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grub_install: work around intermittent missing loopback partitions

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I am unsure exactly what situation is causing the loopback partition
device node to not exist when it is being mounted but this should help
work around the situation and log loudly about it so we can hopefully
figure out where to dig further.
This commit is contained in:
Michael Marineau 2014-10-08 12:05:45 -07:00
parent cf3e001a11
commit bb1c2559fb
1 changed files with 19 additions and 0 deletions
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19
build_library/grub_install.sh
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@ -97,6 +97,25 @@ grub-mkimage \
info "Installing GRUB ${FLAGS_target} to ${FLAGS_disk_image##*/}"
LOOP_DEV=$(sudo losetup --find --show --partscan "${FLAGS_disk_image}")
ESP_DIR=$(mktemp --directory)
# work around slow/buggy udev, make sure the node is there before mounting
if [[ ! -b "${LOOP_DEV}p1" ]]; then
# sleep a little just in case udev is ok but just not finished yet
warn "loopback device node ${LOOP_DEV}p1 missing, waiting on udev..."
sleep 0.5
for (( i=0; i<5; i++ )); do
if [[ -b "${LOOP_DEV}p1" ]]; then
break
fi
warn "looback device node still ${LOOP_DEV}p1 missing, reprobing..."
blockdev --rereadpt ${LOOP_DEV}
sleep 0.5
done
if [[ ! -b "${LOOP_DEV}p1" ]]; then
failboat "${LOOP_DEV}p1 where art thou? udev has forsaken us!"
fi
fi
sudo mount -t vfat "${LOOP_DEV}p1" "${ESP_DIR}"
sudo cp -r "${STAGE_DIR}/." "${ESP_DIR}/."