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Commit | Line | Data |
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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> | |
1da177e4 | 30 | #include <linux/buffer_head.h> |
a5694255 | 31 | #include <linux/exportfs.h> |
1da177e4 LT |
32 | #include <linux/vfs.h> |
33 | #include <linux/random.h> | |
34 | #include <linux/mount.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/quotaops.h> | |
8fc2751b | 37 | #include <linux/seq_file.h> |
3fc74269 | 38 | #include <linux/log2.h> |
d71bc6db | 39 | #include <linux/cleancache.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 | ||
4cf46b67 AF |
138 | printk(KERN_ERR "EXT3-fs: %s: aborting transaction: %s in %s\n", |
139 | caller, errstr, err_fn); | |
1da177e4 LT |
140 | |
141 | journal_abort_handle(handle); | |
142 | } | |
143 | ||
4cf46b67 AF |
144 | void ext3_msg(struct super_block *sb, const char *prefix, |
145 | const char *fmt, ...) | |
146 | { | |
99fbb1e2 | 147 | struct va_format vaf; |
4cf46b67 AF |
148 | va_list args; |
149 | ||
150 | va_start(args, fmt); | |
99fbb1e2 JP |
151 | |
152 | vaf.fmt = fmt; | |
153 | vaf.va = &args; | |
154 | ||
155 | printk("%sEXT3-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
156 | ||
4cf46b67 AF |
157 | va_end(args); |
158 | } | |
159 | ||
1da177e4 LT |
160 | /* Deal with the reporting of failure conditions on a filesystem such as |
161 | * inconsistencies detected or read IO failures. | |
162 | * | |
163 | * On ext2, we can store the error state of the filesystem in the | |
164 | * superblock. That is not possible on ext3, because we may have other | |
165 | * write ordering constraints on the superblock which prevent us from | |
166 | * writing it out straight away; and given that the journal is about to | |
167 | * be aborted, we can't rely on the current, or future, transactions to | |
168 | * write out the superblock safely. | |
169 | * | |
170 | * We'll just use the journal_abort() error code to record an error in | |
d6b198bc | 171 | * the journal instead. On recovery, the journal will complain about |
1da177e4 LT |
172 | * that error until we've noted it down and cleared it. |
173 | */ | |
174 | ||
175 | static void ext3_handle_error(struct super_block *sb) | |
176 | { | |
177 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
178 | ||
179 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
180 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
181 | ||
182 | if (sb->s_flags & MS_RDONLY) | |
183 | return; | |
184 | ||
7543fc7b | 185 | if (!test_opt (sb, ERRORS_CONT)) { |
1da177e4 LT |
186 | journal_t *journal = EXT3_SB(sb)->s_journal; |
187 | ||
e3c96435 | 188 | set_opt(EXT3_SB(sb)->s_mount_opt, ABORT); |
1da177e4 LT |
189 | if (journal) |
190 | journal_abort(journal, -EIO); | |
191 | } | |
7543fc7b | 192 | if (test_opt (sb, ERRORS_RO)) { |
4cf46b67 AF |
193 | ext3_msg(sb, KERN_CRIT, |
194 | "error: remounting filesystem read-only"); | |
7543fc7b VA |
195 | sb->s_flags |= MS_RDONLY; |
196 | } | |
197 | ext3_commit_super(sb, es, 1); | |
1da177e4 | 198 | if (test_opt(sb, ERRORS_PANIC)) |
4cf46b67 | 199 | panic("EXT3-fs (%s): panic forced after error\n", |
1da177e4 | 200 | sb->s_id); |
1da177e4 LT |
201 | } |
202 | ||
99fbb1e2 JP |
203 | void ext3_error(struct super_block *sb, const char *function, |
204 | const char *fmt, ...) | |
1da177e4 | 205 | { |
99fbb1e2 | 206 | struct va_format vaf; |
1da177e4 LT |
207 | va_list args; |
208 | ||
209 | va_start(args, fmt); | |
99fbb1e2 JP |
210 | |
211 | vaf.fmt = fmt; | |
212 | vaf.va = &args; | |
213 | ||
214 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: %pV\n", | |
215 | sb->s_id, function, &vaf); | |
216 | ||
1da177e4 LT |
217 | va_end(args); |
218 | ||
219 | ext3_handle_error(sb); | |
220 | } | |
221 | ||
222 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
223 | char nbuf[16]) | |
224 | { | |
225 | char *errstr = NULL; | |
226 | ||
227 | switch (errno) { | |
228 | case -EIO: | |
229 | errstr = "IO failure"; | |
230 | break; | |
231 | case -ENOMEM: | |
232 | errstr = "Out of memory"; | |
233 | break; | |
234 | case -EROFS: | |
235 | if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT) | |
236 | errstr = "Journal has aborted"; | |
237 | else | |
238 | errstr = "Readonly filesystem"; | |
239 | break; | |
240 | default: | |
241 | /* If the caller passed in an extra buffer for unknown | |
242 | * errors, textualise them now. Else we just return | |
243 | * NULL. */ | |
244 | if (nbuf) { | |
245 | /* Check for truncated error codes... */ | |
246 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
247 | errstr = nbuf; | |
248 | } | |
249 | break; | |
250 | } | |
251 | ||
252 | return errstr; | |
253 | } | |
254 | ||
255 | /* __ext3_std_error decodes expected errors from journaling functions | |
256 | * automatically and invokes the appropriate error response. */ | |
257 | ||
258 | void __ext3_std_error (struct super_block * sb, const char * function, | |
259 | int errno) | |
260 | { | |
261 | char nbuf[16]; | |
30121624 | 262 | const char *errstr; |
1da177e4 | 263 | |
30121624 ST |
264 | /* Special case: if the error is EROFS, and we're not already |
265 | * inside a transaction, then there's really no point in logging | |
266 | * an error. */ | |
267 | if (errno == -EROFS && journal_current_handle() == NULL && | |
268 | (sb->s_flags & MS_RDONLY)) | |
269 | return; | |
270 | ||
271 | errstr = ext3_decode_error(sb, errno, nbuf); | |
4cf46b67 | 272 | ext3_msg(sb, KERN_CRIT, "error in %s: %s", function, errstr); |
1da177e4 LT |
273 | |
274 | ext3_handle_error(sb); | |
275 | } | |
276 | ||
277 | /* | |
278 | * ext3_abort is a much stronger failure handler than ext3_error. The | |
279 | * abort function may be used to deal with unrecoverable failures such | |
280 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
281 | * | |
282 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
283 | * unless the error response on the fs has been set to panic in which | |
284 | * case we take the easy way out and panic immediately. | |
285 | */ | |
286 | ||
99fbb1e2 JP |
287 | void ext3_abort(struct super_block *sb, const char *function, |
288 | const char *fmt, ...) | |
1da177e4 | 289 | { |
99fbb1e2 | 290 | struct va_format vaf; |
1da177e4 LT |
291 | va_list args; |
292 | ||
1da177e4 | 293 | va_start(args, fmt); |
99fbb1e2 JP |
294 | |
295 | vaf.fmt = fmt; | |
296 | vaf.va = &args; | |
297 | ||
298 | printk(KERN_CRIT "EXT3-fs (%s): error: %s: %pV\n", | |
299 | sb->s_id, function, &vaf); | |
300 | ||
1da177e4 LT |
301 | va_end(args); |
302 | ||
303 | if (test_opt(sb, ERRORS_PANIC)) | |
4cf46b67 | 304 | panic("EXT3-fs: panic from previous error\n"); |
1da177e4 LT |
305 | |
306 | if (sb->s_flags & MS_RDONLY) | |
307 | return; | |
308 | ||
4cf46b67 AF |
309 | ext3_msg(sb, KERN_CRIT, |
310 | "error: remounting filesystem read-only"); | |
1da177e4 LT |
311 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; |
312 | sb->s_flags |= MS_RDONLY; | |
e3c96435 | 313 | set_opt(EXT3_SB(sb)->s_mount_opt, ABORT); |
44d6f787 HK |
314 | if (EXT3_SB(sb)->s_journal) |
315 | journal_abort(EXT3_SB(sb)->s_journal, -EIO); | |
1da177e4 LT |
316 | } |
317 | ||
99fbb1e2 JP |
318 | void ext3_warning(struct super_block *sb, const char *function, |
319 | const char *fmt, ...) | |
1da177e4 | 320 | { |
99fbb1e2 | 321 | struct va_format vaf; |
1da177e4 LT |
322 | va_list args; |
323 | ||
324 | va_start(args, fmt); | |
99fbb1e2 JP |
325 | |
326 | vaf.fmt = fmt; | |
327 | vaf.va = &args; | |
328 | ||
329 | printk(KERN_WARNING "EXT3-fs (%s): warning: %s: %pV\n", | |
330 | sb->s_id, function, &vaf); | |
331 | ||
1da177e4 LT |
332 | va_end(args); |
333 | } | |
334 | ||
335 | void ext3_update_dynamic_rev(struct super_block *sb) | |
336 | { | |
337 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
338 | ||
339 | if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV) | |
340 | return; | |
341 | ||
4cf46b67 AF |
342 | ext3_msg(sb, KERN_WARNING, |
343 | "warning: updating to rev %d because of " | |
344 | "new feature flag, running e2fsck is recommended", | |
345 | EXT3_DYNAMIC_REV); | |
1da177e4 LT |
346 | |
347 | es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO); | |
348 | es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE); | |
349 | es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV); | |
350 | /* leave es->s_feature_*compat flags alone */ | |
351 | /* es->s_uuid will be set by e2fsck if empty */ | |
352 | ||
353 | /* | |
354 | * The rest of the superblock fields should be zero, and if not it | |
355 | * means they are likely already in use, so leave them alone. We | |
356 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
357 | */ | |
358 | } | |
359 | ||
360 | /* | |
361 | * Open the external journal device | |
362 | */ | |
4cf46b67 | 363 | static struct block_device *ext3_blkdev_get(dev_t dev, struct super_block *sb) |
1da177e4 LT |
364 | { |
365 | struct block_device *bdev; | |
366 | char b[BDEVNAME_SIZE]; | |
367 | ||
d4d77629 | 368 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
1da177e4 LT |
369 | if (IS_ERR(bdev)) |
370 | goto fail; | |
371 | return bdev; | |
372 | ||
373 | fail: | |
4cf46b67 AF |
374 | ext3_msg(sb, "error: failed to open journal device %s: %ld", |
375 | __bdevname(dev, b), PTR_ERR(bdev)); | |
376 | ||
1da177e4 LT |
377 | return NULL; |
378 | } | |
379 | ||
380 | /* | |
381 | * Release the journal device | |
382 | */ | |
383 | static int ext3_blkdev_put(struct block_device *bdev) | |
384 | { | |
e525fd89 | 385 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
386 | } |
387 | ||
388 | static int ext3_blkdev_remove(struct ext3_sb_info *sbi) | |
389 | { | |
390 | struct block_device *bdev; | |
391 | int ret = -ENODEV; | |
392 | ||
393 | bdev = sbi->journal_bdev; | |
394 | if (bdev) { | |
395 | ret = ext3_blkdev_put(bdev); | |
396 | sbi->journal_bdev = NULL; | |
397 | } | |
398 | return ret; | |
399 | } | |
400 | ||
401 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
402 | { | |
403 | return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode; | |
404 | } | |
405 | ||
406 | static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi) | |
407 | { | |
408 | struct list_head *l; | |
409 | ||
4cf46b67 | 410 | ext3_msg(sb, KERN_ERR, "error: sb orphan head is %d", |
1da177e4 LT |
411 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
412 | ||
4cf46b67 | 413 | ext3_msg(sb, KERN_ERR, "sb_info orphan list:"); |
1da177e4 LT |
414 | list_for_each(l, &sbi->s_orphan) { |
415 | struct inode *inode = orphan_list_entry(l); | |
4cf46b67 | 416 | ext3_msg(sb, KERN_ERR, " " |
eee194e7 | 417 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
1da177e4 | 418 | inode->i_sb->s_id, inode->i_ino, inode, |
ae6ddcc5 | 419 | inode->i_mode, inode->i_nlink, |
1da177e4 LT |
420 | NEXT_ORPHAN(inode)); |
421 | } | |
422 | } | |
423 | ||
424 | static void ext3_put_super (struct super_block * sb) | |
425 | { | |
426 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
427 | struct ext3_super_block *es = sbi->s_es; | |
44d6f787 | 428 | int i, err; |
1da177e4 | 429 | |
e0ccfd95 | 430 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
1da177e4 | 431 | ext3_xattr_put_super(sb); |
44d6f787 HK |
432 | err = journal_destroy(sbi->s_journal); |
433 | sbi->s_journal = NULL; | |
434 | if (err < 0) | |
2d7c820e | 435 | ext3_abort(sb, __func__, "Couldn't clean up the journal"); |
44d6f787 | 436 | |
1da177e4 LT |
437 | if (!(sb->s_flags & MS_RDONLY)) { |
438 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
439 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
440 | BUFFER_TRACE(sbi->s_sbh, "marking dirty"); | |
441 | mark_buffer_dirty(sbi->s_sbh); | |
442 | ext3_commit_super(sb, es, 1); | |
443 | } | |
444 | ||
445 | for (i = 0; i < sbi->s_gdb_count; i++) | |
446 | brelse(sbi->s_group_desc[i]); | |
447 | kfree(sbi->s_group_desc); | |
448 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
449 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
450 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
451 | brelse(sbi->s_sbh); | |
452 | #ifdef CONFIG_QUOTA | |
453 | for (i = 0; i < MAXQUOTAS; i++) | |
454 | kfree(sbi->s_qf_names[i]); | |
455 | #endif | |
456 | ||
457 | /* Debugging code just in case the in-memory inode orphan list | |
458 | * isn't empty. The on-disk one can be non-empty if we've | |
459 | * detected an error and taken the fs readonly, but the | |
460 | * in-memory list had better be clean by this point. */ | |
461 | if (!list_empty(&sbi->s_orphan)) | |
462 | dump_orphan_list(sb, sbi); | |
463 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
464 | ||
f98393a6 | 465 | invalidate_bdev(sb->s_bdev); |
1da177e4 LT |
466 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
467 | /* | |
468 | * Invalidate the journal device's buffers. We don't want them | |
469 | * floating about in memory - the physical journal device may | |
470 | * hotswapped, and it breaks the `ro-after' testing code. | |
471 | */ | |
472 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 473 | invalidate_bdev(sbi->journal_bdev); |
1da177e4 LT |
474 | ext3_blkdev_remove(sbi); |
475 | } | |
476 | sb->s_fs_info = NULL; | |
5df096d6 | 477 | kfree(sbi->s_blockgroup_lock); |
1da177e4 | 478 | kfree(sbi); |
1da177e4 LT |
479 | } |
480 | ||
e18b890b | 481 | static struct kmem_cache *ext3_inode_cachep; |
1da177e4 LT |
482 | |
483 | /* | |
484 | * Called inside transaction, so use GFP_NOFS | |
485 | */ | |
486 | static struct inode *ext3_alloc_inode(struct super_block *sb) | |
487 | { | |
488 | struct ext3_inode_info *ei; | |
489 | ||
e6b4f8da | 490 | ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS); |
1da177e4 LT |
491 | if (!ei) |
492 | return NULL; | |
1da177e4 LT |
493 | ei->i_block_alloc_info = NULL; |
494 | ei->vfs_inode.i_version = 1; | |
fe8bc91c JK |
495 | atomic_set(&ei->i_datasync_tid, 0); |
496 | atomic_set(&ei->i_sync_tid, 0); | |
1da177e4 LT |
497 | return &ei->vfs_inode; |
498 | } | |
499 | ||
fa0d7e3d NP |
500 | static void ext3_i_callback(struct rcu_head *head) |
501 | { | |
502 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
503 | INIT_LIST_HEAD(&inode->i_dentry); | |
504 | kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); | |
505 | } | |
506 | ||
1da177e4 LT |
507 | static void ext3_destroy_inode(struct inode *inode) |
508 | { | |
9f7dd93d VA |
509 | if (!list_empty(&(EXT3_I(inode)->i_orphan))) { |
510 | printk("EXT3 Inode %p: orphan list check failed!\n", | |
511 | EXT3_I(inode)); | |
512 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
513 | EXT3_I(inode), sizeof(struct ext3_inode_info), | |
514 | false); | |
515 | dump_stack(); | |
516 | } | |
fa0d7e3d | 517 | call_rcu(&inode->i_rcu, ext3_i_callback); |
1da177e4 LT |
518 | } |
519 | ||
51cc5068 | 520 | static void init_once(void *foo) |
1da177e4 LT |
521 | { |
522 | struct ext3_inode_info *ei = (struct ext3_inode_info *) foo; | |
523 | ||
a35afb83 | 524 | INIT_LIST_HEAD(&ei->i_orphan); |
1da177e4 | 525 | #ifdef CONFIG_EXT3_FS_XATTR |
a35afb83 | 526 | init_rwsem(&ei->xattr_sem); |
1da177e4 | 527 | #endif |
a35afb83 CL |
528 | mutex_init(&ei->truncate_mutex); |
529 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 530 | } |
ae6ddcc5 | 531 | |
1da177e4 LT |
532 | static int init_inodecache(void) |
533 | { | |
534 | ext3_inode_cachep = kmem_cache_create("ext3_inode_cache", | |
535 | sizeof(struct ext3_inode_info), | |
fffb60f9 PJ |
536 | 0, (SLAB_RECLAIM_ACCOUNT| |
537 | SLAB_MEM_SPREAD), | |
20c2df83 | 538 | init_once); |
1da177e4 LT |
539 | if (ext3_inode_cachep == NULL) |
540 | return -ENOMEM; | |
541 | return 0; | |
542 | } | |
543 | ||
544 | static void destroy_inodecache(void) | |
545 | { | |
1a1d92c1 | 546 | kmem_cache_destroy(ext3_inode_cachep); |
1da177e4 LT |
547 | } |
548 | ||
6cd37cda | 549 | static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) |
8fc2751b | 550 | { |
6cd37cda | 551 | #if defined(CONFIG_QUOTA) |
275abf5b | 552 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
8fc2751b | 553 | |
1aeec434 JK |
554 | if (sbi->s_jquota_fmt) { |
555 | char *fmtname = ""; | |
556 | ||
557 | switch (sbi->s_jquota_fmt) { | |
558 | case QFMT_VFS_OLD: | |
559 | fmtname = "vfsold"; | |
560 | break; | |
561 | case QFMT_VFS_V0: | |
562 | fmtname = "vfsv0"; | |
563 | break; | |
564 | case QFMT_VFS_V1: | |
565 | fmtname = "vfsv1"; | |
566 | break; | |
567 | } | |
568 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
569 | } | |
8fc2751b MB |
570 | |
571 | if (sbi->s_qf_names[USRQUOTA]) | |
572 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
573 | ||
574 | if (sbi->s_qf_names[GRPQUOTA]) | |
575 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
576 | ||
e3c96435 | 577 | if (test_opt(sb, USRQUOTA)) |
8fc2751b MB |
578 | seq_puts(seq, ",usrquota"); |
579 | ||
e3c96435 | 580 | if (test_opt(sb, GRPQUOTA)) |
8fc2751b MB |
581 | seq_puts(seq, ",grpquota"); |
582 | #endif | |
6cd37cda PO |
583 | } |
584 | ||
3c4cec65 JK |
585 | static char *data_mode_string(unsigned long mode) |
586 | { | |
587 | switch (mode) { | |
588 | case EXT3_MOUNT_JOURNAL_DATA: | |
589 | return "journal"; | |
590 | case EXT3_MOUNT_ORDERED_DATA: | |
591 | return "ordered"; | |
592 | case EXT3_MOUNT_WRITEBACK_DATA: | |
593 | return "writeback"; | |
594 | } | |
595 | return "unknown"; | |
596 | } | |
597 | ||
571beed8 MS |
598 | /* |
599 | * Show an option if | |
600 | * - it's set to a non-default value OR | |
601 | * - if the per-sb default is different from the global default | |
602 | */ | |
6cd37cda PO |
603 | static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) |
604 | { | |
605 | struct super_block *sb = vfs->mnt_sb; | |
571beed8 MS |
606 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
607 | struct ext3_super_block *es = sbi->s_es; | |
608 | unsigned long def_mount_opts; | |
609 | ||
610 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
611 | ||
612 | if (sbi->s_sb_block != 1) | |
613 | seq_printf(seq, ",sb=%lu", sbi->s_sb_block); | |
614 | if (test_opt(sb, MINIX_DF)) | |
615 | seq_puts(seq, ",minixdf"); | |
616 | if (test_opt(sb, GRPID)) | |
617 | seq_puts(seq, ",grpid"); | |
618 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS)) | |
619 | seq_puts(seq, ",nogrpid"); | |
620 | if (sbi->s_resuid != EXT3_DEF_RESUID || | |
621 | le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) { | |
622 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
623 | } | |
624 | if (sbi->s_resgid != EXT3_DEF_RESGID || | |
625 | le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) { | |
626 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
627 | } | |
1eca93f9 | 628 | if (test_opt(sb, ERRORS_RO)) { |
571beed8 MS |
629 | int def_errors = le16_to_cpu(es->s_errors); |
630 | ||
631 | if (def_errors == EXT3_ERRORS_PANIC || | |
1eca93f9 AK |
632 | def_errors == EXT3_ERRORS_CONTINUE) { |
633 | seq_puts(seq, ",errors=remount-ro"); | |
571beed8 MS |
634 | } |
635 | } | |
1eca93f9 AK |
636 | if (test_opt(sb, ERRORS_CONT)) |
637 | seq_puts(seq, ",errors=continue"); | |
571beed8 MS |
638 | if (test_opt(sb, ERRORS_PANIC)) |
639 | seq_puts(seq, ",errors=panic"); | |
640 | if (test_opt(sb, NO_UID32)) | |
641 | seq_puts(seq, ",nouid32"); | |
642 | if (test_opt(sb, DEBUG)) | |
643 | seq_puts(seq, ",debug"); | |
644 | if (test_opt(sb, OLDALLOC)) | |
645 | seq_puts(seq, ",oldalloc"); | |
646 | #ifdef CONFIG_EXT3_FS_XATTR | |
647 | if (test_opt(sb, XATTR_USER)) | |
648 | seq_puts(seq, ",user_xattr"); | |
649 | if (!test_opt(sb, XATTR_USER) && | |
650 | (def_mount_opts & EXT3_DEFM_XATTR_USER)) { | |
651 | seq_puts(seq, ",nouser_xattr"); | |
652 | } | |
653 | #endif | |
654 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
655 | if (test_opt(sb, POSIX_ACL)) | |
656 | seq_puts(seq, ",acl"); | |
657 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL)) | |
658 | seq_puts(seq, ",noacl"); | |
659 | #endif | |
660 | if (!test_opt(sb, RESERVATION)) | |
661 | seq_puts(seq, ",noreservation"); | |
662 | if (sbi->s_commit_interval) { | |
663 | seq_printf(seq, ",commit=%u", | |
664 | (unsigned) (sbi->s_commit_interval / HZ)); | |
665 | } | |
0636c73e ES |
666 | |
667 | /* | |
668 | * Always display barrier state so it's clear what the status is. | |
669 | */ | |
670 | seq_puts(seq, ",barrier="); | |
671 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
e3c96435 | 672 | seq_printf(seq, ",data=%s", data_mode_string(test_opt(sb, DATA_FLAGS))); |
0e4fb5e2 HK |
673 | if (test_opt(sb, DATA_ERR_ABORT)) |
674 | seq_puts(seq, ",data_err=abort"); | |
675 | ||
dee1d3b6 ES |
676 | if (test_opt(sb, NOLOAD)) |
677 | seq_puts(seq, ",norecovery"); | |
678 | ||
6cd37cda | 679 | ext3_show_quota_options(seq, sb); |
8fc2751b MB |
680 | |
681 | return 0; | |
682 | } | |
1da177e4 | 683 | |
fdb36673 | 684 | |
74af0baa CH |
685 | static struct inode *ext3_nfs_get_inode(struct super_block *sb, |
686 | u64 ino, u32 generation) | |
fdb36673 | 687 | { |
fdb36673 | 688 | struct inode *inode; |
fdb36673 N |
689 | |
690 | if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO) | |
691 | return ERR_PTR(-ESTALE); | |
692 | if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) | |
693 | return ERR_PTR(-ESTALE); | |
694 | ||
695 | /* iget isn't really right if the inode is currently unallocated!! | |
696 | * | |
697 | * ext3_read_inode will return a bad_inode if the inode had been | |
698 | * deleted, so we should be safe. | |
699 | * | |
700 | * Currently we don't know the generation for parent directory, so | |
701 | * a generation of 0 means "accept any" | |
702 | */ | |
473043dc DH |
703 | inode = ext3_iget(sb, ino); |
704 | if (IS_ERR(inode)) | |
705 | return ERR_CAST(inode); | |
706 | if (generation && inode->i_generation != generation) { | |
fdb36673 N |
707 | iput(inode); |
708 | return ERR_PTR(-ESTALE); | |
709 | } | |
74af0baa CH |
710 | |
711 | return inode; | |
712 | } | |
713 | ||
714 | static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
715 | int fh_len, int fh_type) | |
716 | { | |
717 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
718 | ext3_nfs_get_inode); | |
719 | } | |
720 | ||
721 | static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid, | |
722 | int fh_len, int fh_type) | |
723 | { | |
724 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
725 | ext3_nfs_get_inode); | |
fdb36673 N |
726 | } |
727 | ||
6b082b53 TO |
728 | /* |
729 | * Try to release metadata pages (indirect blocks, directories) which are | |
730 | * mapped via the block device. Since these pages could have journal heads | |
731 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
732 | * jbd layer's try_to_free_buffers() function to release them. | |
733 | */ | |
734 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, | |
735 | gfp_t wait) | |
736 | { | |
737 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
738 | ||
739 | WARN_ON(PageChecked(page)); | |
740 | if (!page_has_buffers(page)) | |
741 | return 0; | |
742 | if (journal) | |
743 | return journal_try_to_free_buffers(journal, page, | |
744 | wait & ~__GFP_WAIT); | |
745 | return try_to_free_buffers(page); | |
746 | } | |
747 | ||
8fc2751b | 748 | #ifdef CONFIG_QUOTA |
1da177e4 LT |
749 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
750 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) | |
751 | ||
1da177e4 LT |
752 | static int ext3_write_dquot(struct dquot *dquot); |
753 | static int ext3_acquire_dquot(struct dquot *dquot); | |
754 | static int ext3_release_dquot(struct dquot *dquot); | |
755 | static int ext3_mark_dquot_dirty(struct dquot *dquot); | |
756 | static int ext3_write_info(struct super_block *sb, int type); | |
2fd83a4f | 757 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 758 | struct path *path); |
1da177e4 LT |
759 | static int ext3_quota_on_mount(struct super_block *sb, int type); |
760 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
761 | size_t len, loff_t off); | |
762 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
763 | const char *data, size_t len, loff_t off); | |
764 | ||
61e225dc | 765 | static const struct dquot_operations ext3_quota_operations = { |
1da177e4 LT |
766 | .write_dquot = ext3_write_dquot, |
767 | .acquire_dquot = ext3_acquire_dquot, | |
768 | .release_dquot = ext3_release_dquot, | |
769 | .mark_dirty = ext3_mark_dquot_dirty, | |
157091a2 JK |
770 | .write_info = ext3_write_info, |
771 | .alloc_dquot = dquot_alloc, | |
772 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
773 | }; |
774 | ||
0d54b217 | 775 | static const struct quotactl_ops ext3_qctl_operations = { |
1da177e4 | 776 | .quota_on = ext3_quota_on, |
287a8095 CH |
777 | .quota_off = dquot_quota_off, |
778 | .quota_sync = dquot_quota_sync, | |
779 | .get_info = dquot_get_dqinfo, | |
780 | .set_info = dquot_set_dqinfo, | |
781 | .get_dqblk = dquot_get_dqblk, | |
782 | .set_dqblk = dquot_set_dqblk | |
1da177e4 LT |
783 | }; |
784 | #endif | |
785 | ||
ee9b6d61 | 786 | static const struct super_operations ext3_sops = { |
1da177e4 LT |
787 | .alloc_inode = ext3_alloc_inode, |
788 | .destroy_inode = ext3_destroy_inode, | |
1da177e4 LT |
789 | .write_inode = ext3_write_inode, |
790 | .dirty_inode = ext3_dirty_inode, | |
ac14a95b | 791 | .evict_inode = ext3_evict_inode, |
1da177e4 | 792 | .put_super = ext3_put_super, |
1da177e4 | 793 | .sync_fs = ext3_sync_fs, |
c4be0c1d TS |
794 | .freeze_fs = ext3_freeze, |
795 | .unfreeze_fs = ext3_unfreeze, | |
1da177e4 LT |
796 | .statfs = ext3_statfs, |
797 | .remount_fs = ext3_remount, | |
8fc2751b | 798 | .show_options = ext3_show_options, |
1da177e4 LT |
799 | #ifdef CONFIG_QUOTA |
800 | .quota_read = ext3_quota_read, | |
801 | .quota_write = ext3_quota_write, | |
802 | #endif | |
6b082b53 | 803 | .bdev_try_to_free_page = bdev_try_to_free_page, |
1da177e4 LT |
804 | }; |
805 | ||
39655164 | 806 | static const struct export_operations ext3_export_ops = { |
74af0baa CH |
807 | .fh_to_dentry = ext3_fh_to_dentry, |
808 | .fh_to_parent = ext3_fh_to_parent, | |
1da177e4 LT |
809 | .get_parent = ext3_get_parent, |
810 | }; | |
811 | ||
812 | enum { | |
813 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
814 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
2860b733 | 815 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, |
1da177e4 | 816 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
ade1a29e | 817 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, |
71b96257 | 818 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, |
1da177e4 | 819 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
0e4fb5e2 | 820 | Opt_data_err_abort, Opt_data_err_ignore, |
1da177e4 | 821 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1aeec434 | 822 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
0636c73e ES |
823 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, |
824 | Opt_resize, Opt_usrquota, Opt_grpquota | |
1da177e4 LT |
825 | }; |
826 | ||
a447c093 | 827 | static const match_table_t tokens = { |
1da177e4 LT |
828 | {Opt_bsd_df, "bsddf"}, |
829 | {Opt_minix_df, "minixdf"}, | |
830 | {Opt_grpid, "grpid"}, | |
831 | {Opt_grpid, "bsdgroups"}, | |
832 | {Opt_nogrpid, "nogrpid"}, | |
833 | {Opt_nogrpid, "sysvgroups"}, | |
834 | {Opt_resgid, "resgid=%u"}, | |
835 | {Opt_resuid, "resuid=%u"}, | |
836 | {Opt_sb, "sb=%u"}, | |
837 | {Opt_err_cont, "errors=continue"}, | |
838 | {Opt_err_panic, "errors=panic"}, | |
839 | {Opt_err_ro, "errors=remount-ro"}, | |
840 | {Opt_nouid32, "nouid32"}, | |
841 | {Opt_nocheck, "nocheck"}, | |
842 | {Opt_nocheck, "check=none"}, | |
1da177e4 LT |
843 | {Opt_debug, "debug"}, |
844 | {Opt_oldalloc, "oldalloc"}, | |
845 | {Opt_orlov, "orlov"}, | |
846 | {Opt_user_xattr, "user_xattr"}, | |
847 | {Opt_nouser_xattr, "nouser_xattr"}, | |
848 | {Opt_acl, "acl"}, | |
849 | {Opt_noacl, "noacl"}, | |
850 | {Opt_reservation, "reservation"}, | |
851 | {Opt_noreservation, "noreservation"}, | |
852 | {Opt_noload, "noload"}, | |
dee1d3b6 | 853 | {Opt_noload, "norecovery"}, |
1da177e4 | 854 | {Opt_nobh, "nobh"}, |
ade1a29e | 855 | {Opt_bh, "bh"}, |
1da177e4 LT |
856 | {Opt_commit, "commit=%u"}, |
857 | {Opt_journal_update, "journal=update"}, | |
858 | {Opt_journal_inum, "journal=%u"}, | |
71b96257 | 859 | {Opt_journal_dev, "journal_dev=%u"}, |
1da177e4 LT |
860 | {Opt_abort, "abort"}, |
861 | {Opt_data_journal, "data=journal"}, | |
862 | {Opt_data_ordered, "data=ordered"}, | |
863 | {Opt_data_writeback, "data=writeback"}, | |
0e4fb5e2 HK |
864 | {Opt_data_err_abort, "data_err=abort"}, |
865 | {Opt_data_err_ignore, "data_err=ignore"}, | |
1da177e4 LT |
866 | {Opt_offusrjquota, "usrjquota="}, |
867 | {Opt_usrjquota, "usrjquota=%s"}, | |
868 | {Opt_offgrpjquota, "grpjquota="}, | |
869 | {Opt_grpjquota, "grpjquota=%s"}, | |
870 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
871 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1aeec434 | 872 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
8fc2751b | 873 | {Opt_grpquota, "grpquota"}, |
1f54587b JK |
874 | {Opt_noquota, "noquota"}, |
875 | {Opt_quota, "quota"}, | |
8fc2751b | 876 | {Opt_usrquota, "usrquota"}, |
1da177e4 | 877 | {Opt_barrier, "barrier=%u"}, |
0636c73e ES |
878 | {Opt_barrier, "barrier"}, |
879 | {Opt_nobarrier, "nobarrier"}, | |
1da177e4 | 880 | {Opt_resize, "resize"}, |
92587216 | 881 | {Opt_err, NULL}, |
1da177e4 LT |
882 | }; |
883 | ||
4cf46b67 | 884 | static ext3_fsblk_t get_sb_block(void **data, struct super_block *sb) |
1da177e4 | 885 | { |
e9ad5620 DK |
886 | ext3_fsblk_t sb_block; |
887 | char *options = (char *) *data; | |
1da177e4 LT |
888 | |
889 | if (!options || strncmp(options, "sb=", 3) != 0) | |
890 | return 1; /* Default location */ | |
891 | options += 3; | |
43d23f90 | 892 | /*todo: use simple_strtoll with >32bit ext3 */ |
1da177e4 LT |
893 | sb_block = simple_strtoul(options, &options, 0); |
894 | if (*options && *options != ',') { | |
4cf46b67 | 895 | ext3_msg(sb, "error: invalid sb specification: %s", |
1da177e4 LT |
896 | (char *) *data); |
897 | return 1; | |
898 | } | |
899 | if (*options == ',') | |
900 | options++; | |
901 | *data = (void *) options; | |
902 | return sb_block; | |
903 | } | |
904 | ||
e1f5c67a DM |
905 | #ifdef CONFIG_QUOTA |
906 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
907 | { | |
908 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
909 | char *qname; | |
910 | ||
911 | if (sb_any_quota_loaded(sb) && | |
912 | !sbi->s_qf_names[qtype]) { | |
913 | ext3_msg(sb, KERN_ERR, | |
914 | "Cannot change journaled " | |
915 | "quota options when quota turned on"); | |
916 | return 0; | |
917 | } | |
918 | qname = match_strdup(args); | |
919 | if (!qname) { | |
920 | ext3_msg(sb, KERN_ERR, | |
921 | "Not enough memory for storing quotafile name"); | |
922 | return 0; | |
923 | } | |
924 | if (sbi->s_qf_names[qtype] && | |
925 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
926 | ext3_msg(sb, KERN_ERR, | |
927 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
928 | kfree(qname); | |
929 | return 0; | |
930 | } | |
931 | sbi->s_qf_names[qtype] = qname; | |
932 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
933 | ext3_msg(sb, KERN_ERR, | |
934 | "quotafile must be on filesystem root"); | |
935 | kfree(sbi->s_qf_names[qtype]); | |
936 | sbi->s_qf_names[qtype] = NULL; | |
937 | return 0; | |
938 | } | |
939 | set_opt(sbi->s_mount_opt, QUOTA); | |
940 | return 1; | |
941 | } | |
942 | ||
943 | static int clear_qf_name(struct super_block *sb, int qtype) { | |
944 | ||
945 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
946 | ||
947 | if (sb_any_quota_loaded(sb) && | |
948 | sbi->s_qf_names[qtype]) { | |
949 | ext3_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
950 | " when quota turned on"); | |
951 | return 0; | |
952 | } | |
953 | /* | |
954 | * The space will be released later when all options are confirmed | |
955 | * to be correct | |
956 | */ | |
957 | sbi->s_qf_names[qtype] = NULL; | |
958 | return 1; | |
959 | } | |
960 | #endif | |
961 | ||
71b96257 | 962 | static int parse_options (char *options, struct super_block *sb, |
eee194e7 | 963 | unsigned int *inum, unsigned long *journal_devnum, |
43d23f90 | 964 | ext3_fsblk_t *n_blocks_count, int is_remount) |
1da177e4 LT |
965 | { |
966 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
967 | char * p; | |
968 | substring_t args[MAX_OPT_ARGS]; | |
969 | int data_opt = 0; | |
970 | int option; | |
971 | #ifdef CONFIG_QUOTA | |
e1f5c67a | 972 | int qfmt; |
1da177e4 LT |
973 | #endif |
974 | ||
975 | if (!options) | |
976 | return 1; | |
977 | ||
978 | while ((p = strsep (&options, ",")) != NULL) { | |
979 | int token; | |
980 | if (!*p) | |
981 | continue; | |
0636c73e ES |
982 | /* |
983 | * Initialize args struct so we know whether arg was | |
984 | * found; some options take optional arguments. | |
985 | */ | |
986 | args[0].to = args[0].from = 0; | |
1da177e4 LT |
987 | token = match_token(p, tokens, args); |
988 | switch (token) { | |
989 | case Opt_bsd_df: | |
990 | clear_opt (sbi->s_mount_opt, MINIX_DF); | |
991 | break; | |
992 | case Opt_minix_df: | |
993 | set_opt (sbi->s_mount_opt, MINIX_DF); | |
994 | break; | |
995 | case Opt_grpid: | |
996 | set_opt (sbi->s_mount_opt, GRPID); | |
997 | break; | |
998 | case Opt_nogrpid: | |
999 | clear_opt (sbi->s_mount_opt, GRPID); | |
1000 | break; | |
1001 | case Opt_resuid: | |
1002 | if (match_int(&args[0], &option)) | |
1003 | return 0; | |
1004 | sbi->s_resuid = option; | |
1005 | break; | |
1006 | case Opt_resgid: | |
1007 | if (match_int(&args[0], &option)) | |
1008 | return 0; | |
1009 | sbi->s_resgid = option; | |
1010 | break; | |
1011 | case Opt_sb: | |
1012 | /* handled by get_sb_block() instead of here */ | |
1013 | /* *sb_block = match_int(&args[0]); */ | |
1014 | break; | |
1015 | case Opt_err_panic: | |
1016 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1017 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
1018 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1019 | break; | |
1020 | case Opt_err_ro: | |
1021 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1022 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1023 | set_opt (sbi->s_mount_opt, ERRORS_RO); | |
1024 | break; | |
1025 | case Opt_err_cont: | |
1026 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
1027 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1028 | set_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1029 | break; | |
1030 | case Opt_nouid32: | |
1031 | set_opt (sbi->s_mount_opt, NO_UID32); | |
1032 | break; | |
1da177e4 LT |
1033 | case Opt_nocheck: |
1034 | clear_opt (sbi->s_mount_opt, CHECK); | |
1035 | break; | |
1036 | case Opt_debug: | |
1037 | set_opt (sbi->s_mount_opt, DEBUG); | |
1038 | break; | |
1039 | case Opt_oldalloc: | |
1040 | set_opt (sbi->s_mount_opt, OLDALLOC); | |
1041 | break; | |
1042 | case Opt_orlov: | |
1043 | clear_opt (sbi->s_mount_opt, OLDALLOC); | |
1044 | break; | |
1045 | #ifdef CONFIG_EXT3_FS_XATTR | |
1046 | case Opt_user_xattr: | |
1047 | set_opt (sbi->s_mount_opt, XATTR_USER); | |
1048 | break; | |
1049 | case Opt_nouser_xattr: | |
1050 | clear_opt (sbi->s_mount_opt, XATTR_USER); | |
1051 | break; | |
1052 | #else | |
1053 | case Opt_user_xattr: | |
1054 | case Opt_nouser_xattr: | |
4cf46b67 AF |
1055 | ext3_msg(sb, KERN_INFO, |
1056 | "(no)user_xattr options not supported"); | |
1da177e4 LT |
1057 | break; |
1058 | #endif | |
1059 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1060 | case Opt_acl: | |
1061 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1062 | break; | |
1063 | case Opt_noacl: | |
1064 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1065 | break; | |
1066 | #else | |
1067 | case Opt_acl: | |
1068 | case Opt_noacl: | |
4cf46b67 AF |
1069 | ext3_msg(sb, KERN_INFO, |
1070 | "(no)acl options not supported"); | |
1da177e4 LT |
1071 | break; |
1072 | #endif | |
1073 | case Opt_reservation: | |
1074 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1075 | break; | |
1076 | case Opt_noreservation: | |
1077 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
1078 | break; | |
1079 | case Opt_journal_update: | |
1080 | /* @@@ FIXME */ | |
1081 | /* Eventually we will want to be able to create | |
1082 | a journal file here. For now, only allow the | |
1083 | user to specify an existing inode to be the | |
1084 | journal file. */ | |
1085 | if (is_remount) { | |
4cf46b67 AF |
1086 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1087 | "journal on remount"); | |
1da177e4 LT |
1088 | return 0; |
1089 | } | |
1090 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); | |
1091 | break; | |
1092 | case Opt_journal_inum: | |
1093 | if (is_remount) { | |
4cf46b67 AF |
1094 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1095 | "journal on remount"); | |
1da177e4 LT |
1096 | return 0; |
1097 | } | |
1098 | if (match_int(&args[0], &option)) | |
1099 | return 0; | |
1100 | *inum = option; | |
1101 | break; | |
71b96257 JL |
1102 | case Opt_journal_dev: |
1103 | if (is_remount) { | |
4cf46b67 AF |
1104 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1105 | "journal on remount"); | |
71b96257 JL |
1106 | return 0; |
1107 | } | |
1108 | if (match_int(&args[0], &option)) | |
1109 | return 0; | |
1110 | *journal_devnum = option; | |
1111 | break; | |
1da177e4 LT |
1112 | case Opt_noload: |
1113 | set_opt (sbi->s_mount_opt, NOLOAD); | |
1114 | break; | |
1115 | case Opt_commit: | |
1116 | if (match_int(&args[0], &option)) | |
1117 | return 0; | |
1118 | if (option < 0) | |
1119 | return 0; | |
1120 | if (option == 0) | |
1121 | option = JBD_DEFAULT_MAX_COMMIT_AGE; | |
1122 | sbi->s_commit_interval = HZ * option; | |
1123 | break; | |
1124 | case Opt_data_journal: | |
1125 | data_opt = EXT3_MOUNT_JOURNAL_DATA; | |
1126 | goto datacheck; | |
1127 | case Opt_data_ordered: | |
1128 | data_opt = EXT3_MOUNT_ORDERED_DATA; | |
1129 | goto datacheck; | |
1130 | case Opt_data_writeback: | |
1131 | data_opt = EXT3_MOUNT_WRITEBACK_DATA; | |
1132 | datacheck: | |
1133 | if (is_remount) { | |
e3c96435 | 1134 | if (test_opt(sb, DATA_FLAGS) == data_opt) |
3c4cec65 | 1135 | break; |
4cf46b67 AF |
1136 | ext3_msg(sb, KERN_ERR, |
1137 | "error: cannot change " | |
3c4cec65 JK |
1138 | "data mode on remount. The filesystem " |
1139 | "is mounted in data=%s mode and you " | |
4cf46b67 | 1140 | "try to remount it in data=%s mode.", |
e3c96435 DM |
1141 | data_mode_string(test_opt(sb, |
1142 | DATA_FLAGS)), | |
3c4cec65 JK |
1143 | data_mode_string(data_opt)); |
1144 | return 0; | |
1da177e4 | 1145 | } else { |
e3c96435 | 1146 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
1da177e4 LT |
1147 | sbi->s_mount_opt |= data_opt; |
1148 | } | |
1149 | break; | |
0e4fb5e2 HK |
1150 | case Opt_data_err_abort: |
1151 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1152 | break; | |
1153 | case Opt_data_err_ignore: | |
1154 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1155 | break; | |
1da177e4 LT |
1156 | #ifdef CONFIG_QUOTA |
1157 | case Opt_usrjquota: | |
e1f5c67a | 1158 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
1da177e4 | 1159 | return 0; |
e1f5c67a DM |
1160 | break; |
1161 | case Opt_grpjquota: | |
1162 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
1da177e4 | 1163 | return 0; |
1da177e4 LT |
1164 | break; |
1165 | case Opt_offusrjquota: | |
e1f5c67a DM |
1166 | if (!clear_qf_name(sb, USRQUOTA)) |
1167 | return 0; | |
1168 | break; | |
1da177e4 | 1169 | case Opt_offgrpjquota: |
e1f5c67a | 1170 | if (!clear_qf_name(sb, GRPQUOTA)) |
1da177e4 | 1171 | return 0; |
1da177e4 LT |
1172 | break; |
1173 | case Opt_jqfmt_vfsold: | |
d06bf1d2 JK |
1174 | qfmt = QFMT_VFS_OLD; |
1175 | goto set_qf_format; | |
1da177e4 | 1176 | case Opt_jqfmt_vfsv0: |
d06bf1d2 | 1177 | qfmt = QFMT_VFS_V0; |
1aeec434 JK |
1178 | goto set_qf_format; |
1179 | case Opt_jqfmt_vfsv1: | |
1180 | qfmt = QFMT_VFS_V1; | |
d06bf1d2 | 1181 | set_qf_format: |
ee0d5ffe | 1182 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 | 1183 | sbi->s_jquota_fmt != qfmt) { |
4cf46b67 | 1184 | ext3_msg(sb, KERN_ERR, "error: cannot change " |
d06bf1d2 | 1185 | "journaled quota options when " |
4cf46b67 | 1186 | "quota turned on."); |
d06bf1d2 JK |
1187 | return 0; |
1188 | } | |
1189 | sbi->s_jquota_fmt = qfmt; | |
1da177e4 | 1190 | break; |
1f54587b | 1191 | case Opt_quota: |
8fc2751b MB |
1192 | case Opt_usrquota: |
1193 | set_opt(sbi->s_mount_opt, QUOTA); | |
1194 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1195 | break; | |
1196 | case Opt_grpquota: | |
1f54587b | 1197 | set_opt(sbi->s_mount_opt, QUOTA); |
8fc2751b | 1198 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
1f54587b JK |
1199 | break; |
1200 | case Opt_noquota: | |
ee0d5ffe | 1201 | if (sb_any_quota_loaded(sb)) { |
4cf46b67 AF |
1202 | ext3_msg(sb, KERN_ERR, "error: cannot change " |
1203 | "quota options when quota turned on."); | |
1f54587b JK |
1204 | return 0; |
1205 | } | |
1206 | clear_opt(sbi->s_mount_opt, QUOTA); | |
8fc2751b MB |
1207 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1208 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1f54587b | 1209 | break; |
1da177e4 | 1210 | #else |
8fc2751b MB |
1211 | case Opt_quota: |
1212 | case Opt_usrquota: | |
1213 | case Opt_grpquota: | |
4cf46b67 AF |
1214 | ext3_msg(sb, KERN_ERR, |
1215 | "error: quota options not supported."); | |
fa1ff1e0 | 1216 | break; |
1da177e4 LT |
1217 | case Opt_usrjquota: |
1218 | case Opt_grpjquota: | |
1219 | case Opt_offusrjquota: | |
1220 | case Opt_offgrpjquota: | |
1221 | case Opt_jqfmt_vfsold: | |
1222 | case Opt_jqfmt_vfsv0: | |
1aeec434 | 1223 | case Opt_jqfmt_vfsv1: |
4cf46b67 AF |
1224 | ext3_msg(sb, KERN_ERR, |
1225 | "error: journaled quota options not " | |
1226 | "supported."); | |
1da177e4 | 1227 | break; |
1f54587b JK |
1228 | case Opt_noquota: |
1229 | break; | |
1da177e4 LT |
1230 | #endif |
1231 | case Opt_abort: | |
1232 | set_opt(sbi->s_mount_opt, ABORT); | |
1233 | break; | |
0636c73e ES |
1234 | case Opt_nobarrier: |
1235 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1236 | break; | |
1da177e4 | 1237 | case Opt_barrier: |
0636c73e ES |
1238 | if (args[0].from) { |
1239 | if (match_int(&args[0], &option)) | |
1240 | return 0; | |
1241 | } else | |
1242 | option = 1; /* No argument, default to 1 */ | |
1da177e4 LT |
1243 | if (option) |
1244 | set_opt(sbi->s_mount_opt, BARRIER); | |
1245 | else | |
1246 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1247 | break; | |
1248 | case Opt_ignore: | |
1249 | break; | |
1250 | case Opt_resize: | |
08c6a96f | 1251 | if (!is_remount) { |
4cf46b67 AF |
1252 | ext3_msg(sb, KERN_ERR, |
1253 | "error: resize option only available " | |
1254 | "for remount"); | |
1da177e4 LT |
1255 | return 0; |
1256 | } | |
c7f1721e KZ |
1257 | if (match_int(&args[0], &option) != 0) |
1258 | return 0; | |
1da177e4 LT |
1259 | *n_blocks_count = option; |
1260 | break; | |
1261 | case Opt_nobh: | |
4c4d3901 CH |
1262 | ext3_msg(sb, KERN_WARNING, |
1263 | "warning: ignoring deprecated nobh option"); | |
1da177e4 | 1264 | break; |
ade1a29e | 1265 | case Opt_bh: |
4c4d3901 CH |
1266 | ext3_msg(sb, KERN_WARNING, |
1267 | "warning: ignoring deprecated bh option"); | |
ade1a29e | 1268 | break; |
1da177e4 | 1269 | default: |
4cf46b67 AF |
1270 | ext3_msg(sb, KERN_ERR, |
1271 | "error: unrecognized mount option \"%s\" " | |
1272 | "or missing value", p); | |
1da177e4 LT |
1273 | return 0; |
1274 | } | |
1275 | } | |
1276 | #ifdef CONFIG_QUOTA | |
8fc2751b | 1277 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
e3c96435 | 1278 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
8fc2751b | 1279 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
e3c96435 | 1280 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
8fc2751b MB |
1281 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
1282 | ||
e1f5c67a | 1283 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
4cf46b67 AF |
1284 | ext3_msg(sb, KERN_ERR, "error: old and new quota " |
1285 | "format mixing."); | |
8fc2751b MB |
1286 | return 0; |
1287 | } | |
1288 | ||
1289 | if (!sbi->s_jquota_fmt) { | |
4cf46b67 AF |
1290 | ext3_msg(sb, KERN_ERR, "error: journaled quota format " |
1291 | "not specified."); | |
8fc2751b MB |
1292 | return 0; |
1293 | } | |
1294 | } else { | |
1295 | if (sbi->s_jquota_fmt) { | |
4cf46b67 | 1296 | ext3_msg(sb, KERN_ERR, "error: journaled quota format " |
99aeaf63 | 1297 | "specified with no journaling " |
4cf46b67 | 1298 | "enabled."); |
8fc2751b MB |
1299 | return 0; |
1300 | } | |
1da177e4 LT |
1301 | } |
1302 | #endif | |
1da177e4 LT |
1303 | return 1; |
1304 | } | |
1305 | ||
1306 | static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es, | |
1307 | int read_only) | |
1308 | { | |
1309 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1310 | int res = 0; | |
1311 | ||
1312 | if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) { | |
4cf46b67 AF |
1313 | ext3_msg(sb, KERN_ERR, |
1314 | "error: revision level too high, " | |
1315 | "forcing read-only mode"); | |
1da177e4 LT |
1316 | res = MS_RDONLY; |
1317 | } | |
1318 | if (read_only) | |
1319 | return res; | |
1320 | if (!(sbi->s_mount_state & EXT3_VALID_FS)) | |
4cf46b67 AF |
1321 | ext3_msg(sb, KERN_WARNING, |
1322 | "warning: mounting unchecked fs, " | |
1323 | "running e2fsck is recommended"); | |
1da177e4 | 1324 | else if ((sbi->s_mount_state & EXT3_ERROR_FS)) |
4cf46b67 AF |
1325 | ext3_msg(sb, KERN_WARNING, |
1326 | "warning: mounting fs with errors, " | |
1327 | "running e2fsck is recommended"); | |
df0d6b8f | 1328 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
1da177e4 | 1329 | le16_to_cpu(es->s_mnt_count) >= |
df0d6b8f | 1330 | le16_to_cpu(es->s_max_mnt_count)) |
4cf46b67 AF |
1331 | ext3_msg(sb, KERN_WARNING, |
1332 | "warning: maximal mount count reached, " | |
1333 | "running e2fsck is recommended"); | |
1da177e4 LT |
1334 | else if (le32_to_cpu(es->s_checkinterval) && |
1335 | (le32_to_cpu(es->s_lastcheck) + | |
1336 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
4cf46b67 AF |
1337 | ext3_msg(sb, KERN_WARNING, |
1338 | "warning: checktime reached, " | |
1339 | "running e2fsck is recommended"); | |
1da177e4 LT |
1340 | #if 0 |
1341 | /* @@@ We _will_ want to clear the valid bit if we find | |
1342 | inconsistencies, to force a fsck at reboot. But for | |
1343 | a plain journaled filesystem we can keep it set as | |
1344 | valid forever! :) */ | |
e7f23ebd | 1345 | es->s_state &= cpu_to_le16(~EXT3_VALID_FS); |
1da177e4 | 1346 | #endif |
df0d6b8f | 1347 | if (!le16_to_cpu(es->s_max_mnt_count)) |
1da177e4 | 1348 | es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT); |
50e8a289 | 1349 | le16_add_cpu(&es->s_mnt_count, 1); |
1da177e4 LT |
1350 | es->s_mtime = cpu_to_le32(get_seconds()); |
1351 | ext3_update_dynamic_rev(sb); | |
1352 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1353 | ||
1354 | ext3_commit_super(sb, es, 1); | |
1355 | if (test_opt(sb, DEBUG)) | |
4cf46b67 AF |
1356 | ext3_msg(sb, KERN_INFO, "[bs=%lu, gc=%lu, " |
1357 | "bpg=%lu, ipg=%lu, mo=%04lx]", | |
1da177e4 LT |
1358 | sb->s_blocksize, |
1359 | sbi->s_groups_count, | |
1360 | EXT3_BLOCKS_PER_GROUP(sb), | |
1361 | EXT3_INODES_PER_GROUP(sb), | |
1362 | sbi->s_mount_opt); | |
1363 | ||
1da177e4 LT |
1364 | if (EXT3_SB(sb)->s_journal->j_inode == NULL) { |
1365 | char b[BDEVNAME_SIZE]; | |
4cf46b67 | 1366 | ext3_msg(sb, KERN_INFO, "using external journal on %s", |
1da177e4 LT |
1367 | bdevname(EXT3_SB(sb)->s_journal->j_dev, b)); |
1368 | } else { | |
4cf46b67 | 1369 | ext3_msg(sb, KERN_INFO, "using internal journal"); |
1da177e4 | 1370 | } |
d71bc6db | 1371 | cleancache_init_fs(sb); |
1da177e4 LT |
1372 | return res; |
1373 | } | |
1374 | ||
1375 | /* Called at mount-time, super-block is locked */ | |
197cd65a | 1376 | static int ext3_check_descriptors(struct super_block *sb) |
1da177e4 LT |
1377 | { |
1378 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1da177e4 LT |
1379 | int i; |
1380 | ||
1381 | ext3_debug ("Checking group descriptors"); | |
1382 | ||
197cd65a AM |
1383 | for (i = 0; i < sbi->s_groups_count; i++) { |
1384 | struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL); | |
1eaafeae AM |
1385 | ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i); |
1386 | ext3_fsblk_t last_block; | |
197cd65a | 1387 | |
855565e8 ES |
1388 | if (i == sbi->s_groups_count - 1) |
1389 | last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1; | |
1390 | else | |
1391 | last_block = first_block + | |
1392 | (EXT3_BLOCKS_PER_GROUP(sb) - 1); | |
1393 | ||
855565e8 ES |
1394 | if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || |
1395 | le32_to_cpu(gdp->bg_block_bitmap) > last_block) | |
1da177e4 LT |
1396 | { |
1397 | ext3_error (sb, "ext3_check_descriptors", | |
1398 | "Block bitmap for group %d" | |
1399 | " not in group (block %lu)!", | |
1400 | i, (unsigned long) | |
1401 | le32_to_cpu(gdp->bg_block_bitmap)); | |
1402 | return 0; | |
1403 | } | |
855565e8 ES |
1404 | if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || |
1405 | le32_to_cpu(gdp->bg_inode_bitmap) > last_block) | |
1da177e4 LT |
1406 | { |
1407 | ext3_error (sb, "ext3_check_descriptors", | |
1408 | "Inode bitmap for group %d" | |
1409 | " not in group (block %lu)!", | |
1410 | i, (unsigned long) | |
1411 | le32_to_cpu(gdp->bg_inode_bitmap)); | |
1412 | return 0; | |
1413 | } | |
855565e8 | 1414 | if (le32_to_cpu(gdp->bg_inode_table) < first_block || |
780dcdb2 | 1415 | le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 > |
855565e8 | 1416 | last_block) |
1da177e4 LT |
1417 | { |
1418 | ext3_error (sb, "ext3_check_descriptors", | |
1419 | "Inode table for group %d" | |
1420 | " not in group (block %lu)!", | |
1421 | i, (unsigned long) | |
1422 | le32_to_cpu(gdp->bg_inode_table)); | |
1423 | return 0; | |
1424 | } | |
1da177e4 LT |
1425 | } |
1426 | ||
1427 | sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb)); | |
1428 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb)); | |
1429 | return 1; | |
1430 | } | |
1431 | ||
1432 | ||
1433 | /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at | |
1434 | * the superblock) which were deleted from all directories, but held open by | |
1435 | * a process at the time of a crash. We walk the list and try to delete these | |
1436 | * inodes at recovery time (only with a read-write filesystem). | |
1437 | * | |
1438 | * In order to keep the orphan inode chain consistent during traversal (in | |
1439 | * case of crash during recovery), we link each inode into the superblock | |
1440 | * orphan list_head and handle it the same way as an inode deletion during | |
1441 | * normal operation (which journals the operations for us). | |
1442 | * | |
1443 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1444 | * accidentally point at an in-use or already deleted inode. The worst that | |
1445 | * can happen in this case is that we get a "bit already cleared" message from | |
1446 | * ext3_free_inode(). The only reason we would point at a wrong inode is if | |
1447 | * e2fsck was run on this filesystem, and it must have already done the orphan | |
1448 | * inode cleanup for us, so we can safely abort without any further action. | |
1449 | */ | |
1450 | static void ext3_orphan_cleanup (struct super_block * sb, | |
1451 | struct ext3_super_block * es) | |
1452 | { | |
1453 | unsigned int s_flags = sb->s_flags; | |
1454 | int nr_orphans = 0, nr_truncates = 0; | |
1455 | #ifdef CONFIG_QUOTA | |
1456 | int i; | |
1457 | #endif | |
1458 | if (!es->s_last_orphan) { | |
1459 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1460 | return; | |
1461 | } | |
1462 | ||
a8f48a95 | 1463 | if (bdev_read_only(sb->s_bdev)) { |
4cf46b67 AF |
1464 | ext3_msg(sb, KERN_ERR, "error: write access " |
1465 | "unavailable, skipping orphan cleanup."); | |
a8f48a95 ES |
1466 | return; |
1467 | } | |
1468 | ||
ce654b37 AG |
1469 | /* Check if feature set allows readwrite operations */ |
1470 | if (EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) { | |
1471 | ext3_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
1472 | "unknown ROCOMPAT features"); | |
1473 | return; | |
a8f48a95 ES |
1474 | } |
1475 | ||
1da177e4 LT |
1476 | if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { |
1477 | if (es->s_last_orphan) | |
1478 | jbd_debug(1, "Errors on filesystem, " | |
1479 | "clearing orphan list.\n"); | |
1480 | es->s_last_orphan = 0; | |
1481 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1482 | return; | |
1483 | } | |
1484 | ||
1485 | if (s_flags & MS_RDONLY) { | |
4cf46b67 | 1486 | ext3_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
1da177e4 LT |
1487 | sb->s_flags &= ~MS_RDONLY; |
1488 | } | |
1489 | #ifdef CONFIG_QUOTA | |
1490 | /* Needed for iput() to work correctly and not trash data */ | |
1491 | sb->s_flags |= MS_ACTIVE; | |
1492 | /* Turn on quotas so that they are updated correctly */ | |
1493 | for (i = 0; i < MAXQUOTAS; i++) { | |
1494 | if (EXT3_SB(sb)->s_qf_names[i]) { | |
1495 | int ret = ext3_quota_on_mount(sb, i); | |
1496 | if (ret < 0) | |
4cf46b67 AF |
1497 | ext3_msg(sb, KERN_ERR, |
1498 | "error: cannot turn on journaled " | |
1499 | "quota: %d", ret); | |
1da177e4 LT |
1500 | } |
1501 | } | |
1502 | #endif | |
1503 | ||
1504 | while (es->s_last_orphan) { | |
1505 | struct inode *inode; | |
1506 | ||
473043dc DH |
1507 | inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1508 | if (IS_ERR(inode)) { | |
1da177e4 LT |
1509 | es->s_last_orphan = 0; |
1510 | break; | |
1511 | } | |
1512 | ||
1513 | list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan); | |
871a2931 | 1514 | dquot_initialize(inode); |
1da177e4 LT |
1515 | if (inode->i_nlink) { |
1516 | printk(KERN_DEBUG | |
eee194e7 | 1517 | "%s: truncating inode %lu to %Ld bytes\n", |
e05b6b52 | 1518 | __func__, inode->i_ino, inode->i_size); |
eee194e7 | 1519 | jbd_debug(2, "truncating inode %lu to %Ld bytes\n", |
1da177e4 LT |
1520 | inode->i_ino, inode->i_size); |
1521 | ext3_truncate(inode); | |
1522 | nr_truncates++; | |
1523 | } else { | |
1524 | printk(KERN_DEBUG | |
eee194e7 | 1525 | "%s: deleting unreferenced inode %lu\n", |
e05b6b52 | 1526 | __func__, inode->i_ino); |
eee194e7 | 1527 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1da177e4 LT |
1528 | inode->i_ino); |
1529 | nr_orphans++; | |
1530 | } | |
1531 | iput(inode); /* The delete magic happens here! */ | |
1532 | } | |
1533 | ||
1534 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" | |
1535 | ||
1536 | if (nr_orphans) | |
4cf46b67 AF |
1537 | ext3_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
1538 | PLURAL(nr_orphans)); | |
1da177e4 | 1539 | if (nr_truncates) |
4cf46b67 AF |
1540 | ext3_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
1541 | PLURAL(nr_truncates)); | |
1da177e4 LT |
1542 | #ifdef CONFIG_QUOTA |
1543 | /* Turn quotas off */ | |
1544 | for (i = 0; i < MAXQUOTAS; i++) { | |
1545 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 1546 | dquot_quota_off(sb, i); |
1da177e4 LT |
1547 | } |
1548 | #endif | |
1549 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1550 | } | |
1551 | ||
1da177e4 LT |
1552 | /* |
1553 | * Maximal file size. There is a direct, and {,double-,triple-}indirect | |
1554 | * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. | |
1555 | * We need to be 1 filesystem block less than the 2^32 sector limit. | |
1556 | */ | |
1557 | static loff_t ext3_max_size(int bits) | |
1558 | { | |
1559 | loff_t res = EXT3_NDIR_BLOCKS; | |
fe7fdc37 AK |
1560 | int meta_blocks; |
1561 | loff_t upper_limit; | |
1562 | ||
1563 | /* This is calculated to be the largest file size for a | |
1564 | * dense, file such that the total number of | |
1da177e4 | 1565 | * sectors in the file, including data and all indirect blocks, |
fe7fdc37 AK |
1566 | * does not exceed 2^32 -1 |
1567 | * __u32 i_blocks representing the total number of | |
1568 | * 512 bytes blocks of the file | |
1569 | */ | |
1570 | upper_limit = (1LL << 32) - 1; | |
1571 | ||
1572 | /* total blocks in file system block size */ | |
1573 | upper_limit >>= (bits - 9); | |
1574 | ||
1575 | ||
1576 | /* indirect blocks */ | |
1577 | meta_blocks = 1; | |
1578 | /* double indirect blocks */ | |
1579 | meta_blocks += 1 + (1LL << (bits-2)); | |
1580 | /* tripple indirect blocks */ | |
1581 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1582 | ||
1583 | upper_limit -= meta_blocks; | |
1584 | upper_limit <<= bits; | |
1da177e4 LT |
1585 | |
1586 | res += 1LL << (bits-2); | |
1587 | res += 1LL << (2*(bits-2)); | |
1588 | res += 1LL << (3*(bits-2)); | |
1589 | res <<= bits; | |
1590 | if (res > upper_limit) | |
1591 | res = upper_limit; | |
fe7fdc37 AK |
1592 | |
1593 | if (res > MAX_LFS_FILESIZE) | |
1594 | res = MAX_LFS_FILESIZE; | |
1595 | ||
1da177e4 LT |
1596 | return res; |
1597 | } | |
1598 | ||
43d23f90 MC |
1599 | static ext3_fsblk_t descriptor_loc(struct super_block *sb, |
1600 | ext3_fsblk_t logic_sb_block, | |
1da177e4 LT |
1601 | int nr) |
1602 | { | |
1603 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 1604 | unsigned long bg, first_meta_bg; |
1da177e4 LT |
1605 | int has_super = 0; |
1606 | ||
1da177e4 LT |
1607 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
1608 | ||
1609 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) || | |
1610 | nr < first_meta_bg) | |
1611 | return (logic_sb_block + nr + 1); | |
1612 | bg = sbi->s_desc_per_block * nr; | |
1613 | if (ext3_bg_has_super(sb, bg)) | |
1614 | has_super = 1; | |
43d23f90 | 1615 | return (has_super + ext3_group_first_block_no(sb, bg)); |
1da177e4 LT |
1616 | } |
1617 | ||
1618 | ||
1619 | static int ext3_fill_super (struct super_block *sb, void *data, int silent) | |
1620 | { | |
1621 | struct buffer_head * bh; | |
1622 | struct ext3_super_block *es = NULL; | |
1623 | struct ext3_sb_info *sbi; | |
43d23f90 | 1624 | ext3_fsblk_t block; |
4cf46b67 | 1625 | ext3_fsblk_t sb_block = get_sb_block(&data, sb); |
43d23f90 | 1626 | ext3_fsblk_t logic_sb_block; |
1da177e4 | 1627 | unsigned long offset = 0; |
eee194e7 | 1628 | unsigned int journal_inum = 0; |
71b96257 | 1629 | unsigned long journal_devnum = 0; |
1da177e4 LT |
1630 | unsigned long def_mount_opts; |
1631 | struct inode *root; | |
1632 | int blocksize; | |
1633 | int hblock; | |
1634 | int db_count; | |
1635 | int i; | |
1636 | int needs_recovery; | |
473043dc | 1637 | int ret = -EINVAL; |
1da177e4 | 1638 | __le32 features; |
833f4077 | 1639 | int err; |
1da177e4 | 1640 | |
f8314dc6 | 1641 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
1642 | if (!sbi) |
1643 | return -ENOMEM; | |
5df096d6 PE |
1644 | |
1645 | sbi->s_blockgroup_lock = | |
1646 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
1647 | if (!sbi->s_blockgroup_lock) { | |
1648 | kfree(sbi); | |
1649 | return -ENOMEM; | |
1650 | } | |
1da177e4 | 1651 | sb->s_fs_info = sbi; |
1da177e4 LT |
1652 | sbi->s_mount_opt = 0; |
1653 | sbi->s_resuid = EXT3_DEF_RESUID; | |
1654 | sbi->s_resgid = EXT3_DEF_RESGID; | |
571beed8 | 1655 | sbi->s_sb_block = sb_block; |
1da177e4 | 1656 | |
1da177e4 LT |
1657 | blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); |
1658 | if (!blocksize) { | |
4cf46b67 | 1659 | ext3_msg(sb, KERN_ERR, "error: unable to set blocksize"); |
1da177e4 LT |
1660 | goto out_fail; |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * The ext3 superblock will not be buffer aligned for other than 1kB | |
1665 | * block sizes. We need to calculate the offset from buffer start. | |
1666 | */ | |
1667 | if (blocksize != EXT3_MIN_BLOCK_SIZE) { | |
1668 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; | |
1669 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1670 | } else { | |
1671 | logic_sb_block = sb_block; | |
1672 | } | |
1673 | ||
1674 | if (!(bh = sb_bread(sb, logic_sb_block))) { | |
4cf46b67 | 1675 | ext3_msg(sb, KERN_ERR, "error: unable to read superblock"); |
1da177e4 LT |
1676 | goto out_fail; |
1677 | } | |
1678 | /* | |
1679 | * Note: s_es must be initialized as soon as possible because | |
1680 | * some ext3 macro-instructions depend on its value | |
1681 | */ | |
57e94d86 | 1682 | es = (struct ext3_super_block *) (bh->b_data + offset); |
1da177e4 LT |
1683 | sbi->s_es = es; |
1684 | sb->s_magic = le16_to_cpu(es->s_magic); | |
1685 | if (sb->s_magic != EXT3_SUPER_MAGIC) | |
1686 | goto cantfind_ext3; | |
1687 | ||
1688 | /* Set defaults before we parse the mount options */ | |
1689 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
1690 | if (def_mount_opts & EXT3_DEFM_DEBUG) | |
1691 | set_opt(sbi->s_mount_opt, DEBUG); | |
1692 | if (def_mount_opts & EXT3_DEFM_BSDGROUPS) | |
1693 | set_opt(sbi->s_mount_opt, GRPID); | |
1694 | if (def_mount_opts & EXT3_DEFM_UID16) | |
1695 | set_opt(sbi->s_mount_opt, NO_UID32); | |
2e7842b8 | 1696 | #ifdef CONFIG_EXT3_FS_XATTR |
1da177e4 LT |
1697 | if (def_mount_opts & EXT3_DEFM_XATTR_USER) |
1698 | set_opt(sbi->s_mount_opt, XATTR_USER); | |
2e7842b8 HD |
1699 | #endif |
1700 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1da177e4 LT |
1701 | if (def_mount_opts & EXT3_DEFM_ACL) |
1702 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
2e7842b8 | 1703 | #endif |
1da177e4 | 1704 | if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA) |
e3c96435 | 1705 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
1da177e4 | 1706 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED) |
e3c96435 | 1707 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
1da177e4 | 1708 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK) |
e3c96435 | 1709 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
1da177e4 LT |
1710 | |
1711 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC) | |
1712 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1eca93f9 | 1713 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE) |
2245d7c2 | 1714 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
1eca93f9 AK |
1715 | else |
1716 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
1da177e4 LT |
1717 | |
1718 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
1719 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
1720 | ||
1721 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1722 | ||
71b96257 JL |
1723 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
1724 | NULL, 0)) | |
1da177e4 LT |
1725 | goto failed_mount; |
1726 | ||
1727 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
e3c96435 | 1728 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
1da177e4 LT |
1729 | |
1730 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV && | |
1731 | (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1732 | EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1733 | EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
4cf46b67 AF |
1734 | ext3_msg(sb, KERN_WARNING, |
1735 | "warning: feature flags set on rev 0 fs, " | |
1736 | "running e2fsck is recommended"); | |
1da177e4 LT |
1737 | /* |
1738 | * Check feature flags regardless of the revision level, since we | |
1739 | * previously didn't change the revision level when setting the flags, | |
1740 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
1741 | */ | |
1742 | features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP); | |
1743 | if (features) { | |
4cf46b67 AF |
1744 | ext3_msg(sb, KERN_ERR, |
1745 | "error: couldn't mount because of unsupported " | |
1746 | "optional features (%x)", le32_to_cpu(features)); | |
1da177e4 LT |
1747 | goto failed_mount; |
1748 | } | |
1749 | features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP); | |
1750 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
4cf46b67 AF |
1751 | ext3_msg(sb, KERN_ERR, |
1752 | "error: couldn't mount RDWR because of unsupported " | |
1753 | "optional features (%x)", le32_to_cpu(features)); | |
1da177e4 LT |
1754 | goto failed_mount; |
1755 | } | |
1756 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
1757 | ||
1758 | if (blocksize < EXT3_MIN_BLOCK_SIZE || | |
1759 | blocksize > EXT3_MAX_BLOCK_SIZE) { | |
4cf46b67 AF |
1760 | ext3_msg(sb, KERN_ERR, |
1761 | "error: couldn't mount because of unsupported " | |
1762 | "filesystem blocksize %d", blocksize); | |
1da177e4 LT |
1763 | goto failed_mount; |
1764 | } | |
1765 | ||
e1defc4f | 1766 | hblock = bdev_logical_block_size(sb->s_bdev); |
1da177e4 LT |
1767 | if (sb->s_blocksize != blocksize) { |
1768 | /* | |
1769 | * Make sure the blocksize for the filesystem is larger | |
1770 | * than the hardware sectorsize for the machine. | |
1771 | */ | |
1772 | if (blocksize < hblock) { | |
4cf46b67 AF |
1773 | ext3_msg(sb, KERN_ERR, |
1774 | "error: fsblocksize %d too small for " | |
1775 | "hardware sectorsize %d", blocksize, hblock); | |
1da177e4 LT |
1776 | goto failed_mount; |
1777 | } | |
1778 | ||
1779 | brelse (bh); | |
0f0a89eb | 1780 | if (!sb_set_blocksize(sb, blocksize)) { |
4cf46b67 AF |
1781 | ext3_msg(sb, KERN_ERR, |
1782 | "error: bad blocksize %d", blocksize); | |
0f0a89eb TS |
1783 | goto out_fail; |
1784 | } | |
1da177e4 LT |
1785 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; |
1786 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1787 | bh = sb_bread(sb, logic_sb_block); | |
1788 | if (!bh) { | |
4cf46b67 AF |
1789 | ext3_msg(sb, KERN_ERR, |
1790 | "error: can't read superblock on 2nd try"); | |
1da177e4 LT |
1791 | goto failed_mount; |
1792 | } | |
57e94d86 | 1793 | es = (struct ext3_super_block *)(bh->b_data + offset); |
1da177e4 LT |
1794 | sbi->s_es = es; |
1795 | if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) { | |
4cf46b67 AF |
1796 | ext3_msg(sb, KERN_ERR, |
1797 | "error: magic mismatch"); | |
1da177e4 LT |
1798 | goto failed_mount; |
1799 | } | |
1800 | } | |
1801 | ||
1802 | sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits); | |
1803 | ||
1804 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) { | |
1805 | sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE; | |
1806 | sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO; | |
1807 | } else { | |
1808 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
1809 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
1810 | if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) || | |
3fc74269 | 1811 | (!is_power_of_2(sbi->s_inode_size)) || |
1da177e4 | 1812 | (sbi->s_inode_size > blocksize)) { |
4cf46b67 AF |
1813 | ext3_msg(sb, KERN_ERR, |
1814 | "error: unsupported inode size: %d", | |
1da177e4 LT |
1815 | sbi->s_inode_size); |
1816 | goto failed_mount; | |
1817 | } | |
1818 | } | |
1819 | sbi->s_frag_size = EXT3_MIN_FRAG_SIZE << | |
1820 | le32_to_cpu(es->s_log_frag_size); | |
1821 | if (blocksize != sbi->s_frag_size) { | |
4cf46b67 AF |
1822 | ext3_msg(sb, KERN_ERR, |
1823 | "error: fragsize %lu != blocksize %u (unsupported)", | |
1da177e4 LT |
1824 | sbi->s_frag_size, blocksize); |
1825 | goto failed_mount; | |
1826 | } | |
1827 | sbi->s_frags_per_block = 1; | |
1828 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); | |
1829 | sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); | |
1830 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); | |
b47b6f38 | 1831 | if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0) |
1da177e4 LT |
1832 | goto cantfind_ext3; |
1833 | sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb); | |
1834 | if (sbi->s_inodes_per_block == 0) | |
1835 | goto cantfind_ext3; | |
1836 | sbi->s_itb_per_group = sbi->s_inodes_per_group / | |
1837 | sbi->s_inodes_per_block; | |
1838 | sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc); | |
1839 | sbi->s_sbh = bh; | |
1840 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
f0d1b0b3 DH |
1841 | sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb)); |
1842 | sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb)); | |
1da177e4 LT |
1843 | for (i=0; i < 4; i++) |
1844 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
1845 | sbi->s_def_hash_version = es->s_def_hash_version; | |
5e1f8c9e TT |
1846 | i = le32_to_cpu(es->s_flags); |
1847 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
1848 | sbi->s_hash_unsigned = 3; | |
1849 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
1850 | #ifdef __CHAR_UNSIGNED__ | |
1851 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
1852 | sbi->s_hash_unsigned = 3; | |
1853 | #else | |
1854 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
1855 | #endif | |
5e1f8c9e | 1856 | } |
1da177e4 LT |
1857 | |
1858 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
4cf46b67 AF |
1859 | ext3_msg(sb, KERN_ERR, |
1860 | "#blocks per group too big: %lu", | |
1da177e4 LT |
1861 | sbi->s_blocks_per_group); |
1862 | goto failed_mount; | |
1863 | } | |
1864 | if (sbi->s_frags_per_group > blocksize * 8) { | |
4cf46b67 AF |
1865 | ext3_msg(sb, KERN_ERR, |
1866 | "error: #fragments per group too big: %lu", | |
1da177e4 LT |
1867 | sbi->s_frags_per_group); |
1868 | goto failed_mount; | |
1869 | } | |
1870 | if (sbi->s_inodes_per_group > blocksize * 8) { | |
4cf46b67 AF |
1871 | ext3_msg(sb, KERN_ERR, |
1872 | "error: #inodes per group too big: %lu", | |
1da177e4 LT |
1873 | sbi->s_inodes_per_group); |
1874 | goto failed_mount; | |
1875 | } | |
1876 | ||
ad692bf3 DW |
1877 | err = generic_check_addressable(sb->s_blocksize_bits, |
1878 | le32_to_cpu(es->s_blocks_count)); | |
1879 | if (err) { | |
4cf46b67 AF |
1880 | ext3_msg(sb, KERN_ERR, |
1881 | "error: filesystem is too large to mount safely"); | |
fcd5df35 | 1882 | if (sizeof(sector_t) < 8) |
4cf46b67 AF |
1883 | ext3_msg(sb, KERN_ERR, |
1884 | "error: CONFIG_LBDAF not enabled"); | |
ad692bf3 | 1885 | ret = err; |
fcd5df35 MC |
1886 | goto failed_mount; |
1887 | } | |
1888 | ||
1da177e4 LT |
1889 | if (EXT3_BLOCKS_PER_GROUP(sb) == 0) |
1890 | goto cantfind_ext3; | |
855565e8 ES |
1891 | sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - |
1892 | le32_to_cpu(es->s_first_data_block) - 1) | |
1893 | / EXT3_BLOCKS_PER_GROUP(sb)) + 1; | |
81a4e320 | 1894 | db_count = DIV_ROUND_UP(sbi->s_groups_count, EXT3_DESC_PER_BLOCK(sb)); |
1da177e4 LT |
1895 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), |
1896 | GFP_KERNEL); | |
1897 | if (sbi->s_group_desc == NULL) { | |
4cf46b67 AF |
1898 | ext3_msg(sb, KERN_ERR, |
1899 | "error: not enough memory"); | |
4569cd1b | 1900 | ret = -ENOMEM; |
1da177e4 LT |
1901 | goto failed_mount; |
1902 | } | |
1903 | ||
5df096d6 | 1904 | bgl_lock_init(sbi->s_blockgroup_lock); |
1da177e4 LT |
1905 | |
1906 | for (i = 0; i < db_count; i++) { | |
1907 | block = descriptor_loc(sb, logic_sb_block, i); | |
1908 | sbi->s_group_desc[i] = sb_bread(sb, block); | |
1909 | if (!sbi->s_group_desc[i]) { | |
4cf46b67 AF |
1910 | ext3_msg(sb, KERN_ERR, |
1911 | "error: can't read group descriptor %d", i); | |
1da177e4 LT |
1912 | db_count = i; |
1913 | goto failed_mount2; | |
1914 | } | |
1915 | } | |
1916 | if (!ext3_check_descriptors (sb)) { | |
4cf46b67 AF |
1917 | ext3_msg(sb, KERN_ERR, |
1918 | "error: group descriptors corrupted"); | |
1da177e4 LT |
1919 | goto failed_mount2; |
1920 | } | |
1921 | sbi->s_gdb_count = db_count; | |
1922 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1923 | spin_lock_init(&sbi->s_next_gen_lock); | |
0216bfcf | 1924 | |
1da177e4 LT |
1925 | /* per fileystem reservation list head & lock */ |
1926 | spin_lock_init(&sbi->s_rsv_window_lock); | |
1927 | sbi->s_rsv_window_root = RB_ROOT; | |
1928 | /* Add a single, static dummy reservation to the start of the | |
1929 | * reservation window list --- it gives us a placeholder for | |
1930 | * append-at-start-of-list which makes the allocation logic | |
1931 | * _much_ simpler. */ | |
1932 | sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1933 | sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1934 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; | |
1935 | sbi->s_rsv_window_head.rsv_goal_size = 0; | |
1936 | ext3_rsv_window_add(sb, &sbi->s_rsv_window_head); | |
1937 | ||
1938 | /* | |
1939 | * set up enough so that it can read an inode | |
1940 | */ | |
1941 | sb->s_op = &ext3_sops; | |
1942 | sb->s_export_op = &ext3_export_ops; | |
1943 | sb->s_xattr = ext3_xattr_handlers; | |
1944 | #ifdef CONFIG_QUOTA | |
1945 | sb->s_qcop = &ext3_qctl_operations; | |
1946 | sb->dq_op = &ext3_quota_operations; | |
1947 | #endif | |
03cb5f03 | 1948 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
1da177e4 | 1949 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
b8a052d0 | 1950 | mutex_init(&sbi->s_orphan_lock); |
96d2a495 | 1951 | mutex_init(&sbi->s_resize_lock); |
1da177e4 LT |
1952 | |
1953 | sb->s_root = NULL; | |
1954 | ||
1955 | needs_recovery = (es->s_last_orphan != 0 || | |
1956 | EXT3_HAS_INCOMPAT_FEATURE(sb, | |
1957 | EXT3_FEATURE_INCOMPAT_RECOVER)); | |
1958 | ||
1959 | /* | |
1960 | * The first inode we look at is the journal inode. Don't try | |
1961 | * root first: it may be modified in the journal! | |
1962 | */ | |
1963 | if (!test_opt(sb, NOLOAD) && | |
1964 | EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { | |
71b96257 | 1965 | if (ext3_load_journal(sb, es, journal_devnum)) |
41d1a636 | 1966 | goto failed_mount2; |
1da177e4 LT |
1967 | } else if (journal_inum) { |
1968 | if (ext3_create_journal(sb, es, journal_inum)) | |
41d1a636 | 1969 | goto failed_mount2; |
1da177e4 LT |
1970 | } else { |
1971 | if (!silent) | |
4cf46b67 AF |
1972 | ext3_msg(sb, KERN_ERR, |
1973 | "error: no journal found. " | |
1974 | "mounting ext3 over ext2?"); | |
41d1a636 DM |
1975 | goto failed_mount2; |
1976 | } | |
1977 | err = percpu_counter_init(&sbi->s_freeblocks_counter, | |
1978 | ext3_count_free_blocks(sb)); | |
1979 | if (!err) { | |
1980 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
1981 | ext3_count_free_inodes(sb)); | |
1982 | } | |
1983 | if (!err) { | |
1984 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
1985 | ext3_count_dirs(sb)); | |
1986 | } | |
1987 | if (err) { | |
1988 | ext3_msg(sb, KERN_ERR, "error: insufficient memory"); | |
4569cd1b | 1989 | ret = err; |
0216bfcf | 1990 | goto failed_mount3; |
1da177e4 LT |
1991 | } |
1992 | ||
1993 | /* We have now updated the journal if required, so we can | |
1994 | * validate the data journaling mode. */ | |
1995 | switch (test_opt(sb, DATA_FLAGS)) { | |
1996 | case 0: | |
1997 | /* No mode set, assume a default based on the journal | |
1998 | capabilities: ORDERED_DATA if the journal can | |
1999 | cope, else JOURNAL_DATA */ | |
2000 | if (journal_check_available_features | |
2001 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) | |
bbae8bcc | 2002 | set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE); |
1da177e4 LT |
2003 | else |
2004 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2005 | break; | |
2006 | ||
2007 | case EXT3_MOUNT_ORDERED_DATA: | |
2008 | case EXT3_MOUNT_WRITEBACK_DATA: | |
2009 | if (!journal_check_available_features | |
2010 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) { | |
4cf46b67 AF |
2011 | ext3_msg(sb, KERN_ERR, |
2012 | "error: journal does not support " | |
2013 | "requested data journaling mode"); | |
41d1a636 | 2014 | goto failed_mount3; |
1da177e4 LT |
2015 | } |
2016 | default: | |
2017 | break; | |
2018 | } | |
2019 | ||
1da177e4 LT |
2020 | /* |
2021 | * The journal_load will have done any necessary log recovery, | |
2022 | * so we can safely mount the rest of the filesystem now. | |
2023 | */ | |
2024 | ||
473043dc DH |
2025 | root = ext3_iget(sb, EXT3_ROOT_INO); |
2026 | if (IS_ERR(root)) { | |
4cf46b67 | 2027 | ext3_msg(sb, KERN_ERR, "error: get root inode failed"); |
473043dc | 2028 | ret = PTR_ERR(root); |
41d1a636 | 2029 | goto failed_mount3; |
1da177e4 LT |
2030 | } |
2031 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
473043dc | 2032 | iput(root); |
4cf46b67 | 2033 | ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck"); |
41d1a636 | 2034 | goto failed_mount3; |
1da177e4 | 2035 | } |
473043dc DH |
2036 | sb->s_root = d_alloc_root(root); |
2037 | if (!sb->s_root) { | |
4cf46b67 | 2038 | ext3_msg(sb, KERN_ERR, "error: get root dentry failed"); |
473043dc DH |
2039 | iput(root); |
2040 | ret = -ENOMEM; | |
41d1a636 | 2041 | goto failed_mount3; |
473043dc | 2042 | } |
1da177e4 LT |
2043 | |
2044 | ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY); | |
ed505ee4 | 2045 | |
1da177e4 LT |
2046 | EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS; |
2047 | ext3_orphan_cleanup(sb, es); | |
2048 | EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS; | |
2049 | if (needs_recovery) | |
4cf46b67 | 2050 | ext3_msg(sb, KERN_INFO, "recovery complete"); |
1da177e4 | 2051 | ext3_mark_recovery_complete(sb, es); |
4cf46b67 | 2052 | ext3_msg(sb, KERN_INFO, "mounted filesystem with %s data mode", |
1da177e4 LT |
2053 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal": |
2054 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered": | |
2055 | "writeback"); | |
2056 | ||
1da177e4 LT |
2057 | return 0; |
2058 | ||
2059 | cantfind_ext3: | |
2060 | if (!silent) | |
4cf46b67 AF |
2061 | ext3_msg(sb, KERN_INFO, |
2062 | "error: can't find ext3 filesystem on dev %s.", | |
1da177e4 LT |
2063 | sb->s_id); |
2064 | goto failed_mount; | |
2065 | ||
0216bfcf MC |
2066 | failed_mount3: |
2067 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2068 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2069 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
41d1a636 | 2070 | journal_destroy(sbi->s_journal); |
1da177e4 LT |
2071 | failed_mount2: |
2072 | for (i = 0; i < db_count; i++) | |
2073 | brelse(sbi->s_group_desc[i]); | |
2074 | kfree(sbi->s_group_desc); | |
2075 | failed_mount: | |
2076 | #ifdef CONFIG_QUOTA | |
2077 | for (i = 0; i < MAXQUOTAS; i++) | |
2078 | kfree(sbi->s_qf_names[i]); | |
2079 | #endif | |
2080 | ext3_blkdev_remove(sbi); | |
2081 | brelse(bh); | |
2082 | out_fail: | |
2083 | sb->s_fs_info = NULL; | |
de5ce037 | 2084 | kfree(sbi->s_blockgroup_lock); |
1da177e4 | 2085 | kfree(sbi); |
473043dc | 2086 | return ret; |
1da177e4 LT |
2087 | } |
2088 | ||
2089 | /* | |
2090 | * Setup any per-fs journal parameters now. We'll do this both on | |
2091 | * initial mount, once the journal has been initialised but before we've | |
ae6ddcc5 | 2092 | * done any recovery; and again on any subsequent remount. |
1da177e4 LT |
2093 | */ |
2094 | static void ext3_init_journal_params(struct super_block *sb, journal_t *journal) | |
2095 | { | |
2096 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
2097 | ||
2098 | if (sbi->s_commit_interval) | |
2099 | journal->j_commit_interval = sbi->s_commit_interval; | |
2100 | /* We could also set up an ext3-specific default for the commit | |
2101 | * interval here, but for now we'll just fall back to the jbd | |
2102 | * default. */ | |
2103 | ||
2104 | spin_lock(&journal->j_state_lock); | |
2105 | if (test_opt(sb, BARRIER)) | |
2106 | journal->j_flags |= JFS_BARRIER; | |
2107 | else | |
2108 | journal->j_flags &= ~JFS_BARRIER; | |
0e4fb5e2 HK |
2109 | if (test_opt(sb, DATA_ERR_ABORT)) |
2110 | journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR; | |
2111 | else | |
2112 | journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR; | |
1da177e4 LT |
2113 | spin_unlock(&journal->j_state_lock); |
2114 | } | |
2115 | ||
eee194e7 ES |
2116 | static journal_t *ext3_get_journal(struct super_block *sb, |
2117 | unsigned int journal_inum) | |
1da177e4 LT |
2118 | { |
2119 | struct inode *journal_inode; | |
2120 | journal_t *journal; | |
2121 | ||
2122 | /* First, test for the existence of a valid inode on disk. Bad | |
2123 | * things happen if we iget() an unused inode, as the subsequent | |
2124 | * iput() will try to delete it. */ | |
2125 | ||
473043dc DH |
2126 | journal_inode = ext3_iget(sb, journal_inum); |
2127 | if (IS_ERR(journal_inode)) { | |
4cf46b67 | 2128 | ext3_msg(sb, KERN_ERR, "error: no journal found"); |
1da177e4 LT |
2129 | return NULL; |
2130 | } | |
2131 | if (!journal_inode->i_nlink) { | |
2132 | make_bad_inode(journal_inode); | |
2133 | iput(journal_inode); | |
4cf46b67 | 2134 | ext3_msg(sb, KERN_ERR, "error: journal inode is deleted"); |
1da177e4 LT |
2135 | return NULL; |
2136 | } | |
2137 | ||
2138 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", | |
2139 | journal_inode, journal_inode->i_size); | |
473043dc | 2140 | if (!S_ISREG(journal_inode->i_mode)) { |
4cf46b67 | 2141 | ext3_msg(sb, KERN_ERR, "error: invalid journal inode"); |
1da177e4 LT |
2142 | iput(journal_inode); |
2143 | return NULL; | |
2144 | } | |
2145 | ||
2146 | journal = journal_init_inode(journal_inode); | |
2147 | if (!journal) { | |
4cf46b67 | 2148 | ext3_msg(sb, KERN_ERR, "error: could not load journal inode"); |
1da177e4 LT |
2149 | iput(journal_inode); |
2150 | return NULL; | |
2151 | } | |
2152 | journal->j_private = sb; | |
2153 | ext3_init_journal_params(sb, journal); | |
2154 | return journal; | |
2155 | } | |
2156 | ||
2157 | static journal_t *ext3_get_dev_journal(struct super_block *sb, | |
2158 | dev_t j_dev) | |
2159 | { | |
2160 | struct buffer_head * bh; | |
2161 | journal_t *journal; | |
43d23f90 | 2162 | ext3_fsblk_t start; |
1c2bf374 | 2163 | ext3_fsblk_t len; |
1da177e4 | 2164 | int hblock, blocksize; |
43d23f90 | 2165 | ext3_fsblk_t sb_block; |
1da177e4 LT |
2166 | unsigned long offset; |
2167 | struct ext3_super_block * es; | |
2168 | struct block_device *bdev; | |
2169 | ||
4cf46b67 | 2170 | bdev = ext3_blkdev_get(j_dev, sb); |
1da177e4 LT |
2171 | if (bdev == NULL) |
2172 | return NULL; | |
2173 | ||
1da177e4 | 2174 | blocksize = sb->s_blocksize; |
e1defc4f | 2175 | hblock = bdev_logical_block_size(bdev); |
1da177e4 | 2176 | if (blocksize < hblock) { |
4cf46b67 AF |
2177 | ext3_msg(sb, KERN_ERR, |
2178 | "error: blocksize too small for journal device"); | |
1da177e4 LT |
2179 | goto out_bdev; |
2180 | } | |
2181 | ||
2182 | sb_block = EXT3_MIN_BLOCK_SIZE / blocksize; | |
2183 | offset = EXT3_MIN_BLOCK_SIZE % blocksize; | |
2184 | set_blocksize(bdev, blocksize); | |
2185 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
4cf46b67 AF |
2186 | ext3_msg(sb, KERN_ERR, "error: couldn't read superblock of " |
2187 | "external journal"); | |
1da177e4 LT |
2188 | goto out_bdev; |
2189 | } | |
2190 | ||
57e94d86 | 2191 | es = (struct ext3_super_block *) (bh->b_data + offset); |
1da177e4 LT |
2192 | if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) || |
2193 | !(le32_to_cpu(es->s_feature_incompat) & | |
2194 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
4cf46b67 AF |
2195 | ext3_msg(sb, KERN_ERR, "error: external journal has " |
2196 | "bad superblock"); | |
1da177e4 LT |
2197 | brelse(bh); |
2198 | goto out_bdev; | |
2199 | } | |
2200 | ||
2201 | if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { | |
4cf46b67 | 2202 | ext3_msg(sb, KERN_ERR, "error: journal UUID does not match"); |
1da177e4 LT |
2203 | brelse(bh); |
2204 | goto out_bdev; | |
2205 | } | |
2206 | ||
2207 | len = le32_to_cpu(es->s_blocks_count); | |
2208 | start = sb_block + 1; | |
2209 | brelse(bh); /* we're done with the superblock */ | |
2210 | ||
2211 | journal = journal_init_dev(bdev, sb->s_bdev, | |
2212 | start, len, blocksize); | |
2213 | if (!journal) { | |
4cf46b67 AF |
2214 | ext3_msg(sb, KERN_ERR, |
2215 | "error: failed to create device journal"); | |
1da177e4 LT |
2216 | goto out_bdev; |
2217 | } | |
2218 | journal->j_private = sb; | |
2219 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2220 | wait_on_buffer(journal->j_sb_buffer); | |
2221 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
4cf46b67 | 2222 | ext3_msg(sb, KERN_ERR, "I/O error on journal device"); |
1da177e4 LT |
2223 | goto out_journal; |
2224 | } | |
2225 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
4cf46b67 AF |
2226 | ext3_msg(sb, KERN_ERR, |
2227 | "error: external journal has more than one " | |
2228 | "user (unsupported) - %d", | |
1da177e4 LT |
2229 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
2230 | goto out_journal; | |
2231 | } | |
2232 | EXT3_SB(sb)->journal_bdev = bdev; | |
2233 | ext3_init_journal_params(sb, journal); | |
2234 | return journal; | |
2235 | out_journal: | |
2236 | journal_destroy(journal); | |
2237 | out_bdev: | |
2238 | ext3_blkdev_put(bdev); | |
2239 | return NULL; | |
2240 | } | |
2241 | ||
71b96257 JL |
2242 | static int ext3_load_journal(struct super_block *sb, |
2243 | struct ext3_super_block *es, | |
2244 | unsigned long journal_devnum) | |
1da177e4 LT |
2245 | { |
2246 | journal_t *journal; | |
eee194e7 | 2247 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
71b96257 | 2248 | dev_t journal_dev; |
1da177e4 LT |
2249 | int err = 0; |
2250 | int really_read_only; | |
2251 | ||
71b96257 JL |
2252 | if (journal_devnum && |
2253 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
4cf46b67 AF |
2254 | ext3_msg(sb, KERN_INFO, "external journal device major/minor " |
2255 | "numbers have changed"); | |
71b96257 JL |
2256 | journal_dev = new_decode_dev(journal_devnum); |
2257 | } else | |
2258 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2259 | ||
1da177e4 LT |
2260 | really_read_only = bdev_read_only(sb->s_bdev); |
2261 | ||
2262 | /* | |
2263 | * Are we loading a blank journal or performing recovery after a | |
2264 | * crash? For recovery, we need to check in advance whether we | |
2265 | * can get read-write access to the device. | |
2266 | */ | |
2267 | ||
2268 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) { | |
2269 | if (sb->s_flags & MS_RDONLY) { | |
4cf46b67 AF |
2270 | ext3_msg(sb, KERN_INFO, |
2271 | "recovery required on readonly filesystem"); | |
1da177e4 | 2272 | if (really_read_only) { |
4cf46b67 AF |
2273 | ext3_msg(sb, KERN_ERR, "error: write access " |
2274 | "unavailable, cannot proceed"); | |
1da177e4 LT |
2275 | return -EROFS; |
2276 | } | |
4cf46b67 AF |
2277 | ext3_msg(sb, KERN_INFO, |
2278 | "write access will be enabled during recovery"); | |
1da177e4 LT |
2279 | } |
2280 | } | |
2281 | ||
2282 | if (journal_inum && journal_dev) { | |
4cf46b67 AF |
2283 | ext3_msg(sb, KERN_ERR, "error: filesystem has both journal " |
2284 | "and inode journals"); | |
1da177e4 LT |
2285 | return -EINVAL; |
2286 | } | |
2287 | ||
2288 | if (journal_inum) { | |
2289 | if (!(journal = ext3_get_journal(sb, journal_inum))) | |
2290 | return -EINVAL; | |
2291 | } else { | |
2292 | if (!(journal = ext3_get_dev_journal(sb, journal_dev))) | |
2293 | return -EINVAL; | |
2294 | } | |
2295 | ||
0636c73e ES |
2296 | if (!(journal->j_flags & JFS_BARRIER)) |
2297 | printk(KERN_INFO "EXT3-fs: barriers not enabled\n"); | |
2298 | ||
1da177e4 LT |
2299 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
2300 | err = journal_update_format(journal); | |
2301 | if (err) { | |
4cf46b67 | 2302 | ext3_msg(sb, KERN_ERR, "error updating journal"); |
1da177e4 LT |
2303 | journal_destroy(journal); |
2304 | return err; | |
2305 | } | |
2306 | } | |
2307 | ||
2308 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) | |
2309 | err = journal_wipe(journal, !really_read_only); | |
2310 | if (!err) | |
2311 | err = journal_load(journal); | |
2312 | ||
2313 | if (err) { | |
4cf46b67 | 2314 | ext3_msg(sb, KERN_ERR, "error loading journal"); |
1da177e4 LT |
2315 | journal_destroy(journal); |
2316 | return err; | |
2317 | } | |
2318 | ||
2319 | EXT3_SB(sb)->s_journal = journal; | |
2320 | ext3_clear_journal_err(sb, es); | |
71b96257 | 2321 | |
31d710a7 | 2322 | if (!really_read_only && journal_devnum && |
71b96257 JL |
2323 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
2324 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
71b96257 JL |
2325 | |
2326 | /* Make sure we flush the recovery flag to disk. */ | |
2327 | ext3_commit_super(sb, es, 1); | |
2328 | } | |
2329 | ||
1da177e4 LT |
2330 | return 0; |
2331 | } | |
2332 | ||
4cf46b67 AF |
2333 | static int ext3_create_journal(struct super_block *sb, |
2334 | struct ext3_super_block *es, | |
eee194e7 | 2335 | unsigned int journal_inum) |
1da177e4 LT |
2336 | { |
2337 | journal_t *journal; | |
952d9de1 | 2338 | int err; |
1da177e4 LT |
2339 | |
2340 | if (sb->s_flags & MS_RDONLY) { | |
4cf46b67 AF |
2341 | ext3_msg(sb, KERN_ERR, |
2342 | "error: readonly filesystem when trying to " | |
2343 | "create journal"); | |
1da177e4 LT |
2344 | return -EROFS; |
2345 | } | |
2346 | ||
952d9de1 BP |
2347 | journal = ext3_get_journal(sb, journal_inum); |
2348 | if (!journal) | |
1da177e4 LT |
2349 | return -EINVAL; |
2350 | ||
4cf46b67 | 2351 | ext3_msg(sb, KERN_INFO, "creating new journal on inode %u", |
1da177e4 LT |
2352 | journal_inum); |
2353 | ||
952d9de1 BP |
2354 | err = journal_create(journal); |
2355 | if (err) { | |
4cf46b67 | 2356 | ext3_msg(sb, KERN_ERR, "error creating journal"); |
1da177e4 LT |
2357 | journal_destroy(journal); |
2358 | return -EIO; | |
2359 | } | |
2360 | ||
2361 | EXT3_SB(sb)->s_journal = journal; | |
2362 | ||
2363 | ext3_update_dynamic_rev(sb); | |
2364 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2365 | EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL); | |
2366 | ||
2367 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
1da177e4 LT |
2368 | |
2369 | /* Make sure we flush the recovery flag to disk. */ | |
2370 | ext3_commit_super(sb, es, 1); | |
2371 | ||
2372 | return 0; | |
2373 | } | |
2374 | ||
c4be0c1d TS |
2375 | static int ext3_commit_super(struct super_block *sb, |
2376 | struct ext3_super_block *es, | |
1da177e4 LT |
2377 | int sync) |
2378 | { | |
2379 | struct buffer_head *sbh = EXT3_SB(sb)->s_sbh; | |
c4be0c1d | 2380 | int error = 0; |
1da177e4 LT |
2381 | |
2382 | if (!sbh) | |
c4be0c1d | 2383 | return error; |
dff6825e DW |
2384 | |
2385 | if (buffer_write_io_error(sbh)) { | |
2386 | /* | |
2387 | * Oh, dear. A previous attempt to write the | |
2388 | * superblock failed. This could happen because the | |
2389 | * USB device was yanked out. Or it could happen to | |
2390 | * be a transient write error and maybe the block will | |
2391 | * be remapped. Nothing we can do but to retry the | |
2392 | * write and hope for the best. | |
2393 | */ | |
2394 | ext3_msg(sb, KERN_ERR, "previous I/O error to " | |
2395 | "superblock detected"); | |
2396 | clear_buffer_write_io_error(sbh); | |
2397 | set_buffer_uptodate(sbh); | |
2398 | } | |
96ec2e0a TT |
2399 | /* |
2400 | * If the file system is mounted read-only, don't update the | |
2401 | * superblock write time. This avoids updating the superblock | |
2402 | * write time when we are mounting the root file system | |
2403 | * read/only but we need to replay the journal; at that point, | |
2404 | * for people who are east of GMT and who make their clock | |
2405 | * tick in localtime for Windows bug-for-bug compatibility, | |
2406 | * the clock is set in the future, and this will cause e2fsck | |
2407 | * to complain and force a full file system check. | |
2408 | */ | |
2409 | if (!(sb->s_flags & MS_RDONLY)) | |
2410 | es->s_wtime = cpu_to_le32(get_seconds()); | |
1da177e4 LT |
2411 | es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb)); |
2412 | es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb)); | |
2413 | BUFFER_TRACE(sbh, "marking dirty"); | |
2414 | mark_buffer_dirty(sbh); | |
dff6825e | 2415 | if (sync) { |
c4be0c1d | 2416 | error = sync_dirty_buffer(sbh); |
dff6825e DW |
2417 | if (buffer_write_io_error(sbh)) { |
2418 | ext3_msg(sb, KERN_ERR, "I/O error while writing " | |
2419 | "superblock"); | |
2420 | clear_buffer_write_io_error(sbh); | |
2421 | set_buffer_uptodate(sbh); | |
2422 | } | |
2423 | } | |
c4be0c1d | 2424 | return error; |
1da177e4 LT |
2425 | } |
2426 | ||
2427 | ||
2428 | /* | |
2429 | * Have we just finished recovery? If so, and if we are mounting (or | |
2430 | * remounting) the filesystem readonly, then we will end up with a | |
2431 | * consistent fs on disk. Record that fact. | |
2432 | */ | |
2433 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
2434 | struct ext3_super_block * es) | |
2435 | { | |
2436 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
2437 | ||
2438 | journal_lock_updates(journal); | |
2d7c820e HK |
2439 | if (journal_flush(journal) < 0) |
2440 | goto out; | |
2441 | ||
1da177e4 LT |
2442 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) && |
2443 | sb->s_flags & MS_RDONLY) { | |
2444 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1da177e4 LT |
2445 | ext3_commit_super(sb, es, 1); |
2446 | } | |
2d7c820e HK |
2447 | |
2448 | out: | |
1da177e4 LT |
2449 | journal_unlock_updates(journal); |
2450 | } | |
2451 | ||
2452 | /* | |
2453 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2454 | * has recorded an error from a previous lifetime, move that error to the | |
2455 | * main filesystem now. | |
2456 | */ | |
4cf46b67 AF |
2457 | static void ext3_clear_journal_err(struct super_block *sb, |
2458 | struct ext3_super_block *es) | |
1da177e4 LT |
2459 | { |
2460 | journal_t *journal; | |
2461 | int j_errno; | |
2462 | const char *errstr; | |
2463 | ||
2464 | journal = EXT3_SB(sb)->s_journal; | |
2465 | ||
2466 | /* | |
2467 | * Now check for any error status which may have been recorded in the | |
2468 | * journal by a prior ext3_error() or ext3_abort() | |
2469 | */ | |
2470 | ||
2471 | j_errno = journal_errno(journal); | |
2472 | if (j_errno) { | |
2473 | char nbuf[16]; | |
2474 | ||
2475 | errstr = ext3_decode_error(sb, j_errno, nbuf); | |
e05b6b52 | 2476 | ext3_warning(sb, __func__, "Filesystem error recorded " |
1da177e4 | 2477 | "from previous mount: %s", errstr); |
e05b6b52 | 2478 | ext3_warning(sb, __func__, "Marking fs in need of " |
1da177e4 LT |
2479 | "filesystem check."); |
2480 | ||
2481 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
2482 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
2483 | ext3_commit_super (sb, es, 1); | |
2484 | ||
2485 | journal_clear_err(journal); | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | /* | |
2490 | * Force the running and committing transactions to commit, | |
2491 | * and wait on the commit. | |
2492 | */ | |
2493 | int ext3_force_commit(struct super_block *sb) | |
2494 | { | |
2495 | journal_t *journal; | |
2496 | int ret; | |
2497 | ||
2498 | if (sb->s_flags & MS_RDONLY) | |
2499 | return 0; | |
2500 | ||
2501 | journal = EXT3_SB(sb)->s_journal; | |
1da177e4 LT |
2502 | ret = ext3_journal_force_commit(journal); |
2503 | return ret; | |
2504 | } | |
2505 | ||
1da177e4 LT |
2506 | static int ext3_sync_fs(struct super_block *sb, int wait) |
2507 | { | |
02ac597c | 2508 | tid_t target; |
c87591b7 | 2509 | |
02ac597c JK |
2510 | if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { |
2511 | if (wait) | |
2512 | log_wait_commit(EXT3_SB(sb)->s_journal, target); | |
2513 | } | |
1da177e4 LT |
2514 | return 0; |
2515 | } | |
2516 | ||
2517 | /* | |
2518 | * LVM calls this function before a (read-only) snapshot is created. This | |
2519 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2520 | */ | |
c4be0c1d | 2521 | static int ext3_freeze(struct super_block *sb) |
1da177e4 | 2522 | { |
c4be0c1d TS |
2523 | int error = 0; |
2524 | journal_t *journal; | |
1da177e4 LT |
2525 | |
2526 | if (!(sb->s_flags & MS_RDONLY)) { | |
c4be0c1d | 2527 | journal = EXT3_SB(sb)->s_journal; |
1da177e4 LT |
2528 | |
2529 | /* Now we set up the journal barrier. */ | |
2530 | journal_lock_updates(journal); | |
2d7c820e HK |
2531 | |
2532 | /* | |
2533 | * We don't want to clear needs_recovery flag when we failed | |
2534 | * to flush the journal. | |
2535 | */ | |
c4be0c1d TS |
2536 | error = journal_flush(journal); |
2537 | if (error < 0) | |
2538 | goto out; | |
1da177e4 LT |
2539 | |
2540 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
2541 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
c4be0c1d TS |
2542 | error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); |
2543 | if (error) | |
2544 | goto out; | |
1da177e4 | 2545 | } |
c4be0c1d TS |
2546 | return 0; |
2547 | ||
2548 | out: | |
2549 | journal_unlock_updates(journal); | |
2550 | return error; | |
1da177e4 LT |
2551 | } |
2552 | ||
2553 | /* | |
2554 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2555 | * flag here, even though the filesystem is not technically dirty yet. | |
2556 | */ | |
c4be0c1d | 2557 | static int ext3_unfreeze(struct super_block *sb) |
1da177e4 LT |
2558 | { |
2559 | if (!(sb->s_flags & MS_RDONLY)) { | |
2560 | lock_super(sb); | |
2561 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
2562 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2563 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); | |
2564 | unlock_super(sb); | |
2565 | journal_unlock_updates(EXT3_SB(sb)->s_journal); | |
2566 | } | |
c4be0c1d | 2567 | return 0; |
1da177e4 LT |
2568 | } |
2569 | ||
2570 | static int ext3_remount (struct super_block * sb, int * flags, char * data) | |
2571 | { | |
2572 | struct ext3_super_block * es; | |
2573 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 2574 | ext3_fsblk_t n_blocks_count = 0; |
08c6a96f JK |
2575 | unsigned long old_sb_flags; |
2576 | struct ext3_mount_options old_opts; | |
c79d967d | 2577 | int enable_quota = 0; |
08c6a96f JK |
2578 | int err; |
2579 | #ifdef CONFIG_QUOTA | |
2580 | int i; | |
2581 | #endif | |
2582 | ||
2583 | /* Store the original options */ | |
bbd6851a | 2584 | lock_super(sb); |
08c6a96f JK |
2585 | old_sb_flags = sb->s_flags; |
2586 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2587 | old_opts.s_resuid = sbi->s_resuid; | |
2588 | old_opts.s_resgid = sbi->s_resgid; | |
2589 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2590 | #ifdef CONFIG_QUOTA | |
2591 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
2592 | for (i = 0; i < MAXQUOTAS; i++) | |
2593 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
2594 | #endif | |
1da177e4 LT |
2595 | |
2596 | /* | |
2597 | * Allow the "check" option to be passed as a remount option. | |
2598 | */ | |
71b96257 | 2599 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { |
08c6a96f JK |
2600 | err = -EINVAL; |
2601 | goto restore_opts; | |
2602 | } | |
1da177e4 | 2603 | |
e3c96435 | 2604 | if (test_opt(sb, ABORT)) |
e05b6b52 | 2605 | ext3_abort(sb, __func__, "Abort forced by user"); |
1da177e4 LT |
2606 | |
2607 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
e3c96435 | 2608 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
1da177e4 LT |
2609 | |
2610 | es = sbi->s_es; | |
2611 | ||
2612 | ext3_init_journal_params(sb, sbi->s_journal); | |
2613 | ||
2614 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
2615 | n_blocks_count > le32_to_cpu(es->s_blocks_count)) { | |
e3c96435 | 2616 | if (test_opt(sb, ABORT)) { |
08c6a96f JK |
2617 | err = -EROFS; |
2618 | goto restore_opts; | |
2619 | } | |
1da177e4 LT |
2620 | |
2621 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
2622 | err = dquot_suspend(sb, -1); |
2623 | if (err < 0) | |
c79d967d | 2624 | goto restore_opts; |
c79d967d | 2625 | |
1da177e4 LT |
2626 | /* |
2627 | * First of all, the unconditional stuff we have to do | |
2628 | * to disable replay of the journal when we next remount | |
2629 | */ | |
2630 | sb->s_flags |= MS_RDONLY; | |
2631 | ||
2632 | /* | |
2633 | * OK, test if we are remounting a valid rw partition | |
2634 | * readonly, and if so set the rdonly flag and then | |
2635 | * mark the partition as valid again. | |
2636 | */ | |
2637 | if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) && | |
2638 | (sbi->s_mount_state & EXT3_VALID_FS)) | |
2639 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
2640 | ||
2641 | ext3_mark_recovery_complete(sb, es); | |
2642 | } else { | |
2643 | __le32 ret; | |
2644 | if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb, | |
2645 | ~EXT3_FEATURE_RO_COMPAT_SUPP))) { | |
4cf46b67 AF |
2646 | ext3_msg(sb, KERN_WARNING, |
2647 | "warning: couldn't remount RDWR " | |
2648 | "because of unsupported optional " | |
2649 | "features (%x)", le32_to_cpu(ret)); | |
08c6a96f JK |
2650 | err = -EROFS; |
2651 | goto restore_opts; | |
1da177e4 | 2652 | } |
ea9a05a1 ES |
2653 | |
2654 | /* | |
2655 | * If we have an unprocessed orphan list hanging | |
2656 | * around from a previously readonly bdev mount, | |
2657 | * require a full umount/remount for now. | |
2658 | */ | |
2659 | if (es->s_last_orphan) { | |
4cf46b67 | 2660 | ext3_msg(sb, KERN_WARNING, "warning: couldn't " |
ea9a05a1 ES |
2661 | "remount RDWR because of unprocessed " |
2662 | "orphan inode list. Please " | |
4cf46b67 | 2663 | "umount/remount instead."); |
ea9a05a1 ES |
2664 | err = -EINVAL; |
2665 | goto restore_opts; | |
2666 | } | |
2667 | ||
1da177e4 LT |
2668 | /* |
2669 | * Mounting a RDONLY partition read-write, so reread | |
2670 | * and store the current valid flag. (It may have | |
2671 | * been changed by e2fsck since we originally mounted | |
2672 | * the partition.) | |
2673 | */ | |
2674 | ext3_clear_journal_err(sb, es); | |
2675 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
a4e4de36 | 2676 | if ((err = ext3_group_extend(sb, es, n_blocks_count))) |
08c6a96f | 2677 | goto restore_opts; |
1da177e4 LT |
2678 | if (!ext3_setup_super (sb, es, 0)) |
2679 | sb->s_flags &= ~MS_RDONLY; | |
c79d967d | 2680 | enable_quota = 1; |
1da177e4 LT |
2681 | } |
2682 | } | |
08c6a96f JK |
2683 | #ifdef CONFIG_QUOTA |
2684 | /* Release old quota file names */ | |
2685 | for (i = 0; i < MAXQUOTAS; i++) | |
2686 | if (old_opts.s_qf_names[i] && | |
2687 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2688 | kfree(old_opts.s_qf_names[i]); | |
2689 | #endif | |
bbd6851a | 2690 | unlock_super(sb); |
c79d967d CH |
2691 | |
2692 | if (enable_quota) | |
0f0dd62f | 2693 | dquot_resume(sb, -1); |
1da177e4 | 2694 | return 0; |
08c6a96f JK |
2695 | restore_opts: |
2696 | sb->s_flags = old_sb_flags; | |
2697 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
2698 | sbi->s_resuid = old_opts.s_resuid; | |
2699 | sbi->s_resgid = old_opts.s_resgid; | |
2700 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
2701 | #ifdef CONFIG_QUOTA | |
2702 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
2703 | for (i = 0; i < MAXQUOTAS; i++) { | |
2704 | if (sbi->s_qf_names[i] && | |
2705 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2706 | kfree(sbi->s_qf_names[i]); | |
2707 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
2708 | } | |
2709 | #endif | |
bbd6851a | 2710 | unlock_super(sb); |
08c6a96f | 2711 | return err; |
1da177e4 LT |
2712 | } |
2713 | ||
726c3342 | 2714 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf) |
1da177e4 | 2715 | { |
726c3342 | 2716 | struct super_block *sb = dentry->d_sb; |
09fe316a AT |
2717 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
2718 | struct ext3_super_block *es = sbi->s_es; | |
50ee0a32 | 2719 | u64 fsid; |
1da177e4 | 2720 | |
a71ce8c6 BP |
2721 | if (test_opt(sb, MINIX_DF)) { |
2722 | sbi->s_overhead_last = 0; | |
2723 | } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { | |
2724 | unsigned long ngroups = sbi->s_groups_count, i; | |
2725 | ext3_fsblk_t overhead = 0; | |
1da177e4 LT |
2726 | smp_rmb(); |
2727 | ||
2728 | /* | |
a71ce8c6 BP |
2729 | * Compute the overhead (FS structures). This is constant |
2730 | * for a given filesystem unless the number of block groups | |
2731 | * changes so we cache the previous value until it does. | |
1da177e4 LT |
2732 | */ |
2733 | ||
2734 | /* | |
2735 | * All of the blocks before first_data_block are | |
2736 | * overhead | |
2737 | */ | |
2738 | overhead = le32_to_cpu(es->s_first_data_block); | |
2739 | ||
2740 | /* | |
2741 | * Add the overhead attributed to the superblock and | |
2742 | * block group descriptors. If the sparse superblocks | |
2743 | * feature is turned on, then not all groups have this. | |
2744 | */ | |
2745 | for (i = 0; i < ngroups; i++) { | |
2746 | overhead += ext3_bg_has_super(sb, i) + | |
2747 | ext3_bg_num_gdb(sb, i); | |
2748 | cond_resched(); | |
2749 | } | |
2750 | ||
2751 | /* | |
2752 | * Every block group has an inode bitmap, a block | |
2753 | * bitmap, and an inode table. | |
2754 | */ | |
a71ce8c6 BP |
2755 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
2756 | sbi->s_overhead_last = overhead; | |
2757 | smp_wmb(); | |
2758 | sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); | |
1da177e4 LT |
2759 | } |
2760 | ||
2761 | buf->f_type = EXT3_SUPER_MAGIC; | |
2762 | buf->f_bsize = sb->s_blocksize; | |
a71ce8c6 | 2763 | buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last; |
52d9f3b4 | 2764 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); |
1da177e4 LT |
2765 | buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); |
2766 | if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) | |
2767 | buf->f_bavail = 0; | |
2768 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 2769 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
1da177e4 | 2770 | buf->f_namelen = EXT3_NAME_LEN; |
50ee0a32 PE |
2771 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
2772 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
2773 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
2774 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
1da177e4 LT |
2775 | return 0; |
2776 | } | |
2777 | ||
2778 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
2779 | * is locked for write. Otherwise the are possible deadlocks: | |
2780 | * Process 1 Process 2 | |
2781 | * ext3_create() quota_sync() | |
2782 | * journal_start() write_dquot() | |
871a2931 | 2783 | * dquot_initialize() down(dqio_mutex) |
d3be915f | 2784 | * down(dqio_mutex) journal_start() |
1da177e4 LT |
2785 | * |
2786 | */ | |
2787 | ||
2788 | #ifdef CONFIG_QUOTA | |
2789 | ||
2790 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
2791 | { | |
2792 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
2793 | } | |
2794 | ||
1da177e4 LT |
2795 | static int ext3_write_dquot(struct dquot *dquot) |
2796 | { | |
2797 | int ret, err; | |
2798 | handle_t *handle; | |
2799 | struct inode *inode; | |
2800 | ||
2801 | inode = dquot_to_inode(dquot); | |
2802 | handle = ext3_journal_start(inode, | |
1f54587b | 2803 | EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2804 | if (IS_ERR(handle)) |
2805 | return PTR_ERR(handle); | |
2806 | ret = dquot_commit(dquot); | |
2807 | err = ext3_journal_stop(handle); | |
2808 | if (!ret) | |
2809 | ret = err; | |
2810 | return ret; | |
2811 | } | |
2812 | ||
2813 | static int ext3_acquire_dquot(struct dquot *dquot) | |
2814 | { | |
2815 | int ret, err; | |
2816 | handle_t *handle; | |
2817 | ||
2818 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2819 | EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2820 | if (IS_ERR(handle)) |
2821 | return PTR_ERR(handle); | |
2822 | ret = dquot_acquire(dquot); | |
2823 | err = ext3_journal_stop(handle); | |
2824 | if (!ret) | |
2825 | ret = err; | |
2826 | return ret; | |
2827 | } | |
2828 | ||
2829 | static int ext3_release_dquot(struct dquot *dquot) | |
2830 | { | |
2831 | int ret, err; | |
2832 | handle_t *handle; | |
2833 | ||
2834 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2835 | EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
2836 | if (IS_ERR(handle)) { |
2837 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2838 | dquot_release(dquot); | |
1da177e4 | 2839 | return PTR_ERR(handle); |
9c3013e9 | 2840 | } |
1da177e4 LT |
2841 | ret = dquot_release(dquot); |
2842 | err = ext3_journal_stop(handle); | |
2843 | if (!ret) | |
2844 | ret = err; | |
2845 | return ret; | |
2846 | } | |
2847 | ||
2848 | static int ext3_mark_dquot_dirty(struct dquot *dquot) | |
2849 | { | |
99aeaf63 | 2850 | /* Are we journaling quotas? */ |
1da177e4 LT |
2851 | if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2852 | EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2853 | dquot_mark_dquot_dirty(dquot); | |
2854 | return ext3_write_dquot(dquot); | |
2855 | } else { | |
2856 | return dquot_mark_dquot_dirty(dquot); | |
2857 | } | |
2858 | } | |
2859 | ||
2860 | static int ext3_write_info(struct super_block *sb, int type) | |
2861 | { | |
2862 | int ret, err; | |
2863 | handle_t *handle; | |
2864 | ||
2865 | /* Data block + inode block */ | |
2866 | handle = ext3_journal_start(sb->s_root->d_inode, 2); | |
2867 | if (IS_ERR(handle)) | |
2868 | return PTR_ERR(handle); | |
2869 | ret = dquot_commit_info(sb, type); | |
2870 | err = ext3_journal_stop(handle); | |
2871 | if (!ret) | |
2872 | ret = err; | |
2873 | return ret; | |
2874 | } | |
2875 | ||
2876 | /* | |
2877 | * Turn on quotas during mount time - we need to find | |
2878 | * the quota file and such... | |
2879 | */ | |
2880 | static int ext3_quota_on_mount(struct super_block *sb, int type) | |
2881 | { | |
287a8095 CH |
2882 | return dquot_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type], |
2883 | EXT3_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2884 | } |
2885 | ||
2886 | /* | |
2887 | * Standard function to be called on quota_on | |
2888 | */ | |
2889 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, | |
f00c9e44 | 2890 | struct path *path) |
1da177e4 LT |
2891 | { |
2892 | int err; | |
1da177e4 | 2893 | |
1f54587b JK |
2894 | if (!test_opt(sb, QUOTA)) |
2895 | return -EINVAL; | |
9cfe7b90 | 2896 | |
1da177e4 | 2897 | /* Quotafile not on the same filesystem? */ |
f00c9e44 | 2898 | if (path->mnt->mnt_sb != sb) |
1da177e4 | 2899 | return -EXDEV; |
9cfe7b90 JK |
2900 | /* Journaling quota? */ |
2901 | if (EXT3_SB(sb)->s_qf_names[type]) { | |
2902 | /* Quotafile not of fs root? */ | |
f00c9e44 | 2903 | if (path->dentry->d_parent != sb->s_root) |
4cf46b67 AF |
2904 | ext3_msg(sb, KERN_WARNING, |
2905 | "warning: Quota file not on filesystem root. " | |
2906 | "Journaled quota will not work."); | |
9cfe7b90 JK |
2907 | } |
2908 | ||
2909 | /* | |
2910 | * When we journal data on quota file, we have to flush journal to see | |
2911 | * all updates to the file when we bypass pagecache... | |
2912 | */ | |
f00c9e44 | 2913 | if (ext3_should_journal_data(path->dentry->d_inode)) { |
9cfe7b90 JK |
2914 | /* |
2915 | * We don't need to lock updates but journal_flush() could | |
2916 | * otherwise be livelocked... | |
2917 | */ | |
2918 | journal_lock_updates(EXT3_SB(sb)->s_journal); | |
2d7c820e | 2919 | err = journal_flush(EXT3_SB(sb)->s_journal); |
9cfe7b90 | 2920 | journal_unlock_updates(EXT3_SB(sb)->s_journal); |
f00c9e44 | 2921 | if (err) |
2d7c820e | 2922 | return err; |
9cfe7b90 JK |
2923 | } |
2924 | ||
f00c9e44 | 2925 | return dquot_quota_on(sb, type, format_id, path); |
1da177e4 LT |
2926 | } |
2927 | ||
2928 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2929 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 2930 | * itself serializes the operations (and no one else should touch the files) |
1da177e4 LT |
2931 | * we don't have to be afraid of races */ |
2932 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
2933 | size_t len, loff_t off) | |
2934 | { | |
2935 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2936 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2937 | int err = 0; | |
2938 | int offset = off & (sb->s_blocksize - 1); | |
2939 | int tocopy; | |
2940 | size_t toread; | |
2941 | struct buffer_head *bh; | |
2942 | loff_t i_size = i_size_read(inode); | |
2943 | ||
2944 | if (off > i_size) | |
2945 | return 0; | |
2946 | if (off+len > i_size) | |
2947 | len = i_size-off; | |
2948 | toread = len; | |
2949 | while (toread > 0) { | |
2950 | tocopy = sb->s_blocksize - offset < toread ? | |
2951 | sb->s_blocksize - offset : toread; | |
2952 | bh = ext3_bread(NULL, inode, blk, 0, &err); | |
2953 | if (err) | |
2954 | return err; | |
2955 | if (!bh) /* A hole? */ | |
2956 | memset(data, 0, tocopy); | |
2957 | else | |
2958 | memcpy(data, bh->b_data+offset, tocopy); | |
2959 | brelse(bh); | |
2960 | offset = 0; | |
2961 | toread -= tocopy; | |
2962 | data += tocopy; | |
2963 | blk++; | |
2964 | } | |
2965 | return len; | |
2966 | } | |
2967 | ||
2968 | /* Write to quotafile (we know the transaction is already started and has | |
2969 | * enough credits) */ | |
2970 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
2971 | const char *data, size_t len, loff_t off) | |
2972 | { | |
2973 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2974 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2975 | int err = 0; | |
2976 | int offset = off & (sb->s_blocksize - 1); | |
1da177e4 | 2977 | int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL; |
1da177e4 LT |
2978 | struct buffer_head *bh; |
2979 | handle_t *handle = journal_current_handle(); | |
2980 | ||
9c3013e9 | 2981 | if (!handle) { |
4cf46b67 AF |
2982 | ext3_msg(sb, KERN_WARNING, |
2983 | "warning: quota write (off=%llu, len=%llu)" | |
2984 | " cancelled because transaction is not started.", | |
9c3013e9 JK |
2985 | (unsigned long long)off, (unsigned long long)len); |
2986 | return -EIO; | |
2987 | } | |
e5472147 DM |
2988 | |
2989 | /* | |
2990 | * Since we account only one data block in transaction credits, | |
2991 | * then it is impossible to cross a block boundary. | |
2992 | */ | |
2993 | if (sb->s_blocksize - offset < len) { | |
2994 | ext3_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
2995 | " cancelled because not block aligned", | |
2996 | (unsigned long long)off, (unsigned long long)len); | |
2997 | return -EIO; | |
2998 | } | |
5c81a419 | 2999 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
e5472147 DM |
3000 | bh = ext3_bread(handle, inode, blk, 1, &err); |
3001 | if (!bh) | |
3002 | goto out; | |
3003 | if (journal_quota) { | |
3004 | err = ext3_journal_get_write_access(handle, bh); | |
3005 | if (err) { | |
3006 | brelse(bh); | |
1da177e4 | 3007 | goto out; |
1da177e4 | 3008 | } |
1da177e4 | 3009 | } |
e5472147 DM |
3010 | lock_buffer(bh); |
3011 | memcpy(bh->b_data+offset, data, len); | |
3012 | flush_dcache_page(bh->b_page); | |
3013 | unlock_buffer(bh); | |
3014 | if (journal_quota) | |
3015 | err = ext3_journal_dirty_metadata(handle, bh); | |
3016 | else { | |
3017 | /* Always do at least ordered writes for quotas */ | |
3018 | err = ext3_journal_dirty_data(handle, bh); | |
3019 | mark_buffer_dirty(bh); | |
3020 | } | |
3021 | brelse(bh); | |
1da177e4 | 3022 | out: |
e5472147 | 3023 | if (err) { |
f5c8f7da | 3024 | mutex_unlock(&inode->i_mutex); |
1da177e4 | 3025 | return err; |
f5c8f7da | 3026 | } |
e5472147 DM |
3027 | if (inode->i_size < off + len) { |
3028 | i_size_write(inode, off + len); | |
1da177e4 LT |
3029 | EXT3_I(inode)->i_disksize = inode->i_size; |
3030 | } | |
3031 | inode->i_version++; | |
3032 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
3033 | ext3_mark_inode_dirty(handle, inode); | |
1b1dcc1b | 3034 | mutex_unlock(&inode->i_mutex); |
e5472147 | 3035 | return len; |
1da177e4 LT |
3036 | } |
3037 | ||
3038 | #endif | |
3039 | ||
152a0836 AV |
3040 | static struct dentry *ext3_mount(struct file_system_type *fs_type, |
3041 | int flags, const char *dev_name, void *data) | |
1da177e4 | 3042 | { |
152a0836 | 3043 | return mount_bdev(fs_type, flags, dev_name, data, ext3_fill_super); |
1da177e4 LT |
3044 | } |
3045 | ||
3046 | static struct file_system_type ext3_fs_type = { | |
3047 | .owner = THIS_MODULE, | |
3048 | .name = "ext3", | |
152a0836 | 3049 | .mount = ext3_mount, |
1da177e4 LT |
3050 | .kill_sb = kill_block_super, |
3051 | .fs_flags = FS_REQUIRES_DEV, | |
3052 | }; | |
3053 | ||
3054 | static int __init init_ext3_fs(void) | |
3055 | { | |
3056 | int err = init_ext3_xattr(); | |
3057 | if (err) | |
3058 | return err; | |
3059 | err = init_inodecache(); | |
3060 | if (err) | |
3061 | goto out1; | |
3062 | err = register_filesystem(&ext3_fs_type); | |
3063 | if (err) | |
3064 | goto out; | |
3065 | return 0; | |
3066 | out: | |
3067 | destroy_inodecache(); | |
3068 | out1: | |
e9ad5620 | 3069 | exit_ext3_xattr(); |
1da177e4 LT |
3070 | return err; |
3071 | } | |
3072 | ||
3073 | static void __exit exit_ext3_fs(void) | |
3074 | { | |
3075 | unregister_filesystem(&ext3_fs_type); | |
3076 | destroy_inodecache(); | |
3077 | exit_ext3_xattr(); | |
3078 | } | |
3079 | ||
3080 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
3081 | MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions"); | |
3082 | MODULE_LICENSE("GPL"); | |
3083 | module_init(init_ext3_fs) | |
3084 | module_exit(exit_ext3_fs) |