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Commit | Line | Data |
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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 | 14 | #include <linux/module.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
1da177e4 LT |
16 | #include <linux/vmalloc.h> |
17 | #include <linux/time.h> | |
18 | #include <asm/uaccess.h> | |
19 | #include <linux/reiserfs_fs.h> | |
20 | #include <linux/reiserfs_acl.h> | |
21 | #include <linux/reiserfs_xattr.h> | |
1da177e4 LT |
22 | #include <linux/init.h> |
23 | #include <linux/blkdev.h> | |
24 | #include <linux/buffer_head.h> | |
a5694255 | 25 | #include <linux/exportfs.h> |
74abb989 | 26 | #include <linux/quotaops.h> |
1da177e4 | 27 | #include <linux/vfs.h> |
1da177e4 LT |
28 | #include <linux/mount.h> |
29 | #include <linux/namei.h> | |
651d0623 | 30 | #include <linux/crc32.h> |
1da177e4 LT |
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 | { |
5af7926f CH |
67 | struct reiserfs_transaction_handle th; |
68 | ||
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); | |
bd4c625c | 76 | return 0; |
1da177e4 LT |
77 | } |
78 | ||
79 | static void reiserfs_write_super(struct super_block *s) | |
80 | { | |
bd4c625c | 81 | reiserfs_sync_fs(s, 1); |
1da177e4 LT |
82 | } |
83 | ||
c4be0c1d | 84 | static int reiserfs_freeze(struct super_block *s) |
1da177e4 | 85 | { |
bd4c625c LT |
86 | struct reiserfs_transaction_handle th; |
87 | reiserfs_write_lock(s); | |
88 | if (!(s->s_flags & MS_RDONLY)) { | |
89 | int err = journal_begin(&th, s, 1); | |
90 | if (err) { | |
91 | reiserfs_block_writes(&th); | |
92 | } else { | |
93 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
94 | 1); | |
95 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
96 | reiserfs_block_writes(&th); | |
97 | journal_end_sync(&th, s, 1); | |
98 | } | |
99 | } | |
100 | s->s_dirt = 0; | |
101 | reiserfs_write_unlock(s); | |
c4be0c1d | 102 | return 0; |
1da177e4 LT |
103 | } |
104 | ||
c4be0c1d | 105 | static int reiserfs_unfreeze(struct super_block *s) |
bd4c625c LT |
106 | { |
107 | reiserfs_allow_writes(s); | |
c4be0c1d | 108 | return 0; |
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; | |
fb46f341 | 148 | struct reiserfs_key save_link_key, last_inode_key; |
bd4c625c LT |
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; | |
f4b113ae | 160 | int quota_enabled[MAXQUOTAS]; |
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++) { | |
f4b113ae | 182 | quota_enabled[i] = 1; |
bd4c625c | 183 | if (REISERFS_SB(s)->s_qf_names[i]) { |
f4b113ae JK |
184 | int ret; |
185 | ||
186 | if (sb_has_quota_active(s, i)) { | |
187 | quota_enabled[i] = 0; | |
188 | continue; | |
189 | } | |
190 | ret = reiserfs_quota_on_mount(s, i); | |
bd4c625c | 191 | if (ret < 0) |
45b03d5e JM |
192 | reiserfs_warning(s, "reiserfs-2500", |
193 | "cannot turn on journaled " | |
194 | "quota: error %d", ret); | |
bd4c625c LT |
195 | } |
196 | } | |
1da177e4 | 197 | #endif |
bd4c625c LT |
198 | |
199 | done = 0; | |
200 | REISERFS_SB(s)->s_is_unlinked_ok = 1; | |
201 | while (!retval) { | |
202 | retval = search_item(s, &max_cpu_key, &path); | |
203 | if (retval != ITEM_NOT_FOUND) { | |
0030b645 JM |
204 | reiserfs_error(s, "vs-2140", |
205 | "search_by_key returned %d", retval); | |
bd4c625c LT |
206 | break; |
207 | } | |
208 | ||
209 | bh = get_last_bh(&path); | |
210 | item_pos = get_item_pos(&path); | |
211 | if (item_pos != B_NR_ITEMS(bh)) { | |
45b03d5e JM |
212 | reiserfs_warning(s, "vs-2060", |
213 | "wrong position found"); | |
bd4c625c LT |
214 | break; |
215 | } | |
216 | item_pos--; | |
217 | ih = B_N_PITEM_HEAD(bh, item_pos); | |
218 | ||
219 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) | |
220 | /* there are no "save" links anymore */ | |
221 | break; | |
222 | ||
223 | save_link_key = ih->ih_key; | |
224 | if (is_indirect_le_ih(ih)) | |
225 | truncate = 1; | |
226 | else | |
227 | truncate = 0; | |
228 | ||
229 | /* reiserfs_iget needs k_dirid and k_objectid only */ | |
230 | item = B_I_PITEM(bh, ih); | |
231 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); | |
232 | obj_key.on_disk_key.k_objectid = | |
233 | le32_to_cpu(ih->ih_key.k_objectid); | |
234 | obj_key.on_disk_key.k_offset = 0; | |
235 | obj_key.on_disk_key.k_type = 0; | |
236 | ||
237 | pathrelse(&path); | |
238 | ||
239 | inode = reiserfs_iget(s, &obj_key); | |
240 | if (!inode) { | |
241 | /* the unlink almost completed, it just did not manage to remove | |
242 | "save" link and release objectid */ | |
45b03d5e | 243 | reiserfs_warning(s, "vs-2180", "iget failed for %K", |
bd4c625c LT |
244 | &obj_key); |
245 | retval = remove_save_link_only(s, &save_link_key, 1); | |
246 | continue; | |
247 | } | |
248 | ||
249 | if (!truncate && inode->i_nlink) { | |
250 | /* file is not unlinked */ | |
45b03d5e JM |
251 | reiserfs_warning(s, "vs-2185", |
252 | "file %K is not unlinked", | |
bd4c625c LT |
253 | &obj_key); |
254 | retval = remove_save_link_only(s, &save_link_key, 0); | |
255 | continue; | |
256 | } | |
871a2931 | 257 | dquot_initialize(inode); |
bd4c625c LT |
258 | |
259 | if (truncate && S_ISDIR(inode->i_mode)) { | |
260 | /* We got a truncate request for a dir which is impossible. | |
261 | The only imaginable way is to execute unfinished truncate request | |
262 | then boot into old kernel, remove the file and create dir with | |
263 | the same key. */ | |
45b03d5e JM |
264 | reiserfs_warning(s, "green-2101", |
265 | "impossible truncate on a " | |
266 | "directory %k. Please report", | |
bd4c625c LT |
267 | INODE_PKEY(inode)); |
268 | retval = remove_save_link_only(s, &save_link_key, 0); | |
269 | truncate = 0; | |
270 | iput(inode); | |
271 | continue; | |
272 | } | |
273 | ||
274 | if (truncate) { | |
275 | REISERFS_I(inode)->i_flags |= | |
276 | i_link_saved_truncate_mask; | |
277 | /* not completed truncate found. New size was committed together | |
278 | with "save" link */ | |
279 | reiserfs_info(s, "Truncating %k to %Ld ..", | |
280 | INODE_PKEY(inode), inode->i_size); | |
281 | reiserfs_truncate_file(inode, | |
282 | 0 | |
283 | /*don't update modification time */ | |
284 | ); | |
285 | retval = remove_save_link(inode, truncate); | |
286 | } else { | |
287 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
288 | /* not completed unlink (rmdir) found */ | |
289 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); | |
fb46f341 LW |
290 | if (memcmp(&last_inode_key, INODE_PKEY(inode), |
291 | sizeof(last_inode_key))){ | |
292 | last_inode_key = *INODE_PKEY(inode); | |
293 | /* removal gets completed in iput */ | |
294 | retval = 0; | |
295 | } else { | |
45b03d5e JM |
296 | reiserfs_warning(s, "super-2189", "Dead loop " |
297 | "in finish_unfinished " | |
298 | "detected, just remove " | |
299 | "save link\n"); | |
fb46f341 LW |
300 | retval = remove_save_link_only(s, |
301 | &save_link_key, 0); | |
302 | } | |
bd4c625c LT |
303 | } |
304 | ||
305 | iput(inode); | |
306 | printk("done\n"); | |
307 | done++; | |
308 | } | |
309 | REISERFS_SB(s)->s_is_unlinked_ok = 0; | |
310 | ||
1da177e4 | 311 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
312 | /* Turn quotas off */ |
313 | for (i = 0; i < MAXQUOTAS; i++) { | |
f4b113ae | 314 | if (sb_dqopt(s)->files[i] && quota_enabled[i]) |
287a8095 | 315 | dquot_quota_off(s, i); |
bd4c625c LT |
316 | } |
317 | if (ms_active_set) | |
318 | /* Restore the flag back */ | |
319 | s->s_flags &= ~MS_ACTIVE; | |
1da177e4 | 320 | #endif |
bd4c625c LT |
321 | pathrelse(&path); |
322 | if (done) | |
323 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " | |
324 | "Completed\n", done); | |
325 | return retval; | |
1da177e4 | 326 | } |
bd4c625c | 327 | |
1da177e4 LT |
328 | /* to protect file being unlinked from getting lost we "safe" link files |
329 | being unlinked. This link will be deleted in the same transaction with last | |
3a4fa0a2 | 330 | item of file. mounting the filesystem we scan all these links and remove |
1da177e4 | 331 | files which almost got lost */ |
bd4c625c LT |
332 | void add_save_link(struct reiserfs_transaction_handle *th, |
333 | struct inode *inode, int truncate) | |
1da177e4 | 334 | { |
bd4c625c LT |
335 | INITIALIZE_PATH(path); |
336 | int retval; | |
337 | struct cpu_key key; | |
338 | struct item_head ih; | |
339 | __le32 link; | |
340 | ||
341 | BUG_ON(!th->t_trans_id); | |
342 | ||
343 | /* file can only get one "save link" of each kind */ | |
344 | RFALSE(truncate && | |
345 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), | |
346 | "saved link already exists for truncated inode %lx", | |
347 | (long)inode->i_ino); | |
348 | RFALSE(!truncate && | |
349 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), | |
350 | "saved link already exists for unlinked inode %lx", | |
351 | (long)inode->i_ino); | |
352 | ||
353 | /* setup key of "save" link */ | |
354 | key.version = KEY_FORMAT_3_5; | |
355 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; | |
356 | key.on_disk_key.k_objectid = inode->i_ino; | |
357 | if (!truncate) { | |
358 | /* unlink, rmdir, rename */ | |
359 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); | |
360 | set_cpu_key_k_type(&key, TYPE_DIRECT); | |
361 | ||
362 | /* item head of "safe" link */ | |
363 | make_le_item_head(&ih, &key, key.version, | |
364 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, | |
365 | 4 /*length */ , 0xffff /*free space */ ); | |
366 | } else { | |
367 | /* truncate */ | |
368 | if (S_ISDIR(inode->i_mode)) | |
45b03d5e JM |
369 | reiserfs_warning(inode->i_sb, "green-2102", |
370 | "Adding a truncate savelink for " | |
371 | "a directory %k! Please report", | |
bd4c625c LT |
372 | INODE_PKEY(inode)); |
373 | set_cpu_key_k_offset(&key, 1); | |
374 | set_cpu_key_k_type(&key, TYPE_INDIRECT); | |
375 | ||
376 | /* item head of "safe" link */ | |
377 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, | |
378 | 4 /*length */ , 0 /*free space */ ); | |
379 | } | |
380 | key.key_length = 3; | |
381 | ||
382 | /* look for its place in the tree */ | |
383 | retval = search_item(inode->i_sb, &key, &path); | |
384 | if (retval != ITEM_NOT_FOUND) { | |
385 | if (retval != -ENOSPC) | |
0030b645 JM |
386 | reiserfs_error(inode->i_sb, "vs-2100", |
387 | "search_by_key (%K) returned %d", &key, | |
388 | retval); | |
bd4c625c LT |
389 | pathrelse(&path); |
390 | return; | |
391 | } | |
1da177e4 | 392 | |
bd4c625c LT |
393 | /* body of "save" link */ |
394 | link = INODE_PKEY(inode)->k_dir_id; | |
395 | ||
25985edc | 396 | /* put "save" link into tree, don't charge quota to anyone */ |
bd4c625c LT |
397 | retval = |
398 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); | |
399 | if (retval) { | |
400 | if (retval != -ENOSPC) | |
0030b645 JM |
401 | reiserfs_error(inode->i_sb, "vs-2120", |
402 | "insert_item returned %d", retval); | |
bd4c625c LT |
403 | } else { |
404 | if (truncate) | |
405 | REISERFS_I(inode)->i_flags |= | |
406 | i_link_saved_truncate_mask; | |
407 | else | |
408 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
409 | } | |
410 | } | |
1da177e4 LT |
411 | |
412 | /* this opens transaction unlike add_save_link */ | |
bd4c625c | 413 | int remove_save_link(struct inode *inode, int truncate) |
1da177e4 | 414 | { |
bd4c625c LT |
415 | struct reiserfs_transaction_handle th; |
416 | struct reiserfs_key key; | |
417 | int err; | |
418 | ||
419 | /* we are going to do one balancing only */ | |
420 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
421 | if (err) | |
422 | return err; | |
423 | ||
424 | /* setup key of "save" link */ | |
425 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); | |
426 | key.k_objectid = INODE_PKEY(inode)->k_objectid; | |
427 | if (!truncate) { | |
428 | /* unlink, rmdir, rename */ | |
429 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, | |
430 | 1 + inode->i_sb->s_blocksize); | |
431 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); | |
432 | } else { | |
433 | /* truncate */ | |
434 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); | |
435 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); | |
436 | } | |
1da177e4 | 437 | |
bd4c625c LT |
438 | if ((truncate && |
439 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || | |
440 | (!truncate && | |
441 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) | |
442 | /* don't take quota bytes from anywhere */ | |
443 | reiserfs_delete_solid_item(&th, NULL, &key); | |
444 | if (!truncate) { | |
445 | reiserfs_release_objectid(&th, inode->i_ino); | |
446 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; | |
447 | } else | |
448 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; | |
449 | ||
450 | return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
451 | } | |
1da177e4 | 452 | |
edc666e2 | 453 | static void reiserfs_kill_sb(struct super_block *s) |
1da177e4 | 454 | { |
edc666e2 DH |
455 | if (REISERFS_SB(s)) { |
456 | if (REISERFS_SB(s)->xattr_root) { | |
457 | d_invalidate(REISERFS_SB(s)->xattr_root); | |
458 | dput(REISERFS_SB(s)->xattr_root); | |
459 | REISERFS_SB(s)->xattr_root = NULL; | |
460 | } | |
edc666e2 DH |
461 | if (REISERFS_SB(s)->priv_root) { |
462 | d_invalidate(REISERFS_SB(s)->priv_root); | |
463 | dput(REISERFS_SB(s)->priv_root); | |
464 | REISERFS_SB(s)->priv_root = NULL; | |
465 | } | |
bd4c625c LT |
466 | } |
467 | ||
edc666e2 DH |
468 | kill_block_super(s); |
469 | } | |
470 | ||
471 | static void reiserfs_put_super(struct super_block *s) | |
472 | { | |
473 | struct reiserfs_transaction_handle th; | |
474 | th.t_trans_id = 0; | |
bd4c625c | 475 | |
e0ccfd95 CH |
476 | dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
477 | ||
8ebc4232 | 478 | reiserfs_write_lock(s); |
6cfd0148 | 479 | |
8c85e125 CH |
480 | if (s->s_dirt) |
481 | reiserfs_write_super(s); | |
482 | ||
bd4c625c LT |
483 | /* change file system state to current state if it was mounted with read-write permissions */ |
484 | if (!(s->s_flags & MS_RDONLY)) { | |
485 | if (!journal_begin(&th, s, 10)) { | |
486 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
487 | 1); | |
488 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), | |
489 | REISERFS_SB(s)->s_mount_state); | |
490 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
491 | } | |
492 | } | |
493 | ||
494 | /* note, journal_release checks for readonly mount, and can decide not | |
495 | ** to do a journal_end | |
496 | */ | |
497 | journal_release(&th, s); | |
498 | ||
5065227b | 499 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
500 | |
501 | brelse(SB_BUFFER_WITH_SB(s)); | |
502 | ||
503 | print_statistics(s); | |
504 | ||
bd4c625c | 505 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
45b03d5e | 506 | reiserfs_warning(s, "green-2005", "reserved blocks left %d", |
bd4c625c LT |
507 | REISERFS_SB(s)->reserved_blocks); |
508 | } | |
509 | ||
510 | reiserfs_proc_info_done(s); | |
511 | ||
8ebc4232 FW |
512 | reiserfs_write_unlock(s); |
513 | mutex_destroy(&REISERFS_SB(s)->lock); | |
bd4c625c LT |
514 | kfree(s->s_fs_info); |
515 | s->s_fs_info = NULL; | |
1da177e4 LT |
516 | } |
517 | ||
e18b890b | 518 | static struct kmem_cache *reiserfs_inode_cachep; |
1da177e4 LT |
519 | |
520 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) | |
521 | { | |
522 | struct reiserfs_inode_info *ei; | |
bd4c625c | 523 | ei = (struct reiserfs_inode_info *) |
e94b1766 | 524 | kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
525 | if (!ei) |
526 | return NULL; | |
0e4f6a79 AV |
527 | atomic_set(&ei->openers, 0); |
528 | mutex_init(&ei->tailpack); | |
1da177e4 LT |
529 | return &ei->vfs_inode; |
530 | } | |
531 | ||
fa0d7e3d | 532 | static void reiserfs_i_callback(struct rcu_head *head) |
1da177e4 | 533 | { |
fa0d7e3d NP |
534 | struct inode *inode = container_of(head, struct inode, i_rcu); |
535 | INIT_LIST_HEAD(&inode->i_dentry); | |
1da177e4 LT |
536 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); |
537 | } | |
538 | ||
fa0d7e3d NP |
539 | static void reiserfs_destroy_inode(struct inode *inode) |
540 | { | |
541 | call_rcu(&inode->i_rcu, reiserfs_i_callback); | |
542 | } | |
543 | ||
51cc5068 | 544 | static void init_once(void *foo) |
1da177e4 | 545 | { |
bd4c625c | 546 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
1da177e4 | 547 | |
a35afb83 CL |
548 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
549 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 550 | } |
bd4c625c | 551 | |
1da177e4 LT |
552 | static int init_inodecache(void) |
553 | { | |
554 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", | |
bd4c625c LT |
555 | sizeof(struct |
556 | reiserfs_inode_info), | |
fffb60f9 PJ |
557 | 0, (SLAB_RECLAIM_ACCOUNT| |
558 | SLAB_MEM_SPREAD), | |
20c2df83 | 559 | init_once); |
1da177e4 LT |
560 | if (reiserfs_inode_cachep == NULL) |
561 | return -ENOMEM; | |
562 | return 0; | |
563 | } | |
564 | ||
565 | static void destroy_inodecache(void) | |
566 | { | |
1a1d92c1 | 567 | kmem_cache_destroy(reiserfs_inode_cachep); |
1da177e4 LT |
568 | } |
569 | ||
570 | /* we don't mark inodes dirty, we just log them */ | |
aa385729 | 571 | static void reiserfs_dirty_inode(struct inode *inode, int flags) |
bd4c625c LT |
572 | { |
573 | struct reiserfs_transaction_handle th; | |
574 | ||
575 | int err = 0; | |
dc8f6d89 FW |
576 | int lock_depth; |
577 | ||
bd4c625c | 578 | if (inode->i_sb->s_flags & MS_RDONLY) { |
45b03d5e JM |
579 | reiserfs_warning(inode->i_sb, "clm-6006", |
580 | "writing inode %lu on readonly FS", | |
bd4c625c LT |
581 | inode->i_ino); |
582 | return; | |
583 | } | |
dc8f6d89 | 584 | lock_depth = reiserfs_write_lock_once(inode->i_sb); |
bd4c625c LT |
585 | |
586 | /* this is really only used for atime updates, so they don't have | |
587 | ** to be included in O_SYNC or fsync | |
588 | */ | |
589 | err = journal_begin(&th, inode->i_sb, 1); | |
dc8f6d89 FW |
590 | if (err) |
591 | goto out; | |
592 | ||
bd4c625c LT |
593 | reiserfs_update_sd(&th, inode); |
594 | journal_end(&th, inode->i_sb, 1); | |
dc8f6d89 FW |
595 | |
596 | out: | |
597 | reiserfs_write_unlock_once(inode->i_sb, lock_depth); | |
1da177e4 LT |
598 | } |
599 | ||
1da177e4 | 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, | |
845a2cc0 | 612 | .evict_inode = reiserfs_evict_inode, |
bd4c625c LT |
613 | .put_super = reiserfs_put_super, |
614 | .write_super = reiserfs_write_super, | |
615 | .sync_fs = reiserfs_sync_fs, | |
c4be0c1d TS |
616 | .freeze_fs = reiserfs_freeze, |
617 | .unfreeze_fs = reiserfs_unfreeze, | |
bd4c625c LT |
618 | .statfs = reiserfs_statfs, |
619 | .remount_fs = reiserfs_remount, | |
cdf6ccc8 | 620 | .show_options = generic_show_options, |
1da177e4 | 621 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
622 | .quota_read = reiserfs_quota_read, |
623 | .quota_write = reiserfs_quota_write, | |
1da177e4 LT |
624 | #endif |
625 | }; | |
626 | ||
627 | #ifdef CONFIG_QUOTA | |
628 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
629 | ||
1da177e4 LT |
630 | static int reiserfs_write_dquot(struct dquot *); |
631 | static int reiserfs_acquire_dquot(struct dquot *); | |
632 | static int reiserfs_release_dquot(struct dquot *); | |
633 | static int reiserfs_mark_dquot_dirty(struct dquot *); | |
634 | static int reiserfs_write_info(struct super_block *, int); | |
f00c9e44 | 635 | static int reiserfs_quota_on(struct super_block *, int, int, struct path *); |
1da177e4 | 636 | |
61e225dc | 637 | static const struct dquot_operations reiserfs_quota_operations = { |
bd4c625c LT |
638 | .write_dquot = reiserfs_write_dquot, |
639 | .acquire_dquot = reiserfs_acquire_dquot, | |
640 | .release_dquot = reiserfs_release_dquot, | |
641 | .mark_dirty = reiserfs_mark_dquot_dirty, | |
642 | .write_info = reiserfs_write_info, | |
4103003b JK |
643 | .alloc_dquot = dquot_alloc, |
644 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
645 | }; |
646 | ||
0d54b217 | 647 | static const struct quotactl_ops reiserfs_qctl_operations = { |
bd4c625c | 648 | .quota_on = reiserfs_quota_on, |
287a8095 CH |
649 | .quota_off = dquot_quota_off, |
650 | .quota_sync = dquot_quota_sync, | |
651 | .get_info = dquot_get_dqinfo, | |
652 | .set_info = dquot_set_dqinfo, | |
653 | .get_dqblk = dquot_get_dqblk, | |
654 | .set_dqblk = dquot_set_dqblk, | |
1da177e4 LT |
655 | }; |
656 | #endif | |
657 | ||
39655164 | 658 | static const struct export_operations reiserfs_export_ops = { |
bd4c625c | 659 | .encode_fh = reiserfs_encode_fh, |
be55caf1 CH |
660 | .fh_to_dentry = reiserfs_fh_to_dentry, |
661 | .fh_to_parent = reiserfs_fh_to_parent, | |
bd4c625c | 662 | .get_parent = reiserfs_get_parent, |
bd4c625c | 663 | }; |
1da177e4 LT |
664 | |
665 | /* this struct is used in reiserfs_getopt () for containing the value for those | |
666 | mount options that have values rather than being toggles. */ | |
667 | typedef struct { | |
bd4c625c LT |
668 | char *value; |
669 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
670 | value is found, 0 is no bits are to be changed. */ | |
671 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
672 | value is found, 0 is no bits are to be changed. This is | |
673 | applied BEFORE setmask */ | |
1da177e4 LT |
674 | } arg_desc_t; |
675 | ||
676 | /* Set this bit in arg_required to allow empty arguments */ | |
677 | #define REISERFS_OPT_ALLOWEMPTY 31 | |
678 | ||
679 | /* this struct is used in reiserfs_getopt() for describing the set of reiserfs | |
680 | mount options */ | |
681 | typedef struct { | |
bd4c625c LT |
682 | char *option_name; |
683 | int arg_required; /* 0 if argument is not required, not 0 otherwise */ | |
684 | const arg_desc_t *values; /* list of values accepted by an option */ | |
685 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
686 | value is found, 0 is no bits are to be changed. */ | |
687 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
688 | value is found, 0 is no bits are to be changed. This is | |
689 | applied BEFORE setmask */ | |
1da177e4 LT |
690 | } opt_desc_t; |
691 | ||
692 | /* possible values for -o data= */ | |
693 | static const arg_desc_t logging_mode[] = { | |
bd4c625c LT |
694 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
695 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, | |
696 | {"journal", 1 << REISERFS_DATA_LOG, | |
697 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, | |
698 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, | |
699 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, | |
cd02b966 | 700 | {.value = NULL} |
1da177e4 LT |
701 | }; |
702 | ||
703 | /* possible values for -o barrier= */ | |
704 | static const arg_desc_t barrier_mode[] = { | |
bd4c625c LT |
705 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
706 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, | |
cd02b966 | 707 | {.value = NULL} |
1da177e4 LT |
708 | }; |
709 | ||
710 | /* possible values for "-o block-allocator=" and bits which are to be set in | |
711 | s_mount_opt of reiserfs specific part of in-core super block */ | |
712 | static const arg_desc_t balloc[] = { | |
bd4c625c LT |
713 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
714 | {"border", 0, 1 << REISERFS_NO_BORDER}, | |
715 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, | |
716 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, | |
717 | {"test4", 1 << REISERFS_TEST4, 0}, | |
718 | {"notest4", 0, 1 << REISERFS_TEST4}, | |
719 | {NULL, 0, 0} | |
1da177e4 LT |
720 | }; |
721 | ||
722 | static const arg_desc_t tails[] = { | |
bd4c625c LT |
723 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
724 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
725 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, | |
726 | {NULL, 0, 0} | |
1da177e4 LT |
727 | }; |
728 | ||
729 | static const arg_desc_t error_actions[] = { | |
bd4c625c LT |
730 | {"panic", 1 << REISERFS_ERROR_PANIC, |
731 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, | |
732 | {"ro-remount", 1 << REISERFS_ERROR_RO, | |
733 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, | |
1da177e4 | 734 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
bd4c625c LT |
735 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
736 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, | |
1da177e4 | 737 | #endif |
bd4c625c | 738 | {NULL, 0, 0}, |
1da177e4 LT |
739 | }; |
740 | ||
1da177e4 LT |
741 | /* proceed only one option from a list *cur - string containing of mount options |
742 | opts - array of options which are accepted | |
743 | opt_arg - if option is found and requires an argument and if it is specifed | |
744 | in the input - pointer to the argument is stored here | |
745 | bit_flags - if option requires to set a certain bit - it is set here | |
746 | return -1 if unknown option is found, opt->arg_required otherwise */ | |
bd4c625c LT |
747 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
748 | char **opt_arg, unsigned long *bit_flags) | |
1da177e4 | 749 | { |
bd4c625c | 750 | char *p; |
0222e657 | 751 | /* foo=bar, |
bd4c625c LT |
752 | ^ ^ ^ |
753 | | | +-- option_end | |
754 | | +-- arg_start | |
755 | +-- option_start | |
756 | */ | |
757 | const opt_desc_t *opt; | |
758 | const arg_desc_t *arg; | |
759 | ||
760 | p = *cur; | |
761 | ||
762 | /* assume argument cannot contain commas */ | |
763 | *cur = strchr(p, ','); | |
764 | if (*cur) { | |
765 | *(*cur) = '\0'; | |
766 | (*cur)++; | |
767 | } | |
768 | ||
769 | if (!strncmp(p, "alloc=", 6)) { | |
770 | /* Ugly special case, probably we should redo options parser so that | |
771 | it can understand several arguments for some options, also so that | |
772 | it can fill several bitfields with option values. */ | |
773 | if (reiserfs_parse_alloc_options(s, p + 6)) { | |
774 | return -1; | |
775 | } else { | |
776 | return 0; | |
777 | } | |
778 | } | |
779 | ||
780 | /* for every option in the list */ | |
781 | for (opt = opts; opt->option_name; opt++) { | |
782 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { | |
783 | if (bit_flags) { | |
784 | if (opt->clrmask == | |
785 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
786 | reiserfs_warning(s, "super-6500", |
787 | "%s not supported.\n", | |
bd4c625c LT |
788 | p); |
789 | else | |
790 | *bit_flags &= ~opt->clrmask; | |
791 | if (opt->setmask == | |
792 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
793 | reiserfs_warning(s, "super-6501", |
794 | "%s not supported.\n", | |
bd4c625c LT |
795 | p); |
796 | else | |
797 | *bit_flags |= opt->setmask; | |
798 | } | |
799 | break; | |
800 | } | |
801 | } | |
802 | if (!opt->option_name) { | |
45b03d5e JM |
803 | reiserfs_warning(s, "super-6502", |
804 | "unknown mount option \"%s\"", p); | |
bd4c625c LT |
805 | return -1; |
806 | } | |
807 | ||
808 | p += strlen(opt->option_name); | |
809 | switch (*p) { | |
810 | case '=': | |
811 | if (!opt->arg_required) { | |
45b03d5e JM |
812 | reiserfs_warning(s, "super-6503", |
813 | "the option \"%s\" does not " | |
814 | "require an argument\n", | |
bd4c625c LT |
815 | opt->option_name); |
816 | return -1; | |
817 | } | |
818 | break; | |
819 | ||
820 | case 0: | |
821 | if (opt->arg_required) { | |
45b03d5e JM |
822 | reiserfs_warning(s, "super-6504", |
823 | "the option \"%s\" requires an " | |
824 | "argument\n", opt->option_name); | |
bd4c625c LT |
825 | return -1; |
826 | } | |
827 | break; | |
828 | default: | |
45b03d5e JM |
829 | reiserfs_warning(s, "super-6505", |
830 | "head of option \"%s\" is only correct\n", | |
bd4c625c LT |
831 | opt->option_name); |
832 | return -1; | |
833 | } | |
834 | ||
835 | /* move to the argument, or to next option if argument is not required */ | |
836 | p++; | |
837 | ||
838 | if (opt->arg_required | |
839 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) | |
840 | && !strlen(p)) { | |
841 | /* this catches "option=," if not allowed */ | |
45b03d5e JM |
842 | reiserfs_warning(s, "super-6506", |
843 | "empty argument for \"%s\"\n", | |
bd4c625c LT |
844 | opt->option_name); |
845 | return -1; | |
846 | } | |
847 | ||
848 | if (!opt->values) { | |
849 | /* *=NULLopt_arg contains pointer to argument */ | |
850 | *opt_arg = p; | |
851 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); | |
852 | } | |
853 | ||
854 | /* values possible for this option are listed in opt->values */ | |
855 | for (arg = opt->values; arg->value; arg++) { | |
856 | if (!strcmp(p, arg->value)) { | |
857 | if (bit_flags) { | |
858 | *bit_flags &= ~arg->clrmask; | |
859 | *bit_flags |= arg->setmask; | |
860 | } | |
861 | return opt->arg_required; | |
862 | } | |
863 | } | |
864 | ||
45b03d5e JM |
865 | reiserfs_warning(s, "super-6506", |
866 | "bad value \"%s\" for option \"%s\"\n", p, | |
bd4c625c | 867 | opt->option_name); |
1da177e4 | 868 | return -1; |
1da177e4 LT |
869 | } |
870 | ||
871 | /* returns 0 if something is wrong in option string, 1 - otherwise */ | |
bd4c625c LT |
872 | static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */ |
873 | unsigned long *mount_options, | |
874 | /* after the parsing phase, contains the | |
875 | collection of bitflags defining what | |
876 | mount options were selected. */ | |
877 | unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */ | |
878 | char **jdev_name, | |
00b44197 JK |
879 | unsigned int *commit_max_age, |
880 | char **qf_names, | |
881 | unsigned int *qfmt) | |
1da177e4 | 882 | { |
bd4c625c LT |
883 | int c; |
884 | char *arg = NULL; | |
885 | char *pos; | |
886 | opt_desc_t opts[] = { | |
887 | /* Compatibility stuff, so that -o notail for old setups still work */ | |
888 | {"tails",.arg_required = 't',.values = tails}, | |
889 | {"notail",.clrmask = | |
890 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
891 | {"conv",.setmask = 1 << REISERFS_CONVERT}, | |
892 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, | |
893 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, | |
73422811 | 894 | {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, |
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 */ | |
45b03d5e JM |
957 | reiserfs_warning(s, "super-6507", |
958 | "bad value %s for " | |
959 | "-oresize\n", arg); | |
bd4c625c LT |
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) { | |
45b03d5e JM |
970 | reiserfs_warning(s, "super-6508", |
971 | "bad value %s for -ocommit\n", | |
bd4c625c LT |
972 | arg); |
973 | return 0; | |
974 | } | |
975 | *commit_max_age = (unsigned int)val; | |
1da177e4 | 976 | } |
1da177e4 | 977 | |
bd4c625c | 978 | if (c == 'w') { |
45b03d5e JM |
979 | reiserfs_warning(s, "super-6509", "nolargeio option " |
980 | "is no longer supported"); | |
36b756f2 | 981 | return 0; |
1da177e4 | 982 | } |
1da177e4 | 983 | |
bd4c625c LT |
984 | if (c == 'j') { |
985 | if (arg && *arg && jdev_name) { | |
986 | if (*jdev_name) { //Hm, already assigned? | |
45b03d5e JM |
987 | reiserfs_warning(s, "super-6510", |
988 | "journal device was " | |
989 | "already specified to " | |
990 | "be %s", *jdev_name); | |
bd4c625c LT |
991 | return 0; |
992 | } | |
993 | *jdev_name = arg; | |
994 | } | |
1da177e4 | 995 | } |
bd4c625c LT |
996 | #ifdef CONFIG_QUOTA |
997 | if (c == 'u' || c == 'g') { | |
998 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; | |
999 | ||
6929f891 | 1000 | if (sb_any_quota_loaded(s) && |
00b44197 | 1001 | (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { |
45b03d5e JM |
1002 | reiserfs_warning(s, "super-6511", |
1003 | "cannot change journaled " | |
1004 | "quota options when quota " | |
1005 | "turned on."); | |
bd4c625c LT |
1006 | return 0; |
1007 | } | |
1008 | if (*arg) { /* Some filename specified? */ | |
1009 | if (REISERFS_SB(s)->s_qf_names[qtype] | |
1010 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], | |
1011 | arg)) { | |
45b03d5e JM |
1012 | reiserfs_warning(s, "super-6512", |
1013 | "%s quota file " | |
1014 | "already specified.", | |
bd4c625c LT |
1015 | QTYPE2NAME(qtype)); |
1016 | return 0; | |
1017 | } | |
1018 | if (strchr(arg, '/')) { | |
45b03d5e JM |
1019 | reiserfs_warning(s, "super-6513", |
1020 | "quotafile must be " | |
1021 | "on filesystem root."); | |
bd4c625c LT |
1022 | return 0; |
1023 | } | |
00b44197 | 1024 | qf_names[qtype] = |
bd4c625c | 1025 | kmalloc(strlen(arg) + 1, GFP_KERNEL); |
00b44197 | 1026 | if (!qf_names[qtype]) { |
45b03d5e JM |
1027 | reiserfs_warning(s, "reiserfs-2502", |
1028 | "not enough memory " | |
1029 | "for storing " | |
1030 | "quotafile name."); | |
bd4c625c LT |
1031 | return 0; |
1032 | } | |
00b44197 | 1033 | strcpy(qf_names[qtype], arg); |
bd4c625c LT |
1034 | *mount_options |= 1 << REISERFS_QUOTA; |
1035 | } else { | |
00b44197 JK |
1036 | if (qf_names[qtype] != |
1037 | REISERFS_SB(s)->s_qf_names[qtype]) | |
1038 | kfree(qf_names[qtype]); | |
1039 | qf_names[qtype] = NULL; | |
bd4c625c | 1040 | } |
1da177e4 | 1041 | } |
bd4c625c LT |
1042 | if (c == 'f') { |
1043 | if (!strcmp(arg, "vfsold")) | |
00b44197 | 1044 | *qfmt = QFMT_VFS_OLD; |
bd4c625c | 1045 | else if (!strcmp(arg, "vfsv0")) |
00b44197 | 1046 | *qfmt = QFMT_VFS_V0; |
bd4c625c | 1047 | else { |
45b03d5e JM |
1048 | reiserfs_warning(s, "super-6514", |
1049 | "unknown quota format " | |
1050 | "specified."); | |
bd4c625c LT |
1051 | return 0; |
1052 | } | |
6929f891 | 1053 | if (sb_any_quota_loaded(s) && |
00b44197 | 1054 | *qfmt != REISERFS_SB(s)->s_jquota_fmt) { |
45b03d5e JM |
1055 | reiserfs_warning(s, "super-6515", |
1056 | "cannot change journaled " | |
1057 | "quota options when quota " | |
1058 | "turned on."); | |
00b44197 JK |
1059 | return 0; |
1060 | } | |
1da177e4 | 1061 | } |
bd4c625c LT |
1062 | #else |
1063 | if (c == 'u' || c == 'g' || c == 'f') { | |
45b03d5e JM |
1064 | reiserfs_warning(s, "reiserfs-2503", "journaled " |
1065 | "quota options not supported."); | |
bd4c625c | 1066 | return 0; |
1da177e4 | 1067 | } |
bd4c625c LT |
1068 | #endif |
1069 | } | |
1070 | ||
1071 | #ifdef CONFIG_QUOTA | |
00b44197 JK |
1072 | if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
1073 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { | |
45b03d5e JM |
1074 | reiserfs_warning(s, "super-6515", |
1075 | "journaled quota format not specified."); | |
1da177e4 | 1076 | return 0; |
1da177e4 | 1077 | } |
bd4c625c LT |
1078 | /* This checking is not precise wrt the quota type but for our purposes it is sufficient */ |
1079 | if (!(*mount_options & (1 << REISERFS_QUOTA)) | |
6929f891 | 1080 | && sb_any_quota_loaded(s)) { |
45b03d5e JM |
1081 | reiserfs_warning(s, "super-6516", "quota options must " |
1082 | "be present when quota is turned on."); | |
bd4c625c | 1083 | return 0; |
1da177e4 LT |
1084 | } |
1085 | #endif | |
556a2a45 | 1086 | |
bd4c625c | 1087 | return 1; |
1da177e4 LT |
1088 | } |
1089 | ||
bd4c625c LT |
1090 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1091 | { | |
1092 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | | |
1093 | (1 << REISERFS_DATA_ORDERED) | | |
1094 | (1 << REISERFS_DATA_WRITEBACK)); | |
1095 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); | |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) | |
1099 | { | |
bd4c625c LT |
1100 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1101 | if (!reiserfs_data_log(s)) { | |
1102 | switch_data_mode(s, REISERFS_DATA_LOG); | |
1103 | reiserfs_info(s, "switching to journaled data mode\n"); | |
1104 | } | |
1105 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { | |
1106 | if (!reiserfs_data_ordered(s)) { | |
1107 | switch_data_mode(s, REISERFS_DATA_ORDERED); | |
1108 | reiserfs_info(s, "switching to ordered data mode\n"); | |
1109 | } | |
1110 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { | |
1111 | if (!reiserfs_data_writeback(s)) { | |
1112 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); | |
1113 | reiserfs_info(s, "switching to writeback data mode\n"); | |
1114 | } | |
1115 | } | |
1da177e4 LT |
1116 | } |
1117 | ||
bd4c625c LT |
1118 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1119 | { | |
1120 | int flush = (1 << REISERFS_BARRIER_FLUSH); | |
1121 | int none = (1 << REISERFS_BARRIER_NONE); | |
1122 | int all_barrier = flush | none; | |
1123 | ||
1124 | if (bits & all_barrier) { | |
1125 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; | |
1126 | if (bits & flush) { | |
1127 | REISERFS_SB(s)->s_mount_opt |= flush; | |
1128 | printk("reiserfs: enabling write barrier flush mode\n"); | |
1129 | } else if (bits & none) { | |
1130 | REISERFS_SB(s)->s_mount_opt |= none; | |
1131 | printk("reiserfs: write barriers turned off\n"); | |
1132 | } | |
1133 | } | |
1da177e4 LT |
1134 | } |
1135 | ||
bd4c625c | 1136 | static void handle_attrs(struct super_block *s) |
1da177e4 | 1137 | { |
bd4c625c | 1138 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1139 | |
bd4c625c LT |
1140 | if (reiserfs_attrs(s)) { |
1141 | if (old_format_only(s)) { | |
45b03d5e JM |
1142 | reiserfs_warning(s, "super-6517", "cannot support " |
1143 | "attributes on 3.5.x disk format"); | |
bd4c625c | 1144 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1145 | return; |
1146 | } | |
bd4c625c | 1147 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
45b03d5e JM |
1148 | reiserfs_warning(s, "super-6518", "cannot support " |
1149 | "attributes until flag is set in " | |
1150 | "super-block"); | |
bd4c625c | 1151 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1152 | } |
1153 | } | |
1154 | } | |
1155 | ||
00b44197 JK |
1156 | #ifdef CONFIG_QUOTA |
1157 | static void handle_quota_files(struct super_block *s, char **qf_names, | |
1158 | unsigned int *qfmt) | |
1159 | { | |
1160 | int i; | |
1161 | ||
1162 | for (i = 0; i < MAXQUOTAS; i++) { | |
1163 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1164 | kfree(REISERFS_SB(s)->s_qf_names[i]); | |
1165 | REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; | |
1166 | } | |
a06d789b JK |
1167 | if (*qfmt) |
1168 | REISERFS_SB(s)->s_jquota_fmt = *qfmt; | |
00b44197 JK |
1169 | } |
1170 | #endif | |
1171 | ||
bd4c625c | 1172 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1da177e4 | 1173 | { |
bd4c625c LT |
1174 | struct reiserfs_super_block *rs; |
1175 | struct reiserfs_transaction_handle th; | |
1176 | unsigned long blocks; | |
1177 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; | |
1178 | unsigned long safe_mask = 0; | |
1179 | unsigned int commit_max_age = (unsigned int)-1; | |
1180 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
cdf6ccc8 | 1181 | char *new_opts = kstrdup(arg, GFP_KERNEL); |
bd4c625c | 1182 | int err; |
00b44197 JK |
1183 | char *qf_names[MAXQUOTAS]; |
1184 | unsigned int qfmt = 0; | |
1da177e4 | 1185 | #ifdef CONFIG_QUOTA |
bd4c625c | 1186 | int i; |
8ebc4232 | 1187 | #endif |
00b44197 | 1188 | |
8ebc4232 | 1189 | reiserfs_write_lock(s); |
00b44197 | 1190 | |
8ebc4232 | 1191 | #ifdef CONFIG_QUOTA |
00b44197 | 1192 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); |
1da177e4 LT |
1193 | #endif |
1194 | ||
bd4c625c | 1195 | rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1196 | |
bd4c625c | 1197 | if (!reiserfs_parse_options |
00b44197 JK |
1198 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
1199 | qf_names, &qfmt)) { | |
1da177e4 | 1200 | #ifdef CONFIG_QUOTA |
00b44197 JK |
1201 | for (i = 0; i < MAXQUOTAS; i++) |
1202 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1203 | kfree(qf_names[i]); | |
1da177e4 | 1204 | #endif |
cdf6ccc8 MS |
1205 | err = -EINVAL; |
1206 | goto out_err; | |
bd4c625c | 1207 | } |
00b44197 JK |
1208 | #ifdef CONFIG_QUOTA |
1209 | handle_quota_files(s, qf_names, &qfmt); | |
1210 | #endif | |
bd4c625c LT |
1211 | |
1212 | handle_attrs(s); | |
1213 | ||
1214 | /* Add options that are safe here */ | |
1215 | safe_mask |= 1 << REISERFS_SMALLTAIL; | |
1216 | safe_mask |= 1 << REISERFS_LARGETAIL; | |
1217 | safe_mask |= 1 << REISERFS_NO_BORDER; | |
1218 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; | |
1219 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; | |
1220 | safe_mask |= 1 << REISERFS_TEST4; | |
1221 | safe_mask |= 1 << REISERFS_ATTRS; | |
1222 | safe_mask |= 1 << REISERFS_XATTRS_USER; | |
1223 | safe_mask |= 1 << REISERFS_POSIXACL; | |
1224 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; | |
1225 | safe_mask |= 1 << REISERFS_BARRIER_NONE; | |
1226 | safe_mask |= 1 << REISERFS_ERROR_RO; | |
1227 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; | |
1228 | safe_mask |= 1 << REISERFS_ERROR_PANIC; | |
1229 | safe_mask |= 1 << REISERFS_QUOTA; | |
1230 | ||
1231 | /* Update the bitmask, taking care to keep | |
1232 | * the bits we're not allowed to change here */ | |
1233 | REISERFS_SB(s)->s_mount_opt = | |
1234 | (REISERFS_SB(s)-> | |
1235 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); | |
1236 | ||
1237 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { | |
1238 | journal->j_max_commit_age = commit_max_age; | |
1239 | journal->j_max_trans_age = commit_max_age; | |
1240 | } else if (commit_max_age == 0) { | |
1241 | /* 0 means restore defaults. */ | |
1242 | journal->j_max_commit_age = journal->j_default_max_commit_age; | |
1243 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
1244 | } | |
1245 | ||
1246 | if (blocks) { | |
cdf6ccc8 MS |
1247 | err = reiserfs_resize(s, blocks); |
1248 | if (err != 0) | |
1249 | goto out_err; | |
bd4c625c LT |
1250 | } |
1251 | ||
1252 | if (*mount_flags & MS_RDONLY) { | |
1253 | reiserfs_xattr_init(s, *mount_flags); | |
1254 | /* remount read-only */ | |
1255 | if (s->s_flags & MS_RDONLY) | |
1256 | /* it is read-only already */ | |
cdf6ccc8 | 1257 | goto out_ok; |
c79d967d | 1258 | |
0f0dd62f CH |
1259 | err = dquot_suspend(s, -1); |
1260 | if (err < 0) | |
c79d967d | 1261 | goto out_err; |
c79d967d | 1262 | |
bd4c625c LT |
1263 | /* try to remount file system with read-only permissions */ |
1264 | if (sb_umount_state(rs) == REISERFS_VALID_FS | |
1265 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { | |
cdf6ccc8 | 1266 | goto out_ok; |
bd4c625c LT |
1267 | } |
1268 | ||
1269 | err = journal_begin(&th, s, 10); | |
1270 | if (err) | |
cdf6ccc8 | 1271 | goto out_err; |
bd4c625c LT |
1272 | |
1273 | /* Mounting a rw partition read-only. */ | |
1274 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1275 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); | |
1276 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1277 | } else { | |
1278 | /* remount read-write */ | |
1279 | if (!(s->s_flags & MS_RDONLY)) { | |
1280 | reiserfs_xattr_init(s, *mount_flags); | |
cdf6ccc8 | 1281 | goto out_ok; /* We are read-write already */ |
bd4c625c LT |
1282 | } |
1283 | ||
cdf6ccc8 MS |
1284 | if (reiserfs_is_journal_aborted(journal)) { |
1285 | err = journal->j_errno; | |
1286 | goto out_err; | |
1287 | } | |
bd4c625c LT |
1288 | |
1289 | handle_data_mode(s, mount_options); | |
1290 | handle_barrier_mode(s, mount_options); | |
1291 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1292 | s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ | |
1293 | err = journal_begin(&th, s, 10); | |
1294 | if (err) | |
cdf6ccc8 | 1295 | goto out_err; |
bd4c625c LT |
1296 | |
1297 | /* Mount a partition which is read-only, read-write */ | |
1298 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1299 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1300 | s->s_flags &= ~MS_RDONLY; | |
1301 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
702d21c6 JM |
1302 | if (!old_format_only(s)) |
1303 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
bd4c625c LT |
1304 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
1305 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1306 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; | |
1307 | } | |
1308 | /* this will force a full flush of all journal lists */ | |
1309 | SB_JOURNAL(s)->j_must_wait = 1; | |
1310 | err = journal_end(&th, s, 10); | |
1311 | if (err) | |
cdf6ccc8 | 1312 | goto out_err; |
bd4c625c LT |
1313 | s->s_dirt = 0; |
1314 | ||
1315 | if (!(*mount_flags & MS_RDONLY)) { | |
0f0dd62f | 1316 | dquot_resume(s, -1); |
bd4c625c LT |
1317 | finish_unfinished(s); |
1318 | reiserfs_xattr_init(s, *mount_flags); | |
1319 | } | |
1320 | ||
cdf6ccc8 | 1321 | out_ok: |
2a32cebd | 1322 | replace_mount_options(s, new_opts); |
8ebc4232 | 1323 | reiserfs_write_unlock(s); |
bd4c625c | 1324 | return 0; |
cdf6ccc8 MS |
1325 | |
1326 | out_err: | |
1327 | kfree(new_opts); | |
8ebc4232 | 1328 | reiserfs_write_unlock(s); |
cdf6ccc8 | 1329 | return err; |
1da177e4 LT |
1330 | } |
1331 | ||
bd4c625c | 1332 | static int read_super_block(struct super_block *s, int offset) |
1da177e4 | 1333 | { |
bd4c625c LT |
1334 | struct buffer_head *bh; |
1335 | struct reiserfs_super_block *rs; | |
1336 | int fs_blocksize; | |
1da177e4 | 1337 | |
bd4c625c LT |
1338 | bh = sb_bread(s, offset / s->s_blocksize); |
1339 | if (!bh) { | |
45b03d5e | 1340 | reiserfs_warning(s, "sh-2006", |
bd4c625c LT |
1341 | "bread failed (dev %s, block %lu, size %lu)", |
1342 | reiserfs_bdevname(s), offset / s->s_blocksize, | |
1343 | s->s_blocksize); | |
1344 | return 1; | |
1345 | } | |
1da177e4 | 1346 | |
bd4c625c LT |
1347 | rs = (struct reiserfs_super_block *)bh->b_data; |
1348 | if (!is_any_reiserfs_magic_string(rs)) { | |
1349 | brelse(bh); | |
1350 | return 1; | |
1351 | } | |
1352 | // | |
1353 | // ok, reiserfs signature (old or new) found in at the given offset | |
0222e657 | 1354 | // |
bd4c625c LT |
1355 | fs_blocksize = sb_blocksize(rs); |
1356 | brelse(bh); | |
1357 | sb_set_blocksize(s, fs_blocksize); | |
1da177e4 | 1358 | |
bd4c625c LT |
1359 | bh = sb_bread(s, offset / s->s_blocksize); |
1360 | if (!bh) { | |
45b03d5e JM |
1361 | reiserfs_warning(s, "sh-2007", |
1362 | "bread failed (dev %s, block %lu, size %lu)", | |
bd4c625c LT |
1363 | reiserfs_bdevname(s), offset / s->s_blocksize, |
1364 | s->s_blocksize); | |
1365 | return 1; | |
1366 | } | |
1da177e4 | 1367 | |
bd4c625c LT |
1368 | rs = (struct reiserfs_super_block *)bh->b_data; |
1369 | if (sb_blocksize(rs) != s->s_blocksize) { | |
45b03d5e JM |
1370 | reiserfs_warning(s, "sh-2011", "can't find a reiserfs " |
1371 | "filesystem on (dev %s, block %Lu, size %lu)", | |
bd4c625c LT |
1372 | reiserfs_bdevname(s), |
1373 | (unsigned long long)bh->b_blocknr, | |
1374 | s->s_blocksize); | |
1375 | brelse(bh); | |
1376 | return 1; | |
1377 | } | |
1da177e4 | 1378 | |
bd4c625c LT |
1379 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
1380 | brelse(bh); | |
45b03d5e JM |
1381 | reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " |
1382 | "--rebuild-tree run detected. Please run\n" | |
1383 | "reiserfsck --rebuild-tree and wait for a " | |
1384 | "completion. If that fails\n" | |
bd4c625c LT |
1385 | "get newer reiserfsprogs package"); |
1386 | return 1; | |
1da177e4 | 1387 | } |
1da177e4 | 1388 | |
bd4c625c LT |
1389 | SB_BUFFER_WITH_SB(s) = bh; |
1390 | SB_DISK_SUPER_BLOCK(s) = rs; | |
1391 | ||
1392 | if (is_reiserfs_jr(rs)) { | |
1393 | /* magic is of non-standard journal filesystem, look at s_version to | |
1394 | find which format is in use */ | |
1395 | if (sb_version(rs) == REISERFS_VERSION_2) | |
1d889d99 JM |
1396 | reiserfs_info(s, "found reiserfs format \"3.6\"" |
1397 | " with non-standard journal\n"); | |
bd4c625c | 1398 | else if (sb_version(rs) == REISERFS_VERSION_1) |
1d889d99 JM |
1399 | reiserfs_info(s, "found reiserfs format \"3.5\"" |
1400 | " with non-standard journal\n"); | |
bd4c625c | 1401 | else { |
45b03d5e JM |
1402 | reiserfs_warning(s, "sh-2012", "found unknown " |
1403 | "format \"%u\" of reiserfs with " | |
1404 | "non-standard magic", sb_version(rs)); | |
bd4c625c LT |
1405 | return 1; |
1406 | } | |
1407 | } else | |
1408 | /* s_version of standard format may contain incorrect information, | |
1409 | so we just look at the magic string */ | |
1410 | reiserfs_info(s, | |
1411 | "found reiserfs format \"%s\" with standard journal\n", | |
1412 | is_reiserfs_3_5(rs) ? "3.5" : "3.6"); | |
1413 | ||
1414 | s->s_op = &reiserfs_sops; | |
1415 | s->s_export_op = &reiserfs_export_ops; | |
1da177e4 | 1416 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
1417 | s->s_qcop = &reiserfs_qctl_operations; |
1418 | s->dq_op = &reiserfs_quota_operations; | |
1da177e4 LT |
1419 | #endif |
1420 | ||
bd4c625c LT |
1421 | /* new format is limited by the 32 bit wide i_blocks field, want to |
1422 | ** be one full block below that. | |
1423 | */ | |
1424 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; | |
1425 | return 0; | |
1da177e4 LT |
1426 | } |
1427 | ||
1da177e4 | 1428 | /* after journal replay, reread all bitmap and super blocks */ |
bd4c625c LT |
1429 | static int reread_meta_blocks(struct super_block *s) |
1430 | { | |
bd4c625c | 1431 | ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))); |
8ebc4232 | 1432 | reiserfs_write_unlock(s); |
bd4c625c | 1433 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); |
8ebc4232 | 1434 | reiserfs_write_lock(s); |
bd4c625c | 1435 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { |
45b03d5e | 1436 | reiserfs_warning(s, "reiserfs-2504", "error reading the super"); |
bd4c625c LT |
1437 | return 1; |
1438 | } | |
1da177e4 | 1439 | |
bd4c625c | 1440 | return 0; |
bd4c625c | 1441 | } |
1da177e4 LT |
1442 | |
1443 | ///////////////////////////////////////////////////// | |
1444 | // hash detection stuff | |
1445 | ||
1da177e4 LT |
1446 | // if root directory is empty - we set default - Yura's - hash and |
1447 | // warn about it | |
1448 | // FIXME: we look for only one name in a directory. If tea and yura | |
1449 | // bith have the same value - we ask user to send report to the | |
1450 | // mailing list | |
bd4c625c | 1451 | static __u32 find_hash_out(struct super_block *s) |
1da177e4 | 1452 | { |
bd4c625c LT |
1453 | int retval; |
1454 | struct inode *inode; | |
1455 | struct cpu_key key; | |
1456 | INITIALIZE_PATH(path); | |
1457 | struct reiserfs_dir_entry de; | |
1458 | __u32 hash = DEFAULT_HASH; | |
1459 | ||
1460 | inode = s->s_root->d_inode; | |
1461 | ||
1462 | do { // Some serious "goto"-hater was there ;) | |
1463 | u32 teahash, r5hash, yurahash; | |
1464 | ||
1465 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); | |
1466 | retval = search_by_entry_key(s, &key, &path, &de); | |
1467 | if (retval == IO_ERROR) { | |
1468 | pathrelse(&path); | |
1469 | return UNSET_HASH; | |
1470 | } | |
1471 | if (retval == NAME_NOT_FOUND) | |
1472 | de.de_entry_num--; | |
1473 | set_de_name_and_namelen(&de); | |
1474 | if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) { | |
1475 | /* allow override in this case */ | |
1476 | if (reiserfs_rupasov_hash(s)) { | |
1477 | hash = YURA_HASH; | |
1478 | } | |
1d889d99 JM |
1479 | reiserfs_info(s, "FS seems to be empty, autodetect " |
1480 | "is using the default hash\n"); | |
bd4c625c LT |
1481 | break; |
1482 | } | |
1483 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); | |
1484 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); | |
1485 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); | |
1486 | if (((teahash == r5hash) | |
1487 | && | |
1488 | (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) | |
1489 | == r5hash)) || ((teahash == yurahash) | |
1490 | && (yurahash == | |
1491 | GET_HASH_VALUE(deh_offset | |
1492 | (& | |
1493 | (de. | |
1494 | de_deh[de. | |
1495 | de_entry_num]))))) | |
1496 | || ((r5hash == yurahash) | |
1497 | && (yurahash == | |
1498 | GET_HASH_VALUE(deh_offset | |
1499 | (&(de.de_deh[de.de_entry_num])))))) { | |
45b03d5e JM |
1500 | reiserfs_warning(s, "reiserfs-2506", "Unable to " |
1501 | "automatically detect hash function. " | |
1502 | "Please mount with -o " | |
1503 | "hash={tea,rupasov,r5}"); | |
bd4c625c LT |
1504 | hash = UNSET_HASH; |
1505 | break; | |
1506 | } | |
1507 | if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) == | |
1508 | yurahash) | |
1509 | hash = YURA_HASH; | |
1510 | else if (GET_HASH_VALUE | |
1511 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) | |
1512 | hash = TEA_HASH; | |
1513 | else if (GET_HASH_VALUE | |
1514 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) | |
1515 | hash = R5_HASH; | |
1516 | else { | |
45b03d5e JM |
1517 | reiserfs_warning(s, "reiserfs-2506", |
1518 | "Unrecognised hash function"); | |
bd4c625c LT |
1519 | hash = UNSET_HASH; |
1520 | } | |
1521 | } while (0); | |
1522 | ||
1523 | pathrelse(&path); | |
1524 | return hash; | |
1da177e4 LT |
1525 | } |
1526 | ||
1527 | // finds out which hash names are sorted with | |
bd4c625c | 1528 | static int what_hash(struct super_block *s) |
1da177e4 | 1529 | { |
bd4c625c LT |
1530 | __u32 code; |
1531 | ||
1532 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); | |
1533 | ||
1534 | /* reiserfs_hash_detect() == true if any of the hash mount options | |
1535 | ** were used. We must check them to make sure the user isn't | |
1536 | ** using a bad hash value | |
1537 | */ | |
1538 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) | |
1539 | code = find_hash_out(s); | |
1540 | ||
1541 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { | |
0222e657 JM |
1542 | /* detection has found the hash, and we must check against the |
1543 | ** mount options | |
bd4c625c LT |
1544 | */ |
1545 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { | |
45b03d5e JM |
1546 | reiserfs_warning(s, "reiserfs-2507", |
1547 | "Error, %s hash detected, " | |
bd4c625c LT |
1548 | "unable to force rupasov hash", |
1549 | reiserfs_hashname(code)); | |
1550 | code = UNSET_HASH; | |
1551 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { | |
45b03d5e JM |
1552 | reiserfs_warning(s, "reiserfs-2508", |
1553 | "Error, %s hash detected, " | |
bd4c625c LT |
1554 | "unable to force tea hash", |
1555 | reiserfs_hashname(code)); | |
1556 | code = UNSET_HASH; | |
1557 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { | |
45b03d5e JM |
1558 | reiserfs_warning(s, "reiserfs-2509", |
1559 | "Error, %s hash detected, " | |
bd4c625c LT |
1560 | "unable to force r5 hash", |
1561 | reiserfs_hashname(code)); | |
1562 | code = UNSET_HASH; | |
1563 | } | |
1564 | } else { | |
1565 | /* find_hash_out was not called or could not determine the hash */ | |
1566 | if (reiserfs_rupasov_hash(s)) { | |
1567 | code = YURA_HASH; | |
1568 | } else if (reiserfs_tea_hash(s)) { | |
1569 | code = TEA_HASH; | |
1570 | } else if (reiserfs_r5_hash(s)) { | |
1571 | code = R5_HASH; | |
1572 | } | |
1573 | } | |
1574 | ||
0222e657 | 1575 | /* if we are mounted RW, and we have a new valid hash code, update |
bd4c625c LT |
1576 | ** the super |
1577 | */ | |
1578 | if (code != UNSET_HASH && | |
1579 | !(s->s_flags & MS_RDONLY) && | |
1580 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { | |
1581 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); | |
1582 | } | |
1583 | return code; | |
1da177e4 LT |
1584 | } |
1585 | ||
1586 | // return pointer to appropriate function | |
bd4c625c | 1587 | static hashf_t hash_function(struct super_block *s) |
1da177e4 | 1588 | { |
bd4c625c LT |
1589 | switch (what_hash(s)) { |
1590 | case TEA_HASH: | |
1591 | reiserfs_info(s, "Using tea hash to sort names\n"); | |
1592 | return keyed_hash; | |
1593 | case YURA_HASH: | |
1594 | reiserfs_info(s, "Using rupasov hash to sort names\n"); | |
1595 | return yura_hash; | |
1596 | case R5_HASH: | |
1597 | reiserfs_info(s, "Using r5 hash to sort names\n"); | |
1598 | return r5_hash; | |
1599 | } | |
1600 | return NULL; | |
1da177e4 LT |
1601 | } |
1602 | ||
1603 | // this is used to set up correct value for old partitions | |
bd4c625c | 1604 | static int function2code(hashf_t func) |
1da177e4 | 1605 | { |
bd4c625c LT |
1606 | if (func == keyed_hash) |
1607 | return TEA_HASH; | |
1608 | if (func == yura_hash) | |
1609 | return YURA_HASH; | |
1610 | if (func == r5_hash) | |
1611 | return R5_HASH; | |
1da177e4 | 1612 | |
bd4c625c | 1613 | BUG(); // should never happen |
1da177e4 | 1614 | |
bd4c625c | 1615 | return 0; |
1da177e4 LT |
1616 | } |
1617 | ||
45b03d5e | 1618 | #define SWARN(silent, s, id, ...) \ |
1da177e4 | 1619 | if (!(silent)) \ |
45b03d5e | 1620 | reiserfs_warning(s, id, __VA_ARGS__) |
1da177e4 | 1621 | |
bd4c625c | 1622 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1da177e4 | 1623 | { |
bd4c625c | 1624 | struct inode *root_inode; |
bd4c625c LT |
1625 | struct reiserfs_transaction_handle th; |
1626 | int old_format = 0; | |
1627 | unsigned long blocks; | |
1628 | unsigned int commit_max_age = 0; | |
1629 | int jinit_done = 0; | |
1630 | struct reiserfs_iget_args args; | |
1631 | struct reiserfs_super_block *rs; | |
1632 | char *jdev_name; | |
1633 | struct reiserfs_sb_info *sbi; | |
1634 | int errval = -EINVAL; | |
00b44197 JK |
1635 | char *qf_names[MAXQUOTAS] = {}; |
1636 | unsigned int qfmt = 0; | |
bd4c625c | 1637 | |
cdf6ccc8 MS |
1638 | save_mount_options(s, data); |
1639 | ||
01afb213 | 1640 | sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
b7b7fa43 JM |
1641 | if (!sbi) |
1642 | return -ENOMEM; | |
bd4c625c | 1643 | s->s_fs_info = sbi; |
bd4c625c LT |
1644 | /* Set default values for options: non-aggressive tails, RO on errors */ |
1645 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); | |
1646 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); | |
b4d5b10f | 1647 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); |
bd4c625c LT |
1648 | /* no preallocation minimum, be smart in |
1649 | reiserfs_file_write instead */ | |
1650 | REISERFS_SB(s)->s_alloc_options.preallocmin = 0; | |
1651 | /* Preallocate by 16 blocks (17-1) at once */ | |
1652 | REISERFS_SB(s)->s_alloc_options.preallocsize = 17; | |
bd4c625c LT |
1653 | /* setup default block allocator options */ |
1654 | reiserfs_init_alloc_options(s); | |
1655 | ||
8ebc4232 FW |
1656 | mutex_init(&REISERFS_SB(s)->lock); |
1657 | REISERFS_SB(s)->lock_depth = -1; | |
1658 | ||
1659 | /* | |
1660 | * This function is called with the bkl, which also was the old | |
1661 | * locking used here. | |
1662 | * do_journal_begin() will soon check if we hold the lock (ie: was the | |
1663 | * bkl). This is likely because do_journal_begin() has several another | |
1664 | * callers because at this time, it doesn't seem to be necessary to | |
1665 | * protect against anything. | |
1666 | * Anyway, let's be conservative and lock for now. | |
1667 | */ | |
1668 | reiserfs_write_lock(s); | |
1669 | ||
bd4c625c LT |
1670 | jdev_name = NULL; |
1671 | if (reiserfs_parse_options | |
1672 | (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name, | |
00b44197 | 1673 | &commit_max_age, qf_names, &qfmt) == 0) { |
bd4c625c LT |
1674 | goto error; |
1675 | } | |
00b44197 JK |
1676 | #ifdef CONFIG_QUOTA |
1677 | handle_quota_files(s, qf_names, &qfmt); | |
1678 | #endif | |
bd4c625c LT |
1679 | |
1680 | if (blocks) { | |
45b03d5e | 1681 | SWARN(silent, s, "jmacd-7", "resize option for remount only"); |
bd4c625c LT |
1682 | goto error; |
1683 | } | |
1684 | ||
1685 | /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ | |
1686 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) | |
1687 | old_format = 1; | |
1688 | /* try new format (64-th 1k block), which can contain reiserfs super block */ | |
1689 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { | |
45b03d5e | 1690 | SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", |
bd4c625c LT |
1691 | reiserfs_bdevname(s)); |
1692 | goto error; | |
1693 | } | |
1694 | ||
1695 | rs = SB_DISK_SUPER_BLOCK(s); | |
1696 | /* Let's do basic sanity check to verify that underlying device is not | |
1697 | smaller than the filesystem. If the check fails then abort and scream, | |
1698 | because bad stuff will happen otherwise. */ | |
1699 | if (s->s_bdev && s->s_bdev->bd_inode | |
1700 | && i_size_read(s->s_bdev->bd_inode) < | |
1701 | sb_block_count(rs) * sb_blocksize(rs)) { | |
45b03d5e JM |
1702 | SWARN(silent, s, "", "Filesystem cannot be " |
1703 | "mounted because it is bigger than the device"); | |
1704 | SWARN(silent, s, "", "You may need to run fsck " | |
1705 | "or increase size of your LVM partition"); | |
1706 | SWARN(silent, s, "", "Or may be you forgot to " | |
1707 | "reboot after fdisk when it told you to"); | |
bd4c625c LT |
1708 | goto error; |
1709 | } | |
1710 | ||
1711 | sbi->s_mount_state = SB_REISERFS_STATE(s); | |
1712 | sbi->s_mount_state = REISERFS_VALID_FS; | |
1713 | ||
6f01046b | 1714 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
45b03d5e | 1715 | SWARN(silent, s, "jmacd-8", "unable to read bitmap"); |
bd4c625c LT |
1716 | goto error; |
1717 | } | |
d2c89a42 | 1718 | errval = -EINVAL; |
1da177e4 | 1719 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1720 | SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); |
1721 | SWARN(silent, s, "", "- it is slow mode for debugging."); | |
1da177e4 LT |
1722 | #endif |
1723 | ||
bd4c625c LT |
1724 | /* make data=ordered the default */ |
1725 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && | |
1726 | !reiserfs_data_writeback(s)) { | |
1727 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); | |
1728 | } | |
1729 | ||
1730 | if (reiserfs_data_log(s)) { | |
1731 | reiserfs_info(s, "using journaled data mode\n"); | |
1732 | } else if (reiserfs_data_ordered(s)) { | |
1733 | reiserfs_info(s, "using ordered data mode\n"); | |
1734 | } else { | |
1735 | reiserfs_info(s, "using writeback data mode\n"); | |
1736 | } | |
1737 | if (reiserfs_barrier_flush(s)) { | |
1738 | printk("reiserfs: using flush barriers\n"); | |
1739 | } | |
1740 | // set_device_ro(s->s_dev, 1) ; | |
1741 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { | |
45b03d5e JM |
1742 | SWARN(silent, s, "sh-2022", |
1743 | "unable to initialize journal space"); | |
bd4c625c LT |
1744 | goto error; |
1745 | } else { | |
1746 | jinit_done = 1; /* once this is set, journal_release must be called | |
1747 | ** if we error out of the mount | |
1748 | */ | |
1749 | } | |
1750 | if (reread_meta_blocks(s)) { | |
45b03d5e JM |
1751 | SWARN(silent, s, "jmacd-9", |
1752 | "unable to reread meta blocks after journal init"); | |
bd4c625c LT |
1753 | goto error; |
1754 | } | |
1755 | ||
1756 | if (replay_only(s)) | |
1757 | goto error; | |
1758 | ||
1759 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { | |
45b03d5e JM |
1760 | SWARN(silent, s, "clm-7000", |
1761 | "Detected readonly device, marking FS readonly"); | |
bd4c625c LT |
1762 | s->s_flags |= MS_RDONLY; |
1763 | } | |
1764 | args.objectid = REISERFS_ROOT_OBJECTID; | |
1765 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; | |
1766 | root_inode = | |
1767 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, | |
1768 | reiserfs_init_locked_inode, (void *)(&args)); | |
1769 | if (!root_inode) { | |
45b03d5e | 1770 | SWARN(silent, s, "jmacd-10", "get root inode failed"); |
bd4c625c LT |
1771 | goto error; |
1772 | } | |
1773 | ||
1774 | if (root_inode->i_state & I_NEW) { | |
1775 | reiserfs_read_locked_inode(root_inode, &args); | |
1776 | unlock_new_inode(root_inode); | |
1777 | } | |
1778 | ||
1779 | s->s_root = d_alloc_root(root_inode); | |
1780 | if (!s->s_root) { | |
1781 | iput(root_inode); | |
1782 | goto error; | |
1783 | } | |
1784 | // define and initialize hash function | |
1785 | sbi->s_hash_function = hash_function(s); | |
1786 | if (sbi->s_hash_function == NULL) { | |
1787 | dput(s->s_root); | |
1788 | s->s_root = NULL; | |
1789 | goto error; | |
1790 | } | |
1791 | ||
1792 | if (is_reiserfs_3_5(rs) | |
1793 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) | |
1794 | set_bit(REISERFS_3_5, &(sbi->s_properties)); | |
e1fabd3c JM |
1795 | else if (old_format) |
1796 | set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties)); | |
bd4c625c LT |
1797 | else |
1798 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1799 | ||
1800 | if (!(s->s_flags & MS_RDONLY)) { | |
1801 | ||
1802 | errval = journal_begin(&th, s, 1); | |
1803 | if (errval) { | |
1804 | dput(s->s_root); | |
1805 | s->s_root = NULL; | |
1806 | goto error; | |
1807 | } | |
1808 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1809 | ||
1810 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
1811 | set_sb_fs_state(rs, 0); | |
1812 | ||
cb680c1b JM |
1813 | /* Clear out s_bmap_nr if it would wrap. We can handle this |
1814 | * case, but older revisions can't. This will cause the | |
1815 | * file system to fail mount on those older implementations, | |
1816 | * avoiding corruption. -jeffm */ | |
1817 | if (bmap_would_wrap(reiserfs_bmap_count(s)) && | |
1818 | sb_bmap_nr(rs) != 0) { | |
45b03d5e | 1819 | reiserfs_warning(s, "super-2030", "This file system " |
cb680c1b JM |
1820 | "claims to use %u bitmap blocks in " |
1821 | "its super block, but requires %u. " | |
1822 | "Clearing to zero.", sb_bmap_nr(rs), | |
1823 | reiserfs_bmap_count(s)); | |
1824 | ||
1825 | set_sb_bmap_nr(rs, 0); | |
1826 | } | |
1827 | ||
bd4c625c LT |
1828 | if (old_format_only(s)) { |
1829 | /* filesystem of format 3.5 either with standard or non-standard | |
1830 | journal */ | |
1831 | if (convert_reiserfs(s)) { | |
1832 | /* and -o conv is given */ | |
1833 | if (!silent) | |
1834 | reiserfs_info(s, | |
1835 | "converting 3.5 filesystem to the 3.6 format"); | |
1836 | ||
1837 | if (is_reiserfs_3_5(rs)) | |
1838 | /* put magic string of 3.6 format. 2.2 will not be able to | |
1839 | mount this filesystem anymore */ | |
1840 | memcpy(rs->s_v1.s_magic, | |
1841 | reiserfs_3_6_magic_string, | |
1842 | sizeof | |
1843 | (reiserfs_3_6_magic_string)); | |
1844 | ||
1845 | set_sb_version(rs, REISERFS_VERSION_2); | |
1846 | reiserfs_convert_objectid_map_v1(s); | |
1847 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1848 | clear_bit(REISERFS_3_5, &(sbi->s_properties)); | |
1849 | } else if (!silent) { | |
1850 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
1851 | } | |
702d21c6 JM |
1852 | } else |
1853 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
1854 | ||
bd4c625c LT |
1855 | |
1856 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1857 | errval = journal_end(&th, s, 1); | |
1858 | if (errval) { | |
1859 | dput(s->s_root); | |
1860 | s->s_root = NULL; | |
1861 | goto error; | |
1862 | } | |
1863 | ||
edcc37a0 AV |
1864 | if ((errval = reiserfs_lookup_privroot(s)) || |
1865 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
1866 | dput(s->s_root); |
1867 | s->s_root = NULL; | |
1868 | goto error; | |
1869 | } | |
1870 | ||
1871 | /* look for files which were to be removed in previous session */ | |
1872 | finish_unfinished(s); | |
1873 | } else { | |
1874 | if (old_format_only(s) && !silent) { | |
1875 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
1876 | } | |
1877 | ||
edcc37a0 AV |
1878 | if ((errval = reiserfs_lookup_privroot(s)) || |
1879 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
1880 | dput(s->s_root); |
1881 | s->s_root = NULL; | |
1882 | goto error; | |
1883 | } | |
1884 | } | |
1885 | // mark hash in super block: it could be unset. overwrite should be ok | |
1886 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); | |
1887 | ||
1888 | handle_attrs(s); | |
1889 | ||
1890 | reiserfs_proc_info_init(s); | |
1891 | ||
1892 | init_waitqueue_head(&(sbi->s_wait)); | |
1893 | spin_lock_init(&sbi->bitmap_lock); | |
1894 | ||
8ebc4232 FW |
1895 | reiserfs_write_unlock(s); |
1896 | ||
bd4c625c LT |
1897 | return (0); |
1898 | ||
00b44197 | 1899 | error: |
bd4c625c LT |
1900 | if (jinit_done) { /* kill the commit thread, free journal ram */ |
1901 | journal_release_error(NULL, s); | |
1902 | } | |
5065227b | 1903 | |
b7b7fa43 JM |
1904 | reiserfs_write_unlock(s); |
1905 | ||
5065227b | 1906 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
1907 | if (SB_BUFFER_WITH_SB(s)) |
1908 | brelse(SB_BUFFER_WITH_SB(s)); | |
1da177e4 | 1909 | #ifdef CONFIG_QUOTA |
5065227b JM |
1910 | { |
1911 | int j; | |
00b44197 JK |
1912 | for (j = 0; j < MAXQUOTAS; j++) |
1913 | kfree(qf_names[j]); | |
bd4c625c | 1914 | } |
1da177e4 | 1915 | #endif |
833d304b | 1916 | kfree(sbi); |
1da177e4 | 1917 | |
bd4c625c LT |
1918 | s->s_fs_info = NULL; |
1919 | return errval; | |
1da177e4 LT |
1920 | } |
1921 | ||
726c3342 | 1922 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1923 | { |
726c3342 | 1924 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
bd4c625c LT |
1925 | |
1926 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); | |
1927 | buf->f_bfree = sb_free_blocks(rs); | |
1928 | buf->f_bavail = buf->f_bfree; | |
1929 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; | |
726c3342 | 1930 | buf->f_bsize = dentry->d_sb->s_blocksize; |
bd4c625c LT |
1931 | /* changed to accommodate gcc folks. */ |
1932 | buf->f_type = REISERFS_SUPER_MAGIC; | |
651d0623 CL |
1933 | buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); |
1934 | buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, | |
1935 | sizeof(rs->s_uuid)/2); | |
1936 | ||
bd4c625c | 1937 | return 0; |
1da177e4 LT |
1938 | } |
1939 | ||
1940 | #ifdef CONFIG_QUOTA | |
1da177e4 LT |
1941 | static int reiserfs_write_dquot(struct dquot *dquot) |
1942 | { | |
bd4c625c LT |
1943 | struct reiserfs_transaction_handle th; |
1944 | int ret, err; | |
1945 | ||
1946 | reiserfs_write_lock(dquot->dq_sb); | |
1947 | ret = | |
1948 | journal_begin(&th, dquot->dq_sb, | |
1949 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
1950 | if (ret) | |
1951 | goto out; | |
1952 | ret = dquot_commit(dquot); | |
1953 | err = | |
1954 | journal_end(&th, dquot->dq_sb, | |
1955 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
1956 | if (!ret && err) | |
1957 | ret = err; | |
1958 | out: | |
1959 | reiserfs_write_unlock(dquot->dq_sb); | |
1960 | return ret; | |
1da177e4 LT |
1961 | } |
1962 | ||
1963 | static int reiserfs_acquire_dquot(struct dquot *dquot) | |
1964 | { | |
bd4c625c LT |
1965 | struct reiserfs_transaction_handle th; |
1966 | int ret, err; | |
1967 | ||
1968 | reiserfs_write_lock(dquot->dq_sb); | |
1969 | ret = | |
1970 | journal_begin(&th, dquot->dq_sb, | |
1971 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
1972 | if (ret) | |
1973 | goto out; | |
1974 | ret = dquot_acquire(dquot); | |
1975 | err = | |
1976 | journal_end(&th, dquot->dq_sb, | |
1977 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
1978 | if (!ret && err) | |
1979 | ret = err; | |
1980 | out: | |
1981 | reiserfs_write_unlock(dquot->dq_sb); | |
1982 | return ret; | |
1da177e4 LT |
1983 | } |
1984 | ||
1985 | static int reiserfs_release_dquot(struct dquot *dquot) | |
1986 | { | |
bd4c625c LT |
1987 | struct reiserfs_transaction_handle th; |
1988 | int ret, err; | |
1989 | ||
1990 | reiserfs_write_lock(dquot->dq_sb); | |
1991 | ret = | |
1992 | journal_begin(&th, dquot->dq_sb, | |
1993 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
1994 | if (ret) { |
1995 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
1996 | dquot_release(dquot); | |
bd4c625c | 1997 | goto out; |
9c3013e9 | 1998 | } |
bd4c625c LT |
1999 | ret = dquot_release(dquot); |
2000 | err = | |
2001 | journal_end(&th, dquot->dq_sb, | |
2002 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
2003 | if (!ret && err) | |
2004 | ret = err; | |
2005 | out: | |
2006 | reiserfs_write_unlock(dquot->dq_sb); | |
2007 | return ret; | |
1da177e4 LT |
2008 | } |
2009 | ||
2010 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) | |
2011 | { | |
4506567b | 2012 | /* Are we journaling quotas? */ |
bd4c625c LT |
2013 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2014 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2015 | dquot_mark_dquot_dirty(dquot); | |
2016 | return reiserfs_write_dquot(dquot); | |
2017 | } else | |
2018 | return dquot_mark_dquot_dirty(dquot); | |
1da177e4 LT |
2019 | } |
2020 | ||
2021 | static int reiserfs_write_info(struct super_block *sb, int type) | |
2022 | { | |
bd4c625c LT |
2023 | struct reiserfs_transaction_handle th; |
2024 | int ret, err; | |
2025 | ||
2026 | /* Data block + inode block */ | |
2027 | reiserfs_write_lock(sb); | |
2028 | ret = journal_begin(&th, sb, 2); | |
2029 | if (ret) | |
2030 | goto out; | |
2031 | ret = dquot_commit_info(sb, type); | |
2032 | err = journal_end(&th, sb, 2); | |
2033 | if (!ret && err) | |
2034 | ret = err; | |
2035 | out: | |
2036 | reiserfs_write_unlock(sb); | |
2037 | return ret; | |
1da177e4 LT |
2038 | } |
2039 | ||
2040 | /* | |
84de856e | 2041 | * Turn on quotas during mount time - we need to find the quota file and such... |
1da177e4 LT |
2042 | */ |
2043 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) | |
2044 | { | |
287a8095 CH |
2045 | return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
2046 | REISERFS_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2047 | } |
2048 | ||
2049 | /* | |
2050 | * Standard function to be called on quota_on | |
2051 | */ | |
bd4c625c | 2052 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 2053 | struct path *path) |
1da177e4 | 2054 | { |
bd4c625c | 2055 | int err; |
d5dee5c3 | 2056 | struct inode *inode; |
5d4f7fdd | 2057 | struct reiserfs_transaction_handle th; |
bd4c625c LT |
2058 | |
2059 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA))) | |
2060 | return -EINVAL; | |
307ae18a | 2061 | |
bd4c625c | 2062 | /* Quotafile not on the same filesystem? */ |
f00c9e44 | 2063 | if (path->mnt->mnt_sb != sb) { |
77e69dac AV |
2064 | err = -EXDEV; |
2065 | goto out; | |
bd4c625c | 2066 | } |
f00c9e44 | 2067 | inode = path->dentry->d_inode; |
bd4c625c | 2068 | /* We must not pack tails for quota files on reiserfs for quota IO to work */ |
d5dee5c3 JK |
2069 | if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
2070 | err = reiserfs_unpack(inode, NULL); | |
2071 | if (err) { | |
45b03d5e JM |
2072 | reiserfs_warning(sb, "super-6520", |
2073 | "Unpacking tail of quota file failed" | |
d5dee5c3 | 2074 | " (%d). Cannot turn on quotas.", err); |
77e69dac AV |
2075 | err = -EINVAL; |
2076 | goto out; | |
d5dee5c3 JK |
2077 | } |
2078 | mark_inode_dirty(inode); | |
bd4c625c | 2079 | } |
5d4f7fdd JK |
2080 | /* Journaling quota? */ |
2081 | if (REISERFS_SB(sb)->s_qf_names[type]) { | |
2082 | /* Quotafile not of fs root? */ | |
f00c9e44 | 2083 | if (path->dentry->d_parent != sb->s_root) |
45b03d5e JM |
2084 | reiserfs_warning(sb, "super-6521", |
2085 | "Quota file not on filesystem root. " | |
bd4c625c | 2086 | "Journalled quota will not work."); |
5d4f7fdd JK |
2087 | } |
2088 | ||
2089 | /* | |
2090 | * When we journal data on quota file, we have to flush journal to see | |
2091 | * all updates to the file when we bypass pagecache... | |
2092 | */ | |
2093 | if (reiserfs_file_data_log(inode)) { | |
2094 | /* Just start temporary transaction and finish it */ | |
2095 | err = journal_begin(&th, sb, 1); | |
2096 | if (err) | |
77e69dac | 2097 | goto out; |
5d4f7fdd JK |
2098 | err = journal_end_sync(&th, sb, 1); |
2099 | if (err) | |
77e69dac | 2100 | goto out; |
5d4f7fdd | 2101 | } |
f00c9e44 | 2102 | err = dquot_quota_on(sb, type, format_id, path); |
77e69dac | 2103 | out: |
77e69dac | 2104 | return err; |
1da177e4 LT |
2105 | } |
2106 | ||
2107 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2108 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 2109 | * itself serializes the operations (and no one else should touch the files) |
1da177e4 LT |
2110 | * we don't have to be afraid of races */ |
2111 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, | |
2112 | size_t len, loff_t off) | |
2113 | { | |
bd4c625c LT |
2114 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2115 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2116 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2117 | size_t toread; | |
2118 | struct buffer_head tmp_bh, *bh; | |
2119 | loff_t i_size = i_size_read(inode); | |
2120 | ||
2121 | if (off > i_size) | |
2122 | return 0; | |
2123 | if (off + len > i_size) | |
2124 | len = i_size - off; | |
2125 | toread = len; | |
2126 | while (toread > 0) { | |
2127 | tocopy = | |
2128 | sb->s_blocksize - offset < | |
2129 | toread ? sb->s_blocksize - offset : toread; | |
2130 | tmp_bh.b_state = 0; | |
2131 | /* Quota files are without tails so we can safely use this function */ | |
2132 | reiserfs_write_lock(sb); | |
2133 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); | |
2134 | reiserfs_write_unlock(sb); | |
2135 | if (err) | |
2136 | return err; | |
2137 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
2138 | memset(data, 0, tocopy); | |
2139 | else { | |
2140 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2141 | if (!bh) | |
2142 | return -EIO; | |
2143 | memcpy(data, bh->b_data + offset, tocopy); | |
2144 | brelse(bh); | |
2145 | } | |
2146 | offset = 0; | |
2147 | toread -= tocopy; | |
2148 | data += tocopy; | |
2149 | blk++; | |
2150 | } | |
2151 | return len; | |
1da177e4 LT |
2152 | } |
2153 | ||
2154 | /* Write to quotafile (we know the transaction is already started and has | |
2155 | * enough credits) */ | |
2156 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, | |
2157 | const char *data, size_t len, loff_t off) | |
2158 | { | |
bd4c625c LT |
2159 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2160 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2161 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2162 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; | |
2163 | size_t towrite = len; | |
2164 | struct buffer_head tmp_bh, *bh; | |
2165 | ||
9c3013e9 JK |
2166 | if (!current->journal_info) { |
2167 | printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)" | |
2168 | " cancelled because transaction is not started.\n", | |
2169 | (unsigned long long)off, (unsigned long long)len); | |
2170 | return -EIO; | |
2171 | } | |
5c81a419 | 2172 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
bd4c625c LT |
2173 | while (towrite > 0) { |
2174 | tocopy = sb->s_blocksize - offset < towrite ? | |
2175 | sb->s_blocksize - offset : towrite; | |
2176 | tmp_bh.b_state = 0; | |
2177 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); | |
2178 | if (err) | |
2179 | goto out; | |
2180 | if (offset || tocopy != sb->s_blocksize) | |
2181 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2182 | else | |
2183 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
2184 | if (!bh) { | |
2185 | err = -EIO; | |
2186 | goto out; | |
2187 | } | |
2188 | lock_buffer(bh); | |
2189 | memcpy(bh->b_data + offset, data, tocopy); | |
2190 | flush_dcache_page(bh->b_page); | |
2191 | set_buffer_uptodate(bh); | |
2192 | unlock_buffer(bh); | |
2193 | reiserfs_prepare_for_journal(sb, bh, 1); | |
2194 | journal_mark_dirty(current->journal_info, sb, bh); | |
2195 | if (!journal_quota) | |
2196 | reiserfs_add_ordered_list(inode, bh); | |
2197 | brelse(bh); | |
2198 | offset = 0; | |
2199 | towrite -= tocopy; | |
2200 | data += tocopy; | |
2201 | blk++; | |
2202 | } | |
9c3013e9 | 2203 | out: |
10dd08dc JK |
2204 | if (len == towrite) { |
2205 | mutex_unlock(&inode->i_mutex); | |
bd4c625c | 2206 | return err; |
10dd08dc | 2207 | } |
bd4c625c LT |
2208 | if (inode->i_size < off + len - towrite) |
2209 | i_size_write(inode, off + len - towrite); | |
2210 | inode->i_version++; | |
2211 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2212 | mark_inode_dirty(inode); | |
1b1dcc1b | 2213 | mutex_unlock(&inode->i_mutex); |
bd4c625c | 2214 | return len - towrite; |
1da177e4 LT |
2215 | } |
2216 | ||
2217 | #endif | |
2218 | ||
152a0836 | 2219 | static struct dentry *get_super_block(struct file_system_type *fs_type, |
454e2398 | 2220 | int flags, const char *dev_name, |
152a0836 | 2221 | void *data) |
1da177e4 | 2222 | { |
152a0836 | 2223 | return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); |
1da177e4 LT |
2224 | } |
2225 | ||
bd4c625c | 2226 | static int __init init_reiserfs_fs(void) |
1da177e4 LT |
2227 | { |
2228 | int ret; | |
2229 | ||
bd4c625c | 2230 | if ((ret = init_inodecache())) { |
1da177e4 LT |
2231 | return ret; |
2232 | } | |
2233 | ||
bd4c625c | 2234 | reiserfs_proc_info_global_init(); |
1da177e4 | 2235 | |
bd4c625c | 2236 | ret = register_filesystem(&reiserfs_fs_type); |
1da177e4 LT |
2237 | |
2238 | if (ret == 0) { | |
2239 | return 0; | |
2240 | } | |
2241 | ||
bd4c625c LT |
2242 | reiserfs_proc_info_global_done(); |
2243 | destroy_inodecache(); | |
1da177e4 LT |
2244 | |
2245 | return ret; | |
2246 | } | |
2247 | ||
bd4c625c | 2248 | static void __exit exit_reiserfs_fs(void) |
1da177e4 | 2249 | { |
bd4c625c LT |
2250 | reiserfs_proc_info_global_done(); |
2251 | unregister_filesystem(&reiserfs_fs_type); | |
2252 | destroy_inodecache(); | |
1da177e4 LT |
2253 | } |
2254 | ||
2255 | struct file_system_type reiserfs_fs_type = { | |
bd4c625c LT |
2256 | .owner = THIS_MODULE, |
2257 | .name = "reiserfs", | |
152a0836 | 2258 | .mount = get_super_block, |
edc666e2 | 2259 | .kill_sb = reiserfs_kill_sb, |
bd4c625c | 2260 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 LT |
2261 | }; |
2262 | ||
bd4c625c LT |
2263 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
2264 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); | |
2265 | MODULE_LICENSE("GPL"); | |
1da177e4 | 2266 | |
bd4c625c LT |
2267 | module_init(init_reiserfs_fs); |
2268 | module_exit(exit_reiserfs_fs); |