projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:


968ce411db53e807b6f3b0fd216cd6730f226b5d
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / hfsplus / catalog.c
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 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, HFSPLUS_MAX_STRLEN,
49 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 void hfsplus_cat_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
82 perms->userflags = HFSPLUS_I(inode)->userflags;
83 perms->mode = cpu_to_be16(inode->i_mode);
84 perms->owner = cpu_to_be32(i_uid_read(inode));
85 perms->group = cpu_to_be32(i_gid_read(inode));
86
87 if (S_ISREG(inode->i_mode))
88 perms->dev = cpu_to_be32(inode->i_nlink);
89 else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode))
90 perms->dev = cpu_to_be32(inode->i_rdev);
91 else
92 perms->dev = 0;
93 }
94
95 static int hfsplus_cat_build_record(hfsplus_cat_entry *entry,
96 u32 cnid, struct inode *inode)
97 {
98 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
99
100 if (S_ISDIR(inode->i_mode)) {
101 struct hfsplus_cat_folder *folder;
102
103 folder = &entry->folder;
104 memset(folder, 0, sizeof(*folder));
105 folder->type = cpu_to_be16(HFSPLUS_FOLDER);
106 folder->id = cpu_to_be32(inode->i_ino);
107 HFSPLUS_I(inode)->create_date =
108 folder->create_date =
109 folder->content_mod_date =
110 folder->attribute_mod_date =
111 folder->access_date = hfsp_now2mt();
112 hfsplus_cat_set_perms(inode, &folder->permissions);
113 if (inode == sbi->hidden_dir)
114 /* invisible and namelocked */
115 folder->user_info.frFlags = cpu_to_be16(0x5000);
116 return sizeof(*folder);
117 } else {
118 struct hfsplus_cat_file *file;
119
120 file = &entry->file;
121 memset(file, 0, sizeof(*file));
122 file->type = cpu_to_be16(HFSPLUS_FILE);
123 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS);
124 file->id = cpu_to_be32(cnid);
125 HFSPLUS_I(inode)->create_date =
126 file->create_date =
127 file->content_mod_date =
128 file->attribute_mod_date =
129 file->access_date = hfsp_now2mt();
130 if (cnid == inode->i_ino) {
131 hfsplus_cat_set_perms(inode, &file->permissions);
132 if (S_ISLNK(inode->i_mode)) {
133 file->user_info.fdType =
134 cpu_to_be32(HFSP_SYMLINK_TYPE);
135 file->user_info.fdCreator =
136 cpu_to_be32(HFSP_SYMLINK_CREATOR);
137 } else {
138 file->user_info.fdType =
139 cpu_to_be32(sbi->type);
140 file->user_info.fdCreator =
141 cpu_to_be32(sbi->creator);
142 }
143 if (HFSPLUS_FLG_IMMUTABLE &
144 (file->permissions.rootflags |
145 file->permissions.userflags))
146 file->flags |=
147 cpu_to_be16(HFSPLUS_FILE_LOCKED);
148 } else {
149 file->user_info.fdType =
150 cpu_to_be32(HFSP_HARDLINK_TYPE);
151 file->user_info.fdCreator =
152 cpu_to_be32(HFSP_HFSPLUS_CREATOR);
153 file->user_info.fdFlags =
154 cpu_to_be16(0x100);
155 file->create_date =
156 HFSPLUS_I(sbi->hidden_dir)->create_date;
157 file->permissions.dev =
158 cpu_to_be32(HFSPLUS_I(inode)->linkid);
159 }
160 return sizeof(*file);
161 }
162 }
163
164 static int hfsplus_fill_cat_thread(struct super_block *sb,
165 hfsplus_cat_entry *entry, int type,
166 u32 parentid, struct qstr *str)
167 {
168 entry->type = cpu_to_be16(type);
169 entry->thread.reserved = 0;
170 entry->thread.parentID = cpu_to_be32(parentid);
171 hfsplus_asc2uni(sb, &entry->thread.nodeName, HFSPLUS_MAX_STRLEN,
172 str->name, str->len);
173 return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
174 }
175
176 /* Try to get a catalog entry for given catalog id */
177 int hfsplus_find_cat(struct super_block *sb, u32 cnid,
178 struct hfs_find_data *fd)
179 {
180 hfsplus_cat_entry tmp;
181 int err;
182 u16 type;
183
184 hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL);
185 err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry));
186 if (err)
187 return err;
188
189 type = be16_to_cpu(tmp.type);
190 if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) {
191 pr_err("found bad thread record in catalog\n");
192 return -EIO;
193 }
194
195 if (be16_to_cpu(tmp.thread.nodeName.length) > 255) {
196 pr_err("catalog name length corrupted\n");
197 return -EIO;
198 }
199
200 hfsplus_cat_build_key_uni(fd->search_key,
201 be32_to_cpu(tmp.thread.parentID),
202 &tmp.thread.nodeName);
203 return hfs_brec_find(fd, hfs_find_rec_by_key);
204 }
205
206 int hfsplus_create_cat(u32 cnid, struct inode *dir,
207 struct qstr *str, struct inode *inode)
208 {
209 struct super_block *sb = dir->i_sb;
210 struct hfs_find_data fd;
211 hfsplus_cat_entry entry;
212 int entry_size;
213 int err;
214
215 hfs_dbg(CAT_MOD, "create_cat: %s,%u(%d)\n",
216 str->name, cnid, inode->i_nlink);
217 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
218 if (err)
219 return err;
220
221 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
222 entry_size = hfsplus_fill_cat_thread(sb, &entry,
223 S_ISDIR(inode->i_mode) ?
224 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
225 dir->i_ino, str);
226 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
227 if (err != -ENOENT) {
228 if (!err)
229 err = -EEXIST;
230 goto err2;
231 }
232 err = hfs_brec_insert(&fd, &entry, entry_size);
233 if (err)
234 goto err2;
235
236 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
237 entry_size = hfsplus_cat_build_record(&entry, cnid, inode);
238 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
239 if (err != -ENOENT) {
240 /* panic? */
241 if (!err)
242 err = -EEXIST;
243 goto err1;
244 }
245 err = hfs_brec_insert(&fd, &entry, entry_size);
246 if (err)
247 goto err1;
248
249 dir->i_size++;
250 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
251 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
252
253 hfs_find_exit(&fd);
254 return 0;
255
256 err1:
257 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
258 if (!hfs_brec_find(&fd, hfs_find_rec_by_key))
259 hfs_brec_remove(&fd);
260 err2:
261 hfs_find_exit(&fd);
262 return err;
263 }
264
265 int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
266 {
267 struct super_block *sb = dir->i_sb;
268 struct hfs_find_data fd;
269 struct hfsplus_fork_raw fork;
270 struct list_head *pos;
271 int err, off;
272 u16 type;
273
274 hfs_dbg(CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid);
275 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
276 if (err)
277 return err;
278
279 if (!str) {
280 int len;
281
282 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
283 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
284 if (err)
285 goto out;
286
287 off = fd.entryoffset +
288 offsetof(struct hfsplus_cat_thread, nodeName);
289 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino);
290 hfs_bnode_read(fd.bnode,
291 &fd.search_key->cat.name.length, off, 2);
292 len = be16_to_cpu(fd.search_key->cat.name.length) * 2;
293 hfs_bnode_read(fd.bnode,
294 &fd.search_key->cat.name.unicode,
295 off + 2, len);
296 fd.search_key->key_len = cpu_to_be16(6 + len);
297 } else
298 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
299
300 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
301 if (err)
302 goto out;
303
304 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
305 if (type == HFSPLUS_FILE) {
306 #if 0
307 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork);
308 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
309 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA);
310 #endif
311
312 off = fd.entryoffset +
313 offsetof(struct hfsplus_cat_file, rsrc_fork);
314 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
315 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC);
316 }
317
318 list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) {
319 struct hfsplus_readdir_data *rd =
320 list_entry(pos, struct hfsplus_readdir_data, list);
321 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0)
322 rd->file->f_pos--;
323 }
324
325 err = hfs_brec_remove(&fd);
326 if (err)
327 goto out;
328
329 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
330 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
331 if (err)
332 goto out;
333
334 err = hfs_brec_remove(&fd);
335 if (err)
336 goto out;
337
338 dir->i_size--;
339 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
340 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
341
342 if (type == HFSPLUS_FILE || type == HFSPLUS_FOLDER) {
343 if (HFSPLUS_SB(sb)->attr_tree)
344 hfsplus_delete_all_attrs(dir, cnid);
345 }
346
347 out:
348 hfs_find_exit(&fd);
349
350 return err;
351 }
352
353 int hfsplus_rename_cat(u32 cnid,
354 struct inode *src_dir, struct qstr *src_name,
355 struct inode *dst_dir, struct qstr *dst_name)
356 {
357 struct super_block *sb = src_dir->i_sb;
358 struct hfs_find_data src_fd, dst_fd;
359 hfsplus_cat_entry entry;
360 int entry_size, type;
361 int err;
362
363 hfs_dbg(CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n",
364 cnid, src_dir->i_ino, src_name->name,
365 dst_dir->i_ino, dst_name->name);
366 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd);
367 if (err)
368 return err;
369 dst_fd = src_fd;
370
371 /* find the old dir entry and read the data */
372 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
373 err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
374 if (err)
375 goto out;
376 if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) {
377 err = -EIO;
378 goto out;
379 }
380
381 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
382 src_fd.entrylength);
383
384 /* create new dir entry with the data from the old entry */
385 hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name);
386 err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
387 if (err != -ENOENT) {
388 if (!err)
389 err = -EEXIST;
390 goto out;
391 }
392
393 err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength);
394 if (err)
395 goto out;
396 dst_dir->i_size++;
397 dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC;
398
399 /* finally remove the old entry */
400 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
401 err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
402 if (err)
403 goto out;
404 err = hfs_brec_remove(&src_fd);
405 if (err)
406 goto out;
407 src_dir->i_size--;
408 src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC;
409
410 /* remove old thread entry */
411 hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL);
412 err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
413 if (err)
414 goto out;
415 type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
416 err = hfs_brec_remove(&src_fd);
417 if (err)
418 goto out;
419
420 /* create new thread entry */
421 hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL);
422 entry_size = hfsplus_fill_cat_thread(sb, &entry, type,
423 dst_dir->i_ino, dst_name);
424 err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
425 if (err != -ENOENT) {
426 if (!err)
427 err = -EEXIST;
428 goto out;
429 }
430 err = hfs_brec_insert(&dst_fd, &entry, entry_size);
431
432 hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY);
433 hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY);
434 out:
435 hfs_bnode_put(dst_fd.bnode);
436 hfs_find_exit(&src_fd);
437 return err;
438 }
kernel source for telekom puls (alcatel/mediatek)