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dracut/zfs-load-key.sh: simplify import loop, quote variable assignments 

The loop now has a less confusing condition and properly uses
systemctl(1) is-failed's return code instead of that entire mess

The assignments could turn into "var=val program" if encryptionroot
or keylocation had whitespace in them

As a bonus, this (mostly) silences shellcheck

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #11198
This commit is contained in:
наб 2020-11-12 23:06:24 +01:00 committed by Brian Behlendorf
parent 85703f616d
commit 2d9f82d891
1 changed files with 5 additions and 7 deletions
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12
contrib/dracut/90zfs/zfs-load-key.sh.in
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@ -17,10 +17,8 @@
[ "${root##zfs:}" = "${root}" ] && [ "${root##ZFS=}" = "${root}" ] && [ "$rootfstype" != "zfs" ] && exit 0
# There is a race between the zpool import and the pre-mount hooks, so we wait for a pool to be imported
while true; do
zpool list -H | grep -q -v '^$' && break
[ "$(systemctl is-failed zfs-import-cache.service)" = 'failed' ] && exit 1
[ "$(systemctl is-failed zfs-import-scan.service)" = 'failed' ] && exit 1
while [ "$(zpool list -H)" = "" ]; do
systemctl is-failed --quiet zfs-import-cache.service zfs-import-scan.service && exit 1
sleep 0.1s
done
@ -34,11 +32,11 @@ else
fi
# if pool encryption is active and the zfs command understands '-o encryption'
if [ "$(zpool list -H -o feature@encryption $(echo "${BOOTFS}" | awk -F\/ '{print $1}'))" = 'active' ]; then
if [ "$(zpool list -H -o feature@encryption "$(echo "${BOOTFS}" | awk -F/ '{print $1}')")" = 'active' ]; then
# if the root dataset has encryption enabled
ENCRYPTIONROOT=$(zfs get -H -o value encryptionroot "${BOOTFS}")
ENCRYPTIONROOT="$(zfs get -H -o value encryptionroot "${BOOTFS}")"
# where the key is stored (in a file or loaded via prompt)
KEYLOCATION=$(zfs get -H -o value keylocation "${ENCRYPTIONROOT}")
KEYLOCATION="$(zfs get -H -o value keylocation "${ENCRYPTIONROOT}")"
if ! [ "${ENCRYPTIONROOT}" = "-" ]; then
KEYSTATUS="$(zfs get -H -o value keystatus "${ENCRYPTIONROOT}")"
# continue only if the key needs to be loaded