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