int gtmrecv_changelog(void)
{
uint4 changelog_desired = 0, changelog_accepted = 0;
/* Grab the recvpool jnlpool option write lock */
if (0 > grab_sem(RECV, RECV_SERV_OPTIONS_SEM))
{
util_out_print("Error grabbing recvpool option write lock. Could not initiate change log", TRUE);
return (ABNORMAL_SHUTDOWN);
}
if (0 != recvpool.gtmrecv_local->changelog || 0 != recvpool.upd_proc_local->changelog)
{
util_out_print("Change log is already in progress. Not initiating change in log file or log interval", TRUE);
rel_sem(RECV, RECV_SERV_OPTIONS_SEM);
return (ABNORMAL_SHUTDOWN);
}
if ('\0' != gtmrecv_options.log_file[0]) /* trigger change in log file (for both receiver and update process) */
{
changelog_desired |= REPLIC_CHANGE_LOGFILE;
if (0 != strcmp(recvpool.gtmrecv_local->log_file, gtmrecv_options.log_file))
{
changelog_accepted |= REPLIC_CHANGE_LOGFILE;
strcpy(recvpool.gtmrecv_local->log_file, gtmrecv_options.log_file);
util_out_print("Change log initiated with file !AD", TRUE, LEN_AND_STR(gtmrecv_options.log_file));
} else
util_out_print("Log file is already !AD. Not initiating change in log file", TRUE,
LEN_AND_STR(gtmrecv_options.log_file));
}
if (0 != gtmrecv_options.rcvr_log_interval) /* trigger change in receiver log interval */
{
changelog_desired |= REPLIC_CHANGE_LOGINTERVAL;
if (gtmrecv_options.rcvr_log_interval != recvpool.gtmrecv_local->log_interval)
{
changelog_accepted |= REPLIC_CHANGE_LOGINTERVAL;
recvpool.gtmrecv_local->log_interval = gtmrecv_options.rcvr_log_interval;
util_out_print("Change initiated with receiver log interval !UL", TRUE, gtmrecv_options.rcvr_log_interval);
} else
util_out_print("Receiver log interval is already !UL. Not initiating change in log interval", TRUE,
gtmrecv_options.rcvr_log_interval);
}
if (0 != gtmrecv_options.upd_log_interval) /* trigger change in update process log interval */
{
changelog_desired |= REPLIC_CHANGE_UPD_LOGINTERVAL;
if (gtmrecv_options.upd_log_interval != recvpool.upd_proc_local->log_interval)
{
changelog_accepted |= REPLIC_CHANGE_UPD_LOGINTERVAL;
recvpool.upd_proc_local->log_interval = gtmrecv_options.upd_log_interval;
util_out_print("Change initiated with update process log interval !UL", TRUE,
gtmrecv_options.upd_log_interval);
} else
util_out_print("Update process log interval is already !UL. Not initiating change in log interval", TRUE,
gtmrecv_options.upd_log_interval);
}
if (0 != changelog_accepted)
recvpool.gtmrecv_local->changelog = changelog_accepted;
else
util_out_print("No change to log file or log interval", TRUE);
rel_sem(RECV, RECV_SERV_OPTIONS_SEM);
return ((0 != changelog_accepted && changelog_accepted == changelog_desired) ? NORMAL_SHUTDOWN : ABNORMAL_SHUTDOWN);
}
int gtmrecv_statslog(void)
{
#ifdef VMS
rts_error(VARLSTCNT(6) ERR_UNIMPLOP, 0, ERR_TEXT, 2, LEN_AND_LIT("Statistics logging not supported on VMS"));
#endif
/* Grab the recvpool option write lock */
if (0 > grab_sem(RECV, RECV_SERV_OPTIONS_SEM))
{
util_out_print("Error grabbing recvpool option write lock. Could not initiate stats log", TRUE);
return (ABNORMAL_SHUTDOWN);
}
if (gtmrecv_options.statslog == recvpool.gtmrecv_local->statslog)
{
util_out_print("STATSLOG is already !AD. Not initiating change in stats log", TRUE, gtmrecv_options.statslog ?
strlen("ON") : strlen("OFF"), gtmrecv_options.statslog ? "ON" : "OFF");
rel_sem_immediate(RECV, RECV_SERV_OPTIONS_SEM);
return (ABNORMAL_SHUTDOWN);
}
if (!gtmrecv_options.statslog)
{
recvpool.gtmrecv_local->statslog = FALSE;
util_out_print("STATSLOG turned OFF", TRUE);
rel_sem_immediate(RECV, RECV_SERV_OPTIONS_SEM);
return (NORMAL_SHUTDOWN);
}
recvpool.gtmrecv_local->statslog = TRUE;
util_out_print("Stats log turned on", TRUE);
rel_sem_immediate(RECV, RECV_SERV_OPTIONS_SEM);
return (NORMAL_SHUTDOWN);
}
int gtmsource_secnd_update(boolean_t print_message)
{
if (grab_sem(SOURCE, SRC_SERV_OPTIONS_SEM) < 0)
{
util_out_print("Error grabbing jnlpool option write lock. Could not initiate change log", TRUE);
return(ABNORMAL_SHUTDOWN);
}
grab_lock(jnlpool.jnlpool_dummy_reg, ASSERT_NO_ONLINE_ROLLBACK);
jnlpool.jnlpool_ctl->upd_disabled = update_disable;
rel_lock(jnlpool.jnlpool_dummy_reg);
rel_sem(SOURCE, SRC_SERV_OPTIONS_SEM);
if (print_message)
util_out_print("Updates are now !AZ", TRUE, update_disable ? "disabled" : "enabled");
return(NORMAL_SHUTDOWN);
}
int gtmrecv_endupd(void)
{
pid_t savepid;
int exit_status;
pid_t waitpid_res;
repl_log(stdout, TRUE, TRUE, "Initiating shut down of Update Process\n");
recvpool.upd_proc_local->upd_proc_shutdown = SHUTDOWN;
/* Wait for update process to shut down */
while((SHUTDOWN == recvpool.upd_proc_local->upd_proc_shutdown)
&& (0 < (savepid = (pid_t)recvpool.upd_proc_local->upd_proc_pid)) && is_proc_alive(savepid, 0))
{
SHORT_SLEEP(GTMRECV_WAIT_FOR_UPD_SHUTDOWN);
WAITPID(savepid, &exit_status, WNOHANG, waitpid_res); /* Release defunct update process if dead */
}
exit_status = recvpool.upd_proc_local->upd_proc_shutdown;
if (SHUTDOWN == exit_status)
{
if (0 == savepid) /* No Update Process */
exit_status = NORMAL_SHUTDOWN;
else /* Update Process Crashed */
{
repl_log(stderr, TRUE, TRUE, "Update Process exited abnormally, INTEGRITY CHECK might be warranted\n");
exit_status = ABNORMAL_SHUTDOWN;
}
}
/* Wait for the Update Process to detach */
if (0 == grab_sem(RECV, UPD_PROC_COUNT_SEM))
{
if(0 != (errno = rel_sem(RECV, UPD_PROC_COUNT_SEM)))
repl_log(stderr, TRUE, TRUE, "Error releasing the Update Process Count semaphore : %s\n", REPL_SEM_ERROR);
repl_log(stdout, TRUE, TRUE, "Update Process exited\n");
} else
{
repl_log(stderr, TRUE, TRUE, "Error in update proc count semaphore : %s\n", REPL_SEM_ERROR);
exit_status = ABNORMAL_SHUTDOWN;
}
return (exit_status);
}
int gtmsource_ipc_cleanup(boolean_t auto_shutdown, int *exit_status)
{
boolean_t i_am_the_last_user, attempt_ipc_cleanup;
int status, detach_status, remove_status, expected_nattach;
unix_db_info *udi;
struct shmid_ds shm_buf;
/* Attempt cleaning up the IPCs */
attempt_ipc_cleanup = TRUE;
/* Wait for the Source Server to detach and takeover the semaphore */
if (!auto_shutdown && 0 > grab_sem(SOURCE, SRC_SERV_COUNT_SEM))
{
repl_log(stderr, FALSE, TRUE, "Error taking control of source server count semaphore : %s. Shutdown not complete\n",
REPL_SEM_ERROR);
*exit_status = ABNORMAL_SHUTDOWN;
attempt_ipc_cleanup = FALSE;
}
udi = (unix_db_info *)FILE_INFO(jnlpool.jnlpool_dummy_reg);
if (!auto_shutdown || !gtmsource_srv_count)
expected_nattach = 1; /* Self, or parent */
else
expected_nattach = 0; /* Source server already detached */
i_am_the_last_user = (((status = shmctl(udi->shmid, IPC_STAT, &shm_buf)) == 0) && (shm_buf.shm_nattch == expected_nattach));
if (!i_am_the_last_user)
{
if (status < 0)
repl_log(stderr, FALSE, TRUE, "Error in jnlpool shmctl : %s\n", STRERROR(ERRNO));
else
repl_log(stderr, FALSE, TRUE, "Not deleting jnlpool ipcs. %d processes still attached to jnlpool\n",
shm_buf.shm_nattch - expected_nattach);
attempt_ipc_cleanup = FALSE;
*exit_status = ABNORMAL_SHUTDOWN;
}
if (attempt_ipc_cleanup)
{
if (INVALID_SHMID != udi->shmid && (auto_shutdown || (detach_status = SHMDT(jnlpool.jnlpool_ctl)) == 0)
&& (remove_status = shm_rmid(udi->shmid)) == 0)
{
jnlpool.jnlpool_ctl = jnlpool_ctl = NULL;
pool_init = FALSE;
repl_log(stdout, FALSE, FALSE, "Journal pool shared memory removed\n");
if (0 == (status = remove_sem_set(SOURCE)))
repl_log(stdout, FALSE, TRUE, "Journal pool semaphore removed\n");
else
{
repl_log(stderr, FALSE, TRUE, "Error removing jnlpool semaphore : %s\n", STRERROR(status));
*exit_status = ABNORMAL_SHUTDOWN;
}
} else if (INVALID_SHMID != udi->shmid)
{
if (!auto_shutdown && detach_status < 0)
repl_log(stderr, FALSE, FALSE,
"Error detaching from jnlpool shared memory : %s. Shared memory not removed\n",
STRERROR(ERRNO));
else if (remove_status != 0)
{
if (!auto_shutdown)
{
jnlpool.jnlpool_ctl = NULL; /* Detached successfully */
jnlpool_ctl = NULL;
pool_init = FALSE;
}
repl_log(stderr, FALSE, TRUE, "Error removing jnlpool shared memory : %s\n", STRERROR(ERRNO));
}
*exit_status = ABNORMAL_SHUTDOWN;
}
}
return attempt_ipc_cleanup;
}
int gtmrecv_ipc_cleanup(boolean_t auto_shutdown, int *exit_status)
{
boolean_t i_am_the_last_user, attempt_ipc_cleanup;
int status, detach_status, remove_status, expected_nattach;
struct shmid_ds shm_buf;
/* Attempt cleaning up the IPCs */
attempt_ipc_cleanup = TRUE;
/*
* Wait for the Receiver Server and Update Process to detach and
* takeover the semaphores. Note that the Receiver Server has already
* waited for the Update Process to detach. It is done here as a
* precaution against Receiver Server crashes.
*/
if (!auto_shutdown)
status = grab_sem(RECV, RECV_SERV_COUNT_SEM);
else
status = 0;
if (0 == status && 0 > (status = grab_sem(RECV, UPD_PROC_COUNT_SEM)))
rel_sem(RECV, RECV_SERV_COUNT_SEM);
if (status < 0)
{
repl_log(stderr, FALSE, TRUE,
"Error taking control of Receiver Server/Update Process count semaphore : %s. Shutdown not complete\n",
REPL_SEM_ERROR);
*exit_status = ABNORMAL_SHUTDOWN;
attempt_ipc_cleanup = FALSE;
}
/* Now we have locked out all users from the receive pool */
if (!auto_shutdown || !gtmrecv_srv_count)
expected_nattach = 1; /* Self, or parent */
else
expected_nattach = 0; /* Receiver server already detached */
i_am_the_last_user = (((status = shmctl(recvpool_shmid, IPC_STAT, &shm_buf)) == 0)
&& (shm_buf.shm_nattch == expected_nattach));
if (!i_am_the_last_user)
{
if (status < 0)
repl_log(stderr, FALSE, TRUE, "Error in jnlpool shmctl : %s\n", STRERROR(ERRNO));
else
repl_log(stderr, FALSE, TRUE,
"Not deleting receive pool ipcs. %d processes still attached to receive pool\n",
shm_buf.shm_nattch - expected_nattach);
attempt_ipc_cleanup = FALSE;
*exit_status = ABNORMAL_SHUTDOWN;
}
if (attempt_ipc_cleanup)
{
if (INVALID_SHMID != recvpool_shmid && (auto_shutdown || (detach_status = SHMDT(recvpool.recvpool_ctl)) == 0)
&& (remove_status = shm_rmid(recvpool_shmid)) == 0)
{
recvpool.recvpool_ctl = NULL;
repl_log(stdout, FALSE, FALSE, "Receive pool shared memory removed\n");
if (0 == (status = remove_sem_set(RECV)))
repl_log(stdout, FALSE, TRUE, "Receive pool semaphore removed\n");
else
{
repl_log(stderr, FALSE, TRUE, "Error removing receive pool semaphore : %s\n", STRERROR(status));
*exit_status = ABNORMAL_SHUTDOWN;
}
} else if (INVALID_SHMID != recvpool_shmid)
{
if (!auto_shutdown && detach_status < 0)
repl_log(stderr, FALSE, FALSE,
"Error detaching from receive pool shared memory : %s. Shared memory not removed\n",
STRERROR(ERRNO));
else if (remove_status != 0)
{
if (!auto_shutdown)
recvpool.recvpool_ctl = NULL; /* Detached successfully */
repl_log(stderr, FALSE, TRUE, "Error removing receive pool shared memory : %s\n", STRERROR(ERRNO));
}
*exit_status = ABNORMAL_SHUTDOWN;
}
}
return attempt_ipc_cleanup;
}
int gtmrecv_shutdown(boolean_t auto_shutdown, int exit_status)
{
uint4 savepid;
boolean_t shut_upd_too = FALSE;
int status;
unix_db_info *udi;
error_def(ERR_RECVPOOLSETUP);
error_def(ERR_TEXT);
repl_log(stdout, TRUE, TRUE, "Initiating shut down\n");
call_on_signal = NULL; /* So we don't reenter on error */
/* assert that auto shutdown should be invoked only if the current process is a receiver server */
assert(!auto_shutdown || gtmrecv_srv_count);
if (auto_shutdown)
{ /* grab the ftok semaphore and recvpool access control lock IN THAT ORDER (to avoid deadlocks) */
repl_inst_ftok_sem_lock();
status = grab_sem(RECV, RECV_POOL_ACCESS_SEM);
if (0 > status)
{
repl_log(stderr, TRUE, TRUE,
"Error grabbing receive pool control semaphore : %s. Shutdown not complete\n", REPL_SEM_ERROR);
return (ABNORMAL_SHUTDOWN);
}
} else
{ /* ftok semaphore and recvpool access semaphore should already be held from the previous call to "recvpool_init" */
DEBUG_ONLY(udi = (unix_db_info *)FILE_INFO(recvpool.recvpool_dummy_reg);)
assert(udi->grabbed_ftok_sem);
assert(holds_sem[RECV][RECV_POOL_ACCESS_SEM]);
/* We do not want to hold the options semaphore to avoid deadlocks with receiver server startup (C9F12-002766) */
assert(!holds_sem[RECV][RECV_SERV_OPTIONS_SEM]);
recvpool.gtmrecv_local->shutdown = SHUTDOWN;
/* Wait for receiver server to die. But release ftok semaphore and recvpool access control semaphore before
* waiting as the concurrently running receiver server might need these (e.g. if it is about to call the
* function "repl_inst_was_rootprimary").
*/
if (0 != rel_sem(RECV, RECV_POOL_ACCESS_SEM))
gtm_putmsg(VARLSTCNT(7) ERR_TEXT, 2, RTS_ERROR_LITERAL("Error in receiver server shutdown rel_sem"),
REPL_SEM_ERRNO);
repl_inst_ftok_sem_release();
/* Wait for receiver server to shut down */
while((SHUTDOWN == recvpool.gtmrecv_local->shutdown)
&& (0 < (savepid = recvpool.gtmrecv_local->recv_serv_pid))
&& is_proc_alive(savepid, 0))
SHORT_SLEEP(GTMRECV_WAIT_FOR_SHUTDOWN);
/* (Re)Grab the ftok semaphore and recvpool access control semaphore IN THAT ORDER (to avoid deadlocks) */
repl_inst_ftok_sem_lock();
status = grab_sem(RECV, RECV_POOL_ACCESS_SEM);
if (0 > status)
{
repl_log(stderr, TRUE, TRUE,
"Error regrabbing receive pool control semaphore : %s. Shutdown not complete\n", REPL_SEM_ERROR);
return (ABNORMAL_SHUTDOWN);
}
exit_status = recvpool.gtmrecv_local->shutdown;
if (SHUTDOWN == exit_status)
{
if (0 == savepid) /* No Receiver Process */
exit_status = NORMAL_SHUTDOWN;
else /* Receiver Server Crashed */
{
repl_log(stderr, FALSE, TRUE, "Receiver Server exited abnormally\n");
exit_status = ABNORMAL_SHUTDOWN;
shut_upd_too = TRUE;
}
}
}
