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, str->name, str->len); 49 len = be16_to_cpu(key->cat.name.length); 50 } else { 51 key->cat.name.length = 0; 52 len = 0; 53 } 54 key->key_len = cpu_to_be16(6 + 2 * len); 55 } 56 57 static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent, 58 struct hfsplus_unistr *name) 59 { 60 int ustrlen; 61 62 ustrlen = be16_to_cpu(name->length); 63 key->cat.parent = cpu_to_be32(parent); 64 key->cat.name.length = cpu_to_be16(ustrlen); 65 ustrlen *= 2; 66 memcpy(key->cat.name.unicode, name->unicode, ustrlen); 67 key->key_len = cpu_to_be16(6 + ustrlen); 68 } 69 70 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms) 71 { 72 if (inode->i_flags & S_IMMUTABLE) 73 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; 74 else 75 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; 76 if (inode->i_flags & S_APPEND) 77 perms->rootflags |= HFSPLUS_FLG_APPEND; 78 else 79 perms->rootflags &= ~HFSPLUS_FLG_APPEND; 80 81 perms->userflags = HFSPLUS_I(inode)->userflags; 82 perms->mode = cpu_to_be16(inode->i_mode); 83 perms->owner = cpu_to_be32(i_uid_read(inode)); 84 perms->group = cpu_to_be32(i_gid_read(inode)); 85 86 if (S_ISREG(inode->i_mode)) 87 perms->dev = cpu_to_be32(inode->i_nlink); 88 else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) 89 perms->dev = cpu_to_be32(inode->i_rdev); 90 else 91 perms->dev = 0; 92 } 93 94 static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, 95 u32 cnid, struct inode *inode) 96 { 97 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 98 99 if (S_ISDIR(inode->i_mode)) { 100 struct hfsplus_cat_folder *folder; 101 102 folder = &entry->folder; 103 memset(folder, 0, sizeof(*folder)); 104 folder->type = cpu_to_be16(HFSPLUS_FOLDER); 105 folder->id = cpu_to_be32(inode->i_ino); 106 HFSPLUS_I(inode)->create_date = 107 folder->create_date = 108 folder->content_mod_date = 109 folder->attribute_mod_date = 110 folder->access_date = hfsp_now2mt(); 111 hfsplus_cat_set_perms(inode, &folder->permissions); 112 if (inode == sbi->hidden_dir) 113 /* invisible and namelocked */ 114 folder->user_info.frFlags = cpu_to_be16(0x5000); 115 return sizeof(*folder); 116 } else { 117 struct hfsplus_cat_file *file; 118 119 file = &entry->file; 120 memset(file, 0, sizeof(*file)); 121 file->type = cpu_to_be16(HFSPLUS_FILE); 122 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); 123 file->id = cpu_to_be32(cnid); 124 HFSPLUS_I(inode)->create_date = 125 file->create_date = 126 file->content_mod_date = 127 file->attribute_mod_date = 128 file->access_date = hfsp_now2mt(); 129 if (cnid == inode->i_ino) { 130 hfsplus_cat_set_perms(inode, &file->permissions); 131 if (S_ISLNK(inode->i_mode)) { 132 file->user_info.fdType = 133 cpu_to_be32(HFSP_SYMLINK_TYPE); 134 file->user_info.fdCreator = 135 cpu_to_be32(HFSP_SYMLINK_CREATOR); 136 } else { 137 file->user_info.fdType = 138 cpu_to_be32(sbi->type); 139 file->user_info.fdCreator = 140 cpu_to_be32(sbi->creator); 141 } 142 if (HFSPLUS_FLG_IMMUTABLE & 143 (file->permissions.rootflags | 144 file->permissions.userflags)) 145 file->flags |= 146 cpu_to_be16(HFSPLUS_FILE_LOCKED); 147 } else { 148 file->user_info.fdType = 149 cpu_to_be32(HFSP_HARDLINK_TYPE); 150 file->user_info.fdCreator = 151 cpu_to_be32(HFSP_HFSPLUS_CREATOR); 152 file->user_info.fdFlags = 153 cpu_to_be16(0x100); 154 file->create_date = 155 HFSPLUS_I(sbi->hidden_dir)->create_date; 156 file->permissions.dev = 157 cpu_to_be32(HFSPLUS_I(inode)->linkid); 158 } 159 return sizeof(*file); 160 } 161 } 162 163 static int hfsplus_fill_cat_thread(struct super_block *sb, 164 hfsplus_cat_entry *entry, int type, 165 u32 parentid, struct qstr *str) 166 { 167 entry->type = cpu_to_be16(type); 168 entry->thread.reserved = 0; 169 entry->thread.parentID = cpu_to_be32(parentid); 170 hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len); 171 return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; 172 } 173 174 /* Try to get a catalog entry for given catalog id */ 175 int hfsplus_find_cat(struct super_block *sb, u32 cnid, 176 struct hfs_find_data *fd) 177 { 178 hfsplus_cat_entry tmp; 179 int err; 180 u16 type; 181 182 hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL); 183 err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry)); 184 if (err) 185 return err; 186 187 type = be16_to_cpu(tmp.type); 188 if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { 189 printk(KERN_ERR "hfs: found bad thread record in catalog\n"); 190 return -EIO; 191 } 192 193 if (be16_to_cpu(tmp.thread.nodeName.length) > 255) { 194 printk(KERN_ERR "hfs: catalog name length corrupted\n"); 195 return -EIO; 196 } 197 198 hfsplus_cat_build_key_uni(fd->search_key, 199 be32_to_cpu(tmp.thread.parentID), 200 &tmp.thread.nodeName); 201 return hfs_brec_find(fd); 202 } 203 204 int hfsplus_create_cat(u32 cnid, struct inode *dir, 205 struct qstr *str, struct inode *inode) 206 { 207 struct super_block *sb = dir->i_sb; 208 struct hfs_find_data fd; 209 hfsplus_cat_entry entry; 210 int entry_size; 211 int err; 212 213 dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", 214 str->name, cnid, inode->i_nlink); 215 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); 216 if (err) 217 return err; 218 219 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 220 entry_size = hfsplus_fill_cat_thread(sb, &entry, 221 S_ISDIR(inode->i_mode) ? 222 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, 223 dir->i_ino, str); 224 err = hfs_brec_find(&fd); 225 if (err != -ENOENT) { 226 if (!err) 227 err = -EEXIST; 228 goto err2; 229 } 230 err = hfs_brec_insert(&fd, &entry, entry_size); 231 if (err) 232 goto err2; 233 234 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 235 entry_size = hfsplus_cat_build_record(&entry, cnid, inode); 236 err = hfs_brec_find(&fd); 237 if (err != -ENOENT) { 238 /* panic? */ 239 if (!err) 240 err = -EEXIST; 241 goto err1; 242 } 243 err = hfs_brec_insert(&fd, &entry, entry_size); 244 if (err) 245 goto err1; 246 247 dir->i_size++; 248 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 249 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); 250 251 hfs_find_exit(&fd); 252 return 0; 253 254 err1: 255 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 256 if (!hfs_brec_find(&fd)) 257 hfs_brec_remove(&fd); 258 err2: 259 hfs_find_exit(&fd); 260 return err; 261 } 262 263 int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) 264 { 265 struct super_block *sb = dir->i_sb; 266 struct hfs_find_data fd; 267 struct hfsplus_fork_raw fork; 268 struct list_head *pos; 269 int err, off; 270 u16 type; 271 272 dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", 273 str ? str->name : NULL, cnid); 274 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); 275 if (err) 276 return err; 277 278 if (!str) { 279 int len; 280 281 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 282 err = hfs_brec_find(&fd); 283 if (err) 284 goto out; 285 286 off = fd.entryoffset + 287 offsetof(struct hfsplus_cat_thread, nodeName); 288 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); 289 hfs_bnode_read(fd.bnode, 290 &fd.search_key->cat.name.length, off, 2); 291 len = be16_to_cpu(fd.search_key->cat.name.length) * 2; 292 hfs_bnode_read(fd.bnode, 293 &fd.search_key->cat.name.unicode, 294 off + 2, len); 295 fd.search_key->key_len = cpu_to_be16(6 + len); 296 } else 297 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 298 299 err = hfs_brec_find(&fd); 300 if (err) 301 goto out; 302 303 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); 304 if (type == HFSPLUS_FILE) { 305 #if 0 306 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); 307 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); 308 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); 309 #endif 310 311 off = fd.entryoffset + 312 offsetof(struct hfsplus_cat_file, rsrc_fork); 313 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); 314 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); 315 } 316 317 list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) { 318 struct hfsplus_readdir_data *rd = 319 list_entry(pos, struct hfsplus_readdir_data, list); 320 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) 321 rd->file->f_pos--; 322 } 323 324 err = hfs_brec_remove(&fd); 325 if (err) 326 goto out; 327 328 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 329 err = hfs_brec_find(&fd); 330 if (err) 331 goto out; 332 333 err = hfs_brec_remove(&fd); 334 if (err) 335 goto out; 336 337 dir->i_size--; 338 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 339 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); 340 out: 341 hfs_find_exit(&fd); 342 343 return err; 344 } 345 346 int hfsplus_rename_cat(u32 cnid, 347 struct inode *src_dir, struct qstr *src_name, 348 struct inode *dst_dir, struct qstr *dst_name) 349 { 350 struct super_block *sb = src_dir->i_sb; 351 struct hfs_find_data src_fd, dst_fd; 352 hfsplus_cat_entry entry; 353 int entry_size, type; 354 int err; 355 356 dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", 357 cnid, src_dir->i_ino, src_name->name, 358 dst_dir->i_ino, dst_name->name); 359 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd); 360 if (err) 361 return err; 362 dst_fd = src_fd; 363 364 /* find the old dir entry and read the data */ 365 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 366 err = hfs_brec_find(&src_fd); 367 if (err) 368 goto out; 369 if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) { 370 err = -EIO; 371 goto out; 372 } 373 374 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, 375 src_fd.entrylength); 376 377 /* create new dir entry with the data from the old entry */ 378 hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); 379 err = hfs_brec_find(&dst_fd); 380 if (err != -ENOENT) { 381 if (!err) 382 err = -EEXIST; 383 goto out; 384 } 385 386 err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); 387 if (err) 388 goto out; 389 dst_dir->i_size++; 390 dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; 391 392 /* finally remove the old entry */ 393 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 394 err = hfs_brec_find(&src_fd); 395 if (err) 396 goto out; 397 err = hfs_brec_remove(&src_fd); 398 if (err) 399 goto out; 400 src_dir->i_size--; 401 src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; 402 403 /* remove old thread entry */ 404 hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); 405 err = hfs_brec_find(&src_fd); 406 if (err) 407 goto out; 408 type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); 409 err = hfs_brec_remove(&src_fd); 410 if (err) 411 goto out; 412 413 /* create new thread entry */ 414 hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); 415 entry_size = hfsplus_fill_cat_thread(sb, &entry, type, 416 dst_dir->i_ino, dst_name); 417 err = hfs_brec_find(&dst_fd); 418 if (err != -ENOENT) { 419 if (!err) 420 err = -EEXIST; 421 goto out; 422 } 423 err = hfs_brec_insert(&dst_fd, &entry, entry_size); 424 425 hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY); 426 hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY); 427 out: 428 hfs_bnode_put(dst_fd.bnode); 429 hfs_find_exit(&src_fd); 430 return err; 431 } 432