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Commit 9b67e26f authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

net/smc: handle ioctls SIOCINQ, SIOCOUTQ, and SIOCOUTQNSD 



SIOCINQ returns the amount of unread data in the RMB.
SIOCOUTQ returns the amount of unsent or unacked sent data in the send
buffer.
SIOCOUTQNSD returns the amount of data prepared for sending, but
not yet sent.

Signed-off-by: default avatarUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ed75986f

net/smc/af_smc.c

+30 −3
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <net/sock.h>

#include <net/tcp.h>

#include <net/smc.h>

#include <asm/ioctls.h>



#include "smc.h"

#include "smc_clc.h"
@@ -1389,12 +1390,38 @@ static int smc_ioctl(struct socket *sock, unsigned int cmd, 
		     unsigned long arg)

{

	struct smc_sock *smc;

	int answ;



	smc = smc_sk(sock->sk);

	if (smc->use_fallback)

	if (smc->use_fallback) {

		if (!smc->clcsock)

			return -EBADF;

		return smc->clcsock->ops->ioctl(smc->clcsock, cmd, arg);

	else

		return sock_no_ioctl(sock, cmd, arg);

	}

	switch (cmd) {

	case SIOCINQ: /* same as FIONREAD */

		if (smc->sk.sk_state == SMC_LISTEN)

			return -EINVAL;

		answ = atomic_read(&smc->conn.bytes_to_rcv);

		break;

	case SIOCOUTQ:

		/* output queue size (not send + not acked) */

		if (smc->sk.sk_state == SMC_LISTEN)

			return -EINVAL;

		answ = smc->conn.sndbuf_size -

					atomic_read(&smc->conn.sndbuf_space);

		break;

	case SIOCOUTQNSD:

		/* output queue size (not send only) */

		if (smc->sk.sk_state == SMC_LISTEN)

			return -EINVAL;

		answ = smc_tx_prepared_sends(&smc->conn);

		break;

	default:

		return -ENOIOCTLCMD;

	}



	return put_user(answ, (int __user *)arg);

}



static ssize_t smc_sendpage(struct socket *sock, struct page *page,