Add in -r support for btrace

Using Ubuntu, debugfs is mounted on /debug instead of /sys/kernel/debug. [Perhaps, we should put in blktrace a search through "common" areas where debug could be mounted, and or do a simple parsing of the output from a 'mount' command to /find/ the directory.]

#!/bin/sh
# Copyright (c) 2005 Silicon Graphics, Inc.
# All rights reserved.
#
# Nathan Scott <[email protected]>
# 14 Sep 2005 Initial version
#

TRACEOPTS=""
PARSEOPTS="-b100000"
SUMMARIZE=""
USAGE="Usage: btrace [-s] [-t] [-S] [-w N] [-a <trace>...] [-r <dbg mnt]<dev>..." DIRNAME=dirname $0

while getopts "a:r:stSw:hv" c
do

	case $c in
	a)	TRACEOPTS=$TRACEOPTS" -a "$OPTARG" ";;
	w)	TRACEOPTS=$TRACEOPTS" -w "$OPTARG" ";;
	n)	TRACEOPTS=$TRACEOPTS" -n "$OPTARG" ";;
	b)	TRACEOPTS=$TRACEOPTS" -b "$OPTARG" ";;
	r)	TRACEOPTS=$TRACEOPTS" -r "$OPTARG" ";;
	s)	PARSEOPTS=$PARSEOPTS" -s";;
	t)	PARSEOPTS=$PARSEOPTS" -t";;
	h)	PARSEOPTS=$PARSEOPTS" -h";;
	v)	PARSEOPTS=$PARSEOPTS" -v";;
	S)	SUMMARIZE="";;
	\?)	echo $USAGE 1>&2
		exit 2
		;;
	esac

done
PARSEOPTS="${PARSEOPTS} ${SUMMARIZE}"

shift expr $OPTIND - 1
if [ $# -eq 0 ]; then

	echo $USAGE 1>&2
	exit 2

fi

${DIRNAME}/blktrace ${TRACEOPTS} -o- $@ | ${DIRNAME}/blkparse ${PARSEOPTS} -i-

A search would be nice, probably /debug and /sys/kernel/debug are the only ones we are likely to see (unless the user is on an older system and decided to put it elsewhere manually).

For now I committed the updated btrace.

Jens Axboe