142 lines
4.4 KiB
C
142 lines
4.4 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 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 "gdsroot.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 "gdsbml.h"
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#include "dbfilop.h"
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#include "gdsdbver.h"
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#include "gdsblk.h"
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#include "iosp.h"
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#include "mupint.h"
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#include "gds_blk_upgrade.h"
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#ifdef GTM_CRYPT
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#include "gtmcrypt.h"
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#endif
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#include "min_max.h"
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#ifdef GTM_SNAPSHOT
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#include "shmpool.h" /* Needed for DBG_ENSURE_PTR_WITHIN_SS_BOUNDS */
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#include "db_snapshot.h"
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#endif
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#include "mupip_exit.h"
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GBLREF sgmnt_data mu_int_data;
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GBLREF int4 mu_int_ovrhd;
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GBLREF gd_region *gv_cur_region;
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GTMCRYPT_ONLY(
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GBLREF gtmcrypt_key_t mu_int_encrypt_key_handle;
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)
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GBLREF boolean_t ointeg_this_reg;
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GBLREF sgmnt_addrs *cs_addrs;
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GBLREF uint4 mu_int_errknt;
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uchar_ptr_t mu_int_read(block_id blk, enum db_ver *ondsk_blkver)
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{
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int4 status;
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file_control *fc;
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unsigned char *tmp_ptr;
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GTMCRYPT_ONLY(
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int req_dec_blk_size;
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int crypt_status;
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)
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boolean_t have_blk = FALSE;
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sgmnt_addrs *csa;
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GTM_SNAPSHOT_ONLY(
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boolean_t read_failed;
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shm_snapshot_t *ss_shm_ptr;
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)
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error_def(ERR_DBRDERR);
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error_def(ERR_DYNUPGRDFAIL);
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error_def(ERR_REGSSFAIL);
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error_def(ERR_INTEGERRS);
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csa = cs_addrs;
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tmp_ptr = malloc(mu_int_data.blk_size);
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# ifdef GTM_SNAPSHOT
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if (ointeg_this_reg)
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{
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assert(NULL != csa->ss_ctx);
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ss_shm_ptr = (SS_CTX_CAST(csa->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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if (!ss_shm_ptr->failure_errno)
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have_blk = ss_get_block(csa, blk, tmp_ptr);
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else
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{ /* GT.M has failed initiating snapshot resources. Report error and exit so that we don't continue with
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* an INTEG which is unusable. Note that, it's okay to check failure_errno (in the shared memory) outside
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* crit as GT.M is the only one that sets it and INTEG (while doing snapshot cleanup) is the only one
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* that resets it
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*/
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gtm_putmsg(VARLSTCNT(5) ERR_REGSSFAIL, 3, ss_shm_ptr->failed_pid, DB_LEN_STR(gv_cur_region));
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mupip_exit(ERR_INTEGERRS);
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}
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}
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# endif
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if (!have_blk)
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{
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fc = gv_cur_region->dyn.addr->file_cntl;
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fc->op = FC_READ;
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fc->op_buff = tmp_ptr;
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fc->op_len = mu_int_data.blk_size;
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fc->op_pos = mu_int_ovrhd + (mu_int_data.blk_size / DISK_BLOCK_SIZE * blk);
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dbfilop(fc); /* No return if error */
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# ifdef GTM_SNAPSHOT
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if (ointeg_this_reg)
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{
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assert(NULL != ss_shm_ptr); /* should have been initialized above */
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/* Since we did not have locks up, ensure we didn't miss a before-image while we were reading
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* in this block. Note we don't have to check the return status since it will either get the
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* before-image or not.
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*/
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if (!ss_shm_ptr->failure_errno)
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ss_get_block(csa, blk, tmp_ptr);
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else
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{
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gtm_putmsg(VARLSTCNT(5) ERR_REGSSFAIL, 3, ss_shm_ptr->failed_pid, DB_LEN_STR(gv_cur_region));
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mupip_exit(ERR_INTEGERRS);
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}
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}
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# endif
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}
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# ifdef GTM_CRYPT
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req_dec_blk_size = MIN(mu_int_data.blk_size, ((blk_hdr_ptr_t)tmp_ptr)->bsiz) - SIZEOF(blk_hdr);
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if (BLOCK_REQUIRE_ENCRYPTION(mu_int_data.is_encrypted, (((blk_hdr_ptr_t)tmp_ptr)->levl), req_dec_blk_size))
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{
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/* The below assert cannot be moved before BLOCK_REQUIRE_ENCRYPTION check done above as tmp_ptr could
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* potentially point to a V4 block in which case the assert might fail when a V4 block is casted to
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* a V5 block header.
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*/
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assert(((blk_hdr_ptr_t)tmp_ptr)->bsiz <= mu_int_data.blk_size);
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assert(((blk_hdr_ptr_t)tmp_ptr)->bsiz >= SIZEOF(blk_hdr));
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GTMCRYPT_DECODE_FAST(mu_int_encrypt_key_handle,
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(char *)(tmp_ptr + SIZEOF(blk_hdr)),
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req_dec_blk_size,
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NULL,
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crypt_status);
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if (0 != crypt_status)
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GC_RTS_ERROR(crypt_status, gv_cur_region->dyn.addr->fname);
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}
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# endif
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GDS_BLK_UPGRADE_IF_NEEDED(blk, tmp_ptr, tmp_ptr, &mu_int_data, ondsk_blkver, status, mu_int_data.fully_upgraded);
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if (SS_NORMAL != status)
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if (ERR_DYNUPGRDFAIL == status)
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rts_error(VARLSTCNT(5) status, 3, blk, DB_LEN_STR(gv_cur_region));
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else
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rts_error(VARLSTCNT(1) status);
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return tmp_ptr;
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}
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