blob: 34235d4bf08bb5921768b1105b37bfff4277cd7a [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090022#include <linux/slab.h>
Alexey Dobriyan405f5572009-07-11 22:08:37 +040023#include <linux/smp_lock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/vfs.h>
25
26#include "hfs_fs.h"
27#include "btree.h"
28
Christoph Lametere18b8902006-12-06 20:33:20 -080029static struct kmem_cache *hfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31MODULE_LICENSE("GPL");
32
33/*
34 * hfs_write_super()
35 *
36 * Description:
37 * This function is called by the VFS only. When the filesystem
38 * is mounted r/w it updates the MDB on disk.
39 * Input Variable(s):
40 * struct super_block *sb: Pointer to the hfs superblock
41 * Output Variable(s):
42 * NONE
43 * Returns:
44 * void
45 * Preconditions:
46 * 'sb' points to a "valid" (struct super_block).
47 * Postconditions:
48 * The MDB is marked 'unsuccessfully unmounted' by clearing bit 8 of drAtrb
49 * (hfs_put_super() must set this flag!). Some MDB fields are updated
50 * and the MDB buffer is written to disk by calling hfs_mdb_commit().
51 */
52static void hfs_write_super(struct super_block *sb)
53{
Christoph Hellwigebc1ac12009-05-11 23:35:03 +020054 lock_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 sb->s_dirt = 0;
Christoph Hellwigebc1ac12009-05-11 23:35:03 +020056
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 /* sync everything to the buffers */
Christoph Hellwigebc1ac12009-05-11 23:35:03 +020058 if (!(sb->s_flags & MS_RDONLY))
59 hfs_mdb_commit(sb);
60 unlock_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
62
Christoph Hellwig58bc5bb2009-06-08 10:04:54 +020063static int hfs_sync_fs(struct super_block *sb, int wait)
64{
65 lock_super(sb);
66 hfs_mdb_commit(sb);
67 sb->s_dirt = 0;
68 unlock_super(sb);
69
70 return 0;
71}
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073/*
74 * hfs_put_super()
75 *
76 * This is the put_super() entry in the super_operations structure for
77 * HFS filesystems. The purpose is to release the resources
78 * associated with the superblock sb.
79 */
80static void hfs_put_super(struct super_block *sb)
81{
Christoph Hellwig6cfd0142009-05-05 15:40:36 +020082 lock_kernel();
83
Christoph Hellwig8c85e122009-04-28 18:00:26 +020084 if (sb->s_dirt)
85 hfs_write_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 hfs_mdb_close(sb);
87 /* release the MDB's resources */
88 hfs_mdb_put(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +020089
90 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -070091}
92
93/*
94 * hfs_statfs()
95 *
96 * This is the statfs() entry in the super_operations structure for
97 * HFS filesystems. The purpose is to return various data about the
98 * filesystem.
99 *
100 * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
101 */
David Howells726c3342006-06-23 02:02:58 -0700102static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103{
David Howells726c3342006-06-23 02:02:58 -0700104 struct super_block *sb = dentry->d_sb;
Coly Li7dd2c002009-04-02 16:59:35 -0700105 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 buf->f_type = HFS_SUPER_MAGIC;
108 buf->f_bsize = sb->s_blocksize;
109 buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
110 buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div;
111 buf->f_bavail = buf->f_bfree;
112 buf->f_files = HFS_SB(sb)->fs_ablocks;
113 buf->f_ffree = HFS_SB(sb)->free_ablocks;
Coly Li7dd2c002009-04-02 16:59:35 -0700114 buf->f_fsid.val[0] = (u32)id;
115 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 buf->f_namelen = HFS_NAMELEN;
117
118 return 0;
119}
120
121static int hfs_remount(struct super_block *sb, int *flags, char *data)
122{
123 *flags |= MS_NODIRATIME;
124 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
125 return 0;
126 if (!(*flags & MS_RDONLY)) {
127 if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800128 printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 "running fsck.hfs is recommended. leaving read-only.\n");
130 sb->s_flags |= MS_RDONLY;
131 *flags |= MS_RDONLY;
132 } else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800133 printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 sb->s_flags |= MS_RDONLY;
135 *flags |= MS_RDONLY;
136 }
137 }
138 return 0;
139}
140
Roman Zippel717dd80e2005-09-06 15:18:48 -0700141static int hfs_show_options(struct seq_file *seq, struct vfsmount *mnt)
142{
143 struct hfs_sb_info *sbi = HFS_SB(mnt->mnt_sb);
144
145 if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
146 seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator);
147 if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
148 seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type);
149 seq_printf(seq, ",uid=%u,gid=%u", sbi->s_uid, sbi->s_gid);
150 if (sbi->s_file_umask != 0133)
151 seq_printf(seq, ",file_umask=%o", sbi->s_file_umask);
152 if (sbi->s_dir_umask != 0022)
153 seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask);
154 if (sbi->part >= 0)
155 seq_printf(seq, ",part=%u", sbi->part);
156 if (sbi->session >= 0)
157 seq_printf(seq, ",session=%u", sbi->session);
Roman Zippel328b9222005-09-06 15:18:49 -0700158 if (sbi->nls_disk)
159 seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
160 if (sbi->nls_io)
161 seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700162 if (sbi->s_quiet)
163 seq_printf(seq, ",quiet");
164 return 0;
165}
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167static struct inode *hfs_alloc_inode(struct super_block *sb)
168{
169 struct hfs_inode_info *i;
170
Christoph Lametere94b1762006-12-06 20:33:17 -0800171 i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 return i ? &i->vfs_inode : NULL;
173}
174
175static void hfs_destroy_inode(struct inode *inode)
176{
177 kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
178}
179
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800180static const struct super_operations hfs_super_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 .alloc_inode = hfs_alloc_inode,
182 .destroy_inode = hfs_destroy_inode,
183 .write_inode = hfs_write_inode,
Al Virob57922d2010-06-07 14:34:48 -0400184 .evict_inode = hfs_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 .put_super = hfs_put_super,
186 .write_super = hfs_write_super,
Christoph Hellwig58bc5bb2009-06-08 10:04:54 +0200187 .sync_fs = hfs_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 .statfs = hfs_statfs,
189 .remount_fs = hfs_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700190 .show_options = hfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191};
192
193enum {
194 opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
195 opt_part, opt_session, opt_type, opt_creator, opt_quiet,
Roman Zippel328b9222005-09-06 15:18:49 -0700196 opt_codepage, opt_iocharset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 opt_err
198};
199
Steven Whitehousea447c092008-10-13 10:46:57 +0100200static const match_table_t tokens = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 { opt_uid, "uid=%u" },
202 { opt_gid, "gid=%u" },
203 { opt_umask, "umask=%o" },
204 { opt_file_umask, "file_umask=%o" },
205 { opt_dir_umask, "dir_umask=%o" },
206 { opt_part, "part=%u" },
207 { opt_session, "session=%u" },
208 { opt_type, "type=%s" },
209 { opt_creator, "creator=%s" },
210 { opt_quiet, "quiet" },
Roman Zippel328b9222005-09-06 15:18:49 -0700211 { opt_codepage, "codepage=%s" },
212 { opt_iocharset, "iocharset=%s" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 { opt_err, NULL }
214};
215
216static inline int match_fourchar(substring_t *arg, u32 *result)
217{
218 if (arg->to - arg->from != 4)
219 return -EINVAL;
220 memcpy(result, arg->from, 4);
221 return 0;
222}
223
224/*
225 * parse_options()
226 *
227 * adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger
228 * This function is called by hfs_read_super() to parse the mount options.
229 */
230static int parse_options(char *options, struct hfs_sb_info *hsb)
231{
232 char *p;
233 substring_t args[MAX_OPT_ARGS];
234 int tmp, token;
235
236 /* initialize the sb with defaults */
David Howells94c9a5e2008-11-14 10:38:54 +1100237 hsb->s_uid = current_uid();
238 hsb->s_gid = current_gid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 hsb->s_file_umask = 0133;
240 hsb->s_dir_umask = 0022;
241 hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
242 hsb->s_quiet = 0;
243 hsb->part = -1;
244 hsb->session = -1;
245
246 if (!options)
247 return 1;
248
249 while ((p = strsep(&options, ",")) != NULL) {
250 if (!*p)
251 continue;
252
253 token = match_token(p, tokens, args);
254 switch (token) {
255 case opt_uid:
256 if (match_int(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800257 printk(KERN_ERR "hfs: uid requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 return 0;
259 }
260 hsb->s_uid = (uid_t)tmp;
261 break;
262 case opt_gid:
263 if (match_int(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800264 printk(KERN_ERR "hfs: gid requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 return 0;
266 }
267 hsb->s_gid = (gid_t)tmp;
268 break;
269 case opt_umask:
270 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800271 printk(KERN_ERR "hfs: umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 return 0;
273 }
274 hsb->s_file_umask = (umode_t)tmp;
275 hsb->s_dir_umask = (umode_t)tmp;
276 break;
277 case opt_file_umask:
278 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800279 printk(KERN_ERR "hfs: file_umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 return 0;
281 }
282 hsb->s_file_umask = (umode_t)tmp;
283 break;
284 case opt_dir_umask:
285 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800286 printk(KERN_ERR "hfs: dir_umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return 0;
288 }
289 hsb->s_dir_umask = (umode_t)tmp;
290 break;
291 case opt_part:
292 if (match_int(&args[0], &hsb->part)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800293 printk(KERN_ERR "hfs: part requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 return 0;
295 }
296 break;
297 case opt_session:
298 if (match_int(&args[0], &hsb->session)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800299 printk(KERN_ERR "hfs: session requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 return 0;
301 }
302 break;
303 case opt_type:
304 if (match_fourchar(&args[0], &hsb->s_type)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800305 printk(KERN_ERR "hfs: type requires a 4 character value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 return 0;
307 }
308 break;
309 case opt_creator:
310 if (match_fourchar(&args[0], &hsb->s_creator)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800311 printk(KERN_ERR "hfs: creator requires a 4 character value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 return 0;
313 }
314 break;
315 case opt_quiet:
316 hsb->s_quiet = 1;
317 break;
Roman Zippel328b9222005-09-06 15:18:49 -0700318 case opt_codepage:
319 if (hsb->nls_disk) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800320 printk(KERN_ERR "hfs: unable to change codepage\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700321 return 0;
322 }
323 p = match_strdup(&args[0]);
Jim Meyering3fbe5c32008-04-29 00:59:07 -0700324 if (p)
325 hsb->nls_disk = load_nls(p);
Roman Zippel328b9222005-09-06 15:18:49 -0700326 if (!hsb->nls_disk) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800327 printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p);
Roman Zippel328b9222005-09-06 15:18:49 -0700328 kfree(p);
329 return 0;
330 }
331 kfree(p);
332 break;
333 case opt_iocharset:
334 if (hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800335 printk(KERN_ERR "hfs: unable to change iocharset\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700336 return 0;
337 }
338 p = match_strdup(&args[0]);
Jim Meyering3fbe5c32008-04-29 00:59:07 -0700339 if (p)
340 hsb->nls_io = load_nls(p);
Roman Zippel328b9222005-09-06 15:18:49 -0700341 if (!hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800342 printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p);
Roman Zippel328b9222005-09-06 15:18:49 -0700343 kfree(p);
344 return 0;
345 }
346 kfree(p);
347 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 default:
349 return 0;
350 }
351 }
352
Roman Zippel328b9222005-09-06 15:18:49 -0700353 if (hsb->nls_disk && !hsb->nls_io) {
354 hsb->nls_io = load_nls_default();
355 if (!hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800356 printk(KERN_ERR "hfs: unable to load default iocharset\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700357 return 0;
358 }
359 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 hsb->s_dir_umask &= 0777;
361 hsb->s_file_umask &= 0577;
362
363 return 1;
364}
365
366/*
367 * hfs_read_super()
368 *
369 * This is the function that is responsible for mounting an HFS
370 * filesystem. It performs all the tasks necessary to get enough data
371 * from the disk to read the root inode. This includes parsing the
372 * mount options, dealing with Macintosh partitions, reading the
373 * superblock and the allocation bitmap blocks, calling
374 * hfs_btree_init() to get the necessary data about the extents and
375 * catalog B-trees and, finally, reading the root inode into memory.
376 */
377static int hfs_fill_super(struct super_block *sb, void *data, int silent)
378{
379 struct hfs_sb_info *sbi;
380 struct hfs_find_data fd;
381 hfs_cat_rec rec;
382 struct inode *root_inode;
383 int res;
384
Panagiotis Issarisf8314dc2006-09-27 01:49:37 -0700385 sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 if (!sbi)
387 return -ENOMEM;
388 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 INIT_HLIST_HEAD(&sbi->rsrc_inodes);
390
391 res = -EINVAL;
392 if (!parse_options((char *)data, sbi)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800393 printk(KERN_ERR "hfs: unable to parse mount options.\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700394 goto bail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 }
396
397 sb->s_op = &hfs_super_operations;
398 sb->s_flags |= MS_NODIRATIME;
Matthias Kaehlcke3084b722008-07-25 01:46:34 -0700399 mutex_init(&sbi->bitmap_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
401 res = hfs_mdb_get(sb);
402 if (res) {
403 if (!silent)
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800404 printk(KERN_WARNING "hfs: can't find a HFS filesystem on dev %s.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 hfs_mdb_name(sb));
406 res = -EINVAL;
Colin Leroy945b0922005-05-01 08:59:16 -0700407 goto bail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 }
409
410 /* try to get the root inode */
411 hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
412 res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
Amerigo Wangec81aec2009-12-14 17:57:37 -0800413 if (!res) {
414 if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
415 res = -EIO;
416 goto bail;
417 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
Amerigo Wangec81aec2009-12-14 17:57:37 -0800419 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 if (res) {
421 hfs_find_exit(&fd);
422 goto bail_no_root;
423 }
Eric Sandeend6ddf552006-11-16 01:19:22 -0800424 res = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
426 hfs_find_exit(&fd);
427 if (!root_inode)
428 goto bail_no_root;
429
Eric Sandeend6ddf552006-11-16 01:19:22 -0800430 res = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 sb->s_root = d_alloc_root(root_inode);
432 if (!sb->s_root)
433 goto bail_iput;
434
435 sb->s_root->d_op = &hfs_dentry_operations;
436
437 /* everything's okay */
438 return 0;
439
440bail_iput:
441 iput(root_inode);
442bail_no_root:
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800443 printk(KERN_ERR "hfs: get root inode failed.\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700444bail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 hfs_mdb_put(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 return res;
447}
448
David Howells454e2392006-06-23 02:02:57 -0700449static int hfs_get_sb(struct file_system_type *fs_type,
450 int flags, const char *dev_name, void *data,
451 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452{
David Howells454e2392006-06-23 02:02:57 -0700453 return get_sb_bdev(fs_type, flags, dev_name, data, hfs_fill_super, mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454}
455
456static struct file_system_type hfs_fs_type = {
457 .owner = THIS_MODULE,
458 .name = "hfs",
459 .get_sb = hfs_get_sb,
460 .kill_sb = kill_block_super,
461 .fs_flags = FS_REQUIRES_DEV,
462};
463
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700464static void hfs_init_once(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465{
466 struct hfs_inode_info *i = p;
467
Christoph Lametera35afb82007-05-16 22:10:57 -0700468 inode_init_once(&i->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469}
470
471static int __init init_hfs_fs(void)
472{
473 int err;
474
475 hfs_inode_cachep = kmem_cache_create("hfs_inode_cache",
476 sizeof(struct hfs_inode_info), 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900477 hfs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 if (!hfs_inode_cachep)
479 return -ENOMEM;
480 err = register_filesystem(&hfs_fs_type);
481 if (err)
482 kmem_cache_destroy(hfs_inode_cachep);
483 return err;
484}
485
486static void __exit exit_hfs_fs(void)
487{
488 unregister_filesystem(&hfs_fs_type);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700489 kmem_cache_destroy(hfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490}
491
492module_init(init_hfs_fs)
493module_exit(exit_hfs_fs)