0ct0pu5/ladybird
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 2

Meta: Re-use existing disk image where possible

Browse source 
This adds support for re-using and re-sizing existing disk images.
Disk images are checked with e2fsck prior to re-use and a new disk
image is automatically created when that check fails.
This commit is contained in:
Gunnar Beutner 2021-04-23 20:55:57 +02:00 • committed by Andreas Kling
parent a4c1860bfc
commit 479905be6c
Notes: sideshowbarker 2024-07-18 19:11:06 +09:00
1 changed files with 59 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

78
Meta/build-image-qemu.sh
View file

@ -24,38 +24,77 @@ disk_usage() {
}
DISK_SIZE=$(($(disk_usage "$SERENITY_SOURCE_DIR/Base") + $(disk_usage Root) + 100))
DISK_SIZE=${DISK_SIZE:-600}
DISK_SIZE_BYTES=$((DISK_SIZE * 1024 * 1024))
unset DISK_SIZE
echo "setting up disk image..."
qemu-img create _disk_image "${DISK_SIZE:-600}"m || die "could not create disk image"
chown "$SUDO_UID":"$SUDO_GID" _disk_image || die "could not adjust permissions on disk image"
echo "done"
USE_EXISTING=0
printf "creating new filesystem... "
if [ "$(uname -s)" = "OpenBSD" ]; then
VND=$(vnconfig _disk_image)
(echo "e 0"; echo 83; echo n; echo 0; echo "*"; echo "quit") | fdisk -e "$VND"
newfs_ext2fs -D 128 "/dev/r${VND}i" || die "could not create filesystem"
elif [ "$(uname -s)" = "FreeBSD" ]; then
MD=$(mdconfig _disk_image)
mke2fs -q -I 128 _disk_image || die "could not create filesystem"
else
if [ -x /sbin/mke2fs ]; then
/sbin/mke2fs -q -I 128 _disk_image || die "could not create filesystem"
if [ -f _disk_image ]; then
USE_EXISTING=1
echo "checking existing image"
result=0
e2fsck -f -y _disk_image || result=$?
if [ $result -ge 4 ]; then
rm -f _disk_image
USE_EXISTING=0
echo "failed, not using existing image"
else
mke2fs -q -I 128 _disk_image || die "could not create filesystem"
echo "done"
fi
fi
echo "done"
if [ $USE_EXISTING -eq 1 ]; then
OLD_DISK_SIZE_BYTES=$(wc -c < _disk_image)
if [ $DISK_SIZE_BYTES -gt "$OLD_DISK_SIZE_BYTES" ]; then
echo "resizing disk image..."
qemu-img resize -f raw _disk_image $DISK_SIZE_BYTES || die "could not resize disk image"
if ! resize2fs _disk_image; then
rm -f _disk_image
USE_EXISTING=0
echo "failed, not using existing image"
fi
echo "done"
fi
fi
if [ $USE_EXISTING -ne 1 ]; then
printf "setting up disk image... "
qemu-img create -q -f raw _disk_image $DISK_SIZE_BYTES || die "could not create disk image"
chown "$SUDO_UID":"$SUDO_GID" _disk_image || die "could not adjust permissions on disk image"
echo "done"
printf "creating new filesystem... "
if [ "$(uname -s)" = "OpenBSD" ]; then
VND=$(vnconfig _disk_image)
(echo "e 0"; echo 83; echo n; echo 0; echo "*"; echo "quit") | fdisk -e "$VND"
newfs_ext2fs -D 128 "/dev/r${VND}i" || die "could not create filesystem"
elif [ "$(uname -s)" = "FreeBSD" ]; then
MD=$(mdconfig _disk_image)
mke2fs -q -I 128 _disk_image || die "could not create filesystem"
else
if [ -x /sbin/mke2fs ]; then
/sbin/mke2fs -q -I 128 _disk_image || die "could not create filesystem"
else
mke2fs -q -I 128 _disk_image || die "could not create filesystem"
fi
fi
echo "done"
fi
printf "mounting filesystem... "
mkdir -p mnt
use_genext2fs=0
if [ "$(uname -s)" = "Darwin" ]; then
fuse-ext2 _disk_image mnt -o rw+,allow_other,uid=501,gid=20 || die "could not mount filesystem"
echo "done"
elif [ "$(uname -s)" = "OpenBSD" ]; then
mount -t ext2fs "/dev/${VND}i" mnt/ || die "could not mount filesystem"
echo "done"
elif [ "$(uname -s)" = "FreeBSD" ]; then
fuse-ext2 -o rw+,direct_io "/dev/${MD}" mnt/ || die "could not mount filesystem"
echo "done"
else
if ! mount _disk_image mnt/ ; then
if command -v genext2fs 1>/dev/null ; then
@ -64,9 +103,10 @@ else
else
die "could not mount filesystem and genext2fs is missing"
fi
else
echo "done"
fi
fi
echo "done"
cleanup() {
if [ -d mnt ]; then
@ -96,7 +136,7 @@ if [ $use_genext2fs = 1 ]; then
# genext2fs is very slow in generating big images, so I use a smaller image here. size can be updated
# if it's not enough.
# not using "-i 128" since it hangs. Serenity handles whatever default this uses instead.
genext2fs -b 250000 -d mnt _disk_image || die "try increasing image size (genext2fs -b)"
genext2fs -B 4096 -b $((DISK_SIZE_BYTES / 4096)) -d mnt _disk_image || die "try increasing image size (genext2fs -b)"
# if using docker with shared mount, file is created as root, so make it writable for users
chmod 0666 _disk_image
fi