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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 Frederick17093992014-08-08 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
92 spin_lock(&sbi->old_work_lock);
93 sbi->work_queued = 0;
94 spin_unlock(&sbi->old_work_lock);
95
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070096 reiserfs_sync_fs(s, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097}
98
Artem Bityutskiy033369d2012-06-01 17:18:08 +030099void reiserfs_schedule_old_flush(struct super_block *s)
100{
101 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
102 unsigned long delay;
103
Jan Kara01777832014-08-06 19:43:56 +0200104 /*
105 * Avoid scheduling flush when sb is being shut down. It can race
106 * with journal shutdown and free still queued delayed work.
107 */
108 if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE))
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300109 return;
110
111 spin_lock(&sbi->old_work_lock);
112 if (!sbi->work_queued) {
113 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
114 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
115 sbi->work_queued = 1;
116 }
117 spin_unlock(&sbi->old_work_lock);
118}
119
120static void cancel_old_flush(struct super_block *s)
121{
122 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
123
124 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
125 spin_lock(&sbi->old_work_lock);
126 sbi->work_queued = 0;
127 spin_unlock(&sbi->old_work_lock);
128}
129
Takashi Satoc4be0c12009-01-09 16:40:58 -0800130static int reiserfs_freeze(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700132 struct reiserfs_transaction_handle th;
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300133
134 cancel_old_flush(s);
135
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700136 reiserfs_write_lock(s);
137 if (!(s->s_flags & MS_RDONLY)) {
138 int err = journal_begin(&th, s, 1);
139 if (err) {
140 reiserfs_block_writes(&th);
141 } else {
142 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
143 1);
Jeff Mahoney09f1b802014-04-23 10:00:39 -0400144 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700145 reiserfs_block_writes(&th);
Jeff Mahoney58d85422014-04-23 10:00:38 -0400146 journal_end_sync(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700147 }
148 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700149 reiserfs_write_unlock(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800150 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151}
152
Takashi Satoc4be0c12009-01-09 16:40:58 -0800153static int reiserfs_unfreeze(struct super_block *s)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700154{
155 reiserfs_allow_writes(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800156 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157}
158
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700159extern const struct in_core_key MAX_IN_CORE_KEY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Jeff Mahoney098297b2014-04-23 10:00:36 -0400161/*
162 * this is used to delete "save link" when there are no items of a
163 * file it points to. It can either happen if unlink is completed but
164 * "save unlink" removal, or if file has both unlink and truncate
165 * pending and as unlink completes first (because key of "save link"
166 * protecting unlink is bigger that a key lf "save link" which
167 * protects truncate), so there left no items to make truncate
168 * completion on
169 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700170static int remove_save_link_only(struct super_block *s,
171 struct reiserfs_key *key, int oid_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700173 struct reiserfs_transaction_handle th;
174 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700176 /* we are going to do one balancing */
177 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
178 if (err)
179 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700181 reiserfs_delete_solid_item(&th, NULL, key);
182 if (oid_free)
183 /* removals are protected by direct items */
184 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
185
Jeff Mahoney58d85422014-04-23 10:00:38 -0400186 return journal_end(&th);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189#ifdef CONFIG_QUOTA
190static int reiserfs_quota_on_mount(struct super_block *, int);
191#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193/* look for uncompleted unlinks and truncates and complete them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700194static int finish_unfinished(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700196 INITIALIZE_PATH(path);
197 struct cpu_key max_cpu_key, obj_key;
Lepton Wufb46f342007-10-16 23:30:04 -0700198 struct reiserfs_key save_link_key, last_inode_key;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700199 int retval = 0;
200 struct item_head *ih;
201 struct buffer_head *bh;
202 int item_pos;
203 char *item;
204 int done;
205 struct inode *inode;
206 int truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700208 int i;
209 int ms_active_set;
Jan Karaaca60612014-09-10 20:57:45 +0200210 int quota_enabled[REISERFS_MAXQUOTAS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700212
213 /* compose key to look for "save" links */
214 max_cpu_key.version = KEY_FORMAT_3_5;
215 max_cpu_key.on_disk_key.k_dir_id = ~0U;
216 max_cpu_key.on_disk_key.k_objectid = ~0U;
217 set_cpu_key_k_offset(&max_cpu_key, ~0U);
218 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Lepton Wufb46f342007-10-16 23:30:04 -0700220 memset(&last_inode_key, 0, sizeof(last_inode_key));
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700223 /* Needed for iput() to work correctly and not trash data */
224 if (s->s_flags & MS_ACTIVE) {
225 ms_active_set = 0;
226 } else {
227 ms_active_set = 1;
228 s->s_flags |= MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700230 /* Turn on quotas so that they are updated correctly */
Jan Karaaca60612014-09-10 20:57:45 +0200231 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200232 quota_enabled[i] = 1;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700233 if (REISERFS_SB(s)->s_qf_names[i]) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200234 int ret;
235
236 if (sb_has_quota_active(s, i)) {
237 quota_enabled[i] = 0;
238 continue;
239 }
240 ret = reiserfs_quota_on_mount(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700241 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400242 reiserfs_warning(s, "reiserfs-2500",
243 "cannot turn on journaled "
244 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700245 }
246 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700249 done = 0;
250 REISERFS_SB(s)->s_is_unlinked_ok = 1;
251 while (!retval) {
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400252 int depth;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700253 retval = search_item(s, &max_cpu_key, &path);
254 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400255 reiserfs_error(s, "vs-2140",
256 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700257 break;
258 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700260 bh = get_last_bh(&path);
261 item_pos = get_item_pos(&path);
262 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400263 reiserfs_warning(s, "vs-2060",
264 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700265 break;
266 }
267 item_pos--;
Jeff Mahoney4cf5f7a2014-04-23 10:00:35 -0400268 ih = item_head(bh, item_pos);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700269
270 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
271 /* there are no "save" links anymore */
272 break;
273
274 save_link_key = ih->ih_key;
275 if (is_indirect_le_ih(ih))
276 truncate = 1;
277 else
278 truncate = 0;
279
280 /* reiserfs_iget needs k_dirid and k_objectid only */
Jeff Mahoney4cf5f7a2014-04-23 10:00:35 -0400281 item = ih_item_body(bh, ih);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700282 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
283 obj_key.on_disk_key.k_objectid =
284 le32_to_cpu(ih->ih_key.k_objectid);
285 obj_key.on_disk_key.k_offset = 0;
286 obj_key.on_disk_key.k_type = 0;
287
288 pathrelse(&path);
289
290 inode = reiserfs_iget(s, &obj_key);
291 if (!inode) {
Jeff Mahoney098297b2014-04-23 10:00:36 -0400292 /*
293 * the unlink almost completed, it just did not
294 * manage to remove "save" link and release objectid
295 */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400296 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700297 &obj_key);
298 retval = remove_save_link_only(s, &save_link_key, 1);
299 continue;
300 }
301
302 if (!truncate && inode->i_nlink) {
303 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400304 reiserfs_warning(s, "vs-2185",
305 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700306 &obj_key);
307 retval = remove_save_link_only(s, &save_link_key, 0);
308 continue;
309 }
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400310 depth = reiserfs_write_unlock_nested(inode->i_sb);
Christoph Hellwig871a2932010-03-03 09:05:07 -0500311 dquot_initialize(inode);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400312 reiserfs_write_lock_nested(inode->i_sb, depth);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700313
314 if (truncate && S_ISDIR(inode->i_mode)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -0400315 /*
316 * We got a truncate request for a dir which
317 * is impossible. The only imaginable way is to
318 * execute unfinished truncate request then boot
319 * into old kernel, remove the file and create dir
320 * with the same key.
321 */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400322 reiserfs_warning(s, "green-2101",
323 "impossible truncate on a "
324 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700325 INODE_PKEY(inode));
326 retval = remove_save_link_only(s, &save_link_key, 0);
327 truncate = 0;
328 iput(inode);
329 continue;
330 }
331
332 if (truncate) {
333 REISERFS_I(inode)->i_flags |=
334 i_link_saved_truncate_mask;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400335 /*
336 * not completed truncate found. New size was
337 * committed together with "save" link
338 */
Fabian Frederick53872ed2014-08-08 14:21:10 -0700339 reiserfs_info(s, "Truncating %k to %lld ..",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700340 INODE_PKEY(inode), inode->i_size);
Jeff Mahoney098297b2014-04-23 10:00:36 -0400341
342 /* don't update modification time */
343 reiserfs_truncate_file(inode, 0);
344
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700345 retval = remove_save_link(inode, truncate);
346 } else {
347 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
348 /* not completed unlink (rmdir) found */
349 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700350 if (memcmp(&last_inode_key, INODE_PKEY(inode),
351 sizeof(last_inode_key))){
352 last_inode_key = *INODE_PKEY(inode);
353 /* removal gets completed in iput */
354 retval = 0;
355 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400356 reiserfs_warning(s, "super-2189", "Dead loop "
357 "in finish_unfinished "
358 "detected, just remove "
359 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700360 retval = remove_save_link_only(s,
361 &save_link_key, 0);
362 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700363 }
364
365 iput(inode);
366 printk("done\n");
367 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700369 REISERFS_SB(s)->s_is_unlinked_ok = 0;
370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700372 /* Turn quotas off */
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400373 reiserfs_write_unlock(s);
Jan Karaaca60612014-09-10 20:57:45 +0200374 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200375 if (sb_dqopt(s)->files[i] && quota_enabled[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400376 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700377 }
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400378 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700379 if (ms_active_set)
380 /* Restore the flag back */
381 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700383 pathrelse(&path);
384 if (done)
385 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
386 "Completed\n", done);
387 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700389
Jeff Mahoney098297b2014-04-23 10:00:36 -0400390/*
391 * to protect file being unlinked from getting lost we "safe" link files
392 * being unlinked. This link will be deleted in the same transaction with last
393 * item of file. mounting the filesystem we scan all these links and remove
394 * files which almost got lost
395 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700396void add_save_link(struct reiserfs_transaction_handle *th,
397 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700399 INITIALIZE_PATH(path);
400 int retval;
401 struct cpu_key key;
402 struct item_head ih;
403 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700405 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700407 /* file can only get one "save link" of each kind */
408 RFALSE(truncate &&
409 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
410 "saved link already exists for truncated inode %lx",
411 (long)inode->i_ino);
412 RFALSE(!truncate &&
413 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
414 "saved link already exists for unlinked inode %lx",
415 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700417 /* setup key of "save" link */
418 key.version = KEY_FORMAT_3_5;
419 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
420 key.on_disk_key.k_objectid = inode->i_ino;
421 if (!truncate) {
422 /* unlink, rmdir, rename */
423 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
424 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700426 /* item head of "safe" link */
427 make_le_item_head(&ih, &key, key.version,
428 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
429 4 /*length */ , 0xffff /*free space */ );
430 } else {
431 /* truncate */
432 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400433 reiserfs_warning(inode->i_sb, "green-2102",
434 "Adding a truncate savelink for "
435 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700436 INODE_PKEY(inode));
437 set_cpu_key_k_offset(&key, 1);
438 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700440 /* item head of "safe" link */
441 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
442 4 /*length */ , 0 /*free space */ );
443 }
444 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700446 /* look for its place in the tree */
447 retval = search_item(inode->i_sb, &key, &path);
448 if (retval != ITEM_NOT_FOUND) {
449 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400450 reiserfs_error(inode->i_sb, "vs-2100",
451 "search_by_key (%K) returned %d", &key,
452 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700453 pathrelse(&path);
454 return;
455 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700457 /* body of "save" link */
458 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300460 /* put "save" link into tree, don't charge quota to anyone */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700461 retval =
462 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
463 if (retval) {
464 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400465 reiserfs_error(inode->i_sb, "vs-2120",
466 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700467 } else {
468 if (truncate)
469 REISERFS_I(inode)->i_flags |=
470 i_link_saved_truncate_mask;
471 else
472 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
473 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474}
475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700477int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700479 struct reiserfs_transaction_handle th;
480 struct reiserfs_key key;
481 int err;
482
483 /* we are going to do one balancing only */
484 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
485 if (err)
486 return err;
487
488 /* setup key of "save" link */
489 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
490 key.k_objectid = INODE_PKEY(inode)->k_objectid;
491 if (!truncate) {
492 /* unlink, rmdir, rename */
493 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
494 1 + inode->i_sb->s_blocksize);
495 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
496 } else {
497 /* truncate */
498 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
499 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
500 }
501
502 if ((truncate &&
503 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
504 (!truncate &&
505 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
506 /* don't take quota bytes from anywhere */
507 reiserfs_delete_solid_item(&th, NULL, &key);
508 if (!truncate) {
509 reiserfs_release_objectid(&th, inode->i_ino);
510 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
511 } else
512 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
513
Jeff Mahoney58d85422014-04-23 10:00:38 -0400514 return journal_end(&th);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515}
516
David Howellsedc666e2006-10-11 01:22:14 -0700517static void reiserfs_kill_sb(struct super_block *s)
518{
519 if (REISERFS_SB(s)) {
Al Viro672fe152013-08-05 17:37:37 +0400520 reiserfs_proc_info_done(s);
Jeff Mahoneya9e36da2011-12-21 21:18:43 +0100521 /*
522 * Force any pending inode evictions to occur now. Any
523 * inodes to be removed that have extended attributes
524 * associated with them need to clean them up before
525 * we can release the extended attribute root dentries.
526 * shrink_dcache_for_umount will BUG if we don't release
527 * those before it's called so ->put_super is too late.
528 */
529 shrink_dcache_sb(s);
530
531 dput(REISERFS_SB(s)->xattr_root);
532 REISERFS_SB(s)->xattr_root = NULL;
533 dput(REISERFS_SB(s)->priv_root);
534 REISERFS_SB(s)->priv_root = NULL;
David Howellsedc666e2006-10-11 01:22:14 -0700535 }
536
537 kill_block_super(s);
538}
539
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700540static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700542 struct reiserfs_transaction_handle th;
543 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400545 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
546
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200547 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200548
Jeff Mahoney098297b2014-04-23 10:00:36 -0400549 /*
550 * change file system state to current state if it was mounted
551 * with read-write permissions
552 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700553 if (!(s->s_flags & MS_RDONLY)) {
554 if (!journal_begin(&th, s, 10)) {
555 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
556 1);
557 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
558 REISERFS_SB(s)->s_mount_state);
Jeff Mahoney09f1b802014-04-23 10:00:39 -0400559 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700560 }
561 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
Jeff Mahoney098297b2014-04-23 10:00:36 -0400563 /*
564 * note, journal_release checks for readonly mount, and can
565 * decide not to do a journal_end
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700566 */
567 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Jeff Mahoney50652272006-09-30 23:28:44 -0700569 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700571 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700573 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700575 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400576 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700577 REISERFS_SB(s)->reserved_blocks);
578 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200580 reiserfs_write_unlock(s);
581 mutex_destroy(&REISERFS_SB(s)->lock);
Jeff Mahoney797d9012014-04-23 10:00:34 -0400582 destroy_workqueue(REISERFS_SB(s)->commit_wq);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700583 kfree(s->s_fs_info);
584 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585}
586
Christoph Lametere18b8902006-12-06 20:33:20 -0800587static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
589static struct inode *reiserfs_alloc_inode(struct super_block *sb)
590{
591 struct reiserfs_inode_info *ei;
Firo Yang89bfae42015-06-25 15:03:48 -0700592 ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if (!ei)
594 return NULL;
Al Viro0e4f6a72010-07-04 12:18:57 +0400595 atomic_set(&ei->openers, 0);
596 mutex_init(&ei->tailpack);
Jan Kara53873632014-09-29 15:08:19 +0200597#ifdef CONFIG_QUOTA
598 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
599#endif
600
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 return &ei->vfs_inode;
602}
603
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100604static void reiserfs_i_callback(struct rcu_head *head)
605{
606 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100607 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
608}
609
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610static void reiserfs_destroy_inode(struct inode *inode)
611{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100612 call_rcu(&inode->i_rcu, reiserfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613}
614
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700615static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700617 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Christoph Lametera35afb82007-05-16 22:10:57 -0700619 INIT_LIST_HEAD(&ei->i_prealloc_list);
620 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700622
Fabian Frederick31e14362014-04-03 14:50:37 -0700623static int __init init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624{
625 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700626 sizeof(struct
627 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800628 0, (SLAB_RECLAIM_ACCOUNT|
629 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900630 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 if (reiserfs_inode_cachep == NULL)
632 return -ENOMEM;
633 return 0;
634}
635
636static void destroy_inodecache(void)
637{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000638 /*
639 * Make sure all delayed rcu free inodes are flushed before we
640 * destroy cache.
641 */
642 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700643 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644}
645
646/* we don't mark inodes dirty, we just log them */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400647static void reiserfs_dirty_inode(struct inode *inode, int flags)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700648{
649 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700651 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200652
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700653 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400654 reiserfs_warning(inode->i_sb, "clm-6006",
655 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700656 inode->i_ino);
657 return;
658 }
Jeff Mahoney278f6672013-08-08 17:34:46 -0400659 reiserfs_write_lock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660
Jeff Mahoney098297b2014-04-23 10:00:36 -0400661 /*
662 * this is really only used for atime updates, so they don't have
663 * to be included in O_SYNC or fsync
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700664 */
665 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200666 if (err)
667 goto out;
668
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700669 reiserfs_update_sd(&th, inode);
Jeff Mahoney58d85422014-04-23 10:00:38 -0400670 journal_end(&th);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200671
672out:
Jeff Mahoney278f6672013-08-08 17:34:46 -0400673 reiserfs_write_unlock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674}
675
Jan Karac3aa0772011-12-21 20:17:10 +0100676static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
677{
678 struct super_block *s = root->d_sb;
679 struct reiserfs_journal *journal = SB_JOURNAL(s);
680 long opts = REISERFS_SB(s)->s_mount_opt;
681
682 if (opts & (1 << REISERFS_LARGETAIL))
683 seq_puts(seq, ",tails=on");
684 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
685 seq_puts(seq, ",notail");
686 /* tails=small is default so we don't show it */
687
688 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
689 seq_puts(seq, ",barrier=none");
690 /* barrier=flush is default so we don't show it */
691
692 if (opts & (1 << REISERFS_ERROR_CONTINUE))
693 seq_puts(seq, ",errors=continue");
694 else if (opts & (1 << REISERFS_ERROR_PANIC))
695 seq_puts(seq, ",errors=panic");
696 /* errors=ro is default so we don't show it */
697
698 if (opts & (1 << REISERFS_DATA_LOG))
699 seq_puts(seq, ",data=journal");
700 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
701 seq_puts(seq, ",data=writeback");
702 /* data=ordered is default so we don't show it */
703
704 if (opts & (1 << REISERFS_ATTRS))
705 seq_puts(seq, ",attrs");
706
707 if (opts & (1 << REISERFS_XATTRS_USER))
708 seq_puts(seq, ",user_xattr");
709
710 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
711 seq_puts(seq, ",expose_privroot");
712
713 if (opts & (1 << REISERFS_POSIXACL))
714 seq_puts(seq, ",acl");
715
716 if (REISERFS_SB(s)->s_jdev)
717 seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
718
719 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
720 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
721
722#ifdef CONFIG_QUOTA
723 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
724 seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
725 else if (opts & (1 << REISERFS_USRQUOTA))
726 seq_puts(seq, ",usrquota");
727 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
728 seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
729 else if (opts & (1 << REISERFS_GRPQUOTA))
730 seq_puts(seq, ",grpquota");
731 if (REISERFS_SB(s)->s_jquota_fmt) {
732 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
733 seq_puts(seq, ",jqfmt=vfsold");
734 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
735 seq_puts(seq, ",jqfmt=vfsv0");
736 }
737#endif
738
739 /* Block allocator options */
740 if (opts & (1 << REISERFS_NO_BORDER))
741 seq_puts(seq, ",block-allocator=noborder");
742 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
743 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
744 if (opts & (1 << REISERFS_HASHED_RELOCATION))
745 seq_puts(seq, ",block-allocator=hashed_relocation");
746 if (opts & (1 << REISERFS_TEST4))
747 seq_puts(seq, ",block-allocator=test4");
748 show_alloc_options(seq, s);
749 return 0;
750}
751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700753static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
754 size_t, loff_t);
755static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
756 loff_t);
Jan Kara53873632014-09-29 15:08:19 +0200757
758static struct dquot **reiserfs_get_dquots(struct inode *inode)
759{
760 return REISERFS_I(inode)->i_dquot;
761}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762#endif
763
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800764static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700765 .alloc_inode = reiserfs_alloc_inode,
766 .destroy_inode = reiserfs_destroy_inode,
767 .write_inode = reiserfs_write_inode,
768 .dirty_inode = reiserfs_dirty_inode,
Al Viro845a2cc2010-06-07 11:37:37 -0400769 .evict_inode = reiserfs_evict_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700770 .put_super = reiserfs_put_super,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700771 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800772 .freeze_fs = reiserfs_freeze,
773 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700774 .statfs = reiserfs_statfs,
775 .remount_fs = reiserfs_remount,
Jan Karac3aa0772011-12-21 20:17:10 +0100776 .show_options = reiserfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700778 .quota_read = reiserfs_quota_read,
779 .quota_write = reiserfs_quota_write,
Jan Kara53873632014-09-29 15:08:19 +0200780 .get_dquots = reiserfs_get_dquots,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781#endif
782};
783
784#ifdef CONFIG_QUOTA
785#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
786
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787static int reiserfs_write_dquot(struct dquot *);
788static int reiserfs_acquire_dquot(struct dquot *);
789static int reiserfs_release_dquot(struct dquot *);
790static int reiserfs_mark_dquot_dirty(struct dquot *);
791static int reiserfs_write_info(struct super_block *, int);
Jan Karaf00c9e42010-09-15 17:38:58 +0200792static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700794static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700795 .write_dquot = reiserfs_write_dquot,
796 .acquire_dquot = reiserfs_acquire_dquot,
797 .release_dquot = reiserfs_release_dquot,
798 .mark_dirty = reiserfs_mark_dquot_dirty,
799 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100800 .alloc_dquot = dquot_alloc,
801 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802};
803
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700804static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700805 .quota_on = reiserfs_quota_on,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400806 .quota_off = dquot_quota_off,
807 .quota_sync = dquot_quota_sync,
Jan Kara0a2403392014-11-19 00:42:09 +0100808 .get_state = dquot_get_state,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400809 .set_info = dquot_set_dqinfo,
810 .get_dqblk = dquot_get_dqblk,
811 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812};
813#endif
814
Christoph Hellwig39655162007-10-21 16:42:17 -0700815static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700816 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700817 .fh_to_dentry = reiserfs_fh_to_dentry,
818 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700819 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700820};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
Jeff Mahoney098297b2014-04-23 10:00:36 -0400822/*
823 * this struct is used in reiserfs_getopt () for containing the value for
824 * those mount options that have values rather than being toggles.
825 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700827 char *value;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400828 /*
829 * bitmask which is to set on mount_options bitmask
830 * when this value is found, 0 is no bits are to be changed.
831 */
832 int setmask;
833 /*
834 * bitmask which is to clear on mount_options bitmask
835 * when this value is found, 0 is no bits are to be changed.
836 * This is applied BEFORE setmask
837 */
838 int clrmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839} arg_desc_t;
840
841/* Set this bit in arg_required to allow empty arguments */
842#define REISERFS_OPT_ALLOWEMPTY 31
843
Jeff Mahoney098297b2014-04-23 10:00:36 -0400844/*
845 * this struct is used in reiserfs_getopt() for describing the
846 * set of reiserfs mount options
847 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700849 char *option_name;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400850
851 /* 0 if argument is not required, not 0 otherwise */
852 int arg_required;
853
854 /* list of values accepted by an option */
855 const arg_desc_t *values;
856
857 /*
858 * bitmask which is to set on mount_options bitmask
859 * when this value is found, 0 is no bits are to be changed.
860 */
861 int setmask;
862
863 /*
864 * bitmask which is to clear on mount_options bitmask
865 * when this value is found, 0 is no bits are to be changed.
866 * This is applied BEFORE setmask
867 */
868 int clrmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869} opt_desc_t;
870
871/* possible values for -o data= */
872static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700873 {"ordered", 1 << REISERFS_DATA_ORDERED,
874 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
875 {"journal", 1 << REISERFS_DATA_LOG,
876 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
877 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
878 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800879 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880};
881
882/* possible values for -o barrier= */
883static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700884 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
885 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800886 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887};
888
Jeff Mahoney098297b2014-04-23 10:00:36 -0400889/*
890 * possible values for "-o block-allocator=" and bits which are to be set in
891 * s_mount_opt of reiserfs specific part of in-core super block
892 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700894 {"noborder", 1 << REISERFS_NO_BORDER, 0},
895 {"border", 0, 1 << REISERFS_NO_BORDER},
896 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
897 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
898 {"test4", 1 << REISERFS_TEST4, 0},
899 {"notest4", 0, 1 << REISERFS_TEST4},
900 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901};
902
903static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700904 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
905 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
906 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
907 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908};
909
910static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700911 {"panic", 1 << REISERFS_ERROR_PANIC,
912 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
913 {"ro-remount", 1 << REISERFS_ERROR_RO,
914 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700916 {"continue", 1 << REISERFS_ERROR_CONTINUE,
917 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700919 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920};
921
Jeff Mahoney098297b2014-04-23 10:00:36 -0400922/*
923 * proceed only one option from a list *cur - string containing of mount
924 * options
925 * opts - array of options which are accepted
926 * opt_arg - if option is found and requires an argument and if it is specifed
927 * in the input - pointer to the argument is stored here
928 * bit_flags - if option requires to set a certain bit - it is set here
929 * return -1 if unknown option is found, opt->arg_required otherwise
930 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700931static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
932 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700934 char *p;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400935 /*
936 * foo=bar,
937 * ^ ^ ^
938 * | | +-- option_end
939 * | +-- arg_start
940 * +-- option_start
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700941 */
942 const opt_desc_t *opt;
943 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700945 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700947 /* assume argument cannot contain commas */
948 *cur = strchr(p, ',');
949 if (*cur) {
950 *(*cur) = '\0';
951 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700954 if (!strncmp(p, "alloc=", 6)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -0400955 /*
956 * Ugly special case, probably we should redo options
957 * parser so that it can understand several arguments for
958 * some options, also so that it can fill several bitfields
959 * with option values.
960 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700961 if (reiserfs_parse_alloc_options(s, p + 6)) {
962 return -1;
963 } else {
964 return 0;
965 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700967
968 /* for every option in the list */
969 for (opt = opts; opt->option_name; opt++) {
970 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
971 if (bit_flags) {
972 if (opt->clrmask ==
973 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400974 reiserfs_warning(s, "super-6500",
975 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700976 p);
977 else
978 *bit_flags &= ~opt->clrmask;
979 if (opt->setmask ==
980 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400981 reiserfs_warning(s, "super-6501",
982 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700983 p);
984 else
985 *bit_flags |= opt->setmask;
986 }
987 break;
988 }
989 }
990 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400991 reiserfs_warning(s, "super-6502",
992 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700993 return -1;
994 }
995
996 p += strlen(opt->option_name);
997 switch (*p) {
998 case '=':
999 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001000 reiserfs_warning(s, "super-6503",
1001 "the option \"%s\" does not "
1002 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001003 opt->option_name);
1004 return -1;
1005 }
1006 break;
1007
1008 case 0:
1009 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001010 reiserfs_warning(s, "super-6504",
1011 "the option \"%s\" requires an "
1012 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001013 return -1;
1014 }
1015 break;
1016 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001017 reiserfs_warning(s, "super-6505",
1018 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001019 opt->option_name);
1020 return -1;
1021 }
1022
Jeff Mahoney098297b2014-04-23 10:00:36 -04001023 /*
1024 * move to the argument, or to next option if argument is not
1025 * required
1026 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001027 p++;
1028
1029 if (opt->arg_required
1030 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1031 && !strlen(p)) {
1032 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001033 reiserfs_warning(s, "super-6506",
1034 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001035 opt->option_name);
1036 return -1;
1037 }
1038
1039 if (!opt->values) {
1040 /* *=NULLopt_arg contains pointer to argument */
1041 *opt_arg = p;
1042 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1043 }
1044
1045 /* values possible for this option are listed in opt->values */
1046 for (arg = opt->values; arg->value; arg++) {
1047 if (!strcmp(p, arg->value)) {
1048 if (bit_flags) {
1049 *bit_flags &= ~arg->clrmask;
1050 *bit_flags |= arg->setmask;
1051 }
1052 return opt->arg_required;
1053 }
1054 }
1055
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001056 reiserfs_warning(s, "super-6506",
1057 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001058 opt->option_name);
1059 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060}
1061
1062/* returns 0 if something is wrong in option string, 1 - otherwise */
Jeff Mahoney098297b2014-04-23 10:00:36 -04001063static int reiserfs_parse_options(struct super_block *s,
1064
1065 /* string given via mount's -o */
1066 char *options,
1067
1068 /*
1069 * after the parsing phase, contains the
1070 * collection of bitflags defining what
1071 * mount options were selected.
1072 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001073 unsigned long *mount_options,
Jeff Mahoney098297b2014-04-23 10:00:36 -04001074
1075 /* strtol-ed from NNN of resize=NNN */
1076 unsigned long *blocks,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001077 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001078 unsigned int *commit_max_age,
1079 char **qf_names,
1080 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001082 int c;
1083 char *arg = NULL;
1084 char *pos;
1085 opt_desc_t opts[] = {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001086 /*
1087 * Compatibility stuff, so that -o notail for old
1088 * setups still work
1089 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001090 {"tails",.arg_required = 't',.values = tails},
1091 {"notail",.clrmask =
1092 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1093 {"conv",.setmask = 1 << REISERFS_CONVERT},
1094 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1095 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -04001096 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001098 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1099 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001101 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1102 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103#endif
1104#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001105 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1106 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001108 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1109 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001111 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001112 {"replayonly",.setmask = 1 << REPLAYONLY},
1113 {"block-allocator",.arg_required = 'a',.values = balloc},
1114 {"data",.arg_required = 'd',.values = logging_mode},
1115 {"barrier",.arg_required = 'b',.values = barrier_mode},
1116 {"resize",.arg_required = 'r',.values = NULL},
1117 {"jdev",.arg_required = 'j',.values = NULL},
1118 {"nolargeio",.arg_required = 'w',.values = NULL},
1119 {"commit",.arg_required = 'c',.values = NULL},
Jan Karac3aa0772011-12-21 20:17:10 +01001120 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1121 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1122 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001123 {"errors",.arg_required = 'e',.values = error_actions},
1124 {"usrjquota",.arg_required =
1125 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1126 {"grpjquota",.arg_required =
1127 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1128 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001129 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001130 };
1131
1132 *blocks = 0;
1133 if (!options || !*options)
Jeff Mahoney098297b2014-04-23 10:00:36 -04001134 /*
1135 * use default configuration: create tails, journaling on, no
1136 * conversion to newest format
1137 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001138 return 1;
1139
1140 for (pos = options; pos;) {
1141 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1142 if (c == -1)
1143 /* wrong option is given */
1144 return 0;
1145
1146 if (c == 'r') {
1147 char *p;
1148
1149 p = NULL;
1150 /* "resize=NNN" or "resize=auto" */
1151
1152 if (!strcmp(arg, "auto")) {
1153 /* From JFS code, to auto-get the size. */
1154 *blocks =
1155 s->s_bdev->bd_inode->i_size >> s->
1156 s_blocksize_bits;
1157 } else {
1158 *blocks = simple_strtoul(arg, &p, 0);
1159 if (*p != '\0') {
1160 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001161 reiserfs_warning(s, "super-6507",
1162 "bad value %s for "
1163 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001164 return 0;
1165 }
1166 }
1167 }
1168
1169 if (c == 'c') {
1170 char *p = NULL;
1171 unsigned long val = simple_strtoul(arg, &p, 0);
1172 /* commit=NNN (time in seconds) */
1173 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001174 reiserfs_warning(s, "super-6508",
1175 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001176 arg);
1177 return 0;
1178 }
1179 *commit_max_age = (unsigned int)val;
1180 }
1181
1182 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001183 reiserfs_warning(s, "super-6509", "nolargeio option "
1184 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -07001185 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001186 }
1187
1188 if (c == 'j') {
1189 if (arg && *arg && jdev_name) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001190 /* Hm, already assigned? */
1191 if (*jdev_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001192 reiserfs_warning(s, "super-6510",
1193 "journal device was "
1194 "already specified to "
1195 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001196 return 0;
1197 }
1198 *jdev_name = arg;
1199 }
1200 }
1201#ifdef CONFIG_QUOTA
1202 if (c == 'u' || c == 'g') {
1203 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1204
Jan Kara6929f892008-08-20 18:16:36 +02001205 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001206 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001207 reiserfs_warning(s, "super-6511",
1208 "cannot change journaled "
1209 "quota options when quota "
1210 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001211 return 0;
1212 }
1213 if (*arg) { /* Some filename specified? */
1214 if (REISERFS_SB(s)->s_qf_names[qtype]
1215 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1216 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001217 reiserfs_warning(s, "super-6512",
1218 "%s quota file "
1219 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001220 QTYPE2NAME(qtype));
1221 return 0;
1222 }
1223 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001224 reiserfs_warning(s, "super-6513",
1225 "quotafile must be "
1226 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001227 return 0;
1228 }
Ionut-Gabriel Raduaf591ad2013-03-10 15:06:23 +02001229 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001230 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001231 reiserfs_warning(s, "reiserfs-2502",
1232 "not enough memory "
1233 "for storing "
1234 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001235 return 0;
1236 }
Jan Karac3aa0772011-12-21 20:17:10 +01001237 if (qtype == USRQUOTA)
1238 *mount_options |= 1 << REISERFS_USRQUOTA;
1239 else
1240 *mount_options |= 1 << REISERFS_GRPQUOTA;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001241 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001242 if (qf_names[qtype] !=
1243 REISERFS_SB(s)->s_qf_names[qtype])
1244 kfree(qf_names[qtype]);
1245 qf_names[qtype] = NULL;
Jan Karac3aa0772011-12-21 20:17:10 +01001246 if (qtype == USRQUOTA)
1247 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1248 else
1249 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001250 }
1251 }
1252 if (c == 'f') {
1253 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001254 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001255 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001256 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001257 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001258 reiserfs_warning(s, "super-6514",
1259 "unknown quota format "
1260 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001261 return 0;
1262 }
Jan Kara6929f892008-08-20 18:16:36 +02001263 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001264 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001265 reiserfs_warning(s, "super-6515",
1266 "cannot change journaled "
1267 "quota options when quota "
1268 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001269 return 0;
1270 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001271 }
1272#else
1273 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001274 reiserfs_warning(s, "reiserfs-2503", "journaled "
1275 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001276 return 0;
1277 }
1278#endif
1279 }
1280
1281#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001282 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1283 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001284 reiserfs_warning(s, "super-6515",
1285 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001286 return 0;
1287 }
Jan Karac3aa0772011-12-21 20:17:10 +01001288 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1289 sb_has_quota_loaded(s, USRQUOTA)) ||
1290 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1291 sb_has_quota_loaded(s, GRPQUOTA))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001292 reiserfs_warning(s, "super-6516", "quota options must "
1293 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001294 return 0;
1295 }
1296#endif
1297
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299}
1300
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001301static void switch_data_mode(struct super_block *s, unsigned long mode)
1302{
1303 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1304 (1 << REISERFS_DATA_ORDERED) |
1305 (1 << REISERFS_DATA_WRITEBACK));
1306 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307}
1308
1309static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1310{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001311 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1312 if (!reiserfs_data_log(s)) {
1313 switch_data_mode(s, REISERFS_DATA_LOG);
1314 reiserfs_info(s, "switching to journaled data mode\n");
1315 }
1316 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1317 if (!reiserfs_data_ordered(s)) {
1318 switch_data_mode(s, REISERFS_DATA_ORDERED);
1319 reiserfs_info(s, "switching to ordered data mode\n");
1320 }
1321 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1322 if (!reiserfs_data_writeback(s)) {
1323 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1324 reiserfs_info(s, "switching to writeback data mode\n");
1325 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327}
1328
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001329static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001331 int flush = (1 << REISERFS_BARRIER_FLUSH);
1332 int none = (1 << REISERFS_BARRIER_NONE);
1333 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001335 if (bits & all_barrier) {
1336 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1337 if (bits & flush) {
1338 REISERFS_SB(s)->s_mount_opt |= flush;
1339 printk("reiserfs: enabling write barrier flush mode\n");
1340 } else if (bits & none) {
1341 REISERFS_SB(s)->s_mount_opt |= none;
1342 printk("reiserfs: write barriers turned off\n");
1343 }
1344 }
1345}
1346
1347static void handle_attrs(struct super_block *s)
1348{
1349 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1350
1351 if (reiserfs_attrs(s)) {
1352 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001353 reiserfs_warning(s, "super-6517", "cannot support "
1354 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001355 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 return;
1357 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001358 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001359 reiserfs_warning(s, "super-6518", "cannot support "
1360 "attributes until flag is set in "
1361 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001362 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 }
1364 }
1365}
1366
Jan Kara00b44192008-07-25 01:46:38 -07001367#ifdef CONFIG_QUOTA
1368static void handle_quota_files(struct super_block *s, char **qf_names,
1369 unsigned int *qfmt)
1370{
1371 int i;
1372
Jan Karaaca60612014-09-10 20:57:45 +02001373 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
Jan Kara00b44192008-07-25 01:46:38 -07001374 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1375 kfree(REISERFS_SB(s)->s_qf_names[i]);
1376 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1377 }
Jan Karaa06d7892011-12-21 17:35:34 +01001378 if (*qfmt)
1379 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
Jan Kara00b44192008-07-25 01:46:38 -07001380}
1381#endif
1382
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001383static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001385 struct reiserfs_super_block *rs;
1386 struct reiserfs_transaction_handle th;
1387 unsigned long blocks;
1388 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1389 unsigned long safe_mask = 0;
1390 unsigned int commit_max_age = (unsigned int)-1;
1391 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001392 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001393 int err;
Jan Karaaca60612014-09-10 20:57:45 +02001394 char *qf_names[REISERFS_MAXQUOTAS];
Jan Kara00b44192008-07-25 01:46:38 -07001395 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001397 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001398#endif
Jan Kara00b44192008-07-25 01:46:38 -07001399
Theodore Ts'o02b99842014-03-13 10:14:33 -04001400 sync_filesystem(s);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001401 reiserfs_write_lock(s);
1402
1403#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001404 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405#endif
1406
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001407 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001409 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001410 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1411 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412#ifdef CONFIG_QUOTA
Jan Karaaca60612014-09-10 20:57:45 +02001413 for (i = 0; i < REISERFS_MAXQUOTAS; i++)
Jan Kara00b44192008-07-25 01:46:38 -07001414 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1415 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001416#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001417 err = -EINVAL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04001418 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419 }
Jan Kara00b44192008-07-25 01:46:38 -07001420#ifdef CONFIG_QUOTA
1421 handle_quota_files(s, qf_names, &qfmt);
1422#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001424 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001426 /* Add options that are safe here */
1427 safe_mask |= 1 << REISERFS_SMALLTAIL;
1428 safe_mask |= 1 << REISERFS_LARGETAIL;
1429 safe_mask |= 1 << REISERFS_NO_BORDER;
1430 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1431 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1432 safe_mask |= 1 << REISERFS_TEST4;
1433 safe_mask |= 1 << REISERFS_ATTRS;
1434 safe_mask |= 1 << REISERFS_XATTRS_USER;
1435 safe_mask |= 1 << REISERFS_POSIXACL;
1436 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1437 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1438 safe_mask |= 1 << REISERFS_ERROR_RO;
1439 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1440 safe_mask |= 1 << REISERFS_ERROR_PANIC;
Jan Karac3aa0772011-12-21 20:17:10 +01001441 safe_mask |= 1 << REISERFS_USRQUOTA;
1442 safe_mask |= 1 << REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443
Jeff Mahoney098297b2014-04-23 10:00:36 -04001444 /*
1445 * Update the bitmask, taking care to keep
1446 * the bits we're not allowed to change here
1447 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001448 REISERFS_SB(s)->s_mount_opt =
1449 (REISERFS_SB(s)->
1450 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001452 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1453 journal->j_max_commit_age = commit_max_age;
1454 journal->j_max_trans_age = commit_max_age;
1455 } else if (commit_max_age == 0) {
1456 /* 0 means restore defaults. */
1457 journal->j_max_commit_age = journal->j_default_max_commit_age;
1458 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1459 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001461 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001462 err = reiserfs_resize(s, blocks);
1463 if (err != 0)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001464 goto out_err_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001465 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001467 if (*mount_flags & MS_RDONLY) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001468 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001469 reiserfs_xattr_init(s, *mount_flags);
1470 /* remount read-only */
1471 if (s->s_flags & MS_RDONLY)
1472 /* it is read-only already */
Jeff Mahoney4c051412013-08-08 17:27:19 -04001473 goto out_ok_unlocked;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001474
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001475 err = dquot_suspend(s, -1);
1476 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001477 goto out_err;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001478
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001479 /* try to remount file system with read-only permissions */
1480 if (sb_umount_state(rs) == REISERFS_VALID_FS
1481 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001482 goto out_ok_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001483 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484
Jeff Mahoney4c051412013-08-08 17:27:19 -04001485 reiserfs_write_lock(s);
1486
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001487 err = journal_begin(&th, s, 10);
1488 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001489 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001491 /* Mounting a rw partition read-only. */
1492 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1493 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
Jeff Mahoney09f1b802014-04-23 10:00:39 -04001494 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001495 } else {
1496 /* remount read-write */
1497 if (!(s->s_flags & MS_RDONLY)) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001498 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001499 reiserfs_xattr_init(s, *mount_flags);
Jeff Mahoney4c051412013-08-08 17:27:19 -04001500 goto out_ok_unlocked; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001501 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001503 if (reiserfs_is_journal_aborted(journal)) {
1504 err = journal->j_errno;
Jeff Mahoney4c051412013-08-08 17:27:19 -04001505 goto out_err_unlock;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001506 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001508 handle_data_mode(s, mount_options);
1509 handle_barrier_mode(s, mount_options);
1510 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001511
1512 /* now it is safe to call journal_begin */
1513 s->s_flags &= ~MS_RDONLY;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001514 err = journal_begin(&th, s, 10);
1515 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001516 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001518 /* Mount a partition which is read-only, read-write */
1519 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1520 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1521 s->s_flags &= ~MS_RDONLY;
1522 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001523 if (!old_format_only(s))
1524 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001525 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
Jeff Mahoney09f1b802014-04-23 10:00:39 -04001526 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001527 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1528 }
1529 /* this will force a full flush of all journal lists */
1530 SB_JOURNAL(s)->j_must_wait = 1;
Jeff Mahoney58d85422014-04-23 10:00:38 -04001531 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001532 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001533 goto out_err_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001534
Jeff Mahoney4c051412013-08-08 17:27:19 -04001535 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001536 if (!(*mount_flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001537 dquot_resume(s, -1);
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001538 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001539 finish_unfinished(s);
Jeff Mahoney4c051412013-08-08 17:27:19 -04001540 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001541 reiserfs_xattr_init(s, *mount_flags);
1542 }
1543
Jeff Mahoney4c051412013-08-08 17:27:19 -04001544out_ok_unlocked:
Al Viro2a32ceb2009-05-08 16:05:57 -04001545 replace_mount_options(s, new_opts);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001546 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001547
Jeff Mahoney4c051412013-08-08 17:27:19 -04001548out_err_unlock:
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001549 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001550out_err:
1551 kfree(new_opts);
1552 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553}
1554
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001555static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001557 struct buffer_head *bh;
1558 struct reiserfs_super_block *rs;
1559 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001561 bh = sb_bread(s, offset / s->s_blocksize);
1562 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001563 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001564 "bread failed (dev %s, block %lu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001565 s->s_id, offset / s->s_blocksize,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001566 s->s_blocksize);
1567 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001570 rs = (struct reiserfs_super_block *)bh->b_data;
1571 if (!is_any_reiserfs_magic_string(rs)) {
1572 brelse(bh);
1573 return 1;
1574 }
Jeff Mahoney098297b2014-04-23 10:00:36 -04001575 /*
1576 * ok, reiserfs signature (old or new) found in at the given offset
1577 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001578 fs_blocksize = sb_blocksize(rs);
1579 brelse(bh);
1580 sb_set_blocksize(s, fs_blocksize);
1581
1582 bh = sb_bread(s, offset / s->s_blocksize);
1583 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001584 reiserfs_warning(s, "sh-2007",
1585 "bread failed (dev %s, block %lu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001586 s->s_id, offset / s->s_blocksize,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001587 s->s_blocksize);
1588 return 1;
1589 }
1590
1591 rs = (struct reiserfs_super_block *)bh->b_data;
1592 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001593 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
Fabian Frederick53872ed2014-08-08 14:21:10 -07001594 "filesystem on (dev %s, block %llu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001595 s->s_id,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001596 (unsigned long long)bh->b_blocknr,
1597 s->s_blocksize);
1598 brelse(bh);
1599 return 1;
1600 }
1601
1602 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1603 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001604 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1605 "--rebuild-tree run detected. Please run\n"
1606 "reiserfsck --rebuild-tree and wait for a "
1607 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001608 "get newer reiserfsprogs package");
1609 return 1;
1610 }
1611
1612 SB_BUFFER_WITH_SB(s) = bh;
1613 SB_DISK_SUPER_BLOCK(s) = rs;
1614
Jeff Mahoney098297b2014-04-23 10:00:36 -04001615 /*
1616 * magic is of non-standard journal filesystem, look at s_version to
1617 * find which format is in use
1618 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001619 if (is_reiserfs_jr(rs)) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001620 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001621 reiserfs_info(s, "found reiserfs format \"3.6\""
1622 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001623 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001624 reiserfs_info(s, "found reiserfs format \"3.5\""
1625 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001626 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001627 reiserfs_warning(s, "sh-2012", "found unknown "
1628 "format \"%u\" of reiserfs with "
1629 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001630 return 1;
1631 }
1632 } else
Jeff Mahoney098297b2014-04-23 10:00:36 -04001633 /*
1634 * s_version of standard format may contain incorrect
1635 * information, so we just look at the magic string
1636 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001637 reiserfs_info(s,
1638 "found reiserfs format \"%s\" with standard journal\n",
1639 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1640
1641 s->s_op = &reiserfs_sops;
1642 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001644 s->s_qcop = &reiserfs_qctl_operations;
1645 s->dq_op = &reiserfs_quota_operations;
Jan Kara53873632014-09-29 15:08:19 +02001646 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647#endif
1648
Jeff Mahoney098297b2014-04-23 10:00:36 -04001649 /*
1650 * new format is limited by the 32 bit wide i_blocks field, want to
1651 * be one full block below that.
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001652 */
1653 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1654 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655}
1656
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001658static int reread_meta_blocks(struct super_block *s)
1659{
Jeff Mahoneya228bf82014-04-23 10:00:42 -04001660 ll_rw_block(READ, 1, &SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001661 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1662 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001663 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001664 return 1;
1665 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001667 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668}
1669
Jeff Mahoney098297b2014-04-23 10:00:36 -04001670/* hash detection stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671
Jeff Mahoney098297b2014-04-23 10:00:36 -04001672/*
1673 * if root directory is empty - we set default - Yura's - hash and
1674 * warn about it
1675 * FIXME: we look for only one name in a directory. If tea and yura
1676 * both have the same value - we ask user to send report to the
1677 * mailing list
1678 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001679static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001681 int retval;
1682 struct inode *inode;
1683 struct cpu_key key;
1684 INITIALIZE_PATH(path);
1685 struct reiserfs_dir_entry de;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001686 struct reiserfs_de_head *deh;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001687 __u32 hash = DEFAULT_HASH;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001688 __u32 deh_hashval, teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689
David Howells2b0143b2015-03-17 22:25:59 +00001690 inode = d_inode(s->s_root);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001692 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1693 retval = search_by_entry_key(s, &key, &path, &de);
1694 if (retval == IO_ERROR) {
1695 pathrelse(&path);
1696 return UNSET_HASH;
1697 }
1698 if (retval == NAME_NOT_FOUND)
1699 de.de_entry_num--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001701 set_de_name_and_namelen(&de);
1702 deh = de.de_deh + de.de_entry_num;
1703
1704 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1705 /* allow override in this case */
1706 if (reiserfs_rupasov_hash(s))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001707 hash = YURA_HASH;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001708 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1709 goto out;
1710 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001712 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1713 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1714 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1715 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1716
1717 if ((teahash == r5hash && deh_hashval == r5hash) ||
1718 (teahash == yurahash && deh_hashval == yurahash) ||
1719 (r5hash == yurahash && deh_hashval == yurahash)) {
1720 reiserfs_warning(s, "reiserfs-2506",
1721 "Unable to automatically detect hash "
1722 "function. Please mount with -o "
1723 "hash={tea,rupasov,r5}");
1724 hash = UNSET_HASH;
1725 goto out;
1726 }
1727
1728 if (deh_hashval == yurahash)
1729 hash = YURA_HASH;
1730 else if (deh_hashval == teahash)
1731 hash = TEA_HASH;
1732 else if (deh_hashval == r5hash)
1733 hash = R5_HASH;
1734 else {
1735 reiserfs_warning(s, "reiserfs-2506",
1736 "Unrecognised hash function");
1737 hash = UNSET_HASH;
1738 }
1739out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001740 pathrelse(&path);
1741 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742}
1743
Jeff Mahoney098297b2014-04-23 10:00:36 -04001744/* finds out which hash names are sorted with */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001745static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001747 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001749 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750
Jeff Mahoney098297b2014-04-23 10:00:36 -04001751 /*
1752 * reiserfs_hash_detect() == true if any of the hash mount options
1753 * were used. We must check them to make sure the user isn't
1754 * using a bad hash value
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001755 */
1756 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1757 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001759 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001760 /*
1761 * detection has found the hash, and we must check against the
1762 * mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001763 */
1764 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001765 reiserfs_warning(s, "reiserfs-2507",
1766 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001767 "unable to force rupasov hash",
1768 reiserfs_hashname(code));
1769 code = UNSET_HASH;
1770 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001771 reiserfs_warning(s, "reiserfs-2508",
1772 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001773 "unable to force tea hash",
1774 reiserfs_hashname(code));
1775 code = UNSET_HASH;
1776 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001777 reiserfs_warning(s, "reiserfs-2509",
1778 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001779 "unable to force r5 hash",
1780 reiserfs_hashname(code));
1781 code = UNSET_HASH;
1782 }
1783 } else {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001784 /*
1785 * find_hash_out was not called or
1786 * could not determine the hash
1787 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001788 if (reiserfs_rupasov_hash(s)) {
1789 code = YURA_HASH;
1790 } else if (reiserfs_tea_hash(s)) {
1791 code = TEA_HASH;
1792 } else if (reiserfs_r5_hash(s)) {
1793 code = R5_HASH;
1794 }
1795 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796
Jeff Mahoney098297b2014-04-23 10:00:36 -04001797 /*
1798 * if we are mounted RW, and we have a new valid hash code, update
1799 * the super
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001800 */
1801 if (code != UNSET_HASH &&
1802 !(s->s_flags & MS_RDONLY) &&
1803 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1804 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1805 }
1806 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807}
1808
Jeff Mahoney098297b2014-04-23 10:00:36 -04001809/* return pointer to appropriate function */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001810static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001812 switch (what_hash(s)) {
1813 case TEA_HASH:
1814 reiserfs_info(s, "Using tea hash to sort names\n");
1815 return keyed_hash;
1816 case YURA_HASH:
1817 reiserfs_info(s, "Using rupasov hash to sort names\n");
1818 return yura_hash;
1819 case R5_HASH:
1820 reiserfs_info(s, "Using r5 hash to sort names\n");
1821 return r5_hash;
1822 }
1823 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824}
1825
Jeff Mahoney098297b2014-04-23 10:00:36 -04001826/* this is used to set up correct value for old partitions */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001827static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001829 if (func == keyed_hash)
1830 return TEA_HASH;
1831 if (func == yura_hash)
1832 return YURA_HASH;
1833 if (func == r5_hash)
1834 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835
Jeff Mahoney098297b2014-04-23 10:00:36 -04001836 BUG(); /* should never happen */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001838 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839}
1840
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001841#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001843 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001845static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001847 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001848 struct reiserfs_transaction_handle th;
1849 int old_format = 0;
1850 unsigned long blocks;
1851 unsigned int commit_max_age = 0;
1852 int jinit_done = 0;
1853 struct reiserfs_iget_args args;
1854 struct reiserfs_super_block *rs;
1855 char *jdev_name;
1856 struct reiserfs_sb_info *sbi;
1857 int errval = -EINVAL;
Jan Karaaca60612014-09-10 20:57:45 +02001858 char *qf_names[REISERFS_MAXQUOTAS] = {};
Jan Kara00b44192008-07-25 01:46:38 -07001859 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001861 save_mount_options(s, data);
1862
Yan Burman01afb212006-12-06 20:39:01 -08001863 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001864 if (!sbi)
1865 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001866 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001867 /* Set default values for options: non-aggressive tails, RO on errors */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001868 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1869 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1870 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001871 /* no preallocation minimum, be smart in reiserfs_file_write instead */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001872 sbi->s_alloc_options.preallocmin = 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001873 /* Preallocate by 16 blocks (17-1) at once */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001874 sbi->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001875 /* setup default block allocator options */
1876 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877
Artem Bityutskiy033369d2012-06-01 17:18:08 +03001878 spin_lock_init(&sbi->old_work_lock);
1879 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001880 mutex_init(&sbi->lock);
1881 sbi->lock_depth = -1;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001882
Jeff Mahoney797d9012014-04-23 10:00:34 -04001883 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1884 s->s_id);
1885 if (!sbi->commit_wq) {
1886 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1887 errval = -ENOMEM;
1888 goto error_unlocked;
1889 }
1890
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001891 jdev_name = NULL;
1892 if (reiserfs_parse_options
Jeff Mahoneya228bf82014-04-23 10:00:42 -04001893 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001894 &commit_max_age, qf_names, &qfmt) == 0) {
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001895 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001896 }
Jan Karac3aa0772011-12-21 20:17:10 +01001897 if (jdev_name && jdev_name[0]) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001898 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1899 if (!sbi->s_jdev) {
Jan Karac3aa0772011-12-21 20:17:10 +01001900 SWARN(silent, s, "", "Cannot allocate memory for "
1901 "journal device name");
1902 goto error;
1903 }
1904 }
Jan Kara00b44192008-07-25 01:46:38 -07001905#ifdef CONFIG_QUOTA
1906 handle_quota_files(s, qf_names, &qfmt);
1907#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001909 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001910 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001911 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001912 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913
Jeff Mahoney098297b2014-04-23 10:00:36 -04001914 /*
1915 * try old format (undistributed bitmap, super block in 8-th 1k
1916 * block of a device)
1917 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001918 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1919 old_format = 1;
Jeff Mahoney098297b2014-04-23 10:00:36 -04001920
1921 /*
1922 * try new format (64-th 1k block), which can contain reiserfs
1923 * super block
1924 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001925 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001926 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Al Viro2ccdc412013-11-22 13:25:39 -05001927 s->s_id);
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001928 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001929 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001931 rs = SB_DISK_SUPER_BLOCK(s);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001932 /*
1933 * Let's do basic sanity check to verify that underlying device is not
1934 * smaller than the filesystem. If the check fails then abort and
1935 * scream, because bad stuff will happen otherwise.
1936 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001937 if (s->s_bdev && s->s_bdev->bd_inode
1938 && i_size_read(s->s_bdev->bd_inode) <
1939 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001940 SWARN(silent, s, "", "Filesystem cannot be "
1941 "mounted because it is bigger than the device");
1942 SWARN(silent, s, "", "You may need to run fsck "
1943 "or increase size of your LVM partition");
1944 SWARN(silent, s, "", "Or may be you forgot to "
1945 "reboot after fdisk when it told you to");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001946 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001947 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001949 sbi->s_mount_state = SB_REISERFS_STATE(s);
1950 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951
Jeff Mahoney6f010462006-09-30 23:28:43 -07001952 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001953 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001954 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001955 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001956
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001957 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001959 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1960 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961#endif
1962
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001963 /* make data=ordered the default */
1964 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1965 !reiserfs_data_writeback(s)) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001966 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967 }
1968
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001969 if (reiserfs_data_log(s)) {
1970 reiserfs_info(s, "using journaled data mode\n");
1971 } else if (reiserfs_data_ordered(s)) {
1972 reiserfs_info(s, "using ordered data mode\n");
1973 } else {
1974 reiserfs_info(s, "using writeback data mode\n");
1975 }
1976 if (reiserfs_barrier_flush(s)) {
1977 printk("reiserfs: using flush barriers\n");
1978 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001979
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08001980 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1981 SWARN(silent, s, "sh-2022",
1982 "unable to initialize journal space");
1983 goto error_unlocked;
1984 } else {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001985 /*
1986 * once this is set, journal_release must be called
1987 * if we error out of the mount
1988 */
1989 jinit_done = 1;
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08001990 }
1991
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001992 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001993 SWARN(silent, s, "jmacd-9",
1994 "unable to reread meta blocks after journal init");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001995 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 }
1997
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001998 if (replay_only(s))
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001999 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002000
2001 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002002 SWARN(silent, s, "clm-7000",
2003 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002004 s->s_flags |= MS_RDONLY;
2005 }
2006 args.objectid = REISERFS_ROOT_OBJECTID;
2007 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
2008 root_inode =
2009 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002010 reiserfs_init_locked_inode, (void *)&args);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002011 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002012 SWARN(silent, s, "jmacd-10", "get root inode failed");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08002013 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002014 }
2015
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08002016 /*
2017 * This path assumed to be called with the BKL in the old times.
2018 * Now we have inherited the big reiserfs lock from it and many
2019 * reiserfs helpers called in the mount path and elsewhere require
2020 * this lock to be held even if it's not always necessary. Let's be
2021 * conservative and hold it early. The window can be reduced after
2022 * careful review of the code.
2023 */
2024 reiserfs_write_lock(s);
2025
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002026 if (root_inode->i_state & I_NEW) {
2027 reiserfs_read_locked_inode(root_inode, &args);
2028 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029 }
2030
Al Viro48fde702012-01-08 22:15:13 -05002031 s->s_root = d_make_root(root_inode);
2032 if (!s->s_root)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002033 goto error;
Jeff Mahoney098297b2014-04-23 10:00:36 -04002034 /* define and initialize hash function */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002035 sbi->s_hash_function = hash_function(s);
2036 if (sbi->s_hash_function == NULL) {
2037 dput(s->s_root);
2038 s->s_root = NULL;
2039 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002041
2042 if (is_reiserfs_3_5(rs)
2043 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002044 set_bit(REISERFS_3_5, &sbi->s_properties);
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07002045 else if (old_format)
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002046 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002047 else
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002048 set_bit(REISERFS_3_6, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002049
2050 if (!(s->s_flags & MS_RDONLY)) {
2051
2052 errval = journal_begin(&th, s, 1);
2053 if (errval) {
2054 dput(s->s_root);
2055 s->s_root = NULL;
2056 goto error;
2057 }
2058 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2059
2060 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2061 set_sb_fs_state(rs, 0);
2062
Jeff Mahoney098297b2014-04-23 10:00:36 -04002063 /*
2064 * Clear out s_bmap_nr if it would wrap. We can handle this
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002065 * case, but older revisions can't. This will cause the
2066 * file system to fail mount on those older implementations,
Jeff Mahoney098297b2014-04-23 10:00:36 -04002067 * avoiding corruption. -jeffm
2068 */
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002069 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2070 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002071 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002072 "claims to use %u bitmap blocks in "
2073 "its super block, but requires %u. "
2074 "Clearing to zero.", sb_bmap_nr(rs),
2075 reiserfs_bmap_count(s));
2076
2077 set_sb_bmap_nr(rs, 0);
2078 }
2079
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002080 if (old_format_only(s)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04002081 /*
2082 * filesystem of format 3.5 either with standard
2083 * or non-standard journal
2084 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002085 if (convert_reiserfs(s)) {
2086 /* and -o conv is given */
2087 if (!silent)
2088 reiserfs_info(s,
2089 "converting 3.5 filesystem to the 3.6 format");
2090
2091 if (is_reiserfs_3_5(rs))
Jeff Mahoney098297b2014-04-23 10:00:36 -04002092 /*
2093 * put magic string of 3.6 format.
2094 * 2.2 will not be able to
2095 * mount this filesystem anymore
2096 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002097 memcpy(rs->s_v1.s_magic,
2098 reiserfs_3_6_magic_string,
2099 sizeof
2100 (reiserfs_3_6_magic_string));
2101
2102 set_sb_version(rs, REISERFS_VERSION_2);
2103 reiserfs_convert_objectid_map_v1(s);
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002104 set_bit(REISERFS_3_6, &sbi->s_properties);
2105 clear_bit(REISERFS_3_5, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002106 } else if (!silent) {
2107 reiserfs_info(s, "using 3.5.x disk format\n");
2108 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04002109 } else
2110 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2111
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002112
Jeff Mahoney09f1b802014-04-23 10:00:39 -04002113 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Jeff Mahoney58d85422014-04-23 10:00:38 -04002114 errval = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002115 if (errval) {
2116 dput(s->s_root);
2117 s->s_root = NULL;
2118 goto error;
2119 }
2120
Jeff Mahoney4c051412013-08-08 17:27:19 -04002121 reiserfs_write_unlock(s);
Al Viroedcc37a2009-05-03 06:00:05 -04002122 if ((errval = reiserfs_lookup_privroot(s)) ||
2123 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002124 dput(s->s_root);
2125 s->s_root = NULL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04002126 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002127 }
Jeff Mahoney4c051412013-08-08 17:27:19 -04002128 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002129
Jeff Mahoney098297b2014-04-23 10:00:36 -04002130 /*
2131 * look for files which were to be removed in previous session
2132 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002133 finish_unfinished(s);
2134 } else {
2135 if (old_format_only(s) && !silent) {
2136 reiserfs_info(s, "using 3.5.x disk format\n");
2137 }
2138
Jeff Mahoney4c051412013-08-08 17:27:19 -04002139 reiserfs_write_unlock(s);
Al Viroedcc37a2009-05-03 06:00:05 -04002140 if ((errval = reiserfs_lookup_privroot(s)) ||
2141 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002142 dput(s->s_root);
2143 s->s_root = NULL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04002144 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002145 }
Jeff Mahoney4c051412013-08-08 17:27:19 -04002146 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002147 }
Jeff Mahoney098297b2014-04-23 10:00:36 -04002148 /*
2149 * mark hash in super block: it could be unset. overwrite should be ok
2150 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002151 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2152
2153 handle_attrs(s);
2154
2155 reiserfs_proc_info_init(s);
2156
2157 init_waitqueue_head(&(sbi->s_wait));
2158 spin_lock_init(&sbi->bitmap_lock);
2159
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02002160 reiserfs_write_unlock(s);
2161
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002162 return (0);
2163
Jan Kara00b44192008-07-25 01:46:38 -07002164error:
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04002165 reiserfs_write_unlock(s);
2166
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002167error_unlocked:
2168 /* kill the commit thread, free journal ram */
2169 if (jinit_done) {
2170 reiserfs_write_lock(s);
2171 journal_release_error(NULL, s);
2172 reiserfs_write_unlock(s);
2173 }
2174
Jiri Slabyfa0c5542014-12-12 16:29:29 +01002175 if (sbi->commit_wq)
2176 destroy_workqueue(sbi->commit_wq);
2177
Artem Bityutskiy033369d2012-06-01 17:18:08 +03002178 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
2179
Jeff Mahoney50652272006-09-30 23:28:44 -07002180 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002181 if (SB_BUFFER_WITH_SB(s))
2182 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07002184 {
2185 int j;
Jan Karaaca60612014-09-10 20:57:45 +02002186 for (j = 0; j < REISERFS_MAXQUOTAS; j++)
Jan Kara00b44192008-07-25 01:46:38 -07002187 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002188 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189#endif
James Lamanna833d3042005-10-30 15:00:16 -08002190 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002192 s->s_fs_info = NULL;
2193 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194}
2195
David Howells726c3342006-06-23 02:02:58 -07002196static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197{
David Howells726c3342006-06-23 02:02:58 -07002198 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002199
2200 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2201 buf->f_bfree = sb_free_blocks(rs);
2202 buf->f_bavail = buf->f_bfree;
2203 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07002204 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002205 /* changed to accommodate gcc folks. */
2206 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07002207 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2208 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2209 sizeof(rs->s_uuid)/2);
2210
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002211 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212}
2213
2214#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215static int reiserfs_write_dquot(struct dquot *dquot)
2216{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002217 struct reiserfs_transaction_handle th;
2218 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002219 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002221 reiserfs_write_lock(dquot->dq_sb);
2222 ret =
2223 journal_begin(&th, dquot->dq_sb,
2224 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2225 if (ret)
2226 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002227 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002228 ret = dquot_commit(dquot);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002229 reiserfs_write_lock_nested(dquot->dq_sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002230 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002231 if (!ret && err)
2232 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002233out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002234 reiserfs_write_unlock(dquot->dq_sb);
2235 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236}
2237
2238static int reiserfs_acquire_dquot(struct dquot *dquot)
2239{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002240 struct reiserfs_transaction_handle th;
2241 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002242 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002244 reiserfs_write_lock(dquot->dq_sb);
2245 ret =
2246 journal_begin(&th, dquot->dq_sb,
2247 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2248 if (ret)
2249 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002250 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002251 ret = dquot_acquire(dquot);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002252 reiserfs_write_lock_nested(dquot->dq_sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002253 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002254 if (!ret && err)
2255 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002256out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002257 reiserfs_write_unlock(dquot->dq_sb);
2258 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002259}
2260
2261static int reiserfs_release_dquot(struct dquot *dquot)
2262{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002263 struct reiserfs_transaction_handle th;
2264 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002266 reiserfs_write_lock(dquot->dq_sb);
2267 ret =
2268 journal_begin(&th, dquot->dq_sb,
2269 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara7af11682012-11-13 17:05:14 +01002270 reiserfs_write_unlock(dquot->dq_sb);
Jan Kara9c3013e2007-09-11 15:23:29 -07002271 if (ret) {
2272 /* Release dquot anyway to avoid endless cycle in dqput() */
2273 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002274 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07002275 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002276 ret = dquot_release(dquot);
Jan Kara7af11682012-11-13 17:05:14 +01002277 reiserfs_write_lock(dquot->dq_sb);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002278 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002279 if (!ret && err)
2280 ret = err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002281 reiserfs_write_unlock(dquot->dq_sb);
Jan Kara7af11682012-11-13 17:05:14 +01002282out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002283 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284}
2285
2286static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2287{
Jan Kara45065672008-07-25 01:46:37 -07002288 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002289 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2290 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2291 dquot_mark_dquot_dirty(dquot);
2292 return reiserfs_write_dquot(dquot);
2293 } else
2294 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295}
2296
2297static int reiserfs_write_info(struct super_block *sb, int type)
2298{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002299 struct reiserfs_transaction_handle th;
2300 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002301 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002303 /* Data block + inode block */
2304 reiserfs_write_lock(sb);
2305 ret = journal_begin(&th, sb, 2);
2306 if (ret)
2307 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002308 depth = reiserfs_write_unlock_nested(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002309 ret = dquot_commit_info(sb, type);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002310 reiserfs_write_lock_nested(sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002311 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002312 if (!ret && err)
2313 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002314out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002315 reiserfs_write_unlock(sb);
2316 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317}
2318
2319/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002320 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321 */
2322static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2323{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002324 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2325 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326}
2327
2328/*
2329 * Standard function to be called on quota_on
2330 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002331static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Jan Karaf00c9e42010-09-15 17:38:58 +02002332 struct path *path)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002334 int err;
Jan Karad5dee5c2008-04-28 02:16:23 -07002335 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002336 struct reiserfs_transaction_handle th;
Jan Karac3aa0772011-12-21 20:17:10 +01002337 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338
Jan Karab9e06ef2012-11-13 16:34:17 +01002339 reiserfs_write_lock(sb);
2340 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2341 err = -EINVAL;
2342 goto out;
2343 }
Christoph Hellwig307ae182010-05-19 07:16:43 -04002344
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002345 /* Quotafile not on the same filesystem? */
Al Virod8c95842011-12-07 18:16:57 -05002346 if (path->dentry->d_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002347 err = -EXDEV;
2348 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002349 }
David Howells2b0143b2015-03-17 22:25:59 +00002350 inode = d_inode(path->dentry);
Jeff Mahoney098297b2014-04-23 10:00:36 -04002351 /*
2352 * We must not pack tails for quota files on reiserfs for quota
2353 * IO to work
2354 */
Jan Karad5dee5c2008-04-28 02:16:23 -07002355 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2356 err = reiserfs_unpack(inode, NULL);
2357 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002358 reiserfs_warning(sb, "super-6520",
2359 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002360 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002361 err = -EINVAL;
2362 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002363 }
2364 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002365 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002366 /* Journaling quota? */
2367 if (REISERFS_SB(sb)->s_qf_names[type]) {
2368 /* Quotafile not of fs root? */
Jan Karaf00c9e42010-09-15 17:38:58 +02002369 if (path->dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002370 reiserfs_warning(sb, "super-6521",
2371 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002372 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002373 }
2374
2375 /*
2376 * When we journal data on quota file, we have to flush journal to see
2377 * all updates to the file when we bypass pagecache...
2378 */
2379 if (reiserfs_file_data_log(inode)) {
2380 /* Just start temporary transaction and finish it */
2381 err = journal_begin(&th, sb, 1);
2382 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002383 goto out;
Jeff Mahoney58d85422014-04-23 10:00:38 -04002384 err = journal_end_sync(&th);
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002385 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002386 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002387 }
Jan Karab9e06ef2012-11-13 16:34:17 +01002388 reiserfs_write_unlock(sb);
2389 return dquot_quota_on(sb, type, format_id, path);
Al Viro77e69da2008-08-01 04:29:18 -04002390out:
Jan Karab9e06ef2012-11-13 16:34:17 +01002391 reiserfs_write_unlock(sb);
Al Viro77e69da2008-08-01 04:29:18 -04002392 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393}
2394
Jeff Mahoney098297b2014-04-23 10:00:36 -04002395/*
2396 * Read data from quotafile - avoid pagecache and such because we cannot afford
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002398 * itself serializes the operations (and no one else should touch the files)
Jeff Mahoney098297b2014-04-23 10:00:36 -04002399 * we don't have to be afraid of races
2400 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002401static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2402 size_t len, loff_t off)
2403{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002404 struct inode *inode = sb_dqopt(sb)->files[type];
2405 unsigned long blk = off >> sb->s_blocksize_bits;
2406 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2407 size_t toread;
2408 struct buffer_head tmp_bh, *bh;
2409 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002411 if (off > i_size)
2412 return 0;
2413 if (off + len > i_size)
2414 len = i_size - off;
2415 toread = len;
2416 while (toread > 0) {
2417 tocopy =
2418 sb->s_blocksize - offset <
2419 toread ? sb->s_blocksize - offset : toread;
2420 tmp_bh.b_state = 0;
Jeff Mahoney098297b2014-04-23 10:00:36 -04002421 /*
2422 * Quota files are without tails so we can safely
2423 * use this function
2424 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002425 reiserfs_write_lock(sb);
2426 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2427 reiserfs_write_unlock(sb);
2428 if (err)
2429 return err;
2430 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2431 memset(data, 0, tocopy);
2432 else {
2433 bh = sb_bread(sb, tmp_bh.b_blocknr);
2434 if (!bh)
2435 return -EIO;
2436 memcpy(data, bh->b_data + offset, tocopy);
2437 brelse(bh);
2438 }
2439 offset = 0;
2440 toread -= tocopy;
2441 data += tocopy;
2442 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002444 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445}
2446
Jeff Mahoney098297b2014-04-23 10:00:36 -04002447/*
2448 * Write to quotafile (we know the transaction is already started and has
2449 * enough credits)
2450 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002451static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2452 const char *data, size_t len, loff_t off)
2453{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002454 struct inode *inode = sb_dqopt(sb)->files[type];
2455 unsigned long blk = off >> sb->s_blocksize_bits;
2456 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2457 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2458 size_t towrite = len;
2459 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002460
Jan Kara9c3013e2007-09-11 15:23:29 -07002461 if (!current->journal_info) {
Fabian Frederick53872ed2014-08-08 14:21:10 -07002462 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
Jan Kara9c3013e2007-09-11 15:23:29 -07002463 (unsigned long long)off, (unsigned long long)len);
2464 return -EIO;
2465 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002466 while (towrite > 0) {
2467 tocopy = sb->s_blocksize - offset < towrite ?
2468 sb->s_blocksize - offset : towrite;
2469 tmp_bh.b_state = 0;
Jan Kara361d94a2012-11-13 18:25:38 +01002470 reiserfs_write_lock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002471 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
Jan Kara361d94a2012-11-13 18:25:38 +01002472 reiserfs_write_unlock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002473 if (err)
2474 goto out;
2475 if (offset || tocopy != sb->s_blocksize)
2476 bh = sb_bread(sb, tmp_bh.b_blocknr);
2477 else
2478 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2479 if (!bh) {
2480 err = -EIO;
2481 goto out;
2482 }
2483 lock_buffer(bh);
2484 memcpy(bh->b_data + offset, data, tocopy);
2485 flush_dcache_page(bh->b_page);
2486 set_buffer_uptodate(bh);
2487 unlock_buffer(bh);
Jan Kara361d94a2012-11-13 18:25:38 +01002488 reiserfs_write_lock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002489 reiserfs_prepare_for_journal(sb, bh, 1);
Jeff Mahoney09f1b802014-04-23 10:00:39 -04002490 journal_mark_dirty(current->journal_info, bh);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002491 if (!journal_quota)
2492 reiserfs_add_ordered_list(inode, bh);
Jan Kara361d94a2012-11-13 18:25:38 +01002493 reiserfs_write_unlock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002494 brelse(bh);
2495 offset = 0;
2496 towrite -= tocopy;
2497 data += tocopy;
2498 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002500out:
Jan Kara67f16482012-04-25 21:28:12 +02002501 if (len == towrite)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002502 return err;
2503 if (inode->i_size < off + len - towrite)
2504 i_size_write(inode, off + len - towrite);
2505 inode->i_version++;
2506 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2507 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002508 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509}
2510
2511#endif
2512
Al Viro152a0832010-07-25 00:46:55 +04002513static struct dentry *get_super_block(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -07002514 int flags, const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04002515 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516{
Al Viro152a0832010-07-25 00:46:55 +04002517 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002518}
2519
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002520static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521{
2522 int ret;
2523
Jeff Mahoney797d9012014-04-23 10:00:34 -04002524 ret = init_inodecache();
2525 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002528 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002530 ret = register_filesystem(&reiserfs_fs_type);
Jeff Mahoney797d9012014-04-23 10:00:34 -04002531 if (ret)
2532 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533
Jeff Mahoney797d9012014-04-23 10:00:34 -04002534 return 0;
2535out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002536 reiserfs_proc_info_global_done();
2537 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002538
2539 return ret;
2540}
2541
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002542static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002543{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002544 reiserfs_proc_info_global_done();
2545 unregister_filesystem(&reiserfs_fs_type);
2546 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547}
2548
2549struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002550 .owner = THIS_MODULE,
2551 .name = "reiserfs",
Al Viro152a0832010-07-25 00:46:55 +04002552 .mount = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002553 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002554 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002555};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08002556MODULE_ALIAS_FS("reiserfs");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002557
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002558MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2559MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2560MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002562module_init(init_reiserfs_fs);
2563module_exit(exit_reiserfs_fs);