/**
* collectd - src/swap.c
- * Copyright (C) 2005-2009 Florian octo Forster
+ * Copyright (C) 2005-2010 Florian octo Forster
* Copyright (C) 2009 Stefan Völkel
* Copyright (C) 2009 Manuel Sanmartin
+ * Copyright (C) 2010 Aurélien Reynaud
*
* 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
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
- * Florian octo Forster <octo at verplant.org>
+ * Florian octo Forster <octo at collectd.org>
* Manuel Sanmartin
+ * Aurélien Reynaud <collectd at wattapower.net>
**/
#if HAVE_CONFIG_H
/* No global variables */
/* #endif KERNEL_LINUX */
-#elif HAVE_LIBKSTAT
+#elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
static derive_t pagesize;
-static kstat_t *ksp;
-/* #endif HAVE_LIBKSTAT */
-#elif HAVE_SWAPCTL
-/* No global variables */
-/* #endif HAVE_SWAPCTL */
+static const char *config_keys[] =
+{
+ "ReportByDevice"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static _Bool report_by_device = 0;
+/* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
#elif defined(VM_SWAPUSAGE)
/* No global variables */
#elif HAVE_PERFSTAT
static int pagesize;
static perfstat_memory_total_t pmemory;
-/*# endif HAVE_PERFSTAT */
+/*# endif HAVE_PERFSTAT */
#else
# error "No applicable input method."
/* No init stuff */
/* #endif KERNEL_LINUX */
-#elif HAVE_LIBKSTAT
+#elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
/* getpagesize(3C) tells me this does not fail.. */
pagesize = (derive_t) getpagesize ();
- if (get_kstat (&ksp, "unix", 0, "system_pages"))
- ksp = NULL;
-/* #endif HAVE_LIBKSTAT */
-
-#elif HAVE_SWAPCTL
- /* No init stuff */
/* #endif HAVE_SWAPCTL */
#elif defined(VM_SWAPUSAGE)
return (0);
}
-static void swap_submit (const char *type_instance, derive_t value, unsigned type)
+static void swap_submit_inst (const char *plugin_instance, /* {{{ */
+ const char *type_instance, derive_t value, unsigned type)
{
value_t values[1];
value_list_t vl = VALUE_LIST_INIT;
vl.values_len = 1;
sstrncpy (vl.host, hostname_g, sizeof (vl.host));
sstrncpy (vl.plugin, "swap", sizeof (vl.plugin));
+ if (plugin_instance != NULL)
+ sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
plugin_dispatch_values (&vl);
-} /* void swap_submit */
+} /* }}} void swap_submit_inst */
-static int swap_read (void)
+static void swap_submit (const char *type_instance, derive_t value, unsigned type)
{
+ swap_submit_inst (/* plugin instance = */ NULL,
+ type_instance, value, type);
+}
+
#if KERNEL_LINUX
+static int swap_read (void) /* {{{ */
+{
FILE *fh;
char buffer[1024];
char *fields[8];
int numfields;
+ _Bool old_kernel=0;
+
derive_t swap_used = 0;
derive_t swap_cached = 0;
derive_t swap_free = 0;
return (-1);
}
- while (fgets (buffer, 1024, fh) != NULL)
+ while (fgets (buffer, sizeof (buffer), fh) != NULL)
{
- derive_t *val = NULL;
-
- if (strncasecmp (buffer, "SwapTotal:", 10) == 0)
- val = &swap_total;
- else if (strncasecmp (buffer, "SwapFree:", 9) == 0)
- val = &swap_free;
- else if (strncasecmp (buffer, "SwapCached:", 11) == 0)
- val = &swap_cached;
- else
- continue;
-
- numfields = strsplit (buffer, fields, 8);
-
+ numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
if (numfields < 2)
continue;
- *val = (derive_t) atoll (fields[1]) * 1024LL;
+ if (strcasecmp (fields[0], "SwapTotal:") == 0)
+ strtoderive (fields[1], &swap_total);
+ else if (strcasecmp (fields[0], "SwapFree:") == 0)
+ strtoderive (fields[1], &swap_free);
+ else if (strcasecmp (fields[0], "SwapCached:") == 0)
+ strtoderive (fields[1], &swap_cached);
}
if (fclose (fh))
sstrerror (errno, errbuf, sizeof (errbuf)));
}
- if ((swap_total == 0LL) || ((swap_free + swap_cached) > swap_total))
+ if ((swap_free + swap_cached) > swap_total)
return (-1);
swap_used = swap_total - (swap_free + swap_cached);
if ((fh = fopen ("/proc/vmstat", "r")) == NULL)
{
- char errbuf[1024];
- WARNING ("swap: fopen: %s",
- sstrerror (errno, errbuf, sizeof (errbuf)));
- return (-1);
+ // /proc/vmstat does not exist in kernels <2.6
+ if ((fh = fopen ("/proc/stat", "r")) == NULL )
+ {
+ char errbuf[1024];
+ WARNING ("swap: fopen: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+ else
+ old_kernel = 1;
}
- while (fgets (buffer, 1024, fh) != NULL)
+ while (fgets (buffer, sizeof (buffer), fh) != NULL)
{
- derive_t *val = NULL;
-
- if (strncasecmp (buffer, "pswpin", 6) == 0)
- val = &swap_in;
- else if (strncasecmp (buffer, "pswpout", 7) == 0)
- val = &swap_out;
- else
- continue;
-
- numfields = strsplit (buffer, fields, 8);
-
- if (numfields < 2)
- continue;
-
- *val = (derive_t) atoll (fields[1]);
- }
+ numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
+
+ if (!old_kernel)
+ {
+ if (numfields != 2)
+ continue;
+
+ if (strcasecmp ("pswpin", fields[0]) == 0)
+ strtoderive (fields[1], &swap_in);
+ else if (strcasecmp ("pswpout", fields[0]) == 0)
+ strtoderive (fields[1], &swap_out);
+ }
+ else /* if (old_kernel) */
+ {
+ if (numfields != 3)
+ continue;
+
+ if (strcasecmp ("page", fields[0]) == 0)
+ {
+ strtoderive (fields[1], &swap_in);
+ strtoderive (fields[2], &swap_out);
+ }
+ }
+ } /* while (fgets) */
if (fclose (fh))
{
sstrerror (errno, errbuf, sizeof (errbuf)));
}
- swap_submit ("used", swap_used, DS_TYPE_GAUGE);
- swap_submit ("free", swap_free, DS_TYPE_GAUGE);
- swap_submit ("cached", swap_cached, DS_TYPE_GAUGE);
- swap_submit ("in", swap_in, DS_TYPE_DERIVE);
+ swap_submit ("used", 1024 * swap_used, DS_TYPE_GAUGE);
+ swap_submit ("free", 1024 * swap_free, DS_TYPE_GAUGE);
+ swap_submit ("cached", 1024 * swap_cached, DS_TYPE_GAUGE);
+ swap_submit ("in", swap_in, DS_TYPE_DERIVE);
swap_submit ("out", swap_out, DS_TYPE_DERIVE);
+ return (0);
+} /* }}} int swap_read */
/* #endif KERNEL_LINUX */
-#elif HAVE_LIBKSTAT
+/*
+ * Under Solaris, two mechanisms can be used to read swap statistics, swapctl
+ * and kstat. The former reads physical space used on a device, the latter
+ * reports the view from the virtual memory system. It was decided that the
+ * kstat-based information should be moved to the "vmem" plugin, but nobody
+ * with enough Solaris experience was available at that time to do this. The
+ * code below is still there for your reference but it won't be activated in
+ * *this* plugin again. --octo
+ */
+#elif 0 && HAVE_LIBKSTAT
+/* kstat-based read function */
+static int swap_read_kstat (void) /* {{{ */
+{
derive_t swap_alloc;
derive_t swap_resv;
derive_t swap_avail;
* However, Solaris does not allow to allocated/reserved more than the
* available swap (physical memory + disk swap), so the pedant may
* prefer: allocated + unallocated = reserved, available
- *
+ *
* We map the above to: used + resv = n/a, free
*
* Does your brain hurt yet? - Christophe Kalt
swap_submit ("used", swap_alloc, DS_TYPE_GAUGE);
swap_submit ("free", swap_avail, DS_TYPE_GAUGE);
swap_submit ("reserved", swap_resv, DS_TYPE_GAUGE);
-/* #endif HAVE_LIBKSTAT */
-#elif HAVE_SWAPCTL
+ return (0);
+} /* }}} int swap_read_kstat */
+/* #endif 0 && HAVE_LIBKSTAT */
+
+#elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
+/* swapctl-based read function */
+static int swap_read (void) /* {{{ */
+{
+ swaptbl_t *s;
+ char *s_paths;
+ int swap_num;
+ int status;
+ int i;
+
+ derive_t avail = 0;
+ derive_t total = 0;
+
+ swap_num = swapctl (SC_GETNSWP, NULL);
+ if (swap_num < 0)
+ {
+ ERROR ("swap plugin: swapctl (SC_GETNSWP) failed with status %i.",
+ swap_num);
+ return (-1);
+ }
+ else if (swap_num == 0)
+ return (0);
+
+ /* Allocate and initialize the swaptbl_t structure */
+ s = (swaptbl_t *) smalloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable));
+ if (s == NULL)
+ {
+ ERROR ("swap plugin: smalloc failed.");
+ return (-1);
+ }
+
+ /* Memory to store the path names. We only use these paths when the
+ * separate option has been configured, but it's easier to just
+ * allocate enough memory in any case. */
+ s_paths = calloc (swap_num, PATH_MAX);
+ if (s_paths == NULL)
+ {
+ ERROR ("swap plugin: malloc failed.");
+ sfree (s);
+ return (-1);
+ }
+ for (i = 0; i < swap_num; i++)
+ s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX);
+ s->swt_n = swap_num;
+
+ status = swapctl (SC_LIST, s);
+ if (status < 0)
+ {
+ char errbuf[1024];
+ ERROR ("swap plugin: swapctl (SC_LIST) failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ sfree (s_paths);
+ sfree (s);
+ return (-1);
+ }
+ else if (swap_num < status)
+ {
+ /* more elements returned than requested */
+ ERROR ("swap plugin: I allocated memory for %i structure%s, "
+ "but swapctl(2) claims to have returned %i. "
+ "I'm confused and will give up.",
+ swap_num, (swap_num == 1) ? "" : "s",
+ status);
+ sfree (s_paths);
+ sfree (s);
+ return (-1);
+ }
+ else if (swap_num > status)
+ /* less elements returned than requested */
+ swap_num = status;
+
+ for (i = 0; i < swap_num; i++)
+ {
+ char path[PATH_MAX];
+ derive_t this_total;
+ derive_t this_avail;
+
+ if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
+ continue;
+
+ this_total = ((derive_t) s->swt_ent[i].ste_pages) * pagesize;
+ this_avail = ((derive_t) s->swt_ent[i].ste_free) * pagesize;
+
+ /* Shortcut for the "combined" setting (default) */
+ if (!report_by_device)
+ {
+ avail += this_avail;
+ total += this_total;
+ continue;
+ }
+
+ /* Okay, using "/" as swap device would be super-weird, but
+ * we'll handle it anyway to cover all cases. */
+ if (strcmp ("/", s->swt_ent[i].ste_path) == 0)
+ sstrncpy (path, "root", sizeof (path));
+ else
+ {
+ int j;
+
+ s->swt_ent[i].ste_path[PATH_MAX - 1] = 0;
+ /* Don't copy the leading slash */
+ sstrncpy (path, &s->swt_ent[i].ste_path[1], sizeof (path));
+ /* Convert slashes to dashes, just like the "df" plugin. */
+ for (j = 0; path[j] != 0; j++)
+ if (path[j] == '/')
+ path[j] = '-';
+ }
+
+ swap_submit_inst (path, "used", this_total - this_avail, DS_TYPE_GAUGE);
+ swap_submit_inst (path, "free", this_avail, DS_TYPE_GAUGE);
+ } /* for (swap_num) */
+
+ if (total < avail)
+ {
+ ERROR ("swap plugin: Total swap space (%"PRIi64") "
+ "is less than free swap space (%"PRIi64").",
+ total, avail);
+ sfree (s_paths);
+ sfree (s);
+ return (-1);
+ }
+
+ /* If the "separate" option was specified (report_by_device == 2), all
+ * values have already been dispatched from within the loop. */
+ if (!report_by_device)
+ {
+ swap_submit ("used", total - avail, DS_TYPE_GAUGE);
+ swap_submit ("free", avail, DS_TYPE_GAUGE);
+ }
+
+ sfree (s_paths);
+ sfree (s);
+ return (0);
+} /* }}} int swap_read */
+
+/* Configuration: Present when swapctl or both methods are available. */
+static int swap_config (const char *key, const char *value) /* {{{ */
+{
+ if (strcasecmp ("ReportByDevice", key) == 0)
+ {
+ if (IS_TRUE (value))
+ report_by_device = 1;
+ else
+ report_by_device = 0;
+ }
+ else
+ {
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int swap_config */
+/* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
+
+#elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
+static int swap_read (void) /* {{{ */
+{
struct swapent *swap_entries;
int swap_num;
int status;
derive_t used = 0;
derive_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)
{
swap_submit ("free", total - used, DS_TYPE_GAUGE);
sfree (swap_entries);
-/* #endif HAVE_SWAPCTL */
+
+ return (0);
+} /* }}} int swap_read */
+/* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
#elif defined(VM_SWAPUSAGE)
+static int swap_read (void) /* {{{ */
+{
int mib[3];
size_t mib_len;
struct xsw_usage sw_usage;
/* The returned values are bytes. */
swap_submit ("used", (derive_t) sw_usage.xsu_used, DS_TYPE_GAUGE);
swap_submit ("free", (derive_t) sw_usage.xsu_avail, DS_TYPE_GAUGE);
+
+ return (0);
+} /* }}} int swap_read */
/* #endif VM_SWAPUSAGE */
#elif HAVE_LIBKVM_GETSWAPINFO
+static int swap_read (void) /* {{{ */
+{
struct kvm_swap data_s;
int status;
swap_submit ("used", used, DS_TYPE_GAUGE);
swap_submit ("free", free, DS_TYPE_GAUGE);
+
+ return (0);
+} /* }}} int swap_read */
/* #endif HAVE_LIBKVM_GETSWAPINFO */
#elif HAVE_LIBSTATGRAB
+static int swap_read (void) /* {{{ */
+{
sg_swap_stats *swap;
swap = sg_get_swap_stats ();
swap_submit ("used", (derive_t) swap->used, DS_TYPE_GAUGE);
swap_submit ("free", (derive_t) swap->free, DS_TYPE_GAUGE);
+
+ return (0);
+} /* }}} int swap_read */
/* #endif HAVE_LIBSTATGRAB */
#elif HAVE_PERFSTAT
+static int swap_read (void) /* {{{ */
+{
if(perfstat_memory_total(NULL, &pmemory, sizeof(perfstat_memory_total_t), 1) < 0)
{
char errbuf[1024];
}
swap_submit ("used", (derive_t) (pmemory.pgsp_total - pmemory.pgsp_free) * pagesize, DS_TYPE_GAUGE);
swap_submit ("free", (derive_t) pmemory.pgsp_free * pagesize , DS_TYPE_GAUGE);
-#endif /* HAVE_PERFSTAT */
return (0);
-} /* int swap_read */
+} /* }}} int swap_read */
+#endif /* HAVE_PERFSTAT */
void module_register (void)
{
+#if HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
+ plugin_register_config ("swap", swap_config, config_keys, config_keys_num);
+#endif
plugin_register_init ("swap", swap_init);
plugin_register_read ("swap", swap_read);
} /* void module_register */
+
+/* vim: set fdm=marker : */
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