66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/****************************************************************
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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 "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 "wbox_test_init.h"
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GBLREF gd_region *gv_cur_region;
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/*
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* This function returns the before image of a block (if it exists in the snapshot file)
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*/
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boolean_t ss_get_block(sgmnt_addrs *csa, block_id blk, sm_uc_ptr_t blk_buff_ptr)
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{
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shm_snapshot_ptr_t ss_shm_ptr;
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snapshot_context_ptr_t lcl_ss_ctx;
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lcl_ss_ctx = SS_CTX_CAST(csa->ss_ctx);
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assert(NULL != lcl_ss_ctx);
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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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assert(ss_shm_ptr->in_use && SNAPSHOTS_IN_PROG(csa->nl));
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/* Ensure that we never try to request a block that is outside the snapshot range. The only exception is when GT.M
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* failed while initializing snapshot resources and hence refrained from writing before images. Include whitebox
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* test case to account for invalid snapshot
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*/
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assert((blk < ss_shm_ptr->ss_info.total_blks) || (WBTEST_INVALID_SNAPSHOT_EXPECTED == gtm_white_box_test_case_number));
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if (blk >= ss_shm_ptr->ss_info.total_blks)
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return FALSE;
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if (ss_chk_shdw_bitmap(csa, lcl_ss_ctx, blk))
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{
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ss_read_block(lcl_ss_ctx, blk, blk_buff_ptr); /* no return in case of failure */
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return TRUE;
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}
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return FALSE;
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}
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