lockd: refactor SM_MON my_id argument encoder

Clean up: introduce a new XDR encoder specifically for the my_id
argument of SM_MON requests.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 87bd4e4d65dd..06216d6715f7 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -183,6 +183,25 @@ static __be32 *xdr_encode_mon_name(__be32 *p, struct nsm_args *argp)
         return xdr_encode_nsm_string(p, name);
 }
 
+/*
+ * The "my_id" argument specifies the hostname and RPC procedure
+ * to be called when the status manager receives notification
+ * (via the SM_NOTIFY call) that the state of host "mon_name"
+ * has changed.
+ */
+static __be32 *xdr_encode_my_id(__be32 *p, struct nsm_args *argp)
+{
+        p = xdr_encode_nsm_string(p, utsname()->nodename);
+        if (!p)
+                return ERR_PTR(-EIO);
+
+        *p++ = htonl(argp->prog);
+        *p++ = htonl(argp->vers);
+        *p++ = htonl(argp->proc);
+
+        return p;
+}
+
 static __be32 *
 xdr_encode_common(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
 {