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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
10 *
11 * NO WARRANTY
12 */
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/vmalloc.h>
17#include <linux/time.h>
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) {
246 retval = search_item(s, &max_cpu_key, &path);
247 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400248 reiserfs_error(s, "vs-2140",
249 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700250 break;
251 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700253 bh = get_last_bh(&path);
254 item_pos = get_item_pos(&path);
255 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400256 reiserfs_warning(s, "vs-2060",
257 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700258 break;
259 }
260 item_pos--;
261 ih = B_N_PITEM_HEAD(bh, item_pos);
262
263 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
264 /* there are no "save" links anymore */
265 break;
266
267 save_link_key = ih->ih_key;
268 if (is_indirect_le_ih(ih))
269 truncate = 1;
270 else
271 truncate = 0;
272
273 /* reiserfs_iget needs k_dirid and k_objectid only */
274 item = B_I_PITEM(bh, ih);
275 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
276 obj_key.on_disk_key.k_objectid =
277 le32_to_cpu(ih->ih_key.k_objectid);
278 obj_key.on_disk_key.k_offset = 0;
279 obj_key.on_disk_key.k_type = 0;
280
281 pathrelse(&path);
282
283 inode = reiserfs_iget(s, &obj_key);
284 if (!inode) {
285 /* the unlink almost completed, it just did not manage to remove
286 "save" link and release objectid */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400287 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700288 &obj_key);
289 retval = remove_save_link_only(s, &save_link_key, 1);
290 continue;
291 }
292
293 if (!truncate && inode->i_nlink) {
294 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400295 reiserfs_warning(s, "vs-2185",
296 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700297 &obj_key);
298 retval = remove_save_link_only(s, &save_link_key, 0);
299 continue;
300 }
Christoph Hellwig871a2932010-03-03 09:05:07 -0500301 dquot_initialize(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700302
303 if (truncate && S_ISDIR(inode->i_mode)) {
304 /* We got a truncate request for a dir which is impossible.
305 The only imaginable way is to execute unfinished truncate request
306 then boot into old kernel, remove the file and create dir with
307 the same key. */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400308 reiserfs_warning(s, "green-2101",
309 "impossible truncate on a "
310 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700311 INODE_PKEY(inode));
312 retval = remove_save_link_only(s, &save_link_key, 0);
313 truncate = 0;
314 iput(inode);
315 continue;
316 }
317
318 if (truncate) {
319 REISERFS_I(inode)->i_flags |=
320 i_link_saved_truncate_mask;
321 /* not completed truncate found. New size was committed together
322 with "save" link */
323 reiserfs_info(s, "Truncating %k to %Ld ..",
324 INODE_PKEY(inode), inode->i_size);
325 reiserfs_truncate_file(inode,
326 0
327 /*don't update modification time */
328 );
329 retval = remove_save_link(inode, truncate);
330 } else {
331 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
332 /* not completed unlink (rmdir) found */
333 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700334 if (memcmp(&last_inode_key, INODE_PKEY(inode),
335 sizeof(last_inode_key))){
336 last_inode_key = *INODE_PKEY(inode);
337 /* removal gets completed in iput */
338 retval = 0;
339 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400340 reiserfs_warning(s, "super-2189", "Dead loop "
341 "in finish_unfinished "
342 "detected, just remove "
343 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700344 retval = remove_save_link_only(s,
345 &save_link_key, 0);
346 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700347 }
348
349 iput(inode);
350 printk("done\n");
351 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700353 REISERFS_SB(s)->s_is_unlinked_ok = 0;
354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700356 /* Turn quotas off */
357 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200358 if (sb_dqopt(s)->files[i] && quota_enabled[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400359 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700360 }
361 if (ms_active_set)
362 /* Restore the flag back */
363 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700365 pathrelse(&path);
366 if (done)
367 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
368 "Completed\n", done);
369 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372/* to protect file being unlinked from getting lost we "safe" link files
373 being unlinked. This link will be deleted in the same transaction with last
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200374 item of file. mounting the filesystem we scan all these links and remove
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 files which almost got lost */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700376void add_save_link(struct reiserfs_transaction_handle *th,
377 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700379 INITIALIZE_PATH(path);
380 int retval;
381 struct cpu_key key;
382 struct item_head ih;
383 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700385 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700387 /* file can only get one "save link" of each kind */
388 RFALSE(truncate &&
389 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
390 "saved link already exists for truncated inode %lx",
391 (long)inode->i_ino);
392 RFALSE(!truncate &&
393 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
394 "saved link already exists for unlinked inode %lx",
395 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700397 /* setup key of "save" link */
398 key.version = KEY_FORMAT_3_5;
399 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
400 key.on_disk_key.k_objectid = inode->i_ino;
401 if (!truncate) {
402 /* unlink, rmdir, rename */
403 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
404 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700406 /* item head of "safe" link */
407 make_le_item_head(&ih, &key, key.version,
408 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
409 4 /*length */ , 0xffff /*free space */ );
410 } else {
411 /* truncate */
412 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400413 reiserfs_warning(inode->i_sb, "green-2102",
414 "Adding a truncate savelink for "
415 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700416 INODE_PKEY(inode));
417 set_cpu_key_k_offset(&key, 1);
418 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700420 /* item head of "safe" link */
421 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
422 4 /*length */ , 0 /*free space */ );
423 }
424 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700426 /* look for its place in the tree */
427 retval = search_item(inode->i_sb, &key, &path);
428 if (retval != ITEM_NOT_FOUND) {
429 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400430 reiserfs_error(inode->i_sb, "vs-2100",
431 "search_by_key (%K) returned %d", &key,
432 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700433 pathrelse(&path);
434 return;
435 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700437 /* body of "save" link */
438 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300440 /* put "save" link into tree, don't charge quota to anyone */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700441 retval =
442 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
443 if (retval) {
444 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400445 reiserfs_error(inode->i_sb, "vs-2120",
446 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700447 } else {
448 if (truncate)
449 REISERFS_I(inode)->i_flags |=
450 i_link_saved_truncate_mask;
451 else
452 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
453 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454}
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700457int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700459 struct reiserfs_transaction_handle th;
460 struct reiserfs_key key;
461 int err;
462
463 /* we are going to do one balancing only */
464 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
465 if (err)
466 return err;
467
468 /* setup key of "save" link */
469 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
470 key.k_objectid = INODE_PKEY(inode)->k_objectid;
471 if (!truncate) {
472 /* unlink, rmdir, rename */
473 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
474 1 + inode->i_sb->s_blocksize);
475 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
476 } else {
477 /* truncate */
478 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
479 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
480 }
481
482 if ((truncate &&
483 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
484 (!truncate &&
485 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
486 /* don't take quota bytes from anywhere */
487 reiserfs_delete_solid_item(&th, NULL, &key);
488 if (!truncate) {
489 reiserfs_release_objectid(&th, inode->i_ino);
490 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
491 } else
492 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
493
494 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495}
496
David Howellsedc666e2006-10-11 01:22:14 -0700497static void reiserfs_kill_sb(struct super_block *s)
498{
499 if (REISERFS_SB(s)) {
Jeff Mahoneya9e36da2011-12-21 21:18:43 +0100500 /*
501 * Force any pending inode evictions to occur now. Any
502 * inodes to be removed that have extended attributes
503 * associated with them need to clean them up before
504 * we can release the extended attribute root dentries.
505 * shrink_dcache_for_umount will BUG if we don't release
506 * those before it's called so ->put_super is too late.
507 */
508 shrink_dcache_sb(s);
509
510 dput(REISERFS_SB(s)->xattr_root);
511 REISERFS_SB(s)->xattr_root = NULL;
512 dput(REISERFS_SB(s)->priv_root);
513 REISERFS_SB(s)->priv_root = NULL;
David Howellsedc666e2006-10-11 01:22:14 -0700514 }
515
516 kill_block_super(s);
517}
518
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700519static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700521 struct reiserfs_transaction_handle th;
522 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400524 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
525
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200526 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200527
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700528 /* change file system state to current state if it was mounted with read-write permissions */
529 if (!(s->s_flags & MS_RDONLY)) {
530 if (!journal_begin(&th, s, 10)) {
531 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
532 1);
533 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
534 REISERFS_SB(s)->s_mount_state);
535 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
536 }
537 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700539 /* note, journal_release checks for readonly mount, and can decide not
540 ** to do a journal_end
541 */
542 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Jeff Mahoney50652272006-09-30 23:28:44 -0700544 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700546 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700548 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700550 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400551 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700552 REISERFS_SB(s)->reserved_blocks);
553 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700555 reiserfs_proc_info_done(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200557 reiserfs_write_unlock(s);
558 mutex_destroy(&REISERFS_SB(s)->lock);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700559 kfree(s->s_fs_info);
560 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561}
562
Christoph Lametere18b8902006-12-06 20:33:20 -0800563static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565static struct inode *reiserfs_alloc_inode(struct super_block *sb)
566{
567 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700568 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800569 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 if (!ei)
571 return NULL;
Al Viro0e4f6a72010-07-04 12:18:57 +0400572 atomic_set(&ei->openers, 0);
573 mutex_init(&ei->tailpack);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 return &ei->vfs_inode;
575}
576
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100577static void reiserfs_i_callback(struct rcu_head *head)
578{
579 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100580 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
581}
582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583static void reiserfs_destroy_inode(struct inode *inode)
584{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100585 call_rcu(&inode->i_rcu, reiserfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586}
587
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700588static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700590 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Christoph Lametera35afb82007-05-16 22:10:57 -0700592 INIT_LIST_HEAD(&ei->i_prealloc_list);
593 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596static int init_inodecache(void)
597{
598 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700599 sizeof(struct
600 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800601 0, (SLAB_RECLAIM_ACCOUNT|
602 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900603 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 if (reiserfs_inode_cachep == NULL)
605 return -ENOMEM;
606 return 0;
607}
608
609static void destroy_inodecache(void)
610{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000611 /*
612 * Make sure all delayed rcu free inodes are flushed before we
613 * destroy cache.
614 */
615 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700616 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617}
618
619/* we don't mark inodes dirty, we just log them */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400620static void reiserfs_dirty_inode(struct inode *inode, int flags)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700621{
622 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700624 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200625 int lock_depth;
626
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700627 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400628 reiserfs_warning(inode->i_sb, "clm-6006",
629 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700630 inode->i_ino);
631 return;
632 }
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200633 lock_depth = reiserfs_write_lock_once(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700635 /* this is really only used for atime updates, so they don't have
636 ** to be included in O_SYNC or fsync
637 */
638 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200639 if (err)
640 goto out;
641
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700642 reiserfs_update_sd(&th, inode);
643 journal_end(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200644
645out:
646 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647}
648
Jan Karac3aa0772011-12-21 20:17:10 +0100649static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
650{
651 struct super_block *s = root->d_sb;
652 struct reiserfs_journal *journal = SB_JOURNAL(s);
653 long opts = REISERFS_SB(s)->s_mount_opt;
654
655 if (opts & (1 << REISERFS_LARGETAIL))
656 seq_puts(seq, ",tails=on");
657 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
658 seq_puts(seq, ",notail");
659 /* tails=small is default so we don't show it */
660
661 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
662 seq_puts(seq, ",barrier=none");
663 /* barrier=flush is default so we don't show it */
664
665 if (opts & (1 << REISERFS_ERROR_CONTINUE))
666 seq_puts(seq, ",errors=continue");
667 else if (opts & (1 << REISERFS_ERROR_PANIC))
668 seq_puts(seq, ",errors=panic");
669 /* errors=ro is default so we don't show it */
670
671 if (opts & (1 << REISERFS_DATA_LOG))
672 seq_puts(seq, ",data=journal");
673 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
674 seq_puts(seq, ",data=writeback");
675 /* data=ordered is default so we don't show it */
676
677 if (opts & (1 << REISERFS_ATTRS))
678 seq_puts(seq, ",attrs");
679
680 if (opts & (1 << REISERFS_XATTRS_USER))
681 seq_puts(seq, ",user_xattr");
682
683 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
684 seq_puts(seq, ",expose_privroot");
685
686 if (opts & (1 << REISERFS_POSIXACL))
687 seq_puts(seq, ",acl");
688
689 if (REISERFS_SB(s)->s_jdev)
690 seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
691
692 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
693 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
694
695#ifdef CONFIG_QUOTA
696 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
697 seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
698 else if (opts & (1 << REISERFS_USRQUOTA))
699 seq_puts(seq, ",usrquota");
700 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
701 seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
702 else if (opts & (1 << REISERFS_GRPQUOTA))
703 seq_puts(seq, ",grpquota");
704 if (REISERFS_SB(s)->s_jquota_fmt) {
705 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
706 seq_puts(seq, ",jqfmt=vfsold");
707 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
708 seq_puts(seq, ",jqfmt=vfsv0");
709 }
710#endif
711
712 /* Block allocator options */
713 if (opts & (1 << REISERFS_NO_BORDER))
714 seq_puts(seq, ",block-allocator=noborder");
715 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
716 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
717 if (opts & (1 << REISERFS_HASHED_RELOCATION))
718 seq_puts(seq, ",block-allocator=hashed_relocation");
719 if (opts & (1 << REISERFS_TEST4))
720 seq_puts(seq, ",block-allocator=test4");
721 show_alloc_options(seq, s);
722 return 0;
723}
724
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700726static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
727 size_t, loff_t);
728static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
729 loff_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730#endif
731
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800732static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700733 .alloc_inode = reiserfs_alloc_inode,
734 .destroy_inode = reiserfs_destroy_inode,
735 .write_inode = reiserfs_write_inode,
736 .dirty_inode = reiserfs_dirty_inode,
Al Viro845a2cc2010-06-07 11:37:37 -0400737 .evict_inode = reiserfs_evict_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700738 .put_super = reiserfs_put_super,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700739 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800740 .freeze_fs = reiserfs_freeze,
741 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700742 .statfs = reiserfs_statfs,
743 .remount_fs = reiserfs_remount,
Jan Karac3aa0772011-12-21 20:17:10 +0100744 .show_options = reiserfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700746 .quota_read = reiserfs_quota_read,
747 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748#endif
749};
750
751#ifdef CONFIG_QUOTA
752#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754static int reiserfs_write_dquot(struct dquot *);
755static int reiserfs_acquire_dquot(struct dquot *);
756static int reiserfs_release_dquot(struct dquot *);
757static int reiserfs_mark_dquot_dirty(struct dquot *);
758static int reiserfs_write_info(struct super_block *, int);
Jan Karaf00c9e42010-09-15 17:38:58 +0200759static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700761static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700762 .write_dquot = reiserfs_write_dquot,
763 .acquire_dquot = reiserfs_acquire_dquot,
764 .release_dquot = reiserfs_release_dquot,
765 .mark_dirty = reiserfs_mark_dquot_dirty,
766 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100767 .alloc_dquot = dquot_alloc,
768 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769};
770
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700771static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700772 .quota_on = reiserfs_quota_on,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400773 .quota_off = dquot_quota_off,
774 .quota_sync = dquot_quota_sync,
775 .get_info = dquot_get_dqinfo,
776 .set_info = dquot_set_dqinfo,
777 .get_dqblk = dquot_get_dqblk,
778 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779};
780#endif
781
Christoph Hellwig39655162007-10-21 16:42:17 -0700782static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700783 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700784 .fh_to_dentry = reiserfs_fh_to_dentry,
785 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700786 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700787};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
789/* this struct is used in reiserfs_getopt () for containing the value for those
790 mount options that have values rather than being toggles. */
791typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700792 char *value;
793 int setmask; /* bitmask which is to set on mount_options bitmask when this
794 value is found, 0 is no bits are to be changed. */
795 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
796 value is found, 0 is no bits are to be changed. This is
797 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798} arg_desc_t;
799
800/* Set this bit in arg_required to allow empty arguments */
801#define REISERFS_OPT_ALLOWEMPTY 31
802
803/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
804 mount options */
805typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700806 char *option_name;
807 int arg_required; /* 0 if argument is not required, not 0 otherwise */
808 const arg_desc_t *values; /* list of values accepted by an option */
809 int setmask; /* bitmask which is to set on mount_options bitmask when this
810 value is found, 0 is no bits are to be changed. */
811 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
812 value is found, 0 is no bits are to be changed. This is
813 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814} opt_desc_t;
815
816/* possible values for -o data= */
817static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700818 {"ordered", 1 << REISERFS_DATA_ORDERED,
819 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
820 {"journal", 1 << REISERFS_DATA_LOG,
821 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
822 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
823 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800824 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825};
826
827/* possible values for -o barrier= */
828static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700829 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
830 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800831 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832};
833
834/* possible values for "-o block-allocator=" and bits which are to be set in
835 s_mount_opt of reiserfs specific part of in-core super block */
836static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700837 {"noborder", 1 << REISERFS_NO_BORDER, 0},
838 {"border", 0, 1 << REISERFS_NO_BORDER},
839 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
840 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
841 {"test4", 1 << REISERFS_TEST4, 0},
842 {"notest4", 0, 1 << REISERFS_TEST4},
843 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844};
845
846static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700847 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
848 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
849 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
850 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851};
852
853static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700854 {"panic", 1 << REISERFS_ERROR_PANIC,
855 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
856 {"ro-remount", 1 << REISERFS_ERROR_RO,
857 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700859 {"continue", 1 << REISERFS_ERROR_CONTINUE,
860 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700862 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863};
864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865/* proceed only one option from a list *cur - string containing of mount options
866 opts - array of options which are accepted
867 opt_arg - if option is found and requires an argument and if it is specifed
868 in the input - pointer to the argument is stored here
869 bit_flags - if option requires to set a certain bit - it is set here
870 return -1 if unknown option is found, opt->arg_required otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700871static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
872 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700874 char *p;
Jeff Mahoney0222e652009-03-30 14:02:44 -0400875 /* foo=bar,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700876 ^ ^ ^
877 | | +-- option_end
878 | +-- arg_start
879 +-- option_start
880 */
881 const opt_desc_t *opt;
882 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700884 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700886 /* assume argument cannot contain commas */
887 *cur = strchr(p, ',');
888 if (*cur) {
889 *(*cur) = '\0';
890 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700893 if (!strncmp(p, "alloc=", 6)) {
894 /* Ugly special case, probably we should redo options parser so that
895 it can understand several arguments for some options, also so that
896 it can fill several bitfields with option values. */
897 if (reiserfs_parse_alloc_options(s, p + 6)) {
898 return -1;
899 } else {
900 return 0;
901 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700903
904 /* for every option in the list */
905 for (opt = opts; opt->option_name; opt++) {
906 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
907 if (bit_flags) {
908 if (opt->clrmask ==
909 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400910 reiserfs_warning(s, "super-6500",
911 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700912 p);
913 else
914 *bit_flags &= ~opt->clrmask;
915 if (opt->setmask ==
916 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400917 reiserfs_warning(s, "super-6501",
918 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700919 p);
920 else
921 *bit_flags |= opt->setmask;
922 }
923 break;
924 }
925 }
926 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400927 reiserfs_warning(s, "super-6502",
928 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700929 return -1;
930 }
931
932 p += strlen(opt->option_name);
933 switch (*p) {
934 case '=':
935 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400936 reiserfs_warning(s, "super-6503",
937 "the option \"%s\" does not "
938 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700939 opt->option_name);
940 return -1;
941 }
942 break;
943
944 case 0:
945 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400946 reiserfs_warning(s, "super-6504",
947 "the option \"%s\" requires an "
948 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700949 return -1;
950 }
951 break;
952 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400953 reiserfs_warning(s, "super-6505",
954 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700955 opt->option_name);
956 return -1;
957 }
958
959 /* move to the argument, or to next option if argument is not required */
960 p++;
961
962 if (opt->arg_required
963 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
964 && !strlen(p)) {
965 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400966 reiserfs_warning(s, "super-6506",
967 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700968 opt->option_name);
969 return -1;
970 }
971
972 if (!opt->values) {
973 /* *=NULLopt_arg contains pointer to argument */
974 *opt_arg = p;
975 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
976 }
977
978 /* values possible for this option are listed in opt->values */
979 for (arg = opt->values; arg->value; arg++) {
980 if (!strcmp(p, arg->value)) {
981 if (bit_flags) {
982 *bit_flags &= ~arg->clrmask;
983 *bit_flags |= arg->setmask;
984 }
985 return opt->arg_required;
986 }
987 }
988
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400989 reiserfs_warning(s, "super-6506",
990 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700991 opt->option_name);
992 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993}
994
995/* returns 0 if something is wrong in option string, 1 - otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700996static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
997 unsigned long *mount_options,
998 /* after the parsing phase, contains the
999 collection of bitflags defining what
1000 mount options were selected. */
1001 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
1002 char **jdev_name,
Jan Kara00b441972008-07-25 01:46:38 -07001003 unsigned int *commit_max_age,
1004 char **qf_names,
1005 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001007 int c;
1008 char *arg = NULL;
1009 char *pos;
1010 opt_desc_t opts[] = {
1011 /* Compatibility stuff, so that -o notail for old setups still work */
1012 {"tails",.arg_required = 't',.values = tails},
1013 {"notail",.clrmask =
1014 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1015 {"conv",.setmask = 1 << REISERFS_CONVERT},
1016 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1017 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -04001018 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001020 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1021 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001023 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1024 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025#endif
1026#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001027 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1028 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001030 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1031 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001033 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001034 {"replayonly",.setmask = 1 << REPLAYONLY},
1035 {"block-allocator",.arg_required = 'a',.values = balloc},
1036 {"data",.arg_required = 'd',.values = logging_mode},
1037 {"barrier",.arg_required = 'b',.values = barrier_mode},
1038 {"resize",.arg_required = 'r',.values = NULL},
1039 {"jdev",.arg_required = 'j',.values = NULL},
1040 {"nolargeio",.arg_required = 'w',.values = NULL},
1041 {"commit",.arg_required = 'c',.values = NULL},
Jan Karac3aa0772011-12-21 20:17:10 +01001042 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1043 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1044 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001045 {"errors",.arg_required = 'e',.values = error_actions},
1046 {"usrjquota",.arg_required =
1047 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1048 {"grpjquota",.arg_required =
1049 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1050 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001051 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001052 };
1053
1054 *blocks = 0;
1055 if (!options || !*options)
1056 /* use default configuration: create tails, journaling on, no
1057 conversion to newest format */
1058 return 1;
1059
1060 for (pos = options; pos;) {
1061 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1062 if (c == -1)
1063 /* wrong option is given */
1064 return 0;
1065
1066 if (c == 'r') {
1067 char *p;
1068
1069 p = NULL;
1070 /* "resize=NNN" or "resize=auto" */
1071
1072 if (!strcmp(arg, "auto")) {
1073 /* From JFS code, to auto-get the size. */
1074 *blocks =
1075 s->s_bdev->bd_inode->i_size >> s->
1076 s_blocksize_bits;
1077 } else {
1078 *blocks = simple_strtoul(arg, &p, 0);
1079 if (*p != '\0') {
1080 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001081 reiserfs_warning(s, "super-6507",
1082 "bad value %s for "
1083 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001084 return 0;
1085 }
1086 }
1087 }
1088
1089 if (c == 'c') {
1090 char *p = NULL;
1091 unsigned long val = simple_strtoul(arg, &p, 0);
1092 /* commit=NNN (time in seconds) */
1093 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001094 reiserfs_warning(s, "super-6508",
1095 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001096 arg);
1097 return 0;
1098 }
1099 *commit_max_age = (unsigned int)val;
1100 }
1101
1102 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001103 reiserfs_warning(s, "super-6509", "nolargeio option "
1104 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -07001105 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001106 }
1107
1108 if (c == 'j') {
1109 if (arg && *arg && jdev_name) {
1110 if (*jdev_name) { //Hm, already assigned?
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001111 reiserfs_warning(s, "super-6510",
1112 "journal device was "
1113 "already specified to "
1114 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001115 return 0;
1116 }
1117 *jdev_name = arg;
1118 }
1119 }
1120#ifdef CONFIG_QUOTA
1121 if (c == 'u' || c == 'g') {
1122 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1123
Jan Kara6929f892008-08-20 18:16:36 +02001124 if (sb_any_quota_loaded(s) &&
Jan Kara00b441972008-07-25 01:46:38 -07001125 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001126 reiserfs_warning(s, "super-6511",
1127 "cannot change journaled "
1128 "quota options when quota "
1129 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001130 return 0;
1131 }
1132 if (*arg) { /* Some filename specified? */
1133 if (REISERFS_SB(s)->s_qf_names[qtype]
1134 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1135 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001136 reiserfs_warning(s, "super-6512",
1137 "%s quota file "
1138 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001139 QTYPE2NAME(qtype));
1140 return 0;
1141 }
1142 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001143 reiserfs_warning(s, "super-6513",
1144 "quotafile must be "
1145 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001146 return 0;
1147 }
Jan Kara00b441972008-07-25 01:46:38 -07001148 qf_names[qtype] =
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001149 kmalloc(strlen(arg) + 1, GFP_KERNEL);
Jan Kara00b441972008-07-25 01:46:38 -07001150 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001151 reiserfs_warning(s, "reiserfs-2502",
1152 "not enough memory "
1153 "for storing "
1154 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001155 return 0;
1156 }
Jan Kara00b441972008-07-25 01:46:38 -07001157 strcpy(qf_names[qtype], arg);
Jan Karac3aa0772011-12-21 20:17:10 +01001158 if (qtype == USRQUOTA)
1159 *mount_options |= 1 << REISERFS_USRQUOTA;
1160 else
1161 *mount_options |= 1 << REISERFS_GRPQUOTA;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001162 } else {
Jan Kara00b441972008-07-25 01:46:38 -07001163 if (qf_names[qtype] !=
1164 REISERFS_SB(s)->s_qf_names[qtype])
1165 kfree(qf_names[qtype]);
1166 qf_names[qtype] = NULL;
Jan Karac3aa0772011-12-21 20:17:10 +01001167 if (qtype == USRQUOTA)
1168 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1169 else
1170 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001171 }
1172 }
1173 if (c == 'f') {
1174 if (!strcmp(arg, "vfsold"))
Jan Kara00b441972008-07-25 01:46:38 -07001175 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001176 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b441972008-07-25 01:46:38 -07001177 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001178 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001179 reiserfs_warning(s, "super-6514",
1180 "unknown quota format "
1181 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001182 return 0;
1183 }
Jan Kara6929f892008-08-20 18:16:36 +02001184 if (sb_any_quota_loaded(s) &&
Jan Kara00b441972008-07-25 01:46:38 -07001185 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001186 reiserfs_warning(s, "super-6515",
1187 "cannot change journaled "
1188 "quota options when quota "
1189 "turned on.");
Jan Kara00b441972008-07-25 01:46:38 -07001190 return 0;
1191 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001192 }
1193#else
1194 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001195 reiserfs_warning(s, "reiserfs-2503", "journaled "
1196 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001197 return 0;
1198 }
1199#endif
1200 }
1201
1202#ifdef CONFIG_QUOTA
Jan Kara00b441972008-07-25 01:46:38 -07001203 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1204 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001205 reiserfs_warning(s, "super-6515",
1206 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001207 return 0;
1208 }
Jan Karac3aa0772011-12-21 20:17:10 +01001209 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1210 sb_has_quota_loaded(s, USRQUOTA)) ||
1211 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1212 sb_has_quota_loaded(s, GRPQUOTA))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001213 reiserfs_warning(s, "super-6516", "quota options must "
1214 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001215 return 0;
1216 }
1217#endif
1218
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220}
1221
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001222static void switch_data_mode(struct super_block *s, unsigned long mode)
1223{
1224 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1225 (1 << REISERFS_DATA_ORDERED) |
1226 (1 << REISERFS_DATA_WRITEBACK));
1227 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228}
1229
1230static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1231{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001232 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1233 if (!reiserfs_data_log(s)) {
1234 switch_data_mode(s, REISERFS_DATA_LOG);
1235 reiserfs_info(s, "switching to journaled data mode\n");
1236 }
1237 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1238 if (!reiserfs_data_ordered(s)) {
1239 switch_data_mode(s, REISERFS_DATA_ORDERED);
1240 reiserfs_info(s, "switching to ordered data mode\n");
1241 }
1242 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1243 if (!reiserfs_data_writeback(s)) {
1244 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1245 reiserfs_info(s, "switching to writeback data mode\n");
1246 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248}
1249
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001250static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001252 int flush = (1 << REISERFS_BARRIER_FLUSH);
1253 int none = (1 << REISERFS_BARRIER_NONE);
1254 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001256 if (bits & all_barrier) {
1257 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1258 if (bits & flush) {
1259 REISERFS_SB(s)->s_mount_opt |= flush;
1260 printk("reiserfs: enabling write barrier flush mode\n");
1261 } else if (bits & none) {
1262 REISERFS_SB(s)->s_mount_opt |= none;
1263 printk("reiserfs: write barriers turned off\n");
1264 }
1265 }
1266}
1267
1268static void handle_attrs(struct super_block *s)
1269{
1270 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1271
1272 if (reiserfs_attrs(s)) {
1273 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001274 reiserfs_warning(s, "super-6517", "cannot support "
1275 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001276 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 return;
1278 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001279 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001280 reiserfs_warning(s, "super-6518", "cannot support "
1281 "attributes until flag is set in "
1282 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001283 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 }
1285 }
1286}
1287
Jan Kara00b441972008-07-25 01:46:38 -07001288#ifdef CONFIG_QUOTA
1289static void handle_quota_files(struct super_block *s, char **qf_names,
1290 unsigned int *qfmt)
1291{
1292 int i;
1293
1294 for (i = 0; i < MAXQUOTAS; i++) {
1295 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1296 kfree(REISERFS_SB(s)->s_qf_names[i]);
1297 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1298 }
Jan Karaa06d7892011-12-21 17:35:34 +01001299 if (*qfmt)
1300 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
Jan Kara00b441972008-07-25 01:46:38 -07001301}
1302#endif
1303
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001304static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001306 struct reiserfs_super_block *rs;
1307 struct reiserfs_transaction_handle th;
1308 unsigned long blocks;
1309 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1310 unsigned long safe_mask = 0;
1311 unsigned int commit_max_age = (unsigned int)-1;
1312 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001313 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001314 int err;
Jan Kara00b441972008-07-25 01:46:38 -07001315 char *qf_names[MAXQUOTAS];
1316 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001318 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001319#endif
Jan Kara00b441972008-07-25 01:46:38 -07001320
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001321 reiserfs_write_lock(s);
1322
1323#ifdef CONFIG_QUOTA
Jan Kara00b441972008-07-25 01:46:38 -07001324 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325#endif
1326
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001327 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001329 if (!reiserfs_parse_options
Jan Kara00b441972008-07-25 01:46:38 -07001330 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1331 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332#ifdef CONFIG_QUOTA
Jan Kara00b441972008-07-25 01:46:38 -07001333 for (i = 0; i < MAXQUOTAS; i++)
1334 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1335 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001336#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001337 err = -EINVAL;
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001338 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 }
Jan Kara00b441972008-07-25 01:46:38 -07001340#ifdef CONFIG_QUOTA
1341 handle_quota_files(s, qf_names, &qfmt);
1342#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001344 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001346 /* Add options that are safe here */
1347 safe_mask |= 1 << REISERFS_SMALLTAIL;
1348 safe_mask |= 1 << REISERFS_LARGETAIL;
1349 safe_mask |= 1 << REISERFS_NO_BORDER;
1350 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1351 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1352 safe_mask |= 1 << REISERFS_TEST4;
1353 safe_mask |= 1 << REISERFS_ATTRS;
1354 safe_mask |= 1 << REISERFS_XATTRS_USER;
1355 safe_mask |= 1 << REISERFS_POSIXACL;
1356 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1357 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1358 safe_mask |= 1 << REISERFS_ERROR_RO;
1359 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1360 safe_mask |= 1 << REISERFS_ERROR_PANIC;
Jan Karac3aa0772011-12-21 20:17:10 +01001361 safe_mask |= 1 << REISERFS_USRQUOTA;
1362 safe_mask |= 1 << REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001364 /* Update the bitmask, taking care to keep
1365 * the bits we're not allowed to change here */
1366 REISERFS_SB(s)->s_mount_opt =
1367 (REISERFS_SB(s)->
1368 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001370 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1371 journal->j_max_commit_age = commit_max_age;
1372 journal->j_max_trans_age = commit_max_age;
1373 } else if (commit_max_age == 0) {
1374 /* 0 means restore defaults. */
1375 journal->j_max_commit_age = journal->j_default_max_commit_age;
1376 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1377 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001379 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001380 err = reiserfs_resize(s, blocks);
1381 if (err != 0)
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001382 goto out_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001383 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001385 if (*mount_flags & MS_RDONLY) {
1386 reiserfs_xattr_init(s, *mount_flags);
1387 /* remount read-only */
1388 if (s->s_flags & MS_RDONLY)
1389 /* it is read-only already */
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001390 goto out_ok;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001391
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001392 /*
1393 * Drop write lock. Quota will retake it when needed and lock
1394 * ordering requires calling dquot_suspend() without it.
1395 */
1396 reiserfs_write_unlock(s);
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001397 err = dquot_suspend(s, -1);
1398 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001399 goto out_err;
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001400 reiserfs_write_lock(s);
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001401
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001402 /* try to remount file system with read-only permissions */
1403 if (sb_umount_state(rs) == REISERFS_VALID_FS
1404 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001405 goto out_ok;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001406 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001408 err = journal_begin(&th, s, 10);
1409 if (err)
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001410 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001412 /* Mounting a rw partition read-only. */
1413 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1414 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1415 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1416 } else {
1417 /* remount read-write */
1418 if (!(s->s_flags & MS_RDONLY)) {
1419 reiserfs_xattr_init(s, *mount_flags);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001420 goto out_ok; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001421 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001423 if (reiserfs_is_journal_aborted(journal)) {
1424 err = journal->j_errno;
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001425 goto out_unlock;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001426 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001428 handle_data_mode(s, mount_options);
1429 handle_barrier_mode(s, mount_options);
1430 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1431 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1432 err = journal_begin(&th, s, 10);
1433 if (err)
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001434 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001436 /* Mount a partition which is read-only, read-write */
1437 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1438 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1439 s->s_flags &= ~MS_RDONLY;
1440 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001441 if (!old_format_only(s))
1442 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001443 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1444 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1445 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1446 }
1447 /* this will force a full flush of all journal lists */
1448 SB_JOURNAL(s)->j_must_wait = 1;
1449 err = journal_end(&th, s, 10);
1450 if (err)
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001451 goto out_unlock;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001452
1453 if (!(*mount_flags & MS_RDONLY)) {
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001454 /*
1455 * Drop write lock. Quota will retake it when needed and lock
1456 * ordering requires calling dquot_resume() without it.
1457 */
1458 reiserfs_write_unlock(s);
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001459 dquot_resume(s, -1);
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001460 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001461 finish_unfinished(s);
1462 reiserfs_xattr_init(s, *mount_flags);
1463 }
1464
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001465out_ok:
Al Viro2a32ceb2009-05-08 16:05:57 -04001466 replace_mount_options(s, new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001467 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001468 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001469
Jan Kara3bb3e1f2012-11-13 14:55:52 +01001470out_unlock:
1471 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001472out_err:
1473 kfree(new_opts);
1474 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475}
1476
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001477static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001479 struct buffer_head *bh;
1480 struct reiserfs_super_block *rs;
1481 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001483 bh = sb_bread(s, offset / s->s_blocksize);
1484 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001485 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001486 "bread failed (dev %s, block %lu, size %lu)",
1487 reiserfs_bdevname(s), offset / s->s_blocksize,
1488 s->s_blocksize);
1489 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001492 rs = (struct reiserfs_super_block *)bh->b_data;
1493 if (!is_any_reiserfs_magic_string(rs)) {
1494 brelse(bh);
1495 return 1;
1496 }
1497 //
1498 // ok, reiserfs signature (old or new) found in at the given offset
Jeff Mahoney0222e652009-03-30 14:02:44 -04001499 //
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001500 fs_blocksize = sb_blocksize(rs);
1501 brelse(bh);
1502 sb_set_blocksize(s, fs_blocksize);
1503
1504 bh = sb_bread(s, offset / s->s_blocksize);
1505 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001506 reiserfs_warning(s, "sh-2007",
1507 "bread failed (dev %s, block %lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001508 reiserfs_bdevname(s), offset / s->s_blocksize,
1509 s->s_blocksize);
1510 return 1;
1511 }
1512
1513 rs = (struct reiserfs_super_block *)bh->b_data;
1514 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001515 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1516 "filesystem on (dev %s, block %Lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001517 reiserfs_bdevname(s),
1518 (unsigned long long)bh->b_blocknr,
1519 s->s_blocksize);
1520 brelse(bh);
1521 return 1;
1522 }
1523
1524 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1525 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001526 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1527 "--rebuild-tree run detected. Please run\n"
1528 "reiserfsck --rebuild-tree and wait for a "
1529 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001530 "get newer reiserfsprogs package");
1531 return 1;
1532 }
1533
1534 SB_BUFFER_WITH_SB(s) = bh;
1535 SB_DISK_SUPER_BLOCK(s) = rs;
1536
1537 if (is_reiserfs_jr(rs)) {
1538 /* magic is of non-standard journal filesystem, look at s_version to
1539 find which format is in use */
1540 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001541 reiserfs_info(s, "found reiserfs format \"3.6\""
1542 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001543 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001544 reiserfs_info(s, "found reiserfs format \"3.5\""
1545 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001546 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001547 reiserfs_warning(s, "sh-2012", "found unknown "
1548 "format \"%u\" of reiserfs with "
1549 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001550 return 1;
1551 }
1552 } else
1553 /* s_version of standard format may contain incorrect information,
1554 so we just look at the magic string */
1555 reiserfs_info(s,
1556 "found reiserfs format \"%s\" with standard journal\n",
1557 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1558
1559 s->s_op = &reiserfs_sops;
1560 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001562 s->s_qcop = &reiserfs_qctl_operations;
1563 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564#endif
1565
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001566 /* new format is limited by the 32 bit wide i_blocks field, want to
1567 ** be one full block below that.
1568 */
1569 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1570 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571}
1572
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001574static int reread_meta_blocks(struct super_block *s)
1575{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001576 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1577 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1578 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001579 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001580 return 1;
1581 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001583 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584}
1585
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586/////////////////////////////////////////////////////
1587// hash detection stuff
1588
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589// if root directory is empty - we set default - Yura's - hash and
1590// warn about it
1591// FIXME: we look for only one name in a directory. If tea and yura
1592// bith have the same value - we ask user to send report to the
1593// mailing list
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001594static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001596 int retval;
1597 struct inode *inode;
1598 struct cpu_key key;
1599 INITIALIZE_PATH(path);
1600 struct reiserfs_dir_entry de;
1601 __u32 hash = DEFAULT_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001603 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001605 do { // Some serious "goto"-hater was there ;)
1606 u32 teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001608 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1609 retval = search_by_entry_key(s, &key, &path, &de);
1610 if (retval == IO_ERROR) {
1611 pathrelse(&path);
1612 return UNSET_HASH;
1613 }
1614 if (retval == NAME_NOT_FOUND)
1615 de.de_entry_num--;
1616 set_de_name_and_namelen(&de);
1617 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1618 /* allow override in this case */
1619 if (reiserfs_rupasov_hash(s)) {
1620 hash = YURA_HASH;
1621 }
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001622 reiserfs_info(s, "FS seems to be empty, autodetect "
1623 "is using the default hash\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001624 break;
1625 }
1626 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1627 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1628 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1629 if (((teahash == r5hash)
1630 &&
1631 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1632 == r5hash)) || ((teahash == yurahash)
1633 && (yurahash ==
1634 GET_HASH_VALUE(deh_offset
1635 (&
1636 (de.
1637 de_deh[de.
1638 de_entry_num])))))
1639 || ((r5hash == yurahash)
1640 && (yurahash ==
1641 GET_HASH_VALUE(deh_offset
1642 (&(de.de_deh[de.de_entry_num])))))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001643 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1644 "automatically detect hash function. "
1645 "Please mount with -o "
1646 "hash={tea,rupasov,r5}");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001647 hash = UNSET_HASH;
1648 break;
1649 }
1650 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1651 yurahash)
1652 hash = YURA_HASH;
1653 else if (GET_HASH_VALUE
1654 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1655 hash = TEA_HASH;
1656 else if (GET_HASH_VALUE
1657 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1658 hash = R5_HASH;
1659 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001660 reiserfs_warning(s, "reiserfs-2506",
1661 "Unrecognised hash function");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001662 hash = UNSET_HASH;
1663 }
1664 } while (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001666 pathrelse(&path);
1667 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668}
1669
1670// finds out which hash names are sorted with
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001671static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001673 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001675 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001677 /* reiserfs_hash_detect() == true if any of the hash mount options
1678 ** were used. We must check them to make sure the user isn't
1679 ** using a bad hash value
1680 */
1681 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1682 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001684 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney0222e652009-03-30 14:02:44 -04001685 /* detection has found the hash, and we must check against the
1686 ** mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001687 */
1688 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001689 reiserfs_warning(s, "reiserfs-2507",
1690 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001691 "unable to force rupasov hash",
1692 reiserfs_hashname(code));
1693 code = UNSET_HASH;
1694 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001695 reiserfs_warning(s, "reiserfs-2508",
1696 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001697 "unable to force tea hash",
1698 reiserfs_hashname(code));
1699 code = UNSET_HASH;
1700 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001701 reiserfs_warning(s, "reiserfs-2509",
1702 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001703 "unable to force r5 hash",
1704 reiserfs_hashname(code));
1705 code = UNSET_HASH;
1706 }
1707 } else {
1708 /* find_hash_out was not called or could not determine the hash */
1709 if (reiserfs_rupasov_hash(s)) {
1710 code = YURA_HASH;
1711 } else if (reiserfs_tea_hash(s)) {
1712 code = TEA_HASH;
1713 } else if (reiserfs_r5_hash(s)) {
1714 code = R5_HASH;
1715 }
1716 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717
Jeff Mahoney0222e652009-03-30 14:02:44 -04001718 /* if we are mounted RW, and we have a new valid hash code, update
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001719 ** the super
1720 */
1721 if (code != UNSET_HASH &&
1722 !(s->s_flags & MS_RDONLY) &&
1723 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1724 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1725 }
1726 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727}
1728
1729// return pointer to appropriate function
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001730static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001732 switch (what_hash(s)) {
1733 case TEA_HASH:
1734 reiserfs_info(s, "Using tea hash to sort names\n");
1735 return keyed_hash;
1736 case YURA_HASH:
1737 reiserfs_info(s, "Using rupasov hash to sort names\n");
1738 return yura_hash;
1739 case R5_HASH:
1740 reiserfs_info(s, "Using r5 hash to sort names\n");
1741 return r5_hash;
1742 }
1743 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744}
1745
1746// this is used to set up correct value for old partitions
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001747static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001749 if (func == keyed_hash)
1750 return TEA_HASH;
1751 if (func == yura_hash)
1752 return YURA_HASH;
1753 if (func == r5_hash)
1754 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001756 BUG(); // should never happen
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001758 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759}
1760
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001761#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001763 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001765static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001767 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001768 struct reiserfs_transaction_handle th;
1769 int old_format = 0;
1770 unsigned long blocks;
1771 unsigned int commit_max_age = 0;
1772 int jinit_done = 0;
1773 struct reiserfs_iget_args args;
1774 struct reiserfs_super_block *rs;
1775 char *jdev_name;
1776 struct reiserfs_sb_info *sbi;
1777 int errval = -EINVAL;
Jan Kara00b441972008-07-25 01:46:38 -07001778 char *qf_names[MAXQUOTAS] = {};
1779 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001781 save_mount_options(s, data);
1782
Yan Burman01afb212006-12-06 20:39:01 -08001783 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001784 if (!sbi)
1785 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001786 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001787 /* Set default values for options: non-aggressive tails, RO on errors */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001788 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1789 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1790 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001791 /* no preallocation minimum, be smart in
1792 reiserfs_file_write instead */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001793 sbi->s_alloc_options.preallocmin = 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001794 /* Preallocate by 16 blocks (17-1) at once */
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001795 sbi->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001796 /* setup default block allocator options */
1797 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798
Artem Bityutskiy033369d2012-06-01 17:18:08 +03001799 spin_lock_init(&sbi->old_work_lock);
1800 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001801 mutex_init(&sbi->lock);
1802 sbi->lock_depth = -1;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001803
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001804 jdev_name = NULL;
1805 if (reiserfs_parse_options
1806 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
Jan Kara00b441972008-07-25 01:46:38 -07001807 &commit_max_age, qf_names, &qfmt) == 0) {
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001808 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001809 }
Jan Karac3aa0772011-12-21 20:17:10 +01001810 if (jdev_name && jdev_name[0]) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001811 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1812 if (!sbi->s_jdev) {
Jan Karac3aa0772011-12-21 20:17:10 +01001813 SWARN(silent, s, "", "Cannot allocate memory for "
1814 "journal device name");
1815 goto error;
1816 }
1817 }
Jan Kara00b441972008-07-25 01:46:38 -07001818#ifdef CONFIG_QUOTA
1819 handle_quota_files(s, qf_names, &qfmt);
1820#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001822 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001823 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001824 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001825 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001827 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1828 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1829 old_format = 1;
1830 /* try new format (64-th 1k block), which can contain reiserfs super block */
1831 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001832 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001833 reiserfs_bdevname(s));
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001834 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001835 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001837 rs = SB_DISK_SUPER_BLOCK(s);
1838 /* Let's do basic sanity check to verify that underlying device is not
1839 smaller than the filesystem. If the check fails then abort and scream,
1840 because bad stuff will happen otherwise. */
1841 if (s->s_bdev && s->s_bdev->bd_inode
1842 && i_size_read(s->s_bdev->bd_inode) <
1843 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001844 SWARN(silent, s, "", "Filesystem cannot be "
1845 "mounted because it is bigger than the device");
1846 SWARN(silent, s, "", "You may need to run fsck "
1847 "or increase size of your LVM partition");
1848 SWARN(silent, s, "", "Or may be you forgot to "
1849 "reboot after fdisk when it told you to");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001850 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001851 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001853 sbi->s_mount_state = SB_REISERFS_STATE(s);
1854 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855
Jeff Mahoney6f010462006-09-30 23:28:43 -07001856 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001857 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001858 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001859 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001860
Jeff Mahoneyd2c89a422006-11-02 22:07:20 -08001861 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001863 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1864 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865#endif
1866
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001867 /* make data=ordered the default */
1868 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1869 !reiserfs_data_writeback(s)) {
Artem Bityutskiyefaa33e2012-06-01 17:18:04 +03001870 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001871 }
1872
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001873 if (reiserfs_data_log(s)) {
1874 reiserfs_info(s, "using journaled data mode\n");
1875 } else if (reiserfs_data_ordered(s)) {
1876 reiserfs_info(s, "using ordered data mode\n");
1877 } else {
1878 reiserfs_info(s, "using writeback data mode\n");
1879 }
1880 if (reiserfs_barrier_flush(s)) {
1881 printk("reiserfs: using flush barriers\n");
1882 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001883
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08001884 // set_device_ro(s->s_dev, 1) ;
1885 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1886 SWARN(silent, s, "sh-2022",
1887 "unable to initialize journal space");
1888 goto error_unlocked;
1889 } else {
1890 jinit_done = 1; /* once this is set, journal_release must be called
1891 ** if we error out of the mount
1892 */
1893 }
1894
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001895 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001896 SWARN(silent, s, "jmacd-9",
1897 "unable to reread meta blocks after journal init");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001898 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899 }
1900
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001901 if (replay_only(s))
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001902 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001903
1904 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001905 SWARN(silent, s, "clm-7000",
1906 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001907 s->s_flags |= MS_RDONLY;
1908 }
1909 args.objectid = REISERFS_ROOT_OBJECTID;
1910 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1911 root_inode =
1912 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1913 reiserfs_init_locked_inode, (void *)(&args));
1914 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001915 SWARN(silent, s, "jmacd-10", "get root inode failed");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001916 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 }
1918
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001919 /*
1920 * This path assumed to be called with the BKL in the old times.
1921 * Now we have inherited the big reiserfs lock from it and many
1922 * reiserfs helpers called in the mount path and elsewhere require
1923 * this lock to be held even if it's not always necessary. Let's be
1924 * conservative and hold it early. The window can be reduced after
1925 * careful review of the code.
1926 */
1927 reiserfs_write_lock(s);
1928
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001929 if (root_inode->i_state & I_NEW) {
1930 reiserfs_read_locked_inode(root_inode, &args);
1931 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 }
1933
Al Viro48fde702012-01-08 22:15:13 -05001934 s->s_root = d_make_root(root_inode);
1935 if (!s->s_root)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001936 goto error;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001937 // define and initialize hash function
1938 sbi->s_hash_function = hash_function(s);
1939 if (sbi->s_hash_function == NULL) {
1940 dput(s->s_root);
1941 s->s_root = NULL;
1942 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001944
1945 if (is_reiserfs_3_5(rs)
1946 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1947 set_bit(REISERFS_3_5, &(sbi->s_properties));
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07001948 else if (old_format)
1949 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001950 else
1951 set_bit(REISERFS_3_6, &(sbi->s_properties));
1952
1953 if (!(s->s_flags & MS_RDONLY)) {
1954
1955 errval = journal_begin(&th, s, 1);
1956 if (errval) {
1957 dput(s->s_root);
1958 s->s_root = NULL;
1959 goto error;
1960 }
1961 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1962
1963 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1964 set_sb_fs_state(rs, 0);
1965
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001966 /* Clear out s_bmap_nr if it would wrap. We can handle this
1967 * case, but older revisions can't. This will cause the
1968 * file system to fail mount on those older implementations,
1969 * avoiding corruption. -jeffm */
1970 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1971 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001972 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001973 "claims to use %u bitmap blocks in "
1974 "its super block, but requires %u. "
1975 "Clearing to zero.", sb_bmap_nr(rs),
1976 reiserfs_bmap_count(s));
1977
1978 set_sb_bmap_nr(rs, 0);
1979 }
1980
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001981 if (old_format_only(s)) {
1982 /* filesystem of format 3.5 either with standard or non-standard
1983 journal */
1984 if (convert_reiserfs(s)) {
1985 /* and -o conv is given */
1986 if (!silent)
1987 reiserfs_info(s,
1988 "converting 3.5 filesystem to the 3.6 format");
1989
1990 if (is_reiserfs_3_5(rs))
1991 /* put magic string of 3.6 format. 2.2 will not be able to
1992 mount this filesystem anymore */
1993 memcpy(rs->s_v1.s_magic,
1994 reiserfs_3_6_magic_string,
1995 sizeof
1996 (reiserfs_3_6_magic_string));
1997
1998 set_sb_version(rs, REISERFS_VERSION_2);
1999 reiserfs_convert_objectid_map_v1(s);
2000 set_bit(REISERFS_3_6, &(sbi->s_properties));
2001 clear_bit(REISERFS_3_5, &(sbi->s_properties));
2002 } else if (!silent) {
2003 reiserfs_info(s, "using 3.5.x disk format\n");
2004 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04002005 } else
2006 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2007
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002008
2009 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
2010 errval = journal_end(&th, s, 1);
2011 if (errval) {
2012 dput(s->s_root);
2013 s->s_root = NULL;
2014 goto error;
2015 }
2016
Al Viroedcc37a2009-05-03 06:00:05 -04002017 if ((errval = reiserfs_lookup_privroot(s)) ||
2018 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002019 dput(s->s_root);
2020 s->s_root = NULL;
2021 goto error;
2022 }
2023
2024 /* look for files which were to be removed in previous session */
2025 finish_unfinished(s);
2026 } else {
2027 if (old_format_only(s) && !silent) {
2028 reiserfs_info(s, "using 3.5.x disk format\n");
2029 }
2030
Al Viroedcc37a2009-05-03 06:00:05 -04002031 if ((errval = reiserfs_lookup_privroot(s)) ||
2032 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002033 dput(s->s_root);
2034 s->s_root = NULL;
2035 goto error;
2036 }
2037 }
2038 // mark hash in super block: it could be unset. overwrite should be ok
2039 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2040
2041 handle_attrs(s);
2042
2043 reiserfs_proc_info_init(s);
2044
2045 init_waitqueue_head(&(sbi->s_wait));
2046 spin_lock_init(&sbi->bitmap_lock);
2047
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02002048 reiserfs_write_unlock(s);
2049
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002050 return (0);
2051
Jan Kara00b441972008-07-25 01:46:38 -07002052error:
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04002053 reiserfs_write_unlock(s);
2054
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002055error_unlocked:
2056 /* kill the commit thread, free journal ram */
2057 if (jinit_done) {
2058 reiserfs_write_lock(s);
2059 journal_release_error(NULL, s);
2060 reiserfs_write_unlock(s);
2061 }
2062
Artem Bityutskiy033369d2012-06-01 17:18:08 +03002063 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
2064
Jeff Mahoney50652272006-09-30 23:28:44 -07002065 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002066 if (SB_BUFFER_WITH_SB(s))
2067 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07002069 {
2070 int j;
Jan Kara00b441972008-07-25 01:46:38 -07002071 for (j = 0; j < MAXQUOTAS; j++)
2072 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002073 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074#endif
James Lamanna833d3042005-10-30 15:00:16 -08002075 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002077 s->s_fs_info = NULL;
2078 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079}
2080
David Howells726c3342006-06-23 02:02:58 -07002081static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082{
David Howells726c3342006-06-23 02:02:58 -07002083 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002084
2085 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2086 buf->f_bfree = sb_free_blocks(rs);
2087 buf->f_bavail = buf->f_bfree;
2088 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07002089 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002090 /* changed to accommodate gcc folks. */
2091 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07002092 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2093 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2094 sizeof(rs->s_uuid)/2);
2095
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002096 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097}
2098
2099#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100static int reiserfs_write_dquot(struct dquot *dquot)
2101{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002102 struct reiserfs_transaction_handle th;
2103 int ret, err;
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;
2111 ret = dquot_commit(dquot);
2112 err =
2113 journal_end(&th, dquot->dq_sb,
2114 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2115 if (!ret && err)
2116 ret = err;
2117 out:
2118 reiserfs_write_unlock(dquot->dq_sb);
2119 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120}
2121
2122static int reiserfs_acquire_dquot(struct dquot *dquot)
2123{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002124 struct reiserfs_transaction_handle th;
2125 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002127 reiserfs_write_lock(dquot->dq_sb);
2128 ret =
2129 journal_begin(&th, dquot->dq_sb,
2130 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2131 if (ret)
2132 goto out;
2133 ret = dquot_acquire(dquot);
2134 err =
2135 journal_end(&th, dquot->dq_sb,
2136 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2137 if (!ret && err)
2138 ret = err;
2139 out:
2140 reiserfs_write_unlock(dquot->dq_sb);
2141 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142}
2143
2144static int reiserfs_release_dquot(struct dquot *dquot)
2145{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002146 struct reiserfs_transaction_handle th;
2147 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002149 reiserfs_write_lock(dquot->dq_sb);
2150 ret =
2151 journal_begin(&th, dquot->dq_sb,
2152 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara9c3013e2007-09-11 15:23:29 -07002153 if (ret) {
2154 /* Release dquot anyway to avoid endless cycle in dqput() */
2155 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002156 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07002157 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002158 ret = dquot_release(dquot);
2159 err =
2160 journal_end(&th, dquot->dq_sb,
2161 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2162 if (!ret && err)
2163 ret = err;
2164 out:
2165 reiserfs_write_unlock(dquot->dq_sb);
2166 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167}
2168
2169static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2170{
Jan Kara45065672008-07-25 01:46:37 -07002171 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002172 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2173 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2174 dquot_mark_dquot_dirty(dquot);
2175 return reiserfs_write_dquot(dquot);
2176 } else
2177 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002178}
2179
2180static int reiserfs_write_info(struct super_block *sb, int type)
2181{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002182 struct reiserfs_transaction_handle th;
2183 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002185 /* Data block + inode block */
2186 reiserfs_write_lock(sb);
2187 ret = journal_begin(&th, sb, 2);
2188 if (ret)
2189 goto out;
2190 ret = dquot_commit_info(sb, type);
2191 err = journal_end(&th, sb, 2);
2192 if (!ret && err)
2193 ret = err;
2194 out:
2195 reiserfs_write_unlock(sb);
2196 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197}
2198
2199/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002200 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201 */
2202static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2203{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002204 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2205 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206}
2207
2208/*
2209 * Standard function to be called on quota_on
2210 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002211static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Jan Karaf00c9e42010-09-15 17:38:58 +02002212 struct path *path)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002214 int err;
Jan Karad5dee5c2008-04-28 02:16:23 -07002215 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002216 struct reiserfs_transaction_handle th;
Jan Karac3aa0772011-12-21 20:17:10 +01002217 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218
Jan Karab9e06ef2012-11-13 16:34:17 +01002219 reiserfs_write_lock(sb);
2220 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2221 err = -EINVAL;
2222 goto out;
2223 }
Christoph Hellwig307ae182010-05-19 07:16:43 -04002224
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002225 /* Quotafile not on the same filesystem? */
Al Virod8c95842011-12-07 18:16:57 -05002226 if (path->dentry->d_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002227 err = -EXDEV;
2228 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002229 }
Jan Karaf00c9e42010-09-15 17:38:58 +02002230 inode = path->dentry->d_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002231 /* We must not pack tails for quota files on reiserfs for quota IO to work */
Jan Karad5dee5c2008-04-28 02:16:23 -07002232 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2233 err = reiserfs_unpack(inode, NULL);
2234 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002235 reiserfs_warning(sb, "super-6520",
2236 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002237 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002238 err = -EINVAL;
2239 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002240 }
2241 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002242 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002243 /* Journaling quota? */
2244 if (REISERFS_SB(sb)->s_qf_names[type]) {
2245 /* Quotafile not of fs root? */
Jan Karaf00c9e42010-09-15 17:38:58 +02002246 if (path->dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002247 reiserfs_warning(sb, "super-6521",
2248 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002249 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002250 }
2251
2252 /*
2253 * When we journal data on quota file, we have to flush journal to see
2254 * all updates to the file when we bypass pagecache...
2255 */
2256 if (reiserfs_file_data_log(inode)) {
2257 /* Just start temporary transaction and finish it */
2258 err = journal_begin(&th, sb, 1);
2259 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002260 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002261 err = journal_end_sync(&th, sb, 1);
2262 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002263 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002264 }
Jan Karab9e06ef2012-11-13 16:34:17 +01002265 reiserfs_write_unlock(sb);
2266 return dquot_quota_on(sb, type, format_id, path);
Al Viro77e69da2008-08-01 04:29:18 -04002267out:
Jan Karab9e06ef2012-11-13 16:34:17 +01002268 reiserfs_write_unlock(sb);
Al Viro77e69da2008-08-01 04:29:18 -04002269 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270}
2271
2272/* Read data from quotafile - avoid pagecache and such because we cannot afford
2273 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002274 * itself serializes the operations (and no one else should touch the files)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 * we don't have to be afraid of races */
2276static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2277 size_t len, loff_t off)
2278{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002279 struct inode *inode = sb_dqopt(sb)->files[type];
2280 unsigned long blk = off >> sb->s_blocksize_bits;
2281 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2282 size_t toread;
2283 struct buffer_head tmp_bh, *bh;
2284 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002286 if (off > i_size)
2287 return 0;
2288 if (off + len > i_size)
2289 len = i_size - off;
2290 toread = len;
2291 while (toread > 0) {
2292 tocopy =
2293 sb->s_blocksize - offset <
2294 toread ? sb->s_blocksize - offset : toread;
2295 tmp_bh.b_state = 0;
2296 /* Quota files are without tails so we can safely use this function */
2297 reiserfs_write_lock(sb);
2298 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2299 reiserfs_write_unlock(sb);
2300 if (err)
2301 return err;
2302 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2303 memset(data, 0, tocopy);
2304 else {
2305 bh = sb_bread(sb, tmp_bh.b_blocknr);
2306 if (!bh)
2307 return -EIO;
2308 memcpy(data, bh->b_data + offset, tocopy);
2309 brelse(bh);
2310 }
2311 offset = 0;
2312 toread -= tocopy;
2313 data += tocopy;
2314 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002315 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002316 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317}
2318
2319/* Write to quotafile (we know the transaction is already started and has
2320 * enough credits) */
2321static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2322 const char *data, size_t len, loff_t off)
2323{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002324 struct inode *inode = sb_dqopt(sb)->files[type];
2325 unsigned long blk = off >> sb->s_blocksize_bits;
2326 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2327 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2328 size_t towrite = len;
2329 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330
Jan Kara9c3013e2007-09-11 15:23:29 -07002331 if (!current->journal_info) {
2332 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2333 " cancelled because transaction is not started.\n",
2334 (unsigned long long)off, (unsigned long long)len);
2335 return -EIO;
2336 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002337 while (towrite > 0) {
2338 tocopy = sb->s_blocksize - offset < towrite ?
2339 sb->s_blocksize - offset : towrite;
2340 tmp_bh.b_state = 0;
2341 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2342 if (err)
2343 goto out;
2344 if (offset || tocopy != sb->s_blocksize)
2345 bh = sb_bread(sb, tmp_bh.b_blocknr);
2346 else
2347 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2348 if (!bh) {
2349 err = -EIO;
2350 goto out;
2351 }
2352 lock_buffer(bh);
2353 memcpy(bh->b_data + offset, data, tocopy);
2354 flush_dcache_page(bh->b_page);
2355 set_buffer_uptodate(bh);
2356 unlock_buffer(bh);
2357 reiserfs_prepare_for_journal(sb, bh, 1);
2358 journal_mark_dirty(current->journal_info, sb, bh);
2359 if (!journal_quota)
2360 reiserfs_add_ordered_list(inode, bh);
2361 brelse(bh);
2362 offset = 0;
2363 towrite -= tocopy;
2364 data += tocopy;
2365 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002367out:
Jan Kara67f16482012-04-25 21:28:12 +02002368 if (len == towrite)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002369 return err;
2370 if (inode->i_size < off + len - towrite)
2371 i_size_write(inode, off + len - towrite);
2372 inode->i_version++;
2373 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2374 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002375 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376}
2377
2378#endif
2379
Al Viro152a0832010-07-25 00:46:55 +04002380static struct dentry *get_super_block(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -07002381 int flags, const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04002382 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383{
Al Viro152a0832010-07-25 00:46:55 +04002384 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385}
2386
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002387static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388{
2389 int ret;
2390
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002391 if ((ret = init_inodecache())) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 return ret;
2393 }
2394
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002395 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002397 ret = register_filesystem(&reiserfs_fs_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002398
2399 if (ret == 0) {
2400 return 0;
2401 }
2402
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002403 reiserfs_proc_info_global_done();
2404 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405
2406 return ret;
2407}
2408
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002409static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002411 reiserfs_proc_info_global_done();
2412 unregister_filesystem(&reiserfs_fs_type);
2413 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414}
2415
2416struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002417 .owner = THIS_MODULE,
2418 .name = "reiserfs",
Al Viro152a0832010-07-25 00:46:55 +04002419 .mount = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002420 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002421 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422};
2423
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002424MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2425MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2426MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002428module_init(init_reiserfs_fs);
2429module_exit(exit_reiserfs_fs);