blob: b4a7dd03bdb9b9e49931f7a2fc360f35fbe1a561 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
10 *
11 * NO WARRANTY
12 */
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
15#include <linux/vmalloc.h>
16#include <linux/time.h>
17#include <asm/uaccess.h>
18#include <linux/reiserfs_fs.h>
19#include <linux/reiserfs_acl.h>
20#include <linux/reiserfs_xattr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/init.h>
22#include <linux/blkdev.h>
23#include <linux/buffer_head.h>
Christoph Hellwiga5694252007-07-17 04:04:28 -070024#include <linux/exportfs.h>
Jan Kara74abb982008-07-25 01:46:51 -070025#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/vfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/mount.h>
28#include <linux/namei.h>
Coly Li651d0622009-04-02 16:59:41 -070029#include <linux/crc32.h>
Alessio Igor Bogani337eb002009-05-12 15:10:54 +020030#include <linux/smp_lock.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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700161
162 /* compose key to look for "save" links */
163 max_cpu_key.version = KEY_FORMAT_3_5;
164 max_cpu_key.on_disk_key.k_dir_id = ~0U;
165 max_cpu_key.on_disk_key.k_objectid = ~0U;
166 set_cpu_key_k_offset(&max_cpu_key, ~0U);
167 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Lepton Wufb46f342007-10-16 23:30:04 -0700169 memset(&last_inode_key, 0, sizeof(last_inode_key));
170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700172 /* Needed for iput() to work correctly and not trash data */
173 if (s->s_flags & MS_ACTIVE) {
174 ms_active_set = 0;
175 } else {
176 ms_active_set = 1;
177 s->s_flags |= MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700179 /* Turn on quotas so that they are updated correctly */
180 for (i = 0; i < MAXQUOTAS; i++) {
181 if (REISERFS_SB(s)->s_qf_names[i]) {
182 int ret = reiserfs_quota_on_mount(s, i);
183 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400184 reiserfs_warning(s, "reiserfs-2500",
185 "cannot turn on journaled "
186 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700187 }
188 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700191 done = 0;
192 REISERFS_SB(s)->s_is_unlinked_ok = 1;
193 while (!retval) {
194 retval = search_item(s, &max_cpu_key, &path);
195 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400196 reiserfs_error(s, "vs-2140",
197 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700198 break;
199 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700201 bh = get_last_bh(&path);
202 item_pos = get_item_pos(&path);
203 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400204 reiserfs_warning(s, "vs-2060",
205 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700206 break;
207 }
208 item_pos--;
209 ih = B_N_PITEM_HEAD(bh, item_pos);
210
211 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
212 /* there are no "save" links anymore */
213 break;
214
215 save_link_key = ih->ih_key;
216 if (is_indirect_le_ih(ih))
217 truncate = 1;
218 else
219 truncate = 0;
220
221 /* reiserfs_iget needs k_dirid and k_objectid only */
222 item = B_I_PITEM(bh, ih);
223 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
224 obj_key.on_disk_key.k_objectid =
225 le32_to_cpu(ih->ih_key.k_objectid);
226 obj_key.on_disk_key.k_offset = 0;
227 obj_key.on_disk_key.k_type = 0;
228
229 pathrelse(&path);
230
231 inode = reiserfs_iget(s, &obj_key);
232 if (!inode) {
233 /* the unlink almost completed, it just did not manage to remove
234 "save" link and release objectid */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400235 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700236 &obj_key);
237 retval = remove_save_link_only(s, &save_link_key, 1);
238 continue;
239 }
240
241 if (!truncate && inode->i_nlink) {
242 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400243 reiserfs_warning(s, "vs-2185",
244 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700245 &obj_key);
246 retval = remove_save_link_only(s, &save_link_key, 0);
247 continue;
248 }
Jan Kara77db4f22009-01-26 17:14:18 +0100249 vfs_dq_init(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700250
251 if (truncate && S_ISDIR(inode->i_mode)) {
252 /* We got a truncate request for a dir which is impossible.
253 The only imaginable way is to execute unfinished truncate request
254 then boot into old kernel, remove the file and create dir with
255 the same key. */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400256 reiserfs_warning(s, "green-2101",
257 "impossible truncate on a "
258 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700259 INODE_PKEY(inode));
260 retval = remove_save_link_only(s, &save_link_key, 0);
261 truncate = 0;
262 iput(inode);
263 continue;
264 }
265
266 if (truncate) {
267 REISERFS_I(inode)->i_flags |=
268 i_link_saved_truncate_mask;
269 /* not completed truncate found. New size was committed together
270 with "save" link */
271 reiserfs_info(s, "Truncating %k to %Ld ..",
272 INODE_PKEY(inode), inode->i_size);
273 reiserfs_truncate_file(inode,
274 0
275 /*don't update modification time */
276 );
277 retval = remove_save_link(inode, truncate);
278 } else {
279 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
280 /* not completed unlink (rmdir) found */
281 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700282 if (memcmp(&last_inode_key, INODE_PKEY(inode),
283 sizeof(last_inode_key))){
284 last_inode_key = *INODE_PKEY(inode);
285 /* removal gets completed in iput */
286 retval = 0;
287 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400288 reiserfs_warning(s, "super-2189", "Dead loop "
289 "in finish_unfinished "
290 "detected, just remove "
291 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700292 retval = remove_save_link_only(s,
293 &save_link_key, 0);
294 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700295 }
296
297 iput(inode);
298 printk("done\n");
299 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700301 REISERFS_SB(s)->s_is_unlinked_ok = 0;
302
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700304 /* Turn quotas off */
305 for (i = 0; i < MAXQUOTAS; i++) {
306 if (sb_dqopt(s)->files[i])
Jan Kara1b445a92008-04-28 02:14:35 -0700307 vfs_quota_off(s, i, 0);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700308 }
309 if (ms_active_set)
310 /* Restore the flag back */
311 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700313 pathrelse(&path);
314 if (done)
315 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
316 "Completed\n", done);
317 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320/* to protect file being unlinked from getting lost we "safe" link files
321 being unlinked. This link will be deleted in the same transaction with last
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200322 item of file. mounting the filesystem we scan all these links and remove
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 files which almost got lost */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700324void add_save_link(struct reiserfs_transaction_handle *th,
325 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700327 INITIALIZE_PATH(path);
328 int retval;
329 struct cpu_key key;
330 struct item_head ih;
331 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700333 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700335 /* file can only get one "save link" of each kind */
336 RFALSE(truncate &&
337 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
338 "saved link already exists for truncated inode %lx",
339 (long)inode->i_ino);
340 RFALSE(!truncate &&
341 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
342 "saved link already exists for unlinked inode %lx",
343 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700345 /* setup key of "save" link */
346 key.version = KEY_FORMAT_3_5;
347 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
348 key.on_disk_key.k_objectid = inode->i_ino;
349 if (!truncate) {
350 /* unlink, rmdir, rename */
351 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
352 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700354 /* item head of "safe" link */
355 make_le_item_head(&ih, &key, key.version,
356 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
357 4 /*length */ , 0xffff /*free space */ );
358 } else {
359 /* truncate */
360 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400361 reiserfs_warning(inode->i_sb, "green-2102",
362 "Adding a truncate savelink for "
363 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700364 INODE_PKEY(inode));
365 set_cpu_key_k_offset(&key, 1);
366 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700368 /* item head of "safe" link */
369 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
370 4 /*length */ , 0 /*free space */ );
371 }
372 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700374 /* look for its place in the tree */
375 retval = search_item(inode->i_sb, &key, &path);
376 if (retval != ITEM_NOT_FOUND) {
377 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400378 reiserfs_error(inode->i_sb, "vs-2100",
379 "search_by_key (%K) returned %d", &key,
380 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700381 pathrelse(&path);
382 return;
383 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700385 /* body of "save" link */
386 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700388 /* put "save" link inot tree, don't charge quota to anyone */
389 retval =
390 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
391 if (retval) {
392 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400393 reiserfs_error(inode->i_sb, "vs-2120",
394 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700395 } else {
396 if (truncate)
397 REISERFS_I(inode)->i_flags |=
398 i_link_saved_truncate_mask;
399 else
400 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
401 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402}
403
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700405int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700407 struct reiserfs_transaction_handle th;
408 struct reiserfs_key key;
409 int err;
410
411 /* we are going to do one balancing only */
412 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
413 if (err)
414 return err;
415
416 /* setup key of "save" link */
417 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
418 key.k_objectid = INODE_PKEY(inode)->k_objectid;
419 if (!truncate) {
420 /* unlink, rmdir, rename */
421 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
422 1 + inode->i_sb->s_blocksize);
423 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
424 } else {
425 /* truncate */
426 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
427 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
428 }
429
430 if ((truncate &&
431 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
432 (!truncate &&
433 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
434 /* don't take quota bytes from anywhere */
435 reiserfs_delete_solid_item(&th, NULL, &key);
436 if (!truncate) {
437 reiserfs_release_objectid(&th, inode->i_ino);
438 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
439 } else
440 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
441
442 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443}
444
David Howellsedc666e2006-10-11 01:22:14 -0700445static void reiserfs_kill_sb(struct super_block *s)
446{
447 if (REISERFS_SB(s)) {
448 if (REISERFS_SB(s)->xattr_root) {
449 d_invalidate(REISERFS_SB(s)->xattr_root);
450 dput(REISERFS_SB(s)->xattr_root);
451 REISERFS_SB(s)->xattr_root = NULL;
452 }
David Howellsedc666e2006-10-11 01:22:14 -0700453 if (REISERFS_SB(s)->priv_root) {
454 d_invalidate(REISERFS_SB(s)->priv_root);
455 dput(REISERFS_SB(s)->priv_root);
456 REISERFS_SB(s)->priv_root = NULL;
457 }
458 }
459
460 kill_block_super(s);
461}
462
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700463static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700465 struct reiserfs_transaction_handle th;
466 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200468 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200469
Christoph Hellwig8c85e122009-04-28 18:00:26 +0200470 if (s->s_dirt)
471 reiserfs_write_super(s);
472
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700473 /* change file system state to current state if it was mounted with read-write permissions */
474 if (!(s->s_flags & MS_RDONLY)) {
475 if (!journal_begin(&th, s, 10)) {
476 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
477 1);
478 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
479 REISERFS_SB(s)->s_mount_state);
480 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
481 }
482 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700484 /* note, journal_release checks for readonly mount, and can decide not
485 ** to do a journal_end
486 */
487 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Jeff Mahoney50652272006-09-30 23:28:44 -0700489 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700491 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700493 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700495 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400496 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700497 REISERFS_SB(s)->reserved_blocks);
498 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700500 reiserfs_proc_info_done(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200502 reiserfs_write_unlock(s);
503 mutex_destroy(&REISERFS_SB(s)->lock);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700504 kfree(s->s_fs_info);
505 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506}
507
Christoph Lametere18b8902006-12-06 20:33:20 -0800508static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
510static struct inode *reiserfs_alloc_inode(struct super_block *sb)
511{
512 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700513 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800514 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 if (!ei)
516 return NULL;
517 return &ei->vfs_inode;
518}
519
520static void reiserfs_destroy_inode(struct inode *inode)
521{
522 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
523}
524
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700525static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700527 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Christoph Lametera35afb82007-05-16 22:10:57 -0700529 INIT_LIST_HEAD(&ei->i_prealloc_list);
530 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533static int init_inodecache(void)
534{
535 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700536 sizeof(struct
537 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800538 0, (SLAB_RECLAIM_ACCOUNT|
539 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900540 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 if (reiserfs_inode_cachep == NULL)
542 return -ENOMEM;
543 return 0;
544}
545
546static void destroy_inodecache(void)
547{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700548 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549}
550
551/* we don't mark inodes dirty, we just log them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700552static void reiserfs_dirty_inode(struct inode *inode)
553{
554 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700556 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200557 int lock_depth;
558
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700559 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400560 reiserfs_warning(inode->i_sb, "clm-6006",
561 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700562 inode->i_ino);
563 return;
564 }
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200565 lock_depth = reiserfs_write_lock_once(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700567 /* this is really only used for atime updates, so they don't have
568 ** to be included in O_SYNC or fsync
569 */
570 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200571 if (err)
572 goto out;
573
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700574 reiserfs_update_sd(&th, inode);
575 journal_end(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200576
577out:
578 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579}
580
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700582static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
583 size_t, loff_t);
584static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
585 loff_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586#endif
587
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800588static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700589 .alloc_inode = reiserfs_alloc_inode,
590 .destroy_inode = reiserfs_destroy_inode,
591 .write_inode = reiserfs_write_inode,
592 .dirty_inode = reiserfs_dirty_inode,
593 .delete_inode = reiserfs_delete_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700594 .put_super = reiserfs_put_super,
595 .write_super = reiserfs_write_super,
596 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800597 .freeze_fs = reiserfs_freeze,
598 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700599 .statfs = reiserfs_statfs,
600 .remount_fs = reiserfs_remount,
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -0800601 .show_options = generic_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700603 .quota_read = reiserfs_quota_read,
604 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605#endif
606};
607
608#ifdef CONFIG_QUOTA
609#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611static int reiserfs_write_dquot(struct dquot *);
612static int reiserfs_acquire_dquot(struct dquot *);
613static int reiserfs_release_dquot(struct dquot *);
614static int reiserfs_mark_dquot_dirty(struct dquot *);
615static int reiserfs_write_info(struct super_block *, int);
Jan Kara1b445a92008-04-28 02:14:35 -0700616static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700618static const struct dquot_operations reiserfs_quota_operations = {
Jan Kara643d00c2009-01-12 19:07:14 +0100619 .initialize = dquot_initialize,
620 .drop = dquot_drop,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700621 .alloc_space = dquot_alloc_space,
622 .alloc_inode = dquot_alloc_inode,
623 .free_space = dquot_free_space,
624 .free_inode = dquot_free_inode,
625 .transfer = dquot_transfer,
626 .write_dquot = reiserfs_write_dquot,
627 .acquire_dquot = reiserfs_acquire_dquot,
628 .release_dquot = reiserfs_release_dquot,
629 .mark_dirty = reiserfs_mark_dquot_dirty,
630 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100631 .alloc_dquot = dquot_alloc,
632 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633};
634
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700635static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700636 .quota_on = reiserfs_quota_on,
637 .quota_off = vfs_quota_off,
638 .quota_sync = vfs_quota_sync,
639 .get_info = vfs_get_dqinfo,
640 .set_info = vfs_set_dqinfo,
641 .get_dqblk = vfs_get_dqblk,
642 .set_dqblk = vfs_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643};
644#endif
645
Christoph Hellwig39655162007-10-21 16:42:17 -0700646static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700647 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700648 .fh_to_dentry = reiserfs_fh_to_dentry,
649 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700650 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700651};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
653/* this struct is used in reiserfs_getopt () for containing the value for those
654 mount options that have values rather than being toggles. */
655typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700656 char *value;
657 int setmask; /* bitmask which is to set on mount_options bitmask when this
658 value is found, 0 is no bits are to be changed. */
659 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
660 value is found, 0 is no bits are to be changed. This is
661 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662} arg_desc_t;
663
664/* Set this bit in arg_required to allow empty arguments */
665#define REISERFS_OPT_ALLOWEMPTY 31
666
667/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
668 mount options */
669typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700670 char *option_name;
671 int arg_required; /* 0 if argument is not required, not 0 otherwise */
672 const arg_desc_t *values; /* list of values accepted by an option */
673 int setmask; /* bitmask which is to set on mount_options bitmask when this
674 value is found, 0 is no bits are to be changed. */
675 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
676 value is found, 0 is no bits are to be changed. This is
677 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678} opt_desc_t;
679
680/* possible values for -o data= */
681static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700682 {"ordered", 1 << REISERFS_DATA_ORDERED,
683 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
684 {"journal", 1 << REISERFS_DATA_LOG,
685 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
686 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
687 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800688 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689};
690
691/* possible values for -o barrier= */
692static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700693 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
694 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800695 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696};
697
698/* possible values for "-o block-allocator=" and bits which are to be set in
699 s_mount_opt of reiserfs specific part of in-core super block */
700static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700701 {"noborder", 1 << REISERFS_NO_BORDER, 0},
702 {"border", 0, 1 << REISERFS_NO_BORDER},
703 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
704 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
705 {"test4", 1 << REISERFS_TEST4, 0},
706 {"notest4", 0, 1 << REISERFS_TEST4},
707 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708};
709
710static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700711 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
712 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
713 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
714 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715};
716
717static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700718 {"panic", 1 << REISERFS_ERROR_PANIC,
719 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
720 {"ro-remount", 1 << REISERFS_ERROR_RO,
721 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700723 {"continue", 1 << REISERFS_ERROR_CONTINUE,
724 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700726 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727};
728
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729/* proceed only one option from a list *cur - string containing of mount options
730 opts - array of options which are accepted
731 opt_arg - if option is found and requires an argument and if it is specifed
732 in the input - pointer to the argument is stored here
733 bit_flags - if option requires to set a certain bit - it is set here
734 return -1 if unknown option is found, opt->arg_required otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700735static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
736 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700738 char *p;
Jeff Mahoney0222e652009-03-30 14:02:44 -0400739 /* foo=bar,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700740 ^ ^ ^
741 | | +-- option_end
742 | +-- arg_start
743 +-- option_start
744 */
745 const opt_desc_t *opt;
746 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700748 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700750 /* assume argument cannot contain commas */
751 *cur = strchr(p, ',');
752 if (*cur) {
753 *(*cur) = '\0';
754 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700757 if (!strncmp(p, "alloc=", 6)) {
758 /* Ugly special case, probably we should redo options parser so that
759 it can understand several arguments for some options, also so that
760 it can fill several bitfields with option values. */
761 if (reiserfs_parse_alloc_options(s, p + 6)) {
762 return -1;
763 } else {
764 return 0;
765 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700767
768 /* for every option in the list */
769 for (opt = opts; opt->option_name; opt++) {
770 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
771 if (bit_flags) {
772 if (opt->clrmask ==
773 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400774 reiserfs_warning(s, "super-6500",
775 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700776 p);
777 else
778 *bit_flags &= ~opt->clrmask;
779 if (opt->setmask ==
780 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400781 reiserfs_warning(s, "super-6501",
782 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700783 p);
784 else
785 *bit_flags |= opt->setmask;
786 }
787 break;
788 }
789 }
790 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400791 reiserfs_warning(s, "super-6502",
792 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700793 return -1;
794 }
795
796 p += strlen(opt->option_name);
797 switch (*p) {
798 case '=':
799 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400800 reiserfs_warning(s, "super-6503",
801 "the option \"%s\" does not "
802 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700803 opt->option_name);
804 return -1;
805 }
806 break;
807
808 case 0:
809 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400810 reiserfs_warning(s, "super-6504",
811 "the option \"%s\" requires an "
812 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700813 return -1;
814 }
815 break;
816 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400817 reiserfs_warning(s, "super-6505",
818 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700819 opt->option_name);
820 return -1;
821 }
822
823 /* move to the argument, or to next option if argument is not required */
824 p++;
825
826 if (opt->arg_required
827 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
828 && !strlen(p)) {
829 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400830 reiserfs_warning(s, "super-6506",
831 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700832 opt->option_name);
833 return -1;
834 }
835
836 if (!opt->values) {
837 /* *=NULLopt_arg contains pointer to argument */
838 *opt_arg = p;
839 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
840 }
841
842 /* values possible for this option are listed in opt->values */
843 for (arg = opt->values; arg->value; arg++) {
844 if (!strcmp(p, arg->value)) {
845 if (bit_flags) {
846 *bit_flags &= ~arg->clrmask;
847 *bit_flags |= arg->setmask;
848 }
849 return opt->arg_required;
850 }
851 }
852
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400853 reiserfs_warning(s, "super-6506",
854 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700855 opt->option_name);
856 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857}
858
859/* returns 0 if something is wrong in option string, 1 - otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700860static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
861 unsigned long *mount_options,
862 /* after the parsing phase, contains the
863 collection of bitflags defining what
864 mount options were selected. */
865 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
866 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -0700867 unsigned int *commit_max_age,
868 char **qf_names,
869 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700871 int c;
872 char *arg = NULL;
873 char *pos;
874 opt_desc_t opts[] = {
875 /* Compatibility stuff, so that -o notail for old setups still work */
876 {"tails",.arg_required = 't',.values = tails},
877 {"notail",.clrmask =
878 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
879 {"conv",.setmask = 1 << REISERFS_CONVERT},
880 {"attrs",.setmask = 1 << REISERFS_ATTRS},
881 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -0400882 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700884 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
885 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700887 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
888 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889#endif
890#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700891 {"acl",.setmask = 1 << REISERFS_POSIXACL},
892 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700894 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
895 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800897 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700898 {"replayonly",.setmask = 1 << REPLAYONLY},
899 {"block-allocator",.arg_required = 'a',.values = balloc},
900 {"data",.arg_required = 'd',.values = logging_mode},
901 {"barrier",.arg_required = 'b',.values = barrier_mode},
902 {"resize",.arg_required = 'r',.values = NULL},
903 {"jdev",.arg_required = 'j',.values = NULL},
904 {"nolargeio",.arg_required = 'w',.values = NULL},
905 {"commit",.arg_required = 'c',.values = NULL},
906 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
907 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
908 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
909 {"errors",.arg_required = 'e',.values = error_actions},
910 {"usrjquota",.arg_required =
911 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
912 {"grpjquota",.arg_required =
913 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
914 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800915 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700916 };
917
918 *blocks = 0;
919 if (!options || !*options)
920 /* use default configuration: create tails, journaling on, no
921 conversion to newest format */
922 return 1;
923
924 for (pos = options; pos;) {
925 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
926 if (c == -1)
927 /* wrong option is given */
928 return 0;
929
930 if (c == 'r') {
931 char *p;
932
933 p = NULL;
934 /* "resize=NNN" or "resize=auto" */
935
936 if (!strcmp(arg, "auto")) {
937 /* From JFS code, to auto-get the size. */
938 *blocks =
939 s->s_bdev->bd_inode->i_size >> s->
940 s_blocksize_bits;
941 } else {
942 *blocks = simple_strtoul(arg, &p, 0);
943 if (*p != '\0') {
944 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400945 reiserfs_warning(s, "super-6507",
946 "bad value %s for "
947 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700948 return 0;
949 }
950 }
951 }
952
953 if (c == 'c') {
954 char *p = NULL;
955 unsigned long val = simple_strtoul(arg, &p, 0);
956 /* commit=NNN (time in seconds) */
957 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400958 reiserfs_warning(s, "super-6508",
959 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700960 arg);
961 return 0;
962 }
963 *commit_max_age = (unsigned int)val;
964 }
965
966 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400967 reiserfs_warning(s, "super-6509", "nolargeio option "
968 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -0700969 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700970 }
971
972 if (c == 'j') {
973 if (arg && *arg && jdev_name) {
974 if (*jdev_name) { //Hm, already assigned?
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400975 reiserfs_warning(s, "super-6510",
976 "journal device was "
977 "already specified to "
978 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700979 return 0;
980 }
981 *jdev_name = arg;
982 }
983 }
984#ifdef CONFIG_QUOTA
985 if (c == 'u' || c == 'g') {
986 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
987
Jan Kara6929f892008-08-20 18:16:36 +0200988 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -0700989 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400990 reiserfs_warning(s, "super-6511",
991 "cannot change journaled "
992 "quota options when quota "
993 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700994 return 0;
995 }
996 if (*arg) { /* Some filename specified? */
997 if (REISERFS_SB(s)->s_qf_names[qtype]
998 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
999 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001000 reiserfs_warning(s, "super-6512",
1001 "%s quota file "
1002 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001003 QTYPE2NAME(qtype));
1004 return 0;
1005 }
1006 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001007 reiserfs_warning(s, "super-6513",
1008 "quotafile must be "
1009 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001010 return 0;
1011 }
Jan Kara00b44192008-07-25 01:46:38 -07001012 qf_names[qtype] =
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001013 kmalloc(strlen(arg) + 1, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001014 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001015 reiserfs_warning(s, "reiserfs-2502",
1016 "not enough memory "
1017 "for storing "
1018 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001019 return 0;
1020 }
Jan Kara00b44192008-07-25 01:46:38 -07001021 strcpy(qf_names[qtype], arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001022 *mount_options |= 1 << REISERFS_QUOTA;
1023 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001024 if (qf_names[qtype] !=
1025 REISERFS_SB(s)->s_qf_names[qtype])
1026 kfree(qf_names[qtype]);
1027 qf_names[qtype] = NULL;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001028 }
1029 }
1030 if (c == 'f') {
1031 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001032 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001033 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001034 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001035 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001036 reiserfs_warning(s, "super-6514",
1037 "unknown quota format "
1038 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001039 return 0;
1040 }
Jan Kara6929f892008-08-20 18:16:36 +02001041 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001042 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001043 reiserfs_warning(s, "super-6515",
1044 "cannot change journaled "
1045 "quota options when quota "
1046 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001047 return 0;
1048 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001049 }
1050#else
1051 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001052 reiserfs_warning(s, "reiserfs-2503", "journaled "
1053 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001054 return 0;
1055 }
1056#endif
1057 }
1058
1059#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001060 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1061 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001062 reiserfs_warning(s, "super-6515",
1063 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001064 return 0;
1065 }
1066 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1067 if (!(*mount_options & (1 << REISERFS_QUOTA))
Jan Kara6929f892008-08-20 18:16:36 +02001068 && sb_any_quota_loaded(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001069 reiserfs_warning(s, "super-6516", "quota options must "
1070 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001071 return 0;
1072 }
1073#endif
1074
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076}
1077
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001078static void switch_data_mode(struct super_block *s, unsigned long mode)
1079{
1080 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1081 (1 << REISERFS_DATA_ORDERED) |
1082 (1 << REISERFS_DATA_WRITEBACK));
1083 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084}
1085
1086static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1087{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001088 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1089 if (!reiserfs_data_log(s)) {
1090 switch_data_mode(s, REISERFS_DATA_LOG);
1091 reiserfs_info(s, "switching to journaled data mode\n");
1092 }
1093 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1094 if (!reiserfs_data_ordered(s)) {
1095 switch_data_mode(s, REISERFS_DATA_ORDERED);
1096 reiserfs_info(s, "switching to ordered data mode\n");
1097 }
1098 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1099 if (!reiserfs_data_writeback(s)) {
1100 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1101 reiserfs_info(s, "switching to writeback data mode\n");
1102 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104}
1105
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001106static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001108 int flush = (1 << REISERFS_BARRIER_FLUSH);
1109 int none = (1 << REISERFS_BARRIER_NONE);
1110 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001112 if (bits & all_barrier) {
1113 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1114 if (bits & flush) {
1115 REISERFS_SB(s)->s_mount_opt |= flush;
1116 printk("reiserfs: enabling write barrier flush mode\n");
1117 } else if (bits & none) {
1118 REISERFS_SB(s)->s_mount_opt |= none;
1119 printk("reiserfs: write barriers turned off\n");
1120 }
1121 }
1122}
1123
1124static void handle_attrs(struct super_block *s)
1125{
1126 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1127
1128 if (reiserfs_attrs(s)) {
1129 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001130 reiserfs_warning(s, "super-6517", "cannot support "
1131 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001132 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 return;
1134 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001135 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001136 reiserfs_warning(s, "super-6518", "cannot support "
1137 "attributes until flag is set in "
1138 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001139 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 }
1141 }
1142}
1143
Jan Kara00b44192008-07-25 01:46:38 -07001144#ifdef CONFIG_QUOTA
1145static void handle_quota_files(struct super_block *s, char **qf_names,
1146 unsigned int *qfmt)
1147{
1148 int i;
1149
1150 for (i = 0; i < MAXQUOTAS; i++) {
1151 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1152 kfree(REISERFS_SB(s)->s_qf_names[i]);
1153 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1154 }
1155 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1156}
1157#endif
1158
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001159static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001161 struct reiserfs_super_block *rs;
1162 struct reiserfs_transaction_handle th;
1163 unsigned long blocks;
1164 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1165 unsigned long safe_mask = 0;
1166 unsigned int commit_max_age = (unsigned int)-1;
1167 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001168 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001169 int err;
Jan Kara00b44192008-07-25 01:46:38 -07001170 char *qf_names[MAXQUOTAS];
1171 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001173 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001174#endif
Jan Kara00b44192008-07-25 01:46:38 -07001175
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001176 reiserfs_write_lock(s);
1177
1178#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001179 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180#endif
1181
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001182 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001184 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001185 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1186 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001188 for (i = 0; i < MAXQUOTAS; i++)
1189 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1190 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001191#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001192 err = -EINVAL;
1193 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 }
Jan Kara00b44192008-07-25 01:46:38 -07001195#ifdef CONFIG_QUOTA
1196 handle_quota_files(s, qf_names, &qfmt);
1197#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001199 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001201 /* Add options that are safe here */
1202 safe_mask |= 1 << REISERFS_SMALLTAIL;
1203 safe_mask |= 1 << REISERFS_LARGETAIL;
1204 safe_mask |= 1 << REISERFS_NO_BORDER;
1205 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1206 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1207 safe_mask |= 1 << REISERFS_TEST4;
1208 safe_mask |= 1 << REISERFS_ATTRS;
1209 safe_mask |= 1 << REISERFS_XATTRS_USER;
1210 safe_mask |= 1 << REISERFS_POSIXACL;
1211 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1212 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1213 safe_mask |= 1 << REISERFS_ERROR_RO;
1214 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1215 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1216 safe_mask |= 1 << REISERFS_QUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001218 /* Update the bitmask, taking care to keep
1219 * the bits we're not allowed to change here */
1220 REISERFS_SB(s)->s_mount_opt =
1221 (REISERFS_SB(s)->
1222 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001224 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1225 journal->j_max_commit_age = commit_max_age;
1226 journal->j_max_trans_age = commit_max_age;
1227 } else if (commit_max_age == 0) {
1228 /* 0 means restore defaults. */
1229 journal->j_max_commit_age = journal->j_default_max_commit_age;
1230 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1231 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001233 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001234 err = reiserfs_resize(s, blocks);
1235 if (err != 0)
1236 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001237 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001239 if (*mount_flags & MS_RDONLY) {
1240 reiserfs_xattr_init(s, *mount_flags);
1241 /* remount read-only */
1242 if (s->s_flags & MS_RDONLY)
1243 /* it is read-only already */
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001244 goto out_ok;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001245 /* try to remount file system with read-only permissions */
1246 if (sb_umount_state(rs) == REISERFS_VALID_FS
1247 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001248 goto out_ok;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001249 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001251 err = journal_begin(&th, s, 10);
1252 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001253 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001255 /* Mounting a rw partition read-only. */
1256 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1257 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1258 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1259 } else {
1260 /* remount read-write */
1261 if (!(s->s_flags & MS_RDONLY)) {
1262 reiserfs_xattr_init(s, *mount_flags);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001263 goto out_ok; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001264 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001266 if (reiserfs_is_journal_aborted(journal)) {
1267 err = journal->j_errno;
1268 goto out_err;
1269 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001271 handle_data_mode(s, mount_options);
1272 handle_barrier_mode(s, mount_options);
1273 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1274 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1275 err = journal_begin(&th, s, 10);
1276 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001277 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001279 /* Mount a partition which is read-only, read-write */
1280 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1281 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1282 s->s_flags &= ~MS_RDONLY;
1283 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001284 if (!old_format_only(s))
1285 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001286 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1287 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1288 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1289 }
1290 /* this will force a full flush of all journal lists */
1291 SB_JOURNAL(s)->j_must_wait = 1;
1292 err = journal_end(&th, s, 10);
1293 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001294 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001295 s->s_dirt = 0;
1296
1297 if (!(*mount_flags & MS_RDONLY)) {
1298 finish_unfinished(s);
1299 reiserfs_xattr_init(s, *mount_flags);
1300 }
1301
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001302out_ok:
Al Viro2a32ceb2009-05-08 16:05:57 -04001303 replace_mount_options(s, new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001304 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001305 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001306
1307out_err:
1308 kfree(new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001309 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001310 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311}
1312
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001313static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001315 struct buffer_head *bh;
1316 struct reiserfs_super_block *rs;
1317 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001319 bh = sb_bread(s, offset / s->s_blocksize);
1320 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001321 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001322 "bread failed (dev %s, block %lu, size %lu)",
1323 reiserfs_bdevname(s), offset / s->s_blocksize,
1324 s->s_blocksize);
1325 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001328 rs = (struct reiserfs_super_block *)bh->b_data;
1329 if (!is_any_reiserfs_magic_string(rs)) {
1330 brelse(bh);
1331 return 1;
1332 }
1333 //
1334 // ok, reiserfs signature (old or new) found in at the given offset
Jeff Mahoney0222e652009-03-30 14:02:44 -04001335 //
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001336 fs_blocksize = sb_blocksize(rs);
1337 brelse(bh);
1338 sb_set_blocksize(s, fs_blocksize);
1339
1340 bh = sb_bread(s, offset / s->s_blocksize);
1341 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001342 reiserfs_warning(s, "sh-2007",
1343 "bread failed (dev %s, block %lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001344 reiserfs_bdevname(s), offset / s->s_blocksize,
1345 s->s_blocksize);
1346 return 1;
1347 }
1348
1349 rs = (struct reiserfs_super_block *)bh->b_data;
1350 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001351 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1352 "filesystem on (dev %s, block %Lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001353 reiserfs_bdevname(s),
1354 (unsigned long long)bh->b_blocknr,
1355 s->s_blocksize);
1356 brelse(bh);
1357 return 1;
1358 }
1359
1360 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1361 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001362 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1363 "--rebuild-tree run detected. Please run\n"
1364 "reiserfsck --rebuild-tree and wait for a "
1365 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001366 "get newer reiserfsprogs package");
1367 return 1;
1368 }
1369
1370 SB_BUFFER_WITH_SB(s) = bh;
1371 SB_DISK_SUPER_BLOCK(s) = rs;
1372
1373 if (is_reiserfs_jr(rs)) {
1374 /* magic is of non-standard journal filesystem, look at s_version to
1375 find which format is in use */
1376 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001377 reiserfs_info(s, "found reiserfs format \"3.6\""
1378 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001379 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001380 reiserfs_info(s, "found reiserfs format \"3.5\""
1381 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001382 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001383 reiserfs_warning(s, "sh-2012", "found unknown "
1384 "format \"%u\" of reiserfs with "
1385 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001386 return 1;
1387 }
1388 } else
1389 /* s_version of standard format may contain incorrect information,
1390 so we just look at the magic string */
1391 reiserfs_info(s,
1392 "found reiserfs format \"%s\" with standard journal\n",
1393 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1394
1395 s->s_op = &reiserfs_sops;
1396 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001398 s->s_qcop = &reiserfs_qctl_operations;
1399 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400#endif
1401
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001402 /* new format is limited by the 32 bit wide i_blocks field, want to
1403 ** be one full block below that.
1404 */
1405 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1406 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407}
1408
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001410static int reread_meta_blocks(struct super_block *s)
1411{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001412 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001413 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001414 wait_on_buffer(SB_BUFFER_WITH_SB(s));
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001415 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001416 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001417 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001418 return 1;
1419 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001421 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422}
1423
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424/////////////////////////////////////////////////////
1425// hash detection stuff
1426
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427// if root directory is empty - we set default - Yura's - hash and
1428// warn about it
1429// FIXME: we look for only one name in a directory. If tea and yura
1430// bith have the same value - we ask user to send report to the
1431// mailing list
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001432static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001434 int retval;
1435 struct inode *inode;
1436 struct cpu_key key;
1437 INITIALIZE_PATH(path);
1438 struct reiserfs_dir_entry de;
1439 __u32 hash = DEFAULT_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001441 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001443 do { // Some serious "goto"-hater was there ;)
1444 u32 teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001446 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1447 retval = search_by_entry_key(s, &key, &path, &de);
1448 if (retval == IO_ERROR) {
1449 pathrelse(&path);
1450 return UNSET_HASH;
1451 }
1452 if (retval == NAME_NOT_FOUND)
1453 de.de_entry_num--;
1454 set_de_name_and_namelen(&de);
1455 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1456 /* allow override in this case */
1457 if (reiserfs_rupasov_hash(s)) {
1458 hash = YURA_HASH;
1459 }
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001460 reiserfs_info(s, "FS seems to be empty, autodetect "
1461 "is using the default hash\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001462 break;
1463 }
1464 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1465 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1466 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1467 if (((teahash == r5hash)
1468 &&
1469 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1470 == r5hash)) || ((teahash == yurahash)
1471 && (yurahash ==
1472 GET_HASH_VALUE(deh_offset
1473 (&
1474 (de.
1475 de_deh[de.
1476 de_entry_num])))))
1477 || ((r5hash == yurahash)
1478 && (yurahash ==
1479 GET_HASH_VALUE(deh_offset
1480 (&(de.de_deh[de.de_entry_num])))))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001481 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1482 "automatically detect hash function. "
1483 "Please mount with -o "
1484 "hash={tea,rupasov,r5}");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001485 hash = UNSET_HASH;
1486 break;
1487 }
1488 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1489 yurahash)
1490 hash = YURA_HASH;
1491 else if (GET_HASH_VALUE
1492 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1493 hash = TEA_HASH;
1494 else if (GET_HASH_VALUE
1495 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1496 hash = R5_HASH;
1497 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001498 reiserfs_warning(s, "reiserfs-2506",
1499 "Unrecognised hash function");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001500 hash = UNSET_HASH;
1501 }
1502 } while (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001504 pathrelse(&path);
1505 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506}
1507
1508// finds out which hash names are sorted with
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001509static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001511 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001513 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001515 /* reiserfs_hash_detect() == true if any of the hash mount options
1516 ** were used. We must check them to make sure the user isn't
1517 ** using a bad hash value
1518 */
1519 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1520 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001522 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney0222e652009-03-30 14:02:44 -04001523 /* detection has found the hash, and we must check against the
1524 ** mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001525 */
1526 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001527 reiserfs_warning(s, "reiserfs-2507",
1528 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001529 "unable to force rupasov hash",
1530 reiserfs_hashname(code));
1531 code = UNSET_HASH;
1532 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001533 reiserfs_warning(s, "reiserfs-2508",
1534 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001535 "unable to force tea hash",
1536 reiserfs_hashname(code));
1537 code = UNSET_HASH;
1538 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001539 reiserfs_warning(s, "reiserfs-2509",
1540 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001541 "unable to force r5 hash",
1542 reiserfs_hashname(code));
1543 code = UNSET_HASH;
1544 }
1545 } else {
1546 /* find_hash_out was not called or could not determine the hash */
1547 if (reiserfs_rupasov_hash(s)) {
1548 code = YURA_HASH;
1549 } else if (reiserfs_tea_hash(s)) {
1550 code = TEA_HASH;
1551 } else if (reiserfs_r5_hash(s)) {
1552 code = R5_HASH;
1553 }
1554 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555
Jeff Mahoney0222e652009-03-30 14:02:44 -04001556 /* if we are mounted RW, and we have a new valid hash code, update
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001557 ** the super
1558 */
1559 if (code != UNSET_HASH &&
1560 !(s->s_flags & MS_RDONLY) &&
1561 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1562 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1563 }
1564 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565}
1566
1567// return pointer to appropriate function
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001568static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001570 switch (what_hash(s)) {
1571 case TEA_HASH:
1572 reiserfs_info(s, "Using tea hash to sort names\n");
1573 return keyed_hash;
1574 case YURA_HASH:
1575 reiserfs_info(s, "Using rupasov hash to sort names\n");
1576 return yura_hash;
1577 case R5_HASH:
1578 reiserfs_info(s, "Using r5 hash to sort names\n");
1579 return r5_hash;
1580 }
1581 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582}
1583
1584// this is used to set up correct value for old partitions
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001585static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001587 if (func == keyed_hash)
1588 return TEA_HASH;
1589 if (func == yura_hash)
1590 return YURA_HASH;
1591 if (func == r5_hash)
1592 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001594 BUG(); // should never happen
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001596 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597}
1598
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001599#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001601 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001603static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001605 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001606 struct reiserfs_transaction_handle th;
1607 int old_format = 0;
1608 unsigned long blocks;
1609 unsigned int commit_max_age = 0;
1610 int jinit_done = 0;
1611 struct reiserfs_iget_args args;
1612 struct reiserfs_super_block *rs;
1613 char *jdev_name;
1614 struct reiserfs_sb_info *sbi;
1615 int errval = -EINVAL;
Jan Kara00b44192008-07-25 01:46:38 -07001616 char *qf_names[MAXQUOTAS] = {};
1617 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001619 save_mount_options(s, data);
1620
Yan Burman01afb212006-12-06 20:39:01 -08001621 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001622 if (!sbi) {
1623 errval = -ENOMEM;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001624 goto error_alloc;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001625 }
1626 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001627 /* Set default values for options: non-aggressive tails, RO on errors */
1628 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1629 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1630 /* no preallocation minimum, be smart in
1631 reiserfs_file_write instead */
1632 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1633 /* Preallocate by 16 blocks (17-1) at once */
1634 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001635 /* setup default block allocator options */
1636 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001638 mutex_init(&REISERFS_SB(s)->lock);
1639 REISERFS_SB(s)->lock_depth = -1;
1640
1641 /*
1642 * This function is called with the bkl, which also was the old
1643 * locking used here.
1644 * do_journal_begin() will soon check if we hold the lock (ie: was the
1645 * bkl). This is likely because do_journal_begin() has several another
1646 * callers because at this time, it doesn't seem to be necessary to
1647 * protect against anything.
1648 * Anyway, let's be conservative and lock for now.
1649 */
1650 reiserfs_write_lock(s);
1651
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001652 jdev_name = NULL;
1653 if (reiserfs_parse_options
1654 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001655 &commit_max_age, qf_names, &qfmt) == 0) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001656 goto error;
1657 }
Jan Kara00b44192008-07-25 01:46:38 -07001658#ifdef CONFIG_QUOTA
1659 handle_quota_files(s, qf_names, &qfmt);
1660#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001662 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001663 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001664 goto error;
1665 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001667 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1668 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1669 old_format = 1;
1670 /* try new format (64-th 1k block), which can contain reiserfs super block */
1671 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001672 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001673 reiserfs_bdevname(s));
1674 goto error;
1675 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001677 rs = SB_DISK_SUPER_BLOCK(s);
1678 /* Let's do basic sanity check to verify that underlying device is not
1679 smaller than the filesystem. If the check fails then abort and scream,
1680 because bad stuff will happen otherwise. */
1681 if (s->s_bdev && s->s_bdev->bd_inode
1682 && i_size_read(s->s_bdev->bd_inode) <
1683 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001684 SWARN(silent, s, "", "Filesystem cannot be "
1685 "mounted because it is bigger than the device");
1686 SWARN(silent, s, "", "You may need to run fsck "
1687 "or increase size of your LVM partition");
1688 SWARN(silent, s, "", "Or may be you forgot to "
1689 "reboot after fdisk when it told you to");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001690 goto error;
1691 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001693 sbi->s_mount_state = SB_REISERFS_STATE(s);
1694 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695
Jeff Mahoney6f010462006-09-30 23:28:43 -07001696 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001697 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001698 goto error;
1699 }
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001700 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001702 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1703 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704#endif
1705
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001706 /* make data=ordered the default */
1707 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1708 !reiserfs_data_writeback(s)) {
1709 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 }
1711
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001712 if (reiserfs_data_log(s)) {
1713 reiserfs_info(s, "using journaled data mode\n");
1714 } else if (reiserfs_data_ordered(s)) {
1715 reiserfs_info(s, "using ordered data mode\n");
1716 } else {
1717 reiserfs_info(s, "using writeback data mode\n");
1718 }
1719 if (reiserfs_barrier_flush(s)) {
1720 printk("reiserfs: using flush barriers\n");
1721 }
1722 // set_device_ro(s->s_dev, 1) ;
1723 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001724 SWARN(silent, s, "sh-2022",
1725 "unable to initialize journal space");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001726 goto error;
1727 } else {
1728 jinit_done = 1; /* once this is set, journal_release must be called
1729 ** if we error out of the mount
1730 */
1731 }
1732 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001733 SWARN(silent, s, "jmacd-9",
1734 "unable to reread meta blocks after journal init");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001735 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736 }
1737
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001738 if (replay_only(s))
1739 goto error;
1740
1741 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001742 SWARN(silent, s, "clm-7000",
1743 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001744 s->s_flags |= MS_RDONLY;
1745 }
1746 args.objectid = REISERFS_ROOT_OBJECTID;
1747 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1748 root_inode =
1749 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1750 reiserfs_init_locked_inode, (void *)(&args));
1751 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001752 SWARN(silent, s, "jmacd-10", "get root inode failed");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001753 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 }
1755
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001756 if (root_inode->i_state & I_NEW) {
1757 reiserfs_read_locked_inode(root_inode, &args);
1758 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759 }
1760
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001761 s->s_root = d_alloc_root(root_inode);
1762 if (!s->s_root) {
1763 iput(root_inode);
1764 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001766 // define and initialize hash function
1767 sbi->s_hash_function = hash_function(s);
1768 if (sbi->s_hash_function == NULL) {
1769 dput(s->s_root);
1770 s->s_root = NULL;
1771 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001773
1774 if (is_reiserfs_3_5(rs)
1775 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1776 set_bit(REISERFS_3_5, &(sbi->s_properties));
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07001777 else if (old_format)
1778 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001779 else
1780 set_bit(REISERFS_3_6, &(sbi->s_properties));
1781
1782 if (!(s->s_flags & MS_RDONLY)) {
1783
1784 errval = journal_begin(&th, s, 1);
1785 if (errval) {
1786 dput(s->s_root);
1787 s->s_root = NULL;
1788 goto error;
1789 }
1790 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1791
1792 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1793 set_sb_fs_state(rs, 0);
1794
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001795 /* Clear out s_bmap_nr if it would wrap. We can handle this
1796 * case, but older revisions can't. This will cause the
1797 * file system to fail mount on those older implementations,
1798 * avoiding corruption. -jeffm */
1799 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1800 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001801 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001802 "claims to use %u bitmap blocks in "
1803 "its super block, but requires %u. "
1804 "Clearing to zero.", sb_bmap_nr(rs),
1805 reiserfs_bmap_count(s));
1806
1807 set_sb_bmap_nr(rs, 0);
1808 }
1809
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001810 if (old_format_only(s)) {
1811 /* filesystem of format 3.5 either with standard or non-standard
1812 journal */
1813 if (convert_reiserfs(s)) {
1814 /* and -o conv is given */
1815 if (!silent)
1816 reiserfs_info(s,
1817 "converting 3.5 filesystem to the 3.6 format");
1818
1819 if (is_reiserfs_3_5(rs))
1820 /* put magic string of 3.6 format. 2.2 will not be able to
1821 mount this filesystem anymore */
1822 memcpy(rs->s_v1.s_magic,
1823 reiserfs_3_6_magic_string,
1824 sizeof
1825 (reiserfs_3_6_magic_string));
1826
1827 set_sb_version(rs, REISERFS_VERSION_2);
1828 reiserfs_convert_objectid_map_v1(s);
1829 set_bit(REISERFS_3_6, &(sbi->s_properties));
1830 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1831 } else if (!silent) {
1832 reiserfs_info(s, "using 3.5.x disk format\n");
1833 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001834 } else
1835 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1836
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001837
1838 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1839 errval = journal_end(&th, s, 1);
1840 if (errval) {
1841 dput(s->s_root);
1842 s->s_root = NULL;
1843 goto error;
1844 }
1845
Al Viroedcc37a2009-05-03 06:00:05 -04001846 if ((errval = reiserfs_lookup_privroot(s)) ||
1847 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001848 dput(s->s_root);
1849 s->s_root = NULL;
1850 goto error;
1851 }
1852
1853 /* look for files which were to be removed in previous session */
1854 finish_unfinished(s);
1855 } else {
1856 if (old_format_only(s) && !silent) {
1857 reiserfs_info(s, "using 3.5.x disk format\n");
1858 }
1859
Al Viroedcc37a2009-05-03 06:00:05 -04001860 if ((errval = reiserfs_lookup_privroot(s)) ||
1861 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001862 dput(s->s_root);
1863 s->s_root = NULL;
1864 goto error;
1865 }
1866 }
1867 // mark hash in super block: it could be unset. overwrite should be ok
1868 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1869
1870 handle_attrs(s);
1871
1872 reiserfs_proc_info_init(s);
1873
1874 init_waitqueue_head(&(sbi->s_wait));
1875 spin_lock_init(&sbi->bitmap_lock);
1876
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001877 reiserfs_write_unlock(s);
1878
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001879 return (0);
1880
Jan Kara00b44192008-07-25 01:46:38 -07001881error:
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001882 reiserfs_write_unlock(s);
1883error_alloc:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001884 if (jinit_done) { /* kill the commit thread, free journal ram */
1885 journal_release_error(NULL, s);
1886 }
Jeff Mahoney50652272006-09-30 23:28:44 -07001887
1888 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001889 if (SB_BUFFER_WITH_SB(s))
1890 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07001892 {
1893 int j;
Jan Kara00b44192008-07-25 01:46:38 -07001894 for (j = 0; j < MAXQUOTAS; j++)
1895 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001896 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897#endif
James Lamanna833d3042005-10-30 15:00:16 -08001898 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001900 s->s_fs_info = NULL;
1901 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902}
1903
David Howells726c3342006-06-23 02:02:58 -07001904static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905{
David Howells726c3342006-06-23 02:02:58 -07001906 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001907
1908 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1909 buf->f_bfree = sb_free_blocks(rs);
1910 buf->f_bavail = buf->f_bfree;
1911 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07001912 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001913 /* changed to accommodate gcc folks. */
1914 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07001915 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
1916 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
1917 sizeof(rs->s_uuid)/2);
1918
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001919 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920}
1921
1922#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923static int reiserfs_write_dquot(struct dquot *dquot)
1924{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001925 struct reiserfs_transaction_handle th;
1926 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001928 reiserfs_write_lock(dquot->dq_sb);
1929 ret =
1930 journal_begin(&th, dquot->dq_sb,
1931 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1932 if (ret)
1933 goto out;
1934 ret = dquot_commit(dquot);
1935 err =
1936 journal_end(&th, dquot->dq_sb,
1937 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1938 if (!ret && err)
1939 ret = err;
1940 out:
1941 reiserfs_write_unlock(dquot->dq_sb);
1942 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943}
1944
1945static int reiserfs_acquire_dquot(struct dquot *dquot)
1946{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001947 struct reiserfs_transaction_handle th;
1948 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001950 reiserfs_write_lock(dquot->dq_sb);
1951 ret =
1952 journal_begin(&th, dquot->dq_sb,
1953 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1954 if (ret)
1955 goto out;
1956 ret = dquot_acquire(dquot);
1957 err =
1958 journal_end(&th, dquot->dq_sb,
1959 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1960 if (!ret && err)
1961 ret = err;
1962 out:
1963 reiserfs_write_unlock(dquot->dq_sb);
1964 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965}
1966
1967static int reiserfs_release_dquot(struct dquot *dquot)
1968{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001969 struct reiserfs_transaction_handle th;
1970 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001972 reiserfs_write_lock(dquot->dq_sb);
1973 ret =
1974 journal_begin(&th, dquot->dq_sb,
1975 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara9c3013e2007-09-11 15:23:29 -07001976 if (ret) {
1977 /* Release dquot anyway to avoid endless cycle in dqput() */
1978 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001979 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07001980 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001981 ret = dquot_release(dquot);
1982 err =
1983 journal_end(&th, dquot->dq_sb,
1984 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1985 if (!ret && err)
1986 ret = err;
1987 out:
1988 reiserfs_write_unlock(dquot->dq_sb);
1989 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990}
1991
1992static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1993{
Jan Kara45065672008-07-25 01:46:37 -07001994 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001995 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1996 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1997 dquot_mark_dquot_dirty(dquot);
1998 return reiserfs_write_dquot(dquot);
1999 } else
2000 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001}
2002
2003static int reiserfs_write_info(struct super_block *sb, int type)
2004{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002005 struct reiserfs_transaction_handle th;
2006 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002008 /* Data block + inode block */
2009 reiserfs_write_lock(sb);
2010 ret = journal_begin(&th, sb, 2);
2011 if (ret)
2012 goto out;
2013 ret = dquot_commit_info(sb, type);
2014 err = journal_end(&th, sb, 2);
2015 if (!ret && err)
2016 ret = err;
2017 out:
2018 reiserfs_write_unlock(sb);
2019 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020}
2021
2022/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002023 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 */
2025static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2026{
Christoph Hellwig84de8562005-06-23 00:09:16 -07002027 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002028 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029}
2030
2031/*
2032 * Standard function to be called on quota_on
2033 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002034static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Al Viro82646132008-08-02 00:57:06 -04002035 char *name, int remount)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002037 int err;
Al Viro82646132008-08-02 00:57:06 -04002038 struct path path;
Jan Karad5dee5c2008-04-28 02:16:23 -07002039 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002040 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002042 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2043 return -EINVAL;
Jan Kara1b445a92008-04-28 02:14:35 -07002044 /* No more checks needed? Path and format_id are bogus anyway... */
2045 if (remount)
Al Viro82646132008-08-02 00:57:06 -04002046 return vfs_quota_on(sb, type, format_id, name, 1);
2047 err = kern_path(name, LOOKUP_FOLLOW, &path);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002048 if (err)
2049 return err;
2050 /* Quotafile not on the same filesystem? */
Al Viro82646132008-08-02 00:57:06 -04002051 if (path.mnt->mnt_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002052 err = -EXDEV;
2053 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002054 }
Al Viro82646132008-08-02 00:57:06 -04002055 inode = path.dentry->d_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002056 /* We must not pack tails for quota files on reiserfs for quota IO to work */
Jan Karad5dee5c2008-04-28 02:16:23 -07002057 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2058 err = reiserfs_unpack(inode, NULL);
2059 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002060 reiserfs_warning(sb, "super-6520",
2061 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002062 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002063 err = -EINVAL;
2064 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002065 }
2066 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002067 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002068 /* Journaling quota? */
2069 if (REISERFS_SB(sb)->s_qf_names[type]) {
2070 /* Quotafile not of fs root? */
Al Viro82646132008-08-02 00:57:06 -04002071 if (path.dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002072 reiserfs_warning(sb, "super-6521",
2073 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002074 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002075 }
2076
2077 /*
2078 * When we journal data on quota file, we have to flush journal to see
2079 * all updates to the file when we bypass pagecache...
2080 */
2081 if (reiserfs_file_data_log(inode)) {
2082 /* Just start temporary transaction and finish it */
2083 err = journal_begin(&th, sb, 1);
2084 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002085 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002086 err = journal_end_sync(&th, sb, 1);
2087 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002088 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002089 }
Al Viro82646132008-08-02 00:57:06 -04002090 err = vfs_quota_on_path(sb, type, format_id, &path);
Al Viro77e69da2008-08-01 04:29:18 -04002091out:
Al Viro82646132008-08-02 00:57:06 -04002092 path_put(&path);
Al Viro77e69da2008-08-01 04:29:18 -04002093 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094}
2095
2096/* Read data from quotafile - avoid pagecache and such because we cannot afford
2097 * acquiring the locks... As quota files are never truncated and quota code
2098 * itself serializes the operations (and noone else should touch the files)
2099 * we don't have to be afraid of races */
2100static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2101 size_t len, loff_t off)
2102{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002103 struct inode *inode = sb_dqopt(sb)->files[type];
2104 unsigned long blk = off >> sb->s_blocksize_bits;
2105 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2106 size_t toread;
2107 struct buffer_head tmp_bh, *bh;
2108 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002110 if (off > i_size)
2111 return 0;
2112 if (off + len > i_size)
2113 len = i_size - off;
2114 toread = len;
2115 while (toread > 0) {
2116 tocopy =
2117 sb->s_blocksize - offset <
2118 toread ? sb->s_blocksize - offset : toread;
2119 tmp_bh.b_state = 0;
2120 /* Quota files are without tails so we can safely use this function */
2121 reiserfs_write_lock(sb);
2122 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2123 reiserfs_write_unlock(sb);
2124 if (err)
2125 return err;
2126 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2127 memset(data, 0, tocopy);
2128 else {
2129 bh = sb_bread(sb, tmp_bh.b_blocknr);
2130 if (!bh)
2131 return -EIO;
2132 memcpy(data, bh->b_data + offset, tocopy);
2133 brelse(bh);
2134 }
2135 offset = 0;
2136 toread -= tocopy;
2137 data += tocopy;
2138 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002140 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141}
2142
2143/* Write to quotafile (we know the transaction is already started and has
2144 * enough credits) */
2145static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2146 const char *data, size_t len, loff_t off)
2147{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002148 struct inode *inode = sb_dqopt(sb)->files[type];
2149 unsigned long blk = off >> sb->s_blocksize_bits;
2150 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2151 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2152 size_t towrite = len;
2153 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154
Jan Kara9c3013e2007-09-11 15:23:29 -07002155 if (!current->journal_info) {
2156 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2157 " cancelled because transaction is not started.\n",
2158 (unsigned long long)off, (unsigned long long)len);
2159 return -EIO;
2160 }
Arjan van de Ven5c81a412006-07-03 00:25:20 -07002161 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002162 while (towrite > 0) {
2163 tocopy = sb->s_blocksize - offset < towrite ?
2164 sb->s_blocksize - offset : towrite;
2165 tmp_bh.b_state = 0;
2166 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2167 if (err)
2168 goto out;
2169 if (offset || tocopy != sb->s_blocksize)
2170 bh = sb_bread(sb, tmp_bh.b_blocknr);
2171 else
2172 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2173 if (!bh) {
2174 err = -EIO;
2175 goto out;
2176 }
2177 lock_buffer(bh);
2178 memcpy(bh->b_data + offset, data, tocopy);
2179 flush_dcache_page(bh->b_page);
2180 set_buffer_uptodate(bh);
2181 unlock_buffer(bh);
2182 reiserfs_prepare_for_journal(sb, bh, 1);
2183 journal_mark_dirty(current->journal_info, sb, bh);
2184 if (!journal_quota)
2185 reiserfs_add_ordered_list(inode, bh);
2186 brelse(bh);
2187 offset = 0;
2188 towrite -= tocopy;
2189 data += tocopy;
2190 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002192out:
Jan Kara10dd08d2008-07-04 09:59:34 -07002193 if (len == towrite) {
2194 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002195 return err;
Jan Kara10dd08d2008-07-04 09:59:34 -07002196 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002197 if (inode->i_size < off + len - towrite)
2198 i_size_write(inode, off + len - towrite);
2199 inode->i_version++;
2200 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2201 mark_inode_dirty(inode);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08002202 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002203 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204}
2205
2206#endif
2207
David Howells454e2392006-06-23 02:02:57 -07002208static int get_super_block(struct file_system_type *fs_type,
2209 int flags, const char *dev_name,
2210 void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211{
David Howells454e2392006-06-23 02:02:57 -07002212 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2213 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214}
2215
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002216static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217{
2218 int ret;
2219
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002220 if ((ret = init_inodecache())) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221 return ret;
2222 }
2223
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002224 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002226 ret = register_filesystem(&reiserfs_fs_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227
2228 if (ret == 0) {
2229 return 0;
2230 }
2231
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002232 reiserfs_proc_info_global_done();
2233 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234
2235 return ret;
2236}
2237
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002238static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002240 reiserfs_proc_info_global_done();
2241 unregister_filesystem(&reiserfs_fs_type);
2242 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243}
2244
2245struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002246 .owner = THIS_MODULE,
2247 .name = "reiserfs",
2248 .get_sb = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002249 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002250 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251};
2252
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002253MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2254MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2255MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002257module_init(init_reiserfs_fs);
2258module_exit(exit_reiserfs_fs);