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SUNRPC: Set IPV6ONLY flag on PF_INET6 RPC listener sockets

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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: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2009-03-18 20:46:44 -04:00 committed by Trond Myklebust
parent 26298caaca
commit 7d21c0f984
1 changed files with 4 additions and 6 deletions
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10
net/sunrpc/svcsock.c
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@ -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));