int htree_inlinedir_to_tree(struct file *dir_file,
			    struct inode *dir, ext4_lblk_t block,
			    struct dx_hash_info *hinfo,
			    __u32 start_hash, __u32 start_minor_hash,
			    int *has_inline_data)
{
	int err = 0, count = 0;
	unsigned int parent_ino;
	int pos;
	struct ext4_dir_entry_2 *de;
	struct inode *inode = file_inode(dir_file);
	int ret, inline_size = 0;
	struct ext4_iloc iloc;
	void *dir_buf = NULL;
	struct ext4_dir_entry_2 fake;
	struct fscrypt_str tmp_str;

	ret = ext4_get_inode_loc(inode, &iloc);
	if (ret)
		return ret;

	down_read(&EXT4_I(inode)->xattr_sem);
	if (!ext4_has_inline_data(inode)) {
		up_read(&EXT4_I(inode)->xattr_sem);
		*has_inline_data = 0;
		goto out;
	}

	inline_size = ext4_get_inline_size(inode);
	dir_buf = kmalloc(inline_size, GFP_NOFS);
	if (!dir_buf) {
		ret = -ENOMEM;
		up_read(&EXT4_I(inode)->xattr_sem);
		goto out;
	}

	ret = ext4_read_inline_data(inode, dir_buf, inline_size, &iloc);
	up_read(&EXT4_I(inode)->xattr_sem);
	if (ret < 0)
		goto out;

	pos = 0;
	parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode);
	while (pos < inline_size) {
		/*
		 * As inlined dir doesn't store any information about '.' and
		 * only the inode number of '..' is stored, we have to handle
		 * them differently.
		 */
		if (pos == 0) {
			fake.inode = cpu_to_le32(inode->i_ino);
			fake.name_len = 1;
			strcpy(fake.name, ".");
			fake.rec_len = ext4_rec_len_to_disk(
						EXT4_DIR_REC_LEN(fake.name_len),
						inline_size);
			ext4_set_de_type(inode->i_sb, &fake, S_IFDIR);
			de = &fake;
			pos = EXT4_INLINE_DOTDOT_OFFSET;
		} else if (pos == EXT4_INLINE_DOTDOT_OFFSET) {
			fake.inode = cpu_to_le32(parent_ino);
			fake.name_len = 2;
			strcpy(fake.name, "..");
			fake.rec_len = ext4_rec_len_to_disk(
						EXT4_DIR_REC_LEN(fake.name_len),
						inline_size);
			ext4_set_de_type(inode->i_sb, &fake, S_IFDIR);
			de = &fake;
			pos = EXT4_INLINE_DOTDOT_SIZE;
		} else {
			de = (struct ext4_dir_entry_2 *)(dir_buf + pos);
			pos += ext4_rec_len_from_disk(de->rec_len, inline_size);
			if (ext4_check_dir_entry(inode, dir_file, de,
					 iloc.bh, dir_buf,
					 inline_size, pos)) {
				ret = count;
				goto out;
			}
		}

		ext4fs_dirhash(de->name, de->name_len, hinfo);
		if ((hinfo->hash < start_hash) ||
		    ((hinfo->hash == start_hash) &&
		     (hinfo->minor_hash < start_minor_hash)))
			continue;
		if (de->inode == 0)
			continue;
		tmp_str.name = de->name;
		tmp_str.len = de->name_len;
		err = ext4_htree_store_dirent(dir_file, hinfo->hash,
					      hinfo->minor_hash, de, &tmp_str);
		if (err) {
			count = err;
			goto out;
		}
		count++;
	}
	ret = count;
out:
	kfree(dir_buf);
	brelse(iloc.bh);
	return ret;
}
Unknown