From 42505744e01153ac2be71a40130d2525536e9556 Mon Sep 17 00:00:00 2001 From: Doug Goldstein Date: Thu, 17 Dec 2020 20:27:14 -0600 Subject: [PATCH] zfs: fix LINUX_ROOT_DEVICE when grub-probe fails When grub-probe fails, the current code is to just stuff an empty result in which causes the user to not knowingly have a system that no longer boots. grub-probe can fail because the ZFS pool that contains the root filesystem might have features that grub does not yet support which is a common configuration for people with a rpool and a bpool. This behavior uses the zdb utility to dump the same value as the filesystem label would print. Signed-off-by: Doug Goldstein Gbp-Pq: Topic upstream Gbp-Pq: Name zfs-fix-LINUX_ROOT_DEVICE-when-grub-probe-fails.patch --- util/grub.d/10_linux.in | 2 +- util/grub.d/20_linux_xen.in | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/util/grub.d/10_linux.in b/util/grub.d/10_linux.in index 041521c..611cc3e 100644 --- a/util/grub.d/10_linux.in +++ b/util/grub.d/10_linux.in @@ -94,7 +94,7 @@ case x"$GRUB_FS" in GRUB_CMDLINE_LINUX="rootflags=subvol=${rootsubvol} ${GRUB_CMDLINE_LINUX}" fi;; xzfs) - rpool=`${grub_probe} --device ${GRUB_DEVICE} --target=fs_label 2>/dev/null || true` + rpool=`${grub_probe} --device ${GRUB_DEVICE} --target=fs_label 2>/dev/null || zdb -l ${GRUB_DEVICE} | awk -F \' '/ name/ { print $2 }'` bootfs="`make_system_path_relative_to_its_root / | sed -e "s,@$,,"`" LINUX_ROOT_DEVICE="ZFS=${rpool}${bootfs%/}" ;; diff --git a/util/grub.d/20_linux_xen.in b/util/grub.d/20_linux_xen.in index a0c2d71..7d67587 100644 --- a/util/grub.d/20_linux_xen.in +++ b/util/grub.d/20_linux_xen.in @@ -86,7 +86,7 @@ case x"$GRUB_FS" in GRUB_CMDLINE_LINUX="rootflags=subvol=${rootsubvol} ${GRUB_CMDLINE_LINUX}" fi;; xzfs) - rpool=`${grub_probe} --device ${GRUB_DEVICE} --target=fs_label 2>/dev/null || true` + rpool=`${grub_probe} --device ${GRUB_DEVICE} --target=fs_label 2>/dev/null || zdb -l ${GRUB_DEVICE} | awk -F \' '/ name/ { print $2 }'` bootfs="`make_system_path_relative_to_its_root / | sed -e "s,@$,,"`" LINUX_ROOT_DEVICE="ZFS=${rpool}${bootfs%/}" ;; -- 2.30.2