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slab allocators: Remove SLAB_DEBUG_INITIAL flag
[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>
21#include <linux/smp_lock.h>
22#include <linux/init.h>
23#include <linux/blkdev.h>
24#include <linux/buffer_head.h>
25#include <linux/vfs.h>
6b3286ed 26#include <linux/mnt_namespace.h>
1da177e4
LT		 27#include <linux/mount.h>
28#include <linux/namei.h>
29#include <linux/quotaops.h>
30
31struct file_system_type reiserfs_fs_type;
32
33static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
34static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
35static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
36
bd4c625c 37int is_reiserfs_3_5(struct reiserfs_super_block *rs)
1da177e4 38{
bd4c625c
LT		 39 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
40 strlen(reiserfs_3_5_magic_string));
1da177e4
LT		 41}
42
bd4c625c 43int is_reiserfs_3_6(struct reiserfs_super_block *rs)
1da177e4 44{
bd4c625c
LT		 45 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
46 strlen(reiserfs_3_6_magic_string));
1da177e4
LT		 47}
48
bd4c625c 49int is_reiserfs_jr(struct reiserfs_super_block *rs)
1da177e4 50{
bd4c625c
LT		 51 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
52 strlen(reiserfs_jr_magic_string));
1da177e4
LT		 53}
54
bd4c625c 55static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
1da177e4 56{
bd4c625c
LT		 57 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
58 is_reiserfs_jr(rs));
1da177e4
LT		 59}
60
bd4c625c 61static int reiserfs_remount(struct super_block *s, int *flags, char *data);
726c3342 62static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
1da177e4 63
bd4c625c 64static int reiserfs_sync_fs(struct super_block *s, int wait)
1da177e4 65{
bd4c625c
LT		 66 if (!(s->s_flags & MS_RDONLY)) {
67 struct reiserfs_transaction_handle th;
68 reiserfs_write_lock(s);
69 if (!journal_begin(&th, s, 1))
70 if (!journal_end_sync(&th, s, 1))
71 reiserfs_flush_old_commits(s);
72 s->s_dirt = 0; /* Even if it's not true.
73 * We'll loop forever in sync_supers otherwise */
74 reiserfs_write_unlock(s);
75 } else {
76 s->s_dirt = 0;
77 }
78 return 0;
1da177e4
LT		 79}
80
81static void reiserfs_write_super(struct super_block *s)
82{
bd4c625c 83 reiserfs_sync_fs(s, 1);
1da177e4
LT		 84}
85
bd4c625c 86static void reiserfs_write_super_lockfs(struct super_block *s)
1da177e4 87{
bd4c625c
LT		 88 struct reiserfs_transaction_handle th;
89 reiserfs_write_lock(s);
90 if (!(s->s_flags & MS_RDONLY)) {
91 int err = journal_begin(&th, s, 1);
92 if (err) {
93 reiserfs_block_writes(&th);
94 } else {
95 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
96 1);
97 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
98 reiserfs_block_writes(&th);
99 journal_end_sync(&th, s, 1);
100 }
101 }
102 s->s_dirt = 0;
103 reiserfs_write_unlock(s);
1da177e4
LT		 104}
105
bd4c625c
LT		 106static void reiserfs_unlockfs(struct super_block *s)
107{
108 reiserfs_allow_writes(s);
1da177e4
LT		 109}
110
bd4c625c 111extern const struct in_core_key MAX_IN_CORE_KEY;
1da177e4
LT		 112
113/* this is used to delete "save link" when there are no items of a
114 file it points to. It can either happen if unlink is completed but
115 "save unlink" removal, or if file has both unlink and truncate
116 pending and as unlink completes first (because key of "save link"
117 protecting unlink is bigger that a key lf "save link" which
118 protects truncate), so there left no items to make truncate
119 completion on */
bd4c625c
LT		 120static int remove_save_link_only(struct super_block *s,
121 struct reiserfs_key *key, int oid_free)
1da177e4 122{
bd4c625c
LT		 123 struct reiserfs_transaction_handle th;
124 int err;
125
126 /* we are going to do one balancing */
127 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
128 if (err)
129 return err;
130
131 reiserfs_delete_solid_item(&th, NULL, key);
132 if (oid_free)
133 /* removals are protected by direct items */
134 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
135
136 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
1da177e4 137}
bd4c625c 138
1da177e4
LT		 139#ifdef CONFIG_QUOTA
140static int reiserfs_quota_on_mount(struct super_block *, int);
141#endif
bd4c625c 142
1da177e4 143/* look for uncompleted unlinks and truncates and complete them */
bd4c625c 144static int finish_unfinished(struct super_block *s)
1da177e4 145{
bd4c625c
LT		 146 INITIALIZE_PATH(path);
147 struct cpu_key max_cpu_key, obj_key;
148 struct reiserfs_key save_link_key;
149 int retval = 0;
150 struct item_head *ih;
151 struct buffer_head *bh;
152 int item_pos;
153 char *item;
154 int done;
155 struct inode *inode;
156 int truncate;
1da177e4 157#ifdef CONFIG_QUOTA
bd4c625c
LT		 158 int i;
159 int ms_active_set;
1da177e4 160#endif
bd4c625c
LT		 161
162 /* compose key to look for "save" links */
163 max_cpu_key.version = KEY_FORMAT_3_5;
164 max_cpu_key.on_disk_key.k_dir_id = ~0U;
165 max_cpu_key.on_disk_key.k_objectid = ~0U;
166 set_cpu_key_k_offset(&max_cpu_key, ~0U);
167 max_cpu_key.key_length = 3;
1da177e4
LT		 168
169#ifdef CONFIG_QUOTA
bd4c625c
LT		 170 /* Needed for iput() to work correctly and not trash data */
171 if (s->s_flags & MS_ACTIVE) {
172 ms_active_set = 0;
173 } else {
174 ms_active_set = 1;
175 s->s_flags |= MS_ACTIVE;
176 }
177 /* Turn on quotas so that they are updated correctly */
178 for (i = 0; i < MAXQUOTAS; i++) {
179 if (REISERFS_SB(s)->s_qf_names[i]) {
180 int ret = reiserfs_quota_on_mount(s, i);
181 if (ret < 0)
182 reiserfs_warning(s,
183 "reiserfs: cannot turn on journalled quota: error %d",
184 ret);
185 }
186 }
1da177e4 187#endif
bd4c625c
LT		 188
189 done = 0;
190 REISERFS_SB(s)->s_is_unlinked_ok = 1;
191 while (!retval) {
192 retval = search_item(s, &max_cpu_key, &path);
193 if (retval != ITEM_NOT_FOUND) {
194 reiserfs_warning(s,
195 "vs-2140: finish_unfinished: search_by_key returned %d",
196 retval);
197 break;
198 }
199
200 bh = get_last_bh(&path);
201 item_pos = get_item_pos(&path);
202 if (item_pos != B_NR_ITEMS(bh)) {
203 reiserfs_warning(s,
204 "vs-2060: finish_unfinished: wrong position found");
205 break;
206 }
207 item_pos--;
208 ih = B_N_PITEM_HEAD(bh, item_pos);
209
210 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
211 /* there are no "save" links anymore */
212 break;
213
214 save_link_key = ih->ih_key;
215 if (is_indirect_le_ih(ih))
216 truncate = 1;
217 else
218 truncate = 0;
219
220 /* reiserfs_iget needs k_dirid and k_objectid only */
221 item = B_I_PITEM(bh, ih);
222 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
223 obj_key.on_disk_key.k_objectid =
224 le32_to_cpu(ih->ih_key.k_objectid);
225 obj_key.on_disk_key.k_offset = 0;
226 obj_key.on_disk_key.k_type = 0;
227
228 pathrelse(&path);
229
230 inode = reiserfs_iget(s, &obj_key);
231 if (!inode) {
232 /* the unlink almost completed, it just did not manage to remove
233 "save" link and release objectid */
234 reiserfs_warning(s,
235 "vs-2180: finish_unfinished: iget failed for %K",
236 &obj_key);
237 retval = remove_save_link_only(s, &save_link_key, 1);
238 continue;
239 }
240
241 if (!truncate && inode->i_nlink) {
242 /* file is not unlinked */
243 reiserfs_warning(s,
244 "vs-2185: finish_unfinished: file %K is not unlinked",
245 &obj_key);
246 retval = remove_save_link_only(s, &save_link_key, 0);
247 continue;
248 }
249 DQUOT_INIT(inode);
250
251 if (truncate && S_ISDIR(inode->i_mode)) {
252 /* We got a truncate request for a dir which is impossible.
253 The only imaginable way is to execute unfinished truncate request
254 then boot into old kernel, remove the file and create dir with
255 the same key. */
256 reiserfs_warning(s,
257 "green-2101: impossible truncate on a directory %k. Please report",
258 INODE_PKEY(inode));
259 retval = remove_save_link_only(s, &save_link_key, 0);
260 truncate = 0;
261 iput(inode);
262 continue;
263 }
264
265 if (truncate) {
266 REISERFS_I(inode)->i_flags |=
267 i_link_saved_truncate_mask;
268 /* not completed truncate found. New size was committed together
269 with "save" link */
270 reiserfs_info(s, "Truncating %k to %Ld ..",
271 INODE_PKEY(inode), inode->i_size);
272 reiserfs_truncate_file(inode,
273 0
274 /*don't update modification time */
275 );
276 retval = remove_save_link(inode, truncate);
277 } else {
278 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
279 /* not completed unlink (rmdir) found */
280 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
281 /* removal gets completed in iput */
282 retval = 0;
283 }
284
285 iput(inode);
286 printk("done\n");
287 done++;
288 }
289 REISERFS_SB(s)->s_is_unlinked_ok = 0;
290
1da177e4 291#ifdef CONFIG_QUOTA
bd4c625c
LT		 292 /* Turn quotas off */
293 for (i = 0; i < MAXQUOTAS; i++) {
294 if (sb_dqopt(s)->files[i])
295 vfs_quota_off_mount(s, i);
296 }
297 if (ms_active_set)
298 /* Restore the flag back */
299 s->s_flags &= ~MS_ACTIVE;
1da177e4 300#endif
bd4c625c
LT		 301 pathrelse(&path);
302 if (done)
303 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
304 "Completed\n", done);
305 return retval;
1da177e4 306}
bd4c625c 307
1da177e4
LT		 308/* to protect file being unlinked from getting lost we "safe" link files
309 being unlinked. This link will be deleted in the same transaction with last
310 item of file. mounting the filesytem we scan all these links and remove
311 files which almost got lost */
bd4c625c
LT		 312void add_save_link(struct reiserfs_transaction_handle *th,
313 struct inode *inode, int truncate)
1da177e4 314{
bd4c625c
LT		 315 INITIALIZE_PATH(path);
316 int retval;
317 struct cpu_key key;
318 struct item_head ih;
319 __le32 link;
320
321 BUG_ON(!th->t_trans_id);
322
323 /* file can only get one "save link" of each kind */
324 RFALSE(truncate &&
325 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
326 "saved link already exists for truncated inode %lx",
327 (long)inode->i_ino);
328 RFALSE(!truncate &&
329 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
330 "saved link already exists for unlinked inode %lx",
331 (long)inode->i_ino);
332
333 /* setup key of "save" link */
334 key.version = KEY_FORMAT_3_5;
335 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
336 key.on_disk_key.k_objectid = inode->i_ino;
337 if (!truncate) {
338 /* unlink, rmdir, rename */
339 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
340 set_cpu_key_k_type(&key, TYPE_DIRECT);
341
342 /* item head of "safe" link */
343 make_le_item_head(&ih, &key, key.version,
344 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
345 4 /*length */ , 0xffff /*free space */ );
346 } else {
347 /* truncate */
348 if (S_ISDIR(inode->i_mode))
349 reiserfs_warning(inode->i_sb,
350 "green-2102: Adding a truncate savelink for a directory %k! Please report",
351 INODE_PKEY(inode));
352 set_cpu_key_k_offset(&key, 1);
353 set_cpu_key_k_type(&key, TYPE_INDIRECT);
354
355 /* item head of "safe" link */
356 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
357 4 /*length */ , 0 /*free space */ );
358 }
359 key.key_length = 3;
360
361 /* look for its place in the tree */
362 retval = search_item(inode->i_sb, &key, &path);
363 if (retval != ITEM_NOT_FOUND) {
364 if (retval != -ENOSPC)
365 reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:"
366 "search_by_key (%K) returned %d", &key,
367 retval);
368 pathrelse(&path);
369 return;
370 }
1da177e4 371
bd4c625c
LT		 372 /* body of "save" link */
373 link = INODE_PKEY(inode)->k_dir_id;
374
375 /* put "save" link inot tree, don't charge quota to anyone */
376 retval =
377 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
378 if (retval) {
379 if (retval != -ENOSPC)
380 reiserfs_warning(inode->i_sb,
381 "vs-2120: add_save_link: insert_item returned %d",
382 retval);
383 } else {
384 if (truncate)
385 REISERFS_I(inode)->i_flags |=
386 i_link_saved_truncate_mask;
387 else
388 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
389 }
390}
1da177e4
LT		 391
392/* this opens transaction unlike add_save_link */
bd4c625c 393int remove_save_link(struct inode *inode, int truncate)
1da177e4 394{
bd4c625c
LT		 395 struct reiserfs_transaction_handle th;
396 struct reiserfs_key key;
397 int err;
398
399 /* we are going to do one balancing only */
400 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
401 if (err)
402 return err;
403
404 /* setup key of "save" link */
405 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
406 key.k_objectid = INODE_PKEY(inode)->k_objectid;
407 if (!truncate) {
408 /* unlink, rmdir, rename */
409 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
410 1 + inode->i_sb->s_blocksize);
411 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
412 } else {
413 /* truncate */
414 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
415 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
416 }
1da177e4 417
bd4c625c
LT		 418 if ((truncate &&
419 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
420 (!truncate &&
421 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
422 /* don't take quota bytes from anywhere */
423 reiserfs_delete_solid_item(&th, NULL, &key);
424 if (!truncate) {
425 reiserfs_release_objectid(&th, inode->i_ino);
426 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
427 } else
428 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
429
430 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
431}
1da177e4 432
edc666e2 433static void reiserfs_kill_sb(struct super_block *s)
1da177e4 434{
edc666e2
DH		 435 if (REISERFS_SB(s)) {
436 if (REISERFS_SB(s)->xattr_root) {
437 d_invalidate(REISERFS_SB(s)->xattr_root);
438 dput(REISERFS_SB(s)->xattr_root);
439 REISERFS_SB(s)->xattr_root = NULL;
440 }
bd4c625c 441
edc666e2
DH		 442 if (REISERFS_SB(s)->priv_root) {
443 d_invalidate(REISERFS_SB(s)->priv_root);
444 dput(REISERFS_SB(s)->priv_root);
445 REISERFS_SB(s)->priv_root = NULL;
446 }
bd4c625c
LT		 447 }
448
edc666e2
DH		 449 kill_block_super(s);
450}
451
452static void reiserfs_put_super(struct super_block *s)
453{
454 struct reiserfs_transaction_handle th;
455 th.t_trans_id = 0;
bd4c625c
LT		 456
457 /* change file system state to current state if it was mounted with read-write permissions */
458 if (!(s->s_flags & MS_RDONLY)) {
459 if (!journal_begin(&th, s, 10)) {
460 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
461 1);
462 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
463 REISERFS_SB(s)->s_mount_state);
464 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
465 }
466 }
467
468 /* note, journal_release checks for readonly mount, and can decide not
469 ** to do a journal_end
470 */
471 journal_release(&th, s);
472
5065227b 473 reiserfs_free_bitmap_cache(s);
bd4c625c
LT		 474
475 brelse(SB_BUFFER_WITH_SB(s));
476
477 print_statistics(s);
478
bd4c625c
LT		 479 if (REISERFS_SB(s)->reserved_blocks != 0) {
480 reiserfs_warning(s,
481 "green-2005: reiserfs_put_super: reserved blocks left %d",
482 REISERFS_SB(s)->reserved_blocks);
483 }
484
485 reiserfs_proc_info_done(s);
486
487 kfree(s->s_fs_info);
488 s->s_fs_info = NULL;
489
490 return;
1da177e4
LT		 491}
492
e18b890b 493static struct kmem_cache *reiserfs_inode_cachep;
1da177e4
LT		 494
495static struct inode *reiserfs_alloc_inode(struct super_block *sb)
496{
497 struct reiserfs_inode_info *ei;
bd4c625c 498 ei = (struct reiserfs_inode_info *)
e94b1766 499 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 500 if (!ei)
501 return NULL;
502 return &ei->vfs_inode;
503}
504
505static void reiserfs_destroy_inode(struct inode *inode)
506{
507 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
508}
509
e18b890b 510static void init_once(void *foo, struct kmem_cache * cachep, unsigned long flags)
1da177e4 511{
bd4c625c 512 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
1da177e4 513
50953fe9 514 if (flags & SLAB_CTOR_CONSTRUCTOR) {
bd4c625c 515 INIT_LIST_HEAD(&ei->i_prealloc_list);
1da177e4 516 inode_init_once(&ei->vfs_inode);
cfe14677 517#ifdef CONFIG_REISERFS_FS_POSIX_ACL
1da177e4
LT		 518 ei->i_acl_access = NULL;
519 ei->i_acl_default = NULL;
cfe14677 520#endif
1da177e4
LT		 521 }
522}
bd4c625c 523
1da177e4
LT		 524static int init_inodecache(void)
525{
526 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
bd4c625c
LT		 527 sizeof(struct
528 reiserfs_inode_info),
fffb60f9
PJ		 529 0, (SLAB_RECLAIM_ACCOUNT|
530 SLAB_MEM_SPREAD),
bd4c625c 531 init_once, NULL);
1da177e4
LT		 532 if (reiserfs_inode_cachep == NULL)
533 return -ENOMEM;
534 return 0;
535}
536
537static void destroy_inodecache(void)
538{
1a1d92c1 539 kmem_cache_destroy(reiserfs_inode_cachep);
1da177e4
LT		 540}
541
542/* we don't mark inodes dirty, we just log them */
bd4c625c
LT		 543static void reiserfs_dirty_inode(struct inode *inode)
544{
545 struct reiserfs_transaction_handle th;
546
547 int err = 0;
548 if (inode->i_sb->s_flags & MS_RDONLY) {
549 reiserfs_warning(inode->i_sb,
550 "clm-6006: writing inode %lu on readonly FS",
551 inode->i_ino);
552 return;
553 }
554 reiserfs_write_lock(inode->i_sb);
555
556 /* this is really only used for atime updates, so they don't have
557 ** to be included in O_SYNC or fsync
558 */
559 err = journal_begin(&th, inode->i_sb, 1);
560 if (err) {
561 reiserfs_write_unlock(inode->i_sb);
562 return;
563 }
564 reiserfs_update_sd(&th, inode);
565 journal_end(&th, inode->i_sb, 1);
566 reiserfs_write_unlock(inode->i_sb);
1da177e4
LT		 567}
568
cfe14677 569#ifdef CONFIG_REISERFS_FS_POSIX_ACL
bd4c625c 570static void reiserfs_clear_inode(struct inode *inode)
1da177e4 571{
bd4c625c 572 struct posix_acl *acl;
1da177e4 573
bd4c625c
LT		 574 acl = REISERFS_I(inode)->i_acl_access;
575 if (acl && !IS_ERR(acl))
576 posix_acl_release(acl);
577 REISERFS_I(inode)->i_acl_access = NULL;
1da177e4 578
bd4c625c
LT		 579 acl = REISERFS_I(inode)->i_acl_default;
580 if (acl && !IS_ERR(acl))
581 posix_acl_release(acl);
582 REISERFS_I(inode)->i_acl_default = NULL;
1da177e4 583}
cfe14677
AD		 584#else
585#define reiserfs_clear_inode NULL
586#endif
1da177e4
LT		 587
588#ifdef CONFIG_QUOTA
bd4c625c
LT		 589static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
590 size_t, loff_t);
591static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
592 loff_t);
1da177e4
LT		 593#endif
594
ee9b6d61 595static const struct super_operations reiserfs_sops = {
bd4c625c
LT		 596 .alloc_inode = reiserfs_alloc_inode,
597 .destroy_inode = reiserfs_destroy_inode,
598 .write_inode = reiserfs_write_inode,
599 .dirty_inode = reiserfs_dirty_inode,
600 .delete_inode = reiserfs_delete_inode,
601 .clear_inode = reiserfs_clear_inode,
602 .put_super = reiserfs_put_super,
603 .write_super = reiserfs_write_super,
604 .sync_fs = reiserfs_sync_fs,
605 .write_super_lockfs = reiserfs_write_super_lockfs,
606 .unlockfs = reiserfs_unlockfs,
607 .statfs = reiserfs_statfs,
608 .remount_fs = reiserfs_remount,
1da177e4 609#ifdef CONFIG_QUOTA
bd4c625c
LT		 610 .quota_read = reiserfs_quota_read,
611 .quota_write = reiserfs_quota_write,
1da177e4
LT		 612#endif
613};
614
615#ifdef CONFIG_QUOTA
616#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
617
618static int reiserfs_dquot_initialize(struct inode *, int);
619static int reiserfs_dquot_drop(struct inode *);
620static int reiserfs_write_dquot(struct dquot *);
621static int reiserfs_acquire_dquot(struct dquot *);
622static int reiserfs_release_dquot(struct dquot *);
623static int reiserfs_mark_dquot_dirty(struct dquot *);
624static int reiserfs_write_info(struct super_block *, int);
625static int reiserfs_quota_on(struct super_block *, int, int, char *);
626
bd4c625c
LT		 627static struct dquot_operations reiserfs_quota_operations = {
628 .initialize = reiserfs_dquot_initialize,
629 .drop = reiserfs_dquot_drop,
630 .alloc_space = dquot_alloc_space,
631 .alloc_inode = dquot_alloc_inode,
632 .free_space = dquot_free_space,
633 .free_inode = dquot_free_inode,
634 .transfer = dquot_transfer,
635 .write_dquot = reiserfs_write_dquot,
636 .acquire_dquot = reiserfs_acquire_dquot,
637 .release_dquot = reiserfs_release_dquot,
638 .mark_dirty = reiserfs_mark_dquot_dirty,
639 .write_info = reiserfs_write_info,
1da177e4
LT		 640};
641
bd4c625c
LT		 642static struct quotactl_ops reiserfs_qctl_operations = {
643 .quota_on = reiserfs_quota_on,
644 .quota_off = vfs_quota_off,
645 .quota_sync = vfs_quota_sync,
646 .get_info = vfs_get_dqinfo,
647 .set_info = vfs_set_dqinfo,
648 .get_dqblk = vfs_get_dqblk,
649 .set_dqblk = vfs_set_dqblk,
1da177e4
LT		 650};
651#endif
652
653static struct export_operations reiserfs_export_ops = {
bd4c625c
LT		 654 .encode_fh = reiserfs_encode_fh,
655 .decode_fh = reiserfs_decode_fh,
656 .get_parent = reiserfs_get_parent,
657 .get_dentry = reiserfs_get_dentry,
658};
1da177e4
LT		 659
660/* this struct is used in reiserfs_getopt () for containing the value for those
661 mount options that have values rather than being toggles. */
662typedef struct {
bd4c625c
LT		 663 char *value;
664 int setmask; /* bitmask which is to set on mount_options bitmask when this
665 value is found, 0 is no bits are to be changed. */
666 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
667 value is found, 0 is no bits are to be changed. This is
668 applied BEFORE setmask */
1da177e4
LT		 669} arg_desc_t;
670
671/* Set this bit in arg_required to allow empty arguments */
672#define REISERFS_OPT_ALLOWEMPTY 31
673
674/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
675 mount options */
676typedef struct {
bd4c625c
LT		 677 char *option_name;
678 int arg_required; /* 0 if argument is not required, not 0 otherwise */
679 const arg_desc_t *values; /* list of values accepted by an option */
680 int setmask; /* bitmask which is to set on mount_options bitmask when this
681 value is found, 0 is no bits are to be changed. */
682 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
683 value is found, 0 is no bits are to be changed. This is
684 applied BEFORE setmask */
1da177e4
LT		 685} opt_desc_t;
686
687/* possible values for -o data= */
688static const arg_desc_t logging_mode[] = {
bd4c625c
LT		 689 {"ordered", 1 << REISERFS_DATA_ORDERED,
690 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
691 {"journal", 1 << REISERFS_DATA_LOG,
692 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
693 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
694 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
cd02b966 695 {.value = NULL}
1da177e4
LT		 696};
697
698/* possible values for -o barrier= */
699static const arg_desc_t barrier_mode[] = {
bd4c625c
LT		 700 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
701 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
cd02b966 702 {.value = NULL}
1da177e4
LT		 703};
704
705/* possible values for "-o block-allocator=" and bits which are to be set in
706 s_mount_opt of reiserfs specific part of in-core super block */
707static const arg_desc_t balloc[] = {
bd4c625c
LT		 708 {"noborder", 1 << REISERFS_NO_BORDER, 0},
709 {"border", 0, 1 << REISERFS_NO_BORDER},
710 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
711 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
712 {"test4", 1 << REISERFS_TEST4, 0},
713 {"notest4", 0, 1 << REISERFS_TEST4},
714 {NULL, 0, 0}
1da177e4
LT		 715};
716
717static const arg_desc_t tails[] = {
bd4c625c
LT		 718 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
719 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
720 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
721 {NULL, 0, 0}
1da177e4
LT		 722};
723
724static const arg_desc_t error_actions[] = {
bd4c625c
LT		 725 {"panic", 1 << REISERFS_ERROR_PANIC,
726 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
727 {"ro-remount", 1 << REISERFS_ERROR_RO,
728 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
1da177e4 729#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
bd4c625c
LT		 730 {"continue", 1 << REISERFS_ERROR_CONTINUE,
731 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
1da177e4 732#endif
bd4c625c 733 {NULL, 0, 0},
1da177e4
LT		 734};
735
1da177e4
LT		 736/* proceed only one option from a list *cur - string containing of mount options
737 opts - array of options which are accepted
738 opt_arg - if option is found and requires an argument and if it is specifed
739 in the input - pointer to the argument is stored here
740 bit_flags - if option requires to set a certain bit - it is set here
741 return -1 if unknown option is found, opt->arg_required otherwise */
bd4c625c
LT		 742static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
743 char **opt_arg, unsigned long *bit_flags)
1da177e4 744{
bd4c625c
LT		 745 char *p;
746 /* foo=bar,
747 ^ ^ ^
748 | | +-- option_end
749 | +-- arg_start
750 +-- option_start
751 */
752 const opt_desc_t *opt;
753 const arg_desc_t *arg;
754
755 p = *cur;
756
757 /* assume argument cannot contain commas */
758 *cur = strchr(p, ',');
759 if (*cur) {
760 *(*cur) = '\0';
761 (*cur)++;
762 }
763
764 if (!strncmp(p, "alloc=", 6)) {
765 /* Ugly special case, probably we should redo options parser so that
766 it can understand several arguments for some options, also so that
767 it can fill several bitfields with option values. */
768 if (reiserfs_parse_alloc_options(s, p + 6)) {
769 return -1;
770 } else {
771 return 0;
772 }
773 }
774
775 /* for every option in the list */
776 for (opt = opts; opt->option_name; opt++) {
777 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
778 if (bit_flags) {
779 if (opt->clrmask ==
780 (1 << REISERFS_UNSUPPORTED_OPT))
781 reiserfs_warning(s, "%s not supported.",
782 p);
783 else
784 *bit_flags &= ~opt->clrmask;
785 if (opt->setmask ==
786 (1 << REISERFS_UNSUPPORTED_OPT))
787 reiserfs_warning(s, "%s not supported.",
788 p);
789 else
790 *bit_flags |= opt->setmask;
791 }
792 break;
793 }
794 }
795 if (!opt->option_name) {
796 reiserfs_warning(s, "unknown mount option \"%s\"", p);
797 return -1;
798 }
799
800 p += strlen(opt->option_name);
801 switch (*p) {
802 case '=':
803 if (!opt->arg_required) {
804 reiserfs_warning(s,
805 "the option \"%s\" does not require an argument",
806 opt->option_name);
807 return -1;
808 }
809 break;
810
811 case 0:
812 if (opt->arg_required) {
813 reiserfs_warning(s,
814 "the option \"%s\" requires an argument",
815 opt->option_name);
816 return -1;
817 }
818 break;
819 default:
820 reiserfs_warning(s, "head of option \"%s\" is only correct",
821 opt->option_name);
822 return -1;
823 }
824
825 /* move to the argument, or to next option if argument is not required */
826 p++;
827
828 if (opt->arg_required
829 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
830 && !strlen(p)) {
831 /* this catches "option=," if not allowed */
832 reiserfs_warning(s, "empty argument for \"%s\"",
833 opt->option_name);
834 return -1;
835 }
836
837 if (!opt->values) {
838 /* *=NULLopt_arg contains pointer to argument */
839 *opt_arg = p;
840 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
841 }
842
843 /* values possible for this option are listed in opt->values */
844 for (arg = opt->values; arg->value; arg++) {
845 if (!strcmp(p, arg->value)) {
846 if (bit_flags) {
847 *bit_flags &= ~arg->clrmask;
848 *bit_flags |= arg->setmask;
849 }
850 return opt->arg_required;
851 }
852 }
853
854 reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
855 opt->option_name);
1da177e4 856 return -1;
1da177e4
LT		 857}
858
859/* returns 0 if something is wrong in option string, 1 - otherwise */
bd4c625c
LT		 860static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
861 unsigned long *mount_options,
862 /* after the parsing phase, contains the
863 collection of bitflags defining what
864 mount options were selected. */
865 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
866 char **jdev_name,
867 unsigned int *commit_max_age)
1da177e4 868{
bd4c625c
LT		 869 int c;
870 char *arg = NULL;
871 char *pos;
872 opt_desc_t opts[] = {
873 /* Compatibility stuff, so that -o notail for old setups still work */
874 {"tails",.arg_required = 't',.values = tails},
875 {"notail",.clrmask =
876 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
877 {"conv",.setmask = 1 << REISERFS_CONVERT},
878 {"attrs",.setmask = 1 << REISERFS_ATTRS},
879 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1da177e4 880#ifdef CONFIG_REISERFS_FS_XATTR
bd4c625c
LT		 881 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
882 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1da177e4 883#else
bd4c625c
LT		 884 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
885 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1da177e4
LT		 886#endif
887#ifdef CONFIG_REISERFS_FS_POSIX_ACL
bd4c625c
LT		 888 {"acl",.setmask = 1 << REISERFS_POSIXACL},
889 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1da177e4 890#else
bd4c625c
LT		 891 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
892 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1da177e4 893#endif
cd02b966 894 {.option_name = "nolog"},
bd4c625c
LT		 895 {"replayonly",.setmask = 1 << REPLAYONLY},
896 {"block-allocator",.arg_required = 'a',.values = balloc},
897 {"data",.arg_required = 'd',.values = logging_mode},
898 {"barrier",.arg_required = 'b',.values = barrier_mode},
899 {"resize",.arg_required = 'r',.values = NULL},
900 {"jdev",.arg_required = 'j',.values = NULL},
901 {"nolargeio",.arg_required = 'w',.values = NULL},
902 {"commit",.arg_required = 'c',.values = NULL},
903 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
904 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
905 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
906 {"errors",.arg_required = 'e',.values = error_actions},
907 {"usrjquota",.arg_required =
908 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
909 {"grpjquota",.arg_required =
910 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
911 {"jqfmt",.arg_required = 'f',.values = NULL},
cd02b966 912 {.option_name = NULL}
bd4c625c
LT		 913 };
914
915 *blocks = 0;
916 if (!options || !*options)
917 /* use default configuration: create tails, journaling on, no
918 conversion to newest format */
919 return 1;
920
921 for (pos = options; pos;) {
922 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
923 if (c == -1)
924 /* wrong option is given */
9a3bb301 925 return 0;
1da177e4 926
bd4c625c
LT		 927 if (c == 'r') {
928 char *p;
929
930 p = NULL;
931 /* "resize=NNN" or "resize=auto" */
932
933 if (!strcmp(arg, "auto")) {
934 /* From JFS code, to auto-get the size. */
935 *blocks =
936 s->s_bdev->bd_inode->i_size >> s->
937 s_blocksize_bits;
938 } else {
939 *blocks = simple_strtoul(arg, &p, 0);
940 if (*p != '\0') {
941 /* NNN does not look like a number */
942 reiserfs_warning(s,
943 "reiserfs_parse_options: bad value %s",
944 arg);
945 return 0;
946 }
947 }
1da177e4 948 }
1da177e4 949
bd4c625c
LT		 950 if (c == 'c') {
951 char *p = NULL;
952 unsigned long val = simple_strtoul(arg, &p, 0);
953 /* commit=NNN (time in seconds) */
954 if (*p != '\0' || val >= (unsigned int)-1) {
955 reiserfs_warning(s,
956 "reiserfs_parse_options: bad value %s",
957 arg);
958 return 0;
959 }
960 *commit_max_age = (unsigned int)val;
1da177e4 961 }
1da177e4 962
bd4c625c 963 if (c == 'w') {
36b756f2
AB		 964 reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
965 return 0;
1da177e4 966 }
1da177e4 967
bd4c625c
LT		 968 if (c == 'j') {
969 if (arg && *arg && jdev_name) {
970 if (*jdev_name) { //Hm, already assigned?
971 reiserfs_warning(s,
972 "reiserfs_parse_options: journal device was already specified to be %s",
973 *jdev_name);
974 return 0;
975 }
976 *jdev_name = arg;
977 }
1da177e4 978 }
bd4c625c
LT		 979#ifdef CONFIG_QUOTA
980 if (c == 'u' || c == 'g') {
981 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
982
983 if (sb_any_quota_enabled(s)) {
984 reiserfs_warning(s,
985 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
986 return 0;
987 }
988 if (*arg) { /* Some filename specified? */
989 if (REISERFS_SB(s)->s_qf_names[qtype]
990 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
991 arg)) {
992 reiserfs_warning(s,
993 "reiserfs_parse_options: %s quota file already specified.",
994 QTYPE2NAME(qtype));
995 return 0;
996 }
997 if (strchr(arg, '/')) {
998 reiserfs_warning(s,
999 "reiserfs_parse_options: quotafile must be on filesystem root.");
1000 return 0;
1001 }
1002 REISERFS_SB(s)->s_qf_names[qtype] =
1003 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1004 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
1005 reiserfs_warning(s,
1006 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1007 return 0;
1008 }
1009 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
1010 *mount_options |= 1 << REISERFS_QUOTA;
1011 } else {
833d304b
JL		 1012 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
1013 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
bd4c625c 1014 }
1da177e4 1015 }
bd4c625c
LT		 1016 if (c == 'f') {
1017 if (!strcmp(arg, "vfsold"))
1018 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
1019 else if (!strcmp(arg, "vfsv0"))
1020 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
1021 else {
1022 reiserfs_warning(s,
1023 "reiserfs_parse_options: unknown quota format specified.");
1024 return 0;
1025 }
1da177e4 1026 }
bd4c625c
LT		 1027#else
1028 if (c == 'u' || c == 'g' || c == 'f') {
1029 reiserfs_warning(s,
1030 "reiserfs_parse_options: journalled quota options not supported.");
1031 return 0;
1da177e4 1032 }
bd4c625c
LT		 1033#endif
1034 }
1035
1036#ifdef CONFIG_QUOTA
1037 if (!REISERFS_SB(s)->s_jquota_fmt
1038 && (REISERFS_SB(s)->s_qf_names[USRQUOTA]
1039 || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
1040 reiserfs_warning(s,
1041 "reiserfs_parse_options: journalled quota format not specified.");
1da177e4 1042 return 0;
1da177e4 1043 }
bd4c625c
LT		 1044 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1045 if (!(*mount_options & (1 << REISERFS_QUOTA))
1046 && sb_any_quota_enabled(s)) {
1047 reiserfs_warning(s,
1048 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1049 return 0;
1da177e4
LT		 1050 }
1051#endif
556a2a45 1052
bd4c625c 1053 return 1;
1da177e4
LT		 1054}
1055
bd4c625c
LT		 1056static void switch_data_mode(struct super_block *s, unsigned long mode)
1057{
1058 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1059 (1 << REISERFS_DATA_ORDERED) |
1060 (1 << REISERFS_DATA_WRITEBACK));
1061 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1da177e4
LT		 1062}
1063
1064static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1065{
bd4c625c
LT		 1066 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1067 if (!reiserfs_data_log(s)) {
1068 switch_data_mode(s, REISERFS_DATA_LOG);
1069 reiserfs_info(s, "switching to journaled data mode\n");
1070 }
1071 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1072 if (!reiserfs_data_ordered(s)) {
1073 switch_data_mode(s, REISERFS_DATA_ORDERED);
1074 reiserfs_info(s, "switching to ordered data mode\n");
1075 }
1076 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1077 if (!reiserfs_data_writeback(s)) {
1078 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1079 reiserfs_info(s, "switching to writeback data mode\n");
1080 }
1081 }
1da177e4
LT		 1082}
1083
bd4c625c
LT		 1084static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1085{
1086 int flush = (1 << REISERFS_BARRIER_FLUSH);
1087 int none = (1 << REISERFS_BARRIER_NONE);
1088 int all_barrier = flush | none;
1089
1090 if (bits & all_barrier) {
1091 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1092 if (bits & flush) {
1093 REISERFS_SB(s)->s_mount_opt |= flush;
1094 printk("reiserfs: enabling write barrier flush mode\n");
1095 } else if (bits & none) {
1096 REISERFS_SB(s)->s_mount_opt |= none;
1097 printk("reiserfs: write barriers turned off\n");
1098 }
1099 }
1da177e4
LT		 1100}
1101
bd4c625c 1102static void handle_attrs(struct super_block *s)
1da177e4 1103{
bd4c625c 1104 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1da177e4 1105
bd4c625c
LT		 1106 if (reiserfs_attrs(s)) {
1107 if (old_format_only(s)) {
1108 reiserfs_warning(s,
1109 "reiserfs: cannot support attributes on 3.5.x disk format");
1110 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1da177e4
LT		 1111 return;
1112 }
bd4c625c
LT		 1113 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1114 reiserfs_warning(s,
1115 "reiserfs: cannot support attributes until flag is set in super-block");
1116 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1da177e4
LT		 1117 }
1118 }
1119}
1120
bd4c625c 1121static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1da177e4 1122{
bd4c625c
LT		 1123 struct reiserfs_super_block *rs;
1124 struct reiserfs_transaction_handle th;
1125 unsigned long blocks;
1126 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1127 unsigned long safe_mask = 0;
1128 unsigned int commit_max_age = (unsigned int)-1;
1129 struct reiserfs_journal *journal = SB_JOURNAL(s);
1130 int err;
1da177e4 1131#ifdef CONFIG_QUOTA
bd4c625c 1132 int i;
1da177e4
LT		 1133#endif
1134
bd4c625c 1135 rs = SB_DISK_SUPER_BLOCK(s);
1da177e4 1136
bd4c625c
LT		 1137 if (!reiserfs_parse_options
1138 (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1da177e4 1139#ifdef CONFIG_QUOTA
833d304b
JL		 1140 for (i = 0; i < MAXQUOTAS; i++) {
1141 kfree(REISERFS_SB(s)->s_qf_names[i]);
1142 REISERFS_SB(s)->s_qf_names[i] = NULL;
1143 }
1da177e4 1144#endif
bd4c625c
LT		 1145 return -EINVAL;
1146 }
1147
1148 handle_attrs(s);
1149
1150 /* Add options that are safe here */
1151 safe_mask |= 1 << REISERFS_SMALLTAIL;
1152 safe_mask |= 1 << REISERFS_LARGETAIL;
1153 safe_mask |= 1 << REISERFS_NO_BORDER;
1154 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1155 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1156 safe_mask |= 1 << REISERFS_TEST4;
1157 safe_mask |= 1 << REISERFS_ATTRS;
1158 safe_mask |= 1 << REISERFS_XATTRS_USER;
1159 safe_mask |= 1 << REISERFS_POSIXACL;
1160 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1161 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1162 safe_mask |= 1 << REISERFS_ERROR_RO;
1163 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1164 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1165 safe_mask |= 1 << REISERFS_QUOTA;
1166
1167 /* Update the bitmask, taking care to keep
1168 * the bits we're not allowed to change here */
1169 REISERFS_SB(s)->s_mount_opt =
1170 (REISERFS_SB(s)->
1171 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1172
1173 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1174 journal->j_max_commit_age = commit_max_age;
1175 journal->j_max_trans_age = commit_max_age;
1176 } else if (commit_max_age == 0) {
1177 /* 0 means restore defaults. */
1178 journal->j_max_commit_age = journal->j_default_max_commit_age;
1179 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1180 }
1181
1182 if (blocks) {
1183 int rc = reiserfs_resize(s, blocks);
1184 if (rc != 0)
1185 return rc;
1186 }
1187
1188 if (*mount_flags & MS_RDONLY) {
1189 reiserfs_xattr_init(s, *mount_flags);
1190 /* remount read-only */
1191 if (s->s_flags & MS_RDONLY)
1192 /* it is read-only already */
1193 return 0;
1194 /* try to remount file system with read-only permissions */
1195 if (sb_umount_state(rs) == REISERFS_VALID_FS
1196 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1197 return 0;
1198 }
1199
1200 err = journal_begin(&th, s, 10);
1201 if (err)
1202 return err;
1203
1204 /* Mounting a rw partition read-only. */
1205 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1206 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1207 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1208 } else {
1209 /* remount read-write */
1210 if (!(s->s_flags & MS_RDONLY)) {
1211 reiserfs_xattr_init(s, *mount_flags);
1212 return 0; /* We are read-write already */
1213 }
1214
1215 if (reiserfs_is_journal_aborted(journal))
1216 return journal->j_errno;
1217
1218 handle_data_mode(s, mount_options);
1219 handle_barrier_mode(s, mount_options);
1220 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1221 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1222 err = journal_begin(&th, s, 10);
1223 if (err)
1224 return err;
1225
1226 /* Mount a partition which is read-only, read-write */
1227 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1228 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1229 s->s_flags &= ~MS_RDONLY;
1230 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1231 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1232 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1233 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1234 }
1235 /* this will force a full flush of all journal lists */
1236 SB_JOURNAL(s)->j_must_wait = 1;
1237 err = journal_end(&th, s, 10);
1238 if (err)
1239 return err;
1240 s->s_dirt = 0;
1241
1242 if (!(*mount_flags & MS_RDONLY)) {
1243 finish_unfinished(s);
1244 reiserfs_xattr_init(s, *mount_flags);
1245 }
1246
1247 return 0;
1da177e4
LT		 1248}
1249
bd4c625c 1250static int read_super_block(struct super_block *s, int offset)
1da177e4 1251{
bd4c625c
LT		 1252 struct buffer_head *bh;
1253 struct reiserfs_super_block *rs;
1254 int fs_blocksize;
1da177e4 1255
bd4c625c
LT		 1256 bh = sb_bread(s, offset / s->s_blocksize);
1257 if (!bh) {
1258 reiserfs_warning(s, "sh-2006: read_super_block: "
1259 "bread failed (dev %s, block %lu, size %lu)",
1260 reiserfs_bdevname(s), offset / s->s_blocksize,
1261 s->s_blocksize);
1262 return 1;
1263 }
1da177e4 1264
bd4c625c
LT		 1265 rs = (struct reiserfs_super_block *)bh->b_data;
1266 if (!is_any_reiserfs_magic_string(rs)) {
1267 brelse(bh);
1268 return 1;
1269 }
1270 //
1271 // ok, reiserfs signature (old or new) found in at the given offset
1272 //
1273 fs_blocksize = sb_blocksize(rs);
1274 brelse(bh);
1275 sb_set_blocksize(s, fs_blocksize);
1da177e4 1276
bd4c625c
LT		 1277 bh = sb_bread(s, offset / s->s_blocksize);
1278 if (!bh) {
1279 reiserfs_warning(s, "sh-2007: read_super_block: "
1280 "bread failed (dev %s, block %lu, size %lu)\n",
1281 reiserfs_bdevname(s), offset / s->s_blocksize,
1282 s->s_blocksize);
1283 return 1;
1284 }
1da177e4 1285
bd4c625c
LT		 1286 rs = (struct reiserfs_super_block *)bh->b_data;
1287 if (sb_blocksize(rs) != s->s_blocksize) {
1288 reiserfs_warning(s, "sh-2011: read_super_block: "
1289 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1290 reiserfs_bdevname(s),
1291 (unsigned long long)bh->b_blocknr,
1292 s->s_blocksize);
1293 brelse(bh);
1294 return 1;
1295 }
1da177e4 1296
bd4c625c
LT		 1297 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1298 brelse(bh);
1299 reiserfs_warning(s,
1300 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1301 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1302 "get newer reiserfsprogs package");
1303 return 1;
1da177e4 1304 }
1da177e4 1305
bd4c625c
LT		 1306 SB_BUFFER_WITH_SB(s) = bh;
1307 SB_DISK_SUPER_BLOCK(s) = rs;
1308
1309 if (is_reiserfs_jr(rs)) {
1310 /* magic is of non-standard journal filesystem, look at s_version to
1311 find which format is in use */
1312 if (sb_version(rs) == REISERFS_VERSION_2)
1313 reiserfs_warning(s,
1314 "read_super_block: found reiserfs format \"3.6\""
1315 " with non-standard journal");
1316 else if (sb_version(rs) == REISERFS_VERSION_1)
1317 reiserfs_warning(s,
1318 "read_super_block: found reiserfs format \"3.5\""
1319 " with non-standard journal");
1320 else {
1321 reiserfs_warning(s,
1322 "sh-2012: read_super_block: found unknown "
1323 "format \"%u\" of reiserfs with non-standard magic",
1324 sb_version(rs));
1325 return 1;
1326 }
1327 } else
1328 /* s_version of standard format may contain incorrect information,
1329 so we just look at the magic string */
1330 reiserfs_info(s,
1331 "found reiserfs format \"%s\" with standard journal\n",
1332 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1333
1334 s->s_op = &reiserfs_sops;
1335 s->s_export_op = &reiserfs_export_ops;
1da177e4 1336#ifdef CONFIG_QUOTA
bd4c625c
LT		 1337 s->s_qcop = &reiserfs_qctl_operations;
1338 s->dq_op = &reiserfs_quota_operations;
1da177e4
LT		 1339#endif
1340
bd4c625c
LT		 1341 /* new format is limited by the 32 bit wide i_blocks field, want to
1342 ** be one full block below that.
1343 */
1344 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1345 return 0;
1da177e4
LT		 1346}
1347
1da177e4 1348/* after journal replay, reread all bitmap and super blocks */
bd4c625c
LT		 1349static int reread_meta_blocks(struct super_block *s)
1350{
bd4c625c
LT		 1351 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1352 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1353 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1354 reiserfs_warning(s,
1355 "reread_meta_blocks, error reading the super");
1356 return 1;
1357 }
1da177e4 1358
bd4c625c 1359 return 0;
bd4c625c 1360}
1da177e4
LT		 1361
1362/////////////////////////////////////////////////////
1363// hash detection stuff
1364
1da177e4
LT		 1365// if root directory is empty - we set default - Yura's - hash and
1366// warn about it
1367// FIXME: we look for only one name in a directory. If tea and yura
1368// bith have the same value - we ask user to send report to the
1369// mailing list
bd4c625c 1370static __u32 find_hash_out(struct super_block *s)
1da177e4 1371{
bd4c625c
LT		 1372 int retval;
1373 struct inode *inode;
1374 struct cpu_key key;
1375 INITIALIZE_PATH(path);
1376 struct reiserfs_dir_entry de;
1377 __u32 hash = DEFAULT_HASH;
1378
1379 inode = s->s_root->d_inode;
1380
1381 do { // Some serious "goto"-hater was there ;)
1382 u32 teahash, r5hash, yurahash;
1383
1384 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1385 retval = search_by_entry_key(s, &key, &path, &de);
1386 if (retval == IO_ERROR) {
1387 pathrelse(&path);
1388 return UNSET_HASH;
1389 }
1390 if (retval == NAME_NOT_FOUND)
1391 de.de_entry_num--;
1392 set_de_name_and_namelen(&de);
1393 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1394 /* allow override in this case */
1395 if (reiserfs_rupasov_hash(s)) {
1396 hash = YURA_HASH;
1397 }
1398 reiserfs_warning(s, "FS seems to be empty, autodetect "
1399 "is using the default hash");
1400 break;
1401 }
1402 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1403 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1404 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1405 if (((teahash == r5hash)
1406 &&
1407 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1408 == r5hash)) || ((teahash == yurahash)
1409 && (yurahash ==
1410 GET_HASH_VALUE(deh_offset
1411 (&
1412 (de.
1413 de_deh[de.
1414 de_entry_num])))))
1415 || ((r5hash == yurahash)
1416 && (yurahash ==
1417 GET_HASH_VALUE(deh_offset
1418 (&(de.de_deh[de.de_entry_num])))))) {
1419 reiserfs_warning(s,
1420 "Unable to automatically detect hash function. "
1421 "Please mount with -o hash={tea,rupasov,r5}",
1422 reiserfs_bdevname(s));
1423 hash = UNSET_HASH;
1424 break;
1425 }
1426 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1427 yurahash)
1428 hash = YURA_HASH;
1429 else if (GET_HASH_VALUE
1430 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1431 hash = TEA_HASH;
1432 else if (GET_HASH_VALUE
1433 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1434 hash = R5_HASH;
1435 else {
1436 reiserfs_warning(s, "Unrecognised hash function");
1437 hash = UNSET_HASH;
1438 }
1439 } while (0);
1440
1441 pathrelse(&path);
1442 return hash;
1da177e4
LT		 1443}
1444
1445// finds out which hash names are sorted with
bd4c625c 1446static int what_hash(struct super_block *s)
1da177e4 1447{
bd4c625c
LT		 1448 __u32 code;
1449
1450 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1451
1452 /* reiserfs_hash_detect() == true if any of the hash mount options
1453 ** were used. We must check them to make sure the user isn't
1454 ** using a bad hash value
1455 */
1456 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1457 code = find_hash_out(s);
1458
1459 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1460 /* detection has found the hash, and we must check against the
1461 ** mount options
1462 */
1463 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1464 reiserfs_warning(s, "Error, %s hash detected, "
1465 "unable to force rupasov hash",
1466 reiserfs_hashname(code));
1467 code = UNSET_HASH;
1468 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1469 reiserfs_warning(s, "Error, %s hash detected, "
1470 "unable to force tea hash",
1471 reiserfs_hashname(code));
1472 code = UNSET_HASH;
1473 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1474 reiserfs_warning(s, "Error, %s hash detected, "
1475 "unable to force r5 hash",
1476 reiserfs_hashname(code));
1477 code = UNSET_HASH;
1478 }
1479 } else {
1480 /* find_hash_out was not called or could not determine the hash */
1481 if (reiserfs_rupasov_hash(s)) {
1482 code = YURA_HASH;
1483 } else if (reiserfs_tea_hash(s)) {
1484 code = TEA_HASH;
1485 } else if (reiserfs_r5_hash(s)) {
1486 code = R5_HASH;
1487 }
1488 }
1489
1490 /* if we are mounted RW, and we have a new valid hash code, update
1491 ** the super
1492 */
1493 if (code != UNSET_HASH &&
1494 !(s->s_flags & MS_RDONLY) &&
1495 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1496 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1497 }
1498 return code;
1da177e4
LT		 1499}
1500
1501// return pointer to appropriate function
bd4c625c 1502static hashf_t hash_function(struct super_block *s)
1da177e4 1503{
bd4c625c
LT		 1504 switch (what_hash(s)) {
1505 case TEA_HASH:
1506 reiserfs_info(s, "Using tea hash to sort names\n");
1507 return keyed_hash;
1508 case YURA_HASH:
1509 reiserfs_info(s, "Using rupasov hash to sort names\n");
1510 return yura_hash;
1511 case R5_HASH:
1512 reiserfs_info(s, "Using r5 hash to sort names\n");
1513 return r5_hash;
1514 }
1515 return NULL;
1da177e4
LT		 1516}
1517
1518// this is used to set up correct value for old partitions
bd4c625c 1519static int function2code(hashf_t func)
1da177e4 1520{
bd4c625c
LT		 1521 if (func == keyed_hash)
1522 return TEA_HASH;
1523 if (func == yura_hash)
1524 return YURA_HASH;
1525 if (func == r5_hash)
1526 return R5_HASH;
1da177e4 1527
bd4c625c 1528 BUG(); // should never happen
1da177e4 1529
bd4c625c 1530 return 0;
1da177e4
LT		 1531}
1532
1533#define SWARN(silent, s, ...) \
1534 if (!(silent)) \
1535 reiserfs_warning (s, __VA_ARGS__)
1536
bd4c625c 1537static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1da177e4 1538{
bd4c625c 1539 struct inode *root_inode;
bd4c625c
LT		 1540 struct reiserfs_transaction_handle th;
1541 int old_format = 0;
1542 unsigned long blocks;
1543 unsigned int commit_max_age = 0;
1544 int jinit_done = 0;
1545 struct reiserfs_iget_args args;
1546 struct reiserfs_super_block *rs;
1547 char *jdev_name;
1548 struct reiserfs_sb_info *sbi;
1549 int errval = -EINVAL;
1550
01afb213 1551 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
bd4c625c
LT		 1552 if (!sbi) {
1553 errval = -ENOMEM;
1554 goto error;
1555 }
1556 s->s_fs_info = sbi;
bd4c625c
LT		 1557 /* Set default values for options: non-aggressive tails, RO on errors */
1558 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1559 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1560 /* no preallocation minimum, be smart in
1561 reiserfs_file_write instead */
1562 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1563 /* Preallocate by 16 blocks (17-1) at once */
1564 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1565 /* Initialize the rwsem for xattr dir */
1566 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1567
1568 /* setup default block allocator options */
1569 reiserfs_init_alloc_options(s);
1570
1571 jdev_name = NULL;
1572 if (reiserfs_parse_options
1573 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1574 &commit_max_age) == 0) {
1575 goto error;
1576 }
1577
1578 if (blocks) {
1579 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1580 "for remount only");
1581 goto error;
1582 }
1583
1584 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1585 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1586 old_format = 1;
1587 /* try new format (64-th 1k block), which can contain reiserfs super block */
1588 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1589 SWARN(silent, s,
1590 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1591 reiserfs_bdevname(s));
1592 goto error;
1593 }
1594
1595 rs = SB_DISK_SUPER_BLOCK(s);
1596 /* Let's do basic sanity check to verify that underlying device is not
1597 smaller than the filesystem. If the check fails then abort and scream,
1598 because bad stuff will happen otherwise. */
1599 if (s->s_bdev && s->s_bdev->bd_inode
1600 && i_size_read(s->s_bdev->bd_inode) <
1601 sb_block_count(rs) * sb_blocksize(rs)) {
1602 SWARN(silent, s,
1603 "Filesystem on %s cannot be mounted because it is bigger than the device",
1604 reiserfs_bdevname(s));
1605 SWARN(silent, s,
1606 "You may need to run fsck or increase size of your LVM partition");
1607 SWARN(silent, s,
1608 "Or may be you forgot to reboot after fdisk when it told you to");
1609 goto error;
1610 }
1611
1612 sbi->s_mount_state = SB_REISERFS_STATE(s);
1613 sbi->s_mount_state = REISERFS_VALID_FS;
1614
6f01046b 1615 if ((errval = reiserfs_init_bitmap_cache(s))) {
bd4c625c
LT		 1616 SWARN(silent, s,
1617 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1618 goto error;
1619 }
d2c89a42 1620 errval = -EINVAL;
1da177e4 1621#ifdef CONFIG_REISERFS_CHECK
bd4c625c
LT		 1622 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1623 SWARN(silent, s, "- it is slow mode for debugging.");
1da177e4
LT		 1624#endif
1625
bd4c625c
LT		 1626 /* make data=ordered the default */
1627 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1628 !reiserfs_data_writeback(s)) {
1629 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1630 }
1631
1632 if (reiserfs_data_log(s)) {
1633 reiserfs_info(s, "using journaled data mode\n");
1634 } else if (reiserfs_data_ordered(s)) {
1635 reiserfs_info(s, "using ordered data mode\n");
1636 } else {
1637 reiserfs_info(s, "using writeback data mode\n");
1638 }
1639 if (reiserfs_barrier_flush(s)) {
1640 printk("reiserfs: using flush barriers\n");
1641 }
1642 // set_device_ro(s->s_dev, 1) ;
1643 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1644 SWARN(silent, s,
1645 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1646 goto error;
1647 } else {
1648 jinit_done = 1; /* once this is set, journal_release must be called
1649 ** if we error out of the mount
1650 */
1651 }
1652 if (reread_meta_blocks(s)) {
1653 SWARN(silent, s,
1654 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1655 goto error;
1656 }
1657
1658 if (replay_only(s))
1659 goto error;
1660
1661 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1662 SWARN(silent, s,
1663 "clm-7000: Detected readonly device, marking FS readonly");
1664 s->s_flags |= MS_RDONLY;
1665 }
1666 args.objectid = REISERFS_ROOT_OBJECTID;
1667 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1668 root_inode =
1669 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1670 reiserfs_init_locked_inode, (void *)(&args));
1671 if (!root_inode) {
1672 SWARN(silent, s,
1673 "jmacd-10: reiserfs_fill_super: get root inode failed");
1674 goto error;
1675 }
1676
1677 if (root_inode->i_state & I_NEW) {
1678 reiserfs_read_locked_inode(root_inode, &args);
1679 unlock_new_inode(root_inode);
1680 }
1681
1682 s->s_root = d_alloc_root(root_inode);
1683 if (!s->s_root) {
1684 iput(root_inode);
1685 goto error;
1686 }
1687 // define and initialize hash function
1688 sbi->s_hash_function = hash_function(s);
1689 if (sbi->s_hash_function == NULL) {
1690 dput(s->s_root);
1691 s->s_root = NULL;
1692 goto error;
1693 }
1694
1695 if (is_reiserfs_3_5(rs)
1696 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1697 set_bit(REISERFS_3_5, &(sbi->s_properties));
e1fabd3c
JM		 1698 else if (old_format)
1699 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
bd4c625c
LT		 1700 else
1701 set_bit(REISERFS_3_6, &(sbi->s_properties));
1702
1703 if (!(s->s_flags & MS_RDONLY)) {
1704
1705 errval = journal_begin(&th, s, 1);
1706 if (errval) {
1707 dput(s->s_root);
1708 s->s_root = NULL;
1709 goto error;
1710 }
1711 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1712
1713 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1714 set_sb_fs_state(rs, 0);
1715
1716 if (old_format_only(s)) {
1717 /* filesystem of format 3.5 either with standard or non-standard
1718 journal */
1719 if (convert_reiserfs(s)) {
1720 /* and -o conv is given */
1721 if (!silent)
1722 reiserfs_info(s,
1723 "converting 3.5 filesystem to the 3.6 format");
1724
1725 if (is_reiserfs_3_5(rs))
1726 /* put magic string of 3.6 format. 2.2 will not be able to
1727 mount this filesystem anymore */
1728 memcpy(rs->s_v1.s_magic,
1729 reiserfs_3_6_magic_string,
1730 sizeof
1731 (reiserfs_3_6_magic_string));
1732
1733 set_sb_version(rs, REISERFS_VERSION_2);
1734 reiserfs_convert_objectid_map_v1(s);
1735 set_bit(REISERFS_3_6, &(sbi->s_properties));
1736 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1737 } else if (!silent) {
1738 reiserfs_info(s, "using 3.5.x disk format\n");
1739 }
1740 }
1741
1742 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1743 errval = journal_end(&th, s, 1);
1744 if (errval) {
1745 dput(s->s_root);
1746 s->s_root = NULL;
1747 goto error;
1748 }
1749
1750 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1751 dput(s->s_root);
1752 s->s_root = NULL;
1753 goto error;
1754 }
1755
1756 /* look for files which were to be removed in previous session */
1757 finish_unfinished(s);
1758 } else {
1759 if (old_format_only(s) && !silent) {
1760 reiserfs_info(s, "using 3.5.x disk format\n");
1761 }
1762
1763 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1764 dput(s->s_root);
1765 s->s_root = NULL;
1766 goto error;
1767 }
1768 }
1769 // mark hash in super block: it could be unset. overwrite should be ok
1770 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1771
1772 handle_attrs(s);
1773
1774 reiserfs_proc_info_init(s);
1775
1776 init_waitqueue_head(&(sbi->s_wait));
1777 spin_lock_init(&sbi->bitmap_lock);
1778
1779 return (0);
1780
1781 error:
1782 if (jinit_done) { /* kill the commit thread, free journal ram */
1783 journal_release_error(NULL, s);
1784 }
5065227b
JM		 1785
1786 reiserfs_free_bitmap_cache(s);
bd4c625c
LT		 1787 if (SB_BUFFER_WITH_SB(s))
1788 brelse(SB_BUFFER_WITH_SB(s));
1da177e4 1789#ifdef CONFIG_QUOTA
5065227b
JM		 1790 {
1791 int j;
1792 for (j = 0; j < MAXQUOTAS; j++) {
1793 kfree(sbi->s_qf_names[j]);
1794 sbi->s_qf_names[j] = NULL;
1795 }
bd4c625c 1796 }
1da177e4 1797#endif
833d304b 1798 kfree(sbi);
1da177e4 1799
bd4c625c
LT		 1800 s->s_fs_info = NULL;
1801 return errval;
1da177e4
LT		 1802}
1803
726c3342 1804static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 1805{
726c3342 1806 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
bd4c625c
LT		 1807
1808 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1809 buf->f_bfree = sb_free_blocks(rs);
1810 buf->f_bavail = buf->f_bfree;
1811 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
726c3342 1812 buf->f_bsize = dentry->d_sb->s_blocksize;
bd4c625c
LT		 1813 /* changed to accommodate gcc folks. */
1814 buf->f_type = REISERFS_SUPER_MAGIC;
1815 return 0;
1da177e4
LT		 1816}
1817
1818#ifdef CONFIG_QUOTA
1819static int reiserfs_dquot_initialize(struct inode *inode, int type)
1820{
bd4c625c
LT		 1821 struct reiserfs_transaction_handle th;
1822 int ret, err;
1823
1824 /* We may create quota structure so we need to reserve enough blocks */
1825 reiserfs_write_lock(inode->i_sb);
1826 ret =
1827 journal_begin(&th, inode->i_sb,
1828 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1829 if (ret)
1830 goto out;
1831 ret = dquot_initialize(inode, type);
1832 err =
1833 journal_end(&th, inode->i_sb,
1834 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1835 if (!ret && err)
1836 ret = err;
1837 out:
1838 reiserfs_write_unlock(inode->i_sb);
1839 return ret;
1da177e4
LT		 1840}
1841
1842static int reiserfs_dquot_drop(struct inode *inode)
1843{
bd4c625c
LT		 1844 struct reiserfs_transaction_handle th;
1845 int ret, err;
1846
1847 /* We may delete quota structure so we need to reserve enough blocks */
1848 reiserfs_write_lock(inode->i_sb);
1849 ret =
1850 journal_begin(&th, inode->i_sb,
1851 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1852 if (ret)
1853 goto out;
1854 ret = dquot_drop(inode);
1855 err =
1856 journal_end(&th, inode->i_sb,
1857 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1858 if (!ret && err)
1859 ret = err;
1860 out:
1861 reiserfs_write_unlock(inode->i_sb);
1862 return ret;
1da177e4
LT		 1863}
1864
1865static int reiserfs_write_dquot(struct dquot *dquot)
1866{
bd4c625c
LT		 1867 struct reiserfs_transaction_handle th;
1868 int ret, err;
1869
1870 reiserfs_write_lock(dquot->dq_sb);
1871 ret =
1872 journal_begin(&th, dquot->dq_sb,
1873 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1874 if (ret)
1875 goto out;
1876 ret = dquot_commit(dquot);
1877 err =
1878 journal_end(&th, dquot->dq_sb,
1879 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1880 if (!ret && err)
1881 ret = err;
1882 out:
1883 reiserfs_write_unlock(dquot->dq_sb);
1884 return ret;
1da177e4
LT		 1885}
1886
1887static int reiserfs_acquire_dquot(struct dquot *dquot)
1888{
bd4c625c
LT		 1889 struct reiserfs_transaction_handle th;
1890 int ret, err;
1891
1892 reiserfs_write_lock(dquot->dq_sb);
1893 ret =
1894 journal_begin(&th, dquot->dq_sb,
1895 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1896 if (ret)
1897 goto out;
1898 ret = dquot_acquire(dquot);
1899 err =
1900 journal_end(&th, dquot->dq_sb,
1901 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1902 if (!ret && err)
1903 ret = err;
1904 out:
1905 reiserfs_write_unlock(dquot->dq_sb);
1906 return ret;
1da177e4
LT		 1907}
1908
1909static int reiserfs_release_dquot(struct dquot *dquot)
1910{
bd4c625c
LT		 1911 struct reiserfs_transaction_handle th;
1912 int ret, err;
1913
1914 reiserfs_write_lock(dquot->dq_sb);
1915 ret =
1916 journal_begin(&th, dquot->dq_sb,
1917 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1918 if (ret)
1919 goto out;
1920 ret = dquot_release(dquot);
1921 err =
1922 journal_end(&th, dquot->dq_sb,
1923 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1924 if (!ret && err)
1925 ret = err;
1926 out:
1927 reiserfs_write_unlock(dquot->dq_sb);
1928 return ret;
1da177e4
LT		 1929}
1930
1931static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1932{
bd4c625c
LT		 1933 /* Are we journalling quotas? */
1934 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1935 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1936 dquot_mark_dquot_dirty(dquot);
1937 return reiserfs_write_dquot(dquot);
1938 } else
1939 return dquot_mark_dquot_dirty(dquot);
1da177e4
LT		 1940}
1941
1942static int reiserfs_write_info(struct super_block *sb, int type)
1943{
bd4c625c
LT		 1944 struct reiserfs_transaction_handle th;
1945 int ret, err;
1946
1947 /* Data block + inode block */
1948 reiserfs_write_lock(sb);
1949 ret = journal_begin(&th, sb, 2);
1950 if (ret)
1951 goto out;
1952 ret = dquot_commit_info(sb, type);
1953 err = journal_end(&th, sb, 2);
1954 if (!ret && err)
1955 ret = err;
1956 out:
1957 reiserfs_write_unlock(sb);
1958 return ret;
1da177e4
LT		 1959}
1960
1961/*
84de856e 1962 * Turn on quotas during mount time - we need to find the quota file and such...
1da177e4
LT		 1963 */
1964static int reiserfs_quota_on_mount(struct super_block *sb, int type)
1965{
84de856e 1966 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
bd4c625c 1967 REISERFS_SB(sb)->s_jquota_fmt, type);
1da177e4
LT		 1968}
1969
1970/*
1971 * Standard function to be called on quota_on
1972 */
bd4c625c
LT		 1973static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
1974 char *path)
1da177e4 1975{
bd4c625c
LT		 1976 int err;
1977 struct nameidata nd;
1978
1979 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
1980 return -EINVAL;
1981 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
1982 if (err)
1983 return err;
1984 /* Quotafile not on the same filesystem? */
1985 if (nd.mnt->mnt_sb != sb) {
1986 path_release(&nd);
1987 return -EXDEV;
1988 }
1989 /* We must not pack tails for quota files on reiserfs for quota IO to work */
1990 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
1991 reiserfs_warning(sb,
1992 "reiserfs: Quota file must have tail packing disabled.");
1993 path_release(&nd);
1994 return -EINVAL;
1995 }
1996 /* Not journalling quota? No more tests needed... */
1997 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
1998 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
1999 path_release(&nd);
2000 return vfs_quota_on(sb, type, format_id, path);
2001 }
2002 /* Quotafile not of fs root? */
2003 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2004 reiserfs_warning(sb,
2005 "reiserfs: Quota file not on filesystem root. "
2006 "Journalled quota will not work.");
1da177e4 2007 path_release(&nd);
bd4c625c 2008 return vfs_quota_on(sb, type, format_id, path);
1da177e4
LT		 2009}
2010
2011/* Read data from quotafile - avoid pagecache and such because we cannot afford
2012 * acquiring the locks... As quota files are never truncated and quota code
2013 * itself serializes the operations (and noone else should touch the files)
2014 * we don't have to be afraid of races */
2015static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2016 size_t len, loff_t off)
2017{
bd4c625c
LT		 2018 struct inode *inode = sb_dqopt(sb)->files[type];
2019 unsigned long blk = off >> sb->s_blocksize_bits;
2020 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2021 size_t toread;
2022 struct buffer_head tmp_bh, *bh;
2023 loff_t i_size = i_size_read(inode);
2024
2025 if (off > i_size)
2026 return 0;
2027 if (off + len > i_size)
2028 len = i_size - off;
2029 toread = len;
2030 while (toread > 0) {
2031 tocopy =
2032 sb->s_blocksize - offset <
2033 toread ? sb->s_blocksize - offset : toread;
2034 tmp_bh.b_state = 0;
2035 /* Quota files are without tails so we can safely use this function */
2036 reiserfs_write_lock(sb);
2037 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2038 reiserfs_write_unlock(sb);
2039 if (err)
2040 return err;
2041 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2042 memset(data, 0, tocopy);
2043 else {
2044 bh = sb_bread(sb, tmp_bh.b_blocknr);
2045 if (!bh)
2046 return -EIO;
2047 memcpy(data, bh->b_data + offset, tocopy);
2048 brelse(bh);
2049 }
2050 offset = 0;
2051 toread -= tocopy;
2052 data += tocopy;
2053 blk++;
2054 }
2055 return len;
1da177e4
LT		 2056}
2057
2058/* Write to quotafile (we know the transaction is already started and has
2059 * enough credits) */
2060static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2061 const char *data, size_t len, loff_t off)
2062{
bd4c625c
LT		 2063 struct inode *inode = sb_dqopt(sb)->files[type];
2064 unsigned long blk = off >> sb->s_blocksize_bits;
2065 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2066 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2067 size_t towrite = len;
2068 struct buffer_head tmp_bh, *bh;
2069
5c81a419 2070 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
bd4c625c
LT		 2071 while (towrite > 0) {
2072 tocopy = sb->s_blocksize - offset < towrite ?
2073 sb->s_blocksize - offset : towrite;
2074 tmp_bh.b_state = 0;
2075 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2076 if (err)
2077 goto out;
2078 if (offset || tocopy != sb->s_blocksize)
2079 bh = sb_bread(sb, tmp_bh.b_blocknr);
2080 else
2081 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2082 if (!bh) {
2083 err = -EIO;
2084 goto out;
2085 }
2086 lock_buffer(bh);
2087 memcpy(bh->b_data + offset, data, tocopy);
2088 flush_dcache_page(bh->b_page);
2089 set_buffer_uptodate(bh);
2090 unlock_buffer(bh);
2091 reiserfs_prepare_for_journal(sb, bh, 1);
2092 journal_mark_dirty(current->journal_info, sb, bh);
2093 if (!journal_quota)
2094 reiserfs_add_ordered_list(inode, bh);
2095 brelse(bh);
2096 offset = 0;
2097 towrite -= tocopy;
2098 data += tocopy;
2099 blk++;
2100 }
2101 out:
2102 if (len == towrite)
2103 return err;
2104 if (inode->i_size < off + len - towrite)
2105 i_size_write(inode, off + len - towrite);
2106 inode->i_version++;
2107 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2108 mark_inode_dirty(inode);
1b1dcc1b 2109 mutex_unlock(&inode->i_mutex);
bd4c625c 2110 return len - towrite;
1da177e4
LT		 2111}
2112
2113#endif
2114
454e2398
DH		 2115static int get_super_block(struct file_system_type *fs_type,
2116 int flags, const char *dev_name,
2117 void *data, struct vfsmount *mnt)
1da177e4 2118{
454e2398
DH		 2119 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2120 mnt);
1da177e4
LT		 2121}
2122
bd4c625c 2123static int __init init_reiserfs_fs(void)
1da177e4
LT		 2124{
2125 int ret;
2126
bd4c625c 2127 if ((ret = init_inodecache())) {
1da177e4
LT		 2128 return ret;
2129 }
2130
bd4c625c
LT		 2131 if ((ret = reiserfs_xattr_register_handlers()))
2132 goto failed_reiserfs_xattr_register_handlers;
1da177e4 2133
bd4c625c
LT		 2134 reiserfs_proc_info_global_init();
2135 reiserfs_proc_register_global("version",
2136 reiserfs_global_version_in_proc);
1da177e4 2137
bd4c625c 2138 ret = register_filesystem(&reiserfs_fs_type);
1da177e4
LT		 2139
2140 if (ret == 0) {
2141 return 0;
2142 }
2143
bd4c625c 2144 reiserfs_xattr_unregister_handlers();
1da177e4 2145
bd4c625c
LT		 2146 failed_reiserfs_xattr_register_handlers:
2147 reiserfs_proc_unregister_global("version");
2148 reiserfs_proc_info_global_done();
2149 destroy_inodecache();
1da177e4
LT		 2150
2151 return ret;
2152}
2153
bd4c625c 2154static void __exit exit_reiserfs_fs(void)
1da177e4 2155{
bd4c625c
LT		 2156 reiserfs_xattr_unregister_handlers();
2157 reiserfs_proc_unregister_global("version");
2158 reiserfs_proc_info_global_done();
2159 unregister_filesystem(&reiserfs_fs_type);
2160 destroy_inodecache();
1da177e4
LT		 2161}
2162
2163struct file_system_type reiserfs_fs_type = {
bd4c625c
LT		 2164 .owner = THIS_MODULE,
2165 .name = "reiserfs",
2166 .get_sb = get_super_block,
edc666e2 2167 .kill_sb = reiserfs_kill_sb,
bd4c625c 2168 .fs_flags = FS_REQUIRES_DEV,
1da177e4
LT		 2169};
2170
bd4c625c
LT		 2171MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2172MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2173MODULE_LICENSE("GPL");
1da177e4 2174
bd4c625c
LT		 2175module_init(init_reiserfs_fs);
2176module_exit(exit_reiserfs_fs);
Linux kernel - Deliverables
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