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-rwxr-xr-xmodules.d/slx-dmsetup/scripts/dmsetup-slx-device52
1 files changed, 48 insertions, 4 deletions
diff --git a/modules.d/slx-dmsetup/scripts/dmsetup-slx-device b/modules.d/slx-dmsetup/scripts/dmsetup-slx-device
index 4b087130..2dcd7eb3 100755
--- a/modules.d/slx-dmsetup/scripts/dmsetup-slx-device
+++ b/modules.d/slx-dmsetup/scripts/dmsetup-slx-device
@@ -61,7 +61,7 @@ handle_unit() {
declare -ag linear snapshot thin_snapshot thin_volume
parse_config() {
[ -z "$1" ] && return 1
- while IFS= read -r line; do
+ while IFS= read -r line || [ -n "$line" ]; do
[ -z "$line" ] && continue
read -r type name range crypt ignore <<< "$line"
type=${type//-/_} # to use the type as variable in eval
@@ -428,6 +428,7 @@ find_ntfs_partitions() {
return
fi
local part sum
+ ntfs_extra_space_sz=0
for part in /dev/disk/by-partuuid/*; do
# Only count ranges >= 256MB, sum will be in number of 512b blocks
sum="$( ntfsfree --block-size 512 --min-size "$(( 256 * 1024 * 1024 ))" "$part" \
@@ -435,14 +436,22 @@ find_ntfs_partitions() {
# Only consider volume if sum of these ranges > 1GB (this is BLOCKS, not bytes)
(( "$sum" > 2 * 1024 * 1024 )) || continue
echo "$sum $part" # only thing in loop going to stdout
+ (( ntfs_extra_space_sz += sum ))
done | sort -nr > "$ntfs_list"
}
+ntfs_extra_space_sz=0
###
## MAIN
###
. /etc/openslx
+
+. slx-tools
+# "Preload" functions by executing them NOT in a subshell
+dev_find_partitions &> /dev/null
+dev_swap_version &> /dev/null
+
# This is the main variable driving this script
declare -g writable_device=
if [ -z "$SLX_WRITABLE_DEVICE_IDENTIFIER" ]; then
@@ -455,7 +464,7 @@ fi
if [ -n "$SLX_WRITABLE_DEVICE_IDENTIFIER" ]; then
# only first one for now TODO create linear devices of all ID44s
declare -a writable_devices
- writable_devices=( $( slx-tools dev_find_partitions "${SLX_WRITABLE_DEVICE_IDENTIFIER[@]}" ) )
+ writable_devices=( $( dev_find_partitions "${SLX_WRITABLE_DEVICE_IDENTIFIER[@]}" ) )
if [[ "${#writable_devices[@]}" -eq 0 && "$SLX_NTFSFREE" != "never" ]] || [ "$SLX_NTFSFREE" = "always" ]; then
find_ntfs_partitions
fi
@@ -526,9 +535,44 @@ declare -rg writable_device_sz="$( blockdev --getsz "$writable_device" )"
# If SLX_WRITABLE_DEVICE_PARTITION_TABLE is not set, just do
# regular thin-snapshot for the CoW layer, else parse it.
-if [ -n "$SLX_WRITABLE_DEVICE_PARTITION_TABLE" ]; then
- parse_config "$SLX_WRITABLE_DEVICE_PARTITION_TABLE"
+if [ -z "$SLX_WRITABLE_DEVICE_PARTITION_TABLE" ]; then
+ SLX_WRITABLE_DEVICE_PARTITION_TABLE="thin-snapshot root 100% 0"
fi
+
+# extra swap?
+if grep -qFw 'slx.swap' "/proc/cmdline"; then
+ # Only if our basic writable_device is large enough, or we have ntfs backup
+ do_swap_sz=0
+ if (( writable_device_sz > 80078125 )); then
+ # more than ~40GB, go ahead
+ do_swap_sz="$(( ( writable_device_sz - 70312500 ) / 2 ))"
+ # cap to 6GB
+ (( do_swap_sz > 11718750 )) && do_swap_sz=11718750
+ elif [ "$SLX_NTFSFREE" = "backup" ] \
+ && (( ntfs_extra_space_sz > 70312500 )) && (( writable_device_sz > 11718750 )); then
+ # more than 40GB NTFS backup space, more than 6GB ID44, make 4GB swap
+ do_swap_sz=7812500
+ fi
+ # Check how many we have and if they're regular, unencrypted ones.
+ # If it's plenty, don't cut out swap from our backing device
+ swap_sz=0
+ for part in $( dev_find_partitions "82" "0657fd6d-a4ab-43c4-84e5-0933c84b4f4f" ); do
+ dev_swap_version "$part" &> /dev/null || continue
+ this_sz="$( blockdev --getsz "$part" )"
+ (( this_sz > 0 )) && (( swap_sz += this_sz ))
+ done
+ echo "Have existing swap of $swap_sz blocks"
+ # Go ahead with swap? Only if existing swap < 4GB. If so, add line to table.
+ if (( do_swap_sz > 0 )) && (( swap_sz < 7812500 )); then
+ echo "Adding $do_swap_sz blocks of additional swap on backing dev"
+ skb="$(( do_swap_sz / 2 ))"
+ SLX_WRITABLE_DEVICE_PARTITION_TABLE="$( printf "%s\n%s" "linear slx-swap ${skb}K 0" \
+ "$SLX_WRITABLE_DEVICE_PARTITION_TABLE" )"
+ fi
+fi
+
+parse_config "$SLX_WRITABLE_DEVICE_PARTITION_TABLE"
+
# Default to thin-snapshot, if none were configured
if [ "${#snapshot[@]}" = 0 ] && [ "${#thin_snapshot[@]}" = 0 ]; then
parse_config "thin-snapshot root 100% 0"