DiskIO (NetBSD): add support

Author: CarterLi

CMakeLists.txt

@@ -691,7 +691,7 @@ elseif(NetBSD)
         src/detection/dns/dns_linux.c
         src/detection/physicaldisk/physicaldisk_nosupport.c
         src/detection/physicalmemory/physicalmemory_nosupport.c
-        src/detection/diskio/diskio_nosupport.c
+        src/detection/diskio/diskio_nbsd.c
         src/detection/displayserver/linux/displayserver_linux.c
         src/detection/displayserver/linux/drm.c
         src/detection/displayserver/linux/wayland/wayland.c

src/detection/diskio/diskio_nbsd.c

@@ -0,0 +1,38 @@
+#include "diskio.h"
+#include "util/stringUtils.h"
+#include "util/mallocHelper.h"
+
+#include <sys/iostat.h>
+#include <sys/sysctl.h>
+
+const char* ffDiskIOGetIoCounters(FFlist* result, FFDiskIOOptions* options)
+{
+    int mib[] = {CTL_HW, HW_IOSTATS, sizeof(struct io_sysctl)};
+    size_t len;
+    if (sysctl(mib, ARRAY_SIZE(mib), NULL, &len, NULL, 0) < 0)
+        return "sysctl({HW_IOSTATS}, NULL) failed";
+    uint32_t nDrive = (uint32_t) (len / sizeof(struct io_sysctl));
+    
+    struct io_sysctl* stats = malloc(len);
+
+    if (sysctl(mib, ARRAY_SIZE(mib), stats, &len, NULL, 0) < 0)
+        return "sysctl({HW_IOSTATS}, stats) failed";
+    
+    for (uint32_t i = 0; i < nDrive; ++i)
+    {
+        struct io_sysctl* st = &stats[i];
+
+        if (options->namePrefix.length && strncmp(st->name, options->namePrefix.chars, options->namePrefix.length) != 0)
+            continue;
+
+        FFDiskIOResult* device = (FFDiskIOResult*) ffListAdd(result);
+        ffStrbufInitF(&device->devPath, "/dev/%s", st->name);
+        ffStrbufInitS(&device->name, st->name);
+        device->bytesRead = st->rbytes;
+        device->readCount = st->rxfer;
+        device->bytesWritten = st->wbytes;
+        device->writeCount = st->wxfer;
+    }
+
+    return NULL;
+}