passt/tcp_buf.h

/* SPDX-License-Identifier: GPL-2.0-or-later
 * Copyright (c) 2021 Red Hat GmbH
 * Author: Stefano Brivio <sbrivio@redhat.com>
 */

#ifndef TCP_BUF_H
#define TCP_BUF_H

void tcp_sock4_iov_init(const struct ctx *c);
void tcp_sock6_iov_init(const struct ctx *c);
void tcp_flags_flush(const struct ctx *c);
void tcp_payload_flush(struct ctx *c);
int tcp_buf_data_from_sock(struct ctx *c, struct tcp_tap_conn *conn);
int tcp_buf_send_flag(struct ctx *c, struct tcp_tap_conn *conn, int flags);

#endif  /*TCP_BUF_H */
tcp: move buffers management functions to their own file Move all the TCP parts using internal buffers to tcp_buf.c and keep generic TCP management functions in tcp.c. Add tcp_internal.h to export needed functions from tcp.c and tcp_buf.h from tcp_buf.c With this change we can use existing TCP functions with a different kind of memory storage as for instance the shared memory provided by the guest via vhost-user. Signed-off-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com> 2024-06-13 12:36:49 +00:00			`/* SPDX-License-Identifier: GPL-2.0-or-later`
			`* Copyright (c) 2021 Red Hat GmbH`
			`* Author: Stefano Brivio <sbrivio@redhat.com>`
			`*/`

			`#ifndef TCP_BUF_H`
			`#define TCP_BUF_H`

			`void tcp_sock4_iov_init(const struct ctx *c);`
			`void tcp_sock6_iov_init(const struct ctx *c);`
			`void tcp_flags_flush(const struct ctx *c);`
tcp: Correctly update SO_PEEK_OFF when tcp_send_frames() drops frames When using the new SO_PEEK_OFF feature on TCP sockets, we must adjust the SO_PEEK_OFF value whenever we move conn->seq_to_tap backwards. Although it was discussed during development, somewhere during the shuffles the case where we move the pointer backwards because we lost frames while sending them to the guest. This can happen, for example, if the socket buffer on the Unix socket to qemu overflows. Fixing this is slightly complicated because we need to pass a non-const context pointer to some places we previously didn't need it. While we're there also fix a small stylistic issue in the function comment for tcp_revert_seq() - it was using spaces instead of tabs. Fixes: e63d281871ef ("tcp: leverage support of SO_PEEK_OFF socket option when available") Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> 2024-07-24 03:31:09 +00:00			`void tcp_payload_flush(struct ctx *c);`
tcp: move buffers management functions to their own file Move all the TCP parts using internal buffers to tcp_buf.c and keep generic TCP management functions in tcp.c. Add tcp_internal.h to export needed functions from tcp.c and tcp_buf.h from tcp_buf.c With this change we can use existing TCP functions with a different kind of memory storage as for instance the shared memory provided by the guest via vhost-user. Signed-off-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com> 2024-06-13 12:36:49 +00:00			`int tcp_buf_data_from_sock(struct ctx c, struct tcp_tap_conn conn);`
			`int tcp_buf_send_flag(struct ctx c, struct tcp_tap_conn conn, int flags);`

			`#endif /TCP_BUF_H /`