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Linux 4.9.112
[linux/fpc-iii.git] / fs / hfsplus / catalog.c
bloba5e00f7a4c1434ba9d5718935c213fe0c2158868
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
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
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
41 /* Generates key for catalog file/folders record. */
42 int hfsplus_cat_build_key(struct super_block *sb,
43 hfsplus_btree_key *key, u32 parent, const struct qstr *str)
44 {
45 int len, err;
46
47 key->cat.parent = cpu_to_be32(parent);
48 err = hfsplus_asc2uni(sb, &key->cat.name, HFSPLUS_MAX_STRLEN,
49 str->name, str->len);
50 if (unlikely(err < 0))
51 return err;
52
53 len = be16_to_cpu(key->cat.name.length);
54 key->key_len = cpu_to_be16(6 + 2 * len);
55 return 0;
56 }
57
58 /* Generates key for catalog thread record. */
59 void hfsplus_cat_build_key_with_cnid(struct super_block *sb,
60 hfsplus_btree_key *key, u32 parent)
61 {
62 key->cat.parent = cpu_to_be32(parent);
63 key->cat.name.length = 0;
64 key->key_len = cpu_to_be16(6);
65 }
66
67 static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent,
68 struct hfsplus_unistr *name)
69 {
70 int ustrlen;
71
72 ustrlen = be16_to_cpu(name->length);
73 key->cat.parent = cpu_to_be32(parent);
74 key->cat.name.length = cpu_to_be16(ustrlen);
75 ustrlen *= 2;
76 memcpy(key->cat.name.unicode, name->unicode, ustrlen);
77 key->key_len = cpu_to_be16(6 + ustrlen);
78 }
79
80 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms)
81 {
82 if (inode->i_flags & S_IMMUTABLE)
83 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
84 else
85 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
86 if (inode->i_flags & S_APPEND)
87 perms->rootflags |= HFSPLUS_FLG_APPEND;
88 else
89 perms->rootflags &= ~HFSPLUS_FLG_APPEND;
90
91 perms->userflags = HFSPLUS_I(inode)->userflags;
92 perms->mode = cpu_to_be16(inode->i_mode);
93 perms->owner = cpu_to_be32(i_uid_read(inode));
94 perms->group = cpu_to_be32(i_gid_read(inode));
95
96 if (S_ISREG(inode->i_mode))
97 perms->dev = cpu_to_be32(inode->i_nlink);
98 else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode))
99 perms->dev = cpu_to_be32(inode->i_rdev);
100 else
101 perms->dev = 0;
102 }
103
104 static int hfsplus_cat_build_record(hfsplus_cat_entry *entry,
105 u32 cnid, struct inode *inode)
106 {
107 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
108
109 if (S_ISDIR(inode->i_mode)) {
110 struct hfsplus_cat_folder *folder;
111
112 folder = &entry->folder;
113 memset(folder, 0, sizeof(*folder));
114 folder->type = cpu_to_be16(HFSPLUS_FOLDER);
115 if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags))
116 folder->flags |= cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT);
117 folder->id = cpu_to_be32(inode->i_ino);
118 HFSPLUS_I(inode)->create_date =
119 folder->create_date =
120 folder->content_mod_date =
121 folder->attribute_mod_date =
122 folder->access_date = hfsp_now2mt();
123 hfsplus_cat_set_perms(inode, &folder->permissions);
124 if (inode == sbi->hidden_dir)
125 /* invisible and namelocked */
126 folder->user_info.frFlags = cpu_to_be16(0x5000);
127 return sizeof(*folder);
128 } else {
129 struct hfsplus_cat_file *file;
130
131 file = &entry->file;
132 memset(file, 0, sizeof(*file));
133 file->type = cpu_to_be16(HFSPLUS_FILE);
134 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS);
135 file->id = cpu_to_be32(cnid);
136 HFSPLUS_I(inode)->create_date =
137 file->create_date =
138 file->content_mod_date =
139 file->attribute_mod_date =
140 file->access_date = hfsp_now2mt();
141 if (cnid == inode->i_ino) {
142 hfsplus_cat_set_perms(inode, &file->permissions);
143 if (S_ISLNK(inode->i_mode)) {
144 file->user_info.fdType =
145 cpu_to_be32(HFSP_SYMLINK_TYPE);
146 file->user_info.fdCreator =
147 cpu_to_be32(HFSP_SYMLINK_CREATOR);
148 } else {
149 file->user_info.fdType =
150 cpu_to_be32(sbi->type);
151 file->user_info.fdCreator =
152 cpu_to_be32(sbi->creator);
153 }
154 if (HFSPLUS_FLG_IMMUTABLE &
155 (file->permissions.rootflags |
156 file->permissions.userflags))
157 file->flags |=
158 cpu_to_be16(HFSPLUS_FILE_LOCKED);
159 } else {
160 file->user_info.fdType =
161 cpu_to_be32(HFSP_HARDLINK_TYPE);
162 file->user_info.fdCreator =
163 cpu_to_be32(HFSP_HFSPLUS_CREATOR);
164 file->user_info.fdFlags =
165 cpu_to_be16(0x100);
166 file->create_date =
167 HFSPLUS_I(sbi->hidden_dir)->create_date;
168 file->permissions.dev =
169 cpu_to_be32(HFSPLUS_I(inode)->linkid);
170 }
171 return sizeof(*file);
172 }
173 }
174
175 static int hfsplus_fill_cat_thread(struct super_block *sb,
176 hfsplus_cat_entry *entry, int type,
177 u32 parentid, const struct qstr *str)
178 {
179 int err;
180
181 entry->type = cpu_to_be16(type);
182 entry->thread.reserved = 0;
183 entry->thread.parentID = cpu_to_be32(parentid);
184 err = hfsplus_asc2uni(sb, &entry->thread.nodeName, HFSPLUS_MAX_STRLEN,
185 str->name, str->len);
186 if (unlikely(err < 0))
187 return err;
188
189 return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
190 }
191
192 /* Try to get a catalog entry for given catalog id */
193 int hfsplus_find_cat(struct super_block *sb, u32 cnid,
194 struct hfs_find_data *fd)
195 {
196 hfsplus_cat_entry tmp;
197 int err;
198 u16 type;
199
200 hfsplus_cat_build_key_with_cnid(sb, fd->search_key, cnid);
201 err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry));
202 if (err)
203 return err;
204
205 type = be16_to_cpu(tmp.type);
206 if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) {
207 pr_err("found bad thread record in catalog\n");
208 return -EIO;
209 }
210
211 if (be16_to_cpu(tmp.thread.nodeName.length) > 255) {
212 pr_err("catalog name length corrupted\n");
213 return -EIO;
214 }
215
216 hfsplus_cat_build_key_uni(fd->search_key,
217 be32_to_cpu(tmp.thread.parentID),
218 &tmp.thread.nodeName);
219 return hfs_brec_find(fd, hfs_find_rec_by_key);
220 }
221
222 static void hfsplus_subfolders_inc(struct inode *dir)
223 {
224 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
225
226 if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) {
227 /*
228 * Increment subfolder count. Note, the value is only meaningful
229 * for folders with HFSPLUS_HAS_FOLDER_COUNT flag set.
230 */
231 HFSPLUS_I(dir)->subfolders++;
232 }
233 }
234
235 static void hfsplus_subfolders_dec(struct inode *dir)
236 {
237 struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
238
239 if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) {
240 /*
241 * Decrement subfolder count. Note, the value is only meaningful
242 * for folders with HFSPLUS_HAS_FOLDER_COUNT flag set.
243 *
244 * Check for zero. Some subfolders may have been created
245 * by an implementation ignorant of this counter.
246 */
247 if (HFSPLUS_I(dir)->subfolders)
248 HFSPLUS_I(dir)->subfolders--;
249 }
250 }
251
252 int hfsplus_create_cat(u32 cnid, struct inode *dir,
253 const struct qstr *str, struct inode *inode)
254 {
255 struct super_block *sb = dir->i_sb;
256 struct hfs_find_data fd;
257 hfsplus_cat_entry entry;
258 int entry_size;
259 int err;
260
261 hfs_dbg(CAT_MOD, "create_cat: %s,%u(%d)\n",
262 str->name, cnid, inode->i_nlink);
263 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
264 if (err)
265 return err;
266
267 hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
268 entry_size = hfsplus_fill_cat_thread(sb, &entry,
269 S_ISDIR(inode->i_mode) ?
270 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
271 dir->i_ino, str);
272 if (unlikely(entry_size < 0)) {
273 err = entry_size;
274 goto err2;
275 }
276
277 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
278 if (err != -ENOENT) {
279 if (!err)
280 err = -EEXIST;
281 goto err2;
282 }
283 err = hfs_brec_insert(&fd, &entry, entry_size);
284 if (err)
285 goto err2;
286
287 err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
288 if (unlikely(err))
289 goto err1;
290
291 entry_size = hfsplus_cat_build_record(&entry, cnid, inode);
292 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
293 if (err != -ENOENT) {
294 /* panic? */
295 if (!err)
296 err = -EEXIST;
297 goto err1;
298 }
299 err = hfs_brec_insert(&fd, &entry, entry_size);
300 if (err)
301 goto err1;
302
303 dir->i_size++;
304 if (S_ISDIR(inode->i_mode))
305 hfsplus_subfolders_inc(dir);
306 dir->i_mtime = dir->i_ctime = current_time(dir);
307 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
308
309 hfs_find_exit(&fd);
310 return 0;
311
312 err1:
313 hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
314 if (!hfs_brec_find(&fd, hfs_find_rec_by_key))
315 hfs_brec_remove(&fd);
316 err2:
317 hfs_find_exit(&fd);
318 return err;
319 }
320
321 int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str)
322 {
323 struct super_block *sb = dir->i_sb;
324 struct hfs_find_data fd;
325 struct hfsplus_fork_raw fork;
326 struct list_head *pos;
327 int err, off;
328 u16 type;
329
330 hfs_dbg(CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid);
331 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
332 if (err)
333 return err;
334
335 if (!str) {
336 int len;
337
338 hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
339 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
340 if (err)
341 goto out;
342
343 off = fd.entryoffset +
344 offsetof(struct hfsplus_cat_thread, nodeName);
345 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino);
346 hfs_bnode_read(fd.bnode,
347 &fd.search_key->cat.name.length, off, 2);
348 len = be16_to_cpu(fd.search_key->cat.name.length) * 2;
349 hfs_bnode_read(fd.bnode,
350 &fd.search_key->cat.name.unicode,
351 off + 2, len);
352 fd.search_key->key_len = cpu_to_be16(6 + len);
353 } else {
354 err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
355 if (unlikely(err))
356 goto out;
357 }
358
359 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
360 if (err)
361 goto out;
362
363 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
364 if (type == HFSPLUS_FILE) {
365 #if 0
366 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork);
367 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
368 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA);
369 #endif
370
371 off = fd.entryoffset +
372 offsetof(struct hfsplus_cat_file, rsrc_fork);
373 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
374 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC);
375 }
376
377 /* we only need to take spinlock for exclusion with ->release() */
378 spin_lock(&HFSPLUS_I(dir)->open_dir_lock);
379 list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) {
380 struct hfsplus_readdir_data *rd =
381 list_entry(pos, struct hfsplus_readdir_data, list);
382 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0)
383 rd->file->f_pos--;
384 }
385 spin_unlock(&HFSPLUS_I(dir)->open_dir_lock);
386
387 err = hfs_brec_remove(&fd);
388 if (err)
389 goto out;
390
391 hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
392 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
393 if (err)
394 goto out;
395
396 err = hfs_brec_remove(&fd);
397 if (err)
398 goto out;
399
400 dir->i_size--;
401 if (type == HFSPLUS_FOLDER)
402 hfsplus_subfolders_dec(dir);
403 dir->i_mtime = dir->i_ctime = current_time(dir);
404 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
405
406 if (type == HFSPLUS_FILE || type == HFSPLUS_FOLDER) {
407 if (HFSPLUS_SB(sb)->attr_tree)
408 hfsplus_delete_all_attrs(dir, cnid);
409 }
410
411 out:
412 hfs_find_exit(&fd);
413
414 return err;
415 }
416
417 int hfsplus_rename_cat(u32 cnid,
418 struct inode *src_dir, const struct qstr *src_name,
419 struct inode *dst_dir, const struct qstr *dst_name)
420 {
421 struct super_block *sb = src_dir->i_sb;
422 struct hfs_find_data src_fd, dst_fd;
423 hfsplus_cat_entry entry;
424 int entry_size, type;
425 int err;
426
427 hfs_dbg(CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n",
428 cnid, src_dir->i_ino, src_name->name,
429 dst_dir->i_ino, dst_name->name);
430 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd);
431 if (err)
432 return err;
433 dst_fd = src_fd;
434
435 /* find the old dir entry and read the data */
436 err = hfsplus_cat_build_key(sb, src_fd.search_key,
437 src_dir->i_ino, src_name);
438 if (unlikely(err))
439 goto out;
440
441 err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
442 if (err)
443 goto out;
444 if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) {
445 err = -EIO;
446 goto out;
447 }
448
449 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
450 src_fd.entrylength);
451 type = be16_to_cpu(entry.type);
452
453 /* create new dir entry with the data from the old entry */
454 err = hfsplus_cat_build_key(sb, dst_fd.search_key,
455 dst_dir->i_ino, dst_name);
456 if (unlikely(err))
457 goto out;
458
459 err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
460 if (err != -ENOENT) {
461 if (!err)
462 err = -EEXIST;
463 goto out;
464 }
465
466 err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength);
467 if (err)
468 goto out;
469 dst_dir->i_size++;
470 if (type == HFSPLUS_FOLDER)
471 hfsplus_subfolders_inc(dst_dir);
472 dst_dir->i_mtime = dst_dir->i_ctime = current_time(dst_dir);
473
474 /* finally remove the old entry */
475 err = hfsplus_cat_build_key(sb, src_fd.search_key,
476 src_dir->i_ino, src_name);
477 if (unlikely(err))
478 goto out;
479
480 err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
481 if (err)
482 goto out;
483 err = hfs_brec_remove(&src_fd);
484 if (err)
485 goto out;
486 src_dir->i_size--;
487 if (type == HFSPLUS_FOLDER)
488 hfsplus_subfolders_dec(src_dir);
489 src_dir->i_mtime = src_dir->i_ctime = current_time(src_dir);
490
491 /* remove old thread entry */
492 hfsplus_cat_build_key_with_cnid(sb, src_fd.search_key, cnid);
493 err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
494 if (err)
495 goto out;
496 type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
497 err = hfs_brec_remove(&src_fd);
498 if (err)
499 goto out;
500
501 /* create new thread entry */
502 hfsplus_cat_build_key_with_cnid(sb, dst_fd.search_key, cnid);
503 entry_size = hfsplus_fill_cat_thread(sb, &entry, type,
504 dst_dir->i_ino, dst_name);
505 if (unlikely(entry_size < 0)) {
506 err = entry_size;
507 goto out;
508 }
509
510 err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
511 if (err != -ENOENT) {
512 if (!err)
513 err = -EEXIST;
514 goto out;
515 }
516 err = hfs_brec_insert(&dst_fd, &entry, entry_size);
517
518 hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY);
519 hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY);
520 out:
521 hfs_bnode_put(dst_fd.bnode);
522 hfs_find_exit(&src_fd);
523 return err;
524 }
Linux with added FPC-III support