blob: f0ab5c94139c0b3418a015cccd6abfcfae8b07c9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
10 *
11 * NO WARRANTY
12 */
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/vmalloc.h>
17#include <linux/time.h>
18#include <asm/uaccess.h>
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>
Alessio Igor Bogani337eb002009-05-12 15:10:54 +020031#include <linux/smp_lock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33struct file_system_type reiserfs_fs_type;
34
35static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
36static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
37static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
38
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070039int is_reiserfs_3_5(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070041 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
42 strlen(reiserfs_3_5_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070043}
44
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070045int is_reiserfs_3_6(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070047 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
48 strlen(reiserfs_3_6_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070049}
50
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070051int is_reiserfs_jr(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070053 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
54 strlen(reiserfs_jr_magic_string));
Linus Torvalds1da177e2005-04-16 15:20:36 -070055}
56
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070057static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070059 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
60 is_reiserfs_jr(rs));
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
62
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070063static int reiserfs_remount(struct super_block *s, int *flags, char *data);
David Howells726c3342006-06-23 02:02:58 -070064static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070066static int reiserfs_sync_fs(struct super_block *s, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067{
Christoph Hellwig5af79262009-05-05 15:41:25 +020068 struct reiserfs_transaction_handle th;
69
70 reiserfs_write_lock(s);
71 if (!journal_begin(&th, s, 1))
72 if (!journal_end_sync(&th, s, 1))
73 reiserfs_flush_old_commits(s);
74 s->s_dirt = 0; /* Even if it's not true.
75 * We'll loop forever in sync_supers otherwise */
76 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070077 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078}
79
80static void reiserfs_write_super(struct super_block *s)
81{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070082 reiserfs_sync_fs(s, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083}
84
Takashi Satoc4be0c12009-01-09 16:40:58 -080085static int reiserfs_freeze(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070087 struct reiserfs_transaction_handle th;
88 reiserfs_write_lock(s);
89 if (!(s->s_flags & MS_RDONLY)) {
90 int err = journal_begin(&th, s, 1);
91 if (err) {
92 reiserfs_block_writes(&th);
93 } else {
94 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
95 1);
96 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
97 reiserfs_block_writes(&th);
98 journal_end_sync(&th, s, 1);
99 }
100 }
101 s->s_dirt = 0;
102 reiserfs_write_unlock(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800103 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104}
105
Takashi Satoc4be0c12009-01-09 16:40:58 -0800106static int reiserfs_unfreeze(struct super_block *s)
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700107{
108 reiserfs_allow_writes(s);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800109 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700112extern const struct in_core_key MAX_IN_CORE_KEY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114/* this is used to delete "save link" when there are no items of a
115 file it points to. It can either happen if unlink is completed but
116 "save unlink" removal, or if file has both unlink and truncate
117 pending and as unlink completes first (because key of "save link"
118 protecting unlink is bigger that a key lf "save link" which
119 protects truncate), so there left no items to make truncate
120 completion on */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700121static int remove_save_link_only(struct super_block *s,
122 struct reiserfs_key *key, int oid_free)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700124 struct reiserfs_transaction_handle th;
125 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700127 /* we are going to do one balancing */
128 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
129 if (err)
130 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700132 reiserfs_delete_solid_item(&th, NULL, key);
133 if (oid_free)
134 /* removals are protected by direct items */
135 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
136
137 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140#ifdef CONFIG_QUOTA
141static int reiserfs_quota_on_mount(struct super_block *, int);
142#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144/* look for uncompleted unlinks and truncates and complete them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700145static int finish_unfinished(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700147 INITIALIZE_PATH(path);
148 struct cpu_key max_cpu_key, obj_key;
Lepton Wufb46f342007-10-16 23:30:04 -0700149 struct reiserfs_key save_link_key, last_inode_key;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700150 int retval = 0;
151 struct item_head *ih;
152 struct buffer_head *bh;
153 int item_pos;
154 char *item;
155 int done;
156 struct inode *inode;
157 int truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700159 int i;
160 int ms_active_set;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700162
163 /* compose key to look for "save" links */
164 max_cpu_key.version = KEY_FORMAT_3_5;
165 max_cpu_key.on_disk_key.k_dir_id = ~0U;
166 max_cpu_key.on_disk_key.k_objectid = ~0U;
167 set_cpu_key_k_offset(&max_cpu_key, ~0U);
168 max_cpu_key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Lepton Wufb46f342007-10-16 23:30:04 -0700170 memset(&last_inode_key, 0, sizeof(last_inode_key));
171
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700173 /* Needed for iput() to work correctly and not trash data */
174 if (s->s_flags & MS_ACTIVE) {
175 ms_active_set = 0;
176 } else {
177 ms_active_set = 1;
178 s->s_flags |= MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700180 /* Turn on quotas so that they are updated correctly */
181 for (i = 0; i < MAXQUOTAS; i++) {
182 if (REISERFS_SB(s)->s_qf_names[i]) {
183 int ret = reiserfs_quota_on_mount(s, i);
184 if (ret < 0)
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400185 reiserfs_warning(s, "reiserfs-2500",
186 "cannot turn on journaled "
187 "quota: error %d", ret);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700188 }
189 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700192 done = 0;
193 REISERFS_SB(s)->s_is_unlinked_ok = 1;
194 while (!retval) {
195 retval = search_item(s, &max_cpu_key, &path);
196 if (retval != ITEM_NOT_FOUND) {
Jeff Mahoney0030b642009-03-30 14:02:28 -0400197 reiserfs_error(s, "vs-2140",
198 "search_by_key returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700199 break;
200 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700202 bh = get_last_bh(&path);
203 item_pos = get_item_pos(&path);
204 if (item_pos != B_NR_ITEMS(bh)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400205 reiserfs_warning(s, "vs-2060",
206 "wrong position found");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700207 break;
208 }
209 item_pos--;
210 ih = B_N_PITEM_HEAD(bh, item_pos);
211
212 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
213 /* there are no "save" links anymore */
214 break;
215
216 save_link_key = ih->ih_key;
217 if (is_indirect_le_ih(ih))
218 truncate = 1;
219 else
220 truncate = 0;
221
222 /* reiserfs_iget needs k_dirid and k_objectid only */
223 item = B_I_PITEM(bh, ih);
224 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
225 obj_key.on_disk_key.k_objectid =
226 le32_to_cpu(ih->ih_key.k_objectid);
227 obj_key.on_disk_key.k_offset = 0;
228 obj_key.on_disk_key.k_type = 0;
229
230 pathrelse(&path);
231
232 inode = reiserfs_iget(s, &obj_key);
233 if (!inode) {
234 /* the unlink almost completed, it just did not manage to remove
235 "save" link and release objectid */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400236 reiserfs_warning(s, "vs-2180", "iget failed for %K",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700237 &obj_key);
238 retval = remove_save_link_only(s, &save_link_key, 1);
239 continue;
240 }
241
242 if (!truncate && inode->i_nlink) {
243 /* file is not unlinked */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400244 reiserfs_warning(s, "vs-2185",
245 "file %K is not unlinked",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700246 &obj_key);
247 retval = remove_save_link_only(s, &save_link_key, 0);
248 continue;
249 }
Christoph Hellwig871a2932010-03-03 09:05:07 -0500250 dquot_initialize(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700251
252 if (truncate && S_ISDIR(inode->i_mode)) {
253 /* We got a truncate request for a dir which is impossible.
254 The only imaginable way is to execute unfinished truncate request
255 then boot into old kernel, remove the file and create dir with
256 the same key. */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400257 reiserfs_warning(s, "green-2101",
258 "impossible truncate on a "
259 "directory %k. Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700260 INODE_PKEY(inode));
261 retval = remove_save_link_only(s, &save_link_key, 0);
262 truncate = 0;
263 iput(inode);
264 continue;
265 }
266
267 if (truncate) {
268 REISERFS_I(inode)->i_flags |=
269 i_link_saved_truncate_mask;
270 /* not completed truncate found. New size was committed together
271 with "save" link */
272 reiserfs_info(s, "Truncating %k to %Ld ..",
273 INODE_PKEY(inode), inode->i_size);
274 reiserfs_truncate_file(inode,
275 0
276 /*don't update modification time */
277 );
278 retval = remove_save_link(inode, truncate);
279 } else {
280 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
281 /* not completed unlink (rmdir) found */
282 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
Lepton Wufb46f342007-10-16 23:30:04 -0700283 if (memcmp(&last_inode_key, INODE_PKEY(inode),
284 sizeof(last_inode_key))){
285 last_inode_key = *INODE_PKEY(inode);
286 /* removal gets completed in iput */
287 retval = 0;
288 } else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400289 reiserfs_warning(s, "super-2189", "Dead loop "
290 "in finish_unfinished "
291 "detected, just remove "
292 "save link\n");
Lepton Wufb46f342007-10-16 23:30:04 -0700293 retval = remove_save_link_only(s,
294 &save_link_key, 0);
295 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700296 }
297
298 iput(inode);
299 printk("done\n");
300 done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700302 REISERFS_SB(s)->s_is_unlinked_ok = 0;
303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700305 /* Turn quotas off */
306 for (i = 0; i < MAXQUOTAS; i++) {
307 if (sb_dqopt(s)->files[i])
Christoph Hellwig287a8092010-05-19 07:16:45 -0400308 dquot_quota_off(s, i);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700309 }
310 if (ms_active_set)
311 /* Restore the flag back */
312 s->s_flags &= ~MS_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700314 pathrelse(&path);
315 if (done)
316 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
317 "Completed\n", done);
318 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321/* to protect file being unlinked from getting lost we "safe" link files
322 being unlinked. This link will be deleted in the same transaction with last
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200323 item of file. mounting the filesystem we scan all these links and remove
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 files which almost got lost */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700325void add_save_link(struct reiserfs_transaction_handle *th,
326 struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700328 INITIALIZE_PATH(path);
329 int retval;
330 struct cpu_key key;
331 struct item_head ih;
332 __le32 link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700334 BUG_ON(!th->t_trans_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700336 /* file can only get one "save link" of each kind */
337 RFALSE(truncate &&
338 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
339 "saved link already exists for truncated inode %lx",
340 (long)inode->i_ino);
341 RFALSE(!truncate &&
342 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
343 "saved link already exists for unlinked inode %lx",
344 (long)inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700346 /* setup key of "save" link */
347 key.version = KEY_FORMAT_3_5;
348 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
349 key.on_disk_key.k_objectid = inode->i_ino;
350 if (!truncate) {
351 /* unlink, rmdir, rename */
352 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
353 set_cpu_key_k_type(&key, TYPE_DIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700355 /* item head of "safe" link */
356 make_le_item_head(&ih, &key, key.version,
357 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
358 4 /*length */ , 0xffff /*free space */ );
359 } else {
360 /* truncate */
361 if (S_ISDIR(inode->i_mode))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400362 reiserfs_warning(inode->i_sb, "green-2102",
363 "Adding a truncate savelink for "
364 "a directory %k! Please report",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700365 INODE_PKEY(inode));
366 set_cpu_key_k_offset(&key, 1);
367 set_cpu_key_k_type(&key, TYPE_INDIRECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700369 /* item head of "safe" link */
370 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
371 4 /*length */ , 0 /*free space */ );
372 }
373 key.key_length = 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700375 /* look for its place in the tree */
376 retval = search_item(inode->i_sb, &key, &path);
377 if (retval != ITEM_NOT_FOUND) {
378 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400379 reiserfs_error(inode->i_sb, "vs-2100",
380 "search_by_key (%K) returned %d", &key,
381 retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700382 pathrelse(&path);
383 return;
384 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700386 /* body of "save" link */
387 link = INODE_PKEY(inode)->k_dir_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700389 /* put "save" link inot tree, don't charge quota to anyone */
390 retval =
391 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
392 if (retval) {
393 if (retval != -ENOSPC)
Jeff Mahoney0030b642009-03-30 14:02:28 -0400394 reiserfs_error(inode->i_sb, "vs-2120",
395 "insert_item returned %d", retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700396 } else {
397 if (truncate)
398 REISERFS_I(inode)->i_flags |=
399 i_link_saved_truncate_mask;
400 else
401 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
402 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
404
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405/* this opens transaction unlike add_save_link */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700406int remove_save_link(struct inode *inode, int truncate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700408 struct reiserfs_transaction_handle th;
409 struct reiserfs_key key;
410 int err;
411
412 /* we are going to do one balancing only */
413 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
414 if (err)
415 return err;
416
417 /* setup key of "save" link */
418 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
419 key.k_objectid = INODE_PKEY(inode)->k_objectid;
420 if (!truncate) {
421 /* unlink, rmdir, rename */
422 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
423 1 + inode->i_sb->s_blocksize);
424 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
425 } else {
426 /* truncate */
427 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
428 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
429 }
430
431 if ((truncate &&
432 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
433 (!truncate &&
434 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
435 /* don't take quota bytes from anywhere */
436 reiserfs_delete_solid_item(&th, NULL, &key);
437 if (!truncate) {
438 reiserfs_release_objectid(&th, inode->i_ino);
439 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
440 } else
441 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
442
443 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444}
445
David Howellsedc666e2006-10-11 01:22:14 -0700446static void reiserfs_kill_sb(struct super_block *s)
447{
448 if (REISERFS_SB(s)) {
449 if (REISERFS_SB(s)->xattr_root) {
450 d_invalidate(REISERFS_SB(s)->xattr_root);
451 dput(REISERFS_SB(s)->xattr_root);
452 REISERFS_SB(s)->xattr_root = NULL;
453 }
David Howellsedc666e2006-10-11 01:22:14 -0700454 if (REISERFS_SB(s)->priv_root) {
455 d_invalidate(REISERFS_SB(s)->priv_root);
456 dput(REISERFS_SB(s)->priv_root);
457 REISERFS_SB(s)->priv_root = NULL;
458 }
459 }
460
461 kill_block_super(s);
462}
463
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700464static void reiserfs_put_super(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700466 struct reiserfs_transaction_handle th;
467 th.t_trans_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400469 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
470
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200471 reiserfs_write_lock(s);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200472
Christoph Hellwig8c85e122009-04-28 18:00:26 +0200473 if (s->s_dirt)
474 reiserfs_write_super(s);
475
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700476 /* change file system state to current state if it was mounted with read-write permissions */
477 if (!(s->s_flags & MS_RDONLY)) {
478 if (!journal_begin(&th, s, 10)) {
479 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
480 1);
481 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
482 REISERFS_SB(s)->s_mount_state);
483 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
484 }
485 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700487 /* note, journal_release checks for readonly mount, and can decide not
488 ** to do a journal_end
489 */
490 journal_release(&th, s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Jeff Mahoney50652272006-09-30 23:28:44 -0700492 reiserfs_free_bitmap_cache(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700494 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700496 print_statistics(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700498 if (REISERFS_SB(s)->reserved_blocks != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400499 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700500 REISERFS_SB(s)->reserved_blocks);
501 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700503 reiserfs_proc_info_done(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +0200505 reiserfs_write_unlock(s);
506 mutex_destroy(&REISERFS_SB(s)->lock);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700507 kfree(s->s_fs_info);
508 s->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509}
510
Christoph Lametere18b8902006-12-06 20:33:20 -0800511static struct kmem_cache *reiserfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513static struct inode *reiserfs_alloc_inode(struct super_block *sb)
514{
515 struct reiserfs_inode_info *ei;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700516 ei = (struct reiserfs_inode_info *)
Christoph Lametere94b1762006-12-06 20:33:17 -0800517 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 if (!ei)
519 return NULL;
520 return &ei->vfs_inode;
521}
522
523static void reiserfs_destroy_inode(struct inode *inode)
524{
525 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
526}
527
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700528static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700530 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
Christoph Lametera35afb82007-05-16 22:10:57 -0700532 INIT_LIST_HEAD(&ei->i_prealloc_list);
533 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536static int init_inodecache(void)
537{
538 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700539 sizeof(struct
540 reiserfs_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800541 0, (SLAB_RECLAIM_ACCOUNT|
542 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900543 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 if (reiserfs_inode_cachep == NULL)
545 return -ENOMEM;
546 return 0;
547}
548
549static void destroy_inodecache(void)
550{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700551 kmem_cache_destroy(reiserfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552}
553
554/* we don't mark inodes dirty, we just log them */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700555static void reiserfs_dirty_inode(struct inode *inode)
556{
557 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700559 int err = 0;
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200560 int lock_depth;
561
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700562 if (inode->i_sb->s_flags & MS_RDONLY) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400563 reiserfs_warning(inode->i_sb, "clm-6006",
564 "writing inode %lu on readonly FS",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700565 inode->i_ino);
566 return;
567 }
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200568 lock_depth = reiserfs_write_lock_once(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700570 /* this is really only used for atime updates, so they don't have
571 ** to be included in O_SYNC or fsync
572 */
573 err = journal_begin(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200574 if (err)
575 goto out;
576
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700577 reiserfs_update_sd(&th, inode);
578 journal_end(&th, inode->i_sb, 1);
Frederic Weisbeckerdc8f6d82009-04-14 05:34:25 +0200579
580out:
581 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582}
583
Christoph Hellwig257ba152010-03-03 09:05:04 -0500584static void reiserfs_clear_inode(struct inode *inode)
585{
Christoph Hellwig9f754752010-03-03 09:05:05 -0500586 dquot_drop(inode);
Christoph Hellwig257ba152010-03-03 09:05:04 -0500587}
588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700590static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
591 size_t, loff_t);
592static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
593 loff_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594#endif
595
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800596static const struct super_operations reiserfs_sops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700597 .alloc_inode = reiserfs_alloc_inode,
598 .destroy_inode = reiserfs_destroy_inode,
599 .write_inode = reiserfs_write_inode,
600 .dirty_inode = reiserfs_dirty_inode,
Christoph Hellwig257ba152010-03-03 09:05:04 -0500601 .clear_inode = reiserfs_clear_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700602 .delete_inode = reiserfs_delete_inode,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700603 .put_super = reiserfs_put_super,
604 .write_super = reiserfs_write_super,
605 .sync_fs = reiserfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800606 .freeze_fs = reiserfs_freeze,
607 .unfreeze_fs = reiserfs_unfreeze,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700608 .statfs = reiserfs_statfs,
609 .remount_fs = reiserfs_remount,
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -0800610 .show_options = generic_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700612 .quota_read = reiserfs_quota_read,
613 .quota_write = reiserfs_quota_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614#endif
615};
616
617#ifdef CONFIG_QUOTA
618#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
619
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620static int reiserfs_write_dquot(struct dquot *);
621static int reiserfs_acquire_dquot(struct dquot *);
622static int reiserfs_release_dquot(struct dquot *);
623static int reiserfs_mark_dquot_dirty(struct dquot *);
624static int reiserfs_write_info(struct super_block *, int);
Christoph Hellwig307ae182010-05-19 07:16:43 -0400625static int reiserfs_quota_on(struct super_block *, int, int, char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700627static const struct dquot_operations reiserfs_quota_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700628 .write_dquot = reiserfs_write_dquot,
629 .acquire_dquot = reiserfs_acquire_dquot,
630 .release_dquot = reiserfs_release_dquot,
631 .mark_dirty = reiserfs_mark_dquot_dirty,
632 .write_info = reiserfs_write_info,
Jan Kara41030032008-11-25 15:31:33 +0100633 .alloc_dquot = dquot_alloc,
634 .destroy_dquot = dquot_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635};
636
Alexey Dobriyan0d54b212009-09-21 17:01:09 -0700637static const struct quotactl_ops reiserfs_qctl_operations = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700638 .quota_on = reiserfs_quota_on,
Christoph Hellwig287a8092010-05-19 07:16:45 -0400639 .quota_off = dquot_quota_off,
640 .quota_sync = dquot_quota_sync,
641 .get_info = dquot_get_dqinfo,
642 .set_info = dquot_set_dqinfo,
643 .get_dqblk = dquot_get_dqblk,
644 .set_dqblk = dquot_set_dqblk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645};
646#endif
647
Christoph Hellwig39655162007-10-21 16:42:17 -0700648static const struct export_operations reiserfs_export_ops = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700649 .encode_fh = reiserfs_encode_fh,
Christoph Hellwigbe55caf2007-10-21 16:42:13 -0700650 .fh_to_dentry = reiserfs_fh_to_dentry,
651 .fh_to_parent = reiserfs_fh_to_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700652 .get_parent = reiserfs_get_parent,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700653};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
655/* this struct is used in reiserfs_getopt () for containing the value for those
656 mount options that have values rather than being toggles. */
657typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700658 char *value;
659 int setmask; /* bitmask which is to set on mount_options bitmask when this
660 value is found, 0 is no bits are to be changed. */
661 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
662 value is found, 0 is no bits are to be changed. This is
663 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664} arg_desc_t;
665
666/* Set this bit in arg_required to allow empty arguments */
667#define REISERFS_OPT_ALLOWEMPTY 31
668
669/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
670 mount options */
671typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700672 char *option_name;
673 int arg_required; /* 0 if argument is not required, not 0 otherwise */
674 const arg_desc_t *values; /* list of values accepted by an option */
675 int setmask; /* bitmask which is to set on mount_options bitmask when this
676 value is found, 0 is no bits are to be changed. */
677 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
678 value is found, 0 is no bits are to be changed. This is
679 applied BEFORE setmask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680} opt_desc_t;
681
682/* possible values for -o data= */
683static const arg_desc_t logging_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700684 {"ordered", 1 << REISERFS_DATA_ORDERED,
685 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
686 {"journal", 1 << REISERFS_DATA_LOG,
687 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
688 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
689 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800690 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691};
692
693/* possible values for -o barrier= */
694static const arg_desc_t barrier_mode[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700695 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
696 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800697 {.value = NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698};
699
700/* possible values for "-o block-allocator=" and bits which are to be set in
701 s_mount_opt of reiserfs specific part of in-core super block */
702static const arg_desc_t balloc[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700703 {"noborder", 1 << REISERFS_NO_BORDER, 0},
704 {"border", 0, 1 << REISERFS_NO_BORDER},
705 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
706 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
707 {"test4", 1 << REISERFS_TEST4, 0},
708 {"notest4", 0, 1 << REISERFS_TEST4},
709 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710};
711
712static const arg_desc_t tails[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700713 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
714 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
715 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
716 {NULL, 0, 0}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717};
718
719static const arg_desc_t error_actions[] = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700720 {"panic", 1 << REISERFS_ERROR_PANIC,
721 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
722 {"ro-remount", 1 << REISERFS_ERROR_RO,
723 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700725 {"continue", 1 << REISERFS_ERROR_CONTINUE,
726 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727#endif
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700728 {NULL, 0, 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729};
730
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731/* proceed only one option from a list *cur - string containing of mount options
732 opts - array of options which are accepted
733 opt_arg - if option is found and requires an argument and if it is specifed
734 in the input - pointer to the argument is stored here
735 bit_flags - if option requires to set a certain bit - it is set here
736 return -1 if unknown option is found, opt->arg_required otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700737static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
738 char **opt_arg, unsigned long *bit_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700740 char *p;
Jeff Mahoney0222e652009-03-30 14:02:44 -0400741 /* foo=bar,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700742 ^ ^ ^
743 | | +-- option_end
744 | +-- arg_start
745 +-- option_start
746 */
747 const opt_desc_t *opt;
748 const arg_desc_t *arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700750 p = *cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700752 /* assume argument cannot contain commas */
753 *cur = strchr(p, ',');
754 if (*cur) {
755 *(*cur) = '\0';
756 (*cur)++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700759 if (!strncmp(p, "alloc=", 6)) {
760 /* Ugly special case, probably we should redo options parser so that
761 it can understand several arguments for some options, also so that
762 it can fill several bitfields with option values. */
763 if (reiserfs_parse_alloc_options(s, p + 6)) {
764 return -1;
765 } else {
766 return 0;
767 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700769
770 /* for every option in the list */
771 for (opt = opts; opt->option_name; opt++) {
772 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
773 if (bit_flags) {
774 if (opt->clrmask ==
775 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400776 reiserfs_warning(s, "super-6500",
777 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700778 p);
779 else
780 *bit_flags &= ~opt->clrmask;
781 if (opt->setmask ==
782 (1 << REISERFS_UNSUPPORTED_OPT))
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400783 reiserfs_warning(s, "super-6501",
784 "%s not supported.\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700785 p);
786 else
787 *bit_flags |= opt->setmask;
788 }
789 break;
790 }
791 }
792 if (!opt->option_name) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400793 reiserfs_warning(s, "super-6502",
794 "unknown mount option \"%s\"", p);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700795 return -1;
796 }
797
798 p += strlen(opt->option_name);
799 switch (*p) {
800 case '=':
801 if (!opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400802 reiserfs_warning(s, "super-6503",
803 "the option \"%s\" does not "
804 "require an argument\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700805 opt->option_name);
806 return -1;
807 }
808 break;
809
810 case 0:
811 if (opt->arg_required) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400812 reiserfs_warning(s, "super-6504",
813 "the option \"%s\" requires an "
814 "argument\n", opt->option_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700815 return -1;
816 }
817 break;
818 default:
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400819 reiserfs_warning(s, "super-6505",
820 "head of option \"%s\" is only correct\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700821 opt->option_name);
822 return -1;
823 }
824
825 /* move to the argument, or to next option if argument is not required */
826 p++;
827
828 if (opt->arg_required
829 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
830 && !strlen(p)) {
831 /* this catches "option=," if not allowed */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400832 reiserfs_warning(s, "super-6506",
833 "empty argument for \"%s\"\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700834 opt->option_name);
835 return -1;
836 }
837
838 if (!opt->values) {
839 /* *=NULLopt_arg contains pointer to argument */
840 *opt_arg = p;
841 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
842 }
843
844 /* values possible for this option are listed in opt->values */
845 for (arg = opt->values; arg->value; arg++) {
846 if (!strcmp(p, arg->value)) {
847 if (bit_flags) {
848 *bit_flags &= ~arg->clrmask;
849 *bit_flags |= arg->setmask;
850 }
851 return opt->arg_required;
852 }
853 }
854
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400855 reiserfs_warning(s, "super-6506",
856 "bad value \"%s\" for option \"%s\"\n", p,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700857 opt->option_name);
858 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859}
860
861/* returns 0 if something is wrong in option string, 1 - otherwise */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700862static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
863 unsigned long *mount_options,
864 /* after the parsing phase, contains the
865 collection of bitflags defining what
866 mount options were selected. */
867 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
868 char **jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -0700869 unsigned int *commit_max_age,
870 char **qf_names,
871 unsigned int *qfmt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700873 int c;
874 char *arg = NULL;
875 char *pos;
876 opt_desc_t opts[] = {
877 /* Compatibility stuff, so that -o notail for old setups still work */
878 {"tails",.arg_required = 't',.values = tails},
879 {"notail",.clrmask =
880 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
881 {"conv",.setmask = 1 << REISERFS_CONVERT},
882 {"attrs",.setmask = 1 << REISERFS_ATTRS},
883 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
Jeff Mahoney73422812009-05-10 16:05:39 -0400884 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885#ifdef CONFIG_REISERFS_FS_XATTR
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700886 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
887 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700889 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
890 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891#endif
892#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700893 {"acl",.setmask = 1 << REISERFS_POSIXACL},
894 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895#else
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700896 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
897 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898#endif
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800899 {.option_name = "nolog"},
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700900 {"replayonly",.setmask = 1 << REPLAYONLY},
901 {"block-allocator",.arg_required = 'a',.values = balloc},
902 {"data",.arg_required = 'd',.values = logging_mode},
903 {"barrier",.arg_required = 'b',.values = barrier_mode},
904 {"resize",.arg_required = 'r',.values = NULL},
905 {"jdev",.arg_required = 'j',.values = NULL},
906 {"nolargeio",.arg_required = 'w',.values = NULL},
907 {"commit",.arg_required = 'c',.values = NULL},
908 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
909 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
910 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
911 {"errors",.arg_required = 'e',.values = error_actions},
912 {"usrjquota",.arg_required =
913 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
914 {"grpjquota",.arg_required =
915 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
916 {"jqfmt",.arg_required = 'f',.values = NULL},
Vladimir V. Savelievcd02b962006-03-25 03:07:15 -0800917 {.option_name = NULL}
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700918 };
919
920 *blocks = 0;
921 if (!options || !*options)
922 /* use default configuration: create tails, journaling on, no
923 conversion to newest format */
924 return 1;
925
926 for (pos = options; pos;) {
927 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
928 if (c == -1)
929 /* wrong option is given */
930 return 0;
931
932 if (c == 'r') {
933 char *p;
934
935 p = NULL;
936 /* "resize=NNN" or "resize=auto" */
937
938 if (!strcmp(arg, "auto")) {
939 /* From JFS code, to auto-get the size. */
940 *blocks =
941 s->s_bdev->bd_inode->i_size >> s->
942 s_blocksize_bits;
943 } else {
944 *blocks = simple_strtoul(arg, &p, 0);
945 if (*p != '\0') {
946 /* NNN does not look like a number */
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400947 reiserfs_warning(s, "super-6507",
948 "bad value %s for "
949 "-oresize\n", arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700950 return 0;
951 }
952 }
953 }
954
955 if (c == 'c') {
956 char *p = NULL;
957 unsigned long val = simple_strtoul(arg, &p, 0);
958 /* commit=NNN (time in seconds) */
959 if (*p != '\0' || val >= (unsigned int)-1) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400960 reiserfs_warning(s, "super-6508",
961 "bad value %s for -ocommit\n",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700962 arg);
963 return 0;
964 }
965 *commit_max_age = (unsigned int)val;
966 }
967
968 if (c == 'w') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400969 reiserfs_warning(s, "super-6509", "nolargeio option "
970 "is no longer supported");
Adrian Bunk36b756f2006-09-27 01:50:50 -0700971 return 0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700972 }
973
974 if (c == 'j') {
975 if (arg && *arg && jdev_name) {
976 if (*jdev_name) { //Hm, already assigned?
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400977 reiserfs_warning(s, "super-6510",
978 "journal device was "
979 "already specified to "
980 "be %s", *jdev_name);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700981 return 0;
982 }
983 *jdev_name = arg;
984 }
985 }
986#ifdef CONFIG_QUOTA
987 if (c == 'u' || c == 'g') {
988 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
989
Jan Kara6929f892008-08-20 18:16:36 +0200990 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -0700991 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -0400992 reiserfs_warning(s, "super-6511",
993 "cannot change journaled "
994 "quota options when quota "
995 "turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700996 return 0;
997 }
998 if (*arg) { /* Some filename specified? */
999 if (REISERFS_SB(s)->s_qf_names[qtype]
1000 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1001 arg)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001002 reiserfs_warning(s, "super-6512",
1003 "%s quota file "
1004 "already specified.",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001005 QTYPE2NAME(qtype));
1006 return 0;
1007 }
1008 if (strchr(arg, '/')) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001009 reiserfs_warning(s, "super-6513",
1010 "quotafile must be "
1011 "on filesystem root.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001012 return 0;
1013 }
Jan Kara00b44192008-07-25 01:46:38 -07001014 qf_names[qtype] =
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001015 kmalloc(strlen(arg) + 1, GFP_KERNEL);
Jan Kara00b44192008-07-25 01:46:38 -07001016 if (!qf_names[qtype]) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001017 reiserfs_warning(s, "reiserfs-2502",
1018 "not enough memory "
1019 "for storing "
1020 "quotafile name.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001021 return 0;
1022 }
Jan Kara00b44192008-07-25 01:46:38 -07001023 strcpy(qf_names[qtype], arg);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001024 *mount_options |= 1 << REISERFS_QUOTA;
1025 } else {
Jan Kara00b44192008-07-25 01:46:38 -07001026 if (qf_names[qtype] !=
1027 REISERFS_SB(s)->s_qf_names[qtype])
1028 kfree(qf_names[qtype]);
1029 qf_names[qtype] = NULL;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001030 }
1031 }
1032 if (c == 'f') {
1033 if (!strcmp(arg, "vfsold"))
Jan Kara00b44192008-07-25 01:46:38 -07001034 *qfmt = QFMT_VFS_OLD;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001035 else if (!strcmp(arg, "vfsv0"))
Jan Kara00b44192008-07-25 01:46:38 -07001036 *qfmt = QFMT_VFS_V0;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001037 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001038 reiserfs_warning(s, "super-6514",
1039 "unknown quota format "
1040 "specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001041 return 0;
1042 }
Jan Kara6929f892008-08-20 18:16:36 +02001043 if (sb_any_quota_loaded(s) &&
Jan Kara00b44192008-07-25 01:46:38 -07001044 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001045 reiserfs_warning(s, "super-6515",
1046 "cannot change journaled "
1047 "quota options when quota "
1048 "turned on.");
Jan Kara00b44192008-07-25 01:46:38 -07001049 return 0;
1050 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001051 }
1052#else
1053 if (c == 'u' || c == 'g' || c == 'f') {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001054 reiserfs_warning(s, "reiserfs-2503", "journaled "
1055 "quota options not supported.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001056 return 0;
1057 }
1058#endif
1059 }
1060
1061#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001062 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1063 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001064 reiserfs_warning(s, "super-6515",
1065 "journaled quota format not specified.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001066 return 0;
1067 }
1068 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1069 if (!(*mount_options & (1 << REISERFS_QUOTA))
Jan Kara6929f892008-08-20 18:16:36 +02001070 && sb_any_quota_loaded(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001071 reiserfs_warning(s, "super-6516", "quota options must "
1072 "be present when quota is turned on.");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001073 return 0;
1074 }
1075#endif
1076
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078}
1079
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001080static void switch_data_mode(struct super_block *s, unsigned long mode)
1081{
1082 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1083 (1 << REISERFS_DATA_ORDERED) |
1084 (1 << REISERFS_DATA_WRITEBACK));
1085 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086}
1087
1088static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1089{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001090 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1091 if (!reiserfs_data_log(s)) {
1092 switch_data_mode(s, REISERFS_DATA_LOG);
1093 reiserfs_info(s, "switching to journaled data mode\n");
1094 }
1095 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1096 if (!reiserfs_data_ordered(s)) {
1097 switch_data_mode(s, REISERFS_DATA_ORDERED);
1098 reiserfs_info(s, "switching to ordered data mode\n");
1099 }
1100 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1101 if (!reiserfs_data_writeback(s)) {
1102 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1103 reiserfs_info(s, "switching to writeback data mode\n");
1104 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106}
1107
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001108static void handle_barrier_mode(struct super_block *s, unsigned long bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001110 int flush = (1 << REISERFS_BARRIER_FLUSH);
1111 int none = (1 << REISERFS_BARRIER_NONE);
1112 int all_barrier = flush | none;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001114 if (bits & all_barrier) {
1115 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1116 if (bits & flush) {
1117 REISERFS_SB(s)->s_mount_opt |= flush;
1118 printk("reiserfs: enabling write barrier flush mode\n");
1119 } else if (bits & none) {
1120 REISERFS_SB(s)->s_mount_opt |= none;
1121 printk("reiserfs: write barriers turned off\n");
1122 }
1123 }
1124}
1125
1126static void handle_attrs(struct super_block *s)
1127{
1128 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1129
1130 if (reiserfs_attrs(s)) {
1131 if (old_format_only(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001132 reiserfs_warning(s, "super-6517", "cannot support "
1133 "attributes on 3.5.x disk format");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001134 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 return;
1136 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001137 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001138 reiserfs_warning(s, "super-6518", "cannot support "
1139 "attributes until flag is set in "
1140 "super-block");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001141 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 }
1143 }
1144}
1145
Jan Kara00b44192008-07-25 01:46:38 -07001146#ifdef CONFIG_QUOTA
1147static void handle_quota_files(struct super_block *s, char **qf_names,
1148 unsigned int *qfmt)
1149{
1150 int i;
1151
1152 for (i = 0; i < MAXQUOTAS; i++) {
1153 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1154 kfree(REISERFS_SB(s)->s_qf_names[i]);
1155 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1156 }
1157 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1158}
1159#endif
1160
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001161static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001163 struct reiserfs_super_block *rs;
1164 struct reiserfs_transaction_handle th;
1165 unsigned long blocks;
1166 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1167 unsigned long safe_mask = 0;
1168 unsigned int commit_max_age = (unsigned int)-1;
1169 struct reiserfs_journal *journal = SB_JOURNAL(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001170 char *new_opts = kstrdup(arg, GFP_KERNEL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001171 int err;
Jan Kara00b44192008-07-25 01:46:38 -07001172 char *qf_names[MAXQUOTAS];
1173 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001175 int i;
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001176#endif
Jan Kara00b44192008-07-25 01:46:38 -07001177
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001178 reiserfs_write_lock(s);
1179
1180#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001181 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182#endif
1183
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001184 rs = SB_DISK_SUPER_BLOCK(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001186 if (!reiserfs_parse_options
Jan Kara00b44192008-07-25 01:46:38 -07001187 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1188 qf_names, &qfmt)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189#ifdef CONFIG_QUOTA
Jan Kara00b44192008-07-25 01:46:38 -07001190 for (i = 0; i < MAXQUOTAS; i++)
1191 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1192 kfree(qf_names[i]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001193#endif
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001194 err = -EINVAL;
1195 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 }
Jan Kara00b44192008-07-25 01:46:38 -07001197#ifdef CONFIG_QUOTA
1198 handle_quota_files(s, qf_names, &qfmt);
1199#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001201 handle_attrs(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001203 /* Add options that are safe here */
1204 safe_mask |= 1 << REISERFS_SMALLTAIL;
1205 safe_mask |= 1 << REISERFS_LARGETAIL;
1206 safe_mask |= 1 << REISERFS_NO_BORDER;
1207 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1208 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1209 safe_mask |= 1 << REISERFS_TEST4;
1210 safe_mask |= 1 << REISERFS_ATTRS;
1211 safe_mask |= 1 << REISERFS_XATTRS_USER;
1212 safe_mask |= 1 << REISERFS_POSIXACL;
1213 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1214 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1215 safe_mask |= 1 << REISERFS_ERROR_RO;
1216 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1217 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1218 safe_mask |= 1 << REISERFS_QUOTA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001220 /* Update the bitmask, taking care to keep
1221 * the bits we're not allowed to change here */
1222 REISERFS_SB(s)->s_mount_opt =
1223 (REISERFS_SB(s)->
1224 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001226 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1227 journal->j_max_commit_age = commit_max_age;
1228 journal->j_max_trans_age = commit_max_age;
1229 } else if (commit_max_age == 0) {
1230 /* 0 means restore defaults. */
1231 journal->j_max_commit_age = journal->j_default_max_commit_age;
1232 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1233 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001235 if (blocks) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001236 err = reiserfs_resize(s, blocks);
1237 if (err != 0)
1238 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001239 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001241 if (*mount_flags & MS_RDONLY) {
1242 reiserfs_xattr_init(s, *mount_flags);
1243 /* remount read-only */
1244 if (s->s_flags & MS_RDONLY)
1245 /* it is read-only already */
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001246 goto out_ok;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001247
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001248 err = dquot_suspend(s, -1);
1249 if (err < 0)
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001250 goto out_err;
Christoph Hellwigc79d9672010-05-19 07:16:40 -04001251
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001252 /* try to remount file system with read-only permissions */
1253 if (sb_umount_state(rs) == REISERFS_VALID_FS
1254 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001255 goto out_ok;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001256 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001258 err = journal_begin(&th, s, 10);
1259 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001260 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001262 /* Mounting a rw partition read-only. */
1263 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1264 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1265 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1266 } else {
1267 /* remount read-write */
1268 if (!(s->s_flags & MS_RDONLY)) {
1269 reiserfs_xattr_init(s, *mount_flags);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001270 goto out_ok; /* We are read-write already */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001271 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001273 if (reiserfs_is_journal_aborted(journal)) {
1274 err = journal->j_errno;
1275 goto out_err;
1276 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001278 handle_data_mode(s, mount_options);
1279 handle_barrier_mode(s, mount_options);
1280 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1281 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1282 err = journal_begin(&th, s, 10);
1283 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001284 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001286 /* Mount a partition which is read-only, read-write */
1287 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1288 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1289 s->s_flags &= ~MS_RDONLY;
1290 set_sb_umount_state(rs, REISERFS_ERROR_FS);
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001291 if (!old_format_only(s))
1292 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001293 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1294 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1295 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1296 }
1297 /* this will force a full flush of all journal lists */
1298 SB_JOURNAL(s)->j_must_wait = 1;
1299 err = journal_end(&th, s, 10);
1300 if (err)
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001301 goto out_err;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001302 s->s_dirt = 0;
1303
1304 if (!(*mount_flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -04001305 dquot_resume(s, -1);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001306 finish_unfinished(s);
1307 reiserfs_xattr_init(s, *mount_flags);
1308 }
1309
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001310out_ok:
Al Viro2a32ceb2009-05-08 16:05:57 -04001311 replace_mount_options(s, new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001312 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001313 return 0;
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001314
1315out_err:
1316 kfree(new_opts);
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001317 reiserfs_write_unlock(s);
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001318 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319}
1320
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001321static int read_super_block(struct super_block *s, int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001323 struct buffer_head *bh;
1324 struct reiserfs_super_block *rs;
1325 int fs_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001327 bh = sb_bread(s, offset / s->s_blocksize);
1328 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001329 reiserfs_warning(s, "sh-2006",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001330 "bread failed (dev %s, block %lu, size %lu)",
1331 reiserfs_bdevname(s), offset / s->s_blocksize,
1332 s->s_blocksize);
1333 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001336 rs = (struct reiserfs_super_block *)bh->b_data;
1337 if (!is_any_reiserfs_magic_string(rs)) {
1338 brelse(bh);
1339 return 1;
1340 }
1341 //
1342 // ok, reiserfs signature (old or new) found in at the given offset
Jeff Mahoney0222e652009-03-30 14:02:44 -04001343 //
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001344 fs_blocksize = sb_blocksize(rs);
1345 brelse(bh);
1346 sb_set_blocksize(s, fs_blocksize);
1347
1348 bh = sb_bread(s, offset / s->s_blocksize);
1349 if (!bh) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001350 reiserfs_warning(s, "sh-2007",
1351 "bread failed (dev %s, block %lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001352 reiserfs_bdevname(s), offset / s->s_blocksize,
1353 s->s_blocksize);
1354 return 1;
1355 }
1356
1357 rs = (struct reiserfs_super_block *)bh->b_data;
1358 if (sb_blocksize(rs) != s->s_blocksize) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001359 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1360 "filesystem on (dev %s, block %Lu, size %lu)",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001361 reiserfs_bdevname(s),
1362 (unsigned long long)bh->b_blocknr,
1363 s->s_blocksize);
1364 brelse(bh);
1365 return 1;
1366 }
1367
1368 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1369 brelse(bh);
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001370 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1371 "--rebuild-tree run detected. Please run\n"
1372 "reiserfsck --rebuild-tree and wait for a "
1373 "completion. If that fails\n"
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001374 "get newer reiserfsprogs package");
1375 return 1;
1376 }
1377
1378 SB_BUFFER_WITH_SB(s) = bh;
1379 SB_DISK_SUPER_BLOCK(s) = rs;
1380
1381 if (is_reiserfs_jr(rs)) {
1382 /* magic is of non-standard journal filesystem, look at s_version to
1383 find which format is in use */
1384 if (sb_version(rs) == REISERFS_VERSION_2)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001385 reiserfs_info(s, "found reiserfs format \"3.6\""
1386 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001387 else if (sb_version(rs) == REISERFS_VERSION_1)
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001388 reiserfs_info(s, "found reiserfs format \"3.5\""
1389 " with non-standard journal\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001390 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001391 reiserfs_warning(s, "sh-2012", "found unknown "
1392 "format \"%u\" of reiserfs with "
1393 "non-standard magic", sb_version(rs));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001394 return 1;
1395 }
1396 } else
1397 /* s_version of standard format may contain incorrect information,
1398 so we just look at the magic string */
1399 reiserfs_info(s,
1400 "found reiserfs format \"%s\" with standard journal\n",
1401 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1402
1403 s->s_op = &reiserfs_sops;
1404 s->s_export_op = &reiserfs_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405#ifdef CONFIG_QUOTA
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001406 s->s_qcop = &reiserfs_qctl_operations;
1407 s->dq_op = &reiserfs_quota_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408#endif
1409
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001410 /* new format is limited by the 32 bit wide i_blocks field, want to
1411 ** be one full block below that.
1412 */
1413 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1414 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415}
1416
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417/* after journal replay, reread all bitmap and super blocks */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001418static int reread_meta_blocks(struct super_block *s)
1419{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001420 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001421 reiserfs_write_unlock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001422 wait_on_buffer(SB_BUFFER_WITH_SB(s));
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001423 reiserfs_write_lock(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001424 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001425 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001426 return 1;
1427 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001429 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430}
1431
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432/////////////////////////////////////////////////////
1433// hash detection stuff
1434
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435// if root directory is empty - we set default - Yura's - hash and
1436// warn about it
1437// FIXME: we look for only one name in a directory. If tea and yura
1438// bith have the same value - we ask user to send report to the
1439// mailing list
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001440static __u32 find_hash_out(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001442 int retval;
1443 struct inode *inode;
1444 struct cpu_key key;
1445 INITIALIZE_PATH(path);
1446 struct reiserfs_dir_entry de;
1447 __u32 hash = DEFAULT_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001449 inode = s->s_root->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001451 do { // Some serious "goto"-hater was there ;)
1452 u32 teahash, r5hash, yurahash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001454 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1455 retval = search_by_entry_key(s, &key, &path, &de);
1456 if (retval == IO_ERROR) {
1457 pathrelse(&path);
1458 return UNSET_HASH;
1459 }
1460 if (retval == NAME_NOT_FOUND)
1461 de.de_entry_num--;
1462 set_de_name_and_namelen(&de);
1463 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1464 /* allow override in this case */
1465 if (reiserfs_rupasov_hash(s)) {
1466 hash = YURA_HASH;
1467 }
Jeff Mahoney1d889d92009-03-30 14:02:20 -04001468 reiserfs_info(s, "FS seems to be empty, autodetect "
1469 "is using the default hash\n");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001470 break;
1471 }
1472 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1473 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1474 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1475 if (((teahash == r5hash)
1476 &&
1477 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1478 == r5hash)) || ((teahash == yurahash)
1479 && (yurahash ==
1480 GET_HASH_VALUE(deh_offset
1481 (&
1482 (de.
1483 de_deh[de.
1484 de_entry_num])))))
1485 || ((r5hash == yurahash)
1486 && (yurahash ==
1487 GET_HASH_VALUE(deh_offset
1488 (&(de.de_deh[de.de_entry_num])))))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001489 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1490 "automatically detect hash function. "
1491 "Please mount with -o "
1492 "hash={tea,rupasov,r5}");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001493 hash = UNSET_HASH;
1494 break;
1495 }
1496 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1497 yurahash)
1498 hash = YURA_HASH;
1499 else if (GET_HASH_VALUE
1500 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1501 hash = TEA_HASH;
1502 else if (GET_HASH_VALUE
1503 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1504 hash = R5_HASH;
1505 else {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001506 reiserfs_warning(s, "reiserfs-2506",
1507 "Unrecognised hash function");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001508 hash = UNSET_HASH;
1509 }
1510 } while (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001512 pathrelse(&path);
1513 return hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514}
1515
1516// finds out which hash names are sorted with
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001517static int what_hash(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001519 __u32 code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001521 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001523 /* reiserfs_hash_detect() == true if any of the hash mount options
1524 ** were used. We must check them to make sure the user isn't
1525 ** using a bad hash value
1526 */
1527 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1528 code = find_hash_out(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001530 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
Jeff Mahoney0222e652009-03-30 14:02:44 -04001531 /* detection has found the hash, and we must check against the
1532 ** mount options
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001533 */
1534 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001535 reiserfs_warning(s, "reiserfs-2507",
1536 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001537 "unable to force rupasov hash",
1538 reiserfs_hashname(code));
1539 code = UNSET_HASH;
1540 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001541 reiserfs_warning(s, "reiserfs-2508",
1542 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001543 "unable to force tea hash",
1544 reiserfs_hashname(code));
1545 code = UNSET_HASH;
1546 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001547 reiserfs_warning(s, "reiserfs-2509",
1548 "Error, %s hash detected, "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001549 "unable to force r5 hash",
1550 reiserfs_hashname(code));
1551 code = UNSET_HASH;
1552 }
1553 } else {
1554 /* find_hash_out was not called or could not determine the hash */
1555 if (reiserfs_rupasov_hash(s)) {
1556 code = YURA_HASH;
1557 } else if (reiserfs_tea_hash(s)) {
1558 code = TEA_HASH;
1559 } else if (reiserfs_r5_hash(s)) {
1560 code = R5_HASH;
1561 }
1562 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
Jeff Mahoney0222e652009-03-30 14:02:44 -04001564 /* if we are mounted RW, and we have a new valid hash code, update
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001565 ** the super
1566 */
1567 if (code != UNSET_HASH &&
1568 !(s->s_flags & MS_RDONLY) &&
1569 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1570 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1571 }
1572 return code;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573}
1574
1575// return pointer to appropriate function
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001576static hashf_t hash_function(struct super_block *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001578 switch (what_hash(s)) {
1579 case TEA_HASH:
1580 reiserfs_info(s, "Using tea hash to sort names\n");
1581 return keyed_hash;
1582 case YURA_HASH:
1583 reiserfs_info(s, "Using rupasov hash to sort names\n");
1584 return yura_hash;
1585 case R5_HASH:
1586 reiserfs_info(s, "Using r5 hash to sort names\n");
1587 return r5_hash;
1588 }
1589 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590}
1591
1592// this is used to set up correct value for old partitions
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001593static int function2code(hashf_t func)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001595 if (func == keyed_hash)
1596 return TEA_HASH;
1597 if (func == yura_hash)
1598 return YURA_HASH;
1599 if (func == r5_hash)
1600 return R5_HASH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001602 BUG(); // should never happen
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001604 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605}
1606
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001607#define SWARN(silent, s, id, ...) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 if (!(silent)) \
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001609 reiserfs_warning(s, id, __VA_ARGS__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001611static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001613 struct inode *root_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001614 struct reiserfs_transaction_handle th;
1615 int old_format = 0;
1616 unsigned long blocks;
1617 unsigned int commit_max_age = 0;
1618 int jinit_done = 0;
1619 struct reiserfs_iget_args args;
1620 struct reiserfs_super_block *rs;
1621 char *jdev_name;
1622 struct reiserfs_sb_info *sbi;
1623 int errval = -EINVAL;
Jan Kara00b44192008-07-25 01:46:38 -07001624 char *qf_names[MAXQUOTAS] = {};
1625 unsigned int qfmt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626
Miklos Szeredicdf6ccc2008-02-08 04:21:47 -08001627 save_mount_options(s, data);
1628
Yan Burman01afb212006-12-06 20:39:01 -08001629 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001630 if (!sbi)
1631 return -ENOMEM;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001632 s->s_fs_info = sbi;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001633 /* Set default values for options: non-aggressive tails, RO on errors */
1634 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1635 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1636 /* no preallocation minimum, be smart in
1637 reiserfs_file_write instead */
1638 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1639 /* Preallocate by 16 blocks (17-1) at once */
1640 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001641 /* setup default block allocator options */
1642 reiserfs_init_alloc_options(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001644 mutex_init(&REISERFS_SB(s)->lock);
1645 REISERFS_SB(s)->lock_depth = -1;
1646
1647 /*
1648 * This function is called with the bkl, which also was the old
1649 * locking used here.
1650 * do_journal_begin() will soon check if we hold the lock (ie: was the
1651 * bkl). This is likely because do_journal_begin() has several another
1652 * callers because at this time, it doesn't seem to be necessary to
1653 * protect against anything.
1654 * Anyway, let's be conservative and lock for now.
1655 */
1656 reiserfs_write_lock(s);
1657
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001658 jdev_name = NULL;
1659 if (reiserfs_parse_options
1660 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
Jan Kara00b44192008-07-25 01:46:38 -07001661 &commit_max_age, qf_names, &qfmt) == 0) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001662 goto error;
1663 }
Jan Kara00b44192008-07-25 01:46:38 -07001664#ifdef CONFIG_QUOTA
1665 handle_quota_files(s, qf_names, &qfmt);
1666#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001668 if (blocks) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001669 SWARN(silent, s, "jmacd-7", "resize option for remount only");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001670 goto error;
1671 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001673 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1674 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1675 old_format = 1;
1676 /* try new format (64-th 1k block), which can contain reiserfs super block */
1677 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001678 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001679 reiserfs_bdevname(s));
1680 goto error;
1681 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001683 rs = SB_DISK_SUPER_BLOCK(s);
1684 /* Let's do basic sanity check to verify that underlying device is not
1685 smaller than the filesystem. If the check fails then abort and scream,
1686 because bad stuff will happen otherwise. */
1687 if (s->s_bdev && s->s_bdev->bd_inode
1688 && i_size_read(s->s_bdev->bd_inode) <
1689 sb_block_count(rs) * sb_blocksize(rs)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001690 SWARN(silent, s, "", "Filesystem cannot be "
1691 "mounted because it is bigger than the device");
1692 SWARN(silent, s, "", "You may need to run fsck "
1693 "or increase size of your LVM partition");
1694 SWARN(silent, s, "", "Or may be you forgot to "
1695 "reboot after fdisk when it told you to");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001696 goto error;
1697 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001699 sbi->s_mount_state = SB_REISERFS_STATE(s);
1700 sbi->s_mount_state = REISERFS_VALID_FS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701
Jeff Mahoney6f010462006-09-30 23:28:43 -07001702 if ((errval = reiserfs_init_bitmap_cache(s))) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001703 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001704 goto error;
1705 }
Jeff Mahoneyd2c89a42006-11-02 22:07:20 -08001706 errval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707#ifdef CONFIG_REISERFS_CHECK
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001708 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1709 SWARN(silent, s, "", "- it is slow mode for debugging.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710#endif
1711
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001712 /* make data=ordered the default */
1713 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1714 !reiserfs_data_writeback(s)) {
1715 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716 }
1717
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001718 if (reiserfs_data_log(s)) {
1719 reiserfs_info(s, "using journaled data mode\n");
1720 } else if (reiserfs_data_ordered(s)) {
1721 reiserfs_info(s, "using ordered data mode\n");
1722 } else {
1723 reiserfs_info(s, "using writeback data mode\n");
1724 }
1725 if (reiserfs_barrier_flush(s)) {
1726 printk("reiserfs: using flush barriers\n");
1727 }
1728 // set_device_ro(s->s_dev, 1) ;
1729 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001730 SWARN(silent, s, "sh-2022",
1731 "unable to initialize journal space");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001732 goto error;
1733 } else {
1734 jinit_done = 1; /* once this is set, journal_release must be called
1735 ** if we error out of the mount
1736 */
1737 }
1738 if (reread_meta_blocks(s)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001739 SWARN(silent, s, "jmacd-9",
1740 "unable to reread meta blocks after journal init");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001741 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 }
1743
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001744 if (replay_only(s))
1745 goto error;
1746
1747 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001748 SWARN(silent, s, "clm-7000",
1749 "Detected readonly device, marking FS readonly");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001750 s->s_flags |= MS_RDONLY;
1751 }
1752 args.objectid = REISERFS_ROOT_OBJECTID;
1753 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1754 root_inode =
1755 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1756 reiserfs_init_locked_inode, (void *)(&args));
1757 if (!root_inode) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001758 SWARN(silent, s, "jmacd-10", "get root inode failed");
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001759 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 }
1761
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001762 if (root_inode->i_state & I_NEW) {
1763 reiserfs_read_locked_inode(root_inode, &args);
1764 unlock_new_inode(root_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 }
1766
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001767 s->s_root = d_alloc_root(root_inode);
1768 if (!s->s_root) {
1769 iput(root_inode);
1770 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001772 // define and initialize hash function
1773 sbi->s_hash_function = hash_function(s);
1774 if (sbi->s_hash_function == NULL) {
1775 dput(s->s_root);
1776 s->s_root = NULL;
1777 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001779
1780 if (is_reiserfs_3_5(rs)
1781 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1782 set_bit(REISERFS_3_5, &(sbi->s_properties));
Jeff Mahoneye1fabd32006-09-30 23:28:40 -07001783 else if (old_format)
1784 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001785 else
1786 set_bit(REISERFS_3_6, &(sbi->s_properties));
1787
1788 if (!(s->s_flags & MS_RDONLY)) {
1789
1790 errval = journal_begin(&th, s, 1);
1791 if (errval) {
1792 dput(s->s_root);
1793 s->s_root = NULL;
1794 goto error;
1795 }
1796 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1797
1798 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1799 set_sb_fs_state(rs, 0);
1800
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001801 /* Clear out s_bmap_nr if it would wrap. We can handle this
1802 * case, but older revisions can't. This will cause the
1803 * file system to fail mount on those older implementations,
1804 * avoiding corruption. -jeffm */
1805 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1806 sb_bmap_nr(rs) != 0) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04001807 reiserfs_warning(s, "super-2030", "This file system "
Jeff Mahoneycb680c12007-10-18 23:39:27 -07001808 "claims to use %u bitmap blocks in "
1809 "its super block, but requires %u. "
1810 "Clearing to zero.", sb_bmap_nr(rs),
1811 reiserfs_bmap_count(s));
1812
1813 set_sb_bmap_nr(rs, 0);
1814 }
1815
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001816 if (old_format_only(s)) {
1817 /* filesystem of format 3.5 either with standard or non-standard
1818 journal */
1819 if (convert_reiserfs(s)) {
1820 /* and -o conv is given */
1821 if (!silent)
1822 reiserfs_info(s,
1823 "converting 3.5 filesystem to the 3.6 format");
1824
1825 if (is_reiserfs_3_5(rs))
1826 /* put magic string of 3.6 format. 2.2 will not be able to
1827 mount this filesystem anymore */
1828 memcpy(rs->s_v1.s_magic,
1829 reiserfs_3_6_magic_string,
1830 sizeof
1831 (reiserfs_3_6_magic_string));
1832
1833 set_sb_version(rs, REISERFS_VERSION_2);
1834 reiserfs_convert_objectid_map_v1(s);
1835 set_bit(REISERFS_3_6, &(sbi->s_properties));
1836 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1837 } else if (!silent) {
1838 reiserfs_info(s, "using 3.5.x disk format\n");
1839 }
Jeff Mahoney702d21c2009-03-30 14:02:16 -04001840 } else
1841 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1842
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001843
1844 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1845 errval = journal_end(&th, s, 1);
1846 if (errval) {
1847 dput(s->s_root);
1848 s->s_root = NULL;
1849 goto error;
1850 }
1851
Al Viroedcc37a2009-05-03 06:00:05 -04001852 if ((errval = reiserfs_lookup_privroot(s)) ||
1853 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001854 dput(s->s_root);
1855 s->s_root = NULL;
1856 goto error;
1857 }
1858
1859 /* look for files which were to be removed in previous session */
1860 finish_unfinished(s);
1861 } else {
1862 if (old_format_only(s) && !silent) {
1863 reiserfs_info(s, "using 3.5.x disk format\n");
1864 }
1865
Al Viroedcc37a2009-05-03 06:00:05 -04001866 if ((errval = reiserfs_lookup_privroot(s)) ||
1867 (errval = reiserfs_xattr_init(s, s->s_flags))) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001868 dput(s->s_root);
1869 s->s_root = NULL;
1870 goto error;
1871 }
1872 }
1873 // mark hash in super block: it could be unset. overwrite should be ok
1874 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1875
1876 handle_attrs(s);
1877
1878 reiserfs_proc_info_init(s);
1879
1880 init_waitqueue_head(&(sbi->s_wait));
1881 spin_lock_init(&sbi->bitmap_lock);
1882
Frederic Weisbecker8ebc4232009-04-07 04:19:49 +02001883 reiserfs_write_unlock(s);
1884
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001885 return (0);
1886
Jan Kara00b44192008-07-25 01:46:38 -07001887error:
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001888 if (jinit_done) { /* kill the commit thread, free journal ram */
1889 journal_release_error(NULL, s);
1890 }
Jeff Mahoney50652272006-09-30 23:28:44 -07001891
Jeff Mahoneyb7b7fa42010-03-29 15:12:39 -04001892 reiserfs_write_unlock(s);
1893
Jeff Mahoney50652272006-09-30 23:28:44 -07001894 reiserfs_free_bitmap_cache(s);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001895 if (SB_BUFFER_WITH_SB(s))
1896 brelse(SB_BUFFER_WITH_SB(s));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897#ifdef CONFIG_QUOTA
Jeff Mahoney50652272006-09-30 23:28:44 -07001898 {
1899 int j;
Jan Kara00b44192008-07-25 01:46:38 -07001900 for (j = 0; j < MAXQUOTAS; j++)
1901 kfree(qf_names[j]);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001902 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903#endif
James Lamanna833d3042005-10-30 15:00:16 -08001904 kfree(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001906 s->s_fs_info = NULL;
1907 return errval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908}
1909
David Howells726c3342006-06-23 02:02:58 -07001910static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911{
David Howells726c3342006-06-23 02:02:58 -07001912 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001913
1914 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1915 buf->f_bfree = sb_free_blocks(rs);
1916 buf->f_bavail = buf->f_bfree;
1917 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
David Howells726c3342006-06-23 02:02:58 -07001918 buf->f_bsize = dentry->d_sb->s_blocksize;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001919 /* changed to accommodate gcc folks. */
1920 buf->f_type = REISERFS_SUPER_MAGIC;
Coly Li651d0622009-04-02 16:59:41 -07001921 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
1922 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
1923 sizeof(rs->s_uuid)/2);
1924
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001925 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926}
1927
1928#ifdef CONFIG_QUOTA
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929static int reiserfs_write_dquot(struct dquot *dquot)
1930{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001931 struct reiserfs_transaction_handle th;
1932 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001934 reiserfs_write_lock(dquot->dq_sb);
1935 ret =
1936 journal_begin(&th, dquot->dq_sb,
1937 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1938 if (ret)
1939 goto out;
1940 ret = dquot_commit(dquot);
1941 err =
1942 journal_end(&th, dquot->dq_sb,
1943 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1944 if (!ret && err)
1945 ret = err;
1946 out:
1947 reiserfs_write_unlock(dquot->dq_sb);
1948 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949}
1950
1951static int reiserfs_acquire_dquot(struct dquot *dquot)
1952{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001953 struct reiserfs_transaction_handle th;
1954 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001956 reiserfs_write_lock(dquot->dq_sb);
1957 ret =
1958 journal_begin(&th, dquot->dq_sb,
1959 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1960 if (ret)
1961 goto out;
1962 ret = dquot_acquire(dquot);
1963 err =
1964 journal_end(&th, dquot->dq_sb,
1965 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1966 if (!ret && err)
1967 ret = err;
1968 out:
1969 reiserfs_write_unlock(dquot->dq_sb);
1970 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971}
1972
1973static int reiserfs_release_dquot(struct dquot *dquot)
1974{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001975 struct reiserfs_transaction_handle th;
1976 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001978 reiserfs_write_lock(dquot->dq_sb);
1979 ret =
1980 journal_begin(&th, dquot->dq_sb,
1981 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
Jan Kara9c3013e2007-09-11 15:23:29 -07001982 if (ret) {
1983 /* Release dquot anyway to avoid endless cycle in dqput() */
1984 dquot_release(dquot);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001985 goto out;
Jan Kara9c3013e2007-09-11 15:23:29 -07001986 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07001987 ret = dquot_release(dquot);
1988 err =
1989 journal_end(&th, dquot->dq_sb,
1990 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1991 if (!ret && err)
1992 ret = err;
1993 out:
1994 reiserfs_write_unlock(dquot->dq_sb);
1995 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996}
1997
1998static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1999{
Jan Kara45065672008-07-25 01:46:37 -07002000 /* Are we journaling quotas? */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002001 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2002 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2003 dquot_mark_dquot_dirty(dquot);
2004 return reiserfs_write_dquot(dquot);
2005 } else
2006 return dquot_mark_dquot_dirty(dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007}
2008
2009static int reiserfs_write_info(struct super_block *sb, int type)
2010{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002011 struct reiserfs_transaction_handle th;
2012 int ret, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002014 /* Data block + inode block */
2015 reiserfs_write_lock(sb);
2016 ret = journal_begin(&th, sb, 2);
2017 if (ret)
2018 goto out;
2019 ret = dquot_commit_info(sb, type);
2020 err = journal_end(&th, sb, 2);
2021 if (!ret && err)
2022 ret = err;
2023 out:
2024 reiserfs_write_unlock(sb);
2025 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026}
2027
2028/*
Christoph Hellwig84de8562005-06-23 00:09:16 -07002029 * Turn on quotas during mount time - we need to find the quota file and such...
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030 */
2031static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2032{
Christoph Hellwig287a8092010-05-19 07:16:45 -04002033 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2034 REISERFS_SB(sb)->s_jquota_fmt, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035}
2036
2037/*
2038 * Standard function to be called on quota_on
2039 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002040static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
Christoph Hellwig307ae182010-05-19 07:16:43 -04002041 char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002043 int err;
Al Viro82646132008-08-02 00:57:06 -04002044 struct path path;
Jan Karad5dee5c2008-04-28 02:16:23 -07002045 struct inode *inode;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002046 struct reiserfs_transaction_handle th;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002048 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2049 return -EINVAL;
Christoph Hellwig307ae182010-05-19 07:16:43 -04002050
Al Viro82646132008-08-02 00:57:06 -04002051 err = kern_path(name, LOOKUP_FOLLOW, &path);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002052 if (err)
2053 return err;
2054 /* Quotafile not on the same filesystem? */
Al Viro82646132008-08-02 00:57:06 -04002055 if (path.mnt->mnt_sb != sb) {
Al Viro77e69da2008-08-01 04:29:18 -04002056 err = -EXDEV;
2057 goto out;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002058 }
Al Viro82646132008-08-02 00:57:06 -04002059 inode = path.dentry->d_inode;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002060 /* We must not pack tails for quota files on reiserfs for quota IO to work */
Jan Karad5dee5c2008-04-28 02:16:23 -07002061 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2062 err = reiserfs_unpack(inode, NULL);
2063 if (err) {
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002064 reiserfs_warning(sb, "super-6520",
2065 "Unpacking tail of quota file failed"
Jan Karad5dee5c2008-04-28 02:16:23 -07002066 " (%d). Cannot turn on quotas.", err);
Al Viro77e69da2008-08-01 04:29:18 -04002067 err = -EINVAL;
2068 goto out;
Jan Karad5dee5c2008-04-28 02:16:23 -07002069 }
2070 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002071 }
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002072 /* Journaling quota? */
2073 if (REISERFS_SB(sb)->s_qf_names[type]) {
2074 /* Quotafile not of fs root? */
Al Viro82646132008-08-02 00:57:06 -04002075 if (path.dentry->d_parent != sb->s_root)
Jeff Mahoney45b03d52009-03-30 14:02:21 -04002076 reiserfs_warning(sb, "super-6521",
2077 "Quota file not on filesystem root. "
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002078 "Journalled quota will not work.");
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002079 }
2080
2081 /*
2082 * When we journal data on quota file, we have to flush journal to see
2083 * all updates to the file when we bypass pagecache...
2084 */
2085 if (reiserfs_file_data_log(inode)) {
2086 /* Just start temporary transaction and finish it */
2087 err = journal_begin(&th, sb, 1);
2088 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002089 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002090 err = journal_end_sync(&th, sb, 1);
2091 if (err)
Al Viro77e69da2008-08-01 04:29:18 -04002092 goto out;
Jan Kara5d4f7fd2008-07-25 01:46:36 -07002093 }
Christoph Hellwig287a8092010-05-19 07:16:45 -04002094 err = dquot_quota_on_path(sb, type, format_id, &path);
Al Viro77e69da2008-08-01 04:29:18 -04002095out:
Al Viro82646132008-08-02 00:57:06 -04002096 path_put(&path);
Al Viro77e69da2008-08-01 04:29:18 -04002097 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098}
2099
2100/* Read data from quotafile - avoid pagecache and such because we cannot afford
2101 * acquiring the locks... As quota files are never truncated and quota code
2102 * itself serializes the operations (and noone else should touch the files)
2103 * we don't have to be afraid of races */
2104static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2105 size_t len, loff_t off)
2106{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002107 struct inode *inode = sb_dqopt(sb)->files[type];
2108 unsigned long blk = off >> sb->s_blocksize_bits;
2109 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2110 size_t toread;
2111 struct buffer_head tmp_bh, *bh;
2112 loff_t i_size = i_size_read(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002114 if (off > i_size)
2115 return 0;
2116 if (off + len > i_size)
2117 len = i_size - off;
2118 toread = len;
2119 while (toread > 0) {
2120 tocopy =
2121 sb->s_blocksize - offset <
2122 toread ? sb->s_blocksize - offset : toread;
2123 tmp_bh.b_state = 0;
2124 /* Quota files are without tails so we can safely use this function */
2125 reiserfs_write_lock(sb);
2126 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2127 reiserfs_write_unlock(sb);
2128 if (err)
2129 return err;
2130 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2131 memset(data, 0, tocopy);
2132 else {
2133 bh = sb_bread(sb, tmp_bh.b_blocknr);
2134 if (!bh)
2135 return -EIO;
2136 memcpy(data, bh->b_data + offset, tocopy);
2137 brelse(bh);
2138 }
2139 offset = 0;
2140 toread -= tocopy;
2141 data += tocopy;
2142 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002144 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145}
2146
2147/* Write to quotafile (we know the transaction is already started and has
2148 * enough credits) */
2149static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2150 const char *data, size_t len, loff_t off)
2151{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002152 struct inode *inode = sb_dqopt(sb)->files[type];
2153 unsigned long blk = off >> sb->s_blocksize_bits;
2154 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2155 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2156 size_t towrite = len;
2157 struct buffer_head tmp_bh, *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158
Jan Kara9c3013e2007-09-11 15:23:29 -07002159 if (!current->journal_info) {
2160 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2161 " cancelled because transaction is not started.\n",
2162 (unsigned long long)off, (unsigned long long)len);
2163 return -EIO;
2164 }
Arjan van de Ven5c81a412006-07-03 00:25:20 -07002165 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002166 while (towrite > 0) {
2167 tocopy = sb->s_blocksize - offset < towrite ?
2168 sb->s_blocksize - offset : towrite;
2169 tmp_bh.b_state = 0;
2170 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2171 if (err)
2172 goto out;
2173 if (offset || tocopy != sb->s_blocksize)
2174 bh = sb_bread(sb, tmp_bh.b_blocknr);
2175 else
2176 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2177 if (!bh) {
2178 err = -EIO;
2179 goto out;
2180 }
2181 lock_buffer(bh);
2182 memcpy(bh->b_data + offset, data, tocopy);
2183 flush_dcache_page(bh->b_page);
2184 set_buffer_uptodate(bh);
2185 unlock_buffer(bh);
2186 reiserfs_prepare_for_journal(sb, bh, 1);
2187 journal_mark_dirty(current->journal_info, sb, bh);
2188 if (!journal_quota)
2189 reiserfs_add_ordered_list(inode, bh);
2190 brelse(bh);
2191 offset = 0;
2192 towrite -= tocopy;
2193 data += tocopy;
2194 blk++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195 }
Jan Kara9c3013e2007-09-11 15:23:29 -07002196out:
Jan Kara10dd08d2008-07-04 09:59:34 -07002197 if (len == towrite) {
2198 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002199 return err;
Jan Kara10dd08d2008-07-04 09:59:34 -07002200 }
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002201 if (inode->i_size < off + len - towrite)
2202 i_size_write(inode, off + len - towrite);
2203 inode->i_version++;
2204 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2205 mark_inode_dirty(inode);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08002206 mutex_unlock(&inode->i_mutex);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002207 return len - towrite;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208}
2209
2210#endif
2211
David Howells454e2392006-06-23 02:02:57 -07002212static int get_super_block(struct file_system_type *fs_type,
2213 int flags, const char *dev_name,
2214 void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215{
David Howells454e2392006-06-23 02:02:57 -07002216 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2217 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218}
2219
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002220static int __init init_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221{
2222 int ret;
2223
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002224 if ((ret = init_inodecache())) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 return ret;
2226 }
2227
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002228 reiserfs_proc_info_global_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002230 ret = register_filesystem(&reiserfs_fs_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002231
2232 if (ret == 0) {
2233 return 0;
2234 }
2235
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002236 reiserfs_proc_info_global_done();
2237 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238
2239 return ret;
2240}
2241
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002242static void __exit exit_reiserfs_fs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002244 reiserfs_proc_info_global_done();
2245 unregister_filesystem(&reiserfs_fs_type);
2246 destroy_inodecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002247}
2248
2249struct file_system_type reiserfs_fs_type = {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002250 .owner = THIS_MODULE,
2251 .name = "reiserfs",
2252 .get_sb = get_super_block,
David Howellsedc666e2006-10-11 01:22:14 -07002253 .kill_sb = reiserfs_kill_sb,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002254 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255};
2256
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002257MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2258MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2259MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07002261module_init(init_reiserfs_fs);
2262module_exit(exit_reiserfs_fs);