1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/****************************************************************
* *
* Copyright (c) 2007-2016 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* 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 "gdsroot.h"
#include "gdskill.h"
#include "gdsblk.h"
#include "gdsbt.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsfhead.h"
#include "gdscc.h"
#include "filestruct.h"
#include "jnl.h"
#include "t_busy2free.h"
#include "min_max.h"
#include "jnl_get_checksum.h"
GBLREF cw_set_element cw_set[];
GBLREF unsigned char cw_set_depth;
GBLREF uint4 dollar_tlevel;
GBLREF sgmnt_addrs *cs_addrs;
void t_busy2free(srch_blk_status *blkhist)
{
cw_set_element *cse;
sgmnt_addrs *csa;
blk_hdr_ptr_t old_block;
unsigned int bsiz;
jnl_buffer_ptr_t jbbp; /* jbbp is non-NULL only if before-image journaling */
assert(!dollar_tlevel);
assert(cw_set_depth < CDB_CW_SET_SIZE);
cse = &cw_set[cw_set_depth];
cse->mode = gds_t_busy2free;
cse->blk = blkhist->blk_num;
cse->old_block = blkhist->buffaddr;
old_block = (blk_hdr_ptr_t)cse->old_block;
/* t_busy2free operates on BUSY blocks and hence cse->blk_prior_state's free and recycled status is always set to FALSE */
BIT_CLEAR_FREE(cse->blk_prior_state);
BIT_CLEAR_RECYCLED(cse->blk_prior_state);
cse->blk_checksum = 0;
csa = cs_addrs;
assert(dba_bg == csa->hdr->acc_meth);
assert(NULL != old_block);
jbbp = (JNL_ENABLED(csa) && csa->jnl_before_image) ? csa->jnl->jnl_buff : NULL;
if ((NULL != jbbp) && (old_block->tn < jbbp->epoch_tn))
{ /* Pre-compute CHECKSUM. Since we dont necessarily hold crit at this point, ensure we never try to
* access the buffer more than the db blk_size.
*/
bsiz = MIN(old_block->bsiz, csa->hdr->blk_size);
cse->blk_checksum = jnl_get_checksum(old_block, csa, bsiz);
}
cse->upd_addr = NULL;
cse->jnl_freeaddr = 0; /* reset jnl_freeaddr that previous transaction might have filled in */
cse->done = FALSE;
blkhist->cse = cse; /* indicate to t_end/tp_tend that this block is part of the write-set */
cw_set_depth++;
}
|
