# For hddtemp module
AC_CHECK_HEADERS(linux/major.h libgen.h)
+# For md module (Linux only)
+if test "x$ac_system" = "xLinux"
+then
+ AC_CHECK_HEADERS(linux/raid/md_u.h,
+ [have_linux_raid_md_u_h="yes"],
+ [have_linux_raid_md_u_h="no"],
+[
+#include <sys/ioctl.h>
+#include <linux/major.h>
+#include <linux/types.h>
+])
+else
+ have_linux_raid_md_u_h="no"
+fi
+
# For the battery plugin
AC_CHECK_HEADERS(IOKit/ps/IOPowerSources.h, [], [],
[
AC_PLUGIN([match_timediff], [yes], [The timediff match])
AC_PLUGIN([match_value], [yes], [The value match])
AC_PLUGIN([mbmon], [yes], [Query mbmond])
+AC_PLUGIN([md], [$have_linux_raid_md_u_h], [md (Linux software RAID) devices])
AC_PLUGIN([memcachec], [$with_libmemcached], [memcachec statistics])
AC_PLUGIN([memcached], [yes], [memcached statistics])
AC_PLUGIN([memory], [$plugin_memory], [Memory usage])
match_timediff . . . $enable_match_timediff
match_value . . . . . $enable_match_value
mbmon . . . . . . . . $enable_mbmon
+ md . . . . . . . . . $enable_md
memcachec . . . . . . $enable_memcachec
memcached . . . . . . $enable_memcached
memory . . . . . . . $enable_memory
--- /dev/null
+/**
+ * collectd - src/md.c
+ * Copyright (C) 2010,2011 Michael Hanselmann
+ *
+ * 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; 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
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Author:
+ * Michael Hanselmann
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "utils_ignorelist.h"
+
+#include <sys/ioctl.h>
+
+#include <linux/major.h>
+#include <linux/raid/md_u.h>
+
+#define PROC_DISKSTATS "/proc/diskstats"
+#define DEV_DIR "/dev"
+
+static const char *config_keys[] =
+{
+ "Device",
+ "IgnoreSelected"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static ignorelist_t *ignorelist = NULL;
+
+static int md_config (const char *key, const char *value)
+{
+ if (ignorelist == NULL)
+ ignorelist = ignorelist_create (/* invert = */ 1);
+ if (ignorelist == NULL)
+ return (1);
+
+ if (strcasecmp (key, "Device") == 0)
+ {
+ ignorelist_add (ignorelist, value);
+ }
+ else if (strcasecmp (key, "IgnoreSelected") == 0)
+ {
+ ignorelist_set_invert (ignorelist, IS_TRUE (value) ? 0 : 1);
+ }
+ else
+ {
+ return (-1);
+ }
+
+ return (0);
+}
+
+static void md_submit (const int minor, const char *type_instance,
+ gauge_t value)
+{
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+
+ values[0].gauge = value;
+
+ vl.values = values;
+ vl.values_len = 1;
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "md", sizeof (vl.plugin));
+ ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
+ "%i", minor);
+ sstrncpy (vl.type, "md_disks", sizeof (vl.type));
+ sstrncpy (vl.type_instance, type_instance,
+ sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+} /* void md_submit */
+
+static void md_process (const int minor, const char *path)
+{
+ char errbuf[1024];
+ int fd;
+ struct stat st;
+ mdu_array_info_t array;
+
+ fd = open (path, O_RDONLY);
+ if (fd < 0)
+ {
+ WARNING ("md: open(%s): %s", path,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return;
+ }
+
+ if (fstat (fd, &st) < 0)
+ {
+ WARNING ("md: Unable to fstat file descriptor for %s: %s", path,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ close (fd);
+ return;
+ }
+
+ if (! S_ISBLK (st.st_mode))
+ {
+ WARNING ("md: %s is no block device", path);
+ close (fd);
+ return;
+ }
+
+ if (st.st_rdev != makedev (MD_MAJOR, minor))
+ {
+ WARNING ("md: Major/minor of %s are %i:%i, should be %i:%i",
+ path, (int)major(st.st_rdev), (int)minor(st.st_rdev),
+ (int)MD_MAJOR, minor);
+ close (fd);
+ return;
+ }
+
+ /* Retrieve md information */
+ if (ioctl (fd, GET_ARRAY_INFO, &array) < 0) {
+ WARNING ("md: Unable to retrieve array info from %s: %s", path,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ close (fd);
+ return;
+ }
+
+ close (fd);
+
+ md_submit (minor, "number", (gauge_t) array.nr_disks);
+ md_submit (minor, "raid", (gauge_t) array.raid_disks);
+ md_submit (minor, "active", (gauge_t) array.active_disks);
+ md_submit (minor, "working", (gauge_t) array.working_disks);
+ md_submit (minor, "failed", (gauge_t) array.failed_disks);
+ md_submit (minor, "spare", (gauge_t) array.spare_disks);
+
+ return;
+} /* void md_process */
+
+static int md_read (void)
+{
+ FILE *fh;
+ char buffer[1024];
+
+ fh = fopen (PROC_DISKSTATS, "r");
+ if (fh == NULL) {
+ char errbuf[1024];
+ WARNING ("md: Unable to open %s: %s",
+ PROC_DISKSTATS ,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+
+ /* Iterate md devices */
+ while (fgets (buffer, sizeof (buffer), fh) != NULL)
+ {
+ char path[PATH_MAX];
+ char *fields[4];
+ char *name;
+ int major, minor;
+
+ /* Extract interesting fields */
+ if (strsplit (buffer, fields, STATIC_ARRAY_SIZE(fields)) < 3)
+ continue;
+
+ major = atoi (fields[0]);
+
+ if (major != MD_MAJOR)
+ continue;
+
+ minor = atoi (fields[1]);
+ name = fields[2];
+
+ if (ignorelist_match (ignorelist, name))
+ continue;
+
+ /* FIXME: Don't hardcode path. Walk /dev collecting major,
+ * minor and name, then use lookup table to find device.
+ * Alternatively create a temporary device file with correct
+ * major/minor, but that again can be tricky if the filesystem
+ * with the device file is mounted using the "nodev" option.
+ */
+ ssnprintf (path, sizeof (path), "%s/%s", DEV_DIR, name);
+
+ md_process (minor, path);
+ }
+
+ fclose (fh);
+
+ return (0);
+} /* int md_read */
+
+void module_register (void)
+{
+ plugin_register_config ("md", md_config, config_keys, config_keys_num);
+ plugin_register_read ("md", md_read);
+} /* void module_register */
projects / collectd.git / commitdiff