]>
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; | |
6cfd0148 CH |
202 | |
203 | lock_kernel(); | |
204 | ||
8c85e125 CH |
205 | if (sb->s_dirt) |
206 | hfsplus_write_super(sb); | |
945b0920 | 207 | if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) { |
1da177e4 LT |
208 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; |
209 | ||
210 | vhdr->modify_date = hfsp_now2mt(); | |
211 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
212 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
213 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
e39f07c8 | 214 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
1da177e4 LT |
215 | } |
216 | ||
217 | hfs_btree_close(HFSPLUS_SB(sb).cat_tree); | |
218 | hfs_btree_close(HFSPLUS_SB(sb).ext_tree); | |
219 | iput(HFSPLUS_SB(sb).alloc_file); | |
220 | iput(HFSPLUS_SB(sb).hidden_dir); | |
221 | brelse(HFSPLUS_SB(sb).s_vhbh); | |
222 | if (HFSPLUS_SB(sb).nls) | |
223 | unload_nls(HFSPLUS_SB(sb).nls); | |
945b0920 CL |
224 | kfree(sb->s_fs_info); |
225 | sb->s_fs_info = NULL; | |
6cfd0148 CH |
226 | |
227 | unlock_kernel(); | |
1da177e4 LT |
228 | } |
229 | ||
726c3342 | 230 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 231 | { |
726c3342 | 232 | struct super_block *sb = dentry->d_sb; |
25564dd8 | 233 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 234 | |
1da177e4 LT |
235 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
236 | buf->f_bsize = sb->s_blocksize; | |
237 | buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift; | |
238 | buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift; | |
239 | buf->f_bavail = buf->f_bfree; | |
240 | buf->f_files = 0xFFFFFFFF; | |
241 | buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid; | |
25564dd8 CL |
242 | buf->f_fsid.val[0] = (u32)id; |
243 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
244 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
250 | { | |
251 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
252 | return 0; | |
253 | if (!(*flags & MS_RDONLY)) { | |
254 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; | |
b0b623c3 RZ |
255 | struct hfsplus_sb_info sbi; |
256 | ||
257 | memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); | |
258 | sbi.nls = HFSPLUS_SB(sb).nls; | |
259 | if (!hfsplus_parse_options(data, &sbi)) | |
260 | return -EINVAL; | |
1da177e4 LT |
261 | |
262 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 | 263 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
1da177e4 LT |
264 | "running fsck.hfsplus is recommended. leaving read-only.\n"); |
265 | sb->s_flags |= MS_RDONLY; | |
266 | *flags |= MS_RDONLY; | |
b0b623c3 RZ |
267 | } else if (sbi.flags & HFSPLUS_SB_FORCE) { |
268 | /* nothing */ | |
1da177e4 | 269 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 270 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
1da177e4 LT |
271 | sb->s_flags |= MS_RDONLY; |
272 | *flags |= MS_RDONLY; | |
b0b623c3 | 273 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
634725a9 | 274 | printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); |
b0b623c3 RZ |
275 | sb->s_flags |= MS_RDONLY; |
276 | *flags |= MS_RDONLY; | |
1da177e4 LT |
277 | } |
278 | } | |
279 | return 0; | |
280 | } | |
281 | ||
ee9b6d61 | 282 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
283 | .alloc_inode = hfsplus_alloc_inode, |
284 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 LT |
285 | .write_inode = hfsplus_write_inode, |
286 | .clear_inode = hfsplus_clear_inode, | |
287 | .put_super = hfsplus_put_super, | |
288 | .write_super = hfsplus_write_super, | |
289 | .statfs = hfsplus_statfs, | |
290 | .remount_fs = hfsplus_remount, | |
717dd80e | 291 | .show_options = hfsplus_show_options, |
1da177e4 LT |
292 | }; |
293 | ||
294 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
295 | { | |
296 | struct hfsplus_vh *vhdr; | |
297 | struct hfsplus_sb_info *sbi; | |
298 | hfsplus_cat_entry entry; | |
299 | struct hfs_find_data fd; | |
63525391 | 300 | struct inode *root, *inode; |
1da177e4 LT |
301 | struct qstr str; |
302 | struct nls_table *nls = NULL; | |
303 | int err = -EINVAL; | |
304 | ||
a5001a27 | 305 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
306 | if (!sbi) |
307 | return -ENOMEM; | |
308 | ||
1da177e4 LT |
309 | sb->s_fs_info = sbi; |
310 | INIT_HLIST_HEAD(&sbi->rsrc_inodes); | |
717dd80e RZ |
311 | hfsplus_fill_defaults(sbi); |
312 | if (!hfsplus_parse_options(data, sbi)) { | |
634725a9 | 313 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
1da177e4 LT |
314 | err = -EINVAL; |
315 | goto cleanup; | |
316 | } | |
317 | ||
318 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
319 | nls = sbi->nls; | |
320 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 321 | if (!sbi->nls) { |
634725a9 | 322 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
1da177e4 LT |
323 | err = -EINVAL; |
324 | goto cleanup; | |
325 | } | |
326 | ||
327 | /* Grab the volume header */ | |
328 | if (hfsplus_read_wrapper(sb)) { | |
329 | if (!silent) | |
634725a9 | 330 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
1da177e4 LT |
331 | err = -EINVAL; |
332 | goto cleanup; | |
333 | } | |
334 | vhdr = HFSPLUS_SB(sb).s_vhdr; | |
335 | ||
336 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
337 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
338 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
339 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 340 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
1da177e4 LT |
341 | goto cleanup; |
342 | } | |
343 | HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks); | |
344 | HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks); | |
345 | HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc); | |
346 | HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid); | |
347 | HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count); | |
348 | HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count); | |
349 | HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
350 | if (!HFSPLUS_SB(sb).data_clump_blocks) | |
351 | HFSPLUS_SB(sb).data_clump_blocks = 1; | |
352 | HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
353 | if (!HFSPLUS_SB(sb).rsrc_clump_blocks) | |
354 | HFSPLUS_SB(sb).rsrc_clump_blocks = 1; | |
355 | ||
356 | /* Set up operations so we can load metadata */ | |
357 | sb->s_op = &hfsplus_sops; | |
358 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
359 | ||
360 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 RZ |
361 | printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " |
362 | "running fsck.hfsplus is recommended. mounting read-only.\n"); | |
1da177e4 | 363 | sb->s_flags |= MS_RDONLY; |
b0b623c3 RZ |
364 | } else if (sbi->flags & HFSPLUS_SB_FORCE) { |
365 | /* nothing */ | |
1da177e4 | 366 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 367 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 368 | sb->s_flags |= MS_RDONLY; |
81a73719 | 369 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { |
355a4696 | 370 | printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " |
634725a9 | 371 | "use the force option at your own risk, mounting read-only.\n"); |
b0b623c3 | 372 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 373 | } |
b0b623c3 | 374 | sbi->flags &= ~HFSPLUS_SB_FORCE; |
1da177e4 LT |
375 | |
376 | /* Load metadata objects (B*Trees) */ | |
377 | HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); | |
378 | if (!HFSPLUS_SB(sb).ext_tree) { | |
634725a9 | 379 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
1da177e4 LT |
380 | goto cleanup; |
381 | } | |
382 | HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); | |
383 | if (!HFSPLUS_SB(sb).cat_tree) { | |
634725a9 | 384 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
1da177e4 LT |
385 | goto cleanup; |
386 | } | |
387 | ||
63525391 DH |
388 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
389 | if (IS_ERR(inode)) { | |
634725a9 | 390 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 391 | err = PTR_ERR(inode); |
1da177e4 LT |
392 | goto cleanup; |
393 | } | |
63525391 | 394 | HFSPLUS_SB(sb).alloc_file = inode; |
1da177e4 LT |
395 | |
396 | /* Load the root directory */ | |
63525391 DH |
397 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
398 | if (IS_ERR(root)) { | |
399 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
400 | err = PTR_ERR(root); | |
401 | goto cleanup; | |
402 | } | |
1da177e4 LT |
403 | sb->s_root = d_alloc_root(root); |
404 | if (!sb->s_root) { | |
1da177e4 | 405 | iput(root); |
63525391 | 406 | err = -ENOMEM; |
1da177e4 LT |
407 | goto cleanup; |
408 | } | |
d45bce8f | 409 | sb->s_root->d_op = &hfsplus_dentry_operations; |
1da177e4 LT |
410 | |
411 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
412 | str.name = HFSP_HIDDENDIR_NAME; | |
413 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
414 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); | |
415 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
416 | hfs_find_exit(&fd); | |
417 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
418 | goto cleanup; | |
63525391 DH |
419 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
420 | if (IS_ERR(inode)) { | |
421 | err = PTR_ERR(inode); | |
1da177e4 | 422 | goto cleanup; |
63525391 DH |
423 | } |
424 | HFSPLUS_SB(sb).hidden_dir = inode; | |
1da177e4 LT |
425 | } else |
426 | hfs_find_exit(&fd); | |
427 | ||
428 | if (sb->s_flags & MS_RDONLY) | |
429 | goto out; | |
430 | ||
431 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
432 | * all three are registered with Apple for our use | |
433 | */ | |
434 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
435 | vhdr->modify_date = hfsp_now2mt(); | |
20c79e78 | 436 | be32_add_cpu(&vhdr->write_count, 1); |
1da177e4 LT |
437 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
438 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
439 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
e39f07c8 | 440 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
1da177e4 LT |
441 | |
442 | if (!HFSPLUS_SB(sb).hidden_dir) { | |
634725a9 | 443 | printk(KERN_DEBUG "hfs: create hidden dir...\n"); |
1da177e4 LT |
444 | HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
445 | hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode, | |
446 | &str, HFSPLUS_SB(sb).hidden_dir); | |
447 | mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir); | |
448 | } | |
449 | out: | |
450 | unload_nls(sbi->nls); | |
451 | sbi->nls = nls; | |
452 | return 0; | |
453 | ||
454 | cleanup: | |
455 | hfsplus_put_super(sb); | |
456 | if (nls) | |
457 | unload_nls(nls); | |
458 | return err; | |
459 | } | |
460 | ||
461 | MODULE_AUTHOR("Brad Boyer"); | |
462 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
463 | MODULE_LICENSE("GPL"); | |
464 | ||
e18b890b | 465 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
466 | |
467 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
468 | { | |
469 | struct hfsplus_inode_info *i; | |
470 | ||
e94b1766 | 471 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
472 | return i ? &i->vfs_inode : NULL; |
473 | } | |
474 | ||
475 | static void hfsplus_destroy_inode(struct inode *inode) | |
476 | { | |
477 | kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode)); | |
478 | } | |
479 | ||
480 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
481 | ||
454e2398 DH |
482 | static int hfsplus_get_sb(struct file_system_type *fs_type, |
483 | int flags, const char *dev_name, void *data, | |
484 | struct vfsmount *mnt) | |
1da177e4 | 485 | { |
454e2398 DH |
486 | return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super, |
487 | mnt); | |
1da177e4 LT |
488 | } |
489 | ||
490 | static struct file_system_type hfsplus_fs_type = { | |
491 | .owner = THIS_MODULE, | |
492 | .name = "hfsplus", | |
493 | .get_sb = hfsplus_get_sb, | |
494 | .kill_sb = kill_block_super, | |
495 | .fs_flags = FS_REQUIRES_DEV, | |
496 | }; | |
497 | ||
51cc5068 | 498 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
499 | { |
500 | struct hfsplus_inode_info *i = p; | |
501 | ||
a35afb83 | 502 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
503 | } |
504 | ||
505 | static int __init init_hfsplus_fs(void) | |
506 | { | |
507 | int err; | |
508 | ||
509 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
510 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 511 | hfsplus_init_once); |
1da177e4 LT |
512 | if (!hfsplus_inode_cachep) |
513 | return -ENOMEM; | |
514 | err = register_filesystem(&hfsplus_fs_type); | |
515 | if (err) | |
516 | kmem_cache_destroy(hfsplus_inode_cachep); | |
517 | return err; | |
518 | } | |
519 | ||
520 | static void __exit exit_hfsplus_fs(void) | |
521 | { | |
522 | unregister_filesystem(&hfsplus_fs_type); | |
1a1d92c1 | 523 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
524 | } |
525 | ||
526 | module_init(init_hfsplus_fs) | |
527 | module_exit(exit_hfsplus_fs) |