--- /dev/null
+/*
+ * 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, 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, 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,
+ 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;
+
+ 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_SEC;
+ 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, 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;
+
+ 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);
+ }
+
+ 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--;
+ }
+
+ 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_SEC;
+ 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, struct qstr *src_name,
+ struct inode *dst_dir, 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;
+
+ /* 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_SEC;
+
+ /* 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_SEC;
+
+ /* 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;
+}
Code Review / kvmfornfv.git / blobdiff