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