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kernel cmdline: add dm_verity.dev_wait=1

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dm_verity will wait for a device to be ready. This is needed in the factory installer so that
dmsetup doesn't fail early before the usb device is visible.

TEST=built images and booted them (x86-generic & factory installer)
            Prior to commit, need to ensure dev_wait doesn't break unverified boot behavior
BUG=chromium-os:7451

Change-Id: I5b838b94e6a17dd0778331121311cdfe180991ce

Review URL: http://codereview.chromium.org/3936001
This commit is contained in:
Will Drewry 2010-10-20 15:37:46 -05:00
parent debca51332
commit d6435d4746
2 changed files with 17 additions and 0 deletions
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8
build_kernel_image.sh
View File

@ -101,10 +101,18 @@ if [[ -n "${FLAGS_rootfs_image}" && -n "${FLAGS_rootfs_hash}" ]]; then
fi
mkdir -p "${FLAGS_working_dir}"
# Only let dm-verity block if rootfs verification is configured.
dev_wait=0
if [[ ${FLAGS_root} = "/dev/dm-0" ]]; then
dev_wait=1
fi
cat <<EOF > "${FLAGS_working_dir}/boot.config"
root=${FLAGS_root}
dm_verity.error_behavior=${FLAGS_verity_error_behavior}
dm_verity.max_bios=${FLAGS_verity_max_ios}
dm_verity.dev_wait=${dev_wait}
${verity_args}
${FLAGS_boot_args}
EOF

9
create_legacy_bootloader_templates.sh
View File

@ -35,6 +35,12 @@ FLAGS "$@" || exit 1
eval set -- "${FLAGS_ARGV}"
set -e
# Only let dm-verity block if rootfs verification is configured.
dev_wait=0
if [[ ${FLAGS_enable_rootfs_verification} -eq ${FLAGS_TRUE} ]]; then
dev_wait=1
fi
# Common kernel command-line args
common_args="quiet console=tty2 init=/sbin/init boot=local rootwait ro noresume"
common_args="${common_args} noswap loglevel=1 ${FLAGS_boot_args}"
@ -42,6 +48,9 @@ common_args="${common_args} noswap loglevel=1 ${FLAGS_boot_args}"
# Common verified boot command-line args
verity_common="dm_verity.error_behavior=${FLAGS_verity_error_behavior}"
verity_common="${verity_common} dm_verity.max_bios=${FLAGS_verity_max_ios}"
# Ensure that dm-verity waits for its device.
# TODO(wad) should add a timeout that display a useful message
verity_common="${verity_common} dm_verity.dev_wait=${dev_wait}"
# Populate the x86 rootfs to support legacy and EFI bios config templates.
# The templates are used by the installer to populate partition 12 with