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 70static 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 87static 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 141static 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 */ 153int hfsplus_find_cat(hfsplus_handle_t *hfsplus_handle, 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(hfsplus_handle, 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 hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), 172 &tmp.thread.nodeName); 173 return hfs_brec_find(hfsplus_handle, fd); 174} 175 176int hfsplus_create_cat(hfsplus_handle_t *hfsplus_handle, u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode) 177{ 178 struct hfs_find_data fd; 179 struct super_block *sb; 180 hfsplus_cat_entry entry; 181 int entry_size; 182 int err; 183 184 dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); 185 sb = dir->i_sb; 186 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); 187 188 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 189 entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? 190 HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, 191 dir->i_ino, str); 192 err = hfs_brec_find(hfsplus_handle, &fd); 193 if (err != -ENOENT) { 194 if (!err) 195 err = -EEXIST; 196 goto err2; 197 } 198 err = hfs_brec_insert(hfsplus_handle, &fd, &entry, entry_size); 199 if (err) 200 goto err2; 201 202 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 203 entry_size = hfsplus_cat_build_record(&entry, cnid, inode); 204 err = hfs_brec_find(hfsplus_handle, &fd); 205 if (err != -ENOENT) { 206 /* panic? */ 207 if (!err) 208 err = -EEXIST; 209 goto err1; 210 } 211 err = hfs_brec_insert(hfsplus_handle, &fd, &entry, entry_size); 212 if (err) 213 goto err1; 214 215 dir->i_size++; 216 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 217 if (hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, dir)) { 218 err = -1; 219 goto err2; 220 } 221 hfs_find_exit(hfsplus_handle, &fd); 222 return 0; 223 224err1: 225 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 226 if (!hfs_brec_find(hfsplus_handle, &fd)) 227 hfs_brec_remove(hfsplus_handle, &fd); 228err2: 229 hfs_find_exit(hfsplus_handle, &fd); 230 return err; 231} 232 233int hfsplus_delete_cat(hfsplus_handle_t *hfsplus_handle, u32 cnid, struct inode *dir, struct qstr *str) 234{ 235 struct super_block *sb; 236 struct hfs_find_data fd; 237 struct hfsplus_fork_raw fork; 238 struct list_head *pos; 239 int err, off; 240 u16 type; 241 242 dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); 243 sb = dir->i_sb; 244 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); 245 246 if (!str) { 247 int len; 248 249 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 250 err = hfs_brec_find(hfsplus_handle, &fd); 251 if (err) 252 goto out; 253 254 off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); 255 fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); 256 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); 257 len = be16_to_cpu(fd.search_key->cat.name.length) * 2; 258 hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); 259 fd.search_key->key_len = cpu_to_be16(6 + len); 260 } else 261 hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); 262 263 err = hfs_brec_find(hfsplus_handle, &fd); 264 if (err) 265 goto out; 266 267 type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); 268 if (type == HFSPLUS_FILE) { 269 270 off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); 271 hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); 272 hfsplus_free_fork(hfsplus_handle, sb, cnid, &fork, HFSPLUS_TYPE_RSRC); 273 } 274 275 list_for_each(pos, &HFSPLUS_I(dir).open_dir_list) { 276 struct hfsplus_readdir_data *rd = 277 list_entry(pos, struct hfsplus_readdir_data, list); 278 if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) 279 rd->file->f_pos--; 280 } 281 282 err = hfs_brec_remove(hfsplus_handle, &fd); 283 if (err) 284 goto out; 285 286 hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); 287 err = hfs_brec_find(hfsplus_handle, &fd); 288 if (err) 289 goto out; 290 291 err = hfs_brec_remove(hfsplus_handle, &fd); 292 if (err) 293 goto out; 294 295 dir->i_size--; 296 dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; 297 if (hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, dir)) 298 err = -1; 299out: 300 hfs_find_exit(hfsplus_handle, &fd); 301 302 return err; 303} 304 305int hfsplus_rename_cat(hfsplus_handle_t *hfsplus_handle, u32 cnid, 306 struct inode *src_dir, struct qstr *src_name, 307 struct inode *dst_dir, struct qstr *dst_name) 308{ 309 struct super_block *sb; 310 struct hfs_find_data src_fd, dst_fd; 311 hfsplus_cat_entry entry; 312 int entry_size, type; 313 int err = 0; 314 315 dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, 316 dst_dir->i_ino, dst_name->name); 317 sb = src_dir->i_sb; 318 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &src_fd); 319 dst_fd = src_fd; 320 321 /* find the old dir entry and read the data */ 322 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 323 err = hfs_brec_find(hfsplus_handle, &src_fd); 324 if (err) 325 goto out; 326 327 hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, 328 src_fd.entrylength); 329 330 /* create new dir entry with the data from the old entry */ 331 hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); 332 err = hfs_brec_find(hfsplus_handle, &dst_fd); 333 if (err != -ENOENT) { 334 if (!err) 335 err = -EEXIST; 336 goto out; 337 } 338 339 err = hfs_brec_insert(hfsplus_handle, &dst_fd, &entry, src_fd.entrylength); 340 if (err) 341 goto out; 342 dst_dir->i_size++; 343 dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; 344 if (hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, dst_dir)) { 345 err = -1; 346 goto out; 347 } 348 349 /* finally remove the old entry */ 350 hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); 351 err = hfs_brec_find(hfsplus_handle, &src_fd); 352 if (err) 353 goto out; 354 err = hfs_brec_remove(hfsplus_handle, &src_fd); 355 if (err) 356 goto out; 357 src_dir->i_size--; 358 src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; 359 if (hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, src_dir)) { 360 err = -1; 361 goto out; 362 } 363 364 /* remove old thread entry */ 365 hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); 366 err = hfs_brec_find(hfsplus_handle, &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(hfsplus_handle, &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(hfsplus_handle, &dst_fd); 378 if (err != -ENOENT) { 379 if (!err) 380 err = -EEXIST; 381 goto out; 382 } 383 err = hfs_brec_insert(hfsplus_handle, &dst_fd, &entry, entry_size); 384out: 385 hfs_bnode_put(hfsplus_handle, dst_fd.bnode); 386 hfs_find_exit(hfsplus_handle, &src_fd); 387 return err; 388} 389