/**************************************************************** * * * Copyright 2001, 2011 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 "gtm_ipc.h" #include "gtm_inet.h" #include "gtm_fcntl.h" #include "gtm_string.h" #include "gtm_unistd.h" #include "gtm_time.h" #include #include #include #include #include /* for VSIG_ATOMIC_T type */ #include "gdsroot.h" #include "gtm_facility.h" #include "fileinfo.h" #include "gdsbt.h" #include "gdsfhead.h" #include "filestruct.h" #include "gdsblk.h" #include "gt_timer.h" #include "jnl.h" #include "interlock.h" #include "error.h" #include "iosp.h" #include "gdsbgtr.h" #include "repl_msg.h" #include "gtmsource.h" #include "aswp.h" #include "gtm_c_stack_trace.h" #include "eintr_wrappers.h" #include "eintr_wrapper_semop.h" #include "util.h" #include "send_msg.h" #include "change_reg.h" #include "compswap.h" #ifdef UNIX #include "mutex.h" #endif #include "gds_rundown.h" #include "gvusr.h" #include "do_semop.h" #include "mmseg.h" #include "ipcrmid.h" #include "gtmmsg.h" #include "wcs_recover.h" #include "wcs_mm_recover.h" #include "tp_change_reg.h" #include "wcs_flu.h" #include "add_inter.h" #include "io.h" #include "gtmsecshr.h" #include "ftok_sems.h" #include "gtmimagename.h" #include "gtmio.h" #include "have_crit.h" #include "wcs_clean_dbsync.h" #include "is_proc_alive.h" #include "shmpool.h" #include "db_snapshot.h" #include "tp_grab_crit.h" #include "ss_lock_facility.h" #ifndef GTM_SNAPSHOT # error "Snapshot facility not available on this platform" #endif #define CANCEL_DB_TIMERS(region, csa, cancelled_timer, cancelled_dbsync_timer) \ { \ if (csa->timer) \ { \ cancel_timer((TID)region); \ if (NULL != csa->nl) \ DECR_CNT(&csa->nl->wcs_timers, &csa->nl->wc_var_lock); \ cancelled_timer = TRUE; \ csa->timer = FALSE; \ } \ if (csa->dbsync_timer) \ { \ CANCEL_DBSYNC_TIMER(csa, FALSE); \ cancelled_dbsync_timer = TRUE; \ } \ } GBLREF VSIG_ATOMIC_T forced_exit; GBLREF boolean_t mupip_jnl_recover; GBLREF boolean_t have_standalone_access; GBLREF boolean_t created_core, need_core, dont_want_core, is_src_server, is_updproc; GBLREF gd_region *gv_cur_region; GBLREF sgmnt_addrs *cs_addrs; GBLREF sgmnt_data_ptr_t cs_data; GBLREF uint4 process_id; GBLREF ipcs_mesg db_ipcs; GBLREF jnl_process_vector *prc_vec; GBLREF jnl_process_vector *originator_prc_vec; GBLREF jnl_gbls_t jgbl; GBLREF boolean_t dse_running; error_def(ERR_ASSERT); error_def(ERR_CRITSEMFAIL); error_def(ERR_DBFILERR); error_def(ERR_DBRNDWN); error_def(ERR_DBRNDWNWRN); error_def(ERR_GTMASSERT); error_def(ERR_GTMCHECK); error_def(ERR_IPCNOTDEL); error_def(ERR_JNLFLUSH); error_def(ERR_MEMORY); error_def(ERR_OUTOFSPACE); error_def(ERR_RNDWNSEMFAIL); error_def(ERR_TEXT); error_def(ERR_WCBLOCKED); error_def(ERR_STACKOFLOW); LITREF char gtm_release_name[]; LITREF int4 gtm_release_name_len; static boolean_t grabbed_access_sem; void gds_rundown(void) { bool is_mm, we_are_last_user, we_are_last_writer; boolean_t ipc_deleted, remove_shm, cancelled_timer, cancelled_dbsync_timer, vermismatch; now_t now; /* for GET_CUR_TIME macro */ char *time_ptr, time_str[CTIME_BEFORE_NL + 2]; /* for GET_CUR_TIME macro */ gd_region *reg; int save_errno, status, rc; int4 semval, ftok_semval, sopcnt, ftok_sopcnt; short crash_count; sm_long_t munmap_len; sgmnt_addrs *csa; sgmnt_data_ptr_t csd; struct shmid_ds shm_buf; struct sembuf sop[2], ftok_sop[2]; uint4 jnl_status; unix_db_info *udi; jnl_private_control *jpc; jnl_buffer_ptr_t jbp; shm_snapshot_t *ss_shm_ptr; boolean_t is_cur_process_ss_initiator; uint4 ss_pid; grabbed_access_sem = FALSE; jnl_status = 0; reg = gv_cur_region; /* Local copy */ /* * early out for cluster regions * to avoid tripping the assert below. * Note: * This early out is consistent with VMS. It has been * noted that all of the gtcm assignments * to gv_cur_region should use the TP_CHANGE_REG * macro. This would also avoid the assert problem * and should be done eventually. */ if (dba_cm == reg->dyn.addr->acc_meth) return; udi = FILE_INFO(reg); csa = &udi->s_addrs; csd = csa->hdr; assert(csa == cs_addrs && csd == cs_data); if ((reg->open) && (dba_usr == csd->acc_meth)) { change_reg(); gvusr_rundown(); return; } ESTABLISH(gds_rundown_ch); assert(!csa->hold_onto_crit); /* because of this, we dont need to do "was_crit" checks before doing "rel_crit" below */ if (!reg->open) /* Not open, no point to rundown */ { if (reg->opening) /* Died partway open, kill rest of way */ { rel_crit(reg); mutex_cleanup(reg); /* revist this to handle MM properly SMW 98/12/16 if (NULL != csa->nl) { status = shmdt((caddr_t)csa->nl); if (-1 == status) send_msg(VARLSTCNT(9) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, LEN_AND_LIT("Error during shmdt"), errno); } */ shmdt((caddr_t)csa->nl); csa->nl = NULL; REMOVE_CSA_FROM_CSADDRSLIST(csa); /* remove "csa" from list of open regions (cs_addrs_list) */ } REVERT; return; } switch(csd->acc_meth) { /* Pass mm and bg through */ case dba_bg: is_mm = FALSE; break; case dba_mm: is_mm = TRUE; break; case dba_usr: assert(FALSE); default: REVERT; return; } /* Cancel any pending flush timer for this region by this task */ cancelled_timer = FALSE; cancelled_dbsync_timer = FALSE; CANCEL_DB_TIMERS(reg, csa, cancelled_timer, cancelled_dbsync_timer); we_are_last_user = FALSE; if (!csa->persistent_freeze) region_freeze(reg, FALSE, FALSE, FALSE); rel_crit(reg); /* get locks to known state */ mutex_cleanup(reg); /* * We need to guarantee that none else access database file header when semid/shmid fields are reset. * We already have created ftok semaphore in db_init or, mu_rndwn_file and did not remove it. * So just lock it. We do it in blocking mode. */ DEFER_INTERRUPTS(INTRPT_IN_GDS_RUNDOWN); if (!ftok_sem_lock(reg, FALSE, FALSE)) rts_error(VARLSTCNT(4) ERR_DBFILERR, 2, DB_LEN_STR(reg)); FTOK_TRACE(csa, csa->ti->curr_tn, ftok_ops_lock, process_id); /* * If we already have database access control semaphore, we do not release it now. We will release it * in mupip_exit_handler.c */ if (!have_standalone_access) { sop[0].sem_num = 0; sop[0].sem_op = 0; /* Wait for 0 */ sop[1].sem_num = 0; sop[1].sem_op = 1; /* Lock */ sopcnt = 2; sop[0].sem_flg = sop[1].sem_flg = SEM_UNDO | IPC_NOWAIT; /* Don't wait the first time thru */ SEMOP(udi->semid, sop, sopcnt, status, NO_WAIT); if (-1 == status) /* We couldn't get it in one shot -- see if we already have it */ { save_errno = errno; if (semctl(udi->semid, 0, GETPID) == process_id) { send_msg(VARLSTCNT(5) MAKE_MSG_INFO(ERR_CRITSEMFAIL), 2, DB_LEN_STR(reg), ERR_RNDWNSEMFAIL); REVERT; ENABLE_INTERRUPTS(INTRPT_IN_GDS_RUNDOWN); return; /* Already in rundown for this region */ } if (EAGAIN != save_errno) { assert(FALSE); rts_error(VARLSTCNT(9) ERR_CRITSEMFAIL, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("gds_rundown first semop/semctl"), save_errno); } sop[0].sem_flg = sop[1].sem_flg = SEM_UNDO; /* Try again - blocking this time */ SEMOP(udi->semid, sop, 2, status, FORCED_WAIT); if (-1 == status) /* We couldn't get it at all.. */ rts_error(VARLSTCNT(5) ERR_CRITSEMFAIL, 2, DB_LEN_STR(reg), errno); } } grabbed_access_sem = TRUE; /* * We now have the dbinit/rundown lock, so we are alone in this code for this region * and nobody else can attach. * See if we are all alone in accessing this database shared memory. */ assert(csa->ref_cnt); /* decrement private ref_cnt before shared ref_cnt decrement. */ csa->ref_cnt--; /* Currently journaling logic in gds_rundown() in VMS relies on this order to detect last writer */ assert(!csa->ref_cnt); --csa->nl->ref_cnt; if (memcmp(csa->nl->now_running, gtm_release_name, gtm_release_name_len + 1)) { /* VERMISMATCH condition. Possible only if DSE */ assert(dse_running); vermismatch = TRUE; } else vermismatch = FALSE; if (-1 == shmctl(udi->shmid, IPC_STAT, &shm_buf)) { save_errno = errno; rts_error(VARLSTCNT(9) ERR_CRITSEMFAIL, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("gds_rundown shmctl"), save_errno); } else we_are_last_user = (1 == shm_buf.shm_nattch) && !vermismatch; assert(!have_standalone_access || we_are_last_user); /* recover => one user */ if (-1 == (semval = semctl(udi->semid, 1, GETVAL))) rts_error(VARLSTCNT(5) ERR_CRITSEMFAIL, 2, DB_LEN_STR(reg), errno); we_are_last_writer = (1 == semval) && (FALSE == reg->read_only) && !vermismatch;/* There's one writer left and I am it */ assert(!(have_standalone_access && !reg->read_only) || we_are_last_writer); /* recover + R/W region => one writer */ if (-1 == (ftok_semval = semctl(udi->ftok_semid, 1, GETVAL))) rts_error(VARLSTCNT(5) ERR_CRITSEMFAIL, 2, DB_LEN_STR(reg), errno); if (NULL != csa->ss_ctx) ss_destroy_context(csa->ss_ctx); /* SS_MULTI: If multiple snapshots are supported, then we have to run through each of the snapshots */ assert(1 == MAX_SNAPSHOTS); ss_shm_ptr = (shm_snapshot_ptr_t)SS_GETSTARTPTR(csa); ss_pid = ss_shm_ptr->ss_info.ss_pid; is_cur_process_ss_initiator = (process_id == ss_pid); if (ss_pid && (is_cur_process_ss_initiator || we_are_last_user)) { /* Try getting snapshot crit latch. If we don't get latch, we won't hang for eternity and will skip * doing the orphaned snapshot cleanup. It will be cleaned up eventually either by subsequent MUPIP * INTEG or by a MUPIP RUNDOWN. */ if (ss_get_lock_nowait(reg) && (ss_pid == ss_shm_ptr->ss_info.ss_pid) && (is_cur_process_ss_initiator || !is_proc_alive(ss_pid, 0))) { ss_release(NULL); ss_release_lock(reg); } } /* If csa->nl->donotflush_dbjnl is set, it means mupip recover/rollback was interrupted and therefore we should * not flush shared memory contents to disk as they might be in an inconsistent state. * In this case, we will go ahead and remove shared memory (without flushing the contents) in this routine. * A reissue of the recover/rollback command will restore the database to a consistent state. * Otherwise, if we have write access to this region, let us perform a few writing tasks. */ if (csa->nl->donotflush_dbjnl) csa->wbuf_dqd = 0; /* ignore csa->wbuf_dqd status as we do not care about the cache contents */ else if (!reg->read_only && !vermismatch) { /* If we had an orphaned block and were interrupted, set wc_blocked so we can invoke wcs_recover */ if (csa->wbuf_dqd) { grab_crit(reg); SET_TRACEABLE_VAR(csd->wc_blocked, TRUE); BG_TRACE_PRO_ANY(csa, wcb_gds_rundown); send_msg(VARLSTCNT(8) ERR_WCBLOCKED, 6, LEN_AND_LIT("wcb_gds_rundown"), process_id, &csa->ti->curr_tn, DB_LEN_STR(reg)); csa->wbuf_dqd = 0; wcs_recover(reg); if (is_mm) { assert(FALSE); csd = csa->hdr; } BG_TRACE_PRO_ANY(csa, lost_block_recovery); rel_crit(reg); } if (JNL_ENABLED(csd) && IS_GTCM_GNP_SERVER_IMAGE) originator_prc_vec = NULL; /* If we are the last writing user, then everything must be flushed */ if (we_are_last_writer) { /* Time to flush out all of our buffers */ if (is_mm) { if (csa->total_blks != csa->ti->total_blks) /* do remap if file had been extended */ { grab_crit(reg); wcs_mm_recover(reg); csd = csa->hdr; rel_crit(reg); } csa->nl->remove_shm = TRUE; } /* Note WCSFLU_SYNC_EPOCH ensures the epoch is synced to the journal and indirectly * also ensures that the db is fsynced. We don't want to use it in the calls to * wcs_flu() from t_end() and tp_tend() since we can defer it to out-of-crit there. * In this case, since we are running down, we don't have any such option. */ csa->nl->remove_shm = wcs_flu(WCSFLU_FLUSH_HDR | WCSFLU_WRITE_EPOCH | WCSFLU_SYNC_EPOCH); /* Since we_are_last_writer, we should be guaranteed that wcs_flu() did not change csd, (in * case of MM for potential file extension), even if it did a grab_crit(). Therefore, make * sure that's true. */ assert(csd == csa->hdr); assert(0 == memcmp(csd->label, GDS_LABEL, GDS_LABEL_SZ - 1)); } else if ((cancelled_timer && (0 > csa->nl->wcs_timers)) || cancelled_dbsync_timer) { /* cancelled pending db or jnl flush timers - flush database and journal buffers to disk */ grab_crit(reg); /* we need to sync the epoch as the fact that there is no active pending flush timer implies * there will be noone else who will flush the dirty buffers and EPOCH to disk in a timely fashion */ wcs_flu(WCSFLU_FLUSH_HDR | WCSFLU_WRITE_EPOCH | WCSFLU_SYNC_EPOCH); rel_crit(reg); assert((dba_mm == cs_data->acc_meth) || (csd == cs_data)); csd = cs_data; /* In case this is MM and wcs_flu() remapped an extended database, reset csd */ } /* Do rundown journal processing after buffer flushes since they require jnl to be open */ if (JNL_ENABLED(csd)) { /* the following tp_change_reg() is not needed due to the assert csa == cs_addrs at the beginning * of gds_rundown(), but just to be safe. To be removed by 2002!! --- nars -- 2001/04/25. */ tp_change_reg(); /* call this because jnl_ensure_open checks cs_addrs rather than gv_cur_region */ jpc = csa->jnl; jbp = jpc->jnl_buff; if (jbp->fsync_in_prog_latch.u.parts.latch_pid == process_id) { assert(FALSE); COMPSWAP_UNLOCK(&jbp->fsync_in_prog_latch, process_id, 0, LOCK_AVAILABLE, 0); } if (jbp->io_in_prog_latch.u.parts.latch_pid == process_id) { assert(FALSE); COMPSWAP_UNLOCK(&jbp->io_in_prog_latch, process_id, 0, LOCK_AVAILABLE, 0); } if (((NOJNL != jpc->channel) && !JNL_FILE_SWITCHED(jpc)) || we_are_last_writer && (0 != csa->nl->jnl_file.u.inode)) { /* We need to close the journal file cleanly if we have the latest generation journal file open * or if we are the last writer and the journal file is open in shared memory (not necessarily * by ourselves e.g. the only process that opened the journal got shot abnormally) * Note: we should not infer anything from the shared memory value of csa->nl->jnl_file.u.inode * if we are not the last writer as it can be concurrently updated. */ grab_crit(reg); if (JNL_ENABLED(csd)) { SET_GBL_JREC_TIME; /* jnl_ensure_open/jnl_put_jrt_pini/pfin/jnl_file_close all need it */ /* Before writing to jnlfile, adjust jgbl.gbl_jrec_time if needed to maintain time order * of jnl records. This needs to be done BEFORE the jnl_ensure_open as that could write * journal records (if it decides to switch to a new journal file). */ ADJUST_GBL_JREC_TIME(jgbl, jbp); jnl_status = jnl_ensure_open(); if (0 == jnl_status) { /* If we_are_last_writer, we would have already done a wcs_flu() which would * have written an epoch record and we are guaranteed no further updates * since we are the last writer. So, just close the journal. * Although we assert pini_addr should be non-zero for last_writer, we * play it safe in PRO and write a PINI record if not written already. */ assert(!jbp->before_images || is_mm || !we_are_last_writer || 0 != jpc->pini_addr); if (we_are_last_writer && 0 == jpc->pini_addr) jnl_put_jrt_pini(csa); if (0 != jpc->pini_addr) jnl_put_jrt_pfin(csa); /* If not the last writer and no pending flush timer left, do jnl flush now */ if (!we_are_last_writer && (0 > csa->nl->wcs_timers)) { if (SS_NORMAL == (jnl_status = jnl_flush(reg))) { assert(jbp->freeaddr == jbp->dskaddr); jnl_fsync(reg, jbp->dskaddr); assert(jbp->fsync_dskaddr == jbp->dskaddr); } else { send_msg(VARLSTCNT(9) ERR_JNLFLUSH, 2, JNL_LEN_STR(csd), ERR_TEXT, 2, RTS_ERROR_TEXT("Error with journal flush in gds_rundown"), jnl_status); assert(NOJNL == jpc->channel);/* jnl file lost has been triggered */ /* In this routine, all code that follows from here on does not * assume anything about the journaling characteristics of this * database so it is safe to continue execution even though * journaling got closed in the middle. */ } } jnl_file_close(reg, we_are_last_writer, FALSE); } else send_msg(VARLSTCNT(6) jnl_status, 4, JNL_LEN_STR(csd), DB_LEN_STR(reg)); } rel_crit(reg); } } if (we_are_last_writer) /* Flush the fileheader last and harden the file to disk */ { grab_crit(reg); /* To satisfy crit requirement in fileheader_sync() */ memset(csd->machine_name, 0, MAX_MCNAMELEN); /* clear the machine_name field */ if (!have_standalone_access && we_are_last_user) { /* mupip_exit_handler will do this after mur_close_file */ csd->semid = INVALID_SEMID; csd->shmid = INVALID_SHMID; csd->gt_sem_ctime.ctime = 0; csd->gt_shm_ctime.ctime = 0; } fileheader_sync(reg); rel_crit(reg); if (FALSE == is_mm) { if (-1 == fsync(udi->fd)) /* Sync it all */ { rts_error(VARLSTCNT(9) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("Error during file sync at close"), errno); } } else { /* Now do final MM file sync before exit */ #if !defined(TARGETED_MSYNC) && !defined(NO_MSYNC) if (-1 == fsync(udi->fd)) /* Sync it all */ { rts_error(VARLSTCNT(9) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("Error during file sync at close"), errno); } #else if (-1 == msync((caddr_t)csa->db_addrs[0], (size_t)(csa->db_addrs[1] - csa->db_addrs[0]), MS_SYNC)) { rts_error(VARLSTCNT(9) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("Error during file msync at close"), errno); } #endif } } } /* end if (!reg->read_only && !csa->nl->donotflush_dbjnl) */ /* We had cancelled all db timers at start of rundown. In case as part of rundown (wcs_flu above), we had started * any timers, cancel them BEFORE setting reg->open to FALSE (assert in wcs_clean_dbsync relies on this). */ CANCEL_DB_TIMERS(reg, csa, cancelled_timer, cancelled_dbsync_timer); if (reg->read_only && we_are_last_user && !have_standalone_access) { /* mupip_exit_handler will do this after mur_close_file */ db_ipcs.semid = INVALID_SEMID; db_ipcs.shmid = INVALID_SHMID; db_ipcs.gt_sem_ctime = 0; db_ipcs.gt_shm_ctime = 0; db_ipcs.fn_len = reg->dyn.addr->fname_len; memcpy(db_ipcs.fn, reg->dyn.addr->fname, reg->dyn.addr->fname_len); db_ipcs.fn[reg->dyn.addr->fname_len] = 0; /* request gtmsecshr to flush. read_only cannot flush itself */ if (0 != send_mesg2gtmsecshr(FLUSH_DB_IPCS_INFO, 0, (char *)NULL, 0)) rts_error(VARLSTCNT(8) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("gtmsecshr failed to update database file header")); } /* Done with file now, close it */ CLOSEFILE_RESET(udi->fd, rc); /* resets "udi->fd" to FD_INVALID */ if (-1 == rc) { rts_error(VARLSTCNT(9) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, LEN_AND_LIT("Error during file close"), errno); } /* Unmap storage if mm mode but only the part that is not the fileheader (so shows up in dumps) */ if (is_mm) { munmap_len = (sm_long_t)((csa->db_addrs[1] - csa->db_addrs[0]) - ROUND_UP(SIZEOF_FILE_HDR(csa->hdr), MSYNC_ADDR_INCS)); if (munmap_len > 0) { munmap((caddr_t)(csa->db_addrs[0] + ROUND_UP(SIZEOF_FILE_HDR(csa->hdr), MSYNC_ADDR_INCS)), (size_t)(munmap_len)); # ifdef DEBUG_DB64 rel_mmseg((caddr_t)csa->db_addrs[0]); # endif } } /* Detach our shared memory while still under lock so reference counts will be * correct for the next process to run down this region. * In the process also get the remove_shm status from node_local before detaching. * If csa->nl->donotflush_dbjnl is TRUE, it means we can safely remove shared memory without compromising data * integrity as a reissue of recover will restore the database to a consistent state. */ remove_shm = !vermismatch && (csa->nl->remove_shm || csa->nl->donotflush_dbjnl); status = shmdt((caddr_t)csa->nl); csa->nl = NULL; /* dereferencing nl after detach is not right, so we set it to NULL so that we can test before dereference*/ if (-1 == status) send_msg(VARLSTCNT(9) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, LEN_AND_LIT("Error during shmdt"), errno); REMOVE_CSA_FROM_CSADDRSLIST(csa); /* remove "csa" from list of open regions (cs_addrs_list) */ reg->open = FALSE; /* If file is still not in good shape, die here and now before we get rid of our storage */ if (csa->wbuf_dqd) GTMASSERT; ipc_deleted = FALSE; /* If we are the very last user, remove shared storage id and the semaphores */ if (we_are_last_user) { /* remove shared storage, only if last writer to rundown did a successful wcs_flu() */ assert(!vermismatch); if (remove_shm) { ipc_deleted = TRUE; if (0 != shm_rmid(udi->shmid)) rts_error(VARLSTCNT(8) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("Unable to remove shared memory")); } else if (is_src_server || is_updproc) { gtm_putmsg(VARLSTCNT(6) ERR_DBRNDWNWRN, 4, DB_LEN_STR(reg), process_id, process_id); send_msg(VARLSTCNT(6) ERR_DBRNDWNWRN, 4, DB_LEN_STR(reg), process_id, process_id); } else send_msg(VARLSTCNT(6) ERR_DBRNDWNWRN, 4, DB_LEN_STR(reg), process_id, process_id); /* * Don't release semaphore in case of mupip recover/rollback; since it has standalone access. * It will release the semaphore in mupip_exit_handler. */ if (!have_standalone_access) { if (0 != sem_rmid(udi->semid)) rts_error(VARLSTCNT(8) ERR_DBFILERR, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("Unable to remove semaphore")); grabbed_access_sem = FALSE; } } else { assert(!have_standalone_access); /* If we were writing, get rid of our writer access count semaphore */ if (!reg->read_only) if (0 != (save_errno = do_semop(udi->semid, 1, -1, SEM_UNDO))) rts_error(VARLSTCNT(9) ERR_CRITSEMFAIL, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("gds_rundown write semaphore release"), save_errno); /* Now remove the rundown lock */ if (0 != (save_errno = do_semop(udi->semid, 0, -1, SEM_UNDO))) rts_error(VARLSTCNT(9) ERR_CRITSEMFAIL, 2, DB_LEN_STR(reg), ERR_TEXT, 2, RTS_ERROR_TEXT("gds_rundown rundown semaphore release"), save_errno); grabbed_access_sem = FALSE; } if (!ftok_sem_release(reg, !have_standalone_access, FALSE)) rts_error(VARLSTCNT(4) ERR_DBFILERR, 2, DB_LEN_STR(reg)); FTOK_TRACE(csa, csa->ti->curr_tn, ftok_ops_release, process_id); ENABLE_INTERRUPTS(INTRPT_IN_GDS_RUNDOWN); if (!ipc_deleted) { GET_CUR_TIME; if (is_src_server) gtm_putmsg(VARLSTCNT(8) ERR_IPCNOTDEL, 6, CTIME_BEFORE_NL, time_ptr, LEN_AND_LIT("Source server"), REG_LEN_STR(reg)); if (is_updproc) gtm_putmsg(VARLSTCNT(8) ERR_IPCNOTDEL, 6, CTIME_BEFORE_NL, time_ptr, LEN_AND_LIT("Update process"), REG_LEN_STR(reg)); if (mupip_jnl_recover) { gtm_putmsg(VARLSTCNT(8) ERR_IPCNOTDEL, 6, CTIME_BEFORE_NL, time_ptr, LEN_AND_LIT("Mupip journal process"), REG_LEN_STR(reg)); send_msg(VARLSTCNT(8) ERR_IPCNOTDEL, 6, CTIME_BEFORE_NL, time_ptr, LEN_AND_LIT("Mupip journal process"), REG_LEN_STR(reg)); } } REVERT; } CONDITION_HANDLER(gds_rundown_ch) { pid_t sem_pid; int semop_res; unix_db_info *udi; sgmnt_addrs *csa; boolean_t cancelled_timer, cancelled_dbsync_timer; START_CH; /* To get as virgin a state as possible in the core, take the core now if we would be doing so anyway. This will set created_core so it doesn't happen again. */ if (DUMPABLE && !SUPPRESS_DUMP) { need_core = TRUE; gtm_fork_n_core(); } udi = FILE_INFO(gv_cur_region); csa = &udi->s_addrs; /* We got here on an error and are going to close the region. Cancel any pending flush timer for this region by this task*/ CANCEL_DB_TIMERS(gv_cur_region, csa, cancelled_timer, cancelled_dbsync_timer); /* release the access control semaphore, if you hold it */ if (grabbed_access_sem) { if (csa->now_crit) /* Might hold crit if wcs_flu or other failure */ { assert(!csa->hold_onto_crit); if (NULL != csa->nl) rel_crit(gv_cur_region); /* also sets csa->now_crit to FALSE */ else csa->now_crit = FALSE; } sem_pid = semctl(udi->semid, 0, GETPID); assert(sem_pid == process_id); if (0 != (semop_res = do_semop(udi->semid, 0, -1, SEM_UNDO | IPC_NOWAIT))) gtm_putmsg(VARLSTCNT(9) ERR_CRITSEMFAIL, 2, DB_LEN_STR(gv_cur_region), ERR_TEXT, 2, RTS_ERROR_TEXT("Error releasing access semaphore"), semop_res); } if (udi->grabbed_ftok_sem) ftok_sem_release(gv_cur_region, !have_standalone_access, TRUE); gv_cur_region->open = FALSE; csa->nl = NULL; REMOVE_CSA_FROM_CSADDRSLIST(csa); /* remove "csa" from list of open regions (cs_addrs_list) */ PRN_ERROR; gtm_putmsg(VARLSTCNT(4) ERR_DBRNDWN, 2, REG_LEN_STR(gv_cur_region)); UNWIND(NULL, NULL); }