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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 LT |
14 | #include <linux/module.h> |
15 | #include <linux/vmalloc.h> | |
16 | #include <linux/time.h> | |
17 | #include <asm/uaccess.h> | |
18 | #include <linux/reiserfs_fs.h> | |
19 | #include <linux/reiserfs_acl.h> | |
20 | #include <linux/reiserfs_xattr.h> | |
1da177e4 LT |
21 | #include <linux/init.h> |
22 | #include <linux/blkdev.h> | |
23 | #include <linux/buffer_head.h> | |
a5694255 | 24 | #include <linux/exportfs.h> |
74abb989 | 25 | #include <linux/quotaops.h> |
1da177e4 | 26 | #include <linux/vfs.h> |
6b3286ed | 27 | #include <linux/mnt_namespace.h> |
1da177e4 LT |
28 | #include <linux/mount.h> |
29 | #include <linux/namei.h> | |
30 | #include <linux/quotaops.h> | |
31 | ||
32 | struct file_system_type reiserfs_fs_type; | |
33 | ||
34 | static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; | |
35 | static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; | |
36 | static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; | |
37 | ||
bd4c625c | 38 | int is_reiserfs_3_5(struct reiserfs_super_block *rs) |
1da177e4 | 39 | { |
bd4c625c LT |
40 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, |
41 | strlen(reiserfs_3_5_magic_string)); | |
1da177e4 LT |
42 | } |
43 | ||
bd4c625c | 44 | int is_reiserfs_3_6(struct reiserfs_super_block *rs) |
1da177e4 | 45 | { |
bd4c625c LT |
46 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, |
47 | strlen(reiserfs_3_6_magic_string)); | |
1da177e4 LT |
48 | } |
49 | ||
bd4c625c | 50 | int is_reiserfs_jr(struct reiserfs_super_block *rs) |
1da177e4 | 51 | { |
bd4c625c LT |
52 | return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, |
53 | strlen(reiserfs_jr_magic_string)); | |
1da177e4 LT |
54 | } |
55 | ||
bd4c625c | 56 | static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) |
1da177e4 | 57 | { |
bd4c625c LT |
58 | return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || |
59 | is_reiserfs_jr(rs)); | |
1da177e4 LT |
60 | } |
61 | ||
bd4c625c | 62 | static int reiserfs_remount(struct super_block *s, int *flags, char *data); |
726c3342 | 63 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); |
1da177e4 | 64 | |
bd4c625c | 65 | static int reiserfs_sync_fs(struct super_block *s, int wait) |
1da177e4 | 66 | { |
bd4c625c LT |
67 | if (!(s->s_flags & MS_RDONLY)) { |
68 | struct reiserfs_transaction_handle th; | |
69 | reiserfs_write_lock(s); | |
70 | if (!journal_begin(&th, s, 1)) | |
71 | if (!journal_end_sync(&th, s, 1)) | |
72 | reiserfs_flush_old_commits(s); | |
73 | s->s_dirt = 0; /* Even if it's not true. | |
74 | * We'll loop forever in sync_supers otherwise */ | |
75 | reiserfs_write_unlock(s); | |
76 | } else { | |
77 | s->s_dirt = 0; | |
78 | } | |
79 | return 0; | |
1da177e4 LT |
80 | } |
81 | ||
82 | static void reiserfs_write_super(struct super_block *s) | |
83 | { | |
bd4c625c | 84 | reiserfs_sync_fs(s, 1); |
1da177e4 LT |
85 | } |
86 | ||
bd4c625c | 87 | static void reiserfs_write_super_lockfs(struct super_block *s) |
1da177e4 | 88 | { |
bd4c625c LT |
89 | struct reiserfs_transaction_handle th; |
90 | reiserfs_write_lock(s); | |
91 | if (!(s->s_flags & MS_RDONLY)) { | |
92 | int err = journal_begin(&th, s, 1); | |
93 | if (err) { | |
94 | reiserfs_block_writes(&th); | |
95 | } else { | |
96 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
97 | 1); | |
98 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
99 | reiserfs_block_writes(&th); | |
100 | journal_end_sync(&th, s, 1); | |
101 | } | |
102 | } | |
103 | s->s_dirt = 0; | |
104 | reiserfs_write_unlock(s); | |
1da177e4 LT |
105 | } |
106 | ||
bd4c625c LT |
107 | static void reiserfs_unlockfs(struct super_block *s) |
108 | { | |
109 | reiserfs_allow_writes(s); | |
1da177e4 LT |
110 | } |
111 | ||
bd4c625c | 112 | extern const struct in_core_key MAX_IN_CORE_KEY; |
1da177e4 LT |
113 | |
114 | /* this is used to delete "save link" when there are no items of a | |
115 | file it points to. It can either happen if unlink is completed but | |
116 | "save unlink" removal, or if file has both unlink and truncate | |
117 | pending and as unlink completes first (because key of "save link" | |
118 | protecting unlink is bigger that a key lf "save link" which | |
119 | protects truncate), so there left no items to make truncate | |
120 | completion on */ | |
bd4c625c LT |
121 | static int remove_save_link_only(struct super_block *s, |
122 | struct reiserfs_key *key, int oid_free) | |
1da177e4 | 123 | { |
bd4c625c LT |
124 | struct reiserfs_transaction_handle th; |
125 | int err; | |
126 | ||
127 | /* we are going to do one balancing */ | |
128 | err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); | |
129 | if (err) | |
130 | return err; | |
131 | ||
132 | reiserfs_delete_solid_item(&th, NULL, key); | |
133 | if (oid_free) | |
134 | /* removals are protected by direct items */ | |
135 | reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); | |
136 | ||
137 | return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT); | |
1da177e4 | 138 | } |
bd4c625c | 139 | |
1da177e4 LT |
140 | #ifdef CONFIG_QUOTA |
141 | static int reiserfs_quota_on_mount(struct super_block *, int); | |
142 | #endif | |
bd4c625c | 143 | |
1da177e4 | 144 | /* look for uncompleted unlinks and truncates and complete them */ |
bd4c625c | 145 | static int finish_unfinished(struct super_block *s) |
1da177e4 | 146 | { |
bd4c625c LT |
147 | INITIALIZE_PATH(path); |
148 | struct cpu_key max_cpu_key, obj_key; | |
fb46f341 | 149 | struct reiserfs_key save_link_key, last_inode_key; |
bd4c625c LT |
150 | int retval = 0; |
151 | struct item_head *ih; | |
152 | struct buffer_head *bh; | |
153 | int item_pos; | |
154 | char *item; | |
155 | int done; | |
156 | struct inode *inode; | |
157 | int truncate; | |
1da177e4 | 158 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
159 | int i; |
160 | int ms_active_set; | |
1da177e4 | 161 | #endif |
bd4c625c LT |
162 | |
163 | /* compose key to look for "save" links */ | |
164 | max_cpu_key.version = KEY_FORMAT_3_5; | |
165 | max_cpu_key.on_disk_key.k_dir_id = ~0U; | |
166 | max_cpu_key.on_disk_key.k_objectid = ~0U; | |
167 | set_cpu_key_k_offset(&max_cpu_key, ~0U); | |
168 | max_cpu_key.key_length = 3; | |
1da177e4 | 169 | |
fb46f341 LW |
170 | memset(&last_inode_key, 0, sizeof(last_inode_key)); |
171 | ||
1da177e4 | 172 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
173 | /* Needed for iput() to work correctly and not trash data */ |
174 | if (s->s_flags & MS_ACTIVE) { | |
175 | ms_active_set = 0; | |
176 | } else { | |
177 | ms_active_set = 1; | |
178 | s->s_flags |= MS_ACTIVE; | |
179 | } | |
180 | /* Turn on quotas so that they are updated correctly */ | |
181 | for (i = 0; i < MAXQUOTAS; i++) { | |
182 | if (REISERFS_SB(s)->s_qf_names[i]) { | |
183 | int ret = reiserfs_quota_on_mount(s, i); | |
184 | if (ret < 0) | |
185 | reiserfs_warning(s, | |
4506567b | 186 | "reiserfs: cannot turn on journaled quota: error %d", |
bd4c625c LT |
187 | ret); |
188 | } | |
189 | } | |
1da177e4 | 190 | #endif |
bd4c625c LT |
191 | |
192 | done = 0; | |
193 | REISERFS_SB(s)->s_is_unlinked_ok = 1; | |
194 | while (!retval) { | |
195 | retval = search_item(s, &max_cpu_key, &path); | |
196 | if (retval != ITEM_NOT_FOUND) { | |
197 | reiserfs_warning(s, | |
198 | "vs-2140: finish_unfinished: search_by_key returned %d", | |
199 | retval); | |
200 | break; | |
201 | } | |
202 | ||
203 | bh = get_last_bh(&path); | |
204 | item_pos = get_item_pos(&path); | |
205 | if (item_pos != B_NR_ITEMS(bh)) { | |
206 | reiserfs_warning(s, | |
207 | "vs-2060: finish_unfinished: wrong position found"); | |
208 | break; | |
209 | } | |
210 | item_pos--; | |
211 | ih = B_N_PITEM_HEAD(bh, item_pos); | |
212 | ||
213 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) | |
214 | /* there are no "save" links anymore */ | |
215 | break; | |
216 | ||
217 | save_link_key = ih->ih_key; | |
218 | if (is_indirect_le_ih(ih)) | |
219 | truncate = 1; | |
220 | else | |
221 | truncate = 0; | |
222 | ||
223 | /* reiserfs_iget needs k_dirid and k_objectid only */ | |
224 | item = B_I_PITEM(bh, ih); | |
225 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); | |
226 | obj_key.on_disk_key.k_objectid = | |
227 | le32_to_cpu(ih->ih_key.k_objectid); | |
228 | obj_key.on_disk_key.k_offset = 0; | |
229 | obj_key.on_disk_key.k_type = 0; | |
230 | ||
231 | pathrelse(&path); | |
232 | ||
233 | inode = reiserfs_iget(s, &obj_key); | |
234 | if (!inode) { | |
235 | /* the unlink almost completed, it just did not manage to remove | |
236 | "save" link and release objectid */ | |
237 | reiserfs_warning(s, | |
238 | "vs-2180: finish_unfinished: iget failed for %K", | |
239 | &obj_key); | |
240 | retval = remove_save_link_only(s, &save_link_key, 1); | |
241 | continue; | |
242 | } | |
243 | ||
244 | if (!truncate && inode->i_nlink) { | |
245 | /* file is not unlinked */ | |
246 | reiserfs_warning(s, | |
247 | "vs-2185: finish_unfinished: file %K is not unlinked", | |
248 | &obj_key); | |
249 | retval = remove_save_link_only(s, &save_link_key, 0); | |
250 | continue; | |
251 | } | |
252 | DQUOT_INIT(inode); | |
253 | ||
254 | if (truncate && S_ISDIR(inode->i_mode)) { | |
255 | /* We got a truncate request for a dir which is impossible. | |
256 | The only imaginable way is to execute unfinished truncate request | |
257 | then boot into old kernel, remove the file and create dir with | |
258 | the same key. */ | |
259 | reiserfs_warning(s, | |
260 | "green-2101: impossible truncate on a directory %k. Please report", | |
261 | INODE_PKEY(inode)); | |
262 | retval = remove_save_link_only(s, &save_link_key, 0); | |
263 | truncate = 0; | |
264 | iput(inode); | |
265 | continue; | |
266 | } | |
267 | ||
268 | if (truncate) { | |
269 | REISERFS_I(inode)->i_flags |= | |
270 | i_link_saved_truncate_mask; | |
271 | /* not completed truncate found. New size was committed together | |
272 | with "save" link */ | |
273 | reiserfs_info(s, "Truncating %k to %Ld ..", | |
274 | INODE_PKEY(inode), inode->i_size); | |
275 | reiserfs_truncate_file(inode, | |
276 | 0 | |
277 | /*don't update modification time */ | |
278 | ); | |
279 | retval = remove_save_link(inode, truncate); | |
280 | } else { | |
281 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
282 | /* not completed unlink (rmdir) found */ | |
283 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); | |
fb46f341 LW |
284 | if (memcmp(&last_inode_key, INODE_PKEY(inode), |
285 | sizeof(last_inode_key))){ | |
286 | last_inode_key = *INODE_PKEY(inode); | |
287 | /* removal gets completed in iput */ | |
288 | retval = 0; | |
289 | } else { | |
290 | reiserfs_warning(s, "Dead loop in " | |
291 | "finish_unfinished detected, " | |
292 | "just remove save link\n"); | |
293 | retval = remove_save_link_only(s, | |
294 | &save_link_key, 0); | |
295 | } | |
bd4c625c LT |
296 | } |
297 | ||
298 | iput(inode); | |
299 | printk("done\n"); | |
300 | done++; | |
301 | } | |
302 | REISERFS_SB(s)->s_is_unlinked_ok = 0; | |
303 | ||
1da177e4 | 304 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
305 | /* Turn quotas off */ |
306 | for (i = 0; i < MAXQUOTAS; i++) { | |
307 | if (sb_dqopt(s)->files[i]) | |
1b445a9c | 308 | vfs_quota_off(s, i, 0); |
bd4c625c LT |
309 | } |
310 | if (ms_active_set) | |
311 | /* Restore the flag back */ | |
312 | s->s_flags &= ~MS_ACTIVE; | |
1da177e4 | 313 | #endif |
bd4c625c LT |
314 | pathrelse(&path); |
315 | if (done) | |
316 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " | |
317 | "Completed\n", done); | |
318 | return retval; | |
1da177e4 | 319 | } |
bd4c625c | 320 | |
1da177e4 LT |
321 | /* to protect file being unlinked from getting lost we "safe" link files |
322 | being unlinked. This link will be deleted in the same transaction with last | |
3a4fa0a2 | 323 | item of file. mounting the filesystem we scan all these links and remove |
1da177e4 | 324 | files which almost got lost */ |
bd4c625c LT |
325 | void add_save_link(struct reiserfs_transaction_handle *th, |
326 | struct inode *inode, int truncate) | |
1da177e4 | 327 | { |
bd4c625c LT |
328 | INITIALIZE_PATH(path); |
329 | int retval; | |
330 | struct cpu_key key; | |
331 | struct item_head ih; | |
332 | __le32 link; | |
333 | ||
334 | BUG_ON(!th->t_trans_id); | |
335 | ||
336 | /* file can only get one "save link" of each kind */ | |
337 | RFALSE(truncate && | |
338 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), | |
339 | "saved link already exists for truncated inode %lx", | |
340 | (long)inode->i_ino); | |
341 | RFALSE(!truncate && | |
342 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), | |
343 | "saved link already exists for unlinked inode %lx", | |
344 | (long)inode->i_ino); | |
345 | ||
346 | /* setup key of "save" link */ | |
347 | key.version = KEY_FORMAT_3_5; | |
348 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; | |
349 | key.on_disk_key.k_objectid = inode->i_ino; | |
350 | if (!truncate) { | |
351 | /* unlink, rmdir, rename */ | |
352 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); | |
353 | set_cpu_key_k_type(&key, TYPE_DIRECT); | |
354 | ||
355 | /* item head of "safe" link */ | |
356 | make_le_item_head(&ih, &key, key.version, | |
357 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, | |
358 | 4 /*length */ , 0xffff /*free space */ ); | |
359 | } else { | |
360 | /* truncate */ | |
361 | if (S_ISDIR(inode->i_mode)) | |
362 | reiserfs_warning(inode->i_sb, | |
363 | "green-2102: Adding a truncate savelink for a directory %k! Please report", | |
364 | INODE_PKEY(inode)); | |
365 | set_cpu_key_k_offset(&key, 1); | |
366 | set_cpu_key_k_type(&key, TYPE_INDIRECT); | |
367 | ||
368 | /* item head of "safe" link */ | |
369 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, | |
370 | 4 /*length */ , 0 /*free space */ ); | |
371 | } | |
372 | key.key_length = 3; | |
373 | ||
374 | /* look for its place in the tree */ | |
375 | retval = search_item(inode->i_sb, &key, &path); | |
376 | if (retval != ITEM_NOT_FOUND) { | |
377 | if (retval != -ENOSPC) | |
378 | reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:" | |
379 | "search_by_key (%K) returned %d", &key, | |
380 | retval); | |
381 | pathrelse(&path); | |
382 | return; | |
383 | } | |
1da177e4 | 384 | |
bd4c625c LT |
385 | /* body of "save" link */ |
386 | link = INODE_PKEY(inode)->k_dir_id; | |
387 | ||
388 | /* put "save" link inot tree, don't charge quota to anyone */ | |
389 | retval = | |
390 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); | |
391 | if (retval) { | |
392 | if (retval != -ENOSPC) | |
393 | reiserfs_warning(inode->i_sb, | |
394 | "vs-2120: add_save_link: insert_item returned %d", | |
395 | retval); | |
396 | } else { | |
397 | if (truncate) | |
398 | REISERFS_I(inode)->i_flags |= | |
399 | i_link_saved_truncate_mask; | |
400 | else | |
401 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
402 | } | |
403 | } | |
1da177e4 LT |
404 | |
405 | /* this opens transaction unlike add_save_link */ | |
bd4c625c | 406 | int remove_save_link(struct inode *inode, int truncate) |
1da177e4 | 407 | { |
bd4c625c LT |
408 | struct reiserfs_transaction_handle th; |
409 | struct reiserfs_key key; | |
410 | int err; | |
411 | ||
412 | /* we are going to do one balancing only */ | |
413 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
414 | if (err) | |
415 | return err; | |
416 | ||
417 | /* setup key of "save" link */ | |
418 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); | |
419 | key.k_objectid = INODE_PKEY(inode)->k_objectid; | |
420 | if (!truncate) { | |
421 | /* unlink, rmdir, rename */ | |
422 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, | |
423 | 1 + inode->i_sb->s_blocksize); | |
424 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); | |
425 | } else { | |
426 | /* truncate */ | |
427 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); | |
428 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); | |
429 | } | |
1da177e4 | 430 | |
bd4c625c LT |
431 | if ((truncate && |
432 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || | |
433 | (!truncate && | |
434 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) | |
435 | /* don't take quota bytes from anywhere */ | |
436 | reiserfs_delete_solid_item(&th, NULL, &key); | |
437 | if (!truncate) { | |
438 | reiserfs_release_objectid(&th, inode->i_ino); | |
439 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; | |
440 | } else | |
441 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; | |
442 | ||
443 | return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
444 | } | |
1da177e4 | 445 | |
edc666e2 | 446 | static void reiserfs_kill_sb(struct super_block *s) |
1da177e4 | 447 | { |
edc666e2 | 448 | if (REISERFS_SB(s)) { |
fe08a9d4 | 449 | #ifdef CONFIG_REISERFS_FS_XATTR |
edc666e2 DH |
450 | if (REISERFS_SB(s)->xattr_root) { |
451 | d_invalidate(REISERFS_SB(s)->xattr_root); | |
452 | dput(REISERFS_SB(s)->xattr_root); | |
453 | REISERFS_SB(s)->xattr_root = NULL; | |
454 | } | |
fe08a9d4 | 455 | #endif |
edc666e2 DH |
456 | if (REISERFS_SB(s)->priv_root) { |
457 | d_invalidate(REISERFS_SB(s)->priv_root); | |
458 | dput(REISERFS_SB(s)->priv_root); | |
459 | REISERFS_SB(s)->priv_root = NULL; | |
460 | } | |
bd4c625c LT |
461 | } |
462 | ||
edc666e2 DH |
463 | kill_block_super(s); |
464 | } | |
465 | ||
466 | static void reiserfs_put_super(struct super_block *s) | |
467 | { | |
468 | struct reiserfs_transaction_handle th; | |
469 | th.t_trans_id = 0; | |
bd4c625c LT |
470 | |
471 | /* change file system state to current state if it was mounted with read-write permissions */ | |
472 | if (!(s->s_flags & MS_RDONLY)) { | |
473 | if (!journal_begin(&th, s, 10)) { | |
474 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
475 | 1); | |
476 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), | |
477 | REISERFS_SB(s)->s_mount_state); | |
478 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
479 | } | |
480 | } | |
481 | ||
482 | /* note, journal_release checks for readonly mount, and can decide not | |
483 | ** to do a journal_end | |
484 | */ | |
485 | journal_release(&th, s); | |
486 | ||
5065227b | 487 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
488 | |
489 | brelse(SB_BUFFER_WITH_SB(s)); | |
490 | ||
491 | print_statistics(s); | |
492 | ||
bd4c625c LT |
493 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
494 | reiserfs_warning(s, | |
495 | "green-2005: reiserfs_put_super: reserved blocks left %d", | |
496 | REISERFS_SB(s)->reserved_blocks); | |
497 | } | |
498 | ||
499 | reiserfs_proc_info_done(s); | |
500 | ||
501 | kfree(s->s_fs_info); | |
502 | s->s_fs_info = NULL; | |
503 | ||
504 | return; | |
1da177e4 LT |
505 | } |
506 | ||
e18b890b | 507 | static struct kmem_cache *reiserfs_inode_cachep; |
1da177e4 LT |
508 | |
509 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) | |
510 | { | |
511 | struct reiserfs_inode_info *ei; | |
bd4c625c | 512 | ei = (struct reiserfs_inode_info *) |
e94b1766 | 513 | kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
514 | if (!ei) |
515 | return NULL; | |
516 | return &ei->vfs_inode; | |
517 | } | |
518 | ||
519 | static void reiserfs_destroy_inode(struct inode *inode) | |
520 | { | |
521 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); | |
522 | } | |
523 | ||
51cc5068 | 524 | static void init_once(void *foo) |
1da177e4 | 525 | { |
bd4c625c | 526 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
1da177e4 | 527 | |
a35afb83 CL |
528 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
529 | inode_init_once(&ei->vfs_inode); | |
cfe14677 | 530 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
a35afb83 CL |
531 | ei->i_acl_access = NULL; |
532 | ei->i_acl_default = NULL; | |
cfe14677 | 533 | #endif |
1da177e4 | 534 | } |
bd4c625c | 535 | |
1da177e4 LT |
536 | static int init_inodecache(void) |
537 | { | |
538 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", | |
bd4c625c LT |
539 | sizeof(struct |
540 | reiserfs_inode_info), | |
fffb60f9 PJ |
541 | 0, (SLAB_RECLAIM_ACCOUNT| |
542 | SLAB_MEM_SPREAD), | |
20c2df83 | 543 | init_once); |
1da177e4 LT |
544 | if (reiserfs_inode_cachep == NULL) |
545 | return -ENOMEM; | |
546 | return 0; | |
547 | } | |
548 | ||
549 | static void destroy_inodecache(void) | |
550 | { | |
1a1d92c1 | 551 | kmem_cache_destroy(reiserfs_inode_cachep); |
1da177e4 LT |
552 | } |
553 | ||
554 | /* we don't mark inodes dirty, we just log them */ | |
bd4c625c LT |
555 | static void reiserfs_dirty_inode(struct inode *inode) |
556 | { | |
557 | struct reiserfs_transaction_handle th; | |
558 | ||
559 | int err = 0; | |
560 | if (inode->i_sb->s_flags & MS_RDONLY) { | |
561 | reiserfs_warning(inode->i_sb, | |
562 | "clm-6006: writing inode %lu on readonly FS", | |
563 | inode->i_ino); | |
564 | return; | |
565 | } | |
566 | reiserfs_write_lock(inode->i_sb); | |
567 | ||
568 | /* this is really only used for atime updates, so they don't have | |
569 | ** to be included in O_SYNC or fsync | |
570 | */ | |
571 | err = journal_begin(&th, inode->i_sb, 1); | |
572 | if (err) { | |
573 | reiserfs_write_unlock(inode->i_sb); | |
574 | return; | |
575 | } | |
576 | reiserfs_update_sd(&th, inode); | |
577 | journal_end(&th, inode->i_sb, 1); | |
578 | reiserfs_write_unlock(inode->i_sb); | |
1da177e4 LT |
579 | } |
580 | ||
cfe14677 | 581 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
bd4c625c | 582 | static void reiserfs_clear_inode(struct inode *inode) |
1da177e4 | 583 | { |
bd4c625c | 584 | struct posix_acl *acl; |
1da177e4 | 585 | |
bd4c625c LT |
586 | acl = REISERFS_I(inode)->i_acl_access; |
587 | if (acl && !IS_ERR(acl)) | |
588 | posix_acl_release(acl); | |
589 | REISERFS_I(inode)->i_acl_access = NULL; | |
1da177e4 | 590 | |
bd4c625c LT |
591 | acl = REISERFS_I(inode)->i_acl_default; |
592 | if (acl && !IS_ERR(acl)) | |
593 | posix_acl_release(acl); | |
594 | REISERFS_I(inode)->i_acl_default = NULL; | |
1da177e4 | 595 | } |
cfe14677 AD |
596 | #else |
597 | #define reiserfs_clear_inode NULL | |
598 | #endif | |
1da177e4 LT |
599 | |
600 | #ifdef CONFIG_QUOTA | |
bd4c625c LT |
601 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
602 | size_t, loff_t); | |
603 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, | |
604 | loff_t); | |
1da177e4 LT |
605 | #endif |
606 | ||
ee9b6d61 | 607 | static const struct super_operations reiserfs_sops = { |
bd4c625c LT |
608 | .alloc_inode = reiserfs_alloc_inode, |
609 | .destroy_inode = reiserfs_destroy_inode, | |
610 | .write_inode = reiserfs_write_inode, | |
611 | .dirty_inode = reiserfs_dirty_inode, | |
612 | .delete_inode = reiserfs_delete_inode, | |
613 | .clear_inode = reiserfs_clear_inode, | |
614 | .put_super = reiserfs_put_super, | |
615 | .write_super = reiserfs_write_super, | |
616 | .sync_fs = reiserfs_sync_fs, | |
617 | .write_super_lockfs = reiserfs_write_super_lockfs, | |
618 | .unlockfs = reiserfs_unlockfs, | |
619 | .statfs = reiserfs_statfs, | |
620 | .remount_fs = reiserfs_remount, | |
cdf6ccc8 | 621 | .show_options = generic_show_options, |
1da177e4 | 622 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
623 | .quota_read = reiserfs_quota_read, |
624 | .quota_write = reiserfs_quota_write, | |
1da177e4 LT |
625 | #endif |
626 | }; | |
627 | ||
628 | #ifdef CONFIG_QUOTA | |
629 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
630 | ||
631 | static int reiserfs_dquot_initialize(struct inode *, int); | |
632 | static int reiserfs_dquot_drop(struct inode *); | |
633 | static int reiserfs_write_dquot(struct dquot *); | |
634 | static int reiserfs_acquire_dquot(struct dquot *); | |
635 | static int reiserfs_release_dquot(struct dquot *); | |
636 | static int reiserfs_mark_dquot_dirty(struct dquot *); | |
637 | static int reiserfs_write_info(struct super_block *, int); | |
1b445a9c | 638 | static int reiserfs_quota_on(struct super_block *, int, int, char *, int); |
1da177e4 | 639 | |
bd4c625c LT |
640 | static struct dquot_operations reiserfs_quota_operations = { |
641 | .initialize = reiserfs_dquot_initialize, | |
642 | .drop = reiserfs_dquot_drop, | |
643 | .alloc_space = dquot_alloc_space, | |
644 | .alloc_inode = dquot_alloc_inode, | |
645 | .free_space = dquot_free_space, | |
646 | .free_inode = dquot_free_inode, | |
647 | .transfer = dquot_transfer, | |
648 | .write_dquot = reiserfs_write_dquot, | |
649 | .acquire_dquot = reiserfs_acquire_dquot, | |
650 | .release_dquot = reiserfs_release_dquot, | |
651 | .mark_dirty = reiserfs_mark_dquot_dirty, | |
652 | .write_info = reiserfs_write_info, | |
1da177e4 LT |
653 | }; |
654 | ||
bd4c625c LT |
655 | static struct quotactl_ops reiserfs_qctl_operations = { |
656 | .quota_on = reiserfs_quota_on, | |
657 | .quota_off = vfs_quota_off, | |
658 | .quota_sync = vfs_quota_sync, | |
659 | .get_info = vfs_get_dqinfo, | |
660 | .set_info = vfs_set_dqinfo, | |
661 | .get_dqblk = vfs_get_dqblk, | |
662 | .set_dqblk = vfs_set_dqblk, | |
1da177e4 LT |
663 | }; |
664 | #endif | |
665 | ||
39655164 | 666 | static const struct export_operations reiserfs_export_ops = { |
bd4c625c | 667 | .encode_fh = reiserfs_encode_fh, |
be55caf1 CH |
668 | .fh_to_dentry = reiserfs_fh_to_dentry, |
669 | .fh_to_parent = reiserfs_fh_to_parent, | |
bd4c625c | 670 | .get_parent = reiserfs_get_parent, |
bd4c625c | 671 | }; |
1da177e4 LT |
672 | |
673 | /* this struct is used in reiserfs_getopt () for containing the value for those | |
674 | mount options that have values rather than being toggles. */ | |
675 | typedef struct { | |
bd4c625c LT |
676 | char *value; |
677 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
678 | value is found, 0 is no bits are to be changed. */ | |
679 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
680 | value is found, 0 is no bits are to be changed. This is | |
681 | applied BEFORE setmask */ | |
1da177e4 LT |
682 | } arg_desc_t; |
683 | ||
684 | /* Set this bit in arg_required to allow empty arguments */ | |
685 | #define REISERFS_OPT_ALLOWEMPTY 31 | |
686 | ||
687 | /* this struct is used in reiserfs_getopt() for describing the set of reiserfs | |
688 | mount options */ | |
689 | typedef struct { | |
bd4c625c LT |
690 | char *option_name; |
691 | int arg_required; /* 0 if argument is not required, not 0 otherwise */ | |
692 | const arg_desc_t *values; /* list of values accepted by an option */ | |
693 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
694 | value is found, 0 is no bits are to be changed. */ | |
695 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
696 | value is found, 0 is no bits are to be changed. This is | |
697 | applied BEFORE setmask */ | |
1da177e4 LT |
698 | } opt_desc_t; |
699 | ||
700 | /* possible values for -o data= */ | |
701 | static const arg_desc_t logging_mode[] = { | |
bd4c625c LT |
702 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
703 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, | |
704 | {"journal", 1 << REISERFS_DATA_LOG, | |
705 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, | |
706 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, | |
707 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, | |
cd02b966 | 708 | {.value = NULL} |
1da177e4 LT |
709 | }; |
710 | ||
711 | /* possible values for -o barrier= */ | |
712 | static const arg_desc_t barrier_mode[] = { | |
bd4c625c LT |
713 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
714 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, | |
cd02b966 | 715 | {.value = NULL} |
1da177e4 LT |
716 | }; |
717 | ||
718 | /* possible values for "-o block-allocator=" and bits which are to be set in | |
719 | s_mount_opt of reiserfs specific part of in-core super block */ | |
720 | static const arg_desc_t balloc[] = { | |
bd4c625c LT |
721 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
722 | {"border", 0, 1 << REISERFS_NO_BORDER}, | |
723 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, | |
724 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, | |
725 | {"test4", 1 << REISERFS_TEST4, 0}, | |
726 | {"notest4", 0, 1 << REISERFS_TEST4}, | |
727 | {NULL, 0, 0} | |
1da177e4 LT |
728 | }; |
729 | ||
730 | static const arg_desc_t tails[] = { | |
bd4c625c LT |
731 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
732 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
733 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, | |
734 | {NULL, 0, 0} | |
1da177e4 LT |
735 | }; |
736 | ||
737 | static const arg_desc_t error_actions[] = { | |
bd4c625c LT |
738 | {"panic", 1 << REISERFS_ERROR_PANIC, |
739 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, | |
740 | {"ro-remount", 1 << REISERFS_ERROR_RO, | |
741 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, | |
1da177e4 | 742 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
bd4c625c LT |
743 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
744 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, | |
1da177e4 | 745 | #endif |
bd4c625c | 746 | {NULL, 0, 0}, |
1da177e4 LT |
747 | }; |
748 | ||
1da177e4 LT |
749 | /* proceed only one option from a list *cur - string containing of mount options |
750 | opts - array of options which are accepted | |
751 | opt_arg - if option is found and requires an argument and if it is specifed | |
752 | in the input - pointer to the argument is stored here | |
753 | bit_flags - if option requires to set a certain bit - it is set here | |
754 | return -1 if unknown option is found, opt->arg_required otherwise */ | |
bd4c625c LT |
755 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
756 | char **opt_arg, unsigned long *bit_flags) | |
1da177e4 | 757 | { |
bd4c625c LT |
758 | char *p; |
759 | /* foo=bar, | |
760 | ^ ^ ^ | |
761 | | | +-- option_end | |
762 | | +-- arg_start | |
763 | +-- option_start | |
764 | */ | |
765 | const opt_desc_t *opt; | |
766 | const arg_desc_t *arg; | |
767 | ||
768 | p = *cur; | |
769 | ||
770 | /* assume argument cannot contain commas */ | |
771 | *cur = strchr(p, ','); | |
772 | if (*cur) { | |
773 | *(*cur) = '\0'; | |
774 | (*cur)++; | |
775 | } | |
776 | ||
777 | if (!strncmp(p, "alloc=", 6)) { | |
778 | /* Ugly special case, probably we should redo options parser so that | |
779 | it can understand several arguments for some options, also so that | |
780 | it can fill several bitfields with option values. */ | |
781 | if (reiserfs_parse_alloc_options(s, p + 6)) { | |
782 | return -1; | |
783 | } else { | |
784 | return 0; | |
785 | } | |
786 | } | |
787 | ||
788 | /* for every option in the list */ | |
789 | for (opt = opts; opt->option_name; opt++) { | |
790 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { | |
791 | if (bit_flags) { | |
792 | if (opt->clrmask == | |
793 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
794 | reiserfs_warning(s, "%s not supported.", | |
795 | p); | |
796 | else | |
797 | *bit_flags &= ~opt->clrmask; | |
798 | if (opt->setmask == | |
799 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
800 | reiserfs_warning(s, "%s not supported.", | |
801 | p); | |
802 | else | |
803 | *bit_flags |= opt->setmask; | |
804 | } | |
805 | break; | |
806 | } | |
807 | } | |
808 | if (!opt->option_name) { | |
809 | reiserfs_warning(s, "unknown mount option \"%s\"", p); | |
810 | return -1; | |
811 | } | |
812 | ||
813 | p += strlen(opt->option_name); | |
814 | switch (*p) { | |
815 | case '=': | |
816 | if (!opt->arg_required) { | |
817 | reiserfs_warning(s, | |
818 | "the option \"%s\" does not require an argument", | |
819 | opt->option_name); | |
820 | return -1; | |
821 | } | |
822 | break; | |
823 | ||
824 | case 0: | |
825 | if (opt->arg_required) { | |
826 | reiserfs_warning(s, | |
827 | "the option \"%s\" requires an argument", | |
828 | opt->option_name); | |
829 | return -1; | |
830 | } | |
831 | break; | |
832 | default: | |
833 | reiserfs_warning(s, "head of option \"%s\" is only correct", | |
834 | opt->option_name); | |
835 | return -1; | |
836 | } | |
837 | ||
838 | /* move to the argument, or to next option if argument is not required */ | |
839 | p++; | |
840 | ||
841 | if (opt->arg_required | |
842 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) | |
843 | && !strlen(p)) { | |
844 | /* this catches "option=," if not allowed */ | |
845 | reiserfs_warning(s, "empty argument for \"%s\"", | |
846 | opt->option_name); | |
847 | return -1; | |
848 | } | |
849 | ||
850 | if (!opt->values) { | |
851 | /* *=NULLopt_arg contains pointer to argument */ | |
852 | *opt_arg = p; | |
853 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); | |
854 | } | |
855 | ||
856 | /* values possible for this option are listed in opt->values */ | |
857 | for (arg = opt->values; arg->value; arg++) { | |
858 | if (!strcmp(p, arg->value)) { | |
859 | if (bit_flags) { | |
860 | *bit_flags &= ~arg->clrmask; | |
861 | *bit_flags |= arg->setmask; | |
862 | } | |
863 | return opt->arg_required; | |
864 | } | |
865 | } | |
866 | ||
867 | reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p, | |
868 | opt->option_name); | |
1da177e4 | 869 | return -1; |
1da177e4 LT |
870 | } |
871 | ||
872 | /* returns 0 if something is wrong in option string, 1 - otherwise */ | |
bd4c625c LT |
873 | static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */ |
874 | unsigned long *mount_options, | |
875 | /* after the parsing phase, contains the | |
876 | collection of bitflags defining what | |
877 | mount options were selected. */ | |
878 | unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */ | |
879 | char **jdev_name, | |
00b44197 JK |
880 | unsigned int *commit_max_age, |
881 | char **qf_names, | |
882 | unsigned int *qfmt) | |
1da177e4 | 883 | { |
bd4c625c LT |
884 | int c; |
885 | char *arg = NULL; | |
886 | char *pos; | |
887 | opt_desc_t opts[] = { | |
888 | /* Compatibility stuff, so that -o notail for old setups still work */ | |
889 | {"tails",.arg_required = 't',.values = tails}, | |
890 | {"notail",.clrmask = | |
891 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
892 | {"conv",.setmask = 1 << REISERFS_CONVERT}, | |
893 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, | |
894 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, | |
1da177e4 | 895 | #ifdef CONFIG_REISERFS_FS_XATTR |
bd4c625c LT |
896 | {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
897 | {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, | |
1da177e4 | 898 | #else |
bd4c625c LT |
899 | {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
900 | {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 LT |
901 | #endif |
902 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
bd4c625c LT |
903 | {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
904 | {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, | |
1da177e4 | 905 | #else |
bd4c625c LT |
906 | {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
907 | {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 | 908 | #endif |
cd02b966 | 909 | {.option_name = "nolog"}, |
bd4c625c LT |
910 | {"replayonly",.setmask = 1 << REPLAYONLY}, |
911 | {"block-allocator",.arg_required = 'a',.values = balloc}, | |
912 | {"data",.arg_required = 'd',.values = logging_mode}, | |
913 | {"barrier",.arg_required = 'b',.values = barrier_mode}, | |
914 | {"resize",.arg_required = 'r',.values = NULL}, | |
915 | {"jdev",.arg_required = 'j',.values = NULL}, | |
916 | {"nolargeio",.arg_required = 'w',.values = NULL}, | |
917 | {"commit",.arg_required = 'c',.values = NULL}, | |
918 | {"usrquota",.setmask = 1 << REISERFS_QUOTA}, | |
919 | {"grpquota",.setmask = 1 << REISERFS_QUOTA}, | |
920 | {"noquota",.clrmask = 1 << REISERFS_QUOTA}, | |
921 | {"errors",.arg_required = 'e',.values = error_actions}, | |
922 | {"usrjquota",.arg_required = | |
923 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
924 | {"grpjquota",.arg_required = | |
925 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
926 | {"jqfmt",.arg_required = 'f',.values = NULL}, | |
cd02b966 | 927 | {.option_name = NULL} |
bd4c625c LT |
928 | }; |
929 | ||
930 | *blocks = 0; | |
931 | if (!options || !*options) | |
932 | /* use default configuration: create tails, journaling on, no | |
933 | conversion to newest format */ | |
934 | return 1; | |
935 | ||
936 | for (pos = options; pos;) { | |
937 | c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); | |
938 | if (c == -1) | |
939 | /* wrong option is given */ | |
9a3bb301 | 940 | return 0; |
1da177e4 | 941 | |
bd4c625c LT |
942 | if (c == 'r') { |
943 | char *p; | |
944 | ||
945 | p = NULL; | |
946 | /* "resize=NNN" or "resize=auto" */ | |
947 | ||
948 | if (!strcmp(arg, "auto")) { | |
949 | /* From JFS code, to auto-get the size. */ | |
950 | *blocks = | |
951 | s->s_bdev->bd_inode->i_size >> s-> | |
952 | s_blocksize_bits; | |
953 | } else { | |
954 | *blocks = simple_strtoul(arg, &p, 0); | |
955 | if (*p != '\0') { | |
956 | /* NNN does not look like a number */ | |
957 | reiserfs_warning(s, | |
958 | "reiserfs_parse_options: bad value %s", | |
959 | arg); | |
960 | return 0; | |
961 | } | |
962 | } | |
1da177e4 | 963 | } |
1da177e4 | 964 | |
bd4c625c LT |
965 | if (c == 'c') { |
966 | char *p = NULL; | |
967 | unsigned long val = simple_strtoul(arg, &p, 0); | |
968 | /* commit=NNN (time in seconds) */ | |
969 | if (*p != '\0' || val >= (unsigned int)-1) { | |
970 | reiserfs_warning(s, | |
971 | "reiserfs_parse_options: bad value %s", | |
972 | arg); | |
973 | return 0; | |
974 | } | |
975 | *commit_max_age = (unsigned int)val; | |
1da177e4 | 976 | } |
1da177e4 | 977 | |
bd4c625c | 978 | if (c == 'w') { |
36b756f2 AB |
979 | reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported"); |
980 | return 0; | |
1da177e4 | 981 | } |
1da177e4 | 982 | |
bd4c625c LT |
983 | if (c == 'j') { |
984 | if (arg && *arg && jdev_name) { | |
985 | if (*jdev_name) { //Hm, already assigned? | |
986 | reiserfs_warning(s, | |
987 | "reiserfs_parse_options: journal device was already specified to be %s", | |
988 | *jdev_name); | |
989 | return 0; | |
990 | } | |
991 | *jdev_name = arg; | |
992 | } | |
1da177e4 | 993 | } |
bd4c625c LT |
994 | #ifdef CONFIG_QUOTA |
995 | if (c == 'u' || c == 'g') { | |
996 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; | |
997 | ||
00b44197 JK |
998 | if ((sb_any_quota_enabled(s) || |
999 | sb_any_quota_suspended(s)) && | |
1000 | (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { | |
bd4c625c | 1001 | reiserfs_warning(s, |
4506567b | 1002 | "reiserfs_parse_options: cannot change journaled quota options when quota turned on."); |
bd4c625c LT |
1003 | return 0; |
1004 | } | |
1005 | if (*arg) { /* Some filename specified? */ | |
1006 | if (REISERFS_SB(s)->s_qf_names[qtype] | |
1007 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], | |
1008 | arg)) { | |
1009 | reiserfs_warning(s, | |
1010 | "reiserfs_parse_options: %s quota file already specified.", | |
1011 | QTYPE2NAME(qtype)); | |
1012 | return 0; | |
1013 | } | |
1014 | if (strchr(arg, '/')) { | |
1015 | reiserfs_warning(s, | |
1016 | "reiserfs_parse_options: quotafile must be on filesystem root."); | |
1017 | return 0; | |
1018 | } | |
00b44197 | 1019 | qf_names[qtype] = |
bd4c625c | 1020 | kmalloc(strlen(arg) + 1, GFP_KERNEL); |
00b44197 | 1021 | if (!qf_names[qtype]) { |
bd4c625c LT |
1022 | reiserfs_warning(s, |
1023 | "reiserfs_parse_options: not enough memory for storing quotafile name."); | |
1024 | return 0; | |
1025 | } | |
00b44197 | 1026 | strcpy(qf_names[qtype], arg); |
bd4c625c LT |
1027 | *mount_options |= 1 << REISERFS_QUOTA; |
1028 | } else { | |
00b44197 JK |
1029 | if (qf_names[qtype] != |
1030 | REISERFS_SB(s)->s_qf_names[qtype]) | |
1031 | kfree(qf_names[qtype]); | |
1032 | qf_names[qtype] = NULL; | |
bd4c625c | 1033 | } |
1da177e4 | 1034 | } |
bd4c625c LT |
1035 | if (c == 'f') { |
1036 | if (!strcmp(arg, "vfsold")) | |
00b44197 | 1037 | *qfmt = QFMT_VFS_OLD; |
bd4c625c | 1038 | else if (!strcmp(arg, "vfsv0")) |
00b44197 | 1039 | *qfmt = QFMT_VFS_V0; |
bd4c625c LT |
1040 | else { |
1041 | reiserfs_warning(s, | |
1042 | "reiserfs_parse_options: unknown quota format specified."); | |
1043 | return 0; | |
1044 | } | |
00b44197 JK |
1045 | if ((sb_any_quota_enabled(s) || |
1046 | sb_any_quota_suspended(s)) && | |
1047 | *qfmt != REISERFS_SB(s)->s_jquota_fmt) { | |
1048 | reiserfs_warning(s, | |
1049 | "reiserfs_parse_options: cannot change journaled quota options when quota turned on."); | |
1050 | return 0; | |
1051 | } | |
1da177e4 | 1052 | } |
bd4c625c LT |
1053 | #else |
1054 | if (c == 'u' || c == 'g' || c == 'f') { | |
1055 | reiserfs_warning(s, | |
4506567b | 1056 | "reiserfs_parse_options: journaled quota options not supported."); |
bd4c625c | 1057 | return 0; |
1da177e4 | 1058 | } |
bd4c625c LT |
1059 | #endif |
1060 | } | |
1061 | ||
1062 | #ifdef CONFIG_QUOTA | |
00b44197 JK |
1063 | if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
1064 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { | |
bd4c625c | 1065 | reiserfs_warning(s, |
4506567b | 1066 | "reiserfs_parse_options: journaled quota format not specified."); |
1da177e4 | 1067 | return 0; |
1da177e4 | 1068 | } |
bd4c625c LT |
1069 | /* This checking is not precise wrt the quota type but for our purposes it is sufficient */ |
1070 | if (!(*mount_options & (1 << REISERFS_QUOTA)) | |
1071 | && sb_any_quota_enabled(s)) { | |
1072 | reiserfs_warning(s, | |
1073 | "reiserfs_parse_options: quota options must be present when quota is turned on."); | |
1074 | return 0; | |
1da177e4 LT |
1075 | } |
1076 | #endif | |
556a2a45 | 1077 | |
bd4c625c | 1078 | return 1; |
1da177e4 LT |
1079 | } |
1080 | ||
bd4c625c LT |
1081 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1082 | { | |
1083 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | | |
1084 | (1 << REISERFS_DATA_ORDERED) | | |
1085 | (1 << REISERFS_DATA_WRITEBACK)); | |
1086 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); | |
1da177e4 LT |
1087 | } |
1088 | ||
1089 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) | |
1090 | { | |
bd4c625c LT |
1091 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1092 | if (!reiserfs_data_log(s)) { | |
1093 | switch_data_mode(s, REISERFS_DATA_LOG); | |
1094 | reiserfs_info(s, "switching to journaled data mode\n"); | |
1095 | } | |
1096 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { | |
1097 | if (!reiserfs_data_ordered(s)) { | |
1098 | switch_data_mode(s, REISERFS_DATA_ORDERED); | |
1099 | reiserfs_info(s, "switching to ordered data mode\n"); | |
1100 | } | |
1101 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { | |
1102 | if (!reiserfs_data_writeback(s)) { | |
1103 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); | |
1104 | reiserfs_info(s, "switching to writeback data mode\n"); | |
1105 | } | |
1106 | } | |
1da177e4 LT |
1107 | } |
1108 | ||
bd4c625c LT |
1109 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1110 | { | |
1111 | int flush = (1 << REISERFS_BARRIER_FLUSH); | |
1112 | int none = (1 << REISERFS_BARRIER_NONE); | |
1113 | int all_barrier = flush | none; | |
1114 | ||
1115 | if (bits & all_barrier) { | |
1116 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; | |
1117 | if (bits & flush) { | |
1118 | REISERFS_SB(s)->s_mount_opt |= flush; | |
1119 | printk("reiserfs: enabling write barrier flush mode\n"); | |
1120 | } else if (bits & none) { | |
1121 | REISERFS_SB(s)->s_mount_opt |= none; | |
1122 | printk("reiserfs: write barriers turned off\n"); | |
1123 | } | |
1124 | } | |
1da177e4 LT |
1125 | } |
1126 | ||
bd4c625c | 1127 | static void handle_attrs(struct super_block *s) |
1da177e4 | 1128 | { |
bd4c625c | 1129 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1130 | |
bd4c625c LT |
1131 | if (reiserfs_attrs(s)) { |
1132 | if (old_format_only(s)) { | |
1133 | reiserfs_warning(s, | |
1134 | "reiserfs: cannot support attributes on 3.5.x disk format"); | |
1135 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); | |
1da177e4 LT |
1136 | return; |
1137 | } | |
bd4c625c LT |
1138 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
1139 | reiserfs_warning(s, | |
1140 | "reiserfs: cannot support attributes until flag is set in super-block"); | |
1141 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); | |
1da177e4 LT |
1142 | } |
1143 | } | |
1144 | } | |
1145 | ||
00b44197 JK |
1146 | #ifdef CONFIG_QUOTA |
1147 | static void handle_quota_files(struct super_block *s, char **qf_names, | |
1148 | unsigned int *qfmt) | |
1149 | { | |
1150 | int i; | |
1151 | ||
1152 | for (i = 0; i < MAXQUOTAS; i++) { | |
1153 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1154 | kfree(REISERFS_SB(s)->s_qf_names[i]); | |
1155 | REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; | |
1156 | } | |
1157 | REISERFS_SB(s)->s_jquota_fmt = *qfmt; | |
1158 | } | |
1159 | #endif | |
1160 | ||
bd4c625c | 1161 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1da177e4 | 1162 | { |
bd4c625c LT |
1163 | struct reiserfs_super_block *rs; |
1164 | struct reiserfs_transaction_handle th; | |
1165 | unsigned long blocks; | |
1166 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; | |
1167 | unsigned long safe_mask = 0; | |
1168 | unsigned int commit_max_age = (unsigned int)-1; | |
1169 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
cdf6ccc8 | 1170 | char *new_opts = kstrdup(arg, GFP_KERNEL); |
bd4c625c | 1171 | int err; |
00b44197 JK |
1172 | char *qf_names[MAXQUOTAS]; |
1173 | unsigned int qfmt = 0; | |
1da177e4 | 1174 | #ifdef CONFIG_QUOTA |
bd4c625c | 1175 | int i; |
00b44197 JK |
1176 | |
1177 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); | |
1da177e4 LT |
1178 | #endif |
1179 | ||
bd4c625c | 1180 | rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1181 | |
bd4c625c | 1182 | if (!reiserfs_parse_options |
00b44197 JK |
1183 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
1184 | qf_names, &qfmt)) { | |
1da177e4 | 1185 | #ifdef CONFIG_QUOTA |
00b44197 JK |
1186 | for (i = 0; i < MAXQUOTAS; i++) |
1187 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1188 | kfree(qf_names[i]); | |
1da177e4 | 1189 | #endif |
cdf6ccc8 MS |
1190 | err = -EINVAL; |
1191 | goto out_err; | |
bd4c625c | 1192 | } |
00b44197 JK |
1193 | #ifdef CONFIG_QUOTA |
1194 | handle_quota_files(s, qf_names, &qfmt); | |
1195 | #endif | |
bd4c625c LT |
1196 | |
1197 | handle_attrs(s); | |
1198 | ||
1199 | /* Add options that are safe here */ | |
1200 | safe_mask |= 1 << REISERFS_SMALLTAIL; | |
1201 | safe_mask |= 1 << REISERFS_LARGETAIL; | |
1202 | safe_mask |= 1 << REISERFS_NO_BORDER; | |
1203 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; | |
1204 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; | |
1205 | safe_mask |= 1 << REISERFS_TEST4; | |
1206 | safe_mask |= 1 << REISERFS_ATTRS; | |
1207 | safe_mask |= 1 << REISERFS_XATTRS_USER; | |
1208 | safe_mask |= 1 << REISERFS_POSIXACL; | |
1209 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; | |
1210 | safe_mask |= 1 << REISERFS_BARRIER_NONE; | |
1211 | safe_mask |= 1 << REISERFS_ERROR_RO; | |
1212 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; | |
1213 | safe_mask |= 1 << REISERFS_ERROR_PANIC; | |
1214 | safe_mask |= 1 << REISERFS_QUOTA; | |
1215 | ||
1216 | /* Update the bitmask, taking care to keep | |
1217 | * the bits we're not allowed to change here */ | |
1218 | REISERFS_SB(s)->s_mount_opt = | |
1219 | (REISERFS_SB(s)-> | |
1220 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); | |
1221 | ||
1222 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { | |
1223 | journal->j_max_commit_age = commit_max_age; | |
1224 | journal->j_max_trans_age = commit_max_age; | |
1225 | } else if (commit_max_age == 0) { | |
1226 | /* 0 means restore defaults. */ | |
1227 | journal->j_max_commit_age = journal->j_default_max_commit_age; | |
1228 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
1229 | } | |
1230 | ||
1231 | if (blocks) { | |
cdf6ccc8 MS |
1232 | err = reiserfs_resize(s, blocks); |
1233 | if (err != 0) | |
1234 | goto out_err; | |
bd4c625c LT |
1235 | } |
1236 | ||
1237 | if (*mount_flags & MS_RDONLY) { | |
1238 | reiserfs_xattr_init(s, *mount_flags); | |
1239 | /* remount read-only */ | |
1240 | if (s->s_flags & MS_RDONLY) | |
1241 | /* it is read-only already */ | |
cdf6ccc8 | 1242 | goto out_ok; |
bd4c625c LT |
1243 | /* try to remount file system with read-only permissions */ |
1244 | if (sb_umount_state(rs) == REISERFS_VALID_FS | |
1245 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { | |
cdf6ccc8 | 1246 | goto out_ok; |
bd4c625c LT |
1247 | } |
1248 | ||
1249 | err = journal_begin(&th, s, 10); | |
1250 | if (err) | |
cdf6ccc8 | 1251 | goto out_err; |
bd4c625c LT |
1252 | |
1253 | /* Mounting a rw partition read-only. */ | |
1254 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1255 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); | |
1256 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1257 | } else { | |
1258 | /* remount read-write */ | |
1259 | if (!(s->s_flags & MS_RDONLY)) { | |
1260 | reiserfs_xattr_init(s, *mount_flags); | |
cdf6ccc8 | 1261 | goto out_ok; /* We are read-write already */ |
bd4c625c LT |
1262 | } |
1263 | ||
cdf6ccc8 MS |
1264 | if (reiserfs_is_journal_aborted(journal)) { |
1265 | err = journal->j_errno; | |
1266 | goto out_err; | |
1267 | } | |
bd4c625c LT |
1268 | |
1269 | handle_data_mode(s, mount_options); | |
1270 | handle_barrier_mode(s, mount_options); | |
1271 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1272 | s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ | |
1273 | err = journal_begin(&th, s, 10); | |
1274 | if (err) | |
cdf6ccc8 | 1275 | goto out_err; |
bd4c625c LT |
1276 | |
1277 | /* Mount a partition which is read-only, read-write */ | |
1278 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1279 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1280 | s->s_flags &= ~MS_RDONLY; | |
1281 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
1282 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ | |
1283 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1284 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; | |
1285 | } | |
1286 | /* this will force a full flush of all journal lists */ | |
1287 | SB_JOURNAL(s)->j_must_wait = 1; | |
1288 | err = journal_end(&th, s, 10); | |
1289 | if (err) | |
cdf6ccc8 | 1290 | goto out_err; |
bd4c625c LT |
1291 | s->s_dirt = 0; |
1292 | ||
1293 | if (!(*mount_flags & MS_RDONLY)) { | |
1294 | finish_unfinished(s); | |
1295 | reiserfs_xattr_init(s, *mount_flags); | |
1296 | } | |
1297 | ||
cdf6ccc8 MS |
1298 | out_ok: |
1299 | kfree(s->s_options); | |
1300 | s->s_options = new_opts; | |
bd4c625c | 1301 | return 0; |
cdf6ccc8 MS |
1302 | |
1303 | out_err: | |
1304 | kfree(new_opts); | |
1305 | return err; | |
1da177e4 LT |
1306 | } |
1307 | ||
bd4c625c | 1308 | static int read_super_block(struct super_block *s, int offset) |
1da177e4 | 1309 | { |
bd4c625c LT |
1310 | struct buffer_head *bh; |
1311 | struct reiserfs_super_block *rs; | |
1312 | int fs_blocksize; | |
1da177e4 | 1313 | |
bd4c625c LT |
1314 | bh = sb_bread(s, offset / s->s_blocksize); |
1315 | if (!bh) { | |
1316 | reiserfs_warning(s, "sh-2006: read_super_block: " | |
1317 | "bread failed (dev %s, block %lu, size %lu)", | |
1318 | reiserfs_bdevname(s), offset / s->s_blocksize, | |
1319 | s->s_blocksize); | |
1320 | return 1; | |
1321 | } | |
1da177e4 | 1322 | |
bd4c625c LT |
1323 | rs = (struct reiserfs_super_block *)bh->b_data; |
1324 | if (!is_any_reiserfs_magic_string(rs)) { | |
1325 | brelse(bh); | |
1326 | return 1; | |
1327 | } | |
1328 | // | |
1329 | // ok, reiserfs signature (old or new) found in at the given offset | |
1330 | // | |
1331 | fs_blocksize = sb_blocksize(rs); | |
1332 | brelse(bh); | |
1333 | sb_set_blocksize(s, fs_blocksize); | |
1da177e4 | 1334 | |
bd4c625c LT |
1335 | bh = sb_bread(s, offset / s->s_blocksize); |
1336 | if (!bh) { | |
1337 | reiserfs_warning(s, "sh-2007: read_super_block: " | |
1338 | "bread failed (dev %s, block %lu, size %lu)\n", | |
1339 | reiserfs_bdevname(s), offset / s->s_blocksize, | |
1340 | s->s_blocksize); | |
1341 | return 1; | |
1342 | } | |
1da177e4 | 1343 | |
bd4c625c LT |
1344 | rs = (struct reiserfs_super_block *)bh->b_data; |
1345 | if (sb_blocksize(rs) != s->s_blocksize) { | |
1346 | reiserfs_warning(s, "sh-2011: read_super_block: " | |
1347 | "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n", | |
1348 | reiserfs_bdevname(s), | |
1349 | (unsigned long long)bh->b_blocknr, | |
1350 | s->s_blocksize); | |
1351 | brelse(bh); | |
1352 | return 1; | |
1353 | } | |
1da177e4 | 1354 | |
bd4c625c LT |
1355 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
1356 | brelse(bh); | |
1357 | reiserfs_warning(s, | |
1358 | "Unfinished reiserfsck --rebuild-tree run detected. Please run\n" | |
1359 | "reiserfsck --rebuild-tree and wait for a completion. If that fails\n" | |
1360 | "get newer reiserfsprogs package"); | |
1361 | return 1; | |
1da177e4 | 1362 | } |
1da177e4 | 1363 | |
bd4c625c LT |
1364 | SB_BUFFER_WITH_SB(s) = bh; |
1365 | SB_DISK_SUPER_BLOCK(s) = rs; | |
1366 | ||
1367 | if (is_reiserfs_jr(rs)) { | |
1368 | /* magic is of non-standard journal filesystem, look at s_version to | |
1369 | find which format is in use */ | |
1370 | if (sb_version(rs) == REISERFS_VERSION_2) | |
1371 | reiserfs_warning(s, | |
1372 | "read_super_block: found reiserfs format \"3.6\"" | |
1373 | " with non-standard journal"); | |
1374 | else if (sb_version(rs) == REISERFS_VERSION_1) | |
1375 | reiserfs_warning(s, | |
1376 | "read_super_block: found reiserfs format \"3.5\"" | |
1377 | " with non-standard journal"); | |
1378 | else { | |
1379 | reiserfs_warning(s, | |
1380 | "sh-2012: read_super_block: found unknown " | |
1381 | "format \"%u\" of reiserfs with non-standard magic", | |
1382 | sb_version(rs)); | |
1383 | return 1; | |
1384 | } | |
1385 | } else | |
1386 | /* s_version of standard format may contain incorrect information, | |
1387 | so we just look at the magic string */ | |
1388 | reiserfs_info(s, | |
1389 | "found reiserfs format \"%s\" with standard journal\n", | |
1390 | is_reiserfs_3_5(rs) ? "3.5" : "3.6"); | |
1391 | ||
1392 | s->s_op = &reiserfs_sops; | |
1393 | s->s_export_op = &reiserfs_export_ops; | |
1da177e4 | 1394 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
1395 | s->s_qcop = &reiserfs_qctl_operations; |
1396 | s->dq_op = &reiserfs_quota_operations; | |
1da177e4 LT |
1397 | #endif |
1398 | ||
bd4c625c LT |
1399 | /* new format is limited by the 32 bit wide i_blocks field, want to |
1400 | ** be one full block below that. | |
1401 | */ | |
1402 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; | |
1403 | return 0; | |
1da177e4 LT |
1404 | } |
1405 | ||
1da177e4 | 1406 | /* after journal replay, reread all bitmap and super blocks */ |
bd4c625c LT |
1407 | static int reread_meta_blocks(struct super_block *s) |
1408 | { | |
bd4c625c LT |
1409 | ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))); |
1410 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); | |
1411 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { | |
1412 | reiserfs_warning(s, | |
1413 | "reread_meta_blocks, error reading the super"); | |
1414 | return 1; | |
1415 | } | |
1da177e4 | 1416 | |
bd4c625c | 1417 | return 0; |
bd4c625c | 1418 | } |
1da177e4 LT |
1419 | |
1420 | ///////////////////////////////////////////////////// | |
1421 | // hash detection stuff | |
1422 | ||
1da177e4 LT |
1423 | // if root directory is empty - we set default - Yura's - hash and |
1424 | // warn about it | |
1425 | // FIXME: we look for only one name in a directory. If tea and yura | |
1426 | // bith have the same value - we ask user to send report to the | |
1427 | // mailing list | |
bd4c625c | 1428 | static __u32 find_hash_out(struct super_block *s) |
1da177e4 | 1429 | { |
bd4c625c LT |
1430 | int retval; |
1431 | struct inode *inode; | |
1432 | struct cpu_key key; | |
1433 | INITIALIZE_PATH(path); | |
1434 | struct reiserfs_dir_entry de; | |
1435 | __u32 hash = DEFAULT_HASH; | |
1436 | ||
1437 | inode = s->s_root->d_inode; | |
1438 | ||
1439 | do { // Some serious "goto"-hater was there ;) | |
1440 | u32 teahash, r5hash, yurahash; | |
1441 | ||
1442 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); | |
1443 | retval = search_by_entry_key(s, &key, &path, &de); | |
1444 | if (retval == IO_ERROR) { | |
1445 | pathrelse(&path); | |
1446 | return UNSET_HASH; | |
1447 | } | |
1448 | if (retval == NAME_NOT_FOUND) | |
1449 | de.de_entry_num--; | |
1450 | set_de_name_and_namelen(&de); | |
1451 | if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) { | |
1452 | /* allow override in this case */ | |
1453 | if (reiserfs_rupasov_hash(s)) { | |
1454 | hash = YURA_HASH; | |
1455 | } | |
1456 | reiserfs_warning(s, "FS seems to be empty, autodetect " | |
1457 | "is using the default hash"); | |
1458 | break; | |
1459 | } | |
1460 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); | |
1461 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); | |
1462 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); | |
1463 | if (((teahash == r5hash) | |
1464 | && | |
1465 | (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) | |
1466 | == r5hash)) || ((teahash == yurahash) | |
1467 | && (yurahash == | |
1468 | GET_HASH_VALUE(deh_offset | |
1469 | (& | |
1470 | (de. | |
1471 | de_deh[de. | |
1472 | de_entry_num]))))) | |
1473 | || ((r5hash == yurahash) | |
1474 | && (yurahash == | |
1475 | GET_HASH_VALUE(deh_offset | |
1476 | (&(de.de_deh[de.de_entry_num])))))) { | |
1477 | reiserfs_warning(s, | |
1478 | "Unable to automatically detect hash function. " | |
1479 | "Please mount with -o hash={tea,rupasov,r5}", | |
1480 | reiserfs_bdevname(s)); | |
1481 | hash = UNSET_HASH; | |
1482 | break; | |
1483 | } | |
1484 | if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) == | |
1485 | yurahash) | |
1486 | hash = YURA_HASH; | |
1487 | else if (GET_HASH_VALUE | |
1488 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) | |
1489 | hash = TEA_HASH; | |
1490 | else if (GET_HASH_VALUE | |
1491 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) | |
1492 | hash = R5_HASH; | |
1493 | else { | |
1494 | reiserfs_warning(s, "Unrecognised hash function"); | |
1495 | hash = UNSET_HASH; | |
1496 | } | |
1497 | } while (0); | |
1498 | ||
1499 | pathrelse(&path); | |
1500 | return hash; | |
1da177e4 LT |
1501 | } |
1502 | ||
1503 | // finds out which hash names are sorted with | |
bd4c625c | 1504 | static int what_hash(struct super_block *s) |
1da177e4 | 1505 | { |
bd4c625c LT |
1506 | __u32 code; |
1507 | ||
1508 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); | |
1509 | ||
1510 | /* reiserfs_hash_detect() == true if any of the hash mount options | |
1511 | ** were used. We must check them to make sure the user isn't | |
1512 | ** using a bad hash value | |
1513 | */ | |
1514 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) | |
1515 | code = find_hash_out(s); | |
1516 | ||
1517 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { | |
1518 | /* detection has found the hash, and we must check against the | |
1519 | ** mount options | |
1520 | */ | |
1521 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { | |
1522 | reiserfs_warning(s, "Error, %s hash detected, " | |
1523 | "unable to force rupasov hash", | |
1524 | reiserfs_hashname(code)); | |
1525 | code = UNSET_HASH; | |
1526 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { | |
1527 | reiserfs_warning(s, "Error, %s hash detected, " | |
1528 | "unable to force tea hash", | |
1529 | reiserfs_hashname(code)); | |
1530 | code = UNSET_HASH; | |
1531 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { | |
1532 | reiserfs_warning(s, "Error, %s hash detected, " | |
1533 | "unable to force r5 hash", | |
1534 | reiserfs_hashname(code)); | |
1535 | code = UNSET_HASH; | |
1536 | } | |
1537 | } else { | |
1538 | /* find_hash_out was not called or could not determine the hash */ | |
1539 | if (reiserfs_rupasov_hash(s)) { | |
1540 | code = YURA_HASH; | |
1541 | } else if (reiserfs_tea_hash(s)) { | |
1542 | code = TEA_HASH; | |
1543 | } else if (reiserfs_r5_hash(s)) { | |
1544 | code = R5_HASH; | |
1545 | } | |
1546 | } | |
1547 | ||
1548 | /* if we are mounted RW, and we have a new valid hash code, update | |
1549 | ** the super | |
1550 | */ | |
1551 | if (code != UNSET_HASH && | |
1552 | !(s->s_flags & MS_RDONLY) && | |
1553 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { | |
1554 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); | |
1555 | } | |
1556 | return code; | |
1da177e4 LT |
1557 | } |
1558 | ||
1559 | // return pointer to appropriate function | |
bd4c625c | 1560 | static hashf_t hash_function(struct super_block *s) |
1da177e4 | 1561 | { |
bd4c625c LT |
1562 | switch (what_hash(s)) { |
1563 | case TEA_HASH: | |
1564 | reiserfs_info(s, "Using tea hash to sort names\n"); | |
1565 | return keyed_hash; | |
1566 | case YURA_HASH: | |
1567 | reiserfs_info(s, "Using rupasov hash to sort names\n"); | |
1568 | return yura_hash; | |
1569 | case R5_HASH: | |
1570 | reiserfs_info(s, "Using r5 hash to sort names\n"); | |
1571 | return r5_hash; | |
1572 | } | |
1573 | return NULL; | |
1da177e4 LT |
1574 | } |
1575 | ||
1576 | // this is used to set up correct value for old partitions | |
bd4c625c | 1577 | static int function2code(hashf_t func) |
1da177e4 | 1578 | { |
bd4c625c LT |
1579 | if (func == keyed_hash) |
1580 | return TEA_HASH; | |
1581 | if (func == yura_hash) | |
1582 | return YURA_HASH; | |
1583 | if (func == r5_hash) | |
1584 | return R5_HASH; | |
1da177e4 | 1585 | |
bd4c625c | 1586 | BUG(); // should never happen |
1da177e4 | 1587 | |
bd4c625c | 1588 | return 0; |
1da177e4 LT |
1589 | } |
1590 | ||
1591 | #define SWARN(silent, s, ...) \ | |
1592 | if (!(silent)) \ | |
1593 | reiserfs_warning (s, __VA_ARGS__) | |
1594 | ||
bd4c625c | 1595 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1da177e4 | 1596 | { |
bd4c625c | 1597 | struct inode *root_inode; |
bd4c625c LT |
1598 | struct reiserfs_transaction_handle th; |
1599 | int old_format = 0; | |
1600 | unsigned long blocks; | |
1601 | unsigned int commit_max_age = 0; | |
1602 | int jinit_done = 0; | |
1603 | struct reiserfs_iget_args args; | |
1604 | struct reiserfs_super_block *rs; | |
1605 | char *jdev_name; | |
1606 | struct reiserfs_sb_info *sbi; | |
1607 | int errval = -EINVAL; | |
00b44197 JK |
1608 | char *qf_names[MAXQUOTAS] = {}; |
1609 | unsigned int qfmt = 0; | |
bd4c625c | 1610 | |
cdf6ccc8 MS |
1611 | save_mount_options(s, data); |
1612 | ||
01afb213 | 1613 | sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
bd4c625c LT |
1614 | if (!sbi) { |
1615 | errval = -ENOMEM; | |
1616 | goto error; | |
1617 | } | |
1618 | s->s_fs_info = sbi; | |
bd4c625c LT |
1619 | /* Set default values for options: non-aggressive tails, RO on errors */ |
1620 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); | |
1621 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); | |
1622 | /* no preallocation minimum, be smart in | |
1623 | reiserfs_file_write instead */ | |
1624 | REISERFS_SB(s)->s_alloc_options.preallocmin = 0; | |
1625 | /* Preallocate by 16 blocks (17-1) at once */ | |
1626 | REISERFS_SB(s)->s_alloc_options.preallocsize = 17; | |
fe08a9d4 | 1627 | #ifdef CONFIG_REISERFS_FS_XATTR |
bd4c625c LT |
1628 | /* Initialize the rwsem for xattr dir */ |
1629 | init_rwsem(&REISERFS_SB(s)->xattr_dir_sem); | |
fe08a9d4 | 1630 | #endif |
bd4c625c LT |
1631 | /* setup default block allocator options */ |
1632 | reiserfs_init_alloc_options(s); | |
1633 | ||
1634 | jdev_name = NULL; | |
1635 | if (reiserfs_parse_options | |
1636 | (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name, | |
00b44197 | 1637 | &commit_max_age, qf_names, &qfmt) == 0) { |
bd4c625c LT |
1638 | goto error; |
1639 | } | |
00b44197 JK |
1640 | #ifdef CONFIG_QUOTA |
1641 | handle_quota_files(s, qf_names, &qfmt); | |
1642 | #endif | |
bd4c625c LT |
1643 | |
1644 | if (blocks) { | |
1645 | SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option " | |
1646 | "for remount only"); | |
1647 | goto error; | |
1648 | } | |
1649 | ||
1650 | /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ | |
1651 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) | |
1652 | old_format = 1; | |
1653 | /* try new format (64-th 1k block), which can contain reiserfs super block */ | |
1654 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { | |
1655 | SWARN(silent, s, | |
1656 | "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", | |
1657 | reiserfs_bdevname(s)); | |
1658 | goto error; | |
1659 | } | |
1660 | ||
1661 | rs = SB_DISK_SUPER_BLOCK(s); | |
1662 | /* Let's do basic sanity check to verify that underlying device is not | |
1663 | smaller than the filesystem. If the check fails then abort and scream, | |
1664 | because bad stuff will happen otherwise. */ | |
1665 | if (s->s_bdev && s->s_bdev->bd_inode | |
1666 | && i_size_read(s->s_bdev->bd_inode) < | |
1667 | sb_block_count(rs) * sb_blocksize(rs)) { | |
1668 | SWARN(silent, s, | |
1669 | "Filesystem on %s cannot be mounted because it is bigger than the device", | |
1670 | reiserfs_bdevname(s)); | |
1671 | SWARN(silent, s, | |
1672 | "You may need to run fsck or increase size of your LVM partition"); | |
1673 | SWARN(silent, s, | |
1674 | "Or may be you forgot to reboot after fdisk when it told you to"); | |
1675 | goto error; | |
1676 | } | |
1677 | ||
1678 | sbi->s_mount_state = SB_REISERFS_STATE(s); | |
1679 | sbi->s_mount_state = REISERFS_VALID_FS; | |
1680 | ||
6f01046b | 1681 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
bd4c625c LT |
1682 | SWARN(silent, s, |
1683 | "jmacd-8: reiserfs_fill_super: unable to read bitmap"); | |
1684 | goto error; | |
1685 | } | |
d2c89a42 | 1686 | errval = -EINVAL; |
1da177e4 | 1687 | #ifdef CONFIG_REISERFS_CHECK |
bd4c625c LT |
1688 | SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON"); |
1689 | SWARN(silent, s, "- it is slow mode for debugging."); | |
1da177e4 LT |
1690 | #endif |
1691 | ||
bd4c625c LT |
1692 | /* make data=ordered the default */ |
1693 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && | |
1694 | !reiserfs_data_writeback(s)) { | |
1695 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); | |
1696 | } | |
1697 | ||
1698 | if (reiserfs_data_log(s)) { | |
1699 | reiserfs_info(s, "using journaled data mode\n"); | |
1700 | } else if (reiserfs_data_ordered(s)) { | |
1701 | reiserfs_info(s, "using ordered data mode\n"); | |
1702 | } else { | |
1703 | reiserfs_info(s, "using writeback data mode\n"); | |
1704 | } | |
1705 | if (reiserfs_barrier_flush(s)) { | |
1706 | printk("reiserfs: using flush barriers\n"); | |
1707 | } | |
1708 | // set_device_ro(s->s_dev, 1) ; | |
1709 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { | |
1710 | SWARN(silent, s, | |
1711 | "sh-2022: reiserfs_fill_super: unable to initialize journal space"); | |
1712 | goto error; | |
1713 | } else { | |
1714 | jinit_done = 1; /* once this is set, journal_release must be called | |
1715 | ** if we error out of the mount | |
1716 | */ | |
1717 | } | |
1718 | if (reread_meta_blocks(s)) { | |
1719 | SWARN(silent, s, | |
1720 | "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init"); | |
1721 | goto error; | |
1722 | } | |
1723 | ||
1724 | if (replay_only(s)) | |
1725 | goto error; | |
1726 | ||
1727 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { | |
1728 | SWARN(silent, s, | |
1729 | "clm-7000: Detected readonly device, marking FS readonly"); | |
1730 | s->s_flags |= MS_RDONLY; | |
1731 | } | |
1732 | args.objectid = REISERFS_ROOT_OBJECTID; | |
1733 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; | |
1734 | root_inode = | |
1735 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, | |
1736 | reiserfs_init_locked_inode, (void *)(&args)); | |
1737 | if (!root_inode) { | |
1738 | SWARN(silent, s, | |
1739 | "jmacd-10: reiserfs_fill_super: get root inode failed"); | |
1740 | goto error; | |
1741 | } | |
1742 | ||
1743 | if (root_inode->i_state & I_NEW) { | |
1744 | reiserfs_read_locked_inode(root_inode, &args); | |
1745 | unlock_new_inode(root_inode); | |
1746 | } | |
1747 | ||
1748 | s->s_root = d_alloc_root(root_inode); | |
1749 | if (!s->s_root) { | |
1750 | iput(root_inode); | |
1751 | goto error; | |
1752 | } | |
1753 | // define and initialize hash function | |
1754 | sbi->s_hash_function = hash_function(s); | |
1755 | if (sbi->s_hash_function == NULL) { | |
1756 | dput(s->s_root); | |
1757 | s->s_root = NULL; | |
1758 | goto error; | |
1759 | } | |
1760 | ||
1761 | if (is_reiserfs_3_5(rs) | |
1762 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) | |
1763 | set_bit(REISERFS_3_5, &(sbi->s_properties)); | |
e1fabd3c JM |
1764 | else if (old_format) |
1765 | set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties)); | |
bd4c625c LT |
1766 | else |
1767 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1768 | ||
1769 | if (!(s->s_flags & MS_RDONLY)) { | |
1770 | ||
1771 | errval = journal_begin(&th, s, 1); | |
1772 | if (errval) { | |
1773 | dput(s->s_root); | |
1774 | s->s_root = NULL; | |
1775 | goto error; | |
1776 | } | |
1777 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1778 | ||
1779 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
1780 | set_sb_fs_state(rs, 0); | |
1781 | ||
cb680c1b JM |
1782 | /* Clear out s_bmap_nr if it would wrap. We can handle this |
1783 | * case, but older revisions can't. This will cause the | |
1784 | * file system to fail mount on those older implementations, | |
1785 | * avoiding corruption. -jeffm */ | |
1786 | if (bmap_would_wrap(reiserfs_bmap_count(s)) && | |
1787 | sb_bmap_nr(rs) != 0) { | |
1788 | reiserfs_warning(s, "super-2030: This file system " | |
1789 | "claims to use %u bitmap blocks in " | |
1790 | "its super block, but requires %u. " | |
1791 | "Clearing to zero.", sb_bmap_nr(rs), | |
1792 | reiserfs_bmap_count(s)); | |
1793 | ||
1794 | set_sb_bmap_nr(rs, 0); | |
1795 | } | |
1796 | ||
bd4c625c LT |
1797 | if (old_format_only(s)) { |
1798 | /* filesystem of format 3.5 either with standard or non-standard | |
1799 | journal */ | |
1800 | if (convert_reiserfs(s)) { | |
1801 | /* and -o conv is given */ | |
1802 | if (!silent) | |
1803 | reiserfs_info(s, | |
1804 | "converting 3.5 filesystem to the 3.6 format"); | |
1805 | ||
1806 | if (is_reiserfs_3_5(rs)) | |
1807 | /* put magic string of 3.6 format. 2.2 will not be able to | |
1808 | mount this filesystem anymore */ | |
1809 | memcpy(rs->s_v1.s_magic, | |
1810 | reiserfs_3_6_magic_string, | |
1811 | sizeof | |
1812 | (reiserfs_3_6_magic_string)); | |
1813 | ||
1814 | set_sb_version(rs, REISERFS_VERSION_2); | |
1815 | reiserfs_convert_objectid_map_v1(s); | |
1816 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1817 | clear_bit(REISERFS_3_5, &(sbi->s_properties)); | |
1818 | } else if (!silent) { | |
1819 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
1820 | } | |
1821 | } | |
1822 | ||
1823 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1824 | errval = journal_end(&th, s, 1); | |
1825 | if (errval) { | |
1826 | dput(s->s_root); | |
1827 | s->s_root = NULL; | |
1828 | goto error; | |
1829 | } | |
1830 | ||
1831 | if ((errval = reiserfs_xattr_init(s, s->s_flags))) { | |
1832 | dput(s->s_root); | |
1833 | s->s_root = NULL; | |
1834 | goto error; | |
1835 | } | |
1836 | ||
1837 | /* look for files which were to be removed in previous session */ | |
1838 | finish_unfinished(s); | |
1839 | } else { | |
1840 | if (old_format_only(s) && !silent) { | |
1841 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
1842 | } | |
1843 | ||
1844 | if ((errval = reiserfs_xattr_init(s, s->s_flags))) { | |
1845 | dput(s->s_root); | |
1846 | s->s_root = NULL; | |
1847 | goto error; | |
1848 | } | |
1849 | } | |
1850 | // mark hash in super block: it could be unset. overwrite should be ok | |
1851 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); | |
1852 | ||
1853 | handle_attrs(s); | |
1854 | ||
1855 | reiserfs_proc_info_init(s); | |
1856 | ||
1857 | init_waitqueue_head(&(sbi->s_wait)); | |
1858 | spin_lock_init(&sbi->bitmap_lock); | |
1859 | ||
1860 | return (0); | |
1861 | ||
00b44197 | 1862 | error: |
bd4c625c LT |
1863 | if (jinit_done) { /* kill the commit thread, free journal ram */ |
1864 | journal_release_error(NULL, s); | |
1865 | } | |
5065227b JM |
1866 | |
1867 | reiserfs_free_bitmap_cache(s); | |
bd4c625c LT |
1868 | if (SB_BUFFER_WITH_SB(s)) |
1869 | brelse(SB_BUFFER_WITH_SB(s)); | |
1da177e4 | 1870 | #ifdef CONFIG_QUOTA |
5065227b JM |
1871 | { |
1872 | int j; | |
00b44197 JK |
1873 | for (j = 0; j < MAXQUOTAS; j++) |
1874 | kfree(qf_names[j]); | |
bd4c625c | 1875 | } |
1da177e4 | 1876 | #endif |
833d304b | 1877 | kfree(sbi); |
1da177e4 | 1878 | |
bd4c625c LT |
1879 | s->s_fs_info = NULL; |
1880 | return errval; | |
1da177e4 LT |
1881 | } |
1882 | ||
726c3342 | 1883 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1884 | { |
726c3342 | 1885 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
bd4c625c LT |
1886 | |
1887 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); | |
1888 | buf->f_bfree = sb_free_blocks(rs); | |
1889 | buf->f_bavail = buf->f_bfree; | |
1890 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; | |
726c3342 | 1891 | buf->f_bsize = dentry->d_sb->s_blocksize; |
bd4c625c LT |
1892 | /* changed to accommodate gcc folks. */ |
1893 | buf->f_type = REISERFS_SUPER_MAGIC; | |
1894 | return 0; | |
1da177e4 LT |
1895 | } |
1896 | ||
1897 | #ifdef CONFIG_QUOTA | |
1898 | static int reiserfs_dquot_initialize(struct inode *inode, int type) | |
1899 | { | |
bd4c625c LT |
1900 | struct reiserfs_transaction_handle th; |
1901 | int ret, err; | |
1902 | ||
1903 | /* We may create quota structure so we need to reserve enough blocks */ | |
1904 | reiserfs_write_lock(inode->i_sb); | |
1905 | ret = | |
1906 | journal_begin(&th, inode->i_sb, | |
1907 | 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb)); | |
1908 | if (ret) | |
1909 | goto out; | |
1910 | ret = dquot_initialize(inode, type); | |
1911 | err = | |
1912 | journal_end(&th, inode->i_sb, | |
1913 | 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb)); | |
1914 | if (!ret && err) | |
1915 | ret = err; | |
1916 | out: | |
1917 | reiserfs_write_unlock(inode->i_sb); | |
1918 | return ret; | |
1da177e4 LT |
1919 | } |
1920 | ||
1921 | static int reiserfs_dquot_drop(struct inode *inode) | |
1922 | { | |
bd4c625c LT |
1923 | struct reiserfs_transaction_handle th; |
1924 | int ret, err; | |
1925 | ||
1926 | /* We may delete quota structure so we need to reserve enough blocks */ | |
1927 | reiserfs_write_lock(inode->i_sb); | |
1928 | ret = | |
1929 | journal_begin(&th, inode->i_sb, | |
1930 | 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)); | |
a2fe594f JK |
1931 | if (ret) { |
1932 | /* | |
1933 | * We call dquot_drop() anyway to at least release references | |
1934 | * to quota structures so that umount does not hang. | |
1935 | */ | |
1936 | dquot_drop(inode); | |
bd4c625c | 1937 | goto out; |
a2fe594f | 1938 | } |
bd4c625c LT |
1939 | ret = dquot_drop(inode); |
1940 | err = | |
1941 | journal_end(&th, inode->i_sb, | |
1942 | 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)); | |
1943 | if (!ret && err) | |
1944 | ret = err; | |
1945 | out: | |
1946 | reiserfs_write_unlock(inode->i_sb); | |
1947 | return ret; | |
1da177e4 LT |
1948 | } |
1949 | ||
1950 | static int reiserfs_write_dquot(struct dquot *dquot) | |
1951 | { | |
bd4c625c LT |
1952 | struct reiserfs_transaction_handle th; |
1953 | int ret, err; | |
1954 | ||
1955 | reiserfs_write_lock(dquot->dq_sb); | |
1956 | ret = | |
1957 | journal_begin(&th, dquot->dq_sb, | |
1958 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
1959 | if (ret) | |
1960 | goto out; | |
1961 | ret = dquot_commit(dquot); | |
1962 | err = | |
1963 | journal_end(&th, dquot->dq_sb, | |
1964 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
1965 | if (!ret && err) | |
1966 | ret = err; | |
1967 | out: | |
1968 | reiserfs_write_unlock(dquot->dq_sb); | |
1969 | return ret; | |
1da177e4 LT |
1970 | } |
1971 | ||
1972 | static int reiserfs_acquire_dquot(struct dquot *dquot) | |
1973 | { | |
bd4c625c LT |
1974 | struct reiserfs_transaction_handle th; |
1975 | int ret, err; | |
1976 | ||
1977 | reiserfs_write_lock(dquot->dq_sb); | |
1978 | ret = | |
1979 | journal_begin(&th, dquot->dq_sb, | |
1980 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
1981 | if (ret) | |
1982 | goto out; | |
1983 | ret = dquot_acquire(dquot); | |
1984 | err = | |
1985 | journal_end(&th, dquot->dq_sb, | |
1986 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
1987 | if (!ret && err) | |
1988 | ret = err; | |
1989 | out: | |
1990 | reiserfs_write_unlock(dquot->dq_sb); | |
1991 | return ret; | |
1da177e4 LT |
1992 | } |
1993 | ||
1994 | static int reiserfs_release_dquot(struct dquot *dquot) | |
1995 | { | |
bd4c625c LT |
1996 | struct reiserfs_transaction_handle th; |
1997 | int ret, err; | |
1998 | ||
1999 | reiserfs_write_lock(dquot->dq_sb); | |
2000 | ret = | |
2001 | journal_begin(&th, dquot->dq_sb, | |
2002 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
2003 | if (ret) { |
2004 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2005 | dquot_release(dquot); | |
bd4c625c | 2006 | goto out; |
9c3013e9 | 2007 | } |
bd4c625c LT |
2008 | ret = dquot_release(dquot); |
2009 | err = | |
2010 | journal_end(&th, dquot->dq_sb, | |
2011 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
2012 | if (!ret && err) | |
2013 | ret = err; | |
2014 | out: | |
2015 | reiserfs_write_unlock(dquot->dq_sb); | |
2016 | return ret; | |
1da177e4 LT |
2017 | } |
2018 | ||
2019 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) | |
2020 | { | |
4506567b | 2021 | /* Are we journaling quotas? */ |
bd4c625c LT |
2022 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2023 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2024 | dquot_mark_dquot_dirty(dquot); | |
2025 | return reiserfs_write_dquot(dquot); | |
2026 | } else | |
2027 | return dquot_mark_dquot_dirty(dquot); | |
1da177e4 LT |
2028 | } |
2029 | ||
2030 | static int reiserfs_write_info(struct super_block *sb, int type) | |
2031 | { | |
bd4c625c LT |
2032 | struct reiserfs_transaction_handle th; |
2033 | int ret, err; | |
2034 | ||
2035 | /* Data block + inode block */ | |
2036 | reiserfs_write_lock(sb); | |
2037 | ret = journal_begin(&th, sb, 2); | |
2038 | if (ret) | |
2039 | goto out; | |
2040 | ret = dquot_commit_info(sb, type); | |
2041 | err = journal_end(&th, sb, 2); | |
2042 | if (!ret && err) | |
2043 | ret = err; | |
2044 | out: | |
2045 | reiserfs_write_unlock(sb); | |
2046 | return ret; | |
1da177e4 LT |
2047 | } |
2048 | ||
2049 | /* | |
84de856e | 2050 | * Turn on quotas during mount time - we need to find the quota file and such... |
1da177e4 LT |
2051 | */ |
2052 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) | |
2053 | { | |
84de856e | 2054 | return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
bd4c625c | 2055 | REISERFS_SB(sb)->s_jquota_fmt, type); |
1da177e4 LT |
2056 | } |
2057 | ||
2058 | /* | |
2059 | * Standard function to be called on quota_on | |
2060 | */ | |
bd4c625c | 2061 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
1b445a9c | 2062 | char *path, int remount) |
1da177e4 | 2063 | { |
bd4c625c LT |
2064 | int err; |
2065 | struct nameidata nd; | |
d5dee5c3 | 2066 | struct inode *inode; |
5d4f7fdd | 2067 | struct reiserfs_transaction_handle th; |
bd4c625c LT |
2068 | |
2069 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA))) | |
2070 | return -EINVAL; | |
1b445a9c JK |
2071 | /* No more checks needed? Path and format_id are bogus anyway... */ |
2072 | if (remount) | |
2073 | return vfs_quota_on(sb, type, format_id, path, 1); | |
bd4c625c LT |
2074 | err = path_lookup(path, LOOKUP_FOLLOW, &nd); |
2075 | if (err) | |
2076 | return err; | |
2077 | /* Quotafile not on the same filesystem? */ | |
4ac91378 | 2078 | if (nd.path.mnt->mnt_sb != sb) { |
77e69dac AV |
2079 | err = -EXDEV; |
2080 | goto out; | |
bd4c625c | 2081 | } |
d5dee5c3 | 2082 | inode = nd.path.dentry->d_inode; |
bd4c625c | 2083 | /* We must not pack tails for quota files on reiserfs for quota IO to work */ |
d5dee5c3 JK |
2084 | if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
2085 | err = reiserfs_unpack(inode, NULL); | |
2086 | if (err) { | |
2087 | reiserfs_warning(sb, | |
2088 | "reiserfs: Unpacking tail of quota file failed" | |
2089 | " (%d). Cannot turn on quotas.", err); | |
77e69dac AV |
2090 | err = -EINVAL; |
2091 | goto out; | |
d5dee5c3 JK |
2092 | } |
2093 | mark_inode_dirty(inode); | |
bd4c625c | 2094 | } |
5d4f7fdd JK |
2095 | /* Journaling quota? */ |
2096 | if (REISERFS_SB(sb)->s_qf_names[type]) { | |
2097 | /* Quotafile not of fs root? */ | |
2098 | if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode) | |
2099 | reiserfs_warning(sb, | |
bd4c625c LT |
2100 | "reiserfs: Quota file not on filesystem root. " |
2101 | "Journalled quota will not work."); | |
5d4f7fdd JK |
2102 | } |
2103 | ||
2104 | /* | |
2105 | * When we journal data on quota file, we have to flush journal to see | |
2106 | * all updates to the file when we bypass pagecache... | |
2107 | */ | |
2108 | if (reiserfs_file_data_log(inode)) { | |
2109 | /* Just start temporary transaction and finish it */ | |
2110 | err = journal_begin(&th, sb, 1); | |
2111 | if (err) | |
77e69dac | 2112 | goto out; |
5d4f7fdd JK |
2113 | err = journal_end_sync(&th, sb, 1); |
2114 | if (err) | |
77e69dac | 2115 | goto out; |
5d4f7fdd | 2116 | } |
77e69dac AV |
2117 | err = vfs_quota_on_path(sb, type, format_id, &nd.path); |
2118 | out: | |
1d957f9b | 2119 | path_put(&nd.path); |
77e69dac | 2120 | return err; |
1da177e4 LT |
2121 | } |
2122 | ||
2123 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2124 | * acquiring the locks... As quota files are never truncated and quota code | |
2125 | * itself serializes the operations (and noone else should touch the files) | |
2126 | * we don't have to be afraid of races */ | |
2127 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, | |
2128 | size_t len, loff_t off) | |
2129 | { | |
bd4c625c LT |
2130 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2131 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2132 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2133 | size_t toread; | |
2134 | struct buffer_head tmp_bh, *bh; | |
2135 | loff_t i_size = i_size_read(inode); | |
2136 | ||
2137 | if (off > i_size) | |
2138 | return 0; | |
2139 | if (off + len > i_size) | |
2140 | len = i_size - off; | |
2141 | toread = len; | |
2142 | while (toread > 0) { | |
2143 | tocopy = | |
2144 | sb->s_blocksize - offset < | |
2145 | toread ? sb->s_blocksize - offset : toread; | |
2146 | tmp_bh.b_state = 0; | |
2147 | /* Quota files are without tails so we can safely use this function */ | |
2148 | reiserfs_write_lock(sb); | |
2149 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); | |
2150 | reiserfs_write_unlock(sb); | |
2151 | if (err) | |
2152 | return err; | |
2153 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
2154 | memset(data, 0, tocopy); | |
2155 | else { | |
2156 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2157 | if (!bh) | |
2158 | return -EIO; | |
2159 | memcpy(data, bh->b_data + offset, tocopy); | |
2160 | brelse(bh); | |
2161 | } | |
2162 | offset = 0; | |
2163 | toread -= tocopy; | |
2164 | data += tocopy; | |
2165 | blk++; | |
2166 | } | |
2167 | return len; | |
1da177e4 LT |
2168 | } |
2169 | ||
2170 | /* Write to quotafile (we know the transaction is already started and has | |
2171 | * enough credits) */ | |
2172 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, | |
2173 | const char *data, size_t len, loff_t off) | |
2174 | { | |
bd4c625c LT |
2175 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2176 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2177 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2178 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; | |
2179 | size_t towrite = len; | |
2180 | struct buffer_head tmp_bh, *bh; | |
2181 | ||
9c3013e9 JK |
2182 | if (!current->journal_info) { |
2183 | printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)" | |
2184 | " cancelled because transaction is not started.\n", | |
2185 | (unsigned long long)off, (unsigned long long)len); | |
2186 | return -EIO; | |
2187 | } | |
5c81a419 | 2188 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
bd4c625c LT |
2189 | while (towrite > 0) { |
2190 | tocopy = sb->s_blocksize - offset < towrite ? | |
2191 | sb->s_blocksize - offset : towrite; | |
2192 | tmp_bh.b_state = 0; | |
2193 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); | |
2194 | if (err) | |
2195 | goto out; | |
2196 | if (offset || tocopy != sb->s_blocksize) | |
2197 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2198 | else | |
2199 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
2200 | if (!bh) { | |
2201 | err = -EIO; | |
2202 | goto out; | |
2203 | } | |
2204 | lock_buffer(bh); | |
2205 | memcpy(bh->b_data + offset, data, tocopy); | |
2206 | flush_dcache_page(bh->b_page); | |
2207 | set_buffer_uptodate(bh); | |
2208 | unlock_buffer(bh); | |
2209 | reiserfs_prepare_for_journal(sb, bh, 1); | |
2210 | journal_mark_dirty(current->journal_info, sb, bh); | |
2211 | if (!journal_quota) | |
2212 | reiserfs_add_ordered_list(inode, bh); | |
2213 | brelse(bh); | |
2214 | offset = 0; | |
2215 | towrite -= tocopy; | |
2216 | data += tocopy; | |
2217 | blk++; | |
2218 | } | |
9c3013e9 | 2219 | out: |
10dd08dc JK |
2220 | if (len == towrite) { |
2221 | mutex_unlock(&inode->i_mutex); | |
bd4c625c | 2222 | return err; |
10dd08dc | 2223 | } |
bd4c625c LT |
2224 | if (inode->i_size < off + len - towrite) |
2225 | i_size_write(inode, off + len - towrite); | |
2226 | inode->i_version++; | |
2227 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2228 | mark_inode_dirty(inode); | |
1b1dcc1b | 2229 | mutex_unlock(&inode->i_mutex); |
bd4c625c | 2230 | return len - towrite; |
1da177e4 LT |
2231 | } |
2232 | ||
2233 | #endif | |
2234 | ||
454e2398 DH |
2235 | static int get_super_block(struct file_system_type *fs_type, |
2236 | int flags, const char *dev_name, | |
2237 | void *data, struct vfsmount *mnt) | |
1da177e4 | 2238 | { |
454e2398 DH |
2239 | return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super, |
2240 | mnt); | |
1da177e4 LT |
2241 | } |
2242 | ||
bd4c625c | 2243 | static int __init init_reiserfs_fs(void) |
1da177e4 LT |
2244 | { |
2245 | int ret; | |
2246 | ||
bd4c625c | 2247 | if ((ret = init_inodecache())) { |
1da177e4 LT |
2248 | return ret; |
2249 | } | |
2250 | ||
bd4c625c LT |
2251 | if ((ret = reiserfs_xattr_register_handlers())) |
2252 | goto failed_reiserfs_xattr_register_handlers; | |
1da177e4 | 2253 | |
bd4c625c LT |
2254 | reiserfs_proc_info_global_init(); |
2255 | reiserfs_proc_register_global("version", | |
2256 | reiserfs_global_version_in_proc); | |
1da177e4 | 2257 | |
bd4c625c | 2258 | ret = register_filesystem(&reiserfs_fs_type); |
1da177e4 LT |
2259 | |
2260 | if (ret == 0) { | |
2261 | return 0; | |
2262 | } | |
2263 | ||
bd4c625c | 2264 | reiserfs_xattr_unregister_handlers(); |
1da177e4 | 2265 | |
bd4c625c LT |
2266 | failed_reiserfs_xattr_register_handlers: |
2267 | reiserfs_proc_unregister_global("version"); | |
2268 | reiserfs_proc_info_global_done(); | |
2269 | destroy_inodecache(); | |
1da177e4 LT |
2270 | |
2271 | return ret; | |
2272 | } | |
2273 | ||
bd4c625c | 2274 | static void __exit exit_reiserfs_fs(void) |
1da177e4 | 2275 | { |
bd4c625c LT |
2276 | reiserfs_xattr_unregister_handlers(); |
2277 | reiserfs_proc_unregister_global("version"); | |
2278 | reiserfs_proc_info_global_done(); | |
2279 | unregister_filesystem(&reiserfs_fs_type); | |
2280 | destroy_inodecache(); | |
1da177e4 LT |
2281 | } |
2282 | ||
2283 | struct file_system_type reiserfs_fs_type = { | |
bd4c625c LT |
2284 | .owner = THIS_MODULE, |
2285 | .name = "reiserfs", | |
2286 | .get_sb = get_super_block, | |
edc666e2 | 2287 | .kill_sb = reiserfs_kill_sb, |
bd4c625c | 2288 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 LT |
2289 | }; |
2290 | ||
bd4c625c LT |
2291 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
2292 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); | |
2293 | MODULE_LICENSE("GPL"); | |
1da177e4 | 2294 | |
bd4c625c LT |
2295 | module_init(init_reiserfs_fs); |
2296 | module_exit(exit_reiserfs_fs); |