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1da177e4 LT |
1 | /* |
2 | * linux/fs/hfsplus/inode.c | |
3 | * | |
4 | * Copyright (C) 2001 | |
5 | * Brad Boyer (flar@allandria.com) | |
6 | * (C) 2003 Ardis Technologies <roman@ardistech.com> | |
7 | * | |
8 | * Inode handling routines | |
9 | */ | |
10 | ||
11 | #include <linux/mm.h> | |
12 | #include <linux/fs.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/version.h> | |
15 | #include <linux/mpage.h> | |
16 | ||
17 | #include "hfsplus_fs.h" | |
18 | #include "hfsplus_raw.h" | |
19 | ||
20 | static int hfsplus_readpage(struct file *file, struct page *page) | |
21 | { | |
22 | //printk("readpage: %lu\n", page->index); | |
23 | return block_read_full_page(page, hfsplus_get_block); | |
24 | } | |
25 | ||
26 | static int hfsplus_writepage(struct page *page, struct writeback_control *wbc) | |
27 | { | |
28 | //printk("writepage: %lu\n", page->index); | |
29 | return block_write_full_page(page, hfsplus_get_block, wbc); | |
30 | } | |
31 | ||
32 | static int hfsplus_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) | |
33 | { | |
34 | return cont_prepare_write(page, from, to, hfsplus_get_block, | |
35 | &HFSPLUS_I(page->mapping->host).phys_size); | |
36 | } | |
37 | ||
38 | static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block) | |
39 | { | |
40 | return generic_block_bmap(mapping, block, hfsplus_get_block); | |
41 | } | |
42 | ||
27496a8c | 43 | static int hfsplus_releasepage(struct page *page, gfp_t mask) |
1da177e4 LT |
44 | { |
45 | struct inode *inode = page->mapping->host; | |
46 | struct super_block *sb = inode->i_sb; | |
47 | struct hfs_btree *tree; | |
48 | struct hfs_bnode *node; | |
49 | u32 nidx; | |
50 | int i, res = 1; | |
51 | ||
52 | switch (inode->i_ino) { | |
53 | case HFSPLUS_EXT_CNID: | |
54 | tree = HFSPLUS_SB(sb).ext_tree; | |
55 | break; | |
56 | case HFSPLUS_CAT_CNID: | |
57 | tree = HFSPLUS_SB(sb).cat_tree; | |
58 | break; | |
59 | case HFSPLUS_ATTR_CNID: | |
60 | tree = HFSPLUS_SB(sb).attr_tree; | |
61 | break; | |
62 | default: | |
63 | BUG(); | |
64 | return 0; | |
65 | } | |
66 | if (tree->node_size >= PAGE_CACHE_SIZE) { | |
67 | nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT); | |
68 | spin_lock(&tree->hash_lock); | |
69 | node = hfs_bnode_findhash(tree, nidx); | |
70 | if (!node) | |
71 | ; | |
72 | else if (atomic_read(&node->refcnt)) | |
73 | res = 0; | |
74 | if (res && node) { | |
75 | hfs_bnode_unhash(node); | |
76 | hfs_bnode_free(node); | |
77 | } | |
78 | spin_unlock(&tree->hash_lock); | |
79 | } else { | |
80 | nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift); | |
81 | i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift); | |
82 | spin_lock(&tree->hash_lock); | |
83 | do { | |
84 | node = hfs_bnode_findhash(tree, nidx++); | |
85 | if (!node) | |
86 | continue; | |
87 | if (atomic_read(&node->refcnt)) { | |
88 | res = 0; | |
89 | break; | |
90 | } | |
91 | hfs_bnode_unhash(node); | |
92 | hfs_bnode_free(node); | |
93 | } while (--i && nidx < tree->node_count); | |
94 | spin_unlock(&tree->hash_lock); | |
95 | } | |
96 | //printk("releasepage: %lu,%x = %d\n", page->index, mask, res); | |
97 | return res ? try_to_free_buffers(page) : 0; | |
98 | } | |
99 | ||
100 | static int hfsplus_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks, | |
101 | struct buffer_head *bh_result, int create) | |
102 | { | |
103 | int ret; | |
104 | ||
105 | ret = hfsplus_get_block(inode, iblock, bh_result, create); | |
106 | if (!ret) | |
107 | bh_result->b_size = (1 << inode->i_blkbits); | |
108 | return ret; | |
109 | } | |
110 | ||
111 | static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb, | |
112 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
113 | { | |
114 | struct file *file = iocb->ki_filp; | |
115 | struct inode *inode = file->f_dentry->d_inode->i_mapping->host; | |
116 | ||
117 | return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov, | |
118 | offset, nr_segs, hfsplus_get_blocks, NULL); | |
119 | } | |
120 | ||
121 | static int hfsplus_writepages(struct address_space *mapping, | |
122 | struct writeback_control *wbc) | |
123 | { | |
124 | return mpage_writepages(mapping, wbc, hfsplus_get_block); | |
125 | } | |
126 | ||
127 | struct address_space_operations hfsplus_btree_aops = { | |
128 | .readpage = hfsplus_readpage, | |
129 | .writepage = hfsplus_writepage, | |
130 | .sync_page = block_sync_page, | |
131 | .prepare_write = hfsplus_prepare_write, | |
132 | .commit_write = generic_commit_write, | |
133 | .bmap = hfsplus_bmap, | |
134 | .releasepage = hfsplus_releasepage, | |
135 | }; | |
136 | ||
137 | struct address_space_operations hfsplus_aops = { | |
138 | .readpage = hfsplus_readpage, | |
139 | .writepage = hfsplus_writepage, | |
140 | .sync_page = block_sync_page, | |
141 | .prepare_write = hfsplus_prepare_write, | |
142 | .commit_write = generic_commit_write, | |
143 | .bmap = hfsplus_bmap, | |
144 | .direct_IO = hfsplus_direct_IO, | |
145 | .writepages = hfsplus_writepages, | |
146 | }; | |
147 | ||
148 | static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry, | |
149 | struct nameidata *nd) | |
150 | { | |
151 | struct hfs_find_data fd; | |
152 | struct super_block *sb = dir->i_sb; | |
153 | struct inode *inode = NULL; | |
154 | int err; | |
155 | ||
156 | if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) | |
157 | goto out; | |
158 | ||
159 | inode = HFSPLUS_I(dir).rsrc_inode; | |
160 | if (inode) | |
161 | goto out; | |
162 | ||
163 | inode = new_inode(sb); | |
164 | if (!inode) | |
165 | return ERR_PTR(-ENOMEM); | |
166 | ||
167 | inode->i_ino = dir->i_ino; | |
168 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); | |
169 | init_MUTEX(&HFSPLUS_I(inode).extents_lock); | |
170 | HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC; | |
171 | ||
172 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
173 | err = hfsplus_find_cat(sb, dir->i_ino, &fd); | |
174 | if (!err) | |
175 | err = hfsplus_cat_read_inode(inode, &fd); | |
176 | hfs_find_exit(&fd); | |
177 | if (err) { | |
178 | iput(inode); | |
179 | return ERR_PTR(err); | |
180 | } | |
181 | HFSPLUS_I(inode).rsrc_inode = dir; | |
182 | HFSPLUS_I(dir).rsrc_inode = inode; | |
183 | igrab(dir); | |
184 | hlist_add_head(&inode->i_hash, &HFSPLUS_SB(sb).rsrc_inodes); | |
185 | mark_inode_dirty(inode); | |
186 | { | |
187 | void hfsplus_inode_check(struct super_block *sb); | |
188 | atomic_inc(&HFSPLUS_SB(sb).inode_cnt); | |
189 | hfsplus_inode_check(sb); | |
190 | } | |
191 | out: | |
192 | d_add(dentry, inode); | |
193 | return NULL; | |
194 | } | |
195 | ||
196 | static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir) | |
197 | { | |
198 | struct super_block *sb = inode->i_sb; | |
199 | u16 mode; | |
200 | ||
201 | mode = be16_to_cpu(perms->mode); | |
202 | ||
203 | inode->i_uid = be32_to_cpu(perms->owner); | |
204 | if (!inode->i_uid && !mode) | |
205 | inode->i_uid = HFSPLUS_SB(sb).uid; | |
206 | ||
207 | inode->i_gid = be32_to_cpu(perms->group); | |
208 | if (!inode->i_gid && !mode) | |
209 | inode->i_gid = HFSPLUS_SB(sb).gid; | |
210 | ||
211 | if (dir) { | |
212 | mode = mode ? (mode & S_IALLUGO) : | |
213 | (S_IRWXUGO & ~(HFSPLUS_SB(sb).umask)); | |
214 | mode |= S_IFDIR; | |
215 | } else if (!mode) | |
216 | mode = S_IFREG | ((S_IRUGO|S_IWUGO) & | |
217 | ~(HFSPLUS_SB(sb).umask)); | |
218 | inode->i_mode = mode; | |
219 | ||
220 | HFSPLUS_I(inode).rootflags = perms->rootflags; | |
221 | HFSPLUS_I(inode).userflags = perms->userflags; | |
222 | if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE) | |
223 | inode->i_flags |= S_IMMUTABLE; | |
224 | else | |
225 | inode->i_flags &= ~S_IMMUTABLE; | |
226 | if (perms->rootflags & HFSPLUS_FLG_APPEND) | |
227 | inode->i_flags |= S_APPEND; | |
228 | else | |
229 | inode->i_flags &= ~S_APPEND; | |
230 | } | |
231 | ||
232 | static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms) | |
233 | { | |
234 | if (inode->i_flags & S_IMMUTABLE) | |
235 | perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; | |
236 | else | |
237 | perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; | |
238 | if (inode->i_flags & S_APPEND) | |
239 | perms->rootflags |= HFSPLUS_FLG_APPEND; | |
240 | else | |
241 | perms->rootflags &= ~HFSPLUS_FLG_APPEND; | |
242 | perms->userflags = HFSPLUS_I(inode).userflags; | |
243 | perms->mode = cpu_to_be16(inode->i_mode); | |
244 | perms->owner = cpu_to_be32(inode->i_uid); | |
245 | perms->group = cpu_to_be32(inode->i_gid); | |
246 | perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev); | |
247 | } | |
248 | ||
249 | static int hfsplus_permission(struct inode *inode, int mask, struct nameidata *nd) | |
250 | { | |
251 | /* MAY_EXEC is also used for lookup, if no x bit is set allow lookup, | |
252 | * open_exec has the same test, so it's still not executable, if a x bit | |
253 | * is set fall back to standard permission check. | |
254 | */ | |
255 | if (S_ISREG(inode->i_mode) && mask & MAY_EXEC && !(inode->i_mode & 0111)) | |
256 | return 0; | |
257 | return generic_permission(inode, mask, NULL); | |
258 | } | |
259 | ||
260 | ||
261 | static int hfsplus_file_open(struct inode *inode, struct file *file) | |
262 | { | |
263 | if (HFSPLUS_IS_RSRC(inode)) | |
264 | inode = HFSPLUS_I(inode).rsrc_inode; | |
265 | if (atomic_read(&file->f_count) != 1) | |
266 | return 0; | |
267 | atomic_inc(&HFSPLUS_I(inode).opencnt); | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int hfsplus_file_release(struct inode *inode, struct file *file) | |
272 | { | |
273 | struct super_block *sb = inode->i_sb; | |
274 | ||
275 | if (HFSPLUS_IS_RSRC(inode)) | |
276 | inode = HFSPLUS_I(inode).rsrc_inode; | |
277 | if (atomic_read(&file->f_count) != 0) | |
278 | return 0; | |
279 | if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) { | |
280 | down(&inode->i_sem); | |
281 | hfsplus_file_truncate(inode); | |
282 | if (inode->i_flags & S_DEAD) { | |
283 | hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); | |
284 | hfsplus_delete_inode(inode); | |
285 | } | |
286 | up(&inode->i_sem); | |
287 | } | |
288 | return 0; | |
289 | } | |
290 | ||
291 | extern struct inode_operations hfsplus_dir_inode_operations; | |
292 | extern struct file_operations hfsplus_dir_operations; | |
293 | ||
294 | static struct inode_operations hfsplus_file_inode_operations = { | |
295 | .lookup = hfsplus_file_lookup, | |
296 | .truncate = hfsplus_file_truncate, | |
297 | .permission = hfsplus_permission, | |
298 | .setxattr = hfsplus_setxattr, | |
299 | .getxattr = hfsplus_getxattr, | |
300 | .listxattr = hfsplus_listxattr, | |
301 | }; | |
302 | ||
303 | static struct file_operations hfsplus_file_operations = { | |
304 | .llseek = generic_file_llseek, | |
305 | .read = generic_file_read, | |
306 | .write = generic_file_write, | |
307 | .mmap = generic_file_mmap, | |
308 | .sendfile = generic_file_sendfile, | |
309 | .fsync = file_fsync, | |
310 | .open = hfsplus_file_open, | |
311 | .release = hfsplus_file_release, | |
312 | .ioctl = hfsplus_ioctl, | |
313 | }; | |
314 | ||
315 | struct inode *hfsplus_new_inode(struct super_block *sb, int mode) | |
316 | { | |
317 | struct inode *inode = new_inode(sb); | |
318 | if (!inode) | |
319 | return NULL; | |
320 | ||
321 | { | |
322 | void hfsplus_inode_check(struct super_block *sb); | |
323 | atomic_inc(&HFSPLUS_SB(sb).inode_cnt); | |
324 | hfsplus_inode_check(sb); | |
325 | } | |
326 | inode->i_ino = HFSPLUS_SB(sb).next_cnid++; | |
327 | inode->i_mode = mode; | |
328 | inode->i_uid = current->fsuid; | |
329 | inode->i_gid = current->fsgid; | |
330 | inode->i_nlink = 1; | |
331 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; | |
332 | inode->i_blksize = HFSPLUS_SB(sb).alloc_blksz; | |
333 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); | |
334 | init_MUTEX(&HFSPLUS_I(inode).extents_lock); | |
335 | atomic_set(&HFSPLUS_I(inode).opencnt, 0); | |
336 | HFSPLUS_I(inode).flags = 0; | |
337 | memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec)); | |
338 | memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec)); | |
339 | HFSPLUS_I(inode).alloc_blocks = 0; | |
340 | HFSPLUS_I(inode).first_blocks = 0; | |
341 | HFSPLUS_I(inode).cached_start = 0; | |
342 | HFSPLUS_I(inode).cached_blocks = 0; | |
343 | HFSPLUS_I(inode).phys_size = 0; | |
344 | HFSPLUS_I(inode).fs_blocks = 0; | |
345 | HFSPLUS_I(inode).rsrc_inode = NULL; | |
346 | if (S_ISDIR(inode->i_mode)) { | |
347 | inode->i_size = 2; | |
348 | HFSPLUS_SB(sb).folder_count++; | |
349 | inode->i_op = &hfsplus_dir_inode_operations; | |
350 | inode->i_fop = &hfsplus_dir_operations; | |
351 | } else if (S_ISREG(inode->i_mode)) { | |
352 | HFSPLUS_SB(sb).file_count++; | |
353 | inode->i_op = &hfsplus_file_inode_operations; | |
354 | inode->i_fop = &hfsplus_file_operations; | |
355 | inode->i_mapping->a_ops = &hfsplus_aops; | |
356 | HFSPLUS_I(inode).clump_blocks = HFSPLUS_SB(sb).data_clump_blocks; | |
357 | } else if (S_ISLNK(inode->i_mode)) { | |
358 | HFSPLUS_SB(sb).file_count++; | |
359 | inode->i_op = &page_symlink_inode_operations; | |
360 | inode->i_mapping->a_ops = &hfsplus_aops; | |
361 | HFSPLUS_I(inode).clump_blocks = 1; | |
362 | } else | |
363 | HFSPLUS_SB(sb).file_count++; | |
364 | insert_inode_hash(inode); | |
365 | mark_inode_dirty(inode); | |
366 | sb->s_dirt = 1; | |
367 | ||
368 | return inode; | |
369 | } | |
370 | ||
371 | void hfsplus_delete_inode(struct inode *inode) | |
372 | { | |
373 | struct super_block *sb = inode->i_sb; | |
374 | ||
375 | if (S_ISDIR(inode->i_mode)) { | |
376 | HFSPLUS_SB(sb).folder_count--; | |
377 | sb->s_dirt = 1; | |
378 | return; | |
379 | } | |
380 | HFSPLUS_SB(sb).file_count--; | |
381 | if (S_ISREG(inode->i_mode)) { | |
382 | if (!inode->i_nlink) { | |
383 | inode->i_size = 0; | |
384 | hfsplus_file_truncate(inode); | |
385 | } | |
386 | } else if (S_ISLNK(inode->i_mode)) { | |
387 | inode->i_size = 0; | |
388 | hfsplus_file_truncate(inode); | |
389 | } | |
390 | sb->s_dirt = 1; | |
391 | } | |
392 | ||
393 | void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) | |
394 | { | |
395 | struct super_block *sb = inode->i_sb; | |
396 | u32 count; | |
397 | int i; | |
398 | ||
399 | memcpy(&HFSPLUS_I(inode).first_extents, &fork->extents, | |
400 | sizeof(hfsplus_extent_rec)); | |
401 | for (count = 0, i = 0; i < 8; i++) | |
402 | count += be32_to_cpu(fork->extents[i].block_count); | |
403 | HFSPLUS_I(inode).first_blocks = count; | |
404 | memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec)); | |
405 | HFSPLUS_I(inode).cached_start = 0; | |
406 | HFSPLUS_I(inode).cached_blocks = 0; | |
407 | ||
408 | HFSPLUS_I(inode).alloc_blocks = be32_to_cpu(fork->total_blocks); | |
409 | inode->i_size = HFSPLUS_I(inode).phys_size = be64_to_cpu(fork->total_size); | |
410 | HFSPLUS_I(inode).fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
411 | inode_set_bytes(inode, HFSPLUS_I(inode).fs_blocks << sb->s_blocksize_bits); | |
412 | HFSPLUS_I(inode).clump_blocks = be32_to_cpu(fork->clump_size) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
413 | if (!HFSPLUS_I(inode).clump_blocks) | |
414 | HFSPLUS_I(inode).clump_blocks = HFSPLUS_IS_RSRC(inode) ? HFSPLUS_SB(sb).rsrc_clump_blocks : | |
415 | HFSPLUS_SB(sb).data_clump_blocks; | |
416 | } | |
417 | ||
418 | void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork) | |
419 | { | |
420 | memcpy(&fork->extents, &HFSPLUS_I(inode).first_extents, | |
421 | sizeof(hfsplus_extent_rec)); | |
422 | fork->total_size = cpu_to_be64(inode->i_size); | |
423 | fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode).alloc_blocks); | |
424 | } | |
425 | ||
426 | int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) | |
427 | { | |
428 | hfsplus_cat_entry entry; | |
429 | int res = 0; | |
430 | u16 type; | |
431 | ||
432 | type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset); | |
433 | ||
434 | HFSPLUS_I(inode).dev = 0; | |
435 | inode->i_blksize = HFSPLUS_SB(inode->i_sb).alloc_blksz; | |
436 | if (type == HFSPLUS_FOLDER) { | |
437 | struct hfsplus_cat_folder *folder = &entry.folder; | |
438 | ||
439 | if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) | |
440 | /* panic? */; | |
441 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, | |
442 | sizeof(struct hfsplus_cat_folder)); | |
443 | hfsplus_get_perms(inode, &folder->permissions, 1); | |
444 | inode->i_nlink = 1; | |
445 | inode->i_size = 2 + be32_to_cpu(folder->valence); | |
446 | inode->i_atime = hfsp_mt2ut(folder->access_date); | |
447 | inode->i_mtime = hfsp_mt2ut(folder->content_mod_date); | |
448 | inode->i_ctime = inode->i_mtime; | |
449 | HFSPLUS_I(inode).fs_blocks = 0; | |
450 | inode->i_op = &hfsplus_dir_inode_operations; | |
451 | inode->i_fop = &hfsplus_dir_operations; | |
452 | } else if (type == HFSPLUS_FILE) { | |
453 | struct hfsplus_cat_file *file = &entry.file; | |
454 | ||
455 | if (fd->entrylength < sizeof(struct hfsplus_cat_file)) | |
456 | /* panic? */; | |
457 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, | |
458 | sizeof(struct hfsplus_cat_file)); | |
459 | ||
460 | hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ? | |
461 | &file->data_fork : &file->rsrc_fork); | |
462 | hfsplus_get_perms(inode, &file->permissions, 0); | |
463 | inode->i_nlink = 1; | |
464 | if (S_ISREG(inode->i_mode)) { | |
465 | if (file->permissions.dev) | |
466 | inode->i_nlink = be32_to_cpu(file->permissions.dev); | |
467 | inode->i_op = &hfsplus_file_inode_operations; | |
468 | inode->i_fop = &hfsplus_file_operations; | |
469 | inode->i_mapping->a_ops = &hfsplus_aops; | |
470 | } else if (S_ISLNK(inode->i_mode)) { | |
471 | inode->i_op = &page_symlink_inode_operations; | |
472 | inode->i_mapping->a_ops = &hfsplus_aops; | |
473 | } else { | |
474 | init_special_inode(inode, inode->i_mode, | |
475 | be32_to_cpu(file->permissions.dev)); | |
476 | } | |
477 | inode->i_atime = hfsp_mt2ut(file->access_date); | |
478 | inode->i_mtime = hfsp_mt2ut(file->content_mod_date); | |
479 | inode->i_ctime = inode->i_mtime; | |
480 | } else { | |
481 | printk("HFS+-fs: bad catalog entry used to create inode\n"); | |
482 | res = -EIO; | |
483 | } | |
484 | return res; | |
485 | } | |
486 | ||
487 | int hfsplus_cat_write_inode(struct inode *inode) | |
488 | { | |
489 | struct inode *main_inode = inode; | |
490 | struct hfs_find_data fd; | |
491 | hfsplus_cat_entry entry; | |
492 | ||
493 | if (HFSPLUS_IS_RSRC(inode)) | |
494 | main_inode = HFSPLUS_I(inode).rsrc_inode; | |
495 | ||
496 | if (!main_inode->i_nlink) | |
497 | return 0; | |
498 | ||
499 | if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd)) | |
500 | /* panic? */ | |
501 | return -EIO; | |
502 | ||
503 | if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd)) | |
504 | /* panic? */ | |
505 | goto out; | |
506 | ||
507 | if (S_ISDIR(main_inode->i_mode)) { | |
508 | struct hfsplus_cat_folder *folder = &entry.folder; | |
509 | ||
510 | if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) | |
511 | /* panic? */; | |
512 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
513 | sizeof(struct hfsplus_cat_folder)); | |
514 | /* simple node checks? */ | |
515 | hfsplus_set_perms(inode, &folder->permissions); | |
516 | folder->access_date = hfsp_ut2mt(inode->i_atime); | |
517 | folder->content_mod_date = hfsp_ut2mt(inode->i_mtime); | |
518 | folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); | |
519 | folder->valence = cpu_to_be32(inode->i_size - 2); | |
520 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, | |
521 | sizeof(struct hfsplus_cat_folder)); | |
522 | } else if (HFSPLUS_IS_RSRC(inode)) { | |
523 | struct hfsplus_cat_file *file = &entry.file; | |
524 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
525 | sizeof(struct hfsplus_cat_file)); | |
526 | hfsplus_inode_write_fork(inode, &file->rsrc_fork); | |
527 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, | |
528 | sizeof(struct hfsplus_cat_file)); | |
529 | } else { | |
530 | struct hfsplus_cat_file *file = &entry.file; | |
531 | ||
532 | if (fd.entrylength < sizeof(struct hfsplus_cat_file)) | |
533 | /* panic? */; | |
534 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
535 | sizeof(struct hfsplus_cat_file)); | |
536 | hfsplus_inode_write_fork(inode, &file->data_fork); | |
537 | if (S_ISREG(inode->i_mode)) | |
538 | HFSPLUS_I(inode).dev = inode->i_nlink; | |
539 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
540 | HFSPLUS_I(inode).dev = kdev_t_to_nr(inode->i_rdev); | |
541 | hfsplus_set_perms(inode, &file->permissions); | |
542 | if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) | |
543 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); | |
544 | else | |
545 | file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); | |
546 | file->access_date = hfsp_ut2mt(inode->i_atime); | |
547 | file->content_mod_date = hfsp_ut2mt(inode->i_mtime); | |
548 | file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); | |
549 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, | |
550 | sizeof(struct hfsplus_cat_file)); | |
551 | } | |
552 | out: | |
553 | hfs_find_exit(&fd); | |
554 | return 0; | |
555 | } |