Update grub-mkconfig.in and 10_linux.in to support grub-probe's new
partuuid target. Update grub.texi documenation.
Signed-off-by: Nicholas Vinson <nvinson...@gmail.com>
---
docs/grub.texi | 9 +++++++++
util/grub-mkconfig.in | 3 +++
util/grub.d/10_linux.in | 12 +++++++++---
3 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/docs/grub.texi b/docs/grub.texi
index 65b4bbeda..b6a44eb6b 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -1424,6 +1424,15 @@ the Linux kernel, using a @samp{root=UUID=...} kernel
parameter. This is
usually more reliable, but in some cases it may not be appropriate. To
disable the use of UUIDs, set this option to @samp{true}.
+@item GRUB_ENABLE_LINUX_PARTUUID
+Setting this option to @samp{true} changes the behavior of
+@command{grub-mkconfig} so that it identifies the device containing the root
+filesystem by the partition UUID via the @samp{root=PARTUUID=...} kernel
+parameter. This is desirable for Linux systems where identifying the root
+filesystem by its filesystem UUID or device name is imappropriate. However,
+this option is only supported in Linux kernel versions least 2.6.37 (3.10 for
+systems using the MSDOS partition scheme) or newer.
+
@item GRUB_DISABLE_RECOVERY
If this option is set to @samp{true}, disable the generation of recovery
mode menu entries.
diff --git a/util/grub-mkconfig.in b/util/grub-mkconfig.in
index 35ef583b0..9a1f92bdf 100644
--- a/util/grub-mkconfig.in
+++ b/util/grub-mkconfig.in
@@ -134,6 +134,7 @@ fi
# Device containing our userland. Typically used for root= parameter.
GRUB_DEVICE="`${grub_probe} --target=device /`"
GRUB_DEVICE_UUID="`${grub_probe} --device ${GRUB_DEVICE} --target=fs_uuid 2>
/dev/null`" || true
+GRUB_DEVICE_PARTUUID="`${grub_probe} --device ${GRUB_DEVICE} --target=partuuid
2> /dev/null`" || true
# Device containing our /boot partition. Usually the same as GRUB_DEVICE.
GRUB_DEVICE_BOOT="`${grub_probe} --target=device /boot`"
@@ -188,6 +189,7 @@ if [ "x${GRUB_ACTUAL_DEFAULT}" = "xsaved" ] ; then
GRUB_ACTUAL_DEFAULT="`"${grub
# override them.
export GRUB_DEVICE \
GRUB_DEVICE_UUID \
+ GRUB_DEVICE_PARTUUID \
GRUB_DEVICE_BOOT \
GRUB_DEVICE_BOOT_UUID \
GRUB_FS \
@@ -223,6 +225,7 @@ export GRUB_DEFAULT \
GRUB_TERMINAL_OUTPUT \
GRUB_SERIAL_COMMAND \
GRUB_DISABLE_LINUX_UUID \
+ GRUB_ENABLE_LINUX_PARTUUID \
GRUB_DISABLE_RECOVERY \
GRUB_VIDEO_BACKEND \
GRUB_GFXMODE \
diff --git a/util/grub.d/10_linux.in b/util/grub.d/10_linux.in
index faedf74e1..53de33bea 100644
--- a/util/grub.d/10_linux.in
+++ b/util/grub.d/10_linux.in
@@ -45,12 +45,18 @@ esac
# btrfs may reside on multiple devices. We cannot pass them as value of root=
parameter
# and mounting btrfs requires user space scanning, so force UUID in this case.
-if [ "x${GRUB_DEVICE_UUID}" = "x" ] || [ "x${GRUB_DISABLE_LINUX_UUID}" =
"xtrue" ] \
- || ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" \
+if [ "x${GRUB_DEVICE_UUID}" = "x" ] && [ "x${GRUB_DEVICE_PARTUUID}" = "x" ] \
+ || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \
+ || ( ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" \
+ && ! test -e "/dev/disk/by-partuuid/${GRUB_DEVICE_PARTUUID}" ) \
|| ( test -e "${GRUB_DEVICE}" && uses_abstraction "${GRUB_DEVICE}" lvm );
then
LINUX_ROOT_DEVICE=${GRUB_DEVICE}
-else
+elif [ "x${GRUB_ENABLE_LINUX_PARTUUID}" != "xtrue" ] \
+ || [ "x${GRUB_DEVICE_PARTUUID}" = "x" ] \
+ || ! test -e "/dev/disk/by-partuuid/${GRUB_DEVICE_PARTUUID}"; then
LINUX_ROOT_DEVICE=UUID=${GRUB_DEVICE_UUID}
+else
+ LINUX_ROOT_DEVICE=PARTUUID=${GRUB_DEVICE_PARTUUID}
fi
case x"$GRUB_FS" in
--
2.16.2
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