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