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 | ||
11 | #include <linux/sched.h> | |
12 | ||
13 | #include "hfsplus_fs.h" | |
14 | #include "hfsplus_raw.h" | |
15 | ||
2179d372 DE |
16 | int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1, |
17 | const hfsplus_btree_key *k2) | |
1da177e4 LT |
18 | { |
19 | __be32 k1p, k2p; | |
20 | ||
21 | k1p = k1->cat.parent; | |
22 | k2p = k2->cat.parent; | |
23 | if (k1p != k2p) | |
24 | return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; | |
25 | ||
2179d372 DE |
26 | return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name); |
27 | } | |
28 | ||
29 | int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1, | |
30 | const hfsplus_btree_key *k2) | |
31 | { | |
32 | __be32 k1p, k2p; | |
33 | ||
34 | k1p = k1->cat.parent; | |
35 | k2p = k2->cat.parent; | |
36 | if (k1p != k2p) | |
37 | return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; | |
38 | ||
39 | return hfsplus_strcmp(&k1->cat.name, &k2->cat.name); | |
1da177e4 LT |
40 | } |
41 | ||
42 | void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key, | |
43 | u32 parent, struct qstr *str) | |
44 | { | |
45 | int len; | |
46 | ||
47 | key->cat.parent = cpu_to_be32(parent); | |
48 | if (str) { | |
49 | hfsplus_asc2uni(sb, &key->cat.name, str->name, str->len); | |
50 | len = be16_to_cpu(key->cat.name.length); | |
51 | } else { | |
52 | key->cat.name.length = 0; | |
53 | len = 0; | |
54 | } | |
55 | key->key_len = cpu_to_be16(6 + 2 * len); | |
56 | } | |
57 | ||
58 | static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent, | |
59 | struct hfsplus_unistr *name) | |
60 | { | |
61 | int ustrlen; | |
62 | ||
63 | ustrlen = be16_to_cpu(name->length); | |
64 | key->cat.parent = cpu_to_be32(parent); | |
65 | key->cat.name.length = cpu_to_be16(ustrlen); | |
66 | ustrlen *= 2; | |
67 | memcpy(key->cat.name.unicode, name->unicode, ustrlen); | |
68 | key->key_len = cpu_to_be16(6 + ustrlen); | |
69 | } | |
70 | ||
71 | static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms) | |
72 | { | |
73 | if (inode->i_flags & S_IMMUTABLE) | |
74 | perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; | |
75 | else | |
76 | perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; | |
77 | if (inode->i_flags & S_APPEND) | |
78 | perms->rootflags |= HFSPLUS_FLG_APPEND; | |
79 | else | |
80 | perms->rootflags &= ~HFSPLUS_FLG_APPEND; | |
81 | HFSPLUS_I(inode).rootflags = perms->rootflags; | |
82 | HFSPLUS_I(inode).userflags = perms->userflags; | |
83 | perms->mode = cpu_to_be16(inode->i_mode); | |
84 | perms->owner = cpu_to_be32(inode->i_uid); | |
85 | perms->group = cpu_to_be32(inode->i_gid); | |
86 | } | |
87 | ||
88 | static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode) | |
89 | { | |
90 | if (S_ISDIR(inode->i_mode)) { | |
91 | struct hfsplus_cat_folder *folder; | |
92 | ||
93 | folder = &entry->folder; | |
94 | memset(folder, 0, sizeof(*folder)); | |
95 | folder->type = cpu_to_be16(HFSPLUS_FOLDER); | |
96 | folder->id = cpu_to_be32(inode->i_ino); | |
9a4cad95 RZ |
97 | HFSPLUS_I(inode).create_date = |
98 | folder->create_date = | |
99 | folder->content_mod_date = | |
100 | folder->attribute_mod_date = | |
101 | folder->access_date = hfsp_now2mt(); | |
1da177e4 LT |
102 | hfsplus_set_perms(inode, &folder->permissions); |
103 | if (inode == HFSPLUS_SB(inode->i_sb).hidden_dir) | |
104 | /* invisible and namelocked */ | |
105 | folder->user_info.frFlags = cpu_to_be16(0x5000); | |
106 | return sizeof(*folder); | |
107 | } else { | |
108 | struct hfsplus_cat_file *file; | |
109 | ||
110 | file = &entry->file; | |
111 | memset(file, 0, sizeof(*file)); | |
112 | file->type = cpu_to_be16(HFSPLUS_FILE); | |
113 | file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); | |
114 | file->id = cpu_to_be32(cnid); | |
9a4cad95 RZ |
115 | HFSPLUS_I(inode).create_date = |
116 | file->create_date = | |
117 | file->content_mod_date = | |
118 | file->attribute_mod_date = | |
119 | file->access_date = hfsp_now2mt(); | |
1da177e4 LT |
120 | if (cnid == inode->i_ino) { |
121 | hfsplus_set_perms(inode, &file->permissions); | |
122 | file->user_info.fdType = cpu_to_be32(HFSPLUS_SB(inode->i_sb).type); | |
123 | file->user_info.fdCreator = cpu_to_be32(HFSPLUS_SB(inode->i_sb).creator); | |
124 | if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) | |
125 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); | |
126 | } else { | |
127 | file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE); | |
128 | file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR); | |
129 | file->user_info.fdFlags = cpu_to_be16(0x100); | |
af8c85bb | 130 | file->create_date = HFSPLUS_I(HFSPLUS_SB(inode->i_sb).hidden_dir).create_date; |
1da177e4 LT |
131 | file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode).dev); |
132 | } | |
133 | return sizeof(*file); | |
134 | } | |
135 | } | |
136 | ||
137 | static int hfsplus_fill_cat_thread(struct super_block *sb, | |
138 | hfsplus_cat_entry *entry, int type, | |
139 | u32 parentid, struct qstr *str) | |
140 | { | |
141 | entry->type = cpu_to_be16(type); | |
142 | entry->thread.reserved = 0; | |
143 | entry->thread.parentID = cpu_to_be32(parentid); | |
144 | hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len); | |
145 | return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; | |
146 | } | |
147 | ||
148 | /* Try to get a catalog entry for given catalog id */ | |
149 | int hfsplus_find_cat(struct super_block *sb, u32 cnid, | |
150 | struct hfs_find_data *fd) | |
151 | { | |
152 | hfsplus_cat_entry tmp; | |
153 | int err; | |
154 | u16 type; | |
155 | ||
156 | hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL); | |
157 | err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry)); | |
158 | if (err) | |
159 | return err; | |
160 | ||
161 | type = be16_to_cpu(tmp.type); | |
162 | if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { | |
634725a9 | 163 | printk(KERN_ERR "hfs: found bad thread record in catalog\n"); |
1da177e4 LT |
164 | return -EIO; |
165 | } | |
166 | ||
167 | hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), | |
168 | &tmp.thread.nodeName); | |
169 | return hfs_brec_find(fd); | |
170 | } | |
171 | ||
172 | int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode) | |
173 | { | |
174 | struct hfs_find_data fd; | |
175 | struct super_block *sb; | |
176 | hfsplus_cat_entry entry; | |
177 | int entry_size; | |
178 | int err; | |
179 | ||
180 | dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); | |
181 | sb = dir->i_sb; | |
182 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
183 | ||
184 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
185 | entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? | |
186 | HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, | |
187 | dir->i_ino, str); | |
188 | err = hfs_brec_find(&fd); | |
189 | if (err != -ENOENT) { | |
190 | if (!err) | |
191 | err = -EEXIST; | |
192 | goto err2; | |
193 | } | |
194 | err = hfs_brec_insert(&fd, &entry, entry_size); | |
195 | if (err) | |
196 | goto err2; | |
197 | ||
198 | hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); | |
199 | entry_size = hfsplus_cat_build_record(&entry, cnid, inode); | |
200 | err = hfs_brec_find(&fd); | |
201 | if (err != -ENOENT) { | |
202 | /* panic? */ | |
203 | if (!err) | |
204 | err = -EEXIST; | |
205 | goto err1; | |
206 | } | |
207 | err = hfs_brec_insert(&fd, &entry, entry_size); | |
208 | if (err) | |
209 | goto err1; | |
210 | ||
211 | dir->i_size++; | |
212 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
213 | mark_inode_dirty(dir); | |
214 | hfs_find_exit(&fd); | |
215 | return 0; | |
216 | ||
217 | err1: | |
218 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
219 | if (!hfs_brec_find(&fd)) | |
220 | hfs_brec_remove(&fd); | |
221 | err2: | |
222 | hfs_find_exit(&fd); | |
223 | return err; | |
224 | } | |
225 | ||
226 | int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) | |
227 | { | |
228 | struct super_block *sb; | |
229 | struct hfs_find_data fd; | |
230 | struct hfsplus_fork_raw fork; | |
231 | struct list_head *pos; | |
232 | int err, off; | |
233 | u16 type; | |
234 | ||
235 | dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); | |
236 | sb = dir->i_sb; | |
237 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
238 | ||
239 | if (!str) { | |
240 | int len; | |
241 | ||
242 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
243 | err = hfs_brec_find(&fd); | |
244 | if (err) | |
245 | goto out; | |
246 | ||
247 | off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); | |
248 | fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); | |
249 | hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); | |
250 | len = be16_to_cpu(fd.search_key->cat.name.length) * 2; | |
251 | hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); | |
252 | fd.search_key->key_len = cpu_to_be16(6 + len); | |
253 | } else | |
254 | hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); | |
255 | ||
256 | err = hfs_brec_find(&fd); | |
257 | if (err) | |
258 | goto out; | |
259 | ||
260 | type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); | |
261 | if (type == HFSPLUS_FILE) { | |
262 | #if 0 | |
263 | off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); | |
264 | hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); | |
265 | hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); | |
266 | #endif | |
267 | ||
268 | off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); | |
269 | hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); | |
270 | hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); | |
271 | } | |
272 | ||
273 | list_for_each(pos, &HFSPLUS_I(dir).open_dir_list) { | |
274 | struct hfsplus_readdir_data *rd = | |
275 | list_entry(pos, struct hfsplus_readdir_data, list); | |
276 | if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) | |
277 | rd->file->f_pos--; | |
278 | } | |
279 | ||
280 | err = hfs_brec_remove(&fd); | |
281 | if (err) | |
282 | goto out; | |
283 | ||
284 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
285 | err = hfs_brec_find(&fd); | |
286 | if (err) | |
287 | goto out; | |
288 | ||
289 | err = hfs_brec_remove(&fd); | |
290 | if (err) | |
291 | goto out; | |
292 | ||
293 | dir->i_size--; | |
294 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
295 | mark_inode_dirty(dir); | |
296 | out: | |
297 | hfs_find_exit(&fd); | |
298 | ||
299 | return err; | |
300 | } | |
301 | ||
302 | int hfsplus_rename_cat(u32 cnid, | |
303 | struct inode *src_dir, struct qstr *src_name, | |
304 | struct inode *dst_dir, struct qstr *dst_name) | |
305 | { | |
306 | struct super_block *sb; | |
307 | struct hfs_find_data src_fd, dst_fd; | |
308 | hfsplus_cat_entry entry; | |
309 | int entry_size, type; | |
310 | int err = 0; | |
311 | ||
312 | dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, | |
313 | dst_dir->i_ino, dst_name->name); | |
314 | sb = src_dir->i_sb; | |
315 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &src_fd); | |
316 | dst_fd = src_fd; | |
317 | ||
318 | /* find the old dir entry and read the data */ | |
319 | hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); | |
320 | err = hfs_brec_find(&src_fd); | |
321 | if (err) | |
322 | goto out; | |
323 | ||
324 | hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, | |
325 | src_fd.entrylength); | |
326 | ||
327 | /* create new dir entry with the data from the old entry */ | |
328 | hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); | |
329 | err = hfs_brec_find(&dst_fd); | |
330 | if (err != -ENOENT) { | |
331 | if (!err) | |
332 | err = -EEXIST; | |
333 | goto out; | |
334 | } | |
335 | ||
336 | err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); | |
337 | if (err) | |
338 | goto out; | |
339 | dst_dir->i_size++; | |
340 | dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; | |
341 | mark_inode_dirty(dst_dir); | |
342 | ||
343 | /* finally remove the old entry */ | |
344 | hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); | |
345 | err = hfs_brec_find(&src_fd); | |
346 | if (err) | |
347 | goto out; | |
348 | err = hfs_brec_remove(&src_fd); | |
349 | if (err) | |
350 | goto out; | |
351 | src_dir->i_size--; | |
352 | src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; | |
353 | mark_inode_dirty(src_dir); | |
354 | ||
355 | /* remove old thread entry */ | |
356 | hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); | |
357 | err = hfs_brec_find(&src_fd); | |
358 | if (err) | |
359 | goto out; | |
360 | type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); | |
361 | err = hfs_brec_remove(&src_fd); | |
362 | if (err) | |
363 | goto out; | |
364 | ||
365 | /* create new thread entry */ | |
366 | hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); | |
367 | entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name); | |
368 | err = hfs_brec_find(&dst_fd); | |
369 | if (err != -ENOENT) { | |
370 | if (!err) | |
371 | err = -EEXIST; | |
372 | goto out; | |
373 | } | |
374 | err = hfs_brec_insert(&dst_fd, &entry, entry_size); | |
375 | out: | |
376 | hfs_bnode_put(dst_fd.bnode); | |
377 | hfs_find_exit(&src_fd); | |
378 | return err; | |
379 | } |