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