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/*
Copyright (c) 2006-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _POSIX_AIO_H
#define _POSIX_AIO_H
#include "xlator.h"
#include "glusterfs.h"
// Maximum number of concurrently submitted IO events. The heaviest load
// GlusterFS has been able to handle had 60-80 concurrent calls
#define POSIX_AIO_MAX_NR_EVENTS 256
// Maximum number of completed IO operations to reap per getevents syscall
#define POSIX_AIO_MAX_NR_GETEVENTS 16
int posix_aio_on (xlator_t *this);
int posix_aio_off (xlator_t *this);
int posix_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
off_t offset, uint32_t flags, dict_t *xdata);
int posix_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
struct iovec *vector, int32_t count, off_t offset,
uint32_t flags, struct iobref *iobref, dict_t *xdata);
#endif /* !_POSIX_AIO_H */
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