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authorLennart Weller <lhw@ring0.de>2017-01-24 15:21:09 +0000
committerLennart Weller <lhw@ring0.de>2017-01-24 15:21:09 +0000
commit3ed3b02ed96ddab1c084811f3579b3a2aec83e04 (patch)
tree7a61ab288ae47800c4f11be5677d6ad8288dcd98 /src/plugin_proc_diskspace.c
parentNew upstream version 1.4.0+dfsg (diff)
downloadnetdata-3ed3b02ed96ddab1c084811f3579b3a2aec83e04.tar.xz
netdata-3ed3b02ed96ddab1c084811f3579b3a2aec83e04.zip
New upstream version 1.5.0+dfsgupstream/1.5.0+dfsg
Diffstat (limited to 'src/plugin_proc_diskspace.c')
-rw-r--r--src/plugin_proc_diskspace.c324
1 files changed, 324 insertions, 0 deletions
diff --git a/src/plugin_proc_diskspace.c b/src/plugin_proc_diskspace.c
new file mode 100644
index 000000000..43e6dd7c5
--- /dev/null
+++ b/src/plugin_proc_diskspace.c
@@ -0,0 +1,324 @@
+#include "common.h"
+
+#define DELAULT_EXLUDED_PATHS "/proc/* /sys/* /var/run/user/* /run/user/*"
+
+static struct mountinfo *disk_mountinfo_root = NULL;
+static int check_for_new_mountpoints_every = 15;
+
+static inline void mountinfo_reload(int force) {
+ static time_t last_loaded = 0;
+ time_t now = now_realtime_sec();
+
+ if(force || now - last_loaded >= check_for_new_mountpoints_every) {
+ // mountinfo_free() can be called with NULL disk_mountinfo_root
+ mountinfo_free(disk_mountinfo_root);
+
+ // re-read mountinfo in case something changed
+ disk_mountinfo_root = mountinfo_read(1);
+
+ last_loaded = now;
+ }
+}
+
+// Data to be stored in DICTIONARY mount_points used by do_disk_space_stats().
+// This DICTIONARY is used to lookup the settings of the mount point on each iteration.
+struct mount_point_metadata {
+ int do_space;
+ int do_inodes;
+
+ size_t collected; // the number of times this has been collected
+
+ RRDSET *st_space;
+ RRDDIM *rd_space_used;
+ RRDDIM *rd_space_avail;
+ RRDDIM *rd_space_reserved;
+
+ RRDSET *st_inodes;
+ RRDDIM *rd_inodes_used;
+ RRDDIM *rd_inodes_avail;
+ RRDDIM *rd_inodes_reserved;
+};
+
+static inline void do_disk_space_stats(struct mountinfo *mi, int update_every) {
+ const char *family = mi->mount_point;
+ const char *disk = mi->persistent_id;
+
+ static DICTIONARY *mount_points = NULL;
+ static SIMPLE_PATTERN *excluded_mountpoints = NULL;
+ int do_space, do_inodes;
+
+ if(unlikely(!mount_points)) {
+ const char *s;
+ SIMPLE_PREFIX_MODE mode = SIMPLE_PATTERN_EXACT;
+
+ if(config_exists("plugin:proc:/proc/diskstats", "exclude space metrics on paths") && !config_exists("plugin:proc:diskspace", "exclude space metrics on paths")) {
+ // the config exists in the old section
+ s = config_get("plugin:proc:/proc/diskstats", "exclude space metrics on paths", DELAULT_EXLUDED_PATHS);
+ mode = SIMPLE_PATTERN_PREFIX;
+ }
+ else
+ s = config_get("plugin:proc:diskspace", "exclude space metrics on paths", DELAULT_EXLUDED_PATHS);
+
+ mount_points = dictionary_create(DICTIONARY_FLAG_SINGLE_THREADED);
+ excluded_mountpoints = simple_pattern_create(s, mode);
+ }
+
+ struct mount_point_metadata *m = dictionary_get(mount_points, mi->mount_point);
+ if(unlikely(!m)) {
+ char var_name[4096 + 1];
+ snprintfz(var_name, 4096, "plugin:proc:diskspace:%s", mi->mount_point);
+
+ int def_space = config_get_boolean_ondemand("plugin:proc:diskspace", "space usage for all disks", CONFIG_ONDEMAND_ONDEMAND);
+ int def_inodes = config_get_boolean_ondemand("plugin:proc:diskspace", "inodes usage for all disks", CONFIG_ONDEMAND_ONDEMAND);
+
+ if(unlikely(simple_pattern_matches(excluded_mountpoints, mi->mount_point))) {
+ def_space = CONFIG_ONDEMAND_NO;
+ def_inodes = CONFIG_ONDEMAND_NO;
+ }
+
+ do_space = config_get_boolean_ondemand(var_name, "space usage", def_space);
+ do_inodes = config_get_boolean_ondemand(var_name, "inodes usage", def_inodes);
+
+ struct mount_point_metadata mp = {
+ .do_space = do_space,
+ .do_inodes = do_inodes,
+
+ .collected = 0,
+
+ .st_space = NULL,
+ .rd_space_avail = NULL,
+ .rd_space_used = NULL,
+ .rd_space_reserved = NULL,
+
+ .st_inodes = NULL,
+ .rd_inodes_avail = NULL,
+ .rd_inodes_used = NULL,
+ .rd_inodes_reserved = NULL
+ };
+
+ m = dictionary_set(mount_points, mi->mount_point, &mp, sizeof(struct mount_point_metadata));
+ }
+ else {
+ do_space = m->do_space;
+ do_inodes = m->do_inodes;
+ }
+
+ if(unlikely(do_space == CONFIG_ONDEMAND_NO && do_inodes == CONFIG_ONDEMAND_NO))
+ return;
+
+ if(unlikely(mi->flags & MOUNTINFO_READONLY && !m->collected))
+ return;
+
+ struct statvfs buff_statvfs;
+ if (statvfs(mi->mount_point, &buff_statvfs) < 0) {
+ error("Failed statvfs() for '%s' (disk '%s')", mi->mount_point, disk);
+ return;
+ }
+
+ // logic found at get_fs_usage() in coreutils
+ unsigned long bsize = (buff_statvfs.f_frsize) ? buff_statvfs.f_frsize : buff_statvfs.f_bsize;
+
+ fsblkcnt_t bavail = buff_statvfs.f_bavail;
+ fsblkcnt_t btotal = buff_statvfs.f_blocks;
+ fsblkcnt_t bavail_root = buff_statvfs.f_bfree;
+ fsblkcnt_t breserved_root = bavail_root - bavail;
+ fsblkcnt_t bused;
+ if(likely(btotal >= bavail_root))
+ bused = btotal - bavail_root;
+ else
+ bused = bavail_root - btotal;
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ if(unlikely(btotal != bavail + breserved_root + bused))
+ error("Disk block statistics for '%s' (disk '%s') do not sum up: total = %llu, available = %llu, reserved = %llu, used = %llu", mi->mount_point, disk, (unsigned long long)btotal, (unsigned long long)bavail, (unsigned long long)breserved_root, (unsigned long long)bused);
+#endif
+
+ // --------------------------------------------------------------------------
+
+ fsfilcnt_t favail = buff_statvfs.f_favail;
+ fsfilcnt_t ftotal = buff_statvfs.f_files;
+ fsfilcnt_t favail_root = buff_statvfs.f_ffree;
+ fsfilcnt_t freserved_root = favail_root - favail;
+ fsfilcnt_t fused = ftotal - favail_root;
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ if(unlikely(btotal != bavail + breserved_root + bused))
+ error("Disk inode statistics for '%s' (disk '%s') do not sum up: total = %llu, available = %llu, reserved = %llu, used = %llu", mi->mount_point, disk, (unsigned long long)ftotal, (unsigned long long)favail, (unsigned long long)freserved_root, (unsigned long long)fused);
+#endif
+
+ // --------------------------------------------------------------------------
+
+ int rendered = 0;
+
+ if(do_space == CONFIG_ONDEMAND_YES || (do_space == CONFIG_ONDEMAND_ONDEMAND && (bavail || breserved_root || bused))) {
+ if(unlikely(!m->st_space)) {
+ m->do_space = CONFIG_ONDEMAND_YES;
+ m->st_space = rrdset_find_bytype("disk_space", disk);
+ if(unlikely(!m->st_space)) {
+ char title[4096 + 1];
+ snprintfz(title, 4096, "Disk Space Usage for %s [%s]", family, mi->mount_source);
+ m->st_space = rrdset_create("disk_space", disk, NULL, family, "disk.space", title, "GB", 2023, update_every, RRDSET_TYPE_STACKED);
+ }
+
+ m->rd_space_avail = rrddim_add(m->st_space, "avail", NULL, bsize, 1024 * 1024 * 1024, RRDDIM_ABSOLUTE);
+ m->rd_space_used = rrddim_add(m->st_space, "used", NULL, bsize, 1024 * 1024 * 1024, RRDDIM_ABSOLUTE);
+ m->rd_space_reserved = rrddim_add(m->st_space, "reserved_for_root", "reserved for root", bsize, 1024 * 1024 * 1024, RRDDIM_ABSOLUTE);
+ }
+ else
+ rrdset_next(m->st_space);
+
+ rrddim_set_by_pointer(m->st_space, m->rd_space_avail, (collected_number)bavail);
+ rrddim_set_by_pointer(m->st_space, m->rd_space_used, (collected_number)bused);
+ rrddim_set_by_pointer(m->st_space, m->rd_space_reserved, (collected_number)breserved_root);
+ rrdset_done(m->st_space);
+
+ rendered++;
+ }
+
+ // --------------------------------------------------------------------------
+
+ if(do_inodes == CONFIG_ONDEMAND_YES || (do_inodes == CONFIG_ONDEMAND_ONDEMAND && (favail || freserved_root || fused))) {
+ if(unlikely(!m->st_inodes)) {
+ m->do_inodes = CONFIG_ONDEMAND_YES;
+ m->st_inodes = rrdset_find_bytype("disk_inodes", disk);
+ if(unlikely(!m->st_inodes)) {
+ char title[4096 + 1];
+ snprintfz(title, 4096, "Disk Files (inodes) Usage for %s [%s]", family, mi->mount_source);
+ m->st_inodes = rrdset_create("disk_inodes", disk, NULL, family, "disk.inodes", title, "Inodes", 2024, update_every, RRDSET_TYPE_STACKED);
+ }
+
+ m->rd_inodes_avail = rrddim_add(m->st_inodes, "avail", NULL, 1, 1, RRDDIM_ABSOLUTE);
+ m->rd_inodes_used = rrddim_add(m->st_inodes, "used", NULL, 1, 1, RRDDIM_ABSOLUTE);
+ m->rd_inodes_reserved = rrddim_add(m->st_inodes, "reserved_for_root", "reserved for root", 1, 1, RRDDIM_ABSOLUTE);
+ }
+ else
+ rrdset_next(m->st_inodes);
+
+ rrddim_set_by_pointer(m->st_inodes, m->rd_inodes_avail, (collected_number)favail);
+ rrddim_set_by_pointer(m->st_inodes, m->rd_inodes_used, (collected_number)fused);
+ rrddim_set_by_pointer(m->st_inodes, m->rd_inodes_reserved, (collected_number)freserved_root);
+ rrdset_done(m->st_inodes);
+
+ rendered++;
+ }
+
+ // --------------------------------------------------------------------------
+
+ if(likely(rendered))
+ m->collected++;
+}
+
+void *proc_diskspace_main(void *ptr) {
+ struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
+
+ info("DISKSPACE thread created with task id %d", gettid());
+
+ if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
+ error("Cannot set pthread cancel type to DEFERRED.");
+
+ if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
+ error("Cannot set pthread cancel state to ENABLE.");
+
+ int vdo_cpu_netdata = config_get_boolean("plugin:proc", "netdata server resources", 1);
+
+ int update_every = (int)config_get_number("plugin:proc:diskspace", "update every", rrd_update_every);
+ if(update_every < rrd_update_every)
+ update_every = rrd_update_every;
+
+ check_for_new_mountpoints_every = (int)config_get_number("plugin:proc:diskspace", "check for new mount points every", check_for_new_mountpoints_every);
+ if(check_for_new_mountpoints_every < update_every)
+ check_for_new_mountpoints_every = update_every;
+
+ struct rusage thread;
+
+ usec_t last = 0, dt = 0;
+ usec_t step = update_every * USEC_PER_SEC;
+ for(;;) {
+ usec_t now = now_monotonic_usec();
+ usec_t next = now - (now % step) + step;
+
+ dt = (last)?now - last:0;
+
+ while(now < next) {
+ sleep_usec(next - now);
+ now = now_monotonic_usec();
+ }
+
+ last = now;
+
+ if(unlikely(netdata_exit)) break;
+
+
+ // --------------------------------------------------------------------------
+ // this is smart enough not to reload it every time
+
+ mountinfo_reload(0);
+
+
+ // --------------------------------------------------------------------------
+ // disk space metrics
+
+ struct mountinfo *mi;
+ for(mi = disk_mountinfo_root; mi; mi = mi->next) {
+
+ if(unlikely(mi->flags & (MOUNTINFO_IS_DUMMY | MOUNTINFO_IS_BIND | MOUNTINFO_IS_SAME_DEV | MOUNTINFO_NO_STAT | MOUNTINFO_NO_SIZE)))
+ continue;
+
+ do_disk_space_stats(mi, update_every);
+ if(unlikely(netdata_exit)) break;
+ }
+
+ if(unlikely(netdata_exit)) break;
+
+ if(vdo_cpu_netdata) {
+ static RRDSET *stcpu_thread = NULL, *st_duration = NULL;
+ static RRDDIM *rd_user = NULL, *rd_system = NULL, *rd_duration = NULL;
+
+ // ----------------------------------------------------------------
+
+ getrusage(RUSAGE_THREAD, &thread);
+
+ if(!stcpu_thread) {
+ stcpu_thread = rrdset_find("netdata.plugin_diskspace");
+ if(!stcpu_thread) stcpu_thread = rrdset_create("netdata", "plugin_diskspace", NULL, "diskspace", NULL
+ , "NetData Disk Space Plugin CPU usage", "milliseconds/s", 132020
+ , update_every, RRDSET_TYPE_STACKED);
+
+ rd_user = rrddim_add(stcpu_thread, "user", NULL, 1, 1000, RRDDIM_INCREMENTAL);
+ rd_system = rrddim_add(stcpu_thread, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
+ }
+ else
+ rrdset_next(stcpu_thread);
+
+ rrddim_set_by_pointer(stcpu_thread, rd_user, thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
+ rrddim_set_by_pointer(stcpu_thread, rd_system, thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
+ rrdset_done(stcpu_thread);
+
+ // ----------------------------------------------------------------
+
+ if(!st_duration) {
+ st_duration = rrdset_find("netdata.plugin_diskspace_dt");
+ if(!st_duration) st_duration = rrdset_create("netdata", "plugin_diskspace_dt", NULL, "diskspace", NULL
+ , "NetData Disk Space Plugin Duration", "milliseconds/run", 132021
+ , update_every, RRDSET_TYPE_AREA);
+
+ rd_duration = rrddim_add(st_duration, "duration", NULL, 1, 1000, RRDDIM_ABSOLUTE);
+ }
+ else
+ rrdset_next(st_duration);
+
+ rrddim_set_by_pointer(st_duration, rd_duration, dt);
+ rrdset_done(st_duration);
+
+ // ----------------------------------------------------------------
+
+ if(unlikely(netdata_exit)) break;
+ }
+ }
+
+ info("DISKSPACE thread exiting");
+
+ static_thread->enabled = 0;
+ pthread_exit(NULL);
+ return NULL;
+}