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> 23dab291afSMingming Cao #include <linux/jbd2.h> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 27ac27a0ecSDave Kleikamp #include <linux/parser.h> 28ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 38ede86cc4STheodore Ts'o #include <linux/marker.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 433dcf5451SChristoph Hellwig #include "ext4.h" 443dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 45ac27a0ecSDave Kleikamp #include "xattr.h" 46ac27a0ecSDave Kleikamp #include "acl.h" 47ac27a0ecSDave Kleikamp #include "namei.h" 48717d50e4SAndreas Dilger #include "group.h" 49ac27a0ecSDave Kleikamp 509f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 519f6200bbSTheodore Ts'o 52617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 53ac27a0ecSDave Kleikamp unsigned long journal_devnum); 54617ba13bSMingming Cao static int ext4_create_journal(struct super_block *, struct ext4_super_block *, 55ac27a0ecSDave Kleikamp unsigned int); 56617ba13bSMingming Cao static void ext4_commit_super(struct super_block *sb, 572b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync); 58617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 59617ba13bSMingming Cao struct ext4_super_block *es); 60617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 61617ba13bSMingming Cao struct ext4_super_block *es); 62617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 63617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 64ac27a0ecSDave Kleikamp char nbuf[16]); 65617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 66617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 67617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb); 68617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 69617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb); 70ac27a0ecSDave Kleikamp 71bd81d8eeSLaurent Vivier 728fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 738fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 74bd81d8eeSLaurent Vivier { 753a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 768fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 778fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 78bd81d8eeSLaurent Vivier } 79bd81d8eeSLaurent Vivier 808fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 818fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 82bd81d8eeSLaurent Vivier { 835272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 848fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 858fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 86bd81d8eeSLaurent Vivier } 87bd81d8eeSLaurent Vivier 888fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 898fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 90bd81d8eeSLaurent Vivier { 915272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 928fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 938fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 94bd81d8eeSLaurent Vivier } 95bd81d8eeSLaurent Vivier 968fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 978fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 98bd81d8eeSLaurent Vivier { 993a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1008fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1018fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 102bd81d8eeSLaurent Vivier } 103bd81d8eeSLaurent Vivier 1048fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1058fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 106bd81d8eeSLaurent Vivier { 1075272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1088fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1098fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 110bd81d8eeSLaurent Vivier } 111bd81d8eeSLaurent Vivier 1128fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1138fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 114bd81d8eeSLaurent Vivier { 1155272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1168fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1178fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 118bd81d8eeSLaurent Vivier } 119bd81d8eeSLaurent Vivier 120ac27a0ecSDave Kleikamp /* 121dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 122ac27a0ecSDave Kleikamp * 123ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 124ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 125ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 126ac27a0ecSDave Kleikamp * appropriate. 127ac27a0ecSDave Kleikamp */ 128617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 129ac27a0ecSDave Kleikamp { 130ac27a0ecSDave Kleikamp journal_t *journal; 131ac27a0ecSDave Kleikamp 132ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 133ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 134ac27a0ecSDave Kleikamp 135ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 136ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 137ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 138617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 1390390131bSFrank Mayhar if (journal) { 140ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 14146e665e9SHarvey Harrison ext4_abort(sb, __func__, 142ac27a0ecSDave Kleikamp "Detected aborted journal"); 143ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 144ac27a0ecSDave Kleikamp } 145dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 146ac27a0ecSDave Kleikamp } 1470390131bSFrank Mayhar /* 1480390131bSFrank Mayhar * We're not journaling, return the appropriate indication. 1490390131bSFrank Mayhar */ 1500390131bSFrank Mayhar current->journal_info = EXT4_NOJOURNAL_HANDLE; 1510390131bSFrank Mayhar return current->journal_info; 1520390131bSFrank Mayhar } 153ac27a0ecSDave Kleikamp 154ac27a0ecSDave Kleikamp /* 155ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 156dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 157ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 158ac27a0ecSDave Kleikamp * appropriate. 159ac27a0ecSDave Kleikamp */ 160617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 161ac27a0ecSDave Kleikamp { 162ac27a0ecSDave Kleikamp struct super_block *sb; 163ac27a0ecSDave Kleikamp int err; 164ac27a0ecSDave Kleikamp int rc; 165ac27a0ecSDave Kleikamp 1660390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 1670390131bSFrank Mayhar /* 1680390131bSFrank Mayhar * Do this here since we don't call jbd2_journal_stop() in 1690390131bSFrank Mayhar * no-journal mode. 1700390131bSFrank Mayhar */ 1710390131bSFrank Mayhar current->journal_info = NULL; 1720390131bSFrank Mayhar return 0; 1730390131bSFrank Mayhar } 174ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 175ac27a0ecSDave Kleikamp err = handle->h_err; 176dab291afSMingming Cao rc = jbd2_journal_stop(handle); 177ac27a0ecSDave Kleikamp 178ac27a0ecSDave Kleikamp if (!err) 179ac27a0ecSDave Kleikamp err = rc; 180ac27a0ecSDave Kleikamp if (err) 181617ba13bSMingming Cao __ext4_std_error(sb, where, err); 182ac27a0ecSDave Kleikamp return err; 183ac27a0ecSDave Kleikamp } 184ac27a0ecSDave Kleikamp 185617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 186ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 187ac27a0ecSDave Kleikamp { 188ac27a0ecSDave Kleikamp char nbuf[16]; 189617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 190ac27a0ecSDave Kleikamp 1910390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 1920390131bSFrank Mayhar 193ac27a0ecSDave Kleikamp if (bh) 194ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 195ac27a0ecSDave Kleikamp 196ac27a0ecSDave Kleikamp if (!handle->h_err) 197ac27a0ecSDave Kleikamp handle->h_err = err; 198ac27a0ecSDave Kleikamp 199ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 200ac27a0ecSDave Kleikamp return; 201ac27a0ecSDave Kleikamp 202ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 203ac27a0ecSDave Kleikamp caller, errstr, err_fn); 204ac27a0ecSDave Kleikamp 205dab291afSMingming Cao jbd2_journal_abort_handle(handle); 206ac27a0ecSDave Kleikamp } 207ac27a0ecSDave Kleikamp 208ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 209ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 210ac27a0ecSDave Kleikamp * 211ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 212617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 213ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 214ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 215ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 216ac27a0ecSDave Kleikamp * write out the superblock safely. 217ac27a0ecSDave Kleikamp * 218dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 219ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 220ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 221ac27a0ecSDave Kleikamp */ 222ac27a0ecSDave Kleikamp 223617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 224ac27a0ecSDave Kleikamp { 225617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 226ac27a0ecSDave Kleikamp 227617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 228617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 229ac27a0ecSDave Kleikamp 230ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 231ac27a0ecSDave Kleikamp return; 232ac27a0ecSDave Kleikamp 233ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 234617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 235ac27a0ecSDave Kleikamp 236617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 237ac27a0ecSDave Kleikamp if (journal) 238dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 239ac27a0ecSDave Kleikamp } 240ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 241ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 242ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 243ac27a0ecSDave Kleikamp } 244617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 245ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 246617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 247ac27a0ecSDave Kleikamp sb->s_id); 248ac27a0ecSDave Kleikamp } 249ac27a0ecSDave Kleikamp 250617ba13bSMingming Cao void ext4_error(struct super_block *sb, const char *function, 251ac27a0ecSDave Kleikamp const char *fmt, ...) 252ac27a0ecSDave Kleikamp { 253ac27a0ecSDave Kleikamp va_list args; 254ac27a0ecSDave Kleikamp 255ac27a0ecSDave Kleikamp va_start(args, fmt); 256617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 257ac27a0ecSDave Kleikamp vprintk(fmt, args); 258ac27a0ecSDave Kleikamp printk("\n"); 259ac27a0ecSDave Kleikamp va_end(args); 260ac27a0ecSDave Kleikamp 261617ba13bSMingming Cao ext4_handle_error(sb); 262ac27a0ecSDave Kleikamp } 263ac27a0ecSDave Kleikamp 264617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 265ac27a0ecSDave Kleikamp char nbuf[16]) 266ac27a0ecSDave Kleikamp { 267ac27a0ecSDave Kleikamp char *errstr = NULL; 268ac27a0ecSDave Kleikamp 269ac27a0ecSDave Kleikamp switch (errno) { 270ac27a0ecSDave Kleikamp case -EIO: 271ac27a0ecSDave Kleikamp errstr = "IO failure"; 272ac27a0ecSDave Kleikamp break; 273ac27a0ecSDave Kleikamp case -ENOMEM: 274ac27a0ecSDave Kleikamp errstr = "Out of memory"; 275ac27a0ecSDave Kleikamp break; 276ac27a0ecSDave Kleikamp case -EROFS: 277dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 278ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 279ac27a0ecSDave Kleikamp else 280ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 281ac27a0ecSDave Kleikamp break; 282ac27a0ecSDave Kleikamp default: 283ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 284ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 285ac27a0ecSDave Kleikamp * NULL. */ 286ac27a0ecSDave Kleikamp if (nbuf) { 287ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 288ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 289ac27a0ecSDave Kleikamp errstr = nbuf; 290ac27a0ecSDave Kleikamp } 291ac27a0ecSDave Kleikamp break; 292ac27a0ecSDave Kleikamp } 293ac27a0ecSDave Kleikamp 294ac27a0ecSDave Kleikamp return errstr; 295ac27a0ecSDave Kleikamp } 296ac27a0ecSDave Kleikamp 297617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 298ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 299ac27a0ecSDave Kleikamp 3002b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 301ac27a0ecSDave Kleikamp { 302ac27a0ecSDave Kleikamp char nbuf[16]; 303ac27a0ecSDave Kleikamp const char *errstr; 304ac27a0ecSDave Kleikamp 305ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 306ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 307ac27a0ecSDave Kleikamp * an error. */ 308ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 309ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 310ac27a0ecSDave Kleikamp return; 311ac27a0ecSDave Kleikamp 312617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 313617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 314ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 315ac27a0ecSDave Kleikamp 316617ba13bSMingming Cao ext4_handle_error(sb); 317ac27a0ecSDave Kleikamp } 318ac27a0ecSDave Kleikamp 319ac27a0ecSDave Kleikamp /* 320617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 321ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 322ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 323ac27a0ecSDave Kleikamp * 324ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 325ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 326ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 327ac27a0ecSDave Kleikamp */ 328ac27a0ecSDave Kleikamp 329617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 330ac27a0ecSDave Kleikamp const char *fmt, ...) 331ac27a0ecSDave Kleikamp { 332ac27a0ecSDave Kleikamp va_list args; 333ac27a0ecSDave Kleikamp 334617ba13bSMingming Cao printk(KERN_CRIT "ext4_abort called.\n"); 335ac27a0ecSDave Kleikamp 336ac27a0ecSDave Kleikamp va_start(args, fmt); 337617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 338ac27a0ecSDave Kleikamp vprintk(fmt, args); 339ac27a0ecSDave Kleikamp printk("\n"); 340ac27a0ecSDave Kleikamp va_end(args); 341ac27a0ecSDave Kleikamp 342ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 343617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 344ac27a0ecSDave Kleikamp 345ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 346ac27a0ecSDave Kleikamp return; 347ac27a0ecSDave Kleikamp 348ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 349617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 350ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 351617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 352ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 353dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 354ac27a0ecSDave Kleikamp } 355ac27a0ecSDave Kleikamp 356617ba13bSMingming Cao void ext4_warning(struct super_block *sb, const char *function, 357ac27a0ecSDave Kleikamp const char *fmt, ...) 358ac27a0ecSDave Kleikamp { 359ac27a0ecSDave Kleikamp va_list args; 360ac27a0ecSDave Kleikamp 361ac27a0ecSDave Kleikamp va_start(args, fmt); 362617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 363ac27a0ecSDave Kleikamp sb->s_id, function); 364ac27a0ecSDave Kleikamp vprintk(fmt, args); 365ac27a0ecSDave Kleikamp printk("\n"); 366ac27a0ecSDave Kleikamp va_end(args); 367ac27a0ecSDave Kleikamp } 368ac27a0ecSDave Kleikamp 369*5d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 370*5d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 371*5d1b1b3fSAneesh Kumar K.V __releases(bitlock) 372*5d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 373*5d1b1b3fSAneesh Kumar K.V { 374*5d1b1b3fSAneesh Kumar K.V va_list args; 375*5d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 376*5d1b1b3fSAneesh Kumar K.V 377*5d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 378*5d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 379*5d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 380*5d1b1b3fSAneesh Kumar K.V printk("\n"); 381*5d1b1b3fSAneesh Kumar K.V va_end(args); 382*5d1b1b3fSAneesh Kumar K.V 383*5d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 384*5d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 385*5d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 386*5d1b1b3fSAneesh Kumar K.V ext4_commit_super(sb, es, 0); 387*5d1b1b3fSAneesh Kumar K.V return; 388*5d1b1b3fSAneesh Kumar K.V } 389*5d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 390*5d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 391*5d1b1b3fSAneesh Kumar K.V /* 392*5d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 393*5d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 394*5d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 395*5d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 396*5d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 397*5d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 398*5d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 399*5d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 400*5d1b1b3fSAneesh Kumar K.V * more appropriate error code. 401*5d1b1b3fSAneesh Kumar K.V */ 402*5d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 403*5d1b1b3fSAneesh Kumar K.V return; 404*5d1b1b3fSAneesh Kumar K.V } 405*5d1b1b3fSAneesh Kumar K.V 406*5d1b1b3fSAneesh Kumar K.V 407617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 408ac27a0ecSDave Kleikamp { 409617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 410ac27a0ecSDave Kleikamp 411617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 412ac27a0ecSDave Kleikamp return; 413ac27a0ecSDave Kleikamp 41446e665e9SHarvey Harrison ext4_warning(sb, __func__, 415ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 416ac27a0ecSDave Kleikamp "running e2fsck is recommended", 417617ba13bSMingming Cao EXT4_DYNAMIC_REV); 418ac27a0ecSDave Kleikamp 419617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 420617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 421617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 422ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 423ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 424ac27a0ecSDave Kleikamp 425ac27a0ecSDave Kleikamp /* 426ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 427ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 428ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 429ac27a0ecSDave Kleikamp */ 430ac27a0ecSDave Kleikamp } 431ac27a0ecSDave Kleikamp 432ac27a0ecSDave Kleikamp /* 433ac27a0ecSDave Kleikamp * Open the external journal device 434ac27a0ecSDave Kleikamp */ 435617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 436ac27a0ecSDave Kleikamp { 437ac27a0ecSDave Kleikamp struct block_device *bdev; 438ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 439ac27a0ecSDave Kleikamp 440ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 441ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 442ac27a0ecSDave Kleikamp goto fail; 443ac27a0ecSDave Kleikamp return bdev; 444ac27a0ecSDave Kleikamp 445ac27a0ecSDave Kleikamp fail: 446617ba13bSMingming Cao printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", 447ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 448ac27a0ecSDave Kleikamp return NULL; 449ac27a0ecSDave Kleikamp } 450ac27a0ecSDave Kleikamp 451ac27a0ecSDave Kleikamp /* 452ac27a0ecSDave Kleikamp * Release the journal device 453ac27a0ecSDave Kleikamp */ 454617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 455ac27a0ecSDave Kleikamp { 456ac27a0ecSDave Kleikamp bd_release(bdev); 4579a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 458ac27a0ecSDave Kleikamp } 459ac27a0ecSDave Kleikamp 460617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 461ac27a0ecSDave Kleikamp { 462ac27a0ecSDave Kleikamp struct block_device *bdev; 463ac27a0ecSDave Kleikamp int ret = -ENODEV; 464ac27a0ecSDave Kleikamp 465ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 466ac27a0ecSDave Kleikamp if (bdev) { 467617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 468ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 469ac27a0ecSDave Kleikamp } 470ac27a0ecSDave Kleikamp return ret; 471ac27a0ecSDave Kleikamp } 472ac27a0ecSDave Kleikamp 473ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 474ac27a0ecSDave Kleikamp { 475617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 476ac27a0ecSDave Kleikamp } 477ac27a0ecSDave Kleikamp 478617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 479ac27a0ecSDave Kleikamp { 480ac27a0ecSDave Kleikamp struct list_head *l; 481ac27a0ecSDave Kleikamp 482ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 483ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 484ac27a0ecSDave Kleikamp 485ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 486ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 487ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 488ac27a0ecSDave Kleikamp printk(KERN_ERR " " 489ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 490ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 491ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 492ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 493ac27a0ecSDave Kleikamp } 494ac27a0ecSDave Kleikamp } 495ac27a0ecSDave Kleikamp 496617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 497ac27a0ecSDave Kleikamp { 498617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 499617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 500ef2cabf7SHidehiro Kawai int i, err; 501ac27a0ecSDave Kleikamp 502c9de560dSAlex Tomas ext4_mb_release(sb); 503a86c6181SAlex Tomas ext4_ext_release(sb); 504617ba13bSMingming Cao ext4_xattr_put_super(sb); 5050390131bSFrank Mayhar if (sbi->s_journal) { 506ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 50747b4a50bSJan Kara sbi->s_journal = NULL; 508ef2cabf7SHidehiro Kawai if (err < 0) 5090390131bSFrank Mayhar ext4_abort(sb, __func__, 5100390131bSFrank Mayhar "Couldn't clean up the journal"); 5110390131bSFrank Mayhar } 512ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 513617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 514ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 515617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 516ac27a0ecSDave Kleikamp } 517240799cdSTheodore Ts'o if (sbi->s_proc) { 518240799cdSTheodore Ts'o remove_proc_entry("inode_readahead_blks", sbi->s_proc); 5199f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 520240799cdSTheodore Ts'o } 521ac27a0ecSDave Kleikamp 522ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 523ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 524ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 525772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 526ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 527ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 528ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 5296bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 530ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 531ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 532ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 533ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 534ac27a0ecSDave Kleikamp #endif 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 537ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 538ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 539ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 540ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 541ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 542ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 543ac27a0ecSDave Kleikamp 544f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 545ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 546ac27a0ecSDave Kleikamp /* 547ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 548ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 549ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 550ac27a0ecSDave Kleikamp */ 551ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 552f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 553617ba13bSMingming Cao ext4_blkdev_remove(sbi); 554ac27a0ecSDave Kleikamp } 555ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 556ac27a0ecSDave Kleikamp kfree(sbi); 557ac27a0ecSDave Kleikamp return; 558ac27a0ecSDave Kleikamp } 559ac27a0ecSDave Kleikamp 560e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 561ac27a0ecSDave Kleikamp 562ac27a0ecSDave Kleikamp /* 563ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 564ac27a0ecSDave Kleikamp */ 565617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 566ac27a0ecSDave Kleikamp { 567617ba13bSMingming Cao struct ext4_inode_info *ei; 568ac27a0ecSDave Kleikamp 569e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 570ac27a0ecSDave Kleikamp if (!ei) 571ac27a0ecSDave Kleikamp return NULL; 57203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 573617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 574617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 575ac27a0ecSDave Kleikamp #endif 576ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 57791246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 578a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 579c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 580c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 5810390131bSFrank Mayhar /* 5820390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 5830390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 5840390131bSFrank Mayhar * jinode. 5850390131bSFrank Mayhar */ 586678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 587d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 588d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 589d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 590d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 591d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 592ac27a0ecSDave Kleikamp return &ei->vfs_inode; 593ac27a0ecSDave Kleikamp } 594ac27a0ecSDave Kleikamp 595617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 596ac27a0ecSDave Kleikamp { 5979f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 5989f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 5999f7dd93dSVasily Averin EXT4_I(inode)); 6009f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 6019f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 6029f7dd93dSVasily Averin true); 6039f7dd93dSVasily Averin dump_stack(); 6049f7dd93dSVasily Averin } 605617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 606ac27a0ecSDave Kleikamp } 607ac27a0ecSDave Kleikamp 60851cc5068SAlexey Dobriyan static void init_once(void *foo) 609ac27a0ecSDave Kleikamp { 610617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 611ac27a0ecSDave Kleikamp 612ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 61303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 614ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 615ac27a0ecSDave Kleikamp #endif 6160e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 617ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 618ac27a0ecSDave Kleikamp } 619ac27a0ecSDave Kleikamp 620ac27a0ecSDave Kleikamp static int init_inodecache(void) 621ac27a0ecSDave Kleikamp { 622617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 623617ba13bSMingming Cao sizeof(struct ext4_inode_info), 624ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 625ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 62620c2df83SPaul Mundt init_once); 627617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 628ac27a0ecSDave Kleikamp return -ENOMEM; 629ac27a0ecSDave Kleikamp return 0; 630ac27a0ecSDave Kleikamp } 631ac27a0ecSDave Kleikamp 632ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 633ac27a0ecSDave Kleikamp { 634617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 635ac27a0ecSDave Kleikamp } 636ac27a0ecSDave Kleikamp 637617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 638ac27a0ecSDave Kleikamp { 63903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 640617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 641617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 642617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 643617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 644ac27a0ecSDave Kleikamp } 645617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 646617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 647617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 648617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 649ac27a0ecSDave Kleikamp } 650ac27a0ecSDave Kleikamp #endif 651c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 6520390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 653678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 654678aaf48SJan Kara &EXT4_I(inode)->jinode); 655ac27a0ecSDave Kleikamp } 656ac27a0ecSDave Kleikamp 6572b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 6582b2d6d01STheodore Ts'o struct super_block *sb) 659ac27a0ecSDave Kleikamp { 660ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 661617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 662ac27a0ecSDave Kleikamp 663ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 664ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 665ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); 666ac27a0ecSDave Kleikamp 667ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 668ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 669ac27a0ecSDave Kleikamp 670ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 671ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 672ac27a0ecSDave Kleikamp 673617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 674ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 675ac27a0ecSDave Kleikamp 676617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 677ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 678ac27a0ecSDave Kleikamp #endif 679ac27a0ecSDave Kleikamp } 680ac27a0ecSDave Kleikamp 681d9c9bef1SMiklos Szeredi /* 682d9c9bef1SMiklos Szeredi * Show an option if 683d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 684d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 685d9c9bef1SMiklos Szeredi */ 686617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 687ac27a0ecSDave Kleikamp { 688aa22df2cSAneesh Kumar K.V int def_errors; 689aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 690ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 691d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 692d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 693d9c9bef1SMiklos Szeredi 694d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 695aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 696d9c9bef1SMiklos Szeredi 697d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 698d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 699d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 700d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 701aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 702d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 703d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 704d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 705d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 706d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 707d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 708d9c9bef1SMiklos Szeredi } 709d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 710d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 711d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 712d9c9bef1SMiklos Szeredi } 713bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 714d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 715bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 716d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 717bb4f397aSAneesh Kumar K.V } 718bb4f397aSAneesh Kumar K.V } 719aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 720bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 721aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 722d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 723aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 724d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 725aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 726d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 727d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 728d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 72903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 730aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 731aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 732d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 733d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 734d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 735d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 736d9c9bef1SMiklos Szeredi } 737d9c9bef1SMiklos Szeredi #endif 73803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 739aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 740d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 741d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 742d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 743d9c9bef1SMiklos Szeredi #endif 744d9c9bef1SMiklos Szeredi if (!test_opt(sb, RESERVATION)) 745d9c9bef1SMiklos Szeredi seq_puts(seq, ",noreservation"); 74630773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 747d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 748d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 749d9c9bef1SMiklos Szeredi } 75030773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 75130773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 75230773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 75330773840STheodore Ts'o } 75430773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 75530773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 75630773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 75730773840STheodore Ts'o } 75830773840STheodore Ts'o 759571640caSEric Sandeen /* 760571640caSEric Sandeen * We're changing the default of barrier mount option, so 761571640caSEric Sandeen * let's always display its mount state so it's clear what its 762571640caSEric Sandeen * status is. 763571640caSEric Sandeen */ 764571640caSEric Sandeen seq_puts(seq, ",barrier="); 765571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 766cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 767cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 768d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 769d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 770d9c9bef1SMiklos Szeredi if (!test_opt(sb, EXTENTS)) 771d9c9bef1SMiklos Szeredi seq_puts(seq, ",noextents"); 77225ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 77325ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 774dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 775dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 776dd919b98SAneesh Kumar K.V 777ac27a0ecSDave Kleikamp 778cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 779cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 780aa22df2cSAneesh Kumar K.V /* 781aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 782aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 783aa22df2cSAneesh Kumar K.V */ 784617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 785ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 786617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 787ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 788617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 789ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 790ac27a0ecSDave Kleikamp 791240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 792240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 793240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 794240799cdSTheodore Ts'o 7955bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 7965bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 7975bf5683aSHidehiro Kawai 798617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 799ac27a0ecSDave Kleikamp return 0; 800ac27a0ecSDave Kleikamp } 801ac27a0ecSDave Kleikamp 802ac27a0ecSDave Kleikamp 8031b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 8041b961ac0SChristoph Hellwig u64 ino, u32 generation) 805ac27a0ecSDave Kleikamp { 806ac27a0ecSDave Kleikamp struct inode *inode; 807ac27a0ecSDave Kleikamp 808617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 809ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 810617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 811ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 812ac27a0ecSDave Kleikamp 813ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 814ac27a0ecSDave Kleikamp * 815617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 816ac27a0ecSDave Kleikamp * deleted, so we should be safe. 817ac27a0ecSDave Kleikamp * 818ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 819ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 820ac27a0ecSDave Kleikamp */ 8211d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 8221d1fe1eeSDavid Howells if (IS_ERR(inode)) 8231d1fe1eeSDavid Howells return ERR_CAST(inode); 8241d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 825ac27a0ecSDave Kleikamp iput(inode); 826ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 827ac27a0ecSDave Kleikamp } 8281b961ac0SChristoph Hellwig 8291b961ac0SChristoph Hellwig return inode; 830ac27a0ecSDave Kleikamp } 8311b961ac0SChristoph Hellwig 8321b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 8331b961ac0SChristoph Hellwig int fh_len, int fh_type) 8341b961ac0SChristoph Hellwig { 8351b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 8361b961ac0SChristoph Hellwig ext4_nfs_get_inode); 8371b961ac0SChristoph Hellwig } 8381b961ac0SChristoph Hellwig 8391b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 8401b961ac0SChristoph Hellwig int fh_len, int fh_type) 8411b961ac0SChristoph Hellwig { 8421b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 8431b961ac0SChristoph Hellwig ext4_nfs_get_inode); 844ac27a0ecSDave Kleikamp } 845ac27a0ecSDave Kleikamp 846ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 847ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 848ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 849ac27a0ecSDave Kleikamp 850617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type); 851617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode); 852617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 853617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 854617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 855617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 856617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 8576f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 8586f28e087SJan Kara char *path, int remount); 859617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 860617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 861ac27a0ecSDave Kleikamp size_t len, loff_t off); 862617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 863ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 864ac27a0ecSDave Kleikamp 865617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 866617ba13bSMingming Cao .initialize = ext4_dquot_initialize, 867617ba13bSMingming Cao .drop = ext4_dquot_drop, 868ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 869ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 870ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 871ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 872ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 873617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 874617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 875617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 876617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 877617ba13bSMingming Cao .write_info = ext4_write_info 878ac27a0ecSDave Kleikamp }; 879ac27a0ecSDave Kleikamp 880617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 881617ba13bSMingming Cao .quota_on = ext4_quota_on, 882ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 883ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 884ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 885ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 886ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 887ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 888ac27a0ecSDave Kleikamp }; 889ac27a0ecSDave Kleikamp #endif 890ac27a0ecSDave Kleikamp 891ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 892617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 893617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 894617ba13bSMingming Cao .write_inode = ext4_write_inode, 895617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 896617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 897617ba13bSMingming Cao .put_super = ext4_put_super, 898617ba13bSMingming Cao .write_super = ext4_write_super, 899617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 900617ba13bSMingming Cao .write_super_lockfs = ext4_write_super_lockfs, 901617ba13bSMingming Cao .unlockfs = ext4_unlockfs, 902617ba13bSMingming Cao .statfs = ext4_statfs, 903617ba13bSMingming Cao .remount_fs = ext4_remount, 904617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 905617ba13bSMingming Cao .show_options = ext4_show_options, 906ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 907617ba13bSMingming Cao .quota_read = ext4_quota_read, 908617ba13bSMingming Cao .quota_write = ext4_quota_write, 909ac27a0ecSDave Kleikamp #endif 910ac27a0ecSDave Kleikamp }; 911ac27a0ecSDave Kleikamp 91239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 9131b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 9141b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 915617ba13bSMingming Cao .get_parent = ext4_get_parent, 916ac27a0ecSDave Kleikamp }; 917ac27a0ecSDave Kleikamp 918ac27a0ecSDave Kleikamp enum { 919ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 920ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 92101436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 922ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 923ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 92430773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 92530773840STheodore Ts'o Opt_journal_update, Opt_journal_inum, Opt_journal_dev, 926818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 927ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 9285bf5683aSHidehiro Kawai Opt_data_err_abort, Opt_data_err_ignore, 929ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 930ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 931ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 93225ec56b5SJean Noel Cordenner Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, 93301436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 934240799cdSTheodore Ts'o Opt_inode_readahead_blks 935ac27a0ecSDave Kleikamp }; 936ac27a0ecSDave Kleikamp 937a447c093SSteven Whitehouse static const match_table_t tokens = { 938ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 939ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 940ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 941ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 942ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 943ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 944ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 945ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 946ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 947ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 948ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 949ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 950ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 951ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 952ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 953ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 954ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 955ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 956ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 957ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 958ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 959ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 960ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 961ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 962ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 963ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 96430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 96530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 966ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 967ac27a0ecSDave Kleikamp {Opt_journal_inum, "journal=%u"}, 968ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 969818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 970818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 971ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 972ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 973ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 974ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 9755bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 9765bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 977ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 978ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 979ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 980ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 981ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 982ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 983ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 984ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 985ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 986ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 987ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 988a86c6181SAlex Tomas {Opt_extents, "extents"}, 9891e2462f9SMingming Cao {Opt_noextents, "noextents"}, 99025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 991c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 992ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 99364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 994dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 995240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 996f3f12faaSJosef Bacik {Opt_err, NULL}, 997ac27a0ecSDave Kleikamp }; 998ac27a0ecSDave Kleikamp 999617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1000ac27a0ecSDave Kleikamp { 1001617ba13bSMingming Cao ext4_fsblk_t sb_block; 1002ac27a0ecSDave Kleikamp char *options = (char *) *data; 1003ac27a0ecSDave Kleikamp 1004ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1005ac27a0ecSDave Kleikamp return 1; /* Default location */ 1006ac27a0ecSDave Kleikamp options += 3; 1007617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 1008ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1009ac27a0ecSDave Kleikamp if (*options && *options != ',') { 10104776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1011ac27a0ecSDave Kleikamp (char *) *data); 1012ac27a0ecSDave Kleikamp return 1; 1013ac27a0ecSDave Kleikamp } 1014ac27a0ecSDave Kleikamp if (*options == ',') 1015ac27a0ecSDave Kleikamp options++; 1016ac27a0ecSDave Kleikamp *data = (void *) options; 1017ac27a0ecSDave Kleikamp return sb_block; 1018ac27a0ecSDave Kleikamp } 1019ac27a0ecSDave Kleikamp 1020ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1021ac27a0ecSDave Kleikamp unsigned int *inum, unsigned long *journal_devnum, 1022617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1023ac27a0ecSDave Kleikamp { 1024617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1025ac27a0ecSDave Kleikamp char *p; 1026ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1027ac27a0ecSDave Kleikamp int data_opt = 0; 1028ac27a0ecSDave Kleikamp int option; 1029ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1030dfc5d03fSJan Kara int qtype, qfmt; 1031ac27a0ecSDave Kleikamp char *qname; 1032ac27a0ecSDave Kleikamp #endif 1033c07651b5SAneesh Kumar K.V ext4_fsblk_t last_block; 1034ac27a0ecSDave Kleikamp 1035ac27a0ecSDave Kleikamp if (!options) 1036ac27a0ecSDave Kleikamp return 1; 1037ac27a0ecSDave Kleikamp 1038ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1039ac27a0ecSDave Kleikamp int token; 1040ac27a0ecSDave Kleikamp if (!*p) 1041ac27a0ecSDave Kleikamp continue; 1042ac27a0ecSDave Kleikamp 1043ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1044ac27a0ecSDave Kleikamp switch (token) { 1045ac27a0ecSDave Kleikamp case Opt_bsd_df: 1046ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1047ac27a0ecSDave Kleikamp break; 1048ac27a0ecSDave Kleikamp case Opt_minix_df: 1049ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1050ac27a0ecSDave Kleikamp break; 1051ac27a0ecSDave Kleikamp case Opt_grpid: 1052ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1053ac27a0ecSDave Kleikamp break; 1054ac27a0ecSDave Kleikamp case Opt_nogrpid: 1055ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1056ac27a0ecSDave Kleikamp break; 1057ac27a0ecSDave Kleikamp case Opt_resuid: 1058ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1059ac27a0ecSDave Kleikamp return 0; 1060ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1061ac27a0ecSDave Kleikamp break; 1062ac27a0ecSDave Kleikamp case Opt_resgid: 1063ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1064ac27a0ecSDave Kleikamp return 0; 1065ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1066ac27a0ecSDave Kleikamp break; 1067ac27a0ecSDave Kleikamp case Opt_sb: 1068ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1069ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1070ac27a0ecSDave Kleikamp break; 1071ac27a0ecSDave Kleikamp case Opt_err_panic: 1072ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1073ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1074ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1075ac27a0ecSDave Kleikamp break; 1076ac27a0ecSDave Kleikamp case Opt_err_ro: 1077ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1078ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1079ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1080ac27a0ecSDave Kleikamp break; 1081ac27a0ecSDave Kleikamp case Opt_err_cont: 1082ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1083ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1084ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1085ac27a0ecSDave Kleikamp break; 1086ac27a0ecSDave Kleikamp case Opt_nouid32: 1087ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1088ac27a0ecSDave Kleikamp break; 1089ac27a0ecSDave Kleikamp case Opt_debug: 1090ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1091ac27a0ecSDave Kleikamp break; 1092ac27a0ecSDave Kleikamp case Opt_oldalloc: 1093ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1094ac27a0ecSDave Kleikamp break; 1095ac27a0ecSDave Kleikamp case Opt_orlov: 1096ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1097ac27a0ecSDave Kleikamp break; 109803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1099ac27a0ecSDave Kleikamp case Opt_user_xattr: 1100ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1101ac27a0ecSDave Kleikamp break; 1102ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1103ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1104ac27a0ecSDave Kleikamp break; 1105ac27a0ecSDave Kleikamp #else 1106ac27a0ecSDave Kleikamp case Opt_user_xattr: 1107ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 11084776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)user_xattr options " 11094776004fSTheodore Ts'o "not supported\n"); 1110ac27a0ecSDave Kleikamp break; 1111ac27a0ecSDave Kleikamp #endif 111203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1113ac27a0ecSDave Kleikamp case Opt_acl: 1114ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1115ac27a0ecSDave Kleikamp break; 1116ac27a0ecSDave Kleikamp case Opt_noacl: 1117ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1118ac27a0ecSDave Kleikamp break; 1119ac27a0ecSDave Kleikamp #else 1120ac27a0ecSDave Kleikamp case Opt_acl: 1121ac27a0ecSDave Kleikamp case Opt_noacl: 11224776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)acl options " 11234776004fSTheodore Ts'o "not supported\n"); 1124ac27a0ecSDave Kleikamp break; 1125ac27a0ecSDave Kleikamp #endif 1126ac27a0ecSDave Kleikamp case Opt_reservation: 1127ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1128ac27a0ecSDave Kleikamp break; 1129ac27a0ecSDave Kleikamp case Opt_noreservation: 1130ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 1131ac27a0ecSDave Kleikamp break; 1132ac27a0ecSDave Kleikamp case Opt_journal_update: 1133ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1134ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1135ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1136ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1137ac27a0ecSDave Kleikamp journal file. */ 1138ac27a0ecSDave Kleikamp if (is_remount) { 1139617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1140ac27a0ecSDave Kleikamp "journal on remount\n"); 1141ac27a0ecSDave Kleikamp return 0; 1142ac27a0ecSDave Kleikamp } 1143ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1144ac27a0ecSDave Kleikamp break; 1145ac27a0ecSDave Kleikamp case Opt_journal_inum: 1146ac27a0ecSDave Kleikamp if (is_remount) { 1147617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1148ac27a0ecSDave Kleikamp "journal on remount\n"); 1149ac27a0ecSDave Kleikamp return 0; 1150ac27a0ecSDave Kleikamp } 1151ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1152ac27a0ecSDave Kleikamp return 0; 1153ac27a0ecSDave Kleikamp *inum = option; 1154ac27a0ecSDave Kleikamp break; 1155ac27a0ecSDave Kleikamp case Opt_journal_dev: 1156ac27a0ecSDave Kleikamp if (is_remount) { 1157617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1158ac27a0ecSDave Kleikamp "journal on remount\n"); 1159ac27a0ecSDave Kleikamp return 0; 1160ac27a0ecSDave Kleikamp } 1161ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1162ac27a0ecSDave Kleikamp return 0; 1163ac27a0ecSDave Kleikamp *journal_devnum = option; 1164ac27a0ecSDave Kleikamp break; 1165818d276cSGirish Shilamkar case Opt_journal_checksum: 1166818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1167818d276cSGirish Shilamkar break; 1168818d276cSGirish Shilamkar case Opt_journal_async_commit: 1169818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1170818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1171818d276cSGirish Shilamkar break; 1172ac27a0ecSDave Kleikamp case Opt_noload: 1173ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1174ac27a0ecSDave Kleikamp break; 1175ac27a0ecSDave Kleikamp case Opt_commit: 1176ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1177ac27a0ecSDave Kleikamp return 0; 1178ac27a0ecSDave Kleikamp if (option < 0) 1179ac27a0ecSDave Kleikamp return 0; 1180ac27a0ecSDave Kleikamp if (option == 0) 1181cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1182ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1183ac27a0ecSDave Kleikamp break; 118430773840STheodore Ts'o case Opt_max_batch_time: 118530773840STheodore Ts'o if (match_int(&args[0], &option)) 118630773840STheodore Ts'o return 0; 118730773840STheodore Ts'o if (option < 0) 118830773840STheodore Ts'o return 0; 118930773840STheodore Ts'o if (option == 0) 119030773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 119130773840STheodore Ts'o sbi->s_max_batch_time = option; 119230773840STheodore Ts'o break; 119330773840STheodore Ts'o case Opt_min_batch_time: 119430773840STheodore Ts'o if (match_int(&args[0], &option)) 119530773840STheodore Ts'o return 0; 119630773840STheodore Ts'o if (option < 0) 119730773840STheodore Ts'o return 0; 119830773840STheodore Ts'o sbi->s_min_batch_time = option; 119930773840STheodore Ts'o break; 1200ac27a0ecSDave Kleikamp case Opt_data_journal: 1201617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1202ac27a0ecSDave Kleikamp goto datacheck; 1203ac27a0ecSDave Kleikamp case Opt_data_ordered: 1204617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1205ac27a0ecSDave Kleikamp goto datacheck; 1206ac27a0ecSDave Kleikamp case Opt_data_writeback: 1207617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1208ac27a0ecSDave Kleikamp datacheck: 1209ac27a0ecSDave Kleikamp if (is_remount) { 1210617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1211ac27a0ecSDave Kleikamp != data_opt) { 1212ac27a0ecSDave Kleikamp printk(KERN_ERR 1213617ba13bSMingming Cao "EXT4-fs: cannot change data " 1214ac27a0ecSDave Kleikamp "mode on remount\n"); 1215ac27a0ecSDave Kleikamp return 0; 1216ac27a0ecSDave Kleikamp } 1217ac27a0ecSDave Kleikamp } else { 1218617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1219ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1220ac27a0ecSDave Kleikamp } 1221ac27a0ecSDave Kleikamp break; 12225bf5683aSHidehiro Kawai case Opt_data_err_abort: 12235bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 12245bf5683aSHidehiro Kawai break; 12255bf5683aSHidehiro Kawai case Opt_data_err_ignore: 12265bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 12275bf5683aSHidehiro Kawai break; 1228ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1229ac27a0ecSDave Kleikamp case Opt_usrjquota: 1230ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1231ac27a0ecSDave Kleikamp goto set_qf_name; 1232ac27a0ecSDave Kleikamp case Opt_grpjquota: 1233ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1234ac27a0ecSDave Kleikamp set_qf_name: 1235dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1236dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1237dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1238ac27a0ecSDave Kleikamp printk(KERN_ERR 12392c8be6b2SJan Kara "EXT4-fs: Cannot change journaled " 1240ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1241ac27a0ecSDave Kleikamp return 0; 1242ac27a0ecSDave Kleikamp } 1243ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1244ac27a0ecSDave Kleikamp if (!qname) { 1245ac27a0ecSDave Kleikamp printk(KERN_ERR 1246617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1247ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1248ac27a0ecSDave Kleikamp return 0; 1249ac27a0ecSDave Kleikamp } 1250ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1251ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1252ac27a0ecSDave Kleikamp printk(KERN_ERR 1253617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1254ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1255ac27a0ecSDave Kleikamp kfree(qname); 1256ac27a0ecSDave Kleikamp return 0; 1257ac27a0ecSDave Kleikamp } 1258ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1259ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1260ac27a0ecSDave Kleikamp printk(KERN_ERR 1261617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1262ac27a0ecSDave Kleikamp "filesystem root.\n"); 1263ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1264ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1265ac27a0ecSDave Kleikamp return 0; 1266ac27a0ecSDave Kleikamp } 1267ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1268ac27a0ecSDave Kleikamp break; 1269ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1270ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1271ac27a0ecSDave Kleikamp goto clear_qf_name; 1272ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1273ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1274ac27a0ecSDave Kleikamp clear_qf_name: 1275dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1276dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1277dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1278617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 12792c8be6b2SJan Kara "journaled quota options when " 1280ac27a0ecSDave Kleikamp "quota turned on.\n"); 1281ac27a0ecSDave Kleikamp return 0; 1282ac27a0ecSDave Kleikamp } 1283ac27a0ecSDave Kleikamp /* 1284ac27a0ecSDave Kleikamp * The space will be released later when all options 1285ac27a0ecSDave Kleikamp * are confirmed to be correct 1286ac27a0ecSDave Kleikamp */ 1287ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1288ac27a0ecSDave Kleikamp break; 1289ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1290dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1291dfc5d03fSJan Kara goto set_qf_format; 1292ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1293dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1294dfc5d03fSJan Kara set_qf_format: 1295dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1296dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1297dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1298dfc5d03fSJan Kara printk(KERN_ERR "EXT4-fs: Cannot change " 1299dfc5d03fSJan Kara "journaled quota options when " 1300dfc5d03fSJan Kara "quota turned on.\n"); 1301dfc5d03fSJan Kara return 0; 1302dfc5d03fSJan Kara } 1303dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1304ac27a0ecSDave Kleikamp break; 1305ac27a0ecSDave Kleikamp case Opt_quota: 1306ac27a0ecSDave Kleikamp case Opt_usrquota: 1307ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1308ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1309ac27a0ecSDave Kleikamp break; 1310ac27a0ecSDave Kleikamp case Opt_grpquota: 1311ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1312ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1313ac27a0ecSDave Kleikamp break; 1314ac27a0ecSDave Kleikamp case Opt_noquota: 1315ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1316617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1317ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1318ac27a0ecSDave Kleikamp return 0; 1319ac27a0ecSDave Kleikamp } 1320ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1321ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1322ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1323ac27a0ecSDave Kleikamp break; 1324ac27a0ecSDave Kleikamp #else 1325ac27a0ecSDave Kleikamp case Opt_quota: 1326ac27a0ecSDave Kleikamp case Opt_usrquota: 1327ac27a0ecSDave Kleikamp case Opt_grpquota: 1328cd59e7b9SJan Kara printk(KERN_ERR 1329cd59e7b9SJan Kara "EXT4-fs: quota options not supported.\n"); 1330cd59e7b9SJan Kara break; 1331ac27a0ecSDave Kleikamp case Opt_usrjquota: 1332ac27a0ecSDave Kleikamp case Opt_grpjquota: 1333ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1334ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1335ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1336ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1337ac27a0ecSDave Kleikamp printk(KERN_ERR 1338cd59e7b9SJan Kara "EXT4-fs: journaled quota options not " 1339ac27a0ecSDave Kleikamp "supported.\n"); 1340ac27a0ecSDave Kleikamp break; 1341ac27a0ecSDave Kleikamp case Opt_noquota: 1342ac27a0ecSDave Kleikamp break; 1343ac27a0ecSDave Kleikamp #endif 1344ac27a0ecSDave Kleikamp case Opt_abort: 1345ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1346ac27a0ecSDave Kleikamp break; 1347ac27a0ecSDave Kleikamp case Opt_barrier: 1348ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1349ac27a0ecSDave Kleikamp return 0; 1350ac27a0ecSDave Kleikamp if (option) 1351ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1352ac27a0ecSDave Kleikamp else 1353ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1354ac27a0ecSDave Kleikamp break; 1355ac27a0ecSDave Kleikamp case Opt_ignore: 1356ac27a0ecSDave Kleikamp break; 1357ac27a0ecSDave Kleikamp case Opt_resize: 1358ac27a0ecSDave Kleikamp if (!is_remount) { 1359617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1360ac27a0ecSDave Kleikamp "for remount\n"); 1361ac27a0ecSDave Kleikamp return 0; 1362ac27a0ecSDave Kleikamp } 1363ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1364ac27a0ecSDave Kleikamp return 0; 1365ac27a0ecSDave Kleikamp *n_blocks_count = option; 1366ac27a0ecSDave Kleikamp break; 1367ac27a0ecSDave Kleikamp case Opt_nobh: 1368ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1369ac27a0ecSDave Kleikamp break; 1370ac27a0ecSDave Kleikamp case Opt_bh: 1371ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1372ac27a0ecSDave Kleikamp break; 1373a86c6181SAlex Tomas case Opt_extents: 1374e4079a11SEric Sandeen if (!EXT4_HAS_INCOMPAT_FEATURE(sb, 1375e4079a11SEric Sandeen EXT4_FEATURE_INCOMPAT_EXTENTS)) { 1376e4079a11SEric Sandeen ext4_warning(sb, __func__, 1377e4079a11SEric Sandeen "extents feature not enabled " 1378fde4d95aSTheodore Ts'o "on this filesystem, use tune2fs"); 1379e4079a11SEric Sandeen return 0; 1380e4079a11SEric Sandeen } 1381a86c6181SAlex Tomas set_opt(sbi->s_mount_opt, EXTENTS); 1382a86c6181SAlex Tomas break; 13831e2462f9SMingming Cao case Opt_noextents: 1384c07651b5SAneesh Kumar K.V /* 1385c07651b5SAneesh Kumar K.V * When e2fsprogs support resizing an already existing 1386c07651b5SAneesh Kumar K.V * ext3 file system to greater than 2**32 we need to 1387c07651b5SAneesh Kumar K.V * add support to block allocator to handle growing 1388c07651b5SAneesh Kumar K.V * already existing block mapped inode so that blocks 1389c07651b5SAneesh Kumar K.V * allocated for them fall within 2**32 1390c07651b5SAneesh Kumar K.V */ 1391c07651b5SAneesh Kumar K.V last_block = ext4_blocks_count(sbi->s_es) - 1; 1392c07651b5SAneesh Kumar K.V if (last_block > 0xffffffffULL) { 1393c07651b5SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: Filesystem too " 1394c07651b5SAneesh Kumar K.V "large to mount with " 1395c07651b5SAneesh Kumar K.V "-o noextents options\n"); 1396c07651b5SAneesh Kumar K.V return 0; 1397c07651b5SAneesh Kumar K.V } 13981e2462f9SMingming Cao clear_opt(sbi->s_mount_opt, EXTENTS); 13991e2462f9SMingming Cao break; 140025ec56b5SJean Noel Cordenner case Opt_i_version: 140125ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 140225ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 140325ec56b5SJean Noel Cordenner break; 1404dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1405dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1406dd919b98SAneesh Kumar K.V break; 1407c9de560dSAlex Tomas case Opt_stripe: 1408c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1409c9de560dSAlex Tomas return 0; 1410c9de560dSAlex Tomas if (option < 0) 1411c9de560dSAlex Tomas return 0; 1412c9de560dSAlex Tomas sbi->s_stripe = option; 1413c9de560dSAlex Tomas break; 141464769240SAlex Tomas case Opt_delalloc: 141564769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 141664769240SAlex Tomas break; 1417240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1418240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1419240799cdSTheodore Ts'o return 0; 1420240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1421240799cdSTheodore Ts'o return 0; 1422240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1423240799cdSTheodore Ts'o break; 1424ac27a0ecSDave Kleikamp default: 1425ac27a0ecSDave Kleikamp printk(KERN_ERR 1426617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1427ac27a0ecSDave Kleikamp "or missing value\n", p); 1428ac27a0ecSDave Kleikamp return 0; 1429ac27a0ecSDave Kleikamp } 1430ac27a0ecSDave Kleikamp } 1431ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1432ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1433617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1434ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1435ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1436ac27a0ecSDave Kleikamp 1437617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1438ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1439ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1440ac27a0ecSDave Kleikamp 1441ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1442617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1443ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1444617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1445617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1446ac27a0ecSDave Kleikamp "format mixing.\n"); 1447ac27a0ecSDave Kleikamp return 0; 1448ac27a0ecSDave Kleikamp } 1449ac27a0ecSDave Kleikamp 1450ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 14512c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 1452ac27a0ecSDave Kleikamp "not specified.\n"); 1453ac27a0ecSDave Kleikamp return 0; 1454ac27a0ecSDave Kleikamp } 1455ac27a0ecSDave Kleikamp } else { 1456ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 14572c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 14582c8be6b2SJan Kara "specified with no journaling " 1459ac27a0ecSDave Kleikamp "enabled.\n"); 1460ac27a0ecSDave Kleikamp return 0; 1461ac27a0ecSDave Kleikamp } 1462ac27a0ecSDave Kleikamp } 1463ac27a0ecSDave Kleikamp #endif 1464ac27a0ecSDave Kleikamp return 1; 1465ac27a0ecSDave Kleikamp } 1466ac27a0ecSDave Kleikamp 1467617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1468ac27a0ecSDave Kleikamp int read_only) 1469ac27a0ecSDave Kleikamp { 1470617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1471ac27a0ecSDave Kleikamp int res = 0; 1472ac27a0ecSDave Kleikamp 1473617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1474617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs warning: revision level too high, " 1475ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1476ac27a0ecSDave Kleikamp res = MS_RDONLY; 1477ac27a0ecSDave Kleikamp } 1478ac27a0ecSDave Kleikamp if (read_only) 1479ac27a0ecSDave Kleikamp return res; 1480617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1481617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1482ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1483617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1484ac27a0ecSDave Kleikamp printk(KERN_WARNING 1485617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1486ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1487ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1488ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1489ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1490ac27a0ecSDave Kleikamp printk(KERN_WARNING 1491617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1492ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1493ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1494ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1495ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1496ac27a0ecSDave Kleikamp printk(KERN_WARNING 1497617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1498ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 14990390131bSFrank Mayhar if (!sbi->s_journal) 1500216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1501ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1502617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1503e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1504ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1505617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 15060390131bSFrank Mayhar if (sbi->s_journal) 1507617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1508ac27a0ecSDave Kleikamp 1509617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1510ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1511a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1512ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1513ac27a0ecSDave Kleikamp sb->s_blocksize, 1514ac27a0ecSDave Kleikamp sbi->s_groups_count, 1515617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1516617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1517ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1518ac27a0ecSDave Kleikamp 15190390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 152005496769STheodore Ts'o printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", 152105496769STheodore Ts'o sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : 152205496769STheodore Ts'o "external", EXT4_SB(sb)->s_journal->j_devname); 15230390131bSFrank Mayhar } else { 15240390131bSFrank Mayhar printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); 15250390131bSFrank Mayhar } 1526ac27a0ecSDave Kleikamp return res; 1527ac27a0ecSDave Kleikamp } 1528ac27a0ecSDave Kleikamp 1529772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1530772cb7c8SJose R. Santos { 1531772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1532772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1533772cb7c8SJose R. Santos struct buffer_head *bh; 1534772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1535772cb7c8SJose R. Santos ext4_group_t flex_group; 1536772cb7c8SJose R. Santos int groups_per_flex = 0; 1537772cb7c8SJose R. Santos int i; 1538772cb7c8SJose R. Santos 1539772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1540772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1541772cb7c8SJose R. Santos return 1; 1542772cb7c8SJose R. Santos } 1543772cb7c8SJose R. Santos 1544772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1545772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1546772cb7c8SJose R. Santos 1547c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1548c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1549d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1550d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1551ec05e868SLi Zefan sbi->s_flex_groups = kzalloc(flex_group_count * 1552772cb7c8SJose R. Santos sizeof(struct flex_groups), GFP_KERNEL); 1553772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1554ec05e868SLi Zefan printk(KERN_ERR "EXT4-fs: not enough memory for " 1555a9df9a49STheodore Ts'o "%u flex groups\n", flex_group_count); 1556772cb7c8SJose R. Santos goto failed; 1557772cb7c8SJose R. Santos } 1558772cb7c8SJose R. Santos 1559772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 1560772cb7c8SJose R. Santos gdp = ext4_get_group_desc(sb, i, &bh); 1561772cb7c8SJose R. Santos 1562772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 1563772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_inodes += 1564772cb7c8SJose R. Santos le16_to_cpu(gdp->bg_free_inodes_count); 1565772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_blocks += 1566772cb7c8SJose R. Santos le16_to_cpu(gdp->bg_free_blocks_count); 1567772cb7c8SJose R. Santos } 1568772cb7c8SJose R. Santos 1569772cb7c8SJose R. Santos return 1; 1570772cb7c8SJose R. Santos failed: 1571772cb7c8SJose R. Santos return 0; 1572772cb7c8SJose R. Santos } 1573772cb7c8SJose R. Santos 1574717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1575717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1576717d50e4SAndreas Dilger { 1577717d50e4SAndreas Dilger __u16 crc = 0; 1578717d50e4SAndreas Dilger 1579717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1580717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1581717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1582717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1583717d50e4SAndreas Dilger 1584717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1585717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1586717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1587717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1588717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1589717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1590717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1591717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1592717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1593717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1594717d50e4SAndreas Dilger offset); 1595717d50e4SAndreas Dilger } 1596717d50e4SAndreas Dilger 1597717d50e4SAndreas Dilger return cpu_to_le16(crc); 1598717d50e4SAndreas Dilger } 1599717d50e4SAndreas Dilger 1600717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1601717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1602717d50e4SAndreas Dilger { 1603717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1604717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1605717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1606717d50e4SAndreas Dilger return 0; 1607717d50e4SAndreas Dilger 1608717d50e4SAndreas Dilger return 1; 1609717d50e4SAndreas Dilger } 1610717d50e4SAndreas Dilger 1611ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1612617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1613ac27a0ecSDave Kleikamp { 1614617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1615617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1616617ba13bSMingming Cao ext4_fsblk_t last_block; 1617bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1618bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1619bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1620ce421581SJose R. Santos int flexbg_flag = 0; 1621fd2d4291SAvantika Mathur ext4_group_t i; 1622ac27a0ecSDave Kleikamp 1623ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1624ce421581SJose R. Santos flexbg_flag = 1; 1625ce421581SJose R. Santos 1626617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1627ac27a0ecSDave Kleikamp 1628197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1629197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1630197cd65aSAkinobu Mita 1631ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1632bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1633ac27a0ecSDave Kleikamp else 1634ac27a0ecSDave Kleikamp last_block = first_block + 1635617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1636ac27a0ecSDave Kleikamp 16378fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 16382b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1639c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1640a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 16415128273aSEric Sesterhenn "(block %llu)!\n", i, block_bitmap); 1642ac27a0ecSDave Kleikamp return 0; 1643ac27a0ecSDave Kleikamp } 16448fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 16452b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1646c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1647a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 16485128273aSEric Sesterhenn "(block %llu)!\n", i, inode_bitmap); 1649ac27a0ecSDave Kleikamp return 0; 1650ac27a0ecSDave Kleikamp } 16518fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1652bd81d8eeSLaurent Vivier if (inode_table < first_block || 16532b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1654c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1655a9df9a49STheodore Ts'o "Inode table for group %u not in group " 16565128273aSEric Sesterhenn "(block %llu)!\n", i, inode_table); 1657ac27a0ecSDave Kleikamp return 0; 1658ac27a0ecSDave Kleikamp } 1659b5f10eedSEric Sandeen spin_lock(sb_bgl_lock(sbi, i)); 1660717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1661c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1662a9df9a49STheodore Ts'o "Checksum for group %u failed (%u!=%u)\n", 1663fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1664fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 16657ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 16667ee1ec4cSLi Zefan spin_unlock(sb_bgl_lock(sbi, i)); 1667717d50e4SAndreas Dilger return 0; 1668717d50e4SAndreas Dilger } 16697ee1ec4cSLi Zefan } 1670b5f10eedSEric Sandeen spin_unlock(sb_bgl_lock(sbi, i)); 1671ce421581SJose R. Santos if (!flexbg_flag) 1672617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1673ac27a0ecSDave Kleikamp } 1674ac27a0ecSDave Kleikamp 1675bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1676617ba13bSMingming Cao sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 1677ac27a0ecSDave Kleikamp return 1; 1678ac27a0ecSDave Kleikamp } 1679ac27a0ecSDave Kleikamp 1680617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1681ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1682ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1683ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1684ac27a0ecSDave Kleikamp * 1685ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1686ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1687ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1688ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1689ac27a0ecSDave Kleikamp * 1690ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1691ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1692ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1693617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1694ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1695ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1696ac27a0ecSDave Kleikamp */ 1697617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1698617ba13bSMingming Cao struct ext4_super_block *es) 1699ac27a0ecSDave Kleikamp { 1700ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1701ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1702ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1703ac27a0ecSDave Kleikamp int i; 1704ac27a0ecSDave Kleikamp #endif 1705ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1706ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1707ac27a0ecSDave Kleikamp return; 1708ac27a0ecSDave Kleikamp } 1709ac27a0ecSDave Kleikamp 1710a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1711a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1712a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1713a8f48a95SEric Sandeen return; 1714a8f48a95SEric Sandeen } 1715a8f48a95SEric Sandeen 1716617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1717ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1718ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1719ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1720ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1721ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1722ac27a0ecSDave Kleikamp return; 1723ac27a0ecSDave Kleikamp } 1724ac27a0ecSDave Kleikamp 1725ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1726617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1727ac27a0ecSDave Kleikamp sb->s_id); 1728ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1729ac27a0ecSDave Kleikamp } 1730ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1731ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1732ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1733ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1734ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1735617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1736617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1737ac27a0ecSDave Kleikamp if (ret < 0) 1738ac27a0ecSDave Kleikamp printk(KERN_ERR 17392c8be6b2SJan Kara "EXT4-fs: Cannot turn on journaled " 1740ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1741ac27a0ecSDave Kleikamp } 1742ac27a0ecSDave Kleikamp } 1743ac27a0ecSDave Kleikamp #endif 1744ac27a0ecSDave Kleikamp 1745ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1746ac27a0ecSDave Kleikamp struct inode *inode; 1747ac27a0ecSDave Kleikamp 174897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 174997bd42b9SJosef Bacik if (IS_ERR(inode)) { 1750ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1751ac27a0ecSDave Kleikamp break; 1752ac27a0ecSDave Kleikamp } 1753ac27a0ecSDave Kleikamp 1754617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1755ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 1756ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1757ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1758e5f8eab8STheodore Ts'o "%s: truncating inode %lu to %lld bytes\n", 175946e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1760e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1761ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1762617ba13bSMingming Cao ext4_truncate(inode); 1763ac27a0ecSDave Kleikamp nr_truncates++; 1764ac27a0ecSDave Kleikamp } else { 1765ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1766ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 176746e665e9SHarvey Harrison __func__, inode->i_ino); 1768ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1769ac27a0ecSDave Kleikamp inode->i_ino); 1770ac27a0ecSDave Kleikamp nr_orphans++; 1771ac27a0ecSDave Kleikamp } 1772ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1773ac27a0ecSDave Kleikamp } 1774ac27a0ecSDave Kleikamp 1775ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1776ac27a0ecSDave Kleikamp 1777ac27a0ecSDave Kleikamp if (nr_orphans) 1778617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1779ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1780ac27a0ecSDave Kleikamp if (nr_truncates) 1781617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1782ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1783ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1784ac27a0ecSDave Kleikamp /* Turn quotas off */ 1785ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1786ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 17876f28e087SJan Kara vfs_quota_off(sb, i, 0); 1788ac27a0ecSDave Kleikamp } 1789ac27a0ecSDave Kleikamp #endif 1790ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1791ac27a0ecSDave Kleikamp } 1792cd2291a4SEric Sandeen /* 1793cd2291a4SEric Sandeen * Maximal extent format file size. 1794cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1795cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1796cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1797cd2291a4SEric Sandeen * so that won't be a limiting factor. 1798cd2291a4SEric Sandeen * 1799cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1800cd2291a4SEric Sandeen */ 1801f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 1802cd2291a4SEric Sandeen { 1803cd2291a4SEric Sandeen loff_t res; 1804cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1805cd2291a4SEric Sandeen 1806cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1807f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 1808cd2291a4SEric Sandeen /* 1809b3a6ffe1SJens Axboe * CONFIG_LBD is not enabled implies the inode 1810cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1811cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1812cd2291a4SEric Sandeen */ 1813cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1814cd2291a4SEric Sandeen 1815cd2291a4SEric Sandeen /* total blocks in file system block size */ 1816cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1817cd2291a4SEric Sandeen upper_limit <<= blkbits; 1818cd2291a4SEric Sandeen } 1819cd2291a4SEric Sandeen 1820cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1821cd2291a4SEric Sandeen res = 1LL << 32; 1822cd2291a4SEric Sandeen res <<= blkbits; 1823cd2291a4SEric Sandeen res -= 1; 1824cd2291a4SEric Sandeen 1825cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1826cd2291a4SEric Sandeen if (res > upper_limit) 1827cd2291a4SEric Sandeen res = upper_limit; 1828cd2291a4SEric Sandeen 1829cd2291a4SEric Sandeen return res; 1830cd2291a4SEric Sandeen } 1831ac27a0ecSDave Kleikamp 1832ac27a0ecSDave Kleikamp /* 1833cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 18340fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 18350fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1836ac27a0ecSDave Kleikamp */ 1837f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 1838ac27a0ecSDave Kleikamp { 1839617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 18400fc1b451SAneesh Kumar K.V int meta_blocks; 18410fc1b451SAneesh Kumar K.V loff_t upper_limit; 18420fc1b451SAneesh Kumar K.V /* This is calculated to be the largest file size for a 1843cd2291a4SEric Sandeen * dense, bitmapped file such that the total number of 1844ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 18450fc1b451SAneesh Kumar K.V * does not exceed 2^48 -1 18460fc1b451SAneesh Kumar K.V * __u32 i_blocks_lo and _u16 i_blocks_high representing the 18470fc1b451SAneesh Kumar K.V * total number of 512 bytes blocks of the file 18480fc1b451SAneesh Kumar K.V */ 18490fc1b451SAneesh Kumar K.V 1850f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 18510fc1b451SAneesh Kumar K.V /* 1852b3a6ffe1SJens Axboe * !has_huge_files or CONFIG_LBD is not enabled 1853f287a1a5STheodore Ts'o * implies the inode i_block represent total blocks in 1854f287a1a5STheodore Ts'o * 512 bytes 32 == size of vfs inode i_blocks * 8 18550fc1b451SAneesh Kumar K.V */ 18560fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 18570fc1b451SAneesh Kumar K.V 18580fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 18590fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 18600fc1b451SAneesh Kumar K.V 18610fc1b451SAneesh Kumar K.V } else { 18628180a562SAneesh Kumar K.V /* 18638180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 18648180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 18658180a562SAneesh Kumar K.V * represent total number of blocks in 18668180a562SAneesh Kumar K.V * file system block size 18678180a562SAneesh Kumar K.V */ 18680fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 18690fc1b451SAneesh Kumar K.V 18700fc1b451SAneesh Kumar K.V } 18710fc1b451SAneesh Kumar K.V 18720fc1b451SAneesh Kumar K.V /* indirect blocks */ 18730fc1b451SAneesh Kumar K.V meta_blocks = 1; 18740fc1b451SAneesh Kumar K.V /* double indirect blocks */ 18750fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 18760fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 18770fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 18780fc1b451SAneesh Kumar K.V 18790fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 18800fc1b451SAneesh Kumar K.V upper_limit <<= bits; 1881ac27a0ecSDave Kleikamp 1882ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1883ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1884ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1885ac27a0ecSDave Kleikamp res <<= bits; 1886ac27a0ecSDave Kleikamp if (res > upper_limit) 1887ac27a0ecSDave Kleikamp res = upper_limit; 18880fc1b451SAneesh Kumar K.V 18890fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 18900fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 18910fc1b451SAneesh Kumar K.V 1892ac27a0ecSDave Kleikamp return res; 1893ac27a0ecSDave Kleikamp } 1894ac27a0ecSDave Kleikamp 1895617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 189670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1897ac27a0ecSDave Kleikamp { 1898617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1899fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 1900ac27a0ecSDave Kleikamp int has_super = 0; 1901ac27a0ecSDave Kleikamp 1902ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1903ac27a0ecSDave Kleikamp 1904617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1905ac27a0ecSDave Kleikamp nr < first_meta_bg) 190670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1907ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1908617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1909ac27a0ecSDave Kleikamp has_super = 1; 1910617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1911ac27a0ecSDave Kleikamp } 1912ac27a0ecSDave Kleikamp 1913c9de560dSAlex Tomas /** 1914c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 1915c9de560dSAlex Tomas * @sbi: In memory super block info 1916c9de560dSAlex Tomas * 1917c9de560dSAlex Tomas * If we have specified it via mount option, then 1918c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 1919c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 1920c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 1921c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 1922c9de560dSAlex Tomas * 1923c9de560dSAlex Tomas */ 1924c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 1925c9de560dSAlex Tomas { 1926c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 1927c9de560dSAlex Tomas unsigned long stripe_width = 1928c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 1929c9de560dSAlex Tomas 1930c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 1931c9de560dSAlex Tomas return sbi->s_stripe; 1932c9de560dSAlex Tomas 1933c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 1934c9de560dSAlex Tomas return stripe_width; 1935c9de560dSAlex Tomas 1936c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 1937c9de560dSAlex Tomas return stride; 1938c9de560dSAlex Tomas 1939c9de560dSAlex Tomas return 0; 1940c9de560dSAlex Tomas } 1941ac27a0ecSDave Kleikamp 1942617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 19437477827fSAneesh Kumar K.V __releases(kernel_lock) 19447477827fSAneesh Kumar K.V __acquires(kernel_lock) 19451d03ec98SAneesh Kumar K.V 1946ac27a0ecSDave Kleikamp { 1947ac27a0ecSDave Kleikamp struct buffer_head *bh; 1948617ba13bSMingming Cao struct ext4_super_block *es = NULL; 1949617ba13bSMingming Cao struct ext4_sb_info *sbi; 1950617ba13bSMingming Cao ext4_fsblk_t block; 1951617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 195270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 1953ac27a0ecSDave Kleikamp unsigned long offset = 0; 1954ac27a0ecSDave Kleikamp unsigned int journal_inum = 0; 1955ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 1956ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 1957ac27a0ecSDave Kleikamp struct inode *root; 19589f6200bbSTheodore Ts'o char *cp; 19590390131bSFrank Mayhar const char *descr; 19601d1fe1eeSDavid Howells int ret = -EINVAL; 1961ac27a0ecSDave Kleikamp int blocksize; 1962ac27a0ecSDave Kleikamp int db_count; 1963ac27a0ecSDave Kleikamp int i; 1964f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 19653a06d778SAneesh Kumar K.V int features; 1966bd81d8eeSLaurent Vivier __u64 blocks_count; 1967833f4077SPeter Zijlstra int err; 1968ac27a0ecSDave Kleikamp 1969ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 1970ac27a0ecSDave Kleikamp if (!sbi) 1971ac27a0ecSDave Kleikamp return -ENOMEM; 1972ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 1973ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 1974617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 1975617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 1976240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 1977d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 1978ac27a0ecSDave Kleikamp 1979ac27a0ecSDave Kleikamp unlock_kernel(); 1980ac27a0ecSDave Kleikamp 19819f6200bbSTheodore Ts'o /* Cleanup superblock name */ 19829f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 19839f6200bbSTheodore Ts'o *cp = '!'; 19849f6200bbSTheodore Ts'o 1985617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 1986ac27a0ecSDave Kleikamp if (!blocksize) { 1987617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 1988ac27a0ecSDave Kleikamp goto out_fail; 1989ac27a0ecSDave Kleikamp } 1990ac27a0ecSDave Kleikamp 1991ac27a0ecSDave Kleikamp /* 1992617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 1993ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 1994ac27a0ecSDave Kleikamp */ 1995617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 199670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 199770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 1998ac27a0ecSDave Kleikamp } else { 199970bbb3e0SAndrew Morton logical_sb_block = sb_block; 2000ac27a0ecSDave Kleikamp } 2001ac27a0ecSDave Kleikamp 200270bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2003617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); 2004ac27a0ecSDave Kleikamp goto out_fail; 2005ac27a0ecSDave Kleikamp } 2006ac27a0ecSDave Kleikamp /* 2007ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2008617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2009ac27a0ecSDave Kleikamp */ 2010617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2011ac27a0ecSDave Kleikamp sbi->s_es = es; 2012ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2013617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2014617ba13bSMingming Cao goto cantfind_ext4; 2015ac27a0ecSDave Kleikamp 2016ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2017ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2018617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2019ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2020617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 2021ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2022617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2023ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 202403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2025617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2026ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 20272e7842b8SHugh Dickins #endif 202803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2029617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2030ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 20312e7842b8SHugh Dickins #endif 2032617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2033617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2034617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2035617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2036617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2037617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2038ac27a0ecSDave Kleikamp 2039617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2040ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2041bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2042ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2043bb4f397aSAneesh Kumar K.V else 2044bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2045ac27a0ecSDave Kleikamp 2046ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2047ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 204830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 204930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 205030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2051ac27a0ecSDave Kleikamp 2052ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 2053571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2054ac27a0ecSDave Kleikamp 20551e2462f9SMingming Cao /* 20561e2462f9SMingming Cao * turn on extents feature by default in ext4 filesystem 2057e4079a11SEric Sandeen * only if feature flag already set by mkfs or tune2fs. 2058e4079a11SEric Sandeen * Use -o noextents to turn it off 20591e2462f9SMingming Cao */ 2060e4079a11SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 20611e2462f9SMingming Cao set_opt(sbi->s_mount_opt, EXTENTS); 2062e4079a11SEric Sandeen else 2063e4079a11SEric Sandeen ext4_warning(sb, __func__, 2064e4079a11SEric Sandeen "extents feature not enabled on this filesystem, " 2065fde4d95aSTheodore Ts'o "use tune2fs."); 20661e2462f9SMingming Cao 2067dd919b98SAneesh Kumar K.V /* 2068dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2069dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2070dd919b98SAneesh Kumar K.V */ 2071dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2072dd919b98SAneesh Kumar K.V 2073dd919b98SAneesh Kumar K.V 2074ac27a0ecSDave Kleikamp if (!parse_options((char *) data, sb, &journal_inum, &journal_devnum, 2075ac27a0ecSDave Kleikamp NULL, 0)) 2076ac27a0ecSDave Kleikamp goto failed_mount; 2077ac27a0ecSDave Kleikamp 2078ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2079617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2080ac27a0ecSDave Kleikamp 2081617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2082617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2083617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2084617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2085ac27a0ecSDave Kleikamp printk(KERN_WARNING 2086617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 2087ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 2088469108ffSTheodore Tso 2089469108ffSTheodore Tso /* 2090ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2091ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2092ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2093ac27a0ecSDave Kleikamp */ 2094617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 2095ac27a0ecSDave Kleikamp if (features) { 2096617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 20973a06d778SAneesh Kumar K.V "unsupported optional features (%x).\n", sb->s_id, 20983a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 20993a06d778SAneesh Kumar K.V ~EXT4_FEATURE_INCOMPAT_SUPP)); 2100ac27a0ecSDave Kleikamp goto failed_mount; 2101ac27a0ecSDave Kleikamp } 2102617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 2103ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 2104617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 21053a06d778SAneesh Kumar K.V "unsupported optional features (%x).\n", sb->s_id, 21063a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 21073a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2108ac27a0ecSDave Kleikamp goto failed_mount; 2109ac27a0ecSDave Kleikamp } 2110f287a1a5STheodore Ts'o has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2111f287a1a5STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2112f287a1a5STheodore Ts'o if (has_huge_files) { 21130fc1b451SAneesh Kumar K.V /* 21140fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 2115b3a6ffe1SJens Axboe * mount if kernel is build with CONFIG_LBD 21160fc1b451SAneesh Kumar K.V */ 21170fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 21180fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 21190fc1b451SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " 21200fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 2121b3a6ffe1SJens Axboe "without CONFIG_LBD.\n", sb->s_id); 21220fc1b451SAneesh Kumar K.V goto failed_mount; 21230fc1b451SAneesh Kumar K.V } 21240fc1b451SAneesh Kumar K.V } 2125ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2126ac27a0ecSDave Kleikamp 2127617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2128617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2129ac27a0ecSDave Kleikamp printk(KERN_ERR 2130617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 2131ac27a0ecSDave Kleikamp blocksize, sb->s_id); 2132ac27a0ecSDave Kleikamp goto failed_mount; 2133ac27a0ecSDave Kleikamp } 2134ac27a0ecSDave Kleikamp 2135ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2136ce40733cSAneesh Kumar K.V 2137ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2138ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2139ce40733cSAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: bad block size %d.\n", 2140ce40733cSAneesh Kumar K.V blocksize); 2141ac27a0ecSDave Kleikamp goto failed_mount; 2142ac27a0ecSDave Kleikamp } 2143ac27a0ecSDave Kleikamp 2144ac27a0ecSDave Kleikamp brelse(bh); 214570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 214670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 214770bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2148ac27a0ecSDave Kleikamp if (!bh) { 2149ac27a0ecSDave Kleikamp printk(KERN_ERR 2150617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 2151ac27a0ecSDave Kleikamp goto failed_mount; 2152ac27a0ecSDave Kleikamp } 2153617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2154ac27a0ecSDave Kleikamp sbi->s_es = es; 2155617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2156ac27a0ecSDave Kleikamp printk(KERN_ERR 2157617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 2158ac27a0ecSDave Kleikamp goto failed_mount; 2159ac27a0ecSDave Kleikamp } 2160ac27a0ecSDave Kleikamp } 2161ac27a0ecSDave Kleikamp 2162f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2163f287a1a5STheodore Ts'o has_huge_files); 2164f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2165ac27a0ecSDave Kleikamp 2166617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2167617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2168617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2169ac27a0ecSDave Kleikamp } else { 2170ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2171ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2172617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 21731330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2174ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2175ac27a0ecSDave Kleikamp printk(KERN_ERR 2176617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 2177ac27a0ecSDave Kleikamp sbi->s_inode_size); 2178ac27a0ecSDave Kleikamp goto failed_mount; 2179ac27a0ecSDave Kleikamp } 2180ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2181ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2182ac27a0ecSDave Kleikamp } 21830d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 21840d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 21858fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 21860d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2187d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 21880d1ee42fSAlexandre Ratchov printk(KERN_ERR 21898fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 21900d1ee42fSAlexandre Ratchov sbi->s_desc_size); 21910d1ee42fSAlexandre Ratchov goto failed_mount; 21920d1ee42fSAlexandre Ratchov } 21930d1ee42fSAlexandre Ratchov } else 21940d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 2195ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2196ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2197b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2198617ba13bSMingming Cao goto cantfind_ext4; 2199617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2200ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2201617ba13bSMingming Cao goto cantfind_ext4; 2202ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2203ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 22040d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2205ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2206ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2207e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2208e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 2209ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2210ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2211ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2212f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2213f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2214f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2215f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2216f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2217f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2218f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2219f99b2589STheodore Ts'o #else 2220f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2221f99b2589STheodore Ts'o #endif 2222f99b2589STheodore Ts'o sb->s_dirt = 1; 2223f99b2589STheodore Ts'o } 2224ac27a0ecSDave Kleikamp 2225ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2226ac27a0ecSDave Kleikamp printk(KERN_ERR 2227617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 2228ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2229ac27a0ecSDave Kleikamp goto failed_mount; 2230ac27a0ecSDave Kleikamp } 2231ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2232ac27a0ecSDave Kleikamp printk(KERN_ERR 2233617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 2234ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2235ac27a0ecSDave Kleikamp goto failed_mount; 2236ac27a0ecSDave Kleikamp } 2237ac27a0ecSDave Kleikamp 2238bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2239ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2240617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 2241ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 2242ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2243617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 2244ac27a0ecSDave Kleikamp "enabled\n"); 2245ac27a0ecSDave Kleikamp goto failed_mount; 2246ac27a0ecSDave Kleikamp } 2247ac27a0ecSDave Kleikamp 2248617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2249617ba13bSMingming Cao goto cantfind_ext4; 2250e7c95593SEric Sandeen 2251e7c95593SEric Sandeen /* ensure blocks_count calculation below doesn't sign-extend */ 2252e7c95593SEric Sandeen if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < 2253e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block) + 1) { 2254e7c95593SEric Sandeen printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " 2255e7c95593SEric Sandeen "first data block %u, blocks per group %lu\n", 2256e7c95593SEric Sandeen ext4_blocks_count(es), 2257e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 2258e7c95593SEric Sandeen EXT4_BLOCKS_PER_GROUP(sb)); 2259e7c95593SEric Sandeen goto failed_mount; 2260e7c95593SEric Sandeen } 2261bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2262bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2263bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2264bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 2265bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2266617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2267617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2268ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2269ac27a0ecSDave Kleikamp GFP_KERNEL); 2270ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2271617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: not enough memory\n"); 2272ac27a0ecSDave Kleikamp goto failed_mount; 2273ac27a0ecSDave Kleikamp } 2274ac27a0ecSDave Kleikamp 22753244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 22769f6200bbSTheodore Ts'o if (ext4_proc_root) 22779f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 22789f6200bbSTheodore Ts'o 2279240799cdSTheodore Ts'o if (sbi->s_proc) 2280240799cdSTheodore Ts'o proc_create_data("inode_readahead_blks", 0644, sbi->s_proc, 2281240799cdSTheodore Ts'o &ext4_ui_proc_fops, 2282240799cdSTheodore Ts'o &sbi->s_inode_readahead_blks); 22833244fcb1SAlexander Beregalov #endif 2284240799cdSTheodore Ts'o 2285ac27a0ecSDave Kleikamp bgl_lock_init(&sbi->s_blockgroup_lock); 2286ac27a0ecSDave Kleikamp 2287ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 228870bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2289ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2290ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2291617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: " 2292ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 2293ac27a0ecSDave Kleikamp db_count = i; 2294ac27a0ecSDave Kleikamp goto failed_mount2; 2295ac27a0ecSDave Kleikamp } 2296ac27a0ecSDave Kleikamp } 2297617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2298617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 2299ac27a0ecSDave Kleikamp goto failed_mount2; 2300ac27a0ecSDave Kleikamp } 2301772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2302772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2303772cb7c8SJose R. Santos printk(KERN_ERR 2304772cb7c8SJose R. Santos "EXT4-fs: unable to initialize " 2305772cb7c8SJose R. Santos "flex_bg meta info!\n"); 2306772cb7c8SJose R. Santos goto failed_mount2; 2307772cb7c8SJose R. Santos } 2308772cb7c8SJose R. Santos 2309ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2310ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2311ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2312ac27a0ecSDave Kleikamp 2313833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2314617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2315833f4077SPeter Zijlstra if (!err) { 2316833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2317617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2318833f4077SPeter Zijlstra } 2319833f4077SPeter Zijlstra if (!err) { 2320833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2321617ba13bSMingming Cao ext4_count_dirs(sb)); 2322833f4077SPeter Zijlstra } 23236bc6e63fSAneesh Kumar K.V if (!err) { 23246bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 23256bc6e63fSAneesh Kumar K.V } 2326833f4077SPeter Zijlstra if (err) { 2327833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 2328833f4077SPeter Zijlstra goto failed_mount3; 2329833f4077SPeter Zijlstra } 2330ac27a0ecSDave Kleikamp 2331c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2332c9de560dSAlex Tomas 2333ac27a0ecSDave Kleikamp /* 2334ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2335ac27a0ecSDave Kleikamp */ 2336617ba13bSMingming Cao sb->s_op = &ext4_sops; 2337617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2338617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2339ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2340617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2341617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2342ac27a0ecSDave Kleikamp #endif 2343ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 2344ac27a0ecSDave Kleikamp 2345ac27a0ecSDave Kleikamp sb->s_root = NULL; 2346ac27a0ecSDave Kleikamp 2347ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2348617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2349617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2350ac27a0ecSDave Kleikamp 2351ac27a0ecSDave Kleikamp /* 2352ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2353ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2354ac27a0ecSDave Kleikamp */ 2355ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2356617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2357617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2358ac27a0ecSDave Kleikamp goto failed_mount3; 2359624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2360624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2361624080edSTheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): " 2362624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2363624080edSTheodore Ts'o "%u is corrupt\n", sb->s_id, 2364624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2365624080edSTheodore Ts'o if (test_opt(sb, ERRORS_RO)) { 2366624080edSTheodore Ts'o printk(KERN_CRIT 2367624080edSTheodore Ts'o "Mounting filesystem read-only\n"); 2368624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2369624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2370624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2371624080edSTheodore Ts'o } 2372624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2373624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2374624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2375624080edSTheodore Ts'o ext4_commit_super(sb, es, 1); 2376624080edSTheodore Ts'o goto failed_mount4; 2377624080edSTheodore Ts'o } 2378624080edSTheodore Ts'o } 2379ac27a0ecSDave Kleikamp } else if (journal_inum) { 2380617ba13bSMingming Cao if (ext4_create_journal(sb, es, journal_inum)) 2381ac27a0ecSDave Kleikamp goto failed_mount3; 23820390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 23830390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 23840390131bSFrank Mayhar printk(KERN_ERR "EXT4-fs: required journal recovery " 23850390131bSFrank Mayhar "suppressed and not mounted read-only\n"); 23860390131bSFrank Mayhar goto failed_mount4; 2387ac27a0ecSDave Kleikamp } else { 23880390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 23890390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 23900390131bSFrank Mayhar sbi->s_journal = NULL; 23910390131bSFrank Mayhar needs_recovery = 0; 23920390131bSFrank Mayhar goto no_journal; 2393ac27a0ecSDave Kleikamp } 2394ac27a0ecSDave Kleikamp 2395eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2396eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2397eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2398eb40a09cSJose R. Santos printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); 2399eb40a09cSJose R. Santos goto failed_mount4; 2400eb40a09cSJose R. Santos } 2401eb40a09cSJose R. Santos 2402818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2403818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2404818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2405818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2406818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2407818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2408818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2409818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2410818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2411818d276cSGirish Shilamkar } else { 2412818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2413818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2414818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2415818d276cSGirish Shilamkar } 2416818d276cSGirish Shilamkar 2417ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2418ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2419ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2420ac27a0ecSDave Kleikamp case 0: 2421ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 242263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 242363f57933SAndrew Morton * cope, else JOURNAL_DATA 242463f57933SAndrew Morton */ 2425dab291afSMingming Cao if (jbd2_journal_check_available_features 2426dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2427ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2428ac27a0ecSDave Kleikamp else 2429ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2430ac27a0ecSDave Kleikamp break; 2431ac27a0ecSDave Kleikamp 2432617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2433617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2434dab291afSMingming Cao if (!jbd2_journal_check_available_features 2435dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2436617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 2437ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 2438ac27a0ecSDave Kleikamp goto failed_mount4; 2439ac27a0ecSDave Kleikamp } 2440ac27a0ecSDave Kleikamp default: 2441ac27a0ecSDave Kleikamp break; 2442ac27a0ecSDave Kleikamp } 2443ac27a0ecSDave Kleikamp 24440390131bSFrank Mayhar no_journal: 24450390131bSFrank Mayhar 2446ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2447617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2448617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 2449ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 2450ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2451ac27a0ecSDave Kleikamp } 2452ac27a0ecSDave Kleikamp } 2453ac27a0ecSDave Kleikamp /* 2454dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2455ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2456ac27a0ecSDave Kleikamp */ 2457ac27a0ecSDave Kleikamp 24581d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 24591d1fe1eeSDavid Howells if (IS_ERR(root)) { 2460617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 24611d1fe1eeSDavid Howells ret = PTR_ERR(root); 2462ac27a0ecSDave Kleikamp goto failed_mount4; 2463ac27a0ecSDave Kleikamp } 2464ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 24651d1fe1eeSDavid Howells iput(root); 2466617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 2467ac27a0ecSDave Kleikamp goto failed_mount4; 2468ac27a0ecSDave Kleikamp } 24691d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 24701d1fe1eeSDavid Howells if (!sb->s_root) { 24711d1fe1eeSDavid Howells printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); 24721d1fe1eeSDavid Howells iput(root); 24731d1fe1eeSDavid Howells ret = -ENOMEM; 24741d1fe1eeSDavid Howells goto failed_mount4; 24751d1fe1eeSDavid Howells } 2476ac27a0ecSDave Kleikamp 2477617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2478ef7f3835SKalpak Shah 2479ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2480ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2481ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2482ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2483ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2484ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2485ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2486ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2487ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2488ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2489ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2490ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2491ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2492ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2493ef7f3835SKalpak Shah } 2494ef7f3835SKalpak Shah } 2495ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2496ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2497ef7f3835SKalpak Shah sbi->s_inode_size) { 2498ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2499ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2500ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 2501ef7f3835SKalpak Shah "available.\n"); 2502ef7f3835SKalpak Shah } 2503ef7f3835SKalpak Shah 2504c2774d84SAneesh Kumar K.V if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2505c2774d84SAneesh Kumar K.V printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " 2506c2774d84SAneesh Kumar K.V "requested data journaling mode\n"); 2507c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 2508c2774d84SAneesh Kumar K.V } else if (test_opt(sb, DELALLOC)) 2509c2774d84SAneesh Kumar K.V printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); 2510c2774d84SAneesh Kumar K.V 2511c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2512c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2513c2774d84SAneesh Kumar K.V if (err) { 2514c2774d84SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", 2515c2774d84SAneesh Kumar K.V err); 2516c2774d84SAneesh Kumar K.V goto failed_mount4; 2517c2774d84SAneesh Kumar K.V } 2518c2774d84SAneesh Kumar K.V 2519ac27a0ecSDave Kleikamp /* 2520ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 2521ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 2522ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 2523ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 2524ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 2525ac27a0ecSDave Kleikamp * superblock lock. 2526ac27a0ecSDave Kleikamp */ 2527617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2528617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2529617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 25300390131bSFrank Mayhar if (needs_recovery) { 2531617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: recovery complete.\n"); 2532617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 25330390131bSFrank Mayhar } 25340390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 25350390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 25360390131bSFrank Mayhar descr = " journalled data mode"; 25370390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 25380390131bSFrank Mayhar descr = " ordered data mode"; 25390390131bSFrank Mayhar else 25400390131bSFrank Mayhar descr = " writeback data mode"; 25410390131bSFrank Mayhar } else 25420390131bSFrank Mayhar descr = "out journal"; 25430390131bSFrank Mayhar 25440390131bSFrank Mayhar printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", 25450390131bSFrank Mayhar sb->s_id, descr); 2546ac27a0ecSDave Kleikamp 2547ac27a0ecSDave Kleikamp lock_kernel(); 2548ac27a0ecSDave Kleikamp return 0; 2549ac27a0ecSDave Kleikamp 2550617ba13bSMingming Cao cantfind_ext4: 2551ac27a0ecSDave Kleikamp if (!silent) 2552617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 2553ac27a0ecSDave Kleikamp sb->s_id); 2554ac27a0ecSDave Kleikamp goto failed_mount; 2555ac27a0ecSDave Kleikamp 2556ac27a0ecSDave Kleikamp failed_mount4: 25570390131bSFrank Mayhar printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); 25580390131bSFrank Mayhar if (sbi->s_journal) { 2559dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 256047b4a50bSJan Kara sbi->s_journal = NULL; 25610390131bSFrank Mayhar } 2562ac27a0ecSDave Kleikamp failed_mount3: 2563ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2564ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2565ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 25666bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2567ac27a0ecSDave Kleikamp failed_mount2: 2568ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2569ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2570ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2571ac27a0ecSDave Kleikamp failed_mount: 2572240799cdSTheodore Ts'o if (sbi->s_proc) { 2573240799cdSTheodore Ts'o remove_proc_entry("inode_readahead_blks", sbi->s_proc); 25749f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2575240799cdSTheodore Ts'o } 2576ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2577ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2578ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2579ac27a0ecSDave Kleikamp #endif 2580617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2581ac27a0ecSDave Kleikamp brelse(bh); 2582ac27a0ecSDave Kleikamp out_fail: 2583ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2584ac27a0ecSDave Kleikamp kfree(sbi); 2585ac27a0ecSDave Kleikamp lock_kernel(); 25861d1fe1eeSDavid Howells return ret; 2587ac27a0ecSDave Kleikamp } 2588ac27a0ecSDave Kleikamp 2589ac27a0ecSDave Kleikamp /* 2590ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2591ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2592ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2593ac27a0ecSDave Kleikamp */ 2594617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2595ac27a0ecSDave Kleikamp { 2596617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2597ac27a0ecSDave Kleikamp 2598ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 259930773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 260030773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 2601ac27a0ecSDave Kleikamp 2602ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2603ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2604dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2605ac27a0ecSDave Kleikamp else 2606dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 26075bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 26085bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 26095bf5683aSHidehiro Kawai else 26105bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 2611ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2612ac27a0ecSDave Kleikamp } 2613ac27a0ecSDave Kleikamp 2614617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2615ac27a0ecSDave Kleikamp unsigned int journal_inum) 2616ac27a0ecSDave Kleikamp { 2617ac27a0ecSDave Kleikamp struct inode *journal_inode; 2618ac27a0ecSDave Kleikamp journal_t *journal; 2619ac27a0ecSDave Kleikamp 26200390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 26210390131bSFrank Mayhar 2622ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2623ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2624ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2625ac27a0ecSDave Kleikamp 26261d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 26271d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2628617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2629ac27a0ecSDave Kleikamp return NULL; 2630ac27a0ecSDave Kleikamp } 2631ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2632ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2633ac27a0ecSDave Kleikamp iput(journal_inode); 2634617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2635ac27a0ecSDave Kleikamp return NULL; 2636ac27a0ecSDave Kleikamp } 2637ac27a0ecSDave Kleikamp 2638e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 2639ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 26401d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2641617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2642ac27a0ecSDave Kleikamp iput(journal_inode); 2643ac27a0ecSDave Kleikamp return NULL; 2644ac27a0ecSDave Kleikamp } 2645ac27a0ecSDave Kleikamp 2646dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2647ac27a0ecSDave Kleikamp if (!journal) { 2648617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2649ac27a0ecSDave Kleikamp iput(journal_inode); 2650ac27a0ecSDave Kleikamp return NULL; 2651ac27a0ecSDave Kleikamp } 2652ac27a0ecSDave Kleikamp journal->j_private = sb; 2653617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2654ac27a0ecSDave Kleikamp return journal; 2655ac27a0ecSDave Kleikamp } 2656ac27a0ecSDave Kleikamp 2657617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2658ac27a0ecSDave Kleikamp dev_t j_dev) 2659ac27a0ecSDave Kleikamp { 2660ac27a0ecSDave Kleikamp struct buffer_head *bh; 2661ac27a0ecSDave Kleikamp journal_t *journal; 2662617ba13bSMingming Cao ext4_fsblk_t start; 2663617ba13bSMingming Cao ext4_fsblk_t len; 2664ac27a0ecSDave Kleikamp int hblock, blocksize; 2665617ba13bSMingming Cao ext4_fsblk_t sb_block; 2666ac27a0ecSDave Kleikamp unsigned long offset; 2667617ba13bSMingming Cao struct ext4_super_block *es; 2668ac27a0ecSDave Kleikamp struct block_device *bdev; 2669ac27a0ecSDave Kleikamp 26700390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 26710390131bSFrank Mayhar 2672617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2673ac27a0ecSDave Kleikamp if (bdev == NULL) 2674ac27a0ecSDave Kleikamp return NULL; 2675ac27a0ecSDave Kleikamp 2676ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2677ac27a0ecSDave Kleikamp printk(KERN_ERR 2678617ba13bSMingming Cao "EXT4: failed to claim external journal device.\n"); 26799a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 2680ac27a0ecSDave Kleikamp return NULL; 2681ac27a0ecSDave Kleikamp } 2682ac27a0ecSDave Kleikamp 2683ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2684ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2685ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2686ac27a0ecSDave Kleikamp printk(KERN_ERR 2687617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2688ac27a0ecSDave Kleikamp goto out_bdev; 2689ac27a0ecSDave Kleikamp } 2690ac27a0ecSDave Kleikamp 2691617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2692617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2693ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2694ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2695617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2696ac27a0ecSDave Kleikamp "external journal\n"); 2697ac27a0ecSDave Kleikamp goto out_bdev; 2698ac27a0ecSDave Kleikamp } 2699ac27a0ecSDave Kleikamp 2700617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2701617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2702ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2703617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2704617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2705ac27a0ecSDave Kleikamp "bad superblock\n"); 2706ac27a0ecSDave Kleikamp brelse(bh); 2707ac27a0ecSDave Kleikamp goto out_bdev; 2708ac27a0ecSDave Kleikamp } 2709ac27a0ecSDave Kleikamp 2710617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2711617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2712ac27a0ecSDave Kleikamp brelse(bh); 2713ac27a0ecSDave Kleikamp goto out_bdev; 2714ac27a0ecSDave Kleikamp } 2715ac27a0ecSDave Kleikamp 2716bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2717ac27a0ecSDave Kleikamp start = sb_block + 1; 2718ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2719ac27a0ecSDave Kleikamp 2720dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2721ac27a0ecSDave Kleikamp start, len, blocksize); 2722ac27a0ecSDave Kleikamp if (!journal) { 2723617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2724ac27a0ecSDave Kleikamp goto out_bdev; 2725ac27a0ecSDave Kleikamp } 2726ac27a0ecSDave Kleikamp journal->j_private = sb; 2727ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2728ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2729ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2730617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2731ac27a0ecSDave Kleikamp goto out_journal; 2732ac27a0ecSDave Kleikamp } 2733ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2734617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2735ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2736ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2737ac27a0ecSDave Kleikamp goto out_journal; 2738ac27a0ecSDave Kleikamp } 2739617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2740617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2741ac27a0ecSDave Kleikamp return journal; 2742ac27a0ecSDave Kleikamp out_journal: 2743dab291afSMingming Cao jbd2_journal_destroy(journal); 2744ac27a0ecSDave Kleikamp out_bdev: 2745617ba13bSMingming Cao ext4_blkdev_put(bdev); 2746ac27a0ecSDave Kleikamp return NULL; 2747ac27a0ecSDave Kleikamp } 2748ac27a0ecSDave Kleikamp 2749617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2750617ba13bSMingming Cao struct ext4_super_block *es, 2751ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2752ac27a0ecSDave Kleikamp { 2753ac27a0ecSDave Kleikamp journal_t *journal; 2754ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2755ac27a0ecSDave Kleikamp dev_t journal_dev; 2756ac27a0ecSDave Kleikamp int err = 0; 2757ac27a0ecSDave Kleikamp int really_read_only; 2758ac27a0ecSDave Kleikamp 27590390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 27600390131bSFrank Mayhar 2761ac27a0ecSDave Kleikamp if (journal_devnum && 2762ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2763617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2764ac27a0ecSDave Kleikamp "numbers have changed\n"); 2765ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2766ac27a0ecSDave Kleikamp } else 2767ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2768ac27a0ecSDave Kleikamp 2769ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2770ac27a0ecSDave Kleikamp 2771ac27a0ecSDave Kleikamp /* 2772ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2773ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2774ac27a0ecSDave Kleikamp * can get read-write access to the device. 2775ac27a0ecSDave Kleikamp */ 2776ac27a0ecSDave Kleikamp 2777617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2778ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2779617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2780ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2781ac27a0ecSDave Kleikamp if (really_read_only) { 2782617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2783ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2784ac27a0ecSDave Kleikamp return -EROFS; 2785ac27a0ecSDave Kleikamp } 2786617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: write access will " 2787ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2788ac27a0ecSDave Kleikamp } 2789ac27a0ecSDave Kleikamp } 2790ac27a0ecSDave Kleikamp 2791ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2792617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2793ac27a0ecSDave Kleikamp "and inode journals!\n"); 2794ac27a0ecSDave Kleikamp return -EINVAL; 2795ac27a0ecSDave Kleikamp } 2796ac27a0ecSDave Kleikamp 2797ac27a0ecSDave Kleikamp if (journal_inum) { 2798617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2799ac27a0ecSDave Kleikamp return -EINVAL; 2800ac27a0ecSDave Kleikamp } else { 2801617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2802ac27a0ecSDave Kleikamp return -EINVAL; 2803ac27a0ecSDave Kleikamp } 2804ac27a0ecSDave Kleikamp 28054776004fSTheodore Ts'o if (journal->j_flags & JBD2_BARRIER) 28064776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers enabled\n"); 28074776004fSTheodore Ts'o else 28084776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers disabled\n"); 28094776004fSTheodore Ts'o 2810ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2811dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2812ac27a0ecSDave Kleikamp if (err) { 2813617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2814dab291afSMingming Cao jbd2_journal_destroy(journal); 2815ac27a0ecSDave Kleikamp return err; 2816ac27a0ecSDave Kleikamp } 2817ac27a0ecSDave Kleikamp } 2818ac27a0ecSDave Kleikamp 2819617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2820dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2821ac27a0ecSDave Kleikamp if (!err) 2822dab291afSMingming Cao err = jbd2_journal_load(journal); 2823ac27a0ecSDave Kleikamp 2824ac27a0ecSDave Kleikamp if (err) { 2825617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2826dab291afSMingming Cao jbd2_journal_destroy(journal); 2827ac27a0ecSDave Kleikamp return err; 2828ac27a0ecSDave Kleikamp } 2829ac27a0ecSDave Kleikamp 2830617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2831617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2832ac27a0ecSDave Kleikamp 2833ac27a0ecSDave Kleikamp if (journal_devnum && 2834ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2835ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2836ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2837ac27a0ecSDave Kleikamp 2838ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2839617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2840ac27a0ecSDave Kleikamp } 2841ac27a0ecSDave Kleikamp 2842ac27a0ecSDave Kleikamp return 0; 2843ac27a0ecSDave Kleikamp } 2844ac27a0ecSDave Kleikamp 2845617ba13bSMingming Cao static int ext4_create_journal(struct super_block *sb, 2846617ba13bSMingming Cao struct ext4_super_block *es, 2847ac27a0ecSDave Kleikamp unsigned int journal_inum) 2848ac27a0ecSDave Kleikamp { 2849ac27a0ecSDave Kleikamp journal_t *journal; 28506c675bd4SBorislav Petkov int err; 2851ac27a0ecSDave Kleikamp 2852ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2853617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " 2854ac27a0ecSDave Kleikamp "create journal.\n"); 2855ac27a0ecSDave Kleikamp return -EROFS; 2856ac27a0ecSDave Kleikamp } 2857ac27a0ecSDave Kleikamp 28586c675bd4SBorislav Petkov journal = ext4_get_journal(sb, journal_inum); 28596c675bd4SBorislav Petkov if (!journal) 2860ac27a0ecSDave Kleikamp return -EINVAL; 2861ac27a0ecSDave Kleikamp 2862617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", 2863ac27a0ecSDave Kleikamp journal_inum); 2864ac27a0ecSDave Kleikamp 28656c675bd4SBorislav Petkov err = jbd2_journal_create(journal); 28666c675bd4SBorislav Petkov if (err) { 2867617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error creating journal.\n"); 2868dab291afSMingming Cao jbd2_journal_destroy(journal); 2869ac27a0ecSDave Kleikamp return -EIO; 2870ac27a0ecSDave Kleikamp } 2871ac27a0ecSDave Kleikamp 2872617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2873ac27a0ecSDave Kleikamp 2874617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 2875617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2876617ba13bSMingming Cao EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); 2877ac27a0ecSDave Kleikamp 2878ac27a0ecSDave Kleikamp es->s_journal_inum = cpu_to_le32(journal_inum); 2879ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2880ac27a0ecSDave Kleikamp 2881ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2882617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2883ac27a0ecSDave Kleikamp 2884ac27a0ecSDave Kleikamp return 0; 2885ac27a0ecSDave Kleikamp } 2886ac27a0ecSDave Kleikamp 2887617ba13bSMingming Cao static void ext4_commit_super(struct super_block *sb, 28882b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync) 2889ac27a0ecSDave Kleikamp { 2890617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2891ac27a0ecSDave Kleikamp 2892ac27a0ecSDave Kleikamp if (!sbh) 2893ac27a0ecSDave Kleikamp return; 2894914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 2895914258bfSTheodore Ts'o /* 2896914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 2897914258bfSTheodore Ts'o * superblock failed. This could happen because the 2898914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 2899914258bfSTheodore Ts'o * be a transient write error and maybe the block will 2900914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 2901914258bfSTheodore Ts'o * write and hope for the best. 2902914258bfSTheodore Ts'o */ 2903914258bfSTheodore Ts'o printk(KERN_ERR "ext4: previous I/O error to " 2904914258bfSTheodore Ts'o "superblock detected for %s.\n", sb->s_id); 2905914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 2906914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 2907914258bfSTheodore Ts'o } 2908ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 2909*5d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 2910*5d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 2911*5d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 2912*5d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 2913*5d1b1b3fSAneesh Kumar K.V 2914ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2915ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2916914258bfSTheodore Ts'o if (sync) { 2917ac27a0ecSDave Kleikamp sync_dirty_buffer(sbh); 2918914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 2919914258bfSTheodore Ts'o printk(KERN_ERR "ext4: I/O error while writing " 2920914258bfSTheodore Ts'o "superblock for %s.\n", sb->s_id); 2921914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 2922914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 2923914258bfSTheodore Ts'o } 2924914258bfSTheodore Ts'o } 2925ac27a0ecSDave Kleikamp } 2926ac27a0ecSDave Kleikamp 2927ac27a0ecSDave Kleikamp 2928ac27a0ecSDave Kleikamp /* 2929ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2930ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2931ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2932ac27a0ecSDave Kleikamp */ 2933617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 2934617ba13bSMingming Cao struct ext4_super_block *es) 2935ac27a0ecSDave Kleikamp { 2936617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2937ac27a0ecSDave Kleikamp 29380390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 29390390131bSFrank Mayhar BUG_ON(journal != NULL); 29400390131bSFrank Mayhar return; 29410390131bSFrank Mayhar } 2942dab291afSMingming Cao jbd2_journal_lock_updates(journal); 29437ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 29447ffe1ea8SHidehiro Kawai goto out; 29457ffe1ea8SHidehiro Kawai 294632c37730SJan Kara lock_super(sb); 2947617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2948ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2949617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2950ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2951617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2952ac27a0ecSDave Kleikamp } 295332c37730SJan Kara unlock_super(sb); 29547ffe1ea8SHidehiro Kawai 29557ffe1ea8SHidehiro Kawai out: 2956dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2957ac27a0ecSDave Kleikamp } 2958ac27a0ecSDave Kleikamp 2959ac27a0ecSDave Kleikamp /* 2960ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2961ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2962ac27a0ecSDave Kleikamp * main filesystem now. 2963ac27a0ecSDave Kleikamp */ 2964617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 2965617ba13bSMingming Cao struct ext4_super_block *es) 2966ac27a0ecSDave Kleikamp { 2967ac27a0ecSDave Kleikamp journal_t *journal; 2968ac27a0ecSDave Kleikamp int j_errno; 2969ac27a0ecSDave Kleikamp const char *errstr; 2970ac27a0ecSDave Kleikamp 29710390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 29720390131bSFrank Mayhar 2973617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2974ac27a0ecSDave Kleikamp 2975ac27a0ecSDave Kleikamp /* 2976ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 2977617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 2978ac27a0ecSDave Kleikamp */ 2979ac27a0ecSDave Kleikamp 2980dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 2981ac27a0ecSDave Kleikamp if (j_errno) { 2982ac27a0ecSDave Kleikamp char nbuf[16]; 2983ac27a0ecSDave Kleikamp 2984617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 298546e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 2986ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 298746e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 2988ac27a0ecSDave Kleikamp "filesystem check."); 2989ac27a0ecSDave Kleikamp 2990617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2991617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2992617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2993ac27a0ecSDave Kleikamp 2994dab291afSMingming Cao jbd2_journal_clear_err(journal); 2995ac27a0ecSDave Kleikamp } 2996ac27a0ecSDave Kleikamp } 2997ac27a0ecSDave Kleikamp 2998ac27a0ecSDave Kleikamp /* 2999ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3000ac27a0ecSDave Kleikamp * and wait on the commit. 3001ac27a0ecSDave Kleikamp */ 3002617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3003ac27a0ecSDave Kleikamp { 3004ac27a0ecSDave Kleikamp journal_t *journal; 30050390131bSFrank Mayhar int ret = 0; 3006ac27a0ecSDave Kleikamp 3007ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3008ac27a0ecSDave Kleikamp return 0; 3009ac27a0ecSDave Kleikamp 3010617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 30110390131bSFrank Mayhar if (journal) { 3012ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3013617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 30140390131bSFrank Mayhar } 30150390131bSFrank Mayhar 3016ac27a0ecSDave Kleikamp return ret; 3017ac27a0ecSDave Kleikamp } 3018ac27a0ecSDave Kleikamp 3019ac27a0ecSDave Kleikamp /* 3020617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 3021ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 302214ce0cb4STheodore Ts'o * point. (We can probably nuke this function altogether, and remove 302314ce0cb4STheodore Ts'o * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) 3024ac27a0ecSDave Kleikamp */ 3025617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3026ac27a0ecSDave Kleikamp { 30270390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 3028ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 3029ac27a0ecSDave Kleikamp BUG(); 3030ac27a0ecSDave Kleikamp sb->s_dirt = 0; 30310390131bSFrank Mayhar } else { 30320390131bSFrank Mayhar ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 30330390131bSFrank Mayhar } 3034ac27a0ecSDave Kleikamp } 3035ac27a0ecSDave Kleikamp 3036617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3037ac27a0ecSDave Kleikamp { 303814ce0cb4STheodore Ts'o int ret = 0; 3039ac27a0ecSDave Kleikamp 3040ede86cc4STheodore Ts'o trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); 3041ac27a0ecSDave Kleikamp sb->s_dirt = 0; 30420390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 3043ac27a0ecSDave Kleikamp if (wait) 304414ce0cb4STheodore Ts'o ret = ext4_force_commit(sb); 304514ce0cb4STheodore Ts'o else 304614ce0cb4STheodore Ts'o jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, NULL); 30470390131bSFrank Mayhar } else { 30480390131bSFrank Mayhar ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); 30490390131bSFrank Mayhar } 305014ce0cb4STheodore Ts'o return ret; 3051ac27a0ecSDave Kleikamp } 3052ac27a0ecSDave Kleikamp 3053ac27a0ecSDave Kleikamp /* 3054ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3055ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3056ac27a0ecSDave Kleikamp */ 3057617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb) 3058ac27a0ecSDave Kleikamp { 3059ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3060ac27a0ecSDave Kleikamp 3061ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 3062617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3063ac27a0ecSDave Kleikamp 30640390131bSFrank Mayhar if (journal) { 3065ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3066dab291afSMingming Cao jbd2_journal_lock_updates(journal); 30677ffe1ea8SHidehiro Kawai 30687ffe1ea8SHidehiro Kawai /* 30690390131bSFrank Mayhar * We don't want to clear needs_recovery flag when we 30700390131bSFrank Mayhar * failed to flush the journal. 30717ffe1ea8SHidehiro Kawai */ 30727ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 30737ffe1ea8SHidehiro Kawai return; 30740390131bSFrank Mayhar } 3075ac27a0ecSDave Kleikamp 3076ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3077617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3078617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3079ac27a0ecSDave Kleikamp } 3080ac27a0ecSDave Kleikamp } 3081ac27a0ecSDave Kleikamp 3082ac27a0ecSDave Kleikamp /* 3083ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3084ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3085ac27a0ecSDave Kleikamp */ 3086617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb) 3087ac27a0ecSDave Kleikamp { 30880390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { 3089ac27a0ecSDave Kleikamp lock_super(sb); 3090ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 3091617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3092617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3093ac27a0ecSDave Kleikamp unlock_super(sb); 3094dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3095ac27a0ecSDave Kleikamp } 3096ac27a0ecSDave Kleikamp } 3097ac27a0ecSDave Kleikamp 3098617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3099ac27a0ecSDave Kleikamp { 3100617ba13bSMingming Cao struct ext4_super_block *es; 3101617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3102617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3103ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3104617ba13bSMingming Cao struct ext4_mount_options old_opts; 31058a266467STheodore Ts'o ext4_group_t g; 3106ac27a0ecSDave Kleikamp int err; 3107ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3108ac27a0ecSDave Kleikamp int i; 3109ac27a0ecSDave Kleikamp #endif 3110ac27a0ecSDave Kleikamp 3111ac27a0ecSDave Kleikamp /* Store the original options */ 3112ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3113ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3114ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3115ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3116ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 311730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 311830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3119ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3120ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3121ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3122ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3123ac27a0ecSDave Kleikamp #endif 3124ac27a0ecSDave Kleikamp 3125ac27a0ecSDave Kleikamp /* 3126ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3127ac27a0ecSDave Kleikamp */ 3128ac27a0ecSDave Kleikamp if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { 3129ac27a0ecSDave Kleikamp err = -EINVAL; 3130ac27a0ecSDave Kleikamp goto restore_opts; 3131ac27a0ecSDave Kleikamp } 3132ac27a0ecSDave Kleikamp 3133617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 313446e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3135ac27a0ecSDave Kleikamp 3136ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3137617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3138ac27a0ecSDave Kleikamp 3139ac27a0ecSDave Kleikamp es = sbi->s_es; 3140ac27a0ecSDave Kleikamp 31410390131bSFrank Mayhar if (sbi->s_journal) 3142617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3143ac27a0ecSDave Kleikamp 3144ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3145bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 3146617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 3147ac27a0ecSDave Kleikamp err = -EROFS; 3148ac27a0ecSDave Kleikamp goto restore_opts; 3149ac27a0ecSDave Kleikamp } 3150ac27a0ecSDave Kleikamp 3151ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3152ac27a0ecSDave Kleikamp /* 3153ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3154ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3155ac27a0ecSDave Kleikamp */ 3156ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3157ac27a0ecSDave Kleikamp 3158ac27a0ecSDave Kleikamp /* 3159ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3160ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3161ac27a0ecSDave Kleikamp * mark the partition as valid again. 3162ac27a0ecSDave Kleikamp */ 3163617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3164617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3165ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3166ac27a0ecSDave Kleikamp 316732c37730SJan Kara /* 316832c37730SJan Kara * We have to unlock super so that we can wait for 316932c37730SJan Kara * transactions. 317032c37730SJan Kara */ 31710390131bSFrank Mayhar if (sbi->s_journal) { 317232c37730SJan Kara unlock_super(sb); 3173617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 317432c37730SJan Kara lock_super(sb); 31750390131bSFrank Mayhar } 3176ac27a0ecSDave Kleikamp } else { 31773a06d778SAneesh Kumar K.V int ret; 3178617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3179617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 3180617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3181ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 31823a06d778SAneesh Kumar K.V "optional features (%x).\n", sb->s_id, 31833a06d778SAneesh Kumar K.V (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & 31843a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3185ac27a0ecSDave Kleikamp err = -EROFS; 3186ac27a0ecSDave Kleikamp goto restore_opts; 3187ac27a0ecSDave Kleikamp } 3188ead6596bSEric Sandeen 3189ead6596bSEric Sandeen /* 31908a266467STheodore Ts'o * Make sure the group descriptor checksums 31918a266467STheodore Ts'o * are sane. If they aren't, refuse to 31928a266467STheodore Ts'o * remount r/w. 31938a266467STheodore Ts'o */ 31948a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 31958a266467STheodore Ts'o struct ext4_group_desc *gdp = 31968a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 31978a266467STheodore Ts'o 31988a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 31998a266467STheodore Ts'o printk(KERN_ERR 32008a266467STheodore Ts'o "EXT4-fs: ext4_remount: " 3201a9df9a49STheodore Ts'o "Checksum for group %u failed (%u!=%u)\n", 32028a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 32038a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 32048a266467STheodore Ts'o err = -EINVAL; 32058a266467STheodore Ts'o goto restore_opts; 32068a266467STheodore Ts'o } 32078a266467STheodore Ts'o } 32088a266467STheodore Ts'o 32098a266467STheodore Ts'o /* 3210ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3211ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3212ead6596bSEric Sandeen * require a full umount/remount for now. 3213ead6596bSEric Sandeen */ 3214ead6596bSEric Sandeen if (es->s_last_orphan) { 3215ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3216ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3217ead6596bSEric Sandeen "orphan inode list. Please " 3218ead6596bSEric Sandeen "umount/remount instead.\n", 3219ead6596bSEric Sandeen sb->s_id); 3220ead6596bSEric Sandeen err = -EINVAL; 3221ead6596bSEric Sandeen goto restore_opts; 3222ead6596bSEric Sandeen } 3223ead6596bSEric Sandeen 3224ac27a0ecSDave Kleikamp /* 3225ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3226ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3227ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3228ac27a0ecSDave Kleikamp * the partition.) 3229ac27a0ecSDave Kleikamp */ 32300390131bSFrank Mayhar if (sbi->s_journal) 3231617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3232ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3233617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3234ac27a0ecSDave Kleikamp goto restore_opts; 3235617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3236ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3237ac27a0ecSDave Kleikamp } 3238ac27a0ecSDave Kleikamp } 32390390131bSFrank Mayhar if (sbi->s_journal == NULL) 32400390131bSFrank Mayhar ext4_commit_super(sb, es, 1); 32410390131bSFrank Mayhar 3242ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3243ac27a0ecSDave Kleikamp /* Release old quota file names */ 3244ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3245ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3246ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3247ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3248ac27a0ecSDave Kleikamp #endif 3249ac27a0ecSDave Kleikamp return 0; 3250ac27a0ecSDave Kleikamp restore_opts: 3251ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3252ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3253ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3254ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3255ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 325630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 325730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3258ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3259ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3260ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3261ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3262ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3263ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3264ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3265ac27a0ecSDave Kleikamp } 3266ac27a0ecSDave Kleikamp #endif 3267ac27a0ecSDave Kleikamp return err; 3268ac27a0ecSDave Kleikamp } 3269ac27a0ecSDave Kleikamp 3270617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3271ac27a0ecSDave Kleikamp { 3272ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3273617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3274617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3275960cc398SPekka Enberg u64 fsid; 3276ac27a0ecSDave Kleikamp 32775e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 32785e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 32796bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 3280fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count, i; 32815e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3282ac27a0ecSDave Kleikamp smp_rmb(); 3283ac27a0ecSDave Kleikamp 3284ac27a0ecSDave Kleikamp /* 32855e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 32865e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 32875e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3288ac27a0ecSDave Kleikamp */ 3289ac27a0ecSDave Kleikamp 3290ac27a0ecSDave Kleikamp /* 3291ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3292ac27a0ecSDave Kleikamp * overhead 3293ac27a0ecSDave Kleikamp */ 3294ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3295ac27a0ecSDave Kleikamp 3296ac27a0ecSDave Kleikamp /* 3297ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3298ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3299ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3300ac27a0ecSDave Kleikamp */ 3301ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3302617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3303617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3304ac27a0ecSDave Kleikamp cond_resched(); 3305ac27a0ecSDave Kleikamp } 3306ac27a0ecSDave Kleikamp 3307ac27a0ecSDave Kleikamp /* 3308ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3309ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3310ac27a0ecSDave Kleikamp */ 33115e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 33125e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 33135e70030dSBadari Pulavarty smp_wmb(); 33146bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3315ac27a0ecSDave Kleikamp } 3316ac27a0ecSDave Kleikamp 3317617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3318ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 33195e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 33206bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 33216bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3322308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3323bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3324bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3325ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3326ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 332752d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 33285e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3329617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3330960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3331960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3332960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3333960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 3334ac27a0ecSDave Kleikamp return 0; 3335ac27a0ecSDave Kleikamp } 3336ac27a0ecSDave Kleikamp 3337ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 3338ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 3339ac27a0ecSDave Kleikamp * Process 1 Process 2 3340617ba13bSMingming Cao * ext4_create() quota_sync() 3341dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3342ac27a0ecSDave Kleikamp * DQUOT_INIT() down(dqio_mutex) 3343dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3344ac27a0ecSDave Kleikamp * 3345ac27a0ecSDave Kleikamp */ 3346ac27a0ecSDave Kleikamp 3347ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3348ac27a0ecSDave Kleikamp 3349ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3350ac27a0ecSDave Kleikamp { 3351ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3352ac27a0ecSDave Kleikamp } 3353ac27a0ecSDave Kleikamp 3354617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type) 3355ac27a0ecSDave Kleikamp { 3356ac27a0ecSDave Kleikamp handle_t *handle; 3357ac27a0ecSDave Kleikamp int ret, err; 3358ac27a0ecSDave Kleikamp 3359ac27a0ecSDave Kleikamp /* We may create quota structure so we need to reserve enough blocks */ 3360617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); 3361ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3362ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3363ac27a0ecSDave Kleikamp ret = dquot_initialize(inode, type); 3364617ba13bSMingming Cao err = ext4_journal_stop(handle); 3365ac27a0ecSDave Kleikamp if (!ret) 3366ac27a0ecSDave Kleikamp ret = err; 3367ac27a0ecSDave Kleikamp return ret; 3368ac27a0ecSDave Kleikamp } 3369ac27a0ecSDave Kleikamp 3370617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode) 3371ac27a0ecSDave Kleikamp { 3372ac27a0ecSDave Kleikamp handle_t *handle; 3373ac27a0ecSDave Kleikamp int ret, err; 3374ac27a0ecSDave Kleikamp 3375ac27a0ecSDave Kleikamp /* We may delete quota structure so we need to reserve enough blocks */ 3376617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); 33772887df13SJan Kara if (IS_ERR(handle)) { 33782887df13SJan Kara /* 33792887df13SJan Kara * We call dquot_drop() anyway to at least release references 33802887df13SJan Kara * to quota structures so that umount does not hang. 33812887df13SJan Kara */ 33822887df13SJan Kara dquot_drop(inode); 3383ac27a0ecSDave Kleikamp return PTR_ERR(handle); 33842887df13SJan Kara } 3385ac27a0ecSDave Kleikamp ret = dquot_drop(inode); 3386617ba13bSMingming Cao err = ext4_journal_stop(handle); 3387ac27a0ecSDave Kleikamp if (!ret) 3388ac27a0ecSDave Kleikamp ret = err; 3389ac27a0ecSDave Kleikamp return ret; 3390ac27a0ecSDave Kleikamp } 3391ac27a0ecSDave Kleikamp 3392617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3393ac27a0ecSDave Kleikamp { 3394ac27a0ecSDave Kleikamp int ret, err; 3395ac27a0ecSDave Kleikamp handle_t *handle; 3396ac27a0ecSDave Kleikamp struct inode *inode; 3397ac27a0ecSDave Kleikamp 3398ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3399617ba13bSMingming Cao handle = ext4_journal_start(inode, 3400617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3401ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3402ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3403ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3404617ba13bSMingming Cao err = ext4_journal_stop(handle); 3405ac27a0ecSDave Kleikamp if (!ret) 3406ac27a0ecSDave Kleikamp ret = err; 3407ac27a0ecSDave Kleikamp return ret; 3408ac27a0ecSDave Kleikamp } 3409ac27a0ecSDave Kleikamp 3410617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3411ac27a0ecSDave Kleikamp { 3412ac27a0ecSDave Kleikamp int ret, err; 3413ac27a0ecSDave Kleikamp handle_t *handle; 3414ac27a0ecSDave Kleikamp 3415617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3416617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3417ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3418ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3419ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3420617ba13bSMingming Cao err = ext4_journal_stop(handle); 3421ac27a0ecSDave Kleikamp if (!ret) 3422ac27a0ecSDave Kleikamp ret = err; 3423ac27a0ecSDave Kleikamp return ret; 3424ac27a0ecSDave Kleikamp } 3425ac27a0ecSDave Kleikamp 3426617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3427ac27a0ecSDave Kleikamp { 3428ac27a0ecSDave Kleikamp int ret, err; 3429ac27a0ecSDave Kleikamp handle_t *handle; 3430ac27a0ecSDave Kleikamp 3431617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3432617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 34339c3013e9SJan Kara if (IS_ERR(handle)) { 34349c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 34359c3013e9SJan Kara dquot_release(dquot); 3436ac27a0ecSDave Kleikamp return PTR_ERR(handle); 34379c3013e9SJan Kara } 3438ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3439617ba13bSMingming Cao err = ext4_journal_stop(handle); 3440ac27a0ecSDave Kleikamp if (!ret) 3441ac27a0ecSDave Kleikamp ret = err; 3442ac27a0ecSDave Kleikamp return ret; 3443ac27a0ecSDave Kleikamp } 3444ac27a0ecSDave Kleikamp 3445617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3446ac27a0ecSDave Kleikamp { 34472c8be6b2SJan Kara /* Are we journaling quotas? */ 3448617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3449617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3450ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3451617ba13bSMingming Cao return ext4_write_dquot(dquot); 3452ac27a0ecSDave Kleikamp } else { 3453ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3454ac27a0ecSDave Kleikamp } 3455ac27a0ecSDave Kleikamp } 3456ac27a0ecSDave Kleikamp 3457617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3458ac27a0ecSDave Kleikamp { 3459ac27a0ecSDave Kleikamp int ret, err; 3460ac27a0ecSDave Kleikamp handle_t *handle; 3461ac27a0ecSDave Kleikamp 3462ac27a0ecSDave Kleikamp /* Data block + inode block */ 3463617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3464ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3465ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3466ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3467617ba13bSMingming Cao err = ext4_journal_stop(handle); 3468ac27a0ecSDave Kleikamp if (!ret) 3469ac27a0ecSDave Kleikamp ret = err; 3470ac27a0ecSDave Kleikamp return ret; 3471ac27a0ecSDave Kleikamp } 3472ac27a0ecSDave Kleikamp 3473ac27a0ecSDave Kleikamp /* 3474ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3475ac27a0ecSDave Kleikamp * the quota file and such... 3476ac27a0ecSDave Kleikamp */ 3477617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3478ac27a0ecSDave Kleikamp { 3479617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3480617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3481ac27a0ecSDave Kleikamp } 3482ac27a0ecSDave Kleikamp 3483ac27a0ecSDave Kleikamp /* 3484ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3485ac27a0ecSDave Kleikamp */ 3486617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 34878264613dSAl Viro char *name, int remount) 3488ac27a0ecSDave Kleikamp { 3489ac27a0ecSDave Kleikamp int err; 34908264613dSAl Viro struct path path; 3491ac27a0ecSDave Kleikamp 3492ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3493ac27a0ecSDave Kleikamp return -EINVAL; 34948264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 34950623543bSJan Kara if (remount) 34968264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 34970623543bSJan Kara 34988264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3499ac27a0ecSDave Kleikamp if (err) 3500ac27a0ecSDave Kleikamp return err; 35010623543bSJan Kara 3502ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 35038264613dSAl Viro if (path.mnt->mnt_sb != sb) { 35048264613dSAl Viro path_put(&path); 3505ac27a0ecSDave Kleikamp return -EXDEV; 3506ac27a0ecSDave Kleikamp } 35070623543bSJan Kara /* Journaling quota? */ 35080623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 35092b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 35108264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3511ac27a0ecSDave Kleikamp printk(KERN_WARNING 3512617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 35130623543bSJan Kara "Journaled quota will not work.\n"); 35140623543bSJan Kara } 35150623543bSJan Kara 35160623543bSJan Kara /* 35170623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 35180623543bSJan Kara * all updates to the file when we bypass pagecache... 35190623543bSJan Kara */ 35200390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 35210390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 35220623543bSJan Kara /* 35230623543bSJan Kara * We don't need to lock updates but journal_flush() could 35240623543bSJan Kara * otherwise be livelocked... 35250623543bSJan Kara */ 35260623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 35277ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 35280623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 35297ffe1ea8SHidehiro Kawai if (err) { 35308264613dSAl Viro path_put(&path); 35317ffe1ea8SHidehiro Kawai return err; 35327ffe1ea8SHidehiro Kawai } 35330623543bSJan Kara } 35340623543bSJan Kara 35358264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 35368264613dSAl Viro path_put(&path); 353777e69dacSAl Viro return err; 3538ac27a0ecSDave Kleikamp } 3539ac27a0ecSDave Kleikamp 3540ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3541ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3542ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3543ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3544617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3545ac27a0ecSDave Kleikamp size_t len, loff_t off) 3546ac27a0ecSDave Kleikamp { 3547ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3548725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3549ac27a0ecSDave Kleikamp int err = 0; 3550ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3551ac27a0ecSDave Kleikamp int tocopy; 3552ac27a0ecSDave Kleikamp size_t toread; 3553ac27a0ecSDave Kleikamp struct buffer_head *bh; 3554ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3555ac27a0ecSDave Kleikamp 3556ac27a0ecSDave Kleikamp if (off > i_size) 3557ac27a0ecSDave Kleikamp return 0; 3558ac27a0ecSDave Kleikamp if (off+len > i_size) 3559ac27a0ecSDave Kleikamp len = i_size-off; 3560ac27a0ecSDave Kleikamp toread = len; 3561ac27a0ecSDave Kleikamp while (toread > 0) { 3562ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3563ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3564617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3565ac27a0ecSDave Kleikamp if (err) 3566ac27a0ecSDave Kleikamp return err; 3567ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3568ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3569ac27a0ecSDave Kleikamp else 3570ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3571ac27a0ecSDave Kleikamp brelse(bh); 3572ac27a0ecSDave Kleikamp offset = 0; 3573ac27a0ecSDave Kleikamp toread -= tocopy; 3574ac27a0ecSDave Kleikamp data += tocopy; 3575ac27a0ecSDave Kleikamp blk++; 3576ac27a0ecSDave Kleikamp } 3577ac27a0ecSDave Kleikamp return len; 3578ac27a0ecSDave Kleikamp } 3579ac27a0ecSDave Kleikamp 3580ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3581ac27a0ecSDave Kleikamp * enough credits) */ 3582617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3583ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3584ac27a0ecSDave Kleikamp { 3585ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3586725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3587ac27a0ecSDave Kleikamp int err = 0; 3588ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3589ac27a0ecSDave Kleikamp int tocopy; 3590617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3591ac27a0ecSDave Kleikamp size_t towrite = len; 3592ac27a0ecSDave Kleikamp struct buffer_head *bh; 3593ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3594ac27a0ecSDave Kleikamp 35950390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3596e5f8eab8STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" 35979c3013e9SJan Kara " cancelled because transaction is not started.\n", 35989c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 35999c3013e9SJan Kara return -EIO; 36009c3013e9SJan Kara } 3601ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3602ac27a0ecSDave Kleikamp while (towrite > 0) { 3603ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3604ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3605617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3606ac27a0ecSDave Kleikamp if (!bh) 3607ac27a0ecSDave Kleikamp goto out; 3608ac27a0ecSDave Kleikamp if (journal_quota) { 3609617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3610ac27a0ecSDave Kleikamp if (err) { 3611ac27a0ecSDave Kleikamp brelse(bh); 3612ac27a0ecSDave Kleikamp goto out; 3613ac27a0ecSDave Kleikamp } 3614ac27a0ecSDave Kleikamp } 3615ac27a0ecSDave Kleikamp lock_buffer(bh); 3616ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3617ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3618ac27a0ecSDave Kleikamp unlock_buffer(bh); 3619ac27a0ecSDave Kleikamp if (journal_quota) 36200390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 3621ac27a0ecSDave Kleikamp else { 3622ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3623678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3624ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3625ac27a0ecSDave Kleikamp } 3626ac27a0ecSDave Kleikamp brelse(bh); 3627ac27a0ecSDave Kleikamp if (err) 3628ac27a0ecSDave Kleikamp goto out; 3629ac27a0ecSDave Kleikamp offset = 0; 3630ac27a0ecSDave Kleikamp towrite -= tocopy; 3631ac27a0ecSDave Kleikamp data += tocopy; 3632ac27a0ecSDave Kleikamp blk++; 3633ac27a0ecSDave Kleikamp } 3634ac27a0ecSDave Kleikamp out: 36354d04e4fbSJan Kara if (len == towrite) { 36364d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3637ac27a0ecSDave Kleikamp return err; 36384d04e4fbSJan Kara } 3639ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3640ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3641617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3642ac27a0ecSDave Kleikamp } 3643ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3644617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3645ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3646ac27a0ecSDave Kleikamp return len - towrite; 3647ac27a0ecSDave Kleikamp } 3648ac27a0ecSDave Kleikamp 3649ac27a0ecSDave Kleikamp #endif 3650ac27a0ecSDave Kleikamp 3651617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 3652ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3653ac27a0ecSDave Kleikamp { 3654617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3655ac27a0ecSDave Kleikamp } 3656ac27a0ecSDave Kleikamp 36575e8814f2STheodore Ts'o #ifdef CONFIG_PROC_FS 36585e8814f2STheodore Ts'o static int ext4_ui_proc_show(struct seq_file *m, void *v) 36595e8814f2STheodore Ts'o { 36605e8814f2STheodore Ts'o unsigned int *p = m->private; 36615e8814f2STheodore Ts'o 36625e8814f2STheodore Ts'o seq_printf(m, "%u\n", *p); 36635e8814f2STheodore Ts'o return 0; 36645e8814f2STheodore Ts'o } 36655e8814f2STheodore Ts'o 36665e8814f2STheodore Ts'o static int ext4_ui_proc_open(struct inode *inode, struct file *file) 36675e8814f2STheodore Ts'o { 36685e8814f2STheodore Ts'o return single_open(file, ext4_ui_proc_show, PDE(inode)->data); 36695e8814f2STheodore Ts'o } 36705e8814f2STheodore Ts'o 36715e8814f2STheodore Ts'o static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf, 36725e8814f2STheodore Ts'o size_t cnt, loff_t *ppos) 36735e8814f2STheodore Ts'o { 367423475e26SRoel Kluin unsigned long *p = PDE(file->f_path.dentry->d_inode)->data; 36755e8814f2STheodore Ts'o char str[32]; 36765e8814f2STheodore Ts'o 36775e8814f2STheodore Ts'o if (cnt >= sizeof(str)) 36785e8814f2STheodore Ts'o return -EINVAL; 36795e8814f2STheodore Ts'o if (copy_from_user(str, buf, cnt)) 36805e8814f2STheodore Ts'o return -EFAULT; 368123475e26SRoel Kluin 368223475e26SRoel Kluin *p = simple_strtoul(str, NULL, 0); 36835e8814f2STheodore Ts'o return cnt; 36845e8814f2STheodore Ts'o } 36855e8814f2STheodore Ts'o 36865e8814f2STheodore Ts'o const struct file_operations ext4_ui_proc_fops = { 36875e8814f2STheodore Ts'o .owner = THIS_MODULE, 36885e8814f2STheodore Ts'o .open = ext4_ui_proc_open, 36895e8814f2STheodore Ts'o .read = seq_read, 36905e8814f2STheodore Ts'o .llseek = seq_lseek, 36915e8814f2STheodore Ts'o .release = single_release, 36925e8814f2STheodore Ts'o .write = ext4_ui_proc_write, 36935e8814f2STheodore Ts'o }; 36945e8814f2STheodore Ts'o #endif 36955e8814f2STheodore Ts'o 369603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 3697ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 369803010a33STheodore Ts'o .name = "ext4", 3699617ba13bSMingming Cao .get_sb = ext4_get_sb, 3700ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3701ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3702ac27a0ecSDave Kleikamp }; 3703ac27a0ecSDave Kleikamp 370403010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 370503010a33STheodore Ts'o static int ext4dev_get_sb(struct file_system_type *fs_type, 370603010a33STheodore Ts'o int flags, const char *dev_name, void *data, struct vfsmount *mnt) 370703010a33STheodore Ts'o { 370803010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Update your userspace programs " 370903010a33STheodore Ts'o "to mount using ext4\n"); 371003010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " 371103010a33STheodore Ts'o "will go away by 2.6.31\n"); 371203010a33STheodore Ts'o return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 371303010a33STheodore Ts'o } 371403010a33STheodore Ts'o 371503010a33STheodore Ts'o static struct file_system_type ext4dev_fs_type = { 371603010a33STheodore Ts'o .owner = THIS_MODULE, 371703010a33STheodore Ts'o .name = "ext4dev", 371803010a33STheodore Ts'o .get_sb = ext4dev_get_sb, 371903010a33STheodore Ts'o .kill_sb = kill_block_super, 372003010a33STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 372103010a33STheodore Ts'o }; 372203010a33STheodore Ts'o MODULE_ALIAS("ext4dev"); 372303010a33STheodore Ts'o #endif 372403010a33STheodore Ts'o 3725617ba13bSMingming Cao static int __init init_ext4_fs(void) 3726ac27a0ecSDave Kleikamp { 3727c9de560dSAlex Tomas int err; 3728c9de560dSAlex Tomas 37299f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 3730c9de560dSAlex Tomas err = init_ext4_mballoc(); 3731ac27a0ecSDave Kleikamp if (err) 3732ac27a0ecSDave Kleikamp return err; 3733c9de560dSAlex Tomas 3734c9de560dSAlex Tomas err = init_ext4_xattr(); 3735c9de560dSAlex Tomas if (err) 3736c9de560dSAlex Tomas goto out2; 3737ac27a0ecSDave Kleikamp err = init_inodecache(); 3738ac27a0ecSDave Kleikamp if (err) 3739ac27a0ecSDave Kleikamp goto out1; 374003010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 3741ac27a0ecSDave Kleikamp if (err) 3742ac27a0ecSDave Kleikamp goto out; 374303010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 374403010a33STheodore Ts'o err = register_filesystem(&ext4dev_fs_type); 374503010a33STheodore Ts'o if (err) { 374603010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 374703010a33STheodore Ts'o goto out; 374803010a33STheodore Ts'o } 374903010a33STheodore Ts'o #endif 3750ac27a0ecSDave Kleikamp return 0; 3751ac27a0ecSDave Kleikamp out: 3752ac27a0ecSDave Kleikamp destroy_inodecache(); 3753ac27a0ecSDave Kleikamp out1: 3754617ba13bSMingming Cao exit_ext4_xattr(); 3755c9de560dSAlex Tomas out2: 3756c9de560dSAlex Tomas exit_ext4_mballoc(); 3757ac27a0ecSDave Kleikamp return err; 3758ac27a0ecSDave Kleikamp } 3759ac27a0ecSDave Kleikamp 3760617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 3761ac27a0ecSDave Kleikamp { 376203010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 376303010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 3764617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 376503010a33STheodore Ts'o #endif 3766ac27a0ecSDave Kleikamp destroy_inodecache(); 3767617ba13bSMingming Cao exit_ext4_xattr(); 3768c9de560dSAlex Tomas exit_ext4_mballoc(); 37699f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 3770ac27a0ecSDave Kleikamp } 3771ac27a0ecSDave Kleikamp 3772ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 3773617ba13bSMingming Cao MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); 3774ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 3775617ba13bSMingming Cao module_init(init_ext4_fs) 3776617ba13bSMingming Cao module_exit(exit_ext4_fs) 3777