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sys_fs_cgroup.c
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// SPDX-License-Identifier: GPL-3.0-or-later
#include "sys_fs_cgroup.h"
#define PLUGIN_CGROUPS_NAME "cgroups.plugin"
#define PLUGIN_CGROUPS_MODULE_SYSTEMD_NAME "systemd"
#define PLUGIN_CGROUPS_MODULE_CGROUPS_NAME "/sys/fs/cgroup"
// ----------------------------------------------------------------------------
// cgroup globals
static long system_page_size = 4096; // system will be queried via sysconf() in configuration()
static int cgroup_enable_cpuacct_stat = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_cpuacct_usage = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_memory = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_detailed_memory = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_memory_failcnt = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_swap = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_io = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_ops = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_throttle_io = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_throttle_ops = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_merged_ops = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_queued_ops = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_systemd_services = CONFIG_BOOLEAN_YES;
static int cgroup_enable_systemd_services_detailed_memory = CONFIG_BOOLEAN_NO;
static int cgroup_used_memory_without_cache = CONFIG_BOOLEAN_YES;
static int cgroup_use_unified_cgroups = CONFIG_BOOLEAN_NO;
static int cgroup_unified_exist = CONFIG_BOOLEAN_AUTO;
static int cgroup_search_in_devices = 1;
static int cgroup_enable_new_cgroups_detected_at_runtime = 1;
static int cgroup_check_for_new_every = 10;
static int cgroup_update_every = 1;
static int cgroup_containers_chart_priority = NETDATA_CHART_PRIO_CGROUPS_CONTAINERS;
static int cgroup_recheck_zero_blkio_every_iterations = 10;
static int cgroup_recheck_zero_mem_failcnt_every_iterations = 10;
static int cgroup_recheck_zero_mem_detailed_every_iterations = 10;
static char *cgroup_cpuacct_base = NULL;
static char *cgroup_cpuset_base = NULL;
static char *cgroup_blkio_base = NULL;
static char *cgroup_memory_base = NULL;
static char *cgroup_devices_base = NULL;
static char *cgroup_unified_base = NULL;
static int cgroup_root_count = 0;
static int cgroup_root_max = 1000;
static int cgroup_max_depth = 0;
static SIMPLE_PATTERN *enabled_cgroup_patterns = NULL;
static SIMPLE_PATTERN *enabled_cgroup_paths = NULL;
static SIMPLE_PATTERN *enabled_cgroup_renames = NULL;
static SIMPLE_PATTERN *systemd_services_cgroups = NULL;
static char *cgroups_rename_script = NULL;
static char *cgroups_network_interface_script = NULL;
static int cgroups_check = 0;
static uint32_t Read_hash = 0;
static uint32_t Write_hash = 0;
static uint32_t user_hash = 0;
static uint32_t system_hash = 0;
void read_cgroup_plugin_configuration() {
system_page_size = sysconf(_SC_PAGESIZE);
Read_hash = simple_hash("Read");
Write_hash = simple_hash("Write");
user_hash = simple_hash("user");
system_hash = simple_hash("system");
cgroup_update_every = (int)config_get_number("plugin:cgroups", "update every", localhost->rrd_update_every);
if(cgroup_update_every < localhost->rrd_update_every)
cgroup_update_every = localhost->rrd_update_every;
cgroup_check_for_new_every = (int)config_get_number("plugin:cgroups", "check for new cgroups every", (long long)cgroup_check_for_new_every * (long long)cgroup_update_every);
if(cgroup_check_for_new_every < cgroup_update_every)
cgroup_check_for_new_every = cgroup_update_every;
cgroup_use_unified_cgroups = config_get_boolean_ondemand("plugin:cgroups", "use unified cgroups", cgroup_use_unified_cgroups);
cgroup_containers_chart_priority = (int)config_get_number("plugin:cgroups", "containers priority", cgroup_containers_chart_priority);
if(cgroup_containers_chart_priority < 1)
cgroup_containers_chart_priority = NETDATA_CHART_PRIO_CGROUPS_CONTAINERS;
cgroup_enable_cpuacct_stat = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct stat (total CPU)", cgroup_enable_cpuacct_stat);
cgroup_enable_cpuacct_usage = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct usage (per core CPU)", cgroup_enable_cpuacct_usage);
cgroup_enable_memory = config_get_boolean_ondemand("plugin:cgroups", "enable memory (used mem including cache)", cgroup_enable_memory);
cgroup_enable_detailed_memory = config_get_boolean_ondemand("plugin:cgroups", "enable detailed memory", cgroup_enable_detailed_memory);
cgroup_enable_memory_failcnt = config_get_boolean_ondemand("plugin:cgroups", "enable memory limits fail count", cgroup_enable_memory_failcnt);
cgroup_enable_swap = config_get_boolean_ondemand("plugin:cgroups", "enable swap memory", cgroup_enable_swap);
cgroup_enable_blkio_io = config_get_boolean_ondemand("plugin:cgroups", "enable blkio bandwidth", cgroup_enable_blkio_io);
cgroup_enable_blkio_ops = config_get_boolean_ondemand("plugin:cgroups", "enable blkio operations", cgroup_enable_blkio_ops);
cgroup_enable_blkio_throttle_io = config_get_boolean_ondemand("plugin:cgroups", "enable blkio throttle bandwidth", cgroup_enable_blkio_throttle_io);
cgroup_enable_blkio_throttle_ops = config_get_boolean_ondemand("plugin:cgroups", "enable blkio throttle operations", cgroup_enable_blkio_throttle_ops);
cgroup_enable_blkio_queued_ops = config_get_boolean_ondemand("plugin:cgroups", "enable blkio queued operations", cgroup_enable_blkio_queued_ops);
cgroup_enable_blkio_merged_ops = config_get_boolean_ondemand("plugin:cgroups", "enable blkio merged operations", cgroup_enable_blkio_merged_ops);
cgroup_recheck_zero_blkio_every_iterations = (int)config_get_number("plugin:cgroups", "recheck zero blkio every iterations", cgroup_recheck_zero_blkio_every_iterations);
cgroup_recheck_zero_mem_failcnt_every_iterations = (int)config_get_number("plugin:cgroups", "recheck zero memory failcnt every iterations", cgroup_recheck_zero_mem_failcnt_every_iterations);
cgroup_recheck_zero_mem_detailed_every_iterations = (int)config_get_number("plugin:cgroups", "recheck zero detailed memory every iterations", cgroup_recheck_zero_mem_detailed_every_iterations);
cgroup_enable_systemd_services = config_get_boolean("plugin:cgroups", "enable systemd services", cgroup_enable_systemd_services);
cgroup_enable_systemd_services_detailed_memory = config_get_boolean("plugin:cgroups", "enable systemd services detailed memory", cgroup_enable_systemd_services_detailed_memory);
cgroup_used_memory_without_cache = config_get_boolean("plugin:cgroups", "report used memory without cache", cgroup_used_memory_without_cache);
char filename[FILENAME_MAX + 1], *s;
struct mountinfo *mi, *root = mountinfo_read(0);
if(!cgroup_use_unified_cgroups) {
mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct");
if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct");
if(!mi) {
error("CGROUP: cannot find cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct");
s = "/sys/fs/cgroup/cpuacct";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", filename);
mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuset");
if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuset");
if(!mi) {
error("CGROUP: cannot find cpuset mountinfo. Assuming default: /sys/fs/cgroup/cpuset");
s = "/sys/fs/cgroup/cpuset";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
cgroup_cpuset_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuset", filename);
mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "blkio");
if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "blkio");
if(!mi) {
error("CGROUP: cannot find blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio");
s = "/sys/fs/cgroup/blkio";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
cgroup_blkio_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", filename);
mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "memory");
if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "memory");
if(!mi) {
error("CGROUP: cannot find memory mountinfo. Assuming default: /sys/fs/cgroup/memory");
s = "/sys/fs/cgroup/memory";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
cgroup_memory_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename);
mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "devices");
if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "devices");
if(!mi) {
error("CGROUP: cannot find devices mountinfo. Assuming default: /sys/fs/cgroup/devices");
s = "/sys/fs/cgroup/devices";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
cgroup_devices_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/devices", filename);
}
else {
//cgroup_enable_cpuacct_stat =
cgroup_enable_cpuacct_usage =
//cgroup_enable_memory =
//cgroup_enable_detailed_memory =
cgroup_enable_memory_failcnt =
//cgroup_enable_swap =
//cgroup_enable_blkio_io =
//cgroup_enable_blkio_ops =
cgroup_enable_blkio_throttle_io =
cgroup_enable_blkio_throttle_ops =
cgroup_enable_blkio_merged_ops =
cgroup_enable_blkio_queued_ops = CONFIG_BOOLEAN_NO;
cgroup_search_in_devices = 0;
cgroup_enable_systemd_services_detailed_memory = CONFIG_BOOLEAN_NO;
cgroup_used_memory_without_cache = CONFIG_BOOLEAN_NO; //unified cgroups use different values
//TODO: can there be more than 1 cgroup2 mount point?
mi = mountinfo_find_by_filesystem_super_option(root, "cgroup2", "rw"); //there is no cgroup2 specific super option - for now use 'rw' option
if(mi) debug(D_CGROUP, "found unified cgroup root using super options, with path: '%s'", mi->mount_point);
if(!mi) {
mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup2", "cgroup");
if(mi) debug(D_CGROUP, "found unified cgroup root using mountsource info, with path: '%s'", mi->mount_point);
}
if(!mi) {
error("CGROUP: cannot find cgroup2 mountinfo. Assuming default: /sys/fs/cgroup");
s = "/sys/fs/cgroup";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
cgroup_unified_base = config_get("plugin:cgroups", "path to unified cgroups", filename);
debug(D_CGROUP, "using cgroup root: '%s'", cgroup_unified_base);
}
cgroup_root_max = (int)config_get_number("plugin:cgroups", "max cgroups to allow", cgroup_root_max);
cgroup_max_depth = (int)config_get_number("plugin:cgroups", "max cgroups depth to monitor", cgroup_max_depth);
cgroup_enable_new_cgroups_detected_at_runtime = config_get_boolean("plugin:cgroups", "enable new cgroups detected at run time", cgroup_enable_new_cgroups_detected_at_runtime);
enabled_cgroup_patterns = simple_pattern_create(
config_get("plugin:cgroups", "enable by default cgroups matching",
// ----------------------------------------------------------------
" !*/init.scope " // ignore init.scope
" !/system.slice/run-*.scope " // ignore system.slice/run-XXXX.scope
" *.scope " // we need all other *.scope for sure
// ----------------------------------------------------------------
" /machine.slice/*.service " // #3367 systemd-nspawn
// ----------------------------------------------------------------
" !*/vcpu* " // libvirtd adds these sub-cgroups
" !*/emulator " // libvirtd adds these sub-cgroups
" !*.mount "
" !*.partition "
" !*.service "
" !*.socket "
" !*.slice "
" !*.swap "
" !*.user "
" !/ "
" !/docker "
" !/libvirt "
" !/lxc "
" !/lxc/*/* " // #1397 #2649
" !/machine "
" !/qemu "
" !/system "
" !/systemd "
" !/user "
" * " // enable anything else
), NULL, SIMPLE_PATTERN_EXACT);
enabled_cgroup_paths = simple_pattern_create(
config_get("plugin:cgroups", "search for cgroups in subpaths matching",
" !*/init.scope " // ignore init.scope
" !*-qemu " // #345
" !*.libvirt-qemu " // #3010
" !/init.scope "
" !/system "
" !/systemd "
" !/user "
" !/user.slice "
" !/lxc/*/* " // #2161 #2649
" * "
), NULL, SIMPLE_PATTERN_EXACT);
snprintfz(filename, FILENAME_MAX, "%s/cgroup-name.sh", netdata_configured_primary_plugins_dir);
cgroups_rename_script = config_get("plugin:cgroups", "script to get cgroup names", filename);
snprintfz(filename, FILENAME_MAX, "%s/cgroup-network", netdata_configured_primary_plugins_dir);
cgroups_network_interface_script = config_get("plugin:cgroups", "script to get cgroup network interfaces", filename);
enabled_cgroup_renames = simple_pattern_create(
config_get("plugin:cgroups", "run script to rename cgroups matching",
" !/ "
" !*.mount "
" !*.socket "
" !*.partition "
" /machine.slice/*.service " // #3367 systemd-nspawn
" !*.service "
" !*.slice "
" !*.swap "
" !*.user "
" !init.scope "
" !*.scope/vcpu* " // libvirtd adds these sub-cgroups
" !*.scope/emulator " // libvirtd adds these sub-cgroups
" *.scope "
" *docker* "
" *lxc* "
" *qemu* "
" *kubepods* " // #3396 kubernetes
" *.libvirt-qemu " // #3010
" * "
), NULL, SIMPLE_PATTERN_EXACT);
if(cgroup_enable_systemd_services) {
systemd_services_cgroups = simple_pattern_create(
config_get("plugin:cgroups", "cgroups to match as systemd services",
" !/system.slice/*/*.service "
" /system.slice/*.service "
), NULL, SIMPLE_PATTERN_EXACT);
}
mountinfo_free_all(root);
}
// ----------------------------------------------------------------------------
// cgroup objects
struct blkio {
int updated;
int enabled; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int delay_counter;
char *filename;
unsigned long long Read;
unsigned long long Write;
/*
unsigned long long Sync;
unsigned long long Async;
unsigned long long Total;
*/
};
// https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
struct memory {
ARL_BASE *arl_base;
ARL_ENTRY *arl_dirty;
ARL_ENTRY *arl_swap;
int updated_detailed;
int updated_usage_in_bytes;
int updated_msw_usage_in_bytes;
int updated_failcnt;
int enabled_detailed; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int enabled_usage_in_bytes; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int enabled_msw_usage_in_bytes; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int enabled_failcnt; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int delay_counter_detailed;
int delay_counter_failcnt;
char *filename_detailed;
char *filename_usage_in_bytes;
char *filename_msw_usage_in_bytes;
char *filename_failcnt;
int detailed_has_dirty;
int detailed_has_swap;
// detailed metrics
/*
unsigned long long cache;
unsigned long long rss;
unsigned long long rss_huge;
unsigned long long mapped_file;
unsigned long long writeback;
unsigned long long dirty;
unsigned long long swap;
unsigned long long pgpgin;
unsigned long long pgpgout;
unsigned long long pgfault;
unsigned long long pgmajfault;
unsigned long long inactive_anon;
unsigned long long active_anon;
unsigned long long inactive_file;
unsigned long long active_file;
unsigned long long unevictable;
unsigned long long hierarchical_memory_limit;
*/
//unified cgroups metrics
unsigned long long anon;
unsigned long long kernel_stack;
unsigned long long slab;
unsigned long long sock;
unsigned long long shmem;
unsigned long long anon_thp;
//unsigned long long file_writeback;
//unsigned long long file_dirty;
//unsigned long long file;
unsigned long long total_cache;
unsigned long long total_rss;
unsigned long long total_rss_huge;
unsigned long long total_mapped_file;
unsigned long long total_writeback;
unsigned long long total_dirty;
unsigned long long total_swap;
unsigned long long total_pgpgin;
unsigned long long total_pgpgout;
unsigned long long total_pgfault;
unsigned long long total_pgmajfault;
/*
unsigned long long total_inactive_anon;
unsigned long long total_active_anon;
unsigned long long total_inactive_file;
unsigned long long total_active_file;
unsigned long long total_unevictable;
*/
// single file metrics
unsigned long long usage_in_bytes;
unsigned long long msw_usage_in_bytes;
unsigned long long failcnt;
};
// https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
struct cpuacct_stat {
int updated;
int enabled; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
char *filename;
unsigned long long user;
unsigned long long system;
};
// https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
struct cpuacct_usage {
int updated;
int enabled; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
char *filename;
unsigned int cpus;
unsigned long long *cpu_percpu;
};
struct cgroup_network_interface {
const char *host_device;
const char *container_device;
struct cgroup_network_interface *next;
};
#define CGROUP_OPTIONS_DISABLED_DUPLICATE 0x00000001
#define CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE 0x00000002
#define CGROUP_OPTIONS_IS_UNIFIED 0x00000004
struct cgroup {
uint32_t options;
char available; // found in the filesystem
char enabled; // enabled in the config
char pending_renames;
char *id;
uint32_t hash;
char *chart_id;
uint32_t hash_chart;
char *chart_title;
struct cpuacct_stat cpuacct_stat;
struct cpuacct_usage cpuacct_usage;
struct memory memory;
struct blkio io_service_bytes; // bytes
struct blkio io_serviced; // operations
struct blkio throttle_io_service_bytes; // bytes
struct blkio throttle_io_serviced; // operations
struct blkio io_merged; // operations
struct blkio io_queued; // operations
struct cgroup_network_interface *interfaces;
// per cgroup charts
RRDSET *st_cpu;
RRDSET *st_cpu_limit;
RRDSET *st_cpu_per_core;
RRDSET *st_mem;
RRDSET *st_writeback;
RRDSET *st_mem_activity;
RRDSET *st_pgfaults;
RRDSET *st_mem_usage;
RRDSET *st_mem_usage_limit;
RRDSET *st_mem_failcnt;
RRDSET *st_io;
RRDSET *st_serviced_ops;
RRDSET *st_throttle_io;
RRDSET *st_throttle_serviced_ops;
RRDSET *st_queued_ops;
RRDSET *st_merged_ops;
// per cgroup chart variables
char *filename_cpuset_cpus;
unsigned long long cpuset_cpus;
char *filename_cpu_cfs_period;
unsigned long long cpu_cfs_period;
char *filename_cpu_cfs_quota;
unsigned long long cpu_cfs_quota;
RRDSETVAR *chart_var_cpu_limit;
calculated_number prev_cpu_usage;
char *filename_memory_limit;
unsigned long long memory_limit;
RRDSETVAR *chart_var_memory_limit;
char *filename_memoryswap_limit;
unsigned long long memoryswap_limit;
RRDSETVAR *chart_var_memoryswap_limit;
// services
RRDDIM *rd_cpu;
RRDDIM *rd_mem_usage;
RRDDIM *rd_mem_failcnt;
RRDDIM *rd_swap_usage;
RRDDIM *rd_mem_detailed_cache;
RRDDIM *rd_mem_detailed_rss;
RRDDIM *rd_mem_detailed_mapped;
RRDDIM *rd_mem_detailed_writeback;
RRDDIM *rd_mem_detailed_pgpgin;
RRDDIM *rd_mem_detailed_pgpgout;
RRDDIM *rd_mem_detailed_pgfault;
RRDDIM *rd_mem_detailed_pgmajfault;
RRDDIM *rd_io_service_bytes_read;
RRDDIM *rd_io_serviced_read;
RRDDIM *rd_throttle_io_read;
RRDDIM *rd_throttle_io_serviced_read;
RRDDIM *rd_io_queued_read;
RRDDIM *rd_io_merged_read;
RRDDIM *rd_io_service_bytes_write;
RRDDIM *rd_io_serviced_write;
RRDDIM *rd_throttle_io_write;
RRDDIM *rd_throttle_io_serviced_write;
RRDDIM *rd_io_queued_write;
RRDDIM *rd_io_merged_write;
struct cgroup *next;
} *cgroup_root = NULL;
// ----------------------------------------------------------------------------
// read values from /sys
static inline void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
static procfile *ff = NULL;
if(likely(cp->filename)) {
ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
if(unlikely(!ff)) {
cp->updated = 0;
cgroups_check = 1;
return;
}
ff = procfile_readall(ff);
if(unlikely(!ff)) {
cp->updated = 0;
cgroups_check = 1;
return;
}
unsigned long i, lines = procfile_lines(ff);
if(unlikely(lines < 1)) {
error("CGROUP: file '%s' should have 1+ lines.", cp->filename);
cp->updated = 0;
return;
}
for(i = 0; i < lines ; i++) {
char *s = procfile_lineword(ff, i, 0);
uint32_t hash = simple_hash(s);
if(unlikely(hash == user_hash && !strcmp(s, "user")))
cp->user = str2ull(procfile_lineword(ff, i, 1));
else if(unlikely(hash == system_hash && !strcmp(s, "system")))
cp->system = str2ull(procfile_lineword(ff, i, 1));
}
cp->updated = 1;
if(unlikely(cp->enabled == CONFIG_BOOLEAN_AUTO && (cp->user || cp->system)))
cp->enabled = CONFIG_BOOLEAN_YES;
}
}
static inline void cgroup2_read_cpuacct_stat(struct cpuacct_stat *cp) {
static procfile *ff = NULL;
if(likely(cp->filename)) {
ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
if(unlikely(!ff)) {
cp->updated = 0;
cgroups_check = 1;
return;
}
ff = procfile_readall(ff);
if(unlikely(!ff)) {
cp->updated = 0;
cgroups_check = 1;
return;
}
unsigned long lines = procfile_lines(ff);
if(unlikely(lines < 3)) {
error("CGROUP: file '%s' should have 3+ lines.", cp->filename);
cp->updated = 0;
return;
}
cp->user = str2ull(procfile_lineword(ff, 1, 1));
cp->system = str2ull(procfile_lineword(ff, 2, 1));
cp->updated = 1;
if(unlikely(cp->enabled == CONFIG_BOOLEAN_AUTO && (cp->user || cp->system)))
cp->enabled = CONFIG_BOOLEAN_YES;
}
}
static inline void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
static procfile *ff = NULL;
if(likely(ca->filename)) {
ff = procfile_reopen(ff, ca->filename, NULL, PROCFILE_FLAG_DEFAULT);
if(unlikely(!ff)) {
ca->updated = 0;
cgroups_check = 1;
return;
}
ff = procfile_readall(ff);
if(unlikely(!ff)) {
ca->updated = 0;
cgroups_check = 1;
return;
}
if(unlikely(procfile_lines(ff) < 1)) {
error("CGROUP: file '%s' should have 1+ lines but has %zu.", ca->filename, procfile_lines(ff));
ca->updated = 0;
return;
}
unsigned long i = procfile_linewords(ff, 0);
if(unlikely(i == 0)) {
ca->updated = 0;
return;
}
// we may have 1 more CPU reported
while(i > 0) {
char *s = procfile_lineword(ff, 0, i - 1);
if(!*s) i--;
else break;
}
if(unlikely(i != ca->cpus)) {
freez(ca->cpu_percpu);
ca->cpu_percpu = mallocz(sizeof(unsigned long long) * i);
ca->cpus = (unsigned int)i;
}
unsigned long long total = 0;
for(i = 0; i < ca->cpus ;i++) {
unsigned long long n = str2ull(procfile_lineword(ff, 0, i));
ca->cpu_percpu[i] = n;
total += n;
}
ca->updated = 1;
if(unlikely(ca->enabled == CONFIG_BOOLEAN_AUTO && total))
ca->enabled = CONFIG_BOOLEAN_YES;
}
}
static inline void cgroup_read_blkio(struct blkio *io) {
if(unlikely(io->enabled == CONFIG_BOOLEAN_AUTO && io->delay_counter > 0)) {
io->delay_counter--;
return;
}
if(likely(io->filename)) {
static procfile *ff = NULL;
ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
if(unlikely(!ff)) {
io->updated = 0;
cgroups_check = 1;
return;
}
ff = procfile_readall(ff);
if(unlikely(!ff)) {
io->updated = 0;
cgroups_check = 1;
return;
}
unsigned long i, lines = procfile_lines(ff);
if(unlikely(lines < 1)) {
error("CGROUP: file '%s' should have 1+ lines.", io->filename);
io->updated = 0;
return;
}
io->Read = 0;
io->Write = 0;
/*
io->Sync = 0;
io->Async = 0;
io->Total = 0;
*/
for(i = 0; i < lines ; i++) {
char *s = procfile_lineword(ff, i, 1);
uint32_t hash = simple_hash(s);
if(unlikely(hash == Read_hash && !strcmp(s, "Read")))
io->Read += str2ull(procfile_lineword(ff, i, 2));
else if(unlikely(hash == Write_hash && !strcmp(s, "Write")))
io->Write += str2ull(procfile_lineword(ff, i, 2));
/*
else if(unlikely(hash == Sync_hash && !strcmp(s, "Sync")))
io->Sync += str2ull(procfile_lineword(ff, i, 2));
else if(unlikely(hash == Async_hash && !strcmp(s, "Async")))
io->Async += str2ull(procfile_lineword(ff, i, 2));
else if(unlikely(hash == Total_hash && !strcmp(s, "Total")))
io->Total += str2ull(procfile_lineword(ff, i, 2));
*/
}
io->updated = 1;
if(unlikely(io->enabled == CONFIG_BOOLEAN_AUTO)) {
if(unlikely(io->Read || io->Write))
io->enabled = CONFIG_BOOLEAN_YES;
else
io->delay_counter = cgroup_recheck_zero_blkio_every_iterations;
}
}
}
static inline void cgroup2_read_blkio(struct blkio *io, unsigned int word_offset) {
if(unlikely(io->enabled == CONFIG_BOOLEAN_AUTO && io->delay_counter > 0)) {
io->delay_counter--;
return;
}
if(likely(io->filename)) {
static procfile *ff = NULL;
ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
if(unlikely(!ff)) {
io->updated = 0;
cgroups_check = 1;
return;
}
ff = procfile_readall(ff);
if(unlikely(!ff)) {
io->updated = 0;
cgroups_check = 1;
return;
}
unsigned long i, lines = procfile_lines(ff);
if (unlikely(lines < 1)) {
error("CGROUP: file '%s' should have 1+ lines.", io->filename);
io->updated = 0;
return;
}
io->Read = 0;
io->Write = 0;
for (i = 0; i < lines; i++) {
io->Read += str2ull(procfile_lineword(ff, i, 2 + word_offset));
io->Write += str2ull(procfile_lineword(ff, i, 4 + word_offset));
}
io->updated = 1;
if(unlikely(io->enabled == CONFIG_BOOLEAN_AUTO)) {
if(unlikely(io->Read || io->Write))
io->enabled = CONFIG_BOOLEAN_YES;
else
io->delay_counter = cgroup_recheck_zero_blkio_every_iterations;
}
}
}
static inline void cgroup_read_memory(struct memory *mem, char parent_cg_is_unified) {
static procfile *ff = NULL;
// read detailed ram usage
if(likely(mem->filename_detailed)) {
if(unlikely(mem->enabled_detailed == CONFIG_BOOLEAN_AUTO && mem->delay_counter_detailed > 0)) {
mem->delay_counter_detailed--;
goto memory_next;
}
ff = procfile_reopen(ff, mem->filename_detailed, NULL, PROCFILE_FLAG_DEFAULT);
if(unlikely(!ff)) {
mem->updated_detailed = 0;
cgroups_check = 1;
goto memory_next;
}
ff = procfile_readall(ff);
if(unlikely(!ff)) {
mem->updated_detailed = 0;
cgroups_check = 1;
goto memory_next;
}
unsigned long i, lines = procfile_lines(ff);
if(unlikely(lines < 1)) {
error("CGROUP: file '%s' should have 1+ lines.", mem->filename_detailed);
mem->updated_detailed = 0;
goto memory_next;
}
if(unlikely(!mem->arl_base)) {
if(parent_cg_is_unified == 0){
mem->arl_base = arl_create("cgroup/memory", NULL, 60);
arl_expect(mem->arl_base, "total_cache", &mem->total_cache);
arl_expect(mem->arl_base, "total_rss", &mem->total_rss);
arl_expect(mem->arl_base, "total_rss_huge", &mem->total_rss_huge);
arl_expect(mem->arl_base, "total_mapped_file", &mem->total_mapped_file);
arl_expect(mem->arl_base, "total_writeback", &mem->total_writeback);
mem->arl_dirty = arl_expect(mem->arl_base, "total_dirty", &mem->total_dirty);
mem->arl_swap = arl_expect(mem->arl_base, "total_swap", &mem->total_swap);
arl_expect(mem->arl_base, "total_pgpgin", &mem->total_pgpgin);
arl_expect(mem->arl_base, "total_pgpgout", &mem->total_pgpgout);
arl_expect(mem->arl_base, "total_pgfault", &mem->total_pgfault);
arl_expect(mem->arl_base, "total_pgmajfault", &mem->total_pgmajfault);
} else {
mem->arl_base = arl_create("cgroup/memory", NULL, 60);
arl_expect(mem->arl_base, "anon", &mem->anon);
arl_expect(mem->arl_base, "kernel_stack", &mem->kernel_stack);
arl_expect(mem->arl_base, "slab", &mem->slab);
arl_expect(mem->arl_base, "sock", &mem->sock);
arl_expect(mem->arl_base, "anon_thp", &mem->anon_thp);
arl_expect(mem->arl_base, "file", &mem->total_mapped_file);
arl_expect(mem->arl_base, "file_writeback", &mem->total_writeback);
mem->arl_dirty = arl_expect(mem->arl_base, "file_dirty", &mem->total_dirty);
arl_expect(mem->arl_base, "pgfault", &mem->total_pgfault);
arl_expect(mem->arl_base, "pgmajfault", &mem->total_pgmajfault);
}
}
arl_begin(mem->arl_base);
for(i = 0; i < lines ; i++) {
if(arl_check(mem->arl_base,
procfile_lineword(ff, i, 0),
procfile_lineword(ff, i, 1))) break;
}
if(unlikely(mem->arl_dirty->flags & ARL_ENTRY_FLAG_FOUND))
mem->detailed_has_dirty = 1;
if(unlikely(parent_cg_is_unified == 0 && mem->arl_swap->flags & ARL_ENTRY_FLAG_FOUND))
mem->detailed_has_swap = 1;
// fprintf(stderr, "READ: '%s', cache: %llu, rss: %llu, rss_huge: %llu, mapped_file: %llu, writeback: %llu, dirty: %llu, swap: %llu, pgpgin: %llu, pgpgout: %llu, pgfault: %llu, pgmajfault: %llu, inactive_anon: %llu, active_anon: %llu, inactive_file: %llu, active_file: %llu, unevictable: %llu, hierarchical_memory_limit: %llu, total_cache: %llu, total_rss: %llu, total_rss_huge: %llu, total_mapped_file: %llu, total_writeback: %llu, total_dirty: %llu, total_swap: %llu, total_pgpgin: %llu, total_pgpgout: %llu, total_pgfault: %llu, total_pgmajfault: %llu, total_inactive_anon: %llu, total_active_anon: %llu, total_inactive_file: %llu, total_active_file: %llu, total_unevictable: %llu\n", mem->filename, mem->cache, mem->rss, mem->rss_huge, mem->mapped_file, mem->writeback, mem->dirty, mem->swap, mem->pgpgin, mem->pgpgout, mem->pgfault, mem->pgmajfault, mem->inactive_anon, mem->active_anon, mem->inactive_file, mem->active_file, mem->unevictable, mem->hierarchical_memory_limit, mem->total_cache, mem->total_rss, mem->total_rss_huge, mem->total_mapped_file, mem->total_writeback, mem->total_dirty, mem->total_swap, mem->total_pgpgin, mem->total_pgpgout, mem->total_pgfault, mem->total_pgmajfault, mem->total_inactive_anon, mem->total_active_anon, mem->total_inactive_file, mem->total_active_file, mem->total_unevictable);
mem->updated_detailed = 1;
if(unlikely(mem->enabled_detailed == CONFIG_BOOLEAN_AUTO)) {
if(( (!parent_cg_is_unified) && ( mem->total_cache || mem->total_dirty || mem->total_rss || mem->total_rss_huge || mem->total_mapped_file || mem->total_writeback
|| mem->total_swap || mem->total_pgpgin || mem->total_pgpgout || mem->total_pgfault || mem->total_pgmajfault))
|| (parent_cg_is_unified && ( mem->anon || mem->total_dirty || mem->kernel_stack || mem->slab || mem->sock || mem->total_writeback
|| mem->anon_thp || mem->total_pgfault || mem->total_pgmajfault)))
mem->enabled_detailed = CONFIG_BOOLEAN_YES;
else
mem->delay_counter_detailed = cgroup_recheck_zero_mem_detailed_every_iterations;
}
}
memory_next:
// read usage_in_bytes
if(likely(mem->filename_usage_in_bytes)) {
mem->updated_usage_in_bytes = !read_single_number_file(mem->filename_usage_in_bytes, &mem->usage_in_bytes);
if(unlikely(mem->updated_usage_in_bytes && mem->enabled_usage_in_bytes == CONFIG_BOOLEAN_AUTO && mem->usage_in_bytes))
mem->enabled_usage_in_bytes = CONFIG_BOOLEAN_YES;
}
// read msw_usage_in_bytes
if(likely(mem->filename_msw_usage_in_bytes)) {
mem->updated_msw_usage_in_bytes = !read_single_number_file(mem->filename_msw_usage_in_bytes, &mem->msw_usage_in_bytes);
if(unlikely(mem->updated_msw_usage_in_bytes && mem->enabled_msw_usage_in_bytes == CONFIG_BOOLEAN_AUTO && mem->msw_usage_in_bytes))
mem->enabled_msw_usage_in_bytes = CONFIG_BOOLEAN_YES;
}
// read failcnt
if(likely(mem->filename_failcnt)) {
if(unlikely(mem->enabled_failcnt == CONFIG_BOOLEAN_AUTO && mem->delay_counter_failcnt > 0)) {
mem->updated_failcnt = 0;
mem->delay_counter_failcnt--;
}
else {
mem->updated_failcnt = !read_single_number_file(mem->filename_failcnt, &mem->failcnt);
if(unlikely(mem->updated_failcnt && mem->enabled_failcnt == CONFIG_BOOLEAN_AUTO)) {
if(unlikely(!mem->failcnt))
mem->delay_counter_failcnt = cgroup_recheck_zero_mem_failcnt_every_iterations;
else
mem->enabled_failcnt = CONFIG_BOOLEAN_YES;
}
}
}
}
static inline void cgroup_read(struct cgroup *cg) {
debug(D_CGROUP, "reading metrics for cgroups '%s'", cg->id);
if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
cgroup_read_memory(&cg->memory, 0);
cgroup_read_blkio(&cg->io_service_bytes);
cgroup_read_blkio(&cg->io_serviced);
cgroup_read_blkio(&cg->throttle_io_service_bytes);
cgroup_read_blkio(&cg->throttle_io_serviced);
cgroup_read_blkio(&cg->io_merged);
cgroup_read_blkio(&cg->io_queued);
}
else {
//TODO: io_service_bytes and io_serviced use same file merge into 1 function
cgroup2_read_blkio(&cg->io_service_bytes, 0);
cgroup2_read_blkio(&cg->io_serviced, 4);
cgroup2_read_cpuacct_stat(&cg->cpuacct_stat);
cgroup_read_memory(&cg->memory, 1);
}
}
static inline void read_all_cgroups(struct cgroup *root) {
debug(D_CGROUP, "reading metrics for all cgroups");
struct cgroup *cg;
for(cg = root; cg ; cg = cg->next)
if(cg->enabled && cg->available && !cg->pending_renames)
cgroup_read(cg);
}
// ----------------------------------------------------------------------------
// cgroup network interfaces
#define CGROUP_NETWORK_INTERFACE_MAX_LINE 2048
static inline void read_cgroup_network_interfaces(struct cgroup *cg) {
debug(D_CGROUP, "looking for the network interfaces of cgroup '%s' with chart id '%s' and title '%s'", cg->id, cg->chart_id, cg->chart_title);
pid_t cgroup_pid;
char command[CGROUP_NETWORK_INTERFACE_MAX_LINE + 1];
if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) {
snprintfz(command, CGROUP_NETWORK_INTERFACE_MAX_LINE, "exec %s --cgroup '%s%s'", cgroups_network_interface_script, cgroup_cpuacct_base, cg->id);
}
else {
snprintfz(command, CGROUP_NETWORK_INTERFACE_MAX_LINE, "exec %s --cgroup '%s%s'", cgroups_network_interface_script, cgroup_unified_base, cg->id);
}
debug(D_CGROUP, "executing command '%s' for cgroup '%s'", command, cg->id);
FILE *fp = mypopen(command, &cgroup_pid);
if(!fp) {
error("CGROUP: cannot popen(\"%s\", \"r\").", command);
return;
}
char *s;
char buffer[CGROUP_NETWORK_INTERFACE_MAX_LINE + 1];
while((s = fgets(buffer, CGROUP_NETWORK_INTERFACE_MAX_LINE, fp))) {
trim(s);
if(*s && *s != '\n') {
char *t = s;
while(*t && *t != ' ') t++;
if(*t == ' ') {
*t = '\0';
t++;
}
if(!*s) {
error("CGROUP: empty host interface returned by script");
continue;
}
if(!*t) {
error("CGROUP: empty guest interface returned by script");