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Commit | Line | Data |
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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)) { | |
122 | sbi->flags |= HFSPLUS_SB_WRITEBACKUP; | |
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 CH |
172 | mark_buffer_dirty(sbi->s_vhbh); |
173 | if (sbi->flags & HFSPLUS_SB_WRITEBACKUP) { | |
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 | } | |
dd73a01a | 195 | sbi->flags &= ~HFSPLUS_SB_WRITEBACKUP; |
1da177e4 | 196 | } |
dd73a01a | 197 | mutex_unlock(&sbi->alloc_mutex); |
7ac9fb9c | 198 | mutex_unlock(&sbi->vh_mutex); |
7fbc6df0 CH |
199 | return 0; |
200 | } | |
201 | ||
202 | static void hfsplus_write_super(struct super_block *sb) | |
203 | { | |
204 | if (!(sb->s_flags & MS_RDONLY)) | |
205 | hfsplus_sync_fs(sb, 1); | |
206 | else | |
207 | sb->s_dirt = 0; | |
1da177e4 LT |
208 | } |
209 | ||
210 | static void hfsplus_put_super(struct super_block *sb) | |
211 | { | |
dd73a01a CH |
212 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
213 | ||
1da177e4 | 214 | dprint(DBG_SUPER, "hfsplus_put_super\n"); |
dd73a01a | 215 | |
945b0920 CL |
216 | if (!sb->s_fs_info) |
217 | return; | |
6cfd0148 | 218 | |
8c85e125 CH |
219 | if (sb->s_dirt) |
220 | hfsplus_write_super(sb); | |
dd73a01a CH |
221 | if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { |
222 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
223 | |
224 | vhdr->modify_date = hfsp_now2mt(); | |
225 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
226 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
dd73a01a CH |
227 | mark_buffer_dirty(sbi->s_vhbh); |
228 | sync_dirty_buffer(sbi->s_vhbh); | |
1da177e4 LT |
229 | } |
230 | ||
dd73a01a CH |
231 | hfs_btree_close(sbi->cat_tree); |
232 | hfs_btree_close(sbi->ext_tree); | |
233 | iput(sbi->alloc_file); | |
234 | iput(sbi->hidden_dir); | |
235 | brelse(sbi->s_vhbh); | |
236 | unload_nls(sbi->nls); | |
945b0920 CL |
237 | kfree(sb->s_fs_info); |
238 | sb->s_fs_info = NULL; | |
1da177e4 LT |
239 | } |
240 | ||
726c3342 | 241 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 242 | { |
726c3342 | 243 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 244 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 245 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 246 | |
1da177e4 LT |
247 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
248 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
249 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
250 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
251 | buf->f_bavail = buf->f_bfree; |
252 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 253 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
25564dd8 CL |
254 | buf->f_fsid.val[0] = (u32)id; |
255 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
256 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
262 | { | |
263 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
264 | return 0; | |
265 | if (!(*flags & MS_RDONLY)) { | |
dd73a01a | 266 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
b0b623c3 RZ |
267 | struct hfsplus_sb_info sbi; |
268 | ||
269 | memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); | |
dd73a01a | 270 | sbi.nls = HFSPLUS_SB(sb)->nls; |
b0b623c3 RZ |
271 | if (!hfsplus_parse_options(data, &sbi)) |
272 | return -EINVAL; | |
1da177e4 LT |
273 | |
274 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 | 275 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
1da177e4 LT |
276 | "running fsck.hfsplus is recommended. leaving read-only.\n"); |
277 | sb->s_flags |= MS_RDONLY; | |
278 | *flags |= MS_RDONLY; | |
b0b623c3 RZ |
279 | } else if (sbi.flags & HFSPLUS_SB_FORCE) { |
280 | /* nothing */ | |
1da177e4 | 281 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 282 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
1da177e4 LT |
283 | sb->s_flags |= MS_RDONLY; |
284 | *flags |= MS_RDONLY; | |
b0b623c3 | 285 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
634725a9 | 286 | printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); |
b0b623c3 RZ |
287 | sb->s_flags |= MS_RDONLY; |
288 | *flags |= MS_RDONLY; | |
1da177e4 LT |
289 | } |
290 | } | |
291 | return 0; | |
292 | } | |
293 | ||
ee9b6d61 | 294 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
295 | .alloc_inode = hfsplus_alloc_inode, |
296 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 | 297 | .write_inode = hfsplus_write_inode, |
b57922d9 | 298 | .evict_inode = hfsplus_evict_inode, |
1da177e4 LT |
299 | .put_super = hfsplus_put_super, |
300 | .write_super = hfsplus_write_super, | |
7fbc6df0 | 301 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
302 | .statfs = hfsplus_statfs, |
303 | .remount_fs = hfsplus_remount, | |
717dd80e | 304 | .show_options = hfsplus_show_options, |
1da177e4 LT |
305 | }; |
306 | ||
307 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
308 | { | |
309 | struct hfsplus_vh *vhdr; | |
310 | struct hfsplus_sb_info *sbi; | |
311 | hfsplus_cat_entry entry; | |
312 | struct hfs_find_data fd; | |
63525391 | 313 | struct inode *root, *inode; |
1da177e4 LT |
314 | struct qstr str; |
315 | struct nls_table *nls = NULL; | |
316 | int err = -EINVAL; | |
317 | ||
a5001a27 | 318 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
319 | if (!sbi) |
320 | return -ENOMEM; | |
321 | ||
1da177e4 | 322 | sb->s_fs_info = sbi; |
40bf48af | 323 | mutex_init(&sbi->alloc_mutex); |
7ac9fb9c | 324 | mutex_init(&sbi->vh_mutex); |
717dd80e RZ |
325 | hfsplus_fill_defaults(sbi); |
326 | if (!hfsplus_parse_options(data, sbi)) { | |
634725a9 | 327 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
1da177e4 LT |
328 | err = -EINVAL; |
329 | goto cleanup; | |
330 | } | |
331 | ||
332 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
333 | nls = sbi->nls; | |
334 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 335 | if (!sbi->nls) { |
634725a9 | 336 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
1da177e4 LT |
337 | err = -EINVAL; |
338 | goto cleanup; | |
339 | } | |
340 | ||
341 | /* Grab the volume header */ | |
342 | if (hfsplus_read_wrapper(sb)) { | |
343 | if (!silent) | |
634725a9 | 344 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
1da177e4 LT |
345 | err = -EINVAL; |
346 | goto cleanup; | |
347 | } | |
dd73a01a | 348 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
349 | |
350 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
351 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
352 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
353 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 354 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
1da177e4 LT |
355 | goto cleanup; |
356 | } | |
dd73a01a CH |
357 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
358 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
dd73a01a CH |
359 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); |
360 | sbi->file_count = be32_to_cpu(vhdr->file_count); | |
361 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); | |
362 | sbi->data_clump_blocks = | |
363 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; | |
364 | if (!sbi->data_clump_blocks) | |
365 | sbi->data_clump_blocks = 1; | |
366 | sbi->rsrc_clump_blocks = | |
367 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; | |
368 | if (!sbi->rsrc_clump_blocks) | |
369 | sbi->rsrc_clump_blocks = 1; | |
1da177e4 LT |
370 | |
371 | /* Set up operations so we can load metadata */ | |
372 | sb->s_op = &hfsplus_sops; | |
373 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
374 | ||
375 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 RZ |
376 | printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " |
377 | "running fsck.hfsplus is recommended. mounting read-only.\n"); | |
1da177e4 | 378 | sb->s_flags |= MS_RDONLY; |
b0b623c3 RZ |
379 | } else if (sbi->flags & HFSPLUS_SB_FORCE) { |
380 | /* nothing */ | |
1da177e4 | 381 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 382 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 383 | sb->s_flags |= MS_RDONLY; |
81a73719 | 384 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { |
355a4696 | 385 | printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " |
634725a9 | 386 | "use the force option at your own risk, mounting read-only.\n"); |
b0b623c3 | 387 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 388 | } |
b0b623c3 | 389 | sbi->flags &= ~HFSPLUS_SB_FORCE; |
1da177e4 LT |
390 | |
391 | /* Load metadata objects (B*Trees) */ | |
dd73a01a CH |
392 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
393 | if (!sbi->ext_tree) { | |
634725a9 | 394 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
1da177e4 LT |
395 | goto cleanup; |
396 | } | |
dd73a01a CH |
397 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
398 | if (!sbi->cat_tree) { | |
634725a9 | 399 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
1da177e4 LT |
400 | goto cleanup; |
401 | } | |
402 | ||
63525391 DH |
403 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
404 | if (IS_ERR(inode)) { | |
634725a9 | 405 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 406 | err = PTR_ERR(inode); |
1da177e4 LT |
407 | goto cleanup; |
408 | } | |
dd73a01a | 409 | sbi->alloc_file = inode; |
1da177e4 LT |
410 | |
411 | /* Load the root directory */ | |
63525391 DH |
412 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
413 | if (IS_ERR(root)) { | |
414 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
415 | err = PTR_ERR(root); | |
416 | goto cleanup; | |
417 | } | |
1da177e4 LT |
418 | sb->s_root = d_alloc_root(root); |
419 | if (!sb->s_root) { | |
1da177e4 | 420 | iput(root); |
63525391 | 421 | err = -ENOMEM; |
1da177e4 LT |
422 | goto cleanup; |
423 | } | |
d45bce8f | 424 | sb->s_root->d_op = &hfsplus_dentry_operations; |
1da177e4 LT |
425 | |
426 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
427 | str.name = HFSP_HIDDENDIR_NAME; | |
dd73a01a | 428 | hfs_find_init(sbi->cat_tree, &fd); |
1da177e4 LT |
429 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
430 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
431 | hfs_find_exit(&fd); | |
432 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
433 | goto cleanup; | |
63525391 DH |
434 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
435 | if (IS_ERR(inode)) { | |
436 | err = PTR_ERR(inode); | |
1da177e4 | 437 | goto cleanup; |
63525391 | 438 | } |
dd73a01a | 439 | sbi->hidden_dir = inode; |
1da177e4 LT |
440 | } else |
441 | hfs_find_exit(&fd); | |
442 | ||
443 | if (sb->s_flags & MS_RDONLY) | |
444 | goto out; | |
445 | ||
446 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
447 | * all three are registered with Apple for our use | |
448 | */ | |
449 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
450 | vhdr->modify_date = hfsp_now2mt(); | |
20c79e78 | 451 | be32_add_cpu(&vhdr->write_count, 1); |
1da177e4 LT |
452 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
453 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
dd73a01a CH |
454 | mark_buffer_dirty(sbi->s_vhbh); |
455 | sync_dirty_buffer(sbi->s_vhbh); | |
1da177e4 | 456 | |
dd73a01a | 457 | if (!sbi->hidden_dir) { |
634725a9 | 458 | printk(KERN_DEBUG "hfs: create hidden dir...\n"); |
7ac9fb9c CH |
459 | |
460 | mutex_lock(&sbi->vh_mutex); | |
dd73a01a CH |
461 | sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
462 | hfsplus_create_cat(sbi->hidden_dir->i_ino, sb->s_root->d_inode, | |
463 | &str, sbi->hidden_dir); | |
7ac9fb9c CH |
464 | mutex_unlock(&sbi->vh_mutex); |
465 | ||
dd73a01a | 466 | mark_inode_dirty(sbi->hidden_dir); |
1da177e4 LT |
467 | } |
468 | out: | |
469 | unload_nls(sbi->nls); | |
470 | sbi->nls = nls; | |
471 | return 0; | |
472 | ||
473 | cleanup: | |
474 | hfsplus_put_super(sb); | |
6d729e44 | 475 | unload_nls(nls); |
1da177e4 LT |
476 | return err; |
477 | } | |
478 | ||
479 | MODULE_AUTHOR("Brad Boyer"); | |
480 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
481 | MODULE_LICENSE("GPL"); | |
482 | ||
e18b890b | 483 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
484 | |
485 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
486 | { | |
487 | struct hfsplus_inode_info *i; | |
488 | ||
e94b1766 | 489 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
490 | return i ? &i->vfs_inode : NULL; |
491 | } | |
492 | ||
493 | static void hfsplus_destroy_inode(struct inode *inode) | |
494 | { | |
6af502de | 495 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
1da177e4 LT |
496 | } |
497 | ||
498 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
499 | ||
454e2398 DH |
500 | static int hfsplus_get_sb(struct file_system_type *fs_type, |
501 | int flags, const char *dev_name, void *data, | |
502 | struct vfsmount *mnt) | |
1da177e4 | 503 | { |
454e2398 DH |
504 | return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super, |
505 | mnt); | |
1da177e4 LT |
506 | } |
507 | ||
508 | static struct file_system_type hfsplus_fs_type = { | |
509 | .owner = THIS_MODULE, | |
510 | .name = "hfsplus", | |
511 | .get_sb = hfsplus_get_sb, | |
512 | .kill_sb = kill_block_super, | |
513 | .fs_flags = FS_REQUIRES_DEV, | |
514 | }; | |
515 | ||
51cc5068 | 516 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
517 | { |
518 | struct hfsplus_inode_info *i = p; | |
519 | ||
a35afb83 | 520 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
521 | } |
522 | ||
523 | static int __init init_hfsplus_fs(void) | |
524 | { | |
525 | int err; | |
526 | ||
527 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
528 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 529 | hfsplus_init_once); |
1da177e4 LT |
530 | if (!hfsplus_inode_cachep) |
531 | return -ENOMEM; | |
532 | err = register_filesystem(&hfsplus_fs_type); | |
533 | if (err) | |
534 | kmem_cache_destroy(hfsplus_inode_cachep); | |
535 | return err; | |
536 | } | |
537 | ||
538 | static void __exit exit_hfsplus_fs(void) | |
539 | { | |
540 | unregister_filesystem(&hfsplus_fs_type); | |
1a1d92c1 | 541 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
542 | } |
543 | ||
544 | module_init(init_hfsplus_fs) | |
545 | module_exit(exit_hfsplus_fs) |