/**
* collectd - src/swap.c
- * Copyright (C) 2005,2006 Florian octo Forster
+ * Copyright (C) 2005-2007 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
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
+ * Free Software Foundation; only version 2 of the License is applicable.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
# include <kvm.h>
#endif
-#define MODULE_NAME "swap"
-
-#if KERNEL_LINUX || HAVE_LIBKSTAT || defined(VM_SWAPUSAGE) || HAVE_LIBKVM || HAVE_LIBSTATGRAB
-# define SWAP_HAVE_READ 1
-#else
-# define SWAP_HAVE_READ 0
-#endif
-
#undef MAX
#define MAX(x,y) ((x) > (y) ? (x) : (y))
-static char *swap_file = "swap.rrd";
-
-/* 1099511627776 == 1TB ought to be enough for anyone ;) */
-static char *ds_def[] =
-{
- "DS:used:GAUGE:"COLLECTD_HEARTBEAT":0:1099511627776",
- "DS:free:GAUGE:"COLLECTD_HEARTBEAT":0:1099511627776",
- "DS:cached:GAUGE:"COLLECTD_HEARTBEAT":0:1099511627776",
- "DS:resv:GAUGE:"COLLECTD_HEARTBEAT":0:1099511627776",
- NULL
-};
-static int ds_num = 4;
-
#if KERNEL_LINUX
/* No global variables */
/* #endif KERNEL_LINUX */
#elif HAVE_LIBSTATGRAB
/* No global variables */
+/* #endif HAVE_LIBSTATGRAB */
+
+#else
+# error "No applicable input method."
#endif /* HAVE_LIBSTATGRAB */
-static void swap_init (void)
+static int swap_init (void)
{
#if KERNEL_LINUX
/* No init stuff */
NULL)) /* errstr */
== NULL)
{
- syslog (LOG_ERR, "swap plugin: kvm_open failed.");
- return;
+ ERROR ("swap plugin: kvm_open failed.");
+ return (-1);
}
/* #endif HAVE_LIBKVM */
/* No init stuff */
#endif /* HAVE_LIBSTATGRAB */
- return;
+ return (0);
}
-static void swap_write (char *host, char *inst, char *val)
+static void swap_submit (const char *type_instance, double value)
{
- rrd_update_file (host, swap_file, val, ds_def, ds_num);
-}
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
-#if SWAP_HAVE_READ
-static void swap_submit (unsigned long long swap_used,
- unsigned long long swap_free,
- unsigned long long swap_cached,
- unsigned long long swap_resv)
-{
- char buffer[512];
+ values[0].gauge = value;
- if (snprintf (buffer, 512, "%u:%llu:%llu:%llu:%llu", (unsigned int) curtime,
- swap_used, swap_free, swap_cached, swap_resv) >= 512)
- return;
+ vl.values = values;
+ vl.values_len = 1;
+ vl.time = time (NULL);
+ strcpy (vl.host, hostname_g);
+ strcpy (vl.plugin, "swap");
+ strncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
- plugin_submit (MODULE_NAME, "-", buffer);
-}
+ plugin_dispatch_values ("swap", &vl);
+} /* void swap_submit */
-static void swap_read (void)
+static int swap_read (void)
{
#if KERNEL_LINUX
FILE *fh;
if ((fh = fopen ("/proc/meminfo", "r")) == NULL)
{
- syslog (LOG_WARNING, "memory: fopen: %s", strerror (errno));
- return;
+ char errbuf[1024];
+ WARNING ("memory: fopen: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
}
while (fgets (buffer, 1024, fh) != NULL)
}
if (fclose (fh))
- syslog (LOG_WARNING, "memory: fclose: %s", strerror (errno));
+ {
+ char errbuf[1024];
+ WARNING ("memory: fclose: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ }
if ((swap_total == 0LL) || ((swap_free + swap_cached) > swap_total))
- return;
+ return (-1);
swap_used = swap_total - (swap_free + swap_cached);
- swap_submit (swap_used, swap_free, swap_cached, -1LL);
+ swap_submit ("used", swap_used);
+ swap_submit ("free", swap_free);
+ swap_submit ("cached", swap_cached);
/* #endif KERNEL_LINUX */
#elif HAVE_LIBKSTAT
if (swapctl (SC_AINFO, &ai) == -1)
{
- syslog (LOG_ERR, "swap plugin: swapctl failed: %s",
- strerror (errno));
- return;
+ char errbuf[1024];
+ ERROR ("swap plugin: swapctl failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
}
/*
swap_avail = ai.ani_max - ai.ani_resv;
swap_avail *= pagesize;
- swap_submit (swap_alloc, swap_avail, -1LL, swap_resv - swap_alloc);
+ swap_submit ("used", swap_alloc);
+ swap_submit ("free", swap_avail);
+ swap_submit ("reserved", swap_resv - swap_alloc);
/* #endif HAVE_LIBKSTAT */
#elif defined(VM_SWAPUSAGE)
sw_usage_len = sizeof (struct xsw_usage);
if (sysctl (mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
- return;
+ return (-1);
/* The returned values are bytes. */
- swap_submit (sw_usage.xsu_used, sw_usage.xsu_avail, -1LL, -1LL);
+ swap_submit ("used", sw_usage.xsu_used);
+ swap_submit ("free", sw_usage.xsu_avail);
/* #endif VM_SWAPUSAGE */
#elif HAVE_LIBKVM
unsigned long long total;
if (kvm_obj == NULL)
- return;
+ return (-1);
/* only one structure => only get the grand total, no details */
status = kvm_getswapinfo (kvm_obj, &data_s, 1, 0);
if (status == -1)
- return;
+ return (-1);
total = (unsigned long long) data_s.ksw_total;
used = (unsigned long long) data_s.ksw_used;
free = total - used;
- swap_submit (used, free, -1LL, -1LL);
+ swap_submit ("used", used);
+ swap_submit ("free", free);
/* #endif HAVE_LIBKVM */
#elif HAVE_LIBSTATGRAB
sg_swap_stats *swap;
- if ((swap = sg_get_swap_stats ()) != NULL)
- swap_submit (swap->used, swap->free, -1LL, -1LL);
+ swap = sg_get_swap_stats ();
+
+ if (swap == NULL)
+ return (-1);
+
+ swap_submit ("used", swap->used);
+ swap_submit ("free", swap->free);
#endif /* HAVE_LIBSTATGRAB */
-}
-#else
-# define swap_read NULL
-#endif /* SWAP_HAVE_READ */
+
+ return (0);
+} /* int swap_read */
void module_register (void)
{
- plugin_register (MODULE_NAME, swap_init, swap_read, swap_write);
-}
-
-#undef MODULE_NAME
+ plugin_register_init ("swap", swap_init);
+ plugin_register_read ("swap", swap_read);
+} /* void module_register */