82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
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/****************************************************************
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* *
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* Copyright 2009, 2010 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_fcntl.h"
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#include "gtm_stat.h"
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#include "gtm_unistd.h"
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#include "gtm_permissions.h"
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#include "gtm_string.h"
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#include "gtm_stdio.h"
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#include "gtm_stdlib.h"
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#include "gtm_tempnam.h"
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#include "gtm_time.h"
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#include "gdsroot.h"
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#include "gdskill.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 "gdsblk.h"
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#include "gdsfhead.h"
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#include "filestruct.h"
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#include "error.h"
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#include "eintr_wrappers.h"
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#include "gtmio.h"
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#include "shmpool.h"
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#include "db_snapshot.h"
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#include "mupip_exit.h"
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/*
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* This function is called to read the before image from the snapshot file
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*/
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GBLREF sgmnt_addrs *cs_addrs;
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GBLREF gd_region *gv_cur_region;
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GTM_SNAPSHOT_ONLY(GBLDEF util_snapshot_ptr_t util_ss_ptr;)
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void ss_read_block(snapshot_context_ptr_t lcl_ss_ctx, block_id blk, sm_uc_ptr_t blk_buff_ptr)
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{
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int blk_size, pread_res;
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boolean_t issue_error;
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off_t blk_offset;
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sgmnt_addrs *csa;
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sgmnt_data_ptr_t csd;
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shm_snapshot_ptr_t ss_shm_ptr;
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error_def(ERR_SSPREMATEOF);
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error_def(ERR_SSFILOPERR);
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error_def(ERR_INTEGERRS);
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assert(-1 != lcl_ss_ctx->shdw_fd);
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csa = cs_addrs;
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csd = csa->hdr;
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ss_shm_ptr = lcl_ss_ctx->ss_shm_ptr;
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DBG_ENSURE_PTR_WITHIN_SS_BOUNDS(csa, (sm_uc_ptr_t)ss_shm_ptr);
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blk_size = csd->blk_size;
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blk_offset = (off_t)(lcl_ss_ctx->shadow_vbn - 1) * DISK_BLOCK_SIZE + (off_t)blk * blk_size;
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LSEEKREAD(lcl_ss_ctx->shdw_fd, blk_offset, (uchar_ptr_t) blk_buff_ptr, blk_size, pread_res);
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if (0 != pread_res)
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{
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if (-1 == pread_res)
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{
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gtm_putmsg(VARLSTCNT(7) ERR_SSPREMATEOF, 5, blk, blk_size, blk_offset,
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LEN_AND_STR(ss_shm_ptr->ss_info.shadow_file));
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} else
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{
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gtm_putmsg(VARLSTCNT(7) ERR_SSFILOPERR, 4, LEN_AND_LIT("read"),
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LEN_AND_STR(ss_shm_ptr->ss_info.shadow_file), pread_res);
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}
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mupip_exit(ERR_INTEGERRS);
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}
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}
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