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/slab.h> |
16 | #include <linux/vmalloc.h> |
17 | #include <linux/time.h> |
18 | #include <linux/uaccess.h> |
19 | #include "reiserfs.h" |
20 | #include "acl.h" |
21 | #include "xattr.h" |
22 | #include <linux/init.h> |
23 | #include <linux/blkdev.h> |
24 | #include <linux/backing-dev.h> |
25 | #include <linux/buffer_head.h> |
26 | #include <linux/exportfs.h> |
27 | #include <linux/quotaops.h> |
28 | #include <linux/vfs.h> |
29 | #include <linux/mount.h> |
30 | #include <linux/namei.h> |
31 | #include <linux/crc32.h> |
32 | #include <linux/seq_file.h> |
33 | |
34 | struct file_system_type reiserfs_fs_type; |
35 | |
36 | static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; |
37 | static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; |
38 | static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; |
39 | |
40 | int is_reiserfs_3_5(struct reiserfs_super_block *rs) |
41 | { |
42 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, |
43 | strlen(reiserfs_3_5_magic_string)); |
44 | } |
45 | |
46 | int is_reiserfs_3_6(struct reiserfs_super_block *rs) |
47 | { |
48 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, |
49 | strlen(reiserfs_3_6_magic_string)); |
50 | } |
51 | |
52 | int is_reiserfs_jr(struct reiserfs_super_block *rs) |
53 | { |
54 | return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, |
55 | strlen(reiserfs_jr_magic_string)); |
56 | } |
57 | |
58 | static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) |
59 | { |
60 | return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || |
61 | is_reiserfs_jr(rs)); |
62 | } |
63 | |
64 | static int reiserfs_remount(struct super_block *s, int *flags, char *data); |
65 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); |
66 | |
67 | static int reiserfs_sync_fs(struct super_block *s, int wait) |
68 | { |
69 | struct reiserfs_transaction_handle th; |
70 | |
71 | /* |
72 | * Writeback quota in non-journalled quota case - journalled quota has |
73 | * no dirty dquots |
74 | */ |
75 | dquot_writeback_dquots(sb: s, type: -1); |
76 | reiserfs_write_lock(s); |
77 | if (!journal_begin(&th, sb: s, 1)) |
78 | if (!journal_end_sync(&th)) |
79 | reiserfs_flush_old_commits(s); |
80 | reiserfs_write_unlock(s); |
81 | return 0; |
82 | } |
83 | |
84 | static void flush_old_commits(struct work_struct *work) |
85 | { |
86 | struct reiserfs_sb_info *sbi; |
87 | struct super_block *s; |
88 | |
89 | sbi = container_of(work, struct reiserfs_sb_info, old_work.work); |
90 | s = sbi->s_journal->j_work_sb; |
91 | |
92 | /* |
93 | * We need s_umount for protecting quota writeback. We have to use |
94 | * trylock as reiserfs_cancel_old_flush() may be waiting for this work |
95 | * to complete with s_umount held. |
96 | */ |
97 | if (!down_read_trylock(sem: &s->s_umount)) { |
98 | /* Requeue work if we are not cancelling it */ |
99 | spin_lock(lock: &sbi->old_work_lock); |
100 | if (sbi->work_queued == 1) |
101 | queue_delayed_work(wq: system_long_wq, dwork: &sbi->old_work, HZ); |
102 | spin_unlock(lock: &sbi->old_work_lock); |
103 | return; |
104 | } |
105 | spin_lock(lock: &sbi->old_work_lock); |
106 | /* Avoid clobbering the cancel state... */ |
107 | if (sbi->work_queued == 1) |
108 | sbi->work_queued = 0; |
109 | spin_unlock(lock: &sbi->old_work_lock); |
110 | |
111 | reiserfs_sync_fs(s, wait: 1); |
112 | up_read(sem: &s->s_umount); |
113 | } |
114 | |
115 | void reiserfs_schedule_old_flush(struct super_block *s) |
116 | { |
117 | struct reiserfs_sb_info *sbi = REISERFS_SB(sb: s); |
118 | unsigned long delay; |
119 | |
120 | /* |
121 | * Avoid scheduling flush when sb is being shut down. It can race |
122 | * with journal shutdown and free still queued delayed work. |
123 | */ |
124 | if (sb_rdonly(sb: s) || !(s->s_flags & SB_ACTIVE)) |
125 | return; |
126 | |
127 | spin_lock(lock: &sbi->old_work_lock); |
128 | if (!sbi->work_queued) { |
129 | delay = msecs_to_jiffies(m: dirty_writeback_interval * 10); |
130 | queue_delayed_work(wq: system_long_wq, dwork: &sbi->old_work, delay); |
131 | sbi->work_queued = 1; |
132 | } |
133 | spin_unlock(lock: &sbi->old_work_lock); |
134 | } |
135 | |
136 | void reiserfs_cancel_old_flush(struct super_block *s) |
137 | { |
138 | struct reiserfs_sb_info *sbi = REISERFS_SB(sb: s); |
139 | |
140 | spin_lock(lock: &sbi->old_work_lock); |
141 | /* Make sure no new flushes will be queued */ |
142 | sbi->work_queued = 2; |
143 | spin_unlock(lock: &sbi->old_work_lock); |
144 | cancel_delayed_work_sync(dwork: &REISERFS_SB(sb: s)->old_work); |
145 | } |
146 | |
147 | static int reiserfs_freeze(struct super_block *s) |
148 | { |
149 | struct reiserfs_transaction_handle th; |
150 | |
151 | reiserfs_cancel_old_flush(s); |
152 | |
153 | reiserfs_write_lock(s); |
154 | if (!sb_rdonly(sb: s)) { |
155 | int err = journal_begin(&th, sb: s, 1); |
156 | if (err) { |
157 | reiserfs_block_writes(th: &th); |
158 | } else { |
159 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), |
160 | wait: 1); |
161 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
162 | reiserfs_block_writes(th: &th); |
163 | journal_end_sync(&th); |
164 | } |
165 | } |
166 | reiserfs_write_unlock(s); |
167 | return 0; |
168 | } |
169 | |
170 | static int reiserfs_unfreeze(struct super_block *s) |
171 | { |
172 | struct reiserfs_sb_info *sbi = REISERFS_SB(sb: s); |
173 | |
174 | reiserfs_allow_writes(s); |
175 | spin_lock(lock: &sbi->old_work_lock); |
176 | /* Allow old_work to run again */ |
177 | sbi->work_queued = 0; |
178 | spin_unlock(lock: &sbi->old_work_lock); |
179 | return 0; |
180 | } |
181 | |
182 | extern const struct in_core_key MAX_IN_CORE_KEY; |
183 | |
184 | /* |
185 | * this is used to delete "save link" when there are no items of a |
186 | * file it points to. It can either happen if unlink is completed but |
187 | * "save unlink" removal, or if file has both unlink and truncate |
188 | * pending and as unlink completes first (because key of "save link" |
189 | * protecting unlink is bigger that a key lf "save link" which |
190 | * protects truncate), so there left no items to make truncate |
191 | * completion on |
192 | */ |
193 | static int remove_save_link_only(struct super_block *s, |
194 | struct reiserfs_key *key, int oid_free) |
195 | { |
196 | struct reiserfs_transaction_handle th; |
197 | int err; |
198 | |
199 | /* we are going to do one balancing */ |
200 | err = journal_begin(&th, sb: s, JOURNAL_PER_BALANCE_CNT); |
201 | if (err) |
202 | return err; |
203 | |
204 | reiserfs_delete_solid_item(th: &th, NULL, key); |
205 | if (oid_free) |
206 | /* removals are protected by direct items */ |
207 | reiserfs_release_objectid(th: &th, le32_to_cpu(key->k_objectid)); |
208 | |
209 | return journal_end(&th); |
210 | } |
211 | |
212 | #ifdef CONFIG_QUOTA |
213 | static int reiserfs_quota_on_mount(struct super_block *, int); |
214 | #endif |
215 | |
216 | /* |
217 | * Look for uncompleted unlinks and truncates and complete them |
218 | * |
219 | * Called with superblock write locked. If quotas are enabled, we have to |
220 | * release/retake lest we call dquot_quota_on_mount(), proceed to |
221 | * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per |
222 | * cpu worklets to complete flush_async_commits() that in turn wait for the |
223 | * superblock write lock. |
224 | */ |
225 | static int finish_unfinished(struct super_block *s) |
226 | { |
227 | INITIALIZE_PATH(path); |
228 | struct cpu_key max_cpu_key, obj_key; |
229 | struct reiserfs_key save_link_key, last_inode_key; |
230 | int retval = 0; |
231 | struct item_head *ih; |
232 | struct buffer_head *bh; |
233 | int item_pos; |
234 | char *item; |
235 | int done; |
236 | struct inode *inode; |
237 | int truncate; |
238 | #ifdef CONFIG_QUOTA |
239 | int i; |
240 | int ms_active_set; |
241 | int quota_enabled[REISERFS_MAXQUOTAS]; |
242 | #endif |
243 | |
244 | /* compose key to look for "save" links */ |
245 | max_cpu_key.version = KEY_FORMAT_3_5; |
246 | max_cpu_key.on_disk_key.k_dir_id = ~0U; |
247 | max_cpu_key.on_disk_key.k_objectid = ~0U; |
248 | set_cpu_key_k_offset(key: &max_cpu_key, offset: ~0U); |
249 | max_cpu_key.key_length = 3; |
250 | |
251 | memset(&last_inode_key, 0, sizeof(last_inode_key)); |
252 | |
253 | #ifdef CONFIG_QUOTA |
254 | /* Needed for iput() to work correctly and not trash data */ |
255 | if (s->s_flags & SB_ACTIVE) { |
256 | ms_active_set = 0; |
257 | } else { |
258 | ms_active_set = 1; |
259 | s->s_flags |= SB_ACTIVE; |
260 | } |
261 | /* Turn on quotas so that they are updated correctly */ |
262 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
263 | quota_enabled[i] = 1; |
264 | if (REISERFS_SB(sb: s)->s_qf_names[i]) { |
265 | int ret; |
266 | |
267 | if (sb_has_quota_active(sb: s, type: i)) { |
268 | quota_enabled[i] = 0; |
269 | continue; |
270 | } |
271 | reiserfs_write_unlock(s); |
272 | ret = reiserfs_quota_on_mount(s, i); |
273 | reiserfs_write_lock(s); |
274 | if (ret < 0) |
275 | reiserfs_warning(s, "reiserfs-2500" , |
276 | "cannot turn on journaled " |
277 | "quota: error %d" , ret); |
278 | } |
279 | } |
280 | #endif |
281 | |
282 | done = 0; |
283 | REISERFS_SB(sb: s)->s_is_unlinked_ok = 1; |
284 | while (!retval) { |
285 | int depth; |
286 | retval = search_item(s, &max_cpu_key, &path); |
287 | if (retval != ITEM_NOT_FOUND) { |
288 | reiserfs_error(s, "vs-2140" , |
289 | "search_by_key returned %d" , retval); |
290 | break; |
291 | } |
292 | |
293 | bh = get_last_bh(&path); |
294 | item_pos = get_item_pos(&path); |
295 | if (item_pos != B_NR_ITEMS(bh)) { |
296 | reiserfs_warning(s, "vs-2060" , |
297 | "wrong position found" ); |
298 | break; |
299 | } |
300 | item_pos--; |
301 | ih = item_head(bh, item_num: item_pos); |
302 | |
303 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) |
304 | /* there are no "save" links anymore */ |
305 | break; |
306 | |
307 | save_link_key = ih->ih_key; |
308 | if (is_indirect_le_ih(ih)) |
309 | truncate = 1; |
310 | else |
311 | truncate = 0; |
312 | |
313 | /* reiserfs_iget needs k_dirid and k_objectid only */ |
314 | item = ih_item_body(bh, ih); |
315 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); |
316 | obj_key.on_disk_key.k_objectid = |
317 | le32_to_cpu(ih->ih_key.k_objectid); |
318 | obj_key.on_disk_key.k_offset = 0; |
319 | obj_key.on_disk_key.k_type = 0; |
320 | |
321 | pathrelse(search_path: &path); |
322 | |
323 | inode = reiserfs_iget(s, key: &obj_key); |
324 | if (IS_ERR_OR_NULL(ptr: inode)) { |
325 | /* |
326 | * the unlink almost completed, it just did not |
327 | * manage to remove "save" link and release objectid |
328 | */ |
329 | reiserfs_warning(s, "vs-2180" , "iget failed for %K" , |
330 | &obj_key); |
331 | retval = remove_save_link_only(s, key: &save_link_key, oid_free: 1); |
332 | continue; |
333 | } |
334 | |
335 | if (!truncate && inode->i_nlink) { |
336 | /* file is not unlinked */ |
337 | reiserfs_warning(s, "vs-2185" , |
338 | "file %K is not unlinked" , |
339 | &obj_key); |
340 | retval = remove_save_link_only(s, key: &save_link_key, oid_free: 0); |
341 | continue; |
342 | } |
343 | depth = reiserfs_write_unlock_nested(s: inode->i_sb); |
344 | dquot_initialize(inode); |
345 | reiserfs_write_lock_nested(s: inode->i_sb, depth); |
346 | |
347 | if (truncate && S_ISDIR(inode->i_mode)) { |
348 | /* |
349 | * We got a truncate request for a dir which |
350 | * is impossible. The only imaginable way is to |
351 | * execute unfinished truncate request then boot |
352 | * into old kernel, remove the file and create dir |
353 | * with the same key. |
354 | */ |
355 | reiserfs_warning(s, "green-2101" , |
356 | "impossible truncate on a " |
357 | "directory %k. Please report" , |
358 | INODE_PKEY(inode)); |
359 | retval = remove_save_link_only(s, key: &save_link_key, oid_free: 0); |
360 | truncate = 0; |
361 | iput(inode); |
362 | continue; |
363 | } |
364 | |
365 | if (truncate) { |
366 | REISERFS_I(inode)->i_flags |= |
367 | i_link_saved_truncate_mask; |
368 | /* |
369 | * not completed truncate found. New size was |
370 | * committed together with "save" link |
371 | */ |
372 | reiserfs_info(s, fmt: "Truncating %k to %lld .." , |
373 | INODE_PKEY(inode), inode->i_size); |
374 | |
375 | /* don't update modification time */ |
376 | reiserfs_truncate_file(inode, update_timestamps: 0); |
377 | |
378 | retval = remove_save_link(inode, truncate); |
379 | } else { |
380 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; |
381 | /* not completed unlink (rmdir) found */ |
382 | reiserfs_info(s, fmt: "Removing %k.." , INODE_PKEY(inode)); |
383 | if (memcmp(p: &last_inode_key, INODE_PKEY(inode), |
384 | size: sizeof(last_inode_key))){ |
385 | last_inode_key = *INODE_PKEY(inode); |
386 | /* removal gets completed in iput */ |
387 | retval = 0; |
388 | } else { |
389 | reiserfs_warning(s, "super-2189" , "Dead loop " |
390 | "in finish_unfinished " |
391 | "detected, just remove " |
392 | "save link\n" ); |
393 | retval = remove_save_link_only(s, |
394 | key: &save_link_key, oid_free: 0); |
395 | } |
396 | } |
397 | |
398 | iput(inode); |
399 | printk("done\n" ); |
400 | done++; |
401 | } |
402 | REISERFS_SB(sb: s)->s_is_unlinked_ok = 0; |
403 | |
404 | #ifdef CONFIG_QUOTA |
405 | /* Turn quotas off */ |
406 | reiserfs_write_unlock(s); |
407 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
408 | if (sb_dqopt(sb: s)->files[i] && quota_enabled[i]) |
409 | dquot_quota_off(sb: s, type: i); |
410 | } |
411 | reiserfs_write_lock(s); |
412 | if (ms_active_set) |
413 | /* Restore the flag back */ |
414 | s->s_flags &= ~SB_ACTIVE; |
415 | #endif |
416 | pathrelse(search_path: &path); |
417 | if (done) |
418 | reiserfs_info(s, fmt: "There were %d uncompleted unlinks/truncates. " |
419 | "Completed\n" , done); |
420 | return retval; |
421 | } |
422 | |
423 | /* |
424 | * to protect file being unlinked from getting lost we "safe" link files |
425 | * being unlinked. This link will be deleted in the same transaction with last |
426 | * item of file. mounting the filesystem we scan all these links and remove |
427 | * files which almost got lost |
428 | */ |
429 | void add_save_link(struct reiserfs_transaction_handle *th, |
430 | struct inode *inode, int truncate) |
431 | { |
432 | INITIALIZE_PATH(path); |
433 | int retval; |
434 | struct cpu_key key; |
435 | struct item_head ih; |
436 | __le32 link; |
437 | |
438 | BUG_ON(!th->t_trans_id); |
439 | |
440 | /* file can only get one "save link" of each kind */ |
441 | RFALSE(truncate && |
442 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), |
443 | "saved link already exists for truncated inode %lx" , |
444 | (long)inode->i_ino); |
445 | RFALSE(!truncate && |
446 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), |
447 | "saved link already exists for unlinked inode %lx" , |
448 | (long)inode->i_ino); |
449 | |
450 | /* setup key of "save" link */ |
451 | key.version = KEY_FORMAT_3_5; |
452 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; |
453 | key.on_disk_key.k_objectid = inode->i_ino; |
454 | if (!truncate) { |
455 | /* unlink, rmdir, rename */ |
456 | set_cpu_key_k_offset(key: &key, offset: 1 + inode->i_sb->s_blocksize); |
457 | set_cpu_key_k_type(key: &key, TYPE_DIRECT); |
458 | |
459 | /* item head of "safe" link */ |
460 | make_le_item_head(ih: &ih, key: &key, version: key.version, |
461 | offset: 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, |
462 | length: 4 /*length */ , entry_count: 0xffff /*free space */ ); |
463 | } else { |
464 | /* truncate */ |
465 | if (S_ISDIR(inode->i_mode)) |
466 | reiserfs_warning(inode->i_sb, "green-2102" , |
467 | "Adding a truncate savelink for " |
468 | "a directory %k! Please report" , |
469 | INODE_PKEY(inode)); |
470 | set_cpu_key_k_offset(key: &key, offset: 1); |
471 | set_cpu_key_k_type(key: &key, TYPE_INDIRECT); |
472 | |
473 | /* item head of "safe" link */ |
474 | make_le_item_head(ih: &ih, key: &key, version: key.version, offset: 1, TYPE_INDIRECT, |
475 | length: 4 /*length */ , entry_count: 0 /*free space */ ); |
476 | } |
477 | key.key_length = 3; |
478 | |
479 | /* look for its place in the tree */ |
480 | retval = search_item(inode->i_sb, &key, &path); |
481 | if (retval != ITEM_NOT_FOUND) { |
482 | if (retval != -ENOSPC) |
483 | reiserfs_error(inode->i_sb, "vs-2100" , |
484 | "search_by_key (%K) returned %d" , &key, |
485 | retval); |
486 | pathrelse(search_path: &path); |
487 | return; |
488 | } |
489 | |
490 | /* body of "save" link */ |
491 | link = INODE_PKEY(inode)->k_dir_id; |
492 | |
493 | /* put "save" link into tree, don't charge quota to anyone */ |
494 | retval = |
495 | reiserfs_insert_item(th, path: &path, key: &key, ih: &ih, NULL, body: (char *)&link); |
496 | if (retval) { |
497 | if (retval != -ENOSPC) |
498 | reiserfs_error(inode->i_sb, "vs-2120" , |
499 | "insert_item returned %d" , retval); |
500 | } else { |
501 | if (truncate) |
502 | REISERFS_I(inode)->i_flags |= |
503 | i_link_saved_truncate_mask; |
504 | else |
505 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; |
506 | } |
507 | } |
508 | |
509 | /* this opens transaction unlike add_save_link */ |
510 | int remove_save_link(struct inode *inode, int truncate) |
511 | { |
512 | struct reiserfs_transaction_handle th; |
513 | struct reiserfs_key key; |
514 | int err; |
515 | |
516 | /* we are going to do one balancing only */ |
517 | err = journal_begin(&th, sb: inode->i_sb, JOURNAL_PER_BALANCE_CNT); |
518 | if (err) |
519 | return err; |
520 | |
521 | /* setup key of "save" link */ |
522 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); |
523 | key.k_objectid = INODE_PKEY(inode)->k_objectid; |
524 | if (!truncate) { |
525 | /* unlink, rmdir, rename */ |
526 | set_le_key_k_offset(KEY_FORMAT_3_5, key: &key, |
527 | offset: 1 + inode->i_sb->s_blocksize); |
528 | set_le_key_k_type(KEY_FORMAT_3_5, key: &key, TYPE_DIRECT); |
529 | } else { |
530 | /* truncate */ |
531 | set_le_key_k_offset(KEY_FORMAT_3_5, key: &key, offset: 1); |
532 | set_le_key_k_type(KEY_FORMAT_3_5, key: &key, TYPE_INDIRECT); |
533 | } |
534 | |
535 | if ((truncate && |
536 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || |
537 | (!truncate && |
538 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) |
539 | /* don't take quota bytes from anywhere */ |
540 | reiserfs_delete_solid_item(th: &th, NULL, key: &key); |
541 | if (!truncate) { |
542 | reiserfs_release_objectid(th: &th, objectid_to_release: inode->i_ino); |
543 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; |
544 | } else |
545 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; |
546 | |
547 | return journal_end(&th); |
548 | } |
549 | |
550 | static void reiserfs_kill_sb(struct super_block *s) |
551 | { |
552 | if (REISERFS_SB(sb: s)) { |
553 | reiserfs_proc_info_done(sb: s); |
554 | /* |
555 | * Force any pending inode evictions to occur now. Any |
556 | * inodes to be removed that have extended attributes |
557 | * associated with them need to clean them up before |
558 | * we can release the extended attribute root dentries. |
559 | * shrink_dcache_for_umount will BUG if we don't release |
560 | * those before it's called so ->put_super is too late. |
561 | */ |
562 | shrink_dcache_sb(s); |
563 | |
564 | dput(REISERFS_SB(sb: s)->xattr_root); |
565 | REISERFS_SB(sb: s)->xattr_root = NULL; |
566 | dput(REISERFS_SB(sb: s)->priv_root); |
567 | REISERFS_SB(sb: s)->priv_root = NULL; |
568 | } |
569 | |
570 | kill_block_super(sb: s); |
571 | } |
572 | |
573 | #ifdef CONFIG_QUOTA |
574 | static int reiserfs_quota_off(struct super_block *sb, int type); |
575 | |
576 | static void reiserfs_quota_off_umount(struct super_block *s) |
577 | { |
578 | int type; |
579 | |
580 | for (type = 0; type < REISERFS_MAXQUOTAS; type++) |
581 | reiserfs_quota_off(sb: s, type); |
582 | } |
583 | #else |
584 | static inline void reiserfs_quota_off_umount(struct super_block *s) |
585 | { |
586 | } |
587 | #endif |
588 | |
589 | static void reiserfs_put_super(struct super_block *s) |
590 | { |
591 | struct reiserfs_transaction_handle th; |
592 | th.t_trans_id = 0; |
593 | |
594 | reiserfs_quota_off_umount(s); |
595 | |
596 | reiserfs_write_lock(s); |
597 | |
598 | /* |
599 | * change file system state to current state if it was mounted |
600 | * with read-write permissions |
601 | */ |
602 | if (!sb_rdonly(sb: s)) { |
603 | if (!journal_begin(&th, sb: s, 10)) { |
604 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), |
605 | wait: 1); |
606 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), |
607 | REISERFS_SB(s)->s_mount_state); |
608 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
609 | } |
610 | } |
611 | |
612 | /* |
613 | * note, journal_release checks for readonly mount, and can |
614 | * decide not to do a journal_end |
615 | */ |
616 | journal_release(&th, s); |
617 | |
618 | reiserfs_free_bitmap_cache(sb: s); |
619 | |
620 | brelse(SB_BUFFER_WITH_SB(s)); |
621 | |
622 | print_statistics(s); |
623 | |
624 | if (REISERFS_SB(sb: s)->reserved_blocks != 0) { |
625 | reiserfs_warning(s, "green-2005" , "reserved blocks left %d" , |
626 | REISERFS_SB(s)->reserved_blocks); |
627 | } |
628 | |
629 | reiserfs_write_unlock(s); |
630 | mutex_destroy(lock: &REISERFS_SB(sb: s)->lock); |
631 | destroy_workqueue(wq: REISERFS_SB(sb: s)->commit_wq); |
632 | kfree(objp: REISERFS_SB(sb: s)->s_jdev); |
633 | kfree(objp: s->s_fs_info); |
634 | s->s_fs_info = NULL; |
635 | } |
636 | |
637 | static struct kmem_cache *reiserfs_inode_cachep; |
638 | |
639 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) |
640 | { |
641 | struct reiserfs_inode_info *ei; |
642 | ei = alloc_inode_sb(sb, cache: reiserfs_inode_cachep, GFP_KERNEL); |
643 | if (!ei) |
644 | return NULL; |
645 | atomic_set(v: &ei->openers, i: 0); |
646 | mutex_init(&ei->tailpack); |
647 | #ifdef CONFIG_QUOTA |
648 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
649 | #endif |
650 | |
651 | return &ei->vfs_inode; |
652 | } |
653 | |
654 | static void reiserfs_free_inode(struct inode *inode) |
655 | { |
656 | kmem_cache_free(s: reiserfs_inode_cachep, objp: REISERFS_I(inode)); |
657 | } |
658 | |
659 | static void init_once(void *foo) |
660 | { |
661 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
662 | |
663 | INIT_LIST_HEAD(list: &ei->i_prealloc_list); |
664 | inode_init_once(&ei->vfs_inode); |
665 | } |
666 | |
667 | static int __init init_inodecache(void) |
668 | { |
669 | reiserfs_inode_cachep = kmem_cache_create(name: "reiser_inode_cache" , |
670 | size: sizeof(struct |
671 | reiserfs_inode_info), |
672 | align: 0, flags: (SLAB_RECLAIM_ACCOUNT| |
673 | SLAB_MEM_SPREAD| |
674 | SLAB_ACCOUNT), |
675 | ctor: init_once); |
676 | if (reiserfs_inode_cachep == NULL) |
677 | return -ENOMEM; |
678 | return 0; |
679 | } |
680 | |
681 | static void destroy_inodecache(void) |
682 | { |
683 | /* |
684 | * Make sure all delayed rcu free inodes are flushed before we |
685 | * destroy cache. |
686 | */ |
687 | rcu_barrier(); |
688 | kmem_cache_destroy(s: reiserfs_inode_cachep); |
689 | } |
690 | |
691 | /* we don't mark inodes dirty, we just log them */ |
692 | static void reiserfs_dirty_inode(struct inode *inode, int flags) |
693 | { |
694 | struct reiserfs_transaction_handle th; |
695 | |
696 | int err = 0; |
697 | |
698 | if (sb_rdonly(sb: inode->i_sb)) { |
699 | reiserfs_warning(inode->i_sb, "clm-6006" , |
700 | "writing inode %lu on readonly FS" , |
701 | inode->i_ino); |
702 | return; |
703 | } |
704 | reiserfs_write_lock(s: inode->i_sb); |
705 | |
706 | /* |
707 | * this is really only used for atime updates, so they don't have |
708 | * to be included in O_SYNC or fsync |
709 | */ |
710 | err = journal_begin(&th, sb: inode->i_sb, 1); |
711 | if (err) |
712 | goto out; |
713 | |
714 | reiserfs_update_sd(th: &th, inode); |
715 | journal_end(&th); |
716 | |
717 | out: |
718 | reiserfs_write_unlock(s: inode->i_sb); |
719 | } |
720 | |
721 | static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) |
722 | { |
723 | struct super_block *s = root->d_sb; |
724 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
725 | long opts = REISERFS_SB(sb: s)->s_mount_opt; |
726 | |
727 | if (opts & (1 << REISERFS_LARGETAIL)) |
728 | seq_puts(m: seq, s: ",tails=on" ); |
729 | else if (!(opts & (1 << REISERFS_SMALLTAIL))) |
730 | seq_puts(m: seq, s: ",notail" ); |
731 | /* tails=small is default so we don't show it */ |
732 | |
733 | if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) |
734 | seq_puts(m: seq, s: ",barrier=none" ); |
735 | /* barrier=flush is default so we don't show it */ |
736 | |
737 | if (opts & (1 << REISERFS_ERROR_CONTINUE)) |
738 | seq_puts(m: seq, s: ",errors=continue" ); |
739 | else if (opts & (1 << REISERFS_ERROR_PANIC)) |
740 | seq_puts(m: seq, s: ",errors=panic" ); |
741 | /* errors=ro is default so we don't show it */ |
742 | |
743 | if (opts & (1 << REISERFS_DATA_LOG)) |
744 | seq_puts(m: seq, s: ",data=journal" ); |
745 | else if (opts & (1 << REISERFS_DATA_WRITEBACK)) |
746 | seq_puts(m: seq, s: ",data=writeback" ); |
747 | /* data=ordered is default so we don't show it */ |
748 | |
749 | if (opts & (1 << REISERFS_ATTRS)) |
750 | seq_puts(m: seq, s: ",attrs" ); |
751 | |
752 | if (opts & (1 << REISERFS_XATTRS_USER)) |
753 | seq_puts(m: seq, s: ",user_xattr" ); |
754 | |
755 | if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) |
756 | seq_puts(m: seq, s: ",expose_privroot" ); |
757 | |
758 | if (opts & (1 << REISERFS_POSIXACL)) |
759 | seq_puts(m: seq, s: ",acl" ); |
760 | |
761 | if (REISERFS_SB(sb: s)->s_jdev) |
762 | seq_show_option(m: seq, name: "jdev" , value: REISERFS_SB(sb: s)->s_jdev); |
763 | |
764 | if (journal->j_max_commit_age != journal->j_default_max_commit_age) |
765 | seq_printf(m: seq, fmt: ",commit=%d" , journal->j_max_commit_age); |
766 | |
767 | #ifdef CONFIG_QUOTA |
768 | if (REISERFS_SB(sb: s)->s_qf_names[USRQUOTA]) |
769 | seq_show_option(m: seq, name: "usrjquota" , |
770 | value: REISERFS_SB(sb: s)->s_qf_names[USRQUOTA]); |
771 | else if (opts & (1 << REISERFS_USRQUOTA)) |
772 | seq_puts(m: seq, s: ",usrquota" ); |
773 | if (REISERFS_SB(sb: s)->s_qf_names[GRPQUOTA]) |
774 | seq_show_option(m: seq, name: "grpjquota" , |
775 | value: REISERFS_SB(sb: s)->s_qf_names[GRPQUOTA]); |
776 | else if (opts & (1 << REISERFS_GRPQUOTA)) |
777 | seq_puts(m: seq, s: ",grpquota" ); |
778 | if (REISERFS_SB(sb: s)->s_jquota_fmt) { |
779 | if (REISERFS_SB(sb: s)->s_jquota_fmt == QFMT_VFS_OLD) |
780 | seq_puts(m: seq, s: ",jqfmt=vfsold" ); |
781 | else if (REISERFS_SB(sb: s)->s_jquota_fmt == QFMT_VFS_V0) |
782 | seq_puts(m: seq, s: ",jqfmt=vfsv0" ); |
783 | } |
784 | #endif |
785 | |
786 | /* Block allocator options */ |
787 | if (opts & (1 << REISERFS_NO_BORDER)) |
788 | seq_puts(m: seq, s: ",block-allocator=noborder" ); |
789 | if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) |
790 | seq_puts(m: seq, s: ",block-allocator=no_unhashed_relocation" ); |
791 | if (opts & (1 << REISERFS_HASHED_RELOCATION)) |
792 | seq_puts(m: seq, s: ",block-allocator=hashed_relocation" ); |
793 | if (opts & (1 << REISERFS_TEST4)) |
794 | seq_puts(m: seq, s: ",block-allocator=test4" ); |
795 | show_alloc_options(seq, s); |
796 | return 0; |
797 | } |
798 | |
799 | #ifdef CONFIG_QUOTA |
800 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
801 | size_t, loff_t); |
802 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, |
803 | loff_t); |
804 | |
805 | static struct dquot **reiserfs_get_dquots(struct inode *inode) |
806 | { |
807 | return REISERFS_I(inode)->i_dquot; |
808 | } |
809 | #endif |
810 | |
811 | static const struct super_operations reiserfs_sops = { |
812 | .alloc_inode = reiserfs_alloc_inode, |
813 | .free_inode = reiserfs_free_inode, |
814 | .write_inode = reiserfs_write_inode, |
815 | .dirty_inode = reiserfs_dirty_inode, |
816 | .evict_inode = reiserfs_evict_inode, |
817 | .put_super = reiserfs_put_super, |
818 | .sync_fs = reiserfs_sync_fs, |
819 | .freeze_fs = reiserfs_freeze, |
820 | .unfreeze_fs = reiserfs_unfreeze, |
821 | .statfs = reiserfs_statfs, |
822 | .remount_fs = reiserfs_remount, |
823 | .show_options = reiserfs_show_options, |
824 | #ifdef CONFIG_QUOTA |
825 | .quota_read = reiserfs_quota_read, |
826 | .quota_write = reiserfs_quota_write, |
827 | .get_dquots = reiserfs_get_dquots, |
828 | #endif |
829 | }; |
830 | |
831 | #ifdef CONFIG_QUOTA |
832 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") |
833 | |
834 | static int reiserfs_write_dquot(struct dquot *); |
835 | static int reiserfs_acquire_dquot(struct dquot *); |
836 | static int reiserfs_release_dquot(struct dquot *); |
837 | static int reiserfs_mark_dquot_dirty(struct dquot *); |
838 | static int reiserfs_write_info(struct super_block *, int); |
839 | static int reiserfs_quota_on(struct super_block *, int, int, const struct path *); |
840 | |
841 | static const struct dquot_operations reiserfs_quota_operations = { |
842 | .write_dquot = reiserfs_write_dquot, |
843 | .acquire_dquot = reiserfs_acquire_dquot, |
844 | .release_dquot = reiserfs_release_dquot, |
845 | .mark_dirty = reiserfs_mark_dquot_dirty, |
846 | .write_info = reiserfs_write_info, |
847 | .alloc_dquot = dquot_alloc, |
848 | .destroy_dquot = dquot_destroy, |
849 | .get_next_id = dquot_get_next_id, |
850 | }; |
851 | |
852 | static const struct quotactl_ops reiserfs_qctl_operations = { |
853 | .quota_on = reiserfs_quota_on, |
854 | .quota_off = reiserfs_quota_off, |
855 | .quota_sync = dquot_quota_sync, |
856 | .get_state = dquot_get_state, |
857 | .set_info = dquot_set_dqinfo, |
858 | .get_dqblk = dquot_get_dqblk, |
859 | .set_dqblk = dquot_set_dqblk, |
860 | }; |
861 | #endif |
862 | |
863 | static const struct export_operations reiserfs_export_ops = { |
864 | .encode_fh = reiserfs_encode_fh, |
865 | .fh_to_dentry = reiserfs_fh_to_dentry, |
866 | .fh_to_parent = reiserfs_fh_to_parent, |
867 | .get_parent = reiserfs_get_parent, |
868 | }; |
869 | |
870 | /* |
871 | * this struct is used in reiserfs_getopt () for containing the value for |
872 | * those mount options that have values rather than being toggles. |
873 | */ |
874 | typedef struct { |
875 | char *value; |
876 | /* |
877 | * bitmask which is to set on mount_options bitmask |
878 | * when this value is found, 0 is no bits are to be changed. |
879 | */ |
880 | int setmask; |
881 | /* |
882 | * bitmask which is to clear on mount_options bitmask |
883 | * when this value is found, 0 is no bits are to be changed. |
884 | * This is applied BEFORE setmask |
885 | */ |
886 | int clrmask; |
887 | } arg_desc_t; |
888 | |
889 | /* Set this bit in arg_required to allow empty arguments */ |
890 | #define REISERFS_OPT_ALLOWEMPTY 31 |
891 | |
892 | /* |
893 | * this struct is used in reiserfs_getopt() for describing the |
894 | * set of reiserfs mount options |
895 | */ |
896 | typedef struct { |
897 | char *option_name; |
898 | |
899 | /* 0 if argument is not required, not 0 otherwise */ |
900 | int arg_required; |
901 | |
902 | /* list of values accepted by an option */ |
903 | const arg_desc_t *values; |
904 | |
905 | /* |
906 | * bitmask which is to set on mount_options bitmask |
907 | * when this value is found, 0 is no bits are to be changed. |
908 | */ |
909 | int setmask; |
910 | |
911 | /* |
912 | * bitmask which is to clear on mount_options bitmask |
913 | * when this value is found, 0 is no bits are to be changed. |
914 | * This is applied BEFORE setmask |
915 | */ |
916 | int clrmask; |
917 | } opt_desc_t; |
918 | |
919 | /* possible values for -o data= */ |
920 | static const arg_desc_t logging_mode[] = { |
921 | {"ordered" , 1 << REISERFS_DATA_ORDERED, |
922 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, |
923 | {"journal" , 1 << REISERFS_DATA_LOG, |
924 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, |
925 | {"writeback" , 1 << REISERFS_DATA_WRITEBACK, |
926 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, |
927 | {.value = NULL} |
928 | }; |
929 | |
930 | /* possible values for -o barrier= */ |
931 | static const arg_desc_t barrier_mode[] = { |
932 | {"none" , 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
933 | {"flush" , 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, |
934 | {.value = NULL} |
935 | }; |
936 | |
937 | /* |
938 | * possible values for "-o block-allocator=" and bits which are to be set in |
939 | * s_mount_opt of reiserfs specific part of in-core super block |
940 | */ |
941 | static const arg_desc_t balloc[] = { |
942 | {"noborder" , 1 << REISERFS_NO_BORDER, 0}, |
943 | {"border" , 0, 1 << REISERFS_NO_BORDER}, |
944 | {"no_unhashed_relocation" , 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, |
945 | {"hashed_relocation" , 1 << REISERFS_HASHED_RELOCATION, 0}, |
946 | {"test4" , 1 << REISERFS_TEST4, 0}, |
947 | {"notest4" , 0, 1 << REISERFS_TEST4}, |
948 | {NULL, 0, 0} |
949 | }; |
950 | |
951 | static const arg_desc_t tails[] = { |
952 | {"on" , 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
953 | {"off" , 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, |
954 | {"small" , 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, |
955 | {NULL, 0, 0} |
956 | }; |
957 | |
958 | static const arg_desc_t error_actions[] = { |
959 | {"panic" , 1 << REISERFS_ERROR_PANIC, |
960 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, |
961 | {"ro-remount" , 1 << REISERFS_ERROR_RO, |
962 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, |
963 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
964 | {"continue" , 1 << REISERFS_ERROR_CONTINUE, |
965 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, |
966 | #endif |
967 | {NULL, 0, 0}, |
968 | }; |
969 | |
970 | /* |
971 | * proceed only one option from a list *cur - string containing of mount |
972 | * options |
973 | * opts - array of options which are accepted |
974 | * opt_arg - if option is found and requires an argument and if it is specifed |
975 | * in the input - pointer to the argument is stored here |
976 | * bit_flags - if option requires to set a certain bit - it is set here |
977 | * return -1 if unknown option is found, opt->arg_required otherwise |
978 | */ |
979 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
980 | char **opt_arg, unsigned long *bit_flags) |
981 | { |
982 | char *p; |
983 | /* |
984 | * foo=bar, |
985 | * ^ ^ ^ |
986 | * | | +-- option_end |
987 | * | +-- arg_start |
988 | * +-- option_start |
989 | */ |
990 | const opt_desc_t *opt; |
991 | const arg_desc_t *arg; |
992 | |
993 | p = *cur; |
994 | |
995 | /* assume argument cannot contain commas */ |
996 | *cur = strchr(p, ','); |
997 | if (*cur) { |
998 | *(*cur) = '\0'; |
999 | (*cur)++; |
1000 | } |
1001 | |
1002 | if (!strncmp(p, "alloc=" , 6)) { |
1003 | /* |
1004 | * Ugly special case, probably we should redo options |
1005 | * parser so that it can understand several arguments for |
1006 | * some options, also so that it can fill several bitfields |
1007 | * with option values. |
1008 | */ |
1009 | if (reiserfs_parse_alloc_options(s, p + 6)) { |
1010 | return -1; |
1011 | } else { |
1012 | return 0; |
1013 | } |
1014 | } |
1015 | |
1016 | /* for every option in the list */ |
1017 | for (opt = opts; opt->option_name; opt++) { |
1018 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { |
1019 | if (bit_flags) { |
1020 | if (opt->clrmask == |
1021 | (1 << REISERFS_UNSUPPORTED_OPT)) |
1022 | reiserfs_warning(s, "super-6500" , |
1023 | "%s not supported.\n" , |
1024 | p); |
1025 | else |
1026 | *bit_flags &= ~opt->clrmask; |
1027 | if (opt->setmask == |
1028 | (1 << REISERFS_UNSUPPORTED_OPT)) |
1029 | reiserfs_warning(s, "super-6501" , |
1030 | "%s not supported.\n" , |
1031 | p); |
1032 | else |
1033 | *bit_flags |= opt->setmask; |
1034 | } |
1035 | break; |
1036 | } |
1037 | } |
1038 | if (!opt->option_name) { |
1039 | reiserfs_warning(s, "super-6502" , |
1040 | "unknown mount option \"%s\"" , p); |
1041 | return -1; |
1042 | } |
1043 | |
1044 | p += strlen(opt->option_name); |
1045 | switch (*p) { |
1046 | case '=': |
1047 | if (!opt->arg_required) { |
1048 | reiserfs_warning(s, "super-6503" , |
1049 | "the option \"%s\" does not " |
1050 | "require an argument\n" , |
1051 | opt->option_name); |
1052 | return -1; |
1053 | } |
1054 | break; |
1055 | |
1056 | case 0: |
1057 | if (opt->arg_required) { |
1058 | reiserfs_warning(s, "super-6504" , |
1059 | "the option \"%s\" requires an " |
1060 | "argument\n" , opt->option_name); |
1061 | return -1; |
1062 | } |
1063 | break; |
1064 | default: |
1065 | reiserfs_warning(s, "super-6505" , |
1066 | "head of option \"%s\" is only correct\n" , |
1067 | opt->option_name); |
1068 | return -1; |
1069 | } |
1070 | |
1071 | /* |
1072 | * move to the argument, or to next option if argument is not |
1073 | * required |
1074 | */ |
1075 | p++; |
1076 | |
1077 | if (opt->arg_required |
1078 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) |
1079 | && !strlen(p)) { |
1080 | /* this catches "option=," if not allowed */ |
1081 | reiserfs_warning(s, "super-6506" , |
1082 | "empty argument for \"%s\"\n" , |
1083 | opt->option_name); |
1084 | return -1; |
1085 | } |
1086 | |
1087 | if (!opt->values) { |
1088 | /* *=NULLopt_arg contains pointer to argument */ |
1089 | *opt_arg = p; |
1090 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); |
1091 | } |
1092 | |
1093 | /* values possible for this option are listed in opt->values */ |
1094 | for (arg = opt->values; arg->value; arg++) { |
1095 | if (!strcmp(p, arg->value)) { |
1096 | if (bit_flags) { |
1097 | *bit_flags &= ~arg->clrmask; |
1098 | *bit_flags |= arg->setmask; |
1099 | } |
1100 | return opt->arg_required; |
1101 | } |
1102 | } |
1103 | |
1104 | reiserfs_warning(s, "super-6506" , |
1105 | "bad value \"%s\" for option \"%s\"\n" , p, |
1106 | opt->option_name); |
1107 | return -1; |
1108 | } |
1109 | |
1110 | /* returns 0 if something is wrong in option string, 1 - otherwise */ |
1111 | static int reiserfs_parse_options(struct super_block *s, |
1112 | |
1113 | /* string given via mount's -o */ |
1114 | char *options, |
1115 | |
1116 | /* |
1117 | * after the parsing phase, contains the |
1118 | * collection of bitflags defining what |
1119 | * mount options were selected. |
1120 | */ |
1121 | unsigned long *mount_options, |
1122 | |
1123 | /* strtol-ed from NNN of resize=NNN */ |
1124 | unsigned long *blocks, |
1125 | char **jdev_name, |
1126 | unsigned int *commit_max_age, |
1127 | char **qf_names, |
1128 | unsigned int *qfmt) |
1129 | { |
1130 | int c; |
1131 | char *arg = NULL; |
1132 | char *pos; |
1133 | opt_desc_t opts[] = { |
1134 | /* |
1135 | * Compatibility stuff, so that -o notail for old |
1136 | * setups still work |
1137 | */ |
1138 | {"tails" ,.arg_required = 't',.values = tails}, |
1139 | {"notail" ,.clrmask = |
1140 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, |
1141 | {"conv" ,.setmask = 1 << REISERFS_CONVERT}, |
1142 | {"attrs" ,.setmask = 1 << REISERFS_ATTRS}, |
1143 | {"noattrs" ,.clrmask = 1 << REISERFS_ATTRS}, |
1144 | {"expose_privroot" , .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, |
1145 | #ifdef CONFIG_REISERFS_FS_XATTR |
1146 | {"user_xattr" ,.setmask = 1 << REISERFS_XATTRS_USER}, |
1147 | {"nouser_xattr" ,.clrmask = 1 << REISERFS_XATTRS_USER}, |
1148 | #else |
1149 | {"user_xattr" ,.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1150 | {"nouser_xattr" ,.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1151 | #endif |
1152 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
1153 | {"acl" ,.setmask = 1 << REISERFS_POSIXACL}, |
1154 | {"noacl" ,.clrmask = 1 << REISERFS_POSIXACL}, |
1155 | #else |
1156 | {"acl" ,.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1157 | {"noacl" ,.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1158 | #endif |
1159 | {.option_name = "nolog" }, |
1160 | {"replayonly" ,.setmask = 1 << REPLAYONLY}, |
1161 | {"block-allocator" ,.arg_required = 'a',.values = balloc}, |
1162 | {"data" ,.arg_required = 'd',.values = logging_mode}, |
1163 | {"barrier" ,.arg_required = 'b',.values = barrier_mode}, |
1164 | {"resize" ,.arg_required = 'r',.values = NULL}, |
1165 | {"jdev" ,.arg_required = 'j',.values = NULL}, |
1166 | {"nolargeio" ,.arg_required = 'w',.values = NULL}, |
1167 | {"commit" ,.arg_required = 'c',.values = NULL}, |
1168 | {"usrquota" ,.setmask = 1 << REISERFS_USRQUOTA}, |
1169 | {"grpquota" ,.setmask = 1 << REISERFS_GRPQUOTA}, |
1170 | {"noquota" ,.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, |
1171 | {"errors" ,.arg_required = 'e',.values = error_actions}, |
1172 | {"usrjquota" ,.arg_required = |
1173 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, |
1174 | {"grpjquota" ,.arg_required = |
1175 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, |
1176 | {"jqfmt" ,.arg_required = 'f',.values = NULL}, |
1177 | {.option_name = NULL} |
1178 | }; |
1179 | |
1180 | *blocks = 0; |
1181 | if (!options || !*options) |
1182 | /* |
1183 | * use default configuration: create tails, journaling on, no |
1184 | * conversion to newest format |
1185 | */ |
1186 | return 1; |
1187 | |
1188 | for (pos = options; pos;) { |
1189 | c = reiserfs_getopt(s, cur: &pos, opts, opt_arg: &arg, bit_flags: mount_options); |
1190 | if (c == -1) |
1191 | /* wrong option is given */ |
1192 | return 0; |
1193 | |
1194 | if (c == 'r') { |
1195 | char *p; |
1196 | |
1197 | p = NULL; |
1198 | /* "resize=NNN" or "resize=auto" */ |
1199 | |
1200 | if (!strcmp(arg, "auto" )) { |
1201 | /* From JFS code, to auto-get the size. */ |
1202 | *blocks = sb_bdev_nr_blocks(sb: s); |
1203 | } else { |
1204 | *blocks = simple_strtoul(arg, &p, 0); |
1205 | if (*p != '\0') { |
1206 | /* NNN does not look like a number */ |
1207 | reiserfs_warning(s, "super-6507" , |
1208 | "bad value %s for " |
1209 | "-oresize\n" , arg); |
1210 | return 0; |
1211 | } |
1212 | } |
1213 | } |
1214 | |
1215 | if (c == 'c') { |
1216 | char *p = NULL; |
1217 | unsigned long val = simple_strtoul(arg, &p, 0); |
1218 | /* commit=NNN (time in seconds) */ |
1219 | if (*p != '\0' || val >= (unsigned int)-1) { |
1220 | reiserfs_warning(s, "super-6508" , |
1221 | "bad value %s for -ocommit\n" , |
1222 | arg); |
1223 | return 0; |
1224 | } |
1225 | *commit_max_age = (unsigned int)val; |
1226 | } |
1227 | |
1228 | if (c == 'w') { |
1229 | reiserfs_warning(s, "super-6509" , "nolargeio option " |
1230 | "is no longer supported" ); |
1231 | return 0; |
1232 | } |
1233 | |
1234 | if (c == 'j') { |
1235 | if (arg && *arg && jdev_name) { |
1236 | /* Hm, already assigned? */ |
1237 | if (*jdev_name) { |
1238 | reiserfs_warning(s, "super-6510" , |
1239 | "journal device was " |
1240 | "already specified to " |
1241 | "be %s" , *jdev_name); |
1242 | return 0; |
1243 | } |
1244 | *jdev_name = arg; |
1245 | } |
1246 | } |
1247 | #ifdef CONFIG_QUOTA |
1248 | if (c == 'u' || c == 'g') { |
1249 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; |
1250 | |
1251 | if (sb_any_quota_loaded(sb: s) && |
1252 | (!*arg != !REISERFS_SB(sb: s)->s_qf_names[qtype])) { |
1253 | reiserfs_warning(s, "super-6511" , |
1254 | "cannot change journaled " |
1255 | "quota options when quota " |
1256 | "turned on." ); |
1257 | return 0; |
1258 | } |
1259 | if (qf_names[qtype] != |
1260 | REISERFS_SB(sb: s)->s_qf_names[qtype]) |
1261 | kfree(objp: qf_names[qtype]); |
1262 | qf_names[qtype] = NULL; |
1263 | if (*arg) { /* Some filename specified? */ |
1264 | if (REISERFS_SB(sb: s)->s_qf_names[qtype] |
1265 | && strcmp(REISERFS_SB(sb: s)->s_qf_names[qtype], |
1266 | arg)) { |
1267 | reiserfs_warning(s, "super-6512" , |
1268 | "%s quota file " |
1269 | "already specified." , |
1270 | QTYPE2NAME(qtype)); |
1271 | return 0; |
1272 | } |
1273 | if (strchr(arg, '/')) { |
1274 | reiserfs_warning(s, "super-6513" , |
1275 | "quotafile must be " |
1276 | "on filesystem root." ); |
1277 | return 0; |
1278 | } |
1279 | qf_names[qtype] = kstrdup(s: arg, GFP_KERNEL); |
1280 | if (!qf_names[qtype]) { |
1281 | reiserfs_warning(s, "reiserfs-2502" , |
1282 | "not enough memory " |
1283 | "for storing " |
1284 | "quotafile name." ); |
1285 | return 0; |
1286 | } |
1287 | if (qtype == USRQUOTA) |
1288 | *mount_options |= 1 << REISERFS_USRQUOTA; |
1289 | else |
1290 | *mount_options |= 1 << REISERFS_GRPQUOTA; |
1291 | } else { |
1292 | if (qtype == USRQUOTA) |
1293 | *mount_options &= ~(1 << REISERFS_USRQUOTA); |
1294 | else |
1295 | *mount_options &= ~(1 << REISERFS_GRPQUOTA); |
1296 | } |
1297 | } |
1298 | if (c == 'f') { |
1299 | if (!strcmp(arg, "vfsold" )) |
1300 | *qfmt = QFMT_VFS_OLD; |
1301 | else if (!strcmp(arg, "vfsv0" )) |
1302 | *qfmt = QFMT_VFS_V0; |
1303 | else { |
1304 | reiserfs_warning(s, "super-6514" , |
1305 | "unknown quota format " |
1306 | "specified." ); |
1307 | return 0; |
1308 | } |
1309 | if (sb_any_quota_loaded(sb: s) && |
1310 | *qfmt != REISERFS_SB(sb: s)->s_jquota_fmt) { |
1311 | reiserfs_warning(s, "super-6515" , |
1312 | "cannot change journaled " |
1313 | "quota options when quota " |
1314 | "turned on." ); |
1315 | return 0; |
1316 | } |
1317 | } |
1318 | #else |
1319 | if (c == 'u' || c == 'g' || c == 'f') { |
1320 | reiserfs_warning(s, "reiserfs-2503" , "journaled " |
1321 | "quota options not supported." ); |
1322 | return 0; |
1323 | } |
1324 | #endif |
1325 | } |
1326 | |
1327 | #ifdef CONFIG_QUOTA |
1328 | if (!REISERFS_SB(sb: s)->s_jquota_fmt && !*qfmt |
1329 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { |
1330 | reiserfs_warning(s, "super-6515" , |
1331 | "journaled quota format not specified." ); |
1332 | return 0; |
1333 | } |
1334 | if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && |
1335 | sb_has_quota_loaded(sb: s, type: USRQUOTA)) || |
1336 | (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && |
1337 | sb_has_quota_loaded(sb: s, type: GRPQUOTA))) { |
1338 | reiserfs_warning(s, "super-6516" , "quota options must " |
1339 | "be present when quota is turned on." ); |
1340 | return 0; |
1341 | } |
1342 | #endif |
1343 | |
1344 | return 1; |
1345 | } |
1346 | |
1347 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1348 | { |
1349 | REISERFS_SB(sb: s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | |
1350 | (1 << REISERFS_DATA_ORDERED) | |
1351 | (1 << REISERFS_DATA_WRITEBACK)); |
1352 | REISERFS_SB(sb: s)->s_mount_opt |= (1 << mode); |
1353 | } |
1354 | |
1355 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) |
1356 | { |
1357 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1358 | if (!reiserfs_data_log(s)) { |
1359 | switch_data_mode(s, mode: REISERFS_DATA_LOG); |
1360 | reiserfs_info(s, fmt: "switching to journaled data mode\n" ); |
1361 | } |
1362 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { |
1363 | if (!reiserfs_data_ordered(s)) { |
1364 | switch_data_mode(s, mode: REISERFS_DATA_ORDERED); |
1365 | reiserfs_info(s, fmt: "switching to ordered data mode\n" ); |
1366 | } |
1367 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { |
1368 | if (!reiserfs_data_writeback(s)) { |
1369 | switch_data_mode(s, mode: REISERFS_DATA_WRITEBACK); |
1370 | reiserfs_info(s, fmt: "switching to writeback data mode\n" ); |
1371 | } |
1372 | } |
1373 | } |
1374 | |
1375 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1376 | { |
1377 | int flush = (1 << REISERFS_BARRIER_FLUSH); |
1378 | int none = (1 << REISERFS_BARRIER_NONE); |
1379 | int all_barrier = flush | none; |
1380 | |
1381 | if (bits & all_barrier) { |
1382 | REISERFS_SB(sb: s)->s_mount_opt &= ~all_barrier; |
1383 | if (bits & flush) { |
1384 | REISERFS_SB(sb: s)->s_mount_opt |= flush; |
1385 | printk("reiserfs: enabling write barrier flush mode\n" ); |
1386 | } else if (bits & none) { |
1387 | REISERFS_SB(sb: s)->s_mount_opt |= none; |
1388 | printk("reiserfs: write barriers turned off\n" ); |
1389 | } |
1390 | } |
1391 | } |
1392 | |
1393 | static void handle_attrs(struct super_block *s) |
1394 | { |
1395 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1396 | |
1397 | if (reiserfs_attrs(s)) { |
1398 | if (old_format_only(s)) { |
1399 | reiserfs_warning(s, "super-6517" , "cannot support " |
1400 | "attributes on 3.5.x disk format" ); |
1401 | REISERFS_SB(sb: s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1402 | return; |
1403 | } |
1404 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
1405 | reiserfs_warning(s, "super-6518" , "cannot support " |
1406 | "attributes until flag is set in " |
1407 | "super-block" ); |
1408 | REISERFS_SB(sb: s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1409 | } |
1410 | } |
1411 | } |
1412 | |
1413 | #ifdef CONFIG_QUOTA |
1414 | static void handle_quota_files(struct super_block *s, char **qf_names, |
1415 | unsigned int *qfmt) |
1416 | { |
1417 | int i; |
1418 | |
1419 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
1420 | if (qf_names[i] != REISERFS_SB(sb: s)->s_qf_names[i]) |
1421 | kfree(objp: REISERFS_SB(sb: s)->s_qf_names[i]); |
1422 | REISERFS_SB(sb: s)->s_qf_names[i] = qf_names[i]; |
1423 | } |
1424 | if (*qfmt) |
1425 | REISERFS_SB(sb: s)->s_jquota_fmt = *qfmt; |
1426 | } |
1427 | #endif |
1428 | |
1429 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1430 | { |
1431 | struct reiserfs_super_block *rs; |
1432 | struct reiserfs_transaction_handle th; |
1433 | unsigned long blocks; |
1434 | unsigned long mount_options = REISERFS_SB(sb: s)->s_mount_opt; |
1435 | unsigned long safe_mask = 0; |
1436 | unsigned int commit_max_age = (unsigned int)-1; |
1437 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
1438 | int err; |
1439 | char *qf_names[REISERFS_MAXQUOTAS]; |
1440 | unsigned int qfmt = 0; |
1441 | #ifdef CONFIG_QUOTA |
1442 | int i; |
1443 | #endif |
1444 | |
1445 | sync_filesystem(s); |
1446 | reiserfs_write_lock(s); |
1447 | |
1448 | #ifdef CONFIG_QUOTA |
1449 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); |
1450 | #endif |
1451 | |
1452 | rs = SB_DISK_SUPER_BLOCK(s); |
1453 | |
1454 | if (!reiserfs_parse_options |
1455 | (s, options: arg, mount_options: &mount_options, blocks: &blocks, NULL, commit_max_age: &commit_max_age, |
1456 | qf_names, qfmt: &qfmt)) { |
1457 | #ifdef CONFIG_QUOTA |
1458 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) |
1459 | if (qf_names[i] != REISERFS_SB(sb: s)->s_qf_names[i]) |
1460 | kfree(objp: qf_names[i]); |
1461 | #endif |
1462 | err = -EINVAL; |
1463 | goto out_err_unlock; |
1464 | } |
1465 | #ifdef CONFIG_QUOTA |
1466 | handle_quota_files(s, qf_names, qfmt: &qfmt); |
1467 | #endif |
1468 | |
1469 | handle_attrs(s); |
1470 | |
1471 | /* Add options that are safe here */ |
1472 | safe_mask |= 1 << REISERFS_SMALLTAIL; |
1473 | safe_mask |= 1 << REISERFS_LARGETAIL; |
1474 | safe_mask |= 1 << REISERFS_NO_BORDER; |
1475 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; |
1476 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; |
1477 | safe_mask |= 1 << REISERFS_TEST4; |
1478 | safe_mask |= 1 << REISERFS_ATTRS; |
1479 | safe_mask |= 1 << REISERFS_XATTRS_USER; |
1480 | safe_mask |= 1 << REISERFS_POSIXACL; |
1481 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; |
1482 | safe_mask |= 1 << REISERFS_BARRIER_NONE; |
1483 | safe_mask |= 1 << REISERFS_ERROR_RO; |
1484 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; |
1485 | safe_mask |= 1 << REISERFS_ERROR_PANIC; |
1486 | safe_mask |= 1 << REISERFS_USRQUOTA; |
1487 | safe_mask |= 1 << REISERFS_GRPQUOTA; |
1488 | |
1489 | /* |
1490 | * Update the bitmask, taking care to keep |
1491 | * the bits we're not allowed to change here |
1492 | */ |
1493 | REISERFS_SB(sb: s)->s_mount_opt = |
1494 | (REISERFS_SB(sb: s)-> |
1495 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); |
1496 | |
1497 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { |
1498 | journal->j_max_commit_age = commit_max_age; |
1499 | journal->j_max_trans_age = commit_max_age; |
1500 | } else if (commit_max_age == 0) { |
1501 | /* 0 means restore defaults. */ |
1502 | journal->j_max_commit_age = journal->j_default_max_commit_age; |
1503 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; |
1504 | } |
1505 | |
1506 | if (blocks) { |
1507 | err = reiserfs_resize(s, blocks); |
1508 | if (err != 0) |
1509 | goto out_err_unlock; |
1510 | } |
1511 | |
1512 | if (*mount_flags & SB_RDONLY) { |
1513 | reiserfs_write_unlock(s); |
1514 | reiserfs_xattr_init(sb: s, mount_flags: *mount_flags); |
1515 | /* remount read-only */ |
1516 | if (sb_rdonly(sb: s)) |
1517 | /* it is read-only already */ |
1518 | goto out_ok_unlocked; |
1519 | |
1520 | err = dquot_suspend(sb: s, type: -1); |
1521 | if (err < 0) |
1522 | goto out_err; |
1523 | |
1524 | /* try to remount file system with read-only permissions */ |
1525 | if (sb_umount_state(rs) == REISERFS_VALID_FS |
1526 | || REISERFS_SB(sb: s)->s_mount_state != REISERFS_VALID_FS) { |
1527 | goto out_ok_unlocked; |
1528 | } |
1529 | |
1530 | reiserfs_write_lock(s); |
1531 | |
1532 | err = journal_begin(&th, sb: s, 10); |
1533 | if (err) |
1534 | goto out_err_unlock; |
1535 | |
1536 | /* Mounting a rw partition read-only. */ |
1537 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), wait: 1); |
1538 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); |
1539 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
1540 | } else { |
1541 | /* remount read-write */ |
1542 | if (!sb_rdonly(sb: s)) { |
1543 | reiserfs_write_unlock(s); |
1544 | reiserfs_xattr_init(sb: s, mount_flags: *mount_flags); |
1545 | goto out_ok_unlocked; /* We are read-write already */ |
1546 | } |
1547 | |
1548 | if (reiserfs_is_journal_aborted(journal)) { |
1549 | err = journal->j_errno; |
1550 | goto out_err_unlock; |
1551 | } |
1552 | |
1553 | handle_data_mode(s, mount_options); |
1554 | handle_barrier_mode(s, bits: mount_options); |
1555 | REISERFS_SB(sb: s)->s_mount_state = sb_umount_state(rs); |
1556 | |
1557 | /* now it is safe to call journal_begin */ |
1558 | s->s_flags &= ~SB_RDONLY; |
1559 | err = journal_begin(&th, sb: s, 10); |
1560 | if (err) |
1561 | goto out_err_unlock; |
1562 | |
1563 | /* Mount a partition which is read-only, read-write */ |
1564 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), wait: 1); |
1565 | REISERFS_SB(sb: s)->s_mount_state = sb_umount_state(rs); |
1566 | s->s_flags &= ~SB_RDONLY; |
1567 | set_sb_umount_state(rs, REISERFS_ERROR_FS); |
1568 | if (!old_format_only(s)) |
1569 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); |
1570 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
1571 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
1572 | REISERFS_SB(sb: s)->s_mount_state = REISERFS_VALID_FS; |
1573 | } |
1574 | /* this will force a full flush of all journal lists */ |
1575 | SB_JOURNAL(s)->j_must_wait = 1; |
1576 | err = journal_end(&th); |
1577 | if (err) |
1578 | goto out_err_unlock; |
1579 | |
1580 | reiserfs_write_unlock(s); |
1581 | if (!(*mount_flags & SB_RDONLY)) { |
1582 | dquot_resume(sb: s, type: -1); |
1583 | reiserfs_write_lock(s); |
1584 | finish_unfinished(s); |
1585 | reiserfs_write_unlock(s); |
1586 | reiserfs_xattr_init(sb: s, mount_flags: *mount_flags); |
1587 | } |
1588 | |
1589 | out_ok_unlocked: |
1590 | return 0; |
1591 | |
1592 | out_err_unlock: |
1593 | reiserfs_write_unlock(s); |
1594 | out_err: |
1595 | return err; |
1596 | } |
1597 | |
1598 | static int read_super_block(struct super_block *s, int offset) |
1599 | { |
1600 | struct buffer_head *bh; |
1601 | struct reiserfs_super_block *rs; |
1602 | int fs_blocksize; |
1603 | |
1604 | bh = sb_bread(sb: s, block: offset / s->s_blocksize); |
1605 | if (!bh) { |
1606 | reiserfs_warning(s, "sh-2006" , |
1607 | "bread failed (dev %s, block %lu, size %lu)" , |
1608 | s->s_id, offset / s->s_blocksize, |
1609 | s->s_blocksize); |
1610 | return 1; |
1611 | } |
1612 | |
1613 | rs = (struct reiserfs_super_block *)bh->b_data; |
1614 | if (!is_any_reiserfs_magic_string(rs)) { |
1615 | brelse(bh); |
1616 | return 1; |
1617 | } |
1618 | /* |
1619 | * ok, reiserfs signature (old or new) found in at the given offset |
1620 | */ |
1621 | fs_blocksize = sb_blocksize(rs); |
1622 | brelse(bh); |
1623 | sb_set_blocksize(s, fs_blocksize); |
1624 | |
1625 | bh = sb_bread(sb: s, block: offset / s->s_blocksize); |
1626 | if (!bh) { |
1627 | reiserfs_warning(s, "sh-2007" , |
1628 | "bread failed (dev %s, block %lu, size %lu)" , |
1629 | s->s_id, offset / s->s_blocksize, |
1630 | s->s_blocksize); |
1631 | return 1; |
1632 | } |
1633 | |
1634 | rs = (struct reiserfs_super_block *)bh->b_data; |
1635 | if (sb_blocksize(rs) != s->s_blocksize) { |
1636 | reiserfs_warning(s, "sh-2011" , "can't find a reiserfs " |
1637 | "filesystem on (dev %s, block %llu, size %lu)" , |
1638 | s->s_id, |
1639 | (unsigned long long)bh->b_blocknr, |
1640 | s->s_blocksize); |
1641 | brelse(bh); |
1642 | return 1; |
1643 | } |
1644 | |
1645 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
1646 | brelse(bh); |
1647 | reiserfs_warning(s, "super-6519" , "Unfinished reiserfsck " |
1648 | "--rebuild-tree run detected. Please run\n" |
1649 | "reiserfsck --rebuild-tree and wait for a " |
1650 | "completion. If that fails\n" |
1651 | "get newer reiserfsprogs package" ); |
1652 | return 1; |
1653 | } |
1654 | |
1655 | reiserfs_warning(NULL, "" , "reiserfs filesystem is deprecated and " |
1656 | "scheduled to be removed from the kernel in 2025" ); |
1657 | SB_BUFFER_WITH_SB(s) = bh; |
1658 | SB_DISK_SUPER_BLOCK(s) = rs; |
1659 | |
1660 | /* |
1661 | * magic is of non-standard journal filesystem, look at s_version to |
1662 | * find which format is in use |
1663 | */ |
1664 | if (is_reiserfs_jr(rs)) { |
1665 | if (sb_version(rs) == REISERFS_VERSION_2) |
1666 | reiserfs_info(s, fmt: "found reiserfs format \"3.6\"" |
1667 | " with non-standard journal\n" ); |
1668 | else if (sb_version(rs) == REISERFS_VERSION_1) |
1669 | reiserfs_info(s, fmt: "found reiserfs format \"3.5\"" |
1670 | " with non-standard journal\n" ); |
1671 | else { |
1672 | reiserfs_warning(s, "sh-2012" , "found unknown " |
1673 | "format \"%u\" of reiserfs with " |
1674 | "non-standard magic" , sb_version(rs)); |
1675 | return 1; |
1676 | } |
1677 | } else |
1678 | /* |
1679 | * s_version of standard format may contain incorrect |
1680 | * information, so we just look at the magic string |
1681 | */ |
1682 | reiserfs_info(s, |
1683 | fmt: "found reiserfs format \"%s\" with standard journal\n" , |
1684 | is_reiserfs_3_5(rs) ? "3.5" : "3.6" ); |
1685 | |
1686 | s->s_op = &reiserfs_sops; |
1687 | s->s_export_op = &reiserfs_export_ops; |
1688 | #ifdef CONFIG_QUOTA |
1689 | s->s_qcop = &reiserfs_qctl_operations; |
1690 | s->dq_op = &reiserfs_quota_operations; |
1691 | s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
1692 | #endif |
1693 | |
1694 | /* |
1695 | * new format is limited by the 32 bit wide i_blocks field, want to |
1696 | * be one full block below that. |
1697 | */ |
1698 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; |
1699 | return 0; |
1700 | } |
1701 | |
1702 | /* after journal replay, reread all bitmap and super blocks */ |
1703 | static int reread_meta_blocks(struct super_block *s) |
1704 | { |
1705 | if (bh_read(SB_BUFFER_WITH_SB(s), op_flags: 0) < 0) { |
1706 | reiserfs_warning(s, "reiserfs-2504" , "error reading the super" ); |
1707 | return 1; |
1708 | } |
1709 | |
1710 | return 0; |
1711 | } |
1712 | |
1713 | /* hash detection stuff */ |
1714 | |
1715 | /* |
1716 | * if root directory is empty - we set default - Yura's - hash and |
1717 | * warn about it |
1718 | * FIXME: we look for only one name in a directory. If tea and yura |
1719 | * both have the same value - we ask user to send report to the |
1720 | * mailing list |
1721 | */ |
1722 | static __u32 find_hash_out(struct super_block *s) |
1723 | { |
1724 | int retval; |
1725 | struct inode *inode; |
1726 | struct cpu_key key; |
1727 | INITIALIZE_PATH(path); |
1728 | struct reiserfs_dir_entry de; |
1729 | struct reiserfs_de_head *deh; |
1730 | __u32 hash = DEFAULT_HASH; |
1731 | __u32 deh_hashval, teahash, r5hash, yurahash; |
1732 | |
1733 | inode = d_inode(dentry: s->s_root); |
1734 | |
1735 | make_cpu_key(cpu_key: &key, inode, offset: ~0, TYPE_DIRENTRY, key_length: 3); |
1736 | retval = search_by_entry_key(sb: s, key: &key, path: &path, de: &de); |
1737 | if (retval == IO_ERROR) { |
1738 | pathrelse(search_path: &path); |
1739 | return UNSET_HASH; |
1740 | } |
1741 | if (retval == NAME_NOT_FOUND) |
1742 | de.de_entry_num--; |
1743 | |
1744 | set_de_name_and_namelen(&de); |
1745 | deh = de.de_deh + de.de_entry_num; |
1746 | |
1747 | if (deh_offset(deh) == DOT_DOT_OFFSET) { |
1748 | /* allow override in this case */ |
1749 | if (reiserfs_rupasov_hash(s)) |
1750 | hash = YURA_HASH; |
1751 | reiserfs_info(s, fmt: "FS seems to be empty, autodetect is using the default hash\n" ); |
1752 | goto out; |
1753 | } |
1754 | |
1755 | deh_hashval = GET_HASH_VALUE(deh_offset(deh)); |
1756 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); |
1757 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); |
1758 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); |
1759 | |
1760 | if ((teahash == r5hash && deh_hashval == r5hash) || |
1761 | (teahash == yurahash && deh_hashval == yurahash) || |
1762 | (r5hash == yurahash && deh_hashval == yurahash)) { |
1763 | reiserfs_warning(s, "reiserfs-2506" , |
1764 | "Unable to automatically detect hash " |
1765 | "function. Please mount with -o " |
1766 | "hash={tea,rupasov,r5}" ); |
1767 | hash = UNSET_HASH; |
1768 | goto out; |
1769 | } |
1770 | |
1771 | if (deh_hashval == yurahash) |
1772 | hash = YURA_HASH; |
1773 | else if (deh_hashval == teahash) |
1774 | hash = TEA_HASH; |
1775 | else if (deh_hashval == r5hash) |
1776 | hash = R5_HASH; |
1777 | else { |
1778 | reiserfs_warning(s, "reiserfs-2506" , |
1779 | "Unrecognised hash function" ); |
1780 | hash = UNSET_HASH; |
1781 | } |
1782 | out: |
1783 | pathrelse(search_path: &path); |
1784 | return hash; |
1785 | } |
1786 | |
1787 | /* finds out which hash names are sorted with */ |
1788 | static int what_hash(struct super_block *s) |
1789 | { |
1790 | __u32 code; |
1791 | |
1792 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); |
1793 | |
1794 | /* |
1795 | * reiserfs_hash_detect() == true if any of the hash mount options |
1796 | * were used. We must check them to make sure the user isn't |
1797 | * using a bad hash value |
1798 | */ |
1799 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) |
1800 | code = find_hash_out(s); |
1801 | |
1802 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { |
1803 | /* |
1804 | * detection has found the hash, and we must check against the |
1805 | * mount options |
1806 | */ |
1807 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { |
1808 | reiserfs_warning(s, "reiserfs-2507" , |
1809 | "Error, %s hash detected, " |
1810 | "unable to force rupasov hash" , |
1811 | reiserfs_hashname(code)); |
1812 | code = UNSET_HASH; |
1813 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { |
1814 | reiserfs_warning(s, "reiserfs-2508" , |
1815 | "Error, %s hash detected, " |
1816 | "unable to force tea hash" , |
1817 | reiserfs_hashname(code)); |
1818 | code = UNSET_HASH; |
1819 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { |
1820 | reiserfs_warning(s, "reiserfs-2509" , |
1821 | "Error, %s hash detected, " |
1822 | "unable to force r5 hash" , |
1823 | reiserfs_hashname(code)); |
1824 | code = UNSET_HASH; |
1825 | } |
1826 | } else { |
1827 | /* |
1828 | * find_hash_out was not called or |
1829 | * could not determine the hash |
1830 | */ |
1831 | if (reiserfs_rupasov_hash(s)) { |
1832 | code = YURA_HASH; |
1833 | } else if (reiserfs_tea_hash(s)) { |
1834 | code = TEA_HASH; |
1835 | } else if (reiserfs_r5_hash(s)) { |
1836 | code = R5_HASH; |
1837 | } |
1838 | } |
1839 | |
1840 | /* |
1841 | * if we are mounted RW, and we have a new valid hash code, update |
1842 | * the super |
1843 | */ |
1844 | if (code != UNSET_HASH && |
1845 | !sb_rdonly(sb: s) && |
1846 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { |
1847 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); |
1848 | } |
1849 | return code; |
1850 | } |
1851 | |
1852 | /* return pointer to appropriate function */ |
1853 | static hashf_t hash_function(struct super_block *s) |
1854 | { |
1855 | switch (what_hash(s)) { |
1856 | case TEA_HASH: |
1857 | reiserfs_info(s, fmt: "Using tea hash to sort names\n" ); |
1858 | return keyed_hash; |
1859 | case YURA_HASH: |
1860 | reiserfs_info(s, fmt: "Using rupasov hash to sort names\n" ); |
1861 | return yura_hash; |
1862 | case R5_HASH: |
1863 | reiserfs_info(s, fmt: "Using r5 hash to sort names\n" ); |
1864 | return r5_hash; |
1865 | } |
1866 | return NULL; |
1867 | } |
1868 | |
1869 | /* this is used to set up correct value for old partitions */ |
1870 | static int function2code(hashf_t func) |
1871 | { |
1872 | if (func == keyed_hash) |
1873 | return TEA_HASH; |
1874 | if (func == yura_hash) |
1875 | return YURA_HASH; |
1876 | if (func == r5_hash) |
1877 | return R5_HASH; |
1878 | |
1879 | BUG(); /* should never happen */ |
1880 | |
1881 | return 0; |
1882 | } |
1883 | |
1884 | #define SWARN(silent, s, id, ...) \ |
1885 | if (!(silent)) \ |
1886 | reiserfs_warning(s, id, __VA_ARGS__) |
1887 | |
1888 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1889 | { |
1890 | struct inode *root_inode; |
1891 | struct reiserfs_transaction_handle th; |
1892 | int old_format = 0; |
1893 | unsigned long blocks; |
1894 | unsigned int commit_max_age = 0; |
1895 | int jinit_done = 0; |
1896 | struct reiserfs_iget_args args; |
1897 | struct reiserfs_super_block *rs; |
1898 | char *jdev_name; |
1899 | struct reiserfs_sb_info *sbi; |
1900 | int errval = -EINVAL; |
1901 | char *qf_names[REISERFS_MAXQUOTAS] = {}; |
1902 | unsigned int qfmt = 0; |
1903 | |
1904 | sbi = kzalloc(size: sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
1905 | if (!sbi) |
1906 | return -ENOMEM; |
1907 | s->s_fs_info = sbi; |
1908 | /* Set default values for options: non-aggressive tails, RO on errors */ |
1909 | sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); |
1910 | sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); |
1911 | sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); |
1912 | /* no preallocation minimum, be smart in reiserfs_file_write instead */ |
1913 | sbi->s_alloc_options.preallocmin = 0; |
1914 | /* Preallocate by 16 blocks (17-1) at once */ |
1915 | sbi->s_alloc_options.preallocsize = 17; |
1916 | /* setup default block allocator options */ |
1917 | reiserfs_init_alloc_options(s); |
1918 | |
1919 | spin_lock_init(&sbi->old_work_lock); |
1920 | INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); |
1921 | mutex_init(&sbi->lock); |
1922 | sbi->lock_depth = -1; |
1923 | |
1924 | sbi->commit_wq = alloc_workqueue(fmt: "reiserfs/%s" , flags: WQ_MEM_RECLAIM, max_active: 0, |
1925 | s->s_id); |
1926 | if (!sbi->commit_wq) { |
1927 | SWARN(silent, s, "" , "Cannot allocate commit workqueue" ); |
1928 | errval = -ENOMEM; |
1929 | goto error_unlocked; |
1930 | } |
1931 | |
1932 | jdev_name = NULL; |
1933 | if (reiserfs_parse_options |
1934 | (s, options: (char *)data, mount_options: &sbi->s_mount_opt, blocks: &blocks, jdev_name: &jdev_name, |
1935 | commit_max_age: &commit_max_age, qf_names, qfmt: &qfmt) == 0) { |
1936 | goto error_unlocked; |
1937 | } |
1938 | if (jdev_name && jdev_name[0]) { |
1939 | sbi->s_jdev = kstrdup(s: jdev_name, GFP_KERNEL); |
1940 | if (!sbi->s_jdev) { |
1941 | SWARN(silent, s, "" , "Cannot allocate memory for " |
1942 | "journal device name" ); |
1943 | goto error_unlocked; |
1944 | } |
1945 | } |
1946 | #ifdef CONFIG_QUOTA |
1947 | handle_quota_files(s, qf_names, qfmt: &qfmt); |
1948 | #endif |
1949 | |
1950 | if (blocks) { |
1951 | SWARN(silent, s, "jmacd-7" , "resize option for remount only" ); |
1952 | goto error_unlocked; |
1953 | } |
1954 | |
1955 | /* |
1956 | * try old format (undistributed bitmap, super block in 8-th 1k |
1957 | * block of a device) |
1958 | */ |
1959 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) |
1960 | old_format = 1; |
1961 | |
1962 | /* |
1963 | * try new format (64-th 1k block), which can contain reiserfs |
1964 | * super block |
1965 | */ |
1966 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { |
1967 | SWARN(silent, s, "sh-2021" , "can not find reiserfs on %s" , |
1968 | s->s_id); |
1969 | goto error_unlocked; |
1970 | } |
1971 | |
1972 | s->s_time_min = 0; |
1973 | s->s_time_max = U32_MAX; |
1974 | |
1975 | rs = SB_DISK_SUPER_BLOCK(s); |
1976 | /* |
1977 | * Let's do basic sanity check to verify that underlying device is not |
1978 | * smaller than the filesystem. If the check fails then abort and |
1979 | * scream, because bad stuff will happen otherwise. |
1980 | */ |
1981 | if (bdev_nr_bytes(bdev: s->s_bdev) < sb_block_count(rs) * sb_blocksize(rs)) { |
1982 | SWARN(silent, s, "" , "Filesystem cannot be " |
1983 | "mounted because it is bigger than the device" ); |
1984 | SWARN(silent, s, "" , "You may need to run fsck " |
1985 | "or increase size of your LVM partition" ); |
1986 | SWARN(silent, s, "" , "Or may be you forgot to " |
1987 | "reboot after fdisk when it told you to" ); |
1988 | goto error_unlocked; |
1989 | } |
1990 | |
1991 | sbi->s_mount_state = SB_REISERFS_STATE(s); |
1992 | sbi->s_mount_state = REISERFS_VALID_FS; |
1993 | |
1994 | if ((errval = reiserfs_init_bitmap_cache(sb: s))) { |
1995 | SWARN(silent, s, "jmacd-8" , "unable to read bitmap" ); |
1996 | goto error_unlocked; |
1997 | } |
1998 | |
1999 | errval = -EINVAL; |
2000 | #ifdef CONFIG_REISERFS_CHECK |
2001 | SWARN(silent, s, "" , "CONFIG_REISERFS_CHECK is set ON" ); |
2002 | SWARN(silent, s, "" , "- it is slow mode for debugging." ); |
2003 | #endif |
2004 | |
2005 | /* make data=ordered the default */ |
2006 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && |
2007 | !reiserfs_data_writeback(s)) { |
2008 | sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); |
2009 | } |
2010 | |
2011 | if (reiserfs_data_log(s)) { |
2012 | reiserfs_info(s, fmt: "using journaled data mode\n" ); |
2013 | } else if (reiserfs_data_ordered(s)) { |
2014 | reiserfs_info(s, fmt: "using ordered data mode\n" ); |
2015 | } else { |
2016 | reiserfs_info(s, fmt: "using writeback data mode\n" ); |
2017 | } |
2018 | if (reiserfs_barrier_flush(s)) { |
2019 | printk("reiserfs: using flush barriers\n" ); |
2020 | } |
2021 | |
2022 | if (journal_init(s, j_dev_name: jdev_name, old_format, commit_max_age)) { |
2023 | SWARN(silent, s, "sh-2022" , |
2024 | "unable to initialize journal space" ); |
2025 | goto error_unlocked; |
2026 | } else { |
2027 | /* |
2028 | * once this is set, journal_release must be called |
2029 | * if we error out of the mount |
2030 | */ |
2031 | jinit_done = 1; |
2032 | } |
2033 | |
2034 | if (reread_meta_blocks(s)) { |
2035 | SWARN(silent, s, "jmacd-9" , |
2036 | "unable to reread meta blocks after journal init" ); |
2037 | goto error_unlocked; |
2038 | } |
2039 | |
2040 | if (replay_only(s)) |
2041 | goto error_unlocked; |
2042 | |
2043 | s->s_xattr = reiserfs_xattr_handlers; |
2044 | |
2045 | if (bdev_read_only(bdev: s->s_bdev) && !sb_rdonly(sb: s)) { |
2046 | SWARN(silent, s, "clm-7000" , |
2047 | "Detected readonly device, marking FS readonly" ); |
2048 | s->s_flags |= SB_RDONLY; |
2049 | } |
2050 | args.objectid = REISERFS_ROOT_OBJECTID; |
2051 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; |
2052 | root_inode = |
2053 | iget5_locked(s, REISERFS_ROOT_OBJECTID, test: reiserfs_find_actor, |
2054 | set: reiserfs_init_locked_inode, (void *)&args); |
2055 | if (!root_inode) { |
2056 | SWARN(silent, s, "jmacd-10" , "get root inode failed" ); |
2057 | goto error_unlocked; |
2058 | } |
2059 | |
2060 | /* |
2061 | * This path assumed to be called with the BKL in the old times. |
2062 | * Now we have inherited the big reiserfs lock from it and many |
2063 | * reiserfs helpers called in the mount path and elsewhere require |
2064 | * this lock to be held even if it's not always necessary. Let's be |
2065 | * conservative and hold it early. The window can be reduced after |
2066 | * careful review of the code. |
2067 | */ |
2068 | reiserfs_write_lock(s); |
2069 | |
2070 | if (root_inode->i_state & I_NEW) { |
2071 | reiserfs_read_locked_inode(inode: root_inode, args: &args); |
2072 | unlock_new_inode(root_inode); |
2073 | } |
2074 | |
2075 | if (!S_ISDIR(root_inode->i_mode) || !inode_get_bytes(inode: root_inode) || |
2076 | !root_inode->i_size) { |
2077 | SWARN(silent, s, "" , "corrupt root inode, run fsck" ); |
2078 | iput(root_inode); |
2079 | errval = -EUCLEAN; |
2080 | goto error; |
2081 | } |
2082 | |
2083 | s->s_root = d_make_root(root_inode); |
2084 | if (!s->s_root) |
2085 | goto error; |
2086 | /* define and initialize hash function */ |
2087 | sbi->s_hash_function = hash_function(s); |
2088 | if (sbi->s_hash_function == NULL) { |
2089 | dput(s->s_root); |
2090 | s->s_root = NULL; |
2091 | goto error; |
2092 | } |
2093 | |
2094 | if (is_reiserfs_3_5(rs) |
2095 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) |
2096 | set_bit(REISERFS_3_5, addr: &sbi->s_properties); |
2097 | else if (old_format) |
2098 | set_bit(REISERFS_OLD_FORMAT, addr: &sbi->s_properties); |
2099 | else |
2100 | set_bit(REISERFS_3_6, addr: &sbi->s_properties); |
2101 | |
2102 | if (!sb_rdonly(sb: s)) { |
2103 | |
2104 | errval = journal_begin(&th, sb: s, 1); |
2105 | if (errval) { |
2106 | dput(s->s_root); |
2107 | s->s_root = NULL; |
2108 | goto error; |
2109 | } |
2110 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), wait: 1); |
2111 | |
2112 | set_sb_umount_state(rs, REISERFS_ERROR_FS); |
2113 | set_sb_fs_state(rs, 0); |
2114 | |
2115 | /* |
2116 | * Clear out s_bmap_nr if it would wrap. We can handle this |
2117 | * case, but older revisions can't. This will cause the |
2118 | * file system to fail mount on those older implementations, |
2119 | * avoiding corruption. -jeffm |
2120 | */ |
2121 | if (bmap_would_wrap(bmap_nr: reiserfs_bmap_count(sb: s)) && |
2122 | sb_bmap_nr(rs) != 0) { |
2123 | reiserfs_warning(s, "super-2030" , "This file system " |
2124 | "claims to use %u bitmap blocks in " |
2125 | "its super block, but requires %u. " |
2126 | "Clearing to zero." , sb_bmap_nr(rs), |
2127 | reiserfs_bmap_count(s)); |
2128 | |
2129 | set_sb_bmap_nr(rs, 0); |
2130 | } |
2131 | |
2132 | if (old_format_only(s)) { |
2133 | /* |
2134 | * filesystem of format 3.5 either with standard |
2135 | * or non-standard journal |
2136 | */ |
2137 | if (convert_reiserfs(s)) { |
2138 | /* and -o conv is given */ |
2139 | if (!silent) |
2140 | reiserfs_info(s, |
2141 | fmt: "converting 3.5 filesystem to the 3.6 format" ); |
2142 | |
2143 | if (is_reiserfs_3_5(rs)) |
2144 | /* |
2145 | * put magic string of 3.6 format. |
2146 | * 2.2 will not be able to |
2147 | * mount this filesystem anymore |
2148 | */ |
2149 | memcpy(rs->s_v1.s_magic, |
2150 | reiserfs_3_6_magic_string, |
2151 | sizeof |
2152 | (reiserfs_3_6_magic_string)); |
2153 | |
2154 | set_sb_version(rs, REISERFS_VERSION_2); |
2155 | reiserfs_convert_objectid_map_v1(s); |
2156 | set_bit(REISERFS_3_6, addr: &sbi->s_properties); |
2157 | clear_bit(REISERFS_3_5, addr: &sbi->s_properties); |
2158 | } else if (!silent) { |
2159 | reiserfs_info(s, fmt: "using 3.5.x disk format\n" ); |
2160 | } |
2161 | } else |
2162 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); |
2163 | |
2164 | |
2165 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
2166 | errval = journal_end(&th); |
2167 | if (errval) { |
2168 | dput(s->s_root); |
2169 | s->s_root = NULL; |
2170 | goto error; |
2171 | } |
2172 | |
2173 | reiserfs_write_unlock(s); |
2174 | if ((errval = reiserfs_lookup_privroot(sb: s)) || |
2175 | (errval = reiserfs_xattr_init(sb: s, mount_flags: s->s_flags))) { |
2176 | dput(s->s_root); |
2177 | s->s_root = NULL; |
2178 | goto error_unlocked; |
2179 | } |
2180 | reiserfs_write_lock(s); |
2181 | |
2182 | /* |
2183 | * look for files which were to be removed in previous session |
2184 | */ |
2185 | finish_unfinished(s); |
2186 | } else { |
2187 | if (old_format_only(s) && !silent) { |
2188 | reiserfs_info(s, fmt: "using 3.5.x disk format\n" ); |
2189 | } |
2190 | |
2191 | reiserfs_write_unlock(s); |
2192 | if ((errval = reiserfs_lookup_privroot(sb: s)) || |
2193 | (errval = reiserfs_xattr_init(sb: s, mount_flags: s->s_flags))) { |
2194 | dput(s->s_root); |
2195 | s->s_root = NULL; |
2196 | goto error_unlocked; |
2197 | } |
2198 | reiserfs_write_lock(s); |
2199 | } |
2200 | /* |
2201 | * mark hash in super block: it could be unset. overwrite should be ok |
2202 | */ |
2203 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); |
2204 | |
2205 | handle_attrs(s); |
2206 | |
2207 | reiserfs_proc_info_init(sb: s); |
2208 | |
2209 | init_waitqueue_head(&(sbi->s_wait)); |
2210 | spin_lock_init(&sbi->bitmap_lock); |
2211 | |
2212 | reiserfs_write_unlock(s); |
2213 | |
2214 | return (0); |
2215 | |
2216 | error: |
2217 | reiserfs_write_unlock(s); |
2218 | |
2219 | error_unlocked: |
2220 | /* kill the commit thread, free journal ram */ |
2221 | if (jinit_done) { |
2222 | reiserfs_write_lock(s); |
2223 | journal_release_error(NULL, s); |
2224 | reiserfs_write_unlock(s); |
2225 | } |
2226 | |
2227 | if (sbi->commit_wq) |
2228 | destroy_workqueue(wq: sbi->commit_wq); |
2229 | |
2230 | reiserfs_cancel_old_flush(s); |
2231 | |
2232 | reiserfs_free_bitmap_cache(sb: s); |
2233 | if (SB_BUFFER_WITH_SB(s)) |
2234 | brelse(SB_BUFFER_WITH_SB(s)); |
2235 | #ifdef CONFIG_QUOTA |
2236 | { |
2237 | int j; |
2238 | for (j = 0; j < REISERFS_MAXQUOTAS; j++) |
2239 | kfree(objp: qf_names[j]); |
2240 | } |
2241 | #endif |
2242 | kfree(objp: sbi->s_jdev); |
2243 | kfree(objp: sbi); |
2244 | |
2245 | s->s_fs_info = NULL; |
2246 | return errval; |
2247 | } |
2248 | |
2249 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
2250 | { |
2251 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
2252 | |
2253 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); |
2254 | buf->f_bfree = sb_free_blocks(rs); |
2255 | buf->f_bavail = buf->f_bfree; |
2256 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; |
2257 | buf->f_bsize = dentry->d_sb->s_blocksize; |
2258 | /* changed to accommodate gcc folks. */ |
2259 | buf->f_type = REISERFS_SUPER_MAGIC; |
2260 | buf->f_fsid.val[0] = (u32)crc32_le(crc: 0, p: rs->s_uuid, len: sizeof(rs->s_uuid)/2); |
2261 | buf->f_fsid.val[1] = (u32)crc32_le(crc: 0, p: rs->s_uuid + sizeof(rs->s_uuid)/2, |
2262 | len: sizeof(rs->s_uuid)/2); |
2263 | |
2264 | return 0; |
2265 | } |
2266 | |
2267 | #ifdef CONFIG_QUOTA |
2268 | static int reiserfs_write_dquot(struct dquot *dquot) |
2269 | { |
2270 | struct reiserfs_transaction_handle th; |
2271 | int ret, err; |
2272 | int depth; |
2273 | |
2274 | reiserfs_write_lock(s: dquot->dq_sb); |
2275 | ret = |
2276 | journal_begin(&th, sb: dquot->dq_sb, |
2277 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
2278 | if (ret) |
2279 | goto out; |
2280 | depth = reiserfs_write_unlock_nested(s: dquot->dq_sb); |
2281 | ret = dquot_commit(dquot); |
2282 | reiserfs_write_lock_nested(s: dquot->dq_sb, depth); |
2283 | err = journal_end(&th); |
2284 | if (!ret && err) |
2285 | ret = err; |
2286 | out: |
2287 | reiserfs_write_unlock(s: dquot->dq_sb); |
2288 | return ret; |
2289 | } |
2290 | |
2291 | static int reiserfs_acquire_dquot(struct dquot *dquot) |
2292 | { |
2293 | struct reiserfs_transaction_handle th; |
2294 | int ret, err; |
2295 | int depth; |
2296 | |
2297 | reiserfs_write_lock(s: dquot->dq_sb); |
2298 | ret = |
2299 | journal_begin(&th, sb: dquot->dq_sb, |
2300 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
2301 | if (ret) |
2302 | goto out; |
2303 | depth = reiserfs_write_unlock_nested(s: dquot->dq_sb); |
2304 | ret = dquot_acquire(dquot); |
2305 | reiserfs_write_lock_nested(s: dquot->dq_sb, depth); |
2306 | err = journal_end(&th); |
2307 | if (!ret && err) |
2308 | ret = err; |
2309 | out: |
2310 | reiserfs_write_unlock(s: dquot->dq_sb); |
2311 | return ret; |
2312 | } |
2313 | |
2314 | static int reiserfs_release_dquot(struct dquot *dquot) |
2315 | { |
2316 | struct reiserfs_transaction_handle th; |
2317 | int ret, err; |
2318 | |
2319 | reiserfs_write_lock(s: dquot->dq_sb); |
2320 | ret = |
2321 | journal_begin(&th, sb: dquot->dq_sb, |
2322 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
2323 | reiserfs_write_unlock(s: dquot->dq_sb); |
2324 | if (ret) { |
2325 | /* Release dquot anyway to avoid endless cycle in dqput() */ |
2326 | dquot_release(dquot); |
2327 | goto out; |
2328 | } |
2329 | ret = dquot_release(dquot); |
2330 | reiserfs_write_lock(s: dquot->dq_sb); |
2331 | err = journal_end(&th); |
2332 | if (!ret && err) |
2333 | ret = err; |
2334 | reiserfs_write_unlock(s: dquot->dq_sb); |
2335 | out: |
2336 | return ret; |
2337 | } |
2338 | |
2339 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) |
2340 | { |
2341 | /* Are we journaling quotas? */ |
2342 | if (REISERFS_SB(sb: dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2343 | REISERFS_SB(sb: dquot->dq_sb)->s_qf_names[GRPQUOTA]) { |
2344 | dquot_mark_dquot_dirty(dquot); |
2345 | return reiserfs_write_dquot(dquot); |
2346 | } else |
2347 | return dquot_mark_dquot_dirty(dquot); |
2348 | } |
2349 | |
2350 | static int reiserfs_write_info(struct super_block *sb, int type) |
2351 | { |
2352 | struct reiserfs_transaction_handle th; |
2353 | int ret, err; |
2354 | int depth; |
2355 | |
2356 | /* Data block + inode block */ |
2357 | reiserfs_write_lock(s: sb); |
2358 | ret = journal_begin(&th, sb, 2); |
2359 | if (ret) |
2360 | goto out; |
2361 | depth = reiserfs_write_unlock_nested(s: sb); |
2362 | ret = dquot_commit_info(sb, type); |
2363 | reiserfs_write_lock_nested(s: sb, depth); |
2364 | err = journal_end(&th); |
2365 | if (!ret && err) |
2366 | ret = err; |
2367 | out: |
2368 | reiserfs_write_unlock(s: sb); |
2369 | return ret; |
2370 | } |
2371 | |
2372 | /* |
2373 | * Turn on quotas during mount time - we need to find the quota file and such... |
2374 | */ |
2375 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) |
2376 | { |
2377 | return dquot_quota_on_mount(sb, qf_name: REISERFS_SB(sb)->s_qf_names[type], |
2378 | format_id: REISERFS_SB(sb)->s_jquota_fmt, type); |
2379 | } |
2380 | |
2381 | /* |
2382 | * Standard function to be called on quota_on |
2383 | */ |
2384 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
2385 | const struct path *path) |
2386 | { |
2387 | int err; |
2388 | struct inode *inode; |
2389 | struct reiserfs_transaction_handle th; |
2390 | int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; |
2391 | |
2392 | reiserfs_write_lock(s: sb); |
2393 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { |
2394 | err = -EINVAL; |
2395 | goto out; |
2396 | } |
2397 | |
2398 | /* Quotafile not on the same filesystem? */ |
2399 | if (path->dentry->d_sb != sb) { |
2400 | err = -EXDEV; |
2401 | goto out; |
2402 | } |
2403 | inode = d_inode(dentry: path->dentry); |
2404 | /* |
2405 | * We must not pack tails for quota files on reiserfs for quota |
2406 | * IO to work |
2407 | */ |
2408 | if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
2409 | err = reiserfs_unpack(inode); |
2410 | if (err) { |
2411 | reiserfs_warning(sb, "super-6520" , |
2412 | "Unpacking tail of quota file failed" |
2413 | " (%d). Cannot turn on quotas." , err); |
2414 | err = -EINVAL; |
2415 | goto out; |
2416 | } |
2417 | mark_inode_dirty(inode); |
2418 | } |
2419 | /* Journaling quota? */ |
2420 | if (REISERFS_SB(sb)->s_qf_names[type]) { |
2421 | /* Quotafile not of fs root? */ |
2422 | if (path->dentry->d_parent != sb->s_root) |
2423 | reiserfs_warning(sb, "super-6521" , |
2424 | "Quota file not on filesystem root. " |
2425 | "Journalled quota will not work." ); |
2426 | } |
2427 | |
2428 | /* |
2429 | * When we journal data on quota file, we have to flush journal to see |
2430 | * all updates to the file when we bypass pagecache... |
2431 | */ |
2432 | if (reiserfs_file_data_log(inode)) { |
2433 | /* Just start temporary transaction and finish it */ |
2434 | err = journal_begin(&th, sb, 1); |
2435 | if (err) |
2436 | goto out; |
2437 | err = journal_end_sync(&th); |
2438 | if (err) |
2439 | goto out; |
2440 | } |
2441 | reiserfs_write_unlock(s: sb); |
2442 | err = dquot_quota_on(sb, type, format_id, path); |
2443 | if (!err) { |
2444 | inode_lock(inode); |
2445 | REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL | |
2446 | REISERFS_NOATIME_FL; |
2447 | inode_set_flags(inode, S_IMMUTABLE | S_NOATIME, |
2448 | S_IMMUTABLE | S_NOATIME); |
2449 | inode_unlock(inode); |
2450 | mark_inode_dirty(inode); |
2451 | } |
2452 | return err; |
2453 | out: |
2454 | reiserfs_write_unlock(s: sb); |
2455 | return err; |
2456 | } |
2457 | |
2458 | static int reiserfs_quota_off(struct super_block *sb, int type) |
2459 | { |
2460 | int err; |
2461 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2462 | |
2463 | if (!inode || !igrab(inode)) |
2464 | goto out; |
2465 | |
2466 | err = dquot_quota_off(sb, type); |
2467 | if (err) |
2468 | goto out_put; |
2469 | |
2470 | inode_lock(inode); |
2471 | REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL | |
2472 | REISERFS_NOATIME_FL); |
2473 | inode_set_flags(inode, flags: 0, S_IMMUTABLE | S_NOATIME); |
2474 | inode_unlock(inode); |
2475 | mark_inode_dirty(inode); |
2476 | out_put: |
2477 | iput(inode); |
2478 | return err; |
2479 | out: |
2480 | return dquot_quota_off(sb, type); |
2481 | } |
2482 | |
2483 | /* |
2484 | * Read data from quotafile - avoid pagecache and such because we cannot afford |
2485 | * acquiring the locks... As quota files are never truncated and quota code |
2486 | * itself serializes the operations (and no one else should touch the files) |
2487 | * we don't have to be afraid of races |
2488 | */ |
2489 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, |
2490 | size_t len, loff_t off) |
2491 | { |
2492 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2493 | unsigned long blk = off >> sb->s_blocksize_bits; |
2494 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; |
2495 | size_t toread; |
2496 | struct buffer_head tmp_bh, *bh; |
2497 | loff_t i_size = i_size_read(inode); |
2498 | |
2499 | if (off > i_size) |
2500 | return 0; |
2501 | if (off + len > i_size) |
2502 | len = i_size - off; |
2503 | toread = len; |
2504 | while (toread > 0) { |
2505 | tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); |
2506 | tmp_bh.b_state = 0; |
2507 | /* |
2508 | * Quota files are without tails so we can safely |
2509 | * use this function |
2510 | */ |
2511 | reiserfs_write_lock(s: sb); |
2512 | err = reiserfs_get_block(inode, block: blk, bh_result: &tmp_bh, create: 0); |
2513 | reiserfs_write_unlock(s: sb); |
2514 | if (err) |
2515 | return err; |
2516 | if (!buffer_mapped(bh: &tmp_bh)) /* A hole? */ |
2517 | memset(data, 0, tocopy); |
2518 | else { |
2519 | bh = sb_bread(sb, block: tmp_bh.b_blocknr); |
2520 | if (!bh) |
2521 | return -EIO; |
2522 | memcpy(data, bh->b_data + offset, tocopy); |
2523 | brelse(bh); |
2524 | } |
2525 | offset = 0; |
2526 | toread -= tocopy; |
2527 | data += tocopy; |
2528 | blk++; |
2529 | } |
2530 | return len; |
2531 | } |
2532 | |
2533 | /* |
2534 | * Write to quotafile (we know the transaction is already started and has |
2535 | * enough credits) |
2536 | */ |
2537 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, |
2538 | const char *data, size_t len, loff_t off) |
2539 | { |
2540 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2541 | unsigned long blk = off >> sb->s_blocksize_bits; |
2542 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; |
2543 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; |
2544 | size_t towrite = len; |
2545 | struct buffer_head tmp_bh, *bh; |
2546 | |
2547 | if (!current->journal_info) { |
2548 | printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n" , |
2549 | (unsigned long long)off, (unsigned long long)len); |
2550 | return -EIO; |
2551 | } |
2552 | while (towrite > 0) { |
2553 | tocopy = min_t(unsigned long, sb->s_blocksize - offset, towrite); |
2554 | tmp_bh.b_state = 0; |
2555 | reiserfs_write_lock(s: sb); |
2556 | err = reiserfs_get_block(inode, block: blk, bh_result: &tmp_bh, GET_BLOCK_CREATE); |
2557 | reiserfs_write_unlock(s: sb); |
2558 | if (err) |
2559 | goto out; |
2560 | if (offset || tocopy != sb->s_blocksize) |
2561 | bh = sb_bread(sb, block: tmp_bh.b_blocknr); |
2562 | else |
2563 | bh = sb_getblk(sb, block: tmp_bh.b_blocknr); |
2564 | if (!bh) { |
2565 | err = -EIO; |
2566 | goto out; |
2567 | } |
2568 | lock_buffer(bh); |
2569 | memcpy(bh->b_data + offset, data, tocopy); |
2570 | flush_dcache_page(page: bh->b_page); |
2571 | set_buffer_uptodate(bh); |
2572 | unlock_buffer(bh); |
2573 | reiserfs_write_lock(s: sb); |
2574 | reiserfs_prepare_for_journal(sb, bh, wait: 1); |
2575 | journal_mark_dirty(current->journal_info, bh); |
2576 | if (!journal_quota) |
2577 | reiserfs_add_ordered_list(inode, bh); |
2578 | reiserfs_write_unlock(s: sb); |
2579 | brelse(bh); |
2580 | offset = 0; |
2581 | towrite -= tocopy; |
2582 | data += tocopy; |
2583 | blk++; |
2584 | } |
2585 | out: |
2586 | if (len == towrite) |
2587 | return err; |
2588 | if (inode->i_size < off + len - towrite) |
2589 | i_size_write(inode, i_size: off + len - towrite); |
2590 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
2591 | mark_inode_dirty(inode); |
2592 | return len - towrite; |
2593 | } |
2594 | |
2595 | #endif |
2596 | |
2597 | static struct dentry *get_super_block(struct file_system_type *fs_type, |
2598 | int flags, const char *dev_name, |
2599 | void *data) |
2600 | { |
2601 | return mount_bdev(fs_type, flags, dev_name, data, fill_super: reiserfs_fill_super); |
2602 | } |
2603 | |
2604 | static int __init init_reiserfs_fs(void) |
2605 | { |
2606 | int ret; |
2607 | |
2608 | ret = init_inodecache(); |
2609 | if (ret) |
2610 | return ret; |
2611 | |
2612 | reiserfs_proc_info_global_init(); |
2613 | |
2614 | ret = register_filesystem(&reiserfs_fs_type); |
2615 | if (ret) |
2616 | goto out; |
2617 | |
2618 | return 0; |
2619 | out: |
2620 | reiserfs_proc_info_global_done(); |
2621 | destroy_inodecache(); |
2622 | |
2623 | return ret; |
2624 | } |
2625 | |
2626 | static void __exit exit_reiserfs_fs(void) |
2627 | { |
2628 | reiserfs_proc_info_global_done(); |
2629 | unregister_filesystem(&reiserfs_fs_type); |
2630 | destroy_inodecache(); |
2631 | } |
2632 | |
2633 | struct file_system_type reiserfs_fs_type = { |
2634 | .owner = THIS_MODULE, |
2635 | .name = "reiserfs" , |
2636 | .mount = get_super_block, |
2637 | .kill_sb = reiserfs_kill_sb, |
2638 | .fs_flags = FS_REQUIRES_DEV, |
2639 | }; |
2640 | MODULE_ALIAS_FS("reiserfs" ); |
2641 | |
2642 | MODULE_DESCRIPTION("ReiserFS journaled filesystem" ); |
2643 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>" ); |
2644 | MODULE_LICENSE("GPL" ); |
2645 | |
2646 | module_init(init_reiserfs_fs); |
2647 | module_exit(exit_reiserfs_fs); |
2648 | |