blob: 8af45fc5b051abb3353501441fa9ea9030d9395a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
12#include "hfsplus_fs.h"
13#include "hfsplus_raw.h"
14
David Elliott2179d372006-01-18 17:43:08 -080015int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1,
16 const hfsplus_btree_key *k2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070017{
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
David Elliott2179d372006-01-18 17:43:08 -080025 return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name);
26}
27
28int 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -070039}
40
41void 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
57static 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
Christoph Hellwig90e61692010-10-14 09:54:39 -040070void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
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;
Christoph Hellwig90e61692010-10-14 09:54:39 -040080
81 perms->userflags = HFSPLUS_I(inode)->userflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 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);
Christoph Hellwig90e61692010-10-14 09:54:39 -040085
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092}
93
94static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode)
95{
Christoph Hellwigdd73a012010-10-01 05:42:59 +020096 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 if (S_ISDIR(inode->i_mode)) {
99 struct hfsplus_cat_folder *folder;
100
101 folder = &entry->folder;
102 memset(folder, 0, sizeof(*folder));
103 folder->type = cpu_to_be16(HFSPLUS_FOLDER);
104 folder->id = cpu_to_be32(inode->i_ino);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200105 HFSPLUS_I(inode)->create_date =
Roman Zippel9a4cad92006-01-18 17:43:09 -0800106 folder->create_date =
107 folder->content_mod_date =
108 folder->attribute_mod_date =
109 folder->access_date = hfsp_now2mt();
Christoph Hellwig90e61692010-10-14 09:54:39 -0400110 hfsplus_cat_set_perms(inode, &folder->permissions);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200111 if (inode == sbi->hidden_dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 /* invisible and namelocked */
113 folder->user_info.frFlags = cpu_to_be16(0x5000);
114 return sizeof(*folder);
115 } else {
116 struct hfsplus_cat_file *file;
117
118 file = &entry->file;
119 memset(file, 0, sizeof(*file));
120 file->type = cpu_to_be16(HFSPLUS_FILE);
121 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS);
122 file->id = cpu_to_be32(cnid);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200123 HFSPLUS_I(inode)->create_date =
Roman Zippel9a4cad92006-01-18 17:43:09 -0800124 file->create_date =
125 file->content_mod_date =
126 file->attribute_mod_date =
127 file->access_date = hfsp_now2mt();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 if (cnid == inode->i_ino) {
Christoph Hellwig90e61692010-10-14 09:54:39 -0400129 hfsplus_cat_set_perms(inode, &file->permissions);
Roman Zippel6b1928322006-01-18 17:43:12 -0800130 if (S_ISLNK(inode->i_mode)) {
131 file->user_info.fdType = cpu_to_be32(HFSP_SYMLINK_TYPE);
132 file->user_info.fdCreator = cpu_to_be32(HFSP_SYMLINK_CREATOR);
133 } else {
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200134 file->user_info.fdType = cpu_to_be32(sbi->type);
135 file->user_info.fdCreator = cpu_to_be32(sbi->creator);
Roman Zippel6b1928322006-01-18 17:43:12 -0800136 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
138 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
139 } else {
140 file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE);
141 file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR);
142 file->user_info.fdFlags = cpu_to_be16(0x100);
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200143 file->create_date = HFSPLUS_I(sbi->hidden_dir)->create_date;
Christoph Hellwigf6089ff2010-10-14 09:54:28 -0400144 file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode)->linkid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 }
146 return sizeof(*file);
147 }
148}
149
150static int hfsplus_fill_cat_thread(struct super_block *sb,
151 hfsplus_cat_entry *entry, int type,
152 u32 parentid, struct qstr *str)
153{
154 entry->type = cpu_to_be16(type);
155 entry->thread.reserved = 0;
156 entry->thread.parentID = cpu_to_be32(parentid);
157 hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len);
158 return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
159}
160
161/* Try to get a catalog entry for given catalog id */
162int hfsplus_find_cat(struct super_block *sb, u32 cnid,
163 struct hfs_find_data *fd)
164{
165 hfsplus_cat_entry tmp;
166 int err;
167 u16 type;
168
169 hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL);
170 err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry));
171 if (err)
172 return err;
173
174 type = be16_to_cpu(tmp.type);
175 if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) {
Roman Zippel634725a2006-01-18 17:43:05 -0800176 printk(KERN_ERR "hfs: found bad thread record in catalog\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 return -EIO;
178 }
179
Eric Sesterhennefc7ffc2008-10-15 22:04:08 -0700180 if (be16_to_cpu(tmp.thread.nodeName.length) > 255) {
181 printk(KERN_ERR "hfs: catalog name length corrupted\n");
182 return -EIO;
183 }
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID),
186 &tmp.thread.nodeName);
187 return hfs_brec_find(fd);
188}
189
190int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode)
191{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200192 struct super_block *sb = dir->i_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 struct hfs_find_data fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 hfsplus_cat_entry entry;
195 int entry_size;
196 int err;
197
198 dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200199 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
202 entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ?
203 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
204 dir->i_ino, str);
205 err = hfs_brec_find(&fd);
206 if (err != -ENOENT) {
207 if (!err)
208 err = -EEXIST;
209 goto err2;
210 }
211 err = hfs_brec_insert(&fd, &entry, entry_size);
212 if (err)
213 goto err2;
214
215 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
216 entry_size = hfsplus_cat_build_record(&entry, cnid, inode);
217 err = hfs_brec_find(&fd);
218 if (err != -ENOENT) {
219 /* panic? */
220 if (!err)
221 err = -EEXIST;
222 goto err1;
223 }
224 err = hfs_brec_insert(&fd, &entry, entry_size);
225 if (err)
226 goto err1;
227
228 dir->i_size++;
229 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
230 mark_inode_dirty(dir);
231 hfs_find_exit(&fd);
232 return 0;
233
234err1:
235 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
236 if (!hfs_brec_find(&fd))
237 hfs_brec_remove(&fd);
238err2:
239 hfs_find_exit(&fd);
240 return err;
241}
242
243int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
244{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200245 struct super_block *sb = dir->i_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 struct hfs_find_data fd;
247 struct hfsplus_fork_raw fork;
248 struct list_head *pos;
249 int err, off;
250 u16 type;
251
252 dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200253 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
255 if (!str) {
256 int len;
257
258 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
259 err = hfs_brec_find(&fd);
260 if (err)
261 goto out;
262
263 off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName);
264 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino);
265 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2);
266 len = be16_to_cpu(fd.search_key->cat.name.length) * 2;
267 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len);
268 fd.search_key->key_len = cpu_to_be16(6 + len);
269 } else
270 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
271
272 err = hfs_brec_find(&fd);
273 if (err)
274 goto out;
275
276 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
277 if (type == HFSPLUS_FILE) {
278#if 0
279 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork);
280 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
281 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA);
282#endif
283
284 off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork);
285 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
286 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC);
287 }
288
Christoph Hellwig6af502d2010-10-01 05:43:31 +0200289 list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 struct hfsplus_readdir_data *rd =
291 list_entry(pos, struct hfsplus_readdir_data, list);
292 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0)
293 rd->file->f_pos--;
294 }
295
296 err = hfs_brec_remove(&fd);
297 if (err)
298 goto out;
299
300 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
301 err = hfs_brec_find(&fd);
302 if (err)
303 goto out;
304
305 err = hfs_brec_remove(&fd);
306 if (err)
307 goto out;
308
309 dir->i_size--;
310 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
311 mark_inode_dirty(dir);
312out:
313 hfs_find_exit(&fd);
314
315 return err;
316}
317
318int hfsplus_rename_cat(u32 cnid,
319 struct inode *src_dir, struct qstr *src_name,
320 struct inode *dst_dir, struct qstr *dst_name)
321{
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200322 struct super_block *sb = src_dir->i_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 struct hfs_find_data src_fd, dst_fd;
324 hfsplus_cat_entry entry;
325 int entry_size, type;
326 int err = 0;
327
328 dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name,
329 dst_dir->i_ino, dst_name->name);
Christoph Hellwigdd73a012010-10-01 05:42:59 +0200330 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 dst_fd = src_fd;
332
333 /* find the old dir entry and read the data */
334 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
335 err = hfs_brec_find(&src_fd);
336 if (err)
337 goto out;
338
339 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
340 src_fd.entrylength);
341
342 /* create new dir entry with the data from the old entry */
343 hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name);
344 err = hfs_brec_find(&dst_fd);
345 if (err != -ENOENT) {
346 if (!err)
347 err = -EEXIST;
348 goto out;
349 }
350
351 err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength);
352 if (err)
353 goto out;
354 dst_dir->i_size++;
355 dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC;
356 mark_inode_dirty(dst_dir);
357
358 /* finally remove the old entry */
359 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
360 err = hfs_brec_find(&src_fd);
361 if (err)
362 goto out;
363 err = hfs_brec_remove(&src_fd);
364 if (err)
365 goto out;
366 src_dir->i_size--;
367 src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC;
368 mark_inode_dirty(src_dir);
369
370 /* remove old thread entry */
371 hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL);
372 err = hfs_brec_find(&src_fd);
373 if (err)
374 goto out;
375 type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
376 err = hfs_brec_remove(&src_fd);
377 if (err)
378 goto out;
379
380 /* create new thread entry */
381 hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL);
382 entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name);
383 err = hfs_brec_find(&dst_fd);
384 if (err != -ENOENT) {
385 if (!err)
386 err = -EEXIST;
387 goto out;
388 }
389 err = hfs_brec_insert(&dst_fd, &entry, entry_size);
390out:
391 hfs_bnode_put(dst_fd.bnode);
392 hfs_find_exit(&src_fd);
393 return err;
394}