linux/net/rds/tcp_send.c

/*
 * Copyright (c) 2006, 2017 Oracle and/or its affiliates. All rights reserved.
 *
 * This software is available to you under a choice of one of two
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 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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#include <linux/kernel.h>
#include <linux/in.h>
#include <net/tcp.h>

#include "rds_single_path.h"
#include "rds.h"
#include "tcp.h"

void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp)
{ … }

void rds_tcp_xmit_path_complete(struct rds_conn_path *cp)
{ … }

/* the core send_sem serializes this with other xmit and shutdown */
static int rds_tcp_sendmsg(struct socket *sock, void *data, unsigned int len)
{ … }

/* the core send_sem serializes this with other xmit and shutdown */
int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
		 unsigned int hdr_off, unsigned int sg, unsigned int off)
{ … }

/*
 * rm->m_ack_seq is set to the tcp sequence number that corresponds to the
 * last byte of the message, including the header.  This means that the
 * entire message has been received if rm->m_ack_seq is "before" the next
 * unacked byte of the TCP sequence space.  We have to do very careful
 * wrapping 32bit comparisons here.
 */
static int rds_tcp_is_acked(struct rds_message *rm, uint64_t ack)
{ … }

void rds_tcp_write_space(struct sock *sk)
{ … }