blob: b243117b8752d0a9c81fa8f12773ca202a9cfabb [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/vmalloc.h>
17#include <linux/time.h>
18#include <asm/uaccess.h>
19#include <linux/reiserfs_fs.h>
20#include <linux/reiserfs_acl.h>
21#include <linux/reiserfs_xattr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/init.h>
23#include <linux/blkdev.h>
24#include <linux/buffer_head.h>
Christoph Hellwiga5694252007-07-17 04:04:28 -070025#include <linux/exportfs.h>
Jan Kara74abb982008-07-25 01:46:51 -070026#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/vfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/mount.h>
29#include <linux/namei.h>
Coly Li651d0622009-04-02 16:59:41 -070030#include <linux/crc32.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32struct file_system_type reiserfs_fs_type;
33
34static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
35static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
36static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
37
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070038int is_reiserfs_3_5(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070039{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070040 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
41 strlen(reiserfs_3_5_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070042}
43
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070044int is_reiserfs_3_6(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070046 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
47 strlen(reiserfs_3_6_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070048}
49
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070050int is_reiserfs_jr(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070051{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070052 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
53 strlen(reiserfs_jr_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070054}
55
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070056static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070058 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
59 is_reiserfs_jr(rs));
Linus Torvalds1da177e2005-04-16 15:20:36 -070060}
61
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070062static int reiserfs_remount(struct super_block *s, int *flags, char *data);
David Howells726c3342006-06-23 02:02:58 -070063static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070065static int reiserfs_sync_fs(struct super_block *s, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
Christoph Hellwig5af79262009-05-05 15:41:25 +020067 struct reiserfs_transaction_handle th;
68
69 reiserfs_write_lock(s);
70 if (!journal_begin(&th, s, 1))
71 if (!journal_end_sync(&th, s, 1))
72 reiserfs_flush_old_commits(s);
73 s->s_dirt = 0; /* Even if it's not true.
74 * We'll loop forever in sync_supers otherwise */
75 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070076 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
78
79static void reiserfs_write_super(struct super_block *s)
80{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070081 reiserfs_sync_fs(s, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082}
83
Takashi Satoc4be0c12009-01-09 16:40:58 -080084static int reiserfs_freeze(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070086 struct reiserfs_transaction_handle th;
87 reiserfs_write_lock(s);
88 if (!(s->s_flags & MS_RDONLY)) {
89 int err = journal_begin(&th, s, 1);
90 if (err) {
91 reiserfs_block_writes(&th);
92 } else {
93 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
94 1);
95 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
96 reiserfs_block_writes(&th);
97 journal_end_sync(&th, s, 1);
98 }
99 }
100 s->s_dirt = 0;
101 reiserfs_write_unlock(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800102 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103}
104
Takashi Satoc4be0c12009-01-09 16:40:58 -0800105static int reiserfs_unfreeze(struct super_block *s)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700106{
107 reiserfs_allow_writes(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800108 return 0;
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;
Lepton Wufb46f342007-10-16 23:30:04 -0700148 struct reiserfs_key save_link_key, last_inode_key;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700149 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;
Jan Karaf4b113a2010-05-21 19:12:51 +0200160 int quota_enabled[MAXQUOTAS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700162
163 /* compose key to look for "save" links */
164 max_cpu_key.version = KEY_FORMAT_3_5;
165 max_cpu_key.on_disk_key.k_dir_id = ~0U;
166 max_cpu_key.on_disk_key.k_objectid = ~0U;
167 set_cpu_key_k_offset(&max_cpu_key, ~0U);
168 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Lepton Wufb46f342007-10-16 23:30:04 -0700170 memset(&last_inode_key, 0, sizeof(last_inode_key));
171
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700173 /* Needed for iput() to work correctly and not trash data */
174 if (s->s_flags & MS_ACTIVE) {
175 ms_active_set = 0;
176 } else {
177 ms_active_set = 1;
178 s->s_flags |= MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700180 /* Turn on quotas so that they are updated correctly */
181 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200182 quota_enabled[i] = 1;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700183 if (REISERFS_SB(s)->s_qf_names[i]) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200184 int ret;
185
186 if (sb_has_quota_active(s, i)) {
187 quota_enabled[i] = 0;
188 continue;
189 }
190 ret = reiserfs_quota_on_mount(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700191 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400192 reiserfs_warning(s, "reiserfs-2500",
193 "cannot turn on journaled "
194 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700195 }
196 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700199 done = 0;
200 REISERFS_SB(s)->s_is_unlinked_ok = 1;
201 while (!retval) {
202 retval = search_item(s, &max_cpu_key, &path);
203 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400204 reiserfs_error(s, "vs-2140",
205 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700206 break;
207 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700209 bh = get_last_bh(&path);
210 item_pos = get_item_pos(&path);
211 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400212 reiserfs_warning(s, "vs-2060",
213 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700214 break;
215 }
216 item_pos--;
217 ih = B_N_PITEM_HEAD(bh, item_pos);
218
219 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
220 /* there are no "save" links anymore */
221 break;
222
223 save_link_key = ih->ih_key;
224 if (is_indirect_le_ih(ih))
225 truncate = 1;
226 else
227 truncate = 0;
228
229 /* reiserfs_iget needs k_dirid and k_objectid only */
230 item = B_I_PITEM(bh, ih);
231 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
232 obj_key.on_disk_key.k_objectid =
233 le32_to_cpu(ih->ih_key.k_objectid);
234 obj_key.on_disk_key.k_offset = 0;
235 obj_key.on_disk_key.k_type = 0;
236
237 pathrelse(&path);
238
239 inode = reiserfs_iget(s, &obj_key);
240 if (!inode) {
241 /* the unlink almost completed, it just did not manage to remove
242 "save" link and release objectid */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400243 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700244 &obj_key);
245 retval = remove_save_link_only(s, &save_link_key, 1);
246 continue;
247 }
248
249 if (!truncate && inode->i_nlink) {
250 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400251 reiserfs_warning(s, "vs-2185",
252 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700253 &obj_key);
254 retval = remove_save_link_only(s, &save_link_key, 0);
255 continue;
256 }
Christoph Hellwig871a2932010-03-03 09:05:07 -0500257 dquot_initialize(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700258
259 if (truncate && S_ISDIR(inode->i_mode)) {
260 /* We got a truncate request for a dir which is impossible.
261 The only imaginable way is to execute unfinished truncate request
262 then boot into old kernel, remove the file and create dir with
263 the same key. */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400264 reiserfs_warning(s, "green-2101",
265 "impossible truncate on a "
266 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700267 INODE_PKEY(inode));
268 retval = remove_save_link_only(s, &save_link_key, 0);
269 truncate = 0;
270 iput(inode);
271 continue;
272 }
273
274 if (truncate) {
275 REISERFS_I(inode)->i_flags |=
276 i_link_saved_truncate_mask;
277 /* not completed truncate found. New size was committed together
278 with "save" link */
279 reiserfs_info(s, "Truncating %k to %Ld ..",
280 INODE_PKEY(inode), inode->i_size);
281 reiserfs_truncate_file(inode,
282 0
283 /*don't update modification time */
284 );
285 retval = remove_save_link(inode, truncate);
286 } else {
287 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
288 /* not completed unlink (rmdir) found */
289 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700290 if (memcmp(&last_inode_key, INODE_PKEY(inode),
291 sizeof(last_inode_key))){
292 last_inode_key = *INODE_PKEY(inode);
293 /* removal gets completed in iput */
294 retval = 0;
295 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400296 reiserfs_warning(s, "super-2189", "Dead loop "
297 "in finish_unfinished "
298 "detected, just remove "
299 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700300 retval = remove_save_link_only(s,
301 &save_link_key, 0);
302 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700303 }
304
305 iput(inode);
306 printk("done\n");
307 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700309 REISERFS_SB(s)->s_is_unlinked_ok = 0;
310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700312 /* Turn quotas off */
313 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200314 if (sb_dqopt(s)->files[i] && quota_enabled[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400315 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700316 }
317 if (ms_active_set)
318 /* Restore the flag back */
319 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700321 pathrelse(&path);
322 if (done)
323 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
324 "Completed\n", done);
325 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328/* to protect file being unlinked from getting lost we "safe" link files
329 being unlinked. This link will be deleted in the same transaction with last
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200330 item of file. mounting the filesystem we scan all these links and remove
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 files which almost got lost */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700332void add_save_link(struct reiserfs_transaction_handle *th,
333 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700335 INITIALIZE_PATH(path);
336 int retval;
337 struct cpu_key key;
338 struct item_head ih;
339 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700341 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700343 /* file can only get one "save link" of each kind */
344 RFALSE(truncate &&
345 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
346 "saved link already exists for truncated inode %lx",
347 (long)inode->i_ino);
348 RFALSE(!truncate &&
349 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
350 "saved link already exists for unlinked inode %lx",
351 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700353 /* setup key of "save" link */
354 key.version = KEY_FORMAT_3_5;
355 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
356 key.on_disk_key.k_objectid = inode->i_ino;
357 if (!truncate) {
358 /* unlink, rmdir, rename */
359 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
360 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700362 /* item head of "safe" link */
363 make_le_item_head(&ih, &key, key.version,
364 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
365 4 /*length */ , 0xffff /*free space */ );
366 } else {
367 /* truncate */
368 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400369 reiserfs_warning(inode->i_sb, "green-2102",
370 "Adding a truncate savelink for "
371 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700372 INODE_PKEY(inode));
373 set_cpu_key_k_offset(&key, 1);
374 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700376 /* item head of "safe" link */
377 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
378 4 /*length */ , 0 /*free space */ );
379 }
380 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700382 /* look for its place in the tree */
383 retval = search_item(inode->i_sb, &key, &path);
384 if (retval != ITEM_NOT_FOUND) {
385 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400386 reiserfs_error(inode->i_sb, "vs-2100",
387 "search_by_key (%K) returned %d", &key,
388 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700389 pathrelse(&path);
390 return;
391 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700393 /* body of "save" link */
394 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700396 /* put "save" link inot tree, don't charge quota to anyone */
397 retval =
398 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
399 if (retval) {
400 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400401 reiserfs_error(inode->i_sb, "vs-2120",
402 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700403 } else {
404 if (truncate)
405 REISERFS_I(inode)->i_flags |=
406 i_link_saved_truncate_mask;
407 else
408 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
409 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410}
411
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700413int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700415 struct reiserfs_transaction_handle th;
416 struct reiserfs_key key;
417 int err;
418
419 /* we are going to do one balancing only */
420 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
421 if (err)
422 return err;
423
424 /* setup key of "save" link */
425 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
426 key.k_objectid = INODE_PKEY(inode)->k_objectid;
427 if (!truncate) {
428 /* unlink, rmdir, rename */
429 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
430 1 + inode->i_sb->s_blocksize);
431 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
432 } else {
433 /* truncate */
434 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
435 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
436 }
437
438 if ((truncate &&
439 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
440 (!truncate &&
441 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
442 /* don't take quota bytes from anywhere */
443 reiserfs_delete_solid_item(&th, NULL, &key);
444 if (!truncate) {
445 reiserfs_release_objectid(&th, inode->i_ino);
446 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
447 } else
448 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
449
450 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451}
452
David Howellsedc666e2006-10-11 01:22:14 -0700453static void reiserfs_kill_sb(struct super_block *s)
454{
455 if (REISERFS_SB(s)) {
456 if (REISERFS_SB(s)->xattr_root) {
457 d_invalidate(REISERFS_SB(s)->xattr_root);
458 dput(REISERFS_SB(s)->xattr_root);
459 REISERFS_SB(s)->xattr_root = NULL;
460 }
David Howellsedc666e2006-10-11 01:22:14 -0700461 if (REISERFS_SB(s)->priv_root) {
462 d_invalidate(REISERFS_SB(s)->priv_root);
463 dput(REISERFS_SB(s)->priv_root);
464 REISERFS_SB(s)->priv_root = NULL;
465 }
466 }
467
468 kill_block_super(s);
469}
470
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700471static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700473 struct reiserfs_transaction_handle th;
474 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400476 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
477
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200478 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200479
Christoph Hellwig8c85e122009-04-28 18:00:26 +0200480 if (s->s_dirt)
481 reiserfs_write_super(s);
482
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700483 /* change file system state to current state if it was mounted with read-write permissions */
484 if (!(s->s_flags & MS_RDONLY)) {
485 if (!journal_begin(&th, s, 10)) {
486 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
487 1);
488 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
489 REISERFS_SB(s)->s_mount_state);
490 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
491 }
492 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700494 /* note, journal_release checks for readonly mount, and can decide not
495 ** to do a journal_end
496 */
497 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
Jeff Mahoney50652272006-09-30 23:28:44 -0700499 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700501 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700503 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700505 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400506 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700507 REISERFS_SB(s)->reserved_blocks);
508 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700510 reiserfs_proc_info_done(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200512 reiserfs_write_unlock(s);
513 mutex_destroy(&REISERFS_SB(s)->lock);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700514 kfree(s->s_fs_info);
515 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516}
517
Christoph Lametere18b8902006-12-06 20:33:20 -0800518static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520static struct inode *reiserfs_alloc_inode(struct super_block *sb)
521{
522 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700523 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800524 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (!ei)
526 return NULL;
Al Viro0e4f6a72010-07-04 12:18:57 +0400527 atomic_set(&ei->openers, 0);
528 mutex_init(&ei->tailpack);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 return &ei->vfs_inode;
530}
531
532static void reiserfs_destroy_inode(struct inode *inode)
533{
534 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
535}
536
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700537static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700539 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
Christoph Lametera35afb82007-05-16 22:10:57 -0700541 INIT_LIST_HEAD(&ei->i_prealloc_list);
542 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700544
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545static int init_inodecache(void)
546{
547 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700548 sizeof(struct
549 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800550 0, (SLAB_RECLAIM_ACCOUNT|
551 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900552 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 if (reiserfs_inode_cachep == NULL)
554 return -ENOMEM;
555 return 0;
556}
557
558static void destroy_inodecache(void)
559{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700560 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561}
562
563/* we don't mark inodes dirty, we just log them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700564static void reiserfs_dirty_inode(struct inode *inode)
565{
566 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700568 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200569 int lock_depth;
570
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700571 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400572 reiserfs_warning(inode->i_sb, "clm-6006",
573 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700574 inode->i_ino);
575 return;
576 }
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200577 lock_depth = reiserfs_write_lock_once(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700579 /* this is really only used for atime updates, so they don't have
580 ** to be included in O_SYNC or fsync
581 */
582 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200583 if (err)
584 goto out;
585
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700586 reiserfs_update_sd(&th, inode);
587 journal_end(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200588
589out:
590 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591}
592
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700594static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
595 size_t, loff_t);
596static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
597 loff_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598#endif
599
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800600static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700601 .alloc_inode = reiserfs_alloc_inode,
602 .destroy_inode = reiserfs_destroy_inode,
603 .write_inode = reiserfs_write_inode,
604 .dirty_inode = reiserfs_dirty_inode,
Al Viro845a2cc2010-06-07 11:37:37 -0400605 .evict_inode = reiserfs_evict_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700606 .put_super = reiserfs_put_super,
607 .write_super = reiserfs_write_super,
608 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800609 .freeze_fs = reiserfs_freeze,
610 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700611 .statfs = reiserfs_statfs,
612 .remount_fs = reiserfs_remount,
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -0800613 .show_options = generic_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700615 .quota_read = reiserfs_quota_read,
616 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617#endif
618};
619
620#ifdef CONFIG_QUOTA
621#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
622
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623static int reiserfs_write_dquot(struct dquot *);
624static int reiserfs_acquire_dquot(struct dquot *);
625static int reiserfs_release_dquot(struct dquot *);
626static int reiserfs_mark_dquot_dirty(struct dquot *);
627static int reiserfs_write_info(struct super_block *, int);
Christoph Hellwig307ae182010-05-19 07:16:43 -0400628static int reiserfs_quota_on(struct super_block *, int, int, char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700630static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700631 .write_dquot = reiserfs_write_dquot,
632 .acquire_dquot = reiserfs_acquire_dquot,
633 .release_dquot = reiserfs_release_dquot,
634 .mark_dirty = reiserfs_mark_dquot_dirty,
635 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100636 .alloc_dquot = dquot_alloc,
637 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638};
639
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700640static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700641 .quota_on = reiserfs_quota_on,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400642 .quota_off = dquot_quota_off,
643 .quota_sync = dquot_quota_sync,
644 .get_info = dquot_get_dqinfo,
645 .set_info = dquot_set_dqinfo,
646 .get_dqblk = dquot_get_dqblk,
647 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648};
649#endif
650
Christoph Hellwig39655162007-10-21 16:42:17 -0700651static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700652 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700653 .fh_to_dentry = reiserfs_fh_to_dentry,
654 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700655 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700656};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
658/* this struct is used in reiserfs_getopt () for containing the value for those
659 mount options that have values rather than being toggles. */
660typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700661 char *value;
662 int setmask; /* bitmask which is to set on mount_options bitmask when this
663 value is found, 0 is no bits are to be changed. */
664 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
665 value is found, 0 is no bits are to be changed. This is
666 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667} arg_desc_t;
668
669/* Set this bit in arg_required to allow empty arguments */
670#define REISERFS_OPT_ALLOWEMPTY 31
671
672/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
673 mount options */
674typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700675 char *option_name;
676 int arg_required; /* 0 if argument is not required, not 0 otherwise */
677 const arg_desc_t *values; /* list of values accepted by an option */
678 int setmask; /* bitmask which is to set on mount_options bitmask when this
679 value is found, 0 is no bits are to be changed. */
680 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
681 value is found, 0 is no bits are to be changed. This is
682 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683} opt_desc_t;
684
685/* possible values for -o data= */
686static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700687 {"ordered", 1 << REISERFS_DATA_ORDERED,
688 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
689 {"journal", 1 << REISERFS_DATA_LOG,
690 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
691 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
692 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800693 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694};
695
696/* possible values for -o barrier= */
697static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700698 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
699 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800700 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701};
702
703/* possible values for "-o block-allocator=" and bits which are to be set in
704 s_mount_opt of reiserfs specific part of in-core super block */
705static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700706 {"noborder", 1 << REISERFS_NO_BORDER, 0},
707 {"border", 0, 1 << REISERFS_NO_BORDER},
708 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
709 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
710 {"test4", 1 << REISERFS_TEST4, 0},
711 {"notest4", 0, 1 << REISERFS_TEST4},
712 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713};
714
715static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700716 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
717 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
718 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
719 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720};
721
722static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700723 {"panic", 1 << REISERFS_ERROR_PANIC,
724 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
725 {"ro-remount", 1 << REISERFS_ERROR_RO,
726 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700728 {"continue", 1 << REISERFS_ERROR_CONTINUE,
729 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700731 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732};
733
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734/* proceed only one option from a list *cur - string containing of mount options
735 opts - array of options which are accepted
736 opt_arg - if option is found and requires an argument and if it is specifed
737 in the input - pointer to the argument is stored here
738 bit_flags - if option requires to set a certain bit - it is set here
739 return -1 if unknown option is found, opt->arg_required otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700740static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
741 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700743 char *p;
Jeff Mahoney0222e652009-03-30 14:02:44 -0400744 /* foo=bar,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700745 ^ ^ ^
746 | | +-- option_end
747 | +-- arg_start
748 +-- option_start
749 */
750 const opt_desc_t *opt;
751 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700753 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700755 /* assume argument cannot contain commas */
756 *cur = strchr(p, ',');
757 if (*cur) {
758 *(*cur) = '\0';
759 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700762 if (!strncmp(p, "alloc=", 6)) {
763 /* Ugly special case, probably we should redo options parser so that
764 it can understand several arguments for some options, also so that
765 it can fill several bitfields with option values. */
766 if (reiserfs_parse_alloc_options(s, p + 6)) {
767 return -1;
768 } else {
769 return 0;
770 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700772
773 /* for every option in the list */
774 for (opt = opts; opt->option_name; opt++) {
775 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
776 if (bit_flags) {
777 if (opt->clrmask ==
778 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400779 reiserfs_warning(s, "super-6500",
780 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700781 p);
782 else
783 *bit_flags &= ~opt->clrmask;
784 if (opt->setmask ==
785 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400786 reiserfs_warning(s, "super-6501",
787 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700788 p);
789 else
790 *bit_flags |= opt->setmask;
791 }
792 break;
793 }
794 }
795 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400796 reiserfs_warning(s, "super-6502",
797 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700798 return -1;
799 }
800
801 p += strlen(opt->option_name);
802 switch (*p) {
803 case '=':
804 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400805 reiserfs_warning(s, "super-6503",
806 "the option \"%s\" does not "
807 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700808 opt->option_name);
809 return -1;
810 }
811 break;
812
813 case 0:
814 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400815 reiserfs_warning(s, "super-6504",
816 "the option \"%s\" requires an "
817 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700818 return -1;
819 }
820 break;
821 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400822 reiserfs_warning(s, "super-6505",
823 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700824 opt->option_name);
825 return -1;
826 }
827
828 /* move to the argument, or to next option if argument is not required */
829 p++;
830
831 if (opt->arg_required
832 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
833 && !strlen(p)) {
834 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400835 reiserfs_warning(s, "super-6506",
836 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700837 opt->option_name);
838 return -1;
839 }
840
841 if (!opt->values) {
842 /* *=NULLopt_arg contains pointer to argument */
843 *opt_arg = p;
844 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
845 }
846
847 /* values possible for this option are listed in opt->values */
848 for (arg = opt->values; arg->value; arg++) {
849 if (!strcmp(p, arg->value)) {
850 if (bit_flags) {
851 *bit_flags &= ~arg->clrmask;
852 *bit_flags |= arg->setmask;
853 }
854 return opt->arg_required;
855 }
856 }
857
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400858 reiserfs_warning(s, "super-6506",
859 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700860 opt->option_name);
861 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862}
863
864/* returns 0 if something is wrong in option string, 1 - otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700865static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
866 unsigned long *mount_options,
867 /* after the parsing phase, contains the
868 collection of bitflags defining what
869 mount options were selected. */
870 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
871 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -0700872 unsigned int *commit_max_age,
873 char **qf_names,
874 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700876 int c;
877 char *arg = NULL;
878 char *pos;
879 opt_desc_t opts[] = {
880 /* Compatibility stuff, so that -o notail for old setups still work */
881 {"tails",.arg_required = 't',.values = tails},
882 {"notail",.clrmask =
883 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
884 {"conv",.setmask = 1 << REISERFS_CONVERT},
885 {"attrs",.setmask = 1 << REISERFS_ATTRS},
886 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -0400887 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700889 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
890 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700892 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
893 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894#endif
895#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700896 {"acl",.setmask = 1 << REISERFS_POSIXACL},
897 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700899 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
900 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800902 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700903 {"replayonly",.setmask = 1 << REPLAYONLY},
904 {"block-allocator",.arg_required = 'a',.values = balloc},
905 {"data",.arg_required = 'd',.values = logging_mode},
906 {"barrier",.arg_required = 'b',.values = barrier_mode},
907 {"resize",.arg_required = 'r',.values = NULL},
908 {"jdev",.arg_required = 'j',.values = NULL},
909 {"nolargeio",.arg_required = 'w',.values = NULL},
910 {"commit",.arg_required = 'c',.values = NULL},
911 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
912 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
913 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
914 {"errors",.arg_required = 'e',.values = error_actions},
915 {"usrjquota",.arg_required =
916 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
917 {"grpjquota",.arg_required =
918 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
919 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800920 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700921 };
922
923 *blocks = 0;
924 if (!options || !*options)
925 /* use default configuration: create tails, journaling on, no
926 conversion to newest format */
927 return 1;
928
929 for (pos = options; pos;) {
930 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
931 if (c == -1)
932 /* wrong option is given */
933 return 0;
934
935 if (c == 'r') {
936 char *p;
937
938 p = NULL;
939 /* "resize=NNN" or "resize=auto" */
940
941 if (!strcmp(arg, "auto")) {
942 /* From JFS code, to auto-get the size. */
943 *blocks =
944 s->s_bdev->bd_inode->i_size >> s->
945 s_blocksize_bits;
946 } else {
947 *blocks = simple_strtoul(arg, &p, 0);
948 if (*p != '\0') {
949 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400950 reiserfs_warning(s, "super-6507",
951 "bad value %s for "
952 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700953 return 0;
954 }
955 }
956 }
957
958 if (c == 'c') {
959 char *p = NULL;
960 unsigned long val = simple_strtoul(arg, &p, 0);
961 /* commit=NNN (time in seconds) */
962 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400963 reiserfs_warning(s, "super-6508",
964 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700965 arg);
966 return 0;
967 }
968 *commit_max_age = (unsigned int)val;
969 }
970
971 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400972 reiserfs_warning(s, "super-6509", "nolargeio option "
973 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -0700974 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700975 }
976
977 if (c == 'j') {
978 if (arg && *arg && jdev_name) {
979 if (*jdev_name) { //Hm, already assigned?
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400980 reiserfs_warning(s, "super-6510",
981 "journal device was "
982 "already specified to "
983 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700984 return 0;
985 }
986 *jdev_name = arg;
987 }
988 }
989#ifdef CONFIG_QUOTA
990 if (c == 'u' || c == 'g') {
991 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
992
Jan Kara6929f892008-08-20 18:16:36 +0200993 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -0700994 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400995 reiserfs_warning(s, "super-6511",
996 "cannot change journaled "
997 "quota options when quota "
998 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700999 return 0;
1000 }
1001 if (*arg) { /* Some filename specified? */
1002 if (REISERFS_SB(s)->s_qf_names[qtype]
1003 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1004 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001005 reiserfs_warning(s, "super-6512",
1006 "%s quota file "
1007 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001008 QTYPE2NAME(qtype));
1009 return 0;
1010 }
1011 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001012 reiserfs_warning(s, "super-6513",
1013 "quotafile must be "
1014 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001015 return 0;
1016 }
Jan Kara00b44192008-07-25 01:46:38 -07001017 qf_names[qtype] =
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001018 kmalloc(strlen(arg) + 1, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001019 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001020 reiserfs_warning(s, "reiserfs-2502",
1021 "not enough memory "
1022 "for storing "
1023 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001024 return 0;
1025 }
Jan Kara00b44192008-07-25 01:46:38 -07001026 strcpy(qf_names[qtype], arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001027 *mount_options |= 1 << REISERFS_QUOTA;
1028 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001029 if (qf_names[qtype] !=
1030 REISERFS_SB(s)->s_qf_names[qtype])
1031 kfree(qf_names[qtype]);
1032 qf_names[qtype] = NULL;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001033 }
1034 }
1035 if (c == 'f') {
1036 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001037 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001038 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001039 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001040 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001041 reiserfs_warning(s, "super-6514",
1042 "unknown quota format "
1043 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001044 return 0;
1045 }
Jan Kara6929f892008-08-20 18:16:36 +02001046 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001047 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001048 reiserfs_warning(s, "super-6515",
1049 "cannot change journaled "
1050 "quota options when quota "
1051 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001052 return 0;
1053 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001054 }
1055#else
1056 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001057 reiserfs_warning(s, "reiserfs-2503", "journaled "
1058 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001059 return 0;
1060 }
1061#endif
1062 }
1063
1064#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001065 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1066 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001067 reiserfs_warning(s, "super-6515",
1068 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001069 return 0;
1070 }
1071 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1072 if (!(*mount_options & (1 << REISERFS_QUOTA))
Jan Kara6929f892008-08-20 18:16:36 +02001073 && sb_any_quota_loaded(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001074 reiserfs_warning(s, "super-6516", "quota options must "
1075 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001076 return 0;
1077 }
1078#endif
1079
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081}
1082
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001083static void switch_data_mode(struct super_block *s, unsigned long mode)
1084{
1085 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1086 (1 << REISERFS_DATA_ORDERED) |
1087 (1 << REISERFS_DATA_WRITEBACK));
1088 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089}
1090
1091static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1092{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001093 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1094 if (!reiserfs_data_log(s)) {
1095 switch_data_mode(s, REISERFS_DATA_LOG);
1096 reiserfs_info(s, "switching to journaled data mode\n");
1097 }
1098 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1099 if (!reiserfs_data_ordered(s)) {
1100 switch_data_mode(s, REISERFS_DATA_ORDERED);
1101 reiserfs_info(s, "switching to ordered data mode\n");
1102 }
1103 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1104 if (!reiserfs_data_writeback(s)) {
1105 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1106 reiserfs_info(s, "switching to writeback data mode\n");
1107 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109}
1110
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001111static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001113 int flush = (1 << REISERFS_BARRIER_FLUSH);
1114 int none = (1 << REISERFS_BARRIER_NONE);
1115 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001117 if (bits & all_barrier) {
1118 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1119 if (bits & flush) {
1120 REISERFS_SB(s)->s_mount_opt |= flush;
1121 printk("reiserfs: enabling write barrier flush mode\n");
1122 } else if (bits & none) {
1123 REISERFS_SB(s)->s_mount_opt |= none;
1124 printk("reiserfs: write barriers turned off\n");
1125 }
1126 }
1127}
1128
1129static void handle_attrs(struct super_block *s)
1130{
1131 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1132
1133 if (reiserfs_attrs(s)) {
1134 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001135 reiserfs_warning(s, "super-6517", "cannot support "
1136 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001137 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 return;
1139 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001140 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001141 reiserfs_warning(s, "super-6518", "cannot support "
1142 "attributes until flag is set in "
1143 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001144 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 }
1146 }
1147}
1148
Jan Kara00b44192008-07-25 01:46:38 -07001149#ifdef CONFIG_QUOTA
1150static void handle_quota_files(struct super_block *s, char **qf_names,
1151 unsigned int *qfmt)
1152{
1153 int i;
1154
1155 for (i = 0; i < MAXQUOTAS; i++) {
1156 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1157 kfree(REISERFS_SB(s)->s_qf_names[i]);
1158 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1159 }
1160 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1161}
1162#endif
1163
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001164static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001166 struct reiserfs_super_block *rs;
1167 struct reiserfs_transaction_handle th;
1168 unsigned long blocks;
1169 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1170 unsigned long safe_mask = 0;
1171 unsigned int commit_max_age = (unsigned int)-1;
1172 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001173 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001174 int err;
Jan Kara00b44192008-07-25 01:46:38 -07001175 char *qf_names[MAXQUOTAS];
1176 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001178 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001179#endif
Jan Kara00b44192008-07-25 01:46:38 -07001180
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001181 reiserfs_write_lock(s);
1182
1183#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001184 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185#endif
1186
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001187 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001189 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001190 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1191 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001193 for (i = 0; i < MAXQUOTAS; i++)
1194 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1195 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001196#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001197 err = -EINVAL;
1198 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 }
Jan Kara00b44192008-07-25 01:46:38 -07001200#ifdef CONFIG_QUOTA
1201 handle_quota_files(s, qf_names, &qfmt);
1202#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001204 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001206 /* Add options that are safe here */
1207 safe_mask |= 1 << REISERFS_SMALLTAIL;
1208 safe_mask |= 1 << REISERFS_LARGETAIL;
1209 safe_mask |= 1 << REISERFS_NO_BORDER;
1210 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1211 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1212 safe_mask |= 1 << REISERFS_TEST4;
1213 safe_mask |= 1 << REISERFS_ATTRS;
1214 safe_mask |= 1 << REISERFS_XATTRS_USER;
1215 safe_mask |= 1 << REISERFS_POSIXACL;
1216 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1217 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1218 safe_mask |= 1 << REISERFS_ERROR_RO;
1219 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1220 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1221 safe_mask |= 1 << REISERFS_QUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001223 /* Update the bitmask, taking care to keep
1224 * the bits we're not allowed to change here */
1225 REISERFS_SB(s)->s_mount_opt =
1226 (REISERFS_SB(s)->
1227 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001229 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1230 journal->j_max_commit_age = commit_max_age;
1231 journal->j_max_trans_age = commit_max_age;
1232 } else if (commit_max_age == 0) {
1233 /* 0 means restore defaults. */
1234 journal->j_max_commit_age = journal->j_default_max_commit_age;
1235 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1236 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001238 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001239 err = reiserfs_resize(s, blocks);
1240 if (err != 0)
1241 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001242 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001244 if (*mount_flags & MS_RDONLY) {
1245 reiserfs_xattr_init(s, *mount_flags);
1246 /* remount read-only */
1247 if (s->s_flags & MS_RDONLY)
1248 /* it is read-only already */
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001249 goto out_ok;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001250
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001251 err = dquot_suspend(s, -1);
1252 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001253 goto out_err;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001254
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001255 /* try to remount file system with read-only permissions */
1256 if (sb_umount_state(rs) == REISERFS_VALID_FS
1257 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001258 goto out_ok;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001259 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001261 err = journal_begin(&th, s, 10);
1262 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001263 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001265 /* Mounting a rw partition read-only. */
1266 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1267 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1268 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1269 } else {
1270 /* remount read-write */
1271 if (!(s->s_flags & MS_RDONLY)) {
1272 reiserfs_xattr_init(s, *mount_flags);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001273 goto out_ok; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001274 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001276 if (reiserfs_is_journal_aborted(journal)) {
1277 err = journal->j_errno;
1278 goto out_err;
1279 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001281 handle_data_mode(s, mount_options);
1282 handle_barrier_mode(s, mount_options);
1283 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1284 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1285 err = journal_begin(&th, s, 10);
1286 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001287 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001289 /* Mount a partition which is read-only, read-write */
1290 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1291 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1292 s->s_flags &= ~MS_RDONLY;
1293 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001294 if (!old_format_only(s))
1295 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001296 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1297 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1298 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1299 }
1300 /* this will force a full flush of all journal lists */
1301 SB_JOURNAL(s)->j_must_wait = 1;
1302 err = journal_end(&th, s, 10);
1303 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001304 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001305 s->s_dirt = 0;
1306
1307 if (!(*mount_flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001308 dquot_resume(s, -1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001309 finish_unfinished(s);
1310 reiserfs_xattr_init(s, *mount_flags);
1311 }
1312
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001313out_ok:
Al Viro2a32ceb2009-05-08 16:05:57 -04001314 replace_mount_options(s, new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001315 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001316 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001317
1318out_err:
1319 kfree(new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001320 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001321 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322}
1323
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001324static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001326 struct buffer_head *bh;
1327 struct reiserfs_super_block *rs;
1328 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001330 bh = sb_bread(s, offset / s->s_blocksize);
1331 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001332 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001333 "bread failed (dev %s, block %lu, size %lu)",
1334 reiserfs_bdevname(s), offset / s->s_blocksize,
1335 s->s_blocksize);
1336 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001339 rs = (struct reiserfs_super_block *)bh->b_data;
1340 if (!is_any_reiserfs_magic_string(rs)) {
1341 brelse(bh);
1342 return 1;
1343 }
1344 //
1345 // ok, reiserfs signature (old or new) found in at the given offset
Jeff Mahoney0222e652009-03-30 14:02:44 -04001346 //
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001347 fs_blocksize = sb_blocksize(rs);
1348 brelse(bh);
1349 sb_set_blocksize(s, fs_blocksize);
1350
1351 bh = sb_bread(s, offset / s->s_blocksize);
1352 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001353 reiserfs_warning(s, "sh-2007",
1354 "bread failed (dev %s, block %lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001355 reiserfs_bdevname(s), offset / s->s_blocksize,
1356 s->s_blocksize);
1357 return 1;
1358 }
1359
1360 rs = (struct reiserfs_super_block *)bh->b_data;
1361 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001362 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1363 "filesystem on (dev %s, block %Lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001364 reiserfs_bdevname(s),
1365 (unsigned long long)bh->b_blocknr,
1366 s->s_blocksize);
1367 brelse(bh);
1368 return 1;
1369 }
1370
1371 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1372 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001373 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1374 "--rebuild-tree run detected. Please run\n"
1375 "reiserfsck --rebuild-tree and wait for a "
1376 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001377 "get newer reiserfsprogs package");
1378 return 1;
1379 }
1380
1381 SB_BUFFER_WITH_SB(s) = bh;
1382 SB_DISK_SUPER_BLOCK(s) = rs;
1383
1384 if (is_reiserfs_jr(rs)) {
1385 /* magic is of non-standard journal filesystem, look at s_version to
1386 find which format is in use */
1387 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001388 reiserfs_info(s, "found reiserfs format \"3.6\""
1389 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001390 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001391 reiserfs_info(s, "found reiserfs format \"3.5\""
1392 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001393 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001394 reiserfs_warning(s, "sh-2012", "found unknown "
1395 "format \"%u\" of reiserfs with "
1396 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001397 return 1;
1398 }
1399 } else
1400 /* s_version of standard format may contain incorrect information,
1401 so we just look at the magic string */
1402 reiserfs_info(s,
1403 "found reiserfs format \"%s\" with standard journal\n",
1404 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1405
1406 s->s_op = &reiserfs_sops;
1407 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001409 s->s_qcop = &reiserfs_qctl_operations;
1410 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411#endif
1412
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001413 /* new format is limited by the 32 bit wide i_blocks field, want to
1414 ** be one full block below that.
1415 */
1416 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1417 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418}
1419
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001421static int reread_meta_blocks(struct super_block *s)
1422{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001423 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001424 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001425 wait_on_buffer(SB_BUFFER_WITH_SB(s));
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001426 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001427 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001428 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001429 return 1;
1430 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001432 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433}
1434
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435/////////////////////////////////////////////////////
1436// hash detection stuff
1437
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438// if root directory is empty - we set default - Yura's - hash and
1439// warn about it
1440// FIXME: we look for only one name in a directory. If tea and yura
1441// bith have the same value - we ask user to send report to the
1442// mailing list
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001443static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001445 int retval;
1446 struct inode *inode;
1447 struct cpu_key key;
1448 INITIALIZE_PATH(path);
1449 struct reiserfs_dir_entry de;
1450 __u32 hash = DEFAULT_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001452 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001454 do { // Some serious "goto"-hater was there ;)
1455 u32 teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001457 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1458 retval = search_by_entry_key(s, &key, &path, &de);
1459 if (retval == IO_ERROR) {
1460 pathrelse(&path);
1461 return UNSET_HASH;
1462 }
1463 if (retval == NAME_NOT_FOUND)
1464 de.de_entry_num--;
1465 set_de_name_and_namelen(&de);
1466 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1467 /* allow override in this case */
1468 if (reiserfs_rupasov_hash(s)) {
1469 hash = YURA_HASH;
1470 }
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001471 reiserfs_info(s, "FS seems to be empty, autodetect "
1472 "is using the default hash\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001473 break;
1474 }
1475 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1476 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1477 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1478 if (((teahash == r5hash)
1479 &&
1480 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1481 == r5hash)) || ((teahash == yurahash)
1482 && (yurahash ==
1483 GET_HASH_VALUE(deh_offset
1484 (&
1485 (de.
1486 de_deh[de.
1487 de_entry_num])))))
1488 || ((r5hash == yurahash)
1489 && (yurahash ==
1490 GET_HASH_VALUE(deh_offset
1491 (&(de.de_deh[de.de_entry_num])))))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001492 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1493 "automatically detect hash function. "
1494 "Please mount with -o "
1495 "hash={tea,rupasov,r5}");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001496 hash = UNSET_HASH;
1497 break;
1498 }
1499 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1500 yurahash)
1501 hash = YURA_HASH;
1502 else if (GET_HASH_VALUE
1503 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1504 hash = TEA_HASH;
1505 else if (GET_HASH_VALUE
1506 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1507 hash = R5_HASH;
1508 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001509 reiserfs_warning(s, "reiserfs-2506",
1510 "Unrecognised hash function");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001511 hash = UNSET_HASH;
1512 }
1513 } while (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001515 pathrelse(&path);
1516 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517}
1518
1519// finds out which hash names are sorted with
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001520static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001522 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001524 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001526 /* reiserfs_hash_detect() == true if any of the hash mount options
1527 ** were used. We must check them to make sure the user isn't
1528 ** using a bad hash value
1529 */
1530 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1531 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001533 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney0222e652009-03-30 14:02:44 -04001534 /* detection has found the hash, and we must check against the
1535 ** mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001536 */
1537 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001538 reiserfs_warning(s, "reiserfs-2507",
1539 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001540 "unable to force rupasov hash",
1541 reiserfs_hashname(code));
1542 code = UNSET_HASH;
1543 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001544 reiserfs_warning(s, "reiserfs-2508",
1545 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001546 "unable to force tea hash",
1547 reiserfs_hashname(code));
1548 code = UNSET_HASH;
1549 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001550 reiserfs_warning(s, "reiserfs-2509",
1551 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001552 "unable to force r5 hash",
1553 reiserfs_hashname(code));
1554 code = UNSET_HASH;
1555 }
1556 } else {
1557 /* find_hash_out was not called or could not determine the hash */
1558 if (reiserfs_rupasov_hash(s)) {
1559 code = YURA_HASH;
1560 } else if (reiserfs_tea_hash(s)) {
1561 code = TEA_HASH;
1562 } else if (reiserfs_r5_hash(s)) {
1563 code = R5_HASH;
1564 }
1565 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566
Jeff Mahoney0222e652009-03-30 14:02:44 -04001567 /* if we are mounted RW, and we have a new valid hash code, update
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001568 ** the super
1569 */
1570 if (code != UNSET_HASH &&
1571 !(s->s_flags & MS_RDONLY) &&
1572 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1573 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1574 }
1575 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576}
1577
1578// return pointer to appropriate function
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001579static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001581 switch (what_hash(s)) {
1582 case TEA_HASH:
1583 reiserfs_info(s, "Using tea hash to sort names\n");
1584 return keyed_hash;
1585 case YURA_HASH:
1586 reiserfs_info(s, "Using rupasov hash to sort names\n");
1587 return yura_hash;
1588 case R5_HASH:
1589 reiserfs_info(s, "Using r5 hash to sort names\n");
1590 return r5_hash;
1591 }
1592 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593}
1594
1595// this is used to set up correct value for old partitions
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001596static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001598 if (func == keyed_hash)
1599 return TEA_HASH;
1600 if (func == yura_hash)
1601 return YURA_HASH;
1602 if (func == r5_hash)
1603 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001605 BUG(); // should never happen
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001607 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608}
1609
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001610#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001612 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001614static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001616 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001617 struct reiserfs_transaction_handle th;
1618 int old_format = 0;
1619 unsigned long blocks;
1620 unsigned int commit_max_age = 0;
1621 int jinit_done = 0;
1622 struct reiserfs_iget_args args;
1623 struct reiserfs_super_block *rs;
1624 char *jdev_name;
1625 struct reiserfs_sb_info *sbi;
1626 int errval = -EINVAL;
Jan Kara00b44192008-07-25 01:46:38 -07001627 char *qf_names[MAXQUOTAS] = {};
1628 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001630 save_mount_options(s, data);
1631
Yan Burman01afb212006-12-06 20:39:01 -08001632 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001633 if (!sbi)
1634 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001635 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001636 /* Set default values for options: non-aggressive tails, RO on errors */
1637 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1638 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1639 /* no preallocation minimum, be smart in
1640 reiserfs_file_write instead */
1641 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1642 /* Preallocate by 16 blocks (17-1) at once */
1643 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001644 /* setup default block allocator options */
1645 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001647 mutex_init(&REISERFS_SB(s)->lock);
1648 REISERFS_SB(s)->lock_depth = -1;
1649
1650 /*
1651 * This function is called with the bkl, which also was the old
1652 * locking used here.
1653 * do_journal_begin() will soon check if we hold the lock (ie: was the
1654 * bkl). This is likely because do_journal_begin() has several another
1655 * callers because at this time, it doesn't seem to be necessary to
1656 * protect against anything.
1657 * Anyway, let's be conservative and lock for now.
1658 */
1659 reiserfs_write_lock(s);
1660
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001661 jdev_name = NULL;
1662 if (reiserfs_parse_options
1663 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001664 &commit_max_age, qf_names, &qfmt) == 0) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001665 goto error;
1666 }
Jan Kara00b44192008-07-25 01:46:38 -07001667#ifdef CONFIG_QUOTA
1668 handle_quota_files(s, qf_names, &qfmt);
1669#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001671 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001672 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001673 goto error;
1674 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001676 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1677 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1678 old_format = 1;
1679 /* try new format (64-th 1k block), which can contain reiserfs super block */
1680 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001681 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001682 reiserfs_bdevname(s));
1683 goto error;
1684 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001686 rs = SB_DISK_SUPER_BLOCK(s);
1687 /* Let's do basic sanity check to verify that underlying device is not
1688 smaller than the filesystem. If the check fails then abort and scream,
1689 because bad stuff will happen otherwise. */
1690 if (s->s_bdev && s->s_bdev->bd_inode
1691 && i_size_read(s->s_bdev->bd_inode) <
1692 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001693 SWARN(silent, s, "", "Filesystem cannot be "
1694 "mounted because it is bigger than the device");
1695 SWARN(silent, s, "", "You may need to run fsck "
1696 "or increase size of your LVM partition");
1697 SWARN(silent, s, "", "Or may be you forgot to "
1698 "reboot after fdisk when it told you to");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001699 goto error;
1700 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001702 sbi->s_mount_state = SB_REISERFS_STATE(s);
1703 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
Jeff Mahoney6f010462006-09-30 23:28:43 -07001705 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001706 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001707 goto error;
1708 }
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001709 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001711 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1712 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713#endif
1714
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001715 /* make data=ordered the default */
1716 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1717 !reiserfs_data_writeback(s)) {
1718 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 }
1720
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001721 if (reiserfs_data_log(s)) {
1722 reiserfs_info(s, "using journaled data mode\n");
1723 } else if (reiserfs_data_ordered(s)) {
1724 reiserfs_info(s, "using ordered data mode\n");
1725 } else {
1726 reiserfs_info(s, "using writeback data mode\n");
1727 }
1728 if (reiserfs_barrier_flush(s)) {
1729 printk("reiserfs: using flush barriers\n");
1730 }
1731 // set_device_ro(s->s_dev, 1) ;
1732 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001733 SWARN(silent, s, "sh-2022",
1734 "unable to initialize journal space");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001735 goto error;
1736 } else {
1737 jinit_done = 1; /* once this is set, journal_release must be called
1738 ** if we error out of the mount
1739 */
1740 }
1741 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001742 SWARN(silent, s, "jmacd-9",
1743 "unable to reread meta blocks after journal init");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001744 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 }
1746
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001747 if (replay_only(s))
1748 goto error;
1749
1750 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001751 SWARN(silent, s, "clm-7000",
1752 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001753 s->s_flags |= MS_RDONLY;
1754 }
1755 args.objectid = REISERFS_ROOT_OBJECTID;
1756 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1757 root_inode =
1758 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1759 reiserfs_init_locked_inode, (void *)(&args));
1760 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001761 SWARN(silent, s, "jmacd-10", "get root inode failed");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001762 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763 }
1764
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001765 if (root_inode->i_state & I_NEW) {
1766 reiserfs_read_locked_inode(root_inode, &args);
1767 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 }
1769
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001770 s->s_root = d_alloc_root(root_inode);
1771 if (!s->s_root) {
1772 iput(root_inode);
1773 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001775 // define and initialize hash function
1776 sbi->s_hash_function = hash_function(s);
1777 if (sbi->s_hash_function == NULL) {
1778 dput(s->s_root);
1779 s->s_root = NULL;
1780 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001782
1783 if (is_reiserfs_3_5(rs)
1784 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1785 set_bit(REISERFS_3_5, &(sbi->s_properties));
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07001786 else if (old_format)
1787 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001788 else
1789 set_bit(REISERFS_3_6, &(sbi->s_properties));
1790
1791 if (!(s->s_flags & MS_RDONLY)) {
1792
1793 errval = journal_begin(&th, s, 1);
1794 if (errval) {
1795 dput(s->s_root);
1796 s->s_root = NULL;
1797 goto error;
1798 }
1799 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1800
1801 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1802 set_sb_fs_state(rs, 0);
1803
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001804 /* Clear out s_bmap_nr if it would wrap. We can handle this
1805 * case, but older revisions can't. This will cause the
1806 * file system to fail mount on those older implementations,
1807 * avoiding corruption. -jeffm */
1808 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1809 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001810 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001811 "claims to use %u bitmap blocks in "
1812 "its super block, but requires %u. "
1813 "Clearing to zero.", sb_bmap_nr(rs),
1814 reiserfs_bmap_count(s));
1815
1816 set_sb_bmap_nr(rs, 0);
1817 }
1818
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001819 if (old_format_only(s)) {
1820 /* filesystem of format 3.5 either with standard or non-standard
1821 journal */
1822 if (convert_reiserfs(s)) {
1823 /* and -o conv is given */
1824 if (!silent)
1825 reiserfs_info(s,
1826 "converting 3.5 filesystem to the 3.6 format");
1827
1828 if (is_reiserfs_3_5(rs))
1829 /* put magic string of 3.6 format. 2.2 will not be able to
1830 mount this filesystem anymore */
1831 memcpy(rs->s_v1.s_magic,
1832 reiserfs_3_6_magic_string,
1833 sizeof
1834 (reiserfs_3_6_magic_string));
1835
1836 set_sb_version(rs, REISERFS_VERSION_2);
1837 reiserfs_convert_objectid_map_v1(s);
1838 set_bit(REISERFS_3_6, &(sbi->s_properties));
1839 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1840 } else if (!silent) {
1841 reiserfs_info(s, "using 3.5.x disk format\n");
1842 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001843 } else
1844 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1845
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001846
1847 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1848 errval = journal_end(&th, s, 1);
1849 if (errval) {
1850 dput(s->s_root);
1851 s->s_root = NULL;
1852 goto error;
1853 }
1854
Al Viroedcc37a2009-05-03 06:00:05 -04001855 if ((errval = reiserfs_lookup_privroot(s)) ||
1856 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001857 dput(s->s_root);
1858 s->s_root = NULL;
1859 goto error;
1860 }
1861
1862 /* look for files which were to be removed in previous session */
1863 finish_unfinished(s);
1864 } else {
1865 if (old_format_only(s) && !silent) {
1866 reiserfs_info(s, "using 3.5.x disk format\n");
1867 }
1868
Al Viroedcc37a2009-05-03 06:00:05 -04001869 if ((errval = reiserfs_lookup_privroot(s)) ||
1870 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001871 dput(s->s_root);
1872 s->s_root = NULL;
1873 goto error;
1874 }
1875 }
1876 // mark hash in super block: it could be unset. overwrite should be ok
1877 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1878
1879 handle_attrs(s);
1880
1881 reiserfs_proc_info_init(s);
1882
1883 init_waitqueue_head(&(sbi->s_wait));
1884 spin_lock_init(&sbi->bitmap_lock);
1885
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001886 reiserfs_write_unlock(s);
1887
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001888 return (0);
1889
Jan Kara00b44192008-07-25 01:46:38 -07001890error:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001891 if (jinit_done) { /* kill the commit thread, free journal ram */
1892 journal_release_error(NULL, s);
1893 }
Jeff Mahoney50652272006-09-30 23:28:44 -07001894
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001895 reiserfs_write_unlock(s);
1896
Jeff Mahoney50652272006-09-30 23:28:44 -07001897 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001898 if (SB_BUFFER_WITH_SB(s))
1899 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07001901 {
1902 int j;
Jan Kara00b44192008-07-25 01:46:38 -07001903 for (j = 0; j < MAXQUOTAS; j++)
1904 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001905 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906#endif
James Lamanna833d3042005-10-30 15:00:16 -08001907 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001909 s->s_fs_info = NULL;
1910 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911}
1912
David Howells726c3342006-06-23 02:02:58 -07001913static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914{
David Howells726c3342006-06-23 02:02:58 -07001915 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001916
1917 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1918 buf->f_bfree = sb_free_blocks(rs);
1919 buf->f_bavail = buf->f_bfree;
1920 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07001921 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001922 /* changed to accommodate gcc folks. */
1923 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07001924 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
1925 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
1926 sizeof(rs->s_uuid)/2);
1927
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001928 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929}
1930
1931#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932static int reiserfs_write_dquot(struct dquot *dquot)
1933{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001934 struct reiserfs_transaction_handle th;
1935 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001937 reiserfs_write_lock(dquot->dq_sb);
1938 ret =
1939 journal_begin(&th, dquot->dq_sb,
1940 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1941 if (ret)
1942 goto out;
1943 ret = dquot_commit(dquot);
1944 err =
1945 journal_end(&th, dquot->dq_sb,
1946 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1947 if (!ret && err)
1948 ret = err;
1949 out:
1950 reiserfs_write_unlock(dquot->dq_sb);
1951 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952}
1953
1954static int reiserfs_acquire_dquot(struct dquot *dquot)
1955{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001956 struct reiserfs_transaction_handle th;
1957 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001959 reiserfs_write_lock(dquot->dq_sb);
1960 ret =
1961 journal_begin(&th, dquot->dq_sb,
1962 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1963 if (ret)
1964 goto out;
1965 ret = dquot_acquire(dquot);
1966 err =
1967 journal_end(&th, dquot->dq_sb,
1968 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1969 if (!ret && err)
1970 ret = err;
1971 out:
1972 reiserfs_write_unlock(dquot->dq_sb);
1973 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974}
1975
1976static int reiserfs_release_dquot(struct dquot *dquot)
1977{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001978 struct reiserfs_transaction_handle th;
1979 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001981 reiserfs_write_lock(dquot->dq_sb);
1982 ret =
1983 journal_begin(&th, dquot->dq_sb,
1984 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara9c3013e2007-09-11 15:23:29 -07001985 if (ret) {
1986 /* Release dquot anyway to avoid endless cycle in dqput() */
1987 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001988 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07001989 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001990 ret = dquot_release(dquot);
1991 err =
1992 journal_end(&th, dquot->dq_sb,
1993 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1994 if (!ret && err)
1995 ret = err;
1996 out:
1997 reiserfs_write_unlock(dquot->dq_sb);
1998 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999}
2000
2001static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2002{
Jan Kara45065672008-07-25 01:46:37 -07002003 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002004 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2005 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2006 dquot_mark_dquot_dirty(dquot);
2007 return reiserfs_write_dquot(dquot);
2008 } else
2009 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002010}
2011
2012static int reiserfs_write_info(struct super_block *sb, int type)
2013{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002014 struct reiserfs_transaction_handle th;
2015 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002017 /* Data block + inode block */
2018 reiserfs_write_lock(sb);
2019 ret = journal_begin(&th, sb, 2);
2020 if (ret)
2021 goto out;
2022 ret = dquot_commit_info(sb, type);
2023 err = journal_end(&th, sb, 2);
2024 if (!ret && err)
2025 ret = err;
2026 out:
2027 reiserfs_write_unlock(sb);
2028 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029}
2030
2031/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002032 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 */
2034static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2035{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002036 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2037 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038}
2039
2040/*
2041 * Standard function to be called on quota_on
2042 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002043static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Christoph Hellwig307ae182010-05-19 07:16:43 -04002044 char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002046 int err;
Al Viro82646132008-08-02 00:57:06 -04002047 struct path path;
Jan Karad5dee5c2008-04-28 02:16:23 -07002048 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002049 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002051 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2052 return -EINVAL;
Christoph Hellwig307ae182010-05-19 07:16:43 -04002053
Al Viro82646132008-08-02 00:57:06 -04002054 err = kern_path(name, LOOKUP_FOLLOW, &path);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002055 if (err)
2056 return err;
2057 /* Quotafile not on the same filesystem? */
Al Viro82646132008-08-02 00:57:06 -04002058 if (path.mnt->mnt_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002059 err = -EXDEV;
2060 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002061 }
Al Viro82646132008-08-02 00:57:06 -04002062 inode = path.dentry->d_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002063 /* We must not pack tails for quota files on reiserfs for quota IO to work */
Jan Karad5dee5c2008-04-28 02:16:23 -07002064 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2065 err = reiserfs_unpack(inode, NULL);
2066 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002067 reiserfs_warning(sb, "super-6520",
2068 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002069 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002070 err = -EINVAL;
2071 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002072 }
2073 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002074 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002075 /* Journaling quota? */
2076 if (REISERFS_SB(sb)->s_qf_names[type]) {
2077 /* Quotafile not of fs root? */
Al Viro82646132008-08-02 00:57:06 -04002078 if (path.dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002079 reiserfs_warning(sb, "super-6521",
2080 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002081 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002082 }
2083
2084 /*
2085 * When we journal data on quota file, we have to flush journal to see
2086 * all updates to the file when we bypass pagecache...
2087 */
2088 if (reiserfs_file_data_log(inode)) {
2089 /* Just start temporary transaction and finish it */
2090 err = journal_begin(&th, sb, 1);
2091 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002092 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002093 err = journal_end_sync(&th, sb, 1);
2094 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002095 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002096 }
Christoph Hellwig287a8092010-05-19 07:16:45 -04002097 err = dquot_quota_on_path(sb, type, format_id, &path);
Al Viro77e69da2008-08-01 04:29:18 -04002098out:
Al Viro82646132008-08-02 00:57:06 -04002099 path_put(&path);
Al Viro77e69da2008-08-01 04:29:18 -04002100 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101}
2102
2103/* Read data from quotafile - avoid pagecache and such because we cannot afford
2104 * acquiring the locks... As quota files are never truncated and quota code
2105 * itself serializes the operations (and noone else should touch the files)
2106 * we don't have to be afraid of races */
2107static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2108 size_t len, loff_t off)
2109{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002110 struct inode *inode = sb_dqopt(sb)->files[type];
2111 unsigned long blk = off >> sb->s_blocksize_bits;
2112 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2113 size_t toread;
2114 struct buffer_head tmp_bh, *bh;
2115 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002117 if (off > i_size)
2118 return 0;
2119 if (off + len > i_size)
2120 len = i_size - off;
2121 toread = len;
2122 while (toread > 0) {
2123 tocopy =
2124 sb->s_blocksize - offset <
2125 toread ? sb->s_blocksize - offset : toread;
2126 tmp_bh.b_state = 0;
2127 /* Quota files are without tails so we can safely use this function */
2128 reiserfs_write_lock(sb);
2129 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2130 reiserfs_write_unlock(sb);
2131 if (err)
2132 return err;
2133 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2134 memset(data, 0, tocopy);
2135 else {
2136 bh = sb_bread(sb, tmp_bh.b_blocknr);
2137 if (!bh)
2138 return -EIO;
2139 memcpy(data, bh->b_data + offset, tocopy);
2140 brelse(bh);
2141 }
2142 offset = 0;
2143 toread -= tocopy;
2144 data += tocopy;
2145 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002146 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002147 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148}
2149
2150/* Write to quotafile (we know the transaction is already started and has
2151 * enough credits) */
2152static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2153 const char *data, size_t len, loff_t off)
2154{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002155 struct inode *inode = sb_dqopt(sb)->files[type];
2156 unsigned long blk = off >> sb->s_blocksize_bits;
2157 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2158 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2159 size_t towrite = len;
2160 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161
Jan Kara9c3013e2007-09-11 15:23:29 -07002162 if (!current->journal_info) {
2163 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2164 " cancelled because transaction is not started.\n",
2165 (unsigned long long)off, (unsigned long long)len);
2166 return -EIO;
2167 }
Arjan van de Ven5c81a412006-07-03 00:25:20 -07002168 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002169 while (towrite > 0) {
2170 tocopy = sb->s_blocksize - offset < towrite ?
2171 sb->s_blocksize - offset : towrite;
2172 tmp_bh.b_state = 0;
2173 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2174 if (err)
2175 goto out;
2176 if (offset || tocopy != sb->s_blocksize)
2177 bh = sb_bread(sb, tmp_bh.b_blocknr);
2178 else
2179 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2180 if (!bh) {
2181 err = -EIO;
2182 goto out;
2183 }
2184 lock_buffer(bh);
2185 memcpy(bh->b_data + offset, data, tocopy);
2186 flush_dcache_page(bh->b_page);
2187 set_buffer_uptodate(bh);
2188 unlock_buffer(bh);
2189 reiserfs_prepare_for_journal(sb, bh, 1);
2190 journal_mark_dirty(current->journal_info, sb, bh);
2191 if (!journal_quota)
2192 reiserfs_add_ordered_list(inode, bh);
2193 brelse(bh);
2194 offset = 0;
2195 towrite -= tocopy;
2196 data += tocopy;
2197 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002199out:
Jan Kara10dd08d2008-07-04 09:59:34 -07002200 if (len == towrite) {
2201 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002202 return err;
Jan Kara10dd08d2008-07-04 09:59:34 -07002203 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002204 if (inode->i_size < off + len - towrite)
2205 i_size_write(inode, off + len - towrite);
2206 inode->i_version++;
2207 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2208 mark_inode_dirty(inode);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08002209 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002210 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211}
2212
2213#endif
2214
Al Viro152a0832010-07-25 00:46:55 +04002215static struct dentry *get_super_block(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -07002216 int flags, const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04002217 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218{
Al Viro152a0832010-07-25 00:46:55 +04002219 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220}
2221
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002222static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223{
2224 int ret;
2225
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002226 if ((ret = init_inodecache())) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227 return ret;
2228 }
2229
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002230 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002231
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002232 ret = register_filesystem(&reiserfs_fs_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002233
2234 if (ret == 0) {
2235 return 0;
2236 }
2237
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002238 reiserfs_proc_info_global_done();
2239 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240
2241 return ret;
2242}
2243
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002244static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002246 reiserfs_proc_info_global_done();
2247 unregister_filesystem(&reiserfs_fs_type);
2248 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002249}
2250
2251struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002252 .owner = THIS_MODULE,
2253 .name = "reiserfs",
Al Viro152a0832010-07-25 00:46:55 +04002254 .mount = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002255 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002256 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257};
2258
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002259MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2260MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2261MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002263module_init(init_reiserfs_fs);
2264module_exit(exit_reiserfs_fs);