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