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proc_net_sockstat.c
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proc_net_sockstat.c
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// SPDX-License-Identifier: GPL-3.0-or-later
#include "plugin_proc.h"
#define PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME "/proc/net/sockstat"
static struct proc_net_sockstat {
kernel_uint_t sockets_used;
kernel_uint_t tcp_inuse;
kernel_uint_t tcp_orphan;
kernel_uint_t tcp_tw;
kernel_uint_t tcp_alloc;
kernel_uint_t tcp_mem;
kernel_uint_t udp_inuse;
kernel_uint_t udp_mem;
kernel_uint_t udplite_inuse;
kernel_uint_t raw_inuse;
kernel_uint_t frag_inuse;
kernel_uint_t frag_memory;
} sockstat_root = { 0 };
static int read_tcp_mem(void) {
static char *filename = NULL;
static RRDVAR *tcp_mem_low_threshold = NULL,
*tcp_mem_pressure_threshold = NULL,
*tcp_mem_high_threshold = NULL;
if(unlikely(!tcp_mem_low_threshold)) {
tcp_mem_low_threshold = rrdvar_custom_host_variable_create(localhost, "tcp_mem_low");
tcp_mem_pressure_threshold = rrdvar_custom_host_variable_create(localhost, "tcp_mem_pressure");
tcp_mem_high_threshold = rrdvar_custom_host_variable_create(localhost, "tcp_mem_high");
}
if(unlikely(!filename)) {
char buffer[FILENAME_MAX + 1];
snprintfz(buffer, FILENAME_MAX, "%s/proc/sys/net/ipv4/tcp_mem", netdata_configured_host_prefix);
filename = strdupz(buffer);
}
char buffer[200 + 1], *start, *end;
if(read_file(filename, buffer, 200) != 0) return 1;
buffer[200] = '\0';
unsigned long long low = 0, pressure = 0, high = 0;
start = buffer;
low = strtoull(start, &end, 10);
start = end;
pressure = strtoull(start, &end, 10);
start = end;
high = strtoull(start, &end, 10);
// fprintf(stderr, "TCP MEM low = %llu, pressure = %llu, high = %llu\n", low, pressure, high);
rrdvar_custom_host_variable_set(localhost, tcp_mem_low_threshold, low * sysconf(_SC_PAGESIZE) / 1024.0);
rrdvar_custom_host_variable_set(localhost, tcp_mem_pressure_threshold, pressure * sysconf(_SC_PAGESIZE) / 1024.0);
rrdvar_custom_host_variable_set(localhost, tcp_mem_high_threshold, high * sysconf(_SC_PAGESIZE) / 1024.0);
return 0;
}
static kernel_uint_t read_tcp_max_orphans(void) {
static char *filename = NULL;
static RRDVAR *tcp_max_orphans_var = NULL;
if(unlikely(!filename)) {
char buffer[FILENAME_MAX + 1];
snprintfz(buffer, FILENAME_MAX, "%s/proc/sys/net/ipv4/tcp_max_orphans", netdata_configured_host_prefix);
filename = strdupz(buffer);
}
unsigned long long tcp_max_orphans = 0;
if(read_single_number_file(filename, &tcp_max_orphans) == 0) {
if(unlikely(!tcp_max_orphans_var))
tcp_max_orphans_var = rrdvar_custom_host_variable_create(localhost, "tcp_max_orphans");
rrdvar_custom_host_variable_set(localhost, tcp_max_orphans_var, tcp_max_orphans);
return tcp_max_orphans;
}
return 0;
}
int do_proc_net_sockstat(int update_every, usec_t dt) {
(void)dt;
static procfile *ff = NULL;
static uint32_t hash_sockets = 0,
hash_raw = 0,
hash_frag = 0,
hash_tcp = 0,
hash_udp = 0,
hash_udplite = 0;
static long long update_constants_every = 60, update_constants_count = 0;
static ARL_BASE *arl_sockets = NULL;
static ARL_BASE *arl_tcp = NULL;
static ARL_BASE *arl_udp = NULL;
static ARL_BASE *arl_udplite = NULL;
static ARL_BASE *arl_raw = NULL;
static ARL_BASE *arl_frag = NULL;
static int do_sockets = -1, do_tcp_sockets = -1, do_tcp_mem = -1, do_udp_sockets = -1, do_udp_mem = -1, do_udplite_sockets = -1, do_raw_sockets = -1, do_frag_sockets = -1, do_frag_mem = -1;
static char *keys[7] = { NULL };
static uint32_t hashes[7] = { 0 };
static ARL_BASE *bases[7] = { NULL };
if(unlikely(!arl_sockets)) {
do_sockets = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 sockets", CONFIG_BOOLEAN_AUTO);
do_tcp_sockets = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 TCP sockets", CONFIG_BOOLEAN_AUTO);
do_tcp_mem = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 TCP memory", CONFIG_BOOLEAN_AUTO);
do_udp_sockets = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 UDP sockets", CONFIG_BOOLEAN_AUTO);
do_udp_mem = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 UDP memory", CONFIG_BOOLEAN_AUTO);
do_udplite_sockets = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 UDPLITE sockets", CONFIG_BOOLEAN_AUTO);
do_raw_sockets = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 RAW sockets", CONFIG_BOOLEAN_AUTO);
do_frag_sockets = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 FRAG sockets", CONFIG_BOOLEAN_AUTO);
do_frag_mem = config_get_boolean_ondemand("plugin:proc:/proc/net/sockstat", "ipv4 FRAG memory", CONFIG_BOOLEAN_AUTO);
update_constants_every = config_get_number("plugin:proc:/proc/net/sockstat", "update constants every", update_constants_every);
update_constants_count = update_constants_every;
arl_sockets = arl_create("sockstat/sockets", arl_callback_str2kernel_uint_t, 60);
arl_expect(arl_sockets, "used", &sockstat_root.sockets_used);
arl_tcp = arl_create("sockstat/TCP", arl_callback_str2kernel_uint_t, 60);
arl_expect(arl_tcp, "inuse", &sockstat_root.tcp_inuse);
arl_expect(arl_tcp, "orphan", &sockstat_root.tcp_orphan);
arl_expect(arl_tcp, "tw", &sockstat_root.tcp_tw);
arl_expect(arl_tcp, "alloc", &sockstat_root.tcp_alloc);
arl_expect(arl_tcp, "mem", &sockstat_root.tcp_mem);
arl_udp = arl_create("sockstat/UDP", arl_callback_str2kernel_uint_t, 60);
arl_expect(arl_udp, "inuse", &sockstat_root.udp_inuse);
arl_expect(arl_udp, "mem", &sockstat_root.udp_mem);
arl_udplite = arl_create("sockstat/UDPLITE", arl_callback_str2kernel_uint_t, 60);
arl_expect(arl_udplite, "inuse", &sockstat_root.udplite_inuse);
arl_raw = arl_create("sockstat/RAW", arl_callback_str2kernel_uint_t, 60);
arl_expect(arl_raw, "inuse", &sockstat_root.raw_inuse);
arl_frag = arl_create("sockstat/FRAG", arl_callback_str2kernel_uint_t, 60);
arl_expect(arl_frag, "inuse", &sockstat_root.frag_inuse);
arl_expect(arl_frag, "memory", &sockstat_root.frag_memory);
hash_sockets = simple_hash("sockets");
hash_tcp = simple_hash("TCP");
hash_udp = simple_hash("UDP");
hash_udplite = simple_hash("UDPLITE");
hash_raw = simple_hash("RAW");
hash_frag = simple_hash("FRAG");
keys[0] = "sockets"; hashes[0] = hash_sockets; bases[0] = arl_sockets;
keys[1] = "TCP"; hashes[1] = hash_tcp; bases[1] = arl_tcp;
keys[2] = "UDP"; hashes[2] = hash_udp; bases[2] = arl_udp;
keys[3] = "UDPLITE"; hashes[3] = hash_udplite; bases[3] = arl_udplite;
keys[4] = "RAW"; hashes[4] = hash_raw; bases[4] = arl_raw;
keys[5] = "FRAG"; hashes[5] = hash_frag; bases[5] = arl_frag;
keys[6] = NULL; // terminator
}
update_constants_count += update_every;
if(unlikely(update_constants_count > update_constants_every)) {
read_tcp_max_orphans();
read_tcp_mem();
update_constants_count = 0;
}
if(unlikely(!ff)) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/net/sockstat");
ff = procfile_open(config_get("plugin:proc:/proc/net/sockstat", "filename to monitor", filename), " \t:", 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
size_t lines = procfile_lines(ff), l;
for(l = 0; l < lines ;l++) {
size_t words = procfile_linewords(ff, l);
char *key = procfile_lineword(ff, l, 0);
uint32_t hash = simple_hash(key);
int k;
for(k = 0; keys[k] ; k++) {
if(unlikely(hash == hashes[k] && strcmp(key, keys[k]) == 0)) {
// fprintf(stderr, "KEY: '%s', l=%zu, w=1, words=%zu\n", key, l, words);
ARL_BASE *arl = bases[k];
arl_begin(arl);
size_t w = 1;
while(w + 1 < words) {
char *name = procfile_lineword(ff, l, w); w++;
char *value = procfile_lineword(ff, l, w); w++;
// fprintf(stderr, " > NAME '%s', VALUE '%s', l=%zu, w=%zu, words=%zu\n", name, value, l, w, words);
if(unlikely(arl_check(arl, name, value) != 0))
break;
}
break;
}
}
}
// ------------------------------------------------------------------------
if(do_sockets == CONFIG_BOOLEAN_YES || (do_sockets == CONFIG_BOOLEAN_AUTO && sockstat_root.sockets_used)) {
do_sockets = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_used = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_sockets"
, NULL
, "sockets"
, NULL
, "IPv4 Sockets Used"
, "sockets"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_SOCKETS
, update_every
, RRDSET_TYPE_LINE
);
rd_used = rrddim_add(st, "used", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_used, (collected_number)sockstat_root.sockets_used);
rrdset_done(st);
}
// ------------------------------------------------------------------------
if(do_tcp_sockets == CONFIG_BOOLEAN_YES || (do_tcp_sockets == CONFIG_BOOLEAN_AUTO && (sockstat_root.tcp_inuse || sockstat_root.tcp_orphan || sockstat_root.tcp_tw || sockstat_root.tcp_alloc))) {
do_tcp_sockets = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_inuse = NULL,
*rd_orphan = NULL,
*rd_timewait = NULL,
*rd_alloc = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_tcp_sockets"
, NULL
, "tcp"
, NULL
, "IPv4 TCP Sockets"
, "sockets"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_TCP_SOCKETS
, update_every
, RRDSET_TYPE_LINE
);
rd_alloc = rrddim_add(st, "alloc", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
rd_orphan = rrddim_add(st, "orphan", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
rd_inuse = rrddim_add(st, "inuse", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
rd_timewait = rrddim_add(st, "timewait", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_inuse, (collected_number)sockstat_root.tcp_inuse);
rrddim_set_by_pointer(st, rd_orphan, (collected_number)sockstat_root.tcp_orphan);
rrddim_set_by_pointer(st, rd_timewait, (collected_number)sockstat_root.tcp_tw);
rrddim_set_by_pointer(st, rd_alloc, (collected_number)sockstat_root.tcp_alloc);
rrdset_done(st);
}
// ------------------------------------------------------------------------
if(do_tcp_mem == CONFIG_BOOLEAN_YES || (do_tcp_mem == CONFIG_BOOLEAN_AUTO && sockstat_root.tcp_mem)) {
do_tcp_mem = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_mem = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_tcp_mem"
, NULL
, "tcp"
, NULL
, "IPv4 TCP Sockets Memory"
, "KiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_TCP_MEM
, update_every
, RRDSET_TYPE_AREA
);
rd_mem = rrddim_add(st, "mem", NULL, sysconf(_SC_PAGESIZE), 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_mem, (collected_number)sockstat_root.tcp_mem);
rrdset_done(st);
}
// ------------------------------------------------------------------------
if(do_udp_sockets == CONFIG_BOOLEAN_YES || (do_udp_sockets == CONFIG_BOOLEAN_AUTO && sockstat_root.udp_inuse)) {
do_udp_sockets = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_inuse = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_udp_sockets"
, NULL
, "udp"
, NULL
, "IPv4 UDP Sockets"
, "sockets"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_UDP
, update_every
, RRDSET_TYPE_LINE
);
rd_inuse = rrddim_add(st, "inuse", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_inuse, (collected_number)sockstat_root.udp_inuse);
rrdset_done(st);
}
// ------------------------------------------------------------------------
if(do_udp_mem == CONFIG_BOOLEAN_YES || (do_udp_mem == CONFIG_BOOLEAN_AUTO && sockstat_root.udp_mem)) {
do_udp_mem = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_mem = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_udp_mem"
, NULL
, "udp"
, NULL
, "IPv4 UDP Sockets Memory"
, "KiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_UDP_MEM
, update_every
, RRDSET_TYPE_AREA
);
rd_mem = rrddim_add(st, "mem", NULL, sysconf(_SC_PAGESIZE), 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_mem, (collected_number)sockstat_root.udp_mem);
rrdset_done(st);
}
// ------------------------------------------------------------------------
if(do_udplite_sockets == CONFIG_BOOLEAN_YES || (do_udplite_sockets == CONFIG_BOOLEAN_AUTO && sockstat_root.udplite_inuse)) {
do_udplite_sockets = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_inuse = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_udplite_sockets"
, NULL
, "udplite"
, NULL
, "IPv4 UDPLITE Sockets"
, "sockets"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_UDPLITE
, update_every
, RRDSET_TYPE_LINE
);
rd_inuse = rrddim_add(st, "inuse", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_inuse, (collected_number)sockstat_root.udplite_inuse);
rrdset_done(st);
}
// ------------------------------------------------------------------------
if(do_raw_sockets == CONFIG_BOOLEAN_YES || (do_raw_sockets == CONFIG_BOOLEAN_AUTO && sockstat_root.raw_inuse)) {
do_raw_sockets = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_inuse = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_raw_sockets"
, NULL
, "raw"
, NULL
, "IPv4 RAW Sockets"
, "sockets"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_RAW
, update_every
, RRDSET_TYPE_LINE
);
rd_inuse = rrddim_add(st, "inuse", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_inuse, (collected_number)sockstat_root.raw_inuse);
rrdset_done(st);
}
// ------------------------------------------------------------------------
if(do_frag_sockets == CONFIG_BOOLEAN_YES || (do_frag_sockets == CONFIG_BOOLEAN_AUTO && sockstat_root.frag_inuse)) {
do_frag_sockets = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_inuse = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_frag_sockets"
, NULL
, "fragments"
, NULL
, "IPv4 FRAG Sockets"
, "fragments"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_FRAGMENTS
, update_every
, RRDSET_TYPE_LINE
);
rd_inuse = rrddim_add(st, "inuse", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_inuse, (collected_number)sockstat_root.frag_inuse);
rrdset_done(st);
}
// ------------------------------------------------------------------------
if(do_frag_mem == CONFIG_BOOLEAN_YES || (do_frag_mem == CONFIG_BOOLEAN_AUTO && sockstat_root.frag_memory)) {
do_frag_mem = CONFIG_BOOLEAN_YES;
static RRDSET *st = NULL;
static RRDDIM *rd_mem = NULL;
if(unlikely(!st)) {
st = rrdset_create_localhost(
"ipv4"
, "sockstat_frag_mem"
, NULL
, "fragments"
, NULL
, "IPv4 FRAG Sockets Memory"
, "KiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_NET_SOCKSTAT_NAME
, NETDATA_CHART_PRIO_IPV4_FRAGMENTS_MEM
, update_every
, RRDSET_TYPE_AREA
);
rd_mem = rrddim_add(st, "mem", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set_by_pointer(st, rd_mem, (collected_number)sockstat_root.frag_memory);
rrdset_done(st);
}
return 0;
}