Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
1da177e4 | 14 | #include <linux/module.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
1da177e4 LT |
16 | #include <linux/vmalloc.h> |
17 | #include <linux/time.h> | |
17093991 | 18 | #include <linux/uaccess.h> |
f466c6fd | 19 | #include "reiserfs.h" |
a3063ab8 | 20 | #include "acl.h" |
c45ac888 | 21 | #include "xattr.h" |
1da177e4 LT |
22 | #include <linux/init.h> |
23 | #include <linux/blkdev.h> | |
66114cad | 24 | #include <linux/backing-dev.h> |
1da177e4 | 25 | #include <linux/buffer_head.h> |
a5694255 | 26 | #include <linux/exportfs.h> |
74abb989 | 27 | #include <linux/quotaops.h> |
1da177e4 | 28 | #include <linux/vfs.h> |
1da177e4 LT |
29 | #include <linux/mount.h> |
30 | #include <linux/namei.h> | |
651d0623 | 31 | #include <linux/crc32.h> |
c3aa0776 | 32 | #include <linux/seq_file.h> |
1da177e4 LT |
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 | ||
bd4c625c | 40 | int is_reiserfs_3_5(struct reiserfs_super_block *rs) |
1da177e4 | 41 | { |
bd4c625c LT |
42 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, |
43 | strlen(reiserfs_3_5_magic_string)); | |
1da177e4 LT |
44 | } |
45 | ||
bd4c625c | 46 | int is_reiserfs_3_6(struct reiserfs_super_block *rs) |
1da177e4 | 47 | { |
bd4c625c LT |
48 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, |
49 | strlen(reiserfs_3_6_magic_string)); | |
1da177e4 LT |
50 | } |
51 | ||
bd4c625c | 52 | int is_reiserfs_jr(struct reiserfs_super_block *rs) |
1da177e4 | 53 | { |
bd4c625c LT |
54 | return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, |
55 | strlen(reiserfs_jr_magic_string)); | |
1da177e4 LT |
56 | } |
57 | ||
bd4c625c | 58 | static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) |
1da177e4 | 59 | { |
bd4c625c LT |
60 | return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || |
61 | is_reiserfs_jr(rs)); | |
1da177e4 LT |
62 | } |
63 | ||
bd4c625c | 64 | static int reiserfs_remount(struct super_block *s, int *flags, char *data); |
726c3342 | 65 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); |
1da177e4 | 66 | |
bd4c625c | 67 | static int reiserfs_sync_fs(struct super_block *s, int wait) |
1da177e4 | 68 | { |
5af7926f CH |
69 | struct reiserfs_transaction_handle th; |
70 | ||
a1177825 JK |
71 | /* |
72 | * Writeback quota in non-journalled quota case - journalled quota has | |
73 | * no dirty dquots | |
74 | */ | |
75 | dquot_writeback_dquots(s, -1); | |
5af7926f CH |
76 | reiserfs_write_lock(s); |
77 | if (!journal_begin(&th, s, 1)) | |
58d85426 | 78 | if (!journal_end_sync(&th)) |
5af7926f | 79 | reiserfs_flush_old_commits(s); |
5af7926f | 80 | reiserfs_write_unlock(s); |
bd4c625c | 81 | return 0; |
1da177e4 LT |
82 | } |
83 | ||
033369d1 | 84 | static void flush_old_commits(struct work_struct *work) |
1da177e4 | 85 | { |
033369d1 AB |
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 | spin_lock(&sbi->old_work_lock); | |
93 | sbi->work_queued = 0; | |
94 | spin_unlock(&sbi->old_work_lock); | |
95 | ||
bd4c625c | 96 | reiserfs_sync_fs(s, 1); |
1da177e4 LT |
97 | } |
98 | ||
033369d1 AB |
99 | void reiserfs_schedule_old_flush(struct super_block *s) |
100 | { | |
101 | struct reiserfs_sb_info *sbi = REISERFS_SB(s); | |
102 | unsigned long delay; | |
103 | ||
01777836 JK |
104 | /* |
105 | * Avoid scheduling flush when sb is being shut down. It can race | |
106 | * with journal shutdown and free still queued delayed work. | |
107 | */ | |
108 | if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE)) | |
033369d1 AB |
109 | return; |
110 | ||
111 | spin_lock(&sbi->old_work_lock); | |
112 | if (!sbi->work_queued) { | |
113 | delay = msecs_to_jiffies(dirty_writeback_interval * 10); | |
114 | queue_delayed_work(system_long_wq, &sbi->old_work, delay); | |
115 | sbi->work_queued = 1; | |
116 | } | |
117 | spin_unlock(&sbi->old_work_lock); | |
118 | } | |
119 | ||
120 | static void cancel_old_flush(struct super_block *s) | |
121 | { | |
122 | struct reiserfs_sb_info *sbi = REISERFS_SB(s); | |
123 | ||
124 | cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); | |
125 | spin_lock(&sbi->old_work_lock); | |
126 | sbi->work_queued = 0; | |
127 | spin_unlock(&sbi->old_work_lock); | |
128 | } | |
129 | ||
c4be0c1d | 130 | static int reiserfs_freeze(struct super_block *s) |
1da177e4 | 131 | { |
bd4c625c | 132 | struct reiserfs_transaction_handle th; |
033369d1 AB |
133 | |
134 | cancel_old_flush(s); | |
135 | ||
bd4c625c LT |
136 | reiserfs_write_lock(s); |
137 | if (!(s->s_flags & MS_RDONLY)) { | |
138 | int err = journal_begin(&th, s, 1); | |
139 | if (err) { | |
140 | reiserfs_block_writes(&th); | |
141 | } else { | |
142 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
143 | 1); | |
09f1b80b | 144 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
bd4c625c | 145 | reiserfs_block_writes(&th); |
58d85426 | 146 | journal_end_sync(&th); |
bd4c625c LT |
147 | } |
148 | } | |
bd4c625c | 149 | reiserfs_write_unlock(s); |
c4be0c1d | 150 | return 0; |
1da177e4 LT |
151 | } |
152 | ||
c4be0c1d | 153 | static int reiserfs_unfreeze(struct super_block *s) |
bd4c625c LT |
154 | { |
155 | reiserfs_allow_writes(s); | |
c4be0c1d | 156 | return 0; |
1da177e4 LT |
157 | } |
158 | ||
bd4c625c | 159 | extern const struct in_core_key MAX_IN_CORE_KEY; |
1da177e4 | 160 | |
098297b2 JM |
161 | /* |
162 | * this is used to delete "save link" when there are no items of a | |
163 | * file it points to. It can either happen if unlink is completed but | |
164 | * "save unlink" removal, or if file has both unlink and truncate | |
165 | * pending and as unlink completes first (because key of "save link" | |
166 | * protecting unlink is bigger that a key lf "save link" which | |
167 | * protects truncate), so there left no items to make truncate | |
168 | * completion on | |
169 | */ | |
bd4c625c LT |
170 | static int remove_save_link_only(struct super_block *s, |
171 | struct reiserfs_key *key, int oid_free) | |
1da177e4 | 172 | { |
bd4c625c LT |
173 | struct reiserfs_transaction_handle th; |
174 | int err; | |
175 | ||
176 | /* we are going to do one balancing */ | |
177 | err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); | |
178 | if (err) | |
179 | return err; | |
180 | ||
181 | reiserfs_delete_solid_item(&th, NULL, key); | |
182 | if (oid_free) | |
183 | /* removals are protected by direct items */ | |
184 | reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); | |
185 | ||
58d85426 | 186 | return journal_end(&th); |
1da177e4 | 187 | } |
bd4c625c | 188 | |
1da177e4 LT |
189 | #ifdef CONFIG_QUOTA |
190 | static int reiserfs_quota_on_mount(struct super_block *, int); | |
191 | #endif | |
bd4c625c | 192 | |
420902c9 MG |
193 | /* |
194 | * Look for uncompleted unlinks and truncates and complete them | |
195 | * | |
196 | * Called with superblock write locked. If quotas are enabled, we have to | |
197 | * release/retake lest we call dquot_quota_on_mount(), proceed to | |
198 | * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per | |
199 | * cpu worklets to complete flush_async_commits() that in turn wait for the | |
200 | * superblock write lock. | |
201 | */ | |
bd4c625c | 202 | static int finish_unfinished(struct super_block *s) |
1da177e4 | 203 | { |
bd4c625c LT |
204 | INITIALIZE_PATH(path); |
205 | struct cpu_key max_cpu_key, obj_key; | |
fb46f341 | 206 | struct reiserfs_key save_link_key, last_inode_key; |
bd4c625c LT |
207 | int retval = 0; |
208 | struct item_head *ih; | |
209 | struct buffer_head *bh; | |
210 | int item_pos; | |
211 | char *item; | |
212 | int done; | |
213 | struct inode *inode; | |
214 | int truncate; | |
1da177e4 | 215 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
216 | int i; |
217 | int ms_active_set; | |
aca60617 | 218 | int quota_enabled[REISERFS_MAXQUOTAS]; |
1da177e4 | 219 | #endif |
bd4c625c LT |
220 | |
221 | /* compose key to look for "save" links */ | |
222 | max_cpu_key.version = KEY_FORMAT_3_5; | |
223 | max_cpu_key.on_disk_key.k_dir_id = ~0U; | |
224 | max_cpu_key.on_disk_key.k_objectid = ~0U; | |
225 | set_cpu_key_k_offset(&max_cpu_key, ~0U); | |
226 | max_cpu_key.key_length = 3; | |
1da177e4 | 227 | |
fb46f341 LW |
228 | memset(&last_inode_key, 0, sizeof(last_inode_key)); |
229 | ||
1da177e4 | 230 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
231 | /* Needed for iput() to work correctly and not trash data */ |
232 | if (s->s_flags & MS_ACTIVE) { | |
233 | ms_active_set = 0; | |
234 | } else { | |
235 | ms_active_set = 1; | |
236 | s->s_flags |= MS_ACTIVE; | |
237 | } | |
238 | /* Turn on quotas so that they are updated correctly */ | |
aca60617 | 239 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
f4b113ae | 240 | quota_enabled[i] = 1; |
bd4c625c | 241 | if (REISERFS_SB(s)->s_qf_names[i]) { |
f4b113ae JK |
242 | int ret; |
243 | ||
244 | if (sb_has_quota_active(s, i)) { | |
245 | quota_enabled[i] = 0; | |
246 | continue; | |
247 | } | |
420902c9 | 248 | reiserfs_write_unlock(s); |
f4b113ae | 249 | ret = reiserfs_quota_on_mount(s, i); |
420902c9 | 250 | reiserfs_write_lock(s); |
bd4c625c | 251 | if (ret < 0) |
45b03d5e JM |
252 | reiserfs_warning(s, "reiserfs-2500", |
253 | "cannot turn on journaled " | |
254 | "quota: error %d", ret); | |
bd4c625c LT |
255 | } |
256 | } | |
1da177e4 | 257 | #endif |
bd4c625c LT |
258 | |
259 | done = 0; | |
260 | REISERFS_SB(s)->s_is_unlinked_ok = 1; | |
261 | while (!retval) { | |
d2d0395f | 262 | int depth; |
bd4c625c LT |
263 | retval = search_item(s, &max_cpu_key, &path); |
264 | if (retval != ITEM_NOT_FOUND) { | |
0030b645 JM |
265 | reiserfs_error(s, "vs-2140", |
266 | "search_by_key returned %d", retval); | |
bd4c625c LT |
267 | break; |
268 | } | |
269 | ||
270 | bh = get_last_bh(&path); | |
271 | item_pos = get_item_pos(&path); | |
272 | if (item_pos != B_NR_ITEMS(bh)) { | |
45b03d5e JM |
273 | reiserfs_warning(s, "vs-2060", |
274 | "wrong position found"); | |
bd4c625c LT |
275 | break; |
276 | } | |
277 | item_pos--; | |
4cf5f7ad | 278 | ih = item_head(bh, item_pos); |
bd4c625c LT |
279 | |
280 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) | |
281 | /* there are no "save" links anymore */ | |
282 | break; | |
283 | ||
284 | save_link_key = ih->ih_key; | |
285 | if (is_indirect_le_ih(ih)) | |
286 | truncate = 1; | |
287 | else | |
288 | truncate = 0; | |
289 | ||
290 | /* reiserfs_iget needs k_dirid and k_objectid only */ | |
4cf5f7ad | 291 | item = ih_item_body(bh, ih); |
bd4c625c LT |
292 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); |
293 | obj_key.on_disk_key.k_objectid = | |
294 | le32_to_cpu(ih->ih_key.k_objectid); | |
295 | obj_key.on_disk_key.k_offset = 0; | |
296 | obj_key.on_disk_key.k_type = 0; | |
297 | ||
298 | pathrelse(&path); | |
299 | ||
300 | inode = reiserfs_iget(s, &obj_key); | |
ff7d080e | 301 | if (IS_ERR_OR_NULL(inode)) { |
098297b2 JM |
302 | /* |
303 | * the unlink almost completed, it just did not | |
304 | * manage to remove "save" link and release objectid | |
305 | */ | |
45b03d5e | 306 | reiserfs_warning(s, "vs-2180", "iget failed for %K", |
bd4c625c LT |
307 | &obj_key); |
308 | retval = remove_save_link_only(s, &save_link_key, 1); | |
309 | continue; | |
310 | } | |
311 | ||
312 | if (!truncate && inode->i_nlink) { | |
313 | /* file is not unlinked */ | |
45b03d5e JM |
314 | reiserfs_warning(s, "vs-2185", |
315 | "file %K is not unlinked", | |
bd4c625c LT |
316 | &obj_key); |
317 | retval = remove_save_link_only(s, &save_link_key, 0); | |
318 | continue; | |
319 | } | |
d2d0395f | 320 | depth = reiserfs_write_unlock_nested(inode->i_sb); |
871a2931 | 321 | dquot_initialize(inode); |
d2d0395f | 322 | reiserfs_write_lock_nested(inode->i_sb, depth); |
bd4c625c LT |
323 | |
324 | if (truncate && S_ISDIR(inode->i_mode)) { | |
098297b2 JM |
325 | /* |
326 | * We got a truncate request for a dir which | |
327 | * is impossible. The only imaginable way is to | |
328 | * execute unfinished truncate request then boot | |
329 | * into old kernel, remove the file and create dir | |
330 | * with the same key. | |
331 | */ | |
45b03d5e JM |
332 | reiserfs_warning(s, "green-2101", |
333 | "impossible truncate on a " | |
334 | "directory %k. Please report", | |
bd4c625c LT |
335 | INODE_PKEY(inode)); |
336 | retval = remove_save_link_only(s, &save_link_key, 0); | |
337 | truncate = 0; | |
338 | iput(inode); | |
339 | continue; | |
340 | } | |
341 | ||
342 | if (truncate) { | |
343 | REISERFS_I(inode)->i_flags |= | |
344 | i_link_saved_truncate_mask; | |
098297b2 JM |
345 | /* |
346 | * not completed truncate found. New size was | |
347 | * committed together with "save" link | |
348 | */ | |
53872ed0 | 349 | reiserfs_info(s, "Truncating %k to %lld ..", |
bd4c625c | 350 | INODE_PKEY(inode), inode->i_size); |
098297b2 JM |
351 | |
352 | /* don't update modification time */ | |
353 | reiserfs_truncate_file(inode, 0); | |
354 | ||
bd4c625c LT |
355 | retval = remove_save_link(inode, truncate); |
356 | } else { | |
357 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
358 | /* not completed unlink (rmdir) found */ | |
359 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); | |
fb46f341 LW |
360 | if (memcmp(&last_inode_key, INODE_PKEY(inode), |
361 | sizeof(last_inode_key))){ | |
362 | last_inode_key = *INODE_PKEY(inode); | |
363 | /* removal gets completed in iput */ | |
364 | retval = 0; | |
365 | } else { | |
45b03d5e JM |
366 | reiserfs_warning(s, "super-2189", "Dead loop " |
367 | "in finish_unfinished " | |
368 | "detected, just remove " | |
369 | "save link\n"); | |
fb46f341 LW |
370 | retval = remove_save_link_only(s, |
371 | &save_link_key, 0); | |
372 | } | |
bd4c625c LT |
373 | } |
374 | ||
375 | iput(inode); | |
376 | printk("done\n"); | |
377 | done++; | |
378 | } | |
379 | REISERFS_SB(s)->s_is_unlinked_ok = 0; | |
380 | ||
1da177e4 | 381 | #ifdef CONFIG_QUOTA |
bd4c625c | 382 | /* Turn quotas off */ |
d2d0395f | 383 | reiserfs_write_unlock(s); |
aca60617 | 384 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
f4b113ae | 385 | if (sb_dqopt(s)->files[i] && quota_enabled[i]) |
287a8095 | 386 | dquot_quota_off(s, i); |
bd4c625c | 387 | } |
d2d0395f | 388 | reiserfs_write_lock(s); |
bd4c625c LT |
389 | if (ms_active_set) |
390 | /* Restore the flag back */ | |
391 | s->s_flags &= ~MS_ACTIVE; | |
1da177e4 | 392 | #endif |
bd4c625c LT |
393 | pathrelse(&path); |
394 | if (done) | |
395 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " | |
396 | "Completed\n", done); | |
397 | return retval; | |
1da177e4 | 398 | } |
bd4c625c | 399 | |
098297b2 JM |
400 | /* |
401 | * to protect file being unlinked from getting lost we "safe" link files | |
402 | * being unlinked. This link will be deleted in the same transaction with last | |
403 | * item of file. mounting the filesystem we scan all these links and remove | |
404 | * files which almost got lost | |
405 | */ | |
bd4c625c LT |
406 | void add_save_link(struct reiserfs_transaction_handle *th, |
407 | struct inode *inode, int truncate) | |
1da177e4 | 408 | { |
bd4c625c LT |
409 | INITIALIZE_PATH(path); |
410 | int retval; | |
411 | struct cpu_key key; | |
412 | struct item_head ih; | |
413 | __le32 link; | |
414 | ||
415 | BUG_ON(!th->t_trans_id); | |
416 | ||
417 | /* file can only get one "save link" of each kind */ | |
418 | RFALSE(truncate && | |
419 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), | |
420 | "saved link already exists for truncated inode %lx", | |
421 | (long)inode->i_ino); | |
422 | RFALSE(!truncate && | |
423 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), | |
424 | "saved link already exists for unlinked inode %lx", | |
425 | (long)inode->i_ino); | |
426 | ||
427 | /* setup key of "save" link */ | |
428 | key.version = KEY_FORMAT_3_5; | |
429 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; | |
430 | key.on_disk_key.k_objectid = inode->i_ino; | |
431 | if (!truncate) { | |
432 | /* unlink, rmdir, rename */ | |
433 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); | |
434 | set_cpu_key_k_type(&key, TYPE_DIRECT); | |
435 | ||
436 | /* item head of "safe" link */ | |
437 | make_le_item_head(&ih, &key, key.version, | |
438 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, | |
439 | 4 /*length */ , 0xffff /*free space */ ); | |
440 | } else { | |
441 | /* truncate */ | |
442 | if (S_ISDIR(inode->i_mode)) | |
45b03d5e JM |
443 | reiserfs_warning(inode->i_sb, "green-2102", |
444 | "Adding a truncate savelink for " | |
445 | "a directory %k! Please report", | |
bd4c625c LT |
446 | INODE_PKEY(inode)); |
447 | set_cpu_key_k_offset(&key, 1); | |
448 | set_cpu_key_k_type(&key, TYPE_INDIRECT); | |
449 | ||
450 | /* item head of "safe" link */ | |
451 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, | |
452 | 4 /*length */ , 0 /*free space */ ); | |
453 | } | |
454 | key.key_length = 3; | |
455 | ||
456 | /* look for its place in the tree */ | |
457 | retval = search_item(inode->i_sb, &key, &path); | |
458 | if (retval != ITEM_NOT_FOUND) { | |
459 | if (retval != -ENOSPC) | |
0030b645 JM |
460 | reiserfs_error(inode->i_sb, "vs-2100", |
461 | "search_by_key (%K) returned %d", &key, | |
462 | retval); | |
bd4c625c LT |
463 | pathrelse(&path); |
464 | return; | |
465 | } | |
1da177e4 | 466 | |
bd4c625c LT |
467 | /* body of "save" link */ |
468 | link = INODE_PKEY(inode)->k_dir_id; | |
469 | ||
25985edc | 470 | /* put "save" link into tree, don't charge quota to anyone */ |
bd4c625c LT |
471 | retval = |
472 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); | |
473 | if (retval) { | |
474 | if (retval != -ENOSPC) | |
0030b645 JM |
475 | reiserfs_error(inode->i_sb, "vs-2120", |
476 | "insert_item returned %d", retval); | |
bd4c625c LT |
477 | } else { |
478 | if (truncate) | |
479 | REISERFS_I(inode)->i_flags |= | |
480 | i_link_saved_truncate_mask; | |
481 | else | |
482 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
483 | } | |
484 | } | |
1da177e4 LT |
485 | |
486 | /* this opens transaction unlike add_save_link */ | |
bd4c625c | 487 | int remove_save_link(struct inode *inode, int truncate) |
1da177e4 | 488 | { |
bd4c625c LT |
489 | struct reiserfs_transaction_handle th; |
490 | struct reiserfs_key key; | |
491 | int err; | |
492 | ||
493 | /* we are going to do one balancing only */ | |
494 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
495 | if (err) | |
496 | return err; | |
497 | ||
498 | /* setup key of "save" link */ | |
499 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); | |
500 | key.k_objectid = INODE_PKEY(inode)->k_objectid; | |
501 | if (!truncate) { | |
502 | /* unlink, rmdir, rename */ | |
503 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, | |
504 | 1 + inode->i_sb->s_blocksize); | |
505 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); | |
506 | } else { | |
507 | /* truncate */ | |
508 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); | |
509 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); | |
510 | } | |
1da177e4 | 511 | |
bd4c625c LT |
512 | if ((truncate && |
513 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || | |
514 | (!truncate && | |
515 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) | |
516 | /* don't take quota bytes from anywhere */ | |
517 | reiserfs_delete_solid_item(&th, NULL, &key); | |
518 | if (!truncate) { | |
519 | reiserfs_release_objectid(&th, inode->i_ino); | |
520 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; | |
521 | } else | |
522 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; | |
523 | ||
58d85426 | 524 | return journal_end(&th); |
bd4c625c | 525 | } |
1da177e4 | 526 | |
edc666e2 | 527 | static void reiserfs_kill_sb(struct super_block *s) |
1da177e4 | 528 | { |
edc666e2 | 529 | if (REISERFS_SB(s)) { |
672fe15d | 530 | reiserfs_proc_info_done(s); |
a9e36da6 JM |
531 | /* |
532 | * Force any pending inode evictions to occur now. Any | |
533 | * inodes to be removed that have extended attributes | |
534 | * associated with them need to clean them up before | |
535 | * we can release the extended attribute root dentries. | |
536 | * shrink_dcache_for_umount will BUG if we don't release | |
537 | * those before it's called so ->put_super is too late. | |
538 | */ | |
539 | shrink_dcache_sb(s); | |
540 | ||
541 | dput(REISERFS_SB(s)->xattr_root); | |
542 | REISERFS_SB(s)->xattr_root = NULL; | |
543 | dput(REISERFS_SB(s)->priv_root); | |
544 | REISERFS_SB(s)->priv_root = NULL; | |
bd4c625c LT |
545 | } |
546 | ||
edc666e2 DH |
547 | kill_block_super(s); |
548 | } | |
549 | ||
550 | static void reiserfs_put_super(struct super_block *s) | |
551 | { | |
552 | struct reiserfs_transaction_handle th; | |
553 | th.t_trans_id = 0; | |
bd4c625c | 554 | |
e0ccfd95 CH |
555 | dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
556 | ||
8ebc4232 | 557 | reiserfs_write_lock(s); |
6cfd0148 | 558 | |
098297b2 JM |
559 | /* |
560 | * change file system state to current state if it was mounted | |
561 | * with read-write permissions | |
562 | */ | |
bd4c625c LT |
563 | if (!(s->s_flags & MS_RDONLY)) { |
564 | if (!journal_begin(&th, s, 10)) { | |
565 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
566 | 1); | |
567 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), | |
568 | REISERFS_SB(s)->s_mount_state); | |
09f1b80b | 569 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
bd4c625c LT |
570 | } |
571 | } | |
572 | ||
098297b2 JM |
573 | /* |
574 | * note, journal_release checks for readonly mount, and can | |
575 | * decide not to do a journal_end | |
bd4c625c LT |
576 | */ |
577 | journal_release(&th, s); | |
578 | ||
5065227b | 579 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
580 | |
581 | brelse(SB_BUFFER_WITH_SB(s)); | |
582 | ||
583 | print_statistics(s); | |
584 | ||
bd4c625c | 585 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
45b03d5e | 586 | reiserfs_warning(s, "green-2005", "reserved blocks left %d", |
bd4c625c LT |
587 | REISERFS_SB(s)->reserved_blocks); |
588 | } | |
589 | ||
8ebc4232 FW |
590 | reiserfs_write_unlock(s); |
591 | mutex_destroy(&REISERFS_SB(s)->lock); | |
797d9016 | 592 | destroy_workqueue(REISERFS_SB(s)->commit_wq); |
bd4c625c LT |
593 | kfree(s->s_fs_info); |
594 | s->s_fs_info = NULL; | |
1da177e4 LT |
595 | } |
596 | ||
e18b890b | 597 | static struct kmem_cache *reiserfs_inode_cachep; |
1da177e4 LT |
598 | |
599 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) | |
600 | { | |
601 | struct reiserfs_inode_info *ei; | |
89bfae43 | 602 | ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
603 | if (!ei) |
604 | return NULL; | |
0e4f6a79 AV |
605 | atomic_set(&ei->openers, 0); |
606 | mutex_init(&ei->tailpack); | |
53873638 JK |
607 | #ifdef CONFIG_QUOTA |
608 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); | |
609 | #endif | |
610 | ||
1da177e4 LT |
611 | return &ei->vfs_inode; |
612 | } | |
613 | ||
fa0d7e3d | 614 | static void reiserfs_i_callback(struct rcu_head *head) |
1da177e4 | 615 | { |
fa0d7e3d | 616 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
617 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); |
618 | } | |
619 | ||
fa0d7e3d NP |
620 | static void reiserfs_destroy_inode(struct inode *inode) |
621 | { | |
622 | call_rcu(&inode->i_rcu, reiserfs_i_callback); | |
623 | } | |
624 | ||
51cc5068 | 625 | static void init_once(void *foo) |
1da177e4 | 626 | { |
bd4c625c | 627 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
1da177e4 | 628 | |
a35afb83 CL |
629 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
630 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 631 | } |
bd4c625c | 632 | |
31e14368 | 633 | static int __init init_inodecache(void) |
1da177e4 LT |
634 | { |
635 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", | |
bd4c625c LT |
636 | sizeof(struct |
637 | reiserfs_inode_info), | |
fffb60f9 | 638 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 VD |
639 | SLAB_MEM_SPREAD| |
640 | SLAB_ACCOUNT), | |
20c2df83 | 641 | init_once); |
1da177e4 LT |
642 | if (reiserfs_inode_cachep == NULL) |
643 | return -ENOMEM; | |
644 | return 0; | |
645 | } | |
646 | ||
647 | static void destroy_inodecache(void) | |
648 | { | |
8c0a8537 KS |
649 | /* |
650 | * Make sure all delayed rcu free inodes are flushed before we | |
651 | * destroy cache. | |
652 | */ | |
653 | rcu_barrier(); | |
1a1d92c1 | 654 | kmem_cache_destroy(reiserfs_inode_cachep); |
1da177e4 LT |
655 | } |
656 | ||
657 | /* we don't mark inodes dirty, we just log them */ | |
aa385729 | 658 | static void reiserfs_dirty_inode(struct inode *inode, int flags) |
bd4c625c LT |
659 | { |
660 | struct reiserfs_transaction_handle th; | |
661 | ||
662 | int err = 0; | |
dc8f6d89 | 663 | |
bd4c625c | 664 | if (inode->i_sb->s_flags & MS_RDONLY) { |
45b03d5e JM |
665 | reiserfs_warning(inode->i_sb, "clm-6006", |
666 | "writing inode %lu on readonly FS", | |
bd4c625c LT |
667 | inode->i_ino); |
668 | return; | |
669 | } | |
278f6679 | 670 | reiserfs_write_lock(inode->i_sb); |
bd4c625c | 671 | |
098297b2 JM |
672 | /* |
673 | * this is really only used for atime updates, so they don't have | |
674 | * to be included in O_SYNC or fsync | |
bd4c625c LT |
675 | */ |
676 | err = journal_begin(&th, inode->i_sb, 1); | |
dc8f6d89 FW |
677 | if (err) |
678 | goto out; | |
679 | ||
bd4c625c | 680 | reiserfs_update_sd(&th, inode); |
58d85426 | 681 | journal_end(&th); |
dc8f6d89 FW |
682 | |
683 | out: | |
278f6679 | 684 | reiserfs_write_unlock(inode->i_sb); |
1da177e4 LT |
685 | } |
686 | ||
c3aa0776 JK |
687 | static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) |
688 | { | |
689 | struct super_block *s = root->d_sb; | |
690 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
691 | long opts = REISERFS_SB(s)->s_mount_opt; | |
692 | ||
693 | if (opts & (1 << REISERFS_LARGETAIL)) | |
694 | seq_puts(seq, ",tails=on"); | |
695 | else if (!(opts & (1 << REISERFS_SMALLTAIL))) | |
696 | seq_puts(seq, ",notail"); | |
697 | /* tails=small is default so we don't show it */ | |
698 | ||
699 | if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) | |
700 | seq_puts(seq, ",barrier=none"); | |
701 | /* barrier=flush is default so we don't show it */ | |
702 | ||
703 | if (opts & (1 << REISERFS_ERROR_CONTINUE)) | |
704 | seq_puts(seq, ",errors=continue"); | |
705 | else if (opts & (1 << REISERFS_ERROR_PANIC)) | |
706 | seq_puts(seq, ",errors=panic"); | |
707 | /* errors=ro is default so we don't show it */ | |
708 | ||
709 | if (opts & (1 << REISERFS_DATA_LOG)) | |
710 | seq_puts(seq, ",data=journal"); | |
711 | else if (opts & (1 << REISERFS_DATA_WRITEBACK)) | |
712 | seq_puts(seq, ",data=writeback"); | |
713 | /* data=ordered is default so we don't show it */ | |
714 | ||
715 | if (opts & (1 << REISERFS_ATTRS)) | |
716 | seq_puts(seq, ",attrs"); | |
717 | ||
718 | if (opts & (1 << REISERFS_XATTRS_USER)) | |
719 | seq_puts(seq, ",user_xattr"); | |
720 | ||
721 | if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) | |
722 | seq_puts(seq, ",expose_privroot"); | |
723 | ||
724 | if (opts & (1 << REISERFS_POSIXACL)) | |
725 | seq_puts(seq, ",acl"); | |
726 | ||
727 | if (REISERFS_SB(s)->s_jdev) | |
a068acf2 | 728 | seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev); |
c3aa0776 JK |
729 | |
730 | if (journal->j_max_commit_age != journal->j_default_max_commit_age) | |
731 | seq_printf(seq, ",commit=%d", journal->j_max_commit_age); | |
732 | ||
733 | #ifdef CONFIG_QUOTA | |
734 | if (REISERFS_SB(s)->s_qf_names[USRQUOTA]) | |
a068acf2 KC |
735 | seq_show_option(seq, "usrjquota", |
736 | REISERFS_SB(s)->s_qf_names[USRQUOTA]); | |
c3aa0776 JK |
737 | else if (opts & (1 << REISERFS_USRQUOTA)) |
738 | seq_puts(seq, ",usrquota"); | |
739 | if (REISERFS_SB(s)->s_qf_names[GRPQUOTA]) | |
a068acf2 KC |
740 | seq_show_option(seq, "grpjquota", |
741 | REISERFS_SB(s)->s_qf_names[GRPQUOTA]); | |
c3aa0776 JK |
742 | else if (opts & (1 << REISERFS_GRPQUOTA)) |
743 | seq_puts(seq, ",grpquota"); | |
744 | if (REISERFS_SB(s)->s_jquota_fmt) { | |
745 | if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD) | |
746 | seq_puts(seq, ",jqfmt=vfsold"); | |
747 | else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0) | |
748 | seq_puts(seq, ",jqfmt=vfsv0"); | |
749 | } | |
750 | #endif | |
751 | ||
752 | /* Block allocator options */ | |
753 | if (opts & (1 << REISERFS_NO_BORDER)) | |
754 | seq_puts(seq, ",block-allocator=noborder"); | |
755 | if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) | |
756 | seq_puts(seq, ",block-allocator=no_unhashed_relocation"); | |
757 | if (opts & (1 << REISERFS_HASHED_RELOCATION)) | |
758 | seq_puts(seq, ",block-allocator=hashed_relocation"); | |
759 | if (opts & (1 << REISERFS_TEST4)) | |
760 | seq_puts(seq, ",block-allocator=test4"); | |
761 | show_alloc_options(seq, s); | |
762 | return 0; | |
763 | } | |
764 | ||
1da177e4 | 765 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
766 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
767 | size_t, loff_t); | |
768 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, | |
769 | loff_t); | |
53873638 JK |
770 | |
771 | static struct dquot **reiserfs_get_dquots(struct inode *inode) | |
772 | { | |
773 | return REISERFS_I(inode)->i_dquot; | |
774 | } | |
1da177e4 LT |
775 | #endif |
776 | ||
ee9b6d61 | 777 | static const struct super_operations reiserfs_sops = { |
bd4c625c LT |
778 | .alloc_inode = reiserfs_alloc_inode, |
779 | .destroy_inode = reiserfs_destroy_inode, | |
780 | .write_inode = reiserfs_write_inode, | |
781 | .dirty_inode = reiserfs_dirty_inode, | |
845a2cc0 | 782 | .evict_inode = reiserfs_evict_inode, |
bd4c625c | 783 | .put_super = reiserfs_put_super, |
bd4c625c | 784 | .sync_fs = reiserfs_sync_fs, |
c4be0c1d TS |
785 | .freeze_fs = reiserfs_freeze, |
786 | .unfreeze_fs = reiserfs_unfreeze, | |
bd4c625c LT |
787 | .statfs = reiserfs_statfs, |
788 | .remount_fs = reiserfs_remount, | |
c3aa0776 | 789 | .show_options = reiserfs_show_options, |
1da177e4 | 790 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
791 | .quota_read = reiserfs_quota_read, |
792 | .quota_write = reiserfs_quota_write, | |
53873638 | 793 | .get_dquots = reiserfs_get_dquots, |
1da177e4 LT |
794 | #endif |
795 | }; | |
796 | ||
797 | #ifdef CONFIG_QUOTA | |
798 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
799 | ||
1da177e4 LT |
800 | static int reiserfs_write_dquot(struct dquot *); |
801 | static int reiserfs_acquire_dquot(struct dquot *); | |
802 | static int reiserfs_release_dquot(struct dquot *); | |
803 | static int reiserfs_mark_dquot_dirty(struct dquot *); | |
804 | static int reiserfs_write_info(struct super_block *, int); | |
8c54ca9c | 805 | static int reiserfs_quota_on(struct super_block *, int, int, const struct path *); |
1da177e4 | 806 | |
61e225dc | 807 | static const struct dquot_operations reiserfs_quota_operations = { |
bd4c625c LT |
808 | .write_dquot = reiserfs_write_dquot, |
809 | .acquire_dquot = reiserfs_acquire_dquot, | |
810 | .release_dquot = reiserfs_release_dquot, | |
811 | .mark_dirty = reiserfs_mark_dquot_dirty, | |
812 | .write_info = reiserfs_write_info, | |
4103003b JK |
813 | .alloc_dquot = dquot_alloc, |
814 | .destroy_dquot = dquot_destroy, | |
be6257b2 | 815 | .get_next_id = dquot_get_next_id, |
1da177e4 LT |
816 | }; |
817 | ||
0d54b217 | 818 | static const struct quotactl_ops reiserfs_qctl_operations = { |
bd4c625c | 819 | .quota_on = reiserfs_quota_on, |
287a8095 CH |
820 | .quota_off = dquot_quota_off, |
821 | .quota_sync = dquot_quota_sync, | |
0a240339 | 822 | .get_state = dquot_get_state, |
287a8095 CH |
823 | .set_info = dquot_set_dqinfo, |
824 | .get_dqblk = dquot_get_dqblk, | |
825 | .set_dqblk = dquot_set_dqblk, | |
1da177e4 LT |
826 | }; |
827 | #endif | |
828 | ||
39655164 | 829 | static const struct export_operations reiserfs_export_ops = { |
bd4c625c | 830 | .encode_fh = reiserfs_encode_fh, |
be55caf1 CH |
831 | .fh_to_dentry = reiserfs_fh_to_dentry, |
832 | .fh_to_parent = reiserfs_fh_to_parent, | |
bd4c625c | 833 | .get_parent = reiserfs_get_parent, |
bd4c625c | 834 | }; |
1da177e4 | 835 | |
098297b2 JM |
836 | /* |
837 | * this struct is used in reiserfs_getopt () for containing the value for | |
838 | * those mount options that have values rather than being toggles. | |
839 | */ | |
1da177e4 | 840 | typedef struct { |
bd4c625c | 841 | char *value; |
098297b2 JM |
842 | /* |
843 | * bitmask which is to set on mount_options bitmask | |
844 | * when this value is found, 0 is no bits are to be changed. | |
845 | */ | |
846 | int setmask; | |
847 | /* | |
848 | * bitmask which is to clear on mount_options bitmask | |
849 | * when this value is found, 0 is no bits are to be changed. | |
850 | * This is applied BEFORE setmask | |
851 | */ | |
852 | int clrmask; | |
1da177e4 LT |
853 | } arg_desc_t; |
854 | ||
855 | /* Set this bit in arg_required to allow empty arguments */ | |
856 | #define REISERFS_OPT_ALLOWEMPTY 31 | |
857 | ||
098297b2 JM |
858 | /* |
859 | * this struct is used in reiserfs_getopt() for describing the | |
860 | * set of reiserfs mount options | |
861 | */ | |
1da177e4 | 862 | typedef struct { |
bd4c625c | 863 | char *option_name; |
098297b2 JM |
864 | |
865 | /* 0 if argument is not required, not 0 otherwise */ | |
866 | int arg_required; | |
867 | ||
868 | /* list of values accepted by an option */ | |
869 | const arg_desc_t *values; | |
870 | ||
871 | /* | |
872 | * bitmask which is to set on mount_options bitmask | |
873 | * when this value is found, 0 is no bits are to be changed. | |
874 | */ | |
875 | int setmask; | |
876 | ||
877 | /* | |
878 | * bitmask which is to clear on mount_options bitmask | |
879 | * when this value is found, 0 is no bits are to be changed. | |
880 | * This is applied BEFORE setmask | |
881 | */ | |
882 | int clrmask; | |
1da177e4 LT |
883 | } opt_desc_t; |
884 | ||
885 | /* possible values for -o data= */ | |
886 | static const arg_desc_t logging_mode[] = { | |
bd4c625c LT |
887 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
888 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, | |
889 | {"journal", 1 << REISERFS_DATA_LOG, | |
890 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, | |
891 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, | |
892 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, | |
cd02b966 | 893 | {.value = NULL} |
1da177e4 LT |
894 | }; |
895 | ||
896 | /* possible values for -o barrier= */ | |
897 | static const arg_desc_t barrier_mode[] = { | |
bd4c625c LT |
898 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
899 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, | |
cd02b966 | 900 | {.value = NULL} |
1da177e4 LT |
901 | }; |
902 | ||
098297b2 JM |
903 | /* |
904 | * possible values for "-o block-allocator=" and bits which are to be set in | |
905 | * s_mount_opt of reiserfs specific part of in-core super block | |
906 | */ | |
1da177e4 | 907 | static const arg_desc_t balloc[] = { |
bd4c625c LT |
908 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
909 | {"border", 0, 1 << REISERFS_NO_BORDER}, | |
910 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, | |
911 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, | |
912 | {"test4", 1 << REISERFS_TEST4, 0}, | |
913 | {"notest4", 0, 1 << REISERFS_TEST4}, | |
914 | {NULL, 0, 0} | |
1da177e4 LT |
915 | }; |
916 | ||
917 | static const arg_desc_t tails[] = { | |
bd4c625c LT |
918 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
919 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
920 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, | |
921 | {NULL, 0, 0} | |
1da177e4 LT |
922 | }; |
923 | ||
924 | static const arg_desc_t error_actions[] = { | |
bd4c625c LT |
925 | {"panic", 1 << REISERFS_ERROR_PANIC, |
926 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, | |
927 | {"ro-remount", 1 << REISERFS_ERROR_RO, | |
928 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, | |
1da177e4 | 929 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
bd4c625c LT |
930 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
931 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, | |
1da177e4 | 932 | #endif |
bd4c625c | 933 | {NULL, 0, 0}, |
1da177e4 LT |
934 | }; |
935 | ||
098297b2 JM |
936 | /* |
937 | * proceed only one option from a list *cur - string containing of mount | |
938 | * options | |
939 | * opts - array of options which are accepted | |
940 | * opt_arg - if option is found and requires an argument and if it is specifed | |
941 | * in the input - pointer to the argument is stored here | |
942 | * bit_flags - if option requires to set a certain bit - it is set here | |
943 | * return -1 if unknown option is found, opt->arg_required otherwise | |
944 | */ | |
bd4c625c LT |
945 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
946 | char **opt_arg, unsigned long *bit_flags) | |
1da177e4 | 947 | { |
bd4c625c | 948 | char *p; |
098297b2 JM |
949 | /* |
950 | * foo=bar, | |
951 | * ^ ^ ^ | |
952 | * | | +-- option_end | |
953 | * | +-- arg_start | |
954 | * +-- option_start | |
bd4c625c LT |
955 | */ |
956 | const opt_desc_t *opt; | |
957 | const arg_desc_t *arg; | |
958 | ||
959 | p = *cur; | |
960 | ||
961 | /* assume argument cannot contain commas */ | |
962 | *cur = strchr(p, ','); | |
963 | if (*cur) { | |
964 | *(*cur) = '\0'; | |
965 | (*cur)++; | |
966 | } | |
967 | ||
968 | if (!strncmp(p, "alloc=", 6)) { | |
098297b2 JM |
969 | /* |
970 | * Ugly special case, probably we should redo options | |
971 | * parser so that it can understand several arguments for | |
972 | * some options, also so that it can fill several bitfields | |
973 | * with option values. | |
974 | */ | |
bd4c625c LT |
975 | if (reiserfs_parse_alloc_options(s, p + 6)) { |
976 | return -1; | |
977 | } else { | |
978 | return 0; | |
979 | } | |
980 | } | |
981 | ||
982 | /* for every option in the list */ | |
983 | for (opt = opts; opt->option_name; opt++) { | |
984 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { | |
985 | if (bit_flags) { | |
986 | if (opt->clrmask == | |
987 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
988 | reiserfs_warning(s, "super-6500", |
989 | "%s not supported.\n", | |
bd4c625c LT |
990 | p); |
991 | else | |
992 | *bit_flags &= ~opt->clrmask; | |
993 | if (opt->setmask == | |
994 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
995 | reiserfs_warning(s, "super-6501", |
996 | "%s not supported.\n", | |
bd4c625c LT |
997 | p); |
998 | else | |
999 | *bit_flags |= opt->setmask; | |
1000 | } | |
1001 | break; | |
1002 | } | |
1003 | } | |
1004 | if (!opt->option_name) { | |
45b03d5e JM |
1005 | reiserfs_warning(s, "super-6502", |
1006 | "unknown mount option \"%s\"", p); | |
bd4c625c LT |
1007 | return -1; |
1008 | } | |
1009 | ||
1010 | p += strlen(opt->option_name); | |
1011 | switch (*p) { | |
1012 | case '=': | |
1013 | if (!opt->arg_required) { | |
45b03d5e JM |
1014 | reiserfs_warning(s, "super-6503", |
1015 | "the option \"%s\" does not " | |
1016 | "require an argument\n", | |
bd4c625c LT |
1017 | opt->option_name); |
1018 | return -1; | |
1019 | } | |
1020 | break; | |
1021 | ||
1022 | case 0: | |
1023 | if (opt->arg_required) { | |
45b03d5e JM |
1024 | reiserfs_warning(s, "super-6504", |
1025 | "the option \"%s\" requires an " | |
1026 | "argument\n", opt->option_name); | |
bd4c625c LT |
1027 | return -1; |
1028 | } | |
1029 | break; | |
1030 | default: | |
45b03d5e JM |
1031 | reiserfs_warning(s, "super-6505", |
1032 | "head of option \"%s\" is only correct\n", | |
bd4c625c LT |
1033 | opt->option_name); |
1034 | return -1; | |
1035 | } | |
1036 | ||
098297b2 JM |
1037 | /* |
1038 | * move to the argument, or to next option if argument is not | |
1039 | * required | |
1040 | */ | |
bd4c625c LT |
1041 | p++; |
1042 | ||
1043 | if (opt->arg_required | |
1044 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) | |
1045 | && !strlen(p)) { | |
1046 | /* this catches "option=," if not allowed */ | |
45b03d5e JM |
1047 | reiserfs_warning(s, "super-6506", |
1048 | "empty argument for \"%s\"\n", | |
bd4c625c LT |
1049 | opt->option_name); |
1050 | return -1; | |
1051 | } | |
1052 | ||
1053 | if (!opt->values) { | |
1054 | /* *=NULLopt_arg contains pointer to argument */ | |
1055 | *opt_arg = p; | |
1056 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); | |
1057 | } | |
1058 | ||
1059 | /* values possible for this option are listed in opt->values */ | |
1060 | for (arg = opt->values; arg->value; arg++) { | |
1061 | if (!strcmp(p, arg->value)) { | |
1062 | if (bit_flags) { | |
1063 | *bit_flags &= ~arg->clrmask; | |
1064 | *bit_flags |= arg->setmask; | |
1065 | } | |
1066 | return opt->arg_required; | |
1067 | } | |
1068 | } | |
1069 | ||
45b03d5e JM |
1070 | reiserfs_warning(s, "super-6506", |
1071 | "bad value \"%s\" for option \"%s\"\n", p, | |
bd4c625c | 1072 | opt->option_name); |
1da177e4 | 1073 | return -1; |
1da177e4 LT |
1074 | } |
1075 | ||
1076 | /* returns 0 if something is wrong in option string, 1 - otherwise */ | |
098297b2 JM |
1077 | static int reiserfs_parse_options(struct super_block *s, |
1078 | ||
1079 | /* string given via mount's -o */ | |
1080 | char *options, | |
1081 | ||
1082 | /* | |
1083 | * after the parsing phase, contains the | |
1084 | * collection of bitflags defining what | |
1085 | * mount options were selected. | |
1086 | */ | |
bd4c625c | 1087 | unsigned long *mount_options, |
098297b2 JM |
1088 | |
1089 | /* strtol-ed from NNN of resize=NNN */ | |
1090 | unsigned long *blocks, | |
bd4c625c | 1091 | char **jdev_name, |
00b44197 JK |
1092 | unsigned int *commit_max_age, |
1093 | char **qf_names, | |
1094 | unsigned int *qfmt) | |
1da177e4 | 1095 | { |
bd4c625c LT |
1096 | int c; |
1097 | char *arg = NULL; | |
1098 | char *pos; | |
1099 | opt_desc_t opts[] = { | |
098297b2 JM |
1100 | /* |
1101 | * Compatibility stuff, so that -o notail for old | |
1102 | * setups still work | |
1103 | */ | |
bd4c625c LT |
1104 | {"tails",.arg_required = 't',.values = tails}, |
1105 | {"notail",.clrmask = | |
1106 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
1107 | {"conv",.setmask = 1 << REISERFS_CONVERT}, | |
1108 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, | |
1109 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, | |
73422811 | 1110 | {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, |
1da177e4 | 1111 | #ifdef CONFIG_REISERFS_FS_XATTR |
bd4c625c LT |
1112 | {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
1113 | {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, | |
1da177e4 | 1114 | #else |
bd4c625c LT |
1115 | {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1116 | {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 LT |
1117 | #endif |
1118 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
bd4c625c LT |
1119 | {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
1120 | {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, | |
1da177e4 | 1121 | #else |
bd4c625c LT |
1122 | {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1123 | {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 | 1124 | #endif |
cd02b966 | 1125 | {.option_name = "nolog"}, |
bd4c625c LT |
1126 | {"replayonly",.setmask = 1 << REPLAYONLY}, |
1127 | {"block-allocator",.arg_required = 'a',.values = balloc}, | |
1128 | {"data",.arg_required = 'd',.values = logging_mode}, | |
1129 | {"barrier",.arg_required = 'b',.values = barrier_mode}, | |
1130 | {"resize",.arg_required = 'r',.values = NULL}, | |
1131 | {"jdev",.arg_required = 'j',.values = NULL}, | |
1132 | {"nolargeio",.arg_required = 'w',.values = NULL}, | |
1133 | {"commit",.arg_required = 'c',.values = NULL}, | |
c3aa0776 JK |
1134 | {"usrquota",.setmask = 1 << REISERFS_USRQUOTA}, |
1135 | {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA}, | |
1136 | {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, | |
bd4c625c LT |
1137 | {"errors",.arg_required = 'e',.values = error_actions}, |
1138 | {"usrjquota",.arg_required = | |
1139 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
1140 | {"grpjquota",.arg_required = | |
1141 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
1142 | {"jqfmt",.arg_required = 'f',.values = NULL}, | |
cd02b966 | 1143 | {.option_name = NULL} |
bd4c625c LT |
1144 | }; |
1145 | ||
1146 | *blocks = 0; | |
1147 | if (!options || !*options) | |
098297b2 JM |
1148 | /* |
1149 | * use default configuration: create tails, journaling on, no | |
1150 | * conversion to newest format | |
1151 | */ | |
bd4c625c LT |
1152 | return 1; |
1153 | ||
1154 | for (pos = options; pos;) { | |
1155 | c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); | |
1156 | if (c == -1) | |
1157 | /* wrong option is given */ | |
9a3bb301 | 1158 | return 0; |
1da177e4 | 1159 | |
bd4c625c LT |
1160 | if (c == 'r') { |
1161 | char *p; | |
1162 | ||
1163 | p = NULL; | |
1164 | /* "resize=NNN" or "resize=auto" */ | |
1165 | ||
1166 | if (!strcmp(arg, "auto")) { | |
1167 | /* From JFS code, to auto-get the size. */ | |
1168 | *blocks = | |
b899ba7d | 1169 | i_size_read(s->s_bdev->bd_inode) >> s-> |
bd4c625c LT |
1170 | s_blocksize_bits; |
1171 | } else { | |
1172 | *blocks = simple_strtoul(arg, &p, 0); | |
1173 | if (*p != '\0') { | |
1174 | /* NNN does not look like a number */ | |
45b03d5e JM |
1175 | reiserfs_warning(s, "super-6507", |
1176 | "bad value %s for " | |
1177 | "-oresize\n", arg); | |
bd4c625c LT |
1178 | return 0; |
1179 | } | |
1180 | } | |
1da177e4 | 1181 | } |
1da177e4 | 1182 | |
bd4c625c LT |
1183 | if (c == 'c') { |
1184 | char *p = NULL; | |
1185 | unsigned long val = simple_strtoul(arg, &p, 0); | |
1186 | /* commit=NNN (time in seconds) */ | |
1187 | if (*p != '\0' || val >= (unsigned int)-1) { | |
45b03d5e JM |
1188 | reiserfs_warning(s, "super-6508", |
1189 | "bad value %s for -ocommit\n", | |
bd4c625c LT |
1190 | arg); |
1191 | return 0; | |
1192 | } | |
1193 | *commit_max_age = (unsigned int)val; | |
1da177e4 | 1194 | } |
1da177e4 | 1195 | |
bd4c625c | 1196 | if (c == 'w') { |
45b03d5e JM |
1197 | reiserfs_warning(s, "super-6509", "nolargeio option " |
1198 | "is no longer supported"); | |
36b756f2 | 1199 | return 0; |
1da177e4 | 1200 | } |
1da177e4 | 1201 | |
bd4c625c LT |
1202 | if (c == 'j') { |
1203 | if (arg && *arg && jdev_name) { | |
098297b2 JM |
1204 | /* Hm, already assigned? */ |
1205 | if (*jdev_name) { | |
45b03d5e JM |
1206 | reiserfs_warning(s, "super-6510", |
1207 | "journal device was " | |
1208 | "already specified to " | |
1209 | "be %s", *jdev_name); | |
bd4c625c LT |
1210 | return 0; |
1211 | } | |
1212 | *jdev_name = arg; | |
1213 | } | |
1da177e4 | 1214 | } |
bd4c625c LT |
1215 | #ifdef CONFIG_QUOTA |
1216 | if (c == 'u' || c == 'g') { | |
1217 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; | |
1218 | ||
6929f891 | 1219 | if (sb_any_quota_loaded(s) && |
00b44197 | 1220 | (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { |
45b03d5e JM |
1221 | reiserfs_warning(s, "super-6511", |
1222 | "cannot change journaled " | |
1223 | "quota options when quota " | |
1224 | "turned on."); | |
bd4c625c LT |
1225 | return 0; |
1226 | } | |
1227 | if (*arg) { /* Some filename specified? */ | |
1228 | if (REISERFS_SB(s)->s_qf_names[qtype] | |
1229 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], | |
1230 | arg)) { | |
45b03d5e JM |
1231 | reiserfs_warning(s, "super-6512", |
1232 | "%s quota file " | |
1233 | "already specified.", | |
bd4c625c LT |
1234 | QTYPE2NAME(qtype)); |
1235 | return 0; | |
1236 | } | |
1237 | if (strchr(arg, '/')) { | |
45b03d5e JM |
1238 | reiserfs_warning(s, "super-6513", |
1239 | "quotafile must be " | |
1240 | "on filesystem root."); | |
bd4c625c LT |
1241 | return 0; |
1242 | } | |
af591ad8 | 1243 | qf_names[qtype] = kstrdup(arg, GFP_KERNEL); |
00b44197 | 1244 | if (!qf_names[qtype]) { |
45b03d5e JM |
1245 | reiserfs_warning(s, "reiserfs-2502", |
1246 | "not enough memory " | |
1247 | "for storing " | |
1248 | "quotafile name."); | |
bd4c625c LT |
1249 | return 0; |
1250 | } | |
c3aa0776 JK |
1251 | if (qtype == USRQUOTA) |
1252 | *mount_options |= 1 << REISERFS_USRQUOTA; | |
1253 | else | |
1254 | *mount_options |= 1 << REISERFS_GRPQUOTA; | |
bd4c625c | 1255 | } else { |
00b44197 JK |
1256 | if (qf_names[qtype] != |
1257 | REISERFS_SB(s)->s_qf_names[qtype]) | |
1258 | kfree(qf_names[qtype]); | |
1259 | qf_names[qtype] = NULL; | |
c3aa0776 JK |
1260 | if (qtype == USRQUOTA) |
1261 | *mount_options &= ~(1 << REISERFS_USRQUOTA); | |
1262 | else | |
1263 | *mount_options &= ~(1 << REISERFS_GRPQUOTA); | |
bd4c625c | 1264 | } |
1da177e4 | 1265 | } |
bd4c625c LT |
1266 | if (c == 'f') { |
1267 | if (!strcmp(arg, "vfsold")) | |
00b44197 | 1268 | *qfmt = QFMT_VFS_OLD; |
bd4c625c | 1269 | else if (!strcmp(arg, "vfsv0")) |
00b44197 | 1270 | *qfmt = QFMT_VFS_V0; |
bd4c625c | 1271 | else { |
45b03d5e JM |
1272 | reiserfs_warning(s, "super-6514", |
1273 | "unknown quota format " | |
1274 | "specified."); | |
bd4c625c LT |
1275 | return 0; |
1276 | } | |
6929f891 | 1277 | if (sb_any_quota_loaded(s) && |
00b44197 | 1278 | *qfmt != REISERFS_SB(s)->s_jquota_fmt) { |
45b03d5e JM |
1279 | reiserfs_warning(s, "super-6515", |
1280 | "cannot change journaled " | |
1281 | "quota options when quota " | |
1282 | "turned on."); | |
00b44197 JK |
1283 | return 0; |
1284 | } | |
1da177e4 | 1285 | } |
bd4c625c LT |
1286 | #else |
1287 | if (c == 'u' || c == 'g' || c == 'f') { | |
45b03d5e JM |
1288 | reiserfs_warning(s, "reiserfs-2503", "journaled " |
1289 | "quota options not supported."); | |
bd4c625c | 1290 | return 0; |
1da177e4 | 1291 | } |
bd4c625c LT |
1292 | #endif |
1293 | } | |
1294 | ||
1295 | #ifdef CONFIG_QUOTA | |
00b44197 JK |
1296 | if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
1297 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { | |
45b03d5e JM |
1298 | reiserfs_warning(s, "super-6515", |
1299 | "journaled quota format not specified."); | |
1da177e4 | 1300 | return 0; |
1da177e4 | 1301 | } |
c3aa0776 JK |
1302 | if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && |
1303 | sb_has_quota_loaded(s, USRQUOTA)) || | |
1304 | (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && | |
1305 | sb_has_quota_loaded(s, GRPQUOTA))) { | |
45b03d5e JM |
1306 | reiserfs_warning(s, "super-6516", "quota options must " |
1307 | "be present when quota is turned on."); | |
bd4c625c | 1308 | return 0; |
1da177e4 LT |
1309 | } |
1310 | #endif | |
556a2a45 | 1311 | |
bd4c625c | 1312 | return 1; |
1da177e4 LT |
1313 | } |
1314 | ||
bd4c625c LT |
1315 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1316 | { | |
1317 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | | |
1318 | (1 << REISERFS_DATA_ORDERED) | | |
1319 | (1 << REISERFS_DATA_WRITEBACK)); | |
1320 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); | |
1da177e4 LT |
1321 | } |
1322 | ||
1323 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) | |
1324 | { | |
bd4c625c LT |
1325 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1326 | if (!reiserfs_data_log(s)) { | |
1327 | switch_data_mode(s, REISERFS_DATA_LOG); | |
1328 | reiserfs_info(s, "switching to journaled data mode\n"); | |
1329 | } | |
1330 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { | |
1331 | if (!reiserfs_data_ordered(s)) { | |
1332 | switch_data_mode(s, REISERFS_DATA_ORDERED); | |
1333 | reiserfs_info(s, "switching to ordered data mode\n"); | |
1334 | } | |
1335 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { | |
1336 | if (!reiserfs_data_writeback(s)) { | |
1337 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); | |
1338 | reiserfs_info(s, "switching to writeback data mode\n"); | |
1339 | } | |
1340 | } | |
1da177e4 LT |
1341 | } |
1342 | ||
bd4c625c LT |
1343 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1344 | { | |
1345 | int flush = (1 << REISERFS_BARRIER_FLUSH); | |
1346 | int none = (1 << REISERFS_BARRIER_NONE); | |
1347 | int all_barrier = flush | none; | |
1348 | ||
1349 | if (bits & all_barrier) { | |
1350 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; | |
1351 | if (bits & flush) { | |
1352 | REISERFS_SB(s)->s_mount_opt |= flush; | |
1353 | printk("reiserfs: enabling write barrier flush mode\n"); | |
1354 | } else if (bits & none) { | |
1355 | REISERFS_SB(s)->s_mount_opt |= none; | |
1356 | printk("reiserfs: write barriers turned off\n"); | |
1357 | } | |
1358 | } | |
1da177e4 LT |
1359 | } |
1360 | ||
bd4c625c | 1361 | static void handle_attrs(struct super_block *s) |
1da177e4 | 1362 | { |
bd4c625c | 1363 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1364 | |
bd4c625c LT |
1365 | if (reiserfs_attrs(s)) { |
1366 | if (old_format_only(s)) { | |
45b03d5e JM |
1367 | reiserfs_warning(s, "super-6517", "cannot support " |
1368 | "attributes on 3.5.x disk format"); | |
bd4c625c | 1369 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1370 | return; |
1371 | } | |
bd4c625c | 1372 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
45b03d5e JM |
1373 | reiserfs_warning(s, "super-6518", "cannot support " |
1374 | "attributes until flag is set in " | |
1375 | "super-block"); | |
bd4c625c | 1376 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1377 | } |
1378 | } | |
1379 | } | |
1380 | ||
00b44197 JK |
1381 | #ifdef CONFIG_QUOTA |
1382 | static void handle_quota_files(struct super_block *s, char **qf_names, | |
1383 | unsigned int *qfmt) | |
1384 | { | |
1385 | int i; | |
1386 | ||
aca60617 | 1387 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
00b44197 JK |
1388 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) |
1389 | kfree(REISERFS_SB(s)->s_qf_names[i]); | |
1390 | REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; | |
1391 | } | |
a06d789b JK |
1392 | if (*qfmt) |
1393 | REISERFS_SB(s)->s_jquota_fmt = *qfmt; | |
00b44197 JK |
1394 | } |
1395 | #endif | |
1396 | ||
bd4c625c | 1397 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1da177e4 | 1398 | { |
bd4c625c LT |
1399 | struct reiserfs_super_block *rs; |
1400 | struct reiserfs_transaction_handle th; | |
1401 | unsigned long blocks; | |
1402 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; | |
1403 | unsigned long safe_mask = 0; | |
1404 | unsigned int commit_max_age = (unsigned int)-1; | |
1405 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
b9d8905e | 1406 | char *new_opts; |
bd4c625c | 1407 | int err; |
aca60617 | 1408 | char *qf_names[REISERFS_MAXQUOTAS]; |
00b44197 | 1409 | unsigned int qfmt = 0; |
1da177e4 | 1410 | #ifdef CONFIG_QUOTA |
bd4c625c | 1411 | int i; |
8ebc4232 | 1412 | #endif |
00b44197 | 1413 | |
b9d8905e MP |
1414 | new_opts = kstrdup(arg, GFP_KERNEL); |
1415 | if (arg && !new_opts) | |
1416 | return -ENOMEM; | |
1417 | ||
02b9984d | 1418 | sync_filesystem(s); |
8ebc4232 | 1419 | reiserfs_write_lock(s); |
00b44197 | 1420 | |
8ebc4232 | 1421 | #ifdef CONFIG_QUOTA |
00b44197 | 1422 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); |
1da177e4 LT |
1423 | #endif |
1424 | ||
bd4c625c | 1425 | rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1426 | |
bd4c625c | 1427 | if (!reiserfs_parse_options |
00b44197 JK |
1428 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
1429 | qf_names, &qfmt)) { | |
1da177e4 | 1430 | #ifdef CONFIG_QUOTA |
aca60617 | 1431 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) |
00b44197 JK |
1432 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) |
1433 | kfree(qf_names[i]); | |
1da177e4 | 1434 | #endif |
cdf6ccc8 | 1435 | err = -EINVAL; |
4c05141d | 1436 | goto out_err_unlock; |
bd4c625c | 1437 | } |
00b44197 JK |
1438 | #ifdef CONFIG_QUOTA |
1439 | handle_quota_files(s, qf_names, &qfmt); | |
1440 | #endif | |
bd4c625c LT |
1441 | |
1442 | handle_attrs(s); | |
1443 | ||
1444 | /* Add options that are safe here */ | |
1445 | safe_mask |= 1 << REISERFS_SMALLTAIL; | |
1446 | safe_mask |= 1 << REISERFS_LARGETAIL; | |
1447 | safe_mask |= 1 << REISERFS_NO_BORDER; | |
1448 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; | |
1449 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; | |
1450 | safe_mask |= 1 << REISERFS_TEST4; | |
1451 | safe_mask |= 1 << REISERFS_ATTRS; | |
1452 | safe_mask |= 1 << REISERFS_XATTRS_USER; | |
1453 | safe_mask |= 1 << REISERFS_POSIXACL; | |
1454 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; | |
1455 | safe_mask |= 1 << REISERFS_BARRIER_NONE; | |
1456 | safe_mask |= 1 << REISERFS_ERROR_RO; | |
1457 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; | |
1458 | safe_mask |= 1 << REISERFS_ERROR_PANIC; | |
c3aa0776 JK |
1459 | safe_mask |= 1 << REISERFS_USRQUOTA; |
1460 | safe_mask |= 1 << REISERFS_GRPQUOTA; | |
bd4c625c | 1461 | |
098297b2 JM |
1462 | /* |
1463 | * Update the bitmask, taking care to keep | |
1464 | * the bits we're not allowed to change here | |
1465 | */ | |
bd4c625c LT |
1466 | REISERFS_SB(s)->s_mount_opt = |
1467 | (REISERFS_SB(s)-> | |
1468 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); | |
1469 | ||
1470 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { | |
1471 | journal->j_max_commit_age = commit_max_age; | |
1472 | journal->j_max_trans_age = commit_max_age; | |
1473 | } else if (commit_max_age == 0) { | |
1474 | /* 0 means restore defaults. */ | |
1475 | journal->j_max_commit_age = journal->j_default_max_commit_age; | |
1476 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
1477 | } | |
1478 | ||
1479 | if (blocks) { | |
cdf6ccc8 MS |
1480 | err = reiserfs_resize(s, blocks); |
1481 | if (err != 0) | |
4c05141d | 1482 | goto out_err_unlock; |
bd4c625c LT |
1483 | } |
1484 | ||
1485 | if (*mount_flags & MS_RDONLY) { | |
4c05141d | 1486 | reiserfs_write_unlock(s); |
bd4c625c LT |
1487 | reiserfs_xattr_init(s, *mount_flags); |
1488 | /* remount read-only */ | |
1489 | if (s->s_flags & MS_RDONLY) | |
1490 | /* it is read-only already */ | |
4c05141d | 1491 | goto out_ok_unlocked; |
c79d967d | 1492 | |
0f0dd62f CH |
1493 | err = dquot_suspend(s, -1); |
1494 | if (err < 0) | |
c79d967d | 1495 | goto out_err; |
c79d967d | 1496 | |
bd4c625c LT |
1497 | /* try to remount file system with read-only permissions */ |
1498 | if (sb_umount_state(rs) == REISERFS_VALID_FS | |
1499 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { | |
4c05141d | 1500 | goto out_ok_unlocked; |
bd4c625c LT |
1501 | } |
1502 | ||
4c05141d JM |
1503 | reiserfs_write_lock(s); |
1504 | ||
bd4c625c LT |
1505 | err = journal_begin(&th, s, 10); |
1506 | if (err) | |
4c05141d | 1507 | goto out_err_unlock; |
bd4c625c LT |
1508 | |
1509 | /* Mounting a rw partition read-only. */ | |
1510 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1511 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); | |
09f1b80b | 1512 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
bd4c625c LT |
1513 | } else { |
1514 | /* remount read-write */ | |
1515 | if (!(s->s_flags & MS_RDONLY)) { | |
4c05141d | 1516 | reiserfs_write_unlock(s); |
bd4c625c | 1517 | reiserfs_xattr_init(s, *mount_flags); |
4c05141d | 1518 | goto out_ok_unlocked; /* We are read-write already */ |
bd4c625c LT |
1519 | } |
1520 | ||
cdf6ccc8 MS |
1521 | if (reiserfs_is_journal_aborted(journal)) { |
1522 | err = journal->j_errno; | |
4c05141d | 1523 | goto out_err_unlock; |
cdf6ccc8 | 1524 | } |
bd4c625c LT |
1525 | |
1526 | handle_data_mode(s, mount_options); | |
1527 | handle_barrier_mode(s, mount_options); | |
1528 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
098297b2 JM |
1529 | |
1530 | /* now it is safe to call journal_begin */ | |
1531 | s->s_flags &= ~MS_RDONLY; | |
bd4c625c LT |
1532 | err = journal_begin(&th, s, 10); |
1533 | if (err) | |
4c05141d | 1534 | goto out_err_unlock; |
bd4c625c LT |
1535 | |
1536 | /* Mount a partition which is read-only, read-write */ | |
1537 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1538 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1539 | s->s_flags &= ~MS_RDONLY; | |
1540 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
702d21c6 JM |
1541 | if (!old_format_only(s)) |
1542 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
bd4c625c | 1543 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
09f1b80b | 1544 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
bd4c625c LT |
1545 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; |
1546 | } | |
1547 | /* this will force a full flush of all journal lists */ | |
1548 | SB_JOURNAL(s)->j_must_wait = 1; | |
58d85426 | 1549 | err = journal_end(&th); |
bd4c625c | 1550 | if (err) |
4c05141d | 1551 | goto out_err_unlock; |
bd4c625c | 1552 | |
4c05141d | 1553 | reiserfs_write_unlock(s); |
bd4c625c | 1554 | if (!(*mount_flags & MS_RDONLY)) { |
0f0dd62f | 1555 | dquot_resume(s, -1); |
3bb3e1fc | 1556 | reiserfs_write_lock(s); |
bd4c625c | 1557 | finish_unfinished(s); |
4c05141d | 1558 | reiserfs_write_unlock(s); |
bd4c625c LT |
1559 | reiserfs_xattr_init(s, *mount_flags); |
1560 | } | |
1561 | ||
4c05141d | 1562 | out_ok_unlocked: |
b9d8905e MP |
1563 | if (new_opts) |
1564 | replace_mount_options(s, new_opts); | |
bd4c625c | 1565 | return 0; |
cdf6ccc8 | 1566 | |
4c05141d | 1567 | out_err_unlock: |
3bb3e1fc | 1568 | reiserfs_write_unlock(s); |
cdf6ccc8 MS |
1569 | out_err: |
1570 | kfree(new_opts); | |
1571 | return err; | |
1da177e4 LT |
1572 | } |
1573 | ||
bd4c625c | 1574 | static int read_super_block(struct super_block *s, int offset) |
1da177e4 | 1575 | { |
bd4c625c LT |
1576 | struct buffer_head *bh; |
1577 | struct reiserfs_super_block *rs; | |
1578 | int fs_blocksize; | |
1da177e4 | 1579 | |
bd4c625c LT |
1580 | bh = sb_bread(s, offset / s->s_blocksize); |
1581 | if (!bh) { | |
45b03d5e | 1582 | reiserfs_warning(s, "sh-2006", |
bd4c625c | 1583 | "bread failed (dev %s, block %lu, size %lu)", |
2ccdc413 | 1584 | s->s_id, offset / s->s_blocksize, |
bd4c625c LT |
1585 | s->s_blocksize); |
1586 | return 1; | |
1587 | } | |
1da177e4 | 1588 | |
bd4c625c LT |
1589 | rs = (struct reiserfs_super_block *)bh->b_data; |
1590 | if (!is_any_reiserfs_magic_string(rs)) { | |
1591 | brelse(bh); | |
1592 | return 1; | |
1593 | } | |
098297b2 JM |
1594 | /* |
1595 | * ok, reiserfs signature (old or new) found in at the given offset | |
1596 | */ | |
bd4c625c LT |
1597 | fs_blocksize = sb_blocksize(rs); |
1598 | brelse(bh); | |
1599 | sb_set_blocksize(s, fs_blocksize); | |
1da177e4 | 1600 | |
bd4c625c LT |
1601 | bh = sb_bread(s, offset / s->s_blocksize); |
1602 | if (!bh) { | |
45b03d5e JM |
1603 | reiserfs_warning(s, "sh-2007", |
1604 | "bread failed (dev %s, block %lu, size %lu)", | |
2ccdc413 | 1605 | s->s_id, offset / s->s_blocksize, |
bd4c625c LT |
1606 | s->s_blocksize); |
1607 | return 1; | |
1608 | } | |
1da177e4 | 1609 | |
bd4c625c LT |
1610 | rs = (struct reiserfs_super_block *)bh->b_data; |
1611 | if (sb_blocksize(rs) != s->s_blocksize) { | |
45b03d5e | 1612 | reiserfs_warning(s, "sh-2011", "can't find a reiserfs " |
53872ed0 | 1613 | "filesystem on (dev %s, block %llu, size %lu)", |
2ccdc413 | 1614 | s->s_id, |
bd4c625c LT |
1615 | (unsigned long long)bh->b_blocknr, |
1616 | s->s_blocksize); | |
1617 | brelse(bh); | |
1618 | return 1; | |
1619 | } | |
1da177e4 | 1620 | |
bd4c625c LT |
1621 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
1622 | brelse(bh); | |
45b03d5e JM |
1623 | reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " |
1624 | "--rebuild-tree run detected. Please run\n" | |
1625 | "reiserfsck --rebuild-tree and wait for a " | |
1626 | "completion. If that fails\n" | |
bd4c625c LT |
1627 | "get newer reiserfsprogs package"); |
1628 | return 1; | |
1da177e4 | 1629 | } |
1da177e4 | 1630 | |
bd4c625c LT |
1631 | SB_BUFFER_WITH_SB(s) = bh; |
1632 | SB_DISK_SUPER_BLOCK(s) = rs; | |
1633 | ||
098297b2 JM |
1634 | /* |
1635 | * magic is of non-standard journal filesystem, look at s_version to | |
1636 | * find which format is in use | |
1637 | */ | |
bd4c625c | 1638 | if (is_reiserfs_jr(rs)) { |
bd4c625c | 1639 | if (sb_version(rs) == REISERFS_VERSION_2) |
1d889d99 JM |
1640 | reiserfs_info(s, "found reiserfs format \"3.6\"" |
1641 | " with non-standard journal\n"); | |
bd4c625c | 1642 | else if (sb_version(rs) == REISERFS_VERSION_1) |
1d889d99 JM |
1643 | reiserfs_info(s, "found reiserfs format \"3.5\"" |
1644 | " with non-standard journal\n"); | |
bd4c625c | 1645 | else { |
45b03d5e JM |
1646 | reiserfs_warning(s, "sh-2012", "found unknown " |
1647 | "format \"%u\" of reiserfs with " | |
1648 | "non-standard magic", sb_version(rs)); | |
bd4c625c LT |
1649 | return 1; |
1650 | } | |
1651 | } else | |
098297b2 JM |
1652 | /* |
1653 | * s_version of standard format may contain incorrect | |
1654 | * information, so we just look at the magic string | |
1655 | */ | |
bd4c625c LT |
1656 | reiserfs_info(s, |
1657 | "found reiserfs format \"%s\" with standard journal\n", | |
1658 | is_reiserfs_3_5(rs) ? "3.5" : "3.6"); | |
1659 | ||
1660 | s->s_op = &reiserfs_sops; | |
1661 | s->s_export_op = &reiserfs_export_ops; | |
1da177e4 | 1662 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
1663 | s->s_qcop = &reiserfs_qctl_operations; |
1664 | s->dq_op = &reiserfs_quota_operations; | |
53873638 | 1665 | s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
1da177e4 LT |
1666 | #endif |
1667 | ||
098297b2 JM |
1668 | /* |
1669 | * new format is limited by the 32 bit wide i_blocks field, want to | |
1670 | * be one full block below that. | |
bd4c625c LT |
1671 | */ |
1672 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; | |
1673 | return 0; | |
1da177e4 LT |
1674 | } |
1675 | ||
1da177e4 | 1676 | /* after journal replay, reread all bitmap and super blocks */ |
bd4c625c LT |
1677 | static int reread_meta_blocks(struct super_block *s) |
1678 | { | |
dfec8a14 | 1679 | ll_rw_block(REQ_OP_READ, 0, 1, &SB_BUFFER_WITH_SB(s)); |
bd4c625c LT |
1680 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); |
1681 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { | |
45b03d5e | 1682 | reiserfs_warning(s, "reiserfs-2504", "error reading the super"); |
bd4c625c LT |
1683 | return 1; |
1684 | } | |
1da177e4 | 1685 | |
bd4c625c | 1686 | return 0; |
bd4c625c | 1687 | } |
1da177e4 | 1688 | |
098297b2 | 1689 | /* hash detection stuff */ |
1da177e4 | 1690 | |
098297b2 JM |
1691 | /* |
1692 | * if root directory is empty - we set default - Yura's - hash and | |
1693 | * warn about it | |
1694 | * FIXME: we look for only one name in a directory. If tea and yura | |
1695 | * both have the same value - we ask user to send report to the | |
1696 | * mailing list | |
1697 | */ | |
bd4c625c | 1698 | static __u32 find_hash_out(struct super_block *s) |
1da177e4 | 1699 | { |
bd4c625c LT |
1700 | int retval; |
1701 | struct inode *inode; | |
1702 | struct cpu_key key; | |
1703 | INITIALIZE_PATH(path); | |
1704 | struct reiserfs_dir_entry de; | |
c48138c2 | 1705 | struct reiserfs_de_head *deh; |
bd4c625c | 1706 | __u32 hash = DEFAULT_HASH; |
c48138c2 | 1707 | __u32 deh_hashval, teahash, r5hash, yurahash; |
bd4c625c | 1708 | |
2b0143b5 | 1709 | inode = d_inode(s->s_root); |
bd4c625c | 1710 | |
c48138c2 JM |
1711 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); |
1712 | retval = search_by_entry_key(s, &key, &path, &de); | |
1713 | if (retval == IO_ERROR) { | |
1714 | pathrelse(&path); | |
1715 | return UNSET_HASH; | |
1716 | } | |
1717 | if (retval == NAME_NOT_FOUND) | |
1718 | de.de_entry_num--; | |
bd4c625c | 1719 | |
c48138c2 JM |
1720 | set_de_name_and_namelen(&de); |
1721 | deh = de.de_deh + de.de_entry_num; | |
1722 | ||
1723 | if (deh_offset(deh) == DOT_DOT_OFFSET) { | |
1724 | /* allow override in this case */ | |
1725 | if (reiserfs_rupasov_hash(s)) | |
bd4c625c | 1726 | hash = YURA_HASH; |
c48138c2 JM |
1727 | reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n"); |
1728 | goto out; | |
1729 | } | |
bd4c625c | 1730 | |
c48138c2 JM |
1731 | deh_hashval = GET_HASH_VALUE(deh_offset(deh)); |
1732 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); | |
1733 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); | |
1734 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); | |
1735 | ||
1736 | if ((teahash == r5hash && deh_hashval == r5hash) || | |
1737 | (teahash == yurahash && deh_hashval == yurahash) || | |
1738 | (r5hash == yurahash && deh_hashval == yurahash)) { | |
1739 | reiserfs_warning(s, "reiserfs-2506", | |
1740 | "Unable to automatically detect hash " | |
1741 | "function. Please mount with -o " | |
1742 | "hash={tea,rupasov,r5}"); | |
1743 | hash = UNSET_HASH; | |
1744 | goto out; | |
1745 | } | |
1746 | ||
1747 | if (deh_hashval == yurahash) | |
1748 | hash = YURA_HASH; | |
1749 | else if (deh_hashval == teahash) | |
1750 | hash = TEA_HASH; | |
1751 | else if (deh_hashval == r5hash) | |
1752 | hash = R5_HASH; | |
1753 | else { | |
1754 | reiserfs_warning(s, "reiserfs-2506", | |
1755 | "Unrecognised hash function"); | |
1756 | hash = UNSET_HASH; | |
1757 | } | |
1758 | out: | |
bd4c625c LT |
1759 | pathrelse(&path); |
1760 | return hash; | |
1da177e4 LT |
1761 | } |
1762 | ||
098297b2 | 1763 | /* finds out which hash names are sorted with */ |
bd4c625c | 1764 | static int what_hash(struct super_block *s) |
1da177e4 | 1765 | { |
bd4c625c LT |
1766 | __u32 code; |
1767 | ||
1768 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); | |
1769 | ||
098297b2 JM |
1770 | /* |
1771 | * reiserfs_hash_detect() == true if any of the hash mount options | |
1772 | * were used. We must check them to make sure the user isn't | |
1773 | * using a bad hash value | |
bd4c625c LT |
1774 | */ |
1775 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) | |
1776 | code = find_hash_out(s); | |
1777 | ||
1778 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { | |
098297b2 JM |
1779 | /* |
1780 | * detection has found the hash, and we must check against the | |
1781 | * mount options | |
bd4c625c LT |
1782 | */ |
1783 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { | |
45b03d5e JM |
1784 | reiserfs_warning(s, "reiserfs-2507", |
1785 | "Error, %s hash detected, " | |
bd4c625c LT |
1786 | "unable to force rupasov hash", |
1787 | reiserfs_hashname(code)); | |
1788 | code = UNSET_HASH; | |
1789 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { | |
45b03d5e JM |
1790 | reiserfs_warning(s, "reiserfs-2508", |
1791 | "Error, %s hash detected, " | |
bd4c625c LT |
1792 | "unable to force tea hash", |
1793 | reiserfs_hashname(code)); | |
1794 | code = UNSET_HASH; | |
1795 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { | |
45b03d5e JM |
1796 | reiserfs_warning(s, "reiserfs-2509", |
1797 | "Error, %s hash detected, " | |
bd4c625c LT |
1798 | "unable to force r5 hash", |
1799 | reiserfs_hashname(code)); | |
1800 | code = UNSET_HASH; | |
1801 | } | |
1802 | } else { | |
098297b2 JM |
1803 | /* |
1804 | * find_hash_out was not called or | |
1805 | * could not determine the hash | |
1806 | */ | |
bd4c625c LT |
1807 | if (reiserfs_rupasov_hash(s)) { |
1808 | code = YURA_HASH; | |
1809 | } else if (reiserfs_tea_hash(s)) { | |
1810 | code = TEA_HASH; | |
1811 | } else if (reiserfs_r5_hash(s)) { | |
1812 | code = R5_HASH; | |
1813 | } | |
1814 | } | |
1815 | ||
098297b2 JM |
1816 | /* |
1817 | * if we are mounted RW, and we have a new valid hash code, update | |
1818 | * the super | |
bd4c625c LT |
1819 | */ |
1820 | if (code != UNSET_HASH && | |
1821 | !(s->s_flags & MS_RDONLY) && | |
1822 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { | |
1823 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); | |
1824 | } | |
1825 | return code; | |
1da177e4 LT |
1826 | } |
1827 | ||
098297b2 | 1828 | /* return pointer to appropriate function */ |
bd4c625c | 1829 | static hashf_t hash_function(struct super_block *s) |
1da177e4 | 1830 | { |
bd4c625c LT |
1831 | switch (what_hash(s)) { |
1832 | case TEA_HASH: | |
1833 | reiserfs_info(s, "Using tea hash to sort names\n"); | |
1834 | return keyed_hash; | |
1835 | case YURA_HASH: | |
1836 | reiserfs_info(s, "Using rupasov hash to sort names\n"); | |
1837 | return yura_hash; | |
1838 | case R5_HASH: | |
1839 | reiserfs_info(s, "Using r5 hash to sort names\n"); | |
1840 | return r5_hash; | |
1841 | } | |
1842 | return NULL; | |
1da177e4 LT |
1843 | } |
1844 | ||
098297b2 | 1845 | /* this is used to set up correct value for old partitions */ |
bd4c625c | 1846 | static int function2code(hashf_t func) |
1da177e4 | 1847 | { |
bd4c625c LT |
1848 | if (func == keyed_hash) |
1849 | return TEA_HASH; | |
1850 | if (func == yura_hash) | |
1851 | return YURA_HASH; | |
1852 | if (func == r5_hash) | |
1853 | return R5_HASH; | |
1da177e4 | 1854 | |
098297b2 | 1855 | BUG(); /* should never happen */ |
1da177e4 | 1856 | |
bd4c625c | 1857 | return 0; |
1da177e4 LT |
1858 | } |
1859 | ||
45b03d5e | 1860 | #define SWARN(silent, s, id, ...) \ |
1da177e4 | 1861 | if (!(silent)) \ |
45b03d5e | 1862 | reiserfs_warning(s, id, __VA_ARGS__) |
1da177e4 | 1863 | |
bd4c625c | 1864 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1da177e4 | 1865 | { |
bd4c625c | 1866 | struct inode *root_inode; |
bd4c625c LT |
1867 | struct reiserfs_transaction_handle th; |
1868 | int old_format = 0; | |
1869 | unsigned long blocks; | |
1870 | unsigned int commit_max_age = 0; | |
1871 | int jinit_done = 0; | |
1872 | struct reiserfs_iget_args args; | |
1873 | struct reiserfs_super_block *rs; | |
1874 | char *jdev_name; | |
1875 | struct reiserfs_sb_info *sbi; | |
1876 | int errval = -EINVAL; | |
aca60617 | 1877 | char *qf_names[REISERFS_MAXQUOTAS] = {}; |
00b44197 | 1878 | unsigned int qfmt = 0; |
bd4c625c | 1879 | |
cdf6ccc8 MS |
1880 | save_mount_options(s, data); |
1881 | ||
01afb213 | 1882 | sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
b7b7fa43 JM |
1883 | if (!sbi) |
1884 | return -ENOMEM; | |
bd4c625c | 1885 | s->s_fs_info = sbi; |
bd4c625c | 1886 | /* Set default values for options: non-aggressive tails, RO on errors */ |
efaa33eb AB |
1887 | sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); |
1888 | sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); | |
1889 | sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); | |
098297b2 | 1890 | /* no preallocation minimum, be smart in reiserfs_file_write instead */ |
efaa33eb | 1891 | sbi->s_alloc_options.preallocmin = 0; |
bd4c625c | 1892 | /* Preallocate by 16 blocks (17-1) at once */ |
efaa33eb | 1893 | sbi->s_alloc_options.preallocsize = 17; |
bd4c625c LT |
1894 | /* setup default block allocator options */ |
1895 | reiserfs_init_alloc_options(s); | |
1896 | ||
033369d1 AB |
1897 | spin_lock_init(&sbi->old_work_lock); |
1898 | INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); | |
efaa33eb AB |
1899 | mutex_init(&sbi->lock); |
1900 | sbi->lock_depth = -1; | |
8ebc4232 | 1901 | |
797d9016 JM |
1902 | sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0, |
1903 | s->s_id); | |
1904 | if (!sbi->commit_wq) { | |
1905 | SWARN(silent, s, "", "Cannot allocate commit workqueue"); | |
1906 | errval = -ENOMEM; | |
1907 | goto error_unlocked; | |
1908 | } | |
1909 | ||
bd4c625c LT |
1910 | jdev_name = NULL; |
1911 | if (reiserfs_parse_options | |
a228bf8f | 1912 | (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name, |
00b44197 | 1913 | &commit_max_age, qf_names, &qfmt) == 0) { |
f32485be | 1914 | goto error_unlocked; |
bd4c625c | 1915 | } |
c3aa0776 | 1916 | if (jdev_name && jdev_name[0]) { |
efaa33eb AB |
1917 | sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL); |
1918 | if (!sbi->s_jdev) { | |
c3aa0776 JK |
1919 | SWARN(silent, s, "", "Cannot allocate memory for " |
1920 | "journal device name"); | |
1921 | goto error; | |
1922 | } | |
1923 | } | |
00b44197 JK |
1924 | #ifdef CONFIG_QUOTA |
1925 | handle_quota_files(s, qf_names, &qfmt); | |
1926 | #endif | |
bd4c625c LT |
1927 | |
1928 | if (blocks) { | |
45b03d5e | 1929 | SWARN(silent, s, "jmacd-7", "resize option for remount only"); |
f32485be | 1930 | goto error_unlocked; |
bd4c625c LT |
1931 | } |
1932 | ||
098297b2 JM |
1933 | /* |
1934 | * try old format (undistributed bitmap, super block in 8-th 1k | |
1935 | * block of a device) | |
1936 | */ | |
bd4c625c LT |
1937 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) |
1938 | old_format = 1; | |
098297b2 JM |
1939 | |
1940 | /* | |
1941 | * try new format (64-th 1k block), which can contain reiserfs | |
1942 | * super block | |
1943 | */ | |
bd4c625c | 1944 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { |
45b03d5e | 1945 | SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", |
2ccdc413 | 1946 | s->s_id); |
f32485be | 1947 | goto error_unlocked; |
bd4c625c LT |
1948 | } |
1949 | ||
1950 | rs = SB_DISK_SUPER_BLOCK(s); | |
098297b2 JM |
1951 | /* |
1952 | * Let's do basic sanity check to verify that underlying device is not | |
1953 | * smaller than the filesystem. If the check fails then abort and | |
1954 | * scream, because bad stuff will happen otherwise. | |
1955 | */ | |
bd4c625c LT |
1956 | if (s->s_bdev && s->s_bdev->bd_inode |
1957 | && i_size_read(s->s_bdev->bd_inode) < | |
1958 | sb_block_count(rs) * sb_blocksize(rs)) { | |
45b03d5e JM |
1959 | SWARN(silent, s, "", "Filesystem cannot be " |
1960 | "mounted because it is bigger than the device"); | |
1961 | SWARN(silent, s, "", "You may need to run fsck " | |
1962 | "or increase size of your LVM partition"); | |
1963 | SWARN(silent, s, "", "Or may be you forgot to " | |
1964 | "reboot after fdisk when it told you to"); | |
f32485be | 1965 | goto error_unlocked; |
bd4c625c LT |
1966 | } |
1967 | ||
1968 | sbi->s_mount_state = SB_REISERFS_STATE(s); | |
1969 | sbi->s_mount_state = REISERFS_VALID_FS; | |
1970 | ||
6f01046b | 1971 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
45b03d5e | 1972 | SWARN(silent, s, "jmacd-8", "unable to read bitmap"); |
f32485be | 1973 | goto error_unlocked; |
bd4c625c | 1974 | } |
f32485be | 1975 | |
d2c89a42 | 1976 | errval = -EINVAL; |
1da177e4 | 1977 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1978 | SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); |
1979 | SWARN(silent, s, "", "- it is slow mode for debugging."); | |
1da177e4 LT |
1980 | #endif |
1981 | ||
bd4c625c LT |
1982 | /* make data=ordered the default */ |
1983 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && | |
1984 | !reiserfs_data_writeback(s)) { | |
efaa33eb | 1985 | sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); |
bd4c625c LT |
1986 | } |
1987 | ||
1988 | if (reiserfs_data_log(s)) { | |
1989 | reiserfs_info(s, "using journaled data mode\n"); | |
1990 | } else if (reiserfs_data_ordered(s)) { | |
1991 | reiserfs_info(s, "using ordered data mode\n"); | |
1992 | } else { | |
1993 | reiserfs_info(s, "using writeback data mode\n"); | |
1994 | } | |
1995 | if (reiserfs_barrier_flush(s)) { | |
1996 | printk("reiserfs: using flush barriers\n"); | |
1997 | } | |
f32485be | 1998 | |
37c69b98 FW |
1999 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { |
2000 | SWARN(silent, s, "sh-2022", | |
2001 | "unable to initialize journal space"); | |
2002 | goto error_unlocked; | |
2003 | } else { | |
098297b2 JM |
2004 | /* |
2005 | * once this is set, journal_release must be called | |
2006 | * if we error out of the mount | |
2007 | */ | |
2008 | jinit_done = 1; | |
37c69b98 FW |
2009 | } |
2010 | ||
bd4c625c | 2011 | if (reread_meta_blocks(s)) { |
45b03d5e JM |
2012 | SWARN(silent, s, "jmacd-9", |
2013 | "unable to reread meta blocks after journal init"); | |
9b467e6e | 2014 | goto error_unlocked; |
bd4c625c LT |
2015 | } |
2016 | ||
2017 | if (replay_only(s)) | |
9b467e6e | 2018 | goto error_unlocked; |
bd4c625c LT |
2019 | |
2020 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { | |
45b03d5e JM |
2021 | SWARN(silent, s, "clm-7000", |
2022 | "Detected readonly device, marking FS readonly"); | |
bd4c625c LT |
2023 | s->s_flags |= MS_RDONLY; |
2024 | } | |
2025 | args.objectid = REISERFS_ROOT_OBJECTID; | |
2026 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; | |
2027 | root_inode = | |
2028 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, | |
a228bf8f | 2029 | reiserfs_init_locked_inode, (void *)&args); |
bd4c625c | 2030 | if (!root_inode) { |
45b03d5e | 2031 | SWARN(silent, s, "jmacd-10", "get root inode failed"); |
9b467e6e | 2032 | goto error_unlocked; |
bd4c625c LT |
2033 | } |
2034 | ||
9b467e6e FW |
2035 | /* |
2036 | * This path assumed to be called with the BKL in the old times. | |
2037 | * Now we have inherited the big reiserfs lock from it and many | |
2038 | * reiserfs helpers called in the mount path and elsewhere require | |
2039 | * this lock to be held even if it's not always necessary. Let's be | |
2040 | * conservative and hold it early. The window can be reduced after | |
2041 | * careful review of the code. | |
2042 | */ | |
2043 | reiserfs_write_lock(s); | |
2044 | ||
bd4c625c LT |
2045 | if (root_inode->i_state & I_NEW) { |
2046 | reiserfs_read_locked_inode(root_inode, &args); | |
2047 | unlock_new_inode(root_inode); | |
2048 | } | |
2049 | ||
48fde701 AV |
2050 | s->s_root = d_make_root(root_inode); |
2051 | if (!s->s_root) | |
bd4c625c | 2052 | goto error; |
098297b2 | 2053 | /* define and initialize hash function */ |
bd4c625c LT |
2054 | sbi->s_hash_function = hash_function(s); |
2055 | if (sbi->s_hash_function == NULL) { | |
2056 | dput(s->s_root); | |
2057 | s->s_root = NULL; | |
2058 | goto error; | |
2059 | } | |
2060 | ||
2061 | if (is_reiserfs_3_5(rs) | |
2062 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) | |
a228bf8f | 2063 | set_bit(REISERFS_3_5, &sbi->s_properties); |
e1fabd3c | 2064 | else if (old_format) |
a228bf8f | 2065 | set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties); |
bd4c625c | 2066 | else |
a228bf8f | 2067 | set_bit(REISERFS_3_6, &sbi->s_properties); |
bd4c625c LT |
2068 | |
2069 | if (!(s->s_flags & MS_RDONLY)) { | |
2070 | ||
2071 | errval = journal_begin(&th, s, 1); | |
2072 | if (errval) { | |
2073 | dput(s->s_root); | |
2074 | s->s_root = NULL; | |
2075 | goto error; | |
2076 | } | |
2077 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
2078 | ||
2079 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
2080 | set_sb_fs_state(rs, 0); | |
2081 | ||
098297b2 JM |
2082 | /* |
2083 | * Clear out s_bmap_nr if it would wrap. We can handle this | |
cb680c1b JM |
2084 | * case, but older revisions can't. This will cause the |
2085 | * file system to fail mount on those older implementations, | |
098297b2 JM |
2086 | * avoiding corruption. -jeffm |
2087 | */ | |
cb680c1b JM |
2088 | if (bmap_would_wrap(reiserfs_bmap_count(s)) && |
2089 | sb_bmap_nr(rs) != 0) { | |
45b03d5e | 2090 | reiserfs_warning(s, "super-2030", "This file system " |
cb680c1b JM |
2091 | "claims to use %u bitmap blocks in " |
2092 | "its super block, but requires %u. " | |
2093 | "Clearing to zero.", sb_bmap_nr(rs), | |
2094 | reiserfs_bmap_count(s)); | |
2095 | ||
2096 | set_sb_bmap_nr(rs, 0); | |
2097 | } | |
2098 | ||
bd4c625c | 2099 | if (old_format_only(s)) { |
098297b2 JM |
2100 | /* |
2101 | * filesystem of format 3.5 either with standard | |
2102 | * or non-standard journal | |
2103 | */ | |
bd4c625c LT |
2104 | if (convert_reiserfs(s)) { |
2105 | /* and -o conv is given */ | |
2106 | if (!silent) | |
2107 | reiserfs_info(s, | |
2108 | "converting 3.5 filesystem to the 3.6 format"); | |
2109 | ||
2110 | if (is_reiserfs_3_5(rs)) | |
098297b2 JM |
2111 | /* |
2112 | * put magic string of 3.6 format. | |
2113 | * 2.2 will not be able to | |
2114 | * mount this filesystem anymore | |
2115 | */ | |
bd4c625c LT |
2116 | memcpy(rs->s_v1.s_magic, |
2117 | reiserfs_3_6_magic_string, | |
2118 | sizeof | |
2119 | (reiserfs_3_6_magic_string)); | |
2120 | ||
2121 | set_sb_version(rs, REISERFS_VERSION_2); | |
2122 | reiserfs_convert_objectid_map_v1(s); | |
a228bf8f JM |
2123 | set_bit(REISERFS_3_6, &sbi->s_properties); |
2124 | clear_bit(REISERFS_3_5, &sbi->s_properties); | |
bd4c625c LT |
2125 | } else if (!silent) { |
2126 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
2127 | } | |
702d21c6 JM |
2128 | } else |
2129 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
2130 | ||
bd4c625c | 2131 | |
09f1b80b | 2132 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
58d85426 | 2133 | errval = journal_end(&th); |
bd4c625c LT |
2134 | if (errval) { |
2135 | dput(s->s_root); | |
2136 | s->s_root = NULL; | |
2137 | goto error; | |
2138 | } | |
2139 | ||
4c05141d | 2140 | reiserfs_write_unlock(s); |
edcc37a0 AV |
2141 | if ((errval = reiserfs_lookup_privroot(s)) || |
2142 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
2143 | dput(s->s_root); |
2144 | s->s_root = NULL; | |
4c05141d | 2145 | goto error_unlocked; |
bd4c625c | 2146 | } |
4c05141d | 2147 | reiserfs_write_lock(s); |
bd4c625c | 2148 | |
098297b2 JM |
2149 | /* |
2150 | * look for files which were to be removed in previous session | |
2151 | */ | |
bd4c625c LT |
2152 | finish_unfinished(s); |
2153 | } else { | |
2154 | if (old_format_only(s) && !silent) { | |
2155 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
2156 | } | |
2157 | ||
4c05141d | 2158 | reiserfs_write_unlock(s); |
edcc37a0 AV |
2159 | if ((errval = reiserfs_lookup_privroot(s)) || |
2160 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
2161 | dput(s->s_root); |
2162 | s->s_root = NULL; | |
4c05141d | 2163 | goto error_unlocked; |
bd4c625c | 2164 | } |
4c05141d | 2165 | reiserfs_write_lock(s); |
bd4c625c | 2166 | } |
098297b2 JM |
2167 | /* |
2168 | * mark hash in super block: it could be unset. overwrite should be ok | |
2169 | */ | |
bd4c625c LT |
2170 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); |
2171 | ||
2172 | handle_attrs(s); | |
2173 | ||
2174 | reiserfs_proc_info_init(s); | |
2175 | ||
2176 | init_waitqueue_head(&(sbi->s_wait)); | |
2177 | spin_lock_init(&sbi->bitmap_lock); | |
2178 | ||
8ebc4232 FW |
2179 | reiserfs_write_unlock(s); |
2180 | ||
bd4c625c LT |
2181 | return (0); |
2182 | ||
00b44197 | 2183 | error: |
f32485be FW |
2184 | reiserfs_write_unlock(s); |
2185 | ||
2186 | error_unlocked: | |
2187 | /* kill the commit thread, free journal ram */ | |
2188 | if (jinit_done) { | |
2189 | reiserfs_write_lock(s); | |
bd4c625c | 2190 | journal_release_error(NULL, s); |
f32485be | 2191 | reiserfs_write_unlock(s); |
bd4c625c | 2192 | } |
5065227b | 2193 | |
fa0c5540 JS |
2194 | if (sbi->commit_wq) |
2195 | destroy_workqueue(sbi->commit_wq); | |
2196 | ||
033369d1 AB |
2197 | cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); |
2198 | ||
5065227b | 2199 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
2200 | if (SB_BUFFER_WITH_SB(s)) |
2201 | brelse(SB_BUFFER_WITH_SB(s)); | |
1da177e4 | 2202 | #ifdef CONFIG_QUOTA |
5065227b JM |
2203 | { |
2204 | int j; | |
aca60617 | 2205 | for (j = 0; j < REISERFS_MAXQUOTAS; j++) |
00b44197 | 2206 | kfree(qf_names[j]); |
bd4c625c | 2207 | } |
1da177e4 | 2208 | #endif |
833d304b | 2209 | kfree(sbi); |
1da177e4 | 2210 | |
bd4c625c LT |
2211 | s->s_fs_info = NULL; |
2212 | return errval; | |
1da177e4 LT |
2213 | } |
2214 | ||
726c3342 | 2215 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2216 | { |
726c3342 | 2217 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
bd4c625c LT |
2218 | |
2219 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); | |
2220 | buf->f_bfree = sb_free_blocks(rs); | |
2221 | buf->f_bavail = buf->f_bfree; | |
2222 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; | |
726c3342 | 2223 | buf->f_bsize = dentry->d_sb->s_blocksize; |
bd4c625c LT |
2224 | /* changed to accommodate gcc folks. */ |
2225 | buf->f_type = REISERFS_SUPER_MAGIC; | |
651d0623 CL |
2226 | buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); |
2227 | buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, | |
2228 | sizeof(rs->s_uuid)/2); | |
2229 | ||
bd4c625c | 2230 | return 0; |
1da177e4 LT |
2231 | } |
2232 | ||
2233 | #ifdef CONFIG_QUOTA | |
1da177e4 LT |
2234 | static int reiserfs_write_dquot(struct dquot *dquot) |
2235 | { | |
bd4c625c LT |
2236 | struct reiserfs_transaction_handle th; |
2237 | int ret, err; | |
d2d0395f | 2238 | int depth; |
bd4c625c LT |
2239 | |
2240 | reiserfs_write_lock(dquot->dq_sb); | |
2241 | ret = | |
2242 | journal_begin(&th, dquot->dq_sb, | |
2243 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
2244 | if (ret) | |
2245 | goto out; | |
d2d0395f | 2246 | depth = reiserfs_write_unlock_nested(dquot->dq_sb); |
bd4c625c | 2247 | ret = dquot_commit(dquot); |
d2d0395f | 2248 | reiserfs_write_lock_nested(dquot->dq_sb, depth); |
58d85426 | 2249 | err = journal_end(&th); |
bd4c625c LT |
2250 | if (!ret && err) |
2251 | ret = err; | |
7af11686 | 2252 | out: |
bd4c625c LT |
2253 | reiserfs_write_unlock(dquot->dq_sb); |
2254 | return ret; | |
1da177e4 LT |
2255 | } |
2256 | ||
2257 | static int reiserfs_acquire_dquot(struct dquot *dquot) | |
2258 | { | |
bd4c625c LT |
2259 | struct reiserfs_transaction_handle th; |
2260 | int ret, err; | |
d2d0395f | 2261 | int depth; |
bd4c625c LT |
2262 | |
2263 | reiserfs_write_lock(dquot->dq_sb); | |
2264 | ret = | |
2265 | journal_begin(&th, dquot->dq_sb, | |
2266 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
2267 | if (ret) | |
2268 | goto out; | |
d2d0395f | 2269 | depth = reiserfs_write_unlock_nested(dquot->dq_sb); |
bd4c625c | 2270 | ret = dquot_acquire(dquot); |
d2d0395f | 2271 | reiserfs_write_lock_nested(dquot->dq_sb, depth); |
58d85426 | 2272 | err = journal_end(&th); |
bd4c625c LT |
2273 | if (!ret && err) |
2274 | ret = err; | |
7af11686 | 2275 | out: |
bd4c625c LT |
2276 | reiserfs_write_unlock(dquot->dq_sb); |
2277 | return ret; | |
1da177e4 LT |
2278 | } |
2279 | ||
2280 | static int reiserfs_release_dquot(struct dquot *dquot) | |
2281 | { | |
bd4c625c LT |
2282 | struct reiserfs_transaction_handle th; |
2283 | int ret, err; | |
2284 | ||
2285 | reiserfs_write_lock(dquot->dq_sb); | |
2286 | ret = | |
2287 | journal_begin(&th, dquot->dq_sb, | |
2288 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
7af11686 | 2289 | reiserfs_write_unlock(dquot->dq_sb); |
9c3013e9 JK |
2290 | if (ret) { |
2291 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2292 | dquot_release(dquot); | |
bd4c625c | 2293 | goto out; |
9c3013e9 | 2294 | } |
bd4c625c | 2295 | ret = dquot_release(dquot); |
7af11686 | 2296 | reiserfs_write_lock(dquot->dq_sb); |
58d85426 | 2297 | err = journal_end(&th); |
bd4c625c LT |
2298 | if (!ret && err) |
2299 | ret = err; | |
bd4c625c | 2300 | reiserfs_write_unlock(dquot->dq_sb); |
7af11686 | 2301 | out: |
bd4c625c | 2302 | return ret; |
1da177e4 LT |
2303 | } |
2304 | ||
2305 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) | |
2306 | { | |
4506567b | 2307 | /* Are we journaling quotas? */ |
bd4c625c LT |
2308 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2309 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2310 | dquot_mark_dquot_dirty(dquot); | |
2311 | return reiserfs_write_dquot(dquot); | |
2312 | } else | |
2313 | return dquot_mark_dquot_dirty(dquot); | |
1da177e4 LT |
2314 | } |
2315 | ||
2316 | static int reiserfs_write_info(struct super_block *sb, int type) | |
2317 | { | |
bd4c625c LT |
2318 | struct reiserfs_transaction_handle th; |
2319 | int ret, err; | |
d2d0395f | 2320 | int depth; |
bd4c625c LT |
2321 | |
2322 | /* Data block + inode block */ | |
2323 | reiserfs_write_lock(sb); | |
2324 | ret = journal_begin(&th, sb, 2); | |
2325 | if (ret) | |
2326 | goto out; | |
d2d0395f | 2327 | depth = reiserfs_write_unlock_nested(sb); |
bd4c625c | 2328 | ret = dquot_commit_info(sb, type); |
d2d0395f | 2329 | reiserfs_write_lock_nested(sb, depth); |
58d85426 | 2330 | err = journal_end(&th); |
bd4c625c LT |
2331 | if (!ret && err) |
2332 | ret = err; | |
7af11686 | 2333 | out: |
bd4c625c LT |
2334 | reiserfs_write_unlock(sb); |
2335 | return ret; | |
1da177e4 LT |
2336 | } |
2337 | ||
2338 | /* | |
84de856e | 2339 | * Turn on quotas during mount time - we need to find the quota file and such... |
1da177e4 LT |
2340 | */ |
2341 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) | |
2342 | { | |
287a8095 CH |
2343 | return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
2344 | REISERFS_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2345 | } |
2346 | ||
2347 | /* | |
2348 | * Standard function to be called on quota_on | |
2349 | */ | |
bd4c625c | 2350 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 2351 | const struct path *path) |
1da177e4 | 2352 | { |
bd4c625c | 2353 | int err; |
d5dee5c3 | 2354 | struct inode *inode; |
5d4f7fdd | 2355 | struct reiserfs_transaction_handle th; |
c3aa0776 | 2356 | int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; |
bd4c625c | 2357 | |
b9e06ef2 JK |
2358 | reiserfs_write_lock(sb); |
2359 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { | |
2360 | err = -EINVAL; | |
2361 | goto out; | |
2362 | } | |
307ae18a | 2363 | |
bd4c625c | 2364 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 2365 | if (path->dentry->d_sb != sb) { |
77e69dac AV |
2366 | err = -EXDEV; |
2367 | goto out; | |
bd4c625c | 2368 | } |
2b0143b5 | 2369 | inode = d_inode(path->dentry); |
098297b2 JM |
2370 | /* |
2371 | * We must not pack tails for quota files on reiserfs for quota | |
2372 | * IO to work | |
2373 | */ | |
d5dee5c3 JK |
2374 | if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
2375 | err = reiserfs_unpack(inode, NULL); | |
2376 | if (err) { | |
45b03d5e JM |
2377 | reiserfs_warning(sb, "super-6520", |
2378 | "Unpacking tail of quota file failed" | |
d5dee5c3 | 2379 | " (%d). Cannot turn on quotas.", err); |
77e69dac AV |
2380 | err = -EINVAL; |
2381 | goto out; | |
d5dee5c3 JK |
2382 | } |
2383 | mark_inode_dirty(inode); | |
bd4c625c | 2384 | } |
5d4f7fdd JK |
2385 | /* Journaling quota? */ |
2386 | if (REISERFS_SB(sb)->s_qf_names[type]) { | |
2387 | /* Quotafile not of fs root? */ | |
f00c9e44 | 2388 | if (path->dentry->d_parent != sb->s_root) |
45b03d5e JM |
2389 | reiserfs_warning(sb, "super-6521", |
2390 | "Quota file not on filesystem root. " | |
bd4c625c | 2391 | "Journalled quota will not work."); |
5d4f7fdd JK |
2392 | } |
2393 | ||
2394 | /* | |
2395 | * When we journal data on quota file, we have to flush journal to see | |
2396 | * all updates to the file when we bypass pagecache... | |
2397 | */ | |
2398 | if (reiserfs_file_data_log(inode)) { | |
2399 | /* Just start temporary transaction and finish it */ | |
2400 | err = journal_begin(&th, sb, 1); | |
2401 | if (err) | |
77e69dac | 2402 | goto out; |
58d85426 | 2403 | err = journal_end_sync(&th); |
5d4f7fdd | 2404 | if (err) |
77e69dac | 2405 | goto out; |
5d4f7fdd | 2406 | } |
b9e06ef2 JK |
2407 | reiserfs_write_unlock(sb); |
2408 | return dquot_quota_on(sb, type, format_id, path); | |
77e69dac | 2409 | out: |
b9e06ef2 | 2410 | reiserfs_write_unlock(sb); |
77e69dac | 2411 | return err; |
1da177e4 LT |
2412 | } |
2413 | ||
098297b2 JM |
2414 | /* |
2415 | * Read data from quotafile - avoid pagecache and such because we cannot afford | |
1da177e4 | 2416 | * acquiring the locks... As quota files are never truncated and quota code |
25985edc | 2417 | * itself serializes the operations (and no one else should touch the files) |
098297b2 JM |
2418 | * we don't have to be afraid of races |
2419 | */ | |
1da177e4 LT |
2420 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, |
2421 | size_t len, loff_t off) | |
2422 | { | |
bd4c625c LT |
2423 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2424 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2425 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2426 | size_t toread; | |
2427 | struct buffer_head tmp_bh, *bh; | |
2428 | loff_t i_size = i_size_read(inode); | |
2429 | ||
2430 | if (off > i_size) | |
2431 | return 0; | |
2432 | if (off + len > i_size) | |
2433 | len = i_size - off; | |
2434 | toread = len; | |
2435 | while (toread > 0) { | |
2436 | tocopy = | |
2437 | sb->s_blocksize - offset < | |
2438 | toread ? sb->s_blocksize - offset : toread; | |
2439 | tmp_bh.b_state = 0; | |
098297b2 JM |
2440 | /* |
2441 | * Quota files are without tails so we can safely | |
2442 | * use this function | |
2443 | */ | |
bd4c625c LT |
2444 | reiserfs_write_lock(sb); |
2445 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); | |
2446 | reiserfs_write_unlock(sb); | |
2447 | if (err) | |
2448 | return err; | |
2449 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
2450 | memset(data, 0, tocopy); | |
2451 | else { | |
2452 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2453 | if (!bh) | |
2454 | return -EIO; | |
2455 | memcpy(data, bh->b_data + offset, tocopy); | |
2456 | brelse(bh); | |
2457 | } | |
2458 | offset = 0; | |
2459 | toread -= tocopy; | |
2460 | data += tocopy; | |
2461 | blk++; | |
2462 | } | |
2463 | return len; | |
1da177e4 LT |
2464 | } |
2465 | ||
098297b2 JM |
2466 | /* |
2467 | * Write to quotafile (we know the transaction is already started and has | |
2468 | * enough credits) | |
2469 | */ | |
1da177e4 LT |
2470 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, |
2471 | const char *data, size_t len, loff_t off) | |
2472 | { | |
bd4c625c LT |
2473 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2474 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2475 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2476 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; | |
2477 | size_t towrite = len; | |
2478 | struct buffer_head tmp_bh, *bh; | |
2479 | ||
9c3013e9 | 2480 | if (!current->journal_info) { |
53872ed0 | 2481 | printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n", |
9c3013e9 JK |
2482 | (unsigned long long)off, (unsigned long long)len); |
2483 | return -EIO; | |
2484 | } | |
bd4c625c LT |
2485 | while (towrite > 0) { |
2486 | tocopy = sb->s_blocksize - offset < towrite ? | |
2487 | sb->s_blocksize - offset : towrite; | |
2488 | tmp_bh.b_state = 0; | |
361d94a3 | 2489 | reiserfs_write_lock(sb); |
bd4c625c | 2490 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); |
361d94a3 | 2491 | reiserfs_write_unlock(sb); |
bd4c625c LT |
2492 | if (err) |
2493 | goto out; | |
2494 | if (offset || tocopy != sb->s_blocksize) | |
2495 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2496 | else | |
2497 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
2498 | if (!bh) { | |
2499 | err = -EIO; | |
2500 | goto out; | |
2501 | } | |
2502 | lock_buffer(bh); | |
2503 | memcpy(bh->b_data + offset, data, tocopy); | |
2504 | flush_dcache_page(bh->b_page); | |
2505 | set_buffer_uptodate(bh); | |
2506 | unlock_buffer(bh); | |
361d94a3 | 2507 | reiserfs_write_lock(sb); |
bd4c625c | 2508 | reiserfs_prepare_for_journal(sb, bh, 1); |
09f1b80b | 2509 | journal_mark_dirty(current->journal_info, bh); |
bd4c625c LT |
2510 | if (!journal_quota) |
2511 | reiserfs_add_ordered_list(inode, bh); | |
361d94a3 | 2512 | reiserfs_write_unlock(sb); |
bd4c625c LT |
2513 | brelse(bh); |
2514 | offset = 0; | |
2515 | towrite -= tocopy; | |
2516 | data += tocopy; | |
2517 | blk++; | |
2518 | } | |
9c3013e9 | 2519 | out: |
67f1648d | 2520 | if (len == towrite) |
bd4c625c LT |
2521 | return err; |
2522 | if (inode->i_size < off + len - towrite) | |
2523 | i_size_write(inode, off + len - towrite); | |
2524 | inode->i_version++; | |
02027d42 | 2525 | inode->i_mtime = inode->i_ctime = current_time(inode); |
bd4c625c | 2526 | mark_inode_dirty(inode); |
bd4c625c | 2527 | return len - towrite; |
1da177e4 LT |
2528 | } |
2529 | ||
2530 | #endif | |
2531 | ||
152a0836 | 2532 | static struct dentry *get_super_block(struct file_system_type *fs_type, |
454e2398 | 2533 | int flags, const char *dev_name, |
152a0836 | 2534 | void *data) |
1da177e4 | 2535 | { |
152a0836 | 2536 | return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); |
1da177e4 LT |
2537 | } |
2538 | ||
bd4c625c | 2539 | static int __init init_reiserfs_fs(void) |
1da177e4 LT |
2540 | { |
2541 | int ret; | |
2542 | ||
797d9016 JM |
2543 | ret = init_inodecache(); |
2544 | if (ret) | |
1da177e4 | 2545 | return ret; |
1da177e4 | 2546 | |
bd4c625c | 2547 | reiserfs_proc_info_global_init(); |
1da177e4 | 2548 | |
bd4c625c | 2549 | ret = register_filesystem(&reiserfs_fs_type); |
797d9016 JM |
2550 | if (ret) |
2551 | goto out; | |
1da177e4 | 2552 | |
797d9016 JM |
2553 | return 0; |
2554 | out: | |
bd4c625c LT |
2555 | reiserfs_proc_info_global_done(); |
2556 | destroy_inodecache(); | |
1da177e4 LT |
2557 | |
2558 | return ret; | |
2559 | } | |
2560 | ||
bd4c625c | 2561 | static void __exit exit_reiserfs_fs(void) |
1da177e4 | 2562 | { |
bd4c625c LT |
2563 | reiserfs_proc_info_global_done(); |
2564 | unregister_filesystem(&reiserfs_fs_type); | |
2565 | destroy_inodecache(); | |
1da177e4 LT |
2566 | } |
2567 | ||
2568 | struct file_system_type reiserfs_fs_type = { | |
bd4c625c LT |
2569 | .owner = THIS_MODULE, |
2570 | .name = "reiserfs", | |
152a0836 | 2571 | .mount = get_super_block, |
edc666e2 | 2572 | .kill_sb = reiserfs_kill_sb, |
bd4c625c | 2573 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 | 2574 | }; |
7f78e035 | 2575 | MODULE_ALIAS_FS("reiserfs"); |
1da177e4 | 2576 | |
bd4c625c LT |
2577 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
2578 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); | |
2579 | MODULE_LICENSE("GPL"); | |
1da177e4 | 2580 | |
bd4c625c LT |
2581 | module_init(init_reiserfs_fs); |
2582 | module_exit(exit_reiserfs_fs); |