blob: 8d31f1336431a916e7947f0381ec439d61705bbb [file] [log] [blame]
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
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * 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
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/fs.h>
21#include <linux/config.h>
22#include <linux/module.h>
23#include <linux/parser.h>
24#include <linux/completion.h>
25#include <linux/vfs.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 Hellwig9a59f452005-06-23 00:10:19 -070028#include <linux/posix_acl.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <asm/uaccess.h>
Mark Bellon8fc27512005-09-06 15:16:54 -070030#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32#include "jfs_incore.h"
33#include "jfs_filsys.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050034#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "jfs_metapage.h"
36#include "jfs_superblock.h"
37#include "jfs_dmap.h"
38#include "jfs_imap.h"
39#include "jfs_acl.h"
40#include "jfs_debug.h"
41
42MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
43MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
44MODULE_LICENSE("GPL");
45
46static kmem_cache_t * jfs_inode_cachep;
47
48static struct super_operations jfs_super_operations;
49static struct export_operations jfs_export_operations;
50static struct file_system_type jfs_fs_type;
51
52#define MAX_COMMIT_THREADS 64
53static int commit_threads = 0;
54module_param(commit_threads, int, 0);
55MODULE_PARM_DESC(commit_threads, "Number of commit threads");
56
57int jfs_stop_threads;
58static pid_t jfsIOthread;
59static pid_t jfsCommitThread[MAX_COMMIT_THREADS];
60static pid_t jfsSyncThread;
61DECLARE_COMPLETION(jfsIOwait);
62
63#ifdef CONFIG_JFS_DEBUG
64int jfsloglevel = JFS_LOGLEVEL_WARN;
65module_param(jfsloglevel, int, 0644);
66MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
67#endif
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069static void jfs_handle_error(struct super_block *sb)
70{
71 struct jfs_sb_info *sbi = JFS_SBI(sb);
72
73 if (sb->s_flags & MS_RDONLY)
74 return;
75
76 updateSuper(sb, FM_DIRTY);
77
78 if (sbi->flag & JFS_ERR_PANIC)
79 panic("JFS (device %s): panic forced after error\n",
80 sb->s_id);
81 else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
82 jfs_err("ERROR: (device %s): remounting filesystem "
83 "as read-only\n",
84 sb->s_id);
85 sb->s_flags |= MS_RDONLY;
86 }
87
88 /* nothing is done for continue beyond marking the superblock dirty */
89}
90
91void jfs_error(struct super_block *sb, const char * function, ...)
92{
93 static char error_buf[256];
94 va_list args;
95
96 va_start(args, function);
97 vsprintf(error_buf, function, args);
98 va_end(args);
99
100 printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
101
102 jfs_handle_error(sb);
103}
104
105static struct inode *jfs_alloc_inode(struct super_block *sb)
106{
107 struct jfs_inode_info *jfs_inode;
108
109 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
110 if (!jfs_inode)
111 return NULL;
112 return &jfs_inode->vfs_inode;
113}
114
115static void jfs_destroy_inode(struct inode *inode)
116{
117 struct jfs_inode_info *ji = JFS_IP(inode);
118
Dave Kleikamp8a9cd6d2005-08-10 11:14:39 -0500119 BUG_ON(!list_empty(&ji->anon_inode_list));
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 spin_lock_irq(&ji->ag_lock);
122 if (ji->active_ag != -1) {
123 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
124 atomic_dec(&bmap->db_active[ji->active_ag]);
125 ji->active_ag = -1;
126 }
127 spin_unlock_irq(&ji->ag_lock);
128
129#ifdef CONFIG_JFS_POSIX_ACL
130 if (ji->i_acl != JFS_ACL_NOT_CACHED) {
131 posix_acl_release(ji->i_acl);
132 ji->i_acl = JFS_ACL_NOT_CACHED;
133 }
134 if (ji->i_default_acl != JFS_ACL_NOT_CACHED) {
135 posix_acl_release(ji->i_default_acl);
136 ji->i_default_acl = JFS_ACL_NOT_CACHED;
137 }
138#endif
139
140 kmem_cache_free(jfs_inode_cachep, ji);
141}
142
143static int jfs_statfs(struct super_block *sb, struct kstatfs *buf)
144{
145 struct jfs_sb_info *sbi = JFS_SBI(sb);
146 s64 maxinodes;
147 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
148
149 jfs_info("In jfs_statfs");
150 buf->f_type = JFS_SUPER_MAGIC;
151 buf->f_bsize = sbi->bsize;
152 buf->f_blocks = sbi->bmap->db_mapsize;
153 buf->f_bfree = sbi->bmap->db_nfree;
154 buf->f_bavail = sbi->bmap->db_nfree;
155 /*
156 * If we really return the number of allocated & free inodes, some
157 * applications will fail because they won't see enough free inodes.
158 * We'll try to calculate some guess as to how may inodes we can
159 * really allocate
160 *
161 * buf->f_files = atomic_read(&imap->im_numinos);
162 * buf->f_ffree = atomic_read(&imap->im_numfree);
163 */
164 maxinodes = min((s64) atomic_read(&imap->im_numinos) +
165 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
166 << L2INOSPEREXT), (s64) 0xffffffffLL);
167 buf->f_files = maxinodes;
168 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
169 atomic_read(&imap->im_numfree));
170
171 buf->f_namelen = JFS_NAME_MAX;
172 return 0;
173}
174
175static void jfs_put_super(struct super_block *sb)
176{
177 struct jfs_sb_info *sbi = JFS_SBI(sb);
178 int rc;
179
180 jfs_info("In jfs_put_super");
181 rc = jfs_umount(sb);
182 if (rc)
183 jfs_err("jfs_umount failed with return code %d", rc);
184 if (sbi->nls_tab)
185 unload_nls(sbi->nls_tab);
186 sbi->nls_tab = NULL;
187
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600188 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
189 iput(sbi->direct_inode);
190 sbi->direct_inode = NULL;
191
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 kfree(sbi);
193}
194
195enum {
196 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
Mark Bellon8fc27512005-09-06 15:16:54 -0700197 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
198 Opt_usrquota, Opt_grpquota
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199};
200
201static match_table_t tokens = {
202 {Opt_integrity, "integrity"},
203 {Opt_nointegrity, "nointegrity"},
204 {Opt_iocharset, "iocharset=%s"},
205 {Opt_resize, "resize=%u"},
206 {Opt_resize_nosize, "resize"},
207 {Opt_errors, "errors=%s"},
208 {Opt_ignore, "noquota"},
209 {Opt_ignore, "quota"},
Mark Bellon8fc27512005-09-06 15:16:54 -0700210 {Opt_usrquota, "usrquota"},
211 {Opt_grpquota, "grpquota"},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 {Opt_err, NULL}
213};
214
215static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
216 int *flag)
217{
218 void *nls_map = (void *)-1; /* -1: no change; NULL: none */
219 char *p;
220 struct jfs_sb_info *sbi = JFS_SBI(sb);
221
222 *newLVSize = 0;
223
224 if (!options)
225 return 1;
226
227 while ((p = strsep(&options, ",")) != NULL) {
228 substring_t args[MAX_OPT_ARGS];
229 int token;
230 if (!*p)
231 continue;
232
233 token = match_token(p, tokens, args);
234 switch (token) {
235 case Opt_integrity:
236 *flag &= ~JFS_NOINTEGRITY;
237 break;
238 case Opt_nointegrity:
239 *flag |= JFS_NOINTEGRITY;
240 break;
241 case Opt_ignore:
242 /* Silently ignore the quota options */
243 /* Don't do anything ;-) */
244 break;
245 case Opt_iocharset:
246 if (nls_map && nls_map != (void *) -1)
247 unload_nls(nls_map);
248 if (!strcmp(args[0].from, "none"))
249 nls_map = NULL;
250 else {
251 nls_map = load_nls(args[0].from);
252 if (!nls_map) {
253 printk(KERN_ERR
254 "JFS: charset not found\n");
255 goto cleanup;
256 }
257 }
258 break;
259 case Opt_resize:
260 {
261 char *resize = args[0].from;
262 *newLVSize = simple_strtoull(resize, &resize, 0);
263 break;
264 }
265 case Opt_resize_nosize:
266 {
267 *newLVSize = sb->s_bdev->bd_inode->i_size >>
268 sb->s_blocksize_bits;
269 if (*newLVSize == 0)
270 printk(KERN_ERR
271 "JFS: Cannot determine volume size\n");
272 break;
273 }
274 case Opt_errors:
275 {
276 char *errors = args[0].from;
277 if (!errors || !*errors)
278 goto cleanup;
279 if (!strcmp(errors, "continue")) {
280 *flag &= ~JFS_ERR_REMOUNT_RO;
281 *flag &= ~JFS_ERR_PANIC;
282 *flag |= JFS_ERR_CONTINUE;
283 } else if (!strcmp(errors, "remount-ro")) {
284 *flag &= ~JFS_ERR_CONTINUE;
285 *flag &= ~JFS_ERR_PANIC;
286 *flag |= JFS_ERR_REMOUNT_RO;
287 } else if (!strcmp(errors, "panic")) {
288 *flag &= ~JFS_ERR_CONTINUE;
289 *flag &= ~JFS_ERR_REMOUNT_RO;
290 *flag |= JFS_ERR_PANIC;
291 } else {
292 printk(KERN_ERR
293 "JFS: %s is an invalid error handler\n",
294 errors);
295 goto cleanup;
296 }
297 break;
298 }
Mark Bellon8fc27512005-09-06 15:16:54 -0700299
300#if defined(CONFIG_QUOTA)
301 case Opt_quota:
302 case Opt_usrquota:
303 *flag |= JFS_USRQUOTA;
304 break;
305 case Opt_grpquota:
306 *flag |= JFS_GRPQUOTA;
307 break;
308#else
309 case Opt_usrquota:
310 case Opt_grpquota:
311 case Opt_quota:
312 printk(KERN_ERR
313 "JFS: quota operations not supported\n");
314 break;
315#endif
316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 default:
318 printk("jfs: Unrecognized mount option \"%s\" "
319 " or missing value\n", p);
320 goto cleanup;
321 }
322 }
323
324 if (nls_map != (void *) -1) {
325 /* Discard old (if remount) */
326 if (sbi->nls_tab)
327 unload_nls(sbi->nls_tab);
328 sbi->nls_tab = nls_map;
329 }
330 return 1;
331
332cleanup:
333 if (nls_map && nls_map != (void *) -1)
334 unload_nls(nls_map);
335 return 0;
336}
337
338static int jfs_remount(struct super_block *sb, int *flags, char *data)
339{
340 s64 newLVSize = 0;
341 int rc = 0;
342 int flag = JFS_SBI(sb)->flag;
343
344 if (!parse_options(data, sb, &newLVSize, &flag)) {
345 return -EINVAL;
346 }
347 if (newLVSize) {
348 if (sb->s_flags & MS_RDONLY) {
349 printk(KERN_ERR
350 "JFS: resize requires volume to be mounted read-write\n");
351 return -EROFS;
352 }
353 rc = jfs_extendfs(sb, newLVSize, 0);
354 if (rc)
355 return rc;
356 }
357
358 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600359 /*
360 * Invalidate any previously read metadata. fsck may have
361 * changed the on-disk data since we mounted r/o
362 */
363 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
364
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 JFS_SBI(sb)->flag = flag;
366 return jfs_mount_rw(sb, 1);
367 }
368 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
369 rc = jfs_umount_rw(sb);
370 JFS_SBI(sb)->flag = flag;
371 return rc;
372 }
373 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
374 if (!(sb->s_flags & MS_RDONLY)) {
375 rc = jfs_umount_rw(sb);
376 if (rc)
377 return rc;
378 JFS_SBI(sb)->flag = flag;
379 return jfs_mount_rw(sb, 1);
380 }
381 JFS_SBI(sb)->flag = flag;
382
383 return 0;
384}
385
386static int jfs_fill_super(struct super_block *sb, void *data, int silent)
387{
388 struct jfs_sb_info *sbi;
389 struct inode *inode;
390 int rc;
391 s64 newLVSize = 0;
392 int flag;
393
394 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
395
396 if (!new_valid_dev(sb->s_bdev->bd_dev))
397 return -EOVERFLOW;
398
399 sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
400 if (!sbi)
401 return -ENOSPC;
402 memset(sbi, 0, sizeof (struct jfs_sb_info));
403 sb->s_fs_info = sbi;
404 sbi->sb = sb;
405
406 /* initialize the mount flag and determine the default error handler */
407 flag = JFS_ERR_REMOUNT_RO;
408
409 if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
410 kfree(sbi);
411 return -EINVAL;
412 }
413 sbi->flag = flag;
414
415#ifdef CONFIG_JFS_POSIX_ACL
416 sb->s_flags |= MS_POSIXACL;
417#endif
418
419 if (newLVSize) {
420 printk(KERN_ERR "resize option for remount only\n");
421 return -EINVAL;
422 }
423
424 /*
425 * Initialize blocksize to 4K.
426 */
427 sb_set_blocksize(sb, PSIZE);
428
429 /*
430 * Set method vectors.
431 */
432 sb->s_op = &jfs_super_operations;
433 sb->s_export_op = &jfs_export_operations;
434
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600435 /*
436 * Initialize direct-mapping inode/address-space
437 */
438 inode = new_inode(sb);
439 if (inode == NULL)
440 goto out_kfree;
441 inode->i_ino = 0;
442 inode->i_nlink = 1;
443 inode->i_size = sb->s_bdev->bd_inode->i_size;
444 inode->i_mapping->a_ops = &jfs_metapage_aops;
Dave Kleikampac17b8b2005-10-03 15:32:11 -0500445 insert_inode_hash(inode);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600446 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
447
448 sbi->direct_inode = inode;
449
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 rc = jfs_mount(sb);
451 if (rc) {
452 if (!silent) {
453 jfs_err("jfs_mount failed w/return code = %d", rc);
454 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600455 goto out_mount_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 }
457 if (sb->s_flags & MS_RDONLY)
458 sbi->log = NULL;
459 else {
460 rc = jfs_mount_rw(sb, 0);
461 if (rc) {
462 if (!silent) {
463 jfs_err("jfs_mount_rw failed, return code = %d",
464 rc);
465 }
466 goto out_no_rw;
467 }
468 }
469
470 sb->s_magic = JFS_SUPER_MAGIC;
471
472 inode = iget(sb, ROOT_I);
473 if (!inode || is_bad_inode(inode))
474 goto out_no_root;
475 sb->s_root = d_alloc_root(inode);
476 if (!sb->s_root)
477 goto out_no_root;
478
479 if (sbi->mntflag & JFS_OS2)
480 sb->s_root->d_op = &jfs_ci_dentry_operations;
481
482 /* logical blocks are represented by 40 bits in pxd_t, etc. */
483 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
484#if BITS_PER_LONG == 32
485 /*
486 * Page cache is indexed by long.
487 * I would use MAX_LFS_FILESIZE, but it's only half as big
488 */
489 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
490#endif
491 sb->s_time_gran = 1;
492 return 0;
493
494out_no_root:
495 jfs_err("jfs_read_super: get root inode failed");
496 if (inode)
497 iput(inode);
498
499out_no_rw:
500 rc = jfs_umount(sb);
501 if (rc) {
502 jfs_err("jfs_umount failed with return code %d", rc);
503 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600504out_mount_failed:
OGAWA Hirofumi28fd1292006-01-08 01:02:14 -0800505 filemap_write_and_wait(sbi->direct_inode->i_mapping);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600506 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
507 make_bad_inode(sbi->direct_inode);
508 iput(sbi->direct_inode);
509 sbi->direct_inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510out_kfree:
511 if (sbi->nls_tab)
512 unload_nls(sbi->nls_tab);
513 kfree(sbi);
514 return -EINVAL;
515}
516
517static void jfs_write_super_lockfs(struct super_block *sb)
518{
519 struct jfs_sb_info *sbi = JFS_SBI(sb);
520 struct jfs_log *log = sbi->log;
521
522 if (!(sb->s_flags & MS_RDONLY)) {
523 txQuiesce(sb);
524 lmLogShutdown(log);
525 updateSuper(sb, FM_CLEAN);
526 }
527}
528
529static void jfs_unlockfs(struct super_block *sb)
530{
531 struct jfs_sb_info *sbi = JFS_SBI(sb);
532 struct jfs_log *log = sbi->log;
533 int rc = 0;
534
535 if (!(sb->s_flags & MS_RDONLY)) {
536 updateSuper(sb, FM_MOUNT);
537 if ((rc = lmLogInit(log)))
538 jfs_err("jfs_unlock failed with return code %d", rc);
539 else
540 txResume(sb);
541 }
542}
543
544static struct super_block *jfs_get_sb(struct file_system_type *fs_type,
545 int flags, const char *dev_name, void *data)
546{
547 return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
548}
549
550static int jfs_sync_fs(struct super_block *sb, int wait)
551{
552 struct jfs_log *log = JFS_SBI(sb)->log;
553
554 /* log == NULL indicates read-only mount */
Dave Kleikamp1c627822005-05-02 12:25:08 -0600555 if (log) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 jfs_flush_journal(log, wait);
Dave Kleikampcbc3d652005-07-27 09:17:57 -0500557 jfs_syncpt(log, 0);
Dave Kleikamp1c627822005-05-02 12:25:08 -0600558 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
560 return 0;
561}
562
Mark Bellon8fc27512005-09-06 15:16:54 -0700563static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
564{
565 struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb);
566
567 if (sbi->flag & JFS_NOINTEGRITY)
568 seq_puts(seq, ",nointegrity");
569 else
570 seq_puts(seq, ",integrity");
571
572#if defined(CONFIG_QUOTA)
573 if (sbi->flag & JFS_USRQUOTA)
574 seq_puts(seq, ",usrquota");
575
576 if (sbi->flag & JFS_GRPQUOTA)
577 seq_puts(seq, ",grpquota");
578#endif
579
580 return 0;
581}
582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583static struct super_operations jfs_super_operations = {
584 .alloc_inode = jfs_alloc_inode,
585 .destroy_inode = jfs_destroy_inode,
586 .read_inode = jfs_read_inode,
587 .dirty_inode = jfs_dirty_inode,
588 .write_inode = jfs_write_inode,
589 .delete_inode = jfs_delete_inode,
590 .put_super = jfs_put_super,
591 .sync_fs = jfs_sync_fs,
592 .write_super_lockfs = jfs_write_super_lockfs,
593 .unlockfs = jfs_unlockfs,
594 .statfs = jfs_statfs,
595 .remount_fs = jfs_remount,
Mark Bellon8fc27512005-09-06 15:16:54 -0700596 .show_options = jfs_show_options
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597};
598
599static struct export_operations jfs_export_operations = {
600 .get_parent = jfs_get_parent,
601};
602
603static struct file_system_type jfs_fs_type = {
604 .owner = THIS_MODULE,
605 .name = "jfs",
606 .get_sb = jfs_get_sb,
607 .kill_sb = kill_block_super,
608 .fs_flags = FS_REQUIRES_DEV,
609};
610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
612{
613 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
614
615 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
616 SLAB_CTOR_CONSTRUCTOR) {
617 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
618 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
619 init_rwsem(&jfs_ip->rdwrlock);
620 init_MUTEX(&jfs_ip->commit_sem);
621 init_rwsem(&jfs_ip->xattr_sem);
622 spin_lock_init(&jfs_ip->ag_lock);
623 jfs_ip->active_ag = -1;
624#ifdef CONFIG_JFS_POSIX_ACL
625 jfs_ip->i_acl = JFS_ACL_NOT_CACHED;
626 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED;
627#endif
628 inode_init_once(&jfs_ip->vfs_inode);
629 }
630}
631
632static int __init init_jfs_fs(void)
633{
634 int i;
635 int rc;
636
637 jfs_inode_cachep =
638 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
639 SLAB_RECLAIM_ACCOUNT, init_once, NULL);
640 if (jfs_inode_cachep == NULL)
641 return -ENOMEM;
642
643 /*
644 * Metapage initialization
645 */
646 rc = metapage_init();
647 if (rc) {
648 jfs_err("metapage_init failed w/rc = %d", rc);
649 goto free_slab;
650 }
651
652 /*
653 * Transaction Manager initialization
654 */
655 rc = txInit();
656 if (rc) {
657 jfs_err("txInit failed w/rc = %d", rc);
658 goto free_metapage;
659 }
660
661 /*
662 * I/O completion thread (endio)
663 */
664 jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL);
665 if (jfsIOthread < 0) {
666 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread);
667 goto end_txmngr;
668 }
669 wait_for_completion(&jfsIOwait); /* Wait until thread starts */
670
671 if (commit_threads < 1)
672 commit_threads = num_online_cpus();
673 if (commit_threads > MAX_COMMIT_THREADS)
674 commit_threads = MAX_COMMIT_THREADS;
675
676 for (i = 0; i < commit_threads; i++) {
677 jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL,
678 CLONE_KERNEL);
679 if (jfsCommitThread[i] < 0) {
680 jfs_err("init_jfs_fs: fork failed w/rc = %d",
681 jfsCommitThread[i]);
682 commit_threads = i;
683 goto kill_committask;
684 }
685 /* Wait until thread starts */
686 wait_for_completion(&jfsIOwait);
687 }
688
689 jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL);
690 if (jfsSyncThread < 0) {
691 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread);
692 goto kill_committask;
693 }
694 wait_for_completion(&jfsIOwait); /* Wait until thread starts */
695
696#ifdef PROC_FS_JFS
697 jfs_proc_init();
698#endif
699
700 return register_filesystem(&jfs_fs_type);
701
702kill_committask:
703 jfs_stop_threads = 1;
704 wake_up_all(&jfs_commit_thread_wait);
705 for (i = 0; i < commit_threads; i++)
706 wait_for_completion(&jfsIOwait);
707
708 wake_up(&jfs_IO_thread_wait);
709 wait_for_completion(&jfsIOwait); /* Wait for thread exit */
710end_txmngr:
711 txExit();
712free_metapage:
713 metapage_exit();
714free_slab:
715 kmem_cache_destroy(jfs_inode_cachep);
716 return rc;
717}
718
719static void __exit exit_jfs_fs(void)
720{
721 int i;
722
723 jfs_info("exit_jfs_fs called");
724
725 jfs_stop_threads = 1;
726 txExit();
727 metapage_exit();
728 wake_up(&jfs_IO_thread_wait);
729 wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */
730 wake_up_all(&jfs_commit_thread_wait);
731 for (i = 0; i < commit_threads; i++)
732 wait_for_completion(&jfsIOwait);
733 wake_up(&jfs_sync_thread_wait);
734 wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */
735#ifdef PROC_FS_JFS
736 jfs_proc_clean();
737#endif
738 unregister_filesystem(&jfs_fs_type);
739 kmem_cache_destroy(jfs_inode_cachep);
740}
741
742module_init(init_jfs_fs)
743module_exit(exit_jfs_fs)