blob: 0f513c6bf8434adfc311c57e6829e9b3c23663e6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/pagemap.h>
13#include <linux/fs.h>
14#include <linux/sched.h>
15#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/vfs.h>
17#include <linux/nls.h>
18
19static struct inode *hfsplus_alloc_inode(struct super_block *sb);
20static void hfsplus_destroy_inode(struct inode *inode);
21
22#include "hfsplus_fs.h"
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024static void hfsplus_read_inode(struct inode *inode)
25{
26 struct hfs_find_data fd;
27 struct hfsplus_vh *vhdr;
28 int err;
29
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
31 init_MUTEX(&HFSPLUS_I(inode).extents_lock);
32 HFSPLUS_I(inode).flags = 0;
33 HFSPLUS_I(inode).rsrc_inode = NULL;
Peter Wainwright94c1d312005-10-26 01:59:02 -070034 atomic_set(&HFSPLUS_I(inode).opencnt, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
37 read_inode:
38 hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd);
39 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
40 if (!err)
41 err = hfsplus_cat_read_inode(inode, &fd);
42 hfs_find_exit(&fd);
43 if (err)
44 goto bad_inode;
45 return;
46 }
47 vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
48 switch(inode->i_ino) {
49 case HFSPLUS_ROOT_CNID:
50 goto read_inode;
51 case HFSPLUS_EXT_CNID:
52 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
53 inode->i_mapping->a_ops = &hfsplus_btree_aops;
54 break;
55 case HFSPLUS_CAT_CNID:
56 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
57 inode->i_mapping->a_ops = &hfsplus_btree_aops;
58 break;
59 case HFSPLUS_ALLOC_CNID:
60 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
61 inode->i_mapping->a_ops = &hfsplus_aops;
62 break;
63 case HFSPLUS_START_CNID:
64 hfsplus_inode_read_fork(inode, &vhdr->start_file);
65 break;
66 case HFSPLUS_ATTR_CNID:
67 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
68 inode->i_mapping->a_ops = &hfsplus_btree_aops;
69 break;
70 default:
71 goto bad_inode;
72 }
73
74 return;
75
76 bad_inode:
77 make_bad_inode(inode);
78}
79
80static int hfsplus_write_inode(struct inode *inode, int unused)
81{
82 struct hfsplus_vh *vhdr;
83 int ret = 0;
84
85 dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
86 hfsplus_ext_write_extent(inode);
87 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
88 return hfsplus_cat_write_inode(inode);
89 }
90 vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr;
91 switch (inode->i_ino) {
92 case HFSPLUS_ROOT_CNID:
93 ret = hfsplus_cat_write_inode(inode);
94 break;
95 case HFSPLUS_EXT_CNID:
96 if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) {
97 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
98 inode->i_sb->s_dirt = 1;
99 }
100 hfsplus_inode_write_fork(inode, &vhdr->ext_file);
101 hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree);
102 break;
103 case HFSPLUS_CAT_CNID:
104 if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) {
105 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
106 inode->i_sb->s_dirt = 1;
107 }
108 hfsplus_inode_write_fork(inode, &vhdr->cat_file);
109 hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree);
110 break;
111 case HFSPLUS_ALLOC_CNID:
112 if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) {
113 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
114 inode->i_sb->s_dirt = 1;
115 }
116 hfsplus_inode_write_fork(inode, &vhdr->alloc_file);
117 break;
118 case HFSPLUS_START_CNID:
119 if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) {
120 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
121 inode->i_sb->s_dirt = 1;
122 }
123 hfsplus_inode_write_fork(inode, &vhdr->start_file);
124 break;
125 case HFSPLUS_ATTR_CNID:
126 if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) {
127 HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP;
128 inode->i_sb->s_dirt = 1;
129 }
130 hfsplus_inode_write_fork(inode, &vhdr->attr_file);
131 hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree);
132 break;
133 }
134 return ret;
135}
136
137static void hfsplus_clear_inode(struct inode *inode)
138{
139 dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 if (HFSPLUS_IS_RSRC(inode)) {
141 HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL;
142 iput(HFSPLUS_I(inode).rsrc_inode);
143 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144}
145
146static void hfsplus_write_super(struct super_block *sb)
147{
148 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
149
150 dprint(DBG_SUPER, "hfsplus_write_super\n");
151 sb->s_dirt = 0;
152 if (sb->s_flags & MS_RDONLY)
153 /* warn? */
154 return;
155
156 vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
157 vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
158 vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid);
159 vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count);
160 vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count);
161
162 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
163 if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) {
164 if (HFSPLUS_SB(sb).sect_count) {
165 struct buffer_head *bh;
166 u32 block, offset;
167
168 block = HFSPLUS_SB(sb).blockoffset;
169 block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9);
170 offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1);
Roman Zippel634725a2006-01-18 17:43:05 -0800171 printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 HFSPLUS_SB(sb).sect_count, block, offset);
173 bh = sb_bread(sb, block);
174 if (bh) {
175 vhdr = (struct hfsplus_vh *)(bh->b_data + offset);
176 if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) {
177 memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr));
178 mark_buffer_dirty(bh);
179 brelse(bh);
180 } else
Roman Zippel634725a2006-01-18 17:43:05 -0800181 printk(KERN_WARNING "hfs: backup not found!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 }
183 }
184 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
185 }
186}
187
188static void hfsplus_put_super(struct super_block *sb)
189{
190 dprint(DBG_SUPER, "hfsplus_put_super\n");
Colin Leroy945b0922005-05-01 08:59:16 -0700191 if (!sb->s_fs_info)
192 return;
193 if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
195
196 vhdr->modify_date = hfsp_now2mt();
197 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
198 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
199 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
Jan Karae39f07c2005-09-06 15:19:16 -0700200 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 }
202
203 hfs_btree_close(HFSPLUS_SB(sb).cat_tree);
204 hfs_btree_close(HFSPLUS_SB(sb).ext_tree);
205 iput(HFSPLUS_SB(sb).alloc_file);
206 iput(HFSPLUS_SB(sb).hidden_dir);
207 brelse(HFSPLUS_SB(sb).s_vhbh);
208 if (HFSPLUS_SB(sb).nls)
209 unload_nls(HFSPLUS_SB(sb).nls);
Colin Leroy945b0922005-05-01 08:59:16 -0700210 kfree(sb->s_fs_info);
211 sb->s_fs_info = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
213
David Howells726c3342006-06-23 02:02:58 -0700214static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
David Howells726c3342006-06-23 02:02:58 -0700216 struct super_block *sb = dentry->d_sb;
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 buf->f_type = HFSPLUS_SUPER_MAGIC;
219 buf->f_bsize = sb->s_blocksize;
220 buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
221 buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift;
222 buf->f_bavail = buf->f_bfree;
223 buf->f_files = 0xFFFFFFFF;
224 buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid;
225 buf->f_namelen = HFSPLUS_MAX_STRLEN;
226
227 return 0;
228}
229
230static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
231{
232 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
233 return 0;
234 if (!(*flags & MS_RDONLY)) {
235 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800236 struct hfsplus_sb_info sbi;
237
238 memset(&sbi, 0, sizeof(struct hfsplus_sb_info));
239 sbi.nls = HFSPLUS_SB(sb).nls;
240 if (!hfsplus_parse_options(data, &sbi))
241 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Roman Zippel634725a2006-01-18 17:43:05 -0800244 printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 "running fsck.hfsplus is recommended. leaving read-only.\n");
246 sb->s_flags |= MS_RDONLY;
247 *flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800248 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
249 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800251 printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 sb->s_flags |= MS_RDONLY;
253 *flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800254 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800255 printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800256 sb->s_flags |= MS_RDONLY;
257 *flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 }
259 }
260 return 0;
261}
262
263static struct super_operations hfsplus_sops = {
264 .alloc_inode = hfsplus_alloc_inode,
265 .destroy_inode = hfsplus_destroy_inode,
266 .read_inode = hfsplus_read_inode,
267 .write_inode = hfsplus_write_inode,
268 .clear_inode = hfsplus_clear_inode,
269 .put_super = hfsplus_put_super,
270 .write_super = hfsplus_write_super,
271 .statfs = hfsplus_statfs,
272 .remount_fs = hfsplus_remount,
Roman Zippel717dd80e2005-09-06 15:18:48 -0700273 .show_options = hfsplus_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274};
275
276static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
277{
278 struct hfsplus_vh *vhdr;
279 struct hfsplus_sb_info *sbi;
280 hfsplus_cat_entry entry;
281 struct hfs_find_data fd;
282 struct inode *root;
283 struct qstr str;
284 struct nls_table *nls = NULL;
285 int err = -EINVAL;
286
287 sbi = kmalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL);
288 if (!sbi)
289 return -ENOMEM;
290
291 memset(sbi, 0, sizeof(HFSPLUS_SB(sb)));
292 sb->s_fs_info = sbi;
293 INIT_HLIST_HEAD(&sbi->rsrc_inodes);
Roman Zippel717dd80e2005-09-06 15:18:48 -0700294 hfsplus_fill_defaults(sbi);
295 if (!hfsplus_parse_options(data, sbi)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800296 printk(KERN_ERR "hfs: unable to parse mount options\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 err = -EINVAL;
298 goto cleanup;
299 }
300
301 /* temporarily use utf8 to correctly find the hidden dir below */
302 nls = sbi->nls;
303 sbi->nls = load_nls("utf8");
Joshua Kwanbd6a59b2006-01-06 00:09:45 -0800304 if (!sbi->nls) {
Roman Zippel634725a2006-01-18 17:43:05 -0800305 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 err = -EINVAL;
307 goto cleanup;
308 }
309
310 /* Grab the volume header */
311 if (hfsplus_read_wrapper(sb)) {
312 if (!silent)
Roman Zippel634725a2006-01-18 17:43:05 -0800313 printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 err = -EINVAL;
315 goto cleanup;
316 }
317 vhdr = HFSPLUS_SB(sb).s_vhdr;
318
319 /* Copy parts of the volume header into the superblock */
David Elliott2179d372006-01-18 17:43:08 -0800320 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
321 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
322 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
Roman Zippel634725a2006-01-18 17:43:05 -0800323 printk(KERN_ERR "hfs: wrong filesystem version\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 goto cleanup;
325 }
326 HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks);
327 HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks);
328 HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc);
329 HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid);
330 HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count);
331 HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count);
332 HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
333 if (!HFSPLUS_SB(sb).data_clump_blocks)
334 HFSPLUS_SB(sb).data_clump_blocks = 1;
335 HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift;
336 if (!HFSPLUS_SB(sb).rsrc_clump_blocks)
337 HFSPLUS_SB(sb).rsrc_clump_blocks = 1;
338
339 /* Set up operations so we can load metadata */
340 sb->s_op = &hfsplus_sops;
341 sb->s_maxbytes = MAX_LFS_FILESIZE;
342
343 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
Roman Zippel634725a2006-01-18 17:43:05 -0800344 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
345 "running fsck.hfsplus is recommended. mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 sb->s_flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800347 } else if (sbi->flags & HFSPLUS_SB_FORCE) {
348 /* nothing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800350 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 sb->s_flags |= MS_RDONLY;
Roman Zippelb0b623c2005-11-29 19:34:41 -0800352 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
Roman Zippel634725a2006-01-18 17:43:05 -0800353 printk(KERN_WARNING "hfs: write access to a jounaled filesystem is not supported, "
354 "use the force option at your own risk, mounting read-only.\n");
Roman Zippelb0b623c2005-11-29 19:34:41 -0800355 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 }
Roman Zippelb0b623c2005-11-29 19:34:41 -0800357 sbi->flags &= ~HFSPLUS_SB_FORCE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
359 /* Load metadata objects (B*Trees) */
360 HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
361 if (!HFSPLUS_SB(sb).ext_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800362 printk(KERN_ERR "hfs: failed to load extents file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 goto cleanup;
364 }
365 HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
366 if (!HFSPLUS_SB(sb).cat_tree) {
Roman Zippel634725a2006-01-18 17:43:05 -0800367 printk(KERN_ERR "hfs: failed to load catalog file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 goto cleanup;
369 }
370
371 HFSPLUS_SB(sb).alloc_file = iget(sb, HFSPLUS_ALLOC_CNID);
372 if (!HFSPLUS_SB(sb).alloc_file) {
Roman Zippel634725a2006-01-18 17:43:05 -0800373 printk(KERN_ERR "hfs: failed to load allocation file\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 goto cleanup;
375 }
376
377 /* Load the root directory */
378 root = iget(sb, HFSPLUS_ROOT_CNID);
379 sb->s_root = d_alloc_root(root);
380 if (!sb->s_root) {
Roman Zippel634725a2006-01-18 17:43:05 -0800381 printk(KERN_ERR "hfs: failed to load root directory\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 iput(root);
383 goto cleanup;
384 }
385
386 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
387 str.name = HFSP_HIDDENDIR_NAME;
388 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
389 hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
390 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
391 hfs_find_exit(&fd);
392 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
393 goto cleanup;
394 HFSPLUS_SB(sb).hidden_dir = iget(sb, be32_to_cpu(entry.folder.id));
395 if (!HFSPLUS_SB(sb).hidden_dir)
396 goto cleanup;
397 } else
398 hfs_find_exit(&fd);
399
400 if (sb->s_flags & MS_RDONLY)
401 goto out;
402
403 /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
404 * all three are registered with Apple for our use
405 */
406 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
407 vhdr->modify_date = hfsp_now2mt();
408 vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1);
409 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
410 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
411 mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh);
Jan Karae39f07c2005-09-06 15:19:16 -0700412 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414 if (!HFSPLUS_SB(sb).hidden_dir) {
Roman Zippel634725a2006-01-18 17:43:05 -0800415 printk(KERN_DEBUG "hfs: create hidden dir...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
417 hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode,
418 &str, HFSPLUS_SB(sb).hidden_dir);
419 mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir);
420 }
421out:
422 unload_nls(sbi->nls);
423 sbi->nls = nls;
424 return 0;
425
426cleanup:
427 hfsplus_put_super(sb);
428 if (nls)
429 unload_nls(nls);
430 return err;
431}
432
433MODULE_AUTHOR("Brad Boyer");
434MODULE_DESCRIPTION("Extended Macintosh Filesystem");
435MODULE_LICENSE("GPL");
436
Christoph Lametere18b8902006-12-06 20:33:20 -0800437static struct kmem_cache *hfsplus_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439static struct inode *hfsplus_alloc_inode(struct super_block *sb)
440{
441 struct hfsplus_inode_info *i;
442
Christoph Lametere94b1762006-12-06 20:33:17 -0800443 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 return i ? &i->vfs_inode : NULL;
445}
446
447static void hfsplus_destroy_inode(struct inode *inode)
448{
449 kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
450}
451
452#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
453
David Howells454e2392006-06-23 02:02:57 -0700454static int hfsplus_get_sb(struct file_system_type *fs_type,
455 int flags, const char *dev_name, void *data,
456 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457{
David Howells454e2392006-06-23 02:02:57 -0700458 return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
459 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460}
461
462static struct file_system_type hfsplus_fs_type = {
463 .owner = THIS_MODULE,
464 .name = "hfsplus",
465 .get_sb = hfsplus_get_sb,
466 .kill_sb = kill_block_super,
467 .fs_flags = FS_REQUIRES_DEV,
468};
469
Christoph Lametere18b8902006-12-06 20:33:20 -0800470static void hfsplus_init_once(void *p, struct kmem_cache *cachep, unsigned long flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
472 struct hfsplus_inode_info *i = p;
473
474 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR)
475 inode_init_once(&i->vfs_inode);
476}
477
478static int __init init_hfsplus_fs(void)
479{
480 int err;
481
482 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
483 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
484 hfsplus_init_once, NULL);
485 if (!hfsplus_inode_cachep)
486 return -ENOMEM;
487 err = register_filesystem(&hfsplus_fs_type);
488 if (err)
489 kmem_cache_destroy(hfsplus_inode_cachep);
490 return err;
491}
492
493static void __exit exit_hfsplus_fs(void)
494{
495 unregister_filesystem(&hfsplus_fs_type);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700496 kmem_cache_destroy(hfsplus_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497}
498
499module_init(init_hfsplus_fs)
500module_exit(exit_hfsplus_fs)