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458 lines
11 KiB
458 lines
11 KiB
#!/bin/bash -ex
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# usage:
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# tar2fs chroot.tar image.raw [size_in_bytes [fstype]]
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. shell-error
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export LANG=C
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if [ $# -lt 2 ]; then
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fatal "error: tar2fs needs at least two arguments"
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fi
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# this needs env_keep sudo setup to actually work
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if [ -n "$GLOBAL_BUILDDIR" ]; then
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WORKDIR="$GLOBAL_BUILDDIR/vmroot"
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else
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WORKDIR="$(mktemp --tmpdir -d vmroot-XXXXX)"
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fi
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[ -n "$WORKDIR" ] || fatal "couldn't come up with suitable WORKDIR"
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[ -n "$GLOBAL_DEBUG" ] || message "WORKDIR: $WORKDIR"
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MB=1048576 # a parted's "megabyte" in bytes is *broken*
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SIZE_FACTOR=2 # multiply the sizes found by this value
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BOOT_SIZE_FACTOR=2 # multiply /boot size by this value additionally
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BOOTLOADERPARTSIZEM=0 # PReP partition size (ppc*)
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CUR_BOUNDARY=0 # align first partition at 1MB for performance (+1)
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BOOTFSTYPE=
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BOOTPART=
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EFIPARTFSTYPE=
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EFIPART=
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BOOTLOADER="$5"
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if [ -n "$6" ]; then
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ARCH="$6"
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else
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ARCH="$(arch)"
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fi
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BOOTTYPE="$8"
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case "$ARCH" in
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e2k*)
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BOOTFSTYPE="ext2" # firmware knows it
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BLOCKDEV="/dev/sda" # ...hopefully...
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BOOTPART="1"
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ROOTPART="2"
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;;
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ppc*)
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BOOTFSTYPE="ext4"
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BLOCKDEV="/dev/sda"
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BOOTLOADERPART="1"
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BOOTLOADERPARTSIZEM="8"
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ROOTPART="2"
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;;
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arm*|aarch64)
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ROOTPART="1"
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BLOCKDEV="/dev/sda"
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CUR_BOUNDARY=15 # offset 16 MiB for singleboard's
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;;
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*)
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ROOTPART="1"
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BLOCKDEV="/dev/sda"
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;;
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esac
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if [ "$BOOTLOADER" == grub-efi -o "$BOOTTYPE" == EFI ]; then
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EFIPART="1"
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EFIPARTSIZEM="256"
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EFIPARTFSTYPE="fat"
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ROOTPART="2"
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fi
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PARTTABLE="$7"
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if [ -z "$PARTTABLE" ]; then
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if [ "$BOOTLOADER" == grub-efi ]; then
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PARTTABLE=gpt
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else
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PARTTABLE=msdos
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fi
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fi
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# figure out the part taken by /boot in the given tarball
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boot_size() {
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if [ -n "$BOOTPART" ]; then
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tar tvf "$1" \
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| awk ' \
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BEGIN { sum=0 }
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/^-.* \.\/boot\// { sum=sum+$3 }
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END { print sum }'
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else
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echo "0"
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fi
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}
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# parted wrapper for convenience
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parting() { parted "$LOOPDEV" --align optimal --script -- "$@"; }
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# unfortunately parted is insane enough to lump alignment controls
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# into unit controls so creating adjacent partitions sized in MiB
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# is not as straightforward as it might be... thus "+1" padding;
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# see also http://www.gnu.org/software/parted/manual/parted.html#unit
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mkpart() {
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# a bit different start/end semantics to handle end of device too
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local start="$(($CUR_BOUNDARY + 1))" # yes, we lose a megabyte
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if [ -n "$1" ]; then
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CUR_BOUNDARY="$(($start + $1))"
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local end="$CUR_BOUNDARY"MiB
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else
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local end="$OFFSET"MiB
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fi
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if [ -n "$2" ]; then
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CUR_FS="$2"
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else
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CUR_FS=ext2
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fi
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parting mkpart primary "$CUR_FS" "$start"MiB "$end"
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}
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# a tarball containing chroot with a kernel
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TAR="$1"
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[ -s "$TAR" ] || fatal "source tarball doesn't really exist"
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# a path to the image to be generated
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IMG="$2"
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[ -d "$(dirname "$IMG")" ] || fatal "target directory doesn't exist"
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# 0 means auto; if a value is specified it holds (no /boot subtracted)
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ROOTSIZE="$3"
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[ -n "$ROOTSIZE" -a "$ROOTSIZE" != 0 ] || unset ROOTSIZE
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# image size in bytes
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TARSIZE="$(stat -Lc %s "$TAR")"
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# /boot size in that tarball
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BOOTSIZE="$(boot_size "$TAR")"
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DEFSIZE="$(($SIZE_FACTOR * ($TARSIZE - $BOOTSIZE)))" # (exact sizes)
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ROOTSIZE="$((${ROOTSIZE:-$DEFSIZE} + $MB - 1))" # for ceil rounding to MB
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# image and /boot sizes in megabytes
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ROOTSIZEM="$(($ROOTSIZE / $MB))"
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BOOTSIZEM="$((($SIZE_FACTOR * $BOOT_SIZE_FACTOR * $BOOTSIZE + $MB - 1) / $MB))"
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# tested to work: ext[234], jfs
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# NB: xfs doesn't have a spare sector for the bootloader
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ROOTFSTYPE="${4:-ext4}"
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# single root partition hardwired so far,
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# add another image for home/data/swap if needed
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ROOTDEV="$BLOCKDEV$ROOTPART"
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# last preparations...
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MKFS="mkfs.$ROOTFSTYPE ${BOOTFSTYPE:+mkfs.$BOOTFSTYPE} \
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${EFIPARTFSTYPE:+mkfs.$EFIPARTFSTYPE}"
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for i in losetup sfdisk parted kpartx $MKFS; do
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if ! type -t "$i" >&/dev/null; then
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fatal "$i required but not found in host system"
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fi
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done
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LOOPDEV="$(losetup --find)" # would be sad about non-binary megabytes too
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ROOTFS="$WORKDIR/chroot"
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BOOTFS=
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EFIPARTFS=
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if [ -n "$BOOTPART" ]; then
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BOOTFS="$ROOTFS/boot"
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fi
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if [ -n "$EFIPART" ]; then
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EFIPARTFS="$ROOTFS/boot/efi"
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fi
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exit_handler() {
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rc=$?
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cd /
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if [ -n "$ROOTFS" ]; then
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umount ${EFIPARTFS:+"$EFIPARTFS"} ${BOOTFS:+"$BOOTFS"} \
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"$ROOTFS"{/dev,/proc,/sys,}
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if [ -n "$LOOPDEV" ]; then
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kpartx -d -s "$LOOPDEV" || {
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sleep 10
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kpartx -d -s -v "$LOOPDEV"
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}
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losetup --detach "$LOOPDEV"
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fi
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rm -r -- "$ROOTFS"
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rmdir -- "$WORKDIR"
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fi
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exit $rc
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}
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# handle -e in shebang as well
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trap exit_handler EXIT ERR
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# prepare disk image and a filesystem inside it
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rm -f -- "$IMG"
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OFFSET="$(($CUR_BOUNDARY + $EFIPARTSIZEM + $BOOTLOADERPARTSIZEM + $BOOTSIZEM + $ROOTSIZEM - 1))"
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dd if=/dev/zero of="$IMG" conv=notrunc bs=$MB count=1 seek="$OFFSET"
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losetup "$LOOPDEV" "$IMG"
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parting mklabel "$PARTTABLE"
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if [ -n "$BOOTLOADERPART" ] && [ -n "$BOOTLOADERPARTSIZEM" ]; then
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case "$ARCH" in
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ppc*)
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parting mkpart primary ext2 $((CUR_BOUNDARY+1))MiB $((BOOTLOADERPARTSIZEM + 1))MiB
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CUR_BOUNDARY="$BOOTLOADERPARTSIZEM"
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parting set 1 prep on
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parting set 1 boot on
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;;
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esac
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fi
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if [ -n "$EFIPART" ]; then
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EFIDEV="$EFIDEV$EFIPART"
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if [ "$PARTTABLE" == gpt ]; then
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parting mkpart fat32 $((CUR_BOUNDARY+1))MiB $(($EFIPARTSIZEM + 1))MiB
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else
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parting mkpart primary fat32 $((CUR_BOUNDARY+1))MiB $(($EFIPARTSIZEM + 1))MiB
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fi
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CUR_BOUNDARY="$EFIPARTSIZEM"
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parting set 1 boot on
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if [ "$PARTTABLE" == gpt ]; then
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parting set 1 esp on
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fi
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fi
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if [ -n "$BOOTPART" ]; then
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BOOTDEV="$BLOCKDEV$BOOTPART"
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mkpart "$BOOTSIZEM"
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fi
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# not ROOTSIZEM but "the rest"; somewhat non-trivial arithmetics lurk in parted
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mkpart
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kpartx -a -s "$LOOPDEV"
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LOOPROOT="/dev/mapper/$(basename "$LOOPDEV")p$ROOTPART"
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mkfs."$ROOTFSTYPE" "$LOOPROOT"
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if [ -n "$BOOTPART" ]; then
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LOOPBOOT="/dev/mapper/$(basename "$LOOPDEV")p$BOOTPART"
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mkfs."$BOOTFSTYPE" "$LOOPBOOT"
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fi
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if [ -n "$BOOTLOADERPART" ] && [ -n "$BOOTLOADERPARTSIZEM" ]; then
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LOOPBOOTLOADER="/dev/mapper/$(basename "$LOOPDEV")p$BOOTLOADERPART"
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fi
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if [ -n "$EFIPART" ]; then
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LOOPEFI="/dev/mapper/$(basename "$LOOPDEV")p$EFIPART"
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mkfs.fat -F32 "$LOOPEFI"
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fi
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ROOTUUID="$(blkid -s UUID -o value -c /dev/null "$LOOPROOT")"
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if [ -n "$ROOTUUID" ]; then
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ROOTDEV="UUID=$ROOTUUID"
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else
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ROOTDEV="$LOOPROOT"
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fi
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if [ -n "$BOOTPART" ]; then
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BOOTUUID="$(blkid -s UUID -o value -c /dev/null "$LOOPBOOT")"
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if [ -n "$BOOTUUID" ]; then
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BOOTDEV="UUID=$BOOTUUID"
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fi
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fi
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if [ -n "$EFIPART" ]; then
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EFIUUID="$(blkid -s UUID -o value -c /dev/null "$LOOPEFI")"
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if [ -n "$EFIUUID" ]; then
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EFIDEV="UUID=$EFIUUID"
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fi
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fi
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# mount and populate it
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mkdir -pm755 "$ROOTFS"
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mount "$LOOPROOT" "$ROOTFS"
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if [ -n "$BOOTPART" ]; then
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mkdir -pm700 "$BOOTFS"
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mount "$LOOPBOOT" "$BOOTFS"
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fi
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if [ -n "$EFIPART" ]; then
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mkdir -pm751 "$EFIPARTFS"
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mount "$LOOPEFI" "$EFIPARTFS"
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fi
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tar -C "$ROOTFS" --numeric-owner -xf "$TAR"
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for i in /dev /proc /sys; do mount --bind "$i" "$ROOTFS$i"; done
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# loop device so lilo could work...
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if grep -qe "[[:space:]]/[[:space:]]" "$ROOTFS/etc/fstab"; then \
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sed -i "s/LABEL=ROOT/$ROOTDEV/" "$ROOTFS/etc/fstab"
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else
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echo "$ROOTDEV / $ROOTFSTYPE relatime 1 1" >> "$ROOTFS/etc/fstab"
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fi
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# target device at once
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if [ -n "$BOOTPART" ]; then
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echo "$BOOTDEV /boot $BOOTFSTYPE defaults 1 2" >> "$ROOTFS/etc/fstab"
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fi
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if [ -n "$EFIPART" ]; then
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echo "$EFIDEV /boot/efi vfat umask=0,quiet,showexec,iocharset=utf8,codepage=866 1 2" >> "$ROOTFS/etc/fstab"
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fi
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# Query ARCH in chroot and redefine arch-dependent variable
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ARCH="$(chroot "$ROOTFS" rpm --eval '%_host_cpu')"
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# NB: don't stick BOOTFS here, it has slightly different semantics
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pushd $ROOTFS/boot
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# 4.9.76-elbrus-def-alt1.11.1 -> def
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get_label() { echo "${1# *}" | sed -r 's,.*elbrus-([0-9a-z]+)-.*$,\1,'; }
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KVERSIONS=
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KVERSIONS="$(chroot "$ROOTFS" rpm -qa 'kernel-image*' \
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--qf '%{installtime} %{version}-%{name}-%{release}\n' \
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| sort -n \
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| cut -f 2 -d ' ' \
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| sed 's/kernel-image-//')"
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[ -n "$KVERSIONS" ] || fatal "unable to deduce kernel version"
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rm -f .origver
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# clean fstab
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sed -i "/LABEL=ROOT/d" "$ROOTFS/etc/fstab"
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# ...target device too
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sed -i "s,$LOOPROOT,$ROOTDEV," "$ROOTFS/etc/fstab"
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echo "** KVERSIONS=[$KVERSIONS]" >&2
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if [ "`echo $KVERSIONS | wc -w`" = 1 ]; then # 2+ labels
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echo -e "default=`get_label $KVERSIONS`\n" >> boot.conf
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fi
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# FIXME: relies on particular (current) kernel package naming scheme
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for v in $KVERSIONS; do
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l="`get_label "$v"`"
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cat >> boot.conf <<EOF
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label=$l
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partition=0
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image=/image-$v
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initrd=/initrd-$v.img
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cmdline=console=ttyS0,115200 console=tty0 consoleblank=0 hardreset root=UUID=$ROOTUUID
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EOF
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done
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echo "** start of boot.conf"
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cat boot.conf
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echo "** end of boot.conf"
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popd
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# Update cmdline.txt for Raspberry Pi
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[ -f "$ROOTFS/boot/efi/cmdline.txt" ] &&
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sed -i "s/LABEL=ROOT/$ROOTDEV/" "$ROOTFS/boot/efi/cmdline.txt"
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# Update extlinux.conf
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if [ -f "$ROOTFS/boot/extlinux/extlinux.conf" ]; then
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sed -i "s/LABEL=ROOT/$ROOTDEV/g" "$ROOTFS/boot/extlinux/extlinux.conf"
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if [ "$PARTTABLE" == gpt ]; then
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parting set "$ROOTPART" legacy_boot on
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fi
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if [ "$PARTTABLE" == msdos ]; then
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parting set "$ROOTPART" boot on
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fi
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fi
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# Setup bootloader
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case "$BOOTLOADER" in
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lilo)
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# configure and install bootloader
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REGEXP='^.*: ([0-9]+) cylinders, ([0-9]+) heads, ([0-9]+) sectors/track*$'
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set -- $(sfdisk -g "$LOOPDEV" | grep -E "$REGEXP" | sed -r "s@$REGEXP@\1 \2 \3@")
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LILO_COMMON="lba32
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delay=1
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vga=0
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image=/boot/vmlinuz
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initrd=/boot/initrd.img
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append=\"root=$ROOTDEV rootdelay=3 console=tty1 console=ttyS0,115200n8\"
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label=linux"
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cat > "$ROOTFS"/etc/lilo-loop.conf <<-EOF
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boot=$LOOPDEV
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disk=$LOOPDEV
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bios=0x80
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cylinders=$1
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heads=$2
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sectors=$3
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partition=$LOOPROOT
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start=63
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$LILO_COMMON
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EOF
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chroot "$ROOTFS" lilo -C /etc/lilo-loop.conf
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cat > "$ROOTFS"/etc/lilo.conf <<-EOF
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boot=$BLOCKDEV
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$LILO_COMMON
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EOF
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;;
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grub-efi)
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echo 'GRUB_DISABLE_OS_PROBER=true' >> "$ROOTFS"/etc/sysconfig/grub2
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chroot "$ROOTFS" grub-mkconfig -o /boot/grub/grub.cfg
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case "$ARCH" in
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x86_64)
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chroot "$ROOTFS" grub-install --target=i386-efi --recheck \
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--removable --uefi-secure-boot
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chroot "$ROOTFS" grub-install --target=x86_64-efi --recheck \
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--removable --uefi-secure-boot
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sed -i 's/initrd16/initrdefi/g' "$ROOTFS/boot/grub/grub.cfg"
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sed -i 's/linux16/linuxefi/g' "$ROOTFS/boot/grub/grub.cfg"
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;;
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aarch64)
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chroot "$ROOTFS" grub-install --target=arm64-efi --recheck \
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--removable --no-uefi-secure-boot
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;;
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armh)
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chroot "$ROOTFS" grub-install --target=arm-efi --recheck \
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--removable --no-uefi-secure-boot
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;;
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riscv64)
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chroot "$ROOTFS" grub-install --target=riscv64-efi --recheck \
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--removable --no-uefi-secure-boot
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esac
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sed -i '/GRUB_DISABLE_OS_PROBER=true/d' "$ROOTFS/etc/sysconfig/grub2"
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;;
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grub)
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echo 'GRUB_DISABLE_OS_PROBER=true' >> "$ROOTFS"/etc/sysconfig/grub2
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chroot "$ROOTFS" grub-mkconfig -o /boot/grub/grub.cfg
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case "$ARCH" in
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*86*)
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chroot "$ROOTFS" grub-install --target=i386-pc "$LOOPDEV"
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sed -i 's/initrdefi/initrd16/g' "$ROOTFS/boot/grub/grub.cfg"
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sed -i 's/linuxefi/linux16/g' "$ROOTFS/boot/grub/grub.cfg"
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;;
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ppc*)
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[ -z "$LOOPBOOTLOADER" ] ||
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chroot "$ROOTFS" grub-install --target=powerpc-ieee1275 \
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--no-nvram "$LOOPBOOTLOADER"
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;;
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esac
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sed -i '/GRUB_DISABLE_OS_PROBER=true/d' "$ROOTFS/etc/sysconfig/grub2"
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;;
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esac
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if [ -n "$SUDO_USER" ]; then
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chown "$SUDO_USER:$(id -g "$SUDO_USER")" "$IMG" ||:
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fi
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# maybe qemu interpreter was copied to chroot;
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# this is no longer necessary, remove
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rm -rf "$ROOTFS"/.host ||:
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