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// SPDX-License-Identifier: GPL-3.0-or-later
#include "plugin_proc.h"
int do_proc_sys_fs_file_nr(int update_every, usec_t dt) {
(void)dt;
static procfile *ff = NULL;
if(unlikely(!ff)) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/sys/fs/file-nr");
ff = procfile_open(config_get("plugin:proc:/proc/sys/fs/file-nr", "filename to monitor", filename), "", PROCFILE_FLAG_DEFAULT);
if(unlikely(!ff)) return 1;
}
ff = procfile_readall(ff);
if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
uint64_t allocated = str2ull(procfile_lineword(ff, 0, 0), NULL);
uint64_t unused = str2ull(procfile_lineword(ff, 0, 1), NULL);
uint64_t max = str2ull(procfile_lineword(ff, 0, 2), NULL);
uint64_t used = allocated - unused;
static RRDSET *st_files = NULL;
static RRDDIM *rd_used = NULL;
if(unlikely(!st_files)) {
st_files = rrdset_create_localhost(
"system"
, "file_nr_used"
, NULL
, "files"
, NULL
, "File Descriptors"
, "files"
, PLUGIN_PROC_NAME
, "/proc/sys/fs/file-nr"
, NETDATA_CHART_PRIO_SYSTEM_FILES_NR
, update_every
, RRDSET_TYPE_LINE
);
rd_used = rrddim_add(st_files, "used", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
rrddim_set_by_pointer(st_files, rd_used, (collected_number )used);
rrdset_done(st_files);
static RRDSET *st_files_utilization = NULL;
static RRDDIM *rd_utilization = NULL;
if(unlikely(!st_files_utilization)) {
st_files_utilization = rrdset_create_localhost(
"system"
, "file_nr_utilization"
, NULL
, "files"
, NULL
, "File Descriptors Utilization"
, "percentage"
, PLUGIN_PROC_NAME
, "/proc/sys/fs/file-nr"
, NETDATA_CHART_PRIO_SYSTEM_FILES_NR + 1
, update_every
, RRDSET_TYPE_LINE
);
rd_utilization = rrddim_add(st_files_utilization, "utilization", NULL, 1, 10000, RRD_ALGORITHM_ABSOLUTE);
}
NETDATA_DOUBLE d_used = (NETDATA_DOUBLE)used;
NETDATA_DOUBLE d_max = (NETDATA_DOUBLE)max;
NETDATA_DOUBLE percent = d_used * 100.0 / d_max;
rrddim_set_by_pointer(st_files_utilization, rd_utilization, (collected_number)(percent * 10000));
rrdset_done(st_files_utilization);
return 0;
}
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