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