// SPDX-License-Identifier: GPL-2.0 /* * linux/fs/hfsplus/catalog.c * * Copyright (C) 2001 * Brad Boyer (flar@allandria.com) * (C) 2003 Ardis Technologies <roman@ardistech.com> * * Handling of catalog records */ #include "hfsplus_fs.h" #include "hfsplus_raw.h" int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1, const hfsplus_btree_key *k2) { __be32 k1p, k2p; k1p = k1->cat.parent; k2p = k2->cat.parent; if (k1p != k2p) return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name); } int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1, const hfsplus_btree_key *k2) { __be32 k1p, k2p; k1p = k1->cat.parent; k2p = k2->cat.parent; if (k1p != k2p) return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1; return hfsplus_strcmp(&k1->cat.name, &k2->cat.name); } /* Generates key for catalog file/folders record. */ int hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key, u32 parent, const struct qstr *str) { int len, err; key->cat.parent = cpu_to_be32(parent); err = hfsplus_asc2uni(sb, &key->cat.name, HFSPLUS_MAX_STRLEN, str->name, str->len); if (unlikely(err < 0)) return err; len = be16_to_cpu(key->cat.name.length); key->key_len = cpu_to_be16(6 + 2 * len); return 0; } /* Generates key for catalog thread record. */ void hfsplus_cat_build_key_with_cnid(struct super_block *sb, hfsplus_btree_key *key, u32 parent) { key->cat.parent = cpu_to_be32(parent); key->cat.name.length = 0; key->key_len = cpu_to_be16(6); } static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent, struct hfsplus_unistr *name) { int ustrlen; ustrlen = be16_to_cpu(name->length); key->cat.parent = cpu_to_be32(parent); key->cat.name.length = cpu_to_be16(ustrlen); ustrlen *= 2; memcpy(key->cat.name.unicode, name->unicode, ustrlen); key->key_len = cpu_to_be16(6 + ustrlen); } void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms) { if (inode->i_flags & S_IMMUTABLE) perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; else perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; if (inode->i_flags & S_APPEND) perms->rootflags |= HFSPLUS_FLG_APPEND; else perms->rootflags &= ~HFSPLUS_FLG_APPEND; perms->userflags = HFSPLUS_I(inode)->userflags; perms->mode = cpu_to_be16(inode->i_mode); perms->owner = cpu_to_be32(i_uid_read(inode)); perms->group = cpu_to_be32(i_gid_read(inode)); if (S_ISREG(inode->i_mode)) perms->dev = cpu_to_be32(inode->i_nlink); else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) perms->dev = cpu_to_be32(inode->i_rdev); else perms->dev = 0; } static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); if (S_ISDIR(inode->i_mode)) { struct hfsplus_cat_folder *folder; folder = &entry->folder; memset(folder, 0, sizeof(*folder)); folder->type = cpu_to_be16(HFSPLUS_FOLDER); if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) folder->flags |= cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT); folder->id = cpu_to_be32(inode->i_ino); HFSPLUS_I(inode)->create_date = folder->create_date = folder->content_mod_date = folder->attribute_mod_date = folder->access_date = hfsp_now2mt(); hfsplus_cat_set_perms(inode, &folder->permissions); if (inode == sbi->hidden_dir) /* invisible and namelocked */ folder->user_info.frFlags = cpu_to_be16(0x5000); return sizeof(*folder); } else { struct hfsplus_cat_file *file; file = &entry->file; memset(file, 0, sizeof(*file)); file->type = cpu_to_be16(HFSPLUS_FILE); file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS); file->id = cpu_to_be32(cnid); HFSPLUS_I(inode)->create_date = file->create_date = file->content_mod_date = file->attribute_mod_date = file->access_date = hfsp_now2mt(); if (cnid == inode->i_ino) { hfsplus_cat_set_perms(inode, &file->permissions); if (S_ISLNK(inode->i_mode)) { file->user_info.fdType = cpu_to_be32(HFSP_SYMLINK_TYPE); file->user_info.fdCreator = cpu_to_be32(HFSP_SYMLINK_CREATOR); } else { file->user_info.fdType = cpu_to_be32(sbi->type); file->user_info.fdCreator = cpu_to_be32(sbi->creator); } if (HFSPLUS_FLG_IMMUTABLE & (file->permissions.rootflags | file->permissions.userflags)) file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); } else { file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE); file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR); file->user_info.fdFlags = cpu_to_be16(0x100); file->create_date = HFSPLUS_I(sbi->hidden_dir)->create_date; file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode)->linkid); } return sizeof(*file); } } static int hfsplus_fill_cat_thread(struct super_block *sb, hfsplus_cat_entry *entry, int type, u32 parentid, const struct qstr *str) { int err; entry->type = cpu_to_be16(type); entry->thread.reserved = 0; entry->thread.parentID = cpu_to_be32(parentid); err = hfsplus_asc2uni(sb, &entry->thread.nodeName, HFSPLUS_MAX_STRLEN, str->name, str->len); if (unlikely(err < 0)) return err; return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2; } /* Try to get a catalog entry for given catalog id */ int hfsplus_find_cat(struct super_block *sb, u32 cnid, struct hfs_find_data *fd) { hfsplus_cat_entry tmp; int err; u16 type; hfsplus_cat_build_key_with_cnid(sb, fd->search_key, cnid); err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry)); if (err) return err; type = be16_to_cpu(tmp.type); if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) { pr_err("found bad thread record in catalog\n"); return -EIO; } if (be16_to_cpu(tmp.thread.nodeName.length) > 255) { pr_err("catalog name length corrupted\n"); return -EIO; } hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), &tmp.thread.nodeName); return hfs_brec_find(fd, hfs_find_rec_by_key); } static void hfsplus_subfolders_inc(struct inode *dir) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb); if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) { /* * Increment subfolder count. Note, the value is only meaningful * for folders with HFSPLUS_HAS_FOLDER_COUNT flag set. */ HFSPLUS_I(dir)->subfolders++; } } static void hfsplus_subfolders_dec(struct inode *dir) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb); if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) { /* * Decrement subfolder count. Note, the value is only meaningful * for folders with HFSPLUS_HAS_FOLDER_COUNT flag set. * * Check for zero. Some subfolders may have been created * by an implementation ignorant of this counter. */ if (HFSPLUS_I(dir)->subfolders) HFSPLUS_I(dir)->subfolders--; } } int hfsplus_create_cat(u32 cnid, struct inode *dir, const struct qstr *str, struct inode *inode) { struct super_block *sb = dir->i_sb; struct hfs_find_data fd; hfsplus_cat_entry entry; int entry_size; int err; hfs_dbg(CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); if (err) return err; /* * Fail early and avoid ENOSPC during the btree operations. We may * have to split the root node at most once. */ err = hfs_bmap_reserve(fd.tree, 2 * fd.tree->depth); if (err) goto err2; hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid); entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, dir->i_ino, str); if (unlikely(entry_size < 0)) { err = entry_size; goto err2; } err = hfs_brec_find(&fd, hfs_find_rec_by_key); if (err != -ENOENT) { if (!err) err = -EEXIST; goto err2; } err = hfs_brec_insert(&fd, &entry, entry_size); if (err) goto err2; err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); if (unlikely(err)) goto err1; entry_size = hfsplus_cat_build_record(&entry, cnid, inode); err = hfs_brec_find(&fd, hfs_find_rec_by_key); if (err != -ENOENT) { /* panic? */ if (!err) err = -EEXIST; goto err1; } err = hfs_brec_insert(&fd, &entry, entry_size); if (err) goto err1; dir->i_size++; if (S_ISDIR(inode->i_mode)) hfsplus_subfolders_inc(dir); dir->i_mtime = dir->i_ctime = current_time(dir); hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); hfs_find_exit(&fd); return 0; err1: hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid); if (!hfs_brec_find(&fd, hfs_find_rec_by_key)) hfs_brec_remove(&fd); err2: hfs_find_exit(&fd); return err; } int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str) { struct super_block *sb = dir->i_sb; struct hfs_find_data fd; struct hfsplus_fork_raw fork; struct list_head *pos; int err, off; u16 type; hfs_dbg(CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); if (err) return err; /* * Fail early and avoid ENOSPC during the btree operations. We may * have to split the root node at most once. */ err = hfs_bmap_reserve(fd.tree, 2 * (int)fd.tree->depth - 2); if (err) goto out; if (!str) { int len; hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid); err = hfs_brec_find(&fd, hfs_find_rec_by_key); if (err) goto out; off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); len = be16_to_cpu(fd.search_key->cat.name.length) * 2; hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); fd.search_key->key_len = cpu_to_be16(6 + len); } else { err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); if (unlikely(err)) goto out; } err = hfs_brec_find(&fd, hfs_find_rec_by_key); if (err) goto out; type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset); if (type == HFSPLUS_FILE) { #if 0 off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork); hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); #endif off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); } /* we only need to take spinlock for exclusion with ->release() */ spin_lock(&HFSPLUS_I(dir)->open_dir_lock); list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) { struct hfsplus_readdir_data *rd = list_entry(pos, struct hfsplus_readdir_data, list); if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0) rd->file->f_pos--; } spin_unlock(&HFSPLUS_I(dir)->open_dir_lock); err = hfs_brec_remove(&fd); if (err) goto out; hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid); err = hfs_brec_find(&fd, hfs_find_rec_by_key); if (err) goto out; err = hfs_brec_remove(&fd); if (err) goto out; dir->i_size--; if (type == HFSPLUS_FOLDER) hfsplus_subfolders_dec(dir); dir->i_mtime = dir->i_ctime = current_time(dir); hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); if (type == HFSPLUS_FILE || type == HFSPLUS_FOLDER) { if (HFSPLUS_SB(sb)->attr_tree) hfsplus_delete_all_attrs(dir, cnid); } out: hfs_find_exit(&fd); return err; } int hfsplus_rename_cat(u32 cnid, struct inode *src_dir, const struct qstr *src_name, struct inode *dst_dir, const struct qstr *dst_name) { struct super_block *sb = src_dir->i_sb; struct hfs_find_data src_fd, dst_fd; hfsplus_cat_entry entry; int entry_size, type; int err; hfs_dbg(CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, dst_dir->i_ino, dst_name->name); err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd); if (err) return err; dst_fd = src_fd; /* * Fail early and avoid ENOSPC during the btree operations. We may * have to split the root node at most twice. */ err = hfs_bmap_reserve(src_fd.tree, 4 * (int)src_fd.tree->depth - 1); if (err) goto out; /* find the old dir entry and read the data */ err = hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); if (unlikely(err)) goto out; err = hfs_brec_find(&src_fd, hfs_find_rec_by_key); if (err) goto out; if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) { err = -EIO; goto out; } hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, src_fd.entrylength); type = be16_to_cpu(entry.type); /* create new dir entry with the data from the old entry */ err = hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name); if (unlikely(err)) goto out; err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key); if (err != -ENOENT) { if (!err) err = -EEXIST; goto out; } err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength); if (err) goto out; dst_dir->i_size++; if (type == HFSPLUS_FOLDER) hfsplus_subfolders_inc(dst_dir); dst_dir->i_mtime = dst_dir->i_ctime = current_time(dst_dir); /* finally remove the old entry */ err = hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); if (unlikely(err)) goto out; err = hfs_brec_find(&src_fd, hfs_find_rec_by_key); if (err) goto out; err = hfs_brec_remove(&src_fd); if (err) goto out; src_dir->i_size--; if (type == HFSPLUS_FOLDER) hfsplus_subfolders_dec(src_dir); src_dir->i_mtime = src_dir->i_ctime = current_time(src_dir); /* remove old thread entry */ hfsplus_cat_build_key_with_cnid(sb, src_fd.search_key, cnid); err = hfs_brec_find(&src_fd, hfs_find_rec_by_key); if (err) goto out; type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset); err = hfs_brec_remove(&src_fd); if (err) goto out; /* create new thread entry */ hfsplus_cat_build_key_with_cnid(sb, dst_fd.search_key, cnid); entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name); if (unlikely(entry_size < 0)) { err = entry_size; goto out; } err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key); if (err != -ENOENT) { if (!err) err = -EEXIST; goto out; } err = hfs_brec_insert(&dst_fd, &entry, entry_size); hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY); hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY); out: hfs_bnode_put(dst_fd.bnode); hfs_find_exit(&src_fd); return err; }