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: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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@ -1144,13 +1144,11 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
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svc_tcp_init(svsk, serv);
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/*
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* We start one listener per sv_serv. We want AF_INET
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* requests to be automatically shunted to our PF_INET6
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* listener using a mapped IPv4 address. Make sure
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* no-one starts an equivalent IPv4 listener, which
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* would steal our incoming connections.
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* If this is a PF_INET6 listener, we want to avoid
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* getting requests from IPv4 remotes. Those should
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* be shunted to a PF_INET listener via rpcbind.
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*/
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val = 0;
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val = 1;
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if (inet->sk_family == PF_INET6)
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kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY,
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(char *)&val, sizeof(val));
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