Implement File Descriptor Meter support for PCP

Signed-off-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>

3 files changed, 19 insertions, 0 deletions

diff --git a/pcp/PCPMetric.h b/pcp/PCPMetric.h
index c0966b38..e89a0a4c 100644
--- a/pcp/PCPMetric.h
+++ b/pcp/PCPMetric.h
@@ -93,6 +93,8 @@ typedef enum PCPMetric_ {
    PCP_ZRAM_CAPACITY,           /* zram.capacity */
    PCP_ZRAM_ORIGINAL,           /* zram.mm_stat.data_size.original */
    PCP_ZRAM_COMPRESSED,         /* zram.mm_stat.data_size.compressed */
+   PCP_VFS_FILES_COUNT,         /* vfs.files.count */
+   PCP_VFS_FILES_MAX,           /* vfs.files.max */
 
    PCP_PROC_PID,                /* proc.psinfo.pid */
    PCP_PROC_PPID,               /* proc.psinfo.ppid */
diff --git a/pcp/Platform.c b/pcp/Platform.c
index d9f75ebc..a76c0288 100644
--- a/pcp/Platform.c
+++ b/pcp/Platform.c
@@ -25,6 +25,7 @@ in the source distribution for its full text.
 #include "DiskIOMeter.h"
 #include "DynamicColumn.h"
 #include "DynamicMeter.h"
+#include "FileDescriptorMeter.h"
 #include "HostnameMeter.h"
 #include "LoadAverageMeter.h"
 #include "Macros.h"
@@ -115,6 +116,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &DiskIOMeter_class,
    &NetworkIOMeter_class,
    &SysArchMeter_class,
+   &FileDescriptorMeter_class,
    NULL
 };
 
@@ -192,6 +194,8 @@ static const char* Platform_metricNames[] = {
    [PCP_ZRAM_CAPACITY] = "zram.capacity",
    [PCP_ZRAM_ORIGINAL] = "zram.mm_stat.data_size.original",
    [PCP_ZRAM_COMPRESSED] = "zram.mm_stat.data_size.compressed",
+   [PCP_VFS_FILES_COUNT] = "vfs.files.count",
+   [PCP_VFS_FILES_MAX] = "vfs.files.max",
 
    [PCP_PROC_PID] = "proc.psinfo.pid",
    [PCP_PROC_PPID] = "proc.psinfo.ppid",
@@ -727,6 +731,17 @@ bool Platform_getNetworkIO(NetworkIOData* data) {
    return true;
 }
 
+void Platform_getFileDescriptors(double* used, double* max) {
+   *used = NAN;
+   *max = 65536;
+
+   pmAtomValue value;
+   if (PCPMetric_values(PCP_VFS_FILES_COUNT, &value, 1, PM_TYPE_32) != NULL)
+      *used = value.l;
+   if (PCPMetric_values(PCP_VFS_FILES_MAX, &value, 1, PM_TYPE_32) != NULL)
+      *max = value.l;
+}
+
 void Platform_getBattery(double* level, ACPresence* isOnAC) {
    *level = NAN;
    *isOnAC = AC_ERROR;
diff --git a/pcp/Platform.h b/pcp/Platform.h
index f06f2266..f90e2813 100644
--- a/pcp/Platform.h
+++ b/pcp/Platform.h
@@ -131,6 +131,8 @@ extern pmOptions opts;
 
 size_t Platform_addMetric(PCPMetric id, const char* name);
 
+void Platform_getFileDescriptors(double* used, double* max);
+
 void Platform_gettime_realtime(struct timeval* tv, uint64_t* msec);
 
 void Platform_gettime_monotonic(uint64_t* msec);