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[libvirt] [PATCH 4/6] virNodeGetMemoryStats: Implement remote protocol



virNodeGetMemoryStats: Implement remote protocol

Signed-off-by: Minoru Usui <usui mxm nes nec co jp>
---
 daemon/remote.c              |   76 ++++++++++++++++++++++++++++++++++++++++++
 src/remote/remote_driver.c   |   63 ++++++++++++++++++++++++++++++++++
 src/remote/remote_protocol.x |   21 +++++++++++-
 3 files changed, 159 insertions(+), 1 deletions(-)

diff --git a/daemon/remote.c b/daemon/remote.c
index 80783b3..190e213 100644
--- a/daemon/remote.c
+++ b/daemon/remote.c
@@ -1788,6 +1788,82 @@ cleanup:
     return rv;
 }
 
+static int
+remoteDispatchNodeGetMemoryStats (struct qemud_server *server ATTRIBUTE_UNUSED,
+                                  struct qemud_client *client ATTRIBUTE_UNUSED,
+                                  virConnectPtr conn,
+                                  remote_message_header *hdr ATTRIBUTE_UNUSED,
+                                  remote_error *rerr,
+                                  remote_node_get_memory_stats_args *args,
+                                  remote_node_get_memory_stats_ret *ret)
+{
+    virMemoryStatsPtr params = NULL;
+    int i;
+    int nparams = args->nparams;
+    unsigned int flags;
+    int rv = -1;
+
+    if (!conn) {
+        virNetError(VIR_ERR_INTERNAL_ERROR, "%s", _("connection not open"));
+        goto cleanup;
+    }
+
+    flags = args->flags;
+
+    if (nparams > REMOTE_NODE_MEMORY_STATS_MAX) {
+        virNetError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large"));
+        goto cleanup;
+    }
+    if (VIR_ALLOC_N(params, nparams) < 0) {
+        virReportOOMError();
+        goto cleanup;
+    }
+
+    if (virNodeGetMemoryStats(conn, params, &nparams, flags) < 0)
+        goto cleanup;
+
+    /* In this case, we need to send back the number of parameters
+     * supported
+     */
+    if (args->nparams == 0) {
+        ret->nparams = nparams;
+        goto success;
+    }
+
+    /* Serialise the memory parameters. */
+    ret->params.params_len = nparams;
+    if (VIR_ALLOC_N(ret->params.params_val, nparams) < 0)
+        goto no_memory;
+
+    for (i = 0; i < nparams; ++i) {
+        /* remoteDispatchClientRequest will free this: */
+        ret->params.params_val[i].field = strdup(params[i].field);
+        if (ret->params.params_val[i].field == NULL)
+            goto no_memory;
+
+        ret->params.params_val[i].value = params[i].value;
+    }
+
+success:
+    rv = 0;
+
+cleanup:
+    if (rv < 0) {
+        remoteDispatchError(rerr);
+        if (ret->params.params_val) {
+            for (i = 0; i < nparams; i++)
+                VIR_FREE(ret->params.params_val[i].field);
+            VIR_FREE(ret->params.params_val);
+        }
+    }
+    VIR_FREE(params);
+    return rv;
+
+no_memory:
+    virReportOOMError();
+    goto cleanup;
+}
+
 /*-------------------------------------------------------------*/
 
 static int
diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index 1691dab..475fd74 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -1694,6 +1694,68 @@ done:
 }
 
 static int
+remoteNodeGetMemoryStats (virConnectPtr conn,
+                          virMemoryStatsPtr params, int *nparams,
+                          unsigned int flags)
+{
+    int rv = -1;
+    remote_node_get_memory_stats_args args;
+    remote_node_get_memory_stats_ret ret;
+    int i = -1;
+    struct private_data *priv = conn->privateData;
+
+    remoteDriverLock(priv);
+
+    args.nparams = *nparams;
+    args.flags = flags;
+
+    memset (&ret, 0, sizeof ret);
+    if (call (conn, priv, 0, REMOTE_PROC_NODE_GET_MEMORY_STATS,
+              (xdrproc_t) xdr_remote_node_get_memory_stats_args, (char *) &args,
+              (xdrproc_t) xdr_remote_node_get_memory_stats_ret, (char *) &ret) == -1)
+        goto done;
+
+    /* Check the length of the returned list carefully. */
+    if (ret.params.params_len > REMOTE_NODE_MEMORY_STATS_MAX ||
+        ret.params.params_len > *nparams) {
+        remoteError(VIR_ERR_RPC, "%s",
+                    _("remoteNodeGetMemoryStats: "
+                      "returned number of stats exceeds limit"));
+        goto cleanup;
+    }
+    /* Handle the case when the caller does not know the number of stats
+     * and is asking for the number of stats supported
+     */
+    if (*nparams == 0) {
+        *nparams = ret.nparams;
+        rv = 0;
+        goto cleanup;
+    }
+
+    *nparams = ret.params.params_len;
+
+    /* Deserialise the result. */
+    for (i = 0; i < *nparams; ++i) {
+        if (virStrcpyStatic(params[i].field, ret.params.params_val[i].field) == NULL) {
+            remoteError(VIR_ERR_INTERNAL_ERROR,
+                        _("Stats %s too big for destination"),
+                        ret.params.params_val[i].field);
+            goto cleanup;
+        }
+        params[i].value = ret.params.params_val[i].value;
+    }
+
+    rv = 0;
+
+cleanup:
+    xdr_free ((xdrproc_t) xdr_remote_node_get_memory_stats_ret,
+              (char *) &ret);
+done:
+    remoteDriverUnlock(priv);
+    return rv;
+}
+
+static int
 remoteNodeGetCellsFreeMemory(virConnectPtr conn,
                             unsigned long long *freeMems,
                             int startCell,
@@ -6823,6 +6885,7 @@ static virDriver remote_driver = {
     .domainBlockPeek = remoteDomainBlockPeek, /* 0.4.2 */
     .domainMemoryPeek = remoteDomainMemoryPeek, /* 0.4.2 */
     .domainGetBlockInfo = remoteDomainGetBlockInfo, /* 0.8.1 */
+    .nodeGetMemoryStats = remoteNodeGetMemoryStats, /* 0.9.2 */
     .nodeGetCellsFreeMemory = remoteNodeGetCellsFreeMemory, /* 0.3.3 */
     .nodeGetFreeMemory = remoteNodeGetFreeMemory, /* 0.3.3 */
     .domainEventRegister = remoteDomainEventRegister, /* 0.5.0 */
diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x
index f0da95d..be8ee75 100644
--- a/src/remote/remote_protocol.x
+++ b/src/remote/remote_protocol.x
@@ -134,6 +134,9 @@ const REMOTE_DOMAIN_BLKIO_PARAMETERS_MAX = 16;
 /* Upper limit on list of memory parameters. */
 const REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX = 16;
 
+/* Upper limit on list of node memory stats. */
+const REMOTE_NODE_MEMORY_STATS_MAX = 16;
+
 /* Upper limit on number of NUMA cells */
 const REMOTE_NODE_MAX_CELLS = 1024;
 
@@ -359,6 +362,11 @@ struct remote_memory_param {
     remote_memory_param_value value;
 };
 
+struct remote_node_get_memory_stats {
+    remote_nonnull_string field;
+    unsigned hyper value;
+};
+
 /*----- Calls. -----*/
 
 /* For each call we may have a 'remote_CALL_args' and 'remote_CALL_ret'
@@ -440,6 +448,16 @@ struct remote_get_capabilities_ret {
     remote_nonnull_string capabilities;
 };
 
+struct remote_node_get_memory_stats_args {
+    int nparams;
+    unsigned int flags;
+};
+
+struct remote_node_get_memory_stats_ret {
+    remote_node_get_memory_stats params<REMOTE_NODE_MEMORY_STATS_MAX>;
+    int nparams;
+};
+
 struct remote_node_get_cells_free_memory_args {
     int startCell;
     int maxCells;
@@ -2291,7 +2309,8 @@ enum remote_procedure {
     REMOTE_PROC_DOMAIN_MIGRATE_PERFORM3 = 216, /* skipgen skipgen */
     REMOTE_PROC_DOMAIN_MIGRATE_FINISH3 = 217, /* skipgen skipgen */
     REMOTE_PROC_DOMAIN_MIGRATE_CONFIRM3 = 218, /* skipgen skipgen */
-    REMOTE_PROC_DOMAIN_SET_SCHEDULER_PARAMETERS_FLAGS = 219 /* skipgen skipgen */
+    REMOTE_PROC_DOMAIN_SET_SCHEDULER_PARAMETERS_FLAGS = 219, /* skipgen skipgen */
+    REMOTE_PROC_NODE_GET_MEMORY_STATS = 220 /* skipgen skipgen */
 
     /*
      * Notice how the entries are grouped in sets of 10 ?
-- 
1.7.1


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