main.c

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/*
 * Copyright (c) 2002-2006 MontaVista Software, Inc.
 * Copyright (c) 2006-2021 Red Hat, Inc.
 *
 * All rights reserved.
 *
 * Author: Steven Dake (sdake@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 <pthread.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/poll.h>
#include <sys/uio.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <sched.h>
#include <time.h>
#include <semaphore.h>
#include <string.h>
 
#ifdef HAVE_LIBSYSTEMD
#include <systemd/sd-daemon.h>
#endif
 
#include <qb/qbdefs.h>
#include <qb/qblog.h>
#include <qb/qbloop.h>
#include <qb/qbutil.h>
#include <qb/qbipcs.h>
 
#include <corosync/swab.h>
#include <corosync/corotypes.h>
#include <corosync/corodefs.h>
#include <corosync/totem/totempg.h>
#include <corosync/logsys.h>
#include <corosync/icmap.h>
 
#include "quorum.h"
#include "totemsrp.h"
#include "logconfig.h"
#include "totemconfig.h"
#include "main.h"
#include "sync.h"
#include "timer.h"
#include "util.h"
#include "apidef.h"
#include "service.h"
#include "schedwrk.h"
#include "ipcs_stats.h"
#include "stats.h"
 
#ifdef HAVE_SMALL_MEMORY_FOOTPRINT
#define IPC_LOGSYS_SIZE                 1024*64
#else
#define IPC_LOGSYS_SIZE                 8192*128
#endif
 
/*
 * LibQB adds default "*" syslog filter so we have to set syslog_priority as low
 * as possible so filters applied later in _logsys_config_apply_per_file takes
 * effect.
 */
LOGSYS_DECLARE_SYSTEM ("corosync",
        LOGSYS_MODE_OUTPUT_STDERR | LOGSYS_MODE_OUTPUT_SYSLOG,
        LOG_DAEMON,
        LOG_EMERG);
 
LOGSYS_DECLARE_SUBSYS ("MAIN");
 
#define SERVER_BACKLOG 5
 
static int sched_priority = 0;
 
static unsigned int service_count = 32;
 
static struct totem_logging_configuration totem_logging_configuration;
 
static struct corosync_api_v1 *api = NULL;
 
static int sync_in_process = 1;
 
static qb_loop_t *corosync_poll_handle;
 
struct sched_param global_sched_param;
 
static corosync_timer_handle_t corosync_stats_timer_handle;
 
static const char *corosync_lock_file = LOCALSTATEDIR"/run/corosync.pid";
 
static char corosync_config_file[PATH_MAX + 1] = COROSYSCONFDIR "/corosync.conf";
 
static int lockfile_fd = -1;
 
enum move_to_root_cgroup_mode {
        MOVE_TO_ROOT_CGROUP_MODE_OFF = 0,
        MOVE_TO_ROOT_CGROUP_MODE_ON = 1,
        MOVE_TO_ROOT_CGROUP_MODE_AUTO = 2,
};
 
qb_loop_t *cs_poll_handle_get (void)
{
        return (corosync_poll_handle);
}
 
int cs_poll_dispatch_add (qb_loop_t * handle,
                int fd,
                int events,
                void *data,
 
                int (*dispatch_fn) (int fd,
                        int revents,
                        void *data))
{
        return qb_loop_poll_add(handle, QB_LOOP_MED, fd, events, data,
                                dispatch_fn);
}
 
int cs_poll_dispatch_delete(qb_loop_t * handle, int fd)
{
        return qb_loop_poll_del(handle, fd);
}
 
void corosync_state_dump (void)
{
        int i;
 
        for (i = 0; i < SERVICES_COUNT_MAX; i++) {
                if (corosync_service[i] && corosync_service[i]->exec_dump_fn) {
                        corosync_service[i]->exec_dump_fn ();
                }
        }
}
 
const char *corosync_get_config_file(void)
{
 
        return (corosync_config_file);
}
 
static void corosync_blackbox_write_to_file (void)
{
        char fname[PATH_MAX];
        char fdata_fname[PATH_MAX];
        char time_str[PATH_MAX];
        struct tm cur_time_tm;
        time_t cur_time_t;
        ssize_t res;
 
        cur_time_t = time(NULL);
        localtime_r(&cur_time_t, &cur_time_tm);
 
        strftime(time_str, PATH_MAX, "%Y-%m-%dT%H:%M:%S", &cur_time_tm);
        if (snprintf(fname, PATH_MAX, "%s/fdata-%s-%lld",
            get_state_dir(),
            time_str,
            (long long int)getpid()) >= PATH_MAX) {
                log_printf(LOGSYS_LEVEL_ERROR, "Can't snprintf blackbox file name");
                return ;
        }
 
        if ((res = qb_log_blackbox_write_to_file(fname)) < 0) {
                LOGSYS_PERROR(-res, LOGSYS_LEVEL_ERROR, "Can't store blackbox file");
                return ;
        }
        snprintf(fdata_fname, sizeof(fdata_fname), "%s/fdata", get_state_dir());
        unlink(fdata_fname);
        if (symlink(fname, fdata_fname) == -1) {
                log_printf(LOGSYS_LEVEL_ERROR, "Can't create symlink to '%s' for corosync blackbox file '%s'",
                    fname, fdata_fname);
        }
}
 
static void unlink_all_completed (void)
{
        api->timer_delete (corosync_stats_timer_handle);
        qb_loop_stop (corosync_poll_handle);
        icmap_fini();
}
 
void corosync_shutdown_request (void)
{
        corosync_service_unlink_all (api, unlink_all_completed);
}
 
static int32_t sig_diag_handler (int num, void *data)
{
        corosync_state_dump ();
        return 0;
}
 
static int32_t sig_exit_handler (int num, void *data)
{
        log_printf(LOGSYS_LEVEL_NOTICE, "Node was shut down by a signal");
        corosync_service_unlink_all (api, unlink_all_completed);
        return 0;
}
 
static void sigsegv_handler (int num)
{
        (void)signal (num, SIG_DFL);
        corosync_blackbox_write_to_file ();
        qb_log_fini();
        raise (num);
}
 
#define LOCALHOST_IP inet_addr("127.0.0.1")
 
static void *corosync_group_handle;
 
static struct totempg_group corosync_group = {
        .group          = "a",
        .group_len      = 1
};
 
static void serialize_lock (void)
{
}
 
static void serialize_unlock (void)
{
}
 
static void corosync_sync_completed (void)
{
        log_printf (LOGSYS_LEVEL_NOTICE,
                "Completed service synchronization, ready to provide service.");
        sync_in_process = 0;
 
        cs_ipcs_sync_state_changed(sync_in_process);
        cs_ipc_allow_connections(1);
        /*
         * Inform totem to start using new message queue again
         */
        totempg_trans_ack();
 
#ifdef HAVE_LIBSYSTEMD
        sd_notify (0, "READY=1");
#endif
}
 
static int corosync_sync_callbacks_retrieve (
        int service_id,
        struct sync_callbacks *callbacks)
{
        if (corosync_service[service_id] == NULL) {
                return (-1);
        }
 
        if (callbacks == NULL) {
                return (0);
        }
 
        callbacks->name = corosync_service[service_id]->name;
 
        callbacks->sync_init = corosync_service[service_id]->sync_init;
        callbacks->sync_process = corosync_service[service_id]->sync_process;
        callbacks->sync_activate = corosync_service[service_id]->sync_activate;
        callbacks->sync_abort = corosync_service[service_id]->sync_abort;
        return (0);
}
 
static struct memb_ring_id corosync_ring_id;
 
static void member_object_joined (unsigned int nodeid)
{
        char member_ip[ICMAP_KEYNAME_MAXLEN];
        char member_join_count[ICMAP_KEYNAME_MAXLEN];
        char member_status[ICMAP_KEYNAME_MAXLEN];
 
        snprintf(member_ip, ICMAP_KEYNAME_MAXLEN,
                "runtime.members.%u.ip", nodeid);
        snprintf(member_join_count, ICMAP_KEYNAME_MAXLEN,
                "runtime.members.%u.join_count", nodeid);
        snprintf(member_status, ICMAP_KEYNAME_MAXLEN,
                "runtime.members.%u.status", nodeid);
 
        if (icmap_get(member_ip, NULL, NULL, NULL) == CS_OK) {
                icmap_inc(member_join_count);
                icmap_set_string(member_status, "joined");
        } else {
                icmap_set_string(member_ip, (char*)api->totem_ifaces_print (nodeid));
                icmap_set_uint32(member_join_count, 1);
                icmap_set_string(member_status, "joined");
        }
 
        log_printf (LOGSYS_LEVEL_DEBUG,
                "Member joined: %s", api->totem_ifaces_print (nodeid));
}
 
static void member_object_left (unsigned int nodeid)
{
        char member_status[ICMAP_KEYNAME_MAXLEN];
 
        snprintf(member_status, ICMAP_KEYNAME_MAXLEN,
                "runtime.members.%u.status", nodeid);
        icmap_set_string(member_status, "left");
 
        log_printf (LOGSYS_LEVEL_DEBUG,
                "Member left: %s", api->totem_ifaces_print (nodeid));
}
 
static void confchg_fn (
        enum totem_configuration_type configuration_type,
        const unsigned int *member_list, size_t member_list_entries,
        const unsigned int *left_list, size_t left_list_entries,
        const unsigned int *joined_list, size_t joined_list_entries,
        const struct memb_ring_id *ring_id)
{
        int i;
        int abort_activate = 0;
 
        if (sync_in_process == 1) {
                abort_activate = 1;
        }
        sync_in_process = 1;
        cs_ipcs_sync_state_changed(sync_in_process);
        memcpy (&corosync_ring_id, ring_id, sizeof (struct memb_ring_id));
 
        for (i = 0; i < left_list_entries; i++) {
                member_object_left (left_list[i]);
        }
        for (i = 0; i < joined_list_entries; i++) {
                member_object_joined (joined_list[i]);
        }
        /*
         * Call configuration change for all services
         */
        for (i = 0; i < service_count; i++) {
                if (corosync_service[i] && corosync_service[i]->confchg_fn) {
                        corosync_service[i]->confchg_fn (configuration_type,
                                member_list, member_list_entries,
                                left_list, left_list_entries,
                                joined_list, joined_list_entries, ring_id);
                }
        }
 
        if (abort_activate) {
                sync_abort ();
        }
        if (configuration_type == TOTEM_CONFIGURATION_TRANSITIONAL) {
                sync_save_transitional (member_list, member_list_entries, ring_id);
        }
        if (configuration_type == TOTEM_CONFIGURATION_REGULAR) {
                sync_start (member_list, member_list_entries, ring_id);
        }
}
 
static void priv_drop (void)
{
        return; /* TODO: we are still not dropping privs */
}
 
static void corosync_tty_detach (void)
{
        int devnull;
 
        /*
         * Disconnect from TTY if this is not a debug run
         */
 
        switch (fork ()) {
                case -1:
                        corosync_exit_error (COROSYNC_DONE_FORK);
                        break;
                case 0:
                        /*
                         * child which is disconnected, run this process
                         */
                        break;
                default:
                        exit (0);
                        break;
        }
 
        /* Create new session */
        (void)setsid();
 
        /*
         * Map stdin/out/err to /dev/null.
         */
        devnull = open("/dev/null", O_RDWR);
        if (devnull == -1) {
                corosync_exit_error (COROSYNC_DONE_STD_TO_NULL_REDIR);
        }
 
        if (dup2(devnull, 0) < 0 || dup2(devnull, 1) < 0
            || dup2(devnull, 2) < 0) {
                close(devnull);
                corosync_exit_error (COROSYNC_DONE_STD_TO_NULL_REDIR);
        }
        close(devnull);
}
 
static void corosync_mlockall (void)
{
        int res;
        struct rlimit rlimit;
 
        rlimit.rlim_cur = RLIM_INFINITY;
        rlimit.rlim_max = RLIM_INFINITY;
 
#ifndef RLIMIT_MEMLOCK
#define RLIMIT_MEMLOCK RLIMIT_VMEM
#endif
 
        res = setrlimit (RLIMIT_MEMLOCK, &rlimit);
        if (res == -1) {
                LOGSYS_PERROR (errno, LOGSYS_LEVEL_WARNING,
                        "Could not increase RLIMIT_MEMLOCK, not locking memory");
                return;
        }
 
        res = mlockall (MCL_CURRENT | MCL_FUTURE);
        if (res == -1) {
                LOGSYS_PERROR (errno, LOGSYS_LEVEL_WARNING,
                        "Could not lock memory of service to avoid page faults");
        };
}
 
 
static void corosync_totem_stats_updater (void *data)
{
        totempg_stats_t * stats;
        uint32_t total_mtt_rx_token;
        uint32_t total_backlog_calc;
        uint32_t total_token_holdtime;
        int t, prev;
        int32_t token_count;
        const char *cstr;
 
        stats = api->totem_get_stats();
 
 
        stats->srp->firewall_enabled_or_nic_failure = stats->srp->continuous_gather > MAX_NO_CONT_GATHER ? 1 : 0;
 
        if (stats->srp->continuous_gather > MAX_NO_CONT_GATHER ||
            stats->srp->continuous_sendmsg_failures > MAX_NO_CONT_SENDMSG_FAILURES) {
                cstr = "";
 
                if (stats->srp->continuous_sendmsg_failures > MAX_NO_CONT_SENDMSG_FAILURES) {
                        cstr = "number of multicast sendmsg failures is above threshold";
                }
 
                if (stats->srp->continuous_gather > MAX_NO_CONT_GATHER) {
                        cstr = "totem is continuously in gather state";
                }
 
                log_printf (LOGSYS_LEVEL_WARNING,
                        "Totem is unable to form a cluster because of an "
                        "operating system or network fault (reason: %s). The most common "
                        "cause of this message is that the local firewall is "
                        "configured improperly.", cstr);
                stats->srp->firewall_enabled_or_nic_failure = 1;
        } else {
                stats->srp->firewall_enabled_or_nic_failure = 0;
        }
 
        total_mtt_rx_token = 0;
        total_token_holdtime = 0;
        total_backlog_calc = 0;
        token_count = 0;
        t = stats->srp->latest_token;
        while (1) {
                if (t == 0)
                        prev = TOTEM_TOKEN_STATS_MAX - 1;
                else
                        prev = t - 1;
                if (prev == stats->srp->earliest_token)
                        break;
                /* if tx == 0, then dropped token (not ours) */
                if (stats->srp->token[t].tx != 0 ||
                        (stats->srp->token[t].rx - stats->srp->token[prev].rx) > 0 ) {
                        total_mtt_rx_token += (stats->srp->token[t].rx - stats->srp->token[prev].rx);
                        total_token_holdtime += (stats->srp->token[t].tx - stats->srp->token[t].rx);
                        total_backlog_calc += stats->srp->token[t].backlog_calc;
                        token_count++;
                }
                t = prev;
        }
        if (token_count) {
                stats->srp->mtt_rx_token = (total_mtt_rx_token / token_count);
                stats->srp->avg_token_workload = (total_token_holdtime / token_count);
                stats->srp->avg_backlog_calc = (total_backlog_calc / token_count);
        }
 
        stats->srp->time_since_token_last_received = qb_util_nano_current_get () / QB_TIME_NS_IN_MSEC -
                stats->srp->token[stats->srp->latest_token].rx;
 
        stats_trigger_trackers();
 
        api->timer_add_duration (1500 * MILLI_2_NANO_SECONDS, NULL,
                corosync_totem_stats_updater,
                &corosync_stats_timer_handle);
}
 
static void corosync_totem_stats_init (void)
{
        /* start stats timer */
        api->timer_add_duration (1500 * MILLI_2_NANO_SECONDS, NULL,
                corosync_totem_stats_updater,
                &corosync_stats_timer_handle);
}
 
static void deliver_fn (
        unsigned int nodeid,
        const void *msg,
        unsigned int msg_len,
        int endian_conversion_required)
{
        const struct qb_ipc_request_header *header;
        int32_t service;
        int32_t fn_id;
        uint32_t id;
 
        header = msg;
        if (endian_conversion_required) {
                id = swab32 (header->id);
        } else {
                id = header->id;
        }
 
        /*
         * Call the proper executive handler
         */
        service = id >> 16;
        fn_id = id & 0xffff;
 
        if (!corosync_service[service]) {
                return;
        }
        if (fn_id >= corosync_service[service]->exec_engine_count) {
                log_printf(LOGSYS_LEVEL_WARNING, "discarded unknown message %d for service %d (max id %d)",
                        fn_id, service, corosync_service[service]->exec_engine_count);
                return;
        }
 
        icmap_fast_inc(service_stats_rx[service][fn_id]);
 
        if (endian_conversion_required) {
                assert(corosync_service[service]->exec_engine[fn_id].exec_endian_convert_fn != NULL);
                corosync_service[service]->exec_engine[fn_id].exec_endian_convert_fn
                        ((void *)msg);
        }
 
        corosync_service[service]->exec_engine[fn_id].exec_handler_fn
                (msg, nodeid);
}
 
int main_mcast (
        const struct iovec *iovec,
        unsigned int iov_len,
        unsigned int guarantee)
{
        const struct qb_ipc_request_header *req = iovec->iov_base;
        int32_t service;
        int32_t fn_id;
 
        service = req->id >> 16;
        fn_id = req->id & 0xffff;
 
        if (corosync_service[service]) {
                icmap_fast_inc(service_stats_tx[service][fn_id]);
        }
 
        return (totempg_groups_mcast_joined (corosync_group_handle, iovec, iov_len, guarantee));
}
 
static void corosync_ring_id_create_or_load (
        struct memb_ring_id *memb_ring_id,
        unsigned int nodeid)
{
        int fd;
        int res = 0;
        char filename[PATH_MAX];
 
        snprintf (filename, sizeof(filename), "%s/ringid_%u",
                get_state_dir(), nodeid);
        fd = open (filename, O_RDONLY);
        /*
         * If file can be opened and read, read the ring id
         */
        if (fd != -1) {
                res = read (fd, &memb_ring_id->seq, sizeof (uint64_t));
                close (fd);
        }
        /*
         * If file could not be opened or read, create a new ring id
         */
        if ((fd == -1) || (res != sizeof (uint64_t))) {
                memb_ring_id->seq = 0;
                fd = creat (filename, 0600);
                if (fd != -1) {
                        res = write (fd, &memb_ring_id->seq, sizeof (uint64_t));
                        close (fd);
                        if (res == -1) {
                                LOGSYS_PERROR (errno, LOGSYS_LEVEL_ERROR,
                                        "Couldn't write ringid file '%s'", filename);
 
                                corosync_exit_error (COROSYNC_DONE_STORE_RINGID);
                        }
                } else {
                        LOGSYS_PERROR (errno, LOGSYS_LEVEL_ERROR,
                                "Couldn't create ringid file '%s'", filename);
 
                        corosync_exit_error (COROSYNC_DONE_STORE_RINGID);
                }
        }
 
        memb_ring_id->rep = nodeid;
}
 
static void corosync_ring_id_store (
        const struct memb_ring_id *memb_ring_id,
        unsigned int nodeid)
{
        char filename[PATH_MAX];
        int fd;
        int res;
 
        snprintf (filename, sizeof(filename), "%s/ringid_%u",
                get_state_dir(), nodeid);
 
        fd = creat (filename, 0600);
        if (fd == -1) {
                LOGSYS_PERROR(errno, LOGSYS_LEVEL_ERROR,
                        "Couldn't store new ring id " CS_PRI_RING_ID_SEQ " to stable storage",
                            memb_ring_id->seq);
 
                corosync_exit_error (COROSYNC_DONE_STORE_RINGID);
        }
        log_printf (LOGSYS_LEVEL_DEBUG,
                "Storing new sequence id for ring " CS_PRI_RING_ID_SEQ, memb_ring_id->seq);
        res = write (fd, &memb_ring_id->seq, sizeof(memb_ring_id->seq));
        close (fd);
        if (res != sizeof(memb_ring_id->seq)) {
                LOGSYS_PERROR(errno, LOGSYS_LEVEL_ERROR,
                        "Couldn't store new ring id " CS_PRI_RING_ID_SEQ " to stable storage",
                        memb_ring_id->seq);
 
                corosync_exit_error (COROSYNC_DONE_STORE_RINGID);
        }
}
 
static qb_loop_timer_handle recheck_the_q_level_timer;
void corosync_recheck_the_q_level(void *data)
{
        totempg_check_q_level(corosync_group_handle);
        if (cs_ipcs_q_level_get() == TOTEM_Q_LEVEL_CRITICAL) {
                qb_loop_timer_add(cs_poll_handle_get(), QB_LOOP_MED, 1*QB_TIME_NS_IN_MSEC,
                        NULL, corosync_recheck_the_q_level, &recheck_the_q_level_timer);
        }
}
 
struct sending_allowed_private_data_struct {
        int reserved_msgs;
};
 
 
int corosync_sending_allowed (
        unsigned int service,
        unsigned int id,
        const void *msg,
        void *sending_allowed_private_data)
{
        struct sending_allowed_private_data_struct *pd =
                (struct sending_allowed_private_data_struct *)sending_allowed_private_data;
        struct iovec reserve_iovec;
        struct qb_ipc_request_header *header = (struct qb_ipc_request_header *)msg;
        int sending_allowed;
 
        reserve_iovec.iov_base = (char *)header;
        reserve_iovec.iov_len = header->size;
 
        pd->reserved_msgs = totempg_groups_joined_reserve (
                corosync_group_handle,
                &reserve_iovec, 1);
        if (pd->reserved_msgs == -1) {
                return -EINVAL;
        }
 
        /* Message ID out of range */
        if (id >= corosync_service[service]->lib_engine_count) {
                return -EINVAL;
        }
 
        sending_allowed = QB_FALSE;
        if (corosync_quorum_is_quorate() == 1 ||
            corosync_service[service]->allow_inquorate == CS_LIB_ALLOW_INQUORATE) {
                // we are quorate
                // now check flow control
                if (corosync_service[service]->lib_engine[id].flow_control == CS_LIB_FLOW_CONTROL_NOT_REQUIRED) {
                        sending_allowed = QB_TRUE;
                } else if (pd->reserved_msgs && sync_in_process == 0) {
                        sending_allowed = QB_TRUE;
                } else if (pd->reserved_msgs == 0) {
                        return -ENOBUFS;
                } else /* (sync_in_process) */ {
                        return -EINPROGRESS;
                }
        } else {
                return -EHOSTUNREACH;
        }
 
        return (sending_allowed);
}
 
void corosync_sending_allowed_release (void *sending_allowed_private_data)
{
        struct sending_allowed_private_data_struct *pd =
                (struct sending_allowed_private_data_struct *)sending_allowed_private_data;
 
        if (pd->reserved_msgs == -1) {
                return;
        }
        totempg_groups_joined_release (pd->reserved_msgs);
}
 
int message_source_is_local (const mar_message_source_t *source)
{
        int ret = 0;
 
        assert (source != NULL);
        if (source->nodeid == totempg_my_nodeid_get ()) {
                ret = 1;
        }
        return ret;
}
 
void message_source_set (
        mar_message_source_t *source,
        void *conn)
{
        assert ((source != NULL) && (conn != NULL));
        memset (source, 0, sizeof (mar_message_source_t));
        source->nodeid = totempg_my_nodeid_get ();
        source->conn = conn;
}
 
struct scheduler_pause_timeout_data {
        struct totem_config *totem_config;
        qb_loop_timer_handle handle;
        unsigned long long tv_prev;
        unsigned long long max_tv_diff;
};
 
static void timer_function_scheduler_timeout (void *data)
{
        struct scheduler_pause_timeout_data *timeout_data = (struct scheduler_pause_timeout_data *)data;
        unsigned long long tv_current;
        unsigned long long tv_diff;
        uint64_t schedmiss_event_tstamp;
 
        tv_current = qb_util_nano_current_get ();
 
        if (timeout_data->tv_prev == 0) {
                /*
                 * Initial call -> just pretent everything is ok
                 */
                timeout_data->tv_prev = tv_current;
                timeout_data->max_tv_diff = 0;
        }
 
        tv_diff = tv_current - timeout_data->tv_prev;
        timeout_data->tv_prev = tv_current;
 
        if (tv_diff > timeout_data->max_tv_diff) {
                schedmiss_event_tstamp = qb_util_nano_from_epoch_get() / QB_TIME_NS_IN_MSEC;
 
                log_printf (LOGSYS_LEVEL_WARNING, "Corosync main process was not scheduled (@%" PRIu64 ") for %0.4f ms "
                    "(threshold is %0.4f ms). Consider token timeout increase.",
                    schedmiss_event_tstamp,
                    (float)tv_diff / QB_TIME_NS_IN_MSEC, (float)timeout_data->max_tv_diff / QB_TIME_NS_IN_MSEC);
 
                stats_add_schedmiss_event(schedmiss_event_tstamp, (float)tv_diff / QB_TIME_NS_IN_MSEC);
        }
 
        /*
         * Set next threshold, because token_timeout can change
         */
        timeout_data->max_tv_diff = timeout_data->totem_config->token_timeout * QB_TIME_NS_IN_MSEC * 0.8;
        qb_loop_timer_add (corosync_poll_handle,
                QB_LOOP_MED,
                timeout_data->totem_config->token_timeout * QB_TIME_NS_IN_MSEC / 3,
                timeout_data,
                timer_function_scheduler_timeout,
                &timeout_data->handle);
}
 
 
/*
 * Set main pid RR scheduler.
 * silent: don't log sched_get_priority_max and sched_setscheduler errors
 * Returns: 0 - success, -1 failure, -2 platform doesn't support SCHED_RR
 */
static int corosync_set_rr_scheduler (int silent)
{
        int ret_val = 0;
 
#if defined(HAVE_PTHREAD_SETSCHEDPARAM) && defined(HAVE_SCHED_GET_PRIORITY_MAX) && defined(HAVE_SCHED_SETSCHEDULER)
        int res;
 
        sched_priority = sched_get_priority_max (SCHED_RR);
        if (sched_priority != -1) {
                global_sched_param.sched_priority = sched_priority;
                res = sched_setscheduler (0, SCHED_RR, &global_sched_param);
                if (res == -1) {
                        if (!silent) {
                                LOGSYS_PERROR(errno, LOGSYS_LEVEL_WARNING,
                                        "Could not set SCHED_RR at priority %d",
                                        global_sched_param.sched_priority);
                        }
 
                        global_sched_param.sched_priority = 0;
#ifdef HAVE_QB_LOG_THREAD_PRIORITY_SET
                        qb_log_thread_priority_set (SCHED_OTHER, 0);
#endif
                        ret_val = -1;
                } else {
 
                        /*
                         * Turn on SCHED_RR in logsys system
                         */
#ifdef HAVE_QB_LOG_THREAD_PRIORITY_SET
                        res = qb_log_thread_priority_set (SCHED_RR, sched_priority);
#else
                        res = -1;
#endif
                        if (res == -1) {
                                log_printf (LOGSYS_LEVEL_ERROR,
                                            "Could not set logsys thread priority."
                                            " Can't continue because of priority inversions.");
                                corosync_exit_error (COROSYNC_DONE_LOGSETUP);
                        }
                }
        } else {
                if (!silent) {
                        LOGSYS_PERROR (errno, LOGSYS_LEVEL_WARNING,
                                "Could not get maximum scheduler priority");
                }
                sched_priority = 0;
                ret_val = -1;
        }
#else
        log_printf(LOGSYS_LEVEL_WARNING,
                "The Platform is missing process priority setting features.  Leaving at default.");
        ret_val = -2;
#endif
 
        return (ret_val);
}
 
 
/* The basename man page contains scary warnings about
   thread-safety and portability, hence this */
static const char *corosync_basename(const char *file_name)
{
        char *base;
        base = strrchr (file_name, '/');
        if (base) {
                return base + 1;
        }
 
        return file_name;
}
 
static void
_logsys_log_printf(int level, int subsys,
                const char *function_name,
                const char *file_name,
                int file_line,
                const char *format,
                ...) __attribute__((format(printf, 6, 7)));
 
static void
_logsys_log_printf(int level, int subsys,
                const char *function_name,
                const char *file_name,
                int file_line,
                const char *format, ...)
{
        va_list ap;
 
        va_start(ap, format);
        qb_log_from_external_source_va(function_name, corosync_basename(file_name),
                                    format, level, file_line,
                                    subsys, ap);
        va_end(ap);
}
 
static void fplay_key_change_notify_fn (
        int32_t event,
        const char *key_name,
        struct icmap_notify_value new_val,
        struct icmap_notify_value old_val,
        void *user_data)
{
        if (strcmp(key_name, "runtime.blackbox.dump_flight_data") == 0) {
                fprintf(stderr,"Writetofile\n");
                corosync_blackbox_write_to_file ();
        }
        if (strcmp(key_name, "runtime.blackbox.dump_state") == 0) {
                fprintf(stderr,"statefump\n");
                corosync_state_dump ();
        }
}
 
static void corosync_fplay_control_init (void)
{
        icmap_track_t track = NULL;
 
        icmap_set_string("runtime.blackbox.dump_flight_data", "no");
        icmap_set_string("runtime.blackbox.dump_state", "no");
 
        icmap_track_add("runtime.blackbox.dump_flight_data",
                        ICMAP_TRACK_ADD | ICMAP_TRACK_DELETE | ICMAP_TRACK_MODIFY,
                        fplay_key_change_notify_fn,
                        NULL, &track);
        icmap_track_add("runtime.blackbox.dump_state",
                        ICMAP_TRACK_ADD | ICMAP_TRACK_DELETE | ICMAP_TRACK_MODIFY,
                        fplay_key_change_notify_fn,
                        NULL, &track);
}
 
static void force_gather_notify_fn(
        int32_t event,
        const char *key_name,
        struct icmap_notify_value new_val,
        struct icmap_notify_value old_val,
        void *user_data)
{
        char *key_val;
 
        if (icmap_get_string(key_name, &key_val) == CS_OK && strcmp(key_val, "no") == 0)
                goto out;
 
        icmap_set_string("runtime.force_gather", "no");
 
        if (strcmp(key_name, "runtime.force_gather") == 0) {
                log_printf(LOGSYS_LEVEL_ERROR, "Forcing into GATHER state\n");
                totempg_force_gather();
        }
 
out:
        free(key_val);
}
 
static void corosync_force_gather_init (void)
{
        icmap_track_t track = NULL;
 
        icmap_set_string("runtime.force_gather", "no");
 
        icmap_track_add("runtime.force_gather",
                        ICMAP_TRACK_ADD | ICMAP_TRACK_DELETE | ICMAP_TRACK_MODIFY,
                        force_gather_notify_fn,
                        NULL, &track);
}
 
/*
 * Set RO flag for keys, which ether doesn't make sense to change by user (statistic)
 * or which when changed are not reflected by runtime (totem.crypto_cipher, ...).
 *
 * Also some RO keys cannot be determined in this stage, so they are set later in
 * other functions (like nodelist.local_node_pos, ...)
 */
static void set_icmap_ro_keys_flag (void)
{
        /*
         * Set RO flag for all keys of internal configuration and runtime statistics
         */
        icmap_set_ro_access("internal_configuration.", CS_TRUE, CS_TRUE);
        icmap_set_ro_access("runtime.services.", CS_TRUE, CS_TRUE);
        icmap_set_ro_access("runtime.config.", CS_TRUE, CS_TRUE);
        icmap_set_ro_access("runtime.totem.", CS_TRUE, CS_TRUE);
        icmap_set_ro_access("uidgid.config.", CS_TRUE, CS_TRUE);
        icmap_set_ro_access("system.", CS_TRUE, CS_TRUE);
        icmap_set_ro_access("nodelist.", CS_TRUE, CS_TRUE);
 
        /*
         * Set RO flag for constrete keys of configuration which can't be changed
         * during runtime
         */
        icmap_set_ro_access("totem.crypto_cipher", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.crypto_hash", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.crypto_model", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.keyfile", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.key", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.secauth", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.ip_version", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.rrp_mode", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.transport", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.cluster_name", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.netmtu", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.threads", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.version", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.nodeid", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("totem.clear_node_high_bit", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("config.reload_in_progress", CS_FALSE, CS_TRUE);
        icmap_set_ro_access("config.totemconfig_reload_in_progress", CS_FALSE, CS_TRUE);
}
 
static void main_service_ready (void)
{
        int res;
 
        /*
         * This must occur after totempg is initialized because "this_ip" must be set
         */
        res = corosync_service_defaults_link_and_init (api);
        if (res == -1) {
                log_printf (LOGSYS_LEVEL_ERROR, "Could not initialize default services");
                corosync_exit_error (COROSYNC_DONE_INIT_SERVICES);
        }
        cs_ipcs_init();
        corosync_totem_stats_init ();
        corosync_fplay_control_init ();
        corosync_force_gather_init ();
 
        sync_init (
                corosync_sync_callbacks_retrieve,
                corosync_sync_completed);
}
 
static enum e_corosync_done corosync_flock (const char *lockfile, pid_t pid)
{
        struct flock lock;
        enum e_corosync_done err;
        char pid_s[17];
        int fd_flag;
 
        err = COROSYNC_DONE_EXIT;
 
        lockfile_fd = open (lockfile, O_WRONLY | O_CREAT, 0640);
        if (lockfile_fd == -1) {
                log_printf (LOGSYS_LEVEL_ERROR, "Corosync Executive couldn't create lock file.");
                return (COROSYNC_DONE_ACQUIRE_LOCK);
        }
 
retry_fcntl:
        lock.l_type = F_WRLCK;
        lock.l_start = 0;
        lock.l_whence = SEEK_SET;
        lock.l_len = 0;
        if (fcntl (lockfile_fd, F_SETLK, &lock) == -1) {
                switch (errno) {
                case EINTR:
                        goto retry_fcntl;
                        break;
                case EAGAIN:
                case EACCES:
                        log_printf (LOGSYS_LEVEL_ERROR, "Another Corosync instance is already running.");
                        err = COROSYNC_DONE_ALREADY_RUNNING;
                        goto error_close;
                        break;
                default:
                        log_printf (LOGSYS_LEVEL_ERROR, "Corosync Executive couldn't acquire lock. Error was %s",
                            strerror(errno));
                        err = COROSYNC_DONE_ACQUIRE_LOCK;
                        goto error_close;
                        break;
                }
        }
 
        if (ftruncate (lockfile_fd, 0) == -1) {
                log_printf (LOGSYS_LEVEL_ERROR, "Corosync Executive couldn't truncate lock file. Error was %s",
                    strerror (errno));
                err = COROSYNC_DONE_ACQUIRE_LOCK;
                goto error_close_unlink;
        }
 
        memset (pid_s, 0, sizeof (pid_s));
        snprintf (pid_s, sizeof (pid_s) - 1, "%u\n", pid);
 
retry_write:
        if (write (lockfile_fd, pid_s, strlen (pid_s)) != strlen (pid_s)) {
                if (errno == EINTR) {
                        goto retry_write;
                } else {
                        log_printf (LOGSYS_LEVEL_ERROR, "Corosync Executive couldn't write pid to lock file. "
                                "Error was %s", strerror (errno));
                        err = COROSYNC_DONE_ACQUIRE_LOCK;
                        goto error_close_unlink;
                }
        }
 
        if ((fd_flag = fcntl (lockfile_fd, F_GETFD, 0)) == -1) {
                log_printf (LOGSYS_LEVEL_ERROR, "Corosync Executive couldn't get close-on-exec flag from lock file. "
                        "Error was %s", strerror (errno));
                err = COROSYNC_DONE_ACQUIRE_LOCK;
                goto error_close_unlink;
        }
        fd_flag |= FD_CLOEXEC;
        if (fcntl (lockfile_fd, F_SETFD, fd_flag) == -1) {
                log_printf (LOGSYS_LEVEL_ERROR, "Corosync Executive couldn't set close-on-exec flag to lock file. "
                        "Error was %s", strerror (errno));
                err = COROSYNC_DONE_ACQUIRE_LOCK;
                goto error_close_unlink;
        }
 
        return (err);
 
error_close_unlink:
        unlink (lockfile);
error_close:
        close (lockfile_fd);
 
        return (err);
}
 
static int corosync_move_to_root_cgroup(void) {
        FILE *f;
        int res = -1;
        const char *cgroup_task_fname = NULL;
 
        /*
         * /sys/fs/cgroup is hardcoded, because most of Linux distributions are now
         * using systemd and systemd uses hardcoded path of cgroup mount point.
         *
         * This feature is expected to be removed as soon as systemd gets support
         * for managing RT configuration.
         */
        f = fopen("/sys/fs/cgroup/cpu/cpu.rt_runtime_us", "rt");
        if (f == NULL) {
                /*
                 * Try cgroup v2
                 */
                f = fopen("/sys/fs/cgroup/cgroup.procs", "rt");
                if (f == NULL) {
                        log_printf(LOG_DEBUG, "cpu.rt_runtime_us or cgroup.procs doesn't exist -> "
                            "system without cgroup or with disabled CONFIG_RT_GROUP_SCHED");
 
                        res = 0;
                        goto exit_res;
                } else {
                        log_printf(LOGSYS_LEVEL_DEBUG, "Moving main pid to cgroup v2 root cgroup");
 
                        cgroup_task_fname = "/sys/fs/cgroup/cgroup.procs";
                }
        } else {
                log_printf(LOGSYS_LEVEL_DEBUG, "Moving main pid to cgroup v1 root cgroup");
 
                cgroup_task_fname = "/sys/fs/cgroup/cpu/tasks";
        }
        (void)fclose(f);
 
        f = fopen(cgroup_task_fname, "w");
        if (f == NULL) {
                log_printf(LOGSYS_LEVEL_WARNING, "Can't open cgroups tasks file for writing");
 
                goto exit_res;
        }
 
        if (fprintf(f, "%jd\n", (intmax_t)getpid()) <= 0) {
                log_printf(LOGSYS_LEVEL_WARNING, "Can't write corosync pid into cgroups tasks file");
 
                goto close_and_exit_res;
        }
 
close_and_exit_res:
        if (fclose(f) != 0) {
                log_printf(LOGSYS_LEVEL_WARNING, "Can't close cgroups tasks file");
 
                goto exit_res;
        }
 
exit_res:
         return (res);
}
 
static void show_version_info_crypto(void)
{
        const char *error_string;
        const char *list_str;
 
        if (util_is_valid_knet_crypto_model(NULL, &list_str, 1, "", &error_string) != -1) {
                printf("Available crypto models: %s\n", list_str);
        } else {
                perror(error_string);
        }
}
 
static void show_version_info_compress(void)
{
        const char *error_string;
        const char *list_str;
 
        if (util_is_valid_knet_compress_model(NULL, &list_str, 1, "", &error_string) != -1) {
                printf("Available compression models: %s\n", list_str);
        } else {
                perror(error_string);
        }
}
 
static void show_version_info(void)
{
 
        printf ("Corosync Cluster Engine, version '%s'\n", VERSION);
        printf ("Copyright (c) 2006-2021 Red Hat, Inc.\n");
 
        printf ("\nBuilt-in features:" PACKAGE_FEATURES "\n");
 
        show_version_info_crypto();
        show_version_info_compress();
}
 
int main (int argc, char **argv, char **envp)
{
        const char *error_string;
        struct totem_config totem_config;
        int res, ch;
        int background, sched_rr, prio, testonly;
        enum move_to_root_cgroup_mode move_to_root_cgroup;
        enum e_corosync_done flock_err;
        uint64_t totem_config_warnings;
        struct scheduler_pause_timeout_data scheduler_pause_timeout_data;
        long int tmpli;
        char *ep;
        char *tmp_str;
        int log_subsys_id_totem;
        int silent;
 
        /* default configuration
         */
        background = 1;
        testonly = 0;
 
        while ((ch = getopt (argc, argv, "c:ftv")) != EOF) {
 
                switch (ch) {
                        case 'c':
                                res = snprintf(corosync_config_file, sizeof(corosync_config_file), "%s", optarg);
                                if (res >= sizeof(corosync_config_file)) {
                                        fprintf (stderr, "Config file path too long.\n");
                                        syslog (LOGSYS_LEVEL_ERROR, "Config file path too long.");
 
                                        logsys_system_fini();
                                        return EXIT_FAILURE;
                                }
                                break;
                        case 'f':
                                background = 0;
                                break;
                        case 't':
                                testonly = 1;
                                break;
                        case 'v':
                                show_version_info();
                                logsys_system_fini();
                                return EXIT_SUCCESS;
 
                                break;
                        default:
                                fprintf(stderr, \
                                        "usage:\n"\
                                        "        -c     : Corosync config file path.\n"\
                                        "        -f     : Start application in foreground.\n"\
                                        "        -t     : Test configuration and exit.\n"\
                                        "        -v     : Display version, git revision and some useful information about Corosync and exit.\n");
                                logsys_system_fini();
                                return EXIT_FAILURE;
                }
        }
 
 
        /*
         * Other signals are registered later via qb_loop_signal_add
         */
        (void)signal (SIGSEGV, sigsegv_handler);
        (void)signal (SIGABRT, sigsegv_handler);
#if MSG_NOSIGNAL != 0
        (void)signal (SIGPIPE, SIG_IGN);
#endif
 
        if (icmap_init() != CS_OK) {
                fprintf (stderr, "Corosync Executive couldn't initialize configuration component.\n");
                syslog (LOGSYS_LEVEL_ERROR, "Corosync Executive couldn't initialize configuration component.");
                corosync_exit_error (COROSYNC_DONE_ICMAP);
        }
        set_icmap_ro_keys_flag();
 
        /*
         * Initialize the corosync_api_v1 definition
         */
        api = apidef_get ();
 
        res = coroparse_configparse(icmap_get_global_map(), &error_string);
        if (res == -1) {
                /*
                 * Logsys can't log properly at this early stage, and we need to get this message out
                 *
                 */
                fprintf (stderr, "%s\n", error_string);
                syslog (LOGSYS_LEVEL_ERROR, "%s", error_string);
                corosync_exit_error (COROSYNC_DONE_MAINCONFIGREAD);
        }
 
        if (stats_map_init(api) != CS_OK) {
                fprintf (stderr, "Corosync Executive couldn't initialize statistics component.\n");
                syslog (LOGSYS_LEVEL_ERROR, "Corosync Executive couldn't initialize statistics component.");
                corosync_exit_error (COROSYNC_DONE_STATS);
        }
 
        res = corosync_log_config_read (&error_string);
        if (res == -1) {
                /*
                 * if we are here, we _must_ flush the logsys queue
                 * and try to inform that we couldn't read the config.
                 * this is a desperate attempt before certain death
                 * and there is no guarantee that we can print to stderr
                 * nor that logsys is sending the messages where we expect.
                 */
                log_printf (LOGSYS_LEVEL_ERROR, "%s", error_string);
                fprintf(stderr, "%s", error_string);
                syslog (LOGSYS_LEVEL_ERROR, "%s", error_string);
                corosync_exit_error (COROSYNC_DONE_LOGCONFIGREAD);
        }
 
        if (!testonly) {
                log_printf (LOGSYS_LEVEL_NOTICE, "Corosync Cluster Engine %s starting up", VERSION);
                log_printf (LOGSYS_LEVEL_INFO, "Corosync built-in features:" PACKAGE_FEATURES "");
        }
 
        /*
         * Create totem logsys subsys before totem_config_read so log functions can be used
         */
        log_subsys_id_totem = _logsys_subsys_create("TOTEM", "totem,"
                        "totemip.c,totemconfig.c,totemcrypto.c,totemsrp.c,"
                        "totempg.c,totemudp.c,totemudpu.c,totemnet.c,totemknet.c");
 
        res = chdir(get_state_dir());
        if (res == -1) {
                log_printf (LOGSYS_LEVEL_ERROR, "Cannot chdir to state directory %s. %s", get_state_dir(), strerror(errno));
                corosync_exit_error (COROSYNC_DONE_DIR_NOT_PRESENT);
        }
 
        res = totem_config_read (&totem_config, &error_string, &totem_config_warnings);
        if (res == -1) {
                log_printf (LOGSYS_LEVEL_ERROR, "%s", error_string);
                corosync_exit_error (COROSYNC_DONE_MAINCONFIGREAD);
        }
 
        if (totem_config_warnings & TOTEM_CONFIG_WARNING_MEMBERS_IGNORED) {
                log_printf (LOGSYS_LEVEL_WARNING, "member section is used together with nodelist. Members ignored.");
        }
 
        if (totem_config_warnings & TOTEM_CONFIG_WARNING_MEMBERS_DEPRECATED) {
                log_printf (LOGSYS_LEVEL_WARNING, "member section is deprecated.");
        }
 
        if (totem_config_warnings & TOTEM_CONFIG_WARNING_TOTEM_NODEID_SET) {
                log_printf (LOGSYS_LEVEL_WARNING, "nodeid in totem section is deprecated and ignored. "
                    "Nodelist (or autogenerated) nodeid is going to be used.");
        }
 
        if (totem_config_warnings & TOTEM_CONFIG_BINDNETADDR_NODELIST_SET) {
                log_printf (LOGSYS_LEVEL_WARNING, "interface section bindnetaddr is used together with nodelist. "
                    "Nodelist one is going to be used.");
        }
 
        if (totem_config_warnings != 0) {
                log_printf (LOGSYS_LEVEL_WARNING, "Please migrate config file to nodelist.");
        }
 
        res = totem_config_validate (&totem_config, &error_string);
        if (res == -1) {
                log_printf (LOGSYS_LEVEL_ERROR, "%s", error_string);
                corosync_exit_error (COROSYNC_DONE_MAINCONFIGREAD);
        }
 
        if (testonly) {
                corosync_exit_error (COROSYNC_DONE_EXIT);
        }
 
 
        move_to_root_cgroup = MOVE_TO_ROOT_CGROUP_MODE_AUTO;
        if (icmap_get_string("system.move_to_root_cgroup", &tmp_str) == CS_OK) {
                /*
                 * Validity of move_to_root_cgroup values checked in coroparse.c
                 */
                if (strcmp(tmp_str, "yes") == 0) {
                        move_to_root_cgroup = MOVE_TO_ROOT_CGROUP_MODE_ON;
                } else if (strcmp(tmp_str, "no") == 0) {
                        move_to_root_cgroup = MOVE_TO_ROOT_CGROUP_MODE_OFF;
                }
                free(tmp_str);
        }
 
 
        sched_rr = 1;
        if (icmap_get_string("system.sched_rr", &tmp_str) == CS_OK) {
                if (strcmp(tmp_str, "yes") != 0) {
                        sched_rr = 0;
                }
                free(tmp_str);
        }
 
        prio = 0;
        if (icmap_get_string("system.priority", &tmp_str) == CS_OK) {
                if (strcmp(tmp_str, "max") == 0) {
                        prio = INT_MIN;
                } else if (strcmp(tmp_str, "min") == 0) {
                        prio = INT_MAX;
                } else {
                        errno = 0;
 
                        tmpli = strtol(tmp_str, &ep, 10);
                        if (errno != 0 || *ep != '\0' || tmpli > INT_MAX || tmpli < INT_MIN) {
                                log_printf (LOGSYS_LEVEL_ERROR, "Priority value %s is invalid", tmp_str);
                                corosync_exit_error (COROSYNC_DONE_MAINCONFIGREAD);
                        }
 
                        prio = tmpli;
                }
 
                free(tmp_str);
        }
 
        if (move_to_root_cgroup == MOVE_TO_ROOT_CGROUP_MODE_ON) {
                /*
                 * Try to move corosync into root cpu cgroup. Failure is not fatal and
                 * error is deliberately ignored.
                 */
                (void)corosync_move_to_root_cgroup();
        }
 
        /*
         * Set round robin realtime scheduling with priority 99
         */
        if (sched_rr) {
                silent = (move_to_root_cgroup == MOVE_TO_ROOT_CGROUP_MODE_AUTO);
                res = corosync_set_rr_scheduler (silent);
 
                if (res == -1 && move_to_root_cgroup == MOVE_TO_ROOT_CGROUP_MODE_AUTO) {
                        /*
                         * Try to move process to root cgroup and try set priority again
                         */
                        (void)corosync_move_to_root_cgroup();
 
                        res = corosync_set_rr_scheduler (0);
                }
 
                if (res != 0) {
                        prio = INT_MIN;
                } else {
                        prio = 0;
                }
        }
 
        if (prio != 0) {
                if (setpriority(PRIO_PGRP, 0, prio) != 0) {
                        LOGSYS_PERROR(errno, LOGSYS_LEVEL_WARNING,
                                "Could not set priority %d", prio);
                }
        }
 
        totem_config.totem_memb_ring_id_create_or_load = corosync_ring_id_create_or_load;
        totem_config.totem_memb_ring_id_store = corosync_ring_id_store;
 
        totem_config.totem_logging_configuration = totem_logging_configuration;
        totem_config.totem_logging_configuration.log_subsys_id = log_subsys_id_totem;
 
        totem_config.totem_logging_configuration.log_level_security = LOGSYS_LEVEL_WARNING;
        totem_config.totem_logging_configuration.log_level_error = LOGSYS_LEVEL_ERROR;
        totem_config.totem_logging_configuration.log_level_warning = LOGSYS_LEVEL_WARNING;
        totem_config.totem_logging_configuration.log_level_notice = LOGSYS_LEVEL_NOTICE;
        totem_config.totem_logging_configuration.log_level_debug = LOGSYS_LEVEL_DEBUG;
        totem_config.totem_logging_configuration.log_level_trace = LOGSYS_LEVEL_TRACE;
        totem_config.totem_logging_configuration.log_printf = _logsys_log_printf;
 
        logsys_config_apply();
 
        /*
         * Now we are fully initialized.
         */
        if (background) {
                logsys_blackbox_prefork();
 
                corosync_tty_detach ();
 
                logsys_blackbox_postfork();
 
                log_printf (LOGSYS_LEVEL_DEBUG, "Corosync TTY detached");
        }
 
        /*
         * Lock all memory to avoid page faults which may interrupt
         * application healthchecking
         */
        corosync_mlockall ();
 
        corosync_poll_handle = qb_loop_create ();
 
        memset(&scheduler_pause_timeout_data, 0, sizeof(scheduler_pause_timeout_data));
        scheduler_pause_timeout_data.totem_config = &totem_config;
        timer_function_scheduler_timeout (&scheduler_pause_timeout_data);
 
        qb_loop_signal_add(corosync_poll_handle, QB_LOOP_LOW,
                SIGUSR2, NULL, sig_diag_handler, NULL);
        qb_loop_signal_add(corosync_poll_handle, QB_LOOP_HIGH,
                SIGINT, NULL, sig_exit_handler, NULL);
        qb_loop_signal_add(corosync_poll_handle, QB_LOOP_HIGH,
                SIGQUIT, NULL, sig_exit_handler, NULL);
        qb_loop_signal_add(corosync_poll_handle, QB_LOOP_HIGH,
                SIGTERM, NULL, sig_exit_handler, NULL);
 
        if (logsys_thread_start() != 0) {
                log_printf (LOGSYS_LEVEL_ERROR, "Can't initialize log thread");
                corosync_exit_error (COROSYNC_DONE_LOGCONFIGREAD);
        }
 
        if ((flock_err = corosync_flock (corosync_lock_file, getpid ())) != COROSYNC_DONE_EXIT) {
                corosync_exit_error (flock_err);
        }
 
        /*
         * if totempg_initialize doesn't have root priveleges, it cannot
         * bind to a specific interface.  This only matters if
         * there is more then one interface in a system, so
         * in this case, only a warning is printed
         */
        /*
         * Join multicast group and setup delivery
         *  and configuration change functions
         */
        if (totempg_initialize (
                corosync_poll_handle,
                &totem_config) != 0) {
 
                log_printf (LOGSYS_LEVEL_ERROR, "Can't initialize TOTEM layer");
                corosync_exit_error (COROSYNC_DONE_FATAL_ERR);
        }
 
        totempg_service_ready_register (
                main_service_ready);
 
        totempg_groups_initialize (
                &corosync_group_handle,
                deliver_fn,
                confchg_fn);
 
        totempg_groups_join (
                corosync_group_handle,
                &corosync_group,
                1);
 
        /*
         * Drop root privleges to user 'corosync'
         * TODO: Don't really need full root capabilities;
         *       needed capabilities are:
         * CAP_NET_RAW (bindtodevice)
         * CAP_SYS_NICE (setscheduler)
         * CAP_IPC_LOCK (mlockall)
         */
        priv_drop ();
 
        schedwrk_init (
                serialize_lock,
                serialize_unlock);
 
        /*
         * Start main processing loop
         */
        qb_loop_run (corosync_poll_handle);
 
        /*
         * Exit was requested
         */
        totempg_finalize ();
 
        /*
         * free the loop resources
         */
        qb_loop_destroy (corosync_poll_handle);
 
        /*
         * free up the icmap 
         */
 
        /*
         * Remove pid lock file
         */
        close (lockfile_fd);
        unlink (corosync_lock_file);
 
        corosync_exit_error (COROSYNC_DONE_EXIT);
 
        return EXIT_SUCCESS;
}