add mmdebstrap-autopkgtest-build-qemu

This commit is contained in:
Helmut Grohne 2023-09-17 07:48:14 +02:00 committed by Johannes Schauer Marin Rodrigues
parent 6cc9d1b99b
commit e07818d2d6
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1

View file

@ -0,0 +1,277 @@
#!/bin/sh
# Copyright 2023 Johannes Schauer Marin Rodrigues <josch@debian.org>
# Copyright 2023 Helmut Grohne <helmut@subdivi.de>
# SPDX-License-Identifier: MIT
#
# This script is mostly compatible with autopkgtest-build-qemu as shipped in
# autopkgtest. Main differences:
# * It does not support any value for --boot but efi.
# * It uses different tools, most importantly swaps out vmdb2.
# * It can be run as non-root via user namespaces.
# We generally use single quotes to avoid variable expansion:
# shellcheck disable=SC2016
set -eu
die() {
echo "$*" 1>&2
exit 1
}
usage() {
die "usage: $0 [--boot=|--architecture=|--apt-proxy=|--keyring=|--mirror=|--script=|--size=] <RELEASE> <IMAGE> [MIRROR] [ARCHITECTURE] [SCRIPT] [SIZE]"
}
usage_error() {
echo "error: $*" 1>&2
usage
}
BOOT=auto
ARCHITECTURE=$(dpkg --print-architecture)
IMAGE=
MIRROR=
KEYRING=
RELEASE=
SIZE=25G
SCRIPT=
# consumed by setup-testbed
export AUTOPKGTEST_BUILD_QEMU=1
opt_boot() {
BOOT="$1"
}
opt_architecture() {
ARCHITECTURE="$1"
}
opt_apt_proxy() {
# consumed by setup-testbed
export AUTOPKGTEST_APT_PROXY="$1"
# consumed by mmdebstrap
if test "$1" = DIRECT; then
unset http_proxy
else
export http_proxy="$1"
fi
}
opt_keyring() {
KEYRING="$1"
}
opt_mirror() {
# consumed by setup-testbed
export MIRROR="$1"
}
opt_script() {
SCRIPT="$1"
}
opt_size() {
SIZE="$1"
}
positional=1
positional_1() {
# consumed by setup-testbed
export RELEASE="$1"
}
positional_2() {
IMAGE="$1"
}
positional_3() { opt_mirror "$@"; }
positional_4() { opt_architecture "$@"; }
positional_5() { opt_script "$@"; }
positional_6() { opt_size "$@"; }
positional_7() {
die "too many positional options"
}
while test "$#" -gt 0; do
case "$1" in
--architecture=*|--boot=*|--keyring=*|--mirror=*|--script=*|--size=*)
optname="${1%%=*}"
"opt_${optname#--}" "${1#*=}"
;;
--apt-proxy=*)
opt_apt_proxy "${1#*=}"
;;
--architecture|--boot|--keyring|--mirror|--script|--size)
test "$#" -ge 2 || usage_error "missing argument for $1"
"opt_${1#--}" "$2"
shift
;;
--apt-proxy)
test "$#" -ge 2 || usage_error "missing argument for $1"
opt_apt_proxy "$2"
shift
;;
--efi)
opt_boot efi
;;
--*)
usage_error "unrecognized argument $1"
;;
*)
"positional_$positional" "$1"
positional=$((positional + 1))
;;
esac
shift
done
test -z "$RELEASE" -o -z "$IMAGE" && usage_error "missing positional arguments"
test "$BOOT" = efi ||
die "this tool does not support boot modes other than efi"
case "$ARCHITECTURE" in
amd64)
EFIIMG=bootx64.efi
;;
arm64)
EFIIMG=bootaa64.efi
;;
armhf)
EFIIMG=bootarm.efi
;;
i386)
EFIIMG=bootia32.efi
;;
riscv64)
EFIIMG=bootriscv64.efi
;;
*)
die "unsupported architecture"
;;
esac
GNU_ARCHITECTURE="$(dpkg-architecture "-a$ARCHITECTURE" -qDEB_HOST_GNU_TYPE)"
for pkg in autopkgtest "binutils-$(echo "$GNU_ARCHITECTURE" | tr _ -)" dosfstools e2fsprogs fdisk mount mtools passwd "systemd-boot-efi:$ARCHITECTURE" uidmap; do
test "$(dpkg-query -f '${db:Status-Status}' -W "$pkg")" = installed ||
die "please install $pkg"
done
BOOTSTUB="/usr/lib/systemd/boot/efi/linux${EFIIMG#boot}.stub"
WORKDIR=
cleanup() {
test -n "$WORKDIR" && rm -Rf "$WORKDIR"
}
trap cleanup EXIT INT TERM QUIT
WORKDIR=$(mktemp -d)
FAT_OFFSET_SECTORS=$((1024*2))
FAT_SIZE_SECTORS=$((1024*254))
# Make the image writeable to the first subgid. mmdebstrap will map this gid to
# the root group. unshare instead will map the current gid to 0 and the first
# subgid to 1. Therefore mmdebstrap will be able to write to the image.
rm -f "$IMAGE"
: >"$IMAGE"
unshare -U -r --map-groups=auto chown 0:1 "$IMAGE"
chmod 0660 "$IMAGE"
set -- \
--mode=unshare \
--variant=important \
--architecture="$ARCHITECTURE"
test "$RELEASE" = jessie &&
set -- "$@" --hook-dir=/usr/share/mmdebstrap/hooks/jessie-or-older
set -- "$@" \
"--include=init,linux-image-$ARCHITECTURE,python3" \
'--customize-hook=echo autopkgtestvm >"$1/etc/hostname"' \
'--customize-hook=echo 127.0.0.1 localhost autopkgtestvm >"$1/etc/hosts"' \
'--customize-hook=passwd --root "$1" --delete root' \
'--customize-hook=useradd --root "$1" --home-dir /home/user --create-home user' \
'--customize-hook=passwd --root "$1" --delete user' \
'--customize-hook=/usr/share/autopkgtest/setup-commands/setup-testbed'
test -n "$SCRIPT" && set -- "$@" "--customize-hook=$SCRIPT"
EXT4_OFFSET_BYTES=$(( (FAT_OFFSET_SECTORS + FAT_SIZE_SECTORS) * 512))
EXT4_OPTIONS="offset=$EXT4_OFFSET_BYTES,assume_storage_prezeroed=1"
set -- "$@" \
"--customize-hook=download vmlinuz '$WORKDIR/kernel'" \
"--customize-hook=download initrd.img '$WORKDIR/initrd'" \
'--customize-hook=mount --bind "$1" "$1/mnt"' \
'--customize-hook=mount --bind "$1/mnt/mnt" "$1/mnt/dev"' \
'--customize-hook=/sbin/mkfs.ext4 -d "$1/mnt" -L autopkgtestvm -E '"'$EXT4_OPTIONS' '$IMAGE' '$SIZE'" \
'--customize-hook=umount --lazy "$1/mnt"' \
"$RELEASE" \
/dev/null
test -n "$MIRROR" && set -- "$@" "$MIRROR"
test -n "$KEYRING" && set -- "$@" "--keyring=$KEYRING"
echo "mmdebstrap $*"
mmdebstrap "$@" || die "mmdebstrap failed"
unshare -U -r --map-groups=auto chown 0:0 "$IMAGE"
chmod "$(printf %o "$(( 0666 - 0$(umask) ))")" "$IMAGE"
echo "root=LABEL=autopkgtestvm rw console=ttyS0" > "$WORKDIR/cmdline"
align_size() {
echo "$(( ($1) + ($2) - 1 - (($1) + ($2) - 1) % ($2) ))"
}
alignment=$("$GNU_ARCHITECTURE-objdump" -p "$BOOTSTUB" | sed 's/^SectionAlignment\s\+\([0-9]\)/0x/;t;d')
test -z "$alignment" && die "failed to discover the alignment of the efi stub"
echo "determined efi vma alignment as $alignment"
test "$RELEASE" = jessie -a "$((alignment))" -lt "$((1024*1024))" && {
echo "increasing efi vma alignment for jessie"
alignment=$((1024*1024))
}
lastoffset=0
# shellcheck disable=SC2034 # unused variables serve documentation
lastoffset="$("$GNU_ARCHITECTURE-objdump" -h "$BOOTSTUB" |
while read -r idx name size vma lma fileoff algn behind; do
test -z "$behind" -a "${algn#"2**"}" != "$algn" || continue
offset=$(( 0x$vma + 0x$size ))
test "$offset" -gt "$lastoffset" || continue
lastoffset="$offset"
echo "$lastoffset"
done | tail -n1)"
lastoffset=$(align_size "$lastoffset" "$alignment")
echo "determined minimum efi vma offset as $lastoffset"
cmdline_size="$(stat -Lc%s "$WORKDIR/cmdline")"
cmdline_size="$(align_size "$cmdline_size" "$alignment")"
linux_size="$(stat -Lc%s "$WORKDIR/kernel")"
linux_size="$(align_size "$linux_size" "$alignment")"
cmdline_offset="$lastoffset"
linux_offset=$((cmdline_offset + cmdline_size))
initrd_offset=$((linux_offset + linux_size))
SOURCE_DATE_EPOCH=0 \
"$GNU_ARCHITECTURE-objcopy" \
--enable-deterministic-archives \
--add-section .cmdline="$WORKDIR/cmdline" \
--change-section-vma .cmdline="$(printf 0x%x "$cmdline_offset")" \
--add-section .linux="$WORKDIR/kernel" \
--change-section-vma .linux="$(printf 0x%x "$linux_offset")" \
--add-section .initrd="$WORKDIR/initrd" \
--change-section-vma .initrd="$(printf 0x%x "$initrd_offset")" \
"$BOOTSTUB" "$WORKDIR/efiimg"
rm -f "$WORKDIR/kernel" "$WORKDIR/initrd"
truncate -s "$((FAT_SIZE_SECTORS * 512))" "$WORKDIR/fat"
/sbin/mkfs.fat -F 32 --invariant "$WORKDIR/fat"
mmd -i "$WORKDIR/fat" EFI EFI/BOOT
mcopy -i "$WORKDIR/fat" "$WORKDIR/efiimg" "::EFI/BOOT/$EFIIMG"
rm -f "$WORKDIR/efiimg"
truncate --size="+$((34*512))" "$IMAGE"
/sbin/sfdisk "$IMAGE" <<EOF
label: gpt
unit: sectors
start=$FAT_OFFSET_SECTORS, size=$FAT_SIZE_SECTORS, type=C12A7328-F81F-11D2-BA4B-00A0C93EC93B
start=$((FAT_OFFSET_SECTORS + FAT_SIZE_SECTORS)), type=0FC63DAF-8483-4772-8E79-3D69D8477DE4
EOF
dd if="$WORKDIR/fat" of="$IMAGE" conv=notrunc,sparse bs=512 "seek=$FAT_OFFSET_SECTORS" status=none