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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) International Business Machines Corp., 2000-2004
3 * Portions Copyright (C) Christoph Hellwig, 2001-2002
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
Dave Kleikamp63f83c92006-10-02 09:55:27 -05007 * the Free Software Foundation; either version 2 of the License, or
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * (at your option) any later version.
Dave Kleikamp63f83c92006-10-02 09:55:27 -05009 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
Dave Kleikamp63f83c92006-10-02 09:55:27 -050016 * along with this program; if not, write to the Free Software
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/module.h>
22#include <linux/parser.h>
23#include <linux/completion.h>
24#include <linux/vfs.h>
Jan Kara74abb982008-07-25 01:46:51 -070025#include <linux/quotaops.h>
Mark Bellon8fc27512005-09-06 15:16:54 -070026#include <linux/mount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/moduleparam.h>
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -060028#include <linux/kthread.h>
Christoph Hellwig9a59f452005-06-23 00:10:19 -070029#include <linux/posix_acl.h>
Dave Kleikamp115ff502006-07-26 14:52:13 -050030#include <linux/buffer_head.h>
Christoph Hellwiga5694252007-07-17 04:04:28 -070031#include <linux/exportfs.h>
Coly Lib5c816a2009-01-21 00:05:39 +080032#include <linux/crc32.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090033#include <linux/slab.h>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080034#include <linux/uaccess.h>
Mark Bellon8fc27512005-09-06 15:16:54 -070035#include <linux/seq_file.h>
Tino Reichardtb40c2e62012-09-17 11:58:19 -050036#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38#include "jfs_incore.h"
39#include "jfs_filsys.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050040#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include "jfs_metapage.h"
42#include "jfs_superblock.h"
43#include "jfs_dmap.h"
44#include "jfs_imap.h"
45#include "jfs_acl.h"
46#include "jfs_debug.h"
Christoph Hellwig2cc6a5a2013-12-20 05:16:51 -080047#include "jfs_xattr.h"
Jan Kara12fd0862017-04-11 16:21:01 +020048#include "jfs_dinode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
51MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
52MODULE_LICENSE("GPL");
53
Fabian Frederick789602e2014-05-22 10:42:24 +100054static struct kmem_cache *jfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -080056static const struct super_operations jfs_super_operations;
Christoph Hellwig39655162007-10-21 16:42:17 -070057static const struct export_operations jfs_export_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058static struct file_system_type jfs_fs_type;
59
60#define MAX_COMMIT_THREADS 64
Fabian Frederick789602e2014-05-22 10:42:24 +100061static int commit_threads;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062module_param(commit_threads, int, 0);
63MODULE_PARM_DESC(commit_threads, "Number of commit threads");
64
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -060065static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
66struct task_struct *jfsIOthread;
67struct task_struct *jfsSyncThread;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69#ifdef CONFIG_JFS_DEBUG
70int jfsloglevel = JFS_LOGLEVEL_WARN;
71module_param(jfsloglevel, int, 0644);
72MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
73#endif
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075static void jfs_handle_error(struct super_block *sb)
76{
77 struct jfs_sb_info *sbi = JFS_SBI(sb);
78
David Howellsbc98a422017-07-17 08:45:34 +010079 if (sb_rdonly(sb))
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return;
81
82 updateSuper(sb, FM_DIRTY);
83
84 if (sbi->flag & JFS_ERR_PANIC)
85 panic("JFS (device %s): panic forced after error\n",
86 sb->s_id);
87 else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
Joe Perchesb18db6d2016-03-30 05:23:16 -070088 jfs_err("ERROR: (device %s): remounting filesystem as read-only",
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 sb->s_id);
90 sb->s_flags |= MS_RDONLY;
Dave Kleikamp63f83c92006-10-02 09:55:27 -050091 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93 /* nothing is done for continue beyond marking the superblock dirty */
94}
95
Joe Percheseb8630d2013-06-04 16:39:15 -070096void jfs_error(struct super_block *sb, const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097{
Joe Percheseb8630d2013-06-04 16:39:15 -070098 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 va_list args;
100
Joe Percheseb8630d2013-06-04 16:39:15 -0700101 va_start(args, fmt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Joe Percheseb8630d2013-06-04 16:39:15 -0700103 vaf.fmt = fmt;
104 vaf.va = &args;
105
Scott Wood7d2ac452015-03-11 22:13:54 -0500106 pr_err("ERROR: (device %s): %ps: %pV\n",
Joe Percheseb8630d2013-06-04 16:39:15 -0700107 sb->s_id, __builtin_return_address(0), &vaf);
108
109 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
111 jfs_handle_error(sb);
112}
113
114static struct inode *jfs_alloc_inode(struct super_block *sb)
115{
116 struct jfs_inode_info *jfs_inode;
117
118 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
119 if (!jfs_inode)
120 return NULL;
Jan Kara507e1fa2014-10-01 11:19:12 +0200121#ifdef CONFIG_QUOTA
122 memset(&jfs_inode->i_dquot, 0, sizeof(jfs_inode->i_dquot));
123#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 return &jfs_inode->vfs_inode;
125}
126
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100127static void jfs_i_callback(struct rcu_head *head)
128{
129 struct inode *inode = container_of(head, struct inode, i_rcu);
130 struct jfs_inode_info *ji = JFS_IP(inode);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100131 kmem_cache_free(jfs_inode_cachep, ji);
132}
133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134static void jfs_destroy_inode(struct inode *inode)
135{
136 struct jfs_inode_info *ji = JFS_IP(inode);
137
Dave Kleikamp8a9cd6d2005-08-10 11:14:39 -0500138 BUG_ON(!list_empty(&ji->anon_inode_list));
139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 spin_lock_irq(&ji->ag_lock);
141 if (ji->active_ag != -1) {
142 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
143 atomic_dec(&bmap->db_active[ji->active_ag]);
144 ji->active_ag = -1;
145 }
146 spin_unlock_irq(&ji->ag_lock);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100147 call_rcu(&inode->i_rcu, jfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148}
149
David Howells726c3342006-06-23 02:02:58 -0700150static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151{
David Howells726c3342006-06-23 02:02:58 -0700152 struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 s64 maxinodes;
154 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
155
156 jfs_info("In jfs_statfs");
157 buf->f_type = JFS_SUPER_MAGIC;
158 buf->f_bsize = sbi->bsize;
159 buf->f_blocks = sbi->bmap->db_mapsize;
160 buf->f_bfree = sbi->bmap->db_nfree;
161 buf->f_bavail = sbi->bmap->db_nfree;
162 /*
163 * If we really return the number of allocated & free inodes, some
164 * applications will fail because they won't see enough free inodes.
Philippe De Muyter4de80272013-01-16 22:55:48 +0100165 * We'll try to calculate some guess as to how many inodes we can
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 * really allocate
167 *
168 * buf->f_files = atomic_read(&imap->im_numinos);
169 * buf->f_ffree = atomic_read(&imap->im_numfree);
170 */
171 maxinodes = min((s64) atomic_read(&imap->im_numinos) +
172 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
173 << L2INOSPEREXT), (s64) 0xffffffffLL);
174 buf->f_files = maxinodes;
175 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
176 atomic_read(&imap->im_numfree));
Coly Lib5c816a2009-01-21 00:05:39 +0800177 buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
178 buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
179 sizeof(sbi->uuid)/2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
181 buf->f_namelen = JFS_NAME_MAX;
182 return 0;
183}
184
Jan Kara12fd0862017-04-11 16:21:01 +0200185#ifdef CONFIG_QUOTA
186static int jfs_quota_off(struct super_block *sb, int type);
187static int jfs_quota_on(struct super_block *sb, int type, int format_id,
188 const struct path *path);
189
190static void jfs_quota_off_umount(struct super_block *sb)
191{
192 int type;
193
194 for (type = 0; type < MAXQUOTAS; type++)
195 jfs_quota_off(sb, type);
196}
197
198static const struct quotactl_ops jfs_quotactl_ops = {
199 .quota_on = jfs_quota_on,
200 .quota_off = jfs_quota_off,
201 .quota_sync = dquot_quota_sync,
202 .get_state = dquot_get_state,
203 .set_info = dquot_set_dqinfo,
204 .get_dqblk = dquot_get_dqblk,
205 .set_dqblk = dquot_set_dqblk,
206 .get_nextdqblk = dquot_get_next_dqblk,
207};
208#else
209static inline void jfs_quota_off_umount(struct super_block *sb)
210{
211}
212#endif
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214static void jfs_put_super(struct super_block *sb)
215{
216 struct jfs_sb_info *sbi = JFS_SBI(sb);
217 int rc;
218
219 jfs_info("In jfs_put_super");
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200220
Jan Kara12fd0862017-04-11 16:21:01 +0200221 jfs_quota_off_umount(sb);
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 rc = jfs_umount(sb);
224 if (rc)
225 jfs_err("jfs_umount failed with return code %d", rc);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000226
227 unload_nls(sbi->nls_tab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600229 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
230 iput(sbi->direct_inode);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 kfree(sbi);
233}
234
235enum {
236 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
Mark Bellon8fc27512005-09-06 15:16:54 -0700237 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500238 Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask,
239 Opt_discard, Opt_nodiscard, Opt_discard_minblk
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240};
241
Steven Whitehousea447c092008-10-13 10:46:57 +0100242static const match_table_t tokens = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 {Opt_integrity, "integrity"},
244 {Opt_nointegrity, "nointegrity"},
245 {Opt_iocharset, "iocharset=%s"},
246 {Opt_resize, "resize=%u"},
247 {Opt_resize_nosize, "resize"},
248 {Opt_errors, "errors=%s"},
249 {Opt_ignore, "noquota"},
250 {Opt_ignore, "quota"},
Mark Bellon8fc27512005-09-06 15:16:54 -0700251 {Opt_usrquota, "usrquota"},
252 {Opt_grpquota, "grpquota"},
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600253 {Opt_uid, "uid=%u"},
254 {Opt_gid, "gid=%u"},
255 {Opt_umask, "umask=%u"},
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500256 {Opt_discard, "discard"},
257 {Opt_nodiscard, "nodiscard"},
258 {Opt_discard_minblk, "discard=%u"},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 {Opt_err, NULL}
260};
261
262static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
263 int *flag)
264{
265 void *nls_map = (void *)-1; /* -1: no change; NULL: none */
266 char *p;
267 struct jfs_sb_info *sbi = JFS_SBI(sb);
268
269 *newLVSize = 0;
270
271 if (!options)
272 return 1;
273
274 while ((p = strsep(&options, ",")) != NULL) {
275 substring_t args[MAX_OPT_ARGS];
276 int token;
277 if (!*p)
278 continue;
279
280 token = match_token(p, tokens, args);
281 switch (token) {
282 case Opt_integrity:
283 *flag &= ~JFS_NOINTEGRITY;
284 break;
285 case Opt_nointegrity:
286 *flag |= JFS_NOINTEGRITY;
287 break;
288 case Opt_ignore:
289 /* Silently ignore the quota options */
290 /* Don't do anything ;-) */
291 break;
292 case Opt_iocharset:
293 if (nls_map && nls_map != (void *) -1)
294 unload_nls(nls_map);
295 if (!strcmp(args[0].from, "none"))
296 nls_map = NULL;
297 else {
298 nls_map = load_nls(args[0].from);
299 if (!nls_map) {
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500300 pr_err("JFS: charset not found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 goto cleanup;
302 }
303 }
304 break;
305 case Opt_resize:
306 {
307 char *resize = args[0].from;
Fabian Frederickbb5e50a2014-05-21 20:29:29 +0200308 int rc = kstrtoll(resize, 0, newLVSize);
309
310 if (rc)
311 goto cleanup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 break;
313 }
314 case Opt_resize_nosize:
315 {
Fabian Frederick684666e2017-01-23 18:50:23 +0100316 *newLVSize = i_size_read(sb->s_bdev->bd_inode) >>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 sb->s_blocksize_bits;
318 if (*newLVSize == 0)
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500319 pr_err("JFS: Cannot determine volume size\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 break;
321 }
322 case Opt_errors:
323 {
324 char *errors = args[0].from;
325 if (!errors || !*errors)
326 goto cleanup;
327 if (!strcmp(errors, "continue")) {
328 *flag &= ~JFS_ERR_REMOUNT_RO;
329 *flag &= ~JFS_ERR_PANIC;
330 *flag |= JFS_ERR_CONTINUE;
331 } else if (!strcmp(errors, "remount-ro")) {
332 *flag &= ~JFS_ERR_CONTINUE;
333 *flag &= ~JFS_ERR_PANIC;
334 *flag |= JFS_ERR_REMOUNT_RO;
335 } else if (!strcmp(errors, "panic")) {
336 *flag &= ~JFS_ERR_CONTINUE;
337 *flag &= ~JFS_ERR_REMOUNT_RO;
338 *flag |= JFS_ERR_PANIC;
339 } else {
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500340 pr_err("JFS: %s is an invalid error handler\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 errors);
342 goto cleanup;
343 }
344 break;
345 }
Mark Bellon8fc27512005-09-06 15:16:54 -0700346
Dave Kleikamp115ff502006-07-26 14:52:13 -0500347#ifdef CONFIG_QUOTA
Mark Bellon8fc27512005-09-06 15:16:54 -0700348 case Opt_quota:
349 case Opt_usrquota:
350 *flag |= JFS_USRQUOTA;
351 break;
352 case Opt_grpquota:
353 *flag |= JFS_GRPQUOTA;
354 break;
355#else
356 case Opt_usrquota:
357 case Opt_grpquota:
358 case Opt_quota:
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500359 pr_err("JFS: quota operations not supported\n");
Mark Bellon8fc27512005-09-06 15:16:54 -0700360 break;
361#endif
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600362 case Opt_uid:
363 {
364 char *uid = args[0].from;
Fabian Frederickbb5e50a2014-05-21 20:29:29 +0200365 uid_t val;
366 int rc = kstrtouint(uid, 0, &val);
367
368 if (rc)
369 goto cleanup;
Eric W. Biedermanc18cdc12012-02-10 11:40:34 -0800370 sbi->uid = make_kuid(current_user_ns(), val);
371 if (!uid_valid(sbi->uid))
372 goto cleanup;
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600373 break;
374 }
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500375
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600376 case Opt_gid:
377 {
378 char *gid = args[0].from;
Fabian Frederickbb5e50a2014-05-21 20:29:29 +0200379 gid_t val;
380 int rc = kstrtouint(gid, 0, &val);
381
382 if (rc)
383 goto cleanup;
Eric W. Biedermanc18cdc12012-02-10 11:40:34 -0800384 sbi->gid = make_kgid(current_user_ns(), val);
385 if (!gid_valid(sbi->gid))
386 goto cleanup;
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600387 break;
388 }
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500389
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600390 case Opt_umask:
391 {
392 char *umask = args[0].from;
Fabian Frederickbb5e50a2014-05-21 20:29:29 +0200393 int rc = kstrtouint(umask, 8, &sbi->umask);
394
395 if (rc)
396 goto cleanup;
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600397 if (sbi->umask & ~0777) {
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500398 pr_err("JFS: Invalid value of umask\n");
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600399 goto cleanup;
400 }
401 break;
402 }
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500403
404 case Opt_discard:
405 {
406 struct request_queue *q = bdev_get_queue(sb->s_bdev);
407 /* if set to 1, even copying files will cause
408 * trimming :O
409 * -> user has more control over the online trimming
410 */
411 sbi->minblks_trim = 64;
Fabian Frederick789602e2014-05-22 10:42:24 +1000412 if (blk_queue_discard(q))
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500413 *flag |= JFS_DISCARD;
Fabian Frederick789602e2014-05-22 10:42:24 +1000414 else
415 pr_err("JFS: discard option not supported on device\n");
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500416 break;
417 }
418
419 case Opt_nodiscard:
420 *flag &= ~JFS_DISCARD;
421 break;
422
423 case Opt_discard_minblk:
424 {
425 struct request_queue *q = bdev_get_queue(sb->s_bdev);
426 char *minblks_trim = args[0].from;
Fabian Frederickbb5e50a2014-05-21 20:29:29 +0200427 int rc;
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500428 if (blk_queue_discard(q)) {
429 *flag |= JFS_DISCARD;
Fabian Frederickbb5e50a2014-05-21 20:29:29 +0200430 rc = kstrtouint(minblks_trim, 0,
431 &sbi->minblks_trim);
432 if (rc)
433 goto cleanup;
434 } else
Fabian Frederick789602e2014-05-22 10:42:24 +1000435 pr_err("JFS: discard option not supported on device\n");
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500436 break;
437 }
438
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 default:
Fabian Frederick789602e2014-05-22 10:42:24 +1000440 printk("jfs: Unrecognized mount option \"%s\" or missing value\n",
441 p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 goto cleanup;
443 }
444 }
445
446 if (nls_map != (void *) -1) {
447 /* Discard old (if remount) */
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000448 unload_nls(sbi->nls_tab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 sbi->nls_tab = nls_map;
450 }
451 return 1;
452
453cleanup:
454 if (nls_map && nls_map != (void *) -1)
455 unload_nls(nls_map);
456 return 0;
457}
458
459static int jfs_remount(struct super_block *sb, int *flags, char *data)
460{
461 s64 newLVSize = 0;
462 int rc = 0;
463 int flag = JFS_SBI(sb)->flag;
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200464 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
Theodore Ts'o02b99842014-03-13 10:14:33 -0400466 sync_filesystem(sb);
Fabian Frederick789602e2014-05-22 10:42:24 +1000467 if (!parse_options(data, sb, &newLVSize, &flag))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 return -EINVAL;
Jan Blunck22b26db2010-02-24 13:25:31 +0100469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 if (newLVSize) {
David Howellsbc98a422017-07-17 08:45:34 +0100471 if (sb_rdonly(sb)) {
Fabian Frederick789602e2014-05-22 10:42:24 +1000472 pr_err("JFS: resize requires volume to be mounted read-write\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 return -EROFS;
474 }
475 rc = jfs_extendfs(sb, newLVSize, 0);
Jan Blunck22b26db2010-02-24 13:25:31 +0100476 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 return rc;
478 }
479
David Howellsbc98a422017-07-17 08:45:34 +0100480 if (sb_rdonly(sb) && !(*flags & MS_RDONLY)) {
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600481 /*
482 * Invalidate any previously read metadata. fsck may have
483 * changed the on-disk data since we mounted r/o
484 */
485 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 JFS_SBI(sb)->flag = flag;
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200488 ret = jfs_mount_rw(sb, 1);
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400489
490 /* mark the fs r/w for quota activity */
491 sb->s_flags &= ~MS_RDONLY;
492
Christoph Hellwig0f0dd622010-05-19 07:16:41 -0400493 dquot_resume(sb, -1);
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200494 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 }
David Howellsbc98a422017-07-17 08:45:34 +0100496 if (!sb_rdonly(sb) && (*flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -0400497 rc = dquot_suspend(sb, -1);
Fabian Frederick789602e2014-05-22 10:42:24 +1000498 if (rc < 0)
Christoph Hellwig0f0dd622010-05-19 07:16:41 -0400499 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 rc = jfs_umount_rw(sb);
501 JFS_SBI(sb)->flag = flag;
502 return rc;
503 }
504 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
David Howellsbc98a422017-07-17 08:45:34 +0100505 if (!sb_rdonly(sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 rc = jfs_umount_rw(sb);
Jan Blunck22b26db2010-02-24 13:25:31 +0100507 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 return rc;
Jan Blunck22b26db2010-02-24 13:25:31 +0100509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 JFS_SBI(sb)->flag = flag;
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200511 ret = jfs_mount_rw(sb, 1);
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200512 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 }
514 JFS_SBI(sb)->flag = flag;
515
516 return 0;
517}
518
519static int jfs_fill_super(struct super_block *sb, void *data, int silent)
520{
521 struct jfs_sb_info *sbi;
522 struct inode *inode;
523 int rc;
524 s64 newLVSize = 0;
David Howellseab1df72008-02-07 00:15:43 -0800525 int flag, ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
527 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
528
Fabian Frederick789602e2014-05-22 10:42:24 +1000529 sbi = kzalloc(sizeof(struct jfs_sb_info), GFP_KERNEL);
Jan Blunck22b26db2010-02-24 13:25:31 +0100530 if (!sbi)
Akinobu Mita087387f2006-09-14 09:22:38 -0500531 return -ENOMEM;
Jan Blunck22b26db2010-02-24 13:25:31 +0100532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 sb->s_fs_info = sbi;
Al Viro8de52772012-02-06 12:45:27 -0500534 sb->s_max_links = JFS_LINK_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 sbi->sb = sb;
Eric W. Biedermanc18cdc12012-02-10 11:40:34 -0800536 sbi->uid = INVALID_UID;
537 sbi->gid = INVALID_GID;
538 sbi->umask = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
540 /* initialize the mount flag and determine the default error handler */
541 flag = JFS_ERR_REMOUNT_RO;
542
Jan Blunck684bdc72010-04-12 16:44:08 -0700543 if (!parse_options((char *) data, sb, &newLVSize, &flag))
544 goto out_kfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 sbi->flag = flag;
546
547#ifdef CONFIG_JFS_POSIX_ACL
548 sb->s_flags |= MS_POSIXACL;
549#endif
550
551 if (newLVSize) {
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500552 pr_err("resize option for remount only\n");
Jan Blunck684bdc72010-04-12 16:44:08 -0700553 goto out_kfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 }
555
556 /*
557 * Initialize blocksize to 4K.
558 */
559 sb_set_blocksize(sb, PSIZE);
560
561 /*
562 * Set method vectors.
563 */
564 sb->s_op = &jfs_super_operations;
565 sb->s_export_op = &jfs_export_operations;
Christoph Hellwig2cc6a5a2013-12-20 05:16:51 -0800566 sb->s_xattr = jfs_xattr_handlers;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -0400567#ifdef CONFIG_QUOTA
568 sb->dq_op = &dquot_operations;
Jan Kara12fd0862017-04-11 16:21:01 +0200569 sb->s_qcop = &jfs_quotactl_ops;
Jan Kara507e1fa2014-10-01 11:19:12 +0200570 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -0400571#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600573 /*
574 * Initialize direct-mapping inode/address-space
575 */
576 inode = new_inode(sb);
David Howellseab1df72008-02-07 00:15:43 -0800577 if (inode == NULL) {
578 ret = -ENOMEM;
Jan Blunck684bdc72010-04-12 16:44:08 -0700579 goto out_unload;
David Howellseab1df72008-02-07 00:15:43 -0800580 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600581 inode->i_ino = 0;
Fabian Frederick684666e2017-01-23 18:50:23 +0100582 inode->i_size = i_size_read(sb->s_bdev->bd_inode);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600583 inode->i_mapping->a_ops = &jfs_metapage_aops;
Al Viro9bb87302014-09-02 23:53:04 -0400584 hlist_add_fake(&inode->i_hash);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600585 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
586
587 sbi->direct_inode = inode;
588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 rc = jfs_mount(sb);
590 if (rc) {
Fabian Frederick789602e2014-05-22 10:42:24 +1000591 if (!silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 jfs_err("jfs_mount failed w/return code = %d", rc);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600593 goto out_mount_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 }
David Howellsbc98a422017-07-17 08:45:34 +0100595 if (sb_rdonly(sb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 sbi->log = NULL;
597 else {
598 rc = jfs_mount_rw(sb, 0);
599 if (rc) {
600 if (!silent) {
601 jfs_err("jfs_mount_rw failed, return code = %d",
602 rc);
603 }
604 goto out_no_rw;
605 }
606 }
607
608 sb->s_magic = JFS_SUPER_MAGIC;
609
Al Viro94b77bd2010-12-18 10:59:31 -0500610 if (sbi->mntflag & JFS_OS2)
611 sb->s_d_op = &jfs_ci_dentry_operations;
612
David Howellseab1df72008-02-07 00:15:43 -0800613 inode = jfs_iget(sb, ROOT_I);
614 if (IS_ERR(inode)) {
615 ret = PTR_ERR(inode);
Dave Kleikamp6536d282008-05-21 10:45:16 -0500616 goto out_no_rw;
David Howellseab1df72008-02-07 00:15:43 -0800617 }
Al Viro48fde702012-01-08 22:15:13 -0500618 sb->s_root = d_make_root(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 if (!sb->s_root)
620 goto out_no_root;
621
Dave Kleikampc2273902017-08-31 16:46:59 -0500622 /* logical blocks are represented by 40 bits in pxd_t, etc.
623 * and page cache is indexed by long
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 */
Dave Kleikampc2273902017-08-31 16:46:59 -0500625 sb->s_maxbytes = min(((loff_t)sb->s_blocksize) << 40, MAX_LFS_FILESIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 sb->s_time_gran = 1;
627 return 0;
628
629out_no_root:
Dave Kleikamp6536d282008-05-21 10:45:16 -0500630 jfs_err("jfs_read_super: get root dentry failed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
632out_no_rw:
633 rc = jfs_umount(sb);
Fabian Frederick789602e2014-05-22 10:42:24 +1000634 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 jfs_err("jfs_umount failed with return code %d", rc);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600636out_mount_failed:
OGAWA Hirofumi28fd1292006-01-08 01:02:14 -0800637 filemap_write_and_wait(sbi->direct_inode->i_mapping);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600638 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
639 make_bad_inode(sbi->direct_inode);
640 iput(sbi->direct_inode);
641 sbi->direct_inode = NULL;
Jan Blunck684bdc72010-04-12 16:44:08 -0700642out_unload:
Markus Elfring648695c2015-02-01 17:00:24 +0100643 unload_nls(sbi->nls_tab);
Jan Blunck684bdc72010-04-12 16:44:08 -0700644out_kfree:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 kfree(sbi);
David Howellseab1df72008-02-07 00:15:43 -0800646 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647}
648
Takashi Satoc4be0c12009-01-09 16:40:58 -0800649static int jfs_freeze(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650{
651 struct jfs_sb_info *sbi = JFS_SBI(sb);
652 struct jfs_log *log = sbi->log;
Vahram Martirosyane9b37662013-05-24 13:57:12 +0500653 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
David Howellsbc98a422017-07-17 08:45:34 +0100655 if (!sb_rdonly(sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 txQuiesce(sb);
Vahram Martirosyane9b37662013-05-24 13:57:12 +0500657 rc = lmLogShutdown(log);
658 if (rc) {
Joe Percheseb8630d2013-06-04 16:39:15 -0700659 jfs_error(sb, "lmLogShutdown failed\n");
Vahram Martirosyane9b37662013-05-24 13:57:12 +0500660
661 /* let operations fail rather than hang */
662 txResume(sb);
663
664 return rc;
665 }
666 rc = updateSuper(sb, FM_CLEAN);
667 if (rc) {
Joe Perchesb18db6d2016-03-30 05:23:16 -0700668 jfs_err("jfs_freeze: updateSuper failed");
Vahram Martirosyane9b37662013-05-24 13:57:12 +0500669 /*
670 * Don't fail here. Everything succeeded except
671 * marking the superblock clean, so there's really
672 * no harm in leaving it frozen for now.
673 */
674 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 }
Takashi Satoc4be0c12009-01-09 16:40:58 -0800676 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677}
678
Takashi Satoc4be0c12009-01-09 16:40:58 -0800679static int jfs_unfreeze(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680{
681 struct jfs_sb_info *sbi = JFS_SBI(sb);
682 struct jfs_log *log = sbi->log;
683 int rc = 0;
684
David Howellsbc98a422017-07-17 08:45:34 +0100685 if (!sb_rdonly(sb)) {
Vahram Martirosyane9b37662013-05-24 13:57:12 +0500686 rc = updateSuper(sb, FM_MOUNT);
687 if (rc) {
Joe Percheseb8630d2013-06-04 16:39:15 -0700688 jfs_error(sb, "updateSuper failed\n");
Vahram Martirosyane9b37662013-05-24 13:57:12 +0500689 goto out;
690 }
691 rc = lmLogInit(log);
692 if (rc)
Joe Percheseb8630d2013-06-04 16:39:15 -0700693 jfs_error(sb, "lmLogInit failed\n");
Vahram Martirosyane9b37662013-05-24 13:57:12 +0500694out:
695 txResume(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 }
Vahram Martirosyane9b37662013-05-24 13:57:12 +0500697 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698}
699
Al Viro152a0832010-07-25 00:46:55 +0400700static struct dentry *jfs_do_mount(struct file_system_type *fs_type,
701 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702{
Al Viro152a0832010-07-25 00:46:55 +0400703 return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704}
705
706static int jfs_sync_fs(struct super_block *sb, int wait)
707{
708 struct jfs_log *log = JFS_SBI(sb)->log;
709
710 /* log == NULL indicates read-only mount */
Dave Kleikamp1c627822005-05-02 12:25:08 -0600711 if (log) {
Jan Karaa1177822012-07-03 16:45:29 +0200712 /*
713 * Write quota structures to quota file, sync_blockdev() will
714 * write them to disk later
715 */
716 dquot_writeback_dquots(sb, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 jfs_flush_journal(log, wait);
Dave Kleikampcbc3d652005-07-27 09:17:57 -0500718 jfs_syncpt(log, 0);
Dave Kleikamp1c627822005-05-02 12:25:08 -0600719 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
721 return 0;
722}
723
Al Viro34c80b12011-12-08 21:32:45 -0500724static int jfs_show_options(struct seq_file *seq, struct dentry *root)
Mark Bellon8fc27512005-09-06 15:16:54 -0700725{
Al Viro34c80b12011-12-08 21:32:45 -0500726 struct jfs_sb_info *sbi = JFS_SBI(root->d_sb);
Mark Bellon8fc27512005-09-06 15:16:54 -0700727
Eric W. Biedermanc18cdc12012-02-10 11:40:34 -0800728 if (uid_valid(sbi->uid))
729 seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid));
730 if (gid_valid(sbi->gid))
731 seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid));
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600732 if (sbi->umask != -1)
733 seq_printf(seq, ",umask=%03o", sbi->umask);
Mark Bellon8fc27512005-09-06 15:16:54 -0700734 if (sbi->flag & JFS_NOINTEGRITY)
735 seq_puts(seq, ",nointegrity");
Tino Reichardtb40c2e62012-09-17 11:58:19 -0500736 if (sbi->flag & JFS_DISCARD)
737 seq_printf(seq, ",discard=%u", sbi->minblks_trim);
Miklos Szeredi5c5e32c2008-01-24 16:13:21 -0600738 if (sbi->nls_tab)
739 seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset);
740 if (sbi->flag & JFS_ERR_CONTINUE)
741 seq_printf(seq, ",errors=continue");
742 if (sbi->flag & JFS_ERR_PANIC)
743 seq_printf(seq, ",errors=panic");
Mark Bellon8fc27512005-09-06 15:16:54 -0700744
Dave Kleikamp115ff502006-07-26 14:52:13 -0500745#ifdef CONFIG_QUOTA
Mark Bellon8fc27512005-09-06 15:16:54 -0700746 if (sbi->flag & JFS_USRQUOTA)
747 seq_puts(seq, ",usrquota");
748
749 if (sbi->flag & JFS_GRPQUOTA)
750 seq_puts(seq, ",grpquota");
751#endif
752
753 return 0;
754}
755
Dave Kleikamp115ff502006-07-26 14:52:13 -0500756#ifdef CONFIG_QUOTA
757
758/* Read data from quotafile - avoid pagecache and such because we cannot afford
759 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300760 * itself serializes the operations (and no one else should touch the files)
Dave Kleikamp115ff502006-07-26 14:52:13 -0500761 * we don't have to be afraid of races */
762static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
763 size_t len, loff_t off)
764{
765 struct inode *inode = sb_dqopt(sb)->files[type];
766 sector_t blk = off >> sb->s_blocksize_bits;
767 int err = 0;
768 int offset = off & (sb->s_blocksize - 1);
769 int tocopy;
770 size_t toread;
771 struct buffer_head tmp_bh;
772 struct buffer_head *bh;
773 loff_t i_size = i_size_read(inode);
774
775 if (off > i_size)
776 return 0;
777 if (off+len > i_size)
778 len = i_size-off;
779 toread = len;
780 while (toread > 0) {
781 tocopy = sb->s_blocksize - offset < toread ?
782 sb->s_blocksize - offset : toread;
783
784 tmp_bh.b_state = 0;
Fabian Frederick93407472017-02-27 14:28:32 -0800785 tmp_bh.b_size = i_blocksize(inode);
Dave Kleikamp115ff502006-07-26 14:52:13 -0500786 err = jfs_get_block(inode, blk, &tmp_bh, 0);
787 if (err)
788 return err;
789 if (!buffer_mapped(&tmp_bh)) /* A hole? */
790 memset(data, 0, tocopy);
791 else {
792 bh = sb_bread(sb, tmp_bh.b_blocknr);
793 if (!bh)
794 return -EIO;
795 memcpy(data, bh->b_data+offset, tocopy);
796 brelse(bh);
797 }
798 offset = 0;
799 toread -= tocopy;
800 data += tocopy;
801 blk++;
802 }
803 return len;
804}
805
806/* Write to quotafile */
807static ssize_t jfs_quota_write(struct super_block *sb, int type,
808 const char *data, size_t len, loff_t off)
809{
810 struct inode *inode = sb_dqopt(sb)->files[type];
811 sector_t blk = off >> sb->s_blocksize_bits;
812 int err = 0;
813 int offset = off & (sb->s_blocksize - 1);
814 int tocopy;
815 size_t towrite = len;
816 struct buffer_head tmp_bh;
817 struct buffer_head *bh;
818
Al Viro59551022016-01-22 15:40:57 -0500819 inode_lock(inode);
Dave Kleikamp115ff502006-07-26 14:52:13 -0500820 while (towrite > 0) {
821 tocopy = sb->s_blocksize - offset < towrite ?
822 sb->s_blocksize - offset : towrite;
823
824 tmp_bh.b_state = 0;
Fabian Frederick93407472017-02-27 14:28:32 -0800825 tmp_bh.b_size = i_blocksize(inode);
Dave Kleikamp115ff502006-07-26 14:52:13 -0500826 err = jfs_get_block(inode, blk, &tmp_bh, 1);
827 if (err)
828 goto out;
829 if (offset || tocopy != sb->s_blocksize)
830 bh = sb_bread(sb, tmp_bh.b_blocknr);
831 else
832 bh = sb_getblk(sb, tmp_bh.b_blocknr);
833 if (!bh) {
834 err = -EIO;
835 goto out;
836 }
837 lock_buffer(bh);
838 memcpy(bh->b_data+offset, data, tocopy);
839 flush_dcache_page(bh->b_page);
840 set_buffer_uptodate(bh);
841 mark_buffer_dirty(bh);
842 unlock_buffer(bh);
843 brelse(bh);
844 offset = 0;
845 towrite -= tocopy;
846 data += tocopy;
847 blk++;
848 }
849out:
Dan Carpenter9c836332009-04-07 14:48:16 +0300850 if (len == towrite) {
Al Viro59551022016-01-22 15:40:57 -0500851 inode_unlock(inode);
Dave Kleikamp115ff502006-07-26 14:52:13 -0500852 return err;
Dan Carpenter9c836332009-04-07 14:48:16 +0300853 }
Dave Kleikamp115ff502006-07-26 14:52:13 -0500854 if (inode->i_size < off+len-towrite)
855 i_size_write(inode, off+len-towrite);
Deepa Dinamani078cd822016-09-14 07:48:04 -0700856 inode->i_mtime = inode->i_ctime = current_time(inode);
Dave Kleikamp115ff502006-07-26 14:52:13 -0500857 mark_inode_dirty(inode);
Al Viro59551022016-01-22 15:40:57 -0500858 inode_unlock(inode);
Dave Kleikamp115ff502006-07-26 14:52:13 -0500859 return len - towrite;
860}
861
Jan Kara507e1fa2014-10-01 11:19:12 +0200862static struct dquot **jfs_get_dquots(struct inode *inode)
863{
864 return JFS_IP(inode)->i_dquot;
865}
Jan Kara12fd0862017-04-11 16:21:01 +0200866
867static int jfs_quota_on(struct super_block *sb, int type, int format_id,
868 const struct path *path)
869{
870 int err;
871 struct inode *inode;
872
873 err = dquot_quota_on(sb, type, format_id, path);
874 if (err)
875 return err;
876
877 inode = d_inode(path->dentry);
878 inode_lock(inode);
879 JFS_IP(inode)->mode2 |= JFS_NOATIME_FL | JFS_IMMUTABLE_FL;
880 inode_set_flags(inode, S_NOATIME | S_IMMUTABLE,
881 S_NOATIME | S_IMMUTABLE);
882 inode_unlock(inode);
883 mark_inode_dirty(inode);
884
885 return 0;
886}
887
888static int jfs_quota_off(struct super_block *sb, int type)
889{
890 struct inode *inode = sb_dqopt(sb)->files[type];
891 int err;
892
893 if (!inode || !igrab(inode))
894 goto out;
895
896 err = dquot_quota_off(sb, type);
897 if (err)
898 goto out_put;
899
900 inode_lock(inode);
901 JFS_IP(inode)->mode2 &= ~(JFS_NOATIME_FL | JFS_IMMUTABLE_FL);
902 inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE);
903 inode_unlock(inode);
904 mark_inode_dirty(inode);
905out_put:
906 iput(inode);
907 return err;
908out:
909 return dquot_quota_off(sb, type);
910}
Dave Kleikamp115ff502006-07-26 14:52:13 -0500911#endif
912
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800913static const struct super_operations jfs_super_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 .alloc_inode = jfs_alloc_inode,
915 .destroy_inode = jfs_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 .dirty_inode = jfs_dirty_inode,
917 .write_inode = jfs_write_inode,
Al Viro62aff862010-06-07 00:28:54 -0400918 .evict_inode = jfs_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 .put_super = jfs_put_super,
920 .sync_fs = jfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800921 .freeze_fs = jfs_freeze,
922 .unfreeze_fs = jfs_unfreeze,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 .statfs = jfs_statfs,
924 .remount_fs = jfs_remount,
Dave Kleikamp115ff502006-07-26 14:52:13 -0500925 .show_options = jfs_show_options,
926#ifdef CONFIG_QUOTA
927 .quota_read = jfs_quota_read,
928 .quota_write = jfs_quota_write,
Jan Kara507e1fa2014-10-01 11:19:12 +0200929 .get_dquots = jfs_get_dquots,
Dave Kleikamp115ff502006-07-26 14:52:13 -0500930#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931};
932
Christoph Hellwig39655162007-10-21 16:42:17 -0700933static const struct export_operations jfs_export_operations = {
Christoph Hellwigd425de72007-10-21 16:42:09 -0700934 .fh_to_dentry = jfs_fh_to_dentry,
935 .fh_to_parent = jfs_fh_to_parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 .get_parent = jfs_get_parent,
937};
938
939static struct file_system_type jfs_fs_type = {
940 .owner = THIS_MODULE,
941 .name = "jfs",
Al Viro152a0832010-07-25 00:46:55 +0400942 .mount = jfs_do_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 .kill_sb = kill_block_super,
944 .fs_flags = FS_REQUIRES_DEV,
945};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800946MODULE_ALIAS_FS("jfs");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700948static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949{
950 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
951
Christoph Lametera35afb82007-05-16 22:10:57 -0700952 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
953 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
954 init_rwsem(&jfs_ip->rdwrlock);
955 mutex_init(&jfs_ip->commit_mutex);
956 init_rwsem(&jfs_ip->xattr_sem);
957 spin_lock_init(&jfs_ip->ag_lock);
958 jfs_ip->active_ag = -1;
Christoph Lametera35afb82007-05-16 22:10:57 -0700959 inode_init_once(&jfs_ip->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960}
961
962static int __init init_jfs_fs(void)
963{
964 int i;
965 int rc;
966
967 jfs_inode_cachep =
Dave Kleikamp63f83c92006-10-02 09:55:27 -0500968 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
Vladimir Davydov5d097052016-01-14 15:18:21 -0800969 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|SLAB_ACCOUNT,
Paul Mundt20c2df82007-07-20 10:11:58 +0900970 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 if (jfs_inode_cachep == NULL)
972 return -ENOMEM;
973
974 /*
975 * Metapage initialization
976 */
977 rc = metapage_init();
978 if (rc) {
979 jfs_err("metapage_init failed w/rc = %d", rc);
980 goto free_slab;
981 }
982
983 /*
984 * Transaction Manager initialization
985 */
986 rc = txInit();
987 if (rc) {
988 jfs_err("txInit failed w/rc = %d", rc);
989 goto free_metapage;
990 }
991
992 /*
993 * I/O completion thread (endio)
994 */
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600995 jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
996 if (IS_ERR(jfsIOthread)) {
997 rc = PTR_ERR(jfsIOthread);
998 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 goto end_txmngr;
1000 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001
1002 if (commit_threads < 1)
1003 commit_threads = num_online_cpus();
1004 if (commit_threads > MAX_COMMIT_THREADS)
1005 commit_threads = MAX_COMMIT_THREADS;
1006
1007 for (i = 0; i < commit_threads; i++) {
Fabian Frederick789602e2014-05-22 10:42:24 +10001008 jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL,
1009 "jfsCommit");
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06001010 if (IS_ERR(jfsCommitThread[i])) {
1011 rc = PTR_ERR(jfsCommitThread[i]);
1012 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 commit_threads = i;
1014 goto kill_committask;
1015 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 }
1017
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06001018 jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
1019 if (IS_ERR(jfsSyncThread)) {
1020 rc = PTR_ERR(jfsSyncThread);
1021 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 goto kill_committask;
1023 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024
1025#ifdef PROC_FS_JFS
1026 jfs_proc_init();
1027#endif
1028
Al Viro76bf09f2012-03-17 18:14:34 -04001029 rc = register_filesystem(&jfs_fs_type);
1030 if (!rc)
1031 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032
Al Viro76bf09f2012-03-17 18:14:34 -04001033#ifdef PROC_FS_JFS
1034 jfs_proc_clean();
1035#endif
1036 kthread_stop(jfsSyncThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037kill_committask:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 for (i = 0; i < commit_threads; i++)
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06001039 kthread_stop(jfsCommitThread[i]);
1040 kthread_stop(jfsIOthread);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041end_txmngr:
1042 txExit();
1043free_metapage:
1044 metapage_exit();
1045free_slab:
1046 kmem_cache_destroy(jfs_inode_cachep);
1047 return rc;
1048}
1049
1050static void __exit exit_jfs_fs(void)
1051{
1052 int i;
1053
1054 jfs_info("exit_jfs_fs called");
1055
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 txExit();
1057 metapage_exit();
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06001058
1059 kthread_stop(jfsIOthread);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 for (i = 0; i < commit_threads; i++)
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06001061 kthread_stop(jfsCommitThread[i]);
1062 kthread_stop(jfsSyncThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063#ifdef PROC_FS_JFS
1064 jfs_proc_clean();
1065#endif
1066 unregister_filesystem(&jfs_fs_type);
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +10001067
1068 /*
1069 * Make sure all delayed rcu free inodes are flushed before we
1070 * destroy cache.
1071 */
1072 rcu_barrier();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 kmem_cache_destroy(jfs_inode_cachep);
1074}
1075
1076module_init(init_jfs_fs)
1077module_exit(exit_jfs_fs)