142 lines
4.2 KiB
C
142 lines
4.2 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2011 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_unistd.h"
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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 "gdsbgtr.h"
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#include "filestruct.h"
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#include "iosp.h"
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#include "jnl.h"
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#include "aswp.h"
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#include "interlock.h"
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#include "sleep_cnt.h"
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#include "eintr_wrappers.h"
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#include "performcaslatchcheck.h"
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#include "send_msg.h"
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#include "wcs_sleep.h"
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#include "is_file_identical.h"
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#include "gtm_string.h"
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#include "gtm_c_stack_trace.h"
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#include "gtmsecshr.h" /* for continue_proc */
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#ifdef DEBUG
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#include "gt_timer.h"
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#include "gtm_stdio.h"
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#include "wbox_test_init.h"
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#endif
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GBLREF uint4 process_id;
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error_def(ERR_JNLFSYNCERR);
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error_def(ERR_FSYNCTIMOUT);
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error_def(ERR_TEXT);
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error_def(ERR_JNLFRCDTERM);
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error_def(ERR_JNLFSYNCLSTCK);
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#define CURRENT_WRITER jb->fsync_in_prog_latch.u.parts.latch_pid
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void jnl_fsync(gd_region *reg, uint4 fsync_addr)
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{
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jnl_private_control *jpc;
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jnl_buffer_ptr_t jb;
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uint4 lcnt, saved_dsk_addr, saved_status;
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sgmnt_addrs *csa;
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sgmnt_data_ptr_t csd;
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int4 lck_state;
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int fsync_ret, save_errno;
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csa = &FILE_INFO(reg)->s_addrs;
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jpc = csa->jnl;
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jb = jpc->jnl_buff;
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if ((NOJNL != jpc->channel) && !JNL_FILE_SWITCHED(jpc))
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{
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csd = csa->hdr;
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for (lcnt = 1; fsync_addr > jb->fsync_dskaddr && !JNL_FILE_SWITCHED(jpc); lcnt++)
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{
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if (MAX_FSYNC_WAIT_CNT / 2 == lcnt) /* half way into the wait timeout */
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{
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saved_status = jpc->status;
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jpc->status = SS_NORMAL;
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DEBUG_ONLY(
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if (CURRENT_WRITER)
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GET_C_STACK_FROM_SCRIPT("JNLFSYNCSTUCK_HALF_TIME",
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process_id, CURRENT_WRITER, ONCE);
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)
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jnl_send_oper(jpc, ERR_JNLFSYNCLSTCK);
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jpc->status = saved_status;
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} else if (MAX_FSYNC_WAIT_CNT < lcnt) /* timed-out waiting for the fsync lock */
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{
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saved_status = jpc->status;
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jpc->status = SS_NORMAL;
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if (CURRENT_WRITER)
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GET_C_STACK_FROM_SCRIPT("JNLFSYNCSTUCK", process_id, CURRENT_WRITER, TWICE);
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jnl_send_oper(jpc, ERR_JNLFSYNCLSTCK);
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jpc->status = saved_status;
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send_msg(VARLSTCNT(4) ERR_FSYNCTIMOUT, 2, JNL_LEN_STR(csd));
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GTMASSERT;
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}
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BG_TRACE_PRO_ANY(csa, n_jnl_fsync_tries);
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if (GET_SWAPLOCK(&jb->fsync_in_prog_latch))
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break;
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wcs_sleep(lcnt);
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/* trying to wake up the lock holder one iteration before calling c_script */
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if ((MAX_FSYNC_WAIT_CNT / 2 - 1 == lcnt) || (MAX_FSYNC_WAIT_CNT == lcnt))
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performCASLatchCheck(&jb->fsync_in_prog_latch, TRUE);
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}
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DEBUG_ONLY(
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if (gtm_white_box_test_case_enabled
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&& (WBTEST_EXTEND_JNL_FSYNC == gtm_white_box_test_case_number))
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{
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FPRINTF(stderr, "JNL_FSYNC: will sleep for 40 seconds\n", process_id);
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LONG_SLEEP(40);
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FPRINTF(stderr, "JNL_FSYNC: done sleeping\n", process_id);
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gtm_white_box_test_case_enabled = FALSE;
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}
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)
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if (fsync_addr > jb->fsync_dskaddr && !JNL_FILE_SWITCHED(jpc))
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{
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assert(process_id == jb->fsync_in_prog_latch.u.parts.latch_pid); /* assert we have the lock */
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saved_dsk_addr = jb->dskaddr;
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if (jpc->sync_io)
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{ /* We need to maintain the fsync control fields irrespective of the type of IO, because we might
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* switch between these at any time.
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*/
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jb->fsync_dskaddr = saved_dsk_addr;
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} else
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{
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GTM_FSYNC(jpc->channel, fsync_ret);
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if (-1 == fsync_ret)
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{
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save_errno = errno;
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assert(FALSE);
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send_msg(VARLSTCNT(9) ERR_JNLFSYNCERR, 2, JNL_LEN_STR(csd),
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ERR_TEXT, 2, RTS_ERROR_TEXT("Error with fsync"), save_errno);
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rts_error(VARLSTCNT(9) ERR_JNLFSYNCERR, 2, JNL_LEN_STR(csd),
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ERR_TEXT, 2, RTS_ERROR_TEXT("Error with fsync"), save_errno);
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} else
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{
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jb->fsync_dskaddr = saved_dsk_addr;
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BG_TRACE_PRO_ANY(csa, n_jnl_fsyncs);
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}
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}
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}
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if (process_id == jb->fsync_in_prog_latch.u.parts.latch_pid)
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RELEASE_SWAPLOCK(&jb->fsync_in_prog_latch);
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}
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return;
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}
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