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 | |
bbae8bcc LT |
47 | #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED |
48 | #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA | |
49 | #else | |
50 | #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA | |
51 | #endif | |
52 | ||
71b96257 JL |
53 | static int ext3_load_journal(struct super_block *, struct ext3_super_block *, |
54 | unsigned long journal_devnum); | |
1da177e4 | 55 | static int ext3_create_journal(struct super_block *, struct ext3_super_block *, |
eee194e7 | 56 | unsigned int); |
c4be0c1d TS |
57 | static int ext3_commit_super(struct super_block *sb, |
58 | struct ext3_super_block *es, | |
1da177e4 LT |
59 | int sync); |
60 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
61 | struct ext3_super_block * es); | |
62 | static void ext3_clear_journal_err(struct super_block * sb, | |
63 | struct ext3_super_block * es); | |
64 | static int ext3_sync_fs(struct super_block *sb, int wait); | |
65 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
66 | char nbuf[16]); | |
67 | static int ext3_remount (struct super_block * sb, int * flags, char * data); | |
726c3342 | 68 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf); |
c4be0c1d | 69 | static int ext3_unfreeze(struct super_block *sb); |
c4be0c1d | 70 | static int ext3_freeze(struct super_block *sb); |
1da177e4 | 71 | |
ae6ddcc5 | 72 | /* |
1da177e4 LT |
73 | * Wrappers for journal_start/end. |
74 | * | |
75 | * The only special thing we need to do here is to make sure that all | |
76 | * journal_end calls result in the superblock being marked dirty, so | |
77 | * that sync() will call the filesystem's write_super callback if | |
ae6ddcc5 | 78 | * appropriate. |
1da177e4 LT |
79 | */ |
80 | handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks) | |
81 | { | |
82 | journal_t *journal; | |
83 | ||
84 | if (sb->s_flags & MS_RDONLY) | |
85 | return ERR_PTR(-EROFS); | |
86 | ||
87 | /* Special case here: if the journal has aborted behind our | |
88 | * backs (eg. EIO in the commit thread), then we still need to | |
89 | * take the FS itself readonly cleanly. */ | |
90 | journal = EXT3_SB(sb)->s_journal; | |
91 | if (is_journal_aborted(journal)) { | |
e05b6b52 | 92 | ext3_abort(sb, __func__, |
1da177e4 LT |
93 | "Detected aborted journal"); |
94 | return ERR_PTR(-EROFS); | |
95 | } | |
96 | ||
97 | return journal_start(journal, nblocks); | |
98 | } | |
99 | ||
ae6ddcc5 | 100 | /* |
1da177e4 LT |
101 | * The only special thing we need to do here is to make sure that all |
102 | * journal_stop calls result in the superblock being marked dirty, so | |
103 | * that sync() will call the filesystem's write_super callback if | |
ae6ddcc5 | 104 | * appropriate. |
1da177e4 LT |
105 | */ |
106 | int __ext3_journal_stop(const char *where, handle_t *handle) | |
107 | { | |
108 | struct super_block *sb; | |
109 | int err; | |
110 | int rc; | |
111 | ||
112 | sb = handle->h_transaction->t_journal->j_private; | |
113 | err = handle->h_err; | |
114 | rc = journal_stop(handle); | |
115 | ||
116 | if (!err) | |
117 | err = rc; | |
118 | if (err) | |
119 | __ext3_std_error(sb, where, err); | |
120 | return err; | |
121 | } | |
122 | ||
123 | void ext3_journal_abort_handle(const char *caller, const char *err_fn, | |
124 | struct buffer_head *bh, handle_t *handle, int err) | |
125 | { | |
126 | char nbuf[16]; | |
127 | const char *errstr = ext3_decode_error(NULL, err, nbuf); | |
128 | ||
129 | if (bh) | |
130 | BUFFER_TRACE(bh, "abort"); | |
131 | ||
132 | if (!handle->h_err) | |
133 | handle->h_err = err; | |
134 | ||
135 | if (is_handle_aborted(handle)) | |
136 | return; | |
137 | ||
138 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
139 | caller, errstr, err_fn); | |
140 | ||
141 | journal_abort_handle(handle); | |
142 | } | |
143 | ||
144 | /* Deal with the reporting of failure conditions on a filesystem such as | |
145 | * inconsistencies detected or read IO failures. | |
146 | * | |
147 | * On ext2, we can store the error state of the filesystem in the | |
148 | * superblock. That is not possible on ext3, because we may have other | |
149 | * write ordering constraints on the superblock which prevent us from | |
150 | * writing it out straight away; and given that the journal is about to | |
151 | * be aborted, we can't rely on the current, or future, transactions to | |
152 | * write out the superblock safely. | |
153 | * | |
154 | * We'll just use the journal_abort() error code to record an error in | |
155 | * the journal instead. On recovery, the journal will compain about | |
156 | * that error until we've noted it down and cleared it. | |
157 | */ | |
158 | ||
159 | static void ext3_handle_error(struct super_block *sb) | |
160 | { | |
161 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
162 | ||
163 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
164 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
165 | ||
166 | if (sb->s_flags & MS_RDONLY) | |
167 | return; | |
168 | ||
7543fc7b | 169 | if (!test_opt (sb, ERRORS_CONT)) { |
1da177e4 LT |
170 | journal_t *journal = EXT3_SB(sb)->s_journal; |
171 | ||
172 | EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT; | |
173 | if (journal) | |
174 | journal_abort(journal, -EIO); | |
175 | } | |
7543fc7b VA |
176 | if (test_opt (sb, ERRORS_RO)) { |
177 | printk (KERN_CRIT "Remounting filesystem read-only\n"); | |
178 | sb->s_flags |= MS_RDONLY; | |
179 | } | |
180 | ext3_commit_super(sb, es, 1); | |
1da177e4 LT |
181 | if (test_opt(sb, ERRORS_PANIC)) |
182 | panic("EXT3-fs (device %s): panic forced after error\n", | |
183 | sb->s_id); | |
1da177e4 LT |
184 | } |
185 | ||
186 | void ext3_error (struct super_block * sb, const char * function, | |
187 | const char * fmt, ...) | |
188 | { | |
189 | va_list args; | |
190 | ||
191 | va_start(args, fmt); | |
192 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); | |
193 | vprintk(fmt, args); | |
194 | printk("\n"); | |
195 | va_end(args); | |
196 | ||
197 | ext3_handle_error(sb); | |
198 | } | |
199 | ||
200 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
201 | char nbuf[16]) | |
202 | { | |
203 | char *errstr = NULL; | |
204 | ||
205 | switch (errno) { | |
206 | case -EIO: | |
207 | errstr = "IO failure"; | |
208 | break; | |
209 | case -ENOMEM: | |
210 | errstr = "Out of memory"; | |
211 | break; | |
212 | case -EROFS: | |
213 | if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT) | |
214 | errstr = "Journal has aborted"; | |
215 | else | |
216 | errstr = "Readonly filesystem"; | |
217 | break; | |
218 | default: | |
219 | /* If the caller passed in an extra buffer for unknown | |
220 | * errors, textualise them now. Else we just return | |
221 | * NULL. */ | |
222 | if (nbuf) { | |
223 | /* Check for truncated error codes... */ | |
224 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
225 | errstr = nbuf; | |
226 | } | |
227 | break; | |
228 | } | |
229 | ||
230 | return errstr; | |
231 | } | |
232 | ||
233 | /* __ext3_std_error decodes expected errors from journaling functions | |
234 | * automatically and invokes the appropriate error response. */ | |
235 | ||
236 | void __ext3_std_error (struct super_block * sb, const char * function, | |
237 | int errno) | |
238 | { | |
239 | char nbuf[16]; | |
30121624 | 240 | const char *errstr; |
1da177e4 | 241 | |
30121624 ST |
242 | /* Special case: if the error is EROFS, and we're not already |
243 | * inside a transaction, then there's really no point in logging | |
244 | * an error. */ | |
245 | if (errno == -EROFS && journal_current_handle() == NULL && | |
246 | (sb->s_flags & MS_RDONLY)) | |
247 | return; | |
248 | ||
249 | errstr = ext3_decode_error(sb, errno, nbuf); | |
1da177e4 LT |
250 | printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n", |
251 | sb->s_id, function, errstr); | |
252 | ||
253 | ext3_handle_error(sb); | |
254 | } | |
255 | ||
256 | /* | |
257 | * ext3_abort is a much stronger failure handler than ext3_error. The | |
258 | * abort function may be used to deal with unrecoverable failures such | |
259 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
260 | * | |
261 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
262 | * unless the error response on the fs has been set to panic in which | |
263 | * case we take the easy way out and panic immediately. | |
264 | */ | |
265 | ||
266 | void ext3_abort (struct super_block * sb, const char * function, | |
267 | const char * fmt, ...) | |
268 | { | |
269 | va_list args; | |
270 | ||
271 | printk (KERN_CRIT "ext3_abort called.\n"); | |
272 | ||
273 | va_start(args, fmt); | |
274 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); | |
275 | vprintk(fmt, args); | |
276 | printk("\n"); | |
277 | va_end(args); | |
278 | ||
279 | if (test_opt(sb, ERRORS_PANIC)) | |
280 | panic("EXT3-fs panic from previous error\n"); | |
281 | ||
282 | if (sb->s_flags & MS_RDONLY) | |
283 | return; | |
284 | ||
285 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
286 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
287 | sb->s_flags |= MS_RDONLY; | |
288 | EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT; | |
44d6f787 HK |
289 | if (EXT3_SB(sb)->s_journal) |
290 | journal_abort(EXT3_SB(sb)->s_journal, -EIO); | |
1da177e4 LT |
291 | } |
292 | ||
293 | void ext3_warning (struct super_block * sb, const char * function, | |
294 | const char * fmt, ...) | |
295 | { | |
296 | va_list args; | |
297 | ||
298 | va_start(args, fmt); | |
299 | printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ", | |
300 | sb->s_id, function); | |
301 | vprintk(fmt, args); | |
302 | printk("\n"); | |
303 | va_end(args); | |
304 | } | |
305 | ||
306 | void ext3_update_dynamic_rev(struct super_block *sb) | |
307 | { | |
308 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
309 | ||
310 | if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV) | |
311 | return; | |
312 | ||
e05b6b52 | 313 | ext3_warning(sb, __func__, |
1da177e4 LT |
314 | "updating to rev %d because of new feature flag, " |
315 | "running e2fsck is recommended", | |
316 | EXT3_DYNAMIC_REV); | |
317 | ||
318 | es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO); | |
319 | es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE); | |
320 | es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV); | |
321 | /* leave es->s_feature_*compat flags alone */ | |
322 | /* es->s_uuid will be set by e2fsck if empty */ | |
323 | ||
324 | /* | |
325 | * The rest of the superblock fields should be zero, and if not it | |
326 | * means they are likely already in use, so leave them alone. We | |
327 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
328 | */ | |
329 | } | |
330 | ||
331 | /* | |
332 | * Open the external journal device | |
333 | */ | |
334 | static struct block_device *ext3_blkdev_get(dev_t dev) | |
335 | { | |
336 | struct block_device *bdev; | |
337 | char b[BDEVNAME_SIZE]; | |
338 | ||
339 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
340 | if (IS_ERR(bdev)) | |
341 | goto fail; | |
342 | return bdev; | |
343 | ||
344 | fail: | |
345 | printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n", | |
346 | __bdevname(dev, b), PTR_ERR(bdev)); | |
347 | return NULL; | |
348 | } | |
349 | ||
350 | /* | |
351 | * Release the journal device | |
352 | */ | |
353 | static int ext3_blkdev_put(struct block_device *bdev) | |
354 | { | |
355 | bd_release(bdev); | |
9a1c3542 | 356 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
1da177e4 LT |
357 | } |
358 | ||
359 | static int ext3_blkdev_remove(struct ext3_sb_info *sbi) | |
360 | { | |
361 | struct block_device *bdev; | |
362 | int ret = -ENODEV; | |
363 | ||
364 | bdev = sbi->journal_bdev; | |
365 | if (bdev) { | |
366 | ret = ext3_blkdev_put(bdev); | |
367 | sbi->journal_bdev = NULL; | |
368 | } | |
369 | return ret; | |
370 | } | |
371 | ||
372 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
373 | { | |
374 | return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode; | |
375 | } | |
376 | ||
377 | static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi) | |
378 | { | |
379 | struct list_head *l; | |
380 | ||
ae6ddcc5 | 381 | printk(KERN_ERR "sb orphan head is %d\n", |
1da177e4 LT |
382 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
383 | ||
384 | printk(KERN_ERR "sb_info orphan list:\n"); | |
385 | list_for_each(l, &sbi->s_orphan) { | |
386 | struct inode *inode = orphan_list_entry(l); | |
387 | printk(KERN_ERR " " | |
eee194e7 | 388 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
1da177e4 | 389 | inode->i_sb->s_id, inode->i_ino, inode, |
ae6ddcc5 | 390 | inode->i_mode, inode->i_nlink, |
1da177e4 LT |
391 | NEXT_ORPHAN(inode)); |
392 | } | |
393 | } | |
394 | ||
395 | static void ext3_put_super (struct super_block * sb) | |
396 | { | |
397 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
398 | struct ext3_super_block *es = sbi->s_es; | |
44d6f787 | 399 | int i, err; |
1da177e4 | 400 | |
6cfd0148 CH |
401 | lock_kernel(); |
402 | ||
1da177e4 | 403 | ext3_xattr_put_super(sb); |
44d6f787 HK |
404 | err = journal_destroy(sbi->s_journal); |
405 | sbi->s_journal = NULL; | |
406 | if (err < 0) | |
2d7c820e | 407 | ext3_abort(sb, __func__, "Couldn't clean up the journal"); |
44d6f787 | 408 | |
1da177e4 LT |
409 | if (!(sb->s_flags & MS_RDONLY)) { |
410 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
411 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
412 | BUFFER_TRACE(sbi->s_sbh, "marking dirty"); | |
413 | mark_buffer_dirty(sbi->s_sbh); | |
414 | ext3_commit_super(sb, es, 1); | |
415 | } | |
416 | ||
417 | for (i = 0; i < sbi->s_gdb_count; i++) | |
418 | brelse(sbi->s_group_desc[i]); | |
419 | kfree(sbi->s_group_desc); | |
420 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
421 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
422 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
423 | brelse(sbi->s_sbh); | |
424 | #ifdef CONFIG_QUOTA | |
425 | for (i = 0; i < MAXQUOTAS; i++) | |
426 | kfree(sbi->s_qf_names[i]); | |
427 | #endif | |
428 | ||
429 | /* Debugging code just in case the in-memory inode orphan list | |
430 | * isn't empty. The on-disk one can be non-empty if we've | |
431 | * detected an error and taken the fs readonly, but the | |
432 | * in-memory list had better be clean by this point. */ | |
433 | if (!list_empty(&sbi->s_orphan)) | |
434 | dump_orphan_list(sb, sbi); | |
435 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
436 | ||
f98393a6 | 437 | invalidate_bdev(sb->s_bdev); |
1da177e4 LT |
438 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
439 | /* | |
440 | * Invalidate the journal device's buffers. We don't want them | |
441 | * floating about in memory - the physical journal device may | |
442 | * hotswapped, and it breaks the `ro-after' testing code. | |
443 | */ | |
444 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 445 | invalidate_bdev(sbi->journal_bdev); |
1da177e4 LT |
446 | ext3_blkdev_remove(sbi); |
447 | } | |
448 | sb->s_fs_info = NULL; | |
5df096d6 | 449 | kfree(sbi->s_blockgroup_lock); |
1da177e4 | 450 | kfree(sbi); |
6cfd0148 CH |
451 | |
452 | unlock_kernel(); | |
1da177e4 LT |
453 | } |
454 | ||
e18b890b | 455 | static struct kmem_cache *ext3_inode_cachep; |
1da177e4 LT |
456 | |
457 | /* | |
458 | * Called inside transaction, so use GFP_NOFS | |
459 | */ | |
460 | static struct inode *ext3_alloc_inode(struct super_block *sb) | |
461 | { | |
462 | struct ext3_inode_info *ei; | |
463 | ||
e6b4f8da | 464 | ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS); |
1da177e4 LT |
465 | if (!ei) |
466 | return NULL; | |
1da177e4 LT |
467 | ei->i_block_alloc_info = NULL; |
468 | ei->vfs_inode.i_version = 1; | |
469 | return &ei->vfs_inode; | |
470 | } | |
471 | ||
472 | static void ext3_destroy_inode(struct inode *inode) | |
473 | { | |
9f7dd93d VA |
474 | if (!list_empty(&(EXT3_I(inode)->i_orphan))) { |
475 | printk("EXT3 Inode %p: orphan list check failed!\n", | |
476 | EXT3_I(inode)); | |
477 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
478 | EXT3_I(inode), sizeof(struct ext3_inode_info), | |
479 | false); | |
480 | dump_stack(); | |
481 | } | |
1da177e4 LT |
482 | kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); |
483 | } | |
484 | ||
51cc5068 | 485 | static void init_once(void *foo) |
1da177e4 LT |
486 | { |
487 | struct ext3_inode_info *ei = (struct ext3_inode_info *) foo; | |
488 | ||
a35afb83 | 489 | INIT_LIST_HEAD(&ei->i_orphan); |
1da177e4 | 490 | #ifdef CONFIG_EXT3_FS_XATTR |
a35afb83 | 491 | init_rwsem(&ei->xattr_sem); |
1da177e4 | 492 | #endif |
a35afb83 CL |
493 | mutex_init(&ei->truncate_mutex); |
494 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 495 | } |
ae6ddcc5 | 496 | |
1da177e4 LT |
497 | static int init_inodecache(void) |
498 | { | |
499 | ext3_inode_cachep = kmem_cache_create("ext3_inode_cache", | |
500 | sizeof(struct ext3_inode_info), | |
fffb60f9 PJ |
501 | 0, (SLAB_RECLAIM_ACCOUNT| |
502 | SLAB_MEM_SPREAD), | |
20c2df83 | 503 | init_once); |
1da177e4 LT |
504 | if (ext3_inode_cachep == NULL) |
505 | return -ENOMEM; | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static void destroy_inodecache(void) | |
510 | { | |
1a1d92c1 | 511 | kmem_cache_destroy(ext3_inode_cachep); |
1da177e4 LT |
512 | } |
513 | ||
514 | static void ext3_clear_inode(struct inode *inode) | |
515 | { | |
516 | struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info; | |
1da177e4 LT |
517 | ext3_discard_reservation(inode); |
518 | EXT3_I(inode)->i_block_alloc_info = NULL; | |
e6022603 AM |
519 | if (unlikely(rsv)) |
520 | kfree(rsv); | |
1da177e4 LT |
521 | } |
522 | ||
6cd37cda | 523 | static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) |
8fc2751b | 524 | { |
6cd37cda | 525 | #if defined(CONFIG_QUOTA) |
275abf5b | 526 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
8fc2751b | 527 | |
8fc2751b MB |
528 | if (sbi->s_jquota_fmt) |
529 | seq_printf(seq, ",jqfmt=%s", | |
530 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); | |
531 | ||
532 | if (sbi->s_qf_names[USRQUOTA]) | |
533 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
534 | ||
535 | if (sbi->s_qf_names[GRPQUOTA]) | |
536 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
537 | ||
538 | if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) | |
539 | seq_puts(seq, ",usrquota"); | |
540 | ||
541 | if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) | |
542 | seq_puts(seq, ",grpquota"); | |
543 | #endif | |
6cd37cda PO |
544 | } |
545 | ||
3c4cec65 JK |
546 | static char *data_mode_string(unsigned long mode) |
547 | { | |
548 | switch (mode) { | |
549 | case EXT3_MOUNT_JOURNAL_DATA: | |
550 | return "journal"; | |
551 | case EXT3_MOUNT_ORDERED_DATA: | |
552 | return "ordered"; | |
553 | case EXT3_MOUNT_WRITEBACK_DATA: | |
554 | return "writeback"; | |
555 | } | |
556 | return "unknown"; | |
557 | } | |
558 | ||
571beed8 MS |
559 | /* |
560 | * Show an option if | |
561 | * - it's set to a non-default value OR | |
562 | * - if the per-sb default is different from the global default | |
563 | */ | |
6cd37cda PO |
564 | static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) |
565 | { | |
566 | struct super_block *sb = vfs->mnt_sb; | |
571beed8 MS |
567 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
568 | struct ext3_super_block *es = sbi->s_es; | |
569 | unsigned long def_mount_opts; | |
570 | ||
571 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
572 | ||
573 | if (sbi->s_sb_block != 1) | |
574 | seq_printf(seq, ",sb=%lu", sbi->s_sb_block); | |
575 | if (test_opt(sb, MINIX_DF)) | |
576 | seq_puts(seq, ",minixdf"); | |
577 | if (test_opt(sb, GRPID)) | |
578 | seq_puts(seq, ",grpid"); | |
579 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS)) | |
580 | seq_puts(seq, ",nogrpid"); | |
581 | if (sbi->s_resuid != EXT3_DEF_RESUID || | |
582 | le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) { | |
583 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
584 | } | |
585 | if (sbi->s_resgid != EXT3_DEF_RESGID || | |
586 | le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) { | |
587 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
588 | } | |
1eca93f9 | 589 | if (test_opt(sb, ERRORS_RO)) { |
571beed8 MS |
590 | int def_errors = le16_to_cpu(es->s_errors); |
591 | ||
592 | if (def_errors == EXT3_ERRORS_PANIC || | |
1eca93f9 AK |
593 | def_errors == EXT3_ERRORS_CONTINUE) { |
594 | seq_puts(seq, ",errors=remount-ro"); | |
571beed8 MS |
595 | } |
596 | } | |
1eca93f9 AK |
597 | if (test_opt(sb, ERRORS_CONT)) |
598 | seq_puts(seq, ",errors=continue"); | |
571beed8 MS |
599 | if (test_opt(sb, ERRORS_PANIC)) |
600 | seq_puts(seq, ",errors=panic"); | |
601 | if (test_opt(sb, NO_UID32)) | |
602 | seq_puts(seq, ",nouid32"); | |
603 | if (test_opt(sb, DEBUG)) | |
604 | seq_puts(seq, ",debug"); | |
605 | if (test_opt(sb, OLDALLOC)) | |
606 | seq_puts(seq, ",oldalloc"); | |
607 | #ifdef CONFIG_EXT3_FS_XATTR | |
608 | if (test_opt(sb, XATTR_USER)) | |
609 | seq_puts(seq, ",user_xattr"); | |
610 | if (!test_opt(sb, XATTR_USER) && | |
611 | (def_mount_opts & EXT3_DEFM_XATTR_USER)) { | |
612 | seq_puts(seq, ",nouser_xattr"); | |
613 | } | |
614 | #endif | |
615 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
616 | if (test_opt(sb, POSIX_ACL)) | |
617 | seq_puts(seq, ",acl"); | |
618 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL)) | |
619 | seq_puts(seq, ",noacl"); | |
620 | #endif | |
621 | if (!test_opt(sb, RESERVATION)) | |
622 | seq_puts(seq, ",noreservation"); | |
623 | if (sbi->s_commit_interval) { | |
624 | seq_printf(seq, ",commit=%u", | |
625 | (unsigned) (sbi->s_commit_interval / HZ)); | |
626 | } | |
627 | if (test_opt(sb, BARRIER)) | |
628 | seq_puts(seq, ",barrier=1"); | |
629 | if (test_opt(sb, NOBH)) | |
630 | seq_puts(seq, ",nobh"); | |
6cd37cda | 631 | |
3c4cec65 JK |
632 | seq_printf(seq, ",data=%s", data_mode_string(sbi->s_mount_opt & |
633 | EXT3_MOUNT_DATA_FLAGS)); | |
0e4fb5e2 HK |
634 | if (test_opt(sb, DATA_ERR_ABORT)) |
635 | seq_puts(seq, ",data_err=abort"); | |
636 | ||
6cd37cda | 637 | ext3_show_quota_options(seq, sb); |
8fc2751b MB |
638 | |
639 | return 0; | |
640 | } | |
1da177e4 | 641 | |
fdb36673 | 642 | |
74af0baa CH |
643 | static struct inode *ext3_nfs_get_inode(struct super_block *sb, |
644 | u64 ino, u32 generation) | |
fdb36673 | 645 | { |
fdb36673 | 646 | struct inode *inode; |
fdb36673 N |
647 | |
648 | if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO) | |
649 | return ERR_PTR(-ESTALE); | |
650 | if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) | |
651 | return ERR_PTR(-ESTALE); | |
652 | ||
653 | /* iget isn't really right if the inode is currently unallocated!! | |
654 | * | |
655 | * ext3_read_inode will return a bad_inode if the inode had been | |
656 | * deleted, so we should be safe. | |
657 | * | |
658 | * Currently we don't know the generation for parent directory, so | |
659 | * a generation of 0 means "accept any" | |
660 | */ | |
473043dc DH |
661 | inode = ext3_iget(sb, ino); |
662 | if (IS_ERR(inode)) | |
663 | return ERR_CAST(inode); | |
664 | if (generation && inode->i_generation != generation) { | |
fdb36673 N |
665 | iput(inode); |
666 | return ERR_PTR(-ESTALE); | |
667 | } | |
74af0baa CH |
668 | |
669 | return inode; | |
670 | } | |
671 | ||
672 | static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
673 | int fh_len, int fh_type) | |
674 | { | |
675 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
676 | ext3_nfs_get_inode); | |
677 | } | |
678 | ||
679 | static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid, | |
680 | int fh_len, int fh_type) | |
681 | { | |
682 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
683 | ext3_nfs_get_inode); | |
fdb36673 N |
684 | } |
685 | ||
6b082b53 TO |
686 | /* |
687 | * Try to release metadata pages (indirect blocks, directories) which are | |
688 | * mapped via the block device. Since these pages could have journal heads | |
689 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
690 | * jbd layer's try_to_free_buffers() function to release them. | |
691 | */ | |
692 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, | |
693 | gfp_t wait) | |
694 | { | |
695 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
696 | ||
697 | WARN_ON(PageChecked(page)); | |
698 | if (!page_has_buffers(page)) | |
699 | return 0; | |
700 | if (journal) | |
701 | return journal_try_to_free_buffers(journal, page, | |
702 | wait & ~__GFP_WAIT); | |
703 | return try_to_free_buffers(page); | |
704 | } | |
705 | ||
8fc2751b | 706 | #ifdef CONFIG_QUOTA |
1da177e4 LT |
707 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
708 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) | |
709 | ||
1da177e4 LT |
710 | static int ext3_write_dquot(struct dquot *dquot); |
711 | static int ext3_acquire_dquot(struct dquot *dquot); | |
712 | static int ext3_release_dquot(struct dquot *dquot); | |
713 | static int ext3_mark_dquot_dirty(struct dquot *dquot); | |
714 | static int ext3_write_info(struct super_block *sb, int type); | |
2fd83a4f JK |
715 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, |
716 | char *path, int remount); | |
1da177e4 LT |
717 | static int ext3_quota_on_mount(struct super_block *sb, int type); |
718 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
719 | size_t len, loff_t off); | |
720 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
721 | const char *data, size_t len, loff_t off); | |
722 | ||
723 | static struct dquot_operations ext3_quota_operations = { | |
a219ce37 JK |
724 | .initialize = dquot_initialize, |
725 | .drop = dquot_drop, | |
1da177e4 LT |
726 | .alloc_space = dquot_alloc_space, |
727 | .alloc_inode = dquot_alloc_inode, | |
728 | .free_space = dquot_free_space, | |
729 | .free_inode = dquot_free_inode, | |
730 | .transfer = dquot_transfer, | |
731 | .write_dquot = ext3_write_dquot, | |
732 | .acquire_dquot = ext3_acquire_dquot, | |
733 | .release_dquot = ext3_release_dquot, | |
734 | .mark_dirty = ext3_mark_dquot_dirty, | |
157091a2 JK |
735 | .write_info = ext3_write_info, |
736 | .alloc_dquot = dquot_alloc, | |
737 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
738 | }; |
739 | ||
740 | static struct quotactl_ops ext3_qctl_operations = { | |
741 | .quota_on = ext3_quota_on, | |
742 | .quota_off = vfs_quota_off, | |
743 | .quota_sync = vfs_quota_sync, | |
744 | .get_info = vfs_get_dqinfo, | |
745 | .set_info = vfs_set_dqinfo, | |
746 | .get_dqblk = vfs_get_dqblk, | |
747 | .set_dqblk = vfs_set_dqblk | |
748 | }; | |
749 | #endif | |
750 | ||
ee9b6d61 | 751 | static const struct super_operations ext3_sops = { |
1da177e4 LT |
752 | .alloc_inode = ext3_alloc_inode, |
753 | .destroy_inode = ext3_destroy_inode, | |
1da177e4 LT |
754 | .write_inode = ext3_write_inode, |
755 | .dirty_inode = ext3_dirty_inode, | |
756 | .delete_inode = ext3_delete_inode, | |
757 | .put_super = ext3_put_super, | |
1da177e4 | 758 | .sync_fs = ext3_sync_fs, |
c4be0c1d TS |
759 | .freeze_fs = ext3_freeze, |
760 | .unfreeze_fs = ext3_unfreeze, | |
1da177e4 LT |
761 | .statfs = ext3_statfs, |
762 | .remount_fs = ext3_remount, | |
763 | .clear_inode = ext3_clear_inode, | |
8fc2751b | 764 | .show_options = ext3_show_options, |
1da177e4 LT |
765 | #ifdef CONFIG_QUOTA |
766 | .quota_read = ext3_quota_read, | |
767 | .quota_write = ext3_quota_write, | |
768 | #endif | |
6b082b53 | 769 | .bdev_try_to_free_page = bdev_try_to_free_page, |
1da177e4 LT |
770 | }; |
771 | ||
39655164 | 772 | static const struct export_operations ext3_export_ops = { |
74af0baa CH |
773 | .fh_to_dentry = ext3_fh_to_dentry, |
774 | .fh_to_parent = ext3_fh_to_parent, | |
1da177e4 LT |
775 | .get_parent = ext3_get_parent, |
776 | }; | |
777 | ||
778 | enum { | |
779 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
780 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
2860b733 | 781 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, |
1da177e4 | 782 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
ade1a29e | 783 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, |
71b96257 | 784 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, |
1da177e4 | 785 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
0e4fb5e2 | 786 | Opt_data_err_abort, Opt_data_err_ignore, |
1da177e4 | 787 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1f54587b | 788 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, |
8fc2751b MB |
789 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, |
790 | Opt_grpquota | |
1da177e4 LT |
791 | }; |
792 | ||
a447c093 | 793 | static const match_table_t tokens = { |
1da177e4 LT |
794 | {Opt_bsd_df, "bsddf"}, |
795 | {Opt_minix_df, "minixdf"}, | |
796 | {Opt_grpid, "grpid"}, | |
797 | {Opt_grpid, "bsdgroups"}, | |
798 | {Opt_nogrpid, "nogrpid"}, | |
799 | {Opt_nogrpid, "sysvgroups"}, | |
800 | {Opt_resgid, "resgid=%u"}, | |
801 | {Opt_resuid, "resuid=%u"}, | |
802 | {Opt_sb, "sb=%u"}, | |
803 | {Opt_err_cont, "errors=continue"}, | |
804 | {Opt_err_panic, "errors=panic"}, | |
805 | {Opt_err_ro, "errors=remount-ro"}, | |
806 | {Opt_nouid32, "nouid32"}, | |
807 | {Opt_nocheck, "nocheck"}, | |
808 | {Opt_nocheck, "check=none"}, | |
1da177e4 LT |
809 | {Opt_debug, "debug"}, |
810 | {Opt_oldalloc, "oldalloc"}, | |
811 | {Opt_orlov, "orlov"}, | |
812 | {Opt_user_xattr, "user_xattr"}, | |
813 | {Opt_nouser_xattr, "nouser_xattr"}, | |
814 | {Opt_acl, "acl"}, | |
815 | {Opt_noacl, "noacl"}, | |
816 | {Opt_reservation, "reservation"}, | |
817 | {Opt_noreservation, "noreservation"}, | |
818 | {Opt_noload, "noload"}, | |
819 | {Opt_nobh, "nobh"}, | |
ade1a29e | 820 | {Opt_bh, "bh"}, |
1da177e4 LT |
821 | {Opt_commit, "commit=%u"}, |
822 | {Opt_journal_update, "journal=update"}, | |
823 | {Opt_journal_inum, "journal=%u"}, | |
71b96257 | 824 | {Opt_journal_dev, "journal_dev=%u"}, |
1da177e4 LT |
825 | {Opt_abort, "abort"}, |
826 | {Opt_data_journal, "data=journal"}, | |
827 | {Opt_data_ordered, "data=ordered"}, | |
828 | {Opt_data_writeback, "data=writeback"}, | |
0e4fb5e2 HK |
829 | {Opt_data_err_abort, "data_err=abort"}, |
830 | {Opt_data_err_ignore, "data_err=ignore"}, | |
1da177e4 LT |
831 | {Opt_offusrjquota, "usrjquota="}, |
832 | {Opt_usrjquota, "usrjquota=%s"}, | |
833 | {Opt_offgrpjquota, "grpjquota="}, | |
834 | {Opt_grpjquota, "grpjquota=%s"}, | |
835 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
836 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
8fc2751b | 837 | {Opt_grpquota, "grpquota"}, |
1f54587b JK |
838 | {Opt_noquota, "noquota"}, |
839 | {Opt_quota, "quota"}, | |
8fc2751b | 840 | {Opt_usrquota, "usrquota"}, |
1da177e4 | 841 | {Opt_barrier, "barrier=%u"}, |
1da177e4 | 842 | {Opt_resize, "resize"}, |
92587216 | 843 | {Opt_err, NULL}, |
1da177e4 LT |
844 | }; |
845 | ||
43d23f90 | 846 | static ext3_fsblk_t get_sb_block(void **data) |
1da177e4 | 847 | { |
e9ad5620 DK |
848 | ext3_fsblk_t sb_block; |
849 | char *options = (char *) *data; | |
1da177e4 LT |
850 | |
851 | if (!options || strncmp(options, "sb=", 3) != 0) | |
852 | return 1; /* Default location */ | |
853 | options += 3; | |
43d23f90 | 854 | /*todo: use simple_strtoll with >32bit ext3 */ |
1da177e4 LT |
855 | sb_block = simple_strtoul(options, &options, 0); |
856 | if (*options && *options != ',') { | |
857 | printk("EXT3-fs: Invalid sb specification: %s\n", | |
858 | (char *) *data); | |
859 | return 1; | |
860 | } | |
861 | if (*options == ',') | |
862 | options++; | |
863 | *data = (void *) options; | |
864 | return sb_block; | |
865 | } | |
866 | ||
71b96257 | 867 | static int parse_options (char *options, struct super_block *sb, |
eee194e7 | 868 | unsigned int *inum, unsigned long *journal_devnum, |
43d23f90 | 869 | ext3_fsblk_t *n_blocks_count, int is_remount) |
1da177e4 LT |
870 | { |
871 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
872 | char * p; | |
873 | substring_t args[MAX_OPT_ARGS]; | |
874 | int data_opt = 0; | |
875 | int option; | |
876 | #ifdef CONFIG_QUOTA | |
d06bf1d2 | 877 | int qtype, qfmt; |
1da177e4 LT |
878 | char *qname; |
879 | #endif | |
880 | ||
881 | if (!options) | |
882 | return 1; | |
883 | ||
884 | while ((p = strsep (&options, ",")) != NULL) { | |
885 | int token; | |
886 | if (!*p) | |
887 | continue; | |
888 | ||
889 | token = match_token(p, tokens, args); | |
890 | switch (token) { | |
891 | case Opt_bsd_df: | |
892 | clear_opt (sbi->s_mount_opt, MINIX_DF); | |
893 | break; | |
894 | case Opt_minix_df: | |
895 | set_opt (sbi->s_mount_opt, MINIX_DF); | |
896 | break; | |
897 | case Opt_grpid: | |
898 | set_opt (sbi->s_mount_opt, GRPID); | |
899 | break; | |
900 | case Opt_nogrpid: | |
901 | clear_opt (sbi->s_mount_opt, GRPID); | |
902 | break; | |
903 | case Opt_resuid: | |
904 | if (match_int(&args[0], &option)) | |
905 | return 0; | |
906 | sbi->s_resuid = option; | |
907 | break; | |
908 | case Opt_resgid: | |
909 | if (match_int(&args[0], &option)) | |
910 | return 0; | |
911 | sbi->s_resgid = option; | |
912 | break; | |
913 | case Opt_sb: | |
914 | /* handled by get_sb_block() instead of here */ | |
915 | /* *sb_block = match_int(&args[0]); */ | |
916 | break; | |
917 | case Opt_err_panic: | |
918 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
919 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
920 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
921 | break; | |
922 | case Opt_err_ro: | |
923 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
924 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
925 | set_opt (sbi->s_mount_opt, ERRORS_RO); | |
926 | break; | |
927 | case Opt_err_cont: | |
928 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
929 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
930 | set_opt (sbi->s_mount_opt, ERRORS_CONT); | |
931 | break; | |
932 | case Opt_nouid32: | |
933 | set_opt (sbi->s_mount_opt, NO_UID32); | |
934 | break; | |
1da177e4 LT |
935 | case Opt_nocheck: |
936 | clear_opt (sbi->s_mount_opt, CHECK); | |
937 | break; | |
938 | case Opt_debug: | |
939 | set_opt (sbi->s_mount_opt, DEBUG); | |
940 | break; | |
941 | case Opt_oldalloc: | |
942 | set_opt (sbi->s_mount_opt, OLDALLOC); | |
943 | break; | |
944 | case Opt_orlov: | |
945 | clear_opt (sbi->s_mount_opt, OLDALLOC); | |
946 | break; | |
947 | #ifdef CONFIG_EXT3_FS_XATTR | |
948 | case Opt_user_xattr: | |
949 | set_opt (sbi->s_mount_opt, XATTR_USER); | |
950 | break; | |
951 | case Opt_nouser_xattr: | |
952 | clear_opt (sbi->s_mount_opt, XATTR_USER); | |
953 | break; | |
954 | #else | |
955 | case Opt_user_xattr: | |
956 | case Opt_nouser_xattr: | |
957 | printk("EXT3 (no)user_xattr options not supported\n"); | |
958 | break; | |
959 | #endif | |
960 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
961 | case Opt_acl: | |
962 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
963 | break; | |
964 | case Opt_noacl: | |
965 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
966 | break; | |
967 | #else | |
968 | case Opt_acl: | |
969 | case Opt_noacl: | |
970 | printk("EXT3 (no)acl options not supported\n"); | |
971 | break; | |
972 | #endif | |
973 | case Opt_reservation: | |
974 | set_opt(sbi->s_mount_opt, RESERVATION); | |
975 | break; | |
976 | case Opt_noreservation: | |
977 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
978 | break; | |
979 | case Opt_journal_update: | |
980 | /* @@@ FIXME */ | |
981 | /* Eventually we will want to be able to create | |
982 | a journal file here. For now, only allow the | |
983 | user to specify an existing inode to be the | |
984 | journal file. */ | |
985 | if (is_remount) { | |
986 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
987 | "journal on remount\n"); | |
988 | return 0; | |
989 | } | |
990 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); | |
991 | break; | |
992 | case Opt_journal_inum: | |
993 | if (is_remount) { | |
994 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
995 | "journal on remount\n"); | |
996 | return 0; | |
997 | } | |
998 | if (match_int(&args[0], &option)) | |
999 | return 0; | |
1000 | *inum = option; | |
1001 | break; | |
71b96257 JL |
1002 | case Opt_journal_dev: |
1003 | if (is_remount) { | |
1004 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
1005 | "journal on remount\n"); | |
1006 | return 0; | |
1007 | } | |
1008 | if (match_int(&args[0], &option)) | |
1009 | return 0; | |
1010 | *journal_devnum = option; | |
1011 | break; | |
1da177e4 LT |
1012 | case Opt_noload: |
1013 | set_opt (sbi->s_mount_opt, NOLOAD); | |
1014 | break; | |
1015 | case Opt_commit: | |
1016 | if (match_int(&args[0], &option)) | |
1017 | return 0; | |
1018 | if (option < 0) | |
1019 | return 0; | |
1020 | if (option == 0) | |
1021 | option = JBD_DEFAULT_MAX_COMMIT_AGE; | |
1022 | sbi->s_commit_interval = HZ * option; | |
1023 | break; | |
1024 | case Opt_data_journal: | |
1025 | data_opt = EXT3_MOUNT_JOURNAL_DATA; | |
1026 | goto datacheck; | |
1027 | case Opt_data_ordered: | |
1028 | data_opt = EXT3_MOUNT_ORDERED_DATA; | |
1029 | goto datacheck; | |
1030 | case Opt_data_writeback: | |
1031 | data_opt = EXT3_MOUNT_WRITEBACK_DATA; | |
1032 | datacheck: | |
1033 | if (is_remount) { | |
1034 | if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS) | |
3c4cec65 JK |
1035 | == data_opt) |
1036 | break; | |
1037 | printk(KERN_ERR | |
1038 | "EXT3-fs (device %s): Cannot change " | |
1039 | "data mode on remount. The filesystem " | |
1040 | "is mounted in data=%s mode and you " | |
1041 | "try to remount it in data=%s mode.\n", | |
1042 | sb->s_id, | |
1043 | data_mode_string(sbi->s_mount_opt & | |
1044 | EXT3_MOUNT_DATA_FLAGS), | |
1045 | data_mode_string(data_opt)); | |
1046 | return 0; | |
1da177e4 LT |
1047 | } else { |
1048 | sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS; | |
1049 | sbi->s_mount_opt |= data_opt; | |
1050 | } | |
1051 | break; | |
0e4fb5e2 HK |
1052 | case Opt_data_err_abort: |
1053 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1054 | break; | |
1055 | case Opt_data_err_ignore: | |
1056 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1057 | break; | |
1da177e4 LT |
1058 | #ifdef CONFIG_QUOTA |
1059 | case Opt_usrjquota: | |
1060 | qtype = USRQUOTA; | |
1061 | goto set_qf_name; | |
1062 | case Opt_grpjquota: | |
1063 | qtype = GRPQUOTA; | |
1064 | set_qf_name: | |
ee0d5ffe | 1065 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 | 1066 | !sbi->s_qf_names[qtype]) { |
1da177e4 | 1067 | printk(KERN_ERR |
99aeaf63 | 1068 | "EXT3-fs: Cannot change journaled " |
1da177e4 LT |
1069 | "quota options when quota turned on.\n"); |
1070 | return 0; | |
1071 | } | |
1072 | qname = match_strdup(&args[0]); | |
1073 | if (!qname) { | |
1074 | printk(KERN_ERR | |
1075 | "EXT3-fs: not enough memory for " | |
1076 | "storing quotafile name.\n"); | |
1077 | return 0; | |
1078 | } | |
1079 | if (sbi->s_qf_names[qtype] && | |
1080 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1081 | printk(KERN_ERR | |
1082 | "EXT3-fs: %s quota file already " | |
1083 | "specified.\n", QTYPE2NAME(qtype)); | |
1084 | kfree(qname); | |
1085 | return 0; | |
1086 | } | |
1087 | sbi->s_qf_names[qtype] = qname; | |
1088 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1089 | printk(KERN_ERR | |
1090 | "EXT3-fs: quotafile must be on " | |
1091 | "filesystem root.\n"); | |
1092 | kfree(sbi->s_qf_names[qtype]); | |
1093 | sbi->s_qf_names[qtype] = NULL; | |
1094 | return 0; | |
1095 | } | |
1f54587b | 1096 | set_opt(sbi->s_mount_opt, QUOTA); |
1da177e4 LT |
1097 | break; |
1098 | case Opt_offusrjquota: | |
1099 | qtype = USRQUOTA; | |
1100 | goto clear_qf_name; | |
1101 | case Opt_offgrpjquota: | |
1102 | qtype = GRPQUOTA; | |
1103 | clear_qf_name: | |
ee0d5ffe | 1104 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 | 1105 | sbi->s_qf_names[qtype]) { |
1da177e4 | 1106 | printk(KERN_ERR "EXT3-fs: Cannot change " |
99aeaf63 | 1107 | "journaled quota options when " |
1da177e4 LT |
1108 | "quota turned on.\n"); |
1109 | return 0; | |
1110 | } | |
08c6a96f JK |
1111 | /* |
1112 | * The space will be released later when all options | |
1113 | * are confirmed to be correct | |
1114 | */ | |
1da177e4 LT |
1115 | sbi->s_qf_names[qtype] = NULL; |
1116 | break; | |
1117 | case Opt_jqfmt_vfsold: | |
d06bf1d2 JK |
1118 | qfmt = QFMT_VFS_OLD; |
1119 | goto set_qf_format; | |
1da177e4 | 1120 | case Opt_jqfmt_vfsv0: |
d06bf1d2 JK |
1121 | qfmt = QFMT_VFS_V0; |
1122 | set_qf_format: | |
ee0d5ffe | 1123 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 JK |
1124 | sbi->s_jquota_fmt != qfmt) { |
1125 | printk(KERN_ERR "EXT3-fs: Cannot change " | |
1126 | "journaled quota options when " | |
1127 | "quota turned on.\n"); | |
1128 | return 0; | |
1129 | } | |
1130 | sbi->s_jquota_fmt = qfmt; | |
1da177e4 | 1131 | break; |
1f54587b | 1132 | case Opt_quota: |
8fc2751b MB |
1133 | case Opt_usrquota: |
1134 | set_opt(sbi->s_mount_opt, QUOTA); | |
1135 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1136 | break; | |
1137 | case Opt_grpquota: | |
1f54587b | 1138 | set_opt(sbi->s_mount_opt, QUOTA); |
8fc2751b | 1139 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
1f54587b JK |
1140 | break; |
1141 | case Opt_noquota: | |
ee0d5ffe | 1142 | if (sb_any_quota_loaded(sb)) { |
1f54587b JK |
1143 | printk(KERN_ERR "EXT3-fs: Cannot change quota " |
1144 | "options when quota turned on.\n"); | |
1145 | return 0; | |
1146 | } | |
1147 | clear_opt(sbi->s_mount_opt, QUOTA); | |
8fc2751b MB |
1148 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1149 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1f54587b | 1150 | break; |
1da177e4 | 1151 | #else |
8fc2751b MB |
1152 | case Opt_quota: |
1153 | case Opt_usrquota: | |
1154 | case Opt_grpquota: | |
fa1ff1e0 JK |
1155 | printk(KERN_ERR |
1156 | "EXT3-fs: quota options not supported.\n"); | |
1157 | break; | |
1da177e4 LT |
1158 | case Opt_usrjquota: |
1159 | case Opt_grpjquota: | |
1160 | case Opt_offusrjquota: | |
1161 | case Opt_offgrpjquota: | |
1162 | case Opt_jqfmt_vfsold: | |
1163 | case Opt_jqfmt_vfsv0: | |
1164 | printk(KERN_ERR | |
fa1ff1e0 | 1165 | "EXT3-fs: journaled quota options not " |
1da177e4 LT |
1166 | "supported.\n"); |
1167 | break; | |
1f54587b JK |
1168 | case Opt_noquota: |
1169 | break; | |
1da177e4 LT |
1170 | #endif |
1171 | case Opt_abort: | |
1172 | set_opt(sbi->s_mount_opt, ABORT); | |
1173 | break; | |
1174 | case Opt_barrier: | |
1175 | if (match_int(&args[0], &option)) | |
1176 | return 0; | |
1177 | if (option) | |
1178 | set_opt(sbi->s_mount_opt, BARRIER); | |
1179 | else | |
1180 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1181 | break; | |
1182 | case Opt_ignore: | |
1183 | break; | |
1184 | case Opt_resize: | |
08c6a96f | 1185 | if (!is_remount) { |
1da177e4 LT |
1186 | printk("EXT3-fs: resize option only available " |
1187 | "for remount\n"); | |
1188 | return 0; | |
1189 | } | |
c7f1721e KZ |
1190 | if (match_int(&args[0], &option) != 0) |
1191 | return 0; | |
1da177e4 LT |
1192 | *n_blocks_count = option; |
1193 | break; | |
1194 | case Opt_nobh: | |
1195 | set_opt(sbi->s_mount_opt, NOBH); | |
1196 | break; | |
ade1a29e BP |
1197 | case Opt_bh: |
1198 | clear_opt(sbi->s_mount_opt, NOBH); | |
1199 | break; | |
1da177e4 LT |
1200 | default: |
1201 | printk (KERN_ERR | |
1202 | "EXT3-fs: Unrecognized mount option \"%s\" " | |
1203 | "or missing value\n", p); | |
1204 | return 0; | |
1205 | } | |
1206 | } | |
1207 | #ifdef CONFIG_QUOTA | |
8fc2751b MB |
1208 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
1209 | if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) && | |
1210 | sbi->s_qf_names[USRQUOTA]) | |
1211 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1212 | ||
1213 | if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) && | |
1214 | sbi->s_qf_names[GRPQUOTA]) | |
1215 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1216 | ||
1217 | if ((sbi->s_qf_names[USRQUOTA] && | |
1218 | (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) || | |
1219 | (sbi->s_qf_names[GRPQUOTA] && | |
1220 | (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) { | |
1221 | printk(KERN_ERR "EXT3-fs: old and new quota " | |
1222 | "format mixing.\n"); | |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | if (!sbi->s_jquota_fmt) { | |
99aeaf63 | 1227 | printk(KERN_ERR "EXT3-fs: journaled quota format " |
8fc2751b MB |
1228 | "not specified.\n"); |
1229 | return 0; | |
1230 | } | |
1231 | } else { | |
1232 | if (sbi->s_jquota_fmt) { | |
99aeaf63 JK |
1233 | printk(KERN_ERR "EXT3-fs: journaled quota format " |
1234 | "specified with no journaling " | |
8fc2751b MB |
1235 | "enabled.\n"); |
1236 | return 0; | |
1237 | } | |
1da177e4 LT |
1238 | } |
1239 | #endif | |
1da177e4 LT |
1240 | return 1; |
1241 | } | |
1242 | ||
1243 | static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es, | |
1244 | int read_only) | |
1245 | { | |
1246 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1247 | int res = 0; | |
1248 | ||
1249 | if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) { | |
1250 | printk (KERN_ERR "EXT3-fs warning: revision level too high, " | |
1251 | "forcing read-only mode\n"); | |
1252 | res = MS_RDONLY; | |
1253 | } | |
1254 | if (read_only) | |
1255 | return res; | |
1256 | if (!(sbi->s_mount_state & EXT3_VALID_FS)) | |
1257 | printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, " | |
1258 | "running e2fsck is recommended\n"); | |
1259 | else if ((sbi->s_mount_state & EXT3_ERROR_FS)) | |
1260 | printk (KERN_WARNING | |
1261 | "EXT3-fs warning: mounting fs with errors, " | |
1262 | "running e2fsck is recommended\n"); | |
1263 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && | |
1264 | le16_to_cpu(es->s_mnt_count) >= | |
1265 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
1266 | printk (KERN_WARNING | |
1267 | "EXT3-fs warning: maximal mount count reached, " | |
1268 | "running e2fsck is recommended\n"); | |
1269 | else if (le32_to_cpu(es->s_checkinterval) && | |
1270 | (le32_to_cpu(es->s_lastcheck) + | |
1271 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
1272 | printk (KERN_WARNING | |
1273 | "EXT3-fs warning: checktime reached, " | |
1274 | "running e2fsck is recommended\n"); | |
1275 | #if 0 | |
1276 | /* @@@ We _will_ want to clear the valid bit if we find | |
1277 | inconsistencies, to force a fsck at reboot. But for | |
1278 | a plain journaled filesystem we can keep it set as | |
1279 | valid forever! :) */ | |
e7f23ebd | 1280 | es->s_state &= cpu_to_le16(~EXT3_VALID_FS); |
1da177e4 LT |
1281 | #endif |
1282 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) | |
1283 | es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT); | |
50e8a289 | 1284 | le16_add_cpu(&es->s_mnt_count, 1); |
1da177e4 LT |
1285 | es->s_mtime = cpu_to_le32(get_seconds()); |
1286 | ext3_update_dynamic_rev(sb); | |
1287 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1288 | ||
1289 | ext3_commit_super(sb, es, 1); | |
1290 | if (test_opt(sb, DEBUG)) | |
1291 | printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, " | |
1292 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", | |
1293 | sb->s_blocksize, | |
1294 | sbi->s_groups_count, | |
1295 | EXT3_BLOCKS_PER_GROUP(sb), | |
1296 | EXT3_INODES_PER_GROUP(sb), | |
1297 | sbi->s_mount_opt); | |
1298 | ||
1299 | printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id); | |
1300 | if (EXT3_SB(sb)->s_journal->j_inode == NULL) { | |
1301 | char b[BDEVNAME_SIZE]; | |
1302 | ||
1303 | printk("external journal on %s\n", | |
1304 | bdevname(EXT3_SB(sb)->s_journal->j_dev, b)); | |
1305 | } else { | |
1306 | printk("internal journal\n"); | |
1307 | } | |
1da177e4 LT |
1308 | return res; |
1309 | } | |
1310 | ||
1311 | /* Called at mount-time, super-block is locked */ | |
197cd65a | 1312 | static int ext3_check_descriptors(struct super_block *sb) |
1da177e4 LT |
1313 | { |
1314 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1da177e4 LT |
1315 | int i; |
1316 | ||
1317 | ext3_debug ("Checking group descriptors"); | |
1318 | ||
197cd65a AM |
1319 | for (i = 0; i < sbi->s_groups_count; i++) { |
1320 | struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL); | |
1eaafeae AM |
1321 | ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i); |
1322 | ext3_fsblk_t last_block; | |
197cd65a | 1323 | |
855565e8 ES |
1324 | if (i == sbi->s_groups_count - 1) |
1325 | last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1; | |
1326 | else | |
1327 | last_block = first_block + | |
1328 | (EXT3_BLOCKS_PER_GROUP(sb) - 1); | |
1329 | ||
855565e8 ES |
1330 | if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || |
1331 | le32_to_cpu(gdp->bg_block_bitmap) > last_block) | |
1da177e4 LT |
1332 | { |
1333 | ext3_error (sb, "ext3_check_descriptors", | |
1334 | "Block bitmap for group %d" | |
1335 | " not in group (block %lu)!", | |
1336 | i, (unsigned long) | |
1337 | le32_to_cpu(gdp->bg_block_bitmap)); | |
1338 | return 0; | |
1339 | } | |
855565e8 ES |
1340 | if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || |
1341 | le32_to_cpu(gdp->bg_inode_bitmap) > last_block) | |
1da177e4 LT |
1342 | { |
1343 | ext3_error (sb, "ext3_check_descriptors", | |
1344 | "Inode bitmap for group %d" | |
1345 | " not in group (block %lu)!", | |
1346 | i, (unsigned long) | |
1347 | le32_to_cpu(gdp->bg_inode_bitmap)); | |
1348 | return 0; | |
1349 | } | |
855565e8 | 1350 | if (le32_to_cpu(gdp->bg_inode_table) < first_block || |
780dcdb2 | 1351 | le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 > |
855565e8 | 1352 | last_block) |
1da177e4 LT |
1353 | { |
1354 | ext3_error (sb, "ext3_check_descriptors", | |
1355 | "Inode table for group %d" | |
1356 | " not in group (block %lu)!", | |
1357 | i, (unsigned long) | |
1358 | le32_to_cpu(gdp->bg_inode_table)); | |
1359 | return 0; | |
1360 | } | |
1da177e4 LT |
1361 | } |
1362 | ||
1363 | sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb)); | |
1364 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb)); | |
1365 | return 1; | |
1366 | } | |
1367 | ||
1368 | ||
1369 | /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at | |
1370 | * the superblock) which were deleted from all directories, but held open by | |
1371 | * a process at the time of a crash. We walk the list and try to delete these | |
1372 | * inodes at recovery time (only with a read-write filesystem). | |
1373 | * | |
1374 | * In order to keep the orphan inode chain consistent during traversal (in | |
1375 | * case of crash during recovery), we link each inode into the superblock | |
1376 | * orphan list_head and handle it the same way as an inode deletion during | |
1377 | * normal operation (which journals the operations for us). | |
1378 | * | |
1379 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1380 | * accidentally point at an in-use or already deleted inode. The worst that | |
1381 | * can happen in this case is that we get a "bit already cleared" message from | |
1382 | * ext3_free_inode(). The only reason we would point at a wrong inode is if | |
1383 | * e2fsck was run on this filesystem, and it must have already done the orphan | |
1384 | * inode cleanup for us, so we can safely abort without any further action. | |
1385 | */ | |
1386 | static void ext3_orphan_cleanup (struct super_block * sb, | |
1387 | struct ext3_super_block * es) | |
1388 | { | |
1389 | unsigned int s_flags = sb->s_flags; | |
1390 | int nr_orphans = 0, nr_truncates = 0; | |
1391 | #ifdef CONFIG_QUOTA | |
1392 | int i; | |
1393 | #endif | |
1394 | if (!es->s_last_orphan) { | |
1395 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1396 | return; | |
1397 | } | |
1398 | ||
a8f48a95 ES |
1399 | if (bdev_read_only(sb->s_bdev)) { |
1400 | printk(KERN_ERR "EXT3-fs: write access " | |
1401 | "unavailable, skipping orphan cleanup.\n"); | |
1402 | return; | |
1403 | } | |
1404 | ||
1da177e4 LT |
1405 | if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { |
1406 | if (es->s_last_orphan) | |
1407 | jbd_debug(1, "Errors on filesystem, " | |
1408 | "clearing orphan list.\n"); | |
1409 | es->s_last_orphan = 0; | |
1410 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1411 | return; | |
1412 | } | |
1413 | ||
1414 | if (s_flags & MS_RDONLY) { | |
1415 | printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n", | |
1416 | sb->s_id); | |
1417 | sb->s_flags &= ~MS_RDONLY; | |
1418 | } | |
1419 | #ifdef CONFIG_QUOTA | |
1420 | /* Needed for iput() to work correctly and not trash data */ | |
1421 | sb->s_flags |= MS_ACTIVE; | |
1422 | /* Turn on quotas so that they are updated correctly */ | |
1423 | for (i = 0; i < MAXQUOTAS; i++) { | |
1424 | if (EXT3_SB(sb)->s_qf_names[i]) { | |
1425 | int ret = ext3_quota_on_mount(sb, i); | |
1426 | if (ret < 0) | |
1427 | printk(KERN_ERR | |
99aeaf63 | 1428 | "EXT3-fs: Cannot turn on journaled " |
1da177e4 LT |
1429 | "quota: error %d\n", ret); |
1430 | } | |
1431 | } | |
1432 | #endif | |
1433 | ||
1434 | while (es->s_last_orphan) { | |
1435 | struct inode *inode; | |
1436 | ||
473043dc DH |
1437 | inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1438 | if (IS_ERR(inode)) { | |
1da177e4 LT |
1439 | es->s_last_orphan = 0; |
1440 | break; | |
1441 | } | |
1442 | ||
1443 | list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan); | |
81a05227 | 1444 | vfs_dq_init(inode); |
1da177e4 LT |
1445 | if (inode->i_nlink) { |
1446 | printk(KERN_DEBUG | |
eee194e7 | 1447 | "%s: truncating inode %lu to %Ld bytes\n", |
e05b6b52 | 1448 | __func__, inode->i_ino, inode->i_size); |
eee194e7 | 1449 | jbd_debug(2, "truncating inode %lu to %Ld bytes\n", |
1da177e4 LT |
1450 | inode->i_ino, inode->i_size); |
1451 | ext3_truncate(inode); | |
1452 | nr_truncates++; | |
1453 | } else { | |
1454 | printk(KERN_DEBUG | |
eee194e7 | 1455 | "%s: deleting unreferenced inode %lu\n", |
e05b6b52 | 1456 | __func__, inode->i_ino); |
eee194e7 | 1457 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1da177e4 LT |
1458 | inode->i_ino); |
1459 | nr_orphans++; | |
1460 | } | |
1461 | iput(inode); /* The delete magic happens here! */ | |
1462 | } | |
1463 | ||
1464 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" | |
1465 | ||
1466 | if (nr_orphans) | |
1467 | printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n", | |
1468 | sb->s_id, PLURAL(nr_orphans)); | |
1469 | if (nr_truncates) | |
1470 | printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n", | |
1471 | sb->s_id, PLURAL(nr_truncates)); | |
1472 | #ifdef CONFIG_QUOTA | |
1473 | /* Turn quotas off */ | |
1474 | for (i = 0; i < MAXQUOTAS; i++) { | |
1475 | if (sb_dqopt(sb)->files[i]) | |
2fd83a4f | 1476 | vfs_quota_off(sb, i, 0); |
1da177e4 LT |
1477 | } |
1478 | #endif | |
1479 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1480 | } | |
1481 | ||
1da177e4 LT |
1482 | /* |
1483 | * Maximal file size. There is a direct, and {,double-,triple-}indirect | |
1484 | * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. | |
1485 | * We need to be 1 filesystem block less than the 2^32 sector limit. | |
1486 | */ | |
1487 | static loff_t ext3_max_size(int bits) | |
1488 | { | |
1489 | loff_t res = EXT3_NDIR_BLOCKS; | |
fe7fdc37 AK |
1490 | int meta_blocks; |
1491 | loff_t upper_limit; | |
1492 | ||
1493 | /* This is calculated to be the largest file size for a | |
1494 | * dense, file such that the total number of | |
1da177e4 | 1495 | * sectors in the file, including data and all indirect blocks, |
fe7fdc37 AK |
1496 | * does not exceed 2^32 -1 |
1497 | * __u32 i_blocks representing the total number of | |
1498 | * 512 bytes blocks of the file | |
1499 | */ | |
1500 | upper_limit = (1LL << 32) - 1; | |
1501 | ||
1502 | /* total blocks in file system block size */ | |
1503 | upper_limit >>= (bits - 9); | |
1504 | ||
1505 | ||
1506 | /* indirect blocks */ | |
1507 | meta_blocks = 1; | |
1508 | /* double indirect blocks */ | |
1509 | meta_blocks += 1 + (1LL << (bits-2)); | |
1510 | /* tripple indirect blocks */ | |
1511 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1512 | ||
1513 | upper_limit -= meta_blocks; | |
1514 | upper_limit <<= bits; | |
1da177e4 LT |
1515 | |
1516 | res += 1LL << (bits-2); | |
1517 | res += 1LL << (2*(bits-2)); | |
1518 | res += 1LL << (3*(bits-2)); | |
1519 | res <<= bits; | |
1520 | if (res > upper_limit) | |
1521 | res = upper_limit; | |
fe7fdc37 AK |
1522 | |
1523 | if (res > MAX_LFS_FILESIZE) | |
1524 | res = MAX_LFS_FILESIZE; | |
1525 | ||
1da177e4 LT |
1526 | return res; |
1527 | } | |
1528 | ||
43d23f90 MC |
1529 | static ext3_fsblk_t descriptor_loc(struct super_block *sb, |
1530 | ext3_fsblk_t logic_sb_block, | |
1da177e4 LT |
1531 | int nr) |
1532 | { | |
1533 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 1534 | unsigned long bg, first_meta_bg; |
1da177e4 LT |
1535 | int has_super = 0; |
1536 | ||
1da177e4 LT |
1537 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
1538 | ||
1539 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) || | |
1540 | nr < first_meta_bg) | |
1541 | return (logic_sb_block + nr + 1); | |
1542 | bg = sbi->s_desc_per_block * nr; | |
1543 | if (ext3_bg_has_super(sb, bg)) | |
1544 | has_super = 1; | |
43d23f90 | 1545 | return (has_super + ext3_group_first_block_no(sb, bg)); |
1da177e4 LT |
1546 | } |
1547 | ||
1548 | ||
1549 | static int ext3_fill_super (struct super_block *sb, void *data, int silent) | |
1550 | { | |
1551 | struct buffer_head * bh; | |
1552 | struct ext3_super_block *es = NULL; | |
1553 | struct ext3_sb_info *sbi; | |
43d23f90 MC |
1554 | ext3_fsblk_t block; |
1555 | ext3_fsblk_t sb_block = get_sb_block(&data); | |
1556 | ext3_fsblk_t logic_sb_block; | |
1da177e4 | 1557 | unsigned long offset = 0; |
eee194e7 | 1558 | unsigned int journal_inum = 0; |
71b96257 | 1559 | unsigned long journal_devnum = 0; |
1da177e4 LT |
1560 | unsigned long def_mount_opts; |
1561 | struct inode *root; | |
1562 | int blocksize; | |
1563 | int hblock; | |
1564 | int db_count; | |
1565 | int i; | |
1566 | int needs_recovery; | |
473043dc | 1567 | int ret = -EINVAL; |
1da177e4 | 1568 | __le32 features; |
833f4077 | 1569 | int err; |
1da177e4 | 1570 | |
f8314dc6 | 1571 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
1572 | if (!sbi) |
1573 | return -ENOMEM; | |
5df096d6 PE |
1574 | |
1575 | sbi->s_blockgroup_lock = | |
1576 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
1577 | if (!sbi->s_blockgroup_lock) { | |
1578 | kfree(sbi); | |
1579 | return -ENOMEM; | |
1580 | } | |
1da177e4 | 1581 | sb->s_fs_info = sbi; |
1da177e4 LT |
1582 | sbi->s_mount_opt = 0; |
1583 | sbi->s_resuid = EXT3_DEF_RESUID; | |
1584 | sbi->s_resgid = EXT3_DEF_RESGID; | |
571beed8 | 1585 | sbi->s_sb_block = sb_block; |
1da177e4 LT |
1586 | |
1587 | unlock_kernel(); | |
1588 | ||
1589 | blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); | |
1590 | if (!blocksize) { | |
1591 | printk(KERN_ERR "EXT3-fs: unable to set blocksize\n"); | |
1592 | goto out_fail; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * The ext3 superblock will not be buffer aligned for other than 1kB | |
1597 | * block sizes. We need to calculate the offset from buffer start. | |
1598 | */ | |
1599 | if (blocksize != EXT3_MIN_BLOCK_SIZE) { | |
1600 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; | |
1601 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1602 | } else { | |
1603 | logic_sb_block = sb_block; | |
1604 | } | |
1605 | ||
1606 | if (!(bh = sb_bread(sb, logic_sb_block))) { | |
1607 | printk (KERN_ERR "EXT3-fs: unable to read superblock\n"); | |
1608 | goto out_fail; | |
1609 | } | |
1610 | /* | |
1611 | * Note: s_es must be initialized as soon as possible because | |
1612 | * some ext3 macro-instructions depend on its value | |
1613 | */ | |
1614 | es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); | |
1615 | sbi->s_es = es; | |
1616 | sb->s_magic = le16_to_cpu(es->s_magic); | |
1617 | if (sb->s_magic != EXT3_SUPER_MAGIC) | |
1618 | goto cantfind_ext3; | |
1619 | ||
1620 | /* Set defaults before we parse the mount options */ | |
1621 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
1622 | if (def_mount_opts & EXT3_DEFM_DEBUG) | |
1623 | set_opt(sbi->s_mount_opt, DEBUG); | |
1624 | if (def_mount_opts & EXT3_DEFM_BSDGROUPS) | |
1625 | set_opt(sbi->s_mount_opt, GRPID); | |
1626 | if (def_mount_opts & EXT3_DEFM_UID16) | |
1627 | set_opt(sbi->s_mount_opt, NO_UID32); | |
2e7842b8 | 1628 | #ifdef CONFIG_EXT3_FS_XATTR |
1da177e4 LT |
1629 | if (def_mount_opts & EXT3_DEFM_XATTR_USER) |
1630 | set_opt(sbi->s_mount_opt, XATTR_USER); | |
2e7842b8 HD |
1631 | #endif |
1632 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1da177e4 LT |
1633 | if (def_mount_opts & EXT3_DEFM_ACL) |
1634 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
2e7842b8 | 1635 | #endif |
1da177e4 LT |
1636 | if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA) |
1637 | sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA; | |
1638 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED) | |
1639 | sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA; | |
1640 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK) | |
1641 | sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA; | |
1642 | ||
1643 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC) | |
1644 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1eca93f9 | 1645 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE) |
2245d7c2 | 1646 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
1eca93f9 AK |
1647 | else |
1648 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
1da177e4 LT |
1649 | |
1650 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
1651 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
1652 | ||
1653 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1654 | ||
71b96257 JL |
1655 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
1656 | NULL, 0)) | |
1da177e4 LT |
1657 | goto failed_mount; |
1658 | ||
1659 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1660 | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); | |
1661 | ||
1662 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV && | |
1663 | (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1664 | EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1665 | EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ae6ddcc5 | 1666 | printk(KERN_WARNING |
1da177e4 LT |
1667 | "EXT3-fs warning: feature flags set on rev 0 fs, " |
1668 | "running e2fsck is recommended\n"); | |
1669 | /* | |
1670 | * Check feature flags regardless of the revision level, since we | |
1671 | * previously didn't change the revision level when setting the flags, | |
1672 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
1673 | */ | |
1674 | features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP); | |
1675 | if (features) { | |
1676 | printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of " | |
1677 | "unsupported optional features (%x).\n", | |
1678 | sb->s_id, le32_to_cpu(features)); | |
1679 | goto failed_mount; | |
1680 | } | |
1681 | features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP); | |
1682 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
1683 | printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of " | |
1684 | "unsupported optional features (%x).\n", | |
1685 | sb->s_id, le32_to_cpu(features)); | |
1686 | goto failed_mount; | |
1687 | } | |
1688 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
1689 | ||
1690 | if (blocksize < EXT3_MIN_BLOCK_SIZE || | |
1691 | blocksize > EXT3_MAX_BLOCK_SIZE) { | |
ae6ddcc5 | 1692 | printk(KERN_ERR |
1da177e4 LT |
1693 | "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n", |
1694 | blocksize, sb->s_id); | |
1695 | goto failed_mount; | |
1696 | } | |
1697 | ||
e1defc4f | 1698 | hblock = bdev_logical_block_size(sb->s_bdev); |
1da177e4 LT |
1699 | if (sb->s_blocksize != blocksize) { |
1700 | /* | |
1701 | * Make sure the blocksize for the filesystem is larger | |
1702 | * than the hardware sectorsize for the machine. | |
1703 | */ | |
1704 | if (blocksize < hblock) { | |
1705 | printk(KERN_ERR "EXT3-fs: blocksize %d too small for " | |
1706 | "device blocksize %d.\n", blocksize, hblock); | |
1707 | goto failed_mount; | |
1708 | } | |
1709 | ||
1710 | brelse (bh); | |
0f0a89eb TS |
1711 | if (!sb_set_blocksize(sb, blocksize)) { |
1712 | printk(KERN_ERR "EXT3-fs: bad blocksize %d.\n", | |
1713 | blocksize); | |
1714 | goto out_fail; | |
1715 | } | |
1da177e4 LT |
1716 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; |
1717 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1718 | bh = sb_bread(sb, logic_sb_block); | |
1719 | if (!bh) { | |
ae6ddcc5 | 1720 | printk(KERN_ERR |
1da177e4 LT |
1721 | "EXT3-fs: Can't read superblock on 2nd try.\n"); |
1722 | goto failed_mount; | |
1723 | } | |
1724 | es = (struct ext3_super_block *)(((char *)bh->b_data) + offset); | |
1725 | sbi->s_es = es; | |
1726 | if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) { | |
ae6ddcc5 | 1727 | printk (KERN_ERR |
1da177e4 LT |
1728 | "EXT3-fs: Magic mismatch, very weird !\n"); |
1729 | goto failed_mount; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits); | |
1734 | ||
1735 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) { | |
1736 | sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE; | |
1737 | sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO; | |
1738 | } else { | |
1739 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
1740 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
1741 | if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) || | |
3fc74269 | 1742 | (!is_power_of_2(sbi->s_inode_size)) || |
1da177e4 LT |
1743 | (sbi->s_inode_size > blocksize)) { |
1744 | printk (KERN_ERR | |
1745 | "EXT3-fs: unsupported inode size: %d\n", | |
1746 | sbi->s_inode_size); | |
1747 | goto failed_mount; | |
1748 | } | |
1749 | } | |
1750 | sbi->s_frag_size = EXT3_MIN_FRAG_SIZE << | |
1751 | le32_to_cpu(es->s_log_frag_size); | |
1752 | if (blocksize != sbi->s_frag_size) { | |
1753 | printk(KERN_ERR | |
1754 | "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n", | |
1755 | sbi->s_frag_size, blocksize); | |
1756 | goto failed_mount; | |
1757 | } | |
1758 | sbi->s_frags_per_block = 1; | |
1759 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); | |
1760 | sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); | |
1761 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); | |
b47b6f38 | 1762 | if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0) |
1da177e4 LT |
1763 | goto cantfind_ext3; |
1764 | sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb); | |
1765 | if (sbi->s_inodes_per_block == 0) | |
1766 | goto cantfind_ext3; | |
1767 | sbi->s_itb_per_group = sbi->s_inodes_per_group / | |
1768 | sbi->s_inodes_per_block; | |
1769 | sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc); | |
1770 | sbi->s_sbh = bh; | |
1771 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
f0d1b0b3 DH |
1772 | sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb)); |
1773 | sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb)); | |
1da177e4 LT |
1774 | for (i=0; i < 4; i++) |
1775 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
1776 | sbi->s_def_hash_version = es->s_def_hash_version; | |
5e1f8c9e TT |
1777 | i = le32_to_cpu(es->s_flags); |
1778 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
1779 | sbi->s_hash_unsigned = 3; | |
1780 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
1781 | #ifdef __CHAR_UNSIGNED__ | |
1782 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
1783 | sbi->s_hash_unsigned = 3; | |
1784 | #else | |
1785 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
1786 | #endif | |
5e1f8c9e | 1787 | } |
1da177e4 LT |
1788 | |
1789 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
1790 | printk (KERN_ERR | |
1791 | "EXT3-fs: #blocks per group too big: %lu\n", | |
1792 | sbi->s_blocks_per_group); | |
1793 | goto failed_mount; | |
1794 | } | |
1795 | if (sbi->s_frags_per_group > blocksize * 8) { | |
1796 | printk (KERN_ERR | |
1797 | "EXT3-fs: #fragments per group too big: %lu\n", | |
1798 | sbi->s_frags_per_group); | |
1799 | goto failed_mount; | |
1800 | } | |
1801 | if (sbi->s_inodes_per_group > blocksize * 8) { | |
1802 | printk (KERN_ERR | |
1803 | "EXT3-fs: #inodes per group too big: %lu\n", | |
1804 | sbi->s_inodes_per_group); | |
1805 | goto failed_mount; | |
1806 | } | |
1807 | ||
fcd5df35 MC |
1808 | if (le32_to_cpu(es->s_blocks_count) > |
1809 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { | |
1810 | printk(KERN_ERR "EXT3-fs: filesystem on %s:" | |
1811 | " too large to mount safely\n", sb->s_id); | |
1812 | if (sizeof(sector_t) < 8) | |
90c699a9 | 1813 | printk(KERN_WARNING "EXT3-fs: CONFIG_LBDAF not " |
fcd5df35 MC |
1814 | "enabled\n"); |
1815 | goto failed_mount; | |
1816 | } | |
1817 | ||
1da177e4 LT |
1818 | if (EXT3_BLOCKS_PER_GROUP(sb) == 0) |
1819 | goto cantfind_ext3; | |
855565e8 ES |
1820 | sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - |
1821 | le32_to_cpu(es->s_first_data_block) - 1) | |
1822 | / EXT3_BLOCKS_PER_GROUP(sb)) + 1; | |
1da177e4 LT |
1823 | db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) / |
1824 | EXT3_DESC_PER_BLOCK(sb); | |
1825 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), | |
1826 | GFP_KERNEL); | |
1827 | if (sbi->s_group_desc == NULL) { | |
1828 | printk (KERN_ERR "EXT3-fs: not enough memory\n"); | |
1829 | goto failed_mount; | |
1830 | } | |
1831 | ||
5df096d6 | 1832 | bgl_lock_init(sbi->s_blockgroup_lock); |
1da177e4 LT |
1833 | |
1834 | for (i = 0; i < db_count; i++) { | |
1835 | block = descriptor_loc(sb, logic_sb_block, i); | |
1836 | sbi->s_group_desc[i] = sb_bread(sb, block); | |
1837 | if (!sbi->s_group_desc[i]) { | |
1838 | printk (KERN_ERR "EXT3-fs: " | |
1839 | "can't read group descriptor %d\n", i); | |
1840 | db_count = i; | |
1841 | goto failed_mount2; | |
1842 | } | |
1843 | } | |
1844 | if (!ext3_check_descriptors (sb)) { | |
d2e5b13c | 1845 | printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n"); |
1da177e4 LT |
1846 | goto failed_mount2; |
1847 | } | |
1848 | sbi->s_gdb_count = db_count; | |
1849 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1850 | spin_lock_init(&sbi->s_next_gen_lock); | |
0216bfcf | 1851 | |
833f4077 PZ |
1852 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
1853 | ext3_count_free_blocks(sb)); | |
1854 | if (!err) { | |
1855 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
1856 | ext3_count_free_inodes(sb)); | |
1857 | } | |
1858 | if (!err) { | |
1859 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
1860 | ext3_count_dirs(sb)); | |
1861 | } | |
1862 | if (err) { | |
1863 | printk(KERN_ERR "EXT3-fs: insufficient memory\n"); | |
1864 | goto failed_mount3; | |
1865 | } | |
0216bfcf | 1866 | |
1da177e4 LT |
1867 | /* per fileystem reservation list head & lock */ |
1868 | spin_lock_init(&sbi->s_rsv_window_lock); | |
1869 | sbi->s_rsv_window_root = RB_ROOT; | |
1870 | /* Add a single, static dummy reservation to the start of the | |
1871 | * reservation window list --- it gives us a placeholder for | |
1872 | * append-at-start-of-list which makes the allocation logic | |
1873 | * _much_ simpler. */ | |
1874 | sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1875 | sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1876 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; | |
1877 | sbi->s_rsv_window_head.rsv_goal_size = 0; | |
1878 | ext3_rsv_window_add(sb, &sbi->s_rsv_window_head); | |
1879 | ||
1880 | /* | |
1881 | * set up enough so that it can read an inode | |
1882 | */ | |
1883 | sb->s_op = &ext3_sops; | |
1884 | sb->s_export_op = &ext3_export_ops; | |
1885 | sb->s_xattr = ext3_xattr_handlers; | |
1886 | #ifdef CONFIG_QUOTA | |
1887 | sb->s_qcop = &ext3_qctl_operations; | |
1888 | sb->dq_op = &ext3_quota_operations; | |
1889 | #endif | |
1890 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
1891 | ||
1892 | sb->s_root = NULL; | |
1893 | ||
1894 | needs_recovery = (es->s_last_orphan != 0 || | |
1895 | EXT3_HAS_INCOMPAT_FEATURE(sb, | |
1896 | EXT3_FEATURE_INCOMPAT_RECOVER)); | |
1897 | ||
1898 | /* | |
1899 | * The first inode we look at is the journal inode. Don't try | |
1900 | * root first: it may be modified in the journal! | |
1901 | */ | |
1902 | if (!test_opt(sb, NOLOAD) && | |
1903 | EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { | |
71b96257 | 1904 | if (ext3_load_journal(sb, es, journal_devnum)) |
0216bfcf | 1905 | goto failed_mount3; |
1da177e4 LT |
1906 | } else if (journal_inum) { |
1907 | if (ext3_create_journal(sb, es, journal_inum)) | |
0216bfcf | 1908 | goto failed_mount3; |
1da177e4 LT |
1909 | } else { |
1910 | if (!silent) | |
1911 | printk (KERN_ERR | |
1912 | "ext3: No journal on filesystem on %s\n", | |
1913 | sb->s_id); | |
0216bfcf | 1914 | goto failed_mount3; |
1da177e4 LT |
1915 | } |
1916 | ||
1917 | /* We have now updated the journal if required, so we can | |
1918 | * validate the data journaling mode. */ | |
1919 | switch (test_opt(sb, DATA_FLAGS)) { | |
1920 | case 0: | |
1921 | /* No mode set, assume a default based on the journal | |
1922 | capabilities: ORDERED_DATA if the journal can | |
1923 | cope, else JOURNAL_DATA */ | |
1924 | if (journal_check_available_features | |
1925 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) | |
bbae8bcc | 1926 | set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE); |
1da177e4 LT |
1927 | else |
1928 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
1929 | break; | |
1930 | ||
1931 | case EXT3_MOUNT_ORDERED_DATA: | |
1932 | case EXT3_MOUNT_WRITEBACK_DATA: | |
1933 | if (!journal_check_available_features | |
1934 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) { | |
1935 | printk(KERN_ERR "EXT3-fs: Journal does not support " | |
1936 | "requested data journaling mode\n"); | |
0216bfcf | 1937 | goto failed_mount4; |
1da177e4 LT |
1938 | } |
1939 | default: | |
1940 | break; | |
1941 | } | |
1942 | ||
1943 | if (test_opt(sb, NOBH)) { | |
1da177e4 LT |
1944 | if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) { |
1945 | printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - " | |
1946 | "its supported only with writeback mode\n"); | |
1947 | clear_opt(sbi->s_mount_opt, NOBH); | |
1948 | } | |
1949 | } | |
1950 | /* | |
1951 | * The journal_load will have done any necessary log recovery, | |
1952 | * so we can safely mount the rest of the filesystem now. | |
1953 | */ | |
1954 | ||
473043dc DH |
1955 | root = ext3_iget(sb, EXT3_ROOT_INO); |
1956 | if (IS_ERR(root)) { | |
1da177e4 | 1957 | printk(KERN_ERR "EXT3-fs: get root inode failed\n"); |
473043dc | 1958 | ret = PTR_ERR(root); |
0216bfcf | 1959 | goto failed_mount4; |
1da177e4 LT |
1960 | } |
1961 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
473043dc | 1962 | iput(root); |
1da177e4 | 1963 | printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n"); |
0216bfcf | 1964 | goto failed_mount4; |
1da177e4 | 1965 | } |
473043dc DH |
1966 | sb->s_root = d_alloc_root(root); |
1967 | if (!sb->s_root) { | |
1968 | printk(KERN_ERR "EXT3-fs: get root dentry failed\n"); | |
1969 | iput(root); | |
1970 | ret = -ENOMEM; | |
1971 | goto failed_mount4; | |
1972 | } | |
1da177e4 LT |
1973 | |
1974 | ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY); | |
1975 | /* | |
1976 | * akpm: core read_super() calls in here with the superblock locked. | |
1977 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
1978 | * in numerous places. Here we just pop the lock - it's relatively | |
1979 | * harmless, because we are now ready to accept write_super() requests, | |
1980 | * and aviro says that's the only reason for hanging onto the | |
1981 | * superblock lock. | |
1982 | */ | |
1983 | EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS; | |
1984 | ext3_orphan_cleanup(sb, es); | |
1985 | EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS; | |
1986 | if (needs_recovery) | |
1987 | printk (KERN_INFO "EXT3-fs: recovery complete.\n"); | |
1988 | ext3_mark_recovery_complete(sb, es); | |
1989 | printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n", | |
1990 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal": | |
1991 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered": | |
1992 | "writeback"); | |
1993 | ||
1da177e4 LT |
1994 | lock_kernel(); |
1995 | return 0; | |
1996 | ||
1997 | cantfind_ext3: | |
1998 | if (!silent) | |
1999 | printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n", | |
2000 | sb->s_id); | |
2001 | goto failed_mount; | |
2002 | ||
0216bfcf | 2003 | failed_mount4: |
1da177e4 | 2004 | journal_destroy(sbi->s_journal); |
0216bfcf MC |
2005 | failed_mount3: |
2006 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2007 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2008 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
1da177e4 LT |
2009 | failed_mount2: |
2010 | for (i = 0; i < db_count; i++) | |
2011 | brelse(sbi->s_group_desc[i]); | |
2012 | kfree(sbi->s_group_desc); | |
2013 | failed_mount: | |
2014 | #ifdef CONFIG_QUOTA | |
2015 | for (i = 0; i < MAXQUOTAS; i++) | |
2016 | kfree(sbi->s_qf_names[i]); | |
2017 | #endif | |
2018 | ext3_blkdev_remove(sbi); | |
2019 | brelse(bh); | |
2020 | out_fail: | |
2021 | sb->s_fs_info = NULL; | |
de5ce037 | 2022 | kfree(sbi->s_blockgroup_lock); |
1da177e4 LT |
2023 | kfree(sbi); |
2024 | lock_kernel(); | |
473043dc | 2025 | return ret; |
1da177e4 LT |
2026 | } |
2027 | ||
2028 | /* | |
2029 | * Setup any per-fs journal parameters now. We'll do this both on | |
2030 | * initial mount, once the journal has been initialised but before we've | |
ae6ddcc5 | 2031 | * done any recovery; and again on any subsequent remount. |
1da177e4 LT |
2032 | */ |
2033 | static void ext3_init_journal_params(struct super_block *sb, journal_t *journal) | |
2034 | { | |
2035 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
2036 | ||
2037 | if (sbi->s_commit_interval) | |
2038 | journal->j_commit_interval = sbi->s_commit_interval; | |
2039 | /* We could also set up an ext3-specific default for the commit | |
2040 | * interval here, but for now we'll just fall back to the jbd | |
2041 | * default. */ | |
2042 | ||
2043 | spin_lock(&journal->j_state_lock); | |
2044 | if (test_opt(sb, BARRIER)) | |
2045 | journal->j_flags |= JFS_BARRIER; | |
2046 | else | |
2047 | journal->j_flags &= ~JFS_BARRIER; | |
0e4fb5e2 HK |
2048 | if (test_opt(sb, DATA_ERR_ABORT)) |
2049 | journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR; | |
2050 | else | |
2051 | journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR; | |
1da177e4 LT |
2052 | spin_unlock(&journal->j_state_lock); |
2053 | } | |
2054 | ||
eee194e7 ES |
2055 | static journal_t *ext3_get_journal(struct super_block *sb, |
2056 | unsigned int journal_inum) | |
1da177e4 LT |
2057 | { |
2058 | struct inode *journal_inode; | |
2059 | journal_t *journal; | |
2060 | ||
2061 | /* First, test for the existence of a valid inode on disk. Bad | |
2062 | * things happen if we iget() an unused inode, as the subsequent | |
2063 | * iput() will try to delete it. */ | |
2064 | ||
473043dc DH |
2065 | journal_inode = ext3_iget(sb, journal_inum); |
2066 | if (IS_ERR(journal_inode)) { | |
1da177e4 LT |
2067 | printk(KERN_ERR "EXT3-fs: no journal found.\n"); |
2068 | return NULL; | |
2069 | } | |
2070 | if (!journal_inode->i_nlink) { | |
2071 | make_bad_inode(journal_inode); | |
2072 | iput(journal_inode); | |
2073 | printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n"); | |
2074 | return NULL; | |
2075 | } | |
2076 | ||
2077 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", | |
2078 | journal_inode, journal_inode->i_size); | |
473043dc | 2079 | if (!S_ISREG(journal_inode->i_mode)) { |
1da177e4 LT |
2080 | printk(KERN_ERR "EXT3-fs: invalid journal inode.\n"); |
2081 | iput(journal_inode); | |
2082 | return NULL; | |
2083 | } | |
2084 | ||
2085 | journal = journal_init_inode(journal_inode); | |
2086 | if (!journal) { | |
2087 | printk(KERN_ERR "EXT3-fs: Could not load journal inode\n"); | |
2088 | iput(journal_inode); | |
2089 | return NULL; | |
2090 | } | |
2091 | journal->j_private = sb; | |
2092 | ext3_init_journal_params(sb, journal); | |
2093 | return journal; | |
2094 | } | |
2095 | ||
2096 | static journal_t *ext3_get_dev_journal(struct super_block *sb, | |
2097 | dev_t j_dev) | |
2098 | { | |
2099 | struct buffer_head * bh; | |
2100 | journal_t *journal; | |
43d23f90 | 2101 | ext3_fsblk_t start; |
1c2bf374 | 2102 | ext3_fsblk_t len; |
1da177e4 | 2103 | int hblock, blocksize; |
43d23f90 | 2104 | ext3_fsblk_t sb_block; |
1da177e4 LT |
2105 | unsigned long offset; |
2106 | struct ext3_super_block * es; | |
2107 | struct block_device *bdev; | |
2108 | ||
2109 | bdev = ext3_blkdev_get(j_dev); | |
2110 | if (bdev == NULL) | |
2111 | return NULL; | |
2112 | ||
2113 | if (bd_claim(bdev, sb)) { | |
2114 | printk(KERN_ERR | |
2115 | "EXT3: failed to claim external journal device.\n"); | |
9a1c3542 | 2116 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
1da177e4 LT |
2117 | return NULL; |
2118 | } | |
2119 | ||
2120 | blocksize = sb->s_blocksize; | |
e1defc4f | 2121 | hblock = bdev_logical_block_size(bdev); |
1da177e4 LT |
2122 | if (blocksize < hblock) { |
2123 | printk(KERN_ERR | |
2124 | "EXT3-fs: blocksize too small for journal device.\n"); | |
2125 | goto out_bdev; | |
2126 | } | |
2127 | ||
2128 | sb_block = EXT3_MIN_BLOCK_SIZE / blocksize; | |
2129 | offset = EXT3_MIN_BLOCK_SIZE % blocksize; | |
2130 | set_blocksize(bdev, blocksize); | |
2131 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
2132 | printk(KERN_ERR "EXT3-fs: couldn't read superblock of " | |
2133 | "external journal\n"); | |
2134 | goto out_bdev; | |
2135 | } | |
2136 | ||
2137 | es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); | |
2138 | if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) || | |
2139 | !(le32_to_cpu(es->s_feature_incompat) & | |
2140 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
2141 | printk(KERN_ERR "EXT3-fs: external journal has " | |
2142 | "bad superblock\n"); | |
2143 | brelse(bh); | |
2144 | goto out_bdev; | |
2145 | } | |
2146 | ||
2147 | if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { | |
2148 | printk(KERN_ERR "EXT3-fs: journal UUID does not match\n"); | |
2149 | brelse(bh); | |
2150 | goto out_bdev; | |
2151 | } | |
2152 | ||
2153 | len = le32_to_cpu(es->s_blocks_count); | |
2154 | start = sb_block + 1; | |
2155 | brelse(bh); /* we're done with the superblock */ | |
2156 | ||
2157 | journal = journal_init_dev(bdev, sb->s_bdev, | |
2158 | start, len, blocksize); | |
2159 | if (!journal) { | |
2160 | printk(KERN_ERR "EXT3-fs: failed to create device journal\n"); | |
2161 | goto out_bdev; | |
2162 | } | |
2163 | journal->j_private = sb; | |
2164 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2165 | wait_on_buffer(journal->j_sb_buffer); | |
2166 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
2167 | printk(KERN_ERR "EXT3-fs: I/O error on journal device\n"); | |
2168 | goto out_journal; | |
2169 | } | |
2170 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
2171 | printk(KERN_ERR "EXT3-fs: External journal has more than one " | |
2172 | "user (unsupported) - %d\n", | |
2173 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
2174 | goto out_journal; | |
2175 | } | |
2176 | EXT3_SB(sb)->journal_bdev = bdev; | |
2177 | ext3_init_journal_params(sb, journal); | |
2178 | return journal; | |
2179 | out_journal: | |
2180 | journal_destroy(journal); | |
2181 | out_bdev: | |
2182 | ext3_blkdev_put(bdev); | |
2183 | return NULL; | |
2184 | } | |
2185 | ||
71b96257 JL |
2186 | static int ext3_load_journal(struct super_block *sb, |
2187 | struct ext3_super_block *es, | |
2188 | unsigned long journal_devnum) | |
1da177e4 LT |
2189 | { |
2190 | journal_t *journal; | |
eee194e7 | 2191 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
71b96257 | 2192 | dev_t journal_dev; |
1da177e4 LT |
2193 | int err = 0; |
2194 | int really_read_only; | |
2195 | ||
71b96257 JL |
2196 | if (journal_devnum && |
2197 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2198 | printk(KERN_INFO "EXT3-fs: external journal device major/minor " | |
2199 | "numbers have changed\n"); | |
2200 | journal_dev = new_decode_dev(journal_devnum); | |
2201 | } else | |
2202 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2203 | ||
1da177e4 LT |
2204 | really_read_only = bdev_read_only(sb->s_bdev); |
2205 | ||
2206 | /* | |
2207 | * Are we loading a blank journal or performing recovery after a | |
2208 | * crash? For recovery, we need to check in advance whether we | |
2209 | * can get read-write access to the device. | |
2210 | */ | |
2211 | ||
2212 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) { | |
2213 | if (sb->s_flags & MS_RDONLY) { | |
2214 | printk(KERN_INFO "EXT3-fs: INFO: recovery " | |
2215 | "required on readonly filesystem.\n"); | |
2216 | if (really_read_only) { | |
2217 | printk(KERN_ERR "EXT3-fs: write access " | |
2218 | "unavailable, cannot proceed.\n"); | |
2219 | return -EROFS; | |
2220 | } | |
2221 | printk (KERN_INFO "EXT3-fs: write access will " | |
2222 | "be enabled during recovery.\n"); | |
2223 | } | |
2224 | } | |
2225 | ||
2226 | if (journal_inum && journal_dev) { | |
2227 | printk(KERN_ERR "EXT3-fs: filesystem has both journal " | |
2228 | "and inode journals!\n"); | |
2229 | return -EINVAL; | |
2230 | } | |
2231 | ||
2232 | if (journal_inum) { | |
2233 | if (!(journal = ext3_get_journal(sb, journal_inum))) | |
2234 | return -EINVAL; | |
2235 | } else { | |
2236 | if (!(journal = ext3_get_dev_journal(sb, journal_dev))) | |
2237 | return -EINVAL; | |
2238 | } | |
2239 | ||
2240 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { | |
2241 | err = journal_update_format(journal); | |
2242 | if (err) { | |
2243 | printk(KERN_ERR "EXT3-fs: error updating journal.\n"); | |
2244 | journal_destroy(journal); | |
2245 | return err; | |
2246 | } | |
2247 | } | |
2248 | ||
2249 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) | |
2250 | err = journal_wipe(journal, !really_read_only); | |
2251 | if (!err) | |
2252 | err = journal_load(journal); | |
2253 | ||
2254 | if (err) { | |
2255 | printk(KERN_ERR "EXT3-fs: error loading journal.\n"); | |
2256 | journal_destroy(journal); | |
2257 | return err; | |
2258 | } | |
2259 | ||
2260 | EXT3_SB(sb)->s_journal = journal; | |
2261 | ext3_clear_journal_err(sb, es); | |
71b96257 JL |
2262 | |
2263 | if (journal_devnum && | |
2264 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2265 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
71b96257 JL |
2266 | |
2267 | /* Make sure we flush the recovery flag to disk. */ | |
2268 | ext3_commit_super(sb, es, 1); | |
2269 | } | |
2270 | ||
1da177e4 LT |
2271 | return 0; |
2272 | } | |
2273 | ||
2274 | static int ext3_create_journal(struct super_block * sb, | |
2275 | struct ext3_super_block * es, | |
eee194e7 | 2276 | unsigned int journal_inum) |
1da177e4 LT |
2277 | { |
2278 | journal_t *journal; | |
952d9de1 | 2279 | int err; |
1da177e4 LT |
2280 | |
2281 | if (sb->s_flags & MS_RDONLY) { | |
2282 | printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to " | |
2283 | "create journal.\n"); | |
2284 | return -EROFS; | |
2285 | } | |
2286 | ||
952d9de1 BP |
2287 | journal = ext3_get_journal(sb, journal_inum); |
2288 | if (!journal) | |
1da177e4 LT |
2289 | return -EINVAL; |
2290 | ||
eee194e7 | 2291 | printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n", |
1da177e4 LT |
2292 | journal_inum); |
2293 | ||
952d9de1 BP |
2294 | err = journal_create(journal); |
2295 | if (err) { | |
1da177e4 LT |
2296 | printk(KERN_ERR "EXT3-fs: error creating journal.\n"); |
2297 | journal_destroy(journal); | |
2298 | return -EIO; | |
2299 | } | |
2300 | ||
2301 | EXT3_SB(sb)->s_journal = journal; | |
2302 | ||
2303 | ext3_update_dynamic_rev(sb); | |
2304 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2305 | EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL); | |
2306 | ||
2307 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
1da177e4 LT |
2308 | |
2309 | /* Make sure we flush the recovery flag to disk. */ | |
2310 | ext3_commit_super(sb, es, 1); | |
2311 | ||
2312 | return 0; | |
2313 | } | |
2314 | ||
c4be0c1d TS |
2315 | static int ext3_commit_super(struct super_block *sb, |
2316 | struct ext3_super_block *es, | |
1da177e4 LT |
2317 | int sync) |
2318 | { | |
2319 | struct buffer_head *sbh = EXT3_SB(sb)->s_sbh; | |
c4be0c1d | 2320 | int error = 0; |
1da177e4 LT |
2321 | |
2322 | if (!sbh) | |
c4be0c1d | 2323 | return error; |
1da177e4 LT |
2324 | es->s_wtime = cpu_to_le32(get_seconds()); |
2325 | es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb)); | |
2326 | es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb)); | |
2327 | BUFFER_TRACE(sbh, "marking dirty"); | |
2328 | mark_buffer_dirty(sbh); | |
2329 | if (sync) | |
c4be0c1d TS |
2330 | error = sync_dirty_buffer(sbh); |
2331 | return error; | |
1da177e4 LT |
2332 | } |
2333 | ||
2334 | ||
2335 | /* | |
2336 | * Have we just finished recovery? If so, and if we are mounting (or | |
2337 | * remounting) the filesystem readonly, then we will end up with a | |
2338 | * consistent fs on disk. Record that fact. | |
2339 | */ | |
2340 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
2341 | struct ext3_super_block * es) | |
2342 | { | |
2343 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
2344 | ||
2345 | journal_lock_updates(journal); | |
2d7c820e HK |
2346 | if (journal_flush(journal) < 0) |
2347 | goto out; | |
2348 | ||
030703e4 | 2349 | lock_super(sb); |
1da177e4 LT |
2350 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) && |
2351 | sb->s_flags & MS_RDONLY) { | |
2352 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1da177e4 LT |
2353 | ext3_commit_super(sb, es, 1); |
2354 | } | |
030703e4 | 2355 | unlock_super(sb); |
2d7c820e HK |
2356 | |
2357 | out: | |
1da177e4 LT |
2358 | journal_unlock_updates(journal); |
2359 | } | |
2360 | ||
2361 | /* | |
2362 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2363 | * has recorded an error from a previous lifetime, move that error to the | |
2364 | * main filesystem now. | |
2365 | */ | |
2366 | static void ext3_clear_journal_err(struct super_block * sb, | |
2367 | struct ext3_super_block * es) | |
2368 | { | |
2369 | journal_t *journal; | |
2370 | int j_errno; | |
2371 | const char *errstr; | |
2372 | ||
2373 | journal = EXT3_SB(sb)->s_journal; | |
2374 | ||
2375 | /* | |
2376 | * Now check for any error status which may have been recorded in the | |
2377 | * journal by a prior ext3_error() or ext3_abort() | |
2378 | */ | |
2379 | ||
2380 | j_errno = journal_errno(journal); | |
2381 | if (j_errno) { | |
2382 | char nbuf[16]; | |
2383 | ||
2384 | errstr = ext3_decode_error(sb, j_errno, nbuf); | |
e05b6b52 | 2385 | ext3_warning(sb, __func__, "Filesystem error recorded " |
1da177e4 | 2386 | "from previous mount: %s", errstr); |
e05b6b52 | 2387 | ext3_warning(sb, __func__, "Marking fs in need of " |
1da177e4 LT |
2388 | "filesystem check."); |
2389 | ||
2390 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
2391 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
2392 | ext3_commit_super (sb, es, 1); | |
2393 | ||
2394 | journal_clear_err(journal); | |
2395 | } | |
2396 | } | |
2397 | ||
2398 | /* | |
2399 | * Force the running and committing transactions to commit, | |
2400 | * and wait on the commit. | |
2401 | */ | |
2402 | int ext3_force_commit(struct super_block *sb) | |
2403 | { | |
2404 | journal_t *journal; | |
2405 | int ret; | |
2406 | ||
2407 | if (sb->s_flags & MS_RDONLY) | |
2408 | return 0; | |
2409 | ||
2410 | journal = EXT3_SB(sb)->s_journal; | |
1da177e4 LT |
2411 | ret = ext3_journal_force_commit(journal); |
2412 | return ret; | |
2413 | } | |
2414 | ||
1da177e4 LT |
2415 | static int ext3_sync_fs(struct super_block *sb, int wait) |
2416 | { | |
02ac597c | 2417 | tid_t target; |
c87591b7 | 2418 | |
02ac597c JK |
2419 | if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { |
2420 | if (wait) | |
2421 | log_wait_commit(EXT3_SB(sb)->s_journal, target); | |
2422 | } | |
1da177e4 LT |
2423 | return 0; |
2424 | } | |
2425 | ||
2426 | /* | |
2427 | * LVM calls this function before a (read-only) snapshot is created. This | |
2428 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2429 | */ | |
c4be0c1d | 2430 | static int ext3_freeze(struct super_block *sb) |
1da177e4 | 2431 | { |
c4be0c1d TS |
2432 | int error = 0; |
2433 | journal_t *journal; | |
1da177e4 LT |
2434 | |
2435 | if (!(sb->s_flags & MS_RDONLY)) { | |
c4be0c1d | 2436 | journal = EXT3_SB(sb)->s_journal; |
1da177e4 LT |
2437 | |
2438 | /* Now we set up the journal barrier. */ | |
2439 | journal_lock_updates(journal); | |
2d7c820e HK |
2440 | |
2441 | /* | |
2442 | * We don't want to clear needs_recovery flag when we failed | |
2443 | * to flush the journal. | |
2444 | */ | |
c4be0c1d TS |
2445 | error = journal_flush(journal); |
2446 | if (error < 0) | |
2447 | goto out; | |
1da177e4 LT |
2448 | |
2449 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
2450 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
c4be0c1d TS |
2451 | error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); |
2452 | if (error) | |
2453 | goto out; | |
1da177e4 | 2454 | } |
c4be0c1d TS |
2455 | return 0; |
2456 | ||
2457 | out: | |
2458 | journal_unlock_updates(journal); | |
2459 | return error; | |
1da177e4 LT |
2460 | } |
2461 | ||
2462 | /* | |
2463 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2464 | * flag here, even though the filesystem is not technically dirty yet. | |
2465 | */ | |
c4be0c1d | 2466 | static int ext3_unfreeze(struct super_block *sb) |
1da177e4 LT |
2467 | { |
2468 | if (!(sb->s_flags & MS_RDONLY)) { | |
2469 | lock_super(sb); | |
2470 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
2471 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2472 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); | |
2473 | unlock_super(sb); | |
2474 | journal_unlock_updates(EXT3_SB(sb)->s_journal); | |
2475 | } | |
c4be0c1d | 2476 | return 0; |
1da177e4 LT |
2477 | } |
2478 | ||
2479 | static int ext3_remount (struct super_block * sb, int * flags, char * data) | |
2480 | { | |
2481 | struct ext3_super_block * es; | |
2482 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 2483 | ext3_fsblk_t n_blocks_count = 0; |
08c6a96f JK |
2484 | unsigned long old_sb_flags; |
2485 | struct ext3_mount_options old_opts; | |
2486 | int err; | |
2487 | #ifdef CONFIG_QUOTA | |
2488 | int i; | |
2489 | #endif | |
2490 | ||
337eb00a AIB |
2491 | lock_kernel(); |
2492 | ||
08c6a96f | 2493 | /* Store the original options */ |
bbd6851a | 2494 | lock_super(sb); |
08c6a96f JK |
2495 | old_sb_flags = sb->s_flags; |
2496 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2497 | old_opts.s_resuid = sbi->s_resuid; | |
2498 | old_opts.s_resgid = sbi->s_resgid; | |
2499 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2500 | #ifdef CONFIG_QUOTA | |
2501 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
2502 | for (i = 0; i < MAXQUOTAS; i++) | |
2503 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
2504 | #endif | |
1da177e4 LT |
2505 | |
2506 | /* | |
2507 | * Allow the "check" option to be passed as a remount option. | |
2508 | */ | |
71b96257 | 2509 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { |
08c6a96f JK |
2510 | err = -EINVAL; |
2511 | goto restore_opts; | |
2512 | } | |
1da177e4 LT |
2513 | |
2514 | if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) | |
e05b6b52 | 2515 | ext3_abort(sb, __func__, "Abort forced by user"); |
1da177e4 LT |
2516 | |
2517 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
2518 | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); | |
2519 | ||
2520 | es = sbi->s_es; | |
2521 | ||
2522 | ext3_init_journal_params(sb, sbi->s_journal); | |
2523 | ||
2524 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
2525 | n_blocks_count > le32_to_cpu(es->s_blocks_count)) { | |
08c6a96f JK |
2526 | if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) { |
2527 | err = -EROFS; | |
2528 | goto restore_opts; | |
2529 | } | |
1da177e4 LT |
2530 | |
2531 | if (*flags & MS_RDONLY) { | |
2532 | /* | |
2533 | * First of all, the unconditional stuff we have to do | |
2534 | * to disable replay of the journal when we next remount | |
2535 | */ | |
2536 | sb->s_flags |= MS_RDONLY; | |
2537 | ||
2538 | /* | |
2539 | * OK, test if we are remounting a valid rw partition | |
2540 | * readonly, and if so set the rdonly flag and then | |
2541 | * mark the partition as valid again. | |
2542 | */ | |
2543 | if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) && | |
2544 | (sbi->s_mount_state & EXT3_VALID_FS)) | |
2545 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
2546 | ||
030703e4 JK |
2547 | /* |
2548 | * We have to unlock super so that we can wait for | |
2549 | * transactions. | |
2550 | */ | |
2551 | unlock_super(sb); | |
1da177e4 | 2552 | ext3_mark_recovery_complete(sb, es); |
030703e4 | 2553 | lock_super(sb); |
1da177e4 LT |
2554 | } else { |
2555 | __le32 ret; | |
2556 | if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb, | |
2557 | ~EXT3_FEATURE_RO_COMPAT_SUPP))) { | |
2558 | printk(KERN_WARNING "EXT3-fs: %s: couldn't " | |
2559 | "remount RDWR because of unsupported " | |
2560 | "optional features (%x).\n", | |
2561 | sb->s_id, le32_to_cpu(ret)); | |
08c6a96f JK |
2562 | err = -EROFS; |
2563 | goto restore_opts; | |
1da177e4 | 2564 | } |
ea9a05a1 ES |
2565 | |
2566 | /* | |
2567 | * If we have an unprocessed orphan list hanging | |
2568 | * around from a previously readonly bdev mount, | |
2569 | * require a full umount/remount for now. | |
2570 | */ | |
2571 | if (es->s_last_orphan) { | |
2572 | printk(KERN_WARNING "EXT3-fs: %s: couldn't " | |
2573 | "remount RDWR because of unprocessed " | |
2574 | "orphan inode list. Please " | |
2575 | "umount/remount instead.\n", | |
2576 | sb->s_id); | |
2577 | err = -EINVAL; | |
2578 | goto restore_opts; | |
2579 | } | |
2580 | ||
1da177e4 LT |
2581 | /* |
2582 | * Mounting a RDONLY partition read-write, so reread | |
2583 | * and store the current valid flag. (It may have | |
2584 | * been changed by e2fsck since we originally mounted | |
2585 | * the partition.) | |
2586 | */ | |
2587 | ext3_clear_journal_err(sb, es); | |
2588 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
a4e4de36 | 2589 | if ((err = ext3_group_extend(sb, es, n_blocks_count))) |
08c6a96f | 2590 | goto restore_opts; |
1da177e4 LT |
2591 | if (!ext3_setup_super (sb, es, 0)) |
2592 | sb->s_flags &= ~MS_RDONLY; | |
2593 | } | |
2594 | } | |
08c6a96f JK |
2595 | #ifdef CONFIG_QUOTA |
2596 | /* Release old quota file names */ | |
2597 | for (i = 0; i < MAXQUOTAS; i++) | |
2598 | if (old_opts.s_qf_names[i] && | |
2599 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2600 | kfree(old_opts.s_qf_names[i]); | |
2601 | #endif | |
bbd6851a | 2602 | unlock_super(sb); |
337eb00a | 2603 | unlock_kernel(); |
1da177e4 | 2604 | return 0; |
08c6a96f JK |
2605 | restore_opts: |
2606 | sb->s_flags = old_sb_flags; | |
2607 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
2608 | sbi->s_resuid = old_opts.s_resuid; | |
2609 | sbi->s_resgid = old_opts.s_resgid; | |
2610 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
2611 | #ifdef CONFIG_QUOTA | |
2612 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
2613 | for (i = 0; i < MAXQUOTAS; i++) { | |
2614 | if (sbi->s_qf_names[i] && | |
2615 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2616 | kfree(sbi->s_qf_names[i]); | |
2617 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
2618 | } | |
2619 | #endif | |
bbd6851a | 2620 | unlock_super(sb); |
337eb00a | 2621 | unlock_kernel(); |
08c6a96f | 2622 | return err; |
1da177e4 LT |
2623 | } |
2624 | ||
726c3342 | 2625 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf) |
1da177e4 | 2626 | { |
726c3342 | 2627 | struct super_block *sb = dentry->d_sb; |
09fe316a AT |
2628 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
2629 | struct ext3_super_block *es = sbi->s_es; | |
50ee0a32 | 2630 | u64 fsid; |
1da177e4 | 2631 | |
a71ce8c6 BP |
2632 | if (test_opt(sb, MINIX_DF)) { |
2633 | sbi->s_overhead_last = 0; | |
2634 | } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { | |
2635 | unsigned long ngroups = sbi->s_groups_count, i; | |
2636 | ext3_fsblk_t overhead = 0; | |
1da177e4 LT |
2637 | smp_rmb(); |
2638 | ||
2639 | /* | |
a71ce8c6 BP |
2640 | * Compute the overhead (FS structures). This is constant |
2641 | * for a given filesystem unless the number of block groups | |
2642 | * changes so we cache the previous value until it does. | |
1da177e4 LT |
2643 | */ |
2644 | ||
2645 | /* | |
2646 | * All of the blocks before first_data_block are | |
2647 | * overhead | |
2648 | */ | |
2649 | overhead = le32_to_cpu(es->s_first_data_block); | |
2650 | ||
2651 | /* | |
2652 | * Add the overhead attributed to the superblock and | |
2653 | * block group descriptors. If the sparse superblocks | |
2654 | * feature is turned on, then not all groups have this. | |
2655 | */ | |
2656 | for (i = 0; i < ngroups; i++) { | |
2657 | overhead += ext3_bg_has_super(sb, i) + | |
2658 | ext3_bg_num_gdb(sb, i); | |
2659 | cond_resched(); | |
2660 | } | |
2661 | ||
2662 | /* | |
2663 | * Every block group has an inode bitmap, a block | |
2664 | * bitmap, and an inode table. | |
2665 | */ | |
a71ce8c6 BP |
2666 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
2667 | sbi->s_overhead_last = overhead; | |
2668 | smp_wmb(); | |
2669 | sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); | |
1da177e4 LT |
2670 | } |
2671 | ||
2672 | buf->f_type = EXT3_SUPER_MAGIC; | |
2673 | buf->f_bsize = sb->s_blocksize; | |
a71ce8c6 | 2674 | buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last; |
52d9f3b4 | 2675 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); |
a71ce8c6 | 2676 | es->s_free_blocks_count = cpu_to_le32(buf->f_bfree); |
1da177e4 LT |
2677 | buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); |
2678 | if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) | |
2679 | buf->f_bavail = 0; | |
2680 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 2681 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
a71ce8c6 | 2682 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
1da177e4 | 2683 | buf->f_namelen = EXT3_NAME_LEN; |
50ee0a32 PE |
2684 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
2685 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
2686 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
2687 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
1da177e4 LT |
2688 | return 0; |
2689 | } | |
2690 | ||
2691 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
2692 | * is locked for write. Otherwise the are possible deadlocks: | |
2693 | * Process 1 Process 2 | |
2694 | * ext3_create() quota_sync() | |
2695 | * journal_start() write_dquot() | |
81a05227 | 2696 | * vfs_dq_init() down(dqio_mutex) |
d3be915f | 2697 | * down(dqio_mutex) journal_start() |
1da177e4 LT |
2698 | * |
2699 | */ | |
2700 | ||
2701 | #ifdef CONFIG_QUOTA | |
2702 | ||
2703 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
2704 | { | |
2705 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
2706 | } | |
2707 | ||
1da177e4 LT |
2708 | static int ext3_write_dquot(struct dquot *dquot) |
2709 | { | |
2710 | int ret, err; | |
2711 | handle_t *handle; | |
2712 | struct inode *inode; | |
2713 | ||
2714 | inode = dquot_to_inode(dquot); | |
2715 | handle = ext3_journal_start(inode, | |
1f54587b | 2716 | EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2717 | if (IS_ERR(handle)) |
2718 | return PTR_ERR(handle); | |
2719 | ret = dquot_commit(dquot); | |
2720 | err = ext3_journal_stop(handle); | |
2721 | if (!ret) | |
2722 | ret = err; | |
2723 | return ret; | |
2724 | } | |
2725 | ||
2726 | static int ext3_acquire_dquot(struct dquot *dquot) | |
2727 | { | |
2728 | int ret, err; | |
2729 | handle_t *handle; | |
2730 | ||
2731 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2732 | EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2733 | if (IS_ERR(handle)) |
2734 | return PTR_ERR(handle); | |
2735 | ret = dquot_acquire(dquot); | |
2736 | err = ext3_journal_stop(handle); | |
2737 | if (!ret) | |
2738 | ret = err; | |
2739 | return ret; | |
2740 | } | |
2741 | ||
2742 | static int ext3_release_dquot(struct dquot *dquot) | |
2743 | { | |
2744 | int ret, err; | |
2745 | handle_t *handle; | |
2746 | ||
2747 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2748 | EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
2749 | if (IS_ERR(handle)) { |
2750 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2751 | dquot_release(dquot); | |
1da177e4 | 2752 | return PTR_ERR(handle); |
9c3013e9 | 2753 | } |
1da177e4 LT |
2754 | ret = dquot_release(dquot); |
2755 | err = ext3_journal_stop(handle); | |
2756 | if (!ret) | |
2757 | ret = err; | |
2758 | return ret; | |
2759 | } | |
2760 | ||
2761 | static int ext3_mark_dquot_dirty(struct dquot *dquot) | |
2762 | { | |
99aeaf63 | 2763 | /* Are we journaling quotas? */ |
1da177e4 LT |
2764 | if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2765 | EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2766 | dquot_mark_dquot_dirty(dquot); | |
2767 | return ext3_write_dquot(dquot); | |
2768 | } else { | |
2769 | return dquot_mark_dquot_dirty(dquot); | |
2770 | } | |
2771 | } | |
2772 | ||
2773 | static int ext3_write_info(struct super_block *sb, int type) | |
2774 | { | |
2775 | int ret, err; | |
2776 | handle_t *handle; | |
2777 | ||
2778 | /* Data block + inode block */ | |
2779 | handle = ext3_journal_start(sb->s_root->d_inode, 2); | |
2780 | if (IS_ERR(handle)) | |
2781 | return PTR_ERR(handle); | |
2782 | ret = dquot_commit_info(sb, type); | |
2783 | err = ext3_journal_stop(handle); | |
2784 | if (!ret) | |
2785 | ret = err; | |
2786 | return ret; | |
2787 | } | |
2788 | ||
2789 | /* | |
2790 | * Turn on quotas during mount time - we need to find | |
2791 | * the quota file and such... | |
2792 | */ | |
2793 | static int ext3_quota_on_mount(struct super_block *sb, int type) | |
2794 | { | |
84de856e CH |
2795 | return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type], |
2796 | EXT3_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2797 | } |
2798 | ||
2799 | /* | |
2800 | * Standard function to be called on quota_on | |
2801 | */ | |
2802 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, | |
8264613d | 2803 | char *name, int remount) |
1da177e4 LT |
2804 | { |
2805 | int err; | |
8264613d | 2806 | struct path path; |
1da177e4 | 2807 | |
1f54587b JK |
2808 | if (!test_opt(sb, QUOTA)) |
2809 | return -EINVAL; | |
8264613d | 2810 | /* When remounting, no checks are needed and in fact, name is NULL */ |
9cfe7b90 | 2811 | if (remount) |
8264613d | 2812 | return vfs_quota_on(sb, type, format_id, name, remount); |
9cfe7b90 | 2813 | |
8264613d | 2814 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
1da177e4 LT |
2815 | if (err) |
2816 | return err; | |
9cfe7b90 | 2817 | |
1da177e4 | 2818 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
2819 | if (path.mnt->mnt_sb != sb) { |
2820 | path_put(&path); | |
1da177e4 LT |
2821 | return -EXDEV; |
2822 | } | |
9cfe7b90 JK |
2823 | /* Journaling quota? */ |
2824 | if (EXT3_SB(sb)->s_qf_names[type]) { | |
2825 | /* Quotafile not of fs root? */ | |
8264613d | 2826 | if (path.dentry->d_parent != sb->s_root) |
9cfe7b90 JK |
2827 | printk(KERN_WARNING |
2828 | "EXT3-fs: Quota file not on filesystem root. " | |
2829 | "Journaled quota will not work.\n"); | |
2830 | } | |
2831 | ||
2832 | /* | |
2833 | * When we journal data on quota file, we have to flush journal to see | |
2834 | * all updates to the file when we bypass pagecache... | |
2835 | */ | |
8264613d | 2836 | if (ext3_should_journal_data(path.dentry->d_inode)) { |
9cfe7b90 JK |
2837 | /* |
2838 | * We don't need to lock updates but journal_flush() could | |
2839 | * otherwise be livelocked... | |
2840 | */ | |
2841 | journal_lock_updates(EXT3_SB(sb)->s_journal); | |
2d7c820e | 2842 | err = journal_flush(EXT3_SB(sb)->s_journal); |
9cfe7b90 | 2843 | journal_unlock_updates(EXT3_SB(sb)->s_journal); |
2d7c820e | 2844 | if (err) { |
12e1ec9f | 2845 | path_put(&path); |
2d7c820e HK |
2846 | return err; |
2847 | } | |
9cfe7b90 JK |
2848 | } |
2849 | ||
8264613d AV |
2850 | err = vfs_quota_on_path(sb, type, format_id, &path); |
2851 | path_put(&path); | |
77e69dac | 2852 | return err; |
1da177e4 LT |
2853 | } |
2854 | ||
2855 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2856 | * acquiring the locks... As quota files are never truncated and quota code | |
2857 | * itself serializes the operations (and noone else should touch the files) | |
2858 | * we don't have to be afraid of races */ | |
2859 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
2860 | size_t len, loff_t off) | |
2861 | { | |
2862 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2863 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2864 | int err = 0; | |
2865 | int offset = off & (sb->s_blocksize - 1); | |
2866 | int tocopy; | |
2867 | size_t toread; | |
2868 | struct buffer_head *bh; | |
2869 | loff_t i_size = i_size_read(inode); | |
2870 | ||
2871 | if (off > i_size) | |
2872 | return 0; | |
2873 | if (off+len > i_size) | |
2874 | len = i_size-off; | |
2875 | toread = len; | |
2876 | while (toread > 0) { | |
2877 | tocopy = sb->s_blocksize - offset < toread ? | |
2878 | sb->s_blocksize - offset : toread; | |
2879 | bh = ext3_bread(NULL, inode, blk, 0, &err); | |
2880 | if (err) | |
2881 | return err; | |
2882 | if (!bh) /* A hole? */ | |
2883 | memset(data, 0, tocopy); | |
2884 | else | |
2885 | memcpy(data, bh->b_data+offset, tocopy); | |
2886 | brelse(bh); | |
2887 | offset = 0; | |
2888 | toread -= tocopy; | |
2889 | data += tocopy; | |
2890 | blk++; | |
2891 | } | |
2892 | return len; | |
2893 | } | |
2894 | ||
2895 | /* Write to quotafile (we know the transaction is already started and has | |
2896 | * enough credits) */ | |
2897 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
2898 | const char *data, size_t len, loff_t off) | |
2899 | { | |
2900 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2901 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2902 | int err = 0; | |
2903 | int offset = off & (sb->s_blocksize - 1); | |
2904 | int tocopy; | |
2905 | int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL; | |
2906 | size_t towrite = len; | |
2907 | struct buffer_head *bh; | |
2908 | handle_t *handle = journal_current_handle(); | |
2909 | ||
9c3013e9 JK |
2910 | if (!handle) { |
2911 | printk(KERN_WARNING "EXT3-fs: Quota write (off=%Lu, len=%Lu)" | |
2912 | " cancelled because transaction is not started.\n", | |
2913 | (unsigned long long)off, (unsigned long long)len); | |
2914 | return -EIO; | |
2915 | } | |
5c81a419 | 2916 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
1da177e4 LT |
2917 | while (towrite > 0) { |
2918 | tocopy = sb->s_blocksize - offset < towrite ? | |
2919 | sb->s_blocksize - offset : towrite; | |
2920 | bh = ext3_bread(handle, inode, blk, 1, &err); | |
2921 | if (!bh) | |
2922 | goto out; | |
2923 | if (journal_quota) { | |
2924 | err = ext3_journal_get_write_access(handle, bh); | |
2925 | if (err) { | |
2926 | brelse(bh); | |
2927 | goto out; | |
2928 | } | |
2929 | } | |
2930 | lock_buffer(bh); | |
2931 | memcpy(bh->b_data+offset, data, tocopy); | |
2932 | flush_dcache_page(bh->b_page); | |
2933 | unlock_buffer(bh); | |
2934 | if (journal_quota) | |
2935 | err = ext3_journal_dirty_metadata(handle, bh); | |
2936 | else { | |
2937 | /* Always do at least ordered writes for quotas */ | |
2938 | err = ext3_journal_dirty_data(handle, bh); | |
2939 | mark_buffer_dirty(bh); | |
2940 | } | |
2941 | brelse(bh); | |
2942 | if (err) | |
2943 | goto out; | |
2944 | offset = 0; | |
2945 | towrite -= tocopy; | |
2946 | data += tocopy; | |
2947 | blk++; | |
2948 | } | |
2949 | out: | |
f5c8f7da JK |
2950 | if (len == towrite) { |
2951 | mutex_unlock(&inode->i_mutex); | |
1da177e4 | 2952 | return err; |
f5c8f7da | 2953 | } |
1da177e4 LT |
2954 | if (inode->i_size < off+len-towrite) { |
2955 | i_size_write(inode, off+len-towrite); | |
2956 | EXT3_I(inode)->i_disksize = inode->i_size; | |
2957 | } | |
2958 | inode->i_version++; | |
2959 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2960 | ext3_mark_inode_dirty(handle, inode); | |
1b1dcc1b | 2961 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
2962 | return len - towrite; |
2963 | } | |
2964 | ||
2965 | #endif | |
2966 | ||
454e2398 DH |
2967 | static int ext3_get_sb(struct file_system_type *fs_type, |
2968 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 2969 | { |
454e2398 | 2970 | return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt); |
1da177e4 LT |
2971 | } |
2972 | ||
2973 | static struct file_system_type ext3_fs_type = { | |
2974 | .owner = THIS_MODULE, | |
2975 | .name = "ext3", | |
2976 | .get_sb = ext3_get_sb, | |
2977 | .kill_sb = kill_block_super, | |
2978 | .fs_flags = FS_REQUIRES_DEV, | |
2979 | }; | |
2980 | ||
2981 | static int __init init_ext3_fs(void) | |
2982 | { | |
2983 | int err = init_ext3_xattr(); | |
2984 | if (err) | |
2985 | return err; | |
2986 | err = init_inodecache(); | |
2987 | if (err) | |
2988 | goto out1; | |
2989 | err = register_filesystem(&ext3_fs_type); | |
2990 | if (err) | |
2991 | goto out; | |
2992 | return 0; | |
2993 | out: | |
2994 | destroy_inodecache(); | |
2995 | out1: | |
e9ad5620 | 2996 | exit_ext3_xattr(); |
1da177e4 LT |
2997 | return err; |
2998 | } | |
2999 | ||
3000 | static void __exit exit_ext3_fs(void) | |
3001 | { | |
3002 | unregister_filesystem(&ext3_fs_type); | |
3003 | destroy_inodecache(); | |
3004 | exit_ext3_xattr(); | |
3005 | } | |
3006 | ||
3007 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
3008 | MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions"); | |
3009 | MODULE_LICENSE("GPL"); | |
3010 | module_init(init_ext3_fs) | |
3011 | module_exit(exit_ext3_fs) |