120 lines
4.5 KiB
C
120 lines
4.5 KiB
C
/****************************************************************
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* *
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* Copyright 2006, 2010 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "gtm_inet.h"
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#include "gtm_fcntl.h"
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#ifdef VMS
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#include <descrip.h> /* Required for gtmsource.h */
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#endif
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#include "gdsroot.h"
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#include "gtm_facility.h"
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#include "fileinfo.h"
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#include "gdsbt.h"
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#include "gdsfhead.h"
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#include "filestruct.h"
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#include "error.h"
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#include "repl_msg.h"
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#include "repl_shutdcode.h"
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#include "gtmsource.h"
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#include "jnl.h"
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#include "gtmmsg.h"
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#include "repl_instance.h"
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GBLREF gd_addr *gd_header;
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GBLREF jnlpool_addrs jnlpool;
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GBLREF jnlpool_ctl_ptr_t jnlpool_ctl;
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/* Find the start_jnl_seqno */
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void gtmsource_seqno_init(void)
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{
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gd_region *region_top, *reg;
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sgmnt_addrs *csa, *repl_csa;
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sgmnt_data_ptr_t csd;
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seq_num db_seqno, replinst_seqno, zqgblmod_seqno, max_dualsite_resync_seqno;
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sm_uc_ptr_t gld_fn;
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unix_db_info *udi;
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int i;
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error_def(ERR_NOREPLCTDREG);
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error_def(ERR_REPLINSTDBMATCH);
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/* Unix and VMS have different field names for now, but will both be soon changed to instfilename instead of gtmgbldir */
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UNIX_ONLY(gld_fn = (sm_uc_ptr_t)jnlpool_ctl->jnlpool_id.instfilename;)
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VMS_ONLY(gld_fn = (sm_uc_ptr_t)jnlpool_ctl->jnlpool_id.gtmgbldir;)
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db_seqno = 0;
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max_dualsite_resync_seqno = 0;
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zqgblmod_seqno = 0;
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region_top = gd_header->regions + gd_header->n_regions;
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for (reg = gd_header->regions; reg < region_top; reg++)
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{
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assert(reg->open);
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csa = &FILE_INFO(reg)->s_addrs;
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csd = csa->hdr;
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if (REPL_ALLOWED(csd))
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{
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if (db_seqno < csd->reg_seqno)
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db_seqno = csd->reg_seqno;
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if (max_dualsite_resync_seqno < csd->dualsite_resync_seqno)
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max_dualsite_resync_seqno = csd->dualsite_resync_seqno;
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if (zqgblmod_seqno < csd->zqgblmod_seqno)
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zqgblmod_seqno = csd->zqgblmod_seqno;
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}
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}
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if (0 == db_seqno)
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{ /* No replicated region, or databases created with older * version of GTM */
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gtm_putmsg(VARLSTCNT(3) ERR_NOREPLCTDREG, 1, gld_fn);
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/* Error, has to shutdown all regions 'cos mupip needs exclusive access to turn replication on */
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gtmsource_exit(ABNORMAL_SHUTDOWN);
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}
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replinst_seqno = jnlpool.repl_inst_filehdr->jnl_seqno;
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/* Assert that the jnl seqno of the instance is greater than or equal to the start_seqno of the last triple in the
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* instance file. If this was not the case, a REPLINSTSEQORD error would have been issued in "jnlpool_init"
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*/
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assert(!jnlpool_ctl->last_triple_seqno || (replinst_seqno >= jnlpool_ctl->last_triple_seqno));
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/* Check if jnl seqno in db and instance file match */
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if ((0 != replinst_seqno) && (db_seqno != replinst_seqno))
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{ /* Journal seqno from the databases does NOT match that stored in the replication instance file header. */
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udi = FILE_INFO(jnlpool.jnlpool_dummy_reg);
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gtm_putmsg(VARLSTCNT(6) ERR_REPLINSTDBMATCH, 4, LEN_AND_STR(udi->fn), &replinst_seqno, &db_seqno);
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gtmsource_exit(ABNORMAL_SHUTDOWN);
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}
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/* At this point, we are guaranteed there is no other process attached to the journal pool (since our parent source
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* server command is still waiting with the ftok lock for the pool to be initialized by this child). Even then it
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* does not hurt to get the lock on the journal pool before updating fields in there.
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*/
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DEBUG_ONLY(repl_csa = &FILE_INFO(jnlpool.jnlpool_dummy_reg)->s_addrs;)
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assert(!repl_csa->hold_onto_crit); /* so it is ok to invoke "grab_lock" and "rel_lock" unconditionally */
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grab_lock(jnlpool.jnlpool_dummy_reg);
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jnlpool_ctl->start_jnl_seqno = db_seqno;
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jnlpool_ctl->jnl_seqno = db_seqno;
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jnlpool_ctl->max_dualsite_resync_seqno = max_dualsite_resync_seqno;
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jnlpool_ctl->max_zqgblmod_seqno = zqgblmod_seqno;
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rel_lock(jnlpool.jnlpool_dummy_reg);
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DEBUG_ONLY(
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/* Assert that seqno fields in "gtmsrc_lcl" array are within the instance journal seqno.
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* This is taken care of in "mur_close_files".
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*/
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for (i = 0; i < NUM_GTMSRC_LCL; i++)
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{
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if ('\0' != jnlpool.gtmsrc_lcl_array[i].secondary_instname[0])
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{
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assert(jnlpool.gtmsrc_lcl_array[i].resync_seqno <= db_seqno);
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assert(jnlpool.gtmsrc_lcl_array[i].connect_jnl_seqno <= db_seqno);
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}
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}
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)
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jnlpool.jnlpool_ctl->pool_initialized = TRUE; /* It is only now that the journal pool is completely initialized */
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}
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