[PATCH] hfs: set correct ctime
[linux-2.6] / 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 #include <linux/sched.h>
12
13 #include "hfsplus_fs.h"
14 #include "hfsplus_raw.h"
15
16 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1,
17                              const hfsplus_btree_key *k2)
18 {
19         __be32 k1p, k2p;
20
21         k1p = k1->cat.parent;
22         k2p = k2->cat.parent;
23         if (k1p != k2p)
24                 return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1;
25
26         return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name);
27 }
28
29 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1,
30                             const hfsplus_btree_key *k2)
31 {
32         __be32 k1p, k2p;
33
34         k1p = k1->cat.parent;
35         k2p = k2->cat.parent;
36         if (k1p != k2p)
37                 return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1;
38
39         return hfsplus_strcmp(&k1->cat.name, &k2->cat.name);
40 }
41
42 void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key,
43                            u32 parent, struct qstr *str)
44 {
45         int len;
46
47         key->cat.parent = cpu_to_be32(parent);
48         if (str) {
49                 hfsplus_asc2uni(sb, &key->cat.name, 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 static void hfsplus_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         HFSPLUS_I(inode).rootflags = perms->rootflags;
82         HFSPLUS_I(inode).userflags = perms->userflags;
83         perms->mode = cpu_to_be16(inode->i_mode);
84         perms->owner = cpu_to_be32(inode->i_uid);
85         perms->group = cpu_to_be32(inode->i_gid);
86 }
87
88 static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode)
89 {
90         if (S_ISDIR(inode->i_mode)) {
91                 struct hfsplus_cat_folder *folder;
92
93                 folder = &entry->folder;
94                 memset(folder, 0, sizeof(*folder));
95                 folder->type = cpu_to_be16(HFSPLUS_FOLDER);
96                 folder->id = cpu_to_be32(inode->i_ino);
97                 HFSPLUS_I(inode).create_date =
98                         folder->create_date =
99                         folder->content_mod_date =
100                         folder->attribute_mod_date =
101                         folder->access_date = hfsp_now2mt();
102                 hfsplus_set_perms(inode, &folder->permissions);
103                 if (inode == HFSPLUS_SB(inode->i_sb).hidden_dir)
104                         /* invisible and namelocked */
105                         folder->user_info.frFlags = cpu_to_be16(0x5000);
106                 return sizeof(*folder);
107         } else {
108                 struct hfsplus_cat_file *file;
109
110                 file = &entry->file;
111                 memset(file, 0, sizeof(*file));
112                 file->type = cpu_to_be16(HFSPLUS_FILE);
113                 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS);
114                 file->id = cpu_to_be32(cnid);
115                 HFSPLUS_I(inode).create_date =
116                         file->create_date =
117                         file->content_mod_date =
118                         file->attribute_mod_date =
119                         file->access_date = hfsp_now2mt();
120                 if (cnid == inode->i_ino) {
121                         hfsplus_set_perms(inode, &file->permissions);
122                         file->user_info.fdType = cpu_to_be32(HFSPLUS_SB(inode->i_sb).type);
123                         file->user_info.fdCreator = cpu_to_be32(HFSPLUS_SB(inode->i_sb).creator);
124                         if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
125                                 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
126                 } else {
127                         file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE);
128                         file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR);
129                         file->user_info.fdFlags = cpu_to_be16(0x100);
130                         file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode).dev);
131                 }
132                 return sizeof(*file);
133         }
134 }
135
136 static int hfsplus_fill_cat_thread(struct super_block *sb,
137                                    hfsplus_cat_entry *entry, int type,
138                                    u32 parentid, struct qstr *str)
139 {
140         entry->type = cpu_to_be16(type);
141         entry->thread.reserved = 0;
142         entry->thread.parentID = cpu_to_be32(parentid);
143         hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len);
144         return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
145 }
146
147 /* Try to get a catalog entry for given catalog id */
148 int hfsplus_find_cat(struct super_block *sb, u32 cnid,
149                      struct hfs_find_data *fd)
150 {
151         hfsplus_cat_entry tmp;
152         int err;
153         u16 type;
154
155         hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL);
156         err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry));
157         if (err)
158                 return err;
159
160         type = be16_to_cpu(tmp.type);
161         if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) {
162                 printk(KERN_ERR "hfs: found bad thread record in catalog\n");
163                 return -EIO;
164         }
165
166         hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID),
167                                  &tmp.thread.nodeName);
168         return hfs_brec_find(fd);
169 }
170
171 int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode)
172 {
173         struct hfs_find_data fd;
174         struct super_block *sb;
175         hfsplus_cat_entry entry;
176         int entry_size;
177         int err;
178
179         dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink);
180         sb = dir->i_sb;
181         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
182
183         hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
184         entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ?
185                         HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
186                         dir->i_ino, str);
187         err = hfs_brec_find(&fd);
188         if (err != -ENOENT) {
189                 if (!err)
190                         err = -EEXIST;
191                 goto err2;
192         }
193         err = hfs_brec_insert(&fd, &entry, entry_size);
194         if (err)
195                 goto err2;
196
197         hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
198         entry_size = hfsplus_cat_build_record(&entry, cnid, inode);
199         err = hfs_brec_find(&fd);
200         if (err != -ENOENT) {
201                 /* panic? */
202                 if (!err)
203                         err = -EEXIST;
204                 goto err1;
205         }
206         err = hfs_brec_insert(&fd, &entry, entry_size);
207         if (err)
208                 goto err1;
209
210         dir->i_size++;
211         dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
212         mark_inode_dirty(dir);
213         hfs_find_exit(&fd);
214         return 0;
215
216 err1:
217         hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
218         if (!hfs_brec_find(&fd))
219                 hfs_brec_remove(&fd);
220 err2:
221         hfs_find_exit(&fd);
222         return err;
223 }
224
225 int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
226 {
227         struct super_block *sb;
228         struct hfs_find_data fd;
229         struct hfsplus_fork_raw fork;
230         struct list_head *pos;
231         int err, off;
232         u16 type;
233
234         dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid);
235         sb = dir->i_sb;
236         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
237
238         if (!str) {
239                 int len;
240
241                 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
242                 err = hfs_brec_find(&fd);
243                 if (err)
244                         goto out;
245
246                 off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName);
247                 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino);
248                 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2);
249                 len = be16_to_cpu(fd.search_key->cat.name.length) * 2;
250                 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len);
251                 fd.search_key->key_len = cpu_to_be16(6 + len);
252         } else
253                 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
254
255         err = hfs_brec_find(&fd);
256         if (err)
257                 goto out;
258
259         type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
260         if (type == HFSPLUS_FILE) {
261 #if 0
262                 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork);
263                 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
264                 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA);
265 #endif
266
267                 off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork);
268                 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
269                 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC);
270         }
271
272         list_for_each(pos, &HFSPLUS_I(dir).open_dir_list) {
273                 struct hfsplus_readdir_data *rd =
274                         list_entry(pos, struct hfsplus_readdir_data, list);
275                 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0)
276                         rd->file->f_pos--;
277         }
278
279         err = hfs_brec_remove(&fd);
280         if (err)
281                 goto out;
282
283         hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
284         err = hfs_brec_find(&fd);
285         if (err)
286                 goto out;
287
288         err = hfs_brec_remove(&fd);
289         if (err)
290                 goto out;
291
292         dir->i_size--;
293         dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
294         mark_inode_dirty(dir);
295 out:
296         hfs_find_exit(&fd);
297
298         return err;
299 }
300
301 int hfsplus_rename_cat(u32 cnid,
302                        struct inode *src_dir, struct qstr *src_name,
303                        struct inode *dst_dir, struct qstr *dst_name)
304 {
305         struct super_block *sb;
306         struct hfs_find_data src_fd, dst_fd;
307         hfsplus_cat_entry entry;
308         int entry_size, type;
309         int err = 0;
310
311         dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name,
312                 dst_dir->i_ino, dst_name->name);
313         sb = src_dir->i_sb;
314         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &src_fd);
315         dst_fd = src_fd;
316
317         /* find the old dir entry and read the data */
318         hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
319         err = hfs_brec_find(&src_fd);
320         if (err)
321                 goto out;
322
323         hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
324                                 src_fd.entrylength);
325
326         /* create new dir entry with the data from the old entry */
327         hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name);
328         err = hfs_brec_find(&dst_fd);
329         if (err != -ENOENT) {
330                 if (!err)
331                         err = -EEXIST;
332                 goto out;
333         }
334
335         err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength);
336         if (err)
337                 goto out;
338         dst_dir->i_size++;
339         dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC;
340         mark_inode_dirty(dst_dir);
341
342         /* finally remove the old entry */
343         hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
344         err = hfs_brec_find(&src_fd);
345         if (err)
346                 goto out;
347         err = hfs_brec_remove(&src_fd);
348         if (err)
349                 goto out;
350         src_dir->i_size--;
351         src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC;
352         mark_inode_dirty(src_dir);
353
354         /* remove old thread entry */
355         hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL);
356         err = hfs_brec_find(&src_fd);
357         if (err)
358                 goto out;
359         type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
360         err = hfs_brec_remove(&src_fd);
361         if (err)
362                 goto out;
363
364         /* create new thread entry */
365         hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL);
366         entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name);
367         err = hfs_brec_find(&dst_fd);
368         if (err != -ENOENT) {
369                 if (!err)
370                         err = -EEXIST;
371                 goto out;
372         }
373         err = hfs_brec_insert(&dst_fd, &entry, entry_size);
374 out:
375         hfs_bnode_put(dst_fd.bnode);
376         hfs_find_exit(&src_fd);
377         return err;
378 }