diff options
| -rwxr-xr-x | modules.d/slx-dmsetup/hooks/dmsetup-slx-device | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/modules.d/slx-dmsetup/hooks/dmsetup-slx-device b/modules.d/slx-dmsetup/hooks/dmsetup-slx-device index 0888e97c..4c41af4b 100755 --- a/modules.d/slx-dmsetup/hooks/dmsetup-slx-device +++ b/modules.d/slx-dmsetup/hooks/dmsetup-slx-device @@ -241,15 +241,16 @@ ramdisk_fallback() { mkdir -p "$cow_tmpfs" fi if ! mount -t tmpfs cow-tmpfs -o size="$(( read_only_device_sz / 2 + 100 ))k" "$cow_tmpfs"; then - echo "$0: Failed to mount tmpfs in '$cow_tmpfs' of size '$(( read_only_device_sz / 2 + 100 ))KiB'." + echo "$0: Failed to mount tmpfs in '$cow_tmpfs' of size '$(( read_only_device_sz / 2 + 100 ))KiB', trying to use regular /run tmpfs." fi # create sparse file there - local file="$(mktemp -u -p "$cow_tmpfs" dnbd_cow.XXX)" - if ! dd if=/dev/null of="$file" seek="$(( read_only_device_sz ))" bs=512 2> /dev/null; then + local file="$cow_tmpfs/thinpool.meta" + if ! truncate -s "$(( read_only_device_sz * 512 ))" "$file" \ + && ! dd if=/dev/null of="$file" seek="$read_only_device_sz" bs=512 2> /dev/null; then emergency_shell "Failed to allocate CoW file $file." fi - declare -rg writable_device="$(losetup --show --find "$file")" + declare -rg writable_device="$( losetup --show --find "$file" )" local cow_device_candidate="root" while [ -b "/dev/mapper/$cow_device_candidate" ]; do cow_device_candidate="root.$RANDOM" |