uint4 jnl_file_open_switch(gd_region *reg, uint4 sts)
{
sgmnt_addrs *csa;
jnl_private_control *jpc;
jnl_create_info create;
char prev_jnl_fn[JNL_NAME_SIZE];
csa = &FILE_INFO(reg)->s_addrs;
jpc = csa->jnl;
assert((ERR_JNLFILOPN != sts) && (NOJNL != jpc->channel) || (ERR_JNLFILOPN == sts) && (NOJNL == jpc->channel));
if ((ERR_JNLFILOPN != sts) && (NOJNL != jpc->channel))
F_CLOSE(jpc->channel);
jpc->channel = NOJNL;
jnl_send_oper(jpc, sts);
/* attempt to create a new journal file */
memset(&create, 0, sizeof(create));
create.status = create.status2 = SS_NORMAL;
create.prev_jnl = &prev_jnl_fn[0];
set_jnl_info(reg, &create);
create.no_prev_link = TRUE;
create.no_rename = FALSE;
if (!jgbl.forw_phase_recovery)
JNL_SHORT_TIME(jgbl.gbl_jrec_time); /* needed for cre_jnl_file() */
/* else mur_output_record() would have already set jgbl.gbl_jrec_time */
assert(jgbl.gbl_jrec_time);
if (EXIT_NRM != cre_jnl_file(&create))
{
jpc->status = create.status;
jpc->status2 = create.status2;
return ERR_JNLINVALID;
} else
{
jpc->status = SS_NORMAL;
sts = 0;
}
send_msg(VARLSTCNT(6) ERR_PREVJNLLINKCUT, 4, JNL_LEN_STR(csa->hdr), DB_LEN_STR(reg));
assert(csa->hdr->jnl_file_len == create.jnl_len);
assert(0 == memcmp(csa->hdr->jnl_file_name, create.jnl, create.jnl_len));
return sts;
}
int jnl_file_extend(jnl_private_control *jpc, uint4 total_jnl_rec_size)
{
file_control *fc;
boolean_t need_extend;
jnl_buffer_ptr_t jb;
jnl_create_info jnl_info;
jnl_file_header header;
uint4 new_alq;
sgmnt_addrs *csa;
sgmnt_data_ptr_t csd;
char prev_jnl_fn[JNL_NAME_SIZE];
uint4 jnl_status = 0, status;
int new_blocks, result;
GTM_BAVAIL_TYPE avail_blocks;
uint4 aligned_tot_jrec_size, count;
switch(jpc->region->dyn.addr->acc_meth)
{
case dba_mm:
case dba_bg:
csa = &FILE_INFO(jpc->region)->s_addrs;
break;
default:
GTMASSERT;
}
csd = csa->hdr;
assert(csa == cs_addrs && csd == cs_data);
assert(csa->now_crit || (csd->clustered && (CCST_CLOSED == csa->nl->ccp_state)));
assert(jpc->region == gv_cur_region);
assert(csa->jnl_state == csd->jnl_state);
if (!JNL_ENABLED(csa) || (NOJNL == jpc->channel) || (JNL_FILE_SWITCHED(jpc)))
GTMASSERT; /* crit and messing with the journal file - how could it have vanished? */
if (!csd->jnl_deq)
{
assert(DIVIDE_ROUND_UP(total_jnl_rec_size, DISK_BLOCK_SIZE) <= csd->jnl_alq);
assert(csd->jnl_alq == csd->autoswitchlimit);
new_blocks = csd->jnl_alq;
} else
/* May cause extension of csd->jnl_deq * n blocks where n > 0 */
new_blocks = ROUND_UP(DIVIDE_ROUND_UP(total_jnl_rec_size, DISK_BLOCK_SIZE), csd->jnl_deq);
jpc->status = SS_NORMAL;
jb = jpc->jnl_buff;
assert(0 <= new_blocks);
DEBUG_ONLY(count = 0);
for (need_extend = (0 != new_blocks); need_extend; )
{
DEBUG_ONLY(count++);
/* usually we will do the loop just once where we do the file extension.
* rarely we might need to do an autoswitch instead after which again rarely
* we might need to do an extension on the new journal to fit in the transaction's journal requirements.
* therefore we should do this loop a maximum of twice. hence the assert below.
*/
assert(count <= 2);
need_extend = FALSE;
if (SS_NORMAL == (status = disk_block_available(jpc->channel, &avail_blocks, TRUE)))
{
if ((new_blocks * EXTEND_WARNING_FACTOR) > avail_blocks)
{
if (new_blocks > avail_blocks)
{ /* if we cannot satisfy the request, it is an error */
send_msg(VARLSTCNT(6) ERR_NOSPACEEXT, 4, JNL_LEN_STR(csd),
new_blocks, avail_blocks);
new_blocks = 0;
jpc->status = SS_NORMAL;
break;
} else
send_msg(VARLSTCNT(5) ERR_DSKSPACEFLOW, 3, JNL_LEN_STR(csd),
(avail_blocks - new_blocks));
}
} else
send_msg(VARLSTCNT(5) ERR_JNLFILEXTERR, 2, JNL_LEN_STR(csd), status);
new_alq = jb->filesize + new_blocks;
/* ensure current journal file size is well within autoswitchlimit --> design constraint */
assert(csd->autoswitchlimit >= jb->filesize);
if (csd->autoswitchlimit < (jb->filesize + (EXTEND_WARNING_FACTOR * new_blocks))) /* close to max */
send_msg(VARLSTCNT(5) ERR_JNLSPACELOW, 3, JNL_LEN_STR(csd), csd->autoswitchlimit - jb->filesize);
if (csd->autoswitchlimit < new_alq)
{ /* Reached max, need to autoswitch */
/* Ensure new journal file can hold the entire current transaction's journal record requirements */
assert(csd->autoswitchlimit >= MAX_REQD_JNL_FILE_SIZE(total_jnl_rec_size));
memset(&jnl_info, 0, sizeof(jnl_info));
jnl_info.prev_jnl = &prev_jnl_fn[0];
set_jnl_info(gv_cur_region, &jnl_info);
assert(JNL_ENABLED(csa) && (NOJNL != jpc->channel) && !(JNL_FILE_SWITCHED(jpc)));
jnl_status = jnl_ensure_open();
if (0 == jnl_status)
{ /* flush the cache and jnl-buffer-contents to current journal file before
* switching to a new journal. */
wcs_flu(WCSFLU_FLUSH_HDR | WCSFLU_WRITE_EPOCH);
jnl_file_close(gv_cur_region, TRUE, TRUE);
} else
rts_error(VARLSTCNT(7) jnl_status, 4, JNL_LEN_STR(csd), DB_LEN_STR(gv_cur_region), jpc->status);
assert(!jgbl.forw_phase_recovery || (NULL != jgbl.mur_pini_addr_reset_fnptr));
if (jgbl.forw_phase_recovery && (NULL != jgbl.mur_pini_addr_reset_fnptr))
(*jgbl.mur_pini_addr_reset_fnptr)();
assert(!jnl_info.no_rename);
assert(!jnl_info.no_prev_link);
if (EXIT_NRM == cre_jnl_file(&jnl_info))
{
assert(0 == memcmp(csd->jnl_file_name, jnl_info.jnl, jnl_info.jnl_len));
assert(csd->jnl_file_name[jnl_info.jnl_len] == '\0');
assert(csd->jnl_file_len == jnl_info.jnl_len);
assert(csd->jnl_buffer_size == jnl_info.buffer);
assert(csd->jnl_alq == jnl_info.alloc);
assert(csd->jnl_deq == jnl_info.extend);
assert(csd->jnl_before_image == jnl_info.before_images);
csd->trans_hist.header_open_tn = jnl_info.tn; /* needed for successful jnl_file_open() */
send_msg(VARLSTCNT(4) ERR_NEWJNLFILECREATE, 2, JNL_LEN_STR(csd));
fc = gv_cur_region->dyn.addr->file_cntl;
fc->op = FC_WRITE;
fc->op_buff = (sm_uc_ptr_t)csd;
status = dbfilop(fc);
if (SS_NORMAL != status)
send_msg(VARLSTCNT(5) ERR_DBFILERR, 2, DB_LEN_STR(gv_cur_region), status);
assert(JNL_ENABLED(csa));
/* call jnl_ensure_open instead of jnl_file_open to make sure jpc->pini_addr is set to 0 */
jnl_status = jnl_ensure_open(); /* sets jpc->status */
if (0 != jnl_status)
rts_error(VARLSTCNT(6) jnl_status, 4, JNL_LEN_STR(csd), DB_LEN_STR(gv_cur_region));
assert(jb->filesize == csd->jnl_alq);
aligned_tot_jrec_size = ALIGNED_ROUND_UP(MAX_REQD_JNL_FILE_SIZE(total_jnl_rec_size),
csd->jnl_alq, csd->jnl_deq);
if (aligned_tot_jrec_size > csd->jnl_alq)
{ /* need to extend more than initial allocation in the new journal file
* to accommodate the current transaction.
*/
new_blocks = aligned_tot_jrec_size - csd->jnl_alq;
assert(new_blocks);
assert(0 == new_blocks % csd->jnl_deq);
need_extend = TRUE;
}
} else
{
send_msg(VARLSTCNT(4) ERR_JNLCREATERR, 2, JNL_LEN_STR(csd));
jpc->status = ERR_JNLNOCREATE;
new_blocks = -1;
}
} else
{
assert(!need_extend); /* ensure we won't go through the for loop again */
/* Virtually extend currently used journal file */
jb->filesize = new_alq; /* Actually this is virtual file size blocks */
DO_FILE_READ(jpc->channel, 0, &header, JNL_HDR_LEN, jpc->status, jpc->status2);
if (SS_NORMAL != jpc->status)
rts_error(VARLSTCNT(5) ERR_JNLRDERR, 2, JNL_LEN_STR(csd), jpc->status);
assert((header.virtual_size + new_blocks) == new_alq);
header.virtual_size = new_alq;
DO_FILE_WRITE(jpc->channel, 0, &header, JNL_HDR_LEN, jpc->status, jpc->status2);
if (SS_NORMAL != jpc->status)
rts_error(VARLSTCNT(5) ERR_JNLWRERR, 2, JNL_LEN_STR(csd), jpc->status);
}
if (0 >= new_blocks)
break;
}
if (0 >= new_blocks)
{
jpc->status = ERR_JNLREADEOF;
jnl_file_lost(jpc, ERR_JNLEXTEND);
new_blocks = -1;
}
return new_blocks;
}
uint4 mur_process_intrpt_recov()
{
jnl_ctl_list *jctl, *last_jctl;
reg_ctl_list *rctl, *rctl_top;
int rename_fn_len, save_name_len;
char prev_jnl_fn[MAX_FN_LEN + 1], rename_fn[MAX_FN_LEN + 1], save_name[MAX_FN_LEN + 1];
jnl_create_info jnl_info;
uint4 status, status2;
uint4 max_autoswitchlimit, max_jnl_alq, max_jnl_deq, freeblks;
sgmnt_data_ptr_t csd;
#if defined(VMS)
io_status_block_disk iosb;
#endif
boolean_t jfh_changed;
for (rctl = mur_ctl, rctl_top = mur_ctl + murgbl.reg_total; rctl < rctl_top; rctl++)
{
gv_cur_region = rctl->gd; /* wcs_flu requires this to be set */
cs_addrs = rctl->csa;
csd = cs_data = rctl->csd; /* MM logic after wcs_flu call requires this to be set */
assert(csd == rctl->csa->hdr);
jctl = rctl->jctl_turn_around;
max_jnl_alq = max_jnl_deq = max_autoswitchlimit = 0;
for (last_jctl = NULL ; (NULL != jctl); last_jctl = jctl, jctl = jctl->next_gen)
{
if (max_autoswitchlimit < jctl->jfh->autoswitchlimit)
{ /* Note that max_jnl_alq, max_jnl_deq are not the maximum journal allocation/extensions across
* generations, but rather the allocation/extension corresponding to the maximum autoswitchlimit.
*/
max_autoswitchlimit = jctl->jfh->autoswitchlimit;
max_jnl_alq = jctl->jfh->jnl_alq;
max_jnl_deq = jctl->jfh->jnl_deq;
}
/* Until now, "rctl->blks_to_upgrd_adjust" holds the number of V4 format newly created bitmap blocks
* seen in INCTN records in backward processing. It is possible that backward processing might have
* missed out on seeing those INCTN records which are part of virtually-truncated or completely-rolled-bak
* journal files. The journal file-header has a separate field "prev_recov_blks_to_upgrd_adjust" which
* maintains exactly this count. Therefore adjust the rctl counter accordingly.
*/
assert(!jctl->jfh->prev_recov_blks_to_upgrd_adjust || !jctl->jfh->recover_interrupted);
assert(!jctl->jfh->prev_recov_blks_to_upgrd_adjust || jctl->jfh->prev_recov_end_of_data);
rctl->blks_to_upgrd_adjust += jctl->jfh->prev_recov_blks_to_upgrd_adjust;
}
if (max_autoswitchlimit > last_jctl->jfh->autoswitchlimit)
{
csd->jnl_alq = max_jnl_alq;
csd->jnl_deq = max_jnl_deq;
csd->autoswitchlimit = max_autoswitchlimit;
} else
{
assert(csd->jnl_alq == last_jctl->jfh->jnl_alq);
assert(csd->jnl_deq == last_jctl->jfh->jnl_deq);
assert(csd->autoswitchlimit == last_jctl->jfh->autoswitchlimit);
}
/* now that rctl->blks_to_upgrd_adjust is completely computed, use that to increment filehdr blks_to_upgrd. */
csd->blks_to_upgrd += rctl->blks_to_upgrd_adjust;
if (csd->blks_to_upgrd)
csd->fully_upgraded = FALSE;
jctl = rctl->jctl_turn_around;
csd->trans_hist.early_tn = jctl->turn_around_tn;
csd->trans_hist.curr_tn = csd->trans_hist.early_tn; /* INCREMENT_CURR_TN macro not used but noted in comment
* to identify all places that set curr_tn */
csd->jnl_eovtn = csd->trans_hist.curr_tn;
csd->turn_around_point = TRUE;
/* MUPIP REORG UPGRADE/DOWNGRADE stores its partially processed state in the database file header.
* It is difficult for recovery to restore those fields to a correct partial value.
* Hence reset the related fields as if the desired_db_format got set just ONE tn BEFORE the EPOCH record
* and that there was no more processing that happened.
* This might potentially mean some duplicate processing for MUPIP REORG UPGRADE/DOWNGRADE after the recovery.
* But that will only be the case as long as the database is in compatibility (mixed) mode (hopefully not long).
*/
if (csd->desired_db_format_tn >= jctl->turn_around_tn)
csd->desired_db_format_tn = jctl->turn_around_tn - 1;
if (csd->reorg_db_fmt_start_tn >= jctl->turn_around_tn)
csd->reorg_db_fmt_start_tn = jctl->turn_around_tn - 1;
if (csd->tn_upgrd_blks_0 > jctl->turn_around_tn)
csd->tn_upgrd_blks_0 = (trans_num)-1;
csd->reorg_upgrd_dwngrd_restart_block = 0;
/* Compute current value of "free_blocks" based on the value of "free_blocks" at the turnaround point epoch
* record and the change in "total_blks" since that epoch to the present form of the database. Any difference
* in "total_blks" implies database file extensions happened since the turnaround point. A backward rollback
* undoes everything (including all updates) except file extensions (it does not truncate the file size).
* Therefore every block that was newly allocated as part of those file extensions should be considered FREE
* for the current calculations except for the local bitmap blocks which are BUSY the moment they are created.
*/
assert(rctl->trnarnd_total_blks <= csd->trans_hist.total_blks);
csd->trans_hist.free_blocks = rctl->trnarnd_free_blocks + (csd->trans_hist.total_blks - rctl->trnarnd_total_blks)
- DIVIDE_ROUND_UP(csd->trans_hist.total_blks, BLKS_PER_LMAP)
+ DIVIDE_ROUND_UP(rctl->trnarnd_total_blks, BLKS_PER_LMAP);
assert((freeblks = mur_blocks_free(rctl)) == csd->trans_hist.free_blocks);
if (dba_bg == csd->acc_meth)
/* This is taken from bt_refresh() */
((th_rec *)((uchar_ptr_t)cs_addrs->th_base + cs_addrs->th_base->tnque.fl))->tn = jctl->turn_around_tn - 1;
wcs_flu(WCSFLU_FLUSH_HDR | WCSFLU_FSYNC_DB);
csd->turn_around_point = FALSE;
/* In case this is MM and wcs_flu() remapped an extended database, reset rctl->csd */
assert((dba_mm == cs_data->acc_meth) || (rctl->csd == cs_data));
rctl->csd = cs_data;
}
for (rctl = mur_ctl, rctl_top = mur_ctl + murgbl.reg_total; rctl < rctl_top; rctl++)
{
if (!rctl->jfh_recov_interrupted)
jctl = rctl->jctl_turn_around;
else
{
DEBUG_ONLY(
for (jctl = rctl->jctl_turn_around; NULL != jctl->next_gen; jctl = jctl->next_gen)
;
/* check that latest gener file name does not match db header */
assert((rctl->csd->jnl_file_len != jctl->jnl_fn_len)
|| (0 != memcmp(rctl->csd->jnl_file_name, jctl->jnl_fn, jctl->jnl_fn_len)));
)
jctl = rctl->jctl_alt_head;
}
assert(NULL != jctl);
for ( ; NULL != jctl->next_gen; jctl = jctl->next_gen)
;
assert(rctl->csd->jnl_file_len == jctl->jnl_fn_len); /* latest gener file name */
assert(0 == memcmp(rctl->csd->jnl_file_name, jctl->jnl_fn, jctl->jnl_fn_len)); /* should match db header */
if (SS_NORMAL != (status = prepare_unique_name((char *)jctl->jnl_fn, jctl->jnl_fn_len, "", "",
rename_fn, &rename_fn_len, &status2)))
return status;
jctl->jnl_fn_len = rename_fn_len; /* change the name in memory to the proposed name */
memcpy(jctl->jnl_fn, rename_fn, rename_fn_len + 1);
/* Rename hasn't happened yet at the filesystem level. In case current recover command is interrupted,
* we need to update jfh->next_jnl_file_name before mur_forward(). Update jfh->next_jnl_file_name for
* all journal files from which PBLK records were applied. Create new journal files for forward play.
*/
assert(NULL != rctl->jctl_turn_around);
jctl = rctl->jctl_turn_around; /* points to journal file which has current recover's turn around point */
assert(0 != jctl->turn_around_offset);
jctl->jfh->turn_around_offset = jctl->turn_around_offset; /* save progress in file header for */
jctl->jfh->turn_around_time = jctl->turn_around_time; /* possible re-issue of recover */
jfh_changed = TRUE;
for ( ; NULL != jctl; jctl = jctl->next_gen)
{ /* setup the next_jnl links. note that in the case of interrupted recovery, next_jnl links
* would have been already set starting from the turn-around point journal file of the
* interrupted recovery but the new recovery MIGHT have taken us to a still previous
* generation journal file that needs its next_jnl link set. this is why we do the next_jnl
* link setup even in the case of interrupted recovery although in most cases it is unnecessary.
*/
if (NULL != jctl->next_gen)
{
jctl->jfh->next_jnl_file_name_length = jctl->next_gen->jnl_fn_len;
memcpy(jctl->jfh->next_jnl_file_name, jctl->next_gen->jnl_fn, jctl->next_gen->jnl_fn_len);
jfh_changed = TRUE;
} else
assert(0 == jctl->jfh->next_jnl_file_name_length); /* null link from latest generation */
if (jctl->jfh->turn_around_offset && (jctl != rctl->jctl_turn_around))
{ /* It is possible that the current recovery has a turn-around-point much before the
* previously interrupted recovery. If it happens to be a previous generation journal
* file then we have to reset the original turn-around-point to be zero in the journal
* file header in order to ensure if this recovery gets interrupted we do interrupted
* recovery processing until the new turn-around-point instead of stopping incorrectly
* at the original turn-around-point itself. Note that there could be more than one
* journal file with a non-zero turn_around_offset (depending on how many previous
* recoveries got interrupted in this loop) that need to be reset.
*/
assert(!jctl->turn_around_offset);
assert(rctl->recov_interrupted); /* rctl->jfh_recov_interrupted can fail */
jctl->jfh->turn_around_offset = 0;
jctl->jfh->turn_around_time = 0;
jfh_changed = TRUE;
}
if (jfh_changed)
{
DO_FILE_WRITE(jctl->channel, 0, jctl->jfh, REAL_JNL_HDR_LEN, jctl->status, jctl->status2);
if (SS_NORMAL != jctl->status)
{
assert(FALSE);
if (SS_NORMAL == jctl->status2)
gtm_putmsg(VARLSTCNT(5) ERR_JNLWRERR, 2, jctl->jnl_fn_len,
jctl->jnl_fn, jctl->status);
else
gtm_putmsg(VARLSTCNT1(6) ERR_JNLWRERR, 2, jctl->jnl_fn_len,
jctl->jnl_fn, jctl->status, PUT_SYS_ERRNO(jctl->status2));
return jctl->status;
}
UNIX_ONLY(
GTM_FSYNC(jctl->channel, jctl->status);
if (-1 == jctl->status)
{
jctl->status2 = errno;
assert(FALSE);
gtm_putmsg(VARLSTCNT(9) ERR_JNLFSYNCERR, 2,
jctl->jnl_fn_len, jctl->jnl_fn,
ERR_TEXT, 2, RTS_ERROR_TEXT("Error with fsync"), jctl->status2);
return ERR_JNLFSYNCERR;
}
)
}
jfh_changed = FALSE;
}
memset(&jnl_info, 0, SIZEOF(jnl_info));
jnl_info.status = jnl_info.status2 = SS_NORMAL;
jnl_info.prev_jnl = &prev_jnl_fn[0];
set_jnl_info(rctl->gd, &jnl_info);
jnl_info.prev_jnl_len = rctl->jctl_turn_around->jnl_fn_len;
memcpy(jnl_info.prev_jnl, rctl->jctl_turn_around->jnl_fn, rctl->jctl_turn_around->jnl_fn_len);
jnl_info.prev_jnl[jnl_info.prev_jnl_len] = 0;
jnl_info.jnl_len = rctl->csd->jnl_file_len;
memcpy(jnl_info.jnl, rctl->csd->jnl_file_name, jnl_info.jnl_len);
jnl_info.jnl[jnl_info.jnl_len] = 0;
assert(!mur_options.rollback || jgbl.mur_rollback);
jnl_info.reg_seqno = rctl->jctl_turn_around->turn_around_seqno;
jgbl.gbl_jrec_time = rctl->jctl_turn_around->turn_around_time; /* time needed for cre_jnl_file_common() */
if (EXIT_NRM != cre_jnl_file_common(&jnl_info, rename_fn, rename_fn_len))
{
gtm_putmsg(VARLSTCNT(4) ERR_JNLNOCREATE, 2, jnl_info.jnl_len, jnl_info.jnl);
return jnl_info.status;
}
if (NULL != rctl->jctl_alt_head) /* remove the journal files created by last interrupted recover process */
{
mur_rem_jctls(rctl);
rctl->jctl_alt_head = NULL;
}
/* From this point on, journal records are written into the newly created journal file. However, we still read
* from old journal files.
*/
}
uint4 jnl_file_extend(jnl_private_control *jpc, uint4 total_jnl_rec_size)
{
file_control *fc;
boolean_t need_extend;
jnl_buffer_ptr_t jb;
jnl_create_info jnl_info;
jnl_file_header *header;
unsigned char hdr_buff[REAL_JNL_HDR_LEN + MAX_IO_BLOCK_SIZE];
uint4 new_alq;
sgmnt_addrs *csa;
sgmnt_data_ptr_t csd;
char prev_jnl_fn[JNL_NAME_SIZE];
uint4 jnl_status = 0, status;
int new_blocks, warn_blocks, result;
gtm_uint64_t avail_blocks;
uint4 aligned_tot_jrec_size, count;
uint4 jnl_fs_block_size, read_write_size;
DCL_THREADGBL_ACCESS;
switch(jpc->region->dyn.addr->acc_meth)
{
case dba_mm:
case dba_bg:
csa = &FILE_INFO(jpc->region)->s_addrs;
break;
default:
GTMASSERT;
}
csd = csa->hdr;
assert(csa == cs_addrs && csd == cs_data);
assert(csa->now_crit || (csd->clustered && (CCST_CLOSED == csa->nl->ccp_state)));
assert(&FILE_INFO(jpc->region)->s_addrs == csa);
assert(csa->jnl_state == csd->jnl_state);
assertpro(JNL_ENABLED(csa) && (NOJNL != jpc->channel) && (!JNL_FILE_SWITCHED(jpc)));
/* crit and messing with the journal file - how could it have vanished? */
if (!csd->jnl_deq || (csd->jnl_alq + csd->jnl_deq > csd->autoswitchlimit))
{
assert(DIVIDE_ROUND_UP(total_jnl_rec_size, DISK_BLOCK_SIZE) <= csd->jnl_alq);
assert(csd->jnl_alq == csd->autoswitchlimit);
new_blocks = csd->jnl_alq;
} else
/* May cause extension of csd->jnl_deq * n blocks where n > 0 */
new_blocks = ROUND_UP(DIVIDE_ROUND_UP(total_jnl_rec_size, DISK_BLOCK_SIZE), csd->jnl_deq);
jpc->status = SS_NORMAL;
jb = jpc->jnl_buff;
assert(0 <= new_blocks);
DEBUG_ONLY(count = 0);
for (need_extend = (0 != new_blocks); need_extend; )
{
DEBUG_ONLY(count++);
/* usually we will do the loop just once where we do the file extension.
* rarely we might need to do an autoswitch instead after which again rarely
* we might need to do an extension on the new journal to fit in the transaction's journal requirements.
* therefore we should do this loop a maximum of twice. hence the assert below.
*/
assert(count <= 2);
need_extend = FALSE;
if (SS_NORMAL == (status = disk_block_available(jpc->channel, &avail_blocks, TRUE)))
{
warn_blocks = (csd->jnl_alq + csd->jnl_deq > csd->autoswitchlimit)
? ((csd->jnl_deq > csd->autoswitchlimit) ? csd->jnl_deq : csd->autoswitchlimit)
: new_blocks;
if ((warn_blocks * EXTEND_WARNING_FACTOR) > avail_blocks)
{
if (new_blocks > avail_blocks)
{ /* If we cannot satisfy the request, it is an error, unless the anticipatory freeze
* scheme is in effect in which case, we will assume space is available even if
* it is not and go ahead with writes to the disk. If the writes fail with ENOSPC
* we will freeze the instance and wait for space to become available and keep
* retrying the writes. Therefore, we make the NOSPACEEXT a warning in this case.
*/
SETUP_THREADGBL_ACCESS;
if (!ANTICIPATORY_FREEZE_ENABLED(csa))
{
send_msg(VARLSTCNT(6) ERR_NOSPACEEXT, 4,
JNL_LEN_STR(csd), new_blocks, avail_blocks);
new_blocks = 0;
jpc->status = SS_NORMAL;
break;
} else
send_msg(VARLSTCNT(6) MAKE_MSG_WARNING(ERR_NOSPACEEXT), 4,
JNL_LEN_STR(csd), new_blocks, avail_blocks);
} else
send_msg(VARLSTCNT(5) ERR_DSKSPACEFLOW, 3, JNL_LEN_STR(csd), (avail_blocks - warn_blocks));
}
} else
send_msg(VARLSTCNT(5) ERR_JNLFILEXTERR, 2, JNL_LEN_STR(csd), status);
new_alq = jb->filesize + new_blocks;
/* ensure current journal file size is well within autoswitchlimit --> design constraint */
assert(csd->autoswitchlimit >= jb->filesize);
if (csd->autoswitchlimit < (jb->filesize + (EXTEND_WARNING_FACTOR * new_blocks))) /* close to max */
send_msg(VARLSTCNT(5) ERR_JNLSPACELOW, 3, JNL_LEN_STR(csd), csd->autoswitchlimit - jb->filesize);
if (csd->autoswitchlimit < new_alq)
{ /* Reached max, need to autoswitch */
/* Ensure new journal file can hold the entire current transaction's journal record requirements */
assert(csd->autoswitchlimit >= MAX_REQD_JNL_FILE_SIZE(total_jnl_rec_size));
memset(&jnl_info, 0, SIZEOF(jnl_info));
jnl_info.prev_jnl = &prev_jnl_fn[0];
set_jnl_info(gv_cur_region, &jnl_info);
assert(JNL_ENABLED(csa) && (NOJNL != jpc->channel) && !(JNL_FILE_SWITCHED(jpc)));
jnl_status = jnl_ensure_open();
if (0 == jnl_status)
{ /* flush the cache and jnl-buffer-contents to current journal file before
* switching to a new journal. Set a global variable in_jnl_file_autoswitch
* so jnl_write can know not to do the padding check. But because this is a global
* variable, we also need to make sure it is reset in case of errors during the
* autoswitch (or else calls to jnl_write after we are out of the autoswitch logic
* will continue to incorrectly not do the padding check. Hence a condition handler.
*/
assert(!in_jnl_file_autoswitch);
in_jnl_file_autoswitch = TRUE;
/* Also make sure time is not changed. This way if "jnl_write" as part of writing a
* journal record invokes jnl_file_extend, when the autoswitch is done and writing
* of the parent jnl_write resumes, we want it to continue with the same timestamp
* and not have to reset its time (non-trivial task) to reflect any changes since then.
*/
assert(!jgbl.save_dont_reset_gbl_jrec_time);
jgbl.save_dont_reset_gbl_jrec_time = jgbl.dont_reset_gbl_jrec_time;
jgbl.dont_reset_gbl_jrec_time = TRUE;
/* Establish a condition handler so we reset a few global variables that have
* temporarily been modified in case of errors inside wcs_flu/jnl_file_close.
*/
ESTABLISH_RET(jnl_file_autoswitch_ch, EXIT_ERR);
/* It is possible we still have not written a PINI record in this journal file
* (e.g. mupip extend saw the need to do jnl_file_extend inside jnl_write while
* trying to write a PINI record). Write a PINI record in that case before closing
* the journal file that way the EOF record will have a non-zero pini_addr.
*/
if (0 == jpc->pini_addr)
jnl_put_jrt_pini(csa);
wcs_flu(WCSFLU_FLUSH_HDR | WCSFLU_WRITE_EPOCH | WCSFLU_SPEEDUP_NOBEFORE);
jnl_file_close(gv_cur_region, TRUE, TRUE);
REVERT;
in_jnl_file_autoswitch = FALSE;
jgbl.dont_reset_gbl_jrec_time = jgbl.save_dont_reset_gbl_jrec_time;
DEBUG_ONLY(jgbl.save_dont_reset_gbl_jrec_time = FALSE);
assert((dba_mm == cs_data->acc_meth) || (csd == cs_data));
csd = cs_data; /* In MM, wcs_flu() can remap an extended DB, so reset csd to be sure */
} else
{
if (SS_NORMAL != jpc->status)
rts_error(VARLSTCNT(7) jnl_status, 4, JNL_LEN_STR(csd), DB_LEN_STR(gv_cur_region),
jpc->status);
else
rts_error(VARLSTCNT(6) jnl_status, 4, JNL_LEN_STR(csd), DB_LEN_STR(gv_cur_region));
}
assert(!jgbl.forw_phase_recovery || (NULL != jgbl.mur_pini_addr_reset_fnptr));
assert(jgbl.forw_phase_recovery || (NULL == jgbl.mur_pini_addr_reset_fnptr));
if (NULL != jgbl.mur_pini_addr_reset_fnptr)
(*jgbl.mur_pini_addr_reset_fnptr)(csa);
assert(!jnl_info.no_rename);
assert(!jnl_info.no_prev_link);
if (EXIT_NRM == cre_jnl_file(&jnl_info))
{
assert(0 == memcmp(csd->jnl_file_name, jnl_info.jnl, jnl_info.jnl_len));
assert(csd->jnl_file_name[jnl_info.jnl_len] == '\0');
assert(csd->jnl_file_len == jnl_info.jnl_len);
assert(csd->jnl_buffer_size == jnl_info.buffer);
assert(csd->jnl_alq == jnl_info.alloc);
assert(csd->jnl_deq == jnl_info.extend);
assert(csd->jnl_before_image == jnl_info.before_images);
csd->jnl_checksum = jnl_info.checksum;
csd->jnl_eovtn = csd->trans_hist.curr_tn;
send_msg(VARLSTCNT(4) ERR_NEWJNLFILECREAT, 2, JNL_LEN_STR(csd));
fc = gv_cur_region->dyn.addr->file_cntl;
fc->op = FC_WRITE;
fc->op_buff = (sm_uc_ptr_t)csd;
fc->op_len = SGMNT_HDR_LEN;
fc->op_pos = 1;
status = dbfilop(fc);
if (SS_NORMAL != status)
send_msg(VARLSTCNT(5) ERR_DBFILERR, 2, DB_LEN_STR(gv_cur_region), status);
assert(JNL_ENABLED(csa));
/* call jnl_ensure_open instead of jnl_file_open to make sure jpc->pini_addr is set to 0 */
jnl_status = jnl_ensure_open(); /* sets jpc->status */
if (0 != jnl_status)
{
if (jpc->status)
rts_error(VARLSTCNT(7) jnl_status, 4, JNL_LEN_STR(csd), DB_LEN_STR(gv_cur_region),
jpc->status);
else
rts_error(VARLSTCNT(6) jnl_status, 4, JNL_LEN_STR(csd), DB_LEN_STR(gv_cur_region));
}
assert(jb->filesize == csd->jnl_alq);
if (csd->jnl_alq + csd->jnl_deq <= csd->autoswitchlimit)
{
aligned_tot_jrec_size = ALIGNED_ROUND_UP(MAX_REQD_JNL_FILE_SIZE(total_jnl_rec_size),
csd->jnl_alq, csd->jnl_deq);
if (aligned_tot_jrec_size > csd->jnl_alq)
{ /* need to extend more than initial allocation in the new journal file
* to accommodate the current transaction.
*/
new_blocks = aligned_tot_jrec_size - csd->jnl_alq;
assert(new_blocks);
assert(0 == new_blocks % csd->jnl_deq);
need_extend = TRUE;
}
}
} else
{
send_msg(VARLSTCNT(4) ERR_JNLNOCREATE, 2, JNL_LEN_STR(csd));
jpc->status = ERR_JNLNOCREATE;
new_blocks = -1;
}
} else
{
assert(!need_extend); /* ensure we won't go through the for loop again */
/* Virtually extend currently used journal file */
jnl_fs_block_size = jb->fs_block_size;
header = (jnl_file_header *)(ROUND_UP2((uintszofptr_t)hdr_buff, jnl_fs_block_size));
read_write_size = ROUND_UP2(REAL_JNL_HDR_LEN, jnl_fs_block_size);
assert((unsigned char *)header + read_write_size <= ARRAYTOP(hdr_buff));
DO_FILE_READ(jpc->channel, 0, header, read_write_size, jpc->status, jpc->status2);
if (SS_NORMAL != jpc->status)
{
assert(FALSE);
rts_error(VARLSTCNT(5) ERR_JNLRDERR, 2, JNL_LEN_STR(csd), jpc->status);
}
assert((header->virtual_size + new_blocks) == new_alq);
jb->filesize = new_alq; /* Actually this is virtual file size blocks */
header->virtual_size = new_alq;
JNL_DO_FILE_WRITE(csa, csd->jnl_file_name, jpc->channel, 0,
header, read_write_size, jpc->status, jpc->status2);
if (SS_NORMAL != jpc->status)
{
assert(FALSE);
rts_error(VARLSTCNT(5) ERR_JNLWRERR, 2, JNL_LEN_STR(csd), jpc->status);
}
}
if (0 >= new_blocks)
break;
}
if (0 < new_blocks)
{
INCR_GVSTATS_COUNTER(csa, csa->nl, n_jnl_extends, 1);
return EXIT_NRM;
}
jpc->status = ERR_JNLREADEOF;
jnl_file_lost(jpc, ERR_JNLEXTEND);
return EXIT_ERR;
}
uint4 mur_process_intrpt_recov()
{
jnl_ctl_list *jctl, *last_jctl;
reg_ctl_list *rctl, *rctl_top;
int rename_fn_len, save_name_len, idx;
char prev_jnl_fn[MAX_FN_LEN + 1], rename_fn[MAX_FN_LEN + 1], save_name[MAX_FN_LEN + 1];
jnl_create_info jnl_info;
uint4 status, status2;
uint4 max_autoswitchlimit, max_jnl_alq, max_jnl_deq, freeblks;
sgmnt_data_ptr_t csd;
jnl_private_control *jpc;
jnl_buffer_ptr_t jbp;
boolean_t jfh_changed;
jnl_record *jnlrec;
jnl_file_header *jfh;
jnl_tm_t now;
for (rctl = mur_ctl, rctl_top = mur_ctl + murgbl.reg_total; rctl < rctl_top; rctl++)
{
TP_CHANGE_REG(rctl->gd);
csd = cs_data; /* MM logic after wcs_flu call requires this to be set */
assert(csd == rctl->csa->hdr);
jctl = rctl->jctl_turn_around;
max_jnl_alq = max_jnl_deq = max_autoswitchlimit = 0;
for (last_jctl = NULL ; (NULL != jctl); last_jctl = jctl, jctl = jctl->next_gen)
{
jfh = jctl->jfh;
if (max_autoswitchlimit < jfh->autoswitchlimit)
{ /* Note that max_jnl_alq, max_jnl_deq are not the maximum journal allocation/extensions across
* generations, but rather the allocation/extension corresponding to the maximum autoswitchlimit.
*/
max_autoswitchlimit = jfh->autoswitchlimit;
max_jnl_alq = jfh->jnl_alq;
max_jnl_deq = jfh->jnl_deq;
}
/* Until now, "rctl->blks_to_upgrd_adjust" holds the number of V4 format newly created bitmap blocks
* seen in INCTN records in backward processing. It is possible that backward processing might have
* missed out on seeing those INCTN records which are part of virtually-truncated or completely-rolled-bak
* journal files. The journal file-header has a separate field "prev_recov_blks_to_upgrd_adjust" which
* maintains exactly this count. Therefore adjust the rctl counter accordingly.
*/
assert(!jfh->prev_recov_blks_to_upgrd_adjust || !jfh->recover_interrupted);
assert(!jfh->prev_recov_blks_to_upgrd_adjust || jfh->prev_recov_end_of_data);
rctl->blks_to_upgrd_adjust += jfh->prev_recov_blks_to_upgrd_adjust;
}
if (max_autoswitchlimit > last_jctl->jfh->autoswitchlimit)
{
csd->jnl_alq = max_jnl_alq;
csd->jnl_deq = max_jnl_deq;
csd->autoswitchlimit = max_autoswitchlimit;
} else
{
assert(csd->jnl_alq == last_jctl->jfh->jnl_alq);
assert(csd->jnl_deq == last_jctl->jfh->jnl_deq);
assert(csd->autoswitchlimit == last_jctl->jfh->autoswitchlimit);
}
jctl = rctl->jctl_turn_around;
/* Get a pointer to the turn around point EPOCH record */
jnlrec = rctl->mur_desc->jnlrec;
assert(JRT_EPOCH == jnlrec->prefix.jrec_type);
assert(jctl->turn_around_time == jnlrec->prefix.time);
assert(jctl->turn_around_seqno == jnlrec->jrec_epoch.jnl_seqno);
assert(jctl->turn_around_tn == jnlrec->prefix.tn);
assert(jctl->rec_offset == jctl->turn_around_offset);
/* Reset file-header "blks_to_upgrd" counter to the turn around point epoch value. Adjust this to include
* the number of new V4 format bitmaps created by post-turnaround-point db file extensions.
* The adjustment value is maintained in rctl->blks_to_upgrd_adjust.
*/
csd->blks_to_upgrd = jnlrec->jrec_epoch.blks_to_upgrd;
csd->blks_to_upgrd += rctl->blks_to_upgrd_adjust;
# ifdef GTM_TRIGGER
/* online rollback can potentially take the database to a point in the past where the triggers that were
* previously installed are no longer a part of the current database state and so any process that restarts
* AFTER online rollback completes SHOULD reload triggers and the only way to do that is by incrementing the
* db_trigger_cycle in the file header.
*/
if (jgbl.onlnrlbk && (0 < csd->db_trigger_cycle))
{ /* check for non-zero db_trigger_cycle is to prevent other processes (continuing after online rollback)
* to establish implicit TP (on seeing the trigger cycle mismatch) when there are actually no triggers
* installed in the database (because there were none at the start of online rollback).
*/
csd->db_trigger_cycle++;
if (0 == csd->db_trigger_cycle)
csd->db_trigger_cycle = 1; /* Don't allow cycle set to 0 which means uninitialized */
}
# endif
assert((WBTEST_ALLOW_ARBITRARY_FULLY_UPGRADED == gtm_white_box_test_case_number) ||
(FALSE == jctl->turn_around_fullyupgraded) || (TRUE == jctl->turn_around_fullyupgraded));
/* Set csd->fully_upgraded to FALSE if:
* a) The turn around EPOCH had the fully_upgraded field set to FALSE
* OR
* b) If csd->blks_to_upgrd counter is non-zero. This field can be non-zero even if the turnaround EPOCH's
* fully_upgraded field is TRUE. This is possible if the database was downgraded to V4 (post turnaround EPOCH)
* format and database extensions happened causing new V4 format bitmap blocks to be written. The count of V4
* format bitmap blocks is maintained ONLY as part of INCTN records (with INCTN opcode SET_JNL_FILE_CLOSE_EXTEND)
* noted down in rctl->blks_to_upgrd_adjust counter as part of BACKWARD processing which are finally added to
* csd->blks_to_upgrd.
*/
if (!jctl->turn_around_fullyupgraded || csd->blks_to_upgrd)
csd->fully_upgraded = FALSE;
csd->trans_hist.early_tn = jctl->turn_around_tn;
csd->trans_hist.curr_tn = csd->trans_hist.early_tn; /* INCREMENT_CURR_TN macro not used but noted in comment
* to identify all places that set curr_tn */
csd->jnl_eovtn = csd->trans_hist.curr_tn;
csd->turn_around_point = TRUE;
/* MUPIP REORG UPGRADE/DOWNGRADE stores its partially processed state in the database file header.
* It is difficult for recovery to restore those fields to a correct partial value.
* Hence reset the related fields as if the desired_db_format got set just ONE tn BEFORE the EPOCH record
* and that there was no more processing that happened.
* This might potentially mean some duplicate processing for MUPIP REORG UPGRADE/DOWNGRADE after the recovery.
* But that will only be the case as long as the database is in compatibility (mixed) mode (hopefully not long).
*/
if (csd->desired_db_format_tn >= jctl->turn_around_tn)
csd->desired_db_format_tn = jctl->turn_around_tn - 1;
if (csd->reorg_db_fmt_start_tn >= jctl->turn_around_tn)
csd->reorg_db_fmt_start_tn = jctl->turn_around_tn - 1;
if (csd->tn_upgrd_blks_0 > jctl->turn_around_tn)
csd->tn_upgrd_blks_0 = (trans_num)-1;
csd->reorg_upgrd_dwngrd_restart_block = 0;
/* Compute current value of "free_blocks" based on the value of "free_blocks" at the turnaround point epoch
* record and the change in "total_blks" since that epoch to the present form of the database. Any difference
* in "total_blks" implies database file extensions happened since the turnaround point. A backward rollback
* undoes everything (including all updates) except file extensions (it does not truncate the file size).
* Therefore every block that was newly allocated as part of those file extensions should be considered FREE
* for the current calculations except for the local bitmap blocks which are BUSY the moment they are created.
*/
assert(jnlrec->jrec_epoch.total_blks <= csd->trans_hist.total_blks);
csd->trans_hist.free_blocks = jnlrec->jrec_epoch.free_blocks
+ (csd->trans_hist.total_blks - jnlrec->jrec_epoch.total_blks)
- DIVIDE_ROUND_UP(csd->trans_hist.total_blks, BLKS_PER_LMAP)
+ DIVIDE_ROUND_UP(jnlrec->jrec_epoch.total_blks, BLKS_PER_LMAP);
assert(!csd->blks_to_upgrd || !csd->fully_upgraded);
assert((freeblks = mur_blocks_free(rctl)) == csd->trans_hist.free_blocks);
/* Update strm_reg_seqno[] in db file header to reflect the turn around point.
* Before updating "strm_reg_seqno", make sure value is saved into "save_strm_reg_seqno".
* This is relied upon by the function "mur_get_max_strm_reg_seqno" in case of interrupted rollback.
*/
for (idx = 0; idx < MAX_SUPPL_STRMS; idx++)
{
if (!csd->save_strm_reg_seqno[idx])
csd->save_strm_reg_seqno[idx] = csd->strm_reg_seqno[idx];
csd->strm_reg_seqno[idx] = jnlrec->jrec_epoch.strm_seqno[idx];
}
wcs_flu(WCSFLU_FLUSH_HDR | WCSFLU_FSYNC_DB);
assert(cs_addrs->ti->curr_tn == jctl->turn_around_tn);
# ifdef UNIX
if (jgbl.onlnrlbk)
{
if (dba_bg == cs_addrs->hdr->acc_meth)
{ /* dryclean the cache (basically reset the cycle fields in all teh cache records) so as to make
* GT.M processes that only does 'reads' to require crit and hence realize that online rollback
* is in progress
*/
bt_refresh(cs_addrs, FALSE); /* sets earliest bt TN to be the turn around TN */
}
db_csh_ref(cs_addrs, FALSE);
assert(NULL != cs_addrs->jnl);
jpc = cs_addrs->jnl;
assert(NULL != jpc->jnl_buff);
jbp = jpc->jnl_buff;
/* Since Rollback simulates the journal record along with the timestamp at which the update was made, it
* sets jgbl.dont_reset_gbl_jrec_time to TRUE so that during forward processing t_end or tp_tend does not
* reset the gbl_jrec_time to reflect the current time. But, with Online Rollback, one can have the shared
* memory up and running and hence can have jbp->prev_jrec_time to be the time of the most recent journal
* update made. Later in t_end/tp_tend, ADJUST_GBL_JREC_TIME is invoked which ensures that if ever
* gbl_jrec_time (the time of the current update) is less than jbp->prev_jrec_time (time of the latest
* journal update), dont_reset_gbl_jrec_time better be FALSE. But, this assert will trip since Rollback
* sets the latter to TRUE. To fix this, set jbp->prev_jrec_time to the turn around time stamp. This way
* we are guaranteed that all the updates done in the forward processing will have a timestamp that is
* greater than the turn around timestamp
*/
SET_JNLBUFF_PREV_JREC_TIME(jbp, jctl->turn_around_time, DO_GBL_JREC_TIME_CHECK_FALSE);
} else if (dba_bg == csd->acc_meth)
{ /* set earliest bt TN to be the turn-around TN (taken from bt_refresh()) */
SET_OLDEST_HIST_TN(cs_addrs, cs_addrs->ti->curr_tn - 1);
}
# else
if (dba_bg == csd->acc_meth)
{ /* set earliest bt TN to be the turn-around TN (taken from bt_refresh()) */
SET_OLDEST_HIST_TN(cs_addrs, cs_addrs->ti->curr_tn - 1);
}
# endif
csd->turn_around_point = FALSE;
assert(OLDEST_HIST_TN(cs_addrs) == (cs_addrs->ti->curr_tn - 1));
/* In case this is MM and wcs_flu() remapped an extended database, reset rctl->csd */
assert((dba_mm == cs_data->acc_meth) || (rctl->csd == cs_data));
rctl->csd = cs_data;
}
JNL_SHORT_TIME(now);
for (rctl = mur_ctl, rctl_top = mur_ctl + murgbl.reg_total; rctl < rctl_top; rctl++)
{
TP_CHANGE_REG_IF_NEEDED(rctl->gd);
if (!rctl->jfh_recov_interrupted)
jctl = rctl->jctl_turn_around;
else
{
DEBUG_ONLY(
for (jctl = rctl->jctl_turn_around; NULL != jctl->next_gen; jctl = jctl->next_gen)
;
/* check that latest gener file name does not match db header */
assert((rctl->csd->jnl_file_len != jctl->jnl_fn_len)
|| (0 != memcmp(rctl->csd->jnl_file_name, jctl->jnl_fn, jctl->jnl_fn_len)));
)
jctl = rctl->jctl_alt_head;
}
assert(NULL != jctl);
for ( ; NULL != jctl->next_gen; jctl = jctl->next_gen)
;
assert(rctl->csd->jnl_file_len == jctl->jnl_fn_len); /* latest gener file name */
assert(0 == memcmp(rctl->csd->jnl_file_name, jctl->jnl_fn, jctl->jnl_fn_len)); /* should match db header */
if (SS_NORMAL != (status = prepare_unique_name((char *)jctl->jnl_fn, jctl->jnl_fn_len, "", "",
rename_fn, &rename_fn_len, now, &status2)))
return status;
jctl->jnl_fn_len = rename_fn_len; /* change the name in memory to the proposed name */
memcpy(jctl->jnl_fn, rename_fn, rename_fn_len + 1);
/* Rename hasn't happened yet at the filesystem level. In case current recover command is interrupted,
* we need to update jfh->next_jnl_file_name before mur_forward(). Update jfh->next_jnl_file_name for
* all journal files from which PBLK records were applied. Create new journal files for forward play.
*/
assert(NULL != rctl->jctl_turn_around);
jctl = rctl->jctl_turn_around; /* points to journal file which has current recover's turn around point */
assert(0 != jctl->turn_around_offset);
jfh = jctl->jfh;
jfh->turn_around_offset = jctl->turn_around_offset; /* save progress in file header for */
jfh->turn_around_time = jctl->turn_around_time; /* possible re-issue of recover */
for (idx = 0; idx < MAX_SUPPL_STRMS; idx++)
jfh->strm_end_seqno[idx] = csd->strm_reg_seqno[idx];
jfh_changed = TRUE;
/* We are about to update the journal file header of the turnaround-point journal file to store the
* non-zero jfh->turn_around_offset. Ensure corresponding database is considered updated.
* This is needed in case journal recovery/rollback terminates abnormally and we go to mur_close_files.
* We need to ensure csd->recov_interrupted does not get reset to FALSE even if this region did not have
* have any updates to the corresponding database file otherwise. (GTM-8394)
*/
rctl->db_updated = TRUE;
for ( ; NULL != jctl; jctl = jctl->next_gen)
{ /* setup the next_jnl links. note that in the case of interrupted recovery, next_jnl links
* would have been already set starting from the turn-around point journal file of the
* interrupted recovery but the new recovery MIGHT have taken us to a still previous
* generation journal file that needs its next_jnl link set. this is why we do the next_jnl
* link setup even in the case of interrupted recovery although in most cases it is unnecessary.
*/
jfh = jctl->jfh;
if (NULL != jctl->next_gen)
{
jfh->next_jnl_file_name_length = jctl->next_gen->jnl_fn_len;
memcpy(jfh->next_jnl_file_name, jctl->next_gen->jnl_fn, jctl->next_gen->jnl_fn_len);
jfh_changed = TRUE;
} else
assert(0 == jfh->next_jnl_file_name_length); /* null link from latest generation */
if (jfh->turn_around_offset && (jctl != rctl->jctl_turn_around))
{ /* It is possible that the current recovery has a turn-around-point much before the
* previously interrupted recovery. If it happens to be a previous generation journal
* file then we have to reset the original turn-around-point to be zero in the journal
* file header in order to ensure if this recovery gets interrupted we do interrupted
* recovery processing until the new turn-around-point instead of stopping incorrectly
* at the original turn-around-point itself. Note that there could be more than one
* journal file with a non-zero turn_around_offset (depending on how many previous
* recoveries got interrupted in this loop) that need to be reset.
*/
assert(!jctl->turn_around_offset);
assert(rctl->recov_interrupted || rctl->jctl_apply_pblk); /* rctl->jfh_recov_interrupted can fail */
jfh->turn_around_offset = 0;
jfh->turn_around_time = 0;
jfh_changed = TRUE;
}
if (jfh_changed)
{
/* Since overwriting the journal file header (an already allocated block
* in the file) should not cause ENOSPC, we dont take the trouble of
* passing csa or jnl_fn (first two parameters). Instead we pass NULL.
*/
JNL_DO_FILE_WRITE(NULL, NULL, jctl->channel, 0, jfh,
REAL_JNL_HDR_LEN, jctl->status, jctl->status2);
if (SS_NORMAL != jctl->status)
{
assert(FALSE);
if (SS_NORMAL == jctl->status2)
gtm_putmsg_csa(CSA_ARG(rctl->csa) VARLSTCNT(5) ERR_JNLWRERR, 2, jctl->jnl_fn_len,
jctl->jnl_fn, jctl->status);
else
gtm_putmsg_csa(CSA_ARG(rctl->csa) VARLSTCNT1(6) ERR_JNLWRERR, 2, jctl->jnl_fn_len,
jctl->jnl_fn, jctl->status, PUT_SYS_ERRNO(jctl->status2));
return jctl->status;
}
GTM_JNL_FSYNC(rctl->csa, jctl->channel, jctl->status);
if (-1 == jctl->status)
{
jctl->status2 = errno;
assert(FALSE);
gtm_putmsg_csa(CSA_ARG(rctl->csa) VARLSTCNT(9) ERR_JNLFSYNCERR, 2,
jctl->jnl_fn_len, jctl->jnl_fn,
ERR_TEXT, 2, RTS_ERROR_TEXT("Error with fsync"), jctl->status2);
return ERR_JNLFSYNCERR;
}
}
jfh_changed = FALSE;
}
memset(&jnl_info, 0, SIZEOF(jnl_info));
jnl_info.status = jnl_info.status2 = SS_NORMAL;
jnl_info.prev_jnl = &prev_jnl_fn[0];
set_jnl_info(rctl->gd, &jnl_info);
jnl_info.prev_jnl_len = rctl->jctl_turn_around->jnl_fn_len;
memcpy(jnl_info.prev_jnl, rctl->jctl_turn_around->jnl_fn, rctl->jctl_turn_around->jnl_fn_len);
jnl_info.prev_jnl[jnl_info.prev_jnl_len] = 0;
jnl_info.jnl_len = rctl->csd->jnl_file_len;
memcpy(jnl_info.jnl, rctl->csd->jnl_file_name, jnl_info.jnl_len);
jnl_info.jnl[jnl_info.jnl_len] = 0;
assert(!mur_options.rollback || jgbl.mur_rollback);
jnl_info.reg_seqno = rctl->jctl_turn_around->turn_around_seqno;
jgbl.gbl_jrec_time = rctl->jctl_turn_around->turn_around_time; /* time needed for cre_jnl_file_common() */
if (EXIT_NRM != cre_jnl_file_common(&jnl_info, rename_fn, rename_fn_len))
{
gtm_putmsg_csa(CSA_ARG(rctl->csa) VARLSTCNT(4) ERR_JNLNOCREATE, 2, jnl_info.jnl_len, jnl_info.jnl);
return jnl_info.status;
}
# ifdef UNIX
if (jgbl.onlnrlbk)
{
cs_addrs = rctl->csa;
/* Mimic what jnl_file_close in case of cleanly a closed journal file */
jpc = cs_addrs->jnl; /* the previous loop makes sure cs_addrs->jnl->jnl_buff is valid*/
NULLIFY_JNL_FILE_ID(cs_addrs);
jpc->jnl_buff->cycle++; /* so that, all other processes knows to switch to newer journal file */
jpc->cycle--; /* decrement cycle so jnl_ensure_open() knows to reopen the journal */
}
# endif
if (NULL != rctl->jctl_alt_head) /* remove the journal files created by last interrupted recover process */
{
mur_rem_jctls(rctl);
rctl->jctl_alt_head = NULL;
}
/* From this point on, journal records are written into the newly created journal file. However, we still read
* from old journal files.
*/
}
