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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 | 19 | #include <linux/module.h> |
1da177e4 LT |
20 | #include <linux/blkdev.h> |
21 | #include <linux/parser.h> | |
a5694255 | 22 | #include <linux/exportfs.h> |
4613ad18 | 23 | #include <linux/statfs.h> |
1da177e4 LT |
24 | #include <linux/random.h> |
25 | #include <linux/mount.h> | |
1da177e4 | 26 | #include <linux/quotaops.h> |
8fc2751b | 27 | #include <linux/seq_file.h> |
3fc74269 | 28 | #include <linux/log2.h> |
d71bc6db | 29 | #include <linux/cleancache.h> |
cf7eff46 | 30 | #include <linux/namei.h> |
381be254 | 31 | |
1da177e4 | 32 | #include <asm/uaccess.h> |
381be254 | 33 | |
4613ad18 AV |
34 | #define CREATE_TRACE_POINTS |
35 | ||
36 | #include "ext3.h" | |
1da177e4 LT |
37 | #include "xattr.h" |
38 | #include "acl.h" | |
381be254 | 39 | #include "namei.h" |
1da177e4 | 40 | |
bbae8bcc LT |
41 | #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED |
42 | #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA | |
43 | #else | |
44 | #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA | |
45 | #endif | |
46 | ||
71b96257 JL |
47 | static int ext3_load_journal(struct super_block *, struct ext3_super_block *, |
48 | unsigned long journal_devnum); | |
1da177e4 | 49 | static int ext3_create_journal(struct super_block *, struct ext3_super_block *, |
eee194e7 | 50 | unsigned int); |
c4be0c1d TS |
51 | static int ext3_commit_super(struct super_block *sb, |
52 | struct ext3_super_block *es, | |
1da177e4 LT |
53 | int sync); |
54 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
55 | struct ext3_super_block * es); | |
56 | static void ext3_clear_journal_err(struct super_block * sb, | |
57 | struct ext3_super_block * es); | |
58 | static int ext3_sync_fs(struct super_block *sb, int wait); | |
59 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
60 | char nbuf[16]); | |
61 | static int ext3_remount (struct super_block * sb, int * flags, char * data); | |
726c3342 | 62 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf); |
c4be0c1d | 63 | static int ext3_unfreeze(struct super_block *sb); |
c4be0c1d | 64 | static int ext3_freeze(struct super_block *sb); |
1da177e4 | 65 | |
ae6ddcc5 | 66 | /* |
1da177e4 | 67 | * Wrappers for journal_start/end. |
1da177e4 LT |
68 | */ |
69 | handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks) | |
70 | { | |
71 | journal_t *journal; | |
72 | ||
73 | if (sb->s_flags & MS_RDONLY) | |
74 | return ERR_PTR(-EROFS); | |
75 | ||
76 | /* Special case here: if the journal has aborted behind our | |
77 | * backs (eg. EIO in the commit thread), then we still need to | |
78 | * take the FS itself readonly cleanly. */ | |
79 | journal = EXT3_SB(sb)->s_journal; | |
80 | if (is_journal_aborted(journal)) { | |
e05b6b52 | 81 | ext3_abort(sb, __func__, |
1da177e4 LT |
82 | "Detected aborted journal"); |
83 | return ERR_PTR(-EROFS); | |
84 | } | |
85 | ||
86 | return journal_start(journal, nblocks); | |
87 | } | |
88 | ||
1da177e4 LT |
89 | int __ext3_journal_stop(const char *where, handle_t *handle) |
90 | { | |
91 | struct super_block *sb; | |
92 | int err; | |
93 | int rc; | |
94 | ||
95 | sb = handle->h_transaction->t_journal->j_private; | |
96 | err = handle->h_err; | |
97 | rc = journal_stop(handle); | |
98 | ||
99 | if (!err) | |
100 | err = rc; | |
101 | if (err) | |
102 | __ext3_std_error(sb, where, err); | |
103 | return err; | |
104 | } | |
105 | ||
106 | void ext3_journal_abort_handle(const char *caller, const char *err_fn, | |
107 | struct buffer_head *bh, handle_t *handle, int err) | |
108 | { | |
109 | char nbuf[16]; | |
110 | const char *errstr = ext3_decode_error(NULL, err, nbuf); | |
111 | ||
112 | if (bh) | |
113 | BUFFER_TRACE(bh, "abort"); | |
114 | ||
115 | if (!handle->h_err) | |
116 | handle->h_err = err; | |
117 | ||
118 | if (is_handle_aborted(handle)) | |
119 | return; | |
120 | ||
4cf46b67 AF |
121 | printk(KERN_ERR "EXT3-fs: %s: aborting transaction: %s in %s\n", |
122 | caller, errstr, err_fn); | |
1da177e4 LT |
123 | |
124 | journal_abort_handle(handle); | |
125 | } | |
126 | ||
4cf46b67 AF |
127 | void ext3_msg(struct super_block *sb, const char *prefix, |
128 | const char *fmt, ...) | |
129 | { | |
99fbb1e2 | 130 | struct va_format vaf; |
4cf46b67 AF |
131 | va_list args; |
132 | ||
133 | va_start(args, fmt); | |
99fbb1e2 JP |
134 | |
135 | vaf.fmt = fmt; | |
136 | vaf.va = &args; | |
137 | ||
138 | printk("%sEXT3-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
139 | ||
4cf46b67 AF |
140 | va_end(args); |
141 | } | |
142 | ||
1da177e4 LT |
143 | /* Deal with the reporting of failure conditions on a filesystem such as |
144 | * inconsistencies detected or read IO failures. | |
145 | * | |
146 | * On ext2, we can store the error state of the filesystem in the | |
147 | * superblock. That is not possible on ext3, because we may have other | |
148 | * write ordering constraints on the superblock which prevent us from | |
149 | * writing it out straight away; and given that the journal is about to | |
150 | * be aborted, we can't rely on the current, or future, transactions to | |
151 | * write out the superblock safely. | |
152 | * | |
153 | * We'll just use the journal_abort() error code to record an error in | |
d6b198bc | 154 | * the journal instead. On recovery, the journal will complain about |
1da177e4 LT |
155 | * that error until we've noted it down and cleared it. |
156 | */ | |
157 | ||
158 | static void ext3_handle_error(struct super_block *sb) | |
159 | { | |
160 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
161 | ||
162 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
163 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
164 | ||
165 | if (sb->s_flags & MS_RDONLY) | |
166 | return; | |
167 | ||
7543fc7b | 168 | if (!test_opt (sb, ERRORS_CONT)) { |
1da177e4 LT |
169 | journal_t *journal = EXT3_SB(sb)->s_journal; |
170 | ||
e3c96435 | 171 | set_opt(EXT3_SB(sb)->s_mount_opt, ABORT); |
1da177e4 LT |
172 | if (journal) |
173 | journal_abort(journal, -EIO); | |
174 | } | |
7543fc7b | 175 | if (test_opt (sb, ERRORS_RO)) { |
4cf46b67 AF |
176 | ext3_msg(sb, KERN_CRIT, |
177 | "error: remounting filesystem read-only"); | |
3df32196 DM |
178 | /* |
179 | * Make sure updated value of ->s_mount_state will be visible | |
180 | * before ->s_flags update. | |
181 | */ | |
182 | smp_wmb(); | |
7543fc7b VA |
183 | sb->s_flags |= MS_RDONLY; |
184 | } | |
185 | ext3_commit_super(sb, es, 1); | |
1da177e4 | 186 | if (test_opt(sb, ERRORS_PANIC)) |
4cf46b67 | 187 | panic("EXT3-fs (%s): panic forced after error\n", |
1da177e4 | 188 | sb->s_id); |
1da177e4 LT |
189 | } |
190 | ||
99fbb1e2 JP |
191 | void ext3_error(struct super_block *sb, const char *function, |
192 | const char *fmt, ...) | |
1da177e4 | 193 | { |
99fbb1e2 | 194 | struct va_format vaf; |
1da177e4 LT |
195 | va_list args; |
196 | ||
197 | va_start(args, fmt); | |
99fbb1e2 JP |
198 | |
199 | vaf.fmt = fmt; | |
200 | vaf.va = &args; | |
201 | ||
202 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: %pV\n", | |
203 | sb->s_id, function, &vaf); | |
204 | ||
1da177e4 LT |
205 | va_end(args); |
206 | ||
207 | ext3_handle_error(sb); | |
208 | } | |
209 | ||
210 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
211 | char nbuf[16]) | |
212 | { | |
213 | char *errstr = NULL; | |
214 | ||
215 | switch (errno) { | |
216 | case -EIO: | |
217 | errstr = "IO failure"; | |
218 | break; | |
219 | case -ENOMEM: | |
220 | errstr = "Out of memory"; | |
221 | break; | |
222 | case -EROFS: | |
223 | if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT) | |
224 | errstr = "Journal has aborted"; | |
225 | else | |
226 | errstr = "Readonly filesystem"; | |
227 | break; | |
228 | default: | |
229 | /* If the caller passed in an extra buffer for unknown | |
230 | * errors, textualise them now. Else we just return | |
231 | * NULL. */ | |
232 | if (nbuf) { | |
233 | /* Check for truncated error codes... */ | |
234 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
235 | errstr = nbuf; | |
236 | } | |
237 | break; | |
238 | } | |
239 | ||
240 | return errstr; | |
241 | } | |
242 | ||
243 | /* __ext3_std_error decodes expected errors from journaling functions | |
244 | * automatically and invokes the appropriate error response. */ | |
245 | ||
246 | void __ext3_std_error (struct super_block * sb, const char * function, | |
247 | int errno) | |
248 | { | |
249 | char nbuf[16]; | |
30121624 | 250 | const char *errstr; |
1da177e4 | 251 | |
30121624 ST |
252 | /* Special case: if the error is EROFS, and we're not already |
253 | * inside a transaction, then there's really no point in logging | |
254 | * an error. */ | |
255 | if (errno == -EROFS && journal_current_handle() == NULL && | |
256 | (sb->s_flags & MS_RDONLY)) | |
257 | return; | |
258 | ||
259 | errstr = ext3_decode_error(sb, errno, nbuf); | |
4cf46b67 | 260 | ext3_msg(sb, KERN_CRIT, "error in %s: %s", function, errstr); |
1da177e4 LT |
261 | |
262 | ext3_handle_error(sb); | |
263 | } | |
264 | ||
265 | /* | |
266 | * ext3_abort is a much stronger failure handler than ext3_error. The | |
267 | * abort function may be used to deal with unrecoverable failures such | |
268 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
269 | * | |
270 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
271 | * unless the error response on the fs has been set to panic in which | |
272 | * case we take the easy way out and panic immediately. | |
273 | */ | |
274 | ||
99fbb1e2 JP |
275 | void ext3_abort(struct super_block *sb, const char *function, |
276 | const char *fmt, ...) | |
1da177e4 | 277 | { |
99fbb1e2 | 278 | struct va_format vaf; |
1da177e4 LT |
279 | va_list args; |
280 | ||
1da177e4 | 281 | va_start(args, fmt); |
99fbb1e2 JP |
282 | |
283 | vaf.fmt = fmt; | |
284 | vaf.va = &args; | |
285 | ||
286 | printk(KERN_CRIT "EXT3-fs (%s): error: %s: %pV\n", | |
287 | sb->s_id, function, &vaf); | |
288 | ||
1da177e4 LT |
289 | va_end(args); |
290 | ||
291 | if (test_opt(sb, ERRORS_PANIC)) | |
4cf46b67 | 292 | panic("EXT3-fs: panic from previous error\n"); |
1da177e4 LT |
293 | |
294 | if (sb->s_flags & MS_RDONLY) | |
295 | return; | |
296 | ||
4cf46b67 AF |
297 | ext3_msg(sb, KERN_CRIT, |
298 | "error: remounting filesystem read-only"); | |
1da177e4 | 299 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; |
e3c96435 | 300 | set_opt(EXT3_SB(sb)->s_mount_opt, ABORT); |
3df32196 DM |
301 | /* |
302 | * Make sure updated value of ->s_mount_state will be visible | |
303 | * before ->s_flags update. | |
304 | */ | |
305 | smp_wmb(); | |
306 | sb->s_flags |= MS_RDONLY; | |
307 | ||
44d6f787 HK |
308 | if (EXT3_SB(sb)->s_journal) |
309 | journal_abort(EXT3_SB(sb)->s_journal, -EIO); | |
1da177e4 LT |
310 | } |
311 | ||
99fbb1e2 JP |
312 | void ext3_warning(struct super_block *sb, const char *function, |
313 | const char *fmt, ...) | |
1da177e4 | 314 | { |
99fbb1e2 | 315 | struct va_format vaf; |
1da177e4 LT |
316 | va_list args; |
317 | ||
318 | va_start(args, fmt); | |
99fbb1e2 JP |
319 | |
320 | vaf.fmt = fmt; | |
321 | vaf.va = &args; | |
322 | ||
323 | printk(KERN_WARNING "EXT3-fs (%s): warning: %s: %pV\n", | |
324 | sb->s_id, function, &vaf); | |
325 | ||
1da177e4 LT |
326 | va_end(args); |
327 | } | |
328 | ||
329 | void ext3_update_dynamic_rev(struct super_block *sb) | |
330 | { | |
331 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
332 | ||
333 | if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV) | |
334 | return; | |
335 | ||
4cf46b67 AF |
336 | ext3_msg(sb, KERN_WARNING, |
337 | "warning: updating to rev %d because of " | |
338 | "new feature flag, running e2fsck is recommended", | |
339 | EXT3_DYNAMIC_REV); | |
1da177e4 LT |
340 | |
341 | es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO); | |
342 | es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE); | |
343 | es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV); | |
344 | /* leave es->s_feature_*compat flags alone */ | |
345 | /* es->s_uuid will be set by e2fsck if empty */ | |
346 | ||
347 | /* | |
348 | * The rest of the superblock fields should be zero, and if not it | |
349 | * means they are likely already in use, so leave them alone. We | |
350 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
351 | */ | |
352 | } | |
353 | ||
354 | /* | |
355 | * Open the external journal device | |
356 | */ | |
4cf46b67 | 357 | static struct block_device *ext3_blkdev_get(dev_t dev, struct super_block *sb) |
1da177e4 LT |
358 | { |
359 | struct block_device *bdev; | |
360 | char b[BDEVNAME_SIZE]; | |
361 | ||
d4d77629 | 362 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
1da177e4 LT |
363 | if (IS_ERR(bdev)) |
364 | goto fail; | |
365 | return bdev; | |
366 | ||
367 | fail: | |
8d0c2d10 | 368 | ext3_msg(sb, KERN_ERR, "error: failed to open journal device %s: %ld", |
4cf46b67 AF |
369 | __bdevname(dev, b), PTR_ERR(bdev)); |
370 | ||
1da177e4 LT |
371 | return NULL; |
372 | } | |
373 | ||
374 | /* | |
375 | * Release the journal device | |
376 | */ | |
4385bab1 | 377 | static void ext3_blkdev_put(struct block_device *bdev) |
1da177e4 | 378 | { |
4385bab1 | 379 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
1da177e4 LT |
380 | } |
381 | ||
4385bab1 | 382 | static void ext3_blkdev_remove(struct ext3_sb_info *sbi) |
1da177e4 LT |
383 | { |
384 | struct block_device *bdev; | |
1da177e4 LT |
385 | bdev = sbi->journal_bdev; |
386 | if (bdev) { | |
4385bab1 | 387 | ext3_blkdev_put(bdev); |
1da177e4 LT |
388 | sbi->journal_bdev = NULL; |
389 | } | |
1da177e4 LT |
390 | } |
391 | ||
392 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
393 | { | |
394 | return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode; | |
395 | } | |
396 | ||
397 | static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi) | |
398 | { | |
399 | struct list_head *l; | |
400 | ||
4cf46b67 | 401 | ext3_msg(sb, KERN_ERR, "error: sb orphan head is %d", |
1da177e4 LT |
402 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
403 | ||
4cf46b67 | 404 | ext3_msg(sb, KERN_ERR, "sb_info orphan list:"); |
1da177e4 LT |
405 | list_for_each(l, &sbi->s_orphan) { |
406 | struct inode *inode = orphan_list_entry(l); | |
4cf46b67 | 407 | ext3_msg(sb, KERN_ERR, " " |
eee194e7 | 408 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
1da177e4 | 409 | inode->i_sb->s_id, inode->i_ino, inode, |
ae6ddcc5 | 410 | inode->i_mode, inode->i_nlink, |
1da177e4 LT |
411 | NEXT_ORPHAN(inode)); |
412 | } | |
413 | } | |
414 | ||
415 | static void ext3_put_super (struct super_block * sb) | |
416 | { | |
417 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
418 | struct ext3_super_block *es = sbi->s_es; | |
44d6f787 | 419 | int i, err; |
1da177e4 | 420 | |
e0ccfd95 | 421 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
1da177e4 | 422 | ext3_xattr_put_super(sb); |
44d6f787 HK |
423 | err = journal_destroy(sbi->s_journal); |
424 | sbi->s_journal = NULL; | |
425 | if (err < 0) | |
2d7c820e | 426 | ext3_abort(sb, __func__, "Couldn't clean up the journal"); |
44d6f787 | 427 | |
1da177e4 LT |
428 | if (!(sb->s_flags & MS_RDONLY)) { |
429 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
430 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
431 | BUFFER_TRACE(sbi->s_sbh, "marking dirty"); | |
432 | mark_buffer_dirty(sbi->s_sbh); | |
433 | ext3_commit_super(sb, es, 1); | |
434 | } | |
435 | ||
436 | for (i = 0; i < sbi->s_gdb_count; i++) | |
437 | brelse(sbi->s_group_desc[i]); | |
438 | kfree(sbi->s_group_desc); | |
439 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
440 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
441 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
442 | brelse(sbi->s_sbh); | |
443 | #ifdef CONFIG_QUOTA | |
a93114e4 | 444 | for (i = 0; i < EXT3_MAXQUOTAS; i++) |
1da177e4 LT |
445 | kfree(sbi->s_qf_names[i]); |
446 | #endif | |
447 | ||
448 | /* Debugging code just in case the in-memory inode orphan list | |
449 | * isn't empty. The on-disk one can be non-empty if we've | |
450 | * detected an error and taken the fs readonly, but the | |
451 | * in-memory list had better be clean by this point. */ | |
452 | if (!list_empty(&sbi->s_orphan)) | |
453 | dump_orphan_list(sb, sbi); | |
454 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
455 | ||
f98393a6 | 456 | invalidate_bdev(sb->s_bdev); |
1da177e4 LT |
457 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
458 | /* | |
459 | * Invalidate the journal device's buffers. We don't want them | |
460 | * floating about in memory - the physical journal device may | |
461 | * hotswapped, and it breaks the `ro-after' testing code. | |
462 | */ | |
463 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 464 | invalidate_bdev(sbi->journal_bdev); |
1da177e4 LT |
465 | ext3_blkdev_remove(sbi); |
466 | } | |
467 | sb->s_fs_info = NULL; | |
5df096d6 | 468 | kfree(sbi->s_blockgroup_lock); |
6744e90b FF |
469 | mutex_destroy(&sbi->s_orphan_lock); |
470 | mutex_destroy(&sbi->s_resize_lock); | |
1da177e4 | 471 | kfree(sbi); |
1da177e4 LT |
472 | } |
473 | ||
e18b890b | 474 | static struct kmem_cache *ext3_inode_cachep; |
1da177e4 LT |
475 | |
476 | /* | |
477 | * Called inside transaction, so use GFP_NOFS | |
478 | */ | |
479 | static struct inode *ext3_alloc_inode(struct super_block *sb) | |
480 | { | |
481 | struct ext3_inode_info *ei; | |
482 | ||
e6b4f8da | 483 | ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS); |
1da177e4 LT |
484 | if (!ei) |
485 | return NULL; | |
1da177e4 LT |
486 | ei->i_block_alloc_info = NULL; |
487 | ei->vfs_inode.i_version = 1; | |
fe8bc91c JK |
488 | atomic_set(&ei->i_datasync_tid, 0); |
489 | atomic_set(&ei->i_sync_tid, 0); | |
4018cfbc JK |
490 | #ifdef CONFIG_QUOTA |
491 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); | |
492 | #endif | |
493 | ||
1da177e4 LT |
494 | return &ei->vfs_inode; |
495 | } | |
496 | ||
785c4bcc LC |
497 | static int ext3_drop_inode(struct inode *inode) |
498 | { | |
499 | int drop = generic_drop_inode(inode); | |
500 | ||
501 | trace_ext3_drop_inode(inode, drop); | |
502 | return drop; | |
503 | } | |
504 | ||
fa0d7e3d NP |
505 | static void ext3_i_callback(struct rcu_head *head) |
506 | { | |
507 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
508 | kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); |
509 | } | |
510 | ||
1da177e4 LT |
511 | static void ext3_destroy_inode(struct inode *inode) |
512 | { | |
9f7dd93d VA |
513 | if (!list_empty(&(EXT3_I(inode)->i_orphan))) { |
514 | printk("EXT3 Inode %p: orphan list check failed!\n", | |
515 | EXT3_I(inode)); | |
516 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
517 | EXT3_I(inode), sizeof(struct ext3_inode_info), | |
518 | false); | |
519 | dump_stack(); | |
520 | } | |
fa0d7e3d | 521 | call_rcu(&inode->i_rcu, ext3_i_callback); |
1da177e4 LT |
522 | } |
523 | ||
51cc5068 | 524 | static void init_once(void *foo) |
1da177e4 LT |
525 | { |
526 | struct ext3_inode_info *ei = (struct ext3_inode_info *) foo; | |
527 | ||
a35afb83 | 528 | INIT_LIST_HEAD(&ei->i_orphan); |
1da177e4 | 529 | #ifdef CONFIG_EXT3_FS_XATTR |
a35afb83 | 530 | init_rwsem(&ei->xattr_sem); |
1da177e4 | 531 | #endif |
a35afb83 CL |
532 | mutex_init(&ei->truncate_mutex); |
533 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 534 | } |
ae6ddcc5 | 535 | |
1da8b822 | 536 | static int __init init_inodecache(void) |
1da177e4 LT |
537 | { |
538 | ext3_inode_cachep = kmem_cache_create("ext3_inode_cache", | |
539 | sizeof(struct ext3_inode_info), | |
fffb60f9 PJ |
540 | 0, (SLAB_RECLAIM_ACCOUNT| |
541 | SLAB_MEM_SPREAD), | |
20c2df83 | 542 | init_once); |
1da177e4 LT |
543 | if (ext3_inode_cachep == NULL) |
544 | return -ENOMEM; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | static void destroy_inodecache(void) | |
549 | { | |
8c0a8537 KS |
550 | /* |
551 | * Make sure all delayed rcu free inodes are flushed before we | |
552 | * destroy cache. | |
553 | */ | |
554 | rcu_barrier(); | |
1a1d92c1 | 555 | kmem_cache_destroy(ext3_inode_cachep); |
1da177e4 LT |
556 | } |
557 | ||
6cd37cda | 558 | static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) |
8fc2751b | 559 | { |
6cd37cda | 560 | #if defined(CONFIG_QUOTA) |
275abf5b | 561 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
8fc2751b | 562 | |
1aeec434 JK |
563 | if (sbi->s_jquota_fmt) { |
564 | char *fmtname = ""; | |
565 | ||
566 | switch (sbi->s_jquota_fmt) { | |
567 | case QFMT_VFS_OLD: | |
568 | fmtname = "vfsold"; | |
569 | break; | |
570 | case QFMT_VFS_V0: | |
571 | fmtname = "vfsv0"; | |
572 | break; | |
573 | case QFMT_VFS_V1: | |
574 | fmtname = "vfsv1"; | |
575 | break; | |
576 | } | |
577 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
578 | } | |
8fc2751b MB |
579 | |
580 | if (sbi->s_qf_names[USRQUOTA]) | |
581 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
582 | ||
583 | if (sbi->s_qf_names[GRPQUOTA]) | |
584 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
585 | ||
e3c96435 | 586 | if (test_opt(sb, USRQUOTA)) |
8fc2751b MB |
587 | seq_puts(seq, ",usrquota"); |
588 | ||
e3c96435 | 589 | if (test_opt(sb, GRPQUOTA)) |
8fc2751b MB |
590 | seq_puts(seq, ",grpquota"); |
591 | #endif | |
6cd37cda PO |
592 | } |
593 | ||
3c4cec65 JK |
594 | static char *data_mode_string(unsigned long mode) |
595 | { | |
596 | switch (mode) { | |
597 | case EXT3_MOUNT_JOURNAL_DATA: | |
598 | return "journal"; | |
599 | case EXT3_MOUNT_ORDERED_DATA: | |
600 | return "ordered"; | |
601 | case EXT3_MOUNT_WRITEBACK_DATA: | |
602 | return "writeback"; | |
603 | } | |
604 | return "unknown"; | |
605 | } | |
606 | ||
571beed8 MS |
607 | /* |
608 | * Show an option if | |
609 | * - it's set to a non-default value OR | |
610 | * - if the per-sb default is different from the global default | |
611 | */ | |
34c80b1d | 612 | static int ext3_show_options(struct seq_file *seq, struct dentry *root) |
6cd37cda | 613 | { |
34c80b1d | 614 | struct super_block *sb = root->d_sb; |
571beed8 MS |
615 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
616 | struct ext3_super_block *es = sbi->s_es; | |
617 | unsigned long def_mount_opts; | |
618 | ||
619 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
620 | ||
621 | if (sbi->s_sb_block != 1) | |
622 | seq_printf(seq, ",sb=%lu", sbi->s_sb_block); | |
623 | if (test_opt(sb, MINIX_DF)) | |
624 | seq_puts(seq, ",minixdf"); | |
625 | if (test_opt(sb, GRPID)) | |
626 | seq_puts(seq, ",grpid"); | |
627 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS)) | |
628 | seq_puts(seq, ",nogrpid"); | |
1523299d | 629 | if (!uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT3_DEF_RESUID)) || |
571beed8 | 630 | le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) { |
1523299d EB |
631 | seq_printf(seq, ",resuid=%u", |
632 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
571beed8 | 633 | } |
1523299d | 634 | if (!gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT3_DEF_RESGID)) || |
571beed8 | 635 | le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) { |
1523299d EB |
636 | seq_printf(seq, ",resgid=%u", |
637 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
571beed8 | 638 | } |
1eca93f9 | 639 | if (test_opt(sb, ERRORS_RO)) { |
571beed8 MS |
640 | int def_errors = le16_to_cpu(es->s_errors); |
641 | ||
642 | if (def_errors == EXT3_ERRORS_PANIC || | |
1eca93f9 AK |
643 | def_errors == EXT3_ERRORS_CONTINUE) { |
644 | seq_puts(seq, ",errors=remount-ro"); | |
571beed8 MS |
645 | } |
646 | } | |
1eca93f9 AK |
647 | if (test_opt(sb, ERRORS_CONT)) |
648 | seq_puts(seq, ",errors=continue"); | |
571beed8 MS |
649 | if (test_opt(sb, ERRORS_PANIC)) |
650 | seq_puts(seq, ",errors=panic"); | |
651 | if (test_opt(sb, NO_UID32)) | |
652 | seq_puts(seq, ",nouid32"); | |
653 | if (test_opt(sb, DEBUG)) | |
654 | seq_puts(seq, ",debug"); | |
571beed8 MS |
655 | #ifdef CONFIG_EXT3_FS_XATTR |
656 | if (test_opt(sb, XATTR_USER)) | |
657 | seq_puts(seq, ",user_xattr"); | |
658 | if (!test_opt(sb, XATTR_USER) && | |
659 | (def_mount_opts & EXT3_DEFM_XATTR_USER)) { | |
660 | seq_puts(seq, ",nouser_xattr"); | |
661 | } | |
662 | #endif | |
663 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
664 | if (test_opt(sb, POSIX_ACL)) | |
665 | seq_puts(seq, ",acl"); | |
666 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL)) | |
667 | seq_puts(seq, ",noacl"); | |
668 | #endif | |
669 | if (!test_opt(sb, RESERVATION)) | |
670 | seq_puts(seq, ",noreservation"); | |
671 | if (sbi->s_commit_interval) { | |
672 | seq_printf(seq, ",commit=%u", | |
673 | (unsigned) (sbi->s_commit_interval / HZ)); | |
674 | } | |
0636c73e ES |
675 | |
676 | /* | |
677 | * Always display barrier state so it's clear what the status is. | |
678 | */ | |
679 | seq_puts(seq, ",barrier="); | |
680 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
e3c96435 | 681 | seq_printf(seq, ",data=%s", data_mode_string(test_opt(sb, DATA_FLAGS))); |
0e4fb5e2 HK |
682 | if (test_opt(sb, DATA_ERR_ABORT)) |
683 | seq_puts(seq, ",data_err=abort"); | |
684 | ||
dee1d3b6 ES |
685 | if (test_opt(sb, NOLOAD)) |
686 | seq_puts(seq, ",norecovery"); | |
687 | ||
6cd37cda | 688 | ext3_show_quota_options(seq, sb); |
8fc2751b MB |
689 | |
690 | return 0; | |
691 | } | |
1da177e4 | 692 | |
fdb36673 | 693 | |
74af0baa CH |
694 | static struct inode *ext3_nfs_get_inode(struct super_block *sb, |
695 | u64 ino, u32 generation) | |
fdb36673 | 696 | { |
fdb36673 | 697 | struct inode *inode; |
fdb36673 N |
698 | |
699 | if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO) | |
700 | return ERR_PTR(-ESTALE); | |
701 | if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) | |
702 | return ERR_PTR(-ESTALE); | |
703 | ||
704 | /* iget isn't really right if the inode is currently unallocated!! | |
705 | * | |
706 | * ext3_read_inode will return a bad_inode if the inode had been | |
707 | * deleted, so we should be safe. | |
708 | * | |
709 | * Currently we don't know the generation for parent directory, so | |
710 | * a generation of 0 means "accept any" | |
711 | */ | |
473043dc DH |
712 | inode = ext3_iget(sb, ino); |
713 | if (IS_ERR(inode)) | |
714 | return ERR_CAST(inode); | |
715 | if (generation && inode->i_generation != generation) { | |
fdb36673 N |
716 | iput(inode); |
717 | return ERR_PTR(-ESTALE); | |
718 | } | |
74af0baa CH |
719 | |
720 | return inode; | |
721 | } | |
722 | ||
723 | static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
724 | int fh_len, int fh_type) | |
725 | { | |
726 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
727 | ext3_nfs_get_inode); | |
728 | } | |
729 | ||
730 | static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid, | |
731 | int fh_len, int fh_type) | |
732 | { | |
733 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
734 | ext3_nfs_get_inode); | |
fdb36673 N |
735 | } |
736 | ||
6b082b53 TO |
737 | /* |
738 | * Try to release metadata pages (indirect blocks, directories) which are | |
739 | * mapped via the block device. Since these pages could have journal heads | |
740 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
741 | * jbd layer's try_to_free_buffers() function to release them. | |
742 | */ | |
743 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, | |
744 | gfp_t wait) | |
745 | { | |
746 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
747 | ||
748 | WARN_ON(PageChecked(page)); | |
749 | if (!page_has_buffers(page)) | |
750 | return 0; | |
751 | if (journal) | |
752 | return journal_try_to_free_buffers(journal, page, | |
753 | wait & ~__GFP_WAIT); | |
754 | return try_to_free_buffers(page); | |
755 | } | |
756 | ||
8fc2751b | 757 | #ifdef CONFIG_QUOTA |
1da177e4 LT |
758 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
759 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) | |
760 | ||
1da177e4 LT |
761 | static int ext3_write_dquot(struct dquot *dquot); |
762 | static int ext3_acquire_dquot(struct dquot *dquot); | |
763 | static int ext3_release_dquot(struct dquot *dquot); | |
764 | static int ext3_mark_dquot_dirty(struct dquot *dquot); | |
765 | static int ext3_write_info(struct super_block *sb, int type); | |
2fd83a4f | 766 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 767 | struct path *path); |
1da177e4 LT |
768 | static int ext3_quota_on_mount(struct super_block *sb, int type); |
769 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
770 | size_t len, loff_t off); | |
771 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
772 | const char *data, size_t len, loff_t off); | |
4018cfbc JK |
773 | static struct dquot **ext3_get_dquots(struct inode *inode) |
774 | { | |
775 | return EXT3_I(inode)->i_dquot; | |
776 | } | |
1da177e4 | 777 | |
61e225dc | 778 | static const struct dquot_operations ext3_quota_operations = { |
1da177e4 LT |
779 | .write_dquot = ext3_write_dquot, |
780 | .acquire_dquot = ext3_acquire_dquot, | |
781 | .release_dquot = ext3_release_dquot, | |
782 | .mark_dirty = ext3_mark_dquot_dirty, | |
157091a2 JK |
783 | .write_info = ext3_write_info, |
784 | .alloc_dquot = dquot_alloc, | |
785 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
786 | }; |
787 | ||
0d54b217 | 788 | static const struct quotactl_ops ext3_qctl_operations = { |
1da177e4 | 789 | .quota_on = ext3_quota_on, |
287a8095 CH |
790 | .quota_off = dquot_quota_off, |
791 | .quota_sync = dquot_quota_sync, | |
792 | .get_info = dquot_get_dqinfo, | |
793 | .set_info = dquot_set_dqinfo, | |
794 | .get_dqblk = dquot_get_dqblk, | |
795 | .set_dqblk = dquot_set_dqblk | |
1da177e4 LT |
796 | }; |
797 | #endif | |
798 | ||
ee9b6d61 | 799 | static const struct super_operations ext3_sops = { |
1da177e4 LT |
800 | .alloc_inode = ext3_alloc_inode, |
801 | .destroy_inode = ext3_destroy_inode, | |
1da177e4 LT |
802 | .write_inode = ext3_write_inode, |
803 | .dirty_inode = ext3_dirty_inode, | |
785c4bcc | 804 | .drop_inode = ext3_drop_inode, |
ac14a95b | 805 | .evict_inode = ext3_evict_inode, |
1da177e4 | 806 | .put_super = ext3_put_super, |
1da177e4 | 807 | .sync_fs = ext3_sync_fs, |
c4be0c1d TS |
808 | .freeze_fs = ext3_freeze, |
809 | .unfreeze_fs = ext3_unfreeze, | |
1da177e4 LT |
810 | .statfs = ext3_statfs, |
811 | .remount_fs = ext3_remount, | |
8fc2751b | 812 | .show_options = ext3_show_options, |
1da177e4 LT |
813 | #ifdef CONFIG_QUOTA |
814 | .quota_read = ext3_quota_read, | |
815 | .quota_write = ext3_quota_write, | |
4018cfbc | 816 | .get_dquots = ext3_get_dquots, |
1da177e4 | 817 | #endif |
6b082b53 | 818 | .bdev_try_to_free_page = bdev_try_to_free_page, |
1da177e4 LT |
819 | }; |
820 | ||
39655164 | 821 | static const struct export_operations ext3_export_ops = { |
74af0baa CH |
822 | .fh_to_dentry = ext3_fh_to_dentry, |
823 | .fh_to_parent = ext3_fh_to_parent, | |
1da177e4 LT |
824 | .get_parent = ext3_get_parent, |
825 | }; | |
826 | ||
827 | enum { | |
828 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
829 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
2860b733 | 830 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, |
1da177e4 | 831 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
ade1a29e | 832 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, |
71b96257 | 833 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, |
cf7eff46 | 834 | Opt_journal_path, |
1da177e4 | 835 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
0e4fb5e2 | 836 | Opt_data_err_abort, Opt_data_err_ignore, |
1da177e4 | 837 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1aeec434 | 838 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
0636c73e ES |
839 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, |
840 | Opt_resize, Opt_usrquota, Opt_grpquota | |
1da177e4 LT |
841 | }; |
842 | ||
a447c093 | 843 | static const match_table_t tokens = { |
1da177e4 LT |
844 | {Opt_bsd_df, "bsddf"}, |
845 | {Opt_minix_df, "minixdf"}, | |
846 | {Opt_grpid, "grpid"}, | |
847 | {Opt_grpid, "bsdgroups"}, | |
848 | {Opt_nogrpid, "nogrpid"}, | |
849 | {Opt_nogrpid, "sysvgroups"}, | |
850 | {Opt_resgid, "resgid=%u"}, | |
851 | {Opt_resuid, "resuid=%u"}, | |
852 | {Opt_sb, "sb=%u"}, | |
853 | {Opt_err_cont, "errors=continue"}, | |
854 | {Opt_err_panic, "errors=panic"}, | |
855 | {Opt_err_ro, "errors=remount-ro"}, | |
856 | {Opt_nouid32, "nouid32"}, | |
857 | {Opt_nocheck, "nocheck"}, | |
858 | {Opt_nocheck, "check=none"}, | |
1da177e4 LT |
859 | {Opt_debug, "debug"}, |
860 | {Opt_oldalloc, "oldalloc"}, | |
861 | {Opt_orlov, "orlov"}, | |
862 | {Opt_user_xattr, "user_xattr"}, | |
863 | {Opt_nouser_xattr, "nouser_xattr"}, | |
864 | {Opt_acl, "acl"}, | |
865 | {Opt_noacl, "noacl"}, | |
866 | {Opt_reservation, "reservation"}, | |
867 | {Opt_noreservation, "noreservation"}, | |
868 | {Opt_noload, "noload"}, | |
dee1d3b6 | 869 | {Opt_noload, "norecovery"}, |
1da177e4 | 870 | {Opt_nobh, "nobh"}, |
ade1a29e | 871 | {Opt_bh, "bh"}, |
1da177e4 LT |
872 | {Opt_commit, "commit=%u"}, |
873 | {Opt_journal_update, "journal=update"}, | |
874 | {Opt_journal_inum, "journal=%u"}, | |
71b96257 | 875 | {Opt_journal_dev, "journal_dev=%u"}, |
cf7eff46 | 876 | {Opt_journal_path, "journal_path=%s"}, |
1da177e4 LT |
877 | {Opt_abort, "abort"}, |
878 | {Opt_data_journal, "data=journal"}, | |
879 | {Opt_data_ordered, "data=ordered"}, | |
880 | {Opt_data_writeback, "data=writeback"}, | |
0e4fb5e2 HK |
881 | {Opt_data_err_abort, "data_err=abort"}, |
882 | {Opt_data_err_ignore, "data_err=ignore"}, | |
1da177e4 LT |
883 | {Opt_offusrjquota, "usrjquota="}, |
884 | {Opt_usrjquota, "usrjquota=%s"}, | |
885 | {Opt_offgrpjquota, "grpjquota="}, | |
886 | {Opt_grpjquota, "grpjquota=%s"}, | |
887 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
888 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1aeec434 | 889 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
8fc2751b | 890 | {Opt_grpquota, "grpquota"}, |
1f54587b JK |
891 | {Opt_noquota, "noquota"}, |
892 | {Opt_quota, "quota"}, | |
8fc2751b | 893 | {Opt_usrquota, "usrquota"}, |
1da177e4 | 894 | {Opt_barrier, "barrier=%u"}, |
0636c73e ES |
895 | {Opt_barrier, "barrier"}, |
896 | {Opt_nobarrier, "nobarrier"}, | |
1da177e4 | 897 | {Opt_resize, "resize"}, |
92587216 | 898 | {Opt_err, NULL}, |
1da177e4 LT |
899 | }; |
900 | ||
4cf46b67 | 901 | static ext3_fsblk_t get_sb_block(void **data, struct super_block *sb) |
1da177e4 | 902 | { |
e9ad5620 DK |
903 | ext3_fsblk_t sb_block; |
904 | char *options = (char *) *data; | |
1da177e4 LT |
905 | |
906 | if (!options || strncmp(options, "sb=", 3) != 0) | |
907 | return 1; /* Default location */ | |
908 | options += 3; | |
43d23f90 | 909 | /*todo: use simple_strtoll with >32bit ext3 */ |
1da177e4 LT |
910 | sb_block = simple_strtoul(options, &options, 0); |
911 | if (*options && *options != ',') { | |
8d0c2d10 | 912 | ext3_msg(sb, KERN_ERR, "error: invalid sb specification: %s", |
1da177e4 LT |
913 | (char *) *data); |
914 | return 1; | |
915 | } | |
916 | if (*options == ',') | |
917 | options++; | |
918 | *data = (void *) options; | |
919 | return sb_block; | |
920 | } | |
921 | ||
e1f5c67a DM |
922 | #ifdef CONFIG_QUOTA |
923 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
924 | { | |
925 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
926 | char *qname; | |
927 | ||
928 | if (sb_any_quota_loaded(sb) && | |
929 | !sbi->s_qf_names[qtype]) { | |
930 | ext3_msg(sb, KERN_ERR, | |
931 | "Cannot change journaled " | |
932 | "quota options when quota turned on"); | |
933 | return 0; | |
934 | } | |
935 | qname = match_strdup(args); | |
936 | if (!qname) { | |
937 | ext3_msg(sb, KERN_ERR, | |
938 | "Not enough memory for storing quotafile name"); | |
939 | return 0; | |
940 | } | |
f56426ae JK |
941 | if (sbi->s_qf_names[qtype]) { |
942 | int same = !strcmp(sbi->s_qf_names[qtype], qname); | |
943 | ||
e1f5c67a | 944 | kfree(qname); |
f56426ae JK |
945 | if (!same) { |
946 | ext3_msg(sb, KERN_ERR, | |
947 | "%s quota file already specified", | |
948 | QTYPE2NAME(qtype)); | |
949 | } | |
950 | return same; | |
e1f5c67a | 951 | } |
f56426ae | 952 | if (strchr(qname, '/')) { |
e1f5c67a DM |
953 | ext3_msg(sb, KERN_ERR, |
954 | "quotafile must be on filesystem root"); | |
f56426ae | 955 | kfree(qname); |
e1f5c67a DM |
956 | return 0; |
957 | } | |
f56426ae | 958 | sbi->s_qf_names[qtype] = qname; |
e1f5c67a DM |
959 | set_opt(sbi->s_mount_opt, QUOTA); |
960 | return 1; | |
961 | } | |
962 | ||
963 | static int clear_qf_name(struct super_block *sb, int qtype) { | |
964 | ||
965 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
966 | ||
967 | if (sb_any_quota_loaded(sb) && | |
968 | sbi->s_qf_names[qtype]) { | |
969 | ext3_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
970 | " when quota turned on"); | |
971 | return 0; | |
972 | } | |
f56426ae JK |
973 | if (sbi->s_qf_names[qtype]) { |
974 | kfree(sbi->s_qf_names[qtype]); | |
975 | sbi->s_qf_names[qtype] = NULL; | |
976 | } | |
e1f5c67a DM |
977 | return 1; |
978 | } | |
979 | #endif | |
980 | ||
71b96257 | 981 | static int parse_options (char *options, struct super_block *sb, |
eee194e7 | 982 | unsigned int *inum, unsigned long *journal_devnum, |
43d23f90 | 983 | ext3_fsblk_t *n_blocks_count, int is_remount) |
1da177e4 LT |
984 | { |
985 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
986 | char * p; | |
987 | substring_t args[MAX_OPT_ARGS]; | |
988 | int data_opt = 0; | |
989 | int option; | |
1523299d EB |
990 | kuid_t uid; |
991 | kgid_t gid; | |
cf7eff46 ES |
992 | char *journal_path; |
993 | struct inode *journal_inode; | |
994 | struct path path; | |
995 | int error; | |
996 | ||
1da177e4 | 997 | #ifdef CONFIG_QUOTA |
e1f5c67a | 998 | int qfmt; |
1da177e4 LT |
999 | #endif |
1000 | ||
1001 | if (!options) | |
1002 | return 1; | |
1003 | ||
1004 | while ((p = strsep (&options, ",")) != NULL) { | |
1005 | int token; | |
1006 | if (!*p) | |
1007 | continue; | |
0636c73e ES |
1008 | /* |
1009 | * Initialize args struct so we know whether arg was | |
1010 | * found; some options take optional arguments. | |
1011 | */ | |
76f59b3b | 1012 | args[0].to = args[0].from = NULL; |
1da177e4 LT |
1013 | token = match_token(p, tokens, args); |
1014 | switch (token) { | |
1015 | case Opt_bsd_df: | |
1016 | clear_opt (sbi->s_mount_opt, MINIX_DF); | |
1017 | break; | |
1018 | case Opt_minix_df: | |
1019 | set_opt (sbi->s_mount_opt, MINIX_DF); | |
1020 | break; | |
1021 | case Opt_grpid: | |
1022 | set_opt (sbi->s_mount_opt, GRPID); | |
1023 | break; | |
1024 | case Opt_nogrpid: | |
1025 | clear_opt (sbi->s_mount_opt, GRPID); | |
1026 | break; | |
1027 | case Opt_resuid: | |
1028 | if (match_int(&args[0], &option)) | |
1029 | return 0; | |
1523299d EB |
1030 | uid = make_kuid(current_user_ns(), option); |
1031 | if (!uid_valid(uid)) { | |
1032 | ext3_msg(sb, KERN_ERR, "Invalid uid value %d", option); | |
66415f6b | 1033 | return 0; |
1523299d EB |
1034 | |
1035 | } | |
1036 | sbi->s_resuid = uid; | |
1da177e4 LT |
1037 | break; |
1038 | case Opt_resgid: | |
1039 | if (match_int(&args[0], &option)) | |
1040 | return 0; | |
1523299d EB |
1041 | gid = make_kgid(current_user_ns(), option); |
1042 | if (!gid_valid(gid)) { | |
1043 | ext3_msg(sb, KERN_ERR, "Invalid gid value %d", option); | |
66415f6b | 1044 | return 0; |
1523299d EB |
1045 | } |
1046 | sbi->s_resgid = gid; | |
1da177e4 LT |
1047 | break; |
1048 | case Opt_sb: | |
1049 | /* handled by get_sb_block() instead of here */ | |
1050 | /* *sb_block = match_int(&args[0]); */ | |
1051 | break; | |
1052 | case Opt_err_panic: | |
1053 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1054 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
1055 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1056 | break; | |
1057 | case Opt_err_ro: | |
1058 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1059 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1060 | set_opt (sbi->s_mount_opt, ERRORS_RO); | |
1061 | break; | |
1062 | case Opt_err_cont: | |
1063 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
1064 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1065 | set_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1066 | break; | |
1067 | case Opt_nouid32: | |
1068 | set_opt (sbi->s_mount_opt, NO_UID32); | |
1069 | break; | |
1da177e4 LT |
1070 | case Opt_nocheck: |
1071 | clear_opt (sbi->s_mount_opt, CHECK); | |
1072 | break; | |
1073 | case Opt_debug: | |
1074 | set_opt (sbi->s_mount_opt, DEBUG); | |
1075 | break; | |
1076 | case Opt_oldalloc: | |
fbc85402 LC |
1077 | ext3_msg(sb, KERN_WARNING, |
1078 | "Ignoring deprecated oldalloc option"); | |
1da177e4 LT |
1079 | break; |
1080 | case Opt_orlov: | |
fbc85402 LC |
1081 | ext3_msg(sb, KERN_WARNING, |
1082 | "Ignoring deprecated orlov option"); | |
1da177e4 LT |
1083 | break; |
1084 | #ifdef CONFIG_EXT3_FS_XATTR | |
1085 | case Opt_user_xattr: | |
1086 | set_opt (sbi->s_mount_opt, XATTR_USER); | |
1087 | break; | |
1088 | case Opt_nouser_xattr: | |
1089 | clear_opt (sbi->s_mount_opt, XATTR_USER); | |
1090 | break; | |
1091 | #else | |
1092 | case Opt_user_xattr: | |
1093 | case Opt_nouser_xattr: | |
4cf46b67 AF |
1094 | ext3_msg(sb, KERN_INFO, |
1095 | "(no)user_xattr options not supported"); | |
1da177e4 LT |
1096 | break; |
1097 | #endif | |
1098 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1099 | case Opt_acl: | |
1100 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1101 | break; | |
1102 | case Opt_noacl: | |
1103 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1104 | break; | |
1105 | #else | |
1106 | case Opt_acl: | |
1107 | case Opt_noacl: | |
4cf46b67 AF |
1108 | ext3_msg(sb, KERN_INFO, |
1109 | "(no)acl options not supported"); | |
1da177e4 LT |
1110 | break; |
1111 | #endif | |
1112 | case Opt_reservation: | |
1113 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1114 | break; | |
1115 | case Opt_noreservation: | |
1116 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
1117 | break; | |
1118 | case Opt_journal_update: | |
1119 | /* @@@ FIXME */ | |
1120 | /* Eventually we will want to be able to create | |
1121 | a journal file here. For now, only allow the | |
1122 | user to specify an existing inode to be the | |
1123 | journal file. */ | |
1124 | if (is_remount) { | |
4cf46b67 AF |
1125 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1126 | "journal on remount"); | |
1da177e4 LT |
1127 | return 0; |
1128 | } | |
1129 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); | |
1130 | break; | |
1131 | case Opt_journal_inum: | |
1132 | if (is_remount) { | |
4cf46b67 AF |
1133 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1134 | "journal on remount"); | |
1da177e4 LT |
1135 | return 0; |
1136 | } | |
1137 | if (match_int(&args[0], &option)) | |
1138 | return 0; | |
1139 | *inum = option; | |
1140 | break; | |
71b96257 JL |
1141 | case Opt_journal_dev: |
1142 | if (is_remount) { | |
4cf46b67 AF |
1143 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1144 | "journal on remount"); | |
71b96257 JL |
1145 | return 0; |
1146 | } | |
1147 | if (match_int(&args[0], &option)) | |
1148 | return 0; | |
1149 | *journal_devnum = option; | |
1150 | break; | |
cf7eff46 ES |
1151 | case Opt_journal_path: |
1152 | if (is_remount) { | |
1153 | ext3_msg(sb, KERN_ERR, "error: cannot specify " | |
1154 | "journal on remount"); | |
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | journal_path = match_strdup(&args[0]); | |
1159 | if (!journal_path) { | |
1160 | ext3_msg(sb, KERN_ERR, "error: could not dup " | |
1161 | "journal device string"); | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1166 | if (error) { | |
1167 | ext3_msg(sb, KERN_ERR, "error: could not find " | |
1168 | "journal device path: error %d", error); | |
1169 | kfree(journal_path); | |
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | journal_inode = path.dentry->d_inode; | |
1174 | if (!S_ISBLK(journal_inode->i_mode)) { | |
1175 | ext3_msg(sb, KERN_ERR, "error: journal path %s " | |
1176 | "is not a block device", journal_path); | |
1177 | path_put(&path); | |
1178 | kfree(journal_path); | |
1179 | return 0; | |
1180 | } | |
1181 | ||
1182 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1183 | path_put(&path); | |
1184 | kfree(journal_path); | |
1185 | break; | |
1da177e4 LT |
1186 | case Opt_noload: |
1187 | set_opt (sbi->s_mount_opt, NOLOAD); | |
1188 | break; | |
1189 | case Opt_commit: | |
1190 | if (match_int(&args[0], &option)) | |
1191 | return 0; | |
1192 | if (option < 0) | |
1193 | return 0; | |
1194 | if (option == 0) | |
1195 | option = JBD_DEFAULT_MAX_COMMIT_AGE; | |
1196 | sbi->s_commit_interval = HZ * option; | |
1197 | break; | |
1198 | case Opt_data_journal: | |
1199 | data_opt = EXT3_MOUNT_JOURNAL_DATA; | |
1200 | goto datacheck; | |
1201 | case Opt_data_ordered: | |
1202 | data_opt = EXT3_MOUNT_ORDERED_DATA; | |
1203 | goto datacheck; | |
1204 | case Opt_data_writeback: | |
1205 | data_opt = EXT3_MOUNT_WRITEBACK_DATA; | |
1206 | datacheck: | |
1207 | if (is_remount) { | |
e3c96435 | 1208 | if (test_opt(sb, DATA_FLAGS) == data_opt) |
3c4cec65 | 1209 | break; |
4cf46b67 AF |
1210 | ext3_msg(sb, KERN_ERR, |
1211 | "error: cannot change " | |
3c4cec65 JK |
1212 | "data mode on remount. The filesystem " |
1213 | "is mounted in data=%s mode and you " | |
4cf46b67 | 1214 | "try to remount it in data=%s mode.", |
e3c96435 DM |
1215 | data_mode_string(test_opt(sb, |
1216 | DATA_FLAGS)), | |
3c4cec65 JK |
1217 | data_mode_string(data_opt)); |
1218 | return 0; | |
1da177e4 | 1219 | } else { |
e3c96435 | 1220 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
1da177e4 LT |
1221 | sbi->s_mount_opt |= data_opt; |
1222 | } | |
1223 | break; | |
0e4fb5e2 HK |
1224 | case Opt_data_err_abort: |
1225 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1226 | break; | |
1227 | case Opt_data_err_ignore: | |
1228 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1229 | break; | |
1da177e4 LT |
1230 | #ifdef CONFIG_QUOTA |
1231 | case Opt_usrjquota: | |
e1f5c67a | 1232 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
1da177e4 | 1233 | return 0; |
e1f5c67a DM |
1234 | break; |
1235 | case Opt_grpjquota: | |
1236 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
1da177e4 | 1237 | return 0; |
1da177e4 LT |
1238 | break; |
1239 | case Opt_offusrjquota: | |
e1f5c67a DM |
1240 | if (!clear_qf_name(sb, USRQUOTA)) |
1241 | return 0; | |
1242 | break; | |
1da177e4 | 1243 | case Opt_offgrpjquota: |
e1f5c67a | 1244 | if (!clear_qf_name(sb, GRPQUOTA)) |
1da177e4 | 1245 | return 0; |
1da177e4 LT |
1246 | break; |
1247 | case Opt_jqfmt_vfsold: | |
d06bf1d2 JK |
1248 | qfmt = QFMT_VFS_OLD; |
1249 | goto set_qf_format; | |
1da177e4 | 1250 | case Opt_jqfmt_vfsv0: |
d06bf1d2 | 1251 | qfmt = QFMT_VFS_V0; |
1aeec434 JK |
1252 | goto set_qf_format; |
1253 | case Opt_jqfmt_vfsv1: | |
1254 | qfmt = QFMT_VFS_V1; | |
d06bf1d2 | 1255 | set_qf_format: |
ee0d5ffe | 1256 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 | 1257 | sbi->s_jquota_fmt != qfmt) { |
4cf46b67 | 1258 | ext3_msg(sb, KERN_ERR, "error: cannot change " |
d06bf1d2 | 1259 | "journaled quota options when " |
4cf46b67 | 1260 | "quota turned on."); |
d06bf1d2 JK |
1261 | return 0; |
1262 | } | |
1263 | sbi->s_jquota_fmt = qfmt; | |
1da177e4 | 1264 | break; |
1f54587b | 1265 | case Opt_quota: |
8fc2751b MB |
1266 | case Opt_usrquota: |
1267 | set_opt(sbi->s_mount_opt, QUOTA); | |
1268 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1269 | break; | |
1270 | case Opt_grpquota: | |
1f54587b | 1271 | set_opt(sbi->s_mount_opt, QUOTA); |
8fc2751b | 1272 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
1f54587b JK |
1273 | break; |
1274 | case Opt_noquota: | |
ee0d5ffe | 1275 | if (sb_any_quota_loaded(sb)) { |
4cf46b67 AF |
1276 | ext3_msg(sb, KERN_ERR, "error: cannot change " |
1277 | "quota options when quota turned on."); | |
1f54587b JK |
1278 | return 0; |
1279 | } | |
1280 | clear_opt(sbi->s_mount_opt, QUOTA); | |
8fc2751b MB |
1281 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1282 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1f54587b | 1283 | break; |
1da177e4 | 1284 | #else |
8fc2751b MB |
1285 | case Opt_quota: |
1286 | case Opt_usrquota: | |
1287 | case Opt_grpquota: | |
4cf46b67 AF |
1288 | ext3_msg(sb, KERN_ERR, |
1289 | "error: quota options not supported."); | |
fa1ff1e0 | 1290 | break; |
1da177e4 LT |
1291 | case Opt_usrjquota: |
1292 | case Opt_grpjquota: | |
1293 | case Opt_offusrjquota: | |
1294 | case Opt_offgrpjquota: | |
1295 | case Opt_jqfmt_vfsold: | |
1296 | case Opt_jqfmt_vfsv0: | |
1aeec434 | 1297 | case Opt_jqfmt_vfsv1: |
4cf46b67 AF |
1298 | ext3_msg(sb, KERN_ERR, |
1299 | "error: journaled quota options not " | |
1300 | "supported."); | |
1da177e4 | 1301 | break; |
1f54587b JK |
1302 | case Opt_noquota: |
1303 | break; | |
1da177e4 LT |
1304 | #endif |
1305 | case Opt_abort: | |
1306 | set_opt(sbi->s_mount_opt, ABORT); | |
1307 | break; | |
0636c73e ES |
1308 | case Opt_nobarrier: |
1309 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1310 | break; | |
1da177e4 | 1311 | case Opt_barrier: |
0636c73e ES |
1312 | if (args[0].from) { |
1313 | if (match_int(&args[0], &option)) | |
1314 | return 0; | |
1315 | } else | |
1316 | option = 1; /* No argument, default to 1 */ | |
1da177e4 LT |
1317 | if (option) |
1318 | set_opt(sbi->s_mount_opt, BARRIER); | |
1319 | else | |
1320 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1321 | break; | |
1322 | case Opt_ignore: | |
1323 | break; | |
1324 | case Opt_resize: | |
08c6a96f | 1325 | if (!is_remount) { |
4cf46b67 AF |
1326 | ext3_msg(sb, KERN_ERR, |
1327 | "error: resize option only available " | |
1328 | "for remount"); | |
1da177e4 LT |
1329 | return 0; |
1330 | } | |
c7f1721e KZ |
1331 | if (match_int(&args[0], &option) != 0) |
1332 | return 0; | |
1da177e4 LT |
1333 | *n_blocks_count = option; |
1334 | break; | |
1335 | case Opt_nobh: | |
4c4d3901 CH |
1336 | ext3_msg(sb, KERN_WARNING, |
1337 | "warning: ignoring deprecated nobh option"); | |
1da177e4 | 1338 | break; |
ade1a29e | 1339 | case Opt_bh: |
4c4d3901 CH |
1340 | ext3_msg(sb, KERN_WARNING, |
1341 | "warning: ignoring deprecated bh option"); | |
ade1a29e | 1342 | break; |
1da177e4 | 1343 | default: |
4cf46b67 AF |
1344 | ext3_msg(sb, KERN_ERR, |
1345 | "error: unrecognized mount option \"%s\" " | |
1346 | "or missing value", p); | |
1da177e4 LT |
1347 | return 0; |
1348 | } | |
1349 | } | |
1350 | #ifdef CONFIG_QUOTA | |
8fc2751b | 1351 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
e3c96435 | 1352 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
8fc2751b | 1353 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
e3c96435 | 1354 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
8fc2751b MB |
1355 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
1356 | ||
e1f5c67a | 1357 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
4cf46b67 AF |
1358 | ext3_msg(sb, KERN_ERR, "error: old and new quota " |
1359 | "format mixing."); | |
8fc2751b MB |
1360 | return 0; |
1361 | } | |
1362 | ||
1363 | if (!sbi->s_jquota_fmt) { | |
4cf46b67 AF |
1364 | ext3_msg(sb, KERN_ERR, "error: journaled quota format " |
1365 | "not specified."); | |
8fc2751b MB |
1366 | return 0; |
1367 | } | |
1da177e4 LT |
1368 | } |
1369 | #endif | |
1da177e4 LT |
1370 | return 1; |
1371 | } | |
1372 | ||
1373 | static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es, | |
1374 | int read_only) | |
1375 | { | |
1376 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1377 | int res = 0; | |
1378 | ||
1379 | if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) { | |
4cf46b67 AF |
1380 | ext3_msg(sb, KERN_ERR, |
1381 | "error: revision level too high, " | |
1382 | "forcing read-only mode"); | |
1da177e4 LT |
1383 | res = MS_RDONLY; |
1384 | } | |
1385 | if (read_only) | |
1386 | return res; | |
1387 | if (!(sbi->s_mount_state & EXT3_VALID_FS)) | |
4cf46b67 AF |
1388 | ext3_msg(sb, KERN_WARNING, |
1389 | "warning: mounting unchecked fs, " | |
1390 | "running e2fsck is recommended"); | |
1da177e4 | 1391 | else if ((sbi->s_mount_state & EXT3_ERROR_FS)) |
4cf46b67 AF |
1392 | ext3_msg(sb, KERN_WARNING, |
1393 | "warning: mounting fs with errors, " | |
1394 | "running e2fsck is recommended"); | |
df0d6b8f | 1395 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
1da177e4 | 1396 | le16_to_cpu(es->s_mnt_count) >= |
df0d6b8f | 1397 | le16_to_cpu(es->s_max_mnt_count)) |
4cf46b67 AF |
1398 | ext3_msg(sb, KERN_WARNING, |
1399 | "warning: maximal mount count reached, " | |
1400 | "running e2fsck is recommended"); | |
1da177e4 LT |
1401 | else if (le32_to_cpu(es->s_checkinterval) && |
1402 | (le32_to_cpu(es->s_lastcheck) + | |
1403 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
4cf46b67 AF |
1404 | ext3_msg(sb, KERN_WARNING, |
1405 | "warning: checktime reached, " | |
1406 | "running e2fsck is recommended"); | |
1da177e4 LT |
1407 | #if 0 |
1408 | /* @@@ We _will_ want to clear the valid bit if we find | |
1409 | inconsistencies, to force a fsck at reboot. But for | |
1410 | a plain journaled filesystem we can keep it set as | |
1411 | valid forever! :) */ | |
e7f23ebd | 1412 | es->s_state &= cpu_to_le16(~EXT3_VALID_FS); |
1da177e4 | 1413 | #endif |
df0d6b8f | 1414 | if (!le16_to_cpu(es->s_max_mnt_count)) |
1da177e4 | 1415 | es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT); |
50e8a289 | 1416 | le16_add_cpu(&es->s_mnt_count, 1); |
1da177e4 LT |
1417 | es->s_mtime = cpu_to_le32(get_seconds()); |
1418 | ext3_update_dynamic_rev(sb); | |
1419 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1420 | ||
1421 | ext3_commit_super(sb, es, 1); | |
1422 | if (test_opt(sb, DEBUG)) | |
4cf46b67 AF |
1423 | ext3_msg(sb, KERN_INFO, "[bs=%lu, gc=%lu, " |
1424 | "bpg=%lu, ipg=%lu, mo=%04lx]", | |
1da177e4 LT |
1425 | sb->s_blocksize, |
1426 | sbi->s_groups_count, | |
1427 | EXT3_BLOCKS_PER_GROUP(sb), | |
1428 | EXT3_INODES_PER_GROUP(sb), | |
1429 | sbi->s_mount_opt); | |
1430 | ||
1da177e4 LT |
1431 | if (EXT3_SB(sb)->s_journal->j_inode == NULL) { |
1432 | char b[BDEVNAME_SIZE]; | |
4cf46b67 | 1433 | ext3_msg(sb, KERN_INFO, "using external journal on %s", |
1da177e4 LT |
1434 | bdevname(EXT3_SB(sb)->s_journal->j_dev, b)); |
1435 | } else { | |
4cf46b67 | 1436 | ext3_msg(sb, KERN_INFO, "using internal journal"); |
1da177e4 | 1437 | } |
d71bc6db | 1438 | cleancache_init_fs(sb); |
1da177e4 LT |
1439 | return res; |
1440 | } | |
1441 | ||
1442 | /* Called at mount-time, super-block is locked */ | |
197cd65a | 1443 | static int ext3_check_descriptors(struct super_block *sb) |
1da177e4 LT |
1444 | { |
1445 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1da177e4 LT |
1446 | int i; |
1447 | ||
1448 | ext3_debug ("Checking group descriptors"); | |
1449 | ||
197cd65a AM |
1450 | for (i = 0; i < sbi->s_groups_count; i++) { |
1451 | struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL); | |
1eaafeae AM |
1452 | ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i); |
1453 | ext3_fsblk_t last_block; | |
197cd65a | 1454 | |
855565e8 ES |
1455 | if (i == sbi->s_groups_count - 1) |
1456 | last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1; | |
1457 | else | |
1458 | last_block = first_block + | |
1459 | (EXT3_BLOCKS_PER_GROUP(sb) - 1); | |
1460 | ||
855565e8 ES |
1461 | if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || |
1462 | le32_to_cpu(gdp->bg_block_bitmap) > last_block) | |
1da177e4 LT |
1463 | { |
1464 | ext3_error (sb, "ext3_check_descriptors", | |
1465 | "Block bitmap for group %d" | |
1466 | " not in group (block %lu)!", | |
1467 | i, (unsigned long) | |
1468 | le32_to_cpu(gdp->bg_block_bitmap)); | |
1469 | return 0; | |
1470 | } | |
855565e8 ES |
1471 | if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || |
1472 | le32_to_cpu(gdp->bg_inode_bitmap) > last_block) | |
1da177e4 LT |
1473 | { |
1474 | ext3_error (sb, "ext3_check_descriptors", | |
1475 | "Inode bitmap for group %d" | |
1476 | " not in group (block %lu)!", | |
1477 | i, (unsigned long) | |
1478 | le32_to_cpu(gdp->bg_inode_bitmap)); | |
1479 | return 0; | |
1480 | } | |
855565e8 | 1481 | if (le32_to_cpu(gdp->bg_inode_table) < first_block || |
780dcdb2 | 1482 | le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 > |
855565e8 | 1483 | last_block) |
1da177e4 LT |
1484 | { |
1485 | ext3_error (sb, "ext3_check_descriptors", | |
1486 | "Inode table for group %d" | |
1487 | " not in group (block %lu)!", | |
1488 | i, (unsigned long) | |
1489 | le32_to_cpu(gdp->bg_inode_table)); | |
1490 | return 0; | |
1491 | } | |
1da177e4 LT |
1492 | } |
1493 | ||
1494 | sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb)); | |
1495 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb)); | |
1496 | return 1; | |
1497 | } | |
1498 | ||
1499 | ||
1500 | /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at | |
1501 | * the superblock) which were deleted from all directories, but held open by | |
1502 | * a process at the time of a crash. We walk the list and try to delete these | |
1503 | * inodes at recovery time (only with a read-write filesystem). | |
1504 | * | |
1505 | * In order to keep the orphan inode chain consistent during traversal (in | |
1506 | * case of crash during recovery), we link each inode into the superblock | |
1507 | * orphan list_head and handle it the same way as an inode deletion during | |
1508 | * normal operation (which journals the operations for us). | |
1509 | * | |
1510 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1511 | * accidentally point at an in-use or already deleted inode. The worst that | |
1512 | * can happen in this case is that we get a "bit already cleared" message from | |
1513 | * ext3_free_inode(). The only reason we would point at a wrong inode is if | |
1514 | * e2fsck was run on this filesystem, and it must have already done the orphan | |
1515 | * inode cleanup for us, so we can safely abort without any further action. | |
1516 | */ | |
1517 | static void ext3_orphan_cleanup (struct super_block * sb, | |
1518 | struct ext3_super_block * es) | |
1519 | { | |
1520 | unsigned int s_flags = sb->s_flags; | |
1521 | int nr_orphans = 0, nr_truncates = 0; | |
1522 | #ifdef CONFIG_QUOTA | |
1523 | int i; | |
1524 | #endif | |
1525 | if (!es->s_last_orphan) { | |
1526 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1527 | return; | |
1528 | } | |
1529 | ||
a8f48a95 | 1530 | if (bdev_read_only(sb->s_bdev)) { |
4cf46b67 AF |
1531 | ext3_msg(sb, KERN_ERR, "error: write access " |
1532 | "unavailable, skipping orphan cleanup."); | |
a8f48a95 ES |
1533 | return; |
1534 | } | |
1535 | ||
ce654b37 AG |
1536 | /* Check if feature set allows readwrite operations */ |
1537 | if (EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) { | |
1538 | ext3_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
1539 | "unknown ROCOMPAT features"); | |
1540 | return; | |
a8f48a95 ES |
1541 | } |
1542 | ||
1da177e4 | 1543 | if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { |
e4230108 ES |
1544 | /* don't clear list on RO mount w/ errors */ |
1545 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
1da177e4 LT |
1546 | jbd_debug(1, "Errors on filesystem, " |
1547 | "clearing orphan list.\n"); | |
e4230108 ES |
1548 | es->s_last_orphan = 0; |
1549 | } | |
1da177e4 LT |
1550 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
1551 | return; | |
1552 | } | |
1553 | ||
1554 | if (s_flags & MS_RDONLY) { | |
4cf46b67 | 1555 | ext3_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
1da177e4 LT |
1556 | sb->s_flags &= ~MS_RDONLY; |
1557 | } | |
1558 | #ifdef CONFIG_QUOTA | |
1559 | /* Needed for iput() to work correctly and not trash data */ | |
1560 | sb->s_flags |= MS_ACTIVE; | |
1561 | /* Turn on quotas so that they are updated correctly */ | |
a93114e4 | 1562 | for (i = 0; i < EXT3_MAXQUOTAS; i++) { |
1da177e4 LT |
1563 | if (EXT3_SB(sb)->s_qf_names[i]) { |
1564 | int ret = ext3_quota_on_mount(sb, i); | |
1565 | if (ret < 0) | |
4cf46b67 AF |
1566 | ext3_msg(sb, KERN_ERR, |
1567 | "error: cannot turn on journaled " | |
1568 | "quota: %d", ret); | |
1da177e4 LT |
1569 | } |
1570 | } | |
1571 | #endif | |
1572 | ||
1573 | while (es->s_last_orphan) { | |
1574 | struct inode *inode; | |
1575 | ||
473043dc DH |
1576 | inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1577 | if (IS_ERR(inode)) { | |
1da177e4 LT |
1578 | es->s_last_orphan = 0; |
1579 | break; | |
1580 | } | |
1581 | ||
1582 | list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan); | |
871a2931 | 1583 | dquot_initialize(inode); |
1da177e4 LT |
1584 | if (inode->i_nlink) { |
1585 | printk(KERN_DEBUG | |
eee194e7 | 1586 | "%s: truncating inode %lu to %Ld bytes\n", |
e05b6b52 | 1587 | __func__, inode->i_ino, inode->i_size); |
eee194e7 | 1588 | jbd_debug(2, "truncating inode %lu to %Ld bytes\n", |
1da177e4 LT |
1589 | inode->i_ino, inode->i_size); |
1590 | ext3_truncate(inode); | |
1591 | nr_truncates++; | |
1592 | } else { | |
1593 | printk(KERN_DEBUG | |
eee194e7 | 1594 | "%s: deleting unreferenced inode %lu\n", |
e05b6b52 | 1595 | __func__, inode->i_ino); |
eee194e7 | 1596 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1da177e4 LT |
1597 | inode->i_ino); |
1598 | nr_orphans++; | |
1599 | } | |
1600 | iput(inode); /* The delete magic happens here! */ | |
1601 | } | |
1602 | ||
1603 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" | |
1604 | ||
1605 | if (nr_orphans) | |
4cf46b67 AF |
1606 | ext3_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
1607 | PLURAL(nr_orphans)); | |
1da177e4 | 1608 | if (nr_truncates) |
4cf46b67 AF |
1609 | ext3_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
1610 | PLURAL(nr_truncates)); | |
1da177e4 LT |
1611 | #ifdef CONFIG_QUOTA |
1612 | /* Turn quotas off */ | |
a93114e4 | 1613 | for (i = 0; i < EXT3_MAXQUOTAS; i++) { |
1da177e4 | 1614 | if (sb_dqopt(sb)->files[i]) |
287a8095 | 1615 | dquot_quota_off(sb, i); |
1da177e4 LT |
1616 | } |
1617 | #endif | |
1618 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1619 | } | |
1620 | ||
1da177e4 LT |
1621 | /* |
1622 | * Maximal file size. There is a direct, and {,double-,triple-}indirect | |
1623 | * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. | |
1624 | * We need to be 1 filesystem block less than the 2^32 sector limit. | |
1625 | */ | |
1626 | static loff_t ext3_max_size(int bits) | |
1627 | { | |
1628 | loff_t res = EXT3_NDIR_BLOCKS; | |
fe7fdc37 AK |
1629 | int meta_blocks; |
1630 | loff_t upper_limit; | |
1631 | ||
1632 | /* This is calculated to be the largest file size for a | |
1633 | * dense, file such that the total number of | |
1da177e4 | 1634 | * sectors in the file, including data and all indirect blocks, |
fe7fdc37 AK |
1635 | * does not exceed 2^32 -1 |
1636 | * __u32 i_blocks representing the total number of | |
1637 | * 512 bytes blocks of the file | |
1638 | */ | |
1639 | upper_limit = (1LL << 32) - 1; | |
1640 | ||
1641 | /* total blocks in file system block size */ | |
1642 | upper_limit >>= (bits - 9); | |
1643 | ||
1644 | ||
1645 | /* indirect blocks */ | |
1646 | meta_blocks = 1; | |
1647 | /* double indirect blocks */ | |
1648 | meta_blocks += 1 + (1LL << (bits-2)); | |
1649 | /* tripple indirect blocks */ | |
1650 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1651 | ||
1652 | upper_limit -= meta_blocks; | |
1653 | upper_limit <<= bits; | |
1da177e4 LT |
1654 | |
1655 | res += 1LL << (bits-2); | |
1656 | res += 1LL << (2*(bits-2)); | |
1657 | res += 1LL << (3*(bits-2)); | |
1658 | res <<= bits; | |
1659 | if (res > upper_limit) | |
1660 | res = upper_limit; | |
fe7fdc37 AK |
1661 | |
1662 | if (res > MAX_LFS_FILESIZE) | |
1663 | res = MAX_LFS_FILESIZE; | |
1664 | ||
1da177e4 LT |
1665 | return res; |
1666 | } | |
1667 | ||
43d23f90 MC |
1668 | static ext3_fsblk_t descriptor_loc(struct super_block *sb, |
1669 | ext3_fsblk_t logic_sb_block, | |
1da177e4 LT |
1670 | int nr) |
1671 | { | |
1672 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 1673 | unsigned long bg, first_meta_bg; |
1da177e4 LT |
1674 | int has_super = 0; |
1675 | ||
1da177e4 LT |
1676 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
1677 | ||
1678 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) || | |
1679 | nr < first_meta_bg) | |
1680 | return (logic_sb_block + nr + 1); | |
1681 | bg = sbi->s_desc_per_block * nr; | |
1682 | if (ext3_bg_has_super(sb, bg)) | |
1683 | has_super = 1; | |
43d23f90 | 1684 | return (has_super + ext3_group_first_block_no(sb, bg)); |
1da177e4 LT |
1685 | } |
1686 | ||
1687 | ||
1688 | static int ext3_fill_super (struct super_block *sb, void *data, int silent) | |
1689 | { | |
1690 | struct buffer_head * bh; | |
1691 | struct ext3_super_block *es = NULL; | |
1692 | struct ext3_sb_info *sbi; | |
43d23f90 | 1693 | ext3_fsblk_t block; |
4cf46b67 | 1694 | ext3_fsblk_t sb_block = get_sb_block(&data, sb); |
43d23f90 | 1695 | ext3_fsblk_t logic_sb_block; |
1da177e4 | 1696 | unsigned long offset = 0; |
eee194e7 | 1697 | unsigned int journal_inum = 0; |
71b96257 | 1698 | unsigned long journal_devnum = 0; |
1da177e4 LT |
1699 | unsigned long def_mount_opts; |
1700 | struct inode *root; | |
1701 | int blocksize; | |
1702 | int hblock; | |
1703 | int db_count; | |
1704 | int i; | |
1705 | int needs_recovery; | |
473043dc | 1706 | int ret = -EINVAL; |
1da177e4 | 1707 | __le32 features; |
833f4077 | 1708 | int err; |
1da177e4 | 1709 | |
f8314dc6 | 1710 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
1711 | if (!sbi) |
1712 | return -ENOMEM; | |
5df096d6 PE |
1713 | |
1714 | sbi->s_blockgroup_lock = | |
1715 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
1716 | if (!sbi->s_blockgroup_lock) { | |
1717 | kfree(sbi); | |
1718 | return -ENOMEM; | |
1719 | } | |
1da177e4 | 1720 | sb->s_fs_info = sbi; |
571beed8 | 1721 | sbi->s_sb_block = sb_block; |
1da177e4 | 1722 | |
1da177e4 LT |
1723 | blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); |
1724 | if (!blocksize) { | |
4cf46b67 | 1725 | ext3_msg(sb, KERN_ERR, "error: unable to set blocksize"); |
1da177e4 LT |
1726 | goto out_fail; |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | * The ext3 superblock will not be buffer aligned for other than 1kB | |
1731 | * block sizes. We need to calculate the offset from buffer start. | |
1732 | */ | |
1733 | if (blocksize != EXT3_MIN_BLOCK_SIZE) { | |
1734 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; | |
1735 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1736 | } else { | |
1737 | logic_sb_block = sb_block; | |
1738 | } | |
1739 | ||
1740 | if (!(bh = sb_bread(sb, logic_sb_block))) { | |
4cf46b67 | 1741 | ext3_msg(sb, KERN_ERR, "error: unable to read superblock"); |
1da177e4 LT |
1742 | goto out_fail; |
1743 | } | |
1744 | /* | |
1745 | * Note: s_es must be initialized as soon as possible because | |
1746 | * some ext3 macro-instructions depend on its value | |
1747 | */ | |
57e94d86 | 1748 | es = (struct ext3_super_block *) (bh->b_data + offset); |
1da177e4 LT |
1749 | sbi->s_es = es; |
1750 | sb->s_magic = le16_to_cpu(es->s_magic); | |
1751 | if (sb->s_magic != EXT3_SUPER_MAGIC) | |
1752 | goto cantfind_ext3; | |
1753 | ||
1754 | /* Set defaults before we parse the mount options */ | |
1755 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
1756 | if (def_mount_opts & EXT3_DEFM_DEBUG) | |
1757 | set_opt(sbi->s_mount_opt, DEBUG); | |
1758 | if (def_mount_opts & EXT3_DEFM_BSDGROUPS) | |
1759 | set_opt(sbi->s_mount_opt, GRPID); | |
1760 | if (def_mount_opts & EXT3_DEFM_UID16) | |
1761 | set_opt(sbi->s_mount_opt, NO_UID32); | |
2e7842b8 | 1762 | #ifdef CONFIG_EXT3_FS_XATTR |
1da177e4 LT |
1763 | if (def_mount_opts & EXT3_DEFM_XATTR_USER) |
1764 | set_opt(sbi->s_mount_opt, XATTR_USER); | |
2e7842b8 HD |
1765 | #endif |
1766 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1da177e4 LT |
1767 | if (def_mount_opts & EXT3_DEFM_ACL) |
1768 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
2e7842b8 | 1769 | #endif |
1da177e4 | 1770 | if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA) |
e3c96435 | 1771 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
1da177e4 | 1772 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED) |
e3c96435 | 1773 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
1da177e4 | 1774 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK) |
e3c96435 | 1775 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
1da177e4 LT |
1776 | |
1777 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC) | |
1778 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1eca93f9 | 1779 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE) |
2245d7c2 | 1780 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
1eca93f9 AK |
1781 | else |
1782 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
1da177e4 | 1783 | |
1523299d EB |
1784 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
1785 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
1da177e4 | 1786 | |
00eacd66 CH |
1787 | /* enable barriers by default */ |
1788 | set_opt(sbi->s_mount_opt, BARRIER); | |
1da177e4 LT |
1789 | set_opt(sbi->s_mount_opt, RESERVATION); |
1790 | ||
71b96257 JL |
1791 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
1792 | NULL, 0)) | |
1da177e4 LT |
1793 | goto failed_mount; |
1794 | ||
1795 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
e3c96435 | 1796 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
1da177e4 LT |
1797 | |
1798 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV && | |
1799 | (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1800 | EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1801 | EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
4cf46b67 AF |
1802 | ext3_msg(sb, KERN_WARNING, |
1803 | "warning: feature flags set on rev 0 fs, " | |
1804 | "running e2fsck is recommended"); | |
1da177e4 LT |
1805 | /* |
1806 | * Check feature flags regardless of the revision level, since we | |
1807 | * previously didn't change the revision level when setting the flags, | |
1808 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
1809 | */ | |
1810 | features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP); | |
1811 | if (features) { | |
4cf46b67 AF |
1812 | ext3_msg(sb, KERN_ERR, |
1813 | "error: couldn't mount because of unsupported " | |
1814 | "optional features (%x)", le32_to_cpu(features)); | |
1da177e4 LT |
1815 | goto failed_mount; |
1816 | } | |
1817 | features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP); | |
1818 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
4cf46b67 AF |
1819 | ext3_msg(sb, KERN_ERR, |
1820 | "error: couldn't mount RDWR because of unsupported " | |
1821 | "optional features (%x)", le32_to_cpu(features)); | |
1da177e4 LT |
1822 | goto failed_mount; |
1823 | } | |
1824 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
1825 | ||
1826 | if (blocksize < EXT3_MIN_BLOCK_SIZE || | |
1827 | blocksize > EXT3_MAX_BLOCK_SIZE) { | |
4cf46b67 AF |
1828 | ext3_msg(sb, KERN_ERR, |
1829 | "error: couldn't mount because of unsupported " | |
1830 | "filesystem blocksize %d", blocksize); | |
1da177e4 LT |
1831 | goto failed_mount; |
1832 | } | |
1833 | ||
e1defc4f | 1834 | hblock = bdev_logical_block_size(sb->s_bdev); |
1da177e4 LT |
1835 | if (sb->s_blocksize != blocksize) { |
1836 | /* | |
1837 | * Make sure the blocksize for the filesystem is larger | |
1838 | * than the hardware sectorsize for the machine. | |
1839 | */ | |
1840 | if (blocksize < hblock) { | |
4cf46b67 AF |
1841 | ext3_msg(sb, KERN_ERR, |
1842 | "error: fsblocksize %d too small for " | |
1843 | "hardware sectorsize %d", blocksize, hblock); | |
1da177e4 LT |
1844 | goto failed_mount; |
1845 | } | |
1846 | ||
1847 | brelse (bh); | |
0f0a89eb | 1848 | if (!sb_set_blocksize(sb, blocksize)) { |
4cf46b67 AF |
1849 | ext3_msg(sb, KERN_ERR, |
1850 | "error: bad blocksize %d", blocksize); | |
0f0a89eb TS |
1851 | goto out_fail; |
1852 | } | |
1da177e4 LT |
1853 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; |
1854 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1855 | bh = sb_bread(sb, logic_sb_block); | |
1856 | if (!bh) { | |
4cf46b67 AF |
1857 | ext3_msg(sb, KERN_ERR, |
1858 | "error: can't read superblock on 2nd try"); | |
1da177e4 LT |
1859 | goto failed_mount; |
1860 | } | |
57e94d86 | 1861 | es = (struct ext3_super_block *)(bh->b_data + offset); |
1da177e4 LT |
1862 | sbi->s_es = es; |
1863 | if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) { | |
4cf46b67 AF |
1864 | ext3_msg(sb, KERN_ERR, |
1865 | "error: magic mismatch"); | |
1da177e4 LT |
1866 | goto failed_mount; |
1867 | } | |
1868 | } | |
1869 | ||
1870 | sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits); | |
1871 | ||
1872 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) { | |
1873 | sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE; | |
1874 | sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO; | |
1875 | } else { | |
1876 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
1877 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
1878 | if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) || | |
3fc74269 | 1879 | (!is_power_of_2(sbi->s_inode_size)) || |
1da177e4 | 1880 | (sbi->s_inode_size > blocksize)) { |
4cf46b67 AF |
1881 | ext3_msg(sb, KERN_ERR, |
1882 | "error: unsupported inode size: %d", | |
1da177e4 LT |
1883 | sbi->s_inode_size); |
1884 | goto failed_mount; | |
1885 | } | |
1886 | } | |
1887 | sbi->s_frag_size = EXT3_MIN_FRAG_SIZE << | |
1888 | le32_to_cpu(es->s_log_frag_size); | |
1889 | if (blocksize != sbi->s_frag_size) { | |
4cf46b67 AF |
1890 | ext3_msg(sb, KERN_ERR, |
1891 | "error: fragsize %lu != blocksize %u (unsupported)", | |
1da177e4 LT |
1892 | sbi->s_frag_size, blocksize); |
1893 | goto failed_mount; | |
1894 | } | |
1895 | sbi->s_frags_per_block = 1; | |
1896 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); | |
1897 | sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); | |
1898 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); | |
b47b6f38 | 1899 | if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0) |
1da177e4 LT |
1900 | goto cantfind_ext3; |
1901 | sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb); | |
1902 | if (sbi->s_inodes_per_block == 0) | |
1903 | goto cantfind_ext3; | |
1904 | sbi->s_itb_per_group = sbi->s_inodes_per_group / | |
1905 | sbi->s_inodes_per_block; | |
1906 | sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc); | |
1907 | sbi->s_sbh = bh; | |
1908 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
f0d1b0b3 DH |
1909 | sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb)); |
1910 | sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb)); | |
1da177e4 LT |
1911 | for (i=0; i < 4; i++) |
1912 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
1913 | sbi->s_def_hash_version = es->s_def_hash_version; | |
5e1f8c9e TT |
1914 | i = le32_to_cpu(es->s_flags); |
1915 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
1916 | sbi->s_hash_unsigned = 3; | |
1917 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
1918 | #ifdef __CHAR_UNSIGNED__ | |
1919 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
1920 | sbi->s_hash_unsigned = 3; | |
1921 | #else | |
1922 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
1923 | #endif | |
5e1f8c9e | 1924 | } |
1da177e4 LT |
1925 | |
1926 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
4cf46b67 AF |
1927 | ext3_msg(sb, KERN_ERR, |
1928 | "#blocks per group too big: %lu", | |
1da177e4 LT |
1929 | sbi->s_blocks_per_group); |
1930 | goto failed_mount; | |
1931 | } | |
1932 | if (sbi->s_frags_per_group > blocksize * 8) { | |
4cf46b67 AF |
1933 | ext3_msg(sb, KERN_ERR, |
1934 | "error: #fragments per group too big: %lu", | |
1da177e4 LT |
1935 | sbi->s_frags_per_group); |
1936 | goto failed_mount; | |
1937 | } | |
1938 | if (sbi->s_inodes_per_group > blocksize * 8) { | |
4cf46b67 AF |
1939 | ext3_msg(sb, KERN_ERR, |
1940 | "error: #inodes per group too big: %lu", | |
1da177e4 LT |
1941 | sbi->s_inodes_per_group); |
1942 | goto failed_mount; | |
1943 | } | |
1944 | ||
ad692bf3 DW |
1945 | err = generic_check_addressable(sb->s_blocksize_bits, |
1946 | le32_to_cpu(es->s_blocks_count)); | |
1947 | if (err) { | |
4cf46b67 AF |
1948 | ext3_msg(sb, KERN_ERR, |
1949 | "error: filesystem is too large to mount safely"); | |
fcd5df35 | 1950 | if (sizeof(sector_t) < 8) |
4cf46b67 AF |
1951 | ext3_msg(sb, KERN_ERR, |
1952 | "error: CONFIG_LBDAF not enabled"); | |
ad692bf3 | 1953 | ret = err; |
fcd5df35 MC |
1954 | goto failed_mount; |
1955 | } | |
1956 | ||
1da177e4 LT |
1957 | if (EXT3_BLOCKS_PER_GROUP(sb) == 0) |
1958 | goto cantfind_ext3; | |
855565e8 ES |
1959 | sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - |
1960 | le32_to_cpu(es->s_first_data_block) - 1) | |
1961 | / EXT3_BLOCKS_PER_GROUP(sb)) + 1; | |
81a4e320 | 1962 | db_count = DIV_ROUND_UP(sbi->s_groups_count, EXT3_DESC_PER_BLOCK(sb)); |
1da177e4 LT |
1963 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), |
1964 | GFP_KERNEL); | |
1965 | if (sbi->s_group_desc == NULL) { | |
4cf46b67 AF |
1966 | ext3_msg(sb, KERN_ERR, |
1967 | "error: not enough memory"); | |
4569cd1b | 1968 | ret = -ENOMEM; |
1da177e4 LT |
1969 | goto failed_mount; |
1970 | } | |
1971 | ||
5df096d6 | 1972 | bgl_lock_init(sbi->s_blockgroup_lock); |
1da177e4 LT |
1973 | |
1974 | for (i = 0; i < db_count; i++) { | |
1975 | block = descriptor_loc(sb, logic_sb_block, i); | |
1976 | sbi->s_group_desc[i] = sb_bread(sb, block); | |
1977 | if (!sbi->s_group_desc[i]) { | |
4cf46b67 AF |
1978 | ext3_msg(sb, KERN_ERR, |
1979 | "error: can't read group descriptor %d", i); | |
1da177e4 LT |
1980 | db_count = i; |
1981 | goto failed_mount2; | |
1982 | } | |
1983 | } | |
1984 | if (!ext3_check_descriptors (sb)) { | |
4cf46b67 AF |
1985 | ext3_msg(sb, KERN_ERR, |
1986 | "error: group descriptors corrupted"); | |
1da177e4 LT |
1987 | goto failed_mount2; |
1988 | } | |
1989 | sbi->s_gdb_count = db_count; | |
1990 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1991 | spin_lock_init(&sbi->s_next_gen_lock); | |
0216bfcf | 1992 | |
1da177e4 LT |
1993 | /* per fileystem reservation list head & lock */ |
1994 | spin_lock_init(&sbi->s_rsv_window_lock); | |
1995 | sbi->s_rsv_window_root = RB_ROOT; | |
1996 | /* Add a single, static dummy reservation to the start of the | |
1997 | * reservation window list --- it gives us a placeholder for | |
1998 | * append-at-start-of-list which makes the allocation logic | |
1999 | * _much_ simpler. */ | |
2000 | sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
2001 | sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
2002 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; | |
2003 | sbi->s_rsv_window_head.rsv_goal_size = 0; | |
2004 | ext3_rsv_window_add(sb, &sbi->s_rsv_window_head); | |
2005 | ||
2006 | /* | |
2007 | * set up enough so that it can read an inode | |
2008 | */ | |
2009 | sb->s_op = &ext3_sops; | |
2010 | sb->s_export_op = &ext3_export_ops; | |
2011 | sb->s_xattr = ext3_xattr_handlers; | |
2012 | #ifdef CONFIG_QUOTA | |
2013 | sb->s_qcop = &ext3_qctl_operations; | |
2014 | sb->dq_op = &ext3_quota_operations; | |
4018cfbc | 2015 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
1da177e4 | 2016 | #endif |
03cb5f03 | 2017 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
1da177e4 | 2018 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
b8a052d0 | 2019 | mutex_init(&sbi->s_orphan_lock); |
96d2a495 | 2020 | mutex_init(&sbi->s_resize_lock); |
1da177e4 LT |
2021 | |
2022 | sb->s_root = NULL; | |
2023 | ||
2024 | needs_recovery = (es->s_last_orphan != 0 || | |
2025 | EXT3_HAS_INCOMPAT_FEATURE(sb, | |
2026 | EXT3_FEATURE_INCOMPAT_RECOVER)); | |
2027 | ||
2028 | /* | |
2029 | * The first inode we look at is the journal inode. Don't try | |
2030 | * root first: it may be modified in the journal! | |
2031 | */ | |
2032 | if (!test_opt(sb, NOLOAD) && | |
2033 | EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { | |
71b96257 | 2034 | if (ext3_load_journal(sb, es, journal_devnum)) |
41d1a636 | 2035 | goto failed_mount2; |
1da177e4 LT |
2036 | } else if (journal_inum) { |
2037 | if (ext3_create_journal(sb, es, journal_inum)) | |
41d1a636 | 2038 | goto failed_mount2; |
1da177e4 LT |
2039 | } else { |
2040 | if (!silent) | |
4cf46b67 AF |
2041 | ext3_msg(sb, KERN_ERR, |
2042 | "error: no journal found. " | |
2043 | "mounting ext3 over ext2?"); | |
41d1a636 DM |
2044 | goto failed_mount2; |
2045 | } | |
2046 | err = percpu_counter_init(&sbi->s_freeblocks_counter, | |
908c7f19 | 2047 | ext3_count_free_blocks(sb), GFP_KERNEL); |
41d1a636 DM |
2048 | if (!err) { |
2049 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
908c7f19 | 2050 | ext3_count_free_inodes(sb), GFP_KERNEL); |
41d1a636 DM |
2051 | } |
2052 | if (!err) { | |
2053 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
908c7f19 | 2054 | ext3_count_dirs(sb), GFP_KERNEL); |
41d1a636 DM |
2055 | } |
2056 | if (err) { | |
2057 | ext3_msg(sb, KERN_ERR, "error: insufficient memory"); | |
4569cd1b | 2058 | ret = err; |
0216bfcf | 2059 | goto failed_mount3; |
1da177e4 LT |
2060 | } |
2061 | ||
2062 | /* We have now updated the journal if required, so we can | |
2063 | * validate the data journaling mode. */ | |
2064 | switch (test_opt(sb, DATA_FLAGS)) { | |
2065 | case 0: | |
2066 | /* No mode set, assume a default based on the journal | |
2067 | capabilities: ORDERED_DATA if the journal can | |
2068 | cope, else JOURNAL_DATA */ | |
2069 | if (journal_check_available_features | |
2070 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) | |
bbae8bcc | 2071 | set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE); |
1da177e4 LT |
2072 | else |
2073 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2074 | break; | |
2075 | ||
2076 | case EXT3_MOUNT_ORDERED_DATA: | |
2077 | case EXT3_MOUNT_WRITEBACK_DATA: | |
2078 | if (!journal_check_available_features | |
2079 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) { | |
4cf46b67 AF |
2080 | ext3_msg(sb, KERN_ERR, |
2081 | "error: journal does not support " | |
2082 | "requested data journaling mode"); | |
41d1a636 | 2083 | goto failed_mount3; |
1da177e4 LT |
2084 | } |
2085 | default: | |
2086 | break; | |
2087 | } | |
2088 | ||
1da177e4 LT |
2089 | /* |
2090 | * The journal_load will have done any necessary log recovery, | |
2091 | * so we can safely mount the rest of the filesystem now. | |
2092 | */ | |
2093 | ||
473043dc DH |
2094 | root = ext3_iget(sb, EXT3_ROOT_INO); |
2095 | if (IS_ERR(root)) { | |
4cf46b67 | 2096 | ext3_msg(sb, KERN_ERR, "error: get root inode failed"); |
473043dc | 2097 | ret = PTR_ERR(root); |
41d1a636 | 2098 | goto failed_mount3; |
1da177e4 LT |
2099 | } |
2100 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
473043dc | 2101 | iput(root); |
4cf46b67 | 2102 | ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck"); |
41d1a636 | 2103 | goto failed_mount3; |
1da177e4 | 2104 | } |
48fde701 | 2105 | sb->s_root = d_make_root(root); |
473043dc | 2106 | if (!sb->s_root) { |
4cf46b67 | 2107 | ext3_msg(sb, KERN_ERR, "error: get root dentry failed"); |
473043dc | 2108 | ret = -ENOMEM; |
41d1a636 | 2109 | goto failed_mount3; |
473043dc | 2110 | } |
1da177e4 | 2111 | |
f007dbf8 ES |
2112 | if (ext3_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
2113 | sb->s_flags |= MS_RDONLY; | |
ed505ee4 | 2114 | |
1da177e4 LT |
2115 | EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS; |
2116 | ext3_orphan_cleanup(sb, es); | |
2117 | EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS; | |
63894ab9 EG |
2118 | if (needs_recovery) { |
2119 | ext3_mark_recovery_complete(sb, es); | |
4cf46b67 | 2120 | ext3_msg(sb, KERN_INFO, "recovery complete"); |
63894ab9 | 2121 | } |
4cf46b67 | 2122 | ext3_msg(sb, KERN_INFO, "mounted filesystem with %s data mode", |
1da177e4 LT |
2123 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal": |
2124 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered": | |
2125 | "writeback"); | |
2126 | ||
1da177e4 LT |
2127 | return 0; |
2128 | ||
2129 | cantfind_ext3: | |
2130 | if (!silent) | |
4cf46b67 AF |
2131 | ext3_msg(sb, KERN_INFO, |
2132 | "error: can't find ext3 filesystem on dev %s.", | |
1da177e4 LT |
2133 | sb->s_id); |
2134 | goto failed_mount; | |
2135 | ||
0216bfcf MC |
2136 | failed_mount3: |
2137 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2138 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2139 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
41d1a636 | 2140 | journal_destroy(sbi->s_journal); |
1da177e4 LT |
2141 | failed_mount2: |
2142 | for (i = 0; i < db_count; i++) | |
2143 | brelse(sbi->s_group_desc[i]); | |
2144 | kfree(sbi->s_group_desc); | |
2145 | failed_mount: | |
2146 | #ifdef CONFIG_QUOTA | |
a93114e4 | 2147 | for (i = 0; i < EXT3_MAXQUOTAS; i++) |
1da177e4 LT |
2148 | kfree(sbi->s_qf_names[i]); |
2149 | #endif | |
2150 | ext3_blkdev_remove(sbi); | |
2151 | brelse(bh); | |
2152 | out_fail: | |
2153 | sb->s_fs_info = NULL; | |
de5ce037 | 2154 | kfree(sbi->s_blockgroup_lock); |
1da177e4 | 2155 | kfree(sbi); |
473043dc | 2156 | return ret; |
1da177e4 LT |
2157 | } |
2158 | ||
2159 | /* | |
2160 | * Setup any per-fs journal parameters now. We'll do this both on | |
2161 | * initial mount, once the journal has been initialised but before we've | |
ae6ddcc5 | 2162 | * done any recovery; and again on any subsequent remount. |
1da177e4 LT |
2163 | */ |
2164 | static void ext3_init_journal_params(struct super_block *sb, journal_t *journal) | |
2165 | { | |
2166 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
2167 | ||
2168 | if (sbi->s_commit_interval) | |
2169 | journal->j_commit_interval = sbi->s_commit_interval; | |
2170 | /* We could also set up an ext3-specific default for the commit | |
2171 | * interval here, but for now we'll just fall back to the jbd | |
2172 | * default. */ | |
2173 | ||
2174 | spin_lock(&journal->j_state_lock); | |
2175 | if (test_opt(sb, BARRIER)) | |
2176 | journal->j_flags |= JFS_BARRIER; | |
2177 | else | |
2178 | journal->j_flags &= ~JFS_BARRIER; | |
0e4fb5e2 HK |
2179 | if (test_opt(sb, DATA_ERR_ABORT)) |
2180 | journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR; | |
2181 | else | |
2182 | journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR; | |
1da177e4 LT |
2183 | spin_unlock(&journal->j_state_lock); |
2184 | } | |
2185 | ||
eee194e7 ES |
2186 | static journal_t *ext3_get_journal(struct super_block *sb, |
2187 | unsigned int journal_inum) | |
1da177e4 LT |
2188 | { |
2189 | struct inode *journal_inode; | |
2190 | journal_t *journal; | |
2191 | ||
2192 | /* First, test for the existence of a valid inode on disk. Bad | |
2193 | * things happen if we iget() an unused inode, as the subsequent | |
2194 | * iput() will try to delete it. */ | |
2195 | ||
473043dc DH |
2196 | journal_inode = ext3_iget(sb, journal_inum); |
2197 | if (IS_ERR(journal_inode)) { | |
4cf46b67 | 2198 | ext3_msg(sb, KERN_ERR, "error: no journal found"); |
1da177e4 LT |
2199 | return NULL; |
2200 | } | |
2201 | if (!journal_inode->i_nlink) { | |
2202 | make_bad_inode(journal_inode); | |
2203 | iput(journal_inode); | |
4cf46b67 | 2204 | ext3_msg(sb, KERN_ERR, "error: journal inode is deleted"); |
1da177e4 LT |
2205 | return NULL; |
2206 | } | |
2207 | ||
2208 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", | |
2209 | journal_inode, journal_inode->i_size); | |
473043dc | 2210 | if (!S_ISREG(journal_inode->i_mode)) { |
4cf46b67 | 2211 | ext3_msg(sb, KERN_ERR, "error: invalid journal inode"); |
1da177e4 LT |
2212 | iput(journal_inode); |
2213 | return NULL; | |
2214 | } | |
2215 | ||
2216 | journal = journal_init_inode(journal_inode); | |
2217 | if (!journal) { | |
4cf46b67 | 2218 | ext3_msg(sb, KERN_ERR, "error: could not load journal inode"); |
1da177e4 LT |
2219 | iput(journal_inode); |
2220 | return NULL; | |
2221 | } | |
2222 | journal->j_private = sb; | |
2223 | ext3_init_journal_params(sb, journal); | |
2224 | return journal; | |
2225 | } | |
2226 | ||
2227 | static journal_t *ext3_get_dev_journal(struct super_block *sb, | |
2228 | dev_t j_dev) | |
2229 | { | |
2230 | struct buffer_head * bh; | |
2231 | journal_t *journal; | |
43d23f90 | 2232 | ext3_fsblk_t start; |
1c2bf374 | 2233 | ext3_fsblk_t len; |
1da177e4 | 2234 | int hblock, blocksize; |
43d23f90 | 2235 | ext3_fsblk_t sb_block; |
1da177e4 LT |
2236 | unsigned long offset; |
2237 | struct ext3_super_block * es; | |
2238 | struct block_device *bdev; | |
2239 | ||
4cf46b67 | 2240 | bdev = ext3_blkdev_get(j_dev, sb); |
1da177e4 LT |
2241 | if (bdev == NULL) |
2242 | return NULL; | |
2243 | ||
1da177e4 | 2244 | blocksize = sb->s_blocksize; |
e1defc4f | 2245 | hblock = bdev_logical_block_size(bdev); |
1da177e4 | 2246 | if (blocksize < hblock) { |
4cf46b67 AF |
2247 | ext3_msg(sb, KERN_ERR, |
2248 | "error: blocksize too small for journal device"); | |
1da177e4 LT |
2249 | goto out_bdev; |
2250 | } | |
2251 | ||
2252 | sb_block = EXT3_MIN_BLOCK_SIZE / blocksize; | |
2253 | offset = EXT3_MIN_BLOCK_SIZE % blocksize; | |
2254 | set_blocksize(bdev, blocksize); | |
2255 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
4cf46b67 AF |
2256 | ext3_msg(sb, KERN_ERR, "error: couldn't read superblock of " |
2257 | "external journal"); | |
1da177e4 LT |
2258 | goto out_bdev; |
2259 | } | |
2260 | ||
57e94d86 | 2261 | es = (struct ext3_super_block *) (bh->b_data + offset); |
1da177e4 LT |
2262 | if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) || |
2263 | !(le32_to_cpu(es->s_feature_incompat) & | |
2264 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
4cf46b67 AF |
2265 | ext3_msg(sb, KERN_ERR, "error: external journal has " |
2266 | "bad superblock"); | |
1da177e4 LT |
2267 | brelse(bh); |
2268 | goto out_bdev; | |
2269 | } | |
2270 | ||
2271 | if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { | |
4cf46b67 | 2272 | ext3_msg(sb, KERN_ERR, "error: journal UUID does not match"); |
1da177e4 LT |
2273 | brelse(bh); |
2274 | goto out_bdev; | |
2275 | } | |
2276 | ||
2277 | len = le32_to_cpu(es->s_blocks_count); | |
2278 | start = sb_block + 1; | |
2279 | brelse(bh); /* we're done with the superblock */ | |
2280 | ||
2281 | journal = journal_init_dev(bdev, sb->s_bdev, | |
2282 | start, len, blocksize); | |
2283 | if (!journal) { | |
4cf46b67 AF |
2284 | ext3_msg(sb, KERN_ERR, |
2285 | "error: failed to create device journal"); | |
1da177e4 LT |
2286 | goto out_bdev; |
2287 | } | |
2288 | journal->j_private = sb; | |
d03e1292 ZL |
2289 | if (!bh_uptodate_or_lock(journal->j_sb_buffer)) { |
2290 | if (bh_submit_read(journal->j_sb_buffer)) { | |
2291 | ext3_msg(sb, KERN_ERR, "I/O error on journal device"); | |
2292 | goto out_journal; | |
2293 | } | |
1da177e4 LT |
2294 | } |
2295 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
4cf46b67 AF |
2296 | ext3_msg(sb, KERN_ERR, |
2297 | "error: external journal has more than one " | |
2298 | "user (unsupported) - %d", | |
1da177e4 LT |
2299 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
2300 | goto out_journal; | |
2301 | } | |
2302 | EXT3_SB(sb)->journal_bdev = bdev; | |
2303 | ext3_init_journal_params(sb, journal); | |
2304 | return journal; | |
2305 | out_journal: | |
2306 | journal_destroy(journal); | |
2307 | out_bdev: | |
2308 | ext3_blkdev_put(bdev); | |
2309 | return NULL; | |
2310 | } | |
2311 | ||
71b96257 JL |
2312 | static int ext3_load_journal(struct super_block *sb, |
2313 | struct ext3_super_block *es, | |
2314 | unsigned long journal_devnum) | |
1da177e4 LT |
2315 | { |
2316 | journal_t *journal; | |
eee194e7 | 2317 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
71b96257 | 2318 | dev_t journal_dev; |
1da177e4 LT |
2319 | int err = 0; |
2320 | int really_read_only; | |
2321 | ||
71b96257 JL |
2322 | if (journal_devnum && |
2323 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
4cf46b67 AF |
2324 | ext3_msg(sb, KERN_INFO, "external journal device major/minor " |
2325 | "numbers have changed"); | |
71b96257 JL |
2326 | journal_dev = new_decode_dev(journal_devnum); |
2327 | } else | |
2328 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2329 | ||
1da177e4 LT |
2330 | really_read_only = bdev_read_only(sb->s_bdev); |
2331 | ||
2332 | /* | |
2333 | * Are we loading a blank journal or performing recovery after a | |
2334 | * crash? For recovery, we need to check in advance whether we | |
2335 | * can get read-write access to the device. | |
2336 | */ | |
2337 | ||
2338 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) { | |
2339 | if (sb->s_flags & MS_RDONLY) { | |
4cf46b67 AF |
2340 | ext3_msg(sb, KERN_INFO, |
2341 | "recovery required on readonly filesystem"); | |
1da177e4 | 2342 | if (really_read_only) { |
4cf46b67 AF |
2343 | ext3_msg(sb, KERN_ERR, "error: write access " |
2344 | "unavailable, cannot proceed"); | |
1da177e4 LT |
2345 | return -EROFS; |
2346 | } | |
4cf46b67 AF |
2347 | ext3_msg(sb, KERN_INFO, |
2348 | "write access will be enabled during recovery"); | |
1da177e4 LT |
2349 | } |
2350 | } | |
2351 | ||
2352 | if (journal_inum && journal_dev) { | |
4cf46b67 AF |
2353 | ext3_msg(sb, KERN_ERR, "error: filesystem has both journal " |
2354 | "and inode journals"); | |
1da177e4 LT |
2355 | return -EINVAL; |
2356 | } | |
2357 | ||
2358 | if (journal_inum) { | |
2359 | if (!(journal = ext3_get_journal(sb, journal_inum))) | |
2360 | return -EINVAL; | |
2361 | } else { | |
2362 | if (!(journal = ext3_get_dev_journal(sb, journal_dev))) | |
2363 | return -EINVAL; | |
2364 | } | |
2365 | ||
0636c73e ES |
2366 | if (!(journal->j_flags & JFS_BARRIER)) |
2367 | printk(KERN_INFO "EXT3-fs: barriers not enabled\n"); | |
2368 | ||
1da177e4 LT |
2369 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
2370 | err = journal_update_format(journal); | |
2371 | if (err) { | |
4cf46b67 | 2372 | ext3_msg(sb, KERN_ERR, "error updating journal"); |
1da177e4 LT |
2373 | journal_destroy(journal); |
2374 | return err; | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) | |
2379 | err = journal_wipe(journal, !really_read_only); | |
2380 | if (!err) | |
2381 | err = journal_load(journal); | |
2382 | ||
2383 | if (err) { | |
4cf46b67 | 2384 | ext3_msg(sb, KERN_ERR, "error loading journal"); |
1da177e4 LT |
2385 | journal_destroy(journal); |
2386 | return err; | |
2387 | } | |
2388 | ||
2389 | EXT3_SB(sb)->s_journal = journal; | |
2390 | ext3_clear_journal_err(sb, es); | |
71b96257 | 2391 | |
31d710a7 | 2392 | if (!really_read_only && journal_devnum && |
71b96257 JL |
2393 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
2394 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
71b96257 JL |
2395 | |
2396 | /* Make sure we flush the recovery flag to disk. */ | |
2397 | ext3_commit_super(sb, es, 1); | |
2398 | } | |
2399 | ||
1da177e4 LT |
2400 | return 0; |
2401 | } | |
2402 | ||
4cf46b67 AF |
2403 | static int ext3_create_journal(struct super_block *sb, |
2404 | struct ext3_super_block *es, | |
eee194e7 | 2405 | unsigned int journal_inum) |
1da177e4 LT |
2406 | { |
2407 | journal_t *journal; | |
952d9de1 | 2408 | int err; |
1da177e4 LT |
2409 | |
2410 | if (sb->s_flags & MS_RDONLY) { | |
4cf46b67 AF |
2411 | ext3_msg(sb, KERN_ERR, |
2412 | "error: readonly filesystem when trying to " | |
2413 | "create journal"); | |
1da177e4 LT |
2414 | return -EROFS; |
2415 | } | |
2416 | ||
952d9de1 BP |
2417 | journal = ext3_get_journal(sb, journal_inum); |
2418 | if (!journal) | |
1da177e4 LT |
2419 | return -EINVAL; |
2420 | ||
4cf46b67 | 2421 | ext3_msg(sb, KERN_INFO, "creating new journal on inode %u", |
1da177e4 LT |
2422 | journal_inum); |
2423 | ||
952d9de1 BP |
2424 | err = journal_create(journal); |
2425 | if (err) { | |
4cf46b67 | 2426 | ext3_msg(sb, KERN_ERR, "error creating journal"); |
1da177e4 LT |
2427 | journal_destroy(journal); |
2428 | return -EIO; | |
2429 | } | |
2430 | ||
2431 | EXT3_SB(sb)->s_journal = journal; | |
2432 | ||
2433 | ext3_update_dynamic_rev(sb); | |
2434 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2435 | EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL); | |
2436 | ||
2437 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
1da177e4 LT |
2438 | |
2439 | /* Make sure we flush the recovery flag to disk. */ | |
2440 | ext3_commit_super(sb, es, 1); | |
2441 | ||
2442 | return 0; | |
2443 | } | |
2444 | ||
c4be0c1d TS |
2445 | static int ext3_commit_super(struct super_block *sb, |
2446 | struct ext3_super_block *es, | |
1da177e4 LT |
2447 | int sync) |
2448 | { | |
2449 | struct buffer_head *sbh = EXT3_SB(sb)->s_sbh; | |
c4be0c1d | 2450 | int error = 0; |
1da177e4 LT |
2451 | |
2452 | if (!sbh) | |
c4be0c1d | 2453 | return error; |
dff6825e DW |
2454 | |
2455 | if (buffer_write_io_error(sbh)) { | |
2456 | /* | |
2457 | * Oh, dear. A previous attempt to write the | |
2458 | * superblock failed. This could happen because the | |
2459 | * USB device was yanked out. Or it could happen to | |
2460 | * be a transient write error and maybe the block will | |
2461 | * be remapped. Nothing we can do but to retry the | |
2462 | * write and hope for the best. | |
2463 | */ | |
2464 | ext3_msg(sb, KERN_ERR, "previous I/O error to " | |
2465 | "superblock detected"); | |
2466 | clear_buffer_write_io_error(sbh); | |
2467 | set_buffer_uptodate(sbh); | |
2468 | } | |
96ec2e0a TT |
2469 | /* |
2470 | * If the file system is mounted read-only, don't update the | |
2471 | * superblock write time. This avoids updating the superblock | |
2472 | * write time when we are mounting the root file system | |
2473 | * read/only but we need to replay the journal; at that point, | |
2474 | * for people who are east of GMT and who make their clock | |
2475 | * tick in localtime for Windows bug-for-bug compatibility, | |
2476 | * the clock is set in the future, and this will cause e2fsck | |
2477 | * to complain and force a full file system check. | |
2478 | */ | |
2479 | if (!(sb->s_flags & MS_RDONLY)) | |
2480 | es->s_wtime = cpu_to_le32(get_seconds()); | |
1da177e4 LT |
2481 | es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb)); |
2482 | es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb)); | |
2483 | BUFFER_TRACE(sbh, "marking dirty"); | |
2484 | mark_buffer_dirty(sbh); | |
dff6825e | 2485 | if (sync) { |
c4be0c1d | 2486 | error = sync_dirty_buffer(sbh); |
dff6825e DW |
2487 | if (buffer_write_io_error(sbh)) { |
2488 | ext3_msg(sb, KERN_ERR, "I/O error while writing " | |
2489 | "superblock"); | |
2490 | clear_buffer_write_io_error(sbh); | |
2491 | set_buffer_uptodate(sbh); | |
2492 | } | |
2493 | } | |
c4be0c1d | 2494 | return error; |
1da177e4 LT |
2495 | } |
2496 | ||
2497 | ||
2498 | /* | |
2499 | * Have we just finished recovery? If so, and if we are mounting (or | |
2500 | * remounting) the filesystem readonly, then we will end up with a | |
2501 | * consistent fs on disk. Record that fact. | |
2502 | */ | |
2503 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
2504 | struct ext3_super_block * es) | |
2505 | { | |
2506 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
2507 | ||
2508 | journal_lock_updates(journal); | |
2d7c820e HK |
2509 | if (journal_flush(journal) < 0) |
2510 | goto out; | |
2511 | ||
1da177e4 LT |
2512 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) && |
2513 | sb->s_flags & MS_RDONLY) { | |
2514 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1da177e4 LT |
2515 | ext3_commit_super(sb, es, 1); |
2516 | } | |
2d7c820e HK |
2517 | |
2518 | out: | |
1da177e4 LT |
2519 | journal_unlock_updates(journal); |
2520 | } | |
2521 | ||
2522 | /* | |
2523 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2524 | * has recorded an error from a previous lifetime, move that error to the | |
2525 | * main filesystem now. | |
2526 | */ | |
4cf46b67 AF |
2527 | static void ext3_clear_journal_err(struct super_block *sb, |
2528 | struct ext3_super_block *es) | |
1da177e4 LT |
2529 | { |
2530 | journal_t *journal; | |
2531 | int j_errno; | |
2532 | const char *errstr; | |
2533 | ||
2534 | journal = EXT3_SB(sb)->s_journal; | |
2535 | ||
2536 | /* | |
2537 | * Now check for any error status which may have been recorded in the | |
2538 | * journal by a prior ext3_error() or ext3_abort() | |
2539 | */ | |
2540 | ||
2541 | j_errno = journal_errno(journal); | |
2542 | if (j_errno) { | |
2543 | char nbuf[16]; | |
2544 | ||
2545 | errstr = ext3_decode_error(sb, j_errno, nbuf); | |
e05b6b52 | 2546 | ext3_warning(sb, __func__, "Filesystem error recorded " |
1da177e4 | 2547 | "from previous mount: %s", errstr); |
e05b6b52 | 2548 | ext3_warning(sb, __func__, "Marking fs in need of " |
1da177e4 LT |
2549 | "filesystem check."); |
2550 | ||
2551 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
2552 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
2553 | ext3_commit_super (sb, es, 1); | |
2554 | ||
2555 | journal_clear_err(journal); | |
2556 | } | |
2557 | } | |
2558 | ||
2559 | /* | |
2560 | * Force the running and committing transactions to commit, | |
2561 | * and wait on the commit. | |
2562 | */ | |
2563 | int ext3_force_commit(struct super_block *sb) | |
2564 | { | |
2565 | journal_t *journal; | |
2566 | int ret; | |
2567 | ||
2568 | if (sb->s_flags & MS_RDONLY) | |
2569 | return 0; | |
2570 | ||
2571 | journal = EXT3_SB(sb)->s_journal; | |
1da177e4 LT |
2572 | ret = ext3_journal_force_commit(journal); |
2573 | return ret; | |
2574 | } | |
2575 | ||
1da177e4 LT |
2576 | static int ext3_sync_fs(struct super_block *sb, int wait) |
2577 | { | |
02ac597c | 2578 | tid_t target; |
c87591b7 | 2579 | |
785c4bcc | 2580 | trace_ext3_sync_fs(sb, wait); |
a1177825 JK |
2581 | /* |
2582 | * Writeback quota in non-journalled quota case - journalled quota has | |
2583 | * no dirty dquots | |
2584 | */ | |
2585 | dquot_writeback_dquots(sb, -1); | |
02ac597c JK |
2586 | if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { |
2587 | if (wait) | |
2588 | log_wait_commit(EXT3_SB(sb)->s_journal, target); | |
2589 | } | |
1da177e4 LT |
2590 | return 0; |
2591 | } | |
2592 | ||
2593 | /* | |
2594 | * LVM calls this function before a (read-only) snapshot is created. This | |
2595 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2596 | */ | |
c4be0c1d | 2597 | static int ext3_freeze(struct super_block *sb) |
1da177e4 | 2598 | { |
c4be0c1d TS |
2599 | int error = 0; |
2600 | journal_t *journal; | |
1da177e4 LT |
2601 | |
2602 | if (!(sb->s_flags & MS_RDONLY)) { | |
c4be0c1d | 2603 | journal = EXT3_SB(sb)->s_journal; |
1da177e4 LT |
2604 | |
2605 | /* Now we set up the journal barrier. */ | |
2606 | journal_lock_updates(journal); | |
2d7c820e HK |
2607 | |
2608 | /* | |
2609 | * We don't want to clear needs_recovery flag when we failed | |
2610 | * to flush the journal. | |
2611 | */ | |
c4be0c1d TS |
2612 | error = journal_flush(journal); |
2613 | if (error < 0) | |
2614 | goto out; | |
1da177e4 LT |
2615 | |
2616 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
2617 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
c4be0c1d TS |
2618 | error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); |
2619 | if (error) | |
2620 | goto out; | |
1da177e4 | 2621 | } |
c4be0c1d TS |
2622 | return 0; |
2623 | ||
2624 | out: | |
2625 | journal_unlock_updates(journal); | |
2626 | return error; | |
1da177e4 LT |
2627 | } |
2628 | ||
2629 | /* | |
2630 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2631 | * flag here, even though the filesystem is not technically dirty yet. | |
2632 | */ | |
c4be0c1d | 2633 | static int ext3_unfreeze(struct super_block *sb) |
1da177e4 LT |
2634 | { |
2635 | if (!(sb->s_flags & MS_RDONLY)) { | |
1da177e4 LT |
2636 | /* Reser the needs_recovery flag before the fs is unlocked. */ |
2637 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2638 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); | |
1da177e4 LT |
2639 | journal_unlock_updates(EXT3_SB(sb)->s_journal); |
2640 | } | |
c4be0c1d | 2641 | return 0; |
1da177e4 LT |
2642 | } |
2643 | ||
2644 | static int ext3_remount (struct super_block * sb, int * flags, char * data) | |
2645 | { | |
2646 | struct ext3_super_block * es; | |
2647 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 2648 | ext3_fsblk_t n_blocks_count = 0; |
08c6a96f JK |
2649 | unsigned long old_sb_flags; |
2650 | struct ext3_mount_options old_opts; | |
c79d967d | 2651 | int enable_quota = 0; |
08c6a96f JK |
2652 | int err; |
2653 | #ifdef CONFIG_QUOTA | |
2654 | int i; | |
2655 | #endif | |
2656 | ||
02b9984d TT |
2657 | sync_filesystem(sb); |
2658 | ||
08c6a96f JK |
2659 | /* Store the original options */ |
2660 | old_sb_flags = sb->s_flags; | |
2661 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2662 | old_opts.s_resuid = sbi->s_resuid; | |
2663 | old_opts.s_resgid = sbi->s_resgid; | |
2664 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2665 | #ifdef CONFIG_QUOTA | |
2666 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a93114e4 | 2667 | for (i = 0; i < EXT3_MAXQUOTAS; i++) |
f56426ae JK |
2668 | if (sbi->s_qf_names[i]) { |
2669 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
2670 | GFP_KERNEL); | |
2671 | if (!old_opts.s_qf_names[i]) { | |
2672 | int j; | |
2673 | ||
2674 | for (j = 0; j < i; j++) | |
2675 | kfree(old_opts.s_qf_names[j]); | |
2676 | return -ENOMEM; | |
2677 | } | |
2678 | } else | |
2679 | old_opts.s_qf_names[i] = NULL; | |
08c6a96f | 2680 | #endif |
1da177e4 LT |
2681 | |
2682 | /* | |
2683 | * Allow the "check" option to be passed as a remount option. | |
2684 | */ | |
71b96257 | 2685 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { |
08c6a96f JK |
2686 | err = -EINVAL; |
2687 | goto restore_opts; | |
2688 | } | |
1da177e4 | 2689 | |
e3c96435 | 2690 | if (test_opt(sb, ABORT)) |
e05b6b52 | 2691 | ext3_abort(sb, __func__, "Abort forced by user"); |
1da177e4 LT |
2692 | |
2693 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
e3c96435 | 2694 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
1da177e4 LT |
2695 | |
2696 | es = sbi->s_es; | |
2697 | ||
2698 | ext3_init_journal_params(sb, sbi->s_journal); | |
2699 | ||
2700 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
2701 | n_blocks_count > le32_to_cpu(es->s_blocks_count)) { | |
e3c96435 | 2702 | if (test_opt(sb, ABORT)) { |
08c6a96f JK |
2703 | err = -EROFS; |
2704 | goto restore_opts; | |
2705 | } | |
1da177e4 LT |
2706 | |
2707 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
2708 | err = dquot_suspend(sb, -1); |
2709 | if (err < 0) | |
c79d967d | 2710 | goto restore_opts; |
c79d967d | 2711 | |
1da177e4 LT |
2712 | /* |
2713 | * First of all, the unconditional stuff we have to do | |
2714 | * to disable replay of the journal when we next remount | |
2715 | */ | |
2716 | sb->s_flags |= MS_RDONLY; | |
2717 | ||
2718 | /* | |
2719 | * OK, test if we are remounting a valid rw partition | |
2720 | * readonly, and if so set the rdonly flag and then | |
2721 | * mark the partition as valid again. | |
2722 | */ | |
2723 | if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) && | |
2724 | (sbi->s_mount_state & EXT3_VALID_FS)) | |
2725 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
2726 | ||
2727 | ext3_mark_recovery_complete(sb, es); | |
2728 | } else { | |
2729 | __le32 ret; | |
2730 | if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb, | |
2731 | ~EXT3_FEATURE_RO_COMPAT_SUPP))) { | |
4cf46b67 AF |
2732 | ext3_msg(sb, KERN_WARNING, |
2733 | "warning: couldn't remount RDWR " | |
2734 | "because of unsupported optional " | |
2735 | "features (%x)", le32_to_cpu(ret)); | |
08c6a96f JK |
2736 | err = -EROFS; |
2737 | goto restore_opts; | |
1da177e4 | 2738 | } |
ea9a05a1 ES |
2739 | |
2740 | /* | |
2741 | * If we have an unprocessed orphan list hanging | |
2742 | * around from a previously readonly bdev mount, | |
1cde201d | 2743 | * require a full umount & mount for now. |
ea9a05a1 ES |
2744 | */ |
2745 | if (es->s_last_orphan) { | |
4cf46b67 | 2746 | ext3_msg(sb, KERN_WARNING, "warning: couldn't " |
ea9a05a1 ES |
2747 | "remount RDWR because of unprocessed " |
2748 | "orphan inode list. Please " | |
1cde201d | 2749 | "umount & mount instead."); |
ea9a05a1 ES |
2750 | err = -EINVAL; |
2751 | goto restore_opts; | |
2752 | } | |
2753 | ||
1da177e4 LT |
2754 | /* |
2755 | * Mounting a RDONLY partition read-write, so reread | |
2756 | * and store the current valid flag. (It may have | |
2757 | * been changed by e2fsck since we originally mounted | |
2758 | * the partition.) | |
2759 | */ | |
2760 | ext3_clear_journal_err(sb, es); | |
2761 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
a4e4de36 | 2762 | if ((err = ext3_group_extend(sb, es, n_blocks_count))) |
08c6a96f | 2763 | goto restore_opts; |
1da177e4 LT |
2764 | if (!ext3_setup_super (sb, es, 0)) |
2765 | sb->s_flags &= ~MS_RDONLY; | |
c79d967d | 2766 | enable_quota = 1; |
1da177e4 LT |
2767 | } |
2768 | } | |
08c6a96f JK |
2769 | #ifdef CONFIG_QUOTA |
2770 | /* Release old quota file names */ | |
a93114e4 | 2771 | for (i = 0; i < EXT3_MAXQUOTAS; i++) |
f56426ae | 2772 | kfree(old_opts.s_qf_names[i]); |
08c6a96f | 2773 | #endif |
c79d967d | 2774 | if (enable_quota) |
0f0dd62f | 2775 | dquot_resume(sb, -1); |
1da177e4 | 2776 | return 0; |
08c6a96f JK |
2777 | restore_opts: |
2778 | sb->s_flags = old_sb_flags; | |
2779 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
2780 | sbi->s_resuid = old_opts.s_resuid; | |
2781 | sbi->s_resgid = old_opts.s_resgid; | |
2782 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
2783 | #ifdef CONFIG_QUOTA | |
2784 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a93114e4 | 2785 | for (i = 0; i < EXT3_MAXQUOTAS; i++) { |
f56426ae | 2786 | kfree(sbi->s_qf_names[i]); |
08c6a96f JK |
2787 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
2788 | } | |
2789 | #endif | |
2790 | return err; | |
1da177e4 LT |
2791 | } |
2792 | ||
726c3342 | 2793 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf) |
1da177e4 | 2794 | { |
726c3342 | 2795 | struct super_block *sb = dentry->d_sb; |
09fe316a AT |
2796 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
2797 | struct ext3_super_block *es = sbi->s_es; | |
50ee0a32 | 2798 | u64 fsid; |
1da177e4 | 2799 | |
a71ce8c6 BP |
2800 | if (test_opt(sb, MINIX_DF)) { |
2801 | sbi->s_overhead_last = 0; | |
2802 | } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { | |
2803 | unsigned long ngroups = sbi->s_groups_count, i; | |
2804 | ext3_fsblk_t overhead = 0; | |
1da177e4 LT |
2805 | smp_rmb(); |
2806 | ||
2807 | /* | |
a71ce8c6 BP |
2808 | * Compute the overhead (FS structures). This is constant |
2809 | * for a given filesystem unless the number of block groups | |
2810 | * changes so we cache the previous value until it does. | |
1da177e4 LT |
2811 | */ |
2812 | ||
2813 | /* | |
2814 | * All of the blocks before first_data_block are | |
2815 | * overhead | |
2816 | */ | |
2817 | overhead = le32_to_cpu(es->s_first_data_block); | |
2818 | ||
2819 | /* | |
2820 | * Add the overhead attributed to the superblock and | |
2821 | * block group descriptors. If the sparse superblocks | |
2822 | * feature is turned on, then not all groups have this. | |
2823 | */ | |
2824 | for (i = 0; i < ngroups; i++) { | |
2825 | overhead += ext3_bg_has_super(sb, i) + | |
2826 | ext3_bg_num_gdb(sb, i); | |
2827 | cond_resched(); | |
2828 | } | |
2829 | ||
2830 | /* | |
2831 | * Every block group has an inode bitmap, a block | |
2832 | * bitmap, and an inode table. | |
2833 | */ | |
a71ce8c6 | 2834 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
2046fd18 | 2835 | |
e6d8fb34 CTC |
2836 | /* Add the internal journal blocks as well */ |
2837 | if (sbi->s_journal && !sbi->journal_bdev) | |
2838 | overhead += sbi->s_journal->j_maxlen; | |
2046fd18 | 2839 | |
a71ce8c6 BP |
2840 | sbi->s_overhead_last = overhead; |
2841 | smp_wmb(); | |
2842 | sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); | |
1da177e4 LT |
2843 | } |
2844 | ||
2845 | buf->f_type = EXT3_SUPER_MAGIC; | |
2846 | buf->f_bsize = sb->s_blocksize; | |
a71ce8c6 | 2847 | buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last; |
52d9f3b4 | 2848 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); |
1da177e4 LT |
2849 | buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); |
2850 | if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) | |
2851 | buf->f_bavail = 0; | |
2852 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 2853 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
1da177e4 | 2854 | buf->f_namelen = EXT3_NAME_LEN; |
50ee0a32 PE |
2855 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
2856 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
2857 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
2858 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
1da177e4 LT |
2859 | return 0; |
2860 | } | |
2861 | ||
2862 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
2863 | * is locked for write. Otherwise the are possible deadlocks: | |
2864 | * Process 1 Process 2 | |
2865 | * ext3_create() quota_sync() | |
2866 | * journal_start() write_dquot() | |
871a2931 | 2867 | * dquot_initialize() down(dqio_mutex) |
d3be915f | 2868 | * down(dqio_mutex) journal_start() |
1da177e4 LT |
2869 | * |
2870 | */ | |
2871 | ||
2872 | #ifdef CONFIG_QUOTA | |
2873 | ||
2874 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
2875 | { | |
4c376dca | 2876 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
1da177e4 LT |
2877 | } |
2878 | ||
1da177e4 LT |
2879 | static int ext3_write_dquot(struct dquot *dquot) |
2880 | { | |
2881 | int ret, err; | |
2882 | handle_t *handle; | |
2883 | struct inode *inode; | |
2884 | ||
2885 | inode = dquot_to_inode(dquot); | |
2886 | handle = ext3_journal_start(inode, | |
1f54587b | 2887 | EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2888 | if (IS_ERR(handle)) |
2889 | return PTR_ERR(handle); | |
2890 | ret = dquot_commit(dquot); | |
2891 | err = ext3_journal_stop(handle); | |
2892 | if (!ret) | |
2893 | ret = err; | |
2894 | return ret; | |
2895 | } | |
2896 | ||
2897 | static int ext3_acquire_dquot(struct dquot *dquot) | |
2898 | { | |
2899 | int ret, err; | |
2900 | handle_t *handle; | |
2901 | ||
2902 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2903 | EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2904 | if (IS_ERR(handle)) |
2905 | return PTR_ERR(handle); | |
2906 | ret = dquot_acquire(dquot); | |
2907 | err = ext3_journal_stop(handle); | |
2908 | if (!ret) | |
2909 | ret = err; | |
2910 | return ret; | |
2911 | } | |
2912 | ||
2913 | static int ext3_release_dquot(struct dquot *dquot) | |
2914 | { | |
2915 | int ret, err; | |
2916 | handle_t *handle; | |
2917 | ||
2918 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2919 | EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
2920 | if (IS_ERR(handle)) { |
2921 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2922 | dquot_release(dquot); | |
1da177e4 | 2923 | return PTR_ERR(handle); |
9c3013e9 | 2924 | } |
1da177e4 LT |
2925 | ret = dquot_release(dquot); |
2926 | err = ext3_journal_stop(handle); | |
2927 | if (!ret) | |
2928 | ret = err; | |
2929 | return ret; | |
2930 | } | |
2931 | ||
2932 | static int ext3_mark_dquot_dirty(struct dquot *dquot) | |
2933 | { | |
99aeaf63 | 2934 | /* Are we journaling quotas? */ |
1da177e4 LT |
2935 | if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2936 | EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2937 | dquot_mark_dquot_dirty(dquot); | |
2938 | return ext3_write_dquot(dquot); | |
2939 | } else { | |
2940 | return dquot_mark_dquot_dirty(dquot); | |
2941 | } | |
2942 | } | |
2943 | ||
2944 | static int ext3_write_info(struct super_block *sb, int type) | |
2945 | { | |
2946 | int ret, err; | |
2947 | handle_t *handle; | |
2948 | ||
2949 | /* Data block + inode block */ | |
2950 | handle = ext3_journal_start(sb->s_root->d_inode, 2); | |
2951 | if (IS_ERR(handle)) | |
2952 | return PTR_ERR(handle); | |
2953 | ret = dquot_commit_info(sb, type); | |
2954 | err = ext3_journal_stop(handle); | |
2955 | if (!ret) | |
2956 | ret = err; | |
2957 | return ret; | |
2958 | } | |
2959 | ||
2960 | /* | |
2961 | * Turn on quotas during mount time - we need to find | |
2962 | * the quota file and such... | |
2963 | */ | |
2964 | static int ext3_quota_on_mount(struct super_block *sb, int type) | |
2965 | { | |
287a8095 CH |
2966 | return dquot_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type], |
2967 | EXT3_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2968 | } |
2969 | ||
2970 | /* | |
2971 | * Standard function to be called on quota_on | |
2972 | */ | |
2973 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, | |
f00c9e44 | 2974 | struct path *path) |
1da177e4 LT |
2975 | { |
2976 | int err; | |
1da177e4 | 2977 | |
1f54587b JK |
2978 | if (!test_opt(sb, QUOTA)) |
2979 | return -EINVAL; | |
9cfe7b90 | 2980 | |
1da177e4 | 2981 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 2982 | if (path->dentry->d_sb != sb) |
1da177e4 | 2983 | return -EXDEV; |
9cfe7b90 JK |
2984 | /* Journaling quota? */ |
2985 | if (EXT3_SB(sb)->s_qf_names[type]) { | |
2986 | /* Quotafile not of fs root? */ | |
f00c9e44 | 2987 | if (path->dentry->d_parent != sb->s_root) |
4cf46b67 AF |
2988 | ext3_msg(sb, KERN_WARNING, |
2989 | "warning: Quota file not on filesystem root. " | |
2990 | "Journaled quota will not work."); | |
9cfe7b90 JK |
2991 | } |
2992 | ||
2993 | /* | |
2994 | * When we journal data on quota file, we have to flush journal to see | |
2995 | * all updates to the file when we bypass pagecache... | |
2996 | */ | |
f00c9e44 | 2997 | if (ext3_should_journal_data(path->dentry->d_inode)) { |
9cfe7b90 JK |
2998 | /* |
2999 | * We don't need to lock updates but journal_flush() could | |
3000 | * otherwise be livelocked... | |
3001 | */ | |
3002 | journal_lock_updates(EXT3_SB(sb)->s_journal); | |
2d7c820e | 3003 | err = journal_flush(EXT3_SB(sb)->s_journal); |
9cfe7b90 | 3004 | journal_unlock_updates(EXT3_SB(sb)->s_journal); |
f00c9e44 | 3005 | if (err) |
2d7c820e | 3006 | return err; |
9cfe7b90 JK |
3007 | } |
3008 | ||
f00c9e44 | 3009 | return dquot_quota_on(sb, type, format_id, path); |
1da177e4 LT |
3010 | } |
3011 | ||
3012 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3013 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 3014 | * itself serializes the operations (and no one else should touch the files) |
1da177e4 LT |
3015 | * we don't have to be afraid of races */ |
3016 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
3017 | size_t len, loff_t off) | |
3018 | { | |
3019 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
3020 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
3021 | int err = 0; | |
3022 | int offset = off & (sb->s_blocksize - 1); | |
3023 | int tocopy; | |
3024 | size_t toread; | |
3025 | struct buffer_head *bh; | |
3026 | loff_t i_size = i_size_read(inode); | |
3027 | ||
3028 | if (off > i_size) | |
3029 | return 0; | |
3030 | if (off+len > i_size) | |
3031 | len = i_size-off; | |
3032 | toread = len; | |
3033 | while (toread > 0) { | |
3034 | tocopy = sb->s_blocksize - offset < toread ? | |
3035 | sb->s_blocksize - offset : toread; | |
3036 | bh = ext3_bread(NULL, inode, blk, 0, &err); | |
3037 | if (err) | |
3038 | return err; | |
3039 | if (!bh) /* A hole? */ | |
3040 | memset(data, 0, tocopy); | |
3041 | else | |
3042 | memcpy(data, bh->b_data+offset, tocopy); | |
3043 | brelse(bh); | |
3044 | offset = 0; | |
3045 | toread -= tocopy; | |
3046 | data += tocopy; | |
3047 | blk++; | |
3048 | } | |
3049 | return len; | |
3050 | } | |
3051 | ||
3052 | /* Write to quotafile (we know the transaction is already started and has | |
3053 | * enough credits) */ | |
3054 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
3055 | const char *data, size_t len, loff_t off) | |
3056 | { | |
3057 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
3058 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
3059 | int err = 0; | |
3060 | int offset = off & (sb->s_blocksize - 1); | |
1da177e4 | 3061 | int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL; |
1da177e4 LT |
3062 | struct buffer_head *bh; |
3063 | handle_t *handle = journal_current_handle(); | |
3064 | ||
9c3013e9 | 3065 | if (!handle) { |
4cf46b67 AF |
3066 | ext3_msg(sb, KERN_WARNING, |
3067 | "warning: quota write (off=%llu, len=%llu)" | |
3068 | " cancelled because transaction is not started.", | |
9c3013e9 JK |
3069 | (unsigned long long)off, (unsigned long long)len); |
3070 | return -EIO; | |
3071 | } | |
e5472147 DM |
3072 | |
3073 | /* | |
3074 | * Since we account only one data block in transaction credits, | |
3075 | * then it is impossible to cross a block boundary. | |
3076 | */ | |
3077 | if (sb->s_blocksize - offset < len) { | |
3078 | ext3_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
3079 | " cancelled because not block aligned", | |
3080 | (unsigned long long)off, (unsigned long long)len); | |
3081 | return -EIO; | |
3082 | } | |
e5472147 DM |
3083 | bh = ext3_bread(handle, inode, blk, 1, &err); |
3084 | if (!bh) | |
3085 | goto out; | |
3086 | if (journal_quota) { | |
3087 | err = ext3_journal_get_write_access(handle, bh); | |
3088 | if (err) { | |
3089 | brelse(bh); | |
1da177e4 | 3090 | goto out; |
1da177e4 | 3091 | } |
1da177e4 | 3092 | } |
e5472147 DM |
3093 | lock_buffer(bh); |
3094 | memcpy(bh->b_data+offset, data, len); | |
3095 | flush_dcache_page(bh->b_page); | |
3096 | unlock_buffer(bh); | |
3097 | if (journal_quota) | |
3098 | err = ext3_journal_dirty_metadata(handle, bh); | |
3099 | else { | |
3100 | /* Always do at least ordered writes for quotas */ | |
3101 | err = ext3_journal_dirty_data(handle, bh); | |
3102 | mark_buffer_dirty(bh); | |
3103 | } | |
3104 | brelse(bh); | |
1da177e4 | 3105 | out: |
905c3937 | 3106 | if (err) |
1da177e4 | 3107 | return err; |
e5472147 DM |
3108 | if (inode->i_size < off + len) { |
3109 | i_size_write(inode, off + len); | |
1da177e4 LT |
3110 | EXT3_I(inode)->i_disksize = inode->i_size; |
3111 | } | |
3112 | inode->i_version++; | |
3113 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
3114 | ext3_mark_inode_dirty(handle, inode); | |
e5472147 | 3115 | return len; |
1da177e4 LT |
3116 | } |
3117 | ||
3118 | #endif | |
3119 | ||
152a0836 AV |
3120 | static struct dentry *ext3_mount(struct file_system_type *fs_type, |
3121 | int flags, const char *dev_name, void *data) | |
1da177e4 | 3122 | { |
152a0836 | 3123 | return mount_bdev(fs_type, flags, dev_name, data, ext3_fill_super); |
1da177e4 LT |
3124 | } |
3125 | ||
3126 | static struct file_system_type ext3_fs_type = { | |
3127 | .owner = THIS_MODULE, | |
3128 | .name = "ext3", | |
152a0836 | 3129 | .mount = ext3_mount, |
1da177e4 LT |
3130 | .kill_sb = kill_block_super, |
3131 | .fs_flags = FS_REQUIRES_DEV, | |
3132 | }; | |
7f78e035 | 3133 | MODULE_ALIAS_FS("ext3"); |
1da177e4 LT |
3134 | |
3135 | static int __init init_ext3_fs(void) | |
3136 | { | |
3137 | int err = init_ext3_xattr(); | |
3138 | if (err) | |
3139 | return err; | |
3140 | err = init_inodecache(); | |
3141 | if (err) | |
3142 | goto out1; | |
3143 | err = register_filesystem(&ext3_fs_type); | |
3144 | if (err) | |
3145 | goto out; | |
3146 | return 0; | |
3147 | out: | |
3148 | destroy_inodecache(); | |
3149 | out1: | |
e9ad5620 | 3150 | exit_ext3_xattr(); |
1da177e4 LT |
3151 | return err; |
3152 | } | |
3153 | ||
3154 | static void __exit exit_ext3_fs(void) | |
3155 | { | |
3156 | unregister_filesystem(&ext3_fs_type); | |
3157 | destroy_inodecache(); | |
3158 | exit_ext3_xattr(); | |
3159 | } | |
3160 | ||
3161 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
3162 | MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions"); | |
3163 | MODULE_LICENSE("GPL"); | |
3164 | module_init(init_ext3_fs) | |
3165 | module_exit(exit_ext3_fs) |