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/****************************************************************
* *
* Copyright (c) 2001-2018 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gtm_string.h"
#include "gdsroot.h"
#include "gdsbt.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsfhead.h"
#include "cli.h"
#include "lockconst.h"
#include "wcs_recover.h"
#include "dse.h"
#include "tp_change_reg.h" /* for tp_change_reg() prototype */
#ifdef UNIX
#include "mutex.h"
#endif
#include "util.h"
GBLREF sgmnt_addrs *cs_addrs;
GBLREF gd_region *gv_cur_region;
GBLREF uint4 process_id;
GBLREF short crash_count;
GBLREF gd_addr *original_header;
error_def(ERR_DBRDONLY);
#define MAX_UTIL_LEN 80
void dse_crit(void)
{
int util_len, dse_crit_count;
char util_buff[MAX_UTIL_LEN];
boolean_t crash = FALSE, cycle = FALSE, owner = FALSE;
gd_region *save_region, *r_local, *r_top;
crash = ((cli_present("CRASH") == CLI_PRESENT) || (cli_present("RESET") == CLI_PRESENT));
cycle = (CLI_PRESENT == cli_present("CYCLE"));
if (cli_present("SEIZE") == CLI_PRESENT || cycle)
{
if (gv_cur_region->read_only && !cycle)
rts_error_csa(CSA_ARG(cs_addrs) VARLSTCNT(4) ERR_DBRDONLY, 2, DB_LEN_STR(gv_cur_region));
if (cs_addrs->now_crit)
{
util_out_print("!/Write critical section already seized.!/", TRUE);
return;
}
UPDATE_CRASH_COUNT(cs_addrs, crash_count);
grab_crit_encr_cycle_sync(gv_cur_region);
cs_addrs->hold_onto_crit = TRUE; /* need to do this AFTER grab_crit */
cs_addrs->dse_crit_seize_done = TRUE;
util_out_print("!/Seized write critical section.!/", TRUE);
if (!cycle)
return;
}
if (cli_present("RELEASE") == CLI_PRESENT || cycle)
{
if (gv_cur_region->read_only && !cycle)
rts_error_csa(CSA_ARG(cs_addrs) VARLSTCNT(4) ERR_DBRDONLY, 2, DB_LEN_STR(gv_cur_region));
if (!cs_addrs->now_crit)
{
util_out_print("!/Critical section already released.!/", TRUE);
return;
}
UPDATE_CRASH_COUNT(cs_addrs, crash_count);
if (cs_addrs->now_crit)
{ /* user wants crit to be released unconditionally so "was_crit" not checked like everywhere else */
assert(cs_addrs->hold_onto_crit && cs_addrs->dse_crit_seize_done);
cs_addrs->dse_crit_seize_done = FALSE;
cs_addrs->hold_onto_crit = FALSE; /* need to do this before the rel_crit */
rel_crit(gv_cur_region);
util_out_print("!/Released write critical section.!/", TRUE);
}
# ifdef DEBUG
else
assert(!cs_addrs->hold_onto_crit && !cs_addrs->dse_crit_seize_done);
# endif
return;
}
if (cli_present("INIT") == CLI_PRESENT)
{
if (gv_cur_region->read_only)
rts_error_csa(CSA_ARG(cs_addrs) VARLSTCNT(4) ERR_DBRDONLY, 2, DB_LEN_STR(gv_cur_region));
cs_addrs->hdr->image_count = 0;
# ifdef CRIT_USE_PTHREAD_MUTEX
crash = TRUE;
# endif
gtm_mutex_init(gv_cur_region, NUM_CRIT_ENTRY(cs_addrs->hdr), crash);
cs_addrs->nl->in_crit = 0;
cs_addrs->now_crit = FALSE;
util_out_print("!/Reinitialized critical section.!/", TRUE);
return;
}
if (cli_present("REMOVE") == CLI_PRESENT)
{
if (gv_cur_region->read_only)
rts_error_csa(CSA_ARG(cs_addrs) VARLSTCNT(4) ERR_DBRDONLY, 2, DB_LEN_STR(gv_cur_region));
if (cs_addrs->nl->in_crit == 0)
{
util_out_print("!/The write critical section is unowned!/", TRUE);
return;
}
# ifndef CRIT_USE_PTHREAD_MUTEX
assert(LOCK_AVAILABLE != cs_addrs->critical->semaphore.u.parts.latch_pid);
# endif
cs_addrs->now_crit = TRUE;
cs_addrs->nl->in_crit = process_id;
UPDATE_CRASH_COUNT(cs_addrs, crash_count);
/* user wants crit to be removed unconditionally so "was_crit" not checked (before rel_crit) like everywhere else */
if (dba_bg == cs_addrs->hdr->acc_meth)
{
wcs_recover(gv_cur_region);
/* In case, this crit was obtained through a CRIT -SEIZE, csa->hold_onto_crit would have been set to
* TRUE. Set that back to FALSE now that we are going to release control of crit.
*/
cs_addrs->hold_onto_crit = FALSE; /* need to do this before the rel_crit */
cs_addrs->dse_crit_seize_done = FALSE;
rel_crit(gv_cur_region);
util_out_print("!/Removed owner of write critical section!/", TRUE);
} else
{
/* In case, this crit was obtained through a CRIT -SEIZE, csa->hold_onto_crit would have been set to
* TRUE. Set that back to FALSE now that we are going to release control of crit.
*/
cs_addrs->hold_onto_crit = FALSE; /* need to do this before the rel_crit */
cs_addrs->dse_crit_seize_done = FALSE;
rel_crit(gv_cur_region);
util_out_print("!/Removed owner of write critical section!/", TRUE);
util_out_print("!/WARNING: No recovery because database is MM.!/", TRUE);
}
return;
}
if (crash)
{
# ifndef CRIT_USE_PTHREAD_MUTEX
memcpy(util_buff, "!/Critical section crash count is ", 34);
util_len = 34;
util_len += i2hex_nofill(cs_addrs->critical->crashcnt, (uchar_ptr_t)&util_buff[util_len], 8);
memcpy(&util_buff[util_len], "!/", 2);
util_len += 2;
util_buff[util_len] = 0;
util_out_print(util_buff, TRUE);
# endif
return;
}
if (cli_present("ALL") == CLI_PRESENT)
{
dse_crit_count = 0;
save_region = gv_cur_region;
for (r_local = original_header->regions, r_top = r_local + original_header->n_regions; r_local < r_top; r_local++)
{
if (!r_local->open || r_local->was_open)
continue;
gv_cur_region = r_local;
tp_change_reg();
if (cs_addrs->nl->in_crit)
{
dse_crit_count++;
util_out_print("Database !AD : CRIT Owned by pid [!UL]", TRUE,
DB_LEN_STR(gv_cur_region), cs_addrs->nl->in_crit);
}
}
if (0 == dse_crit_count)
util_out_print("CRIT is currently unowned on all regions", TRUE);
gv_cur_region = save_region;
tp_change_reg();
return;
}
if (cs_addrs->nl->in_crit)
{
util_out_print("!/Write critical section owner is process id !UL", TRUE, cs_addrs->nl->in_crit);
if (cs_addrs->now_crit)
util_out_print("DSE (process id: !UL) owns the write critical section", TRUE, process_id);
util_out_print(0, TRUE);
} else
util_out_print("!/Write critical section is currently unowned", TRUE);
return;
}
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