Commit | Line | Data |
---|---|---|
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 | 14 | #include <linux/mpage.h> |
e8edc6e0 | 15 | #include <linux/sched.h> |
1da177e4 LT |
16 | |
17 | #include "hfsplus_fs.h" | |
18 | #include "hfsplus_raw.h" | |
19 | ||
20 | static int hfsplus_readpage(struct file *file, struct page *page) | |
21 | { | |
1da177e4 LT |
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 | { | |
1da177e4 LT |
27 | return block_write_full_page(page, hfsplus_get_block, wbc); |
28 | } | |
29 | ||
7c0efc62 NP |
30 | static int hfsplus_write_begin(struct file *file, struct address_space *mapping, |
31 | loff_t pos, unsigned len, unsigned flags, | |
32 | struct page **pagep, void **fsdata) | |
1da177e4 | 33 | { |
7c0efc62 NP |
34 | *pagep = NULL; |
35 | return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
36 | hfsplus_get_block, | |
37 | &HFSPLUS_I(mapping->host).phys_size); | |
1da177e4 LT |
38 | } |
39 | ||
40 | static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block) | |
41 | { | |
42 | return generic_block_bmap(mapping, block, hfsplus_get_block); | |
43 | } | |
44 | ||
27496a8c | 45 | static int hfsplus_releasepage(struct page *page, gfp_t mask) |
1da177e4 LT |
46 | { |
47 | struct inode *inode = page->mapping->host; | |
48 | struct super_block *sb = inode->i_sb; | |
49 | struct hfs_btree *tree; | |
50 | struct hfs_bnode *node; | |
51 | u32 nidx; | |
52 | int i, res = 1; | |
53 | ||
54 | switch (inode->i_ino) { | |
55 | case HFSPLUS_EXT_CNID: | |
56 | tree = HFSPLUS_SB(sb).ext_tree; | |
57 | break; | |
58 | case HFSPLUS_CAT_CNID: | |
59 | tree = HFSPLUS_SB(sb).cat_tree; | |
60 | break; | |
61 | case HFSPLUS_ATTR_CNID: | |
62 | tree = HFSPLUS_SB(sb).attr_tree; | |
63 | break; | |
64 | default: | |
65 | BUG(); | |
66 | return 0; | |
67 | } | |
70632249 ES |
68 | if (!tree) |
69 | return 0; | |
1da177e4 LT |
70 | if (tree->node_size >= PAGE_CACHE_SIZE) { |
71 | nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT); | |
72 | spin_lock(&tree->hash_lock); | |
73 | node = hfs_bnode_findhash(tree, nidx); | |
74 | if (!node) | |
75 | ; | |
76 | else if (atomic_read(&node->refcnt)) | |
77 | res = 0; | |
78 | if (res && node) { | |
79 | hfs_bnode_unhash(node); | |
80 | hfs_bnode_free(node); | |
81 | } | |
82 | spin_unlock(&tree->hash_lock); | |
83 | } else { | |
84 | nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift); | |
85 | i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift); | |
86 | spin_lock(&tree->hash_lock); | |
87 | do { | |
88 | node = hfs_bnode_findhash(tree, nidx++); | |
89 | if (!node) | |
90 | continue; | |
91 | if (atomic_read(&node->refcnt)) { | |
92 | res = 0; | |
93 | break; | |
94 | } | |
95 | hfs_bnode_unhash(node); | |
96 | hfs_bnode_free(node); | |
97 | } while (--i && nidx < tree->node_count); | |
98 | spin_unlock(&tree->hash_lock); | |
99 | } | |
1da177e4 LT |
100 | return res ? try_to_free_buffers(page) : 0; |
101 | } | |
102 | ||
1da177e4 LT |
103 | static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb, |
104 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
105 | { | |
106 | struct file *file = iocb->ki_filp; | |
f44ea031 | 107 | struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host; |
1da177e4 LT |
108 | |
109 | return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov, | |
1d8fa7a2 | 110 | offset, nr_segs, hfsplus_get_block, NULL); |
1da177e4 LT |
111 | } |
112 | ||
113 | static int hfsplus_writepages(struct address_space *mapping, | |
114 | struct writeback_control *wbc) | |
115 | { | |
116 | return mpage_writepages(mapping, wbc, hfsplus_get_block); | |
117 | } | |
118 | ||
f5e54d6e | 119 | const struct address_space_operations hfsplus_btree_aops = { |
1da177e4 LT |
120 | .readpage = hfsplus_readpage, |
121 | .writepage = hfsplus_writepage, | |
122 | .sync_page = block_sync_page, | |
7c0efc62 NP |
123 | .write_begin = hfsplus_write_begin, |
124 | .write_end = generic_write_end, | |
1da177e4 LT |
125 | .bmap = hfsplus_bmap, |
126 | .releasepage = hfsplus_releasepage, | |
127 | }; | |
128 | ||
f5e54d6e | 129 | const struct address_space_operations hfsplus_aops = { |
1da177e4 LT |
130 | .readpage = hfsplus_readpage, |
131 | .writepage = hfsplus_writepage, | |
132 | .sync_page = block_sync_page, | |
7c0efc62 NP |
133 | .write_begin = hfsplus_write_begin, |
134 | .write_end = generic_write_end, | |
1da177e4 LT |
135 | .bmap = hfsplus_bmap, |
136 | .direct_IO = hfsplus_direct_IO, | |
137 | .writepages = hfsplus_writepages, | |
138 | }; | |
139 | ||
d45bce8f DG |
140 | struct dentry_operations hfsplus_dentry_operations = { |
141 | .d_hash = hfsplus_hash_dentry, | |
142 | .d_compare = hfsplus_compare_dentry, | |
143 | }; | |
144 | ||
1da177e4 LT |
145 | static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry, |
146 | struct nameidata *nd) | |
147 | { | |
148 | struct hfs_find_data fd; | |
149 | struct super_block *sb = dir->i_sb; | |
150 | struct inode *inode = NULL; | |
151 | int err; | |
152 | ||
153 | if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) | |
154 | goto out; | |
155 | ||
156 | inode = HFSPLUS_I(dir).rsrc_inode; | |
157 | if (inode) | |
158 | goto out; | |
159 | ||
160 | inode = new_inode(sb); | |
161 | if (!inode) | |
162 | return ERR_PTR(-ENOMEM); | |
163 | ||
164 | inode->i_ino = dir->i_ino; | |
165 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); | |
895c23f8 | 166 | mutex_init(&HFSPLUS_I(inode).extents_lock); |
1da177e4 LT |
167 | HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC; |
168 | ||
169 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
170 | err = hfsplus_find_cat(sb, dir->i_ino, &fd); | |
171 | if (!err) | |
172 | err = hfsplus_cat_read_inode(inode, &fd); | |
173 | hfs_find_exit(&fd); | |
174 | if (err) { | |
175 | iput(inode); | |
176 | return ERR_PTR(err); | |
177 | } | |
178 | HFSPLUS_I(inode).rsrc_inode = dir; | |
179 | HFSPLUS_I(dir).rsrc_inode = inode; | |
180 | igrab(dir); | |
181 | hlist_add_head(&inode->i_hash, &HFSPLUS_SB(sb).rsrc_inodes); | |
182 | mark_inode_dirty(inode); | |
1da177e4 LT |
183 | out: |
184 | d_add(dentry, inode); | |
185 | return NULL; | |
186 | } | |
187 | ||
188 | static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir) | |
189 | { | |
190 | struct super_block *sb = inode->i_sb; | |
191 | u16 mode; | |
192 | ||
193 | mode = be16_to_cpu(perms->mode); | |
194 | ||
195 | inode->i_uid = be32_to_cpu(perms->owner); | |
196 | if (!inode->i_uid && !mode) | |
197 | inode->i_uid = HFSPLUS_SB(sb).uid; | |
198 | ||
199 | inode->i_gid = be32_to_cpu(perms->group); | |
200 | if (!inode->i_gid && !mode) | |
201 | inode->i_gid = HFSPLUS_SB(sb).gid; | |
202 | ||
203 | if (dir) { | |
204 | mode = mode ? (mode & S_IALLUGO) : | |
205 | (S_IRWXUGO & ~(HFSPLUS_SB(sb).umask)); | |
206 | mode |= S_IFDIR; | |
207 | } else if (!mode) | |
208 | mode = S_IFREG | ((S_IRUGO|S_IWUGO) & | |
209 | ~(HFSPLUS_SB(sb).umask)); | |
210 | inode->i_mode = mode; | |
211 | ||
212 | HFSPLUS_I(inode).rootflags = perms->rootflags; | |
213 | HFSPLUS_I(inode).userflags = perms->userflags; | |
214 | if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE) | |
215 | inode->i_flags |= S_IMMUTABLE; | |
216 | else | |
217 | inode->i_flags &= ~S_IMMUTABLE; | |
218 | if (perms->rootflags & HFSPLUS_FLG_APPEND) | |
219 | inode->i_flags |= S_APPEND; | |
220 | else | |
221 | inode->i_flags &= ~S_APPEND; | |
222 | } | |
223 | ||
224 | static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms) | |
225 | { | |
226 | if (inode->i_flags & S_IMMUTABLE) | |
227 | perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; | |
228 | else | |
229 | perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; | |
230 | if (inode->i_flags & S_APPEND) | |
231 | perms->rootflags |= HFSPLUS_FLG_APPEND; | |
232 | else | |
233 | perms->rootflags &= ~HFSPLUS_FLG_APPEND; | |
234 | perms->userflags = HFSPLUS_I(inode).userflags; | |
235 | perms->mode = cpu_to_be16(inode->i_mode); | |
236 | perms->owner = cpu_to_be32(inode->i_uid); | |
237 | perms->group = cpu_to_be32(inode->i_gid); | |
238 | perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev); | |
239 | } | |
240 | ||
e6305c43 | 241 | static int hfsplus_permission(struct inode *inode, int mask) |
1da177e4 LT |
242 | { |
243 | /* MAY_EXEC is also used for lookup, if no x bit is set allow lookup, | |
244 | * open_exec has the same test, so it's still not executable, if a x bit | |
245 | * is set fall back to standard permission check. | |
246 | */ | |
247 | if (S_ISREG(inode->i_mode) && mask & MAY_EXEC && !(inode->i_mode & 0111)) | |
248 | return 0; | |
249 | return generic_permission(inode, mask, NULL); | |
250 | } | |
251 | ||
252 | ||
253 | static int hfsplus_file_open(struct inode *inode, struct file *file) | |
254 | { | |
255 | if (HFSPLUS_IS_RSRC(inode)) | |
256 | inode = HFSPLUS_I(inode).rsrc_inode; | |
1da177e4 LT |
257 | atomic_inc(&HFSPLUS_I(inode).opencnt); |
258 | return 0; | |
259 | } | |
260 | ||
261 | static int hfsplus_file_release(struct inode *inode, struct file *file) | |
262 | { | |
263 | struct super_block *sb = inode->i_sb; | |
264 | ||
265 | if (HFSPLUS_IS_RSRC(inode)) | |
266 | inode = HFSPLUS_I(inode).rsrc_inode; | |
1da177e4 | 267 | if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) { |
1b1dcc1b | 268 | mutex_lock(&inode->i_mutex); |
1da177e4 LT |
269 | hfsplus_file_truncate(inode); |
270 | if (inode->i_flags & S_DEAD) { | |
271 | hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); | |
272 | hfsplus_delete_inode(inode); | |
273 | } | |
1b1dcc1b | 274 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
275 | } |
276 | return 0; | |
277 | } | |
278 | ||
92e1d5be | 279 | static const struct inode_operations hfsplus_file_inode_operations = { |
1da177e4 LT |
280 | .lookup = hfsplus_file_lookup, |
281 | .truncate = hfsplus_file_truncate, | |
282 | .permission = hfsplus_permission, | |
283 | .setxattr = hfsplus_setxattr, | |
284 | .getxattr = hfsplus_getxattr, | |
285 | .listxattr = hfsplus_listxattr, | |
286 | }; | |
287 | ||
4b6f5d20 | 288 | static const struct file_operations hfsplus_file_operations = { |
1da177e4 | 289 | .llseek = generic_file_llseek, |
543ade1f BP |
290 | .read = do_sync_read, |
291 | .aio_read = generic_file_aio_read, | |
292 | .write = do_sync_write, | |
293 | .aio_write = generic_file_aio_write, | |
1da177e4 | 294 | .mmap = generic_file_mmap, |
5ffc4ef4 | 295 | .splice_read = generic_file_splice_read, |
1da177e4 LT |
296 | .fsync = file_fsync, |
297 | .open = hfsplus_file_open, | |
298 | .release = hfsplus_file_release, | |
299 | .ioctl = hfsplus_ioctl, | |
300 | }; | |
301 | ||
302 | struct inode *hfsplus_new_inode(struct super_block *sb, int mode) | |
303 | { | |
304 | struct inode *inode = new_inode(sb); | |
305 | if (!inode) | |
306 | return NULL; | |
307 | ||
1da177e4 LT |
308 | inode->i_ino = HFSPLUS_SB(sb).next_cnid++; |
309 | inode->i_mode = mode; | |
310 | inode->i_uid = current->fsuid; | |
311 | inode->i_gid = current->fsgid; | |
312 | inode->i_nlink = 1; | |
313 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; | |
1da177e4 | 314 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); |
895c23f8 | 315 | mutex_init(&HFSPLUS_I(inode).extents_lock); |
1da177e4 LT |
316 | atomic_set(&HFSPLUS_I(inode).opencnt, 0); |
317 | HFSPLUS_I(inode).flags = 0; | |
318 | memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec)); | |
319 | memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec)); | |
320 | HFSPLUS_I(inode).alloc_blocks = 0; | |
321 | HFSPLUS_I(inode).first_blocks = 0; | |
322 | HFSPLUS_I(inode).cached_start = 0; | |
323 | HFSPLUS_I(inode).cached_blocks = 0; | |
324 | HFSPLUS_I(inode).phys_size = 0; | |
325 | HFSPLUS_I(inode).fs_blocks = 0; | |
326 | HFSPLUS_I(inode).rsrc_inode = NULL; | |
327 | if (S_ISDIR(inode->i_mode)) { | |
328 | inode->i_size = 2; | |
329 | HFSPLUS_SB(sb).folder_count++; | |
330 | inode->i_op = &hfsplus_dir_inode_operations; | |
331 | inode->i_fop = &hfsplus_dir_operations; | |
332 | } else if (S_ISREG(inode->i_mode)) { | |
333 | HFSPLUS_SB(sb).file_count++; | |
334 | inode->i_op = &hfsplus_file_inode_operations; | |
335 | inode->i_fop = &hfsplus_file_operations; | |
336 | inode->i_mapping->a_ops = &hfsplus_aops; | |
337 | HFSPLUS_I(inode).clump_blocks = HFSPLUS_SB(sb).data_clump_blocks; | |
338 | } else if (S_ISLNK(inode->i_mode)) { | |
339 | HFSPLUS_SB(sb).file_count++; | |
340 | inode->i_op = &page_symlink_inode_operations; | |
341 | inode->i_mapping->a_ops = &hfsplus_aops; | |
342 | HFSPLUS_I(inode).clump_blocks = 1; | |
343 | } else | |
344 | HFSPLUS_SB(sb).file_count++; | |
345 | insert_inode_hash(inode); | |
346 | mark_inode_dirty(inode); | |
347 | sb->s_dirt = 1; | |
348 | ||
349 | return inode; | |
350 | } | |
351 | ||
352 | void hfsplus_delete_inode(struct inode *inode) | |
353 | { | |
354 | struct super_block *sb = inode->i_sb; | |
355 | ||
356 | if (S_ISDIR(inode->i_mode)) { | |
357 | HFSPLUS_SB(sb).folder_count--; | |
358 | sb->s_dirt = 1; | |
359 | return; | |
360 | } | |
361 | HFSPLUS_SB(sb).file_count--; | |
362 | if (S_ISREG(inode->i_mode)) { | |
363 | if (!inode->i_nlink) { | |
364 | inode->i_size = 0; | |
365 | hfsplus_file_truncate(inode); | |
366 | } | |
367 | } else if (S_ISLNK(inode->i_mode)) { | |
368 | inode->i_size = 0; | |
369 | hfsplus_file_truncate(inode); | |
370 | } | |
371 | sb->s_dirt = 1; | |
372 | } | |
373 | ||
374 | void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) | |
375 | { | |
376 | struct super_block *sb = inode->i_sb; | |
377 | u32 count; | |
378 | int i; | |
379 | ||
380 | memcpy(&HFSPLUS_I(inode).first_extents, &fork->extents, | |
381 | sizeof(hfsplus_extent_rec)); | |
382 | for (count = 0, i = 0; i < 8; i++) | |
383 | count += be32_to_cpu(fork->extents[i].block_count); | |
384 | HFSPLUS_I(inode).first_blocks = count; | |
385 | memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec)); | |
386 | HFSPLUS_I(inode).cached_start = 0; | |
387 | HFSPLUS_I(inode).cached_blocks = 0; | |
388 | ||
389 | HFSPLUS_I(inode).alloc_blocks = be32_to_cpu(fork->total_blocks); | |
390 | inode->i_size = HFSPLUS_I(inode).phys_size = be64_to_cpu(fork->total_size); | |
391 | HFSPLUS_I(inode).fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; | |
392 | inode_set_bytes(inode, HFSPLUS_I(inode).fs_blocks << sb->s_blocksize_bits); | |
393 | HFSPLUS_I(inode).clump_blocks = be32_to_cpu(fork->clump_size) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
394 | if (!HFSPLUS_I(inode).clump_blocks) | |
395 | HFSPLUS_I(inode).clump_blocks = HFSPLUS_IS_RSRC(inode) ? HFSPLUS_SB(sb).rsrc_clump_blocks : | |
396 | HFSPLUS_SB(sb).data_clump_blocks; | |
397 | } | |
398 | ||
399 | void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork) | |
400 | { | |
401 | memcpy(&fork->extents, &HFSPLUS_I(inode).first_extents, | |
402 | sizeof(hfsplus_extent_rec)); | |
403 | fork->total_size = cpu_to_be64(inode->i_size); | |
404 | fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode).alloc_blocks); | |
405 | } | |
406 | ||
407 | int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) | |
408 | { | |
409 | hfsplus_cat_entry entry; | |
410 | int res = 0; | |
411 | u16 type; | |
412 | ||
413 | type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset); | |
414 | ||
415 | HFSPLUS_I(inode).dev = 0; | |
1da177e4 LT |
416 | if (type == HFSPLUS_FOLDER) { |
417 | struct hfsplus_cat_folder *folder = &entry.folder; | |
418 | ||
419 | if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) | |
420 | /* panic? */; | |
421 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, | |
422 | sizeof(struct hfsplus_cat_folder)); | |
423 | hfsplus_get_perms(inode, &folder->permissions, 1); | |
424 | inode->i_nlink = 1; | |
425 | inode->i_size = 2 + be32_to_cpu(folder->valence); | |
426 | inode->i_atime = hfsp_mt2ut(folder->access_date); | |
427 | inode->i_mtime = hfsp_mt2ut(folder->content_mod_date); | |
9a4cad95 RZ |
428 | inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date); |
429 | HFSPLUS_I(inode).create_date = folder->create_date; | |
1da177e4 LT |
430 | HFSPLUS_I(inode).fs_blocks = 0; |
431 | inode->i_op = &hfsplus_dir_inode_operations; | |
432 | inode->i_fop = &hfsplus_dir_operations; | |
433 | } else if (type == HFSPLUS_FILE) { | |
434 | struct hfsplus_cat_file *file = &entry.file; | |
435 | ||
436 | if (fd->entrylength < sizeof(struct hfsplus_cat_file)) | |
437 | /* panic? */; | |
438 | hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, | |
439 | sizeof(struct hfsplus_cat_file)); | |
440 | ||
441 | hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ? | |
442 | &file->data_fork : &file->rsrc_fork); | |
443 | hfsplus_get_perms(inode, &file->permissions, 0); | |
444 | inode->i_nlink = 1; | |
445 | if (S_ISREG(inode->i_mode)) { | |
446 | if (file->permissions.dev) | |
447 | inode->i_nlink = be32_to_cpu(file->permissions.dev); | |
448 | inode->i_op = &hfsplus_file_inode_operations; | |
449 | inode->i_fop = &hfsplus_file_operations; | |
450 | inode->i_mapping->a_ops = &hfsplus_aops; | |
451 | } else if (S_ISLNK(inode->i_mode)) { | |
452 | inode->i_op = &page_symlink_inode_operations; | |
453 | inode->i_mapping->a_ops = &hfsplus_aops; | |
454 | } else { | |
455 | init_special_inode(inode, inode->i_mode, | |
456 | be32_to_cpu(file->permissions.dev)); | |
457 | } | |
458 | inode->i_atime = hfsp_mt2ut(file->access_date); | |
459 | inode->i_mtime = hfsp_mt2ut(file->content_mod_date); | |
9a4cad95 RZ |
460 | inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date); |
461 | HFSPLUS_I(inode).create_date = file->create_date; | |
1da177e4 | 462 | } else { |
634725a9 | 463 | printk(KERN_ERR "hfs: bad catalog entry used to create inode\n"); |
1da177e4 LT |
464 | res = -EIO; |
465 | } | |
466 | return res; | |
467 | } | |
468 | ||
469 | int hfsplus_cat_write_inode(struct inode *inode) | |
470 | { | |
471 | struct inode *main_inode = inode; | |
472 | struct hfs_find_data fd; | |
473 | hfsplus_cat_entry entry; | |
474 | ||
475 | if (HFSPLUS_IS_RSRC(inode)) | |
476 | main_inode = HFSPLUS_I(inode).rsrc_inode; | |
477 | ||
478 | if (!main_inode->i_nlink) | |
479 | return 0; | |
480 | ||
481 | if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd)) | |
482 | /* panic? */ | |
483 | return -EIO; | |
484 | ||
485 | if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd)) | |
486 | /* panic? */ | |
487 | goto out; | |
488 | ||
489 | if (S_ISDIR(main_inode->i_mode)) { | |
490 | struct hfsplus_cat_folder *folder = &entry.folder; | |
491 | ||
492 | if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) | |
493 | /* panic? */; | |
494 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
495 | sizeof(struct hfsplus_cat_folder)); | |
496 | /* simple node checks? */ | |
497 | hfsplus_set_perms(inode, &folder->permissions); | |
498 | folder->access_date = hfsp_ut2mt(inode->i_atime); | |
499 | folder->content_mod_date = hfsp_ut2mt(inode->i_mtime); | |
500 | folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); | |
501 | folder->valence = cpu_to_be32(inode->i_size - 2); | |
502 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, | |
503 | sizeof(struct hfsplus_cat_folder)); | |
504 | } else if (HFSPLUS_IS_RSRC(inode)) { | |
505 | struct hfsplus_cat_file *file = &entry.file; | |
506 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
507 | sizeof(struct hfsplus_cat_file)); | |
508 | hfsplus_inode_write_fork(inode, &file->rsrc_fork); | |
509 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, | |
510 | sizeof(struct hfsplus_cat_file)); | |
511 | } else { | |
512 | struct hfsplus_cat_file *file = &entry.file; | |
513 | ||
514 | if (fd.entrylength < sizeof(struct hfsplus_cat_file)) | |
515 | /* panic? */; | |
516 | hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, | |
517 | sizeof(struct hfsplus_cat_file)); | |
518 | hfsplus_inode_write_fork(inode, &file->data_fork); | |
519 | if (S_ISREG(inode->i_mode)) | |
520 | HFSPLUS_I(inode).dev = inode->i_nlink; | |
521 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
522 | HFSPLUS_I(inode).dev = kdev_t_to_nr(inode->i_rdev); | |
523 | hfsplus_set_perms(inode, &file->permissions); | |
524 | if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) | |
525 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); | |
526 | else | |
527 | file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); | |
528 | file->access_date = hfsp_ut2mt(inode->i_atime); | |
529 | file->content_mod_date = hfsp_ut2mt(inode->i_mtime); | |
530 | file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); | |
531 | hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, | |
532 | sizeof(struct hfsplus_cat_file)); | |
533 | } | |
534 | out: | |
535 | hfs_find_exit(&fd); | |
536 | return 0; | |
537 | } |