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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright Red Hat
* Author: Laurent Vivier <lvivier@redhat.com>
*/
#ifndef EPOLL_CTL_H
#define EPOLL_CTL_H
#include <sys/epoll.h>
#include "util.h"
#include "passt.h"
#include "epoll_type.h"
#include "flow.h"
#include "tcp.h"
#include "udp.h"
/**
* union epoll_ref - Breakdown of reference for epoll fd bookkeeping
* @u64: Opaque reference for epoll_ctl() and epoll_wait()
* @type: Type of fd (tells us what to do with events)
* @fd: File descriptor number (implies < 2^24 total descriptors)
* @flow: Index of the flow this fd is linked to
* @flowside: Index and side of a flow this fd is linked to
* @listen: Information for listening sockets
* @data: Data handled by protocol handlers
* @nsdir_fd: netns dirfd for fallback timer checking if namespace is gone
* @queue: vhost-user queue index for this fd
*/
union epoll_ref {
uint64_t u64;
struct {
enum epoll_type type:8;
int32_t fd:FD_REF_BITS;
union {
uint32_t flow;
flow_sidx_t flowside;
struct fwd_listen_ref listen;
uint32_t data;
int nsdir_fd;
int queue;
};
};
};
static_assert(sizeof(union epoll_ref) <= sizeof(union epoll_data),
"epoll_ref must have same size as epoll_data");
int epoll_add(int epollfd, uint32_t events, union epoll_ref ref);
void epoll_del(int epollfd, int fd);
#endif /* EPOLL_CTL_H */
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