blob: 7054aaef049312b82239b34be4dd5a09ebd70b4a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#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>
Kirill Korotaev6b3286e2006-12-08 02:37:56 -080026#include <linux/mnt_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#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
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070037int is_reiserfs_3_5(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070038{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070039 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
40 strlen(reiserfs_3_5_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070041}
42
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070043int is_reiserfs_3_6(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070044{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070045 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
46 strlen(reiserfs_3_6_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070047}
48
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070049int is_reiserfs_jr(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070050{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070051 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
52 strlen(reiserfs_jr_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070053}
54
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070055static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070056{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070057 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
58 is_reiserfs_jr(rs));
Linus Torvalds1da177e2005-04-16 15:20:36 -070059}
60
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070061static int reiserfs_remount(struct super_block *s, int *flags, char *data);
David Howells726c3342006-06-23 02:02:58 -070062static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070064static int reiserfs_sync_fs(struct super_block *s, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070066 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079}
80
81static void reiserfs_write_super(struct super_block *s)
82{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070083 reiserfs_sync_fs(s, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084}
85
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070086static void reiserfs_write_super_lockfs(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070088 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104}
105
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700106static void reiserfs_unlockfs(struct super_block *s)
107{
108 reiserfs_allow_writes(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109}
110
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700111extern const struct in_core_key MAX_IN_CORE_KEY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
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 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700120static int remove_save_link_only(struct super_block *s,
121 struct reiserfs_key *key, int oid_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700123 struct reiserfs_transaction_handle th;
124 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700126 /* we are going to do one balancing */
127 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
128 if (err)
129 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700131 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139#ifdef CONFIG_QUOTA
140static int reiserfs_quota_on_mount(struct super_block *, int);
141#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143/* look for uncompleted unlinks and truncates and complete them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700144static int finish_unfinished(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700146 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700158 int i;
159 int ms_active_set;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700161
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700170 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700177 /* 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700189 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700200 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++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700289 REISERFS_SB(s)->s_is_unlinked_ok = 0;
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700292 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700301 pathrelse(&path);
302 if (done)
303 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
304 "Completed\n", done);
305 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308/* 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 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700312void add_save_link(struct reiserfs_transaction_handle *th,
313 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700315 INITIALIZE_PATH(path);
316 int retval;
317 struct cpu_key key;
318 struct item_head ih;
319 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700321 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700323 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700333 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700342 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700355 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700361 /* 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700372 /* body of "save" link */
373 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700375 /* 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390}
391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700393int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700395 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 }
417
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431}
432
David Howellsedc666e2006-10-11 01:22:14 -0700433static void reiserfs_kill_sb(struct super_block *s)
434{
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 }
441
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 }
447 }
448
449 kill_block_super(s);
450}
451
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700452static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700454 struct reiserfs_transaction_handle th;
455 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700457 /* 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700468 /* note, journal_release checks for readonly mount, and can decide not
469 ** to do a journal_end
470 */
471 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Jeff Mahoney50652272006-09-30 23:28:44 -0700473 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700475 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700477 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700479 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700485 reiserfs_proc_info_done(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700487 kfree(s->s_fs_info);
488 s->s_fs_info = NULL;
489
490 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491}
492
Christoph Lametere18b8902006-12-06 20:33:20 -0800493static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
495static struct inode *reiserfs_alloc_inode(struct super_block *sb)
496{
497 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700498 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800499 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 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
Christoph Lametere18b8902006-12-06 20:33:20 -0800510static void init_once(void *foo, struct kmem_cache * cachep, unsigned long flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700512 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Christoph Lameter50953fe2007-05-06 14:50:16 -0700514 if (flags & SLAB_CTOR_CONSTRUCTOR) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700515 INIT_LIST_HEAD(&ei->i_prealloc_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 inode_init_once(&ei->vfs_inode);
Alexey Dobriyancfe14672006-09-29 02:00:00 -0700517#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 ei->i_acl_access = NULL;
519 ei->i_acl_default = NULL;
Alexey Dobriyancfe14672006-09-29 02:00:00 -0700520#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 }
522}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700523
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524static int init_inodecache(void)
525{
526 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700527 sizeof(struct
528 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800529 0, (SLAB_RECLAIM_ACCOUNT|
530 SLAB_MEM_SPREAD),
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700531 init_once, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 if (reiserfs_inode_cachep == NULL)
533 return -ENOMEM;
534 return 0;
535}
536
537static void destroy_inodecache(void)
538{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700539 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540}
541
542/* we don't mark inodes dirty, we just log them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700543static void reiserfs_dirty_inode(struct inode *inode)
544{
545 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700547 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700556 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567}
568
Alexey Dobriyancfe14672006-09-29 02:00:00 -0700569#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700570static void reiserfs_clear_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700572 struct posix_acl *acl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700574 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700579 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583}
Alexey Dobriyancfe14672006-09-29 02:00:00 -0700584#else
585#define reiserfs_clear_inode NULL
586#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
588#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700589static 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593#endif
594
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800595static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700596 .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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700610 .quota_read = reiserfs_quota_read,
611 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612#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
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700627static 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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640};
641
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700642static 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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650};
651#endif
652
653static struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700654 .encode_fh = reiserfs_encode_fh,
655 .decode_fh = reiserfs_decode_fh,
656 .get_parent = reiserfs_get_parent,
657 .get_dentry = reiserfs_get_dentry,
658};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659
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 {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700663 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669} 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 {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700677 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685} opt_desc_t;
686
687/* possible values for -o data= */
688static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700689 {"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)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800695 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696};
697
698/* possible values for -o barrier= */
699static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700700 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
701 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800702 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703};
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[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700708 {"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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715};
716
717static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700718 {"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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722};
723
724static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700725 {"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)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700730 {"continue", 1 << REISERFS_ERROR_CONTINUE,
731 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700733 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734};
735
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736/* 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 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700742static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
743 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700745 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700755 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700757 /* assume argument cannot contain commas */
758 *cur = strchr(p, ',');
759 if (*cur) {
760 *(*cur) = '\0';
761 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700764 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700774
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);
856 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857}
858
859/* returns 0 if something is wrong in option string, 1 - otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700860static 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)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700869 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},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700881 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
882 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700884 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
885 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886#endif
887#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700888 {"acl",.setmask = 1 << REISERFS_POSIXACL},
889 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700891 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
892 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800894 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700895 {"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},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800912 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700913 };
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 */
925 return 0;
926
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 }
948 }
949
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;
961 }
962
963 if (c == 'w') {
Adrian Bunk36b756f2006-09-27 01:50:50 -0700964 reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
965 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700966 }
967
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 }
978 }
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 {
James Lamanna833d3042005-10-30 15:00:16 -08001012 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
1013 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001014 }
1015 }
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 }
1026 }
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;
1032 }
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.");
1042 return 0;
1043 }
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;
1050 }
1051#endif
1052
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054}
1055
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001056static 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062}
1063
1064static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1065{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001066 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082}
1083
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001084static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001086 int flush = (1 << REISERFS_BARRIER_FLUSH);
1087 int none = (1 << REISERFS_BARRIER_NONE);
1088 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001090 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 }
1100}
1101
1102static void handle_attrs(struct super_block *s)
1103{
1104 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1105
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 return;
1112 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001113 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 }
1118 }
1119}
1120
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001121static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001123 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001132 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133#endif
1134
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001135 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001137 if (!reiserfs_parse_options
1138 (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139#ifdef CONFIG_QUOTA
James Lamanna833d3042005-10-30 15:00:16 -08001140 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 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001144#endif
1145 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001148 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001150 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001167 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001173 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001182 if (blocks) {
1183 int rc = reiserfs_resize(s, blocks);
1184 if (rc != 0)
1185 return rc;
1186 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001188 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001200 err = journal_begin(&th, s, 10);
1201 if (err)
1202 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001204 /* 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001215 if (reiserfs_is_journal_aborted(journal))
1216 return journal->j_errno;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001218 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001226 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248}
1249
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001250static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001252 struct buffer_head *bh;
1253 struct reiserfs_super_block *rs;
1254 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001256 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001265 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);
1276
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 }
1285
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 }
1296
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;
1304 }
1305
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001337 s->s_qcop = &reiserfs_qctl_operations;
1338 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339#endif
1340
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001341 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346}
1347
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001349static int reread_meta_blocks(struct super_block *s)
1350{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001351 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001359 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360}
1361
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362/////////////////////////////////////////////////////
1363// hash detection stuff
1364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365// 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
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001370static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001372 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001379 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001381 do { // Some serious "goto"-hater was there ;)
1382 u32 teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001384 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001441 pathrelse(&path);
1442 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443}
1444
1445// finds out which hash names are sorted with
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001446static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001448 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001450 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001452 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001459 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001490 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499}
1500
1501// return pointer to appropriate function
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001502static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001504 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516}
1517
1518// this is used to set up correct value for old partitions
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001519static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001521 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001528 BUG(); // should never happen
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001530 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531}
1532
1533#define SWARN(silent, s, ...) \
1534 if (!(silent)) \
1535 reiserfs_warning (s, __VA_ARGS__)
1536
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001537static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001539 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001540 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550
Yan Burman01afb212006-12-06 20:39:01 -08001551 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001552 if (!sbi) {
1553 errval = -ENOMEM;
1554 goto error;
1555 }
1556 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001557 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001568 /* setup default block allocator options */
1569 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001571 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001578 if (blocks) {
1579 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1580 "for remount only");
1581 goto error;
1582 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001584 /* 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001595 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001612 sbi->s_mount_state = SB_REISERFS_STATE(s);
1613 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614
Jeff Mahoney6f010462006-09-30 23:28:43 -07001615 if ((errval = reiserfs_init_bitmap_cache(s))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001616 SWARN(silent, s,
1617 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1618 goto error;
1619 }
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001620 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621#ifdef CONFIG_REISERFS_CHECK
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001622 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1623 SWARN(silent, s, "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624#endif
1625
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001626 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 }
1631
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001632 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 }
1657
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001658 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 }
1676
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001677 if (root_inode->i_state & I_NEW) {
1678 reiserfs_read_locked_inode(root_inode, &args);
1679 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 }
1681
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001682 s->s_root = d_alloc_root(root_inode);
1683 if (!s->s_root) {
1684 iput(root_inode);
1685 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001687 // 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001694
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));
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07001698 else if (old_format)
1699 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001700 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 }
Jeff Mahoney50652272006-09-30 23:28:44 -07001785
1786 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001787 if (SB_BUFFER_WITH_SB(s))
1788 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07001790 {
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 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001796 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797#endif
James Lamanna833d3042005-10-30 15:00:16 -08001798 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001800 s->s_fs_info = NULL;
1801 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802}
1803
David Howells726c3342006-06-23 02:02:58 -07001804static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805{
David Howells726c3342006-06-23 02:02:58 -07001806 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001807
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;
David Howells726c3342006-06-23 02:02:58 -07001812 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001813 /* changed to accommodate gcc folks. */
1814 buf->f_type = REISERFS_SUPER_MAGIC;
1815 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816}
1817
1818#ifdef CONFIG_QUOTA
1819static int reiserfs_dquot_initialize(struct inode *inode, int type)
1820{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001821 struct reiserfs_transaction_handle th;
1822 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001824 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840}
1841
1842static int reiserfs_dquot_drop(struct inode *inode)
1843{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001844 struct reiserfs_transaction_handle th;
1845 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001847 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863}
1864
1865static int reiserfs_write_dquot(struct dquot *dquot)
1866{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001867 struct reiserfs_transaction_handle th;
1868 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001870 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885}
1886
1887static int reiserfs_acquire_dquot(struct dquot *dquot)
1888{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001889 struct reiserfs_transaction_handle th;
1890 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001892 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907}
1908
1909static int reiserfs_release_dquot(struct dquot *dquot)
1910{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001911 struct reiserfs_transaction_handle th;
1912 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001914 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929}
1930
1931static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1932{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001933 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940}
1941
1942static int reiserfs_write_info(struct super_block *sb, int type)
1943{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001944 struct reiserfs_transaction_handle th;
1945 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001947 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959}
1960
1961/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07001962 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 */
1964static int reiserfs_quota_on_mount(struct super_block *sb, int type)
1965{
Christoph Hellwig84de8562005-06-23 00:09:16 -07001966 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001967 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968}
1969
1970/*
1971 * Standard function to be called on quota_on
1972 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001973static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
1974 char *path)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001976 int err;
1977 struct nameidata nd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001979 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.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007 path_release(&nd);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002008 return vfs_quota_on(sb, type, format_id, path);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009}
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{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002018 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002025 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++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002055 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056}
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{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002063 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069
Arjan van de Ven5c81a412006-07-03 00:25:20 -07002070 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002071 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++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002101 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);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08002109 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002110 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111}
2112
2113#endif
2114
David Howells454e2392006-06-23 02:02:57 -07002115static int get_super_block(struct file_system_type *fs_type,
2116 int flags, const char *dev_name,
2117 void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118{
David Howells454e2392006-06-23 02:02:57 -07002119 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2120 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121}
2122
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002123static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124{
2125 int ret;
2126
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002127 if ((ret = init_inodecache())) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 return ret;
2129 }
2130
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002131 if ((ret = reiserfs_xattr_register_handlers()))
2132 goto failed_reiserfs_xattr_register_handlers;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002134 reiserfs_proc_info_global_init();
2135 reiserfs_proc_register_global("version",
2136 reiserfs_global_version_in_proc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002138 ret = register_filesystem(&reiserfs_fs_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139
2140 if (ret == 0) {
2141 return 0;
2142 }
2143
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002144 reiserfs_xattr_unregister_handlers();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002146 failed_reiserfs_xattr_register_handlers:
2147 reiserfs_proc_unregister_global("version");
2148 reiserfs_proc_info_global_done();
2149 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002150
2151 return ret;
2152}
2153
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002154static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002156 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();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161}
2162
2163struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002164 .owner = THIS_MODULE,
2165 .name = "reiserfs",
2166 .get_sb = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002167 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002168 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169};
2170
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002171MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2172MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2173MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002175module_init(init_reiserfs_fs);
2176module_exit(exit_reiserfs_fs);