/*
* isns_update gets call on modify_admin, this is changes to
* isns access and/or isns server
*/
int
isns_update()
{
Boolean_t is_isns_enabled = isns_enabled();
/*
* If the isns thread was not started before and we are going
* enabled from disabled start the threads.
*/
if (isns_server_connection_thr_running == False) {
if (is_isns_enabled == True) {
if (isns_init(NULL) != 0) {
return (-1);
} else {
return (0);
}
} else {
syslog(LOG_INFO,
"isns_update: isns is disabled");
}
} else {
/*
* isns is disabled after enabled,
* log off all targets and fini isns service
*/
if (is_isns_enabled == False) {
isns_shutdown = True;
/* pthread_join for the isns thread */
(void) pthread_join(isns_tid, NULL);
(void) pthread_join(scn_tid, NULL);
isns_server_connection_thr_running = False;
} else {
/*
* Incase the original thread is still running
* we should reap it
*/
connection_thr_bail_out = True;
(void) pthread_join(isns_tid, NULL);
connection_thr_bail_out = False;
/*
* Read the configuration file incase the server
* has changed.
*/
if (isns_populate_and_update_server_info(True) == -1) {
return (-1);
}
}
}
return (0);
}
int main(int argc, char *argv[])
{
char optstring[] = "i:p:dfs:vh";
struct option longopts[] = {
{"isns-server", 1, NULL, 'i'},
{"isns-port", 1, NULL, 'p'},
{"debug", 0, NULL, 'd'},
{"foreground", 0, NULL, 'f'},
{"configfs-iscsi-path", 1, NULL, 's'},
{"version", 0, NULL, 'v'},
{"help", 0, NULL, 'h'},
{NULL, 0, NULL, 0}
};
int option;
int longindex = 0;
int ifd = -1, sfd = -1, tfd = -1;
struct epoll_event events[EPOLL_MAX_FD];
ssize_t nr_events;
bool daemon = true;
int ret = EXIT_FAILURE;
size_t configsz;
conffile_read();
while ((option = getopt_long(argc, argv, optstring, longopts,
&longindex)) != -1) {
switch (option) {
case 'i':
configsz = sizeof(config.isns_server);
strncpy(config.isns_server, optarg, configsz);
config.isns_server[configsz - 1] = '\0';
break;
case 'p':
sscanf(optarg, "%hu", &config.isns_port);
break;
case 'd':
config.log_level = LOG_DEBUG;
daemon = false;
break;
case 'f':
daemon = false;
break;
case 's':
configsz = sizeof(config.configfs_iscsi_path);
strncpy(config.configfs_iscsi_path, optarg, configsz);
config.configfs_iscsi_path[configsz - 1] = '\0';
break;
case 'v':
printf(PROGNAME " version " TARGET_ISNS_VERSION "\n");
exit(EXIT_SUCCESS);
break;
case 'h':
print_usage();
exit(EXIT_SUCCESS);
break;
case ':':
case '?':
exit(EXIT_FAILURE);
break;
}
}
if (!configfs_iscsi_path_exists()) {
fprintf(stderr,
"Error: configfs is not mounted or the "
"target and iSCSI modules are not loaded.\n");
fprintf(stderr,
"Error: %s missing.\n",
config.configfs_iscsi_path);
exit(EXIT_FAILURE);
}
if (daemon) {
daemonize();
pidfile_create();
}
log_init(PROGNAME, daemon, config.log_level);
log_print(LOG_INFO, PROGNAME " version " TARGET_ISNS_VERSION " started");
epoll_init_fds();
if (isns_init(config.isns_server, config.isns_port) == -1) {
log_print(LOG_ERR, "failed to initialize iSNS client");
goto err_init;
}
if ((epoll_fd = epoll_create1(0)) == -1) {
log_print(LOG_ERR, "failed to create epoll instance");
goto err_epoll_fd;
}
if ((tfd = isns_registration_timer_init()) == -1) {
log_print(LOG_ERR, "failed to create timerfd instance");
goto err_tfd;
}
epoll_set_fd(EPOLL_REGISTRATION_TIMER, tfd);
if ((ifd = configfs_inotify_init()) == -1) {
log_print(LOG_ERR, "failed to create inotify instance");
goto err_ifd;
}
epoll_set_fd(EPOLL_INOTIFY, ifd);
if ((sfd = signal_init()) == -1) {
log_print(LOG_ERR, "failed to create signalfd instance");
goto err_sfd;
}
epoll_set_fd(EPOLL_SIGNAL, sfd);
isns_start();
while (true) {
nr_events = epoll_wait(epoll_fd, events, ARRAY_SIZE(events), -1);
for (int i = 0; i < nr_events; i++) {
int fd = events[i].data.fd;
if (fd == epoll_set[EPOLL_SIGNAL]) {
if (signal_is_quit(fd))
goto quit;
} else if (fd == epoll_set[EPOLL_INOTIFY])
configfs_inotify_events_handle();
else if (fd == epoll_set[EPOLL_REGISTRATION_TIMER])
isns_registration_refresh();
else if (fd == epoll_set[EPOLL_ISNS])
isns_handle();
else if (fd == epoll_set[EPOLL_SCN_LISTEN])
isns_scn_handle(true);
else if (fd == epoll_set[EPOLL_SCN])
isns_scn_handle(false);
}
}
quit:
ret = EXIT_SUCCESS;
isns_stop();
sleep(1);
close(sfd);
err_sfd:
configfs_inotify_cleanup(); /* closes ifd */
err_ifd:
close(tfd);
err_tfd:
close(epoll_fd);
err_epoll_fd:
isns_exit();
err_init:
log_print(LOG_INFO, PROGNAME " stopped");
log_close();
if (daemon)
pidfile_remove();
return ret;
}
