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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>
19#include <linux/reiserfs_fs.h>
20#include <linux/reiserfs_acl.h>
21#include <linux/reiserfs_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
71 reiserfs_write_lock(s);
72 if (!journal_begin(&th, s, 1))
73 if (!journal_end_sync(&th, s, 1))
74 reiserfs_flush_old_commits(s);
75 s->s_dirt = 0; /* Even if it's not true.
76 * We'll loop forever in sync_supers otherwise */
77 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070078 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079}
80
81static void reiserfs_write_super(struct super_block *s)
82{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070083 reiserfs_sync_fs(s, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084}
85
Takashi Satoc4be0c12009-01-09 16:40:58 -080086static int reiserfs_freeze(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070088 struct reiserfs_transaction_handle th;
89 reiserfs_write_lock(s);
90 if (!(s->s_flags & MS_RDONLY)) {
91 int err = journal_begin(&th, s, 1);
92 if (err) {
93 reiserfs_block_writes(&th);
94 } else {
95 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
96 1);
97 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
98 reiserfs_block_writes(&th);
99 journal_end_sync(&th, s, 1);
100 }
101 }
102 s->s_dirt = 0;
103 reiserfs_write_unlock(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800104 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105}
106
Takashi Satoc4be0c12009-01-09 16:40:58 -0800107static int reiserfs_unfreeze(struct super_block *s)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700108{
109 reiserfs_allow_writes(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800110 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111}
112
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700113extern const struct in_core_key MAX_IN_CORE_KEY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115/* this is used to delete "save link" when there are no items of a
116 file it points to. It can either happen if unlink is completed but
117 "save unlink" removal, or if file has both unlink and truncate
118 pending and as unlink completes first (because key of "save link"
119 protecting unlink is bigger that a key lf "save link" which
120 protects truncate), so there left no items to make truncate
121 completion on */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700122static int remove_save_link_only(struct super_block *s,
123 struct reiserfs_key *key, int oid_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700125 struct reiserfs_transaction_handle th;
126 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700128 /* we are going to do one balancing */
129 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
130 if (err)
131 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700133 reiserfs_delete_solid_item(&th, NULL, key);
134 if (oid_free)
135 /* removals are protected by direct items */
136 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
137
138 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141#ifdef CONFIG_QUOTA
142static int reiserfs_quota_on_mount(struct super_block *, int);
143#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145/* look for uncompleted unlinks and truncates and complete them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700146static int finish_unfinished(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700148 INITIALIZE_PATH(path);
149 struct cpu_key max_cpu_key, obj_key;
Lepton Wufb46f342007-10-16 23:30:04 -0700150 struct reiserfs_key save_link_key, last_inode_key;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700151 int retval = 0;
152 struct item_head *ih;
153 struct buffer_head *bh;
154 int item_pos;
155 char *item;
156 int done;
157 struct inode *inode;
158 int truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700160 int i;
161 int ms_active_set;
Jan Karaf4b113a2010-05-21 19:12:51 +0200162 int quota_enabled[MAXQUOTAS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700164
165 /* compose key to look for "save" links */
166 max_cpu_key.version = KEY_FORMAT_3_5;
167 max_cpu_key.on_disk_key.k_dir_id = ~0U;
168 max_cpu_key.on_disk_key.k_objectid = ~0U;
169 set_cpu_key_k_offset(&max_cpu_key, ~0U);
170 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Lepton Wufb46f342007-10-16 23:30:04 -0700172 memset(&last_inode_key, 0, sizeof(last_inode_key));
173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700175 /* Needed for iput() to work correctly and not trash data */
176 if (s->s_flags & MS_ACTIVE) {
177 ms_active_set = 0;
178 } else {
179 ms_active_set = 1;
180 s->s_flags |= MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700182 /* Turn on quotas so that they are updated correctly */
183 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200184 quota_enabled[i] = 1;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700185 if (REISERFS_SB(s)->s_qf_names[i]) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200186 int ret;
187
188 if (sb_has_quota_active(s, i)) {
189 quota_enabled[i] = 0;
190 continue;
191 }
192 ret = reiserfs_quota_on_mount(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700193 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400194 reiserfs_warning(s, "reiserfs-2500",
195 "cannot turn on journaled "
196 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700197 }
198 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700201 done = 0;
202 REISERFS_SB(s)->s_is_unlinked_ok = 1;
203 while (!retval) {
204 retval = search_item(s, &max_cpu_key, &path);
205 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400206 reiserfs_error(s, "vs-2140",
207 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700208 break;
209 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700211 bh = get_last_bh(&path);
212 item_pos = get_item_pos(&path);
213 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400214 reiserfs_warning(s, "vs-2060",
215 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700216 break;
217 }
218 item_pos--;
219 ih = B_N_PITEM_HEAD(bh, item_pos);
220
221 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
222 /* there are no "save" links anymore */
223 break;
224
225 save_link_key = ih->ih_key;
226 if (is_indirect_le_ih(ih))
227 truncate = 1;
228 else
229 truncate = 0;
230
231 /* reiserfs_iget needs k_dirid and k_objectid only */
232 item = B_I_PITEM(bh, ih);
233 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
234 obj_key.on_disk_key.k_objectid =
235 le32_to_cpu(ih->ih_key.k_objectid);
236 obj_key.on_disk_key.k_offset = 0;
237 obj_key.on_disk_key.k_type = 0;
238
239 pathrelse(&path);
240
241 inode = reiserfs_iget(s, &obj_key);
242 if (!inode) {
243 /* the unlink almost completed, it just did not manage to remove
244 "save" link and release objectid */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400245 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700246 &obj_key);
247 retval = remove_save_link_only(s, &save_link_key, 1);
248 continue;
249 }
250
251 if (!truncate && inode->i_nlink) {
252 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400253 reiserfs_warning(s, "vs-2185",
254 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700255 &obj_key);
256 retval = remove_save_link_only(s, &save_link_key, 0);
257 continue;
258 }
Christoph Hellwig871a2932010-03-03 09:05:07 -0500259 dquot_initialize(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700260
261 if (truncate && S_ISDIR(inode->i_mode)) {
262 /* We got a truncate request for a dir which is impossible.
263 The only imaginable way is to execute unfinished truncate request
264 then boot into old kernel, remove the file and create dir with
265 the same key. */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400266 reiserfs_warning(s, "green-2101",
267 "impossible truncate on a "
268 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700269 INODE_PKEY(inode));
270 retval = remove_save_link_only(s, &save_link_key, 0);
271 truncate = 0;
272 iput(inode);
273 continue;
274 }
275
276 if (truncate) {
277 REISERFS_I(inode)->i_flags |=
278 i_link_saved_truncate_mask;
279 /* not completed truncate found. New size was committed together
280 with "save" link */
281 reiserfs_info(s, "Truncating %k to %Ld ..",
282 INODE_PKEY(inode), inode->i_size);
283 reiserfs_truncate_file(inode,
284 0
285 /*don't update modification time */
286 );
287 retval = remove_save_link(inode, truncate);
288 } else {
289 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
290 /* not completed unlink (rmdir) found */
291 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700292 if (memcmp(&last_inode_key, INODE_PKEY(inode),
293 sizeof(last_inode_key))){
294 last_inode_key = *INODE_PKEY(inode);
295 /* removal gets completed in iput */
296 retval = 0;
297 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400298 reiserfs_warning(s, "super-2189", "Dead loop "
299 "in finish_unfinished "
300 "detected, just remove "
301 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700302 retval = remove_save_link_only(s,
303 &save_link_key, 0);
304 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700305 }
306
307 iput(inode);
308 printk("done\n");
309 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700311 REISERFS_SB(s)->s_is_unlinked_ok = 0;
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700314 /* Turn quotas off */
315 for (i = 0; i < MAXQUOTAS; i++) {
Jan Karaf4b113a2010-05-21 19:12:51 +0200316 if (sb_dqopt(s)->files[i] && quota_enabled[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400317 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700318 }
319 if (ms_active_set)
320 /* Restore the flag back */
321 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700323 pathrelse(&path);
324 if (done)
325 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
326 "Completed\n", done);
327 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330/* to protect file being unlinked from getting lost we "safe" link files
331 being unlinked. This link will be deleted in the same transaction with last
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200332 item of file. mounting the filesystem we scan all these links and remove
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 files which almost got lost */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700334void add_save_link(struct reiserfs_transaction_handle *th,
335 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700337 INITIALIZE_PATH(path);
338 int retval;
339 struct cpu_key key;
340 struct item_head ih;
341 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700343 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700345 /* file can only get one "save link" of each kind */
346 RFALSE(truncate &&
347 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
348 "saved link already exists for truncated inode %lx",
349 (long)inode->i_ino);
350 RFALSE(!truncate &&
351 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
352 "saved link already exists for unlinked inode %lx",
353 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700355 /* setup key of "save" link */
356 key.version = KEY_FORMAT_3_5;
357 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
358 key.on_disk_key.k_objectid = inode->i_ino;
359 if (!truncate) {
360 /* unlink, rmdir, rename */
361 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
362 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700364 /* item head of "safe" link */
365 make_le_item_head(&ih, &key, key.version,
366 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
367 4 /*length */ , 0xffff /*free space */ );
368 } else {
369 /* truncate */
370 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400371 reiserfs_warning(inode->i_sb, "green-2102",
372 "Adding a truncate savelink for "
373 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700374 INODE_PKEY(inode));
375 set_cpu_key_k_offset(&key, 1);
376 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700378 /* item head of "safe" link */
379 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
380 4 /*length */ , 0 /*free space */ );
381 }
382 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700384 /* look for its place in the tree */
385 retval = search_item(inode->i_sb, &key, &path);
386 if (retval != ITEM_NOT_FOUND) {
387 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400388 reiserfs_error(inode->i_sb, "vs-2100",
389 "search_by_key (%K) returned %d", &key,
390 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700391 pathrelse(&path);
392 return;
393 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700395 /* body of "save" link */
396 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300398 /* put "save" link into tree, don't charge quota to anyone */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700399 retval =
400 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
401 if (retval) {
402 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400403 reiserfs_error(inode->i_sb, "vs-2120",
404 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700405 } else {
406 if (truncate)
407 REISERFS_I(inode)->i_flags |=
408 i_link_saved_truncate_mask;
409 else
410 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
411 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412}
413
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700415int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700417 struct reiserfs_transaction_handle th;
418 struct reiserfs_key key;
419 int err;
420
421 /* we are going to do one balancing only */
422 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
423 if (err)
424 return err;
425
426 /* setup key of "save" link */
427 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
428 key.k_objectid = INODE_PKEY(inode)->k_objectid;
429 if (!truncate) {
430 /* unlink, rmdir, rename */
431 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
432 1 + inode->i_sb->s_blocksize);
433 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
434 } else {
435 /* truncate */
436 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
437 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
438 }
439
440 if ((truncate &&
441 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
442 (!truncate &&
443 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
444 /* don't take quota bytes from anywhere */
445 reiserfs_delete_solid_item(&th, NULL, &key);
446 if (!truncate) {
447 reiserfs_release_objectid(&th, inode->i_ino);
448 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
449 } else
450 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
451
452 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453}
454
David Howellsedc666e2006-10-11 01:22:14 -0700455static void reiserfs_kill_sb(struct super_block *s)
456{
457 if (REISERFS_SB(s)) {
Jeff Mahoneya9e36da2011-12-21 21:18:43 +0100458 /*
459 * Force any pending inode evictions to occur now. Any
460 * inodes to be removed that have extended attributes
461 * associated with them need to clean them up before
462 * we can release the extended attribute root dentries.
463 * shrink_dcache_for_umount will BUG if we don't release
464 * those before it's called so ->put_super is too late.
465 */
466 shrink_dcache_sb(s);
467
468 dput(REISERFS_SB(s)->xattr_root);
469 REISERFS_SB(s)->xattr_root = NULL;
470 dput(REISERFS_SB(s)->priv_root);
471 REISERFS_SB(s)->priv_root = NULL;
David Howellsedc666e2006-10-11 01:22:14 -0700472 }
473
474 kill_block_super(s);
475}
476
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700477static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700479 struct reiserfs_transaction_handle th;
480 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400482 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
483
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200484 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200485
Christoph Hellwig8c85e122009-04-28 18:00:26 +0200486 if (s->s_dirt)
487 reiserfs_write_super(s);
488
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700489 /* change file system state to current state if it was mounted with read-write permissions */
490 if (!(s->s_flags & MS_RDONLY)) {
491 if (!journal_begin(&th, s, 10)) {
492 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
493 1);
494 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
495 REISERFS_SB(s)->s_mount_state);
496 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
497 }
498 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700500 /* note, journal_release checks for readonly mount, and can decide not
501 ** to do a journal_end
502 */
503 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Jeff Mahoney50652272006-09-30 23:28:44 -0700505 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700507 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700509 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700511 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400512 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700513 REISERFS_SB(s)->reserved_blocks);
514 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700516 reiserfs_proc_info_done(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200518 reiserfs_write_unlock(s);
519 mutex_destroy(&REISERFS_SB(s)->lock);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700520 kfree(s->s_fs_info);
521 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522}
523
Christoph Lametere18b8902006-12-06 20:33:20 -0800524static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
526static struct inode *reiserfs_alloc_inode(struct super_block *sb)
527{
528 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700529 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800530 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 if (!ei)
532 return NULL;
Al Viro0e4f6a72010-07-04 12:18:57 +0400533 atomic_set(&ei->openers, 0);
534 mutex_init(&ei->tailpack);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 return &ei->vfs_inode;
536}
537
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100538static void reiserfs_i_callback(struct rcu_head *head)
539{
540 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100541 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
542}
543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544static void reiserfs_destroy_inode(struct inode *inode)
545{
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100546 call_rcu(&inode->i_rcu, reiserfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547}
548
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700549static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700551 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Christoph Lametera35afb82007-05-16 22:10:57 -0700553 INIT_LIST_HEAD(&ei->i_prealloc_list);
554 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557static int init_inodecache(void)
558{
559 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700560 sizeof(struct
561 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800562 0, (SLAB_RECLAIM_ACCOUNT|
563 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900564 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 if (reiserfs_inode_cachep == NULL)
566 return -ENOMEM;
567 return 0;
568}
569
570static void destroy_inodecache(void)
571{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700572 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573}
574
575/* we don't mark inodes dirty, we just log them */
Christoph Hellwigaa385722011-05-27 06:53:02 -0400576static void reiserfs_dirty_inode(struct inode *inode, int flags)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700577{
578 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700580 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200581 int lock_depth;
582
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700583 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400584 reiserfs_warning(inode->i_sb, "clm-6006",
585 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700586 inode->i_ino);
587 return;
588 }
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200589 lock_depth = reiserfs_write_lock_once(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700591 /* this is really only used for atime updates, so they don't have
592 ** to be included in O_SYNC or fsync
593 */
594 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200595 if (err)
596 goto out;
597
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700598 reiserfs_update_sd(&th, inode);
599 journal_end(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200600
601out:
602 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603}
604
Jan Karac3aa0772011-12-21 20:17:10 +0100605static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
606{
607 struct super_block *s = root->d_sb;
608 struct reiserfs_journal *journal = SB_JOURNAL(s);
609 long opts = REISERFS_SB(s)->s_mount_opt;
610
611 if (opts & (1 << REISERFS_LARGETAIL))
612 seq_puts(seq, ",tails=on");
613 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
614 seq_puts(seq, ",notail");
615 /* tails=small is default so we don't show it */
616
617 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
618 seq_puts(seq, ",barrier=none");
619 /* barrier=flush is default so we don't show it */
620
621 if (opts & (1 << REISERFS_ERROR_CONTINUE))
622 seq_puts(seq, ",errors=continue");
623 else if (opts & (1 << REISERFS_ERROR_PANIC))
624 seq_puts(seq, ",errors=panic");
625 /* errors=ro is default so we don't show it */
626
627 if (opts & (1 << REISERFS_DATA_LOG))
628 seq_puts(seq, ",data=journal");
629 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
630 seq_puts(seq, ",data=writeback");
631 /* data=ordered is default so we don't show it */
632
633 if (opts & (1 << REISERFS_ATTRS))
634 seq_puts(seq, ",attrs");
635
636 if (opts & (1 << REISERFS_XATTRS_USER))
637 seq_puts(seq, ",user_xattr");
638
639 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
640 seq_puts(seq, ",expose_privroot");
641
642 if (opts & (1 << REISERFS_POSIXACL))
643 seq_puts(seq, ",acl");
644
645 if (REISERFS_SB(s)->s_jdev)
646 seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
647
648 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
649 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
650
651#ifdef CONFIG_QUOTA
652 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
653 seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
654 else if (opts & (1 << REISERFS_USRQUOTA))
655 seq_puts(seq, ",usrquota");
656 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
657 seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
658 else if (opts & (1 << REISERFS_GRPQUOTA))
659 seq_puts(seq, ",grpquota");
660 if (REISERFS_SB(s)->s_jquota_fmt) {
661 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
662 seq_puts(seq, ",jqfmt=vfsold");
663 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
664 seq_puts(seq, ",jqfmt=vfsv0");
665 }
666#endif
667
668 /* Block allocator options */
669 if (opts & (1 << REISERFS_NO_BORDER))
670 seq_puts(seq, ",block-allocator=noborder");
671 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
672 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
673 if (opts & (1 << REISERFS_HASHED_RELOCATION))
674 seq_puts(seq, ",block-allocator=hashed_relocation");
675 if (opts & (1 << REISERFS_TEST4))
676 seq_puts(seq, ",block-allocator=test4");
677 show_alloc_options(seq, s);
678 return 0;
679}
680
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700682static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
683 size_t, loff_t);
684static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
685 loff_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686#endif
687
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800688static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700689 .alloc_inode = reiserfs_alloc_inode,
690 .destroy_inode = reiserfs_destroy_inode,
691 .write_inode = reiserfs_write_inode,
692 .dirty_inode = reiserfs_dirty_inode,
Al Viro845a2cc2010-06-07 11:37:37 -0400693 .evict_inode = reiserfs_evict_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700694 .put_super = reiserfs_put_super,
695 .write_super = reiserfs_write_super,
696 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800697 .freeze_fs = reiserfs_freeze,
698 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700699 .statfs = reiserfs_statfs,
700 .remount_fs = reiserfs_remount,
Jan Karac3aa0772011-12-21 20:17:10 +0100701 .show_options = reiserfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700703 .quota_read = reiserfs_quota_read,
704 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705#endif
706};
707
708#ifdef CONFIG_QUOTA
709#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
710
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711static int reiserfs_write_dquot(struct dquot *);
712static int reiserfs_acquire_dquot(struct dquot *);
713static int reiserfs_release_dquot(struct dquot *);
714static int reiserfs_mark_dquot_dirty(struct dquot *);
715static int reiserfs_write_info(struct super_block *, int);
Jan Karaf00c9e42010-09-15 17:38:58 +0200716static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700718static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700719 .write_dquot = reiserfs_write_dquot,
720 .acquire_dquot = reiserfs_acquire_dquot,
721 .release_dquot = reiserfs_release_dquot,
722 .mark_dirty = reiserfs_mark_dquot_dirty,
723 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100724 .alloc_dquot = dquot_alloc,
725 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726};
727
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700728static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700729 .quota_on = reiserfs_quota_on,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400730 .quota_off = dquot_quota_off,
731 .quota_sync = dquot_quota_sync,
732 .get_info = dquot_get_dqinfo,
733 .set_info = dquot_set_dqinfo,
734 .get_dqblk = dquot_get_dqblk,
735 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736};
737#endif
738
Christoph Hellwig39655162007-10-21 16:42:17 -0700739static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700740 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700741 .fh_to_dentry = reiserfs_fh_to_dentry,
742 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700743 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700744};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
746/* this struct is used in reiserfs_getopt () for containing the value for those
747 mount options that have values rather than being toggles. */
748typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700749 char *value;
750 int setmask; /* bitmask which is to set on mount_options bitmask when this
751 value is found, 0 is no bits are to be changed. */
752 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
753 value is found, 0 is no bits are to be changed. This is
754 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755} arg_desc_t;
756
757/* Set this bit in arg_required to allow empty arguments */
758#define REISERFS_OPT_ALLOWEMPTY 31
759
760/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
761 mount options */
762typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700763 char *option_name;
764 int arg_required; /* 0 if argument is not required, not 0 otherwise */
765 const arg_desc_t *values; /* list of values accepted by an option */
766 int setmask; /* bitmask which is to set on mount_options bitmask when this
767 value is found, 0 is no bits are to be changed. */
768 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
769 value is found, 0 is no bits are to be changed. This is
770 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771} opt_desc_t;
772
773/* possible values for -o data= */
774static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700775 {"ordered", 1 << REISERFS_DATA_ORDERED,
776 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
777 {"journal", 1 << REISERFS_DATA_LOG,
778 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
779 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
780 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800781 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782};
783
784/* possible values for -o barrier= */
785static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700786 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
787 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800788 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789};
790
791/* possible values for "-o block-allocator=" and bits which are to be set in
792 s_mount_opt of reiserfs specific part of in-core super block */
793static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700794 {"noborder", 1 << REISERFS_NO_BORDER, 0},
795 {"border", 0, 1 << REISERFS_NO_BORDER},
796 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
797 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
798 {"test4", 1 << REISERFS_TEST4, 0},
799 {"notest4", 0, 1 << REISERFS_TEST4},
800 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801};
802
803static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700804 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
805 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
806 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
807 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808};
809
810static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700811 {"panic", 1 << REISERFS_ERROR_PANIC,
812 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
813 {"ro-remount", 1 << REISERFS_ERROR_RO,
814 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700816 {"continue", 1 << REISERFS_ERROR_CONTINUE,
817 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700819 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820};
821
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822/* proceed only one option from a list *cur - string containing of mount options
823 opts - array of options which are accepted
824 opt_arg - if option is found and requires an argument and if it is specifed
825 in the input - pointer to the argument is stored here
826 bit_flags - if option requires to set a certain bit - it is set here
827 return -1 if unknown option is found, opt->arg_required otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700828static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
829 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700831 char *p;
Jeff Mahoney0222e652009-03-30 14:02:44 -0400832 /* foo=bar,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700833 ^ ^ ^
834 | | +-- option_end
835 | +-- arg_start
836 +-- option_start
837 */
838 const opt_desc_t *opt;
839 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700841 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700843 /* assume argument cannot contain commas */
844 *cur = strchr(p, ',');
845 if (*cur) {
846 *(*cur) = '\0';
847 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700850 if (!strncmp(p, "alloc=", 6)) {
851 /* Ugly special case, probably we should redo options parser so that
852 it can understand several arguments for some options, also so that
853 it can fill several bitfields with option values. */
854 if (reiserfs_parse_alloc_options(s, p + 6)) {
855 return -1;
856 } else {
857 return 0;
858 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700860
861 /* for every option in the list */
862 for (opt = opts; opt->option_name; opt++) {
863 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
864 if (bit_flags) {
865 if (opt->clrmask ==
866 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400867 reiserfs_warning(s, "super-6500",
868 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700869 p);
870 else
871 *bit_flags &= ~opt->clrmask;
872 if (opt->setmask ==
873 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400874 reiserfs_warning(s, "super-6501",
875 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700876 p);
877 else
878 *bit_flags |= opt->setmask;
879 }
880 break;
881 }
882 }
883 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400884 reiserfs_warning(s, "super-6502",
885 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700886 return -1;
887 }
888
889 p += strlen(opt->option_name);
890 switch (*p) {
891 case '=':
892 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400893 reiserfs_warning(s, "super-6503",
894 "the option \"%s\" does not "
895 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700896 opt->option_name);
897 return -1;
898 }
899 break;
900
901 case 0:
902 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400903 reiserfs_warning(s, "super-6504",
904 "the option \"%s\" requires an "
905 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700906 return -1;
907 }
908 break;
909 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400910 reiserfs_warning(s, "super-6505",
911 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700912 opt->option_name);
913 return -1;
914 }
915
916 /* move to the argument, or to next option if argument is not required */
917 p++;
918
919 if (opt->arg_required
920 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
921 && !strlen(p)) {
922 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400923 reiserfs_warning(s, "super-6506",
924 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700925 opt->option_name);
926 return -1;
927 }
928
929 if (!opt->values) {
930 /* *=NULLopt_arg contains pointer to argument */
931 *opt_arg = p;
932 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
933 }
934
935 /* values possible for this option are listed in opt->values */
936 for (arg = opt->values; arg->value; arg++) {
937 if (!strcmp(p, arg->value)) {
938 if (bit_flags) {
939 *bit_flags &= ~arg->clrmask;
940 *bit_flags |= arg->setmask;
941 }
942 return opt->arg_required;
943 }
944 }
945
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400946 reiserfs_warning(s, "super-6506",
947 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700948 opt->option_name);
949 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950}
951
952/* returns 0 if something is wrong in option string, 1 - otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700953static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
954 unsigned long *mount_options,
955 /* after the parsing phase, contains the
956 collection of bitflags defining what
957 mount options were selected. */
958 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
959 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -0700960 unsigned int *commit_max_age,
961 char **qf_names,
962 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700964 int c;
965 char *arg = NULL;
966 char *pos;
967 opt_desc_t opts[] = {
968 /* Compatibility stuff, so that -o notail for old setups still work */
969 {"tails",.arg_required = 't',.values = tails},
970 {"notail",.clrmask =
971 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
972 {"conv",.setmask = 1 << REISERFS_CONVERT},
973 {"attrs",.setmask = 1 << REISERFS_ATTRS},
974 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -0400975 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700977 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
978 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700980 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
981 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982#endif
983#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700984 {"acl",.setmask = 1 << REISERFS_POSIXACL},
985 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700987 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
988 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800990 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700991 {"replayonly",.setmask = 1 << REPLAYONLY},
992 {"block-allocator",.arg_required = 'a',.values = balloc},
993 {"data",.arg_required = 'd',.values = logging_mode},
994 {"barrier",.arg_required = 'b',.values = barrier_mode},
995 {"resize",.arg_required = 'r',.values = NULL},
996 {"jdev",.arg_required = 'j',.values = NULL},
997 {"nolargeio",.arg_required = 'w',.values = NULL},
998 {"commit",.arg_required = 'c',.values = NULL},
Jan Karac3aa0772011-12-21 20:17:10 +0100999 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1000 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1001 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001002 {"errors",.arg_required = 'e',.values = error_actions},
1003 {"usrjquota",.arg_required =
1004 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1005 {"grpjquota",.arg_required =
1006 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1007 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -08001008 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001009 };
1010
1011 *blocks = 0;
1012 if (!options || !*options)
1013 /* use default configuration: create tails, journaling on, no
1014 conversion to newest format */
1015 return 1;
1016
1017 for (pos = options; pos;) {
1018 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1019 if (c == -1)
1020 /* wrong option is given */
1021 return 0;
1022
1023 if (c == 'r') {
1024 char *p;
1025
1026 p = NULL;
1027 /* "resize=NNN" or "resize=auto" */
1028
1029 if (!strcmp(arg, "auto")) {
1030 /* From JFS code, to auto-get the size. */
1031 *blocks =
1032 s->s_bdev->bd_inode->i_size >> s->
1033 s_blocksize_bits;
1034 } else {
1035 *blocks = simple_strtoul(arg, &p, 0);
1036 if (*p != '\0') {
1037 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001038 reiserfs_warning(s, "super-6507",
1039 "bad value %s for "
1040 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001041 return 0;
1042 }
1043 }
1044 }
1045
1046 if (c == 'c') {
1047 char *p = NULL;
1048 unsigned long val = simple_strtoul(arg, &p, 0);
1049 /* commit=NNN (time in seconds) */
1050 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001051 reiserfs_warning(s, "super-6508",
1052 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001053 arg);
1054 return 0;
1055 }
1056 *commit_max_age = (unsigned int)val;
1057 }
1058
1059 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001060 reiserfs_warning(s, "super-6509", "nolargeio option "
1061 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -07001062 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001063 }
1064
1065 if (c == 'j') {
1066 if (arg && *arg && jdev_name) {
1067 if (*jdev_name) { //Hm, already assigned?
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001068 reiserfs_warning(s, "super-6510",
1069 "journal device was "
1070 "already specified to "
1071 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001072 return 0;
1073 }
1074 *jdev_name = arg;
1075 }
1076 }
1077#ifdef CONFIG_QUOTA
1078 if (c == 'u' || c == 'g') {
1079 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1080
Jan Kara6929f892008-08-20 18:16:36 +02001081 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001082 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001083 reiserfs_warning(s, "super-6511",
1084 "cannot change journaled "
1085 "quota options when quota "
1086 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001087 return 0;
1088 }
1089 if (*arg) { /* Some filename specified? */
1090 if (REISERFS_SB(s)->s_qf_names[qtype]
1091 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1092 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001093 reiserfs_warning(s, "super-6512",
1094 "%s quota file "
1095 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001096 QTYPE2NAME(qtype));
1097 return 0;
1098 }
1099 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001100 reiserfs_warning(s, "super-6513",
1101 "quotafile must be "
1102 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001103 return 0;
1104 }
Jan Kara00b44192008-07-25 01:46:38 -07001105 qf_names[qtype] =
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001106 kmalloc(strlen(arg) + 1, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001107 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001108 reiserfs_warning(s, "reiserfs-2502",
1109 "not enough memory "
1110 "for storing "
1111 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001112 return 0;
1113 }
Jan Kara00b44192008-07-25 01:46:38 -07001114 strcpy(qf_names[qtype], arg);
Jan Karac3aa0772011-12-21 20:17:10 +01001115 if (qtype == USRQUOTA)
1116 *mount_options |= 1 << REISERFS_USRQUOTA;
1117 else
1118 *mount_options |= 1 << REISERFS_GRPQUOTA;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001119 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001120 if (qf_names[qtype] !=
1121 REISERFS_SB(s)->s_qf_names[qtype])
1122 kfree(qf_names[qtype]);
1123 qf_names[qtype] = NULL;
Jan Karac3aa0772011-12-21 20:17:10 +01001124 if (qtype == USRQUOTA)
1125 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1126 else
1127 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001128 }
1129 }
1130 if (c == 'f') {
1131 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001132 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001133 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001134 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001135 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001136 reiserfs_warning(s, "super-6514",
1137 "unknown quota format "
1138 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001139 return 0;
1140 }
Jan Kara6929f892008-08-20 18:16:36 +02001141 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001142 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001143 reiserfs_warning(s, "super-6515",
1144 "cannot change journaled "
1145 "quota options when quota "
1146 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001147 return 0;
1148 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001149 }
1150#else
1151 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001152 reiserfs_warning(s, "reiserfs-2503", "journaled "
1153 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001154 return 0;
1155 }
1156#endif
1157 }
1158
1159#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001160 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1161 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001162 reiserfs_warning(s, "super-6515",
1163 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001164 return 0;
1165 }
Jan Karac3aa0772011-12-21 20:17:10 +01001166 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1167 sb_has_quota_loaded(s, USRQUOTA)) ||
1168 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1169 sb_has_quota_loaded(s, GRPQUOTA))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001170 reiserfs_warning(s, "super-6516", "quota options must "
1171 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001172 return 0;
1173 }
1174#endif
1175
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177}
1178
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001179static void switch_data_mode(struct super_block *s, unsigned long mode)
1180{
1181 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1182 (1 << REISERFS_DATA_ORDERED) |
1183 (1 << REISERFS_DATA_WRITEBACK));
1184 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185}
1186
1187static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1188{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001189 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1190 if (!reiserfs_data_log(s)) {
1191 switch_data_mode(s, REISERFS_DATA_LOG);
1192 reiserfs_info(s, "switching to journaled data mode\n");
1193 }
1194 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1195 if (!reiserfs_data_ordered(s)) {
1196 switch_data_mode(s, REISERFS_DATA_ORDERED);
1197 reiserfs_info(s, "switching to ordered data mode\n");
1198 }
1199 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1200 if (!reiserfs_data_writeback(s)) {
1201 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1202 reiserfs_info(s, "switching to writeback data mode\n");
1203 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205}
1206
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001207static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001209 int flush = (1 << REISERFS_BARRIER_FLUSH);
1210 int none = (1 << REISERFS_BARRIER_NONE);
1211 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001213 if (bits & all_barrier) {
1214 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1215 if (bits & flush) {
1216 REISERFS_SB(s)->s_mount_opt |= flush;
1217 printk("reiserfs: enabling write barrier flush mode\n");
1218 } else if (bits & none) {
1219 REISERFS_SB(s)->s_mount_opt |= none;
1220 printk("reiserfs: write barriers turned off\n");
1221 }
1222 }
1223}
1224
1225static void handle_attrs(struct super_block *s)
1226{
1227 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1228
1229 if (reiserfs_attrs(s)) {
1230 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001231 reiserfs_warning(s, "super-6517", "cannot support "
1232 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001233 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 return;
1235 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001236 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001237 reiserfs_warning(s, "super-6518", "cannot support "
1238 "attributes until flag is set in "
1239 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001240 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 }
1242 }
1243}
1244
Jan Kara00b44192008-07-25 01:46:38 -07001245#ifdef CONFIG_QUOTA
1246static void handle_quota_files(struct super_block *s, char **qf_names,
1247 unsigned int *qfmt)
1248{
1249 int i;
1250
1251 for (i = 0; i < MAXQUOTAS; i++) {
1252 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1253 kfree(REISERFS_SB(s)->s_qf_names[i]);
1254 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1255 }
Jan Karaa06d7892011-12-21 17:35:34 +01001256 if (*qfmt)
1257 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
Jan Kara00b44192008-07-25 01:46:38 -07001258}
1259#endif
1260
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001261static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001263 struct reiserfs_super_block *rs;
1264 struct reiserfs_transaction_handle th;
1265 unsigned long blocks;
1266 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1267 unsigned long safe_mask = 0;
1268 unsigned int commit_max_age = (unsigned int)-1;
1269 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001270 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001271 int err;
Jan Kara00b44192008-07-25 01:46:38 -07001272 char *qf_names[MAXQUOTAS];
1273 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001275 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001276#endif
Jan Kara00b44192008-07-25 01:46:38 -07001277
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001278 reiserfs_write_lock(s);
1279
1280#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001281 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282#endif
1283
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001284 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001286 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001287 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1288 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001290 for (i = 0; i < MAXQUOTAS; i++)
1291 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1292 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001293#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001294 err = -EINVAL;
1295 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 }
Jan Kara00b44192008-07-25 01:46:38 -07001297#ifdef CONFIG_QUOTA
1298 handle_quota_files(s, qf_names, &qfmt);
1299#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001301 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001303 /* Add options that are safe here */
1304 safe_mask |= 1 << REISERFS_SMALLTAIL;
1305 safe_mask |= 1 << REISERFS_LARGETAIL;
1306 safe_mask |= 1 << REISERFS_NO_BORDER;
1307 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1308 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1309 safe_mask |= 1 << REISERFS_TEST4;
1310 safe_mask |= 1 << REISERFS_ATTRS;
1311 safe_mask |= 1 << REISERFS_XATTRS_USER;
1312 safe_mask |= 1 << REISERFS_POSIXACL;
1313 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1314 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1315 safe_mask |= 1 << REISERFS_ERROR_RO;
1316 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1317 safe_mask |= 1 << REISERFS_ERROR_PANIC;
Jan Karac3aa0772011-12-21 20:17:10 +01001318 safe_mask |= 1 << REISERFS_USRQUOTA;
1319 safe_mask |= 1 << REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001321 /* Update the bitmask, taking care to keep
1322 * the bits we're not allowed to change here */
1323 REISERFS_SB(s)->s_mount_opt =
1324 (REISERFS_SB(s)->
1325 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001327 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1328 journal->j_max_commit_age = commit_max_age;
1329 journal->j_max_trans_age = commit_max_age;
1330 } else if (commit_max_age == 0) {
1331 /* 0 means restore defaults. */
1332 journal->j_max_commit_age = journal->j_default_max_commit_age;
1333 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1334 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001336 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001337 err = reiserfs_resize(s, blocks);
1338 if (err != 0)
1339 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001340 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001342 if (*mount_flags & MS_RDONLY) {
1343 reiserfs_xattr_init(s, *mount_flags);
1344 /* remount read-only */
1345 if (s->s_flags & MS_RDONLY)
1346 /* it is read-only already */
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001347 goto out_ok;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001348
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001349 err = dquot_suspend(s, -1);
1350 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001351 goto out_err;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001352
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001353 /* try to remount file system with read-only permissions */
1354 if (sb_umount_state(rs) == REISERFS_VALID_FS
1355 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001356 goto out_ok;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001357 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001359 err = journal_begin(&th, s, 10);
1360 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001361 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001363 /* Mounting a rw partition read-only. */
1364 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1365 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1366 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1367 } else {
1368 /* remount read-write */
1369 if (!(s->s_flags & MS_RDONLY)) {
1370 reiserfs_xattr_init(s, *mount_flags);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001371 goto out_ok; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001372 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001374 if (reiserfs_is_journal_aborted(journal)) {
1375 err = journal->j_errno;
1376 goto out_err;
1377 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001379 handle_data_mode(s, mount_options);
1380 handle_barrier_mode(s, mount_options);
1381 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1382 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1383 err = journal_begin(&th, s, 10);
1384 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001385 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001387 /* Mount a partition which is read-only, read-write */
1388 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1389 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1390 s->s_flags &= ~MS_RDONLY;
1391 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001392 if (!old_format_only(s))
1393 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001394 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1395 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1396 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1397 }
1398 /* this will force a full flush of all journal lists */
1399 SB_JOURNAL(s)->j_must_wait = 1;
1400 err = journal_end(&th, s, 10);
1401 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001402 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001403 s->s_dirt = 0;
1404
1405 if (!(*mount_flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001406 dquot_resume(s, -1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001407 finish_unfinished(s);
1408 reiserfs_xattr_init(s, *mount_flags);
1409 }
1410
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001411out_ok:
Al Viro2a32ceb2009-05-08 16:05:57 -04001412 replace_mount_options(s, new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001413 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001414 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001415
1416out_err:
1417 kfree(new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001418 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001419 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420}
1421
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001422static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001424 struct buffer_head *bh;
1425 struct reiserfs_super_block *rs;
1426 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001428 bh = sb_bread(s, offset / s->s_blocksize);
1429 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001430 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001431 "bread failed (dev %s, block %lu, size %lu)",
1432 reiserfs_bdevname(s), offset / s->s_blocksize,
1433 s->s_blocksize);
1434 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001437 rs = (struct reiserfs_super_block *)bh->b_data;
1438 if (!is_any_reiserfs_magic_string(rs)) {
1439 brelse(bh);
1440 return 1;
1441 }
1442 //
1443 // ok, reiserfs signature (old or new) found in at the given offset
Jeff Mahoney0222e652009-03-30 14:02:44 -04001444 //
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001445 fs_blocksize = sb_blocksize(rs);
1446 brelse(bh);
1447 sb_set_blocksize(s, fs_blocksize);
1448
1449 bh = sb_bread(s, offset / s->s_blocksize);
1450 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001451 reiserfs_warning(s, "sh-2007",
1452 "bread failed (dev %s, block %lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001453 reiserfs_bdevname(s), offset / s->s_blocksize,
1454 s->s_blocksize);
1455 return 1;
1456 }
1457
1458 rs = (struct reiserfs_super_block *)bh->b_data;
1459 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001460 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1461 "filesystem on (dev %s, block %Lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001462 reiserfs_bdevname(s),
1463 (unsigned long long)bh->b_blocknr,
1464 s->s_blocksize);
1465 brelse(bh);
1466 return 1;
1467 }
1468
1469 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1470 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001471 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1472 "--rebuild-tree run detected. Please run\n"
1473 "reiserfsck --rebuild-tree and wait for a "
1474 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001475 "get newer reiserfsprogs package");
1476 return 1;
1477 }
1478
1479 SB_BUFFER_WITH_SB(s) = bh;
1480 SB_DISK_SUPER_BLOCK(s) = rs;
1481
1482 if (is_reiserfs_jr(rs)) {
1483 /* magic is of non-standard journal filesystem, look at s_version to
1484 find which format is in use */
1485 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001486 reiserfs_info(s, "found reiserfs format \"3.6\""
1487 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001488 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001489 reiserfs_info(s, "found reiserfs format \"3.5\""
1490 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001491 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001492 reiserfs_warning(s, "sh-2012", "found unknown "
1493 "format \"%u\" of reiserfs with "
1494 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001495 return 1;
1496 }
1497 } else
1498 /* s_version of standard format may contain incorrect information,
1499 so we just look at the magic string */
1500 reiserfs_info(s,
1501 "found reiserfs format \"%s\" with standard journal\n",
1502 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1503
1504 s->s_op = &reiserfs_sops;
1505 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001507 s->s_qcop = &reiserfs_qctl_operations;
1508 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509#endif
1510
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001511 /* new format is limited by the 32 bit wide i_blocks field, want to
1512 ** be one full block below that.
1513 */
1514 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1515 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516}
1517
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001519static int reread_meta_blocks(struct super_block *s)
1520{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001521 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1522 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1523 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001524 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001525 return 1;
1526 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001528 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529}
1530
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531/////////////////////////////////////////////////////
1532// hash detection stuff
1533
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534// if root directory is empty - we set default - Yura's - hash and
1535// warn about it
1536// FIXME: we look for only one name in a directory. If tea and yura
1537// bith have the same value - we ask user to send report to the
1538// mailing list
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001539static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001541 int retval;
1542 struct inode *inode;
1543 struct cpu_key key;
1544 INITIALIZE_PATH(path);
1545 struct reiserfs_dir_entry de;
1546 __u32 hash = DEFAULT_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001548 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001550 do { // Some serious "goto"-hater was there ;)
1551 u32 teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001553 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1554 retval = search_by_entry_key(s, &key, &path, &de);
1555 if (retval == IO_ERROR) {
1556 pathrelse(&path);
1557 return UNSET_HASH;
1558 }
1559 if (retval == NAME_NOT_FOUND)
1560 de.de_entry_num--;
1561 set_de_name_and_namelen(&de);
1562 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1563 /* allow override in this case */
1564 if (reiserfs_rupasov_hash(s)) {
1565 hash = YURA_HASH;
1566 }
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001567 reiserfs_info(s, "FS seems to be empty, autodetect "
1568 "is using the default hash\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001569 break;
1570 }
1571 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1572 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1573 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1574 if (((teahash == r5hash)
1575 &&
1576 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1577 == r5hash)) || ((teahash == yurahash)
1578 && (yurahash ==
1579 GET_HASH_VALUE(deh_offset
1580 (&
1581 (de.
1582 de_deh[de.
1583 de_entry_num])))))
1584 || ((r5hash == yurahash)
1585 && (yurahash ==
1586 GET_HASH_VALUE(deh_offset
1587 (&(de.de_deh[de.de_entry_num])))))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001588 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1589 "automatically detect hash function. "
1590 "Please mount with -o "
1591 "hash={tea,rupasov,r5}");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001592 hash = UNSET_HASH;
1593 break;
1594 }
1595 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1596 yurahash)
1597 hash = YURA_HASH;
1598 else if (GET_HASH_VALUE
1599 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1600 hash = TEA_HASH;
1601 else if (GET_HASH_VALUE
1602 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1603 hash = R5_HASH;
1604 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001605 reiserfs_warning(s, "reiserfs-2506",
1606 "Unrecognised hash function");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001607 hash = UNSET_HASH;
1608 }
1609 } while (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001611 pathrelse(&path);
1612 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613}
1614
1615// finds out which hash names are sorted with
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001616static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001618 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001620 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001622 /* reiserfs_hash_detect() == true if any of the hash mount options
1623 ** were used. We must check them to make sure the user isn't
1624 ** using a bad hash value
1625 */
1626 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1627 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001629 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney0222e652009-03-30 14:02:44 -04001630 /* detection has found the hash, and we must check against the
1631 ** mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001632 */
1633 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001634 reiserfs_warning(s, "reiserfs-2507",
1635 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001636 "unable to force rupasov hash",
1637 reiserfs_hashname(code));
1638 code = UNSET_HASH;
1639 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001640 reiserfs_warning(s, "reiserfs-2508",
1641 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001642 "unable to force tea hash",
1643 reiserfs_hashname(code));
1644 code = UNSET_HASH;
1645 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001646 reiserfs_warning(s, "reiserfs-2509",
1647 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001648 "unable to force r5 hash",
1649 reiserfs_hashname(code));
1650 code = UNSET_HASH;
1651 }
1652 } else {
1653 /* find_hash_out was not called or could not determine the hash */
1654 if (reiserfs_rupasov_hash(s)) {
1655 code = YURA_HASH;
1656 } else if (reiserfs_tea_hash(s)) {
1657 code = TEA_HASH;
1658 } else if (reiserfs_r5_hash(s)) {
1659 code = R5_HASH;
1660 }
1661 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662
Jeff Mahoney0222e652009-03-30 14:02:44 -04001663 /* if we are mounted RW, and we have a new valid hash code, update
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001664 ** the super
1665 */
1666 if (code != UNSET_HASH &&
1667 !(s->s_flags & MS_RDONLY) &&
1668 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1669 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1670 }
1671 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672}
1673
1674// return pointer to appropriate function
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001675static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001677 switch (what_hash(s)) {
1678 case TEA_HASH:
1679 reiserfs_info(s, "Using tea hash to sort names\n");
1680 return keyed_hash;
1681 case YURA_HASH:
1682 reiserfs_info(s, "Using rupasov hash to sort names\n");
1683 return yura_hash;
1684 case R5_HASH:
1685 reiserfs_info(s, "Using r5 hash to sort names\n");
1686 return r5_hash;
1687 }
1688 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689}
1690
1691// this is used to set up correct value for old partitions
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001692static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001694 if (func == keyed_hash)
1695 return TEA_HASH;
1696 if (func == yura_hash)
1697 return YURA_HASH;
1698 if (func == r5_hash)
1699 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001701 BUG(); // should never happen
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001703 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704}
1705
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001706#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001708 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001710static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001712 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001713 struct reiserfs_transaction_handle th;
1714 int old_format = 0;
1715 unsigned long blocks;
1716 unsigned int commit_max_age = 0;
1717 int jinit_done = 0;
1718 struct reiserfs_iget_args args;
1719 struct reiserfs_super_block *rs;
1720 char *jdev_name;
1721 struct reiserfs_sb_info *sbi;
1722 int errval = -EINVAL;
Jan Kara00b44192008-07-25 01:46:38 -07001723 char *qf_names[MAXQUOTAS] = {};
1724 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001726 save_mount_options(s, data);
1727
Yan Burman01afb212006-12-06 20:39:01 -08001728 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001729 if (!sbi)
1730 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001731 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001732 /* Set default values for options: non-aggressive tails, RO on errors */
1733 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1734 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
Christoph Hellwigb4d5b102011-07-16 16:47:00 -04001735 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001736 /* no preallocation minimum, be smart in
1737 reiserfs_file_write instead */
1738 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1739 /* Preallocate by 16 blocks (17-1) at once */
1740 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001741 /* setup default block allocator options */
1742 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001744 mutex_init(&REISERFS_SB(s)->lock);
1745 REISERFS_SB(s)->lock_depth = -1;
1746
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001747 jdev_name = NULL;
1748 if (reiserfs_parse_options
1749 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001750 &commit_max_age, qf_names, &qfmt) == 0) {
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001751 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001752 }
Jan Karac3aa0772011-12-21 20:17:10 +01001753 if (jdev_name && jdev_name[0]) {
1754 REISERFS_SB(s)->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1755 if (!REISERFS_SB(s)->s_jdev) {
1756 SWARN(silent, s, "", "Cannot allocate memory for "
1757 "journal device name");
1758 goto error;
1759 }
1760 }
Jan Kara00b44192008-07-25 01:46:38 -07001761#ifdef CONFIG_QUOTA
1762 handle_quota_files(s, qf_names, &qfmt);
1763#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001765 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001766 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001767 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001768 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001770 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1771 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1772 old_format = 1;
1773 /* try new format (64-th 1k block), which can contain reiserfs super block */
1774 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001775 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001776 reiserfs_bdevname(s));
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001777 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001778 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001780 rs = SB_DISK_SUPER_BLOCK(s);
1781 /* Let's do basic sanity check to verify that underlying device is not
1782 smaller than the filesystem. If the check fails then abort and scream,
1783 because bad stuff will happen otherwise. */
1784 if (s->s_bdev && s->s_bdev->bd_inode
1785 && i_size_read(s->s_bdev->bd_inode) <
1786 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001787 SWARN(silent, s, "", "Filesystem cannot be "
1788 "mounted because it is bigger than the device");
1789 SWARN(silent, s, "", "You may need to run fsck "
1790 "or increase size of your LVM partition");
1791 SWARN(silent, s, "", "Or may be you forgot to "
1792 "reboot after fdisk when it told you to");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001793 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001794 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001796 sbi->s_mount_state = SB_REISERFS_STATE(s);
1797 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798
Jeff Mahoney6f010462006-09-30 23:28:43 -07001799 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001800 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001801 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001802 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001803
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001804 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001806 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1807 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808#endif
1809
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001810 /* make data=ordered the default */
1811 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1812 !reiserfs_data_writeback(s)) {
1813 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 }
1815
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001816 if (reiserfs_data_log(s)) {
1817 reiserfs_info(s, "using journaled data mode\n");
1818 } else if (reiserfs_data_ordered(s)) {
1819 reiserfs_info(s, "using ordered data mode\n");
1820 } else {
1821 reiserfs_info(s, "using writeback data mode\n");
1822 }
1823 if (reiserfs_barrier_flush(s)) {
1824 printk("reiserfs: using flush barriers\n");
1825 }
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08001826
Frederic Weisbecker37c69b92012-01-10 15:11:09 -08001827 // set_device_ro(s->s_dev, 1) ;
1828 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1829 SWARN(silent, s, "sh-2022",
1830 "unable to initialize journal space");
1831 goto error_unlocked;
1832 } else {
1833 jinit_done = 1; /* once this is set, journal_release must be called
1834 ** if we error out of the mount
1835 */
1836 }
1837
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001838 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001839 SWARN(silent, s, "jmacd-9",
1840 "unable to reread meta blocks after journal init");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001841 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 }
1843
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001844 if (replay_only(s))
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001845 goto error_unlocked;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001846
1847 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001848 SWARN(silent, s, "clm-7000",
1849 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001850 s->s_flags |= MS_RDONLY;
1851 }
1852 args.objectid = REISERFS_ROOT_OBJECTID;
1853 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1854 root_inode =
1855 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1856 reiserfs_init_locked_inode, (void *)(&args));
1857 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001858 SWARN(silent, s, "jmacd-10", "get root inode failed");
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001859 goto error_unlocked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860 }
1861
Frederic Weisbecker9b467e62012-01-10 15:11:11 -08001862 /*
1863 * This path assumed to be called with the BKL in the old times.
1864 * Now we have inherited the big reiserfs lock from it and many
1865 * reiserfs helpers called in the mount path and elsewhere require
1866 * this lock to be held even if it's not always necessary. Let's be
1867 * conservative and hold it early. The window can be reduced after
1868 * careful review of the code.
1869 */
1870 reiserfs_write_lock(s);
1871
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001872 if (root_inode->i_state & I_NEW) {
1873 reiserfs_read_locked_inode(root_inode, &args);
1874 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 }
1876
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001877 s->s_root = d_alloc_root(root_inode);
1878 if (!s->s_root) {
1879 iput(root_inode);
1880 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001882 // define and initialize hash function
1883 sbi->s_hash_function = hash_function(s);
1884 if (sbi->s_hash_function == NULL) {
1885 dput(s->s_root);
1886 s->s_root = NULL;
1887 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001889
1890 if (is_reiserfs_3_5(rs)
1891 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1892 set_bit(REISERFS_3_5, &(sbi->s_properties));
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07001893 else if (old_format)
1894 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001895 else
1896 set_bit(REISERFS_3_6, &(sbi->s_properties));
1897
1898 if (!(s->s_flags & MS_RDONLY)) {
1899
1900 errval = journal_begin(&th, s, 1);
1901 if (errval) {
1902 dput(s->s_root);
1903 s->s_root = NULL;
1904 goto error;
1905 }
1906 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1907
1908 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1909 set_sb_fs_state(rs, 0);
1910
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001911 /* Clear out s_bmap_nr if it would wrap. We can handle this
1912 * case, but older revisions can't. This will cause the
1913 * file system to fail mount on those older implementations,
1914 * avoiding corruption. -jeffm */
1915 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1916 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001917 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001918 "claims to use %u bitmap blocks in "
1919 "its super block, but requires %u. "
1920 "Clearing to zero.", sb_bmap_nr(rs),
1921 reiserfs_bmap_count(s));
1922
1923 set_sb_bmap_nr(rs, 0);
1924 }
1925
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001926 if (old_format_only(s)) {
1927 /* filesystem of format 3.5 either with standard or non-standard
1928 journal */
1929 if (convert_reiserfs(s)) {
1930 /* and -o conv is given */
1931 if (!silent)
1932 reiserfs_info(s,
1933 "converting 3.5 filesystem to the 3.6 format");
1934
1935 if (is_reiserfs_3_5(rs))
1936 /* put magic string of 3.6 format. 2.2 will not be able to
1937 mount this filesystem anymore */
1938 memcpy(rs->s_v1.s_magic,
1939 reiserfs_3_6_magic_string,
1940 sizeof
1941 (reiserfs_3_6_magic_string));
1942
1943 set_sb_version(rs, REISERFS_VERSION_2);
1944 reiserfs_convert_objectid_map_v1(s);
1945 set_bit(REISERFS_3_6, &(sbi->s_properties));
1946 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1947 } else if (!silent) {
1948 reiserfs_info(s, "using 3.5.x disk format\n");
1949 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001950 } else
1951 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1952
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001953
1954 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1955 errval = journal_end(&th, s, 1);
1956 if (errval) {
1957 dput(s->s_root);
1958 s->s_root = NULL;
1959 goto error;
1960 }
1961
Al Viroedcc37a2009-05-03 06:00:05 -04001962 if ((errval = reiserfs_lookup_privroot(s)) ||
1963 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001964 dput(s->s_root);
1965 s->s_root = NULL;
1966 goto error;
1967 }
1968
1969 /* look for files which were to be removed in previous session */
1970 finish_unfinished(s);
1971 } else {
1972 if (old_format_only(s) && !silent) {
1973 reiserfs_info(s, "using 3.5.x disk format\n");
1974 }
1975
Al Viroedcc37a2009-05-03 06:00:05 -04001976 if ((errval = reiserfs_lookup_privroot(s)) ||
1977 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001978 dput(s->s_root);
1979 s->s_root = NULL;
1980 goto error;
1981 }
1982 }
1983 // mark hash in super block: it could be unset. overwrite should be ok
1984 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1985
1986 handle_attrs(s);
1987
1988 reiserfs_proc_info_init(s);
1989
1990 init_waitqueue_head(&(sbi->s_wait));
1991 spin_lock_init(&sbi->bitmap_lock);
1992
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001993 reiserfs_write_unlock(s);
1994
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001995 return (0);
1996
Jan Kara00b44192008-07-25 01:46:38 -07001997error:
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001998 reiserfs_write_unlock(s);
1999
Frederic Weisbeckerf32485b2012-01-10 15:11:07 -08002000error_unlocked:
2001 /* kill the commit thread, free journal ram */
2002 if (jinit_done) {
2003 reiserfs_write_lock(s);
2004 journal_release_error(NULL, s);
2005 reiserfs_write_unlock(s);
2006 }
2007
Jeff Mahoney50652272006-09-30 23:28:44 -07002008 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002009 if (SB_BUFFER_WITH_SB(s))
2010 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07002012 {
2013 int j;
Jan Kara00b44192008-07-25 01:46:38 -07002014 for (j = 0; j < MAXQUOTAS; j++)
2015 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002016 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017#endif
James Lamanna833d3042005-10-30 15:00:16 -08002018 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002020 s->s_fs_info = NULL;
2021 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022}
2023
David Howells726c3342006-06-23 02:02:58 -07002024static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025{
David Howells726c3342006-06-23 02:02:58 -07002026 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002027
2028 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2029 buf->f_bfree = sb_free_blocks(rs);
2030 buf->f_bavail = buf->f_bfree;
2031 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07002032 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002033 /* changed to accommodate gcc folks. */
2034 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07002035 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2036 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2037 sizeof(rs->s_uuid)/2);
2038
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002039 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040}
2041
2042#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043static int reiserfs_write_dquot(struct dquot *dquot)
2044{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002045 struct reiserfs_transaction_handle th;
2046 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002048 reiserfs_write_lock(dquot->dq_sb);
2049 ret =
2050 journal_begin(&th, dquot->dq_sb,
2051 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2052 if (ret)
2053 goto out;
2054 ret = dquot_commit(dquot);
2055 err =
2056 journal_end(&th, dquot->dq_sb,
2057 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2058 if (!ret && err)
2059 ret = err;
2060 out:
2061 reiserfs_write_unlock(dquot->dq_sb);
2062 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063}
2064
2065static int reiserfs_acquire_dquot(struct dquot *dquot)
2066{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002067 struct reiserfs_transaction_handle th;
2068 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002070 reiserfs_write_lock(dquot->dq_sb);
2071 ret =
2072 journal_begin(&th, dquot->dq_sb,
2073 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2074 if (ret)
2075 goto out;
2076 ret = dquot_acquire(dquot);
2077 err =
2078 journal_end(&th, dquot->dq_sb,
2079 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2080 if (!ret && err)
2081 ret = err;
2082 out:
2083 reiserfs_write_unlock(dquot->dq_sb);
2084 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085}
2086
2087static int reiserfs_release_dquot(struct dquot *dquot)
2088{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002089 struct reiserfs_transaction_handle th;
2090 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002092 reiserfs_write_lock(dquot->dq_sb);
2093 ret =
2094 journal_begin(&th, dquot->dq_sb,
2095 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara9c3013e2007-09-11 15:23:29 -07002096 if (ret) {
2097 /* Release dquot anyway to avoid endless cycle in dqput() */
2098 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002099 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07002100 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002101 ret = dquot_release(dquot);
2102 err =
2103 journal_end(&th, dquot->dq_sb,
2104 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2105 if (!ret && err)
2106 ret = err;
2107 out:
2108 reiserfs_write_unlock(dquot->dq_sb);
2109 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110}
2111
2112static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2113{
Jan Kara45065672008-07-25 01:46:37 -07002114 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002115 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2116 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2117 dquot_mark_dquot_dirty(dquot);
2118 return reiserfs_write_dquot(dquot);
2119 } else
2120 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121}
2122
2123static int reiserfs_write_info(struct super_block *sb, int type)
2124{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002125 struct reiserfs_transaction_handle th;
2126 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002128 /* Data block + inode block */
2129 reiserfs_write_lock(sb);
2130 ret = journal_begin(&th, sb, 2);
2131 if (ret)
2132 goto out;
2133 ret = dquot_commit_info(sb, type);
2134 err = journal_end(&th, sb, 2);
2135 if (!ret && err)
2136 ret = err;
2137 out:
2138 reiserfs_write_unlock(sb);
2139 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140}
2141
2142/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002143 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144 */
2145static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2146{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002147 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2148 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149}
2150
2151/*
2152 * Standard function to be called on quota_on
2153 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002154static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Jan Karaf00c9e42010-09-15 17:38:58 +02002155 struct path *path)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002157 int err;
Jan Karad5dee5c2008-04-28 02:16:23 -07002158 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002159 struct reiserfs_transaction_handle th;
Jan Karac3aa0772011-12-21 20:17:10 +01002160 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161
Jan Karac3aa0772011-12-21 20:17:10 +01002162 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt)))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002163 return -EINVAL;
Christoph Hellwig307ae182010-05-19 07:16:43 -04002164
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002165 /* Quotafile not on the same filesystem? */
Al Virod8c95842011-12-07 18:16:57 -05002166 if (path->dentry->d_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002167 err = -EXDEV;
2168 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002169 }
Jan Karaf00c9e42010-09-15 17:38:58 +02002170 inode = path->dentry->d_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002171 /* We must not pack tails for quota files on reiserfs for quota IO to work */
Jan Karad5dee5c2008-04-28 02:16:23 -07002172 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2173 err = reiserfs_unpack(inode, NULL);
2174 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002175 reiserfs_warning(sb, "super-6520",
2176 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002177 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002178 err = -EINVAL;
2179 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002180 }
2181 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002182 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002183 /* Journaling quota? */
2184 if (REISERFS_SB(sb)->s_qf_names[type]) {
2185 /* Quotafile not of fs root? */
Jan Karaf00c9e42010-09-15 17:38:58 +02002186 if (path->dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002187 reiserfs_warning(sb, "super-6521",
2188 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002189 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002190 }
2191
2192 /*
2193 * When we journal data on quota file, we have to flush journal to see
2194 * all updates to the file when we bypass pagecache...
2195 */
2196 if (reiserfs_file_data_log(inode)) {
2197 /* Just start temporary transaction and finish it */
2198 err = journal_begin(&th, sb, 1);
2199 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002200 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002201 err = journal_end_sync(&th, sb, 1);
2202 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002203 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002204 }
Jan Karaf00c9e42010-09-15 17:38:58 +02002205 err = dquot_quota_on(sb, type, format_id, path);
Al Viro77e69da2008-08-01 04:29:18 -04002206out:
Al Viro77e69da2008-08-01 04:29:18 -04002207 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208}
2209
2210/* Read data from quotafile - avoid pagecache and such because we cannot afford
2211 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002212 * itself serializes the operations (and no one else should touch the files)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213 * we don't have to be afraid of races */
2214static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2215 size_t len, loff_t off)
2216{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002217 struct inode *inode = sb_dqopt(sb)->files[type];
2218 unsigned long blk = off >> sb->s_blocksize_bits;
2219 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2220 size_t toread;
2221 struct buffer_head tmp_bh, *bh;
2222 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002224 if (off > i_size)
2225 return 0;
2226 if (off + len > i_size)
2227 len = i_size - off;
2228 toread = len;
2229 while (toread > 0) {
2230 tocopy =
2231 sb->s_blocksize - offset <
2232 toread ? sb->s_blocksize - offset : toread;
2233 tmp_bh.b_state = 0;
2234 /* Quota files are without tails so we can safely use this function */
2235 reiserfs_write_lock(sb);
2236 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2237 reiserfs_write_unlock(sb);
2238 if (err)
2239 return err;
2240 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2241 memset(data, 0, tocopy);
2242 else {
2243 bh = sb_bread(sb, tmp_bh.b_blocknr);
2244 if (!bh)
2245 return -EIO;
2246 memcpy(data, bh->b_data + offset, tocopy);
2247 brelse(bh);
2248 }
2249 offset = 0;
2250 toread -= tocopy;
2251 data += tocopy;
2252 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002254 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255}
2256
2257/* Write to quotafile (we know the transaction is already started and has
2258 * enough credits) */
2259static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2260 const char *data, size_t len, loff_t off)
2261{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002262 struct inode *inode = sb_dqopt(sb)->files[type];
2263 unsigned long blk = off >> sb->s_blocksize_bits;
2264 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2265 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2266 size_t towrite = len;
2267 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002268
Jan Kara9c3013e2007-09-11 15:23:29 -07002269 if (!current->journal_info) {
2270 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2271 " cancelled because transaction is not started.\n",
2272 (unsigned long long)off, (unsigned long long)len);
2273 return -EIO;
2274 }
Arjan van de Ven5c81a412006-07-03 00:25:20 -07002275 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002276 while (towrite > 0) {
2277 tocopy = sb->s_blocksize - offset < towrite ?
2278 sb->s_blocksize - offset : towrite;
2279 tmp_bh.b_state = 0;
2280 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2281 if (err)
2282 goto out;
2283 if (offset || tocopy != sb->s_blocksize)
2284 bh = sb_bread(sb, tmp_bh.b_blocknr);
2285 else
2286 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2287 if (!bh) {
2288 err = -EIO;
2289 goto out;
2290 }
2291 lock_buffer(bh);
2292 memcpy(bh->b_data + offset, data, tocopy);
2293 flush_dcache_page(bh->b_page);
2294 set_buffer_uptodate(bh);
2295 unlock_buffer(bh);
2296 reiserfs_prepare_for_journal(sb, bh, 1);
2297 journal_mark_dirty(current->journal_info, sb, bh);
2298 if (!journal_quota)
2299 reiserfs_add_ordered_list(inode, bh);
2300 brelse(bh);
2301 offset = 0;
2302 towrite -= tocopy;
2303 data += tocopy;
2304 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002306out:
Jan Kara10dd08d2008-07-04 09:59:34 -07002307 if (len == towrite) {
2308 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002309 return err;
Jan Kara10dd08d2008-07-04 09:59:34 -07002310 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002311 if (inode->i_size < off + len - towrite)
2312 i_size_write(inode, off + len - towrite);
2313 inode->i_version++;
2314 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2315 mark_inode_dirty(inode);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08002316 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002317 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318}
2319
2320#endif
2321
Al Viro152a0832010-07-25 00:46:55 +04002322static struct dentry *get_super_block(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -07002323 int flags, const char *dev_name,
Al Viro152a0832010-07-25 00:46:55 +04002324 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325{
Al Viro152a0832010-07-25 00:46:55 +04002326 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327}
2328
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002329static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330{
2331 int ret;
2332
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002333 if ((ret = init_inodecache())) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334 return ret;
2335 }
2336
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002337 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002339 ret = register_filesystem(&reiserfs_fs_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340
2341 if (ret == 0) {
2342 return 0;
2343 }
2344
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002345 reiserfs_proc_info_global_done();
2346 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347
2348 return ret;
2349}
2350
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002351static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002353 reiserfs_proc_info_global_done();
2354 unregister_filesystem(&reiserfs_fs_type);
2355 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002356}
2357
2358struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002359 .owner = THIS_MODULE,
2360 .name = "reiserfs",
Al Viro152a0832010-07-25 00:46:55 +04002361 .mount = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002362 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002363 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364};
2365
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002366MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2367MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2368MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002370module_init(init_reiserfs_fs);
2371module_exit(exit_reiserfs_fs);