From: Florian Forster <octo@leeloo.lan.home.verplant.org>
Date: Mon, 16 Feb 2009 10:42:28 +0000 (+0100)
Subject: swap plugin: Added support for OpenBSD and possibly other *BSDs.
X-Git-Tag: collectd-4.6.0~22
X-Git-Url: https://git.octo.it/?a=commitdiff_plain;h=b10e5d81780306200ecadaf86605cef5ad8c9a04;hp=5dc37ca34bcb0742e8173f0c24ebdf59d2c6dc4d;p=collectd.git

swap plugin: Added support for OpenBSD and possibly other *BSDs.
---

diff --git a/ChangeLog b/ChangeLog
index 01f44cba..2076d207 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -62,6 +62,8 @@
 	  RRD accelerator daemon, rrdcached. This daemon works very similar to
 	  the original rrdtool plugin of collectd, but adds some more nice
 	  features.
+	* swap plugin: Code for OpenBSD (and possibly other *BSDs) has been
+	  added.
 
 2009-01-02, Version 4.5.2
 	* build system: Check for `mysql.h' and `mysql/mysql.h', since the
diff --git a/configure.in b/configure.in
index 80e7e405..bd8ca1dd 100644
--- a/configure.in
+++ b/configure.in
@@ -491,6 +491,7 @@ AC_CHECK_FUNCS(getifaddrs, [have_getifaddrs="yes"], [have_getifaddrs="no"])
 AC_CHECK_FUNCS(syslog, [have_syslog="yes"], [have_syslog="no"])
 AC_CHECK_FUNCS(getutent, [have_getutent="yes"], [have_getutent="no"])
 AC_CHECK_FUNCS(getutxent, [have_getutxent="yes"], [have_getutxent="no"])
+AC_CHECK_FUNCS(swapctl, [have_swapctl="yes"], [have_swapctl="no"])
 
 # For load module
 AC_CHECK_FUNCS(getloadavg, [have_getloadavg="yes"], [have_getloadavg="no"])
@@ -3023,6 +3024,11 @@ then
 	plugin_swap="yes"
 fi
 
+if test "x$have_swapctl" = "xyes"
+then
+	plugin_swap="yes"
+fi
+
 if test "x$with_kvm_openfiles$with_kvm_nlist" = "xyesyes"
 then
 	plugin_tcpconns="yes"
diff --git a/src/swap.c b/src/swap.c
index b8b5f098..425742e9 100644
--- a/src/swap.c
+++ b/src/swap.c
@@ -1,6 +1,6 @@
 /**
  * collectd - src/swap.c
- * Copyright (C) 2005-2007  Florian octo Forster
+ * Copyright (C) 2005-2009  Florian octo Forster
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -32,6 +32,9 @@
 #if HAVE_SYS_SYSCTL_H
 #  include <sys/sysctl.h>
 #endif
+#if HAVE_SYS_DKSTAT_H
+#  include <sys/dkstat.h>
+#endif
 #if HAVE_KVM_H
 #  include <kvm.h>
 #endif
@@ -52,6 +55,10 @@ static unsigned long long pagesize;
 static kstat_t *ksp;
 /* #endif HAVE_LIBKSTAT */
 
+#elif HAVE_SWAPCTL
+/* No global variables */
+/* #endif HAVE_SWAPCTL */
+
 #elif defined(VM_SWAPUSAGE)
 /* No global variables */
 /* #endif defined(VM_SWAPUSAGE) */
@@ -82,6 +89,10 @@ static int swap_init (void)
 		ksp = NULL;
 /* #endif HAVE_LIBKSTAT */
 
+#elif HAVE_SWAPCTL
+	/* No init stuff */
+/* #endif HAVE_SWAPCTL */
+
 #elif defined(VM_SWAPUSAGE)
 	/* No init stuff */
 /* #endif defined(VM_SWAPUSAGE) */
@@ -239,6 +250,74 @@ static int swap_read (void)
 	swap_submit ("reserved", swap_resv);
 /* #endif HAVE_LIBKSTAT */
 
+#elif HAVE_SWAPCTL
+	struct swapent *swap_entries;
+	int swap_num;
+	int status;
+	int i;
+
+	uint64_t used  = 0;
+	uint64_t total = 0;
+
+	/*
+	 * XXX: This is the syntax for the *BSD `swapctl', which has the
+	 * following prototype:
+	 *   swapctl (int cmd, void *arg, int misc);
+	 *
+	 * HP-UX and Solaris (and possibly other UNIXes) provide `swapctl',
+	 * too, but with the following prototype:
+	 *   swapctl (int cmd, void *arg);
+	 *
+	 * Solaris is usually handled in the KSTAT case above. For other UNIXes
+	 * a separate case for the other version of `swapctl' may be necessary.
+	 */
+	swap_num = swapctl (SWAP_NSWAP, NULL, 0);
+	if (swap_num < 0)
+	{
+		ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
+				swap_num);
+		return (-1);
+	}
+	else if (swap_num == 0)
+		return (0);
+
+	swap_entries = calloc (swap_num, sizeof (*swap_entries));
+	if (swap_entries == NULL)
+	{
+		ERROR ("swap plugin: calloc failed.");
+		return (-1);
+	}
+
+	status = swapctl (SWAP_STATS, swap_entries, swap_num);
+	if (status != swap_entries)
+	{
+		ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
+				status);
+		sfree (swap_entries);
+		return (-1);
+	}
+
+#if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
+# define C_SWAP_BLOCK_SIZE DEV_BSIZE
+#else
+# define C_SWAP_BLOCK_SIZE 512
+#endif
+
+	for (i = 0; i < swap_entries; i++)
+	{
+		if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
+			continue;
+
+		used = swap_entries[i].se_inuse  * C_SWAP_BLOCK_SIZE;
+		total = swap_entries[i].se_nblks * C_SWAP_BLOCK_SIZE;
+	}
+
+	swap_submit ("used", (gauge_t) used);
+	swap_submit ("free", (gauge_t) (total - used));
+
+	sfree (swap_entries);
+/* #endif HAVE_SWAPCTL */
+
 #elif defined(VM_SWAPUSAGE)
 	int              mib[3];
 	size_t           mib_len;