Signed-off-by: Kirill Tkhai <[email protected]>
---
scripts/qcow2-dm.sh | 144 +++++++++++++++++++++++++++++++++++++++++++--------
1 file changed, 122 insertions(+), 22 deletions(-)
diff --git a/scripts/qcow2-dm.sh b/scripts/qcow2-dm.sh
index e29205e3f973..c31872dda05f 100755
--- a/scripts/qcow2-dm.sh
+++ b/scripts/qcow2-dm.sh
@@ -7,9 +7,38 @@ usage () {
Usage:
$prog_name create <file.qcow2> <dev_name>
$prog_name remove <file.qcow2>
+ $prog_name check [qemu-img check optional args] <file.qcow2>
+ $prog_name snapshot [qemu-img snapshot optional args] <file.qcow2>
+ $prog_name resize [qemu-img resize optional args] <file.qcow2> [+ |
-]size
EOF
}
+get_dev_of_image () {
+ abs_path=$1
+
+ while read line; do
+ dev=`echo $line | sed "s/:.*//"`
+ nr_imgs=`echo $line | sed "s/.*\(\w\)$/\1/"`
+ top_img_id=$((nr_imgs - 1))
+
+ top_img_path=`dmsetup message $dev 0 get_img_name $top_img_id`
+ if [ -z "$top_img_path" ]; then
+ echo >&2 "Error during search of device"; exit 1;
+ return 1
+ fi
+
+ if [ "$abs_path" != "$top_img_path" ]; then
+ continue
+ fi
+
+ echo $dev
+ return 0
+
+ done < <(LANG=C dmsetup table --target=qcow2 | grep -v "No devices
found")
+
+ return 0
+}
+
create () {
if [ "$#" -ne 2 ]; then
echo >&2 "Wrong number of arguments."; usage; exit 1;
@@ -20,6 +49,8 @@ create () {
files=()
fds=""
+ qemu-img check $file || exit 1
+
disk_sz=`qemu-img info -f qcow2 $file | grep "virtual size" | sed
's/.*(\(.*\) bytes)/\1/'`
if [ -z "$disk_sz" ]; then
echo "Can't get disk size."; exit 1;
@@ -51,37 +82,94 @@ remove () {
echo >&2 "Wrong number of arguments."; usage; exit 1;
fi
user_path=$1
- path=`realpath $user_path`
+ abs_path=`realpath $user_path`
- while read line; do
- dev=`echo $line | sed "s/:.*//"`
- nr_imgs=`echo $line | sed "s/.*\(\w\)$/\1/"`
- top_img_id=$((nr_imgs - 1))
+ dev=$(get_dev_of_image "$abs_path")
+ if [ -z "$dev" ]; then
+ echo >&2 "Can't find device with [$user_path] top image."; exit
1
+ fi
- top_img_path=`dmsetup message $dev 0 get_img_name $top_img_id`
- if [ -z "$top_img_path" ]; then
- echo "Can't get image path."; exit 1;
- fi
+ echo "Removing device [$dev]."
+ dmsetup remove $dev
+ ret=$?
- if [ "$path" != "$top_img_path" ]; then
- continue
+ if [ $ret -eq 0 ]; then
+ #Sanity check
+ echo "Checking [$abs_path]."
+ qemu-img check $abs_path
+ fi
+ exit $ret
+}
+
+qemu_img ()
+{
+ if [ "$#" -lt 3 ]; then
+ echo >&2 "Wrong number of arguments."; usage; exit 1;
+ fi
+
+ user_path=$1
+ cmd=$2
+ abs_path=`realpath $user_path`
+ qemu_img_args=${@: 2}
+
+ dev=$(get_dev_of_image "$abs_path")
+ if [ -z "$dev" ]; then
+ echo >&2 "Can't find device by [$user_path]."; return 1
+ fi
+
+ echo "Suspending $dev"
+ dmsetup suspend $dev || exit 1
+
+ if [ "$cmd" != "check" ]; then
+ echo "Checking $abs_path"
+ qemu-img check $abs_path
+ ret=$?
+ if [ $ret -ne 0 ]; then
+ echo "Resume $dev."
+ dmsetup resume $dev
+ exit 1
fi
+ fi
- echo "Removing device [$dev]."
- dmsetup remove $dev
+ echo "===== Call: qemu-img $qemu_img_args. ====="
+ qemu-img $qemu_img_args
+ ret=$?
+ if [ $ret -ne 0 ]; then
+ echo >&2 "Failed during qemu-img call."
+ fi
+ echo "===== End of qemu-img $qemu_img_args. ====="
+
+ echo "Resume $dev."
+ dmsetup resume $dev || exit 1
+ if [ $? -ne 0 ]; then
ret=$?
+ fi
- if [ $? -eq 0 ]; then
- #Sanity check
- echo "Checking [$top_img_path]."
- qemu-img check $top_img_path
- fi
- exit $ret
+ return $ret
+}
- done < <(LANG=C dmsetup table --target=qcow2 | grep -v "No devices
found")
+check () {
+ user_path=${@: -1}
+ qemu_img_args=$@
+
+ qemu_img $user_path check $qemu_img_args
+ return $?
+}
+
+snapshot () {
+ user_path=${@: -1}
+ qemu_img_args=$@
+
+ qemu_img $user_path snapshot $qemu_img_args
+ return $?
+}
- echo "Can't find device with [$user_path] top image."
- exit 1
+resize () {
+ user_path=${@:(-2):1}
+ qemu_img_args=$@
+
+ qemu_img $user_path resize $qemu_img_args
+ return $?
}
prog_name=$(basename $0)
@@ -96,6 +184,18 @@ case $1 in
shift
remove "$@"
;;
+ "check")
+ shift
+ check "$@"
+ ;;
+ "snapshot")
+ shift
+ snapshot "$@"
+ ;;
+ "resize")
+ shift
+ resize "$@"
+ ;;
*)
usage
exit 1
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