~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/hfsplus/catalog.c

Version: ~ [ linux-5.2 ] ~ [ linux-5.1.16 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.57 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.132 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.184 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.184 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.69 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 /* Generates key for catalog file/folders record. */
 42 int hfsplus_cat_build_key(struct super_block *sb,
 43                 hfsplus_btree_key *key, u32 parent, const struct qstr *str)
 44 {
 45         int len, err;
 46 
 47         key->cat.parent = cpu_to_be32(parent);
 48         err = hfsplus_asc2uni(sb, &key->cat.name, HFSPLUS_MAX_STRLEN,
 49                         str->name, str->len);
 50         if (unlikely(err < 0))
 51                 return err;
 52 
 53         len = be16_to_cpu(key->cat.name.length);
 54         key->key_len = cpu_to_be16(6 + 2 * len);
 55         return 0;
 56 }
 57 
 58 /* Generates key for catalog thread record. */
 59 void hfsplus_cat_build_key_with_cnid(struct super_block *sb,
 60                         hfsplus_btree_key *key, u32 parent)
 61 {
 62         key->cat.parent = cpu_to_be32(parent);
 63         key->cat.name.length = 0;
 64         key->key_len = cpu_to_be16(6);
 65 }
 66 
 67 static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent,
 68                                       struct hfsplus_unistr *name)
 69 {
 70         int ustrlen;
 71 
 72         ustrlen = be16_to_cpu(name->length);
 73         key->cat.parent = cpu_to_be32(parent);
 74         key->cat.name.length = cpu_to_be16(ustrlen);
 75         ustrlen *= 2;
 76         memcpy(key->cat.name.unicode, name->unicode, ustrlen);
 77         key->key_len = cpu_to_be16(6 + ustrlen);
 78 }
 79 
 80 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms)
 81 {
 82         if (inode->i_flags & S_IMMUTABLE)
 83                 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
 84         else
 85                 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
 86         if (inode->i_flags & S_APPEND)
 87                 perms->rootflags |= HFSPLUS_FLG_APPEND;
 88         else
 89                 perms->rootflags &= ~HFSPLUS_FLG_APPEND;
 90 
 91         perms->userflags = HFSPLUS_I(inode)->userflags;
 92         perms->mode = cpu_to_be16(inode->i_mode);
 93         perms->owner = cpu_to_be32(i_uid_read(inode));
 94         perms->group = cpu_to_be32(i_gid_read(inode));
 95 
 96         if (S_ISREG(inode->i_mode))
 97                 perms->dev = cpu_to_be32(inode->i_nlink);
 98         else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode))
 99                 perms->dev = cpu_to_be32(inode->i_rdev);
100         else
101                 perms->dev = 0;
102 }
103 
104 static int hfsplus_cat_build_record(hfsplus_cat_entry *entry,
105                 u32 cnid, struct inode *inode)
106 {
107         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
108 
109         if (S_ISDIR(inode->i_mode)) {
110                 struct hfsplus_cat_folder *folder;
111 
112                 folder = &entry->folder;
113                 memset(folder, 0, sizeof(*folder));
114                 folder->type = cpu_to_be16(HFSPLUS_FOLDER);
115                 if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags))
116                         folder->flags |= cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT);
117                 folder->id = cpu_to_be32(inode->i_ino);
118                 HFSPLUS_I(inode)->create_date =
119                         folder->create_date =
120                         folder->content_mod_date =
121                         folder->attribute_mod_date =
122                         folder->access_date = hfsp_now2mt();
123                 hfsplus_cat_set_perms(inode, &folder->permissions);
124                 if (inode == sbi->hidden_dir)
125                         /* invisible and namelocked */
126                         folder->user_info.frFlags = cpu_to_be16(0x5000);
127                 return sizeof(*folder);
128         } else {
129                 struct hfsplus_cat_file *file;
130 
131                 file = &entry->file;
132                 memset(file, 0, sizeof(*file));
133                 file->type = cpu_to_be16(HFSPLUS_FILE);
134                 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS);
135                 file->id = cpu_to_be32(cnid);
136                 HFSPLUS_I(inode)->create_date =
137                         file->create_date =
138                         file->content_mod_date =
139                         file->attribute_mod_date =
140                         file->access_date = hfsp_now2mt();
141                 if (cnid == inode->i_ino) {
142                         hfsplus_cat_set_perms(inode, &file->permissions);
143                         if (S_ISLNK(inode->i_mode)) {
144                                 file->user_info.fdType =
145                                         cpu_to_be32(HFSP_SYMLINK_TYPE);
146                                 file->user_info.fdCreator =
147                                         cpu_to_be32(HFSP_SYMLINK_CREATOR);
148                         } else {
149                                 file->user_info.fdType =
150                                         cpu_to_be32(sbi->type);
151                                 file->user_info.fdCreator =
152                                         cpu_to_be32(sbi->creator);
153                         }
154                         if (HFSPLUS_FLG_IMMUTABLE &
155                                         (file->permissions.rootflags |
156                                         file->permissions.userflags))
157                                 file->flags |=
158                                         cpu_to_be16(HFSPLUS_FILE_LOCKED);
159                 } else {
160                         file->user_info.fdType =
161                                 cpu_to_be32(HFSP_HARDLINK_TYPE);
162                         file->user_info.fdCreator =
163                                 cpu_to_be32(HFSP_HFSPLUS_CREATOR);
164                         file->user_info.fdFlags =
165                                 cpu_to_be16(0x100);
166                         file->create_date =
167                                 HFSPLUS_I(sbi->hidden_dir)->create_date;
168                         file->permissions.dev =
169                                 cpu_to_be32(HFSPLUS_I(inode)->linkid);
170                 }
171                 return sizeof(*file);
172         }
173 }
174 
175 static int hfsplus_fill_cat_thread(struct super_block *sb,
176                                    hfsplus_cat_entry *entry, int type,
177                                    u32 parentid, const struct qstr *str)
178 {
179         int err;
180 
181         entry->type = cpu_to_be16(type);
182         entry->thread.reserved = 0;
183         entry->thread.parentID = cpu_to_be32(parentid);
184         err = hfsplus_asc2uni(sb, &entry->thread.nodeName, HFSPLUS_MAX_STRLEN,
185                                 str->name, str->len);
186         if (unlikely(err < 0))
187                 return err;
188 
189         return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
190 }
191 
192 /* Try to get a catalog entry for given catalog id */
193 int hfsplus_find_cat(struct super_block *sb, u32 cnid,
194                      struct hfs_find_data *fd)
195 {
196         hfsplus_cat_entry tmp;
197         int err;
198         u16 type;
199 
200         hfsplus_cat_build_key_with_cnid(sb, fd->search_key, cnid);
201         err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry));
202         if (err)
203                 return err;
204 
205         type = be16_to_cpu(tmp.type);
206         if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) {
207                 pr_err("found bad thread record in catalog\n");
208                 return -EIO;
209         }
210 
211         if (be16_to_cpu(tmp.thread.nodeName.length) > 255) {
212                 pr_err("catalog name length corrupted\n");
213                 return -EIO;
214         }
215 
216         hfsplus_cat_build_key_uni(fd->search_key,
217                 be32_to_cpu(tmp.thread.parentID),
218                 &tmp.thread.nodeName);
219         return hfs_brec_find(fd, hfs_find_rec_by_key);
220 }
221 
222 static void hfsplus_subfolders_inc(struct inode *dir)
223 {
224         struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
225 
226         if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) {
227                 /*
228                  * Increment subfolder count. Note, the value is only meaningful
229                  * for folders with HFSPLUS_HAS_FOLDER_COUNT flag set.
230                  */
231                 HFSPLUS_I(dir)->subfolders++;
232         }
233 }
234 
235 static void hfsplus_subfolders_dec(struct inode *dir)
236 {
237         struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
238 
239         if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) {
240                 /*
241                  * Decrement subfolder count. Note, the value is only meaningful
242                  * for folders with HFSPLUS_HAS_FOLDER_COUNT flag set.
243                  *
244                  * Check for zero. Some subfolders may have been created
245                  * by an implementation ignorant of this counter.
246                  */
247                 if (HFSPLUS_I(dir)->subfolders)
248                         HFSPLUS_I(dir)->subfolders--;
249         }
250 }
251 
252 int hfsplus_create_cat(u32 cnid, struct inode *dir,
253                 const struct qstr *str, struct inode *inode)
254 {
255         struct super_block *sb = dir->i_sb;
256         struct hfs_find_data fd;
257         hfsplus_cat_entry entry;
258         int entry_size;
259         int err;
260 
261         hfs_dbg(CAT_MOD, "create_cat: %s,%u(%d)\n",
262                 str->name, cnid, inode->i_nlink);
263         err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
264         if (err)
265                 return err;
266 
267         hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
268         entry_size = hfsplus_fill_cat_thread(sb, &entry,
269                 S_ISDIR(inode->i_mode) ?
270                         HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
271                 dir->i_ino, str);
272         if (unlikely(entry_size < 0)) {
273                 err = entry_size;
274                 goto err2;
275         }
276 
277         err = hfs_brec_find(&fd, hfs_find_rec_by_key);
278         if (err != -ENOENT) {
279                 if (!err)
280                         err = -EEXIST;
281                 goto err2;
282         }
283         err = hfs_brec_insert(&fd, &entry, entry_size);
284         if (err)
285                 goto err2;
286 
287         err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
288         if (unlikely(err))
289                 goto err1;
290 
291         entry_size = hfsplus_cat_build_record(&entry, cnid, inode);
292         err = hfs_brec_find(&fd, hfs_find_rec_by_key);
293         if (err != -ENOENT) {
294                 /* panic? */
295                 if (!err)
296                         err = -EEXIST;
297                 goto err1;
298         }
299         err = hfs_brec_insert(&fd, &entry, entry_size);
300         if (err)
301                 goto err1;
302 
303         dir->i_size++;
304         if (S_ISDIR(inode->i_mode))
305                 hfsplus_subfolders_inc(dir);
306         dir->i_mtime = dir->i_ctime = current_time(dir);
307         hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
308 
309         hfs_find_exit(&fd);
310         return 0;
311 
312 err1:
313         hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
314         if (!hfs_brec_find(&fd, hfs_find_rec_by_key))
315                 hfs_brec_remove(&fd);
316 err2:
317         hfs_find_exit(&fd);
318         return err;
319 }
320 
321 int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str)
322 {
323         struct super_block *sb = dir->i_sb;
324         struct hfs_find_data fd;
325         struct hfsplus_fork_raw fork;
326         struct list_head *pos;
327         int err, off;
328         u16 type;
329 
330         hfs_dbg(CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid);
331         err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
332         if (err)
333                 return err;
334 
335         if (!str) {
336                 int len;
337 
338                 hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
339                 err = hfs_brec_find(&fd, hfs_find_rec_by_key);
340                 if (err)
341                         goto out;
342 
343                 off = fd.entryoffset +
344                         offsetof(struct hfsplus_cat_thread, nodeName);
345                 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino);
346                 hfs_bnode_read(fd.bnode,
347                         &fd.search_key->cat.name.length, off, 2);
348                 len = be16_to_cpu(fd.search_key->cat.name.length) * 2;
349                 hfs_bnode_read(fd.bnode,
350                         &fd.search_key->cat.name.unicode,
351                         off + 2, len);
352                 fd.search_key->key_len = cpu_to_be16(6 + len);
353         } else {
354                 err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
355                 if (unlikely(err))
356                         goto out;
357         }
358 
359         err = hfs_brec_find(&fd, hfs_find_rec_by_key);
360         if (err)
361                 goto out;
362 
363         type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
364         if (type == HFSPLUS_FILE) {
365 #if 0
366                 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork);
367                 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
368                 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA);
369 #endif
370 
371                 off = fd.entryoffset +
372                         offsetof(struct hfsplus_cat_file, rsrc_fork);
373                 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
374                 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC);
375         }
376 
377         /* we only need to take spinlock for exclusion with ->release() */
378         spin_lock(&HFSPLUS_I(dir)->open_dir_lock);
379         list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) {
380                 struct hfsplus_readdir_data *rd =
381                         list_entry(pos, struct hfsplus_readdir_data, list);
382                 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0)
383                         rd->file->f_pos--;
384         }
385         spin_unlock(&HFSPLUS_I(dir)->open_dir_lock);
386 
387         err = hfs_brec_remove(&fd);
388         if (err)
389                 goto out;
390 
391         hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
392         err = hfs_brec_find(&fd, hfs_find_rec_by_key);
393         if (err)
394                 goto out;
395 
396         err = hfs_brec_remove(&fd);
397         if (err)
398                 goto out;
399 
400         dir->i_size--;
401         if (type == HFSPLUS_FOLDER)
402                 hfsplus_subfolders_dec(dir);
403         dir->i_mtime = dir->i_ctime = current_time(dir);
404         hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
405 
406         if (type == HFSPLUS_FILE || type == HFSPLUS_FOLDER) {
407                 if (HFSPLUS_SB(sb)->attr_tree)
408                         hfsplus_delete_all_attrs(dir, cnid);
409         }
410 
411 out:
412         hfs_find_exit(&fd);
413 
414         return err;
415 }
416 
417 int hfsplus_rename_cat(u32 cnid,
418                        struct inode *src_dir, const struct qstr *src_name,
419                        struct inode *dst_dir, const struct qstr *dst_name)
420 {
421         struct super_block *sb = src_dir->i_sb;
422         struct hfs_find_data src_fd, dst_fd;
423         hfsplus_cat_entry entry;
424         int entry_size, type;
425         int err;
426 
427         hfs_dbg(CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n",
428                 cnid, src_dir->i_ino, src_name->name,
429                 dst_dir->i_ino, dst_name->name);
430         err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd);
431         if (err)
432                 return err;
433         dst_fd = src_fd;
434 
435         /* find the old dir entry and read the data */
436         err = hfsplus_cat_build_key(sb, src_fd.search_key,
437                         src_dir->i_ino, src_name);
438         if (unlikely(err))
439                 goto out;
440 
441         err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
442         if (err)
443                 goto out;
444         if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) {
445                 err = -EIO;
446                 goto out;
447         }
448 
449         hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
450                                 src_fd.entrylength);
451         type = be16_to_cpu(entry.type);
452 
453         /* create new dir entry with the data from the old entry */
454         err = hfsplus_cat_build_key(sb, dst_fd.search_key,
455                         dst_dir->i_ino, dst_name);
456         if (unlikely(err))
457                 goto out;
458 
459         err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
460         if (err != -ENOENT) {
461                 if (!err)
462                         err = -EEXIST;
463                 goto out;
464         }
465 
466         err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength);
467         if (err)
468                 goto out;
469         dst_dir->i_size++;
470         if (type == HFSPLUS_FOLDER)
471                 hfsplus_subfolders_inc(dst_dir);
472         dst_dir->i_mtime = dst_dir->i_ctime = current_time(dst_dir);
473 
474         /* finally remove the old entry */
475         err = hfsplus_cat_build_key(sb, src_fd.search_key,
476                         src_dir->i_ino, src_name);
477         if (unlikely(err))
478                 goto out;
479 
480         err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
481         if (err)
482                 goto out;
483         err = hfs_brec_remove(&src_fd);
484         if (err)
485                 goto out;
486         src_dir->i_size--;
487         if (type == HFSPLUS_FOLDER)
488                 hfsplus_subfolders_dec(src_dir);
489         src_dir->i_mtime = src_dir->i_ctime = current_time(src_dir);
490 
491         /* remove old thread entry */
492         hfsplus_cat_build_key_with_cnid(sb, src_fd.search_key, cnid);
493         err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
494         if (err)
495                 goto out;
496         type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
497         err = hfs_brec_remove(&src_fd);
498         if (err)
499                 goto out;
500 
501         /* create new thread entry */
502         hfsplus_cat_build_key_with_cnid(sb, dst_fd.search_key, cnid);
503         entry_size = hfsplus_fill_cat_thread(sb, &entry, type,
504                 dst_dir->i_ino, dst_name);
505         if (unlikely(entry_size < 0)) {
506                 err = entry_size;
507                 goto out;
508         }
509 
510         err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
511         if (err != -ENOENT) {
512                 if (!err)
513                         err = -EEXIST;
514                 goto out;
515         }
516         err = hfs_brec_insert(&dst_fd, &entry, entry_size);
517 
518         hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY);
519         hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY);
520 out:
521         hfs_bnode_put(dst_fd.bnode);
522         hfs_find_exit(&src_fd);
523         return err;
524 }
525 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp