sortix--sortix/kernel/partition.h

/*
 * Copyright (c) 2013, 2015 Jonas 'Sortie' Termansen.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * partition.h
 * Block device representing a partition of another block device.
 */

#ifndef PARTITION_H
#define PARTITION_H

#include <sortix/kernel/refcount.h>
#include <sortix/kernel/inode.h>

namespace Sortix {

class Partition : public AbstractInode
{
public:
	Partition(Ref<Inode> inner_inode, off_t start, off_t length);
	virtual ~Partition();

private:
	Ref<Inode> inner_inode;
	off_t start;
	off_t length;

public:
	virtual int sync(ioctx_t* ctx);
	virtual int truncate(ioctx_t* ctx, off_t length);
	virtual off_t lseek(ioctx_t* ctx, off_t offset, int whence);
	virtual ssize_t pread(ioctx_t* ctx, uint8_t* buf, size_t count, off_t off);
	virtual ssize_t pwrite(ioctx_t* ctx, const uint8_t* buf, size_t count,
	                       off_t off);
	virtual int stat(ioctx_t* ctx, struct stat* st);

};

} // namespace Sortix

#endif