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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/hfsplus/catalog.c | |
3 | * | |
4 | * Copyright (C) 2001 | |
5 | * Brad Boyer (flar@allandria.com) | |
6 | * (C) 2003 Ardis Technologies <roman@ardistech.com> | |
7 | * | |
8 | * Handling of catalog records | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | |
12 | #include "hfsplus_fs.h" | |
13 | #include "hfsplus_raw.h" | |
14 | ||
2179d372 DE |
15 | int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1, |
16 | const hfsplus_btree_key *k2) | |
1da177e4 LT |
17 | { |
18 | __be32 k1p, k2p; | |
19 | ||
20 | k1p = k1->cat.parent; | |
21 | k2p = k2->cat.parent; | |
22 | if (k1p != k2p) | |
23 | return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; | |
24 | ||
2179d372 DE |
25 | return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name); |
26 | } | |
27 | ||
28 | int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1, | |
29 | const hfsplus_btree_key *k2) | |
30 | { | |
31 | __be32 k1p, k2p; | |
32 | ||
33 | k1p = k1->cat.parent; | |
34 | k2p = k2->cat.parent; | |
35 | if (k1p != k2p) | |
36 | return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; | |
37 | ||
38 | return hfsplus_strcmp(&k1->cat.name, &k2->cat.name); | |
1da177e4 LT |
39 | } |
40 | ||
41 | void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key, | |
42 | u32 parent, struct qstr *str) | |
43 | { | |
44 | int len; | |
45 | ||
46 | key->cat.parent = cpu_to_be32(parent); | |
47 | if (str) { | |
48 | hfsplus_asc2uni(sb, &key->cat.name, str->name, str->len); | |
49 | len = be16_to_cpu(key->cat.name.length); | |
50 | } else { | |
51 | key->cat.name.length = 0; | |
52 | len = 0; | |
53 | } | |
54 | key->key_len = cpu_to_be16(6 + 2 * len); | |
55 | } | |
56 | ||
57 | static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent, | |
58 | struct hfsplus_unistr *name) | |
59 | { | |
60 | int ustrlen; | |
61 | ||
62 | ustrlen = be16_to_cpu(name->length); | |
63 | key->cat.parent = cpu_to_be32(parent); | |
64 | key->cat.name.length = cpu_to_be16(ustrlen); | |
65 | ustrlen *= 2; | |
66 | memcpy(key->cat.name.unicode, name->unicode, ustrlen); | |
67 | key->key_len = cpu_to_be16(6 + ustrlen); | |
68 | } | |
69 | ||
90e61690 | 70 | void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms) |
1da177e4 LT |
71 | { |
72 | if (inode->i_flags & S_IMMUTABLE) | |
73 | perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; | |
74 | else | |
75 | perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; | |
76 | if (inode->i_flags & S_APPEND) | |
77 | perms->rootflags |= HFSPLUS_FLG_APPEND; | |
78 | else | |
79 | perms->rootflags &= ~HFSPLUS_FLG_APPEND; | |
90e61690 CH |
80 | |
81 | perms->userflags = HFSPLUS_I(inode)->userflags; | |
1da177e4 LT |
82 | perms->mode = cpu_to_be16(inode->i_mode); |
83 | perms->owner = cpu_to_be32(inode->i_uid); | |
84 | perms->group = cpu_to_be32(inode->i_gid); | |
90e61690 CH |
85 | |
86 | if (S_ISREG(inode->i_mode)) | |
87 | perms->dev = cpu_to_be32(inode->i_nlink); | |
88 | else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) | |
89 | perms->dev = cpu_to_be32(inode->i_rdev); | |
90 | else | |
91 | perms->dev = 0; | |
1da177e4 LT |
92 | } |
93 | ||
94 | static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode) | |
95 | { | |
dd73a01a CH |
96 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
97 | ||
1da177e4 LT |
98 | if (S_ISDIR(inode->i_mode)) { |
99 | struct hfsplus_cat_folder *folder; | |
100 | ||
101 | folder = &entry->folder; | |
102 | memset(folder, 0, sizeof(*folder)); | |
103 | folder->type = cpu_to_be16(HFSPLUS_FOLDER); | |
104 | folder->id = cpu_to_be32(inode->i_ino); | |
6af502de | 105 | HFSPLUS_I(inode)->create_date = |
9a4cad95 RZ |
106 | folder->create_date = |
107 | folder->content_mod_date = | |
108 | folder->attribute_mod_date = | |
109 | folder->access_date = hfsp_now2mt(); | |
90e61690 | 110 | hfsplus_cat_set_perms(inode, &folder->permissions); |
dd73a01a | 111 | if (inode == sbi->hidden_dir) |
1da177e4 LT |
112 | /* invisible and namelocked */ |
113 | folder->user_info.frFlags = cpu_to_be16(0x5000); | |
114 | return sizeof(*folder); | |
115 | } else { | |
116 | struct hfsplus_cat_file *file; | |
117 | ||
118 | file = &entry->file; | |
119 | memset(file, 0, sizeof(*file)); | |
120 | file->type = cpu_to_be16(HFSPLUS_FILE); | |
121 | file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); | |
122 | file->id = cpu_to_be32(cnid); | |
6af502de | 123 | HFSPLUS_I(inode)->create_date = |
9a4cad95 RZ |
124 | file->create_date = |
125 | file->content_mod_date = | |
126 | file->attribute_mod_date = | |
127 | file->access_date = hfsp_now2mt(); | |
1da177e4 | 128 | if (cnid == inode->i_ino) { |
90e61690 | 129 | hfsplus_cat_set_perms(inode, &file->permissions); |
6b192832 RZ |
130 | if (S_ISLNK(inode->i_mode)) { |
131 | file->user_info.fdType = cpu_to_be32(HFSP_SYMLINK_TYPE); | |
132 | file->user_info.fdCreator = cpu_to_be32(HFSP_SYMLINK_CREATOR); | |
133 | } else { | |
dd73a01a CH |
134 | file->user_info.fdType = cpu_to_be32(sbi->type); |
135 | file->user_info.fdCreator = cpu_to_be32(sbi->creator); | |
6b192832 | 136 | } |
1da177e4 LT |
137 | if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) |
138 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); | |
139 | } else { | |
140 | file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE); | |
141 | file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR); | |
142 | file->user_info.fdFlags = cpu_to_be16(0x100); | |
6af502de | 143 | file->create_date = HFSPLUS_I(sbi->hidden_dir)->create_date; |
f6089ff8 | 144 | file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode)->linkid); |
1da177e4 LT |
145 | } |
146 | return sizeof(*file); | |
147 | } | |
148 | } | |
149 | ||
150 | static int hfsplus_fill_cat_thread(struct super_block *sb, | |
151 | hfsplus_cat_entry *entry, int type, | |
152 | u32 parentid, struct qstr *str) | |
153 | { | |
154 | entry->type = cpu_to_be16(type); | |
155 | entry->thread.reserved = 0; | |
156 | entry->thread.parentID = cpu_to_be32(parentid); | |
157 | hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len); | |
158 | return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; | |
159 | } | |
160 | ||
161 | /* Try to get a catalog entry for given catalog id */ | |
162 | int hfsplus_find_cat(struct super_block *sb, u32 cnid, | |
163 | struct hfs_find_data *fd) | |
164 | { | |
165 | hfsplus_cat_entry tmp; | |
166 | int err; | |
167 | u16 type; | |
168 | ||
169 | hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL); | |
170 | err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry)); | |
171 | if (err) | |
172 | return err; | |
173 | ||
174 | type = be16_to_cpu(tmp.type); | |
175 | if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { | |
634725a9 | 176 | printk(KERN_ERR "hfs: found bad thread record in catalog\n"); |
1da177e4 LT |
177 | return -EIO; |
178 | } | |
179 | ||
efc7ffcb ES |
180 | if (be16_to_cpu(tmp.thread.nodeName.length) > 255) { |
181 | printk(KERN_ERR "hfs: catalog name length corrupted\n"); | |
182 | return -EIO; | |
183 | } | |
184 | ||
1da177e4 LT |
185 | hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), |
186 | &tmp.thread.nodeName); | |
187 | return hfs_brec_find(fd); | |
188 | } | |
189 | ||
190 | int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode) | |
191 | { | |
dd73a01a | 192 | struct super_block *sb = dir->i_sb; |
1da177e4 | 193 | struct hfs_find_data fd; |
1da177e4 LT |
194 | hfsplus_cat_entry entry; |
195 | int entry_size; | |
196 | int err; | |
197 | ||
198 | dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); | |
dd73a01a | 199 | hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); |
1da177e4 LT |
200 | |
201 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
202 | entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? | |
203 | HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, | |
204 | dir->i_ino, str); | |
205 | err = hfs_brec_find(&fd); | |
206 | if (err != -ENOENT) { | |
207 | if (!err) | |
208 | err = -EEXIST; | |
209 | goto err2; | |
210 | } | |
211 | err = hfs_brec_insert(&fd, &entry, entry_size); | |
212 | if (err) | |
213 | goto err2; | |
214 | ||
215 | hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); | |
216 | entry_size = hfsplus_cat_build_record(&entry, cnid, inode); | |
217 | err = hfs_brec_find(&fd); | |
218 | if (err != -ENOENT) { | |
219 | /* panic? */ | |
220 | if (!err) | |
221 | err = -EEXIST; | |
222 | goto err1; | |
223 | } | |
224 | err = hfs_brec_insert(&fd, &entry, entry_size); | |
225 | if (err) | |
226 | goto err1; | |
227 | ||
228 | dir->i_size++; | |
229 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
230 | mark_inode_dirty(dir); | |
231 | hfs_find_exit(&fd); | |
232 | return 0; | |
233 | ||
234 | err1: | |
235 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
236 | if (!hfs_brec_find(&fd)) | |
237 | hfs_brec_remove(&fd); | |
238 | err2: | |
239 | hfs_find_exit(&fd); | |
240 | return err; | |
241 | } | |
242 | ||
243 | int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) | |
244 | { | |
dd73a01a | 245 | struct super_block *sb = dir->i_sb; |
1da177e4 LT |
246 | struct hfs_find_data fd; |
247 | struct hfsplus_fork_raw fork; | |
248 | struct list_head *pos; | |
249 | int err, off; | |
250 | u16 type; | |
251 | ||
252 | dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); | |
dd73a01a | 253 | hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); |
1da177e4 LT |
254 | |
255 | if (!str) { | |
256 | int len; | |
257 | ||
258 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
259 | err = hfs_brec_find(&fd); | |
260 | if (err) | |
261 | goto out; | |
262 | ||
263 | off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); | |
264 | fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); | |
265 | hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); | |
266 | len = be16_to_cpu(fd.search_key->cat.name.length) * 2; | |
267 | hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); | |
268 | fd.search_key->key_len = cpu_to_be16(6 + len); | |
269 | } else | |
270 | hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); | |
271 | ||
272 | err = hfs_brec_find(&fd); | |
273 | if (err) | |
274 | goto out; | |
275 | ||
276 | type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); | |
277 | if (type == HFSPLUS_FILE) { | |
278 | #if 0 | |
279 | off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); | |
280 | hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); | |
281 | hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); | |
282 | #endif | |
283 | ||
284 | off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); | |
285 | hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); | |
286 | hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); | |
287 | } | |
288 | ||
6af502de | 289 | list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) { |
1da177e4 LT |
290 | struct hfsplus_readdir_data *rd = |
291 | list_entry(pos, struct hfsplus_readdir_data, list); | |
292 | if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) | |
293 | rd->file->f_pos--; | |
294 | } | |
295 | ||
296 | err = hfs_brec_remove(&fd); | |
297 | if (err) | |
298 | goto out; | |
299 | ||
300 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
301 | err = hfs_brec_find(&fd); | |
302 | if (err) | |
303 | goto out; | |
304 | ||
305 | err = hfs_brec_remove(&fd); | |
306 | if (err) | |
307 | goto out; | |
308 | ||
309 | dir->i_size--; | |
310 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
311 | mark_inode_dirty(dir); | |
312 | out: | |
313 | hfs_find_exit(&fd); | |
314 | ||
315 | return err; | |
316 | } | |
317 | ||
318 | int hfsplus_rename_cat(u32 cnid, | |
319 | struct inode *src_dir, struct qstr *src_name, | |
320 | struct inode *dst_dir, struct qstr *dst_name) | |
321 | { | |
dd73a01a | 322 | struct super_block *sb = src_dir->i_sb; |
1da177e4 LT |
323 | struct hfs_find_data src_fd, dst_fd; |
324 | hfsplus_cat_entry entry; | |
325 | int entry_size, type; | |
326 | int err = 0; | |
327 | ||
328 | dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, | |
329 | dst_dir->i_ino, dst_name->name); | |
dd73a01a | 330 | hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd); |
1da177e4 LT |
331 | dst_fd = src_fd; |
332 | ||
333 | /* find the old dir entry and read the data */ | |
334 | hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); | |
335 | err = hfs_brec_find(&src_fd); | |
336 | if (err) | |
337 | goto out; | |
338 | ||
339 | hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, | |
340 | src_fd.entrylength); | |
341 | ||
342 | /* create new dir entry with the data from the old entry */ | |
343 | hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); | |
344 | err = hfs_brec_find(&dst_fd); | |
345 | if (err != -ENOENT) { | |
346 | if (!err) | |
347 | err = -EEXIST; | |
348 | goto out; | |
349 | } | |
350 | ||
351 | err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); | |
352 | if (err) | |
353 | goto out; | |
354 | dst_dir->i_size++; | |
355 | dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; | |
356 | mark_inode_dirty(dst_dir); | |
357 | ||
358 | /* finally remove the old entry */ | |
359 | hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); | |
360 | err = hfs_brec_find(&src_fd); | |
361 | if (err) | |
362 | goto out; | |
363 | err = hfs_brec_remove(&src_fd); | |
364 | if (err) | |
365 | goto out; | |
366 | src_dir->i_size--; | |
367 | src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; | |
368 | mark_inode_dirty(src_dir); | |
369 | ||
370 | /* remove old thread entry */ | |
371 | hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); | |
372 | err = hfs_brec_find(&src_fd); | |
373 | if (err) | |
374 | goto out; | |
375 | type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); | |
376 | err = hfs_brec_remove(&src_fd); | |
377 | if (err) | |
378 | goto out; | |
379 | ||
380 | /* create new thread entry */ | |
381 | hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); | |
382 | entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name); | |
383 | err = hfs_brec_find(&dst_fd); | |
384 | if (err != -ENOENT) { | |
385 | if (!err) | |
386 | err = -EEXIST; | |
387 | goto out; | |
388 | } | |
389 | err = hfs_brec_insert(&dst_fd, &entry, entry_size); | |
390 | out: | |
391 | hfs_bnode_put(dst_fd.bnode); | |
392 | hfs_find_exit(&src_fd); | |
393 | return err; | |
394 | } |