virNodeGetCPUMap: Implement wire protocol.

- Defined the wire protocol format for virNodeGetCPUMap and its
  arguments
- Implemented remote method invocation (remoteNodeGetCPUMap)
- Implemented method dispatcher (remoteDispatchNodeGetCPUMap)

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Signed-off-by: Eric Blake <eblake@redhat.com>

daemon/remote.c

@@ -4569,6 +4569,53 @@ cleanup:
     return rv;
 }
 
+static int
+remoteDispatchNodeGetCPUMap(virNetServerPtr server ATTRIBUTE_UNUSED,
+                            virNetServerClientPtr client ATTRIBUTE_UNUSED,
+                            virNetMessagePtr msg ATTRIBUTE_UNUSED,
+                            virNetMessageErrorPtr rerr,
+                            remote_node_get_cpu_map_args *args,
+                            remote_node_get_cpu_map_ret *ret)
+{
+    unsigned char *cpumap = NULL;
+    unsigned int online;
+    unsigned int flags;
+    int cpunum;
+    int rv = -1;
+    struct daemonClientPrivate *priv =
+        virNetServerClientGetPrivateData(client);
+
+    if (!priv->conn) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("connection not open"));
+        goto cleanup;
+    }
+
+    flags = args->flags;
+
+    cpunum = virNodeGetCPUMap(priv->conn, args->need_results ? &cpumap : NULL,
+                              &online, flags);
+    if (cpunum < 0)
+        goto cleanup;
+
+    /* 'serialize' return cpumap */
+    if (args->need_results) {
+        ret->cpumap.cpumap_len = VIR_CPU_MAPLEN(cpunum);
+        ret->cpumap.cpumap_val = (char *) cpumap;
+        cpumap = NULL;
+    }
+
+    ret->online = online;
+    ret->ret = cpunum;
+
+    rv = 0;
+
+cleanup:
+    if (rv < 0)
+        virNetMessageSaveError(rerr);
+    VIR_FREE(cpumap);
+    return rv;
+}
+
 /*----- Helpers. -----*/
 
 /* get_nonnull_domain and get_nonnull_network turn an on-wire

src/remote/remote_driver.c

@@ -5780,6 +5780,53 @@ done:
     return rv;
 }
 
+static int
+remoteNodeGetCPUMap(virConnectPtr conn,
+                    unsigned char **cpumap,
+                    unsigned int *online,
+                    unsigned int flags)
+{
+    int rv = -1;
+    remote_node_get_cpu_map_args args;
+    remote_node_get_cpu_map_ret ret;
+    struct private_data *priv = conn->privateData;
+
+    remoteDriverLock(priv);
+
+    args.need_results = !!cpumap;
+    args.flags = flags;
+
+    memset (&ret, 0, sizeof(ret));
+    if (call(conn, priv, 0, REMOTE_PROC_NODE_GET_CPU_MAP,
+             (xdrproc_t) xdr_remote_node_get_cpu_map_args,
+             (char *) &args,
+             (xdrproc_t) xdr_remote_node_get_cpu_map_ret,
+             (char *) &ret) == -1)
+        goto done;
+
+    if (ret.ret < 0)
+        goto cleanup;
+
+    if (cpumap) {
+        if (VIR_ALLOC_N(*cpumap, ret.cpumap.cpumap_len) < 0) {
+            virReportOOMError();
+            goto cleanup;
+        }
+        memcpy(*cpumap, ret.cpumap.cpumap_val, ret.cpumap.cpumap_len);
+    }
+
+    if (online)
+        *online = ret.online;
+
+    rv = ret.ret;
+
+cleanup:
+    xdr_free((xdrproc_t) xdr_remote_node_get_cpu_map_ret, (char *) &ret);
+done:
+    remoteDriverUnlock(priv);
+    return rv;
+}
+
 static void
 remoteDomainEventQueue(struct private_data *priv, virDomainEventPtr event)
 {
@@ -6094,6 +6141,7 @@ static virDriver remote_driver = {
     .domainGetHostname = remoteDomainGetHostname, /* 0.10.0 */
     .nodeSetMemoryParameters = remoteNodeSetMemoryParameters, /* 0.10.2 */
     .nodeGetMemoryParameters = remoteNodeGetMemoryParameters, /* 0.10.2 */
+    .nodeGetCPUMap = remoteNodeGetCPUMap, /* 1.0.0 */
 };
 
 static virNetworkDriver network_driver = {

src/remote/remote_protocol.x

@@ -2670,6 +2670,17 @@ struct remote_node_get_memory_parameters_ret {
     int nparams;
 };
 
+struct remote_node_get_cpu_map_args {
+    int need_results;
+    unsigned int flags;
+};
+
+struct remote_node_get_cpu_map_ret {
+    opaque cpumap<REMOTE_CPUMAP_MAX>;
+    unsigned int online;
+    int ret;
+};
+
 /*----- Protocol. -----*/
 
 /* Define the program number, protocol version and procedure numbers here. */
@@ -3013,7 +3024,8 @@ enum remote_procedure {
     REMOTE_PROC_DOMAIN_BLOCK_COMMIT = 290, /* autogen autogen */
 
     REMOTE_PROC_NETWORK_UPDATE = 291, /* autogen autogen priority:high */
-    REMOTE_PROC_DOMAIN_EVENT_PMSUSPEND_DISK = 292 /* autogen autogen */
+    REMOTE_PROC_DOMAIN_EVENT_PMSUSPEND_DISK = 292, /* autogen autogen */
+    REMOTE_PROC_NODE_GET_CPU_MAP = 293 /* skipgen skipgen */
 
     /*
      * Notice how the entries are grouped in sets of 10 ?

src/remote_protocol-structs

@@ -2126,6 +2126,18 @@ struct remote_node_get_memory_parameters_ret {
         } params;
         int                        nparams;
 };
+struct remote_node_get_cpu_map_args {
+        int                        need_results;
+        u_int                      flags;
+};
+struct remote_node_get_cpu_map_ret {
+        struct {
+                u_int              cpumap_len;
+                char *             cpumap_val;
+        } cpumap;
+        u_int                      online;
+        int                        ret;
+};
 enum remote_procedure {
         REMOTE_PROC_OPEN = 1,
         REMOTE_PROC_CLOSE = 2,
@@ -2419,4 +2431,5 @@ enum remote_procedure {
         REMOTE_PROC_DOMAIN_BLOCK_COMMIT = 290,
         REMOTE_PROC_NETWORK_UPDATE = 291,
         REMOTE_PROC_DOMAIN_EVENT_PMSUSPEND_DISK = 292,
+        REMOTE_PROC_NODE_GET_CPU_MAP = 293,
 };