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/****************************************************************
* *
* Copyright (c) 2009-2023 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 "gtm_fcntl.h"
#include "gtm_stat.h"
#include "gtm_unistd.h"
#include "gtm_permissions.h"
#include "gtm_string.h"
#include "gtm_stdio.h"
#include "gtm_stdlib.h"
#include "gtm_tempnam.h"
#include "gtm_time.h"
#include "gdsroot.h"
#include "gdskill.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsblk.h"
#include "gdsfhead.h"
#include "filestruct.h"
#include "gtmio.h"
#include "util.h"
#include "eintr_wrappers.h"
#include "db_snapshot.h"
error_def(ERR_SSFILOPERR);
error_def(ERR_SSPREMATEOF);
static void ss_print_blk_details(block_id, blk_hdr_ptr_t);
static void ss_print_fil_hdr(snapshot_filhdr_ptr_t);
void ss_anal_shdw_file(char *filename, int flen)
{
int shdw_fd, num;
int status, db_blk_size;
off_t blk_offset;
snapshot_filhdr_t ss_filhdr;
blk_hdr_ptr_t bp = NULL;
block_id blkno, tot_blks, bitmap_size, shadow_vbn, word, bit;
unsigned int *bitmap_buffer = NULL;
OPENFILE(filename, O_RDONLY, shdw_fd);
if (FD_INVALID == shdw_fd)
{
status = errno;
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_SSFILOPERR, 4, LEN_AND_LIT("open"), flen, filename, status);
}
LSEEKREAD(shdw_fd, 0, ((sm_uc_ptr_t)&ss_filhdr), SNAPSHOT_HDR_SIZE, status);
if (0 != status)
{
if (-1 != status)
{
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_SSFILOPERR, 4, LEN_AND_LIT("read"), flen, filename, status);
return;
} else
{
util_out_print("!/Premature EOF with !AD", TRUE, flen, filename);
return;
}
}
bitmap_size = ss_filhdr.ss_info.ss_shmsize - SNAPSHOT_HDR_SIZE;
if (0 >= bitmap_size)
{
util_out_print("!/Incorrect snapshot file format", TRUE);
return;
}
ss_print_fil_hdr(&ss_filhdr);
bitmap_buffer = (unsigned int *)malloc(bitmap_size);
memset(bitmap_buffer, 0, bitmap_size);
LSEEKREAD(shdw_fd, SNAPSHOT_HDR_SIZE, (sm_uc_ptr_t)(bitmap_buffer), bitmap_size, status);
if (0 != status)
{
if (-1 != status)
{
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_SSFILOPERR, 4, LEN_AND_LIT("read"), flen, filename, status);
return;
} else
{
util_out_print("!/Premature EOF with !AD", TRUE, flen, filename);
return;
}
}
tot_blks = ss_filhdr.ss_info.total_blks;
shadow_vbn = ss_filhdr.ss_info.shadow_vbn;
db_blk_size = ss_filhdr.ss_info.db_blk_size;
assert(bitmap_size >= (tot_blks + 8 - 1) / 8);
bp = malloc(db_blk_size);
for (blkno = 0, num = bitmap_buffer[0]; blkno <= tot_blks; blkno++)
{
if (0 == blkno % BLKS_PER_WORD)
{
word = blkno / BLKS_PER_WORD;
num = bitmap_buffer[word];
}
bit = blkno % BLKS_PER_WORD;
if (num & (1 << bit))
{
blk_offset = (BLK_ZERO_OFF(shadow_vbn) + (off_t)blkno * db_blk_size);
LSEEKREAD(shdw_fd, blk_offset, bp, db_blk_size, status);
if (0 != status)
{
if (-1 != status)
{
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_SSFILOPERR, 4, LEN_AND_LIT("read"),
flen, filename, status);
return;
} else
{
gtm_putmsg_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_SSPREMATEOF, 5, &blkno,
db_blk_size, blk_offset, flen, filename);
return;
}
}
ss_print_blk_details(blkno, bp);
}
}
if (NULL != bitmap_buffer)
free(bitmap_buffer);
if (NULL != bp)
free(bp);
return;
}
static void ss_print_fil_hdr(snapshot_filhdr_ptr_t ss_filhdr_ptr)
{
util_out_print("----------------------------------------", TRUE);
util_out_print("Snapshot Initiator PID :!UL", TRUE, ss_filhdr_ptr->ss_info.ss_pid);
util_out_print("Snapshot TN :0x!16@XQ", TRUE, &ss_filhdr_ptr->ss_info.snapshot_tn);
util_out_print("DB Block Size :!UL", TRUE, ss_filhdr_ptr->ss_info.db_blk_size);
util_out_print("Free Blocks :!UL", TRUE, ss_filhdr_ptr->ss_info.free_blks);
util_out_print("Total Blocks :!UL", TRUE, ss_filhdr_ptr->ss_info.total_blks);
util_out_print("Shadow File :!AD", TRUE, ss_filhdr_ptr->shadow_file_len, ss_filhdr_ptr->ss_info.shadow_file);
util_out_print("Shadow Start VBN :!UL", TRUE, ss_filhdr_ptr->ss_info.shadow_vbn);
util_out_print("Shadow Shared Mem Size :!UL", TRUE, ss_filhdr_ptr->ss_info.ss_shmsize);
util_out_print("----------------------------------------", TRUE);
return;
}
static void ss_print_blk_details(block_id blk, blk_hdr_ptr_t bp)
{
util_out_print("--------------------------", TRUE);
util_out_print("Block Number : !UL", TRUE, blk);
util_out_print("Block TN : 0x!16@XQ", TRUE, &bp->tn);
util_out_print("Block Level : !UL", TRUE, bp->levl);
util_out_print("Block Size : !UL", TRUE, bp->bsiz);
util_out_print("--------------------------", TRUE);
return;
}
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