blob: 3ead145dadc406646f742f519befe3ef9a2db6b9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
10 *
11 * NO WARRANTY
12 */
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/vmalloc.h>
17#include <linux/time.h>
18#include <asm/uaccess.h>
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);
Jan Karac3aa0772011-12-21 20:17:10 +010065void show_alloc_options(struct seq_file *seq, struct super_block *s);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070067static int reiserfs_sync_fs(struct super_block *s, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068{
Christoph Hellwig5af79262009-05-05 15:41:25 +020069 struct reiserfs_transaction_handle th;
70
Jan Karaa1177822012-07-03 16:45:29 +020071 /*
72 * Writeback quota in non-journalled quota case - journalled quota has
73 * no dirty dquots
74 */
75 dquot_writeback_dquots(s, -1);
Christoph Hellwig5af79262009-05-05 15:41:25 +020076 reiserfs_write_lock(s);
77 if (!journal_begin(&th, s, 1))
78 if (!journal_end_sync(&th, s, 1))
79 reiserfs_flush_old_commits(s);
Christoph Hellwig5af79262009-05-05 15:41:25 +020080 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070081 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082}
83
Artem Bityutskiy033369d2012-06-01 17:18:08 +030084static void flush_old_commits(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Artem Bityutskiy033369d2012-06-01 17:18:08 +030086 struct reiserfs_sb_info *sbi;
87 struct super_block *s;
88
89 sbi = container_of(work, struct reiserfs_sb_info, old_work.work);
90 s = sbi->s_journal->j_work_sb;
91
92 spin_lock(&sbi->old_work_lock);
93 sbi->work_queued = 0;
94 spin_unlock(&sbi->old_work_lock);
95
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070096 reiserfs_sync_fs(s, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097}
98
Artem Bityutskiy033369d2012-06-01 17:18:08 +030099void reiserfs_schedule_old_flush(struct super_block *s)
100{
101 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
102 unsigned long delay;
103
104 if (s->s_flags & MS_RDONLY)
105 return;
106
107 spin_lock(&sbi->old_work_lock);
108 if (!sbi->work_queued) {
109 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
110 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
111 sbi->work_queued = 1;
112 }
113 spin_unlock(&sbi->old_work_lock);
114}
115
116static void cancel_old_flush(struct super_block *s)
117{
118 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
119
120 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
121 spin_lock(&sbi->old_work_lock);
122 sbi->work_queued = 0;
123 spin_unlock(&sbi->old_work_lock);
124}
125
Takashi Satoc4be0c12009-01-09 16:40:58 -0800126static int reiserfs_freeze(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700128 struct reiserfs_transaction_handle th;
Artem Bityutskiy033369d2012-06-01 17:18:08 +0300129
130 cancel_old_flush(s);
131
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700132 reiserfs_write_lock(s);
133 if (!(s->s_flags & MS_RDONLY)) {
134 int err = journal_begin(&th, s, 1);
135 if (err) {
136 reiserfs_block_writes(&th);
137 } else {
138 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
139 1);
140 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
141 reiserfs_block_writes(&th);
142 journal_end_sync(&th, s, 1);
143 }
144 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700145 reiserfs_write_unlock(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800146 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147}
148
Takashi Satoc4be0c12009-01-09 16:40:58 -0800149static int reiserfs_unfreeze(struct super_block *s)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700150{
151 reiserfs_allow_writes(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800152 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153}
154
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700155extern const struct in_core_key MAX_IN_CORE_KEY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157/* this is used to delete "save link" when there are no items of a
158 file it points to. It can either happen if unlink is completed but
159 "save unlink" removal, or if file has both unlink and truncate
160 pending and as unlink completes first (because key of "save link"
161 protecting unlink is bigger that a key lf "save link" which
162 protects truncate), so there left no items to make truncate
163 completion on */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700164static int remove_save_link_only(struct super_block *s,
165 struct reiserfs_key *key, int oid_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700167 struct reiserfs_transaction_handle th;
168 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700170 /* we are going to do one balancing */
171 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
172 if (err)
173 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700175 reiserfs_delete_solid_item(&th, NULL, key);
176 if (oid_free)
177 /* removals are protected by direct items */
178 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
179
180 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183#ifdef CONFIG_QUOTA
184static int reiserfs_quota_on_mount(struct super_block *, int);
185#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187/* look for uncompleted unlinks and truncates and complete them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700188static int finish_unfinished(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700190 INITIALIZE_PATH(path);
191 struct cpu_key max_cpu_key, obj_key;
Lepton Wufb46f342007-10-16 23:30:04 -0700192 struct reiserfs_key save_link_key, last_inode_key;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700193 int retval = 0;
194 struct item_head *ih;
195 struct buffer_head *bh;
196 int item_pos;
197 char *item;
198 int done;
199 struct inode *inode;
200 int truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700202 int i;
203 int ms_active_set;
Jan Karaf4b113a2010-05-21 19:12:51 +0200204 int quota_enabled[MAXQUOTAS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700206
207 /* compose key to look for "save" links */
208 max_cpu_key.version = KEY_FORMAT_3_5;
209 max_cpu_key.on_disk_key.k_dir_id = ~0U;
210 max_cpu_key.on_disk_key.k_objectid = ~0U;
211 set_cpu_key_k_offset(&max_cpu_key, ~0U);
212 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Lepton Wufb46f342007-10-16 23:30:04 -0700214 memset(&last_inode_key, 0, sizeof(last_inode_key));
215
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700217 /* Needed for iput() to work correctly and not trash data */
218 if (s->s_flags & MS_ACTIVE) {
219 ms_active_set = 0;
220 } else {
221 ms_active_set = 1;
222 s->s_flags |= MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700224 /* Turn on quotas so that they are updated correctly */
225 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200226 quota_enabled[i] = 1;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700227 if (REISERFS_SB(s)->s_qf_names[i]) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200228 int ret;
229
230 if (sb_has_quota_active(s, i)) {
231 quota_enabled[i] = 0;
232 continue;
233 }
234 ret = reiserfs_quota_on_mount(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700235 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400236 reiserfs_warning(s, "reiserfs-2500",
237 "cannot turn on journaled "
238 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700239 }
240 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700243 done = 0;
244 REISERFS_SB(s)->s_is_unlinked_ok = 1;
245 while (!retval) {
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400246 int depth;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700247 retval = search_item(s, &max_cpu_key, &path);
248 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400249 reiserfs_error(s, "vs-2140",
250 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700251 break;
252 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700254 bh = get_last_bh(&path);
255 item_pos = get_item_pos(&path);
256 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400257 reiserfs_warning(s, "vs-2060",
258 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700259 break;
260 }
261 item_pos--;
262 ih = B_N_PITEM_HEAD(bh, item_pos);
263
264 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
265 /* there are no "save" links anymore */
266 break;
267
268 save_link_key = ih->ih_key;
269 if (is_indirect_le_ih(ih))
270 truncate = 1;
271 else
272 truncate = 0;
273
274 /* reiserfs_iget needs k_dirid and k_objectid only */
275 item = B_I_PITEM(bh, ih);
276 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
277 obj_key.on_disk_key.k_objectid =
278 le32_to_cpu(ih->ih_key.k_objectid);
279 obj_key.on_disk_key.k_offset = 0;
280 obj_key.on_disk_key.k_type = 0;
281
282 pathrelse(&path);
283
284 inode = reiserfs_iget(s, &obj_key);
285 if (!inode) {
286 /* the unlink almost completed, it just did not manage to remove
287 "save" link and release objectid */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400288 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700289 &obj_key);
290 retval = remove_save_link_only(s, &save_link_key, 1);
291 continue;
292 }
293
294 if (!truncate && inode->i_nlink) {
295 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400296 reiserfs_warning(s, "vs-2185",
297 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700298 &obj_key);
299 retval = remove_save_link_only(s, &save_link_key, 0);
300 continue;
301 }
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400302 depth = reiserfs_write_unlock_nested(inode->i_sb);
Christoph Hellwig871a2932010-03-03 09:05:07 -0500303 dquot_initialize(inode);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400304 reiserfs_write_lock_nested(inode->i_sb, depth);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700305
306 if (truncate && S_ISDIR(inode->i_mode)) {
307 /* We got a truncate request for a dir which is impossible.
308 The only imaginable way is to execute unfinished truncate request
309 then boot into old kernel, remove the file and create dir with
310 the same key. */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400311 reiserfs_warning(s, "green-2101",
312 "impossible truncate on a "
313 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700314 INODE_PKEY(inode));
315 retval = remove_save_link_only(s, &save_link_key, 0);
316 truncate = 0;
317 iput(inode);
318 continue;
319 }
320
321 if (truncate) {
322 REISERFS_I(inode)->i_flags |=
323 i_link_saved_truncate_mask;
324 /* not completed truncate found. New size was committed together
325 with "save" link */
326 reiserfs_info(s, "Truncating %k to %Ld ..",
327 INODE_PKEY(inode), inode->i_size);
328 reiserfs_truncate_file(inode,
329 0
330 /*don't update modification time */
331 );
332 retval = remove_save_link(inode, truncate);
333 } else {
334 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
335 /* not completed unlink (rmdir) found */
336 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700337 if (memcmp(&last_inode_key, INODE_PKEY(inode),
338 sizeof(last_inode_key))){
339 last_inode_key = *INODE_PKEY(inode);
340 /* removal gets completed in iput */
341 retval = 0;
342 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400343 reiserfs_warning(s, "super-2189", "Dead loop "
344 "in finish_unfinished "
345 "detected, just remove "
346 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700347 retval = remove_save_link_only(s,
348 &save_link_key, 0);
349 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700350 }
351
352 iput(inode);
353 printk("done\n");
354 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700356 REISERFS_SB(s)->s_is_unlinked_ok = 0;
357
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700359 /* Turn quotas off */
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400360 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700361 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200362 if (sb_dqopt(s)->files[i] && quota_enabled[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400363 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700364 }
Jeff Mahoneyd2d03952013-08-08 17:34:47 -0400365 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700366 if (ms_active_set)
367 /* Restore the flag back */
368 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700370 pathrelse(&path);
371 if (done)
372 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
373 "Completed\n", done);
374 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700376
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377/* to protect file being unlinked from getting lost we "safe" link files
378 being unlinked. This link will be deleted in the same transaction with last
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200379 item of file. mounting the filesystem we scan all these links and remove
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 files which almost got lost */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700381void add_save_link(struct reiserfs_transaction_handle *th,
382 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700384 INITIALIZE_PATH(path);
385 int retval;
386 struct cpu_key key;
387 struct item_head ih;
388 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700390 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700392 /* file can only get one "save link" of each kind */
393 RFALSE(truncate &&
394 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
395 "saved link already exists for truncated inode %lx",
396 (long)inode->i_ino);
397 RFALSE(!truncate &&
398 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
399 "saved link already exists for unlinked inode %lx",
400 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700402 /* setup key of "save" link */
403 key.version = KEY_FORMAT_3_5;
404 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
405 key.on_disk_key.k_objectid = inode->i_ino;
406 if (!truncate) {
407 /* unlink, rmdir, rename */
408 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
409 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700411 /* item head of "safe" link */
412 make_le_item_head(&ih, &key, key.version,
413 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
414 4 /*length */ , 0xffff /*free space */ );
415 } else {
416 /* truncate */
417 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400418 reiserfs_warning(inode->i_sb, "green-2102",
419 "Adding a truncate savelink for "
420 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700421 INODE_PKEY(inode));
422 set_cpu_key_k_offset(&key, 1);
423 set_cpu_key_k_type(&key, TYPE_INDIRECT);
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, 1, TYPE_INDIRECT,
427 4 /*length */ , 0 /*free space */ );
428 }
429 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700431 /* look for its place in the tree */
432 retval = search_item(inode->i_sb, &key, &path);
433 if (retval != ITEM_NOT_FOUND) {
434 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400435 reiserfs_error(inode->i_sb, "vs-2100",
436 "search_by_key (%K) returned %d", &key,
437 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700438 pathrelse(&path);
439 return;
440 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700442 /* body of "save" link */
443 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300445 /* put "save" link into tree, don't charge quota to anyone */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700446 retval =
447 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
448 if (retval) {
449 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400450 reiserfs_error(inode->i_sb, "vs-2120",
451 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700452 } else {
453 if (truncate)
454 REISERFS_I(inode)->i_flags |=
455 i_link_saved_truncate_mask;
456 else
457 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
458 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459}
460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700462int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700464 struct reiserfs_transaction_handle th;
465 struct reiserfs_key key;
466 int err;
467
468 /* we are going to do one balancing only */
469 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
470 if (err)
471 return err;
472
473 /* setup key of "save" link */
474 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
475 key.k_objectid = INODE_PKEY(inode)->k_objectid;
476 if (!truncate) {
477 /* unlink, rmdir, rename */
478 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
479 1 + inode->i_sb->s_blocksize);
480 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
481 } else {
482 /* truncate */
483 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
484 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
485 }
486
487 if ((truncate &&
488 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
489 (!truncate &&
490 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
491 /* don't take quota bytes from anywhere */
492 reiserfs_delete_solid_item(&th, NULL, &key);
493 if (!truncate) {
494 reiserfs_release_objectid(&th, inode->i_ino);
495 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
496 } else
497 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
498
499 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500}
501
David Howellsedc666e2006-10-11 01:22:14 -0700502static void reiserfs_kill_sb(struct super_block *s)
503{
504 if (REISERFS_SB(s)) {
Al Viro672fe152013-08-05 17:37:37 +0400505 reiserfs_proc_info_done(s);
Jeff Mahoneya9e36da2011-12-21 21:18:43 +0100506 /*
507 * Force any pending inode evictions to occur now. Any
508 * inodes to be removed that have extended attributes
509 * associated with them need to clean them up before
510 * we can release the extended attribute root dentries.
511 * shrink_dcache_for_umount will BUG if we don't release
512 * those before it's called so ->put_super is too late.
513 */
514 shrink_dcache_sb(s);
515
516 dput(REISERFS_SB(s)->xattr_root);
517 REISERFS_SB(s)->xattr_root = NULL;
518 dput(REISERFS_SB(s)->priv_root);
519 REISERFS_SB(s)->priv_root = NULL;
David Howellsedc666e2006-10-11 01:22:14 -0700520 }
521
522 kill_block_super(s);
523}
524
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700525static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700527 struct reiserfs_transaction_handle th;
528 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400530 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
531
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200532 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200533
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700534 /* change file system state to current state if it was mounted with read-write permissions */
535 if (!(s->s_flags & MS_RDONLY)) {
536 if (!journal_begin(&th, s, 10)) {
537 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
538 1);
539 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
540 REISERFS_SB(s)->s_mount_state);
541 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
542 }
543 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700545 /* note, journal_release checks for readonly mount, and can decide not
546 ** to do a journal_end
547 */
548 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
Jeff Mahoney50652272006-09-30 23:28:44 -0700550 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700552 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700554 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700556 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400557 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700558 REISERFS_SB(s)->reserved_blocks);
559 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200561 reiserfs_write_unlock(s);
562 mutex_destroy(&REISERFS_SB(s)->lock);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700563 kfree(s->s_fs_info);
564 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565}
566
Christoph Lametere18b8902006-12-06 20:33:20 -0800567static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
569static struct inode *reiserfs_alloc_inode(struct super_block *sb)
570{
571 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700572 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800573 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 if (!ei)
575 return NULL;
Al Viro0e4f6a72010-07-04 12:18:57 +0400576 atomic_set(&ei->openers, 0);
577 mutex_init(&ei->tailpack);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 return &ei->vfs_inode;
579}
580
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100581static void reiserfs_i_callback(struct rcu_head *head)
582{
583 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100584 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
585}
586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587static void reiserfs_destroy_inode(struct inode *inode)
588{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100589 call_rcu(&inode->i_rcu, reiserfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590}
591
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700592static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700594 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
Christoph Lametera35afb82007-05-16 22:10:57 -0700596 INIT_LIST_HEAD(&ei->i_prealloc_list);
597 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600static int init_inodecache(void)
601{
602 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700603 sizeof(struct
604 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800605 0, (SLAB_RECLAIM_ACCOUNT|
606 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900607 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 if (reiserfs_inode_cachep == NULL)
609 return -ENOMEM;
610 return 0;
611}
612
613static void destroy_inodecache(void)
614{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000615 /*
616 * Make sure all delayed rcu free inodes are flushed before we
617 * destroy cache.
618 */
619 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700620 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621}
622
623/* we don't mark inodes dirty, we just log them */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400624static void reiserfs_dirty_inode(struct inode *inode, int flags)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700625{
626 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700628 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200629
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700630 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400631 reiserfs_warning(inode->i_sb, "clm-6006",
632 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700633 inode->i_ino);
634 return;
635 }
Jeff Mahoney278f6672013-08-08 17:34:46 -0400636 reiserfs_write_lock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700638 /* this is really only used for atime updates, so they don't have
639 ** to be included in O_SYNC or fsync
640 */
641 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200642 if (err)
643 goto out;
644
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700645 reiserfs_update_sd(&th, inode);
646 journal_end(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200647
648out:
Jeff Mahoney278f6672013-08-08 17:34:46 -0400649 reiserfs_write_unlock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650}
651
Jan Karac3aa0772011-12-21 20:17:10 +0100652static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
653{
654 struct super_block *s = root->d_sb;
655 struct reiserfs_journal *journal = SB_JOURNAL(s);
656 long opts = REISERFS_SB(s)->s_mount_opt;
657
658 if (opts & (1 << REISERFS_LARGETAIL))
659 seq_puts(seq, ",tails=on");
660 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
661 seq_puts(seq, ",notail");
662 /* tails=small is default so we don't show it */
663
664 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
665 seq_puts(seq, ",barrier=none");
666 /* barrier=flush is default so we don't show it */
667
668 if (opts & (1 << REISERFS_ERROR_CONTINUE))
669 seq_puts(seq, ",errors=continue");
670 else if (opts & (1 << REISERFS_ERROR_PANIC))
671 seq_puts(seq, ",errors=panic");
672 /* errors=ro is default so we don't show it */
673
674 if (opts & (1 << REISERFS_DATA_LOG))
675 seq_puts(seq, ",data=journal");
676 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
677 seq_puts(seq, ",data=writeback");
678 /* data=ordered is default so we don't show it */
679
680 if (opts & (1 << REISERFS_ATTRS))
681 seq_puts(seq, ",attrs");
682
683 if (opts & (1 << REISERFS_XATTRS_USER))
684 seq_puts(seq, ",user_xattr");
685
686 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
687 seq_puts(seq, ",expose_privroot");
688
689 if (opts & (1 << REISERFS_POSIXACL))
690 seq_puts(seq, ",acl");
691
692 if (REISERFS_SB(s)->s_jdev)
693 seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
694
695 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
696 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
697
698#ifdef CONFIG_QUOTA
699 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
700 seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
701 else if (opts & (1 << REISERFS_USRQUOTA))
702 seq_puts(seq, ",usrquota");
703 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
704 seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
705 else if (opts & (1 << REISERFS_GRPQUOTA))
706 seq_puts(seq, ",grpquota");
707 if (REISERFS_SB(s)->s_jquota_fmt) {
708 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
709 seq_puts(seq, ",jqfmt=vfsold");
710 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
711 seq_puts(seq, ",jqfmt=vfsv0");
712 }
713#endif
714
715 /* Block allocator options */
716 if (opts & (1 << REISERFS_NO_BORDER))
717 seq_puts(seq, ",block-allocator=noborder");
718 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
719 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
720 if (opts & (1 << REISERFS_HASHED_RELOCATION))
721 seq_puts(seq, ",block-allocator=hashed_relocation");
722 if (opts & (1 << REISERFS_TEST4))
723 seq_puts(seq, ",block-allocator=test4");
724 show_alloc_options(seq, s);
725 return 0;
726}
727
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700729static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
730 size_t, loff_t);
731static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
732 loff_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733#endif
734
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800735static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700736 .alloc_inode = reiserfs_alloc_inode,
737 .destroy_inode = reiserfs_destroy_inode,
738 .write_inode = reiserfs_write_inode,
739 .dirty_inode = reiserfs_dirty_inode,
Al Viro845a2cc2010-06-07 11:37:37 -0400740 .evict_inode = reiserfs_evict_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700741 .put_super = reiserfs_put_super,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700742 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800743 .freeze_fs = reiserfs_freeze,
744 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700745 .statfs = reiserfs_statfs,
746 .remount_fs = reiserfs_remount,
Jan Karac3aa0772011-12-21 20:17:10 +0100747 .show_options = reiserfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700749 .quota_read = reiserfs_quota_read,
750 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751#endif
752};
753
754#ifdef CONFIG_QUOTA
755#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
756
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757static int reiserfs_write_dquot(struct dquot *);
758static int reiserfs_acquire_dquot(struct dquot *);
759static int reiserfs_release_dquot(struct dquot *);
760static int reiserfs_mark_dquot_dirty(struct dquot *);
761static int reiserfs_write_info(struct super_block *, int);
Jan Karaf00c9e42010-09-15 17:38:58 +0200762static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700764static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700765 .write_dquot = reiserfs_write_dquot,
766 .acquire_dquot = reiserfs_acquire_dquot,
767 .release_dquot = reiserfs_release_dquot,
768 .mark_dirty = reiserfs_mark_dquot_dirty,
769 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100770 .alloc_dquot = dquot_alloc,
771 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772};
773
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700774static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700775 .quota_on = reiserfs_quota_on,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400776 .quota_off = dquot_quota_off,
777 .quota_sync = dquot_quota_sync,
778 .get_info = dquot_get_dqinfo,
779 .set_info = dquot_set_dqinfo,
780 .get_dqblk = dquot_get_dqblk,
781 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782};
783#endif
784
Christoph Hellwig39655162007-10-21 16:42:17 -0700785static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700786 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700787 .fh_to_dentry = reiserfs_fh_to_dentry,
788 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700789 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700790};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
792/* this struct is used in reiserfs_getopt () for containing the value for those
793 mount options that have values rather than being toggles. */
794typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700795 char *value;
796 int setmask; /* bitmask which is to set on mount_options bitmask when this
797 value is found, 0 is no bits are to be changed. */
798 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
799 value is found, 0 is no bits are to be changed. This is
800 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801} arg_desc_t;
802
803/* Set this bit in arg_required to allow empty arguments */
804#define REISERFS_OPT_ALLOWEMPTY 31
805
806/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
807 mount options */
808typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700809 char *option_name;
810 int arg_required; /* 0 if argument is not required, not 0 otherwise */
811 const arg_desc_t *values; /* list of values accepted by an option */
812 int setmask; /* bitmask which is to set on mount_options bitmask when this
813 value is found, 0 is no bits are to be changed. */
814 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
815 value is found, 0 is no bits are to be changed. This is
816 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817} opt_desc_t;
818
819/* possible values for -o data= */
820static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700821 {"ordered", 1 << REISERFS_DATA_ORDERED,
822 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
823 {"journal", 1 << REISERFS_DATA_LOG,
824 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
825 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
826 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800827 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828};
829
830/* possible values for -o barrier= */
831static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700832 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
833 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800834 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835};
836
837/* possible values for "-o block-allocator=" and bits which are to be set in
838 s_mount_opt of reiserfs specific part of in-core super block */
839static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700840 {"noborder", 1 << REISERFS_NO_BORDER, 0},
841 {"border", 0, 1 << REISERFS_NO_BORDER},
842 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
843 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
844 {"test4", 1 << REISERFS_TEST4, 0},
845 {"notest4", 0, 1 << REISERFS_TEST4},
846 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847};
848
849static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700850 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
851 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
852 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
853 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854};
855
856static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700857 {"panic", 1 << REISERFS_ERROR_PANIC,
858 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
859 {"ro-remount", 1 << REISERFS_ERROR_RO,
860 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700862 {"continue", 1 << REISERFS_ERROR_CONTINUE,
863 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700865 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866};
867
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868/* proceed only one option from a list *cur - string containing of mount options
869 opts - array of options which are accepted
870 opt_arg - if option is found and requires an argument and if it is specifed
871 in the input - pointer to the argument is stored here
872 bit_flags - if option requires to set a certain bit - it is set here
873 return -1 if unknown option is found, opt->arg_required otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700874static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
875 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700877 char *p;
Jeff Mahoney0222e652009-03-30 14:02:44 -0400878 /* foo=bar,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700879 ^ ^ ^
880 | | +-- option_end
881 | +-- arg_start
882 +-- option_start
883 */
884 const opt_desc_t *opt;
885 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700887 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700889 /* assume argument cannot contain commas */
890 *cur = strchr(p, ',');
891 if (*cur) {
892 *(*cur) = '\0';
893 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700896 if (!strncmp(p, "alloc=", 6)) {
897 /* Ugly special case, probably we should redo options parser so that
898 it can understand several arguments for some options, also so that
899 it can fill several bitfields with option values. */
900 if (reiserfs_parse_alloc_options(s, p + 6)) {
901 return -1;
902 } else {
903 return 0;
904 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700906
907 /* for every option in the list */
908 for (opt = opts; opt->option_name; opt++) {
909 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
910 if (bit_flags) {
911 if (opt->clrmask ==
912 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400913 reiserfs_warning(s, "super-6500",
914 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700915 p);
916 else
917 *bit_flags &= ~opt->clrmask;
918 if (opt->setmask ==
919 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400920 reiserfs_warning(s, "super-6501",
921 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700922 p);
923 else
924 *bit_flags |= opt->setmask;
925 }
926 break;
927 }
928 }
929 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400930 reiserfs_warning(s, "super-6502",
931 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700932 return -1;
933 }
934
935 p += strlen(opt->option_name);
936 switch (*p) {
937 case '=':
938 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400939 reiserfs_warning(s, "super-6503",
940 "the option \"%s\" does not "
941 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700942 opt->option_name);
943 return -1;
944 }
945 break;
946
947 case 0:
948 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400949 reiserfs_warning(s, "super-6504",
950 "the option \"%s\" requires an "
951 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700952 return -1;
953 }
954 break;
955 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400956 reiserfs_warning(s, "super-6505",
957 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700958 opt->option_name);
959 return -1;
960 }
961
962 /* move to the argument, or to next option if argument is not required */
963 p++;
964
965 if (opt->arg_required
966 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
967 && !strlen(p)) {
968 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400969 reiserfs_warning(s, "super-6506",
970 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700971 opt->option_name);
972 return -1;
973 }
974
975 if (!opt->values) {
976 /* *=NULLopt_arg contains pointer to argument */
977 *opt_arg = p;
978 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
979 }
980
981 /* values possible for this option are listed in opt->values */
982 for (arg = opt->values; arg->value; arg++) {
983 if (!strcmp(p, arg->value)) {
984 if (bit_flags) {
985 *bit_flags &= ~arg->clrmask;
986 *bit_flags |= arg->setmask;
987 }
988 return opt->arg_required;
989 }
990 }
991
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400992 reiserfs_warning(s, "super-6506",
993 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700994 opt->option_name);
995 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996}
997
998/* returns 0 if something is wrong in option string, 1 - otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700999static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
1000 unsigned long *mount_options,
1001 /* after the parsing phase, contains the
1002 collection of bitflags defining what
1003 mount options were selected. */
1004 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
1005 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001006 unsigned int *commit_max_age,
1007 char **qf_names,
1008 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001010 int c;
1011 char *arg = NULL;
1012 char *pos;
1013 opt_desc_t opts[] = {
1014 /* Compatibility stuff, so that -o notail for old setups still work */
1015 {"tails",.arg_required = 't',.values = tails},
1016 {"notail",.clrmask =
1017 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1018 {"conv",.setmask = 1 << REISERFS_CONVERT},
1019 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1020 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -04001021 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001023 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1024 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001026 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1027 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028#endif
1029#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001030 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1031 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001033 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1034 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001036 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001037 {"replayonly",.setmask = 1 << REPLAYONLY},
1038 {"block-allocator",.arg_required = 'a',.values = balloc},
1039 {"data",.arg_required = 'd',.values = logging_mode},
1040 {"barrier",.arg_required = 'b',.values = barrier_mode},
1041 {"resize",.arg_required = 'r',.values = NULL},
1042 {"jdev",.arg_required = 'j',.values = NULL},
1043 {"nolargeio",.arg_required = 'w',.values = NULL},
1044 {"commit",.arg_required = 'c',.values = NULL},
Jan Karac3aa0772011-12-21 20:17:10 +01001045 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1046 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1047 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001048 {"errors",.arg_required = 'e',.values = error_actions},
1049 {"usrjquota",.arg_required =
1050 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1051 {"grpjquota",.arg_required =
1052 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1053 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001054 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001055 };
1056
1057 *blocks = 0;
1058 if (!options || !*options)
1059 /* use default configuration: create tails, journaling on, no
1060 conversion to newest format */
1061 return 1;
1062
1063 for (pos = options; pos;) {
1064 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1065 if (c == -1)
1066 /* wrong option is given */
1067 return 0;
1068
1069 if (c == 'r') {
1070 char *p;
1071
1072 p = NULL;
1073 /* "resize=NNN" or "resize=auto" */
1074
1075 if (!strcmp(arg, "auto")) {
1076 /* From JFS code, to auto-get the size. */
1077 *blocks =
1078 s->s_bdev->bd_inode->i_size >> s->
1079 s_blocksize_bits;
1080 } else {
1081 *blocks = simple_strtoul(arg, &p, 0);
1082 if (*p != '\0') {
1083 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001084 reiserfs_warning(s, "super-6507",
1085 "bad value %s for "
1086 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001087 return 0;
1088 }
1089 }
1090 }
1091
1092 if (c == 'c') {
1093 char *p = NULL;
1094 unsigned long val = simple_strtoul(arg, &p, 0);
1095 /* commit=NNN (time in seconds) */
1096 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001097 reiserfs_warning(s, "super-6508",
1098 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001099 arg);
1100 return 0;
1101 }
1102 *commit_max_age = (unsigned int)val;
1103 }
1104
1105 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001106 reiserfs_warning(s, "super-6509", "nolargeio option "
1107 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -07001108 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001109 }
1110
1111 if (c == 'j') {
1112 if (arg && *arg && jdev_name) {
1113 if (*jdev_name) { //Hm, already assigned?
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001114 reiserfs_warning(s, "super-6510",
1115 "journal device was "
1116 "already specified to "
1117 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001118 return 0;
1119 }
1120 *jdev_name = arg;
1121 }
1122 }
1123#ifdef CONFIG_QUOTA
1124 if (c == 'u' || c == 'g') {
1125 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1126
Jan Kara6929f892008-08-20 18:16:36 +02001127 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001128 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001129 reiserfs_warning(s, "super-6511",
1130 "cannot change journaled "
1131 "quota options when quota "
1132 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001133 return 0;
1134 }
1135 if (*arg) { /* Some filename specified? */
1136 if (REISERFS_SB(s)->s_qf_names[qtype]
1137 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1138 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001139 reiserfs_warning(s, "super-6512",
1140 "%s quota file "
1141 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001142 QTYPE2NAME(qtype));
1143 return 0;
1144 }
1145 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001146 reiserfs_warning(s, "super-6513",
1147 "quotafile must be "
1148 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001149 return 0;
1150 }
Ionut-Gabriel Raduaf591ad2013-03-10 15:06:23 +02001151 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001152 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001153 reiserfs_warning(s, "reiserfs-2502",
1154 "not enough memory "
1155 "for storing "
1156 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001157 return 0;
1158 }
Jan Karac3aa0772011-12-21 20:17:10 +01001159 if (qtype == USRQUOTA)
1160 *mount_options |= 1 << REISERFS_USRQUOTA;
1161 else
1162 *mount_options |= 1 << REISERFS_GRPQUOTA;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001163 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001164 if (qf_names[qtype] !=
1165 REISERFS_SB(s)->s_qf_names[qtype])
1166 kfree(qf_names[qtype]);
1167 qf_names[qtype] = NULL;
Jan Karac3aa0772011-12-21 20:17:10 +01001168 if (qtype == USRQUOTA)
1169 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1170 else
1171 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001172 }
1173 }
1174 if (c == 'f') {
1175 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001176 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001177 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001178 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001179 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001180 reiserfs_warning(s, "super-6514",
1181 "unknown quota format "
1182 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001183 return 0;
1184 }
Jan Kara6929f892008-08-20 18:16:36 +02001185 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001186 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001187 reiserfs_warning(s, "super-6515",
1188 "cannot change journaled "
1189 "quota options when quota "
1190 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001191 return 0;
1192 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001193 }
1194#else
1195 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001196 reiserfs_warning(s, "reiserfs-2503", "journaled "
1197 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001198 return 0;
1199 }
1200#endif
1201 }
1202
1203#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001204 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1205 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001206 reiserfs_warning(s, "super-6515",
1207 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001208 return 0;
1209 }
Jan Karac3aa0772011-12-21 20:17:10 +01001210 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1211 sb_has_quota_loaded(s, USRQUOTA)) ||
1212 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1213 sb_has_quota_loaded(s, GRPQUOTA))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001214 reiserfs_warning(s, "super-6516", "quota options must "
1215 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001216 return 0;
1217 }
1218#endif
1219
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221}
1222
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001223static void switch_data_mode(struct super_block *s, unsigned long mode)
1224{
1225 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1226 (1 << REISERFS_DATA_ORDERED) |
1227 (1 << REISERFS_DATA_WRITEBACK));
1228 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229}
1230
1231static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1232{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001233 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1234 if (!reiserfs_data_log(s)) {
1235 switch_data_mode(s, REISERFS_DATA_LOG);
1236 reiserfs_info(s, "switching to journaled data mode\n");
1237 }
1238 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1239 if (!reiserfs_data_ordered(s)) {
1240 switch_data_mode(s, REISERFS_DATA_ORDERED);
1241 reiserfs_info(s, "switching to ordered data mode\n");
1242 }
1243 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1244 if (!reiserfs_data_writeback(s)) {
1245 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1246 reiserfs_info(s, "switching to writeback data mode\n");
1247 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249}
1250
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001251static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001253 int flush = (1 << REISERFS_BARRIER_FLUSH);
1254 int none = (1 << REISERFS_BARRIER_NONE);
1255 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001257 if (bits & all_barrier) {
1258 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1259 if (bits & flush) {
1260 REISERFS_SB(s)->s_mount_opt |= flush;
1261 printk("reiserfs: enabling write barrier flush mode\n");
1262 } else if (bits & none) {
1263 REISERFS_SB(s)->s_mount_opt |= none;
1264 printk("reiserfs: write barriers turned off\n");
1265 }
1266 }
1267}
1268
1269static void handle_attrs(struct super_block *s)
1270{
1271 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1272
1273 if (reiserfs_attrs(s)) {
1274 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001275 reiserfs_warning(s, "super-6517", "cannot support "
1276 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001277 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 return;
1279 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001280 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001281 reiserfs_warning(s, "super-6518", "cannot support "
1282 "attributes until flag is set in "
1283 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001284 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 }
1286 }
1287}
1288
Jan Kara00b44192008-07-25 01:46:38 -07001289#ifdef CONFIG_QUOTA
1290static void handle_quota_files(struct super_block *s, char **qf_names,
1291 unsigned int *qfmt)
1292{
1293 int i;
1294
1295 for (i = 0; i < MAXQUOTAS; i++) {
1296 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1297 kfree(REISERFS_SB(s)->s_qf_names[i]);
1298 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1299 }
Jan Karaa06d7892011-12-21 17:35:34 +01001300 if (*qfmt)
1301 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
Jan Kara00b44192008-07-25 01:46:38 -07001302}
1303#endif
1304
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001305static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001307 struct reiserfs_super_block *rs;
1308 struct reiserfs_transaction_handle th;
1309 unsigned long blocks;
1310 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1311 unsigned long safe_mask = 0;
1312 unsigned int commit_max_age = (unsigned int)-1;
1313 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001314 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001315 int err;
Jan Kara00b44192008-07-25 01:46:38 -07001316 char *qf_names[MAXQUOTAS];
1317 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001319 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001320#endif
Jan Kara00b44192008-07-25 01:46:38 -07001321
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001322 reiserfs_write_lock(s);
1323
1324#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001325 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326#endif
1327
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001328 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001330 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001331 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1332 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001334 for (i = 0; i < MAXQUOTAS; i++)
1335 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1336 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001337#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001338 err = -EINVAL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04001339 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 }
Jan Kara00b44192008-07-25 01:46:38 -07001341#ifdef CONFIG_QUOTA
1342 handle_quota_files(s, qf_names, &qfmt);
1343#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001345 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001347 /* Add options that are safe here */
1348 safe_mask |= 1 << REISERFS_SMALLTAIL;
1349 safe_mask |= 1 << REISERFS_LARGETAIL;
1350 safe_mask |= 1 << REISERFS_NO_BORDER;
1351 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1352 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1353 safe_mask |= 1 << REISERFS_TEST4;
1354 safe_mask |= 1 << REISERFS_ATTRS;
1355 safe_mask |= 1 << REISERFS_XATTRS_USER;
1356 safe_mask |= 1 << REISERFS_POSIXACL;
1357 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1358 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1359 safe_mask |= 1 << REISERFS_ERROR_RO;
1360 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1361 safe_mask |= 1 << REISERFS_ERROR_PANIC;
Jan Karac3aa0772011-12-21 20:17:10 +01001362 safe_mask |= 1 << REISERFS_USRQUOTA;
1363 safe_mask |= 1 << REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001365 /* Update the bitmask, taking care to keep
1366 * the bits we're not allowed to change here */
1367 REISERFS_SB(s)->s_mount_opt =
1368 (REISERFS_SB(s)->
1369 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001371 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1372 journal->j_max_commit_age = commit_max_age;
1373 journal->j_max_trans_age = commit_max_age;
1374 } else if (commit_max_age == 0) {
1375 /* 0 means restore defaults. */
1376 journal->j_max_commit_age = journal->j_default_max_commit_age;
1377 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1378 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001380 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001381 err = reiserfs_resize(s, blocks);
1382 if (err != 0)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001383 goto out_err_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001384 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001386 if (*mount_flags & MS_RDONLY) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001387 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001388 reiserfs_xattr_init(s, *mount_flags);
1389 /* remount read-only */
1390 if (s->s_flags & MS_RDONLY)
1391 /* it is read-only already */
Jeff Mahoney4c051412013-08-08 17:27:19 -04001392 goto out_ok_unlocked;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001393
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001394 err = dquot_suspend(s, -1);
1395 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001396 goto out_err;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001397
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001398 /* try to remount file system with read-only permissions */
1399 if (sb_umount_state(rs) == REISERFS_VALID_FS
1400 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001401 goto out_ok_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001402 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403
Jeff Mahoney4c051412013-08-08 17:27:19 -04001404 reiserfs_write_lock(s);
1405
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001406 err = journal_begin(&th, s, 10);
1407 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001408 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001410 /* Mounting a rw partition read-only. */
1411 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1412 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1413 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1414 } else {
1415 /* remount read-write */
1416 if (!(s->s_flags & MS_RDONLY)) {
Jeff Mahoney4c051412013-08-08 17:27:19 -04001417 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001418 reiserfs_xattr_init(s, *mount_flags);
Jeff Mahoney4c051412013-08-08 17:27:19 -04001419 goto out_ok_unlocked; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001420 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001422 if (reiserfs_is_journal_aborted(journal)) {
1423 err = journal->j_errno;
Jeff Mahoney4c051412013-08-08 17:27:19 -04001424 goto out_err_unlock;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001425 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001427 handle_data_mode(s, mount_options);
1428 handle_barrier_mode(s, mount_options);
1429 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1430 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1431 err = journal_begin(&th, s, 10);
1432 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001433 goto out_err_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001435 /* Mount a partition which is read-only, read-write */
1436 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1437 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1438 s->s_flags &= ~MS_RDONLY;
1439 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001440 if (!old_format_only(s))
1441 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001442 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1443 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1444 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1445 }
1446 /* this will force a full flush of all journal lists */
1447 SB_JOURNAL(s)->j_must_wait = 1;
1448 err = journal_end(&th, s, 10);
1449 if (err)
Jeff Mahoney4c051412013-08-08 17:27:19 -04001450 goto out_err_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001451
Jeff Mahoney4c051412013-08-08 17:27:19 -04001452 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001453 if (!(*mount_flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001454 dquot_resume(s, -1);
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001455 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001456 finish_unfinished(s);
Jeff Mahoney4c051412013-08-08 17:27:19 -04001457 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001458 reiserfs_xattr_init(s, *mount_flags);
1459 }
1460
Jeff Mahoney4c051412013-08-08 17:27:19 -04001461out_ok_unlocked:
Al Viro2a32ceb2009-05-08 16:05:57 -04001462 replace_mount_options(s, new_opts);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001463 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001464
Jeff Mahoney4c051412013-08-08 17:27:19 -04001465out_err_unlock:
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001466 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001467out_err:
1468 kfree(new_opts);
1469 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470}
1471
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001472static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001474 struct buffer_head *bh;
1475 struct reiserfs_super_block *rs;
1476 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001478 bh = sb_bread(s, offset / s->s_blocksize);
1479 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001480 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001481 "bread failed (dev %s, block %lu, size %lu)",
1482 reiserfs_bdevname(s), offset / s->s_blocksize,
1483 s->s_blocksize);
1484 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001487 rs = (struct reiserfs_super_block *)bh->b_data;
1488 if (!is_any_reiserfs_magic_string(rs)) {
1489 brelse(bh);
1490 return 1;
1491 }
1492 //
1493 // ok, reiserfs signature (old or new) found in at the given offset
Jeff Mahoney0222e652009-03-30 14:02:44 -04001494 //
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001495 fs_blocksize = sb_blocksize(rs);
1496 brelse(bh);
1497 sb_set_blocksize(s, fs_blocksize);
1498
1499 bh = sb_bread(s, offset / s->s_blocksize);
1500 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001501 reiserfs_warning(s, "sh-2007",
1502 "bread failed (dev %s, block %lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001503 reiserfs_bdevname(s), offset / s->s_blocksize,
1504 s->s_blocksize);
1505 return 1;
1506 }
1507
1508 rs = (struct reiserfs_super_block *)bh->b_data;
1509 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001510 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1511 "filesystem on (dev %s, block %Lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001512 reiserfs_bdevname(s),
1513 (unsigned long long)bh->b_blocknr,
1514 s->s_blocksize);
1515 brelse(bh);
1516 return 1;
1517 }
1518
1519 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1520 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001521 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1522 "--rebuild-tree run detected. Please run\n"
1523 "reiserfsck --rebuild-tree and wait for a "
1524 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001525 "get newer reiserfsprogs package");
1526 return 1;
1527 }
1528
1529 SB_BUFFER_WITH_SB(s) = bh;
1530 SB_DISK_SUPER_BLOCK(s) = rs;
1531
1532 if (is_reiserfs_jr(rs)) {
1533 /* magic is of non-standard journal filesystem, look at s_version to
1534 find which format is in use */
1535 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001536 reiserfs_info(s, "found reiserfs format \"3.6\""
1537 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001538 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001539 reiserfs_info(s, "found reiserfs format \"3.5\""
1540 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001541 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001542 reiserfs_warning(s, "sh-2012", "found unknown "
1543 "format \"%u\" of reiserfs with "
1544 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001545 return 1;
1546 }
1547 } else
1548 /* s_version of standard format may contain incorrect information,
1549 so we just look at the magic string */
1550 reiserfs_info(s,
1551 "found reiserfs format \"%s\" with standard journal\n",
1552 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1553
1554 s->s_op = &reiserfs_sops;
1555 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001557 s->s_qcop = &reiserfs_qctl_operations;
1558 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559#endif
1560
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001561 /* new format is limited by the 32 bit wide i_blocks field, want to
1562 ** be one full block below that.
1563 */
1564 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1565 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566}
1567
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001569static int reread_meta_blocks(struct super_block *s)
1570{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001571 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1572 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1573 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001574 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001575 return 1;
1576 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001578 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579}
1580
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581/////////////////////////////////////////////////////
1582// hash detection stuff
1583
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584// if root directory is empty - we set default - Yura's - hash and
1585// warn about it
1586// FIXME: we look for only one name in a directory. If tea and yura
1587// bith have the same value - we ask user to send report to the
1588// mailing list
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001589static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001591 int retval;
1592 struct inode *inode;
1593 struct cpu_key key;
1594 INITIALIZE_PATH(path);
1595 struct reiserfs_dir_entry de;
1596 __u32 hash = DEFAULT_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001598 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001600 do { // Some serious "goto"-hater was there ;)
1601 u32 teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001603 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1604 retval = search_by_entry_key(s, &key, &path, &de);
1605 if (retval == IO_ERROR) {
1606 pathrelse(&path);
1607 return UNSET_HASH;
1608 }
1609 if (retval == NAME_NOT_FOUND)
1610 de.de_entry_num--;
1611 set_de_name_and_namelen(&de);
1612 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1613 /* allow override in this case */
1614 if (reiserfs_rupasov_hash(s)) {
1615 hash = YURA_HASH;
1616 }
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001617 reiserfs_info(s, "FS seems to be empty, autodetect "
1618 "is using the default hash\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001619 break;
1620 }
1621 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1622 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1623 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1624 if (((teahash == r5hash)
1625 &&
1626 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1627 == r5hash)) || ((teahash == yurahash)
1628 && (yurahash ==
1629 GET_HASH_VALUE(deh_offset
1630 (&
1631 (de.
1632 de_deh[de.
1633 de_entry_num])))))
1634 || ((r5hash == yurahash)
1635 && (yurahash ==
1636 GET_HASH_VALUE(deh_offset
1637 (&(de.de_deh[de.de_entry_num])))))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001638 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1639 "automatically detect hash function. "
1640 "Please mount with -o "
1641 "hash={tea,rupasov,r5}");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001642 hash = UNSET_HASH;
1643 break;
1644 }
1645 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1646 yurahash)
1647 hash = YURA_HASH;
1648 else if (GET_HASH_VALUE
1649 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1650 hash = TEA_HASH;
1651 else if (GET_HASH_VALUE
1652 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1653 hash = R5_HASH;
1654 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001655 reiserfs_warning(s, "reiserfs-2506",
1656 "Unrecognised hash function");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001657 hash = UNSET_HASH;
1658 }
1659 } while (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001661 pathrelse(&path);
1662 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663}
1664
1665// finds out which hash names are sorted with
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001666static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001668 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001670 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001672 /* reiserfs_hash_detect() == true if any of the hash mount options
1673 ** were used. We must check them to make sure the user isn't
1674 ** using a bad hash value
1675 */
1676 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1677 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001679 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney0222e652009-03-30 14:02:44 -04001680 /* detection has found the hash, and we must check against the
1681 ** mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001682 */
1683 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001684 reiserfs_warning(s, "reiserfs-2507",
1685 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001686 "unable to force rupasov hash",
1687 reiserfs_hashname(code));
1688 code = UNSET_HASH;
1689 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001690 reiserfs_warning(s, "reiserfs-2508",
1691 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001692 "unable to force tea hash",
1693 reiserfs_hashname(code));
1694 code = UNSET_HASH;
1695 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001696 reiserfs_warning(s, "reiserfs-2509",
1697 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001698 "unable to force r5 hash",
1699 reiserfs_hashname(code));
1700 code = UNSET_HASH;
1701 }
1702 } else {
1703 /* find_hash_out was not called or could not determine the hash */
1704 if (reiserfs_rupasov_hash(s)) {
1705 code = YURA_HASH;
1706 } else if (reiserfs_tea_hash(s)) {
1707 code = TEA_HASH;
1708 } else if (reiserfs_r5_hash(s)) {
1709 code = R5_HASH;
1710 }
1711 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712
Jeff Mahoney0222e652009-03-30 14:02:44 -04001713 /* if we are mounted RW, and we have a new valid hash code, update
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001714 ** the super
1715 */
1716 if (code != UNSET_HASH &&
1717 !(s->s_flags & MS_RDONLY) &&
1718 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1719 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1720 }
1721 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722}
1723
1724// return pointer to appropriate function
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001725static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001727 switch (what_hash(s)) {
1728 case TEA_HASH:
1729 reiserfs_info(s, "Using tea hash to sort names\n");
1730 return keyed_hash;
1731 case YURA_HASH:
1732 reiserfs_info(s, "Using rupasov hash to sort names\n");
1733 return yura_hash;
1734 case R5_HASH:
1735 reiserfs_info(s, "Using r5 hash to sort names\n");
1736 return r5_hash;
1737 }
1738 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739}
1740
1741// this is used to set up correct value for old partitions
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001742static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001744 if (func == keyed_hash)
1745 return TEA_HASH;
1746 if (func == yura_hash)
1747 return YURA_HASH;
1748 if (func == r5_hash)
1749 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001751 BUG(); // should never happen
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001753 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754}
1755
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001756#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001758 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001760static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001762 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001763 struct reiserfs_transaction_handle th;
1764 int old_format = 0;
1765 unsigned long blocks;
1766 unsigned int commit_max_age = 0;
1767 int jinit_done = 0;
1768 struct reiserfs_iget_args args;
1769 struct reiserfs_super_block *rs;
1770 char *jdev_name;
1771 struct reiserfs_sb_info *sbi;
1772 int errval = -EINVAL;
Jan Kara00b44192008-07-25 01:46:38 -07001773 char *qf_names[MAXQUOTAS] = {};
1774 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001776 save_mount_options(s, data);
1777
Yan Burman01afb212006-12-06 20:39:01 -08001778 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001779 if (!sbi)
1780 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001781 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001782 /* Set default values for options: non-aggressive tails, RO on errors */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001783 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1784 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1785 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001786 /* no preallocation minimum, be smart in
1787 reiserfs_file_write instead */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001788 sbi->s_alloc_options.preallocmin = 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001789 /* Preallocate by 16 blocks (17-1) at once */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001790 sbi->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001791 /* setup default block allocator options */
1792 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793
Artem Bityutskiy033369d2012-06-01 17:18:08 +03001794 spin_lock_init(&sbi->old_work_lock);
1795 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001796 mutex_init(&sbi->lock);
1797 sbi->lock_depth = -1;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001798
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001799 jdev_name = NULL;
1800 if (reiserfs_parse_options
1801 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001802 &commit_max_age, qf_names, &qfmt) == 0) {
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001803 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001804 }
Jan Karac3aa0772011-12-21 20:17:10 +01001805 if (jdev_name && jdev_name[0]) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001806 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1807 if (!sbi->s_jdev) {
Jan Karac3aa0772011-12-21 20:17:10 +01001808 SWARN(silent, s, "", "Cannot allocate memory for "
1809 "journal device name");
1810 goto error;
1811 }
1812 }
Jan Kara00b44192008-07-25 01:46:38 -07001813#ifdef CONFIG_QUOTA
1814 handle_quota_files(s, qf_names, &qfmt);
1815#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001817 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001818 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001819 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001820 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001822 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1823 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1824 old_format = 1;
1825 /* try new format (64-th 1k block), which can contain reiserfs super block */
1826 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001827 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001828 reiserfs_bdevname(s));
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001829 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001830 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001832 rs = SB_DISK_SUPER_BLOCK(s);
1833 /* Let's do basic sanity check to verify that underlying device is not
1834 smaller than the filesystem. If the check fails then abort and scream,
1835 because bad stuff will happen otherwise. */
1836 if (s->s_bdev && s->s_bdev->bd_inode
1837 && i_size_read(s->s_bdev->bd_inode) <
1838 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001839 SWARN(silent, s, "", "Filesystem cannot be "
1840 "mounted because it is bigger than the device");
1841 SWARN(silent, s, "", "You may need to run fsck "
1842 "or increase size of your LVM partition");
1843 SWARN(silent, s, "", "Or may be you forgot to "
1844 "reboot after fdisk when it told you to");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001845 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001846 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001848 sbi->s_mount_state = SB_REISERFS_STATE(s);
1849 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850
Jeff Mahoney6f010462006-09-30 23:28:43 -07001851 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001852 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001853 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001854 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001855
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001856 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001858 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1859 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860#endif
1861
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001862 /* make data=ordered the default */
1863 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1864 !reiserfs_data_writeback(s)) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001865 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 }
1867
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001868 if (reiserfs_data_log(s)) {
1869 reiserfs_info(s, "using journaled data mode\n");
1870 } else if (reiserfs_data_ordered(s)) {
1871 reiserfs_info(s, "using ordered data mode\n");
1872 } else {
1873 reiserfs_info(s, "using writeback data mode\n");
1874 }
1875 if (reiserfs_barrier_flush(s)) {
1876 printk("reiserfs: using flush barriers\n");
1877 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001878
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08001879 // set_device_ro(s->s_dev, 1) ;
1880 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1881 SWARN(silent, s, "sh-2022",
1882 "unable to initialize journal space");
1883 goto error_unlocked;
1884 } else {
1885 jinit_done = 1; /* once this is set, journal_release must be called
1886 ** if we error out of the mount
1887 */
1888 }
1889
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001890 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001891 SWARN(silent, s, "jmacd-9",
1892 "unable to reread meta blocks after journal init");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001893 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 }
1895
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001896 if (replay_only(s))
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001897 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001898
1899 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001900 SWARN(silent, s, "clm-7000",
1901 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001902 s->s_flags |= MS_RDONLY;
1903 }
1904 args.objectid = REISERFS_ROOT_OBJECTID;
1905 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1906 root_inode =
1907 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1908 reiserfs_init_locked_inode, (void *)(&args));
1909 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001910 SWARN(silent, s, "jmacd-10", "get root inode failed");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001911 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912 }
1913
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001914 /*
1915 * This path assumed to be called with the BKL in the old times.
1916 * Now we have inherited the big reiserfs lock from it and many
1917 * reiserfs helpers called in the mount path and elsewhere require
1918 * this lock to be held even if it's not always necessary. Let's be
1919 * conservative and hold it early. The window can be reduced after
1920 * careful review of the code.
1921 */
1922 reiserfs_write_lock(s);
1923
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001924 if (root_inode->i_state & I_NEW) {
1925 reiserfs_read_locked_inode(root_inode, &args);
1926 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 }
1928
Al Viro48fde702012-01-08 22:15:13 -05001929 s->s_root = d_make_root(root_inode);
1930 if (!s->s_root)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001931 goto error;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001932 // define and initialize hash function
1933 sbi->s_hash_function = hash_function(s);
1934 if (sbi->s_hash_function == NULL) {
1935 dput(s->s_root);
1936 s->s_root = NULL;
1937 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001939
1940 if (is_reiserfs_3_5(rs)
1941 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1942 set_bit(REISERFS_3_5, &(sbi->s_properties));
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07001943 else if (old_format)
1944 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001945 else
1946 set_bit(REISERFS_3_6, &(sbi->s_properties));
1947
1948 if (!(s->s_flags & MS_RDONLY)) {
1949
1950 errval = journal_begin(&th, s, 1);
1951 if (errval) {
1952 dput(s->s_root);
1953 s->s_root = NULL;
1954 goto error;
1955 }
1956 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1957
1958 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1959 set_sb_fs_state(rs, 0);
1960
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001961 /* Clear out s_bmap_nr if it would wrap. We can handle this
1962 * case, but older revisions can't. This will cause the
1963 * file system to fail mount on those older implementations,
1964 * avoiding corruption. -jeffm */
1965 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1966 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001967 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001968 "claims to use %u bitmap blocks in "
1969 "its super block, but requires %u. "
1970 "Clearing to zero.", sb_bmap_nr(rs),
1971 reiserfs_bmap_count(s));
1972
1973 set_sb_bmap_nr(rs, 0);
1974 }
1975
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001976 if (old_format_only(s)) {
1977 /* filesystem of format 3.5 either with standard or non-standard
1978 journal */
1979 if (convert_reiserfs(s)) {
1980 /* and -o conv is given */
1981 if (!silent)
1982 reiserfs_info(s,
1983 "converting 3.5 filesystem to the 3.6 format");
1984
1985 if (is_reiserfs_3_5(rs))
1986 /* put magic string of 3.6 format. 2.2 will not be able to
1987 mount this filesystem anymore */
1988 memcpy(rs->s_v1.s_magic,
1989 reiserfs_3_6_magic_string,
1990 sizeof
1991 (reiserfs_3_6_magic_string));
1992
1993 set_sb_version(rs, REISERFS_VERSION_2);
1994 reiserfs_convert_objectid_map_v1(s);
1995 set_bit(REISERFS_3_6, &(sbi->s_properties));
1996 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1997 } else if (!silent) {
1998 reiserfs_info(s, "using 3.5.x disk format\n");
1999 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04002000 } else
2001 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2002
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002003
2004 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
2005 errval = journal_end(&th, s, 1);
2006 if (errval) {
2007 dput(s->s_root);
2008 s->s_root = NULL;
2009 goto error;
2010 }
2011
Jeff Mahoney4c051412013-08-08 17:27:19 -04002012 reiserfs_write_unlock(s);
Al Viroedcc37a2009-05-03 06:00:05 -04002013 if ((errval = reiserfs_lookup_privroot(s)) ||
2014 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002015 dput(s->s_root);
2016 s->s_root = NULL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04002017 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002018 }
Jeff Mahoney4c051412013-08-08 17:27:19 -04002019 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002020
2021 /* look for files which were to be removed in previous session */
2022 finish_unfinished(s);
2023 } else {
2024 if (old_format_only(s) && !silent) {
2025 reiserfs_info(s, "using 3.5.x disk format\n");
2026 }
2027
Jeff Mahoney4c051412013-08-08 17:27:19 -04002028 reiserfs_write_unlock(s);
Al Viroedcc37a2009-05-03 06:00:05 -04002029 if ((errval = reiserfs_lookup_privroot(s)) ||
2030 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002031 dput(s->s_root);
2032 s->s_root = NULL;
Jeff Mahoney4c051412013-08-08 17:27:19 -04002033 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002034 }
Jeff Mahoney4c051412013-08-08 17:27:19 -04002035 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002036 }
2037 // mark hash in super block: it could be unset. overwrite should be ok
2038 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2039
2040 handle_attrs(s);
2041
2042 reiserfs_proc_info_init(s);
2043
2044 init_waitqueue_head(&(sbi->s_wait));
2045 spin_lock_init(&sbi->bitmap_lock);
2046
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02002047 reiserfs_write_unlock(s);
2048
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002049 return (0);
2050
Jan Kara00b44192008-07-25 01:46:38 -07002051error:
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04002052 reiserfs_write_unlock(s);
2053
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002054error_unlocked:
2055 /* kill the commit thread, free journal ram */
2056 if (jinit_done) {
2057 reiserfs_write_lock(s);
2058 journal_release_error(NULL, s);
2059 reiserfs_write_unlock(s);
2060 }
2061
Artem Bityutskiy033369d2012-06-01 17:18:08 +03002062 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
2063
Jeff Mahoney50652272006-09-30 23:28:44 -07002064 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002065 if (SB_BUFFER_WITH_SB(s))
2066 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07002068 {
2069 int j;
Jan Kara00b44192008-07-25 01:46:38 -07002070 for (j = 0; j < MAXQUOTAS; j++)
2071 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002072 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073#endif
James Lamanna833d3042005-10-30 15:00:16 -08002074 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002076 s->s_fs_info = NULL;
2077 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078}
2079
David Howells726c3342006-06-23 02:02:58 -07002080static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081{
David Howells726c3342006-06-23 02:02:58 -07002082 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002083
2084 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2085 buf->f_bfree = sb_free_blocks(rs);
2086 buf->f_bavail = buf->f_bfree;
2087 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07002088 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002089 /* changed to accommodate gcc folks. */
2090 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07002091 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2092 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2093 sizeof(rs->s_uuid)/2);
2094
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002095 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096}
2097
2098#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099static int reiserfs_write_dquot(struct dquot *dquot)
2100{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002101 struct reiserfs_transaction_handle th;
2102 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002103 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002105 reiserfs_write_lock(dquot->dq_sb);
2106 ret =
2107 journal_begin(&th, dquot->dq_sb,
2108 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2109 if (ret)
2110 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002111 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002112 ret = dquot_commit(dquot);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002113 reiserfs_write_lock_nested(dquot->dq_sb, depth);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002114 err =
2115 journal_end(&th, dquot->dq_sb,
2116 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2117 if (!ret && err)
2118 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002119out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002120 reiserfs_write_unlock(dquot->dq_sb);
2121 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122}
2123
2124static int reiserfs_acquire_dquot(struct dquot *dquot)
2125{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002126 struct reiserfs_transaction_handle th;
2127 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002128 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002130 reiserfs_write_lock(dquot->dq_sb);
2131 ret =
2132 journal_begin(&th, dquot->dq_sb,
2133 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2134 if (ret)
2135 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002136 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002137 ret = dquot_acquire(dquot);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002138 reiserfs_write_lock_nested(dquot->dq_sb, depth);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002139 err =
2140 journal_end(&th, dquot->dq_sb,
2141 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2142 if (!ret && err)
2143 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002144out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002145 reiserfs_write_unlock(dquot->dq_sb);
2146 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147}
2148
2149static int reiserfs_release_dquot(struct dquot *dquot)
2150{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002151 struct reiserfs_transaction_handle th;
2152 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002154 reiserfs_write_lock(dquot->dq_sb);
2155 ret =
2156 journal_begin(&th, dquot->dq_sb,
2157 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara7af11682012-11-13 17:05:14 +01002158 reiserfs_write_unlock(dquot->dq_sb);
Jan Kara9c3013e2007-09-11 15:23:29 -07002159 if (ret) {
2160 /* Release dquot anyway to avoid endless cycle in dqput() */
2161 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002162 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07002163 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002164 ret = dquot_release(dquot);
Jan Kara7af11682012-11-13 17:05:14 +01002165 reiserfs_write_lock(dquot->dq_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002166 err =
2167 journal_end(&th, dquot->dq_sb,
2168 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2169 if (!ret && err)
2170 ret = err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002171 reiserfs_write_unlock(dquot->dq_sb);
Jan Kara7af11682012-11-13 17:05:14 +01002172out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002173 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174}
2175
2176static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2177{
Jan Kara45065672008-07-25 01:46:37 -07002178 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002179 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2180 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2181 dquot_mark_dquot_dirty(dquot);
2182 return reiserfs_write_dquot(dquot);
2183 } else
2184 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002185}
2186
2187static int reiserfs_write_info(struct super_block *sb, int type)
2188{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002189 struct reiserfs_transaction_handle th;
2190 int ret, err;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002191 int depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002193 /* Data block + inode block */
2194 reiserfs_write_lock(sb);
2195 ret = journal_begin(&th, sb, 2);
2196 if (ret)
2197 goto out;
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002198 depth = reiserfs_write_unlock_nested(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002199 ret = dquot_commit_info(sb, type);
Jeff Mahoneyd2d03952013-08-08 17:34:47 -04002200 reiserfs_write_lock_nested(sb, depth);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002201 err = journal_end(&th, sb, 2);
2202 if (!ret && err)
2203 ret = err;
Jan Kara7af11682012-11-13 17:05:14 +01002204out:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002205 reiserfs_write_unlock(sb);
2206 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207}
2208
2209/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002210 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211 */
2212static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2213{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002214 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2215 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216}
2217
2218/*
2219 * Standard function to be called on quota_on
2220 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002221static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Jan Karaf00c9e42010-09-15 17:38:58 +02002222 struct path *path)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002224 int err;
Jan Karad5dee5c2008-04-28 02:16:23 -07002225 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002226 struct reiserfs_transaction_handle th;
Jan Karac3aa0772011-12-21 20:17:10 +01002227 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228
Jan Karab9e06ef2012-11-13 16:34:17 +01002229 reiserfs_write_lock(sb);
2230 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2231 err = -EINVAL;
2232 goto out;
2233 }
Christoph Hellwig307ae182010-05-19 07:16:43 -04002234
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002235 /* Quotafile not on the same filesystem? */
Al Virod8c95842011-12-07 18:16:57 -05002236 if (path->dentry->d_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002237 err = -EXDEV;
2238 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002239 }
Jan Karaf00c9e42010-09-15 17:38:58 +02002240 inode = path->dentry->d_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002241 /* We must not pack tails for quota files on reiserfs for quota IO to work */
Jan Karad5dee5c2008-04-28 02:16:23 -07002242 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2243 err = reiserfs_unpack(inode, NULL);
2244 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002245 reiserfs_warning(sb, "super-6520",
2246 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002247 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002248 err = -EINVAL;
2249 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002250 }
2251 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002252 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002253 /* Journaling quota? */
2254 if (REISERFS_SB(sb)->s_qf_names[type]) {
2255 /* Quotafile not of fs root? */
Jan Karaf00c9e42010-09-15 17:38:58 +02002256 if (path->dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002257 reiserfs_warning(sb, "super-6521",
2258 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002259 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002260 }
2261
2262 /*
2263 * When we journal data on quota file, we have to flush journal to see
2264 * all updates to the file when we bypass pagecache...
2265 */
2266 if (reiserfs_file_data_log(inode)) {
2267 /* Just start temporary transaction and finish it */
2268 err = journal_begin(&th, sb, 1);
2269 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002270 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002271 err = journal_end_sync(&th, sb, 1);
2272 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002273 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002274 }
Jan Karab9e06ef2012-11-13 16:34:17 +01002275 reiserfs_write_unlock(sb);
2276 return dquot_quota_on(sb, type, format_id, path);
Al Viro77e69da2008-08-01 04:29:18 -04002277out:
Jan Karab9e06ef2012-11-13 16:34:17 +01002278 reiserfs_write_unlock(sb);
Al Viro77e69da2008-08-01 04:29:18 -04002279 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002280}
2281
2282/* Read data from quotafile - avoid pagecache and such because we cannot afford
2283 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002284 * itself serializes the operations (and no one else should touch the files)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285 * we don't have to be afraid of races */
2286static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2287 size_t len, loff_t off)
2288{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002289 struct inode *inode = sb_dqopt(sb)->files[type];
2290 unsigned long blk = off >> sb->s_blocksize_bits;
2291 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2292 size_t toread;
2293 struct buffer_head tmp_bh, *bh;
2294 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002296 if (off > i_size)
2297 return 0;
2298 if (off + len > i_size)
2299 len = i_size - off;
2300 toread = len;
2301 while (toread > 0) {
2302 tocopy =
2303 sb->s_blocksize - offset <
2304 toread ? sb->s_blocksize - offset : toread;
2305 tmp_bh.b_state = 0;
2306 /* Quota files are without tails so we can safely use this function */
2307 reiserfs_write_lock(sb);
2308 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2309 reiserfs_write_unlock(sb);
2310 if (err)
2311 return err;
2312 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2313 memset(data, 0, tocopy);
2314 else {
2315 bh = sb_bread(sb, tmp_bh.b_blocknr);
2316 if (!bh)
2317 return -EIO;
2318 memcpy(data, bh->b_data + offset, tocopy);
2319 brelse(bh);
2320 }
2321 offset = 0;
2322 toread -= tocopy;
2323 data += tocopy;
2324 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002326 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327}
2328
2329/* Write to quotafile (we know the transaction is already started and has
2330 * enough credits) */
2331static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2332 const char *data, size_t len, loff_t off)
2333{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002334 struct inode *inode = sb_dqopt(sb)->files[type];
2335 unsigned long blk = off >> sb->s_blocksize_bits;
2336 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2337 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2338 size_t towrite = len;
2339 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340
Jan Kara9c3013e2007-09-11 15:23:29 -07002341 if (!current->journal_info) {
2342 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2343 " cancelled because transaction is not started.\n",
2344 (unsigned long long)off, (unsigned long long)len);
2345 return -EIO;
2346 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002347 while (towrite > 0) {
2348 tocopy = sb->s_blocksize - offset < towrite ?
2349 sb->s_blocksize - offset : towrite;
2350 tmp_bh.b_state = 0;
Jan Kara361d94a2012-11-13 18:25:38 +01002351 reiserfs_write_lock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002352 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
Jan Kara361d94a2012-11-13 18:25:38 +01002353 reiserfs_write_unlock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002354 if (err)
2355 goto out;
2356 if (offset || tocopy != sb->s_blocksize)
2357 bh = sb_bread(sb, tmp_bh.b_blocknr);
2358 else
2359 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2360 if (!bh) {
2361 err = -EIO;
2362 goto out;
2363 }
2364 lock_buffer(bh);
2365 memcpy(bh->b_data + offset, data, tocopy);
2366 flush_dcache_page(bh->b_page);
2367 set_buffer_uptodate(bh);
2368 unlock_buffer(bh);
Jan Kara361d94a2012-11-13 18:25:38 +01002369 reiserfs_write_lock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002370 reiserfs_prepare_for_journal(sb, bh, 1);
2371 journal_mark_dirty(current->journal_info, sb, bh);
2372 if (!journal_quota)
2373 reiserfs_add_ordered_list(inode, bh);
Jan Kara361d94a2012-11-13 18:25:38 +01002374 reiserfs_write_unlock(sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002375 brelse(bh);
2376 offset = 0;
2377 towrite -= tocopy;
2378 data += tocopy;
2379 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002380 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002381out:
Jan Kara67f16482012-04-25 21:28:12 +02002382 if (len == towrite)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002383 return err;
2384 if (inode->i_size < off + len - towrite)
2385 i_size_write(inode, off + len - towrite);
2386 inode->i_version++;
2387 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2388 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002389 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390}
2391
2392#endif
2393
Al Viro152a0832010-07-25 00:46:55 +04002394static struct dentry *get_super_block(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -07002395 int flags, const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04002396 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397{
Al Viro152a0832010-07-25 00:46:55 +04002398 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002399}
2400
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002401static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402{
2403 int ret;
2404
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002405 if ((ret = init_inodecache())) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 return ret;
2407 }
2408
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002409 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002411 ret = register_filesystem(&reiserfs_fs_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412
2413 if (ret == 0) {
2414 return 0;
2415 }
2416
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002417 reiserfs_proc_info_global_done();
2418 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419
2420 return ret;
2421}
2422
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002423static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002424{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002425 reiserfs_proc_info_global_done();
2426 unregister_filesystem(&reiserfs_fs_type);
2427 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428}
2429
2430struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002431 .owner = THIS_MODULE,
2432 .name = "reiserfs",
Al Viro152a0832010-07-25 00:46:55 +04002433 .mount = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002434 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002435 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08002437MODULE_ALIAS_FS("reiserfs");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002439MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2440MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2441MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002443module_init(init_reiserfs_fs);
2444module_exit(exit_reiserfs_fs);