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