blob: 8137fb3e6780343c6a7a36086547cdfba0936c0e [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>
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 Hellwig8c85e122009-04-28 18:00:26 +020081 if (sb->s_dirt)
82 hfs_write_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 hfs_mdb_close(sb);
84 /* release the MDB's resources */
85 hfs_mdb_put(sb);
86}
87
88/*
89 * hfs_statfs()
90 *
91 * This is the statfs() entry in the super_operations structure for
92 * HFS filesystems. The purpose is to return various data about the
93 * filesystem.
94 *
95 * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
96 */
David Howells726c3342006-06-23 02:02:58 -070097static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098{
David Howells726c3342006-06-23 02:02:58 -070099 struct super_block *sb = dentry->d_sb;
Coly Li7dd2c002009-04-02 16:59:35 -0700100 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
David Howells726c3342006-06-23 02:02:58 -0700101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 buf->f_type = HFS_SUPER_MAGIC;
103 buf->f_bsize = sb->s_blocksize;
104 buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
105 buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div;
106 buf->f_bavail = buf->f_bfree;
107 buf->f_files = HFS_SB(sb)->fs_ablocks;
108 buf->f_ffree = HFS_SB(sb)->free_ablocks;
Coly Li7dd2c002009-04-02 16:59:35 -0700109 buf->f_fsid.val[0] = (u32)id;
110 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 buf->f_namelen = HFS_NAMELEN;
112
113 return 0;
114}
115
116static int hfs_remount(struct super_block *sb, int *flags, char *data)
117{
118 *flags |= MS_NODIRATIME;
119 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
120 return 0;
121 if (!(*flags & MS_RDONLY)) {
122 if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800123 printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 "running fsck.hfs is recommended. leaving read-only.\n");
125 sb->s_flags |= MS_RDONLY;
126 *flags |= MS_RDONLY;
127 } else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800128 printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 sb->s_flags |= MS_RDONLY;
130 *flags |= MS_RDONLY;
131 }
132 }
133 return 0;
134}
135
Al Viro34c80b12011-12-08 21:32:45 -0500136static int hfs_show_options(struct seq_file *seq, struct dentry *root)
Roman Zippel717dd80e2005-09-06 15:18:48 -0700137{
Al Viro34c80b12011-12-08 21:32:45 -0500138 struct hfs_sb_info *sbi = HFS_SB(root->d_sb);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700139
140 if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
141 seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator);
142 if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
143 seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type);
144 seq_printf(seq, ",uid=%u,gid=%u", sbi->s_uid, sbi->s_gid);
145 if (sbi->s_file_umask != 0133)
146 seq_printf(seq, ",file_umask=%o", sbi->s_file_umask);
147 if (sbi->s_dir_umask != 0022)
148 seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask);
149 if (sbi->part >= 0)
150 seq_printf(seq, ",part=%u", sbi->part);
151 if (sbi->session >= 0)
152 seq_printf(seq, ",session=%u", sbi->session);
Roman Zippel328b9222005-09-06 15:18:49 -0700153 if (sbi->nls_disk)
154 seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
155 if (sbi->nls_io)
156 seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700157 if (sbi->s_quiet)
158 seq_printf(seq, ",quiet");
159 return 0;
160}
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162static struct inode *hfs_alloc_inode(struct super_block *sb)
163{
164 struct hfs_inode_info *i;
165
Christoph Lametere94b1762006-12-06 20:33:17 -0800166 i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 return i ? &i->vfs_inode : NULL;
168}
169
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100170static void hfs_i_callback(struct rcu_head *head)
171{
172 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100173 kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
174}
175
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176static void hfs_destroy_inode(struct inode *inode)
177{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100178 call_rcu(&inode->i_rcu, hfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179}
180
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800181static const struct super_operations hfs_super_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 .alloc_inode = hfs_alloc_inode,
183 .destroy_inode = hfs_destroy_inode,
184 .write_inode = hfs_write_inode,
Al Virob57922d2010-06-07 14:34:48 -0400185 .evict_inode = hfs_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 .put_super = hfs_put_super,
187 .write_super = hfs_write_super,
Christoph Hellwig58bc5bb2009-06-08 10:04:54 +0200188 .sync_fs = hfs_sync_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 .statfs = hfs_statfs,
190 .remount_fs = hfs_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700191 .show_options = hfs_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192};
193
194enum {
195 opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
196 opt_part, opt_session, opt_type, opt_creator, opt_quiet,
Roman Zippel328b9222005-09-06 15:18:49 -0700197 opt_codepage, opt_iocharset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 opt_err
199};
200
Steven Whitehousea447c092008-10-13 10:46:57 +0100201static const match_table_t tokens = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 { opt_uid, "uid=%u" },
203 { opt_gid, "gid=%u" },
204 { opt_umask, "umask=%o" },
205 { opt_file_umask, "file_umask=%o" },
206 { opt_dir_umask, "dir_umask=%o" },
207 { opt_part, "part=%u" },
208 { opt_session, "session=%u" },
209 { opt_type, "type=%s" },
210 { opt_creator, "creator=%s" },
211 { opt_quiet, "quiet" },
Roman Zippel328b9222005-09-06 15:18:49 -0700212 { opt_codepage, "codepage=%s" },
213 { opt_iocharset, "iocharset=%s" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 { opt_err, NULL }
215};
216
217static inline int match_fourchar(substring_t *arg, u32 *result)
218{
219 if (arg->to - arg->from != 4)
220 return -EINVAL;
221 memcpy(result, arg->from, 4);
222 return 0;
223}
224
225/*
226 * parse_options()
227 *
228 * adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger
229 * This function is called by hfs_read_super() to parse the mount options.
230 */
231static int parse_options(char *options, struct hfs_sb_info *hsb)
232{
233 char *p;
234 substring_t args[MAX_OPT_ARGS];
235 int tmp, token;
236
237 /* initialize the sb with defaults */
David Howells94c9a5e2008-11-14 10:38:54 +1100238 hsb->s_uid = current_uid();
239 hsb->s_gid = current_gid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 hsb->s_file_umask = 0133;
241 hsb->s_dir_umask = 0022;
242 hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
243 hsb->s_quiet = 0;
244 hsb->part = -1;
245 hsb->session = -1;
246
247 if (!options)
248 return 1;
249
250 while ((p = strsep(&options, ",")) != NULL) {
251 if (!*p)
252 continue;
253
254 token = match_token(p, tokens, args);
255 switch (token) {
256 case opt_uid:
257 if (match_int(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800258 printk(KERN_ERR "hfs: uid requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 return 0;
260 }
261 hsb->s_uid = (uid_t)tmp;
262 break;
263 case opt_gid:
264 if (match_int(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800265 printk(KERN_ERR "hfs: gid requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 return 0;
267 }
268 hsb->s_gid = (gid_t)tmp;
269 break;
270 case opt_umask:
271 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800272 printk(KERN_ERR "hfs: umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 return 0;
274 }
275 hsb->s_file_umask = (umode_t)tmp;
276 hsb->s_dir_umask = (umode_t)tmp;
277 break;
278 case opt_file_umask:
279 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800280 printk(KERN_ERR "hfs: file_umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 return 0;
282 }
283 hsb->s_file_umask = (umode_t)tmp;
284 break;
285 case opt_dir_umask:
286 if (match_octal(&args[0], &tmp)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800287 printk(KERN_ERR "hfs: dir_umask requires a value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 return 0;
289 }
290 hsb->s_dir_umask = (umode_t)tmp;
291 break;
292 case opt_part:
293 if (match_int(&args[0], &hsb->part)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800294 printk(KERN_ERR "hfs: part requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 return 0;
296 }
297 break;
298 case opt_session:
299 if (match_int(&args[0], &hsb->session)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800300 printk(KERN_ERR "hfs: session requires an argument\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 return 0;
302 }
303 break;
304 case opt_type:
305 if (match_fourchar(&args[0], &hsb->s_type)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800306 printk(KERN_ERR "hfs: type requires a 4 character value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 return 0;
308 }
309 break;
310 case opt_creator:
311 if (match_fourchar(&args[0], &hsb->s_creator)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800312 printk(KERN_ERR "hfs: creator requires a 4 character value\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 return 0;
314 }
315 break;
316 case opt_quiet:
317 hsb->s_quiet = 1;
318 break;
Roman Zippel328b9222005-09-06 15:18:49 -0700319 case opt_codepage:
320 if (hsb->nls_disk) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800321 printk(KERN_ERR "hfs: unable to change codepage\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700322 return 0;
323 }
324 p = match_strdup(&args[0]);
Jim Meyering3fbe5c32008-04-29 00:59:07 -0700325 if (p)
326 hsb->nls_disk = load_nls(p);
Roman Zippel328b9222005-09-06 15:18:49 -0700327 if (!hsb->nls_disk) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800328 printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p);
Roman Zippel328b9222005-09-06 15:18:49 -0700329 kfree(p);
330 return 0;
331 }
332 kfree(p);
333 break;
334 case opt_iocharset:
335 if (hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800336 printk(KERN_ERR "hfs: unable to change iocharset\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700337 return 0;
338 }
339 p = match_strdup(&args[0]);
Jim Meyering3fbe5c32008-04-29 00:59:07 -0700340 if (p)
341 hsb->nls_io = load_nls(p);
Roman Zippel328b9222005-09-06 15:18:49 -0700342 if (!hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800343 printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p);
Roman Zippel328b9222005-09-06 15:18:49 -0700344 kfree(p);
345 return 0;
346 }
347 kfree(p);
348 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 default:
350 return 0;
351 }
352 }
353
Roman Zippel328b9222005-09-06 15:18:49 -0700354 if (hsb->nls_disk && !hsb->nls_io) {
355 hsb->nls_io = load_nls_default();
356 if (!hsb->nls_io) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800357 printk(KERN_ERR "hfs: unable to load default iocharset\n");
Roman Zippel328b9222005-09-06 15:18:49 -0700358 return 0;
359 }
360 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 hsb->s_dir_umask &= 0777;
362 hsb->s_file_umask &= 0577;
363
364 return 1;
365}
366
367/*
368 * hfs_read_super()
369 *
370 * This is the function that is responsible for mounting an HFS
371 * filesystem. It performs all the tasks necessary to get enough data
372 * from the disk to read the root inode. This includes parsing the
373 * mount options, dealing with Macintosh partitions, reading the
374 * superblock and the allocation bitmap blocks, calling
375 * hfs_btree_init() to get the necessary data about the extents and
376 * catalog B-trees and, finally, reading the root inode into memory.
377 */
378static int hfs_fill_super(struct super_block *sb, void *data, int silent)
379{
380 struct hfs_sb_info *sbi;
381 struct hfs_find_data fd;
382 hfs_cat_rec rec;
383 struct inode *root_inode;
384 int res;
385
Panagiotis Issarisf8314dc2006-09-27 01:49:37 -0700386 sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
Jan Blunck8526fb32010-02-24 13:25:30 +0100387 if (!sbi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 return -ENOMEM;
Jan Blunck8526fb32010-02-24 13:25:30 +0100389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392 res = -EINVAL;
393 if (!parse_options((char *)data, sbi)) {
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800394 printk(KERN_ERR "hfs: unable to parse mount options.\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700395 goto bail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 }
397
398 sb->s_op = &hfs_super_operations;
399 sb->s_flags |= MS_NODIRATIME;
Matthias Kaehlcke3084b722008-07-25 01:46:34 -0700400 mutex_init(&sbi->bitmap_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
402 res = hfs_mdb_get(sb);
403 if (res) {
404 if (!silent)
Roman Zippel7cf3cc32006-01-18 17:43:07 -0800405 printk(KERN_WARNING "hfs: can't find a HFS filesystem on dev %s.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 hfs_mdb_name(sb));
407 res = -EINVAL;
Colin Leroy945b0922005-05-01 08:59:16 -0700408 goto bail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 }
410
411 /* try to get the root inode */
412 hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
413 res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
Amerigo Wangec81aec2009-12-14 17:57:37 -0800414 if (!res) {
415 if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
416 res = -EIO;
417 goto bail;
418 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
Amerigo Wangec81aec2009-12-14 17:57:37 -0800420 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (res) {
422 hfs_find_exit(&fd);
423 goto bail_no_root;
424 }
Eric Sandeend6ddf552006-11-16 01:19:22 -0800425 res = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
427 hfs_find_exit(&fd);
428 if (!root_inode)
429 goto bail_no_root;
430
Al Viro518c79d2010-12-18 11:19:14 -0500431 sb->s_d_op = &hfs_dentry_operations;
Eric Sandeend6ddf552006-11-16 01:19:22 -0800432 res = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 sb->s_root = d_alloc_root(root_inode);
434 if (!sb->s_root)
435 goto bail_iput;
436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 /* 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
Al Viro152a0832010-07-25 00:46:55 +0400449static struct dentry *hfs_mount(struct file_system_type *fs_type,
450 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{
Al Viro152a0832010-07-25 00:46:55 +0400452 return mount_bdev(fs_type, flags, dev_name, data, hfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453}
454
455static struct file_system_type hfs_fs_type = {
456 .owner = THIS_MODULE,
457 .name = "hfs",
Al Viro152a0832010-07-25 00:46:55 +0400458 .mount = hfs_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 .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)