Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/module.h> |
| 22 | #include <linux/parser.h> |
| 23 | #include <linux/completion.h> |
| 24 | #include <linux/vfs.h> |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 25 | #include <linux/mount.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/moduleparam.h> |
Christoph Hellwig | 91dbb4d | 2006-02-15 12:49:04 -0600 | [diff] [blame] | 27 | #include <linux/kthread.h> |
Christoph Hellwig | 9a59f45 | 2005-06-23 00:10:19 -0700 | [diff] [blame] | 28 | #include <linux/posix_acl.h> |
Dave Kleikamp | 115ff50 | 2006-07-26 14:52:13 -0500 | [diff] [blame] | 29 | #include <linux/buffer_head.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/uaccess.h> |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 31 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | #include "jfs_incore.h" |
| 34 | #include "jfs_filsys.h" |
Dave Kleikamp | 1868f4a | 2005-05-04 15:29:35 -0500 | [diff] [blame] | 35 | #include "jfs_inode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "jfs_metapage.h" |
| 37 | #include "jfs_superblock.h" |
| 38 | #include "jfs_dmap.h" |
| 39 | #include "jfs_imap.h" |
| 40 | #include "jfs_acl.h" |
| 41 | #include "jfs_debug.h" |
| 42 | |
| 43 | MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); |
| 44 | MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); |
| 45 | MODULE_LICENSE("GPL"); |
| 46 | |
| 47 | static kmem_cache_t * jfs_inode_cachep; |
| 48 | |
| 49 | static struct super_operations jfs_super_operations; |
| 50 | static struct export_operations jfs_export_operations; |
| 51 | static struct file_system_type jfs_fs_type; |
| 52 | |
| 53 | #define MAX_COMMIT_THREADS 64 |
| 54 | static int commit_threads = 0; |
| 55 | module_param(commit_threads, int, 0); |
| 56 | MODULE_PARM_DESC(commit_threads, "Number of commit threads"); |
| 57 | |
Christoph Hellwig | 91dbb4d | 2006-02-15 12:49:04 -0600 | [diff] [blame] | 58 | static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; |
| 59 | struct task_struct *jfsIOthread; |
| 60 | struct task_struct *jfsSyncThread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | #ifdef CONFIG_JFS_DEBUG |
| 63 | int jfsloglevel = JFS_LOGLEVEL_WARN; |
| 64 | module_param(jfsloglevel, int, 0644); |
| 65 | MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); |
| 66 | #endif |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static void jfs_handle_error(struct super_block *sb) |
| 69 | { |
| 70 | struct jfs_sb_info *sbi = JFS_SBI(sb); |
| 71 | |
| 72 | if (sb->s_flags & MS_RDONLY) |
| 73 | return; |
| 74 | |
| 75 | updateSuper(sb, FM_DIRTY); |
| 76 | |
| 77 | if (sbi->flag & JFS_ERR_PANIC) |
| 78 | panic("JFS (device %s): panic forced after error\n", |
| 79 | sb->s_id); |
| 80 | else if (sbi->flag & JFS_ERR_REMOUNT_RO) { |
| 81 | jfs_err("ERROR: (device %s): remounting filesystem " |
| 82 | "as read-only\n", |
| 83 | sb->s_id); |
| 84 | sb->s_flags |= MS_RDONLY; |
| 85 | } |
| 86 | |
| 87 | /* nothing is done for continue beyond marking the superblock dirty */ |
| 88 | } |
| 89 | |
| 90 | void jfs_error(struct super_block *sb, const char * function, ...) |
| 91 | { |
| 92 | static char error_buf[256]; |
| 93 | va_list args; |
| 94 | |
| 95 | va_start(args, function); |
| 96 | vsprintf(error_buf, function, args); |
| 97 | va_end(args); |
| 98 | |
| 99 | printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf); |
| 100 | |
| 101 | jfs_handle_error(sb); |
| 102 | } |
| 103 | |
| 104 | static struct inode *jfs_alloc_inode(struct super_block *sb) |
| 105 | { |
| 106 | struct jfs_inode_info *jfs_inode; |
| 107 | |
| 108 | jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); |
| 109 | if (!jfs_inode) |
| 110 | return NULL; |
| 111 | return &jfs_inode->vfs_inode; |
| 112 | } |
| 113 | |
| 114 | static void jfs_destroy_inode(struct inode *inode) |
| 115 | { |
| 116 | struct jfs_inode_info *ji = JFS_IP(inode); |
| 117 | |
Dave Kleikamp | 8a9cd6d | 2005-08-10 11:14:39 -0500 | [diff] [blame] | 118 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
| 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | spin_lock_irq(&ji->ag_lock); |
| 121 | if (ji->active_ag != -1) { |
| 122 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; |
| 123 | atomic_dec(&bmap->db_active[ji->active_ag]); |
| 124 | ji->active_ag = -1; |
| 125 | } |
| 126 | spin_unlock_irq(&ji->ag_lock); |
| 127 | |
| 128 | #ifdef CONFIG_JFS_POSIX_ACL |
| 129 | if (ji->i_acl != JFS_ACL_NOT_CACHED) { |
| 130 | posix_acl_release(ji->i_acl); |
| 131 | ji->i_acl = JFS_ACL_NOT_CACHED; |
| 132 | } |
| 133 | if (ji->i_default_acl != JFS_ACL_NOT_CACHED) { |
| 134 | posix_acl_release(ji->i_default_acl); |
| 135 | ji->i_default_acl = JFS_ACL_NOT_CACHED; |
| 136 | } |
| 137 | #endif |
| 138 | |
| 139 | kmem_cache_free(jfs_inode_cachep, ji); |
| 140 | } |
| 141 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 142 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 144 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | s64 maxinodes; |
| 146 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; |
| 147 | |
| 148 | jfs_info("In jfs_statfs"); |
| 149 | buf->f_type = JFS_SUPER_MAGIC; |
| 150 | buf->f_bsize = sbi->bsize; |
| 151 | buf->f_blocks = sbi->bmap->db_mapsize; |
| 152 | buf->f_bfree = sbi->bmap->db_nfree; |
| 153 | buf->f_bavail = sbi->bmap->db_nfree; |
| 154 | /* |
| 155 | * If we really return the number of allocated & free inodes, some |
| 156 | * applications will fail because they won't see enough free inodes. |
| 157 | * We'll try to calculate some guess as to how may inodes we can |
| 158 | * really allocate |
| 159 | * |
| 160 | * buf->f_files = atomic_read(&imap->im_numinos); |
| 161 | * buf->f_ffree = atomic_read(&imap->im_numfree); |
| 162 | */ |
| 163 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + |
| 164 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) |
| 165 | << L2INOSPEREXT), (s64) 0xffffffffLL); |
| 166 | buf->f_files = maxinodes; |
| 167 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - |
| 168 | atomic_read(&imap->im_numfree)); |
| 169 | |
| 170 | buf->f_namelen = JFS_NAME_MAX; |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static void jfs_put_super(struct super_block *sb) |
| 175 | { |
| 176 | struct jfs_sb_info *sbi = JFS_SBI(sb); |
| 177 | int rc; |
| 178 | |
| 179 | jfs_info("In jfs_put_super"); |
| 180 | rc = jfs_umount(sb); |
| 181 | if (rc) |
| 182 | jfs_err("jfs_umount failed with return code %d", rc); |
| 183 | if (sbi->nls_tab) |
| 184 | unload_nls(sbi->nls_tab); |
| 185 | sbi->nls_tab = NULL; |
| 186 | |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 187 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
| 188 | iput(sbi->direct_inode); |
| 189 | sbi->direct_inode = NULL; |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | kfree(sbi); |
| 192 | } |
| 193 | |
| 194 | enum { |
| 195 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 196 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
Dave Kleikamp | 69eb66d | 2006-03-09 13:59:30 -0600 | [diff] [blame] | 197 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | }; |
| 199 | |
| 200 | static match_table_t tokens = { |
| 201 | {Opt_integrity, "integrity"}, |
| 202 | {Opt_nointegrity, "nointegrity"}, |
| 203 | {Opt_iocharset, "iocharset=%s"}, |
| 204 | {Opt_resize, "resize=%u"}, |
| 205 | {Opt_resize_nosize, "resize"}, |
| 206 | {Opt_errors, "errors=%s"}, |
| 207 | {Opt_ignore, "noquota"}, |
| 208 | {Opt_ignore, "quota"}, |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 209 | {Opt_usrquota, "usrquota"}, |
| 210 | {Opt_grpquota, "grpquota"}, |
Dave Kleikamp | 69eb66d | 2006-03-09 13:59:30 -0600 | [diff] [blame] | 211 | {Opt_uid, "uid=%u"}, |
| 212 | {Opt_gid, "gid=%u"}, |
| 213 | {Opt_umask, "umask=%u"}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | {Opt_err, NULL} |
| 215 | }; |
| 216 | |
| 217 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, |
| 218 | int *flag) |
| 219 | { |
| 220 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ |
| 221 | char *p; |
| 222 | struct jfs_sb_info *sbi = JFS_SBI(sb); |
| 223 | |
| 224 | *newLVSize = 0; |
| 225 | |
| 226 | if (!options) |
| 227 | return 1; |
| 228 | |
| 229 | while ((p = strsep(&options, ",")) != NULL) { |
| 230 | substring_t args[MAX_OPT_ARGS]; |
| 231 | int token; |
| 232 | if (!*p) |
| 233 | continue; |
| 234 | |
| 235 | token = match_token(p, tokens, args); |
| 236 | switch (token) { |
| 237 | case Opt_integrity: |
| 238 | *flag &= ~JFS_NOINTEGRITY; |
| 239 | break; |
| 240 | case Opt_nointegrity: |
| 241 | *flag |= JFS_NOINTEGRITY; |
| 242 | break; |
| 243 | case Opt_ignore: |
| 244 | /* Silently ignore the quota options */ |
| 245 | /* Don't do anything ;-) */ |
| 246 | break; |
| 247 | case Opt_iocharset: |
| 248 | if (nls_map && nls_map != (void *) -1) |
| 249 | unload_nls(nls_map); |
| 250 | if (!strcmp(args[0].from, "none")) |
| 251 | nls_map = NULL; |
| 252 | else { |
| 253 | nls_map = load_nls(args[0].from); |
| 254 | if (!nls_map) { |
| 255 | printk(KERN_ERR |
| 256 | "JFS: charset not found\n"); |
| 257 | goto cleanup; |
| 258 | } |
| 259 | } |
| 260 | break; |
| 261 | case Opt_resize: |
| 262 | { |
| 263 | char *resize = args[0].from; |
| 264 | *newLVSize = simple_strtoull(resize, &resize, 0); |
| 265 | break; |
| 266 | } |
| 267 | case Opt_resize_nosize: |
| 268 | { |
| 269 | *newLVSize = sb->s_bdev->bd_inode->i_size >> |
| 270 | sb->s_blocksize_bits; |
| 271 | if (*newLVSize == 0) |
| 272 | printk(KERN_ERR |
| 273 | "JFS: Cannot determine volume size\n"); |
| 274 | break; |
| 275 | } |
| 276 | case Opt_errors: |
| 277 | { |
| 278 | char *errors = args[0].from; |
| 279 | if (!errors || !*errors) |
| 280 | goto cleanup; |
| 281 | if (!strcmp(errors, "continue")) { |
| 282 | *flag &= ~JFS_ERR_REMOUNT_RO; |
| 283 | *flag &= ~JFS_ERR_PANIC; |
| 284 | *flag |= JFS_ERR_CONTINUE; |
| 285 | } else if (!strcmp(errors, "remount-ro")) { |
| 286 | *flag &= ~JFS_ERR_CONTINUE; |
| 287 | *flag &= ~JFS_ERR_PANIC; |
| 288 | *flag |= JFS_ERR_REMOUNT_RO; |
| 289 | } else if (!strcmp(errors, "panic")) { |
| 290 | *flag &= ~JFS_ERR_CONTINUE; |
| 291 | *flag &= ~JFS_ERR_REMOUNT_RO; |
| 292 | *flag |= JFS_ERR_PANIC; |
| 293 | } else { |
| 294 | printk(KERN_ERR |
| 295 | "JFS: %s is an invalid error handler\n", |
| 296 | errors); |
| 297 | goto cleanup; |
| 298 | } |
| 299 | break; |
| 300 | } |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 301 | |
Dave Kleikamp | 115ff50 | 2006-07-26 14:52:13 -0500 | [diff] [blame] | 302 | #ifdef CONFIG_QUOTA |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 303 | case Opt_quota: |
| 304 | case Opt_usrquota: |
| 305 | *flag |= JFS_USRQUOTA; |
| 306 | break; |
| 307 | case Opt_grpquota: |
| 308 | *flag |= JFS_GRPQUOTA; |
| 309 | break; |
| 310 | #else |
| 311 | case Opt_usrquota: |
| 312 | case Opt_grpquota: |
| 313 | case Opt_quota: |
| 314 | printk(KERN_ERR |
| 315 | "JFS: quota operations not supported\n"); |
| 316 | break; |
| 317 | #endif |
Dave Kleikamp | 69eb66d | 2006-03-09 13:59:30 -0600 | [diff] [blame] | 318 | case Opt_uid: |
| 319 | { |
| 320 | char *uid = args[0].from; |
| 321 | sbi->uid = simple_strtoul(uid, &uid, 0); |
| 322 | break; |
| 323 | } |
| 324 | case Opt_gid: |
| 325 | { |
| 326 | char *gid = args[0].from; |
| 327 | sbi->gid = simple_strtoul(gid, &gid, 0); |
| 328 | break; |
| 329 | } |
| 330 | case Opt_umask: |
| 331 | { |
| 332 | char *umask = args[0].from; |
| 333 | sbi->umask = simple_strtoul(umask, &umask, 8); |
| 334 | if (sbi->umask & ~0777) { |
| 335 | printk(KERN_ERR |
| 336 | "JFS: Invalid value of umask\n"); |
| 337 | goto cleanup; |
| 338 | } |
| 339 | break; |
| 340 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | default: |
| 342 | printk("jfs: Unrecognized mount option \"%s\" " |
| 343 | " or missing value\n", p); |
| 344 | goto cleanup; |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | if (nls_map != (void *) -1) { |
| 349 | /* Discard old (if remount) */ |
| 350 | if (sbi->nls_tab) |
| 351 | unload_nls(sbi->nls_tab); |
| 352 | sbi->nls_tab = nls_map; |
| 353 | } |
| 354 | return 1; |
| 355 | |
| 356 | cleanup: |
| 357 | if (nls_map && nls_map != (void *) -1) |
| 358 | unload_nls(nls_map); |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static int jfs_remount(struct super_block *sb, int *flags, char *data) |
| 363 | { |
| 364 | s64 newLVSize = 0; |
| 365 | int rc = 0; |
| 366 | int flag = JFS_SBI(sb)->flag; |
| 367 | |
| 368 | if (!parse_options(data, sb, &newLVSize, &flag)) { |
| 369 | return -EINVAL; |
| 370 | } |
| 371 | if (newLVSize) { |
| 372 | if (sb->s_flags & MS_RDONLY) { |
| 373 | printk(KERN_ERR |
| 374 | "JFS: resize requires volume to be mounted read-write\n"); |
| 375 | return -EROFS; |
| 376 | } |
| 377 | rc = jfs_extendfs(sb, newLVSize, 0); |
| 378 | if (rc) |
| 379 | return rc; |
| 380 | } |
| 381 | |
| 382 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 383 | /* |
| 384 | * Invalidate any previously read metadata. fsck may have |
| 385 | * changed the on-disk data since we mounted r/o |
| 386 | */ |
| 387 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); |
| 388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | JFS_SBI(sb)->flag = flag; |
| 390 | return jfs_mount_rw(sb, 1); |
| 391 | } |
| 392 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { |
| 393 | rc = jfs_umount_rw(sb); |
| 394 | JFS_SBI(sb)->flag = flag; |
| 395 | return rc; |
| 396 | } |
| 397 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) |
| 398 | if (!(sb->s_flags & MS_RDONLY)) { |
| 399 | rc = jfs_umount_rw(sb); |
| 400 | if (rc) |
| 401 | return rc; |
| 402 | JFS_SBI(sb)->flag = flag; |
| 403 | return jfs_mount_rw(sb, 1); |
| 404 | } |
| 405 | JFS_SBI(sb)->flag = flag; |
| 406 | |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) |
| 411 | { |
| 412 | struct jfs_sb_info *sbi; |
| 413 | struct inode *inode; |
| 414 | int rc; |
| 415 | s64 newLVSize = 0; |
| 416 | int flag; |
| 417 | |
| 418 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); |
| 419 | |
| 420 | if (!new_valid_dev(sb->s_bdev->bd_dev)) |
| 421 | return -EOVERFLOW; |
| 422 | |
Eric Sesterhenn | 5b3030e | 2006-02-23 09:47:13 -0600 | [diff] [blame] | 423 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | if (!sbi) |
Akinobu Mita | 087387f | 2006-09-14 09:22:38 -0500 | [diff] [blame^] | 425 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | sb->s_fs_info = sbi; |
| 427 | sbi->sb = sb; |
Dave Kleikamp | 69eb66d | 2006-03-09 13:59:30 -0600 | [diff] [blame] | 428 | sbi->uid = sbi->gid = sbi->umask = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | /* initialize the mount flag and determine the default error handler */ |
| 431 | flag = JFS_ERR_REMOUNT_RO; |
| 432 | |
| 433 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) { |
| 434 | kfree(sbi); |
| 435 | return -EINVAL; |
| 436 | } |
| 437 | sbi->flag = flag; |
| 438 | |
| 439 | #ifdef CONFIG_JFS_POSIX_ACL |
| 440 | sb->s_flags |= MS_POSIXACL; |
| 441 | #endif |
| 442 | |
| 443 | if (newLVSize) { |
| 444 | printk(KERN_ERR "resize option for remount only\n"); |
| 445 | return -EINVAL; |
| 446 | } |
| 447 | |
| 448 | /* |
| 449 | * Initialize blocksize to 4K. |
| 450 | */ |
| 451 | sb_set_blocksize(sb, PSIZE); |
| 452 | |
| 453 | /* |
| 454 | * Set method vectors. |
| 455 | */ |
| 456 | sb->s_op = &jfs_super_operations; |
| 457 | sb->s_export_op = &jfs_export_operations; |
| 458 | |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 459 | /* |
| 460 | * Initialize direct-mapping inode/address-space |
| 461 | */ |
| 462 | inode = new_inode(sb); |
| 463 | if (inode == NULL) |
| 464 | goto out_kfree; |
| 465 | inode->i_ino = 0; |
| 466 | inode->i_nlink = 1; |
| 467 | inode->i_size = sb->s_bdev->bd_inode->i_size; |
| 468 | inode->i_mapping->a_ops = &jfs_metapage_aops; |
Dave Kleikamp | ac17b8b | 2005-10-03 15:32:11 -0500 | [diff] [blame] | 469 | insert_inode_hash(inode); |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 470 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
| 471 | |
| 472 | sbi->direct_inode = inode; |
| 473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | rc = jfs_mount(sb); |
| 475 | if (rc) { |
| 476 | if (!silent) { |
| 477 | jfs_err("jfs_mount failed w/return code = %d", rc); |
| 478 | } |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 479 | goto out_mount_failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | } |
| 481 | if (sb->s_flags & MS_RDONLY) |
| 482 | sbi->log = NULL; |
| 483 | else { |
| 484 | rc = jfs_mount_rw(sb, 0); |
| 485 | if (rc) { |
| 486 | if (!silent) { |
| 487 | jfs_err("jfs_mount_rw failed, return code = %d", |
| 488 | rc); |
| 489 | } |
| 490 | goto out_no_rw; |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | sb->s_magic = JFS_SUPER_MAGIC; |
| 495 | |
| 496 | inode = iget(sb, ROOT_I); |
| 497 | if (!inode || is_bad_inode(inode)) |
| 498 | goto out_no_root; |
| 499 | sb->s_root = d_alloc_root(inode); |
| 500 | if (!sb->s_root) |
| 501 | goto out_no_root; |
| 502 | |
| 503 | if (sbi->mntflag & JFS_OS2) |
| 504 | sb->s_root->d_op = &jfs_ci_dentry_operations; |
| 505 | |
| 506 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ |
| 507 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; |
| 508 | #if BITS_PER_LONG == 32 |
| 509 | /* |
| 510 | * Page cache is indexed by long. |
| 511 | * I would use MAX_LFS_FILESIZE, but it's only half as big |
| 512 | */ |
| 513 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); |
| 514 | #endif |
| 515 | sb->s_time_gran = 1; |
| 516 | return 0; |
| 517 | |
| 518 | out_no_root: |
| 519 | jfs_err("jfs_read_super: get root inode failed"); |
| 520 | if (inode) |
| 521 | iput(inode); |
| 522 | |
| 523 | out_no_rw: |
| 524 | rc = jfs_umount(sb); |
| 525 | if (rc) { |
| 526 | jfs_err("jfs_umount failed with return code %d", rc); |
| 527 | } |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 528 | out_mount_failed: |
OGAWA Hirofumi | 28fd129 | 2006-01-08 01:02:14 -0800 | [diff] [blame] | 529 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 530 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
| 531 | make_bad_inode(sbi->direct_inode); |
| 532 | iput(sbi->direct_inode); |
| 533 | sbi->direct_inode = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | out_kfree: |
| 535 | if (sbi->nls_tab) |
| 536 | unload_nls(sbi->nls_tab); |
| 537 | kfree(sbi); |
| 538 | return -EINVAL; |
| 539 | } |
| 540 | |
| 541 | static void jfs_write_super_lockfs(struct super_block *sb) |
| 542 | { |
| 543 | struct jfs_sb_info *sbi = JFS_SBI(sb); |
| 544 | struct jfs_log *log = sbi->log; |
| 545 | |
| 546 | if (!(sb->s_flags & MS_RDONLY)) { |
| 547 | txQuiesce(sb); |
| 548 | lmLogShutdown(log); |
| 549 | updateSuper(sb, FM_CLEAN); |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | static void jfs_unlockfs(struct super_block *sb) |
| 554 | { |
| 555 | struct jfs_sb_info *sbi = JFS_SBI(sb); |
| 556 | struct jfs_log *log = sbi->log; |
| 557 | int rc = 0; |
| 558 | |
| 559 | if (!(sb->s_flags & MS_RDONLY)) { |
| 560 | updateSuper(sb, FM_MOUNT); |
| 561 | if ((rc = lmLogInit(log))) |
| 562 | jfs_err("jfs_unlock failed with return code %d", rc); |
| 563 | else |
| 564 | txResume(sb); |
| 565 | } |
| 566 | } |
| 567 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 568 | static int jfs_get_sb(struct file_system_type *fs_type, |
| 569 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 571 | return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super, |
| 572 | mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | static int jfs_sync_fs(struct super_block *sb, int wait) |
| 576 | { |
| 577 | struct jfs_log *log = JFS_SBI(sb)->log; |
| 578 | |
| 579 | /* log == NULL indicates read-only mount */ |
Dave Kleikamp | 1c62782 | 2005-05-02 12:25:08 -0600 | [diff] [blame] | 580 | if (log) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | jfs_flush_journal(log, wait); |
Dave Kleikamp | cbc3d65 | 2005-07-27 09:17:57 -0500 | [diff] [blame] | 582 | jfs_syncpt(log, 0); |
Dave Kleikamp | 1c62782 | 2005-05-02 12:25:08 -0600 | [diff] [blame] | 583 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
| 585 | return 0; |
| 586 | } |
| 587 | |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 588 | static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
| 589 | { |
| 590 | struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); |
| 591 | |
Dave Kleikamp | 69eb66d | 2006-03-09 13:59:30 -0600 | [diff] [blame] | 592 | if (sbi->uid != -1) |
| 593 | seq_printf(seq, ",uid=%d", sbi->uid); |
| 594 | if (sbi->gid != -1) |
| 595 | seq_printf(seq, ",gid=%d", sbi->gid); |
| 596 | if (sbi->umask != -1) |
| 597 | seq_printf(seq, ",umask=%03o", sbi->umask); |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 598 | if (sbi->flag & JFS_NOINTEGRITY) |
| 599 | seq_puts(seq, ",nointegrity"); |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 600 | |
Dave Kleikamp | 115ff50 | 2006-07-26 14:52:13 -0500 | [diff] [blame] | 601 | #ifdef CONFIG_QUOTA |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 602 | if (sbi->flag & JFS_USRQUOTA) |
| 603 | seq_puts(seq, ",usrquota"); |
| 604 | |
| 605 | if (sbi->flag & JFS_GRPQUOTA) |
| 606 | seq_puts(seq, ",grpquota"); |
| 607 | #endif |
| 608 | |
| 609 | return 0; |
| 610 | } |
| 611 | |
Dave Kleikamp | 115ff50 | 2006-07-26 14:52:13 -0500 | [diff] [blame] | 612 | #ifdef CONFIG_QUOTA |
| 613 | |
| 614 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 615 | * acquiring the locks... As quota files are never truncated and quota code |
| 616 | * itself serializes the operations (and noone else should touch the files) |
| 617 | * we don't have to be afraid of races */ |
| 618 | static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, |
| 619 | size_t len, loff_t off) |
| 620 | { |
| 621 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 622 | sector_t blk = off >> sb->s_blocksize_bits; |
| 623 | int err = 0; |
| 624 | int offset = off & (sb->s_blocksize - 1); |
| 625 | int tocopy; |
| 626 | size_t toread; |
| 627 | struct buffer_head tmp_bh; |
| 628 | struct buffer_head *bh; |
| 629 | loff_t i_size = i_size_read(inode); |
| 630 | |
| 631 | if (off > i_size) |
| 632 | return 0; |
| 633 | if (off+len > i_size) |
| 634 | len = i_size-off; |
| 635 | toread = len; |
| 636 | while (toread > 0) { |
| 637 | tocopy = sb->s_blocksize - offset < toread ? |
| 638 | sb->s_blocksize - offset : toread; |
| 639 | |
| 640 | tmp_bh.b_state = 0; |
| 641 | tmp_bh.b_size = 1 << inode->i_blkbits; |
| 642 | err = jfs_get_block(inode, blk, &tmp_bh, 0); |
| 643 | if (err) |
| 644 | return err; |
| 645 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ |
| 646 | memset(data, 0, tocopy); |
| 647 | else { |
| 648 | bh = sb_bread(sb, tmp_bh.b_blocknr); |
| 649 | if (!bh) |
| 650 | return -EIO; |
| 651 | memcpy(data, bh->b_data+offset, tocopy); |
| 652 | brelse(bh); |
| 653 | } |
| 654 | offset = 0; |
| 655 | toread -= tocopy; |
| 656 | data += tocopy; |
| 657 | blk++; |
| 658 | } |
| 659 | return len; |
| 660 | } |
| 661 | |
| 662 | /* Write to quotafile */ |
| 663 | static ssize_t jfs_quota_write(struct super_block *sb, int type, |
| 664 | const char *data, size_t len, loff_t off) |
| 665 | { |
| 666 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 667 | sector_t blk = off >> sb->s_blocksize_bits; |
| 668 | int err = 0; |
| 669 | int offset = off & (sb->s_blocksize - 1); |
| 670 | int tocopy; |
| 671 | size_t towrite = len; |
| 672 | struct buffer_head tmp_bh; |
| 673 | struct buffer_head *bh; |
| 674 | |
| 675 | mutex_lock(&inode->i_mutex); |
| 676 | while (towrite > 0) { |
| 677 | tocopy = sb->s_blocksize - offset < towrite ? |
| 678 | sb->s_blocksize - offset : towrite; |
| 679 | |
| 680 | tmp_bh.b_state = 0; |
Dave Kleikamp | 8bcb283 | 2006-07-28 08:46:05 -0500 | [diff] [blame] | 681 | tmp_bh.b_size = 1 << inode->i_blkbits; |
Dave Kleikamp | 115ff50 | 2006-07-26 14:52:13 -0500 | [diff] [blame] | 682 | err = jfs_get_block(inode, blk, &tmp_bh, 1); |
| 683 | if (err) |
| 684 | goto out; |
| 685 | if (offset || tocopy != sb->s_blocksize) |
| 686 | bh = sb_bread(sb, tmp_bh.b_blocknr); |
| 687 | else |
| 688 | bh = sb_getblk(sb, tmp_bh.b_blocknr); |
| 689 | if (!bh) { |
| 690 | err = -EIO; |
| 691 | goto out; |
| 692 | } |
| 693 | lock_buffer(bh); |
| 694 | memcpy(bh->b_data+offset, data, tocopy); |
| 695 | flush_dcache_page(bh->b_page); |
| 696 | set_buffer_uptodate(bh); |
| 697 | mark_buffer_dirty(bh); |
| 698 | unlock_buffer(bh); |
| 699 | brelse(bh); |
| 700 | offset = 0; |
| 701 | towrite -= tocopy; |
| 702 | data += tocopy; |
| 703 | blk++; |
| 704 | } |
| 705 | out: |
| 706 | if (len == towrite) |
| 707 | return err; |
| 708 | if (inode->i_size < off+len-towrite) |
| 709 | i_size_write(inode, off+len-towrite); |
| 710 | inode->i_version++; |
| 711 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 712 | mark_inode_dirty(inode); |
| 713 | mutex_unlock(&inode->i_mutex); |
| 714 | return len - towrite; |
| 715 | } |
| 716 | |
| 717 | #endif |
| 718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | static struct super_operations jfs_super_operations = { |
| 720 | .alloc_inode = jfs_alloc_inode, |
| 721 | .destroy_inode = jfs_destroy_inode, |
| 722 | .read_inode = jfs_read_inode, |
| 723 | .dirty_inode = jfs_dirty_inode, |
| 724 | .write_inode = jfs_write_inode, |
| 725 | .delete_inode = jfs_delete_inode, |
| 726 | .put_super = jfs_put_super, |
| 727 | .sync_fs = jfs_sync_fs, |
| 728 | .write_super_lockfs = jfs_write_super_lockfs, |
| 729 | .unlockfs = jfs_unlockfs, |
| 730 | .statfs = jfs_statfs, |
| 731 | .remount_fs = jfs_remount, |
Dave Kleikamp | 115ff50 | 2006-07-26 14:52:13 -0500 | [diff] [blame] | 732 | .show_options = jfs_show_options, |
| 733 | #ifdef CONFIG_QUOTA |
| 734 | .quota_read = jfs_quota_read, |
| 735 | .quota_write = jfs_quota_write, |
| 736 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | }; |
| 738 | |
| 739 | static struct export_operations jfs_export_operations = { |
| 740 | .get_parent = jfs_get_parent, |
| 741 | }; |
| 742 | |
| 743 | static struct file_system_type jfs_fs_type = { |
| 744 | .owner = THIS_MODULE, |
| 745 | .name = "jfs", |
| 746 | .get_sb = jfs_get_sb, |
| 747 | .kill_sb = kill_block_super, |
| 748 | .fs_flags = FS_REQUIRES_DEV, |
| 749 | }; |
| 750 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) |
| 752 | { |
| 753 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; |
| 754 | |
| 755 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == |
| 756 | SLAB_CTOR_CONSTRUCTOR) { |
| 757 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
| 758 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); |
| 759 | init_rwsem(&jfs_ip->rdwrlock); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 760 | mutex_init(&jfs_ip->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | init_rwsem(&jfs_ip->xattr_sem); |
| 762 | spin_lock_init(&jfs_ip->ag_lock); |
| 763 | jfs_ip->active_ag = -1; |
| 764 | #ifdef CONFIG_JFS_POSIX_ACL |
| 765 | jfs_ip->i_acl = JFS_ACL_NOT_CACHED; |
| 766 | jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; |
| 767 | #endif |
| 768 | inode_init_once(&jfs_ip->vfs_inode); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | static int __init init_jfs_fs(void) |
| 773 | { |
| 774 | int i; |
| 775 | int rc; |
| 776 | |
| 777 | jfs_inode_cachep = |
| 778 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 779 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
| 780 | init_once, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | if (jfs_inode_cachep == NULL) |
| 782 | return -ENOMEM; |
| 783 | |
| 784 | /* |
| 785 | * Metapage initialization |
| 786 | */ |
| 787 | rc = metapage_init(); |
| 788 | if (rc) { |
| 789 | jfs_err("metapage_init failed w/rc = %d", rc); |
| 790 | goto free_slab; |
| 791 | } |
| 792 | |
| 793 | /* |
| 794 | * Transaction Manager initialization |
| 795 | */ |
| 796 | rc = txInit(); |
| 797 | if (rc) { |
| 798 | jfs_err("txInit failed w/rc = %d", rc); |
| 799 | goto free_metapage; |
| 800 | } |
| 801 | |
| 802 | /* |
| 803 | * I/O completion thread (endio) |
| 804 | */ |
Christoph Hellwig | 91dbb4d | 2006-02-15 12:49:04 -0600 | [diff] [blame] | 805 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
| 806 | if (IS_ERR(jfsIOthread)) { |
| 807 | rc = PTR_ERR(jfsIOthread); |
| 808 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | goto end_txmngr; |
| 810 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
| 812 | if (commit_threads < 1) |
| 813 | commit_threads = num_online_cpus(); |
| 814 | if (commit_threads > MAX_COMMIT_THREADS) |
| 815 | commit_threads = MAX_COMMIT_THREADS; |
| 816 | |
| 817 | for (i = 0; i < commit_threads; i++) { |
Christoph Hellwig | 91dbb4d | 2006-02-15 12:49:04 -0600 | [diff] [blame] | 818 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
| 819 | if (IS_ERR(jfsCommitThread[i])) { |
| 820 | rc = PTR_ERR(jfsCommitThread[i]); |
| 821 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | commit_threads = i; |
| 823 | goto kill_committask; |
| 824 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | } |
| 826 | |
Christoph Hellwig | 91dbb4d | 2006-02-15 12:49:04 -0600 | [diff] [blame] | 827 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
| 828 | if (IS_ERR(jfsSyncThread)) { |
| 829 | rc = PTR_ERR(jfsSyncThread); |
| 830 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | goto kill_committask; |
| 832 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | |
| 834 | #ifdef PROC_FS_JFS |
| 835 | jfs_proc_init(); |
| 836 | #endif |
| 837 | |
| 838 | return register_filesystem(&jfs_fs_type); |
| 839 | |
| 840 | kill_committask: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | for (i = 0; i < commit_threads; i++) |
Christoph Hellwig | 91dbb4d | 2006-02-15 12:49:04 -0600 | [diff] [blame] | 842 | kthread_stop(jfsCommitThread[i]); |
| 843 | kthread_stop(jfsIOthread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | end_txmngr: |
| 845 | txExit(); |
| 846 | free_metapage: |
| 847 | metapage_exit(); |
| 848 | free_slab: |
| 849 | kmem_cache_destroy(jfs_inode_cachep); |
| 850 | return rc; |
| 851 | } |
| 852 | |
| 853 | static void __exit exit_jfs_fs(void) |
| 854 | { |
| 855 | int i; |
| 856 | |
| 857 | jfs_info("exit_jfs_fs called"); |
| 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | txExit(); |
| 860 | metapage_exit(); |
Christoph Hellwig | 91dbb4d | 2006-02-15 12:49:04 -0600 | [diff] [blame] | 861 | |
| 862 | kthread_stop(jfsIOthread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | for (i = 0; i < commit_threads; i++) |
Christoph Hellwig | 91dbb4d | 2006-02-15 12:49:04 -0600 | [diff] [blame] | 864 | kthread_stop(jfsCommitThread[i]); |
| 865 | kthread_stop(jfsSyncThread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | #ifdef PROC_FS_JFS |
| 867 | jfs_proc_clean(); |
| 868 | #endif |
| 869 | unregister_filesystem(&jfs_fs_type); |
| 870 | kmem_cache_destroy(jfs_inode_cachep); |
| 871 | } |
| 872 | |
| 873 | module_init(init_jfs_fs) |
| 874 | module_exit(exit_jfs_fs) |