Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/init.h> | |
12 | #include <linux/pagemap.h> | |
13 | #include <linux/fs.h> | |
1da177e4 | 14 | #include <linux/slab.h> |
1da177e4 LT |
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 | ||
fc4fff82 CH |
23 | static int hfsplus_system_read_inode(struct inode *inode) |
24 | { | |
25 | struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; | |
26 | ||
27 | switch (inode->i_ino) { | |
28 | case HFSPLUS_EXT_CNID: | |
29 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); | |
30 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
31 | break; | |
32 | case HFSPLUS_CAT_CNID: | |
33 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); | |
34 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
35 | break; | |
36 | case HFSPLUS_ALLOC_CNID: | |
37 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); | |
38 | inode->i_mapping->a_ops = &hfsplus_aops; | |
39 | break; | |
40 | case HFSPLUS_START_CNID: | |
41 | hfsplus_inode_read_fork(inode, &vhdr->start_file); | |
42 | break; | |
43 | case HFSPLUS_ATTR_CNID: | |
44 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); | |
45 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
46 | break; | |
47 | default: | |
48 | return -EIO; | |
49 | } | |
50 | ||
51 | return 0; | |
52 | } | |
53 | ||
63525391 | 54 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
55 | { |
56 | struct hfs_find_data fd; | |
63525391 | 57 | struct inode *inode; |
fc4fff82 | 58 | int err; |
63525391 DH |
59 | |
60 | inode = iget_locked(sb, ino); | |
61 | if (!inode) | |
62 | return ERR_PTR(-ENOMEM); | |
63 | if (!(inode->i_state & I_NEW)) | |
64 | return inode; | |
1da177e4 | 65 | |
6af502de CH |
66 | INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); |
67 | mutex_init(&HFSPLUS_I(inode)->extents_lock); | |
68 | HFSPLUS_I(inode)->flags = 0; | |
69 | HFSPLUS_I(inode)->rsrc_inode = NULL; | |
70 | atomic_set(&HFSPLUS_I(inode)->opencnt, 0); | |
1da177e4 | 71 | |
fc4fff82 CH |
72 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || |
73 | inode->i_ino == HFSPLUS_ROOT_CNID) { | |
dd73a01a | 74 | hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); |
1da177e4 LT |
75 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); |
76 | if (!err) | |
77 | err = hfsplus_cat_read_inode(inode, &fd); | |
78 | hfs_find_exit(&fd); | |
fc4fff82 CH |
79 | } else { |
80 | err = hfsplus_system_read_inode(inode); | |
1da177e4 | 81 | } |
fc4fff82 CH |
82 | |
83 | if (err) { | |
84 | iget_failed(inode); | |
85 | return ERR_PTR(err); | |
1da177e4 LT |
86 | } |
87 | ||
63525391 DH |
88 | unlock_new_inode(inode); |
89 | return inode; | |
1da177e4 LT |
90 | } |
91 | ||
b5080f77 | 92 | static int hfsplus_system_write_inode(struct inode *inode) |
1da177e4 | 93 | { |
dd73a01a | 94 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
b5080f77 CH |
95 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
96 | struct hfsplus_fork_raw *fork; | |
97 | struct hfs_btree *tree = NULL; | |
1da177e4 | 98 | |
1da177e4 | 99 | switch (inode->i_ino) { |
1da177e4 | 100 | case HFSPLUS_EXT_CNID: |
b5080f77 CH |
101 | fork = &vhdr->ext_file; |
102 | tree = sbi->ext_tree; | |
1da177e4 LT |
103 | break; |
104 | case HFSPLUS_CAT_CNID: | |
b5080f77 CH |
105 | fork = &vhdr->cat_file; |
106 | tree = sbi->cat_tree; | |
1da177e4 LT |
107 | break; |
108 | case HFSPLUS_ALLOC_CNID: | |
b5080f77 | 109 | fork = &vhdr->alloc_file; |
1da177e4 LT |
110 | break; |
111 | case HFSPLUS_START_CNID: | |
b5080f77 | 112 | fork = &vhdr->start_file; |
1da177e4 LT |
113 | break; |
114 | case HFSPLUS_ATTR_CNID: | |
b5080f77 CH |
115 | fork = &vhdr->attr_file; |
116 | tree = sbi->attr_tree; | |
117 | default: | |
118 | return -EIO; | |
119 | } | |
120 | ||
121 | if (fork->total_size != cpu_to_be64(inode->i_size)) { | |
84adede3 | 122 | set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); |
b5080f77 | 123 | inode->i_sb->s_dirt = 1; |
1da177e4 | 124 | } |
b5080f77 CH |
125 | hfsplus_inode_write_fork(inode, fork); |
126 | if (tree) | |
127 | hfs_btree_write(tree); | |
128 | return 0; | |
129 | } | |
130 | ||
131 | static int hfsplus_write_inode(struct inode *inode, | |
132 | struct writeback_control *wbc) | |
133 | { | |
134 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); | |
135 | ||
136 | hfsplus_ext_write_extent(inode); | |
137 | ||
138 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || | |
139 | inode->i_ino == HFSPLUS_ROOT_CNID) | |
140 | return hfsplus_cat_write_inode(inode); | |
141 | else | |
142 | return hfsplus_system_write_inode(inode); | |
1da177e4 LT |
143 | } |
144 | ||
b57922d9 | 145 | static void hfsplus_evict_inode(struct inode *inode) |
1da177e4 | 146 | { |
b57922d9 AV |
147 | dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
148 | truncate_inode_pages(&inode->i_data, 0); | |
149 | end_writeback(inode); | |
1da177e4 | 150 | if (HFSPLUS_IS_RSRC(inode)) { |
6af502de CH |
151 | HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; |
152 | iput(HFSPLUS_I(inode)->rsrc_inode); | |
1da177e4 | 153 | } |
1da177e4 LT |
154 | } |
155 | ||
b5fc510c | 156 | int hfsplus_sync_fs(struct super_block *sb, int wait) |
1da177e4 | 157 | { |
dd73a01a CH |
158 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
159 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
160 | |
161 | dprint(DBG_SUPER, "hfsplus_write_super\n"); | |
ebc1ac16 | 162 | |
7ac9fb9c | 163 | mutex_lock(&sbi->vh_mutex); |
dd73a01a | 164 | mutex_lock(&sbi->alloc_mutex); |
1da177e4 | 165 | sb->s_dirt = 0; |
1da177e4 | 166 | |
dd73a01a | 167 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
dd73a01a CH |
168 | vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); |
169 | vhdr->folder_count = cpu_to_be32(sbi->folder_count); | |
170 | vhdr->file_count = cpu_to_be32(sbi->file_count); | |
1da177e4 | 171 | |
dd73a01a | 172 | mark_buffer_dirty(sbi->s_vhbh); |
84adede3 | 173 | if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { |
dd73a01a | 174 | if (sbi->sect_count) { |
1da177e4 LT |
175 | struct buffer_head *bh; |
176 | u32 block, offset; | |
177 | ||
dd73a01a CH |
178 | block = sbi->blockoffset; |
179 | block += (sbi->sect_count - 2) >> (sb->s_blocksize_bits - 9); | |
180 | offset = ((sbi->sect_count - 2) << 9) & (sb->s_blocksize - 1); | |
181 | printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", | |
182 | sbi->blockoffset, sbi->sect_count, | |
183 | block, offset); | |
1da177e4 LT |
184 | bh = sb_bread(sb, block); |
185 | if (bh) { | |
186 | vhdr = (struct hfsplus_vh *)(bh->b_data + offset); | |
187 | if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) { | |
dd73a01a | 188 | memcpy(vhdr, sbi->s_vhdr, sizeof(*vhdr)); |
1da177e4 LT |
189 | mark_buffer_dirty(bh); |
190 | brelse(bh); | |
191 | } else | |
634725a9 | 192 | printk(KERN_WARNING "hfs: backup not found!\n"); |
1da177e4 LT |
193 | } |
194 | } | |
1da177e4 | 195 | } |
dd73a01a | 196 | mutex_unlock(&sbi->alloc_mutex); |
7ac9fb9c | 197 | mutex_unlock(&sbi->vh_mutex); |
7fbc6df0 CH |
198 | return 0; |
199 | } | |
200 | ||
201 | static void hfsplus_write_super(struct super_block *sb) | |
202 | { | |
203 | if (!(sb->s_flags & MS_RDONLY)) | |
204 | hfsplus_sync_fs(sb, 1); | |
205 | else | |
206 | sb->s_dirt = 0; | |
1da177e4 LT |
207 | } |
208 | ||
209 | static void hfsplus_put_super(struct super_block *sb) | |
210 | { | |
dd73a01a CH |
211 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
212 | ||
1da177e4 | 213 | dprint(DBG_SUPER, "hfsplus_put_super\n"); |
dd73a01a | 214 | |
945b0920 CL |
215 | if (!sb->s_fs_info) |
216 | return; | |
6cfd0148 | 217 | |
8c85e125 CH |
218 | if (sb->s_dirt) |
219 | hfsplus_write_super(sb); | |
dd73a01a CH |
220 | if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { |
221 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
222 | |
223 | vhdr->modify_date = hfsp_now2mt(); | |
224 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
225 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
dd73a01a CH |
226 | mark_buffer_dirty(sbi->s_vhbh); |
227 | sync_dirty_buffer(sbi->s_vhbh); | |
1da177e4 LT |
228 | } |
229 | ||
dd73a01a CH |
230 | hfs_btree_close(sbi->cat_tree); |
231 | hfs_btree_close(sbi->ext_tree); | |
232 | iput(sbi->alloc_file); | |
233 | iput(sbi->hidden_dir); | |
234 | brelse(sbi->s_vhbh); | |
235 | unload_nls(sbi->nls); | |
945b0920 CL |
236 | kfree(sb->s_fs_info); |
237 | sb->s_fs_info = NULL; | |
1da177e4 LT |
238 | } |
239 | ||
726c3342 | 240 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 241 | { |
726c3342 | 242 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 243 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 244 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 245 | |
1da177e4 LT |
246 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
247 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
248 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
249 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
250 | buf->f_bavail = buf->f_bfree; |
251 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 252 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
25564dd8 CL |
253 | buf->f_fsid.val[0] = (u32)id; |
254 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
255 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
261 | { | |
262 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
263 | return 0; | |
264 | if (!(*flags & MS_RDONLY)) { | |
dd73a01a | 265 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
b0b623c3 RZ |
266 | struct hfsplus_sb_info sbi; |
267 | ||
268 | memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); | |
dd73a01a | 269 | sbi.nls = HFSPLUS_SB(sb)->nls; |
b0b623c3 RZ |
270 | if (!hfsplus_parse_options(data, &sbi)) |
271 | return -EINVAL; | |
1da177e4 LT |
272 | |
273 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 | 274 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
1da177e4 LT |
275 | "running fsck.hfsplus is recommended. leaving read-only.\n"); |
276 | sb->s_flags |= MS_RDONLY; | |
277 | *flags |= MS_RDONLY; | |
84adede3 | 278 | } else if (test_bit(HFSPLUS_SB_FORCE, &sbi.flags)) { |
b0b623c3 | 279 | /* nothing */ |
1da177e4 | 280 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 281 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
1da177e4 LT |
282 | sb->s_flags |= MS_RDONLY; |
283 | *flags |= MS_RDONLY; | |
b0b623c3 | 284 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
634725a9 | 285 | printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); |
b0b623c3 RZ |
286 | sb->s_flags |= MS_RDONLY; |
287 | *flags |= MS_RDONLY; | |
1da177e4 LT |
288 | } |
289 | } | |
290 | return 0; | |
291 | } | |
292 | ||
ee9b6d61 | 293 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
294 | .alloc_inode = hfsplus_alloc_inode, |
295 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 | 296 | .write_inode = hfsplus_write_inode, |
b57922d9 | 297 | .evict_inode = hfsplus_evict_inode, |
1da177e4 LT |
298 | .put_super = hfsplus_put_super, |
299 | .write_super = hfsplus_write_super, | |
7fbc6df0 | 300 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
301 | .statfs = hfsplus_statfs, |
302 | .remount_fs = hfsplus_remount, | |
717dd80e | 303 | .show_options = hfsplus_show_options, |
1da177e4 LT |
304 | }; |
305 | ||
306 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
307 | { | |
308 | struct hfsplus_vh *vhdr; | |
309 | struct hfsplus_sb_info *sbi; | |
310 | hfsplus_cat_entry entry; | |
311 | struct hfs_find_data fd; | |
63525391 | 312 | struct inode *root, *inode; |
1da177e4 LT |
313 | struct qstr str; |
314 | struct nls_table *nls = NULL; | |
315 | int err = -EINVAL; | |
316 | ||
a5001a27 | 317 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
318 | if (!sbi) |
319 | return -ENOMEM; | |
320 | ||
1da177e4 | 321 | sb->s_fs_info = sbi; |
40bf48af | 322 | mutex_init(&sbi->alloc_mutex); |
7ac9fb9c | 323 | mutex_init(&sbi->vh_mutex); |
717dd80e RZ |
324 | hfsplus_fill_defaults(sbi); |
325 | if (!hfsplus_parse_options(data, sbi)) { | |
634725a9 | 326 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
1da177e4 LT |
327 | err = -EINVAL; |
328 | goto cleanup; | |
329 | } | |
330 | ||
331 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
332 | nls = sbi->nls; | |
333 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 334 | if (!sbi->nls) { |
634725a9 | 335 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
1da177e4 LT |
336 | err = -EINVAL; |
337 | goto cleanup; | |
338 | } | |
339 | ||
340 | /* Grab the volume header */ | |
341 | if (hfsplus_read_wrapper(sb)) { | |
342 | if (!silent) | |
634725a9 | 343 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
1da177e4 LT |
344 | err = -EINVAL; |
345 | goto cleanup; | |
346 | } | |
dd73a01a | 347 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
348 | |
349 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
350 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
351 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
352 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 353 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
1da177e4 LT |
354 | goto cleanup; |
355 | } | |
dd73a01a CH |
356 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
357 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
dd73a01a CH |
358 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); |
359 | sbi->file_count = be32_to_cpu(vhdr->file_count); | |
360 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); | |
361 | sbi->data_clump_blocks = | |
362 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; | |
363 | if (!sbi->data_clump_blocks) | |
364 | sbi->data_clump_blocks = 1; | |
365 | sbi->rsrc_clump_blocks = | |
366 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; | |
367 | if (!sbi->rsrc_clump_blocks) | |
368 | sbi->rsrc_clump_blocks = 1; | |
1da177e4 LT |
369 | |
370 | /* Set up operations so we can load metadata */ | |
371 | sb->s_op = &hfsplus_sops; | |
372 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
373 | ||
374 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 RZ |
375 | printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " |
376 | "running fsck.hfsplus is recommended. mounting read-only.\n"); | |
1da177e4 | 377 | sb->s_flags |= MS_RDONLY; |
84adede3 | 378 | } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { |
b0b623c3 | 379 | /* nothing */ |
1da177e4 | 380 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 381 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 382 | sb->s_flags |= MS_RDONLY; |
81a73719 | 383 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { |
355a4696 | 384 | printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " |
634725a9 | 385 | "use the force option at your own risk, mounting read-only.\n"); |
b0b623c3 | 386 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
387 | } |
388 | ||
389 | /* Load metadata objects (B*Trees) */ | |
dd73a01a CH |
390 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
391 | if (!sbi->ext_tree) { | |
634725a9 | 392 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
1da177e4 LT |
393 | goto cleanup; |
394 | } | |
dd73a01a CH |
395 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
396 | if (!sbi->cat_tree) { | |
634725a9 | 397 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
1da177e4 LT |
398 | goto cleanup; |
399 | } | |
400 | ||
63525391 DH |
401 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
402 | if (IS_ERR(inode)) { | |
634725a9 | 403 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 404 | err = PTR_ERR(inode); |
1da177e4 LT |
405 | goto cleanup; |
406 | } | |
dd73a01a | 407 | sbi->alloc_file = inode; |
1da177e4 LT |
408 | |
409 | /* Load the root directory */ | |
63525391 DH |
410 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
411 | if (IS_ERR(root)) { | |
412 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
413 | err = PTR_ERR(root); | |
414 | goto cleanup; | |
415 | } | |
1da177e4 LT |
416 | sb->s_root = d_alloc_root(root); |
417 | if (!sb->s_root) { | |
1da177e4 | 418 | iput(root); |
63525391 | 419 | err = -ENOMEM; |
1da177e4 LT |
420 | goto cleanup; |
421 | } | |
d45bce8f | 422 | sb->s_root->d_op = &hfsplus_dentry_operations; |
1da177e4 LT |
423 | |
424 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
425 | str.name = HFSP_HIDDENDIR_NAME; | |
dd73a01a | 426 | hfs_find_init(sbi->cat_tree, &fd); |
1da177e4 LT |
427 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
428 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
429 | hfs_find_exit(&fd); | |
430 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
431 | goto cleanup; | |
63525391 DH |
432 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
433 | if (IS_ERR(inode)) { | |
434 | err = PTR_ERR(inode); | |
1da177e4 | 435 | goto cleanup; |
63525391 | 436 | } |
dd73a01a | 437 | sbi->hidden_dir = inode; |
1da177e4 LT |
438 | } else |
439 | hfs_find_exit(&fd); | |
440 | ||
441 | if (sb->s_flags & MS_RDONLY) | |
442 | goto out; | |
443 | ||
444 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
445 | * all three are registered with Apple for our use | |
446 | */ | |
447 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
448 | vhdr->modify_date = hfsp_now2mt(); | |
20c79e78 | 449 | be32_add_cpu(&vhdr->write_count, 1); |
1da177e4 LT |
450 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
451 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
dd73a01a CH |
452 | mark_buffer_dirty(sbi->s_vhbh); |
453 | sync_dirty_buffer(sbi->s_vhbh); | |
1da177e4 | 454 | |
dd73a01a | 455 | if (!sbi->hidden_dir) { |
634725a9 | 456 | printk(KERN_DEBUG "hfs: create hidden dir...\n"); |
7ac9fb9c CH |
457 | |
458 | mutex_lock(&sbi->vh_mutex); | |
dd73a01a CH |
459 | sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
460 | hfsplus_create_cat(sbi->hidden_dir->i_ino, sb->s_root->d_inode, | |
461 | &str, sbi->hidden_dir); | |
7ac9fb9c CH |
462 | mutex_unlock(&sbi->vh_mutex); |
463 | ||
dd73a01a | 464 | mark_inode_dirty(sbi->hidden_dir); |
1da177e4 LT |
465 | } |
466 | out: | |
467 | unload_nls(sbi->nls); | |
468 | sbi->nls = nls; | |
469 | return 0; | |
470 | ||
471 | cleanup: | |
472 | hfsplus_put_super(sb); | |
6d729e44 | 473 | unload_nls(nls); |
1da177e4 LT |
474 | return err; |
475 | } | |
476 | ||
477 | MODULE_AUTHOR("Brad Boyer"); | |
478 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
479 | MODULE_LICENSE("GPL"); | |
480 | ||
e18b890b | 481 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
482 | |
483 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
484 | { | |
485 | struct hfsplus_inode_info *i; | |
486 | ||
e94b1766 | 487 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
488 | return i ? &i->vfs_inode : NULL; |
489 | } | |
490 | ||
fa0d7e3d | 491 | static void hfsplus_i_callback(struct rcu_head *head) |
1da177e4 | 492 | { |
fa0d7e3d NP |
493 | struct inode *inode = container_of(head, struct inode, i_rcu); |
494 | ||
495 | INIT_LIST_HEAD(&inode->i_dentry); | |
6af502de | 496 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
1da177e4 LT |
497 | } |
498 | ||
fa0d7e3d NP |
499 | static void hfsplus_destroy_inode(struct inode *inode) |
500 | { | |
501 | call_rcu(&inode->i_rcu, hfsplus_i_callback); | |
502 | } | |
503 | ||
1da177e4 LT |
504 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) |
505 | ||
152a0836 AV |
506 | static struct dentry *hfsplus_mount(struct file_system_type *fs_type, |
507 | int flags, const char *dev_name, void *data) | |
1da177e4 | 508 | { |
152a0836 | 509 | return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); |
1da177e4 LT |
510 | } |
511 | ||
512 | static struct file_system_type hfsplus_fs_type = { | |
513 | .owner = THIS_MODULE, | |
514 | .name = "hfsplus", | |
152a0836 | 515 | .mount = hfsplus_mount, |
1da177e4 LT |
516 | .kill_sb = kill_block_super, |
517 | .fs_flags = FS_REQUIRES_DEV, | |
518 | }; | |
519 | ||
51cc5068 | 520 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
521 | { |
522 | struct hfsplus_inode_info *i = p; | |
523 | ||
a35afb83 | 524 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
525 | } |
526 | ||
527 | static int __init init_hfsplus_fs(void) | |
528 | { | |
529 | int err; | |
530 | ||
531 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
532 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 533 | hfsplus_init_once); |
1da177e4 LT |
534 | if (!hfsplus_inode_cachep) |
535 | return -ENOMEM; | |
536 | err = register_filesystem(&hfsplus_fs_type); | |
537 | if (err) | |
538 | kmem_cache_destroy(hfsplus_inode_cachep); | |
539 | return err; | |
540 | } | |
541 | ||
542 | static void __exit exit_hfsplus_fs(void) | |
543 | { | |
544 | unregister_filesystem(&hfsplus_fs_type); | |
1a1d92c1 | 545 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
546 | } |
547 | ||
548 | module_init(init_hfsplus_fs) | |
549 | module_exit(exit_hfsplus_fs) |