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/*
* Copyright (c) 2010-2012 Red Hat, Inc.
*
* All rights reserved.
*
* Author: Angus Salkeld <asalkeld@redhat.com>
*
* This software licensed under BSD license, the text of which follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the MontaVista Software, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <unistd.h>
#include <statgrab.h>
#include <corosync/corotypes.h>
#include <corosync/corodefs.h>
#include <corosync/coroapi.h>
#include <qb/qblist.h>
#include <corosync/logsys.h>
#include <corosync/icmap.h>
#include "fsm.h"
#include "service.h"
LOGSYS_DECLARE_SUBSYS ("MON");
/*
* Service Interfaces required by service_message_handler struct
*/
static char *mon_exec_init_fn (struct corosync_api_v1 *corosync_api);
static struct corosync_api_v1 *api;
#define MON_DEFAULT_PERIOD 3000
#define MON_MIN_PERIOD 500
#define MON_MAX_PERIOD (120 * CS_TIME_MS_IN_SEC)
struct corosync_service_engine mon_service_engine = {
.name = "corosync resource monitoring service",
.id = MON_SERVICE,
.priority = 1,
.private_data_size = 0,
.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED,
.lib_init_fn = NULL,
.lib_exit_fn = NULL,
.lib_engine = NULL,
.lib_engine_count = 0,
.exec_engine = NULL,
.exec_engine_count = 0,
.confchg_fn = NULL,
.exec_init_fn = mon_exec_init_fn,
.exec_dump_fn = NULL
};
static QB_LIST_DECLARE (confchg_notify);
struct resource_instance {
const char *icmap_path;
const char *name;
corosync_timer_handle_t timer_handle;
void (*update_stats_fn) (void *data);
struct cs_fsm fsm;
uint64_t period;
icmap_value_types_t max_type;
union {
int32_t int32;
double dbl;
} max;
};
static void mem_update_stats_fn (void *data);
static void load_update_stats_fn (void *data);
static struct resource_instance memory_used_inst = {
.name = "memory_used",
.icmap_path = "resources.system.memory_used.",
.update_stats_fn = mem_update_stats_fn,
.max_type = ICMAP_VALUETYPE_INT32,
.max.int32 = INT32_MAX,
.period = MON_DEFAULT_PERIOD,
};
static struct resource_instance load_15min_inst = {
.name = "load_15min",
.icmap_path = "resources.system.load_15min.",
.update_stats_fn = load_update_stats_fn,
.max_type = ICMAP_VALUETYPE_DOUBLE,
.max.dbl = INT32_MAX,
.period = MON_DEFAULT_PERIOD,
};
/*
* F S M
*/
static void mon_config_changed (struct cs_fsm* fsm, int32_t event, void * data);
static void mon_resource_failed (struct cs_fsm* fsm, int32_t event, void * data);
const char * mon_running_str = "running";
const char * mon_failed_str = "failed";
const char * mon_failure_str = "failure";
const char * mon_stopped_str = "stopped";
const char * mon_config_changed_str = "config_changed";
enum mon_resource_state {
MON_S_STOPPED,
MON_S_RUNNING,
MON_S_FAILED
};
enum mon_resource_event {
MON_E_CONFIG_CHANGED,
MON_E_FAILURE
};
struct cs_fsm_entry mon_fsm_table[] = {
{ MON_S_STOPPED, MON_E_CONFIG_CHANGED, mon_config_changed, {MON_S_STOPPED, MON_S_RUNNING, -1} },
{ MON_S_STOPPED, MON_E_FAILURE, NULL, {-1} },
{ MON_S_RUNNING, MON_E_CONFIG_CHANGED, mon_config_changed, {MON_S_RUNNING, MON_S_STOPPED, -1} },
{ MON_S_RUNNING, MON_E_FAILURE, mon_resource_failed, {MON_S_FAILED, -1} },
{ MON_S_FAILED, MON_E_CONFIG_CHANGED, mon_config_changed, {MON_S_RUNNING, MON_S_STOPPED, -1} },
{ MON_S_FAILED, MON_E_FAILURE, NULL, {-1} },
};
struct corosync_service_engine *mon_get_service_engine_ver0 (void)
{
return (&mon_service_engine);
}
static const char * mon_res_state_to_str(struct cs_fsm* fsm,
int32_t state)
{
switch (state) {
case MON_S_STOPPED:
return mon_stopped_str;
break;
case MON_S_RUNNING:
return mon_running_str;
break;
case MON_S_FAILED:
return mon_failed_str;
break;
}
return NULL;
}
static const char * mon_res_event_to_str(struct cs_fsm* fsm,
int32_t event)
{
switch (event) {
case MON_E_CONFIG_CHANGED:
return mon_config_changed_str;
break;
case MON_E_FAILURE:
return mon_failure_str;
break;
}
return NULL;
}
static void mon_fsm_cb (struct cs_fsm *fsm, int cb_event, int32_t curr_state,
int32_t next_state, int32_t fsm_event, void *data)
{
switch (cb_event) {
case CS_FSM_CB_EVENT_PROCESS_NF:
log_printf (LOGSYS_LEVEL_ERROR, "Fsm:%s could not find event \"%s\" in state \"%s\"",
fsm->name, fsm->event_to_str(fsm, fsm_event), fsm->state_to_str(fsm, curr_state));
corosync_exit_error(COROSYNC_DONE_FATAL_ERR);
break;
case CS_FSM_CB_EVENT_STATE_SET:
log_printf (LOGSYS_LEVEL_INFO, "Fsm:%s event \"%s\", state \"%s\" --> \"%s\"",
fsm->name,
fsm->event_to_str(fsm, fsm_event),
fsm->state_to_str(fsm, fsm->table[fsm->curr_entry].curr_state),
fsm->state_to_str(fsm, next_state));
break;
case CS_FSM_CB_EVENT_STATE_SET_NF:
log_printf (LOGSYS_LEVEL_CRIT, "Fsm:%s Can't change state from \"%s\" to \"%s\" (event was \"%s\")",
fsm->name,
fsm->state_to_str(fsm, fsm->table[fsm->curr_entry].curr_state),
fsm->state_to_str(fsm, next_state),
fsm->event_to_str(fsm, fsm_event));
corosync_exit_error(COROSYNC_DONE_FATAL_ERR);
break;
default:
log_printf (LOGSYS_LEVEL_CRIT, "Fsm: Can't find callback event!");
corosync_exit_error(COROSYNC_DONE_FATAL_ERR);
break;
}
}
static void mon_fsm_state_set (struct cs_fsm* fsm,
enum mon_resource_state next_state, struct resource_instance* inst)
{
enum mon_resource_state prev_state = fsm->curr_state;
const char *state_str;
char key_name[ICMAP_KEYNAME_MAXLEN];
ENTER();
cs_fsm_state_set(fsm, next_state, inst, mon_fsm_cb);
if (prev_state == fsm->curr_state) {
return;
}
state_str = mon_res_state_to_str(fsm, fsm->curr_state);
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "state");
icmap_set_string(key_name, state_str);
}
static void mon_config_changed (struct cs_fsm* fsm, int32_t event, void * data)
{
struct resource_instance * inst = (struct resource_instance *)data;
char *tmp_str;
uint64_t tmp_value;
char key_name[ICMAP_KEYNAME_MAXLEN];
int run_updater;
int scanf_res = 0;
int32_t i32;
double dbl;
ENTER();
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "poll_period");
if (icmap_get_string(key_name, &tmp_str) == CS_OK) {
scanf_res = sscanf(tmp_str, "%"PRIu64, &tmp_value);
if (scanf_res != 1) {
log_printf (LOGSYS_LEVEL_WARNING,
"Could NOT use poll_period: %s (not uint64 type) for resource %s",
tmp_str, inst->name);
}
free(tmp_str);
if (tmp_value >= MON_MIN_PERIOD && tmp_value <= MON_MAX_PERIOD) {
log_printf (LOGSYS_LEVEL_DEBUG,
"poll_period changing from:%"PRIu64" to %"PRIu64".",
inst->period, tmp_value);
inst->period = tmp_value;
} else {
log_printf (LOGSYS_LEVEL_WARNING,
"Could NOT use poll_period:%"PRIu64" ms for resource %s",
tmp_value, inst->name);
}
}
if (inst->timer_handle) {
api->timer_delete(inst->timer_handle);
inst->timer_handle = 0;
}
run_updater = 0;
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "max");
if (icmap_get_string(key_name, &tmp_str) == CS_OK) {
if (inst->max_type == ICMAP_VALUETYPE_INT32) {
if (sscanf(tmp_str, "%"PRId32, &i32) != 1) {
inst->max.int32 = INT32_MAX;
mon_fsm_state_set (fsm, MON_S_STOPPED, inst);
} else {
inst->max.int32 = i32;
run_updater = 1;
}
}
if (inst->max_type == ICMAP_VALUETYPE_DOUBLE) {
if (sscanf(tmp_str, "%lf", &dbl) != 1) {
inst->max.dbl = INT32_MAX;
mon_fsm_state_set (fsm, MON_S_STOPPED, inst);
} else {
inst->max.dbl = dbl;
run_updater = 1;
}
}
free(tmp_str);
}
if (run_updater) {
mon_fsm_state_set (fsm, MON_S_RUNNING, inst);
/*
* run the updater, incase the period has shortened
* and to start the timer.
*/
inst->update_stats_fn (inst);
}
}
void mon_resource_failed (struct cs_fsm* fsm, int32_t event, void * data)
{
struct resource_instance * inst = (struct resource_instance *)data;
ENTER();
mon_fsm_state_set (fsm, MON_S_FAILED, inst);
}
static int32_t percent_mem_used_get(void)
{
sg_mem_stats *mem_stats;
sg_swap_stats *swap_stats;
long long total, freemem;
#ifdef HAVE_LIBSTATGRAB_GE_090
mem_stats = sg_get_mem_stats(NULL);
swap_stats = sg_get_swap_stats(NULL);
#else
mem_stats = sg_get_mem_stats();
swap_stats = sg_get_swap_stats();
#endif
if (mem_stats == NULL || swap_stats == NULL) {
log_printf (LOGSYS_LEVEL_ERROR, "Unable to get memory stats: %s",
sg_str_error(sg_get_error()));
return -1;
}
total = mem_stats->total + swap_stats->total;
freemem = mem_stats->free + swap_stats->free;
return ((total - freemem) * 100) / total;
}
static void mem_update_stats_fn (void *data)
{
struct resource_instance * inst = (struct resource_instance *)data;
int32_t new_value;
uint64_t timestamp;
char key_name[ICMAP_KEYNAME_MAXLEN];
new_value = percent_mem_used_get();
if (new_value > 0) {
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "current");
icmap_set_uint32(key_name, new_value);
timestamp = cs_timestamp_get();
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "last_updated");
icmap_set_uint64(key_name, timestamp);
if (new_value > inst->max.int32 && inst->fsm.curr_state != MON_S_FAILED) {
cs_fsm_process (&inst->fsm, MON_E_FAILURE, inst, mon_fsm_cb);
}
}
api->timer_add_duration(inst->period * MILLI_2_NANO_SECONDS,
inst, inst->update_stats_fn, &inst->timer_handle);
}
static double min15_loadavg_get(void)
{
sg_load_stats *load_stats;
#ifdef HAVE_LIBSTATGRAB_GE_090
load_stats = sg_get_load_stats (NULL);
#else
load_stats = sg_get_load_stats ();
#endif
if (load_stats == NULL) {
log_printf (LOGSYS_LEVEL_ERROR, "Unable to get load stats: %s",
sg_str_error (sg_get_error()));
return -1;
}
return load_stats->min15;
}
static void load_update_stats_fn (void *data)
{
struct resource_instance * inst = (struct resource_instance *)data;
uint64_t timestamp;
char key_name[ICMAP_KEYNAME_MAXLEN];
double min15 = min15_loadavg_get();
if (min15 > 0) {
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "current");
icmap_set_double(key_name, min15);
timestamp = cs_timestamp_get();
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "last_updated");
icmap_set_uint64(key_name, timestamp);
if (min15 > inst->max.dbl && inst->fsm.curr_state != MON_S_FAILED) {
cs_fsm_process (&inst->fsm, MON_E_FAILURE, inst, mon_fsm_cb);
}
}
api->timer_add_duration(inst->period * MILLI_2_NANO_SECONDS,
inst, inst->update_stats_fn, &inst->timer_handle);
}
static void mon_key_changed_cb (
int32_t event,
const char *key_name,
struct icmap_notify_value new_value,
struct icmap_notify_value old_value,
void *user_data)
{
struct resource_instance* inst = (struct resource_instance*)user_data;
char *last_key_part;
if (event == ICMAP_TRACK_DELETE && inst) {
log_printf (LOGSYS_LEVEL_WARNING,
"resource \"%s\" deleted from cmap!",
inst->name);
cs_fsm_process (&inst->fsm, MON_E_CONFIG_CHANGED, inst, mon_fsm_cb);
}
if (event == ICMAP_TRACK_MODIFY) {
last_key_part = strrchr(key_name, '.');
if (last_key_part == NULL)
return ;
last_key_part++;
if (strcmp(last_key_part, "max") == 0 ||
strcmp(last_key_part, "poll_period") == 0) {
ENTER();
cs_fsm_process (&inst->fsm, MON_E_CONFIG_CHANGED, inst, mon_fsm_cb);
}
}
}
static void mon_instance_init (struct resource_instance* inst)
{
uint64_t tmp_value;
char key_name[ICMAP_KEYNAME_MAXLEN];
icmap_track_t icmap_track = NULL;
char *tmp_str;
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "current");
if (inst->max_type == ICMAP_VALUETYPE_INT32) {
icmap_set_int32(key_name, 0);
} else {
icmap_set_double(key_name, 0);
}
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "last_updated");
icmap_set_uint64(key_name, 0);
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "state");
icmap_set_string(key_name, mon_stopped_str);
inst->fsm.name = inst->name;
inst->fsm.curr_entry = 0;
inst->fsm.curr_state = MON_S_STOPPED;
inst->fsm.table = mon_fsm_table;
inst->fsm.entries = sizeof(mon_fsm_table) / sizeof(struct cs_fsm_entry);
inst->fsm.state_to_str = mon_res_state_to_str;
inst->fsm.event_to_str = mon_res_event_to_str;
snprintf(key_name, ICMAP_KEYNAME_MAXLEN, "%s%s", inst->icmap_path, "poll_period");
if (icmap_get_string(key_name, &tmp_str) != CS_OK ||
sscanf(tmp_str, "%"PRIu64, &tmp_value) != 1) {
icmap_set_uint64(key_name, inst->period);
}
else {
if (tmp_value >= MON_MIN_PERIOD && tmp_value <= MON_MAX_PERIOD) {
inst->period = tmp_value;
} else {
log_printf (LOGSYS_LEVEL_WARNING,
"Could NOT use poll_period:%"PRIu64" ms for resource %s",
tmp_value, inst->name);
}
free(tmp_str);
}
cs_fsm_process (&inst->fsm, MON_E_CONFIG_CHANGED, inst, mon_fsm_cb);
icmap_track_add(inst->icmap_path,
ICMAP_TRACK_ADD | ICMAP_TRACK_MODIFY | ICMAP_TRACK_DELETE | ICMAP_TRACK_PREFIX,
mon_key_changed_cb, inst, &icmap_track);
}
static char *mon_exec_init_fn (struct corosync_api_v1 *corosync_api)
{
#ifdef HAVE_LIBSTATGRAB_GE_090
sg_init(1);
#else
sg_init();
#endif
api = corosync_api;
mon_instance_init (&memory_used_inst);
mon_instance_init (&load_15min_inst);
return NULL;
}

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