68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
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/*
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* Copyright (c) 1992 The Regents of the University of California.
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* All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratories.
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*
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* %sccs.include.redist.c%
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*
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* %W% (Berkeley) %G%
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*
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* from: Header: sdtrace.h,v 1.6 92/12/02 03:53:47 torek Exp (LBL)
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* $Id: sdtrace.h,v 1.1 1993/10/27 17:48:44 deraadt Exp $
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*/
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/*
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* SCSI disk command tracing
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*/
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#if defined(SDTRACE) || !defined(KERNEL)
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struct sdtrace {
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struct timeval time; /* timestamp */
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u_int block; /* disk block */
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u_int bcount; /* # bytes transferred */
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u_char tcode; /* trace code */
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u_char target; /* target number */
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u_char unit; /* unit number on target */
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u_char read; /* read operation */
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};
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#define T_START 0x01
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#define T_MKCDB 0x02
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#define T_INTR 0x03
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#endif
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#ifdef SDTRACE
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/* Allow kernel config to override number of entries */
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#ifndef NSDOPBUF
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#define NSDOPBUF 1024
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#endif
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struct sdtrace sdopbuf[NSDOPBUF];
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struct sdtrace *sdopptr = sdopbuf;
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int nsdopbuf = NSDOPBUF; /* for sdtrace */
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u_long sdopcnt;
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#define SD_TRACE(code, sc, bp) { \
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if (++sdopptr >= &sdopbuf[NSDOPBUF]) \
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sdopptr = sdopbuf; \
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microtime(&sdopptr->time); \
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sdopptr->tcode = code; \
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sdopptr->read = bp->b_flags & B_READ; \
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sdopptr->block = bp->b_blkno; \
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sdopptr->bcount = bp->b_bcount; \
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sdopptr->target = sc->sc_unit.u_targ; \
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sdopptr->unit = sc->sc_unit.u_unit; \
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++sdopcnt; \
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}
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#else
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#define SD_TRACE(code, sc, bp) { }
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#endif
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