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1 | /* |
2 | * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README |
3 | * |
4 | * Trivial changes by Alan Cox to add the LFS fixes |
5 | * |
6 | * Trivial Changes: |
7 | * Rights granted to Hans Reiser to redistribute under other terms providing |
8 | * he accepts all liability including but not limited to patent, fitness |
9 | * for purpose, and direct or indirect claims arising from failure to perform. |
10 | * |
11 | * NO WARRANTY |
12 | */ |
13 | |
14 | #include <linux/module.h> |
15 | #include <linux/vmalloc.h> |
16 | #include <linux/time.h> |
17 | #include <asm/uaccess.h> |
18 | #include <linux/reiserfs_fs.h> |
19 | #include <linux/reiserfs_acl.h> |
20 | #include <linux/reiserfs_xattr.h> |
21 | #include <linux/init.h> |
22 | #include <linux/blkdev.h> |
23 | #include <linux/buffer_head.h> |
24 | #include <linux/exportfs.h> |
25 | #include <linux/quotaops.h> |
26 | #include <linux/vfs.h> |
27 | #include <linux/mount.h> |
28 | #include <linux/namei.h> |
29 | #include <linux/crc32.h> |
30 | #include <linux/smp_lock.h> |
31 | |
32 | struct file_system_type reiserfs_fs_type; |
33 | |
34 | static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; |
35 | static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; |
36 | static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; |
37 | |
38 | int is_reiserfs_3_5(struct reiserfs_super_block *rs) |
39 | { |
40 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, |
41 | strlen(reiserfs_3_5_magic_string)); |
42 | } |
43 | |
44 | int is_reiserfs_3_6(struct reiserfs_super_block *rs) |
45 | { |
46 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, |
47 | strlen(reiserfs_3_6_magic_string)); |
48 | } |
49 | |
50 | int is_reiserfs_jr(struct reiserfs_super_block *rs) |
51 | { |
52 | return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, |
53 | strlen(reiserfs_jr_magic_string)); |
54 | } |
55 | |
56 | static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) |
57 | { |
58 | return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || |
59 | is_reiserfs_jr(rs)); |
60 | } |
61 | |
62 | static int reiserfs_remount(struct super_block *s, int *flags, char *data); |
63 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); |
64 | |
65 | static int reiserfs_sync_fs(struct super_block *s, int wait) |
66 | { |
67 | struct reiserfs_transaction_handle th; |
68 | |
69 | reiserfs_write_lock(s); |
70 | if (!journal_begin(&th, s, 1)) |
71 | if (!journal_end_sync(&th, s, 1)) |
72 | reiserfs_flush_old_commits(s); |
73 | s->s_dirt = 0; /* Even if it's not true. |
74 | * We'll loop forever in sync_supers otherwise */ |
75 | reiserfs_write_unlock(s); |
76 | return 0; |
77 | } |
78 | |
79 | static void reiserfs_write_super(struct super_block *s) |
80 | { |
81 | reiserfs_sync_fs(s, 1); |
82 | } |
83 | |
84 | static int reiserfs_freeze(struct super_block *s) |
85 | { |
86 | struct reiserfs_transaction_handle th; |
87 | reiserfs_write_lock(s); |
88 | if (!(s->s_flags & MS_RDONLY)) { |
89 | int err = journal_begin(&th, s, 1); |
90 | if (err) { |
91 | reiserfs_block_writes(&th); |
92 | } else { |
93 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), |
94 | 1); |
95 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
96 | reiserfs_block_writes(&th); |
97 | journal_end_sync(&th, s, 1); |
98 | } |
99 | } |
100 | s->s_dirt = 0; |
101 | reiserfs_write_unlock(s); |
102 | return 0; |
103 | } |
104 | |
105 | static int reiserfs_unfreeze(struct super_block *s) |
106 | { |
107 | reiserfs_allow_writes(s); |
108 | return 0; |
109 | } |
110 | |
111 | extern const struct in_core_key MAX_IN_CORE_KEY; |
112 | |
113 | /* this is used to delete "save link" when there are no items of a |
114 | file it points to. It can either happen if unlink is completed but |
115 | "save unlink" removal, or if file has both unlink and truncate |
116 | pending and as unlink completes first (because key of "save link" |
117 | protecting unlink is bigger that a key lf "save link" which |
118 | protects truncate), so there left no items to make truncate |
119 | completion on */ |
120 | static int remove_save_link_only(struct super_block *s, |
121 | struct reiserfs_key *key, int oid_free) |
122 | { |
123 | struct reiserfs_transaction_handle th; |
124 | int err; |
125 | |
126 | /* we are going to do one balancing */ |
127 | err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); |
128 | if (err) |
129 | return err; |
130 | |
131 | reiserfs_delete_solid_item(&th, NULL, key); |
132 | if (oid_free) |
133 | /* removals are protected by direct items */ |
134 | reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); |
135 | |
136 | return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT); |
137 | } |
138 | |
139 | #ifdef CONFIG_QUOTA |
140 | static int reiserfs_quota_on_mount(struct super_block *, int); |
141 | #endif |
142 | |
143 | /* look for uncompleted unlinks and truncates and complete them */ |
144 | static int finish_unfinished(struct super_block *s) |
145 | { |
146 | INITIALIZE_PATH(path); |
147 | struct cpu_key max_cpu_key, obj_key; |
148 | struct reiserfs_key save_link_key, last_inode_key; |
149 | int retval = 0; |
150 | struct item_head *ih; |
151 | struct buffer_head *bh; |
152 | int item_pos; |
153 | char *item; |
154 | int done; |
155 | struct inode *inode; |
156 | int truncate; |
157 | #ifdef CONFIG_QUOTA |
158 | int i; |
159 | int ms_active_set; |
160 | #endif |
161 | |
162 | /* compose key to look for "save" links */ |
163 | max_cpu_key.version = KEY_FORMAT_3_5; |
164 | max_cpu_key.on_disk_key.k_dir_id = ~0U; |
165 | max_cpu_key.on_disk_key.k_objectid = ~0U; |
166 | set_cpu_key_k_offset(&max_cpu_key, ~0U); |
167 | max_cpu_key.key_length = 3; |
168 | |
169 | memset(&last_inode_key, 0, sizeof(last_inode_key)); |
170 | |
171 | #ifdef CONFIG_QUOTA |
172 | /* Needed for iput() to work correctly and not trash data */ |
173 | if (s->s_flags & MS_ACTIVE) { |
174 | ms_active_set = 0; |
175 | } else { |
176 | ms_active_set = 1; |
177 | s->s_flags |= MS_ACTIVE; |
178 | } |
179 | /* Turn on quotas so that they are updated correctly */ |
180 | for (i = 0; i < MAXQUOTAS; i++) { |
181 | if (REISERFS_SB(s)->s_qf_names[i]) { |
182 | int ret = reiserfs_quota_on_mount(s, i); |
183 | if (ret < 0) |
184 | reiserfs_warning(s, "reiserfs-2500", |
185 | "cannot turn on journaled " |
186 | "quota: error %d", ret); |
187 | } |
188 | } |
189 | #endif |
190 | |
191 | done = 0; |
192 | REISERFS_SB(s)->s_is_unlinked_ok = 1; |
193 | while (!retval) { |
194 | retval = search_item(s, &max_cpu_key, &path); |
195 | if (retval != ITEM_NOT_FOUND) { |
196 | reiserfs_error(s, "vs-2140", |
197 | "search_by_key returned %d", retval); |
198 | break; |
199 | } |
200 | |
201 | bh = get_last_bh(&path); |
202 | item_pos = get_item_pos(&path); |
203 | if (item_pos != B_NR_ITEMS(bh)) { |
204 | reiserfs_warning(s, "vs-2060", |
205 | "wrong position found"); |
206 | break; |
207 | } |
208 | item_pos--; |
209 | ih = B_N_PITEM_HEAD(bh, item_pos); |
210 | |
211 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) |
212 | /* there are no "save" links anymore */ |
213 | break; |
214 | |
215 | save_link_key = ih->ih_key; |
216 | if (is_indirect_le_ih(ih)) |
217 | truncate = 1; |
218 | else |
219 | truncate = 0; |
220 | |
221 | /* reiserfs_iget needs k_dirid and k_objectid only */ |
222 | item = B_I_PITEM(bh, ih); |
223 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); |
224 | obj_key.on_disk_key.k_objectid = |
225 | le32_to_cpu(ih->ih_key.k_objectid); |
226 | obj_key.on_disk_key.k_offset = 0; |
227 | obj_key.on_disk_key.k_type = 0; |
228 | |
229 | pathrelse(&path); |
230 | |
231 | inode = reiserfs_iget(s, &obj_key); |
232 | if (!inode) { |
233 | /* the unlink almost completed, it just did not manage to remove |
234 | "save" link and release objectid */ |
235 | reiserfs_warning(s, "vs-2180", "iget failed for %K", |
236 | &obj_key); |
237 | retval = remove_save_link_only(s, &save_link_key, 1); |
238 | continue; |
239 | } |
240 | |
241 | if (!truncate && inode->i_nlink) { |
242 | /* file is not unlinked */ |
243 | reiserfs_warning(s, "vs-2185", |
244 | "file %K is not unlinked", |
245 | &obj_key); |
246 | retval = remove_save_link_only(s, &save_link_key, 0); |
247 | continue; |
248 | } |
249 | vfs_dq_init(inode); |
250 | |
251 | if (truncate && S_ISDIR(inode->i_mode)) { |
252 | /* We got a truncate request for a dir which is impossible. |
253 | The only imaginable way is to execute unfinished truncate request |
254 | then boot into old kernel, remove the file and create dir with |
255 | the same key. */ |
256 | reiserfs_warning(s, "green-2101", |
257 | "impossible truncate on a " |
258 | "directory %k. Please report", |
259 | INODE_PKEY(inode)); |
260 | retval = remove_save_link_only(s, &save_link_key, 0); |
261 | truncate = 0; |
262 | iput(inode); |
263 | continue; |
264 | } |
265 | |
266 | if (truncate) { |
267 | REISERFS_I(inode)->i_flags |= |
268 | i_link_saved_truncate_mask; |
269 | /* not completed truncate found. New size was committed together |
270 | with "save" link */ |
271 | reiserfs_info(s, "Truncating %k to %Ld ..", |
272 | INODE_PKEY(inode), inode->i_size); |
273 | reiserfs_truncate_file(inode, |
274 | 0 |
275 | /*don't update modification time */ |
276 | ); |
277 | retval = remove_save_link(inode, truncate); |
278 | } else { |
279 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; |
280 | /* not completed unlink (rmdir) found */ |
281 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); |
282 | if (memcmp(&last_inode_key, INODE_PKEY(inode), |
283 | sizeof(last_inode_key))){ |
284 | last_inode_key = *INODE_PKEY(inode); |
285 | /* removal gets completed in iput */ |
286 | retval = 0; |
287 | } else { |
288 | reiserfs_warning(s, "super-2189", "Dead loop " |
289 | "in finish_unfinished " |
290 | "detected, just remove " |
291 | "save link\n"); |
292 | retval = remove_save_link_only(s, |
293 | &save_link_key, 0); |
294 | } |
295 | } |
296 | |
297 | iput(inode); |
298 | printk("done\n"); |
299 | done++; |
300 | } |
301 | REISERFS_SB(s)->s_is_unlinked_ok = 0; |
302 | |
303 | #ifdef CONFIG_QUOTA |
304 | /* Turn quotas off */ |
305 | for (i = 0; i < MAXQUOTAS; i++) { |
306 | if (sb_dqopt(s)->files[i]) |
307 | vfs_quota_off(s, i, 0); |
308 | } |
309 | if (ms_active_set) |
310 | /* Restore the flag back */ |
311 | s->s_flags &= ~MS_ACTIVE; |
312 | #endif |
313 | pathrelse(&path); |
314 | if (done) |
315 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " |
316 | "Completed\n", done); |
317 | return retval; |
318 | } |
319 | |
320 | /* to protect file being unlinked from getting lost we "safe" link files |
321 | being unlinked. This link will be deleted in the same transaction with last |
322 | item of file. mounting the filesystem we scan all these links and remove |
323 | files which almost got lost */ |
324 | void add_save_link(struct reiserfs_transaction_handle *th, |
325 | struct inode *inode, int truncate) |
326 | { |
327 | INITIALIZE_PATH(path); |
328 | int retval; |
329 | struct cpu_key key; |
330 | struct item_head ih; |
331 | __le32 link; |
332 | |
333 | BUG_ON(!th->t_trans_id); |
334 | |
335 | /* file can only get one "save link" of each kind */ |
336 | RFALSE(truncate && |
337 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), |
338 | "saved link already exists for truncated inode %lx", |
339 | (long)inode->i_ino); |
340 | RFALSE(!truncate && |
341 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), |
342 | "saved link already exists for unlinked inode %lx", |
343 | (long)inode->i_ino); |
344 | |
345 | /* setup key of "save" link */ |
346 | key.version = KEY_FORMAT_3_5; |
347 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; |
348 | key.on_disk_key.k_objectid = inode->i_ino; |
349 | if (!truncate) { |
350 | /* unlink, rmdir, rename */ |
351 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); |
352 | set_cpu_key_k_type(&key, TYPE_DIRECT); |
353 | |
354 | /* item head of "safe" link */ |
355 | make_le_item_head(&ih, &key, key.version, |
356 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, |
357 | 4 /*length */ , 0xffff /*free space */ ); |
358 | } else { |
359 | /* truncate */ |
360 | if (S_ISDIR(inode->i_mode)) |
361 | reiserfs_warning(inode->i_sb, "green-2102", |
362 | "Adding a truncate savelink for " |
363 | "a directory %k! Please report", |
364 | INODE_PKEY(inode)); |
365 | set_cpu_key_k_offset(&key, 1); |
366 | set_cpu_key_k_type(&key, TYPE_INDIRECT); |
367 | |
368 | /* item head of "safe" link */ |
369 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, |
370 | 4 /*length */ , 0 /*free space */ ); |
371 | } |
372 | key.key_length = 3; |
373 | |
374 | /* look for its place in the tree */ |
375 | retval = search_item(inode->i_sb, &key, &path); |
376 | if (retval != ITEM_NOT_FOUND) { |
377 | if (retval != -ENOSPC) |
378 | reiserfs_error(inode->i_sb, "vs-2100", |
379 | "search_by_key (%K) returned %d", &key, |
380 | retval); |
381 | pathrelse(&path); |
382 | return; |
383 | } |
384 | |
385 | /* body of "save" link */ |
386 | link = INODE_PKEY(inode)->k_dir_id; |
387 | |
388 | /* put "save" link inot tree, don't charge quota to anyone */ |
389 | retval = |
390 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); |
391 | if (retval) { |
392 | if (retval != -ENOSPC) |
393 | reiserfs_error(inode->i_sb, "vs-2120", |
394 | "insert_item returned %d", retval); |
395 | } else { |
396 | if (truncate) |
397 | REISERFS_I(inode)->i_flags |= |
398 | i_link_saved_truncate_mask; |
399 | else |
400 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; |
401 | } |
402 | } |
403 | |
404 | /* this opens transaction unlike add_save_link */ |
405 | int remove_save_link(struct inode *inode, int truncate) |
406 | { |
407 | struct reiserfs_transaction_handle th; |
408 | struct reiserfs_key key; |
409 | int err; |
410 | |
411 | /* we are going to do one balancing only */ |
412 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); |
413 | if (err) |
414 | return err; |
415 | |
416 | /* setup key of "save" link */ |
417 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); |
418 | key.k_objectid = INODE_PKEY(inode)->k_objectid; |
419 | if (!truncate) { |
420 | /* unlink, rmdir, rename */ |
421 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, |
422 | 1 + inode->i_sb->s_blocksize); |
423 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); |
424 | } else { |
425 | /* truncate */ |
426 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); |
427 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); |
428 | } |
429 | |
430 | if ((truncate && |
431 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || |
432 | (!truncate && |
433 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) |
434 | /* don't take quota bytes from anywhere */ |
435 | reiserfs_delete_solid_item(&th, NULL, &key); |
436 | if (!truncate) { |
437 | reiserfs_release_objectid(&th, inode->i_ino); |
438 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; |
439 | } else |
440 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; |
441 | |
442 | return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); |
443 | } |
444 | |
445 | static void reiserfs_kill_sb(struct super_block *s) |
446 | { |
447 | if (REISERFS_SB(s)) { |
448 | if (REISERFS_SB(s)->xattr_root) { |
449 | d_invalidate(REISERFS_SB(s)->xattr_root); |
450 | dput(REISERFS_SB(s)->xattr_root); |
451 | REISERFS_SB(s)->xattr_root = NULL; |
452 | } |
453 | if (REISERFS_SB(s)->priv_root) { |
454 | d_invalidate(REISERFS_SB(s)->priv_root); |
455 | dput(REISERFS_SB(s)->priv_root); |
456 | REISERFS_SB(s)->priv_root = NULL; |
457 | } |
458 | } |
459 | |
460 | kill_block_super(s); |
461 | } |
462 | |
463 | static void reiserfs_put_super(struct super_block *s) |
464 | { |
465 | struct reiserfs_transaction_handle th; |
466 | th.t_trans_id = 0; |
467 | |
468 | lock_kernel(); |
469 | |
470 | if (s->s_dirt) |
471 | reiserfs_write_super(s); |
472 | |
473 | /* change file system state to current state if it was mounted with read-write permissions */ |
474 | if (!(s->s_flags & MS_RDONLY)) { |
475 | if (!journal_begin(&th, s, 10)) { |
476 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), |
477 | 1); |
478 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), |
479 | REISERFS_SB(s)->s_mount_state); |
480 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
481 | } |
482 | } |
483 | |
484 | /* note, journal_release checks for readonly mount, and can decide not |
485 | ** to do a journal_end |
486 | */ |
487 | journal_release(&th, s); |
488 | |
489 | reiserfs_free_bitmap_cache(s); |
490 | |
491 | brelse(SB_BUFFER_WITH_SB(s)); |
492 | |
493 | print_statistics(s); |
494 | |
495 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
496 | reiserfs_warning(s, "green-2005", "reserved blocks left %d", |
497 | REISERFS_SB(s)->reserved_blocks); |
498 | } |
499 | |
500 | reiserfs_proc_info_done(s); |
501 | |
502 | kfree(s->s_fs_info); |
503 | s->s_fs_info = NULL; |
504 | |
505 | unlock_kernel(); |
506 | } |
507 | |
508 | static struct kmem_cache *reiserfs_inode_cachep; |
509 | |
510 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) |
511 | { |
512 | struct reiserfs_inode_info *ei; |
513 | ei = (struct reiserfs_inode_info *) |
514 | kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
515 | if (!ei) |
516 | return NULL; |
517 | return &ei->vfs_inode; |
518 | } |
519 | |
520 | static void reiserfs_destroy_inode(struct inode *inode) |
521 | { |
522 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); |
523 | } |
524 | |
525 | static void init_once(void *foo) |
526 | { |
527 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
528 | |
529 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
530 | inode_init_once(&ei->vfs_inode); |
531 | } |
532 | |
533 | static int init_inodecache(void) |
534 | { |
535 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", |
536 | sizeof(struct |
537 | reiserfs_inode_info), |
538 | 0, (SLAB_RECLAIM_ACCOUNT| |
539 | SLAB_MEM_SPREAD), |
540 | init_once); |
541 | if (reiserfs_inode_cachep == NULL) |
542 | return -ENOMEM; |
543 | return 0; |
544 | } |
545 | |
546 | static void destroy_inodecache(void) |
547 | { |
548 | kmem_cache_destroy(reiserfs_inode_cachep); |
549 | } |
550 | |
551 | /* we don't mark inodes dirty, we just log them */ |
552 | static void reiserfs_dirty_inode(struct inode *inode) |
553 | { |
554 | struct reiserfs_transaction_handle th; |
555 | |
556 | int err = 0; |
557 | if (inode->i_sb->s_flags & MS_RDONLY) { |
558 | reiserfs_warning(inode->i_sb, "clm-6006", |
559 | "writing inode %lu on readonly FS", |
560 | inode->i_ino); |
561 | return; |
562 | } |
563 | reiserfs_write_lock(inode->i_sb); |
564 | |
565 | /* this is really only used for atime updates, so they don't have |
566 | ** to be included in O_SYNC or fsync |
567 | */ |
568 | err = journal_begin(&th, inode->i_sb, 1); |
569 | if (err) { |
570 | reiserfs_write_unlock(inode->i_sb); |
571 | return; |
572 | } |
573 | reiserfs_update_sd(&th, inode); |
574 | journal_end(&th, inode->i_sb, 1); |
575 | reiserfs_write_unlock(inode->i_sb); |
576 | } |
577 | |
578 | #ifdef CONFIG_QUOTA |
579 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
580 | size_t, loff_t); |
581 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, |
582 | loff_t); |
583 | #endif |
584 | |
585 | static const struct super_operations reiserfs_sops = { |
586 | .alloc_inode = reiserfs_alloc_inode, |
587 | .destroy_inode = reiserfs_destroy_inode, |
588 | .write_inode = reiserfs_write_inode, |
589 | .dirty_inode = reiserfs_dirty_inode, |
590 | .delete_inode = reiserfs_delete_inode, |
591 | .put_super = reiserfs_put_super, |
592 | .write_super = reiserfs_write_super, |
593 | .sync_fs = reiserfs_sync_fs, |
594 | .freeze_fs = reiserfs_freeze, |
595 | .unfreeze_fs = reiserfs_unfreeze, |
596 | .statfs = reiserfs_statfs, |
597 | .remount_fs = reiserfs_remount, |
598 | .show_options = generic_show_options, |
599 | #ifdef CONFIG_QUOTA |
600 | .quota_read = reiserfs_quota_read, |
601 | .quota_write = reiserfs_quota_write, |
602 | #endif |
603 | }; |
604 | |
605 | #ifdef CONFIG_QUOTA |
606 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
607 | |
608 | static int reiserfs_write_dquot(struct dquot *); |
609 | static int reiserfs_acquire_dquot(struct dquot *); |
610 | static int reiserfs_release_dquot(struct dquot *); |
611 | static int reiserfs_mark_dquot_dirty(struct dquot *); |
612 | static int reiserfs_write_info(struct super_block *, int); |
613 | static int reiserfs_quota_on(struct super_block *, int, int, char *, int); |
614 | |
615 | static struct dquot_operations reiserfs_quota_operations = { |
616 | .initialize = dquot_initialize, |
617 | .drop = dquot_drop, |
618 | .alloc_space = dquot_alloc_space, |
619 | .alloc_inode = dquot_alloc_inode, |
620 | .free_space = dquot_free_space, |
621 | .free_inode = dquot_free_inode, |
622 | .transfer = dquot_transfer, |
623 | .write_dquot = reiserfs_write_dquot, |
624 | .acquire_dquot = reiserfs_acquire_dquot, |
625 | .release_dquot = reiserfs_release_dquot, |
626 | .mark_dirty = reiserfs_mark_dquot_dirty, |
627 | .write_info = reiserfs_write_info, |
628 | .alloc_dquot = dquot_alloc, |
629 | .destroy_dquot = dquot_destroy, |
630 | }; |
631 | |
632 | static struct quotactl_ops reiserfs_qctl_operations = { |
633 | .quota_on = reiserfs_quota_on, |
634 | .quota_off = vfs_quota_off, |
635 | .quota_sync = vfs_quota_sync, |
636 | .get_info = vfs_get_dqinfo, |
637 | .set_info = vfs_set_dqinfo, |
638 | .get_dqblk = vfs_get_dqblk, |
639 | .set_dqblk = vfs_set_dqblk, |
640 | }; |
641 | #endif |
642 | |
643 | static const struct export_operations reiserfs_export_ops = { |
644 | .encode_fh = reiserfs_encode_fh, |
645 | .fh_to_dentry = reiserfs_fh_to_dentry, |
646 | .fh_to_parent = reiserfs_fh_to_parent, |
647 | .get_parent = reiserfs_get_parent, |
648 | }; |
649 | |
650 | /* this struct is used in reiserfs_getopt () for containing the value for those |
651 | mount options that have values rather than being toggles. */ |
652 | typedef struct { |
653 | char *value; |
654 | int setmask; /* bitmask which is to set on mount_options bitmask when this |
655 | value is found, 0 is no bits are to be changed. */ |
656 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this |
657 | value is found, 0 is no bits are to be changed. This is |
658 | applied BEFORE setmask */ |
659 | } arg_desc_t; |
660 | |
661 | /* Set this bit in arg_required to allow empty arguments */ |
662 | #define REISERFS_OPT_ALLOWEMPTY 31 |
663 | |
664 | /* this struct is used in reiserfs_getopt() for describing the set of reiserfs |
665 | mount options */ |
666 | typedef struct { |
667 | char *option_name; |
668 | int arg_required; /* 0 if argument is not required, not 0 otherwise */ |
669 | const arg_desc_t *values; /* list of values accepted by an option */ |
670 | int setmask; /* bitmask which is to set on mount_options bitmask when this |
671 | value is found, 0 is no bits are to be changed. */ |
672 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this |
673 | value is found, 0 is no bits are to be changed. This is |
674 | applied BEFORE setmask */ |
675 | } opt_desc_t; |
676 | |
677 | /* possible values for -o data= */ |
678 | static const arg_desc_t logging_mode[] = { |
679 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
680 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, |
681 | {"journal", 1 << REISERFS_DATA_LOG, |
682 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, |
683 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, |
684 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, |
685 | {.value = NULL} |
686 | }; |
687 | |
688 | /* possible values for -o barrier= */ |
689 | static const arg_desc_t barrier_mode[] = { |
690 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
691 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, |
692 | {.value = NULL} |
693 | }; |
694 | |
695 | /* possible values for "-o block-allocator=" and bits which are to be set in |
696 | s_mount_opt of reiserfs specific part of in-core super block */ |
697 | static const arg_desc_t balloc[] = { |
698 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
699 | {"border", 0, 1 << REISERFS_NO_BORDER}, |
700 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, |
701 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, |
702 | {"test4", 1 << REISERFS_TEST4, 0}, |
703 | {"notest4", 0, 1 << REISERFS_TEST4}, |
704 | {NULL, 0, 0} |
705 | }; |
706 | |
707 | static const arg_desc_t tails[] = { |
708 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
709 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, |
710 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, |
711 | {NULL, 0, 0} |
712 | }; |
713 | |
714 | static const arg_desc_t error_actions[] = { |
715 | {"panic", 1 << REISERFS_ERROR_PANIC, |
716 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, |
717 | {"ro-remount", 1 << REISERFS_ERROR_RO, |
718 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, |
719 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
720 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
721 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, |
722 | #endif |
723 | {NULL, 0, 0}, |
724 | }; |
725 | |
726 | /* proceed only one option from a list *cur - string containing of mount options |
727 | opts - array of options which are accepted |
728 | opt_arg - if option is found and requires an argument and if it is specifed |
729 | in the input - pointer to the argument is stored here |
730 | bit_flags - if option requires to set a certain bit - it is set here |
731 | return -1 if unknown option is found, opt->arg_required otherwise */ |
732 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
733 | char **opt_arg, unsigned long *bit_flags) |
734 | { |
735 | char *p; |
736 | /* foo=bar, |
737 | ^ ^ ^ |
738 | | | +-- option_end |
739 | | +-- arg_start |
740 | +-- option_start |
741 | */ |
742 | const opt_desc_t *opt; |
743 | const arg_desc_t *arg; |
744 | |
745 | p = *cur; |
746 | |
747 | /* assume argument cannot contain commas */ |
748 | *cur = strchr(p, ','); |
749 | if (*cur) { |
750 | *(*cur) = '\0'; |
751 | (*cur)++; |
752 | } |
753 | |
754 | if (!strncmp(p, "alloc=", 6)) { |
755 | /* Ugly special case, probably we should redo options parser so that |
756 | it can understand several arguments for some options, also so that |
757 | it can fill several bitfields with option values. */ |
758 | if (reiserfs_parse_alloc_options(s, p + 6)) { |
759 | return -1; |
760 | } else { |
761 | return 0; |
762 | } |
763 | } |
764 | |
765 | /* for every option in the list */ |
766 | for (opt = opts; opt->option_name; opt++) { |
767 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { |
768 | if (bit_flags) { |
769 | if (opt->clrmask == |
770 | (1 << REISERFS_UNSUPPORTED_OPT)) |
771 | reiserfs_warning(s, "super-6500", |
772 | "%s not supported.\n", |
773 | p); |
774 | else |
775 | *bit_flags &= ~opt->clrmask; |
776 | if (opt->setmask == |
777 | (1 << REISERFS_UNSUPPORTED_OPT)) |
778 | reiserfs_warning(s, "super-6501", |
779 | "%s not supported.\n", |
780 | p); |
781 | else |
782 | *bit_flags |= opt->setmask; |
783 | } |
784 | break; |
785 | } |
786 | } |
787 | if (!opt->option_name) { |
788 | reiserfs_warning(s, "super-6502", |
789 | "unknown mount option \"%s\"", p); |
790 | return -1; |
791 | } |
792 | |
793 | p += strlen(opt->option_name); |
794 | switch (*p) { |
795 | case '=': |
796 | if (!opt->arg_required) { |
797 | reiserfs_warning(s, "super-6503", |
798 | "the option \"%s\" does not " |
799 | "require an argument\n", |
800 | opt->option_name); |
801 | return -1; |
802 | } |
803 | break; |
804 | |
805 | case 0: |
806 | if (opt->arg_required) { |
807 | reiserfs_warning(s, "super-6504", |
808 | "the option \"%s\" requires an " |
809 | "argument\n", opt->option_name); |
810 | return -1; |
811 | } |
812 | break; |
813 | default: |
814 | reiserfs_warning(s, "super-6505", |
815 | "head of option \"%s\" is only correct\n", |
816 | opt->option_name); |
817 | return -1; |
818 | } |
819 | |
820 | /* move to the argument, or to next option if argument is not required */ |
821 | p++; |
822 | |
823 | if (opt->arg_required |
824 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) |
825 | && !strlen(p)) { |
826 | /* this catches "option=," if not allowed */ |
827 | reiserfs_warning(s, "super-6506", |
828 | "empty argument for \"%s\"\n", |
829 | opt->option_name); |
830 | return -1; |
831 | } |
832 | |
833 | if (!opt->values) { |
834 | /* *=NULLopt_arg contains pointer to argument */ |
835 | *opt_arg = p; |
836 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); |
837 | } |
838 | |
839 | /* values possible for this option are listed in opt->values */ |
840 | for (arg = opt->values; arg->value; arg++) { |
841 | if (!strcmp(p, arg->value)) { |
842 | if (bit_flags) { |
843 | *bit_flags &= ~arg->clrmask; |
844 | *bit_flags |= arg->setmask; |
845 | } |
846 | return opt->arg_required; |
847 | } |
848 | } |
849 | |
850 | reiserfs_warning(s, "super-6506", |
851 | "bad value \"%s\" for option \"%s\"\n", p, |
852 | opt->option_name); |
853 | return -1; |
854 | } |
855 | |
856 | /* returns 0 if something is wrong in option string, 1 - otherwise */ |
857 | static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */ |
858 | unsigned long *mount_options, |
859 | /* after the parsing phase, contains the |
860 | collection of bitflags defining what |
861 | mount options were selected. */ |
862 | unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */ |
863 | char **jdev_name, |
864 | unsigned int *commit_max_age, |
865 | char **qf_names, |
866 | unsigned int *qfmt) |
867 | { |
868 | int c; |
869 | char *arg = NULL; |
870 | char *pos; |
871 | opt_desc_t opts[] = { |
872 | /* Compatibility stuff, so that -o notail for old setups still work */ |
873 | {"tails",.arg_required = 't',.values = tails}, |
874 | {"notail",.clrmask = |
875 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, |
876 | {"conv",.setmask = 1 << REISERFS_CONVERT}, |
877 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, |
878 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, |
879 | {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, |
880 | #ifdef CONFIG_REISERFS_FS_XATTR |
881 | {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
882 | {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, |
883 | #else |
884 | {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
885 | {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
886 | #endif |
887 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
888 | {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
889 | {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, |
890 | #else |
891 | {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
892 | {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
893 | #endif |
894 | {.option_name = "nolog"}, |
895 | {"replayonly",.setmask = 1 << REPLAYONLY}, |
896 | {"block-allocator",.arg_required = 'a',.values = balloc}, |
897 | {"data",.arg_required = 'd',.values = logging_mode}, |
898 | {"barrier",.arg_required = 'b',.values = barrier_mode}, |
899 | {"resize",.arg_required = 'r',.values = NULL}, |
900 | {"jdev",.arg_required = 'j',.values = NULL}, |
901 | {"nolargeio",.arg_required = 'w',.values = NULL}, |
902 | {"commit",.arg_required = 'c',.values = NULL}, |
903 | {"usrquota",.setmask = 1 << REISERFS_QUOTA}, |
904 | {"grpquota",.setmask = 1 << REISERFS_QUOTA}, |
905 | {"noquota",.clrmask = 1 << REISERFS_QUOTA}, |
906 | {"errors",.arg_required = 'e',.values = error_actions}, |
907 | {"usrjquota",.arg_required = |
908 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, |
909 | {"grpjquota",.arg_required = |
910 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, |
911 | {"jqfmt",.arg_required = 'f',.values = NULL}, |
912 | {.option_name = NULL} |
913 | }; |
914 | |
915 | *blocks = 0; |
916 | if (!options || !*options) |
917 | /* use default configuration: create tails, journaling on, no |
918 | conversion to newest format */ |
919 | return 1; |
920 | |
921 | for (pos = options; pos;) { |
922 | c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); |
923 | if (c == -1) |
924 | /* wrong option is given */ |
925 | return 0; |
926 | |
927 | if (c == 'r') { |
928 | char *p; |
929 | |
930 | p = NULL; |
931 | /* "resize=NNN" or "resize=auto" */ |
932 | |
933 | if (!strcmp(arg, "auto")) { |
934 | /* From JFS code, to auto-get the size. */ |
935 | *blocks = |
936 | s->s_bdev->bd_inode->i_size >> s-> |
937 | s_blocksize_bits; |
938 | } else { |
939 | *blocks = simple_strtoul(arg, &p, 0); |
940 | if (*p != '\0') { |
941 | /* NNN does not look like a number */ |
942 | reiserfs_warning(s, "super-6507", |
943 | "bad value %s for " |
944 | "-oresize\n", arg); |
945 | return 0; |
946 | } |
947 | } |
948 | } |
949 | |
950 | if (c == 'c') { |
951 | char *p = NULL; |
952 | unsigned long val = simple_strtoul(arg, &p, 0); |
953 | /* commit=NNN (time in seconds) */ |
954 | if (*p != '\0' || val >= (unsigned int)-1) { |
955 | reiserfs_warning(s, "super-6508", |
956 | "bad value %s for -ocommit\n", |
957 | arg); |
958 | return 0; |
959 | } |
960 | *commit_max_age = (unsigned int)val; |
961 | } |
962 | |
963 | if (c == 'w') { |
964 | reiserfs_warning(s, "super-6509", "nolargeio option " |
965 | "is no longer supported"); |
966 | return 0; |
967 | } |
968 | |
969 | if (c == 'j') { |
970 | if (arg && *arg && jdev_name) { |
971 | if (*jdev_name) { //Hm, already assigned? |
972 | reiserfs_warning(s, "super-6510", |
973 | "journal device was " |
974 | "already specified to " |
975 | "be %s", *jdev_name); |
976 | return 0; |
977 | } |
978 | *jdev_name = arg; |
979 | } |
980 | } |
981 | #ifdef CONFIG_QUOTA |
982 | if (c == 'u' || c == 'g') { |
983 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; |
984 | |
985 | if (sb_any_quota_loaded(s) && |
986 | (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { |
987 | reiserfs_warning(s, "super-6511", |
988 | "cannot change journaled " |
989 | "quota options when quota " |
990 | "turned on."); |
991 | return 0; |
992 | } |
993 | if (*arg) { /* Some filename specified? */ |
994 | if (REISERFS_SB(s)->s_qf_names[qtype] |
995 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], |
996 | arg)) { |
997 | reiserfs_warning(s, "super-6512", |
998 | "%s quota file " |
999 | "already specified.", |
1000 | QTYPE2NAME(qtype)); |
1001 | return 0; |
1002 | } |
1003 | if (strchr(arg, '/')) { |
1004 | reiserfs_warning(s, "super-6513", |
1005 | "quotafile must be " |
1006 | "on filesystem root."); |
1007 | return 0; |
1008 | } |
1009 | qf_names[qtype] = |
1010 | kmalloc(strlen(arg) + 1, GFP_KERNEL); |
1011 | if (!qf_names[qtype]) { |
1012 | reiserfs_warning(s, "reiserfs-2502", |
1013 | "not enough memory " |
1014 | "for storing " |
1015 | "quotafile name."); |
1016 | return 0; |
1017 | } |
1018 | strcpy(qf_names[qtype], arg); |
1019 | *mount_options |= 1 << REISERFS_QUOTA; |
1020 | } else { |
1021 | if (qf_names[qtype] != |
1022 | REISERFS_SB(s)->s_qf_names[qtype]) |
1023 | kfree(qf_names[qtype]); |
1024 | qf_names[qtype] = NULL; |
1025 | } |
1026 | } |
1027 | if (c == 'f') { |
1028 | if (!strcmp(arg, "vfsold")) |
1029 | *qfmt = QFMT_VFS_OLD; |
1030 | else if (!strcmp(arg, "vfsv0")) |
1031 | *qfmt = QFMT_VFS_V0; |
1032 | else { |
1033 | reiserfs_warning(s, "super-6514", |
1034 | "unknown quota format " |
1035 | "specified."); |
1036 | return 0; |
1037 | } |
1038 | if (sb_any_quota_loaded(s) && |
1039 | *qfmt != REISERFS_SB(s)->s_jquota_fmt) { |
1040 | reiserfs_warning(s, "super-6515", |
1041 | "cannot change journaled " |
1042 | "quota options when quota " |
1043 | "turned on."); |
1044 | return 0; |
1045 | } |
1046 | } |
1047 | #else |
1048 | if (c == 'u' || c == 'g' || c == 'f') { |
1049 | reiserfs_warning(s, "reiserfs-2503", "journaled " |
1050 | "quota options not supported."); |
1051 | return 0; |
1052 | } |
1053 | #endif |
1054 | } |
1055 | |
1056 | #ifdef CONFIG_QUOTA |
1057 | if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
1058 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { |
1059 | reiserfs_warning(s, "super-6515", |
1060 | "journaled quota format not specified."); |
1061 | return 0; |
1062 | } |
1063 | /* This checking is not precise wrt the quota type but for our purposes it is sufficient */ |
1064 | if (!(*mount_options & (1 << REISERFS_QUOTA)) |
1065 | && sb_any_quota_loaded(s)) { |
1066 | reiserfs_warning(s, "super-6516", "quota options must " |
1067 | "be present when quota is turned on."); |
1068 | return 0; |
1069 | } |
1070 | #endif |
1071 | |
1072 | return 1; |
1073 | } |
1074 | |
1075 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1076 | { |
1077 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | |
1078 | (1 << REISERFS_DATA_ORDERED) | |
1079 | (1 << REISERFS_DATA_WRITEBACK)); |
1080 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); |
1081 | } |
1082 | |
1083 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) |
1084 | { |
1085 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1086 | if (!reiserfs_data_log(s)) { |
1087 | switch_data_mode(s, REISERFS_DATA_LOG); |
1088 | reiserfs_info(s, "switching to journaled data mode\n"); |
1089 | } |
1090 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { |
1091 | if (!reiserfs_data_ordered(s)) { |
1092 | switch_data_mode(s, REISERFS_DATA_ORDERED); |
1093 | reiserfs_info(s, "switching to ordered data mode\n"); |
1094 | } |
1095 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { |
1096 | if (!reiserfs_data_writeback(s)) { |
1097 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); |
1098 | reiserfs_info(s, "switching to writeback data mode\n"); |
1099 | } |
1100 | } |
1101 | } |
1102 | |
1103 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1104 | { |
1105 | int flush = (1 << REISERFS_BARRIER_FLUSH); |
1106 | int none = (1 << REISERFS_BARRIER_NONE); |
1107 | int all_barrier = flush | none; |
1108 | |
1109 | if (bits & all_barrier) { |
1110 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; |
1111 | if (bits & flush) { |
1112 | REISERFS_SB(s)->s_mount_opt |= flush; |
1113 | printk("reiserfs: enabling write barrier flush mode\n"); |
1114 | } else if (bits & none) { |
1115 | REISERFS_SB(s)->s_mount_opt |= none; |
1116 | printk("reiserfs: write barriers turned off\n"); |
1117 | } |
1118 | } |
1119 | } |
1120 | |
1121 | static void handle_attrs(struct super_block *s) |
1122 | { |
1123 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1124 | |
1125 | if (reiserfs_attrs(s)) { |
1126 | if (old_format_only(s)) { |
1127 | reiserfs_warning(s, "super-6517", "cannot support " |
1128 | "attributes on 3.5.x disk format"); |
1129 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1130 | return; |
1131 | } |
1132 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
1133 | reiserfs_warning(s, "super-6518", "cannot support " |
1134 | "attributes until flag is set in " |
1135 | "super-block"); |
1136 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1137 | } |
1138 | } |
1139 | } |
1140 | |
1141 | #ifdef CONFIG_QUOTA |
1142 | static void handle_quota_files(struct super_block *s, char **qf_names, |
1143 | unsigned int *qfmt) |
1144 | { |
1145 | int i; |
1146 | |
1147 | for (i = 0; i < MAXQUOTAS; i++) { |
1148 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) |
1149 | kfree(REISERFS_SB(s)->s_qf_names[i]); |
1150 | REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; |
1151 | } |
1152 | REISERFS_SB(s)->s_jquota_fmt = *qfmt; |
1153 | } |
1154 | #endif |
1155 | |
1156 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1157 | { |
1158 | struct reiserfs_super_block *rs; |
1159 | struct reiserfs_transaction_handle th; |
1160 | unsigned long blocks; |
1161 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; |
1162 | unsigned long safe_mask = 0; |
1163 | unsigned int commit_max_age = (unsigned int)-1; |
1164 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
1165 | char *new_opts = kstrdup(arg, GFP_KERNEL); |
1166 | int err; |
1167 | char *qf_names[MAXQUOTAS]; |
1168 | unsigned int qfmt = 0; |
1169 | #ifdef CONFIG_QUOTA |
1170 | int i; |
1171 | |
1172 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); |
1173 | #endif |
1174 | |
1175 | lock_kernel(); |
1176 | rs = SB_DISK_SUPER_BLOCK(s); |
1177 | |
1178 | if (!reiserfs_parse_options |
1179 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
1180 | qf_names, &qfmt)) { |
1181 | #ifdef CONFIG_QUOTA |
1182 | for (i = 0; i < MAXQUOTAS; i++) |
1183 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) |
1184 | kfree(qf_names[i]); |
1185 | #endif |
1186 | err = -EINVAL; |
1187 | goto out_err; |
1188 | } |
1189 | #ifdef CONFIG_QUOTA |
1190 | handle_quota_files(s, qf_names, &qfmt); |
1191 | #endif |
1192 | |
1193 | handle_attrs(s); |
1194 | |
1195 | /* Add options that are safe here */ |
1196 | safe_mask |= 1 << REISERFS_SMALLTAIL; |
1197 | safe_mask |= 1 << REISERFS_LARGETAIL; |
1198 | safe_mask |= 1 << REISERFS_NO_BORDER; |
1199 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; |
1200 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; |
1201 | safe_mask |= 1 << REISERFS_TEST4; |
1202 | safe_mask |= 1 << REISERFS_ATTRS; |
1203 | safe_mask |= 1 << REISERFS_XATTRS_USER; |
1204 | safe_mask |= 1 << REISERFS_POSIXACL; |
1205 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; |
1206 | safe_mask |= 1 << REISERFS_BARRIER_NONE; |
1207 | safe_mask |= 1 << REISERFS_ERROR_RO; |
1208 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; |
1209 | safe_mask |= 1 << REISERFS_ERROR_PANIC; |
1210 | safe_mask |= 1 << REISERFS_QUOTA; |
1211 | |
1212 | /* Update the bitmask, taking care to keep |
1213 | * the bits we're not allowed to change here */ |
1214 | REISERFS_SB(s)->s_mount_opt = |
1215 | (REISERFS_SB(s)-> |
1216 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); |
1217 | |
1218 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { |
1219 | journal->j_max_commit_age = commit_max_age; |
1220 | journal->j_max_trans_age = commit_max_age; |
1221 | } else if (commit_max_age == 0) { |
1222 | /* 0 means restore defaults. */ |
1223 | journal->j_max_commit_age = journal->j_default_max_commit_age; |
1224 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; |
1225 | } |
1226 | |
1227 | if (blocks) { |
1228 | err = reiserfs_resize(s, blocks); |
1229 | if (err != 0) |
1230 | goto out_err; |
1231 | } |
1232 | |
1233 | if (*mount_flags & MS_RDONLY) { |
1234 | reiserfs_xattr_init(s, *mount_flags); |
1235 | /* remount read-only */ |
1236 | if (s->s_flags & MS_RDONLY) |
1237 | /* it is read-only already */ |
1238 | goto out_ok; |
1239 | /* try to remount file system with read-only permissions */ |
1240 | if (sb_umount_state(rs) == REISERFS_VALID_FS |
1241 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { |
1242 | goto out_ok; |
1243 | } |
1244 | |
1245 | err = journal_begin(&th, s, 10); |
1246 | if (err) |
1247 | goto out_err; |
1248 | |
1249 | /* Mounting a rw partition read-only. */ |
1250 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
1251 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); |
1252 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
1253 | } else { |
1254 | /* remount read-write */ |
1255 | if (!(s->s_flags & MS_RDONLY)) { |
1256 | reiserfs_xattr_init(s, *mount_flags); |
1257 | goto out_ok; /* We are read-write already */ |
1258 | } |
1259 | |
1260 | if (reiserfs_is_journal_aborted(journal)) { |
1261 | err = journal->j_errno; |
1262 | goto out_err; |
1263 | } |
1264 | |
1265 | handle_data_mode(s, mount_options); |
1266 | handle_barrier_mode(s, mount_options); |
1267 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); |
1268 | s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ |
1269 | err = journal_begin(&th, s, 10); |
1270 | if (err) |
1271 | goto out_err; |
1272 | |
1273 | /* Mount a partition which is read-only, read-write */ |
1274 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
1275 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); |
1276 | s->s_flags &= ~MS_RDONLY; |
1277 | set_sb_umount_state(rs, REISERFS_ERROR_FS); |
1278 | if (!old_format_only(s)) |
1279 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); |
1280 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
1281 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
1282 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; |
1283 | } |
1284 | /* this will force a full flush of all journal lists */ |
1285 | SB_JOURNAL(s)->j_must_wait = 1; |
1286 | err = journal_end(&th, s, 10); |
1287 | if (err) |
1288 | goto out_err; |
1289 | s->s_dirt = 0; |
1290 | |
1291 | if (!(*mount_flags & MS_RDONLY)) { |
1292 | finish_unfinished(s); |
1293 | reiserfs_xattr_init(s, *mount_flags); |
1294 | } |
1295 | |
1296 | out_ok: |
1297 | replace_mount_options(s, new_opts); |
1298 | unlock_kernel(); |
1299 | return 0; |
1300 | |
1301 | out_err: |
1302 | kfree(new_opts); |
1303 | unlock_kernel(); |
1304 | return err; |
1305 | } |
1306 | |
1307 | static int read_super_block(struct super_block *s, int offset) |
1308 | { |
1309 | struct buffer_head *bh; |
1310 | struct reiserfs_super_block *rs; |
1311 | int fs_blocksize; |
1312 | |
1313 | bh = sb_bread(s, offset / s->s_blocksize); |
1314 | if (!bh) { |
1315 | reiserfs_warning(s, "sh-2006", |
1316 | "bread failed (dev %s, block %lu, size %lu)", |
1317 | reiserfs_bdevname(s), offset / s->s_blocksize, |
1318 | s->s_blocksize); |
1319 | return 1; |
1320 | } |
1321 | |
1322 | rs = (struct reiserfs_super_block *)bh->b_data; |
1323 | if (!is_any_reiserfs_magic_string(rs)) { |
1324 | brelse(bh); |
1325 | return 1; |
1326 | } |
1327 | // |
1328 | // ok, reiserfs signature (old or new) found in at the given offset |
1329 | // |
1330 | fs_blocksize = sb_blocksize(rs); |
1331 | brelse(bh); |
1332 | sb_set_blocksize(s, fs_blocksize); |
1333 | |
1334 | bh = sb_bread(s, offset / s->s_blocksize); |
1335 | if (!bh) { |
1336 | reiserfs_warning(s, "sh-2007", |
1337 | "bread failed (dev %s, block %lu, size %lu)", |
1338 | reiserfs_bdevname(s), offset / s->s_blocksize, |
1339 | s->s_blocksize); |
1340 | return 1; |
1341 | } |
1342 | |
1343 | rs = (struct reiserfs_super_block *)bh->b_data; |
1344 | if (sb_blocksize(rs) != s->s_blocksize) { |
1345 | reiserfs_warning(s, "sh-2011", "can't find a reiserfs " |
1346 | "filesystem on (dev %s, block %Lu, size %lu)", |
1347 | reiserfs_bdevname(s), |
1348 | (unsigned long long)bh->b_blocknr, |
1349 | s->s_blocksize); |
1350 | brelse(bh); |
1351 | return 1; |
1352 | } |
1353 | |
1354 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
1355 | brelse(bh); |
1356 | reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " |
1357 | "--rebuild-tree run detected. Please run\n" |
1358 | "reiserfsck --rebuild-tree and wait for a " |
1359 | "completion. If that fails\n" |
1360 | "get newer reiserfsprogs package"); |
1361 | return 1; |
1362 | } |
1363 | |
1364 | SB_BUFFER_WITH_SB(s) = bh; |
1365 | SB_DISK_SUPER_BLOCK(s) = rs; |
1366 | |
1367 | if (is_reiserfs_jr(rs)) { |
1368 | /* magic is of non-standard journal filesystem, look at s_version to |
1369 | find which format is in use */ |
1370 | if (sb_version(rs) == REISERFS_VERSION_2) |
1371 | reiserfs_info(s, "found reiserfs format \"3.6\"" |
1372 | " with non-standard journal\n"); |
1373 | else if (sb_version(rs) == REISERFS_VERSION_1) |
1374 | reiserfs_info(s, "found reiserfs format \"3.5\"" |
1375 | " with non-standard journal\n"); |
1376 | else { |
1377 | reiserfs_warning(s, "sh-2012", "found unknown " |
1378 | "format \"%u\" of reiserfs with " |
1379 | "non-standard magic", sb_version(rs)); |
1380 | return 1; |
1381 | } |
1382 | } else |
1383 | /* s_version of standard format may contain incorrect information, |
1384 | so we just look at the magic string */ |
1385 | reiserfs_info(s, |
1386 | "found reiserfs format \"%s\" with standard journal\n", |
1387 | is_reiserfs_3_5(rs) ? "3.5" : "3.6"); |
1388 | |
1389 | s->s_op = &reiserfs_sops; |
1390 | s->s_export_op = &reiserfs_export_ops; |
1391 | #ifdef CONFIG_QUOTA |
1392 | s->s_qcop = &reiserfs_qctl_operations; |
1393 | s->dq_op = &reiserfs_quota_operations; |
1394 | #endif |
1395 | |
1396 | /* new format is limited by the 32 bit wide i_blocks field, want to |
1397 | ** be one full block below that. |
1398 | */ |
1399 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; |
1400 | return 0; |
1401 | } |
1402 | |
1403 | /* after journal replay, reread all bitmap and super blocks */ |
1404 | static int reread_meta_blocks(struct super_block *s) |
1405 | { |
1406 | ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))); |
1407 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); |
1408 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { |
1409 | reiserfs_warning(s, "reiserfs-2504", "error reading the super"); |
1410 | return 1; |
1411 | } |
1412 | |
1413 | return 0; |
1414 | } |
1415 | |
1416 | ///////////////////////////////////////////////////// |
1417 | // hash detection stuff |
1418 | |
1419 | // if root directory is empty - we set default - Yura's - hash and |
1420 | // warn about it |
1421 | // FIXME: we look for only one name in a directory. If tea and yura |
1422 | // bith have the same value - we ask user to send report to the |
1423 | // mailing list |
1424 | static __u32 find_hash_out(struct super_block *s) |
1425 | { |
1426 | int retval; |
1427 | struct inode *inode; |
1428 | struct cpu_key key; |
1429 | INITIALIZE_PATH(path); |
1430 | struct reiserfs_dir_entry de; |
1431 | __u32 hash = DEFAULT_HASH; |
1432 | |
1433 | inode = s->s_root->d_inode; |
1434 | |
1435 | do { // Some serious "goto"-hater was there ;) |
1436 | u32 teahash, r5hash, yurahash; |
1437 | |
1438 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); |
1439 | retval = search_by_entry_key(s, &key, &path, &de); |
1440 | if (retval == IO_ERROR) { |
1441 | pathrelse(&path); |
1442 | return UNSET_HASH; |
1443 | } |
1444 | if (retval == NAME_NOT_FOUND) |
1445 | de.de_entry_num--; |
1446 | set_de_name_and_namelen(&de); |
1447 | if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) { |
1448 | /* allow override in this case */ |
1449 | if (reiserfs_rupasov_hash(s)) { |
1450 | hash = YURA_HASH; |
1451 | } |
1452 | reiserfs_info(s, "FS seems to be empty, autodetect " |
1453 | "is using the default hash\n"); |
1454 | break; |
1455 | } |
1456 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); |
1457 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); |
1458 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); |
1459 | if (((teahash == r5hash) |
1460 | && |
1461 | (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) |
1462 | == r5hash)) || ((teahash == yurahash) |
1463 | && (yurahash == |
1464 | GET_HASH_VALUE(deh_offset |
1465 | (& |
1466 | (de. |
1467 | de_deh[de. |
1468 | de_entry_num]))))) |
1469 | || ((r5hash == yurahash) |
1470 | && (yurahash == |
1471 | GET_HASH_VALUE(deh_offset |
1472 | (&(de.de_deh[de.de_entry_num])))))) { |
1473 | reiserfs_warning(s, "reiserfs-2506", "Unable to " |
1474 | "automatically detect hash function. " |
1475 | "Please mount with -o " |
1476 | "hash={tea,rupasov,r5}"); |
1477 | hash = UNSET_HASH; |
1478 | break; |
1479 | } |
1480 | if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) == |
1481 | yurahash) |
1482 | hash = YURA_HASH; |
1483 | else if (GET_HASH_VALUE |
1484 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) |
1485 | hash = TEA_HASH; |
1486 | else if (GET_HASH_VALUE |
1487 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) |
1488 | hash = R5_HASH; |
1489 | else { |
1490 | reiserfs_warning(s, "reiserfs-2506", |
1491 | "Unrecognised hash function"); |
1492 | hash = UNSET_HASH; |
1493 | } |
1494 | } while (0); |
1495 | |
1496 | pathrelse(&path); |
1497 | return hash; |
1498 | } |
1499 | |
1500 | // finds out which hash names are sorted with |
1501 | static int what_hash(struct super_block *s) |
1502 | { |
1503 | __u32 code; |
1504 | |
1505 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); |
1506 | |
1507 | /* reiserfs_hash_detect() == true if any of the hash mount options |
1508 | ** were used. We must check them to make sure the user isn't |
1509 | ** using a bad hash value |
1510 | */ |
1511 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) |
1512 | code = find_hash_out(s); |
1513 | |
1514 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { |
1515 | /* detection has found the hash, and we must check against the |
1516 | ** mount options |
1517 | */ |
1518 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { |
1519 | reiserfs_warning(s, "reiserfs-2507", |
1520 | "Error, %s hash detected, " |
1521 | "unable to force rupasov hash", |
1522 | reiserfs_hashname(code)); |
1523 | code = UNSET_HASH; |
1524 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { |
1525 | reiserfs_warning(s, "reiserfs-2508", |
1526 | "Error, %s hash detected, " |
1527 | "unable to force tea hash", |
1528 | reiserfs_hashname(code)); |
1529 | code = UNSET_HASH; |
1530 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { |
1531 | reiserfs_warning(s, "reiserfs-2509", |
1532 | "Error, %s hash detected, " |
1533 | "unable to force r5 hash", |
1534 | reiserfs_hashname(code)); |
1535 | code = UNSET_HASH; |
1536 | } |
1537 | } else { |
1538 | /* find_hash_out was not called or could not determine the hash */ |
1539 | if (reiserfs_rupasov_hash(s)) { |
1540 | code = YURA_HASH; |
1541 | } else if (reiserfs_tea_hash(s)) { |
1542 | code = TEA_HASH; |
1543 | } else if (reiserfs_r5_hash(s)) { |
1544 | code = R5_HASH; |
1545 | } |
1546 | } |
1547 | |
1548 | /* if we are mounted RW, and we have a new valid hash code, update |
1549 | ** the super |
1550 | */ |
1551 | if (code != UNSET_HASH && |
1552 | !(s->s_flags & MS_RDONLY) && |
1553 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { |
1554 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); |
1555 | } |
1556 | return code; |
1557 | } |
1558 | |
1559 | // return pointer to appropriate function |
1560 | static hashf_t hash_function(struct super_block *s) |
1561 | { |
1562 | switch (what_hash(s)) { |
1563 | case TEA_HASH: |
1564 | reiserfs_info(s, "Using tea hash to sort names\n"); |
1565 | return keyed_hash; |
1566 | case YURA_HASH: |
1567 | reiserfs_info(s, "Using rupasov hash to sort names\n"); |
1568 | return yura_hash; |
1569 | case R5_HASH: |
1570 | reiserfs_info(s, "Using r5 hash to sort names\n"); |
1571 | return r5_hash; |
1572 | } |
1573 | return NULL; |
1574 | } |
1575 | |
1576 | // this is used to set up correct value for old partitions |
1577 | static int function2code(hashf_t func) |
1578 | { |
1579 | if (func == keyed_hash) |
1580 | return TEA_HASH; |
1581 | if (func == yura_hash) |
1582 | return YURA_HASH; |
1583 | if (func == r5_hash) |
1584 | return R5_HASH; |
1585 | |
1586 | BUG(); // should never happen |
1587 | |
1588 | return 0; |
1589 | } |
1590 | |
1591 | #define SWARN(silent, s, id, ...) \ |
1592 | if (!(silent)) \ |
1593 | reiserfs_warning(s, id, __VA_ARGS__) |
1594 | |
1595 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1596 | { |
1597 | struct inode *root_inode; |
1598 | struct reiserfs_transaction_handle th; |
1599 | int old_format = 0; |
1600 | unsigned long blocks; |
1601 | unsigned int commit_max_age = 0; |
1602 | int jinit_done = 0; |
1603 | struct reiserfs_iget_args args; |
1604 | struct reiserfs_super_block *rs; |
1605 | char *jdev_name; |
1606 | struct reiserfs_sb_info *sbi; |
1607 | int errval = -EINVAL; |
1608 | char *qf_names[MAXQUOTAS] = {}; |
1609 | unsigned int qfmt = 0; |
1610 | |
1611 | save_mount_options(s, data); |
1612 | |
1613 | sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
1614 | if (!sbi) { |
1615 | errval = -ENOMEM; |
1616 | goto error; |
1617 | } |
1618 | s->s_fs_info = sbi; |
1619 | /* Set default values for options: non-aggressive tails, RO on errors */ |
1620 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); |
1621 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); |
1622 | /* no preallocation minimum, be smart in |
1623 | reiserfs_file_write instead */ |
1624 | REISERFS_SB(s)->s_alloc_options.preallocmin = 0; |
1625 | /* Preallocate by 16 blocks (17-1) at once */ |
1626 | REISERFS_SB(s)->s_alloc_options.preallocsize = 17; |
1627 | /* setup default block allocator options */ |
1628 | reiserfs_init_alloc_options(s); |
1629 | |
1630 | jdev_name = NULL; |
1631 | if (reiserfs_parse_options |
1632 | (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name, |
1633 | &commit_max_age, qf_names, &qfmt) == 0) { |
1634 | goto error; |
1635 | } |
1636 | #ifdef CONFIG_QUOTA |
1637 | handle_quota_files(s, qf_names, &qfmt); |
1638 | #endif |
1639 | |
1640 | if (blocks) { |
1641 | SWARN(silent, s, "jmacd-7", "resize option for remount only"); |
1642 | goto error; |
1643 | } |
1644 | |
1645 | /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ |
1646 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) |
1647 | old_format = 1; |
1648 | /* try new format (64-th 1k block), which can contain reiserfs super block */ |
1649 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { |
1650 | SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", |
1651 | reiserfs_bdevname(s)); |
1652 | goto error; |
1653 | } |
1654 | |
1655 | rs = SB_DISK_SUPER_BLOCK(s); |
1656 | /* Let's do basic sanity check to verify that underlying device is not |
1657 | smaller than the filesystem. If the check fails then abort and scream, |
1658 | because bad stuff will happen otherwise. */ |
1659 | if (s->s_bdev && s->s_bdev->bd_inode |
1660 | && i_size_read(s->s_bdev->bd_inode) < |
1661 | sb_block_count(rs) * sb_blocksize(rs)) { |
1662 | SWARN(silent, s, "", "Filesystem cannot be " |
1663 | "mounted because it is bigger than the device"); |
1664 | SWARN(silent, s, "", "You may need to run fsck " |
1665 | "or increase size of your LVM partition"); |
1666 | SWARN(silent, s, "", "Or may be you forgot to " |
1667 | "reboot after fdisk when it told you to"); |
1668 | goto error; |
1669 | } |
1670 | |
1671 | sbi->s_mount_state = SB_REISERFS_STATE(s); |
1672 | sbi->s_mount_state = REISERFS_VALID_FS; |
1673 | |
1674 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
1675 | SWARN(silent, s, "jmacd-8", "unable to read bitmap"); |
1676 | goto error; |
1677 | } |
1678 | errval = -EINVAL; |
1679 | #ifdef CONFIG_REISERFS_CHECK |
1680 | SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); |
1681 | SWARN(silent, s, "", "- it is slow mode for debugging."); |
1682 | #endif |
1683 | |
1684 | /* make data=ordered the default */ |
1685 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && |
1686 | !reiserfs_data_writeback(s)) { |
1687 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); |
1688 | } |
1689 | |
1690 | if (reiserfs_data_log(s)) { |
1691 | reiserfs_info(s, "using journaled data mode\n"); |
1692 | } else if (reiserfs_data_ordered(s)) { |
1693 | reiserfs_info(s, "using ordered data mode\n"); |
1694 | } else { |
1695 | reiserfs_info(s, "using writeback data mode\n"); |
1696 | } |
1697 | if (reiserfs_barrier_flush(s)) { |
1698 | printk("reiserfs: using flush barriers\n"); |
1699 | } |
1700 | // set_device_ro(s->s_dev, 1) ; |
1701 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { |
1702 | SWARN(silent, s, "sh-2022", |
1703 | "unable to initialize journal space"); |
1704 | goto error; |
1705 | } else { |
1706 | jinit_done = 1; /* once this is set, journal_release must be called |
1707 | ** if we error out of the mount |
1708 | */ |
1709 | } |
1710 | if (reread_meta_blocks(s)) { |
1711 | SWARN(silent, s, "jmacd-9", |
1712 | "unable to reread meta blocks after journal init"); |
1713 | goto error; |
1714 | } |
1715 | |
1716 | if (replay_only(s)) |
1717 | goto error; |
1718 | |
1719 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { |
1720 | SWARN(silent, s, "clm-7000", |
1721 | "Detected readonly device, marking FS readonly"); |
1722 | s->s_flags |= MS_RDONLY; |
1723 | } |
1724 | args.objectid = REISERFS_ROOT_OBJECTID; |
1725 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; |
1726 | root_inode = |
1727 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, |
1728 | reiserfs_init_locked_inode, (void *)(&args)); |
1729 | if (!root_inode) { |
1730 | SWARN(silent, s, "jmacd-10", "get root inode failed"); |
1731 | goto error; |
1732 | } |
1733 | |
1734 | if (root_inode->i_state & I_NEW) { |
1735 | reiserfs_read_locked_inode(root_inode, &args); |
1736 | unlock_new_inode(root_inode); |
1737 | } |
1738 | |
1739 | s->s_root = d_alloc_root(root_inode); |
1740 | if (!s->s_root) { |
1741 | iput(root_inode); |
1742 | goto error; |
1743 | } |
1744 | // define and initialize hash function |
1745 | sbi->s_hash_function = hash_function(s); |
1746 | if (sbi->s_hash_function == NULL) { |
1747 | dput(s->s_root); |
1748 | s->s_root = NULL; |
1749 | goto error; |
1750 | } |
1751 | |
1752 | if (is_reiserfs_3_5(rs) |
1753 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) |
1754 | set_bit(REISERFS_3_5, &(sbi->s_properties)); |
1755 | else if (old_format) |
1756 | set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties)); |
1757 | else |
1758 | set_bit(REISERFS_3_6, &(sbi->s_properties)); |
1759 | |
1760 | if (!(s->s_flags & MS_RDONLY)) { |
1761 | |
1762 | errval = journal_begin(&th, s, 1); |
1763 | if (errval) { |
1764 | dput(s->s_root); |
1765 | s->s_root = NULL; |
1766 | goto error; |
1767 | } |
1768 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); |
1769 | |
1770 | set_sb_umount_state(rs, REISERFS_ERROR_FS); |
1771 | set_sb_fs_state(rs, 0); |
1772 | |
1773 | /* Clear out s_bmap_nr if it would wrap. We can handle this |
1774 | * case, but older revisions can't. This will cause the |
1775 | * file system to fail mount on those older implementations, |
1776 | * avoiding corruption. -jeffm */ |
1777 | if (bmap_would_wrap(reiserfs_bmap_count(s)) && |
1778 | sb_bmap_nr(rs) != 0) { |
1779 | reiserfs_warning(s, "super-2030", "This file system " |
1780 | "claims to use %u bitmap blocks in " |
1781 | "its super block, but requires %u. " |
1782 | "Clearing to zero.", sb_bmap_nr(rs), |
1783 | reiserfs_bmap_count(s)); |
1784 | |
1785 | set_sb_bmap_nr(rs, 0); |
1786 | } |
1787 | |
1788 | if (old_format_only(s)) { |
1789 | /* filesystem of format 3.5 either with standard or non-standard |
1790 | journal */ |
1791 | if (convert_reiserfs(s)) { |
1792 | /* and -o conv is given */ |
1793 | if (!silent) |
1794 | reiserfs_info(s, |
1795 | "converting 3.5 filesystem to the 3.6 format"); |
1796 | |
1797 | if (is_reiserfs_3_5(rs)) |
1798 | /* put magic string of 3.6 format. 2.2 will not be able to |
1799 | mount this filesystem anymore */ |
1800 | memcpy(rs->s_v1.s_magic, |
1801 | reiserfs_3_6_magic_string, |
1802 | sizeof |
1803 | (reiserfs_3_6_magic_string)); |
1804 | |
1805 | set_sb_version(rs, REISERFS_VERSION_2); |
1806 | reiserfs_convert_objectid_map_v1(s); |
1807 | set_bit(REISERFS_3_6, &(sbi->s_properties)); |
1808 | clear_bit(REISERFS_3_5, &(sbi->s_properties)); |
1809 | } else if (!silent) { |
1810 | reiserfs_info(s, "using 3.5.x disk format\n"); |
1811 | } |
1812 | } else |
1813 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); |
1814 | |
1815 | |
1816 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); |
1817 | errval = journal_end(&th, s, 1); |
1818 | if (errval) { |
1819 | dput(s->s_root); |
1820 | s->s_root = NULL; |
1821 | goto error; |
1822 | } |
1823 | |
1824 | if ((errval = reiserfs_lookup_privroot(s)) || |
1825 | (errval = reiserfs_xattr_init(s, s->s_flags))) { |
1826 | dput(s->s_root); |
1827 | s->s_root = NULL; |
1828 | goto error; |
1829 | } |
1830 | |
1831 | /* look for files which were to be removed in previous session */ |
1832 | finish_unfinished(s); |
1833 | } else { |
1834 | if (old_format_only(s) && !silent) { |
1835 | reiserfs_info(s, "using 3.5.x disk format\n"); |
1836 | } |
1837 | |
1838 | if ((errval = reiserfs_lookup_privroot(s)) || |
1839 | (errval = reiserfs_xattr_init(s, s->s_flags))) { |
1840 | dput(s->s_root); |
1841 | s->s_root = NULL; |
1842 | goto error; |
1843 | } |
1844 | } |
1845 | // mark hash in super block: it could be unset. overwrite should be ok |
1846 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); |
1847 | |
1848 | handle_attrs(s); |
1849 | |
1850 | reiserfs_proc_info_init(s); |
1851 | |
1852 | init_waitqueue_head(&(sbi->s_wait)); |
1853 | spin_lock_init(&sbi->bitmap_lock); |
1854 | |
1855 | return (0); |
1856 | |
1857 | error: |
1858 | if (jinit_done) { /* kill the commit thread, free journal ram */ |
1859 | journal_release_error(NULL, s); |
1860 | } |
1861 | |
1862 | reiserfs_free_bitmap_cache(s); |
1863 | if (SB_BUFFER_WITH_SB(s)) |
1864 | brelse(SB_BUFFER_WITH_SB(s)); |
1865 | #ifdef CONFIG_QUOTA |
1866 | { |
1867 | int j; |
1868 | for (j = 0; j < MAXQUOTAS; j++) |
1869 | kfree(qf_names[j]); |
1870 | } |
1871 | #endif |
1872 | kfree(sbi); |
1873 | |
1874 | s->s_fs_info = NULL; |
1875 | return errval; |
1876 | } |
1877 | |
1878 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1879 | { |
1880 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
1881 | |
1882 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); |
1883 | buf->f_bfree = sb_free_blocks(rs); |
1884 | buf->f_bavail = buf->f_bfree; |
1885 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; |
1886 | buf->f_bsize = dentry->d_sb->s_blocksize; |
1887 | /* changed to accommodate gcc folks. */ |
1888 | buf->f_type = REISERFS_SUPER_MAGIC; |
1889 | buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); |
1890 | buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, |
1891 | sizeof(rs->s_uuid)/2); |
1892 | |
1893 | return 0; |
1894 | } |
1895 | |
1896 | #ifdef CONFIG_QUOTA |
1897 | static int reiserfs_write_dquot(struct dquot *dquot) |
1898 | { |
1899 | struct reiserfs_transaction_handle th; |
1900 | int ret, err; |
1901 | |
1902 | reiserfs_write_lock(dquot->dq_sb); |
1903 | ret = |
1904 | journal_begin(&th, dquot->dq_sb, |
1905 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
1906 | if (ret) |
1907 | goto out; |
1908 | ret = dquot_commit(dquot); |
1909 | err = |
1910 | journal_end(&th, dquot->dq_sb, |
1911 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
1912 | if (!ret && err) |
1913 | ret = err; |
1914 | out: |
1915 | reiserfs_write_unlock(dquot->dq_sb); |
1916 | return ret; |
1917 | } |
1918 | |
1919 | static int reiserfs_acquire_dquot(struct dquot *dquot) |
1920 | { |
1921 | struct reiserfs_transaction_handle th; |
1922 | int ret, err; |
1923 | |
1924 | reiserfs_write_lock(dquot->dq_sb); |
1925 | ret = |
1926 | journal_begin(&th, dquot->dq_sb, |
1927 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
1928 | if (ret) |
1929 | goto out; |
1930 | ret = dquot_acquire(dquot); |
1931 | err = |
1932 | journal_end(&th, dquot->dq_sb, |
1933 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
1934 | if (!ret && err) |
1935 | ret = err; |
1936 | out: |
1937 | reiserfs_write_unlock(dquot->dq_sb); |
1938 | return ret; |
1939 | } |
1940 | |
1941 | static int reiserfs_release_dquot(struct dquot *dquot) |
1942 | { |
1943 | struct reiserfs_transaction_handle th; |
1944 | int ret, err; |
1945 | |
1946 | reiserfs_write_lock(dquot->dq_sb); |
1947 | ret = |
1948 | journal_begin(&th, dquot->dq_sb, |
1949 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
1950 | if (ret) { |
1951 | /* Release dquot anyway to avoid endless cycle in dqput() */ |
1952 | dquot_release(dquot); |
1953 | goto out; |
1954 | } |
1955 | ret = dquot_release(dquot); |
1956 | err = |
1957 | journal_end(&th, dquot->dq_sb, |
1958 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
1959 | if (!ret && err) |
1960 | ret = err; |
1961 | out: |
1962 | reiserfs_write_unlock(dquot->dq_sb); |
1963 | return ret; |
1964 | } |
1965 | |
1966 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) |
1967 | { |
1968 | /* Are we journaling quotas? */ |
1969 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
1970 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { |
1971 | dquot_mark_dquot_dirty(dquot); |
1972 | return reiserfs_write_dquot(dquot); |
1973 | } else |
1974 | return dquot_mark_dquot_dirty(dquot); |
1975 | } |
1976 | |
1977 | static int reiserfs_write_info(struct super_block *sb, int type) |
1978 | { |
1979 | struct reiserfs_transaction_handle th; |
1980 | int ret, err; |
1981 | |
1982 | /* Data block + inode block */ |
1983 | reiserfs_write_lock(sb); |
1984 | ret = journal_begin(&th, sb, 2); |
1985 | if (ret) |
1986 | goto out; |
1987 | ret = dquot_commit_info(sb, type); |
1988 | err = journal_end(&th, sb, 2); |
1989 | if (!ret && err) |
1990 | ret = err; |
1991 | out: |
1992 | reiserfs_write_unlock(sb); |
1993 | return ret; |
1994 | } |
1995 | |
1996 | /* |
1997 | * Turn on quotas during mount time - we need to find the quota file and such... |
1998 | */ |
1999 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) |
2000 | { |
2001 | return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
2002 | REISERFS_SB(sb)->s_jquota_fmt, type); |
2003 | } |
2004 | |
2005 | /* |
2006 | * Standard function to be called on quota_on |
2007 | */ |
2008 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
2009 | char *name, int remount) |
2010 | { |
2011 | int err; |
2012 | struct path path; |
2013 | struct inode *inode; |
2014 | struct reiserfs_transaction_handle th; |
2015 | |
2016 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA))) |
2017 | return -EINVAL; |
2018 | /* No more checks needed? Path and format_id are bogus anyway... */ |
2019 | if (remount) |
2020 | return vfs_quota_on(sb, type, format_id, name, 1); |
2021 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
2022 | if (err) |
2023 | return err; |
2024 | /* Quotafile not on the same filesystem? */ |
2025 | if (path.mnt->mnt_sb != sb) { |
2026 | err = -EXDEV; |
2027 | goto out; |
2028 | } |
2029 | inode = path.dentry->d_inode; |
2030 | /* We must not pack tails for quota files on reiserfs for quota IO to work */ |
2031 | if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
2032 | err = reiserfs_unpack(inode, NULL); |
2033 | if (err) { |
2034 | reiserfs_warning(sb, "super-6520", |
2035 | "Unpacking tail of quota file failed" |
2036 | " (%d). Cannot turn on quotas.", err); |
2037 | err = -EINVAL; |
2038 | goto out; |
2039 | } |
2040 | mark_inode_dirty(inode); |
2041 | } |
2042 | /* Journaling quota? */ |
2043 | if (REISERFS_SB(sb)->s_qf_names[type]) { |
2044 | /* Quotafile not of fs root? */ |
2045 | if (path.dentry->d_parent != sb->s_root) |
2046 | reiserfs_warning(sb, "super-6521", |
2047 | "Quota file not on filesystem root. " |
2048 | "Journalled quota will not work."); |
2049 | } |
2050 | |
2051 | /* |
2052 | * When we journal data on quota file, we have to flush journal to see |
2053 | * all updates to the file when we bypass pagecache... |
2054 | */ |
2055 | if (reiserfs_file_data_log(inode)) { |
2056 | /* Just start temporary transaction and finish it */ |
2057 | err = journal_begin(&th, sb, 1); |
2058 | if (err) |
2059 | goto out; |
2060 | err = journal_end_sync(&th, sb, 1); |
2061 | if (err) |
2062 | goto out; |
2063 | } |
2064 | err = vfs_quota_on_path(sb, type, format_id, &path); |
2065 | out: |
2066 | path_put(&path); |
2067 | return err; |
2068 | } |
2069 | |
2070 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
2071 | * acquiring the locks... As quota files are never truncated and quota code |
2072 | * itself serializes the operations (and noone else should touch the files) |
2073 | * we don't have to be afraid of races */ |
2074 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, |
2075 | size_t len, loff_t off) |
2076 | { |
2077 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2078 | unsigned long blk = off >> sb->s_blocksize_bits; |
2079 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; |
2080 | size_t toread; |
2081 | struct buffer_head tmp_bh, *bh; |
2082 | loff_t i_size = i_size_read(inode); |
2083 | |
2084 | if (off > i_size) |
2085 | return 0; |
2086 | if (off + len > i_size) |
2087 | len = i_size - off; |
2088 | toread = len; |
2089 | while (toread > 0) { |
2090 | tocopy = |
2091 | sb->s_blocksize - offset < |
2092 | toread ? sb->s_blocksize - offset : toread; |
2093 | tmp_bh.b_state = 0; |
2094 | /* Quota files are without tails so we can safely use this function */ |
2095 | reiserfs_write_lock(sb); |
2096 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); |
2097 | reiserfs_write_unlock(sb); |
2098 | if (err) |
2099 | return err; |
2100 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ |
2101 | memset(data, 0, tocopy); |
2102 | else { |
2103 | bh = sb_bread(sb, tmp_bh.b_blocknr); |
2104 | if (!bh) |
2105 | return -EIO; |
2106 | memcpy(data, bh->b_data + offset, tocopy); |
2107 | brelse(bh); |
2108 | } |
2109 | offset = 0; |
2110 | toread -= tocopy; |
2111 | data += tocopy; |
2112 | blk++; |
2113 | } |
2114 | return len; |
2115 | } |
2116 | |
2117 | /* Write to quotafile (we know the transaction is already started and has |
2118 | * enough credits) */ |
2119 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, |
2120 | const char *data, size_t len, loff_t off) |
2121 | { |
2122 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2123 | unsigned long blk = off >> sb->s_blocksize_bits; |
2124 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; |
2125 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; |
2126 | size_t towrite = len; |
2127 | struct buffer_head tmp_bh, *bh; |
2128 | |
2129 | if (!current->journal_info) { |
2130 | printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)" |
2131 | " cancelled because transaction is not started.\n", |
2132 | (unsigned long long)off, (unsigned long long)len); |
2133 | return -EIO; |
2134 | } |
2135 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
2136 | while (towrite > 0) { |
2137 | tocopy = sb->s_blocksize - offset < towrite ? |
2138 | sb->s_blocksize - offset : towrite; |
2139 | tmp_bh.b_state = 0; |
2140 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); |
2141 | if (err) |
2142 | goto out; |
2143 | if (offset || tocopy != sb->s_blocksize) |
2144 | bh = sb_bread(sb, tmp_bh.b_blocknr); |
2145 | else |
2146 | bh = sb_getblk(sb, tmp_bh.b_blocknr); |
2147 | if (!bh) { |
2148 | err = -EIO; |
2149 | goto out; |
2150 | } |
2151 | lock_buffer(bh); |
2152 | memcpy(bh->b_data + offset, data, tocopy); |
2153 | flush_dcache_page(bh->b_page); |
2154 | set_buffer_uptodate(bh); |
2155 | unlock_buffer(bh); |
2156 | reiserfs_prepare_for_journal(sb, bh, 1); |
2157 | journal_mark_dirty(current->journal_info, sb, bh); |
2158 | if (!journal_quota) |
2159 | reiserfs_add_ordered_list(inode, bh); |
2160 | brelse(bh); |
2161 | offset = 0; |
2162 | towrite -= tocopy; |
2163 | data += tocopy; |
2164 | blk++; |
2165 | } |
2166 | out: |
2167 | if (len == towrite) { |
2168 | mutex_unlock(&inode->i_mutex); |
2169 | return err; |
2170 | } |
2171 | if (inode->i_size < off + len - towrite) |
2172 | i_size_write(inode, off + len - towrite); |
2173 | inode->i_version++; |
2174 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
2175 | mark_inode_dirty(inode); |
2176 | mutex_unlock(&inode->i_mutex); |
2177 | return len - towrite; |
2178 | } |
2179 | |
2180 | #endif |
2181 | |
2182 | static int get_super_block(struct file_system_type *fs_type, |
2183 | int flags, const char *dev_name, |
2184 | void *data, struct vfsmount *mnt) |
2185 | { |
2186 | return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super, |
2187 | mnt); |
2188 | } |
2189 | |
2190 | static int __init init_reiserfs_fs(void) |
2191 | { |
2192 | int ret; |
2193 | |
2194 | if ((ret = init_inodecache())) { |
2195 | return ret; |
2196 | } |
2197 | |
2198 | reiserfs_proc_info_global_init(); |
2199 | reiserfs_proc_register_global("version", |
2200 | reiserfs_global_version_in_proc); |
2201 | |
2202 | ret = register_filesystem(&reiserfs_fs_type); |
2203 | |
2204 | if (ret == 0) { |
2205 | return 0; |
2206 | } |
2207 | |
2208 | reiserfs_proc_unregister_global("version"); |
2209 | reiserfs_proc_info_global_done(); |
2210 | destroy_inodecache(); |
2211 | |
2212 | return ret; |
2213 | } |
2214 | |
2215 | static void __exit exit_reiserfs_fs(void) |
2216 | { |
2217 | reiserfs_proc_unregister_global("version"); |
2218 | reiserfs_proc_info_global_done(); |
2219 | unregister_filesystem(&reiserfs_fs_type); |
2220 | destroy_inodecache(); |
2221 | } |
2222 | |
2223 | struct file_system_type reiserfs_fs_type = { |
2224 | .owner = THIS_MODULE, |
2225 | .name = "reiserfs", |
2226 | .get_sb = get_super_block, |
2227 | .kill_sb = reiserfs_kill_sb, |
2228 | .fs_flags = FS_REQUIRES_DEV, |
2229 | }; |
2230 | |
2231 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
2232 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); |
2233 | MODULE_LICENSE("GPL"); |
2234 | |
2235 | module_init(init_reiserfs_fs); |
2236 | module_exit(exit_reiserfs_fs); |
2237 |
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