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