#!/bin/bash# SPDX-License-Identifier: GPL-2.0-only# Translate the bits making up a GFP mask# (c) 2009, Mel Gorman <mel@csn.ul.ie>SOURCE=GFPMASK=none# Helper function to report failures and exitdie() { echo ERROR: $@ if [ "$TMPFILE" != "" ]; then rm -f $TMPFILE fi exit -1}usage() { echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask" exit 0}# Parse command-line argumentswhile [ $# -gt 0 ]; do case $1 in --source) SOURCE=$2 shift 2 ;; -h) usage ;; --help) usage ;; *) GFPMASK=$1 shift ;; esacdone# Guess the kernel source directory if it's not set. Preference is in order of# o current directory# o /usr/src/linuxif [ "$SOURCE" = "" ]; then if [ -r "/usr/src/linux/Makefile" ]; then SOURCE=/usr/src/linux fi if [ -r "`pwd`/Makefile" ]; then SOURCE=`pwd` fifi# Confirm that a source directory existsif [ ! -r "$SOURCE/Makefile" ]; then die "Could not locate kernel source directory or it is invalid"fi# Confirm that a GFP mask has been specifiedif [ "$GFPMASK" = "none" ]; then usagefi# Extract GFP flags from the kernel sourceTMPFILE=`mktemp -t gfptranslate-XXXXXX.c` || exit 1echo Source: $SOURCEecho Parsing: $GFPMASK( cat <<EOF#include <stdint.h>#include <stdio.h>// Try to fool compiler.h into not including extra stuff#define __ASSEMBLY__ 1#include <generated/autoconf.h>#include <linux/gfp_types.h>static const char *masks[] = {EOF sed -nEe 's/^[[:space:]]+(___GFP_.*)_BIT,.*$/\1/p' $SOURCE/include/linux/gfp_types.h | while read b; do cat <<EOF#if defined($b) && ($b > 0) [${b}_BIT] = "$b",#endifEOF done cat <<EOF};int main(int argc, char *argv[]){ unsigned long long mask = $GFPMASK; for (int i = 0; i < sizeof(mask) * 8; i++) { unsigned long long bit = 1ULL << i; if (mask & bit) printf("\t%-25s0x%llx\n", (i < ___GFP_LAST_BIT && masks[i]) ? masks[i] : "*** INVALID ***", bit); } return 0;}EOF) > $TMPFILE${CC:-gcc} -Wall -o ${TMPFILE}.bin -I $SOURCE/include $TMPFILE && ${TMPFILE}.binrm -f $TMPFILE ${TMPFILE}.binexit 0
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
# Translate the bits making up a GFP mask
# (c) 2009, Mel Gorman <mel@csn.ul.ie>
SOURCE=
GFPMASK=none
# Helper function to report failures and exit
die() {
echo ERROR: $@
if [ "$TMPFILE" != "" ]; then
rm -f $TMPFILE
fi
exit -1
}
usage() {
echo "usage: gfp-translate [-h] [ --source DIRECTORY ] gfpmask"
exit 0
}
# Parse command-line arguments
while [ $# -gt 0 ]; do
case $1 in
--source)
SOURCE=$2
shift 2
;;
-h)
usage
;;
--help)
usage
;;
*)
GFPMASK=$1
shift
;;
esac
done
# Guess the kernel source directory if it's not set. Preference is in order of
# o current directory
# o /usr/src/linux
if [ "$SOURCE" = "" ]; then
if [ -r "/usr/src/linux/Makefile" ]; then
SOURCE=/usr/src/linux
fi
if [ -r "`pwd`/Makefile" ]; then
SOURCE=`pwd`
fi
fi
# Confirm that a source directory exists
if [ ! -r "$SOURCE/Makefile" ]; then
die "Could not locate kernel source directory or it is invalid"
fi
# Confirm that a GFP mask has been specified
if [ "$GFPMASK" = "none" ]; then
usage
fi
# Extract GFP flags from the kernel source
TMPFILE=`mktemp -t gfptranslate-XXXXXX.c` || exit 1
echo Source: $SOURCE
echo Parsing: $GFPMASK
(
cat <<EOF
#include <stdint.h>
#include <stdio.h>
// Try to fool compiler.h into not including extra stuff
#define __ASSEMBLY__ 1
#include <generated/autoconf.h>
#include <linux/gfp_types.h>
static const char *masks[] = {
EOF
sed -nEe 's/^[[:space:]]+(___GFP_.*)_BIT,.*$/\1/p' $SOURCE/include/linux/gfp_types.h |
while read b; do
cat <<EOF
#if defined($b) && ($b > 0)
[${b}_BIT] = "$b",
#endif
EOF
done
cat <<EOF
};
int main(int argc, char *argv[])
{
unsigned long long mask = $GFPMASK;
for (int i = 0; i < sizeof(mask) * 8; i++) {
unsigned long long bit = 1ULL << i;
if (mask & bit)
printf("\t%-25s0x%llx\n",
(i < ___GFP_LAST_BIT && masks[i]) ?
masks[i] : "*** INVALID ***",
bit);
}
return 0;
}
EOF
) > $TMPFILE
${CC:-gcc} -Wall -o ${TMPFILE}.bin -I $SOURCE/include $TMPFILE && ${TMPFILE}.bin
rm -f $TMPFILE ${TMPFILE}.bin
exit 0