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> | |
18 | #include <asm/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> | |
24 | #include <linux/buffer_head.h> | |
a5694255 | 25 | #include <linux/exportfs.h> |
74abb989 | 26 | #include <linux/quotaops.h> |
1da177e4 | 27 | #include <linux/vfs.h> |
1da177e4 LT |
28 | #include <linux/mount.h> |
29 | #include <linux/namei.h> | |
651d0623 | 30 | #include <linux/crc32.h> |
c3aa0776 | 31 | #include <linux/seq_file.h> |
1da177e4 LT |
32 | |
33 | struct file_system_type reiserfs_fs_type; | |
34 | ||
35 | static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; | |
36 | static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; | |
37 | static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; | |
38 | ||
bd4c625c | 39 | int is_reiserfs_3_5(struct reiserfs_super_block *rs) |
1da177e4 | 40 | { |
bd4c625c LT |
41 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, |
42 | strlen(reiserfs_3_5_magic_string)); | |
1da177e4 LT |
43 | } |
44 | ||
bd4c625c | 45 | int is_reiserfs_3_6(struct reiserfs_super_block *rs) |
1da177e4 | 46 | { |
bd4c625c LT |
47 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, |
48 | strlen(reiserfs_3_6_magic_string)); | |
1da177e4 LT |
49 | } |
50 | ||
bd4c625c | 51 | int is_reiserfs_jr(struct reiserfs_super_block *rs) |
1da177e4 | 52 | { |
bd4c625c LT |
53 | return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, |
54 | strlen(reiserfs_jr_magic_string)); | |
1da177e4 LT |
55 | } |
56 | ||
bd4c625c | 57 | static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) |
1da177e4 | 58 | { |
bd4c625c LT |
59 | return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || |
60 | is_reiserfs_jr(rs)); | |
1da177e4 LT |
61 | } |
62 | ||
bd4c625c | 63 | static int reiserfs_remount(struct super_block *s, int *flags, char *data); |
726c3342 | 64 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); |
c3aa0776 | 65 | void show_alloc_options(struct seq_file *seq, struct super_block *s); |
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)) | |
78 | if (!journal_end_sync(&th, s, 1)) | |
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 | ||
104 | if (s->s_flags & MS_RDONLY) | |
105 | return; | |
106 | ||
107 | spin_lock(&sbi->old_work_lock); | |
108 | if (!sbi->work_queued) { | |
109 | delay = msecs_to_jiffies(dirty_writeback_interval * 10); | |
110 | queue_delayed_work(system_long_wq, &sbi->old_work, delay); | |
111 | sbi->work_queued = 1; | |
112 | } | |
113 | spin_unlock(&sbi->old_work_lock); | |
114 | } | |
115 | ||
116 | static void cancel_old_flush(struct super_block *s) | |
117 | { | |
118 | struct reiserfs_sb_info *sbi = REISERFS_SB(s); | |
119 | ||
120 | cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); | |
121 | spin_lock(&sbi->old_work_lock); | |
122 | sbi->work_queued = 0; | |
123 | spin_unlock(&sbi->old_work_lock); | |
124 | } | |
125 | ||
c4be0c1d | 126 | static int reiserfs_freeze(struct super_block *s) |
1da177e4 | 127 | { |
bd4c625c | 128 | struct reiserfs_transaction_handle th; |
033369d1 AB |
129 | |
130 | cancel_old_flush(s); | |
131 | ||
bd4c625c LT |
132 | reiserfs_write_lock(s); |
133 | if (!(s->s_flags & MS_RDONLY)) { | |
134 | int err = journal_begin(&th, s, 1); | |
135 | if (err) { | |
136 | reiserfs_block_writes(&th); | |
137 | } else { | |
138 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
139 | 1); | |
140 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
141 | reiserfs_block_writes(&th); | |
142 | journal_end_sync(&th, s, 1); | |
143 | } | |
144 | } | |
bd4c625c | 145 | reiserfs_write_unlock(s); |
c4be0c1d | 146 | return 0; |
1da177e4 LT |
147 | } |
148 | ||
c4be0c1d | 149 | static int reiserfs_unfreeze(struct super_block *s) |
bd4c625c LT |
150 | { |
151 | reiserfs_allow_writes(s); | |
c4be0c1d | 152 | return 0; |
1da177e4 LT |
153 | } |
154 | ||
bd4c625c | 155 | extern const struct in_core_key MAX_IN_CORE_KEY; |
1da177e4 LT |
156 | |
157 | /* this is used to delete "save link" when there are no items of a | |
158 | file it points to. It can either happen if unlink is completed but | |
159 | "save unlink" removal, or if file has both unlink and truncate | |
160 | pending and as unlink completes first (because key of "save link" | |
161 | protecting unlink is bigger that a key lf "save link" which | |
162 | protects truncate), so there left no items to make truncate | |
163 | completion on */ | |
bd4c625c LT |
164 | static int remove_save_link_only(struct super_block *s, |
165 | struct reiserfs_key *key, int oid_free) | |
1da177e4 | 166 | { |
bd4c625c LT |
167 | struct reiserfs_transaction_handle th; |
168 | int err; | |
169 | ||
170 | /* we are going to do one balancing */ | |
171 | err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); | |
172 | if (err) | |
173 | return err; | |
174 | ||
175 | reiserfs_delete_solid_item(&th, NULL, key); | |
176 | if (oid_free) | |
177 | /* removals are protected by direct items */ | |
178 | reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); | |
179 | ||
180 | return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT); | |
1da177e4 | 181 | } |
bd4c625c | 182 | |
1da177e4 LT |
183 | #ifdef CONFIG_QUOTA |
184 | static int reiserfs_quota_on_mount(struct super_block *, int); | |
185 | #endif | |
bd4c625c | 186 | |
1da177e4 | 187 | /* look for uncompleted unlinks and truncates and complete them */ |
bd4c625c | 188 | static int finish_unfinished(struct super_block *s) |
1da177e4 | 189 | { |
bd4c625c LT |
190 | INITIALIZE_PATH(path); |
191 | struct cpu_key max_cpu_key, obj_key; | |
fb46f341 | 192 | struct reiserfs_key save_link_key, last_inode_key; |
bd4c625c LT |
193 | int retval = 0; |
194 | struct item_head *ih; | |
195 | struct buffer_head *bh; | |
196 | int item_pos; | |
197 | char *item; | |
198 | int done; | |
199 | struct inode *inode; | |
200 | int truncate; | |
1da177e4 | 201 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
202 | int i; |
203 | int ms_active_set; | |
f4b113ae | 204 | int quota_enabled[MAXQUOTAS]; |
1da177e4 | 205 | #endif |
bd4c625c LT |
206 | |
207 | /* compose key to look for "save" links */ | |
208 | max_cpu_key.version = KEY_FORMAT_3_5; | |
209 | max_cpu_key.on_disk_key.k_dir_id = ~0U; | |
210 | max_cpu_key.on_disk_key.k_objectid = ~0U; | |
211 | set_cpu_key_k_offset(&max_cpu_key, ~0U); | |
212 | max_cpu_key.key_length = 3; | |
1da177e4 | 213 | |
fb46f341 LW |
214 | memset(&last_inode_key, 0, sizeof(last_inode_key)); |
215 | ||
1da177e4 | 216 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
217 | /* Needed for iput() to work correctly and not trash data */ |
218 | if (s->s_flags & MS_ACTIVE) { | |
219 | ms_active_set = 0; | |
220 | } else { | |
221 | ms_active_set = 1; | |
222 | s->s_flags |= MS_ACTIVE; | |
223 | } | |
224 | /* Turn on quotas so that they are updated correctly */ | |
225 | for (i = 0; i < MAXQUOTAS; i++) { | |
f4b113ae | 226 | quota_enabled[i] = 1; |
bd4c625c | 227 | if (REISERFS_SB(s)->s_qf_names[i]) { |
f4b113ae JK |
228 | int ret; |
229 | ||
230 | if (sb_has_quota_active(s, i)) { | |
231 | quota_enabled[i] = 0; | |
232 | continue; | |
233 | } | |
234 | ret = reiserfs_quota_on_mount(s, i); | |
bd4c625c | 235 | if (ret < 0) |
45b03d5e JM |
236 | reiserfs_warning(s, "reiserfs-2500", |
237 | "cannot turn on journaled " | |
238 | "quota: error %d", ret); | |
bd4c625c LT |
239 | } |
240 | } | |
1da177e4 | 241 | #endif |
bd4c625c LT |
242 | |
243 | done = 0; | |
244 | REISERFS_SB(s)->s_is_unlinked_ok = 1; | |
245 | while (!retval) { | |
246 | retval = search_item(s, &max_cpu_key, &path); | |
247 | if (retval != ITEM_NOT_FOUND) { | |
0030b645 JM |
248 | reiserfs_error(s, "vs-2140", |
249 | "search_by_key returned %d", retval); | |
bd4c625c LT |
250 | break; |
251 | } | |
252 | ||
253 | bh = get_last_bh(&path); | |
254 | item_pos = get_item_pos(&path); | |
255 | if (item_pos != B_NR_ITEMS(bh)) { | |
45b03d5e JM |
256 | reiserfs_warning(s, "vs-2060", |
257 | "wrong position found"); | |
bd4c625c LT |
258 | break; |
259 | } | |
260 | item_pos--; | |
261 | ih = B_N_PITEM_HEAD(bh, item_pos); | |
262 | ||
263 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) | |
264 | /* there are no "save" links anymore */ | |
265 | break; | |
266 | ||
267 | save_link_key = ih->ih_key; | |
268 | if (is_indirect_le_ih(ih)) | |
269 | truncate = 1; | |
270 | else | |
271 | truncate = 0; | |
272 | ||
273 | /* reiserfs_iget needs k_dirid and k_objectid only */ | |
274 | item = B_I_PITEM(bh, ih); | |
275 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); | |
276 | obj_key.on_disk_key.k_objectid = | |
277 | le32_to_cpu(ih->ih_key.k_objectid); | |
278 | obj_key.on_disk_key.k_offset = 0; | |
279 | obj_key.on_disk_key.k_type = 0; | |
280 | ||
281 | pathrelse(&path); | |
282 | ||
283 | inode = reiserfs_iget(s, &obj_key); | |
284 | if (!inode) { | |
285 | /* the unlink almost completed, it just did not manage to remove | |
286 | "save" link and release objectid */ | |
45b03d5e | 287 | reiserfs_warning(s, "vs-2180", "iget failed for %K", |
bd4c625c LT |
288 | &obj_key); |
289 | retval = remove_save_link_only(s, &save_link_key, 1); | |
290 | continue; | |
291 | } | |
292 | ||
293 | if (!truncate && inode->i_nlink) { | |
294 | /* file is not unlinked */ | |
45b03d5e JM |
295 | reiserfs_warning(s, "vs-2185", |
296 | "file %K is not unlinked", | |
bd4c625c LT |
297 | &obj_key); |
298 | retval = remove_save_link_only(s, &save_link_key, 0); | |
299 | continue; | |
300 | } | |
7af11686 | 301 | reiserfs_write_unlock(s); |
871a2931 | 302 | dquot_initialize(inode); |
7af11686 | 303 | reiserfs_write_lock(s); |
bd4c625c LT |
304 | |
305 | if (truncate && S_ISDIR(inode->i_mode)) { | |
306 | /* We got a truncate request for a dir which is impossible. | |
307 | The only imaginable way is to execute unfinished truncate request | |
308 | then boot into old kernel, remove the file and create dir with | |
309 | the same key. */ | |
45b03d5e JM |
310 | reiserfs_warning(s, "green-2101", |
311 | "impossible truncate on a " | |
312 | "directory %k. Please report", | |
bd4c625c LT |
313 | INODE_PKEY(inode)); |
314 | retval = remove_save_link_only(s, &save_link_key, 0); | |
315 | truncate = 0; | |
316 | iput(inode); | |
317 | continue; | |
318 | } | |
319 | ||
320 | if (truncate) { | |
321 | REISERFS_I(inode)->i_flags |= | |
322 | i_link_saved_truncate_mask; | |
323 | /* not completed truncate found. New size was committed together | |
324 | with "save" link */ | |
325 | reiserfs_info(s, "Truncating %k to %Ld ..", | |
326 | INODE_PKEY(inode), inode->i_size); | |
327 | reiserfs_truncate_file(inode, | |
328 | 0 | |
329 | /*don't update modification time */ | |
330 | ); | |
331 | retval = remove_save_link(inode, truncate); | |
332 | } else { | |
333 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
334 | /* not completed unlink (rmdir) found */ | |
335 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); | |
fb46f341 LW |
336 | if (memcmp(&last_inode_key, INODE_PKEY(inode), |
337 | sizeof(last_inode_key))){ | |
338 | last_inode_key = *INODE_PKEY(inode); | |
339 | /* removal gets completed in iput */ | |
340 | retval = 0; | |
341 | } else { | |
45b03d5e JM |
342 | reiserfs_warning(s, "super-2189", "Dead loop " |
343 | "in finish_unfinished " | |
344 | "detected, just remove " | |
345 | "save link\n"); | |
fb46f341 LW |
346 | retval = remove_save_link_only(s, |
347 | &save_link_key, 0); | |
348 | } | |
bd4c625c LT |
349 | } |
350 | ||
351 | iput(inode); | |
352 | printk("done\n"); | |
353 | done++; | |
354 | } | |
355 | REISERFS_SB(s)->s_is_unlinked_ok = 0; | |
356 | ||
1da177e4 | 357 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
358 | /* Turn quotas off */ |
359 | for (i = 0; i < MAXQUOTAS; i++) { | |
f4b113ae | 360 | if (sb_dqopt(s)->files[i] && quota_enabled[i]) |
287a8095 | 361 | dquot_quota_off(s, i); |
bd4c625c LT |
362 | } |
363 | if (ms_active_set) | |
364 | /* Restore the flag back */ | |
365 | s->s_flags &= ~MS_ACTIVE; | |
1da177e4 | 366 | #endif |
bd4c625c LT |
367 | pathrelse(&path); |
368 | if (done) | |
369 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " | |
370 | "Completed\n", done); | |
371 | return retval; | |
1da177e4 | 372 | } |
bd4c625c | 373 | |
1da177e4 LT |
374 | /* to protect file being unlinked from getting lost we "safe" link files |
375 | being unlinked. This link will be deleted in the same transaction with last | |
3a4fa0a2 | 376 | item of file. mounting the filesystem we scan all these links and remove |
1da177e4 | 377 | files which almost got lost */ |
bd4c625c LT |
378 | void add_save_link(struct reiserfs_transaction_handle *th, |
379 | struct inode *inode, int truncate) | |
1da177e4 | 380 | { |
bd4c625c LT |
381 | INITIALIZE_PATH(path); |
382 | int retval; | |
383 | struct cpu_key key; | |
384 | struct item_head ih; | |
385 | __le32 link; | |
386 | ||
387 | BUG_ON(!th->t_trans_id); | |
388 | ||
389 | /* file can only get one "save link" of each kind */ | |
390 | RFALSE(truncate && | |
391 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), | |
392 | "saved link already exists for truncated inode %lx", | |
393 | (long)inode->i_ino); | |
394 | RFALSE(!truncate && | |
395 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), | |
396 | "saved link already exists for unlinked inode %lx", | |
397 | (long)inode->i_ino); | |
398 | ||
399 | /* setup key of "save" link */ | |
400 | key.version = KEY_FORMAT_3_5; | |
401 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; | |
402 | key.on_disk_key.k_objectid = inode->i_ino; | |
403 | if (!truncate) { | |
404 | /* unlink, rmdir, rename */ | |
405 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); | |
406 | set_cpu_key_k_type(&key, TYPE_DIRECT); | |
407 | ||
408 | /* item head of "safe" link */ | |
409 | make_le_item_head(&ih, &key, key.version, | |
410 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, | |
411 | 4 /*length */ , 0xffff /*free space */ ); | |
412 | } else { | |
413 | /* truncate */ | |
414 | if (S_ISDIR(inode->i_mode)) | |
45b03d5e JM |
415 | reiserfs_warning(inode->i_sb, "green-2102", |
416 | "Adding a truncate savelink for " | |
417 | "a directory %k! Please report", | |
bd4c625c LT |
418 | INODE_PKEY(inode)); |
419 | set_cpu_key_k_offset(&key, 1); | |
420 | set_cpu_key_k_type(&key, TYPE_INDIRECT); | |
421 | ||
422 | /* item head of "safe" link */ | |
423 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, | |
424 | 4 /*length */ , 0 /*free space */ ); | |
425 | } | |
426 | key.key_length = 3; | |
427 | ||
428 | /* look for its place in the tree */ | |
429 | retval = search_item(inode->i_sb, &key, &path); | |
430 | if (retval != ITEM_NOT_FOUND) { | |
431 | if (retval != -ENOSPC) | |
0030b645 JM |
432 | reiserfs_error(inode->i_sb, "vs-2100", |
433 | "search_by_key (%K) returned %d", &key, | |
434 | retval); | |
bd4c625c LT |
435 | pathrelse(&path); |
436 | return; | |
437 | } | |
1da177e4 | 438 | |
bd4c625c LT |
439 | /* body of "save" link */ |
440 | link = INODE_PKEY(inode)->k_dir_id; | |
441 | ||
25985edc | 442 | /* put "save" link into tree, don't charge quota to anyone */ |
bd4c625c LT |
443 | retval = |
444 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); | |
445 | if (retval) { | |
446 | if (retval != -ENOSPC) | |
0030b645 JM |
447 | reiserfs_error(inode->i_sb, "vs-2120", |
448 | "insert_item returned %d", retval); | |
bd4c625c LT |
449 | } else { |
450 | if (truncate) | |
451 | REISERFS_I(inode)->i_flags |= | |
452 | i_link_saved_truncate_mask; | |
453 | else | |
454 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
455 | } | |
456 | } | |
1da177e4 LT |
457 | |
458 | /* this opens transaction unlike add_save_link */ | |
bd4c625c | 459 | int remove_save_link(struct inode *inode, int truncate) |
1da177e4 | 460 | { |
bd4c625c LT |
461 | struct reiserfs_transaction_handle th; |
462 | struct reiserfs_key key; | |
463 | int err; | |
464 | ||
465 | /* we are going to do one balancing only */ | |
466 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
467 | if (err) | |
468 | return err; | |
469 | ||
470 | /* setup key of "save" link */ | |
471 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); | |
472 | key.k_objectid = INODE_PKEY(inode)->k_objectid; | |
473 | if (!truncate) { | |
474 | /* unlink, rmdir, rename */ | |
475 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, | |
476 | 1 + inode->i_sb->s_blocksize); | |
477 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); | |
478 | } else { | |
479 | /* truncate */ | |
480 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); | |
481 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); | |
482 | } | |
1da177e4 | 483 | |
bd4c625c LT |
484 | if ((truncate && |
485 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || | |
486 | (!truncate && | |
487 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) | |
488 | /* don't take quota bytes from anywhere */ | |
489 | reiserfs_delete_solid_item(&th, NULL, &key); | |
490 | if (!truncate) { | |
491 | reiserfs_release_objectid(&th, inode->i_ino); | |
492 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; | |
493 | } else | |
494 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; | |
495 | ||
496 | return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
497 | } | |
1da177e4 | 498 | |
edc666e2 | 499 | static void reiserfs_kill_sb(struct super_block *s) |
1da177e4 | 500 | { |
edc666e2 | 501 | if (REISERFS_SB(s)) { |
a9e36da6 JM |
502 | /* |
503 | * Force any pending inode evictions to occur now. Any | |
504 | * inodes to be removed that have extended attributes | |
505 | * associated with them need to clean them up before | |
506 | * we can release the extended attribute root dentries. | |
507 | * shrink_dcache_for_umount will BUG if we don't release | |
508 | * those before it's called so ->put_super is too late. | |
509 | */ | |
510 | shrink_dcache_sb(s); | |
511 | ||
512 | dput(REISERFS_SB(s)->xattr_root); | |
513 | REISERFS_SB(s)->xattr_root = NULL; | |
514 | dput(REISERFS_SB(s)->priv_root); | |
515 | REISERFS_SB(s)->priv_root = NULL; | |
bd4c625c LT |
516 | } |
517 | ||
edc666e2 DH |
518 | kill_block_super(s); |
519 | } | |
520 | ||
521 | static void reiserfs_put_super(struct super_block *s) | |
522 | { | |
523 | struct reiserfs_transaction_handle th; | |
524 | th.t_trans_id = 0; | |
bd4c625c | 525 | |
e0ccfd95 CH |
526 | dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
527 | ||
8ebc4232 | 528 | reiserfs_write_lock(s); |
6cfd0148 | 529 | |
bd4c625c LT |
530 | /* change file system state to current state if it was mounted with read-write permissions */ |
531 | if (!(s->s_flags & MS_RDONLY)) { | |
532 | if (!journal_begin(&th, s, 10)) { | |
533 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
534 | 1); | |
535 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), | |
536 | REISERFS_SB(s)->s_mount_state); | |
537 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
538 | } | |
539 | } | |
540 | ||
541 | /* note, journal_release checks for readonly mount, and can decide not | |
542 | ** to do a journal_end | |
543 | */ | |
544 | journal_release(&th, s); | |
545 | ||
5065227b | 546 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
547 | |
548 | brelse(SB_BUFFER_WITH_SB(s)); | |
549 | ||
550 | print_statistics(s); | |
551 | ||
bd4c625c | 552 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
45b03d5e | 553 | reiserfs_warning(s, "green-2005", "reserved blocks left %d", |
bd4c625c LT |
554 | REISERFS_SB(s)->reserved_blocks); |
555 | } | |
556 | ||
557 | reiserfs_proc_info_done(s); | |
558 | ||
8ebc4232 FW |
559 | reiserfs_write_unlock(s); |
560 | mutex_destroy(&REISERFS_SB(s)->lock); | |
bd4c625c LT |
561 | kfree(s->s_fs_info); |
562 | s->s_fs_info = NULL; | |
1da177e4 LT |
563 | } |
564 | ||
e18b890b | 565 | static struct kmem_cache *reiserfs_inode_cachep; |
1da177e4 LT |
566 | |
567 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) | |
568 | { | |
569 | struct reiserfs_inode_info *ei; | |
bd4c625c | 570 | ei = (struct reiserfs_inode_info *) |
e94b1766 | 571 | kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
572 | if (!ei) |
573 | return NULL; | |
0e4f6a79 AV |
574 | atomic_set(&ei->openers, 0); |
575 | mutex_init(&ei->tailpack); | |
1da177e4 LT |
576 | return &ei->vfs_inode; |
577 | } | |
578 | ||
fa0d7e3d | 579 | static void reiserfs_i_callback(struct rcu_head *head) |
1da177e4 | 580 | { |
fa0d7e3d | 581 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
582 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); |
583 | } | |
584 | ||
fa0d7e3d NP |
585 | static void reiserfs_destroy_inode(struct inode *inode) |
586 | { | |
587 | call_rcu(&inode->i_rcu, reiserfs_i_callback); | |
588 | } | |
589 | ||
51cc5068 | 590 | static void init_once(void *foo) |
1da177e4 | 591 | { |
bd4c625c | 592 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
1da177e4 | 593 | |
a35afb83 CL |
594 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
595 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 596 | } |
bd4c625c | 597 | |
1da177e4 LT |
598 | static int init_inodecache(void) |
599 | { | |
600 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", | |
bd4c625c LT |
601 | sizeof(struct |
602 | reiserfs_inode_info), | |
fffb60f9 PJ |
603 | 0, (SLAB_RECLAIM_ACCOUNT| |
604 | SLAB_MEM_SPREAD), | |
20c2df83 | 605 | init_once); |
1da177e4 LT |
606 | if (reiserfs_inode_cachep == NULL) |
607 | return -ENOMEM; | |
608 | return 0; | |
609 | } | |
610 | ||
611 | static void destroy_inodecache(void) | |
612 | { | |
8c0a8537 KS |
613 | /* |
614 | * Make sure all delayed rcu free inodes are flushed before we | |
615 | * destroy cache. | |
616 | */ | |
617 | rcu_barrier(); | |
1a1d92c1 | 618 | kmem_cache_destroy(reiserfs_inode_cachep); |
1da177e4 LT |
619 | } |
620 | ||
621 | /* we don't mark inodes dirty, we just log them */ | |
aa385729 | 622 | static void reiserfs_dirty_inode(struct inode *inode, int flags) |
bd4c625c LT |
623 | { |
624 | struct reiserfs_transaction_handle th; | |
625 | ||
626 | int err = 0; | |
dc8f6d89 FW |
627 | int lock_depth; |
628 | ||
bd4c625c | 629 | if (inode->i_sb->s_flags & MS_RDONLY) { |
45b03d5e JM |
630 | reiserfs_warning(inode->i_sb, "clm-6006", |
631 | "writing inode %lu on readonly FS", | |
bd4c625c LT |
632 | inode->i_ino); |
633 | return; | |
634 | } | |
dc8f6d89 | 635 | lock_depth = reiserfs_write_lock_once(inode->i_sb); |
bd4c625c LT |
636 | |
637 | /* this is really only used for atime updates, so they don't have | |
638 | ** to be included in O_SYNC or fsync | |
639 | */ | |
640 | err = journal_begin(&th, inode->i_sb, 1); | |
dc8f6d89 FW |
641 | if (err) |
642 | goto out; | |
643 | ||
bd4c625c LT |
644 | reiserfs_update_sd(&th, inode); |
645 | journal_end(&th, inode->i_sb, 1); | |
dc8f6d89 FW |
646 | |
647 | out: | |
648 | reiserfs_write_unlock_once(inode->i_sb, lock_depth); | |
1da177e4 LT |
649 | } |
650 | ||
c3aa0776 JK |
651 | static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) |
652 | { | |
653 | struct super_block *s = root->d_sb; | |
654 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
655 | long opts = REISERFS_SB(s)->s_mount_opt; | |
656 | ||
657 | if (opts & (1 << REISERFS_LARGETAIL)) | |
658 | seq_puts(seq, ",tails=on"); | |
659 | else if (!(opts & (1 << REISERFS_SMALLTAIL))) | |
660 | seq_puts(seq, ",notail"); | |
661 | /* tails=small is default so we don't show it */ | |
662 | ||
663 | if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) | |
664 | seq_puts(seq, ",barrier=none"); | |
665 | /* barrier=flush is default so we don't show it */ | |
666 | ||
667 | if (opts & (1 << REISERFS_ERROR_CONTINUE)) | |
668 | seq_puts(seq, ",errors=continue"); | |
669 | else if (opts & (1 << REISERFS_ERROR_PANIC)) | |
670 | seq_puts(seq, ",errors=panic"); | |
671 | /* errors=ro is default so we don't show it */ | |
672 | ||
673 | if (opts & (1 << REISERFS_DATA_LOG)) | |
674 | seq_puts(seq, ",data=journal"); | |
675 | else if (opts & (1 << REISERFS_DATA_WRITEBACK)) | |
676 | seq_puts(seq, ",data=writeback"); | |
677 | /* data=ordered is default so we don't show it */ | |
678 | ||
679 | if (opts & (1 << REISERFS_ATTRS)) | |
680 | seq_puts(seq, ",attrs"); | |
681 | ||
682 | if (opts & (1 << REISERFS_XATTRS_USER)) | |
683 | seq_puts(seq, ",user_xattr"); | |
684 | ||
685 | if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) | |
686 | seq_puts(seq, ",expose_privroot"); | |
687 | ||
688 | if (opts & (1 << REISERFS_POSIXACL)) | |
689 | seq_puts(seq, ",acl"); | |
690 | ||
691 | if (REISERFS_SB(s)->s_jdev) | |
692 | seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev); | |
693 | ||
694 | if (journal->j_max_commit_age != journal->j_default_max_commit_age) | |
695 | seq_printf(seq, ",commit=%d", journal->j_max_commit_age); | |
696 | ||
697 | #ifdef CONFIG_QUOTA | |
698 | if (REISERFS_SB(s)->s_qf_names[USRQUOTA]) | |
699 | seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]); | |
700 | else if (opts & (1 << REISERFS_USRQUOTA)) | |
701 | seq_puts(seq, ",usrquota"); | |
702 | if (REISERFS_SB(s)->s_qf_names[GRPQUOTA]) | |
703 | seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]); | |
704 | else if (opts & (1 << REISERFS_GRPQUOTA)) | |
705 | seq_puts(seq, ",grpquota"); | |
706 | if (REISERFS_SB(s)->s_jquota_fmt) { | |
707 | if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD) | |
708 | seq_puts(seq, ",jqfmt=vfsold"); | |
709 | else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0) | |
710 | seq_puts(seq, ",jqfmt=vfsv0"); | |
711 | } | |
712 | #endif | |
713 | ||
714 | /* Block allocator options */ | |
715 | if (opts & (1 << REISERFS_NO_BORDER)) | |
716 | seq_puts(seq, ",block-allocator=noborder"); | |
717 | if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) | |
718 | seq_puts(seq, ",block-allocator=no_unhashed_relocation"); | |
719 | if (opts & (1 << REISERFS_HASHED_RELOCATION)) | |
720 | seq_puts(seq, ",block-allocator=hashed_relocation"); | |
721 | if (opts & (1 << REISERFS_TEST4)) | |
722 | seq_puts(seq, ",block-allocator=test4"); | |
723 | show_alloc_options(seq, s); | |
724 | return 0; | |
725 | } | |
726 | ||
1da177e4 | 727 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
728 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
729 | size_t, loff_t); | |
730 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, | |
731 | loff_t); | |
1da177e4 LT |
732 | #endif |
733 | ||
ee9b6d61 | 734 | static const struct super_operations reiserfs_sops = { |
bd4c625c LT |
735 | .alloc_inode = reiserfs_alloc_inode, |
736 | .destroy_inode = reiserfs_destroy_inode, | |
737 | .write_inode = reiserfs_write_inode, | |
738 | .dirty_inode = reiserfs_dirty_inode, | |
845a2cc0 | 739 | .evict_inode = reiserfs_evict_inode, |
bd4c625c | 740 | .put_super = reiserfs_put_super, |
bd4c625c | 741 | .sync_fs = reiserfs_sync_fs, |
c4be0c1d TS |
742 | .freeze_fs = reiserfs_freeze, |
743 | .unfreeze_fs = reiserfs_unfreeze, | |
bd4c625c LT |
744 | .statfs = reiserfs_statfs, |
745 | .remount_fs = reiserfs_remount, | |
c3aa0776 | 746 | .show_options = reiserfs_show_options, |
1da177e4 | 747 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
748 | .quota_read = reiserfs_quota_read, |
749 | .quota_write = reiserfs_quota_write, | |
1da177e4 LT |
750 | #endif |
751 | }; | |
752 | ||
753 | #ifdef CONFIG_QUOTA | |
754 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
755 | ||
1da177e4 LT |
756 | static int reiserfs_write_dquot(struct dquot *); |
757 | static int reiserfs_acquire_dquot(struct dquot *); | |
758 | static int reiserfs_release_dquot(struct dquot *); | |
759 | static int reiserfs_mark_dquot_dirty(struct dquot *); | |
760 | static int reiserfs_write_info(struct super_block *, int); | |
f00c9e44 | 761 | static int reiserfs_quota_on(struct super_block *, int, int, struct path *); |
1da177e4 | 762 | |
61e225dc | 763 | static const struct dquot_operations reiserfs_quota_operations = { |
bd4c625c LT |
764 | .write_dquot = reiserfs_write_dquot, |
765 | .acquire_dquot = reiserfs_acquire_dquot, | |
766 | .release_dquot = reiserfs_release_dquot, | |
767 | .mark_dirty = reiserfs_mark_dquot_dirty, | |
768 | .write_info = reiserfs_write_info, | |
4103003b JK |
769 | .alloc_dquot = dquot_alloc, |
770 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
771 | }; |
772 | ||
0d54b217 | 773 | static const struct quotactl_ops reiserfs_qctl_operations = { |
bd4c625c | 774 | .quota_on = reiserfs_quota_on, |
287a8095 CH |
775 | .quota_off = dquot_quota_off, |
776 | .quota_sync = dquot_quota_sync, | |
777 | .get_info = dquot_get_dqinfo, | |
778 | .set_info = dquot_set_dqinfo, | |
779 | .get_dqblk = dquot_get_dqblk, | |
780 | .set_dqblk = dquot_set_dqblk, | |
1da177e4 LT |
781 | }; |
782 | #endif | |
783 | ||
39655164 | 784 | static const struct export_operations reiserfs_export_ops = { |
bd4c625c | 785 | .encode_fh = reiserfs_encode_fh, |
be55caf1 CH |
786 | .fh_to_dentry = reiserfs_fh_to_dentry, |
787 | .fh_to_parent = reiserfs_fh_to_parent, | |
bd4c625c | 788 | .get_parent = reiserfs_get_parent, |
bd4c625c | 789 | }; |
1da177e4 LT |
790 | |
791 | /* this struct is used in reiserfs_getopt () for containing the value for those | |
792 | mount options that have values rather than being toggles. */ | |
793 | typedef struct { | |
bd4c625c LT |
794 | char *value; |
795 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
796 | value is found, 0 is no bits are to be changed. */ | |
797 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
798 | value is found, 0 is no bits are to be changed. This is | |
799 | applied BEFORE setmask */ | |
1da177e4 LT |
800 | } arg_desc_t; |
801 | ||
802 | /* Set this bit in arg_required to allow empty arguments */ | |
803 | #define REISERFS_OPT_ALLOWEMPTY 31 | |
804 | ||
805 | /* this struct is used in reiserfs_getopt() for describing the set of reiserfs | |
806 | mount options */ | |
807 | typedef struct { | |
bd4c625c LT |
808 | char *option_name; |
809 | int arg_required; /* 0 if argument is not required, not 0 otherwise */ | |
810 | const arg_desc_t *values; /* list of values accepted by an option */ | |
811 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
812 | value is found, 0 is no bits are to be changed. */ | |
813 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
814 | value is found, 0 is no bits are to be changed. This is | |
815 | applied BEFORE setmask */ | |
1da177e4 LT |
816 | } opt_desc_t; |
817 | ||
818 | /* possible values for -o data= */ | |
819 | static const arg_desc_t logging_mode[] = { | |
bd4c625c LT |
820 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
821 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, | |
822 | {"journal", 1 << REISERFS_DATA_LOG, | |
823 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, | |
824 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, | |
825 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, | |
cd02b966 | 826 | {.value = NULL} |
1da177e4 LT |
827 | }; |
828 | ||
829 | /* possible values for -o barrier= */ | |
830 | static const arg_desc_t barrier_mode[] = { | |
bd4c625c LT |
831 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
832 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, | |
cd02b966 | 833 | {.value = NULL} |
1da177e4 LT |
834 | }; |
835 | ||
836 | /* possible values for "-o block-allocator=" and bits which are to be set in | |
837 | s_mount_opt of reiserfs specific part of in-core super block */ | |
838 | static const arg_desc_t balloc[] = { | |
bd4c625c LT |
839 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
840 | {"border", 0, 1 << REISERFS_NO_BORDER}, | |
841 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, | |
842 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, | |
843 | {"test4", 1 << REISERFS_TEST4, 0}, | |
844 | {"notest4", 0, 1 << REISERFS_TEST4}, | |
845 | {NULL, 0, 0} | |
1da177e4 LT |
846 | }; |
847 | ||
848 | static const arg_desc_t tails[] = { | |
bd4c625c LT |
849 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
850 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
851 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, | |
852 | {NULL, 0, 0} | |
1da177e4 LT |
853 | }; |
854 | ||
855 | static const arg_desc_t error_actions[] = { | |
bd4c625c LT |
856 | {"panic", 1 << REISERFS_ERROR_PANIC, |
857 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, | |
858 | {"ro-remount", 1 << REISERFS_ERROR_RO, | |
859 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, | |
1da177e4 | 860 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
bd4c625c LT |
861 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
862 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, | |
1da177e4 | 863 | #endif |
bd4c625c | 864 | {NULL, 0, 0}, |
1da177e4 LT |
865 | }; |
866 | ||
1da177e4 LT |
867 | /* proceed only one option from a list *cur - string containing of mount options |
868 | opts - array of options which are accepted | |
869 | opt_arg - if option is found and requires an argument and if it is specifed | |
870 | in the input - pointer to the argument is stored here | |
871 | bit_flags - if option requires to set a certain bit - it is set here | |
872 | return -1 if unknown option is found, opt->arg_required otherwise */ | |
bd4c625c LT |
873 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
874 | char **opt_arg, unsigned long *bit_flags) | |
1da177e4 | 875 | { |
bd4c625c | 876 | char *p; |
0222e657 | 877 | /* foo=bar, |
bd4c625c LT |
878 | ^ ^ ^ |
879 | | | +-- option_end | |
880 | | +-- arg_start | |
881 | +-- option_start | |
882 | */ | |
883 | const opt_desc_t *opt; | |
884 | const arg_desc_t *arg; | |
885 | ||
886 | p = *cur; | |
887 | ||
888 | /* assume argument cannot contain commas */ | |
889 | *cur = strchr(p, ','); | |
890 | if (*cur) { | |
891 | *(*cur) = '\0'; | |
892 | (*cur)++; | |
893 | } | |
894 | ||
895 | if (!strncmp(p, "alloc=", 6)) { | |
896 | /* Ugly special case, probably we should redo options parser so that | |
897 | it can understand several arguments for some options, also so that | |
898 | it can fill several bitfields with option values. */ | |
899 | if (reiserfs_parse_alloc_options(s, p + 6)) { | |
900 | return -1; | |
901 | } else { | |
902 | return 0; | |
903 | } | |
904 | } | |
905 | ||
906 | /* for every option in the list */ | |
907 | for (opt = opts; opt->option_name; opt++) { | |
908 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { | |
909 | if (bit_flags) { | |
910 | if (opt->clrmask == | |
911 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
912 | reiserfs_warning(s, "super-6500", |
913 | "%s not supported.\n", | |
bd4c625c LT |
914 | p); |
915 | else | |
916 | *bit_flags &= ~opt->clrmask; | |
917 | if (opt->setmask == | |
918 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
919 | reiserfs_warning(s, "super-6501", |
920 | "%s not supported.\n", | |
bd4c625c LT |
921 | p); |
922 | else | |
923 | *bit_flags |= opt->setmask; | |
924 | } | |
925 | break; | |
926 | } | |
927 | } | |
928 | if (!opt->option_name) { | |
45b03d5e JM |
929 | reiserfs_warning(s, "super-6502", |
930 | "unknown mount option \"%s\"", p); | |
bd4c625c LT |
931 | return -1; |
932 | } | |
933 | ||
934 | p += strlen(opt->option_name); | |
935 | switch (*p) { | |
936 | case '=': | |
937 | if (!opt->arg_required) { | |
45b03d5e JM |
938 | reiserfs_warning(s, "super-6503", |
939 | "the option \"%s\" does not " | |
940 | "require an argument\n", | |
bd4c625c LT |
941 | opt->option_name); |
942 | return -1; | |
943 | } | |
944 | break; | |
945 | ||
946 | case 0: | |
947 | if (opt->arg_required) { | |
45b03d5e JM |
948 | reiserfs_warning(s, "super-6504", |
949 | "the option \"%s\" requires an " | |
950 | "argument\n", opt->option_name); | |
bd4c625c LT |
951 | return -1; |
952 | } | |
953 | break; | |
954 | default: | |
45b03d5e JM |
955 | reiserfs_warning(s, "super-6505", |
956 | "head of option \"%s\" is only correct\n", | |
bd4c625c LT |
957 | opt->option_name); |
958 | return -1; | |
959 | } | |
960 | ||
961 | /* move to the argument, or to next option if argument is not required */ | |
962 | p++; | |
963 | ||
964 | if (opt->arg_required | |
965 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) | |
966 | && !strlen(p)) { | |
967 | /* this catches "option=," if not allowed */ | |
45b03d5e JM |
968 | reiserfs_warning(s, "super-6506", |
969 | "empty argument for \"%s\"\n", | |
bd4c625c LT |
970 | opt->option_name); |
971 | return -1; | |
972 | } | |
973 | ||
974 | if (!opt->values) { | |
975 | /* *=NULLopt_arg contains pointer to argument */ | |
976 | *opt_arg = p; | |
977 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); | |
978 | } | |
979 | ||
980 | /* values possible for this option are listed in opt->values */ | |
981 | for (arg = opt->values; arg->value; arg++) { | |
982 | if (!strcmp(p, arg->value)) { | |
983 | if (bit_flags) { | |
984 | *bit_flags &= ~arg->clrmask; | |
985 | *bit_flags |= arg->setmask; | |
986 | } | |
987 | return opt->arg_required; | |
988 | } | |
989 | } | |
990 | ||
45b03d5e JM |
991 | reiserfs_warning(s, "super-6506", |
992 | "bad value \"%s\" for option \"%s\"\n", p, | |
bd4c625c | 993 | opt->option_name); |
1da177e4 | 994 | return -1; |
1da177e4 LT |
995 | } |
996 | ||
997 | /* returns 0 if something is wrong in option string, 1 - otherwise */ | |
bd4c625c LT |
998 | static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */ |
999 | unsigned long *mount_options, | |
1000 | /* after the parsing phase, contains the | |
1001 | collection of bitflags defining what | |
1002 | mount options were selected. */ | |
1003 | unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */ | |
1004 | char **jdev_name, | |
00b44197 JK |
1005 | unsigned int *commit_max_age, |
1006 | char **qf_names, | |
1007 | unsigned int *qfmt) | |
1da177e4 | 1008 | { |
bd4c625c LT |
1009 | int c; |
1010 | char *arg = NULL; | |
1011 | char *pos; | |
1012 | opt_desc_t opts[] = { | |
1013 | /* Compatibility stuff, so that -o notail for old setups still work */ | |
1014 | {"tails",.arg_required = 't',.values = tails}, | |
1015 | {"notail",.clrmask = | |
1016 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
1017 | {"conv",.setmask = 1 << REISERFS_CONVERT}, | |
1018 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, | |
1019 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, | |
73422811 | 1020 | {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, |
1da177e4 | 1021 | #ifdef CONFIG_REISERFS_FS_XATTR |
bd4c625c LT |
1022 | {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
1023 | {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, | |
1da177e4 | 1024 | #else |
bd4c625c LT |
1025 | {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1026 | {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 LT |
1027 | #endif |
1028 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
bd4c625c LT |
1029 | {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
1030 | {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, | |
1da177e4 | 1031 | #else |
bd4c625c LT |
1032 | {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
1033 | {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 | 1034 | #endif |
cd02b966 | 1035 | {.option_name = "nolog"}, |
bd4c625c LT |
1036 | {"replayonly",.setmask = 1 << REPLAYONLY}, |
1037 | {"block-allocator",.arg_required = 'a',.values = balloc}, | |
1038 | {"data",.arg_required = 'd',.values = logging_mode}, | |
1039 | {"barrier",.arg_required = 'b',.values = barrier_mode}, | |
1040 | {"resize",.arg_required = 'r',.values = NULL}, | |
1041 | {"jdev",.arg_required = 'j',.values = NULL}, | |
1042 | {"nolargeio",.arg_required = 'w',.values = NULL}, | |
1043 | {"commit",.arg_required = 'c',.values = NULL}, | |
c3aa0776 JK |
1044 | {"usrquota",.setmask = 1 << REISERFS_USRQUOTA}, |
1045 | {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA}, | |
1046 | {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, | |
bd4c625c LT |
1047 | {"errors",.arg_required = 'e',.values = error_actions}, |
1048 | {"usrjquota",.arg_required = | |
1049 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
1050 | {"grpjquota",.arg_required = | |
1051 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
1052 | {"jqfmt",.arg_required = 'f',.values = NULL}, | |
cd02b966 | 1053 | {.option_name = NULL} |
bd4c625c LT |
1054 | }; |
1055 | ||
1056 | *blocks = 0; | |
1057 | if (!options || !*options) | |
1058 | /* use default configuration: create tails, journaling on, no | |
1059 | conversion to newest format */ | |
1060 | return 1; | |
1061 | ||
1062 | for (pos = options; pos;) { | |
1063 | c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); | |
1064 | if (c == -1) | |
1065 | /* wrong option is given */ | |
9a3bb301 | 1066 | return 0; |
1da177e4 | 1067 | |
bd4c625c LT |
1068 | if (c == 'r') { |
1069 | char *p; | |
1070 | ||
1071 | p = NULL; | |
1072 | /* "resize=NNN" or "resize=auto" */ | |
1073 | ||
1074 | if (!strcmp(arg, "auto")) { | |
1075 | /* From JFS code, to auto-get the size. */ | |
1076 | *blocks = | |
1077 | s->s_bdev->bd_inode->i_size >> s-> | |
1078 | s_blocksize_bits; | |
1079 | } else { | |
1080 | *blocks = simple_strtoul(arg, &p, 0); | |
1081 | if (*p != '\0') { | |
1082 | /* NNN does not look like a number */ | |
45b03d5e JM |
1083 | reiserfs_warning(s, "super-6507", |
1084 | "bad value %s for " | |
1085 | "-oresize\n", arg); | |
bd4c625c LT |
1086 | return 0; |
1087 | } | |
1088 | } | |
1da177e4 | 1089 | } |
1da177e4 | 1090 | |
bd4c625c LT |
1091 | if (c == 'c') { |
1092 | char *p = NULL; | |
1093 | unsigned long val = simple_strtoul(arg, &p, 0); | |
1094 | /* commit=NNN (time in seconds) */ | |
1095 | if (*p != '\0' || val >= (unsigned int)-1) { | |
45b03d5e JM |
1096 | reiserfs_warning(s, "super-6508", |
1097 | "bad value %s for -ocommit\n", | |
bd4c625c LT |
1098 | arg); |
1099 | return 0; | |
1100 | } | |
1101 | *commit_max_age = (unsigned int)val; | |
1da177e4 | 1102 | } |
1da177e4 | 1103 | |
bd4c625c | 1104 | if (c == 'w') { |
45b03d5e JM |
1105 | reiserfs_warning(s, "super-6509", "nolargeio option " |
1106 | "is no longer supported"); | |
36b756f2 | 1107 | return 0; |
1da177e4 | 1108 | } |
1da177e4 | 1109 | |
bd4c625c LT |
1110 | if (c == 'j') { |
1111 | if (arg && *arg && jdev_name) { | |
1112 | if (*jdev_name) { //Hm, already assigned? | |
45b03d5e JM |
1113 | reiserfs_warning(s, "super-6510", |
1114 | "journal device was " | |
1115 | "already specified to " | |
1116 | "be %s", *jdev_name); | |
bd4c625c LT |
1117 | return 0; |
1118 | } | |
1119 | *jdev_name = arg; | |
1120 | } | |
1da177e4 | 1121 | } |
bd4c625c LT |
1122 | #ifdef CONFIG_QUOTA |
1123 | if (c == 'u' || c == 'g') { | |
1124 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; | |
1125 | ||
6929f891 | 1126 | if (sb_any_quota_loaded(s) && |
00b44197 | 1127 | (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { |
45b03d5e JM |
1128 | reiserfs_warning(s, "super-6511", |
1129 | "cannot change journaled " | |
1130 | "quota options when quota " | |
1131 | "turned on."); | |
bd4c625c LT |
1132 | return 0; |
1133 | } | |
1134 | if (*arg) { /* Some filename specified? */ | |
1135 | if (REISERFS_SB(s)->s_qf_names[qtype] | |
1136 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], | |
1137 | arg)) { | |
45b03d5e JM |
1138 | reiserfs_warning(s, "super-6512", |
1139 | "%s quota file " | |
1140 | "already specified.", | |
bd4c625c LT |
1141 | QTYPE2NAME(qtype)); |
1142 | return 0; | |
1143 | } | |
1144 | if (strchr(arg, '/')) { | |
45b03d5e JM |
1145 | reiserfs_warning(s, "super-6513", |
1146 | "quotafile must be " | |
1147 | "on filesystem root."); | |
bd4c625c LT |
1148 | return 0; |
1149 | } | |
00b44197 | 1150 | qf_names[qtype] = |
bd4c625c | 1151 | kmalloc(strlen(arg) + 1, GFP_KERNEL); |
00b44197 | 1152 | if (!qf_names[qtype]) { |
45b03d5e JM |
1153 | reiserfs_warning(s, "reiserfs-2502", |
1154 | "not enough memory " | |
1155 | "for storing " | |
1156 | "quotafile name."); | |
bd4c625c LT |
1157 | return 0; |
1158 | } | |
00b44197 | 1159 | strcpy(qf_names[qtype], arg); |
c3aa0776 JK |
1160 | if (qtype == USRQUOTA) |
1161 | *mount_options |= 1 << REISERFS_USRQUOTA; | |
1162 | else | |
1163 | *mount_options |= 1 << REISERFS_GRPQUOTA; | |
bd4c625c | 1164 | } else { |
00b44197 JK |
1165 | if (qf_names[qtype] != |
1166 | REISERFS_SB(s)->s_qf_names[qtype]) | |
1167 | kfree(qf_names[qtype]); | |
1168 | qf_names[qtype] = NULL; | |
c3aa0776 JK |
1169 | if (qtype == USRQUOTA) |
1170 | *mount_options &= ~(1 << REISERFS_USRQUOTA); | |
1171 | else | |
1172 | *mount_options &= ~(1 << REISERFS_GRPQUOTA); | |
bd4c625c | 1173 | } |
1da177e4 | 1174 | } |
bd4c625c LT |
1175 | if (c == 'f') { |
1176 | if (!strcmp(arg, "vfsold")) | |
00b44197 | 1177 | *qfmt = QFMT_VFS_OLD; |
bd4c625c | 1178 | else if (!strcmp(arg, "vfsv0")) |
00b44197 | 1179 | *qfmt = QFMT_VFS_V0; |
bd4c625c | 1180 | else { |
45b03d5e JM |
1181 | reiserfs_warning(s, "super-6514", |
1182 | "unknown quota format " | |
1183 | "specified."); | |
bd4c625c LT |
1184 | return 0; |
1185 | } | |
6929f891 | 1186 | if (sb_any_quota_loaded(s) && |
00b44197 | 1187 | *qfmt != REISERFS_SB(s)->s_jquota_fmt) { |
45b03d5e JM |
1188 | reiserfs_warning(s, "super-6515", |
1189 | "cannot change journaled " | |
1190 | "quota options when quota " | |
1191 | "turned on."); | |
00b44197 JK |
1192 | return 0; |
1193 | } | |
1da177e4 | 1194 | } |
bd4c625c LT |
1195 | #else |
1196 | if (c == 'u' || c == 'g' || c == 'f') { | |
45b03d5e JM |
1197 | reiserfs_warning(s, "reiserfs-2503", "journaled " |
1198 | "quota options not supported."); | |
bd4c625c | 1199 | return 0; |
1da177e4 | 1200 | } |
bd4c625c LT |
1201 | #endif |
1202 | } | |
1203 | ||
1204 | #ifdef CONFIG_QUOTA | |
00b44197 JK |
1205 | if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
1206 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { | |
45b03d5e JM |
1207 | reiserfs_warning(s, "super-6515", |
1208 | "journaled quota format not specified."); | |
1da177e4 | 1209 | return 0; |
1da177e4 | 1210 | } |
c3aa0776 JK |
1211 | if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && |
1212 | sb_has_quota_loaded(s, USRQUOTA)) || | |
1213 | (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && | |
1214 | sb_has_quota_loaded(s, GRPQUOTA))) { | |
45b03d5e JM |
1215 | reiserfs_warning(s, "super-6516", "quota options must " |
1216 | "be present when quota is turned on."); | |
bd4c625c | 1217 | return 0; |
1da177e4 LT |
1218 | } |
1219 | #endif | |
556a2a45 | 1220 | |
bd4c625c | 1221 | return 1; |
1da177e4 LT |
1222 | } |
1223 | ||
bd4c625c LT |
1224 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1225 | { | |
1226 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | | |
1227 | (1 << REISERFS_DATA_ORDERED) | | |
1228 | (1 << REISERFS_DATA_WRITEBACK)); | |
1229 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); | |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) | |
1233 | { | |
bd4c625c LT |
1234 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1235 | if (!reiserfs_data_log(s)) { | |
1236 | switch_data_mode(s, REISERFS_DATA_LOG); | |
1237 | reiserfs_info(s, "switching to journaled data mode\n"); | |
1238 | } | |
1239 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { | |
1240 | if (!reiserfs_data_ordered(s)) { | |
1241 | switch_data_mode(s, REISERFS_DATA_ORDERED); | |
1242 | reiserfs_info(s, "switching to ordered data mode\n"); | |
1243 | } | |
1244 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { | |
1245 | if (!reiserfs_data_writeback(s)) { | |
1246 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); | |
1247 | reiserfs_info(s, "switching to writeback data mode\n"); | |
1248 | } | |
1249 | } | |
1da177e4 LT |
1250 | } |
1251 | ||
bd4c625c LT |
1252 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1253 | { | |
1254 | int flush = (1 << REISERFS_BARRIER_FLUSH); | |
1255 | int none = (1 << REISERFS_BARRIER_NONE); | |
1256 | int all_barrier = flush | none; | |
1257 | ||
1258 | if (bits & all_barrier) { | |
1259 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; | |
1260 | if (bits & flush) { | |
1261 | REISERFS_SB(s)->s_mount_opt |= flush; | |
1262 | printk("reiserfs: enabling write barrier flush mode\n"); | |
1263 | } else if (bits & none) { | |
1264 | REISERFS_SB(s)->s_mount_opt |= none; | |
1265 | printk("reiserfs: write barriers turned off\n"); | |
1266 | } | |
1267 | } | |
1da177e4 LT |
1268 | } |
1269 | ||
bd4c625c | 1270 | static void handle_attrs(struct super_block *s) |
1da177e4 | 1271 | { |
bd4c625c | 1272 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1273 | |
bd4c625c LT |
1274 | if (reiserfs_attrs(s)) { |
1275 | if (old_format_only(s)) { | |
45b03d5e JM |
1276 | reiserfs_warning(s, "super-6517", "cannot support " |
1277 | "attributes on 3.5.x disk format"); | |
bd4c625c | 1278 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1279 | return; |
1280 | } | |
bd4c625c | 1281 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
45b03d5e JM |
1282 | reiserfs_warning(s, "super-6518", "cannot support " |
1283 | "attributes until flag is set in " | |
1284 | "super-block"); | |
bd4c625c | 1285 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1286 | } |
1287 | } | |
1288 | } | |
1289 | ||
00b44197 JK |
1290 | #ifdef CONFIG_QUOTA |
1291 | static void handle_quota_files(struct super_block *s, char **qf_names, | |
1292 | unsigned int *qfmt) | |
1293 | { | |
1294 | int i; | |
1295 | ||
1296 | for (i = 0; i < MAXQUOTAS; i++) { | |
1297 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1298 | kfree(REISERFS_SB(s)->s_qf_names[i]); | |
1299 | REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; | |
1300 | } | |
a06d789b JK |
1301 | if (*qfmt) |
1302 | REISERFS_SB(s)->s_jquota_fmt = *qfmt; | |
00b44197 JK |
1303 | } |
1304 | #endif | |
1305 | ||
bd4c625c | 1306 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1da177e4 | 1307 | { |
bd4c625c LT |
1308 | struct reiserfs_super_block *rs; |
1309 | struct reiserfs_transaction_handle th; | |
1310 | unsigned long blocks; | |
1311 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; | |
1312 | unsigned long safe_mask = 0; | |
1313 | unsigned int commit_max_age = (unsigned int)-1; | |
1314 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
cdf6ccc8 | 1315 | char *new_opts = kstrdup(arg, GFP_KERNEL); |
bd4c625c | 1316 | int err; |
00b44197 JK |
1317 | char *qf_names[MAXQUOTAS]; |
1318 | unsigned int qfmt = 0; | |
1da177e4 | 1319 | #ifdef CONFIG_QUOTA |
bd4c625c | 1320 | int i; |
8ebc4232 | 1321 | #endif |
00b44197 | 1322 | |
8ebc4232 | 1323 | reiserfs_write_lock(s); |
00b44197 | 1324 | |
8ebc4232 | 1325 | #ifdef CONFIG_QUOTA |
00b44197 | 1326 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); |
1da177e4 LT |
1327 | #endif |
1328 | ||
bd4c625c | 1329 | rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1330 | |
bd4c625c | 1331 | if (!reiserfs_parse_options |
00b44197 JK |
1332 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
1333 | qf_names, &qfmt)) { | |
1da177e4 | 1334 | #ifdef CONFIG_QUOTA |
00b44197 JK |
1335 | for (i = 0; i < MAXQUOTAS; i++) |
1336 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1337 | kfree(qf_names[i]); | |
1da177e4 | 1338 | #endif |
cdf6ccc8 | 1339 | err = -EINVAL; |
3bb3e1fc | 1340 | goto out_unlock; |
bd4c625c | 1341 | } |
00b44197 JK |
1342 | #ifdef CONFIG_QUOTA |
1343 | handle_quota_files(s, qf_names, &qfmt); | |
1344 | #endif | |
bd4c625c LT |
1345 | |
1346 | handle_attrs(s); | |
1347 | ||
1348 | /* Add options that are safe here */ | |
1349 | safe_mask |= 1 << REISERFS_SMALLTAIL; | |
1350 | safe_mask |= 1 << REISERFS_LARGETAIL; | |
1351 | safe_mask |= 1 << REISERFS_NO_BORDER; | |
1352 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; | |
1353 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; | |
1354 | safe_mask |= 1 << REISERFS_TEST4; | |
1355 | safe_mask |= 1 << REISERFS_ATTRS; | |
1356 | safe_mask |= 1 << REISERFS_XATTRS_USER; | |
1357 | safe_mask |= 1 << REISERFS_POSIXACL; | |
1358 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; | |
1359 | safe_mask |= 1 << REISERFS_BARRIER_NONE; | |
1360 | safe_mask |= 1 << REISERFS_ERROR_RO; | |
1361 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; | |
1362 | safe_mask |= 1 << REISERFS_ERROR_PANIC; | |
c3aa0776 JK |
1363 | safe_mask |= 1 << REISERFS_USRQUOTA; |
1364 | safe_mask |= 1 << REISERFS_GRPQUOTA; | |
bd4c625c LT |
1365 | |
1366 | /* Update the bitmask, taking care to keep | |
1367 | * the bits we're not allowed to change here */ | |
1368 | REISERFS_SB(s)->s_mount_opt = | |
1369 | (REISERFS_SB(s)-> | |
1370 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); | |
1371 | ||
1372 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { | |
1373 | journal->j_max_commit_age = commit_max_age; | |
1374 | journal->j_max_trans_age = commit_max_age; | |
1375 | } else if (commit_max_age == 0) { | |
1376 | /* 0 means restore defaults. */ | |
1377 | journal->j_max_commit_age = journal->j_default_max_commit_age; | |
1378 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
1379 | } | |
1380 | ||
1381 | if (blocks) { | |
cdf6ccc8 MS |
1382 | err = reiserfs_resize(s, blocks); |
1383 | if (err != 0) | |
3bb3e1fc | 1384 | goto out_unlock; |
bd4c625c LT |
1385 | } |
1386 | ||
1387 | if (*mount_flags & MS_RDONLY) { | |
1388 | reiserfs_xattr_init(s, *mount_flags); | |
1389 | /* remount read-only */ | |
1390 | if (s->s_flags & MS_RDONLY) | |
1391 | /* it is read-only already */ | |
cdf6ccc8 | 1392 | goto out_ok; |
c79d967d | 1393 | |
3bb3e1fc JK |
1394 | /* |
1395 | * Drop write lock. Quota will retake it when needed and lock | |
1396 | * ordering requires calling dquot_suspend() without it. | |
1397 | */ | |
1398 | reiserfs_write_unlock(s); | |
0f0dd62f CH |
1399 | err = dquot_suspend(s, -1); |
1400 | if (err < 0) | |
c79d967d | 1401 | goto out_err; |
3bb3e1fc | 1402 | reiserfs_write_lock(s); |
c79d967d | 1403 | |
bd4c625c LT |
1404 | /* try to remount file system with read-only permissions */ |
1405 | if (sb_umount_state(rs) == REISERFS_VALID_FS | |
1406 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { | |
cdf6ccc8 | 1407 | goto out_ok; |
bd4c625c LT |
1408 | } |
1409 | ||
1410 | err = journal_begin(&th, s, 10); | |
1411 | if (err) | |
3bb3e1fc | 1412 | goto out_unlock; |
bd4c625c LT |
1413 | |
1414 | /* Mounting a rw partition read-only. */ | |
1415 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1416 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); | |
1417 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1418 | } else { | |
1419 | /* remount read-write */ | |
1420 | if (!(s->s_flags & MS_RDONLY)) { | |
1421 | reiserfs_xattr_init(s, *mount_flags); | |
cdf6ccc8 | 1422 | goto out_ok; /* We are read-write already */ |
bd4c625c LT |
1423 | } |
1424 | ||
cdf6ccc8 MS |
1425 | if (reiserfs_is_journal_aborted(journal)) { |
1426 | err = journal->j_errno; | |
3bb3e1fc | 1427 | goto out_unlock; |
cdf6ccc8 | 1428 | } |
bd4c625c LT |
1429 | |
1430 | handle_data_mode(s, mount_options); | |
1431 | handle_barrier_mode(s, mount_options); | |
1432 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1433 | s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ | |
1434 | err = journal_begin(&th, s, 10); | |
1435 | if (err) | |
3bb3e1fc | 1436 | goto out_unlock; |
bd4c625c LT |
1437 | |
1438 | /* Mount a partition which is read-only, read-write */ | |
1439 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1440 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1441 | s->s_flags &= ~MS_RDONLY; | |
1442 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
702d21c6 JM |
1443 | if (!old_format_only(s)) |
1444 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
bd4c625c LT |
1445 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
1446 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1447 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; | |
1448 | } | |
1449 | /* this will force a full flush of all journal lists */ | |
1450 | SB_JOURNAL(s)->j_must_wait = 1; | |
1451 | err = journal_end(&th, s, 10); | |
1452 | if (err) | |
3bb3e1fc | 1453 | goto out_unlock; |
bd4c625c LT |
1454 | |
1455 | if (!(*mount_flags & MS_RDONLY)) { | |
3bb3e1fc JK |
1456 | /* |
1457 | * Drop write lock. Quota will retake it when needed and lock | |
1458 | * ordering requires calling dquot_resume() without it. | |
1459 | */ | |
1460 | reiserfs_write_unlock(s); | |
0f0dd62f | 1461 | dquot_resume(s, -1); |
3bb3e1fc | 1462 | reiserfs_write_lock(s); |
bd4c625c LT |
1463 | finish_unfinished(s); |
1464 | reiserfs_xattr_init(s, *mount_flags); | |
1465 | } | |
1466 | ||
cdf6ccc8 | 1467 | out_ok: |
2a32cebd | 1468 | replace_mount_options(s, new_opts); |
8ebc4232 | 1469 | reiserfs_write_unlock(s); |
bd4c625c | 1470 | return 0; |
cdf6ccc8 | 1471 | |
3bb3e1fc JK |
1472 | out_unlock: |
1473 | reiserfs_write_unlock(s); | |
cdf6ccc8 MS |
1474 | out_err: |
1475 | kfree(new_opts); | |
1476 | return err; | |
1da177e4 LT |
1477 | } |
1478 | ||
bd4c625c | 1479 | static int read_super_block(struct super_block *s, int offset) |
1da177e4 | 1480 | { |
bd4c625c LT |
1481 | struct buffer_head *bh; |
1482 | struct reiserfs_super_block *rs; | |
1483 | int fs_blocksize; | |
1da177e4 | 1484 | |
bd4c625c LT |
1485 | bh = sb_bread(s, offset / s->s_blocksize); |
1486 | if (!bh) { | |
45b03d5e | 1487 | reiserfs_warning(s, "sh-2006", |
bd4c625c LT |
1488 | "bread failed (dev %s, block %lu, size %lu)", |
1489 | reiserfs_bdevname(s), offset / s->s_blocksize, | |
1490 | s->s_blocksize); | |
1491 | return 1; | |
1492 | } | |
1da177e4 | 1493 | |
bd4c625c LT |
1494 | rs = (struct reiserfs_super_block *)bh->b_data; |
1495 | if (!is_any_reiserfs_magic_string(rs)) { | |
1496 | brelse(bh); | |
1497 | return 1; | |
1498 | } | |
1499 | // | |
1500 | // ok, reiserfs signature (old or new) found in at the given offset | |
0222e657 | 1501 | // |
bd4c625c LT |
1502 | fs_blocksize = sb_blocksize(rs); |
1503 | brelse(bh); | |
1504 | sb_set_blocksize(s, fs_blocksize); | |
1da177e4 | 1505 | |
bd4c625c LT |
1506 | bh = sb_bread(s, offset / s->s_blocksize); |
1507 | if (!bh) { | |
45b03d5e JM |
1508 | reiserfs_warning(s, "sh-2007", |
1509 | "bread failed (dev %s, block %lu, size %lu)", | |
bd4c625c LT |
1510 | reiserfs_bdevname(s), offset / s->s_blocksize, |
1511 | s->s_blocksize); | |
1512 | return 1; | |
1513 | } | |
1da177e4 | 1514 | |
bd4c625c LT |
1515 | rs = (struct reiserfs_super_block *)bh->b_data; |
1516 | if (sb_blocksize(rs) != s->s_blocksize) { | |
45b03d5e JM |
1517 | reiserfs_warning(s, "sh-2011", "can't find a reiserfs " |
1518 | "filesystem on (dev %s, block %Lu, size %lu)", | |
bd4c625c LT |
1519 | reiserfs_bdevname(s), |
1520 | (unsigned long long)bh->b_blocknr, | |
1521 | s->s_blocksize); | |
1522 | brelse(bh); | |
1523 | return 1; | |
1524 | } | |
1da177e4 | 1525 | |
bd4c625c LT |
1526 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
1527 | brelse(bh); | |
45b03d5e JM |
1528 | reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " |
1529 | "--rebuild-tree run detected. Please run\n" | |
1530 | "reiserfsck --rebuild-tree and wait for a " | |
1531 | "completion. If that fails\n" | |
bd4c625c LT |
1532 | "get newer reiserfsprogs package"); |
1533 | return 1; | |
1da177e4 | 1534 | } |
1da177e4 | 1535 | |
bd4c625c LT |
1536 | SB_BUFFER_WITH_SB(s) = bh; |
1537 | SB_DISK_SUPER_BLOCK(s) = rs; | |
1538 | ||
1539 | if (is_reiserfs_jr(rs)) { | |
1540 | /* magic is of non-standard journal filesystem, look at s_version to | |
1541 | find which format is in use */ | |
1542 | if (sb_version(rs) == REISERFS_VERSION_2) | |
1d889d99 JM |
1543 | reiserfs_info(s, "found reiserfs format \"3.6\"" |
1544 | " with non-standard journal\n"); | |
bd4c625c | 1545 | else if (sb_version(rs) == REISERFS_VERSION_1) |
1d889d99 JM |
1546 | reiserfs_info(s, "found reiserfs format \"3.5\"" |
1547 | " with non-standard journal\n"); | |
bd4c625c | 1548 | else { |
45b03d5e JM |
1549 | reiserfs_warning(s, "sh-2012", "found unknown " |
1550 | "format \"%u\" of reiserfs with " | |
1551 | "non-standard magic", sb_version(rs)); | |
bd4c625c LT |
1552 | return 1; |
1553 | } | |
1554 | } else | |
1555 | /* s_version of standard format may contain incorrect information, | |
1556 | so we just look at the magic string */ | |
1557 | reiserfs_info(s, | |
1558 | "found reiserfs format \"%s\" with standard journal\n", | |
1559 | is_reiserfs_3_5(rs) ? "3.5" : "3.6"); | |
1560 | ||
1561 | s->s_op = &reiserfs_sops; | |
1562 | s->s_export_op = &reiserfs_export_ops; | |
1da177e4 | 1563 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
1564 | s->s_qcop = &reiserfs_qctl_operations; |
1565 | s->dq_op = &reiserfs_quota_operations; | |
1da177e4 LT |
1566 | #endif |
1567 | ||
bd4c625c LT |
1568 | /* new format is limited by the 32 bit wide i_blocks field, want to |
1569 | ** be one full block below that. | |
1570 | */ | |
1571 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; | |
1572 | return 0; | |
1da177e4 LT |
1573 | } |
1574 | ||
1da177e4 | 1575 | /* after journal replay, reread all bitmap and super blocks */ |
bd4c625c LT |
1576 | static int reread_meta_blocks(struct super_block *s) |
1577 | { | |
bd4c625c LT |
1578 | ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))); |
1579 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); | |
1580 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { | |
45b03d5e | 1581 | reiserfs_warning(s, "reiserfs-2504", "error reading the super"); |
bd4c625c LT |
1582 | return 1; |
1583 | } | |
1da177e4 | 1584 | |
bd4c625c | 1585 | return 0; |
bd4c625c | 1586 | } |
1da177e4 LT |
1587 | |
1588 | ///////////////////////////////////////////////////// | |
1589 | // hash detection stuff | |
1590 | ||
1da177e4 LT |
1591 | // if root directory is empty - we set default - Yura's - hash and |
1592 | // warn about it | |
1593 | // FIXME: we look for only one name in a directory. If tea and yura | |
1594 | // bith have the same value - we ask user to send report to the | |
1595 | // mailing list | |
bd4c625c | 1596 | static __u32 find_hash_out(struct super_block *s) |
1da177e4 | 1597 | { |
bd4c625c LT |
1598 | int retval; |
1599 | struct inode *inode; | |
1600 | struct cpu_key key; | |
1601 | INITIALIZE_PATH(path); | |
1602 | struct reiserfs_dir_entry de; | |
1603 | __u32 hash = DEFAULT_HASH; | |
1604 | ||
1605 | inode = s->s_root->d_inode; | |
1606 | ||
1607 | do { // Some serious "goto"-hater was there ;) | |
1608 | u32 teahash, r5hash, yurahash; | |
1609 | ||
1610 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); | |
1611 | retval = search_by_entry_key(s, &key, &path, &de); | |
1612 | if (retval == IO_ERROR) { | |
1613 | pathrelse(&path); | |
1614 | return UNSET_HASH; | |
1615 | } | |
1616 | if (retval == NAME_NOT_FOUND) | |
1617 | de.de_entry_num--; | |
1618 | set_de_name_and_namelen(&de); | |
1619 | if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) { | |
1620 | /* allow override in this case */ | |
1621 | if (reiserfs_rupasov_hash(s)) { | |
1622 | hash = YURA_HASH; | |
1623 | } | |
1d889d99 JM |
1624 | reiserfs_info(s, "FS seems to be empty, autodetect " |
1625 | "is using the default hash\n"); | |
bd4c625c LT |
1626 | break; |
1627 | } | |
1628 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); | |
1629 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); | |
1630 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); | |
1631 | if (((teahash == r5hash) | |
1632 | && | |
1633 | (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) | |
1634 | == r5hash)) || ((teahash == yurahash) | |
1635 | && (yurahash == | |
1636 | GET_HASH_VALUE(deh_offset | |
1637 | (& | |
1638 | (de. | |
1639 | de_deh[de. | |
1640 | de_entry_num]))))) | |
1641 | || ((r5hash == yurahash) | |
1642 | && (yurahash == | |
1643 | GET_HASH_VALUE(deh_offset | |
1644 | (&(de.de_deh[de.de_entry_num])))))) { | |
45b03d5e JM |
1645 | reiserfs_warning(s, "reiserfs-2506", "Unable to " |
1646 | "automatically detect hash function. " | |
1647 | "Please mount with -o " | |
1648 | "hash={tea,rupasov,r5}"); | |
bd4c625c LT |
1649 | hash = UNSET_HASH; |
1650 | break; | |
1651 | } | |
1652 | if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) == | |
1653 | yurahash) | |
1654 | hash = YURA_HASH; | |
1655 | else if (GET_HASH_VALUE | |
1656 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) | |
1657 | hash = TEA_HASH; | |
1658 | else if (GET_HASH_VALUE | |
1659 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) | |
1660 | hash = R5_HASH; | |
1661 | else { | |
45b03d5e JM |
1662 | reiserfs_warning(s, "reiserfs-2506", |
1663 | "Unrecognised hash function"); | |
bd4c625c LT |
1664 | hash = UNSET_HASH; |
1665 | } | |
1666 | } while (0); | |
1667 | ||
1668 | pathrelse(&path); | |
1669 | return hash; | |
1da177e4 LT |
1670 | } |
1671 | ||
1672 | // finds out which hash names are sorted with | |
bd4c625c | 1673 | static int what_hash(struct super_block *s) |
1da177e4 | 1674 | { |
bd4c625c LT |
1675 | __u32 code; |
1676 | ||
1677 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); | |
1678 | ||
1679 | /* reiserfs_hash_detect() == true if any of the hash mount options | |
1680 | ** were used. We must check them to make sure the user isn't | |
1681 | ** using a bad hash value | |
1682 | */ | |
1683 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) | |
1684 | code = find_hash_out(s); | |
1685 | ||
1686 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { | |
0222e657 JM |
1687 | /* detection has found the hash, and we must check against the |
1688 | ** mount options | |
bd4c625c LT |
1689 | */ |
1690 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { | |
45b03d5e JM |
1691 | reiserfs_warning(s, "reiserfs-2507", |
1692 | "Error, %s hash detected, " | |
bd4c625c LT |
1693 | "unable to force rupasov hash", |
1694 | reiserfs_hashname(code)); | |
1695 | code = UNSET_HASH; | |
1696 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { | |
45b03d5e JM |
1697 | reiserfs_warning(s, "reiserfs-2508", |
1698 | "Error, %s hash detected, " | |
bd4c625c LT |
1699 | "unable to force tea hash", |
1700 | reiserfs_hashname(code)); | |
1701 | code = UNSET_HASH; | |
1702 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { | |
45b03d5e JM |
1703 | reiserfs_warning(s, "reiserfs-2509", |
1704 | "Error, %s hash detected, " | |
bd4c625c LT |
1705 | "unable to force r5 hash", |
1706 | reiserfs_hashname(code)); | |
1707 | code = UNSET_HASH; | |
1708 | } | |
1709 | } else { | |
1710 | /* find_hash_out was not called or could not determine the hash */ | |
1711 | if (reiserfs_rupasov_hash(s)) { | |
1712 | code = YURA_HASH; | |
1713 | } else if (reiserfs_tea_hash(s)) { | |
1714 | code = TEA_HASH; | |
1715 | } else if (reiserfs_r5_hash(s)) { | |
1716 | code = R5_HASH; | |
1717 | } | |
1718 | } | |
1719 | ||
0222e657 | 1720 | /* if we are mounted RW, and we have a new valid hash code, update |
bd4c625c LT |
1721 | ** the super |
1722 | */ | |
1723 | if (code != UNSET_HASH && | |
1724 | !(s->s_flags & MS_RDONLY) && | |
1725 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { | |
1726 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); | |
1727 | } | |
1728 | return code; | |
1da177e4 LT |
1729 | } |
1730 | ||
1731 | // return pointer to appropriate function | |
bd4c625c | 1732 | static hashf_t hash_function(struct super_block *s) |
1da177e4 | 1733 | { |
bd4c625c LT |
1734 | switch (what_hash(s)) { |
1735 | case TEA_HASH: | |
1736 | reiserfs_info(s, "Using tea hash to sort names\n"); | |
1737 | return keyed_hash; | |
1738 | case YURA_HASH: | |
1739 | reiserfs_info(s, "Using rupasov hash to sort names\n"); | |
1740 | return yura_hash; | |
1741 | case R5_HASH: | |
1742 | reiserfs_info(s, "Using r5 hash to sort names\n"); | |
1743 | return r5_hash; | |
1744 | } | |
1745 | return NULL; | |
1da177e4 LT |
1746 | } |
1747 | ||
1748 | // this is used to set up correct value for old partitions | |
bd4c625c | 1749 | static int function2code(hashf_t func) |
1da177e4 | 1750 | { |
bd4c625c LT |
1751 | if (func == keyed_hash) |
1752 | return TEA_HASH; | |
1753 | if (func == yura_hash) | |
1754 | return YURA_HASH; | |
1755 | if (func == r5_hash) | |
1756 | return R5_HASH; | |
1da177e4 | 1757 | |
bd4c625c | 1758 | BUG(); // should never happen |
1da177e4 | 1759 | |
bd4c625c | 1760 | return 0; |
1da177e4 LT |
1761 | } |
1762 | ||
45b03d5e | 1763 | #define SWARN(silent, s, id, ...) \ |
1da177e4 | 1764 | if (!(silent)) \ |
45b03d5e | 1765 | reiserfs_warning(s, id, __VA_ARGS__) |
1da177e4 | 1766 | |
bd4c625c | 1767 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1da177e4 | 1768 | { |
bd4c625c | 1769 | struct inode *root_inode; |
bd4c625c LT |
1770 | struct reiserfs_transaction_handle th; |
1771 | int old_format = 0; | |
1772 | unsigned long blocks; | |
1773 | unsigned int commit_max_age = 0; | |
1774 | int jinit_done = 0; | |
1775 | struct reiserfs_iget_args args; | |
1776 | struct reiserfs_super_block *rs; | |
1777 | char *jdev_name; | |
1778 | struct reiserfs_sb_info *sbi; | |
1779 | int errval = -EINVAL; | |
00b44197 JK |
1780 | char *qf_names[MAXQUOTAS] = {}; |
1781 | unsigned int qfmt = 0; | |
bd4c625c | 1782 | |
cdf6ccc8 MS |
1783 | save_mount_options(s, data); |
1784 | ||
01afb213 | 1785 | sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
b7b7fa43 JM |
1786 | if (!sbi) |
1787 | return -ENOMEM; | |
bd4c625c | 1788 | s->s_fs_info = sbi; |
bd4c625c | 1789 | /* Set default values for options: non-aggressive tails, RO on errors */ |
efaa33eb AB |
1790 | sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); |
1791 | sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); | |
1792 | sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); | |
bd4c625c LT |
1793 | /* no preallocation minimum, be smart in |
1794 | reiserfs_file_write instead */ | |
efaa33eb | 1795 | sbi->s_alloc_options.preallocmin = 0; |
bd4c625c | 1796 | /* Preallocate by 16 blocks (17-1) at once */ |
efaa33eb | 1797 | sbi->s_alloc_options.preallocsize = 17; |
bd4c625c LT |
1798 | /* setup default block allocator options */ |
1799 | reiserfs_init_alloc_options(s); | |
1800 | ||
033369d1 AB |
1801 | spin_lock_init(&sbi->old_work_lock); |
1802 | INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); | |
efaa33eb AB |
1803 | mutex_init(&sbi->lock); |
1804 | sbi->lock_depth = -1; | |
8ebc4232 | 1805 | |
bd4c625c LT |
1806 | jdev_name = NULL; |
1807 | if (reiserfs_parse_options | |
1808 | (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name, | |
00b44197 | 1809 | &commit_max_age, qf_names, &qfmt) == 0) { |
f32485be | 1810 | goto error_unlocked; |
bd4c625c | 1811 | } |
c3aa0776 | 1812 | if (jdev_name && jdev_name[0]) { |
efaa33eb AB |
1813 | sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL); |
1814 | if (!sbi->s_jdev) { | |
c3aa0776 JK |
1815 | SWARN(silent, s, "", "Cannot allocate memory for " |
1816 | "journal device name"); | |
1817 | goto error; | |
1818 | } | |
1819 | } | |
00b44197 JK |
1820 | #ifdef CONFIG_QUOTA |
1821 | handle_quota_files(s, qf_names, &qfmt); | |
1822 | #endif | |
bd4c625c LT |
1823 | |
1824 | if (blocks) { | |
45b03d5e | 1825 | SWARN(silent, s, "jmacd-7", "resize option for remount only"); |
f32485be | 1826 | goto error_unlocked; |
bd4c625c LT |
1827 | } |
1828 | ||
1829 | /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ | |
1830 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) | |
1831 | old_format = 1; | |
1832 | /* try new format (64-th 1k block), which can contain reiserfs super block */ | |
1833 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { | |
45b03d5e | 1834 | SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", |
bd4c625c | 1835 | reiserfs_bdevname(s)); |
f32485be | 1836 | goto error_unlocked; |
bd4c625c LT |
1837 | } |
1838 | ||
1839 | rs = SB_DISK_SUPER_BLOCK(s); | |
1840 | /* Let's do basic sanity check to verify that underlying device is not | |
1841 | smaller than the filesystem. If the check fails then abort and scream, | |
1842 | because bad stuff will happen otherwise. */ | |
1843 | if (s->s_bdev && s->s_bdev->bd_inode | |
1844 | && i_size_read(s->s_bdev->bd_inode) < | |
1845 | sb_block_count(rs) * sb_blocksize(rs)) { | |
45b03d5e JM |
1846 | SWARN(silent, s, "", "Filesystem cannot be " |
1847 | "mounted because it is bigger than the device"); | |
1848 | SWARN(silent, s, "", "You may need to run fsck " | |
1849 | "or increase size of your LVM partition"); | |
1850 | SWARN(silent, s, "", "Or may be you forgot to " | |
1851 | "reboot after fdisk when it told you to"); | |
f32485be | 1852 | goto error_unlocked; |
bd4c625c LT |
1853 | } |
1854 | ||
1855 | sbi->s_mount_state = SB_REISERFS_STATE(s); | |
1856 | sbi->s_mount_state = REISERFS_VALID_FS; | |
1857 | ||
6f01046b | 1858 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
45b03d5e | 1859 | SWARN(silent, s, "jmacd-8", "unable to read bitmap"); |
f32485be | 1860 | goto error_unlocked; |
bd4c625c | 1861 | } |
f32485be | 1862 | |
d2c89a42 | 1863 | errval = -EINVAL; |
1da177e4 | 1864 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1865 | SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); |
1866 | SWARN(silent, s, "", "- it is slow mode for debugging."); | |
1da177e4 LT |
1867 | #endif |
1868 | ||
bd4c625c LT |
1869 | /* make data=ordered the default */ |
1870 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && | |
1871 | !reiserfs_data_writeback(s)) { | |
efaa33eb | 1872 | sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); |
bd4c625c LT |
1873 | } |
1874 | ||
1875 | if (reiserfs_data_log(s)) { | |
1876 | reiserfs_info(s, "using journaled data mode\n"); | |
1877 | } else if (reiserfs_data_ordered(s)) { | |
1878 | reiserfs_info(s, "using ordered data mode\n"); | |
1879 | } else { | |
1880 | reiserfs_info(s, "using writeback data mode\n"); | |
1881 | } | |
1882 | if (reiserfs_barrier_flush(s)) { | |
1883 | printk("reiserfs: using flush barriers\n"); | |
1884 | } | |
f32485be | 1885 | |
37c69b98 FW |
1886 | // set_device_ro(s->s_dev, 1) ; |
1887 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { | |
1888 | SWARN(silent, s, "sh-2022", | |
1889 | "unable to initialize journal space"); | |
1890 | goto error_unlocked; | |
1891 | } else { | |
1892 | jinit_done = 1; /* once this is set, journal_release must be called | |
1893 | ** if we error out of the mount | |
1894 | */ | |
1895 | } | |
1896 | ||
bd4c625c | 1897 | if (reread_meta_blocks(s)) { |
45b03d5e JM |
1898 | SWARN(silent, s, "jmacd-9", |
1899 | "unable to reread meta blocks after journal init"); | |
9b467e6e | 1900 | goto error_unlocked; |
bd4c625c LT |
1901 | } |
1902 | ||
1903 | if (replay_only(s)) | |
9b467e6e | 1904 | goto error_unlocked; |
bd4c625c LT |
1905 | |
1906 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { | |
45b03d5e JM |
1907 | SWARN(silent, s, "clm-7000", |
1908 | "Detected readonly device, marking FS readonly"); | |
bd4c625c LT |
1909 | s->s_flags |= MS_RDONLY; |
1910 | } | |
1911 | args.objectid = REISERFS_ROOT_OBJECTID; | |
1912 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; | |
1913 | root_inode = | |
1914 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, | |
1915 | reiserfs_init_locked_inode, (void *)(&args)); | |
1916 | if (!root_inode) { | |
45b03d5e | 1917 | SWARN(silent, s, "jmacd-10", "get root inode failed"); |
9b467e6e | 1918 | goto error_unlocked; |
bd4c625c LT |
1919 | } |
1920 | ||
9b467e6e FW |
1921 | /* |
1922 | * This path assumed to be called with the BKL in the old times. | |
1923 | * Now we have inherited the big reiserfs lock from it and many | |
1924 | * reiserfs helpers called in the mount path and elsewhere require | |
1925 | * this lock to be held even if it's not always necessary. Let's be | |
1926 | * conservative and hold it early. The window can be reduced after | |
1927 | * careful review of the code. | |
1928 | */ | |
1929 | reiserfs_write_lock(s); | |
1930 | ||
bd4c625c LT |
1931 | if (root_inode->i_state & I_NEW) { |
1932 | reiserfs_read_locked_inode(root_inode, &args); | |
1933 | unlock_new_inode(root_inode); | |
1934 | } | |
1935 | ||
48fde701 AV |
1936 | s->s_root = d_make_root(root_inode); |
1937 | if (!s->s_root) | |
bd4c625c | 1938 | goto error; |
bd4c625c LT |
1939 | // define and initialize hash function |
1940 | sbi->s_hash_function = hash_function(s); | |
1941 | if (sbi->s_hash_function == NULL) { | |
1942 | dput(s->s_root); | |
1943 | s->s_root = NULL; | |
1944 | goto error; | |
1945 | } | |
1946 | ||
1947 | if (is_reiserfs_3_5(rs) | |
1948 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) | |
1949 | set_bit(REISERFS_3_5, &(sbi->s_properties)); | |
e1fabd3c JM |
1950 | else if (old_format) |
1951 | set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties)); | |
bd4c625c LT |
1952 | else |
1953 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1954 | ||
1955 | if (!(s->s_flags & MS_RDONLY)) { | |
1956 | ||
1957 | errval = journal_begin(&th, s, 1); | |
1958 | if (errval) { | |
1959 | dput(s->s_root); | |
1960 | s->s_root = NULL; | |
1961 | goto error; | |
1962 | } | |
1963 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1964 | ||
1965 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
1966 | set_sb_fs_state(rs, 0); | |
1967 | ||
cb680c1b JM |
1968 | /* Clear out s_bmap_nr if it would wrap. We can handle this |
1969 | * case, but older revisions can't. This will cause the | |
1970 | * file system to fail mount on those older implementations, | |
1971 | * avoiding corruption. -jeffm */ | |
1972 | if (bmap_would_wrap(reiserfs_bmap_count(s)) && | |
1973 | sb_bmap_nr(rs) != 0) { | |
45b03d5e | 1974 | reiserfs_warning(s, "super-2030", "This file system " |
cb680c1b JM |
1975 | "claims to use %u bitmap blocks in " |
1976 | "its super block, but requires %u. " | |
1977 | "Clearing to zero.", sb_bmap_nr(rs), | |
1978 | reiserfs_bmap_count(s)); | |
1979 | ||
1980 | set_sb_bmap_nr(rs, 0); | |
1981 | } | |
1982 | ||
bd4c625c LT |
1983 | if (old_format_only(s)) { |
1984 | /* filesystem of format 3.5 either with standard or non-standard | |
1985 | journal */ | |
1986 | if (convert_reiserfs(s)) { | |
1987 | /* and -o conv is given */ | |
1988 | if (!silent) | |
1989 | reiserfs_info(s, | |
1990 | "converting 3.5 filesystem to the 3.6 format"); | |
1991 | ||
1992 | if (is_reiserfs_3_5(rs)) | |
1993 | /* put magic string of 3.6 format. 2.2 will not be able to | |
1994 | mount this filesystem anymore */ | |
1995 | memcpy(rs->s_v1.s_magic, | |
1996 | reiserfs_3_6_magic_string, | |
1997 | sizeof | |
1998 | (reiserfs_3_6_magic_string)); | |
1999 | ||
2000 | set_sb_version(rs, REISERFS_VERSION_2); | |
2001 | reiserfs_convert_objectid_map_v1(s); | |
2002 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
2003 | clear_bit(REISERFS_3_5, &(sbi->s_properties)); | |
2004 | } else if (!silent) { | |
2005 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
2006 | } | |
702d21c6 JM |
2007 | } else |
2008 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
2009 | ||
bd4c625c LT |
2010 | |
2011 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
2012 | errval = journal_end(&th, s, 1); | |
2013 | if (errval) { | |
2014 | dput(s->s_root); | |
2015 | s->s_root = NULL; | |
2016 | goto error; | |
2017 | } | |
2018 | ||
edcc37a0 AV |
2019 | if ((errval = reiserfs_lookup_privroot(s)) || |
2020 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
2021 | dput(s->s_root); |
2022 | s->s_root = NULL; | |
2023 | goto error; | |
2024 | } | |
2025 | ||
2026 | /* look for files which were to be removed in previous session */ | |
2027 | finish_unfinished(s); | |
2028 | } else { | |
2029 | if (old_format_only(s) && !silent) { | |
2030 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
2031 | } | |
2032 | ||
edcc37a0 AV |
2033 | if ((errval = reiserfs_lookup_privroot(s)) || |
2034 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
2035 | dput(s->s_root); |
2036 | s->s_root = NULL; | |
2037 | goto error; | |
2038 | } | |
2039 | } | |
2040 | // mark hash in super block: it could be unset. overwrite should be ok | |
2041 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); | |
2042 | ||
2043 | handle_attrs(s); | |
2044 | ||
2045 | reiserfs_proc_info_init(s); | |
2046 | ||
2047 | init_waitqueue_head(&(sbi->s_wait)); | |
2048 | spin_lock_init(&sbi->bitmap_lock); | |
2049 | ||
8ebc4232 FW |
2050 | reiserfs_write_unlock(s); |
2051 | ||
bd4c625c LT |
2052 | return (0); |
2053 | ||
00b44197 | 2054 | error: |
f32485be FW |
2055 | reiserfs_write_unlock(s); |
2056 | ||
2057 | error_unlocked: | |
2058 | /* kill the commit thread, free journal ram */ | |
2059 | if (jinit_done) { | |
2060 | reiserfs_write_lock(s); | |
bd4c625c | 2061 | journal_release_error(NULL, s); |
f32485be | 2062 | reiserfs_write_unlock(s); |
bd4c625c | 2063 | } |
5065227b | 2064 | |
033369d1 AB |
2065 | cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); |
2066 | ||
5065227b | 2067 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
2068 | if (SB_BUFFER_WITH_SB(s)) |
2069 | brelse(SB_BUFFER_WITH_SB(s)); | |
1da177e4 | 2070 | #ifdef CONFIG_QUOTA |
5065227b JM |
2071 | { |
2072 | int j; | |
00b44197 JK |
2073 | for (j = 0; j < MAXQUOTAS; j++) |
2074 | kfree(qf_names[j]); | |
bd4c625c | 2075 | } |
1da177e4 | 2076 | #endif |
833d304b | 2077 | kfree(sbi); |
1da177e4 | 2078 | |
bd4c625c LT |
2079 | s->s_fs_info = NULL; |
2080 | return errval; | |
1da177e4 LT |
2081 | } |
2082 | ||
726c3342 | 2083 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2084 | { |
726c3342 | 2085 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
bd4c625c LT |
2086 | |
2087 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); | |
2088 | buf->f_bfree = sb_free_blocks(rs); | |
2089 | buf->f_bavail = buf->f_bfree; | |
2090 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; | |
726c3342 | 2091 | buf->f_bsize = dentry->d_sb->s_blocksize; |
bd4c625c LT |
2092 | /* changed to accommodate gcc folks. */ |
2093 | buf->f_type = REISERFS_SUPER_MAGIC; | |
651d0623 CL |
2094 | buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); |
2095 | buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, | |
2096 | sizeof(rs->s_uuid)/2); | |
2097 | ||
bd4c625c | 2098 | return 0; |
1da177e4 LT |
2099 | } |
2100 | ||
2101 | #ifdef CONFIG_QUOTA | |
1da177e4 LT |
2102 | static int reiserfs_write_dquot(struct dquot *dquot) |
2103 | { | |
bd4c625c LT |
2104 | struct reiserfs_transaction_handle th; |
2105 | int ret, err; | |
2106 | ||
2107 | reiserfs_write_lock(dquot->dq_sb); | |
2108 | ret = | |
2109 | journal_begin(&th, dquot->dq_sb, | |
2110 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
2111 | if (ret) | |
2112 | goto out; | |
7af11686 | 2113 | reiserfs_write_unlock(dquot->dq_sb); |
bd4c625c | 2114 | ret = dquot_commit(dquot); |
7af11686 | 2115 | reiserfs_write_lock(dquot->dq_sb); |
bd4c625c LT |
2116 | err = |
2117 | journal_end(&th, dquot->dq_sb, | |
2118 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
2119 | if (!ret && err) | |
2120 | ret = err; | |
7af11686 | 2121 | out: |
bd4c625c LT |
2122 | reiserfs_write_unlock(dquot->dq_sb); |
2123 | return ret; | |
1da177e4 LT |
2124 | } |
2125 | ||
2126 | static int reiserfs_acquire_dquot(struct dquot *dquot) | |
2127 | { | |
bd4c625c LT |
2128 | struct reiserfs_transaction_handle th; |
2129 | int ret, err; | |
2130 | ||
2131 | reiserfs_write_lock(dquot->dq_sb); | |
2132 | ret = | |
2133 | journal_begin(&th, dquot->dq_sb, | |
2134 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
2135 | if (ret) | |
2136 | goto out; | |
7af11686 | 2137 | reiserfs_write_unlock(dquot->dq_sb); |
bd4c625c | 2138 | ret = dquot_acquire(dquot); |
7af11686 | 2139 | reiserfs_write_lock(dquot->dq_sb); |
bd4c625c LT |
2140 | err = |
2141 | journal_end(&th, dquot->dq_sb, | |
2142 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
2143 | if (!ret && err) | |
2144 | ret = err; | |
7af11686 | 2145 | out: |
bd4c625c LT |
2146 | reiserfs_write_unlock(dquot->dq_sb); |
2147 | return ret; | |
1da177e4 LT |
2148 | } |
2149 | ||
2150 | static int reiserfs_release_dquot(struct dquot *dquot) | |
2151 | { | |
bd4c625c LT |
2152 | struct reiserfs_transaction_handle th; |
2153 | int ret, err; | |
2154 | ||
2155 | reiserfs_write_lock(dquot->dq_sb); | |
2156 | ret = | |
2157 | journal_begin(&th, dquot->dq_sb, | |
2158 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
7af11686 | 2159 | reiserfs_write_unlock(dquot->dq_sb); |
9c3013e9 JK |
2160 | if (ret) { |
2161 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2162 | dquot_release(dquot); | |
bd4c625c | 2163 | goto out; |
9c3013e9 | 2164 | } |
bd4c625c | 2165 | ret = dquot_release(dquot); |
7af11686 | 2166 | reiserfs_write_lock(dquot->dq_sb); |
bd4c625c LT |
2167 | err = |
2168 | journal_end(&th, dquot->dq_sb, | |
2169 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
2170 | if (!ret && err) | |
2171 | ret = err; | |
bd4c625c | 2172 | reiserfs_write_unlock(dquot->dq_sb); |
7af11686 | 2173 | out: |
bd4c625c | 2174 | return ret; |
1da177e4 LT |
2175 | } |
2176 | ||
2177 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) | |
2178 | { | |
4506567b | 2179 | /* Are we journaling quotas? */ |
bd4c625c LT |
2180 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2181 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2182 | dquot_mark_dquot_dirty(dquot); | |
2183 | return reiserfs_write_dquot(dquot); | |
2184 | } else | |
2185 | return dquot_mark_dquot_dirty(dquot); | |
1da177e4 LT |
2186 | } |
2187 | ||
2188 | static int reiserfs_write_info(struct super_block *sb, int type) | |
2189 | { | |
bd4c625c LT |
2190 | struct reiserfs_transaction_handle th; |
2191 | int ret, err; | |
2192 | ||
2193 | /* Data block + inode block */ | |
2194 | reiserfs_write_lock(sb); | |
2195 | ret = journal_begin(&th, sb, 2); | |
2196 | if (ret) | |
2197 | goto out; | |
7af11686 | 2198 | reiserfs_write_unlock(sb); |
bd4c625c | 2199 | ret = dquot_commit_info(sb, type); |
7af11686 | 2200 | reiserfs_write_lock(sb); |
bd4c625c LT |
2201 | err = journal_end(&th, sb, 2); |
2202 | if (!ret && err) | |
2203 | ret = err; | |
7af11686 | 2204 | out: |
bd4c625c LT |
2205 | reiserfs_write_unlock(sb); |
2206 | return ret; | |
1da177e4 LT |
2207 | } |
2208 | ||
2209 | /* | |
84de856e | 2210 | * Turn on quotas during mount time - we need to find the quota file and such... |
1da177e4 LT |
2211 | */ |
2212 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) | |
2213 | { | |
287a8095 CH |
2214 | return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
2215 | REISERFS_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2216 | } |
2217 | ||
2218 | /* | |
2219 | * Standard function to be called on quota_on | |
2220 | */ | |
bd4c625c | 2221 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 2222 | struct path *path) |
1da177e4 | 2223 | { |
bd4c625c | 2224 | int err; |
d5dee5c3 | 2225 | struct inode *inode; |
5d4f7fdd | 2226 | struct reiserfs_transaction_handle th; |
c3aa0776 | 2227 | int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; |
bd4c625c | 2228 | |
b9e06ef2 JK |
2229 | reiserfs_write_lock(sb); |
2230 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { | |
2231 | err = -EINVAL; | |
2232 | goto out; | |
2233 | } | |
307ae18a | 2234 | |
bd4c625c | 2235 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 2236 | if (path->dentry->d_sb != sb) { |
77e69dac AV |
2237 | err = -EXDEV; |
2238 | goto out; | |
bd4c625c | 2239 | } |
f00c9e44 | 2240 | inode = path->dentry->d_inode; |
bd4c625c | 2241 | /* We must not pack tails for quota files on reiserfs for quota IO to work */ |
d5dee5c3 JK |
2242 | if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
2243 | err = reiserfs_unpack(inode, NULL); | |
2244 | if (err) { | |
45b03d5e JM |
2245 | reiserfs_warning(sb, "super-6520", |
2246 | "Unpacking tail of quota file failed" | |
d5dee5c3 | 2247 | " (%d). Cannot turn on quotas.", err); |
77e69dac AV |
2248 | err = -EINVAL; |
2249 | goto out; | |
d5dee5c3 JK |
2250 | } |
2251 | mark_inode_dirty(inode); | |
bd4c625c | 2252 | } |
5d4f7fdd JK |
2253 | /* Journaling quota? */ |
2254 | if (REISERFS_SB(sb)->s_qf_names[type]) { | |
2255 | /* Quotafile not of fs root? */ | |
f00c9e44 | 2256 | if (path->dentry->d_parent != sb->s_root) |
45b03d5e JM |
2257 | reiserfs_warning(sb, "super-6521", |
2258 | "Quota file not on filesystem root. " | |
bd4c625c | 2259 | "Journalled quota will not work."); |
5d4f7fdd JK |
2260 | } |
2261 | ||
2262 | /* | |
2263 | * When we journal data on quota file, we have to flush journal to see | |
2264 | * all updates to the file when we bypass pagecache... | |
2265 | */ | |
2266 | if (reiserfs_file_data_log(inode)) { | |
2267 | /* Just start temporary transaction and finish it */ | |
2268 | err = journal_begin(&th, sb, 1); | |
2269 | if (err) | |
77e69dac | 2270 | goto out; |
5d4f7fdd JK |
2271 | err = journal_end_sync(&th, sb, 1); |
2272 | if (err) | |
77e69dac | 2273 | goto out; |
5d4f7fdd | 2274 | } |
b9e06ef2 JK |
2275 | reiserfs_write_unlock(sb); |
2276 | return dquot_quota_on(sb, type, format_id, path); | |
77e69dac | 2277 | out: |
b9e06ef2 | 2278 | reiserfs_write_unlock(sb); |
77e69dac | 2279 | return err; |
1da177e4 LT |
2280 | } |
2281 | ||
2282 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2283 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 2284 | * itself serializes the operations (and no one else should touch the files) |
1da177e4 LT |
2285 | * we don't have to be afraid of races */ |
2286 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, | |
2287 | size_t len, loff_t off) | |
2288 | { | |
bd4c625c LT |
2289 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2290 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2291 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2292 | size_t toread; | |
2293 | struct buffer_head tmp_bh, *bh; | |
2294 | loff_t i_size = i_size_read(inode); | |
2295 | ||
2296 | if (off > i_size) | |
2297 | return 0; | |
2298 | if (off + len > i_size) | |
2299 | len = i_size - off; | |
2300 | toread = len; | |
2301 | while (toread > 0) { | |
2302 | tocopy = | |
2303 | sb->s_blocksize - offset < | |
2304 | toread ? sb->s_blocksize - offset : toread; | |
2305 | tmp_bh.b_state = 0; | |
2306 | /* Quota files are without tails so we can safely use this function */ | |
2307 | reiserfs_write_lock(sb); | |
2308 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); | |
2309 | reiserfs_write_unlock(sb); | |
2310 | if (err) | |
2311 | return err; | |
2312 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
2313 | memset(data, 0, tocopy); | |
2314 | else { | |
2315 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2316 | if (!bh) | |
2317 | return -EIO; | |
2318 | memcpy(data, bh->b_data + offset, tocopy); | |
2319 | brelse(bh); | |
2320 | } | |
2321 | offset = 0; | |
2322 | toread -= tocopy; | |
2323 | data += tocopy; | |
2324 | blk++; | |
2325 | } | |
2326 | return len; | |
1da177e4 LT |
2327 | } |
2328 | ||
2329 | /* Write to quotafile (we know the transaction is already started and has | |
2330 | * enough credits) */ | |
2331 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, | |
2332 | const char *data, size_t len, loff_t off) | |
2333 | { | |
bd4c625c LT |
2334 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2335 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2336 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2337 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; | |
2338 | size_t towrite = len; | |
2339 | struct buffer_head tmp_bh, *bh; | |
2340 | ||
9c3013e9 JK |
2341 | if (!current->journal_info) { |
2342 | printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)" | |
2343 | " cancelled because transaction is not started.\n", | |
2344 | (unsigned long long)off, (unsigned long long)len); | |
2345 | return -EIO; | |
2346 | } | |
bd4c625c LT |
2347 | while (towrite > 0) { |
2348 | tocopy = sb->s_blocksize - offset < towrite ? | |
2349 | sb->s_blocksize - offset : towrite; | |
2350 | tmp_bh.b_state = 0; | |
361d94a3 | 2351 | reiserfs_write_lock(sb); |
bd4c625c | 2352 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); |
361d94a3 | 2353 | reiserfs_write_unlock(sb); |
bd4c625c LT |
2354 | if (err) |
2355 | goto out; | |
2356 | if (offset || tocopy != sb->s_blocksize) | |
2357 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2358 | else | |
2359 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
2360 | if (!bh) { | |
2361 | err = -EIO; | |
2362 | goto out; | |
2363 | } | |
2364 | lock_buffer(bh); | |
2365 | memcpy(bh->b_data + offset, data, tocopy); | |
2366 | flush_dcache_page(bh->b_page); | |
2367 | set_buffer_uptodate(bh); | |
2368 | unlock_buffer(bh); | |
361d94a3 | 2369 | reiserfs_write_lock(sb); |
bd4c625c LT |
2370 | reiserfs_prepare_for_journal(sb, bh, 1); |
2371 | journal_mark_dirty(current->journal_info, sb, bh); | |
2372 | if (!journal_quota) | |
2373 | reiserfs_add_ordered_list(inode, bh); | |
361d94a3 | 2374 | reiserfs_write_unlock(sb); |
bd4c625c LT |
2375 | brelse(bh); |
2376 | offset = 0; | |
2377 | towrite -= tocopy; | |
2378 | data += tocopy; | |
2379 | blk++; | |
2380 | } | |
9c3013e9 | 2381 | out: |
67f1648d | 2382 | if (len == towrite) |
bd4c625c LT |
2383 | return err; |
2384 | if (inode->i_size < off + len - towrite) | |
2385 | i_size_write(inode, off + len - towrite); | |
2386 | inode->i_version++; | |
2387 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2388 | mark_inode_dirty(inode); | |
bd4c625c | 2389 | return len - towrite; |
1da177e4 LT |
2390 | } |
2391 | ||
2392 | #endif | |
2393 | ||
152a0836 | 2394 | static struct dentry *get_super_block(struct file_system_type *fs_type, |
454e2398 | 2395 | int flags, const char *dev_name, |
152a0836 | 2396 | void *data) |
1da177e4 | 2397 | { |
152a0836 | 2398 | return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); |
1da177e4 LT |
2399 | } |
2400 | ||
bd4c625c | 2401 | static int __init init_reiserfs_fs(void) |
1da177e4 LT |
2402 | { |
2403 | int ret; | |
2404 | ||
bd4c625c | 2405 | if ((ret = init_inodecache())) { |
1da177e4 LT |
2406 | return ret; |
2407 | } | |
2408 | ||
bd4c625c | 2409 | reiserfs_proc_info_global_init(); |
1da177e4 | 2410 | |
bd4c625c | 2411 | ret = register_filesystem(&reiserfs_fs_type); |
1da177e4 LT |
2412 | |
2413 | if (ret == 0) { | |
2414 | return 0; | |
2415 | } | |
2416 | ||
bd4c625c LT |
2417 | reiserfs_proc_info_global_done(); |
2418 | destroy_inodecache(); | |
1da177e4 LT |
2419 | |
2420 | return ret; | |
2421 | } | |
2422 | ||
bd4c625c | 2423 | static void __exit exit_reiserfs_fs(void) |
1da177e4 | 2424 | { |
bd4c625c LT |
2425 | reiserfs_proc_info_global_done(); |
2426 | unregister_filesystem(&reiserfs_fs_type); | |
2427 | destroy_inodecache(); | |
1da177e4 LT |
2428 | } |
2429 | ||
2430 | struct file_system_type reiserfs_fs_type = { | |
bd4c625c LT |
2431 | .owner = THIS_MODULE, |
2432 | .name = "reiserfs", | |
152a0836 | 2433 | .mount = get_super_block, |
edc666e2 | 2434 | .kill_sb = reiserfs_kill_sb, |
bd4c625c | 2435 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 | 2436 | }; |
7f78e035 | 2437 | MODULE_ALIAS_FS("reiserfs"); |
1da177e4 | 2438 | |
bd4c625c LT |
2439 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
2440 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); | |
2441 | MODULE_LICENSE("GPL"); | |
1da177e4 | 2442 | |
bd4c625c LT |
2443 | module_init(init_reiserfs_fs); |
2444 | module_exit(exit_reiserfs_fs); |