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| | /* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright Red Hat
* Author: Laurent Vivier <lvivier@redhat.com>
*
* vhost-user common UDP and TCP functions
*/
#ifndef VU_COMMON_H
#define VU_COMMON_H
#include <linux/virtio_net.h>
#define IOV_PER_ELEM (2)
static inline void *vu_eth(void *base)
{
return ((char *)base + VNET_HLEN);
}
static inline void *vu_ip(void *base)
{
return (struct ethhdr *)vu_eth(base) + 1;
}
static inline void *vu_payloadv4(void *base)
{
return (struct iphdr *)vu_ip(base) + 1;
}
static inline void *vu_payloadv6(void *base)
{
return (struct ipv6hdr *)vu_ip(base) + 1;
}
/**
* vu_set_element() - Initialize a vu_virtq_element
* @elem: Element to initialize
* @out_num: Number of outgoing iovec buffers
* @out_sg: Out iovec entry to set in elem
* @in_num: Number of incoming iovec buffers
* @in_sg: In iovec entry to set in elem
*/
static inline void vu_set_element(struct vu_virtq_element *elem,
unsigned int out_num, struct iovec *out_sg,
unsigned int in_num, struct iovec *in_sg)
{
elem->out_num = out_num;
elem->out_sg = out_sg;
elem->in_num = in_num;
elem->in_sg = in_sg;
}
void vu_init_elem(struct vu_virtq_element *elem, struct iovec *iov,
int elem_cnt, int iov_per_elem);
int vu_collect(const struct vu_dev *vdev, struct vu_virtq *vq,
struct vu_virtq_element *elem, int max_elem, size_t size,
size_t *collected);
void vu_set_vnethdr(const struct vu_dev *vdev, struct iov_tail *data,
int num_buffers);
void vu_flush(const struct vu_dev *vdev, struct vu_virtq *vq,
struct vu_virtq_element *elem, int elem_cnt);
void vu_kick_cb(struct vu_dev *vdev, union epoll_ref ref,
const struct timespec *now);
int vu_send_single(const struct ctx *c, const void *buf, size_t size);
void vu_pad(struct iovec *iov, size_t l2len);
#endif /* VU_COMMON_H */
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