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Mel Gorman608e8e62009-06-16 15:33:04 -07001#!/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
5SOURCE=
6GFPMASK=none
7
8# Helper function to report failures and exit
9die() {
10 echo ERROR: $@
11 if [ "$TMPFILE" != "" ]; then
12 rm -f $TMPFILE
13 fi
14 exit -1
15}
16
17usage() {
18 echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask"
19 exit 0
20}
21
Daniel Mack3ad2f3f2010-02-03 08:01:28 +080022# Parse command-line arguments
Mel Gorman608e8e62009-06-16 15:33:04 -070023while [ $# -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=$1
37 shift
38 ;;
39 esac
40done
41
42# Guess the kernel source directory if it's not set. Preference is in order of
43# o current directory
44# o /usr/src/linux
45if [ "$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
52fi
53
54# Confirm that a source directory exists
55if [ ! -r "$SOURCE/Makefile" ]; then
56 die "Could not locate kernel source directory or it is invalid"
57fi
58
59# Confirm that a GFP mask has been specified
60if [ "$GFPMASK" = "none" ]; then
61 usage
62fi
63
64# Extract GFP flags from the kernel source
65TMPFILE=`mktemp -t gfptranslate-XXXXXX` || exit 1
Mel Gorman27af0382010-11-24 12:57:17 -080066grep -q ___GFP $SOURCE/include/linux/gfp.h
67if [ $? -eq 0 ]; then
68 grep "^#define ___GFP" $SOURCE/include/linux/gfp.h | sed -e 's/u$//' | grep -v GFP_BITS > $TMPFILE
69else
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
71fi
Mel Gorman608e8e62009-06-16 15:33:04 -070072
73# Parse the flags
74IFS="
75"
76echo Source: $SOURCE
77echo Parsing: $GFPMASK
78for LINE in `cat $TMPFILE`; do
79 MASK=`echo $LINE | awk '{print $3}'`
80 if [ $(($GFPMASK&$MASK)) -ne 0 ]; then
81 echo $LINE
82 fi
83done
84
85rm -f $TMPFILE
86exit 0