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
12 #include "hfsplus_fs.h"
13 #include "hfsplus_raw.h"
14
hfsplus_cat_case_cmp_key(const hfsplus_btree_key * k1,const hfsplus_btree_key * k2)15 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1,
16 const hfsplus_btree_key *k2)
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
25 return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name);
26 }
27
hfsplus_cat_bin_cmp_key(const hfsplus_btree_key * k1,const hfsplus_btree_key * k2)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);
39 }
40
hfsplus_cat_build_key(struct super_block * sb,hfsplus_btree_key * key,u32 parent,struct qstr * str)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
hfsplus_cat_build_key_uni(hfsplus_btree_key * key,u32 parent,struct hfsplus_unistr * name)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
hfsplus_cat_set_perms(struct inode * inode,struct hfsplus_perm * perms)70 void hfsplus_cat_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
81 perms->userflags = HFSPLUS_I(inode)->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 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;
92 }
93
hfsplus_cat_build_record(hfsplus_cat_entry * entry,u32 cnid,struct inode * inode)94 static int hfsplus_cat_build_record(hfsplus_cat_entry *entry,
95 u32 cnid, struct inode *inode)
96 {
97 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
98
99 if (S_ISDIR(inode->i_mode)) {
100 struct hfsplus_cat_folder *folder;
101
102 folder = &entry->folder;
103 memset(folder, 0, sizeof(*folder));
104 folder->type = cpu_to_be16(HFSPLUS_FOLDER);
105 folder->id = cpu_to_be32(inode->i_ino);
106 HFSPLUS_I(inode)->create_date =
107 folder->create_date =
108 folder->content_mod_date =
109 folder->attribute_mod_date =
110 folder->access_date = hfsp_now2mt();
111 hfsplus_cat_set_perms(inode, &folder->permissions);
112 if (inode == sbi->hidden_dir)
113 /* invisible and namelocked */
114 folder->user_info.frFlags = cpu_to_be16(0x5000);
115 return sizeof(*folder);
116 } else {
117 struct hfsplus_cat_file *file;
118
119 file = &entry->file;
120 memset(file, 0, sizeof(*file));
121 file->type = cpu_to_be16(HFSPLUS_FILE);
122 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS);
123 file->id = cpu_to_be32(cnid);
124 HFSPLUS_I(inode)->create_date =
125 file->create_date =
126 file->content_mod_date =
127 file->attribute_mod_date =
128 file->access_date = hfsp_now2mt();
129 if (cnid == inode->i_ino) {
130 hfsplus_cat_set_perms(inode, &file->permissions);
131 if (S_ISLNK(inode->i_mode)) {
132 file->user_info.fdType =
133 cpu_to_be32(HFSP_SYMLINK_TYPE);
134 file->user_info.fdCreator =
135 cpu_to_be32(HFSP_SYMLINK_CREATOR);
136 } else {
137 file->user_info.fdType =
138 cpu_to_be32(sbi->type);
139 file->user_info.fdCreator =
140 cpu_to_be32(sbi->creator);
141 }
142 if (HFSPLUS_FLG_IMMUTABLE &
143 (file->permissions.rootflags |
144 file->permissions.userflags))
145 file->flags |=
146 cpu_to_be16(HFSPLUS_FILE_LOCKED);
147 } else {
148 file->user_info.fdType =
149 cpu_to_be32(HFSP_HARDLINK_TYPE);
150 file->user_info.fdCreator =
151 cpu_to_be32(HFSP_HFSPLUS_CREATOR);
152 file->user_info.fdFlags =
153 cpu_to_be16(0x100);
154 file->create_date =
155 HFSPLUS_I(sbi->hidden_dir)->create_date;
156 file->permissions.dev =
157 cpu_to_be32(HFSPLUS_I(inode)->linkid);
158 }
159 return sizeof(*file);
160 }
161 }
162
hfsplus_fill_cat_thread(struct super_block * sb,hfsplus_cat_entry * entry,int type,u32 parentid,struct qstr * str)163 static int hfsplus_fill_cat_thread(struct super_block *sb,
164 hfsplus_cat_entry *entry, int type,
165 u32 parentid, struct qstr *str)
166 {
167 entry->type = cpu_to_be16(type);
168 entry->thread.reserved = 0;
169 entry->thread.parentID = cpu_to_be32(parentid);
170 hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len);
171 return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
172 }
173
174 /* Try to get a catalog entry for given catalog id */
hfsplus_find_cat(struct super_block * sb,u32 cnid,struct hfs_find_data * fd)175 int hfsplus_find_cat(struct super_block *sb, u32 cnid,
176 struct hfs_find_data *fd)
177 {
178 hfsplus_cat_entry tmp;
179 int err;
180 u16 type;
181
182 hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL);
183 err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry));
184 if (err)
185 return err;
186
187 type = be16_to_cpu(tmp.type);
188 if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) {
189 printk(KERN_ERR "hfs: found bad thread record in catalog\n");
190 return -EIO;
191 }
192
193 if (be16_to_cpu(tmp.thread.nodeName.length) > 255) {
194 printk(KERN_ERR "hfs: catalog name length corrupted\n");
195 return -EIO;
196 }
197
198 hfsplus_cat_build_key_uni(fd->search_key,
199 be32_to_cpu(tmp.thread.parentID),
200 &tmp.thread.nodeName);
201 return hfs_brec_find(fd);
202 }
203
hfsplus_create_cat(u32 cnid,struct inode * dir,struct qstr * str,struct inode * inode)204 int hfsplus_create_cat(u32 cnid, struct inode *dir,
205 struct qstr *str, struct inode *inode)
206 {
207 struct super_block *sb = dir->i_sb;
208 struct hfs_find_data fd;
209 hfsplus_cat_entry entry;
210 int entry_size;
211 int err;
212
213 dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n",
214 str->name, cnid, inode->i_nlink);
215 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
216 if (err)
217 return err;
218
219 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
220 entry_size = hfsplus_fill_cat_thread(sb, &entry,
221 S_ISDIR(inode->i_mode) ?
222 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
223 dir->i_ino, str);
224 err = hfs_brec_find(&fd);
225 if (err != -ENOENT) {
226 if (!err)
227 err = -EEXIST;
228 goto err2;
229 }
230 err = hfs_brec_insert(&fd, &entry, entry_size);
231 if (err)
232 goto err2;
233
234 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
235 entry_size = hfsplus_cat_build_record(&entry, cnid, inode);
236 err = hfs_brec_find(&fd);
237 if (err != -ENOENT) {
238 /* panic? */
239 if (!err)
240 err = -EEXIST;
241 goto err1;
242 }
243 err = hfs_brec_insert(&fd, &entry, entry_size);
244 if (err)
245 goto err1;
246
247 dir->i_size++;
248 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
249 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
250
251 hfs_find_exit(&fd);
252 return 0;
253
254 err1:
255 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
256 if (!hfs_brec_find(&fd))
257 hfs_brec_remove(&fd);
258 err2:
259 hfs_find_exit(&fd);
260 return err;
261 }
262
hfsplus_delete_cat(u32 cnid,struct inode * dir,struct qstr * str)263 int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
264 {
265 struct super_block *sb = dir->i_sb;
266 struct hfs_find_data fd;
267 struct hfsplus_fork_raw fork;
268 struct list_head *pos;
269 int err, off;
270 u16 type;
271
272 dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n",
273 str ? str->name : NULL, cnid);
274 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
275 if (err)
276 return err;
277
278 if (!str) {
279 int len;
280
281 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
282 err = hfs_brec_find(&fd);
283 if (err)
284 goto out;
285
286 off = fd.entryoffset +
287 offsetof(struct hfsplus_cat_thread, nodeName);
288 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino);
289 hfs_bnode_read(fd.bnode,
290 &fd.search_key->cat.name.length, off, 2);
291 len = be16_to_cpu(fd.search_key->cat.name.length) * 2;
292 hfs_bnode_read(fd.bnode,
293 &fd.search_key->cat.name.unicode,
294 off + 2, len);
295 fd.search_key->key_len = cpu_to_be16(6 + len);
296 } else
297 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
298
299 err = hfs_brec_find(&fd);
300 if (err)
301 goto out;
302
303 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
304 if (type == HFSPLUS_FILE) {
305 #if 0
306 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork);
307 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
308 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA);
309 #endif
310
311 off = fd.entryoffset +
312 offsetof(struct hfsplus_cat_file, rsrc_fork);
313 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
314 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC);
315 }
316
317 list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) {
318 struct hfsplus_readdir_data *rd =
319 list_entry(pos, struct hfsplus_readdir_data, list);
320 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0)
321 rd->file->f_pos--;
322 }
323
324 err = hfs_brec_remove(&fd);
325 if (err)
326 goto out;
327
328 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
329 err = hfs_brec_find(&fd);
330 if (err)
331 goto out;
332
333 err = hfs_brec_remove(&fd);
334 if (err)
335 goto out;
336
337 dir->i_size--;
338 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
339 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
340 out:
341 hfs_find_exit(&fd);
342
343 return err;
344 }
345
hfsplus_rename_cat(u32 cnid,struct inode * src_dir,struct qstr * src_name,struct inode * dst_dir,struct qstr * dst_name)346 int hfsplus_rename_cat(u32 cnid,
347 struct inode *src_dir, struct qstr *src_name,
348 struct inode *dst_dir, struct qstr *dst_name)
349 {
350 struct super_block *sb = src_dir->i_sb;
351 struct hfs_find_data src_fd, dst_fd;
352 hfsplus_cat_entry entry;
353 int entry_size, type;
354 int err;
355
356 dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n",
357 cnid, src_dir->i_ino, src_name->name,
358 dst_dir->i_ino, dst_name->name);
359 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd);
360 if (err)
361 return err;
362 dst_fd = src_fd;
363
364 /* find the old dir entry and read the data */
365 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
366 err = hfs_brec_find(&src_fd);
367 if (err)
368 goto out;
369 if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) {
370 err = -EIO;
371 goto out;
372 }
373
374 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
375 src_fd.entrylength);
376
377 /* create new dir entry with the data from the old entry */
378 hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name);
379 err = hfs_brec_find(&dst_fd);
380 if (err != -ENOENT) {
381 if (!err)
382 err = -EEXIST;
383 goto out;
384 }
385
386 err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength);
387 if (err)
388 goto out;
389 dst_dir->i_size++;
390 dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC;
391
392 /* finally remove the old entry */
393 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
394 err = hfs_brec_find(&src_fd);
395 if (err)
396 goto out;
397 err = hfs_brec_remove(&src_fd);
398 if (err)
399 goto out;
400 src_dir->i_size--;
401 src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC;
402
403 /* remove old thread entry */
404 hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL);
405 err = hfs_brec_find(&src_fd);
406 if (err)
407 goto out;
408 type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
409 err = hfs_brec_remove(&src_fd);
410 if (err)
411 goto out;
412
413 /* create new thread entry */
414 hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL);
415 entry_size = hfsplus_fill_cat_thread(sb, &entry, type,
416 dst_dir->i_ino, dst_name);
417 err = hfs_brec_find(&dst_fd);
418 if (err != -ENOENT) {
419 if (!err)
420 err = -EEXIST;
421 goto out;
422 }
423 err = hfs_brec_insert(&dst_fd, &entry, entry_size);
424
425 hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY);
426 hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY);
427 out:
428 hfs_bnode_put(dst_fd.bnode);
429 hfs_find_exit(&src_fd);
430 return err;
431 }
432