Skip to content

Dracut cpio-reflink feature detection #1

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 2 commits into from
Closed

Dracut cpio-reflink feature detection #1

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
3b34804
fix: dracut: check reflink feature after loading dracut-init.sh
mwilck Aug 30, 2021
ace2d78
feat: dracut: determine support for cpio-reflink
mwilck Aug 30, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
53 changes: 42 additions & 11 deletions dracut.sh
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1168,17 +1168,6 @@ trap 'exit 1;' SIGINT
readonly initdir="${DRACUT_TMPDIR}/initramfs"
mkdir -p "$initdir"

if [[ $cpio_reflink == "yes" ]]; then
dracut_cpio="$dracutbasedir/dracut-cpio"
if [[ -x $dracut_cpio ]]; then
# align based on statfs optimal transfer size
cpio_align=$(stat --file-system -c "%s" -- "$initdir")
else
dinfo "cpio-reflink ignored due to lack of dracut-cpio"
unset cpio_reflink
fi
fi

# shellcheck disable=SC2154
if [[ $early_microcode == yes ]] || { [[ $acpi_override == yes ]] && [[ -d $acpi_table_dir ]]; }; then
readonly early_cpio_dir="${DRACUT_TMPDIR}/earlycpio"
Expand Down Expand Up @@ -1216,6 +1205,48 @@ else
exit 1
fi

is_reflink_supported() {
dracut_cpio="$dracutbasedir/dracut-cpio"
[ -x $dracut_cpio ] || {
dinfo "cpio-reflink ignored due to lack of dracut-cpio"
return 1
}
local fstype=$(find_mp_fstype $dracutsysrootdir/boot)
case $fstype in
xfs|btrfs) ;;
*)
dinfo "cpio-reflink is unsupported on $fstype"
return 1;;
esac
# reflinking doesn't work across mount points
if mountpoint -q $dracutsysrootdir/boot; then
dinfo "cpio-reflink ignored because /boot is a separate mountpoint"
return 1;
elif [[ $(stat -f -c %i $dracutsysrootdir/) != $(stat -f -c %i "$TMPDIR") ]]; then
dinfo "cpio-reflink ignored because tmpdir=\"$TMPDIR\" is on a separate file system"
return 1
else
return 0
fi
}

if [[ $cpio_reflink == "yes" ]]; then
if [[ ! $compress_l && $do_strip_l != "yes" ]] && is_reflink_supported; then
if [[ $do_strip == "yes" ]]; then
dinfo "ignoring --strip because of cpio-reflink"
do_strip="no"
fi
if [[ $compress != "$DRACUT_COMPRESS_CAT" ]]; then
dinfo "setting compress=\"$DRACUT_COMPRESS_CAT\" because of cpio-reflink"
compress="$DRACUT_COMPRESS_CAT"
fi
# align based on statfs optimal transfer size
cpio_align=$(stat --file-system -c "%s" -- "$initdir")
else
unset cpio_reflink
fi
fi

# shellcheck disable=SC2154
if [[ $no_kernel != yes ]] && ! [[ -d $srcmods ]]; then
printf "%s\n" "dracut: Cannot find module directory $srcmods" >&2
Expand Down