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spine.c
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/*
ex: set tabstop=4 shiftwidth=4 autoindent:
+-------------------------------------------------------------------------+
| Copyright (C) 2004-2021 The Cacti Group |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA |
| |
+-------------------------------------------------------------------------+
| spine: a backend data gatherer for cacti |
+-------------------------------------------------------------------------+
| This poller would not have been possible without: |
| - Larry Adams (current development and enhancements) |
| - Rivo Nurges (rrd support, mysql poller cache, misc functions) |
| - RTG (core poller code, pthreads, snmp, autoconf examples) |
| - Brady Alleman/Doug Warner (threading ideas, implimentation details) |
+-------------------------------------------------------------------------+
| - Cacti - http://www.cacti.net/ |
+-------------------------------------------------------------------------+
*
* COMMAND-LINE PARAMETERS
*
* -h | --help
* -v | --version
*
* Show a brief help listing, then exit.
*
* -C | --conf=F
*
* Provide the name of the Spine configuration file, which contains
* the parameters for connecting to the database. In the absence of
* this, it looks [WHERE?]
*
* -f | --first=ID
*
* Start polling with device <ID> (else starts at the beginning)
*
* -l | --last=ID
*
* Stop polling after device <ID> (else ends with the last one)
*
* -m | --mibs
*
* Collect all system mibs this pass
*
* -N | --mode=online|offline|recovery
*
* For remote pollers, the polling mode. The default is 'online'
*
* -H | --hostlist="hostid1,hostid2,hostid3,...,hostidn"
*
* Override the expected first host, last host behavior with a list of hostids.
*
* -O | --option=setting:value
*
* Override a DB-provided value from the settings table in the DB.
*
* -C | -conf=FILE
*
* Specify the location of the Spine configuration file.
*
* -R | --readonly
*
* This processing is readonly with respect to the database: it's
* meant only for developer testing.
*
* -S | --stdout
*
* All logging goes to the standard output
*
* -V | --verbosity=V
*
* Set the debug logging verbosity to <V>. Can be 1..5 or
* NONE/LOW/MEDIUM/HIGH/DEBUG (case insensitive).
*
* The First/Last device IDs are all relative to the "hosts" table in the
* Cacti database, and this mechanism allows us to split up the polling
* duties across multiple "spine" instances: each one gets a subset of
* the polling range.
*
* For compatibility with poller.php, we also accept the first and last
* device IDs as standalone parameters on the command line.
*/
#include "common.h"
#include "spine.h"
/* Global Variables */
int entries = 0;
int num_hosts = 0;
sem_t available_threads;
sem_t available_scripts;
double start_time;
config_t set;
php_t *php_processes = 0;
char config_paths[CONFIG_PATHS][BUFSIZE];
int *debug_devices;
pool_t *db_pool_local;
pool_t *db_pool_remote;
static char *getarg(char *opt, char ***pargv);
static void display_help(int only_version);
void poller_push_data_to_main();
#ifdef HAVE_LCAP
/* This patch is adapted (copied) patch for ntpd from Jarno Huuskonen and
* Pekka Savola that was adapted (copied) from a patch by Chris Wings to drop
* root for xntpd.
*/
void drop_root(uid_t server_uid, gid_t server_gid) {
cap_t caps;
if (prctl(PR_SET_KEEPCAPS, 1)) {
SPINE_LOG_HIGH(("prctl(PR_SET_KEEPCAPS, 1) failed"));
exit(1);
}
if (setgroups(0, NULL) == -1) {
SPINE_LOG_HIGH(("setgroups failed."));
exit(1);
}
if (setegid(server_gid) == -1 || seteuid(server_uid) == -1) {
SPINE_LOG_HIGH(("setegid/seteuid to uid=%d/gid=%d failed.", server_uid, server_gid));
exit(1);
}
caps = cap_from_text("cap_net_raw=eip");
if (caps == NULL) {
SPINE_LOG_HIGH(("cap_from_text failed."));
exit(1);
}
if (cap_set_proc(caps) == -1) {
SPINE_LOG_HIGH(("cap_set_proc failed."));
exit(1);
}
/* Try to free the memory from cap_from_text */
cap_free( caps );
if ( setregid(server_gid, server_gid) == -1 ||
setreuid(server_uid, server_uid) == -1 ) {
SPINE_LOG_HIGH(("setregid/setreuid to uid=%d/gid=%d failed.",
server_uid, server_gid));
exit(1);
}
SPINE_LOG_LOW(("running as uid(%d)/gid(%d) euid(%d)/egid(%d) with cap_net_raw=eip.",
getuid(), getgid(), geteuid(), getegid()));
}
#endif /* HAVE_LCAP */
/*! \fn main(int argc, char *argv[])
* \brief The Spine program entry point
* \param argc The number of arguments passed to the function plus one (+1)
* \param argv An array of the command line arguments
*
* The Spine entry point. This function performs the following tasks.
* 1) Processes command line input parameters
* 2) Processes the Spine configuration file to obtain database access information
* 3) Process runtime parameters from the settings table
* 4) Initialize the runtime threads and mutexes for the threaded environment
* 5) Initialize Net-SNMP, MySQL, and the PHP Script Server (if required)
* 6) Spawns X threads in order to process hosts
* 7) Loop until either all hosts have been processed or until the poller runtime
* has been exceeded
* 8) Close database and free variables
* 9) Log poller process statistics if required
* 10) Exit
*
* Note: Command line runtime parameters override any database settings.
*
* \return 0 if SUCCESS, or -1 if FAILED
*
*/
int main(int argc, char *argv[]) {
struct timeval now;
char *conf_file = NULL;
double begin_time, end_time, cur_time;
int num_rows = 0;
int device_counter = 0;
int valid_conf_file = FALSE;
char querybuf[MEGA_BUFSIZE], *qp = querybuf;
char *host_time = NULL;
double host_time_double = 0;
int itemsPT = 0;
int device_threads;
sem_t thread_init_sem;
int a_threads_value;
struct timespec until_spec;
gettimeofday(&now, NULL);
start_time = TIMEVAL_TO_DOUBLE(now);
#ifdef HAVE_LCAP
if (geteuid() == 0) {
drop_root(getuid(), getgid());
}
#endif /* HAVE_LCAP */
pthread_t* threads = NULL;
poller_thread_t** details = NULL;
poller_thread_t* poller_details = NULL;
pthread_attr_t attr;
int* ids = NULL;
int mode = REMOTE;
MYSQL mysql;
MYSQL mysqlr;
MYSQL_RES *result = NULL;
MYSQL_RES *tresult = NULL;
MYSQL_ROW mysql_row;
int canexit = FALSE;
int host_id = 0;
int i;
int thread_status = 0;
int total_items = 0;
int change_host = TRUE;
int current_thread;
int threads_final = 0;
int threads_missing = -1;
int threads_count;
UNUSED_PARAMETER(argc); /* we operate strictly with argv */
/* install the spine signal handler */
install_spine_signal_handler();
/* establish php processes and initialize space */
php_processes = (php_t*) calloc(MAX_PHP_SERVERS, sizeof(php_t));
for (i = 0; i < MAX_PHP_SERVERS; i++) {
php_processes[i].php_state = PHP_BUSY;
}
/* create the array of debug devices */
debug_devices = calloc(100, sizeof(int));
/* initialize icmp_avail */
set.icmp_avail = TRUE;
/* detect and compensate for stdin/stderr ttys */
if (!isatty(fileno(stdout))) {
set.stdout_notty = TRUE;
} else {
set.stdout_notty = FALSE;
}
if (!isatty(fileno(stderr))) {
set.stderr_notty = TRUE;
} else {
set.stderr_notty = FALSE;
}
/* set start time for cacti */
begin_time = get_time_as_double();
/* set default verbosity */
set.log_level = POLLER_VERBOSITY_LOW;
/* set default log separator */
set.log_datetime_separator = GDC_DEFAULT;
/* set default log format */
set.log_datetime_format = GD_DEFAULT;
/* set the default exit code */
set.exit_code = 0;
set.exit_size = 0;
/* get static defaults for system */
config_defaults();
/*! ----------------------------------------------------------------
* PROCESS COMMAND LINE
*
* Run through the list of ARGV words looking for parameters we
* know about. Most have two flavors (-C + --conf), and many
* themselves take a parameter.
*
* These parameters can be structured in two ways:
*
* --conf=FILE both parts in one argv[] string
* --conf FILE two separate argv[] strings
*
* We set "arg" to point to "--conf", and "opt" to point to FILE.
* The helper routine
*
* In each loop we set "arg" to next argv[] string, then look
* to see if it has an equal sign. If so, we split it in half
* and point to the option separately.
*
* NOTE: most direction to the program is given with dash-type
* parameters, but we also allow standalone numeric device IDs
* in "first last" format: this is how poller.php calls this
* program.
*/
/* initialize some global variables */
set.poller_id = 1;
set.start_host_id = -1;
set.end_host_id = -1;
set.host_id_list[0] = '\0';
set.php_initialized = FALSE;
set.logfile_processed = FALSE;
set.parent_fork = SPINE_PARENT;
set.mode = REMOTE_ONLINE;
for (argv++; *argv; argv++) {
char *arg = *argv;
char *opt = strchr(arg, '='); /* pick off the =VALUE part */
if (opt) *opt++ = '\0';
if (STRMATCH(arg, "-f") || STRMATCH(arg, "--first")) {
if (HOSTID_DEFINED(set.start_host_id)) {
die("ERROR: %s can only be used once", arg);
}
set.start_host_id = atoi(opt = getarg(opt, &argv));
if (!HOSTID_DEFINED(set.start_host_id)) {
die("ERROR: '%s=%s' is invalid first-host ID", arg, opt);
}
}
else if (STRMATCH(arg, "-l") || STRIMATCH(arg, "--last")) {
if (HOSTID_DEFINED(set.end_host_id)) {
die("ERROR: %s can only be used once", arg);
}
set.end_host_id = atoi(opt = getarg(opt, &argv));
if (!HOSTID_DEFINED(set.end_host_id)) {
die("ERROR: '%s=%s' is invalid last-host ID", arg, opt);
}
}
else if (STRMATCH(arg, "-p") || STRIMATCH(arg, "--poller")) {
set.poller_id = atoi(getarg(opt, &argv));
}
else if (STRMATCH(arg, "-N") || STRIMATCH(arg, "--mode")) {
if (STRIMATCH(getarg(opt, &argv), "online")) {
set.mode = REMOTE_ONLINE;
} else if (STRIMATCH(getarg(opt, &argv), "offline")) {
set.mode = REMOTE_OFFLINE;
} else if (STRIMATCH(getarg(opt, &argv), "recovery")) {
set.mode = REMOTE_RECOVERY;
} else {
die("ERROR: invalid polling mode '%s' specified", opt);
}
}
else if (STRMATCH(arg, "-H") || STRIMATCH(arg, "--hostlist")) {
snprintf(set.host_id_list, BIG_BUFSIZE, "%s", getarg(opt, &argv));
}
else if (STRMATCH(arg, "-M") || STRMATCH(arg, "--mibs")) {
set.mibs = 1;
}
else if (STRMATCH(arg, "-h") || STRMATCH(arg, "--help")) {
display_help(FALSE);
exit(EXIT_SUCCESS);
}
else if (STRMATCH(arg, "-v") || STRMATCH(arg, "--version")) {
display_help(TRUE);
exit(EXIT_SUCCESS);
}
else if (STRMATCH(arg, "-O") || STRIMATCH(arg, "--option")) {
char *setting = getarg(opt, &argv);
char *value = strchr(setting, ':');
if (*value) {
*value++ = '\0';
} else {
die("ERROR: -O requires setting:value");
}
set_option(setting, value);
}
else if (STRMATCH(arg, "-R") || STRMATCH(arg, "--readonly") || STRMATCH(arg, "--read-only")) {
set.SQL_readonly = TRUE;
}
else if (STRMATCH(arg, "-C") || STRMATCH(arg, "--conf")) {
conf_file = strdup(getarg(opt, &argv));
}
else if (STRMATCH(arg, "-S") || STRMATCH(arg, "--stdout")) {
set_option("log_destination", "STDOUT");
}
else if (STRMATCH(arg, "-L") || STRMATCH(arg, "--log")) {
set_option("log_destination", getarg(opt, &argv));
}
else if (STRMATCH(arg, "-V") || STRMATCH(arg, "--verbosity")) {
set_option("log_verbosity", getarg(opt, &argv));
}
else if (!HOSTID_DEFINED(set.start_host_id) && all_digits(arg)) {
set.start_host_id = atoi(arg);
}
else if (!HOSTID_DEFINED(set.end_host_id) && all_digits(arg)) {
set.end_host_id = atoi(arg);
}
else {
die("ERROR: %s is an unknown command-line parameter", arg);
}
}
/* we attempt to support scripts better in cygwin */
#if defined(__CYGWIN__)
setenv("CYGWIN", "nodosfilewarning", 1);
if (file_exists("./sh.exe")) {
set.cygwinshloc = 0;
if (set.log_level == POLLER_VERBOSITY_DEBUG) {
printf("The Shell Command Exists in the current directory\n");
}
} else {
set.cygwinshloc = 1;
if (set.log_level == POLLER_VERBOSITY_DEBUG) {
printf("The Shell Command Exists in the /bin directory\n");
}
}
#endif
/* we require either both the first and last hosts, or niether host */
if ((HOSTID_DEFINED(set.start_host_id) != HOSTID_DEFINED(set.end_host_id)) &&
(!strlen(set.host_id_list))) {
die("ERROR: must provide both -f/-l, a hostlist (-H/--hostlist), or neither");
}
if (set.start_host_id > set.end_host_id) {
die("ERROR: Invalid row spec; first host_id must be less than the second");
}
/* read configuration file to establish local environment */
if (conf_file) {
if ((read_spine_config(conf_file)) < 0) {
die("ERROR: Could not read config file: %s", conf_file);
} else {
valid_conf_file = TRUE;
}
} else {
if (!(conf_file = calloc(CONFIG_PATHS, DBL_BUFSIZE))) {
die("ERROR: Fatal malloc error: spine.c conf_file!");
}
for (i=0; i<CONFIG_PATHS; i++) {
snprintf(conf_file, DBL_BUFSIZE, "%s%s", config_paths[i], DEFAULT_CONF_FILE);
if (read_spine_config(conf_file) >= 0) {
valid_conf_file = TRUE;
break;
}
if (i == CONFIG_PATHS-1) {
snprintf(conf_file, DBL_BUFSIZE, "%s%s", config_paths[0], DEFAULT_CONF_FILE);
}
}
}
if (valid_conf_file) {
/* read settings table from the database to further establish environment */
read_config_options();
} else {
die("FATAL: Unable to read configuration file!");
}
/* set the poller interval for those who use less than 5 minute intervals */
if (set.poller_interval == 0) {
set.poller_interval = 300;
}
/* tokenize the debug devices */
if (strlen(set.selective_device_debug)) {
SPINE_LOG_DEBUG(("DEBUG: Selective Debug Devices %s", set.selective_device_debug));
int i = 0;
char *token = strtok(set.selective_device_debug, ",");
while(token) {
debug_devices[i] = atoi(token);
debug_devices[i+1] = '\0';
token = strtok(NULL, ",");
i++;
}
} else {
debug_devices[0] = '\0';
}
/* connect for main loop */
db_connect(LOCAL, &mysql);
/* setup local connection pool for hosts */
db_pool_local = (pool_t *) calloc(set.threads, sizeof(pool_t));
db_create_connection_pool(LOCAL);
if (set.poller_id > 1 && set.mode == REMOTE_ONLINE) {
db_connect(REMOTE, &mysqlr);
mode = REMOTE;
/* setup remote connection pool for hosts */
db_pool_remote = (pool_t *) calloc(set.threads, sizeof(pool_t));
db_create_connection_pool(REMOTE);
} else {
mode = LOCAL;
}
/* Since MySQL 5.7 the sql_mode defaults are too strict for cacti */
db_insert(&mysql, LOCAL, "SET SESSION sql_mode = (SELECT REPLACE(@@sql_mode,'NO_ZERO_DATE', ''))");
db_insert(&mysql, LOCAL, "SET SESSION sql_mode = (SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY', ''))");
if (set.log_level == POLLER_VERBOSITY_DEBUG) {
SPINE_LOG_DEBUG(("DEBUG: Version %s starting", VERSION));
if (set.poller_id > 1) {
if (mode == REMOTE) {
SPINE_LOG_DEBUG(("DEBUG: Sending entries to remote database in 'online' mode"));
} else {
SPINE_LOG_DEBUG(("DEBUG: Sending entries to local database in 'offline', or 'recovery' mode"));
}
}
} else {
if (!set.stdout_notty) {
printf("Version %s starting\n", VERSION);
if (set.poller_id > 1) {
if (mode == REMOTE) {
printf("Sending entries to remote database in 'online' mode\n");
} else {
printf("Sending entries to local database in 'offline', or 'recovery' mode\n");
}
}
}
}
/* see if mysql is thread safe */
if (mysql_thread_safe()) {
if (set.log_level == POLLER_VERBOSITY_DEBUG) {
SPINE_LOG(("DEBUG: MySQL is Thread Safe!"));
}
} else {
SPINE_LOG(("WARNING: MySQL is NOT Thread Safe!"));
}
/* test for asroot permissions for ICMP */
checkAsRoot();
/* initialize SNMP */
SPINE_LOG_DEBUG(("DEBUG: Initializing Net-SNMP API"));
snmp_spine_init();
/* initialize PHP if required */
SPINE_LOG_DEBUG(("DEBUG: Initializing PHP Script Server(s)"));
/* tell spine that it is parent, and set the poller id */
set.parent_fork = SPINE_PARENT;
/* initialize the script server */
if (set.php_required) {
php_init(PHP_INIT);
set.php_initialized = TRUE;
set.php_current_server = 0;
}
/* determine if the poller_id field exists in the host table */
result = db_query(&mysql, LOCAL, "SHOW COLUMNS FROM host LIKE 'poller_id'");
if (mysql_num_rows(result)) {
set.poller_id_exists = TRUE;
} else {
set.poller_id_exists = FALSE;
if (set.poller_id > 0) {
SPINE_LOG(("WARNING: PollerID > 0, but 'host' table does NOT contain the poller_id column!!"));
}
}
db_free_result(result);
/* determine if the device_threads field exists in the host table */
result = db_query(&mysql, LOCAL, "SHOW COLUMNS FROM host LIKE 'device_threads'");
if (mysql_num_rows(result)) {
set.device_threads_exists = TRUE;
} else {
set.device_threads_exists = FALSE;
}
db_free_result(result);
if (set.device_threads_exists) {
SPINE_LOG_MEDIUM(("Spine will support multithread device polling."));
} else {
SPINE_LOG_MEDIUM(("Spine did not detect multithreaded device polling."));
}
/* obtain the list of hosts to poll */
if (set.device_threads_exists) {
qp += sprintf(qp, "SELECT id, device_threads FROM host");
} else {
qp += sprintf(qp, "SELECT id, '1' as device_threads FROM host");
}
qp += sprintf(qp, " WHERE disabled=''");
if (!strlen(set.host_id_list)) {
qp += append_hostrange(qp, "id"); /* AND id BETWEEN a AND b */
} else {
qp += sprintf(qp, " AND id IN(%s)", set.host_id_list);
}
if (set.poller_id_exists) {
qp += sprintf(qp, " AND host.poller_id=%i", set.poller_id);
}
qp += sprintf(qp, " ORDER BY polling_time DESC");
result = db_query(&mysql, LOCAL, querybuf);
if (set.poller_id == 1) {
num_rows = mysql_num_rows(result) + 1; /* pollerid 1 takes care of not host based data sources */
} else {
num_rows = mysql_num_rows(result);
}
if (!(threads = (pthread_t *)malloc(num_rows * sizeof(pthread_t)))) {
die("ERROR: Fatal malloc error: spine.c threads!");
}
if (!(details = (poller_thread_t **)malloc(num_rows * sizeof(poller_thread_t*)))) {
die("ERROR: Fatal malloc error: spine.c details!");
}
if (!(ids = (int *)malloc(num_rows * sizeof(int)))) {
die("ERROR: Fatal malloc error: spine.c host id's!");
}
/* initialize winsock library on Windows */
SOCK_STARTUP;
/* mark the spine process as started */
snprintf(querybuf, BIG_BUFSIZE, "INSERT INTO poller_time (poller_id, pid, start_time, end_time) VALUES (%i, %i, NOW(), '0000-00-00 00:00:00')", set.poller_id, getpid());
if (mode == REMOTE) {
db_insert(&mysqlr, REMOTE, querybuf);
} else {
db_insert(&mysql, LOCAL, querybuf);
}
/* initialize threads and mutexes */
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
init_mutexes();
/* initialize available_threads semaphore */
sem_init(&available_threads, 0, set.threads);
/* initialize available_scripts semaphore */
sem_init(&available_scripts, 0, MAX_SIMULTANEOUS_SCRIPTS);
/* initialize thread initialization semaphore */
sem_init(&thread_init_sem, 0, 1);
/* specify the point of timeout for timedwait semaphores */
until_spec.tv_sec = (time_t)(set.poller_interval + begin_time - 0.2);
until_spec.tv_nsec = 0;
sem_getvalue(&available_threads, &a_threads_value);
SPINE_LOG_MEDIUM(("DEBUG: Initial Value of Available Threads is %i (%i outstanding)", a_threads_value, set.threads - a_threads_value));
/* tell fork processes that they are now active */
set.parent_fork = SPINE_FORK;
/* initialize the threading code */
device_threads = 1;
current_thread = 0;
/* poller 0 always polls host 0 */
if (set.poller_id == 1) {
host_id = 0;
change_host = FALSE;
} else {
change_host = TRUE;
}
/* loop through devices until done */
while (canexit == FALSE && device_counter < num_rows) {
if (change_host) {
mysql_row = mysql_fetch_row(result);
host_id = atoi(mysql_row[0]);
device_threads = atoi(mysql_row[1]);
current_thread = 1;
if (device_threads < 1) {
device_threads = 1;
}
} else {
current_thread++;
}
/* adjust device threads in cases where the host does not have sufficient data sources */
snprintf(querybuf, BIG_BUFSIZE, "SELECT COUNT(local_data_id) FROM poller_item WHERE host_id=%i AND rrd_next_step <=0", host_id);
tresult = db_query(&mysql, LOCAL, querybuf);
mysql_row = mysql_fetch_row(tresult);
total_items = atoi(mysql_row[0]);
db_free_result(tresult);
if (total_items && total_items < device_threads) {
device_threads = total_items;
}
change_host = (current_thread >= device_threads) ? TRUE : FALSE;
/* determine how many items will be polled per thread */
if (device_threads > 1) {
if (current_thread == 1) {
snprintf(querybuf, BIG_BUFSIZE, "SELECT CEIL(COUNT(local_data_id)/%i) FROM poller_item WHERE host_id=%i AND rrd_next_step <=0", device_threads, host_id);
tresult = db_query(&mysql, LOCAL, querybuf);
mysql_row = mysql_fetch_row(tresult);
itemsPT = atoi(mysql_row[0]);
db_free_result(tresult);
if (host_time) free(host_time);
host_time = get_host_poll_time();
host_time_double = get_time_as_double();
}
} else {
itemsPT = 0;
if (host_time) free(host_time);
host_time = get_host_poll_time();
host_time_double = get_time_as_double();
}
/* populate the thread structure */
if (!(poller_details = (poller_thread_t *)malloc(sizeof(poller_thread_t)))) {
die("ERROR: Fatal malloc error: spine.c poller_details!");
}
poller_details->host_id = host_id;
poller_details->host_thread = current_thread;
poller_details->last_host_thread = device_threads;
poller_details->host_data_ids = itemsPT;
poller_details->host_time = host_time;
poller_details->host_time_double = host_time_double;
poller_details->thread_init_sem = &thread_init_sem;
poller_details->complete = FALSE;
details[device_counter] = poller_details;
/* dev note - errno was never primed at this point in previous version of code */
int wait_retries = 0;
int sem_err = 0;
while (++wait_retries < 100) {
sem_err = sem_trywait(&available_threads);
if (sem_err == 0) {
break;
} else if (sem_err == EAGAIN || sem_err == EWOULDBLOCK) {
SPINE_LOG_DEVDBG(("WARNING: Spine Timed Out While Processing Available Thread Lock Internal"));
} else {
SPINE_LOG_DEVDBG(("WARNING: Spine Error %ld While Processing Available Thread Lock Internal", sem_err));
}
usleep(10000);
}
if (sem_err == EDEADLK) {
SPINE_LOG(("ERROR: Spine would have deadlocked Available Thread Lock"));
break;
} else if (sem_err == ETIMEDOUT || sem_err == EWOULDBLOCK || wait_retries >= 100) {
SPINE_LOG(("ERROR: Spine Timed Out While Processing Available Thread Lock"));
break;
} else if (sem_err != 0) {
SPINE_LOG(("ERROR: Spine Encounter Unexpected Error %d For Available Thread Lock", sem_err));
break;
}
wait_retries = 0;
while (++wait_retries < 100) {
sem_err = sem_trywait(&thread_init_sem);
if (sem_err == 0) {
break;
} else if (sem_err == EAGAIN || sem_err == EWOULDBLOCK) {
SPINE_LOG_DEVDBG(("WARNING: Spine Timed Out While Processing Thread Initialization Lock"));
} else {
SPINE_LOG_DEVDBG(("WARNING: Spine Error %ld While Processing Thread Initialization Lock", sem_err));
}
usleep(10000);
}
if (sem_err == EDEADLK) {
SPINE_LOG(("ERROR: Spine would have deadlocked Thread Initialization Lock"));
break;
} else if (sem_err == ETIMEDOUT || sem_err == EWOULDBLOCK || wait_retries >= 100) {
SPINE_LOG(("ERROR: Spine Timed Out While Processing Thread Initialization Lock"));
break;
} else if (sem_err != 0) {
SPINE_LOG(("ERROR: Spine Encountered Unexpected Error %d For Thread Initialization Lock", sem_err));
break;
}
/* create child process */
thread_status = pthread_create(&threads[device_counter], &attr, child, poller_details);
switch (thread_status) {
case 0:
SPINE_LOG_DEBUG(("DEBUG: Valid Thread to be Created"));
if (change_host) {
device_counter++;
}
sem_getvalue(&available_threads, &a_threads_value);
SPINE_LOG_MEDIUM(("DEBUG: Available Threads is %i (%i outstanding)", a_threads_value, set.threads - a_threads_value));
sem_post(&thread_init_sem);
SPINE_LOG_DEVDBG(("DEBUG: DTS: device = %d, host_id = %d, host_thread = %d,"
" last_host_thread = %d, host_data_ids = %d, complete = %d",
device_counter-1,
poller_details->host_id,
poller_details->host_thread,
poller_details->last_host_thread,
poller_details->host_data_ids,
poller_details->complete));
break;
case EAGAIN:
SPINE_LOG(("ERROR: The System Lacked the Resources to Create a Thread"));
break;
case EFAULT:
SPINE_LOG(("ERROR: The Thread or Attribute were Invalid"));
break;
case EINVAL: SPINE_LOG(("ERROR: The Thread Attribute is Not Initialized"));
break;
default:
SPINE_LOG(("ERROR: Unknown Thread Creation Error - %d", thread_status));
break;
}
/* Restore thread initialization semaphore if thread creation failed */
if (thread_status) {
sem_post(&thread_init_sem);
}
}
sem_getvalue(&available_threads, &a_threads_value);
/* wait for all threads to 'complete'
* using the mutex here as the semaphore will
* show zero before the children are done */
while (a_threads_value < set.threads) {
cur_time = get_time_as_double();
if (cur_time - begin_time > set.poller_interval) {
SPINE_LOG(("ERROR: Spine Timed Out While Waiting for %d Threads to End", set.threads - a_threads_value));
break;
}
SPINE_LOG_HIGH(("WARNING: Spine Sleeping While Waiting for %d Threads to End", set.threads - a_threads_value));
usleep(500000);
sem_getvalue(&available_threads, &a_threads_value);
}
threads_final = set.threads - a_threads_value;
if (threads_final) {
SPINE_LOG_HIGH(("The final count of Threads is %i", threads_final));
for (threads_count = 0; threads_count < num_rows; threads_count++) {
poller_thread_t* det = details[threads_count];
if (threads_missing == -1 && det == NULL) {
threads_missing = threads_count;
}
if (det != NULL) { // && !det->complete) {
SPINE_LOG_HIGH(("INFO: Thread %scomplete for Device[%d] and %d to %d sources",
det->complete?"":"in",
det->host_id,
det->host_data_ids * (det->host_thread - 1),
det->host_data_ids * (det->host_thread)));
SPINE_LOG_DEVDBG(("DEBUG: DTF: device = %d, host_id = %d, host_thread = %d,"
" last_host_thread = %d, host_data_ids = %d, complete = %d",
threads_count,
det->host_id,
det->host_thread,
det->last_host_thread,
det->host_data_ids,
det->complete));
}
}
if (threads_missing > -1) {
SPINE_LOG_HIGH(("ERROR: There were %d threads which did not run", num_rows - threads_missing));
}
} else {
SPINE_LOG_MEDIUM(("The Final Value of Threads is %i", threads_final));
}
/* tell Spine that it is now parent */
set.parent_fork = SPINE_PARENT;
/* push data back to the main server */
if (set.poller_id > 1 && set.mode == REMOTE_ONLINE && !set.SQL_readonly) {
poller_push_data_to_main();
}
/* print out stats */
gettimeofday(&now, NULL);
/* update the db for |data_time| on graphs */
if (set.poller_id == 1) {
db_insert(&mysql, LOCAL, "REPLACE INTO settings (name,value) VALUES ('date',NOW())");
}
snprintf(querybuf, BIG_BUFSIZE, "UPDATE poller_time SET end_time=NOW() WHERE poller_id=%i AND pid=%i", set.poller_id, getpid());
if (mode == REMOTE) {
db_insert(&mysqlr, REMOTE, querybuf);
} else {
db_insert(&mysql, LOCAL, querybuf);
}
if (db_pool_local) {
db_close_connection_pool(LOCAL);
}
if (db_pool_remote) {
db_close_connection_pool(REMOTE);
}
/* cleanup and exit program */
pthread_attr_destroy(&attr);
SPINE_LOG_DEBUG(("DEBUG: Thread Cleanup Complete"));
/* close the php script server */
if (set.php_required) {
php_close(PHP_INIT);
}
SPINE_LOG_DEBUG(("DEBUG: PHP Script Server Pipes Closed"));
/* free malloc'd variables */
for (i = 0; i < num_rows; i++) {
if (details[i] != NULL) {
free(details[i]);
}
}
free(details);
free(threads);
free(ids);
free(conf_file);
free(debug_devices);
SPINE_LOG_DEBUG(("DEBUG: Allocated Variable Memory Freed"));
/* close mysql */
db_free_result(result);
db_disconnect(&mysql);
if (set.poller_id > 1 && set.mode == REMOTE_ONLINE) {
db_disconnect(&mysqlr);
}
SPINE_LOG_DEBUG(("DEBUG: MYSQL Free & Close Completed"));
/* close snmp */
snmp_spine_close();
SPINE_LOG_DEBUG(("DEBUG: Net-SNMP Close Completed"));
/* finally add some statistics to the log and exit */
end_time = TIMEVAL_TO_DOUBLE(now);
if (set.log_level >= POLLER_VERBOSITY_MEDIUM) {
SPINE_LOG(("Time: %.4f s, Threads: %i, Devices: %i", (end_time - begin_time), set.threads, num_rows));
} else {
/* provide output if running from command line */
if (!set.stdout_notty) {