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 15int 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 28int 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 41void 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 57static 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 70void 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 94static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode) 95{ 96 if (S_ISDIR(inode->i_mode)) { 97 struct hfsplus_cat_folder *folder; 98 99 folder = &entry->folder; 100 memset(folder, 0, sizeof(*folder)); 101 folder->type = cpu_to_be16(HFSPLUS_FOLDER); 102 folder->id = cpu_to_be32(inode->i_ino); 103 HFSPLUS_I(inode).create_date = 104 folder->create_date = 105 folder->content_mod_date = 106 folder->attribute_mod_date = 107 folder->access_date = hfsp_now2mt(); 108 hfsplus_cat_set_perms(inode, &folder->permissions); 109 if (inode == HFSPLUS_SB(inode->i_sb).hidden_dir) 110 /* invisible and namelocked */ 111 folder->user_info.frFlags = cpu_to_be16(0x5000); 112 return sizeof(*folder); 113 } else { 114 struct hfsplus_cat_file *file; 115 116 file = &entry->file; 117 memset(file, 0, sizeof(*file)); 118 file->type = cpu_to_be16(HFSPLUS_FILE); 119 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); 120 file->id = cpu_to_be32(cnid); 121 HFSPLUS_I(inode).create_date = 122 file->create_date = 123 file->content_mod_date = 124 file->attribute_mod_date = 125 file->access_date = hfsp_now2mt(); 126 if (cnid == inode->i_ino) { 127 hfsplus_cat_set_perms(inode, &file->permissions); 128 if (S_ISLNK(inode->i_mode)) { 129 file->user_info.fdType = cpu_to_be32(HFSP_SYMLINK_TYPE); 130 file->user_info.fdCreator = cpu_to_be32(HFSP_SYMLINK_CREATOR); 131 } else { 132 file->user_info.fdType = cpu_to_be32(HFSPLUS_SB(inode->i_sb).type); 133 file->user_info.fdCreator = cpu_to_be32(HFSPLUS_SB(inode->i_sb).creator); 134 } 135 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) 136 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); 137 } else { 138 file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE); 139 file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR); 140 file->user_info.fdFlags = cpu_to_be16(0x100); 141 file->create_date = HFSPLUS_I(HFSPLUS_SB(inode->i_sb).hidden_dir).create_date; 142 file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode).linkid); 143 } 144 return sizeof(*file); 145 } 146} 147 148static int hfsplus_fill_cat_thread(struct super_block *sb, 149 hfsplus_cat_entry *entry, int type, 150 u32 parentid, struct qstr *str) 151{ 152 entry->type = cpu_to_be16(type); 153 entry->thread.reserved = 0; 154 entry->thread.parentID = cpu_to_be32(parentid); 155 hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len); 156 return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; 157} 158 159/* Try to get a catalog entry for given catalog id */ 160int hfsplus_find_cat(hfsplus_handle_t *hfsplus_handle, struct super_block *sb, u32 cnid, 161 struct hfs_find_data *fd) 162{ 163 hfsplus_cat_entry tmp; 164 int err; 165 u16 type; 166 167 hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL); 168 err = hfs_brec_read(hfsplus_handle, fd, &tmp, sizeof(hfsplus_cat_entry)); 169 if (err) 170 return err; 171 172 type = be16_to_cpu(tmp.type); 173 if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { 174 printk(KERN_ERR "hfs: found bad thread record in catalog\n"); 175 return -EIO; 176 } 177 178 if (be16_to_cpu(tmp.thread.nodeName.length) > 255) { 179 printk(KERN_ERR "hfs: catalog name length corrupted\n"); 180 return -EIO; 181 } 182 183 hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), 184 &tmp.thread.nodeName); 185 return hfs_brec_find(hfsplus_handle, fd); 186} 187 188int hfsplus_create_cat(hfsplus_handle_t *hfsplus_handle, u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode) 189{ 190 struct hfs_find_data fd; 191 struct super_block *sb; 192 hfsplus_cat_entry entry; 193 int entry_size; 194 int err; 195 196 dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); 197 sb = dir->i_sb; 198 err = hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); 199 if (err) 200 return err; 201 202 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 203 entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? 204 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, 205 dir->i_ino, str); 206 err = hfs_brec_find(hfsplus_handle, &fd); 207 if (err != -ENOENT) { 208 if (!err) 209 err = -EEXIST; 210 goto err2; 211 } 212 err = hfs_brec_insert(hfsplus_handle, &fd, &entry, entry_size); 213 if (err) 214 goto err2; 215 216 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 217 entry_size = hfsplus_cat_build_record(&entry, cnid, inode); 218 err = hfs_brec_find(hfsplus_handle, &fd); 219 if (err != -ENOENT) { 220 /* panic? */ 221 if (!err) 222 err = -EEXIST; 223 goto err1; 224 } 225 err = hfs_brec_insert(hfsplus_handle, &fd, &entry, entry_size); 226 if (err) 227 goto err1; 228 229 dir->i_size++; 230 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 231 if (hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, dir)) { 232 err = -1; 233 goto err2; 234 } 235 hfs_find_exit(hfsplus_handle, &fd); 236 return 0; 237 238err1: 239 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 240 if (!hfs_brec_find(hfsplus_handle, &fd)) 241 hfs_brec_remove(hfsplus_handle, &fd); 242err2: 243 hfs_find_exit(hfsplus_handle, &fd); 244 return err; 245} 246 247int hfsplus_delete_cat(hfsplus_handle_t *hfsplus_handle, u32 cnid, struct inode *dir, struct qstr *str) 248{ 249 struct super_block *sb; 250 struct hfs_find_data fd; 251 struct hfsplus_fork_raw fork; 252 struct list_head *pos; 253 int err, off; 254 u16 type; 255 256 dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); 257 sb = dir->i_sb; 258 err = hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); 259 if (err) 260 return err; 261 262 if (!str) { 263 int len; 264 265 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 266 err = hfs_brec_find(hfsplus_handle, &fd); 267 if (err) 268 goto out; 269 270 off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); 271 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); 272 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); 273 len = be16_to_cpu(fd.search_key->cat.name.length) * 2; 274 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); 275 fd.search_key->key_len = cpu_to_be16(6 + len); 276 } else 277 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 278 279 err = hfs_brec_find(hfsplus_handle, &fd); 280 if (err) 281 goto out; 282 283 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); 284 if (type == HFSPLUS_FILE) { 285 286 off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); 287 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); 288 hfsplus_free_fork(hfsplus_handle, sb, cnid, &fork, HFSPLUS_TYPE_RSRC); 289 } 290 291 list_for_each(pos, &HFSPLUS_I(dir).open_dir_list) { 292 struct hfsplus_readdir_data *rd = 293 list_entry(pos, struct hfsplus_readdir_data, list); 294 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) 295 rd->file->f_pos--; 296 } 297 298 err = hfs_brec_remove(hfsplus_handle, &fd); 299 if (err) 300 goto out; 301 302 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 303 err = hfs_brec_find(hfsplus_handle, &fd); 304 if (err) 305 goto out; 306 307 err = hfs_brec_remove(hfsplus_handle, &fd); 308 if (err) 309 goto out; 310 311 dir->i_size--; 312 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 313 mark_inode_dirty(dir); 314out: 315 hfs_find_exit(hfsplus_handle, &fd); 316 317 return err; 318} 319 320int hfsplus_rename_cat(hfsplus_handle_t *hfsplus_handle, u32 cnid, 321 struct inode *src_dir, struct qstr *src_name, 322 struct inode *dst_dir, struct qstr *dst_name) 323{ 324 struct super_block *sb; 325 struct hfs_find_data src_fd, dst_fd; 326 hfsplus_cat_entry entry; 327 int entry_size, type; 328 int err = 0; 329 330 dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, 331 dst_dir->i_ino, dst_name->name); 332 sb = src_dir->i_sb; 333 err = hfs_find_init(HFSPLUS_SB(sb).cat_tree, &src_fd); 334 if (err) 335 return err; 336 dst_fd = src_fd; 337 338 /* find the old dir entry and read the data */ 339 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 340 err = hfs_brec_find(hfsplus_handle, &src_fd); 341 if (err) 342 goto out; 343 if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) { 344 err = -EIO; 345 goto out; 346 } 347 348 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, 349 src_fd.entrylength); 350 351 /* create new dir entry with the data from the old entry */ 352 hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); 353 err = hfs_brec_find(hfsplus_handle, &dst_fd); 354 if (err != -ENOENT) { 355 if (!err) 356 err = -EEXIST; 357 goto out; 358 } 359 360 err = hfs_brec_insert(hfsplus_handle, &dst_fd, &entry, src_fd.entrylength); 361 if (err) 362 goto out; 363 dst_dir->i_size++; 364 dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; 365 mark_inode_dirty(dst_dir); 366 367 /* finally remove the old entry */ 368 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 369 err = hfs_brec_find(hfsplus_handle, &src_fd); 370 if (err) 371 goto out; 372 err = hfs_brec_remove(hfsplus_handle, &src_fd); 373 if (err) 374 goto out; 375 src_dir->i_size--; 376 src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; 377 mark_inode_dirty(src_dir); 378 379 /* remove old thread entry */ 380 hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); 381 err = hfs_brec_find(hfsplus_handle, &src_fd); 382 if (err) 383 goto out; 384 type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); 385 err = hfs_brec_remove(hfsplus_handle, &src_fd); 386 if (err) 387 goto out; 388 389 /* create new thread entry */ 390 hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); 391 entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name); 392 err = hfs_brec_find(hfsplus_handle, &dst_fd); 393 if (err != -ENOENT) { 394 if (!err) 395 err = -EEXIST; 396 goto out; 397 } 398 err = hfs_brec_insert(hfsplus_handle, &dst_fd, &entry, entry_size); 399out: 400 hfs_bnode_put(hfsplus_handle, dst_fd.bnode); 401 hfs_find_exit(hfsplus_handle, &src_fd); 402 return err; 403} 404