3 #define DELAULT_EXLUDED_PATHS "/proc/ /sys/ /var/run/user/ /run/user/"
5 static struct mountinfo *disk_mountinfo_root = NULL;
6 static int check_for_new_mountpoints_every = 15;
8 static inline void mountinfo_reload(int force) {
9 static time_t last_loaded = 0;
10 time_t now = now_realtime_sec();
12 if(force || now - last_loaded >= check_for_new_mountpoints_every) {
13 // mountinfo_free() can be called with NULL disk_mountinfo_root
14 mountinfo_free(disk_mountinfo_root);
16 // re-read mountinfo in case something changed
17 disk_mountinfo_root = mountinfo_read();
23 // Data to be stored in DICTIONARY mount_points used by do_disk_space_stats().
24 // This DICTIONARY is used to lookup the settings of the mount point on each iteration.
25 struct mount_point_metadata {
31 static inline void do_disk_space_stats(struct mountinfo *mi, int update_every) {
32 const char *family = mi->mount_point;
33 const char *disk = mi->persistent_id;
35 static DICTIONARY *mount_points = NULL;
36 static NETDATA_SIMPLE_PATTERN *excluded_mountpoints = NULL;
37 int do_space, do_inodes;
39 if(unlikely(!mount_points)) {
42 if(config_exists("plugin:proc:/proc/diskstats", "exclude space metrics on paths") && !config_exists("plugin:proc:diskspace", "exclude space metrics on paths")) {
43 // the config exists in the old section
44 s = config_get("plugin:proc:/proc/diskstats", "exclude space metrics on paths", DELAULT_EXLUDED_PATHS);
46 // set it to the new section
47 config_set("plugin:proc:diskspace", "exclude space metrics on paths", s);
50 s = config_get("plugin:proc:diskspace", "exclude space metrics on paths", DELAULT_EXLUDED_PATHS);
52 mount_points = dictionary_create(DICTIONARY_FLAG_SINGLE_THREADED);
53 excluded_mountpoints = netdata_simple_pattern_list_create(s, NETDATA_SIMPLE_PATTERN_MODE_PREFIX);
56 struct mount_point_metadata *m = dictionary_get(mount_points, mi->mount_point);
58 char var_name[4096 + 1];
59 snprintfz(var_name, 4096, "plugin:proc:diskspace:%s", mi->mount_point);
61 int def_space = config_get_boolean_ondemand("plugin:proc:diskspace", "space usage for all disks", CONFIG_ONDEMAND_ONDEMAND);
62 int def_inodes = config_get_boolean_ondemand("plugin:proc:diskspace", "inodes usage for all disks", CONFIG_ONDEMAND_ONDEMAND);
64 if(unlikely(netdata_simple_pattern_list_matches(excluded_mountpoints, mi->mount_point))) {
65 def_space = CONFIG_ONDEMAND_NO;
66 def_inodes = CONFIG_ONDEMAND_NO;
69 do_space = config_get_boolean_ondemand(var_name, "space usage", def_space);
70 do_inodes = config_get_boolean_ondemand(var_name, "inodes usage", def_inodes);
72 struct mount_point_metadata mp = {
74 .do_inodes = do_inodes,
75 .update_every = rrd_update_every
78 dictionary_set(mount_points, mi->mount_point, &mp, sizeof(struct mount_point_metadata));
81 do_space = m->do_space;
82 do_inodes = m->do_inodes;
83 update_every = m->update_every;
86 if(unlikely(do_space == CONFIG_ONDEMAND_NO && do_inodes == CONFIG_ONDEMAND_NO))
89 struct statvfs buff_statvfs;
90 if (statvfs(mi->mount_point, &buff_statvfs) < 0) {
91 error("Failed statvfs() for '%s' (disk '%s')", mi->mount_point, disk);
95 // taken from get_fs_usage() found in coreutils
96 unsigned long bsize = (buff_statvfs.f_frsize) ? buff_statvfs.f_frsize : buff_statvfs.f_bsize;
98 fsblkcnt_t bavail = buff_statvfs.f_bavail;
99 fsblkcnt_t btotal = buff_statvfs.f_blocks;
100 fsblkcnt_t bavail_root = buff_statvfs.f_bfree;
101 fsblkcnt_t breserved_root = bavail_root - bavail;
103 if(likely(btotal >= bavail_root))
104 bused = btotal - bavail_root;
106 bused = bavail_root - btotal;
108 #ifdef NETDATA_INTERNAL_CHECKS
109 if(unlikely(btotal != bavail + breserved_root + bused))
110 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);
113 // --------------------------------------------------------------------------
115 fsfilcnt_t favail = buff_statvfs.f_favail;
116 fsfilcnt_t ftotal = buff_statvfs.f_files;
117 fsfilcnt_t favail_root = buff_statvfs.f_ffree;
118 fsfilcnt_t freserved_root = favail_root - favail;
119 fsfilcnt_t fused = ftotal - favail_root;
121 #ifdef NETDATA_INTERNAL_CHECKS
122 if(unlikely(btotal != bavail + breserved_root + bused))
123 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);
126 // --------------------------------------------------------------------------
130 if(do_space == CONFIG_ONDEMAND_YES || (do_space == CONFIG_ONDEMAND_ONDEMAND && (bavail || breserved_root || bused))) {
131 st = rrdset_find_bytype("disk_space", disk);
133 char title[4096 + 1];
134 snprintfz(title, 4096, "Disk Space Usage for %s [%s]", family, mi->mount_source);
135 st = rrdset_create("disk_space", disk, NULL, family, "disk.space", title, "GB", 2023, update_every, RRDSET_TYPE_STACKED);
137 rrddim_add(st, "avail", NULL, bsize, 1024*1024*1024, RRDDIM_ABSOLUTE);
138 rrddim_add(st, "used" , NULL, bsize, 1024*1024*1024, RRDDIM_ABSOLUTE);
139 rrddim_add(st, "reserved_for_root", "reserved for root", bsize, 1024*1024*1024, RRDDIM_ABSOLUTE);
141 else rrdset_next(st);
143 rrddim_set(st, "avail", (collected_number)bavail);
144 rrddim_set(st, "used", (collected_number)bused);
145 rrddim_set(st, "reserved_for_root", (collected_number)breserved_root);
149 // --------------------------------------------------------------------------
151 if(do_inodes == CONFIG_ONDEMAND_YES || (do_inodes == CONFIG_ONDEMAND_ONDEMAND && (favail || freserved_root || fused))) {
152 st = rrdset_find_bytype("disk_inodes", disk);
154 char title[4096 + 1];
155 snprintfz(title, 4096, "Disk Files (inodes) Usage for %s [%s]", family, mi->mount_source);
156 st = rrdset_create("disk_inodes", disk, NULL, family, "disk.inodes", title, "Inodes", 2024, update_every, RRDSET_TYPE_STACKED);
158 rrddim_add(st, "avail", NULL, 1, 1, RRDDIM_ABSOLUTE);
159 rrddim_add(st, "used" , NULL, 1, 1, RRDDIM_ABSOLUTE);
160 rrddim_add(st, "reserved_for_root", "reserved for root", 1, 1, RRDDIM_ABSOLUTE);
162 else rrdset_next(st);
164 rrddim_set(st, "avail", (collected_number)favail);
165 rrddim_set(st, "used", (collected_number)fused);
166 rrddim_set(st, "reserved_for_root", (collected_number)freserved_root);
171 void *proc_diskspace_main(void *ptr) {
172 struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
174 info("DISKSPACE thread created with task id %d", gettid());
176 if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
177 error("Cannot set pthread cancel type to DEFERRED.");
179 if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
180 error("Cannot set pthread cancel state to ENABLE.");
182 int update_every = (int)config_get_number("plugin:proc:diskspace", "update every", rrd_update_every);
183 if(update_every < rrd_update_every)
184 update_every = rrd_update_every;
186 check_for_new_mountpoints_every = (int)config_get_number("plugin:proc:diskspace", "check for new mount points every", check_for_new_mountpoints_every);
187 if(check_for_new_mountpoints_every < update_every)
188 check_for_new_mountpoints_every = update_every;
190 usec_t step = update_every * USEC_PER_SEC;
192 usec_t now = now_monotonic_usec();
193 usec_t next = now - (now % step) + step;
196 sleep_usec(next - now);
197 now = now_monotonic_usec();
200 if(unlikely(netdata_exit)) break;
202 // --------------------------------------------------------------------------
203 // this is smart enough not to reload it every time
207 // --------------------------------------------------------------------------
208 // disk space metrics
210 struct mountinfo *mi;
211 for(mi = disk_mountinfo_root; mi; mi = mi->next) {
213 if(unlikely(mi->flags &
214 (MOUNTINFO_IS_DUMMY | MOUNTINFO_IS_BIND | MOUNTINFO_IS_SAME_DEV | MOUNTINFO_NO_STAT |
215 MOUNTINFO_NO_SIZE | MOUNTINFO_READONLY)))
218 do_disk_space_stats(mi, update_every);
222 info("DISKSPACE thread exiting");
224 static_thread->enabled = 0;
225 static_thread->thread = NULL;