Commit | Line | Data |
---|---|---|
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 | ||
70 | static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms) | |
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; | |
80 | HFSPLUS_I(inode).rootflags = perms->rootflags; | |
81 | HFSPLUS_I(inode).userflags = perms->userflags; | |
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); | |
85 | } | |
86 | ||
87 | static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode) | |
88 | { | |
89 | if (S_ISDIR(inode->i_mode)) { | |
90 | struct hfsplus_cat_folder *folder; | |
91 | ||
92 | folder = &entry->folder; | |
93 | memset(folder, 0, sizeof(*folder)); | |
94 | folder->type = cpu_to_be16(HFSPLUS_FOLDER); | |
95 | folder->id = cpu_to_be32(inode->i_ino); | |
9a4cad95 RZ |
96 | HFSPLUS_I(inode).create_date = |
97 | folder->create_date = | |
98 | folder->content_mod_date = | |
99 | folder->attribute_mod_date = | |
100 | folder->access_date = hfsp_now2mt(); | |
1da177e4 LT |
101 | hfsplus_set_perms(inode, &folder->permissions); |
102 | if (inode == HFSPLUS_SB(inode->i_sb).hidden_dir) | |
103 | /* invisible and namelocked */ | |
104 | folder->user_info.frFlags = cpu_to_be16(0x5000); | |
105 | return sizeof(*folder); | |
106 | } else { | |
107 | struct hfsplus_cat_file *file; | |
108 | ||
109 | file = &entry->file; | |
110 | memset(file, 0, sizeof(*file)); | |
111 | file->type = cpu_to_be16(HFSPLUS_FILE); | |
112 | file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); | |
113 | file->id = cpu_to_be32(cnid); | |
9a4cad95 RZ |
114 | HFSPLUS_I(inode).create_date = |
115 | file->create_date = | |
116 | file->content_mod_date = | |
117 | file->attribute_mod_date = | |
118 | file->access_date = hfsp_now2mt(); | |
1da177e4 LT |
119 | if (cnid == inode->i_ino) { |
120 | hfsplus_set_perms(inode, &file->permissions); | |
6b192832 RZ |
121 | if (S_ISLNK(inode->i_mode)) { |
122 | file->user_info.fdType = cpu_to_be32(HFSP_SYMLINK_TYPE); | |
123 | file->user_info.fdCreator = cpu_to_be32(HFSP_SYMLINK_CREATOR); | |
124 | } else { | |
125 | file->user_info.fdType = cpu_to_be32(HFSPLUS_SB(inode->i_sb).type); | |
126 | file->user_info.fdCreator = cpu_to_be32(HFSPLUS_SB(inode->i_sb).creator); | |
127 | } | |
1da177e4 LT |
128 | if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) |
129 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); | |
130 | } else { | |
131 | file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE); | |
132 | file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR); | |
133 | file->user_info.fdFlags = cpu_to_be16(0x100); | |
af8c85bb | 134 | file->create_date = HFSPLUS_I(HFSPLUS_SB(inode->i_sb).hidden_dir).create_date; |
1da177e4 LT |
135 | file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode).dev); |
136 | } | |
137 | return sizeof(*file); | |
138 | } | |
139 | } | |
140 | ||
141 | static int hfsplus_fill_cat_thread(struct super_block *sb, | |
142 | hfsplus_cat_entry *entry, int type, | |
143 | u32 parentid, struct qstr *str) | |
144 | { | |
145 | entry->type = cpu_to_be16(type); | |
146 | entry->thread.reserved = 0; | |
147 | entry->thread.parentID = cpu_to_be32(parentid); | |
148 | hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len); | |
149 | return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; | |
150 | } | |
151 | ||
152 | /* Try to get a catalog entry for given catalog id */ | |
153 | int hfsplus_find_cat(struct super_block *sb, u32 cnid, | |
154 | struct hfs_find_data *fd) | |
155 | { | |
156 | hfsplus_cat_entry tmp; | |
157 | int err; | |
158 | u16 type; | |
159 | ||
160 | hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL); | |
161 | err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry)); | |
162 | if (err) | |
163 | return err; | |
164 | ||
165 | type = be16_to_cpu(tmp.type); | |
166 | if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { | |
634725a9 | 167 | printk(KERN_ERR "hfs: found bad thread record in catalog\n"); |
1da177e4 LT |
168 | return -EIO; |
169 | } | |
170 | ||
efc7ffcb ES |
171 | if (be16_to_cpu(tmp.thread.nodeName.length) > 255) { |
172 | printk(KERN_ERR "hfs: catalog name length corrupted\n"); | |
173 | return -EIO; | |
174 | } | |
175 | ||
1da177e4 LT |
176 | hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), |
177 | &tmp.thread.nodeName); | |
178 | return hfs_brec_find(fd); | |
179 | } | |
180 | ||
181 | int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode) | |
182 | { | |
183 | struct hfs_find_data fd; | |
184 | struct super_block *sb; | |
185 | hfsplus_cat_entry entry; | |
186 | int entry_size; | |
187 | int err; | |
188 | ||
189 | dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); | |
190 | sb = dir->i_sb; | |
191 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
192 | ||
193 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
194 | entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? | |
195 | HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, | |
196 | dir->i_ino, str); | |
197 | err = hfs_brec_find(&fd); | |
198 | if (err != -ENOENT) { | |
199 | if (!err) | |
200 | err = -EEXIST; | |
201 | goto err2; | |
202 | } | |
203 | err = hfs_brec_insert(&fd, &entry, entry_size); | |
204 | if (err) | |
205 | goto err2; | |
206 | ||
207 | hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); | |
208 | entry_size = hfsplus_cat_build_record(&entry, cnid, inode); | |
209 | err = hfs_brec_find(&fd); | |
210 | if (err != -ENOENT) { | |
211 | /* panic? */ | |
212 | if (!err) | |
213 | err = -EEXIST; | |
214 | goto err1; | |
215 | } | |
216 | err = hfs_brec_insert(&fd, &entry, entry_size); | |
217 | if (err) | |
218 | goto err1; | |
219 | ||
220 | dir->i_size++; | |
221 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
222 | mark_inode_dirty(dir); | |
223 | hfs_find_exit(&fd); | |
224 | return 0; | |
225 | ||
226 | err1: | |
227 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
228 | if (!hfs_brec_find(&fd)) | |
229 | hfs_brec_remove(&fd); | |
230 | err2: | |
231 | hfs_find_exit(&fd); | |
232 | return err; | |
233 | } | |
234 | ||
235 | int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) | |
236 | { | |
237 | struct super_block *sb; | |
238 | struct hfs_find_data fd; | |
239 | struct hfsplus_fork_raw fork; | |
240 | struct list_head *pos; | |
241 | int err, off; | |
242 | u16 type; | |
243 | ||
244 | dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); | |
245 | sb = dir->i_sb; | |
246 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
247 | ||
248 | if (!str) { | |
249 | int len; | |
250 | ||
251 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
252 | err = hfs_brec_find(&fd); | |
253 | if (err) | |
254 | goto out; | |
255 | ||
256 | off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); | |
257 | fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); | |
258 | hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); | |
259 | len = be16_to_cpu(fd.search_key->cat.name.length) * 2; | |
260 | hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); | |
261 | fd.search_key->key_len = cpu_to_be16(6 + len); | |
262 | } else | |
263 | hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); | |
264 | ||
265 | err = hfs_brec_find(&fd); | |
266 | if (err) | |
267 | goto out; | |
268 | ||
269 | type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); | |
270 | if (type == HFSPLUS_FILE) { | |
271 | #if 0 | |
272 | off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); | |
273 | hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); | |
274 | hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); | |
275 | #endif | |
276 | ||
277 | off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); | |
278 | hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); | |
279 | hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); | |
280 | } | |
281 | ||
282 | list_for_each(pos, &HFSPLUS_I(dir).open_dir_list) { | |
283 | struct hfsplus_readdir_data *rd = | |
284 | list_entry(pos, struct hfsplus_readdir_data, list); | |
285 | if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) | |
286 | rd->file->f_pos--; | |
287 | } | |
288 | ||
289 | err = hfs_brec_remove(&fd); | |
290 | if (err) | |
291 | goto out; | |
292 | ||
293 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
294 | err = hfs_brec_find(&fd); | |
295 | if (err) | |
296 | goto out; | |
297 | ||
298 | err = hfs_brec_remove(&fd); | |
299 | if (err) | |
300 | goto out; | |
301 | ||
302 | dir->i_size--; | |
303 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
304 | mark_inode_dirty(dir); | |
305 | out: | |
306 | hfs_find_exit(&fd); | |
307 | ||
308 | return err; | |
309 | } | |
310 | ||
311 | int hfsplus_rename_cat(u32 cnid, | |
312 | struct inode *src_dir, struct qstr *src_name, | |
313 | struct inode *dst_dir, struct qstr *dst_name) | |
314 | { | |
315 | struct super_block *sb; | |
316 | struct hfs_find_data src_fd, dst_fd; | |
317 | hfsplus_cat_entry entry; | |
318 | int entry_size, type; | |
319 | int err = 0; | |
320 | ||
321 | dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, | |
322 | dst_dir->i_ino, dst_name->name); | |
323 | sb = src_dir->i_sb; | |
324 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &src_fd); | |
325 | dst_fd = src_fd; | |
326 | ||
327 | /* find the old dir entry and read the data */ | |
328 | hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); | |
329 | err = hfs_brec_find(&src_fd); | |
330 | if (err) | |
331 | goto out; | |
332 | ||
333 | hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, | |
334 | src_fd.entrylength); | |
335 | ||
336 | /* create new dir entry with the data from the old entry */ | |
337 | hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); | |
338 | err = hfs_brec_find(&dst_fd); | |
339 | if (err != -ENOENT) { | |
340 | if (!err) | |
341 | err = -EEXIST; | |
342 | goto out; | |
343 | } | |
344 | ||
345 | err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); | |
346 | if (err) | |
347 | goto out; | |
348 | dst_dir->i_size++; | |
349 | dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; | |
350 | mark_inode_dirty(dst_dir); | |
351 | ||
352 | /* finally remove the old entry */ | |
353 | hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); | |
354 | err = hfs_brec_find(&src_fd); | |
355 | if (err) | |
356 | goto out; | |
357 | err = hfs_brec_remove(&src_fd); | |
358 | if (err) | |
359 | goto out; | |
360 | src_dir->i_size--; | |
361 | src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; | |
362 | mark_inode_dirty(src_dir); | |
363 | ||
364 | /* remove old thread entry */ | |
365 | hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); | |
366 | err = hfs_brec_find(&src_fd); | |
367 | if (err) | |
368 | goto out; | |
369 | type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); | |
370 | err = hfs_brec_remove(&src_fd); | |
371 | if (err) | |
372 | goto out; | |
373 | ||
374 | /* create new thread entry */ | |
375 | hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); | |
376 | entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name); | |
377 | err = hfs_brec_find(&dst_fd); | |
378 | if (err != -ENOENT) { | |
379 | if (!err) | |
380 | err = -EEXIST; | |
381 | goto out; | |
382 | } | |
383 | err = hfs_brec_insert(&dst_fd, &entry, entry_size); | |
384 | out: | |
385 | hfs_bnode_put(dst_fd.bnode); | |
386 | hfs_find_exit(&src_fd); | |
387 | return err; | |
388 | } |