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1da177e4 LT |
1 | /* |
2 | * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README | |
3 | * | |
4 | * Trivial changes by Alan Cox to add the LFS fixes | |
5 | * | |
6 | * Trivial Changes: | |
7 | * Rights granted to Hans Reiser to redistribute under other terms providing | |
8 | * he accepts all liability including but not limited to patent, fitness | |
9 | * for purpose, and direct or indirect claims arising from failure to perform. | |
10 | * | |
11 | * NO WARRANTY | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/vmalloc.h> | |
16 | #include <linux/time.h> | |
17 | #include <asm/uaccess.h> | |
18 | #include <linux/reiserfs_fs.h> | |
19 | #include <linux/reiserfs_acl.h> | |
20 | #include <linux/reiserfs_xattr.h> | |
1da177e4 LT |
21 | #include <linux/init.h> |
22 | #include <linux/blkdev.h> | |
23 | #include <linux/buffer_head.h> | |
a5694255 | 24 | #include <linux/exportfs.h> |
74abb989 | 25 | #include <linux/quotaops.h> |
1da177e4 | 26 | #include <linux/vfs.h> |
6b3286ed | 27 | #include <linux/mnt_namespace.h> |
1da177e4 LT |
28 | #include <linux/mount.h> |
29 | #include <linux/namei.h> | |
1da177e4 LT |
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 | ||
c4be0c1d | 86 | static int reiserfs_freeze(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); | |
c4be0c1d | 104 | return 0; |
1da177e4 LT |
105 | } |
106 | ||
c4be0c1d | 107 | static int reiserfs_unfreeze(struct super_block *s) |
bd4c625c LT |
108 | { |
109 | reiserfs_allow_writes(s); | |
c4be0c1d | 110 | return 0; |
1da177e4 LT |
111 | } |
112 | ||
bd4c625c | 113 | extern const struct in_core_key MAX_IN_CORE_KEY; |
1da177e4 LT |
114 | |
115 | /* this is used to delete "save link" when there are no items of a | |
116 | file it points to. It can either happen if unlink is completed but | |
117 | "save unlink" removal, or if file has both unlink and truncate | |
118 | pending and as unlink completes first (because key of "save link" | |
119 | protecting unlink is bigger that a key lf "save link" which | |
120 | protects truncate), so there left no items to make truncate | |
121 | completion on */ | |
bd4c625c LT |
122 | static int remove_save_link_only(struct super_block *s, |
123 | struct reiserfs_key *key, int oid_free) | |
1da177e4 | 124 | { |
bd4c625c LT |
125 | struct reiserfs_transaction_handle th; |
126 | int err; | |
127 | ||
128 | /* we are going to do one balancing */ | |
129 | err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); | |
130 | if (err) | |
131 | return err; | |
132 | ||
133 | reiserfs_delete_solid_item(&th, NULL, key); | |
134 | if (oid_free) | |
135 | /* removals are protected by direct items */ | |
136 | reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); | |
137 | ||
138 | return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT); | |
1da177e4 | 139 | } |
bd4c625c | 140 | |
1da177e4 LT |
141 | #ifdef CONFIG_QUOTA |
142 | static int reiserfs_quota_on_mount(struct super_block *, int); | |
143 | #endif | |
bd4c625c | 144 | |
1da177e4 | 145 | /* look for uncompleted unlinks and truncates and complete them */ |
bd4c625c | 146 | static int finish_unfinished(struct super_block *s) |
1da177e4 | 147 | { |
bd4c625c LT |
148 | INITIALIZE_PATH(path); |
149 | struct cpu_key max_cpu_key, obj_key; | |
fb46f341 | 150 | struct reiserfs_key save_link_key, last_inode_key; |
bd4c625c LT |
151 | int retval = 0; |
152 | struct item_head *ih; | |
153 | struct buffer_head *bh; | |
154 | int item_pos; | |
155 | char *item; | |
156 | int done; | |
157 | struct inode *inode; | |
158 | int truncate; | |
1da177e4 | 159 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
160 | int i; |
161 | int ms_active_set; | |
1da177e4 | 162 | #endif |
bd4c625c LT |
163 | |
164 | /* compose key to look for "save" links */ | |
165 | max_cpu_key.version = KEY_FORMAT_3_5; | |
166 | max_cpu_key.on_disk_key.k_dir_id = ~0U; | |
167 | max_cpu_key.on_disk_key.k_objectid = ~0U; | |
168 | set_cpu_key_k_offset(&max_cpu_key, ~0U); | |
169 | max_cpu_key.key_length = 3; | |
1da177e4 | 170 | |
fb46f341 LW |
171 | memset(&last_inode_key, 0, sizeof(last_inode_key)); |
172 | ||
1da177e4 | 173 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
174 | /* Needed for iput() to work correctly and not trash data */ |
175 | if (s->s_flags & MS_ACTIVE) { | |
176 | ms_active_set = 0; | |
177 | } else { | |
178 | ms_active_set = 1; | |
179 | s->s_flags |= MS_ACTIVE; | |
180 | } | |
181 | /* Turn on quotas so that they are updated correctly */ | |
182 | for (i = 0; i < MAXQUOTAS; i++) { | |
183 | if (REISERFS_SB(s)->s_qf_names[i]) { | |
184 | int ret = reiserfs_quota_on_mount(s, i); | |
185 | if (ret < 0) | |
45b03d5e JM |
186 | reiserfs_warning(s, "reiserfs-2500", |
187 | "cannot turn on journaled " | |
188 | "quota: error %d", ret); | |
bd4c625c LT |
189 | } |
190 | } | |
1da177e4 | 191 | #endif |
bd4c625c LT |
192 | |
193 | done = 0; | |
194 | REISERFS_SB(s)->s_is_unlinked_ok = 1; | |
195 | while (!retval) { | |
196 | retval = search_item(s, &max_cpu_key, &path); | |
197 | if (retval != ITEM_NOT_FOUND) { | |
0030b645 JM |
198 | reiserfs_error(s, "vs-2140", |
199 | "search_by_key returned %d", retval); | |
bd4c625c LT |
200 | break; |
201 | } | |
202 | ||
203 | bh = get_last_bh(&path); | |
204 | item_pos = get_item_pos(&path); | |
205 | if (item_pos != B_NR_ITEMS(bh)) { | |
45b03d5e JM |
206 | reiserfs_warning(s, "vs-2060", |
207 | "wrong position found"); | |
bd4c625c LT |
208 | break; |
209 | } | |
210 | item_pos--; | |
211 | ih = B_N_PITEM_HEAD(bh, item_pos); | |
212 | ||
213 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) | |
214 | /* there are no "save" links anymore */ | |
215 | break; | |
216 | ||
217 | save_link_key = ih->ih_key; | |
218 | if (is_indirect_le_ih(ih)) | |
219 | truncate = 1; | |
220 | else | |
221 | truncate = 0; | |
222 | ||
223 | /* reiserfs_iget needs k_dirid and k_objectid only */ | |
224 | item = B_I_PITEM(bh, ih); | |
225 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); | |
226 | obj_key.on_disk_key.k_objectid = | |
227 | le32_to_cpu(ih->ih_key.k_objectid); | |
228 | obj_key.on_disk_key.k_offset = 0; | |
229 | obj_key.on_disk_key.k_type = 0; | |
230 | ||
231 | pathrelse(&path); | |
232 | ||
233 | inode = reiserfs_iget(s, &obj_key); | |
234 | if (!inode) { | |
235 | /* the unlink almost completed, it just did not manage to remove | |
236 | "save" link and release objectid */ | |
45b03d5e | 237 | reiserfs_warning(s, "vs-2180", "iget failed for %K", |
bd4c625c LT |
238 | &obj_key); |
239 | retval = remove_save_link_only(s, &save_link_key, 1); | |
240 | continue; | |
241 | } | |
242 | ||
243 | if (!truncate && inode->i_nlink) { | |
244 | /* file is not unlinked */ | |
45b03d5e JM |
245 | reiserfs_warning(s, "vs-2185", |
246 | "file %K is not unlinked", | |
bd4c625c LT |
247 | &obj_key); |
248 | retval = remove_save_link_only(s, &save_link_key, 0); | |
249 | continue; | |
250 | } | |
251 | DQUOT_INIT(inode); | |
252 | ||
253 | if (truncate && S_ISDIR(inode->i_mode)) { | |
254 | /* We got a truncate request for a dir which is impossible. | |
255 | The only imaginable way is to execute unfinished truncate request | |
256 | then boot into old kernel, remove the file and create dir with | |
257 | the same key. */ | |
45b03d5e JM |
258 | reiserfs_warning(s, "green-2101", |
259 | "impossible truncate on a " | |
260 | "directory %k. Please report", | |
bd4c625c LT |
261 | INODE_PKEY(inode)); |
262 | retval = remove_save_link_only(s, &save_link_key, 0); | |
263 | truncate = 0; | |
264 | iput(inode); | |
265 | continue; | |
266 | } | |
267 | ||
268 | if (truncate) { | |
269 | REISERFS_I(inode)->i_flags |= | |
270 | i_link_saved_truncate_mask; | |
271 | /* not completed truncate found. New size was committed together | |
272 | with "save" link */ | |
273 | reiserfs_info(s, "Truncating %k to %Ld ..", | |
274 | INODE_PKEY(inode), inode->i_size); | |
275 | reiserfs_truncate_file(inode, | |
276 | 0 | |
277 | /*don't update modification time */ | |
278 | ); | |
279 | retval = remove_save_link(inode, truncate); | |
280 | } else { | |
281 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
282 | /* not completed unlink (rmdir) found */ | |
283 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); | |
fb46f341 LW |
284 | if (memcmp(&last_inode_key, INODE_PKEY(inode), |
285 | sizeof(last_inode_key))){ | |
286 | last_inode_key = *INODE_PKEY(inode); | |
287 | /* removal gets completed in iput */ | |
288 | retval = 0; | |
289 | } else { | |
45b03d5e JM |
290 | reiserfs_warning(s, "super-2189", "Dead loop " |
291 | "in finish_unfinished " | |
292 | "detected, just remove " | |
293 | "save link\n"); | |
fb46f341 LW |
294 | retval = remove_save_link_only(s, |
295 | &save_link_key, 0); | |
296 | } | |
bd4c625c LT |
297 | } |
298 | ||
299 | iput(inode); | |
300 | printk("done\n"); | |
301 | done++; | |
302 | } | |
303 | REISERFS_SB(s)->s_is_unlinked_ok = 0; | |
304 | ||
1da177e4 | 305 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
306 | /* Turn quotas off */ |
307 | for (i = 0; i < MAXQUOTAS; i++) { | |
308 | if (sb_dqopt(s)->files[i]) | |
1b445a9c | 309 | vfs_quota_off(s, i, 0); |
bd4c625c LT |
310 | } |
311 | if (ms_active_set) | |
312 | /* Restore the flag back */ | |
313 | s->s_flags &= ~MS_ACTIVE; | |
1da177e4 | 314 | #endif |
bd4c625c LT |
315 | pathrelse(&path); |
316 | if (done) | |
317 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " | |
318 | "Completed\n", done); | |
319 | return retval; | |
1da177e4 | 320 | } |
bd4c625c | 321 | |
1da177e4 LT |
322 | /* to protect file being unlinked from getting lost we "safe" link files |
323 | being unlinked. This link will be deleted in the same transaction with last | |
3a4fa0a2 | 324 | item of file. mounting the filesystem we scan all these links and remove |
1da177e4 | 325 | files which almost got lost */ |
bd4c625c LT |
326 | void add_save_link(struct reiserfs_transaction_handle *th, |
327 | struct inode *inode, int truncate) | |
1da177e4 | 328 | { |
bd4c625c LT |
329 | INITIALIZE_PATH(path); |
330 | int retval; | |
331 | struct cpu_key key; | |
332 | struct item_head ih; | |
333 | __le32 link; | |
334 | ||
335 | BUG_ON(!th->t_trans_id); | |
336 | ||
337 | /* file can only get one "save link" of each kind */ | |
338 | RFALSE(truncate && | |
339 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), | |
340 | "saved link already exists for truncated inode %lx", | |
341 | (long)inode->i_ino); | |
342 | RFALSE(!truncate && | |
343 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), | |
344 | "saved link already exists for unlinked inode %lx", | |
345 | (long)inode->i_ino); | |
346 | ||
347 | /* setup key of "save" link */ | |
348 | key.version = KEY_FORMAT_3_5; | |
349 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; | |
350 | key.on_disk_key.k_objectid = inode->i_ino; | |
351 | if (!truncate) { | |
352 | /* unlink, rmdir, rename */ | |
353 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); | |
354 | set_cpu_key_k_type(&key, TYPE_DIRECT); | |
355 | ||
356 | /* item head of "safe" link */ | |
357 | make_le_item_head(&ih, &key, key.version, | |
358 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, | |
359 | 4 /*length */ , 0xffff /*free space */ ); | |
360 | } else { | |
361 | /* truncate */ | |
362 | if (S_ISDIR(inode->i_mode)) | |
45b03d5e JM |
363 | reiserfs_warning(inode->i_sb, "green-2102", |
364 | "Adding a truncate savelink for " | |
365 | "a directory %k! Please report", | |
bd4c625c LT |
366 | INODE_PKEY(inode)); |
367 | set_cpu_key_k_offset(&key, 1); | |
368 | set_cpu_key_k_type(&key, TYPE_INDIRECT); | |
369 | ||
370 | /* item head of "safe" link */ | |
371 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, | |
372 | 4 /*length */ , 0 /*free space */ ); | |
373 | } | |
374 | key.key_length = 3; | |
375 | ||
376 | /* look for its place in the tree */ | |
377 | retval = search_item(inode->i_sb, &key, &path); | |
378 | if (retval != ITEM_NOT_FOUND) { | |
379 | if (retval != -ENOSPC) | |
0030b645 JM |
380 | reiserfs_error(inode->i_sb, "vs-2100", |
381 | "search_by_key (%K) returned %d", &key, | |
382 | retval); | |
bd4c625c LT |
383 | pathrelse(&path); |
384 | return; | |
385 | } | |
1da177e4 | 386 | |
bd4c625c LT |
387 | /* body of "save" link */ |
388 | link = INODE_PKEY(inode)->k_dir_id; | |
389 | ||
390 | /* put "save" link inot tree, don't charge quota to anyone */ | |
391 | retval = | |
392 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); | |
393 | if (retval) { | |
394 | if (retval != -ENOSPC) | |
0030b645 JM |
395 | reiserfs_error(inode->i_sb, "vs-2120", |
396 | "insert_item returned %d", retval); | |
bd4c625c LT |
397 | } else { |
398 | if (truncate) | |
399 | REISERFS_I(inode)->i_flags |= | |
400 | i_link_saved_truncate_mask; | |
401 | else | |
402 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
403 | } | |
404 | } | |
1da177e4 LT |
405 | |
406 | /* this opens transaction unlike add_save_link */ | |
bd4c625c | 407 | int remove_save_link(struct inode *inode, int truncate) |
1da177e4 | 408 | { |
bd4c625c LT |
409 | struct reiserfs_transaction_handle th; |
410 | struct reiserfs_key key; | |
411 | int err; | |
412 | ||
413 | /* we are going to do one balancing only */ | |
414 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
415 | if (err) | |
416 | return err; | |
417 | ||
418 | /* setup key of "save" link */ | |
419 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); | |
420 | key.k_objectid = INODE_PKEY(inode)->k_objectid; | |
421 | if (!truncate) { | |
422 | /* unlink, rmdir, rename */ | |
423 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, | |
424 | 1 + inode->i_sb->s_blocksize); | |
425 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); | |
426 | } else { | |
427 | /* truncate */ | |
428 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); | |
429 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); | |
430 | } | |
1da177e4 | 431 | |
bd4c625c LT |
432 | if ((truncate && |
433 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || | |
434 | (!truncate && | |
435 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) | |
436 | /* don't take quota bytes from anywhere */ | |
437 | reiserfs_delete_solid_item(&th, NULL, &key); | |
438 | if (!truncate) { | |
439 | reiserfs_release_objectid(&th, inode->i_ino); | |
440 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; | |
441 | } else | |
442 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; | |
443 | ||
444 | return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
445 | } | |
1da177e4 | 446 | |
edc666e2 | 447 | static void reiserfs_kill_sb(struct super_block *s) |
1da177e4 | 448 | { |
edc666e2 | 449 | if (REISERFS_SB(s)) { |
fe08a9d4 | 450 | #ifdef CONFIG_REISERFS_FS_XATTR |
edc666e2 DH |
451 | if (REISERFS_SB(s)->xattr_root) { |
452 | d_invalidate(REISERFS_SB(s)->xattr_root); | |
453 | dput(REISERFS_SB(s)->xattr_root); | |
454 | REISERFS_SB(s)->xattr_root = NULL; | |
455 | } | |
fe08a9d4 | 456 | #endif |
edc666e2 DH |
457 | if (REISERFS_SB(s)->priv_root) { |
458 | d_invalidate(REISERFS_SB(s)->priv_root); | |
459 | dput(REISERFS_SB(s)->priv_root); | |
460 | REISERFS_SB(s)->priv_root = NULL; | |
461 | } | |
bd4c625c LT |
462 | } |
463 | ||
edc666e2 DH |
464 | kill_block_super(s); |
465 | } | |
466 | ||
467 | static void reiserfs_put_super(struct super_block *s) | |
468 | { | |
469 | struct reiserfs_transaction_handle th; | |
470 | th.t_trans_id = 0; | |
bd4c625c LT |
471 | |
472 | /* change file system state to current state if it was mounted with read-write permissions */ | |
473 | if (!(s->s_flags & MS_RDONLY)) { | |
474 | if (!journal_begin(&th, s, 10)) { | |
475 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
476 | 1); | |
477 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), | |
478 | REISERFS_SB(s)->s_mount_state); | |
479 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
480 | } | |
481 | } | |
482 | ||
483 | /* note, journal_release checks for readonly mount, and can decide not | |
484 | ** to do a journal_end | |
485 | */ | |
486 | journal_release(&th, s); | |
487 | ||
5065227b | 488 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
489 | |
490 | brelse(SB_BUFFER_WITH_SB(s)); | |
491 | ||
492 | print_statistics(s); | |
493 | ||
bd4c625c | 494 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
45b03d5e | 495 | reiserfs_warning(s, "green-2005", "reserved blocks left %d", |
bd4c625c LT |
496 | REISERFS_SB(s)->reserved_blocks); |
497 | } | |
498 | ||
499 | reiserfs_proc_info_done(s); | |
500 | ||
501 | kfree(s->s_fs_info); | |
502 | s->s_fs_info = NULL; | |
503 | ||
504 | return; | |
1da177e4 LT |
505 | } |
506 | ||
e18b890b | 507 | static struct kmem_cache *reiserfs_inode_cachep; |
1da177e4 LT |
508 | |
509 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) | |
510 | { | |
511 | struct reiserfs_inode_info *ei; | |
bd4c625c | 512 | ei = (struct reiserfs_inode_info *) |
e94b1766 | 513 | kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
514 | if (!ei) |
515 | return NULL; | |
516 | return &ei->vfs_inode; | |
517 | } | |
518 | ||
519 | static void reiserfs_destroy_inode(struct inode *inode) | |
520 | { | |
521 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); | |
522 | } | |
523 | ||
51cc5068 | 524 | static void init_once(void *foo) |
1da177e4 | 525 | { |
bd4c625c | 526 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
1da177e4 | 527 | |
a35afb83 CL |
528 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
529 | inode_init_once(&ei->vfs_inode); | |
cfe14677 | 530 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
a35afb83 CL |
531 | ei->i_acl_access = NULL; |
532 | ei->i_acl_default = NULL; | |
cfe14677 | 533 | #endif |
1da177e4 | 534 | } |
bd4c625c | 535 | |
1da177e4 LT |
536 | static int init_inodecache(void) |
537 | { | |
538 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", | |
bd4c625c LT |
539 | sizeof(struct |
540 | reiserfs_inode_info), | |
fffb60f9 PJ |
541 | 0, (SLAB_RECLAIM_ACCOUNT| |
542 | SLAB_MEM_SPREAD), | |
20c2df83 | 543 | init_once); |
1da177e4 LT |
544 | if (reiserfs_inode_cachep == NULL) |
545 | return -ENOMEM; | |
546 | return 0; | |
547 | } | |
548 | ||
549 | static void destroy_inodecache(void) | |
550 | { | |
1a1d92c1 | 551 | kmem_cache_destroy(reiserfs_inode_cachep); |
1da177e4 LT |
552 | } |
553 | ||
554 | /* we don't mark inodes dirty, we just log them */ | |
bd4c625c LT |
555 | static void reiserfs_dirty_inode(struct inode *inode) |
556 | { | |
557 | struct reiserfs_transaction_handle th; | |
558 | ||
559 | int err = 0; | |
560 | if (inode->i_sb->s_flags & MS_RDONLY) { | |
45b03d5e JM |
561 | reiserfs_warning(inode->i_sb, "clm-6006", |
562 | "writing inode %lu on readonly FS", | |
bd4c625c LT |
563 | inode->i_ino); |
564 | return; | |
565 | } | |
566 | reiserfs_write_lock(inode->i_sb); | |
567 | ||
568 | /* this is really only used for atime updates, so they don't have | |
569 | ** to be included in O_SYNC or fsync | |
570 | */ | |
571 | err = journal_begin(&th, inode->i_sb, 1); | |
572 | if (err) { | |
573 | reiserfs_write_unlock(inode->i_sb); | |
574 | return; | |
575 | } | |
576 | reiserfs_update_sd(&th, inode); | |
577 | journal_end(&th, inode->i_sb, 1); | |
578 | reiserfs_write_unlock(inode->i_sb); | |
1da177e4 LT |
579 | } |
580 | ||
cfe14677 | 581 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
bd4c625c | 582 | static void reiserfs_clear_inode(struct inode *inode) |
1da177e4 | 583 | { |
bd4c625c | 584 | struct posix_acl *acl; |
1da177e4 | 585 | |
bd4c625c LT |
586 | acl = REISERFS_I(inode)->i_acl_access; |
587 | if (acl && !IS_ERR(acl)) | |
588 | posix_acl_release(acl); | |
589 | REISERFS_I(inode)->i_acl_access = NULL; | |
1da177e4 | 590 | |
bd4c625c LT |
591 | acl = REISERFS_I(inode)->i_acl_default; |
592 | if (acl && !IS_ERR(acl)) | |
593 | posix_acl_release(acl); | |
594 | REISERFS_I(inode)->i_acl_default = NULL; | |
1da177e4 | 595 | } |
cfe14677 AD |
596 | #else |
597 | #define reiserfs_clear_inode NULL | |
598 | #endif | |
1da177e4 LT |
599 | |
600 | #ifdef CONFIG_QUOTA | |
bd4c625c LT |
601 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
602 | size_t, loff_t); | |
603 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, | |
604 | loff_t); | |
1da177e4 LT |
605 | #endif |
606 | ||
ee9b6d61 | 607 | static const struct super_operations reiserfs_sops = { |
bd4c625c LT |
608 | .alloc_inode = reiserfs_alloc_inode, |
609 | .destroy_inode = reiserfs_destroy_inode, | |
610 | .write_inode = reiserfs_write_inode, | |
611 | .dirty_inode = reiserfs_dirty_inode, | |
612 | .delete_inode = reiserfs_delete_inode, | |
613 | .clear_inode = reiserfs_clear_inode, | |
614 | .put_super = reiserfs_put_super, | |
615 | .write_super = reiserfs_write_super, | |
616 | .sync_fs = reiserfs_sync_fs, | |
c4be0c1d TS |
617 | .freeze_fs = reiserfs_freeze, |
618 | .unfreeze_fs = reiserfs_unfreeze, | |
bd4c625c LT |
619 | .statfs = reiserfs_statfs, |
620 | .remount_fs = reiserfs_remount, | |
cdf6ccc8 | 621 | .show_options = generic_show_options, |
1da177e4 | 622 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
623 | .quota_read = reiserfs_quota_read, |
624 | .quota_write = reiserfs_quota_write, | |
1da177e4 LT |
625 | #endif |
626 | }; | |
627 | ||
628 | #ifdef CONFIG_QUOTA | |
629 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
630 | ||
631 | static int reiserfs_dquot_initialize(struct inode *, int); | |
632 | static int reiserfs_dquot_drop(struct inode *); | |
633 | static int reiserfs_write_dquot(struct dquot *); | |
634 | static int reiserfs_acquire_dquot(struct dquot *); | |
635 | static int reiserfs_release_dquot(struct dquot *); | |
636 | static int reiserfs_mark_dquot_dirty(struct dquot *); | |
637 | static int reiserfs_write_info(struct super_block *, int); | |
1b445a9c | 638 | static int reiserfs_quota_on(struct super_block *, int, int, char *, int); |
1da177e4 | 639 | |
bd4c625c LT |
640 | static struct dquot_operations reiserfs_quota_operations = { |
641 | .initialize = reiserfs_dquot_initialize, | |
642 | .drop = reiserfs_dquot_drop, | |
643 | .alloc_space = dquot_alloc_space, | |
644 | .alloc_inode = dquot_alloc_inode, | |
645 | .free_space = dquot_free_space, | |
646 | .free_inode = dquot_free_inode, | |
647 | .transfer = dquot_transfer, | |
648 | .write_dquot = reiserfs_write_dquot, | |
649 | .acquire_dquot = reiserfs_acquire_dquot, | |
650 | .release_dquot = reiserfs_release_dquot, | |
651 | .mark_dirty = reiserfs_mark_dquot_dirty, | |
652 | .write_info = reiserfs_write_info, | |
4103003b JK |
653 | .alloc_dquot = dquot_alloc, |
654 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
655 | }; |
656 | ||
bd4c625c LT |
657 | static struct quotactl_ops reiserfs_qctl_operations = { |
658 | .quota_on = reiserfs_quota_on, | |
659 | .quota_off = vfs_quota_off, | |
660 | .quota_sync = vfs_quota_sync, | |
661 | .get_info = vfs_get_dqinfo, | |
662 | .set_info = vfs_set_dqinfo, | |
663 | .get_dqblk = vfs_get_dqblk, | |
664 | .set_dqblk = vfs_set_dqblk, | |
1da177e4 LT |
665 | }; |
666 | #endif | |
667 | ||
39655164 | 668 | static const struct export_operations reiserfs_export_ops = { |
bd4c625c | 669 | .encode_fh = reiserfs_encode_fh, |
be55caf1 CH |
670 | .fh_to_dentry = reiserfs_fh_to_dentry, |
671 | .fh_to_parent = reiserfs_fh_to_parent, | |
bd4c625c | 672 | .get_parent = reiserfs_get_parent, |
bd4c625c | 673 | }; |
1da177e4 LT |
674 | |
675 | /* this struct is used in reiserfs_getopt () for containing the value for those | |
676 | mount options that have values rather than being toggles. */ | |
677 | typedef struct { | |
bd4c625c LT |
678 | char *value; |
679 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
680 | value is found, 0 is no bits are to be changed. */ | |
681 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
682 | value is found, 0 is no bits are to be changed. This is | |
683 | applied BEFORE setmask */ | |
1da177e4 LT |
684 | } arg_desc_t; |
685 | ||
686 | /* Set this bit in arg_required to allow empty arguments */ | |
687 | #define REISERFS_OPT_ALLOWEMPTY 31 | |
688 | ||
689 | /* this struct is used in reiserfs_getopt() for describing the set of reiserfs | |
690 | mount options */ | |
691 | typedef struct { | |
bd4c625c LT |
692 | char *option_name; |
693 | int arg_required; /* 0 if argument is not required, not 0 otherwise */ | |
694 | const arg_desc_t *values; /* list of values accepted by an option */ | |
695 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
696 | value is found, 0 is no bits are to be changed. */ | |
697 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
698 | value is found, 0 is no bits are to be changed. This is | |
699 | applied BEFORE setmask */ | |
1da177e4 LT |
700 | } opt_desc_t; |
701 | ||
702 | /* possible values for -o data= */ | |
703 | static const arg_desc_t logging_mode[] = { | |
bd4c625c LT |
704 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
705 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, | |
706 | {"journal", 1 << REISERFS_DATA_LOG, | |
707 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, | |
708 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, | |
709 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, | |
cd02b966 | 710 | {.value = NULL} |
1da177e4 LT |
711 | }; |
712 | ||
713 | /* possible values for -o barrier= */ | |
714 | static const arg_desc_t barrier_mode[] = { | |
bd4c625c LT |
715 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
716 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, | |
cd02b966 | 717 | {.value = NULL} |
1da177e4 LT |
718 | }; |
719 | ||
720 | /* possible values for "-o block-allocator=" and bits which are to be set in | |
721 | s_mount_opt of reiserfs specific part of in-core super block */ | |
722 | static const arg_desc_t balloc[] = { | |
bd4c625c LT |
723 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
724 | {"border", 0, 1 << REISERFS_NO_BORDER}, | |
725 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, | |
726 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, | |
727 | {"test4", 1 << REISERFS_TEST4, 0}, | |
728 | {"notest4", 0, 1 << REISERFS_TEST4}, | |
729 | {NULL, 0, 0} | |
1da177e4 LT |
730 | }; |
731 | ||
732 | static const arg_desc_t tails[] = { | |
bd4c625c LT |
733 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
734 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
735 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, | |
736 | {NULL, 0, 0} | |
1da177e4 LT |
737 | }; |
738 | ||
739 | static const arg_desc_t error_actions[] = { | |
bd4c625c LT |
740 | {"panic", 1 << REISERFS_ERROR_PANIC, |
741 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, | |
742 | {"ro-remount", 1 << REISERFS_ERROR_RO, | |
743 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, | |
1da177e4 | 744 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
bd4c625c LT |
745 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
746 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, | |
1da177e4 | 747 | #endif |
bd4c625c | 748 | {NULL, 0, 0}, |
1da177e4 LT |
749 | }; |
750 | ||
1da177e4 LT |
751 | /* proceed only one option from a list *cur - string containing of mount options |
752 | opts - array of options which are accepted | |
753 | opt_arg - if option is found and requires an argument and if it is specifed | |
754 | in the input - pointer to the argument is stored here | |
755 | bit_flags - if option requires to set a certain bit - it is set here | |
756 | return -1 if unknown option is found, opt->arg_required otherwise */ | |
bd4c625c LT |
757 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
758 | char **opt_arg, unsigned long *bit_flags) | |
1da177e4 | 759 | { |
bd4c625c LT |
760 | char *p; |
761 | /* foo=bar, | |
762 | ^ ^ ^ | |
763 | | | +-- option_end | |
764 | | +-- arg_start | |
765 | +-- option_start | |
766 | */ | |
767 | const opt_desc_t *opt; | |
768 | const arg_desc_t *arg; | |
769 | ||
770 | p = *cur; | |
771 | ||
772 | /* assume argument cannot contain commas */ | |
773 | *cur = strchr(p, ','); | |
774 | if (*cur) { | |
775 | *(*cur) = '\0'; | |
776 | (*cur)++; | |
777 | } | |
778 | ||
779 | if (!strncmp(p, "alloc=", 6)) { | |
780 | /* Ugly special case, probably we should redo options parser so that | |
781 | it can understand several arguments for some options, also so that | |
782 | it can fill several bitfields with option values. */ | |
783 | if (reiserfs_parse_alloc_options(s, p + 6)) { | |
784 | return -1; | |
785 | } else { | |
786 | return 0; | |
787 | } | |
788 | } | |
789 | ||
790 | /* for every option in the list */ | |
791 | for (opt = opts; opt->option_name; opt++) { | |
792 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { | |
793 | if (bit_flags) { | |
794 | if (opt->clrmask == | |
795 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
796 | reiserfs_warning(s, "super-6500", |
797 | "%s not supported.\n", | |
bd4c625c LT |
798 | p); |
799 | else | |
800 | *bit_flags &= ~opt->clrmask; | |
801 | if (opt->setmask == | |
802 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
803 | reiserfs_warning(s, "super-6501", |
804 | "%s not supported.\n", | |
bd4c625c LT |
805 | p); |
806 | else | |
807 | *bit_flags |= opt->setmask; | |
808 | } | |
809 | break; | |
810 | } | |
811 | } | |
812 | if (!opt->option_name) { | |
45b03d5e JM |
813 | reiserfs_warning(s, "super-6502", |
814 | "unknown mount option \"%s\"", p); | |
bd4c625c LT |
815 | return -1; |
816 | } | |
817 | ||
818 | p += strlen(opt->option_name); | |
819 | switch (*p) { | |
820 | case '=': | |
821 | if (!opt->arg_required) { | |
45b03d5e JM |
822 | reiserfs_warning(s, "super-6503", |
823 | "the option \"%s\" does not " | |
824 | "require an argument\n", | |
bd4c625c LT |
825 | opt->option_name); |
826 | return -1; | |
827 | } | |
828 | break; | |
829 | ||
830 | case 0: | |
831 | if (opt->arg_required) { | |
45b03d5e JM |
832 | reiserfs_warning(s, "super-6504", |
833 | "the option \"%s\" requires an " | |
834 | "argument\n", opt->option_name); | |
bd4c625c LT |
835 | return -1; |
836 | } | |
837 | break; | |
838 | default: | |
45b03d5e JM |
839 | reiserfs_warning(s, "super-6505", |
840 | "head of option \"%s\" is only correct\n", | |
bd4c625c LT |
841 | opt->option_name); |
842 | return -1; | |
843 | } | |
844 | ||
845 | /* move to the argument, or to next option if argument is not required */ | |
846 | p++; | |
847 | ||
848 | if (opt->arg_required | |
849 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) | |
850 | && !strlen(p)) { | |
851 | /* this catches "option=," if not allowed */ | |
45b03d5e JM |
852 | reiserfs_warning(s, "super-6506", |
853 | "empty argument for \"%s\"\n", | |
bd4c625c LT |
854 | opt->option_name); |
855 | return -1; | |
856 | } | |
857 | ||
858 | if (!opt->values) { | |
859 | /* *=NULLopt_arg contains pointer to argument */ | |
860 | *opt_arg = p; | |
861 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); | |
862 | } | |
863 | ||
864 | /* values possible for this option are listed in opt->values */ | |
865 | for (arg = opt->values; arg->value; arg++) { | |
866 | if (!strcmp(p, arg->value)) { | |
867 | if (bit_flags) { | |
868 | *bit_flags &= ~arg->clrmask; | |
869 | *bit_flags |= arg->setmask; | |
870 | } | |
871 | return opt->arg_required; | |
872 | } | |
873 | } | |
874 | ||
45b03d5e JM |
875 | reiserfs_warning(s, "super-6506", |
876 | "bad value \"%s\" for option \"%s\"\n", p, | |
bd4c625c | 877 | opt->option_name); |
1da177e4 | 878 | return -1; |
1da177e4 LT |
879 | } |
880 | ||
881 | /* returns 0 if something is wrong in option string, 1 - otherwise */ | |
bd4c625c LT |
882 | static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */ |
883 | unsigned long *mount_options, | |
884 | /* after the parsing phase, contains the | |
885 | collection of bitflags defining what | |
886 | mount options were selected. */ | |
887 | unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */ | |
888 | char **jdev_name, | |
00b44197 JK |
889 | unsigned int *commit_max_age, |
890 | char **qf_names, | |
891 | unsigned int *qfmt) | |
1da177e4 | 892 | { |
bd4c625c LT |
893 | int c; |
894 | char *arg = NULL; | |
895 | char *pos; | |
896 | opt_desc_t opts[] = { | |
897 | /* Compatibility stuff, so that -o notail for old setups still work */ | |
898 | {"tails",.arg_required = 't',.values = tails}, | |
899 | {"notail",.clrmask = | |
900 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
901 | {"conv",.setmask = 1 << REISERFS_CONVERT}, | |
902 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, | |
903 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, | |
1da177e4 | 904 | #ifdef CONFIG_REISERFS_FS_XATTR |
bd4c625c LT |
905 | {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
906 | {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, | |
1da177e4 | 907 | #else |
bd4c625c LT |
908 | {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
909 | {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 LT |
910 | #endif |
911 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
bd4c625c LT |
912 | {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
913 | {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, | |
1da177e4 | 914 | #else |
bd4c625c LT |
915 | {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
916 | {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 | 917 | #endif |
cd02b966 | 918 | {.option_name = "nolog"}, |
bd4c625c LT |
919 | {"replayonly",.setmask = 1 << REPLAYONLY}, |
920 | {"block-allocator",.arg_required = 'a',.values = balloc}, | |
921 | {"data",.arg_required = 'd',.values = logging_mode}, | |
922 | {"barrier",.arg_required = 'b',.values = barrier_mode}, | |
923 | {"resize",.arg_required = 'r',.values = NULL}, | |
924 | {"jdev",.arg_required = 'j',.values = NULL}, | |
925 | {"nolargeio",.arg_required = 'w',.values = NULL}, | |
926 | {"commit",.arg_required = 'c',.values = NULL}, | |
927 | {"usrquota",.setmask = 1 << REISERFS_QUOTA}, | |
928 | {"grpquota",.setmask = 1 << REISERFS_QUOTA}, | |
929 | {"noquota",.clrmask = 1 << REISERFS_QUOTA}, | |
930 | {"errors",.arg_required = 'e',.values = error_actions}, | |
931 | {"usrjquota",.arg_required = | |
932 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
933 | {"grpjquota",.arg_required = | |
934 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
935 | {"jqfmt",.arg_required = 'f',.values = NULL}, | |
cd02b966 | 936 | {.option_name = NULL} |
bd4c625c LT |
937 | }; |
938 | ||
939 | *blocks = 0; | |
940 | if (!options || !*options) | |
941 | /* use default configuration: create tails, journaling on, no | |
942 | conversion to newest format */ | |
943 | return 1; | |
944 | ||
945 | for (pos = options; pos;) { | |
946 | c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); | |
947 | if (c == -1) | |
948 | /* wrong option is given */ | |
9a3bb301 | 949 | return 0; |
1da177e4 | 950 | |
bd4c625c LT |
951 | if (c == 'r') { |
952 | char *p; | |
953 | ||
954 | p = NULL; | |
955 | /* "resize=NNN" or "resize=auto" */ | |
956 | ||
957 | if (!strcmp(arg, "auto")) { | |
958 | /* From JFS code, to auto-get the size. */ | |
959 | *blocks = | |
960 | s->s_bdev->bd_inode->i_size >> s-> | |
961 | s_blocksize_bits; | |
962 | } else { | |
963 | *blocks = simple_strtoul(arg, &p, 0); | |
964 | if (*p != '\0') { | |
965 | /* NNN does not look like a number */ | |
45b03d5e JM |
966 | reiserfs_warning(s, "super-6507", |
967 | "bad value %s for " | |
968 | "-oresize\n", arg); | |
bd4c625c LT |
969 | return 0; |
970 | } | |
971 | } | |
1da177e4 | 972 | } |
1da177e4 | 973 | |
bd4c625c LT |
974 | if (c == 'c') { |
975 | char *p = NULL; | |
976 | unsigned long val = simple_strtoul(arg, &p, 0); | |
977 | /* commit=NNN (time in seconds) */ | |
978 | if (*p != '\0' || val >= (unsigned int)-1) { | |
45b03d5e JM |
979 | reiserfs_warning(s, "super-6508", |
980 | "bad value %s for -ocommit\n", | |
bd4c625c LT |
981 | arg); |
982 | return 0; | |
983 | } | |
984 | *commit_max_age = (unsigned int)val; | |
1da177e4 | 985 | } |
1da177e4 | 986 | |
bd4c625c | 987 | if (c == 'w') { |
45b03d5e JM |
988 | reiserfs_warning(s, "super-6509", "nolargeio option " |
989 | "is no longer supported"); | |
36b756f2 | 990 | return 0; |
1da177e4 | 991 | } |
1da177e4 | 992 | |
bd4c625c LT |
993 | if (c == 'j') { |
994 | if (arg && *arg && jdev_name) { | |
995 | if (*jdev_name) { //Hm, already assigned? | |
45b03d5e JM |
996 | reiserfs_warning(s, "super-6510", |
997 | "journal device was " | |
998 | "already specified to " | |
999 | "be %s", *jdev_name); | |
bd4c625c LT |
1000 | return 0; |
1001 | } | |
1002 | *jdev_name = arg; | |
1003 | } | |
1da177e4 | 1004 | } |
bd4c625c LT |
1005 | #ifdef CONFIG_QUOTA |
1006 | if (c == 'u' || c == 'g') { | |
1007 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; | |
1008 | ||
6929f891 | 1009 | if (sb_any_quota_loaded(s) && |
00b44197 | 1010 | (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { |
45b03d5e JM |
1011 | reiserfs_warning(s, "super-6511", |
1012 | "cannot change journaled " | |
1013 | "quota options when quota " | |
1014 | "turned on."); | |
bd4c625c LT |
1015 | return 0; |
1016 | } | |
1017 | if (*arg) { /* Some filename specified? */ | |
1018 | if (REISERFS_SB(s)->s_qf_names[qtype] | |
1019 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], | |
1020 | arg)) { | |
45b03d5e JM |
1021 | reiserfs_warning(s, "super-6512", |
1022 | "%s quota file " | |
1023 | "already specified.", | |
bd4c625c LT |
1024 | QTYPE2NAME(qtype)); |
1025 | return 0; | |
1026 | } | |
1027 | if (strchr(arg, '/')) { | |
45b03d5e JM |
1028 | reiserfs_warning(s, "super-6513", |
1029 | "quotafile must be " | |
1030 | "on filesystem root."); | |
bd4c625c LT |
1031 | return 0; |
1032 | } | |
00b44197 | 1033 | qf_names[qtype] = |
bd4c625c | 1034 | kmalloc(strlen(arg) + 1, GFP_KERNEL); |
00b44197 | 1035 | if (!qf_names[qtype]) { |
45b03d5e JM |
1036 | reiserfs_warning(s, "reiserfs-2502", |
1037 | "not enough memory " | |
1038 | "for storing " | |
1039 | "quotafile name."); | |
bd4c625c LT |
1040 | return 0; |
1041 | } | |
00b44197 | 1042 | strcpy(qf_names[qtype], arg); |
bd4c625c LT |
1043 | *mount_options |= 1 << REISERFS_QUOTA; |
1044 | } else { | |
00b44197 JK |
1045 | if (qf_names[qtype] != |
1046 | REISERFS_SB(s)->s_qf_names[qtype]) | |
1047 | kfree(qf_names[qtype]); | |
1048 | qf_names[qtype] = NULL; | |
bd4c625c | 1049 | } |
1da177e4 | 1050 | } |
bd4c625c LT |
1051 | if (c == 'f') { |
1052 | if (!strcmp(arg, "vfsold")) | |
00b44197 | 1053 | *qfmt = QFMT_VFS_OLD; |
bd4c625c | 1054 | else if (!strcmp(arg, "vfsv0")) |
00b44197 | 1055 | *qfmt = QFMT_VFS_V0; |
bd4c625c | 1056 | else { |
45b03d5e JM |
1057 | reiserfs_warning(s, "super-6514", |
1058 | "unknown quota format " | |
1059 | "specified."); | |
bd4c625c LT |
1060 | return 0; |
1061 | } | |
6929f891 | 1062 | if (sb_any_quota_loaded(s) && |
00b44197 | 1063 | *qfmt != REISERFS_SB(s)->s_jquota_fmt) { |
45b03d5e JM |
1064 | reiserfs_warning(s, "super-6515", |
1065 | "cannot change journaled " | |
1066 | "quota options when quota " | |
1067 | "turned on."); | |
00b44197 JK |
1068 | return 0; |
1069 | } | |
1da177e4 | 1070 | } |
bd4c625c LT |
1071 | #else |
1072 | if (c == 'u' || c == 'g' || c == 'f') { | |
45b03d5e JM |
1073 | reiserfs_warning(s, "reiserfs-2503", "journaled " |
1074 | "quota options not supported."); | |
bd4c625c | 1075 | return 0; |
1da177e4 | 1076 | } |
bd4c625c LT |
1077 | #endif |
1078 | } | |
1079 | ||
1080 | #ifdef CONFIG_QUOTA | |
00b44197 JK |
1081 | if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
1082 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { | |
45b03d5e JM |
1083 | reiserfs_warning(s, "super-6515", |
1084 | "journaled quota format not specified."); | |
1da177e4 | 1085 | return 0; |
1da177e4 | 1086 | } |
bd4c625c LT |
1087 | /* This checking is not precise wrt the quota type but for our purposes it is sufficient */ |
1088 | if (!(*mount_options & (1 << REISERFS_QUOTA)) | |
6929f891 | 1089 | && sb_any_quota_loaded(s)) { |
45b03d5e JM |
1090 | reiserfs_warning(s, "super-6516", "quota options must " |
1091 | "be present when quota is turned on."); | |
bd4c625c | 1092 | return 0; |
1da177e4 LT |
1093 | } |
1094 | #endif | |
556a2a45 | 1095 | |
bd4c625c | 1096 | return 1; |
1da177e4 LT |
1097 | } |
1098 | ||
bd4c625c LT |
1099 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1100 | { | |
1101 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | | |
1102 | (1 << REISERFS_DATA_ORDERED) | | |
1103 | (1 << REISERFS_DATA_WRITEBACK)); | |
1104 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); | |
1da177e4 LT |
1105 | } |
1106 | ||
1107 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) | |
1108 | { | |
bd4c625c LT |
1109 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1110 | if (!reiserfs_data_log(s)) { | |
1111 | switch_data_mode(s, REISERFS_DATA_LOG); | |
1112 | reiserfs_info(s, "switching to journaled data mode\n"); | |
1113 | } | |
1114 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { | |
1115 | if (!reiserfs_data_ordered(s)) { | |
1116 | switch_data_mode(s, REISERFS_DATA_ORDERED); | |
1117 | reiserfs_info(s, "switching to ordered data mode\n"); | |
1118 | } | |
1119 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { | |
1120 | if (!reiserfs_data_writeback(s)) { | |
1121 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); | |
1122 | reiserfs_info(s, "switching to writeback data mode\n"); | |
1123 | } | |
1124 | } | |
1da177e4 LT |
1125 | } |
1126 | ||
bd4c625c LT |
1127 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1128 | { | |
1129 | int flush = (1 << REISERFS_BARRIER_FLUSH); | |
1130 | int none = (1 << REISERFS_BARRIER_NONE); | |
1131 | int all_barrier = flush | none; | |
1132 | ||
1133 | if (bits & all_barrier) { | |
1134 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; | |
1135 | if (bits & flush) { | |
1136 | REISERFS_SB(s)->s_mount_opt |= flush; | |
1137 | printk("reiserfs: enabling write barrier flush mode\n"); | |
1138 | } else if (bits & none) { | |
1139 | REISERFS_SB(s)->s_mount_opt |= none; | |
1140 | printk("reiserfs: write barriers turned off\n"); | |
1141 | } | |
1142 | } | |
1da177e4 LT |
1143 | } |
1144 | ||
bd4c625c | 1145 | static void handle_attrs(struct super_block *s) |
1da177e4 | 1146 | { |
bd4c625c | 1147 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1148 | |
bd4c625c LT |
1149 | if (reiserfs_attrs(s)) { |
1150 | if (old_format_only(s)) { | |
45b03d5e JM |
1151 | reiserfs_warning(s, "super-6517", "cannot support " |
1152 | "attributes on 3.5.x disk format"); | |
bd4c625c | 1153 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1154 | return; |
1155 | } | |
bd4c625c | 1156 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
45b03d5e JM |
1157 | reiserfs_warning(s, "super-6518", "cannot support " |
1158 | "attributes until flag is set in " | |
1159 | "super-block"); | |
bd4c625c | 1160 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1161 | } |
1162 | } | |
1163 | } | |
1164 | ||
00b44197 JK |
1165 | #ifdef CONFIG_QUOTA |
1166 | static void handle_quota_files(struct super_block *s, char **qf_names, | |
1167 | unsigned int *qfmt) | |
1168 | { | |
1169 | int i; | |
1170 | ||
1171 | for (i = 0; i < MAXQUOTAS; i++) { | |
1172 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1173 | kfree(REISERFS_SB(s)->s_qf_names[i]); | |
1174 | REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; | |
1175 | } | |
1176 | REISERFS_SB(s)->s_jquota_fmt = *qfmt; | |
1177 | } | |
1178 | #endif | |
1179 | ||
bd4c625c | 1180 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1da177e4 | 1181 | { |
bd4c625c LT |
1182 | struct reiserfs_super_block *rs; |
1183 | struct reiserfs_transaction_handle th; | |
1184 | unsigned long blocks; | |
1185 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; | |
1186 | unsigned long safe_mask = 0; | |
1187 | unsigned int commit_max_age = (unsigned int)-1; | |
1188 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
cdf6ccc8 | 1189 | char *new_opts = kstrdup(arg, GFP_KERNEL); |
bd4c625c | 1190 | int err; |
00b44197 JK |
1191 | char *qf_names[MAXQUOTAS]; |
1192 | unsigned int qfmt = 0; | |
1da177e4 | 1193 | #ifdef CONFIG_QUOTA |
bd4c625c | 1194 | int i; |
00b44197 JK |
1195 | |
1196 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); | |
1da177e4 LT |
1197 | #endif |
1198 | ||
bd4c625c | 1199 | rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1200 | |
bd4c625c | 1201 | if (!reiserfs_parse_options |
00b44197 JK |
1202 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
1203 | qf_names, &qfmt)) { | |
1da177e4 | 1204 | #ifdef CONFIG_QUOTA |
00b44197 JK |
1205 | for (i = 0; i < MAXQUOTAS; i++) |
1206 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1207 | kfree(qf_names[i]); | |
1da177e4 | 1208 | #endif |
cdf6ccc8 MS |
1209 | err = -EINVAL; |
1210 | goto out_err; | |
bd4c625c | 1211 | } |
00b44197 JK |
1212 | #ifdef CONFIG_QUOTA |
1213 | handle_quota_files(s, qf_names, &qfmt); | |
1214 | #endif | |
bd4c625c LT |
1215 | |
1216 | handle_attrs(s); | |
1217 | ||
1218 | /* Add options that are safe here */ | |
1219 | safe_mask |= 1 << REISERFS_SMALLTAIL; | |
1220 | safe_mask |= 1 << REISERFS_LARGETAIL; | |
1221 | safe_mask |= 1 << REISERFS_NO_BORDER; | |
1222 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; | |
1223 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; | |
1224 | safe_mask |= 1 << REISERFS_TEST4; | |
1225 | safe_mask |= 1 << REISERFS_ATTRS; | |
1226 | safe_mask |= 1 << REISERFS_XATTRS_USER; | |
1227 | safe_mask |= 1 << REISERFS_POSIXACL; | |
1228 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; | |
1229 | safe_mask |= 1 << REISERFS_BARRIER_NONE; | |
1230 | safe_mask |= 1 << REISERFS_ERROR_RO; | |
1231 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; | |
1232 | safe_mask |= 1 << REISERFS_ERROR_PANIC; | |
1233 | safe_mask |= 1 << REISERFS_QUOTA; | |
1234 | ||
1235 | /* Update the bitmask, taking care to keep | |
1236 | * the bits we're not allowed to change here */ | |
1237 | REISERFS_SB(s)->s_mount_opt = | |
1238 | (REISERFS_SB(s)-> | |
1239 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); | |
1240 | ||
1241 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { | |
1242 | journal->j_max_commit_age = commit_max_age; | |
1243 | journal->j_max_trans_age = commit_max_age; | |
1244 | } else if (commit_max_age == 0) { | |
1245 | /* 0 means restore defaults. */ | |
1246 | journal->j_max_commit_age = journal->j_default_max_commit_age; | |
1247 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
1248 | } | |
1249 | ||
1250 | if (blocks) { | |
cdf6ccc8 MS |
1251 | err = reiserfs_resize(s, blocks); |
1252 | if (err != 0) | |
1253 | goto out_err; | |
bd4c625c LT |
1254 | } |
1255 | ||
1256 | if (*mount_flags & MS_RDONLY) { | |
1257 | reiserfs_xattr_init(s, *mount_flags); | |
1258 | /* remount read-only */ | |
1259 | if (s->s_flags & MS_RDONLY) | |
1260 | /* it is read-only already */ | |
cdf6ccc8 | 1261 | goto out_ok; |
bd4c625c LT |
1262 | /* try to remount file system with read-only permissions */ |
1263 | if (sb_umount_state(rs) == REISERFS_VALID_FS | |
1264 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { | |
cdf6ccc8 | 1265 | goto out_ok; |
bd4c625c LT |
1266 | } |
1267 | ||
1268 | err = journal_begin(&th, s, 10); | |
1269 | if (err) | |
cdf6ccc8 | 1270 | goto out_err; |
bd4c625c LT |
1271 | |
1272 | /* Mounting a rw partition read-only. */ | |
1273 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1274 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); | |
1275 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1276 | } else { | |
1277 | /* remount read-write */ | |
1278 | if (!(s->s_flags & MS_RDONLY)) { | |
1279 | reiserfs_xattr_init(s, *mount_flags); | |
cdf6ccc8 | 1280 | goto out_ok; /* We are read-write already */ |
bd4c625c LT |
1281 | } |
1282 | ||
cdf6ccc8 MS |
1283 | if (reiserfs_is_journal_aborted(journal)) { |
1284 | err = journal->j_errno; | |
1285 | goto out_err; | |
1286 | } | |
bd4c625c LT |
1287 | |
1288 | handle_data_mode(s, mount_options); | |
1289 | handle_barrier_mode(s, mount_options); | |
1290 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1291 | s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ | |
1292 | err = journal_begin(&th, s, 10); | |
1293 | if (err) | |
cdf6ccc8 | 1294 | goto out_err; |
bd4c625c LT |
1295 | |
1296 | /* Mount a partition which is read-only, read-write */ | |
1297 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1298 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1299 | s->s_flags &= ~MS_RDONLY; | |
1300 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
702d21c6 JM |
1301 | if (!old_format_only(s)) |
1302 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
bd4c625c LT |
1303 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
1304 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1305 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; | |
1306 | } | |
1307 | /* this will force a full flush of all journal lists */ | |
1308 | SB_JOURNAL(s)->j_must_wait = 1; | |
1309 | err = journal_end(&th, s, 10); | |
1310 | if (err) | |
cdf6ccc8 | 1311 | goto out_err; |
bd4c625c LT |
1312 | s->s_dirt = 0; |
1313 | ||
1314 | if (!(*mount_flags & MS_RDONLY)) { | |
1315 | finish_unfinished(s); | |
1316 | reiserfs_xattr_init(s, *mount_flags); | |
1317 | } | |
1318 | ||
cdf6ccc8 MS |
1319 | out_ok: |
1320 | kfree(s->s_options); | |
1321 | s->s_options = new_opts; | |
bd4c625c | 1322 | return 0; |
cdf6ccc8 MS |
1323 | |
1324 | out_err: | |
1325 | kfree(new_opts); | |
1326 | return err; | |
1da177e4 LT |
1327 | } |
1328 | ||
bd4c625c | 1329 | static int read_super_block(struct super_block *s, int offset) |
1da177e4 | 1330 | { |
bd4c625c LT |
1331 | struct buffer_head *bh; |
1332 | struct reiserfs_super_block *rs; | |
1333 | int fs_blocksize; | |
1da177e4 | 1334 | |
bd4c625c LT |
1335 | bh = sb_bread(s, offset / s->s_blocksize); |
1336 | if (!bh) { | |
45b03d5e | 1337 | reiserfs_warning(s, "sh-2006", |
bd4c625c LT |
1338 | "bread failed (dev %s, block %lu, size %lu)", |
1339 | reiserfs_bdevname(s), offset / s->s_blocksize, | |
1340 | s->s_blocksize); | |
1341 | return 1; | |
1342 | } | |
1da177e4 | 1343 | |
bd4c625c LT |
1344 | rs = (struct reiserfs_super_block *)bh->b_data; |
1345 | if (!is_any_reiserfs_magic_string(rs)) { | |
1346 | brelse(bh); | |
1347 | return 1; | |
1348 | } | |
1349 | // | |
1350 | // ok, reiserfs signature (old or new) found in at the given offset | |
1351 | // | |
1352 | fs_blocksize = sb_blocksize(rs); | |
1353 | brelse(bh); | |
1354 | sb_set_blocksize(s, fs_blocksize); | |
1da177e4 | 1355 | |
bd4c625c LT |
1356 | bh = sb_bread(s, offset / s->s_blocksize); |
1357 | if (!bh) { | |
45b03d5e JM |
1358 | reiserfs_warning(s, "sh-2007", |
1359 | "bread failed (dev %s, block %lu, size %lu)", | |
bd4c625c LT |
1360 | reiserfs_bdevname(s), offset / s->s_blocksize, |
1361 | s->s_blocksize); | |
1362 | return 1; | |
1363 | } | |
1da177e4 | 1364 | |
bd4c625c LT |
1365 | rs = (struct reiserfs_super_block *)bh->b_data; |
1366 | if (sb_blocksize(rs) != s->s_blocksize) { | |
45b03d5e JM |
1367 | reiserfs_warning(s, "sh-2011", "can't find a reiserfs " |
1368 | "filesystem on (dev %s, block %Lu, size %lu)", | |
bd4c625c LT |
1369 | reiserfs_bdevname(s), |
1370 | (unsigned long long)bh->b_blocknr, | |
1371 | s->s_blocksize); | |
1372 | brelse(bh); | |
1373 | return 1; | |
1374 | } | |
1da177e4 | 1375 | |
bd4c625c LT |
1376 | if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { |
1377 | brelse(bh); | |
45b03d5e JM |
1378 | reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " |
1379 | "--rebuild-tree run detected. Please run\n" | |
1380 | "reiserfsck --rebuild-tree and wait for a " | |
1381 | "completion. If that fails\n" | |
bd4c625c LT |
1382 | "get newer reiserfsprogs package"); |
1383 | return 1; | |
1da177e4 | 1384 | } |
1da177e4 | 1385 | |
bd4c625c LT |
1386 | SB_BUFFER_WITH_SB(s) = bh; |
1387 | SB_DISK_SUPER_BLOCK(s) = rs; | |
1388 | ||
1389 | if (is_reiserfs_jr(rs)) { | |
1390 | /* magic is of non-standard journal filesystem, look at s_version to | |
1391 | find which format is in use */ | |
1392 | if (sb_version(rs) == REISERFS_VERSION_2) | |
1d889d99 JM |
1393 | reiserfs_info(s, "found reiserfs format \"3.6\"" |
1394 | " with non-standard journal\n"); | |
bd4c625c | 1395 | else if (sb_version(rs) == REISERFS_VERSION_1) |
1d889d99 JM |
1396 | reiserfs_info(s, "found reiserfs format \"3.5\"" |
1397 | " with non-standard journal\n"); | |
bd4c625c | 1398 | else { |
45b03d5e JM |
1399 | reiserfs_warning(s, "sh-2012", "found unknown " |
1400 | "format \"%u\" of reiserfs with " | |
1401 | "non-standard magic", sb_version(rs)); | |
bd4c625c LT |
1402 | return 1; |
1403 | } | |
1404 | } else | |
1405 | /* s_version of standard format may contain incorrect information, | |
1406 | so we just look at the magic string */ | |
1407 | reiserfs_info(s, | |
1408 | "found reiserfs format \"%s\" with standard journal\n", | |
1409 | is_reiserfs_3_5(rs) ? "3.5" : "3.6"); | |
1410 | ||
1411 | s->s_op = &reiserfs_sops; | |
1412 | s->s_export_op = &reiserfs_export_ops; | |
1da177e4 | 1413 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
1414 | s->s_qcop = &reiserfs_qctl_operations; |
1415 | s->dq_op = &reiserfs_quota_operations; | |
1da177e4 LT |
1416 | #endif |
1417 | ||
bd4c625c LT |
1418 | /* new format is limited by the 32 bit wide i_blocks field, want to |
1419 | ** be one full block below that. | |
1420 | */ | |
1421 | s->s_maxbytes = (512LL << 32) - s->s_blocksize; | |
1422 | return 0; | |
1da177e4 LT |
1423 | } |
1424 | ||
1da177e4 | 1425 | /* after journal replay, reread all bitmap and super blocks */ |
bd4c625c LT |
1426 | static int reread_meta_blocks(struct super_block *s) |
1427 | { | |
bd4c625c LT |
1428 | ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))); |
1429 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); | |
1430 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { | |
45b03d5e | 1431 | reiserfs_warning(s, "reiserfs-2504", "error reading the super"); |
bd4c625c LT |
1432 | return 1; |
1433 | } | |
1da177e4 | 1434 | |
bd4c625c | 1435 | return 0; |
bd4c625c | 1436 | } |
1da177e4 LT |
1437 | |
1438 | ///////////////////////////////////////////////////// | |
1439 | // hash detection stuff | |
1440 | ||
1da177e4 LT |
1441 | // if root directory is empty - we set default - Yura's - hash and |
1442 | // warn about it | |
1443 | // FIXME: we look for only one name in a directory. If tea and yura | |
1444 | // bith have the same value - we ask user to send report to the | |
1445 | // mailing list | |
bd4c625c | 1446 | static __u32 find_hash_out(struct super_block *s) |
1da177e4 | 1447 | { |
bd4c625c LT |
1448 | int retval; |
1449 | struct inode *inode; | |
1450 | struct cpu_key key; | |
1451 | INITIALIZE_PATH(path); | |
1452 | struct reiserfs_dir_entry de; | |
1453 | __u32 hash = DEFAULT_HASH; | |
1454 | ||
1455 | inode = s->s_root->d_inode; | |
1456 | ||
1457 | do { // Some serious "goto"-hater was there ;) | |
1458 | u32 teahash, r5hash, yurahash; | |
1459 | ||
1460 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); | |
1461 | retval = search_by_entry_key(s, &key, &path, &de); | |
1462 | if (retval == IO_ERROR) { | |
1463 | pathrelse(&path); | |
1464 | return UNSET_HASH; | |
1465 | } | |
1466 | if (retval == NAME_NOT_FOUND) | |
1467 | de.de_entry_num--; | |
1468 | set_de_name_and_namelen(&de); | |
1469 | if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) { | |
1470 | /* allow override in this case */ | |
1471 | if (reiserfs_rupasov_hash(s)) { | |
1472 | hash = YURA_HASH; | |
1473 | } | |
1d889d99 JM |
1474 | reiserfs_info(s, "FS seems to be empty, autodetect " |
1475 | "is using the default hash\n"); | |
bd4c625c LT |
1476 | break; |
1477 | } | |
1478 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); | |
1479 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); | |
1480 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); | |
1481 | if (((teahash == r5hash) | |
1482 | && | |
1483 | (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) | |
1484 | == r5hash)) || ((teahash == yurahash) | |
1485 | && (yurahash == | |
1486 | GET_HASH_VALUE(deh_offset | |
1487 | (& | |
1488 | (de. | |
1489 | de_deh[de. | |
1490 | de_entry_num]))))) | |
1491 | || ((r5hash == yurahash) | |
1492 | && (yurahash == | |
1493 | GET_HASH_VALUE(deh_offset | |
1494 | (&(de.de_deh[de.de_entry_num])))))) { | |
45b03d5e JM |
1495 | reiserfs_warning(s, "reiserfs-2506", "Unable to " |
1496 | "automatically detect hash function. " | |
1497 | "Please mount with -o " | |
1498 | "hash={tea,rupasov,r5}"); | |
bd4c625c LT |
1499 | hash = UNSET_HASH; |
1500 | break; | |
1501 | } | |
1502 | if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) == | |
1503 | yurahash) | |
1504 | hash = YURA_HASH; | |
1505 | else if (GET_HASH_VALUE | |
1506 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) | |
1507 | hash = TEA_HASH; | |
1508 | else if (GET_HASH_VALUE | |
1509 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) | |
1510 | hash = R5_HASH; | |
1511 | else { | |
45b03d5e JM |
1512 | reiserfs_warning(s, "reiserfs-2506", |
1513 | "Unrecognised hash function"); | |
bd4c625c LT |
1514 | hash = UNSET_HASH; |
1515 | } | |
1516 | } while (0); | |
1517 | ||
1518 | pathrelse(&path); | |
1519 | return hash; | |
1da177e4 LT |
1520 | } |
1521 | ||
1522 | // finds out which hash names are sorted with | |
bd4c625c | 1523 | static int what_hash(struct super_block *s) |
1da177e4 | 1524 | { |
bd4c625c LT |
1525 | __u32 code; |
1526 | ||
1527 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); | |
1528 | ||
1529 | /* reiserfs_hash_detect() == true if any of the hash mount options | |
1530 | ** were used. We must check them to make sure the user isn't | |
1531 | ** using a bad hash value | |
1532 | */ | |
1533 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) | |
1534 | code = find_hash_out(s); | |
1535 | ||
1536 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { | |
1537 | /* detection has found the hash, and we must check against the | |
1538 | ** mount options | |
1539 | */ | |
1540 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { | |
45b03d5e JM |
1541 | reiserfs_warning(s, "reiserfs-2507", |
1542 | "Error, %s hash detected, " | |
bd4c625c LT |
1543 | "unable to force rupasov hash", |
1544 | reiserfs_hashname(code)); | |
1545 | code = UNSET_HASH; | |
1546 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { | |
45b03d5e JM |
1547 | reiserfs_warning(s, "reiserfs-2508", |
1548 | "Error, %s hash detected, " | |
bd4c625c LT |
1549 | "unable to force tea hash", |
1550 | reiserfs_hashname(code)); | |
1551 | code = UNSET_HASH; | |
1552 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { | |
45b03d5e JM |
1553 | reiserfs_warning(s, "reiserfs-2509", |
1554 | "Error, %s hash detected, " | |
bd4c625c LT |
1555 | "unable to force r5 hash", |
1556 | reiserfs_hashname(code)); | |
1557 | code = UNSET_HASH; | |
1558 | } | |
1559 | } else { | |
1560 | /* find_hash_out was not called or could not determine the hash */ | |
1561 | if (reiserfs_rupasov_hash(s)) { | |
1562 | code = YURA_HASH; | |
1563 | } else if (reiserfs_tea_hash(s)) { | |
1564 | code = TEA_HASH; | |
1565 | } else if (reiserfs_r5_hash(s)) { | |
1566 | code = R5_HASH; | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | /* if we are mounted RW, and we have a new valid hash code, update | |
1571 | ** the super | |
1572 | */ | |
1573 | if (code != UNSET_HASH && | |
1574 | !(s->s_flags & MS_RDONLY) && | |
1575 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { | |
1576 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); | |
1577 | } | |
1578 | return code; | |
1da177e4 LT |
1579 | } |
1580 | ||
1581 | // return pointer to appropriate function | |
bd4c625c | 1582 | static hashf_t hash_function(struct super_block *s) |
1da177e4 | 1583 | { |
bd4c625c LT |
1584 | switch (what_hash(s)) { |
1585 | case TEA_HASH: | |
1586 | reiserfs_info(s, "Using tea hash to sort names\n"); | |
1587 | return keyed_hash; | |
1588 | case YURA_HASH: | |
1589 | reiserfs_info(s, "Using rupasov hash to sort names\n"); | |
1590 | return yura_hash; | |
1591 | case R5_HASH: | |
1592 | reiserfs_info(s, "Using r5 hash to sort names\n"); | |
1593 | return r5_hash; | |
1594 | } | |
1595 | return NULL; | |
1da177e4 LT |
1596 | } |
1597 | ||
1598 | // this is used to set up correct value for old partitions | |
bd4c625c | 1599 | static int function2code(hashf_t func) |
1da177e4 | 1600 | { |
bd4c625c LT |
1601 | if (func == keyed_hash) |
1602 | return TEA_HASH; | |
1603 | if (func == yura_hash) | |
1604 | return YURA_HASH; | |
1605 | if (func == r5_hash) | |
1606 | return R5_HASH; | |
1da177e4 | 1607 | |
bd4c625c | 1608 | BUG(); // should never happen |
1da177e4 | 1609 | |
bd4c625c | 1610 | return 0; |
1da177e4 LT |
1611 | } |
1612 | ||
45b03d5e | 1613 | #define SWARN(silent, s, id, ...) \ |
1da177e4 | 1614 | if (!(silent)) \ |
45b03d5e | 1615 | reiserfs_warning(s, id, __VA_ARGS__) |
1da177e4 | 1616 | |
bd4c625c | 1617 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1da177e4 | 1618 | { |
bd4c625c | 1619 | struct inode *root_inode; |
bd4c625c LT |
1620 | struct reiserfs_transaction_handle th; |
1621 | int old_format = 0; | |
1622 | unsigned long blocks; | |
1623 | unsigned int commit_max_age = 0; | |
1624 | int jinit_done = 0; | |
1625 | struct reiserfs_iget_args args; | |
1626 | struct reiserfs_super_block *rs; | |
1627 | char *jdev_name; | |
1628 | struct reiserfs_sb_info *sbi; | |
1629 | int errval = -EINVAL; | |
00b44197 JK |
1630 | char *qf_names[MAXQUOTAS] = {}; |
1631 | unsigned int qfmt = 0; | |
bd4c625c | 1632 | |
cdf6ccc8 MS |
1633 | save_mount_options(s, data); |
1634 | ||
01afb213 | 1635 | sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
bd4c625c LT |
1636 | if (!sbi) { |
1637 | errval = -ENOMEM; | |
1638 | goto error; | |
1639 | } | |
1640 | s->s_fs_info = sbi; | |
bd4c625c LT |
1641 | /* Set default values for options: non-aggressive tails, RO on errors */ |
1642 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); | |
1643 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); | |
1644 | /* no preallocation minimum, be smart in | |
1645 | reiserfs_file_write instead */ | |
1646 | REISERFS_SB(s)->s_alloc_options.preallocmin = 0; | |
1647 | /* Preallocate by 16 blocks (17-1) at once */ | |
1648 | REISERFS_SB(s)->s_alloc_options.preallocsize = 17; | |
bd4c625c LT |
1649 | /* setup default block allocator options */ |
1650 | reiserfs_init_alloc_options(s); | |
1651 | ||
1652 | jdev_name = NULL; | |
1653 | if (reiserfs_parse_options | |
1654 | (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name, | |
00b44197 | 1655 | &commit_max_age, qf_names, &qfmt) == 0) { |
bd4c625c LT |
1656 | goto error; |
1657 | } | |
00b44197 JK |
1658 | #ifdef CONFIG_QUOTA |
1659 | handle_quota_files(s, qf_names, &qfmt); | |
1660 | #endif | |
bd4c625c LT |
1661 | |
1662 | if (blocks) { | |
45b03d5e | 1663 | SWARN(silent, s, "jmacd-7", "resize option for remount only"); |
bd4c625c LT |
1664 | goto error; |
1665 | } | |
1666 | ||
1667 | /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ | |
1668 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) | |
1669 | old_format = 1; | |
1670 | /* try new format (64-th 1k block), which can contain reiserfs super block */ | |
1671 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { | |
45b03d5e | 1672 | SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", |
bd4c625c LT |
1673 | reiserfs_bdevname(s)); |
1674 | goto error; | |
1675 | } | |
1676 | ||
1677 | rs = SB_DISK_SUPER_BLOCK(s); | |
1678 | /* Let's do basic sanity check to verify that underlying device is not | |
1679 | smaller than the filesystem. If the check fails then abort and scream, | |
1680 | because bad stuff will happen otherwise. */ | |
1681 | if (s->s_bdev && s->s_bdev->bd_inode | |
1682 | && i_size_read(s->s_bdev->bd_inode) < | |
1683 | sb_block_count(rs) * sb_blocksize(rs)) { | |
45b03d5e JM |
1684 | SWARN(silent, s, "", "Filesystem cannot be " |
1685 | "mounted because it is bigger than the device"); | |
1686 | SWARN(silent, s, "", "You may need to run fsck " | |
1687 | "or increase size of your LVM partition"); | |
1688 | SWARN(silent, s, "", "Or may be you forgot to " | |
1689 | "reboot after fdisk when it told you to"); | |
bd4c625c LT |
1690 | goto error; |
1691 | } | |
1692 | ||
1693 | sbi->s_mount_state = SB_REISERFS_STATE(s); | |
1694 | sbi->s_mount_state = REISERFS_VALID_FS; | |
1695 | ||
6f01046b | 1696 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
45b03d5e | 1697 | SWARN(silent, s, "jmacd-8", "unable to read bitmap"); |
bd4c625c LT |
1698 | goto error; |
1699 | } | |
d2c89a42 | 1700 | errval = -EINVAL; |
1da177e4 | 1701 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1702 | SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); |
1703 | SWARN(silent, s, "", "- it is slow mode for debugging."); | |
1da177e4 LT |
1704 | #endif |
1705 | ||
bd4c625c LT |
1706 | /* make data=ordered the default */ |
1707 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && | |
1708 | !reiserfs_data_writeback(s)) { | |
1709 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); | |
1710 | } | |
1711 | ||
1712 | if (reiserfs_data_log(s)) { | |
1713 | reiserfs_info(s, "using journaled data mode\n"); | |
1714 | } else if (reiserfs_data_ordered(s)) { | |
1715 | reiserfs_info(s, "using ordered data mode\n"); | |
1716 | } else { | |
1717 | reiserfs_info(s, "using writeback data mode\n"); | |
1718 | } | |
1719 | if (reiserfs_barrier_flush(s)) { | |
1720 | printk("reiserfs: using flush barriers\n"); | |
1721 | } | |
1722 | // set_device_ro(s->s_dev, 1) ; | |
1723 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { | |
45b03d5e JM |
1724 | SWARN(silent, s, "sh-2022", |
1725 | "unable to initialize journal space"); | |
bd4c625c LT |
1726 | goto error; |
1727 | } else { | |
1728 | jinit_done = 1; /* once this is set, journal_release must be called | |
1729 | ** if we error out of the mount | |
1730 | */ | |
1731 | } | |
1732 | if (reread_meta_blocks(s)) { | |
45b03d5e JM |
1733 | SWARN(silent, s, "jmacd-9", |
1734 | "unable to reread meta blocks after journal init"); | |
bd4c625c LT |
1735 | goto error; |
1736 | } | |
1737 | ||
1738 | if (replay_only(s)) | |
1739 | goto error; | |
1740 | ||
1741 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { | |
45b03d5e JM |
1742 | SWARN(silent, s, "clm-7000", |
1743 | "Detected readonly device, marking FS readonly"); | |
bd4c625c LT |
1744 | s->s_flags |= MS_RDONLY; |
1745 | } | |
1746 | args.objectid = REISERFS_ROOT_OBJECTID; | |
1747 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; | |
1748 | root_inode = | |
1749 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, | |
1750 | reiserfs_init_locked_inode, (void *)(&args)); | |
1751 | if (!root_inode) { | |
45b03d5e | 1752 | SWARN(silent, s, "jmacd-10", "get root inode failed"); |
bd4c625c LT |
1753 | goto error; |
1754 | } | |
1755 | ||
1756 | if (root_inode->i_state & I_NEW) { | |
1757 | reiserfs_read_locked_inode(root_inode, &args); | |
1758 | unlock_new_inode(root_inode); | |
1759 | } | |
1760 | ||
1761 | s->s_root = d_alloc_root(root_inode); | |
1762 | if (!s->s_root) { | |
1763 | iput(root_inode); | |
1764 | goto error; | |
1765 | } | |
1766 | // define and initialize hash function | |
1767 | sbi->s_hash_function = hash_function(s); | |
1768 | if (sbi->s_hash_function == NULL) { | |
1769 | dput(s->s_root); | |
1770 | s->s_root = NULL; | |
1771 | goto error; | |
1772 | } | |
1773 | ||
1774 | if (is_reiserfs_3_5(rs) | |
1775 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) | |
1776 | set_bit(REISERFS_3_5, &(sbi->s_properties)); | |
e1fabd3c JM |
1777 | else if (old_format) |
1778 | set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties)); | |
bd4c625c LT |
1779 | else |
1780 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1781 | ||
1782 | if (!(s->s_flags & MS_RDONLY)) { | |
1783 | ||
1784 | errval = journal_begin(&th, s, 1); | |
1785 | if (errval) { | |
1786 | dput(s->s_root); | |
1787 | s->s_root = NULL; | |
1788 | goto error; | |
1789 | } | |
1790 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1791 | ||
1792 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
1793 | set_sb_fs_state(rs, 0); | |
1794 | ||
cb680c1b JM |
1795 | /* Clear out s_bmap_nr if it would wrap. We can handle this |
1796 | * case, but older revisions can't. This will cause the | |
1797 | * file system to fail mount on those older implementations, | |
1798 | * avoiding corruption. -jeffm */ | |
1799 | if (bmap_would_wrap(reiserfs_bmap_count(s)) && | |
1800 | sb_bmap_nr(rs) != 0) { | |
45b03d5e | 1801 | reiserfs_warning(s, "super-2030", "This file system " |
cb680c1b JM |
1802 | "claims to use %u bitmap blocks in " |
1803 | "its super block, but requires %u. " | |
1804 | "Clearing to zero.", sb_bmap_nr(rs), | |
1805 | reiserfs_bmap_count(s)); | |
1806 | ||
1807 | set_sb_bmap_nr(rs, 0); | |
1808 | } | |
1809 | ||
bd4c625c LT |
1810 | if (old_format_only(s)) { |
1811 | /* filesystem of format 3.5 either with standard or non-standard | |
1812 | journal */ | |
1813 | if (convert_reiserfs(s)) { | |
1814 | /* and -o conv is given */ | |
1815 | if (!silent) | |
1816 | reiserfs_info(s, | |
1817 | "converting 3.5 filesystem to the 3.6 format"); | |
1818 | ||
1819 | if (is_reiserfs_3_5(rs)) | |
1820 | /* put magic string of 3.6 format. 2.2 will not be able to | |
1821 | mount this filesystem anymore */ | |
1822 | memcpy(rs->s_v1.s_magic, | |
1823 | reiserfs_3_6_magic_string, | |
1824 | sizeof | |
1825 | (reiserfs_3_6_magic_string)); | |
1826 | ||
1827 | set_sb_version(rs, REISERFS_VERSION_2); | |
1828 | reiserfs_convert_objectid_map_v1(s); | |
1829 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1830 | clear_bit(REISERFS_3_5, &(sbi->s_properties)); | |
1831 | } else if (!silent) { | |
1832 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
1833 | } | |
702d21c6 JM |
1834 | } else |
1835 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
1836 | ||
bd4c625c LT |
1837 | |
1838 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1839 | errval = journal_end(&th, s, 1); | |
1840 | if (errval) { | |
1841 | dput(s->s_root); | |
1842 | s->s_root = NULL; | |
1843 | goto error; | |
1844 | } | |
1845 | ||
1846 | if ((errval = reiserfs_xattr_init(s, s->s_flags))) { | |
1847 | dput(s->s_root); | |
1848 | s->s_root = NULL; | |
1849 | goto error; | |
1850 | } | |
1851 | ||
1852 | /* look for files which were to be removed in previous session */ | |
1853 | finish_unfinished(s); | |
1854 | } else { | |
1855 | if (old_format_only(s) && !silent) { | |
1856 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
1857 | } | |
1858 | ||
1859 | if ((errval = reiserfs_xattr_init(s, s->s_flags))) { | |
1860 | dput(s->s_root); | |
1861 | s->s_root = NULL; | |
1862 | goto error; | |
1863 | } | |
1864 | } | |
1865 | // mark hash in super block: it could be unset. overwrite should be ok | |
1866 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); | |
1867 | ||
1868 | handle_attrs(s); | |
1869 | ||
1870 | reiserfs_proc_info_init(s); | |
1871 | ||
1872 | init_waitqueue_head(&(sbi->s_wait)); | |
1873 | spin_lock_init(&sbi->bitmap_lock); | |
1874 | ||
1875 | return (0); | |
1876 | ||
00b44197 | 1877 | error: |
bd4c625c LT |
1878 | if (jinit_done) { /* kill the commit thread, free journal ram */ |
1879 | journal_release_error(NULL, s); | |
1880 | } | |
5065227b JM |
1881 | |
1882 | reiserfs_free_bitmap_cache(s); | |
bd4c625c LT |
1883 | if (SB_BUFFER_WITH_SB(s)) |
1884 | brelse(SB_BUFFER_WITH_SB(s)); | |
1da177e4 | 1885 | #ifdef CONFIG_QUOTA |
5065227b JM |
1886 | { |
1887 | int j; | |
00b44197 JK |
1888 | for (j = 0; j < MAXQUOTAS; j++) |
1889 | kfree(qf_names[j]); | |
bd4c625c | 1890 | } |
1da177e4 | 1891 | #endif |
833d304b | 1892 | kfree(sbi); |
1da177e4 | 1893 | |
bd4c625c LT |
1894 | s->s_fs_info = NULL; |
1895 | return errval; | |
1da177e4 LT |
1896 | } |
1897 | ||
726c3342 | 1898 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1899 | { |
726c3342 | 1900 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
bd4c625c LT |
1901 | |
1902 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); | |
1903 | buf->f_bfree = sb_free_blocks(rs); | |
1904 | buf->f_bavail = buf->f_bfree; | |
1905 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; | |
726c3342 | 1906 | buf->f_bsize = dentry->d_sb->s_blocksize; |
bd4c625c LT |
1907 | /* changed to accommodate gcc folks. */ |
1908 | buf->f_type = REISERFS_SUPER_MAGIC; | |
1909 | return 0; | |
1da177e4 LT |
1910 | } |
1911 | ||
1912 | #ifdef CONFIG_QUOTA | |
1913 | static int reiserfs_dquot_initialize(struct inode *inode, int type) | |
1914 | { | |
bd4c625c LT |
1915 | struct reiserfs_transaction_handle th; |
1916 | int ret, err; | |
1917 | ||
1918 | /* We may create quota structure so we need to reserve enough blocks */ | |
1919 | reiserfs_write_lock(inode->i_sb); | |
1920 | ret = | |
1921 | journal_begin(&th, inode->i_sb, | |
1922 | 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb)); | |
1923 | if (ret) | |
1924 | goto out; | |
1925 | ret = dquot_initialize(inode, type); | |
1926 | err = | |
1927 | journal_end(&th, inode->i_sb, | |
1928 | 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb)); | |
1929 | if (!ret && err) | |
1930 | ret = err; | |
1931 | out: | |
1932 | reiserfs_write_unlock(inode->i_sb); | |
1933 | return ret; | |
1da177e4 LT |
1934 | } |
1935 | ||
1936 | static int reiserfs_dquot_drop(struct inode *inode) | |
1937 | { | |
bd4c625c LT |
1938 | struct reiserfs_transaction_handle th; |
1939 | int ret, err; | |
1940 | ||
1941 | /* We may delete quota structure so we need to reserve enough blocks */ | |
1942 | reiserfs_write_lock(inode->i_sb); | |
1943 | ret = | |
1944 | journal_begin(&th, inode->i_sb, | |
1945 | 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)); | |
a2fe594f JK |
1946 | if (ret) { |
1947 | /* | |
1948 | * We call dquot_drop() anyway to at least release references | |
1949 | * to quota structures so that umount does not hang. | |
1950 | */ | |
1951 | dquot_drop(inode); | |
bd4c625c | 1952 | goto out; |
a2fe594f | 1953 | } |
bd4c625c LT |
1954 | ret = dquot_drop(inode); |
1955 | err = | |
1956 | journal_end(&th, inode->i_sb, | |
1957 | 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)); | |
1958 | if (!ret && err) | |
1959 | ret = err; | |
1960 | out: | |
1961 | reiserfs_write_unlock(inode->i_sb); | |
1962 | return ret; | |
1da177e4 LT |
1963 | } |
1964 | ||
1965 | static int reiserfs_write_dquot(struct dquot *dquot) | |
1966 | { | |
bd4c625c LT |
1967 | struct reiserfs_transaction_handle th; |
1968 | int ret, err; | |
1969 | ||
1970 | reiserfs_write_lock(dquot->dq_sb); | |
1971 | ret = | |
1972 | journal_begin(&th, dquot->dq_sb, | |
1973 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
1974 | if (ret) | |
1975 | goto out; | |
1976 | ret = dquot_commit(dquot); | |
1977 | err = | |
1978 | journal_end(&th, dquot->dq_sb, | |
1979 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
1980 | if (!ret && err) | |
1981 | ret = err; | |
1982 | out: | |
1983 | reiserfs_write_unlock(dquot->dq_sb); | |
1984 | return ret; | |
1da177e4 LT |
1985 | } |
1986 | ||
1987 | static int reiserfs_acquire_dquot(struct dquot *dquot) | |
1988 | { | |
bd4c625c LT |
1989 | struct reiserfs_transaction_handle th; |
1990 | int ret, err; | |
1991 | ||
1992 | reiserfs_write_lock(dquot->dq_sb); | |
1993 | ret = | |
1994 | journal_begin(&th, dquot->dq_sb, | |
1995 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
1996 | if (ret) | |
1997 | goto out; | |
1998 | ret = dquot_acquire(dquot); | |
1999 | err = | |
2000 | journal_end(&th, dquot->dq_sb, | |
2001 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
2002 | if (!ret && err) | |
2003 | ret = err; | |
2004 | out: | |
2005 | reiserfs_write_unlock(dquot->dq_sb); | |
2006 | return ret; | |
1da177e4 LT |
2007 | } |
2008 | ||
2009 | static int reiserfs_release_dquot(struct dquot *dquot) | |
2010 | { | |
bd4c625c LT |
2011 | struct reiserfs_transaction_handle th; |
2012 | int ret, err; | |
2013 | ||
2014 | reiserfs_write_lock(dquot->dq_sb); | |
2015 | ret = | |
2016 | journal_begin(&th, dquot->dq_sb, | |
2017 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
2018 | if (ret) { |
2019 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2020 | dquot_release(dquot); | |
bd4c625c | 2021 | goto out; |
9c3013e9 | 2022 | } |
bd4c625c LT |
2023 | ret = dquot_release(dquot); |
2024 | err = | |
2025 | journal_end(&th, dquot->dq_sb, | |
2026 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
2027 | if (!ret && err) | |
2028 | ret = err; | |
2029 | out: | |
2030 | reiserfs_write_unlock(dquot->dq_sb); | |
2031 | return ret; | |
1da177e4 LT |
2032 | } |
2033 | ||
2034 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) | |
2035 | { | |
4506567b | 2036 | /* Are we journaling quotas? */ |
bd4c625c LT |
2037 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2038 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2039 | dquot_mark_dquot_dirty(dquot); | |
2040 | return reiserfs_write_dquot(dquot); | |
2041 | } else | |
2042 | return dquot_mark_dquot_dirty(dquot); | |
1da177e4 LT |
2043 | } |
2044 | ||
2045 | static int reiserfs_write_info(struct super_block *sb, int type) | |
2046 | { | |
bd4c625c LT |
2047 | struct reiserfs_transaction_handle th; |
2048 | int ret, err; | |
2049 | ||
2050 | /* Data block + inode block */ | |
2051 | reiserfs_write_lock(sb); | |
2052 | ret = journal_begin(&th, sb, 2); | |
2053 | if (ret) | |
2054 | goto out; | |
2055 | ret = dquot_commit_info(sb, type); | |
2056 | err = journal_end(&th, sb, 2); | |
2057 | if (!ret && err) | |
2058 | ret = err; | |
2059 | out: | |
2060 | reiserfs_write_unlock(sb); | |
2061 | return ret; | |
1da177e4 LT |
2062 | } |
2063 | ||
2064 | /* | |
84de856e | 2065 | * Turn on quotas during mount time - we need to find the quota file and such... |
1da177e4 LT |
2066 | */ |
2067 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) | |
2068 | { | |
84de856e | 2069 | return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
bd4c625c | 2070 | REISERFS_SB(sb)->s_jquota_fmt, type); |
1da177e4 LT |
2071 | } |
2072 | ||
2073 | /* | |
2074 | * Standard function to be called on quota_on | |
2075 | */ | |
bd4c625c | 2076 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 2077 | char *name, int remount) |
1da177e4 | 2078 | { |
bd4c625c | 2079 | int err; |
8264613d | 2080 | struct path path; |
d5dee5c3 | 2081 | struct inode *inode; |
5d4f7fdd | 2082 | struct reiserfs_transaction_handle th; |
bd4c625c LT |
2083 | |
2084 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA))) | |
2085 | return -EINVAL; | |
1b445a9c JK |
2086 | /* No more checks needed? Path and format_id are bogus anyway... */ |
2087 | if (remount) | |
8264613d AV |
2088 | return vfs_quota_on(sb, type, format_id, name, 1); |
2089 | err = kern_path(name, LOOKUP_FOLLOW, &path); | |
bd4c625c LT |
2090 | if (err) |
2091 | return err; | |
2092 | /* Quotafile not on the same filesystem? */ | |
8264613d | 2093 | if (path.mnt->mnt_sb != sb) { |
77e69dac AV |
2094 | err = -EXDEV; |
2095 | goto out; | |
bd4c625c | 2096 | } |
8264613d | 2097 | inode = path.dentry->d_inode; |
bd4c625c | 2098 | /* We must not pack tails for quota files on reiserfs for quota IO to work */ |
d5dee5c3 JK |
2099 | if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { |
2100 | err = reiserfs_unpack(inode, NULL); | |
2101 | if (err) { | |
45b03d5e JM |
2102 | reiserfs_warning(sb, "super-6520", |
2103 | "Unpacking tail of quota file failed" | |
d5dee5c3 | 2104 | " (%d). Cannot turn on quotas.", err); |
77e69dac AV |
2105 | err = -EINVAL; |
2106 | goto out; | |
d5dee5c3 JK |
2107 | } |
2108 | mark_inode_dirty(inode); | |
bd4c625c | 2109 | } |
5d4f7fdd JK |
2110 | /* Journaling quota? */ |
2111 | if (REISERFS_SB(sb)->s_qf_names[type]) { | |
2112 | /* Quotafile not of fs root? */ | |
8264613d | 2113 | if (path.dentry->d_parent != sb->s_root) |
45b03d5e JM |
2114 | reiserfs_warning(sb, "super-6521", |
2115 | "Quota file not on filesystem root. " | |
bd4c625c | 2116 | "Journalled quota will not work."); |
5d4f7fdd JK |
2117 | } |
2118 | ||
2119 | /* | |
2120 | * When we journal data on quota file, we have to flush journal to see | |
2121 | * all updates to the file when we bypass pagecache... | |
2122 | */ | |
2123 | if (reiserfs_file_data_log(inode)) { | |
2124 | /* Just start temporary transaction and finish it */ | |
2125 | err = journal_begin(&th, sb, 1); | |
2126 | if (err) | |
77e69dac | 2127 | goto out; |
5d4f7fdd JK |
2128 | err = journal_end_sync(&th, sb, 1); |
2129 | if (err) | |
77e69dac | 2130 | goto out; |
5d4f7fdd | 2131 | } |
8264613d | 2132 | err = vfs_quota_on_path(sb, type, format_id, &path); |
77e69dac | 2133 | out: |
8264613d | 2134 | path_put(&path); |
77e69dac | 2135 | return err; |
1da177e4 LT |
2136 | } |
2137 | ||
2138 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2139 | * acquiring the locks... As quota files are never truncated and quota code | |
2140 | * itself serializes the operations (and noone else should touch the files) | |
2141 | * we don't have to be afraid of races */ | |
2142 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, | |
2143 | size_t len, loff_t off) | |
2144 | { | |
bd4c625c LT |
2145 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2146 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2147 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2148 | size_t toread; | |
2149 | struct buffer_head tmp_bh, *bh; | |
2150 | loff_t i_size = i_size_read(inode); | |
2151 | ||
2152 | if (off > i_size) | |
2153 | return 0; | |
2154 | if (off + len > i_size) | |
2155 | len = i_size - off; | |
2156 | toread = len; | |
2157 | while (toread > 0) { | |
2158 | tocopy = | |
2159 | sb->s_blocksize - offset < | |
2160 | toread ? sb->s_blocksize - offset : toread; | |
2161 | tmp_bh.b_state = 0; | |
2162 | /* Quota files are without tails so we can safely use this function */ | |
2163 | reiserfs_write_lock(sb); | |
2164 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); | |
2165 | reiserfs_write_unlock(sb); | |
2166 | if (err) | |
2167 | return err; | |
2168 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
2169 | memset(data, 0, tocopy); | |
2170 | else { | |
2171 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2172 | if (!bh) | |
2173 | return -EIO; | |
2174 | memcpy(data, bh->b_data + offset, tocopy); | |
2175 | brelse(bh); | |
2176 | } | |
2177 | offset = 0; | |
2178 | toread -= tocopy; | |
2179 | data += tocopy; | |
2180 | blk++; | |
2181 | } | |
2182 | return len; | |
1da177e4 LT |
2183 | } |
2184 | ||
2185 | /* Write to quotafile (we know the transaction is already started and has | |
2186 | * enough credits) */ | |
2187 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, | |
2188 | const char *data, size_t len, loff_t off) | |
2189 | { | |
bd4c625c LT |
2190 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2191 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2192 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2193 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; | |
2194 | size_t towrite = len; | |
2195 | struct buffer_head tmp_bh, *bh; | |
2196 | ||
9c3013e9 JK |
2197 | if (!current->journal_info) { |
2198 | printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)" | |
2199 | " cancelled because transaction is not started.\n", | |
2200 | (unsigned long long)off, (unsigned long long)len); | |
2201 | return -EIO; | |
2202 | } | |
5c81a419 | 2203 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
bd4c625c LT |
2204 | while (towrite > 0) { |
2205 | tocopy = sb->s_blocksize - offset < towrite ? | |
2206 | sb->s_blocksize - offset : towrite; | |
2207 | tmp_bh.b_state = 0; | |
2208 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); | |
2209 | if (err) | |
2210 | goto out; | |
2211 | if (offset || tocopy != sb->s_blocksize) | |
2212 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2213 | else | |
2214 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
2215 | if (!bh) { | |
2216 | err = -EIO; | |
2217 | goto out; | |
2218 | } | |
2219 | lock_buffer(bh); | |
2220 | memcpy(bh->b_data + offset, data, tocopy); | |
2221 | flush_dcache_page(bh->b_page); | |
2222 | set_buffer_uptodate(bh); | |
2223 | unlock_buffer(bh); | |
2224 | reiserfs_prepare_for_journal(sb, bh, 1); | |
2225 | journal_mark_dirty(current->journal_info, sb, bh); | |
2226 | if (!journal_quota) | |
2227 | reiserfs_add_ordered_list(inode, bh); | |
2228 | brelse(bh); | |
2229 | offset = 0; | |
2230 | towrite -= tocopy; | |
2231 | data += tocopy; | |
2232 | blk++; | |
2233 | } | |
9c3013e9 | 2234 | out: |
10dd08dc JK |
2235 | if (len == towrite) { |
2236 | mutex_unlock(&inode->i_mutex); | |
bd4c625c | 2237 | return err; |
10dd08dc | 2238 | } |
bd4c625c LT |
2239 | if (inode->i_size < off + len - towrite) |
2240 | i_size_write(inode, off + len - towrite); | |
2241 | inode->i_version++; | |
2242 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2243 | mark_inode_dirty(inode); | |
1b1dcc1b | 2244 | mutex_unlock(&inode->i_mutex); |
bd4c625c | 2245 | return len - towrite; |
1da177e4 LT |
2246 | } |
2247 | ||
2248 | #endif | |
2249 | ||
454e2398 DH |
2250 | static int get_super_block(struct file_system_type *fs_type, |
2251 | int flags, const char *dev_name, | |
2252 | void *data, struct vfsmount *mnt) | |
1da177e4 | 2253 | { |
454e2398 DH |
2254 | return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super, |
2255 | mnt); | |
1da177e4 LT |
2256 | } |
2257 | ||
bd4c625c | 2258 | static int __init init_reiserfs_fs(void) |
1da177e4 LT |
2259 | { |
2260 | int ret; | |
2261 | ||
bd4c625c | 2262 | if ((ret = init_inodecache())) { |
1da177e4 LT |
2263 | return ret; |
2264 | } | |
2265 | ||
bd4c625c LT |
2266 | reiserfs_proc_info_global_init(); |
2267 | reiserfs_proc_register_global("version", | |
2268 | reiserfs_global_version_in_proc); | |
1da177e4 | 2269 | |
bd4c625c | 2270 | ret = register_filesystem(&reiserfs_fs_type); |
1da177e4 LT |
2271 | |
2272 | if (ret == 0) { | |
2273 | return 0; | |
2274 | } | |
2275 | ||
bd4c625c LT |
2276 | reiserfs_proc_unregister_global("version"); |
2277 | reiserfs_proc_info_global_done(); | |
2278 | destroy_inodecache(); | |
1da177e4 LT |
2279 | |
2280 | return ret; | |
2281 | } | |
2282 | ||
bd4c625c | 2283 | static void __exit exit_reiserfs_fs(void) |
1da177e4 | 2284 | { |
bd4c625c LT |
2285 | reiserfs_proc_unregister_global("version"); |
2286 | reiserfs_proc_info_global_done(); | |
2287 | unregister_filesystem(&reiserfs_fs_type); | |
2288 | destroy_inodecache(); | |
1da177e4 LT |
2289 | } |
2290 | ||
2291 | struct file_system_type reiserfs_fs_type = { | |
bd4c625c LT |
2292 | .owner = THIS_MODULE, |
2293 | .name = "reiserfs", | |
2294 | .get_sb = get_super_block, | |
edc666e2 | 2295 | .kill_sb = reiserfs_kill_sb, |
bd4c625c | 2296 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 LT |
2297 | }; |
2298 | ||
bd4c625c LT |
2299 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
2300 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); | |
2301 | MODULE_LICENSE("GPL"); | |
1da177e4 | 2302 | |
bd4c625c LT |
2303 | module_init(init_reiserfs_fs); |
2304 | module_exit(exit_reiserfs_fs); |