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31d70024be
Set the file descriptor to use to transfer the backend device state during migration. Signed-off-by: Laurent Vivier <lvivier@redhat.com> [sbrivio: Fixed nits and coding style here and there] Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright Red Hat
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* Author: Laurent Vivier <lvivier@redhat.com>
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*
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* vhost-user common UDP and TCP functions
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*/
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#ifndef VU_COMMON_H
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#define VU_COMMON_H
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#include <linux/virtio_net.h>
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static inline void *vu_eth(void *base)
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{
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return ((char *)base + sizeof(struct virtio_net_hdr_mrg_rxbuf));
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}
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static inline void *vu_ip(void *base)
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{
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return (struct ethhdr *)vu_eth(base) + 1;
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}
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static inline void *vu_payloadv4(void *base)
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{
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return (struct iphdr *)vu_ip(base) + 1;
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}
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static inline void *vu_payloadv6(void *base)
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{
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return (struct ipv6hdr *)vu_ip(base) + 1;
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}
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/**
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* vu_set_element() - Initialize a vu_virtq_element
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* @elem: Element to initialize
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* @out_sg: One out iovec entry to set in elem
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* @in_sg: One in iovec entry to set in elem
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*/
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static inline void vu_set_element(struct vu_virtq_element *elem,
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struct iovec *out_sg, struct iovec *in_sg)
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{
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elem->out_num = !!out_sg;
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elem->out_sg = out_sg;
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elem->in_num = !!in_sg;
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elem->in_sg = in_sg;
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}
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void vu_init_elem(struct vu_virtq_element *elem, struct iovec *iov,
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int elem_cnt);
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int vu_collect(const struct vu_dev *vdev, struct vu_virtq *vq,
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struct vu_virtq_element *elem, int max_elem, size_t size,
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size_t *frame_size);
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void vu_set_vnethdr(const struct vu_dev *vdev,
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struct virtio_net_hdr_mrg_rxbuf *vnethdr,
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int num_buffers);
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void vu_flush(const struct vu_dev *vdev, struct vu_virtq *vq,
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struct vu_virtq_element *elem, int elem_cnt);
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void vu_kick_cb(struct vu_dev *vdev, union epoll_ref ref,
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const struct timespec *now);
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int vu_send_single(const struct ctx *c, const void *buf, size_t size);
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void vu_migrate(struct vu_dev *vdev, uint32_t events);
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#endif /* VU_COMMON_H */
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