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Merge ../linux-2.6
[deliverable/linux.git] / fs / reiserfs / super.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
10 *
11 * NO WARRANTY
12 */
13
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/vmalloc.h>
16#include <linux/time.h>
17#include <asm/uaccess.h>
18#include <linux/reiserfs_fs.h>
19#include <linux/reiserfs_acl.h>
20#include <linux/reiserfs_xattr.h>
1da177e4
LT		 21#include <linux/init.h>
22#include <linux/blkdev.h>
23#include <linux/buffer_head.h>
a5694255 24#include <linux/exportfs.h>
74abb989 25#include <linux/quotaops.h>
1da177e4 26#include <linux/vfs.h>
6b3286ed 27#include <linux/mnt_namespace.h>
1da177e4
LT		 28#include <linux/mount.h>
29#include <linux/namei.h>
30#include <linux/quotaops.h>
31
32struct file_system_type reiserfs_fs_type;
33
34static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
35static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
36static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
37
bd4c625c 38int is_reiserfs_3_5(struct reiserfs_super_block *rs)
1da177e4 39{
bd4c625c
LT		 40 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
41 strlen(reiserfs_3_5_magic_string));
1da177e4
LT		 42}
43
bd4c625c 44int is_reiserfs_3_6(struct reiserfs_super_block *rs)
1da177e4 45{
bd4c625c
LT		 46 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
47 strlen(reiserfs_3_6_magic_string));
1da177e4
LT		 48}
49
bd4c625c 50int is_reiserfs_jr(struct reiserfs_super_block *rs)
1da177e4 51{
bd4c625c
LT		 52 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
53 strlen(reiserfs_jr_magic_string));
1da177e4
LT		 54}
55
bd4c625c 56static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
1da177e4 57{
bd4c625c
LT		 58 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
59 is_reiserfs_jr(rs));
1da177e4
LT		 60}
61
bd4c625c 62static int reiserfs_remount(struct super_block *s, int *flags, char *data);
726c3342 63static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
1da177e4 64
bd4c625c 65static int reiserfs_sync_fs(struct super_block *s, int wait)
1da177e4 66{
bd4c625c
LT		 67 if (!(s->s_flags & MS_RDONLY)) {
68 struct reiserfs_transaction_handle th;
69 reiserfs_write_lock(s);
70 if (!journal_begin(&th, s, 1))
71 if (!journal_end_sync(&th, s, 1))
72 reiserfs_flush_old_commits(s);
73 s->s_dirt = 0; /* Even if it's not true.
74 * We'll loop forever in sync_supers otherwise */
75 reiserfs_write_unlock(s);
76 } else {
77 s->s_dirt = 0;
78 }
79 return 0;
1da177e4
LT		 80}
81
82static void reiserfs_write_super(struct super_block *s)
83{
bd4c625c 84 reiserfs_sync_fs(s, 1);
1da177e4
LT		 85}
86
bd4c625c 87static void reiserfs_write_super_lockfs(struct super_block *s)
1da177e4 88{
bd4c625c
LT		 89 struct reiserfs_transaction_handle th;
90 reiserfs_write_lock(s);
91 if (!(s->s_flags & MS_RDONLY)) {
92 int err = journal_begin(&th, s, 1);
93 if (err) {
94 reiserfs_block_writes(&th);
95 } else {
96 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
97 1);
98 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
99 reiserfs_block_writes(&th);
100 journal_end_sync(&th, s, 1);
101 }
102 }
103 s->s_dirt = 0;
104 reiserfs_write_unlock(s);
1da177e4
LT		 105}
106
bd4c625c
LT		 107static void reiserfs_unlockfs(struct super_block *s)
108{
109 reiserfs_allow_writes(s);
1da177e4
LT		 110}
111
bd4c625c 112extern 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		 121static 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
141static 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 145static 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;
1da177e4 161#endif
bd4c625c
LT		 162
163 /* compose key to look for "save" links */
164 max_cpu_key.version = KEY_FORMAT_3_5;
165 max_cpu_key.on_disk_key.k_dir_id = ~0U;
166 max_cpu_key.on_disk_key.k_objectid = ~0U;
167 set_cpu_key_k_offset(&max_cpu_key, ~0U);
168 max_cpu_key.key_length = 3;
1da177e4 169
fb46f341
LW		 170 memset(&last_inode_key, 0, sizeof(last_inode_key));
171
1da177e4 172#ifdef CONFIG_QUOTA
bd4c625c
LT		 173 /* Needed for iput() to work correctly and not trash data */
174 if (s->s_flags & MS_ACTIVE) {
175 ms_active_set = 0;
176 } else {
177 ms_active_set = 1;
178 s->s_flags |= MS_ACTIVE;
179 }
180 /* Turn on quotas so that they are updated correctly */
181 for (i = 0; i < MAXQUOTAS; i++) {
182 if (REISERFS_SB(s)->s_qf_names[i]) {
183 int ret = reiserfs_quota_on_mount(s, i);
184 if (ret < 0)
185 reiserfs_warning(s,
4506567b 186 "reiserfs: cannot turn on journaled quota: error %d",
bd4c625c
LT		 187 ret);
188 }
189 }
1da177e4 190#endif
bd4c625c
LT		 191
192 done = 0;
193 REISERFS_SB(s)->s_is_unlinked_ok = 1;
194 while (!retval) {
195 retval = search_item(s, &max_cpu_key, &path);
196 if (retval != ITEM_NOT_FOUND) {
197 reiserfs_warning(s,
198 "vs-2140: finish_unfinished: search_by_key returned %d",
199 retval);
200 break;
201 }
202
203 bh = get_last_bh(&path);
204 item_pos = get_item_pos(&path);
205 if (item_pos != B_NR_ITEMS(bh)) {
206 reiserfs_warning(s,
207 "vs-2060: finish_unfinished: wrong position found");
208 break;
209 }
210 item_pos--;
211 ih = B_N_PITEM_HEAD(bh, item_pos);
212
213 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
214 /* there are no "save" links anymore */
215 break;
216
217 save_link_key = ih->ih_key;
218 if (is_indirect_le_ih(ih))
219 truncate = 1;
220 else
221 truncate = 0;
222
223 /* reiserfs_iget needs k_dirid and k_objectid only */
224 item = B_I_PITEM(bh, ih);
225 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
226 obj_key.on_disk_key.k_objectid =
227 le32_to_cpu(ih->ih_key.k_objectid);
228 obj_key.on_disk_key.k_offset = 0;
229 obj_key.on_disk_key.k_type = 0;
230
231 pathrelse(&path);
232
233 inode = reiserfs_iget(s, &obj_key);
234 if (!inode) {
235 /* the unlink almost completed, it just did not manage to remove
236 "save" link and release objectid */
237 reiserfs_warning(s,
238 "vs-2180: finish_unfinished: iget failed for %K",
239 &obj_key);
240 retval = remove_save_link_only(s, &save_link_key, 1);
241 continue;
242 }
243
244 if (!truncate && inode->i_nlink) {
245 /* file is not unlinked */
246 reiserfs_warning(s,
247 "vs-2185: finish_unfinished: file %K is not unlinked",
248 &obj_key);
249 retval = remove_save_link_only(s, &save_link_key, 0);
250 continue;
251 }
252 DQUOT_INIT(inode);
253
254 if (truncate && S_ISDIR(inode->i_mode)) {
255 /* We got a truncate request for a dir which is impossible.
256 The only imaginable way is to execute unfinished truncate request
257 then boot into old kernel, remove the file and create dir with
258 the same key. */
259 reiserfs_warning(s,
260 "green-2101: impossible truncate on a directory %k. Please report",
261 INODE_PKEY(inode));
262 retval = remove_save_link_only(s, &save_link_key, 0);
263 truncate = 0;
264 iput(inode);
265 continue;
266 }
267
268 if (truncate) {
269 REISERFS_I(inode)->i_flags |=
270 i_link_saved_truncate_mask;
271 /* not completed truncate found. New size was committed together
272 with "save" link */
273 reiserfs_info(s, "Truncating %k to %Ld ..",
274 INODE_PKEY(inode), inode->i_size);
275 reiserfs_truncate_file(inode,
276 0
277 /*don't update modification time */
278 );
279 retval = remove_save_link(inode, truncate);
280 } else {
281 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
282 /* not completed unlink (rmdir) found */
283 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
fb46f341
LW		 284 if (memcmp(&last_inode_key, INODE_PKEY(inode),
285 sizeof(last_inode_key))){
286 last_inode_key = *INODE_PKEY(inode);
287 /* removal gets completed in iput */
288 retval = 0;
289 } else {
290 reiserfs_warning(s, "Dead loop in "
291 "finish_unfinished detected, "
292 "just remove save link\n");
293 retval = remove_save_link_only(s,
294 &save_link_key, 0);
295 }
bd4c625c
LT		 296 }
297
298 iput(inode);
299 printk("done\n");
300 done++;
301 }
302 REISERFS_SB(s)->s_is_unlinked_ok = 0;
303
1da177e4 304#ifdef CONFIG_QUOTA
bd4c625c
LT		 305 /* Turn quotas off */
306 for (i = 0; i < MAXQUOTAS; i++) {
307 if (sb_dqopt(s)->files[i])
1b445a9c 308 vfs_quota_off(s, i, 0);
bd4c625c
LT		 309 }
310 if (ms_active_set)
311 /* Restore the flag back */
312 s->s_flags &= ~MS_ACTIVE;
1da177e4 313#endif
bd4c625c
LT		 314 pathrelse(&path);
315 if (done)
316 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
317 "Completed\n", done);
318 return retval;
1da177e4 319}
bd4c625c 320
1da177e4
LT		 321/* to protect file being unlinked from getting lost we "safe" link files
322 being unlinked. This link will be deleted in the same transaction with last
3a4fa0a2 323 item of file. mounting the filesystem we scan all these links and remove
1da177e4 324 files which almost got lost */
bd4c625c
LT		 325void add_save_link(struct reiserfs_transaction_handle *th,
326 struct inode *inode, int truncate)
1da177e4 327{
bd4c625c
LT		 328 INITIALIZE_PATH(path);
329 int retval;
330 struct cpu_key key;
331 struct item_head ih;
332 __le32 link;
333
334 BUG_ON(!th->t_trans_id);
335
336 /* file can only get one "save link" of each kind */
337 RFALSE(truncate &&
338 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
339 "saved link already exists for truncated inode %lx",
340 (long)inode->i_ino);
341 RFALSE(!truncate &&
342 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
343 "saved link already exists for unlinked inode %lx",
344 (long)inode->i_ino);
345
346 /* setup key of "save" link */
347 key.version = KEY_FORMAT_3_5;
348 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
349 key.on_disk_key.k_objectid = inode->i_ino;
350 if (!truncate) {
351 /* unlink, rmdir, rename */
352 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
353 set_cpu_key_k_type(&key, TYPE_DIRECT);
354
355 /* item head of "safe" link */
356 make_le_item_head(&ih, &key, key.version,
357 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
358 4 /*length */ , 0xffff /*free space */ );
359 } else {
360 /* truncate */
361 if (S_ISDIR(inode->i_mode))
362 reiserfs_warning(inode->i_sb,
363 "green-2102: Adding a truncate savelink for a directory %k! Please report",
364 INODE_PKEY(inode));
365 set_cpu_key_k_offset(&key, 1);
366 set_cpu_key_k_type(&key, TYPE_INDIRECT);
367
368 /* item head of "safe" link */
369 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
370 4 /*length */ , 0 /*free space */ );
371 }
372 key.key_length = 3;
373
374 /* look for its place in the tree */
375 retval = search_item(inode->i_sb, &key, &path);
376 if (retval != ITEM_NOT_FOUND) {
377 if (retval != -ENOSPC)
378 reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:"
379 "search_by_key (%K) returned %d", &key,
380 retval);
381 pathrelse(&path);
382 return;
383 }
1da177e4 384
bd4c625c
LT		 385 /* body of "save" link */
386 link = INODE_PKEY(inode)->k_dir_id;
387
388 /* put "save" link inot tree, don't charge quota to anyone */
389 retval =
390 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
391 if (retval) {
392 if (retval != -ENOSPC)
393 reiserfs_warning(inode->i_sb,
394 "vs-2120: add_save_link: insert_item returned %d",
395 retval);
396 } else {
397 if (truncate)
398 REISERFS_I(inode)->i_flags |=
399 i_link_saved_truncate_mask;
400 else
401 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
402 }
403}
1da177e4
LT		 404
405/* this opens transaction unlike add_save_link */
bd4c625c 406int remove_save_link(struct inode *inode, int truncate)
1da177e4 407{
bd4c625c
LT		 408 struct reiserfs_transaction_handle th;
409 struct reiserfs_key key;
410 int err;
411
412 /* we are going to do one balancing only */
413 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
414 if (err)
415 return err;
416
417 /* setup key of "save" link */
418 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
419 key.k_objectid = INODE_PKEY(inode)->k_objectid;
420 if (!truncate) {
421 /* unlink, rmdir, rename */
422 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
423 1 + inode->i_sb->s_blocksize);
424 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
425 } else {
426 /* truncate */
427 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
428 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
429 }
1da177e4 430
bd4c625c
LT		 431 if ((truncate &&
432 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
433 (!truncate &&
434 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
435 /* don't take quota bytes from anywhere */
436 reiserfs_delete_solid_item(&th, NULL, &key);
437 if (!truncate) {
438 reiserfs_release_objectid(&th, inode->i_ino);
439 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
440 } else
441 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
442
443 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
444}
1da177e4 445
edc666e2 446static void reiserfs_kill_sb(struct super_block *s)
1da177e4 447{
edc666e2 448 if (REISERFS_SB(s)) {
fe08a9d4 449#ifdef CONFIG_REISERFS_FS_XATTR
edc666e2
DH		 450 if (REISERFS_SB(s)->xattr_root) {
451 d_invalidate(REISERFS_SB(s)->xattr_root);
452 dput(REISERFS_SB(s)->xattr_root);
453 REISERFS_SB(s)->xattr_root = NULL;
454 }
fe08a9d4 455#endif
edc666e2
DH		 456 if (REISERFS_SB(s)->priv_root) {
457 d_invalidate(REISERFS_SB(s)->priv_root);
458 dput(REISERFS_SB(s)->priv_root);
459 REISERFS_SB(s)->priv_root = NULL;
460 }
bd4c625c
LT		 461 }
462
edc666e2
DH		 463 kill_block_super(s);
464}
465
466static void reiserfs_put_super(struct super_block *s)
467{
468 struct reiserfs_transaction_handle th;
469 th.t_trans_id = 0;
bd4c625c
LT		 470
471 /* change file system state to current state if it was mounted with read-write permissions */
472 if (!(s->s_flags & MS_RDONLY)) {
473 if (!journal_begin(&th, s, 10)) {
474 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
475 1);
476 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
477 REISERFS_SB(s)->s_mount_state);
478 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
479 }
480 }
481
482 /* note, journal_release checks for readonly mount, and can decide not
483 ** to do a journal_end
484 */
485 journal_release(&th, s);
486
5065227b 487 reiserfs_free_bitmap_cache(s);
bd4c625c
LT		 488
489 brelse(SB_BUFFER_WITH_SB(s));
490
491 print_statistics(s);
492
bd4c625c
LT		 493 if (REISERFS_SB(s)->reserved_blocks != 0) {
494 reiserfs_warning(s,
495 "green-2005: reiserfs_put_super: reserved blocks left %d",
496 REISERFS_SB(s)->reserved_blocks);
497 }
498
499 reiserfs_proc_info_done(s);
500
501 kfree(s->s_fs_info);
502 s->s_fs_info = NULL;
503
504 return;
1da177e4
LT		 505}
506
e18b890b 507static struct kmem_cache *reiserfs_inode_cachep;
1da177e4
LT		 508
509static struct inode *reiserfs_alloc_inode(struct super_block *sb)
510{
511 struct reiserfs_inode_info *ei;
bd4c625c 512 ei = (struct reiserfs_inode_info *)
e94b1766 513 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 514 if (!ei)
515 return NULL;
516 return &ei->vfs_inode;
517}
518
519static void reiserfs_destroy_inode(struct inode *inode)
520{
521 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
522}
523
51cc5068 524static void init_once(void *foo)
1da177e4 525{
bd4c625c 526 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
1da177e4 527
a35afb83
CL		 528 INIT_LIST_HEAD(&ei->i_prealloc_list);
529 inode_init_once(&ei->vfs_inode);
cfe14677 530#ifdef CONFIG_REISERFS_FS_POSIX_ACL
a35afb83
CL		 531 ei->i_acl_access = NULL;
532 ei->i_acl_default = NULL;
cfe14677 533#endif
1da177e4 534}
bd4c625c 535
1da177e4
LT		 536static int init_inodecache(void)
537{
538 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
bd4c625c
LT		 539 sizeof(struct
540 reiserfs_inode_info),
fffb60f9
PJ		 541 0, (SLAB_RECLAIM_ACCOUNT|
542 SLAB_MEM_SPREAD),
20c2df83 543 init_once);
1da177e4
LT		 544 if (reiserfs_inode_cachep == NULL)
545 return -ENOMEM;
546 return 0;
547}
548
549static void destroy_inodecache(void)
550{
1a1d92c1 551 kmem_cache_destroy(reiserfs_inode_cachep);
1da177e4
LT		 552}
553
554/* we don't mark inodes dirty, we just log them */
bd4c625c
LT		 555static void reiserfs_dirty_inode(struct inode *inode)
556{
557 struct reiserfs_transaction_handle th;
558
559 int err = 0;
560 if (inode->i_sb->s_flags & MS_RDONLY) {
561 reiserfs_warning(inode->i_sb,
562 "clm-6006: writing inode %lu on readonly FS",
563 inode->i_ino);
564 return;
565 }
566 reiserfs_write_lock(inode->i_sb);
567
568 /* this is really only used for atime updates, so they don't have
569 ** to be included in O_SYNC or fsync
570 */
571 err = journal_begin(&th, inode->i_sb, 1);
572 if (err) {
573 reiserfs_write_unlock(inode->i_sb);
574 return;
575 }
576 reiserfs_update_sd(&th, inode);
577 journal_end(&th, inode->i_sb, 1);
578 reiserfs_write_unlock(inode->i_sb);
1da177e4
LT		 579}
580
cfe14677 581#ifdef CONFIG_REISERFS_FS_POSIX_ACL
bd4c625c 582static void reiserfs_clear_inode(struct inode *inode)
1da177e4 583{
bd4c625c 584 struct posix_acl *acl;
1da177e4 585
bd4c625c
LT		 586 acl = REISERFS_I(inode)->i_acl_access;
587 if (acl && !IS_ERR(acl))
588 posix_acl_release(acl);
589 REISERFS_I(inode)->i_acl_access = NULL;
1da177e4 590
bd4c625c
LT		 591 acl = REISERFS_I(inode)->i_acl_default;
592 if (acl && !IS_ERR(acl))
593 posix_acl_release(acl);
594 REISERFS_I(inode)->i_acl_default = NULL;
1da177e4 595}
cfe14677
AD		 596#else
597#define reiserfs_clear_inode NULL
598#endif
1da177e4
LT		 599
600#ifdef CONFIG_QUOTA
bd4c625c
LT		 601static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
602 size_t, loff_t);
603static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
604 loff_t);
1da177e4
LT		 605#endif
606
ee9b6d61 607static const struct super_operations reiserfs_sops = {
bd4c625c
LT		 608 .alloc_inode = reiserfs_alloc_inode,
609 .destroy_inode = reiserfs_destroy_inode,
610 .write_inode = reiserfs_write_inode,
611 .dirty_inode = reiserfs_dirty_inode,
612 .delete_inode = reiserfs_delete_inode,
613 .clear_inode = reiserfs_clear_inode,
614 .put_super = reiserfs_put_super,
615 .write_super = reiserfs_write_super,
616 .sync_fs = reiserfs_sync_fs,
617 .write_super_lockfs = reiserfs_write_super_lockfs,
618 .unlockfs = reiserfs_unlockfs,
619 .statfs = reiserfs_statfs,
620 .remount_fs = reiserfs_remount,
cdf6ccc8 621 .show_options = generic_show_options,
1da177e4 622#ifdef CONFIG_QUOTA
bd4c625c
LT		 623 .quota_read = reiserfs_quota_read,
624 .quota_write = reiserfs_quota_write,
1da177e4
LT		 625#endif
626};
627
628#ifdef CONFIG_QUOTA
629#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
630
631static int reiserfs_dquot_initialize(struct inode *, int);
632static int reiserfs_dquot_drop(struct inode *);
633static int reiserfs_write_dquot(struct dquot *);
634static int reiserfs_acquire_dquot(struct dquot *);
635static int reiserfs_release_dquot(struct dquot *);
636static int reiserfs_mark_dquot_dirty(struct dquot *);
637static int reiserfs_write_info(struct super_block *, int);
1b445a9c 638static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
1da177e4 639
bd4c625c
LT		 640static struct dquot_operations reiserfs_quota_operations = {
641 .initialize = reiserfs_dquot_initialize,
642 .drop = reiserfs_dquot_drop,
643 .alloc_space = dquot_alloc_space,
644 .alloc_inode = dquot_alloc_inode,
645 .free_space = dquot_free_space,
646 .free_inode = dquot_free_inode,
647 .transfer = dquot_transfer,
648 .write_dquot = reiserfs_write_dquot,
649 .acquire_dquot = reiserfs_acquire_dquot,
650 .release_dquot = reiserfs_release_dquot,
651 .mark_dirty = reiserfs_mark_dquot_dirty,
652 .write_info = reiserfs_write_info,
1da177e4
LT		 653};
654
bd4c625c
LT		 655static struct quotactl_ops reiserfs_qctl_operations = {
656 .quota_on = reiserfs_quota_on,
657 .quota_off = vfs_quota_off,
658 .quota_sync = vfs_quota_sync,
659 .get_info = vfs_get_dqinfo,
660 .set_info = vfs_set_dqinfo,
661 .get_dqblk = vfs_get_dqblk,
662 .set_dqblk = vfs_set_dqblk,
1da177e4
LT		 663};
664#endif
665
39655164 666static const struct export_operations reiserfs_export_ops = {
bd4c625c 667 .encode_fh = reiserfs_encode_fh,
be55caf1
CH		 668 .fh_to_dentry = reiserfs_fh_to_dentry,
669 .fh_to_parent = reiserfs_fh_to_parent,
bd4c625c 670 .get_parent = reiserfs_get_parent,
bd4c625c 671};
1da177e4
LT		 672
673/* this struct is used in reiserfs_getopt () for containing the value for those
674 mount options that have values rather than being toggles. */
675typedef struct {
bd4c625c
LT		 676 char *value;
677 int setmask; /* bitmask which is to set on mount_options bitmask when this
678 value is found, 0 is no bits are to be changed. */
679 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
680 value is found, 0 is no bits are to be changed. This is
681 applied BEFORE setmask */
1da177e4
LT		 682} arg_desc_t;
683
684/* Set this bit in arg_required to allow empty arguments */
685#define REISERFS_OPT_ALLOWEMPTY 31
686
687/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
688 mount options */
689typedef struct {
bd4c625c
LT		 690 char *option_name;
691 int arg_required; /* 0 if argument is not required, not 0 otherwise */
692 const arg_desc_t *values; /* list of values accepted by an option */
693 int setmask; /* bitmask which is to set on mount_options bitmask when this
694 value is found, 0 is no bits are to be changed. */
695 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
696 value is found, 0 is no bits are to be changed. This is
697 applied BEFORE setmask */
1da177e4
LT		 698} opt_desc_t;
699
700/* possible values for -o data= */
701static const arg_desc_t logging_mode[] = {
bd4c625c
LT		 702 {"ordered", 1 << REISERFS_DATA_ORDERED,
703 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
704 {"journal", 1 << REISERFS_DATA_LOG,
705 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
706 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
707 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
cd02b966 708 {.value = NULL}
1da177e4
LT		 709};
710
711/* possible values for -o barrier= */
712static const arg_desc_t barrier_mode[] = {
bd4c625c
LT		 713 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
714 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
cd02b966 715 {.value = NULL}
1da177e4
LT		 716};
717
718/* possible values for "-o block-allocator=" and bits which are to be set in
719 s_mount_opt of reiserfs specific part of in-core super block */
720static const arg_desc_t balloc[] = {
bd4c625c
LT		 721 {"noborder", 1 << REISERFS_NO_BORDER, 0},
722 {"border", 0, 1 << REISERFS_NO_BORDER},
723 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
724 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
725 {"test4", 1 << REISERFS_TEST4, 0},
726 {"notest4", 0, 1 << REISERFS_TEST4},
727 {NULL, 0, 0}
1da177e4
LT		 728};
729
730static const arg_desc_t tails[] = {
bd4c625c
LT		 731 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
732 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
733 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
734 {NULL, 0, 0}
1da177e4
LT		 735};
736
737static const arg_desc_t error_actions[] = {
bd4c625c
LT		 738 {"panic", 1 << REISERFS_ERROR_PANIC,
739 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
740 {"ro-remount", 1 << REISERFS_ERROR_RO,
741 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
1da177e4 742#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
bd4c625c
LT		 743 {"continue", 1 << REISERFS_ERROR_CONTINUE,
744 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
1da177e4 745#endif
bd4c625c 746 {NULL, 0, 0},
1da177e4
LT		 747};
748
1da177e4
LT		 749/* proceed only one option from a list *cur - string containing of mount options
750 opts - array of options which are accepted
751 opt_arg - if option is found and requires an argument and if it is specifed
752 in the input - pointer to the argument is stored here
753 bit_flags - if option requires to set a certain bit - it is set here
754 return -1 if unknown option is found, opt->arg_required otherwise */
bd4c625c
LT		 755static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
756 char **opt_arg, unsigned long *bit_flags)
1da177e4 757{
bd4c625c
LT		 758 char *p;
759 /* foo=bar,
760 ^ ^ ^
761 | | +-- option_end
762 | +-- arg_start
763 +-- option_start
764 */
765 const opt_desc_t *opt;
766 const arg_desc_t *arg;
767
768 p = *cur;
769
770 /* assume argument cannot contain commas */
771 *cur = strchr(p, ',');
772 if (*cur) {
773 *(*cur) = '\0';
774 (*cur)++;
775 }
776
777 if (!strncmp(p, "alloc=", 6)) {
778 /* Ugly special case, probably we should redo options parser so that
779 it can understand several arguments for some options, also so that
780 it can fill several bitfields with option values. */
781 if (reiserfs_parse_alloc_options(s, p + 6)) {
782 return -1;
783 } else {
784 return 0;
785 }
786 }
787
788 /* for every option in the list */
789 for (opt = opts; opt->option_name; opt++) {
790 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
791 if (bit_flags) {
792 if (opt->clrmask ==
793 (1 << REISERFS_UNSUPPORTED_OPT))
794 reiserfs_warning(s, "%s not supported.",
795 p);
796 else
797 *bit_flags &= ~opt->clrmask;
798 if (opt->setmask ==
799 (1 << REISERFS_UNSUPPORTED_OPT))
800 reiserfs_warning(s, "%s not supported.",
801 p);
802 else
803 *bit_flags |= opt->setmask;
804 }
805 break;
806 }
807 }
808 if (!opt->option_name) {
809 reiserfs_warning(s, "unknown mount option \"%s\"", p);
810 return -1;
811 }
812
813 p += strlen(opt->option_name);
814 switch (*p) {
815 case '=':
816 if (!opt->arg_required) {
817 reiserfs_warning(s,
818 "the option \"%s\" does not require an argument",
819 opt->option_name);
820 return -1;
821 }
822 break;
823
824 case 0:
825 if (opt->arg_required) {
826 reiserfs_warning(s,
827 "the option \"%s\" requires an argument",
828 opt->option_name);
829 return -1;
830 }
831 break;
832 default:
833 reiserfs_warning(s, "head of option \"%s\" is only correct",
834 opt->option_name);
835 return -1;
836 }
837
838 /* move to the argument, or to next option if argument is not required */
839 p++;
840
841 if (opt->arg_required
842 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
843 && !strlen(p)) {
844 /* this catches "option=," if not allowed */
845 reiserfs_warning(s, "empty argument for \"%s\"",
846 opt->option_name);
847 return -1;
848 }
849
850 if (!opt->values) {
851 /* *=NULLopt_arg contains pointer to argument */
852 *opt_arg = p;
853 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
854 }
855
856 /* values possible for this option are listed in opt->values */
857 for (arg = opt->values; arg->value; arg++) {
858 if (!strcmp(p, arg->value)) {
859 if (bit_flags) {
860 *bit_flags &= ~arg->clrmask;
861 *bit_flags |= arg->setmask;
862 }
863 return opt->arg_required;
864 }
865 }
866
867 reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
868 opt->option_name);
1da177e4 869 return -1;
1da177e4
LT		 870}
871
872/* returns 0 if something is wrong in option string, 1 - otherwise */
bd4c625c
LT		 873static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
874 unsigned long *mount_options,
875 /* after the parsing phase, contains the
876 collection of bitflags defining what
877 mount options were selected. */
878 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
879 char **jdev_name,
00b44197
JK		 880 unsigned int *commit_max_age,
881 char **qf_names,
882 unsigned int *qfmt)
1da177e4 883{
bd4c625c
LT		 884 int c;
885 char *arg = NULL;
886 char *pos;
887 opt_desc_t opts[] = {
888 /* Compatibility stuff, so that -o notail for old setups still work */
889 {"tails",.arg_required = 't',.values = tails},
890 {"notail",.clrmask =
891 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
892 {"conv",.setmask = 1 << REISERFS_CONVERT},
893 {"attrs",.setmask = 1 << REISERFS_ATTRS},
894 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1da177e4 895#ifdef CONFIG_REISERFS_FS_XATTR
bd4c625c
LT		 896 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
897 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1da177e4 898#else
bd4c625c
LT		 899 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
900 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1da177e4
LT		 901#endif
902#ifdef CONFIG_REISERFS_FS_POSIX_ACL
bd4c625c
LT		 903 {"acl",.setmask = 1 << REISERFS_POSIXACL},
904 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1da177e4 905#else
bd4c625c
LT		 906 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
907 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1da177e4 908#endif
cd02b966 909 {.option_name = "nolog"},
bd4c625c
LT		 910 {"replayonly",.setmask = 1 << REPLAYONLY},
911 {"block-allocator",.arg_required = 'a',.values = balloc},
912 {"data",.arg_required = 'd',.values = logging_mode},
913 {"barrier",.arg_required = 'b',.values = barrier_mode},
914 {"resize",.arg_required = 'r',.values = NULL},
915 {"jdev",.arg_required = 'j',.values = NULL},
916 {"nolargeio",.arg_required = 'w',.values = NULL},
917 {"commit",.arg_required = 'c',.values = NULL},
918 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
919 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
920 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
921 {"errors",.arg_required = 'e',.values = error_actions},
922 {"usrjquota",.arg_required =
923 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
924 {"grpjquota",.arg_required =
925 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
926 {"jqfmt",.arg_required = 'f',.values = NULL},
cd02b966 927 {.option_name = NULL}
bd4c625c
LT		 928 };
929
930 *blocks = 0;
931 if (!options || !*options)
932 /* use default configuration: create tails, journaling on, no
933 conversion to newest format */
934 return 1;
935
936 for (pos = options; pos;) {
937 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
938 if (c == -1)
939 /* wrong option is given */
9a3bb301 940 return 0;
1da177e4 941
bd4c625c
LT		 942 if (c == 'r') {
943 char *p;
944
945 p = NULL;
946 /* "resize=NNN" or "resize=auto" */
947
948 if (!strcmp(arg, "auto")) {
949 /* From JFS code, to auto-get the size. */
950 *blocks =
951 s->s_bdev->bd_inode->i_size >> s->
952 s_blocksize_bits;
953 } else {
954 *blocks = simple_strtoul(arg, &p, 0);
955 if (*p != '\0') {
956 /* NNN does not look like a number */
957 reiserfs_warning(s,
958 "reiserfs_parse_options: bad value %s",
959 arg);
960 return 0;
961 }
962 }
1da177e4 963 }
1da177e4 964
bd4c625c
LT		 965 if (c == 'c') {
966 char *p = NULL;
967 unsigned long val = simple_strtoul(arg, &p, 0);
968 /* commit=NNN (time in seconds) */
969 if (*p != '\0' || val >= (unsigned int)-1) {
970 reiserfs_warning(s,
971 "reiserfs_parse_options: bad value %s",
972 arg);
973 return 0;
974 }
975 *commit_max_age = (unsigned int)val;
1da177e4 976 }
1da177e4 977
bd4c625c 978 if (c == 'w') {
36b756f2
AB		 979 reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
980 return 0;
1da177e4 981 }
1da177e4 982
bd4c625c
LT		 983 if (c == 'j') {
984 if (arg && *arg && jdev_name) {
985 if (*jdev_name) { //Hm, already assigned?
986 reiserfs_warning(s,
987 "reiserfs_parse_options: journal device was already specified to be %s",
988 *jdev_name);
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
00b44197
JK		 998 if ((sb_any_quota_enabled(s) ||
999 sb_any_quota_suspended(s)) &&
1000 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
bd4c625c 1001 reiserfs_warning(s,
4506567b 1002 "reiserfs_parse_options: cannot change journaled quota options when quota turned on.");
bd4c625c
LT		 1003 return 0;
1004 }
1005 if (*arg) { /* Some filename specified? */
1006 if (REISERFS_SB(s)->s_qf_names[qtype]
1007 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1008 arg)) {
1009 reiserfs_warning(s,
1010 "reiserfs_parse_options: %s quota file already specified.",
1011 QTYPE2NAME(qtype));
1012 return 0;
1013 }
1014 if (strchr(arg, '/')) {
1015 reiserfs_warning(s,
1016 "reiserfs_parse_options: quotafile must be on filesystem root.");
1017 return 0;
1018 }
00b44197 1019 qf_names[qtype] =
bd4c625c 1020 kmalloc(strlen(arg) + 1, GFP_KERNEL);
00b44197 1021 if (!qf_names[qtype]) {
bd4c625c
LT		 1022 reiserfs_warning(s,
1023 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1024 return 0;
1025 }
00b44197 1026 strcpy(qf_names[qtype], arg);
bd4c625c
LT		 1027 *mount_options |= 1 << REISERFS_QUOTA;
1028 } else {
00b44197
JK		 1029 if (qf_names[qtype] !=
1030 REISERFS_SB(s)->s_qf_names[qtype])
1031 kfree(qf_names[qtype]);
1032 qf_names[qtype] = NULL;
bd4c625c 1033 }
1da177e4 1034 }
bd4c625c
LT		 1035 if (c == 'f') {
1036 if (!strcmp(arg, "vfsold"))
00b44197 1037 *qfmt = QFMT_VFS_OLD;
bd4c625c 1038 else if (!strcmp(arg, "vfsv0"))
00b44197 1039 *qfmt = QFMT_VFS_V0;
bd4c625c
LT		 1040 else {
1041 reiserfs_warning(s,
1042 "reiserfs_parse_options: unknown quota format specified.");
1043 return 0;
1044 }
00b44197
JK		 1045 if ((sb_any_quota_enabled(s) ||
1046 sb_any_quota_suspended(s)) &&
1047 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1048 reiserfs_warning(s,
1049 "reiserfs_parse_options: cannot change journaled quota options when quota turned on.");
1050 return 0;
1051 }
1da177e4 1052 }
bd4c625c
LT		 1053#else
1054 if (c == 'u' || c == 'g' || c == 'f') {
1055 reiserfs_warning(s,
4506567b 1056 "reiserfs_parse_options: journaled quota options not supported.");
bd4c625c 1057 return 0;
1da177e4 1058 }
bd4c625c
LT		 1059#endif
1060 }
1061
1062#ifdef CONFIG_QUOTA
00b44197
JK		 1063 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1064 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
bd4c625c 1065 reiserfs_warning(s,
4506567b 1066 "reiserfs_parse_options: journaled quota format not specified.");
1da177e4 1067 return 0;
1da177e4 1068 }
bd4c625c
LT		 1069 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1070 if (!(*mount_options & (1 << REISERFS_QUOTA))
1071 && sb_any_quota_enabled(s)) {
1072 reiserfs_warning(s,
1073 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1074 return 0;
1da177e4
LT		 1075 }
1076#endif
556a2a45 1077
bd4c625c 1078 return 1;
1da177e4
LT		 1079}
1080
bd4c625c
LT		 1081static void switch_data_mode(struct super_block *s, unsigned long mode)
1082{
1083 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1084 (1 << REISERFS_DATA_ORDERED) |
1085 (1 << REISERFS_DATA_WRITEBACK));
1086 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1da177e4
LT		 1087}
1088
1089static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1090{
bd4c625c
LT		 1091 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1092 if (!reiserfs_data_log(s)) {
1093 switch_data_mode(s, REISERFS_DATA_LOG);
1094 reiserfs_info(s, "switching to journaled data mode\n");
1095 }
1096 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1097 if (!reiserfs_data_ordered(s)) {
1098 switch_data_mode(s, REISERFS_DATA_ORDERED);
1099 reiserfs_info(s, "switching to ordered data mode\n");
1100 }
1101 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1102 if (!reiserfs_data_writeback(s)) {
1103 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1104 reiserfs_info(s, "switching to writeback data mode\n");
1105 }
1106 }
1da177e4
LT		 1107}
1108
bd4c625c
LT		 1109static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1110{
1111 int flush = (1 << REISERFS_BARRIER_FLUSH);
1112 int none = (1 << REISERFS_BARRIER_NONE);
1113 int all_barrier = flush | none;
1114
1115 if (bits & all_barrier) {
1116 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1117 if (bits & flush) {
1118 REISERFS_SB(s)->s_mount_opt |= flush;
1119 printk("reiserfs: enabling write barrier flush mode\n");
1120 } else if (bits & none) {
1121 REISERFS_SB(s)->s_mount_opt |= none;
1122 printk("reiserfs: write barriers turned off\n");
1123 }
1124 }
1da177e4
LT		 1125}
1126
bd4c625c 1127static void handle_attrs(struct super_block *s)
1da177e4 1128{
bd4c625c 1129 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1da177e4 1130
bd4c625c
LT		 1131 if (reiserfs_attrs(s)) {
1132 if (old_format_only(s)) {
1133 reiserfs_warning(s,
1134 "reiserfs: cannot support attributes on 3.5.x disk format");
1135 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1da177e4
LT		 1136 return;
1137 }
bd4c625c
LT		 1138 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1139 reiserfs_warning(s,
1140 "reiserfs: cannot support attributes until flag is set in super-block");
1141 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1da177e4
LT		 1142 }
1143 }
1144}
1145
00b44197
JK		 1146#ifdef CONFIG_QUOTA
1147static void handle_quota_files(struct super_block *s, char **qf_names,
1148 unsigned int *qfmt)
1149{
1150 int i;
1151
1152 for (i = 0; i < MAXQUOTAS; i++) {
1153 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1154 kfree(REISERFS_SB(s)->s_qf_names[i]);
1155 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1156 }
1157 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1158}
1159#endif
1160
bd4c625c 1161static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1da177e4 1162{
bd4c625c
LT		 1163 struct reiserfs_super_block *rs;
1164 struct reiserfs_transaction_handle th;
1165 unsigned long blocks;
1166 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1167 unsigned long safe_mask = 0;
1168 unsigned int commit_max_age = (unsigned int)-1;
1169 struct reiserfs_journal *journal = SB_JOURNAL(s);
cdf6ccc8 1170 char *new_opts = kstrdup(arg, GFP_KERNEL);
bd4c625c 1171 int err;
00b44197
JK		 1172 char *qf_names[MAXQUOTAS];
1173 unsigned int qfmt = 0;
1da177e4 1174#ifdef CONFIG_QUOTA
bd4c625c 1175 int i;
00b44197
JK		 1176
1177 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1da177e4
LT		 1178#endif
1179
bd4c625c 1180 rs = SB_DISK_SUPER_BLOCK(s);
1da177e4 1181
bd4c625c 1182 if (!reiserfs_parse_options
00b44197
JK		 1183 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1184 qf_names, &qfmt)) {
1da177e4 1185#ifdef CONFIG_QUOTA
00b44197
JK		 1186 for (i = 0; i < MAXQUOTAS; i++)
1187 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1188 kfree(qf_names[i]);
1da177e4 1189#endif
cdf6ccc8
MS		 1190 err = -EINVAL;
1191 goto out_err;
bd4c625c 1192 }
00b44197
JK		 1193#ifdef CONFIG_QUOTA
1194 handle_quota_files(s, qf_names, &qfmt);
1195#endif
bd4c625c
LT		 1196
1197 handle_attrs(s);
1198
1199 /* Add options that are safe here */
1200 safe_mask |= 1 << REISERFS_SMALLTAIL;
1201 safe_mask |= 1 << REISERFS_LARGETAIL;
1202 safe_mask |= 1 << REISERFS_NO_BORDER;
1203 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1204 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1205 safe_mask |= 1 << REISERFS_TEST4;
1206 safe_mask |= 1 << REISERFS_ATTRS;
1207 safe_mask |= 1 << REISERFS_XATTRS_USER;
1208 safe_mask |= 1 << REISERFS_POSIXACL;
1209 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1210 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1211 safe_mask |= 1 << REISERFS_ERROR_RO;
1212 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1213 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1214 safe_mask |= 1 << REISERFS_QUOTA;
1215
1216 /* Update the bitmask, taking care to keep
1217 * the bits we're not allowed to change here */
1218 REISERFS_SB(s)->s_mount_opt =
1219 (REISERFS_SB(s)->
1220 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1221
1222 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1223 journal->j_max_commit_age = commit_max_age;
1224 journal->j_max_trans_age = commit_max_age;
1225 } else if (commit_max_age == 0) {
1226 /* 0 means restore defaults. */
1227 journal->j_max_commit_age = journal->j_default_max_commit_age;
1228 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1229 }
1230
1231 if (blocks) {
cdf6ccc8
MS		 1232 err = reiserfs_resize(s, blocks);
1233 if (err != 0)
1234 goto out_err;
bd4c625c
LT		 1235 }
1236
1237 if (*mount_flags & MS_RDONLY) {
1238 reiserfs_xattr_init(s, *mount_flags);
1239 /* remount read-only */
1240 if (s->s_flags & MS_RDONLY)
1241 /* it is read-only already */
cdf6ccc8 1242 goto out_ok;
bd4c625c
LT		 1243 /* try to remount file system with read-only permissions */
1244 if (sb_umount_state(rs) == REISERFS_VALID_FS
1245 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
cdf6ccc8 1246 goto out_ok;
bd4c625c
LT		 1247 }
1248
1249 err = journal_begin(&th, s, 10);
1250 if (err)
cdf6ccc8 1251 goto out_err;
bd4c625c
LT		 1252
1253 /* Mounting a rw partition read-only. */
1254 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1255 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1256 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1257 } else {
1258 /* remount read-write */
1259 if (!(s->s_flags & MS_RDONLY)) {
1260 reiserfs_xattr_init(s, *mount_flags);
cdf6ccc8 1261 goto out_ok; /* We are read-write already */
bd4c625c
LT		 1262 }
1263
cdf6ccc8
MS		 1264 if (reiserfs_is_journal_aborted(journal)) {
1265 err = journal->j_errno;
1266 goto out_err;
1267 }
bd4c625c
LT		 1268
1269 handle_data_mode(s, mount_options);
1270 handle_barrier_mode(s, mount_options);
1271 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1272 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1273 err = journal_begin(&th, s, 10);
1274 if (err)
cdf6ccc8 1275 goto out_err;
bd4c625c
LT		 1276
1277 /* Mount a partition which is read-only, read-write */
1278 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1279 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1280 s->s_flags &= ~MS_RDONLY;
1281 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1282 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1283 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1284 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1285 }
1286 /* this will force a full flush of all journal lists */
1287 SB_JOURNAL(s)->j_must_wait = 1;
1288 err = journal_end(&th, s, 10);
1289 if (err)
cdf6ccc8 1290 goto out_err;
bd4c625c
LT		 1291 s->s_dirt = 0;
1292
1293 if (!(*mount_flags & MS_RDONLY)) {
1294 finish_unfinished(s);
1295 reiserfs_xattr_init(s, *mount_flags);
1296 }
1297
cdf6ccc8
MS		 1298out_ok:
1299 kfree(s->s_options);
1300 s->s_options = new_opts;
bd4c625c 1301 return 0;
cdf6ccc8
MS		 1302
1303out_err:
1304 kfree(new_opts);
1305 return err;
1da177e4
LT		 1306}
1307
bd4c625c 1308static int read_super_block(struct super_block *s, int offset)
1da177e4 1309{
bd4c625c
LT		 1310 struct buffer_head *bh;
1311 struct reiserfs_super_block *rs;
1312 int fs_blocksize;
1da177e4 1313
bd4c625c
LT		 1314 bh = sb_bread(s, offset / s->s_blocksize);
1315 if (!bh) {
1316 reiserfs_warning(s, "sh-2006: read_super_block: "
1317 "bread failed (dev %s, block %lu, size %lu)",
1318 reiserfs_bdevname(s), offset / s->s_blocksize,
1319 s->s_blocksize);
1320 return 1;
1321 }
1da177e4 1322
bd4c625c
LT		 1323 rs = (struct reiserfs_super_block *)bh->b_data;
1324 if (!is_any_reiserfs_magic_string(rs)) {
1325 brelse(bh);
1326 return 1;
1327 }
1328 //
1329 // ok, reiserfs signature (old or new) found in at the given offset
1330 //
1331 fs_blocksize = sb_blocksize(rs);
1332 brelse(bh);
1333 sb_set_blocksize(s, fs_blocksize);
1da177e4 1334
bd4c625c
LT		 1335 bh = sb_bread(s, offset / s->s_blocksize);
1336 if (!bh) {
1337 reiserfs_warning(s, "sh-2007: read_super_block: "
1338 "bread failed (dev %s, block %lu, size %lu)\n",
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 (sb_blocksize(rs) != s->s_blocksize) {
1346 reiserfs_warning(s, "sh-2011: read_super_block: "
1347 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1348 reiserfs_bdevname(s),
1349 (unsigned long long)bh->b_blocknr,
1350 s->s_blocksize);
1351 brelse(bh);
1352 return 1;
1353 }
1da177e4 1354
bd4c625c
LT		 1355 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1356 brelse(bh);
1357 reiserfs_warning(s,
1358 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1359 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1360 "get newer reiserfsprogs package");
1361 return 1;
1da177e4 1362 }
1da177e4 1363
bd4c625c
LT		 1364 SB_BUFFER_WITH_SB(s) = bh;
1365 SB_DISK_SUPER_BLOCK(s) = rs;
1366
1367 if (is_reiserfs_jr(rs)) {
1368 /* magic is of non-standard journal filesystem, look at s_version to
1369 find which format is in use */
1370 if (sb_version(rs) == REISERFS_VERSION_2)
1371 reiserfs_warning(s,
1372 "read_super_block: found reiserfs format \"3.6\""
1373 " with non-standard journal");
1374 else if (sb_version(rs) == REISERFS_VERSION_1)
1375 reiserfs_warning(s,
1376 "read_super_block: found reiserfs format \"3.5\""
1377 " with non-standard journal");
1378 else {
1379 reiserfs_warning(s,
1380 "sh-2012: read_super_block: found unknown "
1381 "format \"%u\" of reiserfs with non-standard magic",
1382 sb_version(rs));
1383 return 1;
1384 }
1385 } else
1386 /* s_version of standard format may contain incorrect information,
1387 so we just look at the magic string */
1388 reiserfs_info(s,
1389 "found reiserfs format \"%s\" with standard journal\n",
1390 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1391
1392 s->s_op = &reiserfs_sops;
1393 s->s_export_op = &reiserfs_export_ops;
1da177e4 1394#ifdef CONFIG_QUOTA
bd4c625c
LT		 1395 s->s_qcop = &reiserfs_qctl_operations;
1396 s->dq_op = &reiserfs_quota_operations;
1da177e4
LT		 1397#endif
1398
bd4c625c
LT		 1399 /* new format is limited by the 32 bit wide i_blocks field, want to
1400 ** be one full block below that.
1401 */
1402 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1403 return 0;
1da177e4
LT		 1404}
1405
1da177e4 1406/* after journal replay, reread all bitmap and super blocks */
bd4c625c
LT		 1407static int reread_meta_blocks(struct super_block *s)
1408{
bd4c625c
LT		 1409 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1410 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1411 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1412 reiserfs_warning(s,
1413 "reread_meta_blocks, error reading the super");
1414 return 1;
1415 }
1da177e4 1416
bd4c625c 1417 return 0;
bd4c625c 1418}
1da177e4
LT		 1419
1420/////////////////////////////////////////////////////
1421// hash detection stuff
1422
1da177e4
LT		 1423// if root directory is empty - we set default - Yura's - hash and
1424// warn about it
1425// FIXME: we look for only one name in a directory. If tea and yura
1426// bith have the same value - we ask user to send report to the
1427// mailing list
bd4c625c 1428static __u32 find_hash_out(struct super_block *s)
1da177e4 1429{
bd4c625c
LT		 1430 int retval;
1431 struct inode *inode;
1432 struct cpu_key key;
1433 INITIALIZE_PATH(path);
1434 struct reiserfs_dir_entry de;
1435 __u32 hash = DEFAULT_HASH;
1436
1437 inode = s->s_root->d_inode;
1438
1439 do { // Some serious "goto"-hater was there ;)
1440 u32 teahash, r5hash, yurahash;
1441
1442 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1443 retval = search_by_entry_key(s, &key, &path, &de);
1444 if (retval == IO_ERROR) {
1445 pathrelse(&path);
1446 return UNSET_HASH;
1447 }
1448 if (retval == NAME_NOT_FOUND)
1449 de.de_entry_num--;
1450 set_de_name_and_namelen(&de);
1451 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1452 /* allow override in this case */
1453 if (reiserfs_rupasov_hash(s)) {
1454 hash = YURA_HASH;
1455 }
1456 reiserfs_warning(s, "FS seems to be empty, autodetect "
1457 "is using the default hash");
1458 break;
1459 }
1460 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1461 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1462 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1463 if (((teahash == r5hash)
1464 &&
1465 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1466 == r5hash)) || ((teahash == yurahash)
1467 && (yurahash ==
1468 GET_HASH_VALUE(deh_offset
1469 (&
1470 (de.
1471 de_deh[de.
1472 de_entry_num])))))
1473 || ((r5hash == yurahash)
1474 && (yurahash ==
1475 GET_HASH_VALUE(deh_offset
1476 (&(de.de_deh[de.de_entry_num])))))) {
1477 reiserfs_warning(s,
1478 "Unable to automatically detect hash function. "
1479 "Please mount with -o hash={tea,rupasov,r5}",
1480 reiserfs_bdevname(s));
1481 hash = UNSET_HASH;
1482 break;
1483 }
1484 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1485 yurahash)
1486 hash = YURA_HASH;
1487 else if (GET_HASH_VALUE
1488 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1489 hash = TEA_HASH;
1490 else if (GET_HASH_VALUE
1491 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1492 hash = R5_HASH;
1493 else {
1494 reiserfs_warning(s, "Unrecognised hash function");
1495 hash = UNSET_HASH;
1496 }
1497 } while (0);
1498
1499 pathrelse(&path);
1500 return hash;
1da177e4
LT		 1501}
1502
1503// finds out which hash names are sorted with
bd4c625c 1504static int what_hash(struct super_block *s)
1da177e4 1505{
bd4c625c
LT		 1506 __u32 code;
1507
1508 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1509
1510 /* reiserfs_hash_detect() == true if any of the hash mount options
1511 ** were used. We must check them to make sure the user isn't
1512 ** using a bad hash value
1513 */
1514 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1515 code = find_hash_out(s);
1516
1517 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1518 /* detection has found the hash, and we must check against the
1519 ** mount options
1520 */
1521 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1522 reiserfs_warning(s, "Error, %s hash detected, "
1523 "unable to force rupasov hash",
1524 reiserfs_hashname(code));
1525 code = UNSET_HASH;
1526 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1527 reiserfs_warning(s, "Error, %s hash detected, "
1528 "unable to force tea hash",
1529 reiserfs_hashname(code));
1530 code = UNSET_HASH;
1531 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1532 reiserfs_warning(s, "Error, %s hash detected, "
1533 "unable to force r5 hash",
1534 reiserfs_hashname(code));
1535 code = UNSET_HASH;
1536 }
1537 } else {
1538 /* find_hash_out was not called or could not determine the hash */
1539 if (reiserfs_rupasov_hash(s)) {
1540 code = YURA_HASH;
1541 } else if (reiserfs_tea_hash(s)) {
1542 code = TEA_HASH;
1543 } else if (reiserfs_r5_hash(s)) {
1544 code = R5_HASH;
1545 }
1546 }
1547
1548 /* if we are mounted RW, and we have a new valid hash code, update
1549 ** the super
1550 */
1551 if (code != UNSET_HASH &&
1552 !(s->s_flags & MS_RDONLY) &&
1553 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1554 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1555 }
1556 return code;
1da177e4
LT		 1557}
1558
1559// return pointer to appropriate function
bd4c625c 1560static hashf_t hash_function(struct super_block *s)
1da177e4 1561{
bd4c625c
LT		 1562 switch (what_hash(s)) {
1563 case TEA_HASH:
1564 reiserfs_info(s, "Using tea hash to sort names\n");
1565 return keyed_hash;
1566 case YURA_HASH:
1567 reiserfs_info(s, "Using rupasov hash to sort names\n");
1568 return yura_hash;
1569 case R5_HASH:
1570 reiserfs_info(s, "Using r5 hash to sort names\n");
1571 return r5_hash;
1572 }
1573 return NULL;
1da177e4
LT		 1574}
1575
1576// this is used to set up correct value for old partitions
bd4c625c 1577static int function2code(hashf_t func)
1da177e4 1578{
bd4c625c
LT		 1579 if (func == keyed_hash)
1580 return TEA_HASH;
1581 if (func == yura_hash)
1582 return YURA_HASH;
1583 if (func == r5_hash)
1584 return R5_HASH;
1da177e4 1585
bd4c625c 1586 BUG(); // should never happen
1da177e4 1587
bd4c625c 1588 return 0;
1da177e4
LT		 1589}
1590
1591#define SWARN(silent, s, ...) \
1592 if (!(silent)) \
1593 reiserfs_warning (s, __VA_ARGS__)
1594
bd4c625c 1595static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1da177e4 1596{
bd4c625c 1597 struct inode *root_inode;
bd4c625c
LT		 1598 struct reiserfs_transaction_handle th;
1599 int old_format = 0;
1600 unsigned long blocks;
1601 unsigned int commit_max_age = 0;
1602 int jinit_done = 0;
1603 struct reiserfs_iget_args args;
1604 struct reiserfs_super_block *rs;
1605 char *jdev_name;
1606 struct reiserfs_sb_info *sbi;
1607 int errval = -EINVAL;
00b44197
JK		 1608 char *qf_names[MAXQUOTAS] = {};
1609 unsigned int qfmt = 0;
bd4c625c 1610
cdf6ccc8
MS		 1611 save_mount_options(s, data);
1612
01afb213 1613 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
bd4c625c
LT		 1614 if (!sbi) {
1615 errval = -ENOMEM;
1616 goto error;
1617 }
1618 s->s_fs_info = sbi;
bd4c625c
LT		 1619 /* Set default values for options: non-aggressive tails, RO on errors */
1620 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1621 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1622 /* no preallocation minimum, be smart in
1623 reiserfs_file_write instead */
1624 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1625 /* Preallocate by 16 blocks (17-1) at once */
1626 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
fe08a9d4 1627#ifdef CONFIG_REISERFS_FS_XATTR
bd4c625c
LT		 1628 /* Initialize the rwsem for xattr dir */
1629 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
fe08a9d4 1630#endif
bd4c625c
LT		 1631 /* setup default block allocator options */
1632 reiserfs_init_alloc_options(s);
1633
1634 jdev_name = NULL;
1635 if (reiserfs_parse_options
1636 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
00b44197 1637 &commit_max_age, qf_names, &qfmt) == 0) {
bd4c625c
LT		 1638 goto error;
1639 }
00b44197
JK		 1640#ifdef CONFIG_QUOTA
1641 handle_quota_files(s, qf_names, &qfmt);
1642#endif
bd4c625c
LT		 1643
1644 if (blocks) {
1645 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1646 "for remount only");
1647 goto error;
1648 }
1649
1650 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1651 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1652 old_format = 1;
1653 /* try new format (64-th 1k block), which can contain reiserfs super block */
1654 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1655 SWARN(silent, s,
1656 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1657 reiserfs_bdevname(s));
1658 goto error;
1659 }
1660
1661 rs = SB_DISK_SUPER_BLOCK(s);
1662 /* Let's do basic sanity check to verify that underlying device is not
1663 smaller than the filesystem. If the check fails then abort and scream,
1664 because bad stuff will happen otherwise. */
1665 if (s->s_bdev && s->s_bdev->bd_inode
1666 && i_size_read(s->s_bdev->bd_inode) <
1667 sb_block_count(rs) * sb_blocksize(rs)) {
1668 SWARN(silent, s,
1669 "Filesystem on %s cannot be mounted because it is bigger than the device",
1670 reiserfs_bdevname(s));
1671 SWARN(silent, s,
1672 "You may need to run fsck or increase size of your LVM partition");
1673 SWARN(silent, s,
1674 "Or may be you forgot to reboot after fdisk when it told you to");
1675 goto error;
1676 }
1677
1678 sbi->s_mount_state = SB_REISERFS_STATE(s);
1679 sbi->s_mount_state = REISERFS_VALID_FS;
1680
6f01046b 1681 if ((errval = reiserfs_init_bitmap_cache(s))) {
bd4c625c
LT		 1682 SWARN(silent, s,
1683 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1684 goto error;
1685 }
d2c89a42 1686 errval = -EINVAL;
1da177e4 1687#ifdef CONFIG_REISERFS_CHECK
bd4c625c
LT		 1688 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1689 SWARN(silent, s, "- it is slow mode for debugging.");
1da177e4
LT		 1690#endif
1691
bd4c625c
LT		 1692 /* make data=ordered the default */
1693 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1694 !reiserfs_data_writeback(s)) {
1695 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1696 }
1697
1698 if (reiserfs_data_log(s)) {
1699 reiserfs_info(s, "using journaled data mode\n");
1700 } else if (reiserfs_data_ordered(s)) {
1701 reiserfs_info(s, "using ordered data mode\n");
1702 } else {
1703 reiserfs_info(s, "using writeback data mode\n");
1704 }
1705 if (reiserfs_barrier_flush(s)) {
1706 printk("reiserfs: using flush barriers\n");
1707 }
1708 // set_device_ro(s->s_dev, 1) ;
1709 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1710 SWARN(silent, s,
1711 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1712 goto error;
1713 } else {
1714 jinit_done = 1; /* once this is set, journal_release must be called
1715 ** if we error out of the mount
1716 */
1717 }
1718 if (reread_meta_blocks(s)) {
1719 SWARN(silent, s,
1720 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1721 goto error;
1722 }
1723
1724 if (replay_only(s))
1725 goto error;
1726
1727 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1728 SWARN(silent, s,
1729 "clm-7000: Detected readonly device, marking FS readonly");
1730 s->s_flags |= MS_RDONLY;
1731 }
1732 args.objectid = REISERFS_ROOT_OBJECTID;
1733 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1734 root_inode =
1735 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1736 reiserfs_init_locked_inode, (void *)(&args));
1737 if (!root_inode) {
1738 SWARN(silent, s,
1739 "jmacd-10: reiserfs_fill_super: get root inode failed");
1740 goto error;
1741 }
1742
1743 if (root_inode->i_state & I_NEW) {
1744 reiserfs_read_locked_inode(root_inode, &args);
1745 unlock_new_inode(root_inode);
1746 }
1747
1748 s->s_root = d_alloc_root(root_inode);
1749 if (!s->s_root) {
1750 iput(root_inode);
1751 goto error;
1752 }
1753 // define and initialize hash function
1754 sbi->s_hash_function = hash_function(s);
1755 if (sbi->s_hash_function == NULL) {
1756 dput(s->s_root);
1757 s->s_root = NULL;
1758 goto error;
1759 }
1760
1761 if (is_reiserfs_3_5(rs)
1762 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1763 set_bit(REISERFS_3_5, &(sbi->s_properties));
e1fabd3c
JM		 1764 else if (old_format)
1765 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
bd4c625c
LT		 1766 else
1767 set_bit(REISERFS_3_6, &(sbi->s_properties));
1768
1769 if (!(s->s_flags & MS_RDONLY)) {
1770
1771 errval = journal_begin(&th, s, 1);
1772 if (errval) {
1773 dput(s->s_root);
1774 s->s_root = NULL;
1775 goto error;
1776 }
1777 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1778
1779 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1780 set_sb_fs_state(rs, 0);
1781
cb680c1b
JM		 1782 /* Clear out s_bmap_nr if it would wrap. We can handle this
1783 * case, but older revisions can't. This will cause the
1784 * file system to fail mount on those older implementations,
1785 * avoiding corruption. -jeffm */
1786 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1787 sb_bmap_nr(rs) != 0) {
1788 reiserfs_warning(s, "super-2030: This file system "
1789 "claims to use %u bitmap blocks in "
1790 "its super block, but requires %u. "
1791 "Clearing to zero.", sb_bmap_nr(rs),
1792 reiserfs_bmap_count(s));
1793
1794 set_sb_bmap_nr(rs, 0);
1795 }
1796
bd4c625c
LT		 1797 if (old_format_only(s)) {
1798 /* filesystem of format 3.5 either with standard or non-standard
1799 journal */
1800 if (convert_reiserfs(s)) {
1801 /* and -o conv is given */
1802 if (!silent)
1803 reiserfs_info(s,
1804 "converting 3.5 filesystem to the 3.6 format");
1805
1806 if (is_reiserfs_3_5(rs))
1807 /* put magic string of 3.6 format. 2.2 will not be able to
1808 mount this filesystem anymore */
1809 memcpy(rs->s_v1.s_magic,
1810 reiserfs_3_6_magic_string,
1811 sizeof
1812 (reiserfs_3_6_magic_string));
1813
1814 set_sb_version(rs, REISERFS_VERSION_2);
1815 reiserfs_convert_objectid_map_v1(s);
1816 set_bit(REISERFS_3_6, &(sbi->s_properties));
1817 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1818 } else if (!silent) {
1819 reiserfs_info(s, "using 3.5.x disk format\n");
1820 }
1821 }
1822
1823 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1824 errval = journal_end(&th, s, 1);
1825 if (errval) {
1826 dput(s->s_root);
1827 s->s_root = NULL;
1828 goto error;
1829 }
1830
1831 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1832 dput(s->s_root);
1833 s->s_root = NULL;
1834 goto error;
1835 }
1836
1837 /* look for files which were to be removed in previous session */
1838 finish_unfinished(s);
1839 } else {
1840 if (old_format_only(s) && !silent) {
1841 reiserfs_info(s, "using 3.5.x disk format\n");
1842 }
1843
1844 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1845 dput(s->s_root);
1846 s->s_root = NULL;
1847 goto error;
1848 }
1849 }
1850 // mark hash in super block: it could be unset. overwrite should be ok
1851 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1852
1853 handle_attrs(s);
1854
1855 reiserfs_proc_info_init(s);
1856
1857 init_waitqueue_head(&(sbi->s_wait));
1858 spin_lock_init(&sbi->bitmap_lock);
1859
1860 return (0);
1861
00b44197 1862error:
bd4c625c
LT		 1863 if (jinit_done) { /* kill the commit thread, free journal ram */
1864 journal_release_error(NULL, s);
1865 }
5065227b
JM		 1866
1867 reiserfs_free_bitmap_cache(s);
bd4c625c
LT		 1868 if (SB_BUFFER_WITH_SB(s))
1869 brelse(SB_BUFFER_WITH_SB(s));
1da177e4 1870#ifdef CONFIG_QUOTA
5065227b
JM		 1871 {
1872 int j;
00b44197
JK		 1873 for (j = 0; j < MAXQUOTAS; j++)
1874 kfree(qf_names[j]);
bd4c625c 1875 }
1da177e4 1876#endif
833d304b 1877 kfree(sbi);
1da177e4 1878
bd4c625c
LT		 1879 s->s_fs_info = NULL;
1880 return errval;
1da177e4
LT		 1881}
1882
726c3342 1883static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 1884{
726c3342 1885 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
bd4c625c
LT		 1886
1887 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1888 buf->f_bfree = sb_free_blocks(rs);
1889 buf->f_bavail = buf->f_bfree;
1890 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
726c3342 1891 buf->f_bsize = dentry->d_sb->s_blocksize;
bd4c625c
LT		 1892 /* changed to accommodate gcc folks. */
1893 buf->f_type = REISERFS_SUPER_MAGIC;
1894 return 0;
1da177e4
LT		 1895}
1896
1897#ifdef CONFIG_QUOTA
1898static int reiserfs_dquot_initialize(struct inode *inode, int type)
1899{
bd4c625c
LT		 1900 struct reiserfs_transaction_handle th;
1901 int ret, err;
1902
1903 /* We may create quota structure so we need to reserve enough blocks */
1904 reiserfs_write_lock(inode->i_sb);
1905 ret =
1906 journal_begin(&th, inode->i_sb,
1907 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1908 if (ret)
1909 goto out;
1910 ret = dquot_initialize(inode, type);
1911 err =
1912 journal_end(&th, inode->i_sb,
1913 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1914 if (!ret && err)
1915 ret = err;
1916 out:
1917 reiserfs_write_unlock(inode->i_sb);
1918 return ret;
1da177e4
LT		 1919}
1920
1921static int reiserfs_dquot_drop(struct inode *inode)
1922{
bd4c625c
LT		 1923 struct reiserfs_transaction_handle th;
1924 int ret, err;
1925
1926 /* We may delete quota structure so we need to reserve enough blocks */
1927 reiserfs_write_lock(inode->i_sb);
1928 ret =
1929 journal_begin(&th, inode->i_sb,
1930 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
a2fe594f
JK		 1931 if (ret) {
1932 /*
1933 * We call dquot_drop() anyway to at least release references
1934 * to quota structures so that umount does not hang.
1935 */
1936 dquot_drop(inode);
bd4c625c 1937 goto out;
a2fe594f 1938 }
bd4c625c
LT		 1939 ret = dquot_drop(inode);
1940 err =
1941 journal_end(&th, inode->i_sb,
1942 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1943 if (!ret && err)
1944 ret = err;
1945 out:
1946 reiserfs_write_unlock(inode->i_sb);
1947 return ret;
1da177e4
LT		 1948}
1949
1950static int reiserfs_write_dquot(struct dquot *dquot)
1951{
bd4c625c
LT		 1952 struct reiserfs_transaction_handle th;
1953 int ret, err;
1954
1955 reiserfs_write_lock(dquot->dq_sb);
1956 ret =
1957 journal_begin(&th, dquot->dq_sb,
1958 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1959 if (ret)
1960 goto out;
1961 ret = dquot_commit(dquot);
1962 err =
1963 journal_end(&th, dquot->dq_sb,
1964 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1965 if (!ret && err)
1966 ret = err;
1967 out:
1968 reiserfs_write_unlock(dquot->dq_sb);
1969 return ret;
1da177e4
LT		 1970}
1971
1972static int reiserfs_acquire_dquot(struct dquot *dquot)
1973{
bd4c625c
LT		 1974 struct reiserfs_transaction_handle th;
1975 int ret, err;
1976
1977 reiserfs_write_lock(dquot->dq_sb);
1978 ret =
1979 journal_begin(&th, dquot->dq_sb,
1980 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1981 if (ret)
1982 goto out;
1983 ret = dquot_acquire(dquot);
1984 err =
1985 journal_end(&th, dquot->dq_sb,
1986 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1987 if (!ret && err)
1988 ret = err;
1989 out:
1990 reiserfs_write_unlock(dquot->dq_sb);
1991 return ret;
1da177e4
LT		 1992}
1993
1994static int reiserfs_release_dquot(struct dquot *dquot)
1995{
bd4c625c
LT		 1996 struct reiserfs_transaction_handle th;
1997 int ret, err;
1998
1999 reiserfs_write_lock(dquot->dq_sb);
2000 ret =
2001 journal_begin(&th, dquot->dq_sb,
2002 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
9c3013e9
JK		 2003 if (ret) {
2004 /* Release dquot anyway to avoid endless cycle in dqput() */
2005 dquot_release(dquot);
bd4c625c 2006 goto out;
9c3013e9 2007 }
bd4c625c
LT		 2008 ret = dquot_release(dquot);
2009 err =
2010 journal_end(&th, dquot->dq_sb,
2011 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2012 if (!ret && err)
2013 ret = err;
2014 out:
2015 reiserfs_write_unlock(dquot->dq_sb);
2016 return ret;
1da177e4
LT		 2017}
2018
2019static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2020{
4506567b 2021 /* Are we journaling quotas? */
bd4c625c
LT		 2022 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2023 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2024 dquot_mark_dquot_dirty(dquot);
2025 return reiserfs_write_dquot(dquot);
2026 } else
2027 return dquot_mark_dquot_dirty(dquot);
1da177e4
LT		 2028}
2029
2030static int reiserfs_write_info(struct super_block *sb, int type)
2031{
bd4c625c
LT		 2032 struct reiserfs_transaction_handle th;
2033 int ret, err;
2034
2035 /* Data block + inode block */
2036 reiserfs_write_lock(sb);
2037 ret = journal_begin(&th, sb, 2);
2038 if (ret)
2039 goto out;
2040 ret = dquot_commit_info(sb, type);
2041 err = journal_end(&th, sb, 2);
2042 if (!ret && err)
2043 ret = err;
2044 out:
2045 reiserfs_write_unlock(sb);
2046 return ret;
1da177e4
LT		 2047}
2048
2049/*
84de856e 2050 * Turn on quotas during mount time - we need to find the quota file and such...
1da177e4
LT		 2051 */
2052static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2053{
84de856e 2054 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
bd4c625c 2055 REISERFS_SB(sb)->s_jquota_fmt, type);
1da177e4
LT		 2056}
2057
2058/*
2059 * Standard function to be called on quota_on
2060 */
bd4c625c 2061static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
1b445a9c 2062 char *path, int remount)
1da177e4 2063{
bd4c625c
LT		 2064 int err;
2065 struct nameidata nd;
d5dee5c3 2066 struct inode *inode;
5d4f7fdd 2067 struct reiserfs_transaction_handle th;
bd4c625c
LT		 2068
2069 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2070 return -EINVAL;
1b445a9c
JK		 2071 /* No more checks needed? Path and format_id are bogus anyway... */
2072 if (remount)
2073 return vfs_quota_on(sb, type, format_id, path, 1);
bd4c625c
LT		 2074 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
2075 if (err)
2076 return err;
2077 /* Quotafile not on the same filesystem? */
4ac91378 2078 if (nd.path.mnt->mnt_sb != sb) {
1d957f9b 2079 path_put(&nd.path);
bd4c625c
LT		 2080 return -EXDEV;
2081 }
d5dee5c3 2082 inode = nd.path.dentry->d_inode;
bd4c625c 2083 /* We must not pack tails for quota files on reiserfs for quota IO to work */
d5dee5c3
JK		 2084 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2085 err = reiserfs_unpack(inode, NULL);
2086 if (err) {
2087 reiserfs_warning(sb,
2088 "reiserfs: Unpacking tail of quota file failed"
2089 " (%d). Cannot turn on quotas.", err);
2090 path_put(&nd.path);
2091 return -EINVAL;
2092 }
2093 mark_inode_dirty(inode);
bd4c625c 2094 }
5d4f7fdd
JK		 2095 /* Journaling quota? */
2096 if (REISERFS_SB(sb)->s_qf_names[type]) {
2097 /* Quotafile not of fs root? */
2098 if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
2099 reiserfs_warning(sb,
bd4c625c
LT		 2100 "reiserfs: Quota file not on filesystem root. "
2101 "Journalled quota will not work.");
5d4f7fdd
JK		 2102 }
2103
2104 /*
2105 * When we journal data on quota file, we have to flush journal to see
2106 * all updates to the file when we bypass pagecache...
2107 */
2108 if (reiserfs_file_data_log(inode)) {
2109 /* Just start temporary transaction and finish it */
2110 err = journal_begin(&th, sb, 1);
2111 if (err)
2112 return err;
2113 err = journal_end_sync(&th, sb, 1);
2114 if (err)
2115 return err;
2116 }
1d957f9b 2117 path_put(&nd.path);
1b445a9c 2118 return vfs_quota_on(sb, type, format_id, path, 0);
1da177e4
LT		 2119}
2120
2121/* Read data from quotafile - avoid pagecache and such because we cannot afford
2122 * acquiring the locks... As quota files are never truncated and quota code
2123 * itself serializes the operations (and noone else should touch the files)
2124 * we don't have to be afraid of races */
2125static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2126 size_t len, loff_t off)
2127{
bd4c625c
LT		 2128 struct inode *inode = sb_dqopt(sb)->files[type];
2129 unsigned long blk = off >> sb->s_blocksize_bits;
2130 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2131 size_t toread;
2132 struct buffer_head tmp_bh, *bh;
2133 loff_t i_size = i_size_read(inode);
2134
2135 if (off > i_size)
2136 return 0;
2137 if (off + len > i_size)
2138 len = i_size - off;
2139 toread = len;
2140 while (toread > 0) {
2141 tocopy =
2142 sb->s_blocksize - offset <
2143 toread ? sb->s_blocksize - offset : toread;
2144 tmp_bh.b_state = 0;
2145 /* Quota files are without tails so we can safely use this function */
2146 reiserfs_write_lock(sb);
2147 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2148 reiserfs_write_unlock(sb);
2149 if (err)
2150 return err;
2151 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2152 memset(data, 0, tocopy);
2153 else {
2154 bh = sb_bread(sb, tmp_bh.b_blocknr);
2155 if (!bh)
2156 return -EIO;
2157 memcpy(data, bh->b_data + offset, tocopy);
2158 brelse(bh);
2159 }
2160 offset = 0;
2161 toread -= tocopy;
2162 data += tocopy;
2163 blk++;
2164 }
2165 return len;
1da177e4
LT		 2166}
2167
2168/* Write to quotafile (we know the transaction is already started and has
2169 * enough credits) */
2170static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2171 const char *data, size_t len, loff_t off)
2172{
bd4c625c
LT		 2173 struct inode *inode = sb_dqopt(sb)->files[type];
2174 unsigned long blk = off >> sb->s_blocksize_bits;
2175 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2176 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2177 size_t towrite = len;
2178 struct buffer_head tmp_bh, *bh;
2179
9c3013e9
JK		 2180 if (!current->journal_info) {
2181 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2182 " cancelled because transaction is not started.\n",
2183 (unsigned long long)off, (unsigned long long)len);
2184 return -EIO;
2185 }
5c81a419 2186 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
bd4c625c
LT		 2187 while (towrite > 0) {
2188 tocopy = sb->s_blocksize - offset < towrite ?
2189 sb->s_blocksize - offset : towrite;
2190 tmp_bh.b_state = 0;
2191 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2192 if (err)
2193 goto out;
2194 if (offset || tocopy != sb->s_blocksize)
2195 bh = sb_bread(sb, tmp_bh.b_blocknr);
2196 else
2197 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2198 if (!bh) {
2199 err = -EIO;
2200 goto out;
2201 }
2202 lock_buffer(bh);
2203 memcpy(bh->b_data + offset, data, tocopy);
2204 flush_dcache_page(bh->b_page);
2205 set_buffer_uptodate(bh);
2206 unlock_buffer(bh);
2207 reiserfs_prepare_for_journal(sb, bh, 1);
2208 journal_mark_dirty(current->journal_info, sb, bh);
2209 if (!journal_quota)
2210 reiserfs_add_ordered_list(inode, bh);
2211 brelse(bh);
2212 offset = 0;
2213 towrite -= tocopy;
2214 data += tocopy;
2215 blk++;
2216 }
9c3013e9 2217out:
10dd08dc
JK		 2218 if (len == towrite) {
2219 mutex_unlock(&inode->i_mutex);
bd4c625c 2220 return err;
10dd08dc 2221 }
bd4c625c
LT		 2222 if (inode->i_size < off + len - towrite)
2223 i_size_write(inode, off + len - towrite);
2224 inode->i_version++;
2225 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2226 mark_inode_dirty(inode);
1b1dcc1b 2227 mutex_unlock(&inode->i_mutex);
bd4c625c 2228 return len - towrite;
1da177e4
LT		 2229}
2230
2231#endif
2232
454e2398
DH		 2233static int get_super_block(struct file_system_type *fs_type,
2234 int flags, const char *dev_name,
2235 void *data, struct vfsmount *mnt)
1da177e4 2236{
454e2398
DH		 2237 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2238 mnt);
1da177e4
LT		 2239}
2240
bd4c625c 2241static int __init init_reiserfs_fs(void)
1da177e4
LT		 2242{
2243 int ret;
2244
bd4c625c 2245 if ((ret = init_inodecache())) {
1da177e4
LT		 2246 return ret;
2247 }
2248
bd4c625c
LT		 2249 if ((ret = reiserfs_xattr_register_handlers()))
2250 goto failed_reiserfs_xattr_register_handlers;
1da177e4 2251
bd4c625c
LT		 2252 reiserfs_proc_info_global_init();
2253 reiserfs_proc_register_global("version",
2254 reiserfs_global_version_in_proc);
1da177e4 2255
bd4c625c 2256 ret = register_filesystem(&reiserfs_fs_type);
1da177e4
LT		 2257
2258 if (ret == 0) {
2259 return 0;
2260 }
2261
bd4c625c 2262 reiserfs_xattr_unregister_handlers();
1da177e4 2263
bd4c625c
LT		 2264 failed_reiserfs_xattr_register_handlers:
2265 reiserfs_proc_unregister_global("version");
2266 reiserfs_proc_info_global_done();
2267 destroy_inodecache();
1da177e4
LT		 2268
2269 return ret;
2270}
2271
bd4c625c 2272static void __exit exit_reiserfs_fs(void)
1da177e4 2273{
bd4c625c
LT		 2274 reiserfs_xattr_unregister_handlers();
2275 reiserfs_proc_unregister_global("version");
2276 reiserfs_proc_info_global_done();
2277 unregister_filesystem(&reiserfs_fs_type);
2278 destroy_inodecache();
1da177e4
LT		 2279}
2280
2281struct file_system_type reiserfs_fs_type = {
bd4c625c
LT		 2282 .owner = THIS_MODULE,
2283 .name = "reiserfs",
2284 .get_sb = get_super_block,
edc666e2 2285 .kill_sb = reiserfs_kill_sb,
bd4c625c 2286 .fs_flags = FS_REQUIRES_DEV,
1da177e4
LT		 2287};
2288
bd4c625c
LT		 2289MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2290MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2291MODULE_LICENSE("GPL");
1da177e4 2292
bd4c625c
LT		 2293module_init(init_reiserfs_fs);
2294module_exit(exit_reiserfs_fs);
Linux kernel - Deliverables
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