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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>
Fabian Frederick170939912014-08-08 14:21:12 -070018#include <linux/uaccess.h>
Al Virof466c6f2012-03-17 01:16:43 -040019#include "reiserfs.h"
Al Viroa3063ab2012-03-17 01:03:10 -040020#include "acl.h"
Al Viroc45ac882012-03-17 00:59:06 -040021#include "xattr.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/init.h>
23#include <linux/blkdev.h>
Tejun Heo66114ca2015-05-22 17:13:32 -040024#include <linux/backing-dev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/buffer_head.h>
Christoph Hellwiga5694252007-07-17 04:04:28 -070026#include <linux/exportfs.h>
Jan Kara74abb982008-07-25 01:46:51 -070027#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/vfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/mount.h>
30#include <linux/namei.h>
Coly Li651d0622009-04-02 16:59:41 -070031#include <linux/crc32.h>
Jan Karac3aa0772011-12-21 20:17:10 +010032#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
34struct file_system_type reiserfs_fs_type;
35
36static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
37static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
38static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
39
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070040int is_reiserfs_3_5(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070042 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
43 strlen(reiserfs_3_5_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070044}
45
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070046int is_reiserfs_3_6(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070048 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
49 strlen(reiserfs_3_6_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070050}
51
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070052int is_reiserfs_jr(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070053{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070054 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
55 strlen(reiserfs_jr_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070056}
57
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070058static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070060 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
61 is_reiserfs_jr(rs));
Linus Torvalds1da177e2005-04-16 15:20:36 -070062}
63
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070064static int reiserfs_remount(struct super_block *s, int *flags, char *data);
David Howells726c3342006-06-23 02:02:58 -070065static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070067static int reiserfs_sync_fs(struct super_block *s, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068{
Christoph Hellwig5af79262009-05-05 15:41:25 +020069 struct reiserfs_transaction_handle th;
70
Jan Karaa1177822012-07-03 16:45:29 +020071 /*
72 * Writeback quota in non-journalled quota case - journalled quota has
73 * no dirty dquots
74 */
75 dquot_writeback_dquots(s, -1);
Christoph Hellwig5af79262009-05-05 15:41:25 +020076 reiserfs_write_lock(s);
77 if (!journal_begin(&th, s, 1))
Jeff Mahoney58d85422014-04-23 10:00:38 -040078 if (!journal_end_sync(&th))
Christoph Hellwig5af79262009-05-05 15:41:25 +020079 reiserfs_flush_old_commits(s);
Christoph Hellwig5af79262009-05-05 15:41:25 +020080 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070081 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082}
83
Artem Bityutskiy033369d2012-06-01 17:18:08 +030084static void flush_old_commits(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Artem Bityutskiy033369d2012-06-01 17:18:08 +030086 struct reiserfs_sb_info *sbi;
87 struct super_block *s;
88
89 sbi = container_of(work, struct reiserfs_sb_info, old_work.work);
90 s = sbi->s_journal->j_work_sb;
91
Jan Kara1e0e6532017-04-05 14:17:30 +020092 /*
93 * We need s_umount for protecting quota writeback. We have to use
94 * trylock as reiserfs_cancel_old_flush() may be waiting for this work
95 * to complete with s_umount held.
96 */
97 if (!down_read_trylock(&s->s_umount)) {
98 /* Requeue work if we are not cancelling it */
99 spin_lock(&sbi->old_work_lock);
100 if (sbi->work_queued == 1)
101 queue_delayed_work(system_long_wq, &sbi->old_work, HZ);
102 spin_unlock(&sbi->old_work_lock);
103 return;
104 }
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300105 spin_lock(&sbi->old_work_lock);
Jan Kara71b05762017-04-05 14:09:48 +0200106 /* Avoid clobbering the cancel state... */
107 if (sbi->work_queued == 1)
108 sbi->work_queued = 0;
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300109 spin_unlock(&sbi->old_work_lock);
110
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700111 reiserfs_sync_fs(s, 1);
Jan Kara1e0e6532017-04-05 14:17:30 +0200112 up_read(&s->s_umount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113}
114
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300115void reiserfs_schedule_old_flush(struct super_block *s)
116{
117 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
118 unsigned long delay;
119
Jan Kara01777832014-08-06 19:43:56 +0200120 /*
121 * Avoid scheduling flush when sb is being shut down. It can race
122 * with journal shutdown and free still queued delayed work.
123 */
Linus Torvalds1751e8a2017-11-27 13:05:09 -0800124 if (sb_rdonly(s) || !(s->s_flags & SB_ACTIVE))
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300125 return;
126
127 spin_lock(&sbi->old_work_lock);
128 if (!sbi->work_queued) {
129 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
130 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
131 sbi->work_queued = 1;
132 }
133 spin_unlock(&sbi->old_work_lock);
134}
135
Jan Kara71b05762017-04-05 14:09:48 +0200136void reiserfs_cancel_old_flush(struct super_block *s)
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300137{
138 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
139
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300140 spin_lock(&sbi->old_work_lock);
Jan Kara71b05762017-04-05 14:09:48 +0200141 /* Make sure no new flushes will be queued */
142 sbi->work_queued = 2;
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300143 spin_unlock(&sbi->old_work_lock);
Jan Kara71b05762017-04-05 14:09:48 +0200144 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300145}
146
Takashi Satoc4be0c12009-01-09 16:40:58 -0800147static int reiserfs_freeze(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700149 struct reiserfs_transaction_handle th;
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300150
Jan Kara71b05762017-04-05 14:09:48 +0200151 reiserfs_cancel_old_flush(s);
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300152
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700153 reiserfs_write_lock(s);
David Howellsbc98a422017-07-17 08:45:34 +0100154 if (!sb_rdonly(s)) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700155 int err = journal_begin(&th, s, 1);
156 if (err) {
157 reiserfs_block_writes(&th);
158 } else {
159 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
160 1);
Jeff Mahoney09f1b802014-04-23 10:00:39 -0400161 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700162 reiserfs_block_writes(&th);
Jeff Mahoney58d85422014-04-23 10:00:38 -0400163 journal_end_sync(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700164 }
165 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700166 reiserfs_write_unlock(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800167 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168}
169
Takashi Satoc4be0c12009-01-09 16:40:58 -0800170static int reiserfs_unfreeze(struct super_block *s)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700171{
Jan Kara71b05762017-04-05 14:09:48 +0200172 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
173
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700174 reiserfs_allow_writes(s);
Jan Kara71b05762017-04-05 14:09:48 +0200175 spin_lock(&sbi->old_work_lock);
176 /* Allow old_work to run again */
177 sbi->work_queued = 0;
178 spin_unlock(&sbi->old_work_lock);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800179 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180}
181
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700182extern const struct in_core_key MAX_IN_CORE_KEY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Jeff Mahoney098297b2014-04-23 10:00:36 -0400184/*
185 * this is used to delete "save link" when there are no items of a
186 * file it points to. It can either happen if unlink is completed but
187 * "save unlink" removal, or if file has both unlink and truncate
188 * pending and as unlink completes first (because key of "save link"
189 * protecting unlink is bigger that a key lf "save link" which
190 * protects truncate), so there left no items to make truncate
191 * completion on
192 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700193static int remove_save_link_only(struct super_block *s,
194 struct reiserfs_key *key, int oid_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700196 struct reiserfs_transaction_handle th;
197 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700199 /* we are going to do one balancing */
200 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
201 if (err)
202 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700204 reiserfs_delete_solid_item(&th, NULL, key);
205 if (oid_free)
206 /* removals are protected by direct items */
207 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
208
Jeff Mahoney58d85422014-04-23 10:00:38 -0400209 return journal_end(&th);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212#ifdef CONFIG_QUOTA
213static int reiserfs_quota_on_mount(struct super_block *, int);
214#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700215
Mike Galbraith420902c2012-08-13 15:21:23 +0200216/*
217 * Look for uncompleted unlinks and truncates and complete them
218 *
219 * Called with superblock write locked. If quotas are enabled, we have to
220 * release/retake lest we call dquot_quota_on_mount(), proceed to
221 * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per
222 * cpu worklets to complete flush_async_commits() that in turn wait for the
223 * superblock write lock.
224 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700225static int finish_unfinished(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700227 INITIALIZE_PATH(path);
228 struct cpu_key max_cpu_key, obj_key;
Lepton Wufb46f342007-10-16 23:30:04 -0700229 struct reiserfs_key save_link_key, last_inode_key;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700230 int retval = 0;
231 struct item_head *ih;
232 struct buffer_head *bh;
233 int item_pos;
234 char *item;
235 int done;
236 struct inode *inode;
237 int truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700239 int i;
240 int ms_active_set;
Jan Karaaca60612014-09-10 20:57:45 +0200241 int quota_enabled[REISERFS_MAXQUOTAS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700243
244 /* compose key to look for "save" links */
245 max_cpu_key.version = KEY_FORMAT_3_5;
246 max_cpu_key.on_disk_key.k_dir_id = ~0U;
247 max_cpu_key.on_disk_key.k_objectid = ~0U;
248 set_cpu_key_k_offset(&max_cpu_key, ~0U);
249 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Lepton Wufb46f342007-10-16 23:30:04 -0700251 memset(&last_inode_key, 0, sizeof(last_inode_key));
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700254 /* Needed for iput() to work correctly and not trash data */
Linus Torvalds1751e8a2017-11-27 13:05:09 -0800255 if (s->s_flags & SB_ACTIVE) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700256 ms_active_set = 0;
257 } else {
258 ms_active_set = 1;
Linus Torvalds1751e8a2017-11-27 13:05:09 -0800259 s->s_flags |= SB_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700261 /* Turn on quotas so that they are updated correctly */
Jan Karaaca60612014-09-10 20:57:45 +0200262 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200263 quota_enabled[i] = 1;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700264 if (REISERFS_SB(s)->s_qf_names[i]) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200265 int ret;
266
267 if (sb_has_quota_active(s, i)) {
268 quota_enabled[i] = 0;
269 continue;
270 }
Mike Galbraith420902c2012-08-13 15:21:23 +0200271 reiserfs_write_unlock(s);
Jan Karaf4b113a2010-05-21 19:12:51 +0200272 ret = reiserfs_quota_on_mount(s, i);
Mike Galbraith420902c2012-08-13 15:21:23 +0200273 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700274 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400275 reiserfs_warning(s, "reiserfs-2500",
276 "cannot turn on journaled "
277 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700278 }
279 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700282 done = 0;
283 REISERFS_SB(s)->s_is_unlinked_ok = 1;
284 while (!retval) {
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400285 int depth;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700286 retval = search_item(s, &max_cpu_key, &path);
287 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400288 reiserfs_error(s, "vs-2140",
289 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700290 break;
291 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700293 bh = get_last_bh(&path);
294 item_pos = get_item_pos(&path);
295 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400296 reiserfs_warning(s, "vs-2060",
297 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700298 break;
299 }
300 item_pos--;
Jeff Mahoney4cf5f7a2014-04-23 10:00:35 -0400301 ih = item_head(bh, item_pos);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700302
303 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
304 /* there are no "save" links anymore */
305 break;
306
307 save_link_key = ih->ih_key;
308 if (is_indirect_le_ih(ih))
309 truncate = 1;
310 else
311 truncate = 0;
312
313 /* reiserfs_iget needs k_dirid and k_objectid only */
Jeff Mahoney4cf5f7a2014-04-23 10:00:35 -0400314 item = ih_item_body(bh, ih);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700315 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
316 obj_key.on_disk_key.k_objectid =
317 le32_to_cpu(ih->ih_key.k_objectid);
318 obj_key.on_disk_key.k_offset = 0;
319 obj_key.on_disk_key.k_type = 0;
320
321 pathrelse(&path);
322
323 inode = reiserfs_iget(s, &obj_key);
Sudip Mukherjeeff7d0802016-01-21 16:40:36 -0800324 if (IS_ERR_OR_NULL(inode)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -0400325 /*
326 * the unlink almost completed, it just did not
327 * manage to remove "save" link and release objectid
328 */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400329 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700330 &obj_key);
331 retval = remove_save_link_only(s, &save_link_key, 1);
332 continue;
333 }
334
335 if (!truncate && inode->i_nlink) {
336 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400337 reiserfs_warning(s, "vs-2185",
338 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700339 &obj_key);
340 retval = remove_save_link_only(s, &save_link_key, 0);
341 continue;
342 }
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400343 depth = reiserfs_write_unlock_nested(inode->i_sb);
Christoph Hellwig871a2932010-03-03 09:05:07 -0500344 dquot_initialize(inode);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400345 reiserfs_write_lock_nested(inode->i_sb, depth);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700346
347 if (truncate && S_ISDIR(inode->i_mode)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -0400348 /*
349 * We got a truncate request for a dir which
350 * is impossible. The only imaginable way is to
351 * execute unfinished truncate request then boot
352 * into old kernel, remove the file and create dir
353 * with the same key.
354 */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400355 reiserfs_warning(s, "green-2101",
356 "impossible truncate on a "
357 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700358 INODE_PKEY(inode));
359 retval = remove_save_link_only(s, &save_link_key, 0);
360 truncate = 0;
361 iput(inode);
362 continue;
363 }
364
365 if (truncate) {
366 REISERFS_I(inode)->i_flags |=
367 i_link_saved_truncate_mask;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400368 /*
369 * not completed truncate found. New size was
370 * committed together with "save" link
371 */
Fabian Frederick53872ed2014-08-08 14:21:10 -0700372 reiserfs_info(s, "Truncating %k to %lld ..",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700373 INODE_PKEY(inode), inode->i_size);
Jeff Mahoney098297b2014-04-23 10:00:36 -0400374
375 /* don't update modification time */
376 reiserfs_truncate_file(inode, 0);
377
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700378 retval = remove_save_link(inode, truncate);
379 } else {
380 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
381 /* not completed unlink (rmdir) found */
382 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700383 if (memcmp(&last_inode_key, INODE_PKEY(inode),
384 sizeof(last_inode_key))){
385 last_inode_key = *INODE_PKEY(inode);
386 /* removal gets completed in iput */
387 retval = 0;
388 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400389 reiserfs_warning(s, "super-2189", "Dead loop "
390 "in finish_unfinished "
391 "detected, just remove "
392 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700393 retval = remove_save_link_only(s,
394 &save_link_key, 0);
395 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700396 }
397
398 iput(inode);
399 printk("done\n");
400 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700402 REISERFS_SB(s)->s_is_unlinked_ok = 0;
403
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700405 /* Turn quotas off */
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400406 reiserfs_write_unlock(s);
Jan Karaaca60612014-09-10 20:57:45 +0200407 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200408 if (sb_dqopt(s)->files[i] && quota_enabled[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400409 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700410 }
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400411 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700412 if (ms_active_set)
413 /* Restore the flag back */
Linus Torvalds1751e8a2017-11-27 13:05:09 -0800414 s->s_flags &= ~SB_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700416 pathrelse(&path);
417 if (done)
418 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
419 "Completed\n", done);
420 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700422
Jeff Mahoney098297b2014-04-23 10:00:36 -0400423/*
424 * to protect file being unlinked from getting lost we "safe" link files
425 * being unlinked. This link will be deleted in the same transaction with last
426 * item of file. mounting the filesystem we scan all these links and remove
427 * files which almost got lost
428 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700429void add_save_link(struct reiserfs_transaction_handle *th,
430 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700432 INITIALIZE_PATH(path);
433 int retval;
434 struct cpu_key key;
435 struct item_head ih;
436 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700438 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700440 /* file can only get one "save link" of each kind */
441 RFALSE(truncate &&
442 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
443 "saved link already exists for truncated inode %lx",
444 (long)inode->i_ino);
445 RFALSE(!truncate &&
446 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
447 "saved link already exists for unlinked inode %lx",
448 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700450 /* setup key of "save" link */
451 key.version = KEY_FORMAT_3_5;
452 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
453 key.on_disk_key.k_objectid = inode->i_ino;
454 if (!truncate) {
455 /* unlink, rmdir, rename */
456 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
457 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700459 /* item head of "safe" link */
460 make_le_item_head(&ih, &key, key.version,
461 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
462 4 /*length */ , 0xffff /*free space */ );
463 } else {
464 /* truncate */
465 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400466 reiserfs_warning(inode->i_sb, "green-2102",
467 "Adding a truncate savelink for "
468 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700469 INODE_PKEY(inode));
470 set_cpu_key_k_offset(&key, 1);
471 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700473 /* item head of "safe" link */
474 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
475 4 /*length */ , 0 /*free space */ );
476 }
477 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700479 /* look for its place in the tree */
480 retval = search_item(inode->i_sb, &key, &path);
481 if (retval != ITEM_NOT_FOUND) {
482 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400483 reiserfs_error(inode->i_sb, "vs-2100",
484 "search_by_key (%K) returned %d", &key,
485 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700486 pathrelse(&path);
487 return;
488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700490 /* body of "save" link */
491 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300493 /* put "save" link into tree, don't charge quota to anyone */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700494 retval =
495 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
496 if (retval) {
497 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400498 reiserfs_error(inode->i_sb, "vs-2120",
499 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700500 } else {
501 if (truncate)
502 REISERFS_I(inode)->i_flags |=
503 i_link_saved_truncate_mask;
504 else
505 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
506 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507}
508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700510int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700512 struct reiserfs_transaction_handle th;
513 struct reiserfs_key key;
514 int err;
515
516 /* we are going to do one balancing only */
517 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
518 if (err)
519 return err;
520
521 /* setup key of "save" link */
522 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
523 key.k_objectid = INODE_PKEY(inode)->k_objectid;
524 if (!truncate) {
525 /* unlink, rmdir, rename */
526 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
527 1 + inode->i_sb->s_blocksize);
528 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
529 } else {
530 /* truncate */
531 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
532 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
533 }
534
535 if ((truncate &&
536 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
537 (!truncate &&
538 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
539 /* don't take quota bytes from anywhere */
540 reiserfs_delete_solid_item(&th, NULL, &key);
541 if (!truncate) {
542 reiserfs_release_objectid(&th, inode->i_ino);
543 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
544 } else
545 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
546
Jeff Mahoney58d85422014-04-23 10:00:38 -0400547 return journal_end(&th);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548}
549
David Howellsedc666e2006-10-11 01:22:14 -0700550static void reiserfs_kill_sb(struct super_block *s)
551{
552 if (REISERFS_SB(s)) {
Al Viro672fe152013-08-05 17:37:37 +0400553 reiserfs_proc_info_done(s);
Jeff Mahoneya9e36da2011-12-21 21:18:43 +0100554 /*
555 * Force any pending inode evictions to occur now. Any
556 * inodes to be removed that have extended attributes
557 * associated with them need to clean them up before
558 * we can release the extended attribute root dentries.
559 * shrink_dcache_for_umount will BUG if we don't release
560 * those before it's called so ->put_super is too late.
561 */
562 shrink_dcache_sb(s);
563
564 dput(REISERFS_SB(s)->xattr_root);
565 REISERFS_SB(s)->xattr_root = NULL;
566 dput(REISERFS_SB(s)->priv_root);
567 REISERFS_SB(s)->priv_root = NULL;
David Howellsedc666e2006-10-11 01:22:14 -0700568 }
569
570 kill_block_super(s);
571}
572
Jan Kara33eb9282017-04-06 16:34:53 +0200573#ifdef CONFIG_QUOTA
574static int reiserfs_quota_off(struct super_block *sb, int type);
575
576static void reiserfs_quota_off_umount(struct super_block *s)
577{
578 int type;
579
580 for (type = 0; type < REISERFS_MAXQUOTAS; type++)
581 reiserfs_quota_off(s, type);
582}
583#else
584static inline void reiserfs_quota_off_umount(struct super_block *s)
585{
586}
587#endif
588
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700589static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700591 struct reiserfs_transaction_handle th;
592 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
Jan Kara33eb9282017-04-06 16:34:53 +0200594 reiserfs_quota_off_umount(s);
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400595
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200596 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200597
Jeff Mahoney098297b2014-04-23 10:00:36 -0400598 /*
599 * change file system state to current state if it was mounted
600 * with read-write permissions
601 */
David Howellsbc98a422017-07-17 08:45:34 +0100602 if (!sb_rdonly(s)) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700603 if (!journal_begin(&th, s, 10)) {
604 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
605 1);
606 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
607 REISERFS_SB(s)->s_mount_state);
Jeff Mahoney09f1b802014-04-23 10:00:39 -0400608 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700609 }
610 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611
Jeff Mahoney098297b2014-04-23 10:00:36 -0400612 /*
613 * note, journal_release checks for readonly mount, and can
614 * decide not to do a journal_end
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700615 */
616 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
Jeff Mahoney50652272006-09-30 23:28:44 -0700618 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700620 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700622 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700624 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400625 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700626 REISERFS_SB(s)->reserved_blocks);
627 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200629 reiserfs_write_unlock(s);
630 mutex_destroy(&REISERFS_SB(s)->lock);
Jeff Mahoney797d9012014-04-23 10:00:34 -0400631 destroy_workqueue(REISERFS_SB(s)->commit_wq);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700632 kfree(s->s_fs_info);
633 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634}
635
Christoph Lametere18b8902006-12-06 20:33:20 -0800636static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
638static struct inode *reiserfs_alloc_inode(struct super_block *sb)
639{
640 struct reiserfs_inode_info *ei;
Firo Yang89bfae42015-06-25 15:03:48 -0700641 ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 if (!ei)
643 return NULL;
Al Viro0e4f6a72010-07-04 12:18:57 +0400644 atomic_set(&ei->openers, 0);
645 mutex_init(&ei->tailpack);
Jan Kara53873632014-09-29 15:08:19 +0200646#ifdef CONFIG_QUOTA
647 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
648#endif
649
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 return &ei->vfs_inode;
651}
652
Al Viroa5a8cbe2019-04-15 22:20:09 -0400653static void reiserfs_free_inode(struct inode *inode)
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100654{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100655 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
656}
657
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700658static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700660 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
Christoph Lametera35afb82007-05-16 22:10:57 -0700662 INIT_LIST_HEAD(&ei->i_prealloc_list);
663 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700665
Fabian Frederick31e14362014-04-03 14:50:37 -0700666static int __init init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667{
668 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700669 sizeof(struct
670 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800671 0, (SLAB_RECLAIM_ACCOUNT|
Vladimir Davydov5d097052016-01-14 15:18:21 -0800672 SLAB_MEM_SPREAD|
673 SLAB_ACCOUNT),
Paul Mundt20c2df82007-07-20 10:11:58 +0900674 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 if (reiserfs_inode_cachep == NULL)
676 return -ENOMEM;
677 return 0;
678}
679
680static void destroy_inodecache(void)
681{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000682 /*
683 * Make sure all delayed rcu free inodes are flushed before we
684 * destroy cache.
685 */
686 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700687 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688}
689
690/* we don't mark inodes dirty, we just log them */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400691static void reiserfs_dirty_inode(struct inode *inode, int flags)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700692{
693 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700695 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200696
David Howellsbc98a422017-07-17 08:45:34 +0100697 if (sb_rdonly(inode->i_sb)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400698 reiserfs_warning(inode->i_sb, "clm-6006",
699 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700700 inode->i_ino);
701 return;
702 }
Jeff Mahoney278f6672013-08-08 17:34:46 -0400703 reiserfs_write_lock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Jeff Mahoney098297b2014-04-23 10:00:36 -0400705 /*
706 * this is really only used for atime updates, so they don't have
707 * to be included in O_SYNC or fsync
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700708 */
709 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200710 if (err)
711 goto out;
712
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700713 reiserfs_update_sd(&th, inode);
Jeff Mahoney58d85422014-04-23 10:00:38 -0400714 journal_end(&th);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200715
716out:
Jeff Mahoney278f6672013-08-08 17:34:46 -0400717 reiserfs_write_unlock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718}
719
Jan Karac3aa0772011-12-21 20:17:10 +0100720static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
721{
722 struct super_block *s = root->d_sb;
723 struct reiserfs_journal *journal = SB_JOURNAL(s);
724 long opts = REISERFS_SB(s)->s_mount_opt;
725
726 if (opts & (1 << REISERFS_LARGETAIL))
727 seq_puts(seq, ",tails=on");
728 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
729 seq_puts(seq, ",notail");
730 /* tails=small is default so we don't show it */
731
732 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
733 seq_puts(seq, ",barrier=none");
734 /* barrier=flush is default so we don't show it */
735
736 if (opts & (1 << REISERFS_ERROR_CONTINUE))
737 seq_puts(seq, ",errors=continue");
738 else if (opts & (1 << REISERFS_ERROR_PANIC))
739 seq_puts(seq, ",errors=panic");
740 /* errors=ro is default so we don't show it */
741
742 if (opts & (1 << REISERFS_DATA_LOG))
743 seq_puts(seq, ",data=journal");
744 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
745 seq_puts(seq, ",data=writeback");
746 /* data=ordered is default so we don't show it */
747
748 if (opts & (1 << REISERFS_ATTRS))
749 seq_puts(seq, ",attrs");
750
751 if (opts & (1 << REISERFS_XATTRS_USER))
752 seq_puts(seq, ",user_xattr");
753
754 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
755 seq_puts(seq, ",expose_privroot");
756
757 if (opts & (1 << REISERFS_POSIXACL))
758 seq_puts(seq, ",acl");
759
760 if (REISERFS_SB(s)->s_jdev)
Kees Cooka068acf2015-09-04 15:44:57 -0700761 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev);
Jan Karac3aa0772011-12-21 20:17:10 +0100762
763 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
764 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
765
766#ifdef CONFIG_QUOTA
767 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
Kees Cooka068acf2015-09-04 15:44:57 -0700768 seq_show_option(seq, "usrjquota",
769 REISERFS_SB(s)->s_qf_names[USRQUOTA]);
Jan Karac3aa0772011-12-21 20:17:10 +0100770 else if (opts & (1 << REISERFS_USRQUOTA))
771 seq_puts(seq, ",usrquota");
772 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
Kees Cooka068acf2015-09-04 15:44:57 -0700773 seq_show_option(seq, "grpjquota",
774 REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
Jan Karac3aa0772011-12-21 20:17:10 +0100775 else if (opts & (1 << REISERFS_GRPQUOTA))
776 seq_puts(seq, ",grpquota");
777 if (REISERFS_SB(s)->s_jquota_fmt) {
778 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
779 seq_puts(seq, ",jqfmt=vfsold");
780 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
781 seq_puts(seq, ",jqfmt=vfsv0");
782 }
783#endif
784
785 /* Block allocator options */
786 if (opts & (1 << REISERFS_NO_BORDER))
787 seq_puts(seq, ",block-allocator=noborder");
788 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
789 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
790 if (opts & (1 << REISERFS_HASHED_RELOCATION))
791 seq_puts(seq, ",block-allocator=hashed_relocation");
792 if (opts & (1 << REISERFS_TEST4))
793 seq_puts(seq, ",block-allocator=test4");
794 show_alloc_options(seq, s);
795 return 0;
796}
797
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700799static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
800 size_t, loff_t);
801static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
802 loff_t);
Jan Kara53873632014-09-29 15:08:19 +0200803
804static struct dquot **reiserfs_get_dquots(struct inode *inode)
805{
806 return REISERFS_I(inode)->i_dquot;
807}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808#endif
809
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800810static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700811 .alloc_inode = reiserfs_alloc_inode,
Al Viroa5a8cbe2019-04-15 22:20:09 -0400812 .free_inode = reiserfs_free_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700813 .write_inode = reiserfs_write_inode,
814 .dirty_inode = reiserfs_dirty_inode,
Al Viro845a2cc2010-06-07 11:37:37 -0400815 .evict_inode = reiserfs_evict_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700816 .put_super = reiserfs_put_super,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700817 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800818 .freeze_fs = reiserfs_freeze,
819 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700820 .statfs = reiserfs_statfs,
821 .remount_fs = reiserfs_remount,
Jan Karac3aa0772011-12-21 20:17:10 +0100822 .show_options = reiserfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700824 .quota_read = reiserfs_quota_read,
825 .quota_write = reiserfs_quota_write,
Jan Kara53873632014-09-29 15:08:19 +0200826 .get_dquots = reiserfs_get_dquots,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827#endif
828};
829
830#ifdef CONFIG_QUOTA
831#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
832
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833static int reiserfs_write_dquot(struct dquot *);
834static int reiserfs_acquire_dquot(struct dquot *);
835static int reiserfs_release_dquot(struct dquot *);
836static int reiserfs_mark_dquot_dirty(struct dquot *);
837static int reiserfs_write_info(struct super_block *, int);
Al Viro8c54ca92016-11-20 19:49:34 -0500838static int reiserfs_quota_on(struct super_block *, int, int, const struct path *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700840static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700841 .write_dquot = reiserfs_write_dquot,
842 .acquire_dquot = reiserfs_acquire_dquot,
843 .release_dquot = reiserfs_release_dquot,
844 .mark_dirty = reiserfs_mark_dquot_dirty,
845 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100846 .alloc_dquot = dquot_alloc,
847 .destroy_dquot = dquot_destroy,
Jan Karabe6257b2016-01-25 19:24:50 +0100848 .get_next_id = dquot_get_next_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849};
850
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700851static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700852 .quota_on = reiserfs_quota_on,
Jan Kara33eb9282017-04-06 16:34:53 +0200853 .quota_off = reiserfs_quota_off,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400854 .quota_sync = dquot_quota_sync,
Jan Kara0a2403392014-11-19 00:42:09 +0100855 .get_state = dquot_get_state,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400856 .set_info = dquot_set_dqinfo,
857 .get_dqblk = dquot_get_dqblk,
858 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859};
860#endif
861
Christoph Hellwig39655162007-10-21 16:42:17 -0700862static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700863 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700864 .fh_to_dentry = reiserfs_fh_to_dentry,
865 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700866 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700867};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Jeff Mahoney098297b2014-04-23 10:00:36 -0400869/*
870 * this struct is used in reiserfs_getopt () for containing the value for
871 * those mount options that have values rather than being toggles.
872 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700874 char *value;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400875 /*
876 * bitmask which is to set on mount_options bitmask
877 * when this value is found, 0 is no bits are to be changed.
878 */
879 int setmask;
880 /*
881 * bitmask which is to clear on mount_options bitmask
882 * when this value is found, 0 is no bits are to be changed.
883 * This is applied BEFORE setmask
884 */
885 int clrmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886} arg_desc_t;
887
888/* Set this bit in arg_required to allow empty arguments */
889#define REISERFS_OPT_ALLOWEMPTY 31
890
Jeff Mahoney098297b2014-04-23 10:00:36 -0400891/*
892 * this struct is used in reiserfs_getopt() for describing the
893 * set of reiserfs mount options
894 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700896 char *option_name;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400897
898 /* 0 if argument is not required, not 0 otherwise */
899 int arg_required;
900
901 /* list of values accepted by an option */
902 const arg_desc_t *values;
903
904 /*
905 * bitmask which is to set on mount_options bitmask
906 * when this value is found, 0 is no bits are to be changed.
907 */
908 int setmask;
909
910 /*
911 * bitmask which is to clear on mount_options bitmask
912 * when this value is found, 0 is no bits are to be changed.
913 * This is applied BEFORE setmask
914 */
915 int clrmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916} opt_desc_t;
917
918/* possible values for -o data= */
919static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700920 {"ordered", 1 << REISERFS_DATA_ORDERED,
921 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
922 {"journal", 1 << REISERFS_DATA_LOG,
923 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
924 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
925 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800926 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927};
928
929/* possible values for -o barrier= */
930static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700931 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
932 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800933 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934};
935
Jeff Mahoney098297b2014-04-23 10:00:36 -0400936/*
937 * possible values for "-o block-allocator=" and bits which are to be set in
938 * s_mount_opt of reiserfs specific part of in-core super block
939 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700941 {"noborder", 1 << REISERFS_NO_BORDER, 0},
942 {"border", 0, 1 << REISERFS_NO_BORDER},
943 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
944 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
945 {"test4", 1 << REISERFS_TEST4, 0},
946 {"notest4", 0, 1 << REISERFS_TEST4},
947 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948};
949
950static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700951 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
952 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
953 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
954 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955};
956
957static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700958 {"panic", 1 << REISERFS_ERROR_PANIC,
959 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
960 {"ro-remount", 1 << REISERFS_ERROR_RO,
961 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700963 {"continue", 1 << REISERFS_ERROR_CONTINUE,
964 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700966 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967};
968
Jeff Mahoney098297b2014-04-23 10:00:36 -0400969/*
970 * proceed only one option from a list *cur - string containing of mount
971 * options
972 * opts - array of options which are accepted
973 * opt_arg - if option is found and requires an argument and if it is specifed
974 * in the input - pointer to the argument is stored here
975 * bit_flags - if option requires to set a certain bit - it is set here
976 * return -1 if unknown option is found, opt->arg_required otherwise
977 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700978static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
979 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700981 char *p;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400982 /*
983 * foo=bar,
984 * ^ ^ ^
985 * | | +-- option_end
986 * | +-- arg_start
987 * +-- option_start
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700988 */
989 const opt_desc_t *opt;
990 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700992 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700994 /* assume argument cannot contain commas */
995 *cur = strchr(p, ',');
996 if (*cur) {
997 *(*cur) = '\0';
998 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001001 if (!strncmp(p, "alloc=", 6)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001002 /*
1003 * Ugly special case, probably we should redo options
1004 * parser so that it can understand several arguments for
1005 * some options, also so that it can fill several bitfields
1006 * with option values.
1007 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001008 if (reiserfs_parse_alloc_options(s, p + 6)) {
1009 return -1;
1010 } else {
1011 return 0;
1012 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001014
1015 /* for every option in the list */
1016 for (opt = opts; opt->option_name; opt++) {
1017 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
1018 if (bit_flags) {
1019 if (opt->clrmask ==
1020 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001021 reiserfs_warning(s, "super-6500",
1022 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001023 p);
1024 else
1025 *bit_flags &= ~opt->clrmask;
1026 if (opt->setmask ==
1027 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001028 reiserfs_warning(s, "super-6501",
1029 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001030 p);
1031 else
1032 *bit_flags |= opt->setmask;
1033 }
1034 break;
1035 }
1036 }
1037 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001038 reiserfs_warning(s, "super-6502",
1039 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001040 return -1;
1041 }
1042
1043 p += strlen(opt->option_name);
1044 switch (*p) {
1045 case '=':
1046 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001047 reiserfs_warning(s, "super-6503",
1048 "the option \"%s\" does not "
1049 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001050 opt->option_name);
1051 return -1;
1052 }
1053 break;
1054
1055 case 0:
1056 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001057 reiserfs_warning(s, "super-6504",
1058 "the option \"%s\" requires an "
1059 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001060 return -1;
1061 }
1062 break;
1063 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001064 reiserfs_warning(s, "super-6505",
1065 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001066 opt->option_name);
1067 return -1;
1068 }
1069
Jeff Mahoney098297b2014-04-23 10:00:36 -04001070 /*
1071 * move to the argument, or to next option if argument is not
1072 * required
1073 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001074 p++;
1075
1076 if (opt->arg_required
1077 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1078 && !strlen(p)) {
1079 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001080 reiserfs_warning(s, "super-6506",
1081 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001082 opt->option_name);
1083 return -1;
1084 }
1085
1086 if (!opt->values) {
1087 /* *=NULLopt_arg contains pointer to argument */
1088 *opt_arg = p;
1089 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1090 }
1091
1092 /* values possible for this option are listed in opt->values */
1093 for (arg = opt->values; arg->value; arg++) {
1094 if (!strcmp(p, arg->value)) {
1095 if (bit_flags) {
1096 *bit_flags &= ~arg->clrmask;
1097 *bit_flags |= arg->setmask;
1098 }
1099 return opt->arg_required;
1100 }
1101 }
1102
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001103 reiserfs_warning(s, "super-6506",
1104 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001105 opt->option_name);
1106 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107}
1108
1109/* returns 0 if something is wrong in option string, 1 - otherwise */
Jeff Mahoney098297b2014-04-23 10:00:36 -04001110static int reiserfs_parse_options(struct super_block *s,
1111
1112 /* string given via mount's -o */
1113 char *options,
1114
1115 /*
1116 * after the parsing phase, contains the
1117 * collection of bitflags defining what
1118 * mount options were selected.
1119 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001120 unsigned long *mount_options,
Jeff Mahoney098297b2014-04-23 10:00:36 -04001121
1122 /* strtol-ed from NNN of resize=NNN */
1123 unsigned long *blocks,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001124 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001125 unsigned int *commit_max_age,
1126 char **qf_names,
1127 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001129 int c;
1130 char *arg = NULL;
1131 char *pos;
1132 opt_desc_t opts[] = {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001133 /*
1134 * Compatibility stuff, so that -o notail for old
1135 * setups still work
1136 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001137 {"tails",.arg_required = 't',.values = tails},
1138 {"notail",.clrmask =
1139 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1140 {"conv",.setmask = 1 << REISERFS_CONVERT},
1141 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1142 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -04001143 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001145 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1146 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001148 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1149 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150#endif
1151#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001152 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1153 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001155 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1156 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001158 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001159 {"replayonly",.setmask = 1 << REPLAYONLY},
1160 {"block-allocator",.arg_required = 'a',.values = balloc},
1161 {"data",.arg_required = 'd',.values = logging_mode},
1162 {"barrier",.arg_required = 'b',.values = barrier_mode},
1163 {"resize",.arg_required = 'r',.values = NULL},
1164 {"jdev",.arg_required = 'j',.values = NULL},
1165 {"nolargeio",.arg_required = 'w',.values = NULL},
1166 {"commit",.arg_required = 'c',.values = NULL},
Jan Karac3aa0772011-12-21 20:17:10 +01001167 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1168 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1169 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001170 {"errors",.arg_required = 'e',.values = error_actions},
1171 {"usrjquota",.arg_required =
1172 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1173 {"grpjquota",.arg_required =
1174 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1175 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001176 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001177 };
1178
1179 *blocks = 0;
1180 if (!options || !*options)
Jeff Mahoney098297b2014-04-23 10:00:36 -04001181 /*
1182 * use default configuration: create tails, journaling on, no
1183 * conversion to newest format
1184 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001185 return 1;
1186
1187 for (pos = options; pos;) {
1188 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1189 if (c == -1)
1190 /* wrong option is given */
1191 return 0;
1192
1193 if (c == 'r') {
1194 char *p;
1195
1196 p = NULL;
1197 /* "resize=NNN" or "resize=auto" */
1198
1199 if (!strcmp(arg, "auto")) {
1200 /* From JFS code, to auto-get the size. */
1201 *blocks =
Fabian Frederickb899ba72017-02-27 14:27:22 -08001202 i_size_read(s->s_bdev->bd_inode) >> s->
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001203 s_blocksize_bits;
1204 } else {
1205 *blocks = simple_strtoul(arg, &p, 0);
1206 if (*p != '\0') {
1207 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001208 reiserfs_warning(s, "super-6507",
1209 "bad value %s for "
1210 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001211 return 0;
1212 }
1213 }
1214 }
1215
1216 if (c == 'c') {
1217 char *p = NULL;
1218 unsigned long val = simple_strtoul(arg, &p, 0);
1219 /* commit=NNN (time in seconds) */
1220 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001221 reiserfs_warning(s, "super-6508",
1222 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001223 arg);
1224 return 0;
1225 }
1226 *commit_max_age = (unsigned int)val;
1227 }
1228
1229 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001230 reiserfs_warning(s, "super-6509", "nolargeio option "
1231 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -07001232 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001233 }
1234
1235 if (c == 'j') {
1236 if (arg && *arg && jdev_name) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001237 /* Hm, already assigned? */
1238 if (*jdev_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001239 reiserfs_warning(s, "super-6510",
1240 "journal device was "
1241 "already specified to "
1242 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001243 return 0;
1244 }
1245 *jdev_name = arg;
1246 }
1247 }
1248#ifdef CONFIG_QUOTA
1249 if (c == 'u' || c == 'g') {
1250 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1251
Jan Kara6929f892008-08-20 18:16:36 +02001252 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001253 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001254 reiserfs_warning(s, "super-6511",
1255 "cannot change journaled "
1256 "quota options when quota "
1257 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001258 return 0;
1259 }
1260 if (*arg) { /* Some filename specified? */
1261 if (REISERFS_SB(s)->s_qf_names[qtype]
1262 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1263 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001264 reiserfs_warning(s, "super-6512",
1265 "%s quota file "
1266 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001267 QTYPE2NAME(qtype));
1268 return 0;
1269 }
1270 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001271 reiserfs_warning(s, "super-6513",
1272 "quotafile must be "
1273 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001274 return 0;
1275 }
Ionut-Gabriel Raduaf591ad2013-03-10 15:06:23 +02001276 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001277 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001278 reiserfs_warning(s, "reiserfs-2502",
1279 "not enough memory "
1280 "for storing "
1281 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001282 return 0;
1283 }
Jan Karac3aa0772011-12-21 20:17:10 +01001284 if (qtype == USRQUOTA)
1285 *mount_options |= 1 << REISERFS_USRQUOTA;
1286 else
1287 *mount_options |= 1 << REISERFS_GRPQUOTA;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001288 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001289 if (qf_names[qtype] !=
1290 REISERFS_SB(s)->s_qf_names[qtype])
1291 kfree(qf_names[qtype]);
1292 qf_names[qtype] = NULL;
Jan Karac3aa0772011-12-21 20:17:10 +01001293 if (qtype == USRQUOTA)
1294 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1295 else
1296 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001297 }
1298 }
1299 if (c == 'f') {
1300 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001301 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001302 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001303 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001304 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001305 reiserfs_warning(s, "super-6514",
1306 "unknown quota format "
1307 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001308 return 0;
1309 }
Jan Kara6929f892008-08-20 18:16:36 +02001310 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001311 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001312 reiserfs_warning(s, "super-6515",
1313 "cannot change journaled "
1314 "quota options when quota "
1315 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001316 return 0;
1317 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001318 }
1319#else
1320 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001321 reiserfs_warning(s, "reiserfs-2503", "journaled "
1322 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001323 return 0;
1324 }
1325#endif
1326 }
1327
1328#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001329 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1330 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001331 reiserfs_warning(s, "super-6515",
1332 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001333 return 0;
1334 }
Jan Karac3aa0772011-12-21 20:17:10 +01001335 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1336 sb_has_quota_loaded(s, USRQUOTA)) ||
1337 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1338 sb_has_quota_loaded(s, GRPQUOTA))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001339 reiserfs_warning(s, "super-6516", "quota options must "
1340 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001341 return 0;
1342 }
1343#endif
1344
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346}
1347
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001348static void switch_data_mode(struct super_block *s, unsigned long mode)
1349{
1350 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1351 (1 << REISERFS_DATA_ORDERED) |
1352 (1 << REISERFS_DATA_WRITEBACK));
1353 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354}
1355
1356static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1357{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001358 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1359 if (!reiserfs_data_log(s)) {
1360 switch_data_mode(s, REISERFS_DATA_LOG);
1361 reiserfs_info(s, "switching to journaled data mode\n");
1362 }
1363 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1364 if (!reiserfs_data_ordered(s)) {
1365 switch_data_mode(s, REISERFS_DATA_ORDERED);
1366 reiserfs_info(s, "switching to ordered data mode\n");
1367 }
1368 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1369 if (!reiserfs_data_writeback(s)) {
1370 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1371 reiserfs_info(s, "switching to writeback data mode\n");
1372 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374}
1375
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001376static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001378 int flush = (1 << REISERFS_BARRIER_FLUSH);
1379 int none = (1 << REISERFS_BARRIER_NONE);
1380 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001382 if (bits & all_barrier) {
1383 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1384 if (bits & flush) {
1385 REISERFS_SB(s)->s_mount_opt |= flush;
1386 printk("reiserfs: enabling write barrier flush mode\n");
1387 } else if (bits & none) {
1388 REISERFS_SB(s)->s_mount_opt |= none;
1389 printk("reiserfs: write barriers turned off\n");
1390 }
1391 }
1392}
1393
1394static void handle_attrs(struct super_block *s)
1395{
1396 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1397
1398 if (reiserfs_attrs(s)) {
1399 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001400 reiserfs_warning(s, "super-6517", "cannot support "
1401 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001402 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 return;
1404 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001405 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001406 reiserfs_warning(s, "super-6518", "cannot support "
1407 "attributes until flag is set in "
1408 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001409 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 }
1411 }
1412}
1413
Jan Kara00b44192008-07-25 01:46:38 -07001414#ifdef CONFIG_QUOTA
1415static void handle_quota_files(struct super_block *s, char **qf_names,
1416 unsigned int *qfmt)
1417{
1418 int i;
1419
Jan Karaaca60612014-09-10 20:57:45 +02001420 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
Jan Kara00b44192008-07-25 01:46:38 -07001421 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1422 kfree(REISERFS_SB(s)->s_qf_names[i]);
1423 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1424 }
Jan Karaa06d7892011-12-21 17:35:34 +01001425 if (*qfmt)
1426 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
Jan Kara00b44192008-07-25 01:46:38 -07001427}
1428#endif
1429
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001430static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001432 struct reiserfs_super_block *rs;
1433 struct reiserfs_transaction_handle th;
1434 unsigned long blocks;
1435 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1436 unsigned long safe_mask = 0;
1437 unsigned int commit_max_age = (unsigned int)-1;
1438 struct reiserfs_journal *journal = SB_JOURNAL(s);
Mikulas Patockab9d89052016-05-24 22:51:27 +02001439 char *new_opts;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001440 int err;
Jan Karaaca60612014-09-10 20:57:45 +02001441 char *qf_names[REISERFS_MAXQUOTAS];
Jan Kara00b44192008-07-25 01:46:38 -07001442 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001444 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001445#endif
Jan Kara00b44192008-07-25 01:46:38 -07001446
Mikulas Patockab9d89052016-05-24 22:51:27 +02001447 new_opts = kstrdup(arg, GFP_KERNEL);
1448 if (arg && !new_opts)
1449 return -ENOMEM;
1450
Theodore Ts'o02b99842014-03-13 10:14:33 -04001451 sync_filesystem(s);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001452 reiserfs_write_lock(s);
1453
1454#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001455 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456#endif
1457
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001458 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001460 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001461 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1462 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463#ifdef CONFIG_QUOTA
Jan Karaaca60612014-09-10 20:57:45 +02001464 for (i = 0; i < REISERFS_MAXQUOTAS; i++)
Jan Kara00b44192008-07-25 01:46:38 -07001465 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1466 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001467#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001468 err = -EINVAL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04001469 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 }
Jan Kara00b44192008-07-25 01:46:38 -07001471#ifdef CONFIG_QUOTA
1472 handle_quota_files(s, qf_names, &qfmt);
1473#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001475 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001477 /* Add options that are safe here */
1478 safe_mask |= 1 << REISERFS_SMALLTAIL;
1479 safe_mask |= 1 << REISERFS_LARGETAIL;
1480 safe_mask |= 1 << REISERFS_NO_BORDER;
1481 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1482 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1483 safe_mask |= 1 << REISERFS_TEST4;
1484 safe_mask |= 1 << REISERFS_ATTRS;
1485 safe_mask |= 1 << REISERFS_XATTRS_USER;
1486 safe_mask |= 1 << REISERFS_POSIXACL;
1487 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1488 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1489 safe_mask |= 1 << REISERFS_ERROR_RO;
1490 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1491 safe_mask |= 1 << REISERFS_ERROR_PANIC;
Jan Karac3aa0772011-12-21 20:17:10 +01001492 safe_mask |= 1 << REISERFS_USRQUOTA;
1493 safe_mask |= 1 << REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494
Jeff Mahoney098297b2014-04-23 10:00:36 -04001495 /*
1496 * Update the bitmask, taking care to keep
1497 * the bits we're not allowed to change here
1498 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001499 REISERFS_SB(s)->s_mount_opt =
1500 (REISERFS_SB(s)->
1501 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001503 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1504 journal->j_max_commit_age = commit_max_age;
1505 journal->j_max_trans_age = commit_max_age;
1506 } else if (commit_max_age == 0) {
1507 /* 0 means restore defaults. */
1508 journal->j_max_commit_age = journal->j_default_max_commit_age;
1509 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1510 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001512 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001513 err = reiserfs_resize(s, blocks);
1514 if (err != 0)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001515 goto out_err_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001516 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517
Linus Torvalds1751e8a2017-11-27 13:05:09 -08001518 if (*mount_flags & SB_RDONLY) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001519 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001520 reiserfs_xattr_init(s, *mount_flags);
1521 /* remount read-only */
David Howellsbc98a422017-07-17 08:45:34 +01001522 if (sb_rdonly(s))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001523 /* it is read-only already */
Jeff Mahoney4c051412013-08-08 17:27:19 -04001524 goto out_ok_unlocked;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001525
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001526 err = dquot_suspend(s, -1);
1527 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001528 goto out_err;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001529
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001530 /* try to remount file system with read-only permissions */
1531 if (sb_umount_state(rs) == REISERFS_VALID_FS
1532 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001533 goto out_ok_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001534 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Jeff Mahoney4c051412013-08-08 17:27:19 -04001536 reiserfs_write_lock(s);
1537
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001538 err = journal_begin(&th, s, 10);
1539 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001540 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001542 /* Mounting a rw partition read-only. */
1543 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1544 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
Jeff Mahoney09f1b802014-04-23 10:00:39 -04001545 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001546 } else {
1547 /* remount read-write */
David Howellsbc98a422017-07-17 08:45:34 +01001548 if (!sb_rdonly(s)) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001549 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001550 reiserfs_xattr_init(s, *mount_flags);
Jeff Mahoney4c051412013-08-08 17:27:19 -04001551 goto out_ok_unlocked; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001552 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001554 if (reiserfs_is_journal_aborted(journal)) {
1555 err = journal->j_errno;
Jeff Mahoney4c051412013-08-08 17:27:19 -04001556 goto out_err_unlock;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001557 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001559 handle_data_mode(s, mount_options);
1560 handle_barrier_mode(s, mount_options);
1561 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001562
1563 /* now it is safe to call journal_begin */
Linus Torvalds1751e8a2017-11-27 13:05:09 -08001564 s->s_flags &= ~SB_RDONLY;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001565 err = journal_begin(&th, s, 10);
1566 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001567 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001569 /* Mount a partition which is read-only, read-write */
1570 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1571 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
Linus Torvalds1751e8a2017-11-27 13:05:09 -08001572 s->s_flags &= ~SB_RDONLY;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001573 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001574 if (!old_format_only(s))
1575 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001576 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
Jeff Mahoney09f1b802014-04-23 10:00:39 -04001577 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001578 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1579 }
1580 /* this will force a full flush of all journal lists */
1581 SB_JOURNAL(s)->j_must_wait = 1;
Jeff Mahoney58d85422014-04-23 10:00:38 -04001582 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001583 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001584 goto out_err_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001585
Jeff Mahoney4c051412013-08-08 17:27:19 -04001586 reiserfs_write_unlock(s);
Linus Torvalds1751e8a2017-11-27 13:05:09 -08001587 if (!(*mount_flags & SB_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001588 dquot_resume(s, -1);
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001589 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001590 finish_unfinished(s);
Jeff Mahoney4c051412013-08-08 17:27:19 -04001591 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001592 reiserfs_xattr_init(s, *mount_flags);
1593 }
1594
Jeff Mahoney4c051412013-08-08 17:27:19 -04001595out_ok_unlocked:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001596 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001597
Jeff Mahoney4c051412013-08-08 17:27:19 -04001598out_err_unlock:
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001599 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001600out_err:
1601 kfree(new_opts);
1602 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603}
1604
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001605static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001607 struct buffer_head *bh;
1608 struct reiserfs_super_block *rs;
1609 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001611 bh = sb_bread(s, offset / s->s_blocksize);
1612 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001613 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001614 "bread failed (dev %s, block %lu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001615 s->s_id, offset / s->s_blocksize,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001616 s->s_blocksize);
1617 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001620 rs = (struct reiserfs_super_block *)bh->b_data;
1621 if (!is_any_reiserfs_magic_string(rs)) {
1622 brelse(bh);
1623 return 1;
1624 }
Jeff Mahoney098297b2014-04-23 10:00:36 -04001625 /*
1626 * ok, reiserfs signature (old or new) found in at the given offset
1627 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001628 fs_blocksize = sb_blocksize(rs);
1629 brelse(bh);
1630 sb_set_blocksize(s, fs_blocksize);
1631
1632 bh = sb_bread(s, offset / s->s_blocksize);
1633 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001634 reiserfs_warning(s, "sh-2007",
1635 "bread failed (dev %s, block %lu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001636 s->s_id, offset / s->s_blocksize,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001637 s->s_blocksize);
1638 return 1;
1639 }
1640
1641 rs = (struct reiserfs_super_block *)bh->b_data;
1642 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001643 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
Fabian Frederick53872ed2014-08-08 14:21:10 -07001644 "filesystem on (dev %s, block %llu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001645 s->s_id,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001646 (unsigned long long)bh->b_blocknr,
1647 s->s_blocksize);
1648 brelse(bh);
1649 return 1;
1650 }
1651
1652 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1653 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001654 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1655 "--rebuild-tree run detected. Please run\n"
1656 "reiserfsck --rebuild-tree and wait for a "
1657 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001658 "get newer reiserfsprogs package");
1659 return 1;
1660 }
1661
1662 SB_BUFFER_WITH_SB(s) = bh;
1663 SB_DISK_SUPER_BLOCK(s) = rs;
1664
Jeff Mahoney098297b2014-04-23 10:00:36 -04001665 /*
1666 * magic is of non-standard journal filesystem, look at s_version to
1667 * find which format is in use
1668 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001669 if (is_reiserfs_jr(rs)) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001670 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001671 reiserfs_info(s, "found reiserfs format \"3.6\""
1672 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001673 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001674 reiserfs_info(s, "found reiserfs format \"3.5\""
1675 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001676 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001677 reiserfs_warning(s, "sh-2012", "found unknown "
1678 "format \"%u\" of reiserfs with "
1679 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001680 return 1;
1681 }
1682 } else
Jeff Mahoney098297b2014-04-23 10:00:36 -04001683 /*
1684 * s_version of standard format may contain incorrect
1685 * information, so we just look at the magic string
1686 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001687 reiserfs_info(s,
1688 "found reiserfs format \"%s\" with standard journal\n",
1689 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1690
1691 s->s_op = &reiserfs_sops;
1692 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001694 s->s_qcop = &reiserfs_qctl_operations;
1695 s->dq_op = &reiserfs_quota_operations;
Jan Kara53873632014-09-29 15:08:19 +02001696 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697#endif
1698
Jeff Mahoney098297b2014-04-23 10:00:36 -04001699 /*
1700 * new format is limited by the 32 bit wide i_blocks field, want to
1701 * be one full block below that.
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001702 */
1703 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1704 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705}
1706
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001708static int reread_meta_blocks(struct super_block *s)
1709{
Mike Christiedfec8a12016-06-05 14:31:44 -05001710 ll_rw_block(REQ_OP_READ, 0, 1, &SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001711 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1712 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001713 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001714 return 1;
1715 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001717 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718}
1719
Jeff Mahoney098297b2014-04-23 10:00:36 -04001720/* hash detection stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721
Jeff Mahoney098297b2014-04-23 10:00:36 -04001722/*
1723 * if root directory is empty - we set default - Yura's - hash and
1724 * warn about it
1725 * FIXME: we look for only one name in a directory. If tea and yura
1726 * both have the same value - we ask user to send report to the
1727 * mailing list
1728 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001729static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001731 int retval;
1732 struct inode *inode;
1733 struct cpu_key key;
1734 INITIALIZE_PATH(path);
1735 struct reiserfs_dir_entry de;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001736 struct reiserfs_de_head *deh;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001737 __u32 hash = DEFAULT_HASH;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001738 __u32 deh_hashval, teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739
David Howells2b0143b2015-03-17 22:25:59 +00001740 inode = d_inode(s->s_root);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001742 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1743 retval = search_by_entry_key(s, &key, &path, &de);
1744 if (retval == IO_ERROR) {
1745 pathrelse(&path);
1746 return UNSET_HASH;
1747 }
1748 if (retval == NAME_NOT_FOUND)
1749 de.de_entry_num--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001751 set_de_name_and_namelen(&de);
1752 deh = de.de_deh + de.de_entry_num;
1753
1754 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1755 /* allow override in this case */
1756 if (reiserfs_rupasov_hash(s))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001757 hash = YURA_HASH;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001758 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1759 goto out;
1760 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001762 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1763 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1764 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1765 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1766
1767 if ((teahash == r5hash && deh_hashval == r5hash) ||
1768 (teahash == yurahash && deh_hashval == yurahash) ||
1769 (r5hash == yurahash && deh_hashval == yurahash)) {
1770 reiserfs_warning(s, "reiserfs-2506",
1771 "Unable to automatically detect hash "
1772 "function. Please mount with -o "
1773 "hash={tea,rupasov,r5}");
1774 hash = UNSET_HASH;
1775 goto out;
1776 }
1777
1778 if (deh_hashval == yurahash)
1779 hash = YURA_HASH;
1780 else if (deh_hashval == teahash)
1781 hash = TEA_HASH;
1782 else if (deh_hashval == r5hash)
1783 hash = R5_HASH;
1784 else {
1785 reiserfs_warning(s, "reiserfs-2506",
1786 "Unrecognised hash function");
1787 hash = UNSET_HASH;
1788 }
1789out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001790 pathrelse(&path);
1791 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792}
1793
Jeff Mahoney098297b2014-04-23 10:00:36 -04001794/* finds out which hash names are sorted with */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001795static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001797 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001799 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800
Jeff Mahoney098297b2014-04-23 10:00:36 -04001801 /*
1802 * reiserfs_hash_detect() == true if any of the hash mount options
1803 * were used. We must check them to make sure the user isn't
1804 * using a bad hash value
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001805 */
1806 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1807 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001809 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001810 /*
1811 * detection has found the hash, and we must check against the
1812 * mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001813 */
1814 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001815 reiserfs_warning(s, "reiserfs-2507",
1816 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001817 "unable to force rupasov hash",
1818 reiserfs_hashname(code));
1819 code = UNSET_HASH;
1820 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001821 reiserfs_warning(s, "reiserfs-2508",
1822 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001823 "unable to force tea hash",
1824 reiserfs_hashname(code));
1825 code = UNSET_HASH;
1826 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001827 reiserfs_warning(s, "reiserfs-2509",
1828 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001829 "unable to force r5 hash",
1830 reiserfs_hashname(code));
1831 code = UNSET_HASH;
1832 }
1833 } else {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001834 /*
1835 * find_hash_out was not called or
1836 * could not determine the hash
1837 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001838 if (reiserfs_rupasov_hash(s)) {
1839 code = YURA_HASH;
1840 } else if (reiserfs_tea_hash(s)) {
1841 code = TEA_HASH;
1842 } else if (reiserfs_r5_hash(s)) {
1843 code = R5_HASH;
1844 }
1845 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846
Jeff Mahoney098297b2014-04-23 10:00:36 -04001847 /*
1848 * if we are mounted RW, and we have a new valid hash code, update
1849 * the super
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001850 */
1851 if (code != UNSET_HASH &&
David Howellsbc98a422017-07-17 08:45:34 +01001852 !sb_rdonly(s) &&
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001853 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1854 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1855 }
1856 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857}
1858
Jeff Mahoney098297b2014-04-23 10:00:36 -04001859/* return pointer to appropriate function */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001860static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001862 switch (what_hash(s)) {
1863 case TEA_HASH:
1864 reiserfs_info(s, "Using tea hash to sort names\n");
1865 return keyed_hash;
1866 case YURA_HASH:
1867 reiserfs_info(s, "Using rupasov hash to sort names\n");
1868 return yura_hash;
1869 case R5_HASH:
1870 reiserfs_info(s, "Using r5 hash to sort names\n");
1871 return r5_hash;
1872 }
1873 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874}
1875
Jeff Mahoney098297b2014-04-23 10:00:36 -04001876/* this is used to set up correct value for old partitions */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001877static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001879 if (func == keyed_hash)
1880 return TEA_HASH;
1881 if (func == yura_hash)
1882 return YURA_HASH;
1883 if (func == r5_hash)
1884 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885
Jeff Mahoney098297b2014-04-23 10:00:36 -04001886 BUG(); /* should never happen */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001888 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889}
1890
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001891#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001893 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001895static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001897 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001898 struct reiserfs_transaction_handle th;
1899 int old_format = 0;
1900 unsigned long blocks;
1901 unsigned int commit_max_age = 0;
1902 int jinit_done = 0;
1903 struct reiserfs_iget_args args;
1904 struct reiserfs_super_block *rs;
1905 char *jdev_name;
1906 struct reiserfs_sb_info *sbi;
1907 int errval = -EINVAL;
Jan Karaaca60612014-09-10 20:57:45 +02001908 char *qf_names[REISERFS_MAXQUOTAS] = {};
Jan Kara00b44192008-07-25 01:46:38 -07001909 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910
Yan Burman01afb212006-12-06 20:39:01 -08001911 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001912 if (!sbi)
1913 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001914 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001915 /* Set default values for options: non-aggressive tails, RO on errors */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001916 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1917 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1918 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001919 /* no preallocation minimum, be smart in reiserfs_file_write instead */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001920 sbi->s_alloc_options.preallocmin = 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001921 /* Preallocate by 16 blocks (17-1) at once */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001922 sbi->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001923 /* setup default block allocator options */
1924 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925
Artem Bityutskiy033369d2012-06-01 17:18:08 +03001926 spin_lock_init(&sbi->old_work_lock);
1927 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001928 mutex_init(&sbi->lock);
1929 sbi->lock_depth = -1;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001930
Jeff Mahoney797d9012014-04-23 10:00:34 -04001931 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1932 s->s_id);
1933 if (!sbi->commit_wq) {
1934 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1935 errval = -ENOMEM;
1936 goto error_unlocked;
1937 }
1938
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001939 jdev_name = NULL;
1940 if (reiserfs_parse_options
Jeff Mahoneya228bf82014-04-23 10:00:42 -04001941 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001942 &commit_max_age, qf_names, &qfmt) == 0) {
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001943 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001944 }
Jan Karac3aa0772011-12-21 20:17:10 +01001945 if (jdev_name && jdev_name[0]) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001946 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1947 if (!sbi->s_jdev) {
Jan Karac3aa0772011-12-21 20:17:10 +01001948 SWARN(silent, s, "", "Cannot allocate memory for "
1949 "journal device name");
1950 goto error;
1951 }
1952 }
Jan Kara00b44192008-07-25 01:46:38 -07001953#ifdef CONFIG_QUOTA
1954 handle_quota_files(s, qf_names, &qfmt);
1955#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001957 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001958 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001959 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001960 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961
Jeff Mahoney098297b2014-04-23 10:00:36 -04001962 /*
1963 * try old format (undistributed bitmap, super block in 8-th 1k
1964 * block of a device)
1965 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001966 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1967 old_format = 1;
Jeff Mahoney098297b2014-04-23 10:00:36 -04001968
1969 /*
1970 * try new format (64-th 1k block), which can contain reiserfs
1971 * super block
1972 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001973 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001974 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Al Viro2ccdc412013-11-22 13:25:39 -05001975 s->s_id);
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001976 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001977 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978
Deepa Dinamani22b13962019-07-30 08:22:29 -07001979 s->s_time_min = 0;
1980 s->s_time_max = U32_MAX;
1981
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001982 rs = SB_DISK_SUPER_BLOCK(s);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001983 /*
1984 * Let's do basic sanity check to verify that underlying device is not
1985 * smaller than the filesystem. If the check fails then abort and
1986 * scream, because bad stuff will happen otherwise.
1987 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001988 if (s->s_bdev && s->s_bdev->bd_inode
1989 && i_size_read(s->s_bdev->bd_inode) <
1990 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001991 SWARN(silent, s, "", "Filesystem cannot be "
1992 "mounted because it is bigger than the device");
1993 SWARN(silent, s, "", "You may need to run fsck "
1994 "or increase size of your LVM partition");
1995 SWARN(silent, s, "", "Or may be you forgot to "
1996 "reboot after fdisk when it told you to");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001997 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001998 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002000 sbi->s_mount_state = SB_REISERFS_STATE(s);
2001 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002
Jeff Mahoney6f010462006-09-30 23:28:43 -07002003 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002004 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002005 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002006 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002007
Jeff Mahoneyd2c89a422006-11-02 22:07:20 -08002008 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002010 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
2011 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012#endif
2013
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002014 /* make data=ordered the default */
2015 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
2016 !reiserfs_data_writeback(s)) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03002017 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 }
2019
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002020 if (reiserfs_data_log(s)) {
2021 reiserfs_info(s, "using journaled data mode\n");
2022 } else if (reiserfs_data_ordered(s)) {
2023 reiserfs_info(s, "using ordered data mode\n");
2024 } else {
2025 reiserfs_info(s, "using writeback data mode\n");
2026 }
2027 if (reiserfs_barrier_flush(s)) {
2028 printk("reiserfs: using flush barriers\n");
2029 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002030
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08002031 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
2032 SWARN(silent, s, "sh-2022",
2033 "unable to initialize journal space");
2034 goto error_unlocked;
2035 } else {
Jeff Mahoney098297b2014-04-23 10:00:36 -04002036 /*
2037 * once this is set, journal_release must be called
2038 * if we error out of the mount
2039 */
2040 jinit_done = 1;
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08002041 }
2042
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002043 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002044 SWARN(silent, s, "jmacd-9",
2045 "unable to reread meta blocks after journal init");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08002046 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 }
2048
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002049 if (replay_only(s))
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08002050 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002051
David Howellsbc98a422017-07-17 08:45:34 +01002052 if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002053 SWARN(silent, s, "clm-7000",
2054 "Detected readonly device, marking FS readonly");
Linus Torvalds1751e8a2017-11-27 13:05:09 -08002055 s->s_flags |= SB_RDONLY;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002056 }
2057 args.objectid = REISERFS_ROOT_OBJECTID;
2058 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
2059 root_inode =
2060 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002061 reiserfs_init_locked_inode, (void *)&args);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002062 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002063 SWARN(silent, s, "jmacd-10", "get root inode failed");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08002064 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 }
2066
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08002067 /*
2068 * This path assumed to be called with the BKL in the old times.
2069 * Now we have inherited the big reiserfs lock from it and many
2070 * reiserfs helpers called in the mount path and elsewhere require
2071 * this lock to be held even if it's not always necessary. Let's be
2072 * conservative and hold it early. The window can be reduced after
2073 * careful review of the code.
2074 */
2075 reiserfs_write_lock(s);
2076
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002077 if (root_inode->i_state & I_NEW) {
2078 reiserfs_read_locked_inode(root_inode, &args);
2079 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 }
2081
Al Viro48fde702012-01-08 22:15:13 -05002082 s->s_root = d_make_root(root_inode);
2083 if (!s->s_root)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002084 goto error;
Jeff Mahoney098297b2014-04-23 10:00:36 -04002085 /* define and initialize hash function */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002086 sbi->s_hash_function = hash_function(s);
2087 if (sbi->s_hash_function == NULL) {
2088 dput(s->s_root);
2089 s->s_root = NULL;
2090 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002092
2093 if (is_reiserfs_3_5(rs)
2094 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002095 set_bit(REISERFS_3_5, &sbi->s_properties);
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07002096 else if (old_format)
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002097 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002098 else
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002099 set_bit(REISERFS_3_6, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002100
David Howellsbc98a422017-07-17 08:45:34 +01002101 if (!sb_rdonly(s)) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002102
2103 errval = journal_begin(&th, s, 1);
2104 if (errval) {
2105 dput(s->s_root);
2106 s->s_root = NULL;
2107 goto error;
2108 }
2109 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2110
2111 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2112 set_sb_fs_state(rs, 0);
2113
Jeff Mahoney098297b2014-04-23 10:00:36 -04002114 /*
2115 * Clear out s_bmap_nr if it would wrap. We can handle this
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002116 * case, but older revisions can't. This will cause the
2117 * file system to fail mount on those older implementations,
Jeff Mahoney098297b2014-04-23 10:00:36 -04002118 * avoiding corruption. -jeffm
2119 */
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002120 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2121 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002122 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002123 "claims to use %u bitmap blocks in "
2124 "its super block, but requires %u. "
2125 "Clearing to zero.", sb_bmap_nr(rs),
2126 reiserfs_bmap_count(s));
2127
2128 set_sb_bmap_nr(rs, 0);
2129 }
2130
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002131 if (old_format_only(s)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04002132 /*
2133 * filesystem of format 3.5 either with standard
2134 * or non-standard journal
2135 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002136 if (convert_reiserfs(s)) {
2137 /* and -o conv is given */
2138 if (!silent)
2139 reiserfs_info(s,
2140 "converting 3.5 filesystem to the 3.6 format");
2141
2142 if (is_reiserfs_3_5(rs))
Jeff Mahoney098297b2014-04-23 10:00:36 -04002143 /*
2144 * put magic string of 3.6 format.
2145 * 2.2 will not be able to
2146 * mount this filesystem anymore
2147 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002148 memcpy(rs->s_v1.s_magic,
2149 reiserfs_3_6_magic_string,
2150 sizeof
2151 (reiserfs_3_6_magic_string));
2152
2153 set_sb_version(rs, REISERFS_VERSION_2);
2154 reiserfs_convert_objectid_map_v1(s);
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002155 set_bit(REISERFS_3_6, &sbi->s_properties);
2156 clear_bit(REISERFS_3_5, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002157 } else if (!silent) {
2158 reiserfs_info(s, "using 3.5.x disk format\n");
2159 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04002160 } else
2161 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2162
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002163
Jeff Mahoney09f1b802014-04-23 10:00:39 -04002164 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Jeff Mahoney58d85422014-04-23 10:00:38 -04002165 errval = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002166 if (errval) {
2167 dput(s->s_root);
2168 s->s_root = NULL;
2169 goto error;
2170 }
2171
Jeff Mahoney4c051412013-08-08 17:27:19 -04002172 reiserfs_write_unlock(s);
Al Viroedcc37a2009-05-03 06:00:05 -04002173 if ((errval = reiserfs_lookup_privroot(s)) ||
2174 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002175 dput(s->s_root);
2176 s->s_root = NULL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04002177 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002178 }
Jeff Mahoney4c051412013-08-08 17:27:19 -04002179 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002180
Jeff Mahoney098297b2014-04-23 10:00:36 -04002181 /*
2182 * look for files which were to be removed in previous session
2183 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002184 finish_unfinished(s);
2185 } else {
2186 if (old_format_only(s) && !silent) {
2187 reiserfs_info(s, "using 3.5.x disk format\n");
2188 }
2189
Jeff Mahoney4c051412013-08-08 17:27:19 -04002190 reiserfs_write_unlock(s);
Al Viroedcc37a2009-05-03 06:00:05 -04002191 if ((errval = reiserfs_lookup_privroot(s)) ||
2192 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002193 dput(s->s_root);
2194 s->s_root = NULL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04002195 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002196 }
Jeff Mahoney4c051412013-08-08 17:27:19 -04002197 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002198 }
Jeff Mahoney098297b2014-04-23 10:00:36 -04002199 /*
2200 * mark hash in super block: it could be unset. overwrite should be ok
2201 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002202 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2203
2204 handle_attrs(s);
2205
2206 reiserfs_proc_info_init(s);
2207
2208 init_waitqueue_head(&(sbi->s_wait));
2209 spin_lock_init(&sbi->bitmap_lock);
2210
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02002211 reiserfs_write_unlock(s);
2212
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002213 return (0);
2214
Jan Kara00b44192008-07-25 01:46:38 -07002215error:
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04002216 reiserfs_write_unlock(s);
2217
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002218error_unlocked:
2219 /* kill the commit thread, free journal ram */
2220 if (jinit_done) {
2221 reiserfs_write_lock(s);
2222 journal_release_error(NULL, s);
2223 reiserfs_write_unlock(s);
2224 }
2225
Jiri Slabyfa0c5542014-12-12 16:29:29 +01002226 if (sbi->commit_wq)
2227 destroy_workqueue(sbi->commit_wq);
2228
Jan Kara71b05762017-04-05 14:09:48 +02002229 reiserfs_cancel_old_flush(s);
Artem Bityutskiy033369d2012-06-01 17:18:08 +03002230
Jeff Mahoney50652272006-09-30 23:28:44 -07002231 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002232 if (SB_BUFFER_WITH_SB(s))
2233 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07002235 {
2236 int j;
Jan Karaaca60612014-09-10 20:57:45 +02002237 for (j = 0; j < REISERFS_MAXQUOTAS; j++)
Jan Kara00b44192008-07-25 01:46:38 -07002238 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002239 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240#endif
James Lamanna833d3042005-10-30 15:00:16 -08002241 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002243 s->s_fs_info = NULL;
2244 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245}
2246
David Howells726c3342006-06-23 02:02:58 -07002247static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248{
David Howells726c3342006-06-23 02:02:58 -07002249 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002250
2251 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2252 buf->f_bfree = sb_free_blocks(rs);
2253 buf->f_bavail = buf->f_bfree;
2254 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07002255 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002256 /* changed to accommodate gcc folks. */
2257 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07002258 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2259 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2260 sizeof(rs->s_uuid)/2);
2261
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002262 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263}
2264
2265#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266static int reiserfs_write_dquot(struct dquot *dquot)
2267{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002268 struct reiserfs_transaction_handle th;
2269 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002270 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002272 reiserfs_write_lock(dquot->dq_sb);
2273 ret =
2274 journal_begin(&th, dquot->dq_sb,
2275 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2276 if (ret)
2277 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002278 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002279 ret = dquot_commit(dquot);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002280 reiserfs_write_lock_nested(dquot->dq_sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002281 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002282 if (!ret && err)
2283 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002284out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002285 reiserfs_write_unlock(dquot->dq_sb);
2286 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287}
2288
2289static int reiserfs_acquire_dquot(struct dquot *dquot)
2290{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002291 struct reiserfs_transaction_handle th;
2292 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002293 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002295 reiserfs_write_lock(dquot->dq_sb);
2296 ret =
2297 journal_begin(&th, dquot->dq_sb,
2298 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2299 if (ret)
2300 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002301 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002302 ret = dquot_acquire(dquot);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002303 reiserfs_write_lock_nested(dquot->dq_sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002304 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002305 if (!ret && err)
2306 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002307out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002308 reiserfs_write_unlock(dquot->dq_sb);
2309 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310}
2311
2312static int reiserfs_release_dquot(struct dquot *dquot)
2313{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002314 struct reiserfs_transaction_handle th;
2315 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002317 reiserfs_write_lock(dquot->dq_sb);
2318 ret =
2319 journal_begin(&th, dquot->dq_sb,
2320 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara7af11682012-11-13 17:05:14 +01002321 reiserfs_write_unlock(dquot->dq_sb);
Jan Kara9c3013e2007-09-11 15:23:29 -07002322 if (ret) {
2323 /* Release dquot anyway to avoid endless cycle in dqput() */
2324 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002325 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07002326 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002327 ret = dquot_release(dquot);
Jan Kara7af11682012-11-13 17:05:14 +01002328 reiserfs_write_lock(dquot->dq_sb);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002329 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002330 if (!ret && err)
2331 ret = err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002332 reiserfs_write_unlock(dquot->dq_sb);
Jan Kara7af11682012-11-13 17:05:14 +01002333out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002334 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335}
2336
2337static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2338{
Jan Kara45065672008-07-25 01:46:37 -07002339 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002340 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2341 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2342 dquot_mark_dquot_dirty(dquot);
2343 return reiserfs_write_dquot(dquot);
2344 } else
2345 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346}
2347
2348static int reiserfs_write_info(struct super_block *sb, int type)
2349{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002350 struct reiserfs_transaction_handle th;
2351 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002352 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002354 /* Data block + inode block */
2355 reiserfs_write_lock(sb);
2356 ret = journal_begin(&th, sb, 2);
2357 if (ret)
2358 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002359 depth = reiserfs_write_unlock_nested(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002360 ret = dquot_commit_info(sb, type);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002361 reiserfs_write_lock_nested(sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002362 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002363 if (!ret && err)
2364 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002365out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002366 reiserfs_write_unlock(sb);
2367 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002368}
2369
2370/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002371 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002372 */
2373static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2374{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002375 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2376 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377}
2378
2379/*
2380 * Standard function to be called on quota_on
2381 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002382static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Al Viro8c54ca92016-11-20 19:49:34 -05002383 const struct path *path)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002385 int err;
Jan Karad5dee5c2008-04-28 02:16:23 -07002386 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002387 struct reiserfs_transaction_handle th;
Jan Karac3aa0772011-12-21 20:17:10 +01002388 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389
Jan Karab9e06ef2012-11-13 16:34:17 +01002390 reiserfs_write_lock(sb);
2391 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2392 err = -EINVAL;
2393 goto out;
2394 }
Christoph Hellwig307ae182010-05-19 07:16:43 -04002395
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002396 /* Quotafile not on the same filesystem? */
Al Virod8c95842011-12-07 18:16:57 -05002397 if (path->dentry->d_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002398 err = -EXDEV;
2399 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002400 }
David Howells2b0143b2015-03-17 22:25:59 +00002401 inode = d_inode(path->dentry);
Jeff Mahoney098297b2014-04-23 10:00:36 -04002402 /*
2403 * We must not pack tails for quota files on reiserfs for quota
2404 * IO to work
2405 */
Jan Karad5dee5c2008-04-28 02:16:23 -07002406 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2407 err = reiserfs_unpack(inode, NULL);
2408 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002409 reiserfs_warning(sb, "super-6520",
2410 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002411 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002412 err = -EINVAL;
2413 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002414 }
2415 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002416 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002417 /* Journaling quota? */
2418 if (REISERFS_SB(sb)->s_qf_names[type]) {
2419 /* Quotafile not of fs root? */
Jan Karaf00c9e42010-09-15 17:38:58 +02002420 if (path->dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002421 reiserfs_warning(sb, "super-6521",
2422 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002423 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002424 }
2425
2426 /*
2427 * When we journal data on quota file, we have to flush journal to see
2428 * all updates to the file when we bypass pagecache...
2429 */
2430 if (reiserfs_file_data_log(inode)) {
2431 /* Just start temporary transaction and finish it */
2432 err = journal_begin(&th, sb, 1);
2433 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002434 goto out;
Jeff Mahoney58d85422014-04-23 10:00:38 -04002435 err = journal_end_sync(&th);
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002436 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002437 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002438 }
Jan Karab9e06ef2012-11-13 16:34:17 +01002439 reiserfs_write_unlock(sb);
Jan Kara33eb9282017-04-06 16:34:53 +02002440 err = dquot_quota_on(sb, type, format_id, path);
2441 if (!err) {
2442 inode_lock(inode);
2443 REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL |
2444 REISERFS_NOATIME_FL;
2445 inode_set_flags(inode, S_IMMUTABLE | S_NOATIME,
2446 S_IMMUTABLE | S_NOATIME);
2447 inode_unlock(inode);
2448 mark_inode_dirty(inode);
2449 }
2450 return err;
Al Viro77e69da2008-08-01 04:29:18 -04002451out:
Jan Karab9e06ef2012-11-13 16:34:17 +01002452 reiserfs_write_unlock(sb);
Al Viro77e69da2008-08-01 04:29:18 -04002453 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002454}
2455
Jan Kara33eb9282017-04-06 16:34:53 +02002456static int reiserfs_quota_off(struct super_block *sb, int type)
2457{
2458 int err;
2459 struct inode *inode = sb_dqopt(sb)->files[type];
2460
2461 if (!inode || !igrab(inode))
2462 goto out;
2463
2464 err = dquot_quota_off(sb, type);
2465 if (err)
2466 goto out_put;
2467
2468 inode_lock(inode);
2469 REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL |
2470 REISERFS_NOATIME_FL);
2471 inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME);
2472 inode_unlock(inode);
2473 mark_inode_dirty(inode);
2474out_put:
2475 iput(inode);
2476 return err;
2477out:
2478 return dquot_quota_off(sb, type);
2479}
2480
Jeff Mahoney098297b2014-04-23 10:00:36 -04002481/*
2482 * Read data from quotafile - avoid pagecache and such because we cannot afford
Linus Torvalds1da177e2005-04-16 15:20:36 -07002483 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002484 * itself serializes the operations (and no one else should touch the files)
Jeff Mahoney098297b2014-04-23 10:00:36 -04002485 * we don't have to be afraid of races
2486 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002487static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2488 size_t len, loff_t off)
2489{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002490 struct inode *inode = sb_dqopt(sb)->files[type];
2491 unsigned long blk = off >> sb->s_blocksize_bits;
2492 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2493 size_t toread;
2494 struct buffer_head tmp_bh, *bh;
2495 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002497 if (off > i_size)
2498 return 0;
2499 if (off + len > i_size)
2500 len = i_size - off;
2501 toread = len;
2502 while (toread > 0) {
2503 tocopy =
2504 sb->s_blocksize - offset <
2505 toread ? sb->s_blocksize - offset : toread;
2506 tmp_bh.b_state = 0;
Jeff Mahoney098297b2014-04-23 10:00:36 -04002507 /*
2508 * Quota files are without tails so we can safely
2509 * use this function
2510 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002511 reiserfs_write_lock(sb);
2512 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2513 reiserfs_write_unlock(sb);
2514 if (err)
2515 return err;
2516 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2517 memset(data, 0, tocopy);
2518 else {
2519 bh = sb_bread(sb, tmp_bh.b_blocknr);
2520 if (!bh)
2521 return -EIO;
2522 memcpy(data, bh->b_data + offset, tocopy);
2523 brelse(bh);
2524 }
2525 offset = 0;
2526 toread -= tocopy;
2527 data += tocopy;
2528 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002530 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002531}
2532
Jeff Mahoney098297b2014-04-23 10:00:36 -04002533/*
2534 * Write to quotafile (we know the transaction is already started and has
2535 * enough credits)
2536 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2538 const char *data, size_t len, loff_t off)
2539{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002540 struct inode *inode = sb_dqopt(sb)->files[type];
2541 unsigned long blk = off >> sb->s_blocksize_bits;
2542 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2543 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2544 size_t towrite = len;
2545 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546
Jan Kara9c3013e2007-09-11 15:23:29 -07002547 if (!current->journal_info) {
Fabian Frederick53872ed2014-08-08 14:21:10 -07002548 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
Jan Kara9c3013e2007-09-11 15:23:29 -07002549 (unsigned long long)off, (unsigned long long)len);
2550 return -EIO;
2551 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002552 while (towrite > 0) {
2553 tocopy = sb->s_blocksize - offset < towrite ?
2554 sb->s_blocksize - offset : towrite;
2555 tmp_bh.b_state = 0;
Jan Kara361d94a2012-11-13 18:25:38 +01002556 reiserfs_write_lock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002557 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
Jan Kara361d94a2012-11-13 18:25:38 +01002558 reiserfs_write_unlock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002559 if (err)
2560 goto out;
2561 if (offset || tocopy != sb->s_blocksize)
2562 bh = sb_bread(sb, tmp_bh.b_blocknr);
2563 else
2564 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2565 if (!bh) {
2566 err = -EIO;
2567 goto out;
2568 }
2569 lock_buffer(bh);
2570 memcpy(bh->b_data + offset, data, tocopy);
2571 flush_dcache_page(bh->b_page);
2572 set_buffer_uptodate(bh);
2573 unlock_buffer(bh);
Jan Kara361d94a2012-11-13 18:25:38 +01002574 reiserfs_write_lock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002575 reiserfs_prepare_for_journal(sb, bh, 1);
Jeff Mahoney09f1b802014-04-23 10:00:39 -04002576 journal_mark_dirty(current->journal_info, bh);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002577 if (!journal_quota)
2578 reiserfs_add_ordered_list(inode, bh);
Jan Kara361d94a2012-11-13 18:25:38 +01002579 reiserfs_write_unlock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002580 brelse(bh);
2581 offset = 0;
2582 towrite -= tocopy;
2583 data += tocopy;
2584 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002585 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002586out:
Jan Kara67f16482012-04-25 21:28:12 +02002587 if (len == towrite)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002588 return err;
2589 if (inode->i_size < off + len - towrite)
2590 i_size_write(inode, off + len - towrite);
Deepa Dinamani02027d42016-09-14 07:48:05 -07002591 inode->i_mtime = inode->i_ctime = current_time(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002592 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002593 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594}
2595
2596#endif
2597
Al Viro152a0832010-07-25 00:46:55 +04002598static struct dentry *get_super_block(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -07002599 int flags, const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04002600 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002601{
Al Viro152a0832010-07-25 00:46:55 +04002602 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002603}
2604
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002605static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002606{
2607 int ret;
2608
Jeff Mahoney797d9012014-04-23 10:00:34 -04002609 ret = init_inodecache();
2610 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002611 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002612
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002613 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002615 ret = register_filesystem(&reiserfs_fs_type);
Jeff Mahoney797d9012014-04-23 10:00:34 -04002616 if (ret)
2617 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002618
Jeff Mahoney797d9012014-04-23 10:00:34 -04002619 return 0;
2620out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002621 reiserfs_proc_info_global_done();
2622 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623
2624 return ret;
2625}
2626
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002627static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002629 reiserfs_proc_info_global_done();
2630 unregister_filesystem(&reiserfs_fs_type);
2631 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632}
2633
2634struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002635 .owner = THIS_MODULE,
2636 .name = "reiserfs",
Al Viro152a0832010-07-25 00:46:55 +04002637 .mount = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002638 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002639 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002640};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08002641MODULE_ALIAS_FS("reiserfs");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002642
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002643MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2644MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2645MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002646
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002647module_init(init_reiserfs_fs);
2648module_exit(exit_reiserfs_fs);