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(inode->i_uid); 84 perms->group = cpu_to_be32(inode->i_gid); 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 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); 216 217 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 218 entry_size = hfsplus_fill_cat_thread(sb, &entry, 219 S_ISDIR(inode->i_mode) ? 220 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, 221 dir->i_ino, str); 222 err = hfs_brec_find(&fd); 223 if (err != -ENOENT) { 224 if (!err) 225 err = -EEXIST; 226 goto err2; 227 } 228 err = hfs_brec_insert(&fd, &entry, entry_size); 229 if (err) 230 goto err2; 231 232 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 233 entry_size = hfsplus_cat_build_record(&entry, cnid, inode); 234 err = hfs_brec_find(&fd); 235 if (err != -ENOENT) { 236 /* panic? */ 237 if (!err) 238 err = -EEXIST; 239 goto err1; 240 } 241 err = hfs_brec_insert(&fd, &entry, entry_size); 242 if (err) 243 goto err1; 244 245 dir->i_size++; 246 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 247 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); 248 249 hfs_find_exit(&fd); 250 return 0; 251 252 err1: 253 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 254 if (!hfs_brec_find(&fd)) 255 hfs_brec_remove(&fd); 256 err2: 257 hfs_find_exit(&fd); 258 return err; 259 } 260 261 int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) 262 { 263 struct super_block *sb = dir->i_sb; 264 struct hfs_find_data fd; 265 struct hfsplus_fork_raw fork; 266 struct list_head *pos; 267 int err, off; 268 u16 type; 269 270 dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", 271 str ? str->name : NULL, cnid); 272 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); 273 274 if (!str) { 275 int len; 276 277 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 278 err = hfs_brec_find(&fd); 279 if (err) 280 goto out; 281 282 off = fd.entryoffset + 283 offsetof(struct hfsplus_cat_thread, nodeName); 284 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); 285 hfs_bnode_read(fd.bnode, 286 &fd.search_key->cat.name.length, off, 2); 287 len = be16_to_cpu(fd.search_key->cat.name.length) * 2; 288 hfs_bnode_read(fd.bnode, 289 &fd.search_key->cat.name.unicode, 290 off + 2, len); 291 fd.search_key->key_len = cpu_to_be16(6 + len); 292 } else 293 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 294 295 err = hfs_brec_find(&fd); 296 if (err) 297 goto out; 298 299 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); 300 if (type == HFSPLUS_FILE) { 301 #if 0 302 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); 303 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); 304 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); 305 #endif 306 307 off = fd.entryoffset + 308 offsetof(struct hfsplus_cat_file, rsrc_fork); 309 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); 310 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); 311 } 312 313 list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) { 314 struct hfsplus_readdir_data *rd = 315 list_entry(pos, struct hfsplus_readdir_data, list); 316 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) 317 rd->file->f_pos--; 318 } 319 320 err = hfs_brec_remove(&fd); 321 if (err) 322 goto out; 323 324 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 325 err = hfs_brec_find(&fd); 326 if (err) 327 goto out; 328 329 err = hfs_brec_remove(&fd); 330 if (err) 331 goto out; 332 333 dir->i_size--; 334 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 335 hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); 336 out: 337 hfs_find_exit(&fd); 338 339 return err; 340 } 341 342 int hfsplus_rename_cat(u32 cnid, 343 struct inode *src_dir, struct qstr *src_name, 344 struct inode *dst_dir, struct qstr *dst_name) 345 { 346 struct super_block *sb = src_dir->i_sb; 347 struct hfs_find_data src_fd, dst_fd; 348 hfsplus_cat_entry entry; 349 int entry_size, type; 350 int err = 0; 351 352 dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", 353 cnid, src_dir->i_ino, src_name->name, 354 dst_dir->i_ino, dst_name->name); 355 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd); 356 dst_fd = src_fd; 357 358 /* find the old dir entry and read the data */ 359 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 360 err = hfs_brec_find(&src_fd); 361 if (err) 362 goto out; 363 364 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, 365 src_fd.entrylength); 366 367 /* create new dir entry with the data from the old entry */ 368 hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); 369 err = hfs_brec_find(&dst_fd); 370 if (err != -ENOENT) { 371 if (!err) 372 err = -EEXIST; 373 goto out; 374 } 375 376 err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); 377 if (err) 378 goto out; 379 dst_dir->i_size++; 380 dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; 381 382 /* finally remove the old entry */ 383 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 384 err = hfs_brec_find(&src_fd); 385 if (err) 386 goto out; 387 err = hfs_brec_remove(&src_fd); 388 if (err) 389 goto out; 390 src_dir->i_size--; 391 src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; 392 393 /* remove old thread entry */ 394 hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); 395 err = hfs_brec_find(&src_fd); 396 if (err) 397 goto out; 398 type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); 399 err = hfs_brec_remove(&src_fd); 400 if (err) 401 goto out; 402 403 /* create new thread entry */ 404 hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); 405 entry_size = hfsplus_fill_cat_thread(sb, &entry, type, 406 dst_dir->i_ino, dst_name); 407 err = hfs_brec_find(&dst_fd); 408 if (err != -ENOENT) { 409 if (!err) 410 err = -EEXIST; 411 goto out; 412 } 413 err = hfs_brec_insert(&dst_fd, &entry, entry_size); 414 415 hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY); 416 hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY); 417 out: 418 hfs_bnode_put(dst_fd.bnode); 419 hfs_find_exit(&src_fd); 420 return err; 421 } 422