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 #include <linux/sched.h> 12 13 #include "hfsplus_fs.h" 14 #include "hfsplus_raw.h" 15 16 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1, 17 const hfsplus_btree_key *k2) 18 { 19 __be32 k1p, k2p; 20 21 k1p = k1->cat.parent; 22 k2p = k2->cat.parent; 23 if (k1p != k2p) 24 return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; 25 26 return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name); 27 } 28 29 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1, 30 const hfsplus_btree_key *k2) 31 { 32 __be32 k1p, k2p; 33 34 k1p = k1->cat.parent; 35 k2p = k2->cat.parent; 36 if (k1p != k2p) 37 return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; 38 39 return hfsplus_strcmp(&k1->cat.name, &k2->cat.name); 40 } 41 42 void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key, 43 u32 parent, struct qstr *str) 44 { 45 int len; 46 47 key->cat.parent = cpu_to_be32(parent); 48 if (str) { 49 hfsplus_asc2uni(sb, &key->cat.name, str->name, str->len); 50 len = be16_to_cpu(key->cat.name.length); 51 } else { 52 key->cat.name.length = 0; 53 len = 0; 54 } 55 key->key_len = cpu_to_be16(6 + 2 * len); 56 } 57 58 static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent, 59 struct hfsplus_unistr *name) 60 { 61 int ustrlen; 62 63 ustrlen = be16_to_cpu(name->length); 64 key->cat.parent = cpu_to_be32(parent); 65 key->cat.name.length = cpu_to_be16(ustrlen); 66 ustrlen *= 2; 67 memcpy(key->cat.name.unicode, name->unicode, ustrlen); 68 key->key_len = cpu_to_be16(6 + ustrlen); 69 } 70 71 static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms) 72 { 73 if (inode->i_flags & S_IMMUTABLE) 74 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; 75 else 76 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; 77 if (inode->i_flags & S_APPEND) 78 perms->rootflags |= HFSPLUS_FLG_APPEND; 79 else 80 perms->rootflags &= ~HFSPLUS_FLG_APPEND; 81 HFSPLUS_I(inode).rootflags = perms->rootflags; 82 HFSPLUS_I(inode).userflags = perms->userflags; 83 perms->mode = cpu_to_be16(inode->i_mode); 84 perms->owner = cpu_to_be32(inode->i_uid); 85 perms->group = cpu_to_be32(inode->i_gid); 86 } 87 88 static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode) 89 { 90 if (S_ISDIR(inode->i_mode)) { 91 struct hfsplus_cat_folder *folder; 92 93 folder = &entry->folder; 94 memset(folder, 0, sizeof(*folder)); 95 folder->type = cpu_to_be16(HFSPLUS_FOLDER); 96 folder->id = cpu_to_be32(inode->i_ino); 97 HFSPLUS_I(inode).create_date = 98 folder->create_date = 99 folder->content_mod_date = 100 folder->attribute_mod_date = 101 folder->access_date = hfsp_now2mt(); 102 hfsplus_set_perms(inode, &folder->permissions); 103 if (inode == HFSPLUS_SB(inode->i_sb).hidden_dir) 104 /* invisible and namelocked */ 105 folder->user_info.frFlags = cpu_to_be16(0x5000); 106 return sizeof(*folder); 107 } else { 108 struct hfsplus_cat_file *file; 109 110 file = &entry->file; 111 memset(file, 0, sizeof(*file)); 112 file->type = cpu_to_be16(HFSPLUS_FILE); 113 file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); 114 file->id = cpu_to_be32(cnid); 115 HFSPLUS_I(inode).create_date = 116 file->create_date = 117 file->content_mod_date = 118 file->attribute_mod_date = 119 file->access_date = hfsp_now2mt(); 120 if (cnid == inode->i_ino) { 121 hfsplus_set_perms(inode, &file->permissions); 122 if (S_ISLNK(inode->i_mode)) { 123 file->user_info.fdType = cpu_to_be32(HFSP_SYMLINK_TYPE); 124 file->user_info.fdCreator = cpu_to_be32(HFSP_SYMLINK_CREATOR); 125 } else { 126 file->user_info.fdType = cpu_to_be32(HFSPLUS_SB(inode->i_sb).type); 127 file->user_info.fdCreator = cpu_to_be32(HFSPLUS_SB(inode->i_sb).creator); 128 } 129 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) 130 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); 131 } else { 132 file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE); 133 file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR); 134 file->user_info.fdFlags = cpu_to_be16(0x100); 135 file->create_date = HFSPLUS_I(HFSPLUS_SB(inode->i_sb).hidden_dir).create_date; 136 file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode).dev); 137 } 138 return sizeof(*file); 139 } 140 } 141 142 static int hfsplus_fill_cat_thread(struct super_block *sb, 143 hfsplus_cat_entry *entry, int type, 144 u32 parentid, struct qstr *str) 145 { 146 entry->type = cpu_to_be16(type); 147 entry->thread.reserved = 0; 148 entry->thread.parentID = cpu_to_be32(parentid); 149 hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len); 150 return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; 151 } 152 153 /* Try to get a catalog entry for given catalog id */ 154 int hfsplus_find_cat(struct super_block *sb, u32 cnid, 155 struct hfs_find_data *fd) 156 { 157 hfsplus_cat_entry tmp; 158 int err; 159 u16 type; 160 161 hfsplus_cat_build_key(sb, fd->search_key, cnid, NULL); 162 err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry)); 163 if (err) 164 return err; 165 166 type = be16_to_cpu(tmp.type); 167 if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { 168 printk(KERN_ERR "hfs: found bad thread record in catalog\n"); 169 return -EIO; 170 } 171 172 hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), 173 &tmp.thread.nodeName); 174 return hfs_brec_find(fd); 175 } 176 177 int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode) 178 { 179 struct hfs_find_data fd; 180 struct super_block *sb; 181 hfsplus_cat_entry entry; 182 int entry_size; 183 int err; 184 185 dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); 186 sb = dir->i_sb; 187 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); 188 189 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 190 entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? 191 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, 192 dir->i_ino, str); 193 err = hfs_brec_find(&fd); 194 if (err != -ENOENT) { 195 if (!err) 196 err = -EEXIST; 197 goto err2; 198 } 199 err = hfs_brec_insert(&fd, &entry, entry_size); 200 if (err) 201 goto err2; 202 203 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 204 entry_size = hfsplus_cat_build_record(&entry, cnid, inode); 205 err = hfs_brec_find(&fd); 206 if (err != -ENOENT) { 207 /* panic? */ 208 if (!err) 209 err = -EEXIST; 210 goto err1; 211 } 212 err = hfs_brec_insert(&fd, &entry, entry_size); 213 if (err) 214 goto err1; 215 216 dir->i_size++; 217 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 218 mark_inode_dirty(dir); 219 hfs_find_exit(&fd); 220 return 0; 221 222 err1: 223 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 224 if (!hfs_brec_find(&fd)) 225 hfs_brec_remove(&fd); 226 err2: 227 hfs_find_exit(&fd); 228 return err; 229 } 230 231 int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) 232 { 233 struct super_block *sb; 234 struct hfs_find_data fd; 235 struct hfsplus_fork_raw fork; 236 struct list_head *pos; 237 int err, off; 238 u16 type; 239 240 dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); 241 sb = dir->i_sb; 242 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); 243 244 if (!str) { 245 int len; 246 247 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 248 err = hfs_brec_find(&fd); 249 if (err) 250 goto out; 251 252 off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); 253 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); 254 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); 255 len = be16_to_cpu(fd.search_key->cat.name.length) * 2; 256 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); 257 fd.search_key->key_len = cpu_to_be16(6 + len); 258 } else 259 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 260 261 err = hfs_brec_find(&fd); 262 if (err) 263 goto out; 264 265 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); 266 if (type == HFSPLUS_FILE) { 267 #if 0 268 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); 269 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); 270 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); 271 #endif 272 273 off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); 274 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); 275 hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); 276 } 277 278 list_for_each(pos, &HFSPLUS_I(dir).open_dir_list) { 279 struct hfsplus_readdir_data *rd = 280 list_entry(pos, struct hfsplus_readdir_data, list); 281 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) 282 rd->file->f_pos--; 283 } 284 285 err = hfs_brec_remove(&fd); 286 if (err) 287 goto out; 288 289 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 290 err = hfs_brec_find(&fd); 291 if (err) 292 goto out; 293 294 err = hfs_brec_remove(&fd); 295 if (err) 296 goto out; 297 298 dir->i_size--; 299 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 300 mark_inode_dirty(dir); 301 out: 302 hfs_find_exit(&fd); 303 304 return err; 305 } 306 307 int hfsplus_rename_cat(u32 cnid, 308 struct inode *src_dir, struct qstr *src_name, 309 struct inode *dst_dir, struct qstr *dst_name) 310 { 311 struct super_block *sb; 312 struct hfs_find_data src_fd, dst_fd; 313 hfsplus_cat_entry entry; 314 int entry_size, type; 315 int err = 0; 316 317 dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, 318 dst_dir->i_ino, dst_name->name); 319 sb = src_dir->i_sb; 320 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &src_fd); 321 dst_fd = src_fd; 322 323 /* find the old dir entry and read the data */ 324 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 325 err = hfs_brec_find(&src_fd); 326 if (err) 327 goto out; 328 329 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, 330 src_fd.entrylength); 331 332 /* create new dir entry with the data from the old entry */ 333 hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); 334 err = hfs_brec_find(&dst_fd); 335 if (err != -ENOENT) { 336 if (!err) 337 err = -EEXIST; 338 goto out; 339 } 340 341 err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); 342 if (err) 343 goto out; 344 dst_dir->i_size++; 345 dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; 346 mark_inode_dirty(dst_dir); 347 348 /* finally remove the old entry */ 349 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 350 err = hfs_brec_find(&src_fd); 351 if (err) 352 goto out; 353 err = hfs_brec_remove(&src_fd); 354 if (err) 355 goto out; 356 src_dir->i_size--; 357 src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; 358 mark_inode_dirty(src_dir); 359 360 /* remove old thread entry */ 361 hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); 362 err = hfs_brec_find(&src_fd); 363 if (err) 364 goto out; 365 type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); 366 err = hfs_brec_remove(&src_fd); 367 if (err) 368 goto out; 369 370 /* create new thread entry */ 371 hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); 372 entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name); 373 err = hfs_brec_find(&dst_fd); 374 if (err != -ENOENT) { 375 if (!err) 376 err = -EEXIST; 377 goto out; 378 } 379 err = hfs_brec_insert(&dst_fd, &entry, entry_size); 380 out: 381 hfs_bnode_put(dst_fd.bnode); 382 hfs_find_exit(&src_fd); 383 return err; 384 } 385