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 | ||
63525391 | 23 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
24 | { |
25 | struct hfs_find_data fd; | |
26 | struct hfsplus_vh *vhdr; | |
63525391 DH |
27 | struct inode *inode; |
28 | long err = -EIO; | |
29 | ||
30 | inode = iget_locked(sb, ino); | |
31 | if (!inode) | |
32 | return ERR_PTR(-ENOMEM); | |
33 | if (!(inode->i_state & I_NEW)) | |
34 | return inode; | |
1da177e4 | 35 | |
1da177e4 | 36 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); |
895c23f8 | 37 | mutex_init(&HFSPLUS_I(inode).extents_lock); |
1da177e4 LT |
38 | HFSPLUS_I(inode).flags = 0; |
39 | HFSPLUS_I(inode).rsrc_inode = NULL; | |
94c1d318 | 40 | atomic_set(&HFSPLUS_I(inode).opencnt, 0); |
1da177e4 LT |
41 | |
42 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { | |
43 | read_inode: | |
44 | hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); | |
45 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); | |
46 | if (!err) | |
47 | err = hfsplus_cat_read_inode(inode, &fd); | |
48 | hfs_find_exit(&fd); | |
49 | if (err) | |
50 | goto bad_inode; | |
63525391 | 51 | goto done; |
1da177e4 LT |
52 | } |
53 | vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; | |
54 | switch(inode->i_ino) { | |
55 | case HFSPLUS_ROOT_CNID: | |
56 | goto read_inode; | |
57 | case HFSPLUS_EXT_CNID: | |
58 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); | |
59 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
60 | break; | |
61 | case HFSPLUS_CAT_CNID: | |
62 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); | |
63 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
64 | break; | |
65 | case HFSPLUS_ALLOC_CNID: | |
66 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); | |
67 | inode->i_mapping->a_ops = &hfsplus_aops; | |
68 | break; | |
69 | case HFSPLUS_START_CNID: | |
70 | hfsplus_inode_read_fork(inode, &vhdr->start_file); | |
71 | break; | |
72 | case HFSPLUS_ATTR_CNID: | |
73 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); | |
74 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
75 | break; | |
76 | default: | |
77 | goto bad_inode; | |
78 | } | |
79 | ||
63525391 DH |
80 | done: |
81 | unlock_new_inode(inode); | |
82 | return inode; | |
1da177e4 | 83 | |
63525391 DH |
84 | bad_inode: |
85 | iget_failed(inode); | |
86 | return ERR_PTR(err); | |
1da177e4 LT |
87 | } |
88 | ||
89 | static int hfsplus_write_inode(struct inode *inode, int unused) | |
90 | { | |
91 | struct hfsplus_vh *vhdr; | |
92 | int ret = 0; | |
93 | ||
94 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); | |
95 | hfsplus_ext_write_extent(inode); | |
96 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { | |
97 | return hfsplus_cat_write_inode(inode); | |
98 | } | |
99 | vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; | |
100 | switch (inode->i_ino) { | |
101 | case HFSPLUS_ROOT_CNID: | |
102 | ret = hfsplus_cat_write_inode(inode); | |
103 | break; | |
104 | case HFSPLUS_EXT_CNID: | |
105 | if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) { | |
106 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
107 | inode->i_sb->s_dirt = 1; | |
108 | } | |
109 | hfsplus_inode_write_fork(inode, &vhdr->ext_file); | |
110 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree); | |
111 | break; | |
112 | case HFSPLUS_CAT_CNID: | |
113 | if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) { | |
114 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
115 | inode->i_sb->s_dirt = 1; | |
116 | } | |
117 | hfsplus_inode_write_fork(inode, &vhdr->cat_file); | |
118 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree); | |
119 | break; | |
120 | case HFSPLUS_ALLOC_CNID: | |
121 | if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) { | |
122 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
123 | inode->i_sb->s_dirt = 1; | |
124 | } | |
125 | hfsplus_inode_write_fork(inode, &vhdr->alloc_file); | |
126 | break; | |
127 | case HFSPLUS_START_CNID: | |
128 | if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) { | |
129 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
130 | inode->i_sb->s_dirt = 1; | |
131 | } | |
132 | hfsplus_inode_write_fork(inode, &vhdr->start_file); | |
133 | break; | |
134 | case HFSPLUS_ATTR_CNID: | |
135 | if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) { | |
136 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
137 | inode->i_sb->s_dirt = 1; | |
138 | } | |
139 | hfsplus_inode_write_fork(inode, &vhdr->attr_file); | |
140 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree); | |
141 | break; | |
142 | } | |
143 | return ret; | |
144 | } | |
145 | ||
146 | static void hfsplus_clear_inode(struct inode *inode) | |
147 | { | |
148 | dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino); | |
1da177e4 LT |
149 | if (HFSPLUS_IS_RSRC(inode)) { |
150 | HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL; | |
151 | iput(HFSPLUS_I(inode).rsrc_inode); | |
152 | } | |
1da177e4 LT |
153 | } |
154 | ||
155 | static void hfsplus_write_super(struct super_block *sb) | |
156 | { | |
157 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; | |
158 | ||
159 | dprint(DBG_SUPER, "hfsplus_write_super\n"); | |
160 | sb->s_dirt = 0; | |
161 | if (sb->s_flags & MS_RDONLY) | |
162 | /* warn? */ | |
163 | return; | |
164 | ||
165 | vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks); | |
166 | vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc); | |
167 | vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid); | |
168 | vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count); | |
169 | vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count); | |
170 | ||
171 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
172 | if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) { | |
173 | if (HFSPLUS_SB(sb).sect_count) { | |
174 | struct buffer_head *bh; | |
175 | u32 block, offset; | |
176 | ||
177 | block = HFSPLUS_SB(sb).blockoffset; | |
178 | block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9); | |
179 | offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1); | |
634725a9 | 180 | printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset, |
1da177e4 LT |
181 | HFSPLUS_SB(sb).sect_count, block, offset); |
182 | bh = sb_bread(sb, block); | |
183 | if (bh) { | |
184 | vhdr = (struct hfsplus_vh *)(bh->b_data + offset); | |
185 | if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) { | |
186 | memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr)); | |
187 | mark_buffer_dirty(bh); | |
188 | brelse(bh); | |
189 | } else | |
634725a9 | 190 | printk(KERN_WARNING "hfs: backup not found!\n"); |
1da177e4 LT |
191 | } |
192 | } | |
193 | HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP; | |
194 | } | |
195 | } | |
196 | ||
197 | static void hfsplus_put_super(struct super_block *sb) | |
198 | { | |
199 | dprint(DBG_SUPER, "hfsplus_put_super\n"); | |
945b0920 CL |
200 | if (!sb->s_fs_info) |
201 | return; | |
202 | if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) { | |
1da177e4 LT |
203 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; |
204 | ||
205 | vhdr->modify_date = hfsp_now2mt(); | |
206 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
207 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
208 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
e39f07c8 | 209 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
1da177e4 LT |
210 | } |
211 | ||
212 | hfs_btree_close(HFSPLUS_SB(sb).cat_tree); | |
213 | hfs_btree_close(HFSPLUS_SB(sb).ext_tree); | |
214 | iput(HFSPLUS_SB(sb).alloc_file); | |
215 | iput(HFSPLUS_SB(sb).hidden_dir); | |
216 | brelse(HFSPLUS_SB(sb).s_vhbh); | |
217 | if (HFSPLUS_SB(sb).nls) | |
218 | unload_nls(HFSPLUS_SB(sb).nls); | |
945b0920 CL |
219 | kfree(sb->s_fs_info); |
220 | sb->s_fs_info = NULL; | |
1da177e4 LT |
221 | } |
222 | ||
726c3342 | 223 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 224 | { |
726c3342 | 225 | struct super_block *sb = dentry->d_sb; |
25564dd8 | 226 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 227 | |
1da177e4 LT |
228 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
229 | buf->f_bsize = sb->s_blocksize; | |
230 | buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift; | |
231 | buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift; | |
232 | buf->f_bavail = buf->f_bfree; | |
233 | buf->f_files = 0xFFFFFFFF; | |
234 | buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid; | |
25564dd8 CL |
235 | buf->f_fsid.val[0] = (u32)id; |
236 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
237 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
243 | { | |
244 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
245 | return 0; | |
246 | if (!(*flags & MS_RDONLY)) { | |
247 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; | |
b0b623c3 RZ |
248 | struct hfsplus_sb_info sbi; |
249 | ||
250 | memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); | |
251 | sbi.nls = HFSPLUS_SB(sb).nls; | |
252 | if (!hfsplus_parse_options(data, &sbi)) | |
253 | return -EINVAL; | |
1da177e4 LT |
254 | |
255 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 | 256 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
1da177e4 LT |
257 | "running fsck.hfsplus is recommended. leaving read-only.\n"); |
258 | sb->s_flags |= MS_RDONLY; | |
259 | *flags |= MS_RDONLY; | |
b0b623c3 RZ |
260 | } else if (sbi.flags & HFSPLUS_SB_FORCE) { |
261 | /* nothing */ | |
1da177e4 | 262 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 263 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
1da177e4 LT |
264 | sb->s_flags |= MS_RDONLY; |
265 | *flags |= MS_RDONLY; | |
b0b623c3 | 266 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
634725a9 | 267 | printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); |
b0b623c3 RZ |
268 | sb->s_flags |= MS_RDONLY; |
269 | *flags |= MS_RDONLY; | |
1da177e4 LT |
270 | } |
271 | } | |
272 | return 0; | |
273 | } | |
274 | ||
ee9b6d61 | 275 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
276 | .alloc_inode = hfsplus_alloc_inode, |
277 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 LT |
278 | .write_inode = hfsplus_write_inode, |
279 | .clear_inode = hfsplus_clear_inode, | |
280 | .put_super = hfsplus_put_super, | |
281 | .write_super = hfsplus_write_super, | |
282 | .statfs = hfsplus_statfs, | |
283 | .remount_fs = hfsplus_remount, | |
717dd80e | 284 | .show_options = hfsplus_show_options, |
1da177e4 LT |
285 | }; |
286 | ||
287 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
288 | { | |
289 | struct hfsplus_vh *vhdr; | |
290 | struct hfsplus_sb_info *sbi; | |
291 | hfsplus_cat_entry entry; | |
292 | struct hfs_find_data fd; | |
63525391 | 293 | struct inode *root, *inode; |
1da177e4 LT |
294 | struct qstr str; |
295 | struct nls_table *nls = NULL; | |
296 | int err = -EINVAL; | |
297 | ||
a5001a27 | 298 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
299 | if (!sbi) |
300 | return -ENOMEM; | |
301 | ||
1da177e4 LT |
302 | sb->s_fs_info = sbi; |
303 | INIT_HLIST_HEAD(&sbi->rsrc_inodes); | |
717dd80e RZ |
304 | hfsplus_fill_defaults(sbi); |
305 | if (!hfsplus_parse_options(data, sbi)) { | |
634725a9 | 306 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
1da177e4 LT |
307 | err = -EINVAL; |
308 | goto cleanup; | |
309 | } | |
310 | ||
311 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
312 | nls = sbi->nls; | |
313 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 314 | if (!sbi->nls) { |
634725a9 | 315 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
1da177e4 LT |
316 | err = -EINVAL; |
317 | goto cleanup; | |
318 | } | |
319 | ||
320 | /* Grab the volume header */ | |
321 | if (hfsplus_read_wrapper(sb)) { | |
322 | if (!silent) | |
634725a9 | 323 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
1da177e4 LT |
324 | err = -EINVAL; |
325 | goto cleanup; | |
326 | } | |
327 | vhdr = HFSPLUS_SB(sb).s_vhdr; | |
328 | ||
329 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
330 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
331 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
332 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 333 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
1da177e4 LT |
334 | goto cleanup; |
335 | } | |
336 | HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks); | |
337 | HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks); | |
338 | HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc); | |
339 | HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid); | |
340 | HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count); | |
341 | HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count); | |
342 | HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
343 | if (!HFSPLUS_SB(sb).data_clump_blocks) | |
344 | HFSPLUS_SB(sb).data_clump_blocks = 1; | |
345 | HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
346 | if (!HFSPLUS_SB(sb).rsrc_clump_blocks) | |
347 | HFSPLUS_SB(sb).rsrc_clump_blocks = 1; | |
348 | ||
349 | /* Set up operations so we can load metadata */ | |
350 | sb->s_op = &hfsplus_sops; | |
351 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
352 | ||
353 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 RZ |
354 | printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " |
355 | "running fsck.hfsplus is recommended. mounting read-only.\n"); | |
1da177e4 | 356 | sb->s_flags |= MS_RDONLY; |
b0b623c3 RZ |
357 | } else if (sbi->flags & HFSPLUS_SB_FORCE) { |
358 | /* nothing */ | |
1da177e4 | 359 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 360 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 361 | sb->s_flags |= MS_RDONLY; |
81a73719 | 362 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { |
355a4696 | 363 | printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " |
634725a9 | 364 | "use the force option at your own risk, mounting read-only.\n"); |
b0b623c3 | 365 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 366 | } |
b0b623c3 | 367 | sbi->flags &= ~HFSPLUS_SB_FORCE; |
1da177e4 LT |
368 | |
369 | /* Load metadata objects (B*Trees) */ | |
370 | HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); | |
371 | if (!HFSPLUS_SB(sb).ext_tree) { | |
634725a9 | 372 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
1da177e4 LT |
373 | goto cleanup; |
374 | } | |
375 | HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); | |
376 | if (!HFSPLUS_SB(sb).cat_tree) { | |
634725a9 | 377 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
1da177e4 LT |
378 | goto cleanup; |
379 | } | |
380 | ||
63525391 DH |
381 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
382 | if (IS_ERR(inode)) { | |
634725a9 | 383 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 384 | err = PTR_ERR(inode); |
1da177e4 LT |
385 | goto cleanup; |
386 | } | |
63525391 | 387 | HFSPLUS_SB(sb).alloc_file = inode; |
1da177e4 LT |
388 | |
389 | /* Load the root directory */ | |
63525391 DH |
390 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
391 | if (IS_ERR(root)) { | |
392 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
393 | err = PTR_ERR(root); | |
394 | goto cleanup; | |
395 | } | |
1da177e4 LT |
396 | sb->s_root = d_alloc_root(root); |
397 | if (!sb->s_root) { | |
1da177e4 | 398 | iput(root); |
63525391 | 399 | err = -ENOMEM; |
1da177e4 LT |
400 | goto cleanup; |
401 | } | |
d45bce8f | 402 | sb->s_root->d_op = &hfsplus_dentry_operations; |
1da177e4 LT |
403 | |
404 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
405 | str.name = HFSP_HIDDENDIR_NAME; | |
406 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
407 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); | |
408 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
409 | hfs_find_exit(&fd); | |
410 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
411 | goto cleanup; | |
63525391 DH |
412 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
413 | if (IS_ERR(inode)) { | |
414 | err = PTR_ERR(inode); | |
1da177e4 | 415 | goto cleanup; |
63525391 DH |
416 | } |
417 | HFSPLUS_SB(sb).hidden_dir = inode; | |
1da177e4 LT |
418 | } else |
419 | hfs_find_exit(&fd); | |
420 | ||
421 | if (sb->s_flags & MS_RDONLY) | |
422 | goto out; | |
423 | ||
424 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
425 | * all three are registered with Apple for our use | |
426 | */ | |
427 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
428 | vhdr->modify_date = hfsp_now2mt(); | |
20c79e78 | 429 | be32_add_cpu(&vhdr->write_count, 1); |
1da177e4 LT |
430 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
431 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
432 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
e39f07c8 | 433 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
1da177e4 LT |
434 | |
435 | if (!HFSPLUS_SB(sb).hidden_dir) { | |
634725a9 | 436 | printk(KERN_DEBUG "hfs: create hidden dir...\n"); |
1da177e4 LT |
437 | HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
438 | hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode, | |
439 | &str, HFSPLUS_SB(sb).hidden_dir); | |
440 | mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir); | |
441 | } | |
442 | out: | |
443 | unload_nls(sbi->nls); | |
444 | sbi->nls = nls; | |
445 | return 0; | |
446 | ||
447 | cleanup: | |
448 | hfsplus_put_super(sb); | |
449 | if (nls) | |
450 | unload_nls(nls); | |
451 | return err; | |
452 | } | |
453 | ||
454 | MODULE_AUTHOR("Brad Boyer"); | |
455 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
456 | MODULE_LICENSE("GPL"); | |
457 | ||
e18b890b | 458 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
459 | |
460 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
461 | { | |
462 | struct hfsplus_inode_info *i; | |
463 | ||
e94b1766 | 464 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
465 | return i ? &i->vfs_inode : NULL; |
466 | } | |
467 | ||
468 | static void hfsplus_destroy_inode(struct inode *inode) | |
469 | { | |
470 | kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode)); | |
471 | } | |
472 | ||
473 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
474 | ||
454e2398 DH |
475 | static int hfsplus_get_sb(struct file_system_type *fs_type, |
476 | int flags, const char *dev_name, void *data, | |
477 | struct vfsmount *mnt) | |
1da177e4 | 478 | { |
454e2398 DH |
479 | return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super, |
480 | mnt); | |
1da177e4 LT |
481 | } |
482 | ||
483 | static struct file_system_type hfsplus_fs_type = { | |
484 | .owner = THIS_MODULE, | |
485 | .name = "hfsplus", | |
486 | .get_sb = hfsplus_get_sb, | |
487 | .kill_sb = kill_block_super, | |
488 | .fs_flags = FS_REQUIRES_DEV, | |
489 | }; | |
490 | ||
51cc5068 | 491 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
492 | { |
493 | struct hfsplus_inode_info *i = p; | |
494 | ||
a35afb83 | 495 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
496 | } |
497 | ||
498 | static int __init init_hfsplus_fs(void) | |
499 | { | |
500 | int err; | |
501 | ||
502 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
503 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 504 | hfsplus_init_once); |
1da177e4 LT |
505 | if (!hfsplus_inode_cachep) |
506 | return -ENOMEM; | |
507 | err = register_filesystem(&hfsplus_fs_type); | |
508 | if (err) | |
509 | kmem_cache_destroy(hfsplus_inode_cachep); | |
510 | return err; | |
511 | } | |
512 | ||
513 | static void __exit exit_hfsplus_fs(void) | |
514 | { | |
515 | unregister_filesystem(&hfsplus_fs_type); | |
1a1d92c1 | 516 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
517 | } |
518 | ||
519 | module_init(init_hfsplus_fs) | |
520 | module_exit(exit_hfsplus_fs) |