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Commit | Line | Data |
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1da177e4 LT |
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 | #include <linux/sched.h> | |
12 | ||
13 | #include "hfsplus_fs.h" | |
14 | #include "hfsplus_raw.h" | |
15 | ||
16 | int hfsplus_cat_cmp_key(hfsplus_btree_key *k1, 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_unistrcmp(&k1->cat.name, &k2->cat.name); | |
26 | } | |
27 | ||
28 | void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key, | |
29 | u32 parent, struct qstr *str) | |
30 | { | |
31 | int len; | |
32 | ||
33 | key->cat.parent = cpu_to_be32(parent); | |
34 | if (str) { | |
35 | hfsplus_asc2uni(sb, &key->cat.name, str->name, str->len); | |
36 | len = be16_to_cpu(key->cat.name.length); | |
37 | } else { | |
38 | key->cat.name.length = 0; | |
39 | len = 0; | |
40 | } | |
41 | key->key_len = cpu_to_be16(6 + 2 * len); | |
42 | } | |
43 | ||
44 | static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent, | |
45 | struct hfsplus_unistr *name) | |
46 | { | |
47 | int ustrlen; | |
48 | ||
49 | ustrlen = be16_to_cpu(name->length); | |
50 | key->cat.parent = cpu_to_be32(parent); | |
51 | key->cat.name.length = cpu_to_be16(ustrlen); | |
52 | ustrlen *= 2; | |
53 | memcpy(key->cat.name.unicode, name->unicode, ustrlen); | |
54 | key->key_len = cpu_to_be16(6 + ustrlen); | |
55 | } | |
56 | ||
57 | static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms) | |
58 | { | |
59 | if (inode->i_flags & S_IMMUTABLE) | |
60 | perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; | |
61 | else | |
62 | perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; | |
63 | if (inode->i_flags & S_APPEND) | |
64 | perms->rootflags |= HFSPLUS_FLG_APPEND; | |
65 | else | |
66 | perms->rootflags &= ~HFSPLUS_FLG_APPEND; | |
67 | HFSPLUS_I(inode).rootflags = perms->rootflags; | |
68 | HFSPLUS_I(inode).userflags = perms->userflags; | |
69 | perms->mode = cpu_to_be16(inode->i_mode); | |
70 | perms->owner = cpu_to_be32(inode->i_uid); | |
71 | perms->group = cpu_to_be32(inode->i_gid); | |
72 | } | |
73 | ||
74 | static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode) | |
75 | { | |
76 | if (S_ISDIR(inode->i_mode)) { | |
77 | struct hfsplus_cat_folder *folder; | |
78 | ||
79 | folder = &entry->folder; | |
80 | memset(folder, 0, sizeof(*folder)); | |
81 | folder->type = cpu_to_be16(HFSPLUS_FOLDER); | |
82 | folder->id = cpu_to_be32(inode->i_ino); | |
83 | folder->create_date = folder->content_mod_date = | |
84 | folder->attribute_mod_date = folder->access_date = hfsp_now2mt(); | |
85 | hfsplus_set_perms(inode, &folder->permissions); | |
86 | if (inode == HFSPLUS_SB(inode->i_sb).hidden_dir) | |
87 | /* invisible and namelocked */ | |
88 | folder->user_info.frFlags = cpu_to_be16(0x5000); | |
89 | return sizeof(*folder); | |
90 | } else { | |
91 | struct hfsplus_cat_file *file; | |
92 | ||
93 | file = &entry->file; | |
94 | memset(file, 0, sizeof(*file)); | |
95 | file->type = cpu_to_be16(HFSPLUS_FILE); | |
96 | file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); | |
97 | file->id = cpu_to_be32(cnid); | |
98 | file->create_date = file->content_mod_date = | |
99 | file->attribute_mod_date = file->access_date = hfsp_now2mt(); | |
100 | if (cnid == inode->i_ino) { | |
101 | hfsplus_set_perms(inode, &file->permissions); | |
102 | file->user_info.fdType = cpu_to_be32(HFSPLUS_SB(inode->i_sb).type); | |
103 | file->user_info.fdCreator = cpu_to_be32(HFSPLUS_SB(inode->i_sb).creator); | |
104 | if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) | |
105 | file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); | |
106 | } else { | |
107 | file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE); | |
108 | file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR); | |
109 | file->user_info.fdFlags = cpu_to_be16(0x100); | |
110 | file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode).dev); | |
111 | } | |
112 | return sizeof(*file); | |
113 | } | |
114 | } | |
115 | ||
116 | static int hfsplus_fill_cat_thread(struct super_block *sb, | |
117 | hfsplus_cat_entry *entry, int type, | |
118 | u32 parentid, struct qstr *str) | |
119 | { | |
120 | entry->type = cpu_to_be16(type); | |
121 | entry->thread.reserved = 0; | |
122 | entry->thread.parentID = cpu_to_be32(parentid); | |
123 | hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len); | |
124 | return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; | |
125 | } | |
126 | ||
127 | /* Try to get a catalog entry for given catalog id */ | |
128 | int hfsplus_find_cat(struct super_block *sb, u32 cnid, | |
129 | struct hfs_find_data *fd) | |
130 | { | |
131 | hfsplus_cat_entry tmp; | |
132 | int err; | |
133 | u16 type; | |
134 | ||
135 | hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL); | |
136 | err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry)); | |
137 | if (err) | |
138 | return err; | |
139 | ||
140 | type = be16_to_cpu(tmp.type); | |
141 | if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { | |
142 | printk("HFS+-fs: Found bad thread record in catalog\n"); | |
143 | return -EIO; | |
144 | } | |
145 | ||
146 | hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), | |
147 | &tmp.thread.nodeName); | |
148 | return hfs_brec_find(fd); | |
149 | } | |
150 | ||
151 | int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode) | |
152 | { | |
153 | struct hfs_find_data fd; | |
154 | struct super_block *sb; | |
155 | hfsplus_cat_entry entry; | |
156 | int entry_size; | |
157 | int err; | |
158 | ||
159 | dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); | |
160 | sb = dir->i_sb; | |
161 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
162 | ||
163 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
164 | entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? | |
165 | HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, | |
166 | dir->i_ino, str); | |
167 | err = hfs_brec_find(&fd); | |
168 | if (err != -ENOENT) { | |
169 | if (!err) | |
170 | err = -EEXIST; | |
171 | goto err2; | |
172 | } | |
173 | err = hfs_brec_insert(&fd, &entry, entry_size); | |
174 | if (err) | |
175 | goto err2; | |
176 | ||
177 | hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); | |
178 | entry_size = hfsplus_cat_build_record(&entry, cnid, inode); | |
179 | err = hfs_brec_find(&fd); | |
180 | if (err != -ENOENT) { | |
181 | /* panic? */ | |
182 | if (!err) | |
183 | err = -EEXIST; | |
184 | goto err1; | |
185 | } | |
186 | err = hfs_brec_insert(&fd, &entry, entry_size); | |
187 | if (err) | |
188 | goto err1; | |
189 | ||
190 | dir->i_size++; | |
191 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
192 | mark_inode_dirty(dir); | |
193 | hfs_find_exit(&fd); | |
194 | return 0; | |
195 | ||
196 | err1: | |
197 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
198 | if (!hfs_brec_find(&fd)) | |
199 | hfs_brec_remove(&fd); | |
200 | err2: | |
201 | hfs_find_exit(&fd); | |
202 | return err; | |
203 | } | |
204 | ||
205 | int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) | |
206 | { | |
207 | struct super_block *sb; | |
208 | struct hfs_find_data fd; | |
209 | struct hfsplus_fork_raw fork; | |
210 | struct list_head *pos; | |
211 | int err, off; | |
212 | u16 type; | |
213 | ||
214 | dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); | |
215 | sb = dir->i_sb; | |
216 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
217 | ||
218 | if (!str) { | |
219 | int len; | |
220 | ||
221 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
222 | err = hfs_brec_find(&fd); | |
223 | if (err) | |
224 | goto out; | |
225 | ||
226 | off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); | |
227 | fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); | |
228 | hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); | |
229 | len = be16_to_cpu(fd.search_key->cat.name.length) * 2; | |
230 | hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); | |
231 | fd.search_key->key_len = cpu_to_be16(6 + len); | |
232 | } else | |
233 | hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); | |
234 | ||
235 | err = hfs_brec_find(&fd); | |
236 | if (err) | |
237 | goto out; | |
238 | ||
239 | type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); | |
240 | if (type == HFSPLUS_FILE) { | |
241 | #if 0 | |
242 | off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); | |
243 | hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); | |
244 | hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); | |
245 | #endif | |
246 | ||
247 | off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); | |
248 | hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); | |
249 | hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); | |
250 | } | |
251 | ||
252 | list_for_each(pos, &HFSPLUS_I(dir).open_dir_list) { | |
253 | struct hfsplus_readdir_data *rd = | |
254 | list_entry(pos, struct hfsplus_readdir_data, list); | |
255 | if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) | |
256 | rd->file->f_pos--; | |
257 | } | |
258 | ||
259 | err = hfs_brec_remove(&fd); | |
260 | if (err) | |
261 | goto out; | |
262 | ||
263 | hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); | |
264 | err = hfs_brec_find(&fd); | |
265 | if (err) | |
266 | goto out; | |
267 | ||
268 | err = hfs_brec_remove(&fd); | |
269 | if (err) | |
270 | goto out; | |
271 | ||
272 | dir->i_size--; | |
273 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; | |
274 | mark_inode_dirty(dir); | |
275 | out: | |
276 | hfs_find_exit(&fd); | |
277 | ||
278 | return err; | |
279 | } | |
280 | ||
281 | int hfsplus_rename_cat(u32 cnid, | |
282 | struct inode *src_dir, struct qstr *src_name, | |
283 | struct inode *dst_dir, struct qstr *dst_name) | |
284 | { | |
285 | struct super_block *sb; | |
286 | struct hfs_find_data src_fd, dst_fd; | |
287 | hfsplus_cat_entry entry; | |
288 | int entry_size, type; | |
289 | int err = 0; | |
290 | ||
291 | dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, | |
292 | dst_dir->i_ino, dst_name->name); | |
293 | sb = src_dir->i_sb; | |
294 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &src_fd); | |
295 | dst_fd = src_fd; | |
296 | ||
297 | /* find the old dir entry and read the data */ | |
298 | hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); | |
299 | err = hfs_brec_find(&src_fd); | |
300 | if (err) | |
301 | goto out; | |
302 | ||
303 | hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, | |
304 | src_fd.entrylength); | |
305 | ||
306 | /* create new dir entry with the data from the old entry */ | |
307 | hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); | |
308 | err = hfs_brec_find(&dst_fd); | |
309 | if (err != -ENOENT) { | |
310 | if (!err) | |
311 | err = -EEXIST; | |
312 | goto out; | |
313 | } | |
314 | ||
315 | err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); | |
316 | if (err) | |
317 | goto out; | |
318 | dst_dir->i_size++; | |
319 | dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; | |
320 | mark_inode_dirty(dst_dir); | |
321 | ||
322 | /* finally remove the old entry */ | |
323 | hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); | |
324 | err = hfs_brec_find(&src_fd); | |
325 | if (err) | |
326 | goto out; | |
327 | err = hfs_brec_remove(&src_fd); | |
328 | if (err) | |
329 | goto out; | |
330 | src_dir->i_size--; | |
331 | src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; | |
332 | mark_inode_dirty(src_dir); | |
333 | ||
334 | /* remove old thread entry */ | |
335 | hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); | |
336 | err = hfs_brec_find(&src_fd); | |
337 | if (err) | |
338 | goto out; | |
339 | type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); | |
340 | err = hfs_brec_remove(&src_fd); | |
341 | if (err) | |
342 | goto out; | |
343 | ||
344 | /* create new thread entry */ | |
345 | hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); | |
346 | entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name); | |
347 | err = hfs_brec_find(&dst_fd); | |
348 | if (err != -ENOENT) { | |
349 | if (!err) | |
350 | err = -EEXIST; | |
351 | goto out; | |
352 | } | |
353 | err = hfs_brec_insert(&dst_fd, &entry, entry_size); | |
354 | out: | |
355 | hfs_bnode_put(dst_fd.bnode); | |
356 | hfs_find_exit(&src_fd); | |
357 | return err; | |
358 | } |