/* SPDX-License-Identifier: GPL-2.0-or-later * Copyright Red Hat * Author: Laurent Vivier * * vhost-user common UDP and TCP functions */ #ifndef VU_COMMON_H #define VU_COMMON_H #include static inline void *vu_eth(void *base) { return ((char *)base + sizeof(struct virtio_net_hdr_mrg_rxbuf)); } 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_sg: One out iovec entry to set in elem * @in_sg: One in iovec entry to set in elem */ static inline void vu_set_element(struct vu_virtq_element *elem, struct iovec *out_sg, struct iovec *in_sg) { elem->out_num = !!out_sg; elem->out_sg = out_sg; elem->in_num = !!in_sg; elem->in_sg = in_sg; } void vu_init_elem(struct vu_virtq_element *elem, struct iovec *iov, int elem_cnt); int vu_collect(struct vu_dev *vdev, struct vu_virtq *vq, struct vu_virtq_element *elem, int max_elem, size_t size, size_t *frame_size); void vu_set_vnethdr(const struct vu_dev *vdev, struct virtio_net_hdr_mrg_rxbuf *vnethdr, 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); #endif /* VU_COMMON_H */