608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 1) #!/bin/bash
4f19048fd0a00 (Thomas Gleixner 2019-05-27 08:55:14 +0200 2) # SPDX-License-Identifier: GPL-2.0-only
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 3) # Translate the bits making up a GFP mask
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 4) # (c) 2009, Mel Gorman <mel@csn.ul.ie>
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 5) SOURCE=
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 6) GFPMASK=none
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 7)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 8) # Helper function to report failures and exit
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 9) die() {
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 10) echo ERROR: $@
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 11) if [ "$TMPFILE" != "" ]; then
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 12) rm -f $TMPFILE
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 13) fi
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 14) exit -1
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 15) }
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 16)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 17) usage() {
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 18) echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask"
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 19) exit 0
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 20) }
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 21)
3ad2f3fbb9614 (Daniel Mack 2010-02-03 08:01:28 +0800 22) # Parse command-line arguments
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 23) while [ $# -gt 0 ]; do
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 24) case $1 in
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 25) --source)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 26) SOURCE=$2
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 27) shift 2
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 28) ;;
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 29) -h)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 30) usage
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 31) ;;
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 32) --help)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 33) usage
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 34) ;;
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 35) *)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 36) GFPMASK=$1
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 37) shift
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 38) ;;
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 39) esac
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 40) done
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 41)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 42) # Guess the kernel source directory if it's not set. Preference is in order of
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 43) # o current directory
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 44) # o /usr/src/linux
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 45) if [ "$SOURCE" = "" ]; then
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 46) if [ -r "/usr/src/linux/Makefile" ]; then
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 47) SOURCE=/usr/src/linux
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 48) fi
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 49) if [ -r "`pwd`/Makefile" ]; then
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 50) SOURCE=`pwd`
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 51) fi
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 52) fi
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 53)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 54) # Confirm that a source directory exists
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 55) if [ ! -r "$SOURCE/Makefile" ]; then
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 56) die "Could not locate kernel source directory or it is invalid"
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 57) fi
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 58)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 59) # Confirm that a GFP mask has been specified
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 60) if [ "$GFPMASK" = "none" ]; then
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 61) usage
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 62) fi
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 63)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 64) # Extract GFP flags from the kernel source
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 65) TMPFILE=`mktemp -t gfptranslate-XXXXXX` || exit 1
27af038494ef2 (Mel Gorman 2010-11-24 12:57:17 -0800 66) grep -q ___GFP $SOURCE/include/linux/gfp.h
27af038494ef2 (Mel Gorman 2010-11-24 12:57:17 -0800 67) if [ $? -eq 0 ]; then
27af038494ef2 (Mel Gorman 2010-11-24 12:57:17 -0800 68) grep "^#define ___GFP" $SOURCE/include/linux/gfp.h | sed -e 's/u$//' | grep -v GFP_BITS > $TMPFILE
27af038494ef2 (Mel Gorman 2010-11-24 12:57:17 -0800 69) else
27af038494ef2 (Mel Gorman 2010-11-24 12:57:17 -0800 70) grep "^#define __GFP" $SOURCE/include/linux/gfp.h | sed -e 's/(__force gfp_t)//' | sed -e 's/u)/)/' | grep -v GFP_BITS | sed -e 's/)\//) \//' > $TMPFILE
27af038494ef2 (Mel Gorman 2010-11-24 12:57:17 -0800 71) fi
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 72)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 73) # Parse the flags
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 74) IFS="
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 75) "
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 76) echo Source: $SOURCE
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 77) echo Parsing: $GFPMASK
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 78) for LINE in `cat $TMPFILE`; do
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 79) MASK=`echo $LINE | awk '{print $3}'`
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 80) if [ $(($GFPMASK&$MASK)) -ne 0 ]; then
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 81) echo $LINE
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 82) fi
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 83) done
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 84)
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 85) rm -f $TMPFILE
608e8e66a154c (Mel Gorman 2009-06-16 15:33:04 -0700 86) exit 0
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