1 files changed, 156 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/in_windows_exporter_metrics/we_wmi_paging_file.c b/src/fluent-bit/plugins/in_windows_exporter_metrics/we_wmi_paging_file.c
new file mode 100644
index 000000000..ed5853811
--- /dev/null
+++ b/src/fluent-bit/plugins/in_windows_exporter_metrics/we_wmi_paging_file.c
@@ -0,0 +1,156 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2022 The Fluent Bit Authors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include <fluent-bit/flb_input_plugin.h>
+#include <fluent-bit/flb_config.h>
+#include <fluent-bit/flb_config_map.h>
+#include <fluent-bit/flb_error.h>
+#include <fluent-bit/flb_pack.h>
+
+#include "we.h"
+#include "we_wmi.h"
+#include "we_wmi_paging_file.h"
+#include "we_util.h"
+#include "we_metric.h"
+
+static double nop_adjust(double value)
+{
+    return value;
+}
+
+int we_wmi_paging_file_init(struct flb_we *ctx)
+{
+    struct cmt_gauge *g;
+
+    ctx->wmi_paging_file = flb_calloc(1, sizeof(struct we_wmi_paging_file_counters));
+    if (!ctx->wmi_paging_file) {
+        flb_errno();
+        return -1;
+    }
+    ctx->wmi_paging_file->operational = FLB_FALSE;
+
+    g = cmt_gauge_create(ctx->cmt, "windows", "paging_file", "allocated_base_size_megabytes",
+                         "The value indicates the actual amount of disk space allocated "\
+                         "for use with this page file (AllocatedBaseSize)",
+                         0, NULL);
+
+    if (!g) {
+        return -1;
+    }
+    ctx->wmi_paging_file->allocated_base_size_megabytes = g;
+
+    g = cmt_gauge_create(ctx->cmt, "windows", "paging_file", "current_usage_megabytes",
+                         "The value indicates how much of the total reserved page file " \
+                         "is currently in use (CurrentUsage)",
+                         0, NULL);
+
+    if (!g) {
+        return -1;
+    }
+    ctx->wmi_paging_file->current_usage_megabytes = g;
+
+    g = cmt_gauge_create(ctx->cmt, "windows", "paging_file", "peak_usage_megabytes",
+                         "The value indicates the highest use page file (PeakUsage)",
+                         0, NULL);
+
+    if (!g) {
+        return -1;
+    }
+    ctx->wmi_paging_file->peak_usage_megabytes = g;
+
+    ctx->wmi_paging_file->info = flb_calloc(1, sizeof(struct wmi_query_spec));
+    if (!ctx->wmi_paging_file->info) {
+        flb_errno();
+        return -1;
+    }
+    ctx->wmi_paging_file->info->metric_instance = (void *)g;
+    ctx->wmi_paging_file->info->type = CMT_GAUGE;
+    ctx->wmi_paging_file->info->value_adjuster = nop_adjust;
+    ctx->wmi_paging_file->info->wmi_counter = "Win32_PageFileUsage";
+    ctx->wmi_paging_file->info->wmi_property = "";
+    ctx->wmi_paging_file->info->label_property_count = 0;
+    ctx->wmi_paging_file->info->label_property_keys = NULL;
+    ctx->wmi_paging_file->info->where_clause = NULL;
+
+    ctx->wmi_paging_file->operational = FLB_TRUE;
+
+    return 0;
+}
+
+int we_wmi_paging_file_exit(struct flb_we *ctx)
+{
+    ctx->wmi_paging_file->operational = FLB_FALSE;
+
+    flb_free(ctx->wmi_paging_file->info);
+    flb_free(ctx->wmi_paging_file);
+
+    return 0;
+}
+
+int we_wmi_paging_file_update(struct flb_we *ctx)
+{
+    uint64_t timestamp = 0;
+    IEnumWbemClassObject* enumerator = NULL;
+    HRESULT hr;
+
+    IWbemClassObject *class_obj = NULL;
+    ULONG ret = 0;
+    double val = 0;
+
+    if (!ctx->wmi_paging_file->operational) {
+        flb_plg_error(ctx->ins, "paging_file collector not yet in operational state");
+
+        return -1;
+    }
+
+    if (FAILED(we_wmi_coinitialize(ctx))) {
+        return -1;
+    }
+
+    timestamp = cfl_time_now();
+
+    if (FAILED(we_wmi_execute_query(ctx, ctx->wmi_paging_file->info, &enumerator))) {
+        return -1;
+    }
+
+    while(enumerator) {
+        hr = enumerator->lpVtbl->Next(enumerator, WBEM_INFINITE, 1, &class_obj, &ret);
+
+        if(ret == 0) {
+            break;
+        }
+
+        val = we_wmi_get_property_value(ctx, "AllocatedBaseSize", class_obj);
+        cmt_gauge_set(ctx->wmi_paging_file->allocated_base_size_megabytes, timestamp, val, 0, NULL);
+
+        val = we_wmi_get_property_value(ctx, "CurrentUsage", class_obj);
+        cmt_gauge_set(ctx->wmi_paging_file->current_usage_megabytes, timestamp, val, 0, NULL);
+
+        val = we_wmi_get_property_value(ctx, "PeakUsage", class_obj);
+        cmt_gauge_set(ctx->wmi_paging_file->peak_usage_megabytes, timestamp, val, 0, NULL);
+
+        class_obj->lpVtbl->Release(class_obj);
+    }
+
+    enumerator->lpVtbl->Release(enumerator);
+
+    we_wmi_cleanup(ctx);
+
+    return 0;
+}