret = 0; 33479eddacf9SJan Kara tid_t target; 3348ac27a0ecSDave Kleikamp 3349ede86cc4STheodore Ts'o trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); 33509ca92389STheodore Ts'o if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { 3351ac27a0ecSDave Kleikamp if (wait) 33529ca92389STheodore Ts'o jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); 33530390131bSFrank Mayhar } 335414ce0cb4STheodore Ts'o return ret; 3355ac27a0ecSDave Kleikamp } 3356ac27a0ecSDave Kleikamp 3357ac27a0ecSDave Kleikamp /* 3358ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3359ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3360ac27a0ecSDave Kleikamp */ 3361c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3362ac27a0ecSDave Kleikamp { 3363c4be0c1dSTakashi Sato int error = 0; 3364c4be0c1dSTakashi Sato journal_t *journal; 3365ac27a0ecSDave Kleikamp 33669ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 33679ca92389STheodore Ts'o return 0; 33689ca92389STheodore Ts'o 3369c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3370ac27a0ecSDave Kleikamp 3371ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3372dab291afSMingming Cao jbd2_journal_lock_updates(journal); 33737ffe1ea8SHidehiro Kawai 33747ffe1ea8SHidehiro Kawai /* 33759ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 33769ca92389STheodore Ts'o * the journal. 33777ffe1ea8SHidehiro Kawai */ 3378c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 33799ca92389STheodore Ts'o if (error < 0) { 33809ca92389STheodore Ts'o out: 33819ca92389STheodore Ts'o jbd2_journal_unlock_updates(journal); 33829ca92389STheodore Ts'o return error; 33830390131bSFrank Mayhar } 3384ac27a0ecSDave Kleikamp 3385ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3386617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3387e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 3388c4be0c1dSTakashi Sato if (error) 3389c4be0c1dSTakashi Sato goto out; 3390c4be0c1dSTakashi Sato return 0; 3391ac27a0ecSDave Kleikamp } 3392ac27a0ecSDave Kleikamp 3393ac27a0ecSDave Kleikamp /* 3394ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3395ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3396ac27a0ecSDave Kleikamp */ 3397c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3398ac27a0ecSDave Kleikamp { 33999ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 34009ca92389STheodore Ts'o return 0; 34019ca92389STheodore Ts'o 3402ac27a0ecSDave Kleikamp lock_super(sb); 34039ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3404617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3405e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3406ac27a0ecSDave Kleikamp unlock_super(sb); 3407dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3408c4be0c1dSTakashi Sato return 0; 3409ac27a0ecSDave Kleikamp } 3410ac27a0ecSDave Kleikamp 3411617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3412ac27a0ecSDave Kleikamp { 3413617ba13bSMingming Cao struct ext4_super_block *es; 3414617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3415617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3416ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3417617ba13bSMingming Cao struct ext4_mount_options old_opts; 34188a266467STheodore Ts'o ext4_group_t g; 3419b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3420ac27a0ecSDave Kleikamp int err; 3421ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3422ac27a0ecSDave Kleikamp int i; 3423ac27a0ecSDave Kleikamp #endif 3424ac27a0ecSDave Kleikamp 3425337eb00aSAlessio Igor Bogani lock_kernel(); 3426337eb00aSAlessio Igor Bogani 3427ac27a0ecSDave Kleikamp /* Store the original options */ 3428bbd6851aSAl Viro lock_super(sb); 3429ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3430ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3431ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3432ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3433ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 343430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 343530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3436ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3437ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3438ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3439ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3440ac27a0ecSDave Kleikamp #endif 3441b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3442b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3443ac27a0ecSDave Kleikamp 3444ac27a0ecSDave Kleikamp /* 3445ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3446ac27a0ecSDave Kleikamp */ 3447b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3448b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3449ac27a0ecSDave Kleikamp err = -EINVAL; 3450ac27a0ecSDave Kleikamp goto restore_opts; 3451ac27a0ecSDave Kleikamp } 3452ac27a0ecSDave Kleikamp 3453617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 345446e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3455ac27a0ecSDave Kleikamp 3456ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3457617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3458ac27a0ecSDave Kleikamp 3459ac27a0ecSDave Kleikamp es = sbi->s_es; 3460ac27a0ecSDave Kleikamp 3461b3881f74STheodore Ts'o if (sbi->s_journal) { 3462617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3463b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3464b3881f74STheodore Ts'o } 3465ac27a0ecSDave Kleikamp 3466ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3467bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 3468617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 3469ac27a0ecSDave Kleikamp err = -EROFS; 3470ac27a0ecSDave Kleikamp goto restore_opts; 3471ac27a0ecSDave Kleikamp } 3472ac27a0ecSDave Kleikamp 3473ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3474ac27a0ecSDave Kleikamp /* 3475ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3476ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3477ac27a0ecSDave Kleikamp */ 3478ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3479ac27a0ecSDave Kleikamp 3480ac27a0ecSDave Kleikamp /* 3481ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3482ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3483ac27a0ecSDave Kleikamp * mark the partition as valid again. 3484ac27a0ecSDave Kleikamp */ 3485617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3486617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3487ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3488ac27a0ecSDave Kleikamp 3489a63c9eb2STheodore Ts'o if (sbi->s_journal) 3490617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3491ac27a0ecSDave Kleikamp } else { 34923a06d778SAneesh Kumar K.V int ret; 3493617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3494617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 3495b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "couldn't " 3496ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 3497b31e1552SEric Sandeen "optional features (%x)", 34983a06d778SAneesh Kumar K.V (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & 34993a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3500ac27a0ecSDave Kleikamp err = -EROFS; 3501ac27a0ecSDave Kleikamp goto restore_opts; 3502ac27a0ecSDave Kleikamp } 3503ead6596bSEric Sandeen 3504ead6596bSEric Sandeen /* 35058a266467STheodore Ts'o * Make sure the group descriptor checksums 35060b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 35078a266467STheodore Ts'o */ 35088a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 35098a266467STheodore Ts'o struct ext4_group_desc *gdp = 35108a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 35118a266467STheodore Ts'o 35128a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3513b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3514b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 35158a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 35168a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 35178a266467STheodore Ts'o err = -EINVAL; 35188a266467STheodore Ts'o goto restore_opts; 35198a266467STheodore Ts'o } 35208a266467STheodore Ts'o } 35218a266467STheodore Ts'o 35228a266467STheodore Ts'o /* 3523ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3524ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3525ead6596bSEric Sandeen * require a full umount/remount for now. 3526ead6596bSEric Sandeen */ 3527ead6596bSEric Sandeen if (es->s_last_orphan) { 3528b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3529ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3530ead6596bSEric Sandeen "orphan inode list. Please " 3531b31e1552SEric Sandeen "umount/remount instead"); 3532ead6596bSEric Sandeen err = -EINVAL; 3533ead6596bSEric Sandeen goto restore_opts; 3534ead6596bSEric Sandeen } 3535ead6596bSEric Sandeen 3536ac27a0ecSDave Kleikamp /* 3537ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3538ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3539ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3540ac27a0ecSDave Kleikamp * the partition.) 3541ac27a0ecSDave Kleikamp */ 35420390131bSFrank Mayhar if (sbi->s_journal) 3543617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3544ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3545617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3546ac27a0ecSDave Kleikamp goto restore_opts; 3547617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3548ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3549ac27a0ecSDave Kleikamp } 3550ac27a0ecSDave Kleikamp } 35516fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 35520390131bSFrank Mayhar if (sbi->s_journal == NULL) 3553e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 35540390131bSFrank Mayhar 3555ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3556ac27a0ecSDave Kleikamp /* Release old quota file names */ 3557ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3558ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3559ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3560ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3561ac27a0ecSDave Kleikamp #endif 3562bbd6851aSAl Viro unlock_super(sb); 3563337eb00aSAlessio Igor Bogani unlock_kernel(); 3564ac27a0ecSDave Kleikamp return 0; 35650b8e58a1SAndreas Dilger 3566ac27a0ecSDave Kleikamp restore_opts: 3567ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3568ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3569ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3570ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3571ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 357230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 357330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3574ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3575ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3576ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3577ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3578ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3579ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3580ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3581ac27a0ecSDave Kleikamp } 3582ac27a0ecSDave Kleikamp #endif 3583bbd6851aSAl Viro unlock_super(sb); 3584337eb00aSAlessio Igor Bogani unlock_kernel(); 3585ac27a0ecSDave Kleikamp return err; 3586ac27a0ecSDave Kleikamp } 3587ac27a0ecSDave Kleikamp 3588617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3589ac27a0ecSDave Kleikamp { 3590ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3591617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3592617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3593960cc398SPekka Enberg u64 fsid; 3594ac27a0ecSDave Kleikamp 35955e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 35965e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 35976bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 35988df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 35995e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3600ac27a0ecSDave Kleikamp 3601ac27a0ecSDave Kleikamp /* 36025e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 36035e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 36045e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3605ac27a0ecSDave Kleikamp */ 3606ac27a0ecSDave Kleikamp 3607ac27a0ecSDave Kleikamp /* 3608ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3609ac27a0ecSDave Kleikamp * overhead 3610ac27a0ecSDave Kleikamp */ 3611ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3612ac27a0ecSDave Kleikamp 3613ac27a0ecSDave Kleikamp /* 3614ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3615ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3616ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3617ac27a0ecSDave Kleikamp */ 3618ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3619617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3620617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3621ac27a0ecSDave Kleikamp cond_resched(); 3622ac27a0ecSDave Kleikamp } 3623ac27a0ecSDave Kleikamp 3624ac27a0ecSDave Kleikamp /* 3625ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3626ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3627ac27a0ecSDave Kleikamp */ 36285e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 36295e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 36305e70030dSBadari Pulavarty smp_wmb(); 36316bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3632ac27a0ecSDave Kleikamp } 3633ac27a0ecSDave Kleikamp 3634617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3635ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 36365e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 36376bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 36386bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3639308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3640bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3641bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3642ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3643ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 364452d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 36455e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3646617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3647960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3648960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3649960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3650960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 36510b8e58a1SAndreas Dilger 3652ac27a0ecSDave Kleikamp return 0; 3653ac27a0ecSDave Kleikamp } 3654ac27a0ecSDave Kleikamp 36550b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 36560b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3657ac27a0ecSDave Kleikamp * Process 1 Process 2 3658617ba13bSMingming Cao * ext4_create() quota_sync() 3659dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3660a269eb18SJan Kara * vfs_dq_init() down(dqio_mutex) 3661dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3662ac27a0ecSDave Kleikamp * 3663ac27a0ecSDave Kleikamp */ 3664ac27a0ecSDave Kleikamp 3665ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3666ac27a0ecSDave Kleikamp 3667ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3668ac27a0ecSDave Kleikamp { 3669ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3670ac27a0ecSDave Kleikamp } 3671ac27a0ecSDave Kleikamp 3672617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3673ac27a0ecSDave Kleikamp { 3674ac27a0ecSDave Kleikamp int ret, err; 3675ac27a0ecSDave Kleikamp handle_t *handle; 3676ac27a0ecSDave Kleikamp struct inode *inode; 3677ac27a0ecSDave Kleikamp 3678ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3679617ba13bSMingming Cao handle = ext4_journal_start(inode, 3680617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3681ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3682ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3683ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3684617ba13bSMingming Cao err = ext4_journal_stop(handle); 3685ac27a0ecSDave Kleikamp if (!ret) 3686ac27a0ecSDave Kleikamp ret = err; 3687ac27a0ecSDave Kleikamp return ret; 3688ac27a0ecSDave Kleikamp } 3689ac27a0ecSDave Kleikamp 3690617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3691ac27a0ecSDave Kleikamp { 3692ac27a0ecSDave Kleikamp int ret, err; 3693ac27a0ecSDave Kleikamp handle_t *handle; 3694ac27a0ecSDave Kleikamp 3695617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3696617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3697ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3698ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3699ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3700617ba13bSMingming Cao err = ext4_journal_stop(handle); 3701ac27a0ecSDave Kleikamp if (!ret) 3702ac27a0ecSDave Kleikamp ret = err; 3703ac27a0ecSDave Kleikamp return ret; 3704ac27a0ecSDave Kleikamp } 3705ac27a0ecSDave Kleikamp 3706617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3707ac27a0ecSDave Kleikamp { 3708ac27a0ecSDave Kleikamp int ret, err; 3709ac27a0ecSDave Kleikamp handle_t *handle; 3710ac27a0ecSDave Kleikamp 3711617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3712617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 37139c3013e9SJan Kara if (IS_ERR(handle)) { 37149c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 37159c3013e9SJan Kara dquot_release(dquot); 3716ac27a0ecSDave Kleikamp return PTR_ERR(handle); 37179c3013e9SJan Kara } 3718ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3719617ba13bSMingming Cao err = ext4_journal_stop(handle); 3720ac27a0ecSDave Kleikamp if (!ret) 3721ac27a0ecSDave Kleikamp ret = err; 3722ac27a0ecSDave Kleikamp return ret; 3723ac27a0ecSDave Kleikamp } 3724ac27a0ecSDave Kleikamp 3725617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3726ac27a0ecSDave Kleikamp { 37272c8be6b2SJan Kara /* Are we journaling quotas? */ 3728617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3729617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3730ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3731617ba13bSMingming Cao return ext4_write_dquot(dquot); 3732ac27a0ecSDave Kleikamp } else { 3733ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3734ac27a0ecSDave Kleikamp } 3735ac27a0ecSDave Kleikamp } 3736ac27a0ecSDave Kleikamp 3737617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3738ac27a0ecSDave Kleikamp { 3739ac27a0ecSDave Kleikamp int ret, err; 3740ac27a0ecSDave Kleikamp handle_t *handle; 3741ac27a0ecSDave Kleikamp 3742ac27a0ecSDave Kleikamp /* Data block + inode block */ 3743617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3744ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3745ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3746ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3747617ba13bSMingming Cao err = ext4_journal_stop(handle); 3748ac27a0ecSDave Kleikamp if (!ret) 3749ac27a0ecSDave Kleikamp ret = err; 3750ac27a0ecSDave Kleikamp return ret; 3751ac27a0ecSDave Kleikamp } 3752ac27a0ecSDave Kleikamp 3753ac27a0ecSDave Kleikamp /* 3754ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3755ac27a0ecSDave Kleikamp * the quota file and such... 3756ac27a0ecSDave Kleikamp */ 3757617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3758ac27a0ecSDave Kleikamp { 3759617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3760617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3761ac27a0ecSDave Kleikamp } 3762ac27a0ecSDave Kleikamp 3763ac27a0ecSDave Kleikamp /* 3764ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3765ac27a0ecSDave Kleikamp */ 3766617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 37678264613dSAl Viro char *name, int remount) 3768ac27a0ecSDave Kleikamp { 3769ac27a0ecSDave Kleikamp int err; 37708264613dSAl Viro struct path path; 3771ac27a0ecSDave Kleikamp 3772ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3773ac27a0ecSDave Kleikamp return -EINVAL; 37748264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 37750623543bSJan Kara if (remount) 37768264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 37770623543bSJan Kara 37788264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3779ac27a0ecSDave Kleikamp if (err) 3780ac27a0ecSDave Kleikamp return err; 37810623543bSJan Kara 3782ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 37838264613dSAl Viro if (path.mnt->mnt_sb != sb) { 37848264613dSAl Viro path_put(&path); 3785ac27a0ecSDave Kleikamp return -EXDEV; 3786ac27a0ecSDave Kleikamp } 37870623543bSJan Kara /* Journaling quota? */ 37880623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 37892b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 37908264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3791b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3792b31e1552SEric Sandeen "Quota file not on filesystem root. " 3793b31e1552SEric Sandeen "Journaled quota will not work"); 37940623543bSJan Kara } 37950623543bSJan Kara 37960623543bSJan Kara /* 37970623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 37980623543bSJan Kara * all updates to the file when we bypass pagecache... 37990623543bSJan Kara */ 38000390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 38010390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 38020623543bSJan Kara /* 38030623543bSJan Kara * We don't need to lock updates but journal_flush() could 38040623543bSJan Kara * otherwise be livelocked... 38050623543bSJan Kara */ 38060623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 38077ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 38080623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 38097ffe1ea8SHidehiro Kawai if (err) { 38108264613dSAl Viro path_put(&path); 38117ffe1ea8SHidehiro Kawai return err; 38127ffe1ea8SHidehiro Kawai } 38130623543bSJan Kara } 38140623543bSJan Kara 38158264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 38168264613dSAl Viro path_put(&path); 381777e69dacSAl Viro return err; 3818ac27a0ecSDave Kleikamp } 3819ac27a0ecSDave Kleikamp 3820ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3821ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3822ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3823ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3824617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3825ac27a0ecSDave Kleikamp size_t len, loff_t off) 3826ac27a0ecSDave Kleikamp { 3827ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3828725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3829ac27a0ecSDave Kleikamp int err = 0; 3830ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3831ac27a0ecSDave Kleikamp int tocopy; 3832ac27a0ecSDave Kleikamp size_t toread; 3833ac27a0ecSDave Kleikamp struct buffer_head *bh; 3834ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3835ac27a0ecSDave Kleikamp 3836ac27a0ecSDave Kleikamp if (off > i_size) 3837ac27a0ecSDave Kleikamp return 0; 3838ac27a0ecSDave Kleikamp if (off+len > i_size) 3839ac27a0ecSDave Kleikamp len = i_size-off; 3840ac27a0ecSDave Kleikamp toread = len; 3841ac27a0ecSDave Kleikamp while (toread > 0) { 3842ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3843ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3844617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3845ac27a0ecSDave Kleikamp if (err) 3846ac27a0ecSDave Kleikamp return err; 3847ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3848ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3849ac27a0ecSDave Kleikamp else 3850ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3851ac27a0ecSDave Kleikamp brelse(bh); 3852ac27a0ecSDave Kleikamp offset = 0; 3853ac27a0ecSDave Kleikamp toread -= tocopy; 3854ac27a0ecSDave Kleikamp data += tocopy; 3855ac27a0ecSDave Kleikamp blk++; 3856ac27a0ecSDave Kleikamp } 3857ac27a0ecSDave Kleikamp return len; 3858ac27a0ecSDave Kleikamp } 3859ac27a0ecSDave Kleikamp 3860ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3861ac27a0ecSDave Kleikamp * enough credits) */ 3862617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3863ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3864ac27a0ecSDave Kleikamp { 3865ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3866725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3867ac27a0ecSDave Kleikamp int err = 0; 3868ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3869ac27a0ecSDave Kleikamp int tocopy; 3870617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3871ac27a0ecSDave Kleikamp size_t towrite = len; 3872ac27a0ecSDave Kleikamp struct buffer_head *bh; 3873ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3874ac27a0ecSDave Kleikamp 38750390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3876b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 3877b31e1552SEric Sandeen " cancelled because transaction is not started", 38789c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 38799c3013e9SJan Kara return -EIO; 38809c3013e9SJan Kara } 3881ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3882ac27a0ecSDave Kleikamp while (towrite > 0) { 3883ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3884ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3885617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3886ac27a0ecSDave Kleikamp if (!bh) 3887ac27a0ecSDave Kleikamp goto out; 3888ac27a0ecSDave Kleikamp if (journal_quota) { 3889617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3890ac27a0ecSDave Kleikamp if (err) { 3891ac27a0ecSDave Kleikamp brelse(bh); 3892ac27a0ecSDave Kleikamp goto out; 3893ac27a0ecSDave Kleikamp } 3894ac27a0ecSDave Kleikamp } 3895ac27a0ecSDave Kleikamp lock_buffer(bh); 3896ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3897ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3898ac27a0ecSDave Kleikamp unlock_buffer(bh); 3899ac27a0ecSDave Kleikamp if (journal_quota) 39000390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 3901ac27a0ecSDave Kleikamp else { 3902ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3903678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3904ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3905ac27a0ecSDave Kleikamp } 3906ac27a0ecSDave Kleikamp brelse(bh); 3907ac27a0ecSDave Kleikamp if (err) 3908ac27a0ecSDave Kleikamp goto out; 3909ac27a0ecSDave Kleikamp offset = 0; 3910ac27a0ecSDave Kleikamp towrite -= tocopy; 3911ac27a0ecSDave Kleikamp data += tocopy; 3912ac27a0ecSDave Kleikamp blk++; 3913ac27a0ecSDave Kleikamp } 3914ac27a0ecSDave Kleikamp out: 39154d04e4fbSJan Kara if (len == towrite) { 39164d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3917ac27a0ecSDave Kleikamp return err; 39184d04e4fbSJan Kara } 3919ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3920ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3921617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3922ac27a0ecSDave Kleikamp } 3923ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3924617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3925ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3926ac27a0ecSDave Kleikamp return len - towrite; 3927ac27a0ecSDave Kleikamp } 3928ac27a0ecSDave Kleikamp 3929ac27a0ecSDave Kleikamp #endif 3930ac27a0ecSDave Kleikamp 39310b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 39320b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 3933ac27a0ecSDave Kleikamp { 3934617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 3935ac27a0ecSDave Kleikamp } 3936ac27a0ecSDave Kleikamp 393703010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 3938ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 393903010a33STheodore Ts'o .name = "ext4", 3940617ba13bSMingming Cao .get_sb = ext4_get_sb, 3941ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3942ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3943ac27a0ecSDave Kleikamp }; 3944ac27a0ecSDave Kleikamp 394503010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 39460b8e58a1SAndreas Dilger static int ext4dev_get_sb(struct file_system_type *fs_type, int flags, 39470b8e58a1SAndreas Dilger const char *dev_name, void *data,struct vfsmount *mnt) 394803010a33STheodore Ts'o { 3949b31e1552SEric Sandeen printk(KERN_WARNING "EXT4-fs (%s): Update your userspace programs " 3950b31e1552SEric Sandeen "to mount using ext4\n", dev_name); 3951b31e1552SEric Sandeen printk(KERN_WARNING "EXT4-fs (%s): ext4dev backwards compatibility " 3952b31e1552SEric Sandeen "will go away by 2.6.31\n", dev_name); 395303010a33STheodore Ts'o return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 395403010a33STheodore Ts'o } 395503010a33STheodore Ts'o 395603010a33STheodore Ts'o static struct file_system_type ext4dev_fs_type = { 395703010a33STheodore Ts'o .owner = THIS_MODULE, 395803010a33STheodore Ts'o .name = "ext4dev", 395903010a33STheodore Ts'o .get_sb = ext4dev_get_sb, 396003010a33STheodore Ts'o .kill_sb = kill_block_super, 396103010a33STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 396203010a33STheodore Ts'o }; 396303010a33STheodore Ts'o MODULE_ALIAS("ext4dev"); 396403010a33STheodore Ts'o #endif 396503010a33STheodore Ts'o 3966617ba13bSMingming Cao static int __init init_ext4_fs(void) 3967ac27a0ecSDave Kleikamp { 3968c9de560dSAlex Tomas int err; 3969c9de560dSAlex Tomas 39706fd058f7STheodore Ts'o err = init_ext4_system_zone(); 39716fd058f7STheodore Ts'o if (err) 39726fd058f7STheodore Ts'o return err; 39733197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 39743197ebdbSTheodore Ts'o if (!ext4_kset) 39756fd058f7STheodore Ts'o goto out4; 39769f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 3977c9de560dSAlex Tomas err = init_ext4_mballoc(); 3978ac27a0ecSDave Kleikamp if (err) 39796fd058f7STheodore Ts'o goto out3; 3980c9de560dSAlex Tomas 3981c9de560dSAlex Tomas err = init_ext4_xattr(); 3982c9de560dSAlex Tomas if (err) 3983c9de560dSAlex Tomas goto out2; 3984ac27a0ecSDave Kleikamp err = init_inodecache(); 3985ac27a0ecSDave Kleikamp if (err) 3986ac27a0ecSDave Kleikamp goto out1; 398703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 3988ac27a0ecSDave Kleikamp if (err) 3989ac27a0ecSDave Kleikamp goto out; 399003010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 399103010a33STheodore Ts'o err = register_filesystem(&ext4dev_fs_type); 399203010a33STheodore Ts'o if (err) { 399303010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 399403010a33STheodore Ts'o goto out; 399503010a33STheodore Ts'o } 399603010a33STheodore Ts'o #endif 3997ac27a0ecSDave Kleikamp return 0; 3998ac27a0ecSDave Kleikamp out: 3999ac27a0ecSDave Kleikamp destroy_inodecache(); 4000ac27a0ecSDave Kleikamp out1: 4001617ba13bSMingming Cao exit_ext4_xattr(); 4002c9de560dSAlex Tomas out2: 4003c9de560dSAlex Tomas exit_ext4_mballoc(); 40046fd058f7STheodore Ts'o out3: 40056fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 40066fd058f7STheodore Ts'o kset_unregister(ext4_kset); 40076fd058f7STheodore Ts'o out4: 40086fd058f7STheodore Ts'o exit_ext4_system_zone(); 4009ac27a0ecSDave Kleikamp return err; 4010ac27a0ecSDave Kleikamp } 4011ac27a0ecSDave Kleikamp 4012617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4013ac27a0ecSDave Kleikamp { 401403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 401503010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 4016617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 401703010a33STheodore Ts'o #endif 4018ac27a0ecSDave Kleikamp destroy_inodecache(); 4019617ba13bSMingming Cao exit_ext4_xattr(); 4020c9de560dSAlex Tomas exit_ext4_mballoc(); 40219f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 40223197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 40236fd058f7STheodore Ts'o exit_ext4_system_zone(); 4024ac27a0ecSDave Kleikamp } 4025ac27a0ecSDave Kleikamp 4026ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 402783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4028ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4029617ba13bSMingming Cao module_init(init_ext4_fs) 4030617ba13bSMingming Cao module_exit(exit_ext4_fs) 4031