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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> |
337eb00a | 31 | #include <linux/smp_lock.h> |
1da177e4 LT |
32 | |
33 | struct file_system_type reiserfs_fs_type; | |
34 | ||
35 | static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; | |
36 | static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; | |
37 | static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; | |
38 | ||
bd4c625c | 39 | int is_reiserfs_3_5(struct reiserfs_super_block *rs) |
1da177e4 | 40 | { |
bd4c625c LT |
41 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, |
42 | strlen(reiserfs_3_5_magic_string)); | |
1da177e4 LT |
43 | } |
44 | ||
bd4c625c | 45 | int is_reiserfs_3_6(struct reiserfs_super_block *rs) |
1da177e4 | 46 | { |
bd4c625c LT |
47 | return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, |
48 | strlen(reiserfs_3_6_magic_string)); | |
1da177e4 LT |
49 | } |
50 | ||
bd4c625c | 51 | int is_reiserfs_jr(struct reiserfs_super_block *rs) |
1da177e4 | 52 | { |
bd4c625c LT |
53 | return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, |
54 | strlen(reiserfs_jr_magic_string)); | |
1da177e4 LT |
55 | } |
56 | ||
bd4c625c | 57 | static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) |
1da177e4 | 58 | { |
bd4c625c LT |
59 | return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || |
60 | is_reiserfs_jr(rs)); | |
1da177e4 LT |
61 | } |
62 | ||
bd4c625c | 63 | static int reiserfs_remount(struct super_block *s, int *flags, char *data); |
726c3342 | 64 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); |
1da177e4 | 65 | |
bd4c625c | 66 | static int reiserfs_sync_fs(struct super_block *s, int wait) |
1da177e4 | 67 | { |
5af7926f CH |
68 | struct reiserfs_transaction_handle th; |
69 | ||
70 | reiserfs_write_lock(s); | |
71 | if (!journal_begin(&th, s, 1)) | |
72 | if (!journal_end_sync(&th, s, 1)) | |
73 | reiserfs_flush_old_commits(s); | |
74 | s->s_dirt = 0; /* Even if it's not true. | |
75 | * We'll loop forever in sync_supers otherwise */ | |
76 | reiserfs_write_unlock(s); | |
bd4c625c | 77 | return 0; |
1da177e4 LT |
78 | } |
79 | ||
80 | static void reiserfs_write_super(struct super_block *s) | |
81 | { | |
bd4c625c | 82 | reiserfs_sync_fs(s, 1); |
1da177e4 LT |
83 | } |
84 | ||
c4be0c1d | 85 | static int reiserfs_freeze(struct super_block *s) |
1da177e4 | 86 | { |
bd4c625c LT |
87 | struct reiserfs_transaction_handle th; |
88 | reiserfs_write_lock(s); | |
89 | if (!(s->s_flags & MS_RDONLY)) { | |
90 | int err = journal_begin(&th, s, 1); | |
91 | if (err) { | |
92 | reiserfs_block_writes(&th); | |
93 | } else { | |
94 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
95 | 1); | |
96 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
97 | reiserfs_block_writes(&th); | |
98 | journal_end_sync(&th, s, 1); | |
99 | } | |
100 | } | |
101 | s->s_dirt = 0; | |
102 | reiserfs_write_unlock(s); | |
c4be0c1d | 103 | return 0; |
1da177e4 LT |
104 | } |
105 | ||
c4be0c1d | 106 | static int reiserfs_unfreeze(struct super_block *s) |
bd4c625c LT |
107 | { |
108 | reiserfs_allow_writes(s); | |
c4be0c1d | 109 | return 0; |
1da177e4 LT |
110 | } |
111 | ||
bd4c625c | 112 | extern const struct in_core_key MAX_IN_CORE_KEY; |
1da177e4 LT |
113 | |
114 | /* this is used to delete "save link" when there are no items of a | |
115 | file it points to. It can either happen if unlink is completed but | |
116 | "save unlink" removal, or if file has both unlink and truncate | |
117 | pending and as unlink completes first (because key of "save link" | |
118 | protecting unlink is bigger that a key lf "save link" which | |
119 | protects truncate), so there left no items to make truncate | |
120 | completion on */ | |
bd4c625c LT |
121 | static int remove_save_link_only(struct super_block *s, |
122 | struct reiserfs_key *key, int oid_free) | |
1da177e4 | 123 | { |
bd4c625c LT |
124 | struct reiserfs_transaction_handle th; |
125 | int err; | |
126 | ||
127 | /* we are going to do one balancing */ | |
128 | err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); | |
129 | if (err) | |
130 | return err; | |
131 | ||
132 | reiserfs_delete_solid_item(&th, NULL, key); | |
133 | if (oid_free) | |
134 | /* removals are protected by direct items */ | |
135 | reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); | |
136 | ||
137 | return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT); | |
1da177e4 | 138 | } |
bd4c625c | 139 | |
1da177e4 LT |
140 | #ifdef CONFIG_QUOTA |
141 | static int reiserfs_quota_on_mount(struct super_block *, int); | |
142 | #endif | |
bd4c625c | 143 | |
1da177e4 | 144 | /* look for uncompleted unlinks and truncates and complete them */ |
bd4c625c | 145 | static int finish_unfinished(struct super_block *s) |
1da177e4 | 146 | { |
bd4c625c LT |
147 | INITIALIZE_PATH(path); |
148 | struct cpu_key max_cpu_key, obj_key; | |
fb46f341 | 149 | struct reiserfs_key save_link_key, last_inode_key; |
bd4c625c LT |
150 | int retval = 0; |
151 | struct item_head *ih; | |
152 | struct buffer_head *bh; | |
153 | int item_pos; | |
154 | char *item; | |
155 | int done; | |
156 | struct inode *inode; | |
157 | int truncate; | |
1da177e4 | 158 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
159 | int i; |
160 | int ms_active_set; | |
f4b113ae | 161 | int quota_enabled[MAXQUOTAS]; |
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++) { | |
f4b113ae | 183 | quota_enabled[i] = 1; |
bd4c625c | 184 | if (REISERFS_SB(s)->s_qf_names[i]) { |
f4b113ae JK |
185 | int ret; |
186 | ||
187 | if (sb_has_quota_active(s, i)) { | |
188 | quota_enabled[i] = 0; | |
189 | continue; | |
190 | } | |
191 | ret = reiserfs_quota_on_mount(s, i); | |
bd4c625c | 192 | if (ret < 0) |
45b03d5e JM |
193 | reiserfs_warning(s, "reiserfs-2500", |
194 | "cannot turn on journaled " | |
195 | "quota: error %d", ret); | |
bd4c625c LT |
196 | } |
197 | } | |
1da177e4 | 198 | #endif |
bd4c625c LT |
199 | |
200 | done = 0; | |
201 | REISERFS_SB(s)->s_is_unlinked_ok = 1; | |
202 | while (!retval) { | |
203 | retval = search_item(s, &max_cpu_key, &path); | |
204 | if (retval != ITEM_NOT_FOUND) { | |
0030b645 JM |
205 | reiserfs_error(s, "vs-2140", |
206 | "search_by_key returned %d", retval); | |
bd4c625c LT |
207 | break; |
208 | } | |
209 | ||
210 | bh = get_last_bh(&path); | |
211 | item_pos = get_item_pos(&path); | |
212 | if (item_pos != B_NR_ITEMS(bh)) { | |
45b03d5e JM |
213 | reiserfs_warning(s, "vs-2060", |
214 | "wrong position found"); | |
bd4c625c LT |
215 | break; |
216 | } | |
217 | item_pos--; | |
218 | ih = B_N_PITEM_HEAD(bh, item_pos); | |
219 | ||
220 | if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) | |
221 | /* there are no "save" links anymore */ | |
222 | break; | |
223 | ||
224 | save_link_key = ih->ih_key; | |
225 | if (is_indirect_le_ih(ih)) | |
226 | truncate = 1; | |
227 | else | |
228 | truncate = 0; | |
229 | ||
230 | /* reiserfs_iget needs k_dirid and k_objectid only */ | |
231 | item = B_I_PITEM(bh, ih); | |
232 | obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); | |
233 | obj_key.on_disk_key.k_objectid = | |
234 | le32_to_cpu(ih->ih_key.k_objectid); | |
235 | obj_key.on_disk_key.k_offset = 0; | |
236 | obj_key.on_disk_key.k_type = 0; | |
237 | ||
238 | pathrelse(&path); | |
239 | ||
240 | inode = reiserfs_iget(s, &obj_key); | |
241 | if (!inode) { | |
242 | /* the unlink almost completed, it just did not manage to remove | |
243 | "save" link and release objectid */ | |
45b03d5e | 244 | reiserfs_warning(s, "vs-2180", "iget failed for %K", |
bd4c625c LT |
245 | &obj_key); |
246 | retval = remove_save_link_only(s, &save_link_key, 1); | |
247 | continue; | |
248 | } | |
249 | ||
250 | if (!truncate && inode->i_nlink) { | |
251 | /* file is not unlinked */ | |
45b03d5e JM |
252 | reiserfs_warning(s, "vs-2185", |
253 | "file %K is not unlinked", | |
bd4c625c LT |
254 | &obj_key); |
255 | retval = remove_save_link_only(s, &save_link_key, 0); | |
256 | continue; | |
257 | } | |
871a2931 | 258 | dquot_initialize(inode); |
bd4c625c LT |
259 | |
260 | if (truncate && S_ISDIR(inode->i_mode)) { | |
261 | /* We got a truncate request for a dir which is impossible. | |
262 | The only imaginable way is to execute unfinished truncate request | |
263 | then boot into old kernel, remove the file and create dir with | |
264 | the same key. */ | |
45b03d5e JM |
265 | reiserfs_warning(s, "green-2101", |
266 | "impossible truncate on a " | |
267 | "directory %k. Please report", | |
bd4c625c LT |
268 | INODE_PKEY(inode)); |
269 | retval = remove_save_link_only(s, &save_link_key, 0); | |
270 | truncate = 0; | |
271 | iput(inode); | |
272 | continue; | |
273 | } | |
274 | ||
275 | if (truncate) { | |
276 | REISERFS_I(inode)->i_flags |= | |
277 | i_link_saved_truncate_mask; | |
278 | /* not completed truncate found. New size was committed together | |
279 | with "save" link */ | |
280 | reiserfs_info(s, "Truncating %k to %Ld ..", | |
281 | INODE_PKEY(inode), inode->i_size); | |
282 | reiserfs_truncate_file(inode, | |
283 | 0 | |
284 | /*don't update modification time */ | |
285 | ); | |
286 | retval = remove_save_link(inode, truncate); | |
287 | } else { | |
288 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
289 | /* not completed unlink (rmdir) found */ | |
290 | reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); | |
fb46f341 LW |
291 | if (memcmp(&last_inode_key, INODE_PKEY(inode), |
292 | sizeof(last_inode_key))){ | |
293 | last_inode_key = *INODE_PKEY(inode); | |
294 | /* removal gets completed in iput */ | |
295 | retval = 0; | |
296 | } else { | |
45b03d5e JM |
297 | reiserfs_warning(s, "super-2189", "Dead loop " |
298 | "in finish_unfinished " | |
299 | "detected, just remove " | |
300 | "save link\n"); | |
fb46f341 LW |
301 | retval = remove_save_link_only(s, |
302 | &save_link_key, 0); | |
303 | } | |
bd4c625c LT |
304 | } |
305 | ||
306 | iput(inode); | |
307 | printk("done\n"); | |
308 | done++; | |
309 | } | |
310 | REISERFS_SB(s)->s_is_unlinked_ok = 0; | |
311 | ||
1da177e4 | 312 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
313 | /* Turn quotas off */ |
314 | for (i = 0; i < MAXQUOTAS; i++) { | |
f4b113ae | 315 | if (sb_dqopt(s)->files[i] && quota_enabled[i]) |
287a8095 | 316 | dquot_quota_off(s, i); |
bd4c625c LT |
317 | } |
318 | if (ms_active_set) | |
319 | /* Restore the flag back */ | |
320 | s->s_flags &= ~MS_ACTIVE; | |
1da177e4 | 321 | #endif |
bd4c625c LT |
322 | pathrelse(&path); |
323 | if (done) | |
324 | reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " | |
325 | "Completed\n", done); | |
326 | return retval; | |
1da177e4 | 327 | } |
bd4c625c | 328 | |
1da177e4 LT |
329 | /* to protect file being unlinked from getting lost we "safe" link files |
330 | being unlinked. This link will be deleted in the same transaction with last | |
3a4fa0a2 | 331 | item of file. mounting the filesystem we scan all these links and remove |
1da177e4 | 332 | files which almost got lost */ |
bd4c625c LT |
333 | void add_save_link(struct reiserfs_transaction_handle *th, |
334 | struct inode *inode, int truncate) | |
1da177e4 | 335 | { |
bd4c625c LT |
336 | INITIALIZE_PATH(path); |
337 | int retval; | |
338 | struct cpu_key key; | |
339 | struct item_head ih; | |
340 | __le32 link; | |
341 | ||
342 | BUG_ON(!th->t_trans_id); | |
343 | ||
344 | /* file can only get one "save link" of each kind */ | |
345 | RFALSE(truncate && | |
346 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), | |
347 | "saved link already exists for truncated inode %lx", | |
348 | (long)inode->i_ino); | |
349 | RFALSE(!truncate && | |
350 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), | |
351 | "saved link already exists for unlinked inode %lx", | |
352 | (long)inode->i_ino); | |
353 | ||
354 | /* setup key of "save" link */ | |
355 | key.version = KEY_FORMAT_3_5; | |
356 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; | |
357 | key.on_disk_key.k_objectid = inode->i_ino; | |
358 | if (!truncate) { | |
359 | /* unlink, rmdir, rename */ | |
360 | set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); | |
361 | set_cpu_key_k_type(&key, TYPE_DIRECT); | |
362 | ||
363 | /* item head of "safe" link */ | |
364 | make_le_item_head(&ih, &key, key.version, | |
365 | 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, | |
366 | 4 /*length */ , 0xffff /*free space */ ); | |
367 | } else { | |
368 | /* truncate */ | |
369 | if (S_ISDIR(inode->i_mode)) | |
45b03d5e JM |
370 | reiserfs_warning(inode->i_sb, "green-2102", |
371 | "Adding a truncate savelink for " | |
372 | "a directory %k! Please report", | |
bd4c625c LT |
373 | INODE_PKEY(inode)); |
374 | set_cpu_key_k_offset(&key, 1); | |
375 | set_cpu_key_k_type(&key, TYPE_INDIRECT); | |
376 | ||
377 | /* item head of "safe" link */ | |
378 | make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, | |
379 | 4 /*length */ , 0 /*free space */ ); | |
380 | } | |
381 | key.key_length = 3; | |
382 | ||
383 | /* look for its place in the tree */ | |
384 | retval = search_item(inode->i_sb, &key, &path); | |
385 | if (retval != ITEM_NOT_FOUND) { | |
386 | if (retval != -ENOSPC) | |
0030b645 JM |
387 | reiserfs_error(inode->i_sb, "vs-2100", |
388 | "search_by_key (%K) returned %d", &key, | |
389 | retval); | |
bd4c625c LT |
390 | pathrelse(&path); |
391 | return; | |
392 | } | |
1da177e4 | 393 | |
bd4c625c LT |
394 | /* body of "save" link */ |
395 | link = INODE_PKEY(inode)->k_dir_id; | |
396 | ||
397 | /* put "save" link inot tree, don't charge quota to anyone */ | |
398 | retval = | |
399 | reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); | |
400 | if (retval) { | |
401 | if (retval != -ENOSPC) | |
0030b645 JM |
402 | reiserfs_error(inode->i_sb, "vs-2120", |
403 | "insert_item returned %d", retval); | |
bd4c625c LT |
404 | } else { |
405 | if (truncate) | |
406 | REISERFS_I(inode)->i_flags |= | |
407 | i_link_saved_truncate_mask; | |
408 | else | |
409 | REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; | |
410 | } | |
411 | } | |
1da177e4 LT |
412 | |
413 | /* this opens transaction unlike add_save_link */ | |
bd4c625c | 414 | int remove_save_link(struct inode *inode, int truncate) |
1da177e4 | 415 | { |
bd4c625c LT |
416 | struct reiserfs_transaction_handle th; |
417 | struct reiserfs_key key; | |
418 | int err; | |
419 | ||
420 | /* we are going to do one balancing only */ | |
421 | err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
422 | if (err) | |
423 | return err; | |
424 | ||
425 | /* setup key of "save" link */ | |
426 | key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); | |
427 | key.k_objectid = INODE_PKEY(inode)->k_objectid; | |
428 | if (!truncate) { | |
429 | /* unlink, rmdir, rename */ | |
430 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, | |
431 | 1 + inode->i_sb->s_blocksize); | |
432 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); | |
433 | } else { | |
434 | /* truncate */ | |
435 | set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); | |
436 | set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); | |
437 | } | |
1da177e4 | 438 | |
bd4c625c LT |
439 | if ((truncate && |
440 | (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || | |
441 | (!truncate && | |
442 | (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) | |
443 | /* don't take quota bytes from anywhere */ | |
444 | reiserfs_delete_solid_item(&th, NULL, &key); | |
445 | if (!truncate) { | |
446 | reiserfs_release_objectid(&th, inode->i_ino); | |
447 | REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; | |
448 | } else | |
449 | REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; | |
450 | ||
451 | return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
452 | } | |
1da177e4 | 453 | |
edc666e2 | 454 | static void reiserfs_kill_sb(struct super_block *s) |
1da177e4 | 455 | { |
edc666e2 DH |
456 | if (REISERFS_SB(s)) { |
457 | if (REISERFS_SB(s)->xattr_root) { | |
458 | d_invalidate(REISERFS_SB(s)->xattr_root); | |
459 | dput(REISERFS_SB(s)->xattr_root); | |
460 | REISERFS_SB(s)->xattr_root = NULL; | |
461 | } | |
edc666e2 DH |
462 | if (REISERFS_SB(s)->priv_root) { |
463 | d_invalidate(REISERFS_SB(s)->priv_root); | |
464 | dput(REISERFS_SB(s)->priv_root); | |
465 | REISERFS_SB(s)->priv_root = NULL; | |
466 | } | |
bd4c625c LT |
467 | } |
468 | ||
edc666e2 DH |
469 | kill_block_super(s); |
470 | } | |
471 | ||
472 | static void reiserfs_put_super(struct super_block *s) | |
473 | { | |
474 | struct reiserfs_transaction_handle th; | |
475 | th.t_trans_id = 0; | |
bd4c625c | 476 | |
e0ccfd95 CH |
477 | dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
478 | ||
8ebc4232 | 479 | reiserfs_write_lock(s); |
6cfd0148 | 480 | |
8c85e125 CH |
481 | if (s->s_dirt) |
482 | reiserfs_write_super(s); | |
483 | ||
bd4c625c LT |
484 | /* change file system state to current state if it was mounted with read-write permissions */ |
485 | if (!(s->s_flags & MS_RDONLY)) { | |
486 | if (!journal_begin(&th, s, 10)) { | |
487 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), | |
488 | 1); | |
489 | set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), | |
490 | REISERFS_SB(s)->s_mount_state); | |
491 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
492 | } | |
493 | } | |
494 | ||
495 | /* note, journal_release checks for readonly mount, and can decide not | |
496 | ** to do a journal_end | |
497 | */ | |
498 | journal_release(&th, s); | |
499 | ||
5065227b | 500 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
501 | |
502 | brelse(SB_BUFFER_WITH_SB(s)); | |
503 | ||
504 | print_statistics(s); | |
505 | ||
bd4c625c | 506 | if (REISERFS_SB(s)->reserved_blocks != 0) { |
45b03d5e | 507 | reiserfs_warning(s, "green-2005", "reserved blocks left %d", |
bd4c625c LT |
508 | REISERFS_SB(s)->reserved_blocks); |
509 | } | |
510 | ||
511 | reiserfs_proc_info_done(s); | |
512 | ||
8ebc4232 FW |
513 | reiserfs_write_unlock(s); |
514 | mutex_destroy(&REISERFS_SB(s)->lock); | |
bd4c625c LT |
515 | kfree(s->s_fs_info); |
516 | s->s_fs_info = NULL; | |
1da177e4 LT |
517 | } |
518 | ||
e18b890b | 519 | static struct kmem_cache *reiserfs_inode_cachep; |
1da177e4 LT |
520 | |
521 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) | |
522 | { | |
523 | struct reiserfs_inode_info *ei; | |
bd4c625c | 524 | ei = (struct reiserfs_inode_info *) |
e94b1766 | 525 | kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
526 | if (!ei) |
527 | return NULL; | |
528 | return &ei->vfs_inode; | |
529 | } | |
530 | ||
531 | static void reiserfs_destroy_inode(struct inode *inode) | |
532 | { | |
533 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); | |
534 | } | |
535 | ||
51cc5068 | 536 | static void init_once(void *foo) |
1da177e4 | 537 | { |
bd4c625c | 538 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; |
1da177e4 | 539 | |
a35afb83 CL |
540 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
541 | inode_init_once(&ei->vfs_inode); | |
1da177e4 | 542 | } |
bd4c625c | 543 | |
1da177e4 LT |
544 | static int init_inodecache(void) |
545 | { | |
546 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", | |
bd4c625c LT |
547 | sizeof(struct |
548 | reiserfs_inode_info), | |
fffb60f9 PJ |
549 | 0, (SLAB_RECLAIM_ACCOUNT| |
550 | SLAB_MEM_SPREAD), | |
20c2df83 | 551 | init_once); |
1da177e4 LT |
552 | if (reiserfs_inode_cachep == NULL) |
553 | return -ENOMEM; | |
554 | return 0; | |
555 | } | |
556 | ||
557 | static void destroy_inodecache(void) | |
558 | { | |
1a1d92c1 | 559 | kmem_cache_destroy(reiserfs_inode_cachep); |
1da177e4 LT |
560 | } |
561 | ||
562 | /* we don't mark inodes dirty, we just log them */ | |
bd4c625c LT |
563 | static void reiserfs_dirty_inode(struct inode *inode) |
564 | { | |
565 | struct reiserfs_transaction_handle th; | |
566 | ||
567 | int err = 0; | |
dc8f6d89 FW |
568 | int lock_depth; |
569 | ||
bd4c625c | 570 | if (inode->i_sb->s_flags & MS_RDONLY) { |
45b03d5e JM |
571 | reiserfs_warning(inode->i_sb, "clm-6006", |
572 | "writing inode %lu on readonly FS", | |
bd4c625c LT |
573 | inode->i_ino); |
574 | return; | |
575 | } | |
dc8f6d89 | 576 | lock_depth = reiserfs_write_lock_once(inode->i_sb); |
bd4c625c LT |
577 | |
578 | /* this is really only used for atime updates, so they don't have | |
579 | ** to be included in O_SYNC or fsync | |
580 | */ | |
581 | err = journal_begin(&th, inode->i_sb, 1); | |
dc8f6d89 FW |
582 | if (err) |
583 | goto out; | |
584 | ||
bd4c625c LT |
585 | reiserfs_update_sd(&th, inode); |
586 | journal_end(&th, inode->i_sb, 1); | |
dc8f6d89 FW |
587 | |
588 | out: | |
589 | reiserfs_write_unlock_once(inode->i_sb, lock_depth); | |
1da177e4 LT |
590 | } |
591 | ||
257ba15c CH |
592 | static void reiserfs_clear_inode(struct inode *inode) |
593 | { | |
9f754758 | 594 | dquot_drop(inode); |
257ba15c CH |
595 | } |
596 | ||
1da177e4 | 597 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
598 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, |
599 | size_t, loff_t); | |
600 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, | |
601 | loff_t); | |
1da177e4 LT |
602 | #endif |
603 | ||
ee9b6d61 | 604 | static const struct super_operations reiserfs_sops = { |
bd4c625c LT |
605 | .alloc_inode = reiserfs_alloc_inode, |
606 | .destroy_inode = reiserfs_destroy_inode, | |
607 | .write_inode = reiserfs_write_inode, | |
608 | .dirty_inode = reiserfs_dirty_inode, | |
257ba15c | 609 | .clear_inode = reiserfs_clear_inode, |
bd4c625c | 610 | .delete_inode = reiserfs_delete_inode, |
bd4c625c LT |
611 | .put_super = reiserfs_put_super, |
612 | .write_super = reiserfs_write_super, | |
613 | .sync_fs = reiserfs_sync_fs, | |
c4be0c1d TS |
614 | .freeze_fs = reiserfs_freeze, |
615 | .unfreeze_fs = reiserfs_unfreeze, | |
bd4c625c LT |
616 | .statfs = reiserfs_statfs, |
617 | .remount_fs = reiserfs_remount, | |
cdf6ccc8 | 618 | .show_options = generic_show_options, |
1da177e4 | 619 | #ifdef CONFIG_QUOTA |
bd4c625c LT |
620 | .quota_read = reiserfs_quota_read, |
621 | .quota_write = reiserfs_quota_write, | |
1da177e4 LT |
622 | #endif |
623 | }; | |
624 | ||
625 | #ifdef CONFIG_QUOTA | |
626 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
627 | ||
1da177e4 LT |
628 | static int reiserfs_write_dquot(struct dquot *); |
629 | static int reiserfs_acquire_dquot(struct dquot *); | |
630 | static int reiserfs_release_dquot(struct dquot *); | |
631 | static int reiserfs_mark_dquot_dirty(struct dquot *); | |
632 | static int reiserfs_write_info(struct super_block *, int); | |
307ae18a | 633 | static int reiserfs_quota_on(struct super_block *, int, int, char *); |
1da177e4 | 634 | |
61e225dc | 635 | static const struct dquot_operations reiserfs_quota_operations = { |
bd4c625c LT |
636 | .write_dquot = reiserfs_write_dquot, |
637 | .acquire_dquot = reiserfs_acquire_dquot, | |
638 | .release_dquot = reiserfs_release_dquot, | |
639 | .mark_dirty = reiserfs_mark_dquot_dirty, | |
640 | .write_info = reiserfs_write_info, | |
4103003b JK |
641 | .alloc_dquot = dquot_alloc, |
642 | .destroy_dquot = dquot_destroy, | |
1da177e4 LT |
643 | }; |
644 | ||
0d54b217 | 645 | static const struct quotactl_ops reiserfs_qctl_operations = { |
bd4c625c | 646 | .quota_on = reiserfs_quota_on, |
287a8095 CH |
647 | .quota_off = dquot_quota_off, |
648 | .quota_sync = dquot_quota_sync, | |
649 | .get_info = dquot_get_dqinfo, | |
650 | .set_info = dquot_set_dqinfo, | |
651 | .get_dqblk = dquot_get_dqblk, | |
652 | .set_dqblk = dquot_set_dqblk, | |
1da177e4 LT |
653 | }; |
654 | #endif | |
655 | ||
39655164 | 656 | static const struct export_operations reiserfs_export_ops = { |
bd4c625c | 657 | .encode_fh = reiserfs_encode_fh, |
be55caf1 CH |
658 | .fh_to_dentry = reiserfs_fh_to_dentry, |
659 | .fh_to_parent = reiserfs_fh_to_parent, | |
bd4c625c | 660 | .get_parent = reiserfs_get_parent, |
bd4c625c | 661 | }; |
1da177e4 LT |
662 | |
663 | /* this struct is used in reiserfs_getopt () for containing the value for those | |
664 | mount options that have values rather than being toggles. */ | |
665 | typedef struct { | |
bd4c625c LT |
666 | char *value; |
667 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
668 | value is found, 0 is no bits are to be changed. */ | |
669 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
670 | value is found, 0 is no bits are to be changed. This is | |
671 | applied BEFORE setmask */ | |
1da177e4 LT |
672 | } arg_desc_t; |
673 | ||
674 | /* Set this bit in arg_required to allow empty arguments */ | |
675 | #define REISERFS_OPT_ALLOWEMPTY 31 | |
676 | ||
677 | /* this struct is used in reiserfs_getopt() for describing the set of reiserfs | |
678 | mount options */ | |
679 | typedef struct { | |
bd4c625c LT |
680 | char *option_name; |
681 | int arg_required; /* 0 if argument is not required, not 0 otherwise */ | |
682 | const arg_desc_t *values; /* list of values accepted by an option */ | |
683 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
684 | value is found, 0 is no bits are to be changed. */ | |
685 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
686 | value is found, 0 is no bits are to be changed. This is | |
687 | applied BEFORE setmask */ | |
1da177e4 LT |
688 | } opt_desc_t; |
689 | ||
690 | /* possible values for -o data= */ | |
691 | static const arg_desc_t logging_mode[] = { | |
bd4c625c LT |
692 | {"ordered", 1 << REISERFS_DATA_ORDERED, |
693 | (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, | |
694 | {"journal", 1 << REISERFS_DATA_LOG, | |
695 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, | |
696 | {"writeback", 1 << REISERFS_DATA_WRITEBACK, | |
697 | (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, | |
cd02b966 | 698 | {.value = NULL} |
1da177e4 LT |
699 | }; |
700 | ||
701 | /* possible values for -o barrier= */ | |
702 | static const arg_desc_t barrier_mode[] = { | |
bd4c625c LT |
703 | {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, |
704 | {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, | |
cd02b966 | 705 | {.value = NULL} |
1da177e4 LT |
706 | }; |
707 | ||
708 | /* possible values for "-o block-allocator=" and bits which are to be set in | |
709 | s_mount_opt of reiserfs specific part of in-core super block */ | |
710 | static const arg_desc_t balloc[] = { | |
bd4c625c LT |
711 | {"noborder", 1 << REISERFS_NO_BORDER, 0}, |
712 | {"border", 0, 1 << REISERFS_NO_BORDER}, | |
713 | {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, | |
714 | {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, | |
715 | {"test4", 1 << REISERFS_TEST4, 0}, | |
716 | {"notest4", 0, 1 << REISERFS_TEST4}, | |
717 | {NULL, 0, 0} | |
1da177e4 LT |
718 | }; |
719 | ||
720 | static const arg_desc_t tails[] = { | |
bd4c625c LT |
721 | {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, |
722 | {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
723 | {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, | |
724 | {NULL, 0, 0} | |
1da177e4 LT |
725 | }; |
726 | ||
727 | static const arg_desc_t error_actions[] = { | |
bd4c625c LT |
728 | {"panic", 1 << REISERFS_ERROR_PANIC, |
729 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, | |
730 | {"ro-remount", 1 << REISERFS_ERROR_RO, | |
731 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, | |
1da177e4 | 732 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG |
bd4c625c LT |
733 | {"continue", 1 << REISERFS_ERROR_CONTINUE, |
734 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, | |
1da177e4 | 735 | #endif |
bd4c625c | 736 | {NULL, 0, 0}, |
1da177e4 LT |
737 | }; |
738 | ||
1da177e4 LT |
739 | /* proceed only one option from a list *cur - string containing of mount options |
740 | opts - array of options which are accepted | |
741 | opt_arg - if option is found and requires an argument and if it is specifed | |
742 | in the input - pointer to the argument is stored here | |
743 | bit_flags - if option requires to set a certain bit - it is set here | |
744 | return -1 if unknown option is found, opt->arg_required otherwise */ | |
bd4c625c LT |
745 | static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, |
746 | char **opt_arg, unsigned long *bit_flags) | |
1da177e4 | 747 | { |
bd4c625c | 748 | char *p; |
0222e657 | 749 | /* foo=bar, |
bd4c625c LT |
750 | ^ ^ ^ |
751 | | | +-- option_end | |
752 | | +-- arg_start | |
753 | +-- option_start | |
754 | */ | |
755 | const opt_desc_t *opt; | |
756 | const arg_desc_t *arg; | |
757 | ||
758 | p = *cur; | |
759 | ||
760 | /* assume argument cannot contain commas */ | |
761 | *cur = strchr(p, ','); | |
762 | if (*cur) { | |
763 | *(*cur) = '\0'; | |
764 | (*cur)++; | |
765 | } | |
766 | ||
767 | if (!strncmp(p, "alloc=", 6)) { | |
768 | /* Ugly special case, probably we should redo options parser so that | |
769 | it can understand several arguments for some options, also so that | |
770 | it can fill several bitfields with option values. */ | |
771 | if (reiserfs_parse_alloc_options(s, p + 6)) { | |
772 | return -1; | |
773 | } else { | |
774 | return 0; | |
775 | } | |
776 | } | |
777 | ||
778 | /* for every option in the list */ | |
779 | for (opt = opts; opt->option_name; opt++) { | |
780 | if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { | |
781 | if (bit_flags) { | |
782 | if (opt->clrmask == | |
783 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
784 | reiserfs_warning(s, "super-6500", |
785 | "%s not supported.\n", | |
bd4c625c LT |
786 | p); |
787 | else | |
788 | *bit_flags &= ~opt->clrmask; | |
789 | if (opt->setmask == | |
790 | (1 << REISERFS_UNSUPPORTED_OPT)) | |
45b03d5e JM |
791 | reiserfs_warning(s, "super-6501", |
792 | "%s not supported.\n", | |
bd4c625c LT |
793 | p); |
794 | else | |
795 | *bit_flags |= opt->setmask; | |
796 | } | |
797 | break; | |
798 | } | |
799 | } | |
800 | if (!opt->option_name) { | |
45b03d5e JM |
801 | reiserfs_warning(s, "super-6502", |
802 | "unknown mount option \"%s\"", p); | |
bd4c625c LT |
803 | return -1; |
804 | } | |
805 | ||
806 | p += strlen(opt->option_name); | |
807 | switch (*p) { | |
808 | case '=': | |
809 | if (!opt->arg_required) { | |
45b03d5e JM |
810 | reiserfs_warning(s, "super-6503", |
811 | "the option \"%s\" does not " | |
812 | "require an argument\n", | |
bd4c625c LT |
813 | opt->option_name); |
814 | return -1; | |
815 | } | |
816 | break; | |
817 | ||
818 | case 0: | |
819 | if (opt->arg_required) { | |
45b03d5e JM |
820 | reiserfs_warning(s, "super-6504", |
821 | "the option \"%s\" requires an " | |
822 | "argument\n", opt->option_name); | |
bd4c625c LT |
823 | return -1; |
824 | } | |
825 | break; | |
826 | default: | |
45b03d5e JM |
827 | reiserfs_warning(s, "super-6505", |
828 | "head of option \"%s\" is only correct\n", | |
bd4c625c LT |
829 | opt->option_name); |
830 | return -1; | |
831 | } | |
832 | ||
833 | /* move to the argument, or to next option if argument is not required */ | |
834 | p++; | |
835 | ||
836 | if (opt->arg_required | |
837 | && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) | |
838 | && !strlen(p)) { | |
839 | /* this catches "option=," if not allowed */ | |
45b03d5e JM |
840 | reiserfs_warning(s, "super-6506", |
841 | "empty argument for \"%s\"\n", | |
bd4c625c LT |
842 | opt->option_name); |
843 | return -1; | |
844 | } | |
845 | ||
846 | if (!opt->values) { | |
847 | /* *=NULLopt_arg contains pointer to argument */ | |
848 | *opt_arg = p; | |
849 | return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); | |
850 | } | |
851 | ||
852 | /* values possible for this option are listed in opt->values */ | |
853 | for (arg = opt->values; arg->value; arg++) { | |
854 | if (!strcmp(p, arg->value)) { | |
855 | if (bit_flags) { | |
856 | *bit_flags &= ~arg->clrmask; | |
857 | *bit_flags |= arg->setmask; | |
858 | } | |
859 | return opt->arg_required; | |
860 | } | |
861 | } | |
862 | ||
45b03d5e JM |
863 | reiserfs_warning(s, "super-6506", |
864 | "bad value \"%s\" for option \"%s\"\n", p, | |
bd4c625c | 865 | opt->option_name); |
1da177e4 | 866 | return -1; |
1da177e4 LT |
867 | } |
868 | ||
869 | /* returns 0 if something is wrong in option string, 1 - otherwise */ | |
bd4c625c LT |
870 | static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */ |
871 | unsigned long *mount_options, | |
872 | /* after the parsing phase, contains the | |
873 | collection of bitflags defining what | |
874 | mount options were selected. */ | |
875 | unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */ | |
876 | char **jdev_name, | |
00b44197 JK |
877 | unsigned int *commit_max_age, |
878 | char **qf_names, | |
879 | unsigned int *qfmt) | |
1da177e4 | 880 | { |
bd4c625c LT |
881 | int c; |
882 | char *arg = NULL; | |
883 | char *pos; | |
884 | opt_desc_t opts[] = { | |
885 | /* Compatibility stuff, so that -o notail for old setups still work */ | |
886 | {"tails",.arg_required = 't',.values = tails}, | |
887 | {"notail",.clrmask = | |
888 | (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, | |
889 | {"conv",.setmask = 1 << REISERFS_CONVERT}, | |
890 | {"attrs",.setmask = 1 << REISERFS_ATTRS}, | |
891 | {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, | |
73422811 | 892 | {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, |
1da177e4 | 893 | #ifdef CONFIG_REISERFS_FS_XATTR |
bd4c625c LT |
894 | {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, |
895 | {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, | |
1da177e4 | 896 | #else |
bd4c625c LT |
897 | {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
898 | {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 LT |
899 | #endif |
900 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
bd4c625c LT |
901 | {"acl",.setmask = 1 << REISERFS_POSIXACL}, |
902 | {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, | |
1da177e4 | 903 | #else |
bd4c625c LT |
904 | {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, |
905 | {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, | |
1da177e4 | 906 | #endif |
cd02b966 | 907 | {.option_name = "nolog"}, |
bd4c625c LT |
908 | {"replayonly",.setmask = 1 << REPLAYONLY}, |
909 | {"block-allocator",.arg_required = 'a',.values = balloc}, | |
910 | {"data",.arg_required = 'd',.values = logging_mode}, | |
911 | {"barrier",.arg_required = 'b',.values = barrier_mode}, | |
912 | {"resize",.arg_required = 'r',.values = NULL}, | |
913 | {"jdev",.arg_required = 'j',.values = NULL}, | |
914 | {"nolargeio",.arg_required = 'w',.values = NULL}, | |
915 | {"commit",.arg_required = 'c',.values = NULL}, | |
916 | {"usrquota",.setmask = 1 << REISERFS_QUOTA}, | |
917 | {"grpquota",.setmask = 1 << REISERFS_QUOTA}, | |
918 | {"noquota",.clrmask = 1 << REISERFS_QUOTA}, | |
919 | {"errors",.arg_required = 'e',.values = error_actions}, | |
920 | {"usrjquota",.arg_required = | |
921 | 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
922 | {"grpjquota",.arg_required = | |
923 | 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, | |
924 | {"jqfmt",.arg_required = 'f',.values = NULL}, | |
cd02b966 | 925 | {.option_name = NULL} |
bd4c625c LT |
926 | }; |
927 | ||
928 | *blocks = 0; | |
929 | if (!options || !*options) | |
930 | /* use default configuration: create tails, journaling on, no | |
931 | conversion to newest format */ | |
932 | return 1; | |
933 | ||
934 | for (pos = options; pos;) { | |
935 | c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); | |
936 | if (c == -1) | |
937 | /* wrong option is given */ | |
9a3bb301 | 938 | return 0; |
1da177e4 | 939 | |
bd4c625c LT |
940 | if (c == 'r') { |
941 | char *p; | |
942 | ||
943 | p = NULL; | |
944 | /* "resize=NNN" or "resize=auto" */ | |
945 | ||
946 | if (!strcmp(arg, "auto")) { | |
947 | /* From JFS code, to auto-get the size. */ | |
948 | *blocks = | |
949 | s->s_bdev->bd_inode->i_size >> s-> | |
950 | s_blocksize_bits; | |
951 | } else { | |
952 | *blocks = simple_strtoul(arg, &p, 0); | |
953 | if (*p != '\0') { | |
954 | /* NNN does not look like a number */ | |
45b03d5e JM |
955 | reiserfs_warning(s, "super-6507", |
956 | "bad value %s for " | |
957 | "-oresize\n", arg); | |
bd4c625c LT |
958 | return 0; |
959 | } | |
960 | } | |
1da177e4 | 961 | } |
1da177e4 | 962 | |
bd4c625c LT |
963 | if (c == 'c') { |
964 | char *p = NULL; | |
965 | unsigned long val = simple_strtoul(arg, &p, 0); | |
966 | /* commit=NNN (time in seconds) */ | |
967 | if (*p != '\0' || val >= (unsigned int)-1) { | |
45b03d5e JM |
968 | reiserfs_warning(s, "super-6508", |
969 | "bad value %s for -ocommit\n", | |
bd4c625c LT |
970 | arg); |
971 | return 0; | |
972 | } | |
973 | *commit_max_age = (unsigned int)val; | |
1da177e4 | 974 | } |
1da177e4 | 975 | |
bd4c625c | 976 | if (c == 'w') { |
45b03d5e JM |
977 | reiserfs_warning(s, "super-6509", "nolargeio option " |
978 | "is no longer supported"); | |
36b756f2 | 979 | return 0; |
1da177e4 | 980 | } |
1da177e4 | 981 | |
bd4c625c LT |
982 | if (c == 'j') { |
983 | if (arg && *arg && jdev_name) { | |
984 | if (*jdev_name) { //Hm, already assigned? | |
45b03d5e JM |
985 | reiserfs_warning(s, "super-6510", |
986 | "journal device was " | |
987 | "already specified to " | |
988 | "be %s", *jdev_name); | |
bd4c625c LT |
989 | return 0; |
990 | } | |
991 | *jdev_name = arg; | |
992 | } | |
1da177e4 | 993 | } |
bd4c625c LT |
994 | #ifdef CONFIG_QUOTA |
995 | if (c == 'u' || c == 'g') { | |
996 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; | |
997 | ||
6929f891 | 998 | if (sb_any_quota_loaded(s) && |
00b44197 | 999 | (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { |
45b03d5e JM |
1000 | reiserfs_warning(s, "super-6511", |
1001 | "cannot change journaled " | |
1002 | "quota options when quota " | |
1003 | "turned on."); | |
bd4c625c LT |
1004 | return 0; |
1005 | } | |
1006 | if (*arg) { /* Some filename specified? */ | |
1007 | if (REISERFS_SB(s)->s_qf_names[qtype] | |
1008 | && strcmp(REISERFS_SB(s)->s_qf_names[qtype], | |
1009 | arg)) { | |
45b03d5e JM |
1010 | reiserfs_warning(s, "super-6512", |
1011 | "%s quota file " | |
1012 | "already specified.", | |
bd4c625c LT |
1013 | QTYPE2NAME(qtype)); |
1014 | return 0; | |
1015 | } | |
1016 | if (strchr(arg, '/')) { | |
45b03d5e JM |
1017 | reiserfs_warning(s, "super-6513", |
1018 | "quotafile must be " | |
1019 | "on filesystem root."); | |
bd4c625c LT |
1020 | return 0; |
1021 | } | |
00b44197 | 1022 | qf_names[qtype] = |
bd4c625c | 1023 | kmalloc(strlen(arg) + 1, GFP_KERNEL); |
00b44197 | 1024 | if (!qf_names[qtype]) { |
45b03d5e JM |
1025 | reiserfs_warning(s, "reiserfs-2502", |
1026 | "not enough memory " | |
1027 | "for storing " | |
1028 | "quotafile name."); | |
bd4c625c LT |
1029 | return 0; |
1030 | } | |
00b44197 | 1031 | strcpy(qf_names[qtype], arg); |
bd4c625c LT |
1032 | *mount_options |= 1 << REISERFS_QUOTA; |
1033 | } else { | |
00b44197 JK |
1034 | if (qf_names[qtype] != |
1035 | REISERFS_SB(s)->s_qf_names[qtype]) | |
1036 | kfree(qf_names[qtype]); | |
1037 | qf_names[qtype] = NULL; | |
bd4c625c | 1038 | } |
1da177e4 | 1039 | } |
bd4c625c LT |
1040 | if (c == 'f') { |
1041 | if (!strcmp(arg, "vfsold")) | |
00b44197 | 1042 | *qfmt = QFMT_VFS_OLD; |
bd4c625c | 1043 | else if (!strcmp(arg, "vfsv0")) |
00b44197 | 1044 | *qfmt = QFMT_VFS_V0; |
bd4c625c | 1045 | else { |
45b03d5e JM |
1046 | reiserfs_warning(s, "super-6514", |
1047 | "unknown quota format " | |
1048 | "specified."); | |
bd4c625c LT |
1049 | return 0; |
1050 | } | |
6929f891 | 1051 | if (sb_any_quota_loaded(s) && |
00b44197 | 1052 | *qfmt != REISERFS_SB(s)->s_jquota_fmt) { |
45b03d5e JM |
1053 | reiserfs_warning(s, "super-6515", |
1054 | "cannot change journaled " | |
1055 | "quota options when quota " | |
1056 | "turned on."); | |
00b44197 JK |
1057 | return 0; |
1058 | } | |
1da177e4 | 1059 | } |
bd4c625c LT |
1060 | #else |
1061 | if (c == 'u' || c == 'g' || c == 'f') { | |
45b03d5e JM |
1062 | reiserfs_warning(s, "reiserfs-2503", "journaled " |
1063 | "quota options not supported."); | |
bd4c625c | 1064 | return 0; |
1da177e4 | 1065 | } |
bd4c625c LT |
1066 | #endif |
1067 | } | |
1068 | ||
1069 | #ifdef CONFIG_QUOTA | |
00b44197 JK |
1070 | if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt |
1071 | && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { | |
45b03d5e JM |
1072 | reiserfs_warning(s, "super-6515", |
1073 | "journaled quota format not specified."); | |
1da177e4 | 1074 | return 0; |
1da177e4 | 1075 | } |
bd4c625c LT |
1076 | /* This checking is not precise wrt the quota type but for our purposes it is sufficient */ |
1077 | if (!(*mount_options & (1 << REISERFS_QUOTA)) | |
6929f891 | 1078 | && sb_any_quota_loaded(s)) { |
45b03d5e JM |
1079 | reiserfs_warning(s, "super-6516", "quota options must " |
1080 | "be present when quota is turned on."); | |
bd4c625c | 1081 | return 0; |
1da177e4 LT |
1082 | } |
1083 | #endif | |
556a2a45 | 1084 | |
bd4c625c | 1085 | return 1; |
1da177e4 LT |
1086 | } |
1087 | ||
bd4c625c LT |
1088 | static void switch_data_mode(struct super_block *s, unsigned long mode) |
1089 | { | |
1090 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | | |
1091 | (1 << REISERFS_DATA_ORDERED) | | |
1092 | (1 << REISERFS_DATA_WRITEBACK)); | |
1093 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); | |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) | |
1097 | { | |
bd4c625c LT |
1098 | if (mount_options & (1 << REISERFS_DATA_LOG)) { |
1099 | if (!reiserfs_data_log(s)) { | |
1100 | switch_data_mode(s, REISERFS_DATA_LOG); | |
1101 | reiserfs_info(s, "switching to journaled data mode\n"); | |
1102 | } | |
1103 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { | |
1104 | if (!reiserfs_data_ordered(s)) { | |
1105 | switch_data_mode(s, REISERFS_DATA_ORDERED); | |
1106 | reiserfs_info(s, "switching to ordered data mode\n"); | |
1107 | } | |
1108 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { | |
1109 | if (!reiserfs_data_writeback(s)) { | |
1110 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); | |
1111 | reiserfs_info(s, "switching to writeback data mode\n"); | |
1112 | } | |
1113 | } | |
1da177e4 LT |
1114 | } |
1115 | ||
bd4c625c LT |
1116 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) |
1117 | { | |
1118 | int flush = (1 << REISERFS_BARRIER_FLUSH); | |
1119 | int none = (1 << REISERFS_BARRIER_NONE); | |
1120 | int all_barrier = flush | none; | |
1121 | ||
1122 | if (bits & all_barrier) { | |
1123 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; | |
1124 | if (bits & flush) { | |
1125 | REISERFS_SB(s)->s_mount_opt |= flush; | |
1126 | printk("reiserfs: enabling write barrier flush mode\n"); | |
1127 | } else if (bits & none) { | |
1128 | REISERFS_SB(s)->s_mount_opt |= none; | |
1129 | printk("reiserfs: write barriers turned off\n"); | |
1130 | } | |
1131 | } | |
1da177e4 LT |
1132 | } |
1133 | ||
bd4c625c | 1134 | static void handle_attrs(struct super_block *s) |
1da177e4 | 1135 | { |
bd4c625c | 1136 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1137 | |
bd4c625c LT |
1138 | if (reiserfs_attrs(s)) { |
1139 | if (old_format_only(s)) { | |
45b03d5e JM |
1140 | reiserfs_warning(s, "super-6517", "cannot support " |
1141 | "attributes on 3.5.x disk format"); | |
bd4c625c | 1142 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1143 | return; |
1144 | } | |
bd4c625c | 1145 | if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { |
45b03d5e JM |
1146 | reiserfs_warning(s, "super-6518", "cannot support " |
1147 | "attributes until flag is set in " | |
1148 | "super-block"); | |
bd4c625c | 1149 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); |
1da177e4 LT |
1150 | } |
1151 | } | |
1152 | } | |
1153 | ||
00b44197 JK |
1154 | #ifdef CONFIG_QUOTA |
1155 | static void handle_quota_files(struct super_block *s, char **qf_names, | |
1156 | unsigned int *qfmt) | |
1157 | { | |
1158 | int i; | |
1159 | ||
1160 | for (i = 0; i < MAXQUOTAS; i++) { | |
1161 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1162 | kfree(REISERFS_SB(s)->s_qf_names[i]); | |
1163 | REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; | |
1164 | } | |
1165 | REISERFS_SB(s)->s_jquota_fmt = *qfmt; | |
1166 | } | |
1167 | #endif | |
1168 | ||
bd4c625c | 1169 | static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) |
1da177e4 | 1170 | { |
bd4c625c LT |
1171 | struct reiserfs_super_block *rs; |
1172 | struct reiserfs_transaction_handle th; | |
1173 | unsigned long blocks; | |
1174 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; | |
1175 | unsigned long safe_mask = 0; | |
1176 | unsigned int commit_max_age = (unsigned int)-1; | |
1177 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
cdf6ccc8 | 1178 | char *new_opts = kstrdup(arg, GFP_KERNEL); |
bd4c625c | 1179 | int err; |
00b44197 JK |
1180 | char *qf_names[MAXQUOTAS]; |
1181 | unsigned int qfmt = 0; | |
1da177e4 | 1182 | #ifdef CONFIG_QUOTA |
bd4c625c | 1183 | int i; |
8ebc4232 | 1184 | #endif |
00b44197 | 1185 | |
8ebc4232 | 1186 | reiserfs_write_lock(s); |
00b44197 | 1187 | |
8ebc4232 | 1188 | #ifdef CONFIG_QUOTA |
00b44197 | 1189 | memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); |
1da177e4 LT |
1190 | #endif |
1191 | ||
bd4c625c | 1192 | rs = SB_DISK_SUPER_BLOCK(s); |
1da177e4 | 1193 | |
bd4c625c | 1194 | if (!reiserfs_parse_options |
00b44197 JK |
1195 | (s, arg, &mount_options, &blocks, NULL, &commit_max_age, |
1196 | qf_names, &qfmt)) { | |
1da177e4 | 1197 | #ifdef CONFIG_QUOTA |
00b44197 JK |
1198 | for (i = 0; i < MAXQUOTAS; i++) |
1199 | if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) | |
1200 | kfree(qf_names[i]); | |
1da177e4 | 1201 | #endif |
cdf6ccc8 MS |
1202 | err = -EINVAL; |
1203 | goto out_err; | |
bd4c625c | 1204 | } |
00b44197 JK |
1205 | #ifdef CONFIG_QUOTA |
1206 | handle_quota_files(s, qf_names, &qfmt); | |
1207 | #endif | |
bd4c625c LT |
1208 | |
1209 | handle_attrs(s); | |
1210 | ||
1211 | /* Add options that are safe here */ | |
1212 | safe_mask |= 1 << REISERFS_SMALLTAIL; | |
1213 | safe_mask |= 1 << REISERFS_LARGETAIL; | |
1214 | safe_mask |= 1 << REISERFS_NO_BORDER; | |
1215 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; | |
1216 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; | |
1217 | safe_mask |= 1 << REISERFS_TEST4; | |
1218 | safe_mask |= 1 << REISERFS_ATTRS; | |
1219 | safe_mask |= 1 << REISERFS_XATTRS_USER; | |
1220 | safe_mask |= 1 << REISERFS_POSIXACL; | |
1221 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; | |
1222 | safe_mask |= 1 << REISERFS_BARRIER_NONE; | |
1223 | safe_mask |= 1 << REISERFS_ERROR_RO; | |
1224 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; | |
1225 | safe_mask |= 1 << REISERFS_ERROR_PANIC; | |
1226 | safe_mask |= 1 << REISERFS_QUOTA; | |
1227 | ||
1228 | /* Update the bitmask, taking care to keep | |
1229 | * the bits we're not allowed to change here */ | |
1230 | REISERFS_SB(s)->s_mount_opt = | |
1231 | (REISERFS_SB(s)-> | |
1232 | s_mount_opt & ~safe_mask) | (mount_options & safe_mask); | |
1233 | ||
1234 | if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { | |
1235 | journal->j_max_commit_age = commit_max_age; | |
1236 | journal->j_max_trans_age = commit_max_age; | |
1237 | } else if (commit_max_age == 0) { | |
1238 | /* 0 means restore defaults. */ | |
1239 | journal->j_max_commit_age = journal->j_default_max_commit_age; | |
1240 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
1241 | } | |
1242 | ||
1243 | if (blocks) { | |
cdf6ccc8 MS |
1244 | err = reiserfs_resize(s, blocks); |
1245 | if (err != 0) | |
1246 | goto out_err; | |
bd4c625c LT |
1247 | } |
1248 | ||
1249 | if (*mount_flags & MS_RDONLY) { | |
1250 | reiserfs_xattr_init(s, *mount_flags); | |
1251 | /* remount read-only */ | |
1252 | if (s->s_flags & MS_RDONLY) | |
1253 | /* it is read-only already */ | |
cdf6ccc8 | 1254 | goto out_ok; |
c79d967d | 1255 | |
0f0dd62f CH |
1256 | err = dquot_suspend(s, -1); |
1257 | if (err < 0) | |
c79d967d | 1258 | goto out_err; |
c79d967d | 1259 | |
bd4c625c LT |
1260 | /* try to remount file system with read-only permissions */ |
1261 | if (sb_umount_state(rs) == REISERFS_VALID_FS | |
1262 | || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { | |
cdf6ccc8 | 1263 | goto out_ok; |
bd4c625c LT |
1264 | } |
1265 | ||
1266 | err = journal_begin(&th, s, 10); | |
1267 | if (err) | |
cdf6ccc8 | 1268 | goto out_err; |
bd4c625c LT |
1269 | |
1270 | /* Mounting a rw partition read-only. */ | |
1271 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1272 | set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); | |
1273 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1274 | } else { | |
1275 | /* remount read-write */ | |
1276 | if (!(s->s_flags & MS_RDONLY)) { | |
1277 | reiserfs_xattr_init(s, *mount_flags); | |
cdf6ccc8 | 1278 | goto out_ok; /* We are read-write already */ |
bd4c625c LT |
1279 | } |
1280 | ||
cdf6ccc8 MS |
1281 | if (reiserfs_is_journal_aborted(journal)) { |
1282 | err = journal->j_errno; | |
1283 | goto out_err; | |
1284 | } | |
bd4c625c LT |
1285 | |
1286 | handle_data_mode(s, mount_options); | |
1287 | handle_barrier_mode(s, mount_options); | |
1288 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1289 | s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ | |
1290 | err = journal_begin(&th, s, 10); | |
1291 | if (err) | |
cdf6ccc8 | 1292 | goto out_err; |
bd4c625c LT |
1293 | |
1294 | /* Mount a partition which is read-only, read-write */ | |
1295 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1296 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1297 | s->s_flags &= ~MS_RDONLY; | |
1298 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
702d21c6 JM |
1299 | if (!old_format_only(s)) |
1300 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
bd4c625c LT |
1301 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ |
1302 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1303 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; | |
1304 | } | |
1305 | /* this will force a full flush of all journal lists */ | |
1306 | SB_JOURNAL(s)->j_must_wait = 1; | |
1307 | err = journal_end(&th, s, 10); | |
1308 | if (err) | |
cdf6ccc8 | 1309 | goto out_err; |
bd4c625c LT |
1310 | s->s_dirt = 0; |
1311 | ||
1312 | if (!(*mount_flags & MS_RDONLY)) { | |
0f0dd62f | 1313 | dquot_resume(s, -1); |
bd4c625c LT |
1314 | finish_unfinished(s); |
1315 | reiserfs_xattr_init(s, *mount_flags); | |
1316 | } | |
1317 | ||
cdf6ccc8 | 1318 | out_ok: |
2a32cebd | 1319 | replace_mount_options(s, new_opts); |
8ebc4232 | 1320 | reiserfs_write_unlock(s); |
bd4c625c | 1321 | return 0; |
cdf6ccc8 MS |
1322 | |
1323 | out_err: | |
1324 | kfree(new_opts); | |
8ebc4232 | 1325 | reiserfs_write_unlock(s); |
cdf6ccc8 | 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 | |
0222e657 | 1351 | // |
bd4c625c LT |
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 | 1428 | ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))); |
8ebc4232 | 1429 | reiserfs_write_unlock(s); |
bd4c625c | 1430 | wait_on_buffer(SB_BUFFER_WITH_SB(s)); |
8ebc4232 | 1431 | reiserfs_write_lock(s); |
bd4c625c | 1432 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { |
45b03d5e | 1433 | reiserfs_warning(s, "reiserfs-2504", "error reading the super"); |
bd4c625c LT |
1434 | return 1; |
1435 | } | |
1da177e4 | 1436 | |
bd4c625c | 1437 | return 0; |
bd4c625c | 1438 | } |
1da177e4 LT |
1439 | |
1440 | ///////////////////////////////////////////////////// | |
1441 | // hash detection stuff | |
1442 | ||
1da177e4 LT |
1443 | // if root directory is empty - we set default - Yura's - hash and |
1444 | // warn about it | |
1445 | // FIXME: we look for only one name in a directory. If tea and yura | |
1446 | // bith have the same value - we ask user to send report to the | |
1447 | // mailing list | |
bd4c625c | 1448 | static __u32 find_hash_out(struct super_block *s) |
1da177e4 | 1449 | { |
bd4c625c LT |
1450 | int retval; |
1451 | struct inode *inode; | |
1452 | struct cpu_key key; | |
1453 | INITIALIZE_PATH(path); | |
1454 | struct reiserfs_dir_entry de; | |
1455 | __u32 hash = DEFAULT_HASH; | |
1456 | ||
1457 | inode = s->s_root->d_inode; | |
1458 | ||
1459 | do { // Some serious "goto"-hater was there ;) | |
1460 | u32 teahash, r5hash, yurahash; | |
1461 | ||
1462 | make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); | |
1463 | retval = search_by_entry_key(s, &key, &path, &de); | |
1464 | if (retval == IO_ERROR) { | |
1465 | pathrelse(&path); | |
1466 | return UNSET_HASH; | |
1467 | } | |
1468 | if (retval == NAME_NOT_FOUND) | |
1469 | de.de_entry_num--; | |
1470 | set_de_name_and_namelen(&de); | |
1471 | if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) { | |
1472 | /* allow override in this case */ | |
1473 | if (reiserfs_rupasov_hash(s)) { | |
1474 | hash = YURA_HASH; | |
1475 | } | |
1d889d99 JM |
1476 | reiserfs_info(s, "FS seems to be empty, autodetect " |
1477 | "is using the default hash\n"); | |
bd4c625c LT |
1478 | break; |
1479 | } | |
1480 | r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); | |
1481 | teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); | |
1482 | yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); | |
1483 | if (((teahash == r5hash) | |
1484 | && | |
1485 | (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) | |
1486 | == r5hash)) || ((teahash == yurahash) | |
1487 | && (yurahash == | |
1488 | GET_HASH_VALUE(deh_offset | |
1489 | (& | |
1490 | (de. | |
1491 | de_deh[de. | |
1492 | de_entry_num]))))) | |
1493 | || ((r5hash == yurahash) | |
1494 | && (yurahash == | |
1495 | GET_HASH_VALUE(deh_offset | |
1496 | (&(de.de_deh[de.de_entry_num])))))) { | |
45b03d5e JM |
1497 | reiserfs_warning(s, "reiserfs-2506", "Unable to " |
1498 | "automatically detect hash function. " | |
1499 | "Please mount with -o " | |
1500 | "hash={tea,rupasov,r5}"); | |
bd4c625c LT |
1501 | hash = UNSET_HASH; |
1502 | break; | |
1503 | } | |
1504 | if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) == | |
1505 | yurahash) | |
1506 | hash = YURA_HASH; | |
1507 | else if (GET_HASH_VALUE | |
1508 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) | |
1509 | hash = TEA_HASH; | |
1510 | else if (GET_HASH_VALUE | |
1511 | (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) | |
1512 | hash = R5_HASH; | |
1513 | else { | |
45b03d5e JM |
1514 | reiserfs_warning(s, "reiserfs-2506", |
1515 | "Unrecognised hash function"); | |
bd4c625c LT |
1516 | hash = UNSET_HASH; |
1517 | } | |
1518 | } while (0); | |
1519 | ||
1520 | pathrelse(&path); | |
1521 | return hash; | |
1da177e4 LT |
1522 | } |
1523 | ||
1524 | // finds out which hash names are sorted with | |
bd4c625c | 1525 | static int what_hash(struct super_block *s) |
1da177e4 | 1526 | { |
bd4c625c LT |
1527 | __u32 code; |
1528 | ||
1529 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); | |
1530 | ||
1531 | /* reiserfs_hash_detect() == true if any of the hash mount options | |
1532 | ** were used. We must check them to make sure the user isn't | |
1533 | ** using a bad hash value | |
1534 | */ | |
1535 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) | |
1536 | code = find_hash_out(s); | |
1537 | ||
1538 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { | |
0222e657 JM |
1539 | /* detection has found the hash, and we must check against the |
1540 | ** mount options | |
bd4c625c LT |
1541 | */ |
1542 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { | |
45b03d5e JM |
1543 | reiserfs_warning(s, "reiserfs-2507", |
1544 | "Error, %s hash detected, " | |
bd4c625c LT |
1545 | "unable to force rupasov hash", |
1546 | reiserfs_hashname(code)); | |
1547 | code = UNSET_HASH; | |
1548 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { | |
45b03d5e JM |
1549 | reiserfs_warning(s, "reiserfs-2508", |
1550 | "Error, %s hash detected, " | |
bd4c625c LT |
1551 | "unable to force tea hash", |
1552 | reiserfs_hashname(code)); | |
1553 | code = UNSET_HASH; | |
1554 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { | |
45b03d5e JM |
1555 | reiserfs_warning(s, "reiserfs-2509", |
1556 | "Error, %s hash detected, " | |
bd4c625c LT |
1557 | "unable to force r5 hash", |
1558 | reiserfs_hashname(code)); | |
1559 | code = UNSET_HASH; | |
1560 | } | |
1561 | } else { | |
1562 | /* find_hash_out was not called or could not determine the hash */ | |
1563 | if (reiserfs_rupasov_hash(s)) { | |
1564 | code = YURA_HASH; | |
1565 | } else if (reiserfs_tea_hash(s)) { | |
1566 | code = TEA_HASH; | |
1567 | } else if (reiserfs_r5_hash(s)) { | |
1568 | code = R5_HASH; | |
1569 | } | |
1570 | } | |
1571 | ||
0222e657 | 1572 | /* if we are mounted RW, and we have a new valid hash code, update |
bd4c625c LT |
1573 | ** the super |
1574 | */ | |
1575 | if (code != UNSET_HASH && | |
1576 | !(s->s_flags & MS_RDONLY) && | |
1577 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { | |
1578 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); | |
1579 | } | |
1580 | return code; | |
1da177e4 LT |
1581 | } |
1582 | ||
1583 | // return pointer to appropriate function | |
bd4c625c | 1584 | static hashf_t hash_function(struct super_block *s) |
1da177e4 | 1585 | { |
bd4c625c LT |
1586 | switch (what_hash(s)) { |
1587 | case TEA_HASH: | |
1588 | reiserfs_info(s, "Using tea hash to sort names\n"); | |
1589 | return keyed_hash; | |
1590 | case YURA_HASH: | |
1591 | reiserfs_info(s, "Using rupasov hash to sort names\n"); | |
1592 | return yura_hash; | |
1593 | case R5_HASH: | |
1594 | reiserfs_info(s, "Using r5 hash to sort names\n"); | |
1595 | return r5_hash; | |
1596 | } | |
1597 | return NULL; | |
1da177e4 LT |
1598 | } |
1599 | ||
1600 | // this is used to set up correct value for old partitions | |
bd4c625c | 1601 | static int function2code(hashf_t func) |
1da177e4 | 1602 | { |
bd4c625c LT |
1603 | if (func == keyed_hash) |
1604 | return TEA_HASH; | |
1605 | if (func == yura_hash) | |
1606 | return YURA_HASH; | |
1607 | if (func == r5_hash) | |
1608 | return R5_HASH; | |
1da177e4 | 1609 | |
bd4c625c | 1610 | BUG(); // should never happen |
1da177e4 | 1611 | |
bd4c625c | 1612 | return 0; |
1da177e4 LT |
1613 | } |
1614 | ||
45b03d5e | 1615 | #define SWARN(silent, s, id, ...) \ |
1da177e4 | 1616 | if (!(silent)) \ |
45b03d5e | 1617 | reiserfs_warning(s, id, __VA_ARGS__) |
1da177e4 | 1618 | |
bd4c625c | 1619 | static int reiserfs_fill_super(struct super_block *s, void *data, int silent) |
1da177e4 | 1620 | { |
bd4c625c | 1621 | struct inode *root_inode; |
bd4c625c LT |
1622 | struct reiserfs_transaction_handle th; |
1623 | int old_format = 0; | |
1624 | unsigned long blocks; | |
1625 | unsigned int commit_max_age = 0; | |
1626 | int jinit_done = 0; | |
1627 | struct reiserfs_iget_args args; | |
1628 | struct reiserfs_super_block *rs; | |
1629 | char *jdev_name; | |
1630 | struct reiserfs_sb_info *sbi; | |
1631 | int errval = -EINVAL; | |
00b44197 JK |
1632 | char *qf_names[MAXQUOTAS] = {}; |
1633 | unsigned int qfmt = 0; | |
bd4c625c | 1634 | |
cdf6ccc8 MS |
1635 | save_mount_options(s, data); |
1636 | ||
01afb213 | 1637 | sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); |
b7b7fa43 JM |
1638 | if (!sbi) |
1639 | return -ENOMEM; | |
bd4c625c | 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 | ||
8ebc4232 FW |
1652 | mutex_init(&REISERFS_SB(s)->lock); |
1653 | REISERFS_SB(s)->lock_depth = -1; | |
1654 | ||
1655 | /* | |
1656 | * This function is called with the bkl, which also was the old | |
1657 | * locking used here. | |
1658 | * do_journal_begin() will soon check if we hold the lock (ie: was the | |
1659 | * bkl). This is likely because do_journal_begin() has several another | |
1660 | * callers because at this time, it doesn't seem to be necessary to | |
1661 | * protect against anything. | |
1662 | * Anyway, let's be conservative and lock for now. | |
1663 | */ | |
1664 | reiserfs_write_lock(s); | |
1665 | ||
bd4c625c LT |
1666 | jdev_name = NULL; |
1667 | if (reiserfs_parse_options | |
1668 | (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name, | |
00b44197 | 1669 | &commit_max_age, qf_names, &qfmt) == 0) { |
bd4c625c LT |
1670 | goto error; |
1671 | } | |
00b44197 JK |
1672 | #ifdef CONFIG_QUOTA |
1673 | handle_quota_files(s, qf_names, &qfmt); | |
1674 | #endif | |
bd4c625c LT |
1675 | |
1676 | if (blocks) { | |
45b03d5e | 1677 | SWARN(silent, s, "jmacd-7", "resize option for remount only"); |
bd4c625c LT |
1678 | goto error; |
1679 | } | |
1680 | ||
1681 | /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ | |
1682 | if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) | |
1683 | old_format = 1; | |
1684 | /* try new format (64-th 1k block), which can contain reiserfs super block */ | |
1685 | else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { | |
45b03d5e | 1686 | SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", |
bd4c625c LT |
1687 | reiserfs_bdevname(s)); |
1688 | goto error; | |
1689 | } | |
1690 | ||
1691 | rs = SB_DISK_SUPER_BLOCK(s); | |
1692 | /* Let's do basic sanity check to verify that underlying device is not | |
1693 | smaller than the filesystem. If the check fails then abort and scream, | |
1694 | because bad stuff will happen otherwise. */ | |
1695 | if (s->s_bdev && s->s_bdev->bd_inode | |
1696 | && i_size_read(s->s_bdev->bd_inode) < | |
1697 | sb_block_count(rs) * sb_blocksize(rs)) { | |
45b03d5e JM |
1698 | SWARN(silent, s, "", "Filesystem cannot be " |
1699 | "mounted because it is bigger than the device"); | |
1700 | SWARN(silent, s, "", "You may need to run fsck " | |
1701 | "or increase size of your LVM partition"); | |
1702 | SWARN(silent, s, "", "Or may be you forgot to " | |
1703 | "reboot after fdisk when it told you to"); | |
bd4c625c LT |
1704 | goto error; |
1705 | } | |
1706 | ||
1707 | sbi->s_mount_state = SB_REISERFS_STATE(s); | |
1708 | sbi->s_mount_state = REISERFS_VALID_FS; | |
1709 | ||
6f01046b | 1710 | if ((errval = reiserfs_init_bitmap_cache(s))) { |
45b03d5e | 1711 | SWARN(silent, s, "jmacd-8", "unable to read bitmap"); |
bd4c625c LT |
1712 | goto error; |
1713 | } | |
d2c89a42 | 1714 | errval = -EINVAL; |
1da177e4 | 1715 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1716 | SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); |
1717 | SWARN(silent, s, "", "- it is slow mode for debugging."); | |
1da177e4 LT |
1718 | #endif |
1719 | ||
bd4c625c LT |
1720 | /* make data=ordered the default */ |
1721 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && | |
1722 | !reiserfs_data_writeback(s)) { | |
1723 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); | |
1724 | } | |
1725 | ||
1726 | if (reiserfs_data_log(s)) { | |
1727 | reiserfs_info(s, "using journaled data mode\n"); | |
1728 | } else if (reiserfs_data_ordered(s)) { | |
1729 | reiserfs_info(s, "using ordered data mode\n"); | |
1730 | } else { | |
1731 | reiserfs_info(s, "using writeback data mode\n"); | |
1732 | } | |
1733 | if (reiserfs_barrier_flush(s)) { | |
1734 | printk("reiserfs: using flush barriers\n"); | |
1735 | } | |
1736 | // set_device_ro(s->s_dev, 1) ; | |
1737 | if (journal_init(s, jdev_name, old_format, commit_max_age)) { | |
45b03d5e JM |
1738 | SWARN(silent, s, "sh-2022", |
1739 | "unable to initialize journal space"); | |
bd4c625c LT |
1740 | goto error; |
1741 | } else { | |
1742 | jinit_done = 1; /* once this is set, journal_release must be called | |
1743 | ** if we error out of the mount | |
1744 | */ | |
1745 | } | |
1746 | if (reread_meta_blocks(s)) { | |
45b03d5e JM |
1747 | SWARN(silent, s, "jmacd-9", |
1748 | "unable to reread meta blocks after journal init"); | |
bd4c625c LT |
1749 | goto error; |
1750 | } | |
1751 | ||
1752 | if (replay_only(s)) | |
1753 | goto error; | |
1754 | ||
1755 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { | |
45b03d5e JM |
1756 | SWARN(silent, s, "clm-7000", |
1757 | "Detected readonly device, marking FS readonly"); | |
bd4c625c LT |
1758 | s->s_flags |= MS_RDONLY; |
1759 | } | |
1760 | args.objectid = REISERFS_ROOT_OBJECTID; | |
1761 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID; | |
1762 | root_inode = | |
1763 | iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, | |
1764 | reiserfs_init_locked_inode, (void *)(&args)); | |
1765 | if (!root_inode) { | |
45b03d5e | 1766 | SWARN(silent, s, "jmacd-10", "get root inode failed"); |
bd4c625c LT |
1767 | goto error; |
1768 | } | |
1769 | ||
1770 | if (root_inode->i_state & I_NEW) { | |
1771 | reiserfs_read_locked_inode(root_inode, &args); | |
1772 | unlock_new_inode(root_inode); | |
1773 | } | |
1774 | ||
1775 | s->s_root = d_alloc_root(root_inode); | |
1776 | if (!s->s_root) { | |
1777 | iput(root_inode); | |
1778 | goto error; | |
1779 | } | |
1780 | // define and initialize hash function | |
1781 | sbi->s_hash_function = hash_function(s); | |
1782 | if (sbi->s_hash_function == NULL) { | |
1783 | dput(s->s_root); | |
1784 | s->s_root = NULL; | |
1785 | goto error; | |
1786 | } | |
1787 | ||
1788 | if (is_reiserfs_3_5(rs) | |
1789 | || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) | |
1790 | set_bit(REISERFS_3_5, &(sbi->s_properties)); | |
e1fabd3c JM |
1791 | else if (old_format) |
1792 | set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties)); | |
bd4c625c LT |
1793 | else |
1794 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1795 | ||
1796 | if (!(s->s_flags & MS_RDONLY)) { | |
1797 | ||
1798 | errval = journal_begin(&th, s, 1); | |
1799 | if (errval) { | |
1800 | dput(s->s_root); | |
1801 | s->s_root = NULL; | |
1802 | goto error; | |
1803 | } | |
1804 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
1805 | ||
1806 | set_sb_umount_state(rs, REISERFS_ERROR_FS); | |
1807 | set_sb_fs_state(rs, 0); | |
1808 | ||
cb680c1b JM |
1809 | /* Clear out s_bmap_nr if it would wrap. We can handle this |
1810 | * case, but older revisions can't. This will cause the | |
1811 | * file system to fail mount on those older implementations, | |
1812 | * avoiding corruption. -jeffm */ | |
1813 | if (bmap_would_wrap(reiserfs_bmap_count(s)) && | |
1814 | sb_bmap_nr(rs) != 0) { | |
45b03d5e | 1815 | reiserfs_warning(s, "super-2030", "This file system " |
cb680c1b JM |
1816 | "claims to use %u bitmap blocks in " |
1817 | "its super block, but requires %u. " | |
1818 | "Clearing to zero.", sb_bmap_nr(rs), | |
1819 | reiserfs_bmap_count(s)); | |
1820 | ||
1821 | set_sb_bmap_nr(rs, 0); | |
1822 | } | |
1823 | ||
bd4c625c LT |
1824 | if (old_format_only(s)) { |
1825 | /* filesystem of format 3.5 either with standard or non-standard | |
1826 | journal */ | |
1827 | if (convert_reiserfs(s)) { | |
1828 | /* and -o conv is given */ | |
1829 | if (!silent) | |
1830 | reiserfs_info(s, | |
1831 | "converting 3.5 filesystem to the 3.6 format"); | |
1832 | ||
1833 | if (is_reiserfs_3_5(rs)) | |
1834 | /* put magic string of 3.6 format. 2.2 will not be able to | |
1835 | mount this filesystem anymore */ | |
1836 | memcpy(rs->s_v1.s_magic, | |
1837 | reiserfs_3_6_magic_string, | |
1838 | sizeof | |
1839 | (reiserfs_3_6_magic_string)); | |
1840 | ||
1841 | set_sb_version(rs, REISERFS_VERSION_2); | |
1842 | reiserfs_convert_objectid_map_v1(s); | |
1843 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1844 | clear_bit(REISERFS_3_5, &(sbi->s_properties)); | |
1845 | } else if (!silent) { | |
1846 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
1847 | } | |
702d21c6 JM |
1848 | } else |
1849 | set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); | |
1850 | ||
bd4c625c LT |
1851 | |
1852 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); | |
1853 | errval = journal_end(&th, s, 1); | |
1854 | if (errval) { | |
1855 | dput(s->s_root); | |
1856 | s->s_root = NULL; | |
1857 | goto error; | |
1858 | } | |
1859 | ||
edcc37a0 AV |
1860 | if ((errval = reiserfs_lookup_privroot(s)) || |
1861 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
1862 | dput(s->s_root); |
1863 | s->s_root = NULL; | |
1864 | goto error; | |
1865 | } | |
1866 | ||
1867 | /* look for files which were to be removed in previous session */ | |
1868 | finish_unfinished(s); | |
1869 | } else { | |
1870 | if (old_format_only(s) && !silent) { | |
1871 | reiserfs_info(s, "using 3.5.x disk format\n"); | |
1872 | } | |
1873 | ||
edcc37a0 AV |
1874 | if ((errval = reiserfs_lookup_privroot(s)) || |
1875 | (errval = reiserfs_xattr_init(s, s->s_flags))) { | |
bd4c625c LT |
1876 | dput(s->s_root); |
1877 | s->s_root = NULL; | |
1878 | goto error; | |
1879 | } | |
1880 | } | |
1881 | // mark hash in super block: it could be unset. overwrite should be ok | |
1882 | set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); | |
1883 | ||
1884 | handle_attrs(s); | |
1885 | ||
1886 | reiserfs_proc_info_init(s); | |
1887 | ||
1888 | init_waitqueue_head(&(sbi->s_wait)); | |
1889 | spin_lock_init(&sbi->bitmap_lock); | |
1890 | ||
8ebc4232 FW |
1891 | reiserfs_write_unlock(s); |
1892 | ||
bd4c625c LT |
1893 | return (0); |
1894 | ||
00b44197 | 1895 | error: |
bd4c625c LT |
1896 | if (jinit_done) { /* kill the commit thread, free journal ram */ |
1897 | journal_release_error(NULL, s); | |
1898 | } | |
5065227b | 1899 | |
b7b7fa43 JM |
1900 | reiserfs_write_unlock(s); |
1901 | ||
5065227b | 1902 | reiserfs_free_bitmap_cache(s); |
bd4c625c LT |
1903 | if (SB_BUFFER_WITH_SB(s)) |
1904 | brelse(SB_BUFFER_WITH_SB(s)); | |
1da177e4 | 1905 | #ifdef CONFIG_QUOTA |
5065227b JM |
1906 | { |
1907 | int j; | |
00b44197 JK |
1908 | for (j = 0; j < MAXQUOTAS; j++) |
1909 | kfree(qf_names[j]); | |
bd4c625c | 1910 | } |
1da177e4 | 1911 | #endif |
833d304b | 1912 | kfree(sbi); |
1da177e4 | 1913 | |
bd4c625c LT |
1914 | s->s_fs_info = NULL; |
1915 | return errval; | |
1da177e4 LT |
1916 | } |
1917 | ||
726c3342 | 1918 | static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1919 | { |
726c3342 | 1920 | struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); |
bd4c625c LT |
1921 | |
1922 | buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); | |
1923 | buf->f_bfree = sb_free_blocks(rs); | |
1924 | buf->f_bavail = buf->f_bfree; | |
1925 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; | |
726c3342 | 1926 | buf->f_bsize = dentry->d_sb->s_blocksize; |
bd4c625c LT |
1927 | /* changed to accommodate gcc folks. */ |
1928 | buf->f_type = REISERFS_SUPER_MAGIC; | |
651d0623 CL |
1929 | buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); |
1930 | buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, | |
1931 | sizeof(rs->s_uuid)/2); | |
1932 | ||
bd4c625c | 1933 | return 0; |
1da177e4 LT |
1934 | } |
1935 | ||
1936 | #ifdef CONFIG_QUOTA | |
1da177e4 LT |
1937 | static int reiserfs_write_dquot(struct dquot *dquot) |
1938 | { | |
bd4c625c LT |
1939 | struct reiserfs_transaction_handle th; |
1940 | int ret, err; | |
1941 | ||
1942 | reiserfs_write_lock(dquot->dq_sb); | |
1943 | ret = | |
1944 | journal_begin(&th, dquot->dq_sb, | |
1945 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
1946 | if (ret) | |
1947 | goto out; | |
1948 | ret = dquot_commit(dquot); | |
1949 | err = | |
1950 | journal_end(&th, dquot->dq_sb, | |
1951 | REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
1952 | if (!ret && err) | |
1953 | ret = err; | |
1954 | out: | |
1955 | reiserfs_write_unlock(dquot->dq_sb); | |
1956 | return ret; | |
1da177e4 LT |
1957 | } |
1958 | ||
1959 | static int reiserfs_acquire_dquot(struct dquot *dquot) | |
1960 | { | |
bd4c625c LT |
1961 | struct reiserfs_transaction_handle th; |
1962 | int ret, err; | |
1963 | ||
1964 | reiserfs_write_lock(dquot->dq_sb); | |
1965 | ret = | |
1966 | journal_begin(&th, dquot->dq_sb, | |
1967 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
1968 | if (ret) | |
1969 | goto out; | |
1970 | ret = dquot_acquire(dquot); | |
1971 | err = | |
1972 | journal_end(&th, dquot->dq_sb, | |
1973 | REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
1974 | if (!ret && err) | |
1975 | ret = err; | |
1976 | out: | |
1977 | reiserfs_write_unlock(dquot->dq_sb); | |
1978 | return ret; | |
1da177e4 LT |
1979 | } |
1980 | ||
1981 | static int reiserfs_release_dquot(struct dquot *dquot) | |
1982 | { | |
bd4c625c LT |
1983 | struct reiserfs_transaction_handle th; |
1984 | int ret, err; | |
1985 | ||
1986 | reiserfs_write_lock(dquot->dq_sb); | |
1987 | ret = | |
1988 | journal_begin(&th, dquot->dq_sb, | |
1989 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
1990 | if (ret) { |
1991 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
1992 | dquot_release(dquot); | |
bd4c625c | 1993 | goto out; |
9c3013e9 | 1994 | } |
bd4c625c LT |
1995 | ret = dquot_release(dquot); |
1996 | err = | |
1997 | journal_end(&th, dquot->dq_sb, | |
1998 | REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
1999 | if (!ret && err) | |
2000 | ret = err; | |
2001 | out: | |
2002 | reiserfs_write_unlock(dquot->dq_sb); | |
2003 | return ret; | |
1da177e4 LT |
2004 | } |
2005 | ||
2006 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) | |
2007 | { | |
4506567b | 2008 | /* Are we journaling quotas? */ |
bd4c625c LT |
2009 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2010 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
2011 | dquot_mark_dquot_dirty(dquot); | |
2012 | return reiserfs_write_dquot(dquot); | |
2013 | } else | |
2014 | return dquot_mark_dquot_dirty(dquot); | |
1da177e4 LT |
2015 | } |
2016 | ||
2017 | static int reiserfs_write_info(struct super_block *sb, int type) | |
2018 | { | |
bd4c625c LT |
2019 | struct reiserfs_transaction_handle th; |
2020 | int ret, err; | |
2021 | ||
2022 | /* Data block + inode block */ | |
2023 | reiserfs_write_lock(sb); | |
2024 | ret = journal_begin(&th, sb, 2); | |
2025 | if (ret) | |
2026 | goto out; | |
2027 | ret = dquot_commit_info(sb, type); | |
2028 | err = journal_end(&th, sb, 2); | |
2029 | if (!ret && err) | |
2030 | ret = err; | |
2031 | out: | |
2032 | reiserfs_write_unlock(sb); | |
2033 | return ret; | |
1da177e4 LT |
2034 | } |
2035 | ||
2036 | /* | |
84de856e | 2037 | * Turn on quotas during mount time - we need to find the quota file and such... |
1da177e4 LT |
2038 | */ |
2039 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) | |
2040 | { | |
287a8095 CH |
2041 | return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], |
2042 | REISERFS_SB(sb)->s_jquota_fmt, type); | |
1da177e4 LT |
2043 | } |
2044 | ||
2045 | /* | |
2046 | * Standard function to be called on quota_on | |
2047 | */ | |
bd4c625c | 2048 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, |
307ae18a | 2049 | char *name) |
1da177e4 | 2050 | { |
bd4c625c | 2051 | int err; |
8264613d | 2052 | struct path path; |
d5dee5c3 | 2053 | struct inode *inode; |
5d4f7fdd | 2054 | struct reiserfs_transaction_handle th; |
bd4c625c LT |
2055 | |
2056 | if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA))) | |
2057 | return -EINVAL; | |
307ae18a | 2058 | |
8264613d | 2059 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
bd4c625c LT |
2060 | if (err) |
2061 | return err; | |
2062 | /* Quotafile not on the same filesystem? */ | |
8264613d | 2063 | if (path.mnt->mnt_sb != sb) { |
77e69dac AV |
2064 | err = -EXDEV; |
2065 | goto out; | |
bd4c625c | 2066 | } |
8264613d | 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? */ | |
8264613d | 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 | } |
287a8095 | 2102 | err = dquot_quota_on_path(sb, type, format_id, &path); |
77e69dac | 2103 | out: |
8264613d | 2104 | path_put(&path); |
77e69dac | 2105 | return err; |
1da177e4 LT |
2106 | } |
2107 | ||
2108 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2109 | * acquiring the locks... As quota files are never truncated and quota code | |
2110 | * itself serializes the operations (and noone else should touch the files) | |
2111 | * we don't have to be afraid of races */ | |
2112 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, | |
2113 | size_t len, loff_t off) | |
2114 | { | |
bd4c625c LT |
2115 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2116 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2117 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2118 | size_t toread; | |
2119 | struct buffer_head tmp_bh, *bh; | |
2120 | loff_t i_size = i_size_read(inode); | |
2121 | ||
2122 | if (off > i_size) | |
2123 | return 0; | |
2124 | if (off + len > i_size) | |
2125 | len = i_size - off; | |
2126 | toread = len; | |
2127 | while (toread > 0) { | |
2128 | tocopy = | |
2129 | sb->s_blocksize - offset < | |
2130 | toread ? sb->s_blocksize - offset : toread; | |
2131 | tmp_bh.b_state = 0; | |
2132 | /* Quota files are without tails so we can safely use this function */ | |
2133 | reiserfs_write_lock(sb); | |
2134 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); | |
2135 | reiserfs_write_unlock(sb); | |
2136 | if (err) | |
2137 | return err; | |
2138 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
2139 | memset(data, 0, tocopy); | |
2140 | else { | |
2141 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2142 | if (!bh) | |
2143 | return -EIO; | |
2144 | memcpy(data, bh->b_data + offset, tocopy); | |
2145 | brelse(bh); | |
2146 | } | |
2147 | offset = 0; | |
2148 | toread -= tocopy; | |
2149 | data += tocopy; | |
2150 | blk++; | |
2151 | } | |
2152 | return len; | |
1da177e4 LT |
2153 | } |
2154 | ||
2155 | /* Write to quotafile (we know the transaction is already started and has | |
2156 | * enough credits) */ | |
2157 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, | |
2158 | const char *data, size_t len, loff_t off) | |
2159 | { | |
bd4c625c LT |
2160 | struct inode *inode = sb_dqopt(sb)->files[type]; |
2161 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2162 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2163 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; | |
2164 | size_t towrite = len; | |
2165 | struct buffer_head tmp_bh, *bh; | |
2166 | ||
9c3013e9 JK |
2167 | if (!current->journal_info) { |
2168 | printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)" | |
2169 | " cancelled because transaction is not started.\n", | |
2170 | (unsigned long long)off, (unsigned long long)len); | |
2171 | return -EIO; | |
2172 | } | |
5c81a419 | 2173 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
bd4c625c LT |
2174 | while (towrite > 0) { |
2175 | tocopy = sb->s_blocksize - offset < towrite ? | |
2176 | sb->s_blocksize - offset : towrite; | |
2177 | tmp_bh.b_state = 0; | |
2178 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); | |
2179 | if (err) | |
2180 | goto out; | |
2181 | if (offset || tocopy != sb->s_blocksize) | |
2182 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2183 | else | |
2184 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
2185 | if (!bh) { | |
2186 | err = -EIO; | |
2187 | goto out; | |
2188 | } | |
2189 | lock_buffer(bh); | |
2190 | memcpy(bh->b_data + offset, data, tocopy); | |
2191 | flush_dcache_page(bh->b_page); | |
2192 | set_buffer_uptodate(bh); | |
2193 | unlock_buffer(bh); | |
2194 | reiserfs_prepare_for_journal(sb, bh, 1); | |
2195 | journal_mark_dirty(current->journal_info, sb, bh); | |
2196 | if (!journal_quota) | |
2197 | reiserfs_add_ordered_list(inode, bh); | |
2198 | brelse(bh); | |
2199 | offset = 0; | |
2200 | towrite -= tocopy; | |
2201 | data += tocopy; | |
2202 | blk++; | |
2203 | } | |
9c3013e9 | 2204 | out: |
10dd08dc JK |
2205 | if (len == towrite) { |
2206 | mutex_unlock(&inode->i_mutex); | |
bd4c625c | 2207 | return err; |
10dd08dc | 2208 | } |
bd4c625c LT |
2209 | if (inode->i_size < off + len - towrite) |
2210 | i_size_write(inode, off + len - towrite); | |
2211 | inode->i_version++; | |
2212 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2213 | mark_inode_dirty(inode); | |
1b1dcc1b | 2214 | mutex_unlock(&inode->i_mutex); |
bd4c625c | 2215 | return len - towrite; |
1da177e4 LT |
2216 | } |
2217 | ||
2218 | #endif | |
2219 | ||
454e2398 DH |
2220 | static int get_super_block(struct file_system_type *fs_type, |
2221 | int flags, const char *dev_name, | |
2222 | void *data, struct vfsmount *mnt) | |
1da177e4 | 2223 | { |
454e2398 DH |
2224 | return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super, |
2225 | mnt); | |
1da177e4 LT |
2226 | } |
2227 | ||
bd4c625c | 2228 | static int __init init_reiserfs_fs(void) |
1da177e4 LT |
2229 | { |
2230 | int ret; | |
2231 | ||
bd4c625c | 2232 | if ((ret = init_inodecache())) { |
1da177e4 LT |
2233 | return ret; |
2234 | } | |
2235 | ||
bd4c625c | 2236 | reiserfs_proc_info_global_init(); |
1da177e4 | 2237 | |
bd4c625c | 2238 | ret = register_filesystem(&reiserfs_fs_type); |
1da177e4 LT |
2239 | |
2240 | if (ret == 0) { | |
2241 | return 0; | |
2242 | } | |
2243 | ||
bd4c625c LT |
2244 | reiserfs_proc_info_global_done(); |
2245 | destroy_inodecache(); | |
1da177e4 LT |
2246 | |
2247 | return ret; | |
2248 | } | |
2249 | ||
bd4c625c | 2250 | static void __exit exit_reiserfs_fs(void) |
1da177e4 | 2251 | { |
bd4c625c LT |
2252 | reiserfs_proc_info_global_done(); |
2253 | unregister_filesystem(&reiserfs_fs_type); | |
2254 | destroy_inodecache(); | |
1da177e4 LT |
2255 | } |
2256 | ||
2257 | struct file_system_type reiserfs_fs_type = { | |
bd4c625c LT |
2258 | .owner = THIS_MODULE, |
2259 | .name = "reiserfs", | |
2260 | .get_sb = get_super_block, | |
edc666e2 | 2261 | .kill_sb = reiserfs_kill_sb, |
bd4c625c | 2262 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 LT |
2263 | }; |
2264 | ||
bd4c625c LT |
2265 | MODULE_DESCRIPTION("ReiserFS journaled filesystem"); |
2266 | MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); | |
2267 | MODULE_LICENSE("GPL"); | |
1da177e4 | 2268 | |
bd4c625c LT |
2269 | module_init(init_reiserfs_fs); |
2270 | module_exit(exit_reiserfs_fs); |