iget: stop HFSPLUS from using iget() and read_inode()
[linux-2.6.git] / fs / hfsplus / super.c
1 /*
2  *  linux/fs/hfsplus/super.c
3  *
4  * Copyright (C) 2001
5  * Brad Boyer (flar@allandria.com)
6  * (C) 2003 Ardis Technologies <roman@ardistech.com>
7  *
8  */
9
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/pagemap.h>
13 #include <linux/fs.h>
14 #include <linux/slab.h>
15 #include <linux/vfs.h>
16 #include <linux/nls.h>
17
18 static struct inode *hfsplus_alloc_inode(struct super_block *sb);
19 static void hfsplus_destroy_inode(struct inode *inode);
20
21 #include "hfsplus_fs.h"
22
23 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
24 {
25         struct hfs_find_data fd;
26         struct hfsplus_vh *vhdr;
27         struct inode *inode;
28         long err = -EIO;
29
30         inode = iget_locked(sb, ino);
31         if (!inode)
32                 return ERR_PTR(-ENOMEM);
33         if (!(inode->i_state & I_NEW))
34                 return inode;
35
36         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
37         init_MUTEX(&HFSPLUS_I(inode).extents_lock);
38         HFSPLUS_I(inode).flags = 0;
39         HFSPLUS_I(inode).rsrc_inode = NULL;
40         atomic_set(&HFSPLUS_I(inode).opencnt, 0);
41
42         if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
43         read_inode:
44                 hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
45                 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
46                 if (!err)
47                         err = hfsplus_cat_read_inode(inode, &fd);
48                 hfs_find_exit(&fd);
49                 if (err)
50                         goto bad_inode;
51                 goto done;
52         }
53         vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
54         switch(inode->i_ino) {
55         case HFSPLUS_ROOT_CNID:
56                 goto read_inode;
57         case HFSPLUS_EXT_CNID:
58                 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
59                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
60                 break;
61         case HFSPLUS_CAT_CNID:
62                 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
63                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
64                 break;
65         case HFSPLUS_ALLOC_CNID:
66                 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
67                 inode->i_mapping->a_ops = &hfsplus_aops;
68                 break;
69         case HFSPLUS_START_CNID:
70                 hfsplus_inode_read_fork(inode, &vhdr->start_file);
71                 break;
72         case HFSPLUS_ATTR_CNID:
73                 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
74                 inode->i_mapping->a_ops = &hfsplus_btree_aops;
75                 break;
76         default:
77                 goto bad_inode;
78         }
79
80 done:
81         unlock_new_inode(inode);
82         return inode;
83
84 bad_inode:
85         iget_failed(inode);
86         return ERR_PTR(err);
87 }
88
89 static int hfsplus_write_inode(struct inode *inode, int unused)
90 {
91         struct hfsplus_vh *vhdr;
92         int ret = 0;
93
94         dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
95         hfsplus_ext_write_extent(inode);
96         if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
97                 return hfsplus_cat_write_inode(inode);
98         }
99         vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
100         switch (inode->i_ino) {
101         case HFSPLUS_ROOT_CNID:
102                 ret = hfsplus_cat_write_inode(inode);
103                 break;
104         case HFSPLUS_EXT_CNID:
105                 if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) {
106                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
107                         inode->i_sb->s_dirt = 1;
108                 }
109                 hfsplus_inode_write_fork(inode, &vhdr->ext_file);
110                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree);
111                 break;
112         case HFSPLUS_CAT_CNID:
113                 if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) {
114                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
115                         inode->i_sb->s_dirt = 1;
116                 }
117                 hfsplus_inode_write_fork(inode, &vhdr->cat_file);
118                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree);
119                 break;
120         case HFSPLUS_ALLOC_CNID:
121                 if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) {
122                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
123                         inode->i_sb->s_dirt = 1;
124                 }
125                 hfsplus_inode_write_fork(inode, &vhdr->alloc_file);
126                 break;
127         case HFSPLUS_START_CNID:
128                 if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) {
129                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
130                         inode->i_sb->s_dirt = 1;
131                 }
132                 hfsplus_inode_write_fork(inode, &vhdr->start_file);
133                 break;
134         case HFSPLUS_ATTR_CNID:
135                 if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) {
136                         HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
137                         inode->i_sb->s_dirt = 1;
138                 }
139                 hfsplus_inode_write_fork(inode, &vhdr->attr_file);
140                 hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree);
141                 break;
142         }
143         return ret;
144 }
145
146 static void hfsplus_clear_inode(struct inode *inode)
147 {
148         dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino);
149         if (HFSPLUS_IS_RSRC(inode)) {
150                 HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL;
151                 iput(HFSPLUS_I(inode).rsrc_inode);
152         }
153 }
154
155 static void hfsplus_write_super(struct super_block *sb)
156 {
157         struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
158
159         dprint(DBG_SUPER, "hfsplus_write_super\n");
160         sb->s_dirt = 0;
161         if (sb->s_flags & MS_RDONLY)
162                 /* warn? */
163                 return;
164
165         vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
166         vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
167         vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid);
168         vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count);
169         vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count);
170
171         mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
172         if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) {
173                 if (HFSPLUS_SB(sb).sect_count) {
174                         struct buffer_head *bh;
175                         u32 block, offset;
176
177                         block = HFSPLUS_SB(sb).blockoffset;
178                         block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9);
179                         offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1);
180                         printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
181                                 HFSPLUS_SB(sb).sect_count, block, offset);
182                         bh = sb_bread(sb, block);
183                         if (bh) {
184                                 vhdr = (struct hfsplus_vh *)(bh->b_data + offset);
185                                 if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) {
186                                         memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr));
187                                         mark_buffer_dirty(bh);
188                                         brelse(bh);
189                                 } else
190                                         printk(KERN_WARNING "hfs: backup not found!\n");
191                         }
192                 }
193                 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
194         }
195 }
196
197 static void hfsplus_put_super(struct super_block *sb)
198 {
199         dprint(DBG_SUPER, "hfsplus_put_super\n");
200         if (!sb->s_fs_info)
201                 return;
202         if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
203                 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
204
205                 vhdr->modify_date = hfsp_now2mt();
206                 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
207                 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
208                 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
209                 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
210         }
211
212         hfs_btree_close(HFSPLUS_SB(sb).cat_tree);
213         hfs_btree_close(HFSPLUS_SB(sb).ext_tree);
214         iput(HFSPLUS_SB(sb).alloc_file);
215         iput(HFSPLUS_SB(sb).hidden_dir);
216         brelse(HFSPLUS_SB(sb).s_vhbh);
217         if (HFSPLUS_SB(sb).nls)
218                 unload_nls(HFSPLUS_SB(sb).nls);
219         kfree(sb->s_fs_info);
220         sb->s_fs_info = NULL;
221 }
222
223 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
224 {
225         struct super_block *sb = dentry->d_sb;
226
227         buf->f_type = HFSPLUS_SUPER_MAGIC;
228         buf->f_bsize = sb->s_blocksize;
229         buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
230         buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
231         buf->f_bavail = buf->f_bfree;
232         buf->f_files = 0xFFFFFFFF;
233         buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
234         buf->f_namelen = HFSPLUS_MAX_STRLEN;
235
236         return 0;
237 }
238
239 static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
240 {
241         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
242                 return 0;
243         if (!(*flags & MS_RDONLY)) {
244                 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
245                 struct hfsplus_sb_info sbi;
246
247                 memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
248                 sbi.nls = HFSPLUS_SB(sb).nls;
249                 if (!hfsplus_parse_options(data, &sbi))
250                         return -EINVAL;
251
252                 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
253                         printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
254                                "running fsck.hfsplus is recommended.  leaving read-only.\n");
255                         sb->s_flags |= MS_RDONLY;
256                         *flags |= MS_RDONLY;
257                 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
258                         /* nothing */
259                 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
260                         printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
261                         sb->s_flags |= MS_RDONLY;
262                         *flags |= MS_RDONLY;
263                 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
264                         printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
265                         sb->s_flags |= MS_RDONLY;
266                         *flags |= MS_RDONLY;
267                 }
268         }
269         return 0;
270 }
271
272 static const struct super_operations hfsplus_sops = {
273         .alloc_inode    = hfsplus_alloc_inode,
274         .destroy_inode  = hfsplus_destroy_inode,
275         .write_inode    = hfsplus_write_inode,
276         .clear_inode    = hfsplus_clear_inode,
277         .put_super      = hfsplus_put_super,
278         .write_super    = hfsplus_write_super,
279         .statfs         = hfsplus_statfs,
280         .remount_fs     = hfsplus_remount,
281         .show_options   = hfsplus_show_options,
282 };
283
284 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
285 {
286         struct hfsplus_vh *vhdr;
287         struct hfsplus_sb_info *sbi;
288         hfsplus_cat_entry entry;
289         struct hfs_find_data fd;
290         struct inode *root, *inode;
291         struct qstr str;
292         struct nls_table *nls = NULL;
293         int err = -EINVAL;
294
295         sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
296         if (!sbi)
297                 return -ENOMEM;
298
299         sb->s_fs_info = sbi;
300         INIT_HLIST_HEAD(&sbi->rsrc_inodes);
301         hfsplus_fill_defaults(sbi);
302         if (!hfsplus_parse_options(data, sbi)) {
303                 printk(KERN_ERR "hfs: unable to parse mount options\n");
304                 err = -EINVAL;
305                 goto cleanup;
306         }
307
308         /* temporarily use utf8 to correctly find the hidden dir below */
309         nls = sbi->nls;
310         sbi->nls = load_nls("utf8");
311         if (!sbi->nls) {
312                 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
313                 err = -EINVAL;
314                 goto cleanup;
315         }
316
317         /* Grab the volume header */
318         if (hfsplus_read_wrapper(sb)) {
319                 if (!silent)
320                         printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
321                 err = -EINVAL;
322                 goto cleanup;
323         }
324         vhdr = HFSPLUS_SB(sb).s_vhdr;
325
326         /* Copy parts of the volume header into the superblock */
327         sb->s_magic = HFSPLUS_VOLHEAD_SIG;
328         if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
329             be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
330                 printk(KERN_ERR "hfs: wrong filesystem version\n");
331                 goto cleanup;
332         }
333         HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
334         HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
335         HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
336         HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
337         HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
338         HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
339         HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
340         if (!HFSPLUS_SB(sb).data_clump_blocks)
341                 HFSPLUS_SB(sb).data_clump_blocks = 1;
342         HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
343         if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
344                 HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
345
346         /* Set up operations so we can load metadata */
347         sb->s_op = &hfsplus_sops;
348         sb->s_maxbytes = MAX_LFS_FILESIZE;
349
350         if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
351                 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
352                        "running fsck.hfsplus is recommended.  mounting read-only.\n");
353                 sb->s_flags |= MS_RDONLY;
354         } else if (sbi->flags & HFSPLUS_SB_FORCE) {
355                 /* nothing */
356         } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
357                 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
358                 sb->s_flags |= MS_RDONLY;
359         } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
360                 printk(KERN_WARNING "hfs: write access to a jounaled filesystem is not supported, "
361                        "use the force option at your own risk, mounting read-only.\n");
362                 sb->s_flags |= MS_RDONLY;
363         }
364         sbi->flags &= ~HFSPLUS_SB_FORCE;
365
366         /* Load metadata objects (B*Trees) */
367         HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
368         if (!HFSPLUS_SB(sb).ext_tree) {
369                 printk(KERN_ERR "hfs: failed to load extents file\n");
370                 goto cleanup;
371         }
372         HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
373         if (!HFSPLUS_SB(sb).cat_tree) {
374                 printk(KERN_ERR "hfs: failed to load catalog file\n");
375                 goto cleanup;
376         }
377
378         inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
379         if (IS_ERR(inode)) {
380                 printk(KERN_ERR "hfs: failed to load allocation file\n");
381                 err = PTR_ERR(inode);
382                 goto cleanup;
383         }
384         HFSPLUS_SB(sb).alloc_file = inode;
385
386         /* Load the root directory */
387         root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
388         if (IS_ERR(root)) {
389                 printk(KERN_ERR "hfs: failed to load root directory\n");
390                 err = PTR_ERR(root);
391                 goto cleanup;
392         }
393         sb->s_root = d_alloc_root(root);
394         if (!sb->s_root) {
395                 iput(root);
396                 err = -ENOMEM;
397                 goto cleanup;
398         }
399         sb->s_root->d_op = &hfsplus_dentry_operations;
400
401         str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
402         str.name = HFSP_HIDDENDIR_NAME;
403         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
404         hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
405         if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
406                 hfs_find_exit(&fd);
407                 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
408                         goto cleanup;
409                 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
410                 if (IS_ERR(inode)) {
411                         err = PTR_ERR(inode);
412                         goto cleanup;
413                 }
414                 HFSPLUS_SB(sb).hidden_dir = inode;
415         } else
416                 hfs_find_exit(&fd);
417
418         if (sb->s_flags & MS_RDONLY)
419                 goto out;
420
421         /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
422          * all three are registered with Apple for our use
423          */
424         vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
425         vhdr->modify_date = hfsp_now2mt();
426         vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1);
427         vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
428         vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
429         mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
430         sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
431
432         if (!HFSPLUS_SB(sb).hidden_dir) {
433                 printk(KERN_DEBUG "hfs: create hidden dir...\n");
434                 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
435                 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
436                                    &str, HFSPLUS_SB(sb).hidden_dir);
437                 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
438         }
439 out:
440         unload_nls(sbi->nls);
441         sbi->nls = nls;
442         return 0;
443
444 cleanup:
445         hfsplus_put_super(sb);
446         if (nls)
447                 unload_nls(nls);
448         return err;
449 }
450
451 MODULE_AUTHOR("Brad Boyer");
452 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
453 MODULE_LICENSE("GPL");
454
455 static struct kmem_cache *hfsplus_inode_cachep;
456
457 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
458 {
459         struct hfsplus_inode_info *i;
460
461         i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
462         return i ? &i->vfs_inode : NULL;
463 }
464
465 static void hfsplus_destroy_inode(struct inode *inode)
466 {
467         kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
468 }
469
470 #define HFSPLUS_INODE_SIZE      sizeof(struct hfsplus_inode_info)
471
472 static int hfsplus_get_sb(struct file_system_type *fs_type,
473                           int flags, const char *dev_name, void *data,
474                           struct vfsmount *mnt)
475 {
476         return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
477                            mnt);
478 }
479
480 static struct file_system_type hfsplus_fs_type = {
481         .owner          = THIS_MODULE,
482         .name           = "hfsplus",
483         .get_sb         = hfsplus_get_sb,
484         .kill_sb        = kill_block_super,
485         .fs_flags       = FS_REQUIRES_DEV,
486 };
487
488 static void hfsplus_init_once(struct kmem_cache *cachep, void *p)
489 {
490         struct hfsplus_inode_info *i = p;
491
492         inode_init_once(&i->vfs_inode);
493 }
494
495 static int __init init_hfsplus_fs(void)
496 {
497         int err;
498
499         hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
500                 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
501                 hfsplus_init_once);
502         if (!hfsplus_inode_cachep)
503                 return -ENOMEM;
504         err = register_filesystem(&hfsplus_fs_type);
505         if (err)
506                 kmem_cache_destroy(hfsplus_inode_cachep);
507         return err;
508 }
509
510 static void __exit exit_hfsplus_fs(void)
511 {
512         unregister_filesystem(&hfsplus_fs_type);
513         kmem_cache_destroy(hfsplus_inode_cachep);
514 }
515
516 module_init(init_hfsplus_fs)
517 module_exit(exit_hfsplus_fs)