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Commit 7d21c0f9 authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
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SUNRPC: Set IPV6ONLY flag on PF_INET6 RPC listener sockets 



We are about to convert to using separate RPC listener sockets for
PF_INET and PF_INET6.  This echoes the way IPv6 is handled in user
space by TI-RPC, and eliminates the need for ULPs to worry about
mapped IPv4 AF_INET6 addresses when doing address comparisons.

Start by setting the IPV6ONLY flag on PF_INET6 RPC listener sockets.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 26298caa

net/sunrpc/svcsock.c

+4 −6
Original line number Diff line number Diff line
@@ -1144,13 +1144,11 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv, 
		svc_tcp_init(svsk, serv);



	/*

	 * We start one listener per sv_serv.  We want AF_INET

	 * requests to be automatically shunted to our PF_INET6

	 * listener using a mapped IPv4 address.  Make sure

	 * no-one starts an equivalent IPv4 listener, which

	 * would steal our incoming connections.

	 * If this is a PF_INET6 listener, we want to avoid

	 * getting requests from IPv4 remotes.  Those should

	 * be shunted to a PF_INET listener via rpcbind.

	 */

	val = 0;

	val = 1;

	if (inet->sk_family == PF_INET6)

		kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY,

					(char *)&val, sizeof(val));