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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 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/module.h> | |
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> | |
22 | #include <linux/smp_lock.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/blkdev.h> | |
25 | #include <linux/buffer_head.h> | |
26 | #include <linux/vfs.h> | |
27 | #include <linux/namespace.h> | |
28 | #include <linux/mount.h> | |
29 | #include <linux/namei.h> | |
30 | #include <linux/quotaops.h> | |
31 | ||
32 | struct file_system_type reiserfs_fs_type; | |
33 | ||
34 | static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; | |
35 | static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; | |
36 | static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; | |
37 | ||
38 | int is_reiserfs_3_5 (struct reiserfs_super_block * rs) | |
39 | { | |
40 | return !strncmp (rs->s_v1.s_magic, reiserfs_3_5_magic_string, | |
41 | strlen (reiserfs_3_5_magic_string)); | |
42 | } | |
43 | ||
44 | ||
45 | int is_reiserfs_3_6 (struct reiserfs_super_block * rs) | |
46 | { | |
47 | return !strncmp (rs->s_v1.s_magic, reiserfs_3_6_magic_string, | |
48 | strlen (reiserfs_3_6_magic_string)); | |
49 | } | |
50 | ||
51 | ||
52 | int is_reiserfs_jr (struct reiserfs_super_block * rs) | |
53 | { | |
54 | return !strncmp (rs->s_v1.s_magic, reiserfs_jr_magic_string, | |
55 | strlen (reiserfs_jr_magic_string)); | |
56 | } | |
57 | ||
58 | ||
59 | static int is_any_reiserfs_magic_string (struct reiserfs_super_block * rs) | |
60 | { | |
61 | return (is_reiserfs_3_5 (rs) || is_reiserfs_3_6 (rs) || | |
62 | is_reiserfs_jr (rs)); | |
63 | } | |
64 | ||
65 | static int reiserfs_remount (struct super_block * s, int * flags, char * data); | |
66 | static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf); | |
67 | ||
68 | static int reiserfs_sync_fs (struct super_block * s, int wait) | |
69 | { | |
70 | if (!(s->s_flags & MS_RDONLY)) { | |
71 | struct reiserfs_transaction_handle th; | |
72 | reiserfs_write_lock(s); | |
73 | if (!journal_begin(&th, s, 1)) | |
74 | if (!journal_end_sync(&th, s, 1)) | |
75 | reiserfs_flush_old_commits(s); | |
76 | s->s_dirt = 0; /* Even if it's not true. | |
77 | * We'll loop forever in sync_supers otherwise */ | |
78 | reiserfs_write_unlock(s); | |
79 | } else { | |
80 | s->s_dirt = 0; | |
81 | } | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static void reiserfs_write_super(struct super_block *s) | |
86 | { | |
87 | reiserfs_sync_fs(s, 1); | |
88 | } | |
89 | ||
90 | static void reiserfs_write_super_lockfs (struct super_block * s) | |
91 | { | |
92 | struct reiserfs_transaction_handle th ; | |
93 | reiserfs_write_lock(s); | |
94 | if (!(s->s_flags & MS_RDONLY)) { | |
95 | int err = journal_begin(&th, s, 1) ; | |
96 | if (err) { | |
97 | reiserfs_block_writes(&th) ; | |
98 | } else { | |
99 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); | |
100 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); | |
101 | reiserfs_block_writes(&th) ; | |
102 | journal_end_sync(&th, s, 1) ; | |
103 | } | |
104 | } | |
105 | s->s_dirt = 0; | |
106 | reiserfs_write_unlock(s); | |
107 | } | |
108 | ||
109 | static void reiserfs_unlockfs(struct super_block *s) { | |
110 | reiserfs_allow_writes(s) ; | |
111 | } | |
112 | ||
113 | extern const struct reiserfs_key MAX_KEY; | |
114 | ||
115 | ||
116 | /* this is used to delete "save link" when there are no items of a | |
117 | file it points to. It can either happen if unlink is completed but | |
118 | "save unlink" removal, or if file has both unlink and truncate | |
119 | pending and as unlink completes first (because key of "save link" | |
120 | protecting unlink is bigger that a key lf "save link" which | |
121 | protects truncate), so there left no items to make truncate | |
122 | completion on */ | |
123 | static int remove_save_link_only (struct super_block * s, struct reiserfs_key * key, int oid_free) | |
124 | { | |
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); | |
139 | } | |
140 | ||
141 | #ifdef CONFIG_QUOTA | |
142 | static int reiserfs_quota_on_mount(struct super_block *, int); | |
143 | #endif | |
144 | ||
145 | /* look for uncompleted unlinks and truncates and complete them */ | |
146 | static int finish_unfinished (struct super_block * s) | |
147 | { | |
148 | INITIALIZE_PATH (path); | |
149 | struct cpu_key max_cpu_key, obj_key; | |
150 | struct reiserfs_key save_link_key; | |
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; | |
159 | #ifdef CONFIG_QUOTA | |
160 | int i; | |
161 | int ms_active_set; | |
162 | #endif | |
163 | ||
164 | ||
165 | /* compose key to look for "save" links */ | |
166 | max_cpu_key.version = KEY_FORMAT_3_5; | |
167 | max_cpu_key.on_disk_key = MAX_KEY; | |
168 | max_cpu_key.key_length = 3; | |
169 | ||
170 | #ifdef CONFIG_QUOTA | |
171 | /* Needed for iput() to work correctly and not trash data */ | |
172 | if (s->s_flags & MS_ACTIVE) { | |
173 | ms_active_set = 0; | |
174 | } else { | |
175 | ms_active_set = 1; | |
176 | s->s_flags |= MS_ACTIVE; | |
177 | } | |
178 | /* Turn on quotas so that they are updated correctly */ | |
179 | for (i = 0; i < MAXQUOTAS; i++) { | |
180 | if (REISERFS_SB(s)->s_qf_names[i]) { | |
181 | int ret = reiserfs_quota_on_mount(s, i); | |
182 | if (ret < 0) | |
183 | reiserfs_warning(s, "reiserfs: cannot turn on journalled quota: error %d", ret); | |
184 | } | |
185 | } | |
186 | #endif | |
187 | ||
188 | done = 0; | |
189 | REISERFS_SB(s)->s_is_unlinked_ok = 1; | |
190 | while (!retval) { | |
191 | retval = search_item (s, &max_cpu_key, &path); | |
192 | if (retval != ITEM_NOT_FOUND) { | |
193 | reiserfs_warning (s, "vs-2140: finish_unfinished: search_by_key returned %d", | |
194 | retval); | |
195 | break; | |
196 | } | |
197 | ||
198 | bh = get_last_bh (&path); | |
199 | item_pos = get_item_pos (&path); | |
200 | if (item_pos != B_NR_ITEMS (bh)) { | |
201 | reiserfs_warning (s, "vs-2060: finish_unfinished: wrong position found"); | |
202 | break; | |
203 | } | |
204 | item_pos --; | |
205 | ih = B_N_PITEM_HEAD (bh, item_pos); | |
206 | ||
207 | if (le32_to_cpu (ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) | |
208 | /* there are no "save" links anymore */ | |
209 | break; | |
210 | ||
211 | save_link_key = ih->ih_key; | |
212 | if (is_indirect_le_ih (ih)) | |
213 | truncate = 1; | |
214 | else | |
215 | truncate = 0; | |
216 | ||
217 | /* reiserfs_iget needs k_dirid and k_objectid only */ | |
218 | item = B_I_PITEM (bh, ih); | |
219 | obj_key.on_disk_key.k_dir_id = le32_to_cpu (*(__u32 *)item); | |
220 | obj_key.on_disk_key.k_objectid = le32_to_cpu (ih->ih_key.k_objectid); | |
221 | obj_key.on_disk_key.u.k_offset_v1.k_offset = 0; | |
222 | obj_key.on_disk_key.u.k_offset_v1.k_uniqueness = 0; | |
223 | ||
224 | pathrelse (&path); | |
225 | ||
226 | inode = reiserfs_iget (s, &obj_key); | |
227 | if (!inode) { | |
228 | /* the unlink almost completed, it just did not manage to remove | |
229 | "save" link and release objectid */ | |
230 | reiserfs_warning (s, "vs-2180: finish_unfinished: iget failed for %K", | |
231 | &obj_key); | |
232 | retval = remove_save_link_only (s, &save_link_key, 1); | |
233 | continue; | |
234 | } | |
235 | ||
236 | if (!truncate && inode->i_nlink) { | |
237 | /* file is not unlinked */ | |
238 | reiserfs_warning (s, "vs-2185: finish_unfinished: file %K is not unlinked", | |
239 | &obj_key); | |
240 | retval = remove_save_link_only (s, &save_link_key, 0); | |
241 | continue; | |
242 | } | |
243 | DQUOT_INIT(inode); | |
244 | ||
245 | if (truncate && S_ISDIR (inode->i_mode) ) { | |
246 | /* We got a truncate request for a dir which is impossible. | |
247 | The only imaginable way is to execute unfinished truncate request | |
248 | then boot into old kernel, remove the file and create dir with | |
249 | the same key. */ | |
250 | reiserfs_warning(s, "green-2101: impossible truncate on a directory %k. Please report", INODE_PKEY (inode)); | |
251 | retval = remove_save_link_only (s, &save_link_key, 0); | |
252 | truncate = 0; | |
253 | iput (inode); | |
254 | continue; | |
255 | } | |
256 | ||
257 | if (truncate) { | |
258 | REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask; | |
259 | /* not completed truncate found. New size was committed together | |
260 | with "save" link */ | |
261 | reiserfs_info (s, "Truncating %k to %Ld ..", | |
262 | INODE_PKEY (inode), inode->i_size); | |
263 | reiserfs_truncate_file (inode, 0/*don't update modification time*/); | |
264 | retval = remove_save_link (inode, truncate); | |
265 | } else { | |
266 | REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask; | |
267 | /* not completed unlink (rmdir) found */ | |
268 | reiserfs_info (s, "Removing %k..", INODE_PKEY (inode)); | |
269 | /* removal gets completed in iput */ | |
270 | retval = 0; | |
271 | } | |
272 | ||
273 | iput (inode); | |
274 | printk ("done\n"); | |
275 | done ++; | |
276 | } | |
277 | REISERFS_SB(s)->s_is_unlinked_ok = 0; | |
278 | ||
279 | #ifdef CONFIG_QUOTA | |
280 | /* Turn quotas off */ | |
281 | for (i = 0; i < MAXQUOTAS; i++) { | |
282 | if (sb_dqopt(s)->files[i]) | |
283 | vfs_quota_off_mount(s, i); | |
284 | } | |
285 | if (ms_active_set) | |
286 | /* Restore the flag back */ | |
287 | s->s_flags &= ~MS_ACTIVE; | |
288 | #endif | |
289 | pathrelse (&path); | |
290 | if (done) | |
291 | reiserfs_info (s, "There were %d uncompleted unlinks/truncates. " | |
292 | "Completed\n", done); | |
293 | return retval; | |
294 | } | |
295 | ||
296 | /* to protect file being unlinked from getting lost we "safe" link files | |
297 | being unlinked. This link will be deleted in the same transaction with last | |
298 | item of file. mounting the filesytem we scan all these links and remove | |
299 | files which almost got lost */ | |
300 | void add_save_link (struct reiserfs_transaction_handle * th, | |
301 | struct inode * inode, int truncate) | |
302 | { | |
303 | INITIALIZE_PATH (path); | |
304 | int retval; | |
305 | struct cpu_key key; | |
306 | struct item_head ih; | |
307 | __u32 link; | |
308 | ||
309 | BUG_ON (!th->t_trans_id); | |
310 | ||
311 | /* file can only get one "save link" of each kind */ | |
312 | RFALSE( truncate && | |
313 | ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ), | |
314 | "saved link already exists for truncated inode %lx", | |
315 | ( long ) inode -> i_ino ); | |
316 | RFALSE( !truncate && | |
317 | ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ), | |
318 | "saved link already exists for unlinked inode %lx", | |
319 | ( long ) inode -> i_ino ); | |
320 | ||
321 | /* setup key of "save" link */ | |
322 | key.version = KEY_FORMAT_3_5; | |
323 | key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; | |
324 | key.on_disk_key.k_objectid = inode->i_ino; | |
325 | if (!truncate) { | |
326 | /* unlink, rmdir, rename */ | |
327 | set_cpu_key_k_offset (&key, 1 + inode->i_sb->s_blocksize); | |
328 | set_cpu_key_k_type (&key, TYPE_DIRECT); | |
329 | ||
330 | /* item head of "safe" link */ | |
331 | make_le_item_head (&ih, &key, key.version, 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, | |
332 | 4/*length*/, 0xffff/*free space*/); | |
333 | } else { | |
334 | /* truncate */ | |
335 | if (S_ISDIR (inode->i_mode)) | |
336 | reiserfs_warning(inode->i_sb, "green-2102: Adding a truncate savelink for a directory %k! Please report", INODE_PKEY(inode)); | |
337 | set_cpu_key_k_offset (&key, 1); | |
338 | set_cpu_key_k_type (&key, TYPE_INDIRECT); | |
339 | ||
340 | /* item head of "safe" link */ | |
341 | make_le_item_head (&ih, &key, key.version, 1, TYPE_INDIRECT, | |
342 | 4/*length*/, 0/*free space*/); | |
343 | } | |
344 | key.key_length = 3; | |
345 | ||
346 | /* look for its place in the tree */ | |
347 | retval = search_item (inode->i_sb, &key, &path); | |
348 | if (retval != ITEM_NOT_FOUND) { | |
349 | if ( retval != -ENOSPC ) | |
350 | reiserfs_warning (inode->i_sb, "vs-2100: add_save_link:" | |
351 | "search_by_key (%K) returned %d", &key, retval); | |
352 | pathrelse (&path); | |
353 | return; | |
354 | } | |
355 | ||
356 | /* body of "save" link */ | |
357 | link = INODE_PKEY (inode)->k_dir_id; | |
358 | ||
359 | /* put "save" link inot tree, don't charge quota to anyone */ | |
360 | retval = reiserfs_insert_item (th, &path, &key, &ih, NULL, (char *)&link); | |
361 | if (retval) { | |
362 | if (retval != -ENOSPC) | |
363 | reiserfs_warning (inode->i_sb, "vs-2120: add_save_link: insert_item returned %d", | |
364 | retval); | |
365 | } else { | |
366 | if( truncate ) | |
367 | REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask; | |
368 | else | |
369 | REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask; | |
370 | } | |
371 | } | |
372 | ||
373 | ||
374 | /* this opens transaction unlike add_save_link */ | |
375 | int remove_save_link (struct inode * inode, int truncate) | |
376 | { | |
377 | struct reiserfs_transaction_handle th; | |
378 | struct reiserfs_key key; | |
379 | int err; | |
380 | ||
381 | /* we are going to do one balancing only */ | |
382 | err = journal_begin (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
383 | if (err) | |
384 | return err; | |
385 | ||
386 | /* setup key of "save" link */ | |
387 | key.k_dir_id = cpu_to_le32 (MAX_KEY_OBJECTID); | |
388 | key.k_objectid = INODE_PKEY (inode)->k_objectid; | |
389 | if (!truncate) { | |
390 | /* unlink, rmdir, rename */ | |
391 | set_le_key_k_offset (KEY_FORMAT_3_5, &key, | |
392 | 1 + inode->i_sb->s_blocksize); | |
393 | set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_DIRECT); | |
394 | } else { | |
395 | /* truncate */ | |
396 | set_le_key_k_offset (KEY_FORMAT_3_5, &key, 1); | |
397 | set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_INDIRECT); | |
398 | } | |
399 | ||
400 | if( ( truncate && | |
401 | ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ) ) || | |
402 | ( !truncate && | |
403 | ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ) ) ) | |
404 | /* don't take quota bytes from anywhere */ | |
405 | reiserfs_delete_solid_item (&th, NULL, &key); | |
406 | if (!truncate) { | |
407 | reiserfs_release_objectid (&th, inode->i_ino); | |
408 | REISERFS_I(inode) -> i_flags &= ~i_link_saved_unlink_mask; | |
409 | } else | |
410 | REISERFS_I(inode) -> i_flags &= ~i_link_saved_truncate_mask; | |
411 | ||
412 | return journal_end (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); | |
413 | } | |
414 | ||
415 | ||
416 | static void reiserfs_put_super (struct super_block * s) | |
417 | { | |
418 | int i; | |
419 | struct reiserfs_transaction_handle th ; | |
420 | th.t_trans_id = 0; | |
421 | ||
422 | if (REISERFS_SB(s)->xattr_root) { | |
423 | d_invalidate (REISERFS_SB(s)->xattr_root); | |
424 | dput (REISERFS_SB(s)->xattr_root); | |
425 | } | |
426 | ||
427 | if (REISERFS_SB(s)->priv_root) { | |
428 | d_invalidate (REISERFS_SB(s)->priv_root); | |
429 | dput (REISERFS_SB(s)->priv_root); | |
430 | } | |
431 | ||
432 | /* change file system state to current state if it was mounted with read-write permissions */ | |
433 | if (!(s->s_flags & MS_RDONLY)) { | |
434 | if (!journal_begin(&th, s, 10)) { | |
435 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; | |
436 | set_sb_umount_state( SB_DISK_SUPER_BLOCK(s), REISERFS_SB(s)->s_mount_state ); | |
437 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); | |
438 | } | |
439 | } | |
440 | ||
441 | /* note, journal_release checks for readonly mount, and can decide not | |
442 | ** to do a journal_end | |
443 | */ | |
444 | journal_release(&th, s) ; | |
445 | ||
446 | for (i = 0; i < SB_BMAP_NR (s); i ++) | |
447 | brelse (SB_AP_BITMAP (s)[i].bh); | |
448 | ||
449 | vfree (SB_AP_BITMAP (s)); | |
450 | ||
451 | brelse (SB_BUFFER_WITH_SB (s)); | |
452 | ||
453 | print_statistics (s); | |
454 | ||
455 | if (REISERFS_SB(s)->s_kmallocs != 0) { | |
456 | reiserfs_warning (s, "vs-2004: reiserfs_put_super: allocated memory left %d", | |
457 | REISERFS_SB(s)->s_kmallocs); | |
458 | } | |
459 | ||
460 | if (REISERFS_SB(s)->reserved_blocks != 0) { | |
461 | reiserfs_warning (s, "green-2005: reiserfs_put_super: reserved blocks left %d", | |
462 | REISERFS_SB(s)->reserved_blocks); | |
463 | } | |
464 | ||
465 | reiserfs_proc_info_done( s ); | |
466 | ||
467 | kfree(s->s_fs_info); | |
468 | s->s_fs_info = NULL; | |
469 | ||
470 | return; | |
471 | } | |
472 | ||
473 | static kmem_cache_t * reiserfs_inode_cachep; | |
474 | ||
475 | static struct inode *reiserfs_alloc_inode(struct super_block *sb) | |
476 | { | |
477 | struct reiserfs_inode_info *ei; | |
478 | ei = (struct reiserfs_inode_info *)kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL); | |
479 | if (!ei) | |
480 | return NULL; | |
481 | return &ei->vfs_inode; | |
482 | } | |
483 | ||
484 | static void reiserfs_destroy_inode(struct inode *inode) | |
485 | { | |
486 | kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); | |
487 | } | |
488 | ||
489 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) | |
490 | { | |
491 | struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *) foo; | |
492 | ||
493 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
494 | SLAB_CTOR_CONSTRUCTOR) { | |
495 | INIT_LIST_HEAD(&ei->i_prealloc_list) ; | |
496 | inode_init_once(&ei->vfs_inode); | |
497 | ei->i_acl_access = NULL; | |
498 | ei->i_acl_default = NULL; | |
499 | } | |
500 | } | |
501 | ||
502 | static int init_inodecache(void) | |
503 | { | |
504 | reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", | |
505 | sizeof(struct reiserfs_inode_info), | |
506 | 0, SLAB_RECLAIM_ACCOUNT, | |
507 | init_once, NULL); | |
508 | if (reiserfs_inode_cachep == NULL) | |
509 | return -ENOMEM; | |
510 | return 0; | |
511 | } | |
512 | ||
513 | static void destroy_inodecache(void) | |
514 | { | |
515 | if (kmem_cache_destroy(reiserfs_inode_cachep)) | |
516 | reiserfs_warning (NULL, "reiserfs_inode_cache: not all structures were freed"); | |
517 | } | |
518 | ||
519 | /* we don't mark inodes dirty, we just log them */ | |
520 | static void reiserfs_dirty_inode (struct inode * inode) { | |
521 | struct reiserfs_transaction_handle th ; | |
522 | ||
523 | int err = 0; | |
524 | if (inode->i_sb->s_flags & MS_RDONLY) { | |
525 | reiserfs_warning(inode->i_sb, "clm-6006: writing inode %lu on readonly FS", | |
526 | inode->i_ino) ; | |
527 | return ; | |
528 | } | |
529 | reiserfs_write_lock(inode->i_sb); | |
530 | ||
531 | /* this is really only used for atime updates, so they don't have | |
532 | ** to be included in O_SYNC or fsync | |
533 | */ | |
534 | err = journal_begin(&th, inode->i_sb, 1) ; | |
535 | if (err) { | |
536 | reiserfs_write_unlock (inode->i_sb); | |
537 | return; | |
538 | } | |
539 | reiserfs_update_sd (&th, inode); | |
540 | journal_end(&th, inode->i_sb, 1) ; | |
541 | reiserfs_write_unlock(inode->i_sb); | |
542 | } | |
543 | ||
544 | static void reiserfs_clear_inode (struct inode *inode) | |
545 | { | |
546 | struct posix_acl *acl; | |
547 | ||
548 | acl = REISERFS_I(inode)->i_acl_access; | |
549 | if (acl && !IS_ERR (acl)) | |
550 | posix_acl_release (acl); | |
551 | REISERFS_I(inode)->i_acl_access = NULL; | |
552 | ||
553 | acl = REISERFS_I(inode)->i_acl_default; | |
554 | if (acl && !IS_ERR (acl)) | |
555 | posix_acl_release (acl); | |
556 | REISERFS_I(inode)->i_acl_default = NULL; | |
557 | } | |
558 | ||
559 | #ifdef CONFIG_QUOTA | |
560 | static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, size_t, loff_t); | |
561 | static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, loff_t); | |
562 | #endif | |
563 | ||
564 | static struct super_operations reiserfs_sops = | |
565 | { | |
566 | .alloc_inode = reiserfs_alloc_inode, | |
567 | .destroy_inode = reiserfs_destroy_inode, | |
568 | .write_inode = reiserfs_write_inode, | |
569 | .dirty_inode = reiserfs_dirty_inode, | |
570 | .delete_inode = reiserfs_delete_inode, | |
571 | .clear_inode = reiserfs_clear_inode, | |
572 | .put_super = reiserfs_put_super, | |
573 | .write_super = reiserfs_write_super, | |
574 | .sync_fs = reiserfs_sync_fs, | |
575 | .write_super_lockfs = reiserfs_write_super_lockfs, | |
576 | .unlockfs = reiserfs_unlockfs, | |
577 | .statfs = reiserfs_statfs, | |
578 | .remount_fs = reiserfs_remount, | |
579 | #ifdef CONFIG_QUOTA | |
580 | .quota_read = reiserfs_quota_read, | |
581 | .quota_write = reiserfs_quota_write, | |
582 | #endif | |
583 | }; | |
584 | ||
585 | #ifdef CONFIG_QUOTA | |
586 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
587 | ||
588 | static int reiserfs_dquot_initialize(struct inode *, int); | |
589 | static int reiserfs_dquot_drop(struct inode *); | |
590 | static int reiserfs_write_dquot(struct dquot *); | |
591 | static int reiserfs_acquire_dquot(struct dquot *); | |
592 | static int reiserfs_release_dquot(struct dquot *); | |
593 | static int reiserfs_mark_dquot_dirty(struct dquot *); | |
594 | static int reiserfs_write_info(struct super_block *, int); | |
595 | static int reiserfs_quota_on(struct super_block *, int, int, char *); | |
596 | ||
597 | static struct dquot_operations reiserfs_quota_operations = | |
598 | { | |
599 | .initialize = reiserfs_dquot_initialize, | |
600 | .drop = reiserfs_dquot_drop, | |
601 | .alloc_space = dquot_alloc_space, | |
602 | .alloc_inode = dquot_alloc_inode, | |
603 | .free_space = dquot_free_space, | |
604 | .free_inode = dquot_free_inode, | |
605 | .transfer = dquot_transfer, | |
606 | .write_dquot = reiserfs_write_dquot, | |
607 | .acquire_dquot = reiserfs_acquire_dquot, | |
608 | .release_dquot = reiserfs_release_dquot, | |
609 | .mark_dirty = reiserfs_mark_dquot_dirty, | |
610 | .write_info = reiserfs_write_info, | |
611 | }; | |
612 | ||
613 | static struct quotactl_ops reiserfs_qctl_operations = | |
614 | { | |
615 | .quota_on = reiserfs_quota_on, | |
616 | .quota_off = vfs_quota_off, | |
617 | .quota_sync = vfs_quota_sync, | |
618 | .get_info = vfs_get_dqinfo, | |
619 | .set_info = vfs_set_dqinfo, | |
620 | .get_dqblk = vfs_get_dqblk, | |
621 | .set_dqblk = vfs_set_dqblk, | |
622 | }; | |
623 | #endif | |
624 | ||
625 | static struct export_operations reiserfs_export_ops = { | |
626 | .encode_fh = reiserfs_encode_fh, | |
627 | .decode_fh = reiserfs_decode_fh, | |
628 | .get_parent = reiserfs_get_parent, | |
629 | .get_dentry = reiserfs_get_dentry, | |
630 | } ; | |
631 | ||
632 | /* this struct is used in reiserfs_getopt () for containing the value for those | |
633 | mount options that have values rather than being toggles. */ | |
634 | typedef struct { | |
635 | char * value; | |
636 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
637 | value is found, 0 is no bits are to be changed. */ | |
638 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
639 | value is found, 0 is no bits are to be changed. This is | |
640 | applied BEFORE setmask */ | |
641 | } arg_desc_t; | |
642 | ||
643 | /* Set this bit in arg_required to allow empty arguments */ | |
644 | #define REISERFS_OPT_ALLOWEMPTY 31 | |
645 | ||
646 | /* this struct is used in reiserfs_getopt() for describing the set of reiserfs | |
647 | mount options */ | |
648 | typedef struct { | |
649 | char * option_name; | |
650 | int arg_required; /* 0 if argument is not required, not 0 otherwise */ | |
651 | const arg_desc_t * values; /* list of values accepted by an option */ | |
652 | int setmask; /* bitmask which is to set on mount_options bitmask when this | |
653 | value is found, 0 is no bits are to be changed. */ | |
654 | int clrmask; /* bitmask which is to clear on mount_options bitmask when this | |
655 | value is found, 0 is no bits are to be changed. This is | |
656 | applied BEFORE setmask */ | |
657 | } opt_desc_t; | |
658 | ||
659 | /* possible values for -o data= */ | |
660 | static const arg_desc_t logging_mode[] = { | |
661 | {"ordered", 1<<REISERFS_DATA_ORDERED, (1<<REISERFS_DATA_LOG|1<<REISERFS_DATA_WRITEBACK)}, | |
662 | {"journal", 1<<REISERFS_DATA_LOG, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_WRITEBACK)}, | |
663 | {"writeback", 1<<REISERFS_DATA_WRITEBACK, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_LOG)}, | |
664 | {NULL, 0} | |
665 | }; | |
666 | ||
667 | /* possible values for -o barrier= */ | |
668 | static const arg_desc_t barrier_mode[] = { | |
669 | {"none", 1<<REISERFS_BARRIER_NONE, 1<<REISERFS_BARRIER_FLUSH}, | |
670 | {"flush", 1<<REISERFS_BARRIER_FLUSH, 1<<REISERFS_BARRIER_NONE}, | |
671 | {NULL, 0} | |
672 | }; | |
673 | ||
674 | /* possible values for "-o block-allocator=" and bits which are to be set in | |
675 | s_mount_opt of reiserfs specific part of in-core super block */ | |
676 | static const arg_desc_t balloc[] = { | |
677 | {"noborder", 1<<REISERFS_NO_BORDER, 0}, | |
678 | {"border", 0, 1<<REISERFS_NO_BORDER}, | |
679 | {"no_unhashed_relocation", 1<<REISERFS_NO_UNHASHED_RELOCATION, 0}, | |
680 | {"hashed_relocation", 1<<REISERFS_HASHED_RELOCATION, 0}, | |
681 | {"test4", 1<<REISERFS_TEST4, 0}, | |
682 | {"notest4", 0, 1<<REISERFS_TEST4}, | |
683 | {NULL, 0, 0} | |
684 | }; | |
685 | ||
686 | static const arg_desc_t tails[] = { | |
687 | {"on", 1<<REISERFS_LARGETAIL, 1<<REISERFS_SMALLTAIL}, | |
688 | {"off", 0, (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)}, | |
689 | {"small", 1<<REISERFS_SMALLTAIL, 1<<REISERFS_LARGETAIL}, | |
690 | {NULL, 0, 0} | |
691 | }; | |
692 | ||
693 | static const arg_desc_t error_actions[] = { | |
694 | {"panic", 1 << REISERFS_ERROR_PANIC, | |
695 | (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, | |
696 | {"ro-remount", 1 << REISERFS_ERROR_RO, | |
697 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, | |
698 | #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG | |
699 | {"continue", 1 << REISERFS_ERROR_CONTINUE, | |
700 | (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, | |
701 | #endif | |
702 | {NULL, 0, 0}, | |
703 | }; | |
704 | ||
705 | int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k. | |
706 | There might be broken applications that are | |
707 | confused by this. Use nolargeio mount option | |
708 | to get usual i/o size = PAGE_SIZE. | |
709 | */ | |
710 | ||
711 | /* proceed only one option from a list *cur - string containing of mount options | |
712 | opts - array of options which are accepted | |
713 | opt_arg - if option is found and requires an argument and if it is specifed | |
714 | in the input - pointer to the argument is stored here | |
715 | bit_flags - if option requires to set a certain bit - it is set here | |
716 | return -1 if unknown option is found, opt->arg_required otherwise */ | |
717 | static int reiserfs_getopt ( struct super_block * s, char ** cur, opt_desc_t * opts, char ** opt_arg, | |
718 | unsigned long * bit_flags) | |
719 | { | |
720 | char * p; | |
721 | /* foo=bar, | |
722 | ^ ^ ^ | |
723 | | | +-- option_end | |
724 | | +-- arg_start | |
725 | +-- option_start | |
726 | */ | |
727 | const opt_desc_t * opt; | |
728 | const arg_desc_t * arg; | |
729 | ||
730 | ||
731 | p = *cur; | |
732 | ||
733 | /* assume argument cannot contain commas */ | |
734 | *cur = strchr (p, ','); | |
735 | if (*cur) { | |
736 | *(*cur) = '\0'; | |
737 | (*cur) ++; | |
738 | } | |
739 | ||
740 | if ( !strncmp (p, "alloc=", 6) ) { | |
741 | /* Ugly special case, probably we should redo options parser so that | |
742 | it can understand several arguments for some options, also so that | |
743 | it can fill several bitfields with option values. */ | |
744 | if ( reiserfs_parse_alloc_options( s, p + 6) ) { | |
745 | return -1; | |
746 | } else { | |
747 | return 0; | |
748 | } | |
749 | } | |
750 | ||
751 | ||
752 | /* for every option in the list */ | |
753 | for (opt = opts; opt->option_name; opt ++) { | |
754 | if (!strncmp (p, opt->option_name, strlen (opt->option_name))) { | |
755 | if (bit_flags) { | |
756 | if (opt->clrmask == (1 << REISERFS_UNSUPPORTED_OPT)) | |
757 | reiserfs_warning (s, "%s not supported.", p); | |
758 | else | |
759 | *bit_flags &= ~opt->clrmask; | |
760 | if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT)) | |
761 | reiserfs_warning (s, "%s not supported.", p); | |
762 | else | |
763 | *bit_flags |= opt->setmask; | |
764 | } | |
765 | break; | |
766 | } | |
767 | } | |
768 | if (!opt->option_name) { | |
769 | reiserfs_warning (s, "unknown mount option \"%s\"", p); | |
770 | return -1; | |
771 | } | |
772 | ||
773 | p += strlen (opt->option_name); | |
774 | switch (*p) { | |
775 | case '=': | |
776 | if (!opt->arg_required) { | |
777 | reiserfs_warning (s, "the option \"%s\" does not require an argument", | |
778 | opt->option_name); | |
779 | return -1; | |
780 | } | |
781 | break; | |
782 | ||
783 | case 0: | |
784 | if (opt->arg_required) { | |
785 | reiserfs_warning (s, "the option \"%s\" requires an argument", opt->option_name); | |
786 | return -1; | |
787 | } | |
788 | break; | |
789 | default: | |
790 | reiserfs_warning (s, "head of option \"%s\" is only correct", opt->option_name); | |
791 | return -1; | |
792 | } | |
793 | ||
794 | /* move to the argument, or to next option if argument is not required */ | |
795 | p ++; | |
796 | ||
797 | if ( opt->arg_required && !(opt->arg_required & (1<<REISERFS_OPT_ALLOWEMPTY)) && !strlen (p) ) { | |
798 | /* this catches "option=," if not allowed */ | |
799 | reiserfs_warning (s, "empty argument for \"%s\"", opt->option_name); | |
800 | return -1; | |
801 | } | |
802 | ||
803 | if (!opt->values) { | |
804 | /* *=NULLopt_arg contains pointer to argument */ | |
805 | *opt_arg = p; | |
806 | return opt->arg_required & ~(1<<REISERFS_OPT_ALLOWEMPTY); | |
807 | } | |
808 | ||
809 | /* values possible for this option are listed in opt->values */ | |
810 | for (arg = opt->values; arg->value; arg ++) { | |
811 | if (!strcmp (p, arg->value)) { | |
812 | if (bit_flags) { | |
813 | *bit_flags &= ~arg->clrmask; | |
814 | *bit_flags |= arg->setmask; | |
815 | } | |
816 | return opt->arg_required; | |
817 | } | |
818 | } | |
819 | ||
820 | reiserfs_warning (s, "bad value \"%s\" for option \"%s\"", p, opt->option_name); | |
821 | return -1; | |
822 | } | |
823 | ||
824 | /* returns 0 if something is wrong in option string, 1 - otherwise */ | |
825 | static int reiserfs_parse_options (struct super_block * s, char * options, /* string given via mount's -o */ | |
826 | unsigned long * mount_options, | |
827 | /* after the parsing phase, contains the | |
828 | collection of bitflags defining what | |
829 | mount options were selected. */ | |
830 | unsigned long * blocks, /* strtol-ed from NNN of resize=NNN */ | |
831 | char ** jdev_name, | |
832 | unsigned int * commit_max_age) | |
833 | { | |
834 | int c; | |
835 | char * arg = NULL; | |
836 | char * pos; | |
837 | opt_desc_t opts[] = { | |
838 | /* Compatibility stuff, so that -o notail for old setups still work */ | |
839 | {"tails", .arg_required = 't', .values = tails}, | |
840 | {"notail", .clrmask = (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)}, | |
841 | {"conv", .setmask = 1<<REISERFS_CONVERT}, | |
842 | {"attrs", .setmask = 1<<REISERFS_ATTRS}, | |
843 | {"noattrs", .clrmask = 1<<REISERFS_ATTRS}, | |
844 | #ifdef CONFIG_REISERFS_FS_XATTR | |
845 | {"user_xattr", .setmask = 1<<REISERFS_XATTRS_USER}, | |
846 | {"nouser_xattr",.clrmask = 1<<REISERFS_XATTRS_USER}, | |
847 | #else | |
848 | {"user_xattr", .setmask = 1<<REISERFS_UNSUPPORTED_OPT}, | |
849 | {"nouser_xattr",.clrmask = 1<<REISERFS_UNSUPPORTED_OPT}, | |
850 | #endif | |
851 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
852 | {"acl", .setmask = 1<<REISERFS_POSIXACL}, | |
853 | {"noacl", .clrmask = 1<<REISERFS_POSIXACL}, | |
854 | #else | |
855 | {"acl", .setmask = 1<<REISERFS_UNSUPPORTED_OPT}, | |
856 | {"noacl", .clrmask = 1<<REISERFS_UNSUPPORTED_OPT}, | |
857 | #endif | |
858 | {"nolog",}, /* This is unsupported */ | |
859 | {"replayonly", .setmask = 1<<REPLAYONLY}, | |
860 | {"block-allocator", .arg_required = 'a', .values = balloc}, | |
861 | {"data", .arg_required = 'd', .values = logging_mode}, | |
862 | {"barrier", .arg_required = 'b', .values = barrier_mode}, | |
863 | {"resize", .arg_required = 'r', .values = NULL}, | |
864 | {"jdev", .arg_required = 'j', .values = NULL}, | |
865 | {"nolargeio", .arg_required = 'w', .values = NULL}, | |
866 | {"commit", .arg_required = 'c', .values = NULL}, | |
867 | {"usrquota",}, | |
868 | {"grpquota",}, | |
869 | {"errors", .arg_required = 'e', .values = error_actions}, | |
870 | {"usrjquota", .arg_required = 'u'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL}, | |
871 | {"grpjquota", .arg_required = 'g'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL}, | |
872 | {"jqfmt", .arg_required = 'f', .values = NULL}, | |
873 | {NULL,} | |
874 | }; | |
875 | ||
876 | *blocks = 0; | |
877 | if (!options || !*options) | |
878 | /* use default configuration: create tails, journaling on, no | |
879 | conversion to newest format */ | |
880 | return 1; | |
881 | ||
882 | for (pos = options; pos; ) { | |
883 | c = reiserfs_getopt (s, &pos, opts, &arg, mount_options); | |
884 | if (c == -1) | |
885 | /* wrong option is given */ | |
886 | return 0; | |
887 | ||
888 | if (c == 'r') { | |
889 | char * p; | |
890 | ||
891 | p = NULL; | |
892 | /* "resize=NNN" */ | |
893 | *blocks = simple_strtoul (arg, &p, 0); | |
894 | if (*p != '\0') { | |
895 | /* NNN does not look like a number */ | |
896 | reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg); | |
897 | return 0; | |
898 | } | |
899 | } | |
900 | ||
901 | if ( c == 'c' ) { | |
902 | char *p = NULL; | |
903 | unsigned long val = simple_strtoul (arg, &p, 0); | |
904 | /* commit=NNN (time in seconds) */ | |
905 | if ( *p != '\0' || val >= (unsigned int)-1) { | |
906 | reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg); return 0; | |
907 | } | |
908 | *commit_max_age = (unsigned int)val; | |
909 | } | |
910 | ||
911 | if ( c == 'w' ) { | |
912 | char *p=NULL; | |
913 | int val = simple_strtoul (arg, &p, 0); | |
914 | ||
915 | if ( *p != '\0') { | |
916 | reiserfs_warning (s, "reiserfs_parse_options: non-numeric value %s for nolargeio option", arg); | |
917 | return 0; | |
918 | } | |
919 | if ( val ) | |
920 | reiserfs_default_io_size = PAGE_SIZE; | |
921 | else | |
922 | reiserfs_default_io_size = 128 * 1024; | |
923 | } | |
924 | ||
925 | if (c == 'j') { | |
926 | if (arg && *arg && jdev_name) { | |
927 | if ( *jdev_name ) { //Hm, already assigned? | |
928 | reiserfs_warning (s, "reiserfs_parse_options: journal device was already specified to be %s", *jdev_name); | |
929 | return 0; | |
930 | } | |
931 | *jdev_name = arg; | |
932 | } | |
933 | } | |
934 | ||
935 | #ifdef CONFIG_QUOTA | |
936 | if (c == 'u' || c == 'g') { | |
937 | int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; | |
938 | ||
939 | if (sb_any_quota_enabled(s)) { | |
940 | reiserfs_warning(s, "reiserfs_parse_options: cannot change journalled quota options when quota turned on."); | |
941 | return 0; | |
942 | } | |
943 | if (*arg) { /* Some filename specified? */ | |
944 | if (REISERFS_SB(s)->s_qf_names[qtype] && strcmp(REISERFS_SB(s)->s_qf_names[qtype], arg)) { | |
945 | reiserfs_warning(s, "reiserfs_parse_options: %s quota file already specified.", QTYPE2NAME(qtype)); | |
946 | return 0; | |
947 | } | |
948 | if (strchr(arg, '/')) { | |
949 | reiserfs_warning(s, "reiserfs_parse_options: quotafile must be on filesystem root."); | |
950 | return 0; | |
951 | } | |
952 | REISERFS_SB(s)->s_qf_names[qtype] = kmalloc(strlen(arg)+1, GFP_KERNEL); | |
953 | if (!REISERFS_SB(s)->s_qf_names[qtype]) { | |
954 | reiserfs_warning(s, "reiserfs_parse_options: not enough memory for storing quotafile name."); | |
955 | return 0; | |
956 | } | |
957 | strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg); | |
958 | } | |
959 | else { | |
960 | if (REISERFS_SB(s)->s_qf_names[qtype]) { | |
961 | kfree(REISERFS_SB(s)->s_qf_names[qtype]); | |
962 | REISERFS_SB(s)->s_qf_names[qtype] = NULL; | |
963 | } | |
964 | } | |
965 | } | |
966 | if (c == 'f') { | |
967 | if (!strcmp(arg, "vfsold")) | |
968 | REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD; | |
969 | else if (!strcmp(arg, "vfsv0")) | |
970 | REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0; | |
971 | else { | |
972 | reiserfs_warning(s, "reiserfs_parse_options: unknown quota format specified."); | |
973 | return 0; | |
974 | } | |
975 | } | |
976 | #else | |
977 | if (c == 'u' || c == 'g' || c == 'f') { | |
978 | reiserfs_warning(s, "reiserfs_parse_options: journalled quota options not supported."); | |
979 | return 0; | |
980 | } | |
981 | #endif | |
982 | } | |
983 | ||
984 | #ifdef CONFIG_QUOTA | |
985 | if (!REISERFS_SB(s)->s_jquota_fmt && (REISERFS_SB(s)->s_qf_names[USRQUOTA] || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) { | |
986 | reiserfs_warning(s, "reiserfs_parse_options: journalled quota format not specified."); | |
987 | return 0; | |
988 | } | |
989 | #endif | |
990 | return 1; | |
991 | } | |
992 | ||
993 | static void switch_data_mode(struct super_block *s, unsigned long mode) { | |
994 | REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | | |
995 | (1 << REISERFS_DATA_ORDERED) | | |
996 | (1 << REISERFS_DATA_WRITEBACK)); | |
997 | REISERFS_SB(s)->s_mount_opt |= (1 << mode); | |
998 | } | |
999 | ||
1000 | static void handle_data_mode(struct super_block *s, unsigned long mount_options) | |
1001 | { | |
1002 | if (mount_options & (1 << REISERFS_DATA_LOG)) { | |
1003 | if (!reiserfs_data_log(s)) { | |
1004 | switch_data_mode(s, REISERFS_DATA_LOG); | |
1005 | reiserfs_info (s, "switching to journaled data mode\n"); | |
1006 | } | |
1007 | } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { | |
1008 | if (!reiserfs_data_ordered(s)) { | |
1009 | switch_data_mode(s, REISERFS_DATA_ORDERED); | |
1010 | reiserfs_info (s, "switching to ordered data mode\n"); | |
1011 | } | |
1012 | } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { | |
1013 | if (!reiserfs_data_writeback(s)) { | |
1014 | switch_data_mode(s, REISERFS_DATA_WRITEBACK); | |
1015 | reiserfs_info (s, "switching to writeback data mode\n"); | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | static void handle_barrier_mode(struct super_block *s, unsigned long bits) { | |
1021 | int flush = (1 << REISERFS_BARRIER_FLUSH); | |
1022 | int none = (1 << REISERFS_BARRIER_NONE); | |
1023 | int all_barrier = flush | none; | |
1024 | ||
1025 | if (bits & all_barrier) { | |
1026 | REISERFS_SB(s)->s_mount_opt &= ~all_barrier; | |
1027 | if (bits & flush) { | |
1028 | REISERFS_SB(s)->s_mount_opt |= flush; | |
1029 | printk("reiserfs: enabling write barrier flush mode\n"); | |
1030 | } else if (bits & none) { | |
1031 | REISERFS_SB(s)->s_mount_opt |= none; | |
1032 | printk("reiserfs: write barriers turned off\n"); | |
1033 | } | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | static void handle_attrs( struct super_block *s ) | |
1038 | { | |
1039 | struct reiserfs_super_block * rs; | |
1040 | ||
1041 | if( reiserfs_attrs( s ) ) { | |
1042 | rs = SB_DISK_SUPER_BLOCK (s); | |
1043 | if( old_format_only(s) ) { | |
1044 | reiserfs_warning(s, "reiserfs: cannot support attributes on 3.5.x disk format" ); | |
1045 | REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS ); | |
1046 | return; | |
1047 | } | |
1048 | if( !( le32_to_cpu( rs -> s_flags ) & reiserfs_attrs_cleared ) ) { | |
1049 | reiserfs_warning(s, "reiserfs: cannot support attributes until flag is set in super-block" ); | |
1050 | REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS ); | |
1051 | } | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | static int reiserfs_remount (struct super_block * s, int * mount_flags, char * arg) | |
1056 | { | |
1057 | struct reiserfs_super_block * rs; | |
1058 | struct reiserfs_transaction_handle th ; | |
1059 | unsigned long blocks; | |
1060 | unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; | |
1061 | unsigned long safe_mask = 0; | |
1062 | unsigned int commit_max_age = (unsigned int)-1; | |
1063 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1064 | int err; | |
1065 | #ifdef CONFIG_QUOTA | |
1066 | int i; | |
1067 | #endif | |
1068 | ||
1069 | rs = SB_DISK_SUPER_BLOCK (s); | |
1070 | ||
1071 | if (!reiserfs_parse_options(s, arg, &mount_options, &blocks, NULL, &commit_max_age)) { | |
1072 | #ifdef CONFIG_QUOTA | |
1073 | for (i = 0; i < MAXQUOTAS; i++) | |
1074 | if (REISERFS_SB(s)->s_qf_names[i]) { | |
1075 | kfree(REISERFS_SB(s)->s_qf_names[i]); | |
1076 | REISERFS_SB(s)->s_qf_names[i] = NULL; | |
1077 | } | |
1078 | #endif | |
1079 | return -EINVAL; | |
1080 | } | |
1081 | ||
1082 | handle_attrs(s); | |
1083 | ||
1084 | /* Add options that are safe here */ | |
1085 | safe_mask |= 1 << REISERFS_SMALLTAIL; | |
1086 | safe_mask |= 1 << REISERFS_LARGETAIL; | |
1087 | safe_mask |= 1 << REISERFS_NO_BORDER; | |
1088 | safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; | |
1089 | safe_mask |= 1 << REISERFS_HASHED_RELOCATION; | |
1090 | safe_mask |= 1 << REISERFS_TEST4; | |
1091 | safe_mask |= 1 << REISERFS_ATTRS; | |
1092 | safe_mask |= 1 << REISERFS_XATTRS_USER; | |
1093 | safe_mask |= 1 << REISERFS_POSIXACL; | |
1094 | safe_mask |= 1 << REISERFS_BARRIER_FLUSH; | |
1095 | safe_mask |= 1 << REISERFS_BARRIER_NONE; | |
1096 | safe_mask |= 1 << REISERFS_ERROR_RO; | |
1097 | safe_mask |= 1 << REISERFS_ERROR_CONTINUE; | |
1098 | safe_mask |= 1 << REISERFS_ERROR_PANIC; | |
1099 | ||
1100 | /* Update the bitmask, taking care to keep | |
1101 | * the bits we're not allowed to change here */ | |
1102 | REISERFS_SB(s)->s_mount_opt = (REISERFS_SB(s)->s_mount_opt & ~safe_mask) | (mount_options & safe_mask); | |
1103 | ||
1104 | if(commit_max_age != 0 && commit_max_age != (unsigned int)-1) { | |
1105 | journal->j_max_commit_age = commit_max_age; | |
1106 | journal->j_max_trans_age = commit_max_age; | |
1107 | } | |
1108 | else if(commit_max_age == 0) | |
1109 | { | |
1110 | /* 0 means restore defaults. */ | |
1111 | journal->j_max_commit_age = journal->j_default_max_commit_age; | |
1112 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
1113 | } | |
1114 | ||
1115 | if(blocks) { | |
1116 | int rc = reiserfs_resize(s, blocks); | |
1117 | if (rc != 0) | |
1118 | return rc; | |
1119 | } | |
1120 | ||
1121 | if (*mount_flags & MS_RDONLY) { | |
1122 | reiserfs_xattr_init (s, *mount_flags); | |
1123 | /* remount read-only */ | |
1124 | if (s->s_flags & MS_RDONLY) | |
1125 | /* it is read-only already */ | |
1126 | return 0; | |
1127 | /* try to remount file system with read-only permissions */ | |
1128 | if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | err = journal_begin(&th, s, 10) ; | |
1133 | if (err) | |
1134 | return err; | |
1135 | ||
1136 | /* Mounting a rw partition read-only. */ | |
1137 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; | |
1138 | set_sb_umount_state( rs, REISERFS_SB(s)->s_mount_state ); | |
1139 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); | |
1140 | } else { | |
1141 | /* remount read-write */ | |
1142 | if (!(s->s_flags & MS_RDONLY)) { | |
1143 | reiserfs_xattr_init (s, *mount_flags); | |
1144 | return 0; /* We are read-write already */ | |
1145 | } | |
1146 | ||
1147 | if (reiserfs_is_journal_aborted (journal)) | |
1148 | return journal->j_errno; | |
1149 | ||
1150 | handle_data_mode(s, mount_options); | |
1151 | handle_barrier_mode(s, mount_options); | |
1152 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs) ; | |
1153 | s->s_flags &= ~MS_RDONLY ; /* now it is safe to call journal_begin */ | |
1154 | err = journal_begin(&th, s, 10) ; | |
1155 | if (err) | |
1156 | return err; | |
1157 | ||
1158 | /* Mount a partition which is read-only, read-write */ | |
1159 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; | |
1160 | REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); | |
1161 | s->s_flags &= ~MS_RDONLY; | |
1162 | set_sb_umount_state( rs, REISERFS_ERROR_FS ); | |
1163 | /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ | |
1164 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); | |
1165 | REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS ; | |
1166 | } | |
1167 | /* this will force a full flush of all journal lists */ | |
1168 | SB_JOURNAL(s)->j_must_wait = 1 ; | |
1169 | err = journal_end(&th, s, 10) ; | |
1170 | if (err) | |
1171 | return err; | |
1172 | s->s_dirt = 0; | |
1173 | ||
1174 | if (!( *mount_flags & MS_RDONLY ) ) { | |
1175 | finish_unfinished( s ); | |
1176 | reiserfs_xattr_init (s, *mount_flags); | |
1177 | } | |
1178 | ||
1179 | return 0; | |
1180 | } | |
1181 | ||
1182 | /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk. | |
1183 | * @sb - superblock for this filesystem | |
1184 | * @bi - the bitmap info to be loaded. Requires that bi->bh is valid. | |
1185 | * | |
1186 | * This routine counts how many free bits there are, finding the first zero | |
1187 | * as a side effect. Could also be implemented as a loop of test_bit() calls, or | |
1188 | * a loop of find_first_zero_bit() calls. This implementation is similar to | |
1189 | * find_first_zero_bit(), but doesn't return after it finds the first bit. | |
1190 | * Should only be called on fs mount, but should be fairly efficient anyways. | |
1191 | * | |
1192 | * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself | |
1193 | * will * invariably occupt block 0 represented in the bitmap. The only | |
1194 | * exception to this is when free_count also == 0, since there will be no | |
1195 | * free blocks at all. | |
1196 | */ | |
1197 | ||
1198 | static void load_bitmap_info_data (struct super_block *sb, | |
1199 | struct reiserfs_bitmap_info *bi) | |
1200 | { | |
1201 | unsigned long *cur = (unsigned long *)bi->bh->b_data; | |
1202 | ||
1203 | while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) { | |
1204 | ||
1205 | /* No need to scan if all 0's or all 1's. | |
1206 | * Since we're only counting 0's, we can simply ignore all 1's */ | |
1207 | if (*cur == 0) { | |
1208 | if (bi->first_zero_hint == 0) { | |
1209 | bi->first_zero_hint = ((char *)cur - bi->bh->b_data) << 3; | |
1210 | } | |
1211 | bi->free_count += sizeof(unsigned long)*8; | |
1212 | } else if (*cur != ~0L) { | |
1213 | int b; | |
1214 | for (b = 0; b < sizeof(unsigned long)*8; b++) { | |
1215 | if (!reiserfs_test_le_bit (b, cur)) { | |
1216 | bi->free_count ++; | |
1217 | if (bi->first_zero_hint == 0) | |
1218 | bi->first_zero_hint = | |
1219 | (((char *)cur - bi->bh->b_data) << 3) + b; | |
1220 | } | |
1221 | } | |
1222 | } | |
1223 | cur ++; | |
1224 | } | |
1225 | ||
1226 | #ifdef CONFIG_REISERFS_CHECK | |
1227 | // This outputs a lot of unneded info on big FSes | |
1228 | // reiserfs_warning ("bitmap loaded from block %d: %d free blocks", | |
1229 | // bi->bh->b_blocknr, bi->free_count); | |
1230 | #endif | |
1231 | } | |
1232 | ||
1233 | static int read_bitmaps (struct super_block * s) | |
1234 | { | |
1235 | int i, bmap_nr; | |
1236 | ||
1237 | SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s)); | |
1238 | if (SB_AP_BITMAP (s) == 0) | |
1239 | return 1; | |
1240 | memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s)); | |
1241 | for (i = 0, bmap_nr = REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1; | |
1242 | i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) { | |
1243 | SB_AP_BITMAP (s)[i].bh = sb_getblk(s, bmap_nr); | |
1244 | if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) | |
1245 | ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh); | |
1246 | } | |
1247 | for (i = 0; i < SB_BMAP_NR(s); i++) { | |
1248 | wait_on_buffer(SB_AP_BITMAP (s)[i].bh); | |
1249 | if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) { | |
1250 | reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: " | |
1251 | "bitmap block (#%lu) reading failed", | |
1252 | SB_AP_BITMAP(s)[i].bh->b_blocknr); | |
1253 | for (i = 0; i < SB_BMAP_NR(s); i++) | |
1254 | brelse(SB_AP_BITMAP(s)[i].bh); | |
1255 | vfree(SB_AP_BITMAP(s)); | |
1256 | SB_AP_BITMAP(s) = NULL; | |
1257 | return 1; | |
1258 | } | |
1259 | load_bitmap_info_data (s, SB_AP_BITMAP (s) + i); | |
1260 | } | |
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | static int read_old_bitmaps (struct super_block * s) | |
1265 | { | |
1266 | int i ; | |
1267 | struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK(s); | |
1268 | int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */ | |
1269 | ||
1270 | /* read true bitmap */ | |
1271 | SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs)); | |
1272 | if (SB_AP_BITMAP (s) == 0) | |
1273 | return 1; | |
1274 | ||
1275 | memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs)); | |
1276 | ||
1277 | for (i = 0; i < sb_bmap_nr(rs); i ++) { | |
1278 | SB_AP_BITMAP (s)[i].bh = sb_bread (s, bmp1 + i); | |
1279 | if (!SB_AP_BITMAP (s)[i].bh) | |
1280 | return 1; | |
1281 | load_bitmap_info_data (s, SB_AP_BITMAP (s) + i); | |
1282 | } | |
1283 | ||
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | static int read_super_block (struct super_block * s, int offset) | |
1288 | { | |
1289 | struct buffer_head * bh; | |
1290 | struct reiserfs_super_block * rs; | |
1291 | int fs_blocksize; | |
1292 | ||
1293 | ||
1294 | bh = sb_bread (s, offset / s->s_blocksize); | |
1295 | if (!bh) { | |
1296 | reiserfs_warning (s, "sh-2006: read_super_block: " | |
1297 | "bread failed (dev %s, block %lu, size %lu)", | |
1298 | reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize); | |
1299 | return 1; | |
1300 | } | |
1301 | ||
1302 | rs = (struct reiserfs_super_block *)bh->b_data; | |
1303 | if (!is_any_reiserfs_magic_string (rs)) { | |
1304 | brelse (bh); | |
1305 | return 1; | |
1306 | } | |
1307 | ||
1308 | // | |
1309 | // ok, reiserfs signature (old or new) found in at the given offset | |
1310 | // | |
1311 | fs_blocksize = sb_blocksize(rs); | |
1312 | brelse (bh); | |
1313 | sb_set_blocksize (s, fs_blocksize); | |
1314 | ||
1315 | bh = sb_bread (s, offset / s->s_blocksize); | |
1316 | if (!bh) { | |
1317 | reiserfs_warning (s, "sh-2007: read_super_block: " | |
1318 | "bread failed (dev %s, block %lu, size %lu)\n", | |
1319 | reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize); | |
1320 | return 1; | |
1321 | } | |
1322 | ||
1323 | rs = (struct reiserfs_super_block *)bh->b_data; | |
1324 | if (sb_blocksize(rs) != s->s_blocksize) { | |
1325 | reiserfs_warning (s, "sh-2011: read_super_block: " | |
1326 | "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n", | |
1327 | reiserfs_bdevname (s), (unsigned long long)bh->b_blocknr, s->s_blocksize); | |
1328 | brelse (bh); | |
1329 | return 1; | |
1330 | } | |
1331 | ||
1332 | if ( rs->s_v1.s_root_block == -1 ) { | |
1333 | brelse(bh) ; | |
1334 | reiserfs_warning (s, "Unfinished reiserfsck --rebuild-tree run detected. Please run\n" | |
1335 | "reiserfsck --rebuild-tree and wait for a completion. If that fails\n" | |
1336 | "get newer reiserfsprogs package"); | |
1337 | return 1; | |
1338 | } | |
1339 | ||
1340 | SB_BUFFER_WITH_SB (s) = bh; | |
1341 | SB_DISK_SUPER_BLOCK (s) = rs; | |
1342 | ||
1343 | if (is_reiserfs_jr (rs)) { | |
1344 | /* magic is of non-standard journal filesystem, look at s_version to | |
1345 | find which format is in use */ | |
1346 | if (sb_version(rs) == REISERFS_VERSION_2) | |
1347 | reiserfs_warning (s, "read_super_block: found reiserfs format \"3.6\"" | |
1348 | " with non-standard journal"); | |
1349 | else if (sb_version(rs) == REISERFS_VERSION_1) | |
1350 | reiserfs_warning (s, "read_super_block: found reiserfs format \"3.5\"" | |
1351 | " with non-standard journal"); | |
1352 | else { | |
1353 | reiserfs_warning (s, "sh-2012: read_super_block: found unknown " | |
1354 | "format \"%u\" of reiserfs with non-standard magic", | |
1355 | sb_version(rs)); | |
1356 | return 1; | |
1357 | } | |
1358 | } | |
1359 | else | |
1360 | /* s_version of standard format may contain incorrect information, | |
1361 | so we just look at the magic string */ | |
1362 | reiserfs_info (s, "found reiserfs format \"%s\" with standard journal\n", | |
1363 | is_reiserfs_3_5 (rs) ? "3.5" : "3.6"); | |
1364 | ||
1365 | s->s_op = &reiserfs_sops; | |
1366 | s->s_export_op = &reiserfs_export_ops; | |
1367 | #ifdef CONFIG_QUOTA | |
1368 | s->s_qcop = &reiserfs_qctl_operations; | |
1369 | s->dq_op = &reiserfs_quota_operations; | |
1370 | #endif | |
1371 | ||
1372 | /* new format is limited by the 32 bit wide i_blocks field, want to | |
1373 | ** be one full block below that. | |
1374 | */ | |
1375 | s->s_maxbytes = (512LL << 32) - s->s_blocksize ; | |
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | ||
1380 | ||
1381 | /* after journal replay, reread all bitmap and super blocks */ | |
1382 | static int reread_meta_blocks(struct super_block *s) { | |
1383 | int i ; | |
1384 | ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))) ; | |
1385 | wait_on_buffer(SB_BUFFER_WITH_SB(s)) ; | |
1386 | if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) { | |
1387 | reiserfs_warning (s, "reread_meta_blocks, error reading the super") ; | |
1388 | return 1 ; | |
1389 | } | |
1390 | ||
1391 | for (i = 0; i < SB_BMAP_NR(s) ; i++) { | |
1392 | ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh)) ; | |
1393 | wait_on_buffer(SB_AP_BITMAP(s)[i].bh) ; | |
1394 | if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) { | |
1395 | reiserfs_warning (s, "reread_meta_blocks, error reading bitmap block number %d at %llu", | |
1396 | i, (unsigned long long)SB_AP_BITMAP(s)[i].bh->b_blocknr) ; | |
1397 | return 1 ; | |
1398 | } | |
1399 | } | |
1400 | return 0 ; | |
1401 | ||
1402 | } | |
1403 | ||
1404 | ||
1405 | ///////////////////////////////////////////////////// | |
1406 | // hash detection stuff | |
1407 | ||
1408 | ||
1409 | // if root directory is empty - we set default - Yura's - hash and | |
1410 | // warn about it | |
1411 | // FIXME: we look for only one name in a directory. If tea and yura | |
1412 | // bith have the same value - we ask user to send report to the | |
1413 | // mailing list | |
1414 | static __u32 find_hash_out (struct super_block * s) | |
1415 | { | |
1416 | int retval; | |
1417 | struct inode * inode; | |
1418 | struct cpu_key key; | |
1419 | INITIALIZE_PATH (path); | |
1420 | struct reiserfs_dir_entry de; | |
1421 | __u32 hash = DEFAULT_HASH; | |
1422 | ||
1423 | inode = s->s_root->d_inode; | |
1424 | ||
1425 | do { // Some serious "goto"-hater was there ;) | |
1426 | u32 teahash, r5hash, yurahash; | |
1427 | ||
1428 | make_cpu_key (&key, inode, ~0, TYPE_DIRENTRY, 3); | |
1429 | retval = search_by_entry_key (s, &key, &path, &de); | |
1430 | if (retval == IO_ERROR) { | |
1431 | pathrelse (&path); | |
1432 | return UNSET_HASH ; | |
1433 | } | |
1434 | if (retval == NAME_NOT_FOUND) | |
1435 | de.de_entry_num --; | |
1436 | set_de_name_and_namelen (&de); | |
1437 | if (deh_offset( &(de.de_deh[de.de_entry_num]) ) == DOT_DOT_OFFSET) { | |
1438 | /* allow override in this case */ | |
1439 | if (reiserfs_rupasov_hash(s)) { | |
1440 | hash = YURA_HASH ; | |
1441 | } | |
1442 | reiserfs_warning(s,"FS seems to be empty, autodetect " | |
1443 | "is using the default hash"); | |
1444 | break; | |
1445 | } | |
1446 | r5hash=GET_HASH_VALUE (r5_hash (de.de_name, de.de_namelen)); | |
1447 | teahash=GET_HASH_VALUE (keyed_hash (de.de_name, de.de_namelen)); | |
1448 | yurahash=GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen)); | |
1449 | if ( ( (teahash == r5hash) && (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) ) || | |
1450 | ( (teahash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) || | |
1451 | ( (r5hash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ) { | |
1452 | reiserfs_warning(s,"Unable to automatically detect hash function. " | |
1453 | "Please mount with -o hash={tea,rupasov,r5}", | |
1454 | reiserfs_bdevname (s)); | |
1455 | hash = UNSET_HASH; | |
1456 | break; | |
1457 | } | |
1458 | if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == yurahash) | |
1459 | hash = YURA_HASH; | |
1460 | else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == teahash) | |
1461 | hash = TEA_HASH; | |
1462 | else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == r5hash) | |
1463 | hash = R5_HASH; | |
1464 | else { | |
1465 | reiserfs_warning (s,"Unrecognised hash function"); | |
1466 | hash = UNSET_HASH; | |
1467 | } | |
1468 | } while (0); | |
1469 | ||
1470 | pathrelse (&path); | |
1471 | return hash; | |
1472 | } | |
1473 | ||
1474 | // finds out which hash names are sorted with | |
1475 | static int what_hash (struct super_block * s) | |
1476 | { | |
1477 | __u32 code; | |
1478 | ||
1479 | code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); | |
1480 | ||
1481 | /* reiserfs_hash_detect() == true if any of the hash mount options | |
1482 | ** were used. We must check them to make sure the user isn't | |
1483 | ** using a bad hash value | |
1484 | */ | |
1485 | if (code == UNSET_HASH || reiserfs_hash_detect(s)) | |
1486 | code = find_hash_out (s); | |
1487 | ||
1488 | if (code != UNSET_HASH && reiserfs_hash_detect(s)) { | |
1489 | /* detection has found the hash, and we must check against the | |
1490 | ** mount options | |
1491 | */ | |
1492 | if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { | |
1493 | reiserfs_warning (s, "Error, %s hash detected, " | |
1494 | "unable to force rupasov hash", reiserfs_hashname(code)) ; | |
1495 | code = UNSET_HASH ; | |
1496 | } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { | |
1497 | reiserfs_warning (s, "Error, %s hash detected, " | |
1498 | "unable to force tea hash", reiserfs_hashname(code)) ; | |
1499 | code = UNSET_HASH ; | |
1500 | } else if (reiserfs_r5_hash(s) && code != R5_HASH) { | |
1501 | reiserfs_warning (s, "Error, %s hash detected, " | |
1502 | "unable to force r5 hash", reiserfs_hashname(code)) ; | |
1503 | code = UNSET_HASH ; | |
1504 | } | |
1505 | } else { | |
1506 | /* find_hash_out was not called or could not determine the hash */ | |
1507 | if (reiserfs_rupasov_hash(s)) { | |
1508 | code = YURA_HASH ; | |
1509 | } else if (reiserfs_tea_hash(s)) { | |
1510 | code = TEA_HASH ; | |
1511 | } else if (reiserfs_r5_hash(s)) { | |
1512 | code = R5_HASH ; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | /* if we are mounted RW, and we have a new valid hash code, update | |
1517 | ** the super | |
1518 | */ | |
1519 | if (code != UNSET_HASH && | |
1520 | !(s->s_flags & MS_RDONLY) && | |
1521 | code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { | |
1522 | set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); | |
1523 | } | |
1524 | return code; | |
1525 | } | |
1526 | ||
1527 | // return pointer to appropriate function | |
1528 | static hashf_t hash_function (struct super_block * s) | |
1529 | { | |
1530 | switch (what_hash (s)) { | |
1531 | case TEA_HASH: | |
1532 | reiserfs_info (s, "Using tea hash to sort names\n"); | |
1533 | return keyed_hash; | |
1534 | case YURA_HASH: | |
1535 | reiserfs_info (s, "Using rupasov hash to sort names\n"); | |
1536 | return yura_hash; | |
1537 | case R5_HASH: | |
1538 | reiserfs_info (s, "Using r5 hash to sort names\n"); | |
1539 | return r5_hash; | |
1540 | } | |
1541 | return NULL; | |
1542 | } | |
1543 | ||
1544 | // this is used to set up correct value for old partitions | |
1545 | static int function2code (hashf_t func) | |
1546 | { | |
1547 | if (func == keyed_hash) | |
1548 | return TEA_HASH; | |
1549 | if (func == yura_hash) | |
1550 | return YURA_HASH; | |
1551 | if (func == r5_hash) | |
1552 | return R5_HASH; | |
1553 | ||
1554 | BUG() ; // should never happen | |
1555 | ||
1556 | return 0; | |
1557 | } | |
1558 | ||
1559 | #define SWARN(silent, s, ...) \ | |
1560 | if (!(silent)) \ | |
1561 | reiserfs_warning (s, __VA_ARGS__) | |
1562 | ||
1563 | static int reiserfs_fill_super (struct super_block * s, void * data, int silent) | |
1564 | { | |
1565 | struct inode *root_inode; | |
1566 | int j; | |
1567 | struct reiserfs_transaction_handle th ; | |
1568 | int old_format = 0; | |
1569 | unsigned long blocks; | |
1570 | unsigned int commit_max_age = 0; | |
1571 | int jinit_done = 0 ; | |
1572 | struct reiserfs_iget_args args ; | |
1573 | struct reiserfs_super_block * rs; | |
1574 | char *jdev_name; | |
1575 | struct reiserfs_sb_info *sbi; | |
1576 | int errval = -EINVAL; | |
1577 | ||
1578 | sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); | |
1579 | if (!sbi) { | |
1580 | errval = -ENOMEM; | |
1581 | goto error; | |
1582 | } | |
1583 | s->s_fs_info = sbi; | |
1584 | memset (sbi, 0, sizeof (struct reiserfs_sb_info)); | |
1585 | /* Set default values for options: non-aggressive tails, RO on errors */ | |
1586 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); | |
1587 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); | |
1588 | /* no preallocation minimum, be smart in | |
1589 | reiserfs_file_write instead */ | |
1590 | REISERFS_SB(s)->s_alloc_options.preallocmin = 0; | |
1591 | /* Preallocate by 16 blocks (17-1) at once */ | |
1592 | REISERFS_SB(s)->s_alloc_options.preallocsize = 17; | |
1593 | /* Initialize the rwsem for xattr dir */ | |
1594 | init_rwsem(&REISERFS_SB(s)->xattr_dir_sem); | |
1595 | ||
1596 | /* setup default block allocator options */ | |
1597 | reiserfs_init_alloc_options(s); | |
1598 | ||
1599 | jdev_name = NULL; | |
1600 | if (reiserfs_parse_options (s, (char *) data, &(sbi->s_mount_opt), &blocks, &jdev_name, &commit_max_age) == 0) { | |
1601 | goto error; | |
1602 | } | |
1603 | ||
1604 | if (blocks) { | |
1605 | SWARN (silent, s, "jmacd-7: reiserfs_fill_super: resize option " | |
1606 | "for remount only"); | |
1607 | goto error; | |
1608 | } | |
1609 | ||
1610 | /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */ | |
1611 | if (!read_super_block (s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) | |
1612 | old_format = 1; | |
1613 | /* try new format (64-th 1k block), which can contain reiserfs super block */ | |
1614 | else if (read_super_block (s, REISERFS_DISK_OFFSET_IN_BYTES)) { | |
1615 | SWARN(silent, s, "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", reiserfs_bdevname (s)); | |
1616 | goto error; | |
1617 | } | |
1618 | ||
1619 | rs = SB_DISK_SUPER_BLOCK (s); | |
1620 | /* Let's do basic sanity check to verify that underlying device is not | |
1621 | smaller than the filesystem. If the check fails then abort and scream, | |
1622 | because bad stuff will happen otherwise. */ | |
1623 | if ( s->s_bdev && s->s_bdev->bd_inode && i_size_read(s->s_bdev->bd_inode) < sb_block_count(rs)*sb_blocksize(rs)) { | |
1624 | SWARN (silent, s, "Filesystem on %s cannot be mounted because it is bigger than the device", reiserfs_bdevname(s)); | |
1625 | SWARN(silent, s, "You may need to run fsck or increase size of your LVM partition"); | |
1626 | SWARN(silent, s, "Or may be you forgot to reboot after fdisk when it told you to"); | |
1627 | goto error; | |
1628 | } | |
1629 | ||
1630 | sbi->s_mount_state = SB_REISERFS_STATE(s); | |
1631 | sbi->s_mount_state = REISERFS_VALID_FS ; | |
1632 | ||
1633 | if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) { | |
1634 | SWARN(silent, s, "jmacd-8: reiserfs_fill_super: unable to read bitmap"); | |
1635 | goto error; | |
1636 | } | |
1637 | #ifdef CONFIG_REISERFS_CHECK | |
1638 | SWARN (silent, s, "CONFIG_REISERFS_CHECK is set ON"); | |
1639 | SWARN (silent, s, "- it is slow mode for debugging."); | |
1640 | #endif | |
1641 | ||
1642 | /* make data=ordered the default */ | |
1643 | if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && | |
1644 | !reiserfs_data_writeback(s)) | |
1645 | { | |
1646 | REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); | |
1647 | } | |
1648 | ||
1649 | if (reiserfs_data_log(s)) { | |
1650 | reiserfs_info (s, "using journaled data mode\n"); | |
1651 | } else if (reiserfs_data_ordered(s)) { | |
1652 | reiserfs_info (s, "using ordered data mode\n"); | |
1653 | } else { | |
1654 | reiserfs_info (s, "using writeback data mode\n"); | |
1655 | } | |
1656 | if (reiserfs_barrier_flush(s)) { | |
1657 | printk("reiserfs: using flush barriers\n"); | |
1658 | } | |
1659 | ||
1660 | // set_device_ro(s->s_dev, 1) ; | |
1661 | if( journal_init(s, jdev_name, old_format, commit_max_age) ) { | |
1662 | SWARN(silent, s, "sh-2022: reiserfs_fill_super: unable to initialize journal space") ; | |
1663 | goto error ; | |
1664 | } else { | |
1665 | jinit_done = 1 ; /* once this is set, journal_release must be called | |
1666 | ** if we error out of the mount | |
1667 | */ | |
1668 | } | |
1669 | if (reread_meta_blocks(s)) { | |
1670 | SWARN(silent, s, "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init") ; | |
1671 | goto error ; | |
1672 | } | |
1673 | ||
1674 | if (replay_only (s)) | |
1675 | goto error; | |
1676 | ||
1677 | if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) { | |
1678 | SWARN(silent, s, "clm-7000: Detected readonly device, marking FS readonly") ; | |
1679 | s->s_flags |= MS_RDONLY ; | |
1680 | } | |
1681 | args.objectid = REISERFS_ROOT_OBJECTID ; | |
1682 | args.dirid = REISERFS_ROOT_PARENT_OBJECTID ; | |
1683 | root_inode = iget5_locked (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args)); | |
1684 | if (!root_inode) { | |
1685 | SWARN(silent, s, "jmacd-10: reiserfs_fill_super: get root inode failed"); | |
1686 | goto error; | |
1687 | } | |
1688 | ||
1689 | if (root_inode->i_state & I_NEW) { | |
1690 | reiserfs_read_locked_inode(root_inode, &args); | |
1691 | unlock_new_inode(root_inode); | |
1692 | } | |
1693 | ||
1694 | s->s_root = d_alloc_root(root_inode); | |
1695 | if (!s->s_root) { | |
1696 | iput(root_inode); | |
1697 | goto error; | |
1698 | } | |
1699 | ||
1700 | // define and initialize hash function | |
1701 | sbi->s_hash_function = hash_function (s); | |
1702 | if (sbi->s_hash_function == NULL) { | |
1703 | dput(s->s_root) ; | |
1704 | s->s_root = NULL ; | |
1705 | goto error ; | |
1706 | } | |
1707 | ||
1708 | if (is_reiserfs_3_5 (rs) || (is_reiserfs_jr (rs) && SB_VERSION (s) == REISERFS_VERSION_1)) | |
1709 | set_bit(REISERFS_3_5, &(sbi->s_properties)); | |
1710 | else | |
1711 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1712 | ||
1713 | if (!(s->s_flags & MS_RDONLY)) { | |
1714 | ||
1715 | errval = journal_begin(&th, s, 1) ; | |
1716 | if (errval) { | |
1717 | dput (s->s_root); | |
1718 | s->s_root = NULL; | |
1719 | goto error; | |
1720 | } | |
1721 | reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ; | |
1722 | ||
1723 | set_sb_umount_state( rs, REISERFS_ERROR_FS ); | |
1724 | set_sb_fs_state (rs, 0); | |
1725 | ||
1726 | if (old_format_only(s)) { | |
1727 | /* filesystem of format 3.5 either with standard or non-standard | |
1728 | journal */ | |
1729 | if (convert_reiserfs (s)) { | |
1730 | /* and -o conv is given */ | |
1731 | if(!silent) | |
1732 | reiserfs_info (s,"converting 3.5 filesystem to the 3.6 format") ; | |
1733 | ||
1734 | if (is_reiserfs_3_5 (rs)) | |
1735 | /* put magic string of 3.6 format. 2.2 will not be able to | |
1736 | mount this filesystem anymore */ | |
1737 | memcpy (rs->s_v1.s_magic, reiserfs_3_6_magic_string, | |
1738 | sizeof (reiserfs_3_6_magic_string)); | |
1739 | ||
1740 | set_sb_version(rs,REISERFS_VERSION_2); | |
1741 | reiserfs_convert_objectid_map_v1(s) ; | |
1742 | set_bit(REISERFS_3_6, &(sbi->s_properties)); | |
1743 | clear_bit(REISERFS_3_5, &(sbi->s_properties)); | |
1744 | } else if (!silent){ | |
1745 | reiserfs_info (s, "using 3.5.x disk format\n") ; | |
1746 | } | |
1747 | } | |
1748 | ||
1749 | journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s)); | |
1750 | errval = journal_end(&th, s, 1) ; | |
1751 | if (errval) { | |
1752 | dput (s->s_root); | |
1753 | s->s_root = NULL; | |
1754 | goto error; | |
1755 | } | |
1756 | ||
1757 | if ((errval = reiserfs_xattr_init (s, s->s_flags))) { | |
1758 | dput (s->s_root); | |
1759 | s->s_root = NULL; | |
1760 | goto error; | |
1761 | } | |
1762 | ||
1763 | /* look for files which were to be removed in previous session */ | |
1764 | finish_unfinished (s); | |
1765 | } else { | |
1766 | if ( old_format_only(s) && !silent) { | |
1767 | reiserfs_info (s, "using 3.5.x disk format\n") ; | |
1768 | } | |
1769 | ||
1770 | if ((errval = reiserfs_xattr_init (s, s->s_flags))) { | |
1771 | dput (s->s_root); | |
1772 | s->s_root = NULL; | |
1773 | goto error; | |
1774 | } | |
1775 | } | |
1776 | // mark hash in super block: it could be unset. overwrite should be ok | |
1777 | set_sb_hash_function_code( rs, function2code(sbi->s_hash_function ) ); | |
1778 | ||
1779 | handle_attrs( s ); | |
1780 | ||
1781 | reiserfs_proc_info_init( s ); | |
1782 | ||
1783 | init_waitqueue_head (&(sbi->s_wait)); | |
1784 | spin_lock_init(&sbi->bitmap_lock); | |
1785 | ||
1786 | return (0); | |
1787 | ||
1788 | error: | |
1789 | if (jinit_done) { /* kill the commit thread, free journal ram */ | |
1790 | journal_release_error(NULL, s) ; | |
1791 | } | |
1792 | if (SB_DISK_SUPER_BLOCK (s)) { | |
1793 | for (j = 0; j < SB_BMAP_NR (s); j ++) { | |
1794 | if (SB_AP_BITMAP (s)) | |
1795 | brelse (SB_AP_BITMAP (s)[j].bh); | |
1796 | } | |
1797 | if (SB_AP_BITMAP (s)) | |
1798 | vfree (SB_AP_BITMAP (s)); | |
1799 | } | |
1800 | if (SB_BUFFER_WITH_SB (s)) | |
1801 | brelse(SB_BUFFER_WITH_SB (s)); | |
1802 | #ifdef CONFIG_QUOTA | |
1803 | for (j = 0; j < MAXQUOTAS; j++) { | |
1804 | if (sbi->s_qf_names[j]) | |
1805 | kfree(sbi->s_qf_names[j]); | |
1806 | } | |
1807 | #endif | |
1808 | if (sbi != NULL) { | |
1809 | kfree(sbi); | |
1810 | } | |
1811 | ||
1812 | s->s_fs_info = NULL; | |
1813 | return errval; | |
1814 | } | |
1815 | ||
1816 | ||
1817 | static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf) | |
1818 | { | |
1819 | struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s); | |
1820 | ||
1821 | buf->f_namelen = (REISERFS_MAX_NAME (s->s_blocksize)); | |
1822 | buf->f_bfree = sb_free_blocks(rs); | |
1823 | buf->f_bavail = buf->f_bfree; | |
1824 | buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; | |
1825 | buf->f_bsize = s->s_blocksize; | |
1826 | /* changed to accommodate gcc folks.*/ | |
1827 | buf->f_type = REISERFS_SUPER_MAGIC; | |
1828 | return 0; | |
1829 | } | |
1830 | ||
1831 | #ifdef CONFIG_QUOTA | |
1832 | static int reiserfs_dquot_initialize(struct inode *inode, int type) | |
1833 | { | |
1834 | struct reiserfs_transaction_handle th; | |
1835 | int ret; | |
1836 | ||
1837 | /* We may create quota structure so we need to reserve enough blocks */ | |
1838 | reiserfs_write_lock(inode->i_sb); | |
1839 | journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); | |
1840 | ret = dquot_initialize(inode, type); | |
1841 | journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); | |
1842 | reiserfs_write_unlock(inode->i_sb); | |
1843 | return ret; | |
1844 | } | |
1845 | ||
1846 | static int reiserfs_dquot_drop(struct inode *inode) | |
1847 | { | |
1848 | struct reiserfs_transaction_handle th; | |
1849 | int ret; | |
1850 | ||
1851 | /* We may delete quota structure so we need to reserve enough blocks */ | |
1852 | reiserfs_write_lock(inode->i_sb); | |
1853 | journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); | |
1854 | ret = dquot_drop(inode); | |
1855 | journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS); | |
1856 | reiserfs_write_unlock(inode->i_sb); | |
1857 | return ret; | |
1858 | } | |
1859 | ||
1860 | static int reiserfs_write_dquot(struct dquot *dquot) | |
1861 | { | |
1862 | struct reiserfs_transaction_handle th; | |
1863 | int ret; | |
1864 | ||
1865 | reiserfs_write_lock(dquot->dq_sb); | |
1866 | journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS); | |
1867 | ret = dquot_commit(dquot); | |
1868 | journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS); | |
1869 | reiserfs_write_unlock(dquot->dq_sb); | |
1870 | return ret; | |
1871 | } | |
1872 | ||
1873 | static int reiserfs_acquire_dquot(struct dquot *dquot) | |
1874 | { | |
1875 | struct reiserfs_transaction_handle th; | |
1876 | int ret; | |
1877 | ||
1878 | reiserfs_write_lock(dquot->dq_sb); | |
1879 | journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); | |
1880 | ret = dquot_acquire(dquot); | |
1881 | journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); | |
1882 | reiserfs_write_unlock(dquot->dq_sb); | |
1883 | return ret; | |
1884 | } | |
1885 | ||
1886 | static int reiserfs_release_dquot(struct dquot *dquot) | |
1887 | { | |
1888 | struct reiserfs_transaction_handle th; | |
1889 | int ret; | |
1890 | ||
1891 | reiserfs_write_lock(dquot->dq_sb); | |
1892 | journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); | |
1893 | ret = dquot_release(dquot); | |
1894 | journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS); | |
1895 | reiserfs_write_unlock(dquot->dq_sb); | |
1896 | return ret; | |
1897 | } | |
1898 | ||
1899 | static int reiserfs_mark_dquot_dirty(struct dquot *dquot) | |
1900 | { | |
1901 | /* Are we journalling quotas? */ | |
1902 | if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || | |
1903 | REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
1904 | dquot_mark_dquot_dirty(dquot); | |
1905 | return reiserfs_write_dquot(dquot); | |
1906 | } | |
1907 | else | |
1908 | return dquot_mark_dquot_dirty(dquot); | |
1909 | } | |
1910 | ||
1911 | static int reiserfs_write_info(struct super_block *sb, int type) | |
1912 | { | |
1913 | struct reiserfs_transaction_handle th; | |
1914 | int ret; | |
1915 | ||
1916 | /* Data block + inode block */ | |
1917 | reiserfs_write_lock(sb); | |
1918 | journal_begin(&th, sb, 2); | |
1919 | ret = dquot_commit_info(sb, type); | |
1920 | journal_end(&th, sb, 2); | |
1921 | reiserfs_write_unlock(sb); | |
1922 | return ret; | |
1923 | } | |
1924 | ||
1925 | /* | |
1926 | * Turn on quotas during mount time - we need to find | |
1927 | * the quota file and such... | |
1928 | */ | |
1929 | static int reiserfs_quota_on_mount(struct super_block *sb, int type) | |
1930 | { | |
1931 | int err; | |
1932 | struct dentry *dentry; | |
1933 | struct qstr name = { .name = REISERFS_SB(sb)->s_qf_names[type], | |
1934 | .hash = 0, | |
1935 | .len = strlen(REISERFS_SB(sb)->s_qf_names[type])}; | |
1936 | ||
1937 | dentry = lookup_hash(&name, sb->s_root); | |
1938 | if (IS_ERR(dentry)) | |
1939 | return PTR_ERR(dentry); | |
1940 | err = vfs_quota_on_mount(type, REISERFS_SB(sb)->s_jquota_fmt, dentry); | |
1941 | /* Now invalidate and put the dentry - quota got its own reference | |
1942 | * to inode and dentry has at least wrong hash so we had better | |
1943 | * throw it away */ | |
1944 | d_invalidate(dentry); | |
1945 | dput(dentry); | |
1946 | return err; | |
1947 | } | |
1948 | ||
1949 | /* | |
1950 | * Standard function to be called on quota_on | |
1951 | */ | |
1952 | static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path) | |
1953 | { | |
1954 | int err; | |
1955 | struct nameidata nd; | |
1956 | ||
1957 | err = path_lookup(path, LOOKUP_FOLLOW, &nd); | |
1958 | if (err) | |
1959 | return err; | |
1960 | /* Quotafile not on the same filesystem? */ | |
1961 | if (nd.mnt->mnt_sb != sb) { | |
1962 | path_release(&nd); | |
1963 | return -EXDEV; | |
1964 | } | |
1965 | /* We must not pack tails for quota files on reiserfs for quota IO to work */ | |
1966 | if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) { | |
1967 | reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled."); | |
1968 | path_release(&nd); | |
1969 | return -EINVAL; | |
1970 | } | |
1971 | /* Not journalling quota? No more tests needed... */ | |
1972 | if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] && | |
1973 | !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) { | |
1974 | path_release(&nd); | |
1975 | return vfs_quota_on(sb, type, format_id, path); | |
1976 | } | |
1977 | /* Quotafile not of fs root? */ | |
1978 | if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) | |
1979 | reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. " | |
1980 | "Journalled quota will not work."); | |
1981 | path_release(&nd); | |
1982 | return vfs_quota_on(sb, type, format_id, path); | |
1983 | } | |
1984 | ||
1985 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
1986 | * acquiring the locks... As quota files are never truncated and quota code | |
1987 | * itself serializes the operations (and noone else should touch the files) | |
1988 | * we don't have to be afraid of races */ | |
1989 | static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, | |
1990 | size_t len, loff_t off) | |
1991 | { | |
1992 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
1993 | unsigned long blk = off >> sb->s_blocksize_bits; | |
1994 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
1995 | size_t toread; | |
1996 | struct buffer_head tmp_bh, *bh; | |
1997 | loff_t i_size = i_size_read(inode); | |
1998 | ||
1999 | if (off > i_size) | |
2000 | return 0; | |
2001 | if (off+len > i_size) | |
2002 | len = i_size-off; | |
2003 | toread = len; | |
2004 | while (toread > 0) { | |
2005 | tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread; | |
2006 | tmp_bh.b_state = 0; | |
2007 | /* Quota files are without tails so we can safely use this function */ | |
2008 | reiserfs_write_lock(sb); | |
2009 | err = reiserfs_get_block(inode, blk, &tmp_bh, 0); | |
2010 | reiserfs_write_unlock(sb); | |
2011 | if (err) | |
2012 | return err; | |
2013 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
2014 | memset(data, 0, tocopy); | |
2015 | else { | |
2016 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2017 | if (!bh) | |
2018 | return -EIO; | |
2019 | memcpy(data, bh->b_data+offset, tocopy); | |
2020 | brelse(bh); | |
2021 | } | |
2022 | offset = 0; | |
2023 | toread -= tocopy; | |
2024 | data += tocopy; | |
2025 | blk++; | |
2026 | } | |
2027 | return len; | |
2028 | } | |
2029 | ||
2030 | /* Write to quotafile (we know the transaction is already started and has | |
2031 | * enough credits) */ | |
2032 | static ssize_t reiserfs_quota_write(struct super_block *sb, int type, | |
2033 | const char *data, size_t len, loff_t off) | |
2034 | { | |
2035 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
2036 | unsigned long blk = off >> sb->s_blocksize_bits; | |
2037 | int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; | |
2038 | int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; | |
2039 | size_t towrite = len; | |
2040 | struct buffer_head tmp_bh, *bh; | |
2041 | ||
2042 | down(&inode->i_sem); | |
2043 | while (towrite > 0) { | |
2044 | tocopy = sb->s_blocksize - offset < towrite ? | |
2045 | sb->s_blocksize - offset : towrite; | |
2046 | tmp_bh.b_state = 0; | |
2047 | err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); | |
2048 | if (err) | |
2049 | goto out; | |
2050 | if (offset || tocopy != sb->s_blocksize) | |
2051 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
2052 | else | |
2053 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
2054 | if (!bh) { | |
2055 | err = -EIO; | |
2056 | goto out; | |
2057 | } | |
2058 | lock_buffer(bh); | |
2059 | memcpy(bh->b_data+offset, data, tocopy); | |
2060 | flush_dcache_page(bh->b_page); | |
2061 | set_buffer_uptodate(bh); | |
2062 | unlock_buffer(bh); | |
2063 | reiserfs_prepare_for_journal(sb, bh, 1); | |
2064 | journal_mark_dirty(current->journal_info, sb, bh); | |
2065 | if (!journal_quota) | |
2066 | reiserfs_add_ordered_list(inode, bh); | |
2067 | brelse(bh); | |
2068 | offset = 0; | |
2069 | towrite -= tocopy; | |
2070 | data += tocopy; | |
2071 | blk++; | |
2072 | } | |
2073 | out: | |
2074 | if (len == towrite) | |
2075 | return err; | |
2076 | if (inode->i_size < off+len-towrite) | |
2077 | i_size_write(inode, off+len-towrite); | |
2078 | inode->i_version++; | |
2079 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
2080 | mark_inode_dirty(inode); | |
2081 | up(&inode->i_sem); | |
2082 | return len - towrite; | |
2083 | } | |
2084 | ||
2085 | #endif | |
2086 | ||
2087 | static struct super_block* | |
2088 | get_super_block (struct file_system_type *fs_type, int flags, | |
2089 | const char *dev_name, void *data) | |
2090 | { | |
2091 | return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); | |
2092 | } | |
2093 | ||
2094 | static int __init | |
2095 | init_reiserfs_fs ( void ) | |
2096 | { | |
2097 | int ret; | |
2098 | ||
2099 | if ((ret = init_inodecache ())) { | |
2100 | return ret; | |
2101 | } | |
2102 | ||
2103 | if ((ret = reiserfs_xattr_register_handlers ())) | |
2104 | goto failed_reiserfs_xattr_register_handlers; | |
2105 | ||
2106 | reiserfs_proc_info_global_init (); | |
2107 | reiserfs_proc_register_global ("version", reiserfs_global_version_in_proc); | |
2108 | ||
2109 | ret = register_filesystem (& reiserfs_fs_type); | |
2110 | ||
2111 | if (ret == 0) { | |
2112 | return 0; | |
2113 | } | |
2114 | ||
2115 | reiserfs_xattr_unregister_handlers (); | |
2116 | ||
2117 | failed_reiserfs_xattr_register_handlers: | |
2118 | reiserfs_proc_unregister_global ("version"); | |
2119 | reiserfs_proc_info_global_done (); | |
2120 | destroy_inodecache (); | |
2121 | ||
2122 | return ret; | |
2123 | } | |
2124 | ||
2125 | static void __exit | |
2126 | exit_reiserfs_fs ( void ) | |
2127 | { | |
2128 | reiserfs_xattr_unregister_handlers (); | |
2129 | reiserfs_proc_unregister_global ("version"); | |
2130 | reiserfs_proc_info_global_done (); | |
2131 | unregister_filesystem (& reiserfs_fs_type); | |
2132 | destroy_inodecache (); | |
2133 | } | |
2134 | ||
2135 | struct file_system_type reiserfs_fs_type = { | |
2136 | .owner = THIS_MODULE, | |
2137 | .name = "reiserfs", | |
2138 | .get_sb = get_super_block, | |
2139 | .kill_sb = kill_block_super, | |
2140 | .fs_flags = FS_REQUIRES_DEV, | |
2141 | }; | |
2142 | ||
2143 | MODULE_DESCRIPTION ("ReiserFS journaled filesystem"); | |
2144 | MODULE_AUTHOR ("Hans Reiser <reiser@namesys.com>"); | |
2145 | MODULE_LICENSE ("GPL"); | |
2146 | ||
2147 | module_init (init_reiserfs_fs); | |
2148 | module_exit (exit_reiserfs_fs); |