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; | |
fe8bc91c JK |
469 | atomic_set(&ei->i_datasync_tid, 0); |
470 | atomic_set(&ei->i_sync_tid, 0); | |
1da177e4 LT |
471 | return &ei->vfs_inode; |
472 | } | |
473 | ||
474 | static void ext3_destroy_inode(struct inode *inode) | |
475 | { | |
9f7dd93d VA |
476 | if (!list_empty(&(EXT3_I(inode)->i_orphan))) { |
477 | printk("EXT3 Inode %p: orphan list check failed!\n", | |
478 | EXT3_I(inode)); | |
479 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
480 | EXT3_I(inode), sizeof(struct ext3_inode_info), | |
481 | false); | |
482 | dump_stack(); | |
483 | } | |
1da177e4 LT |
484 | kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); |
485 | } | |
486 | ||
51cc5068 | 487 | static void init_once(void *foo) |
1da177e4 LT |
488 | { |
489 | struct ext3_inode_info *ei = (struct ext3_inode_info *) foo; | |
490 | ||
a35afb83 | 491 | INIT_LIST_HEAD(&ei->i_orphan); |
1da177e4 | 492 | #ifdef CONFIG_EXT3_FS_XATTR |
a35afb83 | 493 | init_rwsem(&ei->xattr_sem); |
1da177e4 | 494 | #endif |
a35afb83 CL |
495 | mutex_init(&ei->truncate_mutex); |
496 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 497 | } |
ae6ddcc5 | 498 | |
1da177e4 LT |
499 | static int init_inodecache(void) |
500 | { | |
501 | ext3_inode_cachep = kmem_cache_create("ext3_inode_cache", | |
502 | sizeof(struct ext3_inode_info), | |
fffb60f9 PJ |
503 | 0, (SLAB_RECLAIM_ACCOUNT| |
504 | SLAB_MEM_SPREAD), | |
20c2df83 | 505 | init_once); |
1da177e4 LT |
506 | if (ext3_inode_cachep == NULL) |
507 | return -ENOMEM; | |
508 | return 0; | |
509 | } | |
510 | ||
511 | static void destroy_inodecache(void) | |
512 | { | |
1a1d92c1 | 513 | kmem_cache_destroy(ext3_inode_cachep); |
1da177e4 LT |
514 | } |
515 | ||
516 | static void ext3_clear_inode(struct inode *inode) | |
517 | { | |
518 | struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info; | |
1da177e4 LT |
519 | ext3_discard_reservation(inode); |
520 | EXT3_I(inode)->i_block_alloc_info = NULL; | |
e6022603 AM |
521 | if (unlikely(rsv)) |
522 | kfree(rsv); | |
1da177e4 LT |
523 | } |
524 | ||
6cd37cda | 525 | static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) |
8fc2751b | 526 | { |
6cd37cda | 527 | #if defined(CONFIG_QUOTA) |
275abf5b | 528 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
8fc2751b | 529 | |
8fc2751b MB |
530 | if (sbi->s_jquota_fmt) |
531 | seq_printf(seq, ",jqfmt=%s", | |
532 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); | |
533 | ||
534 | if (sbi->s_qf_names[USRQUOTA]) | |
535 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
536 | ||
537 | if (sbi->s_qf_names[GRPQUOTA]) | |
538 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
539 | ||
540 | if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) | |
541 | seq_puts(seq, ",usrquota"); | |
542 | ||
543 | if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) | |
544 | seq_puts(seq, ",grpquota"); | |
545 | #endif | |
6cd37cda PO |
546 | } |
547 | ||
3c4cec65 JK |
548 | static char *data_mode_string(unsigned long mode) |
549 | { | |
550 | switch (mode) { | |
551 | case EXT3_MOUNT_JOURNAL_DATA: | |
552 | return "journal"; | |
553 | case EXT3_MOUNT_ORDERED_DATA: | |
554 | return "ordered"; | |
555 | case EXT3_MOUNT_WRITEBACK_DATA: | |
556 | return "writeback"; | |
557 | } | |
558 | return "unknown"; | |
559 | } | |
560 | ||
571beed8 MS |
561 | /* |
562 | * Show an option if | |
563 | * - it's set to a non-default value OR | |
564 | * - if the per-sb default is different from the global default | |
565 | */ | |
6cd37cda PO |
566 | static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) |
567 | { | |
568 | struct super_block *sb = vfs->mnt_sb; | |
571beed8 MS |
569 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
570 | struct ext3_super_block *es = sbi->s_es; | |
571 | unsigned long def_mount_opts; | |
572 | ||
573 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
574 | ||
575 | if (sbi->s_sb_block != 1) | |
576 | seq_printf(seq, ",sb=%lu", sbi->s_sb_block); | |
577 | if (test_opt(sb, MINIX_DF)) | |
578 | seq_puts(seq, ",minixdf"); | |
579 | if (test_opt(sb, GRPID)) | |
580 | seq_puts(seq, ",grpid"); | |
581 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS)) | |
582 | seq_puts(seq, ",nogrpid"); | |
583 | if (sbi->s_resuid != EXT3_DEF_RESUID || | |
584 | le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) { | |
585 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
586 | } | |
587 | if (sbi->s_resgid != EXT3_DEF_RESGID || | |
588 | le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) { | |
589 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
590 | } | |
1eca93f9 | 591 | if (test_opt(sb, ERRORS_RO)) { |
571beed8 MS |
592 | int def_errors = le16_to_cpu(es->s_errors); |
593 | ||
594 | if (def_errors == EXT3_ERRORS_PANIC || | |
1eca93f9 AK |
595 | def_errors == EXT3_ERRORS_CONTINUE) { |
596 | seq_puts(seq, ",errors=remount-ro"); | |
571beed8 MS |
597 | } |
598 | } | |
1eca93f9 AK |
599 | if (test_opt(sb, ERRORS_CONT)) |
600 | seq_puts(seq, ",errors=continue"); | |
571beed8 MS |
601 | if (test_opt(sb, ERRORS_PANIC)) |
602 | seq_puts(seq, ",errors=panic"); | |
603 | if (test_opt(sb, NO_UID32)) | |
604 | seq_puts(seq, ",nouid32"); | |
605 | if (test_opt(sb, DEBUG)) | |
606 | seq_puts(seq, ",debug"); | |
607 | if (test_opt(sb, OLDALLOC)) | |
608 | seq_puts(seq, ",oldalloc"); | |
609 | #ifdef CONFIG_EXT3_FS_XATTR | |
610 | if (test_opt(sb, XATTR_USER)) | |
611 | seq_puts(seq, ",user_xattr"); | |
612 | if (!test_opt(sb, XATTR_USER) && | |
613 | (def_mount_opts & EXT3_DEFM_XATTR_USER)) { | |
614 | seq_puts(seq, ",nouser_xattr"); | |
615 | } | |
616 | #endif | |
617 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
618 | if (test_opt(sb, POSIX_ACL)) | |
619 | seq_puts(seq, ",acl"); | |
620 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL)) | |
621 | seq_puts(seq, ",noacl"); | |
622 | #endif | |
623 | if (!test_opt(sb, RESERVATION)) | |
624 | seq_puts(seq, ",noreservation"); | |
625 | if (sbi->s_commit_interval) { | |
626 | seq_printf(seq, ",commit=%u", | |
627 | (unsigned) (sbi->s_commit_interval / HZ)); | |
628 | } | |
629 | if (test_opt(sb, BARRIER)) | |
630 | seq_puts(seq, ",barrier=1"); | |
631 | if (test_opt(sb, NOBH)) | |
632 | seq_puts(seq, ",nobh"); | |
6cd37cda | 633 | |
3c4cec65 JK |
634 | seq_printf(seq, ",data=%s", data_mode_string(sbi->s_mount_opt & |
635 | EXT3_MOUNT_DATA_FLAGS)); | |
0e4fb5e2 HK |
636 | if (test_opt(sb, DATA_ERR_ABORT)) |
637 | seq_puts(seq, ",data_err=abort"); | |
638 | ||
6cd37cda | 639 | ext3_show_quota_options(seq, sb); |
8fc2751b MB |
640 | |
641 | return 0; | |
642 | } | |
1da177e4 | 643 | |
fdb36673 | 644 | |
74af0baa CH |
645 | static struct inode *ext3_nfs_get_inode(struct super_block *sb, |
646 | u64 ino, u32 generation) | |
fdb36673 | 647 | { |
fdb36673 | 648 | struct inode *inode; |
fdb36673 N |
649 | |
650 | if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO) | |
651 | return ERR_PTR(-ESTALE); | |
652 | if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) | |
653 | return ERR_PTR(-ESTALE); | |
654 | ||
655 | /* iget isn't really right if the inode is currently unallocated!! | |
656 | * | |
657 | * ext3_read_inode will return a bad_inode if the inode had been | |
658 | * deleted, so we should be safe. | |
659 | * | |
660 | * Currently we don't know the generation for parent directory, so | |
661 | * a generation of 0 means "accept any" | |
662 | */ | |
473043dc DH |
663 | inode = ext3_iget(sb, ino); |
664 | if (IS_ERR(inode)) | |
665 | return ERR_CAST(inode); | |
666 | if (generation && inode->i_generation != generation) { | |
fdb36673 N |
667 | iput(inode); |
668 | return ERR_PTR(-ESTALE); | |
669 | } | |
74af0baa CH |
670 | |
671 | return inode; | |
672 | } | |
673 | ||
674 | static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
675 | int fh_len, int fh_type) | |
676 | { | |
677 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
678 | ext3_nfs_get_inode); | |
679 | } | |
680 | ||
681 | static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid, | |
682 | int fh_len, int fh_type) | |
683 | { | |
684 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
685 | ext3_nfs_get_inode); | |
fdb36673 N |
686 | } |
687 | ||
6b082b53 TO |
688 | /* |
689 | * Try to release metadata pages (indirect blocks, directories) which are | |
690 | * mapped via the block device. Since these pages could have journal heads | |
691 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
692 | * jbd layer's try_to_free_buffers() function to release them. | |
693 | */ | |
694 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, | |
695 | gfp_t wait) | |
696 | { | |
697 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
698 | ||
699 | WARN_ON(PageChecked(page)); | |
700 | if (!page_has_buffers(page)) | |
701 | return 0; | |
702 | if (journal) | |
703 | return journal_try_to_free_buffers(journal, page, | |
704 | wait & ~__GFP_WAIT); | |
705 | return try_to_free_buffers(page); | |
706 | } | |
707 | ||
8fc2751b | 708 | #ifdef CONFIG_QUOTA |
1da177e4 LT |
709 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
710 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) | |
711 | ||
1da177e4 LT |
712 | static int ext3_write_dquot(struct dquot *dquot); |
713 | static int ext3_acquire_dquot(struct dquot *dquot); | |
714 | static int ext3_release_dquot(struct dquot *dquot); | |
715 | static int ext3_mark_dquot_dirty(struct dquot *dquot); | |
716 | static int ext3_write_info(struct super_block *sb, int type); | |
2fd83a4f JK |
717 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, |
718 | char *path, int remount); | |
1da177e4 LT |
719 | static int ext3_quota_on_mount(struct super_block *sb, int type); |
720 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
721 | size_t len, loff_t off); | |
722 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
723 | const char *data, size_t len, loff_t off); | |
724 | ||
61e225dc | 725 | static const struct dquot_operations ext3_quota_operations = { |
a219ce37 JK |
726 | .initialize = dquot_initialize, |
727 | .drop = dquot_drop, | |
1da177e4 LT |
728 | .alloc_space = dquot_alloc_space, |
729 | .alloc_inode = dquot_alloc_inode, | |
730 | .free_space = dquot_free_space, | |
731 | .free_inode = dquot_free_inode, | |
732 | .transfer = dquot_transfer, | |
733 | .write_dquot = ext3_write_dquot, | |
734 | .acquire_dquot = ext3_acquire_dquot, | |
735 | .release_dquot = ext3_release_dquot, | |
736 | .mark_dirty = ext3_mark_dquot_dirty, | |
157091a2 JK |
737 | .write_info = ext3_write_info, |
738 | .alloc_dquot = dquot_alloc, | |
739 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
740 | }; |
741 | ||
0d54b217 | 742 | static const struct quotactl_ops ext3_qctl_operations = { |
1da177e4 LT |
743 | .quota_on = ext3_quota_on, |
744 | .quota_off = vfs_quota_off, | |
745 | .quota_sync = vfs_quota_sync, | |
746 | .get_info = vfs_get_dqinfo, | |
747 | .set_info = vfs_set_dqinfo, | |
748 | .get_dqblk = vfs_get_dqblk, | |
749 | .set_dqblk = vfs_set_dqblk | |
750 | }; | |
751 | #endif | |
752 | ||
ee9b6d61 | 753 | static const struct super_operations ext3_sops = { |
1da177e4 LT |
754 | .alloc_inode = ext3_alloc_inode, |
755 | .destroy_inode = ext3_destroy_inode, | |
1da177e4 LT |
756 | .write_inode = ext3_write_inode, |
757 | .dirty_inode = ext3_dirty_inode, | |
758 | .delete_inode = ext3_delete_inode, | |
759 | .put_super = ext3_put_super, | |
1da177e4 | 760 | .sync_fs = ext3_sync_fs, |
c4be0c1d TS |
761 | .freeze_fs = ext3_freeze, |
762 | .unfreeze_fs = ext3_unfreeze, | |
1da177e4 LT |
763 | .statfs = ext3_statfs, |
764 | .remount_fs = ext3_remount, | |
765 | .clear_inode = ext3_clear_inode, | |
8fc2751b | 766 | .show_options = ext3_show_options, |
1da177e4 LT |
767 | #ifdef CONFIG_QUOTA |
768 | .quota_read = ext3_quota_read, | |
769 | .quota_write = ext3_quota_write, | |
770 | #endif | |
6b082b53 | 771 | .bdev_try_to_free_page = bdev_try_to_free_page, |
1da177e4 LT |
772 | }; |
773 | ||
39655164 | 774 | static const struct export_operations ext3_export_ops = { |
74af0baa CH |
775 | .fh_to_dentry = ext3_fh_to_dentry, |
776 | .fh_to_parent = ext3_fh_to_parent, | |
1da177e4 LT |
777 | .get_parent = ext3_get_parent, |
778 | }; | |
779 | ||
780 | enum { | |
781 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
782 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
2860b733 | 783 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, |
1da177e4 | 784 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
ade1a29e | 785 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, |
71b96257 | 786 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, |
1da177e4 | 787 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
0e4fb5e2 | 788 | Opt_data_err_abort, Opt_data_err_ignore, |
1da177e4 | 789 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1f54587b | 790 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, |
8fc2751b MB |
791 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, |
792 | Opt_grpquota | |
1da177e4 LT |
793 | }; |
794 | ||
a447c093 | 795 | static const match_table_t tokens = { |
1da177e4 LT |
796 | {Opt_bsd_df, "bsddf"}, |
797 | {Opt_minix_df, "minixdf"}, | |
798 | {Opt_grpid, "grpid"}, | |
799 | {Opt_grpid, "bsdgroups"}, | |
800 | {Opt_nogrpid, "nogrpid"}, | |
801 | {Opt_nogrpid, "sysvgroups"}, | |
802 | {Opt_resgid, "resgid=%u"}, | |
803 | {Opt_resuid, "resuid=%u"}, | |
804 | {Opt_sb, "sb=%u"}, | |
805 | {Opt_err_cont, "errors=continue"}, | |
806 | {Opt_err_panic, "errors=panic"}, | |
807 | {Opt_err_ro, "errors=remount-ro"}, | |
808 | {Opt_nouid32, "nouid32"}, | |
809 | {Opt_nocheck, "nocheck"}, | |
810 | {Opt_nocheck, "check=none"}, | |
1da177e4 LT |
811 | {Opt_debug, "debug"}, |
812 | {Opt_oldalloc, "oldalloc"}, | |
813 | {Opt_orlov, "orlov"}, | |
814 | {Opt_user_xattr, "user_xattr"}, | |
815 | {Opt_nouser_xattr, "nouser_xattr"}, | |
816 | {Opt_acl, "acl"}, | |
817 | {Opt_noacl, "noacl"}, | |
818 | {Opt_reservation, "reservation"}, | |
819 | {Opt_noreservation, "noreservation"}, | |
820 | {Opt_noload, "noload"}, | |
821 | {Opt_nobh, "nobh"}, | |
ade1a29e | 822 | {Opt_bh, "bh"}, |
1da177e4 LT |
823 | {Opt_commit, "commit=%u"}, |
824 | {Opt_journal_update, "journal=update"}, | |
825 | {Opt_journal_inum, "journal=%u"}, | |
71b96257 | 826 | {Opt_journal_dev, "journal_dev=%u"}, |
1da177e4 LT |
827 | {Opt_abort, "abort"}, |
828 | {Opt_data_journal, "data=journal"}, | |
829 | {Opt_data_ordered, "data=ordered"}, | |
830 | {Opt_data_writeback, "data=writeback"}, | |
0e4fb5e2 HK |
831 | {Opt_data_err_abort, "data_err=abort"}, |
832 | {Opt_data_err_ignore, "data_err=ignore"}, | |
1da177e4 LT |
833 | {Opt_offusrjquota, "usrjquota="}, |
834 | {Opt_usrjquota, "usrjquota=%s"}, | |
835 | {Opt_offgrpjquota, "grpjquota="}, | |
836 | {Opt_grpjquota, "grpjquota=%s"}, | |
837 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
838 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
8fc2751b | 839 | {Opt_grpquota, "grpquota"}, |
1f54587b JK |
840 | {Opt_noquota, "noquota"}, |
841 | {Opt_quota, "quota"}, | |
8fc2751b | 842 | {Opt_usrquota, "usrquota"}, |
1da177e4 | 843 | {Opt_barrier, "barrier=%u"}, |
1da177e4 | 844 | {Opt_resize, "resize"}, |
92587216 | 845 | {Opt_err, NULL}, |
1da177e4 LT |
846 | }; |
847 | ||
43d23f90 | 848 | static ext3_fsblk_t get_sb_block(void **data) |
1da177e4 | 849 | { |
e9ad5620 DK |
850 | ext3_fsblk_t sb_block; |
851 | char *options = (char *) *data; | |
1da177e4 LT |
852 | |
853 | if (!options || strncmp(options, "sb=", 3) != 0) | |
854 | return 1; /* Default location */ | |
855 | options += 3; | |
43d23f90 | 856 | /*todo: use simple_strtoll with >32bit ext3 */ |
1da177e4 LT |
857 | sb_block = simple_strtoul(options, &options, 0); |
858 | if (*options && *options != ',') { | |
859 | printk("EXT3-fs: Invalid sb specification: %s\n", | |
860 | (char *) *data); | |
861 | return 1; | |
862 | } | |
863 | if (*options == ',') | |
864 | options++; | |
865 | *data = (void *) options; | |
866 | return sb_block; | |
867 | } | |
868 | ||
71b96257 | 869 | static int parse_options (char *options, struct super_block *sb, |
eee194e7 | 870 | unsigned int *inum, unsigned long *journal_devnum, |
43d23f90 | 871 | ext3_fsblk_t *n_blocks_count, int is_remount) |
1da177e4 LT |
872 | { |
873 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
874 | char * p; | |
875 | substring_t args[MAX_OPT_ARGS]; | |
876 | int data_opt = 0; | |
877 | int option; | |
878 | #ifdef CONFIG_QUOTA | |
d06bf1d2 | 879 | int qtype, qfmt; |
1da177e4 LT |
880 | char *qname; |
881 | #endif | |
882 | ||
883 | if (!options) | |
884 | return 1; | |
885 | ||
886 | while ((p = strsep (&options, ",")) != NULL) { | |
887 | int token; | |
888 | if (!*p) | |
889 | continue; | |
890 | ||
891 | token = match_token(p, tokens, args); | |
892 | switch (token) { | |
893 | case Opt_bsd_df: | |
894 | clear_opt (sbi->s_mount_opt, MINIX_DF); | |
895 | break; | |
896 | case Opt_minix_df: | |
897 | set_opt (sbi->s_mount_opt, MINIX_DF); | |
898 | break; | |
899 | case Opt_grpid: | |
900 | set_opt (sbi->s_mount_opt, GRPID); | |
901 | break; | |
902 | case Opt_nogrpid: | |
903 | clear_opt (sbi->s_mount_opt, GRPID); | |
904 | break; | |
905 | case Opt_resuid: | |
906 | if (match_int(&args[0], &option)) | |
907 | return 0; | |
908 | sbi->s_resuid = option; | |
909 | break; | |
910 | case Opt_resgid: | |
911 | if (match_int(&args[0], &option)) | |
912 | return 0; | |
913 | sbi->s_resgid = option; | |
914 | break; | |
915 | case Opt_sb: | |
916 | /* handled by get_sb_block() instead of here */ | |
917 | /* *sb_block = match_int(&args[0]); */ | |
918 | break; | |
919 | case Opt_err_panic: | |
920 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
921 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
922 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
923 | break; | |
924 | case Opt_err_ro: | |
925 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
926 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
927 | set_opt (sbi->s_mount_opt, ERRORS_RO); | |
928 | break; | |
929 | case Opt_err_cont: | |
930 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
931 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
932 | set_opt (sbi->s_mount_opt, ERRORS_CONT); | |
933 | break; | |
934 | case Opt_nouid32: | |
935 | set_opt (sbi->s_mount_opt, NO_UID32); | |
936 | break; | |
1da177e4 LT |
937 | case Opt_nocheck: |
938 | clear_opt (sbi->s_mount_opt, CHECK); | |
939 | break; | |
940 | case Opt_debug: | |
941 | set_opt (sbi->s_mount_opt, DEBUG); | |
942 | break; | |
943 | case Opt_oldalloc: | |
944 | set_opt (sbi->s_mount_opt, OLDALLOC); | |
945 | break; | |
946 | case Opt_orlov: | |
947 | clear_opt (sbi->s_mount_opt, OLDALLOC); | |
948 | break; | |
949 | #ifdef CONFIG_EXT3_FS_XATTR | |
950 | case Opt_user_xattr: | |
951 | set_opt (sbi->s_mount_opt, XATTR_USER); | |
952 | break; | |
953 | case Opt_nouser_xattr: | |
954 | clear_opt (sbi->s_mount_opt, XATTR_USER); | |
955 | break; | |
956 | #else | |
957 | case Opt_user_xattr: | |
958 | case Opt_nouser_xattr: | |
959 | printk("EXT3 (no)user_xattr options not supported\n"); | |
960 | break; | |
961 | #endif | |
962 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
963 | case Opt_acl: | |
964 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
965 | break; | |
966 | case Opt_noacl: | |
967 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
968 | break; | |
969 | #else | |
970 | case Opt_acl: | |
971 | case Opt_noacl: | |
972 | printk("EXT3 (no)acl options not supported\n"); | |
973 | break; | |
974 | #endif | |
975 | case Opt_reservation: | |
976 | set_opt(sbi->s_mount_opt, RESERVATION); | |
977 | break; | |
978 | case Opt_noreservation: | |
979 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
980 | break; | |
981 | case Opt_journal_update: | |
982 | /* @@@ FIXME */ | |
983 | /* Eventually we will want to be able to create | |
984 | a journal file here. For now, only allow the | |
985 | user to specify an existing inode to be the | |
986 | journal file. */ | |
987 | if (is_remount) { | |
988 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
989 | "journal on remount\n"); | |
990 | return 0; | |
991 | } | |
992 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); | |
993 | break; | |
994 | case Opt_journal_inum: | |
995 | if (is_remount) { | |
996 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
997 | "journal on remount\n"); | |
998 | return 0; | |
999 | } | |
1000 | if (match_int(&args[0], &option)) | |
1001 | return 0; | |
1002 | *inum = option; | |
1003 | break; | |
71b96257 JL |
1004 | case Opt_journal_dev: |
1005 | if (is_remount) { | |
1006 | printk(KERN_ERR "EXT3-fs: cannot specify " | |
1007 | "journal on remount\n"); | |
1008 | return 0; | |
1009 | } | |
1010 | if (match_int(&args[0], &option)) | |
1011 | return 0; | |
1012 | *journal_devnum = option; | |
1013 | break; | |
1da177e4 LT |
1014 | case Opt_noload: |
1015 | set_opt (sbi->s_mount_opt, NOLOAD); | |
1016 | break; | |
1017 | case Opt_commit: | |
1018 | if (match_int(&args[0], &option)) | |
1019 | return 0; | |
1020 | if (option < 0) | |
1021 | return 0; | |
1022 | if (option == 0) | |
1023 | option = JBD_DEFAULT_MAX_COMMIT_AGE; | |
1024 | sbi->s_commit_interval = HZ * option; | |
1025 | break; | |
1026 | case Opt_data_journal: | |
1027 | data_opt = EXT3_MOUNT_JOURNAL_DATA; | |
1028 | goto datacheck; | |
1029 | case Opt_data_ordered: | |
1030 | data_opt = EXT3_MOUNT_ORDERED_DATA; | |
1031 | goto datacheck; | |
1032 | case Opt_data_writeback: | |
1033 | data_opt = EXT3_MOUNT_WRITEBACK_DATA; | |
1034 | datacheck: | |
1035 | if (is_remount) { | |
1036 | if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS) | |
3c4cec65 JK |
1037 | == data_opt) |
1038 | break; | |
1039 | printk(KERN_ERR | |
1040 | "EXT3-fs (device %s): Cannot change " | |
1041 | "data mode on remount. The filesystem " | |
1042 | "is mounted in data=%s mode and you " | |
1043 | "try to remount it in data=%s mode.\n", | |
1044 | sb->s_id, | |
1045 | data_mode_string(sbi->s_mount_opt & | |
1046 | EXT3_MOUNT_DATA_FLAGS), | |
1047 | data_mode_string(data_opt)); | |
1048 | return 0; | |
1da177e4 LT |
1049 | } else { |
1050 | sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS; | |
1051 | sbi->s_mount_opt |= data_opt; | |
1052 | } | |
1053 | break; | |
0e4fb5e2 HK |
1054 | case Opt_data_err_abort: |
1055 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1056 | break; | |
1057 | case Opt_data_err_ignore: | |
1058 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1059 | break; | |
1da177e4 LT |
1060 | #ifdef CONFIG_QUOTA |
1061 | case Opt_usrjquota: | |
1062 | qtype = USRQUOTA; | |
1063 | goto set_qf_name; | |
1064 | case Opt_grpjquota: | |
1065 | qtype = GRPQUOTA; | |
1066 | set_qf_name: | |
ee0d5ffe | 1067 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 | 1068 | !sbi->s_qf_names[qtype]) { |
1da177e4 | 1069 | printk(KERN_ERR |
99aeaf63 | 1070 | "EXT3-fs: Cannot change journaled " |
1da177e4 LT |
1071 | "quota options when quota turned on.\n"); |
1072 | return 0; | |
1073 | } | |
1074 | qname = match_strdup(&args[0]); | |
1075 | if (!qname) { | |
1076 | printk(KERN_ERR | |
1077 | "EXT3-fs: not enough memory for " | |
1078 | "storing quotafile name.\n"); | |
1079 | return 0; | |
1080 | } | |
1081 | if (sbi->s_qf_names[qtype] && | |
1082 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1083 | printk(KERN_ERR | |
1084 | "EXT3-fs: %s quota file already " | |
1085 | "specified.\n", QTYPE2NAME(qtype)); | |
1086 | kfree(qname); | |
1087 | return 0; | |
1088 | } | |
1089 | sbi->s_qf_names[qtype] = qname; | |
1090 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1091 | printk(KERN_ERR | |
1092 | "EXT3-fs: quotafile must be on " | |
1093 | "filesystem root.\n"); | |
1094 | kfree(sbi->s_qf_names[qtype]); | |
1095 | sbi->s_qf_names[qtype] = NULL; | |
1096 | return 0; | |
1097 | } | |
1f54587b | 1098 | set_opt(sbi->s_mount_opt, QUOTA); |
1da177e4 LT |
1099 | break; |
1100 | case Opt_offusrjquota: | |
1101 | qtype = USRQUOTA; | |
1102 | goto clear_qf_name; | |
1103 | case Opt_offgrpjquota: | |
1104 | qtype = GRPQUOTA; | |
1105 | clear_qf_name: | |
ee0d5ffe | 1106 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 | 1107 | sbi->s_qf_names[qtype]) { |
1da177e4 | 1108 | printk(KERN_ERR "EXT3-fs: Cannot change " |
99aeaf63 | 1109 | "journaled quota options when " |
1da177e4 LT |
1110 | "quota turned on.\n"); |
1111 | return 0; | |
1112 | } | |
08c6a96f JK |
1113 | /* |
1114 | * The space will be released later when all options | |
1115 | * are confirmed to be correct | |
1116 | */ | |
1da177e4 LT |
1117 | sbi->s_qf_names[qtype] = NULL; |
1118 | break; | |
1119 | case Opt_jqfmt_vfsold: | |
d06bf1d2 JK |
1120 | qfmt = QFMT_VFS_OLD; |
1121 | goto set_qf_format; | |
1da177e4 | 1122 | case Opt_jqfmt_vfsv0: |
d06bf1d2 JK |
1123 | qfmt = QFMT_VFS_V0; |
1124 | set_qf_format: | |
ee0d5ffe | 1125 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 JK |
1126 | sbi->s_jquota_fmt != qfmt) { |
1127 | printk(KERN_ERR "EXT3-fs: Cannot change " | |
1128 | "journaled quota options when " | |
1129 | "quota turned on.\n"); | |
1130 | return 0; | |
1131 | } | |
1132 | sbi->s_jquota_fmt = qfmt; | |
1da177e4 | 1133 | break; |
1f54587b | 1134 | case Opt_quota: |
8fc2751b MB |
1135 | case Opt_usrquota: |
1136 | set_opt(sbi->s_mount_opt, QUOTA); | |
1137 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1138 | break; | |
1139 | case Opt_grpquota: | |
1f54587b | 1140 | set_opt(sbi->s_mount_opt, QUOTA); |
8fc2751b | 1141 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
1f54587b JK |
1142 | break; |
1143 | case Opt_noquota: | |
ee0d5ffe | 1144 | if (sb_any_quota_loaded(sb)) { |
1f54587b JK |
1145 | printk(KERN_ERR "EXT3-fs: Cannot change quota " |
1146 | "options when quota turned on.\n"); | |
1147 | return 0; | |
1148 | } | |
1149 | clear_opt(sbi->s_mount_opt, QUOTA); | |
8fc2751b MB |
1150 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1151 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1f54587b | 1152 | break; |
1da177e4 | 1153 | #else |
8fc2751b MB |
1154 | case Opt_quota: |
1155 | case Opt_usrquota: | |
1156 | case Opt_grpquota: | |
fa1ff1e0 JK |
1157 | printk(KERN_ERR |
1158 | "EXT3-fs: quota options not supported.\n"); | |
1159 | break; | |
1da177e4 LT |
1160 | case Opt_usrjquota: |
1161 | case Opt_grpjquota: | |
1162 | case Opt_offusrjquota: | |
1163 | case Opt_offgrpjquota: | |
1164 | case Opt_jqfmt_vfsold: | |
1165 | case Opt_jqfmt_vfsv0: | |
1166 | printk(KERN_ERR | |
fa1ff1e0 | 1167 | "EXT3-fs: journaled quota options not " |
1da177e4 LT |
1168 | "supported.\n"); |
1169 | break; | |
1f54587b JK |
1170 | case Opt_noquota: |
1171 | break; | |
1da177e4 LT |
1172 | #endif |
1173 | case Opt_abort: | |
1174 | set_opt(sbi->s_mount_opt, ABORT); | |
1175 | break; | |
1176 | case Opt_barrier: | |
1177 | if (match_int(&args[0], &option)) | |
1178 | return 0; | |
1179 | if (option) | |
1180 | set_opt(sbi->s_mount_opt, BARRIER); | |
1181 | else | |
1182 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1183 | break; | |
1184 | case Opt_ignore: | |
1185 | break; | |
1186 | case Opt_resize: | |
08c6a96f | 1187 | if (!is_remount) { |
1da177e4 LT |
1188 | printk("EXT3-fs: resize option only available " |
1189 | "for remount\n"); | |
1190 | return 0; | |
1191 | } | |
c7f1721e KZ |
1192 | if (match_int(&args[0], &option) != 0) |
1193 | return 0; | |
1da177e4 LT |
1194 | *n_blocks_count = option; |
1195 | break; | |
1196 | case Opt_nobh: | |
1197 | set_opt(sbi->s_mount_opt, NOBH); | |
1198 | break; | |
ade1a29e BP |
1199 | case Opt_bh: |
1200 | clear_opt(sbi->s_mount_opt, NOBH); | |
1201 | break; | |
1da177e4 LT |
1202 | default: |
1203 | printk (KERN_ERR | |
1204 | "EXT3-fs: Unrecognized mount option \"%s\" " | |
1205 | "or missing value\n", p); | |
1206 | return 0; | |
1207 | } | |
1208 | } | |
1209 | #ifdef CONFIG_QUOTA | |
8fc2751b MB |
1210 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
1211 | if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) && | |
1212 | sbi->s_qf_names[USRQUOTA]) | |
1213 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1214 | ||
1215 | if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) && | |
1216 | sbi->s_qf_names[GRPQUOTA]) | |
1217 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1218 | ||
1219 | if ((sbi->s_qf_names[USRQUOTA] && | |
1220 | (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) || | |
1221 | (sbi->s_qf_names[GRPQUOTA] && | |
1222 | (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) { | |
1223 | printk(KERN_ERR "EXT3-fs: old and new quota " | |
1224 | "format mixing.\n"); | |
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | if (!sbi->s_jquota_fmt) { | |
99aeaf63 | 1229 | printk(KERN_ERR "EXT3-fs: journaled quota format " |
8fc2751b MB |
1230 | "not specified.\n"); |
1231 | return 0; | |
1232 | } | |
1233 | } else { | |
1234 | if (sbi->s_jquota_fmt) { | |
99aeaf63 JK |
1235 | printk(KERN_ERR "EXT3-fs: journaled quota format " |
1236 | "specified with no journaling " | |
8fc2751b MB |
1237 | "enabled.\n"); |
1238 | return 0; | |
1239 | } | |
1da177e4 LT |
1240 | } |
1241 | #endif | |
1da177e4 LT |
1242 | return 1; |
1243 | } | |
1244 | ||
1245 | static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es, | |
1246 | int read_only) | |
1247 | { | |
1248 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1249 | int res = 0; | |
1250 | ||
1251 | if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) { | |
1252 | printk (KERN_ERR "EXT3-fs warning: revision level too high, " | |
1253 | "forcing read-only mode\n"); | |
1254 | res = MS_RDONLY; | |
1255 | } | |
1256 | if (read_only) | |
1257 | return res; | |
1258 | if (!(sbi->s_mount_state & EXT3_VALID_FS)) | |
1259 | printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, " | |
1260 | "running e2fsck is recommended\n"); | |
1261 | else if ((sbi->s_mount_state & EXT3_ERROR_FS)) | |
1262 | printk (KERN_WARNING | |
1263 | "EXT3-fs warning: mounting fs with errors, " | |
1264 | "running e2fsck is recommended\n"); | |
1265 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && | |
1266 | le16_to_cpu(es->s_mnt_count) >= | |
1267 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
1268 | printk (KERN_WARNING | |
1269 | "EXT3-fs warning: maximal mount count reached, " | |
1270 | "running e2fsck is recommended\n"); | |
1271 | else if (le32_to_cpu(es->s_checkinterval) && | |
1272 | (le32_to_cpu(es->s_lastcheck) + | |
1273 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
1274 | printk (KERN_WARNING | |
1275 | "EXT3-fs warning: checktime reached, " | |
1276 | "running e2fsck is recommended\n"); | |
1277 | #if 0 | |
1278 | /* @@@ We _will_ want to clear the valid bit if we find | |
1279 | inconsistencies, to force a fsck at reboot. But for | |
1280 | a plain journaled filesystem we can keep it set as | |
1281 | valid forever! :) */ | |
e7f23ebd | 1282 | es->s_state &= cpu_to_le16(~EXT3_VALID_FS); |
1da177e4 LT |
1283 | #endif |
1284 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) | |
1285 | es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT); | |
50e8a289 | 1286 | le16_add_cpu(&es->s_mnt_count, 1); |
1da177e4 LT |
1287 | es->s_mtime = cpu_to_le32(get_seconds()); |
1288 | ext3_update_dynamic_rev(sb); | |
1289 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1290 | ||
1291 | ext3_commit_super(sb, es, 1); | |
1292 | if (test_opt(sb, DEBUG)) | |
1293 | printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, " | |
1294 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", | |
1295 | sb->s_blocksize, | |
1296 | sbi->s_groups_count, | |
1297 | EXT3_BLOCKS_PER_GROUP(sb), | |
1298 | EXT3_INODES_PER_GROUP(sb), | |
1299 | sbi->s_mount_opt); | |
1300 | ||
1301 | printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id); | |
1302 | if (EXT3_SB(sb)->s_journal->j_inode == NULL) { | |
1303 | char b[BDEVNAME_SIZE]; | |
1304 | ||
1305 | printk("external journal on %s\n", | |
1306 | bdevname(EXT3_SB(sb)->s_journal->j_dev, b)); | |
1307 | } else { | |
1308 | printk("internal journal\n"); | |
1309 | } | |
1da177e4 LT |
1310 | return res; |
1311 | } | |
1312 | ||
1313 | /* Called at mount-time, super-block is locked */ | |
197cd65a | 1314 | static int ext3_check_descriptors(struct super_block *sb) |
1da177e4 LT |
1315 | { |
1316 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1da177e4 LT |
1317 | int i; |
1318 | ||
1319 | ext3_debug ("Checking group descriptors"); | |
1320 | ||
197cd65a AM |
1321 | for (i = 0; i < sbi->s_groups_count; i++) { |
1322 | struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL); | |
1eaafeae AM |
1323 | ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i); |
1324 | ext3_fsblk_t last_block; | |
197cd65a | 1325 | |
855565e8 ES |
1326 | if (i == sbi->s_groups_count - 1) |
1327 | last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1; | |
1328 | else | |
1329 | last_block = first_block + | |
1330 | (EXT3_BLOCKS_PER_GROUP(sb) - 1); | |
1331 | ||
855565e8 ES |
1332 | if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || |
1333 | le32_to_cpu(gdp->bg_block_bitmap) > last_block) | |
1da177e4 LT |
1334 | { |
1335 | ext3_error (sb, "ext3_check_descriptors", | |
1336 | "Block bitmap for group %d" | |
1337 | " not in group (block %lu)!", | |
1338 | i, (unsigned long) | |
1339 | le32_to_cpu(gdp->bg_block_bitmap)); | |
1340 | return 0; | |
1341 | } | |
855565e8 ES |
1342 | if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || |
1343 | le32_to_cpu(gdp->bg_inode_bitmap) > last_block) | |
1da177e4 LT |
1344 | { |
1345 | ext3_error (sb, "ext3_check_descriptors", | |
1346 | "Inode bitmap for group %d" | |
1347 | " not in group (block %lu)!", | |
1348 | i, (unsigned long) | |
1349 | le32_to_cpu(gdp->bg_inode_bitmap)); | |
1350 | return 0; | |
1351 | } | |
855565e8 | 1352 | if (le32_to_cpu(gdp->bg_inode_table) < first_block || |
780dcdb2 | 1353 | le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 > |
855565e8 | 1354 | last_block) |
1da177e4 LT |
1355 | { |
1356 | ext3_error (sb, "ext3_check_descriptors", | |
1357 | "Inode table for group %d" | |
1358 | " not in group (block %lu)!", | |
1359 | i, (unsigned long) | |
1360 | le32_to_cpu(gdp->bg_inode_table)); | |
1361 | return 0; | |
1362 | } | |
1da177e4 LT |
1363 | } |
1364 | ||
1365 | sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb)); | |
1366 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb)); | |
1367 | return 1; | |
1368 | } | |
1369 | ||
1370 | ||
1371 | /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at | |
1372 | * the superblock) which were deleted from all directories, but held open by | |
1373 | * a process at the time of a crash. We walk the list and try to delete these | |
1374 | * inodes at recovery time (only with a read-write filesystem). | |
1375 | * | |
1376 | * In order to keep the orphan inode chain consistent during traversal (in | |
1377 | * case of crash during recovery), we link each inode into the superblock | |
1378 | * orphan list_head and handle it the same way as an inode deletion during | |
1379 | * normal operation (which journals the operations for us). | |
1380 | * | |
1381 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1382 | * accidentally point at an in-use or already deleted inode. The worst that | |
1383 | * can happen in this case is that we get a "bit already cleared" message from | |
1384 | * ext3_free_inode(). The only reason we would point at a wrong inode is if | |
1385 | * e2fsck was run on this filesystem, and it must have already done the orphan | |
1386 | * inode cleanup for us, so we can safely abort without any further action. | |
1387 | */ | |
1388 | static void ext3_orphan_cleanup (struct super_block * sb, | |
1389 | struct ext3_super_block * es) | |
1390 | { | |
1391 | unsigned int s_flags = sb->s_flags; | |
1392 | int nr_orphans = 0, nr_truncates = 0; | |
1393 | #ifdef CONFIG_QUOTA | |
1394 | int i; | |
1395 | #endif | |
1396 | if (!es->s_last_orphan) { | |
1397 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1398 | return; | |
1399 | } | |
1400 | ||
a8f48a95 ES |
1401 | if (bdev_read_only(sb->s_bdev)) { |
1402 | printk(KERN_ERR "EXT3-fs: write access " | |
1403 | "unavailable, skipping orphan cleanup.\n"); | |
1404 | return; | |
1405 | } | |
1406 | ||
1da177e4 LT |
1407 | if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { |
1408 | if (es->s_last_orphan) | |
1409 | jbd_debug(1, "Errors on filesystem, " | |
1410 | "clearing orphan list.\n"); | |
1411 | es->s_last_orphan = 0; | |
1412 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1413 | return; | |
1414 | } | |
1415 | ||
1416 | if (s_flags & MS_RDONLY) { | |
1417 | printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n", | |
1418 | sb->s_id); | |
1419 | sb->s_flags &= ~MS_RDONLY; | |
1420 | } | |
1421 | #ifdef CONFIG_QUOTA | |
1422 | /* Needed for iput() to work correctly and not trash data */ | |
1423 | sb->s_flags |= MS_ACTIVE; | |
1424 | /* Turn on quotas so that they are updated correctly */ | |
1425 | for (i = 0; i < MAXQUOTAS; i++) { | |
1426 | if (EXT3_SB(sb)->s_qf_names[i]) { | |
1427 | int ret = ext3_quota_on_mount(sb, i); | |
1428 | if (ret < 0) | |
1429 | printk(KERN_ERR | |
99aeaf63 | 1430 | "EXT3-fs: Cannot turn on journaled " |
1da177e4 LT |
1431 | "quota: error %d\n", ret); |
1432 | } | |
1433 | } | |
1434 | #endif | |
1435 | ||
1436 | while (es->s_last_orphan) { | |
1437 | struct inode *inode; | |
1438 | ||
473043dc DH |
1439 | inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1440 | if (IS_ERR(inode)) { | |
1da177e4 LT |
1441 | es->s_last_orphan = 0; |
1442 | break; | |
1443 | } | |
1444 | ||
1445 | list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan); | |
81a05227 | 1446 | vfs_dq_init(inode); |
1da177e4 LT |
1447 | if (inode->i_nlink) { |
1448 | printk(KERN_DEBUG | |
eee194e7 | 1449 | "%s: truncating inode %lu to %Ld bytes\n", |
e05b6b52 | 1450 | __func__, inode->i_ino, inode->i_size); |
eee194e7 | 1451 | jbd_debug(2, "truncating inode %lu to %Ld bytes\n", |
1da177e4 LT |
1452 | inode->i_ino, inode->i_size); |
1453 | ext3_truncate(inode); | |
1454 | nr_truncates++; | |
1455 | } else { | |
1456 | printk(KERN_DEBUG | |
eee194e7 | 1457 | "%s: deleting unreferenced inode %lu\n", |
e05b6b52 | 1458 | __func__, inode->i_ino); |
eee194e7 | 1459 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1da177e4 LT |
1460 | inode->i_ino); |
1461 | nr_orphans++; | |
1462 | } | |
1463 | iput(inode); /* The delete magic happens here! */ | |
1464 | } | |
1465 | ||
1466 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" | |
1467 | ||
1468 | if (nr_orphans) | |
1469 | printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n", | |
1470 | sb->s_id, PLURAL(nr_orphans)); | |
1471 | if (nr_truncates) | |
1472 | printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n", | |
1473 | sb->s_id, PLURAL(nr_truncates)); | |
1474 | #ifdef CONFIG_QUOTA | |
1475 | /* Turn quotas off */ | |
1476 | for (i = 0; i < MAXQUOTAS; i++) { | |
1477 | if (sb_dqopt(sb)->files[i]) | |
2fd83a4f | 1478 | vfs_quota_off(sb, i, 0); |
1da177e4 LT |
1479 | } |
1480 | #endif | |
1481 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1482 | } | |
1483 | ||
1da177e4 LT |
1484 | /* |
1485 | * Maximal file size. There is a direct, and {,double-,triple-}indirect | |
1486 | * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. | |
1487 | * We need to be 1 filesystem block less than the 2^32 sector limit. | |
1488 | */ | |
1489 | static loff_t ext3_max_size(int bits) | |
1490 | { | |
1491 | loff_t res = EXT3_NDIR_BLOCKS; | |
fe7fdc37 AK |
1492 | int meta_blocks; |
1493 | loff_t upper_limit; | |
1494 | ||
1495 | /* This is calculated to be the largest file size for a | |
1496 | * dense, file such that the total number of | |
1da177e4 | 1497 | * sectors in the file, including data and all indirect blocks, |
fe7fdc37 AK |
1498 | * does not exceed 2^32 -1 |
1499 | * __u32 i_blocks representing the total number of | |
1500 | * 512 bytes blocks of the file | |
1501 | */ | |
1502 | upper_limit = (1LL << 32) - 1; | |
1503 | ||
1504 | /* total blocks in file system block size */ | |
1505 | upper_limit >>= (bits - 9); | |
1506 | ||
1507 | ||
1508 | /* indirect blocks */ | |
1509 | meta_blocks = 1; | |
1510 | /* double indirect blocks */ | |
1511 | meta_blocks += 1 + (1LL << (bits-2)); | |
1512 | /* tripple indirect blocks */ | |
1513 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1514 | ||
1515 | upper_limit -= meta_blocks; | |
1516 | upper_limit <<= bits; | |
1da177e4 LT |
1517 | |
1518 | res += 1LL << (bits-2); | |
1519 | res += 1LL << (2*(bits-2)); | |
1520 | res += 1LL << (3*(bits-2)); | |
1521 | res <<= bits; | |
1522 | if (res > upper_limit) | |
1523 | res = upper_limit; | |
fe7fdc37 AK |
1524 | |
1525 | if (res > MAX_LFS_FILESIZE) | |
1526 | res = MAX_LFS_FILESIZE; | |
1527 | ||
1da177e4 LT |
1528 | return res; |
1529 | } | |
1530 | ||
43d23f90 MC |
1531 | static ext3_fsblk_t descriptor_loc(struct super_block *sb, |
1532 | ext3_fsblk_t logic_sb_block, | |
1da177e4 LT |
1533 | int nr) |
1534 | { | |
1535 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 1536 | unsigned long bg, first_meta_bg; |
1da177e4 LT |
1537 | int has_super = 0; |
1538 | ||
1da177e4 LT |
1539 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
1540 | ||
1541 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) || | |
1542 | nr < first_meta_bg) | |
1543 | return (logic_sb_block + nr + 1); | |
1544 | bg = sbi->s_desc_per_block * nr; | |
1545 | if (ext3_bg_has_super(sb, bg)) | |
1546 | has_super = 1; | |
43d23f90 | 1547 | return (has_super + ext3_group_first_block_no(sb, bg)); |
1da177e4 LT |
1548 | } |
1549 | ||
1550 | ||
1551 | static int ext3_fill_super (struct super_block *sb, void *data, int silent) | |
1552 | { | |
1553 | struct buffer_head * bh; | |
1554 | struct ext3_super_block *es = NULL; | |
1555 | struct ext3_sb_info *sbi; | |
43d23f90 MC |
1556 | ext3_fsblk_t block; |
1557 | ext3_fsblk_t sb_block = get_sb_block(&data); | |
1558 | ext3_fsblk_t logic_sb_block; | |
1da177e4 | 1559 | unsigned long offset = 0; |
eee194e7 | 1560 | unsigned int journal_inum = 0; |
71b96257 | 1561 | unsigned long journal_devnum = 0; |
1da177e4 LT |
1562 | unsigned long def_mount_opts; |
1563 | struct inode *root; | |
1564 | int blocksize; | |
1565 | int hblock; | |
1566 | int db_count; | |
1567 | int i; | |
1568 | int needs_recovery; | |
473043dc | 1569 | int ret = -EINVAL; |
1da177e4 | 1570 | __le32 features; |
833f4077 | 1571 | int err; |
1da177e4 | 1572 | |
f8314dc6 | 1573 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
1574 | if (!sbi) |
1575 | return -ENOMEM; | |
5df096d6 PE |
1576 | |
1577 | sbi->s_blockgroup_lock = | |
1578 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
1579 | if (!sbi->s_blockgroup_lock) { | |
1580 | kfree(sbi); | |
1581 | return -ENOMEM; | |
1582 | } | |
1da177e4 | 1583 | sb->s_fs_info = sbi; |
1da177e4 LT |
1584 | sbi->s_mount_opt = 0; |
1585 | sbi->s_resuid = EXT3_DEF_RESUID; | |
1586 | sbi->s_resgid = EXT3_DEF_RESGID; | |
571beed8 | 1587 | sbi->s_sb_block = sb_block; |
1da177e4 LT |
1588 | |
1589 | unlock_kernel(); | |
1590 | ||
1591 | blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); | |
1592 | if (!blocksize) { | |
1593 | printk(KERN_ERR "EXT3-fs: unable to set blocksize\n"); | |
1594 | goto out_fail; | |
1595 | } | |
1596 | ||
1597 | /* | |
1598 | * The ext3 superblock will not be buffer aligned for other than 1kB | |
1599 | * block sizes. We need to calculate the offset from buffer start. | |
1600 | */ | |
1601 | if (blocksize != EXT3_MIN_BLOCK_SIZE) { | |
1602 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; | |
1603 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1604 | } else { | |
1605 | logic_sb_block = sb_block; | |
1606 | } | |
1607 | ||
1608 | if (!(bh = sb_bread(sb, logic_sb_block))) { | |
1609 | printk (KERN_ERR "EXT3-fs: unable to read superblock\n"); | |
1610 | goto out_fail; | |
1611 | } | |
1612 | /* | |
1613 | * Note: s_es must be initialized as soon as possible because | |
1614 | * some ext3 macro-instructions depend on its value | |
1615 | */ | |
1616 | es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); | |
1617 | sbi->s_es = es; | |
1618 | sb->s_magic = le16_to_cpu(es->s_magic); | |
1619 | if (sb->s_magic != EXT3_SUPER_MAGIC) | |
1620 | goto cantfind_ext3; | |
1621 | ||
1622 | /* Set defaults before we parse the mount options */ | |
1623 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
1624 | if (def_mount_opts & EXT3_DEFM_DEBUG) | |
1625 | set_opt(sbi->s_mount_opt, DEBUG); | |
1626 | if (def_mount_opts & EXT3_DEFM_BSDGROUPS) | |
1627 | set_opt(sbi->s_mount_opt, GRPID); | |
1628 | if (def_mount_opts & EXT3_DEFM_UID16) | |
1629 | set_opt(sbi->s_mount_opt, NO_UID32); | |
2e7842b8 | 1630 | #ifdef CONFIG_EXT3_FS_XATTR |
1da177e4 LT |
1631 | if (def_mount_opts & EXT3_DEFM_XATTR_USER) |
1632 | set_opt(sbi->s_mount_opt, XATTR_USER); | |
2e7842b8 HD |
1633 | #endif |
1634 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1da177e4 LT |
1635 | if (def_mount_opts & EXT3_DEFM_ACL) |
1636 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
2e7842b8 | 1637 | #endif |
1da177e4 LT |
1638 | if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA) |
1639 | sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA; | |
1640 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED) | |
1641 | sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA; | |
1642 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK) | |
1643 | sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA; | |
1644 | ||
1645 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC) | |
1646 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1eca93f9 | 1647 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE) |
2245d7c2 | 1648 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
1eca93f9 AK |
1649 | else |
1650 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
1da177e4 LT |
1651 | |
1652 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
1653 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
1654 | ||
1655 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1656 | ||
71b96257 JL |
1657 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
1658 | NULL, 0)) | |
1da177e4 LT |
1659 | goto failed_mount; |
1660 | ||
1661 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1662 | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); | |
1663 | ||
1664 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV && | |
1665 | (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1666 | EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1667 | EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ae6ddcc5 | 1668 | printk(KERN_WARNING |
1da177e4 LT |
1669 | "EXT3-fs warning: feature flags set on rev 0 fs, " |
1670 | "running e2fsck is recommended\n"); | |
1671 | /* | |
1672 | * Check feature flags regardless of the revision level, since we | |
1673 | * previously didn't change the revision level when setting the flags, | |
1674 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
1675 | */ | |
1676 | features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP); | |
1677 | if (features) { | |
1678 | printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of " | |
1679 | "unsupported optional features (%x).\n", | |
1680 | sb->s_id, le32_to_cpu(features)); | |
1681 | goto failed_mount; | |
1682 | } | |
1683 | features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP); | |
1684 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
1685 | printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of " | |
1686 | "unsupported optional features (%x).\n", | |
1687 | sb->s_id, le32_to_cpu(features)); | |
1688 | goto failed_mount; | |
1689 | } | |
1690 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
1691 | ||
1692 | if (blocksize < EXT3_MIN_BLOCK_SIZE || | |
1693 | blocksize > EXT3_MAX_BLOCK_SIZE) { | |
ae6ddcc5 | 1694 | printk(KERN_ERR |
1da177e4 LT |
1695 | "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n", |
1696 | blocksize, sb->s_id); | |
1697 | goto failed_mount; | |
1698 | } | |
1699 | ||
e1defc4f | 1700 | hblock = bdev_logical_block_size(sb->s_bdev); |
1da177e4 LT |
1701 | if (sb->s_blocksize != blocksize) { |
1702 | /* | |
1703 | * Make sure the blocksize for the filesystem is larger | |
1704 | * than the hardware sectorsize for the machine. | |
1705 | */ | |
1706 | if (blocksize < hblock) { | |
1707 | printk(KERN_ERR "EXT3-fs: blocksize %d too small for " | |
1708 | "device blocksize %d.\n", blocksize, hblock); | |
1709 | goto failed_mount; | |
1710 | } | |
1711 | ||
1712 | brelse (bh); | |
0f0a89eb TS |
1713 | if (!sb_set_blocksize(sb, blocksize)) { |
1714 | printk(KERN_ERR "EXT3-fs: bad blocksize %d.\n", | |
1715 | blocksize); | |
1716 | goto out_fail; | |
1717 | } | |
1da177e4 LT |
1718 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; |
1719 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1720 | bh = sb_bread(sb, logic_sb_block); | |
1721 | if (!bh) { | |
ae6ddcc5 | 1722 | printk(KERN_ERR |
1da177e4 LT |
1723 | "EXT3-fs: Can't read superblock on 2nd try.\n"); |
1724 | goto failed_mount; | |
1725 | } | |
1726 | es = (struct ext3_super_block *)(((char *)bh->b_data) + offset); | |
1727 | sbi->s_es = es; | |
1728 | if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) { | |
ae6ddcc5 | 1729 | printk (KERN_ERR |
1da177e4 LT |
1730 | "EXT3-fs: Magic mismatch, very weird !\n"); |
1731 | goto failed_mount; | |
1732 | } | |
1733 | } | |
1734 | ||
1735 | sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits); | |
1736 | ||
1737 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) { | |
1738 | sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE; | |
1739 | sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO; | |
1740 | } else { | |
1741 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
1742 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
1743 | if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) || | |
3fc74269 | 1744 | (!is_power_of_2(sbi->s_inode_size)) || |
1da177e4 LT |
1745 | (sbi->s_inode_size > blocksize)) { |
1746 | printk (KERN_ERR | |
1747 | "EXT3-fs: unsupported inode size: %d\n", | |
1748 | sbi->s_inode_size); | |
1749 | goto failed_mount; | |
1750 | } | |
1751 | } | |
1752 | sbi->s_frag_size = EXT3_MIN_FRAG_SIZE << | |
1753 | le32_to_cpu(es->s_log_frag_size); | |
1754 | if (blocksize != sbi->s_frag_size) { | |
1755 | printk(KERN_ERR | |
1756 | "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n", | |
1757 | sbi->s_frag_size, blocksize); | |
1758 | goto failed_mount; | |
1759 | } | |
1760 | sbi->s_frags_per_block = 1; | |
1761 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); | |
1762 | sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); | |
1763 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); | |
b47b6f38 | 1764 | if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0) |
1da177e4 LT |
1765 | goto cantfind_ext3; |
1766 | sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb); | |
1767 | if (sbi->s_inodes_per_block == 0) | |
1768 | goto cantfind_ext3; | |
1769 | sbi->s_itb_per_group = sbi->s_inodes_per_group / | |
1770 | sbi->s_inodes_per_block; | |
1771 | sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc); | |
1772 | sbi->s_sbh = bh; | |
1773 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
f0d1b0b3 DH |
1774 | sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb)); |
1775 | sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb)); | |
1da177e4 LT |
1776 | for (i=0; i < 4; i++) |
1777 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
1778 | sbi->s_def_hash_version = es->s_def_hash_version; | |
5e1f8c9e TT |
1779 | i = le32_to_cpu(es->s_flags); |
1780 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
1781 | sbi->s_hash_unsigned = 3; | |
1782 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
1783 | #ifdef __CHAR_UNSIGNED__ | |
1784 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
1785 | sbi->s_hash_unsigned = 3; | |
1786 | #else | |
1787 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
1788 | #endif | |
5e1f8c9e | 1789 | } |
1da177e4 LT |
1790 | |
1791 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
1792 | printk (KERN_ERR | |
1793 | "EXT3-fs: #blocks per group too big: %lu\n", | |
1794 | sbi->s_blocks_per_group); | |
1795 | goto failed_mount; | |
1796 | } | |
1797 | if (sbi->s_frags_per_group > blocksize * 8) { | |
1798 | printk (KERN_ERR | |
1799 | "EXT3-fs: #fragments per group too big: %lu\n", | |
1800 | sbi->s_frags_per_group); | |
1801 | goto failed_mount; | |
1802 | } | |
1803 | if (sbi->s_inodes_per_group > blocksize * 8) { | |
1804 | printk (KERN_ERR | |
1805 | "EXT3-fs: #inodes per group too big: %lu\n", | |
1806 | sbi->s_inodes_per_group); | |
1807 | goto failed_mount; | |
1808 | } | |
1809 | ||
fcd5df35 MC |
1810 | if (le32_to_cpu(es->s_blocks_count) > |
1811 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { | |
1812 | printk(KERN_ERR "EXT3-fs: filesystem on %s:" | |
1813 | " too large to mount safely\n", sb->s_id); | |
1814 | if (sizeof(sector_t) < 8) | |
90c699a9 | 1815 | printk(KERN_WARNING "EXT3-fs: CONFIG_LBDAF not " |
fcd5df35 MC |
1816 | "enabled\n"); |
1817 | goto failed_mount; | |
1818 | } | |
1819 | ||
1da177e4 LT |
1820 | if (EXT3_BLOCKS_PER_GROUP(sb) == 0) |
1821 | goto cantfind_ext3; | |
855565e8 ES |
1822 | sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - |
1823 | le32_to_cpu(es->s_first_data_block) - 1) | |
1824 | / EXT3_BLOCKS_PER_GROUP(sb)) + 1; | |
1da177e4 LT |
1825 | db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) / |
1826 | EXT3_DESC_PER_BLOCK(sb); | |
1827 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), | |
1828 | GFP_KERNEL); | |
1829 | if (sbi->s_group_desc == NULL) { | |
1830 | printk (KERN_ERR "EXT3-fs: not enough memory\n"); | |
1831 | goto failed_mount; | |
1832 | } | |
1833 | ||
5df096d6 | 1834 | bgl_lock_init(sbi->s_blockgroup_lock); |
1da177e4 LT |
1835 | |
1836 | for (i = 0; i < db_count; i++) { | |
1837 | block = descriptor_loc(sb, logic_sb_block, i); | |
1838 | sbi->s_group_desc[i] = sb_bread(sb, block); | |
1839 | if (!sbi->s_group_desc[i]) { | |
1840 | printk (KERN_ERR "EXT3-fs: " | |
1841 | "can't read group descriptor %d\n", i); | |
1842 | db_count = i; | |
1843 | goto failed_mount2; | |
1844 | } | |
1845 | } | |
1846 | if (!ext3_check_descriptors (sb)) { | |
d2e5b13c | 1847 | printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n"); |
1da177e4 LT |
1848 | goto failed_mount2; |
1849 | } | |
1850 | sbi->s_gdb_count = db_count; | |
1851 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1852 | spin_lock_init(&sbi->s_next_gen_lock); | |
0216bfcf | 1853 | |
833f4077 PZ |
1854 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
1855 | ext3_count_free_blocks(sb)); | |
1856 | if (!err) { | |
1857 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
1858 | ext3_count_free_inodes(sb)); | |
1859 | } | |
1860 | if (!err) { | |
1861 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
1862 | ext3_count_dirs(sb)); | |
1863 | } | |
1864 | if (err) { | |
1865 | printk(KERN_ERR "EXT3-fs: insufficient memory\n"); | |
1866 | goto failed_mount3; | |
1867 | } | |
0216bfcf | 1868 | |
1da177e4 LT |
1869 | /* per fileystem reservation list head & lock */ |
1870 | spin_lock_init(&sbi->s_rsv_window_lock); | |
1871 | sbi->s_rsv_window_root = RB_ROOT; | |
1872 | /* Add a single, static dummy reservation to the start of the | |
1873 | * reservation window list --- it gives us a placeholder for | |
1874 | * append-at-start-of-list which makes the allocation logic | |
1875 | * _much_ simpler. */ | |
1876 | sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1877 | sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1878 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; | |
1879 | sbi->s_rsv_window_head.rsv_goal_size = 0; | |
1880 | ext3_rsv_window_add(sb, &sbi->s_rsv_window_head); | |
1881 | ||
1882 | /* | |
1883 | * set up enough so that it can read an inode | |
1884 | */ | |
1885 | sb->s_op = &ext3_sops; | |
1886 | sb->s_export_op = &ext3_export_ops; | |
1887 | sb->s_xattr = ext3_xattr_handlers; | |
1888 | #ifdef CONFIG_QUOTA | |
1889 | sb->s_qcop = &ext3_qctl_operations; | |
1890 | sb->dq_op = &ext3_quota_operations; | |
1891 | #endif | |
1892 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
1893 | ||
1894 | sb->s_root = NULL; | |
1895 | ||
1896 | needs_recovery = (es->s_last_orphan != 0 || | |
1897 | EXT3_HAS_INCOMPAT_FEATURE(sb, | |
1898 | EXT3_FEATURE_INCOMPAT_RECOVER)); | |
1899 | ||
1900 | /* | |
1901 | * The first inode we look at is the journal inode. Don't try | |
1902 | * root first: it may be modified in the journal! | |
1903 | */ | |
1904 | if (!test_opt(sb, NOLOAD) && | |
1905 | EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { | |
71b96257 | 1906 | if (ext3_load_journal(sb, es, journal_devnum)) |
0216bfcf | 1907 | goto failed_mount3; |
1da177e4 LT |
1908 | } else if (journal_inum) { |
1909 | if (ext3_create_journal(sb, es, journal_inum)) | |
0216bfcf | 1910 | goto failed_mount3; |
1da177e4 LT |
1911 | } else { |
1912 | if (!silent) | |
1913 | printk (KERN_ERR | |
1914 | "ext3: No journal on filesystem on %s\n", | |
1915 | sb->s_id); | |
0216bfcf | 1916 | goto failed_mount3; |
1da177e4 LT |
1917 | } |
1918 | ||
1919 | /* We have now updated the journal if required, so we can | |
1920 | * validate the data journaling mode. */ | |
1921 | switch (test_opt(sb, DATA_FLAGS)) { | |
1922 | case 0: | |
1923 | /* No mode set, assume a default based on the journal | |
1924 | capabilities: ORDERED_DATA if the journal can | |
1925 | cope, else JOURNAL_DATA */ | |
1926 | if (journal_check_available_features | |
1927 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) | |
bbae8bcc | 1928 | set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE); |
1da177e4 LT |
1929 | else |
1930 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
1931 | break; | |
1932 | ||
1933 | case EXT3_MOUNT_ORDERED_DATA: | |
1934 | case EXT3_MOUNT_WRITEBACK_DATA: | |
1935 | if (!journal_check_available_features | |
1936 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) { | |
1937 | printk(KERN_ERR "EXT3-fs: Journal does not support " | |
1938 | "requested data journaling mode\n"); | |
0216bfcf | 1939 | goto failed_mount4; |
1da177e4 LT |
1940 | } |
1941 | default: | |
1942 | break; | |
1943 | } | |
1944 | ||
1945 | if (test_opt(sb, NOBH)) { | |
1da177e4 LT |
1946 | if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) { |
1947 | printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - " | |
1948 | "its supported only with writeback mode\n"); | |
1949 | clear_opt(sbi->s_mount_opt, NOBH); | |
1950 | } | |
1951 | } | |
1952 | /* | |
1953 | * The journal_load will have done any necessary log recovery, | |
1954 | * so we can safely mount the rest of the filesystem now. | |
1955 | */ | |
1956 | ||
473043dc DH |
1957 | root = ext3_iget(sb, EXT3_ROOT_INO); |
1958 | if (IS_ERR(root)) { | |
1da177e4 | 1959 | printk(KERN_ERR "EXT3-fs: get root inode failed\n"); |
473043dc | 1960 | ret = PTR_ERR(root); |
0216bfcf | 1961 | goto failed_mount4; |
1da177e4 LT |
1962 | } |
1963 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
473043dc | 1964 | iput(root); |
1da177e4 | 1965 | printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n"); |
0216bfcf | 1966 | goto failed_mount4; |
1da177e4 | 1967 | } |
473043dc DH |
1968 | sb->s_root = d_alloc_root(root); |
1969 | if (!sb->s_root) { | |
1970 | printk(KERN_ERR "EXT3-fs: get root dentry failed\n"); | |
1971 | iput(root); | |
1972 | ret = -ENOMEM; | |
1973 | goto failed_mount4; | |
1974 | } | |
1da177e4 LT |
1975 | |
1976 | ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY); | |
1977 | /* | |
1978 | * akpm: core read_super() calls in here with the superblock locked. | |
1979 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
1980 | * in numerous places. Here we just pop the lock - it's relatively | |
1981 | * harmless, because we are now ready to accept write_super() requests, | |
1982 | * and aviro says that's the only reason for hanging onto the | |
1983 | * superblock lock. | |
1984 | */ | |
1985 | EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS; | |
1986 | ext3_orphan_cleanup(sb, es); | |
1987 | EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS; | |
1988 | if (needs_recovery) | |
1989 | printk (KERN_INFO "EXT3-fs: recovery complete.\n"); | |
1990 | ext3_mark_recovery_complete(sb, es); | |
1991 | printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n", | |
1992 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal": | |
1993 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered": | |
1994 | "writeback"); | |
1995 | ||
1da177e4 LT |
1996 | lock_kernel(); |
1997 | return 0; | |
1998 | ||
1999 | cantfind_ext3: | |
2000 | if (!silent) | |
2001 | printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n", | |
2002 | sb->s_id); | |
2003 | goto failed_mount; | |
2004 | ||
0216bfcf | 2005 | failed_mount4: |
1da177e4 | 2006 | journal_destroy(sbi->s_journal); |
0216bfcf MC |
2007 | failed_mount3: |
2008 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2009 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2010 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
1da177e4 LT |
2011 | failed_mount2: |
2012 | for (i = 0; i < db_count; i++) | |
2013 | brelse(sbi->s_group_desc[i]); | |
2014 | kfree(sbi->s_group_desc); | |
2015 | failed_mount: | |
2016 | #ifdef CONFIG_QUOTA | |
2017 | for (i = 0; i < MAXQUOTAS; i++) | |
2018 | kfree(sbi->s_qf_names[i]); | |
2019 | #endif | |
2020 | ext3_blkdev_remove(sbi); | |
2021 | brelse(bh); | |
2022 | out_fail: | |
2023 | sb->s_fs_info = NULL; | |
de5ce037 | 2024 | kfree(sbi->s_blockgroup_lock); |
1da177e4 LT |
2025 | kfree(sbi); |
2026 | lock_kernel(); | |
473043dc | 2027 | return ret; |
1da177e4 LT |
2028 | } |
2029 | ||
2030 | /* | |
2031 | * Setup any per-fs journal parameters now. We'll do this both on | |
2032 | * initial mount, once the journal has been initialised but before we've | |
ae6ddcc5 | 2033 | * done any recovery; and again on any subsequent remount. |
1da177e4 LT |
2034 | */ |
2035 | static void ext3_init_journal_params(struct super_block *sb, journal_t *journal) | |
2036 | { | |
2037 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
2038 | ||
2039 | if (sbi->s_commit_interval) | |
2040 | journal->j_commit_interval = sbi->s_commit_interval; | |
2041 | /* We could also set up an ext3-specific default for the commit | |
2042 | * interval here, but for now we'll just fall back to the jbd | |
2043 | * default. */ | |
2044 | ||
2045 | spin_lock(&journal->j_state_lock); | |
2046 | if (test_opt(sb, BARRIER)) | |
2047 | journal->j_flags |= JFS_BARRIER; | |
2048 | else | |
2049 | journal->j_flags &= ~JFS_BARRIER; | |
0e4fb5e2 HK |
2050 | if (test_opt(sb, DATA_ERR_ABORT)) |
2051 | journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR; | |
2052 | else | |
2053 | journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR; | |
1da177e4 LT |
2054 | spin_unlock(&journal->j_state_lock); |
2055 | } | |
2056 | ||
eee194e7 ES |
2057 | static journal_t *ext3_get_journal(struct super_block *sb, |
2058 | unsigned int journal_inum) | |
1da177e4 LT |
2059 | { |
2060 | struct inode *journal_inode; | |
2061 | journal_t *journal; | |
2062 | ||
2063 | /* First, test for the existence of a valid inode on disk. Bad | |
2064 | * things happen if we iget() an unused inode, as the subsequent | |
2065 | * iput() will try to delete it. */ | |
2066 | ||
473043dc DH |
2067 | journal_inode = ext3_iget(sb, journal_inum); |
2068 | if (IS_ERR(journal_inode)) { | |
1da177e4 LT |
2069 | printk(KERN_ERR "EXT3-fs: no journal found.\n"); |
2070 | return NULL; | |
2071 | } | |
2072 | if (!journal_inode->i_nlink) { | |
2073 | make_bad_inode(journal_inode); | |
2074 | iput(journal_inode); | |
2075 | printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n"); | |
2076 | return NULL; | |
2077 | } | |
2078 | ||
2079 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", | |
2080 | journal_inode, journal_inode->i_size); | |
473043dc | 2081 | if (!S_ISREG(journal_inode->i_mode)) { |
1da177e4 LT |
2082 | printk(KERN_ERR "EXT3-fs: invalid journal inode.\n"); |
2083 | iput(journal_inode); | |
2084 | return NULL; | |
2085 | } | |
2086 | ||
2087 | journal = journal_init_inode(journal_inode); | |
2088 | if (!journal) { | |
2089 | printk(KERN_ERR "EXT3-fs: Could not load journal inode\n"); | |
2090 | iput(journal_inode); | |
2091 | return NULL; | |
2092 | } | |
2093 | journal->j_private = sb; | |
2094 | ext3_init_journal_params(sb, journal); | |
2095 | return journal; | |
2096 | } | |
2097 | ||
2098 | static journal_t *ext3_get_dev_journal(struct super_block *sb, | |
2099 | dev_t j_dev) | |
2100 | { | |
2101 | struct buffer_head * bh; | |
2102 | journal_t *journal; | |
43d23f90 | 2103 | ext3_fsblk_t start; |
1c2bf374 | 2104 | ext3_fsblk_t len; |
1da177e4 | 2105 | int hblock, blocksize; |
43d23f90 | 2106 | ext3_fsblk_t sb_block; |
1da177e4 LT |
2107 | unsigned long offset; |
2108 | struct ext3_super_block * es; | |
2109 | struct block_device *bdev; | |
2110 | ||
2111 | bdev = ext3_blkdev_get(j_dev); | |
2112 | if (bdev == NULL) | |
2113 | return NULL; | |
2114 | ||
2115 | if (bd_claim(bdev, sb)) { | |
2116 | printk(KERN_ERR | |
2117 | "EXT3: failed to claim external journal device.\n"); | |
9a1c3542 | 2118 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
1da177e4 LT |
2119 | return NULL; |
2120 | } | |
2121 | ||
2122 | blocksize = sb->s_blocksize; | |
e1defc4f | 2123 | hblock = bdev_logical_block_size(bdev); |
1da177e4 LT |
2124 | if (blocksize < hblock) { |
2125 | printk(KERN_ERR | |
2126 | "EXT3-fs: blocksize too small for journal device.\n"); | |
2127 | goto out_bdev; | |
2128 | } | |
2129 | ||
2130 | sb_block = EXT3_MIN_BLOCK_SIZE / blocksize; | |
2131 | offset = EXT3_MIN_BLOCK_SIZE % blocksize; | |
2132 | set_blocksize(bdev, blocksize); | |
2133 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
2134 | printk(KERN_ERR "EXT3-fs: couldn't read superblock of " | |
2135 | "external journal\n"); | |
2136 | goto out_bdev; | |
2137 | } | |
2138 | ||
2139 | es = (struct ext3_super_block *) (((char *)bh->b_data) + offset); | |
2140 | if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) || | |
2141 | !(le32_to_cpu(es->s_feature_incompat) & | |
2142 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
2143 | printk(KERN_ERR "EXT3-fs: external journal has " | |
2144 | "bad superblock\n"); | |
2145 | brelse(bh); | |
2146 | goto out_bdev; | |
2147 | } | |
2148 | ||
2149 | if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { | |
2150 | printk(KERN_ERR "EXT3-fs: journal UUID does not match\n"); | |
2151 | brelse(bh); | |
2152 | goto out_bdev; | |
2153 | } | |
2154 | ||
2155 | len = le32_to_cpu(es->s_blocks_count); | |
2156 | start = sb_block + 1; | |
2157 | brelse(bh); /* we're done with the superblock */ | |
2158 | ||
2159 | journal = journal_init_dev(bdev, sb->s_bdev, | |
2160 | start, len, blocksize); | |
2161 | if (!journal) { | |
2162 | printk(KERN_ERR "EXT3-fs: failed to create device journal\n"); | |
2163 | goto out_bdev; | |
2164 | } | |
2165 | journal->j_private = sb; | |
2166 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2167 | wait_on_buffer(journal->j_sb_buffer); | |
2168 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
2169 | printk(KERN_ERR "EXT3-fs: I/O error on journal device\n"); | |
2170 | goto out_journal; | |
2171 | } | |
2172 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
2173 | printk(KERN_ERR "EXT3-fs: External journal has more than one " | |
2174 | "user (unsupported) - %d\n", | |
2175 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
2176 | goto out_journal; | |
2177 | } | |
2178 | EXT3_SB(sb)->journal_bdev = bdev; | |
2179 | ext3_init_journal_params(sb, journal); | |
2180 | return journal; | |
2181 | out_journal: | |
2182 | journal_destroy(journal); | |
2183 | out_bdev: | |
2184 | ext3_blkdev_put(bdev); | |
2185 | return NULL; | |
2186 | } | |
2187 | ||
71b96257 JL |
2188 | static int ext3_load_journal(struct super_block *sb, |
2189 | struct ext3_super_block *es, | |
2190 | unsigned long journal_devnum) | |
1da177e4 LT |
2191 | { |
2192 | journal_t *journal; | |
eee194e7 | 2193 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
71b96257 | 2194 | dev_t journal_dev; |
1da177e4 LT |
2195 | int err = 0; |
2196 | int really_read_only; | |
2197 | ||
71b96257 JL |
2198 | if (journal_devnum && |
2199 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2200 | printk(KERN_INFO "EXT3-fs: external journal device major/minor " | |
2201 | "numbers have changed\n"); | |
2202 | journal_dev = new_decode_dev(journal_devnum); | |
2203 | } else | |
2204 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2205 | ||
1da177e4 LT |
2206 | really_read_only = bdev_read_only(sb->s_bdev); |
2207 | ||
2208 | /* | |
2209 | * Are we loading a blank journal or performing recovery after a | |
2210 | * crash? For recovery, we need to check in advance whether we | |
2211 | * can get read-write access to the device. | |
2212 | */ | |
2213 | ||
2214 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) { | |
2215 | if (sb->s_flags & MS_RDONLY) { | |
2216 | printk(KERN_INFO "EXT3-fs: INFO: recovery " | |
2217 | "required on readonly filesystem.\n"); | |
2218 | if (really_read_only) { | |
2219 | printk(KERN_ERR "EXT3-fs: write access " | |
2220 | "unavailable, cannot proceed.\n"); | |
2221 | return -EROFS; | |
2222 | } | |
2223 | printk (KERN_INFO "EXT3-fs: write access will " | |
2224 | "be enabled during recovery.\n"); | |
2225 | } | |
2226 | } | |
2227 | ||
2228 | if (journal_inum && journal_dev) { | |
2229 | printk(KERN_ERR "EXT3-fs: filesystem has both journal " | |
2230 | "and inode journals!\n"); | |
2231 | return -EINVAL; | |
2232 | } | |
2233 | ||
2234 | if (journal_inum) { | |
2235 | if (!(journal = ext3_get_journal(sb, journal_inum))) | |
2236 | return -EINVAL; | |
2237 | } else { | |
2238 | if (!(journal = ext3_get_dev_journal(sb, journal_dev))) | |
2239 | return -EINVAL; | |
2240 | } | |
2241 | ||
2242 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { | |
2243 | err = journal_update_format(journal); | |
2244 | if (err) { | |
2245 | printk(KERN_ERR "EXT3-fs: error updating journal.\n"); | |
2246 | journal_destroy(journal); | |
2247 | return err; | |
2248 | } | |
2249 | } | |
2250 | ||
2251 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) | |
2252 | err = journal_wipe(journal, !really_read_only); | |
2253 | if (!err) | |
2254 | err = journal_load(journal); | |
2255 | ||
2256 | if (err) { | |
2257 | printk(KERN_ERR "EXT3-fs: error loading journal.\n"); | |
2258 | journal_destroy(journal); | |
2259 | return err; | |
2260 | } | |
2261 | ||
2262 | EXT3_SB(sb)->s_journal = journal; | |
2263 | ext3_clear_journal_err(sb, es); | |
71b96257 JL |
2264 | |
2265 | if (journal_devnum && | |
2266 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2267 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
71b96257 JL |
2268 | |
2269 | /* Make sure we flush the recovery flag to disk. */ | |
2270 | ext3_commit_super(sb, es, 1); | |
2271 | } | |
2272 | ||
1da177e4 LT |
2273 | return 0; |
2274 | } | |
2275 | ||
2276 | static int ext3_create_journal(struct super_block * sb, | |
2277 | struct ext3_super_block * es, | |
eee194e7 | 2278 | unsigned int journal_inum) |
1da177e4 LT |
2279 | { |
2280 | journal_t *journal; | |
952d9de1 | 2281 | int err; |
1da177e4 LT |
2282 | |
2283 | if (sb->s_flags & MS_RDONLY) { | |
2284 | printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to " | |
2285 | "create journal.\n"); | |
2286 | return -EROFS; | |
2287 | } | |
2288 | ||
952d9de1 BP |
2289 | journal = ext3_get_journal(sb, journal_inum); |
2290 | if (!journal) | |
1da177e4 LT |
2291 | return -EINVAL; |
2292 | ||
eee194e7 | 2293 | printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n", |
1da177e4 LT |
2294 | journal_inum); |
2295 | ||
952d9de1 BP |
2296 | err = journal_create(journal); |
2297 | if (err) { | |
1da177e4 LT |
2298 | printk(KERN_ERR "EXT3-fs: error creating journal.\n"); |
2299 | journal_destroy(journal); | |
2300 | return -EIO; | |
2301 | } | |
2302 | ||
2303 | EXT3_SB(sb)->s_journal = journal; | |
2304 | ||
2305 | ext3_update_dynamic_rev(sb); | |
2306 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2307 | EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL); | |
2308 | ||
2309 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
1da177e4 LT |
2310 | |
2311 | /* Make sure we flush the recovery flag to disk. */ | |
2312 | ext3_commit_super(sb, es, 1); | |
2313 | ||
2314 | return 0; | |
2315 | } | |
2316 | ||
c4be0c1d TS |
2317 | static int ext3_commit_super(struct super_block *sb, |
2318 | struct ext3_super_block *es, | |
1da177e4 LT |
2319 | int sync) |
2320 | { | |
2321 | struct buffer_head *sbh = EXT3_SB(sb)->s_sbh; | |
c4be0c1d | 2322 | int error = 0; |
1da177e4 LT |
2323 | |
2324 | if (!sbh) | |
c4be0c1d | 2325 | return error; |
96ec2e0a TT |
2326 | /* |
2327 | * If the file system is mounted read-only, don't update the | |
2328 | * superblock write time. This avoids updating the superblock | |
2329 | * write time when we are mounting the root file system | |
2330 | * read/only but we need to replay the journal; at that point, | |
2331 | * for people who are east of GMT and who make their clock | |
2332 | * tick in localtime for Windows bug-for-bug compatibility, | |
2333 | * the clock is set in the future, and this will cause e2fsck | |
2334 | * to complain and force a full file system check. | |
2335 | */ | |
2336 | if (!(sb->s_flags & MS_RDONLY)) | |
2337 | es->s_wtime = cpu_to_le32(get_seconds()); | |
1da177e4 LT |
2338 | es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb)); |
2339 | es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb)); | |
2340 | BUFFER_TRACE(sbh, "marking dirty"); | |
2341 | mark_buffer_dirty(sbh); | |
2342 | if (sync) | |
c4be0c1d TS |
2343 | error = sync_dirty_buffer(sbh); |
2344 | return error; | |
1da177e4 LT |
2345 | } |
2346 | ||
2347 | ||
2348 | /* | |
2349 | * Have we just finished recovery? If so, and if we are mounting (or | |
2350 | * remounting) the filesystem readonly, then we will end up with a | |
2351 | * consistent fs on disk. Record that fact. | |
2352 | */ | |
2353 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
2354 | struct ext3_super_block * es) | |
2355 | { | |
2356 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
2357 | ||
2358 | journal_lock_updates(journal); | |
2d7c820e HK |
2359 | if (journal_flush(journal) < 0) |
2360 | goto out; | |
2361 | ||
030703e4 | 2362 | lock_super(sb); |
1da177e4 LT |
2363 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) && |
2364 | sb->s_flags & MS_RDONLY) { | |
2365 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1da177e4 LT |
2366 | ext3_commit_super(sb, es, 1); |
2367 | } | |
030703e4 | 2368 | unlock_super(sb); |
2d7c820e HK |
2369 | |
2370 | out: | |
1da177e4 LT |
2371 | journal_unlock_updates(journal); |
2372 | } | |
2373 | ||
2374 | /* | |
2375 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2376 | * has recorded an error from a previous lifetime, move that error to the | |
2377 | * main filesystem now. | |
2378 | */ | |
2379 | static void ext3_clear_journal_err(struct super_block * sb, | |
2380 | struct ext3_super_block * es) | |
2381 | { | |
2382 | journal_t *journal; | |
2383 | int j_errno; | |
2384 | const char *errstr; | |
2385 | ||
2386 | journal = EXT3_SB(sb)->s_journal; | |
2387 | ||
2388 | /* | |
2389 | * Now check for any error status which may have been recorded in the | |
2390 | * journal by a prior ext3_error() or ext3_abort() | |
2391 | */ | |
2392 | ||
2393 | j_errno = journal_errno(journal); | |
2394 | if (j_errno) { | |
2395 | char nbuf[16]; | |
2396 | ||
2397 | errstr = ext3_decode_error(sb, j_errno, nbuf); | |
e05b6b52 | 2398 | ext3_warning(sb, __func__, "Filesystem error recorded " |
1da177e4 | 2399 | "from previous mount: %s", errstr); |
e05b6b52 | 2400 | ext3_warning(sb, __func__, "Marking fs in need of " |
1da177e4 LT |
2401 | "filesystem check."); |
2402 | ||
2403 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
2404 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
2405 | ext3_commit_super (sb, es, 1); | |
2406 | ||
2407 | journal_clear_err(journal); | |
2408 | } | |
2409 | } | |
2410 | ||
2411 | /* | |
2412 | * Force the running and committing transactions to commit, | |
2413 | * and wait on the commit. | |
2414 | */ | |
2415 | int ext3_force_commit(struct super_block *sb) | |
2416 | { | |
2417 | journal_t *journal; | |
2418 | int ret; | |
2419 | ||
2420 | if (sb->s_flags & MS_RDONLY) | |
2421 | return 0; | |
2422 | ||
2423 | journal = EXT3_SB(sb)->s_journal; | |
1da177e4 LT |
2424 | ret = ext3_journal_force_commit(journal); |
2425 | return ret; | |
2426 | } | |
2427 | ||
1da177e4 LT |
2428 | static int ext3_sync_fs(struct super_block *sb, int wait) |
2429 | { | |
02ac597c | 2430 | tid_t target; |
c87591b7 | 2431 | |
02ac597c JK |
2432 | if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { |
2433 | if (wait) | |
2434 | log_wait_commit(EXT3_SB(sb)->s_journal, target); | |
2435 | } | |
1da177e4 LT |
2436 | return 0; |
2437 | } | |
2438 | ||
2439 | /* | |
2440 | * LVM calls this function before a (read-only) snapshot is created. This | |
2441 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2442 | */ | |
c4be0c1d | 2443 | static int ext3_freeze(struct super_block *sb) |
1da177e4 | 2444 | { |
c4be0c1d TS |
2445 | int error = 0; |
2446 | journal_t *journal; | |
1da177e4 LT |
2447 | |
2448 | if (!(sb->s_flags & MS_RDONLY)) { | |
c4be0c1d | 2449 | journal = EXT3_SB(sb)->s_journal; |
1da177e4 LT |
2450 | |
2451 | /* Now we set up the journal barrier. */ | |
2452 | journal_lock_updates(journal); | |
2d7c820e HK |
2453 | |
2454 | /* | |
2455 | * We don't want to clear needs_recovery flag when we failed | |
2456 | * to flush the journal. | |
2457 | */ | |
c4be0c1d TS |
2458 | error = journal_flush(journal); |
2459 | if (error < 0) | |
2460 | goto out; | |
1da177e4 LT |
2461 | |
2462 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
2463 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
c4be0c1d TS |
2464 | error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); |
2465 | if (error) | |
2466 | goto out; | |
1da177e4 | 2467 | } |
c4be0c1d TS |
2468 | return 0; |
2469 | ||
2470 | out: | |
2471 | journal_unlock_updates(journal); | |
2472 | return error; | |
1da177e4 LT |
2473 | } |
2474 | ||
2475 | /* | |
2476 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2477 | * flag here, even though the filesystem is not technically dirty yet. | |
2478 | */ | |
c4be0c1d | 2479 | static int ext3_unfreeze(struct super_block *sb) |
1da177e4 LT |
2480 | { |
2481 | if (!(sb->s_flags & MS_RDONLY)) { | |
2482 | lock_super(sb); | |
2483 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
2484 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2485 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); | |
2486 | unlock_super(sb); | |
2487 | journal_unlock_updates(EXT3_SB(sb)->s_journal); | |
2488 | } | |
c4be0c1d | 2489 | return 0; |
1da177e4 LT |
2490 | } |
2491 | ||
2492 | static int ext3_remount (struct super_block * sb, int * flags, char * data) | |
2493 | { | |
2494 | struct ext3_super_block * es; | |
2495 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 2496 | ext3_fsblk_t n_blocks_count = 0; |
08c6a96f JK |
2497 | unsigned long old_sb_flags; |
2498 | struct ext3_mount_options old_opts; | |
2499 | int err; | |
2500 | #ifdef CONFIG_QUOTA | |
2501 | int i; | |
2502 | #endif | |
2503 | ||
337eb00a AIB |
2504 | lock_kernel(); |
2505 | ||
08c6a96f | 2506 | /* Store the original options */ |
bbd6851a | 2507 | lock_super(sb); |
08c6a96f JK |
2508 | old_sb_flags = sb->s_flags; |
2509 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2510 | old_opts.s_resuid = sbi->s_resuid; | |
2511 | old_opts.s_resgid = sbi->s_resgid; | |
2512 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2513 | #ifdef CONFIG_QUOTA | |
2514 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
2515 | for (i = 0; i < MAXQUOTAS; i++) | |
2516 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
2517 | #endif | |
1da177e4 LT |
2518 | |
2519 | /* | |
2520 | * Allow the "check" option to be passed as a remount option. | |
2521 | */ | |
71b96257 | 2522 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { |
08c6a96f JK |
2523 | err = -EINVAL; |
2524 | goto restore_opts; | |
2525 | } | |
1da177e4 LT |
2526 | |
2527 | if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) | |
e05b6b52 | 2528 | ext3_abort(sb, __func__, "Abort forced by user"); |
1da177e4 LT |
2529 | |
2530 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
2531 | ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); | |
2532 | ||
2533 | es = sbi->s_es; | |
2534 | ||
2535 | ext3_init_journal_params(sb, sbi->s_journal); | |
2536 | ||
2537 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
2538 | n_blocks_count > le32_to_cpu(es->s_blocks_count)) { | |
08c6a96f JK |
2539 | if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) { |
2540 | err = -EROFS; | |
2541 | goto restore_opts; | |
2542 | } | |
1da177e4 LT |
2543 | |
2544 | if (*flags & MS_RDONLY) { | |
2545 | /* | |
2546 | * First of all, the unconditional stuff we have to do | |
2547 | * to disable replay of the journal when we next remount | |
2548 | */ | |
2549 | sb->s_flags |= MS_RDONLY; | |
2550 | ||
2551 | /* | |
2552 | * OK, test if we are remounting a valid rw partition | |
2553 | * readonly, and if so set the rdonly flag and then | |
2554 | * mark the partition as valid again. | |
2555 | */ | |
2556 | if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) && | |
2557 | (sbi->s_mount_state & EXT3_VALID_FS)) | |
2558 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
2559 | ||
030703e4 JK |
2560 | /* |
2561 | * We have to unlock super so that we can wait for | |
2562 | * transactions. | |
2563 | */ | |
2564 | unlock_super(sb); | |
1da177e4 | 2565 | ext3_mark_recovery_complete(sb, es); |
030703e4 | 2566 | lock_super(sb); |
1da177e4 LT |
2567 | } else { |
2568 | __le32 ret; | |
2569 | if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb, | |
2570 | ~EXT3_FEATURE_RO_COMPAT_SUPP))) { | |
2571 | printk(KERN_WARNING "EXT3-fs: %s: couldn't " | |
2572 | "remount RDWR because of unsupported " | |
2573 | "optional features (%x).\n", | |
2574 | sb->s_id, le32_to_cpu(ret)); | |
08c6a96f JK |
2575 | err = -EROFS; |
2576 | goto restore_opts; | |
1da177e4 | 2577 | } |
ea9a05a1 ES |
2578 | |
2579 | /* | |
2580 | * If we have an unprocessed orphan list hanging | |
2581 | * around from a previously readonly bdev mount, | |
2582 | * require a full umount/remount for now. | |
2583 | */ | |
2584 | if (es->s_last_orphan) { | |
2585 | printk(KERN_WARNING "EXT3-fs: %s: couldn't " | |
2586 | "remount RDWR because of unprocessed " | |
2587 | "orphan inode list. Please " | |
2588 | "umount/remount instead.\n", | |
2589 | sb->s_id); | |
2590 | err = -EINVAL; | |
2591 | goto restore_opts; | |
2592 | } | |
2593 | ||
1da177e4 LT |
2594 | /* |
2595 | * Mounting a RDONLY partition read-write, so reread | |
2596 | * and store the current valid flag. (It may have | |
2597 | * been changed by e2fsck since we originally mounted | |
2598 | * the partition.) | |
2599 | */ | |
2600 | ext3_clear_journal_err(sb, es); | |
2601 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
a4e4de36 | 2602 | if ((err = ext3_group_extend(sb, es, n_blocks_count))) |
08c6a96f | 2603 | goto restore_opts; |
1da177e4 LT |
2604 | if (!ext3_setup_super (sb, es, 0)) |
2605 | sb->s_flags &= ~MS_RDONLY; | |
2606 | } | |
2607 | } | |
08c6a96f JK |
2608 | #ifdef CONFIG_QUOTA |
2609 | /* Release old quota file names */ | |
2610 | for (i = 0; i < MAXQUOTAS; i++) | |
2611 | if (old_opts.s_qf_names[i] && | |
2612 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2613 | kfree(old_opts.s_qf_names[i]); | |
2614 | #endif | |
bbd6851a | 2615 | unlock_super(sb); |
337eb00a | 2616 | unlock_kernel(); |
1da177e4 | 2617 | return 0; |
08c6a96f JK |
2618 | restore_opts: |
2619 | sb->s_flags = old_sb_flags; | |
2620 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
2621 | sbi->s_resuid = old_opts.s_resuid; | |
2622 | sbi->s_resgid = old_opts.s_resgid; | |
2623 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
2624 | #ifdef CONFIG_QUOTA | |
2625 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
2626 | for (i = 0; i < MAXQUOTAS; i++) { | |
2627 | if (sbi->s_qf_names[i] && | |
2628 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2629 | kfree(sbi->s_qf_names[i]); | |
2630 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
2631 | } | |
2632 | #endif | |
bbd6851a | 2633 | unlock_super(sb); |
337eb00a | 2634 | unlock_kernel(); |
08c6a96f | 2635 | return err; |
1da177e4 LT |
2636 | } |
2637 | ||
726c3342 | 2638 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf) |
1da177e4 | 2639 | { |
726c3342 | 2640 | struct super_block *sb = dentry->d_sb; |
09fe316a AT |
2641 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
2642 | struct ext3_super_block *es = sbi->s_es; | |
50ee0a32 | 2643 | u64 fsid; |
1da177e4 | 2644 | |
a71ce8c6 BP |
2645 | if (test_opt(sb, MINIX_DF)) { |
2646 | sbi->s_overhead_last = 0; | |
2647 | } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { | |
2648 | unsigned long ngroups = sbi->s_groups_count, i; | |
2649 | ext3_fsblk_t overhead = 0; | |
1da177e4 LT |
2650 | smp_rmb(); |
2651 | ||
2652 | /* | |
a71ce8c6 BP |
2653 | * Compute the overhead (FS structures). This is constant |
2654 | * for a given filesystem unless the number of block groups | |
2655 | * changes so we cache the previous value until it does. | |
1da177e4 LT |
2656 | */ |
2657 | ||
2658 | /* | |
2659 | * All of the blocks before first_data_block are | |
2660 | * overhead | |
2661 | */ | |
2662 | overhead = le32_to_cpu(es->s_first_data_block); | |
2663 | ||
2664 | /* | |
2665 | * Add the overhead attributed to the superblock and | |
2666 | * block group descriptors. If the sparse superblocks | |
2667 | * feature is turned on, then not all groups have this. | |
2668 | */ | |
2669 | for (i = 0; i < ngroups; i++) { | |
2670 | overhead += ext3_bg_has_super(sb, i) + | |
2671 | ext3_bg_num_gdb(sb, i); | |
2672 | cond_resched(); | |
2673 | } | |
2674 | ||
2675 | /* | |
2676 | * Every block group has an inode bitmap, a block | |
2677 | * bitmap, and an inode table. | |
2678 | */ | |
a71ce8c6 BP |
2679 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
2680 | sbi->s_overhead_last = overhead; | |
2681 | smp_wmb(); | |
2682 | sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); | |
1da177e4 LT |
2683 | } |
2684 | ||
2685 | buf->f_type = EXT3_SUPER_MAGIC; | |
2686 | buf->f_bsize = sb->s_blocksize; | |
a71ce8c6 | 2687 | buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last; |
52d9f3b4 | 2688 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); |
1da177e4 LT |
2689 | buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); |
2690 | if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) | |
2691 | buf->f_bavail = 0; | |
2692 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 2693 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
1da177e4 | 2694 | buf->f_namelen = EXT3_NAME_LEN; |
50ee0a32 PE |
2695 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
2696 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
2697 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
2698 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
1da177e4 LT |
2699 | return 0; |
2700 | } | |
2701 | ||
2702 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
2703 | * is locked for write. Otherwise the are possible deadlocks: | |
2704 | * Process 1 Process 2 | |
2705 | * ext3_create() quota_sync() | |
2706 | * journal_start() write_dquot() | |
81a05227 | 2707 | * vfs_dq_init() down(dqio_mutex) |
d3be915f | 2708 | * down(dqio_mutex) journal_start() |
1da177e4 LT |
2709 | * |
2710 | */ | |
2711 | ||
2712 | #ifdef CONFIG_QUOTA | |
2713 | ||
2714 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
2715 | { | |
2716 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
2717 | } | |
2718 | ||
1da177e4 LT |
2719 | static int ext3_write_dquot(struct dquot *dquot) |
2720 | { | |
2721 | int ret, err; | |
2722 | handle_t *handle; | |
2723 | struct inode *inode; | |
2724 | ||
2725 | inode = dquot_to_inode(dquot); | |
2726 | handle = ext3_journal_start(inode, | |
1f54587b | 2727 | EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2728 | if (IS_ERR(handle)) |
2729 | return PTR_ERR(handle); | |
2730 | ret = dquot_commit(dquot); | |
2731 | err = ext3_journal_stop(handle); | |
2732 | if (!ret) | |
2733 | ret = err; | |
2734 | return ret; | |
2735 | } | |
2736 | ||
2737 | static int ext3_acquire_dquot(struct dquot *dquot) | |
2738 | { | |
2739 | int ret, err; | |
2740 | handle_t *handle; | |
2741 | ||
2742 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2743 | EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2744 | if (IS_ERR(handle)) |
2745 | return PTR_ERR(handle); | |
2746 | ret = dquot_acquire(dquot); | |
2747 | err = ext3_journal_stop(handle); | |
2748 | if (!ret) | |
2749 | ret = err; | |
2750 | return ret; | |
2751 | } | |
2752 | ||
2753 | static int ext3_release_dquot(struct dquot *dquot) | |
2754 | { | |
2755 | int ret, err; | |
2756 | handle_t *handle; | |
2757 | ||
2758 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2759 | EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
2760 | if (IS_ERR(handle)) { |
2761 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2762 | dquot_release(dquot); | |
1da177e4 | 2763 | return PTR_ERR(handle); |
9c3013e9 | 2764 | } |
1da177e4 LT |
2765 | ret = dquot_release(dquot); |
2766 | err = ext3_journal_stop(handle); | |
2767 | if (!ret) | |
2768 | ret = err; | |
2769 | return ret; | |
2770 | } | |
2771 | ||
2772 | static int ext3_mark_dquot_dirty(struct dquot *dquot) | |
2773 | { | |
99aeaf63 | 2774 | /* Are we journaling quotas? */ |
1da177e4 LT |
2775 | if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2776 | EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2777 | dquot_mark_dquot_dirty(dquot); | |
2778 | return ext3_write_dquot(dquot); | |
2779 | } else { | |
2780 | return dquot_mark_dquot_dirty(dquot); | |
2781 | } | |
2782 | } | |
2783 | ||
2784 | static int ext3_write_info(struct super_block *sb, int type) | |
2785 | { | |
2786 | int ret, err; | |
2787 | handle_t *handle; | |
2788 | ||
2789 | /* Data block + inode block */ | |
2790 | handle = ext3_journal_start(sb->s_root->d_inode, 2); | |
2791 | if (IS_ERR(handle)) | |
2792 | return PTR_ERR(handle); | |
2793 | ret = dquot_commit_info(sb, type); | |
2794 | err = ext3_journal_stop(handle); | |
2795 | if (!ret) | |
2796 | ret = err; | |
2797 | return ret; | |
2798 | } | |
2799 | ||
2800 | /* | |
2801 | * Turn on quotas during mount time - we need to find | |
2802 | * the quota file and such... | |
2803 | */ | |
2804 | static int ext3_quota_on_mount(struct super_block *sb, int type) | |
2805 | { | |
84de856e CH |
2806 | return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type], |
2807 | EXT3_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2808 | } |
2809 | ||
2810 | /* | |
2811 | * Standard function to be called on quota_on | |
2812 | */ | |
2813 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, | |
8264613d | 2814 | char *name, int remount) |
1da177e4 LT |
2815 | { |
2816 | int err; | |
8264613d | 2817 | struct path path; |
1da177e4 | 2818 | |
1f54587b JK |
2819 | if (!test_opt(sb, QUOTA)) |
2820 | return -EINVAL; | |
8264613d | 2821 | /* When remounting, no checks are needed and in fact, name is NULL */ |
9cfe7b90 | 2822 | if (remount) |
8264613d | 2823 | return vfs_quota_on(sb, type, format_id, name, remount); |
9cfe7b90 | 2824 | |
8264613d | 2825 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
1da177e4 LT |
2826 | if (err) |
2827 | return err; | |
9cfe7b90 | 2828 | |
1da177e4 | 2829 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
2830 | if (path.mnt->mnt_sb != sb) { |
2831 | path_put(&path); | |
1da177e4 LT |
2832 | return -EXDEV; |
2833 | } | |
9cfe7b90 JK |
2834 | /* Journaling quota? */ |
2835 | if (EXT3_SB(sb)->s_qf_names[type]) { | |
2836 | /* Quotafile not of fs root? */ | |
8264613d | 2837 | if (path.dentry->d_parent != sb->s_root) |
9cfe7b90 JK |
2838 | printk(KERN_WARNING |
2839 | "EXT3-fs: Quota file not on filesystem root. " | |
2840 | "Journaled quota will not work.\n"); | |
2841 | } | |
2842 | ||
2843 | /* | |
2844 | * When we journal data on quota file, we have to flush journal to see | |
2845 | * all updates to the file when we bypass pagecache... | |
2846 | */ | |
8264613d | 2847 | if (ext3_should_journal_data(path.dentry->d_inode)) { |
9cfe7b90 JK |
2848 | /* |
2849 | * We don't need to lock updates but journal_flush() could | |
2850 | * otherwise be livelocked... | |
2851 | */ | |
2852 | journal_lock_updates(EXT3_SB(sb)->s_journal); | |
2d7c820e | 2853 | err = journal_flush(EXT3_SB(sb)->s_journal); |
9cfe7b90 | 2854 | journal_unlock_updates(EXT3_SB(sb)->s_journal); |
2d7c820e | 2855 | if (err) { |
12e1ec9f | 2856 | path_put(&path); |
2d7c820e HK |
2857 | return err; |
2858 | } | |
9cfe7b90 JK |
2859 | } |
2860 | ||
8264613d AV |
2861 | err = vfs_quota_on_path(sb, type, format_id, &path); |
2862 | path_put(&path); | |
77e69dac | 2863 | return err; |
1da177e4 LT |
2864 | } |
2865 | ||
2866 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2867 | * acquiring the locks... As quota files are never truncated and quota code | |
2868 | * itself serializes the operations (and noone else should touch the files) | |
2869 | * we don't have to be afraid of races */ | |
2870 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
2871 | size_t len, loff_t off) | |
2872 | { | |
2873 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2874 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2875 | int err = 0; | |
2876 | int offset = off & (sb->s_blocksize - 1); | |
2877 | int tocopy; | |
2878 | size_t toread; | |
2879 | struct buffer_head *bh; | |
2880 | loff_t i_size = i_size_read(inode); | |
2881 | ||
2882 | if (off > i_size) | |
2883 | return 0; | |
2884 | if (off+len > i_size) | |
2885 | len = i_size-off; | |
2886 | toread = len; | |
2887 | while (toread > 0) { | |
2888 | tocopy = sb->s_blocksize - offset < toread ? | |
2889 | sb->s_blocksize - offset : toread; | |
2890 | bh = ext3_bread(NULL, inode, blk, 0, &err); | |
2891 | if (err) | |
2892 | return err; | |
2893 | if (!bh) /* A hole? */ | |
2894 | memset(data, 0, tocopy); | |
2895 | else | |
2896 | memcpy(data, bh->b_data+offset, tocopy); | |
2897 | brelse(bh); | |
2898 | offset = 0; | |
2899 | toread -= tocopy; | |
2900 | data += tocopy; | |
2901 | blk++; | |
2902 | } | |
2903 | return len; | |
2904 | } | |
2905 | ||
2906 | /* Write to quotafile (we know the transaction is already started and has | |
2907 | * enough credits) */ | |
2908 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
2909 | const char *data, size_t len, loff_t off) | |
2910 | { | |
2911 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2912 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2913 | int err = 0; | |
2914 | int offset = off & (sb->s_blocksize - 1); | |
2915 | int tocopy; | |
2916 | int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL; | |
2917 | size_t towrite = len; | |
2918 | struct buffer_head *bh; | |
2919 | handle_t *handle = journal_current_handle(); | |
2920 | ||
9c3013e9 JK |
2921 | if (!handle) { |
2922 | printk(KERN_WARNING "EXT3-fs: Quota write (off=%Lu, len=%Lu)" | |
2923 | " cancelled because transaction is not started.\n", | |
2924 | (unsigned long long)off, (unsigned long long)len); | |
2925 | return -EIO; | |
2926 | } | |
5c81a419 | 2927 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
1da177e4 LT |
2928 | while (towrite > 0) { |
2929 | tocopy = sb->s_blocksize - offset < towrite ? | |
2930 | sb->s_blocksize - offset : towrite; | |
2931 | bh = ext3_bread(handle, inode, blk, 1, &err); | |
2932 | if (!bh) | |
2933 | goto out; | |
2934 | if (journal_quota) { | |
2935 | err = ext3_journal_get_write_access(handle, bh); | |
2936 | if (err) { | |
2937 | brelse(bh); | |
2938 | goto out; | |
2939 | } | |
2940 | } | |
2941 | lock_buffer(bh); | |
2942 | memcpy(bh->b_data+offset, data, tocopy); | |
2943 | flush_dcache_page(bh->b_page); | |
2944 | unlock_buffer(bh); | |
2945 | if (journal_quota) | |
2946 | err = ext3_journal_dirty_metadata(handle, bh); | |
2947 | else { | |
2948 | /* Always do at least ordered writes for quotas */ | |
2949 | err = ext3_journal_dirty_data(handle, bh); | |
2950 | mark_buffer_dirty(bh); | |
2951 | } | |
2952 | brelse(bh); | |
2953 | if (err) | |
2954 | goto out; | |
2955 | offset = 0; | |
2956 | towrite -= tocopy; | |
2957 | data += tocopy; | |
2958 | blk++; | |
2959 | } | |
2960 | out: | |
f5c8f7da JK |
2961 | if (len == towrite) { |
2962 | mutex_unlock(&inode->i_mutex); | |
1da177e4 | 2963 | return err; |
f5c8f7da | 2964 | } |
1da177e4 LT |
2965 | if (inode->i_size < off+len-towrite) { |
2966 | i_size_write(inode, off+len-towrite); | |
2967 | EXT3_I(inode)->i_disksize = inode->i_size; | |
2968 | } | |
2969 | inode->i_version++; | |
2970 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2971 | ext3_mark_inode_dirty(handle, inode); | |
1b1dcc1b | 2972 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
2973 | return len - towrite; |
2974 | } | |
2975 | ||
2976 | #endif | |
2977 | ||
454e2398 DH |
2978 | static int ext3_get_sb(struct file_system_type *fs_type, |
2979 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 2980 | { |
454e2398 | 2981 | return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt); |
1da177e4 LT |
2982 | } |
2983 | ||
2984 | static struct file_system_type ext3_fs_type = { | |
2985 | .owner = THIS_MODULE, | |
2986 | .name = "ext3", | |
2987 | .get_sb = ext3_get_sb, | |
2988 | .kill_sb = kill_block_super, | |
2989 | .fs_flags = FS_REQUIRES_DEV, | |
2990 | }; | |
2991 | ||
2992 | static int __init init_ext3_fs(void) | |
2993 | { | |
2994 | int err = init_ext3_xattr(); | |
2995 | if (err) | |
2996 | return err; | |
2997 | err = init_inodecache(); | |
2998 | if (err) | |
2999 | goto out1; | |
3000 | err = register_filesystem(&ext3_fs_type); | |
3001 | if (err) | |
3002 | goto out; | |
3003 | return 0; | |
3004 | out: | |
3005 | destroy_inodecache(); | |
3006 | out1: | |
e9ad5620 | 3007 | exit_ext3_xattr(); |
1da177e4 LT |
3008 | return err; |
3009 | } | |
3010 | ||
3011 | static void __exit exit_ext3_fs(void) | |
3012 | { | |
3013 | unregister_filesystem(&ext3_fs_type); | |
3014 | destroy_inodecache(); | |
3015 | exit_ext3_xattr(); | |
3016 | } | |
3017 | ||
3018 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
3019 | MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions"); | |
3020 | MODULE_LICENSE("GPL"); | |
3021 | module_init(init_ext3_fs) | |
3022 | module_exit(exit_ext3_fs) |