Mel Gorman | 608e8e6 | 2009-06-16 15:33:04 -0700 | [diff] [blame] | 1 | #!/bin/bash |
| 2 | # Translate the bits making up a GFP mask |
| 3 | # (c) 2009, Mel Gorman <mel@csn.ul.ie> |
| 4 | # Licensed under the terms of the GNU GPL License version 2 |
| 5 | SOURCE= |
| 6 | GFPMASK=none |
| 7 | |
| 8 | # Helper function to report failures and exit |
| 9 | die() { |
| 10 | echo ERROR: $@ |
| 11 | if [ "$TMPFILE" != "" ]; then |
| 12 | rm -f $TMPFILE |
| 13 | fi |
| 14 | exit -1 |
| 15 | } |
| 16 | |
| 17 | usage() { |
| 18 | echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask" |
| 19 | exit 0 |
| 20 | } |
| 21 | |
Daniel Mack | 3ad2f3fb | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 22 | # Parse command-line arguments |
Mel Gorman | 608e8e6 | 2009-06-16 15:33:04 -0700 | [diff] [blame] | 23 | while [ $# -gt 0 ]; do |
| 24 | case $1 in |
| 25 | --source) |
| 26 | SOURCE=$2 |
| 27 | shift 2 |
| 28 | ;; |
| 29 | -h) |
| 30 | usage |
| 31 | ;; |
| 32 | --help) |
| 33 | usage |
| 34 | ;; |
| 35 | *) |
| 36 | GFPMASK=$1 |
| 37 | shift |
| 38 | ;; |
| 39 | esac |
| 40 | done |
| 41 | |
| 42 | # Guess the kernel source directory if it's not set. Preference is in order of |
| 43 | # o current directory |
| 44 | # o /usr/src/linux |
| 45 | if [ "$SOURCE" = "" ]; then |
| 46 | if [ -r "/usr/src/linux/Makefile" ]; then |
| 47 | SOURCE=/usr/src/linux |
| 48 | fi |
| 49 | if [ -r "`pwd`/Makefile" ]; then |
| 50 | SOURCE=`pwd` |
| 51 | fi |
| 52 | fi |
| 53 | |
| 54 | # Confirm that a source directory exists |
| 55 | if [ ! -r "$SOURCE/Makefile" ]; then |
| 56 | die "Could not locate kernel source directory or it is invalid" |
| 57 | fi |
| 58 | |
| 59 | # Confirm that a GFP mask has been specified |
| 60 | if [ "$GFPMASK" = "none" ]; then |
| 61 | usage |
| 62 | fi |
| 63 | |
| 64 | # Extract GFP flags from the kernel source |
| 65 | TMPFILE=`mktemp -t gfptranslate-XXXXXX` || exit 1 |
Mel Gorman | 27af038 | 2010-11-24 12:57:17 -0800 | [diff] [blame] | 66 | grep -q ___GFP $SOURCE/include/linux/gfp.h |
| 67 | if [ $? -eq 0 ]; then |
| 68 | grep "^#define ___GFP" $SOURCE/include/linux/gfp.h | sed -e 's/u$//' | grep -v GFP_BITS > $TMPFILE |
| 69 | else |
| 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 |
| 71 | fi |
Mel Gorman | 608e8e6 | 2009-06-16 15:33:04 -0700 | [diff] [blame] | 72 | |
| 73 | # Parse the flags |
| 74 | IFS=" |
| 75 | " |
| 76 | echo Source: $SOURCE |
| 77 | echo Parsing: $GFPMASK |
| 78 | for LINE in `cat $TMPFILE`; do |
| 79 | MASK=`echo $LINE | awk '{print $3}'` |
| 80 | if [ $(($GFPMASK&$MASK)) -ne 0 ]; then |
| 81 | echo $LINE |
| 82 | fi |
| 83 | done |
| 84 | |
| 85 | rm -f $TMPFILE |
| 86 | exit 0 |