lockd: Enable NLM use of AF_INET6

If the kernel is configured to support IPv6 and the RPC server can register
services via rpcbindv4, we are all set to enable IPv6 support for lockd.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aime Le Rouzic <aime.le-rouzic@bull.net>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 12 insertions, 1 deletions

diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 7ac7d72e3b5f..3e5f9f079110 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -53,6 +53,17 @@ static struct svc_rqst		*nlmsvc_rqst;
 unsigned long                   nlmsvc_timeout;
 
 /*
+ * If the kernel has IPv6 support available, always listen for
+ * both AF_INET and AF_INET6 requests.
+ */
+#if (defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) && \
+        defined(CONFIG_SUNRPC_REGISTER_V4)
+static const sa_family_t        nlmsvc_family = AF_INET6;
+#else   /* (CONFIG_IPV6 || CONFIG_IPV6_MODULE) && CONFIG_SUNRPC_REGISTER_V4 */
+static const sa_family_t        nlmsvc_family = AF_INET;
+#endif  /* (CONFIG_IPV6 || CONFIG_IPV6_MODULE) && CONFIG_SUNRPC_REGISTER_V4 */
+
+/*
  * These can be set at insmod time (useful for NFS as root filesystem),
  * and also changed through the sysctl interface.  -- Jamie Lokier, Aug 2003
  */
@@ -256,7 +267,7 @@ int lockd_up(void)
                         "lockd_up: no pid, %d users??\n", nlmsvc_users);
 
         error = -ENOMEM;
-        serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, AF_INET, NULL);
+        serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, nlmsvc_family, NULL);
         if (!serv) {
                 printk(KERN_WARNING "lockd_up: create service failed\n");
                 goto out;