/*
* XDR functions for NSM.
+ *
+ * See http://www.opengroup.org/ for details on the Network
+ * Status Monitor wire protocol.
*/
static __be32 *xdr_encode_nsm_string(__be32 *p, char *string)
return p;
}
-static __be32 *
-xdr_encode_common(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
+/*
+ * The "mon_id" argument specifies the non-private arguments
+ * of an SM_MON or SM_UNMON call.
+ */
+static __be32 *xdr_encode_mon_id(__be32 *p, struct nsm_args *argp)
{
- char buffer[20], *name;
-
- /*
- * Use the dotted-quad IP address of the remote host as
- * identifier. Linux statd always looks up the canonical
- * hostname first for whatever remote hostname it receives,
- * so this works alright.
- */
- if (nsm_use_hostnames) {
- name = argp->mon_name;
- } else {
- sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(argp->addr));
- name = buffer;
- }
- if (!(p = xdr_encode_string(p, name))
- || !(p = xdr_encode_string(p, utsname()->nodename)))
+ p = xdr_encode_mon_name(p, argp);
+ if (!p)
return ERR_PTR(-EIO);
- *p++ = htonl(argp->prog);
- *p++ = htonl(argp->vers);
- *p++ = htonl(argp->proc);
+
+ return xdr_encode_my_id(p, argp);
+}
+
+/*
+ * The "priv" argument may contain private information required
+ * by the SM_MON call. This information will be supplied in the
+ * SM_NOTIFY call.
+ *
+ * Linux provides the raw IP address of the monitored host,
+ * left in network byte order.
+ */
+static __be32 *xdr_encode_priv(__be32 *p, struct nsm_args *argp)
+{
+ *p++ = argp->addr;
+ *p++ = 0;
+ *p++ = 0;
+ *p++ = 0;
return p;
}
static int
xdr_encode_mon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
{
- p = xdr_encode_common(rqstp, p, argp);
+ p = xdr_encode_mon_id(p, argp);
+ if (IS_ERR(p))
+ return PTR_ERR(p);
+
+ p = xdr_encode_priv(p, argp);
if (IS_ERR(p))
return PTR_ERR(p);
- /* Surprise - there may even be room for an IPv6 address now */
- *p++ = argp->addr;
- *p++ = 0;
- *p++ = 0;
- *p++ = 0;
rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
return 0;
}
static int
xdr_encode_unmon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
{
- p = xdr_encode_common(rqstp, p, argp);
+ p = xdr_encode_mon_id(p, argp);
if (IS_ERR(p))
return PTR_ERR(p);
rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
}
#define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN))
-#define SM_my_id_sz (3+1+SM_my_name_sz)
-#define SM_mon_id_sz (1+XDR_QUADLEN(20)+SM_my_id_sz)
-#define SM_mon_sz (SM_mon_id_sz+4)
+#define SM_my_id_sz (SM_my_name_sz+3)
+#define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN))
+#define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz)
+#define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE))
+#define SM_mon_sz (SM_mon_id_sz+SM_priv_sz)
#define SM_monres_sz 2
#define SM_unmonres_sz 1