3 #ifndef NETDATA_RELOAD_MOUNTINFO_EVERY
4 #define NETDATA_RELOAD_MOUNTINFO_EVERY 60
7 #define DELAULT_EXLUDED_PATHS "/proc/ /sys/ /var/run/user/ /run/user/"
9 static struct mountinfo *disk_mountinfo_root = NULL;
11 static inline void mountinfo_reload(int force) {
12 static time_t last_loaded = 0;
13 time_t now = now_realtime_sec();
15 if(force || now - last_loaded >= NETDATA_RELOAD_MOUNTINFO_EVERY) {
16 // mountinfo_free() can be called with NULL disk_mountinfo_root
17 mountinfo_free(disk_mountinfo_root);
19 // re-read mountinfo in case something changed
20 disk_mountinfo_root = mountinfo_read();
26 // Data to be stored in DICTIONARY mount_points used by do_disk_space_stats().
27 // This DICTIONARY is used to lookup the settings of the mount point on each iteration.
28 struct mount_point_metadata {
34 static inline void do_disk_space_stats(struct mountinfo *mi, int update_every) {
35 const char *family = mi->mount_point;
36 const char *disk = mi->persistent_id;
38 static DICTIONARY *mount_points = NULL;
39 static NETDATA_SIMPLE_PATTERN *excluded_mountpoints = NULL;
40 int do_space, do_inodes;
42 if(unlikely(!mount_points)) {
45 if(config_exists("plugin:proc:/proc/diskstats", "exclude space metrics on paths") && !config_exists("plugin:proc:diskspace", "exclude space metrics on paths")) {
46 // the config exists in the old section
47 s = config_get("plugin:proc:/proc/diskstats", "exclude space metrics on paths", DELAULT_EXLUDED_PATHS);
49 // set it to the new section
50 config_set("plugin:proc:diskspace", "exclude space metrics on paths", s);
53 s = config_get("plugin:proc:diskspace", "exclude space metrics on paths", DELAULT_EXLUDED_PATHS);
55 mount_points = dictionary_create(DICTIONARY_FLAG_SINGLE_THREADED);
56 excluded_mountpoints = netdata_simple_pattern_list_create(s, NETDATA_SIMPLE_PATTERN_MODE_PREFIX);
59 struct mount_point_metadata *m = dictionary_get(mount_points, mi->mount_point);
61 char var_name[4096 + 1];
62 snprintfz(var_name, 4096, "plugin:proc:diskspace:%s", mi->mount_point);
64 int def_space = config_get_boolean_ondemand("plugin:proc:diskspace", "space usage for all disks", CONFIG_ONDEMAND_ONDEMAND);
65 int def_inodes = config_get_boolean_ondemand("plugin:proc:diskspace", "inodes usage for all disks", CONFIG_ONDEMAND_ONDEMAND);
67 if(unlikely(netdata_simple_pattern_list_matches(excluded_mountpoints, mi->mount_point))) {
68 def_space = CONFIG_ONDEMAND_NO;
69 def_inodes = CONFIG_ONDEMAND_NO;
72 do_space = config_get_boolean_ondemand(var_name, "space usage", def_space);
73 do_inodes = config_get_boolean_ondemand(var_name, "inodes usage", def_inodes);
75 struct mount_point_metadata mp = {
77 .do_inodes = do_inodes,
78 .update_every = rrd_update_every
81 dictionary_set(mount_points, mi->mount_point, &mp, sizeof(struct mount_point_metadata));
84 do_space = m->do_space;
85 do_inodes = m->do_inodes;
86 update_every = m->update_every;
89 if(unlikely(do_space == CONFIG_ONDEMAND_NO && do_inodes == CONFIG_ONDEMAND_NO))
92 struct statvfs buff_statvfs;
93 if (statvfs(mi->mount_point, &buff_statvfs) < 0) {
94 error("Failed statvfs() for '%s' (disk '%s')", mi->mount_point, disk);
98 // taken from get_fs_usage() found in coreutils
99 unsigned long bsize = (buff_statvfs.f_frsize) ? buff_statvfs.f_frsize : buff_statvfs.f_bsize;
101 fsblkcnt_t bavail = buff_statvfs.f_bavail;
102 fsblkcnt_t btotal = buff_statvfs.f_blocks;
103 fsblkcnt_t bavail_root = buff_statvfs.f_bfree;
104 fsblkcnt_t breserved_root = bavail_root - bavail;
106 if(likely(btotal >= bavail_root))
107 bused = btotal - bavail_root;
109 bused = bavail_root - btotal;
111 #ifdef NETDATA_INTERNAL_CHECKS
112 if(unlikely(btotal != bavail + breserved_root + bused))
113 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);
116 // --------------------------------------------------------------------------
118 fsfilcnt_t favail = buff_statvfs.f_favail;
119 fsfilcnt_t ftotal = buff_statvfs.f_files;
120 fsfilcnt_t favail_root = buff_statvfs.f_ffree;
121 fsfilcnt_t freserved_root = favail_root - favail;
122 fsfilcnt_t fused = ftotal - favail_root;
124 #ifdef NETDATA_INTERNAL_CHECKS
125 if(unlikely(btotal != bavail + breserved_root + bused))
126 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);
129 // --------------------------------------------------------------------------
133 if(do_space == CONFIG_ONDEMAND_YES || (do_space == CONFIG_ONDEMAND_ONDEMAND && (bavail || breserved_root || bused))) {
134 st = rrdset_find_bytype("disk_space", disk);
136 char title[4096 + 1];
137 snprintfz(title, 4096, "Disk Space Usage for %s [%s]", family, mi->mount_source);
138 st = rrdset_create("disk_space", disk, NULL, family, "disk.space", title, "GB", 2023, update_every, RRDSET_TYPE_STACKED);
140 rrddim_add(st, "avail", NULL, bsize, 1024*1024*1024, RRDDIM_ABSOLUTE);
141 rrddim_add(st, "used" , NULL, bsize, 1024*1024*1024, RRDDIM_ABSOLUTE);
142 rrddim_add(st, "reserved_for_root", "reserved for root", bsize, 1024*1024*1024, RRDDIM_ABSOLUTE);
144 else rrdset_next(st);
146 rrddim_set(st, "avail", (collected_number)bavail);
147 rrddim_set(st, "used", (collected_number)bused);
148 rrddim_set(st, "reserved_for_root", (collected_number)breserved_root);
152 // --------------------------------------------------------------------------
154 if(do_inodes == CONFIG_ONDEMAND_YES || (do_inodes == CONFIG_ONDEMAND_ONDEMAND && (favail || freserved_root || fused))) {
155 st = rrdset_find_bytype("disk_inodes", disk);
157 char title[4096 + 1];
158 snprintfz(title, 4096, "Disk Files (inodes) Usage for %s [%s]", family, mi->mount_source);
159 st = rrdset_create("disk_inodes", disk, NULL, family, "disk.inodes", title, "Inodes", 2024, update_every, RRDSET_TYPE_STACKED);
161 rrddim_add(st, "avail", NULL, 1, 1, RRDDIM_ABSOLUTE);
162 rrddim_add(st, "used" , NULL, 1, 1, RRDDIM_ABSOLUTE);
163 rrddim_add(st, "reserved_for_root", "reserved for root", 1, 1, RRDDIM_ABSOLUTE);
165 else rrdset_next(st);
167 rrddim_set(st, "avail", (collected_number)favail);
168 rrddim_set(st, "used", (collected_number)fused);
169 rrddim_set(st, "reserved_for_root", (collected_number)freserved_root);
174 void *proc_diskspace_main(void *ptr) {
175 struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
177 info("DISKSPACE thread created with task id %d", gettid());
179 if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
180 error("Cannot set pthread cancel type to DEFERRED.");
182 if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
183 error("Cannot set pthread cancel state to ENABLE.");
185 int update_every = (int)config_get_number("plugin:proc:diskspace", "update every", rrd_update_every);
186 if(update_every < rrd_update_every)
187 update_every = rrd_update_every;
189 usec_t step = update_every * USEC_PER_SEC;
191 usec_t now = now_monotonic_usec();
192 usec_t next = now - (now % step) + step;
195 sleep_usec(next - now);
196 now = now_monotonic_usec();
199 if(unlikely(netdata_exit)) break;
201 // --------------------------------------------------------------------------
202 // this is smart enough not to reload it every time
206 // --------------------------------------------------------------------------
207 // disk space metrics
209 struct mountinfo *mi;
210 for(mi = disk_mountinfo_root; mi; mi = mi->next) {
212 if(unlikely(mi->flags &
213 (MOUNTINFO_IS_DUMMY | MOUNTINFO_IS_BIND | MOUNTINFO_IS_SAME_DEV | MOUNTINFO_NO_STAT |
214 MOUNTINFO_NO_SIZE | MOUNTINFO_READONLY)))
217 do_disk_space_stats(mi, update_every);
221 info("DISKSPACE thread exiting");
223 static_thread->enabled = 0;
224 static_thread->thread = NULL;