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 | |
1da177e4 | 193 | /* look for uncompleted unlinks and truncates and complete them */ |
bd4c625c | 194 | static int finish_unfinished(struct super_block *s) |
1da177e4 | 195 | { |
bd4c625c LT |
196 | INITIALIZE_PATH(path); |
197 | struct cpu_key max_cpu_key, obj_key; | |
fb46f341 | 198 | struct reiserfs_key save_link_key, last_inode_key; |
bd4c625c LT |
199 | int retval = 0; |
200 | struct item_head *ih; | |
201 | struct buffer_head *bh; | |
202 | int item_pos; | |
203 | char *item; | |
204 | int done; | |
205 | struct inode *inode; | |
206 | int truncate; | |
1da177e4 | 207 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
208 | int i; |
209 | int ms_active_set; | |
aca60617 | 210 | int quota_enabled[REISERFS_MAXQUOTAS]; |
1da177e4 | 211 | #endif |
bd4c625c LT |
212 | |
213 | /* compose key to look for "save" links */ | |
214 | max_cpu_key.version = KEY_FORMAT_3_5; | |
215 | max_cpu_key.on_disk_key.k_dir_id = ~0U; | |
216 | max_cpu_key.on_disk_key.k_objectid = ~0U; | |
217 | set_cpu_key_k_offset(&max_cpu_key, ~0U); | |
218 | max_cpu_key.key_length = 3; | |
1da177e4 | 219 | |
fb46f341 LW |
220 | memset(&last_inode_key, 0, sizeof(last_inode_key)); |
221 | ||
1da177e4 | 222 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
223 | /* Needed for iput() to work correctly and not trash data */ |
224 | if (s->s_flags & MS_ACTIVE) { | |
225 | ms_active_set = 0; | |
226 | } else { | |
227 | ms_active_set = 1; | |
228 | s->s_flags |= MS_ACTIVE; | |
229 | } | |
230 | /* Turn on quotas so that they are updated correctly */ | |
aca60617 | 231 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
f4b113ae | 232 | quota_enabled[i] = 1; |
bd4c625c | 233 | if (REISERFS_SB(s)->s_qf_names[i]) { |
f4b113ae JK |
234 | int ret; |
235 | ||
236 | if (sb_has_quota_active(s, i)) { | |
237 | quota_enabled[i] = 0; | |
238 | continue; | |
239 | } | |
240 | ret = reiserfs_quota_on_mount(s, i); | |
bd4c625c | 241 | if (ret < 0) |
45b03d5e JM |
242 | reiserfs_warning(s, "reiserfs-2500", |
243 | "cannot turn on journaled " | |
244 | "quota: error %d", ret); | |
bd4c625c LT |
245 | } |
246 | } | |
1da177e4 | 247 | #endif |
bd4c625c LT |
248 | |
249 | done = 0; | |
250 | REISERFS_SB(s)->s_is_unlinked_ok = 1; | |
251 | while (!retval) { | |
d2d0395f | 252 | int depth; |
bd4c625c LT |
253 | retval = search_item(s, &max_cpu_key, &path); |
254 | if (retval != ITEM_NOT_FOUND) { | |
0030b645 JM |
255 | reiserfs_error(s, "vs-2140", |
256 | "search_by_key returned %d", retval); | |
bd4c625c LT |
257 | break; |
258 | } | |
259 | ||
260 | bh = get_last_bh(&path); | |
261 | item_pos = get_item_pos(&path); | |
262 | if (item_pos != B_NR_ITEMS(bh)) { | |
45b03d5e JM |
263 | reiserfs_warning(s, "vs-2060", |
264 | "wrong position found"); | |
bd4c625c LT |
265 | break; |
266 | } | |
267 | item_pos--; | |
4cf5f7ad | 268 | ih = item_head(bh, item_pos); |
bd4c625c LT |
269 | |
270 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) | |
271 | /* there are no "save" links anymore */ | |
272 | break; | |
273 | ||
274 | save_link_key = ih->ih_key; | |
275 | if (is_indirect_le_ih(ih)) | |
276 | truncate = 1; | |
277 | else | |
278 | truncate = 0; | |
279 | ||
280 | /* reiserfs_iget needs k_dirid and k_objectid only */ | |
4cf5f7ad | 281 | item = ih_item_body(bh, ih); |
bd4c625c LT |
282 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); |
283 | obj_key.on_disk_key.k_objectid = | |
284 | le32_to_cpu(ih->ih_key.k_objectid); | |
285 | obj_key.on_disk_key.k_offset = 0; | |
286 | obj_key.on_disk_key.k_type = 0; | |
287 | ||
288 | pathrelse(&path); | |
289 | ||
290 | inode = reiserfs_iget(s, &obj_key); | |
291 | if (!inode) { | |
098297b2 JM |
292 | /* |
293 | * the unlink almost completed, it just did not | |
294 | * manage to remove "save" link and release objectid | |
295 | */ | |
45b03d5e | 296 | reiserfs_warning(s, "vs-2180", "iget failed for %K", |
bd4c625c LT |
297 | &obj_key); |
298 | retval = remove_save_link_only(s, &save_link_key, 1); | |
299 | continue; | |
300 | } | |
301 | ||
302 | if (!truncate && inode->i_nlink) { | |
303 | /* file is not unlinked */ | |
45b03d5e JM |
304 | reiserfs_warning(s, "vs-2185", |
305 | "file %K is not unlinked", | |
bd4c625c LT |
306 | &obj_key); |
307 | retval = remove_save_link_only(s, &save_link_key, 0); | |
308 | continue; | |
309 | } | |
d2d0395f | 310 | depth = reiserfs_write_unlock_nested(inode->i_sb); |
871a2931 | 311 | dquot_initialize(inode); |
d2d0395f | 312 | reiserfs_write_lock_nested(inode->i_sb, depth); |
bd4c625c LT |
313 | |
314 | if (truncate && S_ISDIR(inode->i_mode)) { | |
098297b2 JM |
315 | /* |
316 | * We got a truncate request for a dir which | |
317 | * is impossible. The only imaginable way is to | |
318 | * execute unfinished truncate request then boot | |
319 | * into old kernel, remove the file and create dir | |
320 | * with the same key. | |
321 | */ | |
45b03d5e JM |
322 | reiserfs_warning(s, "green-2101", |
323 | "impossible truncate on a " | |
324 | "directory %k. Please report", | |
bd4c625c LT |
325 | INODE_PKEY(inode)); |
326 | retval = remove_save_link_only(s, &save_link_key, 0); | |
327 | truncate = 0; | |
328 | iput(inode); | |
329 | continue; | |
330 | } | |
331 | ||
332 | if (truncate) { | |
333 | REISERFS_I(inode)->i_flags |= | |
334 | i_link_saved_truncate_mask; | |
098297b2 JM |
335 | /* |
336 | * not completed truncate found. New size was | |
337 | * committed together with "save" link | |
338 | */ | |
53872ed0 | 339 | reiserfs_info(s, "Truncating %k to %lld ..", |
bd4c625c | 340 | INODE_PKEY(inode), inode->i_size); |
098297b2 JM |
341 | |
342 | /* don't update modification time */ | |
343 | reiserfs_truncate_file(inode, 0); | |
344 | ||
bd4c625c LT |
345 | retval = remove_save_link(inode, truncate); |
346 | } else { | |
347 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
348 | /* not completed unlink (rmdir) found */ | |
349 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); | |
fb46f341 LW |
350 | if (memcmp(&last_inode_key, INODE_PKEY(inode), |
351 | sizeof(last_inode_key))){ | |
352 | last_inode_key = *INODE_PKEY(inode); | |
353 | /* removal gets completed in iput */ | |
354 | retval = 0; | |
355 | } else { | |
45b03d5e JM |
356 | reiserfs_warning(s, "super-2189", "Dead loop " |
357 | "in finish_unfinished " | |
358 | "detected, just remove " | |
359 | "save link\n"); | |
fb46f341 LW |
360 | retval = remove_save_link_only(s, |
361 | &save_link_key, 0); | |
362 | } | |
bd4c625c LT |
363 | } |
364 | ||
365 | iput(inode); | |
366 | printk("done\n"); | |
367 | done++; | |
368 | } | |
369 | REISERFS_SB(s)->s_is_unlinked_ok = 0; | |
370 | ||
1da177e4 | 371 | #ifdef CONFIG_QUOTA |
bd4c625c | 372 | /* Turn quotas off */ |
d2d0395f | 373 | reiserfs_write_unlock(s); |
aca60617 | 374 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
f4b113ae | 375 | if (sb_dqopt(s)->files[i] && quota_enabled[i]) |
287a8095 | 376 | dquot_quota_off(s, i); |
bd4c625c | 377 | } |
d2d0395f | 378 | reiserfs_write_lock(s); |
bd4c625c LT |
379 | if (ms_active_set) |
380 | /* Restore the flag back */ | |
381 | s->s_flags &= ~MS_ACTIVE; | |
1da177e4 | 382 | #endif |
bd4c625c LT |
383 | pathrelse(&path); |
384 | if (done) | |
385 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " | |
386 | "Completed\n", done); | |
387 | return retval; | |
1da177e4 | 388 | } |
bd4c625c | 389 | |
098297b2 JM |
390 | /* |
391 | * to protect file being unlinked from getting lost we "safe" link files | |
392 | * being unlinked. This link will be deleted in the same transaction with last | |
393 | * item of file. mounting the filesystem we scan all these links and remove | |
394 | * files which almost got lost | |
395 | */ | |
bd4c625c LT |
396 | void add_save_link(struct reiserfs_transaction_handle *th, |
397 | struct inode *inode, int truncate) | |
1da177e4 | 398 | { |
bd4c625c LT |
399 | INITIALIZE_PATH(path); |
400 | int retval; | |
401 | struct cpu_key key; | |
402 | struct item_head ih; | |
403 | __le32 link; | |
404 | ||
405 | BUG_ON(!th->t_trans_id); | |
406 | ||
407 | /* file can only get one "save link" of each kind */ | |
408 | RFALSE(truncate && | |
409 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), | |
410 | "saved link already exists for truncated inode %lx", | |
411 | (long)inode->i_ino); | |
412 | RFALSE(!truncate && | |
413 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), | |
414 | "saved link already exists for unlinked inode %lx", | |
415 | (long)inode->i_ino); | |
416 | ||
417 | /* setup key of "save" link */ | |
418 | key.version = KEY_FORMAT_3_5; | |
419 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; | |
420 | key.on_disk_key.k_objectid = inode->i_ino; | |
421 | if (!truncate) { | |
422 | /* unlink, rmdir, rename */ | |
423 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); | |
424 | set_cpu_key_k_type(&key, TYPE_DIRECT); | |
425 | ||
426 | /* item head of "safe" link */ | |
427 | make_le_item_head(&ih, &key, key.version, | |
428 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, | |
429 | 4 /*length */ , 0xffff /*free space */ ); | |
430 | } else { | |
431 | /* truncate */ | |
432 | if (S_ISDIR(inode->i_mode)) | |
45b03d5e JM |
433 | reiserfs_warning(inode->i_sb, "green-2102", |
434 | "Adding a truncate savelink for " | |
435 | "a directory %k! Please report", | |
bd4c625c LT |
436 | INODE_PKEY(inode)); |
437 | set_cpu_key_k_offset(&key, 1); | |
438 | set_cpu_key_k_type(&key, TYPE_INDIRECT); | |
439 | ||
440 | /* item head of "safe" link */ | |
441 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, | |
442 | 4 /*length */ , 0 /*free space */ ); | |
443 | } | |
444 | key.key_length = 3; | |
445 | ||
446 | /* look for its place in the tree */ | |
447 | retval = search_item(inode->i_sb, &key, &path); | |
448 | if (retval != ITEM_NOT_FOUND) { | |
449 | if (retval != -ENOSPC) | |
0030b645 JM |
450 | reiserfs_error(inode->i_sb, "vs-2100", |
451 | "search_by_key (%K) returned %d", &key, | |
452 | retval); | |
bd4c625c LT |
453 | pathrelse(&path); |
454 | return; | |
455 | } | |
1da177e4 | 456 | |
bd4c625c LT |
457 | /* body of "save" link */ |
458 | link = INODE_PKEY(inode)->k_dir_id; | |
459 | ||
25985edc | 460 | /* put "save" link into tree, don't charge quota to anyone */ |
bd4c625c LT |
461 | retval = |
462 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); | |
463 | if (retval) { | |
464 | if (retval != -ENOSPC) | |
0030b645 JM |
465 | reiserfs_error(inode->i_sb, "vs-2120", |
466 | "insert_item returned %d", retval); | |
bd4c625c LT |
467 | } else { |
468 | if (truncate) | |
469 | REISERFS_I(inode)->i_flags |= | |
470 | i_link_saved_truncate_mask; | |
471 | else | |
472 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
473 | } | |
474 | } | |
1da177e4 LT |
475 | |
476 | /* this opens transaction unlike add_save_link */ | |
bd4c625c | 477 | int remove_save_link(struct inode *inode, int truncate) |
1da177e4 | 478 | { |
bd4c625c LT |
479 | struct reiserfs_transaction_handle th; |
480 | struct reiserfs_key key; | |
481 | int err; | |
482 | ||
483 | /* we are going to do one balancing only */ | |
484 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
485 | if (err) | |
486 | return err; | |
487 | ||
488 | /* setup key of "save" link */ | |
489 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); | |
490 | key.k_objectid = INODE_PKEY(inode)->k_objectid; | |
491 | if (!truncate) { | |
492 | /* unlink, rmdir, rename */ | |
493 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, | |
494 | 1 + inode->i_sb->s_blocksize); | |
495 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); | |
496 | } else { | |
497 | /* truncate */ | |
498 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); | |
499 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); | |
500 | } | |
1da177e4 | 501 | |
bd4c625c LT |
502 | if ((truncate && |
503 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || | |
504 | (!truncate && | |
505 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) | |
506 | /* don't take quota bytes from anywhere */ | |
507 | reiserfs_delete_solid_item(&th, NULL, &key); | |
508 | if (!truncate) { | |
509 | reiserfs_release_objectid(&th, inode->i_ino); | |
510 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; | |
511 | } else | |
512 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; | |
513 | ||
58d85426 | 514 | return journal_end(&th); |
bd4c625c | 515 | } |
1da177e4 | 516 | |
edc666e2 | 517 | static void reiserfs_kill_sb(struct super_block *s) |
1da177e4 | 518 | { |
edc666e2 | 519 | if (REISERFS_SB(s)) { |
672fe15d | 520 | reiserfs_proc_info_done(s); |
a9e36da6 JM |
521 | /* |
522 | * Force any pending inode evictions to occur now. Any | |
523 | * inodes to be removed that have extended attributes | |
524 | * associated with them need to clean them up before | |
525 | * we can release the extended attribute root dentries. | |
526 | * shrink_dcache_for_umount will BUG if we don't release | |
527 | * those before it's called so ->put_super is too late. | |
528 | */ | |
529 | shrink_dcache_sb(s); | |
530 | ||
531 | dput(REISERFS_SB(s)->xattr_root); | |
532 | REISERFS_SB(s)->xattr_root = NULL; | |
533 | dput(REISERFS_SB(s)->priv_root); | |
534 | REISERFS_SB(s)->priv_root = NULL; | |
bd4c625c LT |
535 | } |
536 | ||
edc666e2 DH |
537 | kill_block_super(s); |
538 | } | |
539 | ||
540 | static void reiserfs_put_super(struct super_block *s) | |
541 | { | |
542 | struct reiserfs_transaction_handle th; | |
543 | th.t_trans_id = 0; | |
bd4c625c | 544 | |
e0ccfd95 CH |
545 | dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
546 | ||
8ebc4232 | 547 | reiserfs_write_lock(s); |
6cfd0148 | 548 | |
098297b2 JM |
549 | /* |
550 | * change file system state to current state if it was mounted | |
551 | * with read-write permissions | |
552 | */ | |
bd4c625c LT |
553 | if (!(s->s_flags & MS_RDONLY)) { |
554 | if (!journal_begin(&th, s, 10)) { | |
555 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
556 | 1); | |
557 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), | |
558 | REISERFS_SB(s)->s_mount_state); | |
09f1b80b | 559 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
bd4c625c LT |
560 | } |
561 | } | |
562 | ||
098297b2 JM |
563 | /* |
564 | * note, journal_release checks for readonly mount, and can | |
565 | * decide not to do a journal_end | |
bd4c625c LT |
566 | */ |
567 | journal_release(&th, s); | |
568 | ||
5065227b | 569 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
570 | |
571 | brelse(SB_BUFFER_WITH_SB(s)); | |
572 | ||
573 | print_statistics(s); | |
574 | ||
bd4c625c | 575 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
45b03d5e | 576 | reiserfs_warning(s, "green-2005", "reserved blocks left %d", |
bd4c625c LT |
577 | REISERFS_SB(s)->reserved_blocks); |
578 | } | |
579 | ||
8ebc4232 FW |
580 | reiserfs_write_unlock(s); |
581 | mutex_destroy(&REISERFS_SB(s)->lock); | |
797d9016 | 582 | destroy_workqueue(REISERFS_SB(s)->commit_wq); |
bd4c625c LT |
583 | kfree(s->s_fs_info); |
584 | s->s_fs_info = NULL; | |
1da177e4 LT |
585 | } |
586 | ||
e18b890b | 587 | static struct kmem_cache *reiserfs_inode_cachep; |
1da177e4 LT |
588 | |
589 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) | |
590 | { | |
591 | struct reiserfs_inode_info *ei; | |
89bfae43 | 592 | ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
593 | if (!ei) |
594 | return NULL; | |
0e4f6a79 AV |
595 | atomic_set(&ei->openers, 0); |
596 | mutex_init(&ei->tailpack); | |
53873638 JK |
597 | #ifdef CONFIG_QUOTA |
598 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); | |
599 | #endif | |
600 | ||
1da177e4 LT |
601 | return &ei->vfs_inode; |
602 | } | |
603 | ||
fa0d7e3d | 604 | static void reiserfs_i_callback(struct rcu_head *head) |
1da177e4 | 605 | { |
fa0d7e3d | 606 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
607 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); |
608 | } | |
609 | ||
fa0d7e3d NP |
610 | static void reiserfs_destroy_inode(struct inode *inode) |
611 | { | |
612 | call_rcu(&inode->i_rcu, reiserfs_i_callback); | |
613 | } | |
614 | ||
51cc5068 | 615 | static void init_once(void *foo) |
1da177e4 | 616 | { |
bd4c625c | 617 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
1da177e4 | 618 | |
a35afb83 CL |
619 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
620 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 621 | } |
bd4c625c | 622 | |
31e14368 | 623 | static int __init init_inodecache(void) |
1da177e4 LT |
624 | { |
625 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", | |
bd4c625c LT |
626 | sizeof(struct |
627 | reiserfs_inode_info), | |
fffb60f9 PJ |
628 | 0, (SLAB_RECLAIM_ACCOUNT| |
629 | SLAB_MEM_SPREAD), | |
20c2df83 | 630 | init_once); |
1da177e4 LT |
631 | if (reiserfs_inode_cachep == NULL) |
632 | return -ENOMEM; | |
633 | return 0; | |
634 | } | |
635 | ||
636 | static void destroy_inodecache(void) | |
637 | { | |
8c0a8537 KS |
638 | /* |
639 | * Make sure all delayed rcu free inodes are flushed before we | |
640 | * destroy cache. | |
641 | */ | |
642 | rcu_barrier(); | |
1a1d92c1 | 643 | kmem_cache_destroy(reiserfs_inode_cachep); |
1da177e4 LT |
644 | } |
645 | ||
646 | /* we don't mark inodes dirty, we just log them */ | |
aa385729 | 647 | static void reiserfs_dirty_inode(struct inode *inode, int flags) |
bd4c625c LT |
648 | { |
649 | struct reiserfs_transaction_handle th; | |
650 | ||
651 | int err = 0; | |
dc8f6d89 | 652 | |
bd4c625c | 653 | if (inode->i_sb->s_flags & MS_RDONLY) { |
45b03d5e JM |
654 | reiserfs_warning(inode->i_sb, "clm-6006", |
655 | "writing inode %lu on readonly FS", | |
bd4c625c LT |
656 | inode->i_ino); |
657 | return; | |
658 | } | |
278f6679 | 659 | reiserfs_write_lock(inode->i_sb); |
bd4c625c | 660 | |
098297b2 JM |
661 | /* |
662 | * this is really only used for atime updates, so they don't have | |
663 | * to be included in O_SYNC or fsync | |
bd4c625c LT |
664 | */ |
665 | err = journal_begin(&th, inode->i_sb, 1); | |
dc8f6d89 FW |
666 | if (err) |
667 | goto out; | |
668 | ||
bd4c625c | 669 | reiserfs_update_sd(&th, inode); |
58d85426 | 670 | journal_end(&th); |
dc8f6d89 FW |
671 | |
672 | out: | |
278f6679 | 673 | reiserfs_write_unlock(inode->i_sb); |
1da177e4 LT |
674 | } |
675 | ||
c3aa0776 JK |
676 | static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) |
677 | { | |
678 | struct super_block *s = root->d_sb; | |
679 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
680 | long opts = REISERFS_SB(s)->s_mount_opt; | |
681 | ||
682 | if (opts & (1 << REISERFS_LARGETAIL)) | |
683 | seq_puts(seq, ",tails=on"); | |
684 | else if (!(opts & (1 << REISERFS_SMALLTAIL))) | |
685 | seq_puts(seq, ",notail"); | |
686 | /* tails=small is default so we don't show it */ | |
687 | ||
688 | if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) | |
689 | seq_puts(seq, ",barrier=none"); | |
690 | /* barrier=flush is default so we don't show it */ | |
691 | ||
692 | if (opts & (1 << REISERFS_ERROR_CONTINUE)) | |
693 | seq_puts(seq, ",errors=continue"); | |
694 | else if (opts & (1 << REISERFS_ERROR_PANIC)) | |
695 | seq_puts(seq, ",errors=panic"); | |
696 | /* errors=ro is default so we don't show it */ | |
697 | ||
698 | if (opts & (1 << REISERFS_DATA_LOG)) | |
699 | seq_puts(seq, ",data=journal"); | |
700 | else if (opts & (1 << REISERFS_DATA_WRITEBACK)) | |
701 | seq_puts(seq, ",data=writeback"); | |
702 | /* data=ordered is default so we don't show it */ | |
703 | ||
704 | if (opts & (1 << REISERFS_ATTRS)) | |
705 | seq_puts(seq, ",attrs"); | |
706 | ||
707 | if (opts & (1 << REISERFS_XATTRS_USER)) | |
708 | seq_puts(seq, ",user_xattr"); | |
709 | ||
710 | if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) | |
711 | seq_puts(seq, ",expose_privroot"); | |
712 | ||
713 | if (opts & (1 << REISERFS_POSIXACL)) | |
714 | seq_puts(seq, ",acl"); | |
715 | ||
716 | if (REISERFS_SB(s)->s_jdev) | |
a068acf2 | 717 | seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev); |
c3aa0776 JK |
718 | |
719 | if (journal->j_max_commit_age != journal->j_default_max_commit_age) | |
720 | seq_printf(seq, ",commit=%d", journal->j_max_commit_age); | |
721 | ||
722 | #ifdef CONFIG_QUOTA | |
723 | if (REISERFS_SB(s)->s_qf_names[USRQUOTA]) | |
a068acf2 KC |
724 | seq_show_option(seq, "usrjquota", |
725 | REISERFS_SB(s)->s_qf_names[USRQUOTA]); | |
c3aa0776 JK |
726 | else if (opts & (1 << REISERFS_USRQUOTA)) |
727 | seq_puts(seq, ",usrquota"); | |
728 | if (REISERFS_SB(s)->s_qf_names[GRPQUOTA]) | |
a068acf2 KC |
729 | seq_show_option(seq, "grpjquota", |
730 | REISERFS_SB(s)->s_qf_names[GRPQUOTA]); | |
c3aa0776 JK |
731 | else if (opts & (1 << REISERFS_GRPQUOTA)) |
732 | seq_puts(seq, ",grpquota"); | |
733 | if (REISERFS_SB(s)->s_jquota_fmt) { | |
734 | if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD) | |
735 | seq_puts(seq, ",jqfmt=vfsold"); | |
736 | else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0) | |
737 | seq_puts(seq, ",jqfmt=vfsv0"); | |
738 | } | |
739 | #endif | |
740 | ||
741 | /* Block allocator options */ | |
742 | if (opts & (1 << REISERFS_NO_BORDER)) | |
743 | seq_puts(seq, ",block-allocator=noborder"); | |
744 | if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) | |
745 | seq_puts(seq, ",block-allocator=no_unhashed_relocation"); | |
746 | if (opts & (1 << REISERFS_HASHED_RELOCATION)) | |
747 | seq_puts(seq, ",block-allocator=hashed_relocation"); | |
748 | if (opts & (1 << REISERFS_TEST4)) | |
749 | seq_puts(seq, ",block-allocator=test4"); | |
750 | show_alloc_options(seq, s); | |
751 | return 0; | |
752 | } | |
753 | ||
1da177e4 | 754 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
755 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
756 | size_t, loff_t); | |
757 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, | |
758 | loff_t); | |
53873638 JK |
759 | |
760 | static struct dquot **reiserfs_get_dquots(struct inode *inode) | |
761 | { | |
762 | return REISERFS_I(inode)->i_dquot; | |
763 | } | |
1da177e4 LT |
764 | #endif |
765 | ||
ee9b6d61 | 766 | static const struct super_operations reiserfs_sops = { |
bd4c625c LT |
767 | .alloc_inode = reiserfs_alloc_inode, |
768 | .destroy_inode = reiserfs_destroy_inode, | |
769 | .write_inode = reiserfs_write_inode, | |
770 | .dirty_inode = reiserfs_dirty_inode, | |
845a2cc0 | 771 | .evict_inode = reiserfs_evict_inode, |
bd4c625c | 772 | .put_super = reiserfs_put_super, |
bd4c625c | 773 | .sync_fs = reiserfs_sync_fs, |
c4be0c1d TS |
774 | .freeze_fs = reiserfs_freeze, |
775 | .unfreeze_fs = reiserfs_unfreeze, | |
bd4c625c LT |
776 | .statfs = reiserfs_statfs, |
777 | .remount_fs = reiserfs_remount, | |
c3aa0776 | 778 | .show_options = reiserfs_show_options, |
1da177e4 | 779 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
780 | .quota_read = reiserfs_quota_read, |
781 | .quota_write = reiserfs_quota_write, | |
53873638 | 782 | .get_dquots = reiserfs_get_dquots, |
1da177e4 LT |
783 | #endif |
784 | }; | |
785 | ||
786 | #ifdef CONFIG_QUOTA | |
787 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
788 | ||
1da177e4 LT |
789 | static int reiserfs_write_dquot(struct dquot *); |
790 | static int reiserfs_acquire_dquot(struct dquot *); | |
791 | static int reiserfs_release_dquot(struct dquot *); | |
792 | static int reiserfs_mark_dquot_dirty(struct dquot *); | |
793 | static int reiserfs_write_info(struct super_block *, int); | |
f00c9e44 | 794 | static int reiserfs_quota_on(struct super_block *, int, int, struct path *); |
1da177e4 | 795 | |
61e225dc | 796 | static const struct dquot_operations reiserfs_quota_operations = { |
bd4c625c LT |
797 | .write_dquot = reiserfs_write_dquot, |
798 | .acquire_dquot = reiserfs_acquire_dquot, | |
799 | .release_dquot = reiserfs_release_dquot, | |
800 | .mark_dirty = reiserfs_mark_dquot_dirty, | |
801 | .write_info = reiserfs_write_info, | |
4103003b JK |
802 | .alloc_dquot = dquot_alloc, |
803 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
804 | }; |
805 | ||
0d54b217 | 806 | static const struct quotactl_ops reiserfs_qctl_operations = { |
bd4c625c | 807 | .quota_on = reiserfs_quota_on, |
287a8095 CH |
808 | .quota_off = dquot_quota_off, |
809 | .quota_sync = dquot_quota_sync, | |
0a240339 | 810 | .get_state = dquot_get_state, |
287a8095 CH |
811 | .set_info = dquot_set_dqinfo, |
812 | .get_dqblk = dquot_get_dqblk, | |
813 | .set_dqblk = dquot_set_dqblk, | |
1da177e4 LT |
814 | }; |
815 | #endif | |
816 | ||
39655164 | 817 | static const struct export_operations reiserfs_export_ops = { |
bd4c625c | 818 | .encode_fh = reiserfs_encode_fh, |
be55caf1 CH |
819 | .fh_to_dentry = reiserfs_fh_to_dentry, |
820 | .fh_to_parent = reiserfs_fh_to_parent, | |
bd4c625c | 821 | .get_parent = reiserfs_get_parent, |
bd4c625c | 822 | }; |
1da177e4 | 823 | |
098297b2 JM |
824 | /* |
825 | * this struct is used in reiserfs_getopt () for containing the value for | |
826 | * those mount options that have values rather than being toggles. | |
827 | */ | |
1da177e4 | 828 | typedef struct { |
bd4c625c | 829 | char *value; |
098297b2 JM |
830 | /* |
831 | * bitmask which is to set on mount_options bitmask | |
832 | * when this value is found, 0 is no bits are to be changed. | |
833 | */ | |
834 | int setmask; | |
835 | /* | |
836 | * bitmask which is to clear on mount_options bitmask | |
837 | * when this value is found, 0 is no bits are to be changed. | |
838 | * This is applied BEFORE setmask | |
839 | */ | |
840 | int clrmask; | |
1da177e4 LT |
841 | } arg_desc_t; |
842 | ||
843 | /* Set this bit in arg_required to allow empty arguments */ | |
844 | #define REISERFS_OPT_ALLOWEMPTY 31 | |
845 | ||
098297b2 JM |
846 | /* |
847 | * this struct is used in reiserfs_getopt() for describing the | |
848 | * set of reiserfs mount options | |
849 | */ | |
1da177e4 | 850 | typedef struct { |
bd4c625c | 851 | char *option_name; |
098297b2 JM |
852 | |
853 | /* 0 if argument is not required, not 0 otherwise */ | |
854 | int arg_required; | |
855 | ||
856 | /* list of values accepted by an option */ | |
857 | const arg_desc_t *values; | |
858 | ||
859 | /* | |
860 | * bitmask which is to set on mount_options bitmask | |
861 | * when this value is found, 0 is no bits are to be changed. | |
862 | */ | |
863 | int setmask; | |
864 | ||
865 | /* | |
866 | * bitmask which is to clear on mount_options bitmask | |
867 | * when this value is found, 0 is no bits are to be changed. | |
868 | * This is applied BEFORE setmask | |
869 | */ | |
870 | int clrmask; | |
1da177e4 LT |
871 | } opt_desc_t; |
872 | ||
873 | /* possible values for -o data= */ | |
874 | static const arg_desc_t logging_mode[] = { | |
bd4c625c LT |
875 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
876 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, | |
877 | {"journal", 1 << REISERFS_DATA_LOG, | |
878 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, | |
879 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, | |
880 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, | |
cd02b966 | 881 | {.value = NULL} |
1da177e4 LT |
882 | }; |
883 | ||
884 | /* possible values for -o barrier= */ | |
885 | static const arg_desc_t barrier_mode[] = { | |
bd4c625c LT |
886 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
887 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, | |
cd02b966 | 888 | {.value = NULL} |
1da177e4 LT |
889 | }; |
890 | ||
098297b2 JM |
891 | /* |
892 | * possible values for "-o block-allocator=" and bits which are to be set in | |
893 | * s_mount_opt of reiserfs specific part of in-core super block | |
894 | */ | |
1da177e4 | 895 | static const arg_desc_t balloc[] = { |
bd4c625c LT |
896 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
897 | {"border", 0, 1 << REISERFS_NO_BORDER}, | |
898 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, | |
899 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, | |
900 | {"test4", 1 << REISERFS_TEST4, 0}, | |
901 | {"notest4", 0, 1 << REISERFS_TEST4}, | |
902 | {NULL, 0, 0} | |
1da177e4 LT |
903 | }; |
904 | ||
905 | static const arg_desc_t tails[] = { | |
bd4c625c LT |
906 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
907 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
908 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, | |
909 | {NULL, 0, 0} | |
1da177e4 LT |
910 | }; |
911 | ||
912 | static const arg_desc_t error_actions[] = { | |
bd4c625c LT |
913 | {"panic", 1 << REISERFS_ERROR_PANIC, |
914 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, | |
915 | {"ro-remount", 1 << REISERFS_ERROR_RO, | |
916 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, | |
1da177e4 | 917 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
bd4c625c LT |
918 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
919 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, | |
1da177e4 | 920 | #endif |
bd4c625c | 921 | {NULL, 0, 0}, |
1da177e4 LT |
922 | }; |
923 | ||
098297b2 JM |
924 | /* |
925 | * proceed only one option from a list *cur - string containing of mount | |
926 | * options | |
927 | * opts - array of options which are accepted | |
928 | * opt_arg - if option is found and requires an argument and if it is specifed | |
929 | * in the input - pointer to the argument is stored here | |
930 | * bit_flags - if option requires to set a certain bit - it is set here | |
931 | * return -1 if unknown option is found, opt->arg_required otherwise | |
932 | */ | |
bd4c625c LT |
933 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
934 | char **opt_arg, unsigned long *bit_flags) | |
1da177e4 | 935 | { |
bd4c625c | 936 | char *p; |
098297b2 JM |
937 | /* |
938 | * foo=bar, | |
939 | * ^ ^ ^ | |
940 | * | | +-- option_end | |
941 | * | +-- arg_start | |
942 | * +-- option_start | |
bd4c625c LT |
943 | */ |
944 | const opt_desc_t *opt; | |
945 | const arg_desc_t *arg; | |
946 | ||
947 | p = *cur; | |
948 | ||
949 | /* assume argument cannot contain commas */ | |
950 | *cur = strchr(p, ','); | |
951 | if (*cur) { | |
952 | *(*cur) = '\0'; | |
953 | (*cur)++; | |
954 | } | |
955 | ||
956 | if (!strncmp(p, "alloc=", 6)) { | |
098297b2 JM |
957 | /* |
958 | * Ugly special case, probably we should redo options | |
959 | * parser so that it can understand several arguments for | |
960 | * some options, also so that it can fill several bitfields | |
961 | * with option values. | |
962 | */ | |
bd4c625c LT |
963 | if (reiserfs_parse_alloc_options(s, p + 6)) { |
964 | return -1; | |
965 | } else { | |
966 | return 0; | |
967 | } | |
968 | } | |
969 | ||
970 | /* for every option in the list */ | |
971 | for (opt = opts; opt->option_name; opt++) { | |
972 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { | |
973 | if (bit_flags) { | |
974 | if (opt->clrmask == | |
975 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
976 | reiserfs_warning(s, "super-6500", |
977 | "%s not supported.\n", | |
bd4c625c LT |
978 | p); |
979 | else | |
980 | *bit_flags &= ~opt->clrmask; | |
981 | if (opt->setmask == | |
982 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
983 | reiserfs_warning(s, "super-6501", |
984 | "%s not supported.\n", | |
bd4c625c LT |
985 | p); |
986 | else | |
987 | *bit_flags |= opt->setmask; | |
988 | } | |
989 | break; | |
990 | } | |
991 | } | |
992 | if (!opt->option_name) { | |
45b03d5e JM |
993 | reiserfs_warning(s, "super-6502", |
994 | "unknown mount option \"%s\"", p); | |
bd4c625c LT |
995 | return -1; |
996 | } | |
997 | ||
998 | p += strlen(opt->option_name); | |
999 | switch (*p) { | |
1000 | case '=': | |
1001 | if (!opt->arg_required) { | |
45b03d5e JM |
1002 | reiserfs_warning(s, "super-6503", |
1003 | "the option \"%s\" does not " | |
1004 | "require an argument\n", | |
bd4c625c LT |
1005 | opt->option_name); |
1006 | return -1; | |
1007 | } | |
1008 | break; | |
1009 | ||
1010 | case 0: | |
1011 | if (opt->arg_required) { | |
45b03d5e JM |
1012 | reiserfs_warning(s, "super-6504", |
1013 | "the option \"%s\" requires an " | |
1014 | "argument\n", opt->option_name); | |
bd4c625c LT |
1015 | return -1; |
1016 | } | |
1017 | break; | |
1018 | default: | |
45b03d5e JM |
1019 | reiserfs_warning(s, "super-6505", |
1020 | "head of option \"%s\" is only correct\n", | |
bd4c625c LT |
1021 | opt->option_name); |
1022 | return -1; | |
1023 | } | |
1024 | ||
098297b2 JM |
1025 | /* |
1026 | * move to the argument, or to next option if argument is not | |
1027 | * required | |
1028 | */ | |
bd4c625c LT |
1029 | p++; |
1030 | ||
1031 | if (opt->arg_required | |
1032 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) | |
1033 | && !strlen(p)) { | |
1034 | /* this catches "option=," if not allowed */ | |
45b03d5e JM |
1035 | reiserfs_warning(s, "super-6506", |
1036 | "empty argument for \"%s\"\n", | |
bd4c625c LT |
1037 | opt->option_name); |
1038 | return -1; | |
1039 | } | |
1040 | ||
1041 | if (!opt->values) { | |
1042 | /* *=NULLopt_arg contains pointer to argument */ | |
1043 | *opt_arg = p; | |
1044 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); | |
1045 | } | |
1046 | ||
1047 | /* values possible for this option are listed in opt->values */ | |
1048 | for (arg = opt->values; arg->value; arg++) { | |
1049 | if (!strcmp(p, arg->value)) { | |
1050 | if (bit_flags) { | |
1051 | *bit_flags &= ~arg->clrmask; | |
1052 | *bit_flags |= arg->setmask; | |
1053 | } | |
1054 | return opt->arg_required; | |
1055 | } | |
1056 | } | |
1057 | ||
45b03d5e JM |
1058 | reiserfs_warning(s, "super-6506", |
1059 | "bad value \"%s\" for option \"%s\"\n", p, | |
bd4c625c | 1060 | opt->option_name); |
1da177e4 | 1061 | return -1; |
1da177e4 LT |
1062 | } |
1063 | ||
1064 | /* returns 0 if something is wrong in option string, 1 - otherwise */ | |
098297b2 JM |
1065 | static int reiserfs_parse_options(struct super_block *s, |
1066 | ||
1067 | /* string given via mount's -o */ | |
1068 | char *options, | |
1069 | ||
1070 | /* | |
1071 | * after the parsing phase, contains the | |
1072 | * collection of bitflags defining what | |
1073 | * mount options were selected. | |
1074 | */ | |
bd4c625c | 1075 | unsigned long *mount_options, |
098297b2 JM |
1076 | |
1077 | /* strtol-ed from NNN of resize=NNN */ | |
1078 | unsigned long *blocks, | |
bd4c625c | 1079 | char **jdev_name, |
00b44197 JK |
1080 | unsigned int *commit_max_age, |
1081 | char **qf_names, | |
1082 | unsigned int *qfmt) | |
1da177e4 | 1083 | { |
bd4c625c LT |
1084 | int c; |
1085 | char *arg = NULL; | |
1086 | char *pos; | |
1087 | opt_desc_t opts[] = { | |
098297b2 JM |
1088 | /* |
1089 | * Compatibility stuff, so that -o notail for old | |
1090 | * setups still work | |
1091 | */ | |
bd4c625c LT |
1092 | {"tails",.arg_required = 't',.values = tails}, |
1093 | {"notail",.clrmask = | |
1094 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
1095 | {"conv",.setmask = 1 << REISERFS_CONVERT}, | |
1096 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, | |
1097 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, | |
73422811 | 1098 | {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, |
1da177e4 | 1099 | #ifdef CONFIG_REISERFS_FS_XATTR |
bd4c625c LT |
1100 | {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
1101 | {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, | |
1da177e4 | 1102 | #else |
bd4c625c LT |
1103 | {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1104 | {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 LT |
1105 | #endif |
1106 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
bd4c625c LT |
1107 | {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
1108 | {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, | |
1da177e4 | 1109 | #else |
bd4c625c LT |
1110 | {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1111 | {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 | 1112 | #endif |
cd02b966 | 1113 | {.option_name = "nolog"}, |
bd4c625c LT |
1114 | {"replayonly",.setmask = 1 << REPLAYONLY}, |
1115 | {"block-allocator",.arg_required = 'a',.values = balloc}, | |
1116 | {"data",.arg_required = 'd',.values = logging_mode}, | |
1117 | {"barrier",.arg_required = 'b',.values = barrier_mode}, | |
1118 | {"resize",.arg_required = 'r',.values = NULL}, | |
1119 | {"jdev",.arg_required = 'j',.values = NULL}, | |
1120 | {"nolargeio",.arg_required = 'w',.values = NULL}, | |
1121 | {"commit",.arg_required = 'c',.values = NULL}, | |
c3aa0776 JK |
1122 | {"usrquota",.setmask = 1 << REISERFS_USRQUOTA}, |
1123 | {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA}, | |
1124 | {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, | |
bd4c625c LT |
1125 | {"errors",.arg_required = 'e',.values = error_actions}, |
1126 | {"usrjquota",.arg_required = | |
1127 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
1128 | {"grpjquota",.arg_required = | |
1129 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
1130 | {"jqfmt",.arg_required = 'f',.values = NULL}, | |
cd02b966 | 1131 | {.option_name = NULL} |
bd4c625c LT |
1132 | }; |
1133 | ||
1134 | *blocks = 0; | |
1135 | if (!options || !*options) | |
098297b2 JM |
1136 | /* |
1137 | * use default configuration: create tails, journaling on, no | |
1138 | * conversion to newest format | |
1139 | */ | |
bd4c625c LT |
1140 | return 1; |
1141 | ||
1142 | for (pos = options; pos;) { | |
1143 | c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); | |
1144 | if (c == -1) | |
1145 | /* wrong option is given */ | |
9a3bb301 | 1146 | return 0; |
1da177e4 | 1147 | |
bd4c625c LT |
1148 | if (c == 'r') { |
1149 | char *p; | |
1150 | ||
1151 | p = NULL; | |
1152 | /* "resize=NNN" or "resize=auto" */ | |
1153 | ||
1154 | if (!strcmp(arg, "auto")) { | |
1155 | /* From JFS code, to auto-get the size. */ | |
1156 | *blocks = | |
1157 | s->s_bdev->bd_inode->i_size >> s-> | |
1158 | s_blocksize_bits; | |
1159 | } else { | |
1160 | *blocks = simple_strtoul(arg, &p, 0); | |
1161 | if (*p != '\0') { | |
1162 | /* NNN does not look like a number */ | |
45b03d5e JM |
1163 | reiserfs_warning(s, "super-6507", |
1164 | "bad value %s for " | |
1165 | "-oresize\n", arg); | |
bd4c625c LT |
1166 | return 0; |
1167 | } | |
1168 | } | |
1da177e4 | 1169 | } |
1da177e4 | 1170 | |
bd4c625c LT |
1171 | if (c == 'c') { |
1172 | char *p = NULL; | |
1173 | unsigned long val = simple_strtoul(arg, &p, 0); | |
1174 | /* commit=NNN (time in seconds) */ | |
1175 | if (*p != '\0' || val >= (unsigned int)-1) { | |
45b03d5e JM |
1176 | reiserfs_warning(s, "super-6508", |
1177 | "bad value %s for -ocommit\n", | |
bd4c625c LT |
1178 | arg); |
1179 | return 0; | |
1180 | } | |
1181 | *commit_max_age = (unsigned int)val; | |
1da177e4 | 1182 | } |
1da177e4 | 1183 | |
bd4c625c | 1184 | if (c == 'w') { |
45b03d5e JM |
1185 | reiserfs_warning(s, "super-6509", "nolargeio option " |
1186 | "is no longer supported"); | |
36b756f2 | 1187 | return 0; |
1da177e4 | 1188 | } |
1da177e4 | 1189 | |
bd4c625c LT |
1190 | if (c == 'j') { |
1191 | if (arg && *arg && jdev_name) { | |
098297b2 JM |
1192 | /* Hm, already assigned? */ |
1193 | if (*jdev_name) { | |
45b03d5e JM |
1194 | reiserfs_warning(s, "super-6510", |
1195 | "journal device was " | |
1196 | "already specified to " | |
1197 | "be %s", *jdev_name); | |
bd4c625c LT |
1198 | return 0; |
1199 | } | |
1200 | *jdev_name = arg; | |
1201 | } | |
1da177e4 | 1202 | } |
bd4c625c LT |
1203 | #ifdef CONFIG_QUOTA |
1204 | if (c == 'u' || c == 'g') { | |
1205 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; | |
1206 | ||
6929f891 | 1207 | if (sb_any_quota_loaded(s) && |
00b44197 | 1208 | (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { |
45b03d5e JM |
1209 | reiserfs_warning(s, "super-6511", |
1210 | "cannot change journaled " | |
1211 | "quota options when quota " | |
1212 | "turned on."); | |
bd4c625c LT |
1213 | return 0; |
1214 | } | |
1215 | if (*arg) { /* Some filename specified? */ | |
1216 | if (REISERFS_SB(s)->s_qf_names[qtype] | |
1217 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], | |
1218 | arg)) { | |
45b03d5e JM |
1219 | reiserfs_warning(s, "super-6512", |
1220 | "%s quota file " | |
1221 | "already specified.", | |
bd4c625c LT |
1222 | QTYPE2NAME(qtype)); |
1223 | return 0; | |
1224 | } | |
1225 | if (strchr(arg, '/')) { | |
45b03d5e JM |
1226 | reiserfs_warning(s, "super-6513", |
1227 | "quotafile must be " | |
1228 | "on filesystem root."); | |
bd4c625c LT |
1229 | return 0; |
1230 | } | |
af591ad8 | 1231 | qf_names[qtype] = kstrdup(arg, GFP_KERNEL); |
00b44197 | 1232 | if (!qf_names[qtype]) { |
45b03d5e JM |
1233 | reiserfs_warning(s, "reiserfs-2502", |
1234 | "not enough memory " | |
1235 | "for storing " | |
1236 | "quotafile name."); | |
bd4c625c LT |
1237 | return 0; |
1238 | } | |
c3aa0776 JK |
1239 | if (qtype == USRQUOTA) |
1240 | *mount_options |= 1 << REISERFS_USRQUOTA; | |
1241 | else | |
1242 | *mount_options |= 1 << REISERFS_GRPQUOTA; | |
bd4c625c | 1243 | } else { |
00b44197 JK |
1244 | if (qf_names[qtype] != |
1245 | REISERFS_SB(s)->s_qf_names[qtype]) | |
1246 | kfree(qf_names[qtype]); | |
1247 | qf_names[qtype] = NULL; | |
c3aa0776 JK |
1248 | if (qtype == USRQUOTA) |
1249 | *mount_options &= ~(1 << REISERFS_USRQUOTA); | |
1250 | else | |
1251 | *mount_options &= ~(1 << REISERFS_GRPQUOTA); | |
bd4c625c | 1252 | } |
1da177e4 | 1253 | } |
bd4c625c LT |
1254 | if (c == 'f') { |
1255 | if (!strcmp(arg, "vfsold")) | |
00b44197 | 1256 | *qfmt = QFMT_VFS_OLD; |
bd4c625c | 1257 | else if (!strcmp(arg, "vfsv0")) |
00b44197 | 1258 | *qfmt = QFMT_VFS_V0; |
bd4c625c | 1259 | else { |
45b03d5e JM |
1260 | reiserfs_warning(s, "super-6514", |
1261 | "unknown quota format " | |
1262 | "specified."); | |
bd4c625c LT |
1263 | return 0; |
1264 | } | |
6929f891 | 1265 | if (sb_any_quota_loaded(s) && |
00b44197 | 1266 | *qfmt != REISERFS_SB(s)->s_jquota_fmt) { |
45b03d5e JM |
1267 | reiserfs_warning(s, "super-6515", |
1268 | "cannot change journaled " | |
1269 | "quota options when quota " | |
1270 | "turned on."); | |
00b44197 JK |
1271 | return 0; |
1272 | } | |
1da177e4 | 1273 | } |
bd4c625c LT |
1274 | #else |
1275 | if (c == 'u' || c == 'g' || c == 'f') { | |
45b03d5e JM |
1276 | reiserfs_warning(s, "reiserfs-2503", "journaled " |
1277 | "quota options not supported."); | |
bd4c625c | 1278 | return 0; |
1da177e4 | 1279 | } |
bd4c625c LT |
1280 | #endif |
1281 | } | |
1282 | ||
1283 | #ifdef CONFIG_QUOTA | |
00b44197 JK |
1284 | if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
1285 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { | |
45b03d5e JM |
1286 | reiserfs_warning(s, "super-6515", |
1287 | "journaled quota format not specified."); | |
1da177e4 | 1288 | return 0; |
1da177e4 | 1289 | } |
c3aa0776 JK |
1290 | if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && |
1291 | sb_has_quota_loaded(s, USRQUOTA)) || | |
1292 | (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && | |
1293 | sb_has_quota_loaded(s, GRPQUOTA))) { | |
45b03d5e JM |
1294 | reiserfs_warning(s, "super-6516", "quota options must " |
1295 | "be present when quota is turned on."); | |
bd4c625c | 1296 | return 0; |
1da177e4 LT |
1297 | } |
1298 | #endif | |
556a2a45 | 1299 | |
bd4c625c | 1300 | return 1; |
1da177e4 LT |
1301 | } |
1302 | ||
bd4c625c LT |
1303 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1304 | { | |
1305 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | | |
1306 | (1 << REISERFS_DATA_ORDERED) | | |
1307 | (1 << REISERFS_DATA_WRITEBACK)); | |
1308 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); | |
1da177e4 LT |
1309 | } |
1310 | ||
1311 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) | |
1312 | { | |
bd4c625c LT |
1313 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1314 | if (!reiserfs_data_log(s)) { | |
1315 | switch_data_mode(s, REISERFS_DATA_LOG); | |
1316 | reiserfs_info(s, "switching to journaled data mode\n"); | |
1317 | } | |
1318 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { | |
1319 | if (!reiserfs_data_ordered(s)) { | |
1320 | switch_data_mode(s, REISERFS_DATA_ORDERED); | |
1321 | reiserfs_info(s, "switching to ordered data mode\n"); | |
1322 | } | |
1323 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { | |
1324 | if (!reiserfs_data_writeback(s)) { | |
1325 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); | |
1326 | reiserfs_info(s, "switching to writeback data mode\n"); | |
1327 | } | |
1328 | } | |
1da177e4 LT |
1329 | } |
1330 | ||
bd4c625c LT |
1331 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1332 | { | |
1333 | int flush = (1 << REISERFS_BARRIER_FLUSH); | |
1334 | int none = (1 << REISERFS_BARRIER_NONE); | |
1335 | int all_barrier = flush | none; | |
1336 | ||
1337 | if (bits & all_barrier) { | |
1338 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; | |
1339 | if (bits & flush) { | |
1340 | REISERFS_SB(s)->s_mount_opt |= flush; | |
1341 | printk("reiserfs: enabling write barrier flush mode\n"); | |
1342 | } else if (bits & none) { | |
1343 | REISERFS_SB(s)->s_mount_opt |= none; | |
1344 | printk("reiserfs: write barriers turned off\n"); | |
1345 | } | |
1346 | } | |
1da177e4 LT |
1347 | } |
1348 | ||
bd4c625c | 1349 | static void handle_attrs(struct super_block *s) |
1da177e4 | 1350 | { |
bd4c625c | 1351 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1352 | |
bd4c625c LT |
1353 | if (reiserfs_attrs(s)) { |
1354 | if (old_format_only(s)) { | |
45b03d5e JM |
1355 | reiserfs_warning(s, "super-6517", "cannot support " |
1356 | "attributes on 3.5.x disk format"); | |
bd4c625c | 1357 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1358 | return; |
1359 | } | |
bd4c625c | 1360 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
45b03d5e JM |
1361 | reiserfs_warning(s, "super-6518", "cannot support " |
1362 | "attributes until flag is set in " | |
1363 | "super-block"); | |
bd4c625c | 1364 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1365 | } |
1366 | } | |
1367 | } | |
1368 | ||
00b44197 JK |
1369 | #ifdef CONFIG_QUOTA |
1370 | static void handle_quota_files(struct super_block *s, char **qf_names, | |
1371 | unsigned int *qfmt) | |
1372 | { | |
1373 | int i; | |
1374 | ||
aca60617 | 1375 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) { |
00b44197 JK |
1376 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) |
1377 | kfree(REISERFS_SB(s)->s_qf_names[i]); | |
1378 | REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; | |
1379 | } | |
a06d789b JK |
1380 | if (*qfmt) |
1381 | REISERFS_SB(s)->s_jquota_fmt = *qfmt; | |
00b44197 JK |
1382 | } |
1383 | #endif | |
1384 | ||
bd4c625c | 1385 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1da177e4 | 1386 | { |
bd4c625c LT |
1387 | struct reiserfs_super_block *rs; |
1388 | struct reiserfs_transaction_handle th; | |
1389 | unsigned long blocks; | |
1390 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; | |
1391 | unsigned long safe_mask = 0; | |
1392 | unsigned int commit_max_age = (unsigned int)-1; | |
1393 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
cdf6ccc8 | 1394 | char *new_opts = kstrdup(arg, GFP_KERNEL); |
bd4c625c | 1395 | int err; |
aca60617 | 1396 | char *qf_names[REISERFS_MAXQUOTAS]; |
00b44197 | 1397 | unsigned int qfmt = 0; |
1da177e4 | 1398 | #ifdef CONFIG_QUOTA |
bd4c625c | 1399 | int i; |
8ebc4232 | 1400 | #endif |
00b44197 | 1401 | |
02b9984d | 1402 | sync_filesystem(s); |
8ebc4232 | 1403 | reiserfs_write_lock(s); |
00b44197 | 1404 | |
8ebc4232 | 1405 | #ifdef CONFIG_QUOTA |
00b44197 | 1406 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); |
1da177e4 LT |
1407 | #endif |
1408 | ||
bd4c625c | 1409 | rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1410 | |
bd4c625c | 1411 | if (!reiserfs_parse_options |
00b44197 JK |
1412 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
1413 | qf_names, &qfmt)) { | |
1da177e4 | 1414 | #ifdef CONFIG_QUOTA |
aca60617 | 1415 | for (i = 0; i < REISERFS_MAXQUOTAS; i++) |
00b44197 JK |
1416 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) |
1417 | kfree(qf_names[i]); | |
1da177e4 | 1418 | #endif |
cdf6ccc8 | 1419 | err = -EINVAL; |
4c05141d | 1420 | goto out_err_unlock; |
bd4c625c | 1421 | } |
00b44197 JK |
1422 | #ifdef CONFIG_QUOTA |
1423 | handle_quota_files(s, qf_names, &qfmt); | |
1424 | #endif | |
bd4c625c LT |
1425 | |
1426 | handle_attrs(s); | |
1427 | ||
1428 | /* Add options that are safe here */ | |
1429 | safe_mask |= 1 << REISERFS_SMALLTAIL; | |
1430 | safe_mask |= 1 << REISERFS_LARGETAIL; | |
1431 | safe_mask |= 1 << REISERFS_NO_BORDER; | |
1432 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; | |
1433 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; | |
1434 | safe_mask |= 1 << REISERFS_TEST4; | |
1435 | safe_mask |= 1 << REISERFS_ATTRS; | |
1436 | safe_mask |= 1 << REISERFS_XATTRS_USER; | |
1437 | safe_mask |= 1 << REISERFS_POSIXACL; | |
1438 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; | |
1439 | safe_mask |= 1 << REISERFS_BARRIER_NONE; | |
1440 | safe_mask |= 1 << REISERFS_ERROR_RO; | |
1441 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; | |
1442 | safe_mask |= 1 << REISERFS_ERROR_PANIC; | |
c3aa0776 JK |
1443 | safe_mask |= 1 << REISERFS_USRQUOTA; |
1444 | safe_mask |= 1 << REISERFS_GRPQUOTA; | |
bd4c625c | 1445 | |
098297b2 JM |
1446 | /* |
1447 | * Update the bitmask, taking care to keep | |
1448 | * the bits we're not allowed to change here | |
1449 | */ | |
bd4c625c LT |
1450 | REISERFS_SB(s)->s_mount_opt = |
1451 | (REISERFS_SB(s)-> | |
1452 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); | |
1453 | ||
1454 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { | |
1455 | journal->j_max_commit_age = commit_max_age; | |
1456 | journal->j_max_trans_age = commit_max_age; | |
1457 | } else if (commit_max_age == 0) { | |
1458 | /* 0 means restore defaults. */ | |
1459 | journal->j_max_commit_age = journal->j_default_max_commit_age; | |
1460 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
1461 | } | |
1462 | ||
1463 | if (blocks) { | |
cdf6ccc8 MS |
1464 | err = reiserfs_resize(s, blocks); |
1465 | if (err != 0) | |
4c05141d | 1466 | goto out_err_unlock; |
bd4c625c LT |
1467 | } |
1468 | ||
1469 | if (*mount_flags & MS_RDONLY) { | |
4c05141d | 1470 | reiserfs_write_unlock(s); |
bd4c625c LT |
1471 | reiserfs_xattr_init(s, *mount_flags); |
1472 | /* remount read-only */ | |
1473 | if (s->s_flags & MS_RDONLY) | |
1474 | /* it is read-only already */ | |
4c05141d | 1475 | goto out_ok_unlocked; |
c79d967d | 1476 | |
0f0dd62f CH |
1477 | err = dquot_suspend(s, -1); |
1478 | if (err < 0) | |
c79d967d | 1479 | goto out_err; |
c79d967d | 1480 | |
bd4c625c LT |
1481 | /* try to remount file system with read-only permissions */ |
1482 | if (sb_umount_state(rs) == REISERFS_VALID_FS | |
1483 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { | |
4c05141d | 1484 | goto out_ok_unlocked; |
bd4c625c LT |
1485 | } |
1486 | ||
4c05141d JM |
1487 | reiserfs_write_lock(s); |
1488 | ||
bd4c625c LT |
1489 | err = journal_begin(&th, s, 10); |
1490 | if (err) | |
4c05141d | 1491 | goto out_err_unlock; |
bd4c625c LT |
1492 | |
1493 | /* Mounting a rw partition read-only. */ | |
1494 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1495 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); | |
09f1b80b | 1496 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
bd4c625c LT |
1497 | } else { |
1498 | /* remount read-write */ | |
1499 | if (!(s->s_flags & MS_RDONLY)) { | |
4c05141d | 1500 | reiserfs_write_unlock(s); |
bd4c625c | 1501 | reiserfs_xattr_init(s, *mount_flags); |
4c05141d | 1502 | goto out_ok_unlocked; /* We are read-write already */ |
bd4c625c LT |
1503 | } |
1504 | ||
cdf6ccc8 MS |
1505 | if (reiserfs_is_journal_aborted(journal)) { |
1506 | err = journal->j_errno; | |
4c05141d | 1507 | goto out_err_unlock; |
cdf6ccc8 | 1508 | } |
bd4c625c LT |
1509 | |
1510 | handle_data_mode(s, mount_options); | |
1511 | handle_barrier_mode(s, mount_options); | |
1512 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
098297b2 JM |
1513 | |
1514 | /* now it is safe to call journal_begin */ | |
1515 | s->s_flags &= ~MS_RDONLY; | |
bd4c625c LT |
1516 | err = journal_begin(&th, s, 10); |
1517 | if (err) | |
4c05141d | 1518 | goto out_err_unlock; |
bd4c625c LT |
1519 | |
1520 | /* Mount a partition which is read-only, read-write */ | |
1521 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1522 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1523 | s->s_flags &= ~MS_RDONLY; | |
1524 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
702d21c6 JM |
1525 | if (!old_format_only(s)) |
1526 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
bd4c625c | 1527 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
09f1b80b | 1528 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
bd4c625c LT |
1529 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; |
1530 | } | |
1531 | /* this will force a full flush of all journal lists */ | |
1532 | SB_JOURNAL(s)->j_must_wait = 1; | |
58d85426 | 1533 | err = journal_end(&th); |
bd4c625c | 1534 | if (err) |
4c05141d | 1535 | goto out_err_unlock; |
bd4c625c | 1536 | |
4c05141d | 1537 | reiserfs_write_unlock(s); |
bd4c625c | 1538 | if (!(*mount_flags & MS_RDONLY)) { |
0f0dd62f | 1539 | dquot_resume(s, -1); |
3bb3e1fc | 1540 | reiserfs_write_lock(s); |
bd4c625c | 1541 | finish_unfinished(s); |
4c05141d | 1542 | reiserfs_write_unlock(s); |
bd4c625c LT |
1543 | reiserfs_xattr_init(s, *mount_flags); |
1544 | } | |
1545 | ||
4c05141d | 1546 | out_ok_unlocked: |
2a32cebd | 1547 | replace_mount_options(s, new_opts); |
bd4c625c | 1548 | return 0; |
cdf6ccc8 | 1549 | |
4c05141d | 1550 | out_err_unlock: |
3bb3e1fc | 1551 | reiserfs_write_unlock(s); |
cdf6ccc8 MS |
1552 | out_err: |
1553 | kfree(new_opts); | |
1554 | return err; | |
1da177e4 LT |
1555 | } |
1556 | ||
bd4c625c | 1557 | static int read_super_block(struct super_block *s, int offset) |
1da177e4 | 1558 | { |
bd4c625c LT |
1559 | struct buffer_head *bh; |
1560 | struct reiserfs_super_block *rs; | |
1561 | int fs_blocksize; | |
1da177e4 | 1562 | |
bd4c625c LT |
1563 | bh = sb_bread(s, offset / s->s_blocksize); |
1564 | if (!bh) { | |
45b03d5e | 1565 | reiserfs_warning(s, "sh-2006", |
bd4c625c | 1566 | "bread failed (dev %s, block %lu, size %lu)", |
2ccdc413 | 1567 | s->s_id, offset / s->s_blocksize, |
bd4c625c LT |
1568 | s->s_blocksize); |
1569 | return 1; | |
1570 | } | |
1da177e4 | 1571 | |
bd4c625c LT |
1572 | rs = (struct reiserfs_super_block *)bh->b_data; |
1573 | if (!is_any_reiserfs_magic_string(rs)) { | |
1574 | brelse(bh); | |
1575 | return 1; | |
1576 | } | |
098297b2 JM |
1577 | /* |
1578 | * ok, reiserfs signature (old or new) found in at the given offset | |
1579 | */ | |
bd4c625c LT |
1580 | fs_blocksize = sb_blocksize(rs); |
1581 | brelse(bh); | |
1582 | sb_set_blocksize(s, fs_blocksize); | |
1da177e4 | 1583 | |
bd4c625c LT |
1584 | bh = sb_bread(s, offset / s->s_blocksize); |
1585 | if (!bh) { | |
45b03d5e JM |
1586 | reiserfs_warning(s, "sh-2007", |
1587 | "bread failed (dev %s, block %lu, size %lu)", | |
2ccdc413 | 1588 | s->s_id, offset / s->s_blocksize, |
bd4c625c LT |
1589 | s->s_blocksize); |
1590 | return 1; | |
1591 | } | |
1da177e4 | 1592 | |
bd4c625c LT |
1593 | rs = (struct reiserfs_super_block *)bh->b_data; |
1594 | if (sb_blocksize(rs) != s->s_blocksize) { | |
45b03d5e | 1595 | reiserfs_warning(s, "sh-2011", "can't find a reiserfs " |
53872ed0 | 1596 | "filesystem on (dev %s, block %llu, size %lu)", |
2ccdc413 | 1597 | s->s_id, |
bd4c625c LT |
1598 | (unsigned long long)bh->b_blocknr, |
1599 | s->s_blocksize); | |
1600 | brelse(bh); | |
1601 | return 1; | |
1602 | } | |
1da177e4 | 1603 | |
bd4c625c LT |
1604 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
1605 | brelse(bh); | |
45b03d5e JM |
1606 | reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " |
1607 | "--rebuild-tree run detected. Please run\n" | |
1608 | "reiserfsck --rebuild-tree and wait for a " | |
1609 | "completion. If that fails\n" | |
bd4c625c LT |
1610 | "get newer reiserfsprogs package"); |
1611 | return 1; | |
1da177e4 | 1612 | } |
1da177e4 | 1613 | |
bd4c625c LT |
1614 | SB_BUFFER_WITH_SB(s) = bh; |
1615 | SB_DISK_SUPER_BLOCK(s) = rs; | |
1616 | ||
098297b2 JM |
1617 | /* |
1618 | * magic is of non-standard journal filesystem, look at s_version to | |
1619 | * find which format is in use | |
1620 | */ | |
bd4c625c | 1621 | if (is_reiserfs_jr(rs)) { |
bd4c625c | 1622 | if (sb_version(rs) == REISERFS_VERSION_2) |
1d889d99 JM |
1623 | reiserfs_info(s, "found reiserfs format \"3.6\"" |
1624 | " with non-standard journal\n"); | |
bd4c625c | 1625 | else if (sb_version(rs) == REISERFS_VERSION_1) |
1d889d99 JM |
1626 | reiserfs_info(s, "found reiserfs format \"3.5\"" |
1627 | " with non-standard journal\n"); | |
bd4c625c | 1628 | else { |
45b03d5e JM |
1629 | reiserfs_warning(s, "sh-2012", "found unknown " |
1630 | "format \"%u\" of reiserfs with " | |
1631 | "non-standard magic", sb_version(rs)); | |
bd4c625c LT |
1632 | return 1; |
1633 | } | |
1634 | } else | |
098297b2 JM |
1635 | /* |
1636 | * s_version of standard format may contain incorrect | |
1637 | * information, so we just look at the magic string | |
1638 | */ | |
bd4c625c LT |
1639 | reiserfs_info(s, |
1640 | "found reiserfs format \"%s\" with standard journal\n", | |
1641 | is_reiserfs_3_5(rs) ? "3.5" : "3.6"); | |
1642 | ||
1643 | s->s_op = &reiserfs_sops; | |
1644 | s->s_export_op = &reiserfs_export_ops; | |
1da177e4 | 1645 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
1646 | s->s_qcop = &reiserfs_qctl_operations; |
1647 | s->dq_op = &reiserfs_quota_operations; | |
53873638 | 1648 | s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
1da177e4 LT |
1649 | #endif |
1650 | ||
098297b2 JM |
1651 | /* |
1652 | * new format is limited by the 32 bit wide i_blocks field, want to | |
1653 | * be one full block below that. | |
bd4c625c LT |
1654 | */ |
1655 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; | |
1656 | return 0; | |
1da177e4 LT |
1657 | } |
1658 | ||
1da177e4 | 1659 | /* after journal replay, reread all bitmap and super blocks */ |
bd4c625c LT |
1660 | static int reread_meta_blocks(struct super_block *s) |
1661 | { | |
a228bf8f | 1662 | ll_rw_block(READ, 1, &SB_BUFFER_WITH_SB(s)); |
bd4c625c LT |
1663 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); |
1664 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { | |
45b03d5e | 1665 | reiserfs_warning(s, "reiserfs-2504", "error reading the super"); |
bd4c625c LT |
1666 | return 1; |
1667 | } | |
1da177e4 | 1668 | |
bd4c625c | 1669 | return 0; |
bd4c625c | 1670 | } |
1da177e4 | 1671 | |
098297b2 | 1672 | /* hash detection stuff */ |
1da177e4 | 1673 | |
098297b2 JM |
1674 | /* |
1675 | * if root directory is empty - we set default - Yura's - hash and | |
1676 | * warn about it | |
1677 | * FIXME: we look for only one name in a directory. If tea and yura | |
1678 | * both have the same value - we ask user to send report to the | |
1679 | * mailing list | |
1680 | */ | |
bd4c625c | 1681 | static __u32 find_hash_out(struct super_block *s) |
1da177e4 | 1682 | { |
bd4c625c LT |
1683 | int retval; |
1684 | struct inode *inode; | |
1685 | struct cpu_key key; | |
1686 | INITIALIZE_PATH(path); | |
1687 | struct reiserfs_dir_entry de; | |
c48138c2 | 1688 | struct reiserfs_de_head *deh; |
bd4c625c | 1689 | __u32 hash = DEFAULT_HASH; |
c48138c2 | 1690 | __u32 deh_hashval, teahash, r5hash, yurahash; |
bd4c625c | 1691 | |
2b0143b5 | 1692 | inode = d_inode(s->s_root); |
bd4c625c | 1693 | |
c48138c2 JM |
1694 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); |
1695 | retval = search_by_entry_key(s, &key, &path, &de); | |
1696 | if (retval == IO_ERROR) { | |
1697 | pathrelse(&path); | |
1698 | return UNSET_HASH; | |
1699 | } | |
1700 | if (retval == NAME_NOT_FOUND) | |
1701 | de.de_entry_num--; | |
bd4c625c | 1702 | |
c48138c2 JM |
1703 | set_de_name_and_namelen(&de); |
1704 | deh = de.de_deh + de.de_entry_num; | |
1705 | ||
1706 | if (deh_offset(deh) == DOT_DOT_OFFSET) { | |
1707 | /* allow override in this case */ | |
1708 | if (reiserfs_rupasov_hash(s)) | |
bd4c625c | 1709 | hash = YURA_HASH; |
c48138c2 JM |
1710 | reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n"); |
1711 | goto out; | |
1712 | } | |
bd4c625c | 1713 | |
c48138c2 JM |
1714 | deh_hashval = GET_HASH_VALUE(deh_offset(deh)); |
1715 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); | |
1716 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); | |
1717 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); | |
1718 | ||
1719 | if ((teahash == r5hash && deh_hashval == r5hash) || | |
1720 | (teahash == yurahash && deh_hashval == yurahash) || | |
1721 | (r5hash == yurahash && deh_hashval == yurahash)) { | |
1722 | reiserfs_warning(s, "reiserfs-2506", | |
1723 | "Unable to automatically detect hash " | |
1724 | "function. Please mount with -o " | |
1725 | "hash={tea,rupasov,r5}"); | |
1726 | hash = UNSET_HASH; | |
1727 | goto out; | |
1728 | } | |
1729 | ||
1730 | if (deh_hashval == yurahash) | |
1731 | hash = YURA_HASH; | |
1732 | else if (deh_hashval == teahash) | |
1733 | hash = TEA_HASH; | |
1734 | else if (deh_hashval == r5hash) | |
1735 | hash = R5_HASH; | |
1736 | else { | |
1737 | reiserfs_warning(s, "reiserfs-2506", | |
1738 | "Unrecognised hash function"); | |
1739 | hash = UNSET_HASH; | |
1740 | } | |
1741 | out: | |
bd4c625c LT |
1742 | pathrelse(&path); |
1743 | return hash; | |
1da177e4 LT |
1744 | } |
1745 | ||
098297b2 | 1746 | /* finds out which hash names are sorted with */ |
bd4c625c | 1747 | static int what_hash(struct super_block *s) |
1da177e4 | 1748 | { |
bd4c625c LT |
1749 | __u32 code; |
1750 | ||
1751 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); | |
1752 | ||
098297b2 JM |
1753 | /* |
1754 | * reiserfs_hash_detect() == true if any of the hash mount options | |
1755 | * were used. We must check them to make sure the user isn't | |
1756 | * using a bad hash value | |
bd4c625c LT |
1757 | */ |
1758 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) | |
1759 | code = find_hash_out(s); | |
1760 | ||
1761 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { | |
098297b2 JM |
1762 | /* |
1763 | * detection has found the hash, and we must check against the | |
1764 | * mount options | |
bd4c625c LT |
1765 | */ |
1766 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { | |
45b03d5e JM |
1767 | reiserfs_warning(s, "reiserfs-2507", |
1768 | "Error, %s hash detected, " | |
bd4c625c LT |
1769 | "unable to force rupasov hash", |
1770 | reiserfs_hashname(code)); | |
1771 | code = UNSET_HASH; | |
1772 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { | |
45b03d5e JM |
1773 | reiserfs_warning(s, "reiserfs-2508", |
1774 | "Error, %s hash detected, " | |
bd4c625c LT |
1775 | "unable to force tea hash", |
1776 | reiserfs_hashname(code)); | |
1777 | code = UNSET_HASH; | |
1778 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { | |
45b03d5e JM |
1779 | reiserfs_warning(s, "reiserfs-2509", |
1780 | "Error, %s hash detected, " | |
bd4c625c LT |
1781 | "unable to force r5 hash", |
1782 | reiserfs_hashname(code)); | |
1783 | code = UNSET_HASH; | |
1784 | } | |
1785 | } else { | |
098297b2 JM |
1786 | /* |
1787 | * find_hash_out was not called or | |
1788 | * could not determine the hash | |
1789 | */ | |
bd4c625c LT |
1790 | if (reiserfs_rupasov_hash(s)) { |
1791 | code = YURA_HASH; | |
1792 | } else if (reiserfs_tea_hash(s)) { | |
1793 | code = TEA_HASH; | |
1794 | } else if (reiserfs_r5_hash(s)) { | |
1795 | code = R5_HASH; | |
1796 | } | |
1797 | } | |
1798 | ||
098297b2 JM |
1799 | /* |
1800 | * if we are mounted RW, and we have a new valid hash code, update | |
1801 | * the super | |
bd4c625c LT |
1802 | */ |
1803 | if (code != UNSET_HASH && | |
1804 | !(s->s_flags & MS_RDONLY) && | |
1805 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { | |
1806 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); | |
1807 | } | |
1808 | return code; | |
1da177e4 LT |
1809 | } |
1810 | ||
098297b2 | 1811 | /* return pointer to appropriate function */ |
bd4c625c | 1812 | static hashf_t hash_function(struct super_block *s) |
1da177e4 | 1813 | { |
bd4c625c LT |
1814 | switch (what_hash(s)) { |
1815 | case TEA_HASH: | |
1816 | reiserfs_info(s, "Using tea hash to sort names\n"); | |
1817 | return keyed_hash; | |
1818 | case YURA_HASH: | |
1819 | reiserfs_info(s, "Using rupasov hash to sort names\n"); | |
1820 | return yura_hash; | |
1821 | case R5_HASH: | |
1822 | reiserfs_info(s, "Using r5 hash to sort names\n"); | |
1823 | return r5_hash; | |
1824 | } | |
1825 | return NULL; | |
1da177e4 LT |
1826 | } |
1827 | ||
098297b2 | 1828 | /* this is used to set up correct value for old partitions */ |
bd4c625c | 1829 | static int function2code(hashf_t func) |
1da177e4 | 1830 | { |
bd4c625c LT |
1831 | if (func == keyed_hash) |
1832 | return TEA_HASH; | |
1833 | if (func == yura_hash) | |
1834 | return YURA_HASH; | |
1835 | if (func == r5_hash) | |
1836 | return R5_HASH; | |
1da177e4 | 1837 | |
098297b2 | 1838 | BUG(); /* should never happen */ |
1da177e4 | 1839 | |
bd4c625c | 1840 | return 0; |
1da177e4 LT |
1841 | } |
1842 | ||
45b03d5e | 1843 | #define SWARN(silent, s, id, ...) \ |
1da177e4 | 1844 | if (!(silent)) \ |
45b03d5e | 1845 | reiserfs_warning(s, id, __VA_ARGS__) |
1da177e4 | 1846 | |
bd4c625c | 1847 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1da177e4 | 1848 | { |
bd4c625c | 1849 | struct inode *root_inode; |
bd4c625c LT |
1850 | struct reiserfs_transaction_handle th; |
1851 | int old_format = 0; | |
1852 | unsigned long blocks; | |
1853 | unsigned int commit_max_age = 0; | |
1854 | int jinit_done = 0; | |
1855 | struct reiserfs_iget_args args; | |
1856 | struct reiserfs_super_block *rs; | |
1857 | char *jdev_name; | |
1858 | struct reiserfs_sb_info *sbi; | |
1859 | int errval = -EINVAL; | |
aca60617 | 1860 | char *qf_names[REISERFS_MAXQUOTAS] = {}; |
00b44197 | 1861 | unsigned int qfmt = 0; |
bd4c625c | 1862 | |
cdf6ccc8 MS |
1863 | save_mount_options(s, data); |
1864 | ||
01afb213 | 1865 | sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
b7b7fa43 JM |
1866 | if (!sbi) |
1867 | return -ENOMEM; | |
bd4c625c | 1868 | s->s_fs_info = sbi; |
bd4c625c | 1869 | /* Set default values for options: non-aggressive tails, RO on errors */ |
efaa33eb AB |
1870 | sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); |
1871 | sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); | |
1872 | sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); | |
098297b2 | 1873 | /* no preallocation minimum, be smart in reiserfs_file_write instead */ |
efaa33eb | 1874 | sbi->s_alloc_options.preallocmin = 0; |
bd4c625c | 1875 | /* Preallocate by 16 blocks (17-1) at once */ |
efaa33eb | 1876 | sbi->s_alloc_options.preallocsize = 17; |
bd4c625c LT |
1877 | /* setup default block allocator options */ |
1878 | reiserfs_init_alloc_options(s); | |
1879 | ||
033369d1 AB |
1880 | spin_lock_init(&sbi->old_work_lock); |
1881 | INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); | |
efaa33eb AB |
1882 | mutex_init(&sbi->lock); |
1883 | sbi->lock_depth = -1; | |
8ebc4232 | 1884 | |
797d9016 JM |
1885 | sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0, |
1886 | s->s_id); | |
1887 | if (!sbi->commit_wq) { | |
1888 | SWARN(silent, s, "", "Cannot allocate commit workqueue"); | |
1889 | errval = -ENOMEM; | |
1890 | goto error_unlocked; | |
1891 | } | |
1892 | ||
bd4c625c LT |
1893 | jdev_name = NULL; |
1894 | if (reiserfs_parse_options | |
a228bf8f | 1895 | (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name, |
00b44197 | 1896 | &commit_max_age, qf_names, &qfmt) == 0) { |
f32485be | 1897 | goto error_unlocked; |
bd4c625c | 1898 | } |
c3aa0776 | 1899 | if (jdev_name && jdev_name[0]) { |
efaa33eb AB |
1900 | sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL); |
1901 | if (!sbi->s_jdev) { | |
c3aa0776 JK |
1902 | SWARN(silent, s, "", "Cannot allocate memory for " |
1903 | "journal device name"); | |
1904 | goto error; | |
1905 | } | |
1906 | } | |
00b44197 JK |
1907 | #ifdef CONFIG_QUOTA |
1908 | handle_quota_files(s, qf_names, &qfmt); | |
1909 | #endif | |
bd4c625c LT |
1910 | |
1911 | if (blocks) { | |
45b03d5e | 1912 | SWARN(silent, s, "jmacd-7", "resize option for remount only"); |
f32485be | 1913 | goto error_unlocked; |
bd4c625c LT |
1914 | } |
1915 | ||
098297b2 JM |
1916 | /* |
1917 | * try old format (undistributed bitmap, super block in 8-th 1k | |
1918 | * block of a device) | |
1919 | */ | |
bd4c625c LT |
1920 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) |
1921 | old_format = 1; | |
098297b2 JM |
1922 | |
1923 | /* | |
1924 | * try new format (64-th 1k block), which can contain reiserfs | |
1925 | * super block | |
1926 | */ | |
bd4c625c | 1927 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { |
45b03d5e | 1928 | SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", |
2ccdc413 | 1929 | s->s_id); |
f32485be | 1930 | goto error_unlocked; |
bd4c625c LT |
1931 | } |
1932 | ||
1933 | rs = SB_DISK_SUPER_BLOCK(s); | |
098297b2 JM |
1934 | /* |
1935 | * Let's do basic sanity check to verify that underlying device is not | |
1936 | * smaller than the filesystem. If the check fails then abort and | |
1937 | * scream, because bad stuff will happen otherwise. | |
1938 | */ | |
bd4c625c LT |
1939 | if (s->s_bdev && s->s_bdev->bd_inode |
1940 | && i_size_read(s->s_bdev->bd_inode) < | |
1941 | sb_block_count(rs) * sb_blocksize(rs)) { | |
45b03d5e JM |
1942 | SWARN(silent, s, "", "Filesystem cannot be " |
1943 | "mounted because it is bigger than the device"); | |
1944 | SWARN(silent, s, "", "You may need to run fsck " | |
1945 | "or increase size of your LVM partition"); | |
1946 | SWARN(silent, s, "", "Or may be you forgot to " | |
1947 | "reboot after fdisk when it told you to"); | |
f32485be | 1948 | goto error_unlocked; |
bd4c625c LT |
1949 | } |
1950 | ||
1951 | sbi->s_mount_state = SB_REISERFS_STATE(s); | |
1952 | sbi->s_mount_state = REISERFS_VALID_FS; | |
1953 | ||
6f01046b | 1954 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
45b03d5e | 1955 | SWARN(silent, s, "jmacd-8", "unable to read bitmap"); |
f32485be | 1956 | goto error_unlocked; |
bd4c625c | 1957 | } |
f32485be | 1958 | |
d2c89a42 | 1959 | errval = -EINVAL; |
1da177e4 | 1960 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1961 | SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); |
1962 | SWARN(silent, s, "", "- it is slow mode for debugging."); | |
1da177e4 LT |
1963 | #endif |
1964 | ||
bd4c625c LT |
1965 | /* make data=ordered the default */ |
1966 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && | |
1967 | !reiserfs_data_writeback(s)) { | |
efaa33eb | 1968 | sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); |
bd4c625c LT |
1969 | } |
1970 | ||
1971 | if (reiserfs_data_log(s)) { | |
1972 | reiserfs_info(s, "using journaled data mode\n"); | |
1973 | } else if (reiserfs_data_ordered(s)) { | |
1974 | reiserfs_info(s, "using ordered data mode\n"); | |
1975 | } else { | |
1976 | reiserfs_info(s, "using writeback data mode\n"); | |
1977 | } | |
1978 | if (reiserfs_barrier_flush(s)) { | |
1979 | printk("reiserfs: using flush barriers\n"); | |
1980 | } | |
f32485be | 1981 | |
37c69b98 FW |
1982 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { |
1983 | SWARN(silent, s, "sh-2022", | |
1984 | "unable to initialize journal space"); | |
1985 | goto error_unlocked; | |
1986 | } else { | |
098297b2 JM |
1987 | /* |
1988 | * once this is set, journal_release must be called | |
1989 | * if we error out of the mount | |
1990 | */ | |
1991 | jinit_done = 1; | |
37c69b98 FW |
1992 | } |
1993 | ||
bd4c625c | 1994 | if (reread_meta_blocks(s)) { |
45b03d5e JM |
1995 | SWARN(silent, s, "jmacd-9", |
1996 | "unable to reread meta blocks after journal init"); | |
9b467e6e | 1997 | goto error_unlocked; |
bd4c625c LT |
1998 | } |
1999 | ||
2000 | if (replay_only(s)) | |
9b467e6e | 2001 | goto error_unlocked; |
bd4c625c LT |
2002 | |
2003 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { | |
45b03d5e JM |
2004 | SWARN(silent, s, "clm-7000", |
2005 | "Detected readonly device, marking FS readonly"); | |
bd4c625c LT |
2006 | s->s_flags |= MS_RDONLY; |
2007 | } | |
2008 | args.objectid = REISERFS_ROOT_OBJECTID; | |
2009 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; | |
2010 | root_inode = | |
2011 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, | |
a228bf8f | 2012 | reiserfs_init_locked_inode, (void *)&args); |
bd4c625c | 2013 | if (!root_inode) { |
45b03d5e | 2014 | SWARN(silent, s, "jmacd-10", "get root inode failed"); |
9b467e6e | 2015 | goto error_unlocked; |
bd4c625c LT |
2016 | } |
2017 | ||
9b467e6e FW |
2018 | /* |
2019 | * This path assumed to be called with the BKL in the old times. | |
2020 | * Now we have inherited the big reiserfs lock from it and many | |
2021 | * reiserfs helpers called in the mount path and elsewhere require | |
2022 | * this lock to be held even if it's not always necessary. Let's be | |
2023 | * conservative and hold it early. The window can be reduced after | |
2024 | * careful review of the code. | |
2025 | */ | |
2026 | reiserfs_write_lock(s); | |
2027 | ||
bd4c625c LT |
2028 | if (root_inode->i_state & I_NEW) { |
2029 | reiserfs_read_locked_inode(root_inode, &args); | |
2030 | unlock_new_inode(root_inode); | |
2031 | } | |
2032 | ||
48fde701 AV |
2033 | s->s_root = d_make_root(root_inode); |
2034 | if (!s->s_root) | |
bd4c625c | 2035 | goto error; |
098297b2 | 2036 | /* define and initialize hash function */ |
bd4c625c LT |
2037 | sbi->s_hash_function = hash_function(s); |
2038 | if (sbi->s_hash_function == NULL) { | |
2039 | dput(s->s_root); | |
2040 | s->s_root = NULL; | |
2041 | goto error; | |
2042 | } | |
2043 | ||
2044 | if (is_reiserfs_3_5(rs) | |
2045 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) | |
a228bf8f | 2046 | set_bit(REISERFS_3_5, &sbi->s_properties); |
e1fabd3c | 2047 | else if (old_format) |
a228bf8f | 2048 | set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties); |
bd4c625c | 2049 | else |
a228bf8f | 2050 | set_bit(REISERFS_3_6, &sbi->s_properties); |
bd4c625c LT |
2051 | |
2052 | if (!(s->s_flags & MS_RDONLY)) { | |
2053 | ||
2054 | errval = journal_begin(&th, s, 1); | |
2055 | if (errval) { | |
2056 | dput(s->s_root); | |
2057 | s->s_root = NULL; | |
2058 | goto error; | |
2059 | } | |
2060 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
2061 | ||
2062 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
2063 | set_sb_fs_state(rs, 0); | |
2064 | ||
098297b2 JM |
2065 | /* |
2066 | * Clear out s_bmap_nr if it would wrap. We can handle this | |
cb680c1b JM |
2067 | * case, but older revisions can't. This will cause the |
2068 | * file system to fail mount on those older implementations, | |
098297b2 JM |
2069 | * avoiding corruption. -jeffm |
2070 | */ | |
cb680c1b JM |
2071 | if (bmap_would_wrap(reiserfs_bmap_count(s)) && |
2072 | sb_bmap_nr(rs) != 0) { | |
45b03d5e | 2073 | reiserfs_warning(s, "super-2030", "This file system " |
cb680c1b JM |
2074 | "claims to use %u bitmap blocks in " |
2075 | "its super block, but requires %u. " | |
2076 | "Clearing to zero.", sb_bmap_nr(rs), | |
2077 | reiserfs_bmap_count(s)); | |
2078 | ||
2079 | set_sb_bmap_nr(rs, 0); | |
2080 | } | |
2081 | ||
bd4c625c | 2082 | if (old_format_only(s)) { |
098297b2 JM |
2083 | /* |
2084 | * filesystem of format 3.5 either with standard | |
2085 | * or non-standard journal | |
2086 | */ | |
bd4c625c LT |
2087 | if (convert_reiserfs(s)) { |
2088 | /* and -o conv is given */ | |
2089 | if (!silent) | |
2090 | reiserfs_info(s, | |
2091 | "converting 3.5 filesystem to the 3.6 format"); | |
2092 | ||
2093 | if (is_reiserfs_3_5(rs)) | |
098297b2 JM |
2094 | /* |
2095 | * put magic string of 3.6 format. | |
2096 | * 2.2 will not be able to | |
2097 | * mount this filesystem anymore | |
2098 | */ | |
bd4c625c LT |
2099 | memcpy(rs->s_v1.s_magic, |
2100 | reiserfs_3_6_magic_string, | |
2101 | sizeof | |
2102 | (reiserfs_3_6_magic_string)); | |
2103 | ||
2104 | set_sb_version(rs, REISERFS_VERSION_2); | |
2105 | reiserfs_convert_objectid_map_v1(s); | |
a228bf8f JM |
2106 | set_bit(REISERFS_3_6, &sbi->s_properties); |
2107 | clear_bit(REISERFS_3_5, &sbi->s_properties); | |
bd4c625c LT |
2108 | } else if (!silent) { |
2109 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
2110 | } | |
702d21c6 JM |
2111 | } else |
2112 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
2113 | ||
bd4c625c | 2114 | |
09f1b80b | 2115 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); |
58d85426 | 2116 | errval = journal_end(&th); |
bd4c625c LT |
2117 | if (errval) { |
2118 | dput(s->s_root); | |
2119 | s->s_root = NULL; | |
2120 | goto error; | |
2121 | } | |
2122 | ||
4c05141d | 2123 | reiserfs_write_unlock(s); |
edcc37a0 AV |
2124 | if ((errval = reiserfs_lookup_privroot(s)) || |
2125 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
2126 | dput(s->s_root); |
2127 | s->s_root = NULL; | |
4c05141d | 2128 | goto error_unlocked; |
bd4c625c | 2129 | } |
4c05141d | 2130 | reiserfs_write_lock(s); |
bd4c625c | 2131 | |
098297b2 JM |
2132 | /* |
2133 | * look for files which were to be removed in previous session | |
2134 | */ | |
bd4c625c LT |
2135 | finish_unfinished(s); |
2136 | } else { | |
2137 | if (old_format_only(s) && !silent) { | |
2138 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
2139 | } | |
2140 | ||
4c05141d | 2141 | reiserfs_write_unlock(s); |
edcc37a0 AV |
2142 | if ((errval = reiserfs_lookup_privroot(s)) || |
2143 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
2144 | dput(s->s_root); |
2145 | s->s_root = NULL; | |
4c05141d | 2146 | goto error_unlocked; |
bd4c625c | 2147 | } |
4c05141d | 2148 | reiserfs_write_lock(s); |
bd4c625c | 2149 | } |
098297b2 JM |
2150 | /* |
2151 | * mark hash in super block: it could be unset. overwrite should be ok | |
2152 | */ | |
bd4c625c LT |
2153 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); |
2154 | ||
2155 | handle_attrs(s); | |
2156 | ||
2157 | reiserfs_proc_info_init(s); | |
2158 | ||
2159 | init_waitqueue_head(&(sbi->s_wait)); | |
2160 | spin_lock_init(&sbi->bitmap_lock); | |
2161 | ||
8ebc4232 FW |
2162 | reiserfs_write_unlock(s); |
2163 | ||
bd4c625c LT |
2164 | return (0); |
2165 | ||
00b44197 | 2166 | error: |
f32485be FW |
2167 | reiserfs_write_unlock(s); |
2168 | ||
2169 | error_unlocked: | |
2170 | /* kill the commit thread, free journal ram */ | |
2171 | if (jinit_done) { | |
2172 | reiserfs_write_lock(s); | |
bd4c625c | 2173 | journal_release_error(NULL, s); |
f32485be | 2174 | reiserfs_write_unlock(s); |
bd4c625c | 2175 | } |
5065227b | 2176 | |
fa0c5540 JS |
2177 | if (sbi->commit_wq) |
2178 | destroy_workqueue(sbi->commit_wq); | |
2179 | ||
033369d1 AB |
2180 | cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); |
2181 | ||
5065227b | 2182 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
2183 | if (SB_BUFFER_WITH_SB(s)) |
2184 | brelse(SB_BUFFER_WITH_SB(s)); | |
1da177e4 | 2185 | #ifdef CONFIG_QUOTA |
5065227b JM |
2186 | { |
2187 | int j; | |
aca60617 | 2188 | for (j = 0; j < REISERFS_MAXQUOTAS; j++) |
00b44197 | 2189 | kfree(qf_names[j]); |
bd4c625c | 2190 | } |
1da177e4 | 2191 | #endif |
833d304b | 2192 | kfree(sbi); |
1da177e4 | 2193 | |
bd4c625c LT |
2194 | s->s_fs_info = NULL; |
2195 | return errval; | |
1da177e4 LT |
2196 | } |
2197 | ||
726c3342 | 2198 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2199 | { |
726c3342 | 2200 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
bd4c625c LT |
2201 | |
2202 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); | |
2203 | buf->f_bfree = sb_free_blocks(rs); | |
2204 | buf->f_bavail = buf->f_bfree; | |
2205 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; | |
726c3342 | 2206 | buf->f_bsize = dentry->d_sb->s_blocksize; |
bd4c625c LT |
2207 | /* changed to accommodate gcc folks. */ |
2208 | buf->f_type = REISERFS_SUPER_MAGIC; | |
651d0623 CL |
2209 | buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); |
2210 | buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, | |
2211 | sizeof(rs->s_uuid)/2); | |
2212 | ||
bd4c625c | 2213 | return 0; |
1da177e4 LT |
2214 | } |
2215 | ||
2216 | #ifdef CONFIG_QUOTA | |
1da177e4 LT |
2217 | static int reiserfs_write_dquot(struct dquot *dquot) |
2218 | { | |
bd4c625c LT |
2219 | struct reiserfs_transaction_handle th; |
2220 | int ret, err; | |
d2d0395f | 2221 | int depth; |
bd4c625c LT |
2222 | |
2223 | reiserfs_write_lock(dquot->dq_sb); | |
2224 | ret = | |
2225 | journal_begin(&th, dquot->dq_sb, | |
2226 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
2227 | if (ret) | |
2228 | goto out; | |
d2d0395f | 2229 | depth = reiserfs_write_unlock_nested(dquot->dq_sb); |
bd4c625c | 2230 | ret = dquot_commit(dquot); |
d2d0395f | 2231 | reiserfs_write_lock_nested(dquot->dq_sb, depth); |
58d85426 | 2232 | err = journal_end(&th); |
bd4c625c LT |
2233 | if (!ret && err) |
2234 | ret = err; | |
7af11686 | 2235 | out: |
bd4c625c LT |
2236 | reiserfs_write_unlock(dquot->dq_sb); |
2237 | return ret; | |
1da177e4 LT |
2238 | } |
2239 | ||
2240 | static int reiserfs_acquire_dquot(struct dquot *dquot) | |
2241 | { | |
bd4c625c LT |
2242 | struct reiserfs_transaction_handle th; |
2243 | int ret, err; | |
d2d0395f | 2244 | int depth; |
bd4c625c LT |
2245 | |
2246 | reiserfs_write_lock(dquot->dq_sb); | |
2247 | ret = | |
2248 | journal_begin(&th, dquot->dq_sb, | |
2249 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
2250 | if (ret) | |
2251 | goto out; | |
d2d0395f | 2252 | depth = reiserfs_write_unlock_nested(dquot->dq_sb); |
bd4c625c | 2253 | ret = dquot_acquire(dquot); |
d2d0395f | 2254 | reiserfs_write_lock_nested(dquot->dq_sb, depth); |
58d85426 | 2255 | err = journal_end(&th); |
bd4c625c LT |
2256 | if (!ret && err) |
2257 | ret = err; | |
7af11686 | 2258 | out: |
bd4c625c LT |
2259 | reiserfs_write_unlock(dquot->dq_sb); |
2260 | return ret; | |
1da177e4 LT |
2261 | } |
2262 | ||
2263 | static int reiserfs_release_dquot(struct dquot *dquot) | |
2264 | { | |
bd4c625c LT |
2265 | struct reiserfs_transaction_handle th; |
2266 | int ret, err; | |
2267 | ||
2268 | reiserfs_write_lock(dquot->dq_sb); | |
2269 | ret = | |
2270 | journal_begin(&th, dquot->dq_sb, | |
2271 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
7af11686 | 2272 | reiserfs_write_unlock(dquot->dq_sb); |
9c3013e9 JK |
2273 | if (ret) { |
2274 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2275 | dquot_release(dquot); | |
bd4c625c | 2276 | goto out; |
9c3013e9 | 2277 | } |
bd4c625c | 2278 | ret = dquot_release(dquot); |
7af11686 | 2279 | reiserfs_write_lock(dquot->dq_sb); |
58d85426 | 2280 | err = journal_end(&th); |
bd4c625c LT |
2281 | if (!ret && err) |
2282 | ret = err; | |
bd4c625c | 2283 | reiserfs_write_unlock(dquot->dq_sb); |
7af11686 | 2284 | out: |
bd4c625c | 2285 | return ret; |
1da177e4 LT |
2286 | } |
2287 | ||
2288 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) | |
2289 | { | |
4506567b | 2290 | /* Are we journaling quotas? */ |
bd4c625c LT |
2291 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2292 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2293 | dquot_mark_dquot_dirty(dquot); | |
2294 | return reiserfs_write_dquot(dquot); | |
2295 | } else | |
2296 | return dquot_mark_dquot_dirty(dquot); | |
1da177e4 LT |
2297 | } |
2298 | ||
2299 | static int reiserfs_write_info(struct super_block *sb, int type) | |
2300 | { | |
bd4c625c LT |
2301 | struct reiserfs_transaction_handle th; |
2302 | int ret, err; | |
d2d0395f | 2303 | int depth; |
bd4c625c LT |
2304 | |
2305 | /* Data block + inode block */ | |
2306 | reiserfs_write_lock(sb); | |
2307 | ret = journal_begin(&th, sb, 2); | |
2308 | if (ret) | |
2309 | goto out; | |
d2d0395f | 2310 | depth = reiserfs_write_unlock_nested(sb); |
bd4c625c | 2311 | ret = dquot_commit_info(sb, type); |
d2d0395f | 2312 | reiserfs_write_lock_nested(sb, depth); |
58d85426 | 2313 | err = journal_end(&th); |
bd4c625c LT |
2314 | if (!ret && err) |
2315 | ret = err; | |
7af11686 | 2316 | out: |
bd4c625c LT |
2317 | reiserfs_write_unlock(sb); |
2318 | return ret; | |
1da177e4 LT |
2319 | } |
2320 | ||
2321 | /* | |
84de856e | 2322 | * Turn on quotas during mount time - we need to find the quota file and such... |
1da177e4 LT |
2323 | */ |
2324 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) | |
2325 | { | |
287a8095 CH |
2326 | return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
2327 | REISERFS_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2328 | } |
2329 | ||
2330 | /* | |
2331 | * Standard function to be called on quota_on | |
2332 | */ | |
bd4c625c | 2333 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 2334 | struct path *path) |
1da177e4 | 2335 | { |
bd4c625c | 2336 | int err; |
d5dee5c3 | 2337 | struct inode *inode; |
5d4f7fdd | 2338 | struct reiserfs_transaction_handle th; |
c3aa0776 | 2339 | int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; |
bd4c625c | 2340 | |
b9e06ef2 JK |
2341 | reiserfs_write_lock(sb); |
2342 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { | |
2343 | err = -EINVAL; | |
2344 | goto out; | |
2345 | } | |
307ae18a | 2346 | |
bd4c625c | 2347 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 2348 | if (path->dentry->d_sb != sb) { |
77e69dac AV |
2349 | err = -EXDEV; |
2350 | goto out; | |
bd4c625c | 2351 | } |
2b0143b5 | 2352 | inode = d_inode(path->dentry); |
098297b2 JM |
2353 | /* |
2354 | * We must not pack tails for quota files on reiserfs for quota | |
2355 | * IO to work | |
2356 | */ | |
d5dee5c3 JK |
2357 | if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
2358 | err = reiserfs_unpack(inode, NULL); | |
2359 | if (err) { | |
45b03d5e JM |
2360 | reiserfs_warning(sb, "super-6520", |
2361 | "Unpacking tail of quota file failed" | |
d5dee5c3 | 2362 | " (%d). Cannot turn on quotas.", err); |
77e69dac AV |
2363 | err = -EINVAL; |
2364 | goto out; | |
d5dee5c3 JK |
2365 | } |
2366 | mark_inode_dirty(inode); | |
bd4c625c | 2367 | } |
5d4f7fdd JK |
2368 | /* Journaling quota? */ |
2369 | if (REISERFS_SB(sb)->s_qf_names[type]) { | |
2370 | /* Quotafile not of fs root? */ | |
f00c9e44 | 2371 | if (path->dentry->d_parent != sb->s_root) |
45b03d5e JM |
2372 | reiserfs_warning(sb, "super-6521", |
2373 | "Quota file not on filesystem root. " | |
bd4c625c | 2374 | "Journalled quota will not work."); |
5d4f7fdd JK |
2375 | } |
2376 | ||
2377 | /* | |
2378 | * When we journal data on quota file, we have to flush journal to see | |
2379 | * all updates to the file when we bypass pagecache... | |
2380 | */ | |
2381 | if (reiserfs_file_data_log(inode)) { | |
2382 | /* Just start temporary transaction and finish it */ | |
2383 | err = journal_begin(&th, sb, 1); | |
2384 | if (err) | |
77e69dac | 2385 | goto out; |
58d85426 | 2386 | err = journal_end_sync(&th); |
5d4f7fdd | 2387 | if (err) |
77e69dac | 2388 | goto out; |
5d4f7fdd | 2389 | } |
b9e06ef2 JK |
2390 | reiserfs_write_unlock(sb); |
2391 | return dquot_quota_on(sb, type, format_id, path); | |
77e69dac | 2392 | out: |
b9e06ef2 | 2393 | reiserfs_write_unlock(sb); |
77e69dac | 2394 | return err; |
1da177e4 LT |
2395 | } |
2396 | ||
098297b2 JM |
2397 | /* |
2398 | * Read data from quotafile - avoid pagecache and such because we cannot afford | |
1da177e4 | 2399 | * acquiring the locks... As quota files are never truncated and quota code |
25985edc | 2400 | * itself serializes the operations (and no one else should touch the files) |
098297b2 JM |
2401 | * we don't have to be afraid of races |
2402 | */ | |
1da177e4 LT |
2403 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, |
2404 | size_t len, loff_t off) | |
2405 | { | |
bd4c625c LT |
2406 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2407 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2408 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2409 | size_t toread; | |
2410 | struct buffer_head tmp_bh, *bh; | |
2411 | loff_t i_size = i_size_read(inode); | |
2412 | ||
2413 | if (off > i_size) | |
2414 | return 0; | |
2415 | if (off + len > i_size) | |
2416 | len = i_size - off; | |
2417 | toread = len; | |
2418 | while (toread > 0) { | |
2419 | tocopy = | |
2420 | sb->s_blocksize - offset < | |
2421 | toread ? sb->s_blocksize - offset : toread; | |
2422 | tmp_bh.b_state = 0; | |
098297b2 JM |
2423 | /* |
2424 | * Quota files are without tails so we can safely | |
2425 | * use this function | |
2426 | */ | |
bd4c625c LT |
2427 | reiserfs_write_lock(sb); |
2428 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); | |
2429 | reiserfs_write_unlock(sb); | |
2430 | if (err) | |
2431 | return err; | |
2432 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
2433 | memset(data, 0, tocopy); | |
2434 | else { | |
2435 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2436 | if (!bh) | |
2437 | return -EIO; | |
2438 | memcpy(data, bh->b_data + offset, tocopy); | |
2439 | brelse(bh); | |
2440 | } | |
2441 | offset = 0; | |
2442 | toread -= tocopy; | |
2443 | data += tocopy; | |
2444 | blk++; | |
2445 | } | |
2446 | return len; | |
1da177e4 LT |
2447 | } |
2448 | ||
098297b2 JM |
2449 | /* |
2450 | * Write to quotafile (we know the transaction is already started and has | |
2451 | * enough credits) | |
2452 | */ | |
1da177e4 LT |
2453 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, |
2454 | const char *data, size_t len, loff_t off) | |
2455 | { | |
bd4c625c LT |
2456 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2457 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2458 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2459 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; | |
2460 | size_t towrite = len; | |
2461 | struct buffer_head tmp_bh, *bh; | |
2462 | ||
9c3013e9 | 2463 | if (!current->journal_info) { |
53872ed0 | 2464 | printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n", |
9c3013e9 JK |
2465 | (unsigned long long)off, (unsigned long long)len); |
2466 | return -EIO; | |
2467 | } | |
bd4c625c LT |
2468 | while (towrite > 0) { |
2469 | tocopy = sb->s_blocksize - offset < towrite ? | |
2470 | sb->s_blocksize - offset : towrite; | |
2471 | tmp_bh.b_state = 0; | |
361d94a3 | 2472 | reiserfs_write_lock(sb); |
bd4c625c | 2473 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); |
361d94a3 | 2474 | reiserfs_write_unlock(sb); |
bd4c625c LT |
2475 | if (err) |
2476 | goto out; | |
2477 | if (offset || tocopy != sb->s_blocksize) | |
2478 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2479 | else | |
2480 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
2481 | if (!bh) { | |
2482 | err = -EIO; | |
2483 | goto out; | |
2484 | } | |
2485 | lock_buffer(bh); | |
2486 | memcpy(bh->b_data + offset, data, tocopy); | |
2487 | flush_dcache_page(bh->b_page); | |
2488 | set_buffer_uptodate(bh); | |
2489 | unlock_buffer(bh); | |
361d94a3 | 2490 | reiserfs_write_lock(sb); |
bd4c625c | 2491 | reiserfs_prepare_for_journal(sb, bh, 1); |
09f1b80b | 2492 | journal_mark_dirty(current->journal_info, bh); |
bd4c625c LT |
2493 | if (!journal_quota) |
2494 | reiserfs_add_ordered_list(inode, bh); | |
361d94a3 | 2495 | reiserfs_write_unlock(sb); |
bd4c625c LT |
2496 | brelse(bh); |
2497 | offset = 0; | |
2498 | towrite -= tocopy; | |
2499 | data += tocopy; | |
2500 | blk++; | |
2501 | } | |
9c3013e9 | 2502 | out: |
67f1648d | 2503 | if (len == towrite) |
bd4c625c LT |
2504 | return err; |
2505 | if (inode->i_size < off + len - towrite) | |
2506 | i_size_write(inode, off + len - towrite); | |
2507 | inode->i_version++; | |
2508 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2509 | mark_inode_dirty(inode); | |
bd4c625c | 2510 | return len - towrite; |
1da177e4 LT |
2511 | } |
2512 | ||
2513 | #endif | |
2514 | ||
152a0836 | 2515 | static struct dentry *get_super_block(struct file_system_type *fs_type, |
454e2398 | 2516 | int flags, const char *dev_name, |
152a0836 | 2517 | void *data) |
1da177e4 | 2518 | { |
152a0836 | 2519 | return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); |
1da177e4 LT |
2520 | } |
2521 | ||
bd4c625c | 2522 | static int __init init_reiserfs_fs(void) |
1da177e4 LT |
2523 | { |
2524 | int ret; | |
2525 | ||
797d9016 JM |
2526 | ret = init_inodecache(); |
2527 | if (ret) | |
1da177e4 | 2528 | return ret; |
1da177e4 | 2529 | |
bd4c625c | 2530 | reiserfs_proc_info_global_init(); |
1da177e4 | 2531 | |
bd4c625c | 2532 | ret = register_filesystem(&reiserfs_fs_type); |
797d9016 JM |
2533 | if (ret) |
2534 | goto out; | |
1da177e4 | 2535 | |
797d9016 JM |
2536 | return 0; |
2537 | out: | |
bd4c625c LT |
2538 | reiserfs_proc_info_global_done(); |
2539 | destroy_inodecache(); | |
1da177e4 LT |
2540 | |
2541 | return ret; | |
2542 | } | |
2543 | ||
bd4c625c | 2544 | static void __exit exit_reiserfs_fs(void) |
1da177e4 | 2545 | { |
bd4c625c LT |
2546 | reiserfs_proc_info_global_done(); |
2547 | unregister_filesystem(&reiserfs_fs_type); | |
2548 | destroy_inodecache(); | |
1da177e4 LT |
2549 | } |
2550 | ||
2551 | struct file_system_type reiserfs_fs_type = { | |
bd4c625c LT |
2552 | .owner = THIS_MODULE, |
2553 | .name = "reiserfs", | |
152a0836 | 2554 | .mount = get_super_block, |
edc666e2 | 2555 | .kill_sb = reiserfs_kill_sb, |
bd4c625c | 2556 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 | 2557 | }; |
7f78e035 | 2558 | MODULE_ALIAS_FS("reiserfs"); |
1da177e4 | 2559 | |
bd4c625c LT |
2560 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
2561 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); | |
2562 | MODULE_LICENSE("GPL"); | |
1da177e4 | 2563 | |
bd4c625c LT |
2564 | module_init(init_reiserfs_fs); |
2565 | module_exit(exit_reiserfs_fs); |