blob: 14363b96b6afafa74a80c2c66553c8d914064268 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
10 *
11 * NO WARRANTY
12 */
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/vmalloc.h>
17#include <linux/time.h>
18#include <asm/uaccess.h>
19#include <linux/reiserfs_fs.h>
20#include <linux/reiserfs_acl.h>
21#include <linux/reiserfs_xattr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/init.h>
23#include <linux/blkdev.h>
24#include <linux/buffer_head.h>
Christoph Hellwiga5694252007-07-17 04:04:28 -070025#include <linux/exportfs.h>
Jan Kara74abb982008-07-25 01:46:51 -070026#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/vfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/mount.h>
29#include <linux/namei.h>
Coly Li651d0622009-04-02 16:59:41 -070030#include <linux/crc32.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32struct file_system_type reiserfs_fs_type;
33
34static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
35static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
36static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
37
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070038int is_reiserfs_3_5(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070039{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070040 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
41 strlen(reiserfs_3_5_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070042}
43
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070044int is_reiserfs_3_6(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070046 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
47 strlen(reiserfs_3_6_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070048}
49
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070050int is_reiserfs_jr(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070051{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070052 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
53 strlen(reiserfs_jr_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070054}
55
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070056static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070058 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
59 is_reiserfs_jr(rs));
Linus Torvalds1da177e2005-04-16 15:20:36 -070060}
61
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070062static int reiserfs_remount(struct super_block *s, int *flags, char *data);
David Howells726c3342006-06-23 02:02:58 -070063static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070065static int reiserfs_sync_fs(struct super_block *s, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
Christoph Hellwig5af79262009-05-05 15:41:25 +020067 struct reiserfs_transaction_handle th;
68
69 reiserfs_write_lock(s);
70 if (!journal_begin(&th, s, 1))
71 if (!journal_end_sync(&th, s, 1))
72 reiserfs_flush_old_commits(s);
73 s->s_dirt = 0; /* Even if it's not true.
74 * We'll loop forever in sync_supers otherwise */
75 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070076 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
78
79static void reiserfs_write_super(struct super_block *s)
80{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070081 reiserfs_sync_fs(s, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082}
83
Takashi Satoc4be0c12009-01-09 16:40:58 -080084static int reiserfs_freeze(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070086 struct reiserfs_transaction_handle th;
87 reiserfs_write_lock(s);
88 if (!(s->s_flags & MS_RDONLY)) {
89 int err = journal_begin(&th, s, 1);
90 if (err) {
91 reiserfs_block_writes(&th);
92 } else {
93 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
94 1);
95 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
96 reiserfs_block_writes(&th);
97 journal_end_sync(&th, s, 1);
98 }
99 }
100 s->s_dirt = 0;
101 reiserfs_write_unlock(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800102 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103}
104
Takashi Satoc4be0c12009-01-09 16:40:58 -0800105static int reiserfs_unfreeze(struct super_block *s)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700106{
107 reiserfs_allow_writes(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800108 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109}
110
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700111extern const struct in_core_key MAX_IN_CORE_KEY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113/* this is used to delete "save link" when there are no items of a
114 file it points to. It can either happen if unlink is completed but
115 "save unlink" removal, or if file has both unlink and truncate
116 pending and as unlink completes first (because key of "save link"
117 protecting unlink is bigger that a key lf "save link" which
118 protects truncate), so there left no items to make truncate
119 completion on */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700120static int remove_save_link_only(struct super_block *s,
121 struct reiserfs_key *key, int oid_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700123 struct reiserfs_transaction_handle th;
124 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700126 /* we are going to do one balancing */
127 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
128 if (err)
129 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700131 reiserfs_delete_solid_item(&th, NULL, key);
132 if (oid_free)
133 /* removals are protected by direct items */
134 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
135
136 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139#ifdef CONFIG_QUOTA
140static int reiserfs_quota_on_mount(struct super_block *, int);
141#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143/* look for uncompleted unlinks and truncates and complete them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700144static int finish_unfinished(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700146 INITIALIZE_PATH(path);
147 struct cpu_key max_cpu_key, obj_key;
Lepton Wufb46f342007-10-16 23:30:04 -0700148 struct reiserfs_key save_link_key, last_inode_key;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700149 int retval = 0;
150 struct item_head *ih;
151 struct buffer_head *bh;
152 int item_pos;
153 char *item;
154 int done;
155 struct inode *inode;
156 int truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700158 int i;
159 int ms_active_set;
Jan Karaf4b113a2010-05-21 19:12:51 +0200160 int quota_enabled[MAXQUOTAS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700162
163 /* compose key to look for "save" links */
164 max_cpu_key.version = KEY_FORMAT_3_5;
165 max_cpu_key.on_disk_key.k_dir_id = ~0U;
166 max_cpu_key.on_disk_key.k_objectid = ~0U;
167 set_cpu_key_k_offset(&max_cpu_key, ~0U);
168 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Lepton Wufb46f342007-10-16 23:30:04 -0700170 memset(&last_inode_key, 0, sizeof(last_inode_key));
171
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700173 /* Needed for iput() to work correctly and not trash data */
174 if (s->s_flags & MS_ACTIVE) {
175 ms_active_set = 0;
176 } else {
177 ms_active_set = 1;
178 s->s_flags |= MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700180 /* Turn on quotas so that they are updated correctly */
181 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200182 quota_enabled[i] = 1;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700183 if (REISERFS_SB(s)->s_qf_names[i]) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200184 int ret;
185
186 if (sb_has_quota_active(s, i)) {
187 quota_enabled[i] = 0;
188 continue;
189 }
190 ret = reiserfs_quota_on_mount(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700191 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400192 reiserfs_warning(s, "reiserfs-2500",
193 "cannot turn on journaled "
194 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700195 }
196 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700199 done = 0;
200 REISERFS_SB(s)->s_is_unlinked_ok = 1;
201 while (!retval) {
202 retval = search_item(s, &max_cpu_key, &path);
203 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400204 reiserfs_error(s, "vs-2140",
205 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700206 break;
207 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700209 bh = get_last_bh(&path);
210 item_pos = get_item_pos(&path);
211 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400212 reiserfs_warning(s, "vs-2060",
213 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700214 break;
215 }
216 item_pos--;
217 ih = B_N_PITEM_HEAD(bh, item_pos);
218
219 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
220 /* there are no "save" links anymore */
221 break;
222
223 save_link_key = ih->ih_key;
224 if (is_indirect_le_ih(ih))
225 truncate = 1;
226 else
227 truncate = 0;
228
229 /* reiserfs_iget needs k_dirid and k_objectid only */
230 item = B_I_PITEM(bh, ih);
231 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
232 obj_key.on_disk_key.k_objectid =
233 le32_to_cpu(ih->ih_key.k_objectid);
234 obj_key.on_disk_key.k_offset = 0;
235 obj_key.on_disk_key.k_type = 0;
236
237 pathrelse(&path);
238
239 inode = reiserfs_iget(s, &obj_key);
240 if (!inode) {
241 /* the unlink almost completed, it just did not manage to remove
242 "save" link and release objectid */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400243 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700244 &obj_key);
245 retval = remove_save_link_only(s, &save_link_key, 1);
246 continue;
247 }
248
249 if (!truncate && inode->i_nlink) {
250 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400251 reiserfs_warning(s, "vs-2185",
252 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700253 &obj_key);
254 retval = remove_save_link_only(s, &save_link_key, 0);
255 continue;
256 }
Christoph Hellwig871a2932010-03-03 09:05:07 -0500257 dquot_initialize(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700258
259 if (truncate && S_ISDIR(inode->i_mode)) {
260 /* We got a truncate request for a dir which is impossible.
261 The only imaginable way is to execute unfinished truncate request
262 then boot into old kernel, remove the file and create dir with
263 the same key. */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400264 reiserfs_warning(s, "green-2101",
265 "impossible truncate on a "
266 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700267 INODE_PKEY(inode));
268 retval = remove_save_link_only(s, &save_link_key, 0);
269 truncate = 0;
270 iput(inode);
271 continue;
272 }
273
274 if (truncate) {
275 REISERFS_I(inode)->i_flags |=
276 i_link_saved_truncate_mask;
277 /* not completed truncate found. New size was committed together
278 with "save" link */
279 reiserfs_info(s, "Truncating %k to %Ld ..",
280 INODE_PKEY(inode), inode->i_size);
281 reiserfs_truncate_file(inode,
282 0
283 /*don't update modification time */
284 );
285 retval = remove_save_link(inode, truncate);
286 } else {
287 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
288 /* not completed unlink (rmdir) found */
289 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700290 if (memcmp(&last_inode_key, INODE_PKEY(inode),
291 sizeof(last_inode_key))){
292 last_inode_key = *INODE_PKEY(inode);
293 /* removal gets completed in iput */
294 retval = 0;
295 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400296 reiserfs_warning(s, "super-2189", "Dead loop "
297 "in finish_unfinished "
298 "detected, just remove "
299 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700300 retval = remove_save_link_only(s,
301 &save_link_key, 0);
302 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700303 }
304
305 iput(inode);
306 printk("done\n");
307 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700309 REISERFS_SB(s)->s_is_unlinked_ok = 0;
310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700312 /* Turn quotas off */
313 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200314 if (sb_dqopt(s)->files[i] && quota_enabled[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400315 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700316 }
317 if (ms_active_set)
318 /* Restore the flag back */
319 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700321 pathrelse(&path);
322 if (done)
323 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
324 "Completed\n", done);
325 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328/* to protect file being unlinked from getting lost we "safe" link files
329 being unlinked. This link will be deleted in the same transaction with last
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200330 item of file. mounting the filesystem we scan all these links and remove
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 files which almost got lost */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700332void add_save_link(struct reiserfs_transaction_handle *th,
333 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700335 INITIALIZE_PATH(path);
336 int retval;
337 struct cpu_key key;
338 struct item_head ih;
339 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700341 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700343 /* file can only get one "save link" of each kind */
344 RFALSE(truncate &&
345 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
346 "saved link already exists for truncated inode %lx",
347 (long)inode->i_ino);
348 RFALSE(!truncate &&
349 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
350 "saved link already exists for unlinked inode %lx",
351 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700353 /* setup key of "save" link */
354 key.version = KEY_FORMAT_3_5;
355 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
356 key.on_disk_key.k_objectid = inode->i_ino;
357 if (!truncate) {
358 /* unlink, rmdir, rename */
359 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
360 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700362 /* item head of "safe" link */
363 make_le_item_head(&ih, &key, key.version,
364 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
365 4 /*length */ , 0xffff /*free space */ );
366 } else {
367 /* truncate */
368 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400369 reiserfs_warning(inode->i_sb, "green-2102",
370 "Adding a truncate savelink for "
371 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700372 INODE_PKEY(inode));
373 set_cpu_key_k_offset(&key, 1);
374 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700376 /* item head of "safe" link */
377 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
378 4 /*length */ , 0 /*free space */ );
379 }
380 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700382 /* look for its place in the tree */
383 retval = search_item(inode->i_sb, &key, &path);
384 if (retval != ITEM_NOT_FOUND) {
385 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400386 reiserfs_error(inode->i_sb, "vs-2100",
387 "search_by_key (%K) returned %d", &key,
388 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700389 pathrelse(&path);
390 return;
391 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700393 /* body of "save" link */
394 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300396 /* put "save" link into tree, don't charge quota to anyone */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700397 retval =
398 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
399 if (retval) {
400 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400401 reiserfs_error(inode->i_sb, "vs-2120",
402 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700403 } else {
404 if (truncate)
405 REISERFS_I(inode)->i_flags |=
406 i_link_saved_truncate_mask;
407 else
408 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
409 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410}
411
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700413int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700415 struct reiserfs_transaction_handle th;
416 struct reiserfs_key key;
417 int err;
418
419 /* we are going to do one balancing only */
420 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
421 if (err)
422 return err;
423
424 /* setup key of "save" link */
425 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
426 key.k_objectid = INODE_PKEY(inode)->k_objectid;
427 if (!truncate) {
428 /* unlink, rmdir, rename */
429 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
430 1 + inode->i_sb->s_blocksize);
431 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
432 } else {
433 /* truncate */
434 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
435 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
436 }
437
438 if ((truncate &&
439 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
440 (!truncate &&
441 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
442 /* don't take quota bytes from anywhere */
443 reiserfs_delete_solid_item(&th, NULL, &key);
444 if (!truncate) {
445 reiserfs_release_objectid(&th, inode->i_ino);
446 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
447 } else
448 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
449
450 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451}
452
David Howellsedc666e2006-10-11 01:22:14 -0700453static void reiserfs_kill_sb(struct super_block *s)
454{
455 if (REISERFS_SB(s)) {
456 if (REISERFS_SB(s)->xattr_root) {
457 d_invalidate(REISERFS_SB(s)->xattr_root);
458 dput(REISERFS_SB(s)->xattr_root);
459 REISERFS_SB(s)->xattr_root = NULL;
460 }
David Howellsedc666e2006-10-11 01:22:14 -0700461 if (REISERFS_SB(s)->priv_root) {
462 d_invalidate(REISERFS_SB(s)->priv_root);
463 dput(REISERFS_SB(s)->priv_root);
464 REISERFS_SB(s)->priv_root = NULL;
465 }
466 }
467
468 kill_block_super(s);
469}
470
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700471static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700473 struct reiserfs_transaction_handle th;
474 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400476 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
477
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200478 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200479
Christoph Hellwig8c85e122009-04-28 18:00:26 +0200480 if (s->s_dirt)
481 reiserfs_write_super(s);
482
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700483 /* change file system state to current state if it was mounted with read-write permissions */
484 if (!(s->s_flags & MS_RDONLY)) {
485 if (!journal_begin(&th, s, 10)) {
486 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
487 1);
488 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
489 REISERFS_SB(s)->s_mount_state);
490 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
491 }
492 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700494 /* note, journal_release checks for readonly mount, and can decide not
495 ** to do a journal_end
496 */
497 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
Jeff Mahoney50652272006-09-30 23:28:44 -0700499 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700501 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700503 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700505 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400506 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700507 REISERFS_SB(s)->reserved_blocks);
508 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700510 reiserfs_proc_info_done(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200512 reiserfs_write_unlock(s);
513 mutex_destroy(&REISERFS_SB(s)->lock);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700514 kfree(s->s_fs_info);
515 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516}
517
Christoph Lametere18b8902006-12-06 20:33:20 -0800518static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520static struct inode *reiserfs_alloc_inode(struct super_block *sb)
521{
522 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700523 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800524 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (!ei)
526 return NULL;
Al Viro0e4f6a72010-07-04 12:18:57 +0400527 atomic_set(&ei->openers, 0);
528 mutex_init(&ei->tailpack);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 return &ei->vfs_inode;
530}
531
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100532static void reiserfs_i_callback(struct rcu_head *head)
533{
534 struct inode *inode = container_of(head, struct inode, i_rcu);
535 INIT_LIST_HEAD(&inode->i_dentry);
536 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
537}
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539static void reiserfs_destroy_inode(struct inode *inode)
540{
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100541 call_rcu(&inode->i_rcu, reiserfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542}
543
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700544static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700546 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Christoph Lametera35afb82007-05-16 22:10:57 -0700548 INIT_LIST_HEAD(&ei->i_prealloc_list);
549 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700551
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552static int init_inodecache(void)
553{
554 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700555 sizeof(struct
556 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800557 0, (SLAB_RECLAIM_ACCOUNT|
558 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900559 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 if (reiserfs_inode_cachep == NULL)
561 return -ENOMEM;
562 return 0;
563}
564
565static void destroy_inodecache(void)
566{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700567 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568}
569
570/* we don't mark inodes dirty, we just log them */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400571static void reiserfs_dirty_inode(struct inode *inode, int flags)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700572{
573 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700575 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200576 int lock_depth;
577
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700578 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400579 reiserfs_warning(inode->i_sb, "clm-6006",
580 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700581 inode->i_ino);
582 return;
583 }
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200584 lock_depth = reiserfs_write_lock_once(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700586 /* this is really only used for atime updates, so they don't have
587 ** to be included in O_SYNC or fsync
588 */
589 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200590 if (err)
591 goto out;
592
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700593 reiserfs_update_sd(&th, inode);
594 journal_end(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200595
596out:
597 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598}
599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700601static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
602 size_t, loff_t);
603static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
604 loff_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605#endif
606
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800607static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700608 .alloc_inode = reiserfs_alloc_inode,
609 .destroy_inode = reiserfs_destroy_inode,
610 .write_inode = reiserfs_write_inode,
611 .dirty_inode = reiserfs_dirty_inode,
Al Viro845a2cc2010-06-07 11:37:37 -0400612 .evict_inode = reiserfs_evict_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700613 .put_super = reiserfs_put_super,
614 .write_super = reiserfs_write_super,
615 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800616 .freeze_fs = reiserfs_freeze,
617 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700618 .statfs = reiserfs_statfs,
619 .remount_fs = reiserfs_remount,
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -0800620 .show_options = generic_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700622 .quota_read = reiserfs_quota_read,
623 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624#endif
625};
626
627#ifdef CONFIG_QUOTA
628#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
629
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630static int reiserfs_write_dquot(struct dquot *);
631static int reiserfs_acquire_dquot(struct dquot *);
632static int reiserfs_release_dquot(struct dquot *);
633static int reiserfs_mark_dquot_dirty(struct dquot *);
634static int reiserfs_write_info(struct super_block *, int);
Jan Karaf00c9e42010-09-15 17:38:58 +0200635static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700637static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700638 .write_dquot = reiserfs_write_dquot,
639 .acquire_dquot = reiserfs_acquire_dquot,
640 .release_dquot = reiserfs_release_dquot,
641 .mark_dirty = reiserfs_mark_dquot_dirty,
642 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100643 .alloc_dquot = dquot_alloc,
644 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645};
646
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700647static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700648 .quota_on = reiserfs_quota_on,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400649 .quota_off = dquot_quota_off,
650 .quota_sync = dquot_quota_sync,
651 .get_info = dquot_get_dqinfo,
652 .set_info = dquot_set_dqinfo,
653 .get_dqblk = dquot_get_dqblk,
654 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655};
656#endif
657
Christoph Hellwig39655162007-10-21 16:42:17 -0700658static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700659 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700660 .fh_to_dentry = reiserfs_fh_to_dentry,
661 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700662 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700663};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
665/* this struct is used in reiserfs_getopt () for containing the value for those
666 mount options that have values rather than being toggles. */
667typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700668 char *value;
669 int setmask; /* bitmask which is to set on mount_options bitmask when this
670 value is found, 0 is no bits are to be changed. */
671 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
672 value is found, 0 is no bits are to be changed. This is
673 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674} arg_desc_t;
675
676/* Set this bit in arg_required to allow empty arguments */
677#define REISERFS_OPT_ALLOWEMPTY 31
678
679/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
680 mount options */
681typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700682 char *option_name;
683 int arg_required; /* 0 if argument is not required, not 0 otherwise */
684 const arg_desc_t *values; /* list of values accepted by an option */
685 int setmask; /* bitmask which is to set on mount_options bitmask when this
686 value is found, 0 is no bits are to be changed. */
687 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
688 value is found, 0 is no bits are to be changed. This is
689 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690} opt_desc_t;
691
692/* possible values for -o data= */
693static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700694 {"ordered", 1 << REISERFS_DATA_ORDERED,
695 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
696 {"journal", 1 << REISERFS_DATA_LOG,
697 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
698 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
699 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800700 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701};
702
703/* possible values for -o barrier= */
704static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700705 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
706 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800707 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708};
709
710/* possible values for "-o block-allocator=" and bits which are to be set in
711 s_mount_opt of reiserfs specific part of in-core super block */
712static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700713 {"noborder", 1 << REISERFS_NO_BORDER, 0},
714 {"border", 0, 1 << REISERFS_NO_BORDER},
715 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
716 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
717 {"test4", 1 << REISERFS_TEST4, 0},
718 {"notest4", 0, 1 << REISERFS_TEST4},
719 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720};
721
722static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700723 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
724 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
725 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
726 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727};
728
729static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700730 {"panic", 1 << REISERFS_ERROR_PANIC,
731 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
732 {"ro-remount", 1 << REISERFS_ERROR_RO,
733 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700735 {"continue", 1 << REISERFS_ERROR_CONTINUE,
736 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700738 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739};
740
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741/* proceed only one option from a list *cur - string containing of mount options
742 opts - array of options which are accepted
743 opt_arg - if option is found and requires an argument and if it is specifed
744 in the input - pointer to the argument is stored here
745 bit_flags - if option requires to set a certain bit - it is set here
746 return -1 if unknown option is found, opt->arg_required otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700747static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
748 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700750 char *p;
Jeff Mahoney0222e652009-03-30 14:02:44 -0400751 /* foo=bar,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700752 ^ ^ ^
753 | | +-- option_end
754 | +-- arg_start
755 +-- option_start
756 */
757 const opt_desc_t *opt;
758 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700760 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700762 /* assume argument cannot contain commas */
763 *cur = strchr(p, ',');
764 if (*cur) {
765 *(*cur) = '\0';
766 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700769 if (!strncmp(p, "alloc=", 6)) {
770 /* Ugly special case, probably we should redo options parser so that
771 it can understand several arguments for some options, also so that
772 it can fill several bitfields with option values. */
773 if (reiserfs_parse_alloc_options(s, p + 6)) {
774 return -1;
775 } else {
776 return 0;
777 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700779
780 /* for every option in the list */
781 for (opt = opts; opt->option_name; opt++) {
782 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
783 if (bit_flags) {
784 if (opt->clrmask ==
785 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400786 reiserfs_warning(s, "super-6500",
787 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700788 p);
789 else
790 *bit_flags &= ~opt->clrmask;
791 if (opt->setmask ==
792 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400793 reiserfs_warning(s, "super-6501",
794 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700795 p);
796 else
797 *bit_flags |= opt->setmask;
798 }
799 break;
800 }
801 }
802 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400803 reiserfs_warning(s, "super-6502",
804 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700805 return -1;
806 }
807
808 p += strlen(opt->option_name);
809 switch (*p) {
810 case '=':
811 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400812 reiserfs_warning(s, "super-6503",
813 "the option \"%s\" does not "
814 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700815 opt->option_name);
816 return -1;
817 }
818 break;
819
820 case 0:
821 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400822 reiserfs_warning(s, "super-6504",
823 "the option \"%s\" requires an "
824 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700825 return -1;
826 }
827 break;
828 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400829 reiserfs_warning(s, "super-6505",
830 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700831 opt->option_name);
832 return -1;
833 }
834
835 /* move to the argument, or to next option if argument is not required */
836 p++;
837
838 if (opt->arg_required
839 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
840 && !strlen(p)) {
841 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400842 reiserfs_warning(s, "super-6506",
843 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700844 opt->option_name);
845 return -1;
846 }
847
848 if (!opt->values) {
849 /* *=NULLopt_arg contains pointer to argument */
850 *opt_arg = p;
851 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
852 }
853
854 /* values possible for this option are listed in opt->values */
855 for (arg = opt->values; arg->value; arg++) {
856 if (!strcmp(p, arg->value)) {
857 if (bit_flags) {
858 *bit_flags &= ~arg->clrmask;
859 *bit_flags |= arg->setmask;
860 }
861 return opt->arg_required;
862 }
863 }
864
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400865 reiserfs_warning(s, "super-6506",
866 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700867 opt->option_name);
868 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869}
870
871/* returns 0 if something is wrong in option string, 1 - otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700872static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
873 unsigned long *mount_options,
874 /* after the parsing phase, contains the
875 collection of bitflags defining what
876 mount options were selected. */
877 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
878 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -0700879 unsigned int *commit_max_age,
880 char **qf_names,
881 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700883 int c;
884 char *arg = NULL;
885 char *pos;
886 opt_desc_t opts[] = {
887 /* Compatibility stuff, so that -o notail for old setups still work */
888 {"tails",.arg_required = 't',.values = tails},
889 {"notail",.clrmask =
890 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
891 {"conv",.setmask = 1 << REISERFS_CONVERT},
892 {"attrs",.setmask = 1 << REISERFS_ATTRS},
893 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -0400894 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700896 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
897 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700899 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
900 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901#endif
902#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700903 {"acl",.setmask = 1 << REISERFS_POSIXACL},
904 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700906 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
907 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800909 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700910 {"replayonly",.setmask = 1 << REPLAYONLY},
911 {"block-allocator",.arg_required = 'a',.values = balloc},
912 {"data",.arg_required = 'd',.values = logging_mode},
913 {"barrier",.arg_required = 'b',.values = barrier_mode},
914 {"resize",.arg_required = 'r',.values = NULL},
915 {"jdev",.arg_required = 'j',.values = NULL},
916 {"nolargeio",.arg_required = 'w',.values = NULL},
917 {"commit",.arg_required = 'c',.values = NULL},
918 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
919 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
920 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
921 {"errors",.arg_required = 'e',.values = error_actions},
922 {"usrjquota",.arg_required =
923 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
924 {"grpjquota",.arg_required =
925 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
926 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800927 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700928 };
929
930 *blocks = 0;
931 if (!options || !*options)
932 /* use default configuration: create tails, journaling on, no
933 conversion to newest format */
934 return 1;
935
936 for (pos = options; pos;) {
937 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
938 if (c == -1)
939 /* wrong option is given */
940 return 0;
941
942 if (c == 'r') {
943 char *p;
944
945 p = NULL;
946 /* "resize=NNN" or "resize=auto" */
947
948 if (!strcmp(arg, "auto")) {
949 /* From JFS code, to auto-get the size. */
950 *blocks =
951 s->s_bdev->bd_inode->i_size >> s->
952 s_blocksize_bits;
953 } else {
954 *blocks = simple_strtoul(arg, &p, 0);
955 if (*p != '\0') {
956 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400957 reiserfs_warning(s, "super-6507",
958 "bad value %s for "
959 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700960 return 0;
961 }
962 }
963 }
964
965 if (c == 'c') {
966 char *p = NULL;
967 unsigned long val = simple_strtoul(arg, &p, 0);
968 /* commit=NNN (time in seconds) */
969 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400970 reiserfs_warning(s, "super-6508",
971 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700972 arg);
973 return 0;
974 }
975 *commit_max_age = (unsigned int)val;
976 }
977
978 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400979 reiserfs_warning(s, "super-6509", "nolargeio option "
980 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -0700981 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700982 }
983
984 if (c == 'j') {
985 if (arg && *arg && jdev_name) {
986 if (*jdev_name) { //Hm, already assigned?
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400987 reiserfs_warning(s, "super-6510",
988 "journal device was "
989 "already specified to "
990 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700991 return 0;
992 }
993 *jdev_name = arg;
994 }
995 }
996#ifdef CONFIG_QUOTA
997 if (c == 'u' || c == 'g') {
998 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
999
Jan Kara6929f892008-08-20 18:16:36 +02001000 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001001 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001002 reiserfs_warning(s, "super-6511",
1003 "cannot change journaled "
1004 "quota options when quota "
1005 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001006 return 0;
1007 }
1008 if (*arg) { /* Some filename specified? */
1009 if (REISERFS_SB(s)->s_qf_names[qtype]
1010 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1011 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001012 reiserfs_warning(s, "super-6512",
1013 "%s quota file "
1014 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001015 QTYPE2NAME(qtype));
1016 return 0;
1017 }
1018 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001019 reiserfs_warning(s, "super-6513",
1020 "quotafile must be "
1021 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001022 return 0;
1023 }
Jan Kara00b44192008-07-25 01:46:38 -07001024 qf_names[qtype] =
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001025 kmalloc(strlen(arg) + 1, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001026 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001027 reiserfs_warning(s, "reiserfs-2502",
1028 "not enough memory "
1029 "for storing "
1030 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001031 return 0;
1032 }
Jan Kara00b44192008-07-25 01:46:38 -07001033 strcpy(qf_names[qtype], arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001034 *mount_options |= 1 << REISERFS_QUOTA;
1035 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001036 if (qf_names[qtype] !=
1037 REISERFS_SB(s)->s_qf_names[qtype])
1038 kfree(qf_names[qtype]);
1039 qf_names[qtype] = NULL;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001040 }
1041 }
1042 if (c == 'f') {
1043 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001044 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001045 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001046 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001047 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001048 reiserfs_warning(s, "super-6514",
1049 "unknown quota format "
1050 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001051 return 0;
1052 }
Jan Kara6929f892008-08-20 18:16:36 +02001053 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001054 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001055 reiserfs_warning(s, "super-6515",
1056 "cannot change journaled "
1057 "quota options when quota "
1058 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001059 return 0;
1060 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001061 }
1062#else
1063 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001064 reiserfs_warning(s, "reiserfs-2503", "journaled "
1065 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001066 return 0;
1067 }
1068#endif
1069 }
1070
1071#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001072 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1073 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001074 reiserfs_warning(s, "super-6515",
1075 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001076 return 0;
1077 }
1078 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1079 if (!(*mount_options & (1 << REISERFS_QUOTA))
Jan Kara6929f892008-08-20 18:16:36 +02001080 && sb_any_quota_loaded(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001081 reiserfs_warning(s, "super-6516", "quota options must "
1082 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001083 return 0;
1084 }
1085#endif
1086
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088}
1089
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001090static void switch_data_mode(struct super_block *s, unsigned long mode)
1091{
1092 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1093 (1 << REISERFS_DATA_ORDERED) |
1094 (1 << REISERFS_DATA_WRITEBACK));
1095 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096}
1097
1098static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1099{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001100 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1101 if (!reiserfs_data_log(s)) {
1102 switch_data_mode(s, REISERFS_DATA_LOG);
1103 reiserfs_info(s, "switching to journaled data mode\n");
1104 }
1105 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1106 if (!reiserfs_data_ordered(s)) {
1107 switch_data_mode(s, REISERFS_DATA_ORDERED);
1108 reiserfs_info(s, "switching to ordered data mode\n");
1109 }
1110 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1111 if (!reiserfs_data_writeback(s)) {
1112 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1113 reiserfs_info(s, "switching to writeback data mode\n");
1114 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116}
1117
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001118static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001120 int flush = (1 << REISERFS_BARRIER_FLUSH);
1121 int none = (1 << REISERFS_BARRIER_NONE);
1122 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001124 if (bits & all_barrier) {
1125 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1126 if (bits & flush) {
1127 REISERFS_SB(s)->s_mount_opt |= flush;
1128 printk("reiserfs: enabling write barrier flush mode\n");
1129 } else if (bits & none) {
1130 REISERFS_SB(s)->s_mount_opt |= none;
1131 printk("reiserfs: write barriers turned off\n");
1132 }
1133 }
1134}
1135
1136static void handle_attrs(struct super_block *s)
1137{
1138 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1139
1140 if (reiserfs_attrs(s)) {
1141 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001142 reiserfs_warning(s, "super-6517", "cannot support "
1143 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001144 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 return;
1146 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001147 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001148 reiserfs_warning(s, "super-6518", "cannot support "
1149 "attributes until flag is set in "
1150 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001151 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 }
1153 }
1154}
1155
Jan Kara00b44192008-07-25 01:46:38 -07001156#ifdef CONFIG_QUOTA
1157static void handle_quota_files(struct super_block *s, char **qf_names,
1158 unsigned int *qfmt)
1159{
1160 int i;
1161
1162 for (i = 0; i < MAXQUOTAS; i++) {
1163 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1164 kfree(REISERFS_SB(s)->s_qf_names[i]);
1165 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1166 }
1167 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1168}
1169#endif
1170
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001171static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001173 struct reiserfs_super_block *rs;
1174 struct reiserfs_transaction_handle th;
1175 unsigned long blocks;
1176 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1177 unsigned long safe_mask = 0;
1178 unsigned int commit_max_age = (unsigned int)-1;
1179 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001180 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001181 int err;
Jan Kara00b44192008-07-25 01:46:38 -07001182 char *qf_names[MAXQUOTAS];
1183 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001185 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001186#endif
Jan Kara00b44192008-07-25 01:46:38 -07001187
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001188 reiserfs_write_lock(s);
1189
1190#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001191 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192#endif
1193
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001194 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001196 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001197 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1198 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001200 for (i = 0; i < MAXQUOTAS; i++)
1201 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1202 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001203#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001204 err = -EINVAL;
1205 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 }
Jan Kara00b44192008-07-25 01:46:38 -07001207#ifdef CONFIG_QUOTA
1208 handle_quota_files(s, qf_names, &qfmt);
1209#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001211 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001213 /* Add options that are safe here */
1214 safe_mask |= 1 << REISERFS_SMALLTAIL;
1215 safe_mask |= 1 << REISERFS_LARGETAIL;
1216 safe_mask |= 1 << REISERFS_NO_BORDER;
1217 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1218 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1219 safe_mask |= 1 << REISERFS_TEST4;
1220 safe_mask |= 1 << REISERFS_ATTRS;
1221 safe_mask |= 1 << REISERFS_XATTRS_USER;
1222 safe_mask |= 1 << REISERFS_POSIXACL;
1223 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1224 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1225 safe_mask |= 1 << REISERFS_ERROR_RO;
1226 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1227 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1228 safe_mask |= 1 << REISERFS_QUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001230 /* Update the bitmask, taking care to keep
1231 * the bits we're not allowed to change here */
1232 REISERFS_SB(s)->s_mount_opt =
1233 (REISERFS_SB(s)->
1234 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001236 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1237 journal->j_max_commit_age = commit_max_age;
1238 journal->j_max_trans_age = commit_max_age;
1239 } else if (commit_max_age == 0) {
1240 /* 0 means restore defaults. */
1241 journal->j_max_commit_age = journal->j_default_max_commit_age;
1242 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1243 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001245 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001246 err = reiserfs_resize(s, blocks);
1247 if (err != 0)
1248 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001249 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001251 if (*mount_flags & MS_RDONLY) {
1252 reiserfs_xattr_init(s, *mount_flags);
1253 /* remount read-only */
1254 if (s->s_flags & MS_RDONLY)
1255 /* it is read-only already */
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001256 goto out_ok;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001257
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001258 err = dquot_suspend(s, -1);
1259 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001260 goto out_err;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001261
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001262 /* try to remount file system with read-only permissions */
1263 if (sb_umount_state(rs) == REISERFS_VALID_FS
1264 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001265 goto out_ok;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001266 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001268 err = journal_begin(&th, s, 10);
1269 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001270 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001272 /* Mounting a rw partition read-only. */
1273 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1274 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1275 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1276 } else {
1277 /* remount read-write */
1278 if (!(s->s_flags & MS_RDONLY)) {
1279 reiserfs_xattr_init(s, *mount_flags);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001280 goto out_ok; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001281 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001283 if (reiserfs_is_journal_aborted(journal)) {
1284 err = journal->j_errno;
1285 goto out_err;
1286 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001288 handle_data_mode(s, mount_options);
1289 handle_barrier_mode(s, mount_options);
1290 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1291 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1292 err = journal_begin(&th, s, 10);
1293 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001294 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001296 /* Mount a partition which is read-only, read-write */
1297 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1298 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1299 s->s_flags &= ~MS_RDONLY;
1300 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001301 if (!old_format_only(s))
1302 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001303 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1304 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1305 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1306 }
1307 /* this will force a full flush of all journal lists */
1308 SB_JOURNAL(s)->j_must_wait = 1;
1309 err = journal_end(&th, s, 10);
1310 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001311 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001312 s->s_dirt = 0;
1313
1314 if (!(*mount_flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001315 dquot_resume(s, -1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001316 finish_unfinished(s);
1317 reiserfs_xattr_init(s, *mount_flags);
1318 }
1319
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001320out_ok:
Al Viro2a32ceb2009-05-08 16:05:57 -04001321 replace_mount_options(s, new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001322 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001323 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001324
1325out_err:
1326 kfree(new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001327 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001328 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329}
1330
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001331static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001333 struct buffer_head *bh;
1334 struct reiserfs_super_block *rs;
1335 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001337 bh = sb_bread(s, offset / s->s_blocksize);
1338 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001339 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001340 "bread failed (dev %s, block %lu, size %lu)",
1341 reiserfs_bdevname(s), offset / s->s_blocksize,
1342 s->s_blocksize);
1343 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001346 rs = (struct reiserfs_super_block *)bh->b_data;
1347 if (!is_any_reiserfs_magic_string(rs)) {
1348 brelse(bh);
1349 return 1;
1350 }
1351 //
1352 // ok, reiserfs signature (old or new) found in at the given offset
Jeff Mahoney0222e652009-03-30 14:02:44 -04001353 //
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001354 fs_blocksize = sb_blocksize(rs);
1355 brelse(bh);
1356 sb_set_blocksize(s, fs_blocksize);
1357
1358 bh = sb_bread(s, offset / s->s_blocksize);
1359 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001360 reiserfs_warning(s, "sh-2007",
1361 "bread failed (dev %s, block %lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001362 reiserfs_bdevname(s), offset / s->s_blocksize,
1363 s->s_blocksize);
1364 return 1;
1365 }
1366
1367 rs = (struct reiserfs_super_block *)bh->b_data;
1368 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001369 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1370 "filesystem on (dev %s, block %Lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001371 reiserfs_bdevname(s),
1372 (unsigned long long)bh->b_blocknr,
1373 s->s_blocksize);
1374 brelse(bh);
1375 return 1;
1376 }
1377
1378 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1379 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001380 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1381 "--rebuild-tree run detected. Please run\n"
1382 "reiserfsck --rebuild-tree and wait for a "
1383 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001384 "get newer reiserfsprogs package");
1385 return 1;
1386 }
1387
1388 SB_BUFFER_WITH_SB(s) = bh;
1389 SB_DISK_SUPER_BLOCK(s) = rs;
1390
1391 if (is_reiserfs_jr(rs)) {
1392 /* magic is of non-standard journal filesystem, look at s_version to
1393 find which format is in use */
1394 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001395 reiserfs_info(s, "found reiserfs format \"3.6\""
1396 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001397 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001398 reiserfs_info(s, "found reiserfs format \"3.5\""
1399 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001400 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001401 reiserfs_warning(s, "sh-2012", "found unknown "
1402 "format \"%u\" of reiserfs with "
1403 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001404 return 1;
1405 }
1406 } else
1407 /* s_version of standard format may contain incorrect information,
1408 so we just look at the magic string */
1409 reiserfs_info(s,
1410 "found reiserfs format \"%s\" with standard journal\n",
1411 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1412
1413 s->s_op = &reiserfs_sops;
1414 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001416 s->s_qcop = &reiserfs_qctl_operations;
1417 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418#endif
1419
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001420 /* new format is limited by the 32 bit wide i_blocks field, want to
1421 ** be one full block below that.
1422 */
1423 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1424 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425}
1426
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001428static int reread_meta_blocks(struct super_block *s)
1429{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001430 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001431 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001432 wait_on_buffer(SB_BUFFER_WITH_SB(s));
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001433 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001434 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001435 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001436 return 1;
1437 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001439 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440}
1441
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442/////////////////////////////////////////////////////
1443// hash detection stuff
1444
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445// if root directory is empty - we set default - Yura's - hash and
1446// warn about it
1447// FIXME: we look for only one name in a directory. If tea and yura
1448// bith have the same value - we ask user to send report to the
1449// mailing list
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001450static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001452 int retval;
1453 struct inode *inode;
1454 struct cpu_key key;
1455 INITIALIZE_PATH(path);
1456 struct reiserfs_dir_entry de;
1457 __u32 hash = DEFAULT_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001459 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001461 do { // Some serious "goto"-hater was there ;)
1462 u32 teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001464 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1465 retval = search_by_entry_key(s, &key, &path, &de);
1466 if (retval == IO_ERROR) {
1467 pathrelse(&path);
1468 return UNSET_HASH;
1469 }
1470 if (retval == NAME_NOT_FOUND)
1471 de.de_entry_num--;
1472 set_de_name_and_namelen(&de);
1473 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1474 /* allow override in this case */
1475 if (reiserfs_rupasov_hash(s)) {
1476 hash = YURA_HASH;
1477 }
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001478 reiserfs_info(s, "FS seems to be empty, autodetect "
1479 "is using the default hash\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001480 break;
1481 }
1482 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1483 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1484 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1485 if (((teahash == r5hash)
1486 &&
1487 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1488 == r5hash)) || ((teahash == yurahash)
1489 && (yurahash ==
1490 GET_HASH_VALUE(deh_offset
1491 (&
1492 (de.
1493 de_deh[de.
1494 de_entry_num])))))
1495 || ((r5hash == yurahash)
1496 && (yurahash ==
1497 GET_HASH_VALUE(deh_offset
1498 (&(de.de_deh[de.de_entry_num])))))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001499 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1500 "automatically detect hash function. "
1501 "Please mount with -o "
1502 "hash={tea,rupasov,r5}");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001503 hash = UNSET_HASH;
1504 break;
1505 }
1506 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1507 yurahash)
1508 hash = YURA_HASH;
1509 else if (GET_HASH_VALUE
1510 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1511 hash = TEA_HASH;
1512 else if (GET_HASH_VALUE
1513 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1514 hash = R5_HASH;
1515 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001516 reiserfs_warning(s, "reiserfs-2506",
1517 "Unrecognised hash function");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001518 hash = UNSET_HASH;
1519 }
1520 } while (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001522 pathrelse(&path);
1523 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524}
1525
1526// finds out which hash names are sorted with
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001527static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001529 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001531 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001533 /* reiserfs_hash_detect() == true if any of the hash mount options
1534 ** were used. We must check them to make sure the user isn't
1535 ** using a bad hash value
1536 */
1537 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1538 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001540 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney0222e652009-03-30 14:02:44 -04001541 /* detection has found the hash, and we must check against the
1542 ** mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001543 */
1544 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001545 reiserfs_warning(s, "reiserfs-2507",
1546 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001547 "unable to force rupasov hash",
1548 reiserfs_hashname(code));
1549 code = UNSET_HASH;
1550 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001551 reiserfs_warning(s, "reiserfs-2508",
1552 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001553 "unable to force tea hash",
1554 reiserfs_hashname(code));
1555 code = UNSET_HASH;
1556 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001557 reiserfs_warning(s, "reiserfs-2509",
1558 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001559 "unable to force r5 hash",
1560 reiserfs_hashname(code));
1561 code = UNSET_HASH;
1562 }
1563 } else {
1564 /* find_hash_out was not called or could not determine the hash */
1565 if (reiserfs_rupasov_hash(s)) {
1566 code = YURA_HASH;
1567 } else if (reiserfs_tea_hash(s)) {
1568 code = TEA_HASH;
1569 } else if (reiserfs_r5_hash(s)) {
1570 code = R5_HASH;
1571 }
1572 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573
Jeff Mahoney0222e652009-03-30 14:02:44 -04001574 /* if we are mounted RW, and we have a new valid hash code, update
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001575 ** the super
1576 */
1577 if (code != UNSET_HASH &&
1578 !(s->s_flags & MS_RDONLY) &&
1579 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1580 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1581 }
1582 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583}
1584
1585// return pointer to appropriate function
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001586static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001588 switch (what_hash(s)) {
1589 case TEA_HASH:
1590 reiserfs_info(s, "Using tea hash to sort names\n");
1591 return keyed_hash;
1592 case YURA_HASH:
1593 reiserfs_info(s, "Using rupasov hash to sort names\n");
1594 return yura_hash;
1595 case R5_HASH:
1596 reiserfs_info(s, "Using r5 hash to sort names\n");
1597 return r5_hash;
1598 }
1599 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600}
1601
1602// this is used to set up correct value for old partitions
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001603static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001605 if (func == keyed_hash)
1606 return TEA_HASH;
1607 if (func == yura_hash)
1608 return YURA_HASH;
1609 if (func == r5_hash)
1610 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001612 BUG(); // should never happen
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001614 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615}
1616
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001617#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001619 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001621static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001623 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001624 struct reiserfs_transaction_handle th;
1625 int old_format = 0;
1626 unsigned long blocks;
1627 unsigned int commit_max_age = 0;
1628 int jinit_done = 0;
1629 struct reiserfs_iget_args args;
1630 struct reiserfs_super_block *rs;
1631 char *jdev_name;
1632 struct reiserfs_sb_info *sbi;
1633 int errval = -EINVAL;
Jan Kara00b44192008-07-25 01:46:38 -07001634 char *qf_names[MAXQUOTAS] = {};
1635 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001637 save_mount_options(s, data);
1638
Yan Burman01afb212006-12-06 20:39:01 -08001639 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001640 if (!sbi)
1641 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001642 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001643 /* Set default values for options: non-aggressive tails, RO on errors */
1644 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1645 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
Christoph Hellwigb4d5b102011-07-16 16:47:00 -04001646 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001647 /* no preallocation minimum, be smart in
1648 reiserfs_file_write instead */
1649 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1650 /* Preallocate by 16 blocks (17-1) at once */
1651 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001652 /* setup default block allocator options */
1653 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001655 mutex_init(&REISERFS_SB(s)->lock);
1656 REISERFS_SB(s)->lock_depth = -1;
1657
1658 /*
1659 * This function is called with the bkl, which also was the old
1660 * locking used here.
1661 * do_journal_begin() will soon check if we hold the lock (ie: was the
1662 * bkl). This is likely because do_journal_begin() has several another
1663 * callers because at this time, it doesn't seem to be necessary to
1664 * protect against anything.
1665 * Anyway, let's be conservative and lock for now.
1666 */
1667 reiserfs_write_lock(s);
1668
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001669 jdev_name = NULL;
1670 if (reiserfs_parse_options
1671 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001672 &commit_max_age, qf_names, &qfmt) == 0) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001673 goto error;
1674 }
Jan Kara00b44192008-07-25 01:46:38 -07001675#ifdef CONFIG_QUOTA
1676 handle_quota_files(s, qf_names, &qfmt);
1677#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001679 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001680 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001681 goto error;
1682 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001684 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1685 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1686 old_format = 1;
1687 /* try new format (64-th 1k block), which can contain reiserfs super block */
1688 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001689 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001690 reiserfs_bdevname(s));
1691 goto error;
1692 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001694 rs = SB_DISK_SUPER_BLOCK(s);
1695 /* Let's do basic sanity check to verify that underlying device is not
1696 smaller than the filesystem. If the check fails then abort and scream,
1697 because bad stuff will happen otherwise. */
1698 if (s->s_bdev && s->s_bdev->bd_inode
1699 && i_size_read(s->s_bdev->bd_inode) <
1700 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001701 SWARN(silent, s, "", "Filesystem cannot be "
1702 "mounted because it is bigger than the device");
1703 SWARN(silent, s, "", "You may need to run fsck "
1704 "or increase size of your LVM partition");
1705 SWARN(silent, s, "", "Or may be you forgot to "
1706 "reboot after fdisk when it told you to");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001707 goto error;
1708 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001710 sbi->s_mount_state = SB_REISERFS_STATE(s);
1711 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712
Jeff Mahoney6f010462006-09-30 23:28:43 -07001713 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001714 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001715 goto error;
1716 }
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001717 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001719 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1720 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721#endif
1722
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001723 /* make data=ordered the default */
1724 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1725 !reiserfs_data_writeback(s)) {
1726 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 }
1728
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001729 if (reiserfs_data_log(s)) {
1730 reiserfs_info(s, "using journaled data mode\n");
1731 } else if (reiserfs_data_ordered(s)) {
1732 reiserfs_info(s, "using ordered data mode\n");
1733 } else {
1734 reiserfs_info(s, "using writeback data mode\n");
1735 }
1736 if (reiserfs_barrier_flush(s)) {
1737 printk("reiserfs: using flush barriers\n");
1738 }
1739 // set_device_ro(s->s_dev, 1) ;
1740 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001741 SWARN(silent, s, "sh-2022",
1742 "unable to initialize journal space");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001743 goto error;
1744 } else {
1745 jinit_done = 1; /* once this is set, journal_release must be called
1746 ** if we error out of the mount
1747 */
1748 }
1749 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001750 SWARN(silent, s, "jmacd-9",
1751 "unable to reread meta blocks after journal init");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001752 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 }
1754
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001755 if (replay_only(s))
1756 goto error;
1757
1758 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001759 SWARN(silent, s, "clm-7000",
1760 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001761 s->s_flags |= MS_RDONLY;
1762 }
1763 args.objectid = REISERFS_ROOT_OBJECTID;
1764 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1765 root_inode =
1766 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1767 reiserfs_init_locked_inode, (void *)(&args));
1768 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001769 SWARN(silent, s, "jmacd-10", "get root inode failed");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001770 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 }
1772
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001773 if (root_inode->i_state & I_NEW) {
1774 reiserfs_read_locked_inode(root_inode, &args);
1775 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 }
1777
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001778 s->s_root = d_alloc_root(root_inode);
1779 if (!s->s_root) {
1780 iput(root_inode);
1781 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001783 // define and initialize hash function
1784 sbi->s_hash_function = hash_function(s);
1785 if (sbi->s_hash_function == NULL) {
1786 dput(s->s_root);
1787 s->s_root = NULL;
1788 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001790
1791 if (is_reiserfs_3_5(rs)
1792 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1793 set_bit(REISERFS_3_5, &(sbi->s_properties));
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07001794 else if (old_format)
1795 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001796 else
1797 set_bit(REISERFS_3_6, &(sbi->s_properties));
1798
1799 if (!(s->s_flags & MS_RDONLY)) {
1800
1801 errval = journal_begin(&th, s, 1);
1802 if (errval) {
1803 dput(s->s_root);
1804 s->s_root = NULL;
1805 goto error;
1806 }
1807 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1808
1809 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1810 set_sb_fs_state(rs, 0);
1811
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001812 /* Clear out s_bmap_nr if it would wrap. We can handle this
1813 * case, but older revisions can't. This will cause the
1814 * file system to fail mount on those older implementations,
1815 * avoiding corruption. -jeffm */
1816 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1817 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001818 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001819 "claims to use %u bitmap blocks in "
1820 "its super block, but requires %u. "
1821 "Clearing to zero.", sb_bmap_nr(rs),
1822 reiserfs_bmap_count(s));
1823
1824 set_sb_bmap_nr(rs, 0);
1825 }
1826
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001827 if (old_format_only(s)) {
1828 /* filesystem of format 3.5 either with standard or non-standard
1829 journal */
1830 if (convert_reiserfs(s)) {
1831 /* and -o conv is given */
1832 if (!silent)
1833 reiserfs_info(s,
1834 "converting 3.5 filesystem to the 3.6 format");
1835
1836 if (is_reiserfs_3_5(rs))
1837 /* put magic string of 3.6 format. 2.2 will not be able to
1838 mount this filesystem anymore */
1839 memcpy(rs->s_v1.s_magic,
1840 reiserfs_3_6_magic_string,
1841 sizeof
1842 (reiserfs_3_6_magic_string));
1843
1844 set_sb_version(rs, REISERFS_VERSION_2);
1845 reiserfs_convert_objectid_map_v1(s);
1846 set_bit(REISERFS_3_6, &(sbi->s_properties));
1847 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1848 } else if (!silent) {
1849 reiserfs_info(s, "using 3.5.x disk format\n");
1850 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001851 } else
1852 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1853
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001854
1855 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1856 errval = journal_end(&th, s, 1);
1857 if (errval) {
1858 dput(s->s_root);
1859 s->s_root = NULL;
1860 goto error;
1861 }
1862
Al Viroedcc37a2009-05-03 06:00:05 -04001863 if ((errval = reiserfs_lookup_privroot(s)) ||
1864 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001865 dput(s->s_root);
1866 s->s_root = NULL;
1867 goto error;
1868 }
1869
1870 /* look for files which were to be removed in previous session */
1871 finish_unfinished(s);
1872 } else {
1873 if (old_format_only(s) && !silent) {
1874 reiserfs_info(s, "using 3.5.x disk format\n");
1875 }
1876
Al Viroedcc37a2009-05-03 06:00:05 -04001877 if ((errval = reiserfs_lookup_privroot(s)) ||
1878 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001879 dput(s->s_root);
1880 s->s_root = NULL;
1881 goto error;
1882 }
1883 }
1884 // mark hash in super block: it could be unset. overwrite should be ok
1885 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1886
1887 handle_attrs(s);
1888
1889 reiserfs_proc_info_init(s);
1890
1891 init_waitqueue_head(&(sbi->s_wait));
1892 spin_lock_init(&sbi->bitmap_lock);
1893
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001894 reiserfs_write_unlock(s);
1895
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001896 return (0);
1897
Jan Kara00b44192008-07-25 01:46:38 -07001898error:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001899 if (jinit_done) { /* kill the commit thread, free journal ram */
1900 journal_release_error(NULL, s);
1901 }
Jeff Mahoney50652272006-09-30 23:28:44 -07001902
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001903 reiserfs_write_unlock(s);
1904
Jeff Mahoney50652272006-09-30 23:28:44 -07001905 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001906 if (SB_BUFFER_WITH_SB(s))
1907 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07001909 {
1910 int j;
Jan Kara00b44192008-07-25 01:46:38 -07001911 for (j = 0; j < MAXQUOTAS; j++)
1912 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001913 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914#endif
James Lamanna833d3042005-10-30 15:00:16 -08001915 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001917 s->s_fs_info = NULL;
1918 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919}
1920
David Howells726c3342006-06-23 02:02:58 -07001921static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922{
David Howells726c3342006-06-23 02:02:58 -07001923 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001924
1925 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1926 buf->f_bfree = sb_free_blocks(rs);
1927 buf->f_bavail = buf->f_bfree;
1928 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07001929 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001930 /* changed to accommodate gcc folks. */
1931 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07001932 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
1933 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
1934 sizeof(rs->s_uuid)/2);
1935
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001936 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937}
1938
1939#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940static int reiserfs_write_dquot(struct dquot *dquot)
1941{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001942 struct reiserfs_transaction_handle th;
1943 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001945 reiserfs_write_lock(dquot->dq_sb);
1946 ret =
1947 journal_begin(&th, dquot->dq_sb,
1948 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1949 if (ret)
1950 goto out;
1951 ret = dquot_commit(dquot);
1952 err =
1953 journal_end(&th, dquot->dq_sb,
1954 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1955 if (!ret && err)
1956 ret = err;
1957 out:
1958 reiserfs_write_unlock(dquot->dq_sb);
1959 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960}
1961
1962static int reiserfs_acquire_dquot(struct dquot *dquot)
1963{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001964 struct reiserfs_transaction_handle th;
1965 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001967 reiserfs_write_lock(dquot->dq_sb);
1968 ret =
1969 journal_begin(&th, dquot->dq_sb,
1970 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1971 if (ret)
1972 goto out;
1973 ret = dquot_acquire(dquot);
1974 err =
1975 journal_end(&th, dquot->dq_sb,
1976 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1977 if (!ret && err)
1978 ret = err;
1979 out:
1980 reiserfs_write_unlock(dquot->dq_sb);
1981 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982}
1983
1984static int reiserfs_release_dquot(struct dquot *dquot)
1985{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001986 struct reiserfs_transaction_handle th;
1987 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001989 reiserfs_write_lock(dquot->dq_sb);
1990 ret =
1991 journal_begin(&th, dquot->dq_sb,
1992 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara9c3013e2007-09-11 15:23:29 -07001993 if (ret) {
1994 /* Release dquot anyway to avoid endless cycle in dqput() */
1995 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001996 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07001997 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001998 ret = dquot_release(dquot);
1999 err =
2000 journal_end(&th, dquot->dq_sb,
2001 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2002 if (!ret && err)
2003 ret = err;
2004 out:
2005 reiserfs_write_unlock(dquot->dq_sb);
2006 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007}
2008
2009static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2010{
Jan Kara45065672008-07-25 01:46:37 -07002011 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002012 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2013 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2014 dquot_mark_dquot_dirty(dquot);
2015 return reiserfs_write_dquot(dquot);
2016 } else
2017 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018}
2019
2020static int reiserfs_write_info(struct super_block *sb, int type)
2021{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002022 struct reiserfs_transaction_handle th;
2023 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002025 /* Data block + inode block */
2026 reiserfs_write_lock(sb);
2027 ret = journal_begin(&th, sb, 2);
2028 if (ret)
2029 goto out;
2030 ret = dquot_commit_info(sb, type);
2031 err = journal_end(&th, sb, 2);
2032 if (!ret && err)
2033 ret = err;
2034 out:
2035 reiserfs_write_unlock(sb);
2036 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037}
2038
2039/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002040 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 */
2042static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2043{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002044 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2045 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046}
2047
2048/*
2049 * Standard function to be called on quota_on
2050 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002051static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Jan Karaf00c9e42010-09-15 17:38:58 +02002052 struct path *path)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002054 int err;
Jan Karad5dee5c2008-04-28 02:16:23 -07002055 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002056 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002058 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2059 return -EINVAL;
Christoph Hellwig307ae182010-05-19 07:16:43 -04002060
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002061 /* Quotafile not on the same filesystem? */
Jan Karaf00c9e42010-09-15 17:38:58 +02002062 if (path->mnt->mnt_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002063 err = -EXDEV;
2064 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002065 }
Jan Karaf00c9e42010-09-15 17:38:58 +02002066 inode = path->dentry->d_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002067 /* We must not pack tails for quota files on reiserfs for quota IO to work */
Jan Karad5dee5c2008-04-28 02:16:23 -07002068 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2069 err = reiserfs_unpack(inode, NULL);
2070 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002071 reiserfs_warning(sb, "super-6520",
2072 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002073 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002074 err = -EINVAL;
2075 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002076 }
2077 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002078 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002079 /* Journaling quota? */
2080 if (REISERFS_SB(sb)->s_qf_names[type]) {
2081 /* Quotafile not of fs root? */
Jan Karaf00c9e42010-09-15 17:38:58 +02002082 if (path->dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002083 reiserfs_warning(sb, "super-6521",
2084 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002085 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002086 }
2087
2088 /*
2089 * When we journal data on quota file, we have to flush journal to see
2090 * all updates to the file when we bypass pagecache...
2091 */
2092 if (reiserfs_file_data_log(inode)) {
2093 /* Just start temporary transaction and finish it */
2094 err = journal_begin(&th, sb, 1);
2095 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002096 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002097 err = journal_end_sync(&th, sb, 1);
2098 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002099 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002100 }
Jan Karaf00c9e42010-09-15 17:38:58 +02002101 err = dquot_quota_on(sb, type, format_id, path);
Al Viro77e69da2008-08-01 04:29:18 -04002102out:
Al Viro77e69da2008-08-01 04:29:18 -04002103 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104}
2105
2106/* Read data from quotafile - avoid pagecache and such because we cannot afford
2107 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002108 * itself serializes the operations (and no one else should touch the files)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109 * we don't have to be afraid of races */
2110static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2111 size_t len, loff_t off)
2112{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002113 struct inode *inode = sb_dqopt(sb)->files[type];
2114 unsigned long blk = off >> sb->s_blocksize_bits;
2115 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2116 size_t toread;
2117 struct buffer_head tmp_bh, *bh;
2118 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002120 if (off > i_size)
2121 return 0;
2122 if (off + len > i_size)
2123 len = i_size - off;
2124 toread = len;
2125 while (toread > 0) {
2126 tocopy =
2127 sb->s_blocksize - offset <
2128 toread ? sb->s_blocksize - offset : toread;
2129 tmp_bh.b_state = 0;
2130 /* Quota files are without tails so we can safely use this function */
2131 reiserfs_write_lock(sb);
2132 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2133 reiserfs_write_unlock(sb);
2134 if (err)
2135 return err;
2136 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2137 memset(data, 0, tocopy);
2138 else {
2139 bh = sb_bread(sb, tmp_bh.b_blocknr);
2140 if (!bh)
2141 return -EIO;
2142 memcpy(data, bh->b_data + offset, tocopy);
2143 brelse(bh);
2144 }
2145 offset = 0;
2146 toread -= tocopy;
2147 data += tocopy;
2148 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002150 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151}
2152
2153/* Write to quotafile (we know the transaction is already started and has
2154 * enough credits) */
2155static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2156 const char *data, size_t len, loff_t off)
2157{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002158 struct inode *inode = sb_dqopt(sb)->files[type];
2159 unsigned long blk = off >> sb->s_blocksize_bits;
2160 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2161 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2162 size_t towrite = len;
2163 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164
Jan Kara9c3013e2007-09-11 15:23:29 -07002165 if (!current->journal_info) {
2166 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2167 " cancelled because transaction is not started.\n",
2168 (unsigned long long)off, (unsigned long long)len);
2169 return -EIO;
2170 }
Arjan van de Ven5c81a412006-07-03 00:25:20 -07002171 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002172 while (towrite > 0) {
2173 tocopy = sb->s_blocksize - offset < towrite ?
2174 sb->s_blocksize - offset : towrite;
2175 tmp_bh.b_state = 0;
2176 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2177 if (err)
2178 goto out;
2179 if (offset || tocopy != sb->s_blocksize)
2180 bh = sb_bread(sb, tmp_bh.b_blocknr);
2181 else
2182 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2183 if (!bh) {
2184 err = -EIO;
2185 goto out;
2186 }
2187 lock_buffer(bh);
2188 memcpy(bh->b_data + offset, data, tocopy);
2189 flush_dcache_page(bh->b_page);
2190 set_buffer_uptodate(bh);
2191 unlock_buffer(bh);
2192 reiserfs_prepare_for_journal(sb, bh, 1);
2193 journal_mark_dirty(current->journal_info, sb, bh);
2194 if (!journal_quota)
2195 reiserfs_add_ordered_list(inode, bh);
2196 brelse(bh);
2197 offset = 0;
2198 towrite -= tocopy;
2199 data += tocopy;
2200 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002202out:
Jan Kara10dd08d2008-07-04 09:59:34 -07002203 if (len == towrite) {
2204 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002205 return err;
Jan Kara10dd08d2008-07-04 09:59:34 -07002206 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002207 if (inode->i_size < off + len - towrite)
2208 i_size_write(inode, off + len - towrite);
2209 inode->i_version++;
2210 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2211 mark_inode_dirty(inode);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08002212 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002213 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214}
2215
2216#endif
2217
Al Viro152a0832010-07-25 00:46:55 +04002218static struct dentry *get_super_block(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -07002219 int flags, const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04002220 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221{
Al Viro152a0832010-07-25 00:46:55 +04002222 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223}
2224
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002225static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002226{
2227 int ret;
2228
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002229 if ((ret = init_inodecache())) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 return ret;
2231 }
2232
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002233 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002235 ret = register_filesystem(&reiserfs_fs_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236
2237 if (ret == 0) {
2238 return 0;
2239 }
2240
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002241 reiserfs_proc_info_global_done();
2242 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243
2244 return ret;
2245}
2246
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002247static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002249 reiserfs_proc_info_global_done();
2250 unregister_filesystem(&reiserfs_fs_type);
2251 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252}
2253
2254struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002255 .owner = THIS_MODULE,
2256 .name = "reiserfs",
Al Viro152a0832010-07-25 00:46:55 +04002257 .mount = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002258 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002259 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260};
2261
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002262MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2263MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2264MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002266module_init(init_reiserfs_fs);
2267module_exit(exit_reiserfs_fs);