]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
23 | #include <linux/jbd.h> | |
24 | #include <linux/ext3_fs.h> | |
25 | #include <linux/ext3_jbd.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/blkdev.h> | |
29 | #include <linux/parser.h> | |
30 | #include <linux/smp_lock.h> | |
31 | #include <linux/buffer_head.h> | |
a5694255 | 32 | #include <linux/exportfs.h> |
1da177e4 LT |
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> | |
8fc2751b | 38 | #include <linux/seq_file.h> |
3fc74269 | 39 | #include <linux/log2.h> |
381be254 | 40 | |
1da177e4 | 41 | #include <asm/uaccess.h> |
381be254 | 42 | |
1da177e4 LT |
43 | #include "xattr.h" |
44 | #include "acl.h" | |
381be254 | 45 | #include "namei.h" |
1da177e4 | 46 | |
71b96257 JL |
47 | static int ext3_load_journal(struct super_block *, struct ext3_super_block *, |
48 | unsigned long journal_devnum); | |
1da177e4 | 49 | static int ext3_create_journal(struct super_block *, struct ext3_super_block *, |
eee194e7 | 50 | unsigned int); |
1da177e4 LT |
51 | static void ext3_commit_super (struct super_block * sb, |
52 | struct ext3_super_block * es, | |
53 | int sync); | |
54 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
55 | struct ext3_super_block * es); | |
56 | static void ext3_clear_journal_err(struct super_block * sb, | |
57 | struct ext3_super_block * es); | |
58 | static int ext3_sync_fs(struct super_block *sb, int wait); | |
59 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
60 | char nbuf[16]); | |
61 | static int ext3_remount (struct super_block * sb, int * flags, char * data); | |
726c3342 | 62 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf); |
1da177e4 LT |
63 | static void ext3_unlockfs(struct super_block *sb); |
64 | static void ext3_write_super (struct super_block * sb); | |
65 | static void ext3_write_super_lockfs(struct super_block *sb); | |
66 | ||
ae6ddcc5 | 67 | /* |
1da177e4 LT |
68 | * Wrappers for journal_start/end. |
69 | * | |
70 | * The only special thing we need to do here is to make sure that all | |
71 | * journal_end calls result in the superblock being marked dirty, so | |
72 | * that sync() will call the filesystem's write_super callback if | |
ae6ddcc5 | 73 | * appropriate. |
1da177e4 LT |
74 | */ |
75 | handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks) | |
76 | { | |
77 | journal_t *journal; | |
78 | ||
79 | if (sb->s_flags & MS_RDONLY) | |
80 | return ERR_PTR(-EROFS); | |
81 | ||
82 | /* Special case here: if the journal has aborted behind our | |
83 | * backs (eg. EIO in the commit thread), then we still need to | |
84 | * take the FS itself readonly cleanly. */ | |
85 | journal = EXT3_SB(sb)->s_journal; | |
86 | if (is_journal_aborted(journal)) { | |
87 | ext3_abort(sb, __FUNCTION__, | |
88 | "Detected aborted journal"); | |
89 | return ERR_PTR(-EROFS); | |
90 | } | |
91 | ||
92 | return journal_start(journal, nblocks); | |
93 | } | |
94 | ||
ae6ddcc5 | 95 | /* |
1da177e4 LT |
96 | * The only special thing we need to do here is to make sure that all |
97 | * journal_stop calls result in the superblock being marked dirty, so | |
98 | * that sync() will call the filesystem's write_super callback if | |
ae6ddcc5 | 99 | * appropriate. |
1da177e4 LT |
100 | */ |
101 | int __ext3_journal_stop(const char *where, handle_t *handle) | |
102 | { | |
103 | struct super_block *sb; | |
104 | int err; | |
105 | int rc; | |
106 | ||
107 | sb = handle->h_transaction->t_journal->j_private; | |
108 | err = handle->h_err; | |
109 | rc = journal_stop(handle); | |
110 | ||
111 | if (!err) | |
112 | err = rc; | |
113 | if (err) | |
114 | __ext3_std_error(sb, where, err); | |
115 | return err; | |
116 | } | |
117 | ||
118 | void ext3_journal_abort_handle(const char *caller, const char *err_fn, | |
119 | struct buffer_head *bh, handle_t *handle, int err) | |
120 | { | |
121 | char nbuf[16]; | |
122 | const char *errstr = ext3_decode_error(NULL, err, nbuf); | |
123 | ||
124 | if (bh) | |
125 | BUFFER_TRACE(bh, "abort"); | |
126 | ||
127 | if (!handle->h_err) | |
128 | handle->h_err = err; | |
129 | ||
130 | if (is_handle_aborted(handle)) | |
131 | return; | |
132 | ||
133 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
134 | caller, errstr, err_fn); | |
135 | ||
136 | journal_abort_handle(handle); | |
137 | } | |
138 | ||
139 | /* Deal with the reporting of failure conditions on a filesystem such as | |
140 | * inconsistencies detected or read IO failures. | |
141 | * | |
142 | * On ext2, we can store the error state of the filesystem in the | |
143 | * superblock. That is not possible on ext3, because we may have other | |
144 | * write ordering constraints on the superblock which prevent us from | |
145 | * writing it out straight away; and given that the journal is about to | |
146 | * be aborted, we can't rely on the current, or future, transactions to | |
147 | * write out the superblock safely. | |
148 | * | |
149 | * We'll just use the journal_abort() error code to record an error in | |
150 | * the journal instead. On recovery, the journal will compain about | |
151 | * that error until we've noted it down and cleared it. | |
152 | */ | |
153 | ||
154 | static void ext3_handle_error(struct super_block *sb) | |
155 | { | |
156 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
157 | ||
158 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
159 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
160 | ||
161 | if (sb->s_flags & MS_RDONLY) | |
162 | return; | |
163 | ||
7543fc7b | 164 | if (!test_opt (sb, ERRORS_CONT)) { |
1da177e4 LT |
165 | journal_t *journal = EXT3_SB(sb)->s_journal; |
166 | ||
167 | EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT; | |
168 | if (journal) | |
169 | journal_abort(journal, -EIO); | |
170 | } | |
7543fc7b VA |
171 | if (test_opt (sb, ERRORS_RO)) { |
172 | printk (KERN_CRIT "Remounting filesystem read-only\n"); | |
173 | sb->s_flags |= MS_RDONLY; | |
174 | } | |
175 | ext3_commit_super(sb, es, 1); | |
1da177e4 LT |
176 | if (test_opt(sb, ERRORS_PANIC)) |
177 | panic("EXT3-fs (device %s): panic forced after error\n", | |
178 | sb->s_id); | |
1da177e4 LT |
179 | } |
180 | ||
181 | void ext3_error (struct super_block * sb, const char * function, | |
182 | const char * fmt, ...) | |
183 | { | |
184 | va_list args; | |
185 | ||
186 | va_start(args, fmt); | |
187 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); | |
188 | vprintk(fmt, args); | |
189 | printk("\n"); | |
190 | va_end(args); | |
191 | ||
192 | ext3_handle_error(sb); | |
193 | } | |
194 | ||
195 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
196 | char nbuf[16]) | |
197 | { | |
198 | char *errstr = NULL; | |
199 | ||
200 | switch (errno) { | |
201 | case -EIO: | |
202 | errstr = "IO failure"; | |
203 | break; | |
204 | case -ENOMEM: | |
205 | errstr = "Out of memory"; | |
206 | break; | |
207 | case -EROFS: | |
208 | if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT) | |
209 | errstr = "Journal has aborted"; | |
210 | else | |
211 | errstr = "Readonly filesystem"; | |
212 | break; | |
213 | default: | |
214 | /* If the caller passed in an extra buffer for unknown | |
215 | * errors, textualise them now. Else we just return | |
216 | * NULL. */ | |
217 | if (nbuf) { | |
218 | /* Check for truncated error codes... */ | |
219 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
220 | errstr = nbuf; | |
221 | } | |
222 | break; | |
223 | } | |
224 | ||
225 | return errstr; | |
226 | } | |
227 | ||
228 | /* __ext3_std_error decodes expected errors from journaling functions | |
229 | * automatically and invokes the appropriate error response. */ | |
230 | ||
231 | void __ext3_std_error (struct super_block * sb, const char * function, | |
232 | int errno) | |
233 | { | |
234 | char nbuf[16]; | |
30121624 | 235 | const char *errstr; |
1da177e4 | 236 | |
30121624 ST |
237 | /* Special case: if the error is EROFS, and we're not already |
238 | * inside a transaction, then there's really no point in logging | |
239 | * an error. */ | |
240 | if (errno == -EROFS && journal_current_handle() == NULL && | |
241 | (sb->s_flags & MS_RDONLY)) | |
242 | return; | |
243 | ||
244 | errstr = ext3_decode_error(sb, errno, nbuf); | |
1da177e4 LT |
245 | printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n", |
246 | sb->s_id, function, errstr); | |
247 | ||
248 | ext3_handle_error(sb); | |
249 | } | |
250 | ||
251 | /* | |
252 | * ext3_abort is a much stronger failure handler than ext3_error. The | |
253 | * abort function may be used to deal with unrecoverable failures such | |
254 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
255 | * | |
256 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
257 | * unless the error response on the fs has been set to panic in which | |
258 | * case we take the easy way out and panic immediately. | |
259 | */ | |
260 | ||
261 | void ext3_abort (struct super_block * sb, const char * function, | |
262 | const char * fmt, ...) | |
263 | { | |
264 | va_list args; | |
265 | ||
266 | printk (KERN_CRIT "ext3_abort called.\n"); | |
267 | ||
268 | va_start(args, fmt); | |
269 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); | |
270 | vprintk(fmt, args); | |
271 | printk("\n"); | |
272 | va_end(args); | |
273 | ||
274 | if (test_opt(sb, ERRORS_PANIC)) | |
275 | panic("EXT3-fs panic from previous error\n"); | |
276 | ||
277 | if (sb->s_flags & MS_RDONLY) | |
278 | return; | |
279 | ||
280 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
281 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
282 | sb->s_flags |= MS_RDONLY; | |
283 | EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT; | |
284 | journal_abort(EXT3_SB(sb)->s_journal, -EIO); | |
285 | } | |
286 | ||
287 | void ext3_warning (struct super_block * sb, const char * function, | |
288 | const char * fmt, ...) | |
289 | { | |
290 | va_list args; | |
291 | ||
292 | va_start(args, fmt); | |
293 | printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ", | |
294 | sb->s_id, function); | |
295 | vprintk(fmt, args); | |
296 | printk("\n"); | |
297 | va_end(args); | |
298 | } | |
299 | ||
300 | void ext3_update_dynamic_rev(struct super_block *sb) | |
301 | { | |
302 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
303 | ||
304 | if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV) | |
305 | return; | |
306 | ||
307 | ext3_warning(sb, __FUNCTION__, | |
308 | "updating to rev %d because of new feature flag, " | |
309 | "running e2fsck is recommended", | |
310 | EXT3_DYNAMIC_REV); | |
311 | ||
312 | es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO); | |
313 | es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE); | |
314 | es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV); | |
315 | /* leave es->s_feature_*compat flags alone */ | |
316 | /* es->s_uuid will be set by e2fsck if empty */ | |
317 | ||
318 | /* | |
319 | * The rest of the superblock fields should be zero, and if not it | |
320 | * means they are likely already in use, so leave them alone. We | |
321 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
322 | */ | |
323 | } | |
324 | ||
325 | /* | |
326 | * Open the external journal device | |
327 | */ | |
328 | static struct block_device *ext3_blkdev_get(dev_t dev) | |
329 | { | |
330 | struct block_device *bdev; | |
331 | char b[BDEVNAME_SIZE]; | |
332 | ||
333 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
334 | if (IS_ERR(bdev)) | |
335 | goto fail; | |
336 | return bdev; | |
337 | ||
338 | fail: | |
339 | printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n", | |
340 | __bdevname(dev, b), PTR_ERR(bdev)); | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Release the journal device | |
346 | */ | |
347 | static int ext3_blkdev_put(struct block_device *bdev) | |
348 | { | |
349 | bd_release(bdev); | |
350 | return blkdev_put(bdev); | |
351 | } | |
352 | ||
353 | static int ext3_blkdev_remove(struct ext3_sb_info *sbi) | |
354 | { | |
355 | struct block_device *bdev; | |
356 | int ret = -ENODEV; | |
357 | ||
358 | bdev = sbi->journal_bdev; | |
359 | if (bdev) { | |
360 | ret = ext3_blkdev_put(bdev); | |
361 | sbi->journal_bdev = NULL; | |
362 | } | |
363 | return ret; | |
364 | } | |
365 | ||
366 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
367 | { | |
368 | return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode; | |
369 | } | |
370 | ||
371 | static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi) | |
372 | { | |
373 | struct list_head *l; | |
374 | ||
ae6ddcc5 | 375 | printk(KERN_ERR "sb orphan head is %d\n", |
1da177e4 LT |
376 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
377 | ||
378 | printk(KERN_ERR "sb_info orphan list:\n"); | |
379 | list_for_each(l, &sbi->s_orphan) { | |
380 | struct inode *inode = orphan_list_entry(l); | |
381 | printk(KERN_ERR " " | |
eee194e7 | 382 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
1da177e4 | 383 | inode->i_sb->s_id, inode->i_ino, inode, |
ae6ddcc5 | 384 | inode->i_mode, inode->i_nlink, |
1da177e4 LT |
385 | NEXT_ORPHAN(inode)); |
386 | } | |
387 | } | |
388 | ||
389 | static void ext3_put_super (struct super_block * sb) | |
390 | { | |
391 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
392 | struct ext3_super_block *es = sbi->s_es; | |
393 | int i; | |
394 | ||
395 | ext3_xattr_put_super(sb); | |
396 | journal_destroy(sbi->s_journal); | |
397 | if (!(sb->s_flags & MS_RDONLY)) { | |
398 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
399 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
400 | BUFFER_TRACE(sbi->s_sbh, "marking dirty"); | |
401 | mark_buffer_dirty(sbi->s_sbh); | |
402 | ext3_commit_super(sb, es, 1); | |
403 | } | |
404 | ||
405 | for (i = 0; i < sbi->s_gdb_count; i++) | |
406 | brelse(sbi->s_group_desc[i]); | |
407 | kfree(sbi->s_group_desc); | |
408 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
409 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
410 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
411 | brelse(sbi->s_sbh); | |
412 | #ifdef CONFIG_QUOTA | |
413 | for (i = 0; i < MAXQUOTAS; i++) | |
414 | kfree(sbi->s_qf_names[i]); | |
415 | #endif | |
416 | ||
417 | /* Debugging code just in case the in-memory inode orphan list | |
418 | * isn't empty. The on-disk one can be non-empty if we've | |
419 | * detected an error and taken the fs readonly, but the | |
420 | * in-memory list had better be clean by this point. */ | |
421 | if (!list_empty(&sbi->s_orphan)) | |
422 | dump_orphan_list(sb, sbi); | |
423 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
424 | ||
f98393a6 | 425 | invalidate_bdev(sb->s_bdev); |
1da177e4 LT |
426 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
427 | /* | |
428 | * Invalidate the journal device's buffers. We don't want them | |
429 | * floating about in memory - the physical journal device may | |
430 | * hotswapped, and it breaks the `ro-after' testing code. | |
431 | */ | |
432 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 433 | invalidate_bdev(sbi->journal_bdev); |
1da177e4 LT |
434 | ext3_blkdev_remove(sbi); |
435 | } | |
436 | sb->s_fs_info = NULL; | |
437 | kfree(sbi); | |
438 | return; | |
439 | } | |
440 | ||
e18b890b | 441 | static struct kmem_cache *ext3_inode_cachep; |
1da177e4 LT |
442 | |
443 | /* | |
444 | * Called inside transaction, so use GFP_NOFS | |
445 | */ | |
446 | static struct inode *ext3_alloc_inode(struct super_block *sb) | |
447 | { | |
448 | struct ext3_inode_info *ei; | |
449 | ||
e6b4f8da | 450 | ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS); |
1da177e4 LT |
451 | if (!ei) |
452 | return NULL; | |
453 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
454 | ei->i_acl = EXT3_ACL_NOT_CACHED; | |
455 | ei->i_default_acl = EXT3_ACL_NOT_CACHED; | |
456 | #endif | |
457 | ei->i_block_alloc_info = NULL; | |
458 | ei->vfs_inode.i_version = 1; | |
459 | return &ei->vfs_inode; | |
460 | } | |
461 | ||
462 | static void ext3_destroy_inode(struct inode *inode) | |
463 | { | |
9f7dd93d VA |
464 | if (!list_empty(&(EXT3_I(inode)->i_orphan))) { |
465 | printk("EXT3 Inode %p: orphan list check failed!\n", | |
466 | EXT3_I(inode)); | |
467 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
468 | EXT3_I(inode), sizeof(struct ext3_inode_info), | |
469 | false); | |
470 | dump_stack(); | |
471 | } | |
1da177e4 LT |
472 | kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); |
473 | } | |
474 | ||
4ba9b9d0 | 475 | static void init_once(struct kmem_cache * cachep, void *foo) |
1da177e4 LT |
476 | { |
477 | struct ext3_inode_info *ei = (struct ext3_inode_info *) foo; | |
478 | ||
a35afb83 | 479 | INIT_LIST_HEAD(&ei->i_orphan); |
1da177e4 | 480 | #ifdef CONFIG_EXT3_FS_XATTR |
a35afb83 | 481 | init_rwsem(&ei->xattr_sem); |
1da177e4 | 482 | #endif |
a35afb83 CL |
483 | mutex_init(&ei->truncate_mutex); |
484 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 485 | } |
ae6ddcc5 | 486 | |
1da177e4 LT |
487 | static int init_inodecache(void) |
488 | { | |
489 | ext3_inode_cachep = kmem_cache_create("ext3_inode_cache", | |
490 | sizeof(struct ext3_inode_info), | |
fffb60f9 PJ |
491 | 0, (SLAB_RECLAIM_ACCOUNT| |
492 | SLAB_MEM_SPREAD), | |
20c2df83 | 493 | init_once); |
1da177e4 LT |
494 | if (ext3_inode_cachep == NULL) |
495 | return -ENOMEM; | |
496 | return 0; | |
497 | } | |
498 | ||
499 | static void destroy_inodecache(void) | |
500 | { | |
1a1d92c1 | 501 | kmem_cache_destroy(ext3_inode_cachep); |
1da177e4 LT |
502 | } |
503 | ||
504 | static void ext3_clear_inode(struct inode *inode) | |
505 | { | |
506 | struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info; | |
507 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
e6022603 AM |
508 | if (EXT3_I(inode)->i_acl && |
509 | EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) { | |
510 | posix_acl_release(EXT3_I(inode)->i_acl); | |
511 | EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED; | |
512 | } | |
513 | if (EXT3_I(inode)->i_default_acl && | |
514 | EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) { | |
515 | posix_acl_release(EXT3_I(inode)->i_default_acl); | |
516 | EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED; | |
517 | } | |
1da177e4 LT |
518 | #endif |
519 | ext3_discard_reservation(inode); | |
520 | EXT3_I(inode)->i_block_alloc_info = NULL; | |
e6022603 AM |
521 | if (unlikely(rsv)) |
522 | kfree(rsv); | |
1da177e4 LT |
523 | } |
524 | ||
6cd37cda | 525 | static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) |
8fc2751b | 526 | { |
6cd37cda | 527 | #if defined(CONFIG_QUOTA) |
275abf5b | 528 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
8fc2751b | 529 | |
8fc2751b MB |
530 | if (sbi->s_jquota_fmt) |
531 | seq_printf(seq, ",jqfmt=%s", | |
532 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); | |
533 | ||
534 | if (sbi->s_qf_names[USRQUOTA]) | |
535 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
536 | ||
537 | if (sbi->s_qf_names[GRPQUOTA]) | |
538 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
539 | ||
540 | if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) | |
541 | seq_puts(seq, ",usrquota"); | |
542 | ||
543 | if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) | |
544 | seq_puts(seq, ",grpquota"); | |
545 | #endif | |
6cd37cda PO |
546 | } |
547 | ||
571beed8 MS |
548 | /* |
549 | * Show an option if | |
550 | * - it's set to a non-default value OR | |
551 | * - if the per-sb default is different from the global default | |
552 | */ | |
6cd37cda PO |
553 | static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) |
554 | { | |
555 | struct super_block *sb = vfs->mnt_sb; | |
571beed8 MS |
556 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
557 | struct ext3_super_block *es = sbi->s_es; | |
558 | unsigned long def_mount_opts; | |
559 | ||
560 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
561 | ||
562 | if (sbi->s_sb_block != 1) | |
563 | seq_printf(seq, ",sb=%lu", sbi->s_sb_block); | |
564 | if (test_opt(sb, MINIX_DF)) | |
565 | seq_puts(seq, ",minixdf"); | |
566 | if (test_opt(sb, GRPID)) | |
567 | seq_puts(seq, ",grpid"); | |
568 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS)) | |
569 | seq_puts(seq, ",nogrpid"); | |
570 | if (sbi->s_resuid != EXT3_DEF_RESUID || | |
571 | le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) { | |
572 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
573 | } | |
574 | if (sbi->s_resgid != EXT3_DEF_RESGID || | |
575 | le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) { | |
576 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
577 | } | |
578 | if (test_opt(sb, ERRORS_CONT)) { | |
579 | int def_errors = le16_to_cpu(es->s_errors); | |
580 | ||
581 | if (def_errors == EXT3_ERRORS_PANIC || | |
582 | def_errors == EXT3_ERRORS_RO) { | |
583 | seq_puts(seq, ",errors=continue"); | |
584 | } | |
585 | } | |
586 | if (test_opt(sb, ERRORS_RO)) | |
587 | seq_puts(seq, ",errors=remount-ro"); | |
588 | if (test_opt(sb, ERRORS_PANIC)) | |
589 | seq_puts(seq, ",errors=panic"); | |
590 | if (test_opt(sb, NO_UID32)) | |
591 | seq_puts(seq, ",nouid32"); | |
592 | if (test_opt(sb, DEBUG)) | |
593 | seq_puts(seq, ",debug"); | |
594 | if (test_opt(sb, OLDALLOC)) | |
595 | seq_puts(seq, ",oldalloc"); | |
596 | #ifdef CONFIG_EXT3_FS_XATTR | |
597 | if (test_opt(sb, XATTR_USER)) | |
598 | seq_puts(seq, ",user_xattr"); | |
599 | if (!test_opt(sb, XATTR_USER) && | |
600 | (def_mount_opts & EXT3_DEFM_XATTR_USER)) { | |
601 | seq_puts(seq, ",nouser_xattr"); | |
602 | } | |
603 | #endif | |
604 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
605 | if (test_opt(sb, POSIX_ACL)) | |
606 | seq_puts(seq, ",acl"); | |
607 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL)) | |
608 | seq_puts(seq, ",noacl"); | |
609 | #endif | |
610 | if (!test_opt(sb, RESERVATION)) | |
611 | seq_puts(seq, ",noreservation"); | |
612 | if (sbi->s_commit_interval) { | |
613 | seq_printf(seq, ",commit=%u", | |
614 | (unsigned) (sbi->s_commit_interval / HZ)); | |
615 | } | |
616 | if (test_opt(sb, BARRIER)) | |
617 | seq_puts(seq, ",barrier=1"); | |
618 | if (test_opt(sb, NOBH)) | |
619 | seq_puts(seq, ",nobh"); | |
6cd37cda PO |
620 | |
621 | if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA) | |
622 | seq_puts(seq, ",data=journal"); | |
623 | else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA) | |
624 | seq_puts(seq, ",data=ordered"); | |
625 | else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA) | |
626 | seq_puts(seq, ",data=writeback"); | |
627 | ||
628 | ext3_show_quota_options(seq, sb); | |
8fc2751b MB |
629 | |
630 | return 0; | |
631 | } | |
1da177e4 | 632 | |
fdb36673 | 633 | |
74af0baa CH |
634 | static struct inode *ext3_nfs_get_inode(struct super_block *sb, |
635 | u64 ino, u32 generation) | |
fdb36673 | 636 | { |
fdb36673 | 637 | struct inode *inode; |
fdb36673 N |
638 | |
639 | if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO) | |
640 | return ERR_PTR(-ESTALE); | |
641 | if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) | |
642 | return ERR_PTR(-ESTALE); | |
643 | ||
644 | /* iget isn't really right if the inode is currently unallocated!! | |
645 | * | |
646 | * ext3_read_inode will return a bad_inode if the inode had been | |
647 | * deleted, so we should be safe. | |
648 | * | |
649 | * Currently we don't know the generation for parent directory, so | |
650 | * a generation of 0 means "accept any" | |
651 | */ | |
652 | inode = iget(sb, ino); | |
653 | if (inode == NULL) | |
654 | return ERR_PTR(-ENOMEM); | |
655 | if (is_bad_inode(inode) || | |
656 | (generation && inode->i_generation != generation)) { | |
657 | iput(inode); | |
658 | return ERR_PTR(-ESTALE); | |
659 | } | |
74af0baa CH |
660 | |
661 | return inode; | |
662 | } | |
663 | ||
664 | static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
665 | int fh_len, int fh_type) | |
666 | { | |
667 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
668 | ext3_nfs_get_inode); | |
669 | } | |
670 | ||
671 | static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid, | |
672 | int fh_len, int fh_type) | |
673 | { | |
674 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
675 | ext3_nfs_get_inode); | |
fdb36673 N |
676 | } |
677 | ||
8fc2751b | 678 | #ifdef CONFIG_QUOTA |
1da177e4 LT |
679 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
680 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) | |
681 | ||
682 | static int ext3_dquot_initialize(struct inode *inode, int type); | |
683 | static int ext3_dquot_drop(struct inode *inode); | |
684 | static int ext3_write_dquot(struct dquot *dquot); | |
685 | static int ext3_acquire_dquot(struct dquot *dquot); | |
686 | static int ext3_release_dquot(struct dquot *dquot); | |
687 | static int ext3_mark_dquot_dirty(struct dquot *dquot); | |
688 | static int ext3_write_info(struct super_block *sb, int type); | |
689 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, char *path); | |
690 | static int ext3_quota_on_mount(struct super_block *sb, int type); | |
691 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
692 | size_t len, loff_t off); | |
693 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
694 | const char *data, size_t len, loff_t off); | |
695 | ||
696 | static struct dquot_operations ext3_quota_operations = { | |
697 | .initialize = ext3_dquot_initialize, | |
698 | .drop = ext3_dquot_drop, | |
699 | .alloc_space = dquot_alloc_space, | |
700 | .alloc_inode = dquot_alloc_inode, | |
701 | .free_space = dquot_free_space, | |
702 | .free_inode = dquot_free_inode, | |
703 | .transfer = dquot_transfer, | |
704 | .write_dquot = ext3_write_dquot, | |
705 | .acquire_dquot = ext3_acquire_dquot, | |
706 | .release_dquot = ext3_release_dquot, | |
707 | .mark_dirty = ext3_mark_dquot_dirty, | |
708 | .write_info = ext3_write_info | |
709 | }; | |
710 | ||
711 | static struct quotactl_ops ext3_qctl_operations = { | |
712 | .quota_on = ext3_quota_on, | |
713 | .quota_off = vfs_quota_off, | |
714 | .quota_sync = vfs_quota_sync, | |
715 | .get_info = vfs_get_dqinfo, | |
716 | .set_info = vfs_set_dqinfo, | |
717 | .get_dqblk = vfs_get_dqblk, | |
718 | .set_dqblk = vfs_set_dqblk | |
719 | }; | |
720 | #endif | |
721 | ||
ee9b6d61 | 722 | static const struct super_operations ext3_sops = { |
1da177e4 LT |
723 | .alloc_inode = ext3_alloc_inode, |
724 | .destroy_inode = ext3_destroy_inode, | |
725 | .read_inode = ext3_read_inode, | |
726 | .write_inode = ext3_write_inode, | |
727 | .dirty_inode = ext3_dirty_inode, | |
728 | .delete_inode = ext3_delete_inode, | |
729 | .put_super = ext3_put_super, | |
730 | .write_super = ext3_write_super, | |
731 | .sync_fs = ext3_sync_fs, | |
732 | .write_super_lockfs = ext3_write_super_lockfs, | |
733 | .unlockfs = ext3_unlockfs, | |
734 | .statfs = ext3_statfs, | |
735 | .remount_fs = ext3_remount, | |
736 | .clear_inode = ext3_clear_inode, | |
8fc2751b | 737 | .show_options = ext3_show_options, |
1da177e4 LT |
738 | #ifdef CONFIG_QUOTA |
739 | .quota_read = ext3_quota_read, | |
740 | .quota_write = ext3_quota_write, | |
741 | #endif | |
742 | }; | |
743 | ||
39655164 | 744 | static const struct export_operations ext3_export_ops = { |
74af0baa CH |
745 | .fh_to_dentry = ext3_fh_to_dentry, |
746 | .fh_to_parent = ext3_fh_to_parent, | |
1da177e4 LT |
747 | .get_parent = ext3_get_parent, |
748 | }; | |
749 | ||
750 | enum { | |
751 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
752 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
2860b733 | 753 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, |
1da177e4 | 754 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
ade1a29e | 755 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, |
71b96257 | 756 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, |
1da177e4 LT |
757 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
758 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, | |
1f54587b | 759 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, |
8fc2751b MB |
760 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, |
761 | Opt_grpquota | |
1da177e4 LT |
762 | }; |
763 | ||
764 | static match_table_t tokens = { | |
765 | {Opt_bsd_df, "bsddf"}, | |
766 | {Opt_minix_df, "minixdf"}, | |
767 | {Opt_grpid, "grpid"}, | |
768 | {Opt_grpid, "bsdgroups"}, | |
769 | {Opt_nogrpid, "nogrpid"}, | |
770 | {Opt_nogrpid, "sysvgroups"}, | |
771 | {Opt_resgid, "resgid=%u"}, | |
772 | {Opt_resuid, "resuid=%u"}, | |
773 | {Opt_sb, "sb=%u"}, | |
774 | {Opt_err_cont, "errors=continue"}, | |
775 | {Opt_err_panic, "errors=panic"}, | |
776 | {Opt_err_ro, "errors=remount-ro"}, | |
777 | {Opt_nouid32, "nouid32"}, | |
778 | {Opt_nocheck, "nocheck"}, | |
779 | {Opt_nocheck, "check=none"}, | |
1da177e4 LT |
780 | {Opt_debug, "debug"}, |
781 | {Opt_oldalloc, "oldalloc"}, | |
782 | {Opt_orlov, "orlov"}, | |
783 | {Opt_user_xattr, "user_xattr"}, | |
784 | {Opt_nouser_xattr, "nouser_xattr"}, | |
785 | {Opt_acl, "acl"}, | |
786 | {Opt_noacl, "noacl"}, | |
787 | {Opt_reservation, "reservation"}, | |
788 | {Opt_noreservation, "noreservation"}, | |
789 | {Opt_noload, "noload"}, | |
790 | {Opt_nobh, "nobh"}, | |
ade1a29e | 791 | {Opt_bh, "bh"}, |
1da177e4 LT |
792 | {Opt_commit, "commit=%u"}, |
793 | {Opt_journal_update, "journal=update"}, | |
794 | {Opt_journal_inum, "journal=%u"}, | |
71b96257 | 795 | {Opt_journal_dev, "journal_dev=%u"}, |
1da177e4 LT |
796 | {Opt_abort, "abort"}, |
797 | {Opt_data_journal, "data=journal"}, | |
798 | {Opt_data_ordered, "data=ordered"}, | |
799 | {Opt_data_writeback, "data=writeback"}, | |
800 | {Opt_offusrjquota, "usrjquota="}, | |
801 | {Opt_usrjquota, "usrjquota=%s"}, | |
802 | {Opt_offgrpjquota, "grpjquota="}, | |
803 | {Opt_grpjquota, "grpjquota=%s"}, | |
804 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
805 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
8fc2751b | 806 | {Opt_grpquota, "grpquota"}, |
1f54587b JK |
807 | {Opt_noquota, "noquota"}, |
808 | {Opt_quota, "quota"}, | |
8fc2751b | 809 | {Opt_usrquota, "usrquota"}, |
1da177e4 LT |
810 | {Opt_barrier, "barrier=%u"}, |
811 | {Opt_err, NULL}, | |
812 | {Opt_resize, "resize"}, | |
813 | }; | |
814 | ||
43d23f90 | 815 | static ext3_fsblk_t get_sb_block(void **data) |
1da177e4 | 816 | { |
e9ad5620 DK |
817 | ext3_fsblk_t sb_block; |
818 | char *options = (char *) *data; | |
1da177e4 LT |
819 | |
820 | if (!options || strncmp(options, "sb=", 3) != 0) | |
821 | return 1; /* Default location */ | |
822 | options += 3; | |
43d23f90 | 823 | /*todo: use simple_strtoll with >32bit ext3 */ |
1da177e4 LT |
824 | sb_block = simple_strtoul(options, &options, 0); |
825 | if (*options && *options != ',') { | |
826 | printk("EXT3-fs: Invalid sb specification: %s\n", | |
827 | (char *) *data); | |
828 | return 1; | |
829 | } | |
830 | if (*options == ',') | |
831 | options++; | |
832 | *data = (void *) options; | |
833 | return sb_block; | |
834 | } | |
835 | ||
71b96257 | 836 | static int parse_options (char *options, struct super_block *sb, |
eee194e7 | 837 | unsigned int *inum, unsigned long *journal_devnum, |
43d23f90 | 838 | ext3_fsblk_t *n_blocks_count, int is_remount) |
1da177e4 LT |
839 | { |
840 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
841 | char * p; | |
842 | substring_t args[MAX_OPT_ARGS]; | |
843 | int data_opt = 0; | |
844 | int option; | |
845 | #ifdef CONFIG_QUOTA | |
846 | int qtype; | |
847 | char *qname; | |
848 | #endif | |
849 | ||
850 | if (!options) | |
851 | return 1; | |
852 | ||
853 | while ((p = strsep (&options, ",")) != NULL) { | |
854 | int token; | |
855 | if (!*p) | |
856 | continue; | |
857 | ||
858 | token = match_token(p, tokens, args); | |
859 | switch (token) { | |
860 | case Opt_bsd_df: | |
861 | clear_opt (sbi->s_mount_opt, MINIX_DF); | |
862 | break; | |
863 | case Opt_minix_df: | |
864 | set_opt (sbi->s_mount_opt, MINIX_DF); | |
865 | break; | |
866 | case Opt_grpid: | |
867 | set_opt (sbi->s_mount_opt, GRPID); | |
868 | break; | |
869 | case Opt_nogrpid: | |
870 | clear_opt (sbi->s_mount_opt, GRPID); | |
871 | break; | |
872 | case Opt_resuid: | |
873 | if (match_int(&args[0], &option)) | |
874 | return 0; | |
875 | sbi->s_resuid = option; | |
876 | break; | |
877 | case Opt_resgid: | |
878 | if (match_int(&args[0], &option)) | |
879 | return 0; | |
880 | sbi->s_resgid = option; | |
881 | break; | |
882 | case Opt_sb: | |
883 | /* handled by get_sb_block() instead of here */ | |
884 | /* *sb_block = match_int(&args[0]); */ | |
885 | break; | |
886 | case Opt_err_panic: | |
887 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
888 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
889 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
890 | break; | |
891 | case Opt_err_ro: | |
892 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
893 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
894 | set_opt (sbi->s_mount_opt, ERRORS_RO); | |
895 | break; | |
896 | case Opt_err_cont: | |
897 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
898 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
899 | set_opt (sbi->s_mount_opt, ERRORS_CONT); | |
900 | break; | |
901 | case Opt_nouid32: | |
902 | set_opt (sbi->s_mount_opt, NO_UID32); | |
903 | break; | |
1da177e4 LT |
904 | case Opt_nocheck: |
905 | clear_opt (sbi->s_mount_opt, CHECK); | |
906 | break; | |
907 | case Opt_debug: | |
908 | set_opt (sbi->s_mount_opt, DEBUG); | |
909 | break; | |
910 | case Opt_oldalloc: | |
911 | set_opt (sbi->s_mount_opt, OLDALLOC); | |
912 | break; | |
913 | case Opt_orlov: | |
914 | clear_opt (sbi->s_mount_opt, OLDALLOC); | |
915 | break; | |
916 | #ifdef CONFIG_EXT3_FS_XATTR | |
917 | case Opt_user_xattr: | |
918 | set_opt (sbi->s_mount_opt, XATTR_USER); | |
919 | break; | |
920 | case Opt_nouser_xattr: | |
921 | clear_opt (sbi->s_mount_opt, XATTR_USER); | |
922 | break; | |
923 | #else | |
924 | case Opt_user_xattr: | |
925 | case Opt_nouser_xattr: | |
926 | printk("EXT3 (no)user_xattr options not supported\n"); | |
927 | break; | |
928 | #endif | |
929 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
930 | case Opt_acl: | |
931 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
932 | break; | |
933 | case Opt_noacl: | |
934 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
935 | break; | |
936 | #else | |
937 | case Opt_acl: | |
938 | case Opt_noacl: | |
939 | printk("EXT3 (no)acl options not supported\n"); | |
940 | break; | |
941 | #endif | |
942 | case Opt_reservation: | |
943 | set_opt(sbi->s_mount_opt, RESERVATION); | |
944 | break; | |
945 | case Opt_noreservation: | |
946 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
947 | break; | |
948 | case Opt_journal_update: | |
949 | /* @@@ FIXME */ | |
950 | /* Eventually we will want to be able to create | |
951 | a journal file here. For now, only allow the | |
952 | user to specify an existing inode to be the | |
953 | journal file. */ | |
954 | if (is_remount) { | |
955 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
956 | "journal on remount\n"); | |
957 | return 0; | |
958 | } | |
959 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); | |
960 | break; | |
961 | case Opt_journal_inum: | |
962 | if (is_remount) { | |
963 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
964 | "journal on remount\n"); | |
965 | return 0; | |
966 | } | |
967 | if (match_int(&args[0], &option)) | |
968 | return 0; | |
969 | *inum = option; | |
970 | break; | |
71b96257 JL |
971 | case Opt_journal_dev: |
972 | if (is_remount) { | |
973 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
974 | "journal on remount\n"); | |
975 | return 0; | |
976 | } | |
977 | if (match_int(&args[0], &option)) | |
978 | return 0; | |
979 | *journal_devnum = option; | |
980 | break; | |
1da177e4 LT |
981 | case Opt_noload: |
982 | set_opt (sbi->s_mount_opt, NOLOAD); | |
983 | break; | |
984 | case Opt_commit: | |
985 | if (match_int(&args[0], &option)) | |
986 | return 0; | |
987 | if (option < 0) | |
988 | return 0; | |
989 | if (option == 0) | |
990 | option = JBD_DEFAULT_MAX_COMMIT_AGE; | |
991 | sbi->s_commit_interval = HZ * option; | |
992 | break; | |
993 | case Opt_data_journal: | |
994 | data_opt = EXT3_MOUNT_JOURNAL_DATA; | |
995 | goto datacheck; | |
996 | case Opt_data_ordered: | |
997 | data_opt = EXT3_MOUNT_ORDERED_DATA; | |
998 | goto datacheck; | |
999 | case Opt_data_writeback: | |
1000 | data_opt = EXT3_MOUNT_WRITEBACK_DATA; | |
1001 | datacheck: | |
1002 | if (is_remount) { | |
1003 | if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS) | |
1004 | != data_opt) { | |
1005 | printk(KERN_ERR | |
1006 | "EXT3-fs: cannot change data " | |
1007 | "mode on remount\n"); | |
1008 | return 0; | |
1009 | } | |
1010 | } else { | |
1011 | sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS; | |
1012 | sbi->s_mount_opt |= data_opt; | |
1013 | } | |
1014 | break; | |
1015 | #ifdef CONFIG_QUOTA | |
1016 | case Opt_usrjquota: | |
1017 | qtype = USRQUOTA; | |
1018 | goto set_qf_name; | |
1019 | case Opt_grpjquota: | |
1020 | qtype = GRPQUOTA; | |
1021 | set_qf_name: | |
1022 | if (sb_any_quota_enabled(sb)) { | |
1023 | printk(KERN_ERR | |
1024 | "EXT3-fs: Cannot change journalled " | |
1025 | "quota options when quota turned on.\n"); | |
1026 | return 0; | |
1027 | } | |
1028 | qname = match_strdup(&args[0]); | |
1029 | if (!qname) { | |
1030 | printk(KERN_ERR | |
1031 | "EXT3-fs: not enough memory for " | |
1032 | "storing quotafile name.\n"); | |
1033 | return 0; | |
1034 | } | |
1035 | if (sbi->s_qf_names[qtype] && | |
1036 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1037 | printk(KERN_ERR | |
1038 | "EXT3-fs: %s quota file already " | |
1039 | "specified.\n", QTYPE2NAME(qtype)); | |
1040 | kfree(qname); | |
1041 | return 0; | |
1042 | } | |
1043 | sbi->s_qf_names[qtype] = qname; | |
1044 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1045 | printk(KERN_ERR | |
1046 | "EXT3-fs: quotafile must be on " | |
1047 | "filesystem root.\n"); | |
1048 | kfree(sbi->s_qf_names[qtype]); | |
1049 | sbi->s_qf_names[qtype] = NULL; | |
1050 | return 0; | |
1051 | } | |
1f54587b | 1052 | set_opt(sbi->s_mount_opt, QUOTA); |
1da177e4 LT |
1053 | break; |
1054 | case Opt_offusrjquota: | |
1055 | qtype = USRQUOTA; | |
1056 | goto clear_qf_name; | |
1057 | case Opt_offgrpjquota: | |
1058 | qtype = GRPQUOTA; | |
1059 | clear_qf_name: | |
1060 | if (sb_any_quota_enabled(sb)) { | |
1061 | printk(KERN_ERR "EXT3-fs: Cannot change " | |
1062 | "journalled quota options when " | |
1063 | "quota turned on.\n"); | |
1064 | return 0; | |
1065 | } | |
08c6a96f JK |
1066 | /* |
1067 | * The space will be released later when all options | |
1068 | * are confirmed to be correct | |
1069 | */ | |
1da177e4 LT |
1070 | sbi->s_qf_names[qtype] = NULL; |
1071 | break; | |
1072 | case Opt_jqfmt_vfsold: | |
1073 | sbi->s_jquota_fmt = QFMT_VFS_OLD; | |
1074 | break; | |
1075 | case Opt_jqfmt_vfsv0: | |
1076 | sbi->s_jquota_fmt = QFMT_VFS_V0; | |
1077 | break; | |
1f54587b | 1078 | case Opt_quota: |
8fc2751b MB |
1079 | case Opt_usrquota: |
1080 | set_opt(sbi->s_mount_opt, QUOTA); | |
1081 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1082 | break; | |
1083 | case Opt_grpquota: | |
1f54587b | 1084 | set_opt(sbi->s_mount_opt, QUOTA); |
8fc2751b | 1085 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
1f54587b JK |
1086 | break; |
1087 | case Opt_noquota: | |
1088 | if (sb_any_quota_enabled(sb)) { | |
1089 | printk(KERN_ERR "EXT3-fs: Cannot change quota " | |
1090 | "options when quota turned on.\n"); | |
1091 | return 0; | |
1092 | } | |
1093 | clear_opt(sbi->s_mount_opt, QUOTA); | |
8fc2751b MB |
1094 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1095 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1f54587b | 1096 | break; |
1da177e4 | 1097 | #else |
8fc2751b MB |
1098 | case Opt_quota: |
1099 | case Opt_usrquota: | |
1100 | case Opt_grpquota: | |
1da177e4 LT |
1101 | case Opt_usrjquota: |
1102 | case Opt_grpjquota: | |
1103 | case Opt_offusrjquota: | |
1104 | case Opt_offgrpjquota: | |
1105 | case Opt_jqfmt_vfsold: | |
1106 | case Opt_jqfmt_vfsv0: | |
1107 | printk(KERN_ERR | |
1108 | "EXT3-fs: journalled quota options not " | |
1109 | "supported.\n"); | |
1110 | break; | |
1f54587b JK |
1111 | case Opt_noquota: |
1112 | break; | |
1da177e4 LT |
1113 | #endif |
1114 | case Opt_abort: | |
1115 | set_opt(sbi->s_mount_opt, ABORT); | |
1116 | break; | |
1117 | case Opt_barrier: | |
1118 | if (match_int(&args[0], &option)) | |
1119 | return 0; | |
1120 | if (option) | |
1121 | set_opt(sbi->s_mount_opt, BARRIER); | |
1122 | else | |
1123 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1124 | break; | |
1125 | case Opt_ignore: | |
1126 | break; | |
1127 | case Opt_resize: | |
08c6a96f | 1128 | if (!is_remount) { |
1da177e4 LT |
1129 | printk("EXT3-fs: resize option only available " |
1130 | "for remount\n"); | |
1131 | return 0; | |
1132 | } | |
c7f1721e KZ |
1133 | if (match_int(&args[0], &option) != 0) |
1134 | return 0; | |
1da177e4 LT |
1135 | *n_blocks_count = option; |
1136 | break; | |
1137 | case Opt_nobh: | |
1138 | set_opt(sbi->s_mount_opt, NOBH); | |
1139 | break; | |
ade1a29e BP |
1140 | case Opt_bh: |
1141 | clear_opt(sbi->s_mount_opt, NOBH); | |
1142 | break; | |
1da177e4 LT |
1143 | default: |
1144 | printk (KERN_ERR | |
1145 | "EXT3-fs: Unrecognized mount option \"%s\" " | |
1146 | "or missing value\n", p); | |
1147 | return 0; | |
1148 | } | |
1149 | } | |
1150 | #ifdef CONFIG_QUOTA | |
8fc2751b MB |
1151 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
1152 | if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) && | |
1153 | sbi->s_qf_names[USRQUOTA]) | |
1154 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1155 | ||
1156 | if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) && | |
1157 | sbi->s_qf_names[GRPQUOTA]) | |
1158 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1159 | ||
1160 | if ((sbi->s_qf_names[USRQUOTA] && | |
1161 | (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) || | |
1162 | (sbi->s_qf_names[GRPQUOTA] && | |
1163 | (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) { | |
1164 | printk(KERN_ERR "EXT3-fs: old and new quota " | |
1165 | "format mixing.\n"); | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | if (!sbi->s_jquota_fmt) { | |
1170 | printk(KERN_ERR "EXT3-fs: journalled quota format " | |
1171 | "not specified.\n"); | |
1172 | return 0; | |
1173 | } | |
1174 | } else { | |
1175 | if (sbi->s_jquota_fmt) { | |
1176 | printk(KERN_ERR "EXT3-fs: journalled quota format " | |
1177 | "specified with no journalling " | |
1178 | "enabled.\n"); | |
1179 | return 0; | |
1180 | } | |
1da177e4 LT |
1181 | } |
1182 | #endif | |
1da177e4 LT |
1183 | return 1; |
1184 | } | |
1185 | ||
1186 | static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es, | |
1187 | int read_only) | |
1188 | { | |
1189 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1190 | int res = 0; | |
1191 | ||
1192 | if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) { | |
1193 | printk (KERN_ERR "EXT3-fs warning: revision level too high, " | |
1194 | "forcing read-only mode\n"); | |
1195 | res = MS_RDONLY; | |
1196 | } | |
1197 | if (read_only) | |
1198 | return res; | |
1199 | if (!(sbi->s_mount_state & EXT3_VALID_FS)) | |
1200 | printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, " | |
1201 | "running e2fsck is recommended\n"); | |
1202 | else if ((sbi->s_mount_state & EXT3_ERROR_FS)) | |
1203 | printk (KERN_WARNING | |
1204 | "EXT3-fs warning: mounting fs with errors, " | |
1205 | "running e2fsck is recommended\n"); | |
1206 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && | |
1207 | le16_to_cpu(es->s_mnt_count) >= | |
1208 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
1209 | printk (KERN_WARNING | |
1210 | "EXT3-fs warning: maximal mount count reached, " | |
1211 | "running e2fsck is recommended\n"); | |
1212 | else if (le32_to_cpu(es->s_checkinterval) && | |
1213 | (le32_to_cpu(es->s_lastcheck) + | |
1214 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
1215 | printk (KERN_WARNING | |
1216 | "EXT3-fs warning: checktime reached, " | |
1217 | "running e2fsck is recommended\n"); | |
1218 | #if 0 | |
1219 | /* @@@ We _will_ want to clear the valid bit if we find | |
1220 | inconsistencies, to force a fsck at reboot. But for | |
1221 | a plain journaled filesystem we can keep it set as | |
1222 | valid forever! :) */ | |
1223 | es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT3_VALID_FS); | |
1224 | #endif | |
1225 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) | |
1226 | es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT); | |
1227 | es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1); | |
1228 | es->s_mtime = cpu_to_le32(get_seconds()); | |
1229 | ext3_update_dynamic_rev(sb); | |
1230 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1231 | ||
1232 | ext3_commit_super(sb, es, 1); | |
1233 | if (test_opt(sb, DEBUG)) | |
1234 | printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, " | |
1235 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", | |
1236 | sb->s_blocksize, | |
1237 | sbi->s_groups_count, | |
1238 | EXT3_BLOCKS_PER_GROUP(sb), | |
1239 | EXT3_INODES_PER_GROUP(sb), | |
1240 | sbi->s_mount_opt); | |
1241 | ||
1242 | printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id); | |
1243 | if (EXT3_SB(sb)->s_journal->j_inode == NULL) { | |
1244 | char b[BDEVNAME_SIZE]; | |
1245 | ||
1246 | printk("external journal on %s\n", | |
1247 | bdevname(EXT3_SB(sb)->s_journal->j_dev, b)); | |
1248 | } else { | |
1249 | printk("internal journal\n"); | |
1250 | } | |
1da177e4 LT |
1251 | return res; |
1252 | } | |
1253 | ||
1254 | /* Called at mount-time, super-block is locked */ | |
1255 | static int ext3_check_descriptors (struct super_block * sb) | |
1256 | { | |
1257 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
855565e8 ES |
1258 | ext3_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); |
1259 | ext3_fsblk_t last_block; | |
1da177e4 LT |
1260 | struct ext3_group_desc * gdp = NULL; |
1261 | int desc_block = 0; | |
1262 | int i; | |
1263 | ||
1264 | ext3_debug ("Checking group descriptors"); | |
1265 | ||
1266 | for (i = 0; i < sbi->s_groups_count; i++) | |
1267 | { | |
855565e8 ES |
1268 | if (i == sbi->s_groups_count - 1) |
1269 | last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1; | |
1270 | else | |
1271 | last_block = first_block + | |
1272 | (EXT3_BLOCKS_PER_GROUP(sb) - 1); | |
1273 | ||
1da177e4 LT |
1274 | if ((i % EXT3_DESC_PER_BLOCK(sb)) == 0) |
1275 | gdp = (struct ext3_group_desc *) | |
1276 | sbi->s_group_desc[desc_block++]->b_data; | |
855565e8 ES |
1277 | if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || |
1278 | le32_to_cpu(gdp->bg_block_bitmap) > last_block) | |
1da177e4 LT |
1279 | { |
1280 | ext3_error (sb, "ext3_check_descriptors", | |
1281 | "Block bitmap for group %d" | |
1282 | " not in group (block %lu)!", | |
1283 | i, (unsigned long) | |
1284 | le32_to_cpu(gdp->bg_block_bitmap)); | |
1285 | return 0; | |
1286 | } | |
855565e8 ES |
1287 | if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || |
1288 | le32_to_cpu(gdp->bg_inode_bitmap) > last_block) | |
1da177e4 LT |
1289 | { |
1290 | ext3_error (sb, "ext3_check_descriptors", | |
1291 | "Inode bitmap for group %d" | |
1292 | " not in group (block %lu)!", | |
1293 | i, (unsigned long) | |
1294 | le32_to_cpu(gdp->bg_inode_bitmap)); | |
1295 | return 0; | |
1296 | } | |
855565e8 | 1297 | if (le32_to_cpu(gdp->bg_inode_table) < first_block || |
780dcdb2 | 1298 | le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 > |
855565e8 | 1299 | last_block) |
1da177e4 LT |
1300 | { |
1301 | ext3_error (sb, "ext3_check_descriptors", | |
1302 | "Inode table for group %d" | |
1303 | " not in group (block %lu)!", | |
1304 | i, (unsigned long) | |
1305 | le32_to_cpu(gdp->bg_inode_table)); | |
1306 | return 0; | |
1307 | } | |
855565e8 | 1308 | first_block += EXT3_BLOCKS_PER_GROUP(sb); |
1da177e4 LT |
1309 | gdp++; |
1310 | } | |
1311 | ||
1312 | sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb)); | |
1313 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb)); | |
1314 | return 1; | |
1315 | } | |
1316 | ||
1317 | ||
1318 | /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at | |
1319 | * the superblock) which were deleted from all directories, but held open by | |
1320 | * a process at the time of a crash. We walk the list and try to delete these | |
1321 | * inodes at recovery time (only with a read-write filesystem). | |
1322 | * | |
1323 | * In order to keep the orphan inode chain consistent during traversal (in | |
1324 | * case of crash during recovery), we link each inode into the superblock | |
1325 | * orphan list_head and handle it the same way as an inode deletion during | |
1326 | * normal operation (which journals the operations for us). | |
1327 | * | |
1328 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1329 | * accidentally point at an in-use or already deleted inode. The worst that | |
1330 | * can happen in this case is that we get a "bit already cleared" message from | |
1331 | * ext3_free_inode(). The only reason we would point at a wrong inode is if | |
1332 | * e2fsck was run on this filesystem, and it must have already done the orphan | |
1333 | * inode cleanup for us, so we can safely abort without any further action. | |
1334 | */ | |
1335 | static void ext3_orphan_cleanup (struct super_block * sb, | |
1336 | struct ext3_super_block * es) | |
1337 | { | |
1338 | unsigned int s_flags = sb->s_flags; | |
1339 | int nr_orphans = 0, nr_truncates = 0; | |
1340 | #ifdef CONFIG_QUOTA | |
1341 | int i; | |
1342 | #endif | |
1343 | if (!es->s_last_orphan) { | |
1344 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1345 | return; | |
1346 | } | |
1347 | ||
a8f48a95 ES |
1348 | if (bdev_read_only(sb->s_bdev)) { |
1349 | printk(KERN_ERR "EXT3-fs: write access " | |
1350 | "unavailable, skipping orphan cleanup.\n"); | |
1351 | return; | |
1352 | } | |
1353 | ||
1da177e4 LT |
1354 | if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { |
1355 | if (es->s_last_orphan) | |
1356 | jbd_debug(1, "Errors on filesystem, " | |
1357 | "clearing orphan list.\n"); | |
1358 | es->s_last_orphan = 0; | |
1359 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1360 | return; | |
1361 | } | |
1362 | ||
1363 | if (s_flags & MS_RDONLY) { | |
1364 | printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n", | |
1365 | sb->s_id); | |
1366 | sb->s_flags &= ~MS_RDONLY; | |
1367 | } | |
1368 | #ifdef CONFIG_QUOTA | |
1369 | /* Needed for iput() to work correctly and not trash data */ | |
1370 | sb->s_flags |= MS_ACTIVE; | |
1371 | /* Turn on quotas so that they are updated correctly */ | |
1372 | for (i = 0; i < MAXQUOTAS; i++) { | |
1373 | if (EXT3_SB(sb)->s_qf_names[i]) { | |
1374 | int ret = ext3_quota_on_mount(sb, i); | |
1375 | if (ret < 0) | |
1376 | printk(KERN_ERR | |
1377 | "EXT3-fs: Cannot turn on journalled " | |
1378 | "quota: error %d\n", ret); | |
1379 | } | |
1380 | } | |
1381 | #endif | |
1382 | ||
1383 | while (es->s_last_orphan) { | |
1384 | struct inode *inode; | |
1385 | ||
1386 | if (!(inode = | |
1387 | ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) { | |
1388 | es->s_last_orphan = 0; | |
1389 | break; | |
1390 | } | |
1391 | ||
1392 | list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan); | |
1393 | DQUOT_INIT(inode); | |
1394 | if (inode->i_nlink) { | |
1395 | printk(KERN_DEBUG | |
eee194e7 | 1396 | "%s: truncating inode %lu to %Ld bytes\n", |
1da177e4 | 1397 | __FUNCTION__, inode->i_ino, inode->i_size); |
eee194e7 | 1398 | jbd_debug(2, "truncating inode %lu to %Ld bytes\n", |
1da177e4 LT |
1399 | inode->i_ino, inode->i_size); |
1400 | ext3_truncate(inode); | |
1401 | nr_truncates++; | |
1402 | } else { | |
1403 | printk(KERN_DEBUG | |
eee194e7 | 1404 | "%s: deleting unreferenced inode %lu\n", |
1da177e4 | 1405 | __FUNCTION__, inode->i_ino); |
eee194e7 | 1406 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1da177e4 LT |
1407 | inode->i_ino); |
1408 | nr_orphans++; | |
1409 | } | |
1410 | iput(inode); /* The delete magic happens here! */ | |
1411 | } | |
1412 | ||
1413 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" | |
1414 | ||
1415 | if (nr_orphans) | |
1416 | printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n", | |
1417 | sb->s_id, PLURAL(nr_orphans)); | |
1418 | if (nr_truncates) | |
1419 | printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n", | |
1420 | sb->s_id, PLURAL(nr_truncates)); | |
1421 | #ifdef CONFIG_QUOTA | |
1422 | /* Turn quotas off */ | |
1423 | for (i = 0; i < MAXQUOTAS; i++) { | |
1424 | if (sb_dqopt(sb)->files[i]) | |
1425 | vfs_quota_off(sb, i); | |
1426 | } | |
1427 | #endif | |
1428 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1429 | } | |
1430 | ||
1da177e4 LT |
1431 | /* |
1432 | * Maximal file size. There is a direct, and {,double-,triple-}indirect | |
1433 | * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. | |
1434 | * We need to be 1 filesystem block less than the 2^32 sector limit. | |
1435 | */ | |
1436 | static loff_t ext3_max_size(int bits) | |
1437 | { | |
1438 | loff_t res = EXT3_NDIR_BLOCKS; | |
fe7fdc37 AK |
1439 | int meta_blocks; |
1440 | loff_t upper_limit; | |
1441 | ||
1442 | /* This is calculated to be the largest file size for a | |
1443 | * dense, file such that the total number of | |
1da177e4 | 1444 | * sectors in the file, including data and all indirect blocks, |
fe7fdc37 AK |
1445 | * does not exceed 2^32 -1 |
1446 | * __u32 i_blocks representing the total number of | |
1447 | * 512 bytes blocks of the file | |
1448 | */ | |
1449 | upper_limit = (1LL << 32) - 1; | |
1450 | ||
1451 | /* total blocks in file system block size */ | |
1452 | upper_limit >>= (bits - 9); | |
1453 | ||
1454 | ||
1455 | /* indirect blocks */ | |
1456 | meta_blocks = 1; | |
1457 | /* double indirect blocks */ | |
1458 | meta_blocks += 1 + (1LL << (bits-2)); | |
1459 | /* tripple indirect blocks */ | |
1460 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1461 | ||
1462 | upper_limit -= meta_blocks; | |
1463 | upper_limit <<= bits; | |
1da177e4 LT |
1464 | |
1465 | res += 1LL << (bits-2); | |
1466 | res += 1LL << (2*(bits-2)); | |
1467 | res += 1LL << (3*(bits-2)); | |
1468 | res <<= bits; | |
1469 | if (res > upper_limit) | |
1470 | res = upper_limit; | |
fe7fdc37 AK |
1471 | |
1472 | if (res > MAX_LFS_FILESIZE) | |
1473 | res = MAX_LFS_FILESIZE; | |
1474 | ||
1da177e4 LT |
1475 | return res; |
1476 | } | |
1477 | ||
43d23f90 MC |
1478 | static ext3_fsblk_t descriptor_loc(struct super_block *sb, |
1479 | ext3_fsblk_t logic_sb_block, | |
1da177e4 LT |
1480 | int nr) |
1481 | { | |
1482 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 1483 | unsigned long bg, first_meta_bg; |
1da177e4 LT |
1484 | int has_super = 0; |
1485 | ||
1da177e4 LT |
1486 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
1487 | ||
1488 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) || | |
1489 | nr < first_meta_bg) | |
1490 | return (logic_sb_block + nr + 1); | |
1491 | bg = sbi->s_desc_per_block * nr; | |
1492 | if (ext3_bg_has_super(sb, bg)) | |
1493 | has_super = 1; | |
43d23f90 | 1494 | return (has_super + ext3_group_first_block_no(sb, bg)); |
1da177e4 LT |
1495 | } |
1496 | ||
1497 | ||
1498 | static int ext3_fill_super (struct super_block *sb, void *data, int silent) | |
1499 | { | |
1500 | struct buffer_head * bh; | |
1501 | struct ext3_super_block *es = NULL; | |
1502 | struct ext3_sb_info *sbi; | |
43d23f90 MC |
1503 | ext3_fsblk_t block; |
1504 | ext3_fsblk_t sb_block = get_sb_block(&data); | |
1505 | ext3_fsblk_t logic_sb_block; | |
1da177e4 | 1506 | unsigned long offset = 0; |
eee194e7 | 1507 | unsigned int journal_inum = 0; |
71b96257 | 1508 | unsigned long journal_devnum = 0; |
1da177e4 LT |
1509 | unsigned long def_mount_opts; |
1510 | struct inode *root; | |
1511 | int blocksize; | |
1512 | int hblock; | |
1513 | int db_count; | |
1514 | int i; | |
1515 | int needs_recovery; | |
1516 | __le32 features; | |
833f4077 | 1517 | int err; |
1da177e4 | 1518 | |
f8314dc6 | 1519 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
1520 | if (!sbi) |
1521 | return -ENOMEM; | |
1522 | sb->s_fs_info = sbi; | |
1da177e4 LT |
1523 | sbi->s_mount_opt = 0; |
1524 | sbi->s_resuid = EXT3_DEF_RESUID; | |
1525 | sbi->s_resgid = EXT3_DEF_RESGID; | |
571beed8 | 1526 | sbi->s_sb_block = sb_block; |
1da177e4 LT |
1527 | |
1528 | unlock_kernel(); | |
1529 | ||
1530 | blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); | |
1531 | if (!blocksize) { | |
1532 | printk(KERN_ERR "EXT3-fs: unable to set blocksize\n"); | |
1533 | goto out_fail; | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * The ext3 superblock will not be buffer aligned for other than 1kB | |
1538 | * block sizes. We need to calculate the offset from buffer start. | |
1539 | */ | |
1540 | if (blocksize != EXT3_MIN_BLOCK_SIZE) { | |
1541 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; | |
1542 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1543 | } else { | |
1544 | logic_sb_block = sb_block; | |
1545 | } | |
1546 | ||
1547 | if (!(bh = sb_bread(sb, logic_sb_block))) { | |
1548 | printk (KERN_ERR "EXT3-fs: unable to read superblock\n"); | |
1549 | goto out_fail; | |
1550 | } | |
1551 | /* | |
1552 | * Note: s_es must be initialized as soon as possible because | |
1553 | * some ext3 macro-instructions depend on its value | |
1554 | */ | |
1555 | es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); | |
1556 | sbi->s_es = es; | |
1557 | sb->s_magic = le16_to_cpu(es->s_magic); | |
1558 | if (sb->s_magic != EXT3_SUPER_MAGIC) | |
1559 | goto cantfind_ext3; | |
1560 | ||
1561 | /* Set defaults before we parse the mount options */ | |
1562 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
1563 | if (def_mount_opts & EXT3_DEFM_DEBUG) | |
1564 | set_opt(sbi->s_mount_opt, DEBUG); | |
1565 | if (def_mount_opts & EXT3_DEFM_BSDGROUPS) | |
1566 | set_opt(sbi->s_mount_opt, GRPID); | |
1567 | if (def_mount_opts & EXT3_DEFM_UID16) | |
1568 | set_opt(sbi->s_mount_opt, NO_UID32); | |
2e7842b8 | 1569 | #ifdef CONFIG_EXT3_FS_XATTR |
1da177e4 LT |
1570 | if (def_mount_opts & EXT3_DEFM_XATTR_USER) |
1571 | set_opt(sbi->s_mount_opt, XATTR_USER); | |
2e7842b8 HD |
1572 | #endif |
1573 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1da177e4 LT |
1574 | if (def_mount_opts & EXT3_DEFM_ACL) |
1575 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
2e7842b8 | 1576 | #endif |
1da177e4 LT |
1577 | if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA) |
1578 | sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA; | |
1579 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED) | |
1580 | sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA; | |
1581 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK) | |
1582 | sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA; | |
1583 | ||
1584 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC) | |
1585 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1586 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_RO) | |
1587 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
2245d7c2 DM |
1588 | else |
1589 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
1da177e4 LT |
1590 | |
1591 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
1592 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
1593 | ||
1594 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1595 | ||
71b96257 JL |
1596 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
1597 | NULL, 0)) | |
1da177e4 LT |
1598 | goto failed_mount; |
1599 | ||
1600 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1601 | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); | |
1602 | ||
1603 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV && | |
1604 | (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1605 | EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1606 | EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ae6ddcc5 | 1607 | printk(KERN_WARNING |
1da177e4 LT |
1608 | "EXT3-fs warning: feature flags set on rev 0 fs, " |
1609 | "running e2fsck is recommended\n"); | |
1610 | /* | |
1611 | * Check feature flags regardless of the revision level, since we | |
1612 | * previously didn't change the revision level when setting the flags, | |
1613 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
1614 | */ | |
1615 | features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP); | |
1616 | if (features) { | |
1617 | printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of " | |
1618 | "unsupported optional features (%x).\n", | |
1619 | sb->s_id, le32_to_cpu(features)); | |
1620 | goto failed_mount; | |
1621 | } | |
1622 | features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP); | |
1623 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
1624 | printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of " | |
1625 | "unsupported optional features (%x).\n", | |
1626 | sb->s_id, le32_to_cpu(features)); | |
1627 | goto failed_mount; | |
1628 | } | |
1629 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
1630 | ||
1631 | if (blocksize < EXT3_MIN_BLOCK_SIZE || | |
1632 | blocksize > EXT3_MAX_BLOCK_SIZE) { | |
ae6ddcc5 | 1633 | printk(KERN_ERR |
1da177e4 LT |
1634 | "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n", |
1635 | blocksize, sb->s_id); | |
1636 | goto failed_mount; | |
1637 | } | |
1638 | ||
1639 | hblock = bdev_hardsect_size(sb->s_bdev); | |
1640 | if (sb->s_blocksize != blocksize) { | |
1641 | /* | |
1642 | * Make sure the blocksize for the filesystem is larger | |
1643 | * than the hardware sectorsize for the machine. | |
1644 | */ | |
1645 | if (blocksize < hblock) { | |
1646 | printk(KERN_ERR "EXT3-fs: blocksize %d too small for " | |
1647 | "device blocksize %d.\n", blocksize, hblock); | |
1648 | goto failed_mount; | |
1649 | } | |
1650 | ||
1651 | brelse (bh); | |
0f0a89eb TS |
1652 | if (!sb_set_blocksize(sb, blocksize)) { |
1653 | printk(KERN_ERR "EXT3-fs: bad blocksize %d.\n", | |
1654 | blocksize); | |
1655 | goto out_fail; | |
1656 | } | |
1da177e4 LT |
1657 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; |
1658 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1659 | bh = sb_bread(sb, logic_sb_block); | |
1660 | if (!bh) { | |
ae6ddcc5 | 1661 | printk(KERN_ERR |
1da177e4 LT |
1662 | "EXT3-fs: Can't read superblock on 2nd try.\n"); |
1663 | goto failed_mount; | |
1664 | } | |
1665 | es = (struct ext3_super_block *)(((char *)bh->b_data) + offset); | |
1666 | sbi->s_es = es; | |
1667 | if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) { | |
ae6ddcc5 | 1668 | printk (KERN_ERR |
1da177e4 LT |
1669 | "EXT3-fs: Magic mismatch, very weird !\n"); |
1670 | goto failed_mount; | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits); | |
1675 | ||
1676 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) { | |
1677 | sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE; | |
1678 | sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO; | |
1679 | } else { | |
1680 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
1681 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
1682 | if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) || | |
3fc74269 | 1683 | (!is_power_of_2(sbi->s_inode_size)) || |
1da177e4 LT |
1684 | (sbi->s_inode_size > blocksize)) { |
1685 | printk (KERN_ERR | |
1686 | "EXT3-fs: unsupported inode size: %d\n", | |
1687 | sbi->s_inode_size); | |
1688 | goto failed_mount; | |
1689 | } | |
1690 | } | |
1691 | sbi->s_frag_size = EXT3_MIN_FRAG_SIZE << | |
1692 | le32_to_cpu(es->s_log_frag_size); | |
1693 | if (blocksize != sbi->s_frag_size) { | |
1694 | printk(KERN_ERR | |
1695 | "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n", | |
1696 | sbi->s_frag_size, blocksize); | |
1697 | goto failed_mount; | |
1698 | } | |
1699 | sbi->s_frags_per_block = 1; | |
1700 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); | |
1701 | sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); | |
1702 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); | |
b47b6f38 | 1703 | if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0) |
1da177e4 LT |
1704 | goto cantfind_ext3; |
1705 | sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb); | |
1706 | if (sbi->s_inodes_per_block == 0) | |
1707 | goto cantfind_ext3; | |
1708 | sbi->s_itb_per_group = sbi->s_inodes_per_group / | |
1709 | sbi->s_inodes_per_block; | |
1710 | sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc); | |
1711 | sbi->s_sbh = bh; | |
1712 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
f0d1b0b3 DH |
1713 | sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb)); |
1714 | sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb)); | |
1da177e4 LT |
1715 | for (i=0; i < 4; i++) |
1716 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
1717 | sbi->s_def_hash_version = es->s_def_hash_version; | |
1718 | ||
1719 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
1720 | printk (KERN_ERR | |
1721 | "EXT3-fs: #blocks per group too big: %lu\n", | |
1722 | sbi->s_blocks_per_group); | |
1723 | goto failed_mount; | |
1724 | } | |
1725 | if (sbi->s_frags_per_group > blocksize * 8) { | |
1726 | printk (KERN_ERR | |
1727 | "EXT3-fs: #fragments per group too big: %lu\n", | |
1728 | sbi->s_frags_per_group); | |
1729 | goto failed_mount; | |
1730 | } | |
1731 | if (sbi->s_inodes_per_group > blocksize * 8) { | |
1732 | printk (KERN_ERR | |
1733 | "EXT3-fs: #inodes per group too big: %lu\n", | |
1734 | sbi->s_inodes_per_group); | |
1735 | goto failed_mount; | |
1736 | } | |
1737 | ||
fcd5df35 MC |
1738 | if (le32_to_cpu(es->s_blocks_count) > |
1739 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { | |
1740 | printk(KERN_ERR "EXT3-fs: filesystem on %s:" | |
1741 | " too large to mount safely\n", sb->s_id); | |
1742 | if (sizeof(sector_t) < 8) | |
1743 | printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not " | |
1744 | "enabled\n"); | |
1745 | goto failed_mount; | |
1746 | } | |
1747 | ||
1da177e4 LT |
1748 | if (EXT3_BLOCKS_PER_GROUP(sb) == 0) |
1749 | goto cantfind_ext3; | |
855565e8 ES |
1750 | sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - |
1751 | le32_to_cpu(es->s_first_data_block) - 1) | |
1752 | / EXT3_BLOCKS_PER_GROUP(sb)) + 1; | |
1da177e4 LT |
1753 | db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) / |
1754 | EXT3_DESC_PER_BLOCK(sb); | |
1755 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), | |
1756 | GFP_KERNEL); | |
1757 | if (sbi->s_group_desc == NULL) { | |
1758 | printk (KERN_ERR "EXT3-fs: not enough memory\n"); | |
1759 | goto failed_mount; | |
1760 | } | |
1761 | ||
1da177e4 LT |
1762 | bgl_lock_init(&sbi->s_blockgroup_lock); |
1763 | ||
1764 | for (i = 0; i < db_count; i++) { | |
1765 | block = descriptor_loc(sb, logic_sb_block, i); | |
1766 | sbi->s_group_desc[i] = sb_bread(sb, block); | |
1767 | if (!sbi->s_group_desc[i]) { | |
1768 | printk (KERN_ERR "EXT3-fs: " | |
1769 | "can't read group descriptor %d\n", i); | |
1770 | db_count = i; | |
1771 | goto failed_mount2; | |
1772 | } | |
1773 | } | |
1774 | if (!ext3_check_descriptors (sb)) { | |
d2e5b13c | 1775 | printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n"); |
1da177e4 LT |
1776 | goto failed_mount2; |
1777 | } | |
1778 | sbi->s_gdb_count = db_count; | |
1779 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1780 | spin_lock_init(&sbi->s_next_gen_lock); | |
0216bfcf | 1781 | |
833f4077 PZ |
1782 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
1783 | ext3_count_free_blocks(sb)); | |
1784 | if (!err) { | |
1785 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
1786 | ext3_count_free_inodes(sb)); | |
1787 | } | |
1788 | if (!err) { | |
1789 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
1790 | ext3_count_dirs(sb)); | |
1791 | } | |
1792 | if (err) { | |
1793 | printk(KERN_ERR "EXT3-fs: insufficient memory\n"); | |
1794 | goto failed_mount3; | |
1795 | } | |
0216bfcf | 1796 | |
1da177e4 LT |
1797 | /* per fileystem reservation list head & lock */ |
1798 | spin_lock_init(&sbi->s_rsv_window_lock); | |
1799 | sbi->s_rsv_window_root = RB_ROOT; | |
1800 | /* Add a single, static dummy reservation to the start of the | |
1801 | * reservation window list --- it gives us a placeholder for | |
1802 | * append-at-start-of-list which makes the allocation logic | |
1803 | * _much_ simpler. */ | |
1804 | sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1805 | sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1806 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; | |
1807 | sbi->s_rsv_window_head.rsv_goal_size = 0; | |
1808 | ext3_rsv_window_add(sb, &sbi->s_rsv_window_head); | |
1809 | ||
1810 | /* | |
1811 | * set up enough so that it can read an inode | |
1812 | */ | |
1813 | sb->s_op = &ext3_sops; | |
1814 | sb->s_export_op = &ext3_export_ops; | |
1815 | sb->s_xattr = ext3_xattr_handlers; | |
1816 | #ifdef CONFIG_QUOTA | |
1817 | sb->s_qcop = &ext3_qctl_operations; | |
1818 | sb->dq_op = &ext3_quota_operations; | |
1819 | #endif | |
1820 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
1821 | ||
1822 | sb->s_root = NULL; | |
1823 | ||
1824 | needs_recovery = (es->s_last_orphan != 0 || | |
1825 | EXT3_HAS_INCOMPAT_FEATURE(sb, | |
1826 | EXT3_FEATURE_INCOMPAT_RECOVER)); | |
1827 | ||
1828 | /* | |
1829 | * The first inode we look at is the journal inode. Don't try | |
1830 | * root first: it may be modified in the journal! | |
1831 | */ | |
1832 | if (!test_opt(sb, NOLOAD) && | |
1833 | EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { | |
71b96257 | 1834 | if (ext3_load_journal(sb, es, journal_devnum)) |
0216bfcf | 1835 | goto failed_mount3; |
1da177e4 LT |
1836 | } else if (journal_inum) { |
1837 | if (ext3_create_journal(sb, es, journal_inum)) | |
0216bfcf | 1838 | goto failed_mount3; |
1da177e4 LT |
1839 | } else { |
1840 | if (!silent) | |
1841 | printk (KERN_ERR | |
1842 | "ext3: No journal on filesystem on %s\n", | |
1843 | sb->s_id); | |
0216bfcf | 1844 | goto failed_mount3; |
1da177e4 LT |
1845 | } |
1846 | ||
1847 | /* We have now updated the journal if required, so we can | |
1848 | * validate the data journaling mode. */ | |
1849 | switch (test_opt(sb, DATA_FLAGS)) { | |
1850 | case 0: | |
1851 | /* No mode set, assume a default based on the journal | |
1852 | capabilities: ORDERED_DATA if the journal can | |
1853 | cope, else JOURNAL_DATA */ | |
1854 | if (journal_check_available_features | |
1855 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) | |
1856 | set_opt(sbi->s_mount_opt, ORDERED_DATA); | |
1857 | else | |
1858 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
1859 | break; | |
1860 | ||
1861 | case EXT3_MOUNT_ORDERED_DATA: | |
1862 | case EXT3_MOUNT_WRITEBACK_DATA: | |
1863 | if (!journal_check_available_features | |
1864 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) { | |
1865 | printk(KERN_ERR "EXT3-fs: Journal does not support " | |
1866 | "requested data journaling mode\n"); | |
0216bfcf | 1867 | goto failed_mount4; |
1da177e4 LT |
1868 | } |
1869 | default: | |
1870 | break; | |
1871 | } | |
1872 | ||
1873 | if (test_opt(sb, NOBH)) { | |
1da177e4 LT |
1874 | if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) { |
1875 | printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - " | |
1876 | "its supported only with writeback mode\n"); | |
1877 | clear_opt(sbi->s_mount_opt, NOBH); | |
1878 | } | |
1879 | } | |
1880 | /* | |
1881 | * The journal_load will have done any necessary log recovery, | |
1882 | * so we can safely mount the rest of the filesystem now. | |
1883 | */ | |
1884 | ||
1885 | root = iget(sb, EXT3_ROOT_INO); | |
1886 | sb->s_root = d_alloc_root(root); | |
1887 | if (!sb->s_root) { | |
1888 | printk(KERN_ERR "EXT3-fs: get root inode failed\n"); | |
1889 | iput(root); | |
0216bfcf | 1890 | goto failed_mount4; |
1da177e4 LT |
1891 | } |
1892 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1893 | dput(sb->s_root); | |
1894 | sb->s_root = NULL; | |
1895 | printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n"); | |
0216bfcf | 1896 | goto failed_mount4; |
1da177e4 LT |
1897 | } |
1898 | ||
1899 | ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY); | |
1900 | /* | |
1901 | * akpm: core read_super() calls in here with the superblock locked. | |
1902 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
1903 | * in numerous places. Here we just pop the lock - it's relatively | |
1904 | * harmless, because we are now ready to accept write_super() requests, | |
1905 | * and aviro says that's the only reason for hanging onto the | |
1906 | * superblock lock. | |
1907 | */ | |
1908 | EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS; | |
1909 | ext3_orphan_cleanup(sb, es); | |
1910 | EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS; | |
1911 | if (needs_recovery) | |
1912 | printk (KERN_INFO "EXT3-fs: recovery complete.\n"); | |
1913 | ext3_mark_recovery_complete(sb, es); | |
1914 | printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n", | |
1915 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal": | |
1916 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered": | |
1917 | "writeback"); | |
1918 | ||
1da177e4 LT |
1919 | lock_kernel(); |
1920 | return 0; | |
1921 | ||
1922 | cantfind_ext3: | |
1923 | if (!silent) | |
1924 | printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n", | |
1925 | sb->s_id); | |
1926 | goto failed_mount; | |
1927 | ||
0216bfcf | 1928 | failed_mount4: |
1da177e4 | 1929 | journal_destroy(sbi->s_journal); |
0216bfcf MC |
1930 | failed_mount3: |
1931 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
1932 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
1933 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
1da177e4 LT |
1934 | failed_mount2: |
1935 | for (i = 0; i < db_count; i++) | |
1936 | brelse(sbi->s_group_desc[i]); | |
1937 | kfree(sbi->s_group_desc); | |
1938 | failed_mount: | |
1939 | #ifdef CONFIG_QUOTA | |
1940 | for (i = 0; i < MAXQUOTAS; i++) | |
1941 | kfree(sbi->s_qf_names[i]); | |
1942 | #endif | |
1943 | ext3_blkdev_remove(sbi); | |
1944 | brelse(bh); | |
1945 | out_fail: | |
1946 | sb->s_fs_info = NULL; | |
1947 | kfree(sbi); | |
1948 | lock_kernel(); | |
1949 | return -EINVAL; | |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * Setup any per-fs journal parameters now. We'll do this both on | |
1954 | * initial mount, once the journal has been initialised but before we've | |
ae6ddcc5 | 1955 | * done any recovery; and again on any subsequent remount. |
1da177e4 LT |
1956 | */ |
1957 | static void ext3_init_journal_params(struct super_block *sb, journal_t *journal) | |
1958 | { | |
1959 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1960 | ||
1961 | if (sbi->s_commit_interval) | |
1962 | journal->j_commit_interval = sbi->s_commit_interval; | |
1963 | /* We could also set up an ext3-specific default for the commit | |
1964 | * interval here, but for now we'll just fall back to the jbd | |
1965 | * default. */ | |
1966 | ||
1967 | spin_lock(&journal->j_state_lock); | |
1968 | if (test_opt(sb, BARRIER)) | |
1969 | journal->j_flags |= JFS_BARRIER; | |
1970 | else | |
1971 | journal->j_flags &= ~JFS_BARRIER; | |
1972 | spin_unlock(&journal->j_state_lock); | |
1973 | } | |
1974 | ||
eee194e7 ES |
1975 | static journal_t *ext3_get_journal(struct super_block *sb, |
1976 | unsigned int journal_inum) | |
1da177e4 LT |
1977 | { |
1978 | struct inode *journal_inode; | |
1979 | journal_t *journal; | |
1980 | ||
1981 | /* First, test for the existence of a valid inode on disk. Bad | |
1982 | * things happen if we iget() an unused inode, as the subsequent | |
1983 | * iput() will try to delete it. */ | |
1984 | ||
1985 | journal_inode = iget(sb, journal_inum); | |
1986 | if (!journal_inode) { | |
1987 | printk(KERN_ERR "EXT3-fs: no journal found.\n"); | |
1988 | return NULL; | |
1989 | } | |
1990 | if (!journal_inode->i_nlink) { | |
1991 | make_bad_inode(journal_inode); | |
1992 | iput(journal_inode); | |
1993 | printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n"); | |
1994 | return NULL; | |
1995 | } | |
1996 | ||
1997 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", | |
1998 | journal_inode, journal_inode->i_size); | |
1999 | if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) { | |
2000 | printk(KERN_ERR "EXT3-fs: invalid journal inode.\n"); | |
2001 | iput(journal_inode); | |
2002 | return NULL; | |
2003 | } | |
2004 | ||
2005 | journal = journal_init_inode(journal_inode); | |
2006 | if (!journal) { | |
2007 | printk(KERN_ERR "EXT3-fs: Could not load journal inode\n"); | |
2008 | iput(journal_inode); | |
2009 | return NULL; | |
2010 | } | |
2011 | journal->j_private = sb; | |
2012 | ext3_init_journal_params(sb, journal); | |
2013 | return journal; | |
2014 | } | |
2015 | ||
2016 | static journal_t *ext3_get_dev_journal(struct super_block *sb, | |
2017 | dev_t j_dev) | |
2018 | { | |
2019 | struct buffer_head * bh; | |
2020 | journal_t *journal; | |
43d23f90 | 2021 | ext3_fsblk_t start; |
1c2bf374 | 2022 | ext3_fsblk_t len; |
1da177e4 | 2023 | int hblock, blocksize; |
43d23f90 | 2024 | ext3_fsblk_t sb_block; |
1da177e4 LT |
2025 | unsigned long offset; |
2026 | struct ext3_super_block * es; | |
2027 | struct block_device *bdev; | |
2028 | ||
2029 | bdev = ext3_blkdev_get(j_dev); | |
2030 | if (bdev == NULL) | |
2031 | return NULL; | |
2032 | ||
2033 | if (bd_claim(bdev, sb)) { | |
2034 | printk(KERN_ERR | |
2035 | "EXT3: failed to claim external journal device.\n"); | |
2036 | blkdev_put(bdev); | |
2037 | return NULL; | |
2038 | } | |
2039 | ||
2040 | blocksize = sb->s_blocksize; | |
2041 | hblock = bdev_hardsect_size(bdev); | |
2042 | if (blocksize < hblock) { | |
2043 | printk(KERN_ERR | |
2044 | "EXT3-fs: blocksize too small for journal device.\n"); | |
2045 | goto out_bdev; | |
2046 | } | |
2047 | ||
2048 | sb_block = EXT3_MIN_BLOCK_SIZE / blocksize; | |
2049 | offset = EXT3_MIN_BLOCK_SIZE % blocksize; | |
2050 | set_blocksize(bdev, blocksize); | |
2051 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
2052 | printk(KERN_ERR "EXT3-fs: couldn't read superblock of " | |
2053 | "external journal\n"); | |
2054 | goto out_bdev; | |
2055 | } | |
2056 | ||
2057 | es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); | |
2058 | if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) || | |
2059 | !(le32_to_cpu(es->s_feature_incompat) & | |
2060 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
2061 | printk(KERN_ERR "EXT3-fs: external journal has " | |
2062 | "bad superblock\n"); | |
2063 | brelse(bh); | |
2064 | goto out_bdev; | |
2065 | } | |
2066 | ||
2067 | if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { | |
2068 | printk(KERN_ERR "EXT3-fs: journal UUID does not match\n"); | |
2069 | brelse(bh); | |
2070 | goto out_bdev; | |
2071 | } | |
2072 | ||
2073 | len = le32_to_cpu(es->s_blocks_count); | |
2074 | start = sb_block + 1; | |
2075 | brelse(bh); /* we're done with the superblock */ | |
2076 | ||
2077 | journal = journal_init_dev(bdev, sb->s_bdev, | |
2078 | start, len, blocksize); | |
2079 | if (!journal) { | |
2080 | printk(KERN_ERR "EXT3-fs: failed to create device journal\n"); | |
2081 | goto out_bdev; | |
2082 | } | |
2083 | journal->j_private = sb; | |
2084 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2085 | wait_on_buffer(journal->j_sb_buffer); | |
2086 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
2087 | printk(KERN_ERR "EXT3-fs: I/O error on journal device\n"); | |
2088 | goto out_journal; | |
2089 | } | |
2090 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
2091 | printk(KERN_ERR "EXT3-fs: External journal has more than one " | |
2092 | "user (unsupported) - %d\n", | |
2093 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
2094 | goto out_journal; | |
2095 | } | |
2096 | EXT3_SB(sb)->journal_bdev = bdev; | |
2097 | ext3_init_journal_params(sb, journal); | |
2098 | return journal; | |
2099 | out_journal: | |
2100 | journal_destroy(journal); | |
2101 | out_bdev: | |
2102 | ext3_blkdev_put(bdev); | |
2103 | return NULL; | |
2104 | } | |
2105 | ||
71b96257 JL |
2106 | static int ext3_load_journal(struct super_block *sb, |
2107 | struct ext3_super_block *es, | |
2108 | unsigned long journal_devnum) | |
1da177e4 LT |
2109 | { |
2110 | journal_t *journal; | |
eee194e7 | 2111 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
71b96257 | 2112 | dev_t journal_dev; |
1da177e4 LT |
2113 | int err = 0; |
2114 | int really_read_only; | |
2115 | ||
71b96257 JL |
2116 | if (journal_devnum && |
2117 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2118 | printk(KERN_INFO "EXT3-fs: external journal device major/minor " | |
2119 | "numbers have changed\n"); | |
2120 | journal_dev = new_decode_dev(journal_devnum); | |
2121 | } else | |
2122 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2123 | ||
1da177e4 LT |
2124 | really_read_only = bdev_read_only(sb->s_bdev); |
2125 | ||
2126 | /* | |
2127 | * Are we loading a blank journal or performing recovery after a | |
2128 | * crash? For recovery, we need to check in advance whether we | |
2129 | * can get read-write access to the device. | |
2130 | */ | |
2131 | ||
2132 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) { | |
2133 | if (sb->s_flags & MS_RDONLY) { | |
2134 | printk(KERN_INFO "EXT3-fs: INFO: recovery " | |
2135 | "required on readonly filesystem.\n"); | |
2136 | if (really_read_only) { | |
2137 | printk(KERN_ERR "EXT3-fs: write access " | |
2138 | "unavailable, cannot proceed.\n"); | |
2139 | return -EROFS; | |
2140 | } | |
2141 | printk (KERN_INFO "EXT3-fs: write access will " | |
2142 | "be enabled during recovery.\n"); | |
2143 | } | |
2144 | } | |
2145 | ||
2146 | if (journal_inum && journal_dev) { | |
2147 | printk(KERN_ERR "EXT3-fs: filesystem has both journal " | |
2148 | "and inode journals!\n"); | |
2149 | return -EINVAL; | |
2150 | } | |
2151 | ||
2152 | if (journal_inum) { | |
2153 | if (!(journal = ext3_get_journal(sb, journal_inum))) | |
2154 | return -EINVAL; | |
2155 | } else { | |
2156 | if (!(journal = ext3_get_dev_journal(sb, journal_dev))) | |
2157 | return -EINVAL; | |
2158 | } | |
2159 | ||
2160 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { | |
2161 | err = journal_update_format(journal); | |
2162 | if (err) { | |
2163 | printk(KERN_ERR "EXT3-fs: error updating journal.\n"); | |
2164 | journal_destroy(journal); | |
2165 | return err; | |
2166 | } | |
2167 | } | |
2168 | ||
2169 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) | |
2170 | err = journal_wipe(journal, !really_read_only); | |
2171 | if (!err) | |
2172 | err = journal_load(journal); | |
2173 | ||
2174 | if (err) { | |
2175 | printk(KERN_ERR "EXT3-fs: error loading journal.\n"); | |
2176 | journal_destroy(journal); | |
2177 | return err; | |
2178 | } | |
2179 | ||
2180 | EXT3_SB(sb)->s_journal = journal; | |
2181 | ext3_clear_journal_err(sb, es); | |
71b96257 JL |
2182 | |
2183 | if (journal_devnum && | |
2184 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2185 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
2186 | sb->s_dirt = 1; | |
2187 | ||
2188 | /* Make sure we flush the recovery flag to disk. */ | |
2189 | ext3_commit_super(sb, es, 1); | |
2190 | } | |
2191 | ||
1da177e4 LT |
2192 | return 0; |
2193 | } | |
2194 | ||
2195 | static int ext3_create_journal(struct super_block * sb, | |
2196 | struct ext3_super_block * es, | |
eee194e7 | 2197 | unsigned int journal_inum) |
1da177e4 LT |
2198 | { |
2199 | journal_t *journal; | |
952d9de1 | 2200 | int err; |
1da177e4 LT |
2201 | |
2202 | if (sb->s_flags & MS_RDONLY) { | |
2203 | printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to " | |
2204 | "create journal.\n"); | |
2205 | return -EROFS; | |
2206 | } | |
2207 | ||
952d9de1 BP |
2208 | journal = ext3_get_journal(sb, journal_inum); |
2209 | if (!journal) | |
1da177e4 LT |
2210 | return -EINVAL; |
2211 | ||
eee194e7 | 2212 | printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n", |
1da177e4 LT |
2213 | journal_inum); |
2214 | ||
952d9de1 BP |
2215 | err = journal_create(journal); |
2216 | if (err) { | |
1da177e4 LT |
2217 | printk(KERN_ERR "EXT3-fs: error creating journal.\n"); |
2218 | journal_destroy(journal); | |
2219 | return -EIO; | |
2220 | } | |
2221 | ||
2222 | EXT3_SB(sb)->s_journal = journal; | |
2223 | ||
2224 | ext3_update_dynamic_rev(sb); | |
2225 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2226 | EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL); | |
2227 | ||
2228 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
2229 | sb->s_dirt = 1; | |
2230 | ||
2231 | /* Make sure we flush the recovery flag to disk. */ | |
2232 | ext3_commit_super(sb, es, 1); | |
2233 | ||
2234 | return 0; | |
2235 | } | |
2236 | ||
2237 | static void ext3_commit_super (struct super_block * sb, | |
2238 | struct ext3_super_block * es, | |
2239 | int sync) | |
2240 | { | |
2241 | struct buffer_head *sbh = EXT3_SB(sb)->s_sbh; | |
2242 | ||
2243 | if (!sbh) | |
2244 | return; | |
2245 | es->s_wtime = cpu_to_le32(get_seconds()); | |
2246 | es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb)); | |
2247 | es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb)); | |
2248 | BUFFER_TRACE(sbh, "marking dirty"); | |
2249 | mark_buffer_dirty(sbh); | |
2250 | if (sync) | |
2251 | sync_dirty_buffer(sbh); | |
2252 | } | |
2253 | ||
2254 | ||
2255 | /* | |
2256 | * Have we just finished recovery? If so, and if we are mounting (or | |
2257 | * remounting) the filesystem readonly, then we will end up with a | |
2258 | * consistent fs on disk. Record that fact. | |
2259 | */ | |
2260 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
2261 | struct ext3_super_block * es) | |
2262 | { | |
2263 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
2264 | ||
2265 | journal_lock_updates(journal); | |
2266 | journal_flush(journal); | |
030703e4 | 2267 | lock_super(sb); |
1da177e4 LT |
2268 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) && |
2269 | sb->s_flags & MS_RDONLY) { | |
2270 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2271 | sb->s_dirt = 0; | |
2272 | ext3_commit_super(sb, es, 1); | |
2273 | } | |
030703e4 | 2274 | unlock_super(sb); |
1da177e4 LT |
2275 | journal_unlock_updates(journal); |
2276 | } | |
2277 | ||
2278 | /* | |
2279 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2280 | * has recorded an error from a previous lifetime, move that error to the | |
2281 | * main filesystem now. | |
2282 | */ | |
2283 | static void ext3_clear_journal_err(struct super_block * sb, | |
2284 | struct ext3_super_block * es) | |
2285 | { | |
2286 | journal_t *journal; | |
2287 | int j_errno; | |
2288 | const char *errstr; | |
2289 | ||
2290 | journal = EXT3_SB(sb)->s_journal; | |
2291 | ||
2292 | /* | |
2293 | * Now check for any error status which may have been recorded in the | |
2294 | * journal by a prior ext3_error() or ext3_abort() | |
2295 | */ | |
2296 | ||
2297 | j_errno = journal_errno(journal); | |
2298 | if (j_errno) { | |
2299 | char nbuf[16]; | |
2300 | ||
2301 | errstr = ext3_decode_error(sb, j_errno, nbuf); | |
2302 | ext3_warning(sb, __FUNCTION__, "Filesystem error recorded " | |
2303 | "from previous mount: %s", errstr); | |
2304 | ext3_warning(sb, __FUNCTION__, "Marking fs in need of " | |
2305 | "filesystem check."); | |
2306 | ||
2307 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
2308 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
2309 | ext3_commit_super (sb, es, 1); | |
2310 | ||
2311 | journal_clear_err(journal); | |
2312 | } | |
2313 | } | |
2314 | ||
2315 | /* | |
2316 | * Force the running and committing transactions to commit, | |
2317 | * and wait on the commit. | |
2318 | */ | |
2319 | int ext3_force_commit(struct super_block *sb) | |
2320 | { | |
2321 | journal_t *journal; | |
2322 | int ret; | |
2323 | ||
2324 | if (sb->s_flags & MS_RDONLY) | |
2325 | return 0; | |
2326 | ||
2327 | journal = EXT3_SB(sb)->s_journal; | |
2328 | sb->s_dirt = 0; | |
2329 | ret = ext3_journal_force_commit(journal); | |
2330 | return ret; | |
2331 | } | |
2332 | ||
2333 | /* | |
2334 | * Ext3 always journals updates to the superblock itself, so we don't | |
2335 | * have to propagate any other updates to the superblock on disk at this | |
2336 | * point. Just start an async writeback to get the buffers on their way | |
2337 | * to the disk. | |
2338 | * | |
2339 | * This implicitly triggers the writebehind on sync(). | |
2340 | */ | |
2341 | ||
2342 | static void ext3_write_super (struct super_block * sb) | |
2343 | { | |
7892f2f4 | 2344 | if (mutex_trylock(&sb->s_lock) != 0) |
1da177e4 LT |
2345 | BUG(); |
2346 | sb->s_dirt = 0; | |
2347 | } | |
2348 | ||
2349 | static int ext3_sync_fs(struct super_block *sb, int wait) | |
2350 | { | |
2351 | tid_t target; | |
2352 | ||
2353 | sb->s_dirt = 0; | |
2354 | if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { | |
2355 | if (wait) | |
2356 | log_wait_commit(EXT3_SB(sb)->s_journal, target); | |
2357 | } | |
2358 | return 0; | |
2359 | } | |
2360 | ||
2361 | /* | |
2362 | * LVM calls this function before a (read-only) snapshot is created. This | |
2363 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2364 | */ | |
2365 | static void ext3_write_super_lockfs(struct super_block *sb) | |
2366 | { | |
2367 | sb->s_dirt = 0; | |
2368 | ||
2369 | if (!(sb->s_flags & MS_RDONLY)) { | |
2370 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
2371 | ||
2372 | /* Now we set up the journal barrier. */ | |
2373 | journal_lock_updates(journal); | |
2374 | journal_flush(journal); | |
2375 | ||
2376 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
2377 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2378 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); | |
2379 | } | |
2380 | } | |
2381 | ||
2382 | /* | |
2383 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2384 | * flag here, even though the filesystem is not technically dirty yet. | |
2385 | */ | |
2386 | static void ext3_unlockfs(struct super_block *sb) | |
2387 | { | |
2388 | if (!(sb->s_flags & MS_RDONLY)) { | |
2389 | lock_super(sb); | |
2390 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
2391 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2392 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); | |
2393 | unlock_super(sb); | |
2394 | journal_unlock_updates(EXT3_SB(sb)->s_journal); | |
2395 | } | |
2396 | } | |
2397 | ||
2398 | static int ext3_remount (struct super_block * sb, int * flags, char * data) | |
2399 | { | |
2400 | struct ext3_super_block * es; | |
2401 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 2402 | ext3_fsblk_t n_blocks_count = 0; |
08c6a96f JK |
2403 | unsigned long old_sb_flags; |
2404 | struct ext3_mount_options old_opts; | |
2405 | int err; | |
2406 | #ifdef CONFIG_QUOTA | |
2407 | int i; | |
2408 | #endif | |
2409 | ||
2410 | /* Store the original options */ | |
2411 | old_sb_flags = sb->s_flags; | |
2412 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2413 | old_opts.s_resuid = sbi->s_resuid; | |
2414 | old_opts.s_resgid = sbi->s_resgid; | |
2415 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2416 | #ifdef CONFIG_QUOTA | |
2417 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
2418 | for (i = 0; i < MAXQUOTAS; i++) | |
2419 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
2420 | #endif | |
1da177e4 LT |
2421 | |
2422 | /* | |
2423 | * Allow the "check" option to be passed as a remount option. | |
2424 | */ | |
71b96257 | 2425 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { |
08c6a96f JK |
2426 | err = -EINVAL; |
2427 | goto restore_opts; | |
2428 | } | |
1da177e4 LT |
2429 | |
2430 | if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) | |
2431 | ext3_abort(sb, __FUNCTION__, "Abort forced by user"); | |
2432 | ||
2433 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
2434 | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); | |
2435 | ||
2436 | es = sbi->s_es; | |
2437 | ||
2438 | ext3_init_journal_params(sb, sbi->s_journal); | |
2439 | ||
2440 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
2441 | n_blocks_count > le32_to_cpu(es->s_blocks_count)) { | |
08c6a96f JK |
2442 | if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) { |
2443 | err = -EROFS; | |
2444 | goto restore_opts; | |
2445 | } | |
1da177e4 LT |
2446 | |
2447 | if (*flags & MS_RDONLY) { | |
2448 | /* | |
2449 | * First of all, the unconditional stuff we have to do | |
2450 | * to disable replay of the journal when we next remount | |
2451 | */ | |
2452 | sb->s_flags |= MS_RDONLY; | |
2453 | ||
2454 | /* | |
2455 | * OK, test if we are remounting a valid rw partition | |
2456 | * readonly, and if so set the rdonly flag and then | |
2457 | * mark the partition as valid again. | |
2458 | */ | |
2459 | if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) && | |
2460 | (sbi->s_mount_state & EXT3_VALID_FS)) | |
2461 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
2462 | ||
030703e4 JK |
2463 | /* |
2464 | * We have to unlock super so that we can wait for | |
2465 | * transactions. | |
2466 | */ | |
2467 | unlock_super(sb); | |
1da177e4 | 2468 | ext3_mark_recovery_complete(sb, es); |
030703e4 | 2469 | lock_super(sb); |
1da177e4 LT |
2470 | } else { |
2471 | __le32 ret; | |
2472 | if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb, | |
2473 | ~EXT3_FEATURE_RO_COMPAT_SUPP))) { | |
2474 | printk(KERN_WARNING "EXT3-fs: %s: couldn't " | |
2475 | "remount RDWR because of unsupported " | |
2476 | "optional features (%x).\n", | |
2477 | sb->s_id, le32_to_cpu(ret)); | |
08c6a96f JK |
2478 | err = -EROFS; |
2479 | goto restore_opts; | |
1da177e4 | 2480 | } |
ea9a05a1 ES |
2481 | |
2482 | /* | |
2483 | * If we have an unprocessed orphan list hanging | |
2484 | * around from a previously readonly bdev mount, | |
2485 | * require a full umount/remount for now. | |
2486 | */ | |
2487 | if (es->s_last_orphan) { | |
2488 | printk(KERN_WARNING "EXT3-fs: %s: couldn't " | |
2489 | "remount RDWR because of unprocessed " | |
2490 | "orphan inode list. Please " | |
2491 | "umount/remount instead.\n", | |
2492 | sb->s_id); | |
2493 | err = -EINVAL; | |
2494 | goto restore_opts; | |
2495 | } | |
2496 | ||
1da177e4 LT |
2497 | /* |
2498 | * Mounting a RDONLY partition read-write, so reread | |
2499 | * and store the current valid flag. (It may have | |
2500 | * been changed by e2fsck since we originally mounted | |
2501 | * the partition.) | |
2502 | */ | |
2503 | ext3_clear_journal_err(sb, es); | |
2504 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
a4e4de36 | 2505 | if ((err = ext3_group_extend(sb, es, n_blocks_count))) |
08c6a96f | 2506 | goto restore_opts; |
1da177e4 LT |
2507 | if (!ext3_setup_super (sb, es, 0)) |
2508 | sb->s_flags &= ~MS_RDONLY; | |
2509 | } | |
2510 | } | |
08c6a96f JK |
2511 | #ifdef CONFIG_QUOTA |
2512 | /* Release old quota file names */ | |
2513 | for (i = 0; i < MAXQUOTAS; i++) | |
2514 | if (old_opts.s_qf_names[i] && | |
2515 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2516 | kfree(old_opts.s_qf_names[i]); | |
2517 | #endif | |
1da177e4 | 2518 | return 0; |
08c6a96f JK |
2519 | restore_opts: |
2520 | sb->s_flags = old_sb_flags; | |
2521 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
2522 | sbi->s_resuid = old_opts.s_resuid; | |
2523 | sbi->s_resgid = old_opts.s_resgid; | |
2524 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
2525 | #ifdef CONFIG_QUOTA | |
2526 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
2527 | for (i = 0; i < MAXQUOTAS; i++) { | |
2528 | if (sbi->s_qf_names[i] && | |
2529 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2530 | kfree(sbi->s_qf_names[i]); | |
2531 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
2532 | } | |
2533 | #endif | |
2534 | return err; | |
1da177e4 LT |
2535 | } |
2536 | ||
726c3342 | 2537 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf) |
1da177e4 | 2538 | { |
726c3342 | 2539 | struct super_block *sb = dentry->d_sb; |
09fe316a AT |
2540 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
2541 | struct ext3_super_block *es = sbi->s_es; | |
50ee0a32 | 2542 | u64 fsid; |
1da177e4 | 2543 | |
a71ce8c6 BP |
2544 | if (test_opt(sb, MINIX_DF)) { |
2545 | sbi->s_overhead_last = 0; | |
2546 | } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { | |
2547 | unsigned long ngroups = sbi->s_groups_count, i; | |
2548 | ext3_fsblk_t overhead = 0; | |
1da177e4 LT |
2549 | smp_rmb(); |
2550 | ||
2551 | /* | |
a71ce8c6 BP |
2552 | * Compute the overhead (FS structures). This is constant |
2553 | * for a given filesystem unless the number of block groups | |
2554 | * changes so we cache the previous value until it does. | |
1da177e4 LT |
2555 | */ |
2556 | ||
2557 | /* | |
2558 | * All of the blocks before first_data_block are | |
2559 | * overhead | |
2560 | */ | |
2561 | overhead = le32_to_cpu(es->s_first_data_block); | |
2562 | ||
2563 | /* | |
2564 | * Add the overhead attributed to the superblock and | |
2565 | * block group descriptors. If the sparse superblocks | |
2566 | * feature is turned on, then not all groups have this. | |
2567 | */ | |
2568 | for (i = 0; i < ngroups; i++) { | |
2569 | overhead += ext3_bg_has_super(sb, i) + | |
2570 | ext3_bg_num_gdb(sb, i); | |
2571 | cond_resched(); | |
2572 | } | |
2573 | ||
2574 | /* | |
2575 | * Every block group has an inode bitmap, a block | |
2576 | * bitmap, and an inode table. | |
2577 | */ | |
a71ce8c6 BP |
2578 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
2579 | sbi->s_overhead_last = overhead; | |
2580 | smp_wmb(); | |
2581 | sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); | |
1da177e4 LT |
2582 | } |
2583 | ||
2584 | buf->f_type = EXT3_SUPER_MAGIC; | |
2585 | buf->f_bsize = sb->s_blocksize; | |
a71ce8c6 | 2586 | buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last; |
52d9f3b4 | 2587 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); |
a71ce8c6 | 2588 | es->s_free_blocks_count = cpu_to_le32(buf->f_bfree); |
1da177e4 LT |
2589 | buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); |
2590 | if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) | |
2591 | buf->f_bavail = 0; | |
2592 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 2593 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
a71ce8c6 | 2594 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
1da177e4 | 2595 | buf->f_namelen = EXT3_NAME_LEN; |
50ee0a32 PE |
2596 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
2597 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
2598 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
2599 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
1da177e4 LT |
2600 | return 0; |
2601 | } | |
2602 | ||
2603 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
2604 | * is locked for write. Otherwise the are possible deadlocks: | |
2605 | * Process 1 Process 2 | |
2606 | * ext3_create() quota_sync() | |
2607 | * journal_start() write_dquot() | |
d3be915f IM |
2608 | * DQUOT_INIT() down(dqio_mutex) |
2609 | * down(dqio_mutex) journal_start() | |
1da177e4 LT |
2610 | * |
2611 | */ | |
2612 | ||
2613 | #ifdef CONFIG_QUOTA | |
2614 | ||
2615 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
2616 | { | |
2617 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
2618 | } | |
2619 | ||
2620 | static int ext3_dquot_initialize(struct inode *inode, int type) | |
2621 | { | |
2622 | handle_t *handle; | |
2623 | int ret, err; | |
2624 | ||
2625 | /* We may create quota structure so we need to reserve enough blocks */ | |
1f54587b | 2626 | handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS(inode->i_sb)); |
1da177e4 LT |
2627 | if (IS_ERR(handle)) |
2628 | return PTR_ERR(handle); | |
2629 | ret = dquot_initialize(inode, type); | |
2630 | err = ext3_journal_stop(handle); | |
2631 | if (!ret) | |
2632 | ret = err; | |
2633 | return ret; | |
2634 | } | |
2635 | ||
2636 | static int ext3_dquot_drop(struct inode *inode) | |
2637 | { | |
2638 | handle_t *handle; | |
2639 | int ret, err; | |
2640 | ||
2641 | /* We may delete quota structure so we need to reserve enough blocks */ | |
1f54587b | 2642 | handle = ext3_journal_start(inode, 2*EXT3_QUOTA_DEL_BLOCKS(inode->i_sb)); |
1da177e4 LT |
2643 | if (IS_ERR(handle)) |
2644 | return PTR_ERR(handle); | |
2645 | ret = dquot_drop(inode); | |
2646 | err = ext3_journal_stop(handle); | |
2647 | if (!ret) | |
2648 | ret = err; | |
2649 | return ret; | |
2650 | } | |
2651 | ||
2652 | static int ext3_write_dquot(struct dquot *dquot) | |
2653 | { | |
2654 | int ret, err; | |
2655 | handle_t *handle; | |
2656 | struct inode *inode; | |
2657 | ||
2658 | inode = dquot_to_inode(dquot); | |
2659 | handle = ext3_journal_start(inode, | |
1f54587b | 2660 | EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2661 | if (IS_ERR(handle)) |
2662 | return PTR_ERR(handle); | |
2663 | ret = dquot_commit(dquot); | |
2664 | err = ext3_journal_stop(handle); | |
2665 | if (!ret) | |
2666 | ret = err; | |
2667 | return ret; | |
2668 | } | |
2669 | ||
2670 | static int ext3_acquire_dquot(struct dquot *dquot) | |
2671 | { | |
2672 | int ret, err; | |
2673 | handle_t *handle; | |
2674 | ||
2675 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2676 | EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2677 | if (IS_ERR(handle)) |
2678 | return PTR_ERR(handle); | |
2679 | ret = dquot_acquire(dquot); | |
2680 | err = ext3_journal_stop(handle); | |
2681 | if (!ret) | |
2682 | ret = err; | |
2683 | return ret; | |
2684 | } | |
2685 | ||
2686 | static int ext3_release_dquot(struct dquot *dquot) | |
2687 | { | |
2688 | int ret, err; | |
2689 | handle_t *handle; | |
2690 | ||
2691 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2692 | EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
2693 | if (IS_ERR(handle)) { |
2694 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2695 | dquot_release(dquot); | |
1da177e4 | 2696 | return PTR_ERR(handle); |
9c3013e9 | 2697 | } |
1da177e4 LT |
2698 | ret = dquot_release(dquot); |
2699 | err = ext3_journal_stop(handle); | |
2700 | if (!ret) | |
2701 | ret = err; | |
2702 | return ret; | |
2703 | } | |
2704 | ||
2705 | static int ext3_mark_dquot_dirty(struct dquot *dquot) | |
2706 | { | |
2707 | /* Are we journalling quotas? */ | |
2708 | if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || | |
2709 | EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2710 | dquot_mark_dquot_dirty(dquot); | |
2711 | return ext3_write_dquot(dquot); | |
2712 | } else { | |
2713 | return dquot_mark_dquot_dirty(dquot); | |
2714 | } | |
2715 | } | |
2716 | ||
2717 | static int ext3_write_info(struct super_block *sb, int type) | |
2718 | { | |
2719 | int ret, err; | |
2720 | handle_t *handle; | |
2721 | ||
2722 | /* Data block + inode block */ | |
2723 | handle = ext3_journal_start(sb->s_root->d_inode, 2); | |
2724 | if (IS_ERR(handle)) | |
2725 | return PTR_ERR(handle); | |
2726 | ret = dquot_commit_info(sb, type); | |
2727 | err = ext3_journal_stop(handle); | |
2728 | if (!ret) | |
2729 | ret = err; | |
2730 | return ret; | |
2731 | } | |
2732 | ||
2733 | /* | |
2734 | * Turn on quotas during mount time - we need to find | |
2735 | * the quota file and such... | |
2736 | */ | |
2737 | static int ext3_quota_on_mount(struct super_block *sb, int type) | |
2738 | { | |
84de856e CH |
2739 | return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type], |
2740 | EXT3_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2741 | } |
2742 | ||
2743 | /* | |
2744 | * Standard function to be called on quota_on | |
2745 | */ | |
2746 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, | |
2747 | char *path) | |
2748 | { | |
2749 | int err; | |
2750 | struct nameidata nd; | |
2751 | ||
1f54587b JK |
2752 | if (!test_opt(sb, QUOTA)) |
2753 | return -EINVAL; | |
1da177e4 LT |
2754 | /* Not journalling quota? */ |
2755 | if (!EXT3_SB(sb)->s_qf_names[USRQUOTA] && | |
2756 | !EXT3_SB(sb)->s_qf_names[GRPQUOTA]) | |
2757 | return vfs_quota_on(sb, type, format_id, path); | |
2758 | err = path_lookup(path, LOOKUP_FOLLOW, &nd); | |
2759 | if (err) | |
2760 | return err; | |
2761 | /* Quotafile not on the same filesystem? */ | |
2762 | if (nd.mnt->mnt_sb != sb) { | |
2763 | path_release(&nd); | |
2764 | return -EXDEV; | |
2765 | } | |
2766 | /* Quotafile not of fs root? */ | |
2767 | if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) | |
2768 | printk(KERN_WARNING | |
2769 | "EXT3-fs: Quota file not on filesystem root. " | |
2770 | "Journalled quota will not work.\n"); | |
2771 | path_release(&nd); | |
2772 | return vfs_quota_on(sb, type, format_id, path); | |
2773 | } | |
2774 | ||
2775 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2776 | * acquiring the locks... As quota files are never truncated and quota code | |
2777 | * itself serializes the operations (and noone else should touch the files) | |
2778 | * we don't have to be afraid of races */ | |
2779 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
2780 | size_t len, loff_t off) | |
2781 | { | |
2782 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2783 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2784 | int err = 0; | |
2785 | int offset = off & (sb->s_blocksize - 1); | |
2786 | int tocopy; | |
2787 | size_t toread; | |
2788 | struct buffer_head *bh; | |
2789 | loff_t i_size = i_size_read(inode); | |
2790 | ||
2791 | if (off > i_size) | |
2792 | return 0; | |
2793 | if (off+len > i_size) | |
2794 | len = i_size-off; | |
2795 | toread = len; | |
2796 | while (toread > 0) { | |
2797 | tocopy = sb->s_blocksize - offset < toread ? | |
2798 | sb->s_blocksize - offset : toread; | |
2799 | bh = ext3_bread(NULL, inode, blk, 0, &err); | |
2800 | if (err) | |
2801 | return err; | |
2802 | if (!bh) /* A hole? */ | |
2803 | memset(data, 0, tocopy); | |
2804 | else | |
2805 | memcpy(data, bh->b_data+offset, tocopy); | |
2806 | brelse(bh); | |
2807 | offset = 0; | |
2808 | toread -= tocopy; | |
2809 | data += tocopy; | |
2810 | blk++; | |
2811 | } | |
2812 | return len; | |
2813 | } | |
2814 | ||
2815 | /* Write to quotafile (we know the transaction is already started and has | |
2816 | * enough credits) */ | |
2817 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
2818 | const char *data, size_t len, loff_t off) | |
2819 | { | |
2820 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2821 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2822 | int err = 0; | |
2823 | int offset = off & (sb->s_blocksize - 1); | |
2824 | int tocopy; | |
2825 | int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL; | |
2826 | size_t towrite = len; | |
2827 | struct buffer_head *bh; | |
2828 | handle_t *handle = journal_current_handle(); | |
2829 | ||
9c3013e9 JK |
2830 | if (!handle) { |
2831 | printk(KERN_WARNING "EXT3-fs: Quota write (off=%Lu, len=%Lu)" | |
2832 | " cancelled because transaction is not started.\n", | |
2833 | (unsigned long long)off, (unsigned long long)len); | |
2834 | return -EIO; | |
2835 | } | |
5c81a419 | 2836 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
1da177e4 LT |
2837 | while (towrite > 0) { |
2838 | tocopy = sb->s_blocksize - offset < towrite ? | |
2839 | sb->s_blocksize - offset : towrite; | |
2840 | bh = ext3_bread(handle, inode, blk, 1, &err); | |
2841 | if (!bh) | |
2842 | goto out; | |
2843 | if (journal_quota) { | |
2844 | err = ext3_journal_get_write_access(handle, bh); | |
2845 | if (err) { | |
2846 | brelse(bh); | |
2847 | goto out; | |
2848 | } | |
2849 | } | |
2850 | lock_buffer(bh); | |
2851 | memcpy(bh->b_data+offset, data, tocopy); | |
2852 | flush_dcache_page(bh->b_page); | |
2853 | unlock_buffer(bh); | |
2854 | if (journal_quota) | |
2855 | err = ext3_journal_dirty_metadata(handle, bh); | |
2856 | else { | |
2857 | /* Always do at least ordered writes for quotas */ | |
2858 | err = ext3_journal_dirty_data(handle, bh); | |
2859 | mark_buffer_dirty(bh); | |
2860 | } | |
2861 | brelse(bh); | |
2862 | if (err) | |
2863 | goto out; | |
2864 | offset = 0; | |
2865 | towrite -= tocopy; | |
2866 | data += tocopy; | |
2867 | blk++; | |
2868 | } | |
2869 | out: | |
2870 | if (len == towrite) | |
2871 | return err; | |
2872 | if (inode->i_size < off+len-towrite) { | |
2873 | i_size_write(inode, off+len-towrite); | |
2874 | EXT3_I(inode)->i_disksize = inode->i_size; | |
2875 | } | |
2876 | inode->i_version++; | |
2877 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2878 | ext3_mark_inode_dirty(handle, inode); | |
1b1dcc1b | 2879 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
2880 | return len - towrite; |
2881 | } | |
2882 | ||
2883 | #endif | |
2884 | ||
454e2398 DH |
2885 | static int ext3_get_sb(struct file_system_type *fs_type, |
2886 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 2887 | { |
454e2398 | 2888 | return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt); |
1da177e4 LT |
2889 | } |
2890 | ||
2891 | static struct file_system_type ext3_fs_type = { | |
2892 | .owner = THIS_MODULE, | |
2893 | .name = "ext3", | |
2894 | .get_sb = ext3_get_sb, | |
2895 | .kill_sb = kill_block_super, | |
2896 | .fs_flags = FS_REQUIRES_DEV, | |
2897 | }; | |
2898 | ||
2899 | static int __init init_ext3_fs(void) | |
2900 | { | |
2901 | int err = init_ext3_xattr(); | |
2902 | if (err) | |
2903 | return err; | |
2904 | err = init_inodecache(); | |
2905 | if (err) | |
2906 | goto out1; | |
2907 | err = register_filesystem(&ext3_fs_type); | |
2908 | if (err) | |
2909 | goto out; | |
2910 | return 0; | |
2911 | out: | |
2912 | destroy_inodecache(); | |
2913 | out1: | |
e9ad5620 | 2914 | exit_ext3_xattr(); |
1da177e4 LT |
2915 | return err; |
2916 | } | |
2917 | ||
2918 | static void __exit exit_ext3_fs(void) | |
2919 | { | |
2920 | unregister_filesystem(&ext3_fs_type); | |
2921 | destroy_inodecache(); | |
2922 | exit_ext3_xattr(); | |
2923 | } | |
2924 | ||
2925 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
2926 | MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions"); | |
2927 | MODULE_LICENSE("GPL"); | |
2928 | module_init(init_ext3_fs) | |
2929 | module_exit(exit_ext3_fs) |