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fsadm: refactor resize_crypt function

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split resize_crypt function in two.

a) Detect proper dm-crypt device type and count new --size
   value for cryptsetup resize command.

b) Perform the resize
This commit is contained in:
Ondrej Kozina 2017-10-24 11:53:22 +02:00
parent 9916d8fa9a
commit dcc8f90c58
1 changed files with 34 additions and 30 deletions
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64
scripts/fsadm.sh
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@ -607,16 +607,12 @@ resize_luks() {
fi
}
#################################
# Resize active crypt device
# (on direct user request only)
#################################
resize_crypt() {
local CRYPT_TYPE=
local TMP=
local SHRINK=0
detect_crypt_device() {
local CRYPT_TYPE
local L_NEWSIZE
local TMP
which $CRYPTSETUP > /dev/null 2>&1 || error "$CRYPTSETUP utility required to resize LUKS volume"
which $CRYPTSETUP > /dev/null 2>&1 || error "$CRYPTSETUP utility required to resize crypt device"
CRYPT_TYPE=$($CRYPTSETUP status $1 2> /dev/null | $GREP "type:")
@ -624,31 +620,38 @@ resize_crypt() {
CRYPT_TYPE=${CRYPT_TYPE##*[[:space:]]}
TMP=$NEWSIZE
decode_size "$2" 512
detect_device_size
if [ "$DEVSIZE" -gt "$NEWSIZE" ]; then
SHRINK=1
fi
NEWSIZE=$TMP
if [ $SHRINK -eq 1 -a -z "$3" ]; then
return
fi
# going to resize, drop the request flag
unset DO_CRYPTRESIZE
case "$CRYPT_TYPE" in
LUKS[12]|PLAIN)
dry $CRYPTSETUP resize "$1" --size $NEWBLOCKCOUNT || error "Failed to resize device $1"
verbose "\"$1\" crypt device is type $CRYPT_TYPE"
;;
*)
error "Unsupported crypt type \"$CRYPT_TYPE\""
esac
TMP=$NEWSIZE
decode_size "$2" 512
L_NEWSIZE=$NEWSIZE
NEWSIZE=$TMP
if [ $((L_NEWSIZE % 512)) -ne 0 ]; then
error "New size is not sector alligned"
fi
CRYPT_RESIZE_BLOCKS=$NEWBLOCKCOUNT
if [ "$DEVSIZE" -ge "$L_NEWSIZE" ]; then
CRYPT_SHRINK=1
else
CRYPT_GROW=1
fi
}
#################################
# Resize active crypt device
# (on direct user request only)
#################################
resize_crypt() {
dry $CRYPTSETUP resize "$1" --size $CRYPT_RESIZE_BLOCKS || error "$CRYPTSETUP failed to resize device $1"
}
####################
@ -664,7 +667,8 @@ resize() {
test -z "$NEWSIZE" && NEWSIZE=${DEVSIZE}b
test -n "$NEWSIZE_ORIG" || NEWSIZE_ORIG=$NEWSIZE
IFS=$NL
test -z "$DO_CRYPTRESIZE" || resize_crypt "$VOLUME_ORIG" "$NEWSIZE_ORIG"
test -z "$DO_CRYPTRESIZE" || detect_crypt_device "$VOLUME_ORIG" "$NEWSIZE_ORIG"
test -z "$CRYPT_GROW" || resize_crypt "$VOLUME_ORIG"
case "$FSTYPE" in
"ext3"|"ext2"|"ext4") resize_ext $NEWSIZE ;;
"reiserfs") resize_reiser $NEWSIZE ;;
@ -674,7 +678,7 @@ resize() {
resize_luks $NEWSIZE ;;
*) error "Filesystem \"$FSTYPE\" on device \"$VOLUME\" is not supported by this tool." ;;
esac || error "Resize $FSTYPE failed."
test -z "$DO_CRYPTRESIZE" || resize_crypt "$VOLUME_ORIG" "$NEWSIZE_ORIG" do_shrink
test -z "$CRYPT_SHRINK" || resize_crypt "$VOLUME_ORIG"
}
####################################