151 lines
4.6 KiB
C
151 lines
4.6 KiB
C
/****************************************************************
|
|
* *
|
|
* Copyright 2001, 2012 Fidelity Information Services, Inc *
|
|
* *
|
|
* 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 <signal.h> /* for VSIG_ATOMIC_T type */
|
|
|
|
#include "gdsroot.h"
|
|
#include "gtm_facility.h"
|
|
#include "fileinfo.h"
|
|
#include "gdsbt.h"
|
|
#include "gdsfhead.h"
|
|
#include "gdsbgtr.h"
|
|
#include "filestruct.h"
|
|
#include "send_msg.h"
|
|
#include "mutex.h"
|
|
#include "wcs_recover.h"
|
|
#include "deferred_signal_handler.h"
|
|
#include "caller_id.h"
|
|
#include "is_proc_alive.h"
|
|
#ifdef DEBUG
|
|
#include "gtm_stdio.h"
|
|
#include "gt_timer.h"
|
|
#include "wbox_test_init.h"
|
|
#include "repl_msg.h"
|
|
#include "gtmsource.h"
|
|
#include "jnl.h"
|
|
#endif
|
|
#include "gtmimagename.h"
|
|
#include "error.h"
|
|
#include "anticipatory_freeze.h"
|
|
|
|
GBLREF volatile int4 crit_count;
|
|
GBLREF short crash_count;
|
|
GBLREF uint4 process_id;
|
|
GBLREF node_local_ptr_t locknl;
|
|
#ifdef DEBUG
|
|
GBLREF jnlpool_addrs jnlpool;
|
|
GBLREF jnl_gbls_t jgbl;
|
|
#endif
|
|
GBLREF boolean_t mupip_jnl_recover;
|
|
|
|
error_def(ERR_CRITRESET);
|
|
error_def(ERR_DBCCERR);
|
|
error_def(ERR_DBFLCORRP);
|
|
|
|
void grab_crit(gd_region *reg)
|
|
{
|
|
unix_db_info *udi;
|
|
sgmnt_addrs *csa;
|
|
node_local_ptr_t cnl;
|
|
sgmnt_data_ptr_t csd;
|
|
enum cdb_sc status;
|
|
mutex_spin_parms_ptr_t mutex_spin_parms;
|
|
DEBUG_ONLY(sgmnt_addrs *jnlpool_csa;)
|
|
DCL_THREADGBL_ACCESS;
|
|
|
|
SETUP_THREADGBL_ACCESS;
|
|
udi = FILE_INFO(reg);
|
|
csa = &udi->s_addrs;
|
|
csd = csa->hdr;
|
|
cnl = csa->nl;
|
|
# ifdef DEBUG
|
|
if (gtm_white_box_test_case_enabled
|
|
&& (WBTEST_SENDTO_EPERM == gtm_white_box_test_case_number)
|
|
&& (0 == cnl->wbox_test_seq_num))
|
|
{
|
|
FPRINTF(stderr, "MUPIP BACKUP entered grab_crit\n");
|
|
cnl->wbox_test_seq_num = 1;
|
|
while (2 != cnl->wbox_test_seq_num)
|
|
LONG_SLEEP(1);
|
|
FPRINTF(stderr, "MUPIP BACKUP resumed in grab_crit\n");
|
|
cnl->wbox_test_seq_num = 3;
|
|
}
|
|
# endif
|
|
assert(!csa->hold_onto_crit);
|
|
if (!csa->now_crit)
|
|
{
|
|
# ifdef DEBUG
|
|
if (NULL != jnlpool.jnlpool_ctl)
|
|
{ /* We should never request crit on a database region while already holding the lock on the journal pool.
|
|
* Not following the protocol (obtaining lock on journal pool AFTER obtaining crit on database region),
|
|
* can lead to potential deadlocks
|
|
*/
|
|
jnlpool_csa = &FILE_INFO(jnlpool.jnlpool_dummy_reg)->s_addrs;
|
|
assert(!jnlpool_csa->now_crit);
|
|
}
|
|
# endif
|
|
assert(0 == crit_count);
|
|
crit_count++; /* prevent interrupts */
|
|
TREF(grabbing_crit) = reg;
|
|
DEBUG_ONLY(locknl = cnl;) /* for DEBUG_ONLY LOCK_HIST macro */
|
|
mutex_spin_parms = (mutex_spin_parms_ptr_t)&csd->mutex_spin_parms;
|
|
status = mutex_lockw(reg, mutex_spin_parms, crash_count);
|
|
# ifdef DEBUG
|
|
if (gtm_white_box_test_case_enabled
|
|
&& (WBTEST_SENDTO_EPERM == gtm_white_box_test_case_number)
|
|
&& (1 == cnl->wbox_test_seq_num))
|
|
{
|
|
FPRINTF(stderr, "MUPIP SET entered grab_crit\n");
|
|
cnl->wbox_test_seq_num = 2;
|
|
while (3 != cnl->wbox_test_seq_num)
|
|
LONG_SLEEP(1);
|
|
FPRINTF(stderr, "MUPIP SET resumed in grab_crit\n");
|
|
}
|
|
# endif
|
|
DEBUG_ONLY(locknl = NULL;) /* restore "locknl" to default value */
|
|
if (status != cdb_sc_normal)
|
|
{
|
|
crit_count = 0;
|
|
TREF(grabbing_crit) = NULL;
|
|
switch(status)
|
|
{
|
|
case cdb_sc_critreset:
|
|
rts_error(VARLSTCNT(4) ERR_CRITRESET, 2, REG_LEN_STR(reg));
|
|
case cdb_sc_dbccerr:
|
|
rts_error(VARLSTCNT(4) ERR_DBCCERR, 2, REG_LEN_STR(reg));
|
|
default:
|
|
GTMASSERT;
|
|
}
|
|
return;
|
|
}
|
|
/* There is only one case we know of when cnl->in_crit can be non-zero and that is when a process holding
|
|
* crit gets kill -9ed and another process ends up invoking "secshr_db_clnup" which in turn clears the
|
|
* crit semaphore (making it available for waiters) but does not also clear cnl->in_crit since it does not
|
|
* hold crit at that point. But in that case, the pid reported in cnl->in_crit should be dead. Check that.
|
|
*/
|
|
assert((0 == cnl->in_crit) || (FALSE == is_proc_alive(cnl->in_crit, 0)));
|
|
cnl->in_crit = process_id;
|
|
CRIT_TRACE(crit_ops_gw); /* see gdsbt.h for comment on placement */
|
|
TREF(grabbing_crit) = NULL;
|
|
crit_count = 0;
|
|
}
|
|
/* Commands/Utilties that plays with the file_corrupt flags (DSE/MUPIP SET -PARTIAL_RECOV_BYPASS/RECOVER/ROLLBACK) should
|
|
* NOT issue DBFLCORRP. Use skip_file_corrupt_check global variable for this purpose
|
|
*/
|
|
if (csd->file_corrupt && !TREF(skip_file_corrupt_check))
|
|
rts_error(VARLSTCNT(4) ERR_DBFLCORRP, 2, DB_LEN_STR(reg));
|
|
if (cnl->wc_blocked)
|
|
wcs_recover(reg);
|
|
return;
|
|
}
|