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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/ext3/super.c | |
3 | * | |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
23 | #include <linux/jbd.h> | |
24 | #include <linux/ext3_fs.h> | |
25 | #include <linux/ext3_jbd.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/blkdev.h> | |
29 | #include <linux/parser.h> | |
1da177e4 | 30 | #include <linux/buffer_head.h> |
a5694255 | 31 | #include <linux/exportfs.h> |
1da177e4 LT |
32 | #include <linux/vfs.h> |
33 | #include <linux/random.h> | |
34 | #include <linux/mount.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/quotaops.h> | |
8fc2751b | 37 | #include <linux/seq_file.h> |
3fc74269 | 38 | #include <linux/log2.h> |
381be254 | 39 | |
1da177e4 | 40 | #include <asm/uaccess.h> |
381be254 | 41 | |
1da177e4 LT |
42 | #include "xattr.h" |
43 | #include "acl.h" | |
381be254 | 44 | #include "namei.h" |
1da177e4 | 45 | |
bbae8bcc LT |
46 | #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED |
47 | #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA | |
48 | #else | |
49 | #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA | |
50 | #endif | |
51 | ||
71b96257 JL |
52 | static int ext3_load_journal(struct super_block *, struct ext3_super_block *, |
53 | unsigned long journal_devnum); | |
1da177e4 | 54 | static int ext3_create_journal(struct super_block *, struct ext3_super_block *, |
eee194e7 | 55 | unsigned int); |
c4be0c1d TS |
56 | static int ext3_commit_super(struct super_block *sb, |
57 | struct ext3_super_block *es, | |
1da177e4 LT |
58 | int sync); |
59 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
60 | struct ext3_super_block * es); | |
61 | static void ext3_clear_journal_err(struct super_block * sb, | |
62 | struct ext3_super_block * es); | |
63 | static int ext3_sync_fs(struct super_block *sb, int wait); | |
64 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
65 | char nbuf[16]); | |
66 | static int ext3_remount (struct super_block * sb, int * flags, char * data); | |
726c3342 | 67 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf); |
c4be0c1d | 68 | static int ext3_unfreeze(struct super_block *sb); |
c4be0c1d | 69 | static int ext3_freeze(struct super_block *sb); |
1da177e4 | 70 | |
ae6ddcc5 | 71 | /* |
1da177e4 LT |
72 | * Wrappers for journal_start/end. |
73 | * | |
74 | * The only special thing we need to do here is to make sure that all | |
75 | * journal_end calls result in the superblock being marked dirty, so | |
76 | * that sync() will call the filesystem's write_super callback if | |
ae6ddcc5 | 77 | * appropriate. |
1da177e4 LT |
78 | */ |
79 | handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks) | |
80 | { | |
81 | journal_t *journal; | |
82 | ||
83 | if (sb->s_flags & MS_RDONLY) | |
84 | return ERR_PTR(-EROFS); | |
85 | ||
86 | /* Special case here: if the journal has aborted behind our | |
87 | * backs (eg. EIO in the commit thread), then we still need to | |
88 | * take the FS itself readonly cleanly. */ | |
89 | journal = EXT3_SB(sb)->s_journal; | |
90 | if (is_journal_aborted(journal)) { | |
e05b6b52 | 91 | ext3_abort(sb, __func__, |
1da177e4 LT |
92 | "Detected aborted journal"); |
93 | return ERR_PTR(-EROFS); | |
94 | } | |
95 | ||
96 | return journal_start(journal, nblocks); | |
97 | } | |
98 | ||
ae6ddcc5 | 99 | /* |
1da177e4 LT |
100 | * The only special thing we need to do here is to make sure that all |
101 | * journal_stop calls result in the superblock being marked dirty, so | |
102 | * that sync() will call the filesystem's write_super callback if | |
ae6ddcc5 | 103 | * appropriate. |
1da177e4 LT |
104 | */ |
105 | int __ext3_journal_stop(const char *where, handle_t *handle) | |
106 | { | |
107 | struct super_block *sb; | |
108 | int err; | |
109 | int rc; | |
110 | ||
111 | sb = handle->h_transaction->t_journal->j_private; | |
112 | err = handle->h_err; | |
113 | rc = journal_stop(handle); | |
114 | ||
115 | if (!err) | |
116 | err = rc; | |
117 | if (err) | |
118 | __ext3_std_error(sb, where, err); | |
119 | return err; | |
120 | } | |
121 | ||
122 | void ext3_journal_abort_handle(const char *caller, const char *err_fn, | |
123 | struct buffer_head *bh, handle_t *handle, int err) | |
124 | { | |
125 | char nbuf[16]; | |
126 | const char *errstr = ext3_decode_error(NULL, err, nbuf); | |
127 | ||
128 | if (bh) | |
129 | BUFFER_TRACE(bh, "abort"); | |
130 | ||
131 | if (!handle->h_err) | |
132 | handle->h_err = err; | |
133 | ||
134 | if (is_handle_aborted(handle)) | |
135 | return; | |
136 | ||
4cf46b67 AF |
137 | printk(KERN_ERR "EXT3-fs: %s: aborting transaction: %s in %s\n", |
138 | caller, errstr, err_fn); | |
1da177e4 LT |
139 | |
140 | journal_abort_handle(handle); | |
141 | } | |
142 | ||
4cf46b67 AF |
143 | void ext3_msg(struct super_block *sb, const char *prefix, |
144 | const char *fmt, ...) | |
145 | { | |
146 | va_list args; | |
147 | ||
148 | va_start(args, fmt); | |
149 | printk("%sEXT3-fs (%s): ", prefix, sb->s_id); | |
150 | vprintk(fmt, args); | |
151 | printk("\n"); | |
152 | va_end(args); | |
153 | } | |
154 | ||
1da177e4 LT |
155 | /* Deal with the reporting of failure conditions on a filesystem such as |
156 | * inconsistencies detected or read IO failures. | |
157 | * | |
158 | * On ext2, we can store the error state of the filesystem in the | |
159 | * superblock. That is not possible on ext3, because we may have other | |
160 | * write ordering constraints on the superblock which prevent us from | |
161 | * writing it out straight away; and given that the journal is about to | |
162 | * be aborted, we can't rely on the current, or future, transactions to | |
163 | * write out the superblock safely. | |
164 | * | |
165 | * We'll just use the journal_abort() error code to record an error in | |
d6b198bc | 166 | * the journal instead. On recovery, the journal will complain about |
1da177e4 LT |
167 | * that error until we've noted it down and cleared it. |
168 | */ | |
169 | ||
170 | static void ext3_handle_error(struct super_block *sb) | |
171 | { | |
172 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
173 | ||
174 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
175 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
176 | ||
177 | if (sb->s_flags & MS_RDONLY) | |
178 | return; | |
179 | ||
7543fc7b | 180 | if (!test_opt (sb, ERRORS_CONT)) { |
1da177e4 LT |
181 | journal_t *journal = EXT3_SB(sb)->s_journal; |
182 | ||
e3c96435 | 183 | set_opt(EXT3_SB(sb)->s_mount_opt, ABORT); |
1da177e4 LT |
184 | if (journal) |
185 | journal_abort(journal, -EIO); | |
186 | } | |
7543fc7b | 187 | if (test_opt (sb, ERRORS_RO)) { |
4cf46b67 AF |
188 | ext3_msg(sb, KERN_CRIT, |
189 | "error: remounting filesystem read-only"); | |
7543fc7b VA |
190 | sb->s_flags |= MS_RDONLY; |
191 | } | |
192 | ext3_commit_super(sb, es, 1); | |
1da177e4 | 193 | if (test_opt(sb, ERRORS_PANIC)) |
4cf46b67 | 194 | panic("EXT3-fs (%s): panic forced after error\n", |
1da177e4 | 195 | sb->s_id); |
1da177e4 LT |
196 | } |
197 | ||
198 | void ext3_error (struct super_block * sb, const char * function, | |
199 | const char * fmt, ...) | |
200 | { | |
201 | va_list args; | |
202 | ||
203 | va_start(args, fmt); | |
204 | printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); | |
205 | vprintk(fmt, args); | |
206 | printk("\n"); | |
207 | va_end(args); | |
208 | ||
209 | ext3_handle_error(sb); | |
210 | } | |
211 | ||
212 | static const char *ext3_decode_error(struct super_block * sb, int errno, | |
213 | char nbuf[16]) | |
214 | { | |
215 | char *errstr = NULL; | |
216 | ||
217 | switch (errno) { | |
218 | case -EIO: | |
219 | errstr = "IO failure"; | |
220 | break; | |
221 | case -ENOMEM: | |
222 | errstr = "Out of memory"; | |
223 | break; | |
224 | case -EROFS: | |
225 | if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT) | |
226 | errstr = "Journal has aborted"; | |
227 | else | |
228 | errstr = "Readonly filesystem"; | |
229 | break; | |
230 | default: | |
231 | /* If the caller passed in an extra buffer for unknown | |
232 | * errors, textualise them now. Else we just return | |
233 | * NULL. */ | |
234 | if (nbuf) { | |
235 | /* Check for truncated error codes... */ | |
236 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
237 | errstr = nbuf; | |
238 | } | |
239 | break; | |
240 | } | |
241 | ||
242 | return errstr; | |
243 | } | |
244 | ||
245 | /* __ext3_std_error decodes expected errors from journaling functions | |
246 | * automatically and invokes the appropriate error response. */ | |
247 | ||
248 | void __ext3_std_error (struct super_block * sb, const char * function, | |
249 | int errno) | |
250 | { | |
251 | char nbuf[16]; | |
30121624 | 252 | const char *errstr; |
1da177e4 | 253 | |
30121624 ST |
254 | /* Special case: if the error is EROFS, and we're not already |
255 | * inside a transaction, then there's really no point in logging | |
256 | * an error. */ | |
257 | if (errno == -EROFS && journal_current_handle() == NULL && | |
258 | (sb->s_flags & MS_RDONLY)) | |
259 | return; | |
260 | ||
261 | errstr = ext3_decode_error(sb, errno, nbuf); | |
4cf46b67 | 262 | ext3_msg(sb, KERN_CRIT, "error in %s: %s", function, errstr); |
1da177e4 LT |
263 | |
264 | ext3_handle_error(sb); | |
265 | } | |
266 | ||
267 | /* | |
268 | * ext3_abort is a much stronger failure handler than ext3_error. The | |
269 | * abort function may be used to deal with unrecoverable failures such | |
270 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
271 | * | |
272 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
273 | * unless the error response on the fs has been set to panic in which | |
274 | * case we take the easy way out and panic immediately. | |
275 | */ | |
276 | ||
277 | void ext3_abort (struct super_block * sb, const char * function, | |
278 | const char * fmt, ...) | |
279 | { | |
280 | va_list args; | |
281 | ||
1da177e4 | 282 | va_start(args, fmt); |
4cf46b67 | 283 | printk(KERN_CRIT "EXT3-fs (%s): error: %s: ", sb->s_id, function); |
1da177e4 LT |
284 | vprintk(fmt, args); |
285 | printk("\n"); | |
286 | va_end(args); | |
287 | ||
288 | if (test_opt(sb, ERRORS_PANIC)) | |
4cf46b67 | 289 | panic("EXT3-fs: panic from previous error\n"); |
1da177e4 LT |
290 | |
291 | if (sb->s_flags & MS_RDONLY) | |
292 | return; | |
293 | ||
4cf46b67 AF |
294 | ext3_msg(sb, KERN_CRIT, |
295 | "error: remounting filesystem read-only"); | |
1da177e4 LT |
296 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; |
297 | sb->s_flags |= MS_RDONLY; | |
e3c96435 | 298 | set_opt(EXT3_SB(sb)->s_mount_opt, ABORT); |
44d6f787 HK |
299 | if (EXT3_SB(sb)->s_journal) |
300 | journal_abort(EXT3_SB(sb)->s_journal, -EIO); | |
1da177e4 LT |
301 | } |
302 | ||
303 | void ext3_warning (struct super_block * sb, const char * function, | |
304 | const char * fmt, ...) | |
305 | { | |
306 | va_list args; | |
307 | ||
308 | va_start(args, fmt); | |
4cf46b67 | 309 | printk(KERN_WARNING "EXT3-fs (%s): warning: %s: ", |
1da177e4 LT |
310 | sb->s_id, function); |
311 | vprintk(fmt, args); | |
312 | printk("\n"); | |
313 | va_end(args); | |
314 | } | |
315 | ||
316 | void ext3_update_dynamic_rev(struct super_block *sb) | |
317 | { | |
318 | struct ext3_super_block *es = EXT3_SB(sb)->s_es; | |
319 | ||
320 | if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV) | |
321 | return; | |
322 | ||
4cf46b67 AF |
323 | ext3_msg(sb, KERN_WARNING, |
324 | "warning: updating to rev %d because of " | |
325 | "new feature flag, running e2fsck is recommended", | |
326 | EXT3_DYNAMIC_REV); | |
1da177e4 LT |
327 | |
328 | es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO); | |
329 | es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE); | |
330 | es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV); | |
331 | /* leave es->s_feature_*compat flags alone */ | |
332 | /* es->s_uuid will be set by e2fsck if empty */ | |
333 | ||
334 | /* | |
335 | * The rest of the superblock fields should be zero, and if not it | |
336 | * means they are likely already in use, so leave them alone. We | |
337 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
338 | */ | |
339 | } | |
340 | ||
341 | /* | |
342 | * Open the external journal device | |
343 | */ | |
4cf46b67 | 344 | static struct block_device *ext3_blkdev_get(dev_t dev, struct super_block *sb) |
1da177e4 LT |
345 | { |
346 | struct block_device *bdev; | |
347 | char b[BDEVNAME_SIZE]; | |
348 | ||
349 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
350 | if (IS_ERR(bdev)) | |
351 | goto fail; | |
352 | return bdev; | |
353 | ||
354 | fail: | |
4cf46b67 AF |
355 | ext3_msg(sb, "error: failed to open journal device %s: %ld", |
356 | __bdevname(dev, b), PTR_ERR(bdev)); | |
357 | ||
1da177e4 LT |
358 | return NULL; |
359 | } | |
360 | ||
361 | /* | |
362 | * Release the journal device | |
363 | */ | |
364 | static int ext3_blkdev_put(struct block_device *bdev) | |
365 | { | |
366 | bd_release(bdev); | |
9a1c3542 | 367 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
1da177e4 LT |
368 | } |
369 | ||
370 | static int ext3_blkdev_remove(struct ext3_sb_info *sbi) | |
371 | { | |
372 | struct block_device *bdev; | |
373 | int ret = -ENODEV; | |
374 | ||
375 | bdev = sbi->journal_bdev; | |
376 | if (bdev) { | |
377 | ret = ext3_blkdev_put(bdev); | |
378 | sbi->journal_bdev = NULL; | |
379 | } | |
380 | return ret; | |
381 | } | |
382 | ||
383 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
384 | { | |
385 | return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode; | |
386 | } | |
387 | ||
388 | static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi) | |
389 | { | |
390 | struct list_head *l; | |
391 | ||
4cf46b67 | 392 | ext3_msg(sb, KERN_ERR, "error: sb orphan head is %d", |
1da177e4 LT |
393 | le32_to_cpu(sbi->s_es->s_last_orphan)); |
394 | ||
4cf46b67 | 395 | ext3_msg(sb, KERN_ERR, "sb_info orphan list:"); |
1da177e4 LT |
396 | list_for_each(l, &sbi->s_orphan) { |
397 | struct inode *inode = orphan_list_entry(l); | |
4cf46b67 | 398 | ext3_msg(sb, KERN_ERR, " " |
eee194e7 | 399 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", |
1da177e4 | 400 | inode->i_sb->s_id, inode->i_ino, inode, |
ae6ddcc5 | 401 | inode->i_mode, inode->i_nlink, |
1da177e4 LT |
402 | NEXT_ORPHAN(inode)); |
403 | } | |
404 | } | |
405 | ||
406 | static void ext3_put_super (struct super_block * sb) | |
407 | { | |
408 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
409 | struct ext3_super_block *es = sbi->s_es; | |
44d6f787 | 410 | int i, err; |
1da177e4 | 411 | |
e0ccfd95 | 412 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
1da177e4 | 413 | ext3_xattr_put_super(sb); |
44d6f787 HK |
414 | err = journal_destroy(sbi->s_journal); |
415 | sbi->s_journal = NULL; | |
416 | if (err < 0) | |
2d7c820e | 417 | ext3_abort(sb, __func__, "Couldn't clean up the journal"); |
44d6f787 | 418 | |
1da177e4 LT |
419 | if (!(sb->s_flags & MS_RDONLY)) { |
420 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
421 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
422 | BUFFER_TRACE(sbi->s_sbh, "marking dirty"); | |
423 | mark_buffer_dirty(sbi->s_sbh); | |
424 | ext3_commit_super(sb, es, 1); | |
425 | } | |
426 | ||
427 | for (i = 0; i < sbi->s_gdb_count; i++) | |
428 | brelse(sbi->s_group_desc[i]); | |
429 | kfree(sbi->s_group_desc); | |
430 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
431 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
432 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
433 | brelse(sbi->s_sbh); | |
434 | #ifdef CONFIG_QUOTA | |
435 | for (i = 0; i < MAXQUOTAS; i++) | |
436 | kfree(sbi->s_qf_names[i]); | |
437 | #endif | |
438 | ||
439 | /* Debugging code just in case the in-memory inode orphan list | |
440 | * isn't empty. The on-disk one can be non-empty if we've | |
441 | * detected an error and taken the fs readonly, but the | |
442 | * in-memory list had better be clean by this point. */ | |
443 | if (!list_empty(&sbi->s_orphan)) | |
444 | dump_orphan_list(sb, sbi); | |
445 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
446 | ||
f98393a6 | 447 | invalidate_bdev(sb->s_bdev); |
1da177e4 LT |
448 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
449 | /* | |
450 | * Invalidate the journal device's buffers. We don't want them | |
451 | * floating about in memory - the physical journal device may | |
452 | * hotswapped, and it breaks the `ro-after' testing code. | |
453 | */ | |
454 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 455 | invalidate_bdev(sbi->journal_bdev); |
1da177e4 LT |
456 | ext3_blkdev_remove(sbi); |
457 | } | |
458 | sb->s_fs_info = NULL; | |
5df096d6 | 459 | kfree(sbi->s_blockgroup_lock); |
1da177e4 | 460 | kfree(sbi); |
1da177e4 LT |
461 | } |
462 | ||
e18b890b | 463 | static struct kmem_cache *ext3_inode_cachep; |
1da177e4 LT |
464 | |
465 | /* | |
466 | * Called inside transaction, so use GFP_NOFS | |
467 | */ | |
468 | static struct inode *ext3_alloc_inode(struct super_block *sb) | |
469 | { | |
470 | struct ext3_inode_info *ei; | |
471 | ||
e6b4f8da | 472 | ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS); |
1da177e4 LT |
473 | if (!ei) |
474 | return NULL; | |
1da177e4 LT |
475 | ei->i_block_alloc_info = NULL; |
476 | ei->vfs_inode.i_version = 1; | |
fe8bc91c JK |
477 | atomic_set(&ei->i_datasync_tid, 0); |
478 | atomic_set(&ei->i_sync_tid, 0); | |
1da177e4 LT |
479 | return &ei->vfs_inode; |
480 | } | |
481 | ||
482 | static void ext3_destroy_inode(struct inode *inode) | |
483 | { | |
9f7dd93d VA |
484 | if (!list_empty(&(EXT3_I(inode)->i_orphan))) { |
485 | printk("EXT3 Inode %p: orphan list check failed!\n", | |
486 | EXT3_I(inode)); | |
487 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
488 | EXT3_I(inode), sizeof(struct ext3_inode_info), | |
489 | false); | |
490 | dump_stack(); | |
491 | } | |
1da177e4 LT |
492 | kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); |
493 | } | |
494 | ||
51cc5068 | 495 | static void init_once(void *foo) |
1da177e4 LT |
496 | { |
497 | struct ext3_inode_info *ei = (struct ext3_inode_info *) foo; | |
498 | ||
a35afb83 | 499 | INIT_LIST_HEAD(&ei->i_orphan); |
1da177e4 | 500 | #ifdef CONFIG_EXT3_FS_XATTR |
a35afb83 | 501 | init_rwsem(&ei->xattr_sem); |
1da177e4 | 502 | #endif |
a35afb83 CL |
503 | mutex_init(&ei->truncate_mutex); |
504 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 505 | } |
ae6ddcc5 | 506 | |
1da177e4 LT |
507 | static int init_inodecache(void) |
508 | { | |
509 | ext3_inode_cachep = kmem_cache_create("ext3_inode_cache", | |
510 | sizeof(struct ext3_inode_info), | |
fffb60f9 PJ |
511 | 0, (SLAB_RECLAIM_ACCOUNT| |
512 | SLAB_MEM_SPREAD), | |
20c2df83 | 513 | init_once); |
1da177e4 LT |
514 | if (ext3_inode_cachep == NULL) |
515 | return -ENOMEM; | |
516 | return 0; | |
517 | } | |
518 | ||
519 | static void destroy_inodecache(void) | |
520 | { | |
1a1d92c1 | 521 | kmem_cache_destroy(ext3_inode_cachep); |
1da177e4 LT |
522 | } |
523 | ||
6cd37cda | 524 | static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) |
8fc2751b | 525 | { |
6cd37cda | 526 | #if defined(CONFIG_QUOTA) |
275abf5b | 527 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
8fc2751b | 528 | |
1aeec434 JK |
529 | if (sbi->s_jquota_fmt) { |
530 | char *fmtname = ""; | |
531 | ||
532 | switch (sbi->s_jquota_fmt) { | |
533 | case QFMT_VFS_OLD: | |
534 | fmtname = "vfsold"; | |
535 | break; | |
536 | case QFMT_VFS_V0: | |
537 | fmtname = "vfsv0"; | |
538 | break; | |
539 | case QFMT_VFS_V1: | |
540 | fmtname = "vfsv1"; | |
541 | break; | |
542 | } | |
543 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
544 | } | |
8fc2751b MB |
545 | |
546 | if (sbi->s_qf_names[USRQUOTA]) | |
547 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
548 | ||
549 | if (sbi->s_qf_names[GRPQUOTA]) | |
550 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
551 | ||
e3c96435 | 552 | if (test_opt(sb, USRQUOTA)) |
8fc2751b MB |
553 | seq_puts(seq, ",usrquota"); |
554 | ||
e3c96435 | 555 | if (test_opt(sb, GRPQUOTA)) |
8fc2751b MB |
556 | seq_puts(seq, ",grpquota"); |
557 | #endif | |
6cd37cda PO |
558 | } |
559 | ||
3c4cec65 JK |
560 | static char *data_mode_string(unsigned long mode) |
561 | { | |
562 | switch (mode) { | |
563 | case EXT3_MOUNT_JOURNAL_DATA: | |
564 | return "journal"; | |
565 | case EXT3_MOUNT_ORDERED_DATA: | |
566 | return "ordered"; | |
567 | case EXT3_MOUNT_WRITEBACK_DATA: | |
568 | return "writeback"; | |
569 | } | |
570 | return "unknown"; | |
571 | } | |
572 | ||
571beed8 MS |
573 | /* |
574 | * Show an option if | |
575 | * - it's set to a non-default value OR | |
576 | * - if the per-sb default is different from the global default | |
577 | */ | |
6cd37cda PO |
578 | static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) |
579 | { | |
580 | struct super_block *sb = vfs->mnt_sb; | |
571beed8 MS |
581 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
582 | struct ext3_super_block *es = sbi->s_es; | |
583 | unsigned long def_mount_opts; | |
584 | ||
585 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
586 | ||
587 | if (sbi->s_sb_block != 1) | |
588 | seq_printf(seq, ",sb=%lu", sbi->s_sb_block); | |
589 | if (test_opt(sb, MINIX_DF)) | |
590 | seq_puts(seq, ",minixdf"); | |
591 | if (test_opt(sb, GRPID)) | |
592 | seq_puts(seq, ",grpid"); | |
593 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS)) | |
594 | seq_puts(seq, ",nogrpid"); | |
595 | if (sbi->s_resuid != EXT3_DEF_RESUID || | |
596 | le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) { | |
597 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
598 | } | |
599 | if (sbi->s_resgid != EXT3_DEF_RESGID || | |
600 | le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) { | |
601 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
602 | } | |
1eca93f9 | 603 | if (test_opt(sb, ERRORS_RO)) { |
571beed8 MS |
604 | int def_errors = le16_to_cpu(es->s_errors); |
605 | ||
606 | if (def_errors == EXT3_ERRORS_PANIC || | |
1eca93f9 AK |
607 | def_errors == EXT3_ERRORS_CONTINUE) { |
608 | seq_puts(seq, ",errors=remount-ro"); | |
571beed8 MS |
609 | } |
610 | } | |
1eca93f9 AK |
611 | if (test_opt(sb, ERRORS_CONT)) |
612 | seq_puts(seq, ",errors=continue"); | |
571beed8 MS |
613 | if (test_opt(sb, ERRORS_PANIC)) |
614 | seq_puts(seq, ",errors=panic"); | |
615 | if (test_opt(sb, NO_UID32)) | |
616 | seq_puts(seq, ",nouid32"); | |
617 | if (test_opt(sb, DEBUG)) | |
618 | seq_puts(seq, ",debug"); | |
619 | if (test_opt(sb, OLDALLOC)) | |
620 | seq_puts(seq, ",oldalloc"); | |
621 | #ifdef CONFIG_EXT3_FS_XATTR | |
622 | if (test_opt(sb, XATTR_USER)) | |
623 | seq_puts(seq, ",user_xattr"); | |
624 | if (!test_opt(sb, XATTR_USER) && | |
625 | (def_mount_opts & EXT3_DEFM_XATTR_USER)) { | |
626 | seq_puts(seq, ",nouser_xattr"); | |
627 | } | |
628 | #endif | |
629 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
630 | if (test_opt(sb, POSIX_ACL)) | |
631 | seq_puts(seq, ",acl"); | |
632 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL)) | |
633 | seq_puts(seq, ",noacl"); | |
634 | #endif | |
635 | if (!test_opt(sb, RESERVATION)) | |
636 | seq_puts(seq, ",noreservation"); | |
637 | if (sbi->s_commit_interval) { | |
638 | seq_printf(seq, ",commit=%u", | |
639 | (unsigned) (sbi->s_commit_interval / HZ)); | |
640 | } | |
0636c73e ES |
641 | |
642 | /* | |
643 | * Always display barrier state so it's clear what the status is. | |
644 | */ | |
645 | seq_puts(seq, ",barrier="); | |
646 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
e3c96435 | 647 | seq_printf(seq, ",data=%s", data_mode_string(test_opt(sb, DATA_FLAGS))); |
0e4fb5e2 HK |
648 | if (test_opt(sb, DATA_ERR_ABORT)) |
649 | seq_puts(seq, ",data_err=abort"); | |
650 | ||
dee1d3b6 ES |
651 | if (test_opt(sb, NOLOAD)) |
652 | seq_puts(seq, ",norecovery"); | |
653 | ||
6cd37cda | 654 | ext3_show_quota_options(seq, sb); |
8fc2751b MB |
655 | |
656 | return 0; | |
657 | } | |
1da177e4 | 658 | |
fdb36673 | 659 | |
74af0baa CH |
660 | static struct inode *ext3_nfs_get_inode(struct super_block *sb, |
661 | u64 ino, u32 generation) | |
fdb36673 | 662 | { |
fdb36673 | 663 | struct inode *inode; |
fdb36673 N |
664 | |
665 | if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO) | |
666 | return ERR_PTR(-ESTALE); | |
667 | if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) | |
668 | return ERR_PTR(-ESTALE); | |
669 | ||
670 | /* iget isn't really right if the inode is currently unallocated!! | |
671 | * | |
672 | * ext3_read_inode will return a bad_inode if the inode had been | |
673 | * deleted, so we should be safe. | |
674 | * | |
675 | * Currently we don't know the generation for parent directory, so | |
676 | * a generation of 0 means "accept any" | |
677 | */ | |
473043dc DH |
678 | inode = ext3_iget(sb, ino); |
679 | if (IS_ERR(inode)) | |
680 | return ERR_CAST(inode); | |
681 | if (generation && inode->i_generation != generation) { | |
fdb36673 N |
682 | iput(inode); |
683 | return ERR_PTR(-ESTALE); | |
684 | } | |
74af0baa CH |
685 | |
686 | return inode; | |
687 | } | |
688 | ||
689 | static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
690 | int fh_len, int fh_type) | |
691 | { | |
692 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
693 | ext3_nfs_get_inode); | |
694 | } | |
695 | ||
696 | static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid, | |
697 | int fh_len, int fh_type) | |
698 | { | |
699 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
700 | ext3_nfs_get_inode); | |
fdb36673 N |
701 | } |
702 | ||
6b082b53 TO |
703 | /* |
704 | * Try to release metadata pages (indirect blocks, directories) which are | |
705 | * mapped via the block device. Since these pages could have journal heads | |
706 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
707 | * jbd layer's try_to_free_buffers() function to release them. | |
708 | */ | |
709 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, | |
710 | gfp_t wait) | |
711 | { | |
712 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
713 | ||
714 | WARN_ON(PageChecked(page)); | |
715 | if (!page_has_buffers(page)) | |
716 | return 0; | |
717 | if (journal) | |
718 | return journal_try_to_free_buffers(journal, page, | |
719 | wait & ~__GFP_WAIT); | |
720 | return try_to_free_buffers(page); | |
721 | } | |
722 | ||
8fc2751b | 723 | #ifdef CONFIG_QUOTA |
1da177e4 LT |
724 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
725 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) | |
726 | ||
1da177e4 LT |
727 | static int ext3_write_dquot(struct dquot *dquot); |
728 | static int ext3_acquire_dquot(struct dquot *dquot); | |
729 | static int ext3_release_dquot(struct dquot *dquot); | |
730 | static int ext3_mark_dquot_dirty(struct dquot *dquot); | |
731 | static int ext3_write_info(struct super_block *sb, int type); | |
2fd83a4f | 732 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, |
307ae18a | 733 | char *path); |
1da177e4 LT |
734 | static int ext3_quota_on_mount(struct super_block *sb, int type); |
735 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
736 | size_t len, loff_t off); | |
737 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
738 | const char *data, size_t len, loff_t off); | |
739 | ||
61e225dc | 740 | static const struct dquot_operations ext3_quota_operations = { |
1da177e4 LT |
741 | .write_dquot = ext3_write_dquot, |
742 | .acquire_dquot = ext3_acquire_dquot, | |
743 | .release_dquot = ext3_release_dquot, | |
744 | .mark_dirty = ext3_mark_dquot_dirty, | |
157091a2 JK |
745 | .write_info = ext3_write_info, |
746 | .alloc_dquot = dquot_alloc, | |
747 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
748 | }; |
749 | ||
0d54b217 | 750 | static const struct quotactl_ops ext3_qctl_operations = { |
1da177e4 | 751 | .quota_on = ext3_quota_on, |
287a8095 CH |
752 | .quota_off = dquot_quota_off, |
753 | .quota_sync = dquot_quota_sync, | |
754 | .get_info = dquot_get_dqinfo, | |
755 | .set_info = dquot_set_dqinfo, | |
756 | .get_dqblk = dquot_get_dqblk, | |
757 | .set_dqblk = dquot_set_dqblk | |
1da177e4 LT |
758 | }; |
759 | #endif | |
760 | ||
ee9b6d61 | 761 | static const struct super_operations ext3_sops = { |
1da177e4 LT |
762 | .alloc_inode = ext3_alloc_inode, |
763 | .destroy_inode = ext3_destroy_inode, | |
1da177e4 LT |
764 | .write_inode = ext3_write_inode, |
765 | .dirty_inode = ext3_dirty_inode, | |
ac14a95b | 766 | .evict_inode = ext3_evict_inode, |
1da177e4 | 767 | .put_super = ext3_put_super, |
1da177e4 | 768 | .sync_fs = ext3_sync_fs, |
c4be0c1d TS |
769 | .freeze_fs = ext3_freeze, |
770 | .unfreeze_fs = ext3_unfreeze, | |
1da177e4 LT |
771 | .statfs = ext3_statfs, |
772 | .remount_fs = ext3_remount, | |
8fc2751b | 773 | .show_options = ext3_show_options, |
1da177e4 LT |
774 | #ifdef CONFIG_QUOTA |
775 | .quota_read = ext3_quota_read, | |
776 | .quota_write = ext3_quota_write, | |
777 | #endif | |
6b082b53 | 778 | .bdev_try_to_free_page = bdev_try_to_free_page, |
1da177e4 LT |
779 | }; |
780 | ||
39655164 | 781 | static const struct export_operations ext3_export_ops = { |
74af0baa CH |
782 | .fh_to_dentry = ext3_fh_to_dentry, |
783 | .fh_to_parent = ext3_fh_to_parent, | |
1da177e4 LT |
784 | .get_parent = ext3_get_parent, |
785 | }; | |
786 | ||
787 | enum { | |
788 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
789 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
2860b733 | 790 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, |
1da177e4 | 791 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
ade1a29e | 792 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, |
71b96257 | 793 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, |
1da177e4 | 794 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
0e4fb5e2 | 795 | Opt_data_err_abort, Opt_data_err_ignore, |
1da177e4 | 796 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1aeec434 | 797 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
0636c73e ES |
798 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, |
799 | Opt_resize, Opt_usrquota, Opt_grpquota | |
1da177e4 LT |
800 | }; |
801 | ||
a447c093 | 802 | static const match_table_t tokens = { |
1da177e4 LT |
803 | {Opt_bsd_df, "bsddf"}, |
804 | {Opt_minix_df, "minixdf"}, | |
805 | {Opt_grpid, "grpid"}, | |
806 | {Opt_grpid, "bsdgroups"}, | |
807 | {Opt_nogrpid, "nogrpid"}, | |
808 | {Opt_nogrpid, "sysvgroups"}, | |
809 | {Opt_resgid, "resgid=%u"}, | |
810 | {Opt_resuid, "resuid=%u"}, | |
811 | {Opt_sb, "sb=%u"}, | |
812 | {Opt_err_cont, "errors=continue"}, | |
813 | {Opt_err_panic, "errors=panic"}, | |
814 | {Opt_err_ro, "errors=remount-ro"}, | |
815 | {Opt_nouid32, "nouid32"}, | |
816 | {Opt_nocheck, "nocheck"}, | |
817 | {Opt_nocheck, "check=none"}, | |
1da177e4 LT |
818 | {Opt_debug, "debug"}, |
819 | {Opt_oldalloc, "oldalloc"}, | |
820 | {Opt_orlov, "orlov"}, | |
821 | {Opt_user_xattr, "user_xattr"}, | |
822 | {Opt_nouser_xattr, "nouser_xattr"}, | |
823 | {Opt_acl, "acl"}, | |
824 | {Opt_noacl, "noacl"}, | |
825 | {Opt_reservation, "reservation"}, | |
826 | {Opt_noreservation, "noreservation"}, | |
827 | {Opt_noload, "noload"}, | |
dee1d3b6 | 828 | {Opt_noload, "norecovery"}, |
1da177e4 | 829 | {Opt_nobh, "nobh"}, |
ade1a29e | 830 | {Opt_bh, "bh"}, |
1da177e4 LT |
831 | {Opt_commit, "commit=%u"}, |
832 | {Opt_journal_update, "journal=update"}, | |
833 | {Opt_journal_inum, "journal=%u"}, | |
71b96257 | 834 | {Opt_journal_dev, "journal_dev=%u"}, |
1da177e4 LT |
835 | {Opt_abort, "abort"}, |
836 | {Opt_data_journal, "data=journal"}, | |
837 | {Opt_data_ordered, "data=ordered"}, | |
838 | {Opt_data_writeback, "data=writeback"}, | |
0e4fb5e2 HK |
839 | {Opt_data_err_abort, "data_err=abort"}, |
840 | {Opt_data_err_ignore, "data_err=ignore"}, | |
1da177e4 LT |
841 | {Opt_offusrjquota, "usrjquota="}, |
842 | {Opt_usrjquota, "usrjquota=%s"}, | |
843 | {Opt_offgrpjquota, "grpjquota="}, | |
844 | {Opt_grpjquota, "grpjquota=%s"}, | |
845 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
846 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1aeec434 | 847 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
8fc2751b | 848 | {Opt_grpquota, "grpquota"}, |
1f54587b JK |
849 | {Opt_noquota, "noquota"}, |
850 | {Opt_quota, "quota"}, | |
8fc2751b | 851 | {Opt_usrquota, "usrquota"}, |
1da177e4 | 852 | {Opt_barrier, "barrier=%u"}, |
0636c73e ES |
853 | {Opt_barrier, "barrier"}, |
854 | {Opt_nobarrier, "nobarrier"}, | |
1da177e4 | 855 | {Opt_resize, "resize"}, |
92587216 | 856 | {Opt_err, NULL}, |
1da177e4 LT |
857 | }; |
858 | ||
4cf46b67 | 859 | static ext3_fsblk_t get_sb_block(void **data, struct super_block *sb) |
1da177e4 | 860 | { |
e9ad5620 DK |
861 | ext3_fsblk_t sb_block; |
862 | char *options = (char *) *data; | |
1da177e4 LT |
863 | |
864 | if (!options || strncmp(options, "sb=", 3) != 0) | |
865 | return 1; /* Default location */ | |
866 | options += 3; | |
43d23f90 | 867 | /*todo: use simple_strtoll with >32bit ext3 */ |
1da177e4 LT |
868 | sb_block = simple_strtoul(options, &options, 0); |
869 | if (*options && *options != ',') { | |
4cf46b67 | 870 | ext3_msg(sb, "error: invalid sb specification: %s", |
1da177e4 LT |
871 | (char *) *data); |
872 | return 1; | |
873 | } | |
874 | if (*options == ',') | |
875 | options++; | |
876 | *data = (void *) options; | |
877 | return sb_block; | |
878 | } | |
879 | ||
e1f5c67a DM |
880 | #ifdef CONFIG_QUOTA |
881 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
882 | { | |
883 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
884 | char *qname; | |
885 | ||
886 | if (sb_any_quota_loaded(sb) && | |
887 | !sbi->s_qf_names[qtype]) { | |
888 | ext3_msg(sb, KERN_ERR, | |
889 | "Cannot change journaled " | |
890 | "quota options when quota turned on"); | |
891 | return 0; | |
892 | } | |
893 | qname = match_strdup(args); | |
894 | if (!qname) { | |
895 | ext3_msg(sb, KERN_ERR, | |
896 | "Not enough memory for storing quotafile name"); | |
897 | return 0; | |
898 | } | |
899 | if (sbi->s_qf_names[qtype] && | |
900 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
901 | ext3_msg(sb, KERN_ERR, | |
902 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
903 | kfree(qname); | |
904 | return 0; | |
905 | } | |
906 | sbi->s_qf_names[qtype] = qname; | |
907 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
908 | ext3_msg(sb, KERN_ERR, | |
909 | "quotafile must be on filesystem root"); | |
910 | kfree(sbi->s_qf_names[qtype]); | |
911 | sbi->s_qf_names[qtype] = NULL; | |
912 | return 0; | |
913 | } | |
914 | set_opt(sbi->s_mount_opt, QUOTA); | |
915 | return 1; | |
916 | } | |
917 | ||
918 | static int clear_qf_name(struct super_block *sb, int qtype) { | |
919 | ||
920 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
921 | ||
922 | if (sb_any_quota_loaded(sb) && | |
923 | sbi->s_qf_names[qtype]) { | |
924 | ext3_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
925 | " when quota turned on"); | |
926 | return 0; | |
927 | } | |
928 | /* | |
929 | * The space will be released later when all options are confirmed | |
930 | * to be correct | |
931 | */ | |
932 | sbi->s_qf_names[qtype] = NULL; | |
933 | return 1; | |
934 | } | |
935 | #endif | |
936 | ||
71b96257 | 937 | static int parse_options (char *options, struct super_block *sb, |
eee194e7 | 938 | unsigned int *inum, unsigned long *journal_devnum, |
43d23f90 | 939 | ext3_fsblk_t *n_blocks_count, int is_remount) |
1da177e4 LT |
940 | { |
941 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
942 | char * p; | |
943 | substring_t args[MAX_OPT_ARGS]; | |
944 | int data_opt = 0; | |
945 | int option; | |
946 | #ifdef CONFIG_QUOTA | |
e1f5c67a | 947 | int qfmt; |
1da177e4 LT |
948 | #endif |
949 | ||
950 | if (!options) | |
951 | return 1; | |
952 | ||
953 | while ((p = strsep (&options, ",")) != NULL) { | |
954 | int token; | |
955 | if (!*p) | |
956 | continue; | |
0636c73e ES |
957 | /* |
958 | * Initialize args struct so we know whether arg was | |
959 | * found; some options take optional arguments. | |
960 | */ | |
961 | args[0].to = args[0].from = 0; | |
1da177e4 LT |
962 | token = match_token(p, tokens, args); |
963 | switch (token) { | |
964 | case Opt_bsd_df: | |
965 | clear_opt (sbi->s_mount_opt, MINIX_DF); | |
966 | break; | |
967 | case Opt_minix_df: | |
968 | set_opt (sbi->s_mount_opt, MINIX_DF); | |
969 | break; | |
970 | case Opt_grpid: | |
971 | set_opt (sbi->s_mount_opt, GRPID); | |
972 | break; | |
973 | case Opt_nogrpid: | |
974 | clear_opt (sbi->s_mount_opt, GRPID); | |
975 | break; | |
976 | case Opt_resuid: | |
977 | if (match_int(&args[0], &option)) | |
978 | return 0; | |
979 | sbi->s_resuid = option; | |
980 | break; | |
981 | case Opt_resgid: | |
982 | if (match_int(&args[0], &option)) | |
983 | return 0; | |
984 | sbi->s_resgid = option; | |
985 | break; | |
986 | case Opt_sb: | |
987 | /* handled by get_sb_block() instead of here */ | |
988 | /* *sb_block = match_int(&args[0]); */ | |
989 | break; | |
990 | case Opt_err_panic: | |
991 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
992 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
993 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
994 | break; | |
995 | case Opt_err_ro: | |
996 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
997 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
998 | set_opt (sbi->s_mount_opt, ERRORS_RO); | |
999 | break; | |
1000 | case Opt_err_cont: | |
1001 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
1002 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1003 | set_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1004 | break; | |
1005 | case Opt_nouid32: | |
1006 | set_opt (sbi->s_mount_opt, NO_UID32); | |
1007 | break; | |
1da177e4 LT |
1008 | case Opt_nocheck: |
1009 | clear_opt (sbi->s_mount_opt, CHECK); | |
1010 | break; | |
1011 | case Opt_debug: | |
1012 | set_opt (sbi->s_mount_opt, DEBUG); | |
1013 | break; | |
1014 | case Opt_oldalloc: | |
1015 | set_opt (sbi->s_mount_opt, OLDALLOC); | |
1016 | break; | |
1017 | case Opt_orlov: | |
1018 | clear_opt (sbi->s_mount_opt, OLDALLOC); | |
1019 | break; | |
1020 | #ifdef CONFIG_EXT3_FS_XATTR | |
1021 | case Opt_user_xattr: | |
1022 | set_opt (sbi->s_mount_opt, XATTR_USER); | |
1023 | break; | |
1024 | case Opt_nouser_xattr: | |
1025 | clear_opt (sbi->s_mount_opt, XATTR_USER); | |
1026 | break; | |
1027 | #else | |
1028 | case Opt_user_xattr: | |
1029 | case Opt_nouser_xattr: | |
4cf46b67 AF |
1030 | ext3_msg(sb, KERN_INFO, |
1031 | "(no)user_xattr options not supported"); | |
1da177e4 LT |
1032 | break; |
1033 | #endif | |
1034 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1035 | case Opt_acl: | |
1036 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1037 | break; | |
1038 | case Opt_noacl: | |
1039 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1040 | break; | |
1041 | #else | |
1042 | case Opt_acl: | |
1043 | case Opt_noacl: | |
4cf46b67 AF |
1044 | ext3_msg(sb, KERN_INFO, |
1045 | "(no)acl options not supported"); | |
1da177e4 LT |
1046 | break; |
1047 | #endif | |
1048 | case Opt_reservation: | |
1049 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1050 | break; | |
1051 | case Opt_noreservation: | |
1052 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
1053 | break; | |
1054 | case Opt_journal_update: | |
1055 | /* @@@ FIXME */ | |
1056 | /* Eventually we will want to be able to create | |
1057 | a journal file here. For now, only allow the | |
1058 | user to specify an existing inode to be the | |
1059 | journal file. */ | |
1060 | if (is_remount) { | |
4cf46b67 AF |
1061 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1062 | "journal on remount"); | |
1da177e4 LT |
1063 | return 0; |
1064 | } | |
1065 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); | |
1066 | break; | |
1067 | case Opt_journal_inum: | |
1068 | if (is_remount) { | |
4cf46b67 AF |
1069 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1070 | "journal on remount"); | |
1da177e4 LT |
1071 | return 0; |
1072 | } | |
1073 | if (match_int(&args[0], &option)) | |
1074 | return 0; | |
1075 | *inum = option; | |
1076 | break; | |
71b96257 JL |
1077 | case Opt_journal_dev: |
1078 | if (is_remount) { | |
4cf46b67 AF |
1079 | ext3_msg(sb, KERN_ERR, "error: cannot specify " |
1080 | "journal on remount"); | |
71b96257 JL |
1081 | return 0; |
1082 | } | |
1083 | if (match_int(&args[0], &option)) | |
1084 | return 0; | |
1085 | *journal_devnum = option; | |
1086 | break; | |
1da177e4 LT |
1087 | case Opt_noload: |
1088 | set_opt (sbi->s_mount_opt, NOLOAD); | |
1089 | break; | |
1090 | case Opt_commit: | |
1091 | if (match_int(&args[0], &option)) | |
1092 | return 0; | |
1093 | if (option < 0) | |
1094 | return 0; | |
1095 | if (option == 0) | |
1096 | option = JBD_DEFAULT_MAX_COMMIT_AGE; | |
1097 | sbi->s_commit_interval = HZ * option; | |
1098 | break; | |
1099 | case Opt_data_journal: | |
1100 | data_opt = EXT3_MOUNT_JOURNAL_DATA; | |
1101 | goto datacheck; | |
1102 | case Opt_data_ordered: | |
1103 | data_opt = EXT3_MOUNT_ORDERED_DATA; | |
1104 | goto datacheck; | |
1105 | case Opt_data_writeback: | |
1106 | data_opt = EXT3_MOUNT_WRITEBACK_DATA; | |
1107 | datacheck: | |
1108 | if (is_remount) { | |
e3c96435 | 1109 | if (test_opt(sb, DATA_FLAGS) == data_opt) |
3c4cec65 | 1110 | break; |
4cf46b67 AF |
1111 | ext3_msg(sb, KERN_ERR, |
1112 | "error: cannot change " | |
3c4cec65 JK |
1113 | "data mode on remount. The filesystem " |
1114 | "is mounted in data=%s mode and you " | |
4cf46b67 | 1115 | "try to remount it in data=%s mode.", |
e3c96435 DM |
1116 | data_mode_string(test_opt(sb, |
1117 | DATA_FLAGS)), | |
3c4cec65 JK |
1118 | data_mode_string(data_opt)); |
1119 | return 0; | |
1da177e4 | 1120 | } else { |
e3c96435 | 1121 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
1da177e4 LT |
1122 | sbi->s_mount_opt |= data_opt; |
1123 | } | |
1124 | break; | |
0e4fb5e2 HK |
1125 | case Opt_data_err_abort: |
1126 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1127 | break; | |
1128 | case Opt_data_err_ignore: | |
1129 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1130 | break; | |
1da177e4 LT |
1131 | #ifdef CONFIG_QUOTA |
1132 | case Opt_usrjquota: | |
e1f5c67a | 1133 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
1da177e4 | 1134 | return 0; |
e1f5c67a DM |
1135 | break; |
1136 | case Opt_grpjquota: | |
1137 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
1da177e4 | 1138 | return 0; |
1da177e4 LT |
1139 | break; |
1140 | case Opt_offusrjquota: | |
e1f5c67a DM |
1141 | if (!clear_qf_name(sb, USRQUOTA)) |
1142 | return 0; | |
1143 | break; | |
1da177e4 | 1144 | case Opt_offgrpjquota: |
e1f5c67a | 1145 | if (!clear_qf_name(sb, GRPQUOTA)) |
1da177e4 | 1146 | return 0; |
1da177e4 LT |
1147 | break; |
1148 | case Opt_jqfmt_vfsold: | |
d06bf1d2 JK |
1149 | qfmt = QFMT_VFS_OLD; |
1150 | goto set_qf_format; | |
1da177e4 | 1151 | case Opt_jqfmt_vfsv0: |
d06bf1d2 | 1152 | qfmt = QFMT_VFS_V0; |
1aeec434 JK |
1153 | goto set_qf_format; |
1154 | case Opt_jqfmt_vfsv1: | |
1155 | qfmt = QFMT_VFS_V1; | |
d06bf1d2 | 1156 | set_qf_format: |
ee0d5ffe | 1157 | if (sb_any_quota_loaded(sb) && |
d06bf1d2 | 1158 | sbi->s_jquota_fmt != qfmt) { |
4cf46b67 | 1159 | ext3_msg(sb, KERN_ERR, "error: cannot change " |
d06bf1d2 | 1160 | "journaled quota options when " |
4cf46b67 | 1161 | "quota turned on."); |
d06bf1d2 JK |
1162 | return 0; |
1163 | } | |
1164 | sbi->s_jquota_fmt = qfmt; | |
1da177e4 | 1165 | break; |
1f54587b | 1166 | case Opt_quota: |
8fc2751b MB |
1167 | case Opt_usrquota: |
1168 | set_opt(sbi->s_mount_opt, QUOTA); | |
1169 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1170 | break; | |
1171 | case Opt_grpquota: | |
1f54587b | 1172 | set_opt(sbi->s_mount_opt, QUOTA); |
8fc2751b | 1173 | set_opt(sbi->s_mount_opt, GRPQUOTA); |
1f54587b JK |
1174 | break; |
1175 | case Opt_noquota: | |
ee0d5ffe | 1176 | if (sb_any_quota_loaded(sb)) { |
4cf46b67 AF |
1177 | ext3_msg(sb, KERN_ERR, "error: cannot change " |
1178 | "quota options when quota turned on."); | |
1f54587b JK |
1179 | return 0; |
1180 | } | |
1181 | clear_opt(sbi->s_mount_opt, QUOTA); | |
8fc2751b MB |
1182 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1183 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1f54587b | 1184 | break; |
1da177e4 | 1185 | #else |
8fc2751b MB |
1186 | case Opt_quota: |
1187 | case Opt_usrquota: | |
1188 | case Opt_grpquota: | |
4cf46b67 AF |
1189 | ext3_msg(sb, KERN_ERR, |
1190 | "error: quota options not supported."); | |
fa1ff1e0 | 1191 | break; |
1da177e4 LT |
1192 | case Opt_usrjquota: |
1193 | case Opt_grpjquota: | |
1194 | case Opt_offusrjquota: | |
1195 | case Opt_offgrpjquota: | |
1196 | case Opt_jqfmt_vfsold: | |
1197 | case Opt_jqfmt_vfsv0: | |
1aeec434 | 1198 | case Opt_jqfmt_vfsv1: |
4cf46b67 AF |
1199 | ext3_msg(sb, KERN_ERR, |
1200 | "error: journaled quota options not " | |
1201 | "supported."); | |
1da177e4 | 1202 | break; |
1f54587b JK |
1203 | case Opt_noquota: |
1204 | break; | |
1da177e4 LT |
1205 | #endif |
1206 | case Opt_abort: | |
1207 | set_opt(sbi->s_mount_opt, ABORT); | |
1208 | break; | |
0636c73e ES |
1209 | case Opt_nobarrier: |
1210 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1211 | break; | |
1da177e4 | 1212 | case Opt_barrier: |
0636c73e ES |
1213 | if (args[0].from) { |
1214 | if (match_int(&args[0], &option)) | |
1215 | return 0; | |
1216 | } else | |
1217 | option = 1; /* No argument, default to 1 */ | |
1da177e4 LT |
1218 | if (option) |
1219 | set_opt(sbi->s_mount_opt, BARRIER); | |
1220 | else | |
1221 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1222 | break; | |
1223 | case Opt_ignore: | |
1224 | break; | |
1225 | case Opt_resize: | |
08c6a96f | 1226 | if (!is_remount) { |
4cf46b67 AF |
1227 | ext3_msg(sb, KERN_ERR, |
1228 | "error: resize option only available " | |
1229 | "for remount"); | |
1da177e4 LT |
1230 | return 0; |
1231 | } | |
c7f1721e KZ |
1232 | if (match_int(&args[0], &option) != 0) |
1233 | return 0; | |
1da177e4 LT |
1234 | *n_blocks_count = option; |
1235 | break; | |
1236 | case Opt_nobh: | |
4c4d3901 CH |
1237 | ext3_msg(sb, KERN_WARNING, |
1238 | "warning: ignoring deprecated nobh option"); | |
1da177e4 | 1239 | break; |
ade1a29e | 1240 | case Opt_bh: |
4c4d3901 CH |
1241 | ext3_msg(sb, KERN_WARNING, |
1242 | "warning: ignoring deprecated bh option"); | |
ade1a29e | 1243 | break; |
1da177e4 | 1244 | default: |
4cf46b67 AF |
1245 | ext3_msg(sb, KERN_ERR, |
1246 | "error: unrecognized mount option \"%s\" " | |
1247 | "or missing value", p); | |
1da177e4 LT |
1248 | return 0; |
1249 | } | |
1250 | } | |
1251 | #ifdef CONFIG_QUOTA | |
8fc2751b | 1252 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
e3c96435 | 1253 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
8fc2751b | 1254 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
e3c96435 | 1255 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
8fc2751b MB |
1256 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
1257 | ||
e1f5c67a | 1258 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
4cf46b67 AF |
1259 | ext3_msg(sb, KERN_ERR, "error: old and new quota " |
1260 | "format mixing."); | |
8fc2751b MB |
1261 | return 0; |
1262 | } | |
1263 | ||
1264 | if (!sbi->s_jquota_fmt) { | |
4cf46b67 AF |
1265 | ext3_msg(sb, KERN_ERR, "error: journaled quota format " |
1266 | "not specified."); | |
8fc2751b MB |
1267 | return 0; |
1268 | } | |
1269 | } else { | |
1270 | if (sbi->s_jquota_fmt) { | |
4cf46b67 | 1271 | ext3_msg(sb, KERN_ERR, "error: journaled quota format " |
99aeaf63 | 1272 | "specified with no journaling " |
4cf46b67 | 1273 | "enabled."); |
8fc2751b MB |
1274 | return 0; |
1275 | } | |
1da177e4 LT |
1276 | } |
1277 | #endif | |
1da177e4 LT |
1278 | return 1; |
1279 | } | |
1280 | ||
1281 | static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es, | |
1282 | int read_only) | |
1283 | { | |
1284 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1285 | int res = 0; | |
1286 | ||
1287 | if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) { | |
4cf46b67 AF |
1288 | ext3_msg(sb, KERN_ERR, |
1289 | "error: revision level too high, " | |
1290 | "forcing read-only mode"); | |
1da177e4 LT |
1291 | res = MS_RDONLY; |
1292 | } | |
1293 | if (read_only) | |
1294 | return res; | |
1295 | if (!(sbi->s_mount_state & EXT3_VALID_FS)) | |
4cf46b67 AF |
1296 | ext3_msg(sb, KERN_WARNING, |
1297 | "warning: mounting unchecked fs, " | |
1298 | "running e2fsck is recommended"); | |
1da177e4 | 1299 | else if ((sbi->s_mount_state & EXT3_ERROR_FS)) |
4cf46b67 AF |
1300 | ext3_msg(sb, KERN_WARNING, |
1301 | "warning: mounting fs with errors, " | |
1302 | "running e2fsck is recommended"); | |
df0d6b8f | 1303 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
1da177e4 | 1304 | le16_to_cpu(es->s_mnt_count) >= |
df0d6b8f | 1305 | le16_to_cpu(es->s_max_mnt_count)) |
4cf46b67 AF |
1306 | ext3_msg(sb, KERN_WARNING, |
1307 | "warning: maximal mount count reached, " | |
1308 | "running e2fsck is recommended"); | |
1da177e4 LT |
1309 | else if (le32_to_cpu(es->s_checkinterval) && |
1310 | (le32_to_cpu(es->s_lastcheck) + | |
1311 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
4cf46b67 AF |
1312 | ext3_msg(sb, KERN_WARNING, |
1313 | "warning: checktime reached, " | |
1314 | "running e2fsck is recommended"); | |
1da177e4 LT |
1315 | #if 0 |
1316 | /* @@@ We _will_ want to clear the valid bit if we find | |
1317 | inconsistencies, to force a fsck at reboot. But for | |
1318 | a plain journaled filesystem we can keep it set as | |
1319 | valid forever! :) */ | |
e7f23ebd | 1320 | es->s_state &= cpu_to_le16(~EXT3_VALID_FS); |
1da177e4 | 1321 | #endif |
df0d6b8f | 1322 | if (!le16_to_cpu(es->s_max_mnt_count)) |
1da177e4 | 1323 | es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT); |
50e8a289 | 1324 | le16_add_cpu(&es->s_mnt_count, 1); |
1da177e4 LT |
1325 | es->s_mtime = cpu_to_le32(get_seconds()); |
1326 | ext3_update_dynamic_rev(sb); | |
1327 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1328 | ||
1329 | ext3_commit_super(sb, es, 1); | |
1330 | if (test_opt(sb, DEBUG)) | |
4cf46b67 AF |
1331 | ext3_msg(sb, KERN_INFO, "[bs=%lu, gc=%lu, " |
1332 | "bpg=%lu, ipg=%lu, mo=%04lx]", | |
1da177e4 LT |
1333 | sb->s_blocksize, |
1334 | sbi->s_groups_count, | |
1335 | EXT3_BLOCKS_PER_GROUP(sb), | |
1336 | EXT3_INODES_PER_GROUP(sb), | |
1337 | sbi->s_mount_opt); | |
1338 | ||
1da177e4 LT |
1339 | if (EXT3_SB(sb)->s_journal->j_inode == NULL) { |
1340 | char b[BDEVNAME_SIZE]; | |
4cf46b67 | 1341 | ext3_msg(sb, KERN_INFO, "using external journal on %s", |
1da177e4 LT |
1342 | bdevname(EXT3_SB(sb)->s_journal->j_dev, b)); |
1343 | } else { | |
4cf46b67 | 1344 | ext3_msg(sb, KERN_INFO, "using internal journal"); |
1da177e4 | 1345 | } |
1da177e4 LT |
1346 | return res; |
1347 | } | |
1348 | ||
1349 | /* Called at mount-time, super-block is locked */ | |
197cd65a | 1350 | static int ext3_check_descriptors(struct super_block *sb) |
1da177e4 LT |
1351 | { |
1352 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
1da177e4 LT |
1353 | int i; |
1354 | ||
1355 | ext3_debug ("Checking group descriptors"); | |
1356 | ||
197cd65a AM |
1357 | for (i = 0; i < sbi->s_groups_count; i++) { |
1358 | struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL); | |
1eaafeae AM |
1359 | ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i); |
1360 | ext3_fsblk_t last_block; | |
197cd65a | 1361 | |
855565e8 ES |
1362 | if (i == sbi->s_groups_count - 1) |
1363 | last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1; | |
1364 | else | |
1365 | last_block = first_block + | |
1366 | (EXT3_BLOCKS_PER_GROUP(sb) - 1); | |
1367 | ||
855565e8 ES |
1368 | if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || |
1369 | le32_to_cpu(gdp->bg_block_bitmap) > last_block) | |
1da177e4 LT |
1370 | { |
1371 | ext3_error (sb, "ext3_check_descriptors", | |
1372 | "Block bitmap for group %d" | |
1373 | " not in group (block %lu)!", | |
1374 | i, (unsigned long) | |
1375 | le32_to_cpu(gdp->bg_block_bitmap)); | |
1376 | return 0; | |
1377 | } | |
855565e8 ES |
1378 | if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || |
1379 | le32_to_cpu(gdp->bg_inode_bitmap) > last_block) | |
1da177e4 LT |
1380 | { |
1381 | ext3_error (sb, "ext3_check_descriptors", | |
1382 | "Inode bitmap for group %d" | |
1383 | " not in group (block %lu)!", | |
1384 | i, (unsigned long) | |
1385 | le32_to_cpu(gdp->bg_inode_bitmap)); | |
1386 | return 0; | |
1387 | } | |
855565e8 | 1388 | if (le32_to_cpu(gdp->bg_inode_table) < first_block || |
780dcdb2 | 1389 | le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 > |
855565e8 | 1390 | last_block) |
1da177e4 LT |
1391 | { |
1392 | ext3_error (sb, "ext3_check_descriptors", | |
1393 | "Inode table for group %d" | |
1394 | " not in group (block %lu)!", | |
1395 | i, (unsigned long) | |
1396 | le32_to_cpu(gdp->bg_inode_table)); | |
1397 | return 0; | |
1398 | } | |
1da177e4 LT |
1399 | } |
1400 | ||
1401 | sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb)); | |
1402 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb)); | |
1403 | return 1; | |
1404 | } | |
1405 | ||
1406 | ||
1407 | /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at | |
1408 | * the superblock) which were deleted from all directories, but held open by | |
1409 | * a process at the time of a crash. We walk the list and try to delete these | |
1410 | * inodes at recovery time (only with a read-write filesystem). | |
1411 | * | |
1412 | * In order to keep the orphan inode chain consistent during traversal (in | |
1413 | * case of crash during recovery), we link each inode into the superblock | |
1414 | * orphan list_head and handle it the same way as an inode deletion during | |
1415 | * normal operation (which journals the operations for us). | |
1416 | * | |
1417 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1418 | * accidentally point at an in-use or already deleted inode. The worst that | |
1419 | * can happen in this case is that we get a "bit already cleared" message from | |
1420 | * ext3_free_inode(). The only reason we would point at a wrong inode is if | |
1421 | * e2fsck was run on this filesystem, and it must have already done the orphan | |
1422 | * inode cleanup for us, so we can safely abort without any further action. | |
1423 | */ | |
1424 | static void ext3_orphan_cleanup (struct super_block * sb, | |
1425 | struct ext3_super_block * es) | |
1426 | { | |
1427 | unsigned int s_flags = sb->s_flags; | |
1428 | int nr_orphans = 0, nr_truncates = 0; | |
1429 | #ifdef CONFIG_QUOTA | |
1430 | int i; | |
1431 | #endif | |
1432 | if (!es->s_last_orphan) { | |
1433 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1434 | return; | |
1435 | } | |
1436 | ||
a8f48a95 | 1437 | if (bdev_read_only(sb->s_bdev)) { |
4cf46b67 AF |
1438 | ext3_msg(sb, KERN_ERR, "error: write access " |
1439 | "unavailable, skipping orphan cleanup."); | |
a8f48a95 ES |
1440 | return; |
1441 | } | |
1442 | ||
1da177e4 LT |
1443 | if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { |
1444 | if (es->s_last_orphan) | |
1445 | jbd_debug(1, "Errors on filesystem, " | |
1446 | "clearing orphan list.\n"); | |
1447 | es->s_last_orphan = 0; | |
1448 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1449 | return; | |
1450 | } | |
1451 | ||
1452 | if (s_flags & MS_RDONLY) { | |
4cf46b67 | 1453 | ext3_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
1da177e4 LT |
1454 | sb->s_flags &= ~MS_RDONLY; |
1455 | } | |
1456 | #ifdef CONFIG_QUOTA | |
1457 | /* Needed for iput() to work correctly and not trash data */ | |
1458 | sb->s_flags |= MS_ACTIVE; | |
1459 | /* Turn on quotas so that they are updated correctly */ | |
1460 | for (i = 0; i < MAXQUOTAS; i++) { | |
1461 | if (EXT3_SB(sb)->s_qf_names[i]) { | |
1462 | int ret = ext3_quota_on_mount(sb, i); | |
1463 | if (ret < 0) | |
4cf46b67 AF |
1464 | ext3_msg(sb, KERN_ERR, |
1465 | "error: cannot turn on journaled " | |
1466 | "quota: %d", ret); | |
1da177e4 LT |
1467 | } |
1468 | } | |
1469 | #endif | |
1470 | ||
1471 | while (es->s_last_orphan) { | |
1472 | struct inode *inode; | |
1473 | ||
473043dc DH |
1474 | inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1475 | if (IS_ERR(inode)) { | |
1da177e4 LT |
1476 | es->s_last_orphan = 0; |
1477 | break; | |
1478 | } | |
1479 | ||
1480 | list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan); | |
871a2931 | 1481 | dquot_initialize(inode); |
1da177e4 LT |
1482 | if (inode->i_nlink) { |
1483 | printk(KERN_DEBUG | |
eee194e7 | 1484 | "%s: truncating inode %lu to %Ld bytes\n", |
e05b6b52 | 1485 | __func__, inode->i_ino, inode->i_size); |
eee194e7 | 1486 | jbd_debug(2, "truncating inode %lu to %Ld bytes\n", |
1da177e4 LT |
1487 | inode->i_ino, inode->i_size); |
1488 | ext3_truncate(inode); | |
1489 | nr_truncates++; | |
1490 | } else { | |
1491 | printk(KERN_DEBUG | |
eee194e7 | 1492 | "%s: deleting unreferenced inode %lu\n", |
e05b6b52 | 1493 | __func__, inode->i_ino); |
eee194e7 | 1494 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1da177e4 LT |
1495 | inode->i_ino); |
1496 | nr_orphans++; | |
1497 | } | |
1498 | iput(inode); /* The delete magic happens here! */ | |
1499 | } | |
1500 | ||
1501 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" | |
1502 | ||
1503 | if (nr_orphans) | |
4cf46b67 AF |
1504 | ext3_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
1505 | PLURAL(nr_orphans)); | |
1da177e4 | 1506 | if (nr_truncates) |
4cf46b67 AF |
1507 | ext3_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
1508 | PLURAL(nr_truncates)); | |
1da177e4 LT |
1509 | #ifdef CONFIG_QUOTA |
1510 | /* Turn quotas off */ | |
1511 | for (i = 0; i < MAXQUOTAS; i++) { | |
1512 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 1513 | dquot_quota_off(sb, i); |
1da177e4 LT |
1514 | } |
1515 | #endif | |
1516 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1517 | } | |
1518 | ||
1da177e4 LT |
1519 | /* |
1520 | * Maximal file size. There is a direct, and {,double-,triple-}indirect | |
1521 | * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. | |
1522 | * We need to be 1 filesystem block less than the 2^32 sector limit. | |
1523 | */ | |
1524 | static loff_t ext3_max_size(int bits) | |
1525 | { | |
1526 | loff_t res = EXT3_NDIR_BLOCKS; | |
fe7fdc37 AK |
1527 | int meta_blocks; |
1528 | loff_t upper_limit; | |
1529 | ||
1530 | /* This is calculated to be the largest file size for a | |
1531 | * dense, file such that the total number of | |
1da177e4 | 1532 | * sectors in the file, including data and all indirect blocks, |
fe7fdc37 AK |
1533 | * does not exceed 2^32 -1 |
1534 | * __u32 i_blocks representing the total number of | |
1535 | * 512 bytes blocks of the file | |
1536 | */ | |
1537 | upper_limit = (1LL << 32) - 1; | |
1538 | ||
1539 | /* total blocks in file system block size */ | |
1540 | upper_limit >>= (bits - 9); | |
1541 | ||
1542 | ||
1543 | /* indirect blocks */ | |
1544 | meta_blocks = 1; | |
1545 | /* double indirect blocks */ | |
1546 | meta_blocks += 1 + (1LL << (bits-2)); | |
1547 | /* tripple indirect blocks */ | |
1548 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1549 | ||
1550 | upper_limit -= meta_blocks; | |
1551 | upper_limit <<= bits; | |
1da177e4 LT |
1552 | |
1553 | res += 1LL << (bits-2); | |
1554 | res += 1LL << (2*(bits-2)); | |
1555 | res += 1LL << (3*(bits-2)); | |
1556 | res <<= bits; | |
1557 | if (res > upper_limit) | |
1558 | res = upper_limit; | |
fe7fdc37 AK |
1559 | |
1560 | if (res > MAX_LFS_FILESIZE) | |
1561 | res = MAX_LFS_FILESIZE; | |
1562 | ||
1da177e4 LT |
1563 | return res; |
1564 | } | |
1565 | ||
43d23f90 MC |
1566 | static ext3_fsblk_t descriptor_loc(struct super_block *sb, |
1567 | ext3_fsblk_t logic_sb_block, | |
1da177e4 LT |
1568 | int nr) |
1569 | { | |
1570 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 1571 | unsigned long bg, first_meta_bg; |
1da177e4 LT |
1572 | int has_super = 0; |
1573 | ||
1da177e4 LT |
1574 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); |
1575 | ||
1576 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) || | |
1577 | nr < first_meta_bg) | |
1578 | return (logic_sb_block + nr + 1); | |
1579 | bg = sbi->s_desc_per_block * nr; | |
1580 | if (ext3_bg_has_super(sb, bg)) | |
1581 | has_super = 1; | |
43d23f90 | 1582 | return (has_super + ext3_group_first_block_no(sb, bg)); |
1da177e4 LT |
1583 | } |
1584 | ||
1585 | ||
1586 | static int ext3_fill_super (struct super_block *sb, void *data, int silent) | |
1587 | { | |
1588 | struct buffer_head * bh; | |
1589 | struct ext3_super_block *es = NULL; | |
1590 | struct ext3_sb_info *sbi; | |
43d23f90 | 1591 | ext3_fsblk_t block; |
4cf46b67 | 1592 | ext3_fsblk_t sb_block = get_sb_block(&data, sb); |
43d23f90 | 1593 | ext3_fsblk_t logic_sb_block; |
1da177e4 | 1594 | unsigned long offset = 0; |
eee194e7 | 1595 | unsigned int journal_inum = 0; |
71b96257 | 1596 | unsigned long journal_devnum = 0; |
1da177e4 LT |
1597 | unsigned long def_mount_opts; |
1598 | struct inode *root; | |
1599 | int blocksize; | |
1600 | int hblock; | |
1601 | int db_count; | |
1602 | int i; | |
1603 | int needs_recovery; | |
473043dc | 1604 | int ret = -EINVAL; |
1da177e4 | 1605 | __le32 features; |
833f4077 | 1606 | int err; |
1da177e4 | 1607 | |
f8314dc6 | 1608 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
1609 | if (!sbi) |
1610 | return -ENOMEM; | |
5df096d6 PE |
1611 | |
1612 | sbi->s_blockgroup_lock = | |
1613 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
1614 | if (!sbi->s_blockgroup_lock) { | |
1615 | kfree(sbi); | |
1616 | return -ENOMEM; | |
1617 | } | |
1da177e4 | 1618 | sb->s_fs_info = sbi; |
1da177e4 LT |
1619 | sbi->s_mount_opt = 0; |
1620 | sbi->s_resuid = EXT3_DEF_RESUID; | |
1621 | sbi->s_resgid = EXT3_DEF_RESGID; | |
571beed8 | 1622 | sbi->s_sb_block = sb_block; |
1da177e4 | 1623 | |
1da177e4 LT |
1624 | blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); |
1625 | if (!blocksize) { | |
4cf46b67 | 1626 | ext3_msg(sb, KERN_ERR, "error: unable to set blocksize"); |
1da177e4 LT |
1627 | goto out_fail; |
1628 | } | |
1629 | ||
1630 | /* | |
1631 | * The ext3 superblock will not be buffer aligned for other than 1kB | |
1632 | * block sizes. We need to calculate the offset from buffer start. | |
1633 | */ | |
1634 | if (blocksize != EXT3_MIN_BLOCK_SIZE) { | |
1635 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; | |
1636 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1637 | } else { | |
1638 | logic_sb_block = sb_block; | |
1639 | } | |
1640 | ||
1641 | if (!(bh = sb_bread(sb, logic_sb_block))) { | |
4cf46b67 | 1642 | ext3_msg(sb, KERN_ERR, "error: unable to read superblock"); |
1da177e4 LT |
1643 | goto out_fail; |
1644 | } | |
1645 | /* | |
1646 | * Note: s_es must be initialized as soon as possible because | |
1647 | * some ext3 macro-instructions depend on its value | |
1648 | */ | |
57e94d86 | 1649 | es = (struct ext3_super_block *) (bh->b_data + offset); |
1da177e4 LT |
1650 | sbi->s_es = es; |
1651 | sb->s_magic = le16_to_cpu(es->s_magic); | |
1652 | if (sb->s_magic != EXT3_SUPER_MAGIC) | |
1653 | goto cantfind_ext3; | |
1654 | ||
1655 | /* Set defaults before we parse the mount options */ | |
1656 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
1657 | if (def_mount_opts & EXT3_DEFM_DEBUG) | |
1658 | set_opt(sbi->s_mount_opt, DEBUG); | |
1659 | if (def_mount_opts & EXT3_DEFM_BSDGROUPS) | |
1660 | set_opt(sbi->s_mount_opt, GRPID); | |
1661 | if (def_mount_opts & EXT3_DEFM_UID16) | |
1662 | set_opt(sbi->s_mount_opt, NO_UID32); | |
2e7842b8 | 1663 | #ifdef CONFIG_EXT3_FS_XATTR |
1da177e4 LT |
1664 | if (def_mount_opts & EXT3_DEFM_XATTR_USER) |
1665 | set_opt(sbi->s_mount_opt, XATTR_USER); | |
2e7842b8 HD |
1666 | #endif |
1667 | #ifdef CONFIG_EXT3_FS_POSIX_ACL | |
1da177e4 LT |
1668 | if (def_mount_opts & EXT3_DEFM_ACL) |
1669 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
2e7842b8 | 1670 | #endif |
1da177e4 | 1671 | if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA) |
e3c96435 | 1672 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
1da177e4 | 1673 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED) |
e3c96435 | 1674 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
1da177e4 | 1675 | else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK) |
e3c96435 | 1676 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
1da177e4 LT |
1677 | |
1678 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC) | |
1679 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1eca93f9 | 1680 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE) |
2245d7c2 | 1681 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
1eca93f9 AK |
1682 | else |
1683 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
1da177e4 LT |
1684 | |
1685 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
1686 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
1687 | ||
1688 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1689 | ||
71b96257 JL |
1690 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
1691 | NULL, 0)) | |
1da177e4 LT |
1692 | goto failed_mount; |
1693 | ||
1694 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
e3c96435 | 1695 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
1da177e4 LT |
1696 | |
1697 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV && | |
1698 | (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1699 | EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1700 | EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
4cf46b67 AF |
1701 | ext3_msg(sb, KERN_WARNING, |
1702 | "warning: feature flags set on rev 0 fs, " | |
1703 | "running e2fsck is recommended"); | |
1da177e4 LT |
1704 | /* |
1705 | * Check feature flags regardless of the revision level, since we | |
1706 | * previously didn't change the revision level when setting the flags, | |
1707 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
1708 | */ | |
1709 | features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP); | |
1710 | if (features) { | |
4cf46b67 AF |
1711 | ext3_msg(sb, KERN_ERR, |
1712 | "error: couldn't mount because of unsupported " | |
1713 | "optional features (%x)", le32_to_cpu(features)); | |
1da177e4 LT |
1714 | goto failed_mount; |
1715 | } | |
1716 | features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP); | |
1717 | if (!(sb->s_flags & MS_RDONLY) && features) { | |
4cf46b67 AF |
1718 | ext3_msg(sb, KERN_ERR, |
1719 | "error: couldn't mount RDWR because of unsupported " | |
1720 | "optional features (%x)", le32_to_cpu(features)); | |
1da177e4 LT |
1721 | goto failed_mount; |
1722 | } | |
1723 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
1724 | ||
1725 | if (blocksize < EXT3_MIN_BLOCK_SIZE || | |
1726 | blocksize > EXT3_MAX_BLOCK_SIZE) { | |
4cf46b67 AF |
1727 | ext3_msg(sb, KERN_ERR, |
1728 | "error: couldn't mount because of unsupported " | |
1729 | "filesystem blocksize %d", blocksize); | |
1da177e4 LT |
1730 | goto failed_mount; |
1731 | } | |
1732 | ||
e1defc4f | 1733 | hblock = bdev_logical_block_size(sb->s_bdev); |
1da177e4 LT |
1734 | if (sb->s_blocksize != blocksize) { |
1735 | /* | |
1736 | * Make sure the blocksize for the filesystem is larger | |
1737 | * than the hardware sectorsize for the machine. | |
1738 | */ | |
1739 | if (blocksize < hblock) { | |
4cf46b67 AF |
1740 | ext3_msg(sb, KERN_ERR, |
1741 | "error: fsblocksize %d too small for " | |
1742 | "hardware sectorsize %d", blocksize, hblock); | |
1da177e4 LT |
1743 | goto failed_mount; |
1744 | } | |
1745 | ||
1746 | brelse (bh); | |
0f0a89eb | 1747 | if (!sb_set_blocksize(sb, blocksize)) { |
4cf46b67 AF |
1748 | ext3_msg(sb, KERN_ERR, |
1749 | "error: bad blocksize %d", blocksize); | |
0f0a89eb TS |
1750 | goto out_fail; |
1751 | } | |
1da177e4 LT |
1752 | logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize; |
1753 | offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize; | |
1754 | bh = sb_bread(sb, logic_sb_block); | |
1755 | if (!bh) { | |
4cf46b67 AF |
1756 | ext3_msg(sb, KERN_ERR, |
1757 | "error: can't read superblock on 2nd try"); | |
1da177e4 LT |
1758 | goto failed_mount; |
1759 | } | |
57e94d86 | 1760 | es = (struct ext3_super_block *)(bh->b_data + offset); |
1da177e4 LT |
1761 | sbi->s_es = es; |
1762 | if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) { | |
4cf46b67 AF |
1763 | ext3_msg(sb, KERN_ERR, |
1764 | "error: magic mismatch"); | |
1da177e4 LT |
1765 | goto failed_mount; |
1766 | } | |
1767 | } | |
1768 | ||
1769 | sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits); | |
1770 | ||
1771 | if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) { | |
1772 | sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE; | |
1773 | sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO; | |
1774 | } else { | |
1775 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
1776 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
1777 | if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) || | |
3fc74269 | 1778 | (!is_power_of_2(sbi->s_inode_size)) || |
1da177e4 | 1779 | (sbi->s_inode_size > blocksize)) { |
4cf46b67 AF |
1780 | ext3_msg(sb, KERN_ERR, |
1781 | "error: unsupported inode size: %d", | |
1da177e4 LT |
1782 | sbi->s_inode_size); |
1783 | goto failed_mount; | |
1784 | } | |
1785 | } | |
1786 | sbi->s_frag_size = EXT3_MIN_FRAG_SIZE << | |
1787 | le32_to_cpu(es->s_log_frag_size); | |
1788 | if (blocksize != sbi->s_frag_size) { | |
4cf46b67 AF |
1789 | ext3_msg(sb, KERN_ERR, |
1790 | "error: fragsize %lu != blocksize %u (unsupported)", | |
1da177e4 LT |
1791 | sbi->s_frag_size, blocksize); |
1792 | goto failed_mount; | |
1793 | } | |
1794 | sbi->s_frags_per_block = 1; | |
1795 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); | |
1796 | sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); | |
1797 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); | |
b47b6f38 | 1798 | if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0) |
1da177e4 LT |
1799 | goto cantfind_ext3; |
1800 | sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb); | |
1801 | if (sbi->s_inodes_per_block == 0) | |
1802 | goto cantfind_ext3; | |
1803 | sbi->s_itb_per_group = sbi->s_inodes_per_group / | |
1804 | sbi->s_inodes_per_block; | |
1805 | sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc); | |
1806 | sbi->s_sbh = bh; | |
1807 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
f0d1b0b3 DH |
1808 | sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb)); |
1809 | sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb)); | |
1da177e4 LT |
1810 | for (i=0; i < 4; i++) |
1811 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
1812 | sbi->s_def_hash_version = es->s_def_hash_version; | |
5e1f8c9e TT |
1813 | i = le32_to_cpu(es->s_flags); |
1814 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
1815 | sbi->s_hash_unsigned = 3; | |
1816 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
1817 | #ifdef __CHAR_UNSIGNED__ | |
1818 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
1819 | sbi->s_hash_unsigned = 3; | |
1820 | #else | |
1821 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
1822 | #endif | |
5e1f8c9e | 1823 | } |
1da177e4 LT |
1824 | |
1825 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
4cf46b67 AF |
1826 | ext3_msg(sb, KERN_ERR, |
1827 | "#blocks per group too big: %lu", | |
1da177e4 LT |
1828 | sbi->s_blocks_per_group); |
1829 | goto failed_mount; | |
1830 | } | |
1831 | if (sbi->s_frags_per_group > blocksize * 8) { | |
4cf46b67 AF |
1832 | ext3_msg(sb, KERN_ERR, |
1833 | "error: #fragments per group too big: %lu", | |
1da177e4 LT |
1834 | sbi->s_frags_per_group); |
1835 | goto failed_mount; | |
1836 | } | |
1837 | if (sbi->s_inodes_per_group > blocksize * 8) { | |
4cf46b67 AF |
1838 | ext3_msg(sb, KERN_ERR, |
1839 | "error: #inodes per group too big: %lu", | |
1da177e4 LT |
1840 | sbi->s_inodes_per_group); |
1841 | goto failed_mount; | |
1842 | } | |
1843 | ||
30ca22c7 PL |
1844 | if (generic_check_addressable(sb->s_blocksize_bits, |
1845 | le32_to_cpu(es->s_blocks_count))) { | |
4cf46b67 AF |
1846 | ext3_msg(sb, KERN_ERR, |
1847 | "error: filesystem is too large to mount safely"); | |
fcd5df35 | 1848 | if (sizeof(sector_t) < 8) |
4cf46b67 AF |
1849 | ext3_msg(sb, KERN_ERR, |
1850 | "error: CONFIG_LBDAF not enabled"); | |
fcd5df35 MC |
1851 | goto failed_mount; |
1852 | } | |
1853 | ||
1da177e4 LT |
1854 | if (EXT3_BLOCKS_PER_GROUP(sb) == 0) |
1855 | goto cantfind_ext3; | |
855565e8 ES |
1856 | sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - |
1857 | le32_to_cpu(es->s_first_data_block) - 1) | |
1858 | / EXT3_BLOCKS_PER_GROUP(sb)) + 1; | |
81a4e320 | 1859 | db_count = DIV_ROUND_UP(sbi->s_groups_count, EXT3_DESC_PER_BLOCK(sb)); |
1da177e4 LT |
1860 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), |
1861 | GFP_KERNEL); | |
1862 | if (sbi->s_group_desc == NULL) { | |
4cf46b67 AF |
1863 | ext3_msg(sb, KERN_ERR, |
1864 | "error: not enough memory"); | |
4569cd1b | 1865 | ret = -ENOMEM; |
1da177e4 LT |
1866 | goto failed_mount; |
1867 | } | |
1868 | ||
5df096d6 | 1869 | bgl_lock_init(sbi->s_blockgroup_lock); |
1da177e4 LT |
1870 | |
1871 | for (i = 0; i < db_count; i++) { | |
1872 | block = descriptor_loc(sb, logic_sb_block, i); | |
1873 | sbi->s_group_desc[i] = sb_bread(sb, block); | |
1874 | if (!sbi->s_group_desc[i]) { | |
4cf46b67 AF |
1875 | ext3_msg(sb, KERN_ERR, |
1876 | "error: can't read group descriptor %d", i); | |
1da177e4 LT |
1877 | db_count = i; |
1878 | goto failed_mount2; | |
1879 | } | |
1880 | } | |
1881 | if (!ext3_check_descriptors (sb)) { | |
4cf46b67 AF |
1882 | ext3_msg(sb, KERN_ERR, |
1883 | "error: group descriptors corrupted"); | |
1da177e4 LT |
1884 | goto failed_mount2; |
1885 | } | |
1886 | sbi->s_gdb_count = db_count; | |
1887 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1888 | spin_lock_init(&sbi->s_next_gen_lock); | |
0216bfcf | 1889 | |
1da177e4 LT |
1890 | /* per fileystem reservation list head & lock */ |
1891 | spin_lock_init(&sbi->s_rsv_window_lock); | |
1892 | sbi->s_rsv_window_root = RB_ROOT; | |
1893 | /* Add a single, static dummy reservation to the start of the | |
1894 | * reservation window list --- it gives us a placeholder for | |
1895 | * append-at-start-of-list which makes the allocation logic | |
1896 | * _much_ simpler. */ | |
1897 | sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1898 | sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED; | |
1899 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; | |
1900 | sbi->s_rsv_window_head.rsv_goal_size = 0; | |
1901 | ext3_rsv_window_add(sb, &sbi->s_rsv_window_head); | |
1902 | ||
1903 | /* | |
1904 | * set up enough so that it can read an inode | |
1905 | */ | |
1906 | sb->s_op = &ext3_sops; | |
1907 | sb->s_export_op = &ext3_export_ops; | |
1908 | sb->s_xattr = ext3_xattr_handlers; | |
1909 | #ifdef CONFIG_QUOTA | |
1910 | sb->s_qcop = &ext3_qctl_operations; | |
1911 | sb->dq_op = &ext3_quota_operations; | |
1912 | #endif | |
1913 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
b8a052d0 | 1914 | mutex_init(&sbi->s_orphan_lock); |
96d2a495 | 1915 | mutex_init(&sbi->s_resize_lock); |
1da177e4 LT |
1916 | |
1917 | sb->s_root = NULL; | |
1918 | ||
1919 | needs_recovery = (es->s_last_orphan != 0 || | |
1920 | EXT3_HAS_INCOMPAT_FEATURE(sb, | |
1921 | EXT3_FEATURE_INCOMPAT_RECOVER)); | |
1922 | ||
1923 | /* | |
1924 | * The first inode we look at is the journal inode. Don't try | |
1925 | * root first: it may be modified in the journal! | |
1926 | */ | |
1927 | if (!test_opt(sb, NOLOAD) && | |
1928 | EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { | |
71b96257 | 1929 | if (ext3_load_journal(sb, es, journal_devnum)) |
41d1a636 | 1930 | goto failed_mount2; |
1da177e4 LT |
1931 | } else if (journal_inum) { |
1932 | if (ext3_create_journal(sb, es, journal_inum)) | |
41d1a636 | 1933 | goto failed_mount2; |
1da177e4 LT |
1934 | } else { |
1935 | if (!silent) | |
4cf46b67 AF |
1936 | ext3_msg(sb, KERN_ERR, |
1937 | "error: no journal found. " | |
1938 | "mounting ext3 over ext2?"); | |
41d1a636 DM |
1939 | goto failed_mount2; |
1940 | } | |
1941 | err = percpu_counter_init(&sbi->s_freeblocks_counter, | |
1942 | ext3_count_free_blocks(sb)); | |
1943 | if (!err) { | |
1944 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
1945 | ext3_count_free_inodes(sb)); | |
1946 | } | |
1947 | if (!err) { | |
1948 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
1949 | ext3_count_dirs(sb)); | |
1950 | } | |
1951 | if (err) { | |
1952 | ext3_msg(sb, KERN_ERR, "error: insufficient memory"); | |
4569cd1b | 1953 | ret = err; |
0216bfcf | 1954 | goto failed_mount3; |
1da177e4 LT |
1955 | } |
1956 | ||
1957 | /* We have now updated the journal if required, so we can | |
1958 | * validate the data journaling mode. */ | |
1959 | switch (test_opt(sb, DATA_FLAGS)) { | |
1960 | case 0: | |
1961 | /* No mode set, assume a default based on the journal | |
1962 | capabilities: ORDERED_DATA if the journal can | |
1963 | cope, else JOURNAL_DATA */ | |
1964 | if (journal_check_available_features | |
1965 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) | |
bbae8bcc | 1966 | set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE); |
1da177e4 LT |
1967 | else |
1968 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
1969 | break; | |
1970 | ||
1971 | case EXT3_MOUNT_ORDERED_DATA: | |
1972 | case EXT3_MOUNT_WRITEBACK_DATA: | |
1973 | if (!journal_check_available_features | |
1974 | (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) { | |
4cf46b67 AF |
1975 | ext3_msg(sb, KERN_ERR, |
1976 | "error: journal does not support " | |
1977 | "requested data journaling mode"); | |
41d1a636 | 1978 | goto failed_mount3; |
1da177e4 LT |
1979 | } |
1980 | default: | |
1981 | break; | |
1982 | } | |
1983 | ||
1da177e4 LT |
1984 | /* |
1985 | * The journal_load will have done any necessary log recovery, | |
1986 | * so we can safely mount the rest of the filesystem now. | |
1987 | */ | |
1988 | ||
473043dc DH |
1989 | root = ext3_iget(sb, EXT3_ROOT_INO); |
1990 | if (IS_ERR(root)) { | |
4cf46b67 | 1991 | ext3_msg(sb, KERN_ERR, "error: get root inode failed"); |
473043dc | 1992 | ret = PTR_ERR(root); |
41d1a636 | 1993 | goto failed_mount3; |
1da177e4 LT |
1994 | } |
1995 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
473043dc | 1996 | iput(root); |
4cf46b67 | 1997 | ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck"); |
41d1a636 | 1998 | goto failed_mount3; |
1da177e4 | 1999 | } |
473043dc DH |
2000 | sb->s_root = d_alloc_root(root); |
2001 | if (!sb->s_root) { | |
4cf46b67 | 2002 | ext3_msg(sb, KERN_ERR, "error: get root dentry failed"); |
473043dc DH |
2003 | iput(root); |
2004 | ret = -ENOMEM; | |
41d1a636 | 2005 | goto failed_mount3; |
473043dc | 2006 | } |
1da177e4 LT |
2007 | |
2008 | ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY); | |
ed505ee4 | 2009 | |
1da177e4 LT |
2010 | EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS; |
2011 | ext3_orphan_cleanup(sb, es); | |
2012 | EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS; | |
2013 | if (needs_recovery) | |
4cf46b67 | 2014 | ext3_msg(sb, KERN_INFO, "recovery complete"); |
1da177e4 | 2015 | ext3_mark_recovery_complete(sb, es); |
4cf46b67 | 2016 | ext3_msg(sb, KERN_INFO, "mounted filesystem with %s data mode", |
1da177e4 LT |
2017 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal": |
2018 | test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered": | |
2019 | "writeback"); | |
2020 | ||
1da177e4 LT |
2021 | return 0; |
2022 | ||
2023 | cantfind_ext3: | |
2024 | if (!silent) | |
4cf46b67 AF |
2025 | ext3_msg(sb, KERN_INFO, |
2026 | "error: can't find ext3 filesystem on dev %s.", | |
1da177e4 LT |
2027 | sb->s_id); |
2028 | goto failed_mount; | |
2029 | ||
0216bfcf MC |
2030 | failed_mount3: |
2031 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2032 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2033 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
41d1a636 | 2034 | journal_destroy(sbi->s_journal); |
1da177e4 LT |
2035 | failed_mount2: |
2036 | for (i = 0; i < db_count; i++) | |
2037 | brelse(sbi->s_group_desc[i]); | |
2038 | kfree(sbi->s_group_desc); | |
2039 | failed_mount: | |
2040 | #ifdef CONFIG_QUOTA | |
2041 | for (i = 0; i < MAXQUOTAS; i++) | |
2042 | kfree(sbi->s_qf_names[i]); | |
2043 | #endif | |
2044 | ext3_blkdev_remove(sbi); | |
2045 | brelse(bh); | |
2046 | out_fail: | |
2047 | sb->s_fs_info = NULL; | |
de5ce037 | 2048 | kfree(sbi->s_blockgroup_lock); |
1da177e4 | 2049 | kfree(sbi); |
473043dc | 2050 | return ret; |
1da177e4 LT |
2051 | } |
2052 | ||
2053 | /* | |
2054 | * Setup any per-fs journal parameters now. We'll do this both on | |
2055 | * initial mount, once the journal has been initialised but before we've | |
ae6ddcc5 | 2056 | * done any recovery; and again on any subsequent remount. |
1da177e4 LT |
2057 | */ |
2058 | static void ext3_init_journal_params(struct super_block *sb, journal_t *journal) | |
2059 | { | |
2060 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
2061 | ||
2062 | if (sbi->s_commit_interval) | |
2063 | journal->j_commit_interval = sbi->s_commit_interval; | |
2064 | /* We could also set up an ext3-specific default for the commit | |
2065 | * interval here, but for now we'll just fall back to the jbd | |
2066 | * default. */ | |
2067 | ||
2068 | spin_lock(&journal->j_state_lock); | |
2069 | if (test_opt(sb, BARRIER)) | |
2070 | journal->j_flags |= JFS_BARRIER; | |
2071 | else | |
2072 | journal->j_flags &= ~JFS_BARRIER; | |
0e4fb5e2 HK |
2073 | if (test_opt(sb, DATA_ERR_ABORT)) |
2074 | journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR; | |
2075 | else | |
2076 | journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR; | |
1da177e4 LT |
2077 | spin_unlock(&journal->j_state_lock); |
2078 | } | |
2079 | ||
eee194e7 ES |
2080 | static journal_t *ext3_get_journal(struct super_block *sb, |
2081 | unsigned int journal_inum) | |
1da177e4 LT |
2082 | { |
2083 | struct inode *journal_inode; | |
2084 | journal_t *journal; | |
2085 | ||
2086 | /* First, test for the existence of a valid inode on disk. Bad | |
2087 | * things happen if we iget() an unused inode, as the subsequent | |
2088 | * iput() will try to delete it. */ | |
2089 | ||
473043dc DH |
2090 | journal_inode = ext3_iget(sb, journal_inum); |
2091 | if (IS_ERR(journal_inode)) { | |
4cf46b67 | 2092 | ext3_msg(sb, KERN_ERR, "error: no journal found"); |
1da177e4 LT |
2093 | return NULL; |
2094 | } | |
2095 | if (!journal_inode->i_nlink) { | |
2096 | make_bad_inode(journal_inode); | |
2097 | iput(journal_inode); | |
4cf46b67 | 2098 | ext3_msg(sb, KERN_ERR, "error: journal inode is deleted"); |
1da177e4 LT |
2099 | return NULL; |
2100 | } | |
2101 | ||
2102 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", | |
2103 | journal_inode, journal_inode->i_size); | |
473043dc | 2104 | if (!S_ISREG(journal_inode->i_mode)) { |
4cf46b67 | 2105 | ext3_msg(sb, KERN_ERR, "error: invalid journal inode"); |
1da177e4 LT |
2106 | iput(journal_inode); |
2107 | return NULL; | |
2108 | } | |
2109 | ||
2110 | journal = journal_init_inode(journal_inode); | |
2111 | if (!journal) { | |
4cf46b67 | 2112 | ext3_msg(sb, KERN_ERR, "error: could not load journal inode"); |
1da177e4 LT |
2113 | iput(journal_inode); |
2114 | return NULL; | |
2115 | } | |
2116 | journal->j_private = sb; | |
2117 | ext3_init_journal_params(sb, journal); | |
2118 | return journal; | |
2119 | } | |
2120 | ||
2121 | static journal_t *ext3_get_dev_journal(struct super_block *sb, | |
2122 | dev_t j_dev) | |
2123 | { | |
2124 | struct buffer_head * bh; | |
2125 | journal_t *journal; | |
43d23f90 | 2126 | ext3_fsblk_t start; |
1c2bf374 | 2127 | ext3_fsblk_t len; |
1da177e4 | 2128 | int hblock, blocksize; |
43d23f90 | 2129 | ext3_fsblk_t sb_block; |
1da177e4 LT |
2130 | unsigned long offset; |
2131 | struct ext3_super_block * es; | |
2132 | struct block_device *bdev; | |
2133 | ||
4cf46b67 | 2134 | bdev = ext3_blkdev_get(j_dev, sb); |
1da177e4 LT |
2135 | if (bdev == NULL) |
2136 | return NULL; | |
2137 | ||
2138 | if (bd_claim(bdev, sb)) { | |
4cf46b67 AF |
2139 | ext3_msg(sb, KERN_ERR, |
2140 | "error: failed to claim external journal device"); | |
9a1c3542 | 2141 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
1da177e4 LT |
2142 | return NULL; |
2143 | } | |
2144 | ||
2145 | blocksize = sb->s_blocksize; | |
e1defc4f | 2146 | hblock = bdev_logical_block_size(bdev); |
1da177e4 | 2147 | if (blocksize < hblock) { |
4cf46b67 AF |
2148 | ext3_msg(sb, KERN_ERR, |
2149 | "error: blocksize too small for journal device"); | |
1da177e4 LT |
2150 | goto out_bdev; |
2151 | } | |
2152 | ||
2153 | sb_block = EXT3_MIN_BLOCK_SIZE / blocksize; | |
2154 | offset = EXT3_MIN_BLOCK_SIZE % blocksize; | |
2155 | set_blocksize(bdev, blocksize); | |
2156 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
4cf46b67 AF |
2157 | ext3_msg(sb, KERN_ERR, "error: couldn't read superblock of " |
2158 | "external journal"); | |
1da177e4 LT |
2159 | goto out_bdev; |
2160 | } | |
2161 | ||
57e94d86 | 2162 | es = (struct ext3_super_block *) (bh->b_data + offset); |
1da177e4 LT |
2163 | if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) || |
2164 | !(le32_to_cpu(es->s_feature_incompat) & | |
2165 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
4cf46b67 AF |
2166 | ext3_msg(sb, KERN_ERR, "error: external journal has " |
2167 | "bad superblock"); | |
1da177e4 LT |
2168 | brelse(bh); |
2169 | goto out_bdev; | |
2170 | } | |
2171 | ||
2172 | if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { | |
4cf46b67 | 2173 | ext3_msg(sb, KERN_ERR, "error: journal UUID does not match"); |
1da177e4 LT |
2174 | brelse(bh); |
2175 | goto out_bdev; | |
2176 | } | |
2177 | ||
2178 | len = le32_to_cpu(es->s_blocks_count); | |
2179 | start = sb_block + 1; | |
2180 | brelse(bh); /* we're done with the superblock */ | |
2181 | ||
2182 | journal = journal_init_dev(bdev, sb->s_bdev, | |
2183 | start, len, blocksize); | |
2184 | if (!journal) { | |
4cf46b67 AF |
2185 | ext3_msg(sb, KERN_ERR, |
2186 | "error: failed to create device journal"); | |
1da177e4 LT |
2187 | goto out_bdev; |
2188 | } | |
2189 | journal->j_private = sb; | |
2190 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2191 | wait_on_buffer(journal->j_sb_buffer); | |
2192 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
4cf46b67 | 2193 | ext3_msg(sb, KERN_ERR, "I/O error on journal device"); |
1da177e4 LT |
2194 | goto out_journal; |
2195 | } | |
2196 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
4cf46b67 AF |
2197 | ext3_msg(sb, KERN_ERR, |
2198 | "error: external journal has more than one " | |
2199 | "user (unsupported) - %d", | |
1da177e4 LT |
2200 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
2201 | goto out_journal; | |
2202 | } | |
2203 | EXT3_SB(sb)->journal_bdev = bdev; | |
2204 | ext3_init_journal_params(sb, journal); | |
2205 | return journal; | |
2206 | out_journal: | |
2207 | journal_destroy(journal); | |
2208 | out_bdev: | |
2209 | ext3_blkdev_put(bdev); | |
2210 | return NULL; | |
2211 | } | |
2212 | ||
71b96257 JL |
2213 | static int ext3_load_journal(struct super_block *sb, |
2214 | struct ext3_super_block *es, | |
2215 | unsigned long journal_devnum) | |
1da177e4 LT |
2216 | { |
2217 | journal_t *journal; | |
eee194e7 | 2218 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); |
71b96257 | 2219 | dev_t journal_dev; |
1da177e4 LT |
2220 | int err = 0; |
2221 | int really_read_only; | |
2222 | ||
71b96257 JL |
2223 | if (journal_devnum && |
2224 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
4cf46b67 AF |
2225 | ext3_msg(sb, KERN_INFO, "external journal device major/minor " |
2226 | "numbers have changed"); | |
71b96257 JL |
2227 | journal_dev = new_decode_dev(journal_devnum); |
2228 | } else | |
2229 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2230 | ||
1da177e4 LT |
2231 | really_read_only = bdev_read_only(sb->s_bdev); |
2232 | ||
2233 | /* | |
2234 | * Are we loading a blank journal or performing recovery after a | |
2235 | * crash? For recovery, we need to check in advance whether we | |
2236 | * can get read-write access to the device. | |
2237 | */ | |
2238 | ||
2239 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) { | |
2240 | if (sb->s_flags & MS_RDONLY) { | |
4cf46b67 AF |
2241 | ext3_msg(sb, KERN_INFO, |
2242 | "recovery required on readonly filesystem"); | |
1da177e4 | 2243 | if (really_read_only) { |
4cf46b67 AF |
2244 | ext3_msg(sb, KERN_ERR, "error: write access " |
2245 | "unavailable, cannot proceed"); | |
1da177e4 LT |
2246 | return -EROFS; |
2247 | } | |
4cf46b67 AF |
2248 | ext3_msg(sb, KERN_INFO, |
2249 | "write access will be enabled during recovery"); | |
1da177e4 LT |
2250 | } |
2251 | } | |
2252 | ||
2253 | if (journal_inum && journal_dev) { | |
4cf46b67 AF |
2254 | ext3_msg(sb, KERN_ERR, "error: filesystem has both journal " |
2255 | "and inode journals"); | |
1da177e4 LT |
2256 | return -EINVAL; |
2257 | } | |
2258 | ||
2259 | if (journal_inum) { | |
2260 | if (!(journal = ext3_get_journal(sb, journal_inum))) | |
2261 | return -EINVAL; | |
2262 | } else { | |
2263 | if (!(journal = ext3_get_dev_journal(sb, journal_dev))) | |
2264 | return -EINVAL; | |
2265 | } | |
2266 | ||
0636c73e ES |
2267 | if (!(journal->j_flags & JFS_BARRIER)) |
2268 | printk(KERN_INFO "EXT3-fs: barriers not enabled\n"); | |
2269 | ||
1da177e4 LT |
2270 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
2271 | err = journal_update_format(journal); | |
2272 | if (err) { | |
4cf46b67 | 2273 | ext3_msg(sb, KERN_ERR, "error updating journal"); |
1da177e4 LT |
2274 | journal_destroy(journal); |
2275 | return err; | |
2276 | } | |
2277 | } | |
2278 | ||
2279 | if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) | |
2280 | err = journal_wipe(journal, !really_read_only); | |
2281 | if (!err) | |
2282 | err = journal_load(journal); | |
2283 | ||
2284 | if (err) { | |
4cf46b67 | 2285 | ext3_msg(sb, KERN_ERR, "error loading journal"); |
1da177e4 LT |
2286 | journal_destroy(journal); |
2287 | return err; | |
2288 | } | |
2289 | ||
2290 | EXT3_SB(sb)->s_journal = journal; | |
2291 | ext3_clear_journal_err(sb, es); | |
71b96257 | 2292 | |
31d710a7 | 2293 | if (!really_read_only && journal_devnum && |
71b96257 JL |
2294 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
2295 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
71b96257 JL |
2296 | |
2297 | /* Make sure we flush the recovery flag to disk. */ | |
2298 | ext3_commit_super(sb, es, 1); | |
2299 | } | |
2300 | ||
1da177e4 LT |
2301 | return 0; |
2302 | } | |
2303 | ||
4cf46b67 AF |
2304 | static int ext3_create_journal(struct super_block *sb, |
2305 | struct ext3_super_block *es, | |
eee194e7 | 2306 | unsigned int journal_inum) |
1da177e4 LT |
2307 | { |
2308 | journal_t *journal; | |
952d9de1 | 2309 | int err; |
1da177e4 LT |
2310 | |
2311 | if (sb->s_flags & MS_RDONLY) { | |
4cf46b67 AF |
2312 | ext3_msg(sb, KERN_ERR, |
2313 | "error: readonly filesystem when trying to " | |
2314 | "create journal"); | |
1da177e4 LT |
2315 | return -EROFS; |
2316 | } | |
2317 | ||
952d9de1 BP |
2318 | journal = ext3_get_journal(sb, journal_inum); |
2319 | if (!journal) | |
1da177e4 LT |
2320 | return -EINVAL; |
2321 | ||
4cf46b67 | 2322 | ext3_msg(sb, KERN_INFO, "creating new journal on inode %u", |
1da177e4 LT |
2323 | journal_inum); |
2324 | ||
952d9de1 BP |
2325 | err = journal_create(journal); |
2326 | if (err) { | |
4cf46b67 | 2327 | ext3_msg(sb, KERN_ERR, "error creating journal"); |
1da177e4 LT |
2328 | journal_destroy(journal); |
2329 | return -EIO; | |
2330 | } | |
2331 | ||
2332 | EXT3_SB(sb)->s_journal = journal; | |
2333 | ||
2334 | ext3_update_dynamic_rev(sb); | |
2335 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2336 | EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL); | |
2337 | ||
2338 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
1da177e4 LT |
2339 | |
2340 | /* Make sure we flush the recovery flag to disk. */ | |
2341 | ext3_commit_super(sb, es, 1); | |
2342 | ||
2343 | return 0; | |
2344 | } | |
2345 | ||
c4be0c1d TS |
2346 | static int ext3_commit_super(struct super_block *sb, |
2347 | struct ext3_super_block *es, | |
1da177e4 LT |
2348 | int sync) |
2349 | { | |
2350 | struct buffer_head *sbh = EXT3_SB(sb)->s_sbh; | |
c4be0c1d | 2351 | int error = 0; |
1da177e4 LT |
2352 | |
2353 | if (!sbh) | |
c4be0c1d | 2354 | return error; |
dff6825e DW |
2355 | |
2356 | if (buffer_write_io_error(sbh)) { | |
2357 | /* | |
2358 | * Oh, dear. A previous attempt to write the | |
2359 | * superblock failed. This could happen because the | |
2360 | * USB device was yanked out. Or it could happen to | |
2361 | * be a transient write error and maybe the block will | |
2362 | * be remapped. Nothing we can do but to retry the | |
2363 | * write and hope for the best. | |
2364 | */ | |
2365 | ext3_msg(sb, KERN_ERR, "previous I/O error to " | |
2366 | "superblock detected"); | |
2367 | clear_buffer_write_io_error(sbh); | |
2368 | set_buffer_uptodate(sbh); | |
2369 | } | |
96ec2e0a TT |
2370 | /* |
2371 | * If the file system is mounted read-only, don't update the | |
2372 | * superblock write time. This avoids updating the superblock | |
2373 | * write time when we are mounting the root file system | |
2374 | * read/only but we need to replay the journal; at that point, | |
2375 | * for people who are east of GMT and who make their clock | |
2376 | * tick in localtime for Windows bug-for-bug compatibility, | |
2377 | * the clock is set in the future, and this will cause e2fsck | |
2378 | * to complain and force a full file system check. | |
2379 | */ | |
2380 | if (!(sb->s_flags & MS_RDONLY)) | |
2381 | es->s_wtime = cpu_to_le32(get_seconds()); | |
1da177e4 LT |
2382 | es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb)); |
2383 | es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb)); | |
2384 | BUFFER_TRACE(sbh, "marking dirty"); | |
2385 | mark_buffer_dirty(sbh); | |
dff6825e | 2386 | if (sync) { |
c4be0c1d | 2387 | error = sync_dirty_buffer(sbh); |
dff6825e DW |
2388 | if (buffer_write_io_error(sbh)) { |
2389 | ext3_msg(sb, KERN_ERR, "I/O error while writing " | |
2390 | "superblock"); | |
2391 | clear_buffer_write_io_error(sbh); | |
2392 | set_buffer_uptodate(sbh); | |
2393 | } | |
2394 | } | |
c4be0c1d | 2395 | return error; |
1da177e4 LT |
2396 | } |
2397 | ||
2398 | ||
2399 | /* | |
2400 | * Have we just finished recovery? If so, and if we are mounting (or | |
2401 | * remounting) the filesystem readonly, then we will end up with a | |
2402 | * consistent fs on disk. Record that fact. | |
2403 | */ | |
2404 | static void ext3_mark_recovery_complete(struct super_block * sb, | |
2405 | struct ext3_super_block * es) | |
2406 | { | |
2407 | journal_t *journal = EXT3_SB(sb)->s_journal; | |
2408 | ||
2409 | journal_lock_updates(journal); | |
2d7c820e HK |
2410 | if (journal_flush(journal) < 0) |
2411 | goto out; | |
2412 | ||
1da177e4 LT |
2413 | if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) && |
2414 | sb->s_flags & MS_RDONLY) { | |
2415 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
1da177e4 LT |
2416 | ext3_commit_super(sb, es, 1); |
2417 | } | |
2d7c820e HK |
2418 | |
2419 | out: | |
1da177e4 LT |
2420 | journal_unlock_updates(journal); |
2421 | } | |
2422 | ||
2423 | /* | |
2424 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2425 | * has recorded an error from a previous lifetime, move that error to the | |
2426 | * main filesystem now. | |
2427 | */ | |
4cf46b67 AF |
2428 | static void ext3_clear_journal_err(struct super_block *sb, |
2429 | struct ext3_super_block *es) | |
1da177e4 LT |
2430 | { |
2431 | journal_t *journal; | |
2432 | int j_errno; | |
2433 | const char *errstr; | |
2434 | ||
2435 | journal = EXT3_SB(sb)->s_journal; | |
2436 | ||
2437 | /* | |
2438 | * Now check for any error status which may have been recorded in the | |
2439 | * journal by a prior ext3_error() or ext3_abort() | |
2440 | */ | |
2441 | ||
2442 | j_errno = journal_errno(journal); | |
2443 | if (j_errno) { | |
2444 | char nbuf[16]; | |
2445 | ||
2446 | errstr = ext3_decode_error(sb, j_errno, nbuf); | |
e05b6b52 | 2447 | ext3_warning(sb, __func__, "Filesystem error recorded " |
1da177e4 | 2448 | "from previous mount: %s", errstr); |
e05b6b52 | 2449 | ext3_warning(sb, __func__, "Marking fs in need of " |
1da177e4 LT |
2450 | "filesystem check."); |
2451 | ||
2452 | EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; | |
2453 | es->s_state |= cpu_to_le16(EXT3_ERROR_FS); | |
2454 | ext3_commit_super (sb, es, 1); | |
2455 | ||
2456 | journal_clear_err(journal); | |
2457 | } | |
2458 | } | |
2459 | ||
2460 | /* | |
2461 | * Force the running and committing transactions to commit, | |
2462 | * and wait on the commit. | |
2463 | */ | |
2464 | int ext3_force_commit(struct super_block *sb) | |
2465 | { | |
2466 | journal_t *journal; | |
2467 | int ret; | |
2468 | ||
2469 | if (sb->s_flags & MS_RDONLY) | |
2470 | return 0; | |
2471 | ||
2472 | journal = EXT3_SB(sb)->s_journal; | |
1da177e4 LT |
2473 | ret = ext3_journal_force_commit(journal); |
2474 | return ret; | |
2475 | } | |
2476 | ||
1da177e4 LT |
2477 | static int ext3_sync_fs(struct super_block *sb, int wait) |
2478 | { | |
02ac597c | 2479 | tid_t target; |
c87591b7 | 2480 | |
02ac597c JK |
2481 | if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { |
2482 | if (wait) | |
2483 | log_wait_commit(EXT3_SB(sb)->s_journal, target); | |
2484 | } | |
1da177e4 LT |
2485 | return 0; |
2486 | } | |
2487 | ||
2488 | /* | |
2489 | * LVM calls this function before a (read-only) snapshot is created. This | |
2490 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2491 | */ | |
c4be0c1d | 2492 | static int ext3_freeze(struct super_block *sb) |
1da177e4 | 2493 | { |
c4be0c1d TS |
2494 | int error = 0; |
2495 | journal_t *journal; | |
1da177e4 LT |
2496 | |
2497 | if (!(sb->s_flags & MS_RDONLY)) { | |
c4be0c1d | 2498 | journal = EXT3_SB(sb)->s_journal; |
1da177e4 LT |
2499 | |
2500 | /* Now we set up the journal barrier. */ | |
2501 | journal_lock_updates(journal); | |
2d7c820e HK |
2502 | |
2503 | /* | |
2504 | * We don't want to clear needs_recovery flag when we failed | |
2505 | * to flush the journal. | |
2506 | */ | |
c4be0c1d TS |
2507 | error = journal_flush(journal); |
2508 | if (error < 0) | |
2509 | goto out; | |
1da177e4 LT |
2510 | |
2511 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
2512 | EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
c4be0c1d TS |
2513 | error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); |
2514 | if (error) | |
2515 | goto out; | |
1da177e4 | 2516 | } |
c4be0c1d TS |
2517 | return 0; |
2518 | ||
2519 | out: | |
2520 | journal_unlock_updates(journal); | |
2521 | return error; | |
1da177e4 LT |
2522 | } |
2523 | ||
2524 | /* | |
2525 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2526 | * flag here, even though the filesystem is not technically dirty yet. | |
2527 | */ | |
c4be0c1d | 2528 | static int ext3_unfreeze(struct super_block *sb) |
1da177e4 LT |
2529 | { |
2530 | if (!(sb->s_flags & MS_RDONLY)) { | |
2531 | lock_super(sb); | |
2532 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
2533 | EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); | |
2534 | ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1); | |
2535 | unlock_super(sb); | |
2536 | journal_unlock_updates(EXT3_SB(sb)->s_journal); | |
2537 | } | |
c4be0c1d | 2538 | return 0; |
1da177e4 LT |
2539 | } |
2540 | ||
2541 | static int ext3_remount (struct super_block * sb, int * flags, char * data) | |
2542 | { | |
2543 | struct ext3_super_block * es; | |
2544 | struct ext3_sb_info *sbi = EXT3_SB(sb); | |
43d23f90 | 2545 | ext3_fsblk_t n_blocks_count = 0; |
08c6a96f JK |
2546 | unsigned long old_sb_flags; |
2547 | struct ext3_mount_options old_opts; | |
c79d967d | 2548 | int enable_quota = 0; |
08c6a96f JK |
2549 | int err; |
2550 | #ifdef CONFIG_QUOTA | |
2551 | int i; | |
2552 | #endif | |
2553 | ||
2554 | /* Store the original options */ | |
bbd6851a | 2555 | lock_super(sb); |
08c6a96f JK |
2556 | old_sb_flags = sb->s_flags; |
2557 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2558 | old_opts.s_resuid = sbi->s_resuid; | |
2559 | old_opts.s_resgid = sbi->s_resgid; | |
2560 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2561 | #ifdef CONFIG_QUOTA | |
2562 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
2563 | for (i = 0; i < MAXQUOTAS; i++) | |
2564 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
2565 | #endif | |
1da177e4 LT |
2566 | |
2567 | /* | |
2568 | * Allow the "check" option to be passed as a remount option. | |
2569 | */ | |
71b96257 | 2570 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { |
08c6a96f JK |
2571 | err = -EINVAL; |
2572 | goto restore_opts; | |
2573 | } | |
1da177e4 | 2574 | |
e3c96435 | 2575 | if (test_opt(sb, ABORT)) |
e05b6b52 | 2576 | ext3_abort(sb, __func__, "Abort forced by user"); |
1da177e4 LT |
2577 | |
2578 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
e3c96435 | 2579 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
1da177e4 LT |
2580 | |
2581 | es = sbi->s_es; | |
2582 | ||
2583 | ext3_init_journal_params(sb, sbi->s_journal); | |
2584 | ||
2585 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
2586 | n_blocks_count > le32_to_cpu(es->s_blocks_count)) { | |
e3c96435 | 2587 | if (test_opt(sb, ABORT)) { |
08c6a96f JK |
2588 | err = -EROFS; |
2589 | goto restore_opts; | |
2590 | } | |
1da177e4 LT |
2591 | |
2592 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
2593 | err = dquot_suspend(sb, -1); |
2594 | if (err < 0) | |
c79d967d | 2595 | goto restore_opts; |
c79d967d | 2596 | |
1da177e4 LT |
2597 | /* |
2598 | * First of all, the unconditional stuff we have to do | |
2599 | * to disable replay of the journal when we next remount | |
2600 | */ | |
2601 | sb->s_flags |= MS_RDONLY; | |
2602 | ||
2603 | /* | |
2604 | * OK, test if we are remounting a valid rw partition | |
2605 | * readonly, and if so set the rdonly flag and then | |
2606 | * mark the partition as valid again. | |
2607 | */ | |
2608 | if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) && | |
2609 | (sbi->s_mount_state & EXT3_VALID_FS)) | |
2610 | es->s_state = cpu_to_le16(sbi->s_mount_state); | |
2611 | ||
2612 | ext3_mark_recovery_complete(sb, es); | |
2613 | } else { | |
2614 | __le32 ret; | |
2615 | if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb, | |
2616 | ~EXT3_FEATURE_RO_COMPAT_SUPP))) { | |
4cf46b67 AF |
2617 | ext3_msg(sb, KERN_WARNING, |
2618 | "warning: couldn't remount RDWR " | |
2619 | "because of unsupported optional " | |
2620 | "features (%x)", le32_to_cpu(ret)); | |
08c6a96f JK |
2621 | err = -EROFS; |
2622 | goto restore_opts; | |
1da177e4 | 2623 | } |
ea9a05a1 ES |
2624 | |
2625 | /* | |
2626 | * If we have an unprocessed orphan list hanging | |
2627 | * around from a previously readonly bdev mount, | |
2628 | * require a full umount/remount for now. | |
2629 | */ | |
2630 | if (es->s_last_orphan) { | |
4cf46b67 | 2631 | ext3_msg(sb, KERN_WARNING, "warning: couldn't " |
ea9a05a1 ES |
2632 | "remount RDWR because of unprocessed " |
2633 | "orphan inode list. Please " | |
4cf46b67 | 2634 | "umount/remount instead."); |
ea9a05a1 ES |
2635 | err = -EINVAL; |
2636 | goto restore_opts; | |
2637 | } | |
2638 | ||
1da177e4 LT |
2639 | /* |
2640 | * Mounting a RDONLY partition read-write, so reread | |
2641 | * and store the current valid flag. (It may have | |
2642 | * been changed by e2fsck since we originally mounted | |
2643 | * the partition.) | |
2644 | */ | |
2645 | ext3_clear_journal_err(sb, es); | |
2646 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
a4e4de36 | 2647 | if ((err = ext3_group_extend(sb, es, n_blocks_count))) |
08c6a96f | 2648 | goto restore_opts; |
1da177e4 LT |
2649 | if (!ext3_setup_super (sb, es, 0)) |
2650 | sb->s_flags &= ~MS_RDONLY; | |
c79d967d | 2651 | enable_quota = 1; |
1da177e4 LT |
2652 | } |
2653 | } | |
08c6a96f JK |
2654 | #ifdef CONFIG_QUOTA |
2655 | /* Release old quota file names */ | |
2656 | for (i = 0; i < MAXQUOTAS; i++) | |
2657 | if (old_opts.s_qf_names[i] && | |
2658 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2659 | kfree(old_opts.s_qf_names[i]); | |
2660 | #endif | |
bbd6851a | 2661 | unlock_super(sb); |
c79d967d CH |
2662 | |
2663 | if (enable_quota) | |
0f0dd62f | 2664 | dquot_resume(sb, -1); |
1da177e4 | 2665 | return 0; |
08c6a96f JK |
2666 | restore_opts: |
2667 | sb->s_flags = old_sb_flags; | |
2668 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
2669 | sbi->s_resuid = old_opts.s_resuid; | |
2670 | sbi->s_resgid = old_opts.s_resgid; | |
2671 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
2672 | #ifdef CONFIG_QUOTA | |
2673 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
2674 | for (i = 0; i < MAXQUOTAS; i++) { | |
2675 | if (sbi->s_qf_names[i] && | |
2676 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2677 | kfree(sbi->s_qf_names[i]); | |
2678 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
2679 | } | |
2680 | #endif | |
bbd6851a | 2681 | unlock_super(sb); |
08c6a96f | 2682 | return err; |
1da177e4 LT |
2683 | } |
2684 | ||
726c3342 | 2685 | static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf) |
1da177e4 | 2686 | { |
726c3342 | 2687 | struct super_block *sb = dentry->d_sb; |
09fe316a AT |
2688 | struct ext3_sb_info *sbi = EXT3_SB(sb); |
2689 | struct ext3_super_block *es = sbi->s_es; | |
50ee0a32 | 2690 | u64 fsid; |
1da177e4 | 2691 | |
a71ce8c6 BP |
2692 | if (test_opt(sb, MINIX_DF)) { |
2693 | sbi->s_overhead_last = 0; | |
2694 | } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { | |
2695 | unsigned long ngroups = sbi->s_groups_count, i; | |
2696 | ext3_fsblk_t overhead = 0; | |
1da177e4 LT |
2697 | smp_rmb(); |
2698 | ||
2699 | /* | |
a71ce8c6 BP |
2700 | * Compute the overhead (FS structures). This is constant |
2701 | * for a given filesystem unless the number of block groups | |
2702 | * changes so we cache the previous value until it does. | |
1da177e4 LT |
2703 | */ |
2704 | ||
2705 | /* | |
2706 | * All of the blocks before first_data_block are | |
2707 | * overhead | |
2708 | */ | |
2709 | overhead = le32_to_cpu(es->s_first_data_block); | |
2710 | ||
2711 | /* | |
2712 | * Add the overhead attributed to the superblock and | |
2713 | * block group descriptors. If the sparse superblocks | |
2714 | * feature is turned on, then not all groups have this. | |
2715 | */ | |
2716 | for (i = 0; i < ngroups; i++) { | |
2717 | overhead += ext3_bg_has_super(sb, i) + | |
2718 | ext3_bg_num_gdb(sb, i); | |
2719 | cond_resched(); | |
2720 | } | |
2721 | ||
2722 | /* | |
2723 | * Every block group has an inode bitmap, a block | |
2724 | * bitmap, and an inode table. | |
2725 | */ | |
a71ce8c6 BP |
2726 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
2727 | sbi->s_overhead_last = overhead; | |
2728 | smp_wmb(); | |
2729 | sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); | |
1da177e4 LT |
2730 | } |
2731 | ||
2732 | buf->f_type = EXT3_SUPER_MAGIC; | |
2733 | buf->f_bsize = sb->s_blocksize; | |
a71ce8c6 | 2734 | buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last; |
52d9f3b4 | 2735 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); |
1da177e4 LT |
2736 | buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); |
2737 | if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) | |
2738 | buf->f_bavail = 0; | |
2739 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 2740 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
1da177e4 | 2741 | buf->f_namelen = EXT3_NAME_LEN; |
50ee0a32 PE |
2742 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
2743 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
2744 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
2745 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
1da177e4 LT |
2746 | return 0; |
2747 | } | |
2748 | ||
2749 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
2750 | * is locked for write. Otherwise the are possible deadlocks: | |
2751 | * Process 1 Process 2 | |
2752 | * ext3_create() quota_sync() | |
2753 | * journal_start() write_dquot() | |
871a2931 | 2754 | * dquot_initialize() down(dqio_mutex) |
d3be915f | 2755 | * down(dqio_mutex) journal_start() |
1da177e4 LT |
2756 | * |
2757 | */ | |
2758 | ||
2759 | #ifdef CONFIG_QUOTA | |
2760 | ||
2761 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
2762 | { | |
2763 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
2764 | } | |
2765 | ||
1da177e4 LT |
2766 | static int ext3_write_dquot(struct dquot *dquot) |
2767 | { | |
2768 | int ret, err; | |
2769 | handle_t *handle; | |
2770 | struct inode *inode; | |
2771 | ||
2772 | inode = dquot_to_inode(dquot); | |
2773 | handle = ext3_journal_start(inode, | |
1f54587b | 2774 | EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2775 | if (IS_ERR(handle)) |
2776 | return PTR_ERR(handle); | |
2777 | ret = dquot_commit(dquot); | |
2778 | err = ext3_journal_stop(handle); | |
2779 | if (!ret) | |
2780 | ret = err; | |
2781 | return ret; | |
2782 | } | |
2783 | ||
2784 | static int ext3_acquire_dquot(struct dquot *dquot) | |
2785 | { | |
2786 | int ret, err; | |
2787 | handle_t *handle; | |
2788 | ||
2789 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2790 | EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
1da177e4 LT |
2791 | if (IS_ERR(handle)) |
2792 | return PTR_ERR(handle); | |
2793 | ret = dquot_acquire(dquot); | |
2794 | err = ext3_journal_stop(handle); | |
2795 | if (!ret) | |
2796 | ret = err; | |
2797 | return ret; | |
2798 | } | |
2799 | ||
2800 | static int ext3_release_dquot(struct dquot *dquot) | |
2801 | { | |
2802 | int ret, err; | |
2803 | handle_t *handle; | |
2804 | ||
2805 | handle = ext3_journal_start(dquot_to_inode(dquot), | |
1f54587b | 2806 | EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
2807 | if (IS_ERR(handle)) { |
2808 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2809 | dquot_release(dquot); | |
1da177e4 | 2810 | return PTR_ERR(handle); |
9c3013e9 | 2811 | } |
1da177e4 LT |
2812 | ret = dquot_release(dquot); |
2813 | err = ext3_journal_stop(handle); | |
2814 | if (!ret) | |
2815 | ret = err; | |
2816 | return ret; | |
2817 | } | |
2818 | ||
2819 | static int ext3_mark_dquot_dirty(struct dquot *dquot) | |
2820 | { | |
99aeaf63 | 2821 | /* Are we journaling quotas? */ |
1da177e4 LT |
2822 | if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2823 | EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2824 | dquot_mark_dquot_dirty(dquot); | |
2825 | return ext3_write_dquot(dquot); | |
2826 | } else { | |
2827 | return dquot_mark_dquot_dirty(dquot); | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | static int ext3_write_info(struct super_block *sb, int type) | |
2832 | { | |
2833 | int ret, err; | |
2834 | handle_t *handle; | |
2835 | ||
2836 | /* Data block + inode block */ | |
2837 | handle = ext3_journal_start(sb->s_root->d_inode, 2); | |
2838 | if (IS_ERR(handle)) | |
2839 | return PTR_ERR(handle); | |
2840 | ret = dquot_commit_info(sb, type); | |
2841 | err = ext3_journal_stop(handle); | |
2842 | if (!ret) | |
2843 | ret = err; | |
2844 | return ret; | |
2845 | } | |
2846 | ||
2847 | /* | |
2848 | * Turn on quotas during mount time - we need to find | |
2849 | * the quota file and such... | |
2850 | */ | |
2851 | static int ext3_quota_on_mount(struct super_block *sb, int type) | |
2852 | { | |
287a8095 CH |
2853 | return dquot_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type], |
2854 | EXT3_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2855 | } |
2856 | ||
2857 | /* | |
2858 | * Standard function to be called on quota_on | |
2859 | */ | |
2860 | static int ext3_quota_on(struct super_block *sb, int type, int format_id, | |
307ae18a | 2861 | char *name) |
1da177e4 LT |
2862 | { |
2863 | int err; | |
8264613d | 2864 | struct path path; |
1da177e4 | 2865 | |
1f54587b JK |
2866 | if (!test_opt(sb, QUOTA)) |
2867 | return -EINVAL; | |
9cfe7b90 | 2868 | |
8264613d | 2869 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
1da177e4 LT |
2870 | if (err) |
2871 | return err; | |
9cfe7b90 | 2872 | |
1da177e4 | 2873 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
2874 | if (path.mnt->mnt_sb != sb) { |
2875 | path_put(&path); | |
1da177e4 LT |
2876 | return -EXDEV; |
2877 | } | |
9cfe7b90 JK |
2878 | /* Journaling quota? */ |
2879 | if (EXT3_SB(sb)->s_qf_names[type]) { | |
2880 | /* Quotafile not of fs root? */ | |
8264613d | 2881 | if (path.dentry->d_parent != sb->s_root) |
4cf46b67 AF |
2882 | ext3_msg(sb, KERN_WARNING, |
2883 | "warning: Quota file not on filesystem root. " | |
2884 | "Journaled quota will not work."); | |
9cfe7b90 JK |
2885 | } |
2886 | ||
2887 | /* | |
2888 | * When we journal data on quota file, we have to flush journal to see | |
2889 | * all updates to the file when we bypass pagecache... | |
2890 | */ | |
8264613d | 2891 | if (ext3_should_journal_data(path.dentry->d_inode)) { |
9cfe7b90 JK |
2892 | /* |
2893 | * We don't need to lock updates but journal_flush() could | |
2894 | * otherwise be livelocked... | |
2895 | */ | |
2896 | journal_lock_updates(EXT3_SB(sb)->s_journal); | |
2d7c820e | 2897 | err = journal_flush(EXT3_SB(sb)->s_journal); |
9cfe7b90 | 2898 | journal_unlock_updates(EXT3_SB(sb)->s_journal); |
2d7c820e | 2899 | if (err) { |
12e1ec9f | 2900 | path_put(&path); |
2d7c820e HK |
2901 | return err; |
2902 | } | |
9cfe7b90 JK |
2903 | } |
2904 | ||
287a8095 | 2905 | err = dquot_quota_on_path(sb, type, format_id, &path); |
8264613d | 2906 | path_put(&path); |
77e69dac | 2907 | return err; |
1da177e4 LT |
2908 | } |
2909 | ||
2910 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2911 | * acquiring the locks... As quota files are never truncated and quota code | |
2912 | * itself serializes the operations (and noone else should touch the files) | |
2913 | * we don't have to be afraid of races */ | |
2914 | static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, | |
2915 | size_t len, loff_t off) | |
2916 | { | |
2917 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2918 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2919 | int err = 0; | |
2920 | int offset = off & (sb->s_blocksize - 1); | |
2921 | int tocopy; | |
2922 | size_t toread; | |
2923 | struct buffer_head *bh; | |
2924 | loff_t i_size = i_size_read(inode); | |
2925 | ||
2926 | if (off > i_size) | |
2927 | return 0; | |
2928 | if (off+len > i_size) | |
2929 | len = i_size-off; | |
2930 | toread = len; | |
2931 | while (toread > 0) { | |
2932 | tocopy = sb->s_blocksize - offset < toread ? | |
2933 | sb->s_blocksize - offset : toread; | |
2934 | bh = ext3_bread(NULL, inode, blk, 0, &err); | |
2935 | if (err) | |
2936 | return err; | |
2937 | if (!bh) /* A hole? */ | |
2938 | memset(data, 0, tocopy); | |
2939 | else | |
2940 | memcpy(data, bh->b_data+offset, tocopy); | |
2941 | brelse(bh); | |
2942 | offset = 0; | |
2943 | toread -= tocopy; | |
2944 | data += tocopy; | |
2945 | blk++; | |
2946 | } | |
2947 | return len; | |
2948 | } | |
2949 | ||
2950 | /* Write to quotafile (we know the transaction is already started and has | |
2951 | * enough credits) */ | |
2952 | static ssize_t ext3_quota_write(struct super_block *sb, int type, | |
2953 | const char *data, size_t len, loff_t off) | |
2954 | { | |
2955 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2956 | sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb); | |
2957 | int err = 0; | |
2958 | int offset = off & (sb->s_blocksize - 1); | |
1da177e4 | 2959 | int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL; |
1da177e4 LT |
2960 | struct buffer_head *bh; |
2961 | handle_t *handle = journal_current_handle(); | |
2962 | ||
9c3013e9 | 2963 | if (!handle) { |
4cf46b67 AF |
2964 | ext3_msg(sb, KERN_WARNING, |
2965 | "warning: quota write (off=%llu, len=%llu)" | |
2966 | " cancelled because transaction is not started.", | |
9c3013e9 JK |
2967 | (unsigned long long)off, (unsigned long long)len); |
2968 | return -EIO; | |
2969 | } | |
e5472147 DM |
2970 | |
2971 | /* | |
2972 | * Since we account only one data block in transaction credits, | |
2973 | * then it is impossible to cross a block boundary. | |
2974 | */ | |
2975 | if (sb->s_blocksize - offset < len) { | |
2976 | ext3_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
2977 | " cancelled because not block aligned", | |
2978 | (unsigned long long)off, (unsigned long long)len); | |
2979 | return -EIO; | |
2980 | } | |
5c81a419 | 2981 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
e5472147 DM |
2982 | bh = ext3_bread(handle, inode, blk, 1, &err); |
2983 | if (!bh) | |
2984 | goto out; | |
2985 | if (journal_quota) { | |
2986 | err = ext3_journal_get_write_access(handle, bh); | |
2987 | if (err) { | |
2988 | brelse(bh); | |
1da177e4 | 2989 | goto out; |
1da177e4 | 2990 | } |
1da177e4 | 2991 | } |
e5472147 DM |
2992 | lock_buffer(bh); |
2993 | memcpy(bh->b_data+offset, data, len); | |
2994 | flush_dcache_page(bh->b_page); | |
2995 | unlock_buffer(bh); | |
2996 | if (journal_quota) | |
2997 | err = ext3_journal_dirty_metadata(handle, bh); | |
2998 | else { | |
2999 | /* Always do at least ordered writes for quotas */ | |
3000 | err = ext3_journal_dirty_data(handle, bh); | |
3001 | mark_buffer_dirty(bh); | |
3002 | } | |
3003 | brelse(bh); | |
1da177e4 | 3004 | out: |
e5472147 | 3005 | if (err) { |
f5c8f7da | 3006 | mutex_unlock(&inode->i_mutex); |
1da177e4 | 3007 | return err; |
f5c8f7da | 3008 | } |
e5472147 DM |
3009 | if (inode->i_size < off + len) { |
3010 | i_size_write(inode, off + len); | |
1da177e4 LT |
3011 | EXT3_I(inode)->i_disksize = inode->i_size; |
3012 | } | |
3013 | inode->i_version++; | |
3014 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
3015 | ext3_mark_inode_dirty(handle, inode); | |
1b1dcc1b | 3016 | mutex_unlock(&inode->i_mutex); |
e5472147 | 3017 | return len; |
1da177e4 LT |
3018 | } |
3019 | ||
3020 | #endif | |
3021 | ||
152a0836 AV |
3022 | static struct dentry *ext3_mount(struct file_system_type *fs_type, |
3023 | int flags, const char *dev_name, void *data) | |
1da177e4 | 3024 | { |
152a0836 | 3025 | return mount_bdev(fs_type, flags, dev_name, data, ext3_fill_super); |
1da177e4 LT |
3026 | } |
3027 | ||
3028 | static struct file_system_type ext3_fs_type = { | |
3029 | .owner = THIS_MODULE, | |
3030 | .name = "ext3", | |
152a0836 | 3031 | .mount = ext3_mount, |
1da177e4 LT |
3032 | .kill_sb = kill_block_super, |
3033 | .fs_flags = FS_REQUIRES_DEV, | |
3034 | }; | |
3035 | ||
3036 | static int __init init_ext3_fs(void) | |
3037 | { | |
3038 | int err = init_ext3_xattr(); | |
3039 | if (err) | |
3040 | return err; | |
3041 | err = init_inodecache(); | |
3042 | if (err) | |
3043 | goto out1; | |
3044 | err = register_filesystem(&ext3_fs_type); | |
3045 | if (err) | |
3046 | goto out; | |
3047 | return 0; | |
3048 | out: | |
3049 | destroy_inodecache(); | |
3050 | out1: | |
e9ad5620 | 3051 | exit_ext3_xattr(); |
1da177e4 LT |
3052 | return err; |
3053 | } | |
3054 | ||
3055 | static void __exit exit_ext3_fs(void) | |
3056 | { | |
3057 | unregister_filesystem(&ext3_fs_type); | |
3058 | destroy_inodecache(); | |
3059 | exit_ext3_xattr(); | |
3060 | } | |
3061 | ||
3062 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
3063 | MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions"); | |
3064 | MODULE_LICENSE("GPL"); | |
3065 | module_init(init_ext3_fs) | |
3066 | module_exit(exit_ext3_fs) |