88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2009 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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/* mu_reduce_level.c: Reduce level overwriting root with it's star-record-only child block. */
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#include "mdef.h"
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#include "gtm_string.h"
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#include "cdb_sc.h"
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#include "gdsroot.h"
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#include "gdsblk.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 "gdsfhead.h"
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#include "filestruct.h"
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#include "gdsblkops.h"
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#include "gdskill.h"
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#include "gdscc.h"
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#include "jnl.h"
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#include "copy.h"
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#include "muextr.h"
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#include "mu_reorg.h"
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/* Include prototypes */
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#include "t_write.h"
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#include "mupip_reorg.h"
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GBLREF gv_namehead *gv_target;
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GBLREF sgmnt_data_ptr_t cs_data;
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GBLREF uint4 update_array_size; /* for the BLK_* macros */
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GBLREF char *update_array, *update_array_ptr;
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GBLREF unsigned int t_tries;
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GBLREF uint4 t_err;
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/**************************************************************************************
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Input Parameters:
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(GBL_DEF) gv_target: For reference block's history
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Output Parameters:
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kill_set_ptr : List of blocks to be freed
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***************************************************************************************/
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enum cdb_sc mu_reduce_level(kill_set *kill_set_ptr)
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{
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int level;
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int old_blk_sz;
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int blk_seg_cnt, blk_size;
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blk_segment *bs_ptr1, *bs_ptr2;
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sm_uc_ptr_t old_blk_base, save_blk;
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level = gv_target->hist.depth;
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if (1 == level)
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return cdb_sc_oprnotneeded;
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blk_size = cs_data->blk_size;
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kill_set_ptr->used = 0;
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memset(kill_set_ptr, 0, SIZEOF(kill_set));
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CHECK_AND_RESET_UPDATE_ARRAY; /* reset update_array_ptr to update_array */
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old_blk_base = gv_target->hist.h[level].buffaddr;
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old_blk_sz = ((blk_hdr_ptr_t)(old_blk_base))->bsiz;
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if (SIZEOF(blk_hdr) + BSTAR_REC_SIZE != old_blk_sz)
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return cdb_sc_oprnotneeded;
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old_blk_base = gv_target->hist.h[level-1].buffaddr;
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old_blk_sz = ((blk_hdr_ptr_t)(old_blk_base))->bsiz;
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BLK_ADDR(save_blk, old_blk_sz - SIZEOF(blk_hdr), unsigned char);
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memcpy(save_blk, old_blk_base + SIZEOF(blk_hdr), old_blk_sz - SIZEOF(blk_hdr));
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BLK_INIT(bs_ptr2, bs_ptr1);
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BLK_SEG(bs_ptr2, save_blk, old_blk_sz - SIZEOF(blk_hdr));
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if (!BLK_FINI(bs_ptr2, bs_ptr1))
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{
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assert(t_tries < CDB_STAGNATE);
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return cdb_sc_blkmod;
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}
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t_write(&gv_target->hist.h[level], (unsigned char *)bs_ptr1, 0, 0, level - 1, TRUE, TRUE, GDS_WRITE_KILLTN);
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kill_set_ptr->blk[kill_set_ptr->used].flag = 0;
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kill_set_ptr->blk[kill_set_ptr->used].level = 0;
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kill_set_ptr->blk[kill_set_ptr->used++].block = gv_target->hist.h[level-1].blk_num;
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return cdb_sc_normal;
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}
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