[PATCH 2/2] supress socket error when address family is not supported

[Neil Brown <neilb@suse.de>]

From: Suresh Jayaraman <sjayaraman@suse.de>

It was observed that when ipv6 module was not loaded and cannot be auto-loaded,
when starting NFS server, the following error occurs:
	"rpc.nfsd: unable to create inet6 TCP socket: errno 97 (Address
	family not supported by protocol)"

This is obviously a true message, but does not represent an "error" when ipv6
is not enabled.  Rather, it is an expected condition.  As such, it can be
confusing / misleading / distracting to display it in this scenario.

This patch instead of throwing error when a socket call fails with
EAFNOSUPPORT, makes it as a NOTICE.

Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Neil Brown <neilb@suse.de>
---

 utils/nfsd/nfssvc.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/utils/nfsd/nfssvc.c b/utils/nfsd/nfssvc.c
index ea36399..f607214 100644
--- a/utils/nfsd/nfssvc.c
+++ b/utils/nfsd/nfssvc.c
@@ -174,8 +174,13 @@ nfssvc_setfds(const struct addrinfo *hints, const char *node, const char *port)
 		sockfd = socket(addr->ai_family, addr->ai_socktype,
 				addr->ai_protocol);
 		if (sockfd < 0) {
-			xlog(L_ERROR, "unable to create %s %s socket: "
-				"errno %d (%m)", family, proto, errno);
+			if (errno == EAFNOSUPPORT)
+				xlog(L_NOTICE, "address family %s not "
+						"supported by protocol %s",
+						family, proto);
+			else
+				xlog(L_ERROR, "unable to create %s %s socket: "
+				     "errno %d (%m)", family, proto, errno);
 			rc = errno;
 			goto error;
 		}