blob: d46e88a33b02451d2cffc955a64c6752fab7c2cd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
10 *
11 * NO WARRANTY
12 */
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/vmalloc.h>
17#include <linux/time.h>
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>
24#include <linux/buffer_head.h>
Christoph Hellwiga5694252007-07-17 04:04:28 -070025#include <linux/exportfs.h>
Jan Kara74abb982008-07-25 01:46:51 -070026#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/vfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/mount.h>
29#include <linux/namei.h>
Coly Li651d0622009-04-02 16:59:41 -070030#include <linux/crc32.h>
Jan Karac3aa0772011-12-21 20:17:10 +010031#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33struct file_system_type reiserfs_fs_type;
34
35static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
36static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
37static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
38
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070039int is_reiserfs_3_5(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070041 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
42 strlen(reiserfs_3_5_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070043}
44
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070045int is_reiserfs_3_6(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070047 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
48 strlen(reiserfs_3_6_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070049}
50
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070051int is_reiserfs_jr(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070053 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
54 strlen(reiserfs_jr_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070055}
56
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070057static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070059 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
60 is_reiserfs_jr(rs));
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
62
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070063static int reiserfs_remount(struct super_block *s, int *flags, char *data);
David Howells726c3342006-06-23 02:02:58 -070064static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070066static int reiserfs_sync_fs(struct super_block *s, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067{
Christoph Hellwig5af79262009-05-05 15:41:25 +020068 struct reiserfs_transaction_handle th;
69
Jan Karaa1177822012-07-03 16:45:29 +020070 /*
71 * Writeback quota in non-journalled quota case - journalled quota has
72 * no dirty dquots
73 */
74 dquot_writeback_dquots(s, -1);
Christoph Hellwig5af79262009-05-05 15:41:25 +020075 reiserfs_write_lock(s);
76 if (!journal_begin(&th, s, 1))
Jeff Mahoney58d85422014-04-23 10:00:38 -040077 if (!journal_end_sync(&th))
Christoph Hellwig5af79262009-05-05 15:41:25 +020078 reiserfs_flush_old_commits(s);
Christoph Hellwig5af79262009-05-05 15:41:25 +020079 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070080 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081}
82
Artem Bityutskiy033369d2012-06-01 17:18:08 +030083static void flush_old_commits(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
Artem Bityutskiy033369d2012-06-01 17:18:08 +030085 struct reiserfs_sb_info *sbi;
86 struct super_block *s;
87
88 sbi = container_of(work, struct reiserfs_sb_info, old_work.work);
89 s = sbi->s_journal->j_work_sb;
90
91 spin_lock(&sbi->old_work_lock);
92 sbi->work_queued = 0;
93 spin_unlock(&sbi->old_work_lock);
94
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070095 reiserfs_sync_fs(s, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
Artem Bityutskiy033369d2012-06-01 17:18:08 +030098void reiserfs_schedule_old_flush(struct super_block *s)
99{
100 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
101 unsigned long delay;
102
Jan Kara01777832014-08-06 19:43:56 +0200103 /*
104 * Avoid scheduling flush when sb is being shut down. It can race
105 * with journal shutdown and free still queued delayed work.
106 */
107 if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE))
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300108 return;
109
110 spin_lock(&sbi->old_work_lock);
111 if (!sbi->work_queued) {
112 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
113 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
114 sbi->work_queued = 1;
115 }
116 spin_unlock(&sbi->old_work_lock);
117}
118
119static void cancel_old_flush(struct super_block *s)
120{
121 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
122
123 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
124 spin_lock(&sbi->old_work_lock);
125 sbi->work_queued = 0;
126 spin_unlock(&sbi->old_work_lock);
127}
128
Takashi Satoc4be0c12009-01-09 16:40:58 -0800129static int reiserfs_freeze(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700131 struct reiserfs_transaction_handle th;
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300132
133 cancel_old_flush(s);
134
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700135 reiserfs_write_lock(s);
136 if (!(s->s_flags & MS_RDONLY)) {
137 int err = journal_begin(&th, s, 1);
138 if (err) {
139 reiserfs_block_writes(&th);
140 } else {
141 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
142 1);
Jeff Mahoney09f1b802014-04-23 10:00:39 -0400143 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700144 reiserfs_block_writes(&th);
Jeff Mahoney58d85422014-04-23 10:00:38 -0400145 journal_end_sync(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700146 }
147 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700148 reiserfs_write_unlock(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800149 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150}
151
Takashi Satoc4be0c12009-01-09 16:40:58 -0800152static int reiserfs_unfreeze(struct super_block *s)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700153{
154 reiserfs_allow_writes(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800155 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156}
157
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700158extern const struct in_core_key MAX_IN_CORE_KEY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
Jeff Mahoney098297b2014-04-23 10:00:36 -0400160/*
161 * this is used to delete "save link" when there are no items of a
162 * file it points to. It can either happen if unlink is completed but
163 * "save unlink" removal, or if file has both unlink and truncate
164 * pending and as unlink completes first (because key of "save link"
165 * protecting unlink is bigger that a key lf "save link" which
166 * protects truncate), so there left no items to make truncate
167 * completion on
168 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700169static int remove_save_link_only(struct super_block *s,
170 struct reiserfs_key *key, int oid_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700172 struct reiserfs_transaction_handle th;
173 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700175 /* we are going to do one balancing */
176 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
177 if (err)
178 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700180 reiserfs_delete_solid_item(&th, NULL, key);
181 if (oid_free)
182 /* removals are protected by direct items */
183 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
184
Jeff Mahoney58d85422014-04-23 10:00:38 -0400185 return journal_end(&th);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188#ifdef CONFIG_QUOTA
189static int reiserfs_quota_on_mount(struct super_block *, int);
190#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700191
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192/* look for uncompleted unlinks and truncates and complete them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700193static int finish_unfinished(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700195 INITIALIZE_PATH(path);
196 struct cpu_key max_cpu_key, obj_key;
Lepton Wufb46f342007-10-16 23:30:04 -0700197 struct reiserfs_key save_link_key, last_inode_key;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700198 int retval = 0;
199 struct item_head *ih;
200 struct buffer_head *bh;
201 int item_pos;
202 char *item;
203 int done;
204 struct inode *inode;
205 int truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700207 int i;
208 int ms_active_set;
Jan Karaf4b113a2010-05-21 19:12:51 +0200209 int quota_enabled[MAXQUOTAS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700211
212 /* compose key to look for "save" links */
213 max_cpu_key.version = KEY_FORMAT_3_5;
214 max_cpu_key.on_disk_key.k_dir_id = ~0U;
215 max_cpu_key.on_disk_key.k_objectid = ~0U;
216 set_cpu_key_k_offset(&max_cpu_key, ~0U);
217 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Lepton Wufb46f342007-10-16 23:30:04 -0700219 memset(&last_inode_key, 0, sizeof(last_inode_key));
220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700222 /* Needed for iput() to work correctly and not trash data */
223 if (s->s_flags & MS_ACTIVE) {
224 ms_active_set = 0;
225 } else {
226 ms_active_set = 1;
227 s->s_flags |= MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700229 /* Turn on quotas so that they are updated correctly */
230 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200231 quota_enabled[i] = 1;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700232 if (REISERFS_SB(s)->s_qf_names[i]) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200233 int ret;
234
235 if (sb_has_quota_active(s, i)) {
236 quota_enabled[i] = 0;
237 continue;
238 }
239 ret = reiserfs_quota_on_mount(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700240 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400241 reiserfs_warning(s, "reiserfs-2500",
242 "cannot turn on journaled "
243 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700244 }
245 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700248 done = 0;
249 REISERFS_SB(s)->s_is_unlinked_ok = 1;
250 while (!retval) {
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400251 int depth;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700252 retval = search_item(s, &max_cpu_key, &path);
253 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400254 reiserfs_error(s, "vs-2140",
255 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700256 break;
257 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700259 bh = get_last_bh(&path);
260 item_pos = get_item_pos(&path);
261 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400262 reiserfs_warning(s, "vs-2060",
263 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700264 break;
265 }
266 item_pos--;
Jeff Mahoney4cf5f7a2014-04-23 10:00:35 -0400267 ih = item_head(bh, item_pos);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700268
269 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
270 /* there are no "save" links anymore */
271 break;
272
273 save_link_key = ih->ih_key;
274 if (is_indirect_le_ih(ih))
275 truncate = 1;
276 else
277 truncate = 0;
278
279 /* reiserfs_iget needs k_dirid and k_objectid only */
Jeff Mahoney4cf5f7a2014-04-23 10:00:35 -0400280 item = ih_item_body(bh, ih);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700281 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
282 obj_key.on_disk_key.k_objectid =
283 le32_to_cpu(ih->ih_key.k_objectid);
284 obj_key.on_disk_key.k_offset = 0;
285 obj_key.on_disk_key.k_type = 0;
286
287 pathrelse(&path);
288
289 inode = reiserfs_iget(s, &obj_key);
290 if (!inode) {
Jeff Mahoney098297b2014-04-23 10:00:36 -0400291 /*
292 * the unlink almost completed, it just did not
293 * manage to remove "save" link and release objectid
294 */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400295 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700296 &obj_key);
297 retval = remove_save_link_only(s, &save_link_key, 1);
298 continue;
299 }
300
301 if (!truncate && inode->i_nlink) {
302 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400303 reiserfs_warning(s, "vs-2185",
304 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700305 &obj_key);
306 retval = remove_save_link_only(s, &save_link_key, 0);
307 continue;
308 }
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400309 depth = reiserfs_write_unlock_nested(inode->i_sb);
Christoph Hellwig871a2932010-03-03 09:05:07 -0500310 dquot_initialize(inode);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400311 reiserfs_write_lock_nested(inode->i_sb, depth);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700312
313 if (truncate && S_ISDIR(inode->i_mode)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -0400314 /*
315 * We got a truncate request for a dir which
316 * is impossible. The only imaginable way is to
317 * execute unfinished truncate request then boot
318 * into old kernel, remove the file and create dir
319 * with the same key.
320 */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400321 reiserfs_warning(s, "green-2101",
322 "impossible truncate on a "
323 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700324 INODE_PKEY(inode));
325 retval = remove_save_link_only(s, &save_link_key, 0);
326 truncate = 0;
327 iput(inode);
328 continue;
329 }
330
331 if (truncate) {
332 REISERFS_I(inode)->i_flags |=
333 i_link_saved_truncate_mask;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400334 /*
335 * not completed truncate found. New size was
336 * committed together with "save" link
337 */
Fabian Frederick53872ed2014-08-08 14:21:10 -0700338 reiserfs_info(s, "Truncating %k to %lld ..",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700339 INODE_PKEY(inode), inode->i_size);
Jeff Mahoney098297b2014-04-23 10:00:36 -0400340
341 /* don't update modification time */
342 reiserfs_truncate_file(inode, 0);
343
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700344 retval = remove_save_link(inode, truncate);
345 } else {
346 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
347 /* not completed unlink (rmdir) found */
348 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700349 if (memcmp(&last_inode_key, INODE_PKEY(inode),
350 sizeof(last_inode_key))){
351 last_inode_key = *INODE_PKEY(inode);
352 /* removal gets completed in iput */
353 retval = 0;
354 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400355 reiserfs_warning(s, "super-2189", "Dead loop "
356 "in finish_unfinished "
357 "detected, just remove "
358 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700359 retval = remove_save_link_only(s,
360 &save_link_key, 0);
361 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700362 }
363
364 iput(inode);
365 printk("done\n");
366 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700368 REISERFS_SB(s)->s_is_unlinked_ok = 0;
369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700371 /* Turn quotas off */
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400372 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700373 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200374 if (sb_dqopt(s)->files[i] && quota_enabled[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400375 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700376 }
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400377 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700378 if (ms_active_set)
379 /* Restore the flag back */
380 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700382 pathrelse(&path);
383 if (done)
384 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
385 "Completed\n", done);
386 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700388
Jeff Mahoney098297b2014-04-23 10:00:36 -0400389/*
390 * to protect file being unlinked from getting lost we "safe" link files
391 * being unlinked. This link will be deleted in the same transaction with last
392 * item of file. mounting the filesystem we scan all these links and remove
393 * files which almost got lost
394 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700395void add_save_link(struct reiserfs_transaction_handle *th,
396 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700398 INITIALIZE_PATH(path);
399 int retval;
400 struct cpu_key key;
401 struct item_head ih;
402 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700404 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700406 /* file can only get one "save link" of each kind */
407 RFALSE(truncate &&
408 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
409 "saved link already exists for truncated inode %lx",
410 (long)inode->i_ino);
411 RFALSE(!truncate &&
412 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
413 "saved link already exists for unlinked inode %lx",
414 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700416 /* setup key of "save" link */
417 key.version = KEY_FORMAT_3_5;
418 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
419 key.on_disk_key.k_objectid = inode->i_ino;
420 if (!truncate) {
421 /* unlink, rmdir, rename */
422 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
423 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700425 /* item head of "safe" link */
426 make_le_item_head(&ih, &key, key.version,
427 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
428 4 /*length */ , 0xffff /*free space */ );
429 } else {
430 /* truncate */
431 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400432 reiserfs_warning(inode->i_sb, "green-2102",
433 "Adding a truncate savelink for "
434 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700435 INODE_PKEY(inode));
436 set_cpu_key_k_offset(&key, 1);
437 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700439 /* item head of "safe" link */
440 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
441 4 /*length */ , 0 /*free space */ );
442 }
443 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700445 /* look for its place in the tree */
446 retval = search_item(inode->i_sb, &key, &path);
447 if (retval != ITEM_NOT_FOUND) {
448 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400449 reiserfs_error(inode->i_sb, "vs-2100",
450 "search_by_key (%K) returned %d", &key,
451 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700452 pathrelse(&path);
453 return;
454 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700456 /* body of "save" link */
457 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300459 /* put "save" link into tree, don't charge quota to anyone */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700460 retval =
461 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
462 if (retval) {
463 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400464 reiserfs_error(inode->i_sb, "vs-2120",
465 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700466 } else {
467 if (truncate)
468 REISERFS_I(inode)->i_flags |=
469 i_link_saved_truncate_mask;
470 else
471 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
472 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473}
474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700476int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700478 struct reiserfs_transaction_handle th;
479 struct reiserfs_key key;
480 int err;
481
482 /* we are going to do one balancing only */
483 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
484 if (err)
485 return err;
486
487 /* setup key of "save" link */
488 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
489 key.k_objectid = INODE_PKEY(inode)->k_objectid;
490 if (!truncate) {
491 /* unlink, rmdir, rename */
492 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
493 1 + inode->i_sb->s_blocksize);
494 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
495 } else {
496 /* truncate */
497 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
498 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
499 }
500
501 if ((truncate &&
502 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
503 (!truncate &&
504 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
505 /* don't take quota bytes from anywhere */
506 reiserfs_delete_solid_item(&th, NULL, &key);
507 if (!truncate) {
508 reiserfs_release_objectid(&th, inode->i_ino);
509 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
510 } else
511 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
512
Jeff Mahoney58d85422014-04-23 10:00:38 -0400513 return journal_end(&th);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514}
515
David Howellsedc666e2006-10-11 01:22:14 -0700516static void reiserfs_kill_sb(struct super_block *s)
517{
518 if (REISERFS_SB(s)) {
Al Viro672fe152013-08-05 17:37:37 +0400519 reiserfs_proc_info_done(s);
Jeff Mahoneya9e36da2011-12-21 21:18:43 +0100520 /*
521 * Force any pending inode evictions to occur now. Any
522 * inodes to be removed that have extended attributes
523 * associated with them need to clean them up before
524 * we can release the extended attribute root dentries.
525 * shrink_dcache_for_umount will BUG if we don't release
526 * those before it's called so ->put_super is too late.
527 */
528 shrink_dcache_sb(s);
529
530 dput(REISERFS_SB(s)->xattr_root);
531 REISERFS_SB(s)->xattr_root = NULL;
532 dput(REISERFS_SB(s)->priv_root);
533 REISERFS_SB(s)->priv_root = NULL;
David Howellsedc666e2006-10-11 01:22:14 -0700534 }
535
536 kill_block_super(s);
537}
538
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700539static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700541 struct reiserfs_transaction_handle th;
542 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400544 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
545
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200546 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200547
Jeff Mahoney098297b2014-04-23 10:00:36 -0400548 /*
549 * change file system state to current state if it was mounted
550 * with read-write permissions
551 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700552 if (!(s->s_flags & MS_RDONLY)) {
553 if (!journal_begin(&th, s, 10)) {
554 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
555 1);
556 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
557 REISERFS_SB(s)->s_mount_state);
Jeff Mahoney09f1b802014-04-23 10:00:39 -0400558 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700559 }
560 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
Jeff Mahoney098297b2014-04-23 10:00:36 -0400562 /*
563 * note, journal_release checks for readonly mount, and can
564 * decide not to do a journal_end
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700565 */
566 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
Jeff Mahoney50652272006-09-30 23:28:44 -0700568 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700570 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700572 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700574 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400575 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700576 REISERFS_SB(s)->reserved_blocks);
577 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200579 reiserfs_write_unlock(s);
580 mutex_destroy(&REISERFS_SB(s)->lock);
Jeff Mahoney797d9012014-04-23 10:00:34 -0400581 destroy_workqueue(REISERFS_SB(s)->commit_wq);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700582 kfree(s->s_fs_info);
583 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584}
585
Christoph Lametere18b8902006-12-06 20:33:20 -0800586static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
588static struct inode *reiserfs_alloc_inode(struct super_block *sb)
589{
590 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700591 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800592 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 return &ei->vfs_inode;
598}
599
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100600static void reiserfs_i_callback(struct rcu_head *head)
601{
602 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100603 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
604}
605
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606static void reiserfs_destroy_inode(struct inode *inode)
607{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100608 call_rcu(&inode->i_rcu, reiserfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609}
610
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700611static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700613 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
Christoph Lametera35afb82007-05-16 22:10:57 -0700615 INIT_LIST_HEAD(&ei->i_prealloc_list);
616 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700618
Fabian Frederick31e14362014-04-03 14:50:37 -0700619static int __init init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
621 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700622 sizeof(struct
623 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800624 0, (SLAB_RECLAIM_ACCOUNT|
625 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900626 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 if (reiserfs_inode_cachep == NULL)
628 return -ENOMEM;
629 return 0;
630}
631
632static void destroy_inodecache(void)
633{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000634 /*
635 * Make sure all delayed rcu free inodes are flushed before we
636 * destroy cache.
637 */
638 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700639 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640}
641
642/* we don't mark inodes dirty, we just log them */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400643static void reiserfs_dirty_inode(struct inode *inode, int flags)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700644{
645 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700647 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200648
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700649 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400650 reiserfs_warning(inode->i_sb, "clm-6006",
651 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700652 inode->i_ino);
653 return;
654 }
Jeff Mahoney278f6672013-08-08 17:34:46 -0400655 reiserfs_write_lock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
Jeff Mahoney098297b2014-04-23 10:00:36 -0400657 /*
658 * this is really only used for atime updates, so they don't have
659 * to be included in O_SYNC or fsync
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700660 */
661 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200662 if (err)
663 goto out;
664
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700665 reiserfs_update_sd(&th, inode);
Jeff Mahoney58d85422014-04-23 10:00:38 -0400666 journal_end(&th);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200667
668out:
Jeff Mahoney278f6672013-08-08 17:34:46 -0400669 reiserfs_write_unlock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670}
671
Jan Karac3aa0772011-12-21 20:17:10 +0100672static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
673{
674 struct super_block *s = root->d_sb;
675 struct reiserfs_journal *journal = SB_JOURNAL(s);
676 long opts = REISERFS_SB(s)->s_mount_opt;
677
678 if (opts & (1 << REISERFS_LARGETAIL))
679 seq_puts(seq, ",tails=on");
680 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
681 seq_puts(seq, ",notail");
682 /* tails=small is default so we don't show it */
683
684 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
685 seq_puts(seq, ",barrier=none");
686 /* barrier=flush is default so we don't show it */
687
688 if (opts & (1 << REISERFS_ERROR_CONTINUE))
689 seq_puts(seq, ",errors=continue");
690 else if (opts & (1 << REISERFS_ERROR_PANIC))
691 seq_puts(seq, ",errors=panic");
692 /* errors=ro is default so we don't show it */
693
694 if (opts & (1 << REISERFS_DATA_LOG))
695 seq_puts(seq, ",data=journal");
696 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
697 seq_puts(seq, ",data=writeback");
698 /* data=ordered is default so we don't show it */
699
700 if (opts & (1 << REISERFS_ATTRS))
701 seq_puts(seq, ",attrs");
702
703 if (opts & (1 << REISERFS_XATTRS_USER))
704 seq_puts(seq, ",user_xattr");
705
706 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
707 seq_puts(seq, ",expose_privroot");
708
709 if (opts & (1 << REISERFS_POSIXACL))
710 seq_puts(seq, ",acl");
711
712 if (REISERFS_SB(s)->s_jdev)
713 seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
714
715 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
716 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
717
718#ifdef CONFIG_QUOTA
719 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
720 seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
721 else if (opts & (1 << REISERFS_USRQUOTA))
722 seq_puts(seq, ",usrquota");
723 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
724 seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
725 else if (opts & (1 << REISERFS_GRPQUOTA))
726 seq_puts(seq, ",grpquota");
727 if (REISERFS_SB(s)->s_jquota_fmt) {
728 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
729 seq_puts(seq, ",jqfmt=vfsold");
730 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
731 seq_puts(seq, ",jqfmt=vfsv0");
732 }
733#endif
734
735 /* Block allocator options */
736 if (opts & (1 << REISERFS_NO_BORDER))
737 seq_puts(seq, ",block-allocator=noborder");
738 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
739 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
740 if (opts & (1 << REISERFS_HASHED_RELOCATION))
741 seq_puts(seq, ",block-allocator=hashed_relocation");
742 if (opts & (1 << REISERFS_TEST4))
743 seq_puts(seq, ",block-allocator=test4");
744 show_alloc_options(seq, s);
745 return 0;
746}
747
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700749static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
750 size_t, loff_t);
751static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
752 loff_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753#endif
754
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800755static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700756 .alloc_inode = reiserfs_alloc_inode,
757 .destroy_inode = reiserfs_destroy_inode,
758 .write_inode = reiserfs_write_inode,
759 .dirty_inode = reiserfs_dirty_inode,
Al Viro845a2cc2010-06-07 11:37:37 -0400760 .evict_inode = reiserfs_evict_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700761 .put_super = reiserfs_put_super,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700762 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800763 .freeze_fs = reiserfs_freeze,
764 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700765 .statfs = reiserfs_statfs,
766 .remount_fs = reiserfs_remount,
Jan Karac3aa0772011-12-21 20:17:10 +0100767 .show_options = reiserfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700769 .quota_read = reiserfs_quota_read,
770 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771#endif
772};
773
774#ifdef CONFIG_QUOTA
775#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
776
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777static int reiserfs_write_dquot(struct dquot *);
778static int reiserfs_acquire_dquot(struct dquot *);
779static int reiserfs_release_dquot(struct dquot *);
780static int reiserfs_mark_dquot_dirty(struct dquot *);
781static int reiserfs_write_info(struct super_block *, int);
Jan Karaf00c9e42010-09-15 17:38:58 +0200782static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700784static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700785 .write_dquot = reiserfs_write_dquot,
786 .acquire_dquot = reiserfs_acquire_dquot,
787 .release_dquot = reiserfs_release_dquot,
788 .mark_dirty = reiserfs_mark_dquot_dirty,
789 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100790 .alloc_dquot = dquot_alloc,
791 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792};
793
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700794static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700795 .quota_on = reiserfs_quota_on,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400796 .quota_off = dquot_quota_off,
797 .quota_sync = dquot_quota_sync,
798 .get_info = dquot_get_dqinfo,
799 .set_info = dquot_set_dqinfo,
800 .get_dqblk = dquot_get_dqblk,
801 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802};
803#endif
804
Christoph Hellwig39655162007-10-21 16:42:17 -0700805static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700806 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700807 .fh_to_dentry = reiserfs_fh_to_dentry,
808 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700809 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700810};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
Jeff Mahoney098297b2014-04-23 10:00:36 -0400812/*
813 * this struct is used in reiserfs_getopt () for containing the value for
814 * those mount options that have values rather than being toggles.
815 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700817 char *value;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400818 /*
819 * bitmask which is to set on mount_options bitmask
820 * when this value is found, 0 is no bits are to be changed.
821 */
822 int setmask;
823 /*
824 * bitmask which is to clear on mount_options bitmask
825 * when this value is found, 0 is no bits are to be changed.
826 * This is applied BEFORE setmask
827 */
828 int clrmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829} arg_desc_t;
830
831/* Set this bit in arg_required to allow empty arguments */
832#define REISERFS_OPT_ALLOWEMPTY 31
833
Jeff Mahoney098297b2014-04-23 10:00:36 -0400834/*
835 * this struct is used in reiserfs_getopt() for describing the
836 * set of reiserfs mount options
837 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700839 char *option_name;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400840
841 /* 0 if argument is not required, not 0 otherwise */
842 int arg_required;
843
844 /* list of values accepted by an option */
845 const arg_desc_t *values;
846
847 /*
848 * bitmask which is to set on mount_options bitmask
849 * when this value is found, 0 is no bits are to be changed.
850 */
851 int setmask;
852
853 /*
854 * bitmask which is to clear on mount_options bitmask
855 * when this value is found, 0 is no bits are to be changed.
856 * This is applied BEFORE setmask
857 */
858 int clrmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859} opt_desc_t;
860
861/* possible values for -o data= */
862static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700863 {"ordered", 1 << REISERFS_DATA_ORDERED,
864 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
865 {"journal", 1 << REISERFS_DATA_LOG,
866 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
867 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
868 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800869 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870};
871
872/* possible values for -o barrier= */
873static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700874 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
875 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800876 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877};
878
Jeff Mahoney098297b2014-04-23 10:00:36 -0400879/*
880 * possible values for "-o block-allocator=" and bits which are to be set in
881 * s_mount_opt of reiserfs specific part of in-core super block
882 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700884 {"noborder", 1 << REISERFS_NO_BORDER, 0},
885 {"border", 0, 1 << REISERFS_NO_BORDER},
886 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
887 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
888 {"test4", 1 << REISERFS_TEST4, 0},
889 {"notest4", 0, 1 << REISERFS_TEST4},
890 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891};
892
893static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700894 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
895 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
896 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
897 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898};
899
900static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700901 {"panic", 1 << REISERFS_ERROR_PANIC,
902 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
903 {"ro-remount", 1 << REISERFS_ERROR_RO,
904 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700906 {"continue", 1 << REISERFS_ERROR_CONTINUE,
907 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700909 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910};
911
Jeff Mahoney098297b2014-04-23 10:00:36 -0400912/*
913 * proceed only one option from a list *cur - string containing of mount
914 * options
915 * opts - array of options which are accepted
916 * opt_arg - if option is found and requires an argument and if it is specifed
917 * in the input - pointer to the argument is stored here
918 * bit_flags - if option requires to set a certain bit - it is set here
919 * return -1 if unknown option is found, opt->arg_required otherwise
920 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700921static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
922 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700924 char *p;
Jeff Mahoney098297b2014-04-23 10:00:36 -0400925 /*
926 * foo=bar,
927 * ^ ^ ^
928 * | | +-- option_end
929 * | +-- arg_start
930 * +-- option_start
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700931 */
932 const opt_desc_t *opt;
933 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700935 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700937 /* assume argument cannot contain commas */
938 *cur = strchr(p, ',');
939 if (*cur) {
940 *(*cur) = '\0';
941 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700944 if (!strncmp(p, "alloc=", 6)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -0400945 /*
946 * Ugly special case, probably we should redo options
947 * parser so that it can understand several arguments for
948 * some options, also so that it can fill several bitfields
949 * with option values.
950 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700951 if (reiserfs_parse_alloc_options(s, p + 6)) {
952 return -1;
953 } else {
954 return 0;
955 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700957
958 /* for every option in the list */
959 for (opt = opts; opt->option_name; opt++) {
960 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
961 if (bit_flags) {
962 if (opt->clrmask ==
963 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400964 reiserfs_warning(s, "super-6500",
965 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700966 p);
967 else
968 *bit_flags &= ~opt->clrmask;
969 if (opt->setmask ==
970 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400971 reiserfs_warning(s, "super-6501",
972 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700973 p);
974 else
975 *bit_flags |= opt->setmask;
976 }
977 break;
978 }
979 }
980 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400981 reiserfs_warning(s, "super-6502",
982 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700983 return -1;
984 }
985
986 p += strlen(opt->option_name);
987 switch (*p) {
988 case '=':
989 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400990 reiserfs_warning(s, "super-6503",
991 "the option \"%s\" does not "
992 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700993 opt->option_name);
994 return -1;
995 }
996 break;
997
998 case 0:
999 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001000 reiserfs_warning(s, "super-6504",
1001 "the option \"%s\" requires an "
1002 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001003 return -1;
1004 }
1005 break;
1006 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001007 reiserfs_warning(s, "super-6505",
1008 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001009 opt->option_name);
1010 return -1;
1011 }
1012
Jeff Mahoney098297b2014-04-23 10:00:36 -04001013 /*
1014 * move to the argument, or to next option if argument is not
1015 * required
1016 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001017 p++;
1018
1019 if (opt->arg_required
1020 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1021 && !strlen(p)) {
1022 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001023 reiserfs_warning(s, "super-6506",
1024 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001025 opt->option_name);
1026 return -1;
1027 }
1028
1029 if (!opt->values) {
1030 /* *=NULLopt_arg contains pointer to argument */
1031 *opt_arg = p;
1032 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1033 }
1034
1035 /* values possible for this option are listed in opt->values */
1036 for (arg = opt->values; arg->value; arg++) {
1037 if (!strcmp(p, arg->value)) {
1038 if (bit_flags) {
1039 *bit_flags &= ~arg->clrmask;
1040 *bit_flags |= arg->setmask;
1041 }
1042 return opt->arg_required;
1043 }
1044 }
1045
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001046 reiserfs_warning(s, "super-6506",
1047 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001048 opt->option_name);
1049 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050}
1051
1052/* returns 0 if something is wrong in option string, 1 - otherwise */
Jeff Mahoney098297b2014-04-23 10:00:36 -04001053static int reiserfs_parse_options(struct super_block *s,
1054
1055 /* string given via mount's -o */
1056 char *options,
1057
1058 /*
1059 * after the parsing phase, contains the
1060 * collection of bitflags defining what
1061 * mount options were selected.
1062 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001063 unsigned long *mount_options,
Jeff Mahoney098297b2014-04-23 10:00:36 -04001064
1065 /* strtol-ed from NNN of resize=NNN */
1066 unsigned long *blocks,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001067 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001068 unsigned int *commit_max_age,
1069 char **qf_names,
1070 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001072 int c;
1073 char *arg = NULL;
1074 char *pos;
1075 opt_desc_t opts[] = {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001076 /*
1077 * Compatibility stuff, so that -o notail for old
1078 * setups still work
1079 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001080 {"tails",.arg_required = 't',.values = tails},
1081 {"notail",.clrmask =
1082 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1083 {"conv",.setmask = 1 << REISERFS_CONVERT},
1084 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1085 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -04001086 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001088 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1089 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001091 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1092 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093#endif
1094#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001095 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1096 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001098 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1099 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001101 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001102 {"replayonly",.setmask = 1 << REPLAYONLY},
1103 {"block-allocator",.arg_required = 'a',.values = balloc},
1104 {"data",.arg_required = 'd',.values = logging_mode},
1105 {"barrier",.arg_required = 'b',.values = barrier_mode},
1106 {"resize",.arg_required = 'r',.values = NULL},
1107 {"jdev",.arg_required = 'j',.values = NULL},
1108 {"nolargeio",.arg_required = 'w',.values = NULL},
1109 {"commit",.arg_required = 'c',.values = NULL},
Jan Karac3aa0772011-12-21 20:17:10 +01001110 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1111 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1112 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001113 {"errors",.arg_required = 'e',.values = error_actions},
1114 {"usrjquota",.arg_required =
1115 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1116 {"grpjquota",.arg_required =
1117 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1118 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001119 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001120 };
1121
1122 *blocks = 0;
1123 if (!options || !*options)
Jeff Mahoney098297b2014-04-23 10:00:36 -04001124 /*
1125 * use default configuration: create tails, journaling on, no
1126 * conversion to newest format
1127 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001128 return 1;
1129
1130 for (pos = options; pos;) {
1131 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1132 if (c == -1)
1133 /* wrong option is given */
1134 return 0;
1135
1136 if (c == 'r') {
1137 char *p;
1138
1139 p = NULL;
1140 /* "resize=NNN" or "resize=auto" */
1141
1142 if (!strcmp(arg, "auto")) {
1143 /* From JFS code, to auto-get the size. */
1144 *blocks =
1145 s->s_bdev->bd_inode->i_size >> s->
1146 s_blocksize_bits;
1147 } else {
1148 *blocks = simple_strtoul(arg, &p, 0);
1149 if (*p != '\0') {
1150 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001151 reiserfs_warning(s, "super-6507",
1152 "bad value %s for "
1153 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001154 return 0;
1155 }
1156 }
1157 }
1158
1159 if (c == 'c') {
1160 char *p = NULL;
1161 unsigned long val = simple_strtoul(arg, &p, 0);
1162 /* commit=NNN (time in seconds) */
1163 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001164 reiserfs_warning(s, "super-6508",
1165 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001166 arg);
1167 return 0;
1168 }
1169 *commit_max_age = (unsigned int)val;
1170 }
1171
1172 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001173 reiserfs_warning(s, "super-6509", "nolargeio option "
1174 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -07001175 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001176 }
1177
1178 if (c == 'j') {
1179 if (arg && *arg && jdev_name) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001180 /* Hm, already assigned? */
1181 if (*jdev_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001182 reiserfs_warning(s, "super-6510",
1183 "journal device was "
1184 "already specified to "
1185 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001186 return 0;
1187 }
1188 *jdev_name = arg;
1189 }
1190 }
1191#ifdef CONFIG_QUOTA
1192 if (c == 'u' || c == 'g') {
1193 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1194
Jan Kara6929f892008-08-20 18:16:36 +02001195 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001196 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001197 reiserfs_warning(s, "super-6511",
1198 "cannot change journaled "
1199 "quota options when quota "
1200 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001201 return 0;
1202 }
1203 if (*arg) { /* Some filename specified? */
1204 if (REISERFS_SB(s)->s_qf_names[qtype]
1205 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1206 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001207 reiserfs_warning(s, "super-6512",
1208 "%s quota file "
1209 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001210 QTYPE2NAME(qtype));
1211 return 0;
1212 }
1213 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001214 reiserfs_warning(s, "super-6513",
1215 "quotafile must be "
1216 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001217 return 0;
1218 }
Ionut-Gabriel Raduaf591ad2013-03-10 15:06:23 +02001219 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001220 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001221 reiserfs_warning(s, "reiserfs-2502",
1222 "not enough memory "
1223 "for storing "
1224 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001225 return 0;
1226 }
Jan Karac3aa0772011-12-21 20:17:10 +01001227 if (qtype == USRQUOTA)
1228 *mount_options |= 1 << REISERFS_USRQUOTA;
1229 else
1230 *mount_options |= 1 << REISERFS_GRPQUOTA;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001231 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001232 if (qf_names[qtype] !=
1233 REISERFS_SB(s)->s_qf_names[qtype])
1234 kfree(qf_names[qtype]);
1235 qf_names[qtype] = NULL;
Jan Karac3aa0772011-12-21 20:17:10 +01001236 if (qtype == USRQUOTA)
1237 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1238 else
1239 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001240 }
1241 }
1242 if (c == 'f') {
1243 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001244 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001245 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001246 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001247 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001248 reiserfs_warning(s, "super-6514",
1249 "unknown quota format "
1250 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001251 return 0;
1252 }
Jan Kara6929f892008-08-20 18:16:36 +02001253 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001254 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001255 reiserfs_warning(s, "super-6515",
1256 "cannot change journaled "
1257 "quota options when quota "
1258 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001259 return 0;
1260 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001261 }
1262#else
1263 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001264 reiserfs_warning(s, "reiserfs-2503", "journaled "
1265 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001266 return 0;
1267 }
1268#endif
1269 }
1270
1271#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001272 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1273 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001274 reiserfs_warning(s, "super-6515",
1275 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001276 return 0;
1277 }
Jan Karac3aa0772011-12-21 20:17:10 +01001278 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1279 sb_has_quota_loaded(s, USRQUOTA)) ||
1280 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1281 sb_has_quota_loaded(s, GRPQUOTA))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001282 reiserfs_warning(s, "super-6516", "quota options must "
1283 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001284 return 0;
1285 }
1286#endif
1287
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289}
1290
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001291static void switch_data_mode(struct super_block *s, unsigned long mode)
1292{
1293 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1294 (1 << REISERFS_DATA_ORDERED) |
1295 (1 << REISERFS_DATA_WRITEBACK));
1296 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297}
1298
1299static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1300{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001301 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1302 if (!reiserfs_data_log(s)) {
1303 switch_data_mode(s, REISERFS_DATA_LOG);
1304 reiserfs_info(s, "switching to journaled data mode\n");
1305 }
1306 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1307 if (!reiserfs_data_ordered(s)) {
1308 switch_data_mode(s, REISERFS_DATA_ORDERED);
1309 reiserfs_info(s, "switching to ordered data mode\n");
1310 }
1311 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1312 if (!reiserfs_data_writeback(s)) {
1313 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1314 reiserfs_info(s, "switching to writeback data mode\n");
1315 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317}
1318
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001319static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001321 int flush = (1 << REISERFS_BARRIER_FLUSH);
1322 int none = (1 << REISERFS_BARRIER_NONE);
1323 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001325 if (bits & all_barrier) {
1326 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1327 if (bits & flush) {
1328 REISERFS_SB(s)->s_mount_opt |= flush;
1329 printk("reiserfs: enabling write barrier flush mode\n");
1330 } else if (bits & none) {
1331 REISERFS_SB(s)->s_mount_opt |= none;
1332 printk("reiserfs: write barriers turned off\n");
1333 }
1334 }
1335}
1336
1337static void handle_attrs(struct super_block *s)
1338{
1339 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1340
1341 if (reiserfs_attrs(s)) {
1342 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001343 reiserfs_warning(s, "super-6517", "cannot support "
1344 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001345 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 return;
1347 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001348 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001349 reiserfs_warning(s, "super-6518", "cannot support "
1350 "attributes until flag is set in "
1351 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001352 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 }
1354 }
1355}
1356
Jan Kara00b44192008-07-25 01:46:38 -07001357#ifdef CONFIG_QUOTA
1358static void handle_quota_files(struct super_block *s, char **qf_names,
1359 unsigned int *qfmt)
1360{
1361 int i;
1362
1363 for (i = 0; i < MAXQUOTAS; i++) {
1364 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1365 kfree(REISERFS_SB(s)->s_qf_names[i]);
1366 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1367 }
Jan Karaa06d7892011-12-21 17:35:34 +01001368 if (*qfmt)
1369 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
Jan Kara00b44192008-07-25 01:46:38 -07001370}
1371#endif
1372
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001373static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001375 struct reiserfs_super_block *rs;
1376 struct reiserfs_transaction_handle th;
1377 unsigned long blocks;
1378 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1379 unsigned long safe_mask = 0;
1380 unsigned int commit_max_age = (unsigned int)-1;
1381 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001382 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001383 int err;
Jan Kara00b44192008-07-25 01:46:38 -07001384 char *qf_names[MAXQUOTAS];
1385 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001387 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001388#endif
Jan Kara00b44192008-07-25 01:46:38 -07001389
Theodore Ts'o02b99842014-03-13 10:14:33 -04001390 sync_filesystem(s);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001391 reiserfs_write_lock(s);
1392
1393#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001394 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395#endif
1396
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001397 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001399 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001400 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1401 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001403 for (i = 0; i < MAXQUOTAS; i++)
1404 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1405 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001406#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001407 err = -EINVAL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04001408 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 }
Jan Kara00b44192008-07-25 01:46:38 -07001410#ifdef CONFIG_QUOTA
1411 handle_quota_files(s, qf_names, &qfmt);
1412#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001414 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001416 /* Add options that are safe here */
1417 safe_mask |= 1 << REISERFS_SMALLTAIL;
1418 safe_mask |= 1 << REISERFS_LARGETAIL;
1419 safe_mask |= 1 << REISERFS_NO_BORDER;
1420 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1421 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1422 safe_mask |= 1 << REISERFS_TEST4;
1423 safe_mask |= 1 << REISERFS_ATTRS;
1424 safe_mask |= 1 << REISERFS_XATTRS_USER;
1425 safe_mask |= 1 << REISERFS_POSIXACL;
1426 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1427 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1428 safe_mask |= 1 << REISERFS_ERROR_RO;
1429 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1430 safe_mask |= 1 << REISERFS_ERROR_PANIC;
Jan Karac3aa0772011-12-21 20:17:10 +01001431 safe_mask |= 1 << REISERFS_USRQUOTA;
1432 safe_mask |= 1 << REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433
Jeff Mahoney098297b2014-04-23 10:00:36 -04001434 /*
1435 * Update the bitmask, taking care to keep
1436 * the bits we're not allowed to change here
1437 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001438 REISERFS_SB(s)->s_mount_opt =
1439 (REISERFS_SB(s)->
1440 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001442 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1443 journal->j_max_commit_age = commit_max_age;
1444 journal->j_max_trans_age = commit_max_age;
1445 } else if (commit_max_age == 0) {
1446 /* 0 means restore defaults. */
1447 journal->j_max_commit_age = journal->j_default_max_commit_age;
1448 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1449 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001451 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001452 err = reiserfs_resize(s, blocks);
1453 if (err != 0)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001454 goto out_err_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001455 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001457 if (*mount_flags & MS_RDONLY) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001458 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001459 reiserfs_xattr_init(s, *mount_flags);
1460 /* remount read-only */
1461 if (s->s_flags & MS_RDONLY)
1462 /* it is read-only already */
Jeff Mahoney4c051412013-08-08 17:27:19 -04001463 goto out_ok_unlocked;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001464
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001465 err = dquot_suspend(s, -1);
1466 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001467 goto out_err;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001468
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001469 /* try to remount file system with read-only permissions */
1470 if (sb_umount_state(rs) == REISERFS_VALID_FS
1471 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001472 goto out_ok_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001473 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474
Jeff Mahoney4c051412013-08-08 17:27:19 -04001475 reiserfs_write_lock(s);
1476
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001477 err = journal_begin(&th, s, 10);
1478 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001479 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001481 /* Mounting a rw partition read-only. */
1482 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1483 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
Jeff Mahoney09f1b802014-04-23 10:00:39 -04001484 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001485 } else {
1486 /* remount read-write */
1487 if (!(s->s_flags & MS_RDONLY)) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001488 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001489 reiserfs_xattr_init(s, *mount_flags);
Jeff Mahoney4c051412013-08-08 17:27:19 -04001490 goto out_ok_unlocked; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001491 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001493 if (reiserfs_is_journal_aborted(journal)) {
1494 err = journal->j_errno;
Jeff Mahoney4c051412013-08-08 17:27:19 -04001495 goto out_err_unlock;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001496 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001498 handle_data_mode(s, mount_options);
1499 handle_barrier_mode(s, mount_options);
1500 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001501
1502 /* now it is safe to call journal_begin */
1503 s->s_flags &= ~MS_RDONLY;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001504 err = journal_begin(&th, s, 10);
1505 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001506 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001508 /* Mount a partition which is read-only, read-write */
1509 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1510 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1511 s->s_flags &= ~MS_RDONLY;
1512 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001513 if (!old_format_only(s))
1514 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001515 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
Jeff Mahoney09f1b802014-04-23 10:00:39 -04001516 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001517 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1518 }
1519 /* this will force a full flush of all journal lists */
1520 SB_JOURNAL(s)->j_must_wait = 1;
Jeff Mahoney58d85422014-04-23 10:00:38 -04001521 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001522 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001523 goto out_err_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001524
Jeff Mahoney4c051412013-08-08 17:27:19 -04001525 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001526 if (!(*mount_flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001527 dquot_resume(s, -1);
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001528 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001529 finish_unfinished(s);
Jeff Mahoney4c051412013-08-08 17:27:19 -04001530 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001531 reiserfs_xattr_init(s, *mount_flags);
1532 }
1533
Jeff Mahoney4c051412013-08-08 17:27:19 -04001534out_ok_unlocked:
Al Viro2a32ceb2009-05-08 16:05:57 -04001535 replace_mount_options(s, new_opts);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001536 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001537
Jeff Mahoney4c051412013-08-08 17:27:19 -04001538out_err_unlock:
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001539 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001540out_err:
1541 kfree(new_opts);
1542 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543}
1544
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001545static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001547 struct buffer_head *bh;
1548 struct reiserfs_super_block *rs;
1549 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001551 bh = sb_bread(s, offset / s->s_blocksize);
1552 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001553 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001554 "bread failed (dev %s, block %lu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001555 s->s_id, offset / s->s_blocksize,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001556 s->s_blocksize);
1557 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001560 rs = (struct reiserfs_super_block *)bh->b_data;
1561 if (!is_any_reiserfs_magic_string(rs)) {
1562 brelse(bh);
1563 return 1;
1564 }
Jeff Mahoney098297b2014-04-23 10:00:36 -04001565 /*
1566 * ok, reiserfs signature (old or new) found in at the given offset
1567 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001568 fs_blocksize = sb_blocksize(rs);
1569 brelse(bh);
1570 sb_set_blocksize(s, fs_blocksize);
1571
1572 bh = sb_bread(s, offset / s->s_blocksize);
1573 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001574 reiserfs_warning(s, "sh-2007",
1575 "bread failed (dev %s, block %lu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001576 s->s_id, offset / s->s_blocksize,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001577 s->s_blocksize);
1578 return 1;
1579 }
1580
1581 rs = (struct reiserfs_super_block *)bh->b_data;
1582 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001583 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
Fabian Frederick53872ed2014-08-08 14:21:10 -07001584 "filesystem on (dev %s, block %llu, size %lu)",
Al Viro2ccdc412013-11-22 13:25:39 -05001585 s->s_id,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001586 (unsigned long long)bh->b_blocknr,
1587 s->s_blocksize);
1588 brelse(bh);
1589 return 1;
1590 }
1591
1592 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1593 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001594 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1595 "--rebuild-tree run detected. Please run\n"
1596 "reiserfsck --rebuild-tree and wait for a "
1597 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001598 "get newer reiserfsprogs package");
1599 return 1;
1600 }
1601
1602 SB_BUFFER_WITH_SB(s) = bh;
1603 SB_DISK_SUPER_BLOCK(s) = rs;
1604
Jeff Mahoney098297b2014-04-23 10:00:36 -04001605 /*
1606 * magic is of non-standard journal filesystem, look at s_version to
1607 * find which format is in use
1608 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001609 if (is_reiserfs_jr(rs)) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001610 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001611 reiserfs_info(s, "found reiserfs format \"3.6\""
1612 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001613 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001614 reiserfs_info(s, "found reiserfs format \"3.5\""
1615 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001616 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001617 reiserfs_warning(s, "sh-2012", "found unknown "
1618 "format \"%u\" of reiserfs with "
1619 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001620 return 1;
1621 }
1622 } else
Jeff Mahoney098297b2014-04-23 10:00:36 -04001623 /*
1624 * s_version of standard format may contain incorrect
1625 * information, so we just look at the magic string
1626 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001627 reiserfs_info(s,
1628 "found reiserfs format \"%s\" with standard journal\n",
1629 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1630
1631 s->s_op = &reiserfs_sops;
1632 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001634 s->s_qcop = &reiserfs_qctl_operations;
1635 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636#endif
1637
Jeff Mahoney098297b2014-04-23 10:00:36 -04001638 /*
1639 * new format is limited by the 32 bit wide i_blocks field, want to
1640 * be one full block below that.
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001641 */
1642 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1643 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644}
1645
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001647static int reread_meta_blocks(struct super_block *s)
1648{
Jeff Mahoneya228bf82014-04-23 10:00:42 -04001649 ll_rw_block(READ, 1, &SB_BUFFER_WITH_SB(s));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001650 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1651 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001652 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001653 return 1;
1654 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001656 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657}
1658
Jeff Mahoney098297b2014-04-23 10:00:36 -04001659/* hash detection stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Jeff Mahoney098297b2014-04-23 10:00:36 -04001661/*
1662 * if root directory is empty - we set default - Yura's - hash and
1663 * warn about it
1664 * FIXME: we look for only one name in a directory. If tea and yura
1665 * both have the same value - we ask user to send report to the
1666 * mailing list
1667 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001668static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001670 int retval;
1671 struct inode *inode;
1672 struct cpu_key key;
1673 INITIALIZE_PATH(path);
1674 struct reiserfs_dir_entry de;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001675 struct reiserfs_de_head *deh;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001676 __u32 hash = DEFAULT_HASH;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001677 __u32 deh_hashval, teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001679 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001681 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1682 retval = search_by_entry_key(s, &key, &path, &de);
1683 if (retval == IO_ERROR) {
1684 pathrelse(&path);
1685 return UNSET_HASH;
1686 }
1687 if (retval == NAME_NOT_FOUND)
1688 de.de_entry_num--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001690 set_de_name_and_namelen(&de);
1691 deh = de.de_deh + de.de_entry_num;
1692
1693 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1694 /* allow override in this case */
1695 if (reiserfs_rupasov_hash(s))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001696 hash = YURA_HASH;
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001697 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1698 goto out;
1699 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700
Jeff Mahoneyc48138c2014-04-23 10:00:44 -04001701 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1702 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1703 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1704 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1705
1706 if ((teahash == r5hash && deh_hashval == r5hash) ||
1707 (teahash == yurahash && deh_hashval == yurahash) ||
1708 (r5hash == yurahash && deh_hashval == yurahash)) {
1709 reiserfs_warning(s, "reiserfs-2506",
1710 "Unable to automatically detect hash "
1711 "function. Please mount with -o "
1712 "hash={tea,rupasov,r5}");
1713 hash = UNSET_HASH;
1714 goto out;
1715 }
1716
1717 if (deh_hashval == yurahash)
1718 hash = YURA_HASH;
1719 else if (deh_hashval == teahash)
1720 hash = TEA_HASH;
1721 else if (deh_hashval == r5hash)
1722 hash = R5_HASH;
1723 else {
1724 reiserfs_warning(s, "reiserfs-2506",
1725 "Unrecognised hash function");
1726 hash = UNSET_HASH;
1727 }
1728out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001729 pathrelse(&path);
1730 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731}
1732
Jeff Mahoney098297b2014-04-23 10:00:36 -04001733/* finds out which hash names are sorted with */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001734static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001736 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001738 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739
Jeff Mahoney098297b2014-04-23 10:00:36 -04001740 /*
1741 * reiserfs_hash_detect() == true if any of the hash mount options
1742 * were used. We must check them to make sure the user isn't
1743 * using a bad hash value
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001744 */
1745 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1746 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001748 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001749 /*
1750 * detection has found the hash, and we must check against the
1751 * mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001752 */
1753 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001754 reiserfs_warning(s, "reiserfs-2507",
1755 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001756 "unable to force rupasov hash",
1757 reiserfs_hashname(code));
1758 code = UNSET_HASH;
1759 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001760 reiserfs_warning(s, "reiserfs-2508",
1761 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001762 "unable to force tea hash",
1763 reiserfs_hashname(code));
1764 code = UNSET_HASH;
1765 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001766 reiserfs_warning(s, "reiserfs-2509",
1767 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001768 "unable to force r5 hash",
1769 reiserfs_hashname(code));
1770 code = UNSET_HASH;
1771 }
1772 } else {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001773 /*
1774 * find_hash_out was not called or
1775 * could not determine the hash
1776 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001777 if (reiserfs_rupasov_hash(s)) {
1778 code = YURA_HASH;
1779 } else if (reiserfs_tea_hash(s)) {
1780 code = TEA_HASH;
1781 } else if (reiserfs_r5_hash(s)) {
1782 code = R5_HASH;
1783 }
1784 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785
Jeff Mahoney098297b2014-04-23 10:00:36 -04001786 /*
1787 * if we are mounted RW, and we have a new valid hash code, update
1788 * the super
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001789 */
1790 if (code != UNSET_HASH &&
1791 !(s->s_flags & MS_RDONLY) &&
1792 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1793 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1794 }
1795 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796}
1797
Jeff Mahoney098297b2014-04-23 10:00:36 -04001798/* return pointer to appropriate function */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001799static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001801 switch (what_hash(s)) {
1802 case TEA_HASH:
1803 reiserfs_info(s, "Using tea hash to sort names\n");
1804 return keyed_hash;
1805 case YURA_HASH:
1806 reiserfs_info(s, "Using rupasov hash to sort names\n");
1807 return yura_hash;
1808 case R5_HASH:
1809 reiserfs_info(s, "Using r5 hash to sort names\n");
1810 return r5_hash;
1811 }
1812 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813}
1814
Jeff Mahoney098297b2014-04-23 10:00:36 -04001815/* this is used to set up correct value for old partitions */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001816static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001818 if (func == keyed_hash)
1819 return TEA_HASH;
1820 if (func == yura_hash)
1821 return YURA_HASH;
1822 if (func == r5_hash)
1823 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824
Jeff Mahoney098297b2014-04-23 10:00:36 -04001825 BUG(); /* should never happen */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001827 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828}
1829
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001830#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001832 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001834static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001836 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001837 struct reiserfs_transaction_handle th;
1838 int old_format = 0;
1839 unsigned long blocks;
1840 unsigned int commit_max_age = 0;
1841 int jinit_done = 0;
1842 struct reiserfs_iget_args args;
1843 struct reiserfs_super_block *rs;
1844 char *jdev_name;
1845 struct reiserfs_sb_info *sbi;
1846 int errval = -EINVAL;
Jan Kara00b44192008-07-25 01:46:38 -07001847 char *qf_names[MAXQUOTAS] = {};
1848 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001850 save_mount_options(s, data);
1851
Yan Burman01afb212006-12-06 20:39:01 -08001852 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001853 if (!sbi)
1854 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001855 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001856 /* Set default values for options: non-aggressive tails, RO on errors */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001857 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1858 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1859 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001860 /* no preallocation minimum, be smart in reiserfs_file_write instead */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001861 sbi->s_alloc_options.preallocmin = 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001862 /* Preallocate by 16 blocks (17-1) at once */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001863 sbi->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001864 /* setup default block allocator options */
1865 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866
Artem Bityutskiy033369d2012-06-01 17:18:08 +03001867 spin_lock_init(&sbi->old_work_lock);
1868 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001869 mutex_init(&sbi->lock);
1870 sbi->lock_depth = -1;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001871
Jeff Mahoney797d9012014-04-23 10:00:34 -04001872 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1873 s->s_id);
1874 if (!sbi->commit_wq) {
1875 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1876 errval = -ENOMEM;
1877 goto error_unlocked;
1878 }
1879
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001880 jdev_name = NULL;
1881 if (reiserfs_parse_options
Jeff Mahoneya228bf82014-04-23 10:00:42 -04001882 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001883 &commit_max_age, qf_names, &qfmt) == 0) {
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001884 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001885 }
Jan Karac3aa0772011-12-21 20:17:10 +01001886 if (jdev_name && jdev_name[0]) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001887 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1888 if (!sbi->s_jdev) {
Jan Karac3aa0772011-12-21 20:17:10 +01001889 SWARN(silent, s, "", "Cannot allocate memory for "
1890 "journal device name");
1891 goto error;
1892 }
1893 }
Jan Kara00b44192008-07-25 01:46:38 -07001894#ifdef CONFIG_QUOTA
1895 handle_quota_files(s, qf_names, &qfmt);
1896#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001898 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001899 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001900 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001901 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902
Jeff Mahoney098297b2014-04-23 10:00:36 -04001903 /*
1904 * try old format (undistributed bitmap, super block in 8-th 1k
1905 * block of a device)
1906 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001907 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1908 old_format = 1;
Jeff Mahoney098297b2014-04-23 10:00:36 -04001909
1910 /*
1911 * try new format (64-th 1k block), which can contain reiserfs
1912 * super block
1913 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001914 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001915 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Al Viro2ccdc412013-11-22 13:25:39 -05001916 s->s_id);
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001917 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001918 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001920 rs = SB_DISK_SUPER_BLOCK(s);
Jeff Mahoney098297b2014-04-23 10:00:36 -04001921 /*
1922 * Let's do basic sanity check to verify that underlying device is not
1923 * smaller than the filesystem. If the check fails then abort and
1924 * scream, because bad stuff will happen otherwise.
1925 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001926 if (s->s_bdev && s->s_bdev->bd_inode
1927 && i_size_read(s->s_bdev->bd_inode) <
1928 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001929 SWARN(silent, s, "", "Filesystem cannot be "
1930 "mounted because it is bigger than the device");
1931 SWARN(silent, s, "", "You may need to run fsck "
1932 "or increase size of your LVM partition");
1933 SWARN(silent, s, "", "Or may be you forgot to "
1934 "reboot after fdisk when it told you to");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001935 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001936 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001938 sbi->s_mount_state = SB_REISERFS_STATE(s);
1939 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940
Jeff Mahoney6f010462006-09-30 23:28:43 -07001941 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001942 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001943 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001944 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001945
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001946 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001948 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1949 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950#endif
1951
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001952 /* make data=ordered the default */
1953 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1954 !reiserfs_data_writeback(s)) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001955 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956 }
1957
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001958 if (reiserfs_data_log(s)) {
1959 reiserfs_info(s, "using journaled data mode\n");
1960 } else if (reiserfs_data_ordered(s)) {
1961 reiserfs_info(s, "using ordered data mode\n");
1962 } else {
1963 reiserfs_info(s, "using writeback data mode\n");
1964 }
1965 if (reiserfs_barrier_flush(s)) {
1966 printk("reiserfs: using flush barriers\n");
1967 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001968
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08001969 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1970 SWARN(silent, s, "sh-2022",
1971 "unable to initialize journal space");
1972 goto error_unlocked;
1973 } else {
Jeff Mahoney098297b2014-04-23 10:00:36 -04001974 /*
1975 * once this is set, journal_release must be called
1976 * if we error out of the mount
1977 */
1978 jinit_done = 1;
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08001979 }
1980
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001981 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001982 SWARN(silent, s, "jmacd-9",
1983 "unable to reread meta blocks after journal init");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001984 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 }
1986
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001987 if (replay_only(s))
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001988 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001989
1990 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001991 SWARN(silent, s, "clm-7000",
1992 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001993 s->s_flags |= MS_RDONLY;
1994 }
1995 args.objectid = REISERFS_ROOT_OBJECTID;
1996 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1997 root_inode =
1998 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
Jeff Mahoneya228bf82014-04-23 10:00:42 -04001999 reiserfs_init_locked_inode, (void *)&args);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002000 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002001 SWARN(silent, s, "jmacd-10", "get root inode failed");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08002002 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 }
2004
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08002005 /*
2006 * This path assumed to be called with the BKL in the old times.
2007 * Now we have inherited the big reiserfs lock from it and many
2008 * reiserfs helpers called in the mount path and elsewhere require
2009 * this lock to be held even if it's not always necessary. Let's be
2010 * conservative and hold it early. The window can be reduced after
2011 * careful review of the code.
2012 */
2013 reiserfs_write_lock(s);
2014
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002015 if (root_inode->i_state & I_NEW) {
2016 reiserfs_read_locked_inode(root_inode, &args);
2017 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 }
2019
Al Viro48fde702012-01-08 22:15:13 -05002020 s->s_root = d_make_root(root_inode);
2021 if (!s->s_root)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002022 goto error;
Jeff Mahoney098297b2014-04-23 10:00:36 -04002023 /* define and initialize hash function */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002024 sbi->s_hash_function = hash_function(s);
2025 if (sbi->s_hash_function == NULL) {
2026 dput(s->s_root);
2027 s->s_root = NULL;
2028 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002030
2031 if (is_reiserfs_3_5(rs)
2032 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002033 set_bit(REISERFS_3_5, &sbi->s_properties);
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07002034 else if (old_format)
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002035 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002036 else
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002037 set_bit(REISERFS_3_6, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002038
2039 if (!(s->s_flags & MS_RDONLY)) {
2040
2041 errval = journal_begin(&th, s, 1);
2042 if (errval) {
2043 dput(s->s_root);
2044 s->s_root = NULL;
2045 goto error;
2046 }
2047 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2048
2049 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2050 set_sb_fs_state(rs, 0);
2051
Jeff Mahoney098297b2014-04-23 10:00:36 -04002052 /*
2053 * Clear out s_bmap_nr if it would wrap. We can handle this
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002054 * case, but older revisions can't. This will cause the
2055 * file system to fail mount on those older implementations,
Jeff Mahoney098297b2014-04-23 10:00:36 -04002056 * avoiding corruption. -jeffm
2057 */
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002058 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2059 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002060 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07002061 "claims to use %u bitmap blocks in "
2062 "its super block, but requires %u. "
2063 "Clearing to zero.", sb_bmap_nr(rs),
2064 reiserfs_bmap_count(s));
2065
2066 set_sb_bmap_nr(rs, 0);
2067 }
2068
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002069 if (old_format_only(s)) {
Jeff Mahoney098297b2014-04-23 10:00:36 -04002070 /*
2071 * filesystem of format 3.5 either with standard
2072 * or non-standard journal
2073 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002074 if (convert_reiserfs(s)) {
2075 /* and -o conv is given */
2076 if (!silent)
2077 reiserfs_info(s,
2078 "converting 3.5 filesystem to the 3.6 format");
2079
2080 if (is_reiserfs_3_5(rs))
Jeff Mahoney098297b2014-04-23 10:00:36 -04002081 /*
2082 * put magic string of 3.6 format.
2083 * 2.2 will not be able to
2084 * mount this filesystem anymore
2085 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002086 memcpy(rs->s_v1.s_magic,
2087 reiserfs_3_6_magic_string,
2088 sizeof
2089 (reiserfs_3_6_magic_string));
2090
2091 set_sb_version(rs, REISERFS_VERSION_2);
2092 reiserfs_convert_objectid_map_v1(s);
Jeff Mahoneya228bf82014-04-23 10:00:42 -04002093 set_bit(REISERFS_3_6, &sbi->s_properties);
2094 clear_bit(REISERFS_3_5, &sbi->s_properties);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002095 } else if (!silent) {
2096 reiserfs_info(s, "using 3.5.x disk format\n");
2097 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04002098 } else
2099 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2100
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002101
Jeff Mahoney09f1b802014-04-23 10:00:39 -04002102 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
Jeff Mahoney58d85422014-04-23 10:00:38 -04002103 errval = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002104 if (errval) {
2105 dput(s->s_root);
2106 s->s_root = NULL;
2107 goto error;
2108 }
2109
Jeff Mahoney4c051412013-08-08 17:27:19 -04002110 reiserfs_write_unlock(s);
Al Viroedcc37a2009-05-03 06:00:05 -04002111 if ((errval = reiserfs_lookup_privroot(s)) ||
2112 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002113 dput(s->s_root);
2114 s->s_root = NULL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04002115 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002116 }
Jeff Mahoney4c051412013-08-08 17:27:19 -04002117 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002118
Jeff Mahoney098297b2014-04-23 10:00:36 -04002119 /*
2120 * look for files which were to be removed in previous session
2121 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002122 finish_unfinished(s);
2123 } else {
2124 if (old_format_only(s) && !silent) {
2125 reiserfs_info(s, "using 3.5.x disk format\n");
2126 }
2127
Jeff Mahoney4c051412013-08-08 17:27:19 -04002128 reiserfs_write_unlock(s);
Al Viroedcc37a2009-05-03 06:00:05 -04002129 if ((errval = reiserfs_lookup_privroot(s)) ||
2130 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002131 dput(s->s_root);
2132 s->s_root = NULL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04002133 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002134 }
Jeff Mahoney4c051412013-08-08 17:27:19 -04002135 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002136 }
Jeff Mahoney098297b2014-04-23 10:00:36 -04002137 /*
2138 * mark hash in super block: it could be unset. overwrite should be ok
2139 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002140 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2141
2142 handle_attrs(s);
2143
2144 reiserfs_proc_info_init(s);
2145
2146 init_waitqueue_head(&(sbi->s_wait));
2147 spin_lock_init(&sbi->bitmap_lock);
2148
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02002149 reiserfs_write_unlock(s);
2150
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002151 return (0);
2152
Jan Kara00b44192008-07-25 01:46:38 -07002153error:
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04002154 reiserfs_write_unlock(s);
2155
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002156error_unlocked:
2157 /* kill the commit thread, free journal ram */
2158 if (jinit_done) {
2159 reiserfs_write_lock(s);
2160 journal_release_error(NULL, s);
2161 reiserfs_write_unlock(s);
2162 }
2163
Artem Bityutskiy033369d2012-06-01 17:18:08 +03002164 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
2165
Jeff Mahoney50652272006-09-30 23:28:44 -07002166 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002167 if (SB_BUFFER_WITH_SB(s))
2168 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07002170 {
2171 int j;
Jan Kara00b44192008-07-25 01:46:38 -07002172 for (j = 0; j < MAXQUOTAS; j++)
2173 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002174 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175#endif
James Lamanna833d3042005-10-30 15:00:16 -08002176 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002178 s->s_fs_info = NULL;
2179 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180}
2181
David Howells726c3342006-06-23 02:02:58 -07002182static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183{
David Howells726c3342006-06-23 02:02:58 -07002184 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002185
2186 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2187 buf->f_bfree = sb_free_blocks(rs);
2188 buf->f_bavail = buf->f_bfree;
2189 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07002190 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002191 /* changed to accommodate gcc folks. */
2192 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07002193 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2194 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2195 sizeof(rs->s_uuid)/2);
2196
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002197 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198}
2199
2200#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201static int reiserfs_write_dquot(struct dquot *dquot)
2202{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002203 struct reiserfs_transaction_handle th;
2204 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002205 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002207 reiserfs_write_lock(dquot->dq_sb);
2208 ret =
2209 journal_begin(&th, dquot->dq_sb,
2210 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2211 if (ret)
2212 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002213 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002214 ret = dquot_commit(dquot);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002215 reiserfs_write_lock_nested(dquot->dq_sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002216 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002217 if (!ret && err)
2218 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002219out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002220 reiserfs_write_unlock(dquot->dq_sb);
2221 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222}
2223
2224static int reiserfs_acquire_dquot(struct dquot *dquot)
2225{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002226 struct reiserfs_transaction_handle th;
2227 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002228 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002230 reiserfs_write_lock(dquot->dq_sb);
2231 ret =
2232 journal_begin(&th, dquot->dq_sb,
2233 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2234 if (ret)
2235 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002236 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002237 ret = dquot_acquire(dquot);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002238 reiserfs_write_lock_nested(dquot->dq_sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002239 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002240 if (!ret && err)
2241 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002242out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002243 reiserfs_write_unlock(dquot->dq_sb);
2244 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245}
2246
2247static int reiserfs_release_dquot(struct dquot *dquot)
2248{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002249 struct reiserfs_transaction_handle th;
2250 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002252 reiserfs_write_lock(dquot->dq_sb);
2253 ret =
2254 journal_begin(&th, dquot->dq_sb,
2255 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara7af11682012-11-13 17:05:14 +01002256 reiserfs_write_unlock(dquot->dq_sb);
Jan Kara9c3013e2007-09-11 15:23:29 -07002257 if (ret) {
2258 /* Release dquot anyway to avoid endless cycle in dqput() */
2259 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002260 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07002261 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002262 ret = dquot_release(dquot);
Jan Kara7af11682012-11-13 17:05:14 +01002263 reiserfs_write_lock(dquot->dq_sb);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002264 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002265 if (!ret && err)
2266 ret = err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002267 reiserfs_write_unlock(dquot->dq_sb);
Jan Kara7af11682012-11-13 17:05:14 +01002268out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002269 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270}
2271
2272static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2273{
Jan Kara45065672008-07-25 01:46:37 -07002274 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002275 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2276 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2277 dquot_mark_dquot_dirty(dquot);
2278 return reiserfs_write_dquot(dquot);
2279 } else
2280 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281}
2282
2283static int reiserfs_write_info(struct super_block *sb, int type)
2284{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002285 struct reiserfs_transaction_handle th;
2286 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002287 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002289 /* Data block + inode block */
2290 reiserfs_write_lock(sb);
2291 ret = journal_begin(&th, sb, 2);
2292 if (ret)
2293 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002294 depth = reiserfs_write_unlock_nested(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002295 ret = dquot_commit_info(sb, type);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002296 reiserfs_write_lock_nested(sb, depth);
Jeff Mahoney58d85422014-04-23 10:00:38 -04002297 err = journal_end(&th);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002298 if (!ret && err)
2299 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002300out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002301 reiserfs_write_unlock(sb);
2302 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303}
2304
2305/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002306 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307 */
2308static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2309{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002310 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2311 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312}
2313
2314/*
2315 * Standard function to be called on quota_on
2316 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002317static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Jan Karaf00c9e42010-09-15 17:38:58 +02002318 struct path *path)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002320 int err;
Jan Karad5dee5c2008-04-28 02:16:23 -07002321 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002322 struct reiserfs_transaction_handle th;
Jan Karac3aa0772011-12-21 20:17:10 +01002323 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324
Jan Karab9e06ef2012-11-13 16:34:17 +01002325 reiserfs_write_lock(sb);
2326 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2327 err = -EINVAL;
2328 goto out;
2329 }
Christoph Hellwig307ae182010-05-19 07:16:43 -04002330
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002331 /* Quotafile not on the same filesystem? */
Al Virod8c95842011-12-07 18:16:57 -05002332 if (path->dentry->d_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002333 err = -EXDEV;
2334 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002335 }
Jan Karaf00c9e42010-09-15 17:38:58 +02002336 inode = path->dentry->d_inode;
Jeff Mahoney098297b2014-04-23 10:00:36 -04002337 /*
2338 * We must not pack tails for quota files on reiserfs for quota
2339 * IO to work
2340 */
Jan Karad5dee5c2008-04-28 02:16:23 -07002341 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2342 err = reiserfs_unpack(inode, NULL);
2343 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002344 reiserfs_warning(sb, "super-6520",
2345 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002346 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002347 err = -EINVAL;
2348 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002349 }
2350 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002351 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002352 /* Journaling quota? */
2353 if (REISERFS_SB(sb)->s_qf_names[type]) {
2354 /* Quotafile not of fs root? */
Jan Karaf00c9e42010-09-15 17:38:58 +02002355 if (path->dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002356 reiserfs_warning(sb, "super-6521",
2357 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002358 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002359 }
2360
2361 /*
2362 * When we journal data on quota file, we have to flush journal to see
2363 * all updates to the file when we bypass pagecache...
2364 */
2365 if (reiserfs_file_data_log(inode)) {
2366 /* Just start temporary transaction and finish it */
2367 err = journal_begin(&th, sb, 1);
2368 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002369 goto out;
Jeff Mahoney58d85422014-04-23 10:00:38 -04002370 err = journal_end_sync(&th);
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002371 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002372 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002373 }
Jan Karab9e06ef2012-11-13 16:34:17 +01002374 reiserfs_write_unlock(sb);
2375 return dquot_quota_on(sb, type, format_id, path);
Al Viro77e69da2008-08-01 04:29:18 -04002376out:
Jan Karab9e06ef2012-11-13 16:34:17 +01002377 reiserfs_write_unlock(sb);
Al Viro77e69da2008-08-01 04:29:18 -04002378 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379}
2380
Jeff Mahoney098297b2014-04-23 10:00:36 -04002381/*
2382 * Read data from quotafile - avoid pagecache and such because we cannot afford
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002384 * itself serializes the operations (and no one else should touch the files)
Jeff Mahoney098297b2014-04-23 10:00:36 -04002385 * we don't have to be afraid of races
2386 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2388 size_t len, loff_t off)
2389{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002390 struct inode *inode = sb_dqopt(sb)->files[type];
2391 unsigned long blk = off >> sb->s_blocksize_bits;
2392 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2393 size_t toread;
2394 struct buffer_head tmp_bh, *bh;
2395 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002397 if (off > i_size)
2398 return 0;
2399 if (off + len > i_size)
2400 len = i_size - off;
2401 toread = len;
2402 while (toread > 0) {
2403 tocopy =
2404 sb->s_blocksize - offset <
2405 toread ? sb->s_blocksize - offset : toread;
2406 tmp_bh.b_state = 0;
Jeff Mahoney098297b2014-04-23 10:00:36 -04002407 /*
2408 * Quota files are without tails so we can safely
2409 * use this function
2410 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002411 reiserfs_write_lock(sb);
2412 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2413 reiserfs_write_unlock(sb);
2414 if (err)
2415 return err;
2416 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2417 memset(data, 0, tocopy);
2418 else {
2419 bh = sb_bread(sb, tmp_bh.b_blocknr);
2420 if (!bh)
2421 return -EIO;
2422 memcpy(data, bh->b_data + offset, tocopy);
2423 brelse(bh);
2424 }
2425 offset = 0;
2426 toread -= tocopy;
2427 data += tocopy;
2428 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002430 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431}
2432
Jeff Mahoney098297b2014-04-23 10:00:36 -04002433/*
2434 * Write to quotafile (we know the transaction is already started and has
2435 * enough credits)
2436 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2438 const char *data, size_t len, loff_t off)
2439{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002440 struct inode *inode = sb_dqopt(sb)->files[type];
2441 unsigned long blk = off >> sb->s_blocksize_bits;
2442 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2443 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2444 size_t towrite = len;
2445 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002446
Jan Kara9c3013e2007-09-11 15:23:29 -07002447 if (!current->journal_info) {
Fabian Frederick53872ed2014-08-08 14:21:10 -07002448 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
Jan Kara9c3013e2007-09-11 15:23:29 -07002449 (unsigned long long)off, (unsigned long long)len);
2450 return -EIO;
2451 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002452 while (towrite > 0) {
2453 tocopy = sb->s_blocksize - offset < towrite ?
2454 sb->s_blocksize - offset : towrite;
2455 tmp_bh.b_state = 0;
Jan Kara361d94a2012-11-13 18:25:38 +01002456 reiserfs_write_lock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002457 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
Jan Kara361d94a2012-11-13 18:25:38 +01002458 reiserfs_write_unlock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002459 if (err)
2460 goto out;
2461 if (offset || tocopy != sb->s_blocksize)
2462 bh = sb_bread(sb, tmp_bh.b_blocknr);
2463 else
2464 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2465 if (!bh) {
2466 err = -EIO;
2467 goto out;
2468 }
2469 lock_buffer(bh);
2470 memcpy(bh->b_data + offset, data, tocopy);
2471 flush_dcache_page(bh->b_page);
2472 set_buffer_uptodate(bh);
2473 unlock_buffer(bh);
Jan Kara361d94a2012-11-13 18:25:38 +01002474 reiserfs_write_lock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002475 reiserfs_prepare_for_journal(sb, bh, 1);
Jeff Mahoney09f1b802014-04-23 10:00:39 -04002476 journal_mark_dirty(current->journal_info, bh);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002477 if (!journal_quota)
2478 reiserfs_add_ordered_list(inode, bh);
Jan Kara361d94a2012-11-13 18:25:38 +01002479 reiserfs_write_unlock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002480 brelse(bh);
2481 offset = 0;
2482 towrite -= tocopy;
2483 data += tocopy;
2484 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002485 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002486out:
Jan Kara67f16482012-04-25 21:28:12 +02002487 if (len == towrite)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002488 return err;
2489 if (inode->i_size < off + len - towrite)
2490 i_size_write(inode, off + len - towrite);
2491 inode->i_version++;
2492 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2493 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002494 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495}
2496
2497#endif
2498
Al Viro152a0832010-07-25 00:46:55 +04002499static struct dentry *get_super_block(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -07002500 int flags, const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04002501 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502{
Al Viro152a0832010-07-25 00:46:55 +04002503 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504}
2505
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002506static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507{
2508 int ret;
2509
Jeff Mahoney797d9012014-04-23 10:00:34 -04002510 ret = init_inodecache();
2511 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002514 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002516 ret = register_filesystem(&reiserfs_fs_type);
Jeff Mahoney797d9012014-04-23 10:00:34 -04002517 if (ret)
2518 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519
Jeff Mahoney797d9012014-04-23 10:00:34 -04002520 return 0;
2521out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002522 reiserfs_proc_info_global_done();
2523 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524
2525 return ret;
2526}
2527
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002528static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002530 reiserfs_proc_info_global_done();
2531 unregister_filesystem(&reiserfs_fs_type);
2532 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533}
2534
2535struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002536 .owner = THIS_MODULE,
2537 .name = "reiserfs",
Al Viro152a0832010-07-25 00:46:55 +04002538 .mount = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002539 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002540 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08002542MODULE_ALIAS_FS("reiserfs");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002543
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002544MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2545MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2546MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002548module_init(init_reiserfs_fs);
2549module_exit(exit_reiserfs_fs);