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Make initramfs-tools script encryption aware

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Changed decrypt_fs zfs command to "load-key"
Plymouth case code based on "contrib/dracut/90zfs/zfs-lib.sh.in"
Systemd case based on "contrib/dracut/90zfs/zfs-load-key.sh.in"
Cleaned up misspelling of "available" throughout

Code style fixes
Single quote for ${ENCRYPTIONROOT}
Changed "${DECRYPT_CMD}"  to "eval ${DECRYPT_CMD}"

Reviewed-by: Kash Pande <kash@tripleback.net>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tom Caputi <tcaputi@datto.com>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Signed-off-by: Garrett Fields <ghfields@gmail.com>
Closes #8093
This commit is contained in:
Garrett Fields 2018-11-09 14:30:09 -05:00 committed by Brian Behlendorf
parent d48091de81
commit 0500bfd0b9
1 changed files with 29 additions and 59 deletions
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88
contrib/initramfs/scripts/zfs.in
View file

@ -39,7 +39,7 @@ pre_mountroot()
fi
}
# If plymouth is availible, hide the splash image.
# If plymouth is available, hide the splash image.
disable_plymouth()
{
if [ -x /bin/plymouth ] && /bin/plymouth --ping
@ -108,7 +108,7 @@ find_pools()
echo "${pools%%;}" # Return without the last ';'.
}
# Get a list of all availible pools
# Get a list of all available pools
get_pools()
{
local available_pools npools
@ -118,7 +118,7 @@ get_pools()
return 0
fi
# Get the base list of availible pools.
# Get the base list of available pools.
available_pools=$(find_pools "$ZPOOL" import)
# Just in case - seen it happen (that a pool isn't visable/found
@ -181,7 +181,7 @@ get_pools()
available_pools="$apools"
fi
# Return list of availible pools.
# Return list of available pools.
echo "$available_pools"
}
@ -391,67 +391,37 @@ mount_fs()
decrypt_fs()
{
local fs="$1"
# If pool encryption is active and the zfs command understands '-o encryption'
if [ "$(zpool list -H -o feature@encryption $(echo "${fs}" | awk -F\/ '{print $1}'))" = 'active' ]; then
# If the 'zfs key' command isn't availible, exit right here.
"${ZFS}" 2>&1 | grep -q 'key -l ' || return 0
# Determine dataset that holds key for root dataset
ENCRYPTIONROOT=$(${ZFS} get -H -o value encryptionroot "${fs}")
DECRYPT_CMD="${ZFS} load-key '${ENCRYPTIONROOT}'"
# Check if filesystem is encrypted. If not, exit right here.
[ "$(get_fs_value "$fs" encryption)" != "off" ] || return 0
# If root dataset is encrypted...
if ! [ "${ENCRYPTIONROOT}" = "-" ]; then
[ "$quiet" != "y" ] && \
zfs_log_begin_msg "Loading crypto wrapper key for $fs"
# Prompt with plymouth, if active
if [ -e /bin/plymouth ] && /bin/plymouth --ping 2>/dev/null; then
plymouth ask-for-password --prompt "Encrypted ZFS password for ${ENCRYPTIONROOT}" \
--number-of-tries="3" \
--command="${DECRYPT_CMD}"
# Just make sure that ALL crypto modules module is loaded.
# Simplest just to load all...
for mod in sun-ccm sun-gcm sun-ctr
do
[ "$quiet" != "y" ] && zfs_log_progress_msg "${mod} "
# Prompt with systemd, if active
elif [ -e /run/systemd/system ]; then
TRY_COUNT=3
while [ $TRY_COUNT -gt 0 ]; do
systemd-ask-password "Encrypted ZFS password for ${ENCRYPTIONROOT}" --no-tty | \
${DECRYPT_CMD} && break
TRY_COUNT=$((TRY_COUNT - 1))
done
ZFS_CMD="load_module $mod"
ZFS_STDERR="$(${ZFS_CMD} 2>&1)"
ZFS_ERROR="$?"
if [ "${ZFS_ERROR}" != 0 ]
then
[ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
disable_plymouth
echo ""
echo "Command: $ZFS_CMD"
echo "Message: $ZFS_STDERR"
echo "Error: $ZFS_ERROR"
echo ""
echo "Failed to load $mod module."
echo "Please verify that it is availible on the initrd image"
echo "(without it it won't be possible to unlock the filesystem)"
echo "and rerun: $ZFS_CMD"
/bin/sh
else
[ "$quiet" != "y" ] && zfs_log_end_msg
# Prompt with ZFS tty, otherwise
else
eval "${DECRYPT_CMD}"
fi
fi
done
# If the key isn't availible, then this will fail!
ZFS_CMD="${ZFS} key -l -r $fs"
ZFS_STDERR="$(${ZFS_CMD} 2>&1)"
ZFS_ERROR="$?"
if [ "${ZFS_ERROR}" != 0 ]
then
[ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
disable_plymouth
echo ""
echo "Command: $ZFS_CMD"
echo "Message: $ZFS_STDERR"
echo "Error: $ZFS_ERROR"
echo ""
echo "Failed to load zfs encryption wrapper key (s)."
echo "Please verify dataset property 'keysource' for datasets"
echo "and rerun: $ZFS_CMD"
/bin/sh
else
[ "$quiet" != "y" ] && zfs_log_end_msg
fi
return 0