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linux-next/net/smc/smc_tx.h
Hans Wippel 69cb7dc021 net/smc: add common buffer size in send and receive buffer descriptors
In addition to the buffer references, SMC currently stores the sizes of
the receive and send buffers in each connection as separate variables.
This patch introduces a buffer length variable in the common buffer
descriptor and uses this length instead.

Signed-off-by: Hans Wippel <hwippel@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18 13:15:01 -04:00

38 lines
1008 B
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Shared Memory Communications over RDMA (SMC-R) and RoCE
*
* Manage send buffer
*
* Copyright IBM Corp. 2016
*
* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
*/
#ifndef SMC_TX_H
#define SMC_TX_H
#include <linux/socket.h>
#include <linux/types.h>
#include "smc.h"
#include "smc_cdc.h"
static inline int smc_tx_prepared_sends(struct smc_connection *conn)
{
union smc_host_cursor sent, prep;
smc_curs_write(&sent, smc_curs_read(&conn->tx_curs_sent, conn), conn);
smc_curs_write(&prep, smc_curs_read(&conn->tx_curs_prep, conn), conn);
return smc_curs_diff(conn->sndbuf_desc->len, &sent, &prep);
}
void smc_tx_work(struct work_struct *work);
void smc_tx_init(struct smc_sock *smc);
int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len);
int smc_tx_sndbuf_nonempty(struct smc_connection *conn);
void smc_tx_sndbuf_nonfull(struct smc_sock *smc);
void smc_tx_consumer_update(struct smc_connection *conn);
#endif /* SMC_TX_H */