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