[PATCH] knfsd: SUNRPC: Provide room in svc_rqst for larger addresses

Expand the rq_addr field to allow it to contain larger addresses.

Specifically, we replace a 'sockaddr_in' with a 'sockaddr_storage', then
everywhere the 'sockaddr_in' was referenced, we use instead an accessor
function (svc_addr_in) which safely casts the _storage to _in.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 3d4610c..22d4032 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -192,7 +192,7 @@
 nlmsvc_lookup_host(struct svc_rqst *rqstp,
 			const char *hostname, int hostname_len)
 {
-	return nlm_lookup_host(1, &rqstp->rq_addr,
+	return nlm_lookup_host(1, svc_addr_in(rqstp),
 			       rqstp->rq_prot, rqstp->rq_vers,
 			       hostname, hostname_len);
 }