blob: 5ed7252b7b23246aabdb015341ba19cbb101379a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/hfs/super.c
3 *
4 * Copyright (C) 1995-1997 Paul H. Hargrove
5 * (C) 2003 Ardis Technologies <roman@ardistech.com>
6 * This file may be distributed under the terms of the GNU General Public License.
7 *
8 * This file contains hfs_read_super(), some of the super_ops and
Robert P. J. Day14b30d62008-02-06 01:37:10 -08009 * init_hfs_fs() and exit_hfs_fs(). The remaining super_ops are in
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * inode.c since they deal with inodes.
11 *
12 * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
13 */
14
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/module.h>
16#include <linux/blkdev.h>
Roman Zippel717dd80e2005-09-06 15:18:48 -070017#include <linux/mount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/init.h>
Roman Zippel328b9222005-09-06 15:18:49 -070019#include <linux/nls.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/parser.h>
Roman Zippel717dd80e2005-09-06 15:18:48 -070021#include <linux/seq_file.h>
Alexey Dobriyan405f5572009-07-11 22:08:37 +040022#include <linux/smp_lock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/vfs.h>
24
25#include "hfs_fs.h"
26#include "btree.h"
27
Christoph Lametere18b8902006-12-06 20:33:20 -080028static struct kmem_cache *hfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30MODULE_LICENSE("GPL");
31
32/*
33 * hfs_write_super()
34 *
35 * Description:
36 * This function is called by the VFS only. When the filesystem
37 * is mounted r/w it updates the MDB on disk.
38 * Input Variable(s):
39 * struct super_block *sb: Pointer to the hfs superblock
40 * Output Variable(s):
41 * NONE
42 * Returns:
43 * void
44 * Preconditions:
45 * 'sb' points to a "valid" (struct super_block).
46 * Postconditions:
47 * The MDB is marked 'unsuccessfully unmounted' by clearing bit 8 of drAtrb
48 * (hfs_put_super() must set this flag!). Some MDB fields are updated
49 * and the MDB buffer is written to disk by calling hfs_mdb_commit().
50 */
51static void hfs_write_super(struct super_block *sb)
52{
Christoph Hellwigebc1ac12009-05-11 23:35:03 +020053 lock_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 sb->s_dirt = 0;
Christoph Hellwigebc1ac12009-05-11 23:35:03 +020055
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 /* sync everything to the buffers */
Christoph Hellwigebc1ac12009-05-11 23:35:03 +020057 if (!(sb->s_flags & MS_RDONLY))
58 hfs_mdb_commit(sb);
59 unlock_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060}
61
Christoph Hellwig58bc5bb2009-06-08 10:04:54 +020062static int hfs_sync_fs(struct super_block *sb, int wait)
63{
64 lock_super(sb);
65 hfs_mdb_commit(sb);
66 sb->s_dirt = 0;
67 unlock_super(sb);
68
69 return 0;
70}
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072/*
73 * hfs_put_super()
74 *
75 * This is the put_super() entry in the super_operations structure for
76 * HFS filesystems. The purpose is to release the resources
77 * associated with the superblock sb.
78 */
79static void hfs_put_super(struct super_block *sb)
80{
Christoph Hellwig6cfd0142009-05-05 15:40:36 +020081 lock_kernel();
82
Christoph Hellwig8c85e122009-04-28 18:00:26 +020083 if (sb->s_dirt)
84 hfs_write_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 hfs_mdb_close(sb);
86 /* release the MDB's resources */
87 hfs_mdb_put(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +020088
89 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -070090}
91
92/*
93 * hfs_statfs()
94 *
95 * This is the statfs() entry in the super_operations structure for
96 * HFS filesystems. The purpose is to return various data about the
97 * filesystem.
98 *
99 * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
100 */
David Howells726c3342006-06-23 02:02:58 -0700101static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102{
David Howells726c3342006-06-23 02:02:58 -0700103 struct super_block *sb = dentry->d_sb;
Coly Li7dd2c002009-04-02 16:59:35 -0700104 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 buf->f_type = HFS_SUPER_MAGIC;
107 buf->f_bsize = sb->s_blocksize;
108 buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
109 buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div;
110 buf->f_bavail = buf->f_bfree;
111 buf->f_files = HFS_SB(sb)->fs_ablocks;
112 buf->f_ffree = HFS_SB(sb)->free_ablocks;
Coly Li7dd2c002009-04-02 16:59:35 -0700113 buf->f_fsid.val[0] = (u32)id;
114 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 buf->f_namelen = HFS_NAMELEN;
116
117 return 0;
118}
119
120static int hfs_remount(struct super_block *sb, int *flags, char *data)
121{
122 *flags |= MS_NODIRATIME;
123 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
124 return 0;
125 if (!(*flags & MS_RDONLY)) {
126 if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800127 printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 "running fsck.hfs is recommended. leaving read-only.\n");
129 sb->s_flags |= MS_RDONLY;
130 *flags |= MS_RDONLY;
131 } else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800132 printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 sb->s_flags |= MS_RDONLY;
134 *flags |= MS_RDONLY;
135 }
136 }
137 return 0;
138}
139
Roman Zippel717dd80e2005-09-06 15:18:48 -0700140static int hfs_show_options(struct seq_file *seq, struct vfsmount *mnt)
141{
142 struct hfs_sb_info *sbi = HFS_SB(mnt->mnt_sb);
143
144 if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
145 seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator);
146 if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
147 seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type);
148 seq_printf(seq, ",uid=%u,gid=%u", sbi->s_uid, sbi->s_gid);
149 if (sbi->s_file_umask != 0133)
150 seq_printf(seq, ",file_umask=%o", sbi->s_file_umask);
151 if (sbi->s_dir_umask != 0022)
152 seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask);
153 if (sbi->part >= 0)
154 seq_printf(seq, ",part=%u", sbi->part);
155 if (sbi->session >= 0)
156 seq_printf(seq, ",session=%u", sbi->session);
Roman Zippel328b9222005-09-06 15:18:49 -0700157 if (sbi->nls_disk)
158 seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
159 if (sbi->nls_io)
160 seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700161 if (sbi->s_quiet)
162 seq_printf(seq, ",quiet");
163 return 0;
164}
165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166static struct inode *hfs_alloc_inode(struct super_block *sb)
167{
168 struct hfs_inode_info *i;
169
Christoph Lametere94b1762006-12-06 20:33:17 -0800170 i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 return i ? &i->vfs_inode : NULL;
172}
173
174static void hfs_destroy_inode(struct inode *inode)
175{
176 kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
177}
178
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800179static const struct super_operations hfs_super_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 .alloc_inode = hfs_alloc_inode,
181 .destroy_inode = hfs_destroy_inode,
182 .write_inode = hfs_write_inode,
183 .clear_inode = hfs_clear_inode,
184 .put_super = hfs_put_super,
185 .write_super = hfs_write_super,
Christoph Hellwig58bc5bb2009-06-08 10:04:54 +0200186 .sync_fs = hfs_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 .statfs = hfs_statfs,
188 .remount_fs = hfs_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700189 .show_options = hfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190};
191
192enum {
193 opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
194 opt_part, opt_session, opt_type, opt_creator, opt_quiet,
Roman Zippel328b9222005-09-06 15:18:49 -0700195 opt_codepage, opt_iocharset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 opt_err
197};
198
Steven Whitehousea447c092008-10-13 10:46:57 +0100199static const match_table_t tokens = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 { opt_uid, "uid=%u" },
201 { opt_gid, "gid=%u" },
202 { opt_umask, "umask=%o" },
203 { opt_file_umask, "file_umask=%o" },
204 { opt_dir_umask, "dir_umask=%o" },
205 { opt_part, "part=%u" },
206 { opt_session, "session=%u" },
207 { opt_type, "type=%s" },
208 { opt_creator, "creator=%s" },
209 { opt_quiet, "quiet" },
Roman Zippel328b9222005-09-06 15:18:49 -0700210 { opt_codepage, "codepage=%s" },
211 { opt_iocharset, "iocharset=%s" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 { opt_err, NULL }
213};
214
215static inline int match_fourchar(substring_t *arg, u32 *result)
216{
217 if (arg->to - arg->from != 4)
218 return -EINVAL;
219 memcpy(result, arg->from, 4);
220 return 0;
221}
222
223/*
224 * parse_options()
225 *
226 * adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger
227 * This function is called by hfs_read_super() to parse the mount options.
228 */
229static int parse_options(char *options, struct hfs_sb_info *hsb)
230{
231 char *p;
232 substring_t args[MAX_OPT_ARGS];
233 int tmp, token;
234
235 /* initialize the sb with defaults */
David Howells94c9a5e2008-11-14 10:38:54 +1100236 hsb->s_uid = current_uid();
237 hsb->s_gid = current_gid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 hsb->s_file_umask = 0133;
239 hsb->s_dir_umask = 0022;
240 hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
241 hsb->s_quiet = 0;
242 hsb->part = -1;
243 hsb->session = -1;
244
245 if (!options)
246 return 1;
247
248 while ((p = strsep(&options, ",")) != NULL) {
249 if (!*p)
250 continue;
251
252 token = match_token(p, tokens, args);
253 switch (token) {
254 case opt_uid:
255 if (match_int(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800256 printk(KERN_ERR "hfs: uid requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 return 0;
258 }
259 hsb->s_uid = (uid_t)tmp;
260 break;
261 case opt_gid:
262 if (match_int(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800263 printk(KERN_ERR "hfs: gid requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 return 0;
265 }
266 hsb->s_gid = (gid_t)tmp;
267 break;
268 case opt_umask:
269 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800270 printk(KERN_ERR "hfs: umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 return 0;
272 }
273 hsb->s_file_umask = (umode_t)tmp;
274 hsb->s_dir_umask = (umode_t)tmp;
275 break;
276 case opt_file_umask:
277 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800278 printk(KERN_ERR "hfs: file_umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 return 0;
280 }
281 hsb->s_file_umask = (umode_t)tmp;
282 break;
283 case opt_dir_umask:
284 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800285 printk(KERN_ERR "hfs: dir_umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 return 0;
287 }
288 hsb->s_dir_umask = (umode_t)tmp;
289 break;
290 case opt_part:
291 if (match_int(&args[0], &hsb->part)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800292 printk(KERN_ERR "hfs: part requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 return 0;
294 }
295 break;
296 case opt_session:
297 if (match_int(&args[0], &hsb->session)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800298 printk(KERN_ERR "hfs: session requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 return 0;
300 }
301 break;
302 case opt_type:
303 if (match_fourchar(&args[0], &hsb->s_type)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800304 printk(KERN_ERR "hfs: type requires a 4 character value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 return 0;
306 }
307 break;
308 case opt_creator:
309 if (match_fourchar(&args[0], &hsb->s_creator)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800310 printk(KERN_ERR "hfs: creator requires a 4 character value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 return 0;
312 }
313 break;
314 case opt_quiet:
315 hsb->s_quiet = 1;
316 break;
Roman Zippel328b9222005-09-06 15:18:49 -0700317 case opt_codepage:
318 if (hsb->nls_disk) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800319 printk(KERN_ERR "hfs: unable to change codepage\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700320 return 0;
321 }
322 p = match_strdup(&args[0]);
Jim Meyering3fbe5c32008-04-29 00:59:07 -0700323 if (p)
324 hsb->nls_disk = load_nls(p);
Roman Zippel328b9222005-09-06 15:18:49 -0700325 if (!hsb->nls_disk) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800326 printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p);
Roman Zippel328b9222005-09-06 15:18:49 -0700327 kfree(p);
328 return 0;
329 }
330 kfree(p);
331 break;
332 case opt_iocharset:
333 if (hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800334 printk(KERN_ERR "hfs: unable to change iocharset\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700335 return 0;
336 }
337 p = match_strdup(&args[0]);
Jim Meyering3fbe5c32008-04-29 00:59:07 -0700338 if (p)
339 hsb->nls_io = load_nls(p);
Roman Zippel328b9222005-09-06 15:18:49 -0700340 if (!hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800341 printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p);
Roman Zippel328b9222005-09-06 15:18:49 -0700342 kfree(p);
343 return 0;
344 }
345 kfree(p);
346 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 default:
348 return 0;
349 }
350 }
351
Roman Zippel328b9222005-09-06 15:18:49 -0700352 if (hsb->nls_disk && !hsb->nls_io) {
353 hsb->nls_io = load_nls_default();
354 if (!hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800355 printk(KERN_ERR "hfs: unable to load default iocharset\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700356 return 0;
357 }
358 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 hsb->s_dir_umask &= 0777;
360 hsb->s_file_umask &= 0577;
361
362 return 1;
363}
364
365/*
366 * hfs_read_super()
367 *
368 * This is the function that is responsible for mounting an HFS
369 * filesystem. It performs all the tasks necessary to get enough data
370 * from the disk to read the root inode. This includes parsing the
371 * mount options, dealing with Macintosh partitions, reading the
372 * superblock and the allocation bitmap blocks, calling
373 * hfs_btree_init() to get the necessary data about the extents and
374 * catalog B-trees and, finally, reading the root inode into memory.
375 */
376static int hfs_fill_super(struct super_block *sb, void *data, int silent)
377{
378 struct hfs_sb_info *sbi;
379 struct hfs_find_data fd;
380 hfs_cat_rec rec;
381 struct inode *root_inode;
382 int res;
383
Panagiotis Issarisf8314dc2006-09-27 01:49:37 -0700384 sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 if (!sbi)
386 return -ENOMEM;
387 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 INIT_HLIST_HEAD(&sbi->rsrc_inodes);
389
390 res = -EINVAL;
391 if (!parse_options((char *)data, sbi)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800392 printk(KERN_ERR "hfs: unable to parse mount options.\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700393 goto bail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 }
395
396 sb->s_op = &hfs_super_operations;
397 sb->s_flags |= MS_NODIRATIME;
Matthias Kaehlcke3084b722008-07-25 01:46:34 -0700398 mutex_init(&sbi->bitmap_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
400 res = hfs_mdb_get(sb);
401 if (res) {
402 if (!silent)
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800403 printk(KERN_WARNING "hfs: can't find a HFS filesystem on dev %s.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 hfs_mdb_name(sb));
405 res = -EINVAL;
Colin Leroy945b0922005-05-01 08:59:16 -0700406 goto bail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 }
408
409 /* try to get the root inode */
410 hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
411 res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
Amerigo Wangec81aec2009-12-14 17:57:37 -0800412 if (!res) {
413 if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
414 res = -EIO;
415 goto bail;
416 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
Amerigo Wangec81aec2009-12-14 17:57:37 -0800418 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 if (res) {
420 hfs_find_exit(&fd);
421 goto bail_no_root;
422 }
Eric Sandeend6ddf552006-11-16 01:19:22 -0800423 res = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
425 hfs_find_exit(&fd);
426 if (!root_inode)
427 goto bail_no_root;
428
Eric Sandeend6ddf552006-11-16 01:19:22 -0800429 res = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 sb->s_root = d_alloc_root(root_inode);
431 if (!sb->s_root)
432 goto bail_iput;
433
434 sb->s_root->d_op = &hfs_dentry_operations;
435
436 /* everything's okay */
437 return 0;
438
439bail_iput:
440 iput(root_inode);
441bail_no_root:
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800442 printk(KERN_ERR "hfs: get root inode failed.\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700443bail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 hfs_mdb_put(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 return res;
446}
447
David Howells454e2392006-06-23 02:02:57 -0700448static int hfs_get_sb(struct file_system_type *fs_type,
449 int flags, const char *dev_name, void *data,
450 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{
David Howells454e2392006-06-23 02:02:57 -0700452 return get_sb_bdev(fs_type, flags, dev_name, data, hfs_fill_super, mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453}
454
455static struct file_system_type hfs_fs_type = {
456 .owner = THIS_MODULE,
457 .name = "hfs",
458 .get_sb = hfs_get_sb,
459 .kill_sb = kill_block_super,
460 .fs_flags = FS_REQUIRES_DEV,
461};
462
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700463static void hfs_init_once(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
465 struct hfs_inode_info *i = p;
466
Christoph Lametera35afb82007-05-16 22:10:57 -0700467 inode_init_once(&i->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468}
469
470static int __init init_hfs_fs(void)
471{
472 int err;
473
474 hfs_inode_cachep = kmem_cache_create("hfs_inode_cache",
475 sizeof(struct hfs_inode_info), 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900476 hfs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 if (!hfs_inode_cachep)
478 return -ENOMEM;
479 err = register_filesystem(&hfs_fs_type);
480 if (err)
481 kmem_cache_destroy(hfs_inode_cachep);
482 return err;
483}
484
485static void __exit exit_hfs_fs(void)
486{
487 unregister_filesystem(&hfs_fs_type);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700488 kmem_cache_destroy(hfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489}
490
491module_init(init_hfs_fs)
492module_exit(exit_hfs_fs)