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Commit 8ba38460 authored by Sowmini Varadhan's avatar Sowmini Varadhan Committed by David S. Miller
Browse files

net/rds Add getsockopt support for SO_RDS_TRANSPORT 



The currently attached transport for a PF_RDS socket may be obtained
from user space by invoking getsockopt(2) using the SO_RDS_TRANSPORT
option at the SOL_RDS level. The integer optval returned will be one
of the RDS_TRANS_* constants defined in linux/rds.h.

Signed-off-by: default avatarSowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d97dac54

net/rds/af_rds.c

+14 −0
Original line number Diff line number Diff line
@@ -339,6 +339,7 @@ static int rds_getsockopt(struct socket *sock, int level, int optname, 
{

	struct rds_sock *rs = rds_sk_to_rs(sock->sk);

	int ret = -ENOPROTOOPT, len;

	int trans;



	if (level != SOL_RDS)

		goto out;
@@ -364,6 +365,19 @@ static int rds_getsockopt(struct socket *sock, int level, int optname, 
		else

			ret = 0;

		break;

	case SO_RDS_TRANSPORT:

		if (len < sizeof(int)) {

			ret = -EINVAL;

			break;

		}

		trans = (rs->rs_transport ? rs->rs_transport->t_type :

			 RDS_TRANS_NONE); /* unbound */

		if (put_user(trans, (int __user *)optval) ||

		    put_user(sizeof(int), optlen))

			ret = -EFAULT;

		else

			ret = 0;

		break;

	default:

		break;

	}