Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/ext3/super.c |
| 3 | * |
| 4 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 5 | * Remy Card (card@masi.ibp.fr) |
| 6 | * Laboratoire MASI - Institut Blaise Pascal |
| 7 | * Universite Pierre et Marie Curie (Paris VI) |
| 8 | * |
| 9 | * from |
| 10 | * |
| 11 | * linux/fs/minix/inode.c |
| 12 | * |
| 13 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 14 | * |
| 15 | * Big-endian to little-endian byte-swapping/bitmaps by |
| 16 | * David S. Miller (davem@caip.rutgers.edu), 1995 |
| 17 | */ |
| 18 | |
| 19 | #include <linux/config.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/string.h> |
| 22 | #include <linux/fs.h> |
| 23 | #include <linux/time.h> |
| 24 | #include <linux/jbd.h> |
| 25 | #include <linux/ext3_fs.h> |
| 26 | #include <linux/ext3_jbd.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/blkdev.h> |
| 30 | #include <linux/parser.h> |
| 31 | #include <linux/smp_lock.h> |
| 32 | #include <linux/buffer_head.h> |
| 33 | #include <linux/vfs.h> |
| 34 | #include <linux/random.h> |
| 35 | #include <linux/mount.h> |
| 36 | #include <linux/namei.h> |
| 37 | #include <linux/quotaops.h> |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 38 | #include <linux/seq_file.h> |
Ben Dooks | 381be25 | 2005-10-30 15:02:56 -0800 | [diff] [blame] | 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <asm/uaccess.h> |
Ben Dooks | 381be25 | 2005-10-30 15:02:56 -0800 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include "xattr.h" |
| 43 | #include "acl.h" |
Ben Dooks | 381be25 | 2005-10-30 15:02:56 -0800 | [diff] [blame] | 44 | #include "namei.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 46 | static int ext3_load_journal(struct super_block *, struct ext3_super_block *, |
| 47 | unsigned long journal_devnum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | static int ext3_create_journal(struct super_block *, struct ext3_super_block *, |
| 49 | int); |
| 50 | static void ext3_commit_super (struct super_block * sb, |
| 51 | struct ext3_super_block * es, |
| 52 | int sync); |
| 53 | static void ext3_mark_recovery_complete(struct super_block * sb, |
| 54 | struct ext3_super_block * es); |
| 55 | static void ext3_clear_journal_err(struct super_block * sb, |
| 56 | struct ext3_super_block * es); |
| 57 | static int ext3_sync_fs(struct super_block *sb, int wait); |
| 58 | static const char *ext3_decode_error(struct super_block * sb, int errno, |
| 59 | char nbuf[16]); |
| 60 | static int ext3_remount (struct super_block * sb, int * flags, char * data); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 61 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | static void ext3_unlockfs(struct super_block *sb); |
| 63 | static void ext3_write_super (struct super_block * sb); |
| 64 | static void ext3_write_super_lockfs(struct super_block *sb); |
| 65 | |
| 66 | /* |
| 67 | * Wrappers for journal_start/end. |
| 68 | * |
| 69 | * The only special thing we need to do here is to make sure that all |
| 70 | * journal_end calls result in the superblock being marked dirty, so |
| 71 | * that sync() will call the filesystem's write_super callback if |
| 72 | * appropriate. |
| 73 | */ |
| 74 | handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks) |
| 75 | { |
| 76 | journal_t *journal; |
| 77 | |
| 78 | if (sb->s_flags & MS_RDONLY) |
| 79 | return ERR_PTR(-EROFS); |
| 80 | |
| 81 | /* Special case here: if the journal has aborted behind our |
| 82 | * backs (eg. EIO in the commit thread), then we still need to |
| 83 | * take the FS itself readonly cleanly. */ |
| 84 | journal = EXT3_SB(sb)->s_journal; |
| 85 | if (is_journal_aborted(journal)) { |
| 86 | ext3_abort(sb, __FUNCTION__, |
| 87 | "Detected aborted journal"); |
| 88 | return ERR_PTR(-EROFS); |
| 89 | } |
| 90 | |
| 91 | return journal_start(journal, nblocks); |
| 92 | } |
| 93 | |
| 94 | /* |
| 95 | * The only special thing we need to do here is to make sure that all |
| 96 | * journal_stop calls result in the superblock being marked dirty, so |
| 97 | * that sync() will call the filesystem's write_super callback if |
| 98 | * appropriate. |
| 99 | */ |
| 100 | int __ext3_journal_stop(const char *where, handle_t *handle) |
| 101 | { |
| 102 | struct super_block *sb; |
| 103 | int err; |
| 104 | int rc; |
| 105 | |
| 106 | sb = handle->h_transaction->t_journal->j_private; |
| 107 | err = handle->h_err; |
| 108 | rc = journal_stop(handle); |
| 109 | |
| 110 | if (!err) |
| 111 | err = rc; |
| 112 | if (err) |
| 113 | __ext3_std_error(sb, where, err); |
| 114 | return err; |
| 115 | } |
| 116 | |
| 117 | void ext3_journal_abort_handle(const char *caller, const char *err_fn, |
| 118 | struct buffer_head *bh, handle_t *handle, int err) |
| 119 | { |
| 120 | char nbuf[16]; |
| 121 | const char *errstr = ext3_decode_error(NULL, err, nbuf); |
| 122 | |
| 123 | if (bh) |
| 124 | BUFFER_TRACE(bh, "abort"); |
| 125 | |
| 126 | if (!handle->h_err) |
| 127 | handle->h_err = err; |
| 128 | |
| 129 | if (is_handle_aborted(handle)) |
| 130 | return; |
| 131 | |
| 132 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", |
| 133 | caller, errstr, err_fn); |
| 134 | |
| 135 | journal_abort_handle(handle); |
| 136 | } |
| 137 | |
| 138 | /* Deal with the reporting of failure conditions on a filesystem such as |
| 139 | * inconsistencies detected or read IO failures. |
| 140 | * |
| 141 | * On ext2, we can store the error state of the filesystem in the |
| 142 | * superblock. That is not possible on ext3, because we may have other |
| 143 | * write ordering constraints on the superblock which prevent us from |
| 144 | * writing it out straight away; and given that the journal is about to |
| 145 | * be aborted, we can't rely on the current, or future, transactions to |
| 146 | * write out the superblock safely. |
| 147 | * |
| 148 | * We'll just use the journal_abort() error code to record an error in |
| 149 | * the journal instead. On recovery, the journal will compain about |
| 150 | * that error until we've noted it down and cleared it. |
| 151 | */ |
| 152 | |
| 153 | static void ext3_handle_error(struct super_block *sb) |
| 154 | { |
| 155 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; |
| 156 | |
| 157 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; |
| 158 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); |
| 159 | |
| 160 | if (sb->s_flags & MS_RDONLY) |
| 161 | return; |
| 162 | |
| 163 | if (test_opt (sb, ERRORS_RO)) { |
| 164 | printk (KERN_CRIT "Remounting filesystem read-only\n"); |
| 165 | sb->s_flags |= MS_RDONLY; |
| 166 | } else { |
| 167 | journal_t *journal = EXT3_SB(sb)->s_journal; |
| 168 | |
| 169 | EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT; |
| 170 | if (journal) |
| 171 | journal_abort(journal, -EIO); |
| 172 | } |
| 173 | if (test_opt(sb, ERRORS_PANIC)) |
| 174 | panic("EXT3-fs (device %s): panic forced after error\n", |
| 175 | sb->s_id); |
| 176 | ext3_commit_super(sb, es, 1); |
| 177 | } |
| 178 | |
| 179 | void ext3_error (struct super_block * sb, const char * function, |
| 180 | const char * fmt, ...) |
| 181 | { |
| 182 | va_list args; |
| 183 | |
| 184 | va_start(args, fmt); |
| 185 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); |
| 186 | vprintk(fmt, args); |
| 187 | printk("\n"); |
| 188 | va_end(args); |
| 189 | |
| 190 | ext3_handle_error(sb); |
| 191 | } |
| 192 | |
| 193 | static const char *ext3_decode_error(struct super_block * sb, int errno, |
| 194 | char nbuf[16]) |
| 195 | { |
| 196 | char *errstr = NULL; |
| 197 | |
| 198 | switch (errno) { |
| 199 | case -EIO: |
| 200 | errstr = "IO failure"; |
| 201 | break; |
| 202 | case -ENOMEM: |
| 203 | errstr = "Out of memory"; |
| 204 | break; |
| 205 | case -EROFS: |
| 206 | if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT) |
| 207 | errstr = "Journal has aborted"; |
| 208 | else |
| 209 | errstr = "Readonly filesystem"; |
| 210 | break; |
| 211 | default: |
| 212 | /* If the caller passed in an extra buffer for unknown |
| 213 | * errors, textualise them now. Else we just return |
| 214 | * NULL. */ |
| 215 | if (nbuf) { |
| 216 | /* Check for truncated error codes... */ |
| 217 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) |
| 218 | errstr = nbuf; |
| 219 | } |
| 220 | break; |
| 221 | } |
| 222 | |
| 223 | return errstr; |
| 224 | } |
| 225 | |
| 226 | /* __ext3_std_error decodes expected errors from journaling functions |
| 227 | * automatically and invokes the appropriate error response. */ |
| 228 | |
| 229 | void __ext3_std_error (struct super_block * sb, const char * function, |
| 230 | int errno) |
| 231 | { |
| 232 | char nbuf[16]; |
Stephen Tweedie | 3012162 | 2005-05-18 11:47:17 -0400 | [diff] [blame] | 233 | const char *errstr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Stephen Tweedie | 3012162 | 2005-05-18 11:47:17 -0400 | [diff] [blame] | 235 | /* Special case: if the error is EROFS, and we're not already |
| 236 | * inside a transaction, then there's really no point in logging |
| 237 | * an error. */ |
| 238 | if (errno == -EROFS && journal_current_handle() == NULL && |
| 239 | (sb->s_flags & MS_RDONLY)) |
| 240 | return; |
| 241 | |
| 242 | errstr = ext3_decode_error(sb, errno, nbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n", |
| 244 | sb->s_id, function, errstr); |
| 245 | |
| 246 | ext3_handle_error(sb); |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * ext3_abort is a much stronger failure handler than ext3_error. The |
| 251 | * abort function may be used to deal with unrecoverable failures such |
| 252 | * as journal IO errors or ENOMEM at a critical moment in log management. |
| 253 | * |
| 254 | * We unconditionally force the filesystem into an ABORT|READONLY state, |
| 255 | * unless the error response on the fs has been set to panic in which |
| 256 | * case we take the easy way out and panic immediately. |
| 257 | */ |
| 258 | |
| 259 | void ext3_abort (struct super_block * sb, const char * function, |
| 260 | const char * fmt, ...) |
| 261 | { |
| 262 | va_list args; |
| 263 | |
| 264 | printk (KERN_CRIT "ext3_abort called.\n"); |
| 265 | |
| 266 | va_start(args, fmt); |
| 267 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); |
| 268 | vprintk(fmt, args); |
| 269 | printk("\n"); |
| 270 | va_end(args); |
| 271 | |
| 272 | if (test_opt(sb, ERRORS_PANIC)) |
| 273 | panic("EXT3-fs panic from previous error\n"); |
| 274 | |
| 275 | if (sb->s_flags & MS_RDONLY) |
| 276 | return; |
| 277 | |
| 278 | printk(KERN_CRIT "Remounting filesystem read-only\n"); |
| 279 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; |
| 280 | sb->s_flags |= MS_RDONLY; |
| 281 | EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT; |
| 282 | journal_abort(EXT3_SB(sb)->s_journal, -EIO); |
| 283 | } |
| 284 | |
| 285 | void ext3_warning (struct super_block * sb, const char * function, |
| 286 | const char * fmt, ...) |
| 287 | { |
| 288 | va_list args; |
| 289 | |
| 290 | va_start(args, fmt); |
| 291 | printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ", |
| 292 | sb->s_id, function); |
| 293 | vprintk(fmt, args); |
| 294 | printk("\n"); |
| 295 | va_end(args); |
| 296 | } |
| 297 | |
| 298 | void ext3_update_dynamic_rev(struct super_block *sb) |
| 299 | { |
| 300 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; |
| 301 | |
| 302 | if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV) |
| 303 | return; |
| 304 | |
| 305 | ext3_warning(sb, __FUNCTION__, |
| 306 | "updating to rev %d because of new feature flag, " |
| 307 | "running e2fsck is recommended", |
| 308 | EXT3_DYNAMIC_REV); |
| 309 | |
| 310 | es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO); |
| 311 | es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE); |
| 312 | es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV); |
| 313 | /* leave es->s_feature_*compat flags alone */ |
| 314 | /* es->s_uuid will be set by e2fsck if empty */ |
| 315 | |
| 316 | /* |
| 317 | * The rest of the superblock fields should be zero, and if not it |
| 318 | * means they are likely already in use, so leave them alone. We |
| 319 | * can leave it up to e2fsck to clean up any inconsistencies there. |
| 320 | */ |
| 321 | } |
| 322 | |
| 323 | /* |
| 324 | * Open the external journal device |
| 325 | */ |
| 326 | static struct block_device *ext3_blkdev_get(dev_t dev) |
| 327 | { |
| 328 | struct block_device *bdev; |
| 329 | char b[BDEVNAME_SIZE]; |
| 330 | |
| 331 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); |
| 332 | if (IS_ERR(bdev)) |
| 333 | goto fail; |
| 334 | return bdev; |
| 335 | |
| 336 | fail: |
| 337 | printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n", |
| 338 | __bdevname(dev, b), PTR_ERR(bdev)); |
| 339 | return NULL; |
| 340 | } |
| 341 | |
| 342 | /* |
| 343 | * Release the journal device |
| 344 | */ |
| 345 | static int ext3_blkdev_put(struct block_device *bdev) |
| 346 | { |
| 347 | bd_release(bdev); |
| 348 | return blkdev_put(bdev); |
| 349 | } |
| 350 | |
| 351 | static int ext3_blkdev_remove(struct ext3_sb_info *sbi) |
| 352 | { |
| 353 | struct block_device *bdev; |
| 354 | int ret = -ENODEV; |
| 355 | |
| 356 | bdev = sbi->journal_bdev; |
| 357 | if (bdev) { |
| 358 | ret = ext3_blkdev_put(bdev); |
| 359 | sbi->journal_bdev = NULL; |
| 360 | } |
| 361 | return ret; |
| 362 | } |
| 363 | |
| 364 | static inline struct inode *orphan_list_entry(struct list_head *l) |
| 365 | { |
| 366 | return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode; |
| 367 | } |
| 368 | |
| 369 | static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi) |
| 370 | { |
| 371 | struct list_head *l; |
| 372 | |
| 373 | printk(KERN_ERR "sb orphan head is %d\n", |
| 374 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
| 375 | |
| 376 | printk(KERN_ERR "sb_info orphan list:\n"); |
| 377 | list_for_each(l, &sbi->s_orphan) { |
| 378 | struct inode *inode = orphan_list_entry(l); |
| 379 | printk(KERN_ERR " " |
| 380 | "inode %s:%ld at %p: mode %o, nlink %d, next %d\n", |
| 381 | inode->i_sb->s_id, inode->i_ino, inode, |
| 382 | inode->i_mode, inode->i_nlink, |
| 383 | NEXT_ORPHAN(inode)); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | static void ext3_put_super (struct super_block * sb) |
| 388 | { |
| 389 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
| 390 | struct ext3_super_block *es = sbi->s_es; |
| 391 | int i; |
| 392 | |
| 393 | ext3_xattr_put_super(sb); |
| 394 | journal_destroy(sbi->s_journal); |
| 395 | if (!(sb->s_flags & MS_RDONLY)) { |
| 396 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); |
| 397 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
| 398 | BUFFER_TRACE(sbi->s_sbh, "marking dirty"); |
| 399 | mark_buffer_dirty(sbi->s_sbh); |
| 400 | ext3_commit_super(sb, es, 1); |
| 401 | } |
| 402 | |
| 403 | for (i = 0; i < sbi->s_gdb_count; i++) |
| 404 | brelse(sbi->s_group_desc[i]); |
| 405 | kfree(sbi->s_group_desc); |
| 406 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
| 407 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 408 | percpu_counter_destroy(&sbi->s_dirs_counter); |
| 409 | brelse(sbi->s_sbh); |
| 410 | #ifdef CONFIG_QUOTA |
| 411 | for (i = 0; i < MAXQUOTAS; i++) |
| 412 | kfree(sbi->s_qf_names[i]); |
| 413 | #endif |
| 414 | |
| 415 | /* Debugging code just in case the in-memory inode orphan list |
| 416 | * isn't empty. The on-disk one can be non-empty if we've |
| 417 | * detected an error and taken the fs readonly, but the |
| 418 | * in-memory list had better be clean by this point. */ |
| 419 | if (!list_empty(&sbi->s_orphan)) |
| 420 | dump_orphan_list(sb, sbi); |
| 421 | J_ASSERT(list_empty(&sbi->s_orphan)); |
| 422 | |
| 423 | invalidate_bdev(sb->s_bdev, 0); |
| 424 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
| 425 | /* |
| 426 | * Invalidate the journal device's buffers. We don't want them |
| 427 | * floating about in memory - the physical journal device may |
| 428 | * hotswapped, and it breaks the `ro-after' testing code. |
| 429 | */ |
| 430 | sync_blockdev(sbi->journal_bdev); |
| 431 | invalidate_bdev(sbi->journal_bdev, 0); |
| 432 | ext3_blkdev_remove(sbi); |
| 433 | } |
| 434 | sb->s_fs_info = NULL; |
| 435 | kfree(sbi); |
| 436 | return; |
| 437 | } |
| 438 | |
| 439 | static kmem_cache_t *ext3_inode_cachep; |
| 440 | |
| 441 | /* |
| 442 | * Called inside transaction, so use GFP_NOFS |
| 443 | */ |
| 444 | static struct inode *ext3_alloc_inode(struct super_block *sb) |
| 445 | { |
| 446 | struct ext3_inode_info *ei; |
| 447 | |
| 448 | ei = kmem_cache_alloc(ext3_inode_cachep, SLAB_NOFS); |
| 449 | if (!ei) |
| 450 | return NULL; |
| 451 | #ifdef CONFIG_EXT3_FS_POSIX_ACL |
| 452 | ei->i_acl = EXT3_ACL_NOT_CACHED; |
| 453 | ei->i_default_acl = EXT3_ACL_NOT_CACHED; |
| 454 | #endif |
| 455 | ei->i_block_alloc_info = NULL; |
| 456 | ei->vfs_inode.i_version = 1; |
| 457 | return &ei->vfs_inode; |
| 458 | } |
| 459 | |
| 460 | static void ext3_destroy_inode(struct inode *inode) |
| 461 | { |
| 462 | kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); |
| 463 | } |
| 464 | |
| 465 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) |
| 466 | { |
| 467 | struct ext3_inode_info *ei = (struct ext3_inode_info *) foo; |
| 468 | |
| 469 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == |
| 470 | SLAB_CTOR_CONSTRUCTOR) { |
| 471 | INIT_LIST_HEAD(&ei->i_orphan); |
| 472 | #ifdef CONFIG_EXT3_FS_XATTR |
| 473 | init_rwsem(&ei->xattr_sem); |
| 474 | #endif |
Arjan van de Ven | 9746151 | 2006-03-23 03:00:42 -0800 | [diff] [blame] | 475 | mutex_init(&ei->truncate_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | inode_init_once(&ei->vfs_inode); |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | static int init_inodecache(void) |
| 481 | { |
| 482 | ext3_inode_cachep = kmem_cache_create("ext3_inode_cache", |
| 483 | sizeof(struct ext3_inode_info), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 484 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 485 | SLAB_MEM_SPREAD), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | init_once, NULL); |
| 487 | if (ext3_inode_cachep == NULL) |
| 488 | return -ENOMEM; |
| 489 | return 0; |
| 490 | } |
| 491 | |
| 492 | static void destroy_inodecache(void) |
| 493 | { |
| 494 | if (kmem_cache_destroy(ext3_inode_cachep)) |
| 495 | printk(KERN_INFO "ext3_inode_cache: not all structures were freed\n"); |
| 496 | } |
| 497 | |
| 498 | static void ext3_clear_inode(struct inode *inode) |
| 499 | { |
| 500 | struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info; |
| 501 | #ifdef CONFIG_EXT3_FS_POSIX_ACL |
Andrew Morton | e602260 | 2006-06-23 02:05:32 -0700 | [diff] [blame] | 502 | if (EXT3_I(inode)->i_acl && |
| 503 | EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) { |
| 504 | posix_acl_release(EXT3_I(inode)->i_acl); |
| 505 | EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED; |
| 506 | } |
| 507 | if (EXT3_I(inode)->i_default_acl && |
| 508 | EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) { |
| 509 | posix_acl_release(EXT3_I(inode)->i_default_acl); |
| 510 | EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED; |
| 511 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | #endif |
| 513 | ext3_discard_reservation(inode); |
| 514 | EXT3_I(inode)->i_block_alloc_info = NULL; |
Andrew Morton | e602260 | 2006-06-23 02:05:32 -0700 | [diff] [blame] | 515 | if (unlikely(rsv)) |
| 516 | kfree(rsv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | } |
| 518 | |
Peter Osterlund | 6cd37cd | 2005-10-28 20:23:39 +0200 | [diff] [blame] | 519 | static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 520 | { |
Peter Osterlund | 6cd37cd | 2005-10-28 20:23:39 +0200 | [diff] [blame] | 521 | #if defined(CONFIG_QUOTA) |
OGAWA Hirofumi | 275abf5 | 2005-09-22 21:44:03 -0700 | [diff] [blame] | 522 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 524 | if (sbi->s_jquota_fmt) |
| 525 | seq_printf(seq, ",jqfmt=%s", |
| 526 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); |
| 527 | |
| 528 | if (sbi->s_qf_names[USRQUOTA]) |
| 529 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); |
| 530 | |
| 531 | if (sbi->s_qf_names[GRPQUOTA]) |
| 532 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); |
| 533 | |
| 534 | if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) |
| 535 | seq_puts(seq, ",usrquota"); |
| 536 | |
| 537 | if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) |
| 538 | seq_puts(seq, ",grpquota"); |
| 539 | #endif |
Peter Osterlund | 6cd37cd | 2005-10-28 20:23:39 +0200 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) |
| 543 | { |
| 544 | struct super_block *sb = vfs->mnt_sb; |
| 545 | |
| 546 | if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA) |
| 547 | seq_puts(seq, ",data=journal"); |
| 548 | else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA) |
| 549 | seq_puts(seq, ",data=ordered"); |
| 550 | else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA) |
| 551 | seq_puts(seq, ",data=writeback"); |
| 552 | |
| 553 | ext3_show_quota_options(seq, sb); |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 554 | |
| 555 | return 0; |
| 556 | } |
| 557 | |
| 558 | #ifdef CONFIG_QUOTA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
| 560 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
| 561 | |
| 562 | static int ext3_dquot_initialize(struct inode *inode, int type); |
| 563 | static int ext3_dquot_drop(struct inode *inode); |
| 564 | static int ext3_write_dquot(struct dquot *dquot); |
| 565 | static int ext3_acquire_dquot(struct dquot *dquot); |
| 566 | static int ext3_release_dquot(struct dquot *dquot); |
| 567 | static int ext3_mark_dquot_dirty(struct dquot *dquot); |
| 568 | static int ext3_write_info(struct super_block *sb, int type); |
| 569 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, char *path); |
| 570 | static int ext3_quota_on_mount(struct super_block *sb, int type); |
| 571 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, |
| 572 | size_t len, loff_t off); |
| 573 | static ssize_t ext3_quota_write(struct super_block *sb, int type, |
| 574 | const char *data, size_t len, loff_t off); |
| 575 | |
| 576 | static struct dquot_operations ext3_quota_operations = { |
| 577 | .initialize = ext3_dquot_initialize, |
| 578 | .drop = ext3_dquot_drop, |
| 579 | .alloc_space = dquot_alloc_space, |
| 580 | .alloc_inode = dquot_alloc_inode, |
| 581 | .free_space = dquot_free_space, |
| 582 | .free_inode = dquot_free_inode, |
| 583 | .transfer = dquot_transfer, |
| 584 | .write_dquot = ext3_write_dquot, |
| 585 | .acquire_dquot = ext3_acquire_dquot, |
| 586 | .release_dquot = ext3_release_dquot, |
| 587 | .mark_dirty = ext3_mark_dquot_dirty, |
| 588 | .write_info = ext3_write_info |
| 589 | }; |
| 590 | |
| 591 | static struct quotactl_ops ext3_qctl_operations = { |
| 592 | .quota_on = ext3_quota_on, |
| 593 | .quota_off = vfs_quota_off, |
| 594 | .quota_sync = vfs_quota_sync, |
| 595 | .get_info = vfs_get_dqinfo, |
| 596 | .set_info = vfs_set_dqinfo, |
| 597 | .get_dqblk = vfs_get_dqblk, |
| 598 | .set_dqblk = vfs_set_dqblk |
| 599 | }; |
| 600 | #endif |
| 601 | |
| 602 | static struct super_operations ext3_sops = { |
| 603 | .alloc_inode = ext3_alloc_inode, |
| 604 | .destroy_inode = ext3_destroy_inode, |
| 605 | .read_inode = ext3_read_inode, |
| 606 | .write_inode = ext3_write_inode, |
| 607 | .dirty_inode = ext3_dirty_inode, |
| 608 | .delete_inode = ext3_delete_inode, |
| 609 | .put_super = ext3_put_super, |
| 610 | .write_super = ext3_write_super, |
| 611 | .sync_fs = ext3_sync_fs, |
| 612 | .write_super_lockfs = ext3_write_super_lockfs, |
| 613 | .unlockfs = ext3_unlockfs, |
| 614 | .statfs = ext3_statfs, |
| 615 | .remount_fs = ext3_remount, |
| 616 | .clear_inode = ext3_clear_inode, |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 617 | .show_options = ext3_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | #ifdef CONFIG_QUOTA |
| 619 | .quota_read = ext3_quota_read, |
| 620 | .quota_write = ext3_quota_write, |
| 621 | #endif |
| 622 | }; |
| 623 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | static struct export_operations ext3_export_ops = { |
| 625 | .get_parent = ext3_get_parent, |
| 626 | }; |
| 627 | |
| 628 | enum { |
| 629 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, |
| 630 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, |
Adrian Bunk | 2860b73 | 2005-11-08 21:34:59 -0800 | [diff] [blame] | 631 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
Badari Pulavarty | ade1a29 | 2006-06-26 00:25:04 -0700 | [diff] [blame] | 633 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 634 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
| 636 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 637 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 638 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, |
| 639 | Opt_grpquota |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | }; |
| 641 | |
| 642 | static match_table_t tokens = { |
| 643 | {Opt_bsd_df, "bsddf"}, |
| 644 | {Opt_minix_df, "minixdf"}, |
| 645 | {Opt_grpid, "grpid"}, |
| 646 | {Opt_grpid, "bsdgroups"}, |
| 647 | {Opt_nogrpid, "nogrpid"}, |
| 648 | {Opt_nogrpid, "sysvgroups"}, |
| 649 | {Opt_resgid, "resgid=%u"}, |
| 650 | {Opt_resuid, "resuid=%u"}, |
| 651 | {Opt_sb, "sb=%u"}, |
| 652 | {Opt_err_cont, "errors=continue"}, |
| 653 | {Opt_err_panic, "errors=panic"}, |
| 654 | {Opt_err_ro, "errors=remount-ro"}, |
| 655 | {Opt_nouid32, "nouid32"}, |
| 656 | {Opt_nocheck, "nocheck"}, |
| 657 | {Opt_nocheck, "check=none"}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | {Opt_debug, "debug"}, |
| 659 | {Opt_oldalloc, "oldalloc"}, |
| 660 | {Opt_orlov, "orlov"}, |
| 661 | {Opt_user_xattr, "user_xattr"}, |
| 662 | {Opt_nouser_xattr, "nouser_xattr"}, |
| 663 | {Opt_acl, "acl"}, |
| 664 | {Opt_noacl, "noacl"}, |
| 665 | {Opt_reservation, "reservation"}, |
| 666 | {Opt_noreservation, "noreservation"}, |
| 667 | {Opt_noload, "noload"}, |
| 668 | {Opt_nobh, "nobh"}, |
Badari Pulavarty | ade1a29 | 2006-06-26 00:25:04 -0700 | [diff] [blame] | 669 | {Opt_bh, "bh"}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | {Opt_commit, "commit=%u"}, |
| 671 | {Opt_journal_update, "journal=update"}, |
| 672 | {Opt_journal_inum, "journal=%u"}, |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 673 | {Opt_journal_dev, "journal_dev=%u"}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | {Opt_abort, "abort"}, |
| 675 | {Opt_data_journal, "data=journal"}, |
| 676 | {Opt_data_ordered, "data=ordered"}, |
| 677 | {Opt_data_writeback, "data=writeback"}, |
| 678 | {Opt_offusrjquota, "usrjquota="}, |
| 679 | {Opt_usrjquota, "usrjquota=%s"}, |
| 680 | {Opt_offgrpjquota, "grpjquota="}, |
| 681 | {Opt_grpjquota, "grpjquota=%s"}, |
| 682 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, |
| 683 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 684 | {Opt_grpquota, "grpquota"}, |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 685 | {Opt_noquota, "noquota"}, |
| 686 | {Opt_quota, "quota"}, |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 687 | {Opt_usrquota, "usrquota"}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | {Opt_barrier, "barrier=%u"}, |
| 689 | {Opt_err, NULL}, |
| 690 | {Opt_resize, "resize"}, |
| 691 | }; |
| 692 | |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 693 | static ext3_fsblk_t get_sb_block(void **data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | { |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 695 | ext3_fsblk_t sb_block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | char *options = (char *) *data; |
| 697 | |
| 698 | if (!options || strncmp(options, "sb=", 3) != 0) |
| 699 | return 1; /* Default location */ |
| 700 | options += 3; |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 701 | /*todo: use simple_strtoll with >32bit ext3 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | sb_block = simple_strtoul(options, &options, 0); |
| 703 | if (*options && *options != ',') { |
| 704 | printk("EXT3-fs: Invalid sb specification: %s\n", |
| 705 | (char *) *data); |
| 706 | return 1; |
| 707 | } |
| 708 | if (*options == ',') |
| 709 | options++; |
| 710 | *data = (void *) options; |
| 711 | return sb_block; |
| 712 | } |
| 713 | |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 714 | static int parse_options (char *options, struct super_block *sb, |
| 715 | unsigned long *inum, unsigned long *journal_devnum, |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 716 | ext3_fsblk_t *n_blocks_count, int is_remount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | { |
| 718 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
| 719 | char * p; |
| 720 | substring_t args[MAX_OPT_ARGS]; |
| 721 | int data_opt = 0; |
| 722 | int option; |
| 723 | #ifdef CONFIG_QUOTA |
| 724 | int qtype; |
| 725 | char *qname; |
| 726 | #endif |
| 727 | |
| 728 | if (!options) |
| 729 | return 1; |
| 730 | |
| 731 | while ((p = strsep (&options, ",")) != NULL) { |
| 732 | int token; |
| 733 | if (!*p) |
| 734 | continue; |
| 735 | |
| 736 | token = match_token(p, tokens, args); |
| 737 | switch (token) { |
| 738 | case Opt_bsd_df: |
| 739 | clear_opt (sbi->s_mount_opt, MINIX_DF); |
| 740 | break; |
| 741 | case Opt_minix_df: |
| 742 | set_opt (sbi->s_mount_opt, MINIX_DF); |
| 743 | break; |
| 744 | case Opt_grpid: |
| 745 | set_opt (sbi->s_mount_opt, GRPID); |
| 746 | break; |
| 747 | case Opt_nogrpid: |
| 748 | clear_opt (sbi->s_mount_opt, GRPID); |
| 749 | break; |
| 750 | case Opt_resuid: |
| 751 | if (match_int(&args[0], &option)) |
| 752 | return 0; |
| 753 | sbi->s_resuid = option; |
| 754 | break; |
| 755 | case Opt_resgid: |
| 756 | if (match_int(&args[0], &option)) |
| 757 | return 0; |
| 758 | sbi->s_resgid = option; |
| 759 | break; |
| 760 | case Opt_sb: |
| 761 | /* handled by get_sb_block() instead of here */ |
| 762 | /* *sb_block = match_int(&args[0]); */ |
| 763 | break; |
| 764 | case Opt_err_panic: |
| 765 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); |
| 766 | clear_opt (sbi->s_mount_opt, ERRORS_RO); |
| 767 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); |
| 768 | break; |
| 769 | case Opt_err_ro: |
| 770 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); |
| 771 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); |
| 772 | set_opt (sbi->s_mount_opt, ERRORS_RO); |
| 773 | break; |
| 774 | case Opt_err_cont: |
| 775 | clear_opt (sbi->s_mount_opt, ERRORS_RO); |
| 776 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); |
| 777 | set_opt (sbi->s_mount_opt, ERRORS_CONT); |
| 778 | break; |
| 779 | case Opt_nouid32: |
| 780 | set_opt (sbi->s_mount_opt, NO_UID32); |
| 781 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | case Opt_nocheck: |
| 783 | clear_opt (sbi->s_mount_opt, CHECK); |
| 784 | break; |
| 785 | case Opt_debug: |
| 786 | set_opt (sbi->s_mount_opt, DEBUG); |
| 787 | break; |
| 788 | case Opt_oldalloc: |
| 789 | set_opt (sbi->s_mount_opt, OLDALLOC); |
| 790 | break; |
| 791 | case Opt_orlov: |
| 792 | clear_opt (sbi->s_mount_opt, OLDALLOC); |
| 793 | break; |
| 794 | #ifdef CONFIG_EXT3_FS_XATTR |
| 795 | case Opt_user_xattr: |
| 796 | set_opt (sbi->s_mount_opt, XATTR_USER); |
| 797 | break; |
| 798 | case Opt_nouser_xattr: |
| 799 | clear_opt (sbi->s_mount_opt, XATTR_USER); |
| 800 | break; |
| 801 | #else |
| 802 | case Opt_user_xattr: |
| 803 | case Opt_nouser_xattr: |
| 804 | printk("EXT3 (no)user_xattr options not supported\n"); |
| 805 | break; |
| 806 | #endif |
| 807 | #ifdef CONFIG_EXT3_FS_POSIX_ACL |
| 808 | case Opt_acl: |
| 809 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
| 810 | break; |
| 811 | case Opt_noacl: |
| 812 | clear_opt(sbi->s_mount_opt, POSIX_ACL); |
| 813 | break; |
| 814 | #else |
| 815 | case Opt_acl: |
| 816 | case Opt_noacl: |
| 817 | printk("EXT3 (no)acl options not supported\n"); |
| 818 | break; |
| 819 | #endif |
| 820 | case Opt_reservation: |
| 821 | set_opt(sbi->s_mount_opt, RESERVATION); |
| 822 | break; |
| 823 | case Opt_noreservation: |
| 824 | clear_opt(sbi->s_mount_opt, RESERVATION); |
| 825 | break; |
| 826 | case Opt_journal_update: |
| 827 | /* @@@ FIXME */ |
| 828 | /* Eventually we will want to be able to create |
| 829 | a journal file here. For now, only allow the |
| 830 | user to specify an existing inode to be the |
| 831 | journal file. */ |
| 832 | if (is_remount) { |
| 833 | printk(KERN_ERR "EXT3-fs: cannot specify " |
| 834 | "journal on remount\n"); |
| 835 | return 0; |
| 836 | } |
| 837 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); |
| 838 | break; |
| 839 | case Opt_journal_inum: |
| 840 | if (is_remount) { |
| 841 | printk(KERN_ERR "EXT3-fs: cannot specify " |
| 842 | "journal on remount\n"); |
| 843 | return 0; |
| 844 | } |
| 845 | if (match_int(&args[0], &option)) |
| 846 | return 0; |
| 847 | *inum = option; |
| 848 | break; |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 849 | case Opt_journal_dev: |
| 850 | if (is_remount) { |
| 851 | printk(KERN_ERR "EXT3-fs: cannot specify " |
| 852 | "journal on remount\n"); |
| 853 | return 0; |
| 854 | } |
| 855 | if (match_int(&args[0], &option)) |
| 856 | return 0; |
| 857 | *journal_devnum = option; |
| 858 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | case Opt_noload: |
| 860 | set_opt (sbi->s_mount_opt, NOLOAD); |
| 861 | break; |
| 862 | case Opt_commit: |
| 863 | if (match_int(&args[0], &option)) |
| 864 | return 0; |
| 865 | if (option < 0) |
| 866 | return 0; |
| 867 | if (option == 0) |
| 868 | option = JBD_DEFAULT_MAX_COMMIT_AGE; |
| 869 | sbi->s_commit_interval = HZ * option; |
| 870 | break; |
| 871 | case Opt_data_journal: |
| 872 | data_opt = EXT3_MOUNT_JOURNAL_DATA; |
| 873 | goto datacheck; |
| 874 | case Opt_data_ordered: |
| 875 | data_opt = EXT3_MOUNT_ORDERED_DATA; |
| 876 | goto datacheck; |
| 877 | case Opt_data_writeback: |
| 878 | data_opt = EXT3_MOUNT_WRITEBACK_DATA; |
| 879 | datacheck: |
| 880 | if (is_remount) { |
| 881 | if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS) |
| 882 | != data_opt) { |
| 883 | printk(KERN_ERR |
| 884 | "EXT3-fs: cannot change data " |
| 885 | "mode on remount\n"); |
| 886 | return 0; |
| 887 | } |
| 888 | } else { |
| 889 | sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS; |
| 890 | sbi->s_mount_opt |= data_opt; |
| 891 | } |
| 892 | break; |
| 893 | #ifdef CONFIG_QUOTA |
| 894 | case Opt_usrjquota: |
| 895 | qtype = USRQUOTA; |
| 896 | goto set_qf_name; |
| 897 | case Opt_grpjquota: |
| 898 | qtype = GRPQUOTA; |
| 899 | set_qf_name: |
| 900 | if (sb_any_quota_enabled(sb)) { |
| 901 | printk(KERN_ERR |
| 902 | "EXT3-fs: Cannot change journalled " |
| 903 | "quota options when quota turned on.\n"); |
| 904 | return 0; |
| 905 | } |
| 906 | qname = match_strdup(&args[0]); |
| 907 | if (!qname) { |
| 908 | printk(KERN_ERR |
| 909 | "EXT3-fs: not enough memory for " |
| 910 | "storing quotafile name.\n"); |
| 911 | return 0; |
| 912 | } |
| 913 | if (sbi->s_qf_names[qtype] && |
| 914 | strcmp(sbi->s_qf_names[qtype], qname)) { |
| 915 | printk(KERN_ERR |
| 916 | "EXT3-fs: %s quota file already " |
| 917 | "specified.\n", QTYPE2NAME(qtype)); |
| 918 | kfree(qname); |
| 919 | return 0; |
| 920 | } |
| 921 | sbi->s_qf_names[qtype] = qname; |
| 922 | if (strchr(sbi->s_qf_names[qtype], '/')) { |
| 923 | printk(KERN_ERR |
| 924 | "EXT3-fs: quotafile must be on " |
| 925 | "filesystem root.\n"); |
| 926 | kfree(sbi->s_qf_names[qtype]); |
| 927 | sbi->s_qf_names[qtype] = NULL; |
| 928 | return 0; |
| 929 | } |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 930 | set_opt(sbi->s_mount_opt, QUOTA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | break; |
| 932 | case Opt_offusrjquota: |
| 933 | qtype = USRQUOTA; |
| 934 | goto clear_qf_name; |
| 935 | case Opt_offgrpjquota: |
| 936 | qtype = GRPQUOTA; |
| 937 | clear_qf_name: |
| 938 | if (sb_any_quota_enabled(sb)) { |
| 939 | printk(KERN_ERR "EXT3-fs: Cannot change " |
| 940 | "journalled quota options when " |
| 941 | "quota turned on.\n"); |
| 942 | return 0; |
| 943 | } |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 944 | /* |
| 945 | * The space will be released later when all options |
| 946 | * are confirmed to be correct |
| 947 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | sbi->s_qf_names[qtype] = NULL; |
| 949 | break; |
| 950 | case Opt_jqfmt_vfsold: |
| 951 | sbi->s_jquota_fmt = QFMT_VFS_OLD; |
| 952 | break; |
| 953 | case Opt_jqfmt_vfsv0: |
| 954 | sbi->s_jquota_fmt = QFMT_VFS_V0; |
| 955 | break; |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 956 | case Opt_quota: |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 957 | case Opt_usrquota: |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 958 | set_opt(sbi->s_mount_opt, QUOTA); |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 959 | set_opt(sbi->s_mount_opt, USRQUOTA); |
| 960 | break; |
| 961 | case Opt_grpquota: |
| 962 | set_opt(sbi->s_mount_opt, QUOTA); |
| 963 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 964 | break; |
| 965 | case Opt_noquota: |
| 966 | if (sb_any_quota_enabled(sb)) { |
| 967 | printk(KERN_ERR "EXT3-fs: Cannot change quota " |
| 968 | "options when quota turned on.\n"); |
| 969 | return 0; |
| 970 | } |
| 971 | clear_opt(sbi->s_mount_opt, QUOTA); |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 972 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
| 973 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 974 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | #else |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 976 | case Opt_quota: |
| 977 | case Opt_usrquota: |
| 978 | case Opt_grpquota: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | case Opt_usrjquota: |
| 980 | case Opt_grpjquota: |
| 981 | case Opt_offusrjquota: |
| 982 | case Opt_offgrpjquota: |
| 983 | case Opt_jqfmt_vfsold: |
| 984 | case Opt_jqfmt_vfsv0: |
| 985 | printk(KERN_ERR |
| 986 | "EXT3-fs: journalled quota options not " |
| 987 | "supported.\n"); |
| 988 | break; |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 989 | case Opt_noquota: |
| 990 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | #endif |
| 992 | case Opt_abort: |
| 993 | set_opt(sbi->s_mount_opt, ABORT); |
| 994 | break; |
| 995 | case Opt_barrier: |
| 996 | if (match_int(&args[0], &option)) |
| 997 | return 0; |
| 998 | if (option) |
| 999 | set_opt(sbi->s_mount_opt, BARRIER); |
| 1000 | else |
| 1001 | clear_opt(sbi->s_mount_opt, BARRIER); |
| 1002 | break; |
| 1003 | case Opt_ignore: |
| 1004 | break; |
| 1005 | case Opt_resize: |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 1006 | if (!is_remount) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | printk("EXT3-fs: resize option only available " |
| 1008 | "for remount\n"); |
| 1009 | return 0; |
| 1010 | } |
KAMBAROV, ZAUR | c7f1721 | 2005-06-28 20:45:11 -0700 | [diff] [blame] | 1011 | if (match_int(&args[0], &option) != 0) |
| 1012 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | *n_blocks_count = option; |
| 1014 | break; |
| 1015 | case Opt_nobh: |
| 1016 | set_opt(sbi->s_mount_opt, NOBH); |
| 1017 | break; |
Badari Pulavarty | ade1a29 | 2006-06-26 00:25:04 -0700 | [diff] [blame] | 1018 | case Opt_bh: |
| 1019 | clear_opt(sbi->s_mount_opt, NOBH); |
| 1020 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | default: |
| 1022 | printk (KERN_ERR |
| 1023 | "EXT3-fs: Unrecognized mount option \"%s\" " |
| 1024 | "or missing value\n", p); |
| 1025 | return 0; |
| 1026 | } |
| 1027 | } |
| 1028 | #ifdef CONFIG_QUOTA |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 1029 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
| 1030 | if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) && |
| 1031 | sbi->s_qf_names[USRQUOTA]) |
| 1032 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
| 1033 | |
| 1034 | if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) && |
| 1035 | sbi->s_qf_names[GRPQUOTA]) |
| 1036 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
| 1037 | |
| 1038 | if ((sbi->s_qf_names[USRQUOTA] && |
| 1039 | (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) || |
| 1040 | (sbi->s_qf_names[GRPQUOTA] && |
| 1041 | (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) { |
| 1042 | printk(KERN_ERR "EXT3-fs: old and new quota " |
| 1043 | "format mixing.\n"); |
| 1044 | return 0; |
| 1045 | } |
| 1046 | |
| 1047 | if (!sbi->s_jquota_fmt) { |
| 1048 | printk(KERN_ERR "EXT3-fs: journalled quota format " |
| 1049 | "not specified.\n"); |
| 1050 | return 0; |
| 1051 | } |
| 1052 | } else { |
| 1053 | if (sbi->s_jquota_fmt) { |
| 1054 | printk(KERN_ERR "EXT3-fs: journalled quota format " |
| 1055 | "specified with no journalling " |
| 1056 | "enabled.\n"); |
| 1057 | return 0; |
| 1058 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | } |
| 1060 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | return 1; |
| 1062 | } |
| 1063 | |
| 1064 | static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es, |
| 1065 | int read_only) |
| 1066 | { |
| 1067 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
| 1068 | int res = 0; |
| 1069 | |
| 1070 | if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) { |
| 1071 | printk (KERN_ERR "EXT3-fs warning: revision level too high, " |
| 1072 | "forcing read-only mode\n"); |
| 1073 | res = MS_RDONLY; |
| 1074 | } |
| 1075 | if (read_only) |
| 1076 | return res; |
| 1077 | if (!(sbi->s_mount_state & EXT3_VALID_FS)) |
| 1078 | printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, " |
| 1079 | "running e2fsck is recommended\n"); |
| 1080 | else if ((sbi->s_mount_state & EXT3_ERROR_FS)) |
| 1081 | printk (KERN_WARNING |
| 1082 | "EXT3-fs warning: mounting fs with errors, " |
| 1083 | "running e2fsck is recommended\n"); |
| 1084 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
| 1085 | le16_to_cpu(es->s_mnt_count) >= |
| 1086 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) |
| 1087 | printk (KERN_WARNING |
| 1088 | "EXT3-fs warning: maximal mount count reached, " |
| 1089 | "running e2fsck is recommended\n"); |
| 1090 | else if (le32_to_cpu(es->s_checkinterval) && |
| 1091 | (le32_to_cpu(es->s_lastcheck) + |
| 1092 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) |
| 1093 | printk (KERN_WARNING |
| 1094 | "EXT3-fs warning: checktime reached, " |
| 1095 | "running e2fsck is recommended\n"); |
| 1096 | #if 0 |
| 1097 | /* @@@ We _will_ want to clear the valid bit if we find |
| 1098 | inconsistencies, to force a fsck at reboot. But for |
| 1099 | a plain journaled filesystem we can keep it set as |
| 1100 | valid forever! :) */ |
| 1101 | es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT3_VALID_FS); |
| 1102 | #endif |
| 1103 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
| 1104 | es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT); |
| 1105 | es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1); |
| 1106 | es->s_mtime = cpu_to_le32(get_seconds()); |
| 1107 | ext3_update_dynamic_rev(sb); |
| 1108 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); |
| 1109 | |
| 1110 | ext3_commit_super(sb, es, 1); |
| 1111 | if (test_opt(sb, DEBUG)) |
| 1112 | printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, " |
| 1113 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
| 1114 | sb->s_blocksize, |
| 1115 | sbi->s_groups_count, |
| 1116 | EXT3_BLOCKS_PER_GROUP(sb), |
| 1117 | EXT3_INODES_PER_GROUP(sb), |
| 1118 | sbi->s_mount_opt); |
| 1119 | |
| 1120 | printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id); |
| 1121 | if (EXT3_SB(sb)->s_journal->j_inode == NULL) { |
| 1122 | char b[BDEVNAME_SIZE]; |
| 1123 | |
| 1124 | printk("external journal on %s\n", |
| 1125 | bdevname(EXT3_SB(sb)->s_journal->j_dev, b)); |
| 1126 | } else { |
| 1127 | printk("internal journal\n"); |
| 1128 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | return res; |
| 1130 | } |
| 1131 | |
| 1132 | /* Called at mount-time, super-block is locked */ |
| 1133 | static int ext3_check_descriptors (struct super_block * sb) |
| 1134 | { |
| 1135 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 1136 | ext3_fsblk_t block = le32_to_cpu(sbi->s_es->s_first_data_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | struct ext3_group_desc * gdp = NULL; |
| 1138 | int desc_block = 0; |
| 1139 | int i; |
| 1140 | |
| 1141 | ext3_debug ("Checking group descriptors"); |
| 1142 | |
| 1143 | for (i = 0; i < sbi->s_groups_count; i++) |
| 1144 | { |
| 1145 | if ((i % EXT3_DESC_PER_BLOCK(sb)) == 0) |
| 1146 | gdp = (struct ext3_group_desc *) |
| 1147 | sbi->s_group_desc[desc_block++]->b_data; |
| 1148 | if (le32_to_cpu(gdp->bg_block_bitmap) < block || |
| 1149 | le32_to_cpu(gdp->bg_block_bitmap) >= |
| 1150 | block + EXT3_BLOCKS_PER_GROUP(sb)) |
| 1151 | { |
| 1152 | ext3_error (sb, "ext3_check_descriptors", |
| 1153 | "Block bitmap for group %d" |
| 1154 | " not in group (block %lu)!", |
| 1155 | i, (unsigned long) |
| 1156 | le32_to_cpu(gdp->bg_block_bitmap)); |
| 1157 | return 0; |
| 1158 | } |
| 1159 | if (le32_to_cpu(gdp->bg_inode_bitmap) < block || |
| 1160 | le32_to_cpu(gdp->bg_inode_bitmap) >= |
| 1161 | block + EXT3_BLOCKS_PER_GROUP(sb)) |
| 1162 | { |
| 1163 | ext3_error (sb, "ext3_check_descriptors", |
| 1164 | "Inode bitmap for group %d" |
| 1165 | " not in group (block %lu)!", |
| 1166 | i, (unsigned long) |
| 1167 | le32_to_cpu(gdp->bg_inode_bitmap)); |
| 1168 | return 0; |
| 1169 | } |
| 1170 | if (le32_to_cpu(gdp->bg_inode_table) < block || |
| 1171 | le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >= |
| 1172 | block + EXT3_BLOCKS_PER_GROUP(sb)) |
| 1173 | { |
| 1174 | ext3_error (sb, "ext3_check_descriptors", |
| 1175 | "Inode table for group %d" |
| 1176 | " not in group (block %lu)!", |
| 1177 | i, (unsigned long) |
| 1178 | le32_to_cpu(gdp->bg_inode_table)); |
| 1179 | return 0; |
| 1180 | } |
| 1181 | block += EXT3_BLOCKS_PER_GROUP(sb); |
| 1182 | gdp++; |
| 1183 | } |
| 1184 | |
| 1185 | sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb)); |
| 1186 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb)); |
| 1187 | return 1; |
| 1188 | } |
| 1189 | |
| 1190 | |
| 1191 | /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at |
| 1192 | * the superblock) which were deleted from all directories, but held open by |
| 1193 | * a process at the time of a crash. We walk the list and try to delete these |
| 1194 | * inodes at recovery time (only with a read-write filesystem). |
| 1195 | * |
| 1196 | * In order to keep the orphan inode chain consistent during traversal (in |
| 1197 | * case of crash during recovery), we link each inode into the superblock |
| 1198 | * orphan list_head and handle it the same way as an inode deletion during |
| 1199 | * normal operation (which journals the operations for us). |
| 1200 | * |
| 1201 | * We only do an iget() and an iput() on each inode, which is very safe if we |
| 1202 | * accidentally point at an in-use or already deleted inode. The worst that |
| 1203 | * can happen in this case is that we get a "bit already cleared" message from |
| 1204 | * ext3_free_inode(). The only reason we would point at a wrong inode is if |
| 1205 | * e2fsck was run on this filesystem, and it must have already done the orphan |
| 1206 | * inode cleanup for us, so we can safely abort without any further action. |
| 1207 | */ |
| 1208 | static void ext3_orphan_cleanup (struct super_block * sb, |
| 1209 | struct ext3_super_block * es) |
| 1210 | { |
| 1211 | unsigned int s_flags = sb->s_flags; |
| 1212 | int nr_orphans = 0, nr_truncates = 0; |
| 1213 | #ifdef CONFIG_QUOTA |
| 1214 | int i; |
| 1215 | #endif |
| 1216 | if (!es->s_last_orphan) { |
| 1217 | jbd_debug(4, "no orphan inodes to clean up\n"); |
| 1218 | return; |
| 1219 | } |
| 1220 | |
| 1221 | if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { |
| 1222 | if (es->s_last_orphan) |
| 1223 | jbd_debug(1, "Errors on filesystem, " |
| 1224 | "clearing orphan list.\n"); |
| 1225 | es->s_last_orphan = 0; |
| 1226 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
| 1227 | return; |
| 1228 | } |
| 1229 | |
| 1230 | if (s_flags & MS_RDONLY) { |
| 1231 | printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n", |
| 1232 | sb->s_id); |
| 1233 | sb->s_flags &= ~MS_RDONLY; |
| 1234 | } |
| 1235 | #ifdef CONFIG_QUOTA |
| 1236 | /* Needed for iput() to work correctly and not trash data */ |
| 1237 | sb->s_flags |= MS_ACTIVE; |
| 1238 | /* Turn on quotas so that they are updated correctly */ |
| 1239 | for (i = 0; i < MAXQUOTAS; i++) { |
| 1240 | if (EXT3_SB(sb)->s_qf_names[i]) { |
| 1241 | int ret = ext3_quota_on_mount(sb, i); |
| 1242 | if (ret < 0) |
| 1243 | printk(KERN_ERR |
| 1244 | "EXT3-fs: Cannot turn on journalled " |
| 1245 | "quota: error %d\n", ret); |
| 1246 | } |
| 1247 | } |
| 1248 | #endif |
| 1249 | |
| 1250 | while (es->s_last_orphan) { |
| 1251 | struct inode *inode; |
| 1252 | |
| 1253 | if (!(inode = |
| 1254 | ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) { |
| 1255 | es->s_last_orphan = 0; |
| 1256 | break; |
| 1257 | } |
| 1258 | |
| 1259 | list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan); |
| 1260 | DQUOT_INIT(inode); |
| 1261 | if (inode->i_nlink) { |
| 1262 | printk(KERN_DEBUG |
| 1263 | "%s: truncating inode %ld to %Ld bytes\n", |
| 1264 | __FUNCTION__, inode->i_ino, inode->i_size); |
| 1265 | jbd_debug(2, "truncating inode %ld to %Ld bytes\n", |
| 1266 | inode->i_ino, inode->i_size); |
| 1267 | ext3_truncate(inode); |
| 1268 | nr_truncates++; |
| 1269 | } else { |
| 1270 | printk(KERN_DEBUG |
| 1271 | "%s: deleting unreferenced inode %ld\n", |
| 1272 | __FUNCTION__, inode->i_ino); |
| 1273 | jbd_debug(2, "deleting unreferenced inode %ld\n", |
| 1274 | inode->i_ino); |
| 1275 | nr_orphans++; |
| 1276 | } |
| 1277 | iput(inode); /* The delete magic happens here! */ |
| 1278 | } |
| 1279 | |
| 1280 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" |
| 1281 | |
| 1282 | if (nr_orphans) |
| 1283 | printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n", |
| 1284 | sb->s_id, PLURAL(nr_orphans)); |
| 1285 | if (nr_truncates) |
| 1286 | printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n", |
| 1287 | sb->s_id, PLURAL(nr_truncates)); |
| 1288 | #ifdef CONFIG_QUOTA |
| 1289 | /* Turn quotas off */ |
| 1290 | for (i = 0; i < MAXQUOTAS; i++) { |
| 1291 | if (sb_dqopt(sb)->files[i]) |
| 1292 | vfs_quota_off(sb, i); |
| 1293 | } |
| 1294 | #endif |
| 1295 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ |
| 1296 | } |
| 1297 | |
| 1298 | #define log2(n) ffz(~(n)) |
| 1299 | |
| 1300 | /* |
| 1301 | * Maximal file size. There is a direct, and {,double-,triple-}indirect |
| 1302 | * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. |
| 1303 | * We need to be 1 filesystem block less than the 2^32 sector limit. |
| 1304 | */ |
| 1305 | static loff_t ext3_max_size(int bits) |
| 1306 | { |
| 1307 | loff_t res = EXT3_NDIR_BLOCKS; |
| 1308 | /* This constant is calculated to be the largest file size for a |
| 1309 | * dense, 4k-blocksize file such that the total number of |
| 1310 | * sectors in the file, including data and all indirect blocks, |
| 1311 | * does not exceed 2^32. */ |
| 1312 | const loff_t upper_limit = 0x1ff7fffd000LL; |
| 1313 | |
| 1314 | res += 1LL << (bits-2); |
| 1315 | res += 1LL << (2*(bits-2)); |
| 1316 | res += 1LL << (3*(bits-2)); |
| 1317 | res <<= bits; |
| 1318 | if (res > upper_limit) |
| 1319 | res = upper_limit; |
| 1320 | return res; |
| 1321 | } |
| 1322 | |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 1323 | static ext3_fsblk_t descriptor_loc(struct super_block *sb, |
| 1324 | ext3_fsblk_t logic_sb_block, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | int nr) |
| 1326 | { |
| 1327 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 1328 | unsigned long bg, first_meta_bg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | int has_super = 0; |
| 1330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
| 1332 | |
| 1333 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) || |
| 1334 | nr < first_meta_bg) |
| 1335 | return (logic_sb_block + nr + 1); |
| 1336 | bg = sbi->s_desc_per_block * nr; |
| 1337 | if (ext3_bg_has_super(sb, bg)) |
| 1338 | has_super = 1; |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 1339 | return (has_super + ext3_group_first_block_no(sb, bg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | } |
| 1341 | |
| 1342 | |
| 1343 | static int ext3_fill_super (struct super_block *sb, void *data, int silent) |
| 1344 | { |
| 1345 | struct buffer_head * bh; |
| 1346 | struct ext3_super_block *es = NULL; |
| 1347 | struct ext3_sb_info *sbi; |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 1348 | ext3_fsblk_t block; |
| 1349 | ext3_fsblk_t sb_block = get_sb_block(&data); |
| 1350 | ext3_fsblk_t logic_sb_block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | unsigned long offset = 0; |
| 1352 | unsigned long journal_inum = 0; |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 1353 | unsigned long journal_devnum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | unsigned long def_mount_opts; |
| 1355 | struct inode *root; |
| 1356 | int blocksize; |
| 1357 | int hblock; |
| 1358 | int db_count; |
| 1359 | int i; |
| 1360 | int needs_recovery; |
| 1361 | __le32 features; |
| 1362 | |
| 1363 | sbi = kmalloc(sizeof(*sbi), GFP_KERNEL); |
| 1364 | if (!sbi) |
| 1365 | return -ENOMEM; |
| 1366 | sb->s_fs_info = sbi; |
| 1367 | memset(sbi, 0, sizeof(*sbi)); |
| 1368 | sbi->s_mount_opt = 0; |
| 1369 | sbi->s_resuid = EXT3_DEF_RESUID; |
| 1370 | sbi->s_resgid = EXT3_DEF_RESGID; |
| 1371 | |
| 1372 | unlock_kernel(); |
| 1373 | |
| 1374 | blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); |
| 1375 | if (!blocksize) { |
| 1376 | printk(KERN_ERR "EXT3-fs: unable to set blocksize\n"); |
| 1377 | goto out_fail; |
| 1378 | } |
| 1379 | |
| 1380 | /* |
| 1381 | * The ext3 superblock will not be buffer aligned for other than 1kB |
| 1382 | * block sizes. We need to calculate the offset from buffer start. |
| 1383 | */ |
| 1384 | if (blocksize != EXT3_MIN_BLOCK_SIZE) { |
| 1385 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; |
| 1386 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; |
| 1387 | } else { |
| 1388 | logic_sb_block = sb_block; |
| 1389 | } |
| 1390 | |
| 1391 | if (!(bh = sb_bread(sb, logic_sb_block))) { |
| 1392 | printk (KERN_ERR "EXT3-fs: unable to read superblock\n"); |
| 1393 | goto out_fail; |
| 1394 | } |
| 1395 | /* |
| 1396 | * Note: s_es must be initialized as soon as possible because |
| 1397 | * some ext3 macro-instructions depend on its value |
| 1398 | */ |
| 1399 | es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); |
| 1400 | sbi->s_es = es; |
| 1401 | sb->s_magic = le16_to_cpu(es->s_magic); |
| 1402 | if (sb->s_magic != EXT3_SUPER_MAGIC) |
| 1403 | goto cantfind_ext3; |
| 1404 | |
| 1405 | /* Set defaults before we parse the mount options */ |
| 1406 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); |
| 1407 | if (def_mount_opts & EXT3_DEFM_DEBUG) |
| 1408 | set_opt(sbi->s_mount_opt, DEBUG); |
| 1409 | if (def_mount_opts & EXT3_DEFM_BSDGROUPS) |
| 1410 | set_opt(sbi->s_mount_opt, GRPID); |
| 1411 | if (def_mount_opts & EXT3_DEFM_UID16) |
| 1412 | set_opt(sbi->s_mount_opt, NO_UID32); |
| 1413 | if (def_mount_opts & EXT3_DEFM_XATTR_USER) |
| 1414 | set_opt(sbi->s_mount_opt, XATTR_USER); |
| 1415 | if (def_mount_opts & EXT3_DEFM_ACL) |
| 1416 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
| 1417 | if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA) |
| 1418 | sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA; |
| 1419 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED) |
| 1420 | sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA; |
| 1421 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK) |
| 1422 | sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA; |
| 1423 | |
| 1424 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC) |
| 1425 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
| 1426 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_RO) |
| 1427 | set_opt(sbi->s_mount_opt, ERRORS_RO); |
| 1428 | |
| 1429 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); |
| 1430 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); |
| 1431 | |
| 1432 | set_opt(sbi->s_mount_opt, RESERVATION); |
| 1433 | |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 1434 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
| 1435 | NULL, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | goto failed_mount; |
| 1437 | |
| 1438 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
| 1439 | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
| 1440 | |
| 1441 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV && |
| 1442 | (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) || |
| 1443 | EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) || |
| 1444 | EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U))) |
| 1445 | printk(KERN_WARNING |
| 1446 | "EXT3-fs warning: feature flags set on rev 0 fs, " |
| 1447 | "running e2fsck is recommended\n"); |
| 1448 | /* |
| 1449 | * Check feature flags regardless of the revision level, since we |
| 1450 | * previously didn't change the revision level when setting the flags, |
| 1451 | * so there is a chance incompat flags are set on a rev 0 filesystem. |
| 1452 | */ |
| 1453 | features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP); |
| 1454 | if (features) { |
| 1455 | printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of " |
| 1456 | "unsupported optional features (%x).\n", |
| 1457 | sb->s_id, le32_to_cpu(features)); |
| 1458 | goto failed_mount; |
| 1459 | } |
| 1460 | features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP); |
| 1461 | if (!(sb->s_flags & MS_RDONLY) && features) { |
| 1462 | printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of " |
| 1463 | "unsupported optional features (%x).\n", |
| 1464 | sb->s_id, le32_to_cpu(features)); |
| 1465 | goto failed_mount; |
| 1466 | } |
| 1467 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
| 1468 | |
| 1469 | if (blocksize < EXT3_MIN_BLOCK_SIZE || |
| 1470 | blocksize > EXT3_MAX_BLOCK_SIZE) { |
| 1471 | printk(KERN_ERR |
| 1472 | "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n", |
| 1473 | blocksize, sb->s_id); |
| 1474 | goto failed_mount; |
| 1475 | } |
| 1476 | |
| 1477 | hblock = bdev_hardsect_size(sb->s_bdev); |
| 1478 | if (sb->s_blocksize != blocksize) { |
| 1479 | /* |
| 1480 | * Make sure the blocksize for the filesystem is larger |
| 1481 | * than the hardware sectorsize for the machine. |
| 1482 | */ |
| 1483 | if (blocksize < hblock) { |
| 1484 | printk(KERN_ERR "EXT3-fs: blocksize %d too small for " |
| 1485 | "device blocksize %d.\n", blocksize, hblock); |
| 1486 | goto failed_mount; |
| 1487 | } |
| 1488 | |
| 1489 | brelse (bh); |
| 1490 | sb_set_blocksize(sb, blocksize); |
| 1491 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; |
| 1492 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; |
| 1493 | bh = sb_bread(sb, logic_sb_block); |
| 1494 | if (!bh) { |
| 1495 | printk(KERN_ERR |
| 1496 | "EXT3-fs: Can't read superblock on 2nd try.\n"); |
| 1497 | goto failed_mount; |
| 1498 | } |
| 1499 | es = (struct ext3_super_block *)(((char *)bh->b_data) + offset); |
| 1500 | sbi->s_es = es; |
| 1501 | if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) { |
| 1502 | printk (KERN_ERR |
| 1503 | "EXT3-fs: Magic mismatch, very weird !\n"); |
| 1504 | goto failed_mount; |
| 1505 | } |
| 1506 | } |
| 1507 | |
| 1508 | sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits); |
| 1509 | |
| 1510 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) { |
| 1511 | sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE; |
| 1512 | sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO; |
| 1513 | } else { |
| 1514 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); |
| 1515 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); |
| 1516 | if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) || |
| 1517 | (sbi->s_inode_size & (sbi->s_inode_size - 1)) || |
| 1518 | (sbi->s_inode_size > blocksize)) { |
| 1519 | printk (KERN_ERR |
| 1520 | "EXT3-fs: unsupported inode size: %d\n", |
| 1521 | sbi->s_inode_size); |
| 1522 | goto failed_mount; |
| 1523 | } |
| 1524 | } |
| 1525 | sbi->s_frag_size = EXT3_MIN_FRAG_SIZE << |
| 1526 | le32_to_cpu(es->s_log_frag_size); |
| 1527 | if (blocksize != sbi->s_frag_size) { |
| 1528 | printk(KERN_ERR |
| 1529 | "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n", |
| 1530 | sbi->s_frag_size, blocksize); |
| 1531 | goto failed_mount; |
| 1532 | } |
| 1533 | sbi->s_frags_per_block = 1; |
| 1534 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
| 1535 | sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); |
| 1536 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
| 1537 | if (EXT3_INODE_SIZE(sb) == 0) |
| 1538 | goto cantfind_ext3; |
| 1539 | sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb); |
| 1540 | if (sbi->s_inodes_per_block == 0) |
| 1541 | goto cantfind_ext3; |
| 1542 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
| 1543 | sbi->s_inodes_per_block; |
| 1544 | sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc); |
| 1545 | sbi->s_sbh = bh; |
| 1546 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
| 1547 | sbi->s_addr_per_block_bits = log2(EXT3_ADDR_PER_BLOCK(sb)); |
| 1548 | sbi->s_desc_per_block_bits = log2(EXT3_DESC_PER_BLOCK(sb)); |
| 1549 | for (i=0; i < 4; i++) |
| 1550 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
| 1551 | sbi->s_def_hash_version = es->s_def_hash_version; |
| 1552 | |
| 1553 | if (sbi->s_blocks_per_group > blocksize * 8) { |
| 1554 | printk (KERN_ERR |
| 1555 | "EXT3-fs: #blocks per group too big: %lu\n", |
| 1556 | sbi->s_blocks_per_group); |
| 1557 | goto failed_mount; |
| 1558 | } |
| 1559 | if (sbi->s_frags_per_group > blocksize * 8) { |
| 1560 | printk (KERN_ERR |
| 1561 | "EXT3-fs: #fragments per group too big: %lu\n", |
| 1562 | sbi->s_frags_per_group); |
| 1563 | goto failed_mount; |
| 1564 | } |
| 1565 | if (sbi->s_inodes_per_group > blocksize * 8) { |
| 1566 | printk (KERN_ERR |
| 1567 | "EXT3-fs: #inodes per group too big: %lu\n", |
| 1568 | sbi->s_inodes_per_group); |
| 1569 | goto failed_mount; |
| 1570 | } |
| 1571 | |
Mingming Cao | fcd5df3 | 2006-06-25 05:47:50 -0700 | [diff] [blame] | 1572 | if (le32_to_cpu(es->s_blocks_count) > |
| 1573 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
| 1574 | printk(KERN_ERR "EXT3-fs: filesystem on %s:" |
| 1575 | " too large to mount safely\n", sb->s_id); |
| 1576 | if (sizeof(sector_t) < 8) |
| 1577 | printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not " |
| 1578 | "enabled\n"); |
| 1579 | goto failed_mount; |
| 1580 | } |
| 1581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | if (EXT3_BLOCKS_PER_GROUP(sb) == 0) |
| 1583 | goto cantfind_ext3; |
| 1584 | sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) - |
| 1585 | le32_to_cpu(es->s_first_data_block) + |
| 1586 | EXT3_BLOCKS_PER_GROUP(sb) - 1) / |
| 1587 | EXT3_BLOCKS_PER_GROUP(sb); |
| 1588 | db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) / |
| 1589 | EXT3_DESC_PER_BLOCK(sb); |
| 1590 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), |
| 1591 | GFP_KERNEL); |
| 1592 | if (sbi->s_group_desc == NULL) { |
| 1593 | printk (KERN_ERR "EXT3-fs: not enough memory\n"); |
| 1594 | goto failed_mount; |
| 1595 | } |
| 1596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | bgl_lock_init(&sbi->s_blockgroup_lock); |
| 1598 | |
| 1599 | for (i = 0; i < db_count; i++) { |
| 1600 | block = descriptor_loc(sb, logic_sb_block, i); |
| 1601 | sbi->s_group_desc[i] = sb_bread(sb, block); |
| 1602 | if (!sbi->s_group_desc[i]) { |
| 1603 | printk (KERN_ERR "EXT3-fs: " |
| 1604 | "can't read group descriptor %d\n", i); |
| 1605 | db_count = i; |
| 1606 | goto failed_mount2; |
| 1607 | } |
| 1608 | } |
| 1609 | if (!ext3_check_descriptors (sb)) { |
Theodore Ts'o | d2e5b13 | 2006-06-25 05:47:52 -0700 | [diff] [blame] | 1610 | printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | goto failed_mount2; |
| 1612 | } |
| 1613 | sbi->s_gdb_count = db_count; |
| 1614 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
| 1615 | spin_lock_init(&sbi->s_next_gen_lock); |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1616 | |
| 1617 | percpu_counter_init(&sbi->s_freeblocks_counter, |
| 1618 | ext3_count_free_blocks(sb)); |
| 1619 | percpu_counter_init(&sbi->s_freeinodes_counter, |
| 1620 | ext3_count_free_inodes(sb)); |
| 1621 | percpu_counter_init(&sbi->s_dirs_counter, |
| 1622 | ext3_count_dirs(sb)); |
| 1623 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | /* per fileystem reservation list head & lock */ |
| 1625 | spin_lock_init(&sbi->s_rsv_window_lock); |
| 1626 | sbi->s_rsv_window_root = RB_ROOT; |
| 1627 | /* Add a single, static dummy reservation to the start of the |
| 1628 | * reservation window list --- it gives us a placeholder for |
| 1629 | * append-at-start-of-list which makes the allocation logic |
| 1630 | * _much_ simpler. */ |
| 1631 | sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; |
| 1632 | sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; |
| 1633 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; |
| 1634 | sbi->s_rsv_window_head.rsv_goal_size = 0; |
| 1635 | ext3_rsv_window_add(sb, &sbi->s_rsv_window_head); |
| 1636 | |
| 1637 | /* |
| 1638 | * set up enough so that it can read an inode |
| 1639 | */ |
| 1640 | sb->s_op = &ext3_sops; |
| 1641 | sb->s_export_op = &ext3_export_ops; |
| 1642 | sb->s_xattr = ext3_xattr_handlers; |
| 1643 | #ifdef CONFIG_QUOTA |
| 1644 | sb->s_qcop = &ext3_qctl_operations; |
| 1645 | sb->dq_op = &ext3_quota_operations; |
| 1646 | #endif |
| 1647 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
| 1648 | |
| 1649 | sb->s_root = NULL; |
| 1650 | |
| 1651 | needs_recovery = (es->s_last_orphan != 0 || |
| 1652 | EXT3_HAS_INCOMPAT_FEATURE(sb, |
| 1653 | EXT3_FEATURE_INCOMPAT_RECOVER)); |
| 1654 | |
| 1655 | /* |
| 1656 | * The first inode we look at is the journal inode. Don't try |
| 1657 | * root first: it may be modified in the journal! |
| 1658 | */ |
| 1659 | if (!test_opt(sb, NOLOAD) && |
| 1660 | EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 1661 | if (ext3_load_journal(sb, es, journal_devnum)) |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1662 | goto failed_mount3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | } else if (journal_inum) { |
| 1664 | if (ext3_create_journal(sb, es, journal_inum)) |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1665 | goto failed_mount3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | } else { |
| 1667 | if (!silent) |
| 1668 | printk (KERN_ERR |
| 1669 | "ext3: No journal on filesystem on %s\n", |
| 1670 | sb->s_id); |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1671 | goto failed_mount3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | } |
| 1673 | |
| 1674 | /* We have now updated the journal if required, so we can |
| 1675 | * validate the data journaling mode. */ |
| 1676 | switch (test_opt(sb, DATA_FLAGS)) { |
| 1677 | case 0: |
| 1678 | /* No mode set, assume a default based on the journal |
| 1679 | capabilities: ORDERED_DATA if the journal can |
| 1680 | cope, else JOURNAL_DATA */ |
| 1681 | if (journal_check_available_features |
| 1682 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) |
| 1683 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
| 1684 | else |
| 1685 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
| 1686 | break; |
| 1687 | |
| 1688 | case EXT3_MOUNT_ORDERED_DATA: |
| 1689 | case EXT3_MOUNT_WRITEBACK_DATA: |
| 1690 | if (!journal_check_available_features |
| 1691 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) { |
| 1692 | printk(KERN_ERR "EXT3-fs: Journal does not support " |
| 1693 | "requested data journaling mode\n"); |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1694 | goto failed_mount4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | } |
| 1696 | default: |
| 1697 | break; |
| 1698 | } |
| 1699 | |
| 1700 | if (test_opt(sb, NOBH)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) { |
| 1702 | printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - " |
| 1703 | "its supported only with writeback mode\n"); |
| 1704 | clear_opt(sbi->s_mount_opt, NOBH); |
| 1705 | } |
| 1706 | } |
| 1707 | /* |
| 1708 | * The journal_load will have done any necessary log recovery, |
| 1709 | * so we can safely mount the rest of the filesystem now. |
| 1710 | */ |
| 1711 | |
| 1712 | root = iget(sb, EXT3_ROOT_INO); |
| 1713 | sb->s_root = d_alloc_root(root); |
| 1714 | if (!sb->s_root) { |
| 1715 | printk(KERN_ERR "EXT3-fs: get root inode failed\n"); |
| 1716 | iput(root); |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1717 | goto failed_mount4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | } |
| 1719 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
| 1720 | dput(sb->s_root); |
| 1721 | sb->s_root = NULL; |
| 1722 | printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n"); |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1723 | goto failed_mount4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | } |
| 1725 | |
| 1726 | ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY); |
| 1727 | /* |
| 1728 | * akpm: core read_super() calls in here with the superblock locked. |
| 1729 | * That deadlocks, because orphan cleanup needs to lock the superblock |
| 1730 | * in numerous places. Here we just pop the lock - it's relatively |
| 1731 | * harmless, because we are now ready to accept write_super() requests, |
| 1732 | * and aviro says that's the only reason for hanging onto the |
| 1733 | * superblock lock. |
| 1734 | */ |
| 1735 | EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS; |
| 1736 | ext3_orphan_cleanup(sb, es); |
| 1737 | EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS; |
| 1738 | if (needs_recovery) |
| 1739 | printk (KERN_INFO "EXT3-fs: recovery complete.\n"); |
| 1740 | ext3_mark_recovery_complete(sb, es); |
| 1741 | printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n", |
| 1742 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal": |
| 1743 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered": |
| 1744 | "writeback"); |
| 1745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | lock_kernel(); |
| 1747 | return 0; |
| 1748 | |
| 1749 | cantfind_ext3: |
| 1750 | if (!silent) |
| 1751 | printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n", |
| 1752 | sb->s_id); |
| 1753 | goto failed_mount; |
| 1754 | |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1755 | failed_mount4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | journal_destroy(sbi->s_journal); |
Mingming Cao | 0216bfc | 2006-06-23 02:05:41 -0700 | [diff] [blame] | 1757 | failed_mount3: |
| 1758 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
| 1759 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
| 1760 | percpu_counter_destroy(&sbi->s_dirs_counter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | failed_mount2: |
| 1762 | for (i = 0; i < db_count; i++) |
| 1763 | brelse(sbi->s_group_desc[i]); |
| 1764 | kfree(sbi->s_group_desc); |
| 1765 | failed_mount: |
| 1766 | #ifdef CONFIG_QUOTA |
| 1767 | for (i = 0; i < MAXQUOTAS; i++) |
| 1768 | kfree(sbi->s_qf_names[i]); |
| 1769 | #endif |
| 1770 | ext3_blkdev_remove(sbi); |
| 1771 | brelse(bh); |
| 1772 | out_fail: |
| 1773 | sb->s_fs_info = NULL; |
| 1774 | kfree(sbi); |
| 1775 | lock_kernel(); |
| 1776 | return -EINVAL; |
| 1777 | } |
| 1778 | |
| 1779 | /* |
| 1780 | * Setup any per-fs journal parameters now. We'll do this both on |
| 1781 | * initial mount, once the journal has been initialised but before we've |
| 1782 | * done any recovery; and again on any subsequent remount. |
| 1783 | */ |
| 1784 | static void ext3_init_journal_params(struct super_block *sb, journal_t *journal) |
| 1785 | { |
| 1786 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
| 1787 | |
| 1788 | if (sbi->s_commit_interval) |
| 1789 | journal->j_commit_interval = sbi->s_commit_interval; |
| 1790 | /* We could also set up an ext3-specific default for the commit |
| 1791 | * interval here, but for now we'll just fall back to the jbd |
| 1792 | * default. */ |
| 1793 | |
| 1794 | spin_lock(&journal->j_state_lock); |
| 1795 | if (test_opt(sb, BARRIER)) |
| 1796 | journal->j_flags |= JFS_BARRIER; |
| 1797 | else |
| 1798 | journal->j_flags &= ~JFS_BARRIER; |
| 1799 | spin_unlock(&journal->j_state_lock); |
| 1800 | } |
| 1801 | |
| 1802 | static journal_t *ext3_get_journal(struct super_block *sb, int journal_inum) |
| 1803 | { |
| 1804 | struct inode *journal_inode; |
| 1805 | journal_t *journal; |
| 1806 | |
| 1807 | /* First, test for the existence of a valid inode on disk. Bad |
| 1808 | * things happen if we iget() an unused inode, as the subsequent |
| 1809 | * iput() will try to delete it. */ |
| 1810 | |
| 1811 | journal_inode = iget(sb, journal_inum); |
| 1812 | if (!journal_inode) { |
| 1813 | printk(KERN_ERR "EXT3-fs: no journal found.\n"); |
| 1814 | return NULL; |
| 1815 | } |
| 1816 | if (!journal_inode->i_nlink) { |
| 1817 | make_bad_inode(journal_inode); |
| 1818 | iput(journal_inode); |
| 1819 | printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n"); |
| 1820 | return NULL; |
| 1821 | } |
| 1822 | |
| 1823 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", |
| 1824 | journal_inode, journal_inode->i_size); |
| 1825 | if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) { |
| 1826 | printk(KERN_ERR "EXT3-fs: invalid journal inode.\n"); |
| 1827 | iput(journal_inode); |
| 1828 | return NULL; |
| 1829 | } |
| 1830 | |
| 1831 | journal = journal_init_inode(journal_inode); |
| 1832 | if (!journal) { |
| 1833 | printk(KERN_ERR "EXT3-fs: Could not load journal inode\n"); |
| 1834 | iput(journal_inode); |
| 1835 | return NULL; |
| 1836 | } |
| 1837 | journal->j_private = sb; |
| 1838 | ext3_init_journal_params(sb, journal); |
| 1839 | return journal; |
| 1840 | } |
| 1841 | |
| 1842 | static journal_t *ext3_get_dev_journal(struct super_block *sb, |
| 1843 | dev_t j_dev) |
| 1844 | { |
| 1845 | struct buffer_head * bh; |
| 1846 | journal_t *journal; |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 1847 | ext3_fsblk_t start; |
Mingming Cao | 1c2bf37 | 2006-06-25 05:48:06 -0700 | [diff] [blame] | 1848 | ext3_fsblk_t len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | int hblock, blocksize; |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 1850 | ext3_fsblk_t sb_block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | unsigned long offset; |
| 1852 | struct ext3_super_block * es; |
| 1853 | struct block_device *bdev; |
| 1854 | |
| 1855 | bdev = ext3_blkdev_get(j_dev); |
| 1856 | if (bdev == NULL) |
| 1857 | return NULL; |
| 1858 | |
| 1859 | if (bd_claim(bdev, sb)) { |
| 1860 | printk(KERN_ERR |
| 1861 | "EXT3: failed to claim external journal device.\n"); |
| 1862 | blkdev_put(bdev); |
| 1863 | return NULL; |
| 1864 | } |
| 1865 | |
| 1866 | blocksize = sb->s_blocksize; |
| 1867 | hblock = bdev_hardsect_size(bdev); |
| 1868 | if (blocksize < hblock) { |
| 1869 | printk(KERN_ERR |
| 1870 | "EXT3-fs: blocksize too small for journal device.\n"); |
| 1871 | goto out_bdev; |
| 1872 | } |
| 1873 | |
| 1874 | sb_block = EXT3_MIN_BLOCK_SIZE / blocksize; |
| 1875 | offset = EXT3_MIN_BLOCK_SIZE % blocksize; |
| 1876 | set_blocksize(bdev, blocksize); |
| 1877 | if (!(bh = __bread(bdev, sb_block, blocksize))) { |
| 1878 | printk(KERN_ERR "EXT3-fs: couldn't read superblock of " |
| 1879 | "external journal\n"); |
| 1880 | goto out_bdev; |
| 1881 | } |
| 1882 | |
| 1883 | es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); |
| 1884 | if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) || |
| 1885 | !(le32_to_cpu(es->s_feature_incompat) & |
| 1886 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
| 1887 | printk(KERN_ERR "EXT3-fs: external journal has " |
| 1888 | "bad superblock\n"); |
| 1889 | brelse(bh); |
| 1890 | goto out_bdev; |
| 1891 | } |
| 1892 | |
| 1893 | if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
| 1894 | printk(KERN_ERR "EXT3-fs: journal UUID does not match\n"); |
| 1895 | brelse(bh); |
| 1896 | goto out_bdev; |
| 1897 | } |
| 1898 | |
| 1899 | len = le32_to_cpu(es->s_blocks_count); |
| 1900 | start = sb_block + 1; |
| 1901 | brelse(bh); /* we're done with the superblock */ |
| 1902 | |
| 1903 | journal = journal_init_dev(bdev, sb->s_bdev, |
| 1904 | start, len, blocksize); |
| 1905 | if (!journal) { |
| 1906 | printk(KERN_ERR "EXT3-fs: failed to create device journal\n"); |
| 1907 | goto out_bdev; |
| 1908 | } |
| 1909 | journal->j_private = sb; |
| 1910 | ll_rw_block(READ, 1, &journal->j_sb_buffer); |
| 1911 | wait_on_buffer(journal->j_sb_buffer); |
| 1912 | if (!buffer_uptodate(journal->j_sb_buffer)) { |
| 1913 | printk(KERN_ERR "EXT3-fs: I/O error on journal device\n"); |
| 1914 | goto out_journal; |
| 1915 | } |
| 1916 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { |
| 1917 | printk(KERN_ERR "EXT3-fs: External journal has more than one " |
| 1918 | "user (unsupported) - %d\n", |
| 1919 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
| 1920 | goto out_journal; |
| 1921 | } |
| 1922 | EXT3_SB(sb)->journal_bdev = bdev; |
| 1923 | ext3_init_journal_params(sb, journal); |
| 1924 | return journal; |
| 1925 | out_journal: |
| 1926 | journal_destroy(journal); |
| 1927 | out_bdev: |
| 1928 | ext3_blkdev_put(bdev); |
| 1929 | return NULL; |
| 1930 | } |
| 1931 | |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 1932 | static int ext3_load_journal(struct super_block *sb, |
| 1933 | struct ext3_super_block *es, |
| 1934 | unsigned long journal_devnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | { |
| 1936 | journal_t *journal; |
| 1937 | int journal_inum = le32_to_cpu(es->s_journal_inum); |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 1938 | dev_t journal_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | int err = 0; |
| 1940 | int really_read_only; |
| 1941 | |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 1942 | if (journal_devnum && |
| 1943 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
| 1944 | printk(KERN_INFO "EXT3-fs: external journal device major/minor " |
| 1945 | "numbers have changed\n"); |
| 1946 | journal_dev = new_decode_dev(journal_devnum); |
| 1947 | } else |
| 1948 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); |
| 1949 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | really_read_only = bdev_read_only(sb->s_bdev); |
| 1951 | |
| 1952 | /* |
| 1953 | * Are we loading a blank journal or performing recovery after a |
| 1954 | * crash? For recovery, we need to check in advance whether we |
| 1955 | * can get read-write access to the device. |
| 1956 | */ |
| 1957 | |
| 1958 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) { |
| 1959 | if (sb->s_flags & MS_RDONLY) { |
| 1960 | printk(KERN_INFO "EXT3-fs: INFO: recovery " |
| 1961 | "required on readonly filesystem.\n"); |
| 1962 | if (really_read_only) { |
| 1963 | printk(KERN_ERR "EXT3-fs: write access " |
| 1964 | "unavailable, cannot proceed.\n"); |
| 1965 | return -EROFS; |
| 1966 | } |
| 1967 | printk (KERN_INFO "EXT3-fs: write access will " |
| 1968 | "be enabled during recovery.\n"); |
| 1969 | } |
| 1970 | } |
| 1971 | |
| 1972 | if (journal_inum && journal_dev) { |
| 1973 | printk(KERN_ERR "EXT3-fs: filesystem has both journal " |
| 1974 | "and inode journals!\n"); |
| 1975 | return -EINVAL; |
| 1976 | } |
| 1977 | |
| 1978 | if (journal_inum) { |
| 1979 | if (!(journal = ext3_get_journal(sb, journal_inum))) |
| 1980 | return -EINVAL; |
| 1981 | } else { |
| 1982 | if (!(journal = ext3_get_dev_journal(sb, journal_dev))) |
| 1983 | return -EINVAL; |
| 1984 | } |
| 1985 | |
| 1986 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
| 1987 | err = journal_update_format(journal); |
| 1988 | if (err) { |
| 1989 | printk(KERN_ERR "EXT3-fs: error updating journal.\n"); |
| 1990 | journal_destroy(journal); |
| 1991 | return err; |
| 1992 | } |
| 1993 | } |
| 1994 | |
| 1995 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) |
| 1996 | err = journal_wipe(journal, !really_read_only); |
| 1997 | if (!err) |
| 1998 | err = journal_load(journal); |
| 1999 | |
| 2000 | if (err) { |
| 2001 | printk(KERN_ERR "EXT3-fs: error loading journal.\n"); |
| 2002 | journal_destroy(journal); |
| 2003 | return err; |
| 2004 | } |
| 2005 | |
| 2006 | EXT3_SB(sb)->s_journal = journal; |
| 2007 | ext3_clear_journal_err(sb, es); |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 2008 | |
| 2009 | if (journal_devnum && |
| 2010 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
| 2011 | es->s_journal_dev = cpu_to_le32(journal_devnum); |
| 2012 | sb->s_dirt = 1; |
| 2013 | |
| 2014 | /* Make sure we flush the recovery flag to disk. */ |
| 2015 | ext3_commit_super(sb, es, 1); |
| 2016 | } |
| 2017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | return 0; |
| 2019 | } |
| 2020 | |
| 2021 | static int ext3_create_journal(struct super_block * sb, |
| 2022 | struct ext3_super_block * es, |
| 2023 | int journal_inum) |
| 2024 | { |
| 2025 | journal_t *journal; |
| 2026 | |
| 2027 | if (sb->s_flags & MS_RDONLY) { |
| 2028 | printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to " |
| 2029 | "create journal.\n"); |
| 2030 | return -EROFS; |
| 2031 | } |
| 2032 | |
| 2033 | if (!(journal = ext3_get_journal(sb, journal_inum))) |
| 2034 | return -EINVAL; |
| 2035 | |
| 2036 | printk(KERN_INFO "EXT3-fs: creating new journal on inode %d\n", |
| 2037 | journal_inum); |
| 2038 | |
| 2039 | if (journal_create(journal)) { |
| 2040 | printk(KERN_ERR "EXT3-fs: error creating journal.\n"); |
| 2041 | journal_destroy(journal); |
| 2042 | return -EIO; |
| 2043 | } |
| 2044 | |
| 2045 | EXT3_SB(sb)->s_journal = journal; |
| 2046 | |
| 2047 | ext3_update_dynamic_rev(sb); |
| 2048 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); |
| 2049 | EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL); |
| 2050 | |
| 2051 | es->s_journal_inum = cpu_to_le32(journal_inum); |
| 2052 | sb->s_dirt = 1; |
| 2053 | |
| 2054 | /* Make sure we flush the recovery flag to disk. */ |
| 2055 | ext3_commit_super(sb, es, 1); |
| 2056 | |
| 2057 | return 0; |
| 2058 | } |
| 2059 | |
| 2060 | static void ext3_commit_super (struct super_block * sb, |
| 2061 | struct ext3_super_block * es, |
| 2062 | int sync) |
| 2063 | { |
| 2064 | struct buffer_head *sbh = EXT3_SB(sb)->s_sbh; |
| 2065 | |
| 2066 | if (!sbh) |
| 2067 | return; |
| 2068 | es->s_wtime = cpu_to_le32(get_seconds()); |
| 2069 | es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb)); |
| 2070 | es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb)); |
| 2071 | BUFFER_TRACE(sbh, "marking dirty"); |
| 2072 | mark_buffer_dirty(sbh); |
| 2073 | if (sync) |
| 2074 | sync_dirty_buffer(sbh); |
| 2075 | } |
| 2076 | |
| 2077 | |
| 2078 | /* |
| 2079 | * Have we just finished recovery? If so, and if we are mounting (or |
| 2080 | * remounting) the filesystem readonly, then we will end up with a |
| 2081 | * consistent fs on disk. Record that fact. |
| 2082 | */ |
| 2083 | static void ext3_mark_recovery_complete(struct super_block * sb, |
| 2084 | struct ext3_super_block * es) |
| 2085 | { |
| 2086 | journal_t *journal = EXT3_SB(sb)->s_journal; |
| 2087 | |
| 2088 | journal_lock_updates(journal); |
| 2089 | journal_flush(journal); |
| 2090 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) && |
| 2091 | sb->s_flags & MS_RDONLY) { |
| 2092 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); |
| 2093 | sb->s_dirt = 0; |
| 2094 | ext3_commit_super(sb, es, 1); |
| 2095 | } |
| 2096 | journal_unlock_updates(journal); |
| 2097 | } |
| 2098 | |
| 2099 | /* |
| 2100 | * If we are mounting (or read-write remounting) a filesystem whose journal |
| 2101 | * has recorded an error from a previous lifetime, move that error to the |
| 2102 | * main filesystem now. |
| 2103 | */ |
| 2104 | static void ext3_clear_journal_err(struct super_block * sb, |
| 2105 | struct ext3_super_block * es) |
| 2106 | { |
| 2107 | journal_t *journal; |
| 2108 | int j_errno; |
| 2109 | const char *errstr; |
| 2110 | |
| 2111 | journal = EXT3_SB(sb)->s_journal; |
| 2112 | |
| 2113 | /* |
| 2114 | * Now check for any error status which may have been recorded in the |
| 2115 | * journal by a prior ext3_error() or ext3_abort() |
| 2116 | */ |
| 2117 | |
| 2118 | j_errno = journal_errno(journal); |
| 2119 | if (j_errno) { |
| 2120 | char nbuf[16]; |
| 2121 | |
| 2122 | errstr = ext3_decode_error(sb, j_errno, nbuf); |
| 2123 | ext3_warning(sb, __FUNCTION__, "Filesystem error recorded " |
| 2124 | "from previous mount: %s", errstr); |
| 2125 | ext3_warning(sb, __FUNCTION__, "Marking fs in need of " |
| 2126 | "filesystem check."); |
| 2127 | |
| 2128 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; |
| 2129 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); |
| 2130 | ext3_commit_super (sb, es, 1); |
| 2131 | |
| 2132 | journal_clear_err(journal); |
| 2133 | } |
| 2134 | } |
| 2135 | |
| 2136 | /* |
| 2137 | * Force the running and committing transactions to commit, |
| 2138 | * and wait on the commit. |
| 2139 | */ |
| 2140 | int ext3_force_commit(struct super_block *sb) |
| 2141 | { |
| 2142 | journal_t *journal; |
| 2143 | int ret; |
| 2144 | |
| 2145 | if (sb->s_flags & MS_RDONLY) |
| 2146 | return 0; |
| 2147 | |
| 2148 | journal = EXT3_SB(sb)->s_journal; |
| 2149 | sb->s_dirt = 0; |
| 2150 | ret = ext3_journal_force_commit(journal); |
| 2151 | return ret; |
| 2152 | } |
| 2153 | |
| 2154 | /* |
| 2155 | * Ext3 always journals updates to the superblock itself, so we don't |
| 2156 | * have to propagate any other updates to the superblock on disk at this |
| 2157 | * point. Just start an async writeback to get the buffers on their way |
| 2158 | * to the disk. |
| 2159 | * |
| 2160 | * This implicitly triggers the writebehind on sync(). |
| 2161 | */ |
| 2162 | |
| 2163 | static void ext3_write_super (struct super_block * sb) |
| 2164 | { |
Ingo Molnar | 7892f2f | 2006-01-09 15:59:25 -0800 | [diff] [blame] | 2165 | if (mutex_trylock(&sb->s_lock) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | BUG(); |
| 2167 | sb->s_dirt = 0; |
| 2168 | } |
| 2169 | |
| 2170 | static int ext3_sync_fs(struct super_block *sb, int wait) |
| 2171 | { |
| 2172 | tid_t target; |
| 2173 | |
| 2174 | sb->s_dirt = 0; |
| 2175 | if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { |
| 2176 | if (wait) |
| 2177 | log_wait_commit(EXT3_SB(sb)->s_journal, target); |
| 2178 | } |
| 2179 | return 0; |
| 2180 | } |
| 2181 | |
| 2182 | /* |
| 2183 | * LVM calls this function before a (read-only) snapshot is created. This |
| 2184 | * gives us a chance to flush the journal completely and mark the fs clean. |
| 2185 | */ |
| 2186 | static void ext3_write_super_lockfs(struct super_block *sb) |
| 2187 | { |
| 2188 | sb->s_dirt = 0; |
| 2189 | |
| 2190 | if (!(sb->s_flags & MS_RDONLY)) { |
| 2191 | journal_t *journal = EXT3_SB(sb)->s_journal; |
| 2192 | |
| 2193 | /* Now we set up the journal barrier. */ |
| 2194 | journal_lock_updates(journal); |
| 2195 | journal_flush(journal); |
| 2196 | |
| 2197 | /* Journal blocked and flushed, clear needs_recovery flag. */ |
| 2198 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); |
| 2199 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); |
| 2200 | } |
| 2201 | } |
| 2202 | |
| 2203 | /* |
| 2204 | * Called by LVM after the snapshot is done. We need to reset the RECOVER |
| 2205 | * flag here, even though the filesystem is not technically dirty yet. |
| 2206 | */ |
| 2207 | static void ext3_unlockfs(struct super_block *sb) |
| 2208 | { |
| 2209 | if (!(sb->s_flags & MS_RDONLY)) { |
| 2210 | lock_super(sb); |
| 2211 | /* Reser the needs_recovery flag before the fs is unlocked. */ |
| 2212 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); |
| 2213 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); |
| 2214 | unlock_super(sb); |
| 2215 | journal_unlock_updates(EXT3_SB(sb)->s_journal); |
| 2216 | } |
| 2217 | } |
| 2218 | |
| 2219 | static int ext3_remount (struct super_block * sb, int * flags, char * data) |
| 2220 | { |
| 2221 | struct ext3_super_block * es; |
| 2222 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 2223 | ext3_fsblk_t n_blocks_count = 0; |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 2224 | unsigned long old_sb_flags; |
| 2225 | struct ext3_mount_options old_opts; |
| 2226 | int err; |
| 2227 | #ifdef CONFIG_QUOTA |
| 2228 | int i; |
| 2229 | #endif |
| 2230 | |
| 2231 | /* Store the original options */ |
| 2232 | old_sb_flags = sb->s_flags; |
| 2233 | old_opts.s_mount_opt = sbi->s_mount_opt; |
| 2234 | old_opts.s_resuid = sbi->s_resuid; |
| 2235 | old_opts.s_resgid = sbi->s_resgid; |
| 2236 | old_opts.s_commit_interval = sbi->s_commit_interval; |
| 2237 | #ifdef CONFIG_QUOTA |
| 2238 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; |
| 2239 | for (i = 0; i < MAXQUOTAS; i++) |
| 2240 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; |
| 2241 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | |
| 2243 | /* |
| 2244 | * Allow the "check" option to be passed as a remount option. |
| 2245 | */ |
Johann Lombardi | 71b9625 | 2006-01-08 01:03:20 -0800 | [diff] [blame] | 2246 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 2247 | err = -EINVAL; |
| 2248 | goto restore_opts; |
| 2249 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | |
| 2251 | if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) |
| 2252 | ext3_abort(sb, __FUNCTION__, "Abort forced by user"); |
| 2253 | |
| 2254 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
| 2255 | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
| 2256 | |
| 2257 | es = sbi->s_es; |
| 2258 | |
| 2259 | ext3_init_journal_params(sb, sbi->s_journal); |
| 2260 | |
| 2261 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || |
| 2262 | n_blocks_count > le32_to_cpu(es->s_blocks_count)) { |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 2263 | if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) { |
| 2264 | err = -EROFS; |
| 2265 | goto restore_opts; |
| 2266 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | |
| 2268 | if (*flags & MS_RDONLY) { |
| 2269 | /* |
| 2270 | * First of all, the unconditional stuff we have to do |
| 2271 | * to disable replay of the journal when we next remount |
| 2272 | */ |
| 2273 | sb->s_flags |= MS_RDONLY; |
| 2274 | |
| 2275 | /* |
| 2276 | * OK, test if we are remounting a valid rw partition |
| 2277 | * readonly, and if so set the rdonly flag and then |
| 2278 | * mark the partition as valid again. |
| 2279 | */ |
| 2280 | if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) && |
| 2281 | (sbi->s_mount_state & EXT3_VALID_FS)) |
| 2282 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
| 2283 | |
| 2284 | ext3_mark_recovery_complete(sb, es); |
| 2285 | } else { |
| 2286 | __le32 ret; |
| 2287 | if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb, |
| 2288 | ~EXT3_FEATURE_RO_COMPAT_SUPP))) { |
| 2289 | printk(KERN_WARNING "EXT3-fs: %s: couldn't " |
| 2290 | "remount RDWR because of unsupported " |
| 2291 | "optional features (%x).\n", |
| 2292 | sb->s_id, le32_to_cpu(ret)); |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 2293 | err = -EROFS; |
| 2294 | goto restore_opts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | } |
| 2296 | /* |
| 2297 | * Mounting a RDONLY partition read-write, so reread |
| 2298 | * and store the current valid flag. (It may have |
| 2299 | * been changed by e2fsck since we originally mounted |
| 2300 | * the partition.) |
| 2301 | */ |
| 2302 | ext3_clear_journal_err(sb, es); |
| 2303 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 2304 | if ((ret = ext3_group_extend(sb, es, n_blocks_count))) { |
| 2305 | err = ret; |
| 2306 | goto restore_opts; |
| 2307 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | if (!ext3_setup_super (sb, es, 0)) |
| 2309 | sb->s_flags &= ~MS_RDONLY; |
| 2310 | } |
| 2311 | } |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 2312 | #ifdef CONFIG_QUOTA |
| 2313 | /* Release old quota file names */ |
| 2314 | for (i = 0; i < MAXQUOTAS; i++) |
| 2315 | if (old_opts.s_qf_names[i] && |
| 2316 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) |
| 2317 | kfree(old_opts.s_qf_names[i]); |
| 2318 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | return 0; |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 2320 | restore_opts: |
| 2321 | sb->s_flags = old_sb_flags; |
| 2322 | sbi->s_mount_opt = old_opts.s_mount_opt; |
| 2323 | sbi->s_resuid = old_opts.s_resuid; |
| 2324 | sbi->s_resgid = old_opts.s_resgid; |
| 2325 | sbi->s_commit_interval = old_opts.s_commit_interval; |
| 2326 | #ifdef CONFIG_QUOTA |
| 2327 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; |
| 2328 | for (i = 0; i < MAXQUOTAS; i++) { |
| 2329 | if (sbi->s_qf_names[i] && |
| 2330 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) |
| 2331 | kfree(sbi->s_qf_names[i]); |
| 2332 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
| 2333 | } |
| 2334 | #endif |
| 2335 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2336 | } |
| 2337 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2338 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2340 | struct super_block *sb = dentry->d_sb; |
Alex Tomas | 09fe316 | 2006-03-24 03:16:16 -0800 | [diff] [blame] | 2341 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
| 2342 | struct ext3_super_block *es = sbi->s_es; |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 2343 | ext3_fsblk_t overhead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | int i; |
| 2345 | |
| 2346 | if (test_opt (sb, MINIX_DF)) |
| 2347 | overhead = 0; |
| 2348 | else { |
| 2349 | unsigned long ngroups; |
| 2350 | ngroups = EXT3_SB(sb)->s_groups_count; |
| 2351 | smp_rmb(); |
| 2352 | |
| 2353 | /* |
| 2354 | * Compute the overhead (FS structures) |
| 2355 | */ |
| 2356 | |
| 2357 | /* |
| 2358 | * All of the blocks before first_data_block are |
| 2359 | * overhead |
| 2360 | */ |
| 2361 | overhead = le32_to_cpu(es->s_first_data_block); |
| 2362 | |
| 2363 | /* |
| 2364 | * Add the overhead attributed to the superblock and |
| 2365 | * block group descriptors. If the sparse superblocks |
| 2366 | * feature is turned on, then not all groups have this. |
| 2367 | */ |
| 2368 | for (i = 0; i < ngroups; i++) { |
| 2369 | overhead += ext3_bg_has_super(sb, i) + |
| 2370 | ext3_bg_num_gdb(sb, i); |
| 2371 | cond_resched(); |
| 2372 | } |
| 2373 | |
| 2374 | /* |
| 2375 | * Every block group has an inode bitmap, a block |
| 2376 | * bitmap, and an inode table. |
| 2377 | */ |
| 2378 | overhead += (ngroups * (2 + EXT3_SB(sb)->s_itb_per_group)); |
| 2379 | } |
| 2380 | |
| 2381 | buf->f_type = EXT3_SUPER_MAGIC; |
| 2382 | buf->f_bsize = sb->s_blocksize; |
| 2383 | buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead; |
Alex Tomas | 09fe316 | 2006-03-24 03:16:16 -0800 | [diff] [blame] | 2384 | buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2385 | buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); |
| 2386 | if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) |
| 2387 | buf->f_bavail = 0; |
| 2388 | buf->f_files = le32_to_cpu(es->s_inodes_count); |
Alex Tomas | 09fe316 | 2006-03-24 03:16:16 -0800 | [diff] [blame] | 2389 | buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2390 | buf->f_namelen = EXT3_NAME_LEN; |
| 2391 | return 0; |
| 2392 | } |
| 2393 | |
| 2394 | /* Helper function for writing quotas on sync - we need to start transaction before quota file |
| 2395 | * is locked for write. Otherwise the are possible deadlocks: |
| 2396 | * Process 1 Process 2 |
| 2397 | * ext3_create() quota_sync() |
| 2398 | * journal_start() write_dquot() |
Ingo Molnar | d3be915 | 2006-03-23 03:00:29 -0800 | [diff] [blame] | 2399 | * DQUOT_INIT() down(dqio_mutex) |
| 2400 | * down(dqio_mutex) journal_start() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2401 | * |
| 2402 | */ |
| 2403 | |
| 2404 | #ifdef CONFIG_QUOTA |
| 2405 | |
| 2406 | static inline struct inode *dquot_to_inode(struct dquot *dquot) |
| 2407 | { |
| 2408 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; |
| 2409 | } |
| 2410 | |
| 2411 | static int ext3_dquot_initialize(struct inode *inode, int type) |
| 2412 | { |
| 2413 | handle_t *handle; |
| 2414 | int ret, err; |
| 2415 | |
| 2416 | /* We may create quota structure so we need to reserve enough blocks */ |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 2417 | handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS(inode->i_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | if (IS_ERR(handle)) |
| 2419 | return PTR_ERR(handle); |
| 2420 | ret = dquot_initialize(inode, type); |
| 2421 | err = ext3_journal_stop(handle); |
| 2422 | if (!ret) |
| 2423 | ret = err; |
| 2424 | return ret; |
| 2425 | } |
| 2426 | |
| 2427 | static int ext3_dquot_drop(struct inode *inode) |
| 2428 | { |
| 2429 | handle_t *handle; |
| 2430 | int ret, err; |
| 2431 | |
| 2432 | /* We may delete quota structure so we need to reserve enough blocks */ |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 2433 | handle = ext3_journal_start(inode, 2*EXT3_QUOTA_DEL_BLOCKS(inode->i_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2434 | if (IS_ERR(handle)) |
| 2435 | return PTR_ERR(handle); |
| 2436 | ret = dquot_drop(inode); |
| 2437 | err = ext3_journal_stop(handle); |
| 2438 | if (!ret) |
| 2439 | ret = err; |
| 2440 | return ret; |
| 2441 | } |
| 2442 | |
| 2443 | static int ext3_write_dquot(struct dquot *dquot) |
| 2444 | { |
| 2445 | int ret, err; |
| 2446 | handle_t *handle; |
| 2447 | struct inode *inode; |
| 2448 | |
| 2449 | inode = dquot_to_inode(dquot); |
| 2450 | handle = ext3_journal_start(inode, |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 2451 | EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | if (IS_ERR(handle)) |
| 2453 | return PTR_ERR(handle); |
| 2454 | ret = dquot_commit(dquot); |
| 2455 | err = ext3_journal_stop(handle); |
| 2456 | if (!ret) |
| 2457 | ret = err; |
| 2458 | return ret; |
| 2459 | } |
| 2460 | |
| 2461 | static int ext3_acquire_dquot(struct dquot *dquot) |
| 2462 | { |
| 2463 | int ret, err; |
| 2464 | handle_t *handle; |
| 2465 | |
| 2466 | handle = ext3_journal_start(dquot_to_inode(dquot), |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 2467 | EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | if (IS_ERR(handle)) |
| 2469 | return PTR_ERR(handle); |
| 2470 | ret = dquot_acquire(dquot); |
| 2471 | err = ext3_journal_stop(handle); |
| 2472 | if (!ret) |
| 2473 | ret = err; |
| 2474 | return ret; |
| 2475 | } |
| 2476 | |
| 2477 | static int ext3_release_dquot(struct dquot *dquot) |
| 2478 | { |
| 2479 | int ret, err; |
| 2480 | handle_t *handle; |
| 2481 | |
| 2482 | handle = ext3_journal_start(dquot_to_inode(dquot), |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 2483 | EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2484 | if (IS_ERR(handle)) |
| 2485 | return PTR_ERR(handle); |
| 2486 | ret = dquot_release(dquot); |
| 2487 | err = ext3_journal_stop(handle); |
| 2488 | if (!ret) |
| 2489 | ret = err; |
| 2490 | return ret; |
| 2491 | } |
| 2492 | |
| 2493 | static int ext3_mark_dquot_dirty(struct dquot *dquot) |
| 2494 | { |
| 2495 | /* Are we journalling quotas? */ |
| 2496 | if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
| 2497 | EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { |
| 2498 | dquot_mark_dquot_dirty(dquot); |
| 2499 | return ext3_write_dquot(dquot); |
| 2500 | } else { |
| 2501 | return dquot_mark_dquot_dirty(dquot); |
| 2502 | } |
| 2503 | } |
| 2504 | |
| 2505 | static int ext3_write_info(struct super_block *sb, int type) |
| 2506 | { |
| 2507 | int ret, err; |
| 2508 | handle_t *handle; |
| 2509 | |
| 2510 | /* Data block + inode block */ |
| 2511 | handle = ext3_journal_start(sb->s_root->d_inode, 2); |
| 2512 | if (IS_ERR(handle)) |
| 2513 | return PTR_ERR(handle); |
| 2514 | ret = dquot_commit_info(sb, type); |
| 2515 | err = ext3_journal_stop(handle); |
| 2516 | if (!ret) |
| 2517 | ret = err; |
| 2518 | return ret; |
| 2519 | } |
| 2520 | |
| 2521 | /* |
| 2522 | * Turn on quotas during mount time - we need to find |
| 2523 | * the quota file and such... |
| 2524 | */ |
| 2525 | static int ext3_quota_on_mount(struct super_block *sb, int type) |
| 2526 | { |
Christoph Hellwig | 84de856 | 2005-06-23 00:09:16 -0700 | [diff] [blame] | 2527 | return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type], |
| 2528 | EXT3_SB(sb)->s_jquota_fmt, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | } |
| 2530 | |
| 2531 | /* |
| 2532 | * Standard function to be called on quota_on |
| 2533 | */ |
| 2534 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, |
| 2535 | char *path) |
| 2536 | { |
| 2537 | int err; |
| 2538 | struct nameidata nd; |
| 2539 | |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 2540 | if (!test_opt(sb, QUOTA)) |
| 2541 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | /* Not journalling quota? */ |
| 2543 | if (!EXT3_SB(sb)->s_qf_names[USRQUOTA] && |
| 2544 | !EXT3_SB(sb)->s_qf_names[GRPQUOTA]) |
| 2545 | return vfs_quota_on(sb, type, format_id, path); |
| 2546 | err = path_lookup(path, LOOKUP_FOLLOW, &nd); |
| 2547 | if (err) |
| 2548 | return err; |
| 2549 | /* Quotafile not on the same filesystem? */ |
| 2550 | if (nd.mnt->mnt_sb != sb) { |
| 2551 | path_release(&nd); |
| 2552 | return -EXDEV; |
| 2553 | } |
| 2554 | /* Quotafile not of fs root? */ |
| 2555 | if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) |
| 2556 | printk(KERN_WARNING |
| 2557 | "EXT3-fs: Quota file not on filesystem root. " |
| 2558 | "Journalled quota will not work.\n"); |
| 2559 | path_release(&nd); |
| 2560 | return vfs_quota_on(sb, type, format_id, path); |
| 2561 | } |
| 2562 | |
| 2563 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 2564 | * acquiring the locks... As quota files are never truncated and quota code |
| 2565 | * itself serializes the operations (and noone else should touch the files) |
| 2566 | * we don't have to be afraid of races */ |
| 2567 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, |
| 2568 | size_t len, loff_t off) |
| 2569 | { |
| 2570 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 2571 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); |
| 2572 | int err = 0; |
| 2573 | int offset = off & (sb->s_blocksize - 1); |
| 2574 | int tocopy; |
| 2575 | size_t toread; |
| 2576 | struct buffer_head *bh; |
| 2577 | loff_t i_size = i_size_read(inode); |
| 2578 | |
| 2579 | if (off > i_size) |
| 2580 | return 0; |
| 2581 | if (off+len > i_size) |
| 2582 | len = i_size-off; |
| 2583 | toread = len; |
| 2584 | while (toread > 0) { |
| 2585 | tocopy = sb->s_blocksize - offset < toread ? |
| 2586 | sb->s_blocksize - offset : toread; |
| 2587 | bh = ext3_bread(NULL, inode, blk, 0, &err); |
| 2588 | if (err) |
| 2589 | return err; |
| 2590 | if (!bh) /* A hole? */ |
| 2591 | memset(data, 0, tocopy); |
| 2592 | else |
| 2593 | memcpy(data, bh->b_data+offset, tocopy); |
| 2594 | brelse(bh); |
| 2595 | offset = 0; |
| 2596 | toread -= tocopy; |
| 2597 | data += tocopy; |
| 2598 | blk++; |
| 2599 | } |
| 2600 | return len; |
| 2601 | } |
| 2602 | |
| 2603 | /* Write to quotafile (we know the transaction is already started and has |
| 2604 | * enough credits) */ |
| 2605 | static ssize_t ext3_quota_write(struct super_block *sb, int type, |
| 2606 | const char *data, size_t len, loff_t off) |
| 2607 | { |
| 2608 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 2609 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); |
| 2610 | int err = 0; |
| 2611 | int offset = off & (sb->s_blocksize - 1); |
| 2612 | int tocopy; |
| 2613 | int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL; |
| 2614 | size_t towrite = len; |
| 2615 | struct buffer_head *bh; |
| 2616 | handle_t *handle = journal_current_handle(); |
| 2617 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2618 | mutex_lock(&inode->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | while (towrite > 0) { |
| 2620 | tocopy = sb->s_blocksize - offset < towrite ? |
| 2621 | sb->s_blocksize - offset : towrite; |
| 2622 | bh = ext3_bread(handle, inode, blk, 1, &err); |
| 2623 | if (!bh) |
| 2624 | goto out; |
| 2625 | if (journal_quota) { |
| 2626 | err = ext3_journal_get_write_access(handle, bh); |
| 2627 | if (err) { |
| 2628 | brelse(bh); |
| 2629 | goto out; |
| 2630 | } |
| 2631 | } |
| 2632 | lock_buffer(bh); |
| 2633 | memcpy(bh->b_data+offset, data, tocopy); |
| 2634 | flush_dcache_page(bh->b_page); |
| 2635 | unlock_buffer(bh); |
| 2636 | if (journal_quota) |
| 2637 | err = ext3_journal_dirty_metadata(handle, bh); |
| 2638 | else { |
| 2639 | /* Always do at least ordered writes for quotas */ |
| 2640 | err = ext3_journal_dirty_data(handle, bh); |
| 2641 | mark_buffer_dirty(bh); |
| 2642 | } |
| 2643 | brelse(bh); |
| 2644 | if (err) |
| 2645 | goto out; |
| 2646 | offset = 0; |
| 2647 | towrite -= tocopy; |
| 2648 | data += tocopy; |
| 2649 | blk++; |
| 2650 | } |
| 2651 | out: |
| 2652 | if (len == towrite) |
| 2653 | return err; |
| 2654 | if (inode->i_size < off+len-towrite) { |
| 2655 | i_size_write(inode, off+len-towrite); |
| 2656 | EXT3_I(inode)->i_disksize = inode->i_size; |
| 2657 | } |
| 2658 | inode->i_version++; |
| 2659 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 2660 | ext3_mark_inode_dirty(handle, inode); |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2661 | mutex_unlock(&inode->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | return len - towrite; |
| 2663 | } |
| 2664 | |
| 2665 | #endif |
| 2666 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 2667 | static int ext3_get_sb(struct file_system_type *fs_type, |
| 2668 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 2670 | return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | } |
| 2672 | |
| 2673 | static struct file_system_type ext3_fs_type = { |
| 2674 | .owner = THIS_MODULE, |
| 2675 | .name = "ext3", |
| 2676 | .get_sb = ext3_get_sb, |
| 2677 | .kill_sb = kill_block_super, |
| 2678 | .fs_flags = FS_REQUIRES_DEV, |
| 2679 | }; |
| 2680 | |
| 2681 | static int __init init_ext3_fs(void) |
| 2682 | { |
| 2683 | int err = init_ext3_xattr(); |
| 2684 | if (err) |
| 2685 | return err; |
| 2686 | err = init_inodecache(); |
| 2687 | if (err) |
| 2688 | goto out1; |
| 2689 | err = register_filesystem(&ext3_fs_type); |
| 2690 | if (err) |
| 2691 | goto out; |
| 2692 | return 0; |
| 2693 | out: |
| 2694 | destroy_inodecache(); |
| 2695 | out1: |
| 2696 | exit_ext3_xattr(); |
| 2697 | return err; |
| 2698 | } |
| 2699 | |
| 2700 | static void __exit exit_ext3_fs(void) |
| 2701 | { |
| 2702 | unregister_filesystem(&ext3_fs_type); |
| 2703 | destroy_inodecache(); |
| 2704 | exit_ext3_xattr(); |
| 2705 | } |
| 2706 | |
| 2707 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); |
| 2708 | MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions"); |
| 2709 | MODULE_LICENSE("GPL"); |
| 2710 | module_init(init_ext3_fs) |
| 2711 | module_exit(exit_ext3_fs) |