114 lines
3.2 KiB
Plaintext
114 lines
3.2 KiB
Plaintext
# Copyright 2012 Hewlett-Packard Development Company, L.P.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
function mk_build_dir () {
|
|
export TMP_BUILD_DIR=$(mktemp -t -d image.XXXXXXXX)
|
|
[ $? -eq 0 ] || die "Failed to create tmp directory"
|
|
trap cleanup EXIT
|
|
echo Building in $TMP_BUILD_DIR
|
|
export TMP_IMAGE_PATH=$TMP_BUILD_DIR/image
|
|
export TMP_HOOKS_PATH=$TMP_BUILD_DIR/hooks
|
|
}
|
|
|
|
function save_image () {
|
|
# TODO: this really should rename the old file
|
|
if [ -f $1 ] ; then
|
|
echo "Old Image file Found REMOVING"
|
|
rm -f $1
|
|
fi
|
|
|
|
cp $TMP_IMAGE_PATH $1
|
|
rm -r $TMP_BUILD_DIR
|
|
# All done!
|
|
trap EXIT
|
|
echo "Image file $1 created..."
|
|
}
|
|
|
|
function generate_hooks () {
|
|
mkdir -p $TMP_HOOKS_PATH
|
|
for _FLAVOUR in $IMAGE_FLAVOUR ; do
|
|
[ -d $FLAVOURS_DIR/$_FLAVOUR ] || die "The flavour does not exist." ;
|
|
cp -t $TMP_HOOKS_PATH -a $FLAVOURS_DIR/$_FLAVOUR/* ;
|
|
done
|
|
}
|
|
|
|
# Check that a real flavour has been chosen (prevents foot-guns)
|
|
function check_flavour () {
|
|
[ -d $TMP_HOOKS_PATH ] || generate_hooks
|
|
}
|
|
|
|
# Run a hook, looking for a regex in its stdout, and eval the matched lines.
|
|
# $1 is the hook to run
|
|
# $2 is the regex to look for
|
|
function eval_run_d () {
|
|
local TEMP=`run_d $1`
|
|
echo "$TEMP"
|
|
if [ `echo "$TEMP" | grep -s "$2"` ]; then
|
|
TEMP=`echo "$TEMP" | grep "$2"`
|
|
eval "$TEMP"
|
|
fi
|
|
}
|
|
|
|
# Usage: map_nbd $image
|
|
# Returns nbd device path
|
|
function map_nbd {
|
|
(lsmod | grep '^nbd ') || sudo modprobe nbd max_part=16
|
|
|
|
if [[ $(qemu-nbd --help | grep cache) == *writeback* ]] ; then
|
|
CACHE="--cache=writeback"
|
|
else
|
|
echo "Warning: qemu-nbd without --cache=writeback is /slow/."
|
|
CACHE=""
|
|
fi
|
|
NBD_DEV=
|
|
for i in `seq 0 15`; do
|
|
if [ ! -e /sys/block/nbd$i/pid ]; then
|
|
NBD_DEV=/dev/nbd$i
|
|
# Connect to nbd and wait till it is ready
|
|
sudo qemu-nbd -c $NBD_DEV $CACHE $1
|
|
if ! timeout 60 sh -c "while ! [ -e /sys/block/nbd$i/pid ]; do sleep 1; done"; then
|
|
echo "Couldn't connect $NBD_DEV"
|
|
exit 1
|
|
fi
|
|
break
|
|
fi
|
|
done
|
|
if [ -z "$NBD_DEV" ]; then
|
|
echo "No free NBD slots"
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
# Delete and unmount the working dir used in extracting kernel/initrd
|
|
function unmount_qcow_image () {
|
|
sudo umount $WORK_DIR || true
|
|
sudo qemu-nbd -d $NBD_DEV || true
|
|
sudo rm -rf $WORK_DIR
|
|
|
|
trap - SIGHUP SIGINT SIGTERM EXIT
|
|
}
|
|
|
|
function mount_qcow_image() {
|
|
trap unmount_qcow_image SIGHUP SIGINT SIGTERM EXIT
|
|
|
|
WORK_DIR=$(mktemp -d)
|
|
map_nbd $1
|
|
if [ -e "${NBD_DEV}p1" ]; then
|
|
sudo mount ${NBD_DEV}p1 $WORK_DIR
|
|
else
|
|
sudo mount ${NBD_DEV} $WORK_DIR
|
|
fi
|
|
}
|